// See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
//
-// SMESH SMESH : implementaion of SMESH idl descriptions
// File : StdMeshers_QuadToTriaAdaptor.cxx
// Module : SMESH
// Created : Wen May 07 16:37:07 2008
using namespace std;
-enum EQuadNature { NOT_QUAD, QUAD, DEGEN_QUAD };
+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
-typedef SMDS_StdIterator< SMESH_MeshEditor::TNodeXYZ, SMDS_ElemIteratorPtr > TXyzIterator;
+typedef SMDS_StdIterator< SMESH_TNodeXYZ, SMDS_ElemIteratorPtr > TXyzIterator;
namespace
{
- const int Q2TAbs_TmpTriangle = SMDSEntity_Last + 1;
-
- //================================================================================
- /*!
- * \brief Temporary face. It's key feature is that it adds itself to an apex node
- * as inverse element, so that tmp triangles of a piramid can be easily found
- */
- //================================================================================
-
- class STDMESHERS_EXPORT Q2TAdaptor_Triangle : public SMDS_MeshFace
- {
- const SMDS_MeshNode* _nodes[3];
- public:
- Q2TAdaptor_Triangle(const SMDS_MeshNode* apexNode,
- const SMDS_MeshNode* node2,
- const SMDS_MeshNode* node3)
- {
- _nodes[0]=0; ChangeApex(apexNode);
- _nodes[1]=node2;
- _nodes[2]=node3;
- }
- ~Q2TAdaptor_Triangle() { MarkAsRemoved(); }
- void ChangeApex(const SMDS_MeshNode* node)
- {
- MarkAsRemoved();
- _nodes[0]=node;
- const_cast<SMDS_MeshNode*>(node)->AddInverseElement(this);
- }
- void MarkAsRemoved()
- {
- if ( _nodes[0] )
- const_cast<SMDS_MeshNode*>(_nodes[0])->RemoveInverseElement(this), _nodes[0] = 0;
- }
- bool IsRemoved() const { return !_nodes[0]; }
- virtual int NbNodes() const { return 3; }
- virtual const SMDS_MeshNode* GetNode(const int ind) const { return _nodes[ind]; }
- virtual SMDSAbs_EntityType GetEntityType() const
- {
- return SMDSAbs_EntityType( Q2TAbs_TmpTriangle );
- }
- virtual SMDS_ElemIteratorPtr elementsIterator(SMDSAbs_ElementType type) const
- {
- if ( type == SMDSAbs_Node )
- return SMDS_ElemIteratorPtr( new SMDS_NodeArrayElemIterator( _nodes, _nodes+3 ));
- throw SALOME_Exception(LOCALIZED("Not implemented"));
- }
- };
-
//================================================================================
/*!
* \brief Return true if two nodes of triangles are equal
( F1->GetNode(1)==F2->GetNode(2) && F1->GetNode(2)==F2->GetNode(1) ) ||
( F1->GetNode(1)==F2->GetNode(1) && F1->GetNode(2)==F2->GetNode(2) );
}
-
- //================================================================================
- /*!
- * \brief Merge the two pyramids (i.e. fuse their apex) and others already merged with them
- */
- //================================================================================
-
- void MergePiramids( const SMDS_MeshElement* PrmI,
- const SMDS_MeshElement* PrmJ,
- SMESHDS_Mesh* meshDS,
- set<const SMDS_MeshNode*> & nodesToMove)
- {
- const SMDS_MeshNode* Nrem = PrmJ->GetNode(4); // node to remove
- int nbJ = Nrem->NbInverseElements( SMDSAbs_Volume );
- SMESH_MeshEditor::TNodeXYZ Pj( Nrem );
-
- // an apex node to make common to all merged pyramids
- SMDS_MeshNode* CommonNode = const_cast<SMDS_MeshNode*>(PrmI->GetNode(4));
- if ( CommonNode == Nrem ) return; // already merged
- int nbI = CommonNode->NbInverseElements( SMDSAbs_Volume );
- SMESH_MeshEditor::TNodeXYZ Pi( CommonNode );
- gp_XYZ Pnew = ( nbI*Pi + nbJ*Pj ) / (nbI+nbJ);
- CommonNode->setXYZ( Pnew.X(), Pnew.Y(), Pnew.Z() );
-
- nodesToMove.insert( CommonNode );
- nodesToMove.erase ( Nrem );
-
- // find and remove coincided faces of merged pyramids
- SMDS_ElemIteratorPtr triItI = CommonNode->GetInverseElementIterator(SMDSAbs_Face);
- while ( triItI->more() )
- {
- const SMDS_MeshElement* FI = triItI->next();
- const SMDS_MeshElement* FJEqual = 0;
- SMDS_ElemIteratorPtr triItJ = Nrem->GetInverseElementIterator(SMDSAbs_Face);
- while ( !FJEqual && triItJ->more() )
- {
- const SMDS_MeshElement* FJ = triItJ->next();
- if ( EqualTriangles( FJ, FI ))
- FJEqual = FJ;
- }
- if ( FJEqual )
- {
- ((Q2TAdaptor_Triangle*) FI)->MarkAsRemoved();
- ((Q2TAdaptor_Triangle*) FJEqual)->MarkAsRemoved();
- }
- }
-
- // set the common apex node to pyramids and triangles merged with J
- SMDS_ElemIteratorPtr itJ = Nrem->GetInverseElementIterator();
- while ( itJ->more() )
- {
- const SMDS_MeshElement* elem = itJ->next();
- if ( elem->GetType() == SMDSAbs_Volume ) // pyramid
- {
- vector< const SMDS_MeshNode* > nodes( elem->begin_nodes(), elem->end_nodes() );
- nodes[4] = CommonNode;
- meshDS->ChangeElementNodes( elem, &nodes[0], nodes.size());
- }
- else if ( elem->GetEntityType() == Q2TAbs_TmpTriangle ) // tmp triangle
- {
- ((Q2TAdaptor_Triangle*) elem )->ChangeApex( CommonNode );
- }
- }
- ASSERT( Nrem->NbInverseElements() == 0 );
- meshDS->RemoveFreeNode( Nrem,
- meshDS->MeshElements( Nrem->GetPosition()->GetShapeId()),
- /*fromGroups=*/false);
- }
-
//================================================================================
/*!
