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0020958: EDF 1529 SMESH : If some faces have been meshed with small

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quadrangles Netgen 3D creates pyramids with volume zero and fails

* Use SMDS_Mesh::facesIterator(/*idInceasingOrder=*/true) instead of TIDSortedElemSet
* Enable showing bad mesh elements in case of computing w/o shape
This commit is contained in:
eap 2010-08-19 09:32:34 +00:00
parent bb1f5ab1e0
commit e7aeba552a
1 changed files with 30 additions and 21 deletions
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49
src/NETGENPlugin/NETGENPlugin_NETGEN_3D.cxx
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@ -423,22 +423,19 @@ bool NETGENPlugin_NETGEN_3D::Compute(SMESH_Mesh& aMesh,
_quadraticMesh = true;
StdMeshers_QuadToTriaAdaptor Adaptor;
if ( aMesh.NbQuadrangles() > 0 )
Adaptor.Compute(aMesh);
SMDS_FaceIteratorPtr fIt = MeshDS->facesIterator();
TIDSortedElemSet sortedFaces; // 0020279: control the "random" use when using mesh algorithms
while( fIt->more()) sortedFaces.insert( fIt->next() );
TIDSortedElemSet::iterator itFace = sortedFaces.begin(), fEnd = sortedFaces.end();
for ( ; itFace != fEnd; ++itFace )
SMDS_FaceIteratorPtr fIt = MeshDS->facesIterator(/*idInceasingOrder=*/true);
while( fIt->more())
{
// check element
const SMDS_MeshElement* elem = *itFace;
const SMDS_MeshElement* elem = fIt->next();
if ( !elem )
return error( COMPERR_BAD_INPUT_MESH, "Null element encounters");
vector< const SMDS_MeshElement* > trias;
bool isTraingle = ( elem->NbNodes() == ( elem->IsQuadratic() ? 6 : 3 ));
bool isTraingle = ( elem->NbCornerNodes() == 3 );
if ( !isTraingle ) {
// using adaptor
const list<const SMDS_FaceOfNodes*>* faces = Adaptor.GetTriangles(elem);
@ -508,6 +505,13 @@ bool NETGENPlugin_NETGEN_3D::Compute(SMESH_Mesh& aMesh,
Ng_AddSurfaceElement(Netgen_mesh, NG_TRIG, Netgen_triangle);
}
// vector of nodes in which node index == netgen ID
vector< const SMDS_MeshNode* > nodeVec ( nodeToNetgenID.size() + 1 );
// insert old nodes into nodeVec
for ( n_id = nodeToNetgenID.begin(); n_id != nodeToNetgenID.end(); ++n_id )
nodeVec.at( n_id->second ) = n_id->first;
nodeToNetgenID.clear();
// -------------------------
// Generate the volume mesh
// -------------------------
@ -531,11 +535,17 @@ bool NETGENPlugin_NETGEN_3D::Compute(SMESH_Mesh& aMesh,
status = NG_VOLUME_FAILURE;
}
catch (...) {
error("Bad mesh input!!!");
error("Exception in Ng_GenerateVolumeMesh()");
status = NG_VOLUME_FAILURE;
}
if ( GetComputeError()->IsOK() ) {
error( status, "Bad mesh input!!!");
switch ( status ) {
case NG_SURFACE_INPUT_ERROR:error( status, "NG_SURFACE_INPUT_ERROR");
case NG_VOLUME_FAILURE: error( status, "NG_VOLUME_FAILURE");
case NG_STL_INPUT_ERROR: error( status, "NG_STL_INPUT_ERROR");
case NG_SURFACE_FAILURE: error( status, "NG_SURFACE_FAILURE");
case NG_FILE_NOT_FOUND: error( status, "NG_FILE_NOT_FOUND");
};
}
int Netgen_NbOfNodesNew = Ng_GetNP(Netgen_mesh);
@ -550,25 +560,24 @@ bool NETGENPlugin_NETGEN_3D::Compute(SMESH_Mesh& aMesh,
// Feed back the SMESHDS with the generated Nodes and Volume Elements
// -------------------------------------------------------------------
if ( status == NG_VOLUME_FAILURE )
{
SMESH_ComputeErrorPtr err = NETGENPlugin_Mesher::readErrors(nodeVec);
if ( err && !err->myBadElements.empty() )
error( err );
}
bool isOK = ( Netgen_NbOfTetra > 0 );// get whatever built
if ( isOK )
{
// vector of nodes in which node index == netgen ID
vector< const SMDS_MeshNode* > nodeVec ( Netgen_NbOfNodesNew + 1 );
// insert old nodes into nodeVec
for ( n_id = nodeToNetgenID.begin(); n_id != nodeToNetgenID.end(); ++n_id ) {
nodeVec.at( n_id->second ) = n_id->first;
}
// create and insert new nodes into nodeVec
nodeVec.resize( Netgen_NbOfNodesNew + 1 );
int nodeIndex = Netgen_NbOfNodes + 1;
for ( ; nodeIndex <= Netgen_NbOfNodesNew; ++nodeIndex )
{
Ng_GetPoint( Netgen_mesh, nodeIndex, Netgen_point );
SMDS_MeshNode * node = aHelper->AddNode(Netgen_point[0],
Netgen_point[1],
Netgen_point[2]);
nodeVec.at(nodeIndex) = node;
nodeVec.at(nodeIndex) = aHelper->AddNode(Netgen_point[0],Netgen_point[1],Netgen_point[2]);
}
// create tetrahedrons