From: eap <eap@opencascade.com>
Date: Mon, 16 May 2011 14:20:24 +0000 (+0000)
Subject: 0021263: EDF 1868: Several use cases fail (regressions)
X-Git-Tag: V6_3_0b2~6
X-Git-Url: http://git.salome-platform.org/gitweb/?a=commitdiff_plain;h=813e18e7bf907d24938452bf742eb33c256cc11f;p=modules%2Fsmesh.git

0021263: EDF 1868: Several use cases fail (regressions)

+ * \brief Wrapper over TopExp::FirstVertex() and TopExp::LastVertex() fixing them
+ *  in the case of INTERNAL edge
+ */
+//================================================================================
+
+TopoDS_Vertex SMESH_MesherHelper::IthVertex( const bool  is2nd,
+                                             TopoDS_Edge anEdge,
+                                             const bool  CumOri )
---

diff --git a/src/SMESH/SMESH_MesherHelper.cxx b/src/SMESH/SMESH_MesherHelper.cxx
index e6d7d84fe..e6e832b76 100644
--- a/src/SMESH/SMESH_MesherHelper.cxx
+++ b/src/SMESH/SMESH_MesherHelper.cxx
@@ -1756,6 +1756,28 @@ bool SMESH_MesherHelper::IsClosedEdge( const TopoDS_Edge& anEdge )
   return TopExp::FirstVertex( anEdge ).IsSame( TopExp::LastVertex( anEdge ));
 }
 
+//================================================================================
+/*!
+ * \brief Wrapper over TopExp::FirstVertex() and TopExp::LastVertex() fixing them
+ *  in the case of INTERNAL edge
+ */
+//================================================================================
+
+TopoDS_Vertex SMESH_MesherHelper::IthVertex( const bool  is2nd,
+                                             TopoDS_Edge anEdge,
+                                             const bool  CumOri )
+{
+  if ( anEdge.Orientation() >= TopAbs_INTERNAL )
+    anEdge.Orientation( TopAbs_FORWARD );
+
+  const TopAbs_Orientation tgtOri = is2nd ? TopAbs_REVERSED : TopAbs_FORWARD;
+  TopoDS_Iterator vIt( anEdge, CumOri );
+  while ( vIt.More() && vIt.Value().Orientation() != tgtOri )
+    vIt.Next();
+
+  return ( vIt.More() ? TopoDS::Vertex(vIt.Value()) : TopoDS_Vertex() );
+}
+
 //=======================================================================
 //function : IsQuadraticMesh
 //purpose  : Check mesh without geometry for: if all elements on this shape are quadratic,
diff --git a/src/SMESH/SMESH_MesherHelper.hxx b/src/SMESH/SMESH_MesherHelper.hxx
index 087c515f0..79b7d0cab 100644
--- a/src/SMESH/SMESH_MesherHelper.hxx
+++ b/src/SMESH/SMESH_MesherHelper.hxx
@@ -147,6 +147,8 @@ public:
 
   static bool IsClosedEdge( const TopoDS_Edge& anEdge );
 
+  static TopoDS_Vertex IthVertex( const bool is2nd, TopoDS_Edge anEdge, const bool CumOri=true );
+
 
 public:
   // ---------- PUBLIC INSTANCE METHODS ----------