Regression of 21397: a quadrangle face mesh can't be projected to a cylinder

[modules/smesh.git] / src / StdMeshers / StdMeshers_Hexa_3D.cxx

diff --git a/src/StdMeshers/StdMeshers_Hexa_3D.cxx b/src/StdMeshers/StdMeshers_Hexa_3D.cxx
index f6dcd1518ecc8f24d801c66a41acd863ee09706e..8c54ad4e801a676338b67a2c7bbb0c2fa9290daa 100644 (file)
--- a/src/StdMeshers/StdMeshers_Hexa_3D.cxx
+++ b/src/StdMeshers/StdMeshers_Hexa_3D.cxx
@@ -124,23 +124,17 @@ bool StdMeshers_Hexa_3D::CheckHypothesis
     return true;
   }
 
+  // only StdMeshers_ViscousLayers can be used
   aStatus = HYP_OK;
   for ( ; h != hyps.end(); ++h )
   {
-    string hypName = (*h)->GetName();
-    if ( find( _compatibleHypothesis.begin(),_compatibleHypothesis.end(),hypName )
-         != _compatibleHypothesis.end() )
-    {
-      _viscousLayersHyp = dynamic_cast< const StdMeshers_ViscousLayers*> ( *h );
-    }
-    else
-    {
-      aStatus = HYP_INCOMPATIBLE;
-    }
+    if ( !(_viscousLayersHyp = dynamic_cast< const StdMeshers_ViscousLayers*> ( *h )))
+      break;
   }
-
   if ( !_viscousLayersHyp )
     aStatus = HYP_INCOMPATIBLE;
+  else
+    error( _viscousLayersHyp->CheckHypothesis( aMesh, aShape, aStatus ));
 
   return aStatus == HYP_OK;
 }
@@ -287,9 +281,9 @@ namespace
 //=============================================================================
 /*!
  * Generates hexahedron mesh on hexaedron like form using algorithm from
- * "Application de l'interpolation transfinie à la création de maillages
+ * "Application de l'interpolation transfinie � la cr�ation de maillages
  *  C0 ou G1 continus sur des triangles, quadrangles, tetraedres, pentaedres
- *  et hexaedres déformés."
+ *  et hexaedres d�form�s."
  * Alain PERONNET - 8 janvier 1999
  */
 //=============================================================================
@@ -371,8 +365,9 @@ bool StdMeshers_Hexa_3D::Compute(SMESH_Mesh &         aMesh,
     for ( int i = 0; i < 6; ++i )
     {
       const TopoDS_Face& sideF = aCubeSide[i]._quad->face;
-      if ( !SMESH_MesherHelper::IsSameElemGeometry( meshDS->MeshElements( sideF ),
-                                                    SMDSGeom_QUADRANGLE,
+      const SMESHDS_SubMesh* smDS =
+        proxymesh ? proxymesh->GetSubMesh( sideF ) : meshDS->MeshElements( sideF );
+      if ( !SMESH_MesherHelper::IsSameElemGeometry( smDS, SMDSGeom_QUADRANGLE,
                                                     /*nullSubMeshRes=*/false ))
       {
         SMESH_ComputeErrorPtr err = ComputePentahedralMesh(aMesh, aShape, proxymesh.get());
@@ -741,6 +736,39 @@ bool StdMeshers_Hexa_3D::Compute(SMESH_Mesh & aMesh, SMESH_MesherHelper* aHelper
   return error( algo->GetComputeError());
 }
 
+//================================================================================
+/*!
+ * \brief Return true if the algorithm can mesh this shape
+ *  \param [in] aShape - shape to check
+ *  \param [in] toCheckAll - if true, this check returns OK if all shapes are OK,
+ *              else, returns OK if at least one shape is OK
+ */
+//================================================================================
+
+bool StdMeshers_Hexa_3D::IsApplicable( const TopoDS_Shape & aShape, bool toCheckAll )
+{
+  TopExp_Explorer exp0( aShape, TopAbs_SOLID );
+  if ( !exp0.More() ) return false;
+
+  for ( ; exp0.More(); exp0.Next() )
+  {
+    int nbFoundShells = 0;
+    TopExp_Explorer exp1( exp0.Current(), TopAbs_SHELL );
+    for ( ; exp1.More(); exp1.Next(), ++nbFoundShells)
+      if ( nbFoundShells == 2 ) break;
+    if ( nbFoundShells != 1 ) {
+      if ( toCheckAll ) return false;
+      continue;
+    }   
+    exp1.Init( exp0.Current(), TopAbs_FACE );
+    int nbEdges = SMESH_MesherHelper::Count( exp1.Current(), TopAbs_EDGE, /*ignoreSame=*/true );
+    bool ok = ( nbEdges > 3 );
+    if ( toCheckAll && !ok ) return false;
+    if ( !toCheckAll && ok ) return true;
+  }
+  return toCheckAll;
+};
+
 //=======================================================================
 //function : ComputePentahedralMesh
 //purpose  :