From 9933995f6cd20e2169cbcf751f8647f9598c58f4 Mon Sep 17 00:00:00 2001
From: eap <eap@opencascade.com>
Date: Thu, 20 Nov 2014 16:06:53 +0300
Subject: [PATCH] Projection 2D failure due to incorrect detection of distorted
 result faces

---
 src/SMESH/SMESH_MesherHelper.cxx            | 10 +++++-----
 src/StdMeshers/StdMeshers_Projection_2D.cxx |  2 +-
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/src/SMESH/SMESH_MesherHelper.cxx b/src/SMESH/SMESH_MesherHelper.cxx
index 329c17e62..c6c51ab37 100644
--- a/src/SMESH/SMESH_MesherHelper.cxx
+++ b/src/SMESH/SMESH_MesherHelper.cxx
@@ -2575,7 +2575,7 @@ bool SMESH_MesherHelper::IsDistorted2D( SMESH_subMesh* faceSM,
   if ( !smDS || smDS->NbElements() == 0 ) return false;
 
   SMDS_ElemIteratorPtr faceIt = smDS->GetElements();
-  double prevArea2D = 0;
+  double prevArea = 0;
   vector< const SMDS_MeshNode* > nodes;
   vector< gp_XY >                uv;
   bool* toCheckUV = checkUV ? & checkUV : 0;
@@ -2613,15 +2613,15 @@ bool SMESH_MesherHelper::IsDistorted2D( SMESH_subMesh* faceSM,
       uv[ i ] = helper.GetNodeUV( F, nodes[ i ], inFaceNode, toCheckUV );
 
     // compare orientation of triangles
+    double faceArea = 0;
     for ( int iT = 0, nbT = nodes.size()-2; iT < nbT; ++iT )
     {
       gp_XY v1 = uv[ iT+1 ] - uv[ 0 ];
       gp_XY v2 = uv[ iT+2 ] - uv[ 0 ];
-      double area2D = v2 ^ v1;
-      if (( haveBadFaces = ( area2D * prevArea2D < 0 )))
-        break;
-      prevArea2D = area2D;
+      faceArea += v2 ^ v1;
     }
+    haveBadFaces = ( faceArea * prevArea < 0 );
+    prevArea = faceArea;
   }
 
   return haveBadFaces;
diff --git a/src/StdMeshers/StdMeshers_Projection_2D.cxx b/src/StdMeshers/StdMeshers_Projection_2D.cxx
index 057070d1c..7b3d1e1e1 100644
--- a/src/StdMeshers/StdMeshers_Projection_2D.cxx
+++ b/src/StdMeshers/StdMeshers_Projection_2D.cxx
@@ -732,7 +732,7 @@ namespace {
               (( uv - uvBis ).SquareModulus() < tol2d ))
             ++nbOkPos;
           else
-            nbOkPos = 0;
+            nbOkPos = -((int) src2tgtNodes.size() );
           break;
         }
         case SMDS_TOP_EDGE: