-// Copyright (C) 2007-2008 CEA/DEN, EDF R&D, OPEN CASCADE
+// Copyright (C) 2007-2013 CEA/DEN, EDF R&D, OPEN CASCADE
//
-// Copyright (C) 2003-2007 OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
-// CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Lesser General Public
+// License as published by the Free Software Foundation; either
+// version 2.1 of the License.
//
-// This library is free software; you can redistribute it and/or
-// modify it under the terms of the GNU Lesser General Public
-// License as published by the Free Software Foundation; either
-// version 2.1 of the License.
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+// Lesser General Public License for more details.
//
-// This library is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-// Lesser General Public License for more details.
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
-// You should have received a copy of the GNU Lesser General Public
-// License along with this library; if not, write to the Free Software
-// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+// See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
//
-// 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
// Author : Sergey KUUL (skl)
-//
+
#include "StdMeshers_QuadToTriaAdaptor.hxx"
-//#include <TColgp_HArray1OfPnt.hxx>
-//#include <TColgp_HArray1OfVec.hxx>
+#include "SMDS_SetIterator.hxx"
+
+#include "SMESHDS_GroupBase.hxx"
+#include "SMESH_Algo.hxx"
+#include "SMESH_Group.hxx"
+#include "SMESH_MeshAlgos.hxx"
+#include "SMESH_MesherHelper.hxx"
+
+#include <IntAna_IntConicQuad.hxx>
+#include <IntAna_Quadric.hxx>
+#include <TColgp_HArray1OfPnt.hxx>
+#include <TColgp_HArray1OfVec.hxx>
+#include <TColgp_HSequenceOfPnt.hxx>
#include <TopExp_Explorer.hxx>
#include <TopoDS.hxx>
-#include <SMESH_Algo.hxx>
-#include <TColgp_HSequenceOfPnt.hxx>
-#include <TColStd_MapOfInteger.hxx>
-#include <TColStd_HSequenceOfInteger.hxx>
-#include <IntAna_Quadric.hxx>
-#include <IntAna_IntConicQuad.hxx>
#include <gp_Lin.hxx>
#include <gp_Pln.hxx>
-#include <SMDS_FaceOfNodes.hxx>
+#include "utilities.h"
-#include <NCollection_Array1.hxx>
-typedef NCollection_Array1<TColStd_SequenceOfInteger> StdMeshers_Array1OfSequenceOfInteger;
+#include <string>
+#include <numeric>
+#include <limits>
+using namespace std;
-//=======================================================================
-//function : StdMeshers_QuadToTriaAdaptor
-//purpose :
-//=======================================================================
+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_TNodeXYZ, SMDS_ElemIteratorPtr > TXyzIterator;
-StdMeshers_QuadToTriaAdaptor::StdMeshers_QuadToTriaAdaptor()
+namespace
{
+ //================================================================================
+ /*!
+ * \brief Return true if two nodes of triangles are equal
+ */
+ //================================================================================
+
+ bool EqualTriangles(const SMDS_MeshElement* F1,const SMDS_MeshElement* F2)
+ {
+ return
+ ( 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 Return true if two adjacent pyramids are too close one to another
+ * so that a tetrahedron to built between them would have too poor quality
+ */
+ //================================================================================
+
+ bool TooCloseAdjacent( const SMDS_MeshElement* PrmI,
+ const SMDS_MeshElement* PrmJ,
+ const bool hasShape)
+ {
+ const SMDS_MeshNode* nApexI = PrmI->GetNode(4);
+ const SMDS_MeshNode* nApexJ = PrmJ->GetNode(4);
+ if ( nApexI == nApexJ ||
+ nApexI->getshapeId() != nApexJ->getshapeId() )
+ return false;
+
+ // Find two common base nodes and their indices within PrmI and PrmJ
+ const SMDS_MeshNode* baseNodes[2] = { 0,0 };
+ int baseNodesIndI[2], baseNodesIndJ[2];
+ for ( int i = 0; i < 4 ; ++i )
+ {
+ int j = PrmJ->GetNodeIndex( PrmI->GetNode(i));
+ if ( j >= 0 )
+ {
+ int ind = baseNodes[0] ? 1:0;
+ if ( baseNodes[ ind ])
+ return false; // pyramids with a common base face
+ 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_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 );
+ gp_Vec nI = baseVec.Crossed( baI );
+ gp_Vec nJ = baseVec.Crossed( baJ );
+
+ // Check angle between normals
+ double angle = nI.Angle( nJ );
+ bool tooClose = ( angle < 15. * M_PI / 180. );
+
+ // Check if pyramids collide
+ if ( !tooClose && baI * baJ > 0 )
+ {
+ // find out if nI points outside of PrmI or inside
+ int dInd = baseNodesIndI[1] - baseNodesIndI[0];
+ bool isOutI = ( abs(dInd)==1 ) ? dInd < 0 : dInd > 0;
+
+ // find out sign of projection of nJ to baI
+ double proj = baI * nJ;
+
+ tooClose = isOutI ? proj > 0 : proj < 0;
+ }
+
+ // Check if PrmI and PrmJ are in same domain
+ if ( tooClose && !hasShape )
+ {
+ // check order of baseNodes within pyramids, it must be opposite
+ 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 ( const SMDS_MeshElement* f =
+ SMESH_MeshAlgos::FindFaceInSet( baseNodes[0], baseNodes[1],
+ emptySet, avoidSet, &i1, &i2 ))
+ {
+ avoidSet.insert( f );
+
+ // face node other than baseNodes
+ int otherNodeInd = 0;
+ 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 ||
+ PrmJ->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_TNodeXYZ( otherFaceNode ));
+ if ( nI * baOFN > 0 && nJ * baOFN > 0 )
+ {
+ tooClose = false; // f is between pyramids
+ break;
+ }
+ }
+ }
+
+ return tooClose;
+ }
+
+ //================================================================================
+ /*!
+ * \brief Move medium nodes of merged quadratic pyramids
+ */
+ //================================================================================
+
+ void UpdateQuadraticPyramids(const set<const SMDS_MeshNode*>& commonApex,
+ SMESHDS_Mesh* meshDS)
+ {
+ typedef SMDS_StdIterator< const SMDS_MeshElement*, SMDS_ElemIteratorPtr > TStdElemIterator;
+ TStdElemIterator itEnd;
+
+ // shift of node index to get medium nodes between the 4 base nodes and the apex
+ const int base2MediumShift = 9;
+
+ set<const SMDS_MeshNode*>::const_iterator nIt = commonApex.begin();
+ for ( ; nIt != commonApex.end(); ++nIt )
+ {
+ SMESH_TNodeXYZ apex( *nIt );
+
+ vector< const SMDS_MeshElement* > pyrams // pyramids sharing the apex node
+ ( TStdElemIterator( apex._node->GetInverseElementIterator( SMDSAbs_Volume )), itEnd );
+
+ // Select medium nodes to keep and medium nodes to remove
+
+ typedef map < const SMDS_MeshNode*, const SMDS_MeshNode*, TIDCompare > TN2NMap;
+ TN2NMap base2medium; // to keep
+ vector< const SMDS_MeshNode* > nodesToRemove;
+
+ for ( unsigned i = 0; i < pyrams.size(); ++i )
+ for ( int baseIndex = 0; baseIndex < PYRAM_APEX; ++baseIndex )
+ {
+ SMESH_TNodeXYZ base = pyrams[i]->GetNode( baseIndex );
+ const SMDS_MeshNode* medium = pyrams[i]->GetNode( baseIndex + base2MediumShift );
+ TN2NMap::iterator b2m = base2medium.insert( make_pair( base._node, medium )).first;
+ if ( b2m->second != medium )
+ {
+ nodesToRemove.push_back( medium );
+ }
+ else
+ {
+ // move the kept medium node
+ gp_XYZ newXYZ = 0.5 * ( apex + base );
+ meshDS->MoveNode( medium, newXYZ.X(), newXYZ.Y(), newXYZ.Z() );
+ }
+ }
+
+ // Within pyramids, replace nodes to remove by nodes to keep
+
+ for ( unsigned i = 0; i < pyrams.size(); ++i )
+ {
+ vector< const SMDS_MeshNode* > nodes( pyrams[i]->begin_nodes(),
+ pyrams[i]->end_nodes() );
+ for ( int baseIndex = 0; baseIndex < PYRAM_APEX; ++baseIndex )
+ {
+ const SMDS_MeshNode* base = pyrams[i]->GetNode( baseIndex );
+ nodes[ baseIndex + base2MediumShift ] = base2medium[ base ];
+ }
+ meshDS->ChangeElementNodes( pyrams[i], &nodes[0], nodes.size());
+ }
+
+ // Remove the replaced nodes
+
+ if ( !nodesToRemove.empty() )
+ {
+ SMESHDS_SubMesh * sm = meshDS->MeshElements( nodesToRemove[0]->getshapeId() );
+ for ( unsigned i = 0; i < nodesToRemove.size(); ++i )
+ meshDS->RemoveFreeNode( nodesToRemove[i], sm, /*fromGroups=*/false);
+ }
+ }
+ }
+
}
+//================================================================================
+/*!