* \brief Return true if two adjacent pyramids are too close one to another
const SMDS_MeshNode* nApexI = PrmI->GetNode(4);
const SMDS_MeshNode* nApexJ = PrmJ->GetNode(4);
if ( nApexI == nApexJ ||
- nApexI->GetPosition()->GetShapeId() != nApexJ->GetPosition()->GetShapeId() )
+ nApexI->getshapeId() != nApexJ->getshapeId() )
return false;
// Find two common base nodes and their indices within PrmI and PrmJ
int ind = baseNodes[0] ? 1:0;
if ( baseNodes[ ind ])
return false; // pyramids with a common base face
- baseNodes [ ind ] = PrmI->GetNode(i);
+ baseNodes [ ind ] = PrmI->GetNode(i);
baseNodesIndI[ ind ] = i;
baseNodesIndJ[ ind ] = j;
}
if ( !baseNodes[1] ) return false; // not adjacent
// Get normals of triangles sharing baseNodes
- gp_XYZ apexI = SMESH_MeshEditor::TNodeXYZ( nApexI );
- gp_XYZ apexJ = SMESH_MeshEditor::TNodeXYZ( nApexJ );
- gp_XYZ base1 = SMESH_MeshEditor::TNodeXYZ( baseNodes[0]);
- gp_XYZ base2 = SMESH_MeshEditor::TNodeXYZ( baseNodes[1]);
+ gp_XYZ apexI = SMESH_TNodeXYZ( nApexI );
+ gp_XYZ apexJ = SMESH_TNodeXYZ( nApexJ );
+ gp_XYZ base1 = SMESH_TNodeXYZ( baseNodes[0]);
+ gp_XYZ base2 = SMESH_TNodeXYZ( baseNodes[1]);
gp_Vec baseVec( base1, base2 );
gp_Vec baI( base1, apexI );
gp_Vec baJ( base1, apexJ );
bool tooClose = ( angle < 15 * PI180 );
// Check if pyramids collide
- bool isOutI, isOutJ;
if ( !tooClose && baI * baJ > 0 )
{
// find out if nI points outside of PrmI or inside
int dInd = baseNodesIndI[1] - baseNodesIndI[0];
- isOutI = ( abs(dInd)==1 ) ? dInd < 0 : dInd > 0;
+ bool isOutI = ( abs(dInd)==1 ) ? dInd < 0 : dInd > 0;
// find out sign of projection of nJ to baI
double proj = baI * nJ;
if ( tooClose && !hasShape )
{
// check order of baseNodes within pyramids, it must be opposite
- int dInd = baseNodesIndJ[1] - baseNodesIndJ[0];
- isOutJ = ( abs(dInd)==1 ) ? dInd < 0 : dInd > 0;
+ int dInd;
+ dInd = baseNodesIndI[1] - baseNodesIndI[0];
+ bool isOutI = ( abs(dInd)==1 ) ? dInd < 0 : dInd > 0;
+ dInd = baseNodesIndJ[1] - baseNodesIndJ[0];
+ bool isOutJ = ( abs(dInd)==1 ) ? dInd < 0 : dInd > 0;
if ( isOutJ == isOutI )
return false; // other domain
+ // direct both normals outside pyramid
+ ( isOutI ? nJ : nI ).Reverse();
+
// check absence of a face separating domains between pyramids
TIDSortedElemSet emptySet, avoidSet;
int i1, i2;
while ( otherNodeInd == i1 || otherNodeInd == i2 ) otherNodeInd++;
const SMDS_MeshNode* otherFaceNode = f->GetNode( otherNodeInd );
+ if ( otherFaceNode == nApexI || otherFaceNode == nApexJ )
+ continue; // f is a temporary triangle
+
// check if f is a base face of either of pyramids
if ( f->NbCornerNodes() == 4 &&
( PrmI->GetNodeIndex( otherFaceNode ) >= 0 ||
continue; // f is a base quadrangle
// check projections of face direction (baOFN) to triange normals (nI and nJ)
- gp_Vec baOFN( base1, SMESH_MeshEditor::TNodeXYZ( otherFaceNode ));
- ( isOutI ? nJ : nI ).Reverse();
+ gp_Vec baOFN( base1, SMESH_TNodeXYZ( otherFaceNode ));
if ( nI * baOFN > 0 && nJ * baOFN > 0 )
{
tooClose = false; // f is between pyramids
return tooClose;
}
+}
- //================================================================================
- /*!
- * \brief Merges adjacent pyramids
- */
- //================================================================================
+//================================================================================
+/*!
