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0020843: EDF 1374 : SMESH Projection 2D + Extrusion 3D issue

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* Modify for the case of quasi quadrilateral side face
This commit is contained in:
eap 2010-04-22 07:12:49 +00:00
parent 5e181bb5c5
commit 2ef5167c0a
1 changed files with 105 additions and 18 deletions
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123
src/StdMeshers/StdMeshers_Prism_3D.cxx
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@ -214,6 +214,94 @@ namespace {
return gp_Ax2( O, Z, X);
}
//================================================================================
/*!
* \brief Removes submeshes meshed with regular grid from given list
* \retval int - nb of removed submeshes
*/
//================================================================================
int removeQuasiQuads(list< SMESH_subMesh* >& notQuadSubMesh)
{
int oldNbSM = notQuadSubMesh.size();
SMESHDS_Mesh* mesh = notQuadSubMesh.front()->GetFather()->GetMeshDS();
list< SMESH_subMesh* >::iterator smIt = notQuadSubMesh.begin();
#define __NEXT_SM { ++smIt; continue; }
while ( smIt != notQuadSubMesh.end() )
{
SMESH_subMesh* faceSm = *smIt;
SMESHDS_SubMesh* faceSmDS = faceSm->GetSubMeshDS();
int nbQuads = faceSmDS->NbElements();
if ( nbQuads == 0 ) __NEXT_SM;
// get oredered edges
list< TopoDS_Edge > orderedEdges;
list< int > nbEdgesInWires;
TopoDS_Vertex V000;
int nbWires = SMESH_Block::GetOrderedEdges( TopoDS::Face( faceSm->GetSubShape() ),
V000, orderedEdges, nbEdgesInWires );
if ( nbWires != 1 || nbEdgesInWires.front() <= 4 )
__NEXT_SM;
// get nb of segements on edges
list<int> nbSegOnEdge;
list< TopoDS_Edge >::iterator edge = orderedEdges.begin();
for ( ; edge != orderedEdges.end(); ++edge )
{
if ( SMESHDS_SubMesh* edgeSmDS = mesh->MeshElements( *edge ))
nbSegOnEdge.push_back( edgeSmDS->NbElements() );
else
nbSegOnEdge.push_back(0);
}
// unite nbSegOnEdge of continues edges
int nbEdges = nbEdgesInWires.front();
list<int>::iterator nbSegIt = nbSegOnEdge.begin();
for ( edge = orderedEdges.begin(); edge != orderedEdges.end(); )
{
const TopoDS_Edge& e1 = *edge++;
const TopoDS_Edge& e2 = ( edge == orderedEdges.end() ? orderedEdges.front() : *edge );
if ( SMESH_Algo::IsContinuous( e1, e2 ))
{
// common vertex of continues edges must be shared by two 2D mesh elems of geom face
TopoDS_Vertex vCommon = TopExp::LastVertex( e1, true );
const SMDS_MeshNode* vNode = SMESH_Algo::VertexNode( vCommon, mesh );
int nbF = 0;
if ( vNode )
{
SMDS_ElemIteratorPtr fIt = vNode->GetInverseElementIterator(SMDSAbs_Face);
while ( fIt->more() )
nbF += faceSmDS->Contains( fIt->next() );
}
list<int>::iterator nbSegIt1 = nbSegIt++;
if ( !vNode || nbF == 2 ) // !vNode - two edges can be meshed as one
{
// unite
if ( nbSegIt == nbSegOnEdge.end() ) nbSegIt = nbSegOnEdge.begin();
*nbSegIt += *nbSegIt1;
nbSegOnEdge.erase( nbSegIt1 );
--nbEdges;
}
}
else
{
++nbSegIt;
}
}
vector<int> nbSegVec( nbSegOnEdge.begin(), nbSegOnEdge.end());
if ( nbSegVec.size() == 4 &&
nbSegVec[0] == nbSegVec[2] &&
nbSegVec[1] == nbSegVec[3] &&
nbSegVec[0] * nbSegVec[1] == nbQuads
)
smIt = notQuadSubMesh.erase( smIt );
else
__NEXT_SM;
}
return oldNbSM - notQuadSubMesh.size();
}
}
//=======================================================================
@ -320,7 +408,7 @@ bool StdMeshers_Prism_3D::Compute(SMESH_Mesh& theMesh, const TopoDS_Shape& theSh
// Projections on the top and bottom faces are taken from nodes existing
// on these faces; find correspondence between bottom and top nodes
myBotToColumnMap.clear();
if ( !assocOrProjBottom2Top() ) // it also fill myBotToColumnMap
if ( !assocOrProjBottom2Top() ) // it also fills myBotToColumnMap
return false;
@ -763,19 +851,8 @@ bool StdMeshers_Prism_3D::assocOrProjBottom2Top()
const SMDS_MeshNode* topNode = bN_tN->second;
if ( botNode->GetPosition()->GetTypeOfPosition() != SMDS_TOP_FACE )
continue; // wall columns are contained in myBlock
// compute bottom node params
TNode bN( botNode );
// if ( zSize > 2 ) {
// gp_XYZ paramHint(-1,-1,-1);
// if ( prevTNode.IsNeighbor( bN ))
// paramHint = prevTNode.GetParams();
// if ( !myBlock.ComputeParameters( bN.GetCoords(), bN.ChangeParams(),
// ID_BOT_FACE, paramHint ))
// return error(TCom("Can't compute normalized parameters for node ")
// << botNode->GetID() << " on the face #"<< botSM->GetId() );
// prevTNode = bN;
// }
// create node column
TNode bN( botNode );
TNode2ColumnMap::iterator bN_col =
myBotToColumnMap.insert( make_pair ( bN, TNodeColumn() )).first;
TNodeColumn & column = bN_col->second;
@ -1078,7 +1155,7 @@ bool StdMeshers_PrismAsBlock::Init(SMESH_MesherHelper* helper,
}
// ----------------------------------------------------------------------
// Analyse faces mesh and topology: choose the bottom submesh.
// Analyse mesh and topology of faces: choose the bottom submesh.
// If there are not quadrangle geom faces, they are top and bottom ones.
// Not quadrangle geom faces must be only on top and bottom.
// ----------------------------------------------------------------------
@ -1091,14 +1168,24 @@ bool StdMeshers_PrismAsBlock::Init(SMESH_MesherHelper* helper,
bool hasNotQuad = ( nbNotQuad || nbNotQuadMeshed );
// detect bad cases
if ( nbNotQuad > 0 && nbNotQuad != 2 )
return error(COMPERR_BAD_SHAPE,
TCom("More than 2 not quadrilateral faces: ")
<<nbNotQuad);
if ( nbNotQuadMeshed > 2 )
{
return error(COMPERR_BAD_INPUT_MESH,
TCom("More than 2 faces with not quadrangle elements: ")
<<nbNotQuadMeshed);
}
int nbQuasiQuads = 0;
if ( nbNotQuad > 0 && nbNotQuad != 2 )
{
// Issue 0020843 - one of side faces is quasi-quadrilateral.
// Remove from notQuadGeomSubMesh faces meshed with regular grid
nbQuasiQuads = removeQuasiQuads( notQuadGeomSubMesh );
nbNotQuad -= nbQuasiQuads;
if ( nbNotQuad > 0 && nbNotQuad != 2 )
return error(COMPERR_BAD_SHAPE,
TCom("More than 2 not quadrilateral faces: ")
<<nbNotQuad);
}
// get found submeshes
if ( hasNotQuad )