+ * \brief Merge the two pyramids (i.e. fuse their apex) and others already merged with them
+ */
+//================================================================================
+
+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 )
+ {
+ const SMDS_MeshElement* FI = inverseElems[i];
+ 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 )
+ {
+ 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);
+}
+
+//================================================================================
+/*!
+ * \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 );
+ }
+}
+
+//================================================================================
+/*!
+ * \brief Constructor
+ */
+//================================================================================
+
+StdMeshers_QuadToTriaAdaptor::StdMeshers_QuadToTriaAdaptor():
+ myElemSearcher(0)
+{
+}
//================================================================================
/*!
//================================================================================
StdMeshers_QuadToTriaAdaptor::~StdMeshers_QuadToTriaAdaptor()
-{}
-
+{
+ // temporary faces are deleted by ~SMESH_ProxyMesh()
+ if ( myElemSearcher ) delete myElemSearcher;
+ myElemSearcher=0;
+}
//=======================================================================
//function : FindBestPoint
-//purpose : Auxilare for Compute()
+//purpose : Return a point P laying on the line (PC,V) so that triangle
+// (P, P1, P2) to be equilateral as much as possible
// V - normal to (P1,P2,PC)
//=======================================================================
+
static gp_Pnt FindBestPoint(const gp_Pnt& P1, const gp_Pnt& P2,
const gp_Pnt& PC, const gp_Vec& V)
{
- double a = P1.Distance(P2);
- double b = P1.Distance(PC);
- double c = P2.Distance(PC);
+ gp_Pnt Pbest = PC;
+ const double a = P1.Distance(P2);
+ const double b = P1.Distance(PC);
+ const double c = P2.Distance(PC);
if( a < (b+c)/2 )
- return PC;
- else {
- // find shift along V in order to a became equal to (b+c)/2
- double shift = sqrt( a*a + (b*b-c*c)*(b*b-c*c)/16/a/a - (b*b+c*c)/2 );
- gp_Dir aDir(V);
- gp_Pnt Pbest( PC.X() + aDir.X()*shift, PC.Y() + aDir.Y()*shift,
- PC.Z() + aDir.Z()*shift );
return Pbest;
+ else {
+ // find shift along V in order a to became equal to (b+c)/2
+ const double Vsize = V.Magnitude();
+ if ( fabs( Vsize ) > std::numeric_limits<double>::min() )
+ {
+ const double shift = sqrt( a*a + (b*b-c*c)*(b*b-c*c)/16/a/a - (b*b+c*c)/2 );
+ Pbest.ChangeCoord() += shift * V.XYZ() / Vsize;
+ }
}
+ return Pbest;
}
-
//=======================================================================
//function : HasIntersection3
//purpose : Auxilare for HasIntersection()
// find intersection point between triangle (P1,P2,P3)
// and segment [PC,P]
//=======================================================================
+
static bool HasIntersection3(const gp_Pnt& P, const gp_Pnt& PC, gp_Pnt& Pint,
const gp_Pnt& P1, const gp_Pnt& P2, const gp_Pnt& P3)
{
return false;
if( IAICQ.NbPoints() == 1 ) {
gp_Pnt PIn = IAICQ.Point(1);
- double preci = 1.e-6;
+ const double preci = 1.e-10 * P.Distance(PC);
// check if this point is internal for segment [PC,P]
bool IsExternal =
( (PC.X()-PIn.X())*(P.X()-PIn.X()) > preci ) ||
gp_Vec V1(PIn,P1);
gp_Vec V2(PIn,P2);
gp_Vec V3(PIn,P3);
- if( V1.Magnitude()<preci || V2.Magnitude()<preci ||
+ if( V1.Magnitude()<preci ||
+ V2.Magnitude()<preci ||
V3.Magnitude()<preci ) {
Pint = PIn;
return true;
}
+ const double angularTol = 1e-6;
gp_Vec VC1 = V1.Crossed(V2);
gp_Vec VC2 = V2.Crossed(V3);
gp_Vec VC3 = V3.Crossed(V1);
- if(VC1.Magnitude()<preci) {
- if(VC2.IsOpposite(VC3,preci)) {
+ if(VC1.Magnitude()<gp::Resolution()) {
+ if(VC2.IsOpposite(VC3,angularTol)) {
return false;
}
}
- else if(VC2.Magnitude()<preci) {
- if(VC1.IsOpposite(VC3,preci)) {
+ else if(VC2.Magnitude()<gp::Resolution()) {
+ if(VC1.IsOpposite(VC3,angularTol)) {
return false;
}
}
- else if(VC3.Magnitude()<preci) {
- if(VC1.IsOpposite(VC2,preci)) {
+ else if(VC3.Magnitude()<gp::Resolution()) {
+ if(VC1.IsOpposite(VC2,angularTol)) {
return false;
}
}
else {
- if( VC1.IsOpposite(VC2,preci) || VC1.IsOpposite(VC3,preci) ||
- VC2.IsOpposite(VC3,preci) ) {
+ if( VC1.IsOpposite(VC2,angularTol) || VC1.IsOpposite(VC3,angularTol) ||
+ VC2.IsOpposite(VC3,angularTol) ) {
return false;
}
}
return false;
}
-
//=======================================================================
//function : HasIntersection
//purpose : Auxilare for CheckIntersection()
//=======================================================================
+
static bool HasIntersection(const gp_Pnt& P, const gp_Pnt& PC, gp_Pnt& Pint,
Handle(TColgp_HSequenceOfPnt)& aContour)
{
return false;
}
+//================================================================================
+/*!
+ * \brief Checks if a line segment (P,PC) intersects any mesh face.
+ * \param P - first segment end
+ * \param PC - second segment end (it is a gravity center of quadrangle)
+ * \param Pint - (out) intersection point
+ * \param aMesh - mesh
+ * \param aShape - shape to check faces on
+ * \param NotCheckedFace - mesh face not to check
+ * \retval bool - true if there is an intersection
+ */
+//================================================================================
-//=======================================================================
-//function : CheckIntersection
-//purpose : Auxilare for Compute()
-// NotCheckedFace - for optimization
-//=======================================================================
-bool StdMeshers_QuadToTriaAdaptor::CheckIntersection
- (const gp_Pnt& P, const gp_Pnt& PC,
- gp_Pnt& Pint, SMESH_Mesh& aMesh,
- const TopoDS_Shape& aShape,
- const TopoDS_Shape& NotCheckedFace)
+bool StdMeshers_QuadToTriaAdaptor::CheckIntersection (const gp_Pnt& P,
+ const gp_Pnt& PC,
+ gp_Pnt& Pint,
+ SMESH_Mesh& aMesh,
+ const TopoDS_Shape& aShape,
+ const SMDS_MeshElement* NotCheckedFace)
{
- SMESHDS_Mesh * meshDS = aMesh.GetMeshDS();
+ if ( !myElemSearcher )
+ myElemSearcher = SMESH_MeshAlgos::GetElementSearcher( *aMesh.GetMeshDS() );
+ SMESH_ElementSearcher* searcher = const_cast<SMESH_ElementSearcher*>(myElemSearcher);
+
+ //SMESHDS_Mesh * meshDS = aMesh.GetMeshDS();
//cout<<" CheckIntersection: meshDS->NbFaces() = "<<meshDS->NbFaces()<<endl;
bool res = false;
- double dist = RealLast();
+ double dist = RealLast(); // find intersection closest to the segment
gp_Pnt Pres;
- 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();
- Handle(TColgp_HSequenceOfPnt) aContour = new TColgp_HSequenceOfPnt;
- SMDS_ElemIteratorPtr nodeIt = face->nodesIterator();
- if( !face->IsQuadratic() ) {
- while ( nodeIt->more() ) {
- const SMDS_MeshNode* node = static_cast<const SMDS_MeshNode*>( nodeIt->next() );
- aContour->Append(gp_Pnt(node->X(), node->Y(), node->Z()));
- }
- }
- else {
- int nn = 0;
- while ( nodeIt->more() ) {
- nn++;
- const SMDS_MeshNode* node = static_cast<const SMDS_MeshNode*>( nodeIt->next() );
- aContour->Append(gp_Pnt(node->X(), node->Y(), node->Z()));
- if(nn==face->NbNodes()/2) break;
- }
- }
- if( HasIntersection(P, PC, Pres, aContour) ) {
- res = true;
- double tmp = PC.Distance(Pres);
- if(tmp<dist) {
- Pint = Pres;
- dist = tmp;
- }
- }
+
+ gp_Ax1 line( P, gp_Vec(P,PC));
+ vector< const SMDS_MeshElement* > suspectElems;
+ searcher->GetElementsNearLine( line, SMDSAbs_Face, suspectElems);
+
+ 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_TNodeXYZ( face->GetNode(i) ));
+ if( HasIntersection(P, PC, Pres, aContour) ) {
+ res = true;
+ double tmp = PC.Distance(Pres);
+ if(tmp<dist) {
+ Pint = Pres;
+ dist = tmp;
}
}
}
return res;
}
+//================================================================================
+/*!