+ * \brief Merge the two pyramids (i.e. fuse their apex) and others already merged with them
+ */
+//================================================================================
- void MergeAdjacent(const SMDS_MeshElement* PrmI,
- SMESH_Mesh& mesh,
- set<const SMDS_MeshNode*>& nodesToMove)
+void StdMeshers_QuadToTriaAdaptor::MergePiramids( const SMDS_MeshElement* PrmI,
+ const SMDS_MeshElement* PrmJ,
+ set<const SMDS_MeshNode*> & nodesToMove)
+{
+ const SMDS_MeshNode* Nrem = PrmJ->GetNode(4); // node to remove
+ //int nbJ = Nrem->NbInverseElements( SMDSAbs_Volume );
+ SMESH_TNodeXYZ Pj( Nrem );
+
+ // an apex node to make common to all merged pyramids
+ SMDS_MeshNode* CommonNode = const_cast<SMDS_MeshNode*>(PrmI->GetNode(4));
+ if ( CommonNode == Nrem ) return; // already merged
+ //int nbI = CommonNode->NbInverseElements( SMDSAbs_Volume );
+ SMESH_TNodeXYZ Pi( CommonNode );
+ gp_XYZ Pnew = /*( nbI*Pi + nbJ*Pj ) / (nbI+nbJ);*/ 0.5 * ( Pi + Pj );
+ CommonNode->setXYZ( Pnew.X(), Pnew.Y(), Pnew.Z() );
+
+ nodesToMove.insert( CommonNode );
+ nodesToMove.erase ( Nrem );
+
+ typedef SMDS_StdIterator< const SMDS_MeshElement*, SMDS_ElemIteratorPtr > TStdElemIterator;
+ TStdElemIterator itEnd;
+
+ // find and remove coincided faces of merged pyramids
+ vector< const SMDS_MeshElement* > inverseElems
+ // copy inverse elements to avoid iteration on changing container
+ ( TStdElemIterator( CommonNode->GetInverseElementIterator(SMDSAbs_Face)), itEnd);
+ for ( unsigned i = 0; i < inverseElems.size(); ++i )
{
- TIDSortedElemSet adjacentPyrams, mergedPyrams;
- for(int k=0; k<4; k++) // loop on 4 base nodes of PrmI
+ const SMDS_MeshElement* FI = inverseElems[i];
+ const SMDS_MeshElement* FJEqual = 0;
+ SMDS_ElemIteratorPtr triItJ = Nrem->GetInverseElementIterator(SMDSAbs_Face);
+ while ( !FJEqual && triItJ->more() )
{
- const SMDS_MeshNode* n = PrmI->GetNode(k);
- SMDS_ElemIteratorPtr vIt = n->GetInverseElementIterator( SMDSAbs_Volume );
- while ( vIt->more() )
- {
- const SMDS_MeshElement* PrmJ = vIt->next();
- if ( PrmJ->NbCornerNodes() != 5 || !adjacentPyrams.insert( PrmJ ).second )
- continue;
- if ( PrmI != PrmJ && TooCloseAdjacent( PrmI, PrmJ, mesh.HasShapeToMesh() ))
- {
- MergePiramids( PrmI, PrmJ, mesh.GetMeshDS(), nodesToMove );
- mergedPyrams.insert( PrmJ );
- }
- }
+ const SMDS_MeshElement* FJ = triItJ->next();
+ if ( EqualTriangles( FJ, FI ))
+ FJEqual = FJ;
}
- if ( !mergedPyrams.empty() )
+ if ( FJEqual )
{
- TIDSortedElemSet::iterator prm;
-// for (prm = mergedPyrams.begin(); prm != mergedPyrams.end(); ++prm)
-// MergeAdjacent( *prm, mesh, nodesToMove );
+ removeTmpElement( FI );
+ removeTmpElement( FJEqual );
+ myRemovedTrias.insert( FI );
+ myRemovedTrias.insert( FJEqual );
+ }
+ }
+
+ // set the common apex node to pyramids and triangles merged with J
+ inverseElems.assign( TStdElemIterator( Nrem->GetInverseElementIterator()), itEnd );
+ for ( unsigned i = 0; i < inverseElems.size(); ++i )
+ {
+ const SMDS_MeshElement* elem = inverseElems[i];
+ vector< const SMDS_MeshNode* > nodes( elem->begin_nodes(), elem->end_nodes() );
+ nodes[ elem->GetType() == SMDSAbs_Volume ? PYRAM_APEX : TRIA_APEX ] = CommonNode;
+ GetMeshDS()->ChangeElementNodes( elem, &nodes[0], nodes.size());
+ }
+ ASSERT( Nrem->NbInverseElements() == 0 );
+ GetMeshDS()->RemoveFreeNode( Nrem,
+ GetMeshDS()->MeshElements( Nrem->getshapeId()),
+ /*fromGroups=*/false);
+}
- for (prm = adjacentPyrams.begin(); prm != adjacentPyrams.end(); ++prm)
- MergeAdjacent( *prm, mesh, nodesToMove );
+//================================================================================
+/*!
