1 // Copyright (C) 2007-2020 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_MeshEditor.hxx"
40 #include "SMESH_ProxyMesh.hxx"
41 #include "SMESH_subMesh.hxx"
43 #include <BRepAdaptor_Curve.hxx>
44 #include <BRepAdaptor_Surface.hxx>
45 #include <BRepTools.hxx>
46 #include <BRep_Tool.hxx>
47 #include <Geom2d_Curve.hxx>
48 #include <GeomAPI_ProjectPointOnCurve.hxx>
49 #include <GeomAPI_ProjectPointOnSurf.hxx>
50 #include <Geom_Curve.hxx>
51 #include <Geom_RectangularTrimmedSurface.hxx>
52 #include <Geom_Surface.hxx>
53 #include <ShapeAnalysis.hxx>
55 #include <TopExp_Explorer.hxx>
56 #include <TopTools_ListIteratorOfListOfShape.hxx>
57 #include <TopTools_MapIteratorOfMapOfShape.hxx>
58 #include <TopTools_MapOfShape.hxx>
61 #include <gp_Pnt2d.hxx>
62 #include <gp_Trsf.hxx>
64 #include <Standard_Failure.hxx>
65 #include <Standard_ErrorHandler.hxx>
67 #include <utilities.h>
73 #define RETURN_BAD_RESULT(msg) { MESSAGE(msg); return false; }
77 inline SMESH_NodeXYZ XYZ(const SMDS_MeshNode* n) { return SMESH_NodeXYZ(n); }
79 enum { U_periodic = 1, V_periodic = 2 };
82 //================================================================================
86 //================================================================================
88 SMESH_MesherHelper::SMESH_MesherHelper(SMESH_Mesh& theMesh)
92 myCreateQuadratic(false),
93 myCreateBiQuadratic(false),
94 myFixNodeParameters(false)
96 myPar1[0] = myPar2[0] = myPar1[1] = myPar2[1] = 0;
97 mySetElemOnShape = ( ! myMesh->HasShapeToMesh() );
100 //=======================================================================
101 //function : ~SMESH_MesherHelper
103 //=======================================================================
105 SMESH_MesherHelper::~SMESH_MesherHelper()
108 TID2ProjectorOnSurf::iterator i_proj = myFace2Projector.begin();
109 for ( ; i_proj != myFace2Projector.end(); ++i_proj )
110 delete i_proj->second;
113 TID2ProjectorOnCurve::iterator i_proj = myEdge2Projector.begin();
114 for ( ; i_proj != myEdge2Projector.end(); ++i_proj )
115 delete i_proj->second;
119 //================================================================================
121 * \brief Return SMESH_Gen
123 //================================================================================
125 SMESH_Gen* SMESH_MesherHelper::GetGen() const
127 return GetMesh()->GetGen();
130 //================================================================================
132 * \brief Return mesh DS
134 //================================================================================
136 SMESHDS_Mesh* SMESH_MesherHelper::GetMeshDS() const
138 return GetMesh()->GetMeshDS();
141 //=======================================================================
142 //function : IsQuadraticSubMesh
143 //purpose : Check sub-meshes of a given shape: if all elements on sub-shapes
144 // are quadratic, quadratic elements will be created.
145 // Fill myTLinkNodeMap
146 //=======================================================================
148 bool SMESH_MesherHelper::IsQuadraticSubMesh(const TopoDS_Shape& aSh)
150 SMESHDS_Mesh* meshDS = GetMeshDS();
151 // we can create quadratic elements only if all elements
152 // created on sub-shapes of given shape are quadratic
153 myCreateQuadratic = true;
154 TopAbs_ShapeEnum subType( aSh.ShapeType()==TopAbs_FACE ? TopAbs_EDGE : TopAbs_FACE );
155 if ( aSh.ShapeType()==TopAbs_COMPOUND )
157 TopoDS_Iterator subIt( aSh );
159 subType = ( subIt.Value().ShapeType()==TopAbs_FACE ) ? TopAbs_EDGE : TopAbs_FACE;
161 SMDSAbs_ElementType elemType( subType==TopAbs_FACE ? SMDSAbs_Face : SMDSAbs_Edge );
163 if ( !myMesh->HasShapeToMesh() )
165 if (( myCreateQuadratic = myMesh->NbFaces( ORDER_QUADRATIC )))
167 SMDS_FaceIteratorPtr fIt = meshDS->facesIterator();
168 while ( fIt->more() )
169 AddTLinks( static_cast< const SMDS_MeshFace* >( fIt->next() ));
174 TopExp_Explorer exp( aSh, subType );
175 TopTools_MapOfShape checkedSubShapes;
176 for (; exp.More() && myCreateQuadratic; exp.Next()) {
177 if ( !checkedSubShapes.Add( exp.Current() ))
178 continue; // needed if aSh is compound of solids
179 if ( SMESHDS_SubMesh * subMesh = meshDS->MeshElements( exp.Current() )) {
180 if ( SMDS_ElemIteratorPtr it = subMesh->GetElements() ) {
182 const SMDS_MeshElement* e = it->next();
183 if ( e->GetType() != elemType || !e->IsQuadratic() ) {
184 myCreateQuadratic = false;
189 switch ( e->NbCornerNodes() ) {
191 AddTLinkNode(e->GetNode(0),e->GetNode(1),e->GetNode(2)); break;
193 AddTLinkNode(e->GetNode(0),e->GetNode(1),e->GetNode(3));
194 AddTLinkNode(e->GetNode(1),e->GetNode(2),e->GetNode(4));
195 AddTLinkNode(e->GetNode(2),e->GetNode(0),e->GetNode(5)); break;
197 AddTLinkNode(e->GetNode(0),e->GetNode(1),e->GetNode(4));
198 AddTLinkNode(e->GetNode(1),e->GetNode(2),e->GetNode(5));
199 AddTLinkNode(e->GetNode(2),e->GetNode(3),e->GetNode(6));
200 AddTLinkNode(e->GetNode(3),e->GetNode(0),e->GetNode(7));
203 myCreateQuadratic = false;
213 // if ( nbOldLinks == myTLinkNodeMap.size() ) -- 0023068
214 if ( myTLinkNodeMap.empty() )
215 myCreateQuadratic = false;
217 if ( !myCreateQuadratic )
218 myTLinkNodeMap.clear();
222 return myCreateQuadratic;
225 //=======================================================================
226 //function : SetSubShape
227 //purpose : Set geometry to make elements on
228 //=======================================================================
230 void SMESH_MesherHelper::SetSubShape(const int aShID)
232 if ( aShID == myShapeID )
235 SetSubShape( GetMeshDS()->IndexToShape( aShID ));
237 SetSubShape( TopoDS_Shape() );
240 //=======================================================================
241 //function : SetSubShape
242 //purpose : Set geometry to create elements on
243 //=======================================================================
245 void SMESH_MesherHelper::SetSubShape(const TopoDS_Shape& aSh)
247 if ( myShape.IsSame( aSh ))
251 mySeamShapeIds.clear();
252 myDegenShapeIds.clear();
254 if ( myShape.IsNull() ) {
258 SMESHDS_Mesh* meshDS = GetMeshDS();
259 myShapeID = meshDS->ShapeToIndex(aSh);
262 // treatment of periodic faces
263 for ( TopExp_Explorer eF( aSh, TopAbs_FACE ); eF.More(); eF.Next() )
265 const TopoDS_Face& face = TopoDS::Face( eF.Current() );
266 BRepAdaptor_Surface surf( face, false );
267 if ( surf.IsUPeriodic() || surf.IsUClosed() ) {
268 myParIndex |= U_periodic;
269 myPar1[0] = surf.FirstUParameter();
270 myPar2[0] = surf.LastUParameter();
272 if ( surf.IsVPeriodic() || surf.IsVClosed() ) {
273 myParIndex |= V_periodic;
274 myPar1[1] = surf.FirstVParameter();
275 myPar2[1] = surf.LastVParameter();
279 for (TopExp_Explorer exp( face, TopAbs_EDGE ); exp.More(); exp.Next())
281 // look for a "seam" edge, a real seam or an edge on period boundary
282 TopoDS_Edge edge = TopoDS::Edge( exp.Current() );
283 const int edgeID = meshDS->ShapeToIndex( edge );
286 BRep_Tool::UVPoints( edge, face, uv1, uv2 );
287 const double du = Abs( uv1.Coord(1) - uv2.Coord(1) );
288 const double dv = Abs( uv1.Coord(2) - uv2.Coord(2) );
290 bool isSeam = BRep_Tool::IsClosed( edge, face );
291 if ( isSeam ) // real seam - having two pcurves on face
293 // pcurve can lie not on pediod boundary (22582, mesh_Quadratic_01/C9)
296 double u1 = uv1.Coord(1);
298 BRep_Tool::UVPoints( edge, face, uv1, uv2 );
299 double u2 = uv1.Coord(1);
300 myPar1[0] = Min( u1, u2 );
301 myPar2[0] = Max( u1, u2 );
302 myParIndex |= U_periodic;
306 double v1 = uv1.Coord(2);
308 BRep_Tool::UVPoints( edge, face, uv1, uv2 );
309 double v2 = uv1.Coord(2);
310 myPar1[1] = Min( v1, v2 );
311 myPar2[1] = Max( v1, v2 );
312 myParIndex |= V_periodic;
315 else //if ( !isSeam )
317 // one pcurve but on period boundary (22772, mesh_Quadratic_01/D1)
318 if (( myParIndex & U_periodic ) && du < Precision::PConfusion() )
320 isSeam = ( Abs( uv1.Coord(1) - myPar1[0] ) < Precision::PConfusion() ||
321 Abs( uv1.Coord(1) - myPar2[0] ) < Precision::PConfusion() );
323 else if (( myParIndex & V_periodic ) && dv < Precision::PConfusion() )
325 isSeam = ( Abs( uv1.Coord(2) - myPar1[1] ) < Precision::PConfusion() ||