+ * \brief Prepare data for the given face
+ * \param PN - coordinates of face nodes
+ * \param VN - cross products of vectors (PC-PN(i)) ^ (PC-PN(i+1))
+ * \param FNodes - face nodes
+ * \param PC - gravity center of nodes
+ * \param VNorm - face normal (sum of VN)
+ * \param volumes - two volumes sharing the given face, the first is in VNorm direction
+ * \retval int - 0 if given face is not quad,
+ * 1 if given face is quad,
+ * 2 if given face is degenerate quad (two nodes are coincided)
+ */
+//================================================================================
-//=======================================================================
-//function : CompareTrias
-//purpose : Auxilare for Compute()
-//=======================================================================
-static bool CompareTrias(const SMDS_MeshElement* F1,const SMDS_MeshElement* F2)
-{
- SMDS_ElemIteratorPtr nIt = F1->nodesIterator();
- const SMDS_MeshNode* Ns1[3];
- int k = 0;
- while( nIt->more() ) {
- Ns1[k] = static_cast<const SMDS_MeshNode*>( nIt->next() );
- k++;
- }
- nIt = F2->nodesIterator();
- const SMDS_MeshNode* Ns2[3];
- k = 0;
- while( nIt->more() ) {
- Ns2[k] = static_cast<const SMDS_MeshNode*>( nIt->next() );
- k++;
- }
- if( ( Ns1[1]==Ns2[1] && Ns1[2]==Ns2[2] ) ||
- ( Ns1[1]==Ns2[2] && Ns1[2]==Ns2[1] ) )
- return true;
- return false;
-}
-
-
-//=======================================================================
-//function : IsDegenarate
-//purpose : Auxilare for Preparation()
-//=======================================================================
-static int IsDegenarate(const Handle(TColgp_HArray1OfPnt)& PN)
+int StdMeshers_QuadToTriaAdaptor::Preparation(const SMDS_MeshElement* face,
+ Handle(TColgp_HArray1OfPnt)& PN,
+ Handle(TColgp_HArray1OfVec)& VN,
+ vector<const SMDS_MeshNode*>& FNodes,
+ gp_Pnt& PC,
+ gp_Vec& VNorm,
+ const SMDS_MeshElement** volumes)
{
- int i = 1;
- for(; i<4; i++) {
- int j = i+1;
- for(; j<=4; j++) {
- if( PN->Value(i).Distance(PN->Value(j)) < 1.e-6 )
- return j;
- }
+ if( face->NbCornerNodes() != 4 )
+ {
+ return NOT_QUAD;
}
- return 0;
-}
-
-//=======================================================================
-//function : Preparation
-//purpose : Auxilare for Compute()
-// : Return 0 if given face is not quad,
-// 1 if given face is quad,
-// 2 if given face is degenerate quad (two nodes are coincided)
-//=======================================================================
-int StdMeshers_QuadToTriaAdaptor::Preparation(const SMDS_MeshElement* face,
- Handle(TColgp_HArray1OfPnt) PN,
- Handle(TColgp_HArray1OfVec) VN,
- std::vector<const SMDS_MeshNode*>& FNodes,
- gp_Pnt& PC, gp_Vec& VNorm)
-{
int i = 0;
- double xc=0., yc=0., zc=0.;
- SMDS_ElemIteratorPtr nodeIt = face->nodesIterator();
- if( !face->IsQuadratic() ) {
- if( face->NbNodes() != 4 )
- return 0;
- while ( nodeIt->more() ) {
- i++;
- const SMDS_MeshNode* node = static_cast<const SMDS_MeshNode*>( nodeIt->next() );
- FNodes[i-1] = node;
- PN->SetValue( i, gp_Pnt(node->X(), node->Y(), node->Z()) );
- xc += node->X();
- yc += node->Y();
- zc += node->Z();
- }
- }
- else {
- if( face->NbNodes() != 8)
- return 0;
- while ( nodeIt->more() ) {
- i++;
- const SMDS_MeshNode* node = static_cast<const SMDS_MeshNode*>( nodeIt->next() );
- FNodes[i-1] = node;
- PN->SetValue( i, gp_Pnt(node->X(), node->Y(), node->Z()) );
- xc += node->X();
- yc += node->Y();
- zc += node->Z();
- if(i==4) break;
- }
+ gp_XYZ xyzC(0., 0., 0.);
+ for ( i = 0; i < 4; ++i )
+ {
+ gp_XYZ p = SMESH_TNodeXYZ( FNodes[i] = face->GetNode(i) );
+ PN->SetValue( i+1, p );
+ xyzC += p;
}
+ PC = xyzC/4;
int nbp = 4;
hasdeg = true;
gp_Pnt Pdeg = PN->Value(i);
- std::list< const SMDS_MeshNode* >::iterator itdg = myDegNodes.begin();
+ list< const SMDS_MeshNode* >::iterator itdg = myDegNodes.begin();
const SMDS_MeshNode* DegNode = 0;
for(; itdg!=myDegNodes.end(); itdg++) {
const SMDS_MeshNode* N = (*itdg);
FNodes[i-1] = FNodes[i];
}
nbp = 3;
- //PC = gp_Pnt( PN->Value(1).X() + PN.Value
}
- PC = gp_Pnt(xc/4., yc/4., zc/4.);
- //cout<<" PC("<<PC.X()<<","<<PC.Y()<<","<<PC.Z()<<")"<<endl;
-
- //PN->SetValue(5,PN->Value(1));
PN->SetValue(nbp+1,PN->Value(1));
- //FNodes[4] = FNodes[0];
FNodes[nbp] = FNodes[0];
// find normal direction
- //gp_Vec V1(PC,PN->Value(4));
gp_Vec V1(PC,PN->Value(nbp));
gp_Vec V2(PC,PN->Value(1));
VNorm = V1.Crossed(V2);
- //VN->SetValue(4,VNorm);
VN->SetValue(nbp,VNorm);
- //for(i=1; i<4; i++) {
for(i=1; i<nbp; i++) {
V1 = gp_Vec(PC,PN->Value(i));
V2 = gp_Vec(PC,PN->Value(i+1));
VN->SetValue(i,Vtmp);
VNorm += Vtmp;
}
+
+ // find volumes sharing the face
+ if ( volumes )
+ {
+ volumes[0] = volumes[1] = 0;
+ SMDS_ElemIteratorPtr vIt = FNodes[0]->GetInverseElementIterator( SMDSAbs_Volume );
+ while ( vIt->more() )
+ {
+ const SMDS_MeshElement* vol = vIt->next();
+ bool volSharesAllNodes = true;
+ for ( int i = 1; i < face->NbNodes() && volSharesAllNodes; ++i )
+ volSharesAllNodes = ( vol->GetNodeIndex( FNodes[i] ) >= 0 );
+ if ( volSharesAllNodes )
+ volumes[ volumes[0] ? 1 : 0 ] = vol;
+ // we could additionally check that vol has all FNodes in its one face using SMDS_VolumeTool
+ }
+ // define volume position relating to the face normal
+ if ( volumes[0] )
+ {
+ // get volume gc
+ SMDS_ElemIteratorPtr nodeIt = volumes[0]->nodesIterator();
+ gp_XYZ volGC(0,0,0);
+ volGC = accumulate( TXyzIterator(nodeIt), TXyzIterator(), volGC ) / volumes[0]->NbNodes();
+
+ if ( VNorm * gp_Vec( PC, volGC ) < 0 )
+ swap( volumes[0], volumes[1] );
+ }
+ }
+
//cout<<" VNorm("<<VNorm.X()<<","<<VNorm.Y()<<","<<VNorm.Z()<<")"<<endl;
- if(hasdeg) return 2;
- return 1;
+ return hasdeg ? DEGEN_QUAD : QUAD;
}
//=======================================================================
//function : Compute
-//purpose :
+//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();
- myMapFPyram.clear();
+ SMESH_ProxyMesh::setMesh( aMesh );
- SMESHDS_Mesh * meshDS = aMesh.GetMeshDS();
+ if ( aShape.ShapeType() != TopAbs_SOLID &&
+ aShape.ShapeType() != TopAbs_SHELL )
+ return false;
+
+ myShape = aShape;
+
+ vector<const SMDS_MeshElement*> myPyramids;
- for (TopExp_Explorer exp(aShape,TopAbs_FACE);exp.More();exp.Next()) {
+ SMESHDS_Mesh * meshDS = aMesh.GetMeshDS();
