Change signature of attribute setters to take and return boost::optionals

Remove set- prefix for setters

COPYING.LESSER

@@ -0,0 +1,165 @@
+                   GNU LESSER GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+
+  This version of the GNU Lesser General Public License incorporates
+the terms and conditions of version 3 of the GNU General Public
+License, supplemented by the additional permissions listed below.
+
+  0. Additional Definitions.
+
+  As used herein, "this License" refers to version 3 of the GNU Lesser
+General Public License, and the "GNU GPL" refers to version 3 of the GNU
+General Public License.
+
+  "The Library" refers to a covered work governed by this License,
+other than an Application or a Combined Work as defined below.
+
+  An "Application" is any work that makes use of an interface provided
+by the Library, but which is not otherwise based on the Library.
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+
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+object code and/or source code for the Application, including any data
+and utility programs needed for reproducing the Combined Work from the
+Application, but excluding the System Libraries of the Combined Work.
+
+  1. Exception to Section 3 of the GNU GPL.
+
+  You may convey a covered work under sections 3 and 4 of this License
+without being bound by section 3 of the GNU GPL.
+
+  2. Conveying Modified Versions.
+
+  If you modify a copy of the Library, and, in your modifications, a
+facility refers to a function or data to be supplied by an Application
+that uses the facility (other than as an argument passed when the
+facility is invoked), then you may convey a copy of the modified
+version:
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+
+   b) under the GNU GPL, with none of the additional permissions of
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+   the Minimal Corresponding Source and Corresponding Application
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+  5. Combined Libraries.
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+permanent authorization for you to choose that version for the
+Library.

cmake/CMakeLists.txt

@@ -1,6 +1,10 @@
 cmake_minimum_required (VERSION 2.6)
 project (IfcOpenShell)
 
+FIND_PACKAGE(Boost REQUIRED COMPONENTS program_options)
+MESSAGE(STATUS "Boost include files found in ${Boost_INCLUDE_DIRS}")
+MESSAGE(STATUS "Boost libraries found in ${Boost_LIBRARY_DIRS}")
+
 # Find Open CASCADE header files
 IF("$ENV{OCC_INCLUDE_DIR}" STREQUAL "") 
 	SET(OCC_INCLUDE_DIR "/usr/include/opencascade/" CACHE FILEPATH "Open CASCADE header files")
@@ -50,10 +54,39 @@ ENDIF()
 FIND_LIBRARY(icu "icuuc" /usr/lib /usr/lib64 /usr/local/lib /usr/local/lib64 ${ICU_LIBRARY_DIR})
 
 IF(icu)
-	MESSAGE(STATUS "ICU libraries found")
+    MESSAGE(STATUS "ICU libraries found")
     ADD_DEFINITIONS(-DHAVE_ICU)
 ELSE()
-	MESSAGE(STATUS "Unable to find ICU library files, continuing")	
+    MESSAGE(STATUS "Unable to find ICU library files, continuing")	
+ENDIF()
+
+IF("$ENV{OPENCOLLADA_INCLUDE_DIR}" STREQUAL "")
+    MESSAGE(STATUS "No OpenCOLLADA include directory specified")
+    SET(OPENCOLLADA_INCLUDE_DIR "/usr/local/include/opencollada" CACHE FILEPATH "OpenCOLLADA header files")
+ElSE()
+    SET(OPENCOLLADA_INCLUDE_DIR "$ENV{OPENCOLLADA_INCLUDE_DIR}" CACHE FILEPATH "OpenCOLLADA header files")
+ENDIF()
+
+IF("$ENV{OPENCOLLADA_LIBRARY_DIR}" STREQUAL "")
+    MESSAGE(STATUS "No OpenCOLLADA library directory specified")
+    SET(OPENCOLLADA_LIBRARY_DIR "/usr/local/lib/opencollada" CACHE FILEPATH "OpenCOLLADA library files")
+ElSE()
+    SET(OPENCOLLADA_LIBRARY_DIR "$ENV{OPENCOLLADA_LIBRARY_DIR}" CACHE FILEPATH "OpenCOLLADA library files")
+ENDIF()
+
+SET(OPENCOLLADA_INCLUDE_DIRS "${OPENCOLLADA_INCLUDE_DIR}/COLLADABaseUtils" "${OPENCOLLADA_INCLUDE_DIR}/COLLADAStreamWriter")
+
+FIND_FILE(COLLADASWStreamWriter_h "COLLADASWStreamWriter.h" ${OPENCOLLADA_INCLUDE_DIRS})
+IF(COLLADASWStreamWriter_h)
+    MESSAGE(STATUS "OpenCOLLADA header files found")
+    ADD_DEFINITIONS(-DWITH_OPENCOLLADA)
+    SET(OPENCOLLADA_LIBRARIES 
+        GeneratedSaxParser MathMLSolver OpenCOLLADABaseUtils
+        OpenCOLLADAFramework OpenCOLLADASaxFrameworkLoader
+        OpenCOLLADAStreamWriter UTF buffer ftoa pcre
+    )
+ELSE()
+    MESSAGE(STATUS "OpenCOLLADA header files not found, continuing without COLLADA support")
 ENDIF()
 
 INCLUDE(CheckIncludeFileCXX)
@@ -88,13 +121,22 @@ ElSE(MSVC)
     ADD_DEFINITIONS(-fPIC -Wno-non-virtual-dtor)
 ENDIF(MSVC)
 
-INCLUDE_DIRECTORIES(${OCC_INCLUDE_DIR} /usr/inc /usr/local/inc /usr/local/include/oce ${ICU_INCLUDE_DIR})
+INCLUDE_DIRECTORIES(${INCLUDE_DIRECTORIES} ${OCC_INCLUDE_DIR} ${OPENCOLLADA_INCLUDE_DIRS} /usr/inc /usr/local/inc /usr/local/include/oce ${ICU_INCLUDE_DIR} ${Boost_INCLUDE_DIRS})
 
-ADD_LIBRARY(IfcParse STATIC 
+ADD_LIBRARY(IfcParse STATIC
+  ../src/ifcparse/Ifc2x3-latebound.cpp
   ../src/ifcparse/Ifc2x3.cpp
-  ../src/ifcparse/IfcUtil.cpp
-  ../src/ifcparse/IfcParse.cpp
+  ../src/ifcparse/Ifc4-latebound.cpp
+  ../src/ifcparse/Ifc4.cpp
   ../src/ifcparse/IfcCharacterDecoder.cpp
+  ../src/ifcparse/IfcGuidHelper.cpp
+  ../src/ifcparse/IfcHierarchyHelper.cpp
+  ../src/ifcparse/IfcLateBoundEntity.cpp
+  ../src/ifcparse/IfcParse.cpp
+  ../src/ifcparse/IfcSIPrefix.cpp
+  ../src/ifcparse/IfcSpfHeader.cpp
+  ../src/ifcparse/IfcUtil.cpp
+  ../src/ifcparse/IfcWrite.cpp
 )
 
 ADD_LIBRARY(IfcGeom STATIC
@@ -102,7 +144,9 @@ ADD_LIBRARY(IfcGeom STATIC
   ../src/ifcgeom/IfcGeomFaces.cpp
   ../src/ifcgeom/IfcGeomFunctions.cpp
   ../src/ifcgeom/IfcGeomHelpers.cpp
-  ../src/ifcgeom/IfcGeomObjects.cpp
+  ../src/ifcgeom/IfcGeomMaterial.cpp
+  ../src/ifcgeom/IfcGeomRenderStyles.cpp
+  ../src/ifcgeom/IfcGeomRepresentation.cpp
   ../src/ifcgeom/IfcGeomShapes.cpp
   ../src/ifcgeom/IfcGeomWires.cpp
   ../src/ifcgeom/IfcRegister.cpp
@@ -114,11 +158,23 @@ ENDIF()
 
 TARGET_LINK_LIBRARIES(IfcGeom IfcParse)
 
-LINK_DIRECTORIES (${IfcOpenShell_BINARY_DIR} ${OCC_LIBRARY_DIR} /usr/lib /usr/lib64 /usr/local/lib /usr/local/lib64 ${ICU_LIBRARY_DIR}) 
+LINK_DIRECTORIES (${LINK_DIRECTORIES} ${IfcOpenShell_BINARY_DIR} ${OCC_LIBRARY_DIR} ${OPENCOLLADA_LIBRARY_DIR} /usr/lib /usr/lib64 /usr/local/lib /usr/local/lib64 ${ICU_LIBRARY_DIR} ${Boost_LIBRARY_DIRS}) 
 
-ADD_EXECUTABLE(IfcObj ../src/ifcobj/IfcObj.cpp)
+ADD_EXECUTABLE(IfcConvert
+    ../src/ifcconvert/ColladaSerializer.cpp
+    ../src/ifcconvert/IfcConvert.cpp
+    ../src/ifcconvert/OpenCascadeBasedSerializer.cpp
+    ../src/ifcconvert/WavefrontObjSerializer.cpp
+    ../src/ifcconvert/XmlSerializer.cpp
+)
 
-TARGET_LINK_LIBRARIES (IfcObj IfcParse IfcGeom TKernel TKMath TKBRep TKGeomBase TKGeomAlgo TKG3d TKG2d TKShHealing TKTopAlgo TKMesh TKPrim TKBool TKBO TKFillet)
+TARGET_LINK_LIBRARIES (IfcConvert IfcParse IfcGeom TKernel TKMath TKBRep TKGeomBase TKGeomAlgo TKG3d TKG2d TKShHealing TKTopAlgo TKMesh TKPrim TKBool TKBO TKFillet TKSTEP TKSTEPBase TKSTEPAttr TKXSBase TKSTEP209 TKIGES TKOffset ${Boost_LIBRARIES} ${OPENCOLLADA_LIBRARIES})
+
+ADD_EXECUTABLE(IfcGeomServer
+    ../src/ifcgeomserver/IfcGeomServer.cpp
+)
+
+TARGET_LINK_LIBRARIES (IfcGeomServer IfcParse IfcGeom TKernel TKMath TKBRep TKGeomBase TKGeomAlgo TKG3d TKG2d TKShHealing TKTopAlgo TKMesh TKPrim TKBool TKBO TKFillet TKSTEP TKSTEPBase TKSTEPAttr TKXSBase TKSTEP209 TKIGES TKOffset)
 
 # Build python wrapper using separate CMakeLists.txt
 ADD_SUBDIRECTORY(../src/ifcwrap ifcwrap)
@@ -126,10 +182,17 @@ ADD_SUBDIRECTORY(../src/ifcwrap ifcwrap)
 # Build IfcParseExamples using separate CMakeLists.txt
 ADD_SUBDIRECTORY(../src/examples examples)
 
+# ADD_SUBDIRECTORY(../src/qtviewer qtviewer)
+
 # CMake installation targets
 SET(include_files_geom
     ../src/ifcgeom/IfcGeom.h
-    ../src/ifcgeom/IfcGeomObjects.h
+    ../src/ifcgeom/IfcGeomElement.h
+    ../src/ifcgeom/IfcGeomIterator.h
+    ../src/ifcgeom/IfcGeomIteratorSettings.h
+    ../src/ifcgeom/IfcGeomMaterial.h
+    ../src/ifcgeom/IfcGeomRenderStyles.h
+    ../src/ifcgeom/IfcGeomRepresentation.h
     ../src/ifcgeom/IfcRegister.h
     ../src/ifcgeom/IfcRegisterConvertCurve.h
     ../src/ifcgeom/IfcRegisterConvertFace.h
@@ -142,19 +205,31 @@ SET(include_files_geom
     ../src/ifcgeom/IfcRegisterIsShapeCollection.h
     ../src/ifcgeom/IfcRegisterPurgeCache.h
     ../src/ifcgeom/IfcRegisterUndef.h
-    ../src/ifcgeom/IfcShapeList.h
+    ../src/ifcgeom/IfcRepresentationShapeItem.h
 )
 SET(include_files_parse
+    ../src/ifcparse/Ifc2x3-latebound.h
     ../src/ifcparse/Ifc2x3.h
     ../src/ifcparse/Ifc2x3enum.h
+    ../src/ifcparse/Ifc4-latebound.h
+    ../src/ifcparse/Ifc4.h
+    ../src/ifcparse/Ifc4enum.h
     ../src/ifcparse/IfcCharacterDecoder.h
+    ../src/ifcparse/IfcEntityDescriptor.h
     ../src/ifcparse/IfcException.h
     ../src/ifcparse/IfcFile.h
+    ../src/ifcparse/IfcHierarchyHelper.h
+    ../src/ifcparse/IfcLateBoundEntity.h
     ../src/ifcparse/IfcParse.h
+    ../src/ifcparse/IfcSIPrefix.h
+    ../src/ifcparse/IfcSpfHeader.h
+    ../src/ifcparse/IfcSpfStream.h
     ../src/ifcparse/IfcUtil.h
+    ../src/ifcparse/IfcWritableEntity.h
+    ../src/ifcparse/IfcWrite.h
     ../src/ifcparse/SharedPointer.h
 )
 INSTALL(FILES ${include_files_geom} DESTINATION include/ifcgeom)
 INSTALL(FILES ${include_files_parse} DESTINATION include/ifcparse)
-INSTALL(TARGETS IfcObj DESTINATION bin)
+INSTALL(TARGETS IfcConvert DESTINATION bin)
 INSTALL(TARGETS IfcParse IfcGeom DESTINATION lib)

src/examples/CMakeLists.txt

@@ -1,2 +1,5 @@
 ADD_EXECUTABLE(IfcParseExamples IfcParseExamples.cpp)
-TARGET_LINK_LIBRARIES (IfcParseExamples IfcParse)
+TARGET_LINK_LIBRARIES (IfcParseExamples IfcParse)
+
+ADD_EXECUTABLE(IfcOpenHouse IfcOpenHouse.cpp)
+TARGET_LINK_LIBRARIES (IfcOpenHouse IfcParse IfcGeom TKernel TKMath TKBRep TKGeomBase TKGeomAlgo TKG3d TKG2d TKShHealing TKTopAlgo TKMesh TKPrim TKBool TKBO TKFillet TKOffset)

src/examples/IfcOpenHouse.cpp

@@ -0,0 +1,533 @@
+/********************************************************************************
+ *                                                                              *
+ * This file is part of IfcOpenShell.                                           *
+ *                                                                              *
+ * IfcOpenShell is free software: you can redistribute it and/or modify         *
+ * it under the terms of the Lesser GNU General Public License as published by  *
+ * the Free Software Foundation, either version 3.0 of the License, or          *
+ * (at your option) any later version.                                          *
+ *                                                                              *
+ * IfcOpenShell is distributed in the hope that it will be useful,              *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of               *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                 *
+ * Lesser GNU General Public License for more details.                          *
+ *                                                                              *
+ * You should have received a copy of the Lesser GNU General Public License     *
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.         *
+ *                                                                              *
+ ********************************************************************************/
+
+#include <string>
+#include <iostream>
+#include <fstream>
+
+#include <TColgp_Array2OfPnt.hxx>
+#include <TColgp_Array1OfPnt.hxx>
+#include <TColStd_Array1OfReal.hxx>
+#include <TColStd_Array1OfInteger.hxx>
+
+#include <Geom_BSplineSurface.hxx>
+#include <BRepBuilderAPI_MakeFace.hxx>
+
+#include <Standard_Version.hxx>
+
+#ifdef USE_IFC4
+#include "../ifcparse/Ifc4.h"
+#else
+#include "../ifcparse/Ifc2x3.h"
+#endif
+
+#include "../ifcparse/IfcUtil.h"
+#include "../ifcparse/IfcHierarchyHelper.h"
+#include "../ifcgeom/IfcGeom.h"
+
+// Some convenience typedefs and definitions. 
+typedef std::string S;
+typedef IfcWrite::IfcGuidHelper guid;
+typedef std::pair<double, double> XY;
+boost::none_t const null = (static_cast<boost::none_t>(0));
+
+// The creation of Nurbs-surface for the IfcSite mesh, to be implemented lateron
+void createGroundShape(TopoDS_Shape& shape);
+
+int main(int argc, char** argv) {
+
+	// The IfcHierarchyHelper is a subclass of the regular IfcFile that provides several
+	// convenience functions for working with geometry in IFC files.
+	IfcHierarchyHelper file;
+	file.header().file_name().name("IfcOpenHouse.ifc");
+
+	// Start by adding a wall to the file, initially leaving most attributes blank.
+	IfcSchema::IfcWallStandardCase* south_wall = new IfcSchema::IfcWallStandardCase(
+		guid(), 			// GlobalId
+		0,	 				// OwnerHistory
+		S("South wall"), 	// Name
+		null, 				// Description
+		null, 				// ObjectType
+		null, 				// ObjectPlacement
+		null, 				// Representation
+		null				// Tag
+#ifdef USE_IFC4
+		, IfcSchema::IfcWallTypeEnum::IfcWallType_STANDARD
+#endif
+	);
+	file.addBuildingProduct(south_wall);
+
+	// By adding a wall, a hierarchy has been automatically created that consists of the following
+	// structure: IfcProject > IfcSite > IfcBuilding > IfcBuildingStorey > IfcWall
+
+	// Lateron changing the name of the IfcProject can be done by obtaining a reference to the 
+	// project, which has been created automatically.
+	file.getSingle<IfcSchema::IfcProject>()->Name(S("IfcOpenHouse"));
+
+	// An IfcOwnerHistory has been initialized as well, which should be assigned to the wall.
+	south_wall->OwnerHistory(file.getSingle<IfcSchema::IfcOwnerHistory>());
+
+	// The wall will be shaped as a box, with the dimensions specified in millimeters. The resulting
+	// product definition will consist of both a body representation as well as an axis representation
+	// that runs over the centerline of the box in the X-axis.
+	IfcSchema::IfcProductDefinitionShape* south_wall_shape = file.addAxisBox(10000, 360, 3000);
+
+	// Obtain a reference to the placement of the IfcBuildingStorey in order to create a hierarchy
+	// of placements for the products
+	IfcSchema::IfcObjectPlacement* storey_placement = *file.getSingle<IfcSchema::IfcBuildingStorey>()->ObjectPlacement();
+
+	// The shape has to be assigned to the representation of the wall and is placed at the origin
+	// of the coordinate system.
+	south_wall->Representation(south_wall_shape);
+	south_wall->ObjectPlacement(file.addLocalPlacement(storey_placement));
+
+	// A pale white colour is assigned to the wall.
+	IfcSchema::IfcPresentationStyleAssignment* wall_colour = file.setSurfaceColour(
+		south_wall_shape, 0.75, 0.73, 0.68);
+
+	// Now create a footing for the wall to rest on.
+	IfcSchema::IfcFooting* footing = new IfcSchema::IfcFooting(guid(), file.getSingle<IfcSchema::IfcOwnerHistory>(),
+		S("Footing"), null, null, null, null, null, IfcSchema::IfcFootingTypeEnum::IfcFootingType_STRIP_FOOTING);
+
+	file.addBuildingProduct(footing);
+
+	// The footing will span the entire floor plan of our building. The IfcRepresentationContext is
+	// something that has been created automatically as well, but representations could have been 
+	// assigned to a specific context, for example to add a two dimensional plan representation as well.
+	footing->Representation(file.addBox(10100, 5460, 2000));
+	footing->ObjectPlacement(file.addLocalPlacement(storey_placement, 0, 2500, -2000));
+	// The footing will have a dark gray colour
+	IfcSchema::IfcPresentationStyleAssignment* footing_colour = file.setSurfaceColour(*footing->Representation(), 0.26, 0.22, 0.18);
+
+	// IFC has two ways to apply boolean operations to geometry. IfcBooleanResults are commonly used 
+	// to clip geometry to a surface, for example to a slanted roof. For openings that are filled 
+	// with another element, for example a door or a window, an IfcOpeningElement is used instead.
+
+	// An opening element is created with rectangular geometry:
+	IfcSchema::IfcOpeningElement* west_opening = new IfcSchema::IfcOpeningElement(guid(), file.getSingle<IfcSchema::IfcOwnerHistory>(),
+		null, null, null, file.addLocalPlacement(*south_wall->ObjectPlacement(), -2500, 0, 400),
+		file.addBox(6000, 3630, 1600), null
+#ifdef USE_IFC4
+		, IfcSchema::IfcOpeningElementTypeEnum::IfcOpeningElementType_OPENING
+#endif
+	);
+	file.addEntity(west_opening);
+
+	// Relate the opening element to the wall.
+	IfcSchema::IfcRelVoidsElement* void_element = new IfcSchema::IfcRelVoidsElement(guid(), file.getSingle<IfcSchema::IfcOwnerHistory>(),
+		null, null, south_wall, west_opening);
+	file.addEntity(void_element);
+
+	// Now create an additional opening
+	IfcSchema::IfcOpeningElement* south_opening = new IfcSchema::IfcOpeningElement(guid(), file.getSingle<IfcSchema::IfcOwnerHistory>(),
+		null, null, null, file.addLocalPlacement(storey_placement, 3000, 0, 400),
+		file.addBox(1860, 3000, 1600), null
+#ifdef USE_IFC4
+		, IfcSchema::IfcOpeningElementTypeEnum::IfcOpeningElementType_OPENING
+#endif
+	);
+	file.addEntity(south_opening);
+	file.addEntity(new IfcSchema::IfcRelVoidsElement(guid(), file.getSingle<IfcSchema::IfcOwnerHistory>(), null, null, south_wall, south_opening));
+	
+	// Create a roof element that will consist of two slabs:
+	IfcSchema::IfcRoof* roof = new IfcSchema::IfcRoof(guid(), file.getSingle<IfcSchema::IfcOwnerHistory>(), S("Roof"), null, null,
+		file.addLocalPlacement(storey_placement), null, null, IfcSchema::IfcRoofTypeEnum::IfcRoofType_GABLE_ROOF);
+
+	// The roof geometry is slanted 45 degrees by specifying a direction for the box extrusion
+	IfcSchema::IfcShapeRepresentation* roof_rep = file.addEmptyRepresentation();
+	file.addBox(roof_rep, 10200, 360, sqrt(2.0*2900*2900), 0, file.addPlacement3d(0, 0, 0, 0, 1, 0),
+		file.addTriplet<IfcSchema::IfcDirection>(0, -sqrt(0.5), sqrt(0.5)));
+
+	// CV-2x3-144: Roofs are aggregates and shall have at least one contained element and no own geometry
+	IfcSchema::IfcSlab* south_roof_part = new IfcSchema::IfcSlab(guid(), file.getSingle<IfcSchema::IfcOwnerHistory>(), S("South roof"), 
+		null, null, null, null, null, IfcSchema::IfcSlabTypeEnum::IfcSlabType_ROOF);
+	
+	// The geometry is instantiated by using IfcMappedItems. This way geometry definitions can
+	// be reused while maintaining the cardinality constraint that the ShapeOfProduct relation
+	// imposes on the IfcProductDefinitionShape. Note that this constrained is lifted in IFC4.
+	south_roof_part->Representation(file.addMappedItem(roof_rep));
+	south_roof_part->ObjectPlacement(file.addLocalPlacement(*roof->ObjectPlacement(), 0, -400, 2700));
+	
+	// The same roof geometry is re-used on the north side of the roof, by inverting the X-axis of
+	// the local placement the roof is rotated 180 degrees around the Z-axis
+	IfcSchema::IfcSlab* north_roof_part = new IfcSchema::IfcSlab(guid(), file.getSingle<IfcSchema::IfcOwnerHistory>(), S("North roof"),
+		null, null, null, null, null, IfcSchema::IfcSlabTypeEnum::IfcSlabType_ROOF);
+	north_roof_part->OwnerHistory(file.getSingle<IfcSchema::IfcOwnerHistory>());
+	north_roof_part->Representation(file.addMappedItem(roof_rep));
+	north_roof_part->ObjectPlacement(file.addLocalPlacement(*roof->ObjectPlacement(), 0, 5400, 2700, 0, 0, 1, -1, 0, 0));
+	
+	IfcSchema::IfcObjectDefinition::list::ptr roof_parts(new IfcSchema::IfcObjectDefinition::list);
+	roof_parts->push(south_roof_part);
+	roof_parts->push(north_roof_part);
+	IfcSchema::IfcRelDecomposes* roof_decomposition = new IfcSchema::IfcRelAggregates(guid(), file.getSingle<IfcSchema::IfcOwnerHistory>(),
+			null, null, roof, roof_parts);
+	file.addEntity(roof_decomposition);
+
+	file.addBuildingProduct(south_roof_part);
+	file.addBuildingProduct(north_roof_part);
+	file.addBuildingProduct(roof);
+
+	file.setSurfaceColour(roof_rep, 0.24, 0.08, 0.04);
+
+	// Copy the south wall to the north
+	IfcSchema::IfcWallStandardCase* north_wall = new IfcSchema::IfcWallStandardCase(guid(), file.getSingle<IfcSchema::IfcOwnerHistory>(), S("North wall"),
+		null, null, file.addLocalPlacement(storey_placement, 0, 5000, 0), file.addAxisBox(10000, 360, 3000), null
+#ifdef USE_IFC4
+		, IfcSchema::IfcWallTypeEnum::IfcWallType_STANDARD
+#endif	
+	);
+	file.addBuildingProduct(north_wall);
+	file.setSurfaceColour(*north_wall->Representation(), wall_colour);
+
+	IfcSchema::IfcShapeRepresentation* clipped_wall_body_rep = file.addEmptyRepresentation();
+	file.addBox(clipped_wall_body_rep, 5000, 360, 6000);
+	// The east wall geometry is clipped using two IfcHalfSpaceSolids, created from an 
+	// 'axis 3d placement' that specifies the plane against which the geometry is clipped.
+	file.clipRepresentation(clipped_wall_body_rep, file.addPlacement3d(-2500, 0, 3000, -1, 0, 1), false);
+	file.clipRepresentation(clipped_wall_body_rep, file.addPlacement3d(2500, 0, 3000, 1, 0, 1), false);
+
+	// Now create a wall on the east of the building, again starting with just a box shape
+	IfcSchema::IfcWallStandardCase* east_wall = new IfcSchema::IfcWallStandardCase(guid(), file.getSingle<IfcSchema::IfcOwnerHistory>(),
+		S("East wall"), null, null, file.addLocalPlacement(storey_placement, 4820, 2500, 0, 0, 0, 1, 0, 1, 0), file.addMappedItem(clipped_wall_body_rep), null
+#ifdef USE_IFC4
+		, IfcSchema::IfcWallTypeEnum::IfcWallType_STANDARD
+#endif	
+	);
+	file.addBuildingProduct(east_wall);
+
+	file.setSurfaceColour(clipped_wall_body_rep, wall_colour);
+
+	// The east wall is copied to the west location of the house
+	IfcSchema::IfcWallStandardCase* west_wall = new IfcSchema::IfcWallStandardCase(guid(), file.getSingle<IfcSchema::IfcOwnerHistory>(),
+		S("West wall"), null, null, file.addLocalPlacement(storey_placement, -4820, 2500, 0, 0, 0, 1, 0, -1, 0), file.addMappedItem(clipped_wall_body_rep), null
+#ifdef USE_IFC4
+		, IfcSchema::IfcWallTypeEnum::IfcWallType_STANDARD
+#endif	
+	);
+	file.addBuildingProduct(west_wall);
+
+	for (int i = 0; i < 2; ++i) {
+		// CV-2x3-161: MappedItems are not allowed for Axis representations
+		IfcSchema::IfcWallStandardCase* wall = i == 0 ? east_wall : west_wall;
+		IfcSchema::IfcShapeRepresentation* wall_axis_rep = file.addEmptyRepresentation("Axis", "Curve2D");
+		file.addAxis(wall_axis_rep, 5000);
+		IfcSchema::IfcRepresentation::list::ptr reps = wall->Representation().get()->Representations();
+		reps->push(wall_axis_rep);
+		wall->Representation().get()->Representations(reps);
+	}
+
+	// The west wall is assigned an opening element we created for the south wall, opening elements are
+	// not shared accross building elements, even if they share the same representation. Hence, the east
+	// wall will not feature this opening.
+	// NB: an Opening Element can only be used to create a single void within a single Element, as per:
+	// http://www.buildingsmart-tech.org/ifc/IFC2x3/TC1/html/ifcproductextension/lexical/ifcfeatureelementsubtraction.htm
+
+	// Not all viewers support opening elements with mapped representations, hence an exact copy of the
+	// same subtraction box is instantiated for the otherwise identical opening element.
+	IfcSchema::IfcOpeningElement* west_opening_copy = new IfcSchema::IfcOpeningElement(guid(), file.getSingle<IfcSchema::IfcOwnerHistory>(),
+		null, null, null, file.addLocalPlacement(*west_wall->ObjectPlacement(), 2500, -2500+4820, 400, 0, 0, 1, 0, 1, 0),
+		file.addBox(6000, 3630, 1600), null
+#ifdef USE_IFC4
+		, IfcSchema::IfcOpeningElementTypeEnum::IfcOpeningElementType_OPENING
+#endif	
+	);
+	file.addEntity(west_opening_copy);
+	file.addEntity(new IfcSchema::IfcRelVoidsElement(guid(), file.getSingle<IfcSchema::IfcOwnerHistory>(), null, null, west_wall, west_opening_copy));
+	
+	// Up until now we have only used simple extrusions for the creation of the geometry. For the 
+	// ground mesh of the IfcSite we will use a Nurbs surface created in Open Cascade. The surface 
+	// will be tesselated using the deflection specified.
+	TopoDS_Shape shape;
+	createGroundShape(shape);
+	IfcEntityList::ptr geometrical_entities(new IfcEntityList);
+	IfcSchema::IfcProductDefinitionShape* ground_representation = IfcGeom::tesselate(shape, 100., geometrical_entities);
+	file.getSingle<IfcSchema::IfcSite>()->Representation(ground_representation);
+	file.addEntities(geometrical_entities);
+	IfcSchema::IfcShapeRepresentation::list::ptr ground_reps = geometrical_entities->as<IfcSchema::IfcShapeRepresentation>();
+	for (IfcSchema::IfcShapeRepresentation::list::it it = ground_reps->begin(); it != ground_reps->end(); ++it) {
+		(*it)->ContextOfItems(file.getRepresentationContext("Model"));
+	}
+	file.setSurfaceColour(ground_representation, 0.15, 0.25, 0.05);
+
+	// According to the Ifc2x3 schema an IfcWallStandardCase needs to have an IfcMaterialLayerSet
+	// assigned. Note that this material definition is independent of the surface styles we have 
+	// been assigning to the walls already. The surface styles determine the colour in the 
+	// '3D viewport' of most applications.
+	// Some BIM authoring applications, such as Autodesk Revit, ignore the geometrical representation
+	// by and large and construct native walls using the layer thickness and reference line offset 
+	// provided here.
+#ifdef USE_IFC4
+	IfcSchema::IfcMaterial* material = new IfcSchema::IfcMaterial("Brick", null, null);
+#else
+	IfcSchema::IfcMaterial* material = new IfcSchema::IfcMaterial("Brick");
+#endif
+	IfcSchema::IfcMaterialLayer* layer = new IfcSchema::IfcMaterialLayer(
+		material, 
+		360, 
+		null
+#ifdef USE_IFC4
+		, null
+		, null 
+		, null
+		, null
+#endif
+	);
+	IfcSchema::IfcMaterialLayer::list::ptr layers (new IfcTemplatedEntityList<IfcSchema::IfcMaterialLayer>());
+	layers->push(layer);
+	IfcSchema::IfcMaterialLayerSet* layer_set = new IfcSchema::IfcMaterialLayerSet(
+		layers, 
+		S("Wall")
+#ifdef USE_IFC4
+		, null
+#endif
+	);
+	IfcSchema::IfcMaterialLayerSetUsage* layer_usage = new IfcSchema::IfcMaterialLayerSetUsage(
+		layer_set,
+		IfcSchema::IfcLayerSetDirectionEnum::IfcLayerSetDirection_AXIS2,
+		IfcSchema::IfcDirectionSenseEnum::IfcDirectionSense_POSITIVE,
+		-180
+#ifdef USE_IFC4
+		, null
+#endif
+	);
+
+	IfcSchema::IfcRelAssociatesMaterial* associates_material = new IfcSchema::IfcRelAssociatesMaterial(
+		guid(),
+		file.getSingle<IfcSchema::IfcOwnerHistory>(), 
+		null, 
+		null,
+#ifdef USE_IFC4
+		file.entitiesByType<IfcSchema::IfcWallStandardCase>()->generalize(),
+#else
+		file.entitiesByType<IfcSchema::IfcWallStandardCase>()->as<IfcSchema::IfcRoot>(),
+#endif
+		layer_usage);
+
+	file.addEntity(material);
+	file.addEntity(layer);
+	file.addEntity(layer_set);	
+	file.addEntity(layer_usage);
+	file.addEntity(associates_material);
+
+	// In addition, another common way to represent geometry in IFC files is to use extrusions of
+	// planar areas bounded by a polygon.
+	std::vector<XY> stair_points;
+	stair_points.push_back(XY(  0,  0));
+	stair_points.push_back(XY(250,  0));
+	stair_points.push_back(XY(250, 200));
+	stair_points.push_back(XY(500, 200));
+	stair_points.push_back(XY(500, 400));
+	stair_points.push_back(XY(  0, 400));
+	IfcSchema::IfcStairFlight* stair = new IfcSchema::IfcStairFlight(guid(), file.getSingle<IfcSchema::IfcOwnerHistory>(),
+		null, null, null, file.addLocalPlacement(storey_placement, 5050, 1000, 0, 0, 1, 0, 1, 0, 0),
+		file.addExtrudedPolyline(stair_points, 1200), null, 2, 2, 0.2, 0.25
+#ifdef USE_IFC4
+		, IfcSchema::IfcStairFlightTypeEnum::IfcStairFlightType_STRAIGHT
+#endif
+	);
+
+	file.addBuildingProduct(stair);
+	file.setSurfaceColour(*stair->Representation(), footing_colour);
+
+	IfcSchema::IfcOpeningElement* door_opening = new IfcSchema::IfcOpeningElement(guid(), file.getSingle<IfcSchema::IfcOwnerHistory>(),
+		null, null, null, file.addLocalPlacement(storey_placement, 5000-180, 2500-900, 0), file.addBox(1000, 1000, 2200), null
+#ifdef USE_IFC4
+		, IfcSchema::IfcOpeningElementTypeEnum::IfcOpeningElementType_OPENING
+#endif	
+	);
+	file.addEntity(door_opening);
+	file.addEntity(new IfcSchema::IfcRelVoidsElement(guid(), file.getSingle<IfcSchema::IfcOwnerHistory>(), null, null, east_wall, door_opening));
+
+	// A single shape representation can contain multiple representiation items. This way a product
+	// can be a composition of multiple solids. The following door will be composed of four boxes
+	// which constitute the door and its frame.
+	IfcSchema::IfcDoor* door = new IfcSchema::IfcDoor(guid(), file.getSingle<IfcSchema::IfcOwnerHistory>(), null, null, null,
+		file.addLocalPlacement(storey_placement, 4800, 1600, 0, 0, 0, 1, 0, 1, 0), null, null, 2200, 1000
+#ifdef USE_IFC4
+		, IfcSchema::IfcDoorTypeEnum::IfcDoorType_DOOR
+		, IfcSchema::IfcDoorTypeOperationEnum::IfcDoorTypeOperation_SINGLE_SWING_LEFT
+		, null
+#endif
+	);
+	door->Representation(file.addBox(80, 80, 2120, 0, file.addPlacement3d(460, 0, 0)));
+	IfcSchema::IfcRepresentation::list::ptr door_representations = door->Representation().get()->Representations();
+	IfcSchema::IfcShapeRepresentation* door_body = 0;
+	for (IfcSchema::IfcRepresentation::list::it i = door_representations->begin(); i != door_representations->end(); ++i) {
+		IfcSchema::IfcRepresentation* rep = *i;
+		if (rep->is(IfcSchema::Type::IfcShapeRepresentation) && *rep->RepresentationIdentifier() == "Body") {
+			door_body = (IfcSchema::IfcShapeRepresentation*) rep;
+		}
+	}
+	file.addBox(door_body,  80, 80, 2120, 0, file.addPlacement3d(-460, 0,   0));
+	file.addBox(door_body, 1000, 80,  80, 0, file.addPlacement3d(   0, 0, 2120));
+	file.addBox(door_body, 860, 30, 2120);
+	file.addBuildingProduct(door);
+	file.setSurfaceColour(*door->Representation(), 0.9, 0.9, 0.9);
+	file.addEntity(new IfcSchema::IfcRelFillsElement(guid(), file.getSingle<IfcSchema::IfcOwnerHistory>(), null, null, door_opening, door));
+
+	// Surface styles are assigned to representation items, hence there is no real limitation to
+	// assign different colours within the same representation. However, some viewers have 
+	// difficulties rendering products with representation items with different surface styles. 
+	// Therefore we will construct the window as a decomposition of beams and a plate, in which 
+	// only the plate will have a transparent material assigned.
+
+	// The window frame will consists of four seperate beams.
+	// AutoCAD Architecture will create an internal window type for the IfcWindow created.
+	// Therefore the OverallWidth and OverallHeight of the window attributes will need to
+	// match the bounding box of the representation. Furthermore, the window placement needs
+	// to align with the lowerleft corner of the constituent parts.
+	IfcSchema::IfcShapeRepresentation::list::ptr frame_representations(new IfcSchema::IfcShapeRepresentation::list);
+	
+	IfcSchema::IfcShapeRepresentation* horizontal_bar = file.addEmptyRepresentation();
+	IfcSchema::IfcShapeRepresentation* vertical_bar = file.addEmptyRepresentation();
+	file.addBox(horizontal_bar, 1860, 90, 90);
+	file.addBox(vertical_bar, 90, 90, 1420);
+
+	frame_representations->push(horizontal_bar);
+	frame_representations->push(horizontal_bar); // Add another reference to the horizontal bar created above
+	frame_representations->push(vertical_bar);
+	frame_representations->push(vertical_bar); // Add another reference to the vertical bar created above
+
+	// The beams all have the same surface style assigned
+	IfcSchema::IfcPresentationStyleAssignment* frame_style = 0;
+	for (IfcSchema::IfcShapeRepresentation::list::it i = frame_representations->begin(); i != frame_representations->end(); i += 2) {
+		if (frame_style) {
+			file.setSurfaceColour(*i, frame_style);
+		} else {
+			frame_style = file.setSurfaceColour(*i, 0.5, 0.4, 0.3);
+		}
+		// Because of the duplication the iterator is incremented twice
+	}
+
+	// This window will be placed at five locations within the building. A list of placements is 
+	// created and is iterated over to create all window instances.
+	IfcSchema::IfcLocalPlacement::list::ptr window_placements (new IfcSchema::IfcLocalPlacement::list);
+	window_placements->push(file.addLocalPlacement(storey_placement, 2*-1770-430-930,   -45, 400));
+	window_placements->push(file.addLocalPlacement(storey_placement,   -1770-430-930,   -45, 400));
+	window_placements->push(file.addLocalPlacement(storey_placement,        -430-930,   -45, 400));
+	window_placements->push(file.addLocalPlacement(storey_placement,        3000-930,   -45, 400));
+	window_placements->push(file.addLocalPlacement(storey_placement, -4855+45, 885-930, 400, 0, 0, 1, 0, 1, 0));
+	
+	for (IfcSchema::IfcLocalPlacement::list::it it = window_placements->begin(); it != window_placements->end(); ++it) {
+		
+		// Create the window at the current location
+		IfcSchema::IfcLocalPlacement* place = *it;
+		IfcSchema::IfcWindow* window = new IfcSchema::IfcWindow(guid(), file.getSingle<IfcSchema::IfcOwnerHistory>(),
+			null, null, null, place, null, null, 1600, 1860
+#ifdef USE_IFC4
+			, IfcSchema::IfcWindowTypeEnum::IfcWindowType_WINDOW
+			, IfcSchema::IfcWindowTypePartitioningEnum::IfcWindowTypePartitioning_SINGLE_PANEL
+			, null
+#endif
+	);
+		file.addBuildingProduct(window);		
+
+		// Initalize a list of parts for the window to be composed of
+		IfcSchema::IfcObjectDefinition::list::ptr window_parts(new IfcTemplatedEntityList<IfcSchema::IfcObjectDefinition>());
+
+		// The placements for the beams are not shared accross the different windows because every
+		// beam is placed relative to its parent window entity.
+		IfcSchema::IfcLocalPlacement::list::ptr frame_placements (new IfcTemplatedEntityList<IfcSchema::IfcLocalPlacement>());
+		frame_placements->push(file.addLocalPlacement(storey_placement,  930,45));
+		frame_placements->push(file.addLocalPlacement(storey_placement,  930, 45, 1510));
+		frame_placements->push(file.addLocalPlacement(storey_placement, -885+930, 45,  90));
+		frame_placements->push(file.addLocalPlacement(storey_placement,  885+930, 45,  90));
+		
+		// Now iterate over the placements and representations of the beam and add them to list of parts
+		IfcSchema::IfcLocalPlacement::list::it frame_placement;
+		IfcSchema::IfcShapeRepresentation::list::it frame_representation;
+		for (frame_placement = frame_placements->begin(), frame_representation = frame_representations->begin();
+			frame_placement != frame_placements->end() && frame_representation != frame_representations->end();
+			++frame_placement, ++frame_representation)
+		{
+			IfcSchema::IfcMember* frame_part = new IfcSchema::IfcMember(guid(), file.getSingle<IfcSchema::IfcOwnerHistory>(),
+				null, null, null, *frame_placement, file.addMappedItem(*frame_representation), null
+#ifdef USE_IFC4
+				, IfcSchema::IfcMemberTypeEnum::IfcMemberType_MULLION
+#endif
+			);
+			file.addEntity(frame_part);
+			window_parts->push(frame_part);
+			file.relatePlacements(window, frame_part);
+		}
+
+		// Add the glass plate to the list of parts
+		IfcSchema::IfcPlate* glass_part = new IfcSchema::IfcPlate(guid(), file.getSingle<IfcSchema::IfcOwnerHistory>(), null,
+			null, null, file.addLocalPlacement(storey_placement, 930, 45, 90), file.addBox(1680, 10, 1420), null
+#ifdef USE_IFC4
+			, IfcSchema::IfcPlateTypeEnum::IfcPlateType_SHEET
+#endif
+		);
+		file.addEntity(glass_part);
+		window_parts->push(glass_part);
+		file.relatePlacements(window, glass_part);
+		file.setSurfaceColour(*glass_part->Representation(), 0.6, 0.7, 0.75, 0.1);
+		
+		// Now create a decomposition relation between the window and the parts. Most viewers and authoring
+		// tools will consider the window a single entity that can be selected as a whole.
+		IfcSchema::IfcRelDecomposes* decomposition = new IfcSchema::IfcRelAggregates(guid(), file.getSingle<IfcSchema::IfcOwnerHistory>(),
+			null, null, window, window_parts);
+		file.addEntity(decomposition);		
+	}
+
+	// Finally create a file stream for our output and write the IFC file to it.
+	std::ofstream f("IfcOpenHouse.ifc");
+	f << file;
+}
+
+void createGroundShape(TopoDS_Shape& shape) {
+	TColgp_Array2OfPnt cv (0, 4, 0, 4);
+	cv.SetValue(0, 0, gp_Pnt(-10000, -10000, -4130));
+	cv.SetValue(0, 1, gp_Pnt(-10000,  -4330, -4130));
+	cv.SetValue(0, 2, gp_Pnt(-10000,      0, -5130));
+	cv.SetValue(0, 3, gp_Pnt(-10000,   4330, -7130));
+	cv.SetValue(0, 4, gp_Pnt(-10000,  10000, -7130));
+	cv.SetValue(1, 0, gp_Pnt( -3330, -10000, -5130));
+	cv.SetValue(1, 1, gp_Pnt( -7670,  -3670,  5000));
+	cv.SetValue(1, 2, gp_Pnt( -9000,      0,  1000));
+	cv.SetValue(1, 3, gp_Pnt( -7670,   7670,  6000));
+	cv.SetValue(1, 4, gp_Pnt( -3330,  10000, -4130));
+	cv.SetValue(2, 0, gp_Pnt(     0, -10000, -5530));
+	cv.SetValue(2, 1, gp_Pnt(     0,  -3670,  3000));
+	cv.SetValue(2, 2, gp_Pnt(     0,      0, -12000));
+	cv.SetValue(2, 3, gp_Pnt(     0,   7670,  1500));
+	cv.SetValue(2, 4, gp_Pnt(     0,  10000, -4130));
+	cv.SetValue(3, 0, gp_Pnt(  3330, -10000, -6130));
+	cv.SetValue(3, 1, gp_Pnt(  7670,  -3670,  6000));
+	cv.SetValue(3, 2, gp_Pnt(  9000,      0,  5000));
+	cv.SetValue(3, 3, gp_Pnt(  7670,   9000,  7000));
+	cv.SetValue(3, 4, gp_Pnt(  3330,  10000, -4130));
+	cv.SetValue(4, 0, gp_Pnt( 10000, -10000, -6130));
+	cv.SetValue(4, 1, gp_Pnt( 10000,  -4330, -5130));
+	cv.SetValue(4, 2, gp_Pnt( 10000,      0, -4130));
+	cv.SetValue(4, 3, gp_Pnt( 10000,   4330, -4130));
+	cv.SetValue(4, 4, gp_Pnt( 10000,  10000, -8130));
+	TColStd_Array1OfReal knots(0, 1);
+	knots(0) = 0;
+	knots(1) = 1;		
+	TColStd_Array1OfInteger mult(0, 1);
+	mult(0) = 5;
+	mult(1) = 5;	
+	Handle(Geom_BSplineSurface) surf = new Geom_BSplineSurface(cv, knots, knots, mult, mult, 4, 4);
+#if OCC_VERSION_HEX < 0x60502
+	shape = BRepBuilderAPI_MakeFace(surf);
+#else
+	shape = BRepBuilderAPI_MakeFace(surf, Precision::Confusion());
+#endif
+}

src/examples/IfcParseExamples.cpp

@@ -1,4 +1,4 @@
-/********************************************************************************
+/********************************************************************************
  *                                                                              *
  * This file is part of IfcOpenShell.                                           *
  *                                                                              *
@@ -17,9 +17,9 @@
  *                                                                              *
  ********************************************************************************/
 
-#include "../ifcparse/IfcParse.h"
+#include "../ifcparse/IfcFile.h"
 
-using namespace Ifc2x3;
+using namespace IfcSchema;
 
 int main(int argc, char** argv) {
 
@@ -29,17 +29,18 @@ int main(int argc, char** argv) {
 	}
 
 	// Redirect the output (both progress and log) to stdout
-	Ifc::SetOutput(&std::cout,&std::cout);
+	Logger::SetOutput(&std::cout,&std::cout);
 
 	// Parse the IFC file provided in argv[1]
-	if ( ! Ifc::Init(argv[1]) ) {
+	IfcParse::IfcFile file;
+	if ( ! file.Init(argv[1]) ) {
 		std::cout << "Unable to parse .ifc file" << std::endl;
 		return 1;
 	}
 
 	// Lets get a list of IfcBuildingElements, this is the parent
 	// type of things like walls, windows and doors.
-	// EntitiesByType is a templated function and returns a
+	// entitiesByType is a templated function and returns a
 	// templated class that behaves like a std::vector.
 	// Note that the return types are all typedef'ed as members of
 	// the generated classes, ::list for the templated vector class,
@@ -53,26 +54,21 @@ int main(int argc, char** argv) {
 	// we need to cast them to IfcWindows. Since these properties 
 	// are optional we need to make sure the properties are 
 	// defined for the window in question before accessing them.
-	//
-	// Since we are accessing properties that represent a length
-	// measure we can multiply the value by Ifc::LengthUnit, which
-	// contains the ratio of the unit defined in the IfcUnitAssignment
-	// to the standard SI Unit, the meter.
-	IfcBuildingElement::list elements = Ifc::EntitiesByType<IfcBuildingElement>();
+	IfcBuildingElement::list::ptr elements = file.entitiesByType<IfcBuildingElement>();
 
-	std::cout << "Found " << elements->Size() << " elements in " << argv[1] << ":" << std::endl;
+	std::cout << "Found " << elements->size() << " elements in " << argv[1] << ":" << std::endl;
 	
-	for ( IfcBuildingElement::it it = elements->begin(); it != elements->end(); ++ it ) {
+	for ( IfcBuildingElement::list::it it = elements->begin(); it != elements->end(); ++ it ) {
 		
-		const IfcBuildingElement::ptr element = *it;
+		const IfcBuildingElement* element = *it;
 		std::cout << element->entity->toString() << std::endl;
 		
 		if ( element->is(IfcWindow::Class()) ) {
-			const IfcWindow::ptr window = reinterpret_pointer_cast<IfcBuildingElement,IfcWindow>(element);
+			const IfcWindow* window = (IfcWindow*)element;
 			
-			if ( window->hasOverallWidth() && window->hasOverallHeight() ) {
-				const float area = window->OverallWidth()*window->OverallHeight() * (Ifc::LengthUnit*Ifc::LengthUnit);
-				std::cout << "This window has an area of " << area << "m2" << std::endl;
+			if ( window->OverallWidth() && window->OverallHeight() ) {
+				const double area = window->OverallWidth().get() * window->OverallHeight().get();
+				std::cout << "The area of this window is " << area << std::endl;
 			}
 		}
 

src/examples/arbitrary_open_profile_def.cpp

@@ -0,0 +1,140 @@
+/********************************************************************************
+ *                                                                              *
+ * This file is part of IfcOpenShell.                                           *
+ *                                                                              *
+ * IfcOpenShell is free software: you can redistribute it and/or modify         *
+ * it under the terms of the Lesser GNU General Public License as published by  *
+ * the Free Software Foundation, either version 3.0 of the License, or          *
+ * (at your option) any later version.                                          *
+ *                                                                              *
+ * IfcOpenShell is distributed in the hope that it will be useful,              *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of               *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                 *
+ * Lesser GNU General Public License for more details.                          *
+ *                                                                              *
+ * You should have received a copy of the Lesser GNU General Public License     *
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.         *
+ *                                                                              *
+ ********************************************************************************/
+
+/********************************************************************************
+ *                                                                              *
+ * Example that generates various representations from                          *
+ * IfcArbitraryOpenProfileDefs and its subclass IfcCenterLineProfileDef         *
+ *                                                                              *
+ ********************************************************************************/
+
+#include <string>
+#include <iostream>
+#include <fstream>
+
+#include "../ifcparse/Ifc2x3.h"
+#include "../ifcparse/IfcUtil.h"
+#include "../ifcparse/IfcHierarchyHelper.h"
+
+typedef std::string S;
+typedef IfcWrite::IfcGuidHelper guid;
+boost::none_t const null = (static_cast<boost::none_t>(0));
+static int i = 0;
+
+void create_product_from_item(IfcHierarchyHelper& file, IfcSchema::IfcRepresentationItem* item, const std::string& s) {
+	IfcSchema::IfcBuildingElementProxy* product = new IfcSchema::IfcBuildingElementProxy(
+		guid(), 0, S("product"), null, null, 0, 0, null, null);
+	file.addBuildingProduct(product);
+	product->setOwnerHistory(file.getSingle<IfcSchema::IfcOwnerHistory>());
+
+	product->setObjectPlacement(file.addLocalPlacement(120 * i++));
+
+	IfcSchema::IfcRepresentation::list reps (new IfcTemplatedEntityList<IfcSchema::IfcRepresentation>());
+	IfcSchema::IfcRepresentationItem::list items (new IfcTemplatedEntityList<IfcSchema::IfcRepresentationItem>());
+	items->push(item);
+
+	if (s == "GeometricSet") {
+		IfcSchema::IfcGeometricSet* set = new IfcSchema::IfcGeometricSet(items->generalize());
+		file.addEntity(set);
+		items = IfcSchema::IfcRepresentationItem::list(new IfcTemplatedEntityList<IfcSchema::IfcRepresentationItem>());
+		items->push(set);
+	}
+		
+	IfcSchema::IfcShapeRepresentation* rep = new IfcSchema::IfcShapeRepresentation(
+		file.getSingle<IfcSchema::IfcRepresentationContext>(), S("Body"), s, items);
+	reps->push(rep);
+
+	IfcSchema::IfcProductDefinitionShape* shape = new IfcSchema::IfcProductDefinitionShape(0, 0, reps);
+	file.addEntity(rep);
+	file.addEntity(shape);
+		
+	product->setRepresentation(shape);
+}
+
+void create_surfaces_from_profile(IfcHierarchyHelper& file, IfcSchema::IfcProfileDef* profile) {
+	IfcSchema::IfcSurfaceOfLinearExtrusion* extrusion = new IfcSchema::IfcSurfaceOfLinearExtrusion(profile, file.addPlacement3d(), file.addTriplet<IfcSchema::IfcDirection>(0, 0, 1), 100.);
+	file.addEntity(extrusion);
+
+	IfcSchema::IfcAxis1Placement* ax1 = new IfcSchema::IfcAxis1Placement(file.addTriplet<IfcSchema::IfcCartesianPoint>(0,100,0), file.addTriplet<IfcSchema::IfcDirection>(1,0,0));
+	IfcSchema::IfcSurfaceOfRevolution* revolution = new IfcSchema::IfcSurfaceOfRevolution(profile, file.addPlacement3d(), ax1);
+	file.addEntity(ax1);
+	file.addEntity(revolution);
+
+	create_product_from_item(file, extrusion, "GeometricSet");
+	create_product_from_item(file, revolution, "GeometricSet");
+}
+
+void create_solids_from_profile(IfcHierarchyHelper& file, IfcSchema::IfcProfileDef* profile) {
+	IfcSchema::IfcExtrudedAreaSolid* extrusion = new IfcSchema::IfcExtrudedAreaSolid(profile, file.addPlacement3d(), file.addTriplet<IfcSchema::IfcDirection>(0, 0, 1), 100.);
+	file.addEntity(extrusion);
+
+	IfcSchema::IfcAxis1Placement* ax1 = new IfcSchema::IfcAxis1Placement(file.addTriplet<IfcSchema::IfcCartesianPoint>(0,100,0), file.addTriplet<IfcSchema::IfcDirection>(1,0,0));
+	IfcSchema::IfcRevolvedAreaSolid* revolution1 = new IfcSchema::IfcRevolvedAreaSolid(profile, file.addPlacement3d(), ax1, 360.);
+	IfcSchema::IfcRevolvedAreaSolid* revolution2 = new IfcSchema::IfcRevolvedAreaSolid(profile, file.addPlacement3d(), ax1, 90.);
+	file.addEntity(ax1);
+	file.addEntity(revolution1);
+	file.addEntity(revolution2);
+
+	create_product_from_item(file, extrusion, "SweptSolid");
+	create_product_from_item(file, revolution1, "SweptSolid");
+	create_product_from_item(file, revolution2, "SweptSolid");
+}
+
+void create_products_from_curve(IfcHierarchyHelper& file, IfcSchema::IfcBoundedCurve* curve) {
+	IfcSchema::IfcArbitraryOpenProfileDef* open = new IfcSchema::IfcArbitraryOpenProfileDef(IfcSchema::IfcProfileTypeEnum::IfcProfileType_CURVE, null, curve);
+	IfcSchema::IfcCenterLineProfileDef* center_line = new IfcSchema::IfcCenterLineProfileDef(IfcSchema::IfcProfileTypeEnum::IfcProfileType_AREA, null, curve, 10.);
+	file.addEntity(open);
+	file.addEntity(center_line);
+
+	create_surfaces_from_profile(file, open);
+	create_solids_from_profile(file, center_line);
+}
+
+int main(int argc, char** argv) {
+	const char filename[] = "IfcArbitraryOpenProfileDef.ifc";
+	IfcHierarchyHelper file;
+	file.filename(filename);
+
+	double coords1[] = {-50.0, 0.0};
+	double coords2[] = { 50.0, 0.0};
+	IfcSchema::IfcCartesianPoint::list points (new IfcTemplatedEntityList<IfcSchema::IfcCartesianPoint>());
+	points->push(new IfcSchema::IfcCartesianPoint(std::vector<double>(coords1, coords1+2)));
+	points->push(new IfcSchema::IfcCartesianPoint(std::vector<double>(coords2, coords2+2)));
+	file.addEntities(points->generalize());
+	IfcSchema::IfcPolyline* poly = new IfcSchema::IfcPolyline(points);
+	file.addEntity(poly);
+
+	create_products_from_curve(file, poly);
+
+	IfcSchema::IfcEllipse* ellipse = new IfcSchema::IfcEllipse(file.addPlacement2d(), 50., 25.);
+	file.addEntity(ellipse);
+	IfcEntityList::ptr trim1(new IfcEntityList);
+	IfcEntityList::ptr trim2(new IfcEntityList);
+	trim1->push(new IfcWrite::IfcSelectHelper(  0., Ifc2x3::Type::IfcParameterValue));
+	trim2->push(new IfcWrite::IfcSelectHelper(180., Ifc2x3::Type::IfcParameterValue));
+	IfcSchema::IfcTrimmedCurve* trim = new IfcSchema::IfcTrimmedCurve(ellipse, trim1, trim2, true, IfcSchema::IfcTrimmingPreference::IfcTrimmingPreference_PARAMETER);
+	file.addEntity(trim);
+
+	create_products_from_curve(file, trim);
+
+	file.getSingle<Ifc2x3::IfcProject>()->setName("IfcArbitraryOpenProfileDef");
+
+	std::ofstream f(filename);
+	f << file;
+}

src/examples/composite_profile_def.cpp

@@ -0,0 +1,119 @@
+/********************************************************************************
+ *                                                                              *
+ * This file is part of IfcOpenShell.                                           *
+ *                                                                              *
+ * IfcOpenShell is free software: you can redistribute it and/or modify         *
+ * it under the terms of the Lesser GNU General Public License as published by  *
+ * the Free Software Foundation, either version 3.0 of the License, or          *
+ * (at your option) any later version.                                          *
+ *                                                                              *
+ * IfcOpenShell is distributed in the hope that it will be useful,              *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of               *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                 *
+ * Lesser GNU General Public License for more details.                          *
+ *                                                                              *
+ * You should have received a copy of the Lesser GNU General Public License     *
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.         *
+ *                                                                              *
+ ********************************************************************************/
+
+/********************************************************************************
+ *                                                                              *
+ * Example that generates extrusions of parameterized profiles.                 *
+ *                                                                              *
+ ********************************************************************************/
+
+#include <string>
+#include <iostream>
+#include <fstream>
+
+#include "../ifcparse/Ifc2x3.h"
+#include "../ifcparse/IfcUtil.h"
+#include "../ifcparse/IfcHierarchyHelper.h"
+
+typedef std::string S;
+typedef IfcWrite::IfcGuidHelper guid;
+boost::none_t const null = (static_cast<boost::none_t>(0));
+
+int main(int argc, char** argv) {
+	const char filename[] = "IfcCompositeProfileDef.ifc";
+	IfcHierarchyHelper file;
+	file.filename(filename);
+
+	double coords1[] = {100.0, 0.0};
+	double coords2[] = {200.0, 0.0};
+	double coords3[] = {300.0, 0.0};
+
+	IfcSchema::IfcProfileDef::list profiles (new IfcTemplatedEntityList<IfcSchema::IfcProfileDef>());
+
+	IfcSchema::IfcCartesianTransformationOperator2D* transform1 = new IfcSchema::IfcCartesianTransformationOperator2D(file.addDoublet<IfcSchema::IfcDirection>(1, 0), file.addDoublet<IfcSchema::IfcDirection>(0, -1), file.addDoublet<IfcSchema::IfcCartesianPoint>(40, 0), null);
+	IfcSchema::IfcCartesianTransformationOperator2D* transform2 = new IfcSchema::IfcCartesianTransformationOperator2D(file.addDoublet<IfcSchema::IfcDirection>(0, -1), file.addDoublet<IfcSchema::IfcDirection>(1, 0), file.addDoublet<IfcSchema::IfcCartesianPoint>(40, 0), 0.3);
+	
+	IfcSchema::IfcProfileDef* p1 = new Ifc2x3::IfcIShapeProfileDef(
+		IfcSchema::IfcProfileTypeEnum::IfcProfileType_AREA,
+		null, file.addPlacement2d(),    25.0,    50.0,     5.0,     5.0,     2.0);
+
+	IfcSchema::IfcProfileDef* p2 = new Ifc2x3::IfcLShapeProfileDef(
+		IfcSchema::IfcProfileTypeEnum::IfcProfileType_AREA,
+		null, file.addPlacement2d(),    50.0,    25.0,     5.0,      1.0,     2.0,     2.0,    null,    null);
+
+	IfcSchema::IfcProfileDef* p3 = new Ifc2x3::IfcTShapeProfileDef(
+		IfcSchema::IfcProfileTypeEnum::IfcProfileType_AREA,
+		null, file.addPlacement2d(),    50.0,    40.0,    10.0,     10.0,     3.0,     2.0,     1.0,     2.0,     2.0,    null);
+
+	IfcSchema::IfcProfileDef* p4 = new Ifc2x3::IfcCShapeProfileDef(
+		IfcSchema::IfcProfileTypeEnum::IfcProfileType_AREA,
+		null, file.addPlacement2d(80.),    50.0,    25.0,     5.0,    10.0,     2.0,    null);
+
+	file.addEntity(p2);
+	file.addEntity(p3);
+	
+	file.addEntity(transform1);
+	file.addEntity(transform2);
+	
+	IfcSchema::IfcDerivedProfileDef* p5 = new IfcSchema::IfcDerivedProfileDef(IfcSchema::IfcProfileTypeEnum::IfcProfileType_AREA, null, p2, transform1, null);
+	IfcSchema::IfcDerivedProfileDef* p6 = new IfcSchema::IfcDerivedProfileDef(IfcSchema::IfcProfileTypeEnum::IfcProfileType_AREA, null, p3, transform2, null);
+	
+	profiles->push(p1);
+	profiles->push(p5);
+	profiles->push(p6);
+	profiles->push(p4);
+
+	file.addEntities(profiles->generalize());
+
+	IfcSchema::IfcCompositeProfileDef* composite = new IfcSchema::IfcCompositeProfileDef(IfcSchema::IfcProfileTypeEnum::IfcProfileType_AREA, S("IFC"), profiles, null);
+
+	IfcSchema::IfcBuildingElementProxy* product = new IfcSchema::IfcBuildingElementProxy(
+			guid(), 0, S("profile"), null, null, 0, 0, null, null);
+
+	file.addBuildingProduct(product);
+
+	product->setOwnerHistory(file.getSingle<IfcSchema::IfcOwnerHistory>());
+
+	product->setObjectPlacement(file.addLocalPlacement());
+
+	IfcSchema::IfcExtrudedAreaSolid* solid = new IfcSchema::IfcExtrudedAreaSolid(composite,
+		file.addPlacement3d(), file.addTriplet<IfcSchema::IfcDirection>(0, 0, 1), 20.0);
+
+	file.addEntity(composite);
+	file.addEntity(solid);
+		
+	IfcSchema::IfcRepresentation::list reps (new IfcTemplatedEntityList<IfcSchema::IfcRepresentation>());
+	IfcSchema::IfcRepresentationItem::list items (new IfcTemplatedEntityList<IfcSchema::IfcRepresentationItem>());
+		
+	items->push(solid);
+	IfcSchema::IfcShapeRepresentation* rep = new IfcSchema::IfcShapeRepresentation(
+		file.getSingle<IfcSchema::IfcRepresentationContext>(), S("Body"), S("SweptSolid"), items);
+	reps->push(rep);
+
+	IfcSchema::IfcProductDefinitionShape* shape = new IfcSchema::IfcProductDefinitionShape(0, 0, reps);
+	file.addEntity(rep);
+	file.addEntity(shape);
+		
+	product->setRepresentation(shape);
+
+	file.getSingle<IfcSchema::IfcProject>()->setName("IfcCompositeProfileDef");
+
+	std::ofstream f(filename);
+	f << file;
+}

src/examples/csg_primitive.cpp

@@ -0,0 +1,193 @@
+/********************************************************************************
+ *                                                                              *
+ * This file is part of IfcOpenShell.                                           *
+ *                                                                              *
+ * IfcOpenShell is free software: you can redistribute it and/or modify         *
+ * it under the terms of the Lesser GNU General Public License as published by  *
+ * the Free Software Foundation, either version 3.0 of the License, or          *
+ * (at your option) any later version.                                          *
+ *                                                                              *
+ * IfcOpenShell is distributed in the hope that it will be useful,              *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of               *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                 *
+ * Lesser GNU General Public License for more details.                          *
+ *                                                                              *
+ * You should have received a copy of the Lesser GNU General Public License     *
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.         *
+ *                                                                              *
+ ********************************************************************************/
+
+/********************************************************************************
+ *                                                                              *
+ * Example that generates a Constructive Solid Geometry example                 *
+ *                                                                              *
+ ********************************************************************************/
+
+#include <string>
+#include <iostream>
+#include <fstream>
+
+#include "../ifcparse/Ifc2x3.h"
+#include "../ifcparse/IfcUtil.h"
+#include "../ifcparse/IfcHierarchyHelper.h"
+
+typedef std::string S;
+typedef IfcWrite::IfcGuidHelper guid;
+boost::none_t const null = (static_cast<boost::none_t>(0));
+
+class Node {
+private:
+	typedef enum {
+		OP_ADD, OP_SUBTRACT, OP_INTERSECT, OP_TERMINAL
+	} Op;
+	typedef enum {
+		PRIM_BOX, PRIM_CONE, PRIM_CYLINDER, PRIM_PYRAMID, PRIM_SPHERE
+	} Prim;
+
+	double x,y,z, zx,zy,zz, xx,xy,xz, a,b,c;
+	const Node *left, *right;
+	
+	Op op;
+	Prim prim;
+
+	Node& operate(Op op, const Node& p) {
+		left = new Node(*this);
+		right = new Node(p);
+		this->op = op;
+		return *this;
+	}
+
+	Node(Prim p, double la, double lb=0., double lc=0.)
+		: prim(p), op(OP_TERMINAL),
+		  x(0.), y(0.), z(0.), 
+		  zx(0.), zy(0.), zz(1.), 
+		  xx(1.), xy(0.), xz(0.), 
+		  a(la), b(lb), c(lc) {}
+public:
+	static Node Sphere(double r) {
+		return Node(PRIM_SPHERE, r);
+	}
+	static Node Box(double dx, double dy, double dz) {
+		return Node(PRIM_BOX, dx, dy, dz);
+	}
+	static Node Pyramid(double dx, double dy, double dz) {
+		return Node(PRIM_PYRAMID, dx, dy, dz);
+	}
+	static Node Cylinder(double r, double h) {
+		return Node(PRIM_CYLINDER, r, h);
+	}
+	static Node Cone(double r, double h) {
+		return Node(PRIM_CONE, r, h);
+	}
+
+	Node& move(
+		double px = 0., double py = 0., double pz = 0., 
+		double zx = 0., double zy = 0., double zz = 1., 
+		double xx = 1., double xy = 0., double xz = 0.) 
+	{
+		this->x = px; this->y = py;	this->z = pz;
+		this->zx = zx; this->zy = zy; this->zz = zz;
+		this->xx = xx; this->xy = xy; this->xz = xz;
+		return *this;
+	}
+
+	Node& add(const Node& p) {
+		return operate(OP_ADD, p);
+	}
+	Node& subtract(const Node& p) {
+		return operate(OP_SUBTRACT, p);
+	}
+	Node& intersect(const Node& p) {
+		return operate(OP_INTERSECT, p);
+	}
+
+	IfcSchema::IfcRepresentationItem* serialize(IfcHierarchyHelper& file) const {
+		IfcSchema::IfcRepresentationItem* my;
+		if (op == OP_TERMINAL) {
+			IfcSchema::IfcAxis2Placement3D* place = file.addPlacement3d(x,y,z,zx,zy,zz,xx,xy,xz);
+			if (prim == PRIM_SPHERE) {
+				my = new IfcSchema::IfcSphere(place, a);
+			} else if (prim == PRIM_BOX) {
+				my = new IfcSchema::IfcBlock(place, a, b, c);
+			} else if (prim == PRIM_PYRAMID) {
+				my = new IfcSchema::IfcRectangularPyramid(place, a, b, c);
+			} else if (prim == PRIM_CYLINDER) {
+				my = new IfcSchema::IfcRightCircularCylinder(place, b, a);
+			} else if (prim == PRIM_CONE) {
+				my = new IfcSchema::IfcRightCircularCone(place, b, a);
+			}
+		} else {
+			IfcSchema::IfcBooleanOperator::IfcBooleanOperator o;
+			if (op == OP_ADD) {
+				o = IfcSchema::IfcBooleanOperator::IfcBooleanOperator_UNION;
+			} else if (op == OP_SUBTRACT) {
+				o = IfcSchema::IfcBooleanOperator::IfcBooleanOperator_DIFFERENCE;
+			} else if (op == OP_INTERSECT) {
+				o = IfcSchema::IfcBooleanOperator::IfcBooleanOperator_INTERSECTION;
+			}
+			my = new IfcSchema::IfcBooleanResult(o, left->serialize(file), right->serialize(file));
+		}
+		file.addEntity(my);
+		return my;
+	}
+};
+
+int main(int argc, char** argv) {
+	const char filename[] = "IfcCsgPrimitive.ifc";
+	IfcHierarchyHelper file;
+	file.filename(filename);
+
+	IfcSchema::IfcRepresentationItem* csg1 = Node::Box(8000.,6000.,3000.).subtract(
+		Node::Box(7600.,5600.,2800.).move(200.,200.,200.)
+	).add(
+		Node::Pyramid(8000.,6000.,3000.).move(0,0,3000.).add(
+			Node::Cylinder(1000.,4000.).move(4000.,1000.,4000., 0.,1.,0.)
+		).subtract(
+			Node::Pyramid(7600.,5600.,2800.).move(200.,200.,3000.)
+		).subtract(
+			Node::Cylinder(900.,4000.).move(4000.,1000.,4000., 0.,1.,0.).intersect(
+				Node::Box(2000.,4000.,1000.).move(3000.,1000.,4000.)
+			)
+		)
+	).serialize(file);
+
+	const double x = 1000.; const double y = -4000.;
+
+	IfcSchema::IfcRepresentationItem* csg2 = Node::Sphere(5000.).move(x,y,-4500.).intersect(
+		Node::Box(6000., 6000., 6000.).move(x-3000., y-3000., 0.)
+	).add(
+		Node::Cone(500., 3000.).move(x,y).add(
+			Node::Cone(1500., 1000.).move(x,y, 900.).add(
+				Node::Cone(1100., 1000.).move(x,y, 1800.).add(
+					Node::Cone(750., 600.).move(x,y, 2700.)
+	)))).serialize(file);
+
+	IfcSchema::IfcBuildingElementProxy* product = new IfcSchema::IfcBuildingElementProxy(
+			guid(), 0, S("IfcCsgPrimitive"), null, null, 0, 0, null, null);
+
+	file.addBuildingProduct(product);
+
+	product->setOwnerHistory(file.getSingle<IfcSchema::IfcOwnerHistory>());
+
+	product->setObjectPlacement(file.addLocalPlacement());
+		
+	IfcSchema::IfcRepresentation::list reps (new IfcTemplatedEntityList<IfcSchema::IfcRepresentation>());
+	IfcSchema::IfcRepresentationItem::list items (new IfcTemplatedEntityList<IfcSchema::IfcRepresentationItem>());
+		
+	items->push(csg1);
+	items->push(csg2);
+	IfcSchema::IfcShapeRepresentation* rep = new IfcSchema::IfcShapeRepresentation(
+		file.getSingle<IfcSchema::IfcRepresentationContext>(), S("Body"), S("CSG"), items);
+	reps->push(rep);
+
+	IfcSchema::IfcProductDefinitionShape* shape = new IfcSchema::IfcProductDefinitionShape(0, 0, reps);
+	file.addEntity(rep);
+	file.addEntity(shape);
+		
+	product->setRepresentation(shape);
+
+	file.getSingle<IfcSchema::IfcProject>()->setName("IfcCompositeProfileDef");
+
+	std::ofstream f(filename);
+	f << file;
+}

src/examples/ellipse_pies.cpp

@@ -0,0 +1,148 @@
+/********************************************************************************
+ *                                                                              *
+ * This file is part of IfcOpenShell.                                           *
+ *                                                                              *
+ * IfcOpenShell is free software: you can redistribute it and/or modify         *
+ * it under the terms of the Lesser GNU General Public License as published by  *
+ * the Free Software Foundation, either version 3.0 of the License, or          *
+ * (at your option) any later version.                                          *
+ *                                                                              *
+ * IfcOpenShell is distributed in the hope that it will be useful,              *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of               *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                 *
+ * Lesser GNU General Public License for more details.                          *
+ *                                                                              *
+ * You should have received a copy of the Lesser GNU General Public License     *
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.         *
+ *                                                                              *
+ ********************************************************************************/
+
+/********************************************************************************
+ *                                                                              *
+ * Example that generates profiles of trimmed ellipses.                         *
+ *                                                                              *
+ ********************************************************************************/
+
+#include <string>
+#include <iostream>
+#include <fstream>
+
+#include "../ifcparse/Ifc2x3.h"
+#include "../ifcparse/IfcUtil.h"
+#include "../ifcparse/IfcHierarchyHelper.h"
+
+typedef std::string S;
+typedef IfcWrite::IfcGuidHelper guid;
+boost::none_t const null = (static_cast<boost::none_t>(0));
+
+typedef struct {
+	double r1;
+	double r2;
+	double t1;
+	double t2;
+} EllipsePie;
+
+static int i = 0;
+
+void create_testcase_for(IfcHierarchyHelper& file, const EllipsePie& pie, Ifc2x3::IfcTrimmingPreference::IfcTrimmingPreference pref) {
+	const double deg = 1. / 180. * 3.141592653;
+	double flt1[] = {0.                      , 0.                      };
+	double flt2[] = {pie.r1 * cos(pie.t1*deg), pie.r2 * sin(pie.t1*deg)};
+	double flt3[] = {pie.r1 * cos(pie.t2*deg), pie.r2 * sin(pie.t2*deg)};
+
+	std::vector<double> coords1(flt1, flt1 + 2);
+	std::vector<double> coords2(flt2, flt2 + 2);
+	std::vector<double> coords3(flt3, flt3 + 2);
+	
+	Ifc2x3::IfcCartesianPoint* p1 = new Ifc2x3::IfcCartesianPoint(coords1);
+	Ifc2x3::IfcCartesianPoint* p2 = new Ifc2x3::IfcCartesianPoint(coords2);
+	Ifc2x3::IfcCartesianPoint* p3 = new Ifc2x3::IfcCartesianPoint(coords3);
+	
+	Ifc2x3::IfcCartesianPoint::list points(new IfcTemplatedEntityList<Ifc2x3::IfcCartesianPoint>());
+	points->push(p3);
+	points->push(p1);
+	points->push(p2);
+	file.addEntities(points->generalize());
+
+	
+	Ifc2x3::IfcEllipse* ellipse = new Ifc2x3::IfcEllipse(file.addPlacement2d(), pie.r1, pie.r2);
+	file.addEntity(ellipse);
+	IfcEntityList::ptr trim1(new IfcEntityList);
+	IfcEntityList::ptr trim2(new IfcEntityList);
+	if (pref == Ifc2x3::IfcTrimmingPreference::IfcTrimmingPreference_PARAMETER) {
+		trim1->push(new IfcWrite::IfcSelectHelper(pie.t1, Ifc2x3::Type::IfcParameterValue));
+		trim2->push(new IfcWrite::IfcSelectHelper(pie.t2, Ifc2x3::Type::IfcParameterValue));
+	} else {
+		trim1->push(p2);
+		trim2->push(p3);
+	}
+	Ifc2x3::IfcTrimmedCurve* trim = new Ifc2x3::IfcTrimmedCurve(ellipse, trim1, trim2, true, pref);
+	file.addEntity(trim);
+	
+	Ifc2x3::IfcCompositeCurveSegment::list segments(new IfcTemplatedEntityList<Ifc2x3::IfcCompositeCurveSegment>());
+	Ifc2x3::IfcCompositeCurveSegment* s2 = new Ifc2x3::IfcCompositeCurveSegment(Ifc2x3::IfcTransitionCode::IfcTransitionCode_CONTINUOUS, true, trim);
+	
+	Ifc2x3::IfcPolyline* poly = new Ifc2x3::IfcPolyline(points);	
+	file.addEntity(poly);
+	Ifc2x3::IfcCompositeCurveSegment* s1 = new Ifc2x3::IfcCompositeCurveSegment(Ifc2x3::IfcTransitionCode::IfcTransitionCode_CONTINUOUS, true, poly);
+	segments->push(s1);
+	
+	segments->push(s2);
+	file.addEntities(segments->generalize());
+	
+	Ifc2x3::IfcCompositeCurve* ccurve = new Ifc2x3::IfcCompositeCurve(segments, false);
+	Ifc2x3::IfcArbitraryClosedProfileDef* profile = new Ifc2x3::IfcArbitraryClosedProfileDef(Ifc2x3::IfcProfileTypeEnum::IfcProfileType_AREA, null, ccurve);
+	file.addEntity(ccurve);
+	file.addEntity(profile);
+
+	IfcSchema::IfcBuildingElementProxy* product = new IfcSchema::IfcBuildingElementProxy(
+		guid(), 0, S("profile"), null, null, 0, 0, null, null);
+	file.addBuildingProduct(product);
+	product->setOwnerHistory(file.getSingle<IfcSchema::IfcOwnerHistory>());
+
+	product->setObjectPlacement(file.addLocalPlacement(200 * i++));
+
+	IfcSchema::IfcExtrudedAreaSolid* solid = new IfcSchema::IfcExtrudedAreaSolid(profile,
+		file.addPlacement3d(), file.addTriplet<IfcSchema::IfcDirection>(0, 0, 1), 20.0);
+
+	file.addEntity(solid);
+		
+	IfcSchema::IfcRepresentation::list reps (new IfcTemplatedEntityList<IfcSchema::IfcRepresentation>());
+	IfcSchema::IfcRepresentationItem::list items (new IfcTemplatedEntityList<IfcSchema::IfcRepresentationItem>());
+		
+	items->push(solid);
+	IfcSchema::IfcShapeRepresentation* rep = new IfcSchema::IfcShapeRepresentation(
+		file.getSingle<IfcSchema::IfcRepresentationContext>(), S("Body"), S("SweptSolid"), items);
+	reps->push(rep);
+
+	IfcSchema::IfcProductDefinitionShape* shape = new IfcSchema::IfcProductDefinitionShape(0, 0, reps);
+	file.addEntity(rep);
+	file.addEntity(shape);
+		
+	product->setRepresentation(shape);
+}
+
+int main(int argc, char** argv) {
+	const std::string filename = "ellipse_pies.ifc";
+	IfcHierarchyHelper file;
+	{ EllipsePie pie = {80., 50.,  0., 150.};
+	create_testcase_for(file, pie, Ifc2x3::IfcTrimmingPreference::IfcTrimmingPreference_PARAMETER);
+	create_testcase_for(file, pie, Ifc2x3::IfcTrimmingPreference::IfcTrimmingPreference_CARTESIAN);}
+	{ EllipsePie pie = {80,  50., 30., 300.};
+	create_testcase_for(file, pie, Ifc2x3::IfcTrimmingPreference::IfcTrimmingPreference_PARAMETER);
+	create_testcase_for(file, pie, Ifc2x3::IfcTrimmingPreference::IfcTrimmingPreference_CARTESIAN);}
+	{ EllipsePie pie = {80,  50., 300., 30.};
+	create_testcase_for(file, pie, Ifc2x3::IfcTrimmingPreference::IfcTrimmingPreference_PARAMETER);
+	create_testcase_for(file, pie, Ifc2x3::IfcTrimmingPreference::IfcTrimmingPreference_CARTESIAN);}
+	{ EllipsePie pie = {50., 80.,  0., 150.};
+	create_testcase_for(file, pie, Ifc2x3::IfcTrimmingPreference::IfcTrimmingPreference_PARAMETER);
+	create_testcase_for(file, pie, Ifc2x3::IfcTrimmingPreference::IfcTrimmingPreference_CARTESIAN);}
+	{ EllipsePie pie = {50,  80., 30., 300.};
+	create_testcase_for(file, pie, Ifc2x3::IfcTrimmingPreference::IfcTrimmingPreference_PARAMETER);
+	create_testcase_for(file, pie, Ifc2x3::IfcTrimmingPreference::IfcTrimmingPreference_CARTESIAN);}
+	{ EllipsePie pie = {50,  80., 300., 30.};
+	create_testcase_for(file, pie, Ifc2x3::IfcTrimmingPreference::IfcTrimmingPreference_PARAMETER);
+	create_testcase_for(file, pie, Ifc2x3::IfcTrimmingPreference::IfcTrimmingPreference_CARTESIAN);}
+	std::ofstream f(filename.c_str());
+	f << file;
+}

src/examples/profiles.cpp

@@ -0,0 +1,206 @@
+/********************************************************************************
+ *                                                                              *
+ * This file is part of IfcOpenShell.                                           *
+ *                                                                              *
+ * IfcOpenShell is free software: you can redistribute it and/or modify         *
+ * it under the terms of the Lesser GNU General Public License as published by  *
+ * the Free Software Foundation, either version 3.0 of the License, or          *
+ * (at your option) any later version.                                          *
+ *                                                                              *
+ * IfcOpenShell is distributed in the hope that it will be useful,              *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of               *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                 *
+ * Lesser GNU General Public License for more details.                          *
+ *                                                                              *
+ * You should have received a copy of the Lesser GNU General Public License     *
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.         *
+ *                                                                              *
+ ********************************************************************************/
+
+/********************************************************************************
+ *                                                                              *
+ * Example that generates extrusions of parameterized profiles.                 *
+ *                                                                              *
+ ********************************************************************************/
+
+#include <string>
+#include <iostream>
+#include <fstream>
+
+#include "../ifcparse/Ifc2x3.h"
+#include "../ifcparse/IfcUtil.h"
+#include "../ifcparse/IfcHierarchyHelper.h"
+
+typedef std::string S;
+typedef IfcWrite::IfcGuidHelper guid;
+boost::none_t const null = (static_cast<boost::none_t>(0));
+
+void create_testcase_for(IfcSchema::IfcProfileDef::list::ptr profiles) {
+	IfcSchema::IfcProfileDef* profile = *profiles->begin();
+	const std::string profile_type = IfcSchema::Type::ToString(profile->type());
+	const std::string filename = profile_type + ".ifc";
+	
+	IfcHierarchyHelper file;
+	file.filename(filename);
+	
+	int i = 0;
+	for (IfcSchema::IfcProfileDef::list::it it = profiles->begin(); it != profiles->end(); ++it, ++i) {
+		IfcSchema::IfcProfileDef* profile = *it;
+		IfcSchema::IfcBuildingElementProxy* product = new IfcSchema::IfcBuildingElementProxy(
+			guid(), 0, S("profile"), null, null, 0, 0, null, null);
+		file.addBuildingProduct(product);
+		file.getSingle<IfcSchema::IfcProject>()->setName(profile_type);
+		product->setOwnerHistory(file.getSingle<IfcSchema::IfcOwnerHistory>());
+
+		product->setObjectPlacement(file.addLocalPlacement(0, 100. * i));
+
+		if (profile->is(IfcSchema::Type::IfcParameterizedProfileDef)) {
+			((IfcSchema::IfcParameterizedProfileDef*) profile)->setPosition(file.addPlacement2d());
+		}
+
+		IfcSchema::IfcExtrudedAreaSolid* solid = new IfcSchema::IfcExtrudedAreaSolid(profile,
+			file.addPlacement3d(), file.addTriplet<IfcSchema::IfcDirection>(0, 0, 1), 20.0);
+
+		file.addEntity(profile);
+		file.addEntity(solid);
+		
+		IfcSchema::IfcRepresentation::list::ptr reps (new IfcSchema::IfcRepresentation::list);
+		IfcSchema::IfcRepresentationItem::list::ptr items (new IfcSchema::IfcRepresentationItem::list);
+		
+		items->push(solid);
+		IfcSchema::IfcShapeRepresentation* rep = new IfcSchema::IfcShapeRepresentation(
+			file.getSingle<IfcSchema::IfcRepresentationContext>(), S("Body"), S("SweptSolid"), items);
+		reps->push(rep);
+
+		IfcSchema::IfcProductDefinitionShape* shape = new IfcSchema::IfcProductDefinitionShape(0, 0, reps);
+		file.addEntity(rep);
+		file.addEntity(shape);
+		
+		product->setRepresentation(shape);
+	}
+	
+	std::ofstream f(filename.c_str());
+	f << file;
+}
+
+int main(int argc, char** argv) {
+	{ IfcSchema::IfcProfileDef::list::ptr profiles (new IfcSchema::IfcProfileDef::list);
+	profiles->push(new Ifc2x3::IfcUShapeProfileDef(
+		IfcSchema::IfcProfileTypeEnum::IfcProfileType_AREA,
+		null, 0,    50.0,    25.0,     5.0,     5.0,    null,    null,    null,    null));
+	profiles->push(new Ifc2x3::IfcUShapeProfileDef(
+		IfcSchema::IfcProfileTypeEnum::IfcProfileType_AREA,
+		null, 0,    50.0,    25.0,     5.0,     5.0,     2.0,     2.0,    null,    null));
+	profiles->push(new Ifc2x3::IfcUShapeProfileDef(
+		IfcSchema::IfcProfileTypeEnum::IfcProfileType_AREA,
+		null, 0,    50.0,    25.0,     5.0,     5.0,    null,    null,     4.0,    null));
+	profiles->push(new Ifc2x3::IfcUShapeProfileDef(
+		IfcSchema::IfcProfileTypeEnum::IfcProfileType_AREA,
+		null, 0,    50.0,    25.0,     5.0,     5.0,     1.0,     3.0,     6.0,    null));
+	create_testcase_for(profiles); }
+	
+    { IfcSchema::IfcProfileDef::list::ptr profiles (new IfcSchema::IfcProfileDef::list);
+	profiles->push(new Ifc2x3::IfcTShapeProfileDef(
+		IfcSchema::IfcProfileTypeEnum::IfcProfileType_AREA,
+		null, 0,    50.0,    25.0,     5.0,     5.0,    null,    null,    null,    null,    null,    null));
+	profiles->push(new Ifc2x3::IfcTShapeProfileDef(
+		IfcSchema::IfcProfileTypeEnum::IfcProfileType_AREA,
+		null, 0,    50.0,    25.0,     5.0,     5.0,     2.0,     2.0,     2.0,    null,    null,    null));
+	profiles->push(new Ifc2x3::IfcTShapeProfileDef(
+		IfcSchema::IfcProfileTypeEnum::IfcProfileType_AREA,
+		null, 0,    50.0,    25.0,     5.0,     5.0,    null,    null,    null,     2.0,     2.0,    null));
+	profiles->push(new Ifc2x3::IfcTShapeProfileDef(
+		IfcSchema::IfcProfileTypeEnum::IfcProfileType_AREA,
+		null, 0,    50.0,    25.0,     5.0,     5.0,     3.0,     2.0,     1.0,     2.0,     2.0,    null));
+	create_testcase_for(profiles); }
+	
+    { IfcSchema::IfcProfileDef::list::ptr profiles (new IfcSchema::IfcProfileDef::list);
+	profiles->push(new Ifc2x3::IfcZShapeProfileDef(
+		IfcSchema::IfcProfileTypeEnum::IfcProfileType_AREA,
+		null, 0,    50.0,    25.0,     5.0,     5.0,    null,    null));
+	profiles->push(new Ifc2x3::IfcZShapeProfileDef(
+		IfcSchema::IfcProfileTypeEnum::IfcProfileType_AREA,
+		null, 0,    50.0,    25.0,     5.0,     5.0,     2.0,     2.0));
+	create_testcase_for(profiles); }
+	
+    { IfcSchema::IfcProfileDef::list::ptr profiles (new IfcSchema::IfcProfileDef::list);
+	profiles->push(new Ifc2x3::IfcEllipseProfileDef(
+		IfcSchema::IfcProfileTypeEnum::IfcProfileType_AREA,
+		null, 0,    25.0,    15.0));
+	profiles->push(new Ifc2x3::IfcEllipseProfileDef(
+		IfcSchema::IfcProfileTypeEnum::IfcProfileType_AREA,
+		null, 0,    15.0,    25.0));
+	create_testcase_for(profiles); }
+	
+    { IfcSchema::IfcProfileDef::list::ptr profiles (new IfcSchema::IfcProfileDef::list);
+	profiles->push(new Ifc2x3::IfcIShapeProfileDef(
+		IfcSchema::IfcProfileTypeEnum::IfcProfileType_AREA,
+		null, 0,    25.0,    50.0,     5.0,     5.0,    null));
+	profiles->push(new Ifc2x3::IfcIShapeProfileDef(
+		IfcSchema::IfcProfileTypeEnum::IfcProfileType_AREA,
+		null, 0,    25.0,    50.0,     5.0,     5.0,     2.0));
+	profiles->push(new Ifc2x3::IfcAsymmetricIShapeProfileDef(
+		IfcSchema::IfcProfileTypeEnum::IfcProfileType_AREA,
+		null, 0,    25.0,    50.0,     5.0,     5.0,     2.0, 20.0, 10.0, 5.0, null));
+	create_testcase_for(profiles); }
+
+    { IfcSchema::IfcProfileDef::list::ptr profiles (new IfcSchema::IfcProfileDef::list);
+	profiles->push(new Ifc2x3::IfcLShapeProfileDef(
+		IfcSchema::IfcProfileTypeEnum::IfcProfileType_AREA,
+		null, 0,    50.0,    25.0,     5.0,     null,    null,    null,    null,    null));
+	profiles->push(new Ifc2x3::IfcLShapeProfileDef(
+		IfcSchema::IfcProfileTypeEnum::IfcProfileType_AREA,
+		null, 0,    50.0,    25.0,     5.0,     2.0,      2.0,    null,    null,    null));
+	profiles->push(new Ifc2x3::IfcLShapeProfileDef(
+		IfcSchema::IfcProfileTypeEnum::IfcProfileType_AREA,
+		null, 0,    50.0,    25.0,     5.0,     null,    null,     2.0,    null,    null));
+	profiles->push(new Ifc2x3::IfcLShapeProfileDef(
+		IfcSchema::IfcProfileTypeEnum::IfcProfileType_AREA,
+		null, 0,    50.0,    25.0,     5.0,      1.0,     2.0,     2.0,    null,    null));
+	create_testcase_for(profiles); }
+	
+    { IfcSchema::IfcProfileDef::list::ptr profiles (new IfcSchema::IfcProfileDef::list);
+	profiles->push(new Ifc2x3::IfcCShapeProfileDef(
+		IfcSchema::IfcProfileTypeEnum::IfcProfileType_AREA,
+		null, 0,    50.0,    25.0,     5.0,    10.0,    null,    null));
+	profiles->push(new Ifc2x3::IfcCShapeProfileDef(
+		IfcSchema::IfcProfileTypeEnum::IfcProfileType_AREA,
+		null, 0,    50.0,    25.0,     5.0,    10.0,     2.0,    null));
+	create_testcase_for(profiles); }
+
+    { IfcSchema::IfcProfileDef::list::ptr profiles (new IfcSchema::IfcProfileDef::list);
+	profiles->push(new Ifc2x3::IfcCircleProfileDef(
+		IfcSchema::IfcProfileTypeEnum::IfcProfileType_AREA,
+		null, 0,    25.0));
+	profiles->push(new Ifc2x3::IfcCircleHollowProfileDef(
+		IfcSchema::IfcProfileTypeEnum::IfcProfileType_AREA,
+		null, 0,    25.0,     5.0));
+	create_testcase_for(profiles); }
+	
+    { IfcSchema::IfcProfileDef::list::ptr profiles (new IfcSchema::IfcProfileDef::list);
+	profiles->push(new Ifc2x3::IfcRectangleProfileDef(
+		IfcSchema::IfcProfileTypeEnum::IfcProfileType_AREA,
+		null, 0,    50.0,    25.0));
+	profiles->push(new Ifc2x3::IfcRoundedRectangleProfileDef(
+		IfcSchema::IfcProfileTypeEnum::IfcProfileType_AREA,
+		null, 0,    50.0,    25.0,     5.0));
+	profiles->push(new Ifc2x3::IfcRectangleHollowProfileDef(
+		IfcSchema::IfcProfileTypeEnum::IfcProfileType_AREA,
+		null, 0,    50.0,    25.0,     5.0,    null,    null));
+	profiles->push(new Ifc2x3::IfcRectangleHollowProfileDef(
+		IfcSchema::IfcProfileTypeEnum::IfcProfileType_AREA,
+		null, 0,    50.0,    25.0,     5.0,     2.0,     4.0));
+	create_testcase_for(profiles); }
+	
+    { IfcSchema::IfcProfileDef::list::ptr profiles (new IfcSchema::IfcProfileDef::list);
+	profiles->push(new Ifc2x3::IfcTrapeziumProfileDef(
+		IfcSchema::IfcProfileTypeEnum::IfcProfileType_AREA,
+		null, 0,    50.0,    30.0,    25.0,     0.0));
+	profiles->push(new Ifc2x3::IfcTrapeziumProfileDef(
+		IfcSchema::IfcProfileTypeEnum::IfcProfileType_AREA,
+		null, 0,    50.0,    60.0,    25.0,   -20.0));
+	profiles->push(new Ifc2x3::IfcTrapeziumProfileDef(
+		IfcSchema::IfcProfileTypeEnum::IfcProfileType_AREA,
+		null, 0,    50.0,    10.0,    25.0,    30.0));
+	create_testcase_for(profiles); }
+}

src/ifcblender/io_import_scene_ifc/__init__.py

@@ -30,27 +30,16 @@ bl_info = {
     "description": "Import files in the "\
         "Industry Foundation Classes (.ifc) file format",
     "author": "Thomas Krijnen, IfcOpenShell",
-    "blender": (2, 5, 8),
-    "api": 37702,
+    "blender": (2, 73, 0),
     "location": "File > Import",
-    "warning": "",
-    "wiki_url": "http://sourceforge.net/apps/"\
-        "mediawiki/ifcopenshell/index.php",
-    "tracker_url": "http://sourceforge.net/tracker/?group_id=543113",
+    "tracker_url": "https://sourceforge.net/p/ifcopenshell/"\
+        "_list/tickets?source=navbar",
     "category": "Import-Export"}
 