326 Abs( uv1.Coord(2) - myPar2[1] ) < Precision::PConfusion() );
328 if ( isSeam ) // vertices are on period boundary, check a middle point (23032)
330 double f,l, r = 0.2345;
331 Handle(Geom2d_Curve) C2d = BRep_Tool::CurveOnSurface( edge, face, f, l );
338 uv2 = C2d->Value( f * r + l * ( 1.-r ));
339 if ( du < Precision::PConfusion() )
340 isSeam = ( Abs( uv1.Coord(1) - uv2.Coord(1) ) < Precision::PConfusion() );
342 isSeam = ( Abs( uv1.Coord(2) - uv2.Coord(2) ) < Precision::PConfusion() );
348 // store seam shape indices, negative if shape encounters twice ('real seam')
349 mySeamShapeIds.insert( IsSeamShape( edgeID ) ? -edgeID : edgeID );
350 for ( TopExp_Explorer v( edge, TopAbs_VERTEX ); v.More(); v.Next() ) {
351 int vertexID = meshDS->ShapeToIndex( v.Current() );
352 mySeamShapeIds.insert( IsSeamShape( vertexID ) ? -vertexID : vertexID );
356 // look for a degenerated edge
357 if ( SMESH_Algo::isDegenerated( edge )) {
358 myDegenShapeIds.insert( edgeID );
359 for ( TopExp_Explorer v( edge, TopAbs_VERTEX ); v.More(); v.Next() )
360 myDegenShapeIds.insert( meshDS->ShapeToIndex( v.Current() ));
362 if ( !BRep_Tool::SameParameter( edge ) ||
363 !BRep_Tool::SameRange( edge ))
365 setPosOnShapeValidity( edgeID, false );
371 //=======================================================================
373 * \brief Copy shape information from another helper. Used to improve performance
374 * since SetSubShape() can be time consuming if there are many edges
376 //=======================================================================
378 void SMESH_MesherHelper::CopySubShapeInfo(const SMESH_MesherHelper& other)
380 this->myShape = other.myShape;
381 this->myShapeID = other.myShapeID;
382 this->myDegenShapeIds = other.myDegenShapeIds;
383 this->mySeamShapeIds = other.mySeamShapeIds;
384 this->myPar1[0] = other.myPar1[0];
385 this->myPar1[1] = other.myPar1[1];
386 this->myPar2[0] = other.myPar2[0];
387 this->myPar2[1] = other.myPar2[1];
388 this->myParIndex = other.myParIndex;
389 this->myFace2Surface = other.myFace2Surface;
392 //=======================================================================
393 //function : ShapeToIndex
394 //purpose : Convert a shape to its index in the SMESHDS_Mesh
395 //=======================================================================
397 int SMESH_MesherHelper::ShapeToIndex( const TopoDS_Shape& S ) const
399 return GetMeshDS()->ShapeToIndex( S );
402 //=======================================================================
403 //function : GetNodeUVneedInFaceNode
404 //purpose : Check if inFaceNode argument is necessary for call GetNodeUV(F,..)
405 // Return true if the face is periodic.
406 // If F is Null, answer about sub-shape set through IsQuadraticSubMesh() or
408 //=======================================================================
410 bool SMESH_MesherHelper::GetNodeUVneedInFaceNode(const TopoDS_Face& F) const
412 if ( F.IsNull() ) return !mySeamShapeIds.empty();
414 if ( !F.IsNull() && !myShape.IsNull() && myShape.IsSame( F ))
415 return !mySeamShapeIds.empty();
418 Handle(Geom_Surface) aSurface = BRep_Tool::Surface( F,loc );
419 if ( !aSurface.IsNull() )
420 return ( aSurface->IsUPeriodic() || aSurface->IsVPeriodic() );
425 //=======================================================================
426 //function : IsMedium
428 //=======================================================================
430 bool SMESH_MesherHelper::IsMedium(const SMDS_MeshNode* node,
431 const SMDSAbs_ElementType typeToCheck)
433 return SMESH_MeshEditor::IsMedium( node, typeToCheck );
436 //=======================================================================
437 //function : GetSubShapeByNode
438 //purpose : Return support shape of a node
439 //=======================================================================
441 TopoDS_Shape SMESH_MesherHelper::GetSubShapeByNode(const SMDS_MeshNode* node,
442 const SMESHDS_Mesh* meshDS)
444 int shapeID = node ? node->getshapeId() : 0;
445 if ( 0 < shapeID && shapeID <= meshDS->MaxShapeIndex() )
446 return meshDS->IndexToShape( shapeID );
448 return TopoDS_Shape();
452 //=======================================================================
453 //function : AddTLinkNode
454 //purpose : add a link in my data structure
455 //=======================================================================
457 void SMESH_MesherHelper::AddTLinkNode(const SMDS_MeshNode* n1,
458 const SMDS_MeshNode* n2,
459 const SMDS_MeshNode* n12)
461 // add new record to map
462 SMESH_TLink link( n1, n2 );
463 myTLinkNodeMap.insert( make_pair(link,n12));
466 //================================================================================
468 * \brief Add quadratic links of edge to own data structure
470 //================================================================================
472 bool SMESH_MesherHelper::AddTLinks(const SMDS_MeshEdge* edge)
474 if ( edge && edge->IsQuadratic() )
475 AddTLinkNode(edge->GetNode(0), edge->GetNode(1), edge->GetNode(2));
481 //================================================================================
483 * \brief Add quadratic links of face to own data structure
485 //================================================================================
487 bool SMESH_MesherHelper::AddTLinks(const SMDS_MeshFace* f)
491 switch ( f->NbNodes() ) {
493 // myMapWithCentralNode.insert
494 // ( make_pair( TBiQuad( f->GetNode(0),f->GetNode(1),f->GetNode(2) ),
496 // break; -- add medium nodes as well
498 AddTLinkNode(f->GetNode(0),f->GetNode(1),f->GetNode(3));
499 AddTLinkNode(f->GetNode(1),f->GetNode(2),f->GetNode(4));
500 AddTLinkNode(f->GetNode(2),f->GetNode(0),f->GetNode(5)); break;
503 // myMapWithCentralNode.insert
504 // ( make_pair( TBiQuad( f->GetNode(0),f->GetNode(1),f->GetNode(2),f->GetNode(3) ),
506 // break; -- add medium nodes as well
508 AddTLinkNode(f->GetNode(0),f->GetNode(1),f->GetNode(4));
509 AddTLinkNode(f->GetNode(1),f->GetNode(2),f->GetNode(5));
510 AddTLinkNode(f->GetNode(2),f->GetNode(3),f->GetNode(6));
511 AddTLinkNode(f->GetNode(3),f->GetNode(0),f->GetNode(7)); break;
518 //================================================================================
520 * \brief Add quadratic links of volume to own data structure
522 //================================================================================
524 bool SMESH_MesherHelper::AddTLinks(const SMDS_MeshVolume* volume)
526 if ( volume->IsQuadratic() )
528 SMDS_VolumeTool vTool( volume );
529 const SMDS_MeshNode** nodes = vTool.GetNodes();
531 for ( int iF = 1; iF < vTool.NbFaces(); ++iF )
533 const int nbN = vTool.NbFaceNodes( iF );
534 const int* iNodes = vTool.GetFaceNodesIndices( iF );
535 for ( int i = 0; i < nbN; )
537 int iN1 = iNodes[i++];
538 int iN12 = iNodes[i++];
540 if ( iN1 > iN2 ) std::swap( iN1, iN2 );
541 int linkID = iN1 * vTool.NbNodes() + iN2;
542 pair< set<int>::iterator, bool > it_isNew = addedLinks.insert( linkID );
543 if ( it_isNew.second )
544 AddTLinkNode( nodes[iN1], nodes[iN2], nodes[iN12] );
546 addedLinks.erase( it_isNew.first ); // each link encounters only twice
548 if ( vTool.NbNodes() == 27 )
550 const SMDS_MeshNode* nFCenter = nodes[ vTool.GetCenterNodeIndex( iF )];
551 if ( nFCenter->GetPosition()->GetTypeOfPosition() == SMDS_TOP_3DSPACE )
552 myMapWithCentralNode.insert
553 ( make_pair( TBiQuad( nodes[ iNodes[0]], nodes[ iNodes[1]],
554 nodes[ iNodes[2]], nodes[ iNodes[3]] ),
563 //================================================================================
565 * \brief Return true if position of nodes on the shape hasn't yet been checked or
566 * the positions proved to be invalid
568 //================================================================================
570 bool SMESH_MesherHelper::toCheckPosOnShape(int shapeID ) const
572 map< int,bool >::const_iterator id_ok = myNodePosShapesValidity.find( shapeID );
573 return ( id_ok == myNodePosShapesValidity.end() || !id_ok->second );
576 //================================================================================
578 * \brief Set validity of positions of nodes on the shape.