+ SMESH_MesherHelper helper(aMesh);
+ helper.IsQuadraticSubMesh(aShape);
+ helper.SetElementsOnShape( true );
+
+ if ( myElemSearcher ) delete myElemSearcher;
+ if ( aProxyMesh )
+ myElemSearcher = SMESH_MeshAlgos::GetElementSearcher( *meshDS, aProxyMesh->GetFaces(aShape));
+ else
+ myElemSearcher = SMESH_MeshAlgos::GetElementSearcher( *meshDS );
+
+ 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 ( aSubMeshDSFace ) {
- bool isRev = SMESH_Algo::IsReversedSubMesh( TopoDS::Face(aShapeFace), meshDS );
+ if ( aProxyMesh )
+ aSubMeshDSFace = aProxyMesh->GetSubMesh( aShapeFace );
+ else
+ aSubMeshDSFace = meshDS->MeshElements( aShapeFace );
+
+ vector<const SMDS_MeshElement*> trias, quads;
+ bool hasNewTrias = false;
+
+ if ( aSubMeshDSFace )
+ {
+ bool isRev = false;
+ if ( helper.NbAncestors( aShapeFace, aMesh, aShape.ShapeType() ) > 1 )
+ isRev = helper.IsReversedSubMesh( TopoDS::Face(aShapeFace) );
SMDS_ElemIteratorPtr iteratorElem = aSubMeshDSFace->GetElements();
- while ( iteratorElem->more() ) { // loop on elements on a face
+ 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);
- std::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;
+ // preparation step to get face info
+ int stat = Preparation(face, PN, VN, FNodes, PC, VNorm);
+ switch ( stat )
+ {
+ case NOT_QUAD:
- if(stat==2) {
- // degenerate face
- // add triangles to result map
- std::list<const SMDS_FaceOfNodes*> aList;
- SMDS_FaceOfNodes* NewFace;
- if(!isRev)
- NewFace = new SMDS_FaceOfNodes( FNodes[0], FNodes[1], FNodes[2] );
- else
- NewFace = new SMDS_FaceOfNodes( FNodes[0], FNodes[2], FNodes[1] );
- aList.push_back(NewFace);
- myResMap.insert(make_pair(face,aList));
- continue;
- }
+ trias.push_back( face );
+ break;
- 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 = gp_Pnt( PC.X() + VNorm.X()*0.001,
- PC.Y() + VNorm.Y()*0.001,
- PC.Z() + VNorm.Z()*0.001);
- }
- else {
- // check possible intersection with other faces
- gp_Pnt Pint;
- bool check = CheckIntersection(PCbest, PC, Pint, aMesh, aShape, aShapeFace);
- 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 = gp_Pnt( PC.X() + aDir.X()*dist,
- PC.Y() + aDir.Y()*dist,
- PC.Z() + aDir.Z()*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.X()+VB.X()*3, PC.X()+VB.X()*3, PC.X()+VB.X()*3);
- bool check = CheckIntersection(PCbestTmp, PC, Pint, aMesh, aShape, aShapeFace);
- 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 = gp_Pnt( PC.X() + aDir.X()*dist,
- PC.Y() + aDir.Y()*dist,
- PC.Z() + aDir.Z()*dist );
+ 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 = meshDS->AddNode( PCbest.X(), PCbest.Y(), PCbest.Z() );
- // add triangles to result map
- std::list<const SMDS_FaceOfNodes*> aList;
- for(i=0; i<4; i++) {
- SMDS_FaceOfNodes* NewFace = new SMDS_FaceOfNodes( NewNode, FNodes[i], FNodes[i+1] );
- aList.push_back(NewFace);
+ // 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);
+
+ quads.push_back( face );
+ hasNewTrias = true;
+ break;
+
+ } // 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_MeshAlgos::GetElementSearcher( *meshDS, aProxyMesh->GetFaces(aShape));
}
- myResMap.insert(make_pair(face,aList));
- // create pyramid
- SMDS_MeshVolume* aPyram =
- meshDS->AddVolume( FNodes[0], FNodes[1], FNodes[2], FNodes[3], NewNode );
- myMapFPyram.insert(make_pair(face,aPyram));
- } // end loop on elements on a face
+ }
}
} // end for(TopExp_Explorer exp(aShape,TopAbs_FACE);exp.More();exp.Next()) {
- return Compute2ndPart(aMesh);
+ return Compute2ndPart(aMesh, myPyramids);
}
-
-//=======================================================================
-//function : Compute
-//purpose :
-//=======================================================================
+//================================================================================
+/*!
+ * \brief Computes pyramids in mesh with no shape
+ */
+//================================================================================
bool StdMeshers_QuadToTriaAdaptor::Compute(SMESH_Mesh& aMesh)
{
- myResMap.clear();
- myMapFPyram.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;
+
+ // find if there is a group of faces identified as skin faces, with normal going outside the volume
+ std::string groupName = "skinFaces";
+ SMESHDS_GroupBase* groupDS = 0;
+ SMESH_Mesh::GroupIteratorPtr groupIt = aMesh.GetGroups();
+ while ( groupIt->more() )
+ {
+ groupDS = 0;
+ SMESH_Group * group = groupIt->next();
+ if ( !group ) continue;
+ groupDS = group->GetGroupDS();
+ if ( !groupDS || groupDS->IsEmpty() )
+ {
+ groupDS = 0;
+ continue;
+ }
+ if (groupDS->GetType() != SMDSAbs_Face)
+ {
+ groupDS = 0;
+ continue;
+ }
+ std::string grpName = group->GetName();
+ if (grpName == groupName)
+ {
+ MESSAGE("group skinFaces provided");
+ break;
+ }
+ else
+ groupDS = 0;
+ }
+
+ vector<const SMDS_MeshElement*> myPyramids;
+ SMESH_MesherHelper helper(aMesh);
+ helper.IsQuadraticSubMesh(aMesh.GetShapeToMesh());
+ helper.SetElementsOnShape( true );
SMESHDS_Mesh * meshDS = aMesh.GetMeshDS();
+ SMESH_ProxyMesh::SubMesh* prxSubMesh = getProxySubMesh();
- SMDS_FaceIteratorPtr itFace = meshDS->facesIterator();
+ if ( !myElemSearcher )
+ myElemSearcher = SMESH_MeshAlgos::GetElementSearcher( *meshDS );
+ SMESH_ElementSearcher* searcher = const_cast<SMESH_ElementSearcher*>(myElemSearcher);
- while(itFace->more()) {
- const SMDS_MeshElement* face = itFace->next();
+ 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;
- // preparation step using face info
+ // retrieve needed information about a face
Handle(TColgp_HArray1OfPnt) PN = new TColgp_HArray1OfPnt(1,5);
Handle(TColgp_HArray1OfVec) VN = new TColgp_HArray1OfVec(1,4);
- std::vector<const SMDS_MeshNode*> FNodes(5);
+ vector<const SMDS_MeshNode*> FNodes(5);
gp_Pnt PC;
gp_Vec VNorm;
-
- int stat = Preparation(face, PN, VN, FNodes, PC, VNorm);
- if(stat==0)
+ const SMDS_MeshElement* volumes[2];
+ int what = Preparation(face, PN, VN, FNodes, PC, VNorm, volumes);
+ if ( what == NOT_QUAD )
continue;
+ if ( volumes[0] && volumes[1] )
+ continue; // face is shared by two volumes - no space for a pyramid
- if(stat==2) {
+ if ( what == DEGEN_QUAD )
+ {
// degenerate face
- // add triangles to result map
- std::list<const SMDS_FaceOfNodes*> aList;
- SMDS_FaceOfNodes* NewFace;
