1 // Copyright (C) 2007-2016 CEA/DEN, EDF R&D, OPEN CASCADE
3 // Copyright (C) 2003-2007 OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
4 // CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS
6 // This library is free software; you can redistribute it and/or
7 // modify it under the terms of the GNU Lesser General Public
8 // License as published by the Free Software Foundation; either
9 // version 2.1 of the License, or (at your option) any later version.
11 // This library is distributed in the hope that it will be useful,
12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 // Lesser General Public License for more details.
16 // You should have received a copy of the GNU Lesser General Public
17 // License along with this library; if not, write to the Free Software
18 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 // See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
23 // File: SMESH_MesherHelper.cxx
24 // Created: 15.02.06 15:22:41
25 // Author: Sergey KUUL
27 #include "SMESH_MesherHelper.hxx"
29 #include "SMDS_EdgePosition.hxx"
30 #include "SMDS_FaceOfNodes.hxx"
31 #include "SMDS_FacePosition.hxx"
32 #include "SMDS_IteratorOnIterators.hxx"
33 #include "SMDS_VolumeTool.hxx"
34 #include "SMESHDS_Mesh.hxx"
35 #include "SMESH_Block.hxx"
36 #include "SMESH_HypoFilter.hxx"
37 #include "SMESH_Mesh.hxx"
38 #include "SMESH_MeshAlgos.hxx"
39 #include "SMESH_ProxyMesh.hxx"
40 #include "SMESH_subMesh.hxx"
42 #include <BRepAdaptor_Curve.hxx>
43 #include <BRepAdaptor_Surface.hxx>
44 #include <BRepTools.hxx>
45 #include <BRep_Tool.hxx>
46 #include <Geom2d_Curve.hxx>
47 #include <GeomAPI_ProjectPointOnCurve.hxx>
48 #include <GeomAPI_ProjectPointOnSurf.hxx>
49 #include <Geom_Curve.hxx>
50 #include <Geom_RectangularTrimmedSurface.hxx>
51 #include <Geom_Surface.hxx>
52 #include <ShapeAnalysis.hxx>
54 #include <TopExp_Explorer.hxx>
55 #include <TopTools_ListIteratorOfListOfShape.hxx>
56 #include <TopTools_MapIteratorOfMapOfShape.hxx>
57 #include <TopTools_MapOfShape.hxx>
60 #include <gp_Pnt2d.hxx>
61 #include <gp_Trsf.hxx>
63 #include <Standard_Failure.hxx>
64 #include <Standard_ErrorHandler.hxx>
66 #include <utilities.h>
72 #define RETURN_BAD_RESULT(msg) { MESSAGE(msg); return false; }
76 inline SMESH_TNodeXYZ XYZ(const SMDS_MeshNode* n) { return SMESH_TNodeXYZ(n); }
78 enum { U_periodic = 1, V_periodic = 2 };
81 //================================================================================
85 //================================================================================
87 SMESH_MesherHelper::SMESH_MesherHelper(SMESH_Mesh& theMesh)
91 myCreateQuadratic(false),
92 myCreateBiQuadratic(false),
93 myFixNodeParameters(false)
95 myPar1[0] = myPar2[0] = myPar1[1] = myPar2[1] = 0;
96 mySetElemOnShape = ( ! myMesh->HasShapeToMesh() );
99 //=======================================================================
100 //function : ~SMESH_MesherHelper
102 //=======================================================================
104 SMESH_MesherHelper::~SMESH_MesherHelper()
107 TID2ProjectorOnSurf::iterator i_proj = myFace2Projector.begin();
108 for ( ; i_proj != myFace2Projector.end(); ++i_proj )
109 delete i_proj->second;
112 TID2ProjectorOnCurve::iterator i_proj = myEdge2Projector.begin();
113 for ( ; i_proj != myEdge2Projector.end(); ++i_proj )
114 delete i_proj->second;
118 //================================================================================
120 * \brief Return SMESH_Gen
122 //================================================================================
124 SMESH_Gen* SMESH_MesherHelper::GetGen() const
126 return GetMesh()->GetGen();
129 //================================================================================
131 * \brief Return mesh DS
133 //================================================================================
135 SMESHDS_Mesh* SMESH_MesherHelper::GetMeshDS() const
137 return GetMesh()->GetMeshDS();
140 //=======================================================================
141 //function : IsQuadraticSubMesh
142 //purpose : Check submesh for given shape: if all elements on this shape
143 // are quadratic, quadratic elements will be created.
144 // Also fill myTLinkNodeMap
145 //=======================================================================
147 bool SMESH_MesherHelper::IsQuadraticSubMesh(const TopoDS_Shape& aSh)
149 SMESHDS_Mesh* meshDS = GetMeshDS();
150 // we can create quadratic elements only if all elements
151 // created on sub-shapes of given shape are quadratic
152 // also we have to fill myTLinkNodeMap
153 myCreateQuadratic = true;
154 mySeamShapeIds.clear();
155 myDegenShapeIds.clear();
156 TopAbs_ShapeEnum subType( aSh.ShapeType()==TopAbs_FACE ? TopAbs_EDGE : TopAbs_FACE );
157 if ( aSh.ShapeType()==TopAbs_COMPOUND )
159 TopoDS_Iterator subIt( aSh );
161 subType = ( subIt.Value().ShapeType()==TopAbs_FACE ) ? TopAbs_EDGE : TopAbs_FACE;
163 SMDSAbs_ElementType elemType( subType==TopAbs_FACE ? SMDSAbs_Face : SMDSAbs_Edge );
166 //int nbOldLinks = myTLinkNodeMap.size();
168 if ( !myMesh->HasShapeToMesh() )
170 if (( myCreateQuadratic = myMesh->NbFaces( ORDER_QUADRATIC )))
172 SMDS_FaceIteratorPtr fIt = meshDS->facesIterator();
173 while ( fIt->more() )
174 AddTLinks( static_cast< const SMDS_MeshFace* >( fIt->next() ));
179 TopExp_Explorer exp( aSh, subType );
180 TopTools_MapOfShape checkedSubShapes;
181 for (; exp.More() && myCreateQuadratic; exp.Next()) {
182 if ( !checkedSubShapes.Add( exp.Current() ))
183 continue; // needed if aSh is compound of solids
184 if ( SMESHDS_SubMesh * subMesh = meshDS->MeshElements( exp.Current() )) {
185 if ( SMDS_ElemIteratorPtr it = subMesh->GetElements() ) {
187 const SMDS_MeshElement* e = it->next();
188 if ( e->GetType() != elemType || !e->IsQuadratic() ) {
189 myCreateQuadratic = false;
194 switch ( e->NbCornerNodes() ) {
196 AddTLinkNode(e->GetNode(0),e->GetNode(1),e->GetNode(2)); break;
198 AddTLinkNode(e->GetNode(0),e->GetNode(1),e->GetNode(3));
199 AddTLinkNode(e->GetNode(1),e->GetNode(2),e->GetNode(4));
200 AddTLinkNode(e->GetNode(2),e->GetNode(0),e->GetNode(5)); break;
202 AddTLinkNode(e->GetNode(0),e->GetNode(1),e->GetNode(4));
203 AddTLinkNode(e->GetNode(1),e->GetNode(2),e->GetNode(5));
204 AddTLinkNode(e->GetNode(2),e->GetNode(3),e->GetNode(6));
205 AddTLinkNode(e->GetNode(3),e->GetNode(0),e->GetNode(7));
208 myCreateQuadratic = false;
218 // if ( nbOldLinks == myTLinkNodeMap.size() ) -- 0023068
219 if ( myTLinkNodeMap.empty() )
220 myCreateQuadratic = false;
222 if ( !myCreateQuadratic )
223 myTLinkNodeMap.clear();
227 return myCreateQuadratic;
230 //=======================================================================
231 //function : SetSubShape
232 //purpose : Set geometry to make elements on
233 //=======================================================================
235 void SMESH_MesherHelper::SetSubShape(const int aShID)
237 if ( aShID == myShapeID )
240 SetSubShape( GetMeshDS()->IndexToShape( aShID ));
242 SetSubShape( TopoDS_Shape() );
245 //=======================================================================
246 //function : SetSubShape
247 //purpose : Set geometry to create elements on
248 //=======================================================================
250 void SMESH_MesherHelper::SetSubShape(const TopoDS_Shape& aSh)
252 if ( myShape.IsSame( aSh ))
256 mySeamShapeIds.clear();
257 myDegenShapeIds.clear();
259 if ( myShape.IsNull() ) {
263 SMESHDS_Mesh* meshDS = GetMeshDS();
264 myShapeID = meshDS->ShapeToIndex(aSh);
267 // treatment of periodic faces
268 for ( TopExp_Explorer eF( aSh, TopAbs_FACE ); eF.More(); eF.Next() )
270 const TopoDS_Face& face = TopoDS::Face( eF.Current() );
271 BRepAdaptor_Surface surf( face, false );
272 if ( surf.IsUPeriodic() || surf.IsUClosed() ) {
273 myParIndex |= U_periodic;
274 myPar1[0] = surf.FirstUParameter();
275 myPar2[0] = surf.LastUParameter();
277 if ( surf.IsVPeriodic() || surf.IsVClosed() ) {
278 myParIndex |= V_periodic;
279 myPar1[1] = surf.FirstVParameter();
280 myPar2[1] = surf.LastVParameter();
284 for (TopExp_Explorer exp( face, TopAbs_EDGE ); exp.More(); exp.Next())
286 // look for a "seam" edge, a real seam or an edge on period boundary
287 TopoDS_Edge edge = TopoDS::Edge( exp.Current() );
288 const int edgeID = meshDS->ShapeToIndex( edge );
291 BRep_Tool::UVPoints( edge, face, uv1, uv2 );
292 const double du = Abs( uv1.Coord(1) - uv2.Coord(1) );
293 const double dv = Abs( uv1.Coord(2) - uv2.Coord(2) );
295 bool isSeam = BRep_Tool::IsClosed( edge, face );
296 if ( isSeam ) // real seam - having two pcurves on face
298 // pcurve can lie not on pediod boundary (22582, mesh_Quadratic_01/C9)
301 double u1 = uv1.Coord(1);
303 BRep_Tool::UVPoints( edge, face, uv1, uv2 );
304 double u2 = uv1.Coord(1);
305 myPar1[0] = Min( u1, u2 );
306 myPar2[0] = Max( u1, u2 );
307 myParIndex |= U_periodic;
311 double v1 = uv1.Coord(2);
313 BRep_Tool::UVPoints( edge, face, uv1, uv2 );
314 double v2 = uv1.Coord(2);
315 myPar1[1] = Min( v1, v2 );
316 myPar2[1] = Max( v1, v2 );
317 myParIndex |= V_periodic;
320 else //if ( !isSeam )
322 // one pcurve but on period boundary (22772, mesh_Quadratic_01/D1)
323 if (( myParIndex & U_periodic ) && du < Precision::PConfusion() )
325 isSeam = ( Abs( uv1.Coord(1) - myPar1[0] ) < Precision::PConfusion() ||
326 Abs( uv1.Coord(1) - myPar2[0] ) < Precision::PConfusion() );
328 else if (( myParIndex & V_periodic ) && dv < Precision::PConfusion() )
330 isSeam = ( Abs( uv1.Coord(2) - myPar1[1] ) < Precision::PConfusion() ||
331 Abs( uv1.Coord(2) - myPar2[1] ) < Precision::PConfusion() );
333 if ( isSeam ) // vertices are on period boundary, check a middle point (23032)
335 double f,l, r = 0.2345;
336 Handle(Geom2d_Curve) C2d = BRep_Tool::CurveOnSurface( edge, face, f, l );
343 uv2 = C2d->Value( f * r + l * ( 1.-r ));
344 if ( du < Precision::PConfusion() )
345 isSeam = ( Abs( uv1.Coord(1) - uv2.Coord(1) ) < Precision::PConfusion() );
347 isSeam = ( Abs( uv1.Coord(2) - uv2.Coord(2) ) < Precision::PConfusion() );
353 // store seam shape indices, negative if shape encounters twice ('real seam')
354 mySeamShapeIds.insert( IsSeamShape( edgeID ) ? -edgeID : edgeID );
355 for ( TopExp_Explorer v( edge, TopAbs_VERTEX ); v.More(); v.Next() ) {
356 int vertexID = meshDS->ShapeToIndex( v.Current() );
357 mySeamShapeIds.insert( IsSeamShape( vertexID ) ? -vertexID : vertexID );
361 // look for a degenerated edge
362 if ( SMESH_Algo::isDegenerated( edge )) {
363 myDegenShapeIds.insert( edgeID );
364 for ( TopExp_Explorer v( edge, TopAbs_VERTEX ); v.More(); v.Next() )
365 myDegenShapeIds.insert( meshDS->ShapeToIndex( v.Current() ));
367 if ( !BRep_Tool::SameParameter( edge ) ||
368 !BRep_Tool::SameRange( edge ))
370 setPosOnShapeValidity( edgeID, false );
376 //=======================================================================
377 //function : ShapeToIndex
378 //purpose : Convert a shape to its index in the SMESHDS_Mesh
379 //=======================================================================
381 int SMESH_MesherHelper::ShapeToIndex( const TopoDS_Shape& S ) const
383 return GetMeshDS()->ShapeToIndex( S );
386 //=======================================================================
387 //function : GetNodeUVneedInFaceNode
388 //purpose : Check if inFaceNode argument is necessary for call GetNodeUV(F,..)
389 // Return true if the face is periodic.
390 // If F is Null, answer about sub-shape set through IsQuadraticSubMesh() or
392 //=======================================================================
394 bool SMESH_MesherHelper::GetNodeUVneedInFaceNode(const TopoDS_Face& F) const
396 if ( F.IsNull() ) return !mySeamShapeIds.empty();
398 if ( !F.IsNull() && !myShape.IsNull() && myShape.IsSame( F ))
399 return !mySeamShapeIds.empty();
402 Handle(Geom_Surface) aSurface = BRep_Tool::Surface( F,loc );
403 if ( !aSurface.IsNull() )
404 return ( aSurface->IsUPeriodic() || aSurface->IsVPeriodic() );
409 //=======================================================================
410 //function : IsMedium
412 //=======================================================================
414 bool SMESH_MesherHelper::IsMedium(const SMDS_MeshNode* node,
415 const SMDSAbs_ElementType typeToCheck)
417 return SMESH_MeshEditor::IsMedium( node, typeToCheck );
420 //=======================================================================
421 //function : GetSubShapeByNode
422 //purpose : Return support shape of a node
423 //=======================================================================
425 TopoDS_Shape SMESH_MesherHelper::GetSubShapeByNode(const SMDS_MeshNode* node,
426 const SMESHDS_Mesh* meshDS)
428 int shapeID = node ? node->getshapeId() : 0;
429 if ( 0 < shapeID && shapeID <= meshDS->MaxShapeIndex() )
430 return meshDS->IndexToShape( shapeID );
432 return TopoDS_Shape();
436 //=======================================================================
437 //function : AddTLinkNode
438 //purpose : add a link in my data structure
439 //=======================================================================
441 void SMESH_MesherHelper::AddTLinkNode(const SMDS_MeshNode* n1,
442 const SMDS_MeshNode* n2,
443 const SMDS_MeshNode* n12)
445 // add new record to map
446 SMESH_TLink link( n1, n2 );
447 myTLinkNodeMap.insert( make_pair(link,n12));
450 //================================================================================
452 * \brief Add quadratic links of edge to own data structure
454 //================================================================================
456 bool SMESH_MesherHelper::AddTLinks(const SMDS_MeshEdge* edge)
458 if ( edge && edge->IsQuadratic() )
459 AddTLinkNode(edge->GetNode(0), edge->GetNode(1), edge->GetNode(2));
465 //================================================================================
467 * \brief Add quadratic links of face to own data structure
469 //================================================================================
471 bool SMESH_MesherHelper::AddTLinks(const SMDS_MeshFace* f)
475 switch ( f->NbNodes() ) {
477 // myMapWithCentralNode.insert
478 // ( make_pair( TBiQuad( f->GetNode(0),f->GetNode(1),f->GetNode(2) ),
480 // break; -- add medium nodes as well
482 AddTLinkNode(f->GetNode(0),f->GetNode(1),f->GetNode(3));
483 AddTLinkNode(f->GetNode(1),f->GetNode(2),f->GetNode(4));
484 AddTLinkNode(f->GetNode(2),f->GetNode(0),f->GetNode(5)); break;
487 // myMapWithCentralNode.insert
488 // ( make_pair( TBiQuad( f->GetNode(0),f->GetNode(1),f->GetNode(2),f->GetNode(3) ),
490 // break; -- add medium nodes as well
492 AddTLinkNode(f->GetNode(0),f->GetNode(1),f->GetNode(4));
493 AddTLinkNode(f->GetNode(1),f->GetNode(2),f->GetNode(5));
494 AddTLinkNode(f->GetNode(2),f->GetNode(3),f->GetNode(6));
495 AddTLinkNode(f->GetNode(3),f->GetNode(0),f->GetNode(7)); break;
502 //================================================================================
504 * \brief Add quadratic links of volume to own data structure
506 //================================================================================
508 bool SMESH_MesherHelper::AddTLinks(const SMDS_MeshVolume* volume)
510 if ( volume->IsQuadratic() )
512 SMDS_VolumeTool vTool( volume );
513 const SMDS_MeshNode** nodes = vTool.GetNodes();
515 for ( int iF = 1; iF < vTool.NbFaces(); ++iF )
517 const int nbN = vTool.NbFaceNodes( iF );
518 const int* iNodes = vTool.GetFaceNodesIndices( iF );
519 for ( int i = 0; i < nbN; )
521 int iN1 = iNodes[i++];
522 int iN12 = iNodes[i++];
524 if ( iN1 > iN2 ) std::swap( iN1, iN2 );
525 int linkID = iN1 * vTool.NbNodes() + iN2;
526 pair< set<int>::iterator, bool > it_isNew = addedLinks.insert( linkID );
527 if ( it_isNew.second )
528 AddTLinkNode( nodes[iN1], nodes[iN2], nodes[iN12] );
530 addedLinks.erase( it_isNew.first ); // each link encounters only twice
532 if ( vTool.NbNodes() == 27 )
534 const SMDS_MeshNode* nFCenter = nodes[ vTool.GetCenterNodeIndex( iF )];
535 if ( nFCenter->GetPosition()->GetTypeOfPosition() == SMDS_TOP_3DSPACE )
536 myMapWithCentralNode.insert
537 ( make_pair( TBiQuad( nodes[ iNodes[0]], nodes[ iNodes[1]],
538 nodes[ iNodes[2]], nodes[ iNodes[3]] ),
547 //================================================================================
549 * \brief Return true if position of nodes on the shape hasn't yet been checked or
550 * the positions proved to be invalid
552 //================================================================================
554 bool SMESH_MesherHelper::toCheckPosOnShape(int shapeID ) const
556 map< int,bool >::const_iterator id_ok = myNodePosShapesValidity.find( shapeID );
557 return ( id_ok == myNodePosShapesValidity.end() || !id_ok->second );
560 //================================================================================
562 * \brief Set validity of positions of nodes on the shape.
563 * Once set, validity is not changed
565 //================================================================================
567 void SMESH_MesherHelper::setPosOnShapeValidity(int shapeID, bool ok ) const
569 std::map< int,bool >::iterator sh_ok =
570 ((SMESH_MesherHelper*)this)->myNodePosShapesValidity.insert( make_pair( shapeID, ok)).first;
575 //=======================================================================
576 //function : ToFixNodeParameters
577 //purpose : Enables fixing node parameters on EDGEs and FACEs in
578 // GetNodeU(...,check=true), GetNodeUV(...,check=true), CheckNodeUV() and
579 // CheckNodeU() in case if a node lies on a shape set via SetSubShape().
581 //=======================================================================
583 void SMESH_MesherHelper::ToFixNodeParameters(bool toFix)
585 myFixNodeParameters = toFix;
589 //=======================================================================
590 //function : getUVOnSeam
591 //purpose : Select UV on either of 2 pcurves of a seam edge, closest to the given UV
592 //=======================================================================
594 gp_Pnt2d SMESH_MesherHelper::getUVOnSeam( const gp_Pnt2d& uv1, const gp_Pnt2d& uv2 ) const
596 gp_Pnt2d result = uv1;
597 for ( int i = U_periodic; i <= V_periodic ; ++i )
599 if ( myParIndex & i )
601 double p1 = uv1.Coord( i );
602 double dp1 = Abs( p1-myPar1[i-1]), dp2 = Abs( p1-myPar2[i-1]);
603 if ( myParIndex == i ||
604 dp1 < ( myPar2[i-1] - myPar1[i-1] ) / 100. ||
605 dp2 < ( myPar2[i-1] - myPar1[i-1] ) / 100. )
607 double p2 = uv2.Coord( i );
608 double p1Alt = ( dp1 < dp2 ) ? myPar2[i-1] : myPar1[i-1];
609 if ( Abs( p2 - p1 ) > Abs( p2 - p1Alt ))
610 result.SetCoord( i, p1Alt );
617 //=======================================================================
618 //function : GetNodeUV
619 //purpose : Return node UV on face
620 //=======================================================================
622 gp_XY SMESH_MesherHelper::GetNodeUV(const TopoDS_Face& F,
623 const SMDS_MeshNode* n,
624 const SMDS_MeshNode* n2,
627 gp_Pnt2d uv( Precision::Infinite(), Precision::Infinite() );
629 const SMDS_PositionPtr Pos = n->GetPosition();
631 if ( Pos->GetTypeOfPosition() == SMDS_TOP_FACE )
633 // node has position on face
634 const SMDS_FacePosition* fpos = static_cast<const SMDS_FacePosition*>( Pos );
635 uv.SetCoord( fpos->GetUParameter(), fpos->GetVParameter() );
637 uvOK = CheckNodeUV( F, n, uv.ChangeCoord(), 2.*getFaceMaxTol( F )); // 2. from 22830
639 else if ( Pos->GetTypeOfPosition() == SMDS_TOP_EDGE )
641 // node has position on EDGE => it is needed to find
642 // corresponding EDGE from FACE, get pcurve for this
643 // EDGE and retrieve value from this pcurve
644 const SMDS_EdgePosition* epos = static_cast<const SMDS_EdgePosition*>( Pos );
645 const int edgeID = n->getshapeId();
646 const TopoDS_Edge& E = TopoDS::Edge( GetMeshDS()->IndexToShape( edgeID ));
647 double f, l, u = epos->GetUParameter();
648 Handle(Geom2d_Curve) C2d = BRep_Tool::CurveOnSurface( E, F, f, l );
649 bool validU = ( !C2d.IsNull() && ( f < u ) && ( u < l ));
650 if ( validU ) uv = C2d->Value( u );
651 else uv.SetCoord( Precision::Infinite(),0.);
652 if ( check || !validU )
653 uvOK = CheckNodeUV( F, n, uv.ChangeCoord(), 2.*getFaceMaxTol( F ),/*force=*/ !validU );
655 // for a node on a seam EDGE select one of UVs on 2 pcurves
656 if ( n2 && IsSeamShape( edgeID ))
658 uv = getUVOnSeam( uv, GetNodeUV( F, n2, 0, check ));
661 { // adjust uv to period
663 Handle(Geom_Surface) S = BRep_Tool::Surface(F,loc);
664 Standard_Boolean isUPeriodic = S->IsUPeriodic();
665 Standard_Boolean isVPeriodic = S->IsVPeriodic();
667 if ( isUPeriodic || isVPeriodic ) {
668 Standard_Real UF,UL,VF,VL;
669 S->Bounds(UF,UL,VF,VL);
670 if ( isUPeriodic ) newUV.SetX( uv.X() + ShapeAnalysis::AdjustToPeriod(uv.X(),UF,UL));
671 if ( isVPeriodic ) newUV.SetY( uv.Y() + ShapeAnalysis::AdjustToPeriod(uv.Y(),VF,VL));
675 gp_Pnt2d uv2 = GetNodeUV( F, n2, 0, check );
676 if ( isUPeriodic && Abs( uv.X()-uv2.X() ) < Abs( newUV.X()-uv2.X() ))
677 newUV.SetX( uv.X() );
678 if ( isVPeriodic && Abs( uv.Y()-uv2.Y() ) < Abs( newUV.Y()-uv2.Y() ))
679 newUV.SetY( uv.Y() );
685 else if ( Pos->GetTypeOfPosition() == SMDS_TOP_VERTEX )
687 if ( int vertexID = n->getshapeId() ) {
688 const TopoDS_Vertex& V = TopoDS::Vertex(GetMeshDS()->IndexToShape(vertexID));
690 uv = BRep_Tool::Parameters( V, F );
693 catch (Standard_Failure& exc) {
697 if ( !IsSubShape( V, F ))
699 MESSAGE("GetNodeUV() Vertex "<< vertexID <<" not in face "<< GetMeshDS()->ShapeToIndex(F));
700 // get UV of a vertex closest to the node
702 gp_Pnt pn = XYZ( n );
703 for ( TopExp_Explorer vert( F,TopAbs_VERTEX ); !uvOK && vert.More(); vert.Next() ) {
704 TopoDS_Vertex curV = TopoDS::Vertex( vert.Current() );
705 gp_Pnt p = BRep_Tool::Pnt( curV );
706 double curDist = p.SquareDistance( pn );
707 if ( curDist < dist ) {
709 uv = BRep_Tool::Parameters( curV, F );
710 uvOK = ( dist < DBL_MIN );
717 TopTools_ListIteratorOfListOfShape it( myMesh->GetAncestors( V ));
718 for ( ; it.More(); it.Next() ) {
719 if ( it.Value().ShapeType() == TopAbs_EDGE ) {
720 const TopoDS_Edge & edge = TopoDS::Edge( it.Value() );
722 Handle(Geom2d_Curve) C2d = BRep_Tool::CurveOnSurface(edge, F, f, l);
723 if ( !C2d.IsNull() ) {
724 double u = ( V == IthVertex( 0, edge )) ? f : l;
725 uv = C2d->Value( u );
731 if ( !uvOK && V.Orientation() == TopAbs_INTERNAL )
733 Handle(ShapeAnalysis_Surface) projector = GetSurface( F );
734 if ( n2 ) uv = GetNodeUV( F, n2 );
735 if ( Precision::IsInfinite( uv.X() ))
736 uv = projector->NextValueOfUV( uv, BRep_Tool::Pnt( V ), BRep_Tool::Tolerance( F ));
738 uv = projector->ValueOfUV( BRep_Tool::Pnt( V ), BRep_Tool::Tolerance( F ));
739 uvOK = ( projector->Gap() < getFaceMaxTol( F ));
743 if ( n2 && IsSeamShape( vertexID ))
745 bool isSeam = ( myShape.IsSame( F ));
747 SMESH_MesherHelper h( *myMesh );
749 isSeam = IsSeamShape( vertexID );
753 uv = getUVOnSeam( uv, GetNodeUV( F, n2, 0 ));
759 uvOK = CheckNodeUV( F, n, uv.ChangeCoord(), 2.*getFaceMaxTol( F ));
762 if ( check && !uvOK )
768 //=======================================================================
769 //function : CheckNodeUV
770 //purpose : Check and fix node UV on a face
771 //=======================================================================
773 bool SMESH_MesherHelper::CheckNodeUV(const TopoDS_Face& F,
774 const SMDS_MeshNode* n,
778 double distXYZ[4]) const
780 int shapeID = n->getshapeId();
782 if (( infinit = ( Precision::IsInfinite( uv.X() ) || Precision::IsInfinite( uv.Y() ))) ||
784 ( uv.X() == 0. && uv.Y() == 0. ) ||
785 ( toCheckPosOnShape( shapeID )))
787 // check that uv is correct
789 Handle(Geom_Surface) surface = BRep_Tool::Surface( F,loc );
790 gp_Pnt nodePnt = XYZ( n ), surfPnt(0,0,0);
792 if ( !loc.IsIdentity() ) nodePnt.Transform( loc.Transformation().Inverted() );
794 (dist = nodePnt.Distance( surfPnt = surface->Value( uv.X(), uv.Y() ))) > tol )
796 setPosOnShapeValidity( shapeID, false );
797 if ( !infinit && distXYZ ) {
798 surfPnt.Transform( loc );
800 distXYZ[1] = surfPnt.X(); distXYZ[2] = surfPnt.Y(); distXYZ[3]=surfPnt.Z();
802 // uv incorrect, project the node to surface
803 GeomAPI_ProjectPointOnSurf& projector = GetProjector( F, loc, tol );
804 projector.Perform( nodePnt );
805 if ( !projector.IsDone() || projector.NbPoints() < 1 )
807 MESSAGE( "SMESH_MesherHelper::CheckNodeUV() failed to project" );
810 Quantity_Parameter U,V;
811 projector.LowerDistanceParameters(U,V);
813 surfPnt = surface->Value( U, V );
814 dist = nodePnt.Distance( surfPnt );
816 surfPnt.Transform( loc );
818 distXYZ[1] = surfPnt.X(); distXYZ[2] = surfPnt.Y(); distXYZ[3]=surfPnt.Z();
822 MESSAGE( "SMESH_MesherHelper::CheckNodeUV(), invalid projection" );
825 // store the fixed UV on the face
826 if ( myShape.IsSame(F) && shapeID == myShapeID && myFixNodeParameters )
827 const_cast<SMDS_MeshNode*>(n)->SetPosition
828 ( SMDS_PositionPtr( new SMDS_FacePosition( U, V )));
830 else if ( myShape.IsSame(F) && uv.Modulus() > numeric_limits<double>::min() )
832 setPosOnShapeValidity( shapeID, true );
838 //=======================================================================
839 //function : GetProjector
840 //purpose : Return projector intitialized by given face without location, which is returned
841 //=======================================================================
843 GeomAPI_ProjectPointOnSurf& SMESH_MesherHelper::GetProjector(const TopoDS_Face& F,
844 TopLoc_Location& loc,
847 Handle(Geom_Surface) surface = BRep_Tool::Surface( F,loc );
848 int faceID = GetMeshDS()->ShapeToIndex( F );
849 TID2ProjectorOnSurf& i2proj = const_cast< TID2ProjectorOnSurf&>( myFace2Projector );
850 TID2ProjectorOnSurf::iterator i_proj = i2proj.find( faceID );
851 if ( i_proj == i2proj.end() )
853 if ( tol == 0 ) tol = BRep_Tool::Tolerance( F );
854 double U1, U2, V1, V2;
855 surface->Bounds(U1, U2, V1, V2);
856 GeomAPI_ProjectPointOnSurf* proj = new GeomAPI_ProjectPointOnSurf();
857 proj->Init( surface, U1, U2, V1, V2, tol );
858 i_proj = i2proj.insert( make_pair( faceID, proj )).first;
860 return *( i_proj->second );
863 //=======================================================================
864 //function : GetSurface
865 //purpose : Return a cached ShapeAnalysis_Surface of a FACE
866 //=======================================================================
868 Handle(ShapeAnalysis_Surface) SMESH_MesherHelper::GetSurface(const TopoDS_Face& F ) const
870 Handle(Geom_Surface) surface = BRep_Tool::Surface( F );
871 int faceID = GetMeshDS()->ShapeToIndex( F );
872 TID2Surface::iterator i_surf = myFace2Surface.find( faceID );
873 if ( i_surf == myFace2Surface.end() && faceID )
875 Handle(ShapeAnalysis_Surface) surf( new ShapeAnalysis_Surface( surface ));
876 i_surf = myFace2Surface.insert( make_pair( faceID, surf )).first;
878 return i_surf->second;
883 gp_XY AverageUV(const gp_XY& uv1, const gp_XY& uv2) { return ( uv1 + uv2 ) / 2.; }
884 gp_XY_FunPtr(Added); // define gp_XY_Added pointer to function calling gp_XY::Added(gp_XY)
885 gp_XY_FunPtr(Subtracted);
888 //=======================================================================
889 //function : ApplyIn2D
890 //purpose : Perform given operation on two 2d points in parameric space of given surface.
