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manually reverted commit d69e4fb6c7 to get good pyramides

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mbs 2024-10-15 09:43:07 +01:00
parent a1e2cdd1ed
commit 1b9b6aac15
2 changed files with 112 additions and 81 deletions
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179
src/StdMeshers/StdMeshers_QuadToTriaAdaptor.cxx
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@ -60,22 +60,22 @@ enum EQuadNature { NOT_QUAD, QUAD, DEGEN_QUAD, PYRAM_APEX = 4, TRIA_APEX = 0 };
// std-like iterator used to get coordinates of nodes of mesh element // std-like iterator used to get coordinates of nodes of mesh element
typedef SMDS_StdIterator< SMESH_TNodeXYZ, SMDS_ElemIteratorPtr > TXyzIterator; typedef SMDS_StdIterator< SMESH_TNodeXYZ, SMDS_ElemIteratorPtr > TXyzIterator;
//================================================================================ // //================================================================================
/*! // /*!
* \brief Return ID of pyramid base face, for debug // * \brief Return ID of pyramid base face, for debug
*/ // */
//================================================================================ // //================================================================================
//
int getFaceID(const SMDS_MeshElement* pyram) // int getFaceID(const SMDS_MeshElement* pyram)
{ // {
if ( pyram ) // if ( pyram )
if ( const SMDS_MeshElement* f = SMDS_Mesh::FindFace( pyram->GetNode(0), // if ( const SMDS_MeshElement* f = SMDS_Mesh::FindFace( pyram->GetNode(0),
pyram->GetNode(1), // pyram->GetNode(1),
pyram->GetNode(2), // pyram->GetNode(2),
pyram->GetNode(3))) // pyram->GetNode(3)))
return f->GetID(); // return f->GetID();
return -1; // return -1;
} // }
namespace namespace
{ {
@ -537,49 +537,49 @@ void StdMeshers_QuadToTriaAdaptor::MergeAdjacent(const SMDS_MeshElement* PrmI
*/ */
//================================================================================ //================================================================================
bool StdMeshers_QuadToTriaAdaptor::DecreaseHeightDifference( const SMDS_MeshElement* thePyram, // bool StdMeshers_QuadToTriaAdaptor::DecreaseHeightDifference( const SMDS_MeshElement* thePyram,
const double theH2 ) // const double theH2 )
{ // {
const double allowedFactor2 = 2. * 2.; // const double allowedFactor2 = 2. * 2.;
//
bool modif = false; // bool modif = false;
myNodes[0] = thePyram->GetNode( 3 ); // myNodes[0] = thePyram->GetNode( 3 );
for ( int i = 0; i < 4; ++i ) // for ( int i = 0; i < 4; ++i )
{ // {
myNodes[1] = thePyram->GetNode( i ); // myNodes[1] = thePyram->GetNode( i );
SMDS_Mesh::GetElementsByNodes( myNodes, myAdjPyrams, SMDSAbs_Volume ); // SMDS_Mesh::GetElementsByNodes( myNodes, myAdjPyrams, SMDSAbs_Volume );
myNodes[0] = myNodes[1]; // myNodes[0] = myNodes[1];
//
for ( const SMDS_MeshElement* pyramAdj : myAdjPyrams ) // for ( const SMDS_MeshElement* pyramAdj : myAdjPyrams )
{ // {
if ( pyramAdj == thePyram ) // if ( pyramAdj == thePyram )
continue; // continue;
if ( !myPyramHeight2.IsBound( pyramAdj )) // if ( !myPyramHeight2.IsBound( pyramAdj ))