- // check orientation
+ // add a triangle to the proxy mesh
+ SMDS_MeshFace* NewFace;
- double tmp = PN->Value(1).Distance(PN->Value(2)) +
- PN->Value(2).Distance(PN->Value(3));
- gp_Dir tmpDir(VNorm);
- gp_Pnt Ptmp1( PC.X() + tmpDir.X()*tmp*1.e6,
- PC.Y() + tmpDir.Y()*tmp*1.e6,
- PC.Z() + tmpDir.Z()*tmp*1.e6 );
- gp_Pnt Ptmp2( PC.X() + tmpDir.Reversed().X()*tmp*1.e6,
- PC.Y() + tmpDir.Reversed().Y()*tmp*1.e6,
- PC.Z() + tmpDir.Reversed().Z()*tmp*1.e6 );
+ // 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;
+ gp_Pnt Ptmp2 = PC.XYZ() - VNorm.XYZ() * tmp * 1.e6;
// check intersection for Ptmp1 and Ptmp2
bool IsRev = false;
bool IsOK1 = false;
double dist1 = RealLast();
double dist2 = RealLast();
gp_Pnt Pres1,Pres2;
- SMDS_FaceIteratorPtr itf = meshDS->facesIterator();
- while(itf->more()) {
- const SMDS_MeshElement* F = itf->next();
+
+ gp_Ax1 line( PC, VNorm );
+ vector< const SMDS_MeshElement* > suspectElems;
+ searcher->GetElementsNearLine( line, SMDSAbs_Face, suspectElems);
+
+ for ( int iF = 0; iF < suspectElems.size(); ++iF ) {
+ const SMDS_MeshElement* F = suspectElems[iF];
if(F==face) continue;
Handle(TColgp_HSequenceOfPnt) aContour = new TColgp_HSequenceOfPnt;
- SMDS_ElemIteratorPtr nodeIt = F->nodesIterator();
- if( !F->IsQuadratic() ) {
- while ( nodeIt->more() ) {
- const SMDS_MeshNode* node = static_cast<const SMDS_MeshNode*>( nodeIt->next() );
- aContour->Append(gp_Pnt(node->X(), node->Y(), node->Z()));
- }
- }
- else {
- int nn = 0;
- while ( nodeIt->more() ) {
- nn++;
- const SMDS_MeshNode* node = static_cast<const SMDS_MeshNode*>( nodeIt->next() );
- aContour->Append(gp_Pnt(node->X(), node->Y(), node->Z()));
- if(nn==face->NbNodes()/2) break;
- }
- }
+ for ( int i = 0; i < 4; ++i )
+ aContour->Append( SMESH_TNodeXYZ( F->GetNode(i) ));
gp_Pnt PPP;
- if( HasIntersection(Ptmp1, PC, PPP, aContour) ) {
+ if( !volumes[0] && HasIntersection(Ptmp1, PC, PPP, aContour) ) {
IsOK1 = true;
double tmp = PC.Distance(PPP);
if(tmp<dist1) {
dist1 = tmp;
}
}
- if( HasIntersection(Ptmp2, PC, PPP, aContour) ) {
+ if( !volumes[1] && HasIntersection(Ptmp2, PC, PPP, aContour) ) {
IsOK2 = true;
double tmp = PC.Distance(PPP);
if(tmp<dist2) {
IsRev = true;
}
else { // IsOK1 && IsOK2
- double tmp1 = PC.Distance(Pres1)/3.;
- double tmp2 = PC.Distance(Pres2)/3.;
+ double tmp1 = PC.Distance(Pres1);
+ double tmp2 = PC.Distance(Pres2);
if(tmp1<tmp2) {
// using existed direction
}
}
}
if(!IsRev)
- NewFace = new SMDS_FaceOfNodes( FNodes[0], FNodes[1], FNodes[2] );
+ NewFace = meshDS->AddFace( FNodes[0], FNodes[1], FNodes[2] );
else
- NewFace = new SMDS_FaceOfNodes( 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;
}
-
- double xc = 0., yc = 0., zc = 0.;
+
+ // Case of non-degenerated quadrangle
+
+ // Find pyramid peak
+
+ gp_XYZ PCbest(0., 0., 0.); // pyramid peak
int i = 1;
for(; i<=4; i++) {
gp_Pnt Pbest = FindBestPoint(PN->Value(i), PN->Value(i+1), PC, VN->Value(i));
- xc += Pbest.X();
- yc += Pbest.Y();
- zc += Pbest.Z();
+ PCbest += Pbest.XYZ();
}
- gp_Pnt PCbest(xc/4., yc/4., zc/4.);
- double height = PCbest.Distance(PC);
- if(height<1.e-6) {
+ PCbest /= 4;
+
+ double height = PC.Distance(PCbest); // pyramid height to precise
+ if ( height < 1.e-6 ) {
// create new PCbest using a bit shift along VNorm
- PCbest = gp_Pnt( PC.X() + VNorm.X()*0.001,
- PC.Y() + VNorm.Y()*0.001,
- PC.Z() + VNorm.Z()*0.001);
- height = PCbest.Distance(PC);
+ PCbest = PC.XYZ() + VNorm.XYZ() * 0.001;
+ height = PC.Distance(PCbest);
+ if ( height < std::numeric_limits<double>::min() )
+ return false; // batterfly element
}
- //cout<<" PCbest("<<PCbest.X()<<","<<PCbest.Y()<<","<<PCbest.Z()<<")"<<endl;
-
- gp_Vec V1(PC,PCbest);
- double tmp = PN->Value(1).Distance(PN->Value(3)) +
- PN->Value(2).Distance(PN->Value(4));
- gp_Dir tmpDir(V1);
- gp_Pnt Ptmp1( PC.X() + tmpDir.X()*tmp*1.e6,
- PC.Y() + tmpDir.Y()*tmp*1.e6,
- PC.Z() + tmpDir.Z()*tmp*1.e6 );
- gp_Pnt Ptmp2( PC.X() + tmpDir.Reversed().X()*tmp*1.e6,
- PC.Y() + tmpDir.Reversed().Y()*tmp*1.e6,
- PC.Z() + tmpDir.Reversed().Z()*tmp*1.e6 );
- // check intersection for Ptmp1 and Ptmp2
- bool IsRev = false;
- bool IsOK1 = false;
- bool IsOK2 = false;
- double dist1 = RealLast();
- double dist2 = RealLast();
- gp_Pnt Pres1,Pres2;
- SMDS_FaceIteratorPtr itf = meshDS->facesIterator();
- while(itf->more()) {
- const SMDS_MeshElement* F = itf->next();
+
+ // Restrict pyramid height by intersection with other faces
+ gp_Vec tmpDir(PC,PCbest); tmpDir.Normalize();
+ double tmp = PN->Value(1).Distance(PN->Value(3)) + PN->Value(2).Distance(PN->Value(4));
+ // far points: in (PC, PCbest) direction and vice-versa
+ gp_Pnt farPnt[2] = { PC.XYZ() + tmpDir.XYZ() * tmp * 1.e6,
+ PC.XYZ() - tmpDir.XYZ() * tmp * 1.e6 };
+ // check intersection for farPnt1 and farPnt2
+ bool intersected[2] = { false, false };
+ double dist [2] = { RealLast(), RealLast() };
+ gp_Pnt intPnt[2];
+
+ gp_Ax1 line( PC, tmpDir );
+ vector< const SMDS_MeshElement* > suspectElems;
+ searcher->GetElementsNearLine( line, SMDSAbs_Face, suspectElems);
+
+ for ( int iF = 0; iF < suspectElems.size(); ++iF )
+ {
+ const SMDS_MeshElement* F = suspectElems[iF];
if(F==face) continue;
Handle(TColgp_HSequenceOfPnt) aContour = new TColgp_HSequenceOfPnt;
- SMDS_ElemIteratorPtr nodeIt = F->nodesIterator();
- if( !F->IsQuadratic() ) {
- while ( nodeIt->more() ) {
- const SMDS_MeshNode* node = static_cast<const SMDS_MeshNode*>( nodeIt->next() );
- aContour->Append(gp_Pnt(node->X(), node->Y(), node->Z()));
- }
- }
- else {
- int nn = 0;
- while ( nodeIt->more() ) {
- nn++;
- const SMDS_MeshNode* node = static_cast<const SMDS_MeshNode*>( nodeIt->next() );
- aContour->Append(gp_Pnt(node->X(), node->Y(), node->Z()));
- if(nn==face->NbNodes()/2) break;
- }
- }
- gp_Pnt PPP;
- if( HasIntersection(Ptmp1, PC, PPP, aContour) ) {
- IsOK1 = true;
- double tmp = PC.Distance(PPP);
- if(tmp<dist1) {
- Pres1 = PPP;
- dist1 = tmp;
- }
- }
- if( HasIntersection(Ptmp2, PC, PPP, aContour) ) {
- IsOK2 = true;
- double tmp = PC.Distance(PPP);
- if(tmp<dist2) {
- Pres2 = PPP;
- dist2 = tmp;
+ int nbN = F->NbNodes() / ( F->IsQuadratic() ? 2 : 1 );
+ for ( i = 0; i < nbN; ++i )
+ aContour->Append( SMESH_TNodeXYZ( F->GetNode(i) ));
+ gp_Pnt intP;