891 // It takes into account period of the surface. Use gp_XY_FunPtr macro
892 // to easily define pointer to function of gp_XY class.
893 //=======================================================================
895 gp_XY SMESH_MesherHelper::ApplyIn2D(Handle(Geom_Surface) surface,
899 const bool resultInPeriod)
901 if ( surface->IsKind(STANDARD_TYPE(Geom_RectangularTrimmedSurface )))
902 surface = Handle(Geom_RectangularTrimmedSurface)::DownCast( surface )->BasisSurface();
903 Standard_Boolean isUPeriodic = surface.IsNull() ? false : surface->IsUPeriodic();
904 Standard_Boolean isVPeriodic = surface.IsNull() ? false : surface->IsVPeriodic();
905 if ( !isUPeriodic && !isVPeriodic )
908 // move uv2 not far than half-period from uv1
910 uv2.X()+(isUPeriodic ? ShapeAnalysis::AdjustByPeriod(uv2.X(),uv1.X(),surface->UPeriod()) :0);
912 uv2.Y()+(isVPeriodic ? ShapeAnalysis::AdjustByPeriod(uv2.Y(),uv1.Y(),surface->VPeriod()) :0);
915 gp_XY res = fun( uv1, gp_XY(u2,v2) );
917 // move result within period
918 if ( resultInPeriod )
920 Standard_Real UF,UL,VF,VL;
921 surface->Bounds(UF,UL,VF,VL);
923 res.SetX( res.X() + ShapeAnalysis::AdjustToPeriod(res.X(),UF,UL));
925 res.SetY( res.Y() + ShapeAnalysis::AdjustToPeriod(res.Y(),VF,VL));
931 //=======================================================================
932 //function : AdjustByPeriod
933 //purpose : Move node positions on a FACE within surface period
934 //=======================================================================
936 void SMESH_MesherHelper::AdjustByPeriod( const TopoDS_Face& face, gp_XY uv[], const int nbUV )
938 SMESH_MesherHelper h( *myMesh ), *ph = face.IsSame( myShape ) ? this : &h;
939 ph->SetSubShape( face );
941 for ( int iCoo = U_periodic; iCoo <= V_periodic; ++iCoo )
942 if ( ph->GetPeriodicIndex() & iCoo )
944 const double period = ( ph->myPar2[iCoo-1] - ph->myPar1[iCoo-1] );
945 const double xRef = uv[0].Coord( iCoo );
946 for ( int i = 1; i < nbUV; ++i )
948 double x = uv[i].Coord( iCoo );
949 double dx = ShapeAnalysis::AdjustByPeriod( x, xRef, period );
950 uv[i].SetCoord( iCoo, x + dx );
955 //=======================================================================
956 //function : GetMiddleUV
957 //purpose : Return middle UV taking in account surface period
958 //=======================================================================
960 gp_XY SMESH_MesherHelper::GetMiddleUV(const Handle(Geom_Surface)& surface,
965 // the proper place of getting basic surface seems to be in ApplyIn2D()
966 // but we put it here to decrease a risk of regressions just before releasing a version
967 // Handle(Geom_Surface) surf = surface;
968 // while ( !surf.IsNull() && surf->IsKind(STANDARD_TYPE(Geom_RectangularTrimmedSurface )))
969 // surf = Handle(Geom_RectangularTrimmedSurface)::DownCast( surf )->BasisSurface();
971 return ApplyIn2D( surface, p1, p2, & AverageUV );
974 //=======================================================================
975 //function : GetCenterUV
976 //purpose : Return UV for the central node of a biquadratic triangle
977 //=======================================================================
979 gp_XY SMESH_MesherHelper::GetCenterUV(const gp_XY& uv1,
985 bool * isBadTria/*=0*/)
988 gp_XY uvAvg = ( uv12 + uv23 + uv31 ) / 3.;
990 if (( badTria = (( uvAvg - uv1 ) * ( uvAvg - uv23 ) > 0 )))
991 uvAvg = ( uv1 + uv23 ) / 2.;
992 else if (( badTria = (( uvAvg - uv2 ) * ( uvAvg - uv31 ) > 0 )))
993 uvAvg = ( uv2 + uv31 ) / 2.;
994 else if (( badTria = (( uvAvg - uv3 ) * ( uvAvg - uv12 ) > 0 )))
995 uvAvg = ( uv3 + uv12 ) / 2.;
998 *isBadTria = badTria;
1002 //=======================================================================
1003 //function : GetNodeU
1004 //purpose : Return node U on edge
1005 //=======================================================================
1007 double SMESH_MesherHelper::GetNodeU(const TopoDS_Edge& E,
1008 const SMDS_MeshNode* n,
1009 const SMDS_MeshNode* inEdgeNode,
1012 double param = Precision::Infinite();
1014 const SMDS_PositionPtr pos = n->GetPosition();
1015 if ( pos->GetTypeOfPosition()==SMDS_TOP_EDGE )
1017 const SMDS_EdgePosition* epos = static_cast<const SMDS_EdgePosition*>( pos );
1018 param = epos->GetUParameter();
1020 else if( pos->GetTypeOfPosition() == SMDS_TOP_VERTEX )
1022 if ( inEdgeNode && TopExp::FirstVertex( E ).IsSame( TopExp::LastVertex( E ))) // issue 0020128
1025 BRep_Tool::Range( E, f,l );
1026 double uInEdge = GetNodeU( E, inEdgeNode );
1027 param = ( fabs( uInEdge - f ) < fabs( l - uInEdge )) ? f : l;
1031 SMESHDS_Mesh * meshDS = GetMeshDS();
1032 int vertexID = n->getshapeId();
1033 const TopoDS_Vertex& V = TopoDS::Vertex(meshDS->IndexToShape(vertexID));
1034 param = BRep_Tool::Parameter( V, E );
1039 double tol = BRep_Tool::Tolerance( E );
1040 double f,l; BRep_Tool::Range( E, f,l );
1041 bool force = ( param < f-tol || param > l+tol );
1042 if ( !force && pos->GetTypeOfPosition()==SMDS_TOP_EDGE )
1043 force = ( GetMeshDS()->ShapeToIndex( E ) != n->getshapeId() );
1045 *check = CheckNodeU( E, n, param, 2*tol, force );
1050 //=======================================================================
1051 //function : CheckNodeU
1052 //purpose : Check and fix node U on an edge
1053 // Return false if U is bad and could not be fixed
1054 //=======================================================================
1056 bool SMESH_MesherHelper::CheckNodeU(const TopoDS_Edge& E,
1057 const SMDS_MeshNode* n,
1061 double distXYZ[4]) const
1063 int shapeID = n->getshapeId();
1065 if (( infinit = Precision::IsInfinite( u )) ||
1068 ( toCheckPosOnShape( shapeID )))
1070 TopLoc_Location loc; double f,l;
1071 Handle(Geom_Curve) curve = BRep_Tool::Curve( E,loc,f,l );
1072 if ( curve.IsNull() ) // degenerated edge
1074 if ( u+tol < f || u-tol > l )
1076 double r = Max( 0.5, 1 - tol*n->GetID()); // to get a unique u on edge
1082 gp_Pnt nodePnt = SMESH_TNodeXYZ( n );
1083 if ( !loc.IsIdentity() ) nodePnt.Transform( loc.Transformation().Inverted() );
1085 double dist = 2*tol;
1088 curvPnt = curve->Value( u );
1089 dist = nodePnt.Distance( curvPnt );
1091 curvPnt.Transform( loc );
1093 distXYZ[1] = curvPnt.X(); distXYZ[2] = curvPnt.Y(); distXYZ[3]=curvPnt.Z();
1098 setPosOnShapeValidity( shapeID, false );
1099 // u incorrect, project the node to the curve
1100 int edgeID = GetMeshDS()->ShapeToIndex( E );
1101 TID2ProjectorOnCurve& i2proj = const_cast< TID2ProjectorOnCurve&>( myEdge2Projector );
1102 TID2ProjectorOnCurve::iterator i_proj =
1103 i2proj.insert( make_pair( edgeID, (GeomAPI_ProjectPointOnCurve*) 0 )).first;
1104 if ( !i_proj->second )
1106 i_proj->second = new GeomAPI_ProjectPointOnCurve();
1107 i_proj->second->Init( curve, f, l );
1109 GeomAPI_ProjectPointOnCurve* projector = i_proj->second;
1110 projector->Perform( nodePnt );
1111 if ( projector->NbPoints() < 1 )
1113 MESSAGE( "SMESH_MesherHelper::CheckNodeU() failed to project" );
1116 Quantity_Parameter U = projector->LowerDistanceParameter();
1118 curvPnt = curve->Value( u );
1119 dist = nodePnt.Distance( curvPnt );
1121 curvPnt.Transform( loc );
1123 distXYZ[1] = curvPnt.X(); distXYZ[2] = curvPnt.Y(); distXYZ[3]=curvPnt.Z();
1127 MESSAGE( "CheckNodeU(), invalid projection; distance " << dist << "; tol " << tol );
1130 // store the fixed U on the edge
1131 if ( myShape.IsSame(E) && shapeID == myShapeID && myFixNodeParameters )
1132 const_cast<SMDS_MeshNode*>(n)->SetPosition
1133 ( SMDS_PositionPtr( new SMDS_EdgePosition( U )));
1135 else if ( fabs( u ) > numeric_limits<double>::min() )
1137 setPosOnShapeValidity( shapeID, true );
1139 if (( u < f-tol || u > l+tol ) && force )
1141 MESSAGE("u < f-tol || u > l+tol ; u " << u << " f " << f << " l " << l);
1142 // node is on vertex but is set on periodic but trimmed edge (issue 0020890)
1145 // do not use IsPeriodic() as Geom_TrimmedCurve::IsPeriodic () returns false
1146 double period = curve->Period();
1147 u = ( u < f ) ? u + period : u - period;
1149 catch (Standard_Failure& exc)
1159 //=======================================================================
1160 //function : GetMediumPos
1161 //purpose : Return index and type of the shape (EDGE or FACE only) to
1162 // set a medium node on
1163 //param : useCurSubShape - if true, returns the shape set via SetSubShape()
1165 //param : expectedSupport - shape type corresponding to element being created,
1166 // e.g TopAbs_EDGE if SMDSAbs_Edge is created
1167 // basing on \a n1 and \a n2
1168 // Calling GetMediumPos() with useCurSubShape=true is OK only for the
1169 // case where the lower dim mesh is already constructed and converted to quadratic,
1170 // else, nodes on EDGEs are assigned to FACE, for example.
1171 //=======================================================================
1173 std::pair<int, TopAbs_ShapeEnum>
1174 SMESH_MesherHelper::GetMediumPos(const SMDS_MeshNode* n1,
1175 const SMDS_MeshNode* n2,
1176 const bool useCurSubShape,
1177 TopAbs_ShapeEnum expectedSupport)
1179 if ( useCurSubShape && !myShape.IsNull() )
1180 return std::make_pair( myShapeID, myShape.ShapeType() );
1182 TopAbs_ShapeEnum shapeType = TopAbs_SHAPE;
1186 if (( myShapeID == n1->getshapeId() || myShapeID == n2->getshapeId() ) && myShapeID > 0 )
1188 shapeType = myShape.ShapeType();
1189 shapeID = myShapeID;
1191 else if ( n1->getshapeId() == n2->getshapeId() )
1193 shapeID = n2->getshapeId();
1194 shape = GetSubShapeByNode( n1, GetMeshDS() );
1196 else // 2 different shapes
1198 const SMDS_TypeOfPosition Pos1 = n1->GetPosition()->GetTypeOfPosition();
1199 const SMDS_TypeOfPosition Pos2 = n2->GetPosition()->GetTypeOfPosition();
1201 if ( Pos1 == SMDS_TOP_3DSPACE || Pos2 == SMDS_TOP_3DSPACE )
1205 else if ( Pos1 == SMDS_TOP_FACE || Pos2 == SMDS_TOP_FACE )
1208 if ( Pos1 != SMDS_TOP_FACE || Pos2 != SMDS_TOP_FACE ) // not 2 FACEs
1210 if ( Pos1 != SMDS_TOP_FACE ) std::swap( n1,n2 );
1211 TopoDS_Shape F = GetSubShapeByNode( n1, GetMeshDS() );
1212 TopoDS_Shape S = GetSubShapeByNode( n2, GetMeshDS() );
1213 if ( IsSubShape( S, F ))
1215 shapeType = TopAbs_FACE;
1216 shapeID = n1->getshapeId();
1220 else if ( Pos1 == SMDS_TOP_EDGE && Pos2 == SMDS_TOP_EDGE )
1222 TopoDS_Shape E1 = GetSubShapeByNode( n1, GetMeshDS() );
1223 TopoDS_Shape E2 = GetSubShapeByNode( n2, GetMeshDS() );
1224 shape = GetCommonAncestor( E1, E2, *myMesh, TopAbs_FACE );
1226 else if ( Pos1 == SMDS_TOP_VERTEX && Pos2 == SMDS_TOP_VERTEX )
1228 TopoDS_Shape V1 = GetSubShapeByNode( n1, GetMeshDS() );
1229 TopoDS_Shape V2 = GetSubShapeByNode( n2, GetMeshDS() );
1230 shape = GetCommonAncestor( V1, V2, *myMesh, TopAbs_EDGE );
1231 if ( shape.IsNull() ) shape = GetCommonAncestor( V1, V2, *myMesh, TopAbs_FACE );
1233 else // on VERTEX and EDGE
1235 if ( Pos1 != SMDS_TOP_VERTEX ) std::swap( n1,n2 );
1236 TopoDS_Shape V = GetSubShapeByNode( n1, GetMeshDS() );
1237 TopoDS_Shape E = GetSubShapeByNode( n2, GetMeshDS() );
1238 if ( IsSubShape( V, E ))
1241 shape = GetCommonAncestor( V, E, *myMesh, TopAbs_FACE );
1245 if ( !shape.IsNull() )
1248 shapeID = GetMeshDS()->ShapeToIndex( shape );
1249 shapeType = shape.ShapeType(); // EDGE or FACE
1251 if ( expectedSupport < shapeType &&
1252 expectedSupport != TopAbs_SHAPE &&
1253 !myShape.IsNull() &&
1254 myShape.ShapeType() == expectedSupport )
1256 // e.g. a side of triangle connects nodes on the same EDGE but does not
1257 // lie on this EDGE (an arc with a coarse mesh)
1258 // => shapeType == TopAbs_EDGE, expectedSupport == TopAbs_FACE;
1259 // hope that myShape is a right shape, return it if the found shape
1260 // has converted elements of corresponding dim (segments in our example)
1261 int nbConvertedElems = 0;
1262 SMDSAbs_ElementType type = ( shapeType == TopAbs_FACE ? SMDSAbs_Face : SMDSAbs_Edge );
1263 for ( int iN = 0; iN < 2; ++iN )
1265 const SMDS_MeshNode* n = iN ? n2 : n1;
1266 SMDS_ElemIteratorPtr it = n->GetInverseElementIterator( type );
1267 while ( it->more() )
1269 const SMDS_MeshElement* elem = it->next();
1270 if ( elem->getshapeId() == shapeID &&
1271 elem->IsQuadratic() )
1278 if ( nbConvertedElems == 2 )
1280 shapeType = myShape.ShapeType();
1281 shapeID = myShapeID;
1285 return make_pair( shapeID, shapeType );
1288 //=======================================================================
1289 //function : GetCentralNode
1290 //purpose : Return existing or create a new central node for a quardilateral
1291 // quadratic face given its 8 nodes.
1292 //@param : force3d - true means node creation in between the given nodes,
1293 // else node position is found on a geometrical face if any.
1294 //=======================================================================
1296 const SMDS_MeshNode* SMESH_MesherHelper::GetCentralNode(const SMDS_MeshNode* n1,
1297 const SMDS_MeshNode* n2,
1298 const SMDS_MeshNode* n3,
1299 const SMDS_MeshNode* n4,
1300 const SMDS_MeshNode* n12,
1301 const SMDS_MeshNode* n23,
1302 const SMDS_MeshNode* n34,
1303 const SMDS_MeshNode* n41,
1306 SMDS_MeshNode *centralNode = 0; // central node to return
1308 // Find an existing central node
1310 TBiQuad keyOfMap(n1,n2,n3,n4);
1311 std::map<TBiQuad, const SMDS_MeshNode* >::iterator itMapCentralNode;
1312 itMapCentralNode = myMapWithCentralNode.find( keyOfMap );
1313 if ( itMapCentralNode != myMapWithCentralNode.end() )
1315 return (*itMapCentralNode).second;
1318 // Get type of shape for the new central node
1320 TopAbs_ShapeEnum shapeType = TopAbs_SHAPE;
1324 TopTools_ListIteratorOfListOfShape it;
1326 std::map< int, int > faceId2nbNodes;
1327 std::map< int, int > ::iterator itMapWithIdFace;
1329 SMESHDS_Mesh* meshDS = GetMeshDS();
1331 // check if a face lies on a FACE, i.e. its all corner nodes lie either on the FACE or
1332 // on sub-shapes of the FACE
1333 if ( GetMesh()->HasShapeToMesh() )
1335 const SMDS_MeshNode* nodes[] = { n1, n2, n3, n4 };
1336 for(int i = 0; i < 4; i++)
1338 shape = GetSubShapeByNode( nodes[i], meshDS );
1339 if ( shape.IsNull() ) break;
1340 if ( shape.ShapeType() == TopAbs_SOLID )
1342 solidID = nodes[i]->getshapeId();
1343 shapeType = TopAbs_SOLID;
1346 if ( shape.ShapeType() == TopAbs_FACE )
1348 faceID = nodes[i]->getshapeId();
1349 itMapWithIdFace = faceId2nbNodes.insert( std::make_pair( faceID, 0 ) ).first;
1350 itMapWithIdFace->second++;
1354 PShapeIteratorPtr it = GetAncestors( shape, *GetMesh(), TopAbs_FACE );
1355 while ( const TopoDS_Shape* face = it->next() )
1357 faceID = meshDS->ShapeToIndex( *face );
1358 itMapWithIdFace = faceId2nbNodes.insert( std::make_pair( faceID, 0 )).first;
1359 itMapWithIdFace->second++;
1364 if ( solidID < 1 && !faceId2nbNodes.empty() ) // SOLID not found
1366 // find ID of the FACE the four corner nodes belong to
1367 itMapWithIdFace = faceId2nbNodes.find( myShapeID ); // IPAL52698
1368 if ( itMapWithIdFace != faceId2nbNodes.end() &&
1369 itMapWithIdFace->second == 4 )
1371 shapeType = TopAbs_FACE;
1376 itMapWithIdFace = faceId2nbNodes.begin();
1377 for ( ; itMapWithIdFace != faceId2nbNodes.end(); ++itMapWithIdFace)
1379 if ( itMapWithIdFace->second == 4 )
1381 shapeType = TopAbs_FACE;
1382 faceID = (*itMapWithIdFace).first;
1390 if ( shapeType == TopAbs_FACE )
1392 F = TopoDS::Face( meshDS->IndexToShape( faceID ));
1399 bool toCheck = true;
1400 if ( !F.IsNull() && !force3d )
1402 Handle(ShapeAnalysis_Surface) surface = GetSurface( F );
1403 if ( HasDegeneratedEdges() || surface->HasSingularities( 1e-7 ))
1405 gp_Pnt center = calcTFI (0.5, 0.5, // IPAL0052863
1406 SMESH_TNodeXYZ(n1), SMESH_TNodeXYZ(n2),
1407 SMESH_TNodeXYZ(n3), SMESH_TNodeXYZ(n4),
1408 SMESH_TNodeXYZ(n12), SMESH_TNodeXYZ(n23),
1409 SMESH_TNodeXYZ(n34), SMESH_TNodeXYZ(n41));
1410 gp_Pnt2d uv12 = GetNodeUV( F, n12, n3, &toCheck );
1411 uvAvg = surface->NextValueOfUV( uv12, center, BRep_Tool::Tolerance( F )).XY();
1416 GetNodeUV( F,n1, n3, &toCheck ),
1417 GetNodeUV( F,n2, n4, &toCheck ),
1418 GetNodeUV( F,n3, n1, &toCheck ),
1419 GetNodeUV( F,n4, n2, &toCheck ),
1420 GetNodeUV( F,n12, n3 ),
1421 GetNodeUV( F,n23, n4 ),
1422 GetNodeUV( F,n34, n2 ),
1423 GetNodeUV( F,n41, n2 )
1425 AdjustByPeriod( F, uv, 8 ); // put uv[] within a period (IPAL52698)
1427 uvAvg = calcTFI (0.5, 0.5, uv[0],uv[1],uv[2],uv[3], uv[4],uv[5],uv[6],uv[7] );
1429 P = surface->Value( uvAvg );
1430 centralNode = meshDS->AddNode( P.X(), P.Y(), P.Z() );
1431 // if ( mySetElemOnShape ) node is not elem!
1432 meshDS->SetNodeOnFace( centralNode, faceID, uvAvg.X(), uvAvg.Y() );
1434 else // ( force3d || F.IsNull() )
1436 P = calcTFI (0.5, 0.5,
1437 SMESH_TNodeXYZ(n1), SMESH_TNodeXYZ(n2),
1438 SMESH_TNodeXYZ(n3), SMESH_TNodeXYZ(n4),
1439 SMESH_TNodeXYZ(n12), SMESH_TNodeXYZ(n23),
1440 SMESH_TNodeXYZ(n34), SMESH_TNodeXYZ(n41));
1441 centralNode = meshDS->AddNode( P.X(), P.Y(), P.Z() );
1443 if ( !F.IsNull() ) // force3d
1445 uvAvg = (GetNodeUV(F,n1,n3,&toCheck) +
1446 GetNodeUV(F,n2,n4,&toCheck) +
1447 GetNodeUV(F,n3,n1,&toCheck) +
1448 GetNodeUV(F,n4,n2,&toCheck)) / 4;
1449 //CheckNodeUV( F, centralNode, uvAvg, 2*BRep_Tool::Tolerance( F ), /*force=*/true);
1450 meshDS->SetNodeOnFace( centralNode, faceID, uvAvg.X(), uvAvg.Y() );
1452 else if ( solidID > 0 )
1454 meshDS->SetNodeInVolume( centralNode, solidID );
1456 else if ( myShapeID > 0 && mySetElemOnShape )
1458 meshDS->SetMeshElementOnShape( centralNode, myShapeID );
1461 myMapWithCentralNode.insert( std::make_pair( keyOfMap, centralNode ) );
1465 //=======================================================================
1466 //function : GetCentralNode
1467 //purpose : Return existing or create a new central node for a
1468 // quadratic triangle given its 6 nodes.
1469 //@param : force3d - true means node creation in between the given nodes,
1470 // else node position is found on a geometrical face if any.
