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1. Also emit Plan and Axis shape representations and IfcTopologyRepresentations if requested. 2. Add serialization for curves. 3. In Python add option to specify representation for which to generate shape.

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This commit is contained in:
Thomas Krijnen
2015-04-22 09:15:48 +00:00
parent 53f625346f
commit c97cf661a2
25 changed files with 495 additions and 112 deletions
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src/ifcgeom/IfcGeomRepresentation.h
+45 -9
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@@ -29,6 +29,9 @@
#include <TopExp_Explorer.hxx>
#include <BRepAdaptor_Curve.hxx>
#include <GCPnts_QuasiUniformDeflection.hxx>
#include "../ifcgeom/IfcGeomIteratorSettings.h"
#include "../ifcgeom/IfcGeomMaterial.h"
#include "../ifcgeom/IfcRepresentationShapeItem.h"
@@ -150,10 +153,11 @@ namespace IfcGeom {
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() ) {
int num_faces = 0;
TopExp_Explorer exp;
for ( exp.Init(s,TopAbs_FACE); exp.More(); exp.Next(), ++num_faces ) {
TopoDS_Face face = TopoDS::Face(exp.Current());
TopLoc_Location loc;
Handle_Poly_Triangulation tri = BRep_Tool::Triangulation(face,loc);
@@ -191,9 +195,9 @@ namespace IfcGeom {
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());
_normals.push_back(static_cast<P>(normal.X()));
_normals.push_back(static_cast<P>(normal.Y()));
_normals.push_back(static_cast<P>(normal.Z()));
}
}
@@ -224,15 +228,47 @@ namespace IfcGeom {
_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);
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);
if (edgecount[*it] == 1) {
// non manifold edge, face boundary
_edges.push_back(it->first);
_edges.push_back(it->second);
}
}
}
}
if (num_faces == 0) {
// Edges are only emitted if there are no faces. A mixed representation of faces
// and loose edges is discouraged by the standard. An alternative would be to use
// TopExp::MapShapesAndAncestors() to find edges that do not belong to any face.
for (TopExp_Explorer exp(s, TopAbs_EDGE); exp.More(); exp.Next()) {
BRepAdaptor_Curve crv(TopoDS::Edge(exp.Current()));
GCPnts_QuasiUniformDeflection tessellater(crv, settings().deflection_tolerance());
int n = tessellater.NbPoints();
int start = _verts.size() / 3;
for (int i = 1; i <= n; ++i) {
gp_XYZ p = tessellater.Value(i).XYZ();
trsf.Transforms(p);
_material_ids.push_back(surface_style_id);
_verts.push_back(static_cast<P>(p.X()));
_verts.push_back(static_cast<P>(p.Y()));
_verts.push_back(static_cast<P>(p.Z()));
if (i > 1) {
_edges.push_back(start + i - 2);
_edges.push_back(start + i - 1);
}
}
}
}
}
}
virtual ~Triangulation() {}