+ * \brief Merges adjacent pyramids
+ */
+//================================================================================
+
+void StdMeshers_QuadToTriaAdaptor::MergeAdjacent(const SMDS_MeshElement* PrmI,
+ set<const SMDS_MeshNode*>& nodesToMove)
+{
+ TIDSortedElemSet adjacentPyrams;
+ bool mergedPyrams = false;
+ for(int k=0; k<4; k++) // loop on 4 base nodes of PrmI
+ {
+ const SMDS_MeshNode* n = PrmI->GetNode(k);
+ SMDS_ElemIteratorPtr vIt = n->GetInverseElementIterator( SMDSAbs_Volume );
+ while ( vIt->more() )
+ {
+ const SMDS_MeshElement* PrmJ = vIt->next();
+ if ( PrmJ->NbCornerNodes() != 5 || !adjacentPyrams.insert( PrmJ ).second )
+ continue;
+ if ( PrmI != PrmJ && TooCloseAdjacent( PrmI, PrmJ, GetMesh()->HasShapeToMesh() ))
+ {
+ MergePiramids( PrmI, PrmJ, nodesToMove );
+ mergedPyrams = true;
+ // container of inverse elements can change
+ vIt = n->GetInverseElementIterator( SMDSAbs_Volume );
+ }
}
}
+ if ( mergedPyrams )
+ {
+ TIDSortedElemSet::iterator prm;
+ for (prm = adjacentPyrams.begin(); prm != adjacentPyrams.end(); ++prm)
+ MergeAdjacent( *prm, nodesToMove );
+ }
}
//================================================================================
//================================================================================
StdMeshers_QuadToTriaAdaptor::StdMeshers_QuadToTriaAdaptor():
- myElemSearcher(0), myNbTriangles(0)
+ myElemSearcher(0)
{
}
StdMeshers_QuadToTriaAdaptor::~StdMeshers_QuadToTriaAdaptor()
{
- // delete temporary faces
- TQuad2Trias::iterator f_f = myResMap.begin(), ffEnd = myResMap.end();
- for ( ; f_f != ffEnd; ++f_f )
- {
- TTriaList& fList = f_f->second;
- TTriaList::iterator f = fList.begin(), fEnd = fList.end();
- for ( ; f != fEnd; ++f )
- delete *f;
- }
- myResMap.clear();
-
+ // temporary faces are deleted by ~SMESH_ProxyMesh()
if ( myElemSearcher ) delete myElemSearcher;
myElemSearcher=0;
}
vector< const SMDS_MeshElement* > suspectElems;
searcher->GetElementsNearLine( line, SMDSAbs_Face, suspectElems);
-// for (TopExp_Explorer exp(aShape,TopAbs_FACE);exp.More();exp.Next()) {
-// const TopoDS_Shape& aShapeFace = exp.Current();
-// if(aShapeFace==NotCheckedFace)
-// continue;
-// const SMESHDS_SubMesh * aSubMeshDSFace = meshDS->MeshElements(aShapeFace);
-// if ( aSubMeshDSFace ) {
-// SMDS_ElemIteratorPtr iteratorElem = aSubMeshDSFace->GetElements();
-// while ( iteratorElem->more() ) { // loop on elements on a face
-// const SMDS_MeshElement* face = iteratorElem->next();
for ( int i = 0; i < suspectElems.size(); ++i )
{
const SMDS_MeshElement* face = suspectElems[i];
if ( face == NotCheckedFace ) continue;
Handle(TColgp_HSequenceOfPnt) aContour = new TColgp_HSequenceOfPnt;
for ( int i = 0; i < face->NbCornerNodes(); ++i )
- aContour->Append( SMESH_MeshEditor::TNodeXYZ( face->GetNode(i) ));
+ aContour->Append( SMESH_TNodeXYZ( face->GetNode(i) ));
if( HasIntersection(P, PC, Pres, aContour) ) {
res = true;
double tmp = PC.Distance(Pres);
{
if( face->NbCornerNodes() != 4 )
{
- myNbTriangles += int( face->NbCornerNodes() == 3 );
return NOT_QUAD;
}
gp_XYZ xyzC(0., 0., 0.);
for ( i = 0; i < 4; ++i )
{
- gp_XYZ p = SMESH_MeshEditor::TNodeXYZ( FNodes[i] = face->GetNode(i) );
+ gp_XYZ p = SMESH_TNodeXYZ( FNodes[i] = face->GetNode(i) );
PN->SetValue( i+1, p );
xyzC += p;
}
PC = xyzC/4;
- //cout<<" PC("<<PC.X()<<","<<PC.Y()<<","<<PC.Z()<<")"<<endl;
int nbp = 4;
//purpose :
//=======================================================================
-bool StdMeshers_QuadToTriaAdaptor::Compute(SMESH_Mesh& aMesh, const TopoDS_Shape& aShape)
+bool StdMeshers_QuadToTriaAdaptor::Compute(SMESH_Mesh& aMesh,
+ const TopoDS_Shape& aShape,
+ SMESH_ProxyMesh* aProxyMesh)
{
- myResMap.clear();
- myPyramids.clear();
- myNbTriangles = 0;
- myShape = aShape;
+ SMESH_ProxyMesh::setMesh( aMesh );
+
+ if ( aShape.ShapeType() != TopAbs_SOLID &&
+ aShape.ShapeType() != TopAbs_SHELL )
+ return false;
+
+ vector<const SMDS_MeshElement*> myPyramids;
SMESHDS_Mesh * meshDS = aMesh.GetMeshDS();
SMESH_MesherHelper helper(aMesh);
helper.IsQuadraticSubMesh(aShape);