579 * Once set, validity is not changed
581 //================================================================================
583 void SMESH_MesherHelper::setPosOnShapeValidity(int shapeID, bool ok ) const
585 std::map< int,bool >::iterator sh_ok =
586 ((SMESH_MesherHelper*)this)->myNodePosShapesValidity.insert( make_pair( shapeID, ok)).first;
591 //=======================================================================
592 //function : ToFixNodeParameters
593 //purpose : Enables fixing node parameters on EDGEs and FACEs in
594 // GetNodeU(...,check=true), GetNodeUV(...,check=true), CheckNodeUV() and
595 // CheckNodeU() in case if a node lies on a shape set via SetSubShape().
597 //=======================================================================
599 void SMESH_MesherHelper::ToFixNodeParameters(bool toFix)
601 myFixNodeParameters = toFix;
605 //=======================================================================
606 //function : getUVOnSeam
607 //purpose : Select UV on either of 2 pcurves of a seam edge, closest to the given UV
608 //=======================================================================
610 gp_Pnt2d SMESH_MesherHelper::getUVOnSeam( const gp_Pnt2d& uv1, const gp_Pnt2d& uv2 ) const
612 gp_Pnt2d result = uv1;
613 for ( int i = U_periodic; i <= V_periodic ; ++i )
615 if ( myParIndex & i )
617 double p1 = uv1.Coord( i );
618 double dp1 = Abs( p1-myPar1[i-1]), dp2 = Abs( p1-myPar2[i-1]);
619 if ( myParIndex == i ||
620 dp1 < ( myPar2[i-1] - myPar1[i-1] ) / 100. ||
621 dp2 < ( myPar2[i-1] - myPar1[i-1] ) / 100. )
623 double p2 = uv2.Coord( i );
624 double p1Alt = ( dp1 < dp2 ) ? myPar2[i-1] : myPar1[i-1];
625 if ( Abs( p2 - p1 ) > Abs( p2 - p1Alt ))
626 result.SetCoord( i, p1Alt );
633 //=======================================================================
634 //function : GetNodeUV
635 //purpose : Return node UV on face
636 //=======================================================================
638 gp_XY SMESH_MesherHelper::GetNodeUV(const TopoDS_Face& F,
639 const SMDS_MeshNode* n,
640 const SMDS_MeshNode* n2,
643 gp_Pnt2d uv( Precision::Infinite(), Precision::Infinite() );
645 SMDS_PositionPtr pos = n->GetPosition();
647 if ( pos->GetTypeOfPosition() == SMDS_TOP_FACE )
649 // node has position on face
650 SMDS_FacePositionPtr fpos = pos;
651 uv.SetCoord( fpos->GetUParameter(), fpos->GetVParameter() );
653 uvOK = CheckNodeUV( F, n, uv.ChangeCoord(), 2.*getFaceMaxTol( F )); // 2. from 22830
655 else if ( pos->GetTypeOfPosition() == SMDS_TOP_EDGE )
657 // node has position on EDGE => it is needed to find
658 // corresponding EDGE from FACE, get pcurve for this
659 // EDGE and retrieve value from this pcurve
660 SMDS_EdgePositionPtr epos = pos;
661 const int edgeID = n->getshapeId();
662 const TopoDS_Edge& E = TopoDS::Edge( GetMeshDS()->IndexToShape( edgeID ));
663 double f, l, u = epos->GetUParameter();
664 Handle(Geom2d_Curve) C2d = BRep_Tool::CurveOnSurface( E, F, f, l );
665 bool validU = ( !C2d.IsNull() && ( f < u ) && ( u < l ));
666 if ( validU ) uv = C2d->Value( u );
667 else uv.SetCoord( Precision::Infinite(),0.);
668 if ( check || !validU )
669 uvOK = CheckNodeUV( F, n, uv.ChangeCoord(), 2.*getFaceMaxTol( F ),/*force=*/ !validU );
671 // for a node on a seam EDGE select one of UVs on 2 pcurves
672 if ( n2 && IsSeamShape( edgeID ))
674 uv = getUVOnSeam( uv, GetNodeUV( F, n2, 0, check ));
677 { // adjust uv to period
679 Handle(Geom_Surface) S = BRep_Tool::Surface(F,loc);
680 Standard_Boolean isUPeriodic = S->IsUPeriodic();
681 Standard_Boolean isVPeriodic = S->IsVPeriodic();
683 if ( isUPeriodic || isVPeriodic ) {
684 Standard_Real UF,UL,VF,VL;
685 S->Bounds(UF,UL,VF,VL);
686 if ( isUPeriodic ) newUV.SetX( uv.X() + ShapeAnalysis::AdjustToPeriod(uv.X(),UF,UL));
687 if ( isVPeriodic ) newUV.SetY( uv.Y() + ShapeAnalysis::AdjustToPeriod(uv.Y(),VF,VL));
691 gp_Pnt2d uv2 = GetNodeUV( F, n2, 0, check );
692 if ( isUPeriodic && Abs( uv.X()-uv2.X() ) < Abs( newUV.X()-uv2.X() ))
693 newUV.SetX( uv.X() );
694 if ( isVPeriodic && Abs( uv.Y()-uv2.Y() ) < Abs( newUV.Y()-uv2.Y() ))
695 newUV.SetY( uv.Y() );
701 else if ( pos->GetTypeOfPosition() == SMDS_TOP_VERTEX )
703 if ( int vertexID = n->getshapeId() ) {
704 const TopoDS_Vertex& V = TopoDS::Vertex(GetMeshDS()->IndexToShape(vertexID));
706 uv = BRep_Tool::Parameters( V, F );
709 catch (Standard_Failure& exc) {
713 if ( !IsSubShape( V, F ))
715 MESSAGE("GetNodeUV() Vertex "<< vertexID <<" not in face "<< GetMeshDS()->ShapeToIndex(F));
716 // get UV of a vertex closest to the node
718 gp_Pnt pn = XYZ( n );
719 for ( TopExp_Explorer vert( F,TopAbs_VERTEX ); !uvOK && vert.More(); vert.Next() ) {
720 TopoDS_Vertex curV = TopoDS::Vertex( vert.Current() );
721 gp_Pnt p = BRep_Tool::Pnt( curV );
722 double curDist = p.SquareDistance( pn );
723 if ( curDist < dist ) {
725 uv = BRep_Tool::Parameters( curV, F );
726 uvOK = ( dist < DBL_MIN );
733 TopTools_ListIteratorOfListOfShape it( myMesh->GetAncestors( V ));
734 for ( ; it.More(); it.Next() ) {
735 if ( it.Value().ShapeType() == TopAbs_EDGE ) {
736 const TopoDS_Edge & edge = TopoDS::Edge( it.Value() );
738 Handle(Geom2d_Curve) C2d = BRep_Tool::CurveOnSurface(edge, F, f, l);
739 if ( !C2d.IsNull() ) {
740 double u = ( V == IthVertex( 0, edge )) ? f : l;
741 uv = C2d->Value( u );
742 gp_Pnt p = GetSurface( F )->Value( uv );
743 uvOK = ( p.Distance( BRep_Tool::Pnt( V )) < getFaceMaxTol( F ));
748 if ( !uvOK && V.Orientation() == TopAbs_INTERNAL )
750 Handle(ShapeAnalysis_Surface) projector = GetSurface( F );
751 if ( n2 ) uv = GetNodeUV( F, n2 );
752 if ( Precision::IsInfinite( uv.X() ))
753 uv = projector->NextValueOfUV( uv, BRep_Tool::Pnt( V ), BRep_Tool::Tolerance( F ));
755 uv = projector->ValueOfUV( BRep_Tool::Pnt( V ), BRep_Tool::Tolerance( F ));
756 uvOK = ( projector->Gap() < getFaceMaxTol( F ));
760 if ( n2 && IsSeamShape( vertexID ))
762 bool isSeam = ( myShape.IsSame( F ));
764 SMESH_MesherHelper h( *myMesh );
766 isSeam = IsSeamShape( vertexID );
770 uv = getUVOnSeam( uv, GetNodeUV( F, n2, 0 ));
776 uvOK = CheckNodeUV( F, n, uv.ChangeCoord(), 2.*getFaceMaxTol( F ));
779 if ( check && !uvOK )
785 //=======================================================================
786 //function : CheckNodeUV
787 //purpose : Check and fix node UV on a face
788 //=======================================================================
790 bool SMESH_MesherHelper::CheckNodeUV(const TopoDS_Face& F,
791 const SMDS_MeshNode* n,
795 double distXYZ[4]) const
797 int shapeID = n->getshapeId();
799 if (( infinit = ( Precision::IsInfinite( uv.X() ) || Precision::IsInfinite( uv.Y() ))) ||
801 ( uv.X() == 0. && uv.Y() == 0. ) ||
802 ( toCheckPosOnShape( shapeID )))
804 // check that uv is correct
806 Handle(Geom_Surface) surface = BRep_Tool::Surface( F,loc );
807 SMESH_NodeXYZ nXYZ( n );
808 gp_Pnt nodePnt = nXYZ, surfPnt(0,0,0);
810 if ( !loc.IsIdentity() ) nodePnt.Transform( loc.Transformation().Inverted() );
812 (dist = nodePnt.Distance( surfPnt = surface->Value( uv.X(), uv.Y() ))) > tol )
814 setPosOnShapeValidity( shapeID, false );
815 // uv incorrect, project the node to surface
816 Handle(ShapeAnalysis_Surface) sprojector = GetSurface( F );
817 uv = sprojector->ValueOfUV( nXYZ, tol ).XY();
818 surfPnt = sprojector->Value( uv );
819 dist = surfPnt.Distance( nXYZ );
822 distXYZ[1] = surfPnt.X(); distXYZ[2] = surfPnt.Y(); distXYZ[3]=surfPnt.Z();
826 MESSAGE( "SMESH_MesherHelper::CheckNodeUV(), invalid projection" );
829 // store the fixed UV on the face
