Glassvision/IfcOpenShell
1
0
Fork 0
mirror of https://github.com/IfcOpenShell/IfcOpenShell.git synced 2026-08-17 19:09:07 +00:00
Code Issues Packages Projects Releases Wiki Activity

Filter duplicate edge indices #3546

Browse Source
This commit is contained in:
Thomas Krijnen
2023-08-06 14:27:31 +08:00
parent c6438933ba
commit ee09f2404b
3 changed files with 18 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/ifcgeom/kernels/opencascade/OpenCascadeConversionResult.cpp
+15 -7
View File
@@ -47,6 +47,10 @@ void ifcopenshell::geometry::OpenCascadeShape::Triangulate(ifcopenshell::geometr
m(2, 0), m(2, 1), m(2, 2)
);
}
// When welding vertices, vertex coords will be shared among faces so we need to per-shape set
// to keep track of which edges were already emitted.
std::set<std::pair<int, int>> emitted_edges;
// Triangulate the shape
try {
@@ -70,7 +74,6 @@ void ifcopenshell::geometry::OpenCascadeShape::Triangulate(ifcopenshell::geometr
// 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;
std::vector<gp_XYZ> coords;
BRepGProp_Face prop(face);
@@ -142,14 +145,19 @@ void ifcopenshell::geometry::OpenCascadeShape::Triangulate(ifcopenshell::geometr
t->addFace(item_id, surface_style_id, dict[n1], dict[n2], dict[n3]);
t->addEdge(dict[n1], dict[n2], edgecount, edges_temp);
t->addEdge(dict[n2], dict[n3], edgecount, edges_temp);
t->addEdge(dict[n3], dict[n1], edgecount, edges_temp);
t->addEdge(dict[n1], dict[n2], edgecount);
t->addEdge(dict[n2], dict[n3], edgecount);
t->addEdge(dict[n3], dict[n1], edgecount);
}
for (std::vector<std::pair<int, int> >::const_iterator jt = edges_temp.begin(); jt != edges_temp.end(); ++jt) {
if (edgecount[*jt] == 1) {
for (auto& p : edgecount) {
// @todo should be != 2?
if (p.second == 1 && emitted_edges.find(p.first) == emitted_edges.end()) {
// non manifold edge, face boundary
t->registerEdge(jt->first, jt->second);
t->registerEdge(p.first.first, p.first.second);
if (settings.get<settings::WeldVertices>().get()) {
// only relevant while welding, because otherwise vertices are not shared among distinct faces
emitted_edges.insert(p.first);
}
}
}
}