helper.SetElementsOnShape( true );
+ if ( myElemSearcher ) delete myElemSearcher;
+ if ( aProxyMesh )
+ myElemSearcher = SMESH_MeshEditor(&aMesh).GetElementSearcher( aProxyMesh->GetFaces(aShape));
+ else
+ myElemSearcher = SMESH_MeshEditor(&aMesh).GetElementSearcher();
+
+ const SMESHDS_SubMesh * aSubMeshDSFace;
+ Handle(TColgp_HArray1OfPnt) PN = new TColgp_HArray1OfPnt(1,5);
+ Handle(TColgp_HArray1OfVec) VN = new TColgp_HArray1OfVec(1,4);
+ vector<const SMDS_MeshNode*> FNodes(5);
+ gp_Pnt PC;
+ gp_Vec VNorm;
+
for (TopExp_Explorer exp(aShape,TopAbs_FACE);exp.More();exp.Next())
{
const TopoDS_Shape& aShapeFace = exp.Current();
- const SMESHDS_SubMesh * aSubMeshDSFace = meshDS->MeshElements( aShapeFace );
+ if ( aProxyMesh )
+ aSubMeshDSFace = aProxyMesh->GetSubMesh( aShapeFace );
+ else
+ aSubMeshDSFace = meshDS->MeshElements( aShapeFace );
+
+ vector<const SMDS_MeshElement*> trias, quads;
+ bool hasNewTrias = false;
+
if ( aSubMeshDSFace )
{
- bool isRev = SMESH_Algo::IsReversedSubMesh( TopoDS::Face(aShapeFace), meshDS );
+ bool isRev = false;
+ if ( helper.NbAncestors( aShapeFace, aMesh, aShape.ShapeType() ) > 1 )
+ isRev = SMESH_Algo::IsReversedSubMesh( TopoDS::Face(aShapeFace), meshDS );
SMDS_ElemIteratorPtr iteratorElem = aSubMeshDSFace->GetElements();
while ( iteratorElem->more() ) // loop on elements on a geometrical face
{
const SMDS_MeshElement* face = iteratorElem->next();
- //cout<<endl<<"================= face->GetID() = "<<face->GetID()<<endl;
- // preparation step using face info
- Handle(TColgp_HArray1OfPnt) PN = new TColgp_HArray1OfPnt(1,5);
- Handle(TColgp_HArray1OfVec) VN = new TColgp_HArray1OfVec(1,4);
- vector<const SMDS_MeshNode*> FNodes(5);
- gp_Pnt PC;
- gp_Vec VNorm;
- int stat = Preparation(face, PN, VN, FNodes, PC, VNorm);
- if(stat==0)
- continue;
-
- if(stat==2)
+ // preparation step to get face info
+ int stat = Preparation(face, PN, VN, FNodes, PC, VNorm);
+ switch ( stat )
{
- // degenerate face
- // add triangles to result map
- SMDS_MeshFace* NewFace;
- if(!isRev)
- NewFace = new Q2TAdaptor_Triangle( FNodes[0], FNodes[1], FNodes[2] );
- else
- NewFace = new Q2TAdaptor_Triangle( FNodes[0], FNodes[2], FNodes[1] );
- TTriaList aList( 1, NewFace );
- myResMap.insert(make_pair(face,aList));
- continue;
- }
+ case NOT_QUAD:
- if(!isRev) VNorm.Reverse();
- double xc = 0., yc = 0., zc = 0.;
- int i = 1;
- for(; i<=4; i++) {
- gp_Pnt Pbest;
- if(!isRev)
- Pbest = FindBestPoint(PN->Value(i), PN->Value(i+1), PC, VN->Value(i).Reversed());
- else
- Pbest = FindBestPoint(PN->Value(i), PN->Value(i+1), PC, VN->Value(i));
- xc += Pbest.X();
- yc += Pbest.Y();
- zc += Pbest.Z();
- }
- gp_Pnt PCbest(xc/4., yc/4., zc/4.);
+ trias.push_back( face );
+ break;
- // check PCbest
- double height = PCbest.Distance(PC);
- if(height<1.e-6) {
- // create new PCbest using a bit shift along VNorm
- PCbest = PC.XYZ() + VNorm.XYZ() * 0.001;
- }
- else {
- // check possible intersection with other faces
- gp_Pnt Pint;
- bool check = CheckIntersection(PCbest, PC, Pint, aMesh, aShape, face);
- if(check) {
- //cout<<"--PC("<<PC.X()<<","<<PC.Y()<<","<<PC.Z()<<")"<<endl;
- //cout<<" PCbest("<<PCbest.X()<<","<<PCbest.Y()<<","<<PCbest.Z()<<")"<<endl;
- double dist = PC.Distance(Pint)/3.;
- gp_Dir aDir(gp_Vec(PC,PCbest));
- PCbest = PC.XYZ() + aDir.XYZ() * dist;
+ case DEGEN_QUAD:
+ {
+ // degenerate face
+ // add triangles to result map
+ SMDS_MeshFace* NewFace;
+ if(!isRev)
+ NewFace = meshDS->AddFace( FNodes[0], FNodes[1], FNodes[2] );
+ else
+ NewFace = meshDS->AddFace( FNodes[0], FNodes[2], FNodes[1] );
+ storeTmpElement( NewFace );
+ trias.push_back ( NewFace );
+ quads.push_back( face );
+ hasNewTrias = true;
+ break;
}
- else {
- gp_Vec VB(PC,PCbest);
- gp_Pnt PCbestTmp = PC.XYZ() + VB.XYZ() * 3.0;
- check = CheckIntersection(PCbestTmp, PC, Pint, aMesh, aShape, face);
- if(check) {
- double dist = PC.Distance(Pint)/3.;
- if(dist<height) {
+
+ case QUAD:
+ {
+ if(!isRev) VNorm.Reverse();
+ double xc = 0., yc = 0., zc = 0.;
+ int i = 1;
+ for(; i<=4; i++) {
+ gp_Pnt Pbest;
+ if(!isRev)
