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0020676: EDF 1212 GEOM: Partition operation creates vertices which causes mesh computation to fail with netgen

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* Fix for internal edges
This commit is contained in:
eap 2010-02-11 08:26:40 +00:00
parent 7be9f329c4
commit 13623edbcc
2 changed files with 75 additions and 44 deletions
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93
src/StdMeshers/StdMeshers_FaceSide.cxx
View File

@ -44,6 +44,7 @@
#include <BRep_Tool.hxx>
#include <TopExp.hxx>
#include <TopExp_Explorer.hxx>
#include <TopoDS.hxx>
#include <TopoDS_Face.hxx>
#include <TopoDS_Vertex.hxx>
#include <TopoDS_Wire.hxx>
@ -103,6 +104,7 @@ StdMeshers_FaceSide::StdMeshers_FaceSide(const TopoDS_Face& theFace,
int nbDegen = 0;
list<TopoDS_Edge>::iterator edge = theEdges.begin();
TopoDS_Iterator vExp;
for ( int index = 0; edge != theEdges.end(); ++index, ++edge )
{
int i = theIsForward ? index : nbEdges - index - 1;
@ -129,16 +131,20 @@ StdMeshers_FaceSide::StdMeshers_FaceSide(const TopoDS_Face& theFace,
myNbPonits += nbN;
myNbSegments += sm->NbElements();
}
if ( SMESH_Algo::VertexNode( TopExp::FirstVertex( *edge, 1), meshDS ))
vExp.Initialize( *edge );
if ( SMESH_Algo::VertexNode( TopoDS::Vertex( vExp.Value()), meshDS ))
myNbPonits += 1; // for the first end
else
myMissingVertexNodes = true;
}
if ( SMESH_Algo::VertexNode( TopExp::LastVertex( theEdges.back(), 1), meshDS ))
myNbPonits++; // for the last end
else
myMissingVertexNodes = true;
vExp.Next();
if ( vExp.More() )
{
if ( SMESH_Algo::VertexNode( TopoDS::Vertex( vExp.Value()), meshDS ))
myNbPonits++; // for the last end
else
myMissingVertexNodes = true;
}
if ( nbEdges > 1 && myLength > DBL_MIN ) {
const double degenNormLen = 1.e-5;
double totLength = myLength;
@ -206,9 +212,11 @@ const vector<UVPtStruct>& StdMeshers_FaceSide::GetUVPtStruct(bool isXConst,
//int nbOnDegen = 0;
for ( int i = 0; i < myEdge.size(); ++i ) {
// put 1st vertex node
TopoDS_Vertex VFirst, VLast;
TopExp::Vertices( myEdge[i], VFirst, VLast, true);
const SMDS_MeshNode* node = SMESH_Algo::VertexNode( VFirst, meshDS );
TopoDS_Vertex VV[2]; // TopExp::FirstVertex() returns NULL for INTERNAL edge
for ( TopoDS_Iterator vIt(myEdge[i]); vIt.More(); vIt.Next() )
VV[ VV[0].IsNull() ? 0 : 1 ] = TopoDS::Vertex(vIt.Value());
if ( VV[0].Orientation() == TopAbs_REVERSED ) std::swap ( VV[0], VV[1] );
const SMDS_MeshNode* node = SMESH_Algo::VertexNode( VV[0], meshDS );
double prevNormPar = ( i == 0 ? 0 : myNormPar[ i-1 ]); // normalized param
if ( node ) { // internal nodes may be missing
u2node.insert( make_pair( prevNormPar, node ));
@ -220,7 +228,7 @@ const vector<UVPtStruct>& StdMeshers_FaceSide::GetUVPtStruct(bool isXConst,
// put 2nd vertex node for a last edge
if ( i+1 == myEdge.size() ) {
node = SMESH_Algo::VertexNode( VLast, meshDS );
node = SMESH_Algo::VertexNode( VV[1], meshDS );
if ( !node ) {
MESSAGE(" NO NODE on VERTEX" );
return myPoints;
@ -527,20 +535,28 @@ TSideVector StdMeshers_FaceSide::GetFaceWires(const TopoDS_Face& theFace,
for ( int iW = 0; iW < nbWires; ++iW )
{
std::advance( to, *nbE++ );
if ( *nbE == 0 ) // Issue 0020676
{
--nbWires;
--iW;
wires.resize( nbWires );
continue;
}
list< TopoDS_Edge > wireEdges( from, to );
// assure that there is a node on the first vertex
// as StdMeshers_FaceSide::GetUVPtStruct() requires
while ( !SMESH_Algo::VertexNode( TopExp::FirstVertex( wireEdges.front(), true),
theMesh.GetMeshDS()))
{
wireEdges.splice(wireEdges.end(), wireEdges,
wireEdges.begin(), ++wireEdges.begin());
if ( from->IsSame( wireEdges.front() )) {
theError = TError
( new SMESH_ComputeError(COMPERR_BAD_INPUT_MESH,"No nodes on vertices"));
return TSideVector(0);
if ( wireEdges.front().Orientation() != TopAbs_INTERNAL ) // Issue 0020676
while ( !SMESH_Algo::VertexNode( TopExp::FirstVertex( wireEdges.front(), true),
theMesh.GetMeshDS()))
{
wireEdges.splice(wireEdges.end(), wireEdges,
wireEdges.begin(), ++wireEdges.begin());
if ( from->IsSame( wireEdges.front() )) {
theError = TError
( new SMESH_ComputeError(COMPERR_BAD_INPUT_MESH,"No nodes on vertices"));
return TSideVector(0);
}
}
}
const bool isForward = true;
StdMeshers_FaceSide* wire = new StdMeshers_FaceSide( theFace, wireEdges, &theMesh,
isForward, theIgnoreMediumNodes);
@ -550,3 +566,40 @@ TSideVector StdMeshers_FaceSide::GetFaceWires(const TopoDS_Face& theFace,
return wires;
}
//================================================================================
/*!
* \brief Return 1st vertex of the i-the edge
*/
//================================================================================
TopoDS_Vertex StdMeshers_FaceSide::FirstVertex(int i) const
{
return (i >= NbEdges()) ? (TopoDS_Vertex()) :
(
myEdge[i].Orientation() <= TopAbs_REVERSED ? // FORWARD || REVERSED
TopExp::FirstVertex( myEdge[i], 1 ) :
TopoDS::Vertex( TopoDS_Iterator( myEdge[i] ).Value())
);
}
//================================================================================
/*!
* \brief Return last vertex of the i-the edge
*/
//================================================================================
TopoDS_Vertex StdMeshers_FaceSide::LastVertex(int i) const
{
TopoDS_Vertex v;
if ( i < NbEdges() )
{
const TopoDS_Edge& edge = i<0 ? myEdge[ NbEdges() + i ] : myEdge[i];
if ( edge.Orientation() <= TopAbs_REVERSED ) // FORWARD || REVERSED
v = TopExp::LastVertex( edge, 1 );
else
for ( TopoDS_Iterator vIt( edge ); vIt.More(); vIt.Next() )
v = TopoDS::Vertex( vIt.Value() );
}
return v;
}