1471 //=======================================================================
1473 const SMDS_MeshNode* SMESH_MesherHelper::GetCentralNode(const SMDS_MeshNode* n1,
1474 const SMDS_MeshNode* n2,
1475 const SMDS_MeshNode* n3,
1476 const SMDS_MeshNode* n12,
1477 const SMDS_MeshNode* n23,
1478 const SMDS_MeshNode* n31,
1481 SMDS_MeshNode *centralNode = 0; // central node to return
1483 // Find an existing central node
1485 TBiQuad keyOfMap(n1,n2,n3);
1486 std::map<TBiQuad, const SMDS_MeshNode* >::iterator itMapCentralNode;
1487 itMapCentralNode = myMapWithCentralNode.find( keyOfMap );
1488 if ( itMapCentralNode != myMapWithCentralNode.end() )
1490 return (*itMapCentralNode).second;
1493 // Get type of shape for the new central node
1495 TopAbs_ShapeEnum shapeType = TopAbs_SHAPE;
1499 TopTools_ListIteratorOfListOfShape it;
1501 std::map< int, int > faceId2nbNodes;
1502 std::map< int, int > ::iterator itMapWithIdFace;
1504 SMESHDS_Mesh* meshDS = GetMeshDS();
1506 // check if a face lies on a FACE, i.e. its all corner nodes lie either on the FACE or
1507 // on sub-shapes of the FACE
1508 if ( GetMesh()->HasShapeToMesh() )
1510 const SMDS_MeshNode* nodes[] = { n1, n2, n3 };
1511 for(int i = 0; i < 3; i++)
1513 shape = GetSubShapeByNode( nodes[i], meshDS );
1514 if ( shape.IsNull() ) break;
1515 if ( shape.ShapeType() == TopAbs_SOLID )
1517 solidID = nodes[i]->getshapeId();
1518 shapeType = TopAbs_SOLID;
1521 if ( shape.ShapeType() == TopAbs_FACE )
1523 faceID = nodes[i]->getshapeId();
1524 itMapWithIdFace = faceId2nbNodes.insert( std::make_pair( faceID, 0 ) ).first;
1525 itMapWithIdFace->second++;
1529 PShapeIteratorPtr it = GetAncestors(shape, *GetMesh(), TopAbs_FACE );
1530 while ( const TopoDS_Shape* face = it->next() )
1532 faceID = meshDS->ShapeToIndex( *face );
1533 itMapWithIdFace = faceId2nbNodes.insert( std::make_pair( faceID, 0 ) ).first;
1534 itMapWithIdFace->second++;
1539 if ( solidID < 1 && !faceId2nbNodes.empty() ) // SOLID not found
1541 // find ID of the FACE the four corner nodes belong to
1542 itMapWithIdFace = faceId2nbNodes.find( myShapeID ); // IPAL52698
1543 if ( itMapWithIdFace != faceId2nbNodes.end() &&
1544 itMapWithIdFace->second == 4 )
1546 shapeType = TopAbs_FACE;
1551 itMapWithIdFace = faceId2nbNodes.begin();
1552 for ( ; itMapWithIdFace != faceId2nbNodes.end(); ++itMapWithIdFace)
1554 if ( itMapWithIdFace->second == 3 )
1556 shapeType = TopAbs_FACE;
1557 faceID = (*itMapWithIdFace).first;
1567 if ( shapeType == TopAbs_FACE )
1569 F = TopoDS::Face( meshDS->IndexToShape( faceID ));
1570 bool checkOK = true, badTria = false;
1572 GetNodeUV( F, n1, n23, &checkOK ),
1573 GetNodeUV( F, n2, n31, &checkOK ),
1574 GetNodeUV( F, n3, n12, &checkOK ),
1575 GetNodeUV( F, n12, n3, &checkOK ),
1576 GetNodeUV( F, n23, n1, &checkOK ),
1577 GetNodeUV( F, n31, n2, &checkOK )
1579 AdjustByPeriod( F, uv, 6 ); // put uv[] within a period (IPAL52698)
1581 uvAvg = GetCenterUV( uv[0],uv[1],uv[2], uv[3],uv[4],uv[5], &badTria );
1583 if ( badTria || !checkOK )
1587 // Create a central node
1590 if ( !F.IsNull() && !force3d )
1592 TopLoc_Location loc;
1593 Handle( Geom_Surface ) S = BRep_Tool::Surface( F, loc );
1594 P = S->Value( uvAvg.X(), uvAvg.Y() ).Transformed( loc );
1595 centralNode = meshDS->AddNode( P.X(), P.Y(), P.Z() );
1596 // if ( mySetElemOnShape ) node is not elem!
1597 meshDS->SetNodeOnFace( centralNode, faceID, uvAvg.X(), uvAvg.Y() );
1599 else // ( force3d || F.IsNull() )
1601 P = ( SMESH_TNodeXYZ( n12 ) +
1602 SMESH_TNodeXYZ( n23 ) +
1603 SMESH_TNodeXYZ( n31 ) ) / 3;
1604 centralNode = meshDS->AddNode( P.X(), P.Y(), P.Z() );
1606 if ( !F.IsNull() ) // force3d
1608 meshDS->SetNodeOnFace( centralNode, faceID, uvAvg.X(), uvAvg.Y() );
1610 else if ( solidID > 0 )
1612 meshDS->SetNodeInVolume( centralNode, solidID );
1614 else if ( myShapeID > 0 && mySetElemOnShape )
1616 meshDS->SetMeshElementOnShape( centralNode, myShapeID );
1619 myMapWithCentralNode.insert( std::make_pair( keyOfMap, centralNode ) );
1623 //=======================================================================
1624 //function : GetMediumNode
1625 //purpose : Return existing or create a new medium node between given ones
1626 //=======================================================================
1628 const SMDS_MeshNode* SMESH_MesherHelper::GetMediumNode(const SMDS_MeshNode* n1,
1629 const SMDS_MeshNode* n2,
1631 TopAbs_ShapeEnum expectedSupport)
1633 // Find existing node
1635 SMESH_TLink link(n1,n2);
1636 ItTLinkNode itLN = myTLinkNodeMap.find( link );
1637 if ( itLN != myTLinkNodeMap.end() ) {
1638 return (*itLN).second;
1641 // Create medium node
1644 SMESHDS_Mesh* meshDS = GetMeshDS();
1646 if ( IsSeamShape( n1->getshapeId() ))
1647 // to get a correct UV of a node on seam, the second node must have checked UV
1648 std::swap( n1, n2 );
1650 // get type of shape for the new medium node
1651 int faceID = -1, edgeID = -1;
1652 TopoDS_Edge E; double u [2] = {0.,0.};
1653 TopoDS_Face F; gp_XY uv[2];
1654 bool uvOK[2] = { true, true };
1655 const bool useCurSubShape = ( !myShape.IsNull() && myShape.ShapeType() == TopAbs_EDGE );
1657 pair<int, TopAbs_ShapeEnum> pos = GetMediumPos( n1, n2, useCurSubShape, expectedSupport );
1659 // get positions of the given nodes on shapes
1660 if ( pos.second == TopAbs_FACE )
1662 F = TopoDS::Face(meshDS->IndexToShape( faceID = pos.first ));
1663 uv[0] = GetNodeUV(F,n1,n2, force3d ? 0 : &uvOK[0]);
1665 ( HasDegeneratedEdges() || GetSurface( F )->HasSingularities( 1e-7 )))
1667 // IPAL52850 (degen VERTEX not at singularity)
1668 // project middle point to a surface
1669 SMESH_TNodeXYZ p1( n1 ), p2( n2 );
1670 gp_Pnt pMid = 0.5 * ( p1 + p2 );
1671 Handle(ShapeAnalysis_Surface) projector = GetSurface( F );
1674 uvMid = projector->NextValueOfUV( uv[0], pMid, BRep_Tool::Tolerance( F ));
1676 uvMid = projector->ValueOfUV( pMid, getFaceMaxTol( F ));
1677 if ( projector->Gap() * projector->Gap() < ( p1 - p2 ).SquareModulus() / 4 )
1679 gp_Pnt pProj = projector->Value( uvMid );
1680 n12 = meshDS->AddNode( pProj.X(), pProj.Y(), pProj.Z() );
1681 meshDS->SetNodeOnFace( n12, faceID, uvMid.X(), uvMid.Y() );
1682 myTLinkNodeMap.insert( make_pair ( link, n12 ));
1686 uv[1] = GetNodeUV(F,n2,n1, force3d ? 0 : &uvOK[1]);
1688 else if ( pos.second == TopAbs_EDGE )
1690 const SMDS_PositionPtr Pos1 = n1->GetPosition();
1691 const SMDS_PositionPtr Pos2 = n2->GetPosition();
1692 if ( Pos1->GetTypeOfPosition()==SMDS_TOP_EDGE &&
1693 Pos2->GetTypeOfPosition()==SMDS_TOP_EDGE &&
1694 n1->getshapeId() != n2->getshapeId() )
1697 return getMediumNodeOnComposedWire(n1,n2,force3d);
1699 E = TopoDS::Edge(meshDS->IndexToShape( edgeID = pos.first ));
1701 u[0] = GetNodeU(E,n1,n2, force3d ? 0 : &uvOK[0]);
1702 u[1] = GetNodeU(E,n2,n1, force3d ? 0 : &uvOK[1]);
1704 catch ( Standard_Failure& f )
1706 // issue 22502 / a node is on VERTEX not belonging to E
1707 // issue 22568 / both nodes are on non-connected VERTEXes
1708 return getMediumNodeOnComposedWire(n1,n2,force3d);
1712 if ( !force3d & uvOK[0] && uvOK[1] )
1714 // we try to create medium node using UV parameters of
1715 // nodes, else - medium between corresponding 3d points
1718 //if ( uvOK[0] && uvOK[1] )
1720 if ( IsDegenShape( n1->getshapeId() )) {
1721 if ( myParIndex & U_periodic ) uv[0].SetCoord( 1, uv[1].Coord( 1 ));
1722 else uv[0].SetCoord( 2, uv[1].Coord( 2 ));
1724 else if ( IsDegenShape( n2->getshapeId() )) {
1725 if ( myParIndex & U_periodic ) uv[1].SetCoord( 1, uv[0].Coord( 1 ));
1726 else uv[1].SetCoord( 2, uv[0].Coord( 2 ));
1728 TopLoc_Location loc;
1729 Handle(Geom_Surface) S = BRep_Tool::Surface(F,loc);
1730 gp_XY UV = GetMiddleUV( S, uv[0], uv[1] );
1731 gp_Pnt P = S->Value( UV.X(), UV.Y() ).Transformed(loc);
1732 n12 = meshDS->AddNode(P.X(), P.Y(), P.Z());
1733 // if ( mySetElemOnShape ) node is not elem!
1734 meshDS->SetNodeOnFace(n12, faceID, UV.X(), UV.Y());
1735 myTLinkNodeMap.insert(make_pair(link,n12));
1739 else if ( !E.IsNull() )
1742 Handle(Geom_Curve) C = BRep_Tool::Curve(E, f, l);
1745 Standard_Boolean isPeriodic = C->IsPeriodic();
1748 Standard_Real Period = C->Period();
1749 Standard_Real p = u[1]+ShapeAnalysis::AdjustByPeriod(u[1],u[0],Period);
1750 Standard_Real pmid = (u[0]+p)/2.;
1751 U = pmid+ShapeAnalysis::AdjustToPeriod(pmid,C->FirstParameter(),C->LastParameter());
1756 gp_Pnt P = C->Value( U );
1757 n12 = meshDS->AddNode(P.X(), P.Y(), P.Z());
1758 //if ( mySetElemOnShape ) node is not elem!
1759 meshDS->SetNodeOnEdge(n12, edgeID, U);
1760 myTLinkNodeMap.insert(make_pair(link,n12));
1767 double x = ( n1->X() + n2->X() )/2.;
1768 double y = ( n1->Y() + n2->Y() )/2.;
1769 double z = ( n1->Z() + n2->Z() )/2.;
1770 n12 = meshDS->AddNode(x,y,z);
1772 //if ( mySetElemOnShape ) node is not elem!
1776 gp_XY UV = ( uv[0] + uv[1] ) / 2.;
1777 CheckNodeUV( F, n12, UV, 2 * BRep_Tool::Tolerance( F ), /*force=*/true);
1778 meshDS->SetNodeOnFace(n12, faceID, UV.X(), UV.Y() );
1780 else if ( !E.IsNull() )
1782 double U = ( u[0] + u[1] ) / 2.;
1783 CheckNodeU( E, n12, U, 2 * BRep_Tool::Tolerance( E ), /*force=*/true);
1784 meshDS->SetNodeOnEdge(n12, edgeID, U);
1786 else if ( myShapeID > 0 && mySetElemOnShape )
1788 meshDS->SetMeshElementOnShape(n12, myShapeID);
1792 myTLinkNodeMap.insert( make_pair( link, n12 ));
1796 //================================================================================
1798 * \brief Makes a medium node if nodes reside different edges
1800 //================================================================================
1802 const SMDS_MeshNode* SMESH_MesherHelper::getMediumNodeOnComposedWire(const SMDS_MeshNode* n1,
1803 const SMDS_MeshNode* n2,
1806 SMESH_TNodeXYZ p1( n1 ), p2( n2 );
1807 gp_Pnt middle = 0.5 * p1 + 0.5 * p2;
1808 SMDS_MeshNode* n12 = AddNode( middle.X(), middle.Y(), middle.Z() );
1810 // To find position on edge and 3D position for n12,
1811 // project <middle> to 2 edges and select projection most close to <middle>
1813 TopoDS_Edge bestEdge;
1814 double u = 0, distMiddleProj = Precision::Infinite(), distXYZ[4], f,l;
1816 // get shapes under the nodes
1817 TopoDS_Shape shape[2];
1819 for ( int is2nd = 0; is2nd < 2; ++is2nd )
1821 const SMDS_MeshNode* n = is2nd ? n2 : n1;
1822 TopoDS_Shape S = GetSubShapeByNode( n, GetMeshDS() );
1824 shape[ nbShapes++ ] = S;
1827 vector< TopoDS_Shape > edges;
1828 for ( int iS = 0; iS < nbShapes; ++iS )
1830 switch ( shape[iS].ShapeType() ) {
1833 edges.push_back( shape[iS] );
1839 if ( nbShapes == 2 && iS==0 && shape[1-iS].ShapeType() == TopAbs_VERTEX )
1840 edge = GetCommonAncestor( shape[iS], shape[1-iS], *myMesh, TopAbs_EDGE );
1842 if ( edge.IsNull() )
1844 PShapeIteratorPtr eIt = GetAncestors( shape[iS], *myMesh, TopAbs_EDGE );
1845 while( const TopoDS_Shape* e = eIt->next() )
1846 edges.push_back( *e );
1852 if ( nbShapes == 1 || shape[1-iS].ShapeType() < TopAbs_EDGE )
1853 for ( TopExp_Explorer e( shape[iS], TopAbs_EDGE ); e.More(); e.Next() )
1854 edges.push_back( e.Current() );
1861 // project to get U of projection and distance from middle to projection
1862 for ( size_t iE = 0; iE < edges.size(); ++iE )
1864 const TopoDS_Edge& edge = TopoDS::Edge( edges[ iE ]);
1865 distXYZ[0] = distMiddleProj;
1867 CheckNodeU( edge, n12, testU, 2 * BRep_Tool::Tolerance(edge), /*force=*/true, distXYZ );
1868 if ( distXYZ[0] < distMiddleProj )
1870 distMiddleProj = distXYZ[0];
1876 // // both projections failed; set n12 on the edge of n1 with U of a common vertex
1877 // TopoDS_Vertex vCommon;
1878 // if ( TopExp::CommonVertex( edges[0], edges[1], vCommon ))
1879 // u = BRep_Tool::Parameter( vCommon, edges[0] );
1882 // double f,l, u0 = GetNodeU( edges[0], n1 );
1883 // BRep_Tool::Range( edges[0],f,l );
1884 // u = ( fabs(u0-f) < fabs(u0-l) ) ? f : l;
1887 // distMiddleProj = 0;
1890 if ( !bestEdge.IsNull() )
1892 // move n12 to position of a successfull projection
1893 //double tol = BRep_Tool::Tolerance(edges[ iOkEdge ]);
1894 if ( !force3d /*&& distMiddleProj > 2*tol*/ )
1896 TopLoc_Location loc;
1897 Handle(Geom_Curve) curve = BRep_Tool::Curve( bestEdge,loc,f,l );
1898 gp_Pnt p = curve->Value( u ).Transformed( loc );
1899 GetMeshDS()->MoveNode( n12, p.X(), p.Y(), p.Z() );
1901 //if ( mySetElemOnShape ) node is not elem!
1903 int edgeID = GetMeshDS()->ShapeToIndex( bestEdge );
1904 if ( edgeID != n12->getshapeId() )
1905 GetMeshDS()->UnSetNodeOnShape( n12 );
1906 GetMeshDS()->SetNodeOnEdge(n12, edgeID, u);
1909 myTLinkNodeMap.insert( make_pair( SMESH_TLink(n1,n2), n12 ));
1914 //=======================================================================
1915 //function : AddNode
1916 //purpose : Creates a node
1917 //=======================================================================
1919 SMDS_MeshNode* SMESH_MesherHelper::AddNode(double x, double y, double z, int ID,
1922 SMESHDS_Mesh * meshDS = GetMeshDS();
1923 SMDS_MeshNode* node = 0;
1925 node = meshDS->AddNodeWithID( x, y, z, ID );
1927 node = meshDS->AddNode( x, y, z );
1928 if ( mySetElemOnShape && myShapeID > 0 ) { // node is not elem ?
1929 switch ( myShape.ShapeType() ) {
1930 case TopAbs_SOLID: meshDS->SetNodeInVolume( node, myShapeID); break;
1931 case TopAbs_SHELL: meshDS->SetNodeInVolume( node, myShapeID); break;
1932 case TopAbs_FACE: meshDS->SetNodeOnFace( node, myShapeID, u, v); break;
1933 case TopAbs_EDGE: meshDS->SetNodeOnEdge( node, myShapeID, u); break;
1934 case TopAbs_VERTEX: meshDS->SetNodeOnVertex( node, myShapeID); break;
1941 //=======================================================================
1942 //function : AddEdge
1943 //purpose : Creates quadratic or linear edge
1944 //=======================================================================
1946 SMDS_MeshEdge* SMESH_MesherHelper::AddEdge(const SMDS_MeshNode* n1,
1947 const SMDS_MeshNode* n2,
1951 SMESHDS_Mesh * meshDS = GetMeshDS();
1953 SMDS_MeshEdge* edge = 0;
1954 if (myCreateQuadratic) {
1955 const SMDS_MeshNode* n12 = GetMediumNode(n1,n2,force3d);
1957 edge = meshDS->AddEdgeWithID(n1, n2, n12, id);
1959 edge = meshDS->AddEdge(n1, n2, n12);
1963 edge = meshDS->AddEdgeWithID(n1, n2, id);
1965 edge = meshDS->AddEdge(n1, n2);
1968 if ( mySetElemOnShape && myShapeID > 0 )
1969 meshDS->SetMeshElementOnShape( edge, myShapeID );
1974 //=======================================================================
1975 //function : AddFace
1976 //purpose : Creates quadratic or linear triangle
1977 //=======================================================================
1979 SMDS_MeshFace* SMESH_MesherHelper::AddFace(const SMDS_MeshNode* n1,
1980 const SMDS_MeshNode* n2,
1981 const SMDS_MeshNode* n3,
1985 SMESHDS_Mesh * meshDS = GetMeshDS();
1986 SMDS_MeshFace* elem = 0;
1988 if( n1==n2 || n2==n3 || n3==n1 )
1991 if(!myCreateQuadratic) {
1993 elem = meshDS->AddFaceWithID(n1, n2, n3, id);
1995 elem = meshDS->AddFace(n1, n2, n3);
1998 const SMDS_MeshNode* n12 = GetMediumNode( n1, n2, force3d, TopAbs_FACE );
1999 const SMDS_MeshNode* n23 = GetMediumNode( n2, n3, force3d, TopAbs_FACE );
2000 const SMDS_MeshNode* n31 = GetMediumNode( n3, n1, force3d, TopAbs_FACE );
2001 if(myCreateBiQuadratic)
2003 const SMDS_MeshNode* nCenter = GetCentralNode(n1, n2, n3, n12, n23, n31, force3d);
2005 elem = meshDS->AddFaceWithID(n1, n2, n3, n12, n23, n31, nCenter, id);
2007 elem = meshDS->AddFace(n1, n2, n3, n12, n23, n31, nCenter);
2012 elem = meshDS->AddFaceWithID(n1, n2, n3, n12, n23, n31, id);
2014 elem = meshDS->AddFace(n1, n2, n3, n12, n23, n31);
2017 if ( mySetElemOnShape && myShapeID > 0 )
2018 meshDS->SetMeshElementOnShape( elem, myShapeID );
2023 //=======================================================================
2024 //function : AddFace
2025 //purpose : Creates bi-quadratic, quadratic or linear quadrangle
2026 //=======================================================================
2028 SMDS_MeshFace* SMESH_MesherHelper::AddFace(const SMDS_MeshNode* n1,
2029 const SMDS_MeshNode* n2,
2030 const SMDS_MeshNode* n3,
2031 const SMDS_MeshNode* n4,
2035 SMESHDS_Mesh * meshDS = GetMeshDS();
2036 SMDS_MeshFace* elem = 0;
2039 return AddFace(n1,n3,n4,id,force3d);
2042 return AddFace(n1,n2,n4,id,force3d);
2045 return AddFace(n1,n2,n3,id,force3d);
2048 return AddFace(n1,n2,n4,id,force3d);
2051 return AddFace(n1,n2,n3,id,force3d);
2054 return AddFace(n1,n2,n3,id,force3d);
2057 if(!myCreateQuadratic) {
2059 elem = meshDS->AddFaceWithID(n1, n2, n3, n4, id);
2061 elem = meshDS->AddFace(n1, n2, n3, n4);
2064 const SMDS_MeshNode* n12 = GetMediumNode( n1, n2, force3d, TopAbs_FACE );
2065 const SMDS_MeshNode* n23 = GetMediumNode( n2, n3, force3d, TopAbs_FACE );
2066 const SMDS_MeshNode* n34 = GetMediumNode( n3, n4, force3d, TopAbs_FACE );
2067 const SMDS_MeshNode* n41 = GetMediumNode( n4, n1, force3d, TopAbs_FACE );
2068 if(myCreateBiQuadratic)
2070 const SMDS_MeshNode* nCenter = GetCentralNode(n1, n2, n3, n4, n12, n23, n34, n41, force3d);
2072 elem = meshDS->AddFaceWithID(n1, n2, n3, n4, n12, n23, n34, n41, nCenter, id);
2074 elem = meshDS->AddFace(n1, n2, n3, n4, n12, n23, n34, n41, nCenter);
2079 elem = meshDS->AddFaceWithID(n1, n2, n3, n4, n12, n23, n34, n41, id);
2081 elem = meshDS->AddFace(n1, n2, n3, n4, n12, n23, n34, n41);
2084 if ( mySetElemOnShape && myShapeID > 0 )
2085 meshDS->SetMeshElementOnShape( elem, myShapeID );
2090 //=======================================================================
2091 //function : AddPolygonalFace
2092 //purpose : Creates polygon, with additional nodes in quadratic mesh
2093 //=======================================================================
2095 SMDS_MeshFace* SMESH_MesherHelper::AddPolygonalFace (const vector<const SMDS_MeshNode*>& nodes,
2099 SMESHDS_Mesh * meshDS = GetMeshDS();
2100 SMDS_MeshFace* elem = 0;
2102 if(!myCreateQuadratic)
2105 elem = meshDS->AddPolygonalFaceWithID(nodes, id);
2107 elem = meshDS->AddPolygonalFace(nodes);
2111 vector<const SMDS_MeshNode*> newNodes( nodes.size() * 2 );
2113 for ( size_t i = 0; i < nodes.size(); ++i )
2115 const SMDS_MeshNode* n1 = nodes[i];
2116 const SMDS_MeshNode* n2 = nodes[(i+1)%nodes.size()];
2117 const SMDS_MeshNode* n12 = GetMediumNode( n1, n2, force3d, TopAbs_FACE );
2118 newNodes.push_back( n12 );
2121 elem = meshDS->AddQuadPolygonalFaceWithID(newNodes, id);
2123 elem = meshDS->AddQuadPolygonalFace(newNodes);
2125 if ( mySetElemOnShape && myShapeID > 0 )
2126 meshDS->SetMeshElementOnShape( elem, myShapeID );
2131 //=======================================================================
2132 //function : AddVolume
2133 //purpose : Creates quadratic or linear prism
2134 //=======================================================================
2136 SMDS_MeshVolume* SMESH_MesherHelper::AddVolume(const SMDS_MeshNode* n1,
2137 const SMDS_MeshNode* n2,
2138 const SMDS_MeshNode* n3,
2139 const SMDS_MeshNode* n4,
2140 const SMDS_MeshNode* n5,
2141 const SMDS_MeshNode* n6,
2145 SMESHDS_Mesh * meshDS = GetMeshDS();
2146 SMDS_MeshVolume* elem = 0;
2147 if(!myCreateQuadratic) {
2149 elem = meshDS->AddVolumeWithID(n1, n2, n3, n4, n5, n6, id);
2151 elem = meshDS->AddVolume(n1, n2, n3, n4, n5, n6);
2154 const SMDS_MeshNode* n12 = GetMediumNode( n1, n2, force3d, TopAbs_SOLID );
2155 const SMDS_MeshNode* n23 = GetMediumNode( n2, n3, force3d, TopAbs_SOLID );
2156 const SMDS_MeshNode* n31 = GetMediumNode( n3, n1, force3d, TopAbs_SOLID );
2158 const SMDS_MeshNode* n45 = GetMediumNode( n4, n5, force3d, TopAbs_SOLID );
2159 const SMDS_MeshNode* n56 = GetMediumNode( n5, n6, force3d, TopAbs_SOLID );
2160 const SMDS_MeshNode* n64 = GetMediumNode( n6, n4, force3d, TopAbs_SOLID );
2162 const SMDS_MeshNode* n14 = GetMediumNode( n1, n4, force3d, TopAbs_SOLID );
2163 const SMDS_MeshNode* n25 = GetMediumNode( n2, n5, force3d, TopAbs_SOLID );
2164 const SMDS_MeshNode* n36 = GetMediumNode( n3, n6, force3d, TopAbs_SOLID );
2167 elem = meshDS->AddVolumeWithID(n1, n2, n3, n4, n5, n6,
2168 n12, n23, n31, n45, n56, n64, n14, n25, n36, id);
2170 elem = meshDS->AddVolume(n1, n2, n3, n4, n5, n6,
2171 n12, n23, n31, n45, n56, n64, n14, n25, n36);
2173 if ( mySetElemOnShape && myShapeID > 0 )
2174 meshDS->SetMeshElementOnShape( elem, myShapeID );
2179 //=======================================================================
2180 //function : AddVolume
2181 //purpose : Creates quadratic or linear tetrahedron
2182 //=======================================================================
2184 SMDS_MeshVolume* SMESH_MesherHelper::AddVolume(const SMDS_MeshNode* n1,
2185 const SMDS_MeshNode* n2,
2186 const SMDS_MeshNode* n3,
2187 const SMDS_MeshNode* n4,
2191 SMESHDS_Mesh * meshDS = GetMeshDS();
2192 SMDS_MeshVolume* elem = 0;
2193 if(!myCreateQuadratic) {
2195 elem = meshDS->AddVolumeWithID(n1, n2, n3, n4, id);
2197 elem = meshDS->AddVolume(n1, n2, n3, n4);
2200 const SMDS_MeshNode* n12 = GetMediumNode( n1, n2, force3d, TopAbs_SOLID );
2201 const SMDS_MeshNode* n23 = GetMediumNode( n2, n3, force3d, TopAbs_SOLID );
2202 const SMDS_MeshNode* n31 = GetMediumNode( n3, n1, force3d, TopAbs_SOLID );
2204 const SMDS_MeshNode* n14 = GetMediumNode( n1, n4, force3d, TopAbs_SOLID );
2205 const SMDS_MeshNode* n24 = GetMediumNode( n2, n4, force3d, TopAbs_SOLID );
2206 const SMDS_MeshNode* n34 = GetMediumNode( n3, n4, force3d, TopAbs_SOLID );
2209 elem = meshDS->AddVolumeWithID(n1, n2, n3, n4, n12, n23, n31, n14, n24, n34, id);
2211 elem = meshDS->AddVolume(n1, n2, n3, n4, n12, n23, n31, n14, n24, n34);
2213 if ( mySetElemOnShape && myShapeID > 0 )
2214 meshDS->SetMeshElementOnShape( elem, myShapeID );
2219 //=======================================================================
2220 //function : AddVolume
2221 //purpose : Creates quadratic or linear pyramid
2222 //=======================================================================