+ for ( int isRev = 0; isRev < 2; ++isRev )
+ {
+ if( !volumes[isRev] && HasIntersection(farPnt[isRev], PC, intP, aContour) ) {
+ intersected[isRev] = true;
+ double d = PC.Distance( intP );
+ if( d < dist[isRev] )
+ {
+ intPnt[isRev] = intP;
+ dist [isRev] = d;
+ }
}
}
}
- if( IsOK1 && !IsOK2 ) {
- // using existed direction
- double tmp = PC.Distance(Pres1)/3.;
- if( height > tmp ) {
- height = tmp;
- PCbest = gp_Pnt( PC.X() + tmpDir.X()*height,
- PC.Y() + tmpDir.Y()*height,
- PC.Z() + tmpDir.Z()*height );
- }
+ // if the face belong to the group of skinFaces, do not build a pyramid outside
+ if (groupDS && groupDS->Contains(face))
+ {
+ intersected[0] = false;
}
- else if( !IsOK1 && IsOK2 ) {
- // using opposite direction
- IsRev = true;
- double tmp = PC.Distance(Pres2)/3.;
- if( height > tmp ) height = tmp;
- PCbest = gp_Pnt( PC.X() + tmpDir.Reversed().X()*height,
- PC.Y() + tmpDir.Reversed().Y()*height,
- PC.Z() + tmpDir.Reversed().Z()*height );
- }
- else { // IsOK1 && IsOK2
- double tmp1 = PC.Distance(Pres1)/3.;
- double tmp2 = PC.Distance(Pres2)/3.;
- if(tmp1<tmp2) {
- // using existed direction
- if( height > tmp1 ) {
- height = tmp1;
- PCbest = gp_Pnt( PC.X() + tmpDir.X()*height,
- PC.Y() + tmpDir.Y()*height,
- PC.Z() + tmpDir.Z()*height );
- }
- }
- else {
- // using opposite direction
- IsRev = true;
- if( height > tmp2 ) height = tmp2;
- PCbest = gp_Pnt( PC.X() + tmpDir.Reversed().X()*height,
- PC.Y() + tmpDir.Reversed().Y()*height,
- PC.Z() + tmpDir.Reversed().Z()*height );
+ else if ( intersected[0] && intersected[1] ) // check if one of pyramids is in a hole
+ {
+ gp_Pnt P ( PC.XYZ() + tmpDir.XYZ() * 0.5 * PC.Distance( intPnt[0] ));
+ if ( searcher->GetPointState( P ) == TopAbs_OUT )
+ intersected[0] = false;
+ else
+ {
+ P = ( PC.XYZ() - tmpDir.XYZ() * 0.5 * PC.Distance( intPnt[1] ));
+ if ( searcher->GetPointState( P ) == TopAbs_OUT )
+ intersected[1] = false;
}
}
- // create node for PCbest
- SMDS_MeshNode* NewNode = meshDS->AddNode( PCbest.X(), PCbest.Y(), PCbest.Z() );
- // add triangles to result map
- std::list<const SMDS_FaceOfNodes*> aList;
- for(i=0; i<4; i++) {
- SMDS_FaceOfNodes* NewFace;
- if(IsRev)
- NewFace = new SMDS_FaceOfNodes( NewNode, FNodes[i], FNodes[i+1] );
+ // Create one or two pyramids
+
+ for ( int isRev = 0; isRev < 2; ++isRev )
+ {
+ if( !intersected[isRev] ) continue;
+ double pyramidH = Min( height, PC.Distance(intPnt[isRev])/3.);
+ PCbest = PC.XYZ() + tmpDir.XYZ() * (isRev ? -pyramidH : pyramidH);
+
+ // 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++) {
+ SMDS_MeshFace* NewFace;
+ if(isRev)
+ NewFace = meshDS->AddFace( NewNode, FNodes[i], FNodes[i+1] );
+ else
+ NewFace = meshDS->AddFace( NewNode, FNodes[i+1], FNodes[i] );
+ storeTmpElement( NewFace );
+ prxSubMesh->AddElement( NewFace );
+ }
+ // create a pyramid
+ SMDS_MeshVolume* aPyram;
+ if(isRev)
+ aPyram = helper.AddVolume( FNodes[0], FNodes[1], FNodes[2], FNodes[3], NewNode );
else
- NewFace = new SMDS_FaceOfNodes( NewNode, FNodes[i+1], FNodes[i] );
- aList.push_back(NewFace);
+ aPyram = helper.AddVolume( FNodes[0], FNodes[3], FNodes[2], FNodes[1], NewNode );
+ myPyramids.push_back(aPyram);
}
- myResMap.insert(make_pair(face,aList));
- // create pyramid
- SMDS_MeshVolume* aPyram;
- if(IsRev)
- aPyram = meshDS->AddVolume( FNodes[0], FNodes[1], FNodes[2], FNodes[3], NewNode );
- else
- aPyram = meshDS->AddVolume( FNodes[0], FNodes[3], FNodes[2], FNodes[1], NewNode );
- myMapFPyram.insert(make_pair(face,aPyram));
- } // end loop on elements on a face
+ } // end loop on all faces
- return Compute2ndPart(aMesh);
+ return Compute2ndPart(aMesh, myPyramids);
}
+//================================================================================
+/*!
+ * \brief Update created pyramids and faces to avoid their intersection
+ */
+//================================================================================
-//=======================================================================
-//function : Compute2ndPart
-//purpose :
-//=======================================================================
-
-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)->getshapeId();
- // check intersections between created pyramids
- int NbPyram = myMapFPyram.size();
- //cout<<"NbPyram = "<<NbPyram<<endl;
- if(NbPyram==0)
- return true;
+ if ( myElemSearcher ) delete myElemSearcher;
+ myElemSearcher = SMESH_MeshAlgos::GetElementSearcher( *meshDS );
+ SMESH_ElementSearcher* searcher = const_cast<SMESH_ElementSearcher*>(myElemSearcher);
- std::vector< const SMDS_MeshElement* > Pyrams(NbPyram);
- std::vector< const SMDS_MeshElement* > Faces(NbPyram);
- std::map< const SMDS_MeshElement*,
- const SMDS_MeshElement* >::iterator itp = myMapFPyram.begin();
- int i = 0;
- for(; itp!=myMapFPyram.end(); itp++, i++) {
- Faces[i] = (*itp).first;
- Pyrams[i] = (*itp).second;
- }
- StdMeshers_Array1OfSequenceOfInteger MergesInfo(0,NbPyram-1);
- for(i=0; i<NbPyram; i++) {
- TColStd_SequenceOfInteger aMerges;
- aMerges.Append(i);
- MergesInfo.SetValue(i,aMerges);
+ set<const SMDS_MeshNode*> nodesToMove;
+
+ // check adjacent pyramids
+
+ for ( i = 0; i < myPyramids.size(); ++i )
+ {
+ const SMDS_MeshElement* PrmI = myPyramids[i];
+ MergeAdjacent( PrmI, nodesToMove );
}
- for(i=0; i<NbPyram-1; i++) {
- const SMDS_MeshElement* Prm1 = Pyrams[i];
- SMDS_ElemIteratorPtr nIt = Prm1->nodesIterator();
- std::vector<gp_Pnt> Ps1(5);
- const SMDS_MeshNode* Ns1[5];
- int k = 0;
- while( nIt->more() ) {
- const SMDS_MeshNode* node = static_cast<const SMDS_MeshNode*>( nIt->next() );
- Ns1[k] = node;
- Ps1[k] = gp_Pnt(node->X(), node->Y(), node->Z());
- k++;
- }
- bool NeedMove = false;
- for(int j=i+1; j<NbPyram; j++) {
- //cout<<" i="<<i<<" j="<<j<<endl;
- const TColStd_SequenceOfInteger& aMergesI = MergesInfo.Value(i);
- int nbI = aMergesI.Length();
- const TColStd_SequenceOfInteger& aMergesJ = MergesInfo.Value(j);
- int nbJ = aMergesJ.Length();
-
- int k = 2;
- bool NeedCont = false;
- for(; k<=nbI; k++) {
- if(aMergesI.Value(k)==j) {
- NeedCont = true;
- break;
- }
- }
- if(NeedCont) continue;
-
- const SMDS_MeshElement* Prm2 = Pyrams[j];
- nIt = Prm2->nodesIterator();
- std::vector<gp_Pnt> Ps2(5);
- const SMDS_MeshNode* Ns2[5];
- k = 0;