26
src/StdMeshers/StdMeshers_FaceSide.hxx
View File

@ -170,11 +170,11 @@ public:
/*!
* \brief Return 1st vertex of the i-the edge (count starts from zero)
*/
inline TopoDS_Vertex FirstVertex(int i=0) const;
TopoDS_Vertex FirstVertex(int i=0) const;
/*!
* \brief Return last vertex of the i-the edge (count starts from zero)
*/
inline TopoDS_Vertex LastVertex(int i=-1) const;
TopoDS_Vertex LastVertex(int i=-1) const;
/*!
* \brief Return first normalized parameter of the i-the edge (count starts from zero)
*/
@ -243,28 +243,6 @@ inline double StdMeshers_FaceSide::Parameter(double U, TopoDS_Edge & edge) const
return myFirst[i] * ( 1 - r ) + myLast[i] * r;
}
//================================================================================
/*!
* \brief Return 1st vertex of the i-the edge
*/
//================================================================================
inline TopoDS_Vertex StdMeshers_FaceSide::FirstVertex(int i) const
{
return i < myEdge.size() ? TopExp::FirstVertex( myEdge[i], 1 ) : TopoDS_Vertex();
}
//================================================================================
/*!
* \brief Return last vertex of the i-the edge
*/
//================================================================================
inline TopoDS_Vertex StdMeshers_FaceSide::LastVertex(int i) const
{
return i<0 ? TopExp::LastVertex( myEdge.back(), 1) : i<myEdge.size() ? TopExp::LastVertex( myEdge[i], 1 ) : TopoDS_Vertex();
}
//================================================================================
/*!
* \brief Return first normalized parameter of the i-the edge