Bug 0019943: Pb with projection 2d. Fix for a seam edge on not really closed face.

src/SMESH/SMESH_MesherHelper.cxx

@@ -32,6 +32,7 @@
 #include <BRepAdaptor_Surface.hxx>
 #include <BRepTools.hxx>
 #include <BRep_Tool.hxx>
+#include <BRepTools_WireExplorer.hxx>
 #include <Geom2d_Curve.hxx>
 #include <Geom_Curve.hxx>
 #include <Geom_Surface.hxx>
@@ -169,11 +170,29 @@ void SMESH_MesherHelper::SetSubShape(const TopoDS_Shape& aSh)
     BRepAdaptor_Surface surface( face );
     if ( surface.IsUPeriodic() || surface.IsVPeriodic() )
     {
-      for ( TopExp_Explorer exp( face, TopAbs_EDGE ); exp.More(); exp.Next())
+      for (TopExp_Explorer exp( face, TopAbs_EDGE ); exp.More(); exp.Next())
       {
         // look for a seam edge
         const TopoDS_Edge& edge = TopoDS::Edge( exp.Current() );
-        if ( BRep_Tool::IsClosed( edge, face )) {
+        bool isClosed = BRep_Tool::IsClosed( edge, face );
+        // BEGIN: jfa for bug 0019943
+        if (isClosed) {
+          MESSAGE("$$$ CLOSED 1 $$$")
+          isClosed = false;
+          for (TopExp_Explorer expw (face, TopAbs_WIRE); expw.More() && !isClosed; expw.Next()) {
+            const TopoDS_Wire& wire = TopoDS::Wire(expw.Current());
+            int nbe = 0;
+            for (BRepTools_WireExplorer we (wire, face); we.More() && !isClosed; we.Next()) {
+              if (we.Current().IsSame(edge)) {
+                nbe++;
+                if (nbe == 2) isClosed = true;
+              }
+            }
+          }
+        }
+        // END: jfa for bug 0019943
+        if (isClosed) {
+          MESSAGE("$$$ CLOSED 2 $$$")
           // initialize myPar1, myPar2 and myParIndex
           if ( mySeamShapeIds.empty() ) {
             gp_Pnt2d uv1, uv2;

src/SMESH/SMESH_Pattern.cxx

@@ -634,7 +634,23 @@ bool SMESH_Pattern::Load (SMESH_Mesh*        theMesh,
     // vertices
     for ( elIt = eList.begin(); elIt != eList.end(); elIt++ ) {
       myShapeIDMap.Add( TopExp::FirstVertex( *elIt, true ));
-      if ( BRep_Tool::IsClosed( *elIt, theFace ) )
+      bool isClosed1 = BRep_Tool::IsClosed( *elIt, theFace );
+      // BEGIN: jfa for bug 0019943
+      if (isClosed1) {
+        isClosed1 = false;
+        for (TopExp_Explorer expw (theFace, TopAbs_WIRE); expw.More() && !isClosed1; expw.Next()) {
+          const TopoDS_Wire& wire = TopoDS::Wire(expw.Current());
+          int nbe = 0;
+          for (BRepTools_WireExplorer we (wire, theFace); we.More() && !isClosed1; we.Next()) {
+            if (we.Current().IsSame(*elIt)) {
+              nbe++;
+              if (nbe == 2) isClosed1 = true;
+            }
+          }
+        }
+      }
+      // END: jfa for bug 0019943
+      if (isClosed1)
         myShapeIDMap.Add( TopExp::LastVertex( *elIt, true ));
       SMESHDS_SubMesh * eSubMesh = aMeshDS->MeshElements( *elIt );
       if ( eSubMesh )
@@ -2060,7 +2076,6 @@ bool SMESH_Pattern::
     }
   }
 
-    
   return true;
 }
 
@@ -2354,7 +2369,23 @@ bool SMESH_Pattern::Apply (const TopoDS_Face&   theFace,
   list<TopoDS_Edge>::iterator elIt = eList.begin();
   for ( ; elIt != eList.end(); elIt++ ) {
     myShapeIDMap.Add( TopExp::FirstVertex( *elIt, true ));
-    if ( BRep_Tool::IsClosed( *elIt, theFace ) )
+    bool isClosed1 = BRep_Tool::IsClosed( *elIt, theFace );
+    // BEGIN: jfa for bug 0019943
+    if (isClosed1) {
+      isClosed1 = false;
+      for (TopExp_Explorer expw (theFace, TopAbs_WIRE); expw.More() && !isClosed1; expw.Next()) {
+        const TopoDS_Wire& wire = TopoDS::Wire(expw.Current());
+        int nbe = 0;
+        for (BRepTools_WireExplorer we (wire, theFace); we.More() && !isClosed1; we.Next()) {
+          if (we.Current().IsSame(*elIt)) {
+            nbe++;
+            if (nbe == 2) isClosed1 = true;
+          }
+        }
+      }
+    }
+    // END: jfa for bug 0019943
+    if (isClosed1)
       myShapeIDMap.Add( TopExp::LastVertex( *elIt, true ));
   }
   int nbVertices = myShapeIDMap.Extent();
@@ -4549,9 +4580,28 @@ bool SMESH_Pattern::setShapeToMesh(const TopoDS_Shape& theShape)
   if ( myIs2D ) {
     TopoDS_Face face = TopoDS::Face( theShape );
     TopExp_Explorer eExp( theShape, TopAbs_EDGE );
-    for ( ; eExp.More() && nbNodeOnSeamEdge == 0; eExp.Next() )
+    for ( ; eExp.More() && nbNodeOnSeamEdge == 0; eExp.Next() ) {
-      if ( BRep_Tool::IsClosed( TopoDS::Edge( eExp.Current() ), face ))
+      const TopoDS_Edge& ee = TopoDS::Edge(eExp.Current());
+      bool isClosed1 = BRep_Tool::IsClosed(ee, face);
+      // BEGIN: jfa for bug 0019943
+      if (isClosed1) {
+        isClosed1 = false;
+        for (TopExp_Explorer expw (face, TopAbs_WIRE); expw.More() && !isClosed1; expw.Next()) {
+          const TopoDS_Wire& wire = TopoDS::Wire(expw.Current());
+          int nbe = 0;
+          for (BRepTools_WireExplorer we (wire, face); we.More() && !isClosed1; we.Next()) {
+            if (we.Current().IsSame(ee)) {
+              nbe++;
+              if (nbe == 2) isClosed1 = true;
+            }
+          }
+        }
+      }
+      // END: jfa for bug 0019943
+      if (isClosed1) {
         nbNodeOnSeamEdge = 2;
+      }
+    }
   }
 
   // check nb of vertices