2224 SMDS_MeshVolume* SMESH_MesherHelper::AddVolume(const SMDS_MeshNode* n1,
2225 const SMDS_MeshNode* n2,
2226 const SMDS_MeshNode* n3,
2227 const SMDS_MeshNode* n4,
2228 const SMDS_MeshNode* n5,
2232 SMDS_MeshVolume* elem = 0;
2233 if(!myCreateQuadratic) {
2235 elem = GetMeshDS()->AddVolumeWithID(n1, n2, n3, n4, n5, id);
2237 elem = GetMeshDS()->AddVolume(n1, n2, n3, n4, n5);
2240 const SMDS_MeshNode* n12 = GetMediumNode( n1, n2, force3d, TopAbs_SOLID );
2241 const SMDS_MeshNode* n23 = GetMediumNode( n2, n3, force3d, TopAbs_SOLID );
2242 const SMDS_MeshNode* n34 = GetMediumNode( n3, n4, force3d, TopAbs_SOLID );
2243 const SMDS_MeshNode* n41 = GetMediumNode( n4, n1, force3d, TopAbs_SOLID );
2245 const SMDS_MeshNode* n15 = GetMediumNode( n1, n5, force3d, TopAbs_SOLID );
2246 const SMDS_MeshNode* n25 = GetMediumNode( n2, n5, force3d, TopAbs_SOLID );
2247 const SMDS_MeshNode* n35 = GetMediumNode( n3, n5, force3d, TopAbs_SOLID );
2248 const SMDS_MeshNode* n45 = GetMediumNode( n4, n5, force3d, TopAbs_SOLID );
2251 elem = GetMeshDS()->AddVolumeWithID ( n1, n2, n3, n4, n5,
2256 elem = GetMeshDS()->AddVolume( n1, n2, n3, n4, n5,
2258 n15, n25, n35, n45);
2260 if ( mySetElemOnShape && myShapeID > 0 )
2261 GetMeshDS()->SetMeshElementOnShape( elem, myShapeID );
2266 //=======================================================================
2267 //function : AddVolume
2268 //purpose : Creates tri-quadratic, quadratic or linear hexahedron
2269 //=======================================================================
2271 SMDS_MeshVolume* SMESH_MesherHelper::AddVolume(const SMDS_MeshNode* n1,
2272 const SMDS_MeshNode* n2,
2273 const SMDS_MeshNode* n3,
2274 const SMDS_MeshNode* n4,
2275 const SMDS_MeshNode* n5,
2276 const SMDS_MeshNode* n6,
2277 const SMDS_MeshNode* n7,
2278 const SMDS_MeshNode* n8,
2282 SMESHDS_Mesh * meshDS = GetMeshDS();
2283 SMDS_MeshVolume* elem = 0;
2284 if(!myCreateQuadratic) {
2286 elem = meshDS->AddVolumeWithID(n1, n2, n3, n4, n5, n6, n7, n8, id);
2288 elem = meshDS->AddVolume(n1, n2, n3, n4, n5, n6, n7, n8);
2291 const SMDS_MeshNode* n12 = GetMediumNode( n1, n2, force3d, TopAbs_SOLID );
2292 const SMDS_MeshNode* n23 = GetMediumNode( n2, n3, force3d, TopAbs_SOLID );
2293 const SMDS_MeshNode* n34 = GetMediumNode( n3, n4, force3d, TopAbs_SOLID );
2294 const SMDS_MeshNode* n41 = GetMediumNode( n4, n1, force3d, TopAbs_SOLID );
2296 const SMDS_MeshNode* n56 = GetMediumNode( n5, n6, force3d, TopAbs_SOLID );
2297 const SMDS_MeshNode* n67 = GetMediumNode( n6, n7, force3d, TopAbs_SOLID );
2298 const SMDS_MeshNode* n78 = GetMediumNode( n7, n8, force3d, TopAbs_SOLID );
2299 const SMDS_MeshNode* n85 = GetMediumNode( n8, n5, force3d, TopAbs_SOLID );
2301 const SMDS_MeshNode* n15 = GetMediumNode( n1, n5, force3d, TopAbs_SOLID );
2302 const SMDS_MeshNode* n26 = GetMediumNode( n2, n6, force3d, TopAbs_SOLID );
2303 const SMDS_MeshNode* n37 = GetMediumNode( n3, n7, force3d, TopAbs_SOLID );
2304 const SMDS_MeshNode* n48 = GetMediumNode( n4, n8, force3d, TopAbs_SOLID );
2305 if ( myCreateBiQuadratic )
2307 const SMDS_MeshNode* n1234 = GetCentralNode( n1,n2,n3,n4,n12,n23,n34,n41,force3d );
2308 const SMDS_MeshNode* n1256 = GetCentralNode( n1,n2,n5,n6,n12,n26,n56,n15,force3d );
2309 const SMDS_MeshNode* n2367 = GetCentralNode( n2,n3,n6,n7,n23,n37,n67,n26,force3d );
2310 const SMDS_MeshNode* n3478 = GetCentralNode( n3,n4,n7,n8,n34,n48,n78,n37,force3d );
2311 const SMDS_MeshNode* n1458 = GetCentralNode( n1,n4,n5,n8,n41,n48,n15,n85,force3d );
2312 const SMDS_MeshNode* n5678 = GetCentralNode( n5,n6,n7,n8,n56,n67,n78,n85,force3d );
2314 vector<gp_XYZ> pointsOnShapes( SMESH_Block::ID_Shell );
2316 pointsOnShapes[ SMESH_Block::ID_V000 ] = SMESH_TNodeXYZ( n4 );
2317 pointsOnShapes[ SMESH_Block::ID_V100 ] = SMESH_TNodeXYZ( n8 );
2318 pointsOnShapes[ SMESH_Block::ID_V010 ] = SMESH_TNodeXYZ( n3 );
2319 pointsOnShapes[ SMESH_Block::ID_V110 ] = SMESH_TNodeXYZ( n7 );
2320 pointsOnShapes[ SMESH_Block::ID_V001 ] = SMESH_TNodeXYZ( n1 );
2321 pointsOnShapes[ SMESH_Block::ID_V101 ] = SMESH_TNodeXYZ( n5 );
2322 pointsOnShapes[ SMESH_Block::ID_V011 ] = SMESH_TNodeXYZ( n2 );
2323 pointsOnShapes[ SMESH_Block::ID_V111 ] = SMESH_TNodeXYZ( n6 );
2325 pointsOnShapes[ SMESH_Block::ID_Ex00 ] = SMESH_TNodeXYZ( n48 );
2326 pointsOnShapes[ SMESH_Block::ID_Ex10 ] = SMESH_TNodeXYZ( n37 );
2327 pointsOnShapes[ SMESH_Block::ID_E0y0 ] = SMESH_TNodeXYZ( n15 );
2328 pointsOnShapes[ SMESH_Block::ID_E1y0 ] = SMESH_TNodeXYZ( n26 );
2329 pointsOnShapes[ SMESH_Block::ID_Ex01 ] = SMESH_TNodeXYZ( n34 );
2330 pointsOnShapes[ SMESH_Block::ID_Ex11 ] = SMESH_TNodeXYZ( n78 );
2331 pointsOnShapes[ SMESH_Block::ID_E0y1 ] = SMESH_TNodeXYZ( n12 );
2332 pointsOnShapes[ SMESH_Block::ID_E1y1 ] = SMESH_TNodeXYZ( n56 );
2333 pointsOnShapes[ SMESH_Block::ID_E00z ] = SMESH_TNodeXYZ( n41 );
2334 pointsOnShapes[ SMESH_Block::ID_E10z ] = SMESH_TNodeXYZ( n85 );
2335 pointsOnShapes[ SMESH_Block::ID_E01z ] = SMESH_TNodeXYZ( n23 );
2336 pointsOnShapes[ SMESH_Block::ID_E11z ] = SMESH_TNodeXYZ( n67 );
2338 pointsOnShapes[ SMESH_Block::ID_Fxy0 ] = SMESH_TNodeXYZ( n3478 );
2339 pointsOnShapes[ SMESH_Block::ID_Fxy1 ] = SMESH_TNodeXYZ( n1256 );
2340 pointsOnShapes[ SMESH_Block::ID_Fx0z ] = SMESH_TNodeXYZ( n1458 );
2341 pointsOnShapes[ SMESH_Block::ID_Fx1z ] = SMESH_TNodeXYZ( n2367 );
2342 pointsOnShapes[ SMESH_Block::ID_F0yz ] = SMESH_TNodeXYZ( n1234 );
2343 pointsOnShapes[ SMESH_Block::ID_F1yz ] = SMESH_TNodeXYZ( n5678 );
2345 gp_XYZ centerCube(0.5, 0.5, 0.5);
2347 SMESH_Block::ShellPoint( centerCube, pointsOnShapes, nCenterElem );
2348 const SMDS_MeshNode* nCenter =
2349 meshDS->AddNode( nCenterElem.X(), nCenterElem.Y(), nCenterElem.Z() );
2350 meshDS->SetNodeInVolume( nCenter, myShapeID );
2353 elem = meshDS->AddVolumeWithID(n1, n2, n3, n4, n5, n6, n7, n8,
2354 n12, n23, n34, n41, n56, n67,
2355 n78, n85, n15, n26, n37, n48,
2356 n1234, n1256, n2367, n3478, n1458, n5678, nCenter, id);
2358 elem = meshDS->AddVolume(n1, n2, n3, n4, n5, n6, n7, n8,
2359 n12, n23, n34, n41, n56, n67,
2360 n78, n85, n15, n26, n37, n48,
2361 n1234, n1256, n2367, n3478, n1458, n5678, nCenter);
2366 elem = meshDS->AddVolumeWithID(n1, n2, n3, n4, n5, n6, n7, n8,
2367 n12, n23, n34, n41, n56, n67,
2368 n78, n85, n15, n26, n37, n48, id);
2370 elem = meshDS->AddVolume(n1, n2, n3, n4, n5, n6, n7, n8,
2371 n12, n23, n34, n41, n56, n67,
2372 n78, n85, n15, n26, n37, n48);
2375 if ( mySetElemOnShape && myShapeID > 0 )
2376 meshDS->SetMeshElementOnShape( elem, myShapeID );
2381 //=======================================================================
2382 //function : AddVolume
2383 //purpose : Creates LINEAR!!!!!!!!! octahedron
2384 //=======================================================================
2386 SMDS_MeshVolume* SMESH_MesherHelper::AddVolume(const SMDS_MeshNode* n1,
2387 const SMDS_MeshNode* n2,
2388 const SMDS_MeshNode* n3,
2389 const SMDS_MeshNode* n4,
2390 const SMDS_MeshNode* n5,
2391 const SMDS_MeshNode* n6,
2392 const SMDS_MeshNode* n7,
2393 const SMDS_MeshNode* n8,
2394 const SMDS_MeshNode* n9,
2395 const SMDS_MeshNode* n10,
2396 const SMDS_MeshNode* n11,
2397 const SMDS_MeshNode* n12,
2401 SMESHDS_Mesh * meshDS = GetMeshDS();
2402 SMDS_MeshVolume* elem = 0;
2404 elem = meshDS->AddVolumeWithID(n1,n2,n3,n4,n5,n6,n7,n8,n9,n10,n11,n12,id);
2406 elem = meshDS->AddVolume(n1,n2,n3,n4,n5,n6,n7,n8,n9,n10,n11,n12);
2407 if ( mySetElemOnShape && myShapeID > 0 )
2408 meshDS->SetMeshElementOnShape( elem, myShapeID );
2412 //=======================================================================
2413 //function : AddPolyhedralVolume
2414 //purpose : Creates polyhedron. In quadratic mesh, adds medium nodes
2415 //=======================================================================
2418 SMESH_MesherHelper::AddPolyhedralVolume (const std::vector<const SMDS_MeshNode*>& nodes,
2419 const std::vector<int>& quantities,
2423 SMESHDS_Mesh * meshDS = GetMeshDS();
2424 SMDS_MeshVolume* elem = 0;
2425 if(!myCreateQuadratic)
2428 elem = meshDS->AddPolyhedralVolumeWithID(nodes, quantities, id);
2430 elem = meshDS->AddPolyhedralVolume(nodes, quantities);
2434 vector<const SMDS_MeshNode*> newNodes;
2435 vector<int> newQuantities;
2436 for ( size_t iFace = 0, iN = 0; iFace < quantities.size(); ++iFace )
2438 int nbNodesInFace = quantities[iFace];
2439 newQuantities.push_back(0);
2440 for ( int i = 0; i < nbNodesInFace; ++i )
2442 const SMDS_MeshNode* n1 = nodes[ iN + i ];
2443 newNodes.push_back( n1 );
2444 newQuantities.back()++;
2446 const SMDS_MeshNode* n2 = nodes[ iN + ( i+1==nbNodesInFace ? 0 : i+1 )];
2447 // if ( n1->GetPosition()->GetTypeOfPosition() != SMDS_TOP_3DSPACE &&
2448 // n2->GetPosition()->GetTypeOfPosition() != SMDS_TOP_3DSPACE )
2450 const SMDS_MeshNode* n12 = GetMediumNode( n1, n2, force3d, TopAbs_SOLID );
2451 newNodes.push_back( n12 );
2452 newQuantities.back()++;
2455 iN += nbNodesInFace;
2458 elem = meshDS->AddPolyhedralVolumeWithID( newNodes, newQuantities, id );
2460 elem = meshDS->AddPolyhedralVolume( newNodes, newQuantities );
2462 if ( mySetElemOnShape && myShapeID > 0 )
2463 meshDS->SetMeshElementOnShape( elem, myShapeID );
2470 //================================================================================
2472 * \brief Check if a node belongs to any face of sub-mesh
2474 //================================================================================
2476 bool isNodeInSubMesh( const SMDS_MeshNode* n, const SMESHDS_SubMesh* sm )
2478 SMDS_ElemIteratorPtr fIt = n->GetInverseElementIterator( SMDSAbs_Face );
2479 while ( fIt->more() )
2480 if ( sm->Contains( fIt->next() ))
2486 //=======================================================================
2487 //function : IsSameElemGeometry
2488 //purpose : Returns true if all elements of a sub-mesh are of same shape
2489 //=======================================================================
2491 bool SMESH_MesherHelper::IsSameElemGeometry(const SMESHDS_SubMesh* smDS,
2492 SMDSAbs_GeometryType shape,
2493 const bool nullSubMeshRes)
2495 if ( !smDS ) return nullSubMeshRes;
2497 SMDS_ElemIteratorPtr elemIt = smDS->GetElements();
2498 while ( elemIt->more() ) {
2499 const SMDS_MeshElement* e = elemIt->next();
2500 if ( e->GetGeomType() != shape )
2506 //=======================================================================
2507 //function : LoadNodeColumns
2508 //purpose : Load nodes bound to face into a map of node columns
2509 //=======================================================================
2511 bool SMESH_MesherHelper::LoadNodeColumns(TParam2ColumnMap & theParam2ColumnMap,
2512 const TopoDS_Face& theFace,
2513 const TopoDS_Edge& theBaseEdge,
2514 SMESHDS_Mesh* theMesh,
2515 SMESH_ProxyMesh* theProxyMesh)
2517 return LoadNodeColumns(theParam2ColumnMap,
2519 std::list<TopoDS_Edge>(1,theBaseEdge),
2524 //=======================================================================
2525 //function : LoadNodeColumns
2526 //purpose : Load nodes bound to face into a map of node columns
2527 //=======================================================================
2529 bool SMESH_MesherHelper::LoadNodeColumns(TParam2ColumnMap & theParam2ColumnMap,
2530 const TopoDS_Face& theFace,
2531 const std::list<TopoDS_Edge>& theBaseSide,
2532 SMESHDS_Mesh* theMesh,
2533 SMESH_ProxyMesh* theProxyMesh)
2535 // get a right sub-mesh of theFace
2537 const SMESHDS_SubMesh* faceSubMesh = 0;
2540 faceSubMesh = theProxyMesh->GetSubMesh( theFace );
2541 if ( !faceSubMesh ||
2542 faceSubMesh->NbElements() == 0 ||
2543 theProxyMesh->IsTemporary( faceSubMesh->GetElements()->next() ))
2545 // can use a proxy sub-mesh with not temporary elements only
2551 faceSubMesh = theMesh->MeshElements( theFace );
2552 if ( !faceSubMesh || faceSubMesh->NbElements() == 0 )
2555 if ( theParam2ColumnMap.empty() )
2557 // get data of edges for normalization of params
2558 vector< double > length;
2560 list<TopoDS_Edge>::const_iterator edge;
2562 for ( edge = theBaseSide.begin(); edge != theBaseSide.end(); ++edge )
2564 double len = std::max( 1e-10, SMESH_Algo::EdgeLength( *edge ));
2566 length.push_back( len );
2570 // get nodes on theBaseEdge sorted by param on edge and initialize theParam2ColumnMap with them
2571 edge = theBaseSide.begin();
2572 for ( int iE = 0; edge != theBaseSide.end(); ++edge, ++iE )
2574 map< double, const SMDS_MeshNode*> sortedBaseNN;
2575 SMESH_Algo::GetSortedNodesOnEdge( theMesh, *edge,/*noMedium=*/true, sortedBaseNN );
2577 map< double, const SMDS_MeshNode*>::iterator u_n;
2578 // pb with mesh_Projection_2D_00/A1 fixed by adding expectedSupport arg to GetMediumPos()
2579 // so the following solution is commented (hope forever :)
2581 // SMESH_Algo::GetSortedNodesOnEdge( theMesh, *edge,/*noMedium=*/true, sortedBaseNN,
2582 // // SMDSAbs_Edge here is needed to be coherent with
2583 // // StdMeshers_FaceSide used by Quadrangle to get nodes
2584 // // on EDGE; else pb in mesh_Projection_2D_00/A1 where a
2585 // // medium node on EDGE is medium in a triangle but not
2588 // if ( faceSubMesh->GetElements()->next()->IsQuadratic() )
2589 // // filter off nodes medium in faces on theFace (same pb with mesh_Projection_2D_00/A1)
2590 // for ( u_n = sortedBaseNN.begin(); u_n != sortedBaseNN.end() ; )
2592 // const SMDS_MeshNode* node = u_n->second;
2593 // SMDS_ElemIteratorPtr faceIt = node->GetInverseElementIterator( SMDSAbs_Face );
2594 // if ( faceIt->more() && node ) {
2595 // const SMDS_MeshElement* face = faceIt->next();
2596 // if ( faceSubMesh->Contains( face ) && face->IsMediumNode( node ))
2600 // sortedBaseNN.erase( u_n++ );
2604 if ( sortedBaseNN.empty() ) continue;
2606 u_n = sortedBaseNN.begin();
2607 if ( theProxyMesh ) // from sortedBaseNN remove nodes not shared by faces of faceSubMesh
2609 const SMDS_MeshNode* n1 = (++sortedBaseNN.begin())->second;
2610 const SMDS_MeshNode* n2 = (++sortedBaseNN.rbegin())->second;
2611 bool allNodesAreProxy = ( n1 != theProxyMesh->GetProxyNode( n1 ) &&
2612 n2 != theProxyMesh->GetProxyNode( n2 ));
2613 if ( allNodesAreProxy )
2614 for ( u_n = sortedBaseNN.begin(); u_n != sortedBaseNN.end(); u_n++ )
2615 u_n->second = theProxyMesh->GetProxyNode( u_n->second );
2617 if ( u_n = sortedBaseNN.begin(), !isNodeInSubMesh( u_n->second, faceSubMesh ))
2619 while ( ++u_n != sortedBaseNN.end() && !isNodeInSubMesh( u_n->second, faceSubMesh ));
2620 sortedBaseNN.erase( sortedBaseNN.begin(), u_n );
2622 if ( !sortedBaseNN.empty() )
2623 if ( u_n = --sortedBaseNN.end(), !isNodeInSubMesh( u_n->second, faceSubMesh ))
2625 while ( u_n != sortedBaseNN.begin() && !isNodeInSubMesh( (--u_n)->second, faceSubMesh ));
2626 sortedBaseNN.erase( ++u_n, sortedBaseNN.end() );
2628 if ( sortedBaseNN.empty() ) continue;
2632 BRep_Tool::Range( *edge, f, l );
2633 if ( edge->Orientation() == TopAbs_REVERSED ) std::swap( f, l );
2634 const double coeff = 1. / ( l - f ) * length[iE] / fullLen;
2635 const double prevPar = theParam2ColumnMap.empty() ? 0 : theParam2ColumnMap.rbegin()->first;
2636 for ( u_n = sortedBaseNN.begin(); u_n != sortedBaseNN.end(); u_n++ )
2638 double par = prevPar + coeff * ( u_n->first - f );
2639 TParam2ColumnMap::iterator u2nn =
2640 theParam2ColumnMap.insert( theParam2ColumnMap.end(), make_pair( par, TNodeColumn()));
2641 u2nn->second.push_back( u_n->second );
2644 if ( theParam2ColumnMap.size() < 2 )
2649 size_t prevNbRows = theParam2ColumnMap.begin()->second.size(); // current, at least 1 here
2650 size_t expectNbRows = faceSubMesh->NbElements() / ( theParam2ColumnMap.size()-1 ); // to be added
2652 // fill theParam2ColumnMap column by column by passing from nodes on
2653 // theBaseEdge up via mesh faces on theFace
2655 TParam2ColumnMap::iterator par_nVec_1, par_nVec_2;
2656 par_nVec_2 = theParam2ColumnMap.begin();
2657 par_nVec_1 = par_nVec_2++;
2658 TIDSortedElemSet emptySet, avoidSet;
2659 for ( ; par_nVec_2 != theParam2ColumnMap.end(); ++par_nVec_1, ++par_nVec_2 )
2661 vector<const SMDS_MeshNode*>& nCol1 = par_nVec_1->second;
2662 vector<const SMDS_MeshNode*>& nCol2 = par_nVec_2->second;
2663 nCol1.resize( prevNbRows + expectNbRows );
2664 nCol2.resize( prevNbRows + expectNbRows );
2666 int i1, i2; size_t foundNbRows = 0;
2667 const SMDS_MeshNode *n1 = nCol1[ prevNbRows-1 ];
2668 const SMDS_MeshNode *n2 = nCol2[ prevNbRows-1 ];
2669 // find face sharing node n1 and n2 and belonging to faceSubMesh
2670 while ( const SMDS_MeshElement* face =
2671 SMESH_MeshAlgos::FindFaceInSet( n1, n2, emptySet, avoidSet, &i1, &i2))
2673 if ( faceSubMesh->Contains( face ))
2675 int nbNodes = face->NbCornerNodes();
2678 if ( foundNbRows + 1 > expectNbRows )
2680 n1 = face->GetNode( (i2+2) % 4 ); // opposite corner of quadrangle face
2681 n2 = face->GetNode( (i1+2) % 4 );
2682 nCol1[ prevNbRows + foundNbRows] = n1;
2683 nCol2[ prevNbRows + foundNbRows] = n2;
2686 avoidSet.insert( face );
2688 if ((size_t) foundNbRows != expectNbRows )
2692 return ( theParam2ColumnMap.size() > 1 &&
2693 theParam2ColumnMap.begin()->second.size() == prevNbRows + expectNbRows );
2698 //================================================================================
2700 * \brief Return true if a node is at a corner of a 2D structured mesh of FACE
2702 //================================================================================
2704 bool isCornerOfStructure( const SMDS_MeshNode* n,
2705 const SMESHDS_SubMesh* faceSM,
2706 SMESH_MesherHelper& faceAnalyser )
2708 int nbFacesInSM = 0;
2710 SMDS_ElemIteratorPtr fIt = n->GetInverseElementIterator( SMDSAbs_Face );
2711 while ( fIt->more() )
2712 nbFacesInSM += faceSM->Contains( fIt->next() );
2714 if ( nbFacesInSM == 1 )
2717 if ( nbFacesInSM == 2 && n->GetPosition()->GetTypeOfPosition() == SMDS_TOP_VERTEX )
2719 return faceAnalyser.IsRealSeam( n->getshapeId() );
2725 //=======================================================================
2726 //function : IsStructured
2727 //purpose : Return true if 2D mesh on FACE is a structured rectangle
2728 //=======================================================================
2730 bool SMESH_MesherHelper::IsStructured( SMESH_subMesh* faceSM )
2732 SMESHDS_SubMesh* fSM = faceSM->GetSubMeshDS();
2733 if ( !fSM || fSM->NbElements() == 0 )
2736 list< TopoDS_Edge > edges;
2737 list< int > nbEdgesInWires;
2738 int nbWires = SMESH_Block::GetOrderedEdges( TopoDS::Face( faceSM->GetSubShape() ),
2739 edges, nbEdgesInWires );
2740 if ( nbWires != 1 /*|| nbEdgesInWires.front() != 4*/ ) // allow composite sides
2743 // algo: find corners of a structure and then analyze nb of faces and
2744 // length of structure sides
2746 SMESHDS_Mesh* meshDS = faceSM->GetFather()->GetMeshDS();
2747 SMESH_MesherHelper faceAnalyser( *faceSM->GetFather() );
2748 faceAnalyser.SetSubShape( faceSM->GetSubShape() );
2750 // rotate edges to get the first node being at corner
2751 // (in principle it's not necessary because so far none SALOME algo can make
2752 // such a structured mesh that all corner nodes are not on VERTEXes)
2753 bool isCorner = false;
2754 int nbRemainEdges = nbEdgesInWires.front();
2756 TopoDS_Vertex V = IthVertex( 0, edges.front() );
2757 isCorner = isCornerOfStructure( SMESH_Algo::VertexNode( V, meshDS ),
2760 edges.splice( edges.end(), edges, edges.begin() );
2764 while ( !isCorner && nbRemainEdges > 0 );
2769 // get all nodes from EDGEs
2770 list< const SMDS_MeshNode* > nodes;
2771 list< TopoDS_Edge >::iterator edge = edges.begin();
2772 for ( ; edge != edges.end(); ++edge )
2774 map< double, const SMDS_MeshNode* > u2Nodes;
2775 if ( !SMESH_Algo::GetSortedNodesOnEdge( meshDS, *edge,
2776 /*skipMedium=*/true, u2Nodes ))
2779 list< const SMDS_MeshNode* > edgeNodes;
2780 map< double, const SMDS_MeshNode* >::iterator u2n = u2Nodes.begin();
2781 for ( ; u2n != u2Nodes.end(); ++u2n )
2782 edgeNodes.push_back( u2n->second );
2783 if ( edge->Orientation() == TopAbs_REVERSED )
2784 edgeNodes.reverse();
2786 if ( !nodes.empty() && nodes.back() == edgeNodes.front() )
2787 edgeNodes.pop_front();
2788 nodes.splice( nodes.end(), edgeNodes, edgeNodes.begin(), edgeNodes.end() );
2791 // get length of structured sides
2792 vector<int> nbEdgesInSide;
2794 list< const SMDS_MeshNode* >::iterator n = ++nodes.begin();
2795 for ( ; n != nodes.end(); ++n )
2798 if ( isCornerOfStructure( *n, fSM, faceAnalyser )) {
2799 nbEdgesInSide.push_back( nbEdges );
2805 if ( nbEdgesInSide.size() != 4 )
2807 if ( nbEdgesInSide[0] != nbEdgesInSide[2] )
2809 if ( nbEdgesInSide[1] != nbEdgesInSide[3] )
2811 if ( nbEdgesInSide[0] * nbEdgesInSide[1] != fSM->NbElements() )
2817 //=======================================================================
2818 //function : IsDistorted2D
2819 //purpose : Return true if 2D mesh on FACE is ditorted
2820 //=======================================================================
2822 bool SMESH_MesherHelper::IsDistorted2D( SMESH_subMesh* faceSM,
2825 if ( !faceSM || faceSM->GetSubShape().ShapeType() != TopAbs_FACE )
2828 bool haveBadFaces = false;
2830 SMESH_MesherHelper helper( *faceSM->GetFather() );
2831 helper.SetSubShape( faceSM->GetSubShape() );
2833 const TopoDS_Face& F = TopoDS::Face( faceSM->GetSubShape() );
2834 SMESHDS_SubMesh* smDS = helper.GetMeshDS()->MeshElements( F );
2835 if ( !smDS || smDS->NbElements() == 0 ) return false;
2837 SMDS_ElemIteratorPtr faceIt = smDS->GetElements();
2838 double prevArea = 0;
2839 vector< const SMDS_MeshNode* > nodes;
2841 bool* toCheckUV = checkUV ? & checkUV : 0;
2842 while ( faceIt->more() && !haveBadFaces )
2844 const SMDS_MeshElement* face = faceIt->next();
2847 nodes.resize( face->NbCornerNodes() );
2848 SMDS_MeshElement::iterator n = face->begin_nodes();
2849 for ( size_t i = 0; i < nodes.size(); ++n, ++i )
2852 // avoid elems on degenarate shapes as UV on them can be wrong