-import sys   
-max_unicode = 0x110000-1 if sys.platform[0:5] == 'linux' else 0x10000-1
-wrong_unicode = max_unicode != sys.maxunicode
-if wrong_unicode:
-    print("\nWarning: wrong unicode representation detected, switching to "\
-        "compatibility layer for text transferral, may result in undefined "\
-        "behaviour, please use offical release from http://blender.org\n")
-    
 if "bpy" in locals():
     import imp
-    if "IfcImport" in locals():
-        imp.reload(IfcImport)
+    if "ifcopenshell" in locals():
+        imp.reload(ifcopenshell)
 
 import bpy
 import mathutils
@@ -70,54 +59,64 @@ bpy.types.Object.ifc_type = StringProperty(name="IFC Entity Type",
     description="The STEP Datatype keyword")
 
 
-def import_ifc(filename, use_names, process_relations):
-    global wrong_unicode
-    from . import IfcImport
+def import_ifc(filename, use_names, process_relations, blender_booleans):
+    from . import ifcopenshell
+    from .ifcopenshell import geom as ifcopenshell_geom
     print("Reading %s..."%bpy.path.basename(filename))
-    if wrong_unicode:
-        valid_file = IfcImport.InitUCS2( 
-            ''.join(['\0']+['\0%s'%s for s in filename]+['\0\0'])
-        )
-    else:
-        valid_file = IfcImport.Init(filename)
+    settings = ifcopenshell_geom.settings()
+    settings.set(settings.DISABLE_OPENING_SUBTRACTIONS, blender_booleans)
+    iterator = ifcopenshell_geom.iterator(settings, filename)
+    valid_file = iterator.findContext()
     if not valid_file:
-        IfcImport.CleanUp()
         return False
     print("Done reading file")
     id_to_object = {}
     id_to_parent = {}
     id_to_matrix = {}
+    openings = []
     old_progress = -1
     print("Creating geometry...")
     while True:
-        ob = IfcImport.Get()
-        
-        if wrong_unicode:
-            ob_name = ''.join([chr(c) for c in ob.name_as_intvector()])
-            ob_type = ''.join([chr(c) for c in ob.type_as_intvector()])
-            ob_guid = ''.join([chr(c) for c in ob.guid_as_intvector()])
-        else:
-            ob_name, ob_type, ob_guid = ob.name, ob.type, ob.guid
-        
-        f = ob.mesh.faces
-        v = ob.mesh.verts
-        m = ob.matrix
-        t = ob_type[0:21]
-        nm = ob_name if len(ob_name) and use_names else ob_guid
+        ob = iterator.get()
+ 
+        f = ob.geometry.faces
+        v = ob.geometry.verts
+        mats = ob.geometry.materials
+        matids = ob.geometry.material_ids
+        m = ob.transformation.matrix.data
+        t = ob.type[0:21]
+        nm = ob.name if len(ob.name) and use_names else ob.guid
 
         verts = [[v[i], v[i + 1], v[i + 2]] \
             for i in range(0, len(v), 3)]
         faces = [[f[i], f[i + 1], f[i + 2]] \
             for i in range(0, len(f), 3)]
 
-        me = bpy.data.meshes.new('mesh%d' % ob.mesh.id)
+        me = bpy.data.meshes.new('mesh%d' % ob.geometry.id)
         me.from_pydata(verts, [], faces)
-        if t in bpy.data.materials:
-            mat = bpy.data.materials[t]
-            mat.use_fake_user = True
-        else:
-            mat = bpy.data.materials.new(t)
-        me.materials.append(mat)
+        
+        def add_material(mname, props):
+            if mname in bpy.data.materials:
+                mat = bpy.data.materials[mname]
+                mat.use_fake_user = True
+            else:
+                mat = bpy.data.materials.new(mname)
+                for k,v in props.items():
+                    setattr(mat, k, v)
+            me.materials.append(mat)
+                
+        needs_default = -1 in matids
+        if needs_default: add_material(t, {})
+        
+        for mat in mats:
+            props = {}
+            if mat.has_diffuse: props['diffuse_color'] = mat.diffuse
+            if mat.has_specular: props['specular_color'] = mat.specular
+            if mat.has_transparency and mat.transparency > 0:
+                props['alpha'] = 1.0 - mat.transparency
+                props['use_transparency'] = True
+            if mat.has_specularity: props['specular_hardness'] = mat.specularity
+            add_material(mat.name, props)
 
         bob = bpy.data.objects.new(nm, me)
         mat = mathutils.Matrix(([m[0], m[1], m[2], 0],
@@ -138,10 +137,12 @@ def import_ifc(filename, use_names, process_relations):
         bpy.ops.object.mode_set(mode='OBJECT')
 
         bob.ifc_id, bob.ifc_guid, bob.ifc_name, bob.ifc_type = \
-            ob.id, ob_guid, ob_name, ob_type
+            ob.id, ob.guid, ob.name, ob.type
 
-        bob.hide = ob_type == 'IfcSpace' or ob_type == 'IfcOpeningElement'
-        bob.hide_render = bob.hide
+        if ob.type == 'IfcSpace' or ob.type == 'IfcOpeningElement':
+            if not (ob.type == 'IfcOpeningElement' and blender_booleans):
+                bob.hide = bob.hide_render = True
+            bob.draw_type = 'WIRE'
         
         if ob.id not in id_to_object: id_to_object[ob.id] = []
         id_to_object[ob.id].append(bob)
@@ -149,11 +150,19 @@ def import_ifc(filename, use_names, process_relations):
         if ob.parent_id > 0:
             id_to_parent[ob.id] = ob.parent_id
             
-        progress = IfcImport.Progress() // 2
+        if blender_booleans and ob.type == 'IfcOpeningElement':
+            openings.append(ob.id)
+            
+        faces = me.polygons if hasattr(me, 'polygons') else me.faces
+        if len(faces) == len(matids):
+            for face, matid in zip(faces, matids):
+                face.material_index = matid + (1 if needs_default else 0)
+            
+        progress = iterator.progress() // 2
         if progress > old_progress:
             print("\r[" + "#" * progress + " " * (50 - progress) + "]", end="")
             old_progress = progress
-        if not IfcImport.Next():
+        if not iterator.next():
             break
 
     print("\rDone creating geometry" + " " * 30)
@@ -169,24 +178,13 @@ def import_ifc(filename, use_names, process_relations):
         if parent_id in id_to_object:
             bob = id_to_object[parent_id][0]
         else:
-            parent_ob = IfcImport.GetObject(parent_id)
+            parent_ob = iterator.getObject(parent_id)
             if parent_ob.id == -1:
                 bob = None
             else:
-                if wrong_unicode:
-                    parent_ob_name = ''.join(
-                        [chr(c) for c in parent_ob.name_as_intvector()])
-                    parent_ob_type = ''.join(
-                        [chr(c) for c in parent_ob.type_as_intvector()])
-                    parent_ob_guid = ''.join(
-                        [chr(c) for c in parent_ob.guid_as_intvector()])
-                else:
-                    parent_ob_name, parent_ob_type, parent_ob_guid = \
-                        parent_ob.name, parent_ob.type, parent_ob.guid
-                    
-                m = parent_ob.matrix
-                nm = parent_ob_name if len(parent_ob_name) and use_names \
-                    else parent_ob_guid
+                m = parent_ob.transformation.matrix.data
+                nm = parent_ob.name if len(parent_ob.name) and use_names \
+                    else parent_ob.guid
                 bob = bpy.data.objects.new(nm, None)
                 
                 mat = mathutils.Matrix((
@@ -201,7 +199,7 @@ def import_ifc(filename, use_names, process_relations):
 
                 bob.ifc_id = parent_ob.id
                 bob.ifc_name, bob.ifc_type, bob.ifc_guid = \
-                    parent_ob_name, parent_ob_type, parent_ob_guid
+                    parent_ob.name, parent_ob.type, parent_ob.guid
 
                 if parent_ob.parent_id > 0:
                     id_to_parent[parent_id] = parent_ob.parent_id
@@ -226,13 +224,19 @@ def import_ifc(filename, use_names, process_relations):
             
     if process_relations:
         print("Done processing relations")
-    
-    if not wrong_unicode:
-        txt = bpy.data.texts.new("%s.log"%bpy.path.basename(filename))
-        txt.from_string(IfcImport.GetLog())
+        
+    for opening_id in openings:
+        parent_id = id_to_parent[opening_id]
+        if parent_id in id_to_object:
+            parent_ob = id_to_object[parent_id][0]
+            for opening_ob in id_to_object[opening_id]:
+                mod = parent_ob.modifiers.new("opening", "BOOLEAN")
+                mod.operation = "DIFFERENCE"
+                mod.object = opening_ob
+        
+    txt = bpy.data.texts.new("%s.log"%bpy.path.basename(filename))
+    txt.from_string(iterator.getLog())
 
-    IfcImport.CleanUp()
-    
     return True
 
 
@@ -251,15 +255,13 @@ class ImportIFC(bpy.types.Operator, ImportHelper):
             " relations to parenting" \
             " (warning: may be slow on large files)",
         default=False)
+    blender_booleans = BoolProperty(name="Use Blender booleans",
+        description="Use Blender boolean modifiers for opening" \
+            " elements",
+        default=False)
 
     def execute(self, context):
-        global wrong_unicode
-        if wrong_unicode and sys.platform[0:5] != 'linux':
-            self.report({'ERROR'},
-                'Your version of Blender is incompatible with IfcBlender\n' \
-                'Please use the offical release from http://blender.org instead'
-            )
-        elif not import_ifc(self.filepath, self.use_names, self.process_relations):
+        if not import_ifc(self.filepath, self.use_names, self.process_relations, self.blender_booleans):
             self.report({'ERROR'},
                 'Unable to parse .ifc file or no geometrical entities found'
             )

src/ifcconvert/ColladaSerializer.cpp

@@ -0,0 +1,278 @@
+/********************************************************************************
+ *                                                                              *
+ * This file is part of IfcOpenShell.                                           *
+ *                                                                              *
+ * IfcOpenShell is free software: you can redistribute it and/or modify         *
+ * it under the terms of the Lesser GNU General Public License as published by  *
+ * the Free Software Foundation, either version 3.0 of the License, or          *
+ * (at your option) any later version.                                          *
+ *                                                                              *
+ * IfcOpenShell is distributed in the hope that it will be useful,              *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of               *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                 *
+ * Lesser GNU General Public License for more details.                          *
+ *                                                                              *
+ * You should have received a copy of the Lesser GNU General Public License     *
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.         *
+ *                                                                              *
+ ********************************************************************************/
+
+#ifdef WITH_OPENCOLLADA
+
+#include <string>
+
+#include "ColladaSerializer.h"
+
+std::string collada_id(const std::string& s) {
+	std::string id;
+	id.reserve(s.size());
+	for (std::string::const_iterator it = s.begin(); it != s.end(); ++it) {
+		const std::string::value_type c = *it;
+		if ((c >= '0' && c <= '9') || (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || (c == '_')) {
+			id.push_back(c);
+		}
+	}
+	return id;
+}
+
+void ColladaSerializer::ColladaExporter::ColladaGeometries::addFloatSource(const std::string& mesh_id, const std::string& suffix, const std::vector<double>& floats, const char* coords /* = "XYZ" */) {
+	COLLADASW::FloatSource source(mSW);
+	source.setId(mesh_id + suffix);
+	source.setArrayId(mesh_id + suffix + COLLADASW::LibraryGeometries::ARRAY_ID_SUFFIX);
+	source.setAccessorStride(strlen(coords));
+	source.setAccessorCount(floats.size() / 3);
+	for (unsigned int i = 0; i < source.getAccessorStride(); ++i) {
+		source.getParameterNameList().push_back(std::string(1, coords[i]));
+	}
+	source.prepareToAppendValues();
+	for (std::vector<double>::const_iterator it = floats.begin(); it != floats.end(); ++it) {
+		source.appendValues(*it);
+	}
+	source.finish();
+}
+			
+void ColladaSerializer::ColladaExporter::ColladaGeometries::write(const std::string mesh_id, const std::string& default_material_name, const std::vector<double>& positions, const std::vector<double>& normals, const std::vector<int>& indices, const std::vector<int> material_ids, const std::vector<IfcGeom::Material>& materials) {
+	// The goal of the IfcGeom::Iterator is to filter out empty geometries, but
+	// since this function would crash trying to deference the material_ids in
+	// that case, a hard return statement is added just in case.
+	if (indices.empty()) return;
+
+	openMesh(mesh_id);
+
+	// The normals vector can be empty for example when the WELD_VERTICES setting is used.
+	// IfcOpenShell does not provide them with multiple face normals collapsed into a single vertex.
+	const bool has_normals = !normals.empty();
+
+	addFloatSource(mesh_id, COLLADASW::LibraryGeometries::POSITIONS_SOURCE_ID_SUFFIX, positions);
+	if (has_normals) {
+		addFloatSource(mesh_id, COLLADASW::LibraryGeometries::NORMALS_SOURCE_ID_SUFFIX, normals);
+	}
+
+	COLLADASW::VerticesElement vertices(mSW);
+	vertices.setId(mesh_id + COLLADASW::LibraryGeometries::VERTICES_ID_SUFFIX );
+	vertices.getInputList().push_back(COLLADASW::Input(COLLADASW::InputSemantic::POSITION, "#" + mesh_id + COLLADASW::LibraryGeometries::POSITIONS_SOURCE_ID_SUFFIX));
+	vertices.add();
+	
+	std::vector<int>::const_iterator index_range_start = indices.begin();
+	std::vector<int>::const_iterator material_it = material_ids.begin();
+	int previous_material_id = -1;
+	for (std::vector<int>::const_iterator it = indices.begin(); ; it += 3) {
+		const int current_material_id = *(material_it++);
+		const int num_triangles = std::distance(index_range_start, it) / 3;
+		if ((previous_material_id != current_material_id && num_triangles > 0) || (it == indices.end())) {
+			COLLADASW::Triangles triangles(mSW);
+			triangles.setMaterial(materials[previous_material_id].name());
+			triangles.setCount(num_triangles);
+			int offset = 0;
+			triangles.getInputList().push_back(COLLADASW::Input(COLLADASW::InputSemantic::VERTEX,"#" + mesh_id + COLLADASW::LibraryGeometries::VERTICES_ID_SUFFIX, offset++ ) );
+			if (has_normals) {
+				triangles.getInputList().push_back(COLLADASW::Input(COLLADASW::InputSemantic::NORMAL,"#" + mesh_id + COLLADASW::LibraryGeometries::NORMALS_SOURCE_ID_SUFFIX, offset++ ) );
+			}
+			triangles.prepareToAppendValues();
+			for (std::vector<int>::const_iterator jt = index_range_start; jt != it; ++jt) {
+				const int idx = *jt;
+				if (has_normals) {
+					triangles.appendValues(idx, idx);
+				} else {
+					triangles.appendValues(idx);
+				}
+			}
+			triangles.finish();
+			index_range_start = it;
+		}
+		previous_material_id = current_material_id;
+		if (it == indices.end()) {
+			break;
+		}
+	}
+
+	closeMesh();
+	closeGeometry();
+}
+
+void ColladaSerializer::ColladaExporter::ColladaGeometries::close() {
+	closeLibrary();
+}
+			
+void ColladaSerializer::ColladaExporter::ColladaScene::add(const std::string& node_id, const std::string& node_name, const std::string& geom_name, const std::vector<std::string>& material_ids, const std::vector<double>& matrix) {
+	if (!scene_opened) {
+		openVisualScene(scene_id);
+		scene_opened = true;
+	}
+			
+	COLLADASW::Node node(mSW);
+	node.setNodeId(node_id);
+	node.setNodeName(node_name);
+	node.setType(COLLADASW::Node::NODE);
+
+	// The matrix attribute of an entity is basically a 4x3 representation of its ObjectPlacement.
+	// Note that this placement is absolute, ie it is multiplied with all parent placements.
+	double matrix_array[4][4] = {
+		{matrix[0], matrix[3], matrix[6], matrix[ 9]},
+		{matrix[1], matrix[4], matrix[7], matrix[10]},
+		{matrix[2], matrix[5], matrix[8], matrix[11]},
+		{        0,         0,         0,          1}
+	};
+
+	node.start();
+	node.addMatrix(matrix_array);
+	COLLADASW::InstanceGeometry instanceGeometry(mSW);
+	instanceGeometry.setUrl ("#" + geom_name);
+	for (std::vector<std::string>::const_iterator it = material_ids.begin(); it != material_ids.end(); ++it) {
+		COLLADASW::InstanceMaterial material (*it, "#" + *it);
+		instanceGeometry.getBindMaterial().getInstanceMaterialList().push_back(material);
+	}
+	instanceGeometry.add();
+	node.end();
+}
+
+void ColladaSerializer::ColladaExporter::ColladaScene::write() {
+	if (scene_opened) {
+		closeVisualScene();
+		closeLibrary();
+
+		COLLADASW::Scene scene (mSW, COLLADASW::URI ("#" + scene_id));
+		scene.add();		
+	}
+}
+		
+void ColladaSerializer::ColladaExporter::ColladaMaterials::ColladaEffects::write(const IfcGeom::Material& material) {
+	openEffect(collada_id(material.name()) + "-fx");
+	COLLADASW::EffectProfile effect(mSW);
+	effect.setShaderType(COLLADASW::EffectProfile::LAMBERT);
+	if (material.hasDiffuse()) {
+		const double* diffuse = material.diffuse();
+		effect.setDiffuse(COLLADASW::ColorOrTexture(COLLADASW::Color(diffuse[0],diffuse[1],diffuse[2])));
+	}
+	if (material.hasSpecular()) {
+		const double* specular = material.specular();
+		effect.setSpecular(COLLADASW::ColorOrTexture(COLLADASW::Color(specular[0],specular[1],specular[2])));
+	}
+	if (material.hasSpecularity()) {
+		effect.setShininess(material.specularity());
+	}
+	if (material.hasTransparency()) {
+		const double transparency = material.transparency();
+		if (transparency > 0) {
+			// The default opacity mode for Collada is A_ONE, which apparently indicates a
+			// transparency value of 1 to be fully opaque. Hence transparency is inverted.
+			effect.setTransparency(1.0 - transparency);
+		}
+	}
+	addEffectProfile(effect);
+	closeEffect();
+}
+
+void ColladaSerializer::ColladaExporter::ColladaMaterials::ColladaEffects::close() {
+	closeLibrary();
+}
+			
+void ColladaSerializer::ColladaExporter::ColladaMaterials::add(const IfcGeom::Material& material) {
+	if (!contains(material)) {
+		effects.write(material);
+		materials.push_back(material);
+	}
+}
+
+bool ColladaSerializer::ColladaExporter::ColladaMaterials::contains(const IfcGeom::Material& material) {
+	return std::find(materials.begin(), materials.end(), material) != materials.end();
+}
+
+void ColladaSerializer::ColladaExporter::ColladaMaterials::write() {
+	effects.close();
+	for (std::vector<IfcGeom::Material>::const_iterator it = materials.begin(); it != materials.end(); ++it) {
+		const std::string& material_name = collada_id((*it).name());
+		openMaterial(material_name);
+		addInstanceEffect("#" + material_name + "-fx");
+		closeMaterial();
+	}
+	closeLibrary();
+}
+		
+void ColladaSerializer::ColladaExporter::startDocument(const std::string& unit_name, float unit_magnitude) {
+	stream.startDocument();
+
+	COLLADASW::Asset asset(&stream);
+	asset.getContributor().mAuthoringTool = std::string("IfcOpenShell ") + IFCOPENSHELL_VERSION;
+	asset.setUnit(unit_name, unit_magnitude);
+	asset.setUpAxisType(COLLADASW::Asset::Z_UP);
+	asset.add();
+}
+
+void ColladaSerializer::ColladaExporter::write(const std::string& guid, const std::string& name, const std::string& type, int obj_id, const std::vector<double>& matrix, const std::vector<double>& vertices, const std::vector<double>& normals, const std::vector<int>& indices, const std::vector<int>& material_ids, const std::vector<IfcGeom::Material>& _materials) {
+	std::vector<std::string> material_references;
+	for (std::vector<IfcGeom::Material>::const_iterator it = _materials.begin(); it != _materials.end(); ++it) {
+		const IfcGeom::Material& material = *it;
+		if (!materials.contains(material)) {
+			materials.add(material);
+		}
+		material_references.push_back(collada_id(material.name()));
+	}
+	deferreds.push_back(DeferredObject(guid, name, type, obj_id, matrix, vertices, normals, indices, material_ids, _materials, material_references));
+}
+
+const std::string ColladaSerializer::ColladaExporter::DeferredObject::Name() const {
+	std::stringstream ss;
+	if (!this->name.empty()) {
+		ss << this->obj_id << "_" << this->name;
+	} else {
+		ss << this->guid;
+	}
+	return collada_id(ss.str());
+}
+
+void ColladaSerializer::ColladaExporter::endDocument() {
+	// In fact due the XML based nature of Collada and its dependency on library nodes,
+	// only at this point all objects are written to the stream.
+	materials.write();
+	for (std::vector<DeferredObject>::const_iterator it = deferreds.begin(); it != deferreds.end(); ++it) {
+		const std::string object_name = it->Name();
+		geometries.write(object_name, it->type, it->vertices, it->normals, it->indices, it->material_ids, it->materials);
+	}
+	geometries.close();
+	for (std::vector<DeferredObject>::const_iterator it = deferreds.begin(); it != deferreds.end(); ++it) {
+		const std::string object_name = it->Name();
+		scene.add(object_name + "-instance", object_name, object_name, it->material_references, it->matrix);
+	}
+	scene.write();
+	stream.endDocument();
+}
+	
+bool ColladaSerializer::ready() {
+	return true;
+}
+
+void ColladaSerializer::writeHeader() {
+	exporter.startDocument(unit_name, unit_magnitude);
+}
+
+void ColladaSerializer::write(const IfcGeom::TriangulationElement<double>* o) {
+	const IfcGeom::Representation::Triangulation<double>& mesh = o->geometry();
+	exporter.write(o->guid(), o->name(), o->type(), o->id(), o->transformation().matrix().data(), mesh.verts(), mesh.normals(), mesh.faces(), mesh.material_ids(), mesh.materials());
+}
+
+void ColladaSerializer::finalize() {
+	exporter.endDocument();
+}
+
+#endif

src/ifcconvert/ColladaSerializer.h

@@ -0,0 +1,165 @@
+/********************************************************************************
+ *                                                                              *
+ * This file is part of IfcOpenShell.                                           *
+ *                                                                              *
+ * IfcOpenShell is free software: you can redistribute it and/or modify         *
+ * it under the terms of the Lesser GNU General Public License as published by  *
+ * the Free Software Foundation, either version 3.0 of the License, or          *
+ * (at your option) any later version.                                          *
+ *                                                                              *
+ * IfcOpenShell is distributed in the hope that it will be useful,              *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of               *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                 *
+ * Lesser GNU General Public License for more details.                          *
+ *                                                                              *
+ * You should have received a copy of the Lesser GNU General Public License     *
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.         *
+ *                                                                              *
+ ********************************************************************************/
+
+#ifdef WITH_OPENCOLLADA
+
+#ifndef COLLADASERIALIZER_H
+#define COLLADASERIALIZER_H
+
+#include <COLLADASWStreamWriter.h>
+#include <COLLADASWPrimitves.h>
+#include <COLLADASWLibraryGeometries.h>
+#include <COLLADASWSource.h>
+#include <COLLADASWScene.h>
+#include <COLLADASWNode.h>
+#include <COLLADASWInstanceGeometry.h>
+#include <COLLADASWLibraryVisualScenes.h>
+#include <COLLADASWLibraryEffects.h>
+#include <COLLADASWLibraryMaterials.h>
+#include <COLLADASWBaseInputElement.h>
+#include <COLLADASWAsset.h>
+
+#include "../ifcgeom/IfcGeomIterator.h"
+
+#include "../ifcconvert/GeometrySerializer.h"
+
+class ColladaSerializer : public GeometrySerializer
+{
+private:
+	class ColladaExporter
+	{
+	private:
+		class ColladaGeometries : public COLLADASW::LibraryGeometries
+		{
+		public:
+			explicit ColladaGeometries(COLLADASW::StreamWriter& stream)
+				: COLLADASW::LibraryGeometries(&stream)
+			{}
+			void addFloatSource(const std::string& mesh_id, const std::string& suffix, const std::vector<double>& floats, const char* coords = "XYZ");
+			void write(const std::string mesh_id, const std::string& default_material_name, const std::vector<double>& positions, const std::vector<double>& normals, const std::vector<int>& indices, const std::vector<int> material_ids, const std::vector<IfcGeom::Material>& materials);
+			void close();
+		};
+		class ColladaScene : public COLLADASW::LibraryVisualScenes
+		{
+		private:
+			const std::string scene_id;
+			bool scene_opened;
+		public:
+			ColladaScene(const std::string& scene_id, COLLADASW::StreamWriter& stream)
+				: COLLADASW::LibraryVisualScenes(&stream)
+				, scene_id(scene_id)
+				, scene_opened(false)			
+			{}
+			void add(const std::string& node_id, const std::string& node_name, const std::string& geom_name, const std::vector<std::string>& material_ids, const std::vector<double>& matrix);
+			void write();
+		};
+		class ColladaMaterials : public COLLADASW::LibraryMaterials
+		{
+		private:
+			class ColladaEffects : public COLLADASW::LibraryEffects
+			{
+			public:
+				explicit ColladaEffects(COLLADASW::StreamWriter& stream)
+					: COLLADASW::LibraryEffects(&stream)
+				{}
+				void write(const IfcGeom::Material& material);
+				void close();
+			};
+			std::vector<IfcGeom::Material> materials;
+			ColladaEffects effects;
+		public:
+			explicit ColladaMaterials(COLLADASW::StreamWriter& stream)
+				: COLLADASW::LibraryMaterials(&stream)
+				, effects(stream)
+			{}
+			void add(const IfcGeom::Material& material);
+			bool contains(const IfcGeom::Material& material);
+			void write();
+		};
+		class DeferredObject {
+		public:
+			std::string guid, name, type;
+			int obj_id;
+			std::vector<double> matrix;
+			std::vector<double> vertices;
+			std::vector<double> normals;
+			std::vector<int> indices;
+			std::vector<int> material_ids;
+			std::vector<IfcGeom::Material> materials;
+			std::vector<std::string> material_references;
+			DeferredObject(const std::string& guid, const std::string& name, const std::string& type, int obj_id, const std::vector<double>& matrix, const std::vector<double>& vertices,
+				const std::vector<double>& normals, const std::vector<int>& indices, const std::vector<int>& material_ids, 
+				const std::vector<IfcGeom::Material>& materials, const std::vector<std::string>& material_references)
+				: guid(guid)
+				, name(name)
+				, type(type)
+				, obj_id(obj_id)
+				, matrix(matrix)
+				, vertices(vertices)
+				, normals(normals)
+				, indices(indices)
+				, material_ids(material_ids)
+				, materials(materials)
+				, material_references(material_references)
+			{}
+			const std::string Name() const;
+		};
+		COLLADABU::NativeString filename;
+		COLLADASW::StreamWriter stream;
+		ColladaGeometries geometries;
+		ColladaScene scene;
+		ColladaMaterials materials;
+	public:
+		ColladaExporter(const std::string& scene_name, const std::string& fn)
+			: filename(fn.c_str())
+			, stream(filename)
+			, geometries(stream)
+			, scene(scene_name, stream)
+			, materials(stream)
+		{}
+		std::vector<DeferredObject> deferreds;
+		virtual ~ColladaExporter() {}
+		void startDocument(const std::string& unit_name, float unit_magnitude);
+		void write(const std::string& guid, const std::string& name, const std::string& type, int obj_id, const std::vector<double>& matrix, const std::vector<double>& vertices, const std::vector<double>& normals, const std::vector<int>& indices, const std::vector<int>& material_ids, const std::vector<IfcGeom::Material>& materials);
+		void endDocument();
+	};
+	ColladaExporter exporter;
+	std::string unit_name;
+	float unit_magnitude;
+public:
+	ColladaSerializer(const std::string& dae_filename)
+		: GeometrySerializer()
+		, exporter("IfcOpenShell", dae_filename)
+	{}
+	bool ready();
+	void writeHeader();
+	void write(const IfcGeom::TriangulationElement<double>* o);
+	void write(const IfcGeom::BRepElement<double>* o) {}
+	void finalize();
+	bool isTesselated() const { return true; }
+	void setUnitNameAndMagnitude(const std::string& name, float magnitude) {
+		unit_name = name;
+		unit_magnitude = magnitude;
+	}
+	void setFile(IfcParse::IfcFile*) {}
+};
+
+#endif
+
+#endif

src/ifcconvert/GeometrySerializer.h

@@ -0,0 +1,36 @@
+/********************************************************************************
+ *                                                                              *
+ * This file is part of IfcOpenShell.                                           *
+ *                                                                              *
+ * IfcOpenShell is free software: you can redistribute it and/or modify         *
+ * it under the terms of the Lesser GNU General Public License as published by  *
+ * the Free Software Foundation, either version 3.0 of the License, or          *
+ * (at your option) any later version.                                          *
+ *                                                                              *
+ * IfcOpenShell is distributed in the hope that it will be useful,              *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of               *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                 *
+ * Lesser GNU General Public License for more details.                          *
+ *                                                                              *
+ * You should have received a copy of the Lesser GNU General Public License     *
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.         *
+ *                                                                              *
+ ********************************************************************************/
+
+#ifndef GEOMETRYSERIALIZER_H
+#define GEOMETRYSERIALIZER_H
+
+#include "../ifcconvert/Serializer.h"
+#include "../ifcgeom/IfcGeomIterator.h"
+
+class GeometrySerializer : public Serializer {
+public:
+	virtual ~GeometrySerializer() {} 
+
+	virtual bool isTesselated() const = 0;
+	virtual void write(const IfcGeom::TriangulationElement<double>* o) = 0;
+	virtual void write(const IfcGeom::BRepElement<double>* o) = 0;
+	virtual void setUnitNameAndMagnitude(const std::string& name, float magnitude) = 0;
+};
+
+#endif

src/ifcconvert/IfcConvert.cpp

@@ -0,0 +1,356 @@
+/********************************************************************************
+ *                                                                              *
+ * This file is part of IfcOpenShell.                                           *
+ *                                                                              *
+ * IfcOpenShell is free software: you can redistribute it and/or modify         *
+ * it under the terms of the Lesser GNU General Public License as published by  *
+ * the Free Software Foundation, either version 3.0 of the License, or          *
+ * (at your option) any later version.                                          *
+ *                                                                              *
+ * IfcOpenShell is distributed in the hope that it will be useful,              *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of               *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                 *
+ * Lesser GNU General Public License for more details.                          *
+ *                                                                              *
+ * You should have received a copy of the Lesser GNU General Public License     *
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.         *
+ *                                                                              *
+ ********************************************************************************/
+
+/********************************************************************************
+ *                                                                              *
+ * This started as a brief example of how IfcOpenShell can be interfaced from   * 
+ * within a C++ context, it has since then evolved into a fullfledged command   *
+ * line application that is able to convert geometry in an IFC files into       *
+ * several tesselated and topological output formats.                           *
+ *                                                                              *
+ ********************************************************************************/
+
+#include <fstream>
+#include <sstream>
+#include <set>
+#include <time.h>
+
+#include <boost/program_options.hpp>
+
+#include "../ifcgeom/IfcGeomIterator.h"
+
+#include "../ifcconvert/ColladaSerializer.h"
+#include "../ifcconvert/IgesSerializer.h"
+#include "../ifcconvert/StepSerializer.h"
+#include "../ifcconvert/WavefrontObjSerializer.h"
+#include "../ifcconvert/XmlSerializer.h"
+
+void printVersion() {
+	std::cerr << "IfcOpenShell IfcConvert " << IFCOPENSHELL_VERSION << std::endl;
+}
+
+void printUsage(const boost::program_options::options_description& generic_options, const boost::program_options::options_description& geom_options) {
+	printVersion();
+	std::cerr << "Usage: IfcConvert [options] <input.ifc> [<output>]" << std::endl
+	          << std::endl
+	          << "Converts the geometry in an IFC file into one of the following formats:" << std::endl
+	          << "  .obj   WaveFront OBJ  (a .mtl file is also created)" << std::endl;
+#ifdef WITH_OPENCOLLADA	          
+	std::cerr << "  .dae   Collada        Digital Assets Exchange" << std::endl;
+#endif
+	std::cerr << "  .stp   STEP           Standard for the Exchange of Product Data" << std::endl
+	          << "  .igs   IGES           Initial Graphics Exchange Specification" << std::endl
+	          << "  .xml   XML            Property definitions and decomposition tree" << std::endl
+	          << std::endl
+	          << "Command line options" << std::endl << generic_options << std::endl
+	          << "Advanced options" << std::endl << geom_options << std::endl;
+}
+
+std::string change_extension(const std::string& fn, const std::string& ext) {
+	std::string::size_type dot = fn.find_last_of('.');
+	if (dot != std::string::npos) {
+		return fn.substr(0,dot+1) + ext;
+	} else {
+		return fn + "." + ext;
+	}
+}
+
+static std::stringstream log_stream;
+void write_log();
+
+int main(int argc, char** argv) {
+	boost::program_options::options_description generic_options;
+	generic_options.add_options()
+		("help", "display usage information")
+		("version", "display version information")
+		("verbose,v", "more verbose output");
+
+	boost::program_options::options_description fileio_options;
+	fileio_options.add_options()
+		("input-file", boost::program_options::value<std::string>(), "input IFC file")
+		("output-file", boost::program_options::value<std::string>(), "output geometry file");
+
+	std::vector<std::string> entity_vector;
+	boost::program_options::options_description geom_options;
+	geom_options.add_options()
+		("weld-vertices",
+			"Specifies whether vertices are welded, meaning that the coordinates "
+			"vector will only contain unique xyz-triplets. This results in a "
+			"manifold mesh which is useful for modelling applications, but might "
+			"result in unwanted shading artefacts in rendering applications.")
+		("use-world-coords", 
+			"Specifies whether to apply the local placements of building elements "
+			"directly to the coordinates of the representation mesh rather than "
+			"to represent the local placement in the 4x3 matrix, which will in that "
+			"case be the identity matrix.")
+		("convert-back-units",
+			"Specifies whether to convert back geometrical output back to the "
+			"unit of measure in which it is defined in the IFC file. Default is "
+			"to use meters.")
+		("sew-shells", 
+			"Specifies whether to sew the faces of IfcConnectedFaceSets together. "
+			"This is a potentially time consuming operation, but guarantees a "
+			"consistent orientation of surface normals, even if the faces are not "
+			"properly oriented in the IFC file.")
+		("merge-boolean-operands", 
+			"Specifies whether to merge all IfcOpeningElement operands into a single "
+			"operand before applying the subtraction operation. This may "
+			"introduce a performance improvement at the risk of failing, in "
+			"which case the subtraction is applied one-by-one.")
+		("force-ccw-face-orientation", 
+			"Recompute topological face normals using Newell's Method to "
+			"guarantee that face vertices are defined in a Counter Clock "
+			"Wise order, even if the faces are not part of a closed shell.")
+		("disable-opening-subtractions", 
+			"Specifies whether to disable the boolean subtraction of "
+			"IfcOpeningElement Representations from their RelatingElements.")
+		("include", 
+			"Specifies that the entities listed after --entities are to be included")
+		("exclude", 
+			"Specifies that the entities listed after --entities are to be excluded")
+		("entities", boost::program_options::value< std::vector<std::string> >(&entity_vector)->multitoken(), 
+			"A list of entities that should be included in or excluded from the "
+			"geometrical output, depending on whether --ignore or --include is "
+			"specified. Defaults to IfcOpeningElement and IfcSpace to be excluded.");
+	
+	boost::program_options::options_description cmdline_options;
+	cmdline_options.add(generic_options).add(fileio_options).add(geom_options);
+
+	boost::program_options::positional_options_description positional_options;
+	positional_options.add("input-file", 1);
+	positional_options.add("output-file", 1);
+
+	boost::program_options::variables_map vmap;
+	try {
+		boost::program_options::store(boost::program_options::command_line_parser(argc, argv).
+				  options(cmdline_options).positional(positional_options).run(), vmap);
+	} catch (const boost::program_options::unknown_option& e) {
+		std::cerr << "[Error] Unknown option '" << e.get_option_name() << "'" << std::endl << std::endl;
+		// Usage information will be emitted below
+	} catch (...) {
+		// Catch other errors such as invalid command line syntax
+	}
+	boost::program_options::notify(vmap);
+
+	if (vmap.count("version")) {
+		printVersion();
+		return 0;
+	} else if (vmap.count("help") || !vmap.count("input-file")) {
+		printUsage(generic_options, geom_options);
+		return vmap.count("help") ? 0 : 1;
+	} else if (vmap.count("include") && vmap.count("exclude")) {
+		std::cerr << "[Error] --include and --ignore can not be specified together" << std::endl;
+		printUsage(generic_options, geom_options);
+		return 1;
+	}
+
+	const bool verbose = vmap.count("verbose") != 0;
+	const bool weld_vertices = vmap.count("weld-vertices") != 0;
+	const bool use_world_coords = vmap.count("use-world-coords") != 0;
+	const bool convert_back_units = vmap.count("convert-back-units") != 0;
+	const bool sew_shells = vmap.count("sew-shells") != 0;
+	const bool merge_boolean_operands = vmap.count("merge-boolean-operands") != 0;
+	const bool force_ccw_face_orientation = vmap.count("force-ccw-face-orientation") != 0;
+	const bool disable_opening_subtractions = vmap.count("disable-opening-subtractions") != 0;
+	const bool include_entities = vmap.count("include") != 0;
+
+	// Gets the set ifc types to be ignored from the command line. 
+	std::set<std::string> entities;
+	for (std::vector<std::string>::const_iterator it = entity_vector.begin(); it != entity_vector.end(); ++it) {
+		std::string lowercase_type = *it;
+		for (std::string::iterator c = lowercase_type.begin(); c != lowercase_type.end(); ++c) {
+			*c = tolower(*c);
+		}
+		entities.insert(lowercase_type);
+	}
+
+	// If no entities are specified these are the defaults to skip from output
+	if (entity_vector.empty()) {
+		entities.insert("ifcopeningelement");
+		entities.insert("ifcspace");
+	}
+	
+	const std::string input_filename = vmap["input-file"].as<std::string>();
+	// If no output filename is specified a Wavefront OBJ file will be output
+	// to maintain backwards compatibility with the obsolete IfcObj executable.
+	const std::string output_filename = vmap.count("output-file") == 1 
+		? vmap["output-file"].as<std::string>()
+		: change_extension(input_filename, "obj");
+	
+	if (output_filename.size() < 5) {
+		printUsage(generic_options, geom_options);
+		return 1;
+	}
+
+	std::string output_extension = output_filename.substr(output_filename.size()-4);
+	for (std::string::iterator c = output_extension.begin(); c != output_extension.end(); ++c) {
+		*c = tolower(*c);
+	}
+
+	Logger::SetOutput(&std::cout, &log_stream);
+	Logger::Verbosity(verbose ? Logger::LOG_NOTICE : Logger::LOG_ERROR);
+
+	if (output_extension == ".xml") {
+		int exit_code = 1;
+		try {
+			XmlSerializer s(output_filename);
+			IfcParse::IfcFile f;
+			if (!f.Init(input_filename)) {
+				Logger::Message(Logger::LOG_ERROR, "Unable to parse .ifc file");
+			} else {
+				s.setFile(&f);
+				s.finalize();
+				exit_code = 0;
+			}
+		} catch (...) {}
+		write_log();
+		return exit_code;
+	}
+
+	IfcGeom::IteratorSettings settings;
+
+	settings.set(IfcGeom::IteratorSettings::APPLY_DEFAULT_MATERIALS,      true);
+	settings.set(IfcGeom::IteratorSettings::USE_WORLD_COORDS,             use_world_coords);
+	settings.set(IfcGeom::IteratorSettings::WELD_VERTICES,                weld_vertices);
+	settings.set(IfcGeom::IteratorSettings::SEW_SHELLS,                   sew_shells);
+	settings.set(IfcGeom::IteratorSettings::CONVERT_BACK_UNITS,           convert_back_units);
+	settings.set(IfcGeom::IteratorSettings::FASTER_BOOLEANS,              merge_boolean_operands);
+	settings.set(IfcGeom::IteratorSettings::FORCE_CCW_FACE_ORIENTATION,   force_ccw_face_orientation);
+	settings.set(IfcGeom::IteratorSettings::DISABLE_OPENING_SUBTRACTIONS, disable_opening_subtractions);
+
+	GeometrySerializer* serializer;
+	if (output_extension == ".obj") {
+		const std::string mtl_filename = output_filename.substr(0,output_filename.size()-3) + "mtl";
+		if (!use_world_coords) {
+			Logger::Message(Logger::LOG_NOTICE, "Using world coords when writing WaveFront OBJ files");
+			settings.set(IfcGeom::IteratorSettings::USE_WORLD_COORDS, true);
+		}
+		serializer = new WaveFrontOBJSerializer(output_filename, mtl_filename);
+#ifdef WITH_OPENCOLLADA
+	} else if (output_extension == ".dae") {
+		serializer = new ColladaSerializer(output_filename);
+#endif
+	} else if (output_extension == ".stp") {
+		serializer = new StepSerializer(output_filename);
+	} else if (output_extension == ".igs") {
+		// Not sure why this is needed, but it is.
+		// See: http://tracker.dev.opencascade.org/view.php?id=23679
+		IGESControl_Controller::Init();
+		serializer = new IgesSerializer(output_filename);
+	} else {
+		Logger::Message(Logger::LOG_ERROR, "Unknown output filename extension");
+		write_log();
+		printUsage(generic_options, geom_options);
+		return 1;
+	}
+
+	if (!serializer->isTesselated()) {
+		if (weld_vertices) {
+			Logger::Message(Logger::LOG_NOTICE, "Weld vertices setting ignored when writing STEP or IGES files");
+		}
+		settings.disable_triangulation() = true;
+	}
+
+	IfcGeom::Iterator<double> context_iterator(settings, input_filename);
+
+	try {
+		if (include_entities) {
+			context_iterator.includeEntities(entities);
+		} else {
+			context_iterator.excludeEntities(entities);
+		}
+	} catch (const IfcParse::IfcException& e) {
+		std::cout << "[Error] " << e.what() << std::endl;
+		return 1;
+	}
+
+	if (!serializer->ready()) {
+		Logger::Message(Logger::LOG_ERROR, "Unable to open output file for writing");
+		write_log();
+		return 1;
+	}
+
+	time_t start,end;
+	time(&start);
+	
+	if (!context_iterator.findContext()) {
+		Logger::Message(Logger::LOG_ERROR, "Unable to parse .ifc file or no geometrical entities found");
+		write_log();
+		return 1;
+	}
+
+	if (convert_back_units) {
+		serializer->setUnitNameAndMagnitude(context_iterator.getUnitName(), static_cast<const float>(context_iterator.getUnitMagnitude()));
+	} else {
+		serializer->setUnitNameAndMagnitude("METER", 1.0f);
+	}
+
+	serializer->writeHeader();
+
+	std::set<std::string> materials;
+
+	int old_progress = -1;
+	Logger::Status("Creating geometry...");
+
+	// The functions IfcGeom::Iterator::get() and IfcGeom::Iterator::next() 
+	// wrap an iterator of all geometrical products in the Ifc file. 
+	// IfcGeom::Iterator::get() returns an IfcGeom::TriangulationElement or 
+	// -BRepElement pointer, based on current settings. (see IfcGeomIterator.h 
+	// for definition) IfcGeom::Iterator::next() is used to poll whether more 
+	// geometrical entities are available. None of these functions throw 
+	// exceptions, neither for parsing errors or geometrical errors. Upon 
+	// calling next() the entity to be returned has already been processed, a 
+	// true return value guarantees that a successfully processed product is 
+	// available. 
+	do {
+		const IfcGeom::Element<double>* geom_object = context_iterator.get();
+		
+		if (serializer->isTesselated()) {
+			serializer->write(static_cast<const IfcGeom::TriangulationElement<double>*>(geom_object));
+		} else {
+			serializer->write(static_cast<const IfcGeom::BRepElement<double>*>(geom_object));
+		}
+		
+		const int progress = context_iterator.progress() / 2;
+		if (old_progress!= progress) Logger::ProgressBar(progress);
+		old_progress = progress;
+	
+	} while (context_iterator.next());
+
+	serializer->finalize();
+	delete serializer;
+
+	Logger::Status("\rDone creating geometry                                ");
+
+	write_log();
+
+	time(&end);
+	int dif = (int) difftime (end,start);	
+	printf ("\nConversion took %d seconds\n", dif );
+
+	return 0;
+}
+
+void write_log() {
+	std::string log = log_stream.str();
+	if (!log.empty()) {
+		std::cerr << std::endl << "Log:" << std::endl;
+		std::cerr << log << std::endl;
+	}
+}

src/ifcconvert/IgesSerializer.h

@@ -0,0 +1,54 @@
+/********************************************************************************
+ *                                                                              *
+ * This file is part of IfcOpenShell.                                           *
+ *                                                                              *
+ * IfcOpenShell is free software: you can redistribute it and/or modify         *
+ * it under the terms of the Lesser GNU General Public License as published by  *
+ * the Free Software Foundation, either version 3.0 of the License, or          *
+ * (at your option) any later version.                                          *
+ *                                                                              *
+ * IfcOpenShell is distributed in the hope that it will be useful,              *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of               *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                 *
+ * Lesser GNU General Public License for more details.                          *
+ *                                                                              *
+ * You should have received a copy of the Lesser GNU General Public License     *
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.         *
+ *                                                                              *
+ ********************************************************************************/
+
+#ifndef IGESSERIALIZER_H
+#define IGESSERIALIZER_H
+
+#include <IGESControl_Controller.hxx>
+#include <IGESControl_Writer.hxx>
+#include <Interface_Static.hxx>
+
+#include "../ifcgeom/IfcGeomIterator.h"
+
+#include "../ifcconvert/OpenCascadeBasedSerializer.h"
+
+class IgesSerializer : public OpenCascadeBasedSerializer
+{
+private:
+	IGESControl_Writer writer;	
+public:
+	explicit IgesSerializer(const std::string& out_filename) 
+		: OpenCascadeBasedSerializer(out_filename) 
+	{}
+	virtual ~IgesSerializer() {}
+	void writeShape(const TopoDS_Shape& shape) {
+		writer.AddShape(shape);
+	}
+	void finalize() {
+		writer.Write(out_filename.c_str());
+	}
+	void setUnitNameAndMagnitude(const std::string& name, float magnitude) {
+		const char* symbol = getSymbolForUnitMagnitude(magnitude);
+		if (symbol) {
+			Interface_Static::SetCVal("write.iges.unit", symbol);
+		}
+	}
+};
+
+#endif

src/ifcconvert/OpenCascadeBasedSerializer.cpp

@@ -0,0 +1,92 @@
+/********************************************************************************
+ *                                                                              *
+ * This file is part of IfcOpenShell.                                           *
+ *                                                                              *
+ * IfcOpenShell is free software: you can redistribute it and/or modify         *
+ * it under the terms of the Lesser GNU General Public License as published by  *
+ * the Free Software Foundation, either version 3.0 of the License, or          *
+ * (at your option) any later version.                                          *
+ *                                                                              *
+ * IfcOpenShell is distributed in the hope that it will be useful,              *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of               *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                 *
+ * Lesser GNU General Public License for more details.                          *
+ *                                                                              *
+ * You should have received a copy of the Lesser GNU General Public License     *
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.         *
+ *                                                                              *
+ ********************************************************************************/
+
+#include <string>
+#include <fstream>
+#include <cstdio>
+
+#include <BRepBuilderAPI_GTransform.hxx>
+#include <BRepBuilderAPI_Transform.hxx>
+
+#include <Standard_Version.hxx>
+
+#include "OpenCascadeBasedSerializer.h"
+
+bool OpenCascadeBasedSerializer::ready() {
+	std::ofstream test_file(out_filename.c_str(), std::ios_base::binary);
+	bool succeeded = test_file.is_open();
+	test_file.close();
+	remove(out_filename.c_str());
+	return succeeded;
+}
+
+void OpenCascadeBasedSerializer::write(const IfcGeom::BRepElement<double>* o) {		
+	for (IfcGeom::IfcRepresentationShapeItems::const_iterator it = o->geometry().begin(); it != o->geometry().end(); ++ it) {
+		gp_GTrsf gtrsf = it->Placement();
+
+		const std::vector<double>& matrix = o->transformation().matrix().data();
+		
+		// Convert the matrix back into a transformation object. The tolerance values
+		// are taken into consideration to reconstruct the form of the transformation.
+		gp_Trsf o_trsf;
+		o_trsf.SetValues(
+			matrix[0], matrix[3], matrix[6], matrix[ 9],
+			matrix[1], matrix[4], matrix[7], matrix[10], 
+			matrix[2], matrix[5], matrix[8], matrix[11]
+#if OCC_VERSION_HEX < 0x60800
+			, Precision::Angular(), Precision::Confusion()
+#endif
+		);
+		gtrsf.PreMultiply(o_trsf);
+		
+		const TopoDS_Shape& s = it->Shape();			
+			
+		bool trsf_valid = false;
+		gp_Trsf trsf;
+		try {
+			trsf = gtrsf.Trsf();
+			trsf_valid = true;
+		} catch (...) {}
+			
+		const TopoDS_Shape moved_shape = trsf_valid
+			? BRepBuilderAPI_Transform(s, trsf, true).Shape()
+			: BRepBuilderAPI_GTransform(s, gtrsf, true).Shape();
+			
+		writeShape(moved_shape);
+	}
+}
+
+#define RATHER_SMALL (1e-3)
+#define APPROXIMATELY_THE_SAME(a,b) (fabs(a-b) < RATHER_SMALL)
+
+const char* OpenCascadeBasedSerializer::getSymbolForUnitMagnitude(float mag) {
+	if (APPROXIMATELY_THE_SAME(mag, 0.001f)) {
+		return "MM";
+	} else if (APPROXIMATELY_THE_SAME(mag, 0.01f)) {
+		return "CM";
+	} else if (APPROXIMATELY_THE_SAME(mag, 1.0f)) {
+		return "M";
+	} else if (APPROXIMATELY_THE_SAME(mag, 0.3048f)) {
+		return "FT";
+	} else if (APPROXIMATELY_THE_SAME(mag, 0.0254f)) {
+		return "INCH";
+	} else {
+		return 0;
+	}
+}

src/ifcconvert/OpenCascadeBasedSerializer.h

@@ -0,0 +1,47 @@
+/********************************************************************************
+ *                                                                              *
+ * This file is part of IfcOpenShell.                                           *
+ *                                                                              *
+ * IfcOpenShell is free software: you can redistribute it and/or modify         *
+ * it under the terms of the Lesser GNU General Public License as published by  *
+ * the Free Software Foundation, either version 3.0 of the License, or          *
+ * (at your option) any later version.                                          *
+ *                                                                              *
+ * IfcOpenShell is distributed in the hope that it will be useful,              *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of               *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                 *
+ * Lesser GNU General Public License for more details.                          *
+ *                                                                              *
+ * You should have received a copy of the Lesser GNU General Public License     *
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.         *
+ *                                                                              *
+ ********************************************************************************/
+
+#ifndef OPENCASCADEBASEDSERIALIZER_H
+#define OPENCASCADEBASEDSERIALIZER_H
+
+#include "../ifcgeom/IfcGeomIterator.h"
+
+#include "../ifcconvert/GeometrySerializer.h"
+
+class OpenCascadeBasedSerializer : public GeometrySerializer {
+protected:
+	const std::string& out_filename;
+	const char* getSymbolForUnitMagnitude(float mag);
+public:
+	explicit OpenCascadeBasedSerializer(const std::string& out_filename)
+		: GeometrySerializer()
+		, out_filename(out_filename)
+	{}
+	virtual ~OpenCascadeBasedSerializer() {}
+	void writeHeader() {}
+	void writeMaterial(const IfcGeom::SurfaceStyle& style) {}
+	bool ready();
+	virtual void writeShape(const TopoDS_Shape& shape) = 0;
+	void write(const IfcGeom::TriangulationElement<double>* o) {}
+	void write(const IfcGeom::BRepElement<double>* o);
+	bool isTesselated() const { return false; }
+	void setFile(IfcParse::IfcFile*) {}
+};
+
+#endif

src/ifcconvert/Serializer.h

@@ -0,0 +1,35 @@
+/********************************************************************************
+ *                                                                              *
+ * This file is part of IfcOpenShell.                                           *
+ *                                                                              *
+ * IfcOpenShell is free software: you can redistribute it and/or modify         *
+ * it under the terms of the Lesser GNU General Public License as published by  *
+ * the Free Software Foundation, either version 3.0 of the License, or          *
+ * (at your option) any later version.                                          *
+ *                                                                              *
+ * IfcOpenShell is distributed in the hope that it will be useful,              *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of               *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                 *
+ * Lesser GNU General Public License for more details.                          *
+ *                                                                              *
+ * You should have received a copy of the Lesser GNU General Public License     *
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.         *
+ *                                                                              *
+ ********************************************************************************/
+
+#ifndef SERIALIZER_H
+#define SERIALIZER_H
+
+#include "../ifcparse/IfcFile.h"
+
+class Serializer {
+public:
+	virtual ~Serializer() {}
+
+	virtual bool ready() = 0;
+	virtual void writeHeader() = 0;
+	virtual void finalize() = 0;
+	virtual void setFile(IfcParse::IfcFile*) = 0;
+};
+
+#endif

src/ifcconvert/StepSerializer.h

@@ -0,0 +1,60 @@
+/********************************************************************************
+ *                                                                              *
+ * This file is part of IfcOpenShell.                                           *
+ *                                                                              *
+ * IfcOpenShell is free software: you can redistribute it and/or modify         *
+ * it under the terms of the Lesser GNU General Public License as published by  *
+ * the Free Software Foundation, either version 3.0 of the License, or          *
+ * (at your option) any later version.                                          *
+ *                                                                              *
+ * IfcOpenShell is distributed in the hope that it will be useful,              *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of               *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                 *
+ * Lesser GNU General Public License for more details.                          *
+ *                                                                              *
+ * You should have received a copy of the Lesser GNU General Public License     *
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.         *
+ *                                                                              *
+ ********************************************************************************/
+
+#ifndef STEPSERIALIZER_H
+#define STEPSERIALIZER_H
+
+#include <STEPControl_Controller.hxx>
+#include <STEPControl_Writer.hxx>
+#include <Interface_Static.hxx>
+
+#include "../ifcgeom/IfcGeomIterator.h"
+
+#include "../ifcconvert/OpenCascadeBasedSerializer.h"
+
+class StepSerializer : public OpenCascadeBasedSerializer
+{
+private:
+	STEPControl_Writer writer;	
+public:
+	explicit StepSerializer(const std::string& out_filename) 
+		: OpenCascadeBasedSerializer(out_filename) 
+	{}
+	virtual ~StepSerializer() {}
+	void writeShape(const TopoDS_Shape& shape) {
+		std::stringstream ss;
+		std::streambuf *sb = std::cout.rdbuf(ss.rdbuf());
+		writer.Transfer(shape, STEPControl_AsIs);
+		std::cout.rdbuf(sb);
+	}
+	void finalize() {
+		std::stringstream ss;
+		std::streambuf *sb = std::cout.rdbuf(ss.rdbuf());
+		writer.Write(out_filename.c_str());
+		std::cout.rdbuf(sb);
+	}
+	void setUnitNameAndMagnitude(const std::string& name, float magnitude) {
+		const char* symbol = getSymbolForUnitMagnitude(magnitude);
+		if (symbol) {
+			Interface_Static::SetCVal("write.step.unit", symbol);
+		}
+	}
+};
+
+#endif

src/ifcconvert/SurfaceStyle.h

@@ -0,0 +1,78 @@
+/********************************************************************************
+ *                                                                              *
+ * This file is part of IfcOpenShell.                                           *
+ *                                                                              *
+ * IfcOpenShell is free software: you can redistribute it and/or modify         *
+ * it under the terms of the Lesser GNU General Public License as published by  *
+ * the Free Software Foundation, either version 3.0 of the License, or          *
+ * (at your option) any later version.                                          *
+ *                                                                              *
+ * IfcOpenShell is distributed in the hope that it will be useful,              *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of               *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                 *
+ * Lesser GNU General Public License for more details.                          *
+ *                                                                              *
+ * You should have received a copy of the Lesser GNU General Public License     *
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.         *
+ *                                                                              *
+ ********************************************************************************/
+
+/********************************************************************************
+ *                                                                              *
+ * This file defines default materials for several IFC datatypes                *
+ *                                                                              *
+ ********************************************************************************/
+
+#ifndef SURFACESTYLE_H
+#define SURFACESTYLE_H
+
+#include <string>
+#include <sstream>
+
+#include <array>
+
+class SurfaceStyle {
+public:
+	class ColorComponent {
+	private:
+		std::array<double, 3> data;
+	public:
+		ColorComponent(double r, double g, double b) {
+			data[0] = r; data[1] = g; data[2] = b;
+		}
+		const double& R() const { return data[0]; }
+		const double& G() const { return data[1]; }
+		const double& B() const { return data[2]; }
+		double& R() { return data[0]; }
+		double& G() { return data[1]; }
+		double& B() { return data[2]; }
+	};
+private:
+	std::string name;
+	ColorComponent diffuse, specular, ambient;
+	double transparency;
+	double specularity;
+public:
+	SurfaceStyle(const std::string& name,
+				 double dr = 0.7,  double dg = 0.7, double db = 0.7,
+			 	 double sr = 0.2,  double sg = 0.2, double sb = 0.2, 
+			 	 double ar = 0.1,  double ag = 0.1, double ab = 0.1,
+				 double Ns = 10.0, double Tr = 1.0)
+		: name(name) 
+		, diffuse(dr, dg, db)
+		, specular(sr, sg, sb)
+		, ambient(ar, ag, ab)
+		, transparency(Tr)
+		, specularity(Ns)
+	{}
+	const std::string& Name() const { return name; }
+	const ColorComponent& Diffuse() const { return diffuse; }
+	const ColorComponent& Specular() const { return specular; }
+	const ColorComponent& Ambient() const { return ambient; }
+	double Transparency() const { return transparency; }
+	double Specularity() const { return specularity; }
+};
+
+SurfaceStyle GetDefaultMaterial(const std::string& s);
+
+#endif

src/ifcconvert/WavefrontObjSerializer.cpp

@@ -0,0 +1,116 @@
+/********************************************************************************
+ *                                                                              *
+ * This file is part of IfcOpenShell.                                           *
+ *                                                                              *
+ * IfcOpenShell is free software: you can redistribute it and/or modify         *
+ * it under the terms of the Lesser GNU General Public License as published by  *
+ * the Free Software Foundation, either version 3.0 of the License, or          *
+ * (at your option) any later version.                                          *
+ *                                                                              *
+ * IfcOpenShell is distributed in the hope that it will be useful,              *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of               *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                 *
+ * Lesser GNU General Public License for more details.                          *
+ *                                                                              *
+ * You should have received a copy of the Lesser GNU General Public License     *
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.         *
+ *                                                                              *
+ ********************************************************************************/
+
+#include "../ifcgeom/IfcGeomRenderStyles.h"
+
+#include "WavefrontObjSerializer.h"
+
+#include <iomanip>
+
+bool WaveFrontOBJSerializer::ready() {
+	return obj_stream.is_open() && mtl_stream.is_open();
+}
+
+void WaveFrontOBJSerializer::writeHeader() {
+	obj_stream << "# File generated by IfcOpenShell " << IFCOPENSHELL_VERSION << "\n";
+#ifdef WIN32
+	const char dir_separator = '\\';
+#else
+	const char dir_separator = '/';
+#endif
+	std::string mtl_basename = mtl_filename;
+	std::string::size_type slash = mtl_basename.find_last_of(dir_separator);
+	if (slash != std::string::npos) {
+		mtl_basename = mtl_basename.substr(slash+1);
+	}
+	obj_stream << "mtllib " << mtl_basename << "\n";
+	mtl_stream << "# File generated by IfcOpenShell " << IFCOPENSHELL_VERSION << "\n";	
+}
+
+void WaveFrontOBJSerializer::writeMaterial(const IfcGeom::Material& style) {			
+	mtl_stream << "newmtl " << style.name() << "\n";
+	if (style.hasDiffuse()) {
+		const double* diffuse = style.diffuse();
+		mtl_stream << "Kd " << diffuse[0] << " " << diffuse[1] << " " << diffuse[2] << "\n";
+	}
+	if (style.hasSpecular()) {
+		const double* specular = style.specular();
+		mtl_stream << "Ks " << specular[0] << " " << specular[1] << " " << specular[2] << "\n";
+	}
+	if (style.hasSpecularity()) {
+		mtl_stream << "Ns " << style.specularity() << "\n";
+	}
+	if (style.hasTransparency()) {
+		const double transparency = 1.0 - style.transparency();
+		if (transparency < 1) {
+			mtl_stream << "Tr " << transparency << "\n";
+			mtl_stream << "d "  << transparency << "\n";
+			mtl_stream << "D "  << transparency << "\n";
+		}
+	}
+}
+void WaveFrontOBJSerializer::write(const IfcGeom::TriangulationElement<double>* o) {
+
+	std::string tmp = o->name().empty() ? o->guid() : o->name();
+
+	std::replace( tmp.begin(), tmp.end(), ' ', '_');
+	const std::string name = tmp;
+	obj_stream << "g " << name << "\n";
+	obj_stream << "s 1" << "\n";
+
+	const IfcGeom::Representation::Triangulation<double>& mesh = o->geometry();
+	
+	const int vcount = mesh.verts().size() / 3;
+	for ( std::vector<double>::const_iterator it = mesh.verts().begin(); it != mesh.verts().end(); ) {
+		const double x = *(it++);
+		const double y = *(it++);
+		const double z = *(it++);
+		obj_stream << "v " << x << " " << y << " " << z << "\n";
+	}
+	for ( std::vector<double>::const_iterator it = mesh.normals().begin(); it != mesh.normals().end(); ) {
+		const double x = *(it++);
+		const double y = *(it++);
+		const double z = *(it++);
+		obj_stream << "vn " << x << " " << y << " " << z << "\n";
+	}
+
+	int previous_material_id = -2;
+	std::vector<int>::const_iterator material_it = mesh.material_ids().begin();
+
+	for ( std::vector<int>::const_iterator it = mesh.faces().begin(); it != mesh.faces().end(); ) {
+		
+		const int material_id = *(material_it++);
+		if (material_id != previous_material_id) {
+			const IfcGeom::Material& material = mesh.materials()[material_id];
+			const std::string material_name = material.name();
+			obj_stream << "usemtl " << material_name << "\n";
+			if (materials.find(material_name) == materials.end()) {
+				writeMaterial(material);
+				materials.insert(material_name);
+			}
+			previous_material_id = material_id;
+		}
+
+		const int v1 = *(it++)+vcount_total;
+		const int v2 = *(it++)+vcount_total;
+		const int v3 = *(it++)+vcount_total;
+		obj_stream << "f " << v1 << "//" << v1 << " " << v2 << "//" << v2 << " " << v3 << "//" << v3 << "\n";
+	}
+    vcount_total += vcount;
+}

src/ifcconvert/WavefrontObjSerializer.h

@@ -0,0 +1,56 @@
+/********************************************************************************
+ *                                                                              *
+ * This file is part of IfcOpenShell.                                           *
+ *                                                                              *
+ * IfcOpenShell is free software: you can redistribute it and/or modify         *
+ * it under the terms of the Lesser GNU General Public License as published by  *
+ * the Free Software Foundation, either version 3.0 of the License, or          *
+ * (at your option) any later version.                                          *
+ *                                                                              *
+ * IfcOpenShell is distributed in the hope that it will be useful,              *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of               *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                 *
+ * Lesser GNU General Public License for more details.                          *
+ *                                                                              *
+ * You should have received a copy of the Lesser GNU General Public License     *
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.         *
+ *                                                                              *
+ ********************************************************************************/
+
+#ifndef WAVEFRONTOBJSERIALIZER_H
+#define WAVEFRONTOBJSERIALIZER_H
+
+#include <set>
+#include <string>
+#include <fstream>
+
+#include "../ifcconvert/GeometrySerializer.h"
+
+class WaveFrontOBJSerializer : public GeometrySerializer {
+private:
+	const std::string mtl_filename;
+	std::ofstream obj_stream;
+	std::ofstream mtl_stream;
+	unsigned int vcount_total;
+	std::set<std::string> materials;
+public:
+	WaveFrontOBJSerializer(const std::string& obj_filename, const std::string& mtl_filename)
+		: GeometrySerializer()
+		, obj_stream(obj_filename.c_str())
+		, mtl_filename(mtl_filename)
+		, mtl_stream(mtl_filename.c_str())		
+		, vcount_total(1)
+	{}
+	virtual ~WaveFrontOBJSerializer() {}
+	bool ready();
+	void writeHeader();
+	void writeMaterial(const IfcGeom::Material& style);
+	void write(const IfcGeom::TriangulationElement<double>* o);
+	void write(const IfcGeom::BRepElement<double>* o) {}
+	void finalize() {}
+	bool isTesselated() const { return true; }
+	void setUnitNameAndMagnitude(const std::string& name, float magnitude) {}
+	void setFile(IfcParse::IfcFile*) {}
+};
+
+#endif

src/ifcconvert/XmlSerializer.cpp

@@ -0,0 +1,262 @@
+#include <map>
+
+#include <boost/property_tree/ptree.hpp>
+#include <boost/property_tree/xml_parser.hpp>
+#include <boost/foreach.hpp>
+#include <boost/version.hpp>
+
+#include "XmlSerializer.h"
+
+using boost::property_tree::ptree;
+using namespace IfcSchema;
+
+static std::map<std::string, std::string> argument_name_map;
+
+// Format an IFC attribute and maybe returns as string. Only literal scalar 
+// values are converted. Things like entity instances and lists are omitted.
+boost::optional<std::string> format_attribute(const Argument* argument, IfcUtil::ArgumentType argument_type) {
+	boost::optional<std::string> value;
+	switch(argument_type) {
+		case IfcUtil::Argument_BOOL: {
+			const bool b = *argument;
+			value = b ? "true" : "false";
+			break; }
+		case IfcUtil::Argument_DOUBLE: {
+			const double d = *argument;
+			std::stringstream stream;
+			stream << d;
+			value = stream.str();
+			break; }
+		case IfcUtil::Argument_STRING:
+		case IfcUtil::Argument_ENUMERATION: {
+			value = static_cast<std::string>(*argument);
+			break; }
+		case IfcUtil::Argument_INT: {
+			const int v = *argument;
+			std::stringstream stream;
+			stream << v;
+			value = stream.str();
+			break; }
+		case IfcUtil::Argument_ENTITY: {
+			IfcUtil::IfcBaseClass* e = *argument;
+			if (Type::IsSimple(e->type())) {
+				IfcUtil::IfcBaseType* f = (IfcUtil::IfcBaseType*) e;
+				value = format_attribute(f->getArgument(0), f->getArgumentType(0));
+			} else if (e->is(IfcSchema::Type::IfcSIUnit) || e->is(IfcSchema::Type::IfcConversionBasedUnit)) {
+				// Some string concatenation to have a unit name as a XML attribute.
+
+				std::string unit_name;
+
+				if (e->is(IfcSchema::Type::IfcSIUnit)) {
+					IfcSchema::IfcSIUnit* unit = (IfcSchema::IfcSIUnit*) e;
+					unit_name = IfcSchema::IfcSIUnitName::ToString(unit->Name());
+					if (unit->Prefix()) {
+						unit_name = IfcSchema::IfcSIPrefix::ToString(*unit->Prefix()) + unit_name;
+					}
+				} else {
+					IfcSchema::IfcConversionBasedUnit* unit = (IfcSchema::IfcConversionBasedUnit*) e;
+					unit_name = unit->Name();
+				}
+
+				for (std::string::iterator c = unit_name.begin(); c != unit_name.end(); ++c) *c = tolower(*c);
+
+				value = unit_name;
+			}
+			break; }
+	}
+	return value;
+}
+
+// Formats an entity instances as a ptree node, and insert into the DOM. Recurses
+// over the entity attributes and writes them as xml attributes of the node.
+ptree& format_entity_instance(IfcUtil::IfcBaseEntity* instance, ptree& tree, bool as_link = false) {
+	ptree child;
+	const unsigned n = instance->getArgumentCount();
+	for (unsigned i = 0; i < n; ++i) {
+		const Argument* argument = instance->getArgument(i);
+		if (argument->isNull()) continue;
+
+		std::string argument_name = instance->getArgumentName(i);
+		std::map<std::string, std::string>::const_iterator argument_name_it;
+		argument_name_it = argument_name_map.find(argument_name);
+		if (argument_name_it != argument_name_map.end()) {
+			argument_name = argument_name_it->second;
+		}
+		const IfcUtil::ArgumentType argument_type = instance->getArgumentType(i);
+
+		boost::optional<std::string> value;
+		try {
+			value = format_attribute(argument, argument_type);
+		} catch (...) {}
+
+		if (value) {
+			if (as_link) {
+				if (argument_name == "id") {
+					child.put("<xmlattr>.xlink:href", std::string("#") + *value);
+				}
+			} else {
+				std::stringstream stream;
+				stream << "<xmlattr>." << argument_name;
+				child.put(stream.str(), *value);
+			}
+		}
+	}
+	return tree.add_child(Type::ToString(instance->type()), child);
+}
+
+// A function to be called recursively. Template specialization is used 
+// to descend into decomposition, containment and property relationships.
+template <typename A>
+void descend(A* instance, ptree& tree) {
+	format_entity_instance(instance, tree);
+}
+
+// Returns related entity instances using IFC's objectified relationship
+// model. The second and third argument require a member function pointer.
+template <typename T, typename U, typename V, typename F, typename G>
+typename V::list::ptr get_related(T* t, F f, G g) {
+	typename U::list::ptr li = (*t.*f)()->template as<U>();
+	typename V::list::ptr acc(new typename V::list);
+	for (typename U::list::it it = li->begin(); it != li->end(); ++it) {
+		U* u = *it;
+		acc->push((*u.*g)());
+	}
+	return acc;
+}
+
+// Member functions for IFC attributes have identical names for getters and setters. Hence a full member function signature is needed to identify them.
+typedef IfcTemplatedEntityList<IfcProduct>::ptr (IfcRelContainedInSpatialStructure::*get_related_elements) (void) const;
+typedef IfcTemplatedEntityList<IfcObjectDefinition>::ptr (IfcRelDecomposes::*get_related_objects) (void) const;
+typedef IfcPropertySetDefinition* (IfcRelDefinesByProperties::*get_related_properties) (void) const;
+
+// Descends into the tree by recursing into IfcRelContainedInSpatialStructure,
+// IfcRelDecomposes and IfcRelDefinesByProperties relations.
+template <>
+void descend(IfcProduct* product, ptree& tree) {
+	ptree& child = format_entity_instance(product, tree);
+	
+	if (product->is(Type::IfcSpatialStructureElement)) {
+		IfcSpatialStructureElement* structure = (IfcSpatialStructureElement*) product;
+
+		IfcProduct::list::ptr elements = get_related
+			<IfcSpatialStructureElement, IfcRelContainedInSpatialStructure, IfcProduct>
+			(structure, &IfcSpatialStructureElement::ContainsElements, static_cast<get_related_elements>(&IfcRelContainedInSpatialStructure::RelatedElements));
+	
+		for (IfcProduct::list::it it = elements->begin(); it != elements->end(); ++it) {
+			descend(*it, child);
+		}
+	}
+
+	IfcObjectDefinition::list::ptr structures = get_related
+		<IfcProduct, IfcRelDecomposes, IfcObjectDefinition>
+		(product, &IfcProduct::IsDecomposedBy, static_cast<get_related_objects>(&IfcRelDecomposes::RelatedObjects));
+
+	for (IfcObjectDefinition::list::it it = structures->begin(); it != structures->end(); ++it) {
+		IfcObjectDefinition* ob = *it;
+		if (ob->is(Type::IfcSpatialStructureElement)) {
+			descend((IfcProduct*)ob, child);
+		} else {
+			descend(ob, child);
+		}
+	}
+
+	IfcPropertySetDefinition::list::ptr property_sets = get_related
+		<IfcProduct, IfcRelDefinesByProperties, IfcPropertySetDefinition>
+		(product, &IfcProduct::IsDefinedBy, static_cast<get_related_properties>(&IfcRelDefinesByProperties::RelatingPropertyDefinition));
+
+	for (IfcPropertySetDefinition::list::it it = property_sets->begin(); it != property_sets->end(); ++it) {
+		IfcPropertySetDefinition* pset = *it;
+		if (pset->is(Type::IfcPropertySet)) {
+			format_entity_instance(pset, child, true);
+		}
+	}
+}
+
+// Descends into the tree by recursing into IfcRelDecomposes relations.
+template <>
+void descend(IfcProject* project, ptree& tree) {
+	ptree& child = format_entity_instance(project, tree);
+	
+	IfcObjectDefinition::list::ptr structures = get_related
+		<IfcProject, IfcRelDecomposes, IfcObjectDefinition>
+		(project, &IfcProject::IsDecomposedBy, static_cast<get_related_objects>(&IfcRelDecomposes::RelatedObjects));
+	
+	for (IfcObjectDefinition::list::it it = structures->begin(); it != structures->end(); ++it) {
+		IfcObjectDefinition* ob = *it;
+		if (ob->is(Type::IfcSpatialStructureElement)) {
+			descend((IfcProduct*)ob, child);
+		} else {
+			descend(ob, child);
+		}
+	}
+}
+
+// Format IfcProperty instances and insert into the DOM. IfcComplexProperties are flattened out.
+void format_properties(IfcProperty::list::ptr properties, ptree& node) {
+	for (IfcProperty::list::it it = properties->begin(); it != properties->end(); ++it) {
+		IfcProperty* p = *it;
+		if (p->is(Type::IfcComplexProperty)) {
+			IfcComplexProperty* complex = (IfcComplexProperty*) p;
+			format_properties(complex->HasProperties(), node);
+		} else {
+			format_entity_instance(p, node);
+		}
+	}
+}
+
+void XmlSerializer::finalize() {
+	argument_name_map.insert(std::make_pair("GlobalId", "id"));
+
+	IfcProject::list::ptr projects = file->entitiesByType<IfcProject>();
+	if (projects->size() != 1) {
+		Logger::Message(Logger::LOG_ERROR, "Expected a single IfcProject");
+		return;
+	}
+	IfcProject* project = *projects->begin();
+
+	ptree root, header, decomposition, properties;
+	
+	// Write the SPF header as XML nodes.
+	BOOST_FOREACH(const std::string& s, file->header().file_description().description()) {
+		header.add_child("file_description.description", ptree(s));
+	}
+	BOOST_FOREACH(const std::string& s, file->header().file_name().author()) {
+		header.add_child("file_name.author", ptree(s));
+	}
+	BOOST_FOREACH(const std::string& s, file->header().file_name().organization()) {
+		header.add_child("file_name.organization", ptree(s));
+	}
+	BOOST_FOREACH(const std::string& s, file->header().file_schema().schema_identifiers()) {
+		header.add_child("file_schema.schema_identifiers", ptree(s));
+	}
+	header.put("file_description.implementation_level", file->header().file_description().implementation_level());
+	header.put("file_name.name",                        file->header().file_name().name());
+	header.put("file_name.time_stamp",                  file->header().file_name().time_stamp());
+	header.put("file_name.preprocessor_version",        file->header().file_name().preprocessor_version());
+	header.put("file_name.originating_system",          file->header().file_name().originating_system());
+	header.put("file_name.authorization",               file->header().file_name().authorization());
+	
+	// Descend into the decomposition structure of the IFC file.
+	descend(project, decomposition);
+
+	// Write all property sets and values as XML nodes.
+	IfcPropertySet::list::ptr psets = file->entitiesByType<IfcPropertySet>();
+	for (IfcPropertySet::list::it it = psets->begin(); it != psets->end(); ++it) {
+		IfcPropertySet* pset = *it;
+		ptree& node = format_entity_instance(pset, properties);
+		format_properties(pset->HasProperties(), node);
+	}
+
+	root.add_child("ifc.header",        header);
+	root.add_child("ifc.properties",    properties);
+	root.add_child("ifc.decomposition", decomposition);
+
+	root.put("ifc.<xmlattr>.xmlns:xlink", "http://www.w3.org/1999/xlink");
+
+#if BOOST_VERSION >= 105600
+	boost::property_tree::xml_writer_settings<ptree::key_type> settings = boost::property_tree::xml_writer_make_settings<ptree::key_type>('\t', 1);
+#else
+	boost::property_tree::xml_writer_settings<char> settings('\t', 1);
+#endif
+	boost::property_tree::write_xml(xml_filename, root, std::locale(), settings);
+}