- while( nIt->more() ) {
- const SMDS_MeshNode* node = static_cast<const SMDS_MeshNode*>( nIt->next() );
- Ns2[k] = node;
- Ps2[k] = gp_Pnt(node->X(), node->Y(), node->Z());
- k++;
+
+ // iterate on all pyramids
+ for ( i = 0; i < myPyramids.size(); ++i )
+ {
+ const SMDS_MeshElement* PrmI = myPyramids[i];
+
+ // compare PrmI with all the rest pyramids
+
+ // collect adjacent pyramids and nodes coordinates of PrmI
+ set<const SMDS_MeshElement*> checkedPyrams;
+ vector<gp_Pnt> PsI(5);
+ for(k=0; k<5; k++) // loop on 4 base nodes of PrmI
+ {
+ const SMDS_MeshNode* n = PrmI->GetNode(k);
+ PsI[k] = SMESH_TNodeXYZ( n );
+ SMDS_ElemIteratorPtr vIt = n->GetInverseElementIterator( SMDSAbs_Volume );
+ while ( vIt->more() )
+ {
+ const SMDS_MeshElement* PrmJ = vIt->next();
+ if ( SMESH_MeshAlgos::GetCommonNodes( PrmI, PrmJ ).size() > 1 )
+ checkedPyrams.insert( PrmJ );
}
+ }
- bool hasInt = false;
- gp_Pnt Pint;
- for(k=0; k<4; k++) {
- gp_Vec Vtmp(Ps1[k],Ps1[4]);
- gp_Pnt Pshift( Ps1[k].X() + Vtmp.X()*0.01,
- Ps1[k].Y() + Vtmp.Y()*0.01,
- Ps1[k].Z() + Vtmp.Z()*0.01 );
- int m=0;
- for(; m<3; m++) {
- if( HasIntersection3( Pshift, Ps1[4], Pint, Ps2[m], Ps2[m+1], Ps2[4]) ) {
- hasInt = true;
- break;
- }
- }
- if( HasIntersection3( Pshift, Ps1[4], Pint, Ps2[3], Ps2[0], Ps2[4]) ) {
- hasInt = true;
+ // 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_Ax1 line( PsI[k], Vtmp );
+ vector< const SMDS_MeshElement* > suspectPyrams;
+ searcher->GetElementsNearLine( line, SMDSAbs_Volume, suspectPyrams);
+
+ for ( j = 0; j < suspectPyrams.size(); ++j )
+ {
+ const SMDS_MeshElement* PrmJ = suspectPyrams[j];
+ if ( PrmJ == PrmI || PrmJ->NbCornerNodes() != 5 )
+ continue;
+ 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
+ if ( !checkedPyrams.insert( PrmJ ).second )
+ continue; // already checked
+
+ TXyzIterator xyzIt( PrmJ->nodesIterator() );
+ vector<gp_Pnt> PsJ( xyzIt, TXyzIterator() );
+
+ gp_Pnt Pint;
+ 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]) );
}
- if(hasInt) break;
- }
- if(!hasInt) {
- for(k=0; k<4; k++) {
- gp_Vec Vtmp(Ps2[k],Ps2[4]);
- gp_Pnt Pshift( Ps2[k].X() + Vtmp.X()*0.01,
- Ps2[k].Y() + Vtmp.Y()*0.01,
- Ps2[k].Z() + Vtmp.Z()*0.01 );
- int m=0;
- for(; m<3; m++) {
- if( HasIntersection3( Pshift, Ps2[4], Pint, Ps1[m], Ps1[m+1], Ps1[4]) ) {
- hasInt = true;
- break;
- }
- }
- if( HasIntersection3( Pshift, Ps2[4], Pint, Ps1[3], Ps1[0], Ps1[4]) ) {
- hasInt = true;
- }
- if(hasInt) break;
+ for(k=0; k<4 && !hasInt; k++) {
+ gp_Vec Vtmp(PsJ[k],PsJ[4]);
+ gp_Pnt Pshift = PsJ[k].XYZ() + Vtmp.XYZ() * 0.01;
+ hasInt =
+ ( HasIntersection3( Pshift, PsJ[4], Pint, PsI[0], PsI[1], PsI[4]) ||
+ HasIntersection3( Pshift, PsJ[4], Pint, PsI[1], PsI[2], PsI[4]) ||
+ HasIntersection3( Pshift, PsJ[4], Pint, PsI[2], PsI[3], PsI[4]) ||
+ HasIntersection3( Pshift, PsJ[4], Pint, PsI[3], PsI[0], PsI[4]) );
}
- }
- if(hasInt) {
- //cout<<" has intersec for i="<<i<<" j="<<j<<endl;
- // check if MeshFaces have 2 common node
- int nbc = 0;
- for(k=0; k<4; k++) {
- for(int m=0; m<4; m++) {
- if( Ns1[k]==Ns2[m] ) nbc++;
- }
- }
- //cout<<" nbc = "<<nbc<<endl;
- if(nbc>0) {
- // create common node
- SMDS_MeshNode* CommonNode = const_cast<SMDS_MeshNode*>(Ns1[4]);
- CommonNode->setXYZ( ( nbI*Ps1[4].X() + nbJ*Ps2[4].X() ) / (nbI+nbJ),
- ( nbI*Ps1[4].Y() + nbJ*Ps2[4].Y() ) / (nbI+nbJ),
- ( nbI*Ps1[4].Z() + nbJ*Ps2[4].Z() ) / (nbI+nbJ) );
- NeedMove = true;
- //cout<<" CommonNode: "<<CommonNode;
- const SMDS_MeshNode* Nrem = Ns2[4];
- Ns2[4] = CommonNode;
- meshDS->ChangeElementNodes(Prm2, Ns2, 5);
- // update pyramids for J
- for(k=2; k<=nbJ; k++) {
- const SMDS_MeshElement* tmpPrm = Pyrams[aMergesJ.Value(k)];
- SMDS_ElemIteratorPtr tmpIt = tmpPrm->nodesIterator();
- const SMDS_MeshNode* Ns[5];
- int m = 0;
- while( tmpIt->more() ) {
- Ns[m] = static_cast<const SMDS_MeshNode*>( tmpIt->next() );
- m++;
- }
- Ns[4] = CommonNode;
- meshDS->ChangeElementNodes(tmpPrm, Ns, 5);
- }
+ if ( hasInt )
+ {
+ // count common nodes of base faces of two pyramids
+ int nbc = 0;
+ for (k=0; k<4; k++)
+ nbc += int ( PrmI->GetNodeIndex( PrmJ->GetNode(k) ) >= 0 );
- // update MergesInfo
- for(k=1; k<=nbI; k++) {
- int num = aMergesI.Value(k);
- const TColStd_SequenceOfInteger& aSeq = MergesInfo.Value(num);
- TColStd_SequenceOfInteger tmpSeq;
- int m = 1;
- for(; m<=aSeq.Length(); m++) {
- tmpSeq.Append(aSeq.Value(m));
- }
- for(m=1; m<=nbJ; m++) {
- tmpSeq.Append(aMergesJ.Value(m));
- }
- MergesInfo.SetValue(num,tmpSeq);
- }
- for(k=1; k<=nbJ; k++) {
- int num = aMergesJ.Value(k);
- const TColStd_SequenceOfInteger& aSeq = MergesInfo.Value(num);
- TColStd_SequenceOfInteger tmpSeq;
- int m = 1;
- for(; m<=aSeq.Length(); m++) {
- tmpSeq.Append(aSeq.Value(m));
- }
- for(m=1; m<=nbI; m++) {
- tmpSeq.Append(aMergesI.Value(m));
- }
- MergesInfo.SetValue(num,tmpSeq);
- }
+ if ( nbc == 4 )
+ continue; // pyrams have a common base face
- // update triangles for aMergesJ
- for(k=1; k<=nbJ; k++) {
- std::list< std::list< const SMDS_MeshNode* > > aFNodes;
- std::list< const SMDS_MeshElement* > aFFaces;
- int num = aMergesJ.Value(k);
- std::map< const SMDS_MeshElement*,
- std::list<const SMDS_FaceOfNodes*> >::iterator itrm = myResMap.find(Faces[num]);
- std::list<const SMDS_FaceOfNodes*> trias = (*itrm).second;
- std::list<const SMDS_FaceOfNodes*>::iterator itt = trias.begin();
- for(; itt!=trias.end(); itt++) {
- int nn = -1;
- SMDS_ElemIteratorPtr nodeIt = (*itt)->nodesIterator();
- const SMDS_MeshNode* NF[3];
- while ( nodeIt->more() ) {
- nn++;
- NF[nn] = static_cast<const SMDS_MeshNode*>( nodeIt->next() );
- }
- NF[0] = CommonNode;
- SMDS_FaceOfNodes* Ftria = const_cast< SMDS_FaceOfNodes*>( (*itt) );
- Ftria->ChangeNodes(NF, 3);
- }
+ if(nbc>0)
+ {
+ // Merge the two pyramids and others already merged with them
+ MergePiramids( PrmI, PrmJ, nodesToMove );
}
+ else { // nbc==0
- // check and remove coincided faces
- TColStd_SequenceOfInteger IdRemovedTrias;
- int i1 = 1;
- for(; i1<=nbI; i1++) {
- int numI = aMergesI.Value(i1);
- std::map< const SMDS_MeshElement*,
- std::list<const SMDS_FaceOfNodes*> >::iterator itrmI = myResMap.find(Faces[numI]);
- std::list<const SMDS_FaceOfNodes*> triasI = (*itrmI).second;
- std::list<const SMDS_FaceOfNodes*>::iterator ittI = triasI.begin();