continue; // continue;
double h2Adj = Abs( myPyramHeight2( pyramAdj )); // double h2Adj = Abs( myPyramHeight2( pyramAdj ));
double h2 = Abs( theH2 ); // double h2 = Abs( theH2 );
if ( h2Adj > h2 ) // if ( h2Adj > h2 )
{ // {
if ( h2 * allowedFactor2 < h2Adj ) // if ( h2 * allowedFactor2 < h2Adj )
{ // {
// bind negative value to allow finding pyramids whose height must change // // bind negative value to allow finding pyramids whose height must change
myPyramHeight2.Bind( pyramAdj, - h2 * allowedFactor2 ); // myPyramHeight2.Bind( pyramAdj, - h2 * allowedFactor2 );
modif = true; // modif = true;
} // }
} // }
else // else
{ // {
if ( h2Adj * allowedFactor2 < h2 ) // if ( h2Adj * allowedFactor2 < h2 )
{ // {
// bind negative value to allow finding pyramids whose height must change // // bind negative value to allow finding pyramids whose height must change
myPyramHeight2.Bind( thePyram, - h2Adj * allowedFactor2 ); // myPyramHeight2.Bind( thePyram, - h2Adj * allowedFactor2 );
modif = true; // modif = true;
} // }
} // }
} // }
} // }
return modif; // return modif;
} // }
//================================================================================ //================================================================================
@ -614,11 +614,11 @@ StdMeshers_QuadToTriaAdaptor::~StdMeshers_QuadToTriaAdaptor()
//======================================================================= //=======================================================================
static gp_Pnt FindBestPoint(const gp_Pnt& P1, const gp_Pnt& P2, static gp_Pnt FindBestPoint(const gp_Pnt& P1, const gp_Pnt& P2,
const gp_Pnt& PC, const gp_Vec& V, const gp_Pnt& PC, const gp_Vec& V/*,
double & shift) double & shift*/)
{ {
gp_Pnt Pbest = PC; gp_Pnt Pbest = PC;
shift = 0; //shift = 0;
const double a2 = P1.SquareDistance(P2); const double a2 = P1.SquareDistance(P2);
const double b2 = P1.SquareDistance(PC); const double b2 = P1.SquareDistance(PC);
const double c2 = P2.SquareDistance(PC); const double c2 = P2.SquareDistance(PC);
@ -629,7 +629,7 @@ static gp_Pnt FindBestPoint(const gp_Pnt& P1, const gp_Pnt& P2,
const double Vsize = V.Magnitude(); const double Vsize = V.Magnitude();
if ( fabs( Vsize ) > std::numeric_limits<double>::min() ) if ( fabs( Vsize ) > std::numeric_limits<double>::min() )
{ {
shift = sqrt( a2 + (b2-c2)*(b2-c2)/16/a2 - (b2+c2)/2 ); const double shift = sqrt( a2 + (b2-c2)*(b2-c2)/16/a2 - (b2+c2)/2 );
Pbest.ChangeCoord() += shift * V.XYZ() / Vsize; Pbest.ChangeCoord() += shift * V.XYZ() / Vsize;
} }
} }
@ -1103,6 +1103,7 @@ bool StdMeshers_QuadToTriaAdaptor::Compute(SMESH_Mesh& aMesh,
case QUAD: case QUAD:
{ {
if(!isRev) VNorm.Reverse(); if(!isRev) VNorm.Reverse();
#if 0
//double xc = 0., yc = 0., zc = 0.; //double xc = 0., yc = 0., zc = 0.;
double h, hMin = Precision::Infinite(); double h, hMin = Precision::Infinite();
gp_Pnt PCbest = PC; gp_Pnt PCbest = PC;
@ -1120,6 +1121,21 @@ bool StdMeshers_QuadToTriaAdaptor::Compute(SMESH_Mesh& aMesh,
} }
} }
//gp_Pnt PCbest(xc/4., yc/4., zc/4.); //gp_Pnt PCbest(xc/4., yc/4., zc/4.);
#else
double xc = 0., yc = 0., zc = 0.;
int i = 1;
for(; i<=4; i++) {
gp_Pnt Pbest;
if(!isRev)
