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- Make distinction between single shape and list of shapes

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- Store shapes in std::vectors rather than TopoDS_Compounds
- Apply transformation only on triangulated meshes or when processing openings
- Store transformations in a gp_GTrsf to allow arbitrary transformations
- Support IfcCartesianTransformationOperator3DnonUniform
- TODO: Create proper class for ShapeList
- TODO: Carefully check for null pointers returned from IfcGeom::convert_shape()
This commit is contained in:
Thomas Krijnen
2011-10-23 17:11:06 +00:00
parent 8bcb9ffa3e
commit bd79df2be7
17 changed files with 360 additions and 174 deletions
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src/ifcgeom/IfcGeomFunctions.cpp
+74 -22
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@@ -29,9 +29,12 @@
#include <gp_Pnt2d.hxx>
#include <gp_Vec2d.hxx>
#include <gp_Dir2d.hxx>
#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 <gp_Mat.hxx>
#include <gp_Ax3.hxx>
#include <gp_Ax2d.hxx>
#include <gp_Pln.hxx>
@@ -75,37 +78,86 @@
#include <GProp_GProps.hxx>
#include <BRepGProp.hxx>
#include <BRepBuilderAPI_GTransform.hxx>
#include "../ifcgeom/IfcGeom.h"
bool IfcGeom::convert_openings(const Ifc2x3::IfcProduct::ptr entity,
const Ifc2x3::IfcRelVoidsElement::list& openings, TopoDS_Shape& result, const gp_Trsf& trsf2) {
bool IfcGeom::convert_openings(const Ifc2x3::IfcProduct::ptr entity, const Ifc2x3::IfcRelVoidsElement::list& openings,
const ShapeList& entity_shapes, const gp_Trsf& entity_trsf, ShapeList& cut_shapes) {
// Iterate over IfcOpeningElements
IfcGeom::ShapeList opening_shapes;
unsigned int last_size = 0;
for ( Ifc2x3::IfcRelVoidsElement::it it = openings->begin(); it != openings->end(); ++ it ) {
Ifc2x3::IfcRelVoidsElement::ptr v = *it;
Ifc2x3::IfcFeatureElementSubtraction::ptr fes = v->RelatedOpeningElement();
if ( fes->is(Ifc2x3::Type::IfcOpeningElement) ) {
gp_Trsf trsf;
IfcGeom::convert(fes->ObjectPlacement(),trsf);
trsf.PreMultiply(trsf2.Inverted());
// Convert the IfcRepresentation of the IfcOpeningElement
gp_Trsf opening_trsf;
IfcGeom::convert(fes->ObjectPlacement(),opening_trsf);
// Move the opening into the coordinate system of the IfcProduct
opening_trsf.PreMultiply(entity_trsf.Inverted());
Ifc2x3::IfcProductRepresentation::ptr prodrep = fes->Representation();
if ( prodrep->is(Ifc2x3::Type::IfcProductDefinitionShape) ) {
Ifc2x3::IfcProductDefinitionShape::ptr pds = reinterpret_pointer_cast<Ifc2x3::IfcProductRepresentation,Ifc2x3::IfcProductDefinitionShape>(prodrep);
Ifc2x3::IfcRepresentation::list reps = pds->Representations();
for ( Ifc2x3::IfcRepresentation::it it2 = reps->begin(); it2 != reps->end(); ++ it2 ) {
TopoDS_Shape s;
IfcGeom::convert_shape(*it2,s);
s.Move(trsf);
const float opening_volume = shape_volume(s);
if ( opening_volume <= ALMOST_ZERO )
Ifc::LogMessage("warning","Empty solid for:",fes->entity);
const float original_shape_volume = shape_volume(result);
result = BRepAlgoAPI_Cut(result,s);
const float volume_after_subtraction = shape_volume(result);
if ( ALMOST_THE_SAME(original_shape_volume,volume_after_subtraction) )
Ifc::LogMessage("warning","Warning subtraction yields unchanged volume:",entity->entity);
}
Ifc2x3::IfcRepresentation::list reps = prodrep->Representations();
for ( Ifc2x3::IfcRepresentation::it it2 = reps->begin(); it2 != reps->end(); ++ it2 ) {
IfcGeom::convert_shapes(*it2,opening_shapes);
}
const unsigned int current_size = (const unsigned int) opening_shapes.size();
for ( unsigned int i = last_size; i < current_size; ++ i ) {
opening_shapes[i].first->PreMultiply(opening_trsf);
}
last_size = current_size;
}
}
// Iterate over the shapes of the IfcProduct
for ( IfcGeom::ShapeList::const_iterator it3 = entity_shapes.begin(); it3 != entity_shapes.end(); ++ it3 ) {
const TopoDS_Shape& entity_shape_unlocated = *(it3->second);
const gp_GTrsf& entity_shape_gtrsf = *(it3->first);
TopoDS_Shape entity_shape;
if ( entity_shape_gtrsf.Form() == gp_Other ) {
Ifc::LogMessage("warning","Applying non uniform transformation to:",entity->entity);
entity_shape = BRepBuilderAPI_GTransform(entity_shape_unlocated,entity_shape_gtrsf,true).Shape();
} else {
entity_shape = entity_shape_unlocated.Moved(entity_shape_gtrsf.Trsf());
}
// Iterate over the shapes of the IfcOpeningElements
for ( IfcGeom::ShapeList::const_iterator it4 = opening_shapes.begin(); it4 != opening_shapes.end(); ++ it4 ) {
const TopoDS_Shape& opening_shape_unlocated = *(it4->second);
const gp_GTrsf& opening_shape_gtrsf = *(it4->first);
if ( opening_shape_gtrsf.Form() == gp_Other ) {
Ifc::LogMessage("warning","Applying non uniform transformation to opening of:",entity->entity);
}
const TopoDS_Shape& opening_shape = opening_shape_gtrsf.Form() == gp_Other
? BRepBuilderAPI_GTransform(opening_shape_unlocated,opening_shape_gtrsf,true).Shape()
: opening_shape_unlocated.Moved(opening_shape_gtrsf.Trsf());
const float opening_volume = shape_volume(opening_shape);
if ( opening_volume <= ALMOST_ZERO )
Ifc::LogMessage("warning","Empty opening for:",entity->entity);
const float original_shape_volume = shape_volume(entity_shape);
entity_shape = BRepAlgoAPI_Cut(entity_shape,opening_shape);
const float volume_after_subtraction = shape_volume(entity_shape);
if ( ALMOST_THE_SAME(original_shape_volume,volume_after_subtraction) )
Ifc::LogMessage("warning","Warning subtraction yields unchanged volume:",entity->entity);
}
cut_shapes.push_back(IfcGeom::LocationShape(new gp_GTrsf(),new TopoDS_Shape(entity_shape)));
}
// Delete references to opening transformations, but keep shapes in the cache
for ( IfcGeom::ShapeList::const_iterator it5 = opening_shapes.begin(); it5 != opening_shapes.end(); ++ it5 ) {
delete it5->first;
}
return true;
}
bool IfcGeom::convert_wire_to_face(const TopoDS_Wire& wire, TopoDS_Face& face) {