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Regress of 3D_mesh_NETGEN/G6 test

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* avoid pb that for internal node GCPnts_AbscissaPoint::Length() return value larger than total edge length
   * cash values used for work with non-uniformly paramtrized edges
This commit is contained in:
eap 2010-04-22 13:32:59 +00:00
parent 69157b62ee
commit 7f18f75436
2 changed files with 50 additions and 60 deletions
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102
src/StdMeshers/StdMeshers_FaceSide.cxx
View File

@ -92,9 +92,12 @@ StdMeshers_FaceSide::StdMeshers_FaceSide(const TopoDS_Face& theFace,
int nbEdges = theEdges.size();
myEdge.resize( nbEdges );
myC2d.resize( nbEdges );
myC3dAdaptor.resize( nbEdges );
myFirst.resize( nbEdges );
myLast.resize( nbEdges );
myNormPar.resize( nbEdges );
myEdgeLength.resize( nbEdges );
myIsUniform.resize( nbEdges );
myLength = 0;
myNbPonits = myNbSegments = 0;
myMesh = theMesh;
@ -104,7 +107,6 @@ StdMeshers_FaceSide::StdMeshers_FaceSide(const TopoDS_Face& theFace,
if ( nbEdges == 0 ) return;
SMESHDS_Mesh* meshDS = theMesh->GetMeshDS();
vector<double> len( nbEdges );
int nbDegen = 0;
list<TopoDS_Edge>::iterator edge = theEdges.begin();
@ -112,9 +114,9 @@ StdMeshers_FaceSide::StdMeshers_FaceSide(const TopoDS_Face& theFace,
for ( int index = 0; edge != theEdges.end(); ++index, ++edge )
{
int i = theIsForward ? index : nbEdges - index - 1;
len[i] = SMESH_Algo::EdgeLength( *edge );
if ( len[i] < DBL_MIN ) nbDegen++;
myLength += len[i];
myEdgeLength[i] = SMESH_Algo::EdgeLength( *edge );
if ( myEdgeLength[i] < DBL_MIN ) nbDegen++;
myLength += myEdgeLength[i];
myEdge[i] = *edge;
if ( !theIsForward ) myEdge[i].Reverse();
@ -142,6 +144,24 @@ StdMeshers_FaceSide::StdMeshers_FaceSide(const TopoDS_Face& theFace,
myNbPonits += 1; // for the first end
else
myMissingVertexNodes = true;
// check if edge has non-uniform parametrization (issue 0020705)
if ( !myC2d[i].IsNull() )
{
Geom2dAdaptor_Curve A2dC( myC2d[i] );
double p2 = myFirst[i]+(myLast[i]-myFirst[i])/2., p4 = myFirst[i]+(myLast[i]-myFirst[i])/4.;
double d2 = GCPnts_AbscissaPoint::Length( A2dC, myFirst[i], p2 );
double d4 = GCPnts_AbscissaPoint::Length( A2dC, myFirst[i], p4 );
//cout<<"len = "<<len<<" d2 = "<<d2<<" fabs(2*d2/len-1.0) = "<<fabs(2*d2/len-1.0)<<endl;
myIsUniform[i] = !( fabs(2*d2/myEdgeLength[i]-1.0) > 0.01 || fabs(2*d4/d2-1.0) > 0.01 );
if ( !myIsUniform[i] )
{
double fp,lp;
TopLoc_Location L;
Handle(Geom_Curve) C3d = BRep_Tool::Curve(myEdge[i],L,fp,lp);
myC3dAdaptor[i].Load( C3d, fp,lp );
}
}
}
vExp.Initialize( theEdges.back() );
if ( vExp.Value().Orientation() != TopAbs_REVERSED ) vExp.Next();
@ -159,9 +179,9 @@ StdMeshers_FaceSide::StdMeshers_FaceSide(const TopoDS_Face& theFace,
totLength += myLength * degenNormLen * nbDegen;
double prevNormPar = 0;
for ( int i = 0; i < nbEdges; ++i ) {
if ( len[ i ] < DBL_MIN )
len[ i ] = myLength * degenNormLen;
myNormPar[ i ] = prevNormPar + len[i]/totLength;
if ( myEdgeLength[ i ] < DBL_MIN )
myEdgeLength[ i ] = myLength * degenNormLen;
myNormPar[ i ] = prevNormPar + myEdgeLength[i]/totLength;
prevNormPar = myNormPar[ i ];
}
}
@ -197,28 +217,6 @@ StdMeshers_FaceSide::StdMeshers_FaceSide(const SMDS_MeshNode* theNode,
}
}
//=======================================================================
//function : IsUniform
//purpose : auxilary function
//=======================================================================
bool IsUniform(const Handle(Geom2d_Curve)& C2d, double fp, double lp)
{
//cout<<"IsUniform fp = "<<fp<<" lp = "<<lp<<endl;
if(C2d.IsNull())
return true;
Geom2dAdaptor_Curve A2dC(C2d);
double d1 = GCPnts_AbscissaPoint::Length( A2dC, fp, lp );
double d2 = GCPnts_AbscissaPoint::Length( A2dC, fp, fp+(lp-fp)/2. );
double d4 = GCPnts_AbscissaPoint::Length( A2dC, fp, fp+(lp-fp)/4. );
//cout<<"d1 = "<<d1<<" d2 = "<<d2<<" fabs(2*d2/d1-1.0) = "<<fabs(2*d2/d1-1.0)<<endl;