830 if ( myShape.IsSame(F) && shapeID == myShapeID && myFixNodeParameters )
831 const_cast<SMDS_MeshNode*>(n)->SetPosition
832 ( SMDS_PositionPtr( new SMDS_FacePosition( uv.X(), uv.Y() )));
834 else if ( myShape.IsSame(F) && uv.Modulus() > numeric_limits<double>::min() )
836 setPosOnShapeValidity( shapeID, true );
842 //=======================================================================
843 //function : GetProjector
844 //purpose : Return projector initialized by given face without location, which is returned
845 //=======================================================================
847 GeomAPI_ProjectPointOnSurf& SMESH_MesherHelper::GetProjector(const TopoDS_Face& F,
848 TopLoc_Location& loc,
851 Handle(Geom_Surface) surface = BRep_Tool::Surface( F,loc );
852 int faceID = GetMeshDS()->ShapeToIndex( F );
853 TID2ProjectorOnSurf& i2proj = const_cast< TID2ProjectorOnSurf&>( myFace2Projector );
854 TID2ProjectorOnSurf::iterator i_proj = i2proj.find( faceID );
855 if ( i_proj == i2proj.end() )
857 if ( tol == 0 ) tol = BRep_Tool::Tolerance( F );
858 double U1, U2, V1, V2;
859 surface->Bounds(U1, U2, V1, V2);
860 GeomAPI_ProjectPointOnSurf* proj = new GeomAPI_ProjectPointOnSurf();
861 proj->Init( surface, U1, U2, V1, V2, tol );
862 i_proj = i2proj.insert( make_pair( faceID, proj )).first;
864 return *( i_proj->second );
867 //=======================================================================
868 //function : GetSurface
869 //purpose : Return a cached ShapeAnalysis_Surface of a FACE
870 //=======================================================================
872 Handle(ShapeAnalysis_Surface) SMESH_MesherHelper::GetSurface(const TopoDS_Face& F ) const
874 Handle(Geom_Surface) surface = BRep_Tool::Surface( F );
875 int faceID = GetMeshDS()->ShapeToIndex( F );
876 TID2Surface::iterator i_surf = myFace2Surface.find( faceID );
877 if ( i_surf == myFace2Surface.end() && faceID )
879 Handle(ShapeAnalysis_Surface) surf( new ShapeAnalysis_Surface( surface ));
880 i_surf = myFace2Surface.insert( make_pair( faceID, surf )).first;
882 return i_surf->second;
887 gp_XY AverageUV(const gp_XY& uv1, const gp_XY& uv2) { return ( uv1 + uv2 ) / 2.; }
888 gp_XY_FunPtr(Added); // define gp_XY_Added pointer to function calling gp_XY::Added(gp_XY)
889 gp_XY_FunPtr(Subtracted);
892 //=======================================================================
893 //function : ApplyIn2D
894 //purpose : Perform given operation on two 2d points in parameric space of given surface.
895 // It takes into account period of the surface. Use gp_XY_FunPtr macro
896 // to easily define pointer to function of gp_XY class.
897 //=======================================================================
899 gp_XY SMESH_MesherHelper::ApplyIn2D(Handle(Geom_Surface) surface,
903 const bool resultInPeriod)
905 if ( surface->IsKind(STANDARD_TYPE(Geom_RectangularTrimmedSurface )))
906 surface = Handle(Geom_RectangularTrimmedSurface)::DownCast( surface )->BasisSurface();
907 Standard_Boolean isUPeriodic = surface.IsNull() ? false : surface->IsUPeriodic();
908 Standard_Boolean isVPeriodic = surface.IsNull() ? false : surface->IsVPeriodic();
909 if ( !isUPeriodic && !isVPeriodic )
912 // move uv2 not far than half-period from uv1
914 uv2.X()+(isUPeriodic ? ShapeAnalysis::AdjustByPeriod(uv2.X(),uv1.X(),surface->UPeriod()) :0);
916 uv2.Y()+(isVPeriodic ? ShapeAnalysis::AdjustByPeriod(uv2.Y(),uv1.Y(),surface->VPeriod()) :0);
919 gp_XY res = fun( uv1, gp_XY(u2,v2) );
921 // move result within period
922 if ( resultInPeriod )
924 Standard_Real UF,UL,VF,VL;
925 surface->Bounds(UF,UL,VF,VL);
927 res.SetX( res.X() + ShapeAnalysis::AdjustToPeriod(res.X(),UF,UL));
929 res.SetY( res.Y() + ShapeAnalysis::AdjustToPeriod(res.Y(),VF,VL));
935 //=======================================================================
936 //function : AdjustByPeriod
937 //purpose : Move node positions on a FACE within surface period
938 //=======================================================================
940 void SMESH_MesherHelper::AdjustByPeriod( const TopoDS_Face& face, gp_XY uv[], const int nbUV )
942 SMESH_MesherHelper h( *myMesh ), *ph = face.IsSame( myShape ) ? this : &h;
943 ph->SetSubShape( face );
945 for ( int iCoo = U_periodic; iCoo <= V_periodic; ++iCoo )
946 if ( ph->GetPeriodicIndex() & iCoo )
948 const double period = ( ph->myPar2[iCoo-1] - ph->myPar1[iCoo-1] );
949 const double xRef = uv[0].Coord( iCoo );
950 for ( int i = 1; i < nbUV; ++i )
952 double x = uv[i].Coord( iCoo );
953 double dx = ShapeAnalysis::AdjustByPeriod( x, xRef, period );
954 uv[i].SetCoord( iCoo, x + dx );
959 //=======================================================================
960 //function : GetMiddleUV
961 //purpose : Return middle UV taking in account surface period
962 //=======================================================================
964 gp_XY SMESH_MesherHelper::GetMiddleUV(const Handle(Geom_Surface)& surface,
969 // the proper place of getting basic surface seems to be in ApplyIn2D()
970 // but we put it here to decrease a risk of regressions just before releasing a version
971 // Handle(Geom_Surface) surf = surface;
972 // while ( !surf.IsNull() && surf->IsKind(STANDARD_TYPE(Geom_RectangularTrimmedSurface )))
973 // surf = Handle(Geom_RectangularTrimmedSurface)::DownCast( surf )->BasisSurface();
975 return ApplyIn2D( surface, p1, p2, & AverageUV );
978 //=======================================================================
979 //function : GetCenterUV
980 //purpose : Return UV for the central node of a biquadratic triangle
981 //=======================================================================
983 gp_XY SMESH_MesherHelper::GetCenterUV(const gp_XY& uv1,
989 bool * isBadTria/*=0*/)
992 gp_XY uvAvg = ( uv12 + uv23 + uv31 ) / 3.;
994 if (( badTria = (( uvAvg - uv1 ) * ( uvAvg - uv23 ) > 0 )))
995 uvAvg = ( uv1 + uv23 ) / 2.;
996 else if (( badTria = (( uvAvg - uv2 ) * ( uvAvg - uv31 ) > 0 )))
997 uvAvg = ( uv2 + uv31 ) / 2.;
998 else if (( badTria = (( uvAvg - uv3 ) * ( uvAvg - uv12 ) > 0 )))
999 uvAvg = ( uv3 + uv12 ) / 2.;
1002 *isBadTria = badTria;
1006 //=======================================================================
1007 //function : GetNodeU
1008 //purpose : Return node U on edge
1009 //=======================================================================
1011 double SMESH_MesherHelper::GetNodeU(const TopoDS_Edge& E,
1012 const SMDS_MeshNode* n,
1013 const SMDS_MeshNode* inEdgeNode,
1016 double param = Precision::Infinite();
1018 const SMDS_PositionPtr pos = n->GetPosition();
1019 if ( pos->GetTypeOfPosition()==SMDS_TOP_EDGE )
1021 param = pos->GetParameters()[0];
1023 else if( pos->GetTypeOfPosition() == SMDS_TOP_VERTEX )
1025 if ( inEdgeNode && TopExp::FirstVertex( E ).IsSame( TopExp::LastVertex( E ))) // issue 0020128
1028 BRep_Tool::Range( E, f,l );
1029 double uInEdge = GetNodeU( E, inEdgeNode );
1030 param = ( fabs( uInEdge - f ) < fabs( l - uInEdge )) ? f : l;
1034 SMESHDS_Mesh * meshDS = GetMeshDS();
1035 int vertexID = n->getshapeId();
1036 const TopoDS_Vertex& V = TopoDS::Vertex(meshDS->IndexToShape(vertexID));
1037 param = BRep_Tool::Parameter( V, E );
1041 BRepAdaptor_Curve curve( E );
1042 if ( curve.IsPeriodic() )
1044 double uInEdge = GetNodeU( E, inEdgeNode );
1045 param += ShapeAnalysis::AdjustByPeriod( param, uInEdge, curve.Period() );
1052 double tol = BRep_Tool::Tolerance( E );
1053 double f,l; BRep_Tool::Range( E, f,l );
1054 bool force = ( param < f-tol || param > l+tol );