+ Pbest = FindBestPoint(PN->Value(i), PN->Value(i+1), PC, VN->Value(i).Reversed());
+ else
+ Pbest = FindBestPoint(PN->Value(i), PN->Value(i+1), PC, VN->Value(i));
+ xc += Pbest.X();
+ yc += Pbest.Y();
+ zc += Pbest.Z();
+ }
+ gp_Pnt PCbest(xc/4., yc/4., zc/4.);
+
+ // check PCbest
+ double height = PCbest.Distance(PC);
+ if(height<1.e-6) {
+ // create new PCbest using a bit shift along VNorm
+ PCbest = PC.XYZ() + VNorm.XYZ() * 0.001;
+ }
+ else {
+ // check possible intersection with other faces
+ gp_Pnt Pint;
+ bool check = CheckIntersection(PCbest, PC, Pint, aMesh, aShape, face);
+ if(check) {
+ //cout<<"--PC("<<PC.X()<<","<<PC.Y()<<","<<PC.Z()<<")"<<endl;
+ //cout<<" PCbest("<<PCbest.X()<<","<<PCbest.Y()<<","<<PCbest.Z()<<")"<<endl;
+ double dist = PC.Distance(Pint)/3.;
gp_Dir aDir(gp_Vec(PC,PCbest));
PCbest = PC.XYZ() + aDir.XYZ() * dist;
}
+ else {
+ gp_Vec VB(PC,PCbest);
+ gp_Pnt PCbestTmp = PC.XYZ() + VB.XYZ() * 3.0;
+ check = CheckIntersection(PCbestTmp, PC, Pint, aMesh, aShape, face);
+ if(check) {
+ double dist = PC.Distance(Pint)/3.;
+ if(dist<height) {
+ gp_Dir aDir(gp_Vec(PC,PCbest));
+ PCbest = PC.XYZ() + aDir.XYZ() * dist;
+ }
+ }
+ }
}
- }
- }
- // create node for PCbest
- SMDS_MeshNode* NewNode = helper.AddNode( PCbest.X(), PCbest.Y(), PCbest.Z() );
+ // create node for PCbest
+ SMDS_MeshNode* NewNode = helper.AddNode( PCbest.X(), PCbest.Y(), PCbest.Z() );
+
+ // add triangles to result map
+ for(i=0; i<4; i++)
+ {
+ trias.push_back ( meshDS->AddFace( NewNode, FNodes[i], FNodes[i+1] ));
+ storeTmpElement( trias.back() );
+ }
+ // create a pyramid
+ if ( isRev ) swap( FNodes[1], FNodes[3]);
+ SMDS_MeshVolume* aPyram =
+ helper.AddVolume( FNodes[0], FNodes[1], FNodes[2], FNodes[3], NewNode );
+ myPyramids.push_back(aPyram);
- // add triangles to result map
- TTriaList& triaList = myResMap.insert( make_pair( face, TTriaList() ))->second;
- for(i=0; i<4; i++)
- triaList.push_back( new Q2TAdaptor_Triangle( NewNode, FNodes[i], FNodes[i+1] ));
+ quads.push_back( face );
+ hasNewTrias = true;
+ break;
- // create a pyramid
- if ( isRev ) swap( FNodes[1], FNodes[3]);
- SMDS_MeshVolume* aPyram =
- helper.AddVolume( FNodes[0], FNodes[1], FNodes[2], FNodes[3], NewNode );
- myPyramids.push_back(aPyram);
+ } // case QUAD:
+ } // switch ( stat )
} // end loop on elements on a face submesh
+
+ bool sourceSubMeshIsProxy = false;
+ if ( aProxyMesh )
+ {
+ // move proxy sub-mesh from other proxy mesh to this
+ sourceSubMeshIsProxy = takeProxySubMesh( aShapeFace, aProxyMesh );
+ // move also tmp elements added in mesh
+ takeTmpElemsInMesh( aProxyMesh );
+ }
+ if ( hasNewTrias )
+ {
+ SMESH_ProxyMesh::SubMesh* prxSubMesh = getProxySubMesh( aShapeFace );
+ prxSubMesh->ChangeElements( trias.begin(), trias.end() );
+
+ // delete tmp quadrangles removed from aProxyMesh
+ if ( sourceSubMeshIsProxy )
+ {
+ for ( unsigned i = 0; i < quads.size(); ++i )
+ removeTmpElement( quads[i] );
+
+ delete myElemSearcher;
+ myElemSearcher =
+ SMESH_MeshEditor(&aMesh).GetElementSearcher( aProxyMesh->GetFaces(aShape));
+ }
+ }
}
} // end for(TopExp_Explorer exp(aShape,TopAbs_FACE);exp.More();exp.Next()) {
- return Compute2ndPart(aMesh);
+ return Compute2ndPart(aMesh, myPyramids);
}
//================================================================================
bool StdMeshers_QuadToTriaAdaptor::Compute(SMESH_Mesh& aMesh)
{
- myResMap.clear();
- myPyramids.clear();
+ SMESH_ProxyMesh::setMesh( aMesh );
+ SMESH_ProxyMesh::_allowedTypes.push_back( SMDSEntity_Triangle );
+ SMESH_ProxyMesh::_allowedTypes.push_back( SMDSEntity_Quad_Triangle );
+ if ( aMesh.NbQuadrangles() < 1 )
+ return false;
+
+ vector<const SMDS_MeshElement*> myPyramids;
SMESH_MesherHelper helper(aMesh);
helper.IsQuadraticSubMesh(aMesh.GetShapeToMesh());
helper.SetElementsOnShape( true );
SMESH_ElementSearcher* searcher = const_cast<SMESH_ElementSearcher*>(myElemSearcher);
SMESHDS_Mesh * meshDS = aMesh.GetMeshDS();
+ SMESH_ProxyMesh::SubMesh* prxSubMesh = getProxySubMesh();
SMDS_FaceIteratorPtr fIt = meshDS->facesIterator(/*idInceasingOrder=*/true);
