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IPAL0054631: NETGEN-1D2D3D fails on two adjacent boxes with Viscous Layers

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Bug reported in https://www.salome-platform.org/forum/forum_14/64297494#556145973
This commit is contained in:
eap 2020-03-27 22:43:20 +03:00
parent d487f882d9
commit cfa95f0477
3 changed files with 102 additions and 19 deletions
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27
src/SMESH/SMESH_ProxyMesh.cxx
View File

@ -639,6 +639,33 @@ SMDS_ElemIteratorPtr SMESH_ProxyMesh::GetInverseElementIterator(const SMDS_MeshN
return iter;
}
//================================================================================
/*!
* \brief Check if a FACE has prisms on its both sides
* \param [in] smFace - sub-mesh of the FACE. NOT a proxy sub-mesh!
* \return bool - true if there are prisms on the two sides
*/
//================================================================================
bool SMESH_ProxyMesh::HasPrismsOnTwoSides( SMESHDS_SubMesh* smFace )
{
if ( !smFace || smFace->NbElements() == 0 )
return false;
SMDS_ElemIteratorPtr faces = smFace->GetElements();
while ( faces->more() )
{
const SMDS_MeshElement* f = faces->next();
std::vector<const SMDS_MeshNode*> fNodes( f->begin_nodes(), f->end_nodes() );
std::vector<const SMDS_MeshElement*> vols;
if ( SMDS_Mesh::GetElementsByNodes( fNodes, vols, SMDSAbs_Volume ) < 2 )
return false;
return ( vols[0]->NbCornerNodes() == 2 * f->NbCornerNodes() &&
vols[1]->NbCornerNodes() == 2 * f->NbCornerNodes() );
}
return false;
}
//================================================================================
/*!
* \brief SubMesh Constructor

3
src/SMESH/SMESH_ProxyMesh.hxx
View File

@ -135,7 +135,8 @@ public:
SMDS_ElemIteratorPtr GetInverseElementIterator(const SMDS_MeshNode* node,
SMDSAbs_ElementType type) const;
// Check if a FACE has prisms on its both sides
static bool HasPrismsOnTwoSides( SMESHDS_SubMesh* faceSM );
SMESH_Mesh* GetMesh() const { return const_cast<SMESH_Mesh*>( _mesh ); }