2853 if ( helper.HasDegeneratedEdges() )
2855 bool isOnDegen = false;
2856 for ( size_t i = 0; ( i < nodes.size() && !isOnDegen ); ++i )
2857 isOnDegen = helper.IsDegenShape( nodes[ i ]->getshapeId() );
2861 // prepare to getting UVs
2862 const SMDS_MeshNode* inFaceNode = 0;
2863 if ( helper.HasSeam() ) {
2864 for ( size_t i = 0; ( i < nodes.size() && !inFaceNode ); ++i )
2865 if ( !helper.IsSeamShape( nodes[ i ]->getshapeId() ))
2866 inFaceNode = nodes[ i ];
2871 uv.resize( nodes.size() );
2872 for ( size_t i = 0; i < nodes.size(); ++i )
2873 uv[ i ] = helper.GetNodeUV( F, nodes[ i ], inFaceNode, toCheckUV );
2875 // compare orientation of triangles
2876 double faceArea = 0;
2877 for ( int iT = 0, nbT = nodes.size()-2; iT < nbT; ++iT )
2879 gp_XY v1 = uv[ iT+1 ] - uv[ 0 ];
2880 gp_XY v2 = uv[ iT+2 ] - uv[ 0 ];
2881 faceArea += v2 ^ v1;
2883 haveBadFaces = ( faceArea * prevArea < 0 );
2884 prevArea = faceArea;
2887 return haveBadFaces;
2890 //================================================================================
2892 * \brief Find out elements orientation on a geometrical face
2893 * \param theFace - The face correctly oriented in the shape being meshed
2894 * \retval bool - true if the face normal and the normal of first element
2895 * in the correspoding submesh point in different directions
2897 //================================================================================
2899 bool SMESH_MesherHelper::IsReversedSubMesh (const TopoDS_Face& theFace)
2901 if ( theFace.IsNull() )
2904 // find out orientation of a meshed face
2905 int faceID = GetMeshDS()->ShapeToIndex( theFace );
2906 TopoDS_Shape aMeshedFace = GetMeshDS()->IndexToShape( faceID );
2907 bool isReversed = ( theFace.Orientation() != aMeshedFace.Orientation() );
2909 const SMESHDS_SubMesh * aSubMeshDSFace = GetMeshDS()->MeshElements( faceID );
2910 if ( !aSubMeshDSFace )
2913 // find an element on a bounday of theFace
2914 SMDS_ElemIteratorPtr iteratorElem = aSubMeshDSFace->GetElements();
2915 const SMDS_MeshNode* nn[2];
2916 while ( iteratorElem->more() ) // loop on elements on theFace
2918 const SMDS_MeshElement* elem = iteratorElem->next();
2919 if ( ! elem ) continue;
2921 // look for 2 nodes on EDGE
2922 int nbNodes = elem->NbCornerNodes();
2923 nn[0] = elem->GetNode( nbNodes-1 );
2924 for ( int iN = 0; iN < nbNodes; ++iN )
2926 nn[1] = elem->GetNode( iN );
2927 if ( nn[0]->GetPosition()->GetDim() < 2 &&
2928 nn[1]->GetPosition()->GetDim() < 2 )
2930 TopoDS_Shape s0 = GetSubShapeByNode( nn[0], GetMeshDS() );
2931 TopoDS_Shape s1 = GetSubShapeByNode( nn[1], GetMeshDS() );
2932 TopoDS_Shape E = GetCommonAncestor( s0, s1, *myMesh, TopAbs_EDGE );
2933 if ( !E.IsNull() && !s0.IsSame( s1 ))
2937 for ( TopExp_Explorer exp( theFace, TopAbs_EDGE ); exp.More(); exp.Next() )
2938 if ( E.IsSame( exp.Current() )) {
2940 E = exp.Current(); // to know orientation
2945 double u0 = GetNodeU( TopoDS::Edge( E ), nn[0], nn[1], &ok );
2946 double u1 = GetNodeU( TopoDS::Edge( E ), nn[1], nn[0], &ok );
2949 // check that the 2 nodes are connected with a segment (IPAL53055)
2951 const SMDS_MeshElement* seg;
2952 if ( SMESHDS_SubMesh* sm = GetMeshDS()->MeshElements( E ))
2953 if (( sm->NbElements() > 0 ) &&
2954 ( seg = GetMeshDS()->FindEdge( nn[0], nn[1] )))
2955 ok = sm->Contains( seg );
2959 isReversed = ( u0 > u1 );
2960 if ( E.Orientation() == TopAbs_REVERSED )
2961 isReversed = !isReversed;
2971 // find an element with a good normal
2973 bool normalOK = false;
2975 iteratorElem = aSubMeshDSFace->GetElements();
2976 while ( !normalOK && iteratorElem->more() ) // loop on elements on theFace
2978 const SMDS_MeshElement* elem = iteratorElem->next();
2979 if ( ! SMESH_MeshAlgos::FaceNormal( elem, const_cast<gp_XYZ&>( Ne.XYZ() ), /*normalized=*/0 ))
2983 // get UV of a node inside theFACE
2984 SMDS_ElemIteratorPtr nodesIt = elem->nodesIterator();
2985 const SMDS_MeshNode* nInFace = 0;
2986 int iPosDim = SMDS_TOP_VERTEX;
2987 while ( nodesIt->more() ) // loop on nodes
2989 const SMDS_MeshNode* n = static_cast<const SMDS_MeshNode*>( nodesIt->next() );
2990 if ( n->GetPosition()->GetTypeOfPosition() >= iPosDim )
2993 iPosDim = n->GetPosition()->GetTypeOfPosition();
2996 uv = GetNodeUV( theFace, nInFace, 0, &normalOK );
3001 // face normal at node position
3002 TopLoc_Location loc;
3003 Handle(Geom_Surface) surf = BRep_Tool::Surface( theFace, loc );
3004 // if ( surf.IsNull() || surf->Continuity() < GeomAbs_C1 )
3005 // some surfaces not detected as GeomAbs_C1 are nevertheless correct for meshing
3006 if ( surf.IsNull() || surf->Continuity() < GeomAbs_C0 )
3009 gp_Vec d1u, d1v; gp_Pnt p;
3010 surf->D1( uv.X(), uv.Y(), p, d1u, d1v );
3011 gp_Vec Nf = (d1u ^ d1v).Transformed( loc );
3013 if ( theFace.Orientation() == TopAbs_REVERSED )
3016 return Ne * Nf < 0.;
3019 //=======================================================================
3021 //purpose : Count nb of sub-shapes
3022 //=======================================================================
3024 int SMESH_MesherHelper::Count(const TopoDS_Shape& shape,
3025 const TopAbs_ShapeEnum type,
3026 const bool ignoreSame)
3029 TopTools_IndexedMapOfShape map;
3030 TopExp::MapShapes( shape, type, map );
3031 return map.Extent();
3035 for ( TopExp_Explorer exp( shape, type ); exp.More(); exp.Next() )
3041 //=======================================================================
3042 //function : NbAncestors
3043 //purpose : Return number of unique ancestors of the shape
3044 //=======================================================================
3046 int SMESH_MesherHelper::NbAncestors(const TopoDS_Shape& shape,
3047 const SMESH_Mesh& mesh,
3048 TopAbs_ShapeEnum ancestorType/*=TopAbs_SHAPE*/)
3050 TopTools_MapOfShape ancestors;
3051 TopTools_ListIteratorOfListOfShape ansIt( mesh.GetAncestors(shape) );
3052 for ( ; ansIt.More(); ansIt.Next() ) {
3053 if ( ancestorType == TopAbs_SHAPE || ansIt.Value().ShapeType() == ancestorType )
3054 ancestors.Add( ansIt.Value() );
3056 return ancestors.Extent();
3059 //=======================================================================
3060 //function : GetSubShapeOri
3061 //purpose : Return orientation of sub-shape in the main shape
3062 //=======================================================================
3064 TopAbs_Orientation SMESH_MesherHelper::GetSubShapeOri(const TopoDS_Shape& shape,
3065 const TopoDS_Shape& subShape)
3067 TopAbs_Orientation ori = TopAbs_Orientation(-1);
3068 if ( !shape.IsNull() && !subShape.IsNull() )
3070 TopExp_Explorer e( shape, subShape.ShapeType() );
3071 if ( shape.Orientation() >= TopAbs_INTERNAL ) // TopAbs_INTERNAL or TopAbs_EXTERNAL
3072 e.Init( shape.Oriented(TopAbs_FORWARD), subShape.ShapeType() );
3073 for ( ; e.More(); e.Next())
3074 if ( subShape.IsSame( e.Current() ))
3077 ori = e.Current().Orientation();
3082 //=======================================================================
3083 //function : IsSubShape
3085 //=======================================================================
3087 bool SMESH_MesherHelper::IsSubShape( const TopoDS_Shape& shape,
3088 const TopoDS_Shape& mainShape )
3090 if ( !shape.IsNull() && !mainShape.IsNull() )
3092 for ( TopExp_Explorer exp( mainShape, shape.ShapeType());
3095 if ( shape.IsSame( exp.Current() ))
3101 //=======================================================================
3102 //function : IsSubShape
3104 //=======================================================================
3106 bool SMESH_MesherHelper::IsSubShape( const TopoDS_Shape& shape, SMESH_Mesh* aMesh )
3108 if ( shape.IsNull() || !aMesh )
3111 aMesh->GetMeshDS()->ShapeToIndex( shape ) ||
3113 (shape.ShapeType() == TopAbs_COMPOUND && aMesh->GetMeshDS()->IsGroupOfSubShapes( shape ));
3116 //=======================================================================
3117 //function : IsBlock
3119 //=======================================================================
3121 bool SMESH_MesherHelper::IsBlock( const TopoDS_Shape& shape )
3123 if ( shape.IsNull() )
3127 TopExp_Explorer exp( shape, TopAbs_SHELL );
3128 if ( !exp.More() ) return false;
3129 shell = TopoDS::Shell( exp.Current() );
3130 if ( exp.Next(), exp.More() ) return false;
3133 TopTools_IndexedMapOfOrientedShape map;
3134 return SMESH_Block::FindBlockShapes( shell, v, v, map );
3138 //================================================================================
3140 * \brief Return maximal tolerance of shape
3142 //================================================================================
3144 double SMESH_MesherHelper::MaxTolerance( const TopoDS_Shape& shape )
3146 double tol = Precision::Confusion();
3147 TopExp_Explorer exp;
3148 for ( exp.Init( shape, TopAbs_FACE ); exp.More(); exp.Next() )
3149 tol = Max( tol, BRep_Tool::Tolerance( TopoDS::Face( exp.Current())));
3150 for ( exp.Init( shape, TopAbs_EDGE ); exp.More(); exp.Next() )
3151 tol = Max( tol, BRep_Tool::Tolerance( TopoDS::Edge( exp.Current())));
3152 for ( exp.Init( shape, TopAbs_VERTEX ); exp.More(); exp.Next() )
3153 tol = Max( tol, BRep_Tool::Tolerance( TopoDS::Vertex( exp.Current())));
3158 //================================================================================
3160 * \brief Return MaxTolerance( face ), probably cached
3162 //================================================================================
3164 double SMESH_MesherHelper::getFaceMaxTol( const TopoDS_Shape& face ) const
3166 int faceID = GetMeshDS()->ShapeToIndex( face );
3168 SMESH_MesherHelper* me = const_cast< SMESH_MesherHelper* >( this );
3169 double & tol = me->myFaceMaxTol.insert( make_pair( faceID, -1. )).first->second;
3171 tol = MaxTolerance( face );
3176 //================================================================================
3178 * \brief Return an angle between two EDGEs sharing a common VERTEX with reference
3179 * of the FACE normal
3180 * \return double - the angle (between -Pi and Pi), negative if the angle is concave,
3181 * 1e100 in case of failure
3182 * \waring Care about order of the EDGEs and their orientation to be as they are
3183 * within the FACE! Don't pass degenerated EDGEs neither!
3185 //================================================================================
3187 double SMESH_MesherHelper::GetAngle( const TopoDS_Edge & theE1,
3188 const TopoDS_Edge & theE2,
3189 const TopoDS_Face & theFace,
3190 const TopoDS_Vertex & theCommonV,
3191 gp_Vec* theFaceNormal)
3193 double angle = 1e100;
3197 Handle(Geom_Curve) c1 = BRep_Tool::Curve( theE1, f,l );
3198 Handle(Geom_Curve) c2 = BRep_Tool::Curve( theE2, f,l );
3199 Handle(Geom2d_Curve) c2d1 = BRep_Tool::CurveOnSurface( theE1, theFace, f,l );
3200 Handle(Geom_Surface) surf = BRep_Tool::Surface( theFace );
3201 double p1 = BRep_Tool::Parameter( theCommonV, theE1 );
3202 double p2 = BRep_Tool::Parameter( theCommonV, theE2 );
3203 if ( c1.IsNull() || c2.IsNull() )
3205 gp_XY uv = c2d1->Value( p1 ).XY();
3206 gp_Vec du, dv; gp_Pnt p;
3207 surf->D1( uv.X(), uv.Y(), p, du, dv );
3208 gp_Vec vec1, vec2, vecRef = du ^ dv;
3211 while ( vecRef.SquareMagnitude() < 1e-25 )
3213 double dp = ( l - f ) / 1000.;
3214 p1tmp += dp * (( Abs( p1 - f ) > Abs( p1 - l )) ? -1. : +1.);
3215 uv = c2d1->Value( p1tmp ).XY();
3216 surf->D1( uv.X(), uv.Y(), p, du, dv );
3218 if ( ++nbLoops > 10 )
3221 cout << "SMESH_MesherHelper::GetAngle(): Captured in a sigularity" << endl;
3226 if ( theFace.Orientation() == TopAbs_REVERSED )
3228 if ( theFaceNormal ) *theFaceNormal = vecRef;
3230 c1->D1( p1, p, vec1 );
3231 c2->D1( p2, p, vec2 );
3232 // TopoDS_Face F = theFace;
3233 // if ( F.Orientation() == TopAbs_INTERNAL )
3234 // F.Orientation( TopAbs_FORWARD );
3235 if ( theE1.Orientation() /*GetSubShapeOri( F, theE1 )*/ == TopAbs_REVERSED )
3237 if ( theE2.Orientation() /*GetSubShapeOri( F, theE2 )*/ == TopAbs_REVERSED )
3239 angle = vec1.AngleWithRef( vec2, vecRef );
3241 if ( Abs ( angle ) >= 0.99 * M_PI )
3243 BRep_Tool::Range( theE1, f, l );
3244 p1 += 1e-7 * ( p1-f < l-p1 ? +1. : -1. );
3245 c1->D1( p1, p, vec1 );
3246 if ( theE1.Orientation() == TopAbs_REVERSED )
3248 BRep_Tool::Range( theE2, f, l );
3249 p2 += 1e-7 * ( p2-f < l-p2 ? +1. : -1. );
3250 c2->D1( p2, p, vec2 );
3251 if ( theE2.Orientation() == TopAbs_REVERSED )
3253 angle = vec1.AngleWithRef( vec2, vecRef );
3262 //================================================================================
3264 * \brief Check if the first and last vertices of an edge are the same
3265 * \param anEdge - the edge to check
3266 * \retval bool - true if same
3268 //================================================================================
3270 bool SMESH_MesherHelper::IsClosedEdge( const TopoDS_Edge& anEdge )
3272 if ( anEdge.Orientation() >= TopAbs_INTERNAL )
3273 return IsClosedEdge( TopoDS::Edge( anEdge.Oriented( TopAbs_FORWARD )));
3274 return TopExp::FirstVertex( anEdge ).IsSame( TopExp::LastVertex( anEdge ));
3277 //================================================================================
3279 * \brief Wrapper over TopExp::FirstVertex() and TopExp::LastVertex() fixing them
3280 * in the case of INTERNAL edge
3282 //================================================================================
3284 TopoDS_Vertex SMESH_MesherHelper::IthVertex( const bool is2nd,
3288 if ( anEdge.Orientation() >= TopAbs_INTERNAL )
3289 anEdge.Orientation( TopAbs_FORWARD );
3291 const TopAbs_Orientation tgtOri = is2nd ? TopAbs_REVERSED : TopAbs_FORWARD;
3292 TopoDS_Iterator vIt( anEdge, CumOri );
3293 while ( vIt.More() && vIt.Value().Orientation() != tgtOri )
3296 return ( vIt.More() ? TopoDS::Vertex(vIt.Value()) : TopoDS_Vertex() );
3299 //================================================================================
3301 * \brief Return type of shape contained in a group
3302 * \param group - a shape of type TopAbs_COMPOUND
3303 * \param avoidCompound - not to return TopAbs_COMPOUND
3305 //================================================================================
3307 TopAbs_ShapeEnum SMESH_MesherHelper::GetGroupType(const TopoDS_Shape& group,
3308 const bool avoidCompound)
3310 if ( !group.IsNull() )
3312 if ( group.ShapeType() != TopAbs_COMPOUND )
3313 return group.ShapeType();
3315 // iterate on a compound
3316 TopoDS_Iterator it( group );
3318 return avoidCompound ? GetGroupType( it.Value() ) : it.Value().ShapeType();
3320 return TopAbs_SHAPE;
3323 //================================================================================
3325 * \brief Returns a shape, to which a hypothesis used to mesh a given shape is assigned
3326 * \param [in] hyp - the hypothesis
3327 * \param [in] shape - the shape, for meshing which the \a hyp is used
3328 * \param [in] mesh - the mesh
3329 * \return TopoDS_Shape - the shape the \a hyp is assigned to
3331 //================================================================================
3333 TopoDS_Shape SMESH_MesherHelper::GetShapeOfHypothesis( const SMESHDS_Hypothesis * hyp,
3334 const TopoDS_Shape& shape,
3337 const SMESH_Hypothesis* h = static_cast<const SMESH_Hypothesis*>( hyp );
3338 SMESH_HypoFilter hypFilter( SMESH_HypoFilter::Is( h ));
3340 TopoDS_Shape shapeOfHyp;
3341 mesh->GetHypothesis( shape, hypFilter, /*checkAncestors=*/true, &shapeOfHyp );
3345 //=======================================================================
3346 //function : IsQuadraticMesh
3347 //purpose : Check mesh without geometry for: if all elements on this shape are quadratic,
3348 // quadratic elements will be created.
3349 // Used then generated 3D mesh without geometry.
3350 //=======================================================================
3352 SMESH_MesherHelper:: MType SMESH_MesherHelper::IsQuadraticMesh()
3354 int NbAllEdgsAndFaces=0;
3355 int NbQuadFacesAndEdgs=0;
3356 int NbFacesAndEdges=0;
3357 //All faces and edges
3358 NbAllEdgsAndFaces = myMesh->NbEdges() + myMesh->NbFaces();
3359 if ( NbAllEdgsAndFaces == 0 )
3360 return SMESH_MesherHelper::LINEAR;
3362 //Quadratic faces and edges
3363 NbQuadFacesAndEdgs = myMesh->NbEdges(ORDER_QUADRATIC) + myMesh->NbFaces(ORDER_QUADRATIC);
3365 //Linear faces and edges
3366 NbFacesAndEdges = myMesh->NbEdges(ORDER_LINEAR) + myMesh->NbFaces(ORDER_LINEAR);
3368 if (NbAllEdgsAndFaces == NbQuadFacesAndEdgs) {
3370 return SMESH_MesherHelper::QUADRATIC;
3372 else if (NbAllEdgsAndFaces == NbFacesAndEdges) {
3374 return SMESH_MesherHelper::LINEAR;
3377 //Mesh with both type of elements
3378 return SMESH_MesherHelper::COMP;
3381 //=======================================================================
3382 //function : GetOtherParam
3383 //purpose : Return an alternative parameter for a node on seam
3384 //=======================================================================
3386 double SMESH_MesherHelper::GetOtherParam(const double param) const
3388 int i = myParIndex & U_periodic ? 0 : 1;
3389 return fabs(param-myPar1[i]) < fabs(param-myPar2[i]) ? myPar2[i] : myPar1[i];
3394 //=======================================================================
3396 * \brief Iterator on ancestors of the given type
3398 //=======================================================================
3400 struct TAncestorsIterator : public SMDS_Iterator<const TopoDS_Shape*>
3402 TopTools_ListIteratorOfListOfShape _ancIter;
3403 TopAbs_ShapeEnum _type;
3404 TopTools_MapOfShape _encountered;
3405 TAncestorsIterator( const TopTools_ListOfShape& ancestors, TopAbs_ShapeEnum type)
3406 : _ancIter( ancestors ), _type( type )
3408 if ( _ancIter.More() ) {
3409 if ( _ancIter.Value().ShapeType() != _type ) next();
3410 else _encountered.Add( _ancIter.Value() );
3415 return _ancIter.More();
3417 virtual const TopoDS_Shape* next()
3419 const TopoDS_Shape* s = _ancIter.More() ? & _ancIter.Value() : 0;
3420 if ( _ancIter.More() )
3421 for ( _ancIter.Next(); _ancIter.More(); _ancIter.Next())
3422 if ( _ancIter.Value().ShapeType() == _type && _encountered.Add( _ancIter.Value() ))
3430 //=======================================================================
3432 * \brief Return iterator on ancestors of the given type
3434 //=======================================================================
3436 PShapeIteratorPtr SMESH_MesherHelper::GetAncestors(const TopoDS_Shape& shape,
3437 const SMESH_Mesh& mesh,
3438 TopAbs_ShapeEnum ancestorType)
3440 return PShapeIteratorPtr( new TAncestorsIterator( mesh.GetAncestors(shape), ancestorType));
3443 //=======================================================================
3444 //function : GetCommonAncestor
3445 //purpose : Find a common ancestors of two shapes of the given type
3446 //=======================================================================
3448 TopoDS_Shape SMESH_MesherHelper::GetCommonAncestor(const TopoDS_Shape& shape1,
3449 const TopoDS_Shape& shape2,
3450 const SMESH_Mesh& mesh,
3451 TopAbs_ShapeEnum ancestorType)
3453 TopoDS_Shape commonAnc;
3454 if ( !shape1.IsNull() && !shape2.IsNull() )
3456 if ( shape1.ShapeType() == ancestorType && IsSubShape( shape2, shape1 ))
3458 if ( shape2.ShapeType() == ancestorType && IsSubShape( shape1, shape2 ))
3461 PShapeIteratorPtr ancIt = GetAncestors( shape1, mesh, ancestorType );
3462 while ( const TopoDS_Shape* anc = ancIt->next() )
3463 if ( IsSubShape( shape2, *anc ))
3472 //#include <Perf_Meter.hxx>
3474 //=======================================================================
3475 namespace { // Structures used by FixQuadraticElements()
3476 //=======================================================================
3478 #define __DMP__(txt) \
3480 #define MSG(txt) __DMP__(txt<<endl)
3481 #define MSGBEG(txt) __DMP__(txt)
3483 //const double straightTol2 = 1e-33; // to detect straing links
3484 bool isStraightLink(double linkLen2, double middleNodeMove2)
3486 // straight if <node move> < 1/15 * <link length>
3487 return middleNodeMove2 < 1/15./15. * linkLen2;
3491 // ---------------------------------------
3493 * \brief Quadratic link knowing its faces
3495 struct QLink: public SMESH_TLink
3497 const SMDS_MeshNode* _mediumNode;
3498 mutable vector<const QFace* > _faces;
3499 mutable gp_Vec _nodeMove;
3500 mutable int _nbMoves;
3501 mutable bool _is2dFixed; // is moved along surface or in 3D
3503 QLink(const SMDS_MeshNode* n1, const SMDS_MeshNode* n2, const SMDS_MeshNode* nm):
3504 SMESH_TLink( n1,n2 ), _mediumNode(nm), _nodeMove(0,0,0), _nbMoves(0) {
3506 _nodeMove = MediumPnt() - MiddlePnt();
3507 _is2dFixed = ( MediumPos() != SMDS_TOP_FACE );
3509 void SetContinuesFaces() const;
3510 const QFace* GetContinuesFace( const QFace* face ) const;
3511 bool OnBoundary() const;
3512 gp_XYZ MiddlePnt() const { return ( XYZ( node1() ) + XYZ( node2() )) / 2.; }
3513 gp_XYZ MediumPnt() const { return XYZ( _mediumNode ); }
3515 SMDS_TypeOfPosition MediumPos() const
3516 { return _mediumNode->GetPosition()->GetTypeOfPosition(); }
3517 SMDS_TypeOfPosition EndPos(bool isSecond) const
3518 { return (isSecond ? node2() : node1())->GetPosition()->GetTypeOfPosition(); }
3519 const SMDS_MeshNode* EndPosNode(SMDS_TypeOfPosition pos) const
3520 { return EndPos(0) == pos ? node1() : EndPos(1) == pos ? node2() : 0; }
3522 void Move(const gp_Vec& move, bool sum=false, bool is2dFixed=false) const
3523 { _nodeMove += move; _nbMoves += sum ? (_nbMoves==0) : 1; _is2dFixed |= is2dFixed; }
3524 gp_XYZ Move() const { return _nodeMove.XYZ() / _nbMoves; }
3525 bool IsMoved() const { return (_nbMoves > 0 /*&& !IsStraight()*/); }
3526 bool IsFixedOnSurface() const { return _is2dFixed; }
3527 bool IsStraight() const
3528 { return isStraightLink( (XYZ(node1())-XYZ(node2())).SquareModulus(),
3529 _nodeMove.SquareMagnitude());
3531 bool operator<(const QLink& other) const {
3532 return (node1()->GetID() == other.node1()->GetID() ?