while( fIt->more())
{
const SMDS_MeshElement* face = fIt->next();
if ( !face ) continue;
- //cout<<endl<<"================= face->GetID() = "<<face->GetID()<<endl;
// retrieve needed information about a face
Handle(TColgp_HArray1OfPnt) PN = new TColgp_HArray1OfPnt(1,5);
Handle(TColgp_HArray1OfVec) VN = new TColgp_HArray1OfVec(1,4);
if ( what == DEGEN_QUAD )
{
// degenerate face
- // add triangles to result map
- TTriaList aList;
+ // add a triangle to the proxy mesh
SMDS_MeshFace* NewFace;
- // check orientation
+ // check orientation
double tmp = PN->Value(1).Distance(PN->Value(2)) + PN->Value(2).Distance(PN->Value(3));
// far points in VNorm direction
gp_Pnt Ptmp1 = PC.XYZ() + VNorm.XYZ() * tmp * 1.e6;
if(F==face) continue;
Handle(TColgp_HSequenceOfPnt) aContour = new TColgp_HSequenceOfPnt;
for ( int i = 0; i < 4; ++i )
- aContour->Append( SMESH_MeshEditor::TNodeXYZ( F->GetNode(i) ));
+ aContour->Append( SMESH_TNodeXYZ( F->GetNode(i) ));
gp_Pnt PPP;
if( !volumes[0] && HasIntersection(Ptmp1, PC, PPP, aContour) ) {
IsOK1 = true;
}
}
if(!IsRev)
- NewFace = new Q2TAdaptor_Triangle( FNodes[0], FNodes[1], FNodes[2] );
+ NewFace = meshDS->AddFace( FNodes[0], FNodes[1], FNodes[2] );
else
- NewFace = new Q2TAdaptor_Triangle( FNodes[0], FNodes[2], FNodes[1] );
- aList.push_back(NewFace);
- myResMap.insert(make_pair(face,aList));
+ NewFace = meshDS->AddFace( FNodes[0], FNodes[2], FNodes[1] );
+ storeTmpElement( NewFace );
+ prxSubMesh->AddElement( NewFace );
continue;
}
+ // Case of non-degenerated quadrangle
+
// Find pyramid peak
gp_XYZ PCbest(0., 0., 0.); // pyramid peak
PCbest = PC.XYZ() + VNorm.XYZ() * 0.001;
height = PC.Distance(PCbest);
}
- //cout<<" PCbest("<<PCbest.X()<<","<<PCbest.Y()<<","<<PCbest.Z()<<")"<<endl;
// Restrict pyramid height by intersection with other faces
gp_Vec tmpDir(PC,PCbest); tmpDir.Normalize();
Handle(TColgp_HSequenceOfPnt) aContour = new TColgp_HSequenceOfPnt;
int nbN = F->NbNodes() / ( F->IsQuadratic() ? 2 : 1 );
for ( i = 0; i < nbN; ++i )
- aContour->Append( SMESH_MeshEditor::TNodeXYZ( F->GetNode(i) ));
+ aContour->Append( SMESH_TNodeXYZ( F->GetNode(i) ));
gp_Pnt intP;
for ( int isRev = 0; isRev < 2; ++isRev )
{
SMDS_MeshNode* NewNode = helper.AddNode( PCbest.X(), PCbest.Y(), PCbest.Z() );
// add triangles to result map
- TTriaList& aList = myResMap.insert( make_pair( face, TTriaList()))->second;
for(i=0; i<4; i++) {
SMDS_MeshFace* NewFace;
if(isRev)
- NewFace = new Q2TAdaptor_Triangle( NewNode, FNodes[i], FNodes[i+1] );
+ NewFace = meshDS->AddFace( NewNode, FNodes[i], FNodes[i+1] );
else
- NewFace = new Q2TAdaptor_Triangle( NewNode, FNodes[i+1], FNodes[i] );
- aList.push_back(NewFace);
+ NewFace = meshDS->AddFace( NewNode, FNodes[i+1], FNodes[i] );
+ storeTmpElement( NewFace );
+ prxSubMesh->AddElement( NewFace );
}
// create a pyramid
SMDS_MeshVolume* aPyram;
}
} // end loop on all faces
- return Compute2ndPart(aMesh);
+ return Compute2ndPart(aMesh, myPyramids);
}
//================================================================================
*/
//================================================================================
-bool StdMeshers_QuadToTriaAdaptor::Compute2ndPart(SMESH_Mesh& aMesh)
+bool StdMeshers_QuadToTriaAdaptor::Compute2ndPart(SMESH_Mesh& aMesh,
+ const vector<const SMDS_MeshElement*>& myPyramids)
{
if(myPyramids.empty())
return true;
SMESHDS_Mesh * meshDS = aMesh.GetMeshDS();
- int i, j, k, myShapeID = myPyramids[0]->GetNode(4)->GetPosition()->GetShapeId();
+ int i, j, k, myShapeID = myPyramids[0]->GetNode(4)->getshapeId();
if ( !myElemSearcher )
myElemSearcher = SMESH_MeshEditor(&aMesh).GetElementSearcher();
for ( i = 0; i < myPyramids.size(); ++i )
{
const SMDS_MeshElement* PrmI = myPyramids[i];
- MergeAdjacent( PrmI, aMesh, nodesToMove );
+ MergeAdjacent( PrmI, nodesToMove );
}
// iterate on all pyramids
for(k=0; k<5; k++) // loop on 4 base nodes of PrmI
{
const SMDS_MeshNode* n = PrmI->GetNode(k);
- PsI[k] = SMESH_MeshEditor::TNodeXYZ( n );
+ PsI[k] = SMESH_TNodeXYZ( n );
SMDS_ElemIteratorPtr vIt = n->GetInverseElementIterator( SMDSAbs_Volume );
