- Fixed a bug regarding IfcUnitAssignment

- Separate IFC parsing library and geometry libraries [#3395025] - Added example for IfcParse usage without geometry or Open CASCADE functionality - Cleanup of vcproj Open CASCADE dependencies - Added function to query parent class type in IfcExpressParser.py
2026-09-18 22:33:33 +00:00 · 2011-08-24 12:21:07 +00:00
parent 0b45066736
commit 2561f94acb
36 changed files with 986 additions and 197 deletions
@@ -0,0 +1,108 @@
+/********************************************************************************
+ *                                                                              *
+ * 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, bool world_coords) parses the IFC file in fn, returns true    *
+ *   on succes, world_coords = true will result in all IfcGeomObject.matrix     *
+ *   being an identity matrix and IfcMesh.verts containing global positions     *
+ *                                                                              *
+ * 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_Trsf.hxx>
+#include <gp_Pnt.hxx>
+#include <TopoDS.hxx>
+
+namespace IfcGeomObjects {
+
+	typedef std::vector<int>::const_iterator IntIt;
+	typedef std::vector<float>::const_iterator FltIt;
+	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;
+		VertKeyMap welds;
+		
+		IfcMesh(int i, TopoDS_Shape s);
+	private:
+		int addvert(gp_Pnt 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 IfcGeomObject {
+	public:
+		std::string name;
+		std::string type;
+		std::vector<float> matrix;
+		IfcMesh* mesh;
+		IfcGeomObject( const std::string& n, const std::string& t, gp_Trsf trsf, IfcMesh* m );
+	};
+
+	extern bool Init(const char* fn, bool world_coords = false, std::ostream* log1= 0, std::ostream* log2= 0);
+	extern bool Init(std::istream& f, int len, bool world_coords = false, std::ostream* log1= 0, std::ostream* log2= 0);
+	extern const IfcGeomObject* Get();
+	extern bool Next();	
+	extern int Progress();
+
+}
+
+#endif