3533 node2()->GetID() < other.node2()->GetID() :
3534 node1()->GetID() < other.node1()->GetID());
3536 // struct PtrComparator {
3537 // bool operator() (const QLink* l1, const QLink* l2 ) const { return *l1 < *l2; }
3540 // ---------------------------------------------------------
3542 * \brief Link in the chain of links; it connects two faces
3546 const QLink* _qlink;
3547 mutable const QFace* _qfaces[2];
3549 TChainLink(const QLink* qlink=0):_qlink(qlink) {
3550 _qfaces[0] = _qfaces[1] = 0;
3552 void SetFace(const QFace* face) const { int iF = _qfaces[0] ? 1 : 0; _qfaces[iF]=face; }
3554 bool IsBoundary() const { return !_qfaces[1]; }
3556 void RemoveFace( const QFace* face ) const
3557 { _qfaces[(face == _qfaces[1])] = 0; if (!_qfaces[0]) std::swap(_qfaces[0],_qfaces[1]); }
3559 const QFace* NextFace( const QFace* f ) const
3560 { return _qfaces[0]==f ? _qfaces[1] : _qfaces[0]; }
3562 const SMDS_MeshNode* NextNode( const SMDS_MeshNode* n ) const
3563 { return n == _qlink->node1() ? _qlink->node2() : _qlink->node1(); }
3565 bool operator<(const TChainLink& other) const { return *_qlink < *other._qlink; }
3567 operator bool() const { return (_qlink); }
3569 const QLink* operator->() const { return _qlink; }
3571 gp_Vec Normal() const;
3573 bool IsStraight() const;
3575 // --------------------------------------------------------------------
3576 typedef list< TChainLink > TChain;
3577 typedef set < TChainLink > TLinkSet;
3578 typedef TLinkSet::const_iterator TLinkInSet;
3580 const int theFirstStep = 5;
3582 enum { ERR_OK, ERR_TRI, ERR_PRISM, ERR_UNKNOWN }; // errors of QFace::GetLinkChain()
3583 // --------------------------------------------------------------------
3585 * \brief Quadratic face shared by two volumes and bound by QLinks
3587 struct QFace: public TIDSortedNodeSet
3589 mutable const SMDS_MeshElement* _volumes[2];
3590 mutable vector< const QLink* > _sides;
3591 mutable bool _sideIsAdded[4]; // added in chain of links
3594 mutable const SMDS_MeshElement* _face;
3597 QFace( const vector< const QLink*>& links, const SMDS_MeshElement* face=0 );
3599 void SetVolume(const SMDS_MeshElement* v) const { _volumes[ _volumes[0] ? 1 : 0 ] = v; }
3601 int NbVolumes() const { return !_volumes[0] ? 0 : !_volumes[1] ? 1 : 2; }
3603 void AddSelfToLinks() const {
3604 for ( size_t i = 0; i < _sides.size(); ++i )
3605 _sides[i]->_faces.push_back( this );
3607 int LinkIndex( const QLink* side ) const {
3608 for (size_t i = 0; i<_sides.size(); ++i ) if ( _sides[i] == side ) return i;
3611 bool GetLinkChain( int iSide, TChain& chain, SMDS_TypeOfPosition pos, int& err) const;
3613 bool GetLinkChain( TChainLink& link, TChain& chain, SMDS_TypeOfPosition pos, int& err) const
3615 int i = LinkIndex( link._qlink );
3616 if ( i < 0 ) return true;
3617 _sideIsAdded[i] = true;
3618 link.SetFace( this );
3619 // continue from opposite link
3620 return GetLinkChain( (i+2)%_sides.size(), chain, pos, err );
3622 bool IsBoundary() const { return !_volumes[1]; }
3624 bool Contains( const SMDS_MeshNode* node ) const { return count(node); }
3626 bool IsSpoiled(const QLink* bentLink ) const;
3628 TLinkInSet GetBoundaryLink( const TLinkSet& links,
3629 const TChainLink& avoidLink,
3630 TLinkInSet * notBoundaryLink = 0,
3631 const SMDS_MeshNode* nodeToContain = 0,
3632 bool * isAdjacentUsed = 0,
3633 int nbRecursionsLeft = -1) const;
3635 TLinkInSet GetLinkByNode( const TLinkSet& links,
3636 const TChainLink& avoidLink,
3637 const SMDS_MeshNode* nodeToContain) const;
3639 const SMDS_MeshNode* GetNodeInFace() const {
3640 for ( size_t iL = 0; iL < _sides.size(); ++iL )
3641 if ( _sides[iL]->MediumPos() == SMDS_TOP_FACE ) return _sides[iL]->_mediumNode;
3645 gp_Vec LinkNorm(const int i, SMESH_MesherHelper* theFaceHelper=0) const;
3647 double MoveByBoundary( const TChainLink& theLink,
3648 const gp_Vec& theRefVec,
3649 const TLinkSet& theLinks,
3650 SMESH_MesherHelper* theFaceHelper=0,
3651 const double thePrevLen=0,
3652 const int theStep=theFirstStep,
3653 gp_Vec* theLinkNorm=0,
3654 double theSign=1.0) const;
3657 //================================================================================
3659 * \brief Dump QLink and QFace
3661 ostream& operator << (ostream& out, const QLink& l)
3663 out <<"QLink nodes: "
3664 << l.node1()->GetID() << " - "
3665 << l._mediumNode->GetID() << " - "
3666 << l.node2()->GetID() << endl;
3669 ostream& operator << (ostream& out, const QFace& f)
3671 out <<"QFace nodes: "/*<< &f << " "*/;
3672 for ( TIDSortedNodeSet::const_iterator n = f.begin(); n != f.end(); ++n )
3673 out << (*n)->GetID() << " ";
3674 out << " \tvolumes: "
3675 << (f._volumes[0] ? f._volumes[0]->GetID() : 0) << " "
3676 << (f._volumes[1] ? f._volumes[1]->GetID() : 0);
3677 out << " \tNormal: "<< f._normal.X() <<", "<<f._normal.Y() <<", "<<f._normal.Z() << endl;
3681 //================================================================================
3683 * \brief Construct QFace from QLinks
3685 //================================================================================
3687 QFace::QFace( const vector< const QLink*>& links, const SMDS_MeshElement* face )
3689 _volumes[0] = _volumes[1] = 0;
3691 _sideIsAdded[0]=_sideIsAdded[1]=_sideIsAdded[2]=_sideIsAdded[3]=false;
3692 _normal.SetCoord(0,0,0);
3693 for ( size_t i = 1; i < _sides.size(); ++i ) {
3694 const QLink *l1 = _sides[i-1], *l2 = _sides[i];
3695 insert( l1->node1() ); insert( l1->node2() );
3697 gp_Vec v1( XYZ( l1->node2()), XYZ( l1->node1()));
3698 gp_Vec v2( XYZ( l2->node1()), XYZ( l2->node2()));
3699 if ( l1->node1() != l2->node1() && l1->node2() != l2->node2() )
3703 double normSqSize = _normal.SquareMagnitude();
3704 if ( normSqSize > numeric_limits<double>::min() )
3705 _normal /= sqrt( normSqSize );
3707 _normal.SetCoord(1e-33,0,0);
3713 //================================================================================
3715 * \brief Make up a chain of links
3716 * \param iSide - link to add first
3717 * \param chain - chain to fill in
3718 * \param pos - postion of medium nodes the links should have
3719 * \param error - out, specifies what is wrong
3720 * \retval bool - false if valid chain can't be built; "valid" means that links
3721 * of the chain belongs to rectangles bounding hexahedrons
3723 //================================================================================
3725 bool QFace::GetLinkChain( int iSide, TChain& chain, SMDS_TypeOfPosition pos, int& error) const
3727 if ( iSide >= (int)_sides.size() ) // wrong argument iSide
3729 if ( _sideIsAdded[ iSide ]) // already in chain
3732 if ( _sides.size() != 4 ) { // triangle - visit all my continous faces
3735 list< const QFace* > faces( 1, this );
3736 while ( !faces.empty() ) {
3737 const QFace* face = faces.front();
3738 for ( size_t i = 0; i < face->_sides.size(); ++i ) {
3739 if ( !face->_sideIsAdded[i] && face->_sides[i] ) {
3740 face->_sideIsAdded[i] = true;
3741 // find a face side in the chain
3742 TLinkInSet chLink = links.insert( TChainLink(face->_sides[i])).first;
3743 // TChain::iterator chLink = chain.begin();
3744 // for ( ; chLink != chain.end(); ++chLink )
3745 // if ( chLink->_qlink == face->_sides[i] )
3747 // if ( chLink == chain.end() )
3748 // chLink = chain.insert( chain.begin(), TChainLink(face->_sides[i]));
3749 // add a face to a chained link and put a continues face in the queue
3750 chLink->SetFace( face );
3751 if ( face->_sides[i]->MediumPos() == pos )
3752 if ( const QFace* contFace = face->_sides[i]->GetContinuesFace( face ))
3753 if ( contFace->_sides.size() == 3 )
3754 faces.push_back( contFace );
3759 if ( error < ERR_TRI )
3761 chain.insert( chain.end(), links.begin(),links.end() );
3764 _sideIsAdded[iSide] = true; // not to add this link to chain again
3765 const QLink* link = _sides[iSide];
3769 // add link into chain
3770 TChain::iterator chLink = chain.insert( chain.begin(), TChainLink(link));
3771 chLink->SetFace( this );
3774 // propagate from a quadrangle to neighbour faces
3775 if ( link->MediumPos() >= pos ) {
3776 int nbLinkFaces = link->_faces.size();
3777 if ( nbLinkFaces == 4 || (/*nbLinkFaces < 4 && */link->OnBoundary())) {
3778 // hexahedral mesh or boundary quadrangles - goto a continous face
3779 if ( const QFace* f = link->GetContinuesFace( this ))
3780 if ( f->_sides.size() == 4 )
3781 return f->GetLinkChain( *chLink, chain, pos, error );
3784 TChainLink chLink(link); // side face of prismatic mesh - visit all faces of iSide
3785 for ( int i = 0; i < nbLinkFaces; ++i )
3786 if ( link->_faces[i] )
3787 link->_faces[i]->GetLinkChain( chLink, chain, pos, error );
3788 if ( error < ERR_PRISM )
3796 //================================================================================
3798 * \brief Return a boundary link of the triangle face
3799 * \param links - set of all links
3800 * \param avoidLink - link not to return
3801 * \param notBoundaryLink - out, neither the returned link nor avoidLink
3802 * \param nodeToContain - node the returned link must contain; if provided, search
3803 * also performed on adjacent faces
3804 * \param isAdjacentUsed - returns true if link is found in adjacent faces
3805 * \param nbRecursionsLeft - to limit recursion
3807 //================================================================================
3809 TLinkInSet QFace::GetBoundaryLink( const TLinkSet& links,
3810 const TChainLink& avoidLink,
3811 TLinkInSet * notBoundaryLink,
3812 const SMDS_MeshNode* nodeToContain,
3813 bool * isAdjacentUsed,
3814 int nbRecursionsLeft) const
3816 TLinkInSet linksEnd = links.end(), boundaryLink = linksEnd;
3818 typedef list< pair< const QFace*, TLinkInSet > > TFaceLinkList;
3819 TFaceLinkList adjacentFaces;
3821 for ( size_t iL = 0; iL < _sides.size(); ++iL )
3823 if ( avoidLink._qlink == _sides[iL] )
3825 TLinkInSet link = links.find( _sides[iL] );
3826 if ( link == linksEnd ) continue;
3827 if ( (*link)->MediumPos() > SMDS_TOP_FACE )
3828 continue; // We work on faces here, don't go inside a solid
3831 if ( link->IsBoundary() ) {
3832 if ( !nodeToContain ||
3833 (*link)->node1() == nodeToContain ||
3834 (*link)->node2() == nodeToContain )
3836 boundaryLink = link;
3837 if ( !notBoundaryLink ) break;
3840 else if ( notBoundaryLink ) {
3841 *notBoundaryLink = link;
3842 if ( boundaryLink != linksEnd ) break;
3845 if ( boundaryLink == linksEnd && nodeToContain ) // collect adjacent faces
3846 if ( const QFace* adj = link->NextFace( this ))
3847 if ( adj->Contains( nodeToContain ))
3848 adjacentFaces.push_back( make_pair( adj, link ));
3851 if ( isAdjacentUsed ) *isAdjacentUsed = false;
3852 if ( boundaryLink == linksEnd && nodeToContain && nbRecursionsLeft) // check adjacent faces
3854 if ( nbRecursionsLeft < 0 )
3855 nbRecursionsLeft = nodeToContain->NbInverseElements();
3856 TFaceLinkList::iterator adj = adjacentFaces.begin();
3857 for ( ; boundaryLink == linksEnd && adj != adjacentFaces.end(); ++adj )
3858 boundaryLink = adj->first->GetBoundaryLink( links, *(adj->second), 0, nodeToContain,
3859 isAdjacentUsed, nbRecursionsLeft-1);
3860 if ( isAdjacentUsed ) *isAdjacentUsed = true;
3862 return boundaryLink;
3864 //================================================================================
3866 * \brief Return a link ending at the given node but not avoidLink
3868 //================================================================================
3870 TLinkInSet QFace::GetLinkByNode( const TLinkSet& links,
3871 const TChainLink& avoidLink,
3872 const SMDS_MeshNode* nodeToContain) const
3874 for ( size_t i = 0; i < _sides.size(); ++i )
3875 if ( avoidLink._qlink != _sides[i] &&
3876 (_sides[i]->node1() == nodeToContain || _sides[i]->node2() == nodeToContain ))
3877 return links.find( _sides[i] );
3881 //================================================================================
3883 * \brief Return normal to the i-th side pointing outside the face
3885 //================================================================================
3887 gp_Vec QFace::LinkNorm(const int i, SMESH_MesherHelper* /*uvHelper*/) const
3889 gp_Vec norm = _normal ^ gp_Vec( XYZ(_sides[i]->node1()), XYZ(_sides[i]->node2()));
3890 gp_XYZ pIn = ( _sides[ (i+1)%3 ]->MiddlePnt() +
3891 _sides[ (i+2)%3 ]->MiddlePnt() ) / 2.;
3892 gp_Vec vecOut = ( _sides[i]->MiddlePnt() - pIn );
3894 if ( norm * vecOut < 0 )
3896 double mag2 = norm.SquareMagnitude();
3897 if ( mag2 > numeric_limits<double>::min() )
3898 norm /= sqrt( mag2 );
3901 //================================================================================
3903 * \brief Move medium node of theLink according to its distance from boundary
3904 * \param theLink - link to fix
3905 * \param theRefVec - movement of boundary
3906 * \param theLinks - all adjacent links of continous triangles
3907 * \param theFaceHelper - helper is not used so far
3908 * \param thePrevLen - distance from the boundary
3909 * \param theStep - number of steps till movement propagation limit
3910 * \param theLinkNorm - out normal to theLink
3911 * \param theSign - 1 or -1 depending on movement of boundary
3912 * \retval double - distance from boundary to propagation limit or other boundary
3914 //================================================================================
3916 double QFace::MoveByBoundary( const TChainLink& theLink,
3917 const gp_Vec& theRefVec,
3918 const TLinkSet& theLinks,
3919 SMESH_MesherHelper* theFaceHelper,
3920 const double thePrevLen,
3922 gp_Vec* theLinkNorm,
3923 double theSign) const
3926 return thePrevLen; // propagation limit reached
3928 size_t iL; // index of theLink
3929 for ( iL = 0; iL < _sides.size(); ++iL )
3930 if ( theLink._qlink == _sides[ iL ])
3933 MSG(string(theStep,'.')<<" Ref( "<<theRefVec.X()<<","<<theRefVec.Y()<<","<<theRefVec.Z()<<" )"
3934 <<" thePrevLen " << thePrevLen);
3935 MSG(string(theStep,'.')<<" "<<*theLink._qlink);
3937 gp_Vec linkNorm = -LinkNorm( iL/*, theFaceHelper*/ ); // normal to theLink
3938 double refProj = theRefVec * linkNorm; // project movement vector to normal of theLink
3939 if ( theStep == theFirstStep )
3940 theSign = refProj < 0. ? -1. : 1.;
3941 else if ( theSign * refProj < 0.4 * theRefVec.Magnitude())
3942 return thePrevLen; // to propagate movement forward only, not in side dir or backward
3944 int iL1 = (iL + 1) % 3, iL2 = (iL + 2) % 3; // indices of the two other links of triangle
3945 TLinkInSet link1 = theLinks.find( _sides[iL1] );
3946 TLinkInSet link2 = theLinks.find( _sides[iL2] );
3948 const QFace *f1 = 0, *f2 = 0; // adjacent faces
3949 bool isBndLink1 = true, isBndLink2 = true;
3950 if ( link1 != theLinks.end() && link2 != theLinks.end() )
3952 f1 = link1->NextFace( this );
3953 f2 = link2->NextFace( this );
3955 isBndLink1 = ( theLink->MediumPos() > (*link1)->MediumPos() );
3956 isBndLink2 = ( theLink->MediumPos() > (*link2)->MediumPos() );
3957 if ( theStep == theFirstStep ) // (issue 22541) quad-dominant mesh
3959 if ( !isBndLink1 && !f1 )
3960 f1 = (*link1)->GetContinuesFace( this ); // get a quadrangle face
3961 if ( !isBndLink2 && !f2 )
3962 f2 = (*link2)->GetContinuesFace( this );
3965 else if ( _sides.size() < 4 )
3968 // propagate to adjacent faces till limit step or boundary
3969 double len1 = thePrevLen + (theLink->MiddlePnt() - _sides[iL1]->MiddlePnt()).Modulus();
3970 double len2 = thePrevLen + (theLink->MiddlePnt() - _sides[iL2]->MiddlePnt()).Modulus();
3971 gp_Vec linkDir1(0,0,0); // initialize to avoid valgrind error ("Conditional jump...")
3972 gp_Vec linkDir2(0,0,0);
3975 if ( f1 && !isBndLink1 )
3976 len1 = f1->MoveByBoundary
3977 ( *link1, theRefVec, theLinks, theFaceHelper, len1, theStep-1, &linkDir1, theSign);
3979 linkDir1 = LinkNorm( iL1/*, theFaceHelper*/ );
3981 MSG( " --------------- EXCEPTION");
3986 if ( f2 && !isBndLink2 )
3987 len2 = f2->MoveByBoundary
3988 ( *link2, theRefVec, theLinks, theFaceHelper, len2, theStep-1, &linkDir2, theSign);
3990 linkDir2 = LinkNorm( iL2/*, theFaceHelper*/ );
3992 MSG( " --------------- EXCEPTION");
3997 if ( theStep != theFirstStep )
3999 // choose chain length by direction of propagation most codirected with theRefVec
4000 bool choose1 = ( theRefVec * linkDir1 * theSign > theRefVec * linkDir2 * theSign );
4001 fullLen = choose1 ? len1 : len2;
4002 double r = thePrevLen / fullLen;
4004 gp_Vec move = linkNorm * refProj * ( 1 - r );
4005 theLink->Move( move, /*sum=*/true );
4007 MSG(string(theStep,'.')<<" Move "<< theLink->_mediumNode->GetID()<<
4008 " by " << refProj * ( 1 - r ) << " following " <<
4009 (choose1 ? *link1->_qlink : *link2->_qlink)); // warning: link1 can be invalid
4011 if ( theLinkNorm ) *theLinkNorm = linkNorm;
4016 //================================================================================
4018 * \brief Checks if the face is distorted due to bentLink
4020 //================================================================================
4022 bool QFace::IsSpoiled(const QLink* bentLink ) const
4024 // code is valid for convex faces only
4026 for ( TIDSortedNodeSet::const_iterator n = begin(); n!=end(); ++n)
4027 gc += XYZ( *n ) / size();
4028 for (unsigned i = 0; i < _sides.size(); ++i )
4030 if ( _sides[i] == bentLink ) continue;
4031 gp_Vec linkNorm = _normal ^ gp_Vec( XYZ(_sides[i]->node1()), XYZ(_sides[i]->node2()));
4032 gp_Vec vecOut( gc, _sides[i]->MiddlePnt() );
4033 if ( linkNorm * vecOut < 0 )
4035 double mag2 = linkNorm.SquareMagnitude();
4036 if ( mag2 > numeric_limits<double>::min() )
4037 linkNorm /= sqrt( mag2 );
4038 gp_Vec vecBent ( _sides[i]->MiddlePnt(), bentLink->MediumPnt());
4039 gp_Vec vecStraight( _sides[i]->MiddlePnt(), bentLink->MiddlePnt());
4040 if ( vecBent * linkNorm > -0.1*vecStraight.Magnitude() )
4047 //================================================================================
4049 * \brief Find pairs of continues faces
4051 //================================================================================
4053 void QLink::SetContinuesFaces() const
4055 // x0 x - QLink, [-|] - QFace, v - volume
4057 // | Between _faces of link x2 two vertical faces are continues
4058 // x1----x2-----x3 and two horizontal faces are continues. We set vertical faces
4059 // | to _faces[0] and _faces[1] and horizontal faces to
4060 // v2 | v3 _faces[2] and _faces[3] (or vise versa).
4063 if ( _faces.empty() )
4065 int iFaceCont = -1, nbBoundary = 0, iBoundary[2]={-1,-1};
4066 if ( _faces[0]->IsBoundary() )
4067 iBoundary[ nbBoundary++ ] = 0;
4068 for ( size_t iF = 1; iFaceCont < 0 && iF < _faces.size(); ++iF )
4070 // look for a face bounding none of volumes bound by _faces[0]
4071 bool sameVol = false;
4072 int nbVol = _faces[iF]->NbVolumes();
4073 for ( int iV = 0; !sameVol && iV < nbVol; ++iV )
4074 sameVol = ( _faces[iF]->_volumes[iV] == _faces[0]->_volumes[0] ||
4075 _faces[iF]->_volumes[iV] == _faces[0]->_volumes[1]);
4078 if ( _faces[iF]->IsBoundary() )
4079 iBoundary[ nbBoundary++ ] = iF;
4081 // Set continues faces: arrange _faces to have
4082 // _faces[0] continues to _faces[1]
4083 // _faces[2] continues to _faces[3]
4084 if ( nbBoundary == 2 ) // bnd faces are continues
4086 if (( iBoundary[0] < 2 ) != ( iBoundary[1] < 2 ))
4088 int iNear0 = iBoundary[0] < 2 ? 1-iBoundary[0] : 5-iBoundary[0];
4089 std::swap( _faces[ iBoundary[1] ], _faces[iNear0] );
4092 else if ( iFaceCont > 0 ) // continues faces found
4094 if ( iFaceCont != 1 )
4095 std::swap( _faces[1], _faces[iFaceCont] );
4097 else if ( _faces.size() > 1 ) // not found, set NULL by the first face
4099 _faces.insert( ++_faces.begin(), (QFace*) 0 );
4102 //================================================================================
4104 * \brief Return a face continues to the given one
4106 //================================================================================
4108 const QFace* QLink::GetContinuesFace( const QFace* face ) const
4110 if ( _faces.size() <= 4 )
4111 for ( size_t i = 0; i < _faces.size(); ++i ) {
4112 if ( _faces[i] == face ) {
4113 int iF = i < 2 ? 1-i : 5-i;
4114 return iF < (int)_faces.size() ? _faces[iF] : 0;
4119 //================================================================================
4121 * \brief True if link is on mesh boundary
4123 //================================================================================
4125 bool QLink::OnBoundary() const
4127 for ( size_t i = 0; i < _faces.size(); ++i )
4128 if (_faces[i] && _faces[i]->IsBoundary()) return true;
4131 //================================================================================
4133 * \brief Return normal of link of the chain
4135 //================================================================================
4137 gp_Vec TChainLink::Normal() const {
4139 if (_qfaces[0]) norm = _qfaces[0]->_normal;
4140 if (_qfaces[1]) norm += _qfaces[1]->_normal;
4143 //================================================================================
4145 * \brief Test link curvature taking into account size of faces
4147 //================================================================================
4149 bool TChainLink::IsStraight() const
4151 bool isStraight = _qlink->IsStraight();
4152 if ( isStraight && _qfaces[0] && !_qfaces[1] )
4154 int i = _qfaces[0]->LinkIndex( _qlink );
4155 int iOpp = ( i + 2 ) % _qfaces[0]->_sides.size();
4156 gp_XYZ mid1 = _qlink->MiddlePnt();
4157 gp_XYZ mid2 = _qfaces[0]->_sides[ iOpp ]->MiddlePnt();
4158 double faceSize2 = (mid1-mid2).SquareModulus();
4159 isStraight = _qlink->_nodeMove.SquareMagnitude() < 1/10./10. * faceSize2;
4164 //================================================================================
4166 * \brief Move medium nodes of vertical links of pentahedrons adjacent by side faces
4168 //================================================================================
4170 void fixPrism( TChain& allLinks )
4172 // separate boundary links from internal ones
4173 typedef set<const QLink*/*, QLink::PtrComparator*/> QLinkSet;
4174 QLinkSet interLinks, bndLinks1, bndLink2;
4176 bool isCurved = false;
4177 for ( TChain::iterator lnk = allLinks.begin(); lnk != allLinks.end(); ++lnk ) {
4178 if ( (*lnk)->OnBoundary() )
4179 bndLinks1.insert( lnk->_qlink );
4181 interLinks.insert( lnk->_qlink );
4182 isCurved = isCurved || !lnk->IsStraight();
4185 return; // no need to move
4187 QLinkSet *curBndLinks = &bndLinks1, *newBndLinks = &bndLink2;
4189 while ( !interLinks.empty() && !curBndLinks->empty() )
4191 // propagate movement from boundary links to connected internal links
4192 QLinkSet::iterator bnd = curBndLinks->begin(), bndEnd = curBndLinks->end();
4193 for ( ; bnd != bndEnd; ++bnd )
4195 const QLink* bndLink = *bnd;
4196 for ( size_t i = 0; i < bndLink->_faces.size(); ++i ) // loop on faces of bndLink
4198 const QFace* face = bndLink->_faces[i]; // quadrange lateral face of a prism
4199 if ( !face ) continue;
4200 // find and move internal link opposite to bndLink within the face
4201 int interInd = ( face->LinkIndex( bndLink ) + 2 ) % face->_sides.size();
4202 const QLink* interLink = face->_sides[ interInd ];
4203 QLinkSet::iterator pInterLink = interLinks.find( interLink );
4204 if ( pInterLink == interLinks.end() ) continue; // not internal link
4205 interLink->Move( bndLink->_nodeMove );
4206 // treated internal links become new boundary ones
4207 interLinks.erase( pInterLink );
4208 newBndLinks->insert( interLink );
4211 curBndLinks->clear();
4212 std::swap( curBndLinks, newBndLinks );
4216 //================================================================================
4218 * \brief Fix links of continues triangles near curved boundary
4220 //================================================================================
4222 void fixTriaNearBoundary( TChain & allLinks, SMESH_MesherHelper& /*helper*/)
4224 if ( allLinks.empty() ) return;
4226 TLinkSet linkSet( allLinks.begin(), allLinks.end());
4227 TLinkInSet linkIt = linkSet.begin(), linksEnd = linkSet.end();
4229 for ( linkIt = linkSet.begin(); linkIt != linksEnd; ++linkIt)
4231 if ( linkIt->IsBoundary() && !linkIt->IsStraight() && linkIt->_qfaces[0])
4233 // move iff a boundary link is bent towards inside of a face (issue 0021084)
4234 const QFace* face = linkIt->_qfaces[0];
4235 gp_XYZ pIn = ( face->_sides[0]->MiddlePnt() +
4236 face->_sides[1]->MiddlePnt() +
4237 face->_sides[2]->MiddlePnt() ) / 3.;
4238 gp_XYZ insideDir( pIn - (*linkIt)->MiddlePnt());
4239 bool linkBentInside = ((*linkIt)->_nodeMove.Dot( insideDir ) > 0 );
4240 //if ( face->IsSpoiled( linkIt->_qlink ))
4241 if ( linkBentInside )
4242 face->MoveByBoundary( *linkIt, (*linkIt)->_nodeMove, linkSet );
4247 //================================================================================
4249 * \brief Detect rectangular structure of links and build chains from them
4251 //================================================================================
4253 enum TSplitTriaResult {
4254 _OK, _NO_CORNERS, _FEW_ROWS, _MANY_ROWS, _NO_SIDELINK, _BAD_MIDQUAD, _NOT_RECT,
4255 _NO_MIDQUAD, _NO_UPTRIA, _BAD_SET_SIZE, _BAD_CORNER, _BAD_START, _NO_BOTLINK, _TWISTED_CHAIN };
4257 TSplitTriaResult splitTrianglesIntoChains( TChain & allLinks,
4258 vector< TChain> & resultChains,
4259 SMDS_TypeOfPosition pos )
4261 // put links in the set and evalute number of result chains by number of boundary links
4263 size_t nbBndLinks = 0;
4264 for ( TChain::iterator lnk = allLinks.begin(); lnk != allLinks.end(); ++lnk ) {
4265 linkSet.insert( *lnk );
4266 nbBndLinks += lnk->IsBoundary();
4268 resultChains.clear();
4269 resultChains.reserve( nbBndLinks / 2 );
4271 TLinkInSet linkIt, linksEnd = linkSet.end();
4273 // find a boundary link with corner node; corner node has position pos-2
4274 // i.e. SMDS_TOP_VERTEX for links on faces and SMDS_TOP_EDGE for
4276 SMDS_TypeOfPosition cornerPos = SMDS_TypeOfPosition(pos-2);
4277 const SMDS_MeshNode* corner = 0;
4278 for ( linkIt = linkSet.begin(); linkIt != linksEnd; ++linkIt )
4279 if ( linkIt->IsBoundary() && (corner = (*linkIt)->EndPosNode(cornerPos)))
4284 TLinkInSet startLink = linkIt;
4285 const SMDS_MeshNode* startCorner = corner;
4286 vector< TChain* > rowChains;
4289 while ( startLink != linksEnd) // loop on columns
4291 // We suppose we have a rectangular structure like shown here. We have found a
4292 // corner of the rectangle (startCorner) and a boundary link sharing
4293 // |/ |/ | the startCorner (startLink). We are going to loop on rows of the
4294 // --o---o---o structure making several chains at once. One chain (columnChain)
4295 // |\ | /| starts at startLink and continues upward (we look at the structure
4296 // \ | \ | / | from such point that startLink is on the bottom of the structure).