1055 if ( !force && pos->GetTypeOfPosition()==SMDS_TOP_EDGE )
1056 force = ( GetMeshDS()->ShapeToIndex( E ) != n->getshapeId() );
1058 *check = CheckNodeU( E, n, param, 2*tol, force );
1063 //=======================================================================
1064 //function : CheckNodeU
1065 //purpose : Check and fix node U on an edge
1066 // Return false if U is bad and could not be fixed
1067 //=======================================================================
1069 bool SMESH_MesherHelper::CheckNodeU(const TopoDS_Edge& E,
1070 const SMDS_MeshNode* n,
1074 double distXYZ[4]) const
1076 int shapeID = n->getshapeId();
1078 if (( infinit = Precision::IsInfinite( u )) ||
1081 ( toCheckPosOnShape( shapeID )))
1083 TopLoc_Location loc; double f,l;
1084 Handle(Geom_Curve) curve = BRep_Tool::Curve( E,loc,f,l );
1085 if ( curve.IsNull() ) // degenerated edge
1087 if ( u+tol < f || u-tol > l )
1089 double r = Max( 0.5, 1 - tol*n->GetID()); // to get a unique u on edge
1095 gp_Pnt nodePnt = SMESH_TNodeXYZ( n );
1096 if ( !loc.IsIdentity() ) nodePnt.Transform( loc.Transformation().Inverted() );
1098 double dist = 2*tol;
1101 curvPnt = curve->Value( u );
1102 dist = nodePnt.Distance( curvPnt );
1104 curvPnt.Transform( loc );
1106 distXYZ[1] = curvPnt.X(); distXYZ[2] = curvPnt.Y(); distXYZ[3]=curvPnt.Z();
1111 setPosOnShapeValidity( shapeID, false );
1112 // u incorrect, project the node to the curve
1113 int edgeID = GetMeshDS()->ShapeToIndex( E );
1114 TID2ProjectorOnCurve& i2proj = const_cast< TID2ProjectorOnCurve&>( myEdge2Projector );
1115 TID2ProjectorOnCurve::iterator i_proj =
1116 i2proj.insert( make_pair( edgeID, (GeomAPI_ProjectPointOnCurve*) 0 )).first;
1117 if ( !i_proj->second )
1119 i_proj->second = new GeomAPI_ProjectPointOnCurve();
1120 i_proj->second->Init( curve, f, l );
1122 GeomAPI_ProjectPointOnCurve* projector = i_proj->second;
1123 projector->Perform( nodePnt );
1124 if ( projector->NbPoints() < 1 )
1126 MESSAGE( "SMESH_MesherHelper::CheckNodeU() failed to project" );
1129 Standard_Real U = projector->LowerDistanceParameter();
1131 curvPnt = curve->Value( u );
1132 dist = nodePnt.Distance( curvPnt );
1134 curvPnt.Transform( loc );
1136 distXYZ[1] = curvPnt.X(); distXYZ[2] = curvPnt.Y(); distXYZ[3]=curvPnt.Z();
1140 MESSAGE( "CheckNodeU(), invalid projection; distance " << dist << "; tol " << tol );
1143 // store the fixed U on the edge
1144 if ( myShape.IsSame(E) && shapeID == myShapeID && myFixNodeParameters )
1145 const_cast<SMDS_MeshNode*>(n)->SetPosition
1146 ( SMDS_PositionPtr( new SMDS_EdgePosition( U )));
1148 else if ( fabs( u ) > numeric_limits<double>::min() )
1150 setPosOnShapeValidity( shapeID, true );
1152 if (( u < f-tol || u > l+tol ) && force )
1154 MESSAGE("u < f-tol || u > l+tol ; u " << u << " f " << f << " l " << l);
1155 // node is on vertex but is set on periodic but trimmed edge (issue 0020890)
1158 // do not use IsPeriodic() as Geom_TrimmedCurve::IsPeriodic () returns false
1159 double period = curve->Period();
1160 u = ( u < f ) ? u + period : u - period;
1162 catch (Standard_Failure& exc)
1172 //=======================================================================
1173 //function : GetMediumPos
1174 //purpose : Return index and type of the shape (EDGE or FACE only) to
1175 // set a medium node on
1176 //param : useCurSubShape - if true, returns the shape set via SetSubShape()
1178 //param : expectedSupport - shape type corresponding to element being created,
1179 // e.g TopAbs_EDGE if SMDSAbs_Edge is created
1180 // basing on \a n1 and \a n2
1181 // Calling GetMediumPos() with useCurSubShape=true is OK only for the
1182 // case where the lower dim mesh is already constructed and converted to quadratic,
1183 // else, nodes on EDGEs are assigned to FACE, for example.
1184 //=======================================================================
1186 std::pair<int, TopAbs_ShapeEnum>
1187 SMESH_MesherHelper::GetMediumPos(const SMDS_MeshNode* n1,
1188 const SMDS_MeshNode* n2,
1189 const bool useCurSubShape,
1190 TopAbs_ShapeEnum expectedSupport)
1192 if ( useCurSubShape && !myShape.IsNull() )
1193 return std::make_pair( myShapeID, myShape.ShapeType() );
1195 TopAbs_ShapeEnum shapeType = TopAbs_SHAPE;
1199 if (( myShapeID == n1->getshapeId() || myShapeID == n2->getshapeId() ) && myShapeID > 0 )
1201 shapeType = myShape.ShapeType();
1202 shapeID = myShapeID;
1204 else if ( n1->getshapeId() == n2->getshapeId() )
1206 shapeID = n2->getshapeId();
1207 shape = GetSubShapeByNode( n1, GetMeshDS() );
1209 else // 2 different shapes
1211 const SMDS_TypeOfPosition Pos1 = n1->GetPosition()->GetTypeOfPosition();
1212 const SMDS_TypeOfPosition Pos2 = n2->GetPosition()->GetTypeOfPosition();
1214 if ( Pos1 == SMDS_TOP_3DSPACE || Pos2 == SMDS_TOP_3DSPACE )
1218 else if ( Pos1 == SMDS_TOP_FACE || Pos2 == SMDS_TOP_FACE )
1221 if ( Pos1 != SMDS_TOP_FACE || Pos2 != SMDS_TOP_FACE ) // not 2 FACEs
1223 if ( Pos1 != SMDS_TOP_FACE ) std::swap( n1,n2 );
1224 TopoDS_Shape F = GetSubShapeByNode( n1, GetMeshDS() );
1225 TopoDS_Shape S = GetSubShapeByNode( n2, GetMeshDS() );
1226 if ( IsSubShape( S, F ))
1228 shapeType = TopAbs_FACE;
1229 shapeID = n1->getshapeId();
1233 else if ( Pos1 == SMDS_TOP_EDGE && Pos2 == SMDS_TOP_EDGE )
1235 TopoDS_Shape E1 = GetSubShapeByNode( n1, GetMeshDS() );
1236 TopoDS_Shape E2 = GetSubShapeByNode( n2, GetMeshDS() );
1237 shape = GetCommonAncestor( E1, E2, *myMesh, TopAbs_FACE );
1239 else if ( Pos1 == SMDS_TOP_VERTEX && Pos2 == SMDS_TOP_VERTEX )
1241 TopoDS_Shape V1 = GetSubShapeByNode( n1, GetMeshDS() );
1242 TopoDS_Shape V2 = GetSubShapeByNode( n2, GetMeshDS() );
1243 shape = GetCommonAncestor( V1, V2, *myMesh, TopAbs_EDGE );
1244 if ( shape.IsNull() ) shape = GetCommonAncestor( V1, V2, *myMesh, TopAbs_FACE );
1246 else // on VERTEX and EDGE
1248 if ( Pos1 != SMDS_TOP_VERTEX ) std::swap( n1,n2 );
1249 TopoDS_Shape V = GetSubShapeByNode( n1, GetMeshDS() );
1250 TopoDS_Shape E = GetSubShapeByNode( n2, GetMeshDS() );
1251 if ( IsSubShape( V, E ))
1254 shape = GetCommonAncestor( V, E, *myMesh, TopAbs_FACE );
1258 if ( !shape.IsNull() )
1261 shapeID = GetMeshDS()->ShapeToIndex( shape );
1262 shapeType = shape.ShapeType(); // EDGE or FACE
1264 if ( expectedSupport < shapeType &&
1265 expectedSupport != TopAbs_SHAPE &&
1266 !myShape.IsNull() &&
1267 myShape.ShapeType() == expectedSupport )
1269 // e.g. a side of triangle connects nodes on the same EDGE but does not
1270 // lie on this EDGE (an arc with a coarse mesh)
1271 // => shapeType == TopAbs_EDGE, expectedSupport == TopAbs_FACE;
1272 // hope that myShape is a right shape, return it if the found shape
1273 // has converted elements of corresponding dim (segments in our example)
1274 int nbConvertedElems = 0;
1275 SMDSAbs_ElementType type = ( shapeType == TopAbs_FACE ? SMDSAbs_Face : SMDSAbs_Edge );
1276 for ( int iN = 0; iN < 2; ++iN )
1278 const SMDS_MeshNode* n = iN ? n2 : n1;
1279 SMDS_ElemIteratorPtr it = n->GetInverseElementIterator( type );
1280 while ( it->more() )
1282 const SMDS_MeshElement* elem = it->next();
1283 if ( elem->getshapeId() == shapeID &&
1284 elem->IsQuadratic() )
1291 if ( nbConvertedElems == 2 )
1293 shapeType = myShape.ShapeType();
1294 shapeID = myShapeID;
1298 return make_pair( shapeID, shapeType );
1301 //=======================================================================
1302 //function : GetCentralNode
1303 //purpose : Return existing or create a new central node for a quardilateral
1304 // quadratic face given its 8 nodes.
