X-Git-Url: http://git.salome-platform.org/gitweb/?a=blobdiff_plain;f=src%2FSMESHUtils%2FSMESH_Triangulate.cxx;h=f0ad3b512685ae23961640efef8489c15e4a25f3;hb=f016bdf914220827ec8f9a7048bc78fc3fb8c299;hp=6a60211c66a7edf6b812334a7e6455d9721c25c0;hpb=3f88168d832ee2e20ab5565f9c8d31cb9ed12615;p=modules%2Fsmesh.git

diff --git a/src/SMESHUtils/SMESH_Triangulate.cxx b/src/SMESHUtils/SMESH_Triangulate.cxx
index 6a60211c6..f0ad3b512 100644
--- a/src/SMESHUtils/SMESH_Triangulate.cxx
+++ b/src/SMESHUtils/SMESH_Triangulate.cxx
@@ -1,4 +1,4 @@
-// Copyright (C) 2007-2019  CEA/DEN, EDF R&D, OPEN CASCADE
+// Copyright (C) 2007-2021  CEA/DEN, EDF R&D, OPEN CASCADE
 //
 // Copyright (C) 2003-2007  OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
 // CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS
@@ -350,7 +350,7 @@ bool Triangulate::triangulate( std::vector< const SMDS_MeshNode*>& nodes,
   // connect nodes into a ring
   _pv.resize( nbNodes );
   for ( size_t i = 1; i < nbNodes; ++i )
-    _pv[i-1].SetNodeAndNext( nodes[i-1], _pv[i], i-1 );
+    _pv[i-1].SetNodeAndNext( nodes[i-1], _pv[i], /*index=*/i-1 );
   _pv[ nbNodes-1 ].SetNodeAndNext( nodes[ nbNodes-1 ], _pv[0], nbNodes-1 );
 
   // assure correctness of PolyVertex::_index as a node can encounter more than once
@@ -380,20 +380,26 @@ bool Triangulate::triangulate( std::vector< const SMDS_MeshNode*>& nodes,
   try {
     axes = gp_Ax2( p0, normal, v01 );
   }
-  catch ( Standard_Failure ) {
+  catch ( Standard_Failure& ) {
     return false;
   }
+  double factor = 1.0, modulus = normal.Modulus();
+  if ( modulus < 1e-2 )
+    factor = 1. / sqrt( modulus );
   for ( size_t i = 0; i < nbNodes; ++i )
   {
     gp_XYZ p = _pv[i]._nxyz - p0;
-    _pv[i]._xy.SetX( axes.XDirection().XYZ() * p );
-    _pv[i]._xy.SetY( axes.YDirection().XYZ() * p );
+    _pv[i]._xy.SetX( axes.XDirection().XYZ() * p * factor);
+    _pv[i]._xy.SetY( axes.YDirection().XYZ() * p * factor );
   }
 
   // compute minimal triangle area
   double sumArea = 0;
-  for ( size_t i = 0; i < nbNodes; ++i )
-    sumArea += _pv[i].TriaArea();
+  if ( factor == 1.0 )
+    sumArea = modulus;
+  else
+    for ( size_t i = 0; i < nbNodes; ++i )
+      sumArea += _pv[i].TriaArea();
   const double minArea = 1e-6 * sumArea / ( nbNodes - 2 );
 
   // in a loop, find triangles with positive area and having no vertices inside