- int nbfI = triasI.size();
- std::vector<const SMDS_FaceOfNodes*> FsI(nbfI);
- k = 0;
- for(; ittI!=triasI.end(); ittI++) {
- FsI[k] = (*ittI);
- k++;
+ // decrease height of pyramids
+ gp_XYZ PCi(0,0,0), PCj(0,0,0);
+ for(k=0; k<4; k++) {
+ PCi += PsI[k].XYZ();
+ PCj += PsJ[k].XYZ();
}
- int i2 = 0;
- for(; i2<nbfI; i2++) {
- const SMDS_FaceOfNodes* FI = FsI[i2];
- if(FI==0) continue;
- int j1 = 1;
- for(; j1<=nbJ; j1++) {
- int numJ = aMergesJ.Value(j1);
- std::map< const SMDS_MeshElement*,
- std::list<const SMDS_FaceOfNodes*> >::iterator itrmJ = myResMap.find(Faces[numJ]);
- std::list<const SMDS_FaceOfNodes*> triasJ = (*itrmJ).second;
- std::list<const SMDS_FaceOfNodes*>::iterator ittJ = triasJ.begin();
- int nbfJ = triasJ.size();
- std::vector<const SMDS_FaceOfNodes*> FsJ(nbfJ);
- k = 0;
- for(; ittJ!=triasJ.end(); ittJ++) {
- FsJ[k] = (*ittJ);
- k++;
- }
- int j2 = 0;
- for(; j2<nbfJ; j2++) {
- const SMDS_FaceOfNodes* FJ = FsJ[j2];
- // compare triangles
- if( CompareTrias(FI,FJ) ) {
- IdRemovedTrias.Append( FI->GetID() );
- IdRemovedTrias.Append( FJ->GetID() );
- FsI[i2] = 0;
- FsJ[j2] = 0;
- std::list<const SMDS_FaceOfNodes*> new_triasI;
- for(k=0; k<nbfI; k++) {
- if( FsI[k]==0 ) continue;
- new_triasI.push_back( FsI[k] );
- }
- (*itrmI).second = new_triasI;
- triasI = new_triasI;
- std::list<const SMDS_FaceOfNodes*> new_triasJ;
- for(k=0; k<nbfJ; k++) {
- if( FsJ[k]==0 ) continue;
- new_triasJ.push_back( FsJ[k] );
- }
- (*itrmJ).second = new_triasJ;
- triasJ = new_triasJ;
- // remove faces
- delete FI;
- delete FJ;
- // close for j2 and j1
- j1 = nbJ;
- break;
- }
- } // j2
- } // j1
- } // i2
- } // i1
- // removing node
- meshDS->RemoveNode(Nrem);
- }
- else { // nbc==0
- //cout<<"decrease height of pyramids"<<endl;
- // decrease height of pyramids
- double xc1 = 0., yc1 = 0., zc1 = 0.;
- double xc2 = 0., yc2 = 0., zc2 = 0.;
- for(k=0; k<4; k++) {
- xc1 += Ps1[k].X();
- yc1 += Ps1[k].Y();
- zc1 += Ps1[k].Z();
- xc2 += Ps2[k].X();
- yc2 += Ps2[k].Y();
- zc2 += Ps2[k].Z();
+ PCi /= 4; PCj /= 4;
+ gp_Vec VN1(PCi,PsI[4]);
+ gp_Vec VN2(PCj,PsJ[4]);
+ gp_Vec VI1(PCi,Pint);
+ gp_Vec VI2(PCj,Pint);
+ double ang1 = fabs(VN1.Angle(VI1));
+ double ang2 = fabs(VN2.Angle(VI2));
+ double coef1 = 0.5 - (( ang1 < M_PI/3. ) ? cos(ang1)*0.25 : 0 );
+ double coef2 = 0.5 - (( ang2 < M_PI/3. ) ? cos(ang2)*0.25 : 0 ); // cos(ang2) ?
+// double coef2 = 0.5;
+// if(ang2<PI/3)
+// coef2 -= cos(ang1)*0.25;
+
+ VN1.Scale(coef1);
+ VN2.Scale(coef2);
+ SMDS_MeshNode* aNode1 = const_cast<SMDS_MeshNode*>(PrmI->GetNode(4));
+ aNode1->setXYZ( PCi.X()+VN1.X(), PCi.Y()+VN1.Y(), PCi.Z()+VN1.Z() );
+ SMDS_MeshNode* aNode2 = const_cast<SMDS_MeshNode*>(PrmJ->GetNode(4));
+ aNode2->setXYZ( PCj.X()+VN2.X(), PCj.Y()+VN2.Y(), PCj.Z()+VN2.Z() );
+ nodesToMove.insert( aNode1 );
+ nodesToMove.insert( aNode2 );
}
- gp_Pnt PC1(xc1/4.,yc1/4.,zc1/4.);
- gp_Pnt PC2(xc2/4.,yc2/4.,zc2/4.);
- gp_Vec VN1(PC1,Ps1[4]);
- gp_Vec VI1(PC1,Pint);
- gp_Vec VN2(PC2,Ps2[4]);
- gp_Vec VI2(PC2,Pint);
- double ang1 = fabs(VN1.Angle(VI1));
- double ang2 = fabs(VN2.Angle(VI2));
- double h1,h2;
- if(ang1>PI/3.)
- h1 = VI1.Magnitude()/2;
- else
- h1 = VI1.Magnitude()*cos(ang1);
- if(ang2>PI/3.)
- h2 = VI2.Magnitude()/2;
+ // fix intersections that could appear after apex movement
+ MergeAdjacent( PrmI, nodesToMove );
+ MergeAdjacent( PrmJ, nodesToMove );
+
+ } // end if(hasInt)
+ } // loop on suspectPyrams
+ } // loop on 4 base nodes of PrmI
+
+ } // loop on all pyramids
+
+ if( !nodesToMove.empty() && !meshDS->IsEmbeddedMode() )
+ {
+ set<const SMDS_MeshNode*>::iterator n = nodesToMove.begin();
+ for ( ; n != nodesToMove.end(); ++n )
+ meshDS->MoveNode( *n, (*n)->X(), (*n)->Y(), (*n)->Z() );
+ }
+
+ // move medium nodes of merged quadratic pyramids
+ if ( myPyramids[0]->IsQuadratic() )
+ UpdateQuadraticPyramids( nodesToMove, GetMeshDS() );
+
+ // erase removed triangles from the proxy mesh
+ if ( !myRemovedTrias.empty() )
+ {
+ 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
- h2 = VI2.Magnitude()*cos(ang2);
- double coef1 = 0.5;
- if(ang1<PI/3)
- coef1 -= cos(ang1)*0.25;
- double coef2 = 0.5;
- if(ang2<PI/3)
- coef2 -= cos(ang1)*0.25;
-
- SMDS_MeshNode* aNode1 = const_cast<SMDS_MeshNode*>(Ns1[4]);
- VN1.Scale(coef1);
- aNode1->setXYZ( PC1.X()+VN1.X(), PC1.Y()+VN1.Y(), PC1.Z()+VN1.Z() );
- SMDS_MeshNode* aNode2 = const_cast<SMDS_MeshNode*>(Ns2[4]);
- VN2.Scale(coef2);
- aNode2->setXYZ( PC2.X()+VN2.X(), PC2.Y()+VN2.Y(), PC2.Z()+VN2.Z() );
- NeedMove = true;
+ faces.push_back( tria );
}
- } // end if(hasInt)
- else {
- //cout<<" no intersec for i="<<i<<" j="<<j<<endl;
+ sm->ChangeElements( faces.begin(), faces.end() );
}
-
- }
- if( NeedMove && !meshDS->IsEmbeddedMode() ) {
- meshDS->MoveNode( Ns1[4], Ns1[4]->X(), Ns1[4]->Y(), Ns1[4]->Z() );
- }
}
- return true;
-}
+ myDegNodes.clear();
+ delete myElemSearcher;
+ myElemSearcher=0;
-//================================================================================
-/*!
- * \brief Return list of created triangles for given face
- */
-//================================================================================
-std::list<const SMDS_FaceOfNodes*> StdMeshers_QuadToTriaAdaptor::GetTriangles
- (const SMDS_MeshElement* aFace)
-{
- std::list<const SMDS_FaceOfNodes*> aRes;
- std::map< const SMDS_MeshElement*,
- std::list<const SMDS_FaceOfNodes*> >::iterator it = myResMap.find(aFace);
- if( it != myResMap.end() ) {
- aRes = (*it).second;
- }
- return aRes;
+ return true;
}
-
-
-//================================================================================
-/*!
- * \brief Remove all create auxilary faces
- */
-//================================================================================
-//void StdMeshers_QuadToTriaAdaptor::RemoveFaces(SMESH_Mesh& aMesh)
-//{
-// SMESHDS_Mesh * meshDS = aMesh.GetMeshDS();
-// std::map< const SMDS_MeshElement*,
-// std::list<const SMDS_MeshElement*> >::iterator it = myResMap.begin();
-// for(; it != myResMap.end(); it++ ) {
-// std::list<const SMDS_MeshElement*> aFaces = (*it).second;
-// std::list<const SMDS_MeshElement*>::iterator itf = aFaces.begin();
-// for(; itf!=aFaces.end(); itf++ ) {
-// meshDS->RemoveElement( (*itf) );
-// }
-// }
-//}