1305 //@param : force3d - true means node creation in between the given nodes,
1306 // else node position is found on a geometrical face if any.
1307 //=======================================================================
1309 const SMDS_MeshNode* SMESH_MesherHelper::GetCentralNode(const SMDS_MeshNode* n1,
1310 const SMDS_MeshNode* n2,
1311 const SMDS_MeshNode* n3,
1312 const SMDS_MeshNode* n4,
1313 const SMDS_MeshNode* n12,
1314 const SMDS_MeshNode* n23,
1315 const SMDS_MeshNode* n34,
1316 const SMDS_MeshNode* n41,
1319 SMDS_MeshNode *centralNode = 0; // central node to return
1321 // Find an existing central node
1323 TBiQuad keyOfMap(n1,n2,n3,n4);
1324 std::map<TBiQuad, const SMDS_MeshNode* >::iterator itMapCentralNode;
1325 itMapCentralNode = myMapWithCentralNode.find( keyOfMap );
1326 if ( itMapCentralNode != myMapWithCentralNode.end() )
1328 return (*itMapCentralNode).second;
1331 // Get type of shape for the new central node
1333 TopAbs_ShapeEnum shapeType = TopAbs_SHAPE;
1337 TopTools_ListIteratorOfListOfShape it;
1339 std::map< int, int > faceId2nbNodes;
1340 std::map< int, int > ::iterator itMapWithIdFace;
1342 SMESHDS_Mesh* meshDS = GetMeshDS();
1344 // check if a face lies on a FACE, i.e. its all corner nodes lie either on the FACE or
1345 // on sub-shapes of the FACE
1346 if ( GetMesh()->HasShapeToMesh() )
1348 const SMDS_MeshNode* nodes[] = { n1, n2, n3, n4 };
1349 for(int i = 0; i < 4; i++)
1351 shape = GetSubShapeByNode( nodes[i], meshDS );
1352 if ( shape.IsNull() ) break;
1353 if ( shape.ShapeType() == TopAbs_SOLID )
1355 solidID = nodes[i]->getshapeId();
1356 shapeType = TopAbs_SOLID;
1359 if ( shape.ShapeType() == TopAbs_FACE )
1361 faceID = nodes[i]->getshapeId();
1362 itMapWithIdFace = faceId2nbNodes.insert( std::make_pair( faceID, 0 ) ).first;
1363 itMapWithIdFace->second++;
1367 PShapeIteratorPtr it = GetAncestors( shape, *GetMesh(), TopAbs_FACE );
1368 while ( const TopoDS_Shape* face = it->next() )
1370 faceID = meshDS->ShapeToIndex( *face );
1371 itMapWithIdFace = faceId2nbNodes.insert( std::make_pair( faceID, 0 )).first;
1372 itMapWithIdFace->second++;
1377 if ( solidID < 1 && !faceId2nbNodes.empty() ) // SOLID not found
1379 // find ID of the FACE the four corner nodes belong to
1380 itMapWithIdFace = faceId2nbNodes.find( myShapeID ); // IPAL52698
1381 if ( itMapWithIdFace != faceId2nbNodes.end() &&
1382 itMapWithIdFace->second == 4 )
1384 shapeType = TopAbs_FACE;
1389 itMapWithIdFace = faceId2nbNodes.begin();
1390 for ( ; itMapWithIdFace != faceId2nbNodes.end(); ++itMapWithIdFace)
1392 if ( itMapWithIdFace->second == 4 )
1394 shapeType = TopAbs_FACE;
1395 faceID = (*itMapWithIdFace).first;
1403 if ( shapeType == TopAbs_FACE )
1405 F = TopoDS::Face( meshDS->IndexToShape( faceID ));
1412 bool toCheck = true;
1413 if ( !F.IsNull() && !force3d )
1415 Handle(ShapeAnalysis_Surface) surface = GetSurface( F );
1416 if ( HasDegeneratedEdges() || surface->HasSingularities( 1e-7 ))
1418 gp_Pnt center = calcTFI (0.5, 0.5, // IPAL0052863
1419 SMESH_TNodeXYZ(n1), SMESH_TNodeXYZ(n2),
1420 SMESH_TNodeXYZ(n3), SMESH_TNodeXYZ(n4),
1421 SMESH_TNodeXYZ(n12), SMESH_TNodeXYZ(n23),
1422 SMESH_TNodeXYZ(n34), SMESH_TNodeXYZ(n41));
1423 gp_Pnt2d uv12 = GetNodeUV( F, n12, n3, &toCheck );
1424 uvAvg = surface->NextValueOfUV( uv12, center, BRep_Tool::Tolerance( F )).XY();
1429 GetNodeUV( F,n1, n3, &toCheck ),
1430 GetNodeUV( F,n2, n4, &toCheck ),
1431 GetNodeUV( F,n3, n1, &toCheck ),
1432 GetNodeUV( F,n4, n2, &toCheck ),
1433 GetNodeUV( F,n12, n3 ),
1434 GetNodeUV( F,n23, n4 ),
1435 GetNodeUV( F,n34, n2 ),
1436 GetNodeUV( F,n41, n2 )
1438 AdjustByPeriod( F, uv, 8 ); // put uv[] within a period (IPAL52698)
1440 uvAvg = calcTFI (0.5, 0.5, uv[0],uv[1],uv[2],uv[3], uv[4],uv[5],uv[6],uv[7] );
1442 P = surface->Value( uvAvg );
1443 centralNode = meshDS->AddNode( P.X(), P.Y(), P.Z() );
1444 // if ( mySetElemOnShape ) node is not elem!
1445 meshDS->SetNodeOnFace( centralNode, faceID, uvAvg.X(), uvAvg.Y() );
1447 else // ( force3d || F.IsNull() )
1449 P = calcTFI (0.5, 0.5,
1450 SMESH_TNodeXYZ(n1), SMESH_TNodeXYZ(n2),
1451 SMESH_TNodeXYZ(n3), SMESH_TNodeXYZ(n4),
1452 SMESH_TNodeXYZ(n12), SMESH_TNodeXYZ(n23),
1453 SMESH_TNodeXYZ(n34), SMESH_TNodeXYZ(n41));
1454 centralNode = meshDS->AddNode( P.X(), P.Y(), P.Z() );
1456 if ( !F.IsNull() ) // force3d
1458 uvAvg = (GetNodeUV(F,n1,n3,&toCheck) +
1459 GetNodeUV(F,n2,n4,&toCheck) +
1460 GetNodeUV(F,n3,n1,&toCheck) +
1461 GetNodeUV(F,n4,n2,&toCheck)) / 4;
1462 //CheckNodeUV( F, centralNode, uvAvg, 2*BRep_Tool::Tolerance( F ), /*force=*/true);
1463 meshDS->SetNodeOnFace( centralNode, faceID, uvAvg.X(), uvAvg.Y() );
1465 else if ( solidID > 0 )
1467 meshDS->SetNodeInVolume( centralNode, solidID );
1469 else if ( myShapeID > 0 && mySetElemOnShape )
1471 meshDS->SetMeshElementOnShape( centralNode, myShapeID );
1474 myMapWithCentralNode.insert( std::make_pair( keyOfMap, centralNode ) );
1478 //=======================================================================
1479 //function : GetCentralNode
1480 //purpose : Return existing or create a new central node for a
1481 // quadratic triangle given its 6 nodes.
1482 //@param : force3d - true means node creation in between the given nodes,
1483 // else node position is found on a geometrical face if any.