Pbest = FindBestPoint(PN(i), PN(i+1), PC, VN(i).Reversed());
else
Pbest = FindBestPoint(PN(i), PN(i+1), PC, VN(i));
xc += Pbest.X();
yc += Pbest.Y();
zc += Pbest.Z();
}
gp_Pnt PCbest(xc/4., yc/4., zc/4.);
#endif
// check PCbest // check PCbest
double height = PCbest.Distance(PC); double height = PCbest.Distance(PC);
@ -1145,7 +1161,7 @@ bool StdMeshers_QuadToTriaAdaptor::Compute(SMESH_Mesh& aMesh,
myPyramids.push_back(aPyram); myPyramids.push_back(aPyram);
//cout << "F" << face->GetID() << " - V" << aPyram->GetID() << endl; //cout << "F" << face->GetID() << " - V" << aPyram->GetID() << endl;
myPyramHeight2.Bind( aPyram, PCbest.SquareDistance( PC )); // myPyramHeight2.Bind( aPyram, PCbest.SquareDistance( PC ));
// add triangles to result map // add triangles to result map
helper->SetElementsOnShape( false ); helper->SetElementsOnShape( false );
@ -1354,7 +1370,7 @@ bool StdMeshers_QuadToTriaAdaptor::Compute(SMESH_Mesh& aMesh)
// ----------------------------------- // -----------------------------------
// Find pyramid peak // Find pyramid peak
#if 0
gp_XYZ PCbest = PC.XYZ();//(0., 0., 0.); // pyramid peak gp_XYZ PCbest = PC.XYZ();//(0., 0., 0.); // pyramid peak
double h, hMin = Precision::Infinite(); double h, hMin = Precision::Infinite();
int i = 1; int i = 1;
@ -1368,6 +1384,15 @@ bool StdMeshers_QuadToTriaAdaptor::Compute(SMESH_Mesh& aMesh)
//PCbest += Pbest.XYZ(); //PCbest += Pbest.XYZ();
} }
//PCbest /= 4; //PCbest /= 4;
#else
gp_XYZ PCbest(0., 0., 0.); // pyramid peak
int i = 1;
for ( ; i <= 4; i++ ) {
gp_Pnt Pbest = FindBestPoint(PN(i), PN(i+1), PC, VN(i));
PCbest += Pbest.XYZ();
}
PCbest /= 4;
#endif
double height = PC.Distance(PCbest); // pyramid height to precise double height = PC.Distance(PCbest); // pyramid height to precise
if ( height < 1.e-6 ) { if ( height < 1.e-6 ) {
@ -1525,12 +1550,13 @@ bool StdMeshers_QuadToTriaAdaptor::Compute2ndPart(SMESH_Mesh&
// check adjacent pyramids // check adjacent pyramids
// for ( i = 0; i < myPyramids.size(); ++i ) #if 1
// { for ( i = 0; i < myPyramids.size(); ++i )
// const SMDS_MeshElement* PrmI = myPyramids[i]; {
// MergeAdjacent( PrmI, nodesToMove ); const SMDS_MeshElement* PrmI = myPyramids[i];
// } MergeAdjacent( PrmI, nodesToMove );
}
#else
// Fix adjacent pyramids whose heights differ too much // Fix adjacent pyramids whose heights differ too much
myNodes.resize(2); myNodes.resize(2);
@ -1557,6 +1583,7 @@ bool StdMeshers_QuadToTriaAdaptor::Compute2ndPart(SMESH_Mesh&
gp_Pnt newApex = gp_Pnt( PC ).Translated( h * V.Normalized() ); gp_Pnt newApex = gp_Pnt( PC ).Translated( h * V.Normalized() );
meshDS->MoveNode( Papex.Node(), newApex.X(), newApex.Y(), newApex.Z() ); meshDS->MoveNode( Papex.Node(), newApex.X(), newApex.Y(), newApex.Z() );
} }
#endif
// iterate on all new pyramids // iterate on all new pyramids
vector< const SMDS_MeshElement* > suspectPyrams; vector< const SMDS_MeshElement* > suspectPyrams;
@ -1644,7 +1671,7 @@ bool StdMeshers_QuadToTriaAdaptor::Compute2ndPart(SMESH_Mesh&
if ( nbc == 4 ) if ( nbc == 4 )
continue; // pyrams have a common base face continue; // pyrams have a common base face
if ( nbc > 1 ) if (nbc > 0) //( nbc > 1 )
