0025003: Selection of a face fails if sensitive triangulation is computed with interi...

[occt.git] / src / Select3D / Select3D_SensitiveTriangulation.cxx

diff --git a/src/Select3D/Select3D_SensitiveTriangulation.cxx b/src/Select3D/Select3D_SensitiveTriangulation.cxx
index 700f138..70f6cd3 100644 (file)
--- a/src/Select3D/Select3D_SensitiveTriangulation.cxx
+++ b/src/Select3D/Select3D_SensitiveTriangulation.cxx
@@ -59,6 +59,9 @@ static Standard_Boolean S3D_STriangul_NearSegment (const gp_XY& p0, const gp_XY&
   gp_XY V01(p1);V01-=p0;
   gp_XY Vec(TheP);Vec -= p0;
 
+  if (V01.SquareModulus() < Precision::SquareConfusion())
+    return Standard_False;
+
   Standard_Real u = Vec*V01.Normalized();
   if(u<-aTol) return Standard_False;
   Standard_Real u1 = u-aTol;