4297 // \| \|/ | While going upward we also fill horizontal chains (rowChains) we
4298 // --o---o---o encounter.
4300 // / | \ | \ | startCorner
4305 if ( resultChains.size() == nbBndLinks / 2 )
4307 resultChains.push_back( TChain() );
4308 TChain& columnChain = resultChains.back();
4310 TLinkInSet botLink = startLink; // current horizontal link to go up from
4311 corner = startCorner; // current corner the botLink ends at
4313 while ( botLink != linksEnd ) // loop on rows
4315 // add botLink to the columnChain
4316 columnChain.push_back( *botLink );
4318 const QFace* botTria = botLink->_qfaces[0]; // bottom triangle bound by botLink
4320 { // the column ends
4321 if ( botLink == startLink )
4322 return _TWISTED_CHAIN; // issue 0020951
4323 linkSet.erase( botLink );
4324 if ( iRow != rowChains.size() )
4325 return _FEW_ROWS; // different nb of rows in columns
4328 // find the link dividing the quadrangle (midQuadLink) and vertical boundary
4329 // link ending at <corner> (sideLink); there are two cases:
4330 // 1) midQuadLink does not end at <corner>, then we easily find it by botTria,
4331 // since midQuadLink is not at boundary while sideLink is.
4332 // 2) midQuadLink ends at <corner>
4334 TLinkInSet midQuadLink = linksEnd;
4335 TLinkInSet sideLink = botTria->GetBoundaryLink( linkSet, *botLink, &midQuadLink,
4337 if ( isCase2 ) { // find midQuadLink among links of botTria
4338 midQuadLink = botTria->GetLinkByNode( linkSet, *botLink, corner );
4339 if ( midQuadLink->IsBoundary() )
4340 return _BAD_MIDQUAD;
4342 if ( sideLink == linksEnd || midQuadLink == linksEnd || sideLink == midQuadLink )
4343 return sideLink == linksEnd ? _NO_SIDELINK : _NO_MIDQUAD;
4346 columnChain.push_back( *midQuadLink );
4347 if ( iRow >= rowChains.size() ) {
4349 return _MANY_ROWS; // different nb of rows in columns
4350 if ( resultChains.size() == nbBndLinks / 2 )
4352 resultChains.push_back( TChain() );
4353 rowChains.push_back( & resultChains.back() );
4355 rowChains[iRow]->push_back( *sideLink );
4356 rowChains[iRow]->push_back( *midQuadLink );
4358 const QFace* upTria = midQuadLink->NextFace( botTria ); // upper tria of the rectangle
4362 // prepare startCorner and startLink for the next column
4363 startCorner = startLink->NextNode( startCorner );
4365 startLink = botTria->GetBoundaryLink( linkSet, *botLink, 0, startCorner );
4367 startLink = upTria->GetBoundaryLink( linkSet, *midQuadLink, 0, startCorner );
4368 // check if no more columns remains
4369 if ( startLink != linksEnd ) {
4370 const SMDS_MeshNode* botNode = startLink->NextNode( startCorner );
4371 if ( (isCase2 ? botTria : upTria)->Contains( botNode ))
4372 startLink = linksEnd; // startLink bounds upTria or botTria
4373 else if ( startLink == botLink || startLink == midQuadLink || startLink == sideLink )
4377 // find bottom link and corner for the next row
4378 corner = sideLink->NextNode( corner );
4379 // next bottom link ends at the new corner
4380 linkSet.erase( botLink );
4381 botLink = upTria->GetLinkByNode( linkSet, (isCase2 ? *sideLink : *midQuadLink), corner );
4382 if ( botLink == linksEnd || botLink == midQuadLink || botLink == sideLink)
4384 if ( midQuadLink == startLink || sideLink == startLink )
4385 return _TWISTED_CHAIN; // issue 0020951
4386 linkSet.erase( midQuadLink );
4387 linkSet.erase( sideLink );
4389 // make faces neighboring the found ones be boundary
4390 if ( startLink != linksEnd ) {
4391 const QFace* tria = isCase2 ? botTria : upTria;
4392 for ( int iL = 0; iL < 3; ++iL ) {
4393 linkIt = linkSet.find( tria->_sides[iL] );
4394 if ( linkIt != linksEnd )
4395 linkIt->RemoveFace( tria );
4398 if ( botLink->_qfaces[0] == upTria || botLink->_qfaces[1] == upTria )
4399 botLink->RemoveFace( upTria ); // make next botTria first in vector
4406 // In the linkSet, there must remain the last links of rowChains; add them
4407 if ( linkSet.size() != rowChains.size() )
4408 return _BAD_SET_SIZE;
4409 for ( size_t iRow = 0; iRow < rowChains.size(); ++iRow ) {
4410 // find the link (startLink) ending at startCorner
4412 for ( startLink = linkSet.begin(); startLink != linksEnd; ++startLink ) {
4413 if ( (*startLink)->node1() == startCorner ) {
4414 corner = (*startLink)->node2(); break;
4416 else if ( (*startLink)->node2() == startCorner) {
4417 corner = (*startLink)->node1(); break;
4420 if ( startLink == linksEnd )
4422 rowChains[ iRow ]->push_back( *startLink );
4423 linkSet.erase( startLink );
4424 startCorner = corner;
4430 //================================================================================
4432 * \brief Place medium nodes at the link middle for elements whose corner nodes
4433 * are out of geometrical boundary to prevent distorting elements.
4434 * Issue 0020982, note 0013990
4436 //================================================================================
4438 void force3DOutOfBoundary( SMESH_MesherHelper& theHelper,
4439 SMESH_ComputeErrorPtr& theError)
4441 SMESHDS_Mesh* meshDS = theHelper.GetMeshDS();
4442 TopoDS_Shape shape = theHelper.GetSubShape().Oriented( TopAbs_FORWARD );
4443 if ( shape.IsNull() ) return;
4445 if ( !theError ) theError = SMESH_ComputeError::New();
4449 if ( shape.ShapeType() == TopAbs_FACE ) // 2D
4451 if ( theHelper.GetMesh()->NbTriangles( ORDER_QUADRATIC ) < 1 ) return;
4453 SMESHDS_SubMesh* faceSM = meshDS->MeshElements( shape );
4454 if ( !faceSM ) return;
4456 const TopoDS_Face& face = TopoDS::Face( shape );
4457 Handle(Geom_Surface) surface = BRep_Tool::Surface( face );
4459 TopExp_Explorer edgeIt( face, TopAbs_EDGE );
4460 for ( ; edgeIt.More(); edgeIt.Next() ) // loop on EDGEs of a FACE
4462 // check if the EDGE needs checking
4463 const TopoDS_Edge& edge = TopoDS::Edge( edgeIt.Current() );
4464 if ( SMESH_Algo::isDegenerated( edge ) )
4466 if ( theHelper.IsRealSeam( edge ) &&
4467 edge.Orientation() == TopAbs_REVERSED )
4470 SMESHDS_SubMesh* edgeSM = meshDS->MeshElements( edge );
4471 if ( !edgeSM ) continue;
4474 Handle(Geom2d_Curve) pcurve = BRep_Tool::CurveOnSurface( edge, face, f, l );
4475 BRepAdaptor_Curve curve3D( edge );
4476 switch ( curve3D.GetType() ) {
4477 case GeomAbs_Line: continue;
4478 case GeomAbs_Circle:
4479 case GeomAbs_Ellipse:
4480 case GeomAbs_Hyperbola:
4481 case GeomAbs_Parabola:
4484 gp_Vec D1, D2, Du1, Dv1; gp_Pnt p;
4485 curve3D.D2( 0.5 * ( f + l ), p, D1, D2 );
4486 gp_Pnt2d uv = pcurve->Value( 0.5 * ( f + l ) );
4487 surface->D1( uv.X(), uv.Y(), p, Du1, Dv1 );
4488 gp_Vec fNorm = Du1 ^ Dv1;
4489 if ( fNorm.IsParallel( D2, M_PI * 25./180. ))
4490 continue; // face is normal to the curve3D
4492 gp_Vec curvNorm = fNorm ^ D1;
4493 if ( edge.Orientation() == TopAbs_REVERSED ) curvNorm.Reverse();
4494 if ( curvNorm * D2 > 0 )
4495 continue; // convex edge
4497 catch ( Standard_Failure )
4503 // get nodes shared by faces that may be distorted
4504 SMDS_NodeIteratorPtr nodeIt;
4505 if ( edgeSM->NbNodes() > 0 ) {
4506 nodeIt = edgeSM->GetNodes();
4509 SMESHDS_SubMesh* vertexSM = meshDS->MeshElements( theHelper.IthVertex( 0, edge ));
4511 vertexSM = meshDS->MeshElements( theHelper.IthVertex( 1, edge ));
4512 if ( !vertexSM ) continue;
4513 nodeIt = vertexSM->GetNodes();
4516 // find suspicious faces
4517 TIDSortedElemSet checkedFaces;
4518 vector< const SMDS_MeshNode* > nOnEdge( 2 );
4519 const SMDS_MeshNode* nOnFace;
4520 while ( nodeIt->more() )
4522 const SMDS_MeshNode* n = nodeIt->next();
4523 SMDS_ElemIteratorPtr faceIt = n->GetInverseElementIterator( SMDSAbs_Face );
4524 while ( faceIt->more() )
4526 const SMDS_MeshElement* f = faceIt->next();
4527 if ( !faceSM->Contains( f ) ||
4528 f->NbNodes() < 6 || // check quadratic triangles only
4529 !checkedFaces.insert( f ).second )
4532 // get nodes on EDGE and on FACE of a suspicious face
4533 nOnEdge.clear(); nOnFace = 0;
4534 SMDS_MeshElement::iterator triNode = f->begin_nodes();
4535 for ( int nbN = 0; nbN < 3; ++triNode, ++nbN )
4538 if ( n->GetPosition()->GetDim() == 2 )
4541 nOnEdge.push_back( n );
4544 // check if nOnFace is inside the FACE
4545 if ( nOnFace && nOnEdge.size() == 2 )
4547 theHelper.AddTLinks( static_cast< const SMDS_MeshFace* > ( f ));
4548 if ( !SMESH_MeshAlgos::FaceNormal( f, faceNorm, /*normalized=*/false ))
4550 gp_XYZ edgeDir = SMESH_TNodeXYZ( nOnEdge[0] ) - SMESH_TNodeXYZ( nOnEdge[1] );
4551 gp_XYZ edgeNorm = faceNorm ^ edgeDir;
4552 n = theHelper.GetMediumNode( nOnEdge[0], nOnEdge[1], true ); // find n, not create
4553 gp_XYZ pN0 = SMESH_TNodeXYZ( nOnEdge[0] );
4554 gp_XYZ pMedium = SMESH_TNodeXYZ( n ); // on-edge node location
4555 gp_XYZ pFaceN = SMESH_TNodeXYZ( nOnFace ); // on-face node location
4556 double hMedium = edgeNorm * gp_Vec( pN0, pMedium ).XYZ();
4557 double hFace = edgeNorm * gp_Vec( pN0, pFaceN ).XYZ();
4558 if ( Abs( hMedium ) > Abs( hFace * 0.6 ))
4560 // nOnFace is out of FACE, move a medium on-edge node to the middle
4561 gp_XYZ pMid3D = 0.5 * ( pN0 + SMESH_TNodeXYZ( nOnEdge[1] ));
4562 meshDS->MoveNode( n, pMid3D.X(), pMid3D.Y(), pMid3D.Z() );
4563 MSG( "move OUT of face " << n );
4564 theError->myBadElements.push_back( f );
4570 if ( !theError->myBadElements.empty() )
4571 theError->myName = EDITERR_NO_MEDIUM_ON_GEOM;
4574 } // 2D ==============================================================================
4576 if ( shape.ShapeType() == TopAbs_SOLID ) // 3D
4578 if ( theHelper.GetMesh()->NbTetras ( ORDER_QUADRATIC ) < 1 &&
4579 theHelper.GetMesh()->NbPyramids( ORDER_QUADRATIC ) < 1 ) return;
4581 SMESHDS_SubMesh* solidSM = meshDS->MeshElements( shape );
4582 if ( !solidSM ) return;
4584 // check if the SOLID is bound by concave FACEs
4585 vector< TopoDS_Face > concaveFaces;
4586 TopExp_Explorer faceIt( shape, TopAbs_FACE );
4587 for ( ; faceIt.More(); faceIt.Next() ) // loop on FACEs of a SOLID
4589 const TopoDS_Face& face = TopoDS::Face( faceIt.Current() );
4590 if ( !meshDS->MeshElements( face )) continue;
4592 BRepAdaptor_Surface surface( face );
4593 switch ( surface.GetType() ) {
4594 case GeomAbs_Plane: continue;
4595 case GeomAbs_Cylinder:
4597 case GeomAbs_Sphere:
4600 double u = 0.5 * ( surface.FirstUParameter() + surface.LastUParameter() );
4601 double v = 0.5 * ( surface.FirstVParameter() + surface.LastVParameter() );
4602 gp_Vec Du1, Dv1, Du2, Dv2, Duv2; gp_Pnt p;
4603 surface.D2( u,v, p, Du1, Dv1, Du2, Dv2, Duv2 );
4604 gp_Vec fNorm = Du1 ^ Dv1;
4605 if ( face.Orientation() == TopAbs_REVERSED ) fNorm.Reverse();
4606 bool concaveU = ( fNorm * Du2 > 1e-100 );
4607 bool concaveV = ( fNorm * Dv2 > 1e-100 );
4608 if ( concaveU || concaveV )
4609 concaveFaces.push_back( face );
4611 catch ( Standard_Failure )
4613 concaveFaces.push_back( face );
4618 if ( concaveFaces.empty() )
4621 // fix 2D mesh on the SOLID
4622 for ( faceIt.ReInit(); faceIt.More(); faceIt.Next() ) // loop on FACEs of a SOLID
4624 SMESH_MesherHelper faceHelper( *theHelper.GetMesh() );
4625 faceHelper.SetSubShape( faceIt.Current() );
4626 force3DOutOfBoundary( faceHelper, theError );
4629 // get an iterator over faces on concaveFaces
4630 vector< SMDS_ElemIteratorPtr > faceIterVec( concaveFaces.size() );
4631 for ( size_t i = 0; i < concaveFaces.size(); ++i )
4632 faceIterVec[i] = meshDS->MeshElements( concaveFaces[i] )->GetElements();
4633 typedef SMDS_IteratorOnIterators
4634 < const SMDS_MeshElement*, vector< SMDS_ElemIteratorPtr > > TIterOnIter;
4635 SMDS_ElemIteratorPtr faceIter( new TIterOnIter( faceIterVec ));
4637 // a seacher to check if a volume is close to a concave face
4638 std::auto_ptr< SMESH_ElementSearcher > faceSearcher
4639 ( SMESH_MeshAlgos::GetElementSearcher( *theHelper.GetMeshDS(), faceIter ));
4642 //BRepClass3d_SolidClassifier solidClassifier( shape );
4644 TIDSortedElemSet checkedVols, movedNodes;
4645 //for ( faceIt.ReInit(); faceIt.More(); faceIt.Next() ) // loop on FACEs of a SOLID
4646 for ( size_t iF = 0; iF < concaveFaces.size(); ++iF ) // loop on concave FACEs
4648 //const TopoDS_Shape& face = faceIt.Current();
4649 const TopoDS_Shape& face = concaveFaces[ iF ];
4650 SMESHDS_SubMesh* faceSM = meshDS->MeshElements( face );
4651 if ( !faceSM ) continue;
4653 // get nodes shared by volumes (tet and pyra) on the FACE that may be distorted
4654 SMDS_NodeIteratorPtr nodeIt;
4655 if ( faceSM->NbNodes() > 0 ) {
4656 nodeIt = faceSM->GetNodes();
4659 TopExp_Explorer vertex( face, TopAbs_VERTEX );
4660 SMESHDS_SubMesh* vertexSM = meshDS->MeshElements( vertex.Current() );
4661 if ( !vertexSM ) continue;
4662 nodeIt = vertexSM->GetNodes();
4664 // get ids of sub-shapes of the FACE
4666 SMESH_subMeshIteratorPtr smIt =
4667 theHelper.GetMesh()->GetSubMesh( face )->getDependsOnIterator(/*includeSelf=*/true);
4668 while ( smIt->more() )
4669 subIDs.insert( smIt->next()->GetId() );
4671 // find suspicious volumes adjacent to the FACE
4672 vector< const SMDS_MeshNode* > nOnFace( 4 );
4673 const SMDS_MeshNode* nInSolid;
4674 while ( nodeIt->more() )
4676 const SMDS_MeshNode* n = nodeIt->next();
4677 SMDS_ElemIteratorPtr volIt = n->GetInverseElementIterator( SMDSAbs_Volume );
4678 while ( volIt->more() )
4680 const SMDS_MeshElement* vol = volIt->next();
4681 size_t nbN = vol->NbCornerNodes();
4682 if ( ( nbN != 4 && nbN != 5 ) ||
4683 !solidSM->Contains( vol ) ||
4684 !checkedVols.insert( vol ).second )
4687 // get nodes on FACE and in SOLID of a suspicious volume
4688 nOnFace.clear(); nInSolid = 0;
4689 SMDS_MeshElement::iterator volNode = vol->begin_nodes();
4690 for ( int nb = nbN; nb > 0; ++volNode, --nb )
4693 if ( n->GetPosition()->GetDim() == 3 )
4695 else if ( subIDs.count( n->getshapeId() ))
4696 nOnFace.push_back( n );
4700 if ( !nInSolid || nOnFace.size() != nbN - 1 )
4703 // get size of the vol
4704 SMESH_TNodeXYZ pInSolid( nInSolid ), pOnFace0( nOnFace[0] );
4705 double volLength = pInSolid.SquareDistance( nOnFace[0] );
4706 for ( size_t i = 1; i < nOnFace.size(); ++i )
4708 volLength = Max( volLength, pOnFace0.SquareDistance( nOnFace[i] ));
4711 // check if vol is close to concaveFaces
4712 const SMDS_MeshElement* closeFace =
4713 faceSearcher->FindClosestTo( pInSolid, SMDSAbs_Face );
4715 pInSolid.SquareDistance( closeFace->GetNode(0) ) > 4 * volLength )
4718 // check if vol is distorted, i.e. a medium node is much closer
4719 // to nInSolid than the link middle
4720 bool isDistorted = false;
4721 SMDS_FaceOfNodes onFaceTria( nOnFace[0], nOnFace[1], nOnFace[2] );
4722 if ( !SMESH_MeshAlgos::FaceNormal( &onFaceTria, faceNorm, /*normalized=*/false ))
4724 theHelper.AddTLinks( static_cast< const SMDS_MeshVolume* > ( vol ));
4725 vector< pair< SMESH_TLink, const SMDS_MeshNode* > > links;
4726 for ( size_t i = 0; i < nOnFace.size(); ++i ) // loop on links between nOnFace
4727 for ( size_t j = i+1; j < nOnFace.size(); ++j )
4729 SMESH_TLink link( nOnFace[i], nOnFace[j] );
4730 TLinkNodeMap::const_iterator linkIt =
4731 theHelper.GetTLinkNodeMap().find( link );
4732 if ( linkIt != theHelper.GetTLinkNodeMap().end() )
4734 links.push_back( make_pair( linkIt->first, linkIt->second ));
4735 if ( !isDistorted ) {
4736 // compare projections of nInSolid and nMedium to face normal
4737 gp_Pnt pMedium = SMESH_TNodeXYZ( linkIt->second );
4738 double hMedium = faceNorm * gp_Vec( pOnFace0, pMedium ).XYZ();
4739 double hVol = faceNorm * gp_Vec( pOnFace0, pInSolid ).XYZ();
4740 isDistorted = ( Abs( hMedium ) > Abs( hVol * 0.5 ));
4744 // move medium nodes to link middle
4747 for ( size_t i = 0; i < links.size(); ++i )
4749 const SMDS_MeshNode* nMedium = links[i].second;
4750 if ( movedNodes.insert( nMedium ).second )
4752 gp_Pnt pMid3D = 0.5 * ( SMESH_TNodeXYZ( links[i].first.node1() ) +
4753 SMESH_TNodeXYZ( links[i].first.node2() ));
4754 meshDS->MoveNode( nMedium, pMid3D.X(), pMid3D.Y(), pMid3D.Z() );
4755 MSG( "move OUT of solid " << nMedium );
4758 theError->myBadElements.push_back( vol );
4760 } // loop on volumes sharing a node on FACE
4761 } // loop on nodes on FACE
4762 } // loop on FACEs of a SOLID
4764 if ( !theError->myBadElements.empty() )
4765 theError->myName = EDITERR_NO_MEDIUM_ON_GEOM;
4771 //=======================================================================
4773 * \brief Move medium nodes of faces and volumes to fix distorted elements
4774 * \param error - container of fixed distorted elements
4775 * \param volumeOnly - to fix nodes on faces or not, if the shape is solid
4777 * Issue 0020307: EDF 992 SMESH : Linea/Quadratic with Medium Node on Geometry
4779 //=======================================================================
4781 void SMESH_MesherHelper::FixQuadraticElements(SMESH_ComputeErrorPtr& compError,
4784 // setenv NO_FixQuadraticElements to know if FixQuadraticElements() is guilty of bad conversion
4785 if ( getenv("NO_FixQuadraticElements") )
4788 // 0. Apply algorithm to SOLIDs or FACEs
4789 // ----------------------------------------------
4790 if ( myShape.IsNull() ) {
4791 if ( !myMesh->HasShapeToMesh() ) return;
4792 SetSubShape( myMesh->GetShapeToMesh() );
4796 TopTools_IndexedMapOfShape solids;
4797 TopExp::MapShapes(myShape,TopAbs_SOLID,solids);
4798 nbSolids = solids.Extent();
4800 TopTools_MapOfShape faces; // faces not in solid or in not meshed solid
4801 for ( TopExp_Explorer f(myShape,TopAbs_FACE,TopAbs_SOLID); f.More(); f.Next() ) {
4802 faces.Add( f.Current() ); // not in solid
4804 for ( TopExp_Explorer s(myShape,TopAbs_SOLID); s.More(); s.Next() ) {
4805 if ( myMesh->GetSubMesh( s.Current() )->IsEmpty() ) { // get faces of solid
4806 for ( TopExp_Explorer f( s.Current(), TopAbs_FACE); f.More(); f.Next() )
4807 faces.Add( f.Current() ); // in not meshed solid
4809 else { // fix nodes in the solid and its faces
4811 MSG("FIX SOLID " << nbSolids-- << " #" << GetMeshDS()->ShapeToIndex(s.Current()));
4813 SMESH_MesherHelper h(*myMesh);
4814 h.SetSubShape( s.Current() );
4815 h.ToFixNodeParameters(true);
4816 h.FixQuadraticElements( compError, false );
4819 // fix nodes on geom faces
4821 int nbfaces = nbSolids;
4822 nbfaces = faces.Extent(); /*avoid "unused varianbles": */ nbfaces++, nbfaces--;
4824 for ( TopTools_MapIteratorOfMapOfShape fIt( faces ); fIt.More(); fIt.Next() ) {
4825 MSG("FIX FACE " << nbfaces-- << " #" << GetMeshDS()->ShapeToIndex(fIt.Key()));
4826 SMESH_MesherHelper h(*myMesh);
4827 h.SetSubShape( fIt.Key() );
4828 h.ToFixNodeParameters(true);
4829 h.FixQuadraticElements( compError, true);
4831 //perf_print_all_meters(1);
4832 if ( compError && compError->myName == EDITERR_NO_MEDIUM_ON_GEOM )
4833 compError->myComment = "during conversion to quadratic, "
4834 "some medium nodes were not placed on geometry to avoid distorting elements";
4838 // 1. Find out type of elements and get iterator on them
4839 // ---------------------------------------------------
4841 SMDS_ElemIteratorPtr elemIt;
4842 SMDSAbs_ElementType elemType = SMDSAbs_All;
4844 SMESH_subMesh* submesh = myMesh->GetSubMeshContaining( myShapeID );
4847 if ( SMESHDS_SubMesh* smDS = submesh->GetSubMeshDS() ) {
4848 elemIt = smDS->GetElements();
4849 if ( elemIt->more() ) {
4850 elemType = elemIt->next()->GetType();
4851 elemIt = smDS->GetElements();
4854 if ( !elemIt || !elemIt->more() || elemType < SMDSAbs_Face )
4857 // 2. Fill in auxiliary data structures
4858 // ----------------------------------
4862 set< QLink >::iterator pLink;
4863 set< QFace >::iterator pFace;
4865 bool isCurved = false;
4866 //bool hasRectFaces = false;
4867 //set<int> nbElemNodeSet;
4868 SMDS_VolumeTool volTool;
4870 TIDSortedNodeSet apexOfPyramid;
4871 const int apexIndex = 4;
4874 // Move medium nodes to the link middle for elements whose corner nodes
4875 // are out of geometrical boundary to fix distorted elements.