while ( vIt->more() )
- checkedPyrams.insert( vIt->next() );
+ {
+ const SMDS_MeshElement* PrmJ = vIt->next();
+ if ( SMESH_Algo::GetCommonNodes( PrmI, PrmJ ).size() > 1 )
+ checkedPyrams.insert( PrmJ );
+ }
}
// check intersection with distant pyramids
for(k=0; k<4; k++) // loop on 4 base nodes of PrmI
{
gp_Vec Vtmp(PsI[k],PsI[4]);
- gp_Pnt Pshift = PsI[k].XYZ() + Vtmp.XYZ() * 0.01; // base node moved a bit to apex
-
gp_Ax1 line( PsI[k], Vtmp );
vector< const SMDS_MeshElement* > suspectPyrams;
searcher->GetElementsNearLine( line, SMDSAbs_Volume, suspectPyrams);
const SMDS_MeshElement* PrmJ = suspectPyrams[j];
if ( PrmJ == PrmI || PrmJ->NbCornerNodes() != 5 )
continue;
- if ( myShapeID != PrmJ->GetNode(4)->GetPosition()->GetShapeId())
+ if ( myShapeID != PrmJ->GetNode(4)->getshapeId())
continue; // pyramid from other SOLID
if ( PrmI->GetNode(4) == PrmJ->GetNode(4) )
continue; // pyramids PrmI and PrmJ already merged
vector<gp_Pnt> PsJ( xyzIt, TXyzIterator() );
gp_Pnt Pint;
- bool hasInt =
+ bool hasInt=false;
+ for(k=0; k<4 && !hasInt; k++) {
+ gp_Vec Vtmp(PsI[k],PsI[4]);
+ gp_Pnt Pshift = PsI[k].XYZ() + Vtmp.XYZ() * 0.01; // base node moved a bit to apex
+ hasInt =
( HasIntersection3( Pshift, PsI[4], Pint, PsJ[0], PsJ[1], PsJ[4]) ||
HasIntersection3( Pshift, PsI[4], Pint, PsJ[1], PsJ[2], PsJ[4]) ||
HasIntersection3( Pshift, PsI[4], Pint, PsJ[2], PsJ[3], PsJ[4]) ||
HasIntersection3( Pshift, PsI[4], Pint, PsJ[3], PsJ[0], PsJ[4]) );
-
+ }
for(k=0; k<4 && !hasInt; k++) {
gp_Vec Vtmp(PsJ[k],PsJ[4]);
gp_Pnt Pshift = PsJ[k].XYZ() + Vtmp.XYZ() * 0.01;
if(nbc>0)
{
// Merge the two pyramids and others already merged with them
- MergePiramids( PrmI, PrmJ, meshDS, nodesToMove );
+ MergePiramids( PrmI, PrmJ, nodesToMove );
}
else { // nbc==0
nodesToMove.insert( aNode2 );
}
// fix intersections that could appear after apex movement
- MergeAdjacent( PrmI, aMesh, nodesToMove );
- MergeAdjacent( PrmJ, aMesh, nodesToMove );
+ MergeAdjacent( PrmI, nodesToMove );
+ MergeAdjacent( PrmJ, nodesToMove );
} // end if(hasInt)
} // loop on suspectPyrams
meshDS->MoveNode( *n, (*n)->X(), (*n)->Y(), (*n)->Z() );
}
- // rebind triangles of pyramids sharing the same base quadrangle to the first
- // entrance of the base quadrangle
- TQuad2Trias::iterator q2t = myResMap.begin(), q2tPrev = q2t;
- for ( ++q2t; q2t != myResMap.end(); ++q2t, ++q2tPrev )
- {
- if ( q2t->first == q2tPrev->first )
- q2tPrev->second.splice( q2tPrev->second.end(), q2t->second );
- }
- // delete removed triangles and count resulting nb of triangles
- for ( q2t = myResMap.begin(); q2t != myResMap.end(); ++q2t )
+ // erase removed triangles from the proxy mesh
+ if ( !myRemovedTrias.empty() )
{
- TTriaList & trias = q2t->second;
- for ( TTriaList::iterator tri = trias.begin(); tri != trias.end(); )
- if ( ((const Q2TAdaptor_Triangle*) *tri)->IsRemoved() )
- delete *tri, trias.erase( tri++ );
- else
- tri++, myNbTriangles++;
+ for ( int i = 0; i <= meshDS->MaxShapeIndex(); ++i )
+ if ( SMESH_ProxyMesh::SubMesh* sm = findProxySubMesh(i))
+ {
+ vector<const SMDS_MeshElement *> faces;
+ faces.reserve( sm->NbElements() );
+ SMDS_ElemIteratorPtr fIt = sm->GetElements();
+ while ( fIt->more() )
+ {
+ const SMDS_MeshElement* tria = fIt->next();
+ set<const SMDS_MeshElement*>::iterator rmTria = myRemovedTrias.find( tria );
+ if ( rmTria != myRemovedTrias.end() )
+ myRemovedTrias.erase( rmTria );
+ else
+ faces.push_back( tria );
+ }
+ sm->ChangeElements( faces.begin(), faces.end() );
+ }
}
- myPyramids.clear(); // no more needed
myDegNodes.clear();
delete myElemSearcher;
return true;
}
-//================================================================================
-/*!
- * \brief Return list of created triangles for given face
- */
-//================================================================================
-
-const list<const SMDS_MeshFace* >* StdMeshers_QuadToTriaAdaptor::GetTriangles (const SMDS_MeshElement* aQuad)
-{
- TQuad2Trias::iterator it = myResMap.find(aQuad);
- return ( it != myResMap.end() ? & it->second : 0 );
-}