1484 //=======================================================================
1486 const SMDS_MeshNode* SMESH_MesherHelper::GetCentralNode(const SMDS_MeshNode* n1,
1487 const SMDS_MeshNode* n2,
1488 const SMDS_MeshNode* n3,
1489 const SMDS_MeshNode* n12,
1490 const SMDS_MeshNode* n23,
1491 const SMDS_MeshNode* n31,
1494 SMDS_MeshNode *centralNode = 0; // central node to return
1496 // Find an existing central node
1498 TBiQuad keyOfMap(n1,n2,n3);
1499 std::map<TBiQuad, const SMDS_MeshNode* >::iterator itMapCentralNode;
1500 itMapCentralNode = myMapWithCentralNode.find( keyOfMap );
1501 if ( itMapCentralNode != myMapWithCentralNode.end() )
1503 return (*itMapCentralNode).second;
1506 // Get type of shape for the new central node
1508 TopAbs_ShapeEnum shapeType = TopAbs_SHAPE;
1512 TopTools_ListIteratorOfListOfShape it;
1514 std::map< int, int > faceId2nbNodes;
1515 std::map< int, int > ::iterator itMapWithIdFace;
1517 SMESHDS_Mesh* meshDS = GetMeshDS();
1519 // check if a face lies on a FACE, i.e. its all corner nodes lie either on the FACE or
1520 // on sub-shapes of the FACE
1521 if ( GetMesh()->HasShapeToMesh() )
1523 const SMDS_MeshNode* nodes[] = { n1, n2, n3 };
1524 for(int i = 0; i < 3; i++)
1526 shape = GetSubShapeByNode( nodes[i], meshDS );
1527 if ( shape.IsNull() ) break;
1528 if ( shape.ShapeType() == TopAbs_SOLID )
1530 solidID = nodes[i]->getshapeId();
1531 shapeType = TopAbs_SOLID;
1534 if ( shape.ShapeType() == TopAbs_FACE )
1536 faceID = nodes[i]->getshapeId();
1537 itMapWithIdFace = faceId2nbNodes.insert( std::make_pair( faceID, 0 ) ).first;
1538 itMapWithIdFace->second++;
1542 PShapeIteratorPtr it = GetAncestors(shape, *GetMesh(), TopAbs_FACE );
1543 while ( const TopoDS_Shape* face = it->next() )
1545 faceID = meshDS->ShapeToIndex( *face );
1546 itMapWithIdFace = faceId2nbNodes.insert( std::make_pair( faceID, 0 ) ).first;
1547 itMapWithIdFace->second++;
1552 if ( solidID < 1 && !faceId2nbNodes.empty() ) // SOLID not found
1554 // find ID of the FACE the four corner nodes belong to
1555 itMapWithIdFace = faceId2nbNodes.find( myShapeID ); // IPAL52698
1556 if ( itMapWithIdFace != faceId2nbNodes.end() &&
1557 itMapWithIdFace->second == 4 )
1559 shapeType = TopAbs_FACE;
1564 itMapWithIdFace = faceId2nbNodes.begin();
1565 for ( ; itMapWithIdFace != faceId2nbNodes.end(); ++itMapWithIdFace)
1567 if ( itMapWithIdFace->second == 3 )
1569 shapeType = TopAbs_FACE;
1570 faceID = (*itMapWithIdFace).first;
1580 if ( shapeType == TopAbs_FACE )
1582 F = TopoDS::Face( meshDS->IndexToShape( faceID ));
1583 bool checkOK = true, badTria = false;
1585 GetNodeUV( F, n1, n23, &checkOK ),
1586 GetNodeUV( F, n2, n31, &checkOK ),
1587 GetNodeUV( F, n3, n12, &checkOK ),
1588 GetNodeUV( F, n12, n3, &checkOK ),
1589 GetNodeUV( F, n23, n1, &checkOK ),
1590 GetNodeUV( F, n31, n2, &checkOK )
1592 AdjustByPeriod( F, uv, 6 ); // put uv[] within a period (IPAL52698)
1594 uvAvg = GetCenterUV( uv[0],uv[1],uv[2], uv[3],uv[4],uv[5], &badTria );
1596 if ( badTria || !checkOK )
1600 // Create a central node
1603 if ( !F.IsNull() && !force3d )
1605 TopLoc_Location loc;
1606 Handle( Geom_Surface ) S = BRep_Tool::Surface( F, loc );
1607 P = S->Value( uvAvg.X(), uvAvg.Y() ).Transformed( loc );
1608 centralNode = meshDS->AddNode( P.X(), P.Y(), P.Z() );
1609 // if ( mySetElemOnShape ) node is not elem!
1610 meshDS->SetNodeOnFace( centralNode, faceID, uvAvg.X(), uvAvg.Y() );
1612 else // ( force3d || F.IsNull() )
1614 P = ( SMESH_TNodeXYZ( n12 ) +
1615 SMESH_TNodeXYZ( n23 ) +
1616 SMESH_TNodeXYZ( n31 ) ) / 3;
1617 centralNode = meshDS->AddNode( P.X(), P.Y(), P.Z() );
1619 if ( !F.IsNull() ) // force3d
1621 meshDS->SetNodeOnFace( centralNode, faceID, uvAvg.X(), uvAvg.Y() );
1623 else if ( solidID > 0 )
1625 meshDS->SetNodeInVolume( centralNode, solidID );
1627 else if ( myShapeID > 0 && mySetElemOnShape )
1629 meshDS->SetMeshElementOnShape( centralNode, myShapeID );
1632 myMapWithCentralNode.insert( std::make_pair( keyOfMap, centralNode ) );
1636 //=======================================================================
1637 //function : GetMediumNode
1638 //purpose : Return existing or create a new medium node between given ones
1639 //=======================================================================
1641 const SMDS_MeshNode* SMESH_MesherHelper::GetMediumNode(const SMDS_MeshNode* n1,
1642 const SMDS_MeshNode* n2,
1644 TopAbs_ShapeEnum expectedSupport)
1646 // Find existing node
1648 SMESH_TLink link(n1,n2);
1649 ItTLinkNode itLN = myTLinkNodeMap.find( link );
1650 if ( itLN != myTLinkNodeMap.end() ) {
1651 return (*itLN).second;
1654 // Create medium node
1657 SMESHDS_Mesh* meshDS = GetMeshDS();
1659 if ( IsSeamShape( n1->getshapeId() ))
1660 // to get a correct UV of a node on seam, the second node must have checked UV
1661 std::swap( n1, n2 );
1663 // get type of shape for the new medium node
1664 int faceID = -1, edgeID = -1;
1665 TopoDS_Edge E; double u [2] = {0.,0.};
1666 TopoDS_Face F; gp_XY uv[2];
1667 bool uvOK[2] = { true, true };
1668 const bool useCurSubShape = ( !myShape.IsNull() && myShape.ShapeType() == TopAbs_EDGE );
1670 pair<int, TopAbs_ShapeEnum> pos = GetMediumPos( n1, n2, useCurSubShape, expectedSupport );
1672 // get positions of the given nodes on shapes
1673 if ( pos.second == TopAbs_FACE )
1675 F = TopoDS::Face( meshDS->IndexToShape( faceID = pos.first ));
1676 uv[0] = GetNodeUV(F,n1,n2, force3d ? 0 : &uvOK[0]);
1677 uv[1] = GetNodeUV(F,n2,n1, force3d ? 0 : &uvOK[1]);
1679 else if ( pos.second == TopAbs_EDGE )
1681 const SMDS_PositionPtr Pos1 = n1->GetPosition();
1682 const SMDS_PositionPtr Pos2 = n2->GetPosition();
1683 if ( Pos1->GetTypeOfPosition()==SMDS_TOP_EDGE &&
1684 Pos2->GetTypeOfPosition()==SMDS_TOP_EDGE &&
1685 n1->getshapeId() != n2->getshapeId() )
1688 return getMediumNodeOnComposedWire(n1,n2,force3d);
1690 E = TopoDS::Edge(meshDS->IndexToShape( edgeID = pos.first ));
1692 u[0] = GetNodeU(E,n1,n2, force3d ? 0 : &uvOK[0]);
1693 u[1] = GetNodeU(E,n2,n1, force3d ? 0 : &uvOK[1]);
1695 catch ( Standard_Failure& f )
1697 // issue 22502 / a node is on VERTEX not belonging to E
1698 // issue 22568 / both nodes are on non-connected VERTEXes
1699 return getMediumNodeOnComposedWire(n1,n2,force3d);
1703 if ( !force3d & uvOK[0] && uvOK[1] )
1705 // we try to create medium node using UV parameters of
1706 // nodes, else - medium between corresponding 3d points
1709 if ( IsDegenShape( n1->getshapeId() )) {
1710 if ( myParIndex & U_periodic ) uv[0].SetCoord( 1, uv[1].Coord( 1 ));
1711 else uv[0].SetCoord( 2, uv[1].Coord( 2 ));
1713 else if ( IsDegenShape( n2->getshapeId() )) {
1714 if ( myParIndex & U_periodic ) uv[1].SetCoord( 1, uv[0].Coord( 1 ));
1715 else uv[1].SetCoord( 2, uv[0].Coord( 2 ));
1717 TopLoc_Location loc;
1718 Handle(Geom_Surface) S = BRep_Tool::Surface(F,loc);
1719 gp_XY UV = GetMiddleUV( S, uv[0], uv[1] );
1720 gp_Pnt P = S->Value( UV.X(), UV.Y() ).Transformed(loc);
1722 SMESH_TNodeXYZ p1( n1 ), p2( n2 );
1723 gp_Pnt pMid = 0.5 * ( p1 + p2 );
1724 double distMid = pMid.SquareDistance( P );
1725 double dist12 = ( p1 - p2 ).SquareModulus();
1726 Handle(ShapeAnalysis_Surface) surfInfo = GetSurface( F );
1727 if ( distMid > dist12 ||
1728 HasDegeneratedEdges() ||
1729 surfInfo->HasSingularities( 1e-7 ) )
1731 // IPAL52850 (degen VERTEX not at singularity)
1732 // project middle point to a surface
1735 uvMid = surfInfo->NextValueOfUV( uv[0], pMid, BRep_Tool::Tolerance( F ));
1737 uvMid = surfInfo->ValueOfUV( pMid, getFaceMaxTol( F ));
1738 if ( surfInfo->Gap() * surfInfo->Gap() < distMid )
1739 P = surfInfo->Value( uvMid );
1741 n12 = meshDS->AddNode(P.X(), P.Y(), P.Z());
1742 // if ( mySetElemOnShape ) node is not elem!