4876 force3DOutOfBoundary( *this, compError );
4878 if ( elemType == SMDSAbs_Volume )
4880 while ( elemIt->more() ) // loop on volumes
4882 const SMDS_MeshElement* vol = elemIt->next();
4883 if ( !vol->IsQuadratic() || !volTool.Set( vol ))
4885 double volMinSize2 = -1.;
4886 for ( int iF = 0; iF < volTool.NbFaces(); ++iF ) // loop on faces of volume
4888 int nbN = volTool.NbFaceNodes( iF );
4889 //nbElemNodeSet.insert( nbN );
4890 const SMDS_MeshNode** faceNodes = volTool.GetFaceNodes( iF );
4891 vector< const QLink* > faceLinks( nbN/2 );
4892 for ( int iN = 0; iN < nbN; iN += 2 ) // loop on links of a face
4895 QLink link( faceNodes[iN], faceNodes[iN+2], faceNodes[iN+1] );
4896 pLink = links.insert( link ).first;
4897 faceLinks[ iN/2 ] = & *pLink;
4899 if ( link.MediumPos() == SMDS_TOP_3DSPACE )
4901 if ( !link.IsStraight() )
4902 return; // already fixed
4904 else if ( !isCurved )
4906 if ( volMinSize2 < 0 ) volMinSize2 = volTool.MinLinearSize2();
4907 isCurved = !isStraightLink( volMinSize2, link._nodeMove.SquareMagnitude() );
4911 pFace = faces.insert( QFace( faceLinks )).first;
4912 if ( pFace->NbVolumes() == 0 )
4913 pFace->AddSelfToLinks();
4914 pFace->SetVolume( vol );
4915 // hasRectFaces = hasRectFaces ||
4916 // ( volTool.GetVolumeType() == SMDS_VolumeTool::QUAD_HEXA ||
4917 // volTool.GetVolumeType() == SMDS_VolumeTool::QUAD_PENTA );
4920 pFace->_face = GetMeshDS()->FindFace(faceNodes[0],faceNodes[2],faceNodes[4]);
4922 pFace->_face = GetMeshDS()->FindFace(faceNodes[0],faceNodes[2],
4923 faceNodes[4],faceNodes[6] );
4926 // collect pyramid apexes for further correction
4927 if ( vol->NbCornerNodes() == 5 )
4928 apexOfPyramid.insert( vol->GetNode( apexIndex ));
4930 set< QLink >::iterator pLink = links.begin();
4931 for ( ; pLink != links.end(); ++pLink )
4932 pLink->SetContinuesFaces();
4936 while ( elemIt->more() ) // loop on faces
4938 const SMDS_MeshElement* face = elemIt->next();
4939 if ( !face->IsQuadratic() )
4941 //nbElemNodeSet.insert( face->NbNodes() );
4942 int nbN = face->NbNodes()/2;
4943 vector< const QLink* > faceLinks( nbN );
4944 for ( int iN = 0; iN < nbN; ++iN ) // loop on links of a face
4947 QLink link( face->GetNode(iN), face->GetNode((iN+1)%nbN), face->GetNode(iN+nbN) );
4948 pLink = links.insert( link ).first;
4949 faceLinks[ iN ] = & *pLink;
4951 link.node1()->GetPosition()->GetTypeOfPosition() < 2 &&
4952 link.node2()->GetPosition()->GetTypeOfPosition() < 2 )
4953 isCurved = !link.IsStraight();
4956 pFace = faces.insert( QFace( faceLinks )).first;
4957 pFace->AddSelfToLinks();
4958 //hasRectFaces = ( hasRectFaces || nbN == 4 );
4962 return; // no curved edges of faces
4964 // 3. Compute displacement of medium nodes
4965 // ---------------------------------------
4967 SMESH_MesherHelper faceHlp(*myMesh);
4969 // two loops on QFaces: the first is to treat boundary links, the second is for internal ones.
4970 TopLoc_Location loc;
4972 // not to treat boundary of volumic sub-mesh.
4973 int isInside = ( elemType == SMDSAbs_Volume && volumeOnly ) ? 1 : 0;
4974 for ( ; isInside < 2; ++isInside )
4976 MSG( "--------------- LOOP (inside=" << isInside << ") ------------------");
4977 SMDS_TypeOfPosition pos = isInside ? SMDS_TOP_3DSPACE : SMDS_TOP_FACE;
4978 SMDS_TypeOfPosition bndPos = isInside ? SMDS_TOP_FACE : SMDS_TOP_EDGE;
4980 for ( pFace = faces.begin(); pFace != faces.end(); ++pFace ) {
4981 if ( bool(isInside) == pFace->IsBoundary() )
4983 for ( int dir = 0; dir < 2; ++dir ) // 2 directions of propagation from the quadrangle
4986 // make chain of links connected via continues faces
4989 if ( !pFace->GetLinkChain( dir, rawChain, pos, error) && error ==ERR_UNKNOWN ) continue;
4991 if ( !pFace->GetLinkChain( dir+2, rawChain, pos, error ) && error ==ERR_UNKNOWN ) continue;
4993 vector< TChain > chains;
4994 if ( error == ERR_OK ) { // chain contains continues rectangles
4996 chains[0].splice( chains[0].begin(), rawChain );
4998 else if ( error == ERR_TRI ) { // chain contains continues triangles
4999 TSplitTriaResult res = splitTrianglesIntoChains( rawChain, chains, pos );
5000 if ( res != _OK ) { // not 'quadrangles split into triangles' in chain
5001 fixTriaNearBoundary( rawChain, *this );
5005 else if ( error == ERR_PRISM ) { // quadrangle side faces of prisms
5006 fixPrism( rawChain );
5012 for ( size_t iC = 0; iC < chains.size(); ++iC )
5014 TChain& chain = chains[iC];
5015 if ( chain.empty() ) continue;
5016 if ( chain.front().IsStraight() && chain.back().IsStraight() ) {
5017 MSG("3D straight - ignore");
5020 if ( chain.front()->MediumPos() > bndPos ||
5021 chain.back() ->MediumPos() > bndPos ) {
5022 MSG("Internal chain - ignore");
5025 // mesure chain length and compute link position along the chain
5026 double chainLen = 0;
5027 vector< double > linkPos;
5028 TChain savedChain; // backup
5029 MSGBEG( "Link medium nodes: ");
5030 TChain::iterator link0 = chain.begin(), link1 = chain.begin(), link2;
5031 for ( ++link1; link1 != chain.end(); ++link1, ++link0 ) {
5032 MSGBEG( (*link0)->_mediumNode->GetID() << "-" <<(*link1)->_mediumNode->GetID()<<" ");
5033 double len = ((*link0)->MiddlePnt() - (*link1)->MiddlePnt()).Modulus();
5034 while ( len < numeric_limits<double>::min() ) { // remove degenerated link
5035 if ( savedChain.empty() ) savedChain = chain;
5036 link1 = chain.erase( link1 );
5037 if ( link1 == chain.end() )
5039 len = ((*link0)->MiddlePnt() - (*link1)->MiddlePnt()).Modulus();
5042 linkPos.push_back( chainLen );
5045 if ( linkPos.size() <= 2 && savedChain.size() > 2 ) {
5050 for ( link1 = chain.begin(); link1 != chain.end(); ++link1 ) {
5052 linkPos.push_back( chainLen );
5055 gp_Vec move0 = chain.front()->_nodeMove;
5056 gp_Vec move1 = chain.back ()->_nodeMove;
5061 // compute node displacement of end links of chain in parametric space of FACE
5062 TChainLink& linkOnFace = *(++chain.begin());
5063 const SMDS_MeshNode* nodeOnFace = linkOnFace->_mediumNode;
5064 TopoDS_Shape f = GetSubShapeByNode( nodeOnFace, GetMeshDS() );
5065 if ( !f.IsNull() && f.ShapeType() == TopAbs_FACE )
5067 face = TopoDS::Face( f );
5068 faceHlp.SetSubShape( face );
5069 Handle(Geom_Surface) surf = BRep_Tool::Surface(face,loc);
5070 //bool isStraight[2]; // commented for issue 0023118
5071 for ( int is1 = 0; is1 < 2; ++is1 ) // move0 or move1
5073 TChainLink& link = is1 ? chain.back() : chain.front();
5074 gp_XY uvm = faceHlp.GetNodeUV( face, link->_mediumNode, nodeOnFace, &checkUV );
5075 gp_XY uv1 = faceHlp.GetNodeUV( face, link->node1(), nodeOnFace, &checkUV );
5076 gp_XY uv2 = faceHlp.GetNodeUV( face, link->node2(), nodeOnFace, &checkUV );
5077 gp_XY uv12 = faceHlp.GetMiddleUV( surf, uv1, uv2 );
5078 // uvMove = uvm - uv12
5079 gp_XY uvMove = ApplyIn2D(surf, uvm, uv12, gp_XY_Subtracted, /*inPeriod=*/false);
5080 ( is1 ? move1 : move0 ).SetCoord( uvMove.X(), uvMove.Y(), 0 );
5081 if ( !is1 ) // correct nodeOnFace for move1 (issue 0020919)
5082 nodeOnFace = (*(++chain.rbegin()))->_mediumNode;
5083 // isStraight[is1] = isStraightLink( (uv2-uv1).SquareModulus(),
5084 // 10 * uvMove.SquareModulus());
5086 // if ( isStraight[0] && isStraight[1] ) {
5087 // MSG("2D straight - ignore");
5088 // continue; // straight - no need to move nodes of internal links
5091 // check if a chain is already fixed
5092 gp_XY uvm = faceHlp.GetNodeUV( face, linkOnFace->_mediumNode, 0, &checkUV );
5093 gp_XY uv1 = faceHlp.GetNodeUV( face, linkOnFace->node1(), nodeOnFace, &checkUV );
5094 gp_XY uv2 = faceHlp.GetNodeUV( face, linkOnFace->node2(), nodeOnFace, &checkUV );
5095 gp_XY uv12 = faceHlp.GetMiddleUV( surf, uv1, uv2 );
5096 if (( uvm - uv12 ).SquareModulus() > 1e-10 )
5098 MSG("Already fixed - ignore");
5104 if ( isInside || face.IsNull() )
5106 // compute node displacement of end links in their local coord systems
5108 TChainLink& ln0 = chain.front(), ln1 = *(++chain.begin());
5109 trsf.SetTransformation( gp_Ax3( gp::Origin(), ln0.Normal(),
5110 gp_Vec( ln0->MiddlePnt(), ln1->MiddlePnt() )));
5111 move0.Transform(trsf);
5114 TChainLink& ln0 = *(++chain.rbegin()), ln1 = chain.back();
5115 trsf.SetTransformation( gp_Ax3( gp::Origin(), ln1.Normal(),
5116 gp_Vec( ln0->MiddlePnt(), ln1->MiddlePnt() )));
5117 move1.Transform(trsf);
5120 // compute displacement of medium nodes
5121 link2 = chain.begin();
5124 for ( int i = 0; link2 != chain.end(); ++link0, ++link1, ++link2, ++i )
5126 double r = linkPos[i] / chainLen;
5127 // displacement in local coord system
5128 gp_Vec move = (1. - r) * move0 + r * move1;
5129 if ( isInside || face.IsNull()) {
5130 // transform to global
5131 gp_Vec x01( (*link0)->MiddlePnt(), (*link1)->MiddlePnt() );
5132 gp_Vec x12( (*link1)->MiddlePnt(), (*link2)->MiddlePnt() );
5134 gp_Vec x = x01.Normalized() + x12.Normalized();
5135 trsf.SetTransformation( gp_Ax3( gp::Origin(), link1->Normal(), x), gp_Ax3() );
5136 } catch ( Standard_Failure ) {
5139 move.Transform(trsf);
5140 (*link1)->Move( move, /*sum=*/false, /*is2dFixed=*/false );
5143 // compute 3D displacement by 2D one
5144 Handle(Geom_Surface) s = BRep_Tool::Surface(face,loc);
5145 gp_XY oldUV = faceHlp.GetNodeUV( face, (*link1)->_mediumNode, 0, &checkUV );
5146 gp_XY newUV = ApplyIn2D( s, oldUV, gp_XY( move.X(),move.Y()), gp_XY_Added );
5147 gp_Pnt newPnt = s->Value( newUV.X(), newUV.Y());
5148 move = gp_Vec( XYZ((*link1)->_mediumNode), newPnt.Transformed(loc) );
5149 if ( SMDS_FacePosition* nPos =
5150 dynamic_cast< SMDS_FacePosition* >((*link1)->_mediumNode->GetPosition()))
5151 nPos->SetParameters( newUV.X(), newUV.Y() );
5153 if ( (XYZ((*link1)->node1()) - XYZ((*link1)->node2())).SquareModulus() <
5154 move.SquareMagnitude())
5156 gp_XY uv0 = faceHlp.GetNodeUV( face, (*link0)->_mediumNode, 0, &checkUV );
5157 gp_XY uv2 = faceHlp.GetNodeUV( face, (*link2)->_mediumNode, 0, &checkUV );
5158 MSG( "TOO LONG MOVE \t" <<
5159 "uv0: "<<uv0.X()<<", "<<uv0.Y()<<" \t" <<
5160 "uv2: "<<uv2.X()<<", "<<uv2.Y()<<" \t" <<
5161 "uvOld: "<<oldUV.X()<<", "<<oldUV.Y()<<" \t" <<
5162 "newUV: "<<newUV.X()<<", "<<newUV.Y()<<" \t");
5163 uv0.SetX( uv2.X() ); // avoid warning: variable set but not used
5166 (*link1)->Move( move, /*sum=*/false, /*is2dFixed=*/true );
5168 MSG( "Move " << (*link1)->_mediumNode->GetID() << " following "
5169 << chain.front()->_mediumNode->GetID() <<"-"
5170 << chain.back ()->_mediumNode->GetID() <<
5171 " by " << move.Magnitude());
5173 } // loop on chains of links
5174 } // loop on 2 directions of propagation from quadrangle
5176 } // fix faces and/or volumes
5181 TIDSortedElemSet biQuadQuas, biQuadTris, triQuadHexa;
5182 const bool toFixCentralNodes = ( myMesh->NbBiQuadQuadrangles() +
5183 myMesh->NbBiQuadTriangles() +
5184 myMesh->NbTriQuadraticHexas() );
5186 faceHlp.ToFixNodeParameters( true );
5188 for ( pLink = links.begin(); pLink != links.end(); ++pLink ) {
5189 if ( pLink->IsMoved() )
5191 gp_Pnt p = pLink->MiddlePnt() + pLink->Move();
5193 // put on surface nodes on FACE but moved in 3D (23050)
5194 if ( !pLink->IsFixedOnSurface() )
5196 faceHlp.SetSubShape( pLink->_mediumNode->getshapeId() );
5197 if ( faceHlp.GetSubShape().ShapeType() == TopAbs_FACE )
5199 const_cast<SMDS_MeshNode*>( pLink->_mediumNode )->setXYZ( p.X(), p.Y(), p.Z());
5200 p.Coord( distXYZ[1], distXYZ[2], distXYZ[3] );
5201 gp_XY uv( Precision::Infinite(), 0 );
5202 if ( faceHlp.CheckNodeUV( TopoDS::Face( faceHlp.GetSubShape() ), pLink->_mediumNode,
5203 uv, /*tol=*/pLink->Move().Modulus(), /*force=*/true, distXYZ ))
5204 p.SetCoord( distXYZ[1], distXYZ[2], distXYZ[3] );
5207 GetMeshDS()->MoveNode( pLink->_mediumNode, p.X(), p.Y(), p.Z());
5209 // collect bi-quadratic elements
5210 if ( toFixCentralNodes )
5212 SMDS_ElemIteratorPtr eIt = pLink->_mediumNode->GetInverseElementIterator();
5213 while ( eIt->more() )
5215 const SMDS_MeshElement* e = eIt->next();
5216 switch( e->GetEntityType() ) {
5217 case SMDSEntity_BiQuad_Quadrangle: biQuadQuas.insert( e ); break;
5218 case SMDSEntity_BiQuad_Triangle: biQuadTris.insert( e ); break;
5219 case SMDSEntity_TriQuad_Hexa: triQuadHexa.insert( e ); break;
5226 // Fix positions of central nodes of bi-tri-quadratic elements
5228 // treat bi-quad quadrangles
5230 vector< const SMDS_MeshNode* > nodes( 9 );
5232 TIDSortedElemSet::iterator quadIt = biQuadQuas.begin();
5233 for ( ; quadIt != biQuadQuas.end(); ++quadIt )
5235 const SMDS_MeshElement* quad = *quadIt;
5238 nodes.assign( quad->begin_nodes(), quad->end_nodes() );
5240 TopoDS_Shape S = GetSubShapeByNode( nodes.back(), GetMeshDS() );
5241 if ( S.IsNull() || S.ShapeType() != TopAbs_FACE ) continue;
5242 const TopoDS_Face& F = TopoDS::Face( S );
5243 Handle( Geom_Surface ) surf = BRep_Tool::Surface( F, loc );
5244 const double tol = BRep_Tool::Tolerance( F );
5246 for ( int i = 0; i < 8; ++i )
5248 uv[ i ] = GetNodeUV( F, nodes[i], nodes[8], &checkUV );
5249 // as this method is used after mesh generation, UV of nodes is not
5250 // updated according to bending links, so we update
5251 if ( i > 3 && nodes[i]->GetPosition()->GetTypeOfPosition() == SMDS_TOP_FACE )
5252 CheckNodeUV( F, nodes[i], uv[ i ], 2*tol, /*force=*/true );
5254 AdjustByPeriod( F, uv, 8 ); // put uv[] within a period (IPAL52698)
5255 // move the central node
5256 gp_XY uvCent = calcTFI (0.5, 0.5, uv[0],uv[1],uv[2],uv[3],uv[4],uv[5],uv[6],uv[7] );
5257 gp_Pnt p = surf->Value( uvCent.X(), uvCent.Y() ).Transformed( loc );
5258 GetMeshDS()->MoveNode( nodes[8], p.X(), p.Y(), p.Z());
5262 // treat bi-quad triangles
5264 vector< const SMDS_MeshNode* > nodes;
5266 TIDSortedElemSet::iterator triIt = biQuadTris.begin();
5267 for ( ; triIt != biQuadTris.end(); ++triIt )
5269 const SMDS_MeshElement* tria = *triIt;
5271 const TopoDS_Shape& S = GetMeshDS()->IndexToShape( tria->getshapeId() );
5272 if ( S.IsNull() || S.ShapeType() != TopAbs_FACE ) continue;
5273 const TopoDS_Face& F = TopoDS::Face( S );
5274 Handle( Geom_Surface ) surf = BRep_Tool::Surface( F, loc );
5275 const double tol = BRep_Tool::Tolerance( F );
5278 nodes.assign( tria->begin_nodes(), tria->end_nodes() );
5280 bool uvOK = true, badTria = false;
5281 for ( int i = 0; i < 6; ++i )
5283 uv[ i ] = GetNodeUV( F, nodes[i], nodes[(i+1)%3], &uvOK );
5284 // as this method is used after mesh generation, UV of nodes is not
5285 // updated according to bending links, so we update
5286 if ( nodes[i]->GetPosition()->GetTypeOfPosition() == SMDS_TOP_FACE )
5287 CheckNodeUV( F, nodes[i], uv[ i ], 2*tol, /*force=*/true );
5290 // move the central node
5292 if ( !uvOK || badTria )
5294 p = ( SMESH_TNodeXYZ( nodes[3] ) +
5295 SMESH_TNodeXYZ( nodes[4] ) +
5296 SMESH_TNodeXYZ( nodes[5] )) / 3;
5300 AdjustByPeriod( F, uv, 6 ); // put uv[] within a period (IPAL52698)
5301 gp_XY uvCent = GetCenterUV( uv[0], uv[1], uv[2], uv[3], uv[4], uv[5], &badTria );
5302 p = surf->Value( uvCent.X(), uvCent.Y() ).Transformed( loc );
5304 GetMeshDS()->MoveNode( tria->GetNode(6), p.X(), p.Y(), p.Z() );
5308 // treat tri-quadratic hexahedra
5310 SMDS_VolumeTool volExp;
5311 TIDSortedElemSet::iterator hexIt = triQuadHexa.begin();
5312 for ( ; hexIt != triQuadHexa.end(); ++hexIt )
5314 volExp.Set( *hexIt, /*ignoreCentralNodes=*/false );
5316 // fix nodes central in sides
5317 for ( int iQuad = 0; iQuad < volExp.NbFaces(); ++iQuad )
5319 const SMDS_MeshNode** quadNodes = volExp.GetFaceNodes( iQuad );
5320 if ( quadNodes[8]->GetPosition()->GetTypeOfPosition() == SMDS_TOP_3DSPACE )
5322 gp_XYZ p = calcTFI( 0.5, 0.5,
5323 SMESH_TNodeXYZ( quadNodes[0] ), SMESH_TNodeXYZ( quadNodes[2] ),
5324 SMESH_TNodeXYZ( quadNodes[4] ), SMESH_TNodeXYZ( quadNodes[6] ),
5325 SMESH_TNodeXYZ( quadNodes[1] ), SMESH_TNodeXYZ( quadNodes[3] ),
5326 SMESH_TNodeXYZ( quadNodes[5] ), SMESH_TNodeXYZ( quadNodes[7] ));
5327 GetMeshDS()->MoveNode( quadNodes[8], p.X(), p.Y(), p.Z());
5331 // fix the volume central node
5332 vector<gp_XYZ> pointsOnShapes( SMESH_Block::ID_Shell );
5333 const SMDS_MeshNode** hexNodes = volExp.GetNodes();
5335 pointsOnShapes[ SMESH_Block::ID_V000 ] = SMESH_TNodeXYZ( hexNodes[ 0 ] );
5336 pointsOnShapes[ SMESH_Block::ID_V100 ] = SMESH_TNodeXYZ( hexNodes[ 3 ] );
5337 pointsOnShapes[ SMESH_Block::ID_V010 ] = SMESH_TNodeXYZ( hexNodes[ 1 ] );
5338 pointsOnShapes[ SMESH_Block::ID_V110 ] = SMESH_TNodeXYZ( hexNodes[ 2 ] );
5339 pointsOnShapes[ SMESH_Block::ID_V001 ] = SMESH_TNodeXYZ( hexNodes[ 4 ] );
5340 pointsOnShapes[ SMESH_Block::ID_V101 ] = SMESH_TNodeXYZ( hexNodes[ 7 ] );
5341 pointsOnShapes[ SMESH_Block::ID_V011 ] = SMESH_TNodeXYZ( hexNodes[ 5 ] );
5342 pointsOnShapes[ SMESH_Block::ID_V111 ] = SMESH_TNodeXYZ( hexNodes[ 6 ] );
5344 pointsOnShapes[ SMESH_Block::ID_Ex00 ] = SMESH_TNodeXYZ( hexNodes[ 11 ] );
5345 pointsOnShapes[ SMESH_Block::ID_Ex10 ] = SMESH_TNodeXYZ( hexNodes[ 9 ] );
5346 pointsOnShapes[ SMESH_Block::ID_E0y0 ] = SMESH_TNodeXYZ( hexNodes[ 8 ] );
5347 pointsOnShapes[ SMESH_Block::ID_E1y0 ] = SMESH_TNodeXYZ( hexNodes[ 10 ] );
5348 pointsOnShapes[ SMESH_Block::ID_Ex01 ] = SMESH_TNodeXYZ( hexNodes[ 15 ] );
5349 pointsOnShapes[ SMESH_Block::ID_Ex11 ] = SMESH_TNodeXYZ( hexNodes[ 13 ] );
5350 pointsOnShapes[ SMESH_Block::ID_E0y1 ] = SMESH_TNodeXYZ( hexNodes[ 12 ] );
5351 pointsOnShapes[ SMESH_Block::ID_E1y1 ] = SMESH_TNodeXYZ( hexNodes[ 14 ] );
5352 pointsOnShapes[ SMESH_Block::ID_E00z ] = SMESH_TNodeXYZ( hexNodes[ 16 ] );
5353 pointsOnShapes[ SMESH_Block::ID_E10z ] = SMESH_TNodeXYZ( hexNodes[ 19 ] );
5354 pointsOnShapes[ SMESH_Block::ID_E01z ] = SMESH_TNodeXYZ( hexNodes[ 17 ] );
5355 pointsOnShapes[ SMESH_Block::ID_E11z ] = SMESH_TNodeXYZ( hexNodes[ 18 ] );
5357 pointsOnShapes[ SMESH_Block::ID_Fxy0 ] = SMESH_TNodeXYZ( hexNodes[ 20 ] );
5358 pointsOnShapes[ SMESH_Block::ID_Fxy1 ] = SMESH_TNodeXYZ( hexNodes[ 25 ] );
5359 pointsOnShapes[ SMESH_Block::ID_Fx0z ] = SMESH_TNodeXYZ( hexNodes[ 21 ] );
5360 pointsOnShapes[ SMESH_Block::ID_Fx1z ] = SMESH_TNodeXYZ( hexNodes[ 23 ] );
5361 pointsOnShapes[ SMESH_Block::ID_F0yz ] = SMESH_TNodeXYZ( hexNodes[ 24 ] );
5362 pointsOnShapes[ SMESH_Block::ID_F1yz ] = SMESH_TNodeXYZ( hexNodes[ 22 ] );
5364 gp_XYZ nCenterParams(0.5, 0.5, 0.5), nCenterCoords;
5365 SMESH_Block::ShellPoint( nCenterParams, pointsOnShapes, nCenterCoords );
5366 GetMeshDS()->MoveNode( hexNodes[26],
5367 nCenterCoords.X(), nCenterCoords.Y(), nCenterCoords.Z());
5371 // avoid warning: defined but not used operator<<()
5372 SMESH_Comment() << *links.begin() << *faces.begin();
5376 //================================================================================
5380 //================================================================================
5382 void SMESH_MesherHelper::WriteShape(const TopoDS_Shape& s)
5384 const char* name = "/tmp/shape.brep";
5385 BRepTools::Write( s, name );
5387 std::cout << name << std::endl;