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Fix #163 Disallow narrow IfcPolygonalBoundedHalfSpace

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This commit is contained in:
Thomas Krijnen
2016-12-10 14:11:01 +01:00
parent da0b350378
commit c08aa3216d
3 changed files with 12 additions and 4 deletions
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src/ifcgeom/IfcGeomShapes.cpp
+9 -2
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@@ -433,8 +433,15 @@ bool IfcGeom::Kernel::convert(const IfcSchema::IfcPolygonalBoundedHalfSpace* l,
TColgp_SequenceOfPnt points;
if (wire_to_sequence_of_point(wire, points)) {
remove_duplicate_points_from_loop(points, wire.Closed() != 0); // Note: wire always closed, as per if statement above
remove_collinear_points_from_loop(points, wire.Closed() != 0);
// Boolean subtractions not very robust for narrow operands,
// increase minimal point spacing to eliminate such shapes.
const double t = getValue(GV_PRECISION) * 10.;
remove_duplicate_points_from_loop(points, wire.Closed() != 0, t); // Note: wire always closed, as per if statement above
remove_collinear_points_from_loop(points, wire.Closed() != 0, t);
if (points.Size() < 3) {
Logger::Message(Logger::LOG_ERROR, "Not enough points retained from:", l->PolygonalBoundary()->entity);
return false;
}
sequence_of_point_to_wire(points, wire, wire.Closed() != 0);
}