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

A check on length is added to avoid manipulation with a vector of null length.

diff --git a/src/Select3D/Select3D_SensitiveTriangulation.cxx b/src/Select3D/Select3D_SensitiveTriangulation.cxx
index 700f1381432d9f717e127b1849e723f994ca3bef..70f6cd38e7d057456de0667d272dabcb784bd085 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;