src/ifcconvert/XmlSerializer.h

@@ -0,0 +1,41 @@
+/********************************************************************************
+ *                                                                              *
+ * This file is part of IfcOpenShell.                                           *
+ *                                                                              *
+ * IfcOpenShell is free software: you can redistribute it and/or modify         *
+ * it under the terms of the Lesser GNU General Public License as published by  *
+ * the Free Software Foundation, either version 3.0 of the License, or          *
+ * (at your option) any later version.                                          *
+ *                                                                              *
+ * IfcOpenShell is distributed in the hope that it will be useful,              *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of               *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                 *
+ * Lesser GNU General Public License for more details.                          *
+ *                                                                              *
+ * You should have received a copy of the Lesser GNU General Public License     *
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.         *
+ *                                                                              *
+ ********************************************************************************/
+
+#ifndef XMLSERIALIZER_H
+#define XMLSERIALIZER_H
+
+#include "../ifcconvert/Serializer.h"
+
+class XmlSerializer : public Serializer {
+private:
+	IfcParse::IfcFile* file;
+	std::string xml_filename;
+public:
+	XmlSerializer(const std::string& xml_filename)
+		: Serializer()
+		, xml_filename(xml_filename)
+	{}
+
+	bool ready() { return true; }
+	void writeHeader() {}
+	void finalize();
+	void setFile(IfcParse::IfcFile* f) { file = f; }
+};
+
+#endif

src/ifcexpressparser/IfcExpressParser.py

@@ -1,557 +0,0 @@
-header = """
-/********************************************************************************
- *                                                                              *
- * This file is part of IfcOpenShell.                                           *
- *                                                                              *
- * IfcOpenShell is free software: you can redistribute it and/or modify         *
- * it under the terms of the Lesser GNU General Public License as published by  *
- * the Free Software Foundation, either version 3.0 of the License, or          *
- * (at your option) any later version.                                          *
- *                                                                              *
- * IfcOpenShell is distributed in the hope that it will be useful,              *
- * but WITHOUT ANY WARRANTY; without even the implied warranty of               *
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                 *
- * Lesser GNU General Public License for more details.                          *
- *                                                                              *
- * You should have received a copy of the Lesser GNU General Public License     *
- * along with this program. If not, see <http://www.gnu.org/licenses/>.         *
- *                                                                              *
- ********************************************************************************/
- """.strip()
-
-###############################################################################
-#                                                                             #
-# This file can be used to generate C++ code from Express schema files. The   #
-# generated code works alongside the IfcOpenShell IfcParse library. This      #
-# script has only been tested on IFC2X3_TC1.exp and will most probably not    #
-# work on any other schemas.                                                  #
-#                                                                             #
-# Note this script uses funcparserlib, which is available at:                 #
-# http://code.google.com/p/funcparserlib/                                     #
-# The script only works with revision 30f7ee896bc9 because it uses the some() #
-# parser and is incompatible with other changes as well.                      #
-#                                                                             #
-###############################################################################
-
-import os, sys
-import IfcDocumentation
-
-filename = sys.argv[1]
-
-#
-# A class to split the Express schema files into seperate tokens
-#
-class Tokenizer(object):
-    comment = ['(*','*)']
-    termchars = ',;()=[]:'
-    def __init__(self, fn):
-        if hasattr(fn,'read'): object.__setattr__(self,'f',fn)
-        else: object.__setattr__(self,'f',open(fn,'rb'))
-    def __getattr__(self, name):
-        return getattr(self.f, name)
-    def __setattr__(self, name, value):
-        setattr(self.f, name, value)
-    def __iter__(self): return self
-    def next(self):
-        def get():
-            buffer = ''
-            in_comment = False
-            in_string = False
-            offset = self.tell()
-            while True:
-                c = self.read(2)
-                if len(c) < 2: raise StopIteration
-                if c in Tokenizer.comment:
-                    in_comment = c == Tokenizer.comment[0]
-                    continue
-                if in_string and c == "''":
-                    buffer += "'"
-                    continue
-                self.seek(-1,1)
-                if not in_string and c[0].isspace():
-                    if ( len(buffer) ): return buffer
-                    else:
-                        offset = self.tell()
-                        continue
-                if not in_comment:
-                    if len(buffer) and (c[0] in Tokenizer.termchars or buffer[-1] in Tokenizer.termchars):
-                        self.seek(-1,1)
-                        return buffer
-                    buffer += c[0]
-        return get()
-
-#
-# Some global variables to keep track of variable names
-#
-express_to_cpp = {
-    'BOOLEAN':'bool',
-    'LOGICAL':'bool',
-    'INTEGER':'int',
-    'REAL':'double',
-    'NUMBER':'double',
-    'STRING':'std::string'
-}
-schema_version = ''
-enumerations = set()
-selections = set()
-entity_names = set()
-simple_types = {}
-selectable_simple_types = set()
-argument_count = {}
-parent_relations = {}
-
-#
-# Since inherited arguments of Express entities are placed in sequence before the non-inherited once, we need to keep track of how many inherited arguments exist
-#
-def argument_start(c):
-    if c not in parent_relations: return 0
-    i = 0
-    while True:
-        c = parent_relations[c]
-        i += argument_count[c] if c in argument_count else 0
-        if not (c in parent_relations): break
-    return i
-
-#
-# Several classes to generate code from Express types and entities
-#
-class ArrayType:
-    def __init__(self,l): 
-        self.type = express_to_cpp.get(l[3],l[3])
-        self.upper = l[2]
-        self.lower = l[1]
-    def __str__(self):
-        if self.type in entity_names:
-            return "SHARED_PTR< IfcTemplatedEntityList<%s> >"%self.type
-        elif self.type in selections:
-            return "SHARED_PTR< IfcTemplatedEntityList<IfcAbstractSelect> >"
-        else:
-            return "std::vector<%(type)s> /*[%(lower)s:%(upper)s]*/"%self.__dict__
-    def type_enum(self):
-        if self.type in simple_types:
-            t = simple_types[self.type].type_enum()
-        else:
-            t = self.type
-        if t in entity_names or t == "Argument_ENTITY":
-            return "Argument_ENTITY_LIST"
-        elif t in selections:
-            return "Argument_ENTITY_LIST"
-        elif t == "int":
-            return "Argument_VECTOR_INT"
-        elif t == "double" or t == "Argument_DOUBLE":
-            return "Argument_VECTOR_DOUBLE"
-        elif t == "std::string" or t == "Argument_STRING":
-            return "Argument_VECTOR_STRING"
-        elif isinstance(t, BinaryType):
-            return "Argument_UNKNOWN"
-        else:
-            assert False, t
-        
-class ScalarType:
-    def __init__(self,l): self.type = express_to_cpp.get(l,l)
-    def __str__(self): return self.type
-    def type_enum(self):
-        if self.type in simple_types:
-            return simple_types[self.type].type_enum()
-        elif self.type in entity_names:
-            return "Argument_ENTITY"
-        else:
-            return { "bool":"Argument_BOOL","int":"Argument_INT","double":"Argument_DOUBLE","std::string":"Argument_STRING"}[self.type]
-class EnumType:
-    def __init__(self,l):
-        self.v = [(x,'%s_%s'%('%(fancy_name)s',x)) for x in l]
-        self.maxlen = max([len(v) for v in self.v])
-    def __str__(self): 
-        if generator_mode == 'HEADER':
-            return "enum {%s}"%", ".join([v2 for v1,v2 in self.v])
-        elif generator_mode == 'SOURCE_TO':
-            return '{ "%s" }'%'","'.join([v1 for v1,v2 in self.v])
-        elif generator_mode == 'SOURCE_FROM':
-            return "".join(['    if(s=="%s"%s) return %s::%s;\n'%(v1.upper()," "*(self.maxlen-len(v1)),"%(name)s",v2) for v1,v2 in self.v])            
-    def __len__(self): return len(self.v)
-    def type_enum(self):
-        return "Argument_ENUMERATION"
-class SelectType:
-    def __init__(self,l): 
-        for x in l: 
-            if x in simple_types: selectable_simple_types.add(x)
-    def __str__(self): return "IfcSchemaEntity"
-    def type_enum(self): return "Argument_ENTITY"
-class BinaryType:
-    def __init__(self,l): self.l = int(l)
-    def __str__(self): return "char[%s]"%self.l
-    def type_enum(self): raise NotImplementedError()
-class InverseType:
-    def __init__(self,l):
-        self.name, self.type, self.reference = l
-    def type_enum(self): return "Argument_ENTITY" 
-class Typedef:
-    def __init__(self,l):
-        self.name,self.type=l[1:3]
-        self.fancy_name = self.name[:-4] if self.name.endswith("Enum") else self.name
-        if isinstance(self.type,EnumType): 
-            enumerations.add(self.name)
-            self.len = len(self.type)
-        elif isinstance(self.type,SelectType): selections.add(self.name)
-        simple_types[self.name] = self
-        comment = IfcDocumentation.description(self.name)
-        self.comment = comment+"\n" if comment else ''
-    def __str__(self):
-        global generator_mode
-        if generator_mode == 'HEADER' and isinstance(self.type,EnumType):
-            return ("namespace %(name)s {\n%(comment)stypedef %(type)s %(name)s;\nstd::string ToString(%(name)s v);\n%(name)s FromString(const std::string& s);\n}"%self.__dict__)%self.__dict__
-        elif generator_mode == 'HEADER':
-            return "%stypedef %s %s;"%(self.comment,self.type,self.name)
-        elif generator_mode == 'SOURCE' and isinstance(self.type,EnumType):
-            generator_mode = 'SOURCE_TO'
-            s =  "std::string %(name)s::ToString(%(name)s v) {\n    if ( v < 0 || v >= %(len)d ) throw IfcException(\"Unable to find find keyword in schema\");\n    const char* names[] = %(type)s;\n    return names[v];\n}\n"%self.__dict__
-            generator_mode = 'SOURCE_FROM'
-            s += ("%(name)s::%(name)s %(name)s::FromString(const std::string& s) {\n%(type)s    throw IfcException(\"Unable to find find keyword in schema\");\n}"%self.__dict__)%self.__dict__
-            generator_mode = 'SOURCE'
-            return s
-    def type_enum(self):
-        return self.type.type_enum()
-class Argument(object):
-    def __init__(self,l):
-        self.name, self.optional, self.type = l
-class ArgumentList:
-    def __init__(self,l):
-        self.l = [Argument(a) for a in l]
-        self.argstart = 0
-    def __len__(self): return len(self.l)
-    def __str__(self):
-        s = ""
-        argv = self.argstart
-        for a in self.l:
-            class_name = indent = comment = optional_comment = ""
-            return_type = str(a.type)
-            if generator_mode == 'SOURCE':
-                class_name = "%(class_name)s::"
-                if isinstance(a.type,BinaryType) or (isinstance(a.type,ArrayType) and isinstance(a.type.type,BinaryType)):
-                    function_body = " { throw; /* Not implemented argument 7 */ }"
-                elif isinstance(a.type,ArrayType) and str(a.type.type) in entity_names:
-                    function_body = " { RETURN_AS_LIST(%s,%d) }"%(a.type.type,argv)
-                elif isinstance(a.type,ArrayType) and str(a.type.type) in selections:
-                    function_body = " { RETURN_AS_LIST(IfcAbstractSelect,%d) }"%(argv)
-                elif return_type in entity_names:
-                    function_body = " { return reinterpret_pointer_cast<IfcBaseClass,%s>(*entity->getArgument(%d)); }"%(return_type,argv)
-                elif return_type in enumerations:
-                    function_body = " { return %s::FromString(*entity->getArgument(%d)); }"%(return_type,argv)
-                else:
-                    function_body = " { return *entity->getArgument(%d); }"%argv
-                function_body2 = " { return !entity->getArgument(%d)->isNull(); }"%argv
-            else:
-                indent = "    "
-                function_body = function_body2 = ";"
-                comment = IfcDocumentation.description((self.class_name,a.name))
-                comment = comment+"\n" if comment else ''
-                comment = comment.replace("///","%s///"%indent)
-                optional_comment = "%s/// Whether the optional attribute %s is defined for this %s\n"%(indent,a.name,self.class_name)
-            if a.optional: s += "\n%s%sbool %shas%s()%s"%(optional_comment,indent,class_name,a.name,function_body2)
-            if ( str(a.type) in enumerations ):
-                return_type = "%(type)s::%(type)s"%a.__dict__
-            elif ( str(a.type) in entity_names ):
-                return_type = "%(type)s*"%a.__dict__
-            s += "\n%s%s%s %s%s()%s"%(comment,indent,return_type,class_name,a.name,function_body)
-            argv += 1
-
-        if generator_mode == 'HEADER':
-            s += "\n virtual unsigned int getArgumentCount() const { return %(n_arguments)d; }" % dict(class_name=self.class_name, n_arguments=len(self.l) + argument_start(self.class_name))
-
-            s += "\n virtual ArgumentType getArgumentType(unsigned int i) const {"
-            if len(self.l):
-                s += " switch (i) {"
-                for i, a in enumerate(self.l):
-                    s += "case %d: " % (i + argument_start(self.class_name))
-                    s += "return %s; " % a.type.type_enum()
-                s += "}"
-            if self.parent_class is not None:
-                s += " return %s::getArgumentType(i); }" % self.parent_class
-            else:
-                s += " throw IfcException(\"argument out of range\"); }"
-
-            s += "\n virtual const char* getArgumentName(unsigned int i) const {"
-            if len(self.l):
-                s += " switch (i) {"
-                for i, a in enumerate(self.l):
-                    s += "case %d: " % (i + argument_start(self.class_name))
-                    s += "return \"%s\"; " % a.name
-                s += "}"
-            if self.parent_class is not None:
-                s += " return %s::getArgumentName(i); }" % self.parent_class
-            else:
-                s += " throw IfcException(\"argument out of range\"); }"
-
-            s += "\n virtual ArgumentPtr getArgument(unsigned int i) const { return entity->getArgument(i); }"
-        return s
-class InverseList:
-    def __init__(self,l):
-        self.l = l
-    def __str__(self):
-        if self.l is None: return ""
-        s = ""
-        for i in self.l:
-            if generator_mode == 'HEADER':
-                s += "\n    SHARED_PTR< IfcTemplatedEntityList<%s> > %s(); // INVERSE %s::%s"%(i.type.type,i.name,i.type.type,i.reference)
-            elif generator_mode == 'SOURCE':
-                s += "\n%s::list %s::%s() { RETURN_INVERSE(%s) }"%(i.type.type,"%(class_name)s",i.name,i.type.type)
-        return s
-class Classdef:
-    def __init__(self,l):
-        self.class_name, self.parent_class, self.arguments, self.inverse = l
-        self.arguments.class_name = self.class_name
-        self.arguments.parent_class = self.parent_class
-        entity_names.add(self.class_name)
-        parent_relations[self.class_name] = self.parent_class
-        argument_count[self.class_name] = len(self.arguments)
-    def __str__(self):
-        if generator_mode == 'HEADER':
-            comment = IfcDocumentation.description(self.class_name)
-            comment = comment+"\n" if comment else ''
-            return "%sclass %s : public %s {\npublic:%s%s%s\n};" % (comment,self.class_name,
-                "IfcBaseEntity" if self.parent_class is None else self.parent_class,
-                self.arguments,
-                self.inverse,
-                ("\n    bool is(Type::Enum v) const;"+
-                "\n    Type::Enum type() const;"+
-                "\n    static Type::Enum Class();"+
-                "\n    %(class_name)s (IfcAbstractEntityPtr e = IfcAbstractEntityPtr());"+
-                "\n    typedef %(class_name)s* ptr;"+
-                "\n    typedef SHARED_PTR< IfcTemplatedEntityList<%(class_name)s> > list;"+
-                "\n    typedef IfcTemplatedEntityList<%(class_name)s>::it it;")%self.__dict__
-            )
-        elif generator_mode == 'SOURCE':
-            self.arguments.argstart = argument_start(self.class_name)
-            return (("\n// Function implementations for %(class_name)s"+str(self.arguments)+str(self.inverse)+
-            ("\nbool %(class_name)s::is(Type::Enum v) const { return v == Type::%(class_name)s; }" if self.parent_class is None else
-            "\nbool %(class_name)s::is(Type::Enum v) const { return v == Type::%(class_name)s || %(parent_class)s::is(v); }")+
-            "\nType::Enum %(class_name)s::type() const { return Type::%(class_name)s; }"+
-            "\nType::Enum %(class_name)s::Class() { return Type::%(class_name)s; }"+
-            "\n%(class_name)s::%(class_name)s(IfcAbstractEntityPtr e) { if (!is(Type::%(class_name)s)) throw IfcException(\"Unable to find find keyword in schema\"); entity = e; }")%self.__dict__)%self.__dict__
-
-
-from funcparserlib.parser import a, skip, many, maybe, some
-
-#
-# Lambda functions to map combinator output to classes
-# 
-array_type = lambda t: ArrayType(t)
-scalar_type = lambda t: ScalarType(t)
-enum_type = lambda t: EnumType(t)
-select_type = lambda t: SelectType(t)
-binary_type = lambda t: BinaryType(t)
-inverse_type = lambda t: InverseType(t)
-format_type = lambda t: Typedef(t)
-argument_list = lambda t: ArgumentList(t)
-inverse_list = lambda t: InverseList(t)
-format_options = lambda t: [t[0]]+t[1]
-
-#
-# The actual grammar definition
-#
-s = some(lambda t: not t in ['UNIQUE','WHERE','END_ENTITY','END_TYPE','INVERSE','DERIVE'])
-x = lambda s:skip(a(s))
-list_or_array = a('ARRAY') | a('LIST') | a('SET')
-binary = x('BINARY')+x('(') + s + x(')') >> binary_type
-array = list_or_array + x('[') + s + x(':') + s + x(']') + x('OF') + skip(maybe(a('UNIQUE'))) + (binary|s) >> array_type
-options = x('(') + s + many(x(',')+s) + x(')') >> format_options
-enum = x('ENUMERATION') + x('OF') + options >> enum_type
-select = x('SELECT') + options >> select_type
-single = s + skip(maybe(x('(')+s+x(')')) + maybe(a('FIXED'))) >> scalar_type
-type_type = array | enum | select | single
-type_start = a('TYPE') + s + x('=') + type_type + x(';')
-type_end = a('END_TYPE') + x(';')
-
-to_end = many(some(lambda t: t != ';'))
-clause = s + x(':') + to_end + x(';')
-where = a('WHERE') + many(clause)
-
-type = type_start + maybe(where) + type_end >> format_type
-
-subtype = x('SUBTYPE') + x('OF') + x('(') + s + x(')')
-supertype = maybe(x('ABSTRACT')) + x('SUPERTYPE') + x('OF') + x('(') + x('ONEOF') + options + x(')')
-entity_start = x('ENTITY') + s + skip(maybe(supertype)) + maybe(subtype) + x(';')
-entity_end = x('END_ENTITY') + x(';')
-key_value = s + x(':') + maybe(a('OPTIONAL')) + (array|binary|single) + x(';')
-arguments = many(key_value) >> argument_list
-unique_value = s + x(':') + s + many(a(',')+s) + a(';')
-unique = skip(a('UNIQUE') + many(unique_value))
-inverse_def = s + x(':') + (array|single) + x('FOR') + s + x(';') >> inverse_type
-inverse = maybe(x('INVERSE') + many( inverse_def )) >> inverse_list
-derive = skip(a('DERIVE') + many(clause))
-
-entity = entity_start + arguments + skip(maybe(unique)) + skip(maybe(derive)) + inverse + skip(maybe(where)) + entity_end >> Classdef
-
-schema = skip(a('SCHEMA')) + s + x(';')
-
-express = schema + many(type) + many(entity)
-schema_version,types,entities = express.parse(list(Tokenizer(filename)))
-schema_version = schema_version.capitalize()
-
-#
-# Writing of the three generated files starts here
-#
-h_file = open("%s.h"%schema_version,'w')
-enumh_file = open("%senum.h"%schema_version,'w')
-cpp_file = open("%s.cpp"%schema_version,'w')
-
-header += """
-
-/********************************************************************************
- *                                                                              *
- * This file has been generated from %s. Do not make modifications  *
- * but instead modify the python script that has been used to generate this.    *
- *                                                                              *
- ********************************************************************************/
- """%filename
-
-generator_mode = 'HEADER'
- 
-print >>h_file, header
-print >>enumh_file, header
-print >>cpp_file, header
-print >>h_file, """#ifndef %(schema_upper)s_H
-#define %(schema_upper)s_H
-
-#include <string>
-#include <vector>
-#include <map>
-
-#include "../ifcparse/IfcUtil.h"
-#include "../ifcparse/IfcException.h"
-#include "../ifcparse/%(schema)senum.h"
-
-using namespace IfcUtil;
-using IfcParse::IfcException;
-
-#define RETURN_INVERSE(T) \\
-    IfcEntities e = entity->getInverse(T::Class()); \\
-    SHARED_PTR< IfcTemplatedEntityList<T> > l ( new IfcTemplatedEntityList<T>() ); \\
-    for ( IfcEntityList::it it = e->begin(); it != e->end(); ++ it ) { \\
-        l->push(reinterpret_pointer_cast<IfcBaseClass,T>(*it)); \\
-    } \\
-    return l;
-
-#define RETURN_AS_SINGLE(T,a) \\
-    return reinterpret_pointer_cast<IfcBaseClass,T>(*entity->getArgument(a));
-
-#define RETURN_AS_LIST(T,a)  \\
-    IfcEntities e = *entity->getArgument(a);  \\
-    SHARED_PTR< IfcTemplatedEntityList<T> > l ( new IfcTemplatedEntityList<T>() );  \\
-    for ( IfcEntityList::it it = e->begin(); it != e->end(); ++ it ) {  \\
-        l->push(reinterpret_pointer_cast<IfcBaseClass,T>(*it)); \\
-    }  \\
-    return l;
-
-namespace %(schema)s {
-"""%{'schema_upper':schema_version.upper(),'schema':schema_version}
-
-simple_enumerations = sorted(selectable_simple_types)
-entity_enumerations = sorted(entity_names)
-all_enumerations = simple_enumerations + entity_enumerations
-
-print >>enumh_file, """#ifndef IFC2X3ENUM_H
-#define IFC2X3ENUM_H
-
-namespace Ifc2x3 {
-
-namespace Type {
-    typedef enum {
-        %(enum)s
-    } Enum;
-    Enum Parent(Enum v);
-    Enum FromString(const std::string& s);
-    std::string ToString(Enum v);
-}
-
-}
-
-#endif
-"""%{'schema_upper':schema_version.upper(),'schema':schema_version,'enum':", ".join(all_enumerations + ["ALL"])}
-
-defined_types = set(express_to_cpp.values())
-deferred_types = []
-
-for t in [T for T in types if not (isinstance(T.type,EnumType) or isinstance(T.type,SelectType))]:
-    if isinstance(t.type,ScalarType) and str(t.type) not in defined_types:
-        deferred_types.append(t)
-    else:
-        print >>h_file, t
-for t in [T for T in types if isinstance(T.type,SelectType)]:
-    print >>h_file, t
-for t in deferred_types:
-    print >>h_file, t
-for t in [T for T in types if isinstance(T.type,EnumType)]:
-    print >>h_file, t
-    
-print >>h_file, "// Forward definitions"
-print >>h_file, "class %s;\n"%"; class ".join([e.class_name for e in entities])
-
-defined_classes = set()
-while True:
-    classes = [c for c in entities if c.class_name not in defined_classes]
-    if not len(classes): break
-    for c in classes:
-        if c.parent_class is None or c.parent_class in defined_classes:
-            defined_classes.add(c.class_name)
-            print >>h_file, c
-
-print >>h_file, "void InitStringMap();"
-print >>h_file, "IfcSchemaEntity SchemaEntity(IfcAbstractEntityPtr e = 0);"
-
-print >>h_file, "}\n\n#endif"
-
-generator_mode = 'SOURCE'
-
-print >>cpp_file, """#include "%(schema)s.h"
-#include "IfcException.h"
-
-using namespace %(schema)s;
-using namespace IfcParse;
-
-IfcSchemaEntity %(schema)s::SchemaEntity(IfcAbstractEntityPtr e) {
-    switch(e->type()){"""%{'schema':schema_version}
-
-for e in simple_enumerations:
-    print >>cpp_file, "        case Type::%s: return new IfcEntitySelect(e); break;"%e
-for e in entity_enumerations:
-    print >>cpp_file, "        case Type::%s: return new %s(e); break;"%(e,e)
-print >>cpp_file, "        default: throw IfcException(\"Unable to find find keyword in schema\"); break; "
-print >>cpp_file, "    }\n}"
-print >>cpp_file
-print >>cpp_file, "std::string Type::ToString(Enum v) {"
-print >>cpp_file, "    if (v < 0 || v >= %d) throw IfcException(\"Unable to find find keyword in schema\");"%len(all_enumerations)
-print >>cpp_file, '    const char* names[] = { "%s" };'%'","'.join(all_enumerations)
-print >>cpp_file, '    return names[v];'
-print >>cpp_file, "}"
-print >>cpp_file
-#print >>cpp_file, "Type::Enum Type::FromStringOld(const std::string& s){"
-#elseif = "if"
-#maxlen = max([len(e) for e in all_enumerations])
-#for e in all_enumerations:
-#    print >>cpp_file, '    %s(s=="%s"%s) { return %s; }'%(elseif,e.upper()," "*(maxlen-len(e)),e)
-#print >>cpp_file, "    throw;"
-#print >>cpp_file, "}"
-print >>cpp_file, "std::map<std::string,Type::Enum> string_map;"
-print >>cpp_file, "void Ifc2x3::InitStringMap() {"
-maxlen = max([len(e) for e in all_enumerations])
-for e in all_enumerations:
-    print >>cpp_file, '    string_map["%s"%s] = Type::%s;'%(e.upper()," "*(maxlen-len(e)),e)
-print >>cpp_file, """}
-Type::Enum Type::FromString(const std::string& s) {
-    std::map<std::string,Type::Enum>::const_iterator it = string_map.find(s);
-    if ( it == string_map.end() ) throw IfcException("Unable to find find keyword in schema");
-    else return it->second;
-}"""
-
-print >>cpp_file, "Type::Enum Type::Parent(Enum v){"
-print >>cpp_file, "    if (v < 0 || v >= %d) return (Enum)-1;"%len(all_enumerations)
-for e in entity_enumerations:
-    if e not in parent_relations or parent_relations[e] is None: continue
-    print >>cpp_file, '    if(v==%s%s) { return %s; }'%(e," "*(maxlen-len(e)),parent_relations[e])
-print >>cpp_file, "    return (Enum)-1;"
-print >>cpp_file, "}"
-
-for t in [T for T in types if isinstance(T.type,EnumType)]:
-    print >>cpp_file, t
-for e in entities: print >>cpp_file, e,

src/ifcexpressparser/README.txt

@@ -0,0 +1,9 @@
+This folder contains Python code to generate C++ type information based on an
+Express schema. In particular is has only been tested using recent version of
+the IFC schema and will most likely fail on any other Express schema.
+
+The code can be invoked in the following way and results in two header files
+and a single implementation file named according to the schema name in the 
+Express file. A python 3 interpreter with the pyparsing library is required.
+
+$ python bootstrap.py express.bnf > express_parser.py && python express_parser.py IFC2X3_TC1.exp

src/ifcexpressparser/bootstrap.py

@@ -0,0 +1,186 @@
+###############################################################################
+#                                                                             #
+# This file is part of IfcOpenShell.                                          #
+#                                                                             #
+# IfcOpenShell is free software: you can redistribute it and/or modify        #
+# it under the terms of the Lesser GNU General Public License as published by #
+# the Free Software Foundation, either version 3.0 of the License, or         #
+# (at your option) any later version.                                         #
+#                                                                             #
+# IfcOpenShell is distributed in the hope that it will be useful,             #
+# but WITHOUT ANY WARRANTY; without even the implied warranty of              #
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                #
+# Lesser GNU General Public License for more details.                         #
+#                                                                             #
+# You should have received a copy of the Lesser GNU General Public License    #
+# along with this program. If not, see <http://www.gnu.org/licenses/>.        #
+#                                                                             #
+###############################################################################
+
+import sys
+import string
+from pyparsing import *
+
+class Expression:
+    def __init__(self, contents):
+        self.contents = contents[0]
+    def __repr__(self):
+        if self.op is None: return repr(self.contents)
+        c = [isinstance(c,str) and c or str(c) for c in self.contents]
+        if "%s" in self.op: return self.op % (" ".join(c))
+        else: return "(%s)" % (" %s "%self.op).join(c)
+    def __iter__(self):
+        return self.contents.__iter__()
+
+class Union(Expression):
+    op = "|"
+
+class Concat(Expression):
+    op = "+"
+
+class Optional(Expression):
+    op = "Optional(%s)"
+
+class Repeated(Expression):
+    op = "ZeroOrMore(%s)"
+
+class Term(Expression):
+    op = None
+
+class Keyword:
+    def __init__(self, contents):
+        self.contents = contents[0]
+    def __repr__(self):
+        return self.contents
+
+class Terminal:
+    def __init__(self, contents):
+        self.contents = contents[0]
+    def __repr__(self):
+        s = self.contents
+        is_keyword = len(s) >= 4 and s[0::len(s)-1] == '""' and \
+            all(c in alphanums+"_" for c in s[1:-1])
+        ty = "CaselessKeyword" if is_keyword else "CaselessLiteral"
+        return "%s(%s)" % (ty, s)
+
+
+LPAREN = Suppress("(")
+RPAREN = Suppress(")")
+LBRACK = Suppress("[")
+RBRACK = Suppress("]")
+LBRACE = Suppress("{")
+RBRACE = Suppress("}")
+EQUALS = Suppress("=")
+VBAR   = Suppress("|")
+PERIOD = Suppress(".")
+HASH   = Suppress("#")
+
+identifier = Word(alphanums+"_")
+keyword    = Word(alphanums+"_").setParseAction(Keyword)
+expression = Forward()
+optional   = Group(LBRACK + expression + RBRACK).setParseAction(Optional)
+repeated   = Group(LBRACE + expression + RBRACE).setParseAction(Repeated)
+terminal   = quotedString.setParseAction(Terminal)
+term       = (keyword | terminal | optional | repeated | (LPAREN + expression + RPAREN)).setParseAction(Term)
+concat     = Group(term + OneOrMore(term)).setParseAction(Concat)
+factor     = concat | term
+union      = Group(factor + OneOrMore(VBAR + factor)).setParseAction(Union)
+rule       = identifier + EQUALS + expression + PERIOD
+
+expression << (union | factor)
+
+grammar = OneOrMore(Group(rule))
+grammar.ignore(HASH + restOfLine)
+
+express = grammar.parseFile(sys.argv[1])
+
+def find_keywords(expr, li = None):
+    if li is None: li = []
+    if isinstance(expr, Term):
+        expr = expr.contents
+    if isinstance(expr, Keyword):
+        li.append(repr(expr))
+        return li
+    elif isinstance(expr, Expression):
+        for term in expr:
+            find_keywords(term, li)
+    return set(li)
+
+actions = {
+    'type_decl'                 : "lambda t: TypeDeclaration(t)",
+    'entity_decl'               : "lambda t: EntityDeclaration(t)",
+    'underlying_type'           : "lambda t: UnderlyingType(t)",
+    'enumeration_type'          : "lambda t: EnumerationType(t)",
+    'aggregation_types'         : "lambda t: AggregationType(t)",
+    'general_aggregation_types' : "lambda t: AggregationType(t)",
+    'select_type'               : "lambda t: SelectType(t)",
+    'binary_type'               : "lambda t: BinaryType(t)",
+    'subtype_declaration'       : "lambda t: SubtypeExpression(t)",
+    'derive_clause'             : "lambda t: AttributeList('derive', t)",
+    'derived_attr'              : "lambda t: DerivedAttribute(t)",
+    'inverse_clause'            : "lambda t: AttributeList('inverse', t)",
+    'inverse_attr'              : "lambda t: InverseAttribute(t)",
+    'bound_spec'                : "lambda t: BoundSpecification(t)",
+    'explicit_attr'             : "lambda t: ExplicitAttribute(t)",
+}
+
+to_emit = set(id for id, expr in express)
+emitted = set()
+to_combine = set(["simple_id"])
+to_ignore = set(["where_clause", "supertype_constraint", "unique_clause"])
+statements = []
+
+while True:
+    emitted_in_loop = set()
+    for id, expr in express:
+        kws = find_keywords(expr)
+        found = [k in emitted for k in kws]
+        if id in to_emit and all(found):
+            emitted_in_loop.add(id)
+            emitted.add(id)
+            stmt = "(%s)" % expr
+            if id in to_combine:
+                stmt = "originalTextFor(Combine%s)" % stmt
+            if id in actions:
+                stmt = "%s.setParseAction(%s)" % (stmt, actions[id])
+            statements.append("%s = %s" % (id, stmt))
+    to_emit -= emitted_in_loop
+    if not emitted_in_loop: break
+
+for id in to_emit:
+    action = ".setParseAction(%s)" % actions[id] if id in actions else ""
+    statements.append("%s = Forward()%s" % (id, action))
+
+for id in to_emit:
+    expr = [e for k, e in express if k == id][0]
+    stmt = "(%s)" % expr
+    if id in to_combine:
+        stmt = "Suppress%s" % stmt
+    statements.append("%s << %s" % (id, stmt))
+
+print ("""import sys
+from pyparsing import *
+from nodes import *
+
+%s
+
+import schema
+import mapping
+
+import header
+import enum_header
+import implementation
+import latebound_header
+import latebound_implementation
+
+syntax.ignore(Regex(r"\((?:\*(?:[^*]*\*+)+?\))"))
+ast = syntax.parseFile(sys.argv[1])
+schema = schema.Schema(ast)
+mapping = mapping.Mapping(schema)
+
+header.Header(mapping).emit()
+enum_header.EnumHeader(mapping).emit()
+implementation.Implementation(mapping).emit()
+latebound_header.LateBoundHeader(mapping).emit()
+latebound_implementation.LateBoundImplementation(mapping).emit()
+"""%('\n'.join(statements)))

src/ifcexpressparser/documentation.py

@@ -36,7 +36,7 @@ name_to_oid = {}
 oid_to_desc = {}
 oid_to_name = {}
 oid_to_pid = {}
-regices = list(zip([re.compile(s,re.M) for s in [r'<[\w\n=" \-/\.;_\t:%#,\?\(\)]+>',r'(\n[\t ]*){2,}',r'^[\t ]+','^']],['','\n\n','  ','/// ']))
+regices = list(zip([re.compile(s,re.M) for s in [r'<[\w\n=" \-/\.;_\t:%#,\?\(\)]+>',r'(\n[\t ]*){2,}',r'^[\t ]+']],['','\n\n','  ']))
 
 definition_files = ['DocEntity.csv', 'DocEnumeration.csv', 'DocDefined.csv', 'DocSelect.csv']
 for fn in definition_files:
@@ -49,23 +49,22 @@ for fn in definition_files:
 with open('DocEntityAttributes.csv') as f:
     for pid, x, oid in csv.reader(f, delimiter=';', quotechar='"'):
         oid_to_pid[oid] = pid
-        
+
 with open('DocAttribute.csv') as f:
     for oid, name, desc in csv.reader(f, delimiter=';', quotechar='"'):
         pid = oid_to_pid[oid]
         pname = oid_to_name[pid]
         name_to_oid[(pname, name)] = oid
         oid_to_desc[oid] = desc
-        
+
 def description(item):
     global name_to_oid, oid_to_desc, oid_to_name, oid_to_pid
     oid = name_to_oid.get(item,0)
-    desc = oid_to_desc.get(oid,None)
+    desc = oid_to_desc.get(oid, None)
     if desc:
         for a,b in entitydefs.items(): desc = desc.replace("&%s;"%a,b)
         desc = desc.replace("\r","")
-        for r,s in regices[:-1]: desc = r.sub(s,desc)
+        for r,s in regices: desc = r.sub(s,desc)
         desc = desc.strip()
-        r,s = regices[-1]
-        desc = r.sub(s,desc)
-    return desc
+        return desc.split("\n")
+    else: return []

src/ifcexpressparser/enum_header.py

@@ -0,0 +1,38 @@
+###############################################################################
+#                                                                             #
+# This file is part of IfcOpenShell.                                          #
+#                                                                             #
+# IfcOpenShell is free software: you can redistribute it and/or modify        #
+# it under the terms of the Lesser GNU General Public License as published by #
+# the Free Software Foundation, either version 3.0 of the License, or         #
+# (at your option) any later version.                                         #
+#                                                                             #
+# IfcOpenShell is distributed in the hope that it will be useful,             #
+# but WITHOUT ANY WARRANTY; without even the implied warranty of              #
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                #
+# Lesser GNU General Public License for more details.                         #
+#                                                                             #
+# You should have received a copy of the Lesser GNU General Public License    #
+# along with this program. If not, see <http://www.gnu.org/licenses/>.        #
+#                                                                             #
+###############################################################################
+
+import templates
+
+class EnumHeader:
+    def __init__(self, mapping):
+        enumerable_types = sorted(set([name for name, type in mapping.schema.types.items()] + [name for name, type in mapping.schema.entities.items()]))
+        
+        self.str = templates.enum_header % {
+            'schema_name_upper' : mapping.schema.name.upper(),
+            'schema_name'       : mapping.schema.name.capitalize(),
+            'types'             : ', '.join(enumerable_types)
+        }
+        
+        self.schema_name = mapping.schema.name.capitalize()
+    def __repr__(self):
+        return self.str
+    def emit(self):
+        f = open('%senum.h'%self.schema_name, 'w', encoding='utf-8')
+        f.write(str(self))
+        f.close()

src/ifcexpressparser/express.bnf

@@ -0,0 +1,344 @@
+# Taken from http://sourceforge.net/p/exp-engine/expresso/ci/master/tree/docs/iso-10303-11--2004.bnf
+
+ABS = "abs" .
+ABSTRACT = "abstract" .
+ACOS = "acos" .
+AGGREGATE = "aggregate" .
+ALIAS = "alias" .
+AND = "and" .
+ANDOR = "andor" .
+ARRAY = "array" .
+AS = "as" .
+ASIN = "asin" .
+ATAN = "atan" .
+BAG = "bag" .
+BASED_ON = "based_on" .
+BEGIN = "begin" .
+BINARY = "binary" .
+BLENGTH = "blength" .
+BOOLEAN = "boolean" .
+BY = "by" .
+CASE = "case" .
+CONSTANT = "constant" .
+CONST_E = "const_e" .
+COS = "cos" .
+DERIVE = "derive" .
+DIV = "div" .
+ELSE = "else" .
+END = "end" .
+END_ALIAS = "end_alias" .
+END_CASE = "end_case" .
+END_CONSTANT = "end_constant" .
+END_ENTITY = "end_entity" .
+END_FUNCTION = "end_function" .
+END_IF = "end_if" .
+END_LOCAL = "end_local" .
+END_PROCEDURE = "end_procedure" .
+END_REPEAT = "end_repeat" .
+END_RULE = "end_rule" .
+END_SCHEMA = "end_schema" .
+END_SUBTYPE_CONSTRAINT = "end_subtype_constraint" .
+END_TYPE = "end_type" .
+ENTITY = "entity" .
+ENUMERATION = "enumeration" .
+ESCAPE = "escape" .
+EXISTS = "exists" .
+EXTENSIBLE = "extensible" .
+EXP = "exp" .
+FALSE = "false" .
+FIXED = "fixed" .
+FOR = "for" .
+FORMAT = "format" .
+FROM = "from" .
+FUNCTION = "function" .
+GENERIC = "generic" .
+GENERIC_ENTITY = "generic_entity" .
+HIBOUND = "hibound" .
+HIINDEX = "hiindex" .
+IF = "if" .
+IN = "in" .
+INSERT = "insert" .
+INTEGER = "integer" .
+INVERSE = "inverse" .
+LENGTH = "length" .
+LIKE = "like" .
+LIST = "list" .
+LOBOUND = "lobound" .
+LOCAL = "local" .
+LOG = "log" .
+LOG10 = "log10" .
+LOG2 = "log2" .
+LOGICAL = "logical" .
+LOINDEX = "loindex" .
+MOD = "mod" .
+NOT = "not" .
+NUMBER = "number" .
+NVL = "nvl" .
+ODD = "odd" .
+OF = "of" .
+ONEOF = "oneof" .
+OPTIONAL = "optional" .
+OR = "or" .
+OTHERWISE = "otherwise" .
+PI = "pi" .
+PROCEDURE = "procedure" .
+QUERY = "query" .
+REAL = "real" .
+REFERENCE = "reference" .
+REMOVE = "remove" .
+RENAMED = "renamed" .
+REPEAT = "repeat" .
+RETURN = "return" .
+ROLESOF = "rolesof" .
+RULE = "rule" .
+SCHEMA = "schema" .
+SELECT = "select" .
+SELF = "self" .
+SET = "set" .
+SIN = "sin" .
+SIZEOF = "sizeof" .
+SKIP = "skip" .
+SQRT = "sqrt" .
+STRING = "string" .
+SUBTYPE = "subtype" .
+SUBTYPE_CONSTRAINT = "subtype_constraint" .
+SUPERTYPE = "supertype" .
+TAN = "tan" .
+THEN = "then" .
+TO = "to" .
+TOTAL_OVER = "total_over" .
+TRUE = "true" .
+TYPE = "type" .
+TYPEOF = "typeof" .
+UNIQUE = "unique" .
+UNKNOWN = "unknown" .
+UNTIL = "until" .
+USE = "use" .
+USEDIN = "usedin" .
+VALUE = "value" .
+VALUE_IN = "value_in" .
+VALUE_UNIQUE = "value_unique" .
+VAR = "var" .
+WHERE = "where" .
+WHILE = "while" .
+WITH = "with" .
+XOR = "xor" .
+bit = "0" | "1" .
+digit = "0" | "1" | "2" | "3" | "4" | "5" | "6" | "7" | "8" | "9" .
+digits = digit { digit } .
+encoded_character = octet octet octet octet .
+hex_digit = digit | "a" | "b" | "c" | "d" | "e" | "f" .
+letter = "a" | "b" | "c" | "d" | "e" | "f" | "g" | "h" | "i" | "j" | "k" | "l" | "m" | "n" | "o" | "p" | "q" | "r" | "s" | "t" | "u" | "v" | "w" | "x" | "y" | "z" .
+lparen_then_not_lparen_star = "(" { "(" } not_lparen_star { not_lparen_star } .
+not_lparen_star = not_paren_star | ")" .
+not_paren_star = letter | digit | not_paren_star_special .
+not_paren_star_quote_special = "!" | "#" | "$" | "%" | "&" | "+" | "," | "-" | "." | "/" | ":" | ";" | "<" | "=" | ">" | "?" | "@" | "[" | "\\" | "]" | "^" | "_" | "{" | "|" | "}" | "~" .
+not_paren_star_special = not_paren_star_quote_special | "\"\"" .
+not_quote = not_paren_star_quote_special | letter | digit | "(" | ")" | "*" .
+not_rparen_star = not_paren_star | "(" .
+octet = hex_digit hex_digit .
+special = not_paren_star_quote_special | "(" | ")" | "*" | "\"\"" .
+not_rparen_star_then_rparen = not_rparen_star { not_rparen_star } ")" { ")" } .
+binary_literal = "%" bit { bit } .
+encoded_string_literal = "\"" encoded_character { encoded_character } "\"" .
+integer_literal = digits .
+real_literal = ( digits "." [ digits ] [ "e" [ sign ] digits ] ) | integer_literal .
+simple_id = letter { letter | digit | "_" } .
+simple_string_literal = "'" { ( "'" "'" ) | not_quote } "'" .
+embedded_remark = "(*" [ remark_tag ] { ( not_paren_star { not_paren_star } ) | lparen_then_not_lparen_star | ( "*" { "*" } ) | not_rparen_star_then_rparen | embedded_remark } "*)" .
+remark = embedded_remark | tail_remark .
+remark_tag = "\"" remark_ref { "." remark_ref } "\"" .
+remark_ref = attribute_ref | constant_ref | entity_ref | enumeration_ref | function_ref | parameter_ref | procedure_ref | rule_label_ref | rule_ref | schema_ref | subtype_constraint_ref | type_label_ref | type_ref | variable_ref .
+tail_remark = "--" [ remark_tag ] .
+attribute_ref = attribute_id .
+constant_ref = constant_id .
+entity_ref = entity_id .
+enumeration_ref = enumeration_id .
+function_ref = function_id .
+parameter_ref = parameter_id .
+procedure_ref = procedure_id .
+rule_label_ref = rule_label_id .
+rule_ref = rule_id .
+schema_ref = schema_id .
+subtype_constraint_ref = subtype_constraint_id .
+type_label_ref = type_label_id .
+type_ref = type_id .
+variable_ref = variable_id .
+abstract_entity_declaration = ABSTRACT .
+abstract_supertype = ABSTRACT SUPERTYPE ";" .
+abstract_supertype_declaration = ABSTRACT SUPERTYPE [ subtype_constraint ] .
+actual_parameter_list = "(" [ parameter ] { "," parameter } ")" .
+add_like_op = "+" | "-" | OR | XOR .
+aggregate_initializer = "[" [ element { "," element } ] "]" .
+aggregate_source = simple_expression .
+aggregate_type = AGGREGATE [ ":" type_label ] OF parameter_type .
+aggregation_types = array_type | bag_type | list_type | set_type .
+algorithm_head = { declaration } [ constant_decl ] [ local_decl ] .
+alias_stmt = ALIAS variable_id FOR general_ref { qualifier } ";" stmt { stmt } END_ALIAS ";" .
+array_type = ARRAY bound_spec OF [ OPTIONAL ] [ UNIQUE ] instantiable_type .
+assignment_stmt = general_ref { qualifier } ":=" expression ";" .
+attribute_decl = redeclared_attribute | attribute_id .
+attribute_id = simple_id .
+attribute_qualifier = "." attribute_ref .
+bag_type = BAG [ bound_spec ] OF instantiable_type .
+binary_type = BINARY [ width_spec ] .
+boolean_type = BOOLEAN .
+bound_1 = numeric_expression .
+bound_2 = numeric_expression .
+bound_spec = "[" bound_1 ":" bound_2 "]" .
+built_in_constant = CONST_E | PI | SELF | "?" .
+built_in_function = ABS | ACOS | ASIN | ATAN | BLENGTH | COS | EXISTS | EXP | FORMAT | HIBOUND | HIINDEX | LENGTH | LOBOUND | LOINDEX | LOG | LOG2 | LOG10 | NVL | ODD | ROLESOF | SIN | SIZEOF | SQRT | TAN | TYPEOF | USEDIN | VALUE | VALUE_IN | VALUE_UNIQUE .
+built_in_procedure = INSERT | REMOVE .
+case_action = case_label { "," case_label } ":" stmt .
+case_label = expression .
+case_stmt = CASE selector OF { case_action } [ OTHERWISE ":" stmt ] END_CASE ";" .
+compound_stmt = BEGIN stmt { stmt } END ";" .
+concrete_types = aggregation_types | simple_types | type_ref .
+constant_body = constant_id ":" instantiable_type ":=" expression ";" .
+constant_decl = CONSTANT constant_body { constant_body } END_CONSTANT ";" .
+constant_factor = built_in_constant | constant_ref .
+constant_id = simple_id .
+constructed_types = enumeration_type | select_type .
+declaration = entity_decl | function_decl | procedure_decl | subtype_constraint_decl | type_decl .
+derived_attr = attribute_decl ":" parameter_type ":=" expression ";" .
+derive_clause = DERIVE derived_attr { derived_attr } .
+domain_rule = rule_label_id ":" expression .
+element = expression [ ":" repetition ] .
+entity_body = { explicit_attr } [ derive_clause ] [ inverse_clause ] [ unique_clause ] [ where_clause ] .
+entity_constructor = entity_ref "(" [ expression { "," expression } ] ")" .
+entity_decl = entity_head entity_body END_ENTITY ";" .
+entity_head = ENTITY entity_id subsuper ";" .
+entity_id = simple_id .
+enumeration_extension = BASED_ON type_ref [ WITH enumeration_items ] .
+enumeration_id = simple_id .
+enumeration_items = "(" enumeration_id { "," enumeration_id } ")" .
+enumeration_reference = [ type_ref "." ] enumeration_ref .
+enumeration_type = [ EXTENSIBLE ] ENUMERATION [ ( OF enumeration_items ) | enumeration_extension ] .
+escape_stmt = ESCAPE ";" .
+explicit_attr = attribute_decl { "," attribute_decl } ":" [ OPTIONAL ] parameter_type ";" .
+expression = simple_expression [ rel_op_extended simple_expression ] .
+factor = simple_factor [ "**" simple_factor ] .
+formal_parameter = parameter_id { "," parameter_id } ":" parameter_type .
+function_call = ( built_in_function | function_ref ) actual_parameter_list .
+function_decl = function_head algorithm_head stmt { stmt } END_FUNCTION ";" .
+function_head = FUNCTION function_id [ "(" formal_parameter { ";" formal_parameter } ")" ] ":" parameter_type ";" .
+function_id = simple_id .
+generalized_types = aggregate_type | general_aggregation_types | generic_entity_type | generic_type .
+general_aggregation_types = general_array_type | general_bag_type | general_list_type | general_set_type .
+general_array_type = ARRAY [ bound_spec ] OF [ OPTIONAL ] [ UNIQUE ] parameter_type .
+general_bag_type = BAG [ bound_spec ] OF parameter_type .
+general_list_type = LIST [ bound_spec ] OF [ UNIQUE ] parameter_type .
+general_ref = parameter_ref | variable_ref .
+general_set_type = SET [ bound_spec ] OF parameter_type .
+generic_entity_type = GENERIC_ENTITY [ ":" type_label ] .
+generic_type = GENERIC [ ":" type_label ] .
+group_qualifier = "\\" entity_ref .
+if_stmt = IF logical_expression THEN stmt { stmt } [ ELSE stmt { stmt } ] END_IF ";" .
+increment = numeric_expression .
+increment_control = variable_id ":=" bound_1 TO bound_2 [ BY increment ] .
+index = numeric_expression .
+index_1 = index .
+index_2 = index .
+index_qualifier = "[" index_1 [ ":" index_2 ] "]" .
+instantiable_type = concrete_types | entity_ref .
+integer_type = INTEGER .
+interface_specification = reference_clause | use_clause .
+interval = "{" interval_low interval_op interval_item interval_op interval_high "}" .
+interval_high = simple_expression .
+interval_item = simple_expression .
+interval_low = simple_expression .
+interval_op = "<=" | "<" .
+inverse_attr = attribute_decl ":" [ ( SET | BAG ) [ bound_spec ] OF ] entity_ref FOR [ entity_ref "." ] attribute_ref ";" .
+inverse_clause = INVERSE inverse_attr { inverse_attr } .
+list_type = LIST [ bound_spec ] OF [ UNIQUE ] instantiable_type .
+literal = binary_literal | logical_literal | real_literal | string_literal .
+local_decl = LOCAL local_variable { local_variable } END_LOCAL ";" .
+local_variable = variable_id { "," variable_id } ":" parameter_type [ ":=" expression ] ";" .
+logical_expression = expression .
+logical_literal = FALSE | TRUE | UNKNOWN .
+logical_type = LOGICAL .
+multiplication_like_op = "*" | "/" | DIV | MOD | AND | "||" .
+named_types = entity_ref | type_ref .
+named_type_or_rename = named_types [ AS ( entity_id | type_id ) ] .
+null_stmt = ";" .
+number_type = NUMBER .
+numeric_expression = simple_expression .
+one_of = ONEOF "(" supertype_expression { "," supertype_expression } ")" .
+parameter = expression .
+parameter_id = simple_id .
+parameter_type = generalized_types | simple_types | named_types .
+population = entity_ref .
+precision_spec = numeric_expression .
+primary = literal | ( qualifiable_factor { qualifier } ) .
+procedure_call_stmt = ( built_in_procedure | procedure_ref ) actual_parameter_list ";" .
+procedure_decl = procedure_head algorithm_head { stmt } END_PROCEDURE ";" .
+procedure_head = PROCEDURE procedure_id [ "(" [ VAR ] formal_parameter { ";" [ VAR ] formal_parameter } ")" ] ";" .
+procedure_id = simple_id .
+qualifiable_factor = function_call | attribute_ref | constant_factor | general_ref | population .
+qualified_attribute = SELF group_qualifier attribute_qualifier .
+qualifier = attribute_qualifier | group_qualifier | index_qualifier .
+query_expression = QUERY "(" variable_id "<*" aggregate_source "|" logical_expression ")" .
+real_type = REAL [ "(" precision_spec ")" ] .
+redeclared_attribute = qualified_attribute [ RENAMED attribute_id ] .
+referenced_attribute = attribute_ref | qualified_attribute .
+reference_clause = REFERENCE FROM schema_ref [ "(" resource_or_rename { "," resource_or_rename } ")" ] ";" .
+rel_op = "<=" | ">=" | "<>" | "=" | ":<>:" | ":=:" | "<" | ">" .
+rel_op_extended = rel_op | IN | LIKE .
+rename_id = constant_id | entity_id | function_id | procedure_id | type_id .
+repeat_control = [ increment_control ] [ while_control ] [ until_control ] .
+repeat_stmt = REPEAT repeat_control ";" stmt { stmt } END_REPEAT ";" .
+repetition = numeric_expression .
+resource_or_rename = resource_ref [ AS rename_id ] .
+resource_ref = constant_ref | entity_ref | function_ref | procedure_ref | type_ref .
+return_stmt = RETURN [ "(" expression ")" ] ";" .
+rule_decl = rule_head algorithm_head { stmt } where_clause END_RULE ";" .
+rule_head = RULE rule_id FOR "(" entity_ref { "," entity_ref } ")" ";" .
+rule_id = simple_id .
+rule_label_id = simple_id .
+schema_body = { interface_specification } [ constant_decl ] { declaration | rule_decl } .
+schema_decl = SCHEMA schema_id [ schema_version_id ] ";" schema_body END_SCHEMA ";" .
+schema_id = simple_id .
+schema_version_id = string_literal .
+selector = expression .
+select_extension = BASED_ON type_ref [ WITH select_list ] .
+select_list = "(" named_types { "," named_types } ")" .
+select_type = [ EXTENSIBLE [ GENERIC_ENTITY ] ] SELECT [ select_list | select_extension ] .
+set_type = SET [ bound_spec ] OF instantiable_type .
+sign = "+" | "-" .
+simple_expression = term { add_like_op term } .
+simple_factor = aggregate_initializer | interval | query_expression | ( [ unary_op ] ( "(" expression ")" | primary ) ) | entity_constructor | enumeration_reference .
+simple_types = binary_type | boolean_type | integer_type | logical_type | number_type | real_type | string_type .
+skip_stmt = SKIP ";" .
+stmt = alias_stmt | assignment_stmt | case_stmt | compound_stmt | escape_stmt | if_stmt | null_stmt | procedure_call_stmt | repeat_stmt | return_stmt | skip_stmt .
+string_literal = simple_string_literal | encoded_string_literal .
+string_type = STRING [ width_spec ] .
+subsuper = [ supertype_constraint ] [ subtype_declaration ] .
+subtype_constraint = OF "(" supertype_expression ")" .
+subtype_constraint_body = [ abstract_supertype ] [ total_over ] [ supertype_expression ";" ] .
+subtype_constraint_decl = subtype_constraint_head subtype_constraint_body END_SUBTYPE_CONSTRAINT ";" .
+subtype_constraint_head = SUBTYPE_CONSTRAINT subtype_constraint_id FOR entity_ref ";" .
+subtype_constraint_id = simple_id .
+subtype_declaration = SUBTYPE OF "(" entity_ref { "," entity_ref } ")" .
+supertype_constraint = abstract_supertype_declaration | abstract_entity_declaration | supertype_rule .
+supertype_expression = supertype_factor { ANDOR supertype_factor } .
+supertype_factor = supertype_term { AND supertype_term } .
+supertype_rule = SUPERTYPE subtype_constraint .
+supertype_term = one_of | "(" supertype_expression ")" | entity_ref .
+syntax = schema_decl { schema_decl } .
+term = factor { multiplication_like_op factor } .
+total_over = TOTAL_OVER "(" entity_ref { "," entity_ref } ")" ";" .
+type_decl = TYPE type_id "=" underlying_type ";" [ where_clause ] END_TYPE ";" .
+type_id = simple_id .
+type_label = type_label_id | type_label_ref .
+type_label_id = simple_id .
+unary_op = "+" | "-" | NOT .
+underlying_type = constructed_types | concrete_types .
+unique_clause = UNIQUE unique_rule ";" { unique_rule ";" } .
+unique_rule = rule_label_id ":" referenced_attribute { "," referenced_attribute } .
+until_control = UNTIL logical_expression .
+use_clause = USE FROM schema_ref [ "(" named_type_or_rename { "," named_type_or_rename } ")" ] ";" .
+variable_id = simple_id .
+where_clause = WHERE domain_rule ";" { domain_rule ";" } .
+while_control = WHILE logical_expression .
+width = numeric_expression .
+width_spec = "(" width ")" [ FIXED ] .

src/ifcexpressparser/header.py

@@ -0,0 +1,129 @@
+###############################################################################
+#                                                                             #
+# This file is part of IfcOpenShell.                                          #
+#                                                                             #
+# IfcOpenShell is free software: you can redistribute it and/or modify        #
+# it under the terms of the Lesser GNU General Public License as published by #
+# the Free Software Foundation, either version 3.0 of the License, or         #
+# (at your option) any later version.                                         #
+#                                                                             #
+# IfcOpenShell is distributed in the hope that it will be useful,             #
+# but WITHOUT ANY WARRANTY; without even the implied warranty of              #
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                #
+# Lesser GNU General Public License for more details.                         #
+#                                                                             #
+# You should have received a copy of the Lesser GNU General Public License    #
+# along with this program. If not, see <http://www.gnu.org/licenses/>.        #
+#                                                                             #
+###############################################################################
+
+import templates
+import documentation
+
+class Header:
+    def __init__(self, mapping):
+        declarations = []
+
+        write = lambda str, **kwargs: declarations.append(str%dict({
+            'documentation': templates.multi_line_comment(documentation.description(kwargs['name']))}, **kwargs))
+            
+        forward_names = list(mapping.schema.entities.keys()) + list(mapping.schema.simpletypes.keys())
+        forward_definitions = "".join(["class %s; "%n for n in forward_names])
+        
+        for name, type in mapping.schema.selects.items():
+            write(templates.select, name=name)
+
+        for name, type in mapping.schema.enumerations.items():
+            short_name = name[:-4] if name.endswith("Enum") else name
+            write(templates.enumeration, name=name, values=", ".join(["%s_%s"%(short_name, v) for v in type.values]))
+        
+        emitted_simpletypes = set()
+        while len(emitted_simpletypes) < len(mapping.schema.simpletypes):
+            for name, type in mapping.schema.simpletypes.items():
+                if name in emitted_simpletypes: continue
+                type_str = mapping.make_type_string(mapping.flatten_type_string(type))
+                attr_type = mapping.make_argument_type(type)
+                superclass = mapping.simple_type_parent(name)
+                if superclass is None: 
+                    superclass = "IfcUtil::IfcBaseType"
+                elif superclass not in emitted_simpletypes:
+                    continue
+                emitted_simpletypes.add(name)
+                write(templates.simpletype, name=name, type=type_str, attr_type=attr_type, superclass=superclass)
+
+        class_definitions = []
+
+        write = lambda str, **kwargs: class_definitions.append(str%dict({
+            'documentation': templates.multi_line_comment(documentation.description(kwargs['name']))}, **kwargs))
+
+        emitted_entities = set()
+        while len(emitted_entities) < len(mapping.schema.entities):
+            for name, type in mapping.schema.entities.items():
+                if name in emitted_entities: continue
+                if len(type.supertypes) == 0 or set(type.supertypes) < emitted_entities:
+                    attr_lines = []
+                    def write_method(attr):
+                        attr_lines.extend(["/// %s"%d for d in documentation.description((name, attr.name))])
+                        type_str = mapping.get_parameter_type(attr, allow_optional=True, allow_entities=True)
+                        if mapping.make_argument_type(attr) != "IfcUtil::Argument_UNKNOWN":
+                            attr_lines.append("%s %s() const;"%(type_str, attr.name))
+                            attr_lines.append("void %s(%s v);"%(attr.name, type_str))
+
+                    [write_method(attr) for attr in type.attributes]
+
+                    inv_lines = []
+                    def write_inverse(attr):
+                        inv_lines.append(templates.inverse_attr%{'name':attr.name, 'entity':attr.entity, 'attribute':attr.attribute})
+
+                    if type.inverse:
+                        [write_inverse(attr) for attr in type.inverse.elements]
+
+                    attributes = "\n".join(["%s%s"%(' '*4, a) for a in attr_lines])
+                    if len(attributes): attributes += '\n'
+
+                    inverse = "\n".join(["%s%s"%(' '*4, a) for a in inv_lines])
+                    if len(inverse): inverse += '\n'
+
+                    supertypes = type.supertypes if len(type.supertypes) else ['IfcUtil::IfcBaseEntity']
+                    superclass = ": %s "%(", ".join(["public %s"%c for c in supertypes]))
+
+                    argument_count = mapping.argument_count(type)
+
+                    argument_start = argument_count - len(type.attributes)
+
+                    argument_name_function_body_switch_stmt = " switch (i) {%s}"%("".join(['case %d: return "%s"; '%(i+argument_start, attr.name) for i, attr in enumerate(type.attributes)])) if len(type.attributes) else ""
+                    argument_name_function_body_tail = (" return %s::getArgumentName(i); "%type.supertypes[0]) if len(type.supertypes) == 1 else ' throw IfcParse::IfcException("argument out of range"); '
+
+                    argument_name_function_body = argument_name_function_body_switch_stmt + argument_name_function_body_tail
+
+                    argument_type_function_body_switch_stmt = " switch (i) {%s}"%("".join(['case %d: return %s; '%(i+argument_start, mapping.make_argument_type(attr)) for i, attr in enumerate(type.attributes)])) if len(type.attributes) else ""
+                    argument_type_function_body_tail = (" return %s::getArgumentType(i); "%type.supertypes[0]) if len(type.supertypes) == 1 else ' throw IfcParse::IfcException("argument out of range"); '
+
+                    argument_type_function_body = argument_type_function_body_switch_stmt + argument_type_function_body_tail
+                    
+                    argument_entity_function_body_switch_stmt = " switch (i) {%s}"%("".join(['case %d: return %s; '%(i+argument_start, mapping.make_argument_entity(attr)) for i, attr in enumerate(type.attributes)])) if len(type.attributes) else ""
+                    argument_entity_function_body_tail = (" return %s::getArgumentEntity(i); "%type.supertypes[0]) if len(type.supertypes) == 1 else ' throw IfcParse::IfcException("argument out of range"); '
+
+                    argument_entity_function_body = argument_entity_function_body_switch_stmt + argument_entity_function_body_tail
+
+                    constructor_arguments = ", ".join("%(full_type)s v%(index)d_%(name)s"%a for a in mapping.get_assignable_arguments(type))
+
+                    write(templates.entity, **locals())
+                    emitted_entities.add(name)
+
+        self.str = templates.header % {
+            'schema_name_upper'   : mapping.schema.name.upper(),
+            'schema_name'         : mapping.schema.name.capitalize(),
+            'declarations'        : ''.join(declarations),
+            'forward_definitions' : forward_definitions,
+            'class_definitions'   : ''.join(class_definitions)
+        }
+
+        self.schema_name = mapping.schema.name.capitalize()
+    def __repr__(self):
+        return self.str
+    def emit(self):
+        f = open('%s.h'%self.schema_name, 'w', encoding='utf-8')
+        f.write(str(self))
+        f.close()
+

src/ifcexpressparser/implementation.py

@@ -0,0 +1,234 @@
+###############################################################################
+#                                                                             #
+# This file is part of IfcOpenShell.                                          #
+#                                                                             #
+# IfcOpenShell is free software: you can redistribute it and/or modify        #
+# it under the terms of the Lesser GNU General Public License as published by #
+# the Free Software Foundation, either version 3.0 of the License, or         #
+# (at your option) any later version.                                         #
+#                                                                             #
+# IfcOpenShell is distributed in the hope that it will be useful,             #
+# but WITHOUT ANY WARRANTY; without even the implied warranty of              #
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                #
+# Lesser GNU General Public License for more details.                         #
+#                                                                             #
+# You should have received a copy of the Lesser GNU General Public License    #
+# along with this program. If not, see <http://www.gnu.org/licenses/>.        #
+#                                                                             #
+###############################################################################
+
+import templates
+
+class Implementation:
+    def __init__(self, mapping):
+        enumeration_functions = []
+        entity_implementations = []
+        schema_entity_statements = []
+
+        schema_name = mapping.schema.name.capitalize()
+
+        stringify = lambda s: '"%s"'%s
+        cat = lambda vs: "".join(vs)
+        catc = lambda vs: ", ".join(vs)
+        catnl = lambda vs: "\n".join(vs)
+        cator = lambda vs: " || ".join(vs)
+        nl = lambda s: "%s\n"%s if len(s) else s
+
+        write = lambda str, **kwargs: enumeration_functions.append(str%kwargs)
+
+        for name, enum in mapping.schema.enumerations.items():
+            short_name = name[:-4] if name.endswith("Enum") else name
+            context = locals()
+            write(
+                templates.enumeration_function,
+                max_id = len(enum.values),
+                name = name,
+                values = catc(map(stringify, enum.values)),
+                from_string_statements = catnl(templates.enum_from_string_stmt%dict(context,**locals()) for value in enum.values)
+            )
+
+        write = lambda str, **kwargs: entity_implementations.append(str%kwargs)
+
+        for name, type in mapping.schema.entities.items():
+            parent_type_test = "" if not type.supertypes or len(type.supertypes) != 1 \
+                else templates.parent_type_test%(type.supertypes[0])
+            constructor_arguments = mapping.get_assignable_arguments(type, include_derived = True)
+            constructor_arguments_str = catc("%(full_type)s v%(index)d_%(name)s"%a for a in constructor_arguments if not a['is_derived'])
+            attributes = []
+            constructor_implementations = []
+            write_attr = lambda str, **kwargs: attributes.append(str%kwargs)
+            for arg in constructor_arguments:
+                if not arg['is_inherited'] and not arg['is_derived']:
+                    
+                    def find_template(arg):
+                        simple = mapping.schema.is_simpletype(arg['list_instance_type'])
+                        select = arg['list_instance_type'] == "IfcUtil::IfcBaseClass"
+                        express = arg['list_instance_type'] in mapping.express_to_cpp_typemapping
+                        if arg['is_optional']:
+                            if arg['is_enum']: return templates.get_attr_stmt_optional_enum
+                            elif arg['is_nested']: return templates.get_attr_stmt_optional_nested_array
+                            elif arg['is_array'] and not (select or simple or express): return templates.get_attr_stmt_optional_array
+                            elif arg['non_optional_type'].endswith('*'): return templates.get_attr_stmt_optional_entity
+                            else: return templates.get_attr_stmt_generic
+                        else:
+                            if arg['is_enum']: return templates.get_attr_stmt_enum
+                            elif arg['is_nested']: return templates.get_attr_stmt_nested_array
+                            elif arg['is_array'] and not (select or simple or express): return templates.get_attr_stmt_array
+                            elif arg['non_optional_type'].endswith('*'): return templates.get_attr_stmt_entity
+                            else: return templates.get_attr_stmt_generic
+
+                    tmpl = find_template(arg)
+                    write_attr(
+                        templates.const_function,
+                        class_name  = name,
+                        name        = arg['name'],
+                        arguments   = '',
+                        return_type = arg['full_type'],
+                        body        = tmpl % {'index': arg['index']-1,
+                                              'type' : arg['non_optional_type'].split('::')[0],
+                                              'list_instance_type' : arg['list_instance_type']}
+                    )
+                    
+                    def find_template(arg):
+                        simple = mapping.schema.is_simpletype(arg['list_instance_type'])
+                        select = arg['list_instance_type'] == "IfcUtil::IfcBaseClass"
+                        express = arg['list_instance_type'] in mapping.express_to_cpp_typemapping
+                        if arg['is_optional']:
+                            if arg['is_enum']: return templates.set_attr_stmt_optional_enum
+                            elif arg['is_array'] and not (select or simple or express): return templates.set_attr_stmt_optional_array
+                            else: return templates.set_attr_stmt_optional_generic
+                        else:
+                            if arg['is_enum']: return templates.set_attr_stmt_enum
+                            elif arg['is_array'] and not (select or simple or express): return templates.set_attr_stmt_array
+                            else: return templates.set_attr_stmt_generic
+
+                    tmpl = find_template(arg)
+                    write_attr(
+                        templates.function,
+                        class_name  = name,
+                        name        = arg['name'],
+                        arguments   = '%s v'%arg['full_type'],
+                        return_type = 'void',
+                        body        = tmpl % {'index': arg['index']-1,
+                                              'type' : arg['non_optional_type'].split('::')[0]}
+                    )
+
+                if arg['is_derived']:
+                    constructor_implementations.append(templates.constructor_stmt_derived % {'index' : arg['index']-1})
+                else:
+                    arg_name = "v%(index)d_%(name)s"%arg
+                    deref_name = ("*%s"%arg_name) if arg['is_optional'] else arg_name
+
+                    tmpl = templates.constructor_stmt_array if arg['is_templated_list'] \
+                        else templates.constructor_stmt_enum if arg['is_enum'] \
+                        else templates.constructor_stmt
+                    impl = tmpl % {'name'  : deref_name,
+                                   'index' : arg['index']-1,
+                                   'type'  : arg['non_optional_type'].split('::')[0]}
+                    if arg['is_optional']:
+                        impl = templates.constructor_stmt_optional%{'name'  : arg_name,
+                                                            'index' : arg['index']-1,
+                                                            'stmt'  : impl}
+                    constructor_implementations.append(impl)
+                    
+            def get_attribute_index(entity, attr_name):
+                related_entity = mapping.schema.entities[entity]
+                return [a['name'] for a in mapping.get_assignable_arguments(related_entity, include_derived=True)].index(attr_name)
+
+            inverse = [templates.const_function % {
+                'class_name'  : name,
+                'name'        : i.name,
+                'arguments'   : '',
+                'return_type' : '%s::list::ptr' % i.entity,
+                'body'        : templates.get_inverse % {'type': i.entity, 'index':get_attribute_index(i.entity, i.attribute)}
+            } for i in (type.inverse.elements if type.inverse else [])]
+
+            superclass = "%s((IfcAbstractEntity*)0)" % type.supertypes[0] if len(type.supertypes) == 1 else 'IfcUtil::IfcBaseEntity()'
+
+            write(
+                templates.entity_implementation,
+                name                       = name,
+                parent_type_test           = parent_type_test,
+                constructor_arguments      = constructor_arguments_str,
+                constructor_implementation = cat(constructor_implementations),
+                attributes                 = nl(catnl(attributes)),
+                inverse                    = nl(catnl(inverse)),
+                superclass                 = superclass
+            )
+
+        selectable_simple_types = sorted(set(sum([b.values for a,b in mapping.schema.selects.items()], [])) & set(mapping.schema.types.keys()))
+        schema_entity_statements += [templates.schema_entity_stmt%locals() for name, type in mapping.schema.simpletypes.items()]
+        schema_entity_statements += [templates.schema_entity_stmt%locals() for name, type in mapping.schema.entities.items()]
+
+        enumerable_types = sorted(set([name for name, type in mapping.schema.types.items()] + [name for name, type in mapping.schema.entities.items()]))
+        max_len = max(map(len, enumerable_types))
+        type_name_strings = catc(map(stringify, enumerable_types))
+        string_map_statements = [templates.string_map_statement % {
+            'uppercase_name' : name.upper(),
+            'name'           : name,
+            'padding'        : ' ' * (max_len - len(name))
+        } for name in enumerable_types]
+
+        parent_type_statements = [templates.parent_type_stmt % {
+            'name'    : name,
+            'parent'  : type.supertypes[0],
+            'padding' : ' ' * (max_len - len(name))
+        } for name, type in mapping.schema.entities.items() if type.supertypes and len(type.supertypes) == 1]
+
+        max_id = len(enumerable_types)
+
+        simple_type_statements = cator("v == Type::%s"%name for name in selectable_simple_types)
+        
+        simple_type_impl = []
+        for class_name, type in mapping.schema.simpletypes.items():
+            type_str = mapping.make_type_string(mapping.flatten_type_string(type))
+            attr_type = mapping.make_argument_type(type)
+            superclass = mapping.simple_type_parent(class_name)
+            
+            simpletype_impl_is = templates.simpletype_impl_is_with_supertype if superclass \
+                else templates.simpletype_impl_is_without_supertype
+                
+            constructor = templates.constructor_single_initlist if superclass \
+                else templates.constructor
+            
+            def compose(params):
+                class_name, attr_type, superclass, superclass_init, name, tmpl, return_type, args, body = params
+                arguments = ",".join(args)
+                body = body % locals()
+                return tmpl % locals()
+                
+            simple_type_impl.append(templates.simpletype_impl_comment % {'name': class_name})
+            simple_type_impl.extend(map(compose, map(lambda x: (class_name, attr_type, superclass, "(IfcAbstractEntity*)0")+x, (
+                ('getArgumentType', templates.const_function,       'IfcUtil::ArgumentType', ('unsigned int i',),       templates.simpletype_impl_argument_type       ),
+                ('getArgument',     templates.const_function,       'Argument*',             ('unsigned int i',),       templates.simpletype_impl_argument            ),
+                ('is',              templates.const_function,       'bool',                  ('Type::Enum v',),                   simpletype_impl_is                  ),
+                ('type',            templates.const_function,       'Type::Enum',            (),                        templates.simpletype_impl_type                ),
+                ('Class',           templates.function,             'Type::Enum',            (),                        templates.simpletype_impl_class               ),
+                ('',                          constructor,          '',                      ('IfcAbstractEntity* e',), templates.simpletype_impl_explicit_constructor),
+                ('',                          constructor,          '',                      ("%s v" % type_str,),      templates.simpletype_impl_constructor         ),
+                ('',                templates.cast_function,        type_str,                (),                        templates.simpletype_impl_cast                )
+            ))))
+            simple_type_impl.append('')
+
+        self.str = templates.implementation % {
+            'schema_name_upper'        : mapping.schema.name.upper(),
+            'schema_name'              : mapping.schema.name.capitalize(),
+            'max_id'                   : max_id,
+            'enumeration_functions'    : cat(enumeration_functions),
+            'schema_entity_statements' : catnl(schema_entity_statements),
+            'type_name_strings'        : type_name_strings,
+            'string_map_statements'    : catnl(string_map_statements),
+            'simple_type_statement'    : simple_type_statements,
+            'parent_type_statements'   : catnl(parent_type_statements),
+            'entity_implementations'   : catnl(entity_implementations),
+            'simple_type_impl'         : catnl(simple_type_impl)
+        }
+
+        self.schema_name = mapping.schema.name.capitalize()
+    def __repr__(self):
+        return self.str
+    def emit(self):
+        f = open('%s.cpp'%self.schema_name, 'w', encoding='utf-8')
+        f.write(str(self))
+        f.close()
+

src/ifcexpressparser/latebound_header.py

@@ -0,0 +1,35 @@
+###############################################################################
+#                                                                             #
+# This file is part of IfcOpenShell.                                          #
+#                                                                             #
+# IfcOpenShell is free software: you can redistribute it and/or modify        #
+# it under the terms of the Lesser GNU General Public License as published by #
+# the Free Software Foundation, either version 3.0 of the License, or         #
+# (at your option) any later version.                                         #
+#                                                                             #
+# IfcOpenShell is distributed in the hope that it will be useful,             #
+# but WITHOUT ANY WARRANTY; without even the implied warranty of              #
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                #
+# Lesser GNU General Public License for more details.                         #
+#                                                                             #
+# You should have received a copy of the Lesser GNU General Public License    #
+# along with this program. If not, see <http://www.gnu.org/licenses/>.        #
+#                                                                             #
+###############################################################################
+
+import templates
+
+class LateBoundHeader:
+    def __init__(self, mapping):
+        self.str = templates.lb_header % {
+            'schema_name_upper' : mapping.schema.name.upper(),
+            'schema_name'       : mapping.schema.name.capitalize()
+        }
+        
+        self.schema_name = mapping.schema.name.capitalize()
+    def __repr__(self):
+        return self.str
+    def emit(self):
+        f = open('%s-latebound.h'%self.schema_name, 'w', encoding='utf-8')
+        f.write(str(self))
+        f.close()

