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Clash: Increase robustness of processing triangulated elements - fully co-planar element #7467

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This commit is contained in:
Thomas Krijnen
2026-01-23 11:43:39 +01:00
parent 9c6a8bdb90
commit f0308962aa
1 changed files with 25 additions and 12 deletions
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src/ifcgeom/kernels/opencascade/IfcGeomTree.h
+25 -12
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@@ -1863,23 +1863,36 @@ namespace IfcGeom {
candidates.push_back({ std::abs(Z.Dot(ref)), ref });
}
if (candidates.empty()) {
{
gp_XYZ ref(0, 0, 1);
candidates.push_back({ std::abs(Z.Dot(ref)), ref });
gp_Ax3 ax3;
gp_Trsf trsf2;
for (size_t attempt = 0; attempt < 2; ++attempt) {
if (candidates.empty() || attempt == 1) {
{
gp_XYZ ref(0, 0, 1);
candidates.push_back({std::abs(Z.Dot(ref)), ref});
}
{
gp_XYZ ref(1, 0, 0);
candidates.push_back({std::abs(Z.Dot(ref)), ref});
}
}
auto X = std::min_element(candidates.begin(), candidates.end(), [](auto& p1, auto& p2) { return p1.first < p2.first; })->second;
{
gp_XYZ ref(1, 0, 0);
candidates.push_back({ std::abs(Z.Dot(ref)), ref });
try {
ax3 = gp_Ax3(gp::Origin(), Z, X);
trsf2.SetTransformation(gp::XOY(), ax3);
} catch (Standard_ConstructionError&) {
// Try again, likely we have all identical normals in candidates so
// we cannot find a suitable candidate and need the two default axes
continue;
}
}
}
auto X = std::min_element(candidates.begin(), candidates.end(), [](auto& p1, auto& p2) { return p1.first < p2.first; })->second;
gp_Trsf trsf2;
gp_Ax3 ax3(gp::Origin(), Z, X);
trsf2.SetTransformation(gp::XOY(), ax3);
Bnd_Box tmp;
for (auto& p : vs_transformed) {