91
src/StdMeshers/StdMeshers_QuadToTriaAdaptor.cxx
View File

@ -307,6 +307,37 @@ namespace
return false; // == "algo fails"
}
//================================================================================
/*!
* \brief Check if a face is in a SOLID
*/
//================================================================================
bool isInSolid( vector<const SMDS_MeshNode*> & faceNodes,
const int nbNodes,
const int solidID )
{
if ( !faceNodes[0] )
return true; // NOT_QUAD
for ( int i = 0; i < nbNodes; ++i )
{
int shapeID = faceNodes[i]->GetShapeID();
if ( shapeID == solidID )
return true;
}
faceNodes.resize( nbNodes );
std::vector<const SMDS_MeshElement*> vols;
SMDS_Mesh::GetElementsByNodes( faceNodes, vols, SMDSAbs_Volume );
bool inSolid = false;
for ( size_t i = 0; i < vols.size() && !inSolid; ++i )
{
int shapeID = vols[i]->GetShapeID();
inSolid = ( shapeID == solidID );
}
faceNodes.push_back( faceNodes[0] );
return inSolid;
}
}
//================================================================================
@ -850,8 +881,7 @@ bool StdMeshers_QuadToTriaAdaptor::Compute(SMESH_Mesh& aMesh,
{
SMESH_ProxyMesh::setMesh( aMesh );
if ( aShape.ShapeType() != TopAbs_SOLID &&
aShape.ShapeType() != TopAbs_SHELL )
if ( aShape.ShapeType() != TopAbs_SOLID )
return false;
myShape = aShape;
@ -860,8 +890,8 @@ bool StdMeshers_QuadToTriaAdaptor::Compute(SMESH_Mesh& aMesh,
const SMESHDS_SubMesh * aSubMeshDSFace;
SMESHDS_Mesh * meshDS = aMesh.GetMeshDS();
SMESH_MesherHelper helper(aMesh);
helper.IsQuadraticSubMesh(aShape);
SMESH_MesherHelper helper1(aMesh);
helper1.IsQuadraticSubMesh(aShape);
if ( myElemSearcher ) delete myElemSearcher;
vector< SMDS_ElemIteratorPtr > itVec;
@ -885,6 +915,7 @@ bool StdMeshers_QuadToTriaAdaptor::Compute(SMESH_Mesh& aMesh,
vector<const SMDS_MeshNode*> FNodes(5);
gp_Pnt PC;
gp_Vec VNorm;
const int solidID = meshDS->ShapeToIndex( aShape );
for ( TopExp_Explorer exp(aShape,TopAbs_FACE); exp.More(); exp.Next() )
{
@ -893,22 +924,46 @@ bool StdMeshers_QuadToTriaAdaptor::Compute(SMESH_Mesh& aMesh,
aSubMeshDSFace = aProxyMesh->GetSubMesh( aShapeFace );
else
aSubMeshDSFace = meshDS->MeshElements( aShapeFace );
if ( !aSubMeshDSFace )
continue;
vector<const SMDS_MeshElement*> trias, quads;
bool hasNewTrias = false;
if ( aSubMeshDSFace )
const bool toCheckFaceInSolid =
aProxyMesh ? aProxyMesh->HasPrismsOnTwoSides( meshDS->MeshElements( aShapeFace )) : false;
if ( toCheckFaceInSolid && !dynamic_cast< const SMESH_ProxyMesh::SubMesh* >( aSubMeshDSFace ))
continue; // no room for pyramids as prisms are on both sides
{
bool isRev = false;
if ( helper.NbAncestors( aShapeFace, aMesh, aShape.ShapeType() ) > 1 )
isRev = helper.IsReversedSubMesh( TopoDS::Face(aShapeFace) );
bool isRevGlob = false;
SMESH_MesherHelper helper2( aMesh );
PShapeIteratorPtr sIt = helper2.GetAncestors( aShapeFace, aMesh, aShape.ShapeType() );
while ( const TopoDS_Shape * solid = sIt->next() )
if ( !solid->IsSame( aShape ))
{
isRevGlob = helper2.IsReversedSubMesh( TopoDS::Face( aShapeFace ));
if ( toCheckFaceInSolid )
helper2.IsQuadraticSubMesh( *solid );
break;
}
SMDS_ElemIteratorPtr iteratorElem = aSubMeshDSFace->GetElements();
while ( iteratorElem->more() ) // loop on elements on a geometrical face
{
const SMDS_MeshElement* face = iteratorElem->next();
// preparation step to get face info
int stat = Preparation(face, PN, VN, FNodes, PC, VNorm);
int stat = Preparation( face, PN, VN, FNodes, PC, VNorm );
bool isRev = isRevGlob;
SMESH_MesherHelper* helper = &helper1;
if ( toCheckFaceInSolid && !isInSolid( FNodes, face->NbCornerNodes(), solidID ))
{
isRev = !isRevGlob;
helper = &helper2;
}
switch ( stat )
{
case NOT_QUAD:
@ -921,11 +976,11 @@ bool StdMeshers_QuadToTriaAdaptor::Compute(SMESH_Mesh& aMesh,
// degenerate face
// add triangles to result map
SMDS_MeshFace* NewFace;
helper.SetElementsOnShape( false );
helper->SetElementsOnShape( false );
if(!isRev)
NewFace = helper.AddFace( FNodes[0], FNodes[1], FNodes[2] );
NewFace = helper->AddFace( FNodes[0], FNodes[1], FNodes[2] );
else
NewFace = helper.AddFace( FNodes[0], FNodes[2], FNodes[1] );
NewFace = helper->AddFace( FNodes[0], FNodes[2], FNodes[1] );
storeTmpElement( NewFace );
trias.push_back ( NewFace );
quads.push_back( face );
@ -962,22 +1017,22 @@ bool StdMeshers_QuadToTriaAdaptor::Compute(SMESH_Mesh& aMesh,
return false;
}
// create node at PCbest
helper.SetElementsOnShape( true );
SMDS_MeshNode* NewNode = helper.AddNode( PCbest.X(), PCbest.Y(), PCbest.Z() );
helper->SetElementsOnShape( true );
SMDS_MeshNode* NewNode = helper->AddNode( PCbest.X(), PCbest.Y(), PCbest.Z() );
// create a pyramid
SMDS_MeshVolume* aPyram;
if ( isRev )
aPyram = helper.AddVolume( FNodes[0], FNodes[3], FNodes[2], FNodes[1], NewNode );
aPyram = helper->AddVolume( FNodes[0], FNodes[3], FNodes[2], FNodes[1], NewNode );
else
aPyram = helper.AddVolume( FNodes[0], FNodes[1], FNodes[2], FNodes[3], NewNode );
aPyram = helper->AddVolume( FNodes[0], FNodes[1], FNodes[2], FNodes[3], NewNode );
myPyramids.push_back(aPyram);
// add triangles to result map
helper.SetElementsOnShape( false );
helper->SetElementsOnShape( false );
for ( i = 0; i < 4; i++ )
{
trias.push_back ( helper.AddFace( NewNode, FNodes[i], FNodes[i+1] ));
trias.push_back ( helper->AddFace( NewNode, FNodes[i], FNodes[i+1] ));
storeTmpElement( trias.back() );
}