src/ifcexpressparser/latebound_implementation.py

@@ -0,0 +1,119 @@
+###############################################################################
+#                                                                             #
+# This file is part of IfcOpenShell.                                          #
+#                                                                             #
+# IfcOpenShell is free software: you can redistribute it and/or modify        #
+# it under the terms of the Lesser GNU General Public License as published by #
+# the Free Software Foundation, either version 3.0 of the License, or         #
+# (at your option) any later version.                                         #
+#                                                                             #
+# IfcOpenShell is distributed in the hope that it will be useful,             #
+# but WITHOUT ANY WARRANTY; without even the implied warranty of              #
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                #
+# Lesser GNU General Public License for more details.                         #
+#                                                                             #
+# You should have received a copy of the Lesser GNU General Public License    #
+# along with this program. If not, see <http://www.gnu.org/licenses/>.        #
+#                                                                             #
+###############################################################################
+
+import templates
+
+class LateBoundImplementation:
+    def __init__(self, mapping):
+        schema_name = mapping.schema.name.capitalize()
+        
+        entity_descriptors = []
+        enumeration_descriptors = []
+        derived_field_statements = []
+        inverse_implementations = []
+        
+        for name, type in mapping.schema.simpletypes.items():
+            entity_descriptors.append(templates.entity_descriptor % {
+                'type'                         : name,
+                'parent_statement'             : '0',
+                'entity_descriptor_attributes' : templates.entity_descriptor_attribute_without_entity % {
+                    'name'     : 'wrappedValue',
+                    'optional' : 'false',
+                    'type'     : mapping.make_argument_type(mapping.schema.types[name].type)
+                }
+            })
+            
+        emitted_entities = set()
+        entities_to_emit = mapping.schema.entities.keys()
+        while len(emitted_entities) < len(mapping.schema.entities):
+            for name, type in mapping.schema.entities.items():
+                if name in emitted_entities: continue
+                if len(type.supertypes) == 0 or set(type.supertypes) < emitted_entities:
+                    constructor_arguments = mapping.get_assignable_arguments(type, include_derived = True)
+                    entity_descriptor_attributes = []
+                    for arg in constructor_arguments:
+                        if not arg['is_inherited']:
+                            is_enumeration = arg['argument_type_enum'] == 'IfcUtil::Argument_ENUMERATION'
+                            tmpl = templates.entity_descriptor_attribute_with_entity
+                            entity_name = arg['argument_type'] if is_enumeration else arg['argument_entity'].split('::')[1]
+                            entity_descriptor_attributes.append(tmpl % {
+                                'name'       : arg['name'],
+                                'optional'   : 'true' if arg['is_optional'] else 'false',
+                                'type'       : arg['argument_type_enum'],
+                                'entity_name': entity_name
+                            })
+                        
+                    emitted_entities.add(name)
+                    parent_statement = '0' if len(type.supertypes) != 1 else templates.entity_descriptor_parent % {
+                        'type' : type.supertypes[0]
+                    }
+                    entity_descriptors.append(templates.entity_descriptor % {
+                        'type'                         : name,
+                        'parent_statement'             : parent_statement,
+                        'entity_descriptor_attributes' : '\n'.join(entity_descriptor_attributes)
+                    })
+                    
+        for name, enum in mapping.schema.enumerations.items():
+            enumeration_descriptor_values = '\n'.join([templates.enumeration_descriptor_value % {
+                'name' : v
+            } for v in enum.values])
+            enumeration_descriptors.append(templates.enumeration_descriptor % {
+                'type'                          : name,
+                'enumeration_descriptor_values' : enumeration_descriptor_values
+            })
+            
+        for name, type in mapping.schema.entities.items():
+            constructor_arguments = mapping.get_assignable_arguments(type, include_derived = True)
+            statements = ''.join(templates.derived_field_statement_attrs % (a['index']-1) for a in constructor_arguments if a['is_derived'])
+            if len(statements):
+                derived_field_statements.append(templates.derived_field_statement % {
+                    'type'       : name,
+                    'statements' : statements
+                })
+                
+        for name, type in mapping.schema.entities.items():
+            if type.inverse:
+                for attr in type.inverse.elements:
+                    related_entity = mapping.schema.entities[attr.entity]
+                    related_attrs = [a['name'] for a in mapping.get_assignable_arguments(related_entity, include_derived=True)]
+
+                    inverse_implementations.append(templates.inverse_implementation % {
+                        'type'         : name,
+                        'name'         : attr.name,
+                        'related_type' : attr.entity,
+                        'index'        : related_attrs.index(attr.attribute)
+                    })
+
+        self.str = templates.lb_implementation % {
+            'schema_name_upper'        : mapping.schema.name.upper(),
+            'schema_name'              : mapping.schema.name.capitalize(),
+            'entity_descriptors'       : '\n'.join(entity_descriptors),
+            'enumeration_descriptors'  : '\n'.join(enumeration_descriptors),
+            'derived_field_statements' : '\n'.join(derived_field_statements),
+            'inverse_implementations'  : '\n'.join(inverse_implementations)
+        }
+
+        self.schema_name = mapping.schema.name.capitalize()
+    def __repr__(self):
+        return self.str
+    def emit(self):
+        f = open('%s-latebound.cpp'%self.schema_name, 'w', encoding='utf-8')
+        f.write(str(self))
+        f.close()
+

src/ifcexpressparser/mapping.py

@@ -0,0 +1,199 @@
+###############################################################################
+#                                                                             #
+# This file is part of IfcOpenShell.                                          #
+#                                                                             #
+# IfcOpenShell is free software: you can redistribute it and/or modify        #
+# it under the terms of the Lesser GNU General Public License as published by #
+# the Free Software Foundation, either version 3.0 of the License, or         #
+# (at your option) any later version.                                         #
+#                                                                             #
+# IfcOpenShell is distributed in the hope that it will be useful,             #
+# but WITHOUT ANY WARRANTY; without even the implied warranty of              #
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                #
+# Lesser GNU General Public License for more details.                         #
+#                                                                             #
+# You should have received a copy of the Lesser GNU General Public License    #
+# along with this program. If not, see <http://www.gnu.org/licenses/>.        #
+#                                                                             #
+###############################################################################
+
+import nodes
+import templates
+
+class Mapping:
+
+    express_to_cpp_typemapping = {
+        'boolean' : 'bool',
+        'logical' : 'bool',
+        'integer' : 'int',
+        'real'    : 'double',
+        'number'  : 'double',
+        'string'  : 'std::string'
+    }
+
+    def __init__(self, schema):
+        self.schema = schema
+        
+    def flatten_type_string(self, type):
+        return self.flatten_type_string(self.schema.types[type].type.type) if self.schema.is_simpletype(type) else type
+        
+    def flatten_type(self, type):
+        res = self.flatten_type(self.schema.types[type].type.type) if self.schema.is_simpletype(type) else type
+        return res
+        
+    def simple_type_parent(self, type):
+        parent = self.schema.types[type].type.type
+        if isinstance(parent, nodes.AggregationType): parent = None
+        return None if parent in self.express_to_cpp_typemapping else parent
+
+    def make_type_string(self, type):
+        if isinstance(type, str):
+            return self.express_to_cpp_typemapping.get(type, type)
+        else:
+            is_list = self.schema.is_entity(type.type)
+            is_nested_list = isinstance(type.type, nodes.AggregationType)
+            tmpl = templates.list_list_type if is_nested_list else templates.list_type if is_list else templates.array_type
+            return tmpl % {
+                'instance_type' : self.make_type_string(type.type),
+                'lower'         : type.bounds.lower,
+                'upper'         : type.bounds.upper,
+            }
+
+    def is_array(self, type):
+        if isinstance(type, nodes.AggregationType):
+            return True
+        elif isinstance(type, str) and self.schema.is_type(type):
+            return self.is_array(self.schema.types[type].type.type)
+        else:
+            return False
+            
+    def make_argument_entity(self, attr):
+        type = attr.type if hasattr(attr, 'type') else attr
+        while isinstance(type, nodes.AggregationType): type = type.type
+        if type in self.express_to_cpp_typemapping or isinstance(type, nodes.BinaryType): return "Type::UNDEFINED"
+        else: return "Type::%s" % type        
+
+    def make_argument_type(self, attr):
+        def _make_argument_type(type):
+            if type in self.express_to_cpp_typemapping:
+                return self.express_to_cpp_typemapping.get(type, type).split('::')[-1].upper()
+            elif self.schema.is_entity(type):
+                return "ENTITY"
+            elif self.schema.is_type(type):
+                return _make_argument_type(self.schema.types[type].type.type)
+            elif isinstance(type, nodes.BinaryType):
+                return "UNKNOWN"
+            elif isinstance(type, nodes.EnumerationType):
+                return "ENUMERATION"
+            elif isinstance(type, nodes.SelectType):
+                return "ENTITY"
+            elif isinstance(type, nodes.AggregationType):
+                ty = _make_argument_type(type.type)
+                if ty == "UNKNOWN": return "UNKNOWN"
+                return "%s_LIST"%ty if ty.startswith("ENTITY") else ("VECTOR_%s"%ty)
+            else: raise ValueError
+        supported = {'INT', 'BOOL', 'DOUBLE', 'STRING', 'VECTOR_INT', 'VECTOR_DOUBLE', 'VECTOR_STRING', 'ENTITY', 'ENTITY_LIST', 'ENTITY_LIST_LIST', 'ENUMERATION'}
+        ty = _make_argument_type(attr.type if hasattr(attr, 'type') else attr)
+        if ty not in supported: ty = 'UNKNOWN'
+        return "IfcUtil::Argument_%s" % ty
+
+    def get_type_dep(self, type):
+        if isinstance(type, str):
+            return self.express_to_cpp_typemapping.get(type, type)
+        else:
+            return self.get_type_dep(type.type)
+
+    def get_parameter_type(self, attr, allow_optional, allow_entities, allow_pointer = True):
+        
+        attr_type = self.flatten_type(attr.type)
+        type_str = self.express_to_cpp_typemapping.get(str(attr_type), attr_type)
+        
+        if self.schema.is_enumeration(attr_type):
+            type_str = '%s::%s'%(attr_type, attr_type)
+        elif isinstance(type_str, nodes.AggregationType):
+            is_nested_list = isinstance(attr_type.type, nodes.AggregationType)
+            ty = self.get_parameter_type(attr_type.type if is_nested_list else attr_type, False, allow_entities, False)
+            if True and self.schema.is_select(attr_type.type):
+                type_str = templates.untyped_list
+            elif self.schema.is_simpletype(ty) or ty in self.express_to_cpp_typemapping.values():
+                type_str = templates.array_type % {
+                    'instance_type' : ty,
+                    'lower'         : attr_type.bounds.lower,
+                    'upper'         : attr_type.bounds.upper
+                }
+            else:
+                tmpl = templates.list_list_type if is_nested_list else templates.list_type
+                type_str = tmpl % {
+                    'instance_type': ty
+                }
+        elif allow_pointer and (self.schema.is_entity(type_str) or self.schema.is_select(type_str)):
+            type_str += '*'
+        elif not allow_pointer and self.schema.is_select(type_str):
+            type_str = "IfcUtil::IfcBaseClass*"
+        if allow_optional and attr.optional:# and not is_ptr:
+            type_str = "boost::optional< %s >"%type_str
+        return type_str
+
+    def argument_count(self, t):
+        c = sum([self.argument_count(self.schema.entities[s]) for s in t.supertypes])
+        return c + len(t.attributes)
+
+    def arguments(self, t):
+        c = sum([self.arguments(self.schema.entities[s]) for s in t.supertypes], [])
+        return c + t.attributes
+
+    def derived_in_supertype(self, t):
+        c = sum([self.derived_in_supertype(self.schema.entities[s]) for s in t.supertypes], [])
+        return c + ([str(s) for s in t.derive.elements] if t.derive else [])
+
+    def list_instance_type(self, attr):
+        f = lambda v : 'IfcUtil::IfcBaseClass' if self.schema.is_select(v) else v
+        if self.is_array(attr.type):
+            if not isinstance(attr.type, str) and self.is_array(attr.type.type):
+                if isinstance(attr.type.type, str):
+                    return f(attr.type.type)
+                else: return f(attr.type.type.type)
+            else:
+                if isinstance(attr.type, str):
+                    return f(attr.type)
+                else: return f(attr.type.type)
+        return None
+
+    def is_templated_list(self, attr):
+        ty = self.list_instance_type(attr)
+        arr = self.is_array(attr.type)
+        simple = self.schema.is_simpletype(ty)
+        express = ty in self.express_to_cpp_typemapping
+        select = ty == 'IfcUtil::IfcBaseClass'
+        return arr and not simple and not express and not select
+
+    def get_assignable_arguments(self, t, include_derived = False):
+        count = self.argument_count(t)
+        num_inherited = count - len(t.attributes)
+        derived = set(self.derived_in_supertype(t))
+        attrs = enumerate(self.arguments(t))
+
+        def include(attr):
+            not_derived = include_derived or (attr.name not in derived)
+            supported = self.make_argument_type(attr) != "IfcUtil::Argument_UNKNOWN"
+            return not_derived and supported
+
+        return [{
+            'index'              : i+1,
+            'name'               : attr.name,
+            'full_type'          : self.get_parameter_type(attr, allow_optional=True, allow_entities=True),
+            'specialized_type'   : self.get_parameter_type(attr, allow_optional=True, allow_entities=False),
+            'non_optional_type'  : self.get_parameter_type(attr, allow_optional=False, allow_entities=False),
+            'list_instance_type' : self.list_instance_type(attr),
+            'is_optional'        : attr.optional,
+            'is_inherited'       : i < num_inherited,
+            'is_enum'            : attr.type in self.schema.enumerations,
+            'is_array'           : self.is_array(attr.type),
+            'is_nested'          : self.is_array(attr.type) and not isinstance(attr.type, str) and self.is_array(attr.type.type),
+            'is_derived'         : attr.name in derived,
+            'is_templated_list'  : self.is_templated_list(attr),
+            'argument_type_enum' : self.make_argument_type(attr),
+            'argument_entity'    : self.make_argument_entity(attr),
+            'argument_type'      : attr.type
+        } for i, attr in attrs if include(attr)]
+

src/ifcexpressparser/nodes.py

@@ -0,0 +1,175 @@
+###############################################################################
+#                                                                             #
+# This file is part of IfcOpenShell.                                          #
+#                                                                             #
+# IfcOpenShell is free software: you can redistribute it and/or modify        #
+# it under the terms of the Lesser GNU General Public License as published by #
+# the Free Software Foundation, either version 3.0 of the License, or         #
+# (at your option) any later version.                                         #
+#                                                                             #
+# IfcOpenShell is distributed in the hope that it will be useful,             #
+# but WITHOUT ANY WARRANTY; without even the implied warranty of              #
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                #
+# Lesser GNU General Public License for more details.                         #
+#                                                                             #
+# You should have received a copy of the Lesser GNU General Public License    #
+# along with this program. If not, see <http://www.gnu.org/licenses/>.        #
+#                                                                             #
+###############################################################################
+
+import string
+import collections
+
+class Node:
+    def __init__(self, tokens):
+        self.tokens = tokens
+        self.init()
+    def tokens_of_type(self, cls):
+        return [t for t in self.tokens if isinstance(t, cls)]
+    def single_token_of_type(self, cls, k = None, v = None):
+        ts = [t for t in self.tokens if isinstance(t, cls) and (k is None or getattr(t, k) == v)]
+        return ts[0] if len(ts) == 1 else None
+
+
+class TypeDeclaration(Node):
+    name = property(lambda self: self.tokens[1])
+    type = property(lambda self: self.tokens[3])
+    def init(self):
+        assert self.tokens[0] == 'type'
+        assert isinstance(self.type, UnderlyingType)
+    def __repr__(self):
+        return "%s = TypeDeclaration(%s)" % (self.name, self.type)
+
+
+class EntityDeclaration(Node):
+    name = property(lambda self: self.tokens[1])
+    attributes = property(lambda self: self.tokens_of_type(ExplicitAttribute))
+    def init(self):
+        assert self.tokens[0] == 'entity'
+        s = self.single_token_of_type(SubtypeExpression)
+        self.inverse = self.single_token_of_type(AttributeList, 'type', 'inverse')
+        self.derive = self.single_token_of_type(AttributeList, 'type', 'derive')
+        self.supertypes = s.types if s else []
+    def __repr__(self):
+        builder = ""
+        builder += "Entity(%s)" % (self.name)
+        if len(self.supertypes):
+            builder += "\n  Supertypes: %s"%(",".join(self.supertypes))
+        if len(self.attributes):
+            builder += "\n  Attributes: %s"%("".join(["\n    %s"%a for a in self.attributes]))
+        if self.derive:
+            builder += "\n  Derive:"
+            builder += str(self.derive)
+        if self.inverse:
+            builder += "\n  Inverse:"
+            builder += str(self.inverse)
+        builder += "\n"
+        return builder
+
+
+class UnderlyingType(Node):
+    type = property(lambda self: self.tokens[0])
+    def init(self):
+        pass
+    def __repr__(self):
+        return repr(self.type)
+
+
+class EnumerationType(Node):
+    type = property(lambda self: self.tokens[0])
+    values = property(lambda self: self.tokens[3::2])
+    def init(self):
+        assert self.type == 'enumeration'
+    def __repr__(self):
+        return ",".join(self.values)
+
+
+class AggregationType(Node):
+    aggregate_type = property(lambda self: self.tokens[0])
+    bounds = property(lambda self: None if self.tokens[1] == 'of' else self.tokens[1])
+    type = property(lambda self: self.tokens[-1])
+    def init(self):
+        assert self.bounds is None or isinstance(self.bounds, BoundSpecification)
+    def __repr__(self):
+        return "%s%s of %s"%(self.aggregate_type, self.bounds, self.type)
+
+
+class SelectType(Node):
+    type = property(lambda self: self.tokens[0])
+    values = property(lambda self: self.tokens[2::2])
+    def init(self):
+        assert self.type == 'select'
+    def __repr__(self):
+        return ",".join(self.values)
+
+
+class SubSuperTypeExpression(Node):
+    type = property(lambda self: self.tokens[0])
+    types = property(lambda self: self.tokens[3::2])
+    def init(self):
+        assert self.type == self.class_type
+
+
+class SubtypeExpression(SubSuperTypeExpression):
+    class_type = 'subtype'
+
+
+class AttributeList(Node):
+    elements = property(lambda self: self.tokens[1:])
+    def __init__(self, ty, toks):
+        self.type = ty
+        Node.__init__(self, toks)
+    def init(self):
+        assert self.type == self.tokens[0]
+    def __repr__(self):
+        return "".join(["\n    %s"%s for s in self.elements])
+
+
+class InverseAttribute(Node):
+    name = property(lambda self: self.tokens[0])
+    type = property(lambda self: self.tokens[2])
+    bounds = property(lambda self: None if len(self.tokens) == 6 else self.tokens[3])
+    entity = property(lambda self: self.tokens[-4])
+    attribute = property(lambda self: self.tokens[-2])
+    def init(self):
+        assert self.bounds is None or isinstance(self.bounds, BoundSpecification)
+    def __repr__(self):
+        return "%s = %s.%s (%s%s)"%(self.name, self.entity, self.attribute, self.type, self.bounds or "")
+
+
+class DerivedAttribute(Node):
+    def init(self):
+        name_index = list(self.tokens).index(':') - 1
+        self.name = self.tokens[name_index]
+    def __repr__(self):
+        return str(self.name)
+
+
+class BinaryType(Node):
+    def init(self):
+        pass
+    def __repr__(self):
+        return "BINARY"
+
+
+class BoundSpecification(Node):
+    lower = property(lambda self: self.tokens[1])
+    upper = property(lambda self: self.tokens[3])
+    def init(self):
+        # assert self.lower in string.digits or self.lower == '?'
+        # assert self.upper in string.digits or self.upper == '?'
+        pass
+    def __repr__(self):
+        return "[%s:%s]"%(self.lower, self.upper)
+
+
+class ExplicitAttribute(Node):
+    name = property(lambda self: self.tokens[0])
+    type = property(lambda self: self.tokens[-2])
+    optional = property(lambda self: len(self.tokens) == 5 and self.tokens[-3] == 'optional')
+    def init(self):
+        # NB: This assumes a single name per attribute
+        # definition, which is not necessarily the case.
+        assert self.tokens[1] == ':'
+    def __repr__(self):
+        return "%s : %s%s" % (self.name, self.type, " ?" if self.optional else "")

src/ifcexpressparser/schema.py

@@ -0,0 +1,46 @@
+###############################################################################
+#                                                                             #
+# This file is part of IfcOpenShell.                                          #
+#                                                                             #
+# IfcOpenShell is free software: you can redistribute it and/or modify        #
+# it under the terms of the Lesser GNU General Public License as published by #
+# the Free Software Foundation, either version 3.0 of the License, or         #
+# (at your option) any later version.                                         #
+#                                                                             #
+# IfcOpenShell is distributed in the hope that it will be useful,             #
+# but WITHOUT ANY WARRANTY; without even the implied warranty of              #
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                #
+# Lesser GNU General Public License for more details.                         #
+#                                                                             #
+# You should have received a copy of the Lesser GNU General Public License    #
+# along with this program. If not, see <http://www.gnu.org/licenses/>.        #
+#                                                                             #
+###############################################################################
+
+import nodes
+import collections
+
+class Schema:
+    def is_enumeration(self, v):
+        return v in self.enumerations
+    def is_select(self, v):
+        return v in self.selects
+    def is_simpletype(self, v):
+        return v in self.simpletypes
+    def is_type(self, v):
+        return v in self.types
+    def is_entity(self, v):
+        return v in self.entities
+    def __init__(self, parsetree):
+        self.name = parsetree[1]
+
+        sort = lambda d: collections.OrderedDict(sorted(d.items()))
+
+        self.types = sort({t.name:t for t in parsetree if isinstance(t, nodes.TypeDeclaration)})
+        self.entities = sort({t.name:t for t in parsetree if isinstance(t, nodes.EntityDeclaration)})
+
+        of_type = lambda *types: sort({a: b.type.type for a,b in self.types.items() if any(isinstance(b.type.type, ty) for ty in types)})
+
+        self.enumerations = of_type(nodes.EnumerationType)
+        self.selects = of_type(nodes.SelectType)
+        self.simpletypes = of_type(str, nodes.AggregationType)

src/ifcexpressparser/templates.py

@@ -0,0 +1,448 @@
+###############################################################################
+#                                                                             #
+# This file is part of IfcOpenShell.                                          #
+#                                                                             #
+# IfcOpenShell is free software: you can redistribute it and/or modify        #
+# it under the terms of the Lesser GNU General Public License as published by #
+# the Free Software Foundation, either version 3.0 of the License, or         #
+# (at your option) any later version.                                         #
+#                                                                             #
+# IfcOpenShell is distributed in the hope that it will be useful,             #
+# but WITHOUT ANY WARRANTY; without even the implied warranty of              #
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                #
+# Lesser GNU General Public License for more details.                         #
+#                                                                             #
+# You should have received a copy of the Lesser GNU General Public License    #
+# along with this program. If not, see <http://www.gnu.org/licenses/>.        #
+#                                                                             #
+###############################################################################
+
+header = """
+#ifndef %(schema_name_upper)s_H
+#define %(schema_name_upper)s_H
+
+#include <string>
+#include <vector>
+#include <map>
+
+#include <boost/optional.hpp>
+
+#include "../ifcparse/IfcUtil.h"
+#include "../ifcparse/IfcException.h"
+#include "../ifcparse/%(schema_name)senum.h"
+
+#define IfcSchema %(schema_name)s
+
+namespace %(schema_name)s {
+
+const char* const Identifier = "%(schema_name_upper)s";
+
+// Forward definitions
+%(forward_definitions)s
+
+%(declarations)s
+
+%(class_definitions)s
+void InitStringMap();
+IfcUtil::IfcBaseClass* SchemaEntity(IfcAbstractEntity* e = 0);
+}
+
+#endif
+"""
+
+enum_header = """
+#ifndef %(schema_name_upper)sENUM_H
+#define %(schema_name_upper)sENUM_H
+
+#define IfcSchema %(schema_name)s
+
+namespace %(schema_name)s {
+
+namespace Type {
+    typedef enum {
+        %(types)s, UNDEFINED
+    } Enum;
+    Enum Parent(Enum v);
+    Enum FromString(const std::string& s);
+    std::string ToString(Enum v);
+    bool IsSimple(Enum v);
+}
+
+}
+
+#endif
+"""
+
+lb_header = """
+#ifndef %(schema_name_upper)sRT_H
+#define %(schema_name_upper)sRT_H
+
+#define IfcSchema %(schema_name)s
+
+#include "../ifcparse/IfcUtil.h"
+#include "../ifcparse/IfcEntityDescriptor.h"
+#include "../ifcparse/IfcWritableEntity.h"
+
+namespace %(schema_name)s {
+namespace Type {
+    int GetAttributeCount(Enum t);
+    int GetAttributeIndex(Enum t, const std::string& a);
+    IfcUtil::ArgumentType GetAttributeType(Enum t, unsigned char a);
+    Enum GetAttributeEntity(Enum t, unsigned char a);
+    const std::string& GetAttributeName(Enum t, unsigned char a);
+    bool GetAttributeOptional(Enum t, unsigned char a);
+    bool GetAttributeDerived(Enum t, unsigned char a);
+    std::pair<const char*, int> GetEnumerationIndex(Enum t, const std::string& a);
+    std::pair<Enum, unsigned> GetInverseAttribute(Enum t, const std::string& a);
+    std::set<std::string> GetInverseAttributeNames(Enum t);
+    void PopulateDerivedFields(IfcWrite::IfcWritableEntity* e);
+}}
+
+#endif
+"""
+
+implementation= """
+#include "../ifcparse/%(schema_name)s.h"
+#include "../ifcparse/IfcException.h"
+#include "../ifcparse/IfcWrite.h"
+#include "../ifcparse/IfcWritableEntity.h"
+
+using namespace %(schema_name)s;
+using namespace IfcParse;
+using namespace IfcWrite;
+
+IfcUtil::IfcBaseClass* %(schema_name)s::SchemaEntity(IfcAbstractEntity* e) {
+    switch(e->type()) {
+%(schema_entity_statements)s
+        default: throw IfcException("Unable to find find keyword in schema"); break;
+    }
+}
+
+std::string Type::ToString(Enum v) {
+    if (v < 0 || v >= %(max_id)d) throw IfcException("Unable to find find keyword in schema");
+    const char* names[] = { %(type_name_strings)s };
+    return names[v];
+}
+
+static std::map<std::string,Type::Enum> string_map;
+void %(schema_name)s::InitStringMap() {
+%(string_map_statements)s
+}
+
+Type::Enum Type::FromString(const std::string& s) {
+    if (string_map.empty()) InitStringMap();
+    std::map<std::string,Type::Enum>::const_iterator it = string_map.find(s);
+    if ( it == string_map.end() ) throw IfcException("Unable to find find keyword in schema");
+    else return it->second;
+}
+
+Type::Enum Type::Parent(Enum v){
+    if (v < 0 || v >= %(max_id)d) return (Enum)-1;
+%(parent_type_statements)s
+    return (Enum)-1;
+}
+
+bool Type::IsSimple(Enum v) {
+    return %(simple_type_statement)s;
+}
+
+%(enumeration_functions)s
+
+%(simple_type_impl)s
+
+%(entity_implementations)s
+"""
+
+lb_implementation = """
+#include <set>
+
+#include "../ifcparse/%(schema_name)s.h"
+#include "../ifcparse/%(schema_name)s-latebound.h"
+#include "../ifcparse/IfcException.h"
+#include "../ifcparse/IfcWrite.h"
+#include "../ifcparse/IfcWritableEntity.h"
+#include "../ifcparse/IfcUtil.h"
+#include "../ifcparse/IfcEntityDescriptor.h"
+
+using namespace %(schema_name)s;
+using namespace IfcParse;
+using namespace IfcWrite;
+using namespace IfcUtil;
+
+typedef std::map<Type::Enum,IfcEntityDescriptor*> entity_descriptor_map_t;
+typedef std::map<Type::Enum,IfcEnumerationDescriptor*> enumeration_descriptor_map_t;
+typedef std::map<Type::Enum, std::map<std::string, std::pair<Type::Enum, int> > > inverse_map_t;
+typedef std::map<Type::Enum,std::set<int> > derived_map_t;
+
+entity_descriptor_map_t entity_descriptor_map;
+enumeration_descriptor_map_t enumeration_descriptor_map;
+inverse_map_t inverse_map;
+derived_map_t derived_map;
+
+void InitDescriptorMap() {
+    IfcEntityDescriptor* current;
+%(entity_descriptors)s
+    // Enumerations
+    IfcEnumerationDescriptor* current_enum;
+    std::vector<std::string> values;
+%(enumeration_descriptors)s
+}
+
+void InitInverseMap() {
+%(inverse_implementations)s
+}
+
+void InitDerivedMap() {
+%(derived_field_statements)s
+}
+
+int Type::GetAttributeIndex(Enum t, const std::string& a) {
+    if (entity_descriptor_map.empty()) ::InitDescriptorMap();
+    std::map<Type::Enum,IfcEntityDescriptor*>::const_iterator i = entity_descriptor_map.find(t);
+    if ( i == entity_descriptor_map.end() ) throw IfcException("Type not found");
+    else return i->second->getArgumentIndex(a);
+}
+
+int Type::GetAttributeCount(Enum t) {
+    if (entity_descriptor_map.empty()) ::InitDescriptorMap();
+    std::map<Type::Enum,IfcEntityDescriptor*>::const_iterator i = entity_descriptor_map.find(t);
+    if ( i == entity_descriptor_map.end() ) throw IfcException("Type not found");
+    else return i->second->getArgumentCount();
+}
+
+ArgumentType Type::GetAttributeType(Enum t, unsigned char a) {
+    if (entity_descriptor_map.empty()) ::InitDescriptorMap();
+    std::map<Type::Enum,IfcEntityDescriptor*>::const_iterator i = entity_descriptor_map.find(t);
+    if ( i == entity_descriptor_map.end() ) throw IfcException("Type not found");
+    else return i->second->getArgumentType(a);
+}
+
+Type::Enum Type::GetAttributeEntity(Enum t, unsigned char a) {
+    if (entity_descriptor_map.empty()) ::InitDescriptorMap();
+    std::map<Type::Enum,IfcEntityDescriptor*>::const_iterator i = entity_descriptor_map.find(t);
+    if ( i == entity_descriptor_map.end() ) throw IfcException("Type not found");
+    else return i->second->getArgumentEntity(a);
+}
+
+const std::string& Type::GetAttributeName(Enum t, unsigned char a) {
+    if (entity_descriptor_map.empty()) ::InitDescriptorMap();
+    std::map<Type::Enum,IfcEntityDescriptor*>::const_iterator i = entity_descriptor_map.find(t);
+    if ( i == entity_descriptor_map.end() ) throw IfcException("Type not found");
+    else return i->second->getArgumentName(a);
+}
+
+bool Type::GetAttributeOptional(Enum t, unsigned char a) {
+    if (entity_descriptor_map.empty()) ::InitDescriptorMap();
+    std::map<Type::Enum,IfcEntityDescriptor*>::const_iterator i = entity_descriptor_map.find(t);
+    if ( i == entity_descriptor_map.end() ) throw IfcException("Type not found");
+    else return i->second->getArgumentOptional(a);
+}
+
+bool Type::GetAttributeDerived(Enum t, unsigned char a) {
+    if (derived_map.empty()) ::InitDerivedMap();
+    std::map<Type::Enum,std::set<int> >::const_iterator i = derived_map.find(t);
+    return i != derived_map.end() && i->second.find(a) != i->second.end();
+}
+
+std::pair<const char*, int> Type::GetEnumerationIndex(Enum t, const std::string& a) {
+    if (enumeration_descriptor_map.empty()) ::InitDescriptorMap();
+    std::map<Type::Enum,IfcEnumerationDescriptor*>::const_iterator i = enumeration_descriptor_map.find(t);
+    if ( i == enumeration_descriptor_map.end() ) throw IfcException("Value not found");
+    else return i->second->getIndex(a);
+}
+
+std::pair<Type::Enum, unsigned> Type::GetInverseAttribute(Enum t, const std::string& a) {
+	if (inverse_map.empty()) ::InitInverseMap();
+	inverse_map_t::const_iterator it;
+	inverse_map_t::mapped_type::const_iterator jt;
+    while (true) {
+        it = inverse_map.find(t);
+        if (it != inverse_map.end()) {
+			jt = it->second.find(a);
+			if (jt != it->second.end()) {
+				return jt->second;
+			}
+		}
+        if ((t = Parent(t)) == -1) break;
+    }
+    throw IfcException("Attribute not found");
+}
+
+std::set<std::string> Type::GetInverseAttributeNames(Enum t) {
+	if (inverse_map.empty()) ::InitInverseMap();
+	inverse_map_t::const_iterator it;
+	inverse_map_t::mapped_type::const_iterator jt;
+
+	std::set<std::string> return_value;
+
+    while (true) {
+        it = inverse_map.find(t);
+        if (it != inverse_map.end()) {
+			for (jt = it->second.begin(); jt != it->second.end(); ++jt) {
+				return_value.insert(jt->first);
+			}
+		}
+        if ((t = Parent(t)) == -1) break;
+    }
+    
+	return return_value;
+}
+
+void Type::PopulateDerivedFields(IfcWrite::IfcWritableEntity* e) {
+    std::map<Type::Enum, std::set<int> >::const_iterator i = derived_map.find(e->type());
+	if (i != derived_map.end()) {
+		for (std::set<int>::const_iterator it = i->second.begin(); it != i->second.end(); ++it) {
+			e->setArgumentDerived(*it);
+		}
+	}
+}
+"""
+
+entity_descriptor = """    current = entity_descriptor_map[Type::%(type)s] = new IfcEntityDescriptor(Type::%(type)s,%(parent_statement)s);
+%(entity_descriptor_attributes)s"""
+
+entity_descriptor_parent = "entity_descriptor_map.find(Type::%(type)s)->second"
+entity_descriptor_attribute_without_entity = '    current->add("%(name)s",%(optional)s,%(type)s);'
+entity_descriptor_attribute_with_entity = '    current->add("%(name)s",%(optional)s,%(type)s,Type::%(entity_name)s);'
+
+enumeration_descriptor = """    values.clear(); values.reserve(128);
+%(enumeration_descriptor_values)s
+    current_enum = enumeration_descriptor_map[Type::%(type)s] = new IfcEnumerationDescriptor(Type::%(type)s, values);"""
+
+enumeration_descriptor_value = '    values.push_back("%(name)s");'
+
+derived_field_statement = '    {std::set<int> idxs; %(statements)sderived_map[Type::%(type)s] = idxs;}';
+derived_field_statement_attrs = 'idxs.insert(%d); '
+
+simpletype = """%(documentation)s
+class %(name)s : public %(superclass)s {
+public:
+    virtual IfcUtil::ArgumentType getArgumentType(unsigned int i) const;
+    virtual Argument* getArgument(unsigned int i) const;
+    bool is(Type::Enum v) const;
+    Type::Enum type() const;
+    static Type::Enum Class();
+    explicit %(name)s (IfcAbstractEntity* e);
+    %(name)s (%(type)s v);
+    operator %(type)s() const;
+};
+"""
+
+simpletype_impl_comment = "// Function implementations for %(name)s"
+simpletype_impl_argument_type = "if (i == 0) { return %(attr_type)s; } else { throw IfcParse::IfcException(\"argument out of range\"); }"
+simpletype_impl_argument = "return entity->getArgument(i);"
+simpletype_impl_is_with_supertype = "return v == Type::%(class_name)s || %(superclass)s::is(v);"
+simpletype_impl_is_without_supertype = "return v == %(class_name)s::Class();"
+simpletype_impl_type = "return Type::%(class_name)s;"
+simpletype_impl_class = "return Type::%(class_name)s;"
+simpletype_impl_explicit_constructor = "entity = e;"
+simpletype_impl_constructor = "IfcWritableEntity* e = new IfcWritableEntity(Type::%(class_name)s); e->setArgument(0, v); entity = e;"
+simpletype_impl_cast = "return *entity->getArgument(0);"    
+    
+select = """%(documentation)s
+typedef IfcUtil::IfcBaseClass %(name)s;
+"""
+
+enumeration = """namespace %(name)s {
+%(documentation)s
+typedef enum {%(values)s} %(name)s;
+const char* ToString(%(name)s v);
+%(name)s FromString(const std::string& s);
+}
+"""
+
+entity = """%(documentation)s
+class %(name)s %(superclass)s{
+public:
+%(attributes)s    virtual unsigned int getArgumentCount() const { return %(argument_count)d; }
+    virtual IfcUtil::ArgumentType getArgumentType(unsigned int i) const {%(argument_type_function_body)s}
+    virtual Type::Enum getArgumentEntity(unsigned int i) const {%(argument_entity_function_body)s}
+    virtual const char* getArgumentName(unsigned int i) const {%(argument_name_function_body)s}
+    virtual Argument* getArgument(unsigned int i) const { return entity->getArgument(i); }
+%(inverse)s    bool is(Type::Enum v) const;
+    Type::Enum type() const;
+    static Type::Enum Class();
+    %(name)s (IfcAbstractEntity* e);
+    %(name)s (%(constructor_arguments)s);
+    typedef IfcTemplatedEntityList< %(name)s > list;
+};
+"""
+
+enumeration_function="""
+const char* %(name)s::ToString(%(name)s v) {
+    if ( v < 0 || v >= %(max_id)d ) throw IfcException("Unable to find find keyword in schema");
+    const char* names[] = { %(values)s };
+    return names[v];
+}
+
+%(name)s::%(name)s %(name)s::FromString(const std::string& s) {
+%(from_string_statements)s
+    throw IfcException("Unable to find find keyword in schema");
+}
+"""
+
+entity_implementation = """// Function implementations for %(name)s
+%(attributes)s%(inverse)sbool %(name)s::is(Type::Enum v) const { return v == Type::%(name)s%(parent_type_test)s; }
+Type::Enum %(name)s::type() const { return Type::%(name)s; }
+Type::Enum %(name)s::Class() { return Type::%(name)s; }
+%(name)s::%(name)s(IfcAbstractEntity* e) : %(superclass)s { if (!e) return; if (!e->is(Type::%(name)s)) throw IfcException("Unable to find find keyword in schema"); entity = e; }
+%(name)s::%(name)s(%(constructor_arguments)s) : %(superclass)s { IfcWritableEntity* e = new IfcWritableEntity(Class());%(constructor_implementation)s entity = e; EntityBuffer::Add(this); }
+"""
+
+optional_attribute_description = "/// Whether the optional attribute %s is defined for this %s"
+
+function = "%(return_type)s %(class_name)s::%(name)s(%(arguments)s) { %(body)s }"
+const_function = "%(return_type)s %(class_name)s::%(name)s(%(arguments)s) const { %(body)s }"
+constructor = "%(class_name)s::%(class_name)s(%(arguments)s) { %(body)s }"
+constructor_single_initlist = "%(class_name)s::%(class_name)s(%(arguments)s) : %(superclass)s(%(superclass_init)s) { %(body)s }"
+cast_function = "%(class_name)s::operator %(return_type)s() const { %(body)s }"
+
+array_type = "std::vector< %(instance_type)s > /*[%(lower)s:%(upper)s]*/"
+list_type = "IfcTemplatedEntityList< %(instance_type)s >::ptr"
+list_list_type = "IfcTemplatedEntityListList< %(instance_type)s >::ptr"
+untyped_list = "IfcEntityList::ptr"
+inverse_attr = "IfcTemplatedEntityList< %(entity)s >::ptr %(name)s() const; // INVERSE %(entity)s::%(attribute)s"
+
+enum_from_string_stmt = '    if (s == "%(value)s") return ::%(schema_name)s::%(name)s::%(short_name)s_%(value)s;'
+
+schema_entity_stmt = '        case Type::%(name)s: return new %(name)s(e); break;'
+schema_simple_stmt = '        case Type::%(name)s: return new IfcUtil::IfcEntitySelect(e); break;'
+string_map_statement = '    string_map["%(uppercase_name)s"%(padding)s] = Type::%(name)s;'
+parent_type_stmt = '    if(v==%(name)s%(padding)s) { return %(parent)s; }'
+
+parent_type_test = " || %s::is(v)"
+
+get_attr_stmt_generic               = "return *entity->getArgument(%(index)d);"
+get_attr_stmt_enum                  = "return %(type)s::FromString(*entity->getArgument(%(index)d));"
+get_attr_stmt_entity                = "return (%(type)s)((IfcUtil::IfcBaseClass*)(*entity->getArgument(%(index)d)));"
+get_attr_stmt_array                 = "IfcEntityList::ptr es = *entity->getArgument(%(index)d); return es->as<%(list_instance_type)s>();"
+get_attr_stmt_nested_array          = "IfcEntityListList::ptr es = *entity->getArgument(%(index)d); return es->as<%(list_instance_type)s>();"
+get_attr_stmt_optional              = "Argument* arg = entity->getArgument(%%(index)d); if (arg->isNull()) { return boost::none; } else { %s }"
+get_attr_stmt_optional_generic      = get_attr_stmt_optional % "return *arg;"
+get_attr_stmt_optional_enum         = get_attr_stmt_optional % "return %(type)s::FromString(*arg);"
+get_attr_stmt_optional_entity       = get_attr_stmt_optional % "return (%(type)s)((IfcUtil::IfcBaseClass*)(*arg));"
+get_attr_stmt_optional_array        = get_attr_stmt_optional % "IfcEntityList::ptr es = *arg; return es->as<%(list_instance_type)s>();"
+get_attr_stmt_optional_nested_array = get_attr_stmt_optional % "IfcEntityListList::ptr es = *arg; return es->as<%(list_instance_type)s>();"
+
+set_attr_stmt                  = "IfcWritableEntity* w = entity->isWritable(); if (!w) { entity = w = new IfcWritableEntity(entity); } %s;"
+set_attr_stmt_optional         = "IfcWritableEntity* w = entity->isWritable(); if (!w) { entity = w = new IfcWritableEntity(entity); } if (v) { %s; } else { w->setArgument(%%(index)d); }"
+set_attr_stmt_generic          = set_attr_stmt % "w->setArgument(%(index)d,v)"
+set_attr_stmt_enum             = set_attr_stmt % "w->setArgument(%(index)d,v,%(type)s::ToString(v));"
+set_attr_stmt_array            = set_attr_stmt % "w->setArgument(%(index)d,v->generalize());"
+set_attr_stmt_optional_generic = set_attr_stmt_optional % "w->setArgument(%(index)d,*v)"
+set_attr_stmt_optional_enum    = set_attr_stmt_optional % "w->setArgument(%(index)d,*v,%(type)s::ToString(*v));"
+set_attr_stmt_optional_array   = set_attr_stmt_optional % "w->setArgument(%(index)d,(*v)->generalize());"
+
+get_inverse = "return entity->getInverse(Type::%(type)s, %(index)d)->as<%(type)s>();"
+
+constructor_stmt = " e->setArgument(%(index)d,(%(name)s));"
+constructor_stmt_enum = " e->setArgument(%(index)d,%(name)s,%(type)s::ToString(%(name)s));"
+constructor_stmt_array = " e->setArgument(%(index)d,(%(name)s)->generalize());"
+constructor_stmt_optional = " if (%(name)s) {%(stmt)s } else { e->setArgument(%(index)d); }"
+constructor_stmt_derived = " e->setArgumentDerived(%(index)d);"
+
+inverse_implementation = "    inverse_map[Type::%(type)s].insert(std::make_pair(\"%(name)s\", std::make_pair(Type::%(related_type)s, %(index)d)));"
+
+def multi_line_comment(li):
+    return ("/// %s"%("\n/// ".join(li))) if len(li) else ""
+

src/ifcgeom/IfcGeom.h

@@ -1,4 +1,4 @@
-/********************************************************************************
+/********************************************************************************
  *                                                                              *
  * This file is part of IfcOpenShell.                                           *
  *                                                                              *
@@ -36,36 +36,79 @@
 #include <TopoDS_Face.hxx>
 #include <Geom_Curve.hxx>
 #include <gp_Pln.hxx>
+#include <TColgp_SequenceOfPnt.hxx>
 
 #include "../ifcparse/IfcParse.h"
 #include "../ifcparse/IfcUtil.h"
 
-#include "../ifcgeom/IfcShapeList.h"
+#include "../ifcgeom/IfcGeomElement.h" 
+#include "../ifcgeom/IfcGeomRepresentation.h" 
+#include "../ifcgeom/IfcRepresentationShapeItem.h"
 
-// Tolerances for various geometrical operations:
-// Specifies the deflection of the mesher
-#define DEFLECTION_TOLERANCE 0.001
-// Specifies the tolerance of the wire builder, most notably for trimmed curves
-#define WIRE_CREATION_TOLERANCE 0.0001
-// Specifies the minimal area of a face to be included in an IfcConnectedFaceset
-#define MINIMAL_FACE_AREA 0.000001
-// Specifies the treshold distance under which cartesian points are deemed equal
-#define POINT_EQUALITY_TOLERANCE 0.00001
-
-// Specifies maximum number of faces for a shell to be sewed. Sewing shells
-// that consist of many faces is really detrimental for the performance.
-#define MAX_FACES_TO_SEW 1000
+#define IN_CACHE(T,E,t,e) std::map<int,t>::const_iterator it = cache.T.find(E->entity->id());\
+if ( it != cache.T.end() ) { e = it->second; return true; }
+#define CACHE(T,E,e) cache.T[E->entity->id()] = e;
 
 namespace IfcGeom {
+
+class Cache {
+public:
+#include "IfcRegisterCreateCache.h"
+	std::map<int, SurfaceStyle> Style;
+	std::map<int, TopoDS_Shape> Shape;
+};
+
+class Kernel {
+private:
+	Cache cache;
+public:
+	// Tolerances and settings for various geometrical operations:
+	enum GeomValue {
+		// Specifies the deflection of the mesher
+		// Default: 0.001m / 1mm
+		GV_DEFLECTION_TOLERANCE, 
+		// Specifies the tolerance of the wire builder, most notably for trimmed curves
+		// Defailt: 0.0001m / 0.1mm
+		GV_WIRE_CREATION_TOLERANCE,
+		// Specifies the minimal area of a face to be included in an IfcConnectedFaceset
+		// Default: 0.000001m 0.01cm2
+		GV_MINIMAL_FACE_AREA,
+		// Specifies the treshold distance under which cartesian points are deemed equal
+		// Default: 0.00001m / 0.01mm
+		GV_POINT_EQUALITY_TOLERANCE,
+		// Specifies maximum number of faces for a shell to be sewed. Sewing shells
+		// that consist of many faces is really detrimental for the performance.
+		// Default: 1000
+		GV_MAX_FACES_TO_SEW,
+		// By default singular faces have no explicitly defined orientation, to
+		// force faces to be defined CounterClockWise, set this value greater than zero.
+		GV_FORCE_CCW_FACE_ORIENTATION,
+		// The length unit used the creation of TopoDS_Shapes, primarily affects the
+		// interpretation of IfcCartesianPoints and IfcVector magnitudes
+		// DefaultL 1.0
+		GV_LENGTH_UNIT,
+		// The plane angle unit used for the creation of TopoDS_Shapes, primarily affects
+		// the interpretation of IfcParamaterValues of IfcTrimmedCurves
+		// Default: -1.0 (= not set, fist try degrees, then radians)
+		GV_PLANEANGLE_UNIT,
+		// The precision used in boolean operations, setting this value too low results
+		// in artefacts and potentially modelling failures
+		// Default: 0.00001 (obtained from IfcGeometricRepresentationContext if available)
+		GV_PRECISION
+	};
+
 	bool convert_wire_to_face(const TopoDS_Wire& wire, TopoDS_Face& face);
-	bool convert_shapes(const IfcUtil::IfcBaseClass* L, ShapeList& result);
+	bool convert_curve_to_wire(const Handle(Geom_Curve)& curve, TopoDS_Wire& wire);
+	bool convert_shapes(const IfcUtil::IfcBaseClass* L, IfcRepresentationShapeItems& result);
 	bool is_shape_collection(const IfcUtil::IfcBaseClass* L);
-	const TopoDS_Shape* convert_shape(const IfcUtil::IfcBaseClass* L, TopoDS_Shape& result);
+	bool convert_shape(const IfcUtil::IfcBaseClass* L, TopoDS_Shape& result);
+	bool flatten_shape_list(const IfcGeom::IfcRepresentationShapeItems& shapes, TopoDS_Shape& result, bool fuse);
 	bool convert_wire(const IfcUtil::IfcBaseClass* L, TopoDS_Wire& result);
 	bool convert_curve(const IfcUtil::IfcBaseClass* L, Handle(Geom_Curve)& result);
-	bool convert_face(const IfcUtil::IfcBaseClass* L, TopoDS_Face& result);
-	bool convert_openings(const Ifc2x3::IfcProduct::ptr entity, const Ifc2x3::IfcRelVoidsElement::list& openings, const ShapeList& entity_shapes, const gp_Trsf& entity_trsf, ShapeList& cut_shapes);
-	bool convert_openings_fast(const Ifc2x3::IfcProduct::ptr entity, const Ifc2x3::IfcRelVoidsElement::list& openings, const ShapeList& entity_shapes, const gp_Trsf& entity_trsf, ShapeList& cut_shapes);
+	bool convert_face(const IfcUtil::IfcBaseClass* L, TopoDS_Shape& result);
+	bool convert_openings(const IfcSchema::IfcProduct* entity, const IfcSchema::IfcRelVoidsElement::list::ptr& openings, const IfcRepresentationShapeItems& entity_shapes, const gp_Trsf& entity_trsf, IfcRepresentationShapeItems& cut_shapes);
+	bool convert_openings_fast(const IfcSchema::IfcProduct* entity, const IfcSchema::IfcRelVoidsElement::list::ptr& openings, const IfcRepresentationShapeItems& entity_shapes, const gp_Trsf& entity_trsf, IfcRepresentationShapeItems& cut_shapes);
+	IfcSchema::IfcSurfaceStyleShading* get_surface_style(IfcSchema::IfcRepresentationItem* item);
 	bool create_solid_from_compound(const TopoDS_Shape& compound, TopoDS_Shape& solid);
 	bool is_compound(const TopoDS_Shape& shape);
 	bool is_convex(const TopoDS_Wire& wire);
@@ -73,13 +116,69 @@ namespace IfcGeom {
 	gp_Pln plane_from_face(const TopoDS_Face& face);
 	gp_Pnt point_above_plane(const gp_Pln& pln, bool agree=true);
 	const TopoDS_Shape& ensure_fit_for_subtraction(const TopoDS_Shape& shape, TopoDS_Shape& solid);
-	bool profile_helper(int numVerts, double* verts, int numFillets, int* filletIndices, double* filletRadii, gp_Trsf2d trsf, TopoDS_Face& face); 
+	bool profile_helper(int numVerts, double* verts, int numFillets, int* filletIndices, double* filletRadii, gp_Trsf2d trsf, TopoDS_Shape& face); 
 	double shape_volume(const TopoDS_Shape& s);
 	double face_area(const TopoDS_Face& f);
-	namespace Cache {
-		void Purge();
-		void PurgeShapeCache();
+	void apply_tolerance(TopoDS_Shape& s, double t);
+	void setValue(GeomValue var, double value);
+	double getValue(GeomValue var);
+	bool fill_nonmanifold_wires_with_planar_faces(TopoDS_Shape& shape);
+	void remove_redundant_points_from_loop(TColgp_SequenceOfPnt& polygon, bool closed, double tol=-1.);
+
+	std::pair<std::string, double> initializeUnits(IfcSchema::IfcUnitAssignment*);
+
+	IfcSchema::IfcObjectDefinition* get_decomposing_entity(IfcSchema::IfcProduct*);
+
+	template <typename P>
+	IfcGeom::BRepElement<P>* create_brep_for_representation_and_product(const IteratorSettings&, IfcSchema::IfcRepresentation*, IfcSchema::IfcProduct*);
+
+	const SurfaceStyle* get_style(const IfcSchema::IfcRepresentationItem* representation_item);
+	
+	template <typename T> std::pair<IfcSchema::IfcSurfaceStyle*, T*> get_surface_style(const IfcSchema::IfcRepresentationItem* representation_item) {
+		IfcSchema::IfcStyledItem::list::ptr styled_items = representation_item->StyledByItem();
+		for (IfcSchema::IfcStyledItem::list::it jt = styled_items->begin(); jt != styled_items->end(); ++jt) {
+#ifdef USE_IFC4
+			IfcUtil::IfcAbstractSelect::list::ptr style_assignments = (*jt)->Styles();
+			for (IfcUtil::IfcAbstractSelect::list::it kt = style_assignments->begin(); kt != style_assignments->end(); ++kt) {
+				if (!(*kt)->is(IfcSchema::Type::IfcPresentationStyleAssignment)) {
+					continue;
+				}
+				IfcSchema::IfcPresentationStyleAssignment* style_assignment = (IfcSchema::IfcPresentationStyleAssignment*) *kt;
+#else
+			IfcSchema::IfcPresentationStyleAssignment::list::ptr style_assignments = (*jt)->Styles();
+			for (IfcSchema::IfcPresentationStyleAssignment::list::it kt = style_assignments->begin(); kt != style_assignments->end(); ++kt) {
+				IfcSchema::IfcPresentationStyleAssignment* style_assignment = *kt;
+#endif
+				IfcEntityList::ptr styles = style_assignment->Styles();
+				for (IfcEntityList::it lt = styles->begin(); lt != styles->end(); ++lt) {
+					IfcUtil::IfcBaseClass* style = *lt;
+					if (style->is(IfcSchema::Type::IfcSurfaceStyle)) {
+						IfcSchema::IfcSurfaceStyle* surface_style = (IfcSchema::IfcSurfaceStyle*) style;
+						if (surface_style->Side() != IfcSchema::IfcSurfaceSide::IfcSurfaceSide_NEGATIVE) {
+							IfcEntityList::ptr styles_elements = surface_style->Styles();
+							for (IfcEntityList::it mt = styles_elements->begin(); mt != styles_elements->end(); ++mt) {
+								if ((*mt)->is(T::Class())) {
+									return std::make_pair(surface_style, (T*) *mt);
+								}
+							}
+						}
+					}
+				}
+			}
+
+			// StyledByItem is a SET [0:1] OF IfcStyledItem, so we
+			// break after encountering the first IfcStyledItem
+			break;
+		}
+
+		return std::make_pair<IfcSchema::IfcSurfaceStyle*, T*>(0,0);
 	}
+
 #include "IfcRegisterGeomHeader.h"
+
+};
+
+IfcSchema::IfcProductDefinitionShape* tesselate(TopoDS_Shape& shape, double deflection, IfcEntityList::ptr es);
+
 }
 #endif

src/ifcgeom/IfcGeomCurves.cpp

@@ -1,4 +1,4 @@
-/********************************************************************************
+/********************************************************************************
  *                                                                              *
  * This file is part of IfcOpenShell.                                           *
  *                                                                              *
@@ -23,6 +23,8 @@
  *                                                                              *
  ********************************************************************************/
 
+#include <algorithm>
+
 #include <gp_Pnt.hxx>
 #include <gp_Vec.hxx>
 #include <gp_Dir.hxx>
@@ -77,43 +79,60 @@
 
 #include "../ifcgeom/IfcGeom.h"
 
-bool IfcGeom::convert(const Ifc2x3::IfcCircle::ptr l, Handle(Geom_Curve)& curve) {
-	const double r = l->Radius() * Ifc::LengthUnit;
-	if ( r <= 0.0f ) { return false; }
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcCircle* l, Handle(Geom_Curve)& curve) {
+	const double r = l->Radius() * getValue(GV_LENGTH_UNIT);
+	if ( r < ALMOST_ZERO ) { 
+		Logger::Message(Logger::LOG_ERROR, "Radius not greater than zero for:", l->entity);
+		return false;
+	}
 	gp_Trsf trsf;
-	Ifc2x3::IfcAxis2Placement placement = l->Position();
-	if (placement->is(Ifc2x3::Type::IfcAxis2Placement3D)) {
-		IfcGeom::convert((Ifc2x3::IfcAxis2Placement3D*)placement,trsf);
+	IfcSchema::IfcAxis2Placement* placement = l->Position();
+	if (placement->is(IfcSchema::Type::IfcAxis2Placement3D)) {
+		IfcGeom::Kernel::convert((IfcSchema::IfcAxis2Placement3D*)placement,trsf);
 	} else {
 		gp_Trsf2d trsf2d;
-		IfcGeom::convert((IfcAxis2Placement2D*)placement,trsf2d);
+		IfcGeom::Kernel::convert((IfcSchema::IfcAxis2Placement2D*)placement,trsf2d);
 		trsf = trsf2d;
 	}
 	gp_Ax2 ax = gp_Ax2().Transformed(trsf);
 	curve = new Geom_Circle(ax, r);
 	return true;
 }
-bool IfcGeom::convert(const Ifc2x3::IfcEllipse::ptr l, Handle(Geom_Curve)& curve) {
-	double x = l->SemiAxis1() * Ifc::LengthUnit;
-	double y = l->SemiAxis2() * Ifc::LengthUnit;
-	if ( x == 0.0f || y == 0.0f || y > x ) { return false; }
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcEllipse* l, Handle(Geom_Curve)& curve) {
+	double x = l->SemiAxis1() * getValue(GV_LENGTH_UNIT);
+	double y = l->SemiAxis2() * getValue(GV_LENGTH_UNIT);
+	if (x < ALMOST_ZERO || y < ALMOST_ZERO) { 
+		Logger::Message(Logger::LOG_ERROR, "Radius not greater than zero for:", l->entity);
+		return false;
+	}
+	// Open Cascade does not allow ellipses of which the minor radius
+	// is greater than the major radius. Hence, in this case, the
+	// ellipse is rotated. Note that special care needs to be taken
+	// when creating a trimmed curve off of an ellipse like this.
+	const bool rotated = y > x;
 	gp_Trsf trsf;
-	Ifc2x3::IfcAxis2Placement placement = l->Position();
-	if (placement->is(Ifc2x3::Type::IfcAxis2Placement3D)) {
-		IfcGeom::convert((Ifc2x3::IfcAxis2Placement3D*)placement,trsf);
+	IfcSchema::IfcAxis2Placement* placement = l->Position();
+	if (placement->is(IfcSchema::Type::IfcAxis2Placement3D)) {
+		convert((IfcSchema::IfcAxis2Placement3D*)placement,trsf);
 	} else {
 		gp_Trsf2d trsf2d;
-		IfcGeom::convert((Ifc2x3::IfcAxis2Placement2D*)placement,trsf2d);
+		convert((IfcSchema::IfcAxis2Placement2D*)placement,trsf2d);
 		trsf = trsf2d;
 	}
-	gp_Ax2 ax = gp_Ax2().Transformed(trsf);
+	gp_Ax2 ax = gp_Ax2();
+	if (rotated) {
+		ax.Rotate(ax.Axis(), M_PI / 2.);
+		std::swap(x, y);
+	}
+	ax.Transform(trsf);
 	curve = new Geom_Ellipse(ax, x, y);
 	return true;
 }
-bool IfcGeom::convert(const Ifc2x3::IfcLine::ptr l, Handle(Geom_Curve)& curve) {
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcLine* l, Handle(Geom_Curve)& curve) {
 	gp_Pnt pnt;gp_Vec vec;
-	IfcGeom::convert(l->Pnt(),pnt);
-	IfcGeom::convert(l->Dir(),vec);	
+	convert(l->Pnt(),pnt);
+	convert(l->Dir(),vec);	
+	// See note at IfcGeomWires.cpp:237
 	curve = new Geom_Line(pnt,vec);
 	return true;
 }

src/ifcgeom/IfcGeomElement.h

@@ -0,0 +1,144 @@
+/********************************************************************************
+ *                                                                              *
+ * This file is part of IfcOpenShell.                                           *
+ *                                                                              *
+ * IfcOpenShell is free software: you can redistribute it and/or modify         *
+ * it under the terms of the Lesser GNU General Public License as published by  *
+ * the Free Software Foundation, either version 3.0 of the License, or          *
+ * (at your option) any later version.                                          *
+ *                                                                              *
+ * IfcOpenShell is distributed in the hope that it will be useful,              *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of               *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                 *
+ * Lesser GNU General Public License for more details.                          *
+ *                                                                              *
+ * You should have received a copy of the Lesser GNU General Public License     *
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.         *
+ *                                                                              *
+ ********************************************************************************/
+
+#ifndef IFCGEOMELEMENT_H
+#define IFCGEOMELEMENT_H
+
+#include "../ifcgeom/IfcGeomRepresentation.h"
+#include "../ifcgeom/IfcGeomIteratorSettings.h"
+
+
+namespace IfcGeom {
+
+	template <typename P>
+	class Matrix {
+	private:
+		std::vector<P> _data;
+	public:
+		Matrix(const ElementSettings& settings, const gp_Trsf& trsf) {
+			// Convert the gp_Trsf into a 4x3 Matrix
+			// Note that in case the CONVERT_BACK_UNITS setting is enabled
+			// the translation component of the matrix needs to be divided
+			// by the magnitude of the IFC model length unit because
+			// internally in IfcOpenShell everything is measured in meters.
+			for(int i = 1; i < 5; ++i) {
+				for (int j = 1; j < 4; ++j) {
+					const double trsf_value = trsf.Value(j,i);
+					const double matrix_value = i == 4 && settings.convert_back_units()
+						? trsf_value / settings.unit_magnitude()
+						: trsf_value;
+					_data.push_back(static_cast<P>(matrix_value));
+				}
+			}
+		}
+		const std::vector<P>& data() const { return _data; }
+	};
+
+	template <typename P>
+	class Transformation {
+	private:
+		gp_Trsf trsf;
+		Matrix<P> _matrix;
+	public:
+		Transformation(const ElementSettings& settings, const gp_Trsf& trsf)
+			: trsf(trsf)
+			, _matrix(settings, trsf) 
+		{}
+		const gp_Trsf& data() const { return trsf; }
+		const Matrix<P>& matrix() const { return _matrix; }
+	};
+
+	template <typename P>
+	class Element {
+	private:
+		int _id;
+		int _parent_id;
+		std::string _name;
+		std::string _type;
+		std::string _guid;
+		Transformation<P> _transformation;
+	public:
+		int id() const { return _id; }
+		int parent_id() const { return _parent_id; }
+		const std::string& name() const { return _name; }
+		const std::string& type() const { return _type; }
+		const std::string& guid() const { return _guid; }
+		const Transformation<P>& transformation() const { return _transformation; }
+		Element(const ElementSettings& settings, int id, int parent_id, const std::string& name, const std::string& type, const std::string& guid, const gp_Trsf& trsf)
+			: _id(id), _parent_id(parent_id), _name(name), _type(type), _guid(guid), _transformation(settings, trsf)
+		{}
+		virtual ~Element() {}
+	};
+
+	template <typename P>
+	class BRepElement : public Element<P> {
+	private:
+		Representation::BRep* _geometry;
+	public:
+		const Representation::BRep& geometry() const { return *_geometry; }
+		BRepElement(int id, int parent_id, const std::string& name, const std::string& type, const std::string& guid, const gp_Trsf& trsf, Representation::BRep* geometry)
+			: Element<P>(geometry->settings(),id,parent_id,name,type,guid,trsf)
+			, _geometry(geometry)
+		{}
+		virtual ~BRepElement() {
+			delete _geometry;
+		}
+	private:
+		BRepElement(const BRepElement& other);
+		BRepElement& operator=(const BRepElement& other);		
+	};
+
+	template <typename P>
+	class TriangulationElement : public Element<P> {
+	private:
+		Representation::Triangulation<P>* _geometry;
+	public:
+		const Representation::Triangulation<P>& geometry() const { return *_geometry; }
+		TriangulationElement(const BRepElement<P>& shape_model)
+			: Element<P>(shape_model)
+			, _geometry(new Representation::Triangulation<P>(shape_model.geometry()))
+		{}
+		virtual ~TriangulationElement() {
+			delete _geometry;
+		}
+	private:
+		TriangulationElement(const TriangulationElement& other);
+		TriangulationElement& operator=(const TriangulationElement& other);
+	};
+
+	template <typename P>
+	class SerializedElement : public Element<P> {
+	private:
+		Representation::Serialization* _geometry;
+	public:
+		const Representation::Serialization& geometry() const { return *_geometry; }
+		SerializedElement(const BRepElement<P>& shape_model)
+			: Element<P>(shape_model)
+			, _geometry(new Representation::Serialization(shape_model.geometry()))
+		{}
+		virtual ~SerializedElement() {
+			delete _geometry;
+		}
+	private:
+		SerializedElement(const SerializedElement& other);
+		SerializedElement& operator=(const SerializedElement& other);
+	};
+}
+
+#endif

src/ifcgeom/IfcGeomFaces.cpp

@@ -1,4 +1,4 @@
-/********************************************************************************
+/********************************************************************************
  *                                                                              *
  * This file is part of IfcOpenShell.                                           *
  *                                                                              *
@@ -50,23 +50,27 @@
 #include <Geom_Circle.hxx>
 #include <Geom_Ellipse.hxx>
 #include <Geom_TrimmedCurve.hxx>
+#include <Geom_OffsetCurve.hxx>
+
+#include <BRepPrimAPI_MakePrism.hxx>
+#include <BRepPrimAPI_MakeHalfSpace.hxx>
 
 #include <BRepOffsetAPI_Sewing.hxx>
+#include <BRepOffsetAPI_MakeOffset.hxx>
+
 #include <BRepBuilderAPI_MakeFace.hxx>
 #include <BRepBuilderAPI_MakeEdge.hxx>
 #include <BRepBuilderAPI_MakeWire.hxx>
 #include <BRepBuilderAPI_MakePolygon.hxx>
 #include <BRepBuilderAPI_MakeVertex.hxx>
+#include <BRepBuilderAPI_MakeShell.hxx>
+#include <BRepBuilderAPI_MakeSolid.hxx>
 
 #include <TopoDS.hxx>
 #include <TopoDS_Wire.hxx>
 #include <TopoDS_Face.hxx>
 #include <TopExp_Explorer.hxx>
 
-#include <BRepPrimAPI_MakePrism.hxx>
-#include <BRepBuilderAPI_MakeShell.hxx>
-#include <BRepBuilderAPI_MakeSolid.hxx>
-#include <BRepPrimAPI_MakeHalfSpace.hxx>
 #include <BRepAlgoAPI_Cut.hxx>
 
 #include <ShapeFix_Shape.hxx>
@@ -74,32 +78,48 @@
 #include <ShapeFix_Solid.hxx>
 
 #include <TopLoc_Location.hxx>
+#include <BRepGProp_Face.hxx>
+
+#include <Standard_Failure.hxx>
+
+#include <BRep_Tool.hxx>
+#include <BRepBuilderAPI_Transform.hxx>
+
+#ifdef USE_IFC4
+#include <Geom_BSplineSurface.hxx>
+#include <TColgp_Array2OfPnt.hxx>
+#include <TColStd_Array1OfReal.hxx>
+#include <TColStd_Array1OfInteger.hxx>
+
+#include <Geom_Plane.hxx>
+#include <BRepCheck_Face.hxx>
+#endif
 
 #include "../ifcgeom/IfcGeom.h"
 
-bool IfcGeom::convert(const Ifc2x3::IfcFace::ptr l, TopoDS_Face& face) {
-	Ifc2x3::IfcFaceBound::list bounds = l->Bounds();
-	Ifc2x3::IfcFaceBound::it it = bounds->begin();
-	Ifc2x3::IfcLoop::ptr loop = (*it)->Bound();
-	TopoDS_Wire wire;
-	if ( ! IfcGeom::convert_wire(loop,wire) ) return false;
-	BRepBuilderAPI_MakeFace mf (wire);
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcFace* l, TopoDS_Shape& face) {
+	IfcSchema::IfcFaceBound::list::ptr bounds = l->Bounds();
+	IfcSchema::IfcFaceBound::list::it it = bounds->begin();
+	IfcSchema::IfcLoop* loop = (*it)->Bound();
+	TopoDS_Wire outer_wire;
+	if ( ! convert_wire(loop,outer_wire) ) return false;
+	BRepBuilderAPI_MakeFace mf (outer_wire);
 	BRepBuilderAPI_FaceError er = mf.Error();
 	if ( er == BRepBuilderAPI_NotPlanar ) {
 		ShapeFix_ShapeTolerance FTol;
-		FTol.SetTolerance(wire, 0.01, TopAbs_WIRE);
+		FTol.SetTolerance(outer_wire, 0.01, TopAbs_WIRE);
 		mf.~BRepBuilderAPI_MakeFace();
-		new (&mf) BRepBuilderAPI_MakeFace(wire);
+		new (&mf) BRepBuilderAPI_MakeFace(outer_wire);
 		er = mf.Error();
 	}
 	if ( er != BRepBuilderAPI_FaceDone ) return false;
-	if ( bounds->Size() == 1 ) {
+	if ( bounds->size() == 1 ) {
 		face = mf.Face();
 	} else {
 		for( ++it; it != bounds->end(); ++ it) {
-			Ifc2x3::IfcLoop::ptr loop = (*it)->Bound();
+			IfcSchema::IfcLoop* loop = (*it)->Bound();
 			TopoDS_Wire wire;
-			if ( ! IfcGeom::convert_wire(loop,wire) ) return false;
+			if ( ! convert_wire(loop,wire) ) return false;
 			mf.Add(wire);
 		}
 		if ( mf.IsDone() ) {
@@ -116,6 +136,68 @@ bool IfcGeom::convert(const Ifc2x3::IfcFace::ptr l, TopoDS_Face& face) {
 			return false;
 		}
 	}
+
+	if ( getValue(GV_FORCE_CCW_FACE_ORIENTATION)>0 ) { 
+	// Check the orientation of the face by comparing the 
+	// normal of the topological surface to the Newell's Method's
+	// normal. Newell's Method is used for the normal calculation
+	// as a simple edge cross product can give opposite results
+	// for a concave face boundary.
+	// Reference: Graphics Gems III p. 231
+	BRepGProp_Face prop(TopoDS::Face(face));
+	gp_Vec normal_direction;
+	gp_Pnt center;
+	double u1,u2,v1,v2;
+	prop.Bounds(u1,u2,v1,v2);
+	prop.Normal((u1+u2)/2.0,(v1+v2)/2.0,center,normal_direction);						
+	gp_Dir face_normal1 = gp_Dir(normal_direction.XYZ());
+
+	double x = 0, y = 0, z = 0;
+	gp_Pnt current, previous, first;
+	int n = 0;
+	// Iterate over the vertices of the outer wire (discarding
+	// any potential holes)
+	for ( TopExp_Explorer exp(outer_wire,TopAbs_VERTEX);; exp.Next()) {
+		unsigned has_more = exp.More();
+		if ( has_more ) {
+			const TopoDS_Vertex& v = TopoDS::Vertex(exp.Current());
+			current = BRep_Tool::Pnt(v);
+		} else {
+			current = first;			
+		}
+		if ( n ) {
+			const double& xn  = previous.X();
+			const double& yn  = previous.Y();
+			const double& zn  = previous.Z();
+			const double& xn1 =  current.X();
+			const double& yn1 =  current.Y();
+			const double& zn1 =  current.Z();
+			x += (yn-yn1)*(zn+zn1);
+			y += (xn+xn1)*(zn-zn1);
+			z += (xn-xn1)*(yn+yn1);
+		} else {
+			first = current;
+		}
+		if ( !has_more ) {
+			break;
+		} 
+		previous = current;
+		++n;
+	}
+
+	// If Newell's normal does not point in the same direction
+	// as the topological face normal the face orientation is
+	// reversed
+	gp_Vec face_normal2(x,y,z);
+
+	if (face_normal2.Magnitude() > ALMOST_ZERO) {
+		if ( face_normal1.Dot(face_normal2) < 0 ) {
+			TopAbs_Orientation o = face.Orientation();
+			face.Orientation(o == TopAbs_FORWARD ? TopAbs_REVERSED : TopAbs_FORWARD);
+		}
+	}
+	}
+	
 	// It might be a good idea to globally discard faces
 	// smaller than a certain treshold value. But for now
 	// only when processing IfcConnectedFacesets the small
@@ -123,19 +205,25 @@ bool IfcGeom::convert(const Ifc2x3::IfcFace::ptr l, TopoDS_Face& face) {
 	// return face_area(face) > 0.0001;
 	return true;
 }
-bool IfcGeom::convert(const Ifc2x3::IfcArbitraryClosedProfileDef::ptr l, TopoDS_Face& face) {
+
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcArbitraryClosedProfileDef* l, TopoDS_Shape& face) {
 	TopoDS_Wire wire;
-	if ( ! IfcGeom::convert_wire(l->OuterCurve(),wire) ) return false;
-	return IfcGeom::convert_wire_to_face(wire,face);
+	if ( ! convert_wire(l->OuterCurve(),wire) ) return false;
+
+	TopoDS_Face f;
+	bool success = convert_wire_to_face(wire, f);
+	if (success) face = f;
+	return success;
 }
-bool IfcGeom::convert(const Ifc2x3::IfcArbitraryProfileDefWithVoids::ptr l, TopoDS_Face& face) {
+
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcArbitraryProfileDefWithVoids* l, TopoDS_Shape& face) {
 	TopoDS_Wire profile;
-	if ( ! IfcGeom::convert_wire(l->OuterCurve(),profile) ) return false;
+	if ( ! convert_wire(l->OuterCurve(),profile) ) return false;
 	BRepBuilderAPI_MakeFace mf(profile);
-	Ifc2x3::IfcCurve::list voids = l->InnerCurves();
-	for( Ifc2x3::IfcCurve::it it = voids->begin(); it != voids->end(); ++ it ) {
+	IfcSchema::IfcCurve::list::ptr voids = l->InnerCurves();
+	for( IfcSchema::IfcCurve::list::it it = voids->begin(); it != voids->end(); ++ it ) {
 		TopoDS_Wire hole;
-		if ( IfcGeom::convert_wire(*it,hole) ) {
+		if ( convert_wire(*it,hole) ) {
 			mf.Add(hole);
 		}
 	}
@@ -144,124 +232,432 @@ bool IfcGeom::convert(const Ifc2x3::IfcArbitraryProfileDefWithVoids::ptr l, Topo
 	face = TopoDS::Face(sfs.Shape());
 	return true;
 }
-bool IfcGeom::convert(const Ifc2x3::IfcRectangleProfileDef::ptr l, TopoDS_Face& face) {
-	const double x = l->XDim() / 2.0f * Ifc::LengthUnit;
-	const double y = l->YDim() / 2.0f  * Ifc::LengthUnit;
 
-	if ( x == 0.0f || y == 0.0f ) {
-		Ifc::LogMessage("Notice","Skipping zero sized profile:",l->entity);
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcRectangleProfileDef* l, TopoDS_Shape& face) {
+	const double x = l->XDim() / 2.0f * getValue(GV_LENGTH_UNIT);
+	const double y = l->YDim() / 2.0f  * getValue(GV_LENGTH_UNIT);
+
+	if ( x < ALMOST_ZERO || y < ALMOST_ZERO ) {
+		Logger::Message(Logger::LOG_NOTICE,"Skipping zero sized profile:",l->entity);
 		return false;
 	}
 
 	gp_Trsf2d trsf2d;
-	IfcGeom::convert(l->Position(),trsf2d);
+	IfcGeom::Kernel::convert(l->Position(),trsf2d);
 	double coords[8] = {-x,-y,x,-y,x,y,-x,y};
-	return IfcGeom::profile_helper(4,coords,0,0,0,trsf2d,face);
+	return profile_helper(4,coords,0,0,0,trsf2d,face);
 }
-bool IfcGeom::convert(const Ifc2x3::IfcIShapeProfileDef::ptr l, TopoDS_Face& face) {
-	const double x = l->OverallWidth() / 2.0f * Ifc::LengthUnit;
-	const double y = l->OverallDepth() / 2.0f * Ifc::LengthUnit;
-	const double d1 = l->WebThickness() / 2.0f  * Ifc::LengthUnit;
-	const double d2 = l->FlangeThickness() * Ifc::LengthUnit;
-	bool doFillet = l->hasFilletRadius();
-	double f;
-	if ( doFillet ) {
-		f = l->FilletRadius() * Ifc::LengthUnit;
-	}
 
-	if ( x == 0.0f || y == 0.0f || d1 == 0.0f || d2 == 0.0f ) {
-		Ifc::LogMessage("Notice","Skipping zero sized profile:",l->entity);
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcRoundedRectangleProfileDef* l, TopoDS_Shape& face) {
+	const double x = l->XDim() / 2.0f * getValue(GV_LENGTH_UNIT);
+	const double y = l->YDim() / 2.0f  * getValue(GV_LENGTH_UNIT);
+	const double r = l->RoundingRadius() * getValue(GV_LENGTH_UNIT);
+
+	if ( x < ALMOST_ZERO || y < ALMOST_ZERO || r < ALMOST_ZERO ) {
+		Logger::Message(Logger::LOG_NOTICE,"Skipping zero sized profile:",l->entity);
 		return false;
 	}
 
 	gp_Trsf2d trsf2d;
-	IfcGeom::convert(l->Position(),trsf2d);
-
-	double coords[24] = {-x,-y,x,-y,x,-y+d2,d1,-y+d2,d1,y-d2,x,y-d2,x,y,-x,y,-x,y-d2,-d1,y-d2,-d1,-y+d2,-x,-y+d2};
-	int fillets[4] = {3,4,9,10};
-	double radii[4] = {f,f,f,f};
-	return IfcGeom::profile_helper(12,coords,doFillet ? 4 : 0,fillets,radii,trsf2d,face);
+	IfcGeom::Kernel::convert(l->Position(),trsf2d);
+	double coords[8] = {-x,-y, x,-y, x,y, -x,y};
+	int fillets[4] = {0,1,2,3};
+	double radii[4] = {r,r,r,r};
+	return profile_helper(4,coords,4,fillets,radii,trsf2d,face);
 }
-bool IfcGeom::convert(const Ifc2x3::IfcCShapeProfileDef::ptr l, TopoDS_Face& face) {
-	const double x = l->Depth() / 2.0f * Ifc::LengthUnit;
-	const double y = l->Width() / 2.0f * Ifc::LengthUnit;
-	const double d1 = l->WallThickness() * Ifc::LengthUnit;
-	const double d2 = l->Girth() * Ifc::LengthUnit;
-	bool doFillet = l->hasInternalFilletRadius();
-	double f1,f2;
+
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcRectangleHollowProfileDef* l, TopoDS_Shape& face) {
+	const double x = l->XDim() / 2.0f * getValue(GV_LENGTH_UNIT);
+	const double y = l->YDim() / 2.0f  * getValue(GV_LENGTH_UNIT);
+	const double d = l->WallThickness() * getValue(GV_LENGTH_UNIT);
+
+	const bool fr1 = l->OuterFilletRadius() ? true : false;
+	const bool fr2 = l->InnerFilletRadius() ? true : false;
+
+	const double r1 = fr1 ? *l->OuterFilletRadius() * getValue(GV_LENGTH_UNIT) : 0.;
+	const double r2 = fr2 ? *l->InnerFilletRadius() * getValue(GV_LENGTH_UNIT) : 0.;
+	
+	if ( x < ALMOST_ZERO || y < ALMOST_ZERO ) {
+		Logger::Message(Logger::LOG_NOTICE,"Skipping zero sized profile:",l->entity);
+		return false;
+	}
+
+	TopoDS_Face f1;
+	TopoDS_Face f2;
+
+	gp_Trsf2d trsf2d;
+	IfcGeom::Kernel::convert(l->Position(),trsf2d);
+	double coords1[8] = {-x  ,-y,   x  ,-y,   x,  y,   -x,  y  };
+	double coords2[8] = {-x+d,-y+d, x-d,-y+d, x-d,y-d, -x+d,y-d};
+	double radii1[4] = {r1,r1,r1,r1};
+	double radii2[4] = {r2,r2,r2,r2};
+	int fillets[4] = {0,1,2,3};
+
+	bool s1 = profile_helper(4,coords1,fr1 ? 4 : 0,fillets,radii1,trsf2d,f1);
+	bool s2 = profile_helper(4,coords2,fr2 ? 4 : 0,fillets,radii2,trsf2d,f2);
+
+	if (!s1 || !s2) return false;
+
+	TopExp_Explorer exp1(f1, TopAbs_WIRE);
+	TopExp_Explorer exp2(f2, TopAbs_WIRE);
+
+	TopoDS_Wire w1 = TopoDS::Wire(exp1.Current());	
+	TopoDS_Wire w2 = TopoDS::Wire(exp2.Current());
+
+	BRepBuilderAPI_MakeFace mf(w1, false);
+	mf.Add(w2);
+
+	ShapeFix_Shape sfs(mf.Face());
+	sfs.Perform();
+	face = TopoDS::Face(sfs.Shape());	
+	return true;
+}
+
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcTrapeziumProfileDef* l, TopoDS_Shape& face) {
+	const double x1 = l->BottomXDim() / 2.0f * getValue(GV_LENGTH_UNIT);
+	const double w = l->TopXDim() * getValue(GV_LENGTH_UNIT);
+	const double dx = l->TopXOffset() * getValue(GV_LENGTH_UNIT);
+	const double y = l->YDim() / 2.0f  * getValue(GV_LENGTH_UNIT);
+
+	if ( x1 < ALMOST_ZERO || w < ALMOST_ZERO || y < ALMOST_ZERO ) {
+		Logger::Message(Logger::LOG_NOTICE,"Skipping zero sized profile:",l->entity);
+		return false;
+	}
+
+	gp_Trsf2d trsf2d;
+	IfcGeom::Kernel::convert(l->Position(),trsf2d);
+	double coords[8] = {-x1,-y, x1,-y, dx+w-x1,y, dx-x1,y};
+	return profile_helper(4,coords,0,0,0,trsf2d,face);
+}
+
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcIShapeProfileDef* l, TopoDS_Shape& face) {
+	const double x1 = l->OverallWidth() / 2.0f * getValue(GV_LENGTH_UNIT);
+	const double y = l->OverallDepth() / 2.0f * getValue(GV_LENGTH_UNIT);
+	const double d1 = l->WebThickness() / 2.0f  * getValue(GV_LENGTH_UNIT);
+	const double dy1 = l->FlangeThickness() * getValue(GV_LENGTH_UNIT);
+
+	bool doFillet1 = l->FilletRadius() ? true : false;
+	double f1 = 0.;
+	if ( doFillet1 ) {
+		f1 = *l->FilletRadius() * getValue(GV_LENGTH_UNIT);
+	}
+
+	bool doFillet2 = doFillet1;
+	double x2 = x1, dy2 = dy1, f2 = f1;
+
+	if (l->is(IfcSchema::Type::IfcAsymmetricIShapeProfileDef)) {
+		IfcSchema::IfcAsymmetricIShapeProfileDef* assym = (IfcSchema::IfcAsymmetricIShapeProfileDef*) l;
+		x2 = assym->TopFlangeWidth() / 2. * getValue(GV_LENGTH_UNIT);
+		doFillet2 = assym->TopFlangeFilletRadius() ? true : false;
+		if (doFillet2) {
+			f2 = *assym->TopFlangeFilletRadius() * getValue(GV_LENGTH_UNIT);
+		}
+		if (assym->TopFlangeThickness()) {
+			dy2 = *assym->TopFlangeThickness() * getValue(GV_LENGTH_UNIT);
+		}
+	}	
+
+	if ( x1 < ALMOST_ZERO || x2 < ALMOST_ZERO || y < ALMOST_ZERO || d1 < ALMOST_ZERO || dy1 < ALMOST_ZERO || dy2 < ALMOST_ZERO ) {
+		Logger::Message(Logger::LOG_NOTICE,"Skipping zero sized profile:",l->entity);
+		return false;
+	}
+
+	gp_Trsf2d trsf2d;
+	convert(l->Position(),trsf2d);
+
+	double coords[24] = {-x1,-y, x1,-y, x1,-y+dy1, d1,-y+dy1, d1,y-dy2, x2,y-dy2, x2,y, -x2,y, -x2,y-dy2, -d1,y-dy2, -d1,-y+dy1, -x1,-y+dy1};
+	int fillets[4] = {3,4,9,10};
+	double radii[4] = {f1,f1,f2,f2};
+	return profile_helper(12,coords,(doFillet1||doFillet2) ? 4 : 0,fillets,radii,trsf2d,face);
+}
+
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcZShapeProfileDef* l, TopoDS_Shape& face) {
+	const double x = l->FlangeWidth() * getValue(GV_LENGTH_UNIT);
+	const double y = l->Depth() / 2.0f * getValue(GV_LENGTH_UNIT);
+	const double dx = l->WebThickness() / 2.0f  * getValue(GV_LENGTH_UNIT);
+	const double dy = l->FlangeThickness() * getValue(GV_LENGTH_UNIT);
+
+	bool doFillet = l->FilletRadius() ? true : false;
+	bool doEdgeFillet = l->EdgeRadius() ? true : false;
+	
+	double f1 = 0.;
+	double f2 = 0.;
+
 	if ( doFillet ) {
-		f1 = l->InternalFilletRadius() * Ifc::LengthUnit;
+		f1 = *l->FilletRadius() * getValue(GV_LENGTH_UNIT);
+	}
+	if ( doEdgeFillet ) {
+		f2 = *l->EdgeRadius() * getValue(GV_LENGTH_UNIT);
+	}
+
+	if ( x == 0.0f || y == 0.0f || dx == 0.0f || dy == 0.0f ) {
+		Logger::Message(Logger::LOG_NOTICE,"Skipping zero sized profile:",l->entity);
+		return false;
+	}
+
+	gp_Trsf2d trsf2d;
+	IfcGeom::Kernel::convert(l->Position(),trsf2d);
+
+	double coords[16] = {-dx,-y, x,-y, x,-y+dy, dx,-y+dy, dx,y, -x,y, -x,y-dy, -dx,y-dy};
+	int fillets[4] = {2,3,6,7};
+	double radii[4] = {f2,f1,f2,f1};
+	return profile_helper(8,coords,(doFillet || doEdgeFillet) ? 4 : 0,fillets,radii,trsf2d,face);
+}
+
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcCShapeProfileDef* l, TopoDS_Shape& face) {
+	const double y = l->Depth() / 2.0f * getValue(GV_LENGTH_UNIT);
+	const double x = l->Width() / 2.0f * getValue(GV_LENGTH_UNIT);
+	const double d1 = l->WallThickness() * getValue(GV_LENGTH_UNIT);
+	const double d2 = l->Girth() * getValue(GV_LENGTH_UNIT);
+	bool doFillet = l->InternalFilletRadius() ? true : false;
+	double f1 = 0;
+	double f2 = 0;
+	if ( doFillet ) {
+		f1 = *l->InternalFilletRadius() * getValue(GV_LENGTH_UNIT);
 		f2 = f1 + d1;
 	}
 