if( fabs(2*d2/d1-1.0) > 0.01 || fabs(2*d4/d2-1.0) > 0.01 )
return false;
return true;
}
//================================================================================
/*!
* \brief Return info on nodes on the side
@ -234,6 +232,8 @@ const vector<UVPtStruct>& StdMeshers_FaceSide::GetUVPtStruct(bool isXConst,
if ( NbEdges() == 0 ) return myPoints;
SMESHDS_Mesh* meshDS = myMesh->GetMeshDS();
SMESH_MesherHelper helper(*myMesh);
bool paramOK;
// sort nodes of all edges putting them into a map
@ -265,32 +265,27 @@ const vector<UVPtStruct>& StdMeshers_FaceSide::GetUVPtStruct(bool isXConst,
u2node.insert( make_pair( 1., node ));
}
bool IsUni = IsUniform( myC2d[i], myFirst[i], myLast[i] );
// put internal nodes
SMESHDS_SubMesh* sm = meshDS->MeshElements( myEdge[i] );
if ( !sm ) continue;
SMDS_NodeIteratorPtr nItr = sm->GetNodes();
double paramSize = myLast[i] - myFirst[i];
double r = myNormPar[i] - prevNormPar;
while ( nItr->more() ) {
while ( nItr->more() )
{
const SMDS_MeshNode* node = nItr->next();
if ( myIgnoreMediumNodes && SMESH_MeshEditor::IsMedium( node, SMDSAbs_Edge ))
continue;
const SMDS_EdgePosition* epos =
static_cast<const SMDS_EdgePosition*>(node->GetPosition().get());
double u = epos->GetUParameter();
// paramSize is signed so orientation is taken into account
double u = helper.GetNodeU( myEdge[i], node, &paramOK );
// paramSize is signed so orientation is taken into account
double normPar = prevNormPar + r * ( u - myFirst[i] ) / paramSize;
if(!IsUni) {
double fp,lp;
TopLoc_Location L;
Handle(Geom_Curve) C3d = BRep_Tool::Curve(myEdge[i],L,fp,lp);
GeomAdaptor_Curve A3dC( C3d );
double aLen = GCPnts_AbscissaPoint::Length( A3dC, myFirst[i], myLast[i] );
double aLenU = GCPnts_AbscissaPoint::Length( A3dC, myFirst[i], u );
normPar = prevNormPar + r*aLenU/aLen;
if(!myIsUniform[i])
{
double aLenU = GCPnts_AbscissaPoint::Length
( const_cast<GeomAdaptor_Curve&>( myC3dAdaptor[i]), myFirst[i], u );
if ( myEdgeLength[i] > aLenU ) // nonregression test "3D_mesh_NETGEN/G6"
normPar = prevNormPar + r*aLenU/myEdgeLength[i];
}
#ifdef _DEBUG_
if ( normPar > 1 || normPar < 0) {
@ -552,19 +547,11 @@ gp_Pnt2d StdMeshers_FaceSide::Value2d(double U) const
double par = myFirst[i] * ( 1 - r ) + myLast[i] * r;
// check parametrization of curve
if( !IsUniform( myC2d[i], myFirst[i], myLast[i] ) ) {
double fp,lp;
TopLoc_Location L;
Handle(Geom_Curve) C3d = BRep_Tool::Curve(myEdge[i],L,fp,lp);
fp = myFirst[i];
lp = myLast[i];
GeomAdaptor_Curve A3dC( C3d );
double aLen3d = GCPnts_AbscissaPoint::Length( A3dC, fp, lp );
double aLen3dU = aLen3d*r;
if(fp>lp) {
aLen3dU = -aLen3dU;
}
GCPnts_AbscissaPoint AbPnt( A3dC, aLen3dU, fp );
if( !myIsUniform[i] )
{
double aLen3dU = r * myEdgeLength[i] * ( myFirst[i]>myLast[i] ? -1. : 1.);
GCPnts_AbscissaPoint AbPnt
( const_cast<GeomAdaptor_Curve&>( myC3dAdaptor[i]), aLen3dU, myFirst[i] );
if( AbPnt.IsDone() ) {
par = AbPnt.Parameter();
}
@ -572,7 +559,6 @@ gp_Pnt2d StdMeshers_FaceSide::Value2d(double U) const
return myC2d[ i ]->Value(par);
}
//return gp_Pnt2d( 1e+100, 1e+100 );
return myDefaultPnt2d;
}

8
src/StdMeshers/StdMeshers_FaceSide.hxx
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@ -29,10 +29,11 @@
#ifndef StdMeshers_FaceSide_HeaderFile
#define StdMeshers_FaceSide_HeaderFile
#include <gp_Pnt2d.hxx>
#include <Geom2d_Curve.hxx>
#include <GeomAdaptor_Curve.hxx>
#include <TopoDS_Edge.hxx>
#include <TopoDS_Vertex.hxx>
#include <Geom2d_Curve.hxx>
#include <gp_Pnt2d.hxx>
#include "SMESH_StdMeshers.hxx"
@ -200,8 +201,11 @@ protected:
std::vector<uvPtStruct> myPoints, myFalsePoints;
std::vector<TopoDS_Edge> myEdge;
std::vector<Handle(Geom2d_Curve)> myC2d;
std::vector<GeomAdaptor_Curve> myC3dAdaptor;
std::vector<double> myFirst, myLast;
std::vector<double> myNormPar;
std::vector<double> myEdgeLength;
std::vector<double> myIsUniform;
double myLength;
int myNbPonits, myNbSegments;
SMESH_Mesh* myMesh;