{ {
// Merge the two pyramids and others already merged with them // Merge the two pyramids and others already merged with them
MergePiramids( PrmI, PrmJ, nodesToMove ); MergePiramids( PrmI, PrmJ, nodesToMove );
@ -1680,9 +1707,11 @@ bool StdMeshers_QuadToTriaAdaptor::Compute2ndPart(SMESH_Mesh&
nodesToMove.insert( aNode2 ); nodesToMove.insert( aNode2 );
//cout << "Limit H F" << getFaceID( PrmI ) << " - F" << getFaceID( PrmJ ) << endl; //cout << "Limit H F" << getFaceID( PrmI ) << " - F" << getFaceID( PrmJ ) << endl;
} }
#if 1
// fix intersections that can appear after apex movement // fix intersections that can appear after apex movement
//MergeAdjacent( PrmI, nodesToMove ); MergeAdjacent( PrmI, nodesToMove );
//MergeAdjacent( PrmJ, nodesToMove ); MergeAdjacent( PrmJ, nodesToMove );
#endif
apexI = PrmI->GetNode( PYRAM_APEX ); // apexI can be removed by merge apexI = PrmI->GetNode( PYRAM_APEX ); // apexI can be removed by merge
@ -1692,12 +1721,14 @@ bool StdMeshers_QuadToTriaAdaptor::Compute2ndPart(SMESH_Mesh&
} // loop on all pyramids } // loop on all pyramids
#if 0
//smIdType nbNodes = aMesh.NbNodes(); //smIdType nbNodes = aMesh.NbNodes();
for ( i = 0; i < myPyramids.size(); ++i ) for ( i = 0; i < myPyramids.size(); ++i )
{ {
const SMDS_MeshElement* PrmI = myPyramids[i]; const SMDS_MeshElement* PrmI = myPyramids[i];
MergeAdjacent( PrmI, nodesToMove ); MergeAdjacent( PrmI, nodesToMove );
} }
#endif
if( !nodesToMove.empty() && !meshDS->IsEmbeddedMode() ) if( !nodesToMove.empty() && !meshDS->IsEmbeddedMode() )
{ {

14
src/StdMeshers/StdMeshers_QuadToTriaAdaptor.hxx
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@ -44,7 +44,7 @@ class gp_Vec;
#include <vector> #include <vector>
#include <TopoDS_Shape.hxx> #include <TopoDS_Shape.hxx>
#include <NCollection_DataMap.hxx> //#include <NCollection_DataMap.hxx>
/*! /*!
* \brief "Transforms" quadrilateral faces into triangular ones by creation of pyramids * \brief "Transforms" quadrilateral faces into triangular ones by creation of pyramids
@ -94,19 +94,19 @@ protected:
std::set<const SMDS_MeshNode*>& nodesToMove, std::set<const SMDS_MeshNode*>& nodesToMove,
const bool isRecursion = false); const bool isRecursion = false);
bool DecreaseHeightDifference( const SMDS_MeshElement* pyram, // bool DecreaseHeightDifference( const SMDS_MeshElement* pyram,
const double h2 ); // const double h2 );
TopoDS_Shape myShape; TopoDS_Shape myShape;
std::set<const SMDS_MeshElement*> myRemovedTrias; std::set<const SMDS_MeshElement*> myRemovedTrias;
std::list< const SMDS_MeshNode* > myDegNodes; std::list< const SMDS_MeshNode* > myDegNodes;
const SMESH_ElementSearcher* myElemSearcher; const SMESH_ElementSearcher* myElemSearcher;
NCollection_DataMap< const SMDS_MeshElement*, double > myPyramHeight2; // NCollection_DataMap< const SMDS_MeshElement*, double > myPyramHeight2;
// work buffers of DecreaseHeightDifference() // // work buffers of DecreaseHeightDifference()
std::vector< const SMDS_MeshElement* > myAdjPyrams; // std::vector< const SMDS_MeshElement* > myAdjPyrams;
std::vector<const SMDS_MeshNode *> myNodes; // std::vector<const SMDS_MeshNode *> myNodes;
}; };
#endif #endif