-	if ( x == 0.0f || y == 0.0f || d1 == 0.0f || d2 == 0.0f ) {
-		Ifc::LogMessage("Notice","Skipping zero sized profile:",l->entity);
+	if ( x < ALMOST_ZERO || y < ALMOST_ZERO || d1 < ALMOST_ZERO || d2 < ALMOST_ZERO ) {
+		Logger::Message(Logger::LOG_NOTICE,"Skipping zero sized profile:",l->entity);
 		return false;
 	}
 
 	gp_Trsf2d trsf2d;
-	IfcGeom::convert(l->Position(),trsf2d);
+	IfcGeom::Kernel::convert(l->Position(),trsf2d);
 
 	double coords[24] = {-x,-y,x,-y,x,-y+d2,x-d1,-y+d2,x-d1,-y+d1,-x+d1,-y+d1,-x+d1,y-d1,x-d1,y-d1,x-d1,y-d2,x,y-d2,x,y,-x,y};
 	int fillets[8] = {0,1,4,5,6,7,10,11};
 	double radii[8] = {f2,f2,f1,f1,f1,f1,f2,f2};
-	return IfcGeom::profile_helper(12,coords,doFillet ? 8 : 0,fillets,radii,trsf2d,face);
+	return profile_helper(12,coords,doFillet ? 8 : 0,fillets,radii,trsf2d,face);
 }
-bool IfcGeom::convert(const Ifc2x3::IfcLShapeProfileDef::ptr l, TopoDS_Face& face) {
-	const double y = l->Depth() / 2.0f * Ifc::LengthUnit;
-	const double x = l->Width() / 2.0f * Ifc::LengthUnit;
-	const double d = l->Thickness() * Ifc::LengthUnit;
-	bool doEdgeFillet = l->hasEdgeRadius();
-	bool doFillet = l->hasFilletRadius();
+
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcLShapeProfileDef* l, TopoDS_Shape& face) {
+	const bool hasSlope = l->LegSlope() ? true : false;
+	const bool doEdgeFillet = l->EdgeRadius() ? true : false;
+	const bool doFillet = l->FilletRadius() ? true : false;
+
+	const double y = l->Depth() / 2.0f * getValue(GV_LENGTH_UNIT);
+	const double x = (l->Width() ? *l->Width() : l->Depth()) / 2.0f * getValue(GV_LENGTH_UNIT);
+	const double d = l->Thickness() * getValue(GV_LENGTH_UNIT);
+	const double slope = hasSlope ? (*l->LegSlope() * getValue(GV_PLANEANGLE_UNIT)) : 0.;
+	
 	double f1 = 0.0f;
 	double f2 = 0.0f;
 	if (doFillet) {
-		f1 = l->FilletRadius() * Ifc::LengthUnit;
+		f1 = *l->FilletRadius() * getValue(GV_LENGTH_UNIT);
 	}
 	if ( doEdgeFillet) {
-		f2 = l->EdgeRadius() * Ifc::LengthUnit;
+		f2 = *l->EdgeRadius() * getValue(GV_LENGTH_UNIT);
 	}
-	if ( x == 0.0f || y == 0.0f || d == 0.0f ) {
-		Ifc::LogMessage("Notice","Skipping zero sized profile:",l->entity);
+
+	if ( x < ALMOST_ZERO || y < ALMOST_ZERO || d < ALMOST_ZERO ) {
+		Logger::Message(Logger::LOG_NOTICE,"Skipping zero sized profile:",l->entity);
+		return false;
+	}
+
+	double xx = -x+d;
+	double xy = -y+d;
+	double dy1 = 0.;
+	double dy2 = 0.;
+	double dx1 = 0.;
+	double dx2 = 0.;
+	if (hasSlope) {
+		dy1 = tan(slope) * x;
+		dy2 = tan(slope) * (x - d);
+		dx1 = tan(slope) * y;
+		dx2 = tan(slope) * (y - d);
+
+		const double x1s = x; const double y1s = -y + d - dy1;
+		const double x1e = -x + d; const double y1e = -y + d + dy2;
+		const double x2s = -x + d - dx1; const double y2s = y;
+		const double x2e = -x + d + dx2; const double y2e = -y + d;
+
+		const double a1 = y1e - y1s;
+		const double b1 = x1s - x1e;
+		const double c1 = a1*x1s + b1*y1s;
+
+		const double a2 = y2e - y2s;
+		const double b2 = x2s - x2e;
+		const double c2 = a2*x2s + b2*y2s;
+
+		const double det = a1*b2 - a2*b1;
+
+		if (ALMOST_THE_SAME(det, 0.)) {
+			Logger::Message(Logger::LOG_NOTICE, "Legs do not intersect for:",l->entity);
+			return false;
+		}
+
+		xx = (b2*c1 - b1*c2) / det;
+		xy = (a1*c2 - a2*c1) / det;
+	}
+
+	gp_Trsf2d trsf2d;
+	convert(l->Position(),trsf2d);
+
+	double coords[12] = {-x,-y, x,-y, x,-y+d-dy1, xx, xy, -x+d-dx1,y, -x,y};
+	int fillets[3] = {2,3,4};
+	double radii[3] = {f2,f1,f2};
+	return profile_helper(6,coords,doFillet ? 3 : 0,fillets,radii,trsf2d,face);
+}
+
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcUShapeProfileDef* l, TopoDS_Shape& face) {
+	const bool doEdgeFillet = l->EdgeRadius() ? true : false;
+	const bool doFillet = l->FilletRadius() ? true : false;
+	const bool hasSlope = l->FlangeSlope() ? true : false;
+
+	const double y = l->Depth() / 2.0f * getValue(GV_LENGTH_UNIT);
+	const double x = l->FlangeWidth() / 2.0f * getValue(GV_LENGTH_UNIT);
+	const double d1 = l->WebThickness() * getValue(GV_LENGTH_UNIT);
+	const double d2 = l->FlangeThickness() * getValue(GV_LENGTH_UNIT);
+	const double slope = hasSlope ? (*l->FlangeSlope() * getValue(GV_PLANEANGLE_UNIT)) : 0.;
+	
+	double dy1 = 0.0f;
+	double dy2 = 0.0f;
+	double f1 = 0.0f;
+	double f2 = 0.0f;
+
+	if (doFillet) {
+		f1 = *l->FilletRadius() * getValue(GV_LENGTH_UNIT);
+	}
+	if (doEdgeFillet) {
+		f2 = *l->EdgeRadius() * getValue(GV_LENGTH_UNIT);
+	}
+
+	if (hasSlope) {
+		dy1 = (x - d1) * tan(slope);
+		dy2 = x * tan(slope);
+	}
+
+	if ( x < ALMOST_ZERO || y < ALMOST_ZERO || d1 < ALMOST_ZERO || d2 < ALMOST_ZERO ) {
+		Logger::Message(Logger::LOG_NOTICE,"Skipping zero sized profile:",l->entity);
 		return false;
 	}
 
 	gp_Trsf2d trsf2d;
-	IfcGeom::convert(l->Position(),trsf2d);
+	convert(l->Position(),trsf2d);
 
-	double coords[12] = {-x,-y,x,-y,x,-y+d,-x+d,-y+d,-x+d,y,-x,y};
-	int fillets[3] = {2,3,4};
-	double radii[3] = {f2,f1,f2};
-	return IfcGeom::profile_helper(6,coords,doFillet ? 3 : 0,fillets,radii,trsf2d,face);
+	double coords[16] = {-x,-y, x,-y, x,-y+d2-dy2, -x+d1,-y+d2+dy1, -x+d1,y-d2-dy1, x,y-d2+dy2, x,y, -x,y};
+	int fillets[4] = {2,3,4,5};
+	double radii[4] = {f2,f1,f1,f2};
+	return profile_helper(8, coords, (doFillet || doEdgeFillet) ? 4 : 0, fillets, radii, trsf2d, face);
 }
-bool IfcGeom::convert(const Ifc2x3::IfcCircleProfileDef::ptr l, TopoDS_Face& face) {
-	const double r = l->Radius() * Ifc::LengthUnit;
+
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcTShapeProfileDef* l, TopoDS_Shape& face) {
+	const bool doFlangeEdgeFillet = l->FlangeEdgeRadius() ? true : false;
+	const bool doWebEdgeFillet = l->WebEdgeRadius() ? true : false;
+	const bool doFillet = l->FilletRadius() ? true : false;
+	const bool hasFlangeSlope = l->FlangeSlope() ? true : false;
+	const bool hasWebSlope = l->WebSlope() ? true : false;
+
+	const double y = l->Depth() / 2.0f * getValue(GV_LENGTH_UNIT);
+	const double x = l->FlangeWidth() / 2.0f * getValue(GV_LENGTH_UNIT);
+	const double d1 = l->WebThickness() * getValue(GV_LENGTH_UNIT);
+	const double d2 = l->FlangeThickness() * getValue(GV_LENGTH_UNIT);
+	const double flangeSlope = hasFlangeSlope ? (*l->FlangeSlope() * getValue(GV_PLANEANGLE_UNIT)) : 0.;
+	const double webSlope = hasWebSlope ? (*l->WebSlope() * getValue(GV_PLANEANGLE_UNIT)) : 0.;
+
+	if ( x < ALMOST_ZERO || y < ALMOST_ZERO || d1 < ALMOST_ZERO || d2 < ALMOST_ZERO ) {
+		Logger::Message(Logger::LOG_NOTICE,"Skipping zero sized profile:",l->entity);
+		return false;
+	}
+	
+	double dy1 = 0.0f;
+	double dy2 = 0.0f;
+	double dx1 = 0.0f;
+	double dx2 = 0.0f;
+	double f1 = 0.0f;
+	double f2 = 0.0f;
+	double f3 = 0.0f;
+
+	if (doFillet) {
+		f1 = *l->FilletRadius() * getValue(GV_LENGTH_UNIT);
+	}
+	if (doWebEdgeFillet) {
+		f2 = *l->WebEdgeRadius() * getValue(GV_LENGTH_UNIT);
+	}
+	if (doFlangeEdgeFillet) {
+		f3 = *l->FlangeEdgeRadius() * getValue(GV_LENGTH_UNIT);
+	}
+
+	double xx, xy;
+	if (hasFlangeSlope) {
+		dy1 = (x / 2. - d1) * tan(flangeSlope);
+		dy2 = x / 2. * tan(flangeSlope);
+	}
+	if (hasWebSlope) {
+		dx1 = (y - d2) * tan(webSlope);
+		dx2 = y * tan(webSlope);
+	}
+	if (hasWebSlope || hasFlangeSlope) {
+		const double x1s = d1/2. - dx2; const double y1s = -y;
+		const double x1e = d1/2. + dx1; const double y1e = y - d2;
+		const double x2s = x; const double y2s = y - d2 + dy2;
+		const double x2e = d1/2.; const double y2e = y - d2 - dy1;
+
+		const double a1 = y1e - y1s;
+		const double b1 = x1s - x1e;
+		const double c1 = a1*x1s + b1*y1s;
+
+		const double a2 = y2e - y2s;
+		const double b2 = x2s - x2e;
+		const double c2 = a2*x2s + b2*y2s;
+
+		const double det = a1*b2 - a2*b1;
+
+		if (ALMOST_THE_SAME(det, 0.)) {
+			Logger::Message(Logger::LOG_NOTICE, "Web and flange do not intersect for:",l->entity);
+			return false;
+		}
+
+		xx = (b2*c1 - b1*c2) / det;
+		xy = (a1*c2 - a2*c1) / det;
+	} else {
+		xx = d1 / 2;
+		xy = y - d2;
+	}
+
+	gp_Trsf2d trsf2d;
+	convert(l->Position(),trsf2d);
+
+	double coords[16] = {d1/2.-dx2,-y, xx,xy, x,y-d2+dy2, x,y, -x,y, -x,y-d2+dy2, -xx,xy, -d1/2.+dx2,-y};
+	int fillets[6] = {0,1,2,5,6,7};
+	double radii[6] = {f2,f1,f3,f3,f1,f2};
+	return profile_helper(8, coords, (doFillet || doWebEdgeFillet || doFlangeEdgeFillet) ? 6 : 0, fillets, radii, trsf2d, face);
+}
+
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcCircleProfileDef* l, TopoDS_Shape& face) {
+	const double r = l->Radius() * getValue(GV_LENGTH_UNIT);
 	if ( r == 0.0f ) {
-		Ifc::LogMessage("Notice","Skipping zero sized profile:",l->entity);
+		Logger::Message(Logger::LOG_NOTICE,"Skipping zero sized profile:",l->entity);
 		return false;
 	}
 	
 	gp_Trsf2d trsf;	
-	IfcGeom::convert(l->Position(),trsf);
+	convert(l->Position(),trsf);
 
 	BRepBuilderAPI_MakeWire w;
 	gp_Ax2 ax = gp_Ax2().Transformed(trsf);
 	Handle(Geom_Circle) circle = new Geom_Circle(ax, r);
 	TopoDS_Edge edge = BRepBuilderAPI_MakeEdge(circle);
 	w.Add(edge);
-	return IfcGeom::convert_wire_to_face(w,face);
+
+	TopoDS_Face f;
+	bool success = convert_wire_to_face(w, f);
+	if (success) face = f;
+	return success;
 }
-bool IfcGeom::convert(const Ifc2x3::IfcCircleHollowProfileDef::ptr l, TopoDS_Face& face) {
-	const double r = l->Radius() * Ifc::LengthUnit;
-	const double t = l->WallThickness() * Ifc::LengthUnit;
+
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcCircleHollowProfileDef* l, TopoDS_Shape& face) {
+	const double r = l->Radius() * getValue(GV_LENGTH_UNIT);
+	const double t = l->WallThickness() * getValue(GV_LENGTH_UNIT);
 	
 	if ( r == 0.0f || t == 0.0f ) {
-		Ifc::LogMessage("Notice","Skipping zero sized profile:",l->entity);
+		Logger::Message(Logger::LOG_NOTICE,"Skipping zero sized profile:",l->entity);
 		return false;
 	}
 	
 	gp_Trsf2d trsf;	
-	IfcGeom::convert(l->Position(),trsf);
+	convert(l->Position(),trsf);
 	gp_Ax2 ax = gp_Ax2().Transformed(trsf);
 
 	BRepBuilderAPI_MakeWire outer;	
@@ -278,4 +674,220 @@ bool IfcGeom::convert(const Ifc2x3::IfcCircleHollowProfileDef::ptr l, TopoDS_Fac
 	sfs.Perform();
 	face = TopoDS::Face(sfs.Shape());	
 	return true;		
-}
+}
+
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcEllipseProfileDef* l, TopoDS_Shape& face) {
+	double rx = l->SemiAxis1() * getValue(GV_LENGTH_UNIT);
+	double ry = l->SemiAxis2() * getValue(GV_LENGTH_UNIT);
+
+	if ( rx < ALMOST_ZERO || ry < ALMOST_ZERO ) {
+		Logger::Message(Logger::LOG_NOTICE,"Skipping zero sized profile:",l->entity);
+		return false;
+	}
+
+	const bool rotated = ry > rx;
+	gp_Trsf2d trsf;	
+	convert(l->Position(),trsf);
+
+	gp_Ax2 ax = gp_Ax2();
+	if (rotated) {
+		ax.Rotate(ax.Axis(), M_PI / 2.);
+		std::swap(rx, ry);
+	}
+	ax.Transform(trsf);
+
+	BRepBuilderAPI_MakeWire w;
+	Handle(Geom_Ellipse) ellipse = new Geom_Ellipse(ax, rx, ry);
+	TopoDS_Edge edge = BRepBuilderAPI_MakeEdge(ellipse);
+	w.Add(edge);
+
+	TopoDS_Face f;
+	bool success = convert_wire_to_face(w, f);
+	if (success) face = f;
+	return success;
+}
+
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcCenterLineProfileDef* l, TopoDS_Shape& face) {
+	const double d = l->Thickness() * getValue(GV_LENGTH_UNIT) / 2.;
+
+	TopoDS_Wire wire;
+	if (!convert_wire(l->Curve(), wire)) return false;
+
+	// BRepOffsetAPI_MakeOffset insists on creating circular arc
+	// segments for joining the curves that constitute the center
+	// line. This is probably not in accordance with the IFC spec.
+	// Although it does not specify a method to join segments
+	// explicitly, it does dictate 'a constant thickness along the
+	// curve'. Therefore for simple singular wires a quick
+	// alternative is provided that uses a straight join.
+
+	TopExp_Explorer exp(wire, TopAbs_EDGE);
+	TopoDS_Edge edge = TopoDS::Edge(exp.Current());
+	exp.Next();
+
+	if (!exp.More()) {
+		double u1, u2;
+		Handle(Geom_Curve) curve = BRep_Tool::Curve(edge, u1, u2);
+
+		Handle(Geom_TrimmedCurve) trim = new Geom_TrimmedCurve(curve, u1, u2);
+
+		Handle(Geom_OffsetCurve) c1 = new Geom_OffsetCurve(trim,  d, gp::DZ());
+		Handle(Geom_OffsetCurve) c2 = new Geom_OffsetCurve(trim, -d, gp::DZ());
+
+		gp_Pnt c1a, c1b, c2a, c2b;
+		c1->D0(c1->FirstParameter(), c1a);
+		c1->D0(c1->LastParameter(), c1b);
+		c2->D0(c2->FirstParameter(), c2a);
+		c2->D0(c2->LastParameter(), c2b);
+
+		BRepBuilderAPI_MakeWire mw;
+		mw.Add(BRepBuilderAPI_MakeEdge(c1));
+		mw.Add(BRepBuilderAPI_MakeEdge(c1a, c2a));
+		mw.Add(BRepBuilderAPI_MakeEdge(c2));
+		mw.Add(BRepBuilderAPI_MakeEdge(c2b, c1b));
+		
+		face = BRepBuilderAPI_MakeFace(mw.Wire());
+	} else {
+		BRepOffsetAPI_MakeOffset offset(BRepBuilderAPI_MakeFace(gp_Pln(gp::Origin(), gp::DZ())));
+		offset.AddWire(wire);
+		offset.Perform(d);
+		face = BRepBuilderAPI_MakeFace(TopoDS::Wire(offset));
+	}
+	return true;
+}
+
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcCompositeProfileDef* l, TopoDS_Shape& face) {
+	// BRepBuilderAPI_MakeFace mf;
+
+	TopoDS_Compound compound;
+	BRep_Builder builder;
+	builder.MakeCompound(compound);
+
+	IfcSchema::IfcProfileDef::list::ptr profiles = l->Profiles();
+	bool first = true;
+	for (IfcSchema::IfcProfileDef::list::it it = profiles->begin(); it != profiles->end(); ++it) {
+		TopoDS_Face f;
+		if (convert_face(*it, f)) {
+			builder.Add(compound, f);
+			/* TopExp_Explorer exp(f, TopAbs_WIRE);
+			for (; exp.More(); exp.Next()) {
+				const TopoDS_Wire& wire = TopoDS::Wire(exp.Current());
+				if (first) {
+					mf.Init(BRepBuilderAPI_MakeFace(wire));
+				} else {
+					mf.Add(wire);
+				}
+				first = false;
+			} */
+		}
+	}
+
+	face = compound;
+	return !face.IsNull();
+}
+
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcDerivedProfileDef* l, TopoDS_Shape& face) {
+	TopoDS_Face f;
+	gp_Trsf2d trsf2d;
+	if (convert_face(l->ParentProfile(), f) && IfcGeom::Kernel::convert(l->Operator(), trsf2d)) {
+		gp_Trsf trsf = trsf2d;
+		face = TopoDS::Face(BRepBuilderAPI_Transform(f, trsf));
+		return true;
+	} else {
+		return false;
+	}
+}
+
+#ifdef USE_IFC4
+
+bool convert_surf(IfcSchema::IfcBSplineSurfaceWithKnots* l, Handle_Geom_Surface& surf) {
+	SHARED_PTR< IfcTemplatedEntityListList<IfcSchema::IfcCartesianPoint> > cps = l->ControlPointsList();
+	std::vector<double> uknots = l->UKnots();
+	std::vector<double> vknots = l->VKnots();
+	std::vector<int> umults = l->UMultiplicities();
+	std::vector<int> vmults = l->VMultiplicities();
+
+	TColgp_Array2OfPnt Poles (0, cps->size() - 1, 0, (*cps->begin()).size() - 1);
+	TColStd_Array1OfReal UKnots(0, uknots.size() - 1);
+	TColStd_Array1OfReal VKnots(0, vknots.size() - 1);
+	TColStd_Array1OfInteger UMults(0, umults.size() - 1);
+	TColStd_Array1OfInteger VMults(0, vmults.size() - 1);
+	Standard_Integer UDegree = l->UDegree();
+	Standard_Integer VDegree = l->VDegree();
+
+	int i = 0, j;
+	for (IfcTemplatedEntityListList<IfcSchema::IfcCartesianPoint>::outer_it it = cps->begin(); it != cps->end(); ++it, ++i) {
+		j = 0;
+		for (IfcTemplatedEntityListList<IfcSchema::IfcCartesianPoint>::inner_it jt = (*it).begin(); jt != (*it).end(); ++jt, ++j) {
+			IfcSchema::IfcCartesianPoint* p = *jt;
+			gp_Pnt pnt;
+			if (!convert(p, pnt)) return false;
+			Poles(i, j) = pnt;
+		}
+	}
+	i = 0;
+	for (std::vector<double>::const_iterator it = uknots.begin(); it != uknots.end(); ++it, ++i) {
+		UKnots(i) = *it;
+	}
+	i = 0;
+	for (std::vector<double>::const_iterator it = vknots.begin(); it != vknots.end(); ++it, ++i) {
+		VKnots(i) = *it;
+	}
+	i = 0;
+	for (std::vector<int>::const_iterator it = umults.begin(); it != umults.end(); ++it, ++i) {
+		UMults(i) = *it;
+	}
+	i = 0;
+	for (std::vector<int>::const_iterator it = vmults.begin(); it != vmults.end(); ++it, ++i) {
+		VMults(i) = *it;
+	}
+	surf = new Geom_BSplineSurface(Poles, UKnots, VKnots, UMults, VMults, UDegree, VDegree);
+	return true;
+}
+
+bool convert_surf(IfcSchema::IfcPlane* l, Handle_Geom_Surface& surf) {
+	gp_Pln pln;
+	convert(l, pln);
+	surf = new Geom_Plane(pln);
+	return true;
+}
+
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcAdvancedFace* l, TopoDS_Shape& face) {
+	IfcSchema::IfcSurface* s = l->FaceSurface();
+	Handle_Geom_Surface surf(0);
+	if (s->is(IfcSchema::Type::IfcBSplineSurfaceWithKnots)) {
+		convert_surf((IfcSchema::IfcBSplineSurfaceWithKnots*)s, surf);
+	} else if (s->is(IfcSchema::Type::IfcPlane)) {
+		convert_surf((IfcSchema::IfcPlane*)s, surf);
+	} else {
+		return false;
+	}
+
+	BRepBuilderAPI_MakeFace mf(surf, Precision::Confusion());
+	IfcSchema::IfcFaceBound::list::ptr bounds = l->Bounds();
+	for (IfcSchema::IfcFaceBound::list::it it = bounds->begin(); it != bounds->end(); ++it) {
+		IfcSchema::IfcLoop* loop = (*it)->Bound();
+		TopoDS_Wire outer_wire;
+		if (!convert_wire(loop, outer_wire)) return false;
+
+		TopoDS_Face temp = BRepBuilderAPI_MakeFace(surf, outer_wire);
+
+		if (BRepCheck_Face(temp).OrientationOfWires() == BRepCheck_BadOrientationOfSubshape) {
+			outer_wire.Reverse();			
+			ShapeFix_Face fix(BRepBuilderAPI_MakeFace(surf, outer_wire).Face());
+			fix.FixOrientation();
+			fix.Perform();
+			TopoDS_Face temp = fix.Face();			
+			TopExp_Explorer exp(temp, TopAbs_WIRE);
+			outer_wire = TopoDS::Wire(exp.Current());
+		}
+
+		mf.Add(outer_wire);
+	}
+
+	face = mf.Face();
+
+	return true;
+}
+
+#endif

src/ifcgeom/IfcGeomHelpers.cpp

@@ -1,4 +1,4 @@
-/********************************************************************************
+/********************************************************************************
  *                                                                              *
  * This file is part of IfcOpenShell.                                           *
  *                                                                              *
@@ -77,28 +77,19 @@
 
 #include "../ifcgeom/IfcGeom.h"
 
-
-namespace IfcGeom {
-	namespace Cache {
-#include "IfcRegisterCreateCache.h"
-	}
-}
-#define IN_CACHE(T,E,t,e) std::map<int,t>::const_iterator it = Cache::T.find(E->entity->id());\
-	if ( it != Cache::T.end() ) { e = it->second; return true; }
-#define CACHE(T,E,e) Cache::T[E->entity->id()] = e;
-
-bool IfcGeom::convert(const Ifc2x3::IfcCartesianPoint::ptr l, gp_Pnt& point) {
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcCartesianPoint* l, gp_Pnt& point) {
 	IN_CACHE(IfcCartesianPoint,l,gp_Pnt,point)
 	std::vector<double> xyz = l->Coordinates();
 	point = gp_Pnt(
-		xyz.size()     ? (xyz[0]*Ifc::LengthUnit) : 0.0f,
-		xyz.size() > 1 ? (xyz[1]*Ifc::LengthUnit) : 0.0f,
-		xyz.size() > 2 ? (xyz[2]*Ifc::LengthUnit) : 0.0f
+		xyz.size()     ? (xyz[0]*getValue(GV_LENGTH_UNIT)) : 0.0f,
+		xyz.size() > 1 ? (xyz[1]*getValue(GV_LENGTH_UNIT)) : 0.0f,
+		xyz.size() > 2 ? (xyz[2]*getValue(GV_LENGTH_UNIT)) : 0.0f
 	);
 	CACHE(IfcCartesianPoint,l,point)
 	return true;
 }
-bool IfcGeom::convert(const Ifc2x3::IfcDirection::ptr l, gp_Dir& dir) {
+
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcDirection* l, gp_Dir& dir) {
 	IN_CACHE(IfcDirection,l,gp_Dir,dir)
 	std::vector<double> xyz = l->DirectionRatios();
 	dir = gp_Dir(
@@ -109,21 +100,23 @@ bool IfcGeom::convert(const Ifc2x3::IfcDirection::ptr l, gp_Dir& dir) {
 	CACHE(IfcDirection,l,dir)
 	return true;
 }
-bool IfcGeom::convert(const Ifc2x3::IfcVector::ptr l, gp_Vec& v) {
+
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcVector* l, gp_Vec& v) {
 	IN_CACHE(IfcVector,l,gp_Vec,v)
 	gp_Dir d;
-	IfcGeom::convert(l->Orientation(),d);
-	v = l->Magnitude() * Ifc::LengthUnit * d;
+	IfcGeom::Kernel::convert(l->Orientation(),d);
+	v = l->Magnitude() * getValue(GV_LENGTH_UNIT) * d;
 	CACHE(IfcVector,l,v)
 	return true;
 }
-bool IfcGeom::convert(const Ifc2x3::IfcAxis2Placement3D::ptr l, gp_Trsf& trsf) {
+
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcAxis2Placement3D* l, gp_Trsf& trsf) {
 	IN_CACHE(IfcAxis2Placement3D,l,gp_Trsf,trsf)
 	gp_Pnt o;gp_Dir axis = gp_Dir(0,0,1);gp_Dir refDirection;
-	IfcGeom::convert(l->Location(),o);
-	bool hasRef = l->hasRefDirection();
-	if ( l->hasAxis() ) IfcGeom::convert(l->Axis(),axis);
-	if ( hasRef ) IfcGeom::convert(l->RefDirection(),refDirection);
+	IfcGeom::Kernel::convert(l->Location(),o);
+	bool hasRef = l->RefDirection() ? true : false;
+	if ( l->Axis() ) IfcGeom::Kernel::convert(*l->Axis(),axis);
+	if ( hasRef ) IfcGeom::Kernel::convert(*l->RefDirection(),refDirection);
 	gp_Ax3 ax3;
 	if ( hasRef ) ax3 = gp_Ax3(o,axis,refDirection);
 	else ax3 = gp_Ax3(o,axis);
@@ -131,57 +124,88 @@ bool IfcGeom::convert(const Ifc2x3::IfcAxis2Placement3D::ptr l, gp_Trsf& trsf) {
 	CACHE(IfcAxis2Placement3D,l,trsf)
 	return true;
 }
-bool IfcGeom::convert(const Ifc2x3::IfcCartesianTransformationOperator3D::ptr l, gp_Trsf& trsf) {
+
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcAxis1Placement* l, gp_Ax1& ax) {
+	IN_CACHE(IfcAxis1Placement,l,gp_Ax1,ax)
+	gp_Pnt o;gp_Dir axis = gp_Dir(0,0,1);
+	IfcGeom::Kernel::convert(l->Location(),o);
+	if ( l->Axis() ) IfcGeom::Kernel::convert(*l->Axis(), axis);
+	ax = gp_Ax1(o, axis);
+	CACHE(IfcAxis1Placement,l,ax)
+	return true;
+}
+
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcCartesianTransformationOperator3D* l, gp_Trsf& trsf) {
 	IN_CACHE(IfcCartesianTransformationOperator3D,l,gp_Trsf,trsf)
 	gp_Pnt origin;
-	IfcGeom::convert(l->LocalOrigin(),origin);
+	IfcGeom::Kernel::convert(l->LocalOrigin(),origin);
 	gp_Dir axis1 (1.,0.,0.);
 	gp_Dir axis2 (0.,1.,0.);
-	gp_Dir axis3;
-	if ( l->hasAxis1() ) IfcGeom::convert(l->Axis1(),axis1);
-	if ( l->hasAxis2() ) IfcGeom::convert(l->Axis2(),axis2);
-	if ( l->hasAxis3() ) IfcGeom::convert(l->Axis3(),axis3);
-	else axis3 = axis1.Crossed(axis2);
+	gp_Dir axis3 (0.,0.,1.);
+	if ( l->Axis1() ) IfcGeom::Kernel::convert(*l->Axis1(),axis1);
+	if ( l->Axis2() ) IfcGeom::Kernel::convert(*l->Axis2(),axis2);
+	if ( l->Axis3() ) IfcGeom::Kernel::convert(*l->Axis3(),axis3);
 	gp_Ax3 ax3 (origin,axis3,axis1);
 	if ( axis2.Dot(ax3.YDirection()) < 0 ) ax3.YReverse();
 	trsf.SetTransformation(ax3);
 	trsf.Invert();
-	if ( l->hasScale() ) trsf.SetScaleFactor(l->Scale());
+	if ( l->Scale() ) trsf.SetScaleFactor(*l->Scale());
 	CACHE(IfcCartesianTransformationOperator3D,l,trsf)
 	return true;
 }
-bool IfcGeom::convert(const Ifc2x3::IfcCartesianTransformationOperator2D::ptr l, gp_Trsf2d& trsf) {
+
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcCartesianTransformationOperator2D* l, gp_Trsf2d& trsf) {
 	IN_CACHE(IfcCartesianTransformationOperator2D,l,gp_Trsf2d,trsf)
+
 	gp_Pnt origin;
-	IfcGeom::convert(l->LocalOrigin(),origin);
 	gp_Dir axis1 (1.,0.,0.);
-	if ( l->hasAxis1() ) IfcGeom::convert(l->Axis1(),axis1);
-	const gp_Ax2d ax2d (gp_Pnt2d(origin.X(),origin.Y()),gp_Dir2d(axis1.X(),axis1.Y()));
+	gp_Dir axis2 (0.,1.,0.);
+	
+	IfcGeom::Kernel::convert(l->LocalOrigin(),origin);
+	if ( l->Axis1() ) IfcGeom::Kernel::convert(*l->Axis1(),axis1);
+	if ( l->Axis2() ) IfcGeom::Kernel::convert(*l->Axis2(),axis2);
+	
+	const gp_Pnt2d origin2d(origin.X(), origin.Y());
+	const gp_Dir2d axis12d(axis1.X(), axis1.Y());
+	const gp_Dir2d axis22d(axis2.X(), axis2.Y());
+
+	// A better match to represent the IfcCartesianTransformationOperator2D would
+	// be the gp_Ax22d, but to my knowledge no easy way exists to convert it into
+	// a gp_Trsf2d. Easiest would probably be to simply update the underlying
+	// gp_Mat2d directly.
+	
+	const gp_Ax2d ax2d (origin2d, axis12d);
 	trsf.SetTransformation(ax2d);
+	
+	if ( ax2d.Direction().Rotated(M_PI / 2.).Dot(axis22d) < 0. ) {
+		gp_Trsf2d mirror; mirror.SetMirror(ax2d);
+		trsf.Multiply(mirror);
+	}
+
 	trsf.Invert();
-	if ( l->hasScale() ) trsf.SetScaleFactor(l->Scale());
+	if ( l->Scale() ) trsf.SetScaleFactor(*l->Scale());
 	CACHE(IfcCartesianTransformationOperator2D,l,trsf)
 	return true;
 }
-bool IfcGeom::convert(const Ifc2x3::IfcCartesianTransformationOperator3DnonUniform::ptr l, gp_GTrsf& gtrsf) {
+
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcCartesianTransformationOperator3DnonUniform* l, gp_GTrsf& gtrsf) {
 	IN_CACHE(IfcCartesianTransformationOperator3DnonUniform,l,gp_GTrsf,gtrsf)
 	gp_Trsf trsf;
 	gp_Pnt origin;
-	IfcGeom::convert(l->LocalOrigin(),origin);
+	IfcGeom::Kernel::convert(l->LocalOrigin(),origin);
 	gp_Dir axis1 (1.,0.,0.);
 	gp_Dir axis2 (0.,1.,0.);
-	gp_Dir axis3;
-	if ( l->hasAxis1() ) IfcGeom::convert(l->Axis1(),axis1);
-	if ( l->hasAxis2() ) IfcGeom::convert(l->Axis2(),axis2);
-	if ( l->hasAxis3() ) IfcGeom::convert(l->Axis3(),axis3);
-	else axis3 = axis1.Crossed(axis2);
+	gp_Dir axis3 (0.,0.,1.);
+	if ( l->Axis1() ) IfcGeom::Kernel::convert(*l->Axis1(),axis1);
+	if ( l->Axis2() ) IfcGeom::Kernel::convert(*l->Axis2(),axis2);
+	if ( l->Axis3() ) IfcGeom::Kernel::convert(*l->Axis3(),axis3);
 	gp_Ax3 ax3 (origin,axis3,axis1);
 	if ( axis2.Dot(ax3.YDirection()) < 0 ) ax3.YReverse();
 	trsf.SetTransformation(ax3);
 	trsf.Invert();
-	const double scale1 = l->hasScale() ? l->Scale() : 1.0f;
-	const double scale2 = l->hasScale2() ? l->Scale2() : scale1;
-	const double scale3 = l->hasScale3() ? l->Scale3() : scale1;
+	const double scale1 = l->Scale() ? *l->Scale() : 1.0f;
+	const double scale2 = l->Scale2() ? *l->Scale2() : scale1;
+	const double scale3 = l->Scale3() ? *l->Scale3() : scale1;
 	gtrsf = gp_GTrsf();
 	gtrsf.SetValue(1,1,scale1);
 	gtrsf.SetValue(2,2,scale2);
@@ -190,18 +214,35 @@ bool IfcGeom::convert(const Ifc2x3::IfcCartesianTransformationOperator3DnonUnifo
 	CACHE(IfcCartesianTransformationOperator3DnonUniform,l,gtrsf)
 	return true;
 }
-bool IfcGeom::convert(const Ifc2x3::IfcCartesianTransformationOperator2DnonUniform::ptr l, gp_GTrsf2d& gtrsf) {
+
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcCartesianTransformationOperator2DnonUniform* l, gp_GTrsf2d& gtrsf) {
 	IN_CACHE(IfcCartesianTransformationOperator2DnonUniform,l,gp_GTrsf2d,gtrsf)
+
 	gp_Trsf2d trsf;
 	gp_Pnt origin;
-	IfcGeom::convert(l->LocalOrigin(),origin);
 	gp_Dir axis1 (1.,0.,0.);
-	if ( l->hasAxis1() ) IfcGeom::convert(l->Axis1(),axis1);
-	const gp_Ax2d ax2d (gp_Pnt2d(origin.X(),origin.Y()),gp_Dir2d(axis1.X(),axis1.Y()));
+	gp_Dir axis2 (0.,1.,0.);
+	
+	IfcGeom::Kernel::convert(l->LocalOrigin(),origin);
+	if ( l->Axis1() ) IfcGeom::Kernel::convert(*l->Axis1(),axis1);
+	if ( l->Axis2() ) IfcGeom::Kernel::convert(*l->Axis2(),axis2);
+
+	const gp_Pnt2d origin2d(origin.X(), origin.Y());
+	const gp_Dir2d axis12d(axis1.X(), axis1.Y());
+	const gp_Dir2d axis22d(axis2.X(), axis2.Y());
+	
+	const gp_Ax2d ax2d (origin2d, axis12d);
 	trsf.SetTransformation(ax2d);
+	
+	if ( ax2d.Direction().Rotated(M_PI / 2.).Dot(axis22d) < 0. ) {
+		gp_Trsf2d mirror; mirror.SetMirror(ax2d);
+		trsf.Multiply(mirror);
+	}
+
 	trsf.Invert();
-	const double scale1 = l->hasScale() ? l->Scale() : 1.0f;
-	const double scale2 = l->hasScale2() ? l->Scale2() : scale1;
+	
+	const double scale1 = l->Scale() ? *l->Scale() : 1.0f;
+	const double scale2 = l->Scale2() ? *l->Scale2() : scale1;
 	gtrsf = gp_GTrsf2d();
 	gtrsf.SetValue(1,1,scale1);
 	gtrsf.SetValue(2,2,scale2);
@@ -209,14 +250,15 @@ bool IfcGeom::convert(const Ifc2x3::IfcCartesianTransformationOperator2DnonUnifo
 	CACHE(IfcCartesianTransformationOperator2DnonUniform,l,gtrsf)
 	return true;
 }
-bool IfcGeom::convert(const Ifc2x3::IfcPlane::ptr pln, gp_Pln& plane) {
+
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcPlane* pln, gp_Pln& plane) {
 	IN_CACHE(IfcPlane,pln,gp_Pln,plane)
-	Ifc2x3::IfcAxis2Placement3D::ptr l = pln->Position();
+	IfcSchema::IfcAxis2Placement3D* l = pln->Position();
 	gp_Pnt o;gp_Dir axis = gp_Dir(0,0,1);gp_Dir refDirection;
-	IfcGeom::convert(l->Location(),o);
-	bool hasRef = l->hasRefDirection();
-	if ( l->hasAxis() ) IfcGeom::convert(l->Axis(),axis);
-	if ( hasRef ) IfcGeom::convert(l->RefDirection(),refDirection);
+	IfcGeom::Kernel::convert(l->Location(),o);
+	bool hasRef = l->RefDirection();
+	if ( l->Axis() ) IfcGeom::Kernel::convert(*l->Axis(),axis);
+	if ( hasRef ) IfcGeom::Kernel::convert(*l->RefDirection(),refDirection);
 	gp_Ax3 ax3;
 	if ( hasRef ) ax3 = gp_Ax3(o,axis,refDirection);
 	else ax3 = gp_Ax3(o,axis);
@@ -224,40 +266,41 @@ bool IfcGeom::convert(const Ifc2x3::IfcPlane::ptr pln, gp_Pln& plane) {
 	CACHE(IfcPlane,pln,plane)
 	return true;
 }
-bool IfcGeom::convert(const Ifc2x3::IfcAxis2Placement2D::ptr l, gp_Trsf2d& trsf) {
+
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcAxis2Placement2D* l, gp_Trsf2d& trsf) {
 	IN_CACHE(IfcAxis2Placement2D,l,gp_Trsf2d,trsf)
 	gp_Pnt P; gp_Dir V (1,0,0);
-	IfcGeom::convert(l->Location(),P);
-	if ( l->hasRefDirection() )
-		IfcGeom::convert(l->RefDirection(),V);
+	IfcGeom::Kernel::convert(l->Location(),P);
+	if ( l->RefDirection() )
+		IfcGeom::Kernel::convert(*l->RefDirection(),V);
 
 	gp_Ax2d axis(gp_Pnt2d(P.X(),P.Y()),gp_Dir2d(V.X(),V.Y()));
 	trsf.SetTransformation(axis,gp_Ax2d());
 	CACHE(IfcAxis2Placement2D,l,trsf)
 	return true;
 }
-bool IfcGeom::convert(const Ifc2x3::IfcObjectPlacement::ptr l, gp_Trsf& trsf) {
+
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcObjectPlacement* l, gp_Trsf& trsf) {
 	IN_CACHE(IfcObjectPlacement,l,gp_Trsf,trsf)
-	if ( ! l->is(Ifc2x3::Type::IfcLocalPlacement) ) return false;
-	Ifc2x3::IfcLocalPlacement::ptr current = reinterpret_pointer_cast<Ifc2x3::IfcObjectPlacement,Ifc2x3::IfcLocalPlacement>(l);
+	if ( ! l->is(IfcSchema::Type::IfcLocalPlacement) ) {
+		Logger::Message(Logger::LOG_ERROR, "Unsupported IfcObjectPlacement:", l->entity);
+		return false; 		
+	}
+	IfcSchema::IfcLocalPlacement* current = (IfcSchema::IfcLocalPlacement*)l;
 	while (1) {
 		gp_Trsf trsf2;
-		Ifc2x3::IfcAxis2Placement relplacement = current->RelativePlacement();
-		if ( relplacement->is(Ifc2x3::Type::IfcAxis2Placement3D) ) {
-			IfcGeom::convert((Ifc2x3::IfcAxis2Placement3D*)relplacement,trsf2);
+		IfcSchema::IfcAxis2Placement* relplacement = current->RelativePlacement();
+		if ( relplacement->is(IfcSchema::Type::IfcAxis2Placement3D) ) {
+			IfcGeom::Kernel::convert((IfcSchema::IfcAxis2Placement3D*)relplacement,trsf2);
 			trsf.PreMultiply(trsf2);
 		}
-		if ( current->hasPlacementRelTo() ) {
-			Ifc2x3::IfcObjectPlacement::ptr relto = current->PlacementRelTo();
-			if ( relto->is(Ifc2x3::Type::IfcLocalPlacement) )
-				current = reinterpret_pointer_cast<Ifc2x3::IfcObjectPlacement,Ifc2x3::IfcLocalPlacement>(current->PlacementRelTo());
+		if ( current->PlacementRelTo() ) {
+			IfcSchema::IfcObjectPlacement* relto = *current->PlacementRelTo();
+			if ( relto->is(IfcSchema::Type::IfcLocalPlacement) )
+				current = (IfcSchema::IfcLocalPlacement*) relto;
 			else break;			
 		} else break;
 	}
 	CACHE(IfcObjectPlacement,l,trsf)
 	return true;
-}
-void IfcGeom::Cache::Purge() {
-#include "IfcRegisterPurgeCache.h"
-	IfcGeom::Cache::PurgeShapeCache();
 }

src/ifcgeom/IfcGeomIterator.h

@@ -0,0 +1,493 @@
+/********************************************************************************
+ *                                                                              *
+ * This file is part of IfcOpenShell.                                           *
+ *                                                                              *
+ * IfcOpenShell is free software: you can redistribute it and/or modify         *
+ * it under the terms of the Lesser GNU General Public License as published by  *
+ * the Free Software Foundation, either version 3.0 of the License, or          *
+ * (at your option) any later version.                                          *
+ *                                                                              *
+ * IfcOpenShell is distributed in the hope that it will be useful,              *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of               *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                 *
+ * Lesser GNU General Public License for more details.                          *
+ *                                                                              *
+ * You should have received a copy of the Lesser GNU General Public License     *
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.         *
+ *                                                                              *
+ ********************************************************************************/
+
+/********************************************************************************
+ *                                                                              *
+ * Geometrical data in an IFC file consists of shapes (IfcShapeRepresentation)  *
+ * and instances (SUBTYPE OF IfcBuildingElement e.g. IfcWindow).                *
+ *                                                                              *
+ * IfcGeom::Representation::Triangulation is a class that represents a          *
+ * triangulated IfcShapeRepresentation.                                         *
+ *   Triangulation.verts is a 1 dimensional vector of float defining the        *
+ *      cartesian coordinates of the vertices of the triangulated shape in the  *
+ *      format of [x1,y1,z1,..,xn,yn,zn]                                        *
+ *   Triangulation.faces is a 1 dimensional vector of int containing the        *
+ *     indices of the triangles referencing positions in Triangulation.verts    *
+ *   Triangulation.edges is a 1 dimensional vector of int in {0,1} that dictates*
+ *	   the visibility of the edges that span the faces in Triangulation.faces   *
+ *                                                                              *
+ * IfcGeom::Element represents the actual IfcBuildingElements.                  *
+ *   IfcGeomObject.name is the GUID of the element                              *
+ *   IfcGeomObject.type is the datatype of the element e.g. IfcWindow           *
+ *   IfcGeomObject.mesh is a pointer to an IfcMesh                              *
+ *   IfcGeomObject.transformation.matrix is a 4x3 matrix that defines the       *
+ *     orientation and translation of the mesh in relation to the world origin  *
+ *                                                                              *
+ * IfcGeom::Iterator::findContext()                                             *
+ *   finds the most suitable representation contexts. Returns true iff          *
+ *   at least a single representation will process successfully                 *
+ *                                                                              *
+ * IfcGeom::Iterator::get()                                                     *
+ *   returns a pointer to the current IfcGeom::Element                          *
+ *                                                                              * 
+ * IfcGeom::Iterator::next()                                                    *
+ *   returns true iff a following entity is available for a successive call to  *
+ *   IfcGeom::Iterator::get()                                                   *
+ *                                                                              *
+ * IfcGeom::Iterator::progress()                                                *
+ *   returns an int in [0..100] that indicates the overall progress             *
+ *                                                                              *
+ ********************************************************************************/
+
+#ifndef IFCGEOMITERATOR_H
+#define IFCGEOMITERATOR_H
+
+#include <map>
+#include <set>
+#include <vector>
+#include <limits>
+#include <algorithm>
+
+#include <gp_Mat.hxx>
+#include <gp_Mat2d.hxx>
+#include <gp_GTrsf.hxx>
+#include <gp_GTrsf2d.hxx>
+#include <gp_Trsf.hxx>
+#include <gp_Trsf2d.hxx>
+
+#include "../ifcparse/IfcFile.h"
+
+#include "../ifcgeom/IfcGeom.h"
+#include "../ifcgeom/IfcGeomElement.h"
+#include "../ifcgeom/IfcGeomMaterial.h"
+#include "../ifcgeom/IfcGeomIteratorSettings.h"
+#include "../ifcgeom/IfcRepresentationShapeItem.h"
+
+namespace IfcGeom {
+	
+	template <typename P>
+	class Iterator {
+	private:
+		Kernel kernel;
+		IteratorSettings settings;
+
+		IfcParse::IfcFile* ifc_file;
+
+		// A container and iterator for IfcRepresentations
+		IfcSchema::IfcRepresentation::list::ptr representations;
+		IfcSchema::IfcRepresentation::list::it representation_iterator;
+
+		// The object is fetched beforehand to be sure that get() returns a valid element
+		TriangulationElement<P>* current_triangulation;
+		BRepElement<P>* current_shape_model;
+		SerializedElement<P>* current_serialization;
+		
+		// A container and iterator for IfcBuildingElements for the current IfcRepresentation referenced by *representation_iterator
+		IfcSchema::IfcProduct::list::ptr ifcproducts;
+		IfcSchema::IfcProduct::list::it ifcproduct_iterator;
+
+		int done;
+		int total;
+
+		std::string unit_name;
+		// double?
+		P unit_magnitude;
+
+		void initUnits() {
+			IfcSchema::IfcProject::list::ptr projects = ifc_file->entitiesByType<IfcSchema::IfcProject>();
+			if (projects->size() == 1) {
+				IfcSchema::IfcProject* project = *projects->begin();
+				std::pair<std::string, double> length_unit = kernel.initializeUnits(project->UnitsInContext());
+				unit_name = length_unit.first;
+				unit_magnitude = static_cast<P>(length_unit.second);
+			}
+		}
+
+		std::set<IfcSchema::Type::Enum> entities_to_include_or_exclude;
+		bool include_entities_in_processing;
+
+		void populate_set(const std::set<std::string>& include_or_ignore) {
+			entities_to_include_or_exclude.clear();
+			for (std::set<std::string>::const_iterator it = include_or_ignore.begin(); it != include_or_ignore.end(); ++it) {
+				std::string uppercase_type = *it;
+				for (std::string::iterator c = uppercase_type.begin(); c != uppercase_type.end(); ++c) {
+					*c = toupper(*c);
+				}
+				IfcSchema::Type::Enum ty;
+				try {
+					ty = IfcSchema::Type::FromString(uppercase_type);
+				} catch (const IfcParse::IfcException&) {
+					std::stringstream ss;
+					ss << "'" << *it << "' does not name a valid IFC entity";
+					throw IfcParse::IfcException(ss.str());
+				}
+				entities_to_include_or_exclude.insert(ty);
+				// TODO: Add child classes so that containment in set can be in O(log n)
+			}
+		}
+
+	public:
+		bool findContext() {
+			try {
+				initUnits();
+			} catch (...) {}
+
+			// Really this should only be 'Model', as per 
+			// the standard 'Design' is deprecated. So,
+			// just for backwards compatibility:
+			std::set<std::string> context_types;
+			context_types.insert("model");
+			context_types.insert("design");
+			// DDS likes to output 'model view'
+			context_types.insert("model view");
+
+			double lowest_precision_encountered = std::numeric_limits<double>::infinity();
+			bool any_precision_encountered = false;
+
+			representations = IfcSchema::IfcRepresentation::list::ptr(new IfcSchema::IfcRepresentation::list);
+
+			IfcSchema::IfcGeometricRepresentationContext::list::it it;
+			IfcSchema::IfcGeometricRepresentationSubContext::list::it jt;
+			IfcSchema::IfcGeometricRepresentationContext::list::ptr contexts = 
+				ifc_file->entitiesByType<IfcSchema::IfcGeometricRepresentationContext>();
+
+			IfcSchema::IfcGeometricRepresentationContext::list::ptr filtered_contexts (new IfcSchema::IfcGeometricRepresentationContext::list);
+
+ 			for (it = contexts->begin(); it != contexts->end(); ++it) {
+				IfcSchema::IfcGeometricRepresentationContext* context = *it;
+				if (context->is(IfcSchema::Type::IfcGeometricRepresentationSubContext)) {
+					// Continue, as the list of subcontexts will be considered
+					// by the parent's context inverse attributes.
+					continue;
+				}
+				if (context->ContextType()) {
+					std::string context_type_lc = *context->ContextType();
+					for (std::string::iterator c = context_type_lc.begin(); c != context_type_lc.end(); ++c) {
+						*c = tolower(*c);
+					}
+					if (context_types.find(context_type_lc) != context_types.end()) {
+						filtered_contexts->push(context);
+					}
+				}
+			}
+
+			if (filtered_contexts->size() == 0) {
+				filtered_contexts = contexts;
+			}
+
+			for (it = filtered_contexts->begin(); it != filtered_contexts->end(); ++it) {
+				IfcSchema::IfcGeometricRepresentationContext* context = *it;
+
+				representations->push(context->RepresentationsInContext());
+				if (context->Precision() && *context->Precision() < lowest_precision_encountered) {
+					lowest_precision_encountered = *context->Precision();
+					any_precision_encountered = true;
+				}
+				IfcSchema::IfcGeometricRepresentationSubContext::list::ptr sub_contexts = context->HasSubContexts();
+				for (jt = sub_contexts->begin(); jt != sub_contexts->end(); ++jt) {
+					representations->push((*jt)->RepresentationsInContext());
+				}
+				// There is no need for full recursion as the following is governed by the schema:
+				// WR31: The parent context shall not be another geometric representation sub context. 
+			}
+
+			if (any_precision_encountered) {
+				// Some arbitrary factor that has proven to work better for the models in the set of test files.
+				lowest_precision_encountered *= 10.;
+
+				lowest_precision_encountered *= unit_magnitude;
+				if (lowest_precision_encountered < 1.e-7) {
+					Logger::Message(Logger::LOG_WARNING, "Precision lower than 0.0000001 meter not enforced");
+					kernel.setValue(IfcGeom::Kernel::GV_PRECISION, 1.e-7);
+				} else {
+					kernel.setValue(IfcGeom::Kernel::GV_PRECISION, lowest_precision_encountered);
+				}
+			} else {
+				kernel.setValue(IfcGeom::Kernel::GV_PRECISION, 1.e-5);
+			}
+
+			if (representations->size() == 0) return false;
+
+			representation_iterator = representations->begin();
+			ifcproducts.reset();
+
+			if (!create()) {
+				return false;
+			}
+
+			done = 0;
+			total = representations->size();
+
+			return true;
+		}
+
+		int progress() {
+			return 100 * done / total;
+		}
+
+		const std::string& getUnitName() {
+			return unit_name;
+		}
+
+		const P getUnitMagnitude() {
+			return unit_magnitude;
+		}
+	
+		const std::string getLog() {
+			return Logger::GetLog();
+		}
+
+		IfcParse::IfcFile* getFile() {
+			return ifc_file;
+		}
+
+		void includeEntities(const std::set<std::string>& entities) {
+			populate_set(entities);
+			include_entities_in_processing = true;
+		}
+
+		void excludeEntities(const std::set<std::string>& entities) {
+			populate_set(entities);
+			include_entities_in_processing = false;
+		}
+
+	private:
+		// Move to the next IfcRepresentation
+		void _nextShape() {
+			ifcproducts.reset();
+			++ representation_iterator;
+			++ done;
+		}
+
+		BRepElement<P>* create_shape_model_for_next_entity() {
+			while ( true ) {
+				IfcSchema::IfcRepresentation* representation;
+
+				// Have we reached the end of our list of representations?
+				if ( representation_iterator == representations->end() ) {
+					representations.reset();
+					return 0;
+				}
+				representation = *representation_iterator;
+
+				// Has the list of IfcProducts for this representation been initialized?
+				if (!ifcproducts) {
+					
+					IfcSchema::IfcProductRepresentation::list::ptr prodreps = representation->OfProductRepresentation();
+					ifcproducts = IfcSchema::IfcProduct::list::ptr(new IfcSchema::IfcProduct::list);
+					IfcSchema::IfcProduct::list::ptr unfiltered_products(new IfcSchema::IfcProduct::list);
+
+					for ( IfcSchema::IfcProductRepresentation::list::it it = prodreps->begin(); it != prodreps->end(); ++it ) {
+						if ( (*it)->is(IfcSchema::Type::IfcProductDefinitionShape) ) {
+							IfcSchema::IfcProductDefinitionShape* pds = (IfcSchema::IfcProductDefinitionShape*)*it;
+							unfiltered_products->push(pds->ShapeOfProduct());
+						} else {
+							// http://buildingsmart-tech.org/ifc/IFC2x3/TC1/html/ifcrepresentationresource/lexical/ifcproductrepresentation.htm
+							// IFC2x Edition 3 NOTE  Users should not instantiate the entity IfcProductRepresentation from IFC2x Edition 3 onwards. 
+							// It will be changed into an ABSTRACT supertype in future releases of IFC.
+
+							// IfcProductRepresentation also lacks the INVERSE relation to IfcProduct
+							// Let's find the IfcProducts that reference the IfcProductRepresentation anyway
+							unfiltered_products->push((*it)->entity->getInverse(IfcSchema::Type::IfcProduct, -1)->as<IfcSchema::IfcProduct>());
+						}
+
+						// Filter the products based on the set of entities being included or excluded for
+						// processing. The set is iterated over te able to filter on subtypes.
+						for ( IfcSchema::IfcProduct::list::it it = unfiltered_products->begin(); it != unfiltered_products->end(); ++it ) {
+							bool found = false;
+							for (std::set<IfcSchema::Type::Enum>::const_iterator jt = entities_to_include_or_exclude.begin(); jt != entities_to_include_or_exclude.end(); ++jt) {
+								if ((*it)->is(*jt)) {
+									found = true;
+									break;
+								}
+							}
+							if (found == include_entities_in_processing) {
+								ifcproducts->push(*it);
+							}
+						}
+
+					}
+					// Does this representation have any IfcProducts?
+					if (!ifcproducts->size()) {
+						_nextShape();
+						continue;
+					}
+					ifcproduct_iterator = ifcproducts->begin();
+				}
+				// Have we reached the end of our list of IfcProducts?
+				if ( ifcproduct_iterator == ifcproducts->end() ) {
+					_nextShape();
+					continue;
+				}
+
+				IfcSchema::IfcProduct* product = *ifcproduct_iterator;
+
+				BRepElement<P>* element = kernel.create_brep_for_representation_and_product<P>(settings, representation, product);
+
+				if ( !element ) {
+					_nextShape();
+					continue;
+				}
+
+				return element;
+			}	
+		}
+
+		public:
+
+		bool next() {
+			// Free all possible representations of the current geometrical entity
+			delete current_triangulation;
+			current_triangulation = 0;
+			delete current_serialization;
+			current_serialization = 0;
+			delete current_shape_model;
+			current_shape_model = 0;
+			
+			// Increment the iterator over the list of products using the current
+			// shape representation
+			if (ifcproducts) {
+				++ifcproduct_iterator;
+			}
+
+			return create();
+		}
+
+		Element<P>* get() {
+			// TODO: Test settings and throw
+			if (current_triangulation) return current_triangulation;
+			else if (current_serialization) return current_serialization;
+			else if (current_shape_model) return current_shape_model;
+			else return 0;
+		}
+
+		const Element<P>* getObject(int id) {
+
+			gp_Trsf trsf;
+			int parent_id = -1;
+			std::string instance_type, product_name, product_guid;
+			
+			try {
+				const IfcUtil::IfcBaseClass* ifc_entity = ifc_file->entityById(id);
+				instance_type = IfcSchema::Type::ToString(ifc_entity->type());
+				if ( ifc_entity->is(IfcSchema::Type::IfcProduct) ) {
+					IfcSchema::IfcProduct* ifc_product = (IfcSchema::IfcProduct*)ifc_entity;
+					
+					product_guid = ifc_product->GlobalId();
+					product_name = ifc_product->hasName() ? ifc_product->Name() : "";
+					
+					parent_id = -1;
+					try {
+						IfcSchema::IfcObjectDefinition* parent_object = kernel.get_decomposing_entity(ifc_product);
+						if (parent_object) {
+							parent_id = parent_object->entity->id();
+						}
+					} catch (...) {}
+					
+					try {
+						kernel.convert(ifc_product->ObjectPlacement(), trsf);
+					} catch (...) {}
+				}
+			} catch(...) {}
+
+			ElementSettings element_settings(settings, unit_magnitude, instance_type);
+			Element<P>* ifc_object = new Element<P>(element_settings, id, parent_id, product_name, instance_type, product_guid, trsf);
+			
+			return ifc_object;
+		}
+
+		bool create() {
+			try {
+				current_shape_model = create_shape_model_for_next_entity();
+			} catch (...) {}
+			if (!current_shape_model) return false;
+			if (settings.use_brep_data()) {
+				try {
+					current_serialization = new SerializedElement<P>(*current_shape_model);
+				} catch (...) {}
+				return !!current_serialization;
+			} else if (!settings.disable_triangulation()) {
+				try {
+					current_triangulation = new TriangulationElement<P>(*current_shape_model);
+				} catch (...) {}
+				return !!current_triangulation;
+			} else {
+				return true;
+			}
+		}
+	private:
+		void initialize() {
+			current_triangulation = 0;
+			current_shape_model = 0;
+			current_serialization = 0;
+
+			// Upon initialisation, the (empty) set of entity names,
+			// should be excluded, or no products would be processed.
+			include_entities_in_processing = false;
+		
+			unit_name = "METER";
+			unit_magnitude = 1.f;
+
+			kernel.setValue(IfcGeom::Kernel::GV_MAX_FACES_TO_SEW, settings.sew_shells() ? 1000 : -1);
+			kernel.setValue(IfcGeom::Kernel::GV_FORCE_CCW_FACE_ORIENTATION, settings.force_ccw_face_orientation() ? 1 : -1);
+		}
+	public:
+		Iterator(const IteratorSettings& settings, IfcParse::IfcFile* file)
+			: settings(settings)
+			, ifc_file(file)
+		{
+			initialize();
+		}
+		Iterator(const IteratorSettings& settings, const std::string& filename)
+			: settings(settings)
+			, ifc_file(new IfcParse::IfcFile)
+		{
+			ifc_file->Init(filename);
+			initialize();
+		}
+		Iterator(const IteratorSettings& settings, void* data, int length)
+			: settings(settings)
+			, ifc_file(new IfcParse::IfcFile)
+		{
+			ifc_file->Init(data, length);
+			initialize();
+		}
+		Iterator(const IteratorSettings& settings, std::istream& filestream, int length)
+			: settings(settings)
+			, ifc_file(new IfcParse::IfcFile)
+		{
+			ifc_file->Init(filestream, length);
+			initialize();
+		}
+
+		~Iterator() {
+			// TODO: Correctly implement destructor for IfcFile
+			delete ifc_file;
+
+			delete current_triangulation;
+			current_triangulation = 0;
+			delete current_serialization;
+			current_serialization = 0;
+			delete current_shape_model;
+			current_shape_model = 0;
+		}
+	};
+}
+
+#endif

src/ifcgeom/IfcGeomIteratorSettings.h

@@ -0,0 +1,172 @@
+/********************************************************************************
+ *                                                                              *
+ * This file is part of IfcOpenShell.                                           *
+ *                                                                              *
+ * IfcOpenShell is free software: you can redistribute it and/or modify         *
+ * it under the terms of the Lesser GNU General Public License as published by  *
+ * the Free Software Foundation, either version 3.0 of the License, or          *
+ * (at your option) any later version.                                          *
+ *                                                                              *
+ * IfcOpenShell is distributed in the hope that it will be useful,              *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of               *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                 *
+ * Lesser GNU General Public License for more details.                          *
+ *                                                                              *
+ * You should have received a copy of the Lesser GNU General Public License     *
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.         *
+ *                                                                              *
+ ********************************************************************************/
+
+#ifndef IFCGEOMITERATORSETTINGS_H
+#define IFCGEOMITERATORSETTINGS_H
+
+#include <string>
+
+#include "../ifcparse/IfcException.h"
+
+namespace IfcGeom {
+
+	class IteratorSettings {
+	public:
+		// Enumeration of setting identifiers. These settings define the
+		// behaviour of various aspects of IfcOpenShell.
+
+		// Specifies whether vertices are welded, meaning that the coordinates
+		// vector will only contain unique xyz-triplets. This results in a 
+		// manifold mesh which is useful for modelling applications, but might 
+		// result in unwanted shading artifacts in rendering applications.
+		static const int WELD_VERTICES = 1;
+		// Specifies whether to apply the local placements of building elements
+		// directly to the coordinates of the representation mesh rather than
+		// to represent the local placement in the 4x3 matrix, which will in that
+		// case be the identity matrix.
+		static const int USE_WORLD_COORDS = 2;
+		// Internally IfcOpenShell measures everything in meters. This settings
+		// specifies whether to convert IfcGeomObjects back to the units in which
+		// the geometry in the IFC file is specified.
+		static const int CONVERT_BACK_UNITS = 3;
+		// Specifies whether to use the Open Cascade BREP format for representation
+		// items rather than to create triangle meshes. This is useful is IfcOpenShell
+		// is used as a library in an application that is also built on Open Cascade.
+		static const int USE_BREP_DATA = 4;
+		// Specifies whether to sew IfcConnectedFaceSets (open and closed shells) to
+		// TopoDS_Shells or whether to keep them as a loose collection of faces.
+		static const int SEW_SHELLS = 5;
+		// Specifies whether to compose IfcOpeningElements into a single compound
+		// in order to speed up the processing of opening subtractions.
+		static const int FASTER_BOOLEANS = 6;
+		// By default singular faces have no explicitly defined orientation, to
+		// force faces to be defined CounterClockWise set this to true.
+		static const int FORCE_CCW_FACE_ORIENTATION = 7;
+		// Disables the subtraction of IfcOpeningElement representations from
+		// the related building element representations.
+		static const int DISABLE_OPENING_SUBTRACTIONS = 8;
+		// Disables the triangulation of the topological representations. Useful if
+		// the client application understands Open Cascade's native format.
+		static const int DISABLE_TRIANGULATION = 9;
+		// Applies default materials to entity instances without a surface style.
+		static const int APPLY_DEFAULT_MATERIALS = 10;
+
+		// End of settings enumeration.
+
+	private:
+		bool _weld_vertices, _use_world_coords, _convert_back_units, _use_brep_data, _sew_shells, _faster_booleans, _force_ccw_face_orientation, _disable_opening_subtractions, _disable_triangulation, _apply_default_materials;
+		double _deflection_tolerance;
+	public:
+		IteratorSettings()
+			: _weld_vertices(true)
+			, _use_world_coords(false)
+			, _convert_back_units(false)
+			, _use_brep_data(false)
+			, _sew_shells(false)
+			, _faster_booleans(false)
+			, _force_ccw_face_orientation(false)
+			, _disable_opening_subtractions(false)
+			, _disable_triangulation(false)
+			, _apply_default_materials(false)
+			// TODO: Make deflection tolerance into a command line argument
+			// For now, stick to one millimeter. Note that this is independent of the IFC length unit.
+			, _deflection_tolerance(1.e-3)
+		{}
+
+		const bool& weld_vertices() const { return _weld_vertices; }
+		bool& weld_vertices() { return _weld_vertices; }
+		const bool& use_world_coords() const { return _use_world_coords; }
+		bool& use_world_coords() { return _use_world_coords; }
+		const bool& convert_back_units() const { return _convert_back_units; }
+		bool& convert_back_units() { return _convert_back_units; }
+		const bool& use_brep_data() const { return _use_brep_data; }
+		bool& use_brep_data() { return _use_brep_data; }
+		const bool& sew_shells() const { return _sew_shells; }
+		bool& sew_shells() { return _sew_shells; }
+		const bool& faster_booleans() const { return _faster_booleans; }
+		bool& faster_booleans() { return _faster_booleans; }
+		const bool& force_ccw_face_orientation() const { return _force_ccw_face_orientation; }
+		bool& force_ccw_face_orientation() { return _force_ccw_face_orientation; }
+		const bool& disable_opening_subtractions() const { return _disable_opening_subtractions; }
+		bool& disable_opening_subtractions() { return _disable_opening_subtractions; }
+		const bool& disable_triangulation() const { return _disable_triangulation; }
+		bool& disable_triangulation() { return _disable_triangulation; }
+		const bool& apply_default_materials() const { return _apply_default_materials; }
+		bool& apply_default_materials() { return _apply_default_materials; }
+		
+		const double& deflection_tolerance() const { return _deflection_tolerance; }
+		double& deflection_tolerance() { return _deflection_tolerance; }
+		
+		void set(int setting, bool value) {
+			switch (setting) {
+			case USE_WORLD_COORDS:
+				_use_world_coords = value;
+				break;
+			case WELD_VERTICES:
+				_weld_vertices = value;
+				break;
+			case CONVERT_BACK_UNITS:
+				_convert_back_units = value;
+				break;
+			case USE_BREP_DATA:
+				_use_brep_data = value;
+				break;
+			case FASTER_BOOLEANS:
+				_faster_booleans = value;
+				break;
+			case SEW_SHELLS:
+				_sew_shells = value;
+				break;
+			case FORCE_CCW_FACE_ORIENTATION:
+				_force_ccw_face_orientation = value;
+				break;
+			case DISABLE_OPENING_SUBTRACTIONS:
+				_disable_opening_subtractions = value;
+				break;
+			case DISABLE_TRIANGULATION:
+				_disable_triangulation = value;
+				break;
+			case APPLY_DEFAULT_MATERIALS:
+				_apply_default_materials = value;
+				break;
+			default: throw IfcParse::IfcException("Invalid IteratorSetting");
+			}
+		}
+	};
+	
+	class ElementSettings : public IteratorSettings {
+	private:
+		double _unit_magnitude;
+		std::string _element_type;
+	public:
+		ElementSettings(const IteratorSettings& settings,
+			double unit_magnitude,
+			const std::string& element_type)
+			: IteratorSettings(settings)
+			, _unit_magnitude(unit_magnitude)
+			, _element_type(element_type)
+		{}
+
+		const double& unit_magnitude() const { return _unit_magnitude; }
+		const std::string& element_type() const { return _element_type; }
+	};
+
+}
+
+#endif

src/ifcgeom/IfcGeomMaterial.cpp

@@ -0,0 +1,34 @@
+/********************************************************************************
+ *                                                                              *
+ * This file is part of IfcOpenShell.                                           *
+ *                                                                              *
+ * IfcOpenShell is free software: you can redistribute it and/or modify         *
+ * it under the terms of the Lesser GNU General Public License as published by  *
+ * the Free Software Foundation, either version 3.0 of the License, or          *
+ * (at your option) any later version.                                          *
+ *                                                                              *
+ * IfcOpenShell is distributed in the hope that it will be useful,              *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of               *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                 *
+ * Lesser GNU General Public License for more details.                          *
+ *                                                                              *
+ * You should have received a copy of the Lesser GNU General Public License     *
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.         *
+ *                                                                              *
+ ********************************************************************************/
+
+#include "IfcGeomMaterial.h"
+
+static double black[3] = {0.,0.,0.};
+
+IfcGeom::Material::Material(const IfcGeom::SurfaceStyle* style) : style(style) {}
+bool IfcGeom::Material::hasDiffuse() const { return style->Diffuse() ? true : false; }
+bool IfcGeom::Material::hasSpecular() const { return style->Specular() ? true : false; }
+bool IfcGeom::Material::hasTransparency() const { return style->Transparency() ? true : false; }
+bool IfcGeom::Material::hasSpecularity() const { return style->Specularity() ? true : false; }
+const double* IfcGeom::Material::diffuse() const { if (hasDiffuse()) return &((*style->Diffuse()).R()); else return black; }
+const double* IfcGeom::Material::specular() const { if (hasSpecular()) return &((*style->Specular()).R()); else return black; }
+double IfcGeom::Material::transparency() const { if (hasTransparency()) return *style->Transparency(); else return 0; }
+double IfcGeom::Material::specularity() const { if (hasSpecularity()) return *style->Specularity(); else return 0; }
+const std::string IfcGeom::Material::name() const { return style->Name(); }
+bool IfcGeom::Material::operator==(const IfcGeom::Material& other) const { return style == other.style; }

src/ifcgeom/IfcGeomMaterial.h

@@ -17,64 +17,34 @@
  *                                                                              *
  ********************************************************************************/
 
-namespace IfcGeomObjects {
+#ifndef IFCGEOMMATERIAL_H
+#define IFCGEOMMATERIAL_H
 
-	const int WELD_VERTICES = 1;
-	const int USE_WORLD_COORDS = 2;
-	const int CONVERT_BACK_UNITS = 3;
-	const int USE_BREP_DATA = 4;
-	const int SEW_SHELLS = 5;
+#include <string>
 
-	class IfcMesh {
+#include "../ifcgeom/IfcGeomRenderStyles.h"
+
+namespace IfcGeom {	
+
+	class Material {
+	private:
+		const IfcGeom::SurfaceStyle* style;
 	public:
-		int id;
-		std::vector<float> verts;
-		std::vector<int> faces;
-		std::vector<int> edges;
-		std::vector<float> normals;
-		std::string brep_data;
+		explicit Material(const IfcGeom::SurfaceStyle* style = 0); // TODO default constructor for vector?
+		// Material(const Material& other);
+		// Material& operator=(const Material& other);
+		bool hasDiffuse() const;
+		bool hasSpecular() const;
+		bool hasTransparency() const;
+		bool hasSpecularity() const;
+		const double* diffuse() const;
+		const double* specular() const;
+		double transparency() const;
+		double specularity() const;
+		const std::string name() const;
+		bool operator==(const Material& other) const;
 	};
 
-	class IfcObject {
-	public:
-		int id;
-		int parent_id;
-		std::string name;
-		std::string type;
-		std::string guid;
-		std::vector<float> matrix;
-		const std::vector<int> name_as_intvector() {
-			std::vector<int> r;
-			for ( std::string::const_iterator it = name.begin(); it != name.end(); ++ it ) r.push_back(*it);
-			return r;
-		}
-		const std::vector<int> type_as_intvector() {
-			std::vector<int> r;
-			for ( std::string::const_iterator it = type.begin(); it != type.end(); ++ it ) r.push_back(*it);
-			return r;
-		}
-		const std::vector<int> guid_as_intvector() {
-			std::vector<int> r;
-			for ( std::string::const_iterator it = guid.begin(); it != guid.end(); ++ it ) r.push_back(*it);
-			return r;
-		}
-	};
+}
 
