Updated for NPAL15716.

src/NETGENPlugin/NETGENPlugin_NETGEN_3D.cxx

@@ -38,6 +38,7 @@
 #include "SMESH_Gen.hxx"
 #include "SMESH_Mesh.hxx"
 #include "SMESH_MesherHelper.hxx"
+#include "StdMeshers_QuadToTriaAdaptor.hxx"
 
 #include <BRep_Tool.hxx>
 #include <TopExp.hxx>
@@ -179,6 +180,9 @@ bool NETGENPlugin_NETGEN_3D::Compute(SMESH_Mesh&         aMesh,
   map< int, int* >::iterator shId_ngId;
   list< int > degenNgIds;
 
+  StdMeshers_QuadToTriaAdaptor Adaptor;
+  Adaptor.Compute(aMesh,aShape);
+
   for (TopExp_Explorer exp(aShape,TopAbs_FACE);exp.More();exp.Next())
   {
     const TopoDS_Shape& aShapeFace = exp.Current();
@@ -195,9 +199,31 @@ bool NETGENPlugin_NETGEN_3D::Compute(SMESH_Mesh&         aMesh,
         if ( !elem )
           return error( COMPERR_BAD_INPUT_MESH, "Null element encounters");
         bool isTraingle = ( elem->NbNodes()==3 || (_quadraticMesh && elem->NbNodes()==6 ));
-        if ( !isTraingle )
+        if ( !isTraingle ) {
+          //return error( COMPERR_BAD_INPUT_MESH,
+          //              SMESH_Comment("Not triangle element ")<<elem->GetID());
+          // using adaptor
+          std::list<const SMDS_FaceOfNodes*> faces = Adaptor.GetTriangles(elem);
+          if(faces.size()==0) {
             return error( COMPERR_BAD_INPUT_MESH,
-                        SMESH_Comment("Not triangle element ")<<elem->GetID());
+                          SMESH_Comment("Not triangles in adaptor for element ")<<elem->GetID());
+          }
+          std::list<const SMDS_FaceOfNodes*>::iterator itf = faces.begin();
+          for(; itf!=faces.end(); itf++ ) {
+            triangles.push_back( (*itf) );
+            isReversed.push_back( isRev );
+            // put triange's nodes to nodeToNetgenID map
+            SMDS_ElemIteratorPtr triangleNodesIt = (*itf)->nodesIterator();
+            while ( triangleNodesIt->more() ) {
+              const SMDS_MeshNode * node =
+                static_cast<const SMDS_MeshNode *>(triangleNodesIt->next());
+              if(myTool->IsMedium(node))
+                continue;
+              nodeToNetgenID.insert( make_pair( node, invalid_ID ));
+            }
+          }
+        }
+        else {
           // keep a triangle
           triangles.push_back( elem );
           isReversed.push_back( isRev );
@@ -210,6 +236,7 @@ bool NETGENPlugin_NETGEN_3D::Compute(SMESH_Mesh&         aMesh,
               continue;
             nodeToNetgenID.insert( make_pair( node, invalid_ID ));
           }
+        }
 #ifdef _DEBUG_
         // check if a trainge is degenerated
         areaControl.GetPoints( elem, nodesCoords );
@@ -413,19 +440,40 @@ bool NETGENPlugin_NETGEN_3D::Compute(SMESH_Mesh& aMesh,
   else if (MeshType == SMESH_MesherHelper::QUADRATIC)
     _quadraticMesh = true;
     
-  SMDS_FaceIteratorPtr iteratorFace = MeshDS->facesIterator();
+  StdMeshers_QuadToTriaAdaptor Adaptor;
+  Adaptor.Compute(aMesh);
 
-  while(iteratorFace->more())
+  SMDS_FaceIteratorPtr iteratorFace = MeshDS->facesIterator();
-  {
+  while(iteratorFace->more()) {
     // check element
     const SMDS_MeshElement* elem = iteratorFace->next();
     if ( !elem )
       return error( COMPERR_BAD_INPUT_MESH, "Null element encounters");
     bool isTraingle = ( elem->NbNodes()==3 || (_quadraticMesh && elem->NbNodes()==6 ));
-    if ( !isTraingle )
+    if ( !isTraingle ) {
+      //return error( COMPERR_BAD_INPUT_MESH,
+      //              SMESH_Comment("Not triangle element ")<<elem->GetID());
+      // using adaptor
+      std::list<const SMDS_FaceOfNodes*> faces = Adaptor.GetTriangles(elem);
+      if(faces.size()==0) {
         return error( COMPERR_BAD_INPUT_MESH,
-                    SMESH_Comment("Not triangle element ")<<elem->GetID());
+                      SMESH_Comment("Not triangles in adaptor for element ")<<elem->GetID());
-    
+      }
+      std::list<const SMDS_FaceOfNodes*>::iterator itf = faces.begin();
+      for(; itf!=faces.end(); itf++ ) {
+        triangles.push_back( (*itf) );
+        // put triange's nodes to nodeToNetgenID map
+        SMDS_ElemIteratorPtr triangleNodesIt = (*itf)->nodesIterator();
+        while ( triangleNodesIt->more() ) {
+          const SMDS_MeshNode * node =
+            static_cast<const SMDS_MeshNode *>(triangleNodesIt->next());
+          if(aHelper->IsMedium(node))
+            continue;
+          nodeToNetgenID.insert( make_pair( node, invalid_ID ));
+        }
+      }
+    }
+    else {
       // keep a triangle
       triangles.push_back( elem );
       // put elem nodes to nodeToNetgenID map
@@ -435,10 +483,10 @@ bool NETGENPlugin_NETGEN_3D::Compute(SMESH_Mesh& aMesh,
           static_cast<const SMDS_MeshNode *>(triangleNodesIt->next());
         if(aHelper->IsMedium(node))
           continue;
-      
         nodeToNetgenID.insert( make_pair( node, invalid_ID ));
       }
     }
+  }
 
   // ---------------------------------
   // Feed the Netgen with surface mesh