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More robust processing of IfcPolyline and IfcPolyLoop

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This commit is contained in:
Thomas Krijnen
2014-07-28 20:03:53 +00:00
parent cf2e82e8f5
commit e77216d41c
4 changed files with 103 additions and 41 deletions
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src/ifcgeom/IfcGeomFunctions.cpp
+24 -1
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@@ -792,4 +792,27 @@ bool IfcGeom::flatten_shape_list(const IfcGeom::IfcRepresentationShapeItems& sha
return !result.IsNull();
}
void IfcGeom::remove_redundant_points_from_loop(TColgp_SequenceOfPnt& polygon, bool closed, double tol) {
if (tol <= 0.) tol = GetValue(GV_POINT_EQUALITY_TOLERANCE);
tol *= tol;
while (true) {
bool removed = false;
int n = polygon.Length() - (closed ? 0 : 1);
for (int i = 1; i <= n; ++i) {
// wrap around to the first point in case of a closed loop
int j = (i % polygon.Length()) + 1;
double dist = polygon.Value(i).SquareDistance(polygon.Value(j));
if (dist < tol) {
// do not remove the first or last point to
// maintain connectivity with other wires
if ((closed && j == 1) || (!closed && j == n)) polygon.Remove(i);
else polygon.Remove(j);
removed = true;
break;
}
}
if (!removed) break;
}
}