-	class IfcGeomObject : public IfcObject {
-	public:
-		IfcMesh* mesh;
-	};
-
-	bool Next();
-	const IfcGeomObject* Get();
-	bool Init(const std::string fn);
-	bool InitUCS2(const char* fn) {
-        return Init(std::string(fn+1));
-    }
-	void Settings(int setting, bool value);
-	int Progress();
-	const IfcObject* GetObject(int id);
-	bool CleanUp();
-	std::string GetLog();
-
-};
+#endif

src/ifcgeom/IfcGeomObjects.cpp

@@ -1,550 +0,0 @@
-/********************************************************************************
- *                                                                              *
- * This file is part of IfcOpenShell.                                           *
- *                                                                              *
- * IfcOpenShell is free software: you can redistribute it and/or modify         *
- * it under the terms of the Lesser GNU General Public License as published by  *
- * the Free Software Foundation, either version 3.0 of the License, or          *
- * (at your option) any later version.                                          *
- *                                                                              *
- * IfcOpenShell is distributed in the hope that it will be useful,              *
- * but WITHOUT ANY WARRANTY; without even the implied warranty of               *
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                 *
- * Lesser GNU General Public License for more details.                          *
- *                                                                              *
- * You should have received a copy of the Lesser GNU General Public License     *
- * along with this program. If not, see <http://www.gnu.org/licenses/>.         *
- *                                                                              *
- ********************************************************************************/
-
-#include <map>
-
-#include <gp_Mat.hxx>
-#include <gp_Mat2d.hxx>
-#include <gp_GTrsf.hxx>
-#include <gp_GTrsf2d.hxx>
-#include <gp_Trsf.hxx>
-#include <gp_Trsf2d.hxx>
-#include <TopoDS_Compound.hxx>
-#include <BRep_Builder.hxx>
-#include <BRepTools.hxx>
-#include <BRep_Tool.hxx>
-#include <TopExp_Explorer.hxx>
-#include <BRepMesh.hxx>
-#include <Poly_Triangulation.hxx>
-#include <Poly_PolygonOnTriangulation.hxx>
-#include <TColgp_Array1OfPnt.hxx>
-#include <TColgp_Array1OfPnt2d.hxx>
-#include <TShort_Array1OfShortReal.hxx>
-#include <Poly_Array1OfTriangle.hxx>
-#include <StdFail_NotDone.hxx>
-#include <BRepGProp_Face.hxx>
-#include <BRepBuilderAPI_GTransform.hxx>
-
-#include "../ifcparse/IfcException.h"
-#include "../ifcgeom/IfcGeomObjects.h"
-#include "../ifcgeom/IfcGeom.h"
-
-// Welds vertices that belong to different faces
-bool weld_vertices = true;
-bool convert_back_units = false;
-bool use_faster_booleans = false;
-
-int IfcGeomObjects::IfcMesh::addvert(const gp_XYZ& p) {
-	const float X = convert_back_units ? (float) (p.X() / Ifc::LengthUnit) : (float)p.X();
-	const float Y = convert_back_units ? (float) (p.Y() / Ifc::LengthUnit) : (float)p.Y();
-	const float Z = convert_back_units ? (float) (p.Z() / Ifc::LengthUnit) : (float)p.Z();
-	int i = (int) verts.size() / 3;
-	if ( weld_vertices ) {
-		const VertKey key = VertKey(X,std::pair<float,float>(Y,Z));
-		VertKeyMap::const_iterator it = welds.find(key);
-		if ( it != welds.end() ) return it->second;
-		i = (int) welds.size();
-		welds[key] = i;
-	}
-	verts.push_back(X);
-	verts.push_back(Y);
-	verts.push_back(Z);
-	return i;
-}
-
-bool use_world_coords = false;
-bool use_brep_data = false;
-
-IfcGeomObjects::IfcMesh::IfcMesh(int i, const IfcGeom::ShapeList& shapes) {
-	id = i;
-
-	if ( use_brep_data ) {
-		TopoDS_Compound compound;
-		BRep_Builder builder;
-		builder.MakeCompound(compound);
-		for ( IfcGeom::ShapeList::const_iterator it = shapes.begin(); it != shapes.end(); ++ it ) {
-			const TopoDS_Shape& s = *(*it).second;
-			const gp_GTrsf& trsf = *(*it).first;
-			bool trsf_valid = false;
-			gp_Trsf _trsf;
-			try {
-				_trsf = trsf.Trsf();
-				trsf_valid = true;
-			} catch (...) {}
-			const TopoDS_Shape moved_shape = trsf_valid ? s.Moved(_trsf) :
-				BRepBuilderAPI_GTransform(s,trsf,true).Shape();
-			builder.Add(compound,moved_shape);
-		}
-		std::stringstream sstream;
-		BRepTools::Write(compound,sstream);
-		brep_data = sstream.str();
-	} else
-	for ( IfcGeom::ShapeList::const_iterator it = shapes.begin(); it != shapes.end(); ++ it ) {
-
-		const TopoDS_Shape& s = *(*it).second;
-		const gp_GTrsf& trsf = *(*it).first;
-
-		// Triangulate the shape
-		try {
-			//BRepTools::Clean(s);
-			BRepMesh::Mesh(s,DEFLECTION_TOLERANCE);
-		} catch(...) {
-			Ifc::LogMessage("Error","Failed to triangulate mesh:",Ifc::EntityById(i)->entity);
-			continue;
-		}
-		TopExp_Explorer exp;
-
-		// Iterates over the faces of the shape
-		for ( exp.Init(s,TopAbs_FACE); exp.More(); exp.Next() ) {
-			TopoDS_Face face = TopoDS::Face(exp.Current());
-			TopLoc_Location loc;
-			Handle_Poly_Triangulation tri = BRep_Tool::Triangulation(face,loc);
-
-			if ( ! tri.IsNull() ) {
-
-				// A 3x3 matrix to rotate the vertex normals
-				const gp_Mat rotation_matrix = trsf.VectorialPart();
-			
-				// Keep track of the number of times an edge is used
-				// Manifold edges (i.e. edges used twice) are deemed invisible
-				std::map<std::pair<int,int>,int> edgecount;
-				std::vector<std::pair<int,int> > edges_temp;
-
-				const TColgp_Array1OfPnt& nodes = tri->Nodes();
-				const TColgp_Array1OfPnt2d& uvs = tri->UVNodes();
-				std::vector<gp_XYZ> coords;
-				BRepGProp_Face prop(face);
-				std::map<int,int> dict;
-
-				// Vertex normals are only calculated if vertices are not welded
-				const bool calculate_normals = ! weld_vertices;
-
-				for( int i = 1; i <= nodes.Length(); ++ i ) {
-					coords.push_back(nodes(i).Transformed(loc).XYZ());
-					trsf.Transforms(*coords.rbegin());
-					dict[i] = addvert(*coords.rbegin());
-					
-					if ( calculate_normals ) {
-						const gp_Pnt2d& uv = uvs(i);
-						gp_Pnt p;
-						gp_Vec normal_direction;
-						prop.Normal(uv.X(),uv.Y(),p,normal_direction);						
-						gp_Dir normal = gp_Dir(normal_direction.XYZ() * rotation_matrix);
-						normals.push_back((float)normal.X());
-						normals.push_back((float)normal.Y());
-						normals.push_back((float)normal.Z());
-					}
-				}
-
-				const Poly_Array1OfTriangle& triangles = tri->Triangles();			
-				for( int i = 1; i <= triangles.Length(); ++ i ) {
-					int n1,n2,n3;
-					if ( face.Orientation() == TopAbs_REVERSED )
-						triangles(i).Get(n3,n2,n1);
-					else triangles(i).Get(n1,n2,n3);
-
-					/* An alternative would be to calculate normals based
-					 * on the coordinates of the mesh vertices */
-					/*
-					const gp_XYZ pt1 = coords[n1-1];
-					const gp_XYZ pt2 = coords[n2-1];
-					const gp_XYZ pt3 = coords[n3-1];
-					const gp_XYZ v1 = pt2-pt1;
-					const gp_XYZ v2 = pt3-pt2;
-					gp_Dir normal = gp_Dir(v1^v2);
-					normals.push_back((float)normal.X());
-					normals.push_back((float)normal.Y());
-					normals.push_back((float)normal.Z());
-					*/
-
-					faces.push_back(dict[n1]);
-					faces.push_back(dict[n2]);
-					faces.push_back(dict[n3]);
-
-					addedge(n1,n2,edgecount,edges_temp);
-					addedge(n2,n3,edgecount,edges_temp);
-					addedge(n3,n1,edgecount,edges_temp);
-				}
-				for ( std::vector<std::pair<int,int> >::const_iterator it = edges_temp.begin(); it != edges_temp.end(); ++it ) {
-					edges.push_back(edgecount[*it]==1);
-				}
-			}
-		}
-	}
-}
-
-IfcGeomObjects::IfcObject::IfcObject(int my_id, 
-		int p_id, 
-		const std::string& n, 
-		const std::string& t, 
-		const std::string& g, 
-		const gp_Trsf& trsf) {
-
-	// Convert the gp_Trsf into a 4x3 Matrix
-	for( int i = 1; i < 5; ++ i )
-		for ( int j = 1; j < 4; ++ j )
-			matrix.push_back((float)trsf.Value(j,i));
-
-	id = my_id;
-	parent_id = p_id;
-	name = n;
-	type = t;
-	guid = g;
-}
-
-IfcGeomObjects::IfcGeomObject::IfcGeomObject(int my_id, 
-		int p_id, 
-		const std::string& n, 
-		const std::string& t, 
-		const std::string& g,
-		const gp_Trsf& trsf, 
-		IfcMesh* m) : IfcObject(my_id,p_id,n,t,g,trsf) {	
-
-	mesh = m;
-}
-
-// A container and iterator for IfcShapeRepresentations
-Ifc2x3::IfcShapeRepresentation::list shapereps;
-Ifc2x3::IfcShapeRepresentation::it outer;
-
-// The object is fetched beforehand to be positive an entity actually exists
-IfcGeomObjects::IfcGeomObject* current_geom_obj;
-
-// A container and iterator for IfcBuildingElements for the current IfcShapeRepresentation referenced by *outer
-Ifc2x3::IfcProduct::list entities;
-Ifc2x3::IfcProduct::it inner;
-
-int done;
-int total;
-
-// Move the the next IfcShapeRepresentation
-void _nextShape() {
-	entities.reset();
-	++ outer;
-	++ done;
-}
-
-int _getParentId(const Ifc2x3::IfcProduct::ptr ifc_product) {
-	int parent_id = -1;
-	// In case of an opening element, parent to the RelatingBuildingElement
-	if ( ifc_product->is(Ifc2x3::Type::IfcOpeningElement ) ) {
-		Ifc2x3::IfcOpeningElement::ptr opening = reinterpret_pointer_cast<Ifc2x3::IfcProduct,Ifc2x3::IfcOpeningElement>(ifc_product);
-		Ifc2x3::IfcRelVoidsElement::list voids = opening->VoidsElements();
-		if ( voids->Size() ) {
-			Ifc2x3::IfcRelVoidsElement::ptr ifc_void = *voids->begin();
-			parent_id = ifc_void->RelatingBuildingElement()->entity->id();
-		}
-	} else if ( ifc_product->is(Ifc2x3::Type::IfcElement ) ) {
-		Ifc2x3::IfcElement::ptr element = reinterpret_pointer_cast<Ifc2x3::IfcProduct,Ifc2x3::IfcElement>(ifc_product);
-		Ifc2x3::IfcRelFillsElement::list fills = element->FillsVoids();
-		// Incase of a RelatedBuildingElement parent to the opening element
-		if ( fills->Size() ) {
-			for ( Ifc2x3::IfcRelFillsElement::it it = fills->begin(); it != fills->end(); ++ it ) {
-				Ifc2x3::IfcRelFillsElement::ptr fill = *it;
-				Ifc2x3::IfcObjectDefinition* ifc_objectdef = fill->RelatingOpeningElement();
-				if ( ifc_product == ifc_objectdef ) continue;
-				parent_id = ifc_objectdef->entity->id();
-			}
-		} 
-		// Else simply parent to the containing structure
-		if ( parent_id == -1 ) {
-			Ifc2x3::IfcRelContainedInSpatialStructure::list parents = element->ContainedInStructure();
-			if ( parents->Size() ) {
-				Ifc2x3::IfcRelContainedInSpatialStructure::ptr parent = *parents->begin();
-				parent_id = parent->RelatingStructure()->entity->id();
-			}
-		}
-	}
-	// Parent decompositions to the RelatingObject
-	if ( parent_id == -1 ) {
-		IfcEntities parents = ifc_product->entity->getInverse(Ifc2x3::Type::IfcRelAggregates);
-		parents->push(ifc_product->entity->getInverse(Ifc2x3::Type::IfcRelNests));
-		for ( IfcEntityList::it it = parents->begin(); it != parents->end(); ++ it ) {
-			Ifc2x3::IfcRelDecomposes::ptr decompose = reinterpret_pointer_cast<IfcBaseClass,Ifc2x3::IfcRelDecomposes>(*it);
-			Ifc2x3::IfcObjectDefinition* ifc_objectdef = decompose->RelatingObject();
-			if ( ifc_product == ifc_objectdef ) continue;
-			parent_id = ifc_objectdef->entity->id();
-		}
-	}
-	return parent_id;
-}
-
-// Returns the current IfcGeomObject*
-IfcGeomObjects::IfcGeomObject* _get() {
-	while ( true ) {
-		Ifc2x3::IfcShapeRepresentation::ptr shaperep;
-
-		// Have we reached the end of our list of representations?
-		if ( outer == shapereps->end() ) {
-			shapereps.reset();
-			return 0;
-		}
-		shaperep = *outer;
-
-		// Has the list of IfcProducts for this representation been initialized?
-		if ( ! entities ) {
-			if ( shaperep->hasRepresentationIdentifier() ) {
-				const std::string representation_identifier = shaperep->RepresentationIdentifier();
-				if ( shaperep->hasRepresentationType() && representation_identifier == "IAI" && shaperep->RepresentationType() != "BoundingBox" ) {
-					// Allow for Ifc 2x compatibility
-				} else if ( representation_identifier != "Body" &&
-					representation_identifier != "Facetation" ) {
-						_nextShape();
-						continue;
-				}
-			}
-			Ifc2x3::IfcProductRepresentation::list prodreps = shaperep->OfProductRepresentation();
-			entities = Ifc2x3::IfcProduct::list( new IfcTemplatedEntityList<Ifc2x3::IfcProduct>() );
-			for ( Ifc2x3::IfcProductRepresentation::it it = prodreps->begin(); it != prodreps->end(); ++it ) {
-				if ( (*it)->is(Ifc2x3::Type::IfcProductDefinitionShape) ) {
-					Ifc2x3::IfcProductDefinitionShape::ptr pds = reinterpret_pointer_cast<Ifc2x3::IfcProductRepresentation,Ifc2x3::IfcProductDefinitionShape>(*it);
-					entities->push(pds->ShapeOfProduct());
-				} else {
-					// http://buildingsmart-tech.org/ifc/IFC2x3/TC1/html/ifcrepresentationresource/lexical/ifcproductrepresentation.htm
-					// IFC2x Edition 3 NOTE  Users should not instantiate the entity IfcProductRepresentation from IFC2x Edition 3 onwards. 
-					// It will be changed into an ABSTRACT supertype in future releases of IFC.
-
-					// IfcProductRepresentation also lacks the INVERSE relation to IfcProduct
-					// Let's find the IfcProducts that reference the IfcProductRepresentation anyway
-					IfcEntities products = (*it)->entity->getInverse(Ifc2x3::Type::IfcProduct);
-					for ( IfcEntityList::it it = products->begin(); it != products->end(); ++ it ) {
-						entities->push(reinterpret_pointer_cast<IfcBaseClass,Ifc2x3::IfcProduct>(*it));
-					}
-				}
-			}
-			// Does this representation have any IfcProducts?
-			if ( ! entities->Size() ) {
-				_nextShape();
-				continue;
-			}
-			inner = entities->begin();
-		}
-		// Have we reached the end of our list of IfcProducts?
-		if ( inner == entities->end() ) {
-			_nextShape();
-			continue;
-		}
-		
-		IfcGeomObjects::IfcMesh* shape;
-		IfcGeom::ShapeList shapes;
-
-		if ( !IfcGeom::convert_shapes(shaperep,shapes) ) {
-			_nextShape();
-			continue;
-		}
-
-		Ifc2x3::IfcProduct::ptr ifc_product = *inner;
-
-		int parent_id = -1;
-		try {
-			parent_id = _getParentId(ifc_product);
-		} catch (...) {}
-		
-		const std::string name = ifc_product->hasName() ? ifc_product->Name() : "";
-		const std::string guid = ifc_product->GlobalId();
-		
-		gp_Trsf trsf;
-		try {
-			IfcGeom::convert(ifc_product->ObjectPlacement(),trsf);
-		} catch (...) {}
-
-		// Does the IfcElement have any IfcOpenings?
-		// Note that openings for IfcOpeningElements are not processed
-		Ifc2x3::IfcRelVoidsElement::list openings = Ifc2x3::IfcRelVoidsElement::list();
-		if ( ifc_product->is(Ifc2x3::Type::IfcElement) && !ifc_product->is(Ifc2x3::Type::IfcOpeningElement) ) {
-			Ifc2x3::IfcElement::ptr element = reinterpret_pointer_cast<Ifc2x3::IfcProduct,Ifc2x3::IfcElement>(ifc_product);
-			openings = element->HasOpenings();
-		}
-		// Is the IfcElement a decomposition of an IfcElement with any IfcOpeningElements?
-		if ( ifc_product->is(Ifc2x3::Type::IfcBuildingElementPart ) ) {
-			Ifc2x3::IfcBuildingElementPart::ptr part = reinterpret_pointer_cast<Ifc2x3::IfcProduct,Ifc2x3::IfcBuildingElementPart>(ifc_product);
-			Ifc2x3::IfcRelDecomposes::list decomposes = part->Decomposes();
-			for ( Ifc2x3::IfcRelDecomposes::it it = decomposes->begin(); it != decomposes->end(); ++ it ) {
-				Ifc2x3::IfcObjectDefinition::ptr obdef = (*it)->RelatingObject();
-				if ( obdef->is(Ifc2x3::Type::IfcElement) ) {
-					Ifc2x3::IfcElement::ptr element = reinterpret_pointer_cast<Ifc2x3::IfcObjectDefinition,Ifc2x3::IfcElement>(obdef);
-					openings->push(element->HasOpenings());
-				}
-			}
-		}
-
-		if ( openings && openings->Size() ) {
-			IfcGeom::ShapeList opened_shapes;
-			try {
-				if ( use_faster_booleans ) {
-					bool succes = IfcGeom::convert_openings_fast(ifc_product,openings,shapes,trsf,opened_shapes);
-					if ( ! succes ) {
-						for ( IfcGeom::ShapeList::const_iterator it = opened_shapes.begin(); it != opened_shapes.end(); ++ it ) {
-							delete it->first;
-							delete it->second;
-						}
-						opened_shapes.clear();
-						IfcGeom::convert_openings(ifc_product,openings,shapes,trsf,opened_shapes);
-					}
-				} else {
-					IfcGeom::convert_openings(ifc_product,openings,shapes,trsf,opened_shapes);
-				}
-			} catch(...) { 
-				Ifc::LogMessage("Error","Error processing openings for:",ifc_product->entity); 
-			}
-			if ( use_world_coords ) {
-				for ( IfcGeom::ShapeList::const_iterator it = opened_shapes.begin(); it != opened_shapes.end(); ++ it ) {
-					it->first->PreMultiply(trsf);
-				}
-				trsf = gp_Trsf();
-			}
-			shape = new IfcGeomObjects::IfcMesh(shaperep->entity->id(),opened_shapes);
-			for ( IfcGeom::ShapeList::const_iterator it = opened_shapes.begin(); it != opened_shapes.end(); ++ it ) {
-				delete it->first;
-				delete it->second;
-			}
-		} else if ( use_world_coords ) {
-			for ( IfcGeom::ShapeList::const_iterator it = shapes.begin(); it != shapes.end(); ++ it ) {
-				it->first->PreMultiply(trsf);
-			}
-			trsf = gp_Trsf();
-			shape = new IfcGeomObjects::IfcMesh(shaperep->entity->id(),shapes);
-		} else {
-			shape = new IfcGeomObjects::IfcMesh(shaperep->entity->id(),shapes);
-		}
-
-		IfcGeomObjects::IfcGeomObject* geom_obj = new IfcGeomObjects::IfcGeomObject(ifc_product->entity->id(), parent_id, name, 
-			Ifc2x3::Type::ToString(ifc_product->type()), guid, trsf, shape);
-
-		for ( IfcGeom::ShapeList::const_iterator it = shapes.begin(); it != shapes.end(); ++ it ) {
-			delete it->first;
-		}
-
-		return geom_obj;
-	}	
-}
-
-bool IfcGeomObjects::Next() {
-	if ( current_geom_obj ) {
-		delete current_geom_obj->mesh;
-		delete current_geom_obj;
-	}
-	if ( entities ) {
-		++inner;
-	}
-	current_geom_obj = _get();
-	if ( ! current_geom_obj ) {
-		return false;
-	} else {
-		return true;
-	}
-}
-std::vector<IfcGeomObjects::IfcObject*> returned_objects;
-bool IfcGeomObjects::CleanUp() {
-	Ifc::Dispose();
-	IfcGeom::Cache::Purge();
-	for ( std::vector<IfcGeomObjects::IfcObject*>::const_iterator it = returned_objects.begin();
-		it != returned_objects.end(); 
-		++ it ) {
-			delete *it;			
-	}
-	returned_objects.clear();
-	return true;
-}
-const IfcGeomObjects::IfcObject* IfcGeomObjects::GetObject(int id) {
-	IfcObject* ifc_object = 0;
-	try {
-		const IfcEntity& ifc_entity = Ifc::EntityById(id);
-		if ( ifc_entity->is(Ifc2x3::Type::IfcProduct) ) {
-			Ifc2x3::IfcProduct::ptr ifc_product = reinterpret_pointer_cast<IfcUtil::IfcBaseClass,Ifc2x3::IfcProduct>(ifc_entity);
-			int parent_id = -1;
-			try {
-				parent_id = _getParentId(ifc_product);
-			} catch (...) {}
-			const std::string name = ifc_product->hasName() ? ifc_product->Name() : "";
-			gp_Trsf trsf;
-			try {
-				IfcGeom::convert(ifc_product->ObjectPlacement(),trsf);
-			} catch (...) {}
-			ifc_object = new IfcObject(ifc_product->entity->id(),parent_id,name,
-				Ifc2x3::Type::ToString(ifc_product->type()),ifc_product->GlobalId(),trsf);
-		}
-	} catch(...) {}
-	if ( !ifc_object ) ifc_object = new IfcObject(-1,-1,"","","",gp_Trsf());
-	returned_objects.push_back(ifc_object);
-	return ifc_object;
-}
-const IfcGeomObjects::IfcGeomObject* IfcGeomObjects::Get() {
-	return current_geom_obj;
-}
-bool IfcGeomObjects::Init(const std::string fn) {
-	return IfcGeomObjects::Init(fn, 0, 0);
-}
-bool _Init() {
-	shapereps = Ifc::EntitiesByType<Ifc2x3::IfcShapeRepresentation>();
-	if ( ! shapereps ) return false;
-	
-	outer = shapereps->begin();
-	entities.reset();
-	current_geom_obj = _get();
-	
-	if ( ! current_geom_obj ) return false;
-
-	done = 0;
-	total = shapereps->Size();
-	return true;
-}
-bool IfcGeomObjects::Init(const std::string fn, std::ostream* log1, std::ostream* log2) {
-	Ifc::SetOutput(log1,log2);
-	if ( !Ifc::Init(fn) ) return false;
-	return _Init();	
-}
-bool IfcGeomObjects::Init(std::istream& f, int len, std::ostream* log1, std::ostream* log2) {
-	Ifc::SetOutput(log1,log2);
-	if ( !Ifc::Init(f, len) ) return false;
-	return _Init();
-}
-bool IfcGeomObjects::Init(void* data, int len) {
-	Ifc::SetOutput(0,0);
-	if ( !Ifc::Init(data, len) ) return false;
-	return _Init();
-}
-void IfcGeomObjects::Settings(int setting, bool value) {
-	switch ( setting ) {
-	case USE_WORLD_COORDS:
-		use_world_coords = value;
-		break;
-	case WELD_VERTICES:
-		weld_vertices = value;
-		break;
-	case CONVERT_BACK_UNITS:
-		convert_back_units = value;
-		break;
-	case USE_BREP_DATA:
-		use_brep_data = value;
-		break;
-	case FASTER_BOOLEANS:
-		use_faster_booleans = value;
-		break;
-	case SEW_SHELLS:
-		Ifc::SewShells = value;
-		break;
-	}
-}
-int IfcGeomObjects::Progress() {
-	return 100 * done / total;
-}
-std::string IfcGeomObjects::GetLog() {
-	return Ifc::GetLog();
-}

src/ifcgeom/IfcGeomObjects.h

@@ -1,160 +0,0 @@
-/********************************************************************************
- *                                                                              *
- * This file is part of IfcOpenShell.                                           *
- *                                                                              *
- * IfcOpenShell is free software: you can redistribute it and/or modify         *
- * it under the terms of the Lesser GNU General Public License as published by  *
- * the Free Software Foundation, either version 3.0 of the License, or          *
- * (at your option) any later version.                                          *
- *                                                                              *
- * IfcOpenShell is distributed in the hope that it will be useful,              *
- * but WITHOUT ANY WARRANTY; without even the implied warranty of               *
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                 *
- * Lesser GNU General Public License for more details.                          *
- *                                                                              *
- * You should have received a copy of the Lesser GNU General Public License     *
- * along with this program. If not, see <http://www.gnu.org/licenses/>.         *
- *                                                                              *
- ********************************************************************************/
-
-/********************************************************************************
- *                                                                              *
- * Geometrical data in an IFC file consists of shapes (IfcShapeRepresentation)  *
- * and instances (SUBTYPE OF IfcBuildingElement e.g. IfcWindow).                *
- *                                                                              *
- * IfcMesh is a class that represents a triangulated IfcShapeRepresentation.    *
- *   IfcMesh.verts is a 1 dimensional vector of float defining the cartesian    *
- *      coordinates of the vertices of the triangulated shape in the format of  *
- *      [x1,y1,z1,..,xn,yn,zn]                                                  *
- *   IfcMesh.faces is a 1 dimensional vector of int containing the indices of   *
- *     the triangles referencing positions in IfcMesh.verts                     *
- *   IfcMesh.edges is a 1 dimensional vector of int in {0,1} that dictates      *
- *	   the visibility of the edges that span the faces in IfcMesh.faces         *
- *                                                                              *
- * IfcGeomObject represents the actual IfcBuildingElements.                     *
- *   IfcGeomObject.name is the GUID of the element                              *
- *   IfcGeomObject.type is the datatype of the element e.g. IfcWindow           *
- *   IfcGeomObject.mesh is a pointer to an IfcMesh                              *
- *   IfcGeomObject.matrix is a 4x3 matrix that defines the orientation and      *
- *     translation of the mesh in relation to the world origin                  *
- *                                                                              *
- * Init(char* fn) parses the IFC file in fn, returns true on succes.            *
- *                                                                              *
- * Get() returns a pointer to the current IfcGeomObject                         *
- *                                                                              * 
- * Next() returns true if there is an entity yet available                      *
- *                                                                              *
- * Progress() returns an int in [0..100] that indicates the overall progress    *
- *                                                                              *
- ********************************************************************************/
-
-#ifndef IFCOBJECTS_H
-#define IFCOBJECTS_H
-
-#include <map>
-#include <vector>
-#include <algorithm>
-
-#include <gp_Mat.hxx>
-#include <gp_Mat2d.hxx>
-#include <gp_GTrsf.hxx>
-#include <gp_GTrsf2d.hxx>
-#include <gp_Trsf.hxx>
-#include <gp_Trsf2d.hxx>
-
-#include "../ifcparse/IfcParse.h"
-#include "../ifcgeom/IfcShapeList.h"
-
-namespace IfcGeomObjects {
-
-	// Enumeration of setting identifiers. These settings define the
-	// behaviour of various aspects of IfcOpenShell.
-
-	// Specifies whether vertices are welded, meaning that the coordinates
-	// vector will only contain unique xyz-triplets. This results in a 
-	// manifold mesh which is useful for modelling applications, but might 
-	// result in unwanted shading artifacts in rendering applications.
-	const int WELD_VERTICES = 1;
-	// Specifies whether to apply the local placements of building elements
-	// directly to the coordinates of the representation mesh rather than
-	// to represent the local placement in the 4x3 matrix, which will in that
-	// case be the identity matrix.
-	const int USE_WORLD_COORDS = 2;
-	// Internally IfcOpenShell measures everything in meters. This settings
-	// specifies whether to convert IfcGeomObjects back to the units in which
-	// the geometry in the IFC file is specified.
-	const int CONVERT_BACK_UNITS = 3;
-	// Specifies whether to use the Open Cascade BREP format for representation
-	// items rather than to create triangle meshes. This is useful is IfcOpenShell
-	// is used as a library in an application that is also built on Open Cascade.
-	const int USE_BREP_DATA = 4;
-	// Specifies whether to sew IfcConnectedFaceSets (open and closed shells) to
-	// TopoDS_Shells or whether to keep them as a loose collection of faces.
-	const int SEW_SHELLS = 5;
-	// Specifies whether to compose IfcOpeningElements into a single compound
-	// in order to speed up the processing of opening subtractions.
-	const int FASTER_BOOLEANS = 6;
-
-	// End of settings enumeration.
-
-	// Some typedefs for convenience
-	typedef std::vector<int>::const_iterator IntIt;
-	typedef std::vector<float>::const_iterator FltIt;
-	// A nested pair of doubles to be able to store an XYZ coordinate in a map.
-	typedef std::pair< float,std::pair<float,float> > VertKey;
-	typedef std::map<VertKey,int> VertKeyMap;
-	typedef std::pair<int,int> Edge;
-
-	class IfcMesh {
-	public:
-		int id;
-		std::vector<float> verts;
-		std::vector<int> faces;
-		std::vector<int> edges;
-		std::vector<float> normals;
-		std::string brep_data;
-		VertKeyMap welds;
-		
-		IfcMesh(int i, const IfcGeom::ShapeList& s);
-	private:
-		int addvert(const gp_XYZ& p);
-		inline void addedge(int n1, int n2, std::map<std::pair<int,int>,int>& edgecount, std::vector<std::pair<int,int> >& edges_temp) {
-			const Edge e = Edge( (std::min)(n1,n2),(std::max)(n1,n2) );
-			if ( edgecount.find(e) == edgecount.end() ) edgecount[e] = 1;
-			else edgecount[e] ++;
-			edges_temp.push_back(e);
-		}
-	};
-
-	class IfcObject {
-	public:
-		int id;
-		int parent_id;
-		std::string name;
-		std::string type;
-		std::string guid;
-		std::vector<float> matrix;
-		IfcObject(int my_id, int p_id, const std::string& n, const std::string& t, const std::string& g, const gp_Trsf& trsf);
-	};
-
-	class IfcGeomObject : public IfcObject {
-	public:
-		IfcMesh* mesh;
-		IfcGeomObject(int my_id, int p_id, const std::string& n, const std::string& t, const std::string& g, const gp_Trsf& trsf, IfcMesh* m);
-	};
-
-	bool Init(const std::string fn);
-	bool Init(void* data, int len);
-	bool Init(const std::string fn, std::ostream* log1= 0, std::ostream* log2= 0);
-	bool Init(std::istream& f, int len, std::ostream* log1= 0, std::ostream* log2= 0);
-	void Settings(int setting, bool value);
-	bool CleanUp();
-	const IfcGeomObject* Get();
-	bool Next();	
-	int Progress();
-	const IfcObject* GetObject(int id);
-	std::string GetLog();
-
-}
-
-#endif

src/ifcgeom/IfcGeomRenderStyles.cpp

@@ -0,0 +1,162 @@
+/********************************************************************************
+ *                                                                              *
+ * This file is part of IfcOpenShell.                                           *
+ *                                                                              *
+ * IfcOpenShell is free software: you can redistribute it and/or modify         *
+ * it under the terms of the Lesser GNU General Public License as published by  *
+ * the Free Software Foundation, either version 3.0 of the License, or          *
+ * (at your option) any later version.                                          *
+ *                                                                              *
+ * IfcOpenShell is distributed in the hope that it will be useful,              *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of               *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                 *
+ * Lesser GNU General Public License for more details.                          *
+ *                                                                              *
+ * You should have received a copy of the Lesser GNU General Public License     *
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.         *
+ *                                                                              *
+ ********************************************************************************/
+
+#include <map>
+
+#include "IfcGeom.h"
+
+bool process_colour(IfcSchema::IfcColourRgb* colour, std::tr1::array<double, 3>& rgb) {
+	if (colour != 0) {
+		rgb[0] = colour->Red();
+		rgb[1] = colour->Green();
+		rgb[2] = colour->Blue();
+	}
+	return colour != 0;
+}
+
+bool process_colour(IfcSchema::IfcNormalisedRatioMeasure* factor, std::tr1::array<double, 3>& rgb) {
+	if (factor != 0) {
+		const double f = *factor;
+		rgb[0] = rgb[1] = rgb[2] = f;
+	}
+	return factor != 0;
+}
+
+bool process_colour(IfcSchema::IfcColourOrFactor* colour_or_factor, std::tr1::array<double, 3>& rgb) {
+	if (colour_or_factor == 0) {
+		return false;
+	} else if (colour_or_factor->is(IfcSchema::Type::IfcColourRgb)) {
+		return process_colour(static_cast<IfcSchema::IfcColourRgb*>(colour_or_factor), rgb);
+	} else if (colour_or_factor->is(IfcSchema::Type::IfcNormalisedRatioMeasure)) {
+		return process_colour(static_cast<IfcSchema::IfcNormalisedRatioMeasure*>(colour_or_factor), rgb);
+	} else {
+		return false;
+	}
+}
+
+const IfcGeom::SurfaceStyle* IfcGeom::Kernel::get_style(const IfcSchema::IfcRepresentationItem* item) {
+	std::pair<IfcSchema::IfcSurfaceStyle*, IfcSchema::IfcSurfaceStyleShading*> shading_styles = get_surface_style<IfcSchema::IfcSurfaceStyleShading>(item);
+	if (shading_styles.second == 0) {
+		return 0;
+	}
+	int surface_style_id = shading_styles.first->entity->id();
+	std::map<int,SurfaceStyle>::const_iterator it = cache.Style.find(surface_style_id);
+	if (it != cache.Style.end()) {
+		return &(it->second);
+	}
+	SurfaceStyle surface_style;
+	if (shading_styles.first->Name()) {
+		surface_style = SurfaceStyle(surface_style_id, *shading_styles.first->Name());
+	} else {
+		surface_style = SurfaceStyle(surface_style_id);
+	}
+	std::tr1::array<double, 3> rgb;
+	if (process_colour(shading_styles.second->SurfaceColour(), rgb)) {
+		surface_style.Diffuse().reset(SurfaceStyle::ColorComponent(rgb[0], rgb[1], rgb[2]));
+	}
+	if (shading_styles.second->is(IfcSchema::Type::IfcSurfaceStyleRendering)) {
+		IfcSchema::IfcSurfaceStyleRendering* rendering_style = static_cast<IfcSchema::IfcSurfaceStyleRendering*>(shading_styles.second);
+		if (rendering_style->DiffuseColour() && process_colour(*rendering_style->DiffuseColour(), rgb)) {
+			SurfaceStyle::ColorComponent diffuse = surface_style.Diffuse().get_value_or(SurfaceStyle::ColorComponent(1,1,1));
+			surface_style.Diffuse().reset(SurfaceStyle::ColorComponent(diffuse.R() * rgb[0], diffuse.G() * rgb[1], diffuse.B() * rgb[2]));
+		}
+		if (rendering_style->DiffuseTransmissionColour()) {
+			// Not supported
+		}
+		if (rendering_style->ReflectionColour()) {
+			// Not supported
+		}
+		if (rendering_style->SpecularColour() && process_colour(*rendering_style->SpecularColour(), rgb)) {
+			surface_style.Specular().reset(SurfaceStyle::ColorComponent(rgb[0], rgb[1], rgb[2]));
+		}
+		if (rendering_style->SpecularHighlight()) {
+			IfcSchema::IfcSpecularHighlightSelect* highlight = *rendering_style->SpecularHighlight();
+			if (highlight->is(IfcSchema::Type::IfcSpecularRoughness)) {
+				double roughness = *((IfcSchema::IfcSpecularRoughness*)highlight);
+				if (roughness >= 1e-9) {
+					surface_style.Specularity().reset(1.0 / roughness);
+				}
+			} else if (highlight->is(IfcSchema::Type::IfcSpecularExponent)) {
+				surface_style.Specularity().reset(*((IfcSchema::IfcSpecularExponent*)highlight));
+			}
+		}
+		if (rendering_style->TransmissionColour()) {
+			// Not supported
+		}
+		if (rendering_style->Transparency()) {
+			const double d = *rendering_style->Transparency();
+			surface_style.Transparency().reset(d);
+		}
+	}
+	return &(cache.Style[surface_style_id] = surface_style);
+}
+
+static std::map<std::string, IfcGeom::SurfaceStyle> default_materials;
+static IfcGeom::SurfaceStyle default_material;
+static bool default_materials_initialized = false;
+
+void InitDefaultMaterials() {
+	default_materials.insert(std::make_pair("IfcSite", IfcGeom::SurfaceStyle("IfcSite")));
+	default_materials["IfcSite"            ].Diffuse().reset(IfcGeom::SurfaceStyle::ColorComponent(0.75, 0.8, 0.65));
+
+	default_materials.insert(std::make_pair("IfcSlab", IfcGeom::SurfaceStyle("IfcSlab")));
+	default_materials["IfcSlab"            ].Diffuse().reset(IfcGeom::SurfaceStyle::ColorComponent(0.4 , 0.4, 0.4 ));
+	
+	default_materials.insert(std::make_pair("IfcWallStandardCase", IfcGeom::SurfaceStyle("IfcWallStandardCase")));
+	default_materials["IfcWallStandardCase"].Diffuse().reset(IfcGeom::SurfaceStyle::ColorComponent(0.9 , 0.9, 0.9 ));
+	
+	default_materials.insert(std::make_pair("IfcWall", IfcGeom::SurfaceStyle("IfcWall")));
+	default_materials["IfcWall"            ].Diffuse().reset(IfcGeom::SurfaceStyle::ColorComponent(0.9 , 0.9, 0.9 ));
+	
+	default_materials.insert(std::make_pair("IfcWindow", IfcGeom::SurfaceStyle("IfcWindow")));
+	default_materials["IfcWindow"          ].Diffuse().reset(IfcGeom::SurfaceStyle::ColorComponent(0.75, 0.8, 0.75));
+	default_materials["IfcWindow"          ].Transparency().reset(0.3);
+	
+	default_materials.insert(std::make_pair("IfcDoor", IfcGeom::SurfaceStyle("IfcDoor")));
+	default_materials["IfcDoor"            ].Diffuse().reset(IfcGeom::SurfaceStyle::ColorComponent(0.55, 0.3, 0.15));
+	
+	default_materials.insert(std::make_pair("IfcBeam", IfcGeom::SurfaceStyle("IfcBeam")));
+	default_materials["IfcBeam"            ].Diffuse().reset(IfcGeom::SurfaceStyle::ColorComponent(0.75, 0.7, 0.7 ));
+	
+	default_materials.insert(std::make_pair("IfcRailing", IfcGeom::SurfaceStyle("IfcRailing")));
+	default_materials["IfcRailing"         ].Diffuse().reset(IfcGeom::SurfaceStyle::ColorComponent(0.65, 0.6, 0.6 ));
+	
+	default_materials.insert(std::make_pair("IfcMember", IfcGeom::SurfaceStyle("IfcMember")));
+	default_materials["IfcMember"          ].Diffuse().reset(IfcGeom::SurfaceStyle::ColorComponent(0.65, 0.6, 0.6 ));
+	
+	default_materials.insert(std::make_pair("IfcPlate", IfcGeom::SurfaceStyle("IfcPlate")));
+	default_materials["IfcPlate"           ].Diffuse().reset(IfcGeom::SurfaceStyle::ColorComponent(0.8 , 0.8, 0.8 ));
+
+	default_material = IfcGeom::SurfaceStyle("DefaultMaterial");
+	default_material.Diffuse().reset(IfcGeom::SurfaceStyle::ColorComponent(0.7, 0.7, 0.7));
+
+	default_materials_initialized = true;
+}
+
+const IfcGeom::SurfaceStyle* IfcGeom::get_default_style(const std::string& s) {
+	if (!default_materials_initialized) InitDefaultMaterials();
+	std::map<std::string, IfcGeom::SurfaceStyle>::const_iterator it = default_materials.find(s);
+	if (it == default_materials.end()) {
+		default_materials.insert(std::make_pair(s, IfcGeom::SurfaceStyle(s)));
+		default_materials[s].Diffuse().reset(*default_material.Diffuse());
+		it = default_materials.find(s);
+	}
+	const IfcGeom::SurfaceStyle& surface_style = it->second;
+	return &surface_style;
+}

src/ifcgeom/IfcGeomRenderStyles.h

@@ -0,0 +1,103 @@
+/********************************************************************************
+ *                                                                              *
+ * This file is part of IfcOpenShell.                                           *
+ *                                                                              *
+ * IfcOpenShell is free software: you can redistribute it and/or modify         *
+ * it under the terms of the Lesser GNU General Public License as published by  *
+ * the Free Software Foundation, either version 3.0 of the License, or          *
+ * (at your option) any later version.                                          *
+ *                                                                              *
+ * IfcOpenShell is distributed in the hope that it will be useful,              *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of               *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                 *
+ * Lesser GNU General Public License for more details.                          *
+ *                                                                              *
+ * You should have received a copy of the Lesser GNU General Public License     *
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.         *
+ *                                                                              *
+ ********************************************************************************/
+
+#ifndef IFCGEOMRENDERSTYLES_H
+#define IFCGEOMRENDERSTYLES_H
+
+#ifdef __GNUC__
+#include <tr1/array>
+#else
+#include <array>
+#endif
+
+#ifdef USE_IFC4
+#include "../ifcparse/Ifc4.h"
+#else
+#include "../ifcparse/Ifc2x3.h"
+#endif
+
+namespace IfcGeom {
+	class SurfaceStyle {
+	public:
+		class ColorComponent {
+		private:
+			std::tr1::array<double, 3> data;
+		public:
+			ColorComponent(double r, double g, double b) {
+				data[0] = r; data[1] = g; data[2] = b;
+			}
+			const double& R() const { return data[0]; }
+			const double& G() const { return data[1]; }
+			const double& B() const { return data[2]; }
+			double& R() { return data[0]; }
+			double& G() { return data[1]; }
+			double& B() { return data[2]; }
+		};
+	private:
+		boost::optional<std::string> name;
+		boost::optional<int> id;
+		boost::optional<ColorComponent> diffuse, specular;
+		boost::optional<double> transparency;
+		boost::optional<double> specularity;
+	public:
+		SurfaceStyle() {
+			this->name = "IfcSurfaceStyleShading";
+		}
+		SurfaceStyle(int id) : id(id) {
+			std::stringstream sstr; 
+			sstr << "IfcSurfaceStyleShading_" << id; 
+			this->name = sstr.str(); 
+		}
+		SurfaceStyle(const std::string& name) : name(name) {}
+		SurfaceStyle(int id, const std::string& name) : id(id) {
+			std::stringstream sstr; 
+			sstr << id << "_" << name;
+			this->name = sstr.str(); 
+		}
+		
+		// Not used at this point. In fact, equality testing in the current
+		// architecture can just as easily be accomplished by comparing the
+		// pointer addresses of the styles, as they are always referenced 
+		// from out of a global map of some sort.
+		bool operator==(const SurfaceStyle& other) {
+			if (name && other.name) {
+				return *name == *other.name;
+			} else if (id && other.id) {
+				return *id == *other.id;
+			} else {
+				return false;
+			}
+		}
+		
+		const std::string& Name() const { return *name; }
+
+		const boost::optional<ColorComponent>& Diffuse() const { return diffuse; }
+		const boost::optional<ColorComponent>& Specular() const { return specular; }
+		const boost::optional<double>& Transparency() const { return transparency; }
+		const boost::optional<double>& Specularity() const { return specularity; }
+		boost::optional<ColorComponent>& Diffuse() { return diffuse; }
+		boost::optional<ColorComponent>& Specular() { return specular; }
+		boost::optional<double>& Transparency() { return transparency; }
+		boost::optional<double>& Specularity() { return specularity; }
+	};
+
+	const SurfaceStyle* get_default_style(const std::string& ifc_type);
+}
+
+#endif

src/ifcgeom/IfcGeomRepresentation.cpp

@@ -0,0 +1,59 @@
+/********************************************************************************
+ *                                                                              *
+ * This file is part of IfcOpenShell.                                           *
+ *                                                                              *
+ * IfcOpenShell is free software: you can redistribute it and/or modify         *
+ * it under the terms of the Lesser GNU General Public License as published by  *
+ * the Free Software Foundation, either version 3.0 of the License, or          *
+ * (at your option) any later version.                                          *
+ *                                                                              *
+ * IfcOpenShell is distributed in the hope that it will be useful,              *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of               *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                 *
+ * Lesser GNU General Public License for more details.                          *
+ *                                                                              *
+ * You should have received a copy of the Lesser GNU General Public License     *
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.         *
+ *                                                                              *
+ ********************************************************************************/
+
+#include <BRep_Tool.hxx>
+#include <BRepTools.hxx>
+#include <BRep_Builder.hxx>
+
+#include <TopoDS_Compound.hxx>
+#include <BRepBuilderAPI_GTransform.hxx>
+
+#include "../ifcgeom/IfcGeom.h"
+
+#include "IfcGeomRepresentation.h"
+
+IfcGeom::Representation::Serialization::Serialization(const BRep& brep)
+	: Representation(brep.settings())
+	, _id(brep.getId())
+{
+	TopoDS_Compound compound;
+	BRep_Builder builder;
+	builder.MakeCompound(compound);
+	for (IfcGeom::IfcRepresentationShapeItems::const_iterator it = brep.begin(); it != brep.end(); ++ it) {
+		const TopoDS_Shape& s = it->Shape();
+		gp_GTrsf trsf = it->Placement();
+		if (settings().convert_back_units()) {
+			gp_Trsf scale;
+			scale.SetScaleFactor(1.0 / settings().unit_magnitude());
+			trsf.PreMultiply(scale);
+		}
+		bool trsf_valid = false;
+		gp_Trsf _trsf;
+		try {
+			_trsf = trsf.Trsf();
+			trsf_valid = true;
+		} catch (...) {}
+		const TopoDS_Shape moved_shape = trsf_valid ? s.Moved(_trsf) :
+			BRepBuilderAPI_GTransform(s,trsf,true).Shape();
+		builder.Add(compound,moved_shape);
+	}
+	std::stringstream sstream;
+	BRepTools::Write(compound,sstream);
+	_brep_data = sstream.str();
+}

src/ifcgeom/IfcGeomRepresentation.h

@@ -0,0 +1,272 @@
+/********************************************************************************
+ *                                                                              *
+ * This file is part of IfcOpenShell.                                           *
+ *                                                                              *
+ * IfcOpenShell is free software: you can redistribute it and/or modify         *
+ * it under the terms of the Lesser GNU General Public License as published by  *
+ * the Free Software Foundation, either version 3.0 of the License, or          *
+ * (at your option) any later version.                                          *
+ *                                                                              *
+ * IfcOpenShell is distributed in the hope that it will be useful,              *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of               *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                 *
+ * Lesser GNU General Public License for more details.                          *
+ *                                                                              *
+ * You should have received a copy of the Lesser GNU General Public License     *
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.         *
+ *                                                                              *
+ ********************************************************************************/
+
+#ifndef IFCGEOMREPRESENTATION_H
+#define IFCGEOMREPRESENTATION_H
+
+#include <BRepMesh_IncrementalMesh.hxx>
+#include <BRepGProp_Face.hxx>
+
+#include <Poly_Triangulation.hxx>
+#include <TColgp_Array1OfPnt.hxx>
+#include <TColgp_Array1OfPnt2d.hxx>
+
+#include <TopExp_Explorer.hxx>
+
+#include "../ifcgeom/IfcGeomIteratorSettings.h"
+#include "../ifcgeom/IfcGeomMaterial.h"
+#include "../ifcgeom/IfcRepresentationShapeItem.h"
+
+namespace IfcGeom {
+
+	namespace Representation {
+
+		class Representation {
+		protected:
+			const ElementSettings _settings;
+		public:
+			explicit Representation(const ElementSettings& settings)
+				: _settings(settings) 
+			{}
+			const ElementSettings& settings() const { return _settings; }
+			virtual ~Representation() {}
+		};
+
+		class BRep : public Representation {
+		private:
+			unsigned int id;
+			const IfcGeom::IfcRepresentationShapeItems shapes;
+			BRep(const BRep& other);
+			BRep& operator=(const BRep& other);
+		public:
+			BRep(const ElementSettings& settings, unsigned int id, const IfcGeom::IfcRepresentationShapeItems& shapes)
+				: Representation(settings)
+				, id(id)
+				, shapes(shapes)
+			{}
+			virtual ~BRep() {}
+			IfcGeom::IfcRepresentationShapeItems::const_iterator begin() const { return shapes.begin(); }
+			IfcGeom::IfcRepresentationShapeItems::const_iterator end() const { return shapes.end(); }
+			const unsigned int& getId() const { return id; }
+		};
+
+		class Serialization : public Representation  {
+		private:
+			int _id;
+			std::string _brep_data;
+		public:
+			int id() const { return _id; }
+			const std::string& brep_data() const { return _brep_data; }
+			Serialization(const BRep& brep);
+			virtual ~Serialization() {}
+		private:
+			Serialization();
+			Serialization(const Serialization&);
+			Serialization& operator=(const Serialization&);
+		};
+
+		template <typename P>
+		class Triangulation : public Representation {
+		private:
+			// A nested pair of floats and a material index to be able to store an XYZ coordinate in a map.
+			// TODO: Make this a std::tuple when compilers add support for that.
+			typedef typename std::pair<P, std::pair<P, P> > Coordinate;
+			typedef typename std::pair<int, Coordinate> VertexKey;
+			typedef std::map<VertexKey, int> VertexKeyMap;
+			typedef std::pair<int, int> Edge;
+
+			int _id;
+			std::vector<P> _verts;
+			std::vector<int> _faces;
+			std::vector<int> _edges;
+			std::vector<P> _normals;
+			std::vector<int> _material_ids;
+			std::vector<Material> _materials;
+			VertexKeyMap welds;
+
+		public:
+			int id() const { return _id; }
+			const std::vector<P>& verts() const { return _verts; }
+			const std::vector<int>& faces() const { return _faces; }
+			const std::vector<int>& edges() const { return _edges; }
+			const std::vector<P>& normals() const { return _normals; }
+			const std::vector<int>& material_ids() const { return _material_ids; }
+			const std::vector<Material>& materials() const { return _materials; }
+			Triangulation(const BRep& shape_model)
+					: Representation(shape_model.settings())
+					, _id(shape_model.getId())
+			{
+				for ( IfcGeom::IfcRepresentationShapeItems::const_iterator it = shape_model.begin(); it != shape_model.end(); ++ it ) {
+
+					int surface_style_id = -1;
+					if (it->hasStyle()) {
+						Material adapter(&it->Style());
+						std::vector<Material>::const_iterator jt = std::find(_materials.begin(), _materials.end(), adapter);
+						if (jt == _materials.end()) {
+							surface_style_id = _materials.size();
+							_materials.push_back(adapter);
+						} else {
+							surface_style_id = jt - _materials.begin();
+						}
+					}
+
+					if (settings().apply_default_materials() && surface_style_id == -1) {
+						Material material(IfcGeom::get_default_style(settings().element_type()));
+						std::vector<Material>::const_iterator it = std::find(_materials.begin(), _materials.end(), material);
+						if (it == _materials.end()) {
+							surface_style_id = _materials.size();
+							_materials.push_back(material);
+						} else {
+							surface_style_id = it - _materials.begin();
+						}
+					}
+
+					const TopoDS_Shape& s = it->Shape();
+					const gp_GTrsf& trsf = it->Placement();
+
+					// Triangulate the shape
+					try {
+						BRepMesh_IncrementalMesh(s, settings().deflection_tolerance());
+					} catch(...) {
+
+						// TODO: Catch outside
+						// Logger::Message(Logger::LOG_ERROR,"Failed to triangulate shape:",ifc_file->entityById(_id)->entity);
+						Logger::Message(Logger::LOG_ERROR,"Failed to triangulate shape");
+						continue;
+					}
+					TopExp_Explorer exp;
+
+					// Iterates over the faces of the shape
+					for ( exp.Init(s,TopAbs_FACE); exp.More(); exp.Next() ) {
+						TopoDS_Face face = TopoDS::Face(exp.Current());
+						TopLoc_Location loc;
+						Handle_Poly_Triangulation tri = BRep_Tool::Triangulation(face,loc);
+
+						if ( ! tri.IsNull() ) {
+
+							// A 3x3 matrix to rotate the vertex normals
+							const gp_Mat rotation_matrix = trsf.VectorialPart();
+			
+							// Keep track of the number of times an edge is used
+							// Manifold edges (i.e. edges used twice) are deemed invisible
+							std::map<std::pair<int,int>,int> edgecount;
+							std::vector<std::pair<int,int> > edges_temp;
+
+							const TColgp_Array1OfPnt& nodes = tri->Nodes();
+							const TColgp_Array1OfPnt2d& uvs = tri->UVNodes();
+							std::vector<gp_XYZ> coords;
+							BRepGProp_Face prop(face);
+							std::map<int,int> dict;
+
+							// Vertex normals are only calculated if vertices are not welded
+							const bool calculate_normals = !settings().weld_vertices();
+
+							for( int i = 1; i <= nodes.Length(); ++ i ) {
+								coords.push_back(nodes(i).Transformed(loc).XYZ());
+								trsf.Transforms(*coords.rbegin());
+								dict[i] = addVertex(surface_style_id, *coords.rbegin());
+					
+								if ( calculate_normals ) {
+									const gp_Pnt2d& uv = uvs(i);
+									gp_Pnt p;
+									gp_Vec normal_direction;
+									prop.Normal(uv.X(),uv.Y(),p,normal_direction);
+									gp_Vec normal(0., 0., 0.);
+									if (normal_direction.Magnitude() > ALMOST_ZERO) {
+										normal = gp_Dir(normal_direction.XYZ() * rotation_matrix);
+									}
+									_normals.push_back((float)normal.X());
+									_normals.push_back((float)normal.Y());
+									_normals.push_back((float)normal.Z());
+								}
+							}
+
+							const Poly_Array1OfTriangle& triangles = tri->Triangles();			
+							for( int i = 1; i <= triangles.Length(); ++ i ) {
+								int n1,n2,n3;
+								if ( face.Orientation() == TopAbs_REVERSED )
+									triangles(i).Get(n3,n2,n1);
+								else triangles(i).Get(n1,n2,n3);
+
+								/* An alternative would be to calculate normals based
+									* on the coordinates of the mesh vertices */
+								/*
+								const gp_XYZ pt1 = coords[n1-1];
+								const gp_XYZ pt2 = coords[n2-1];
+								const gp_XYZ pt3 = coords[n3-1];
+								const gp_XYZ v1 = pt2-pt1;
+								const gp_XYZ v2 = pt3-pt2;
+								gp_Dir normal = gp_Dir(v1^v2);
+								_normals.push_back((float)normal.X());
+								_normals.push_back((float)normal.Y());
+								_normals.push_back((float)normal.Z());
+								*/
+
+								_faces.push_back(dict[n1]);
+								_faces.push_back(dict[n2]);
+								_faces.push_back(dict[n3]);
+
+								_material_ids.push_back(surface_style_id);
+
+								addEdge(n1,n2,edgecount,edges_temp);
+								addEdge(n2,n3,edgecount,edges_temp);
+								addEdge(n3,n1,edgecount,edges_temp);
+							}
+							for ( std::vector<std::pair<int,int> >::const_iterator it = edges_temp.begin(); it != edges_temp.end(); ++it ) {
+								_edges.push_back(edgecount[*it]==1);
+							}
+						}
+					}
+				}
+			}
+			virtual ~Triangulation() {}
+		private:
+			// Welds vertices that belong to different faces
+			int addVertex(int material_index, const gp_XYZ& p) {
+				const P X = static_cast<P>(settings().convert_back_units() ? (p.X() / settings().unit_magnitude()) : p.X());
+				const P Y = static_cast<P>(settings().convert_back_units() ? (p.Y() / settings().unit_magnitude()) : p.Y());
+				const P Z = static_cast<P>(settings().convert_back_units() ? (p.Z() / settings().unit_magnitude()) : p.Z());
+				int i = (int) _verts.size() / 3;
+				if (settings().weld_vertices()) {
+					const VertexKey key = std::make_pair(material_index, std::make_pair(X, std::make_pair(Y, Z)));
+					typename VertexKeyMap::const_iterator it = welds.find(key);
+					if ( it != welds.end() ) return it->second;
+					i = (int) welds.size();
+					welds[key] = i;
+				}
+				_verts.push_back(X);
+				_verts.push_back(Y);
+				_verts.push_back(Z);
+				return i;
+			}
+			inline void addEdge(int n1, int n2, std::map<std::pair<int,int>,int>& edgecount, std::vector<std::pair<int,int> >& edges_temp) {
+				const Edge e = Edge( (std::min)(n1,n2),(std::max)(n1,n2) );
+				if ( edgecount.find(e) == edgecount.end() ) edgecount[e] = 1;
+				else edgecount[e] ++;
+				edges_temp.push_back(e);
+			}
+			Triangulation();
+			Triangulation(const Triangulation&);
+			Triangulation& operator=(const Triangulation&);
+		};
+
+	}
+}
+
+#endif

src/ifcgeom/IfcGeomShapes.cpp

@@ -1,4 +1,4 @@
-/********************************************************************************
+/********************************************************************************
  *                                                                              *
  * This file is part of IfcOpenShell.                                           *
  *                                                                              *
@@ -35,6 +35,7 @@
 #include <gp_GTrsf2d.hxx>
 #include <gp_Trsf.hxx>
 #include <gp_Trsf2d.hxx>
+#include <gp_Ax1.hxx>
 #include <gp_Ax3.hxx>
 #include <gp_Ax2d.hxx>
 #include <gp_Pln.hxx>
@@ -44,12 +45,17 @@
 #include <TColgp_Array1OfPnt2d.hxx>
 #include <TColStd_Array1OfReal.hxx>
 #include <TColStd_Array1OfInteger.hxx>
+
 #include <Geom_Line.hxx>
 #include <Geom_Circle.hxx>
 #include <Geom_Ellipse.hxx>
 #include <Geom_TrimmedCurve.hxx>
+#include <Geom_CylindricalSurface.hxx>
 
 #include <BRepOffsetAPI_Sewing.hxx>
+#include <BRepOffsetAPI_MakePipe.hxx>
+#include <BRepOffsetAPI_MakePipeShell.hxx>
+
 #include <BRepBuilderAPI_MakeFace.hxx>
 #include <BRepBuilderAPI_MakeEdge.hxx>
 #include <BRepBuilderAPI_MakeWire.hxx>
@@ -62,10 +68,21 @@
 #include <TopExp_Explorer.hxx>
 
 #include <BRepPrimAPI_MakePrism.hxx>
+#include <BRepPrimAPI_MakeRevol.hxx>
+#include <BRepPrimAPI_MakeBox.hxx>
+#include <BRepPrimAPI_MakeCone.hxx>
+#include <BRepPrimAPI_MakeCylinder.hxx>
+#include <BRepPrimAPI_MakeSphere.hxx>
+#include <BRepPrimAPI_MakeWedge.hxx>
+
+#include <BRepBuilderAPI_Transform.hxx>
 #include <BRepBuilderAPI_MakeShell.hxx>
 #include <BRepBuilderAPI_MakeSolid.hxx>
 #include <BRepPrimAPI_MakeHalfSpace.hxx>
+
 #include <BRepAlgoAPI_Cut.hxx>
+#include <BRepAlgoAPI_Fuse.hxx>
+#include <BRepAlgoAPI_Common.hxx>
 
 #include <ShapeFix_Shape.hxx>
 #include <ShapeFix_ShapeTolerance.hxx>
@@ -74,259 +91,365 @@
 #include <TopLoc_Location.hxx>
 
 #include <BRepCheck_Analyzer.hxx>
-#include <BRepAlgoAPI_Common.hxx>
+#include <BRepClass3d_SolidClassifier.hxx>
+
+#include <Standard_Version.hxx>
 
 #include "../ifcgeom/IfcGeom.h"
 
-bool IfcGeom::convert(const Ifc2x3::IfcExtrudedAreaSolid::ptr l, TopoDS_Shape& shape) {
-	TopoDS_Face face;
-	if ( ! IfcGeom::convert_face(l->SweptArea(),face) ) return false;
-	const double height = l->Depth() * Ifc::LengthUnit;
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcExtrudedAreaSolid* l, TopoDS_Shape& shape) {
+	TopoDS_Shape face;
+	if ( !convert_face(l->SweptArea(),face) ) return false;
+
+	const double height = l->Depth() * getValue(GV_LENGTH_UNIT);
 	gp_Trsf trsf;
-	IfcGeom::convert(l->Position(),trsf);
+	IfcGeom::Kernel::convert(l->Position(),trsf);
 
 	gp_Dir dir;
 	convert(l->ExtrudedDirection(),dir);
 
-	shape = BRepPrimAPI_MakePrism(face,height*dir);
+	shape.Nullify();
+
+	if (face.ShapeType() == TopAbs_COMPOUND) {
+		
+		// For compounds (most likely the result of a IfcCompositeProfileDef) 
+		// create a compound solid shape.
+		
+		TopExp_Explorer exp(face, TopAbs_FACE);
+		
+		TopoDS_CompSolid compound;
+		BRep_Builder builder;
+		builder.MakeCompSolid(compound);
+		
+		int num_faces_extruded = 0;
+		for (; exp.More(); exp.Next(), ++num_faces_extruded) {
+			builder.Add(compound, BRepPrimAPI_MakePrism(exp.Current(), height*dir));
+		}
+
+		if (num_faces_extruded) {
+			shape = compound;
+		}
+
+	}
+	
+	if (shape.IsNull()) {	
+		shape = BRepPrimAPI_MakePrism(face, height*dir);
+	}
+
 	shape.Move(trsf);
 	return ! shape.IsNull();
 }
-bool IfcGeom::convert(const Ifc2x3::IfcFacetedBrep::ptr l, ShapeList& shape) {
+
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcSurfaceOfLinearExtrusion* l, TopoDS_Shape& shape) {
+	TopoDS_Wire wire;
+	if ( !convert_wire(l->SweptCurve(), wire) ) {
+		TopoDS_Face face;
+		if ( !convert_face(l->SweptCurve(),face) ) return false;
+		TopExp_Explorer exp(face, TopAbs_WIRE);
+		wire = TopoDS::Wire(exp.Current());
+	}
+	const double height = l->Depth() * getValue(GV_LENGTH_UNIT);
+	gp_Trsf trsf;
+	IfcGeom::Kernel::convert(l->Position(),trsf);
+
+	gp_Dir dir;
+	convert(l->ExtrudedDirection(),dir);
+
+	shape = BRepPrimAPI_MakePrism(wire, height*dir);
+	shape.Move(trsf);
+	return !shape.IsNull();
+}
+
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcSurfaceOfRevolution* l, TopoDS_Shape& shape) {
+	TopoDS_Wire wire;
+	if ( !convert_wire(l->SweptCurve(), wire) ) {
+		TopoDS_Face face;
+		if ( !convert_face(l->SweptCurve(),face) ) return false;
+		TopExp_Explorer exp(face, TopAbs_WIRE);
+		wire = TopoDS::Wire(exp.Current());
+	}
+
+	gp_Ax1 ax1;
+	IfcGeom::Kernel::convert(l->AxisPosition(), ax1);
+
+	gp_Trsf trsf;
+	IfcGeom::Kernel::convert(l->Position(),trsf);
+	
+	shape = BRepPrimAPI_MakeRevol(wire, ax1);
+
+	shape.Move(trsf);
+	return !shape.IsNull();
+}
+
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcRevolvedAreaSolid* l, TopoDS_Shape& shape) {
+	const double ang = l->Angle() * getValue(GV_PLANEANGLE_UNIT);
+
+	TopoDS_Face face;
+	if ( ! convert_face(l->SweptArea(),face) ) return false;
+
+	gp_Ax1 ax1;
+	IfcGeom::Kernel::convert(l->Axis(), ax1);
+
+	gp_Trsf trsf;
+	IfcGeom::Kernel::convert(l->Position(),trsf);
+
+	if (ang >= M_PI * 2. - ALMOST_ZERO) {
+		shape = BRepPrimAPI_MakeRevol(face, ax1);
+	} else {
+		shape = BRepPrimAPI_MakeRevol(face, ax1, ang);
+	}
+
+	shape.Move(trsf);
+	return !shape.IsNull();
+}
+
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcFacetedBrep* l, IfcRepresentationShapeItems& shape) {
 	TopoDS_Shape s;
-	if ( const TopoDS_Shape* shape_id = IfcGeom::convert_shape(l->Outer(),s) ) {
-		shape.push_back(LocationShape(new gp_GTrsf(),shape_id));
+	const SurfaceStyle* collective_style = get_style(l);
+	if (convert_shape(l->Outer(),s) ) {
+		const SurfaceStyle* indiv_style = get_style(l->Outer());
+		shape.push_back(IfcRepresentationShapeItem(s, indiv_style ? indiv_style : collective_style));
 		return true;
 	}
 	return false;
 }
-bool IfcGeom::convert(const Ifc2x3::IfcFaceBasedSurfaceModel::ptr l, ShapeList& shapes) {
-	Ifc2x3::IfcConnectedFaceSet::list facesets = l->FbsmFaces();
-	for( Ifc2x3::IfcConnectedFaceSet::it it = facesets->begin(); it != facesets->end(); ++ it ) {
+
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcFaceBasedSurfaceModel* l, IfcRepresentationShapeItems& shapes) {
+	IfcSchema::IfcConnectedFaceSet::list::ptr facesets = l->FbsmFaces();
+	const SurfaceStyle* collective_style = get_style(l);
+	for( IfcSchema::IfcConnectedFaceSet::list::it it = facesets->begin(); it != facesets->end(); ++ it ) {
 		TopoDS_Shape s;
-		if ( const TopoDS_Shape* shape_id = IfcGeom::convert_shape(*it,s) ) {
-			shapes.push_back(LocationShape(new gp_GTrsf(),shape_id));
+		const SurfaceStyle* shell_style = get_style(*it);
+		if (convert_shape(*it,s)) {
+			shapes.push_back(IfcRepresentationShapeItem(s, shell_style ? shell_style : collective_style));
 		}
 	}
 	return true;
 }
-bool IfcGeom::convert(const Ifc2x3::IfcHalfSpaceSolid::ptr l, TopoDS_Shape& shape) {
-	Ifc2x3::IfcSurface::ptr surface = l->BaseSurface();
-	if ( ! surface->is(Ifc2x3::Type::IfcPlane) ) {
-		// Not implemented
+
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcHalfSpaceSolid* l, TopoDS_Shape& shape) {
+	IfcSchema::IfcSurface* surface = l->BaseSurface();
+	if ( ! surface->is(IfcSchema::Type::IfcPlane) ) {
+		Logger::Message(Logger::LOG_ERROR, "Unsupported BaseSurface:", surface->entity);
 		return false;
 	}
 	gp_Pln pln;
-	IfcGeom::convert(reinterpret_pointer_cast<Ifc2x3::IfcSurface,Ifc2x3::IfcPlane>(surface),pln);
+	IfcGeom::Kernel::convert((IfcSchema::IfcPlane*)surface,pln);
 	const gp_Pnt pnt = pln.Location().Translated( l->AgreementFlag() ? -pln.Axis().Direction() : pln.Axis().Direction());
 	shape = BRepPrimAPI_MakeHalfSpace(BRepBuilderAPI_MakeFace(pln),pnt).Solid();
 	return true;
 }
-bool IfcGeom::convert(const Ifc2x3::IfcPolygonalBoundedHalfSpace::ptr l, TopoDS_Shape& shape) {
+
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcPolygonalBoundedHalfSpace* l, TopoDS_Shape& shape) {
 	TopoDS_Shape halfspace;
-	if ( ! IfcGeom::convert(reinterpret_pointer_cast<Ifc2x3::IfcPolygonalBoundedHalfSpace,Ifc2x3::IfcHalfSpaceSolid>(l),halfspace) ) return false;	
+	if ( ! IfcGeom::Kernel::convert((IfcSchema::IfcHalfSpaceSolid*)l,halfspace) ) return false;	
 	TopoDS_Wire wire;
-	if ( ! IfcGeom::convert_wire(l->PolygonalBoundary(),wire) || ! wire.Closed() ) return false;	
+	if ( ! convert_wire(l->PolygonalBoundary(),wire) || ! wire.Closed() ) return false;	
 	gp_Trsf trsf;
 	convert(l->Position(),trsf);
 	TopoDS_Shape prism = BRepPrimAPI_MakePrism(BRepBuilderAPI_MakeFace(wire),gp_Vec(0,0,200));
 	gp_Trsf down; down.SetTranslation(gp_Vec(0,0,-100.0));
-	prism.Move(down*trsf);
+	prism.Move(trsf*down);
 	shape = BRepAlgoAPI_Common(halfspace,prism);
 	return true;
 }
-bool IfcGeom::convert(const Ifc2x3::IfcShellBasedSurfaceModel::ptr l, ShapeList& shapes) {
-	IfcUtil::IfcAbstractSelect::list shells = l->SbsmBoundary();
-	for( IfcUtil::IfcAbstractSelect::it it = shells->begin(); it != shells->end(); ++ it ) {
+
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcShellBasedSurfaceModel* l, IfcRepresentationShapeItems& shapes) {
+	IfcEntityList::ptr shells = l->SbsmBoundary();
+	const SurfaceStyle* collective_style = get_style(l);
+	for( IfcEntityList::it it = shells->begin(); it != shells->end(); ++ it ) {
 		TopoDS_Shape s;
-		if ( const TopoDS_Shape* shape_id = IfcGeom::convert_shape(*it,s) ) {
-			shapes.push_back(LocationShape(new gp_GTrsf(),shape_id));
+		const SurfaceStyle* shell_style = 0;
+		if ((*it)->is(IfcSchema::Type::IfcRepresentationItem)) {
+			shell_style = get_style((IfcSchema::IfcRepresentationItem*)*it);
+		}
+		if (convert_shape(*it,s)) {
+			shapes.push_back(IfcRepresentationShapeItem(s, shell_style ? shell_style : collective_style));
 		}
 	}
 	return true;
 }
-bool IfcGeom::convert(const Ifc2x3::IfcBooleanClippingResult::ptr l, TopoDS_Shape& shape) {
-	TopoDS_Shape s1, s2;
-	TopoDS_Wire boundary_wire;
-	Ifc2x3::IfcBooleanOperand operand2 = l->SecondOperand();
-	bool is_halfspace = operand2->is(Ifc2x3::Type::IfcHalfSpaceSolid);
-	bool is_bounded = operand2->is(Ifc2x3::Type::IfcPolygonalBoundedHalfSpace);
-	bool is_convex_bound = false;
 
-	if ( ! IfcGeom::convert_shape(l->FirstOperand(),s1) )
-		return false;
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcBooleanResult* l, TopoDS_Shape& shape) {
+	TopoDS_Shape s1, s2;
+	IfcRepresentationShapeItems items1, items2;
+	TopoDS_Wire boundary_wire;
+	IfcSchema::IfcBooleanOperand* operand1 = l->FirstOperand();
+	IfcSchema::IfcBooleanOperand* operand2 = l->SecondOperand();
+	bool is_halfspace = operand2->is(IfcSchema::Type::IfcHalfSpaceSolid);
+
+	if ( is_shape_collection(operand1) ) {
+		if (!(convert_shapes(operand1, items1) && flatten_shape_list(items1, s1, true))) {
+			return false;
+		}
+	} else {
+		if ( ! convert_shape(operand1, s1) ) {
+			return false;
+		}
+		{ TopoDS_Solid temp_solid;
+		s1 = ensure_fit_for_subtraction(s1, temp_solid); }
+	}
 
 	const double first_operand_volume = shape_volume(s1);
 	if ( first_operand_volume <= ALMOST_ZERO )
-		Ifc::LogMessage("Warning","Empty solid for:",l->FirstOperand()->entity);
+		Logger::Message(Logger::LOG_WARNING,"Empty solid for:",l->FirstOperand()->entity);
 
-	if ( !IfcGeom::convert_shape(l->SecondOperand(),s2) ) {
+	bool shape2_processed = false;
+	if ( is_shape_collection(operand2) ) {
+		shape2_processed = convert_shapes(operand2, items2) && flatten_shape_list(items2, s2, true);
+	} else {
+		shape2_processed = convert_shape(operand2,s2);
+		if (shape2_processed && !is_halfspace) {
+			TopoDS_Solid temp_solid;
+			s2 = ensure_fit_for_subtraction(s2, temp_solid);
+		}
+	}
+
+	if (!shape2_processed) {
 		shape = s1;
-		Ifc::LogMessage("Error","Failed to convert SecondOperand of:",l->entity);
+		Logger::Message(Logger::LOG_ERROR,"Failed to convert SecondOperand of:",l->entity);
 		return true;
 	}
 
-	if ( is_bounded ) {
-		Ifc2x3::IfcPolygonalBoundedHalfSpace::ptr ifc_bounded_halfspace = 
-			(Ifc2x3::IfcPolygonalBoundedHalfSpace::ptr) operand2;		
-		IfcGeom::convert_wire(ifc_bounded_halfspace->PolygonalBoundary(),boundary_wire);
-		is_convex_bound = is_convex(boundary_wire);
-	}
-
-	if ( ! is_halfspace ) {
+	if (!is_halfspace) {
 		const double second_operand_volume = shape_volume(s2);
 		if ( second_operand_volume <= ALMOST_ZERO )
-			Ifc::LogMessage("Warning","Empty solid for:",operand2->entity);
+			Logger::Message(Logger::LOG_WARNING,"Empty solid for:",operand2->entity);
 	}
 
-	bool valid_cut = false;
-	if ( !is_bounded || !is_convex_bound ) {
+	const IfcSchema::IfcBooleanOperator::IfcBooleanOperator op = l->Operator();
+
+	if (op == IfcSchema::IfcBooleanOperator::IfcBooleanOperator_DIFFERENCE) {
+
+		bool valid_cut = false;
 		BRepAlgoAPI_Cut brep_cut(s1,s2);
 		if ( brep_cut.IsDone() ) {
 			TopoDS_Shape result = brep_cut;
+
+			ShapeFix_Shape fix(result);
+			try {
+				fix.Perform();
+				result = fix.Shape();
+			} catch (...) {
+				Logger::Message(Logger::LOG_WARNING, "Shape healing failed on boolean result", l->entity);
+			}
+		
 			bool is_valid = BRepCheck_Analyzer(result).IsValid() != 0;
 			if ( is_valid ) {
 				shape = result;
 				valid_cut = true;
 			} 
 		}
-		if ( !valid_cut && !is_bounded ) {
-			Ifc2x3::IfcHalfSpaceSolid::ptr ifc_halfspace = (Ifc2x3::IfcHalfSpaceSolid::ptr) operand2;
-			Ifc2x3::IfcSurface::ptr surface = ifc_halfspace->BaseSurface();
-			if ( surface->is(Ifc2x3::Type::IfcPlane) ) {
-				gp_Pln pln;
-				IfcGeom::convert(reinterpret_pointer_cast<Ifc2x3::IfcSurface,Ifc2x3::IfcPlane>(surface),pln);
-				gp_Pnt pnt = pln.Location();
-				bool reverse = ifc_halfspace->AgreementFlag();
-				gp_Vec direction = pln.Axis().Direction();
-				if ( reverse ) direction *= -1;
-				pnt.Translate(direction);
-				pln.SetLocation(pln.Location().Translated(direction * -0.0001));
-				TopoDS_Shape halfspace = BRepPrimAPI_MakeHalfSpace(BRepBuilderAPI_MakeFace(pln),pnt).Solid();
 
-				BRepAlgoAPI_Cut brep_cut(s1,halfspace);
-				if ( brep_cut.IsDone() ) {
-					TopoDS_Shape result = brep_cut;
-					bool is_valid = BRepCheck_Analyzer(result).IsValid() != 0;
-					if ( is_valid ) {
-						shape = result;
-						valid_cut = true;
-						Ifc::LogMessage("Warning","Slightly nudged the SecondOperand of:",l->entity);
-					} 
-				}
-			}
+		if ( valid_cut ) {
+			const double volume_after_subtraction = shape_volume(shape);
+			if ( ALMOST_THE_SAME(first_operand_volume,volume_after_subtraction) )
+				Logger::Message(Logger::LOG_WARNING,"Subtraction yields unchanged volume:",l->entity);
+		} else {
+			Logger::Message(Logger::LOG_ERROR,"Failed to process subtraction:",l->entity);
+			shape = s1;
 		}
-	} else {
-		Ifc2x3::IfcPolygonalBoundedHalfSpace::ptr ifc_bounded_halfspace = 
-			(Ifc2x3::IfcPolygonalBoundedHalfSpace::ptr) operand2;
-		gp_Trsf trsf;
-		convert(ifc_bounded_halfspace->Position(),trsf);
-		TopoDS_Shape face = BRepBuilderAPI_MakeFace(boundary_wire).Face();
-		TopoDS_Shape prism = BRepPrimAPI_MakePrism (boundary_wire,gp_Vec(0,0,1),1);
-		prism.Move(trsf);
-		face.Move(trsf);
 
-		gp_Pln pln = plane_from_face(TopoDS::Face(face));
-		gp_Pnt pnt = point_above_plane(pln,ifc_bounded_halfspace->AgreementFlag());
+		return true;
 
-		TopoDS_Shape halfspace;
-		Ifc2x3::IfcHalfSpaceSolid::ptr ifc_halfspace = (Ifc2x3::IfcHalfSpaceSolid::ptr) operand2;
-		if ( ! IfcGeom::convert(ifc_halfspace,halfspace) ) return false;
+	} else if (op == IfcSchema::IfcBooleanOperator::IfcBooleanOperator_UNION) {
 
-		TopoDS_Shape subtraction_volume = s1;
-		double subtraction_volume_volume = shape_volume(subtraction_volume);
+		BRepAlgoAPI_Fuse brep_fuse(s1,s2);
+		if ( brep_fuse.IsDone() ) {
+			TopoDS_Shape result = brep_fuse;
 
-		const double minimal_substraction_difference = subtraction_volume_volume * 0.0001;
+			ShapeFix_Shape fix(result);
+			fix.Perform();
+			result = fix.Shape();
+		
+			bool is_valid = BRepCheck_Analyzer(result).IsValid() != 0;
+			if ( is_valid ) {
+				shape = result;
+				return true;
+			} 
+		}	
 
-		BRepAlgoAPI_Common brep_common(subtraction_volume,halfspace);
+	} else if (op == IfcSchema::IfcBooleanOperator::IfcBooleanOperator_INTERSECTION) {
+
+		BRepAlgoAPI_Common brep_common(s1,s2);
 		if ( brep_common.IsDone() ) {
-			TopoDS_Shape brep_common_shape = brep_common;
-			bool is_valid = BRepCheck_Analyzer(brep_common_shape).IsValid() != 0;
-			double new_subtraction_volume_volume = shape_volume(brep_common_shape);
-			double subtraction_volume_difference = subtraction_volume_volume - new_subtraction_volume_volume;
-			if ( is_valid && subtraction_volume_difference > minimal_substraction_difference ) {
-				subtraction_volume = brep_common_shape;
-				subtraction_volume_volume = new_subtraction_volume_volume;
-			}
-		}
+			TopoDS_Shape result = brep_common;
 
-		TopExp_Explorer exp(prism,TopAbs_FACE);
-		while ( exp.More() ) {
-			TopoDS_Shape halfspace = halfspace_from_plane(plane_from_face(TopoDS::Face(exp.Current())),pnt);
-			BRepAlgoAPI_Common brep_common(subtraction_volume,halfspace);
-			if ( brep_common.IsDone() ) {
-				TopoDS_Shape brep_common_shape = brep_common;
-				bool is_valid = BRepCheck_Analyzer(brep_common_shape).IsValid() != 0;
-				double new_subtraction_volume_volume = shape_volume(brep_common_shape);
-				double subtraction_volume_difference = subtraction_volume_volume - new_subtraction_volume_volume;
-				if ( is_valid && subtraction_volume_difference > minimal_substraction_difference ) {
-					subtraction_volume = brep_common_shape;
-					subtraction_volume_volume = new_subtraction_volume_volume;
-				}
-			}
-			exp.Next();
-		}
-
-		BRepAlgoAPI_Cut brep_cut(s1,subtraction_volume);
-		if ( brep_cut.IsDone() ) {
-			TopoDS_Shape result = brep_cut;
+			ShapeFix_Shape fix(result);
+			fix.Perform();
+			result = fix.Shape();
+		
 			bool is_valid = BRepCheck_Analyzer(result).IsValid() != 0;
 			if ( is_valid ) {
 				shape = result;
-				valid_cut = true;
+				return true;
 			} 
 		}
+
 	}
-
-	if ( valid_cut ) {
-		const double volume_after_subtraction = shape_volume(shape);
-		if ( ALMOST_THE_SAME(first_operand_volume,volume_after_subtraction) )
-			Ifc::LogMessage("Warning","Subtraction yields unchanged volume:",l->entity);
-	} else {
-		Ifc::LogMessage("Error","Failed to process subtraction:",l->entity);
-		shape = s1;
-	}
-
-	return true;
-
+	return false;
 }
-bool IfcGeom::convert(const Ifc2x3::IfcConnectedFaceSet::ptr l, TopoDS_Shape& shape) {
-	Ifc2x3::IfcFace::list faces = l->CfsFaces();
+
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcConnectedFaceSet* l, TopoDS_Shape& shape) {
+	IfcSchema::IfcFace::list::ptr faces = l->CfsFaces();
 	bool facesAdded = false;
-	const unsigned int num_faces = faces->Size();
-	if ( Ifc::SewShells && num_faces < MAX_FACES_TO_SEW ) {
+	const unsigned int num_faces = faces->size();
+	bool valid_shell = false;
+	if ( num_faces < getValue(GV_MAX_FACES_TO_SEW) ) {
 		BRepOffsetAPI_Sewing builder;
-		builder.SetTolerance(POINT_EQUALITY_TOLERANCE);
-		builder.SetMaxTolerance(POINT_EQUALITY_TOLERANCE);
-		builder.SetMinTolerance(POINT_EQUALITY_TOLERANCE);
-		for( Ifc2x3::IfcFace::it it = faces->begin(); it != faces->end(); ++ it ) {
+		builder.SetTolerance(getValue(GV_POINT_EQUALITY_TOLERANCE));
+		builder.SetMaxTolerance(getValue(GV_POINT_EQUALITY_TOLERANCE));
+		builder.SetMinTolerance(getValue(GV_POINT_EQUALITY_TOLERANCE));
+		for( IfcSchema::IfcFace::list::it it = faces->begin(); it != faces->end(); ++ it ) {
 			TopoDS_Face face;
-			if ( IfcGeom::convert_face(*it,face) && face_area(face) > MINIMAL_FACE_AREA ) {
+			bool converted_face = false;
+			try {
+				converted_face = convert_face(*it,face);
+			} catch (...) {}
+			if ( converted_face && face_area(face) > getValue(GV_MINIMAL_FACE_AREA) ) {
 				builder.Add(face);
 				facesAdded = true;
 			} else {
-				Ifc::LogMessage("Warning","Invalid face:",(*it)->entity);
+				Logger::Message(Logger::LOG_WARNING,"Invalid face:",(*it)->entity);
 			}
 		}
 		if ( ! facesAdded ) return false;
-		builder.Perform();
-		shape = builder.SewedShape();
 		try {
-			ShapeFix_Solid solid;
-			solid.LimitTolerance(POINT_EQUALITY_TOLERANCE);
-			shape = solid.SolidFromShell(TopoDS::Shell(shape));
+			builder.Perform();
+			shape = builder.SewedShape();
+			valid_shell = BRepCheck_Analyzer(shape).IsValid();
 		} catch(...) {}
-	} else {
+		if (valid_shell) {
+			try {
+				ShapeFix_Solid solid;
+				solid.LimitTolerance(getValue(GV_POINT_EQUALITY_TOLERANCE));
+				TopoDS_Solid solid_shape = solid.SolidFromShell(TopoDS::Shell(shape));
+				if (!solid_shape.IsNull()) {
+					try {
+						BRepClass3d_SolidClassifier classifier(solid_shape);
+						shape = solid_shape;
+					} catch (...) {}
+				}
+			} catch(...) {}
+		} else {
+			Logger::Message(Logger::LOG_WARNING,"Failed to sew faceset:",l->entity);
+		}
+	}
+	if (!valid_shell) {
 		TopoDS_Compound compound;
 		BRep_Builder builder;
 		builder.MakeCompound(compound);
-		for( Ifc2x3::IfcFace::it it = faces->begin(); it != faces->end(); ++ it ) {
+		for( IfcSchema::IfcFace::list::it it = faces->begin(); it != faces->end(); ++ it ) {
 			TopoDS_Face face;
-			if ( IfcGeom::convert_face(*it,face) && face_area(face) > MINIMAL_FACE_AREA ) {
+			bool converted_face = false;
+			try {
+				converted_face = convert_face(*it,face);
+			} catch (...) {}
+			if ( converted_face && face_area(face) > getValue(GV_MINIMAL_FACE_AREA) ) {
 				builder.Add(compound,face);
 				facesAdded = true;
 			} else {
-				Ifc::LogMessage("Warning","Invalid face:",(*it)->entity);
+				Logger::Message(Logger::LOG_WARNING,"Invalid face:",(*it)->entity);
 			}
 		}
 		if ( ! facesAdded ) return false;
@@ -334,53 +457,362 @@ bool IfcGeom::convert(const Ifc2x3::IfcConnectedFaceSet::ptr l, TopoDS_Shape& sh
 	}
 	return true;
 }
-bool IfcGeom::convert(const Ifc2x3::IfcMappedItem::ptr l, ShapeList& shapes) {
+
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcMappedItem* l, IfcRepresentationShapeItems& shapes) {
 	gp_GTrsf gtrsf;
-	Ifc2x3::IfcCartesianTransformationOperator::ptr transform = l->MappingTarget();
-	if ( transform->is(Ifc2x3::Type::IfcCartesianTransformationOperator3DnonUniform) ) {
-		IfcGeom::convert(reinterpret_pointer_cast<Ifc2x3::IfcCartesianTransformationOperator,
-			Ifc2x3::IfcCartesianTransformationOperator3DnonUniform>(transform),gtrsf);
-	} else if ( transform->is(Ifc2x3::Type::IfcCartesianTransformationOperator2DnonUniform) ) {
+	IfcSchema::IfcCartesianTransformationOperator* transform = l->MappingTarget();
+	if ( transform->is(IfcSchema::Type::IfcCartesianTransformationOperator3DnonUniform) ) {
+		IfcGeom::Kernel::convert((IfcSchema::IfcCartesianTransformationOperator3DnonUniform*)transform,gtrsf);
+	} else if ( transform->is(IfcSchema::Type::IfcCartesianTransformationOperator2DnonUniform) ) {
+		Logger::Message(Logger::LOG_ERROR, "Unsupported MappingTarget:", transform->entity);
 		return false;
-	} else if ( transform->is(Ifc2x3::Type::IfcCartesianTransformationOperator3D) ) {
+	} else if ( transform->is(IfcSchema::Type::IfcCartesianTransformationOperator3D) ) {
 		gp_Trsf trsf;
-		IfcGeom::convert(reinterpret_pointer_cast<Ifc2x3::IfcCartesianTransformationOperator,
-			Ifc2x3::IfcCartesianTransformationOperator3D>(transform),trsf);
+		IfcGeom::Kernel::convert((IfcSchema::IfcCartesianTransformationOperator3D*)transform,trsf);
 		gtrsf = trsf;
-	} else if ( transform->is(Ifc2x3::Type::IfcCartesianTransformationOperator2D) ) {
+	} else if ( transform->is(IfcSchema::Type::IfcCartesianTransformationOperator2D) ) {
 		gp_Trsf2d trsf_2d;
-		IfcGeom::convert(reinterpret_pointer_cast<Ifc2x3::IfcCartesianTransformationOperator,
-			Ifc2x3::IfcCartesianTransformationOperator2D>(transform),trsf_2d);
+		IfcGeom::Kernel::convert((IfcSchema::IfcCartesianTransformationOperator2D*)transform,trsf_2d);
 		gtrsf = (gp_Trsf) trsf_2d;
 	}
-	Ifc2x3::IfcRepresentationMap::ptr map = l->MappingSource();
-	Ifc2x3::IfcAxis2Placement placement = map->MappingOrigin();
+	IfcSchema::IfcRepresentationMap* map = l->MappingSource();
+	IfcSchema::IfcAxis2Placement* placement = map->MappingOrigin();
 	gp_Trsf trsf;
-	if (placement->is(Ifc2x3::Type::IfcAxis2Placement3D)) {
-		IfcGeom::convert((Ifc2x3::IfcAxis2Placement3D*)placement,trsf);
+	if (placement->is(IfcSchema::Type::IfcAxis2Placement3D)) {
+		IfcGeom::Kernel::convert((IfcSchema::IfcAxis2Placement3D*)placement,trsf);
 	} else {
 		gp_Trsf2d trsf_2d;
-		IfcGeom::convert((Ifc2x3::IfcAxis2Placement2D*)placement,trsf_2d);
+		IfcGeom::Kernel::convert((IfcSchema::IfcAxis2Placement2D*)placement,trsf_2d);
 		trsf = trsf_2d;
 	}
 	gtrsf.Multiply(trsf);
 	const unsigned int previous_size = (const unsigned int) shapes.size();
-	bool b = IfcGeom::convert_shapes(map->MappedRepresentation(),shapes);
+	bool b = convert_shapes(map->MappedRepresentation(),shapes);
 	for ( unsigned int i = previous_size; i < shapes.size(); ++ i ) {
-		shapes[i].first->Multiply(gtrsf);
+		shapes[i].append(gtrsf);
 	}
 	return b;
 }
-bool IfcGeom::convert(const Ifc2x3::IfcShapeRepresentation::ptr l, ShapeList& shapes) {
-	Ifc2x3::IfcRepresentationItem::list items = l->Items();
-	if ( ! items->Size() ) return false;
-	for ( Ifc2x3::IfcRepresentationItem::it it = items->begin(); it != items->end(); ++ it ) {
-		if ( IfcGeom::is_shape_collection(*it) ) IfcGeom::convert_shapes(*it,shapes);
-		else {
-			TopoDS_Shape s;
-			if ( const TopoDS_Shape* shape_id = IfcGeom::convert_shape(*it,s))
-				shapes.push_back(LocationShape(new gp_GTrsf(),shape_id));
+
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcShapeRepresentation* l, IfcRepresentationShapeItems& shapes) {
+	IfcSchema::IfcRepresentationItem::list::ptr items = l->Items();
+	bool part_succes = false;
+	if ( items->size() ) {
+		for ( IfcSchema::IfcRepresentationItem::list::it it = items->begin(); it != items->end(); ++ it ) {
+			IfcSchema::IfcRepresentationItem* representation_item = *it;
+			if ( is_shape_collection(representation_item) ) {
+				part_succes |= convert_shapes(*it, shapes);
+			} else {
+				TopoDS_Shape s;
+				if (convert_shape(representation_item,s)) {
+					shapes.push_back(IfcRepresentationShapeItem(s, get_style(representation_item)));
+					part_succes |= true;
+				}
+			}
 		}
 	}
+	return part_succes;
+}
+
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcGeometricSet* l, IfcRepresentationShapeItems& shapes) {
+	IfcEntityList::ptr elements = l->Elements();
+	if ( !elements->size() ) return false;
+	bool part_succes = false;
+	const IfcGeom::SurfaceStyle* parent_style = get_style(l);
+	for ( IfcEntityList::it it = elements->begin(); it != elements->end(); ++ it ) {
+		IfcSchema::IfcGeometricSetSelect* element = *it;
+		if (element->is(IfcSchema::Type::IfcSurface)) {
+			IfcSchema::IfcSurface* surface = (IfcSchema::IfcSurface*) element;
+			TopoDS_Shape s;
+			if (convert_shape(surface, s)) {
+				part_succes = true;
+				const IfcGeom::SurfaceStyle* style = get_style(surface);
+				shapes.push_back(IfcRepresentationShapeItem(s, style ? style : parent_style));
+			}
+		}
+	}
+	return part_succes;
+}
+
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcBlock* l, TopoDS_Shape& shape) {
+	const double dx = l->XLength() * getValue(GV_LENGTH_UNIT);
+	const double dy = l->YLength() * getValue(GV_LENGTH_UNIT);
+	const double dz = l->ZLength() * getValue(GV_LENGTH_UNIT);
+
+	BRepPrimAPI_MakeBox builder(dx, dy, dz);
+	gp_Trsf trsf;
+	IfcGeom::Kernel::convert(l->Position(),trsf);
+	shape = builder.Solid().Moved(trsf);
 	return true;
-}
+}
+
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcRectangularPyramid* l, TopoDS_Shape& shape) {
+	const double dx = l->XLength() * getValue(GV_LENGTH_UNIT);
+	const double dy = l->YLength() * getValue(GV_LENGTH_UNIT);
+	const double dz = l->Height() * getValue(GV_LENGTH_UNIT);
+	
+	BRepPrimAPI_MakeWedge builder(dx, dz, dy, dx / 2., dy / 2., dx / 2., dy / 2.);
+	
+	gp_Trsf trsf1, trsf2;
+	trsf2.SetValues(
+		1, 0, 0, 0,
+		0, 0, 1, 0,
+		0, 1, 0, 0
+#if OCC_VERSION_HEX < 0x60800
+		, Precision::Angular(), Precision::Confusion()
+#endif			
+	);
+	
+	IfcGeom::Kernel::convert(l->Position(), trsf1);
+	shape = BRepBuilderAPI_Transform(builder.Solid(), trsf1 * trsf2);
+	return true;
+}
+
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcRightCircularCylinder* l, TopoDS_Shape& shape) {
+	const double r = l->Radius() * getValue(GV_LENGTH_UNIT);
+	const double h = l->Height() * getValue(GV_LENGTH_UNIT);
+
+	BRepPrimAPI_MakeCylinder builder(r, h);
+	gp_Trsf trsf;
+	IfcGeom::Kernel::convert(l->Position(),trsf);
+	shape = builder.Solid().Moved(trsf);
+	return true;
+}
+
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcRightCircularCone* l, TopoDS_Shape& shape) {
+	const double r = l->BottomRadius() * getValue(GV_LENGTH_UNIT);
+	const double h = l->Height() * getValue(GV_LENGTH_UNIT);
+
+	BRepPrimAPI_MakeCone builder(r, 0., h);
+	gp_Trsf trsf;
+	IfcGeom::Kernel::convert(l->Position(),trsf);
+	shape = builder.Solid().Moved(trsf);
+	return true;
+}
+
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcSphere* l, TopoDS_Shape& shape) {
+	const double r = l->Radius() * getValue(GV_LENGTH_UNIT);
+	
+	BRepPrimAPI_MakeSphere builder(r);
+	gp_Trsf trsf;
+	IfcGeom::Kernel::convert(l->Position(),trsf);
+	shape = builder.Solid().Moved(trsf);
+	return true;
+}
+
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcCsgSolid* l, TopoDS_Shape& shape) {
+	return convert_shape(l->TreeRootExpression(), shape);
+}
+
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcCurveBoundedPlane* l, TopoDS_Shape& face) {
+	gp_Pln pln;
+	IfcGeom::Kernel::convert(l->BasisSurface(), pln);
+
+	gp_Trsf trsf;
+	trsf.SetTransformation(pln.Position());
+	
+	TopoDS_Wire outer;
+	convert_wire(l->OuterBoundary(), outer);
+	
+	BRepBuilderAPI_MakeFace mf (outer);
+	mf.Add(outer);
+
+	IfcSchema::IfcCurve::list::ptr inner = l->InnerBoundaries();
+
+	for (IfcSchema::IfcCurve::list::it it = inner->begin(); it != inner->end(); ++it) {
+		TopoDS_Wire inner;
+		convert_wire(*it, inner);
+		
+		mf.Add(inner);
+	}
+
+	ShapeFix_Shape sfs(mf.Face());
+	sfs.Perform();
+	face = TopoDS::Face(sfs.Shape()).Moved(trsf);
+	
+	return true;
+}
+
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcRectangularTrimmedSurface* l, TopoDS_Shape& face) {
+	if (!l->BasisSurface()->is(IfcSchema::Type::IfcPlane)) {
+		Logger::Message(Logger::LOG_ERROR, "Unsupported BasisSurface:", l->BasisSurface()->entity);
+		return false;
+	}
+	gp_Pln pln;
+	IfcGeom::Kernel::convert((IfcSchema::IfcPlane*) l->BasisSurface(), pln);
+
+	BRepBuilderAPI_MakeFace mf(pln, l->U1(), l->U2(), l->V1(), l->V2());
+
+	face = mf.Face();
+
+	return true;
+}
+
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcSurfaceCurveSweptAreaSolid* l, TopoDS_Shape& shape) {
+	gp_Trsf directrix, position;
+	TopoDS_Shape face;
+	TopoDS_Wire wire, section;
+
+	if (!l->ReferenceSurface()->is(IfcSchema::Type::IfcPlane)) {
+		Logger::Message(Logger::LOG_WARNING, "Reference surface not supported", l->ReferenceSurface()->entity);
+		return false;
+	}
+	
+	if (!IfcGeom::Kernel::convert(l->Position(), position)   || 
+		!convert_face(l->SweptArea(), face) || 
+		!convert_wire(l->Directrix(), wire)    ) {
+		return false;
+	}
+
+	gp_Pln pln;
+	gp_Pnt directrix_origin;
+	gp_Vec directrix_tangent;
+	bool directrix_on_plane = true;
+	IfcGeom::Kernel::convert((IfcSchema::IfcPlane*) l->ReferenceSurface(), pln);
+
+	// As per Informal propositions 2: The Directrix shall lie on the ReferenceSurface.
+	// This is not always the case with the test files in the repository. I am not sure
+	// how to deal with this and whether my interpretation of the propositions is
+	// correct. However, if it has been asserted that the vertices of the directrix do
+	// not conform to the ReferenceSurface, the ReferenceSurface is ignored.
+	{ 
+		for (TopExp_Explorer exp(wire, TopAbs_VERTEX); exp.More(); exp.Next()) {
+			if (pln.Distance(BRep_Tool::Pnt(TopoDS::Vertex(exp.Current()))) > ALMOST_ZERO) {
+				directrix_on_plane = false;
+				Logger::Message(Logger::LOG_WARNING, "The Directrix does not lie on the ReferenceSurface", l->entity);
+				break;
+			}
+		}
+	}
+
+	{ 
+		TopExp_Explorer exp(wire, TopAbs_EDGE);
+		TopoDS_Edge edge = TopoDS::Edge(exp.Current());
+		double u0, u1;
+		Handle(Geom_Curve) crv = BRep_Tool::Curve(edge, u0, u1);
+		crv->D1(u0, directrix_origin, directrix_tangent);
+	}
+
+	if (pln.Axis().Direction().IsNormal(directrix_tangent, Precision::Approximation()) && directrix_on_plane) {
+		directrix.SetTransformation(gp_Ax3(directrix_origin, directrix_tangent, pln.Axis().Direction()), gp::XOY());
+	} else {
+		directrix.SetTransformation(gp_Ax3(directrix_origin, directrix_tangent), gp::XOY());
+	}
+	face = BRepBuilderAPI_Transform(face, directrix);
+
+	// NB: Note that StartParam and EndParam param are ignored and the assumption is
+	// made that the parametric range over which to be swept matches the IfcCurve in
+	// its entirety.
+	BRepOffsetAPI_MakePipeShell builder(wire);
+
+	{ TopExp_Explorer exp(face, TopAbs_WIRE);
+	section = TopoDS::Wire(exp.Current()); }
+
+	builder.Add(section);
+	builder.SetTransitionMode(BRepBuilderAPI_RightCorner);
+	if (directrix_on_plane) {
+		builder.SetMode(pln.Axis().Direction());
+	}
+	builder.Build();
+	builder.MakeSolid();
+	shape = builder.Shape();
+	shape.Move(position);
+
+	return true;
+}
+
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcSweptDiskSolid* l, TopoDS_Shape& shape) {
+	TopoDS_Wire wire, section1, section2;
+
+	bool hasInnerRadius = l->InnerRadius() ? true : false;
+
+	if (!convert_wire(l->Directrix(), wire)) {
+		return false;
+	}
+	
+	gp_Ax2 directrix;
+	{
+		gp_Pnt directrix_origin;
+		gp_Vec directrix_tangent;
+		TopExp_Explorer exp(wire, TopAbs_EDGE);
+		TopoDS_Edge edge = TopoDS::Edge(exp.Current());
+		double u0, u1;
+		Handle(Geom_Curve) crv = BRep_Tool::Curve(edge, u0, u1);
+		crv->D1(u0, directrix_origin, directrix_tangent);
+		directrix = gp_Ax2(directrix_origin, directrix_tangent);
+	}
+
+	const double r1 = l->Radius() * getValue(GV_LENGTH_UNIT);
+	Handle(Geom_Circle) circle = new Geom_Circle(directrix, r1);
+	section1 = BRepBuilderAPI_MakeWire(BRepBuilderAPI_MakeEdge(circle));
+
+	if (hasInnerRadius) {
+		const double r2 = (*l->InnerRadius()) * getValue(GV_LENGTH_UNIT);
+		if (r2 < getValue(GV_PRECISION)) {
+			// Subtraction of pipes with small radii is unstable.
+			hasInnerRadius = false;
+		} else {
+			Handle(Geom_Circle) circle = new Geom_Circle(directrix, r2);
+			section2 = BRepBuilderAPI_MakeWire(BRepBuilderAPI_MakeEdge(circle));
+		}
+	}
+
+	// NB: Note that StartParam and EndParam param are ignored and the assumption is
+	// made that the parametric range over which to be swept matches the IfcCurve in
+	// its entirety.
+	// NB2: Contrary to IfcSurfaceCurveSweptAreaSolid the transition mode has been
+	// set to create round corners as this has proven to work better with the types
+	// of directrices encountered, which do not necessarily conform to a surface.
+	{ BRepOffsetAPI_MakePipeShell builder(wire);
+	builder.Add(section1);
+	builder.SetTransitionMode(BRepBuilderAPI_RoundCorner);
+	builder.Build();
+	builder.MakeSolid();
+	shape = builder.Shape(); }
+
+	if (hasInnerRadius) {
+		BRepOffsetAPI_MakePipeShell builder(wire);
+		builder.Add(section2);
+		builder.SetTransitionMode(BRepBuilderAPI_RoundCorner);
+		builder.Build();
+		builder.MakeSolid();
+		TopoDS_Shape inner = builder.Shape();
+
+		BRepAlgoAPI_Cut brep_cut(shape, inner);
+		bool is_valid = false;
+		if (brep_cut.IsDone()) {
+			TopoDS_Shape result = brep_cut;
+
+			ShapeFix_Shape fix(result);
+			fix.Perform();
+			result = fix.Shape();
+		
+			is_valid = BRepCheck_Analyzer(result).IsValid() != 0;
+			if (is_valid) {
+				shape = result;
+			}
+		}
+
+		if (!is_valid) {
+			Logger::Message(Logger::LOG_WARNING, "Failed to subtract inner radius void for:", l->entity);
+		}
+	}
+
+	return true;
+}
+
+#ifdef USE_IFC4
+
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcCylindricalSurface* l, TopoDS_Shape& face) {
+	gp_Trsf trsf;
+	IfcGeom::Kernel::convert(l->Position(),trsf);
+	
+	face = BRepBuilderAPI_MakeFace(new Geom_CylindricalSurface(gp::XOY(), l->Radius()), getValue(GV_PRECISION)).Face().Moved(trsf);
+	return true;
+}
+
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcAdvancedBrep* l, TopoDS_Shape& shape) {
+	return convert(l->Outer(), shape);
+}
+
+#endif

src/ifcgeom/IfcGeomWires.cpp

@@ -1,4 +1,4 @@
-/********************************************************************************
+/********************************************************************************
  *                                                                              *
  * This file is part of IfcOpenShell.                                           *
  *                                                                              *
@@ -47,15 +47,18 @@
 #include <TColgp_Array1OfPnt2d.hxx>
 #include <TColStd_Array1OfReal.hxx>
 #include <TColStd_Array1OfInteger.hxx>
+
 #include <Geom_Line.hxx>
 #include <Geom_Circle.hxx>
 #include <Geom_Ellipse.hxx>
 #include <Geom_TrimmedCurve.hxx>
 
-#include <BRepOffsetAPI_Sewing.hxx>
+#include <BRepBuilderAPI_MakeVertex.hxx>
 #include <BRepBuilderAPI_MakeFace.hxx>
 #include <BRepBuilderAPI_MakeEdge.hxx>
 #include <BRepBuilderAPI_MakeWire.hxx>
+#include <BRepBuilderAPI_MakeShell.hxx>
+#include <BRepBuilderAPI_MakeSolid.hxx>
 #include <BRepBuilderAPI_MakePolygon.hxx>
 #include <BRepBuilderAPI_MakeVertex.hxx>
 
@@ -63,61 +66,92 @@
 #include <TopoDS_Wire.hxx>
 #include <TopoDS_Face.hxx>
 #include <TopExp_Explorer.hxx>
+#include <TopLoc_Location.hxx>
+#include <TopTools_ListOfShape.hxx>
 
-#include <BRepPrimAPI_MakePrism.hxx>
-#include <BRepBuilderAPI_MakeShell.hxx>
-#include <BRepBuilderAPI_MakeSolid.hxx>
-#include <BRepPrimAPI_MakeHalfSpace.hxx>
 #include <BRepAlgoAPI_Cut.hxx>
+#include <BRepOffsetAPI_Sewing.hxx>
+#include <BRepPrimAPI_MakePrism.hxx>
+#include <BRepPrimAPI_MakeHalfSpace.hxx>
+#include <BRepFilletAPI_MakeFillet2d.hxx>
+
+#include <BRep_Tool.hxx>
 
 #include <ShapeFix_Shape.hxx>
 #include <ShapeFix_ShapeTolerance.hxx>
 #include <ShapeFix_Solid.hxx>
 
-#include <BRepFilletAPI_MakeFillet2d.hxx>
-
-#include <TopLoc_Location.hxx>
-
-#include <BRep_Tool.hxx>
-
 #include "../ifcgeom/IfcGeom.h"
 
-bool IfcGeom::convert(const Ifc2x3::IfcCompositeCurve::ptr l, TopoDS_Wire& wire) {
-	if ( ! Ifc::hasPlaneAngleUnit ) {
-		Ifc::LogMessage("Warning","Creating a composite curve without unit information:",l->entity);
-		Ifc::hasPlaneAngleUnit = true;
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcCompositeCurve* l, TopoDS_Wire& wire) {
+	if ( getValue(GV_PLANEANGLE_UNIT)<0 ) {
+		Logger::Message(Logger::LOG_WARNING,"Creating a composite curve without unit information:",l->entity);
+
+		// Temporarily pretend we do have unit information
+		setValue(GV_PLANEANGLE_UNIT,1.0);
+		
+		bool succes_radians = false;
+        bool succes_degrees = false;
+        bool use_radians = false;
+        bool use_degrees = false;
+
 		// First try radians
-		Ifc::PlaneAngleUnit = 1.0f;
-		bool succes_radians = IfcGeom::convert(l,wire);
-		bool succes_degrees;
-		if ( succes_radians ) {
-			Ifc::LogMessage("Notice","Used radians to create composite curve");
-		} else {
-			// Now try degrees
-			Ifc::PlaneAngleUnit = 0.0174532925199433f;
-			succes_degrees = IfcGeom::convert(l,wire);
-			if ( succes_degrees ) {
-				Ifc::LogMessage("Notice","Used degrees to create composite curve");
+		TopoDS_Wire wire_radians, wire_degrees;
+        try {
+		    succes_radians = IfcGeom::Kernel::convert(l,wire_radians);
+        } catch (...) {}
+
+		// Now try degrees
+		setValue(GV_PLANEANGLE_UNIT,0.0174532925199433);
+        try {
+		    succes_degrees = IfcGeom::Kernel::convert(l,wire_degrees);
+        } catch (...) {}
+
+		// Restore to unknown unit state
+		setValue(GV_PLANEANGLE_UNIT,-1.0);
+
+		if ( succes_degrees && ! succes_radians ) {
+			use_degrees = true;
+		} else if ( succes_radians && ! succes_degrees ) {
+			use_radians = true;
+		} else if ( succes_radians && succes_degrees ) {
+			if ( wire_degrees.Closed() && ! wire_radians.Closed() ) {
+				use_degrees = true;
+			} else if ( wire_radians.Closed() && ! wire_degrees.Closed() ) {
+				use_radians = true;
+			} else {
+				// No heuristic left to prefer the one over the other,
+				// apparently both variants are equally succesful.
+				// The curve might be composed of only straight segments.
+				// Let's go with the wire created using radians as that
+				// at least is a SI unit.
+				use_radians = true;
 			}
-			// Restore to radians
-			Ifc::PlaneAngleUnit = 1.0f;
 		}
-		Ifc::hasPlaneAngleUnit = false;
-		return succes_radians || succes_degrees;
+
+		if ( use_radians ) {
+			Logger::Message(Logger::LOG_NOTICE,"Used radians to create composite curve");
+            wire = wire_radians;
+		} else if ( use_degrees ) {
+			Logger::Message(Logger::LOG_NOTICE,"Used degrees to create composite curve");
+            wire = wire_degrees;
+		}
+
+		return use_radians || use_degrees;
 	}
-	Ifc2x3::IfcCompositeCurveSegment::list segments = l->Segments();
+	IfcSchema::IfcCompositeCurveSegment::list::ptr segments = l->Segments();
 	BRepBuilderAPI_MakeWire w;
 	//TopoDS_Vertex last_vertex;
-	for( Ifc2x3::IfcCompositeCurveSegment::it it = segments->begin(); it != segments->end(); ++ it ) {
-		const Ifc2x3::IfcCurve::ptr curve = (*it)->ParentCurve();
+	for( IfcSchema::IfcCompositeCurveSegment::list::it it = segments->begin(); it != segments->end(); ++ it ) {
+		IfcSchema::IfcCurve* curve = (*it)->ParentCurve();
 		TopoDS_Wire wire2;
-		if ( ! IfcGeom::convert_wire(curve,wire2) ) {
-			Ifc::LogMessage("Error","Failed to convert curve:",curve->entity);
+		if ( !convert_wire(curve,wire2) ) {
+			Logger::Message(Logger::LOG_ERROR,"Failed to convert curve:",curve->entity);
 			continue;
 		}
 		if ( ! (*it)->SameSense() ) wire2.Reverse();
 		ShapeFix_ShapeTolerance FTol;
-		FTol.SetTolerance(wire2, WIRE_CREATION_TOLERANCE, TopAbs_WIRE);
+		FTol.SetTolerance(wire2, getValue(GV_WIRE_CREATION_TOLERANCE), TopAbs_WIRE);
 		/*if ( it != segments->begin() ) {
 			TopExp_Explorer exp (wire2,TopAbs_VERTEX);
 			const TopoDS_Vertex& first_vertex = TopoDS::Vertex(exp.Current());
@@ -131,107 +165,273 @@ bool IfcGeom::convert(const Ifc2x3::IfcCompositeCurve::ptr l, TopoDS_Wire& wire)
 		w.Add(wire2);
 		//last_vertex = w.Vertex();
 		if ( w.Error() != BRepBuilderAPI_WireDone ) {
-			Ifc::LogMessage("Error","Failed to join curve segments:",l->entity);
+			Logger::Message(Logger::LOG_ERROR,"Failed to join curve segments:",l->entity);
 			return false;
 		}
 	}
 	wire = w.Wire();
 	return true;
 }
-bool IfcGeom::convert(const Ifc2x3::IfcTrimmedCurve::ptr l, TopoDS_Wire& wire) {
-	Ifc2x3::IfcCurve::ptr basis_curve = l->BasisCurve();
-	bool isConic = basis_curve->is(Ifc2x3::Type::IfcConic);
-	double parameterFactor = isConic ? Ifc::PlaneAngleUnit : Ifc::LengthUnit;
+
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcTrimmedCurve* l, TopoDS_Wire& wire) {
+	IfcSchema::IfcCurve* basis_curve = l->BasisCurve();
+	bool isConic = basis_curve->is(IfcSchema::Type::IfcConic);
+	double parameterFactor = isConic ? getValue(GV_PLANEANGLE_UNIT) : getValue(GV_LENGTH_UNIT);
 	Handle(Geom_Curve) curve;
-	if ( ! IfcGeom::convert_curve(basis_curve,curve) ) return false;
-	bool trim_cartesian = l->MasterRepresentation() == Ifc2x3::IfcTrimmingPreference::IfcTrimmingPreference_CARTESIAN;
-	IfcUtil::IfcAbstractSelect::list trims1 = l->Trim1();
-	IfcUtil::IfcAbstractSelect::list trims2 = l->Trim2();
+	if ( !convert_curve(basis_curve,curve) ) return false;
+	bool trim_cartesian = l->MasterRepresentation() == IfcSchema::IfcTrimmingPreference::IfcTrimmingPreference_CARTESIAN;
+	IfcEntityList::ptr trims1 = l->Trim1();
+	IfcEntityList::ptr trims2 = l->Trim2();
 	bool trimmed1 = false;
 	bool trimmed2 = false;
-	bool sense_agreement = l->SenseAgreement();
-	double flt1;
-	gp_Pnt pnt1;
+	unsigned sense_agreement = l->SenseAgreement() ? 0 : 1;
+	double flts[2];
+	gp_Pnt pnts[2];
+	bool has_flts[2] = {false,false};
+	bool has_pnts[2] = {false,false};
 	BRepBuilderAPI_MakeWire w;
-	for ( IfcUtil::IfcAbstractSelect::it it = trims1->begin(); it != trims1->end(); it ++ ) {
-		const IfcUtil::IfcAbstractSelect::ptr i = *it;
-		if ( i->is(Ifc2x3::Type::IfcCartesianPoint) && trim_cartesian ) {
-			IfcGeom::convert(reinterpret_pointer_cast<IfcUtil::IfcAbstractSelect,Ifc2x3::IfcCartesianPoint>(i), pnt1 );
-			trimmed1 = true;
-		} else if ( i->is(Ifc2x3::Type::IfcParameterValue) && !trim_cartesian ) {
-			const double value = *reinterpret_pointer_cast<IfcUtil::IfcAbstractSelect,IfcUtil::IfcArgumentSelect>(i)->wrappedValue();
-			flt1 = value * parameterFactor;
-			trimmed1 = true;
+	for ( IfcEntityList::it it = trims1->begin(); it != trims1->end(); it ++ ) {
+		IfcUtil::IfcBaseClass* i = *it;
+		if ( i->is(IfcSchema::Type::IfcCartesianPoint) ) {
+			IfcGeom::Kernel::convert((IfcSchema::IfcCartesianPoint*)i, pnts[sense_agreement] );
+			has_pnts[sense_agreement] = true;
+		} else if ( i->is(IfcSchema::Type::IfcParameterValue) ) {
+			const double value = *((IfcSchema::IfcParameterValue*)i);
+			flts[sense_agreement] = value * parameterFactor;
+			has_flts[sense_agreement] = true;
 		}
 	}
-	for ( IfcUtil::IfcAbstractSelect::it it = trims2->begin(); it != trims2->end(); it ++ ) {
-		const IfcUtil::IfcAbstractSelect::ptr i = *it;
-		if ( i->is(Ifc2x3::Type::IfcCartesianPoint) && trim_cartesian && trimmed1 ) {
-			gp_Pnt pnt2;
-			IfcGeom::convert(reinterpret_pointer_cast<IfcUtil::IfcAbstractSelect,Ifc2x3::IfcCartesianPoint>(i), pnt2 );
-			BRepBuilderAPI_MakeEdge e (curve,sense_agreement ? pnt1 : pnt2,sense_agreement ? pnt2 : pnt1);
-			if ( ! e.IsDone() ) {
-				BRepBuilderAPI_EdgeError err = e.Error();
-				if ( err == BRepBuilderAPI_PointProjectionFailed ) {
-					w.Add(BRepBuilderAPI_MakeEdge(sense_agreement ? pnt1 : pnt2,sense_agreement ? pnt2 : pnt1));
-					Ifc::LogMessage("Warning","Point projection failed for:",l->entity);
-				}
-			} else {
-				w.Add(e.Edge());
-			}
-			trimmed2 = true;
-			break;
-		} else if ( i->is(Ifc2x3::Type::IfcParameterValue) && !trim_cartesian && trimmed1 ) {
-			const double value = *reinterpret_pointer_cast<IfcUtil::IfcAbstractSelect,IfcUtil::IfcArgumentSelect>(i)->wrappedValue();
-			double flt2 = value * parameterFactor;
-			if ( isConic && ALMOST_THE_SAME(fmod(flt2-flt1,(double)(M_PI*2.0)),0.0f) ) {
-				w.Add(BRepBuilderAPI_MakeEdge(curve));
-			} else {
-				BRepBuilderAPI_MakeEdge e (curve,sense_agreement ? flt1 : flt2,sense_agreement ? flt2 : flt1);
-				w.Add(e.Edge());
-			}
-			trimmed2 = true;
-			break;
+	for ( IfcEntityList::it it = trims2->begin(); it != trims2->end(); it ++ ) {
+		IfcUtil::IfcBaseClass* i = *it;
+		if ( i->is(IfcSchema::Type::IfcCartesianPoint) ) {
+			IfcGeom::Kernel::convert((IfcSchema::IfcCartesianPoint*)i, pnts[1-sense_agreement] );
+			has_pnts[1-sense_agreement] = true;
+		} else if ( i->is(IfcSchema::Type::IfcParameterValue) ) {
+			const double value = *((IfcSchema::IfcParameterValue*)i);
+			flts[1-sense_agreement] = value * parameterFactor;
+			has_flts[1-sense_agreement] = true;
 		}
 	}
-	if ( trimmed2 ) wire = w.Wire();
-	return trimmed2;
+	trim_cartesian &= has_pnts[0] && has_pnts[1];
+	bool trim_cartesian_failed = !trim_cartesian;
+	if ( trim_cartesian ) {
+		if ( pnts[0].Distance(pnts[1]) < getValue(GV_WIRE_CREATION_TOLERANCE) ) {
+			Logger::Message(Logger::LOG_WARNING,"Skipping segment with length below tolerance level:",l->entity);
+			return false;
+		}
+		ShapeFix_ShapeTolerance FTol;
+		TopoDS_Vertex v1 = BRepBuilderAPI_MakeVertex(pnts[0]);
+		TopoDS_Vertex v2 = BRepBuilderAPI_MakeVertex(pnts[1]);
+		FTol.SetTolerance(v1, getValue(GV_WIRE_CREATION_TOLERANCE), TopAbs_VERTEX);
+		FTol.SetTolerance(v2, getValue(GV_WIRE_CREATION_TOLERANCE), TopAbs_VERTEX);
+		BRepBuilderAPI_MakeEdge e (curve,v1,v2);
+		if ( ! e.IsDone() ) {
+			BRepBuilderAPI_EdgeError err = e.Error();
+			if ( err == BRepBuilderAPI_PointProjectionFailed ) {
+				Logger::Message(Logger::LOG_WARNING,"Point projection failed for:",l->entity);
+				trim_cartesian_failed = true;
+			}
+		} else {
+			w.Add(e.Edge());
+		}
+	}
+	if ( (!trim_cartesian || trim_cartesian_failed) && (has_flts[0] && has_flts[1]) ) {
+		// The Geom_Line is constructed from a gp_Pnt and gp_Dir, whereas the IfcLine
+		// is defined by an IfcCartesianPoint and an IfcVector with Magnitude. Because
+		// the vector is normalised when passed to Geom_Line constructor the magnitude
+		// needs to be factored in with the IfcParameterValue here.
+		if ( basis_curve->is(IfcSchema::Type::IfcLine) ) {
+			IfcSchema::IfcLine* line = static_cast<IfcSchema::IfcLine*>(basis_curve);
+			const double magnitude = line->Dir()->Magnitude();
+			flts[0] *= magnitude; flts[1] *= magnitude;
+		}
+		if ( basis_curve->is(IfcSchema::Type::IfcEllipse) ) {
+			IfcSchema::IfcEllipse* ellipse = static_cast<IfcSchema::IfcEllipse*>(basis_curve);
+			double x = ellipse->SemiAxis1() * getValue(GV_LENGTH_UNIT);
+			double y = ellipse->SemiAxis2() * getValue(GV_LENGTH_UNIT);
+			const bool rotated = y > x;
+			if (rotated) {
+				flts[0] -= M_PI / 2.;
+				flts[1] -= M_PI / 2.;
+			}
+		}
+		if ( isConic && ALMOST_THE_SAME(fmod(flts[1]-flts[0],(double)(M_PI*2.0)),0.0f) ) {
+			w.Add(BRepBuilderAPI_MakeEdge(curve));
+		} else {
+			BRepBuilderAPI_MakeEdge e (curve,flts[0],flts[1]);
+			w.Add(e.Edge());
+		}			
+	} else if ( trim_cartesian_failed && (has_pnts[0] && has_pnts[1]) ) {
+		w.Add(BRepBuilderAPI_MakeEdge(pnts[0],pnts[1]));
+	}
+	if ( w.IsDone() ) {
+		wire = w.Wire();
+		return true;
+	} else {
+		return false;
+	}
 }
-bool IfcGeom::convert(const Ifc2x3::IfcPolyline::ptr l, TopoDS_Wire& result) {
-	Ifc2x3::IfcCartesianPoint::list points = l->Points();
 
-	BRepBuilderAPI_MakeWire w;
-	gp_Pnt P1;gp_Pnt P2;
-	for( Ifc2x3::IfcCartesianPoint::it it = points->begin(); it != points->end(); ++ it ) {
-		IfcGeom::convert(*it,P2);
-		if ( it != points->begin() && ( !P1.IsEqual(P2,POINT_EQUALITY_TOLERANCE) ) )
-			w.Add(BRepBuilderAPI_MakeEdge(P1,P2));
-		P1 = P2;
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcPolyline* l, TopoDS_Wire& result) {
+	IfcSchema::IfcCartesianPoint::list::ptr points = l->Points();
+
+	// Parse and store the points in a sequence
+	TColgp_SequenceOfPnt polygon;
+	for(IfcSchema::IfcCartesianPoint::list::it it = points->begin(); it != points->end(); ++ it) {
+		gp_Pnt pnt;
+		IfcGeom::Kernel::convert(*it, pnt);
+		polygon.Append(pnt);
+	}
+
+	// Remove points that are too close to one another
+	remove_redundant_points_from_loop(polygon, false);
+	
+	BRepBuilderAPI_MakePolygon w;
+	for (int i = 1; i <= polygon.Length(); ++i) {
+		w.Add(polygon.Value(i));
 	}
 
 	result = w.Wire();
 	return true;
 }
-bool IfcGeom::convert(const Ifc2x3::IfcPolyLoop::ptr l, TopoDS_Wire& result) {
-	Ifc2x3::IfcCartesianPoint::list points = l->Polygon();
 
-	BRepBuilderAPI_MakeWire w;
-	gp_Pnt P1;gp_Pnt P2;gp_Pnt F;
-	int count = 0;
-	for( Ifc2x3::IfcCartesianPoint::it it = points->begin(); it != points->end(); ++ it ) {
-		IfcGeom::convert(*it,P2);
-		if ( it != points->begin() && ( !P1.IsEqual(P2,POINT_EQUALITY_TOLERANCE) ) ) {
-			w.Add(BRepBuilderAPI_MakeEdge(P1,P2));
-			count ++;
-		} else if ( ! count ) F = P2;		
-		P1 = P2;
-	}
-	if ( !P1.IsEqual(F,POINT_EQUALITY_TOLERANCE) ) {
-		w.Add(BRepBuilderAPI_MakeEdge(P1,F));
-		count ++;
-	}
-	if ( count < 3 ) return false;
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcPolyLoop* l, TopoDS_Wire& result) {
+	IfcSchema::IfcCartesianPoint::list::ptr points = l->Polygon();
 
-	result = w.Wire();
+	// Parse and store the points in a sequence
+	TColgp_SequenceOfPnt polygon;
+	for(IfcSchema::IfcCartesianPoint::list::it it = points->begin(); it != points->end(); ++ it) {
+		gp_Pnt pnt;
+		IfcGeom::Kernel::convert(*it, pnt);
+		polygon.Append(pnt);
+	}
+
+	// A loop should consist of at least three vertices
+	int original_count = polygon.Length();
+	if (original_count < 3) {
+		Logger::Message(Logger::LOG_ERROR, "Not enough edges for:", l->entity);
+		return false;
+	}
+
+	// Remove points that are too close to one another
+	remove_redundant_points_from_loop(polygon, true);
+
+	int count = polygon.Length();
+	if (original_count - count != 0) {
+		std::stringstream ss; ss << (original_count - count) << " edges removed for:"; 
+		Logger::Message(Logger::LOG_WARNING, ss.str(), l->entity);
+	}
+
+	if (count < 3) {
+		Logger::Message(Logger::LOG_ERROR, "Not enough edges for:", l->entity);
+		return false;
+	}
+
+	BRepBuilderAPI_MakePolygon w;
+	for (int i = 1; i <= polygon.Length(); ++i) {
+		w.Add(polygon.Value(i));
+	}
+	w.Close();
+
+	result = w.Wire();	
 	return true;
-}
+}
+
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcArbitraryOpenProfileDef* l, TopoDS_Wire& result) {
+	return convert_wire(l->Curve(), result);
+}
+
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcEdgeCurve* l, TopoDS_Wire& result) {
+	IfcSchema::IfcPoint* pnt1 = ((IfcSchema::IfcVertexPoint*) l->EdgeStart())->VertexGeometry();
+	IfcSchema::IfcPoint* pnt2 = ((IfcSchema::IfcVertexPoint*) l->EdgeEnd())->VertexGeometry();
+	if (!pnt1->is(IfcSchema::Type::IfcCartesianPoint) || !pnt2->is(IfcSchema::Type::IfcCartesianPoint)) {
+		Logger::Message(Logger::LOG_ERROR, "Only IfcCartesianPoints are supported for VertexGeometry", l->entity);
+		return false;
+	}
+	
+	gp_Pnt p1, p2;
+	if (!IfcGeom::Kernel::convert(((IfcSchema::IfcCartesianPoint*)pnt1), p1) ||
+		!IfcGeom::Kernel::convert(((IfcSchema::IfcCartesianPoint*)pnt2), p2))
+	{
+		return false;
+	}
+	
+	BRepBuilderAPI_MakeWire mw;
+	Handle_Geom_Curve crv;
+
+	// The lack of a clear separation between topological and geometrical entities
+	// is starting to get problematic. If the underlying curve is bounded it is
+	// assumed that a topological wire can be crafted from it. After which an
+	// attempt is made to reconstruct it from the individual curves and the vertices
+	// of the IfcEdgeCurve.
+	const bool is_bounded = l->EdgeGeometry()->is(IfcSchema::Type::IfcBoundedCurve);
+
+	if (!is_bounded && convert_curve(l->EdgeGeometry(), crv)) {
+		mw.Add(BRepBuilderAPI_MakeEdge(crv, p1, p2));
+		result = mw;
+		return true;
+	} else if (is_bounded && convert_wire(l->EdgeGeometry(), result)) {
+		if (!l->SameSense()) std::swap(pnt1, pnt2);
+		TopExp_Explorer exp(result, TopAbs_EDGE);
+		bool first = true;
+		while (exp.More()) {
+			const TopoDS_Edge& ed = TopoDS::Edge(exp.Current());
+			Standard_Real u1, u2;
+			Handle(Geom_Curve) ecrv = BRep_Tool::Curve(ed, u1, u2);
+			exp.Next();
+			const bool last = !exp.More();
+			first = false;
+			if (first && last) {
+				mw.Add(BRepBuilderAPI_MakeEdge(ecrv, p1, p2));
+			} else if (first) {
+				gp_Pnt pu;
+				ecrv->D0(u2, pu);
+				mw.Add(BRepBuilderAPI_MakeEdge(ecrv, p1, pu));
+			} else if (last) {
+				gp_Pnt pu;
+				ecrv->D0(u1, pu);
+				mw.Add(BRepBuilderAPI_MakeEdge(ecrv, pu, p2));
+			} else {
+				mw.Add(BRepBuilderAPI_MakeEdge(ecrv, u1, u2));
+			}
+		}
+		result = mw;
+		return true;
+	} else {
+		return false;
+	}
+}
+
+bool IfcGeom::Kernel::convert(const IfcSchema::IfcEdgeLoop* l, TopoDS_Wire& result) {
+	IfcSchema::IfcOrientedEdge::list::ptr li = l->EdgeList();
+	BRepBuilderAPI_MakeWire mw;
+	for (IfcSchema::IfcOrientedEdge::list::it it = li->begin(); it != li->end(); ++it) {
+		IfcSchema::IfcOrientedEdge* e = *it;
+
+		IfcSchema::IfcPoint* pnt1 = ((IfcSchema::IfcVertexPoint*) e->EdgeStart())->VertexGeometry();
+		IfcSchema::IfcPoint* pnt2 = ((IfcSchema::IfcVertexPoint*) e->EdgeEnd())->VertexGeometry();
+		if (!pnt1->is(IfcSchema::Type::IfcCartesianPoint) || !pnt2->is(IfcSchema::Type::IfcCartesianPoint)) {
+			Logger::Message(Logger::LOG_ERROR, "Only IfcCartesianPoints are supported for VertexGeometry", l->entity);
+			return false;
+		}
+	
+		gp_Pnt p1, p2;
+		if (!IfcGeom::Kernel::convert(((IfcSchema::IfcCartesianPoint*)pnt1), p1) ||
+			!IfcGeom::Kernel::convert(((IfcSchema::IfcCartesianPoint*)pnt2), p2))
+		{
+			return false;
+		}
+
+		mw.Add(BRepBuilderAPI_MakeEdge(p1, p2));
+		continue;
+		
+		IfcSchema::IfcEdge* base = e->EdgeElement();
+		TopoDS_Wire w;
+		if (convert_wire(e->EdgeElement(), w)) {
+			if (!e->Orientation()) w.Reverse();
+			mw.Add(w);
+		}
+	}
+	result = mw;
+	return true;
+}

src/ifcgeom/IfcRegister.cpp

@@ -1,4 +1,4 @@
-/********************************************************************************
+/********************************************************************************
 *                                                                              *
 * This file is part of IfcOpenShell.                                           *
 *                                                                              *
@@ -19,47 +19,55 @@
 
 #include "IfcGeom.h"
 
-namespace IfcGeom {
-	namespace Cache {
-		std::map<int,TopoDS_Shape> Shape;
-		void PurgeShapeCache() {
-			Shape.clear();
-		}
-	}
-}
-
-using namespace Ifc2x3;
+using namespace IfcSchema;
 using namespace IfcUtil;
 
-bool IfcGeom::convert_shapes(const IfcBaseClass* l, ShapeList& r) {
+bool IfcGeom::Kernel::convert_shapes(const IfcBaseClass* l, IfcRepresentationShapeItems& r) {
 #include "IfcRegisterConvertShapes.h"
-	Ifc::LogMessage("Error","No operation defined for:",l->entity);
+	Logger::Message(Logger::LOG_ERROR,"No operation defined for:",l->entity);
 	return false;
 }
-bool IfcGeom::is_shape_collection(const IfcBaseClass* l) {
+
+bool IfcGeom::Kernel::is_shape_collection(const IfcBaseClass* l) {
 #include "IfcRegisterIsShapeCollection.h"
 	return false;
 }
-const TopoDS_Shape* IfcGeom::convert_shape(const IfcBaseClass* l, TopoDS_Shape& r) {
+
+bool IfcGeom::Kernel::convert_shape(const IfcBaseClass* l, TopoDS_Shape& r) {
 	const unsigned int id = l->entity->id();
-	std::map<int,TopoDS_Shape>::const_iterator it = Cache::Shape.find(id);
-	if ( it != Cache::Shape.end() ) { r = it->second; return &(it->second); }
+	bool success = false;
+	bool processed = false;
+	std::map<int,TopoDS_Shape>::const_iterator it = cache.Shape.find(id);
+	if ( it != cache.Shape.end() ) { r = it->second; return true; }
 #include "IfcRegisterConvertShape.h"
-	Ifc::LogMessage("Error","No operation defined for:",l->entity);
-	return 0;
+	if ( processed ) { 
+		const double precision = getValue(GV_PRECISION);
+		apply_tolerance(r, precision);
+		cache.Shape[id] = r;
+	} else {
+		Logger::Message(Logger::LOG_ERROR,"No operation defined for:",l->entity);
+	}
+	return success;
 }
-bool IfcGeom::convert_wire(const IfcBaseClass* l, TopoDS_Wire& r) {
+
+bool IfcGeom::Kernel::convert_wire(const IfcBaseClass* l, TopoDS_Wire& r) {
 #include "IfcRegisterConvertWire.h"
-	Ifc::LogMessage("Error","No operation defined for:",l->entity);
+	Handle(Geom_Curve) curve;
+	if (IfcGeom::Kernel::convert_curve(l, curve)) {
+		return IfcGeom::Kernel::convert_curve_to_wire(curve, r);
+	}
+	Logger::Message(Logger::LOG_ERROR,"No operation defined for:",l->entity);
 	return false;
 }
-bool IfcGeom::convert_face(const IfcBaseClass* l, TopoDS_Face& r) {
+
+bool IfcGeom::Kernel::convert_face(const IfcBaseClass* l, TopoDS_Shape& r) {
 #include "IfcRegisterConvertFace.h"
-	Ifc::LogMessage("Error","No operation defined for:",l->entity);
+	Logger::Message(Logger::LOG_ERROR,"No operation defined for:",l->entity);
 	return false;
 }
-bool IfcGeom::convert_curve(const IfcBaseClass* l, Handle(Geom_Curve)& r) {
+
+bool IfcGeom::Kernel::convert_curve(const IfcBaseClass* l, Handle(Geom_Curve)& r) {
 #include "IfcRegisterConvertCurve.h"
-	Ifc::LogMessage("Error","No operation defined for:",l->entity);
+	Logger::Message(Logger::LOG_ERROR,"No operation defined for:",l->entity);
 	return false;
 }

src/ifcgeom/IfcRegister.h

@@ -1,4 +1,4 @@
-/********************************************************************************
+/********************************************************************************
 *                                                                              *
 * This file is part of IfcOpenShell.                                           *
 *                                                                              *
@@ -38,36 +38,70 @@
 #include <gp_Trsf.hxx>
 #include <gp_Trsf2d.hxx>
 
+#include "../ifcparse/IfcUtil.h"
 #include "../ifcparse/IfcParse.h"
 
-using namespace Ifc2x3;
-
 SHAPES(IfcShellBasedSurfaceModel);
 SHAPES(IfcFaceBasedSurfaceModel);
 SHAPES(IfcShapeRepresentation);
 SHAPES(IfcMappedItem);
 SHAPES(IfcFacetedBrep);
+SHAPES(IfcGeometricSet);
 
+#ifdef USE_IFC4
+SHAPE(IfcCylindricalSurface);
+SHAPE(IfcAdvancedBrep);
+#endif
 SHAPE(IfcExtrudedAreaSolid);
+SHAPE(IfcRevolvedAreaSolid);
 SHAPE(IfcConnectedFaceSet);
-SHAPE(IfcBooleanClippingResult);
+SHAPE(IfcBooleanResult);
 SHAPE(IfcPolygonalBoundedHalfSpace);
 SHAPE(IfcHalfSpaceSolid);
+SHAPE(IfcSurfaceOfLinearExtrusion);
+SHAPE(IfcSurfaceOfRevolution);
+SHAPE(IfcBlock);
+SHAPE(IfcRectangularPyramid);
+SHAPE(IfcRightCircularCylinder);
+SHAPE(IfcRightCircularCone);
+SHAPE(IfcSphere);
+SHAPE(IfcCsgSolid);
+SHAPE(IfcCurveBoundedPlane);
+SHAPE(IfcRectangularTrimmedSurface);
+SHAPE(IfcSurfaceCurveSweptAreaSolid);
+SHAPE(IfcSweptDiskSolid);
 
+#ifdef USE_IFC4
+FACE(IfcAdvancedFace);
+#endif
 FACE(IfcArbitraryProfileDefWithVoids);
 FACE(IfcArbitraryClosedProfileDef);
+FACE(IfcRoundedRectangleProfileDef);
+FACE(IfcRectangleHollowProfileDef);
 FACE(IfcRectangleProfileDef);
-FACE(IfcIShapeProfileDef);
+FACE(IfcTrapeziumProfileDef)
 FACE(IfcCShapeProfileDef);
+// IfcAsymmetricIShapeProfileDef included
+FACE(IfcIShapeProfileDef);
 FACE(IfcLShapeProfileDef);
+FACE(IfcTShapeProfileDef);
+FACE(IfcUShapeProfileDef);
+FACE(IfcZShapeProfileDef);
 FACE(IfcCircleHollowProfileDef);
 FACE(IfcCircleProfileDef);
+FACE(IfcEllipseProfileDef);
+FACE(IfcCenterLineProfileDef);
+FACE(IfcCompositeProfileDef);
+FACE(IfcDerivedProfileDef);
 FACE(IfcFace);
 
+WIRE(IfcEdgeCurve);
+WIRE(IfcEdgeLoop);
 WIRE(IfcPolyline);
 WIRE(IfcPolyLoop);
 WIRE(IfcCompositeCurve);
 WIRE(IfcTrimmedCurve);
+WIRE(IfcArbitraryOpenProfileDef);
 
 CURVE(IfcCircle);
 CURVE(IfcEllipse);
@@ -77,6 +111,7 @@ CLASS(IfcCartesianPoint,gp_Pnt);
 CLASS(IfcDirection,gp_Dir);
 CLASS(IfcAxis2Placement2D,gp_Trsf2d);
 CLASS(IfcAxis2Placement3D,gp_Trsf);
+CLASS(IfcAxis1Placement,gp_Ax1);
 CLASS(IfcCartesianTransformationOperator2DnonUniform,gp_GTrsf2d);
 CLASS(IfcCartesianTransformationOperator3DnonUniform,gp_GTrsf);
 CLASS(IfcCartesianTransformationOperator2D,gp_Trsf2d);

src/ifcgeom/IfcRegisterConvertCurve.h

@@ -1,4 +1,4 @@
-#include "IfcRegisterUndef.h"
+#include "IfcRegisterUndef.h"
 #define CURVE(T) \
 	if ( l->is(T::Class()) ) return convert((T*)l,r);
 #include "IfcRegisterDef.h"

src/ifcgeom/IfcRegisterConvertFace.h

@@ -1,4 +1,4 @@
-#include "IfcRegisterUndef.h"
+#include "IfcRegisterUndef.h"
 #define FACE(T) \
 	if ( l->is(T::Class()) ) return convert((T*)l,r);
 #include "IfcRegisterDef.h"

src/ifcgeom/IfcRegisterConvertShape.h

@@ -1,14 +1,16 @@
-#include "IfcRegisterUndef.h"
+#include "IfcRegisterUndef.h"
 #define SHAPE(T) \
-	if ( l->is(T::Class()) ) { \
+	if ( !processed && l->is(T::Class()) ) { \
+		processed = true; \
 		try { \
 			if ( convert((T*)l,r) ) { \
-				Cache::Shape[id] = r; \
-				return &(Cache::Shape[id]); \
+				success = true; \
 			} \
 		} catch(...) {  } \
-		Ifc::LogMessage("Error","Failed to convert:",l->entity); \
-		return false; \
+		if ( !success) { \
+			Logger::Message(Logger::LOG_ERROR,"Failed to convert:",l->entity); \
+			return false; \
+		} \
 	}
 #include "IfcRegisterDef.h"
 

src/ifcgeom/IfcRegisterConvertShapes.h

@@ -1,10 +1,10 @@
-#include "IfcRegisterUndef.h"
+#include "IfcRegisterUndef.h"
 #define SHAPES(T) \
 	if ( l->is(T::Class()) ) { \
 		try { \
-			return IfcGeom::convert((T*)l,r); \
+			return convert((T*)l,r); \
 		} catch (...) { } \
-		Ifc::LogMessage("Error","Failed to convert:",l->entity); \
+		Logger::Message(Logger::LOG_ERROR,"Failed to convert:",l->entity); \
 		return false; \
 	}
 #include "IfcRegisterDef.h"

src/ifcgeom/IfcRegisterConvertWire.h

@@ -1,4 +1,4 @@
-#include "IfcRegisterUndef.h"
+#include "IfcRegisterUndef.h"
 #define WIRE(T) \
 	if ( l->is(T::Class()) ) return convert((T*)l,r);
 #include "IfcRegisterDef.h"

src/ifcgeom/IfcRegisterCreateCache.h

@@ -1,4 +1,4 @@
-#include "IfcRegisterUndef.h"
+#include "IfcRegisterUndef.h"
 #define CLASS(T,V) \
 	std::map<int,V> T;
 #include "IfcRegisterDef.h"

src/ifcgeom/IfcRegisterDef.h

@@ -1,4 +1,4 @@
-#ifndef SHAPES
+#ifndef SHAPES
 #define SHAPES(T)
 #endif
 #ifndef SHAPE

src/ifcgeom/IfcRegisterGeomHeader.h

@@ -1,9 +1,9 @@
-#include "IfcRegisterUndef.h"
-#define CLASS(T,V) bool convert(const T::ptr L, V& r);
-#define SHAPES(T) CLASS(T,ShapeList)
+#include "IfcRegisterUndef.h"
+#define CLASS(T,V) bool convert(const IfcSchema::T* L, V& r);
+#define SHAPES(T) CLASS(T,IfcRepresentationShapeItems)
 #define SHAPE(T) CLASS(T,TopoDS_Shape)
 #define WIRE(T) CLASS(T,TopoDS_Wire)
-#define FACE(T) CLASS(T,TopoDS_Face)
+#define FACE(T) CLASS(T,TopoDS_Shape)
 #define CURVE(T) CLASS(T,Handle(Geom_Curve))
 #include "IfcRegisterDef.h"
 

src/ifcgeom/IfcRegisterIsShapeCollection.h

@@ -1,4 +1,4 @@
-#include "IfcRegisterUndef.h"
+#include "IfcRegisterUndef.h"
 #define SHAPES(T) \
 	if ( l->is(T::Class()) ) return true;
 #include "IfcRegisterDef.h"

src/ifcgeom/IfcRegisterPurgeCache.h

@@ -1,4 +1,4 @@
-#include "IfcRegisterUndef.h"
+#include "IfcRegisterUndef.h"
 #define CLASS(T,V) \
 	T.clear();
 #include "IfcRegisterDef.h"

src/ifcgeom/IfcRegisterUndef.h

@@ -1,4 +1,4 @@
-#ifdef SHAPES
+#ifdef SHAPES
 #undef SHAPES
 #endif
 #ifdef SHAPE

src/ifcgeom/IfcRepresentationShapeItem.h

@@ -0,0 +1,52 @@
+/********************************************************************************
+ *                                                                              *
+ * This file is part of IfcOpenShell.                                           *
+ *                                                                              *
+ * IfcOpenShell is free software: you can redistribute it and/or modify         *
+ * it under the terms of the Lesser GNU General Public License as published by  *
+ * the Free Software Foundation, either version 3.0 of the License, or          *
+ * (at your option) any later version.                                          *
+ *                                                                              *
+ * IfcOpenShell is distributed in the hope that it will be useful,              *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of               *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                 *
+ * Lesser GNU General Public License for more details.                          *
+ *                                                                              *
+ * You should have received a copy of the Lesser GNU General Public License     *
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.         *
+ *                                                                              *
+ ********************************************************************************/
+
+#ifndef IFCSHAPELIST_H
+#define IFCSHAPELIST_H
+
+#include <gp_GTrsf.hxx>
+#include <TopoDS_Shape.hxx>
+
+#include "../ifcgeom/IfcGeomRenderStyles.h"
+
+namespace IfcGeom {	
+	class IfcRepresentationShapeItem {
+	private:
+		gp_GTrsf placement;
+		TopoDS_Shape shape;
+		const SurfaceStyle* style;
+	public:
+		IfcRepresentationShapeItem(const gp_GTrsf& placement, const TopoDS_Shape& shape, const SurfaceStyle* style)
+			: placement(placement), shape(shape), style(style) {}
+		IfcRepresentationShapeItem(const gp_GTrsf& placement, const TopoDS_Shape& shape)
+			: placement(placement), shape(shape), style(0) {}
+		IfcRepresentationShapeItem(const TopoDS_Shape& shape, const SurfaceStyle* style)
+			: shape(shape), style(style) {}
+		IfcRepresentationShapeItem(const TopoDS_Shape& shape)
+			: shape(shape), style(0) {}
+		void append(const gp_GTrsf& trsf) { placement.Multiply(trsf); }
+		void prepend(const gp_GTrsf& trsf) { placement.PreMultiply(trsf); }
+		const TopoDS_Shape& Shape() const { return shape; }
+		const gp_GTrsf& Placement() const { return placement; }
+		bool hasStyle() const { return style != 0; }
+		const SurfaceStyle& Style() const { return *style; }
+	};
+	typedef std::vector<IfcRepresentationShapeItem> IfcRepresentationShapeItems;
+}
+#endif

src/ifcgeomserver/IfcGeomServer.cpp

@@ -0,0 +1,345 @@
+/********************************************************************************
+ *                                                                              *
+ * This file is part of IfcOpenShell.                                           *
+ *                                                                              *
+ * IfcOpenShell is free software: you can redistribute it and/or modify         *
+ * it under the terms of the Lesser GNU General Public License as published by  *
+ * the Free Software Foundation, either version 3.0 of the License, or          *
+ * (at your option) any later version.                                          *
+ *                                                                              *
+ * IfcOpenShell is distributed in the hope that it will be useful,              *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of               *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                 *
+ * Lesser GNU General Public License for more details.                          *
+ *                                                                              *
+ * You should have received a copy of the Lesser GNU General Public License     *
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.         *
+ *                                                                              *
+ ********************************************************************************/
+
+/********************************************************************************
+ *                                                                              *
+ * This examples exposes the IfcOpenShell API through a command-based stdin     *
+ * interface                                                                    *
+ *                                                                              *
+ ********************************************************************************/
+
+#include <iostream>
+#include <boost/cstdint.hpp>
+
+#if defined(_WIN32) && !defined(__CYGWIN__)
+#define SET_BINARY_STREAMS
+#endif
+#ifdef SET_BINARY_STREAMS
+#include <io.h>
+#include <fcntl.h>
+#endif
+
+#include "../ifcgeom/IfcGeomIterator.h"
+
+using namespace boost;
+
+template <typename T>
+T sread(std::istream& s) {
+	char buf[sizeof(T)];
+	s.read(buf, sizeof(T));
+	return *((T*)buf);
+}
+
+template <>
+std::string sread(std::istream& s) {
+	int32_t len = sread<int32_t>(s);
+	char* buf = new char[len + 1];
+	s.read(buf, len);
+	buf[len] = 0;
+	while (len++ % 4) s.get();
+	std::string str(buf);
+	delete buf;
+	return str;
+}
+
+static std::streambuf *stdout_orig, *stdout_redir;
+
+template <typename T>
+void swrite(std::ostream& s, T t) {
+	char buf[sizeof(T)];
+	memcpy(buf, &t, sizeof(T));
+	s.write(buf, sizeof(T));
+}
+
+template <>
+void swrite(std::ostream& s, std::string t) {
+	int32_t len = t.size();
+	swrite(s, len);
+	s.write(t.c_str(), len);
+	while (len++ % 4) s.put(0);
+}
+
+class Command {
+protected:
+	virtual void read_content(std::istream& s) = 0;
+	virtual void write_content(std::ostream& s) = 0;
+	int32_t iden;
+	int32_t len;
+public:
+	void read(std::istream& s) {
+		len = sread<int32_t>(s);
+		read_content(s);
+	}
+
+	void write(std::ostream& s) {
+		std::cout.rdbuf(stdout_orig);
+		swrite(s, iden);
+		std::ostringstream oss;
+		write_content(oss);
+		swrite(s, oss.str());
+		s.flush();
+		std::cout.rdbuf(stdout_redir);
+	}
+
+	Command(int32_t iden) : iden(iden) {}
+};
+
+const int32_t HELLO     = 0xff00;
+const int32_t IFC_MODEL = HELLO     + 1;
+const int32_t GET       = IFC_MODEL + 1;
+const int32_t ENTITY    = GET       + 1;
+const int32_t MORE      = ENTITY    + 1;
+const int32_t NEXT      = MORE      + 1;
+const int32_t BYE       = NEXT      + 1;
+const int32_t GET_LOG   = BYE       + 1;
+const int32_t LOG       = GET_LOG   + 1;
+
+class Hello : public Command {
+private:
+	std::string str;
+protected:
+	void read_content(std::istream& s) {
+		str = sread<std::string>(s);
+	}
+	void write_content(std::ostream& s) {
+		swrite(s, str);
+	}
+public:
+	const std::string& string() { return str; }
+	Hello() : Command(HELLO), str("IfcOpenShell-" IFCOPENSHELL_VERSION) {}
+};
+
+class More : public Command {
+private:
+	bool more;
+protected:
+	void read_content(std::istream& s) {
+		more = sread<int32_t>(s) == 1;
+	}
+	void write_content(std::ostream& s) {
+		swrite<int32_t>(s, more ? 1 : 0);
+	}
+public:
+	More(bool more) : Command(MORE), more(more) {}
+};
+
+class IfcModel : public Command {
+private:
+	std::string str;
+protected:
+	void read_content(std::istream& s) {
+		str = sread<std::string>(s);
+	}
+	void write_content(std::ostream& s) {
+		swrite(s, str);
+	}
+public:
+	const std::string& string() { return str; }
+	IfcModel() : Command(IFC_MODEL) {};
+};
+
+class Get : public Command {
+protected:
+	void read_content(std::istream& s) {}
+	void write_content(std::ostream& s) {}
+public:
+	Get() : Command(GET) {};
+};
+
+class GetLog : public Command {
+protected:
+	void read_content(std::istream& s) {}
+	void write_content(std::ostream& s) {}
+public:
+	GetLog() : Command(GET_LOG) {};
+};
+
+class WriteLog : public Command {
+private:
+	std::string str;
+protected:
+	void read_content(std::istream& s) {
+		str = sread<std::string>(s);
+	}
+	void write_content(std::ostream& s) {
+		swrite(s, str);
+	}
+public:
+	WriteLog(const std::string& str) : Command(LOG), str(str) {};
+};
+
+class Entity : public Command {
+private:
+	const IfcGeom::TriangulationElement<float>* geom;
+protected:
+	void read_content(std::istream& s) {}
+	void write_content(std::ostream& s) {
+		swrite<int32_t>(s, geom->id());
+		swrite(s, geom->guid());
+		swrite(s, geom->name());
+		swrite(s, geom->type());
+		swrite<int32_t>(s, geom->parent_id());
+		const std::vector<float>& m = geom->transformation().matrix().data();
+		const float matrix_array[16] = {
+			m[0], m[3], m[6], m[ 9],
+			m[1], m[4], m[7], m[10],
+			m[2], m[5], m[8], m[11],
+			   0,    0,    0,     1
+		};
+		swrite(s, std::string((char*)matrix_array, 16 * sizeof(float)));
+		swrite<int32_t>(s, geom->geometry().id());
+		swrite(s, std::string((char*)geom->geometry().verts().data(), geom->geometry().verts().size() * sizeof(float)));
+		swrite(s, std::string((char*)geom->geometry().normals().data(), geom->geometry().normals().size() * sizeof(float)));
+		{ std::vector<int32_t> indices;
+		for (std::vector<int>::const_iterator it = geom->geometry().faces().begin(); it != geom->geometry().faces().end(); ++it) {
+			indices.push_back(*it);
+		} 
+		swrite(s, std::string((char*) indices.data(), indices.size() * sizeof(int32_t))); }
+		{ std::vector<float> diffuse_color_array;
+		for (std::vector<IfcGeom::Material>::const_iterator it = geom->geometry().materials().begin(); it != geom->geometry().materials().end(); ++it) {
+			const IfcGeom::Material& m = *it;
+			if (m.hasDiffuse()) {
+				const double* color = m.diffuse();
+				diffuse_color_array.push_back(static_cast<float>(color[0]));
+				diffuse_color_array.push_back(static_cast<float>(color[1]));
+				diffuse_color_array.push_back(static_cast<float>(color[2]));
+			} else {
+				diffuse_color_array.push_back(0.f);
+				diffuse_color_array.push_back(0.f);
+				diffuse_color_array.push_back(0.f);
+			}
+			if (m.hasTransparency()) {
+				diffuse_color_array.push_back(static_cast<float>(1. - m.transparency()));
+			} else {
+				diffuse_color_array.push_back(1.f);
+			}
+		}
+		swrite(s, std::string((char*) diffuse_color_array.data(), diffuse_color_array.size() * sizeof(float))); }
+		{ std::vector<int32_t> material_indices;
+		for (std::vector<int>::const_iterator it = geom->geometry().material_ids().begin(); it != geom->geometry().material_ids().end(); ++it) {
+			material_indices.push_back(*it);
+		} 
+		swrite(s, std::string((char*) material_indices.data(), material_indices.size() * sizeof(int32_t))); }
+	}
+public:
+	Entity(const IfcGeom::TriangulationElement<float>* geom) : Command(ENTITY), geom(geom) {};
+};
+
+class Next : public Command {
+protected:
+	void read_content(std::istream& s) {}
+	void write_content(std::ostream& s) {}
+public:
+	Next() : Command(NEXT) {};
+};
+
+class Bye : public Command {
+protected:
+	void read_content(std::istream& s) {}
+	void write_content(std::ostream& s) {}
+public:
+	Bye() : Command(BYE) {};
+};
+
+int main (int argc, char** argv) {
+	if (sizeof(float) != 4 || sizeof(int32_t) != 4) {
+		return 1;
+	}
+
+	// Redirect stdout to this stream, so that involuntary 
+	// writes to stdout do not interfere with our protocol.
+	std::ostringstream oss;
+	stdout_redir = oss.rdbuf();
+	stdout_orig = std::cout.rdbuf();
+	std::cout.rdbuf(stdout_redir);
+
+#ifdef SET_BINARY_STREAMS
+	_setmode(_fileno(stdout), _O_BINARY);
+	std::cout.setf(std::ios_base::binary);
+	_setmode(_fileno(stdin), _O_BINARY);
+	std::cin.setf(std::ios_base::binary);
+#endif
+
+	bool has_more = false;
+
+	IfcGeom::Iterator<float>* iterator = 0;
+
+	Hello().write(std::cout);
+
+	int exit_code = 0;
+	while (1) {
+		const int32_t msg_type = sread<int32_t>(std::cin);
+		switch (msg_type) {
+		case IFC_MODEL: {
+			IfcModel m; m.read(std::cin);
+			std::string::size_type len = m.string().size();
+			char* data = new char[len];
+			memcpy(data, m.string().c_str(), len);
+
+			IfcGeom::IteratorSettings settings;
+			settings.use_world_coords() = false;
+			settings.weld_vertices() = false;
+			settings.convert_back_units() = true;
+			settings.force_ccw_face_orientation() = true;
+
+			iterator = new IfcGeom::Iterator<float>(settings, data, len);
+			has_more = iterator->findContext();
+
+			More(has_more).write(std::cout);
+			continue;
+		}
+		case GET: {
+			Get g; g.read(std::cin);
+			if (!has_more) {
+				exit_code = 1;
+				break;
+			}
+			const IfcGeom::TriangulationElement<float>* geom = static_cast<const IfcGeom::TriangulationElement<float>*>(iterator->get());
+			Entity(geom).write(std::cout);
+			continue;
+		}
+		case NEXT: {
+			Next n; n.read(std::cin);
+			has_more = iterator->next();
+			if (!has_more) {
+				delete iterator;
+				iterator = 0;
+			}
+			More(has_more).write(std::cout);
+			continue;
+		}
+		case GET_LOG: {
+			GetLog gl; gl.read(std::cin);
+			WriteLog(iterator->getLog()).write(std::cout);
+			continue;
+		}
+		case BYE: {
+			Bye().write(std::cout);
+			exit_code = 0;
+			break;
+		}
+		default: 
+			exit_code = 1; 
+			break;
+		}
+		break;
+	}
+	std::cout.rdbuf(stdout_orig);
+	return exit_code;
+}

src/ifcjni/IfcJni.cpp

@@ -1,4 +1,4 @@
-/********************************************************************************
+/********************************************************************************
 *                                                                              *
 * This file is part of IfcOpenShell.                                           *
 *                                                                              *
@@ -27,7 +27,7 @@
 #include "org_ifcopenshell_IfcOpenShellModel.h"
 #include "../ifcgeom/IfcGeomObjects.h"
 
-bool has_more = false;
+static bool has_more = false;
 
 JNIEXPORT jobject JNICALL Java_org_ifcopenshell_IfcOpenShellModel_getGeometry (JNIEnv * env, jobject) {
 	if ( ! has_more ) return 0;
@@ -37,19 +37,19 @@ JNIEXPORT jobject JNICALL Java_org_ifcopenshell_IfcOpenShellModel_getGeometry (J
 	if ( ! jconstructor ) return 0;
 	const IfcGeomObjects::IfcGeomObject* o = IfcGeomObjects::Get();
 
-	jstring name = env->NewStringUTF(o->name.c_str());
-	jstring type = env->NewStringUTF(o->type.c_str());
-	jstring guid = env->NewStringUTF(o->guid.c_str());
+	jstring name = env->NewStringUTF(o->name().c_str());
+	jstring type = env->NewStringUTF(o->type().c_str());
+	jstring guid = env->NewStringUTF(o->guid().c_str());
 
-	jintArray indices = env->NewIntArray(o->mesh->faces.size());
-	jfloatArray positions = env->NewFloatArray(o->mesh->verts.size());
-	jfloatArray normals = env->NewFloatArray(o->mesh->normals.size());
+	jintArray indices = env->NewIntArray(o->mesh().faces().size());
+	jfloatArray positions = env->NewFloatArray(o->mesh().verts().size());
+	jfloatArray normals = env->NewFloatArray(o->mesh().normals().size());
 
-	env->SetIntArrayRegion(indices,0,o->mesh->faces.size(),(jint*) &o->mesh->faces[0]);
-	env->SetFloatArrayRegion(positions,0,o->mesh->verts.size(),(jfloat*) &o->mesh->verts[0]);
-	env->SetFloatArrayRegion(normals,0,o->mesh->normals.size(),(jfloat*) &o->mesh->normals[0]);
+	env->SetIntArrayRegion(indices,0,o->mesh().faces().size(),(jint*) &o->mesh().faces()[0]);
+	env->SetFloatArrayRegion(positions,0,o->mesh().verts().size(),(jfloat*) &o->mesh().verts()[0]);
+	env->SetFloatArrayRegion(normals,0,o->mesh().normals().size(),(jfloat*) &o->mesh().normals()[0]);
 
-	jobject return_obj = env->NewObject(class_def, jconstructor, o->id, name, type, guid, indices, positions, normals);
+	jobject return_obj = env->NewObject(class_def, jconstructor, o->id(), name, type, guid, indices, positions, normals);
 
 	env->DeleteLocalRef(name);
 	env->DeleteLocalRef(type);

src/ifcjni/org_ifcopenshell_IfcOpenShellModel.h

@@ -1,4 +1,4 @@
-/* DO NOT EDIT THIS FILE - it is machine generated */
+/* DO NOT EDIT THIS FILE - it is machine generated */
 #include <jni.h>
 /* Header for class org_ifcopenshell_IfcOpenShellModel */
 

src/ifcmax/IfcMax.cpp

@@ -1,4 +1,4 @@
-/********************************************************************************
+/********************************************************************************
  *                                                                              *
  * This file is part of IfcOpenShell.                                           *
  *                                                                              *
@@ -17,13 +17,14 @@
  *                                                                              *
  ********************************************************************************/
 
-#include "Max.h"
-#include "stdmat.h"
-#include "istdplug.h"
+#include <Max.h>
+#include <stdmat.h>
+#include <istdplug.h>
 
 #include "../ifcmax/IfcMax.h"
-#include "../ifcmax/MaxMaterials.h"
-#include "../ifcgeom/IfcGeomObjects.h"
+#include "../ifcgeom/IfcGeomIterator.h"
+
+static const int NUM_MATERIAL_SLOTS = 24;
 
 int controlsInit = false;
 
@@ -101,85 +102,181 @@ void IFCImp::ShowAbout(HWND hWnd) {}
 
 DWORD WINAPI fn(LPVOID arg) { return 0; }
 
+#if MAX_RELEASE > 14000
+# define S(x) (TSTR::FromCStr(x.c_str()))
+#elif defined(_UNICODE)
+# define S(x) (WStr(x.c_str()))
+#else
+# define S(x) (CStr(x.c_str()))
+#endif
+
+Mtl* FindMaterialByName(MtlBaseLib* library, const std::string& material_name) {
+	const int mat_index = library->FindMtlByName(S(material_name));
+	Mtl* m = 0;
+	if (mat_index != -1) {
+		m = static_cast<Mtl*>((*library)[mat_index]);
+	}
+	return m;
+}
+
+Mtl* FindOrCreateMaterial(MtlBaseLib* library, Interface* max_interface, int& slot, const IfcGeom::Material& material) {
+	Mtl* m = FindMaterialByName(library, material.name());
+	if (m == 0) {
+		StdMat2* stdm = NewDefaultStdMat();
+		const TimeValue t = -1;
+		if (material.hasDiffuse()) {
+			const double* diffuse = material.diffuse();
+			stdm->SetDiffuse(Color(diffuse[0], diffuse[1], diffuse[2]),t);
+		}
+		if (material.hasSpecular()) {
+			const double* specular = material.specular();
+			stdm->SetSpecular(Color(specular[0], specular[1], specular[2]),t);
+		}
+		if (material.hasSpecularity()) {
+			stdm->SetShininess(material.specularity(), t);
+		}
+		if (material.hasTransparency()) {
+			stdm->SetOpacity(1.0 - material.transparency(), t);
+		}
+		m = stdm;
+		m->SetName(S(material.name()));
+		library->Add(m);
+		if (slot < NUM_MATERIAL_SLOTS) {
+			max_interface->PutMtlToMtlEditor(m,slot++);
+		}
+	}
+	return m;
+}
+
+Mtl* ComposeMultiMaterial(std::map<std::vector<std::string>, Mtl*>& multi_mats, MtlBaseLib* library, Interface* max_interface, int& slot, const std::vector<IfcGeom::Material>& materials, const std::string& object_type, const std::vector<int>& material_ids) {
+	std::vector<std::string> material_names;
+	bool needs_default = std::find(material_ids.begin(), material_ids.end(), -1) != material_ids.end();
+	if (needs_default) {
+		material_names.push_back(object_type);
+	}
+	for (auto it = materials.begin(); it != materials.end(); ++it) {
+		material_names.push_back(it->name());
+	}
+	Mtl* default_material = 0;
+	if (needs_default) {
+		default_material = FindMaterialByName(library, object_type);
+		if (default_material == 0) {
+			default_material = NewDefaultStdMat();
+			default_material->SetName(S(object_type));
+			library->Add(default_material);
+			if (slot < NUM_MATERIAL_SLOTS) {
+				max_interface->PutMtlToMtlEditor(default_material, slot++);
+			}
+		}
+	}
+	if (material_names.size() == 1) {
+		if (needs_default) {
+			return default_material;
+		} else {
+			return FindOrCreateMaterial(library, max_interface, slot, *materials.begin());
+		}
+	}
+	std::map<std::vector<std::string>, Mtl*>::const_iterator i = multi_mats.find(material_names);
+	if (i != multi_mats.end()) {
+		return i->second;
+	}
+	MultiMtl* multi_mat = NewDefaultMultiMtl();
+	multi_mat->SetNumSubMtls(material_names.size());
+	int mtl_id = 0;
+	if (needs_default) {
+		multi_mat->SetSubMtlAndName(mtl_id ++, default_material, default_material->GetName());
+	}
+	for (auto it = materials.begin(); it != materials.end(); ++it) {
+		Mtl* mtl = FindOrCreateMaterial(library, max_interface, slot, *it);
+		multi_mat->SetSubMtl(mtl_id ++, mtl);
+	}
+	library->Add(multi_mat);
+	if (slot < NUM_MATERIAL_SLOTS) {
+		max_interface->PutMtlToMtlEditor(multi_mat,slot++);
+	}
+	multi_mats.insert(std::pair<std::vector<std::string>, Mtl*>(material_names, multi_mat));
+	return multi_mat;
+}
+
 int IFCImp::DoImport(const TCHAR *name, ImpInterface *impitfc, Interface *itfc, BOOL suppressPrompts) {
 
-	itfc->ProgressStart("Importing file...", TRUE, fn, NULL);
+	IfcGeom::IteratorSettings settings;
+	settings.use_world_coords() = false;
+	settings.weld_vertices() = true;
+	settings.sew_shells() = true;
 
-	IfcGeomObjects::Settings(IfcGeomObjects::USE_WORLD_COORDS,false);
-	IfcGeomObjects::Settings(IfcGeomObjects::WELD_VERTICES,true);
-	IfcGeomObjects::Settings(IfcGeomObjects::SEW_SHELLS,true);
+#ifdef _UNICODE
+	int fn_buffer_size = WideCharToMultiByte(CP_UTF8, 0, name, -1, 0, 0, 0, 0);
+	char* fn_mb = new char[fn_buffer_size];
+	WideCharToMultiByte(CP_UTF8, 0, name, -1, fn_mb, fn_buffer_size, 0, 0);
+#else
+	const char* fn_mb = name;
+#endif
 
-	if ( ! IfcGeomObjects::Init((char*)name,0,0) ) return false;
+	IfcGeom::Iterator<float> iterator(settings, fn_mb);
+
+	if (!iterator.findContext()) return false;
+
+	itfc->ProgressStart(_T("Importing file..."), TRUE, fn, NULL);
 
-	//std::map<int, TriObject*> dict;
 	MtlBaseLib* mats = itfc->GetSceneMtls();
 	int slot = mats->Count();
 
+	std::map<std::vector<std::string>, Mtl*> material_cache;
+
 	do{
+		const IfcGeom::TriangulationElement<float>* o = static_cast<const IfcGeom::TriangulationElement<float>*>(iterator.get());
 
-		const IfcGeomObjects::IfcGeomObject* o = IfcGeomObjects::Get();
-		
-		Mtl *m;
-		const int matIndex = mats->FindMtlByName(MSTR(o->type.c_str()));
-		if ( matIndex == -1 ) {
-			StdMat2* stdm = GetMaterial(o->type);
-			m = stdm;
-			m->SetName(o->type.c_str());
-			mats->Add(m);
-			itfc->PutMtlToMtlEditor(m,slot++);
-		} else {
-			m = static_cast<Mtl*>((*mats)[matIndex]);
-		} 
-		
-		// This mapping is useless for now, because this even in case
-		// meshes entities in IFC share the same representation elements
-		// they will never be given the same id.
-		// TODO: Fix this!
-		// std::map<int, TriObject*>::const_iterator it = dict.find(o->mesh->id);
+		TSTR o_type = S(o->type());
+		TSTR o_guid = S(o->guid());
 
-		TriObject* tri;
-		// if ( it == dict.end() ) {
-			tri = CreateNewTriObject();
-			const int numVerts = o->mesh->verts.size()/3;
-			tri->mesh.setNumVerts(numVerts);
-			for( int i = 0; i < numVerts; i ++ ) {
-				tri->mesh.setVert(i,o->mesh->verts[3*i+0],o->mesh->verts[3*i+1],o->mesh->verts[3*i+2]);
-			}
-			const int numFaces = o->mesh->faces.size()/3;
-			tri->mesh.setNumFaces(numFaces);
-			for( int i = 0; i < numFaces; i ++ ) {
-				tri->mesh.faces[i].setVerts(o->mesh->faces[3*i+0],o->mesh->faces[3*i+1],o->mesh->faces[3*i+2]);
-				tri->mesh.faces[i].setEdgeVisFlags(o->mesh->edges[3*i+0],o->mesh->edges[3*i+1],o->mesh->edges[3*i+2]);
-			}
+		Mtl *m = ComposeMultiMaterial(material_cache, mats, itfc, slot, o->geometry().materials(), o->type(), o->geometry().material_ids());
+
+		TriObject* tri = CreateNewTriObject();
+
+		const int numVerts = o->geometry().verts().size()/3;
+		tri->mesh.setNumVerts(numVerts);
+		for( int i = 0; i < numVerts; i ++ ) {
+			tri->mesh.setVert(i,o->geometry().verts()[3*i+0],o->geometry().verts()[3*i+1],o->geometry().verts()[3*i+2]);
+		}
+		const int numFaces = o->geometry().faces().size()/3;
+		tri->mesh.setNumFaces(numFaces);
+
+		bool needs_default = std::find(o->geometry().material_ids().begin(), o->geometry().material_ids().end(), -1) != o->geometry().material_ids().end();
+
+		for( int i = 0; i < numFaces; i ++ ) {
+			tri->mesh.faces[i].setVerts(o->geometry().faces()[3*i+0],o->geometry().faces()[3*i+1],o->geometry().faces()[3*i+2]);
+			tri->mesh.faces[i].setEdgeVisFlags(o->geometry().edges()[3*i+0],o->geometry().edges()[3*i+1],o->geometry().edges()[3*i+2]);
+			MtlID mtlid = o->geometry().material_ids()[i];
+			if (needs_default) mtlid ++;
+			tri->mesh.faces[i].setMatID(mtlid);
+		}
 				
-			tri->mesh.buildNormals();
-			// Either use this or undefine the FACESETS_AS_COMPOUND option in IfcGeom.h to have
-			// properly oriented normals. Using only the line below will result in a consistent
-			// orientation of normals accross shells, but not always oriented towards the
-			// outside.
-			// tri->mesh.UnifyNormals(false);
-			tri->mesh.BuildStripsAndEdges();
-			tri->mesh.InvalidateTopologyCache();
-			tri->mesh.InvalidateGeomCache();
-
-		//	dict[o->mesh->id] = tri;
-		// } else {
-		// 	tri = (*it).second;
-		// }
+		tri->mesh.buildNormals();
+		// Either use this or undefine the FACESETS_AS_COMPOUND option in IfcGeom.h to have
+		// properly oriented normals. Using only the line below will result in a consistent
+		// orientation of normals accross shells, but not always oriented towards the
+		// outside.
+		// tri->mesh.UnifyNormals(false);
+		tri->mesh.BuildStripsAndEdges();
+		tri->mesh.InvalidateTopologyCache();
+		tri->mesh.InvalidateGeomCache();
 
 		ImpNode* node = impitfc->CreateNode();
 		node->Reference(tri);
-		node->SetName(o->guid.c_str());
-		node->GetINode()->SetMtl(m);
-		node->SetTransform(0,Matrix3 ( Point3(o->matrix[0],o->matrix[1],o->matrix[2]),Point3(o->matrix[3],o->matrix[4],o->matrix[5]),
-			Point3(o->matrix[6],o->matrix[7],o->matrix[8]),Point3(o->matrix[9],o->matrix[10],o->matrix[11]) ));
+		node->SetName(o_guid);
+		node->GetINode()->Hide(o->type() == "IfcOpeningElement" || o->type() == "IfcSpace");
+		if (m) {
+			node->GetINode()->SetMtl(m);
+		}
+		const std::vector<float>& matrix_data = o->transformation().matrix().data();
+		node->SetTransform(0,Matrix3 ( Point3(matrix_data[0],matrix_data[1],matrix_data[2]),Point3(matrix_data[3],matrix_data[4],matrix_data[5]),
+			Point3(matrix_data[6],matrix_data[7],matrix_data[8]),Point3(matrix_data[9],matrix_data[10],matrix_data[11]) ));
 		impitfc->AddNodeToScene(node);
 
-		itfc->ProgressUpdate(IfcGeomObjects::Progress(),true,"");
+		itfc->ProgressUpdate(iterator.progress(), true, _T(""));
 
-	} while ( IfcGeomObjects::Next() );
-
-	IfcGeomObjects::CleanUp();
+	} while (iterator.next());
 
 	itfc->ProgressEnd();
 	

src/ifcmax/IfcMax.h

@@ -1,4 +1,4 @@
-/********************************************************************************
+/********************************************************************************
  *                                                                              *
  * This file is part of IfcOpenShell.                                           *
  *                                                                              *

src/ifcobj/IfcObj.cpp

@@ -1,127 +0,0 @@
-/********************************************************************************
- *                                                                              *
- * This file is part of IfcOpenShell.                                           *
- *                                                                              *
- * IfcOpenShell is free software: you can redistribute it and/or modify         *
- * it under the terms of the Lesser GNU General Public License as published by  *
- * the Free Software Foundation, either version 3.0 of the License, or          *
- * (at your option) any later version.                                          *
- *                                                                              *
- * IfcOpenShell is distributed in the hope that it will be useful,              *
- * but WITHOUT ANY WARRANTY; without even the implied warranty of               *
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                 *
- * Lesser GNU General Public License for more details.                          *
- *                                                                              *
- * You should have received a copy of the Lesser GNU General Public License     *
- * along with this program. If not, see <http://www.gnu.org/licenses/>.         *
- *                                                                              *
- ********************************************************************************/
-
-/********************************************************************************
- *                                                                              *
- * This is a brief example of how IfcOpenShell can be interfaced from within    *
- * a C++ context. The application reads an .ifc file and outputs geometry in    *
- * the Wavefront .obj file format.                                              *
- *                                                                              *
- ********************************************************************************/
-
-#include <fstream>
-#include <sstream>
-#include <set>
-#include <time.h>
-
-#include "../ifcgeom/IfcGeomObjects.h"
-#include "../ifcobj/ObjMaterials.h"
-
-int main ( int argc, char** argv ) {
-	if ( argc != 2 ) {
-		std::cout << "usage: IfcObj <filename.ifc>" << std::endl;
-		return 1;
-	}
-	const std::string fnObj = std::string(argv[1]) + ".obj";
-	const std::string fnMtl = std::string(argv[1]) + ".mtl";
-	ofstream fObj(fnObj.c_str());
-	ofstream fMtl(fnMtl.c_str());
-	if ( ! ( fObj.is_open() && fMtl.is_open() ) ) {
-		std::cout << "[Error] unable to open output file for writing" << std::endl;
-		return 1;
-	}
-
-	IfcGeomObjects::Settings(IfcGeomObjects::USE_WORLD_COORDS,true);
-	IfcGeomObjects::Settings(IfcGeomObjects::WELD_VERTICES,false);
-	IfcGeomObjects::Settings(IfcGeomObjects::SEW_SHELLS,true);
-
-	// Stream for log messages, we don't want to interupt our new progress bar...
-	std::stringstream ss;
-
-	// Parse the file supplied in argv[1]. Returns true on succes.
-	if ( ! IfcGeomObjects::Init(argv[1],&std::cout,&ss) ) {
-		std::cout << "[Error] unable to parse .ifc file or no geometrical entities found" << std::endl;
-		return 1;
-	}
-
-	fObj << "# File generated by IfcOpenShell " << IFCOPENSHELL_VERSION << std::endl;
-	fObj << "mtllib " << fnMtl << std::endl;
-	std::set<std::string> materials;
-
-	time_t start,end;
-	time(&start);
-	int old_progress = -1;
-	std::cout << "Creating geometry..." << std::endl;
-
-	// The functions IfcGeomObjects::Get() and IfcGeomObjects::Next() wrap an iterator of all geometrical entities in the Ifc file.
-	// IfcGeomObjects::Get() returns an IfcGeomObjects::IfcGeomObject (see IfcObjects.h for definition)
-	// IfcGeomObjects::Next() is used to poll whether more geometrical entities are available
-    int vcount_total = 1;
-	do {
-		const IfcGeomObjects::IfcGeomObject* o = IfcGeomObjects::Get();
-		if ( o->type == "IfcSpace" || o->type == "IfcOpeningElement" ) continue;
-		const std::string name = o->name.empty() ? o->guid : o->name;
-		fObj << "g " << name << std::endl;
-		fObj << "s 1" << std::endl;
-		fObj << "usemtl " << o->type << std::endl;
-		materials.insert(o->type);
-		const int vcount = o->mesh->verts.size() / 3;
-		for ( IfcGeomObjects::FltIt it = o->mesh->verts.begin(); it != o->mesh->verts.end(); ) {
-			const double x = *(it++);
-			const double y = *(it++);
-			const double z = *(it++);
-			fObj << "v " << x << " " << y << " " << z << std::endl;
-		}
-		for ( IfcGeomObjects::FltIt it = o->mesh->normals.begin(); it != o->mesh->normals.end(); ) {
-			const double x = *(it++);
-			const double y = *(it++);
-			const double z = *(it++);
-			fObj << "vn " << x << " " << y << " " << z << std::endl;
-		}
-		for ( IfcGeomObjects::IntIt it = o->mesh->faces.begin(); it != o->mesh->faces.end(); ) {
-			const int v1 = *(it++)+vcount_total;
-			const int v2 = *(it++)+vcount_total;
-			const int v3 = *(it++)+vcount_total;
-			fObj << "f " << v1 << "//" << v1 << " " << v2 << "//" << v2 << " " << v3 << "//" << v3 << std::endl;
-		}
-        vcount_total += vcount;
-
-		const int progress = IfcGeomObjects::Progress() / 2;
-		if ( old_progress!= progress ) std::cout << "\r[" << std::string(progress,'#') << std::string(50 - progress,' ') << "]" << std::flush;
-		old_progress = progress;
-	
-	} while ( IfcGeomObjects::Next() );
-	std::cout << "\rDone creating geometry                                " << std::endl;
-
-	// Writes the material settings, defined in Materials.h
-	fMtl << "# File generated by IfcOpenShell " << IFCOPENSHELL_VERSION << std::endl;
-	for( std::set<std::string>::iterator it = materials.begin(); it != materials.end(); ++ it ) {
-		fMtl << GetMaterial(*it);
-	}
-
-	std::string log = ss.str();
-	if ( log.size() ) {
-		std::cout << std::endl << "Log:" << std::endl;
-		std::cout << ss.str();
-	}
-
-	time(&end);
-	int dif = (int) difftime (end,start);	
-	printf ("\nConversion took %d seconds\n", dif );
-}

src/ifcobj/Materials.cpp

@@ -1,5 +0,0 @@
-#include "../IfcObj/Materials.h"
-
-void InitMaterials() {
-	materials["IFCSITE"] = ObjMaterial("IFCSITE",0.7f,0.8f,0.5f);
-}

src/ifcobj/ObjMaterials.h

@@ -1,64 +0,0 @@
-/********************************************************************************
- *                                                                              *
- * This file is part of IfcOpenShell.                                           *
- *                                                                              *
- * IfcOpenShell is free software: you can redistribute it and/or modify         *
- * it under the terms of the Lesser GNU General Public License as published by  *
- * the Free Software Foundation, either version 3.0 of the License, or          *
- * (at your option) any later version.                                          *
- *                                                                              *
- * IfcOpenShell is distributed in the hope that it will be useful,              *
- * but WITHOUT ANY WARRANTY; without even the implied warranty of               *
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                 *
- * Lesser GNU General Public License for more details.                          *
- *                                                                              *
- * You should have received a copy of the Lesser GNU General Public License     *
- * along with this program. If not, see <http://www.gnu.org/licenses/>.         *
- *                                                                              *
- ********************************************************************************/
-
-/********************************************************************************
- *                                                                              *
- * This file defines materials in .mtl format for several IFC datatypes         *
- *                                                                              *
- ********************************************************************************/
-
-#include <string>
-#include <sstream>
-
-class ObjMaterial {
-private:
-	std::string data;
-public:
-	ObjMaterial(const std::string& name,
-		double Kd_r = 0.7f,double Kd_g = 0.7f,double Kd_b = 0.7f,
-		double Ks_r = 0.2f,double Ks_g = 0.2f,double Ks_b = 0.2f, 
-		double Ka_r = 0.1f,double Ka_g = 0.1f,double Ka_b = 0.1f,
-		double Ns = 10.0f, double Tr = 1.0f) {
-			std::stringstream ss;
-			ss << "newmtl " << name << std::endl;
-			ss << "Kd " << Kd_r << " " << Kd_g << " " << Kd_b << std::endl;
-			ss << "Ks " << Ks_r << " " << Ks_g << " " << Ks_b << std::endl;
-			ss << "Ka " << Ka_r << " " << Ka_g << " " << Ka_b << std::endl;
-			ss << "Ns " << Ns << std::endl;
-			ss << "Tr " << Tr << std::endl;
-			ss << "d " << Tr << std::endl;
-			ss << "D " << Tr << std::endl;
-			data = ss.str();
-	}
-	friend ostream& operator<<(ostream& o, const ObjMaterial& m) {o << m.data; return o;}
-};
-
-ObjMaterial GetMaterial(const std::string& s) {
-	if ( s == "IfcSite" ) { return ObjMaterial("IfcSite",0.75f,0.8f,0.65f); }
-	if ( s == "IfcSlab" ) { return ObjMaterial("IfcSlab",0.4f,0.4f,0.4f); }
-	if ( s == "IfcWallStandardCase" ) { return ObjMaterial("IfcWallStandardCase",0.9f,0.9f,0.9f); }
-	if ( s == "IfcWall" ) { return ObjMaterial("IfcWall",0.9f,0.9f,0.9f); }
-	if ( s == "IfcWindow" ) { return ObjMaterial("IfcWindow",0.75f,0.8f,0.75f,1.0f,1.0f,1.0f,0.0f,0.0f,0.0f,500.0f,0.3f); }
-	if ( s == "IfcDoor" ) { return ObjMaterial("IfcDoor",0.55f,0.3f,0.15f); }
-	if ( s == "IfcBeam" ) { return ObjMaterial("IfcBeam",0.75f,0.7f,0.7f); }
-	if ( s == "IfcRailing" ) { return ObjMaterial("IfcRailing",0.65f,0.6f,0.6f); }
-	if ( s == "IfcMember" ) { return ObjMaterial("IfcMember",0.65f,0.6f,0.6f); }
-	if ( s == "IfcPlate" ) { return ObjMaterial("IfcPlate",0.8f,0.8f,0.8f); }
-	return ObjMaterial(s);
-}

src/ifcopenshell-python/ifcopenshell/__init__.py

@@ -0,0 +1,133 @@
+###############################################################################
+#                                                                             #
+# This file is part of IfcOpenShell.                                          #
+#                                                                             #
+# IfcOpenShell is free software: you can redistribute it and/or modify        #
+# it under the terms of the Lesser GNU General Public License as published by #
+# the Free Software Foundation, either version 3.0 of the License, or         #
+# (at your option) any later version.                                         #
+#                                                                             #
+# IfcOpenShell is distributed in the hope that it will be useful,             #
+# but WITHOUT ANY WARRANTY; without even the implied warranty of              #
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                #
+# Lesser GNU General Public License for more details.                         #
+#                                                                             #
+# You should have received a copy of the Lesser GNU General Public License    #
+# along with this program. If not, see <http://www.gnu.org/licenses/>.        #
+#                                                                             #
+###############################################################################
+
+import os
+import sys
+import platform
+import functools
+import itertools
+
+from functools import reduce
+
+from . import guid
+
+python_distribution = os.path.join(platform.system().lower(),
+	platform.architecture()[0],
+	'python%s.%s' % platform.python_version_tuple()[:2])
+sys.path.append(os.path.abspath(os.path.join(
+	os.path.dirname(__file__),
+	'lib', python_distribution)))
+
+try:
+	from . import ifcopenshell_wrapper
+except:
+	raise ImportError("IfcOpenShell not built for '%s'" % python_distribution)
+
+class entity_instance(object):
+	def __init__(self, e):
+		super(entity_instance, self).__setattr__('wrapped_data', e)
+	def __getattr__(self, name):
+		try: return entity_instance.wrap_value(self.wrapped_data.get_argument(self.wrapped_data.get_argument_index(name)))
+		except:
+			try: return entity_instance.wrap_value(self.wrapped_data.get_inverse(name))
+			except: raise AttributeError("entity instance of type '%s' has no attribute '%s'"%(self.wrapped_data.is_a(), name))
+	@staticmethod
+	def map_value(v):
+		if isinstance(v, entity_instance): return v.wrapped_data
+		elif isinstance(v, (tuple, list)) and len(v):
+			classes = list(map(type, v))
+			if float in classes: return ifcopenshell_wrapper.double_vector(v)
+			elif int in classes: return ifcopenshell_wrapper.int_vector(v)
+			elif str in classes: return ifcopenshell_wrapper.string_vector(v)
+			elif entity_instance in classes: return list(map(lambda e: e.wrapped_data, v))
+		return v
+	@staticmethod
+	def wrap_value(v):
+		wrap = lambda e: entity_instance(e)
+		if isinstance(v, ifcopenshell_wrapper.entity_instance): return wrap(v)
+		elif isinstance(v, (tuple, list)) and len(v):
+			classes = list(map(type, v))
+			if ifcopenshell_wrapper.entity_instance in classes: return list(map(wrap, v))
+		return v
+	def attribute_type(self, attr):
+		attr_idx = attr if isinstance(attr, int) else self.wrapped_data.get_argument_index(attr)
+		return self.wrapped_data.get_argument_type(attr_idx)
+	def attribute_name(self, attr_idx):
+		return self.wrapped_data.get_argument_name(attr_idx)
+	def __setattr__(self, key, value):
+		self[self.wrapped_data.get_argument_index(key)] = value
+	def __getitem__(self, key):
+		return entity_instance.wrap_value(self.wrapped_data.get_argument(key))
+	def __setitem__(self, idx, value):
+		self.wrapped_data.set_argument(idx, entity_instance.map_value(value))
+	def __len__(self): return len(self.wrapped_data)
+	def __repr__(self): return repr(self.wrapped_data)
+	def is_a(self, *args): return self.wrapped_data.is_a(*args)
+	def id(self): return self.wrapped_data.id()
+	def __dir__(self):
+		return sorted(set(itertools.chain(
+			dir(type(self)),
+			self.wrapped_data.get_attribute_names(),
+			self.wrapped_data.get_inverse_attribute_names()
+		)))
+
+
+class file(object):
+	def __init__(self, f=None):
+		self.wrapped_data = f or ifcopenshell_wrapper.file(True)
+	def create_entity(self,type,*args,**kwargs):
+		e = entity_instance(ifcopenshell_wrapper.entity_instance(type))
+		attrs = list(enumerate(args)) + \
+			[(e.wrapped_data.get_argument_index(name), arg) for name, arg in kwargs.items()]
+		for idx, arg in attrs: e[idx] = arg
+		self.wrapped_data.add(e.wrapped_data)
+		e.wrapped_data.this.disown()
+		return e
+	def __getattr__(self, attr):
+		if attr[0:6] == 'create': return functools.partial(self.create_entity,attr[6:])
+		else: return getattr(self.wrapped_data, attr)
+	def __getitem__(self, key):
+		if isinstance(key, int):
+			return entity_instance(self.wrapped_data.by_id(key))
+		elif isinstance(key, str):
+			return entity_instance(self.wrapped_data.by_guid(key))
+	def add(self, inst):
+		inst.wrapped_data.this.disown()
+		return entity_instance(self.wrapped_data.add(inst.wrapped_data))
+	def by_type(self, type):
+		return [entity_instance(e) for e in self.wrapped_data.by_type(type)]
+	def traverse(self, inst):
+		return [entity_instance(e) for e in self.wrapped_data.traverse(inst.wrapped_data)]
+	def remove(self, inst):
+		return self.wrapped_data.remove(inst.wrapped_data)
+	def __iter__(self):
+		return iter(self[id] for id in self.wrapped_data.entity_names())
+
+
+def open(fn=None):
+	return file(ifcopenshell_wrapper.open(os.path.abspath(fn))) if fn else file()
+
+
+def create_entity(type,*args,**kwargs):
+	e = entity_instance(ifcopenshell_wrapper.entity_instance(type))
+	attrs = list(enumerate(args)) + \
+		[(e.wrapped_data.get_argument_index(name), arg) for name, arg in kwargs.items()]
+	for idx, arg in attrs: e[idx] = arg
+	return e
+

src/ifcopenshell-python/ifcopenshell/geom/__init__.py

@@ -0,0 +1,82 @@
+###############################################################################
+#                                                                             #
+# This file is part of IfcOpenShell.                                          #
+#                                                                             #
+# IfcOpenShell is free software: you can redistribute it and/or modify        #
+# it under the terms of the Lesser GNU General Public License as published by #
+# the Free Software Foundation, either version 3.0 of the License, or         #
+# (at your option) any later version.                                         #
+#                                                                             #
+# IfcOpenShell is distributed in the hope that it will be useful,             #
+# but WITHOUT ANY WARRANTY; without even the implied warranty of              #
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                #
+# Lesser GNU General Public License for more details.                         #
+#                                                                             #
+# You should have received a copy of the Lesser GNU General Public License    #
+# along with this program. If not, see <http://www.gnu.org/licenses/>.        #
+#                                                                             #
+###############################################################################
+
+import os
+import sys
+
+from .. import ifcopenshell_wrapper
+
+def has_occ():
+    try: import OCC.BRepTools
+    except: return False
+    return True
+
+
+has_occ = has_occ()
+wrap_shape_creation = lambda settings, shape: shape
+if has_occ:
+    import occ_utils as utils
+    wrap_shape_creation = lambda settings, shape: utils.create_shape_from_serialization(shape) if getattr(settings, 'use_python_opencascade', False) else shape
+
+
+# Subclass the settings module to provide an additional
+# setting to enable pythonOCC when available
+class settings(ifcopenshell_wrapper.settings):
+    if has_occ:
+        USE_PYTHON_OPENCASCADE = -1
+        def set(self, *args):
+            setting, value = args
+            if setting == settings.USE_PYTHON_OPENCASCADE:
+                self.set(settings.USE_BREP_DATA, value)
+                self.set(settings.USE_WORLD_COORDS, value)
+                self.set(settings.DISABLE_TRIANGULATION, value)
+                self.use_python_opencascade = value
+            else:
+                ifcopenshell_wrapper.settings.set(self, *args)
+
+
+# Hide templating precision to the user by choosing based on Python's 
+# internal float type. This is probably always going to be a double.
+for ty in (ifcopenshell_wrapper.iterator_single_precision, ifcopenshell_wrapper.iterator_double_precision):
+    if ty.mantissa_size() == sys.float_info.mant_dig: 
+        _iterator = ty
+
+
+# Make sure people are able to use python's platform agnostic paths
+class iterator(_iterator):
+    def __init__(self, settings, filename):
+        self.settings = settings
+        _iterator.__init__(self, settings, os.path.abspath(filename))
+    if has_occ:
+        def get(self):
+            return wrap_shape_creation(self.settings, _iterator.get(self))
+
+
+def create_shape(settings, inst): 
+    return wrap_shape_creation(settings, ifcopenshell_wrapper.create_shape(settings, inst.wrapped_data))
+
+
+def iterate(settings, filename):
+    it = iterator(settings, filename)
+    if it.findContext():
+        while True:
+            yield it.get()
+            if not it.next(): break
+
+

src/ifcopenshell-python/ifcopenshell/geom/occ_utils.py

@@ -0,0 +1,66 @@
+import random
+from collections import namedtuple
+
+import OCC.gp
+import OCC.V3d
+import OCC.Quantity
+import OCC.BRepTools
+import OCC.Display.SimpleGui
+
+tuple = namedtuple('shape', ('data', 'geometry'))
+
+handle, main_loop, add_menu, add_function_to_menu = None, None, None, None
+
+def initialize_display():
+    global handle, main_loop, add_menu, add_function_to_menu
+    handle, main_loop, add_menu, add_function_to_menu = OCC.Display.SimpleGui.init_display()
+
+    def setup():
+        viewer_handle = handle.GetViewer()
+        viewer = viewer_handle.GetObject()
+        while True:
+            viewer.InitActiveLights()
+            try: active_light = viewer.ActiveLight()
+            except: break
+            viewer.DelLight(active_light)
+            viewer.NextActiveLights()
+        for dir in [(1,2,-3), (-2,-1,1)]:
+            light = OCC.V3d.V3d_DirectionalLight(viewer_handle)
+            light.SetDirection(*dir)
+            viewer.SetLightOn(light.GetHandle())
+    setup()
+    return handle
+
+
+def display_shape(shape, clr=None):
+    if not clr: 
+        r = lambda: random.random() * 0.3 + 0.7
+        clr = OCC.Quantity.Quantity_Color(r(), r(), r(), OCC.Quantity.Quantity_TOC_RGB)
+    return handle.DisplayShape(shape, color=clr, update=True)
+
+
+def set_shape_transparency(ais, t):
+    handle.Context.SetTransparency(ais, t)
+
+
+def get_bounding_box_center(bbox):
+    bbmin = [0.]*3; bbmax = [0.]*3
+    bbmin[0], bbmin[1], bbmin[2], bbmax[0], bbmax[1], bbmax[2] = bbox.Get()
+    return OCC.gp.gp_Pnt(*map(lambda xy: (xy[0]+xy[1])/2., zip(bbmin, bbmax)))
+
+
+def create_shape_from_serialization(brep_object):
+    brep_data, occ_shape = None, None
+    
+    try: brep_data = brep_object.geometry.brep_data
+    except: pass    
+    if not brep_data: return tuple(brep_object, None)
+    
+    try:
+        ss = OCC.BRepTools.BRepTools_ShapeSet()
+        ss.ReadFromString(brep_data)
+        occ_shape = ss.Shape(ss.NbShapes())
+    except: pass
+    
+    return tuple(brep_object, occ_shape)
+

src/ifcopenshell-python/ifcopenshell/guid.py

@@ -0,0 +1,43 @@
+###############################################################################
+#                                                                             #
+# This file is part of IfcOpenShell.                                          #
+#                                                                             #
+# IfcOpenShell is free software: you can redistribute it and/or modify        #
+# it under the terms of the Lesser GNU General Public License as published by #
+# the Free Software Foundation, either version 3.0 of the License, or         #
+# (at your option) any later version.                                         #
+#                                                                             #
+# IfcOpenShell is distributed in the hope that it will be useful,             #
+# but WITHOUT ANY WARRANTY; without even the implied warranty of              #
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                #
+# Lesser GNU General Public License for more details.                         #
+#                                                                             #
+# You should have received a copy of the Lesser GNU General Public License    #
+# along with this program. If not, see <http://www.gnu.org/licenses/>.        #
+#                                                                             #
+###############################################################################
+
+import string
+
+from functools import reduce
+
+chars = string.digits + string.ascii_uppercase + string.ascii_lowercase + '_$'
+
+def compress(g):
+    bs = [int(g[i:i+2], 16) for i in range(0, len(g), 2)]
+    def b64(v, l=4):
+        return ''.join([chars[(v // (64**i))%64] for i in range(l)][::-1])
+    return ''.join([b64(bs[0], 2)] + [b64((bs[i] << 16) + (bs[i+1] << 8) + bs[i+2]) for i in range(1,16,3)])
+
+def expand(g):
+    def b64(v):
+        return reduce(lambda a, b: a * 64 + b, map(lambda c: chars.index(c), v))
+    bs = [b64(g[0:2])]
+    for i in range(5):
+        d = b64(g[2+4*i:6+4*i])
+        bs += [(d >> (8*(2-j)))%256 for j in range(3)]
+    return ''.join(['%02x'%b for b in bs])
+
+def split(g):
+    return '{%s-%s-%s-%s-%s}'%(g[:8], g[8:12], g[12:16], g[16:20], g[20:])
+

src/ifcparse/Ifc2x3-latebound.h

@@ -19,30 +19,33 @@
 
 /********************************************************************************
  *                                                                              *
- * This file defines materials for use in 3ds Max for several IFC datatypes     *
+ * This file has been generated from IFC2X3_TC1.exp. Do not make modifications  *
+ * but instead modify the python script that has been used to generate this.    *
  *                                                                              *
  ********************************************************************************/
 
-#include <string>
+#ifndef IFC2X3RT_H
+#define IFC2X3RT_H
 
-#include "Max.h"
-#include "stdmat.h"
+#define IfcSchema Ifc2x3
 
-StdMat2* GetMaterial(const std::string& s) {
-	StdMat2* mat = NewDefaultStdMat();
-	TimeValue t (-1);
-	mat->SetSpecular(Color(0.2f,0.2f,0.2f),t);
-	mat->SetAmbient(Color(0.1f,0.1f,0.1f),t);
-	mat->SetWire( s == "IfcSpace" || s == "IfcOpeningElement" );
-	if ( s == "IfcSite" ) { mat->SetDiffuse(Color(0.75f,0.8f,0.65f),t); }
-	if ( s == "IfcSlab" ) { mat->SetDiffuse(Color(0.4f,0.4f,0.4f),t); }
-	if ( s == "IfcWallStandardCase" ) { mat->SetDiffuse(Color(0.9f,0.9f,0.9f),t); }
-	if ( s == "IfcWall" ) { mat->SetDiffuse(Color(0.9f,0.9f,0.9f),t); }
-	if ( s == "IfcWindow" ) { mat->SetDiffuse(Color(0.75f,0.8f,0.75f),t); mat->SetSpecular(Color(1.0f,1.0f,1.0f),t); 
-	mat->SetAmbient(Color(0.0f,0.0f,0.0f),t); mat->SetShininess(500.0f,t); mat->SetOpacity(0.3f,t); }
-	if ( s == "IfcDoor" ) { mat->SetDiffuse(Color(0.55f,0.3f,0.15f),t); }
-	if ( s == "IfcBeam" ) { mat->SetDiffuse(Color(0.75f,0.7f,0.7f),t); }
-	if ( s == "IfcRailing" ) { mat->SetDiffuse(Color(0.75f,0.7f,0.7f),t); }
-	if ( s == "IfcMember" ) { mat->SetDiffuse(Color(0.75f,0.7f,0.7f),t); }
-	return mat;
-}
+#include "../ifcparse/IfcUtil.h"
+#include "../ifcparse/IfcEntityDescriptor.h"
+#include "../ifcparse/IfcWritableEntity.h"
+
+namespace Ifc2x3 {
+namespace Type {
+    int GetAttributeCount(Enum t);
+    int GetAttributeIndex(Enum t, const std::string& a);
+    IfcUtil::ArgumentType GetAttributeType(Enum t, unsigned char a);
+    Enum GetAttributeEntity(Enum t, unsigned char a);
+    const std::string& GetAttributeName(Enum t, unsigned char a);
+    bool GetAttributeOptional(Enum t, unsigned char a);
+    bool GetAttributeDerived(Enum t, unsigned char a);
+    std::pair<const char*, int> GetEnumerationIndex(Enum t, const std::string& a);
+    std::pair<Enum, unsigned> GetInverseAttribute(Enum t, const std::string& a);
+    std::set<std::string> GetInverseAttributeNames(Enum t);
+    void PopulateDerivedFields(IfcWrite::IfcWritableEntity* e);
+}}
+
+#endif

src/ifcparse/Ifc4-latebound.h

@@ -0,0 +1,51 @@
+/********************************************************************************
+ *                                                                              *
+ * This file is part of IfcOpenShell.                                           *
+ *                                                                              *
+ * IfcOpenShell is free software: you can redistribute it and/or modify         *
+ * it under the terms of the Lesser GNU General Public License as published by  *
+ * the Free Software Foundation, either version 3.0 of the License, or          *
+ * (at your option) any later version.                                          *
+ *                                                                              *
+ * IfcOpenShell is distributed in the hope that it will be useful,              *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of               *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                 *
+ * Lesser GNU General Public License for more details.                          *
+ *                                                                              *
+ * You should have received a copy of the Lesser GNU General Public License     *
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.         *
+ *                                                                              *
+ ********************************************************************************/
+
+/********************************************************************************
+ *                                                                              *
+ * This file has been generated from IFC4.exp. Do not make modifications        *
+ * but instead modify the python script that has been used to generate this.    *
+ *                                                                              *
+ ********************************************************************************/
+
+#ifndef IFC4RT_H
+#define IFC4RT_H
+
+#define IfcSchema Ifc4
+
+#include "../ifcparse/IfcUtil.h"
+#include "../ifcparse/IfcEntityDescriptor.h"
+#include "../ifcparse/IfcWritableEntity.h"
+
+namespace Ifc4 {
+namespace Type {
+    int GetAttributeCount(Enum t);
+    int GetAttributeIndex(Enum t, const std::string& a);
+    IfcUtil::ArgumentType GetAttributeType(Enum t, unsigned char a);
+    Enum GetAttributeEntity(Enum t, unsigned char a);
+    const std::string& GetAttributeName(Enum t, unsigned char a);
+    bool GetAttributeOptional(Enum t, unsigned char a);
+    bool GetAttributeDerived(Enum t, unsigned char a);
+    std::pair<const char*, int> GetEnumerationIndex(Enum t, const std::string& a);
+    std::pair<Enum, unsigned> GetInverseAttribute(Enum t, const std::string& a);
+    std::set<std::string> GetInverseAttributeNames(Enum t);
+    void PopulateDerivedFields(IfcWrite::IfcWritableEntity* e);
+}}
+
+#endif

src/ifcparse/IfcCharacterDecoder.cpp

@@ -30,7 +30,7 @@
 
 #include "../ifcparse/IfcCharacterDecoder.h"
 #include "../ifcparse/IfcException.h"
-#include "../ifcparse/IfcFile.h"
+#include "../ifcparse/IfcSpfStream.h"
 
 #define FIRST_SOLIDUS						(1 << 1)
 #define PAGE								(1 << 2)
@@ -67,6 +67,7 @@
 #define CLEAR_HEX(C)						(C &= ~(HEX(1)&HEX(2)&HEX(3)&HEX(4)&HEX(5)&HEX(6)&HEX(7)&HEX(8)))
 
 using namespace IfcParse;
+using namespace IfcWrite;
 
 void IfcCharacterDecoder::addChar(std::stringstream& s,const UChar32& ch) {
 #ifdef HAVE_ICU
@@ -87,20 +88,35 @@ void IfcCharacterDecoder::addChar(std::stringstream& s,const UChar32& ch) {
 	s.put(substitution_character);
 #endif
 }
-IfcCharacterDecoder::IfcCharacterDecoder(IfcParse::File* f) {
-	file = f;
+IfcCharacterDecoder::IfcCharacterDecoder(IfcParse::IfcSpfStream* f) {
+  file = f;
 #ifdef HAVE_ICU
-	if ( ! destination && mode == UTF8 ) {
-		destination = ucnv_open("utf-8", &status);
-	} else if ( ! destination && mode == LATIN ) {
-		destination = ucnv_open("iso-8859-1", &status);
-	}
+  if (destination) ucnv_close(destination);
+  if (compatibility_converter) ucnv_close(compatibility_converter);
+  destination = 0;
+  compatibility_converter = 0;
+
+  if (mode == DEFAULT) {
+    destination = ucnv_open(0, &status);
+  } else if (mode == UTF8) {
+    destination = ucnv_open("utf-8", &status);
+  } else if (mode == LATIN) {
+    destination = ucnv_open("iso-8859-1", &status);
+  }
+  if (compatibility_charset.empty()) {
+    compatibility_charset = ucnv_getDefaultName();
+  }
+  compatibility_converter = ucnv_open(compatibility_charset.c_str(), &status);
 #endif
 }
 IfcCharacterDecoder::~IfcCharacterDecoder() {
 #ifdef HAVE_ICU
-	if ( destination ) ucnv_close(destination);
-	if ( converter ) ucnv_close(converter);
+  if ( destination ) ucnv_close(destination);
+  if ( converter ) ucnv_close(converter);
+  if ( compatibility_converter ) ucnv_close(compatibility_converter);
+  destination = 0;
+  converter = 0;
+  compatibility_converter = 0;
 #endif
 }
 IfcCharacterDecoder::operator std::string() {
@@ -111,6 +127,9 @@ IfcCharacterDecoder::operator std::string() {
 	int codepage = 1;
 	unsigned int hex = 0;
 	unsigned int hex_count = 0;
+#ifdef HAVE_ICU
+	unsigned int old_hex = 0; // for compatibility_mode
+#endif  
 	while ( current_char = file->Peek() ) {
 		if ( EXPECTS_CHARACTER(parse_state) ) {
 #ifdef HAVE_ICU
@@ -164,7 +183,24 @@ IfcCharacterDecoder::operator std::string() {
 			if ( (hex_count == 2 && !(parse_state & EXTENDED2)) ||
 				(hex_count == 4 && !(parse_state & EXTENDED4)) ||
 				(hex_count == 8) ) {
-					addChar(s,(UChar32) hex);
+#ifdef HAVE_ICU
+					if (compatibility_mode) {
+						if (old_hex == 0) {
+							old_hex = hex;
+						} else {
+							char characters[3] = { old_hex, hex };
+							const char* char_array = &characters[0];
+							UChar32 ch = ucnv_getNextUChar(compatibility_converter,&char_array,char_array+2,&status);
+							addChar(s,ch);
+							old_hex = 0;
+						}
+					}
+					else {
+#endif
+						addChar(s,(UChar32) hex);
+#ifdef HAVE_ICU
+					}
+#endif
 					if ( hex_count == 2 ) parse_state = 0;
 					else CLEAR_HEX(parse_state);
 					hex = hex_count = 0;
@@ -177,8 +213,8 @@ IfcCharacterDecoder::operator std::string() {
 				throw IfcException("Invalid character encountered");
 		} else {
 			parse_state = hex = hex_count = 0;
-            // NOTE: this is in fact wrong, this ought to be the representation of the character.
-            // In UTF-8 this is the same, but we should not rely on that.
+			// NOTE: this is in fact wrong, this ought to be the representation of the character.
+			// In UTF-8 this is the same, but we should not rely on that.
 			s.put(current_char);
 		}
 		file->Inc();
@@ -246,9 +282,86 @@ void IfcCharacterDecoder::dryRun() {
 #ifdef HAVE_ICU
 UConverter* IfcCharacterDecoder::destination = 0;
 UConverter* IfcCharacterDecoder::converter = 0;
+UConverter* IfcCharacterDecoder::compatibility_converter = 0;
 int IfcCharacterDecoder::previous_codepage = -1;
 UErrorCode IfcCharacterDecoder::status = U_ZERO_ERROR;
+#endif
+
+#ifdef HAVE_ICU
 IfcCharacterDecoder::ConversionMode IfcCharacterDecoder::mode = IfcCharacterDecoder::JSON;
+
+// Many BIM software (eg. Revit, ArchiCAD, ...) has wrong behavior  
+bool IfcCharacterDecoder::compatibility_mode = false;
+std::string IfcCharacterDecoder::compatibility_charset = "";
+
 #else
 char IfcCharacterDecoder::substitution_character = '_';
 #endif
+
+
+IfcCharacterEncoder::IfcCharacterEncoder(const std::string& input) {
+#ifdef HAVE_ICU
+	if ( !converter) converter = ucnv_open("utf-8", &status);
+#endif
+	str = input;
+}
+
+IfcCharacterEncoder::~IfcCharacterEncoder() {
+#ifdef HAVE_ICU
+	if ( !converter) ucnv_close(converter);
+	converter = 0;
+#endif
+}
+
+IfcCharacterEncoder::operator std::string() {
+	std::ostringstream oss;
+	oss.put('\'');
+#ifdef HAVE_ICU
+	// Either 2 or 4 to uses \X2 or \X4 respectively.
+	// Currently hardcoded to 4, but \X2 might be  
+	// sufficient for nearly all purposes.
+	const int num_bytes = 4; 
+	const std::string num_bytes_str = std::string(1,num_bytes + 0x30);
+
+
+	UChar32 ch;
+
+	const char* source = str.c_str();
+	const char* limit = source + str.size();
+	
+	bool in_extended = false;
+
+	while(source < limit) {
+		ch = ucnv_getNextUChar(converter, &source, limit, &status);
+		const bool within_spf_range = ch >= 0x20 && ch <= 0x7e;
+		if ( in_extended && within_spf_range ) {
+			oss << "\\X0\\";
+		} else if ( !in_extended && !within_spf_range ) {
+			oss << "\\X" << num_bytes_str << "\\";
+		}
+		if ( within_spf_range ) {
+			oss.put(ch);
+			if ( ch == '\\' || ch == '\'' ) oss.put(ch);
+		} else {
+			oss << std::hex << std::setw(num_bytes*2) << std::uppercase << std::setfill('0') << (int) ch;
+		}
+		in_extended = !within_spf_range;
+	}
+
+	if ( in_extended ) oss << "\\X0\\";
+#else
+	for (std::string::const_iterator i = str.begin(); i != str.end(); ++i) {
+		char ch = *i;
+		if ( ch == '\\' || ch == '\'' ) oss.put(ch);
+		oss.put(ch);
+	}
+#endif
+	oss.put('\'');
+	return oss.str();
+}
+
+
+#ifdef HAVE_ICU
+UErrorCode IfcCharacterEncoder::status = U_ZERO_ERROR;
+UConverter* IfcCharacterEncoder::converter = 0;
+#endif

src/ifcparse/IfcCharacterDecoder.h

@@ -1,29 +1,29 @@
+/********************************************************************************
+*                                                                              *
+* This file is part of IfcOpenShell.                                           *
+*                                                                              *
+* IfcOpenShell is free software: you can redistribute it and/or modify         *
+* it under the terms of the Lesser GNU General Public License as published by  *
+* the Free Software Foundation, either version 3.0 of the License, or          *
+* (at your option) any later version.                                          *
+*                                                                              *
+* IfcOpenShell is distributed in the hope that it will be useful,              *
+* but WITHOUT ANY WARRANTY; without even the implied warranty of               *
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                 *
+* Lesser GNU General Public License for more details.                          *
+*                                                                              *
+* You should have received a copy of the Lesser GNU General Public License     *
+* along with this program. If not, see <http://www.gnu.org/licenses/>.         *
+*                                                                              *
+********************************************************************************/
+
 /********************************************************************************
- *                                                                              *
- * This file is part of IfcOpenShell.                                           *
- *                                                                              *
- * IfcOpenShell is free software: you can redistribute it and/or modify         *
- * it under the terms of the Lesser GNU General Public License as published by  *
- * the Free Software Foundation, either version 3.0 of the License, or          *
- * (at your option) any later version.                                          *
- *                                                                              *
- * IfcOpenShell is distributed in the hope that it will be useful,              *
- * but WITHOUT ANY WARRANTY; without even the implied warranty of               *
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                 *
- * Lesser GNU General Public License for more details.                          *
- *                                                                              *
- * You should have received a copy of the Lesser GNU General Public License     *
- * along with this program. If not, see <http://www.gnu.org/licenses/>.         *
- *                                                                              *
- ********************************************************************************/
- 
- /********************************************************************************
- *                                                                               *
- * Implementation of character decoding as described in ISO 10303-21 table 2 and *
- * table 4                                                                       *
- *                                                                               *
- ********************************************************************************/
- 
+*                                                                               *
+* Implementation of character decoding as described in ISO 10303-21 table 2 and *
+* table 4                                                                       *
+*                                                                               *
+********************************************************************************/
+
 #ifndef IFCCHARACTERDECODER_H
 #define IFCCHARACTERDECODER_H
 
@@ -36,28 +36,36 @@
 typedef unsigned int UChar32;
 #endif
 
-#include "../ifcparse/IfcFile.h"
+#include "../ifcparse/IfcSpfStream.h"
 
 namespace IfcParse {
 
 	class IfcCharacterDecoder {
 	private:
-		IfcParse::File* file;
+		IfcParse::IfcSpfStream* file;
 #ifdef HAVE_ICU
 		static UConverter* destination;
 		static UConverter* converter;
+		static UConverter* compatibility_converter;
 		static int previous_codepage;
 		static UErrorCode status;
 #endif
 		void addChar(std::stringstream& s,const UChar32& ch);
 	public:
 #ifdef HAVE_ICU
-		enum ConversionMode {UTF8,LATIN,JSON,PYTHON};
+		enum ConversionMode {DEFAULT,UTF8,LATIN,JSON,PYTHON};
 		static ConversionMode mode;
+
+		// Many BIM software (eg. Revit, ArchiCAD, ...) has wrong behavior to encode characters.
+		// It just translate to extended string in system default code page, not unicode.
+		// If you want to process these strings, set true.
+		static bool compatibility_mode;
+		static std::string compatibility_charset;
+
 #else
 		static char substitution_character;
 #endif
-		IfcCharacterDecoder(IfcParse::File* file);
+		IfcCharacterDecoder(IfcParse::IfcSpfStream* file);
 		~IfcCharacterDecoder();
 		void dryRun();
 		operator std::string();
@@ -65,4 +73,21 @@ namespace IfcParse {
 
 }
 
+namespace IfcWrite {
+
+	class IfcCharacterEncoder {
+	private:
+		std::string str;
+#ifdef HAVE_ICU
+		static UErrorCode status;
+		static UConverter* converter;
+#endif
+	public:
+		IfcCharacterEncoder(const std::string& input);
+		~IfcCharacterEncoder();
+		operator std::string();
+	};
+
+}
+
 #endif

src/ifcparse/IfcEntityDescriptor.h

@@ -0,0 +1,132 @@
+/********************************************************************************
+ *                                                                              *
+ * This file is part of IfcOpenShell.                                           *
+ *                                                                              *
+ * IfcOpenShell is free software: you can redistribute it and/or modify         *
+ * it under the terms of the Lesser GNU General Public License as published by  *
+ * the Free Software Foundation, either version 3.0 of the License, or          *
+ * (at your option) any later version.                                          *
+ *                                                                              *
+ * IfcOpenShell is distributed in the hope that it will be useful,              *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of               *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                 *
+ * Lesser GNU General Public License for more details.                          *
+ *                                                                              *
+ * You should have received a copy of the Lesser GNU General Public License     *
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.         *
+ *                                                                              *
+ ********************************************************************************/
+
+#ifndef IFCENTITYDESCRIPTOR_H
+#define IFCENTITYDESCRIPTOR_H
+
+#include <string>
+#include <vector>
+#include <sstream>
+#include <iostream>
+#include <algorithm>
+
+#include "../ifcparse/SharedPointer.h"
+#include "../ifcparse/IfcUtil.h"
+#include "../ifcparse/IfcException.h"
+
+#ifdef USE_IFC4
+#include "../ifcparse/Ifc4enum.h"
+#else
+#include "../ifcparse/Ifc2x3enum.h"
+#endif
+
+namespace IfcUtil {
+
+	class IfcEnumerationDescriptor {
+	private:
+		IfcSchema::Type::Enum type;
+		std::vector<std::string> values;
+	public:
+		IfcEnumerationDescriptor(IfcSchema::Type::Enum type, const std::vector<std::string>& values)
+			: type(type), values(values) {}
+		std::pair<const char*, int> getIndex(const std::string& value) const {
+			std::vector<std::string>::const_iterator it = std::find(values.begin(), values.end(), value);
+			if (it != values.end()) {
+				return std::make_pair(it->c_str(), std::distance(it, values.begin()));
+			} else {
+				throw IfcParse::IfcException("Invalid enumeration value");
+			}
+		}
+		const std::vector<std::string>& getValues() {
+			return values;
+		}
+		IfcSchema::Type::Enum getType() {
+			return type;
+		}
+	};
+
+	class IfcEntityDescriptor {
+	public:
+		class IfcArgumentDescriptor
+		{
+		public:
+			std::string name;
+			bool optional;
+			ArgumentType argument_type;
+			IfcSchema::Type::Enum data_type;
+			IfcArgumentDescriptor(const std::string& name, bool optional, ArgumentType argument_type, IfcSchema::Type::Enum data_type)
+				: name(name), optional(optional), argument_type(argument_type), data_type(data_type) {}
+		};
+	private:
+		IfcSchema::Type::Enum type;
+		IfcEntityDescriptor* parent;
+		std::vector<IfcArgumentDescriptor> arguments;
+		unsigned argument_start() const {
+			return parent ? parent->getArgumentCount() : 0;
+		}
+		const IfcArgumentDescriptor& get_argument(unsigned i) const {
+			if (i < arguments.size()) return arguments[i];
+			else throw IfcParse::IfcException("Argument out of range");
+		}
+	public:
+		IfcEntityDescriptor(IfcSchema::Type::Enum type, IfcEntityDescriptor* parent)
+			: type(type), parent(parent) {}
+		void add(const std::string& name, bool optional, ArgumentType argument_type, IfcSchema::Type::Enum data_type = IfcSchema::Type::UNDEFINED) {
+			arguments.push_back(IfcArgumentDescriptor(name, optional, argument_type, data_type));
+		}
+		unsigned getArgumentCount() const {
+			return (parent ? parent->getArgumentCount() : 0) + arguments.size();
+		}
+		const std::string& getArgumentName(unsigned i) const {
+			const unsigned a = argument_start();
+			return i < a
+				? parent->getArgumentName(i)
+				: get_argument(i-a).name;
+		}
+		ArgumentType getArgumentType(unsigned i) const {
+			const unsigned a = argument_start();
+			return i < a
+				? parent->getArgumentType(i)
+				: get_argument(i-a).argument_type;
+		}
+		bool getArgumentOptional(unsigned i) const {
+			const unsigned a = argument_start();
+			return i < a
+				? parent->getArgumentOptional(i)
+				: get_argument(i-a).optional;
+		}
+		IfcSchema::Type::Enum getArgumentEntity(unsigned i) const {
+			const unsigned a = argument_start();
+			return i < a
+				? parent->getArgumentEntity(i)
+				: get_argument(i-a).data_type;
+		}
+		unsigned getArgumentIndex(const std::string& s) const {
+			unsigned a = argument_start();
+			for(std::vector<IfcArgumentDescriptor>::const_iterator i = arguments.begin(); i != arguments.end(); ++i) {
+				if (i->name == s) return a;
+				a++;
+			}
+			if (parent) return parent->getArgumentIndex(s);
+			throw IfcParse::IfcException(std::string("Argument ") + s + " not found on " + IfcSchema::Type::ToString(type));
+		}		
+	};   
+}
+
+#endif

src/ifcparse/IfcException.h

@@ -1,4 +1,4 @@
-/********************************************************************************
+/********************************************************************************
  *                                                                              *
  * This file is part of IfcOpenShell.                                           *
  *                                                                              *

src/ifcparse/IfcFile.h

@@ -16,66 +16,123 @@
  * along with this program. If not, see <http://www.gnu.org/licenses/>.         *
  *                                                                              *
  ********************************************************************************/
- 
- /********************************************************************************
- *                                                                               *
- * Reads a file in chunks of BUF_SIZE and provides functions to access its       *
- * contents randomly and character by character                                  *
- *                                                                               *
- ********************************************************************************/
- 
+
 #ifndef IFCFILE_H
 #define IFCFILE_H
 
-#include <fstream>
-#include <string>
+#include <map>
+#include <set>
 
-// As of IfcOpenShell version 0.3.0 the paging functionality, which
-// loads a file on disk into multiple chunks, has been disabled.
-// It proved to be an inefficient way of working with large files,
-// as often these did not facilitate to be parsed in a sequential 
-// manner efficiently, to enable the paging functionality uncomment
-// the following statement.
-//const int BUF_SIZE = (128 * 1024 * 1024);
+#include "../ifcparse/IfcParse.h"
+#include "../ifcparse/IfcSpfHeader.h"
 
 namespace IfcParse {
-	/// The File class represents a ISO 10303-21 IFC-SPF file in memory.
-	/// The file is interpreted as a sequence of tokens which are lazily
-	/// interpreted only when requested. If the size of the file is
-	/// larger than BUF_SIZE, the file is split into seperate pages, of
-	/// which only one is simultaneously kept in memory, for files
-	/// that define their entities not in a sequential nature, this is
-	/// detrimental for the performance of the parser.
-	class File {
-	private:
-		std::ifstream stream;
-		char* buffer;
-		unsigned int ptr;
-		unsigned int len;
-		void ReadBuffer(bool inc=true);
-#ifdef BUF_SIZE
-		unsigned int offset;
-		bool paging;
-#endif
-	public:
-		bool valid;
-		bool eof;
-		unsigned int size;
-		File(const std::string& fn);
-		File(std::istream& f, int len);
-		File(void* data, int len);
-		/// Returns the character at the cursor 
-		char Peek();
-		/// Returns the character at specified offset
-		char Read(unsigned int offset);
-		/// Increment the file cursor and reads new page if necessary
-		void Inc();
-		void Close();
-		/// Moves the file cursor to an arbitrary offset in the file
-		void Seek(unsigned int offset);
-		/// Returns the cursor position
-		unsigned int Tell();
-	};
+
+/// This class provides several static convenience functions and variables
+/// and provide access to the entities in an IFC file
+class IfcFile {
+public:
+	typedef std::map<IfcSchema::Type::Enum, IfcEntityList::ptr> entities_by_type_t;
+	typedef std::map<unsigned int, IfcUtil::IfcBaseClass*> entity_by_id_t;
+	typedef std::map<std::string, IfcSchema::IfcRoot*> entity_by_guid_t;
+	typedef std::map<unsigned int, IfcEntityList::ptr> entities_by_ref_t;
+	typedef std::map<unsigned int, unsigned int> offset_by_id_t;
+	typedef entity_by_id_t::const_iterator const_iterator;
+private:
+	typedef std::map<IfcUtil::IfcBaseClass*, IfcUtil::IfcBaseClass*> entity_entity_map_t;
+
+	bool _create_latebound_entities;
+
+	entity_by_id_t byid;
+	entities_by_type_t bytype;
+	entities_by_ref_t byref;
+	entity_by_guid_t byguid;
+	offset_by_id_t offsets;
+
+	entity_entity_map_t entity_file_map;
+
+	unsigned int lastId;
+	unsigned int MaxId;
+
+	IfcSpfHeader _header;
+
+	void setDefaultHeaderValues();
+	void traverse(IfcUtil::IfcBaseClass*, std::set<IfcUtil::IfcBaseClass*>& visited, IfcEntityList::ptr list, int level, int max_level);
+public:
+	IfcParse::IfcSpfLexer* tokens;
+	IfcParse::IfcSpfStream* stream;
+	
+	IfcFile(bool create_latebound_entities = false);
+	~IfcFile();
+	
+	/// Returns the first entity in the file, this probably is the entity
+	/// with the lowest id (EXPRESS ENTITY_INSTANCE_NAME)
+	const_iterator begin() const;
+	/// Returns the last entity in the file, this probably is the entity
+	/// with the highest id (EXPRESS ENTITY_INSTANCE_NAME)
+	const_iterator end() const;
+	
+	/// Returns all entities in the file that match the template argument.
+	/// NOTE: This also returns subtypes of the requested type, for example:
+	/// IfcWall will also return IfcWallStandardCase entities
+	template <class T>
+	typename T::list::ptr entitiesByType() {
+		IfcEntityList::ptr untyped_list = entitiesByType(T::Class());
+		if (untyped_list) {
+			return untyped_list->as<T>();
+		} else {
+			return typename T::list::ptr(new typename T::list);
+		}
+	}
+
+	/// Returns all entities in the file that match the positional argument.
+	/// NOTE: This also returns subtypes of the requested type, for example:
+	/// IfcWall will also return IfcWallStandardCase entities
+	IfcEntityList::ptr entitiesByType(IfcSchema::Type::Enum t);
+
+	/// Returns all entities in the file that match the positional argument.
+	/// NOTE: This also returns subtypes of the requested type, for example:
+	/// IfcWall will also return IfcWallStandardCase entities
+	IfcEntityList::ptr entitiesByType(const std::string& t);
+
+	/// Returns all entities in the file that reference the id
+	IfcEntityList::ptr entitiesByReference(int id);
+
+	/// Returns the entity with the specified id
+	IfcUtil::IfcBaseClass* entityById(int id);
+
+	/// Returns the entity with the specified GlobalId
+	IfcSchema::IfcRoot* entityByGuid(const std::string& guid);
+
+	/// Performs a depth-first traversal, returning all entity instance
+	/// attributes as a flat list. NB: includes the root instance specified
+	/// in the first function argument.
+	IfcEntityList::ptr traverse(IfcUtil::IfcBaseClass* instance, int max_level=-1);
+
+	bool Init(const std::string& fn);
+	bool Init(std::istream& fn, int len);
+	bool Init(void* data, int len);
+	bool Init(IfcParse::IfcSpfStream* f);
+
+	IfcEntityList::ptr getInverse(int instance_id, IfcSchema::Type::Enum type, int attribute_index);
+
+	unsigned int FreshId() { return ++MaxId; }
+
+	IfcUtil::IfcBaseClass* addEntity(IfcUtil::IfcBaseClass* entity);
+	void addEntities(IfcEntityList::ptr es);
+
+	void removeEntity(IfcUtil::IfcBaseClass* entity);
+
+	const IfcSpfHeader& header() const { return _header; }
+	IfcSpfHeader& header() { return _header; }
+
+	std::string createTimestamp() const;
+
+	bool create_latebound_entities() const { return _create_latebound_entities; }
+
+	std::pair<IfcSchema::IfcNamedUnit*, double> getUnit(IfcSchema::IfcUnitEnum::IfcUnitEnum);
+};
+
 }
 
-#endif
+#endif

src/ifcparse/IfcGuidHelper.cpp

@@ -0,0 +1,107 @@
+/********************************************************************************
+ *                                                                              *
+ * This file is part of IfcOpenShell.                                           *
+ *                                                                              *
+ * IfcOpenShell is free software: you can redistribute it and/or modify         *
+ * it under the terms of the Lesser GNU General Public License as published by  *
+ * the Free Software Foundation, either version 3.0 of the License, or          *
+ * (at your option) any later version.                                          *
+ *                                                                              *
+ * IfcOpenShell is distributed in the hope that it will be useful,              *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of               *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                 *
+ * Lesser GNU General Public License for more details.                          *
+ *                                                                              *
+ * You should have received a copy of the Lesser GNU General Public License     *
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.         *
+ *                                                                              *
+ ********************************************************************************/
+
+/********************************************************************************
+ *                                                                              *
+ * Please consider this a placeholder for an actual GlobalId generation         *
+ * algorithm. A real implementation could for example be based on Boost::uuid   *
+ *                                                                              *
+ ********************************************************************************/
+
+#include <time.h>
+#include <stdlib.h>
+#include <algorithm>
+
+#include <boost/uuid/uuid.hpp>
+#include <boost/uuid/uuid_generators.hpp>
+#include <boost/uuid/uuid_io.hpp>
+
+#include "../ifcparse/IfcWrite.h"
+#include "../ifcparse/IfcException.h"
+
+static const char* chars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz_$";
+
+// Converts an unsigned integer into a base64 string of length l
+std::string base64(unsigned v, int l) {
+    std::string r;
+    r.reserve(l);
+    while ( v ) {
+        r.push_back(chars[v%64]);
+        v /= 64;
+    }
+    while ( r.size() != l ) r.push_back('0');
+    std::reverse(r.begin(),r.end());
+    return r;
+}
+
+// Converts a base64 string into an unsigned integer
+unsigned from_base64(const std::string& s) {
+    std::string::size_type zeros = s.find_first_not_of('0');
+    unsigned r = 0;
+    if ( zeros != std::string::npos )
+        for ( std::string::const_iterator i = s.begin()+zeros; i != s.end(); ++ i ) {
+            r *= 64;
+            const char* c = strchr(chars,*i);
+            if ( !c ) throw IfcParse::IfcException("Failed to decode GlobalId");
+            r += (c-chars);
+        }
+    return r;
+}
+
+// Compresses the UUID byte array into a base64 representation
+std::string compress(unsigned char* v) {
+    std::string r;
+    r.reserve(22);
+    r += base64(v[0],2);
+    for ( unsigned i = 1; i < 16; i += 3 ) {
+        r += base64((v[i]<<16) + (v[i+1]<<8) + v[i+2],4);
+    }
+    return r;
+}
+
+// Expands the base64 representation into a UUID byte array
+void expand(const std::string& s, std::vector<unsigned char>& v) {
+    v.push_back(from_base64(s.substr(0,2)));
+    for( unsigned i = 0; i < 5; ++i ) {
+        unsigned d = from_base64(s.substr(2+4*i,4));
+        for ( unsigned j = 0; j < 3; ++ j ) {
+            v.push_back((d>>(8*(2-j))) % 256);
+        }
+    }
+}
+
+// A random number generator for the UUID
+static boost::uuids::basic_random_generator<boost::mt19937> gen;
+
+IfcWrite::IfcGuidHelper::IfcGuidHelper() {
+    boost::uuids::uuid u = gen();
+    std::vector<unsigned char> v(u.size());
+    std::copy(u.begin(), u.end(), v.begin());
+    data = compress(&v[0]);
+
+    std::vector<unsigned char> v2;
+    expand(data,v2);
+    boost::uuids::uuid u2;
+    std::copy(v2.begin(), v2.end(), u2.begin());
+}
+IfcWrite::IfcGuidHelper::operator std::string() const {
+	return data;
+}
+
+bool IfcWrite::IfcGuidHelper::seeded = false;

src/ifcparse/IfcHierarchyHelper.cpp

@@ -0,0 +1,533 @@
+/********************************************************************************
+ *                                                                              *
+ * This file is part of IfcOpenShell.                                           *
+ *                                                                              *
+ * IfcOpenShell is free software: you can redistribute it and/or modify         *
+ * it under the terms of the Lesser GNU General Public License as published by  *
+ * the Free Software Foundation, either version 3.0 of the License, or          *
+ * (at your option) any later version.                                          *
+ *                                                                              *
+ * IfcOpenShell is distributed in the hope that it will be useful,              *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of               *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                 *
+ * Lesser GNU General Public License for more details.                          *
+ *                                                                              *
+ * You should have received a copy of the Lesser GNU General Public License     *
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.         *
+ *                                                                              *
+ ********************************************************************************/
+
+/********************************************************************************
+ *                                                                              *
+ * This class is a subclass of the regular IfcFile class that implements        *
+ * several convenience functions for creating geometrical representations and   *
+ * spatial containers.                                                          *
+ *                                                                              *
+ ********************************************************************************/
+
+#include <time.h>
+
+#include "../ifcparse/IfcHierarchyHelper.h"
+	
+IfcSchema::IfcAxis2Placement3D* IfcHierarchyHelper::addPlacement3d(
+	double ox, double oy, double oz,
+	double zx, double zy, double zz,
+	double xx, double xy, double xz) 
+{
+		IfcSchema::IfcDirection* x = addTriplet<IfcSchema::IfcDirection>(xx, xy, xz);
+		IfcSchema::IfcDirection* z = addTriplet<IfcSchema::IfcDirection>(zx, zy, zz);
+		IfcSchema::IfcCartesianPoint* o = addTriplet<IfcSchema::IfcCartesianPoint>(ox, oy, oz);
+		IfcSchema::IfcAxis2Placement3D* p3d = new IfcSchema::IfcAxis2Placement3D(o, z, x);
+		addEntity(p3d);
+		return p3d;
+}
+
+IfcSchema::IfcAxis2Placement2D* IfcHierarchyHelper::addPlacement2d(
+	double ox, double oy,
+	double xx, double xy) 
+{
+		IfcSchema::IfcDirection* x = addDoublet<IfcSchema::IfcDirection>(xx, xy);
+		IfcSchema::IfcCartesianPoint* o = addDoublet<IfcSchema::IfcCartesianPoint>(ox, oy);
+		IfcSchema::IfcAxis2Placement2D* p2d = new IfcSchema::IfcAxis2Placement2D(o, x);
+		addEntity(p2d);
+		return p2d;
+}
+
+IfcSchema::IfcLocalPlacement* IfcHierarchyHelper::addLocalPlacement(IfcSchema::IfcObjectPlacement* parent,
+	double ox, double oy, double oz,
+	double zx, double zy, double zz,
+	double xx, double xy, double xz) 
+{
+		IfcSchema::IfcLocalPlacement* lp = new IfcSchema::IfcLocalPlacement(parent, 
+			addPlacement3d(ox, oy, oz, zx, zy, zz, xx, xy, xz));
+
+		addEntity(lp);
+		return lp;
+}
+
+IfcSchema::IfcOwnerHistory* IfcHierarchyHelper::addOwnerHistory() {
+	IfcSchema::IfcPerson* person = new IfcSchema::IfcPerson(boost::none, boost::none, std::string(""), 
+		boost::none, boost::none, boost::none, boost::none, boost::none);
+
+	IfcSchema::IfcOrganization* organization = new IfcSchema::IfcOrganization(boost::none, 
+		"IfcOpenShell", boost::none, boost::none, boost::none);
+
+	IfcSchema::IfcPersonAndOrganization* person_and_org = new IfcSchema::IfcPersonAndOrganization(person, organization, boost::none);
+	IfcSchema::IfcApplication* application = new IfcSchema::IfcApplication(organization, 
+		IFCOPENSHELL_VERSION, "IfcOpenShell", "IfcOpenShell");
+
+	int timestamp = (int) time(0);
+	IfcSchema::IfcOwnerHistory* owner_hist = new IfcSchema::IfcOwnerHistory(person_and_org, application, 
+		boost::none, IfcSchema::IfcChangeActionEnum::IfcChangeAction_ADDED, timestamp, person_and_org, application, timestamp);
+
+	addEntity(person);
+	addEntity(organization);
+	addEntity(person_and_org);
+	addEntity(application);
+	addEntity(owner_hist);
+
+	return owner_hist;
+}
+	
+IfcSchema::IfcProject* IfcHierarchyHelper::addProject(IfcSchema::IfcOwnerHistory* owner_hist) {
+	IfcSchema::IfcRepresentationContext::list::ptr rep_contexts (new IfcSchema::IfcRepresentationContext::list);
+
+	IfcEntityList::ptr units (new IfcEntityList);
+	IfcSchema::IfcDimensionalExponents* dimexp = new IfcSchema::IfcDimensionalExponents(0, 0, 0, 0, 0, 0, 0);
+	IfcSchema::IfcSIUnit* unit1 = new IfcSchema::IfcSIUnit(IfcSchema::IfcUnitEnum::IfcUnit_LENGTHUNIT, 
+		IfcSchema::IfcSIPrefix::IfcSIPrefix_MILLI, IfcSchema::IfcSIUnitName::IfcSIUnitName_METRE);
+	IfcSchema::IfcSIUnit* unit2a = new IfcSchema::IfcSIUnit(IfcSchema::IfcUnitEnum::IfcUnit_PLANEANGLEUNIT, 
+		boost::none, IfcSchema::IfcSIUnitName::IfcSIUnitName_RADIAN);
+	IfcSchema::IfcMeasureWithUnit* unit2b = new IfcSchema::IfcMeasureWithUnit(
+		new IfcSchema::IfcPlaneAngleMeasure(0.017453293), unit2a);
+	IfcSchema::IfcConversionBasedUnit* unit2 = new IfcSchema::IfcConversionBasedUnit(dimexp, 
+		IfcSchema::IfcUnitEnum::IfcUnit_PLANEANGLEUNIT, "Degrees", unit2b);
+
+	units->push(unit1);
+	units->push(unit2);
+
+	IfcSchema::IfcUnitAssignment* unit_assignment = new IfcSchema::IfcUnitAssignment(units);
+
+	IfcSchema::IfcProject* project = new IfcSchema::IfcProject(IfcWrite::IfcGuidHelper(), owner_hist, boost::none, boost::none, 
+		boost::none, boost::none, boost::none, rep_contexts, unit_assignment);
+
+	addEntity(dimexp);
+	addEntity(unit1);
+	addEntity(unit2a);
+	addEntity(unit2b);
+	addEntity(unit2);
+	addEntity(unit_assignment);
+	addEntity(project);
+
+	return project;
+}
+
+void IfcHierarchyHelper::relatePlacements(IfcSchema::IfcProduct* parent, IfcSchema::IfcProduct* product) {
+	IfcSchema::IfcObjectPlacement* place = product->ObjectPlacement() ? (*product->ObjectPlacement()) : 0;
+	if (place && place->is(IfcSchema::Type::IfcLocalPlacement)) {
+		IfcSchema::IfcLocalPlacement* local_place = (IfcSchema::IfcLocalPlacement*) place;
+		if (parent->ObjectPlacement()) {
+			local_place->PlacementRelTo(*parent->ObjectPlacement());
+		}
+	}
+}
+	
+IfcSchema::IfcSite* IfcHierarchyHelper::addSite(IfcSchema::IfcProject* proj, IfcSchema::IfcOwnerHistory* owner_hist) {
+	if (! owner_hist) {
+		owner_hist = getSingle<IfcSchema::IfcOwnerHistory>();
+	}
+	if (! owner_hist) {
+		owner_hist = addOwnerHistory();
+	}
+	if (! proj) {
+		proj = getSingle<IfcSchema::IfcProject>();
+	}
+	if (! proj) {
+		proj = addProject(owner_hist);
+	}
+
+	IfcSchema::IfcSite* site = new IfcSchema::IfcSite(IfcWrite::IfcGuidHelper(), owner_hist, boost::none, 
+		boost::none, boost::none, addLocalPlacement(), boost::none, boost::none, 
+		IfcSchema::IfcElementCompositionEnum::IfcElementComposition_ELEMENT, 
+		boost::none, boost::none, boost::none, boost::none, boost::none);
+
+	addEntity(site);
+	addRelatedObject<IfcSchema::IfcRelAggregates>(proj, site);
+	return site;
+}
+	
+IfcSchema::IfcBuilding* IfcHierarchyHelper::addBuilding(IfcSchema::IfcSite* site, IfcSchema::IfcOwnerHistory* owner_hist) {
+	if (! owner_hist) {
+		owner_hist = getSingle<IfcSchema::IfcOwnerHistory>();
+	}
+	if (! owner_hist) {
+		owner_hist = addOwnerHistory();
+	}
+	if (! site) {
+		site = getSingle<IfcSchema::IfcSite>();
+	}
+	if (! site) {
+		site = addSite(0, owner_hist);
+	}
+	IfcSchema::IfcBuilding* building = new IfcSchema::IfcBuilding(IfcWrite::IfcGuidHelper(), owner_hist, boost::none, boost::none, boost::none, 
+		addLocalPlacement(), boost::none, boost::none, IfcSchema::IfcElementCompositionEnum::IfcElementComposition_ELEMENT, 
+		boost::none, boost::none, boost::none);
+
+	addEntity(building);
+	addRelatedObject<IfcSchema::IfcRelAggregates>(site, building);
+	relatePlacements(site, building);
+
+	return building;
+}
+
+IfcSchema::IfcBuildingStorey* IfcHierarchyHelper::addBuildingStorey(IfcSchema::IfcBuilding* building, 
+	IfcSchema::IfcOwnerHistory* owner_hist) 
+{
+	if (! owner_hist) {
+		owner_hist = getSingle<IfcSchema::IfcOwnerHistory>();
+	}
+	if (! owner_hist) {
+		owner_hist = addOwnerHistory();
+	}
+	if (! building) {
+		building = getSingle<IfcSchema::IfcBuilding>();
+	}
+	if (! building) {
+		building = addBuilding(0, owner_hist);
+	}
+	IfcSchema::IfcBuildingStorey* storey = new IfcSchema::IfcBuildingStorey(IfcWrite::IfcGuidHelper(), 
+		owner_hist, boost::none, boost::none, boost::none, addLocalPlacement(), boost::none, boost::none, 
+		IfcSchema::IfcElementCompositionEnum::IfcElementComposition_ELEMENT, boost::none);
+
+	addEntity(storey);
+	addRelatedObject<IfcSchema::IfcRelAggregates>(building, storey);
+	relatePlacements(building, storey);
+
+	return storey;
+}
+
+IfcSchema::IfcBuildingStorey* IfcHierarchyHelper::addBuildingProduct(IfcSchema::IfcProduct* product, 
+	IfcSchema::IfcBuildingStorey* storey, IfcSchema::IfcOwnerHistory* owner_hist) 
+{
+	if (! owner_hist) {
+		owner_hist = getSingle<IfcSchema::IfcOwnerHistory>();
+	}
+	if (! owner_hist) {
+		owner_hist = addOwnerHistory();
+	}
+	if (! storey) {
+		storey = getSingle<IfcSchema::IfcBuildingStorey>();
+	}
+	if (! storey) {
+		storey = addBuildingStorey(0, owner_hist);
+	}
+	addEntity(product);
+	// CV-2x3-158: Don't add decompositions directly to a building storey
+	bool is_decomposition = false;
+#ifdef USE_IFC4
+	IfcSchema::IfcRelAggregates::list::ptr decomposes = product->Decomposes();
+	for (IfcSchema::IfcRelAggregates::list::it it = decomposes->begin(); it != decomposes->end(); ++it) {
+#else
+	IfcSchema::IfcRelDecomposes::list::ptr decomposes = product->Decomposes();
+	for (IfcSchema::IfcRelDecomposes::list::it it = decomposes->begin(); it != decomposes->end(); ++it) {
+#endif
+		if ((*it)->RelatingObject() != product) {
+			is_decomposition = true;
+			break;
+		}
+	}
+	if (!is_decomposition) {
+		addRelatedObject<IfcSchema::IfcRelContainedInSpatialStructure>(storey, product);
+		relatePlacements(storey, product);
+	}
+	return storey;
+}
+
+void IfcHierarchyHelper::addExtrudedPolyline(IfcSchema::IfcShapeRepresentation* rep, const std::vector<std::pair<double, double> >& points, double h, 
+	IfcSchema::IfcAxis2Placement2D* place, IfcSchema::IfcAxis2Placement3D* place2, 
+	IfcSchema::IfcDirection* dir, IfcSchema::IfcRepresentationContext* context) 
+{
+	IfcSchema::IfcCartesianPoint::list::ptr cartesian_points (new IfcSchema::IfcCartesianPoint::list);
+	for (std::vector<std::pair<double, double> >::const_iterator i = points.begin(); i != points.end(); ++i) {
+		cartesian_points->push(addDoublet<IfcSchema::IfcCartesianPoint>(i->first, i->second));
+	}
+	if (cartesian_points->size()) cartesian_points->push(*cartesian_points->begin());
+	IfcSchema::IfcPolyline* line = new IfcSchema::IfcPolyline(cartesian_points);
+	IfcSchema::IfcArbitraryClosedProfileDef* profile = new IfcSchema::IfcArbitraryClosedProfileDef(
+		IfcSchema::IfcProfileTypeEnum::IfcProfileType_AREA, boost::none, line);
+
+	IfcSchema::IfcExtrudedAreaSolid* solid = new IfcSchema::IfcExtrudedAreaSolid(
+		profile, place2 ? place2 : addPlacement3d(), dir ? dir : addTriplet<IfcSchema::IfcDirection>(0, 0, 1), h);
+
+	IfcSchema::IfcRepresentationItem::list::ptr items = rep->Items();
+	items->push(solid);
+	rep->Items(items);
+
+	addEntity(line);
+	addEntity(profile);
+	addEntity(solid);
+}
+
+IfcSchema::IfcProductDefinitionShape* IfcHierarchyHelper::addExtrudedPolyline(const std::vector<std::pair<double, double> >& points, double h, 
+	IfcSchema::IfcAxis2Placement2D* place, IfcSchema::IfcAxis2Placement3D* place2, IfcSchema::IfcDirection* dir, 
+	IfcSchema::IfcRepresentationContext* context) 
+{
+	IfcSchema::IfcRepresentation::list::ptr reps (new IfcSchema::IfcRepresentation::list);
+	IfcSchema::IfcRepresentationItem::list::ptr items (new IfcSchema::IfcRepresentationItem::list);
+	IfcSchema::IfcShapeRepresentation* rep = new IfcSchema::IfcShapeRepresentation(context 
+		? context 
+		: getRepresentationContext("Model"), std::string("Body"), std::string("SweptSolid"), items);
+	reps->push(rep);
+	IfcSchema::IfcProductDefinitionShape* shape = new IfcSchema::IfcProductDefinitionShape(0, 0, reps);		
+	addEntity(rep);
+	addEntity(shape);
+	addExtrudedPolyline(rep, points, h, place, place2, dir, context);
+
+	return shape;
+}
+
+void IfcHierarchyHelper::addBox(IfcSchema::IfcShapeRepresentation* rep, double w, double d, double h, 
+	IfcSchema::IfcAxis2Placement2D* place, IfcSchema::IfcAxis2Placement3D* place2, 
+	IfcSchema::IfcDirection* dir, IfcSchema::IfcRepresentationContext* context) 
+{
+	if (false) {
+		IfcSchema::IfcRectangleProfileDef* profile = new IfcSchema::IfcRectangleProfileDef(
+			IfcSchema::IfcProfileTypeEnum::IfcProfileType_AREA, boost::none, place ? place : addPlacement2d(), w, d);
+		IfcSchema::IfcExtrudedAreaSolid* solid = new IfcSchema::IfcExtrudedAreaSolid(profile, 
+			place2 ? place2 : addPlacement3d(), dir ? dir : addTriplet<IfcSchema::IfcDirection>(0, 0, 1), h);
+
+		addEntity(profile);
+		addEntity(solid);
+		IfcSchema::IfcRepresentationItem::list::ptr items = rep->Items();
+		items->push(solid);
+		rep->Items(items);
+	} else {
+		std::vector<std::pair<double, double> > points;
+		points.push_back(std::pair<double, double>(-w/2, -d/2));
+		points.push_back(std::pair<double, double>(w/2, -d/2));
+		points.push_back(std::pair<double, double>(w/2, d/2));
+		points.push_back(std::pair<double, double>(-w/2, d/2));
+		// The call to addExtrudedPolyline() closes the polyline
+		addExtrudedPolyline(rep, points, h, place, place2, dir, context);
+	}
+}
+
+void IfcHierarchyHelper::addAxis(IfcSchema::IfcShapeRepresentation* rep, double l, IfcSchema::IfcRepresentationContext* context) {
+	IfcSchema::IfcCartesianPoint* p1 = addDoublet<IfcSchema::IfcCartesianPoint>(-l / 2., 0.);
+	IfcSchema::IfcCartesianPoint* p2 = addDoublet<IfcSchema::IfcCartesianPoint>(+l / 2., 0.);
+	IfcSchema::IfcCartesianPoint::list::ptr pts(new IfcSchema::IfcCartesianPoint::list);
+	pts->push(p1); pts->push(p2);
+	IfcSchema::IfcPolyline* poly = new IfcSchema::IfcPolyline(pts);
+	addEntity(poly);
+	
+	IfcSchema::IfcRepresentationItem::list::ptr items = rep->Items();
+	items->push(poly);
+	rep->Items(items);
+}
+
+IfcSchema::IfcProductDefinitionShape* IfcHierarchyHelper::addBox(double w, double d, double h, IfcSchema::IfcAxis2Placement2D* place, 
+	IfcSchema::IfcAxis2Placement3D* place2, IfcSchema::IfcDirection* dir, IfcSchema::IfcRepresentationContext* context) 
+{
+	IfcSchema::IfcRepresentation::list::ptr reps (new IfcSchema::IfcRepresentation::list);
+	IfcSchema::IfcRepresentationItem::list::ptr items (new IfcSchema::IfcRepresentationItem::list);		
+	IfcSchema::IfcShapeRepresentation* rep = new IfcSchema::IfcShapeRepresentation(
+		context ? context : getRepresentationContext("Model"), std::string("Body"), std::string("SweptSolid"), items);
+	reps->push(rep);
+	IfcSchema::IfcProductDefinitionShape* shape = new IfcSchema::IfcProductDefinitionShape(boost::none, boost::none, reps);		
+	addEntity(rep);
+	addEntity(shape);
+	addBox(rep, w, d, h, place, place2, dir, context);
+	return shape;
+}
+
+IfcSchema::IfcProductDefinitionShape* IfcHierarchyHelper::addAxisBox(double w, double d, double h, IfcSchema::IfcRepresentationContext* context) 
+{
+	IfcSchema::IfcRepresentation::list::ptr reps(new IfcSchema::IfcRepresentation::list);
+	IfcSchema::IfcRepresentationItem::list::ptr body_items(new IfcSchema::IfcRepresentationItem::list);
+	IfcSchema::IfcRepresentationItem::list::ptr axis_items(new IfcSchema::IfcRepresentationItem::list);
+	IfcSchema::IfcShapeRepresentation* body_rep = new IfcSchema::IfcShapeRepresentation(
+		context ? context : getRepresentationContext("Model"), std::string("Body"), std::string("SweptSolid"), body_items);
+
+	IfcSchema::IfcShapeRepresentation* axis_rep = new IfcSchema::IfcShapeRepresentation(
+		context ? context : getRepresentationContext("Plan"), std::string("Axis"), std::string("Curve2D"), axis_items);
+
+	reps->push(axis_rep);
+	reps->push(body_rep);
+
+	IfcSchema::IfcProductDefinitionShape* shape = new IfcSchema::IfcProductDefinitionShape(boost::none, boost::none, reps);		
+	addEntity(shape);
+	addEntity(body_rep);
+	addBox(body_rep, w, d, h, 0, 0, 0, context);
+	addEntity(axis_rep);
+	addAxis(axis_rep, w);
+	
+	return shape;
+}
+
+void IfcHierarchyHelper::clipRepresentation(IfcSchema::IfcProductRepresentation* shape, 
+	IfcSchema::IfcAxis2Placement3D* place, bool agree) 
+{
+	IfcSchema::IfcRepresentation::list::ptr reps = shape->Representations();
+	for (IfcSchema::IfcRepresentation::list::it j = reps->begin(); j != reps->end(); ++j) {
+		clipRepresentation(*j, place, agree);
+	}
+}
+
+void IfcHierarchyHelper::clipRepresentation(IfcSchema::IfcRepresentation* rep, 
+	IfcSchema::IfcAxis2Placement3D* place, bool agree) 
+{
+	if (!rep->RepresentationIdentifier() || *rep->RepresentationIdentifier() != "Body") return;
+	IfcSchema::IfcPlane* plane = new IfcSchema::IfcPlane(place);
+	IfcSchema::IfcHalfSpaceSolid* half_space = new IfcSchema::IfcHalfSpaceSolid(plane, agree);
+	addEntity(plane);
+	addEntity(half_space);
+	rep->RepresentationType(std::string("Clipping"));		
+	IfcSchema::IfcRepresentationItem::list::ptr items = rep->Items();
+	IfcSchema::IfcRepresentationItem::list::ptr new_items (new IfcSchema::IfcRepresentationItem::list);
+	for (IfcSchema::IfcRepresentationItem::list::it i = items->begin(); i != items->end(); ++i) {
+		IfcSchema::IfcRepresentationItem* item = *i;
+		IfcSchema::IfcBooleanClippingResult* clip = new IfcSchema::IfcBooleanClippingResult(
+			IfcSchema::IfcBooleanOperator::IfcBooleanOperator_DIFFERENCE, item, half_space);
+		addEntity(clip);
+		new_items->push(clip);
+	}
+	rep->Items(new_items);
+}
+
+IfcSchema::IfcPresentationStyleAssignment* IfcHierarchyHelper::addStyleAssignment(double r, double g, double b, double a) {
+	IfcSchema::IfcColourRgb* colour = new IfcSchema::IfcColourRgb(boost::none, r, g, b);
+	IfcSchema::IfcSurfaceStyleRendering* rendering = a == 1.0
+		? new IfcSchema::IfcSurfaceStyleRendering(colour, boost::none, boost::none, boost::none, boost::none, boost::none, 
+			boost::none, boost::none, IfcSchema::IfcReflectanceMethodEnum::IfcReflectanceMethod_FLAT)
+		: new IfcSchema::IfcSurfaceStyleRendering(colour, 1.0-a, boost::none, boost::none, boost::none, boost::none, 
+			boost::none, boost::none, IfcSchema::IfcReflectanceMethodEnum::IfcReflectanceMethod_FLAT);
+
+	IfcEntityList::ptr styles(new IfcEntityList());
+	styles->push(rendering);
+	IfcSchema::IfcSurfaceStyle* surface_style = new IfcSchema::IfcSurfaceStyle(
+		boost::none, IfcSchema::IfcSurfaceSide::IfcSurfaceSide_BOTH, styles);
+	IfcEntityList::ptr surface_styles(new IfcEntityList());
+	surface_styles->push(surface_style);
+	IfcSchema::IfcPresentationStyleAssignment* style_assignment = 
+		new IfcSchema::IfcPresentationStyleAssignment(surface_styles);
+	addEntity(colour);
+	addEntity(rendering);
+	addEntity(surface_style);
+	addEntity(style_assignment);
+	return style_assignment;
+}
+
+IfcSchema::IfcPresentationStyleAssignment* IfcHierarchyHelper::setSurfaceColour(
+	IfcSchema::IfcProductRepresentation* shape, double r, double g, double b, double a) 
+{
+	IfcSchema::IfcPresentationStyleAssignment* style_assignment = addStyleAssignment(r, g, b, a);
+	setSurfaceColour(shape, style_assignment);
+	return style_assignment;
+}
+
+IfcSchema::IfcPresentationStyleAssignment* IfcHierarchyHelper::setSurfaceColour(
+	IfcSchema::IfcRepresentation* shape, double r, double g, double b, double a) 
+{
+	IfcSchema::IfcPresentationStyleAssignment* style_assignment = addStyleAssignment(r, g, b, a);
+	setSurfaceColour(shape, style_assignment);
+	return style_assignment;
+}
+
+void IfcHierarchyHelper::setSurfaceColour(IfcSchema::IfcProductRepresentation* shape, 
+	IfcSchema::IfcPresentationStyleAssignment* style_assignment) 
+{
+	IfcSchema::IfcRepresentation::list::ptr reps = shape->Representations();
+	for (IfcSchema::IfcRepresentation::list::it j = reps->begin(); j != reps->end(); ++j) {
+		setSurfaceColour(*j, style_assignment);
+	}
+}
+
+void IfcHierarchyHelper::setSurfaceColour(IfcSchema::IfcRepresentation* rep, 
+	IfcSchema::IfcPresentationStyleAssignment* style_assignment) 
+{
+#ifdef USE_IFC4 
+	IfcEntityList::ptr style_assignments (new IfcEntityList);
+#else
+	IfcSchema::IfcPresentationStyleAssignment::list::ptr style_assignments (new IfcSchema::IfcPresentationStyleAssignment::list);
+#endif
+	style_assignments->push(style_assignment);
+	IfcSchema::IfcRepresentationItem::list::ptr items = rep->Items();
+	for (IfcSchema::IfcRepresentationItem::list::it i = items->begin(); i != items->end(); ++i) {
+		IfcSchema::IfcRepresentationItem* item = *i;
+		IfcSchema::IfcStyledItem* styled_item = new IfcSchema::IfcStyledItem(item, style_assignments, boost::none);
+		addEntity(styled_item);
+	}
+}
+
+IfcSchema::IfcProductDefinitionShape* IfcHierarchyHelper::addMappedItem(
+	IfcSchema::IfcShapeRepresentation* rep, 
+	IfcSchema::IfcCartesianTransformationOperator3D* transform,
+	IfcSchema::IfcProductDefinitionShape* def)
+{
+	IfcSchema::IfcRepresentationMap::list::ptr maps = rep->RepresentationMap();
+	IfcSchema::IfcRepresentationMap* map;
+	if (maps->size() == 1) {
+		map = *maps->begin();
+	} else {
+		map = new IfcSchema::IfcRepresentationMap(addPlacement3d(), rep);
+		addEntity(map);
+	}
+
+	IfcSchema::IfcRepresentation::list::ptr representations(new IfcSchema::IfcRepresentation::list);
+	if (def) representations = def->Representations();
+
+	if (!transform) {
+		transform = new IfcSchema::IfcCartesianTransformationOperator3D(boost::none, boost::none, addTriplet<IfcSchema::IfcCartesianPoint>(0,0,0), boost::none, boost::none);
+		addEntity(transform);
+	}
+	IfcSchema::IfcMappedItem* item = new IfcSchema::IfcMappedItem(map, transform);
+	IfcSchema::IfcRepresentationItem::list::ptr items(new IfcSchema::IfcRepresentationItem::list);
+	items->push(item);
+	IfcSchema::IfcRepresentation* new_rep = new IfcSchema::IfcShapeRepresentation(rep->ContextOfItems(), boost::none, std::string("MappedRepresentation"), items);
+	if (rep->RepresentationIdentifier()) {
+		new_rep->RepresentationIdentifier(*rep->RepresentationIdentifier());
+	}	
+	addEntity(item);
+	addEntity(new_rep);
+	representations->push(new_rep);
+	if (!def) {
+		def = new IfcSchema::IfcProductDefinitionShape(boost::none, boost::none, representations);
+		addEntity(def);
+	} else {
+		def->Representations(representations);
+	}
+	return def;
+}
+
+IfcSchema::IfcProductDefinitionShape* IfcHierarchyHelper::addMappedItem(
+	IfcSchema::IfcShapeRepresentation::list::ptr reps, 
+	IfcSchema::IfcCartesianTransformationOperator3D* transform)
+{
+	IfcSchema::IfcProductDefinitionShape* def = 0;
+	for (IfcSchema::IfcShapeRepresentation::list::it it = reps->begin(); it != reps->end(); ++it) {
+		def = addMappedItem(*it, transform, def);
+	}
+	return def;
+}
+
+IfcSchema::IfcShapeRepresentation* IfcHierarchyHelper::addEmptyRepresentation(const std::string& repid, const std::string& reptype) {
+	IfcSchema::IfcRepresentationItem::list::ptr items(new IfcSchema::IfcRepresentationItem::list);
+	IfcSchema::IfcShapeRepresentation* shape_rep = new IfcSchema::IfcShapeRepresentation(getRepresentationContext(reptype == "Curve2D" ? "Plan" : "Model"), repid, reptype, items);
+	addEntity(shape_rep);
+	return shape_rep;
+}
+
+IfcSchema::IfcGeometricRepresentationContext* IfcHierarchyHelper::getRepresentationContext(const std::string& s) {
+	std::map<std::string, IfcSchema::IfcGeometricRepresentationContext*>::const_iterator it = contexts.find(s);
+	if (it != contexts.end()) return it->second;
+	else {
+		IfcSchema::IfcProject* project = getSingle<IfcSchema::IfcProject>();
+		IfcSchema::IfcRepresentationContext::list::ptr project_contexts = project->RepresentationContexts();
+		IfcSchema::IfcGeometricRepresentationContext* context = new IfcSchema::IfcGeometricRepresentationContext(
+			boost::none, s, 3, 1e-5, addPlacement3d(), addDoublet<IfcSchema::IfcDirection>(0, 1));
+		addEntity(context);
+		project_contexts->push(context);
+		project->RepresentationContexts(project_contexts);
+		return contexts[s] = context;
+	}
+}