1743 meshDS->SetNodeOnFace(n12, faceID, UV.X(), UV.Y());
1744 myTLinkNodeMap.insert(make_pair(link,n12));
1747 else if ( !E.IsNull() )
1750 Handle(Geom_Curve) C = BRep_Tool::Curve(E, f, l);
1753 Standard_Boolean isPeriodic = C->IsPeriodic();
1756 Standard_Real Period = C->Period();
1757 Standard_Real p = u[1]+ShapeAnalysis::AdjustByPeriod(u[1],u[0],Period);
1758 Standard_Real pmid = (u[0]+p)/2.;
1759 U = pmid+ShapeAnalysis::AdjustToPeriod(pmid,C->FirstParameter(),C->LastParameter());
1764 gp_Pnt P = C->Value( U );
1765 n12 = meshDS->AddNode(P.X(), P.Y(), P.Z());
1766 //if ( mySetElemOnShape ) node is not elem!
1767 meshDS->SetNodeOnEdge(n12, edgeID, U);
1768 myTLinkNodeMap.insert(make_pair(link,n12));
1775 double x = ( n1->X() + n2->X() )/2.;
1776 double y = ( n1->Y() + n2->Y() )/2.;
1777 double z = ( n1->Z() + n2->Z() )/2.;
1778 n12 = meshDS->AddNode(x,y,z);
1780 //if ( mySetElemOnShape ) node is not elem!
1784 gp_XY UV = ( uv[0] + uv[1] ) / 2.;
1785 CheckNodeUV( F, n12, UV, 2 * BRep_Tool::Tolerance( F ), /*force=*/true);
1786 meshDS->SetNodeOnFace(n12, faceID, UV.X(), UV.Y() );
1788 else if ( !E.IsNull() )
1790 double U = ( u[0] + u[1] ) / 2.;
1791 CheckNodeU( E, n12, U, 2 * BRep_Tool::Tolerance( E ), /*force=*/true);
1792 meshDS->SetNodeOnEdge(n12, edgeID, U);
1794 else if ( myShapeID > 0 && mySetElemOnShape )
1796 meshDS->SetMeshElementOnShape(n12, myShapeID);
1800 myTLinkNodeMap.insert( make_pair( link, n12 ));
1804 //================================================================================
1806 * \brief Makes a medium node if nodes reside different edges
1808 //================================================================================
1810 const SMDS_MeshNode* SMESH_MesherHelper::getMediumNodeOnComposedWire(const SMDS_MeshNode* n1,
1811 const SMDS_MeshNode* n2,
1814 SMESH_TNodeXYZ p1( n1 ), p2( n2 );
1815 gp_Pnt middle = 0.5 * p1 + 0.5 * p2;
1816 SMDS_MeshNode* n12 = AddNode( middle.X(), middle.Y(), middle.Z() );
1818 // To find position on edge and 3D position for n12,
1819 // project <middle> to 2 edges and select projection most close to <middle>
1821 TopoDS_Edge bestEdge;
1822 double u = 0, distMiddleProj = Precision::Infinite(), distXYZ[4], f,l;
1824 // get shapes under the nodes
1825 TopoDS_Shape shape[2];
1827 for ( int is2nd = 0; is2nd < 2; ++is2nd )
1829 const SMDS_MeshNode* n = is2nd ? n2 : n1;
1830 TopoDS_Shape S = GetSubShapeByNode( n, GetMeshDS() );
1832 shape[ nbShapes++ ] = S;
1835 vector< TopoDS_Shape > edges;
1836 for ( int iS = 0; iS < nbShapes; ++iS )
1838 switch ( shape[iS].ShapeType() ) {
1841 edges.push_back( shape[iS] );
1847 if ( nbShapes == 2 && iS==0 && shape[1-iS].ShapeType() == TopAbs_VERTEX )
1848 edge = GetCommonAncestor( shape[iS], shape[1-iS], *myMesh, TopAbs_EDGE );
1850 if ( edge.IsNull() )
1852 PShapeIteratorPtr eIt = GetAncestors( shape[iS], *myMesh, TopAbs_EDGE );
1853 while( const TopoDS_Shape* e = eIt->next() )
1854 edges.push_back( *e );
1860 if ( nbShapes == 1 || shape[1-iS].ShapeType() < TopAbs_EDGE )
1861 for ( TopExp_Explorer e( shape[iS], TopAbs_EDGE ); e.More(); e.Next() )
1862 edges.push_back( e.Current() );
1869 // project to get U of projection and distance from middle to projection
1870 for ( size_t iE = 0; iE < edges.size(); ++iE )
1872 const TopoDS_Edge& edge = TopoDS::Edge( edges[ iE ]);
1873 distXYZ[0] = distMiddleProj;
1875 CheckNodeU( edge, n12, testU, 2 * BRep_Tool::Tolerance(edge), /*force=*/true, distXYZ );
1876 if ( distXYZ[0] < distMiddleProj )
1878 distMiddleProj = distXYZ[0];
1884 // // both projections failed; set n12 on the edge of n1 with U of a common vertex
1885 // TopoDS_Vertex vCommon;
1886 // if ( TopExp::CommonVertex( edges[0], edges[1], vCommon ))
1887 // u = BRep_Tool::Parameter( vCommon, edges[0] );
1890 // double f,l, u0 = GetNodeU( edges[0], n1 );
1891 // BRep_Tool::Range( edges[0],f,l );
1892 // u = ( fabs(u0-f) < fabs(u0-l) ) ? f : l;
1895 // distMiddleProj = 0;
1898 if ( !bestEdge.IsNull() )
1900 // move n12 to position of a successful projection
1901 //double tol = BRep_Tool::Tolerance(edges[ iOkEdge ]);
1902 if ( !force3d /*&& distMiddleProj > 2*tol*/ )
1904 TopLoc_Location loc;
1905 Handle(Geom_Curve) curve = BRep_Tool::Curve( bestEdge,loc,f,l );
1906 gp_Pnt p = curve->Value( u ).Transformed( loc );
1907 GetMeshDS()->MoveNode( n12, p.X(), p.Y(), p.Z() );
1909 //if ( mySetElemOnShape ) node is not elem!
1911 int edgeID = GetMeshDS()->ShapeToIndex( bestEdge );
1912 if ( edgeID != n12->getshapeId() )
1913 GetMeshDS()->UnSetNodeOnShape( n12 );
1914 GetMeshDS()->SetNodeOnEdge(n12, edgeID, u);
1917 myTLinkNodeMap.insert( make_pair( SMESH_TLink(n1,n2), n12 ));
1922 //=======================================================================
1923 //function : AddNode
1924 //purpose : Creates a node
1925 //=======================================================================
1927 SMDS_MeshNode* SMESH_MesherHelper::AddNode(double x, double y, double z, int ID,
1930 SMESHDS_Mesh * meshDS = GetMeshDS();
1931 SMDS_MeshNode* node = 0;
1933 node = meshDS->AddNodeWithID( x, y, z, ID );
1935 node = meshDS->AddNode( x, y, z );
1936 if ( mySetElemOnShape && myShapeID > 0 ) { // node is not elem ?
1937 switch ( myShape.ShapeType() ) {
1938 case TopAbs_SOLID: meshDS->SetNodeInVolume( node, myShapeID); break;
1939 case TopAbs_SHELL: meshDS->SetNodeInVolume( node, myShapeID); break;
1940 case TopAbs_FACE: meshDS->SetNodeOnFace( node, myShapeID, u, v); break;
1941 case TopAbs_EDGE: meshDS->SetNodeOnEdge( node, myShapeID, u); break;
1942 case TopAbs_VERTEX: meshDS->SetNodeOnVertex( node, myShapeID); break;
1949 //=======================================================================
1950 //function : AddEdge
1951 //purpose : Creates quadratic or linear edge
1952 //=======================================================================
1954 SMDS_MeshEdge* SMESH_MesherHelper::AddEdge(const SMDS_MeshNode* n1,
1955 const SMDS_MeshNode* n2,
1959 SMESHDS_Mesh * meshDS = GetMeshDS();
1961 SMDS_MeshEdge* edge = 0;
1962 if (myCreateQuadratic) {
1963 const SMDS_MeshNode* n12 = GetMediumNode(n1,n2,force3d);
1965 edge = meshDS->AddEdgeWithID(n1, n2, n12, id);
1967 edge = meshDS->AddEdge(n1, n2, n12);
1971 edge = meshDS->AddEdgeWithID(n1, n2, id);
1973 edge = meshDS->AddEdge(n1, n2);
1976 if ( mySetElemOnShape && myShapeID > 0 )
1977 meshDS->SetMeshElementOnShape( edge, myShapeID );
1982 //=======================================================================
1983 //function : AddFace
1984 //purpose : Creates quadratic or linear triangle
1985 //=======================================================================
1987 SMDS_MeshFace* SMESH_MesherHelper::AddFace(const SMDS_MeshNode* n1,
1988 const SMDS_MeshNode* n2,
1989 const SMDS_MeshNode* n3,
1993 SMESHDS_Mesh * meshDS = GetMeshDS();
1994 SMDS_MeshFace* elem = 0;
1996 if( n1==n2 || n2==n3 || n3==n1 )
1999 if(!myCreateQuadratic) {
2001 elem = meshDS->AddFaceWithID(n1, n2, n3, id);
2003 elem = meshDS->AddFace(n1, n2, n3);
2006 const SMDS_MeshNode* n12 = GetMediumNode( n1, n2, force3d, TopAbs_FACE );
2007 const SMDS_MeshNode* n23 = GetMediumNode( n2, n3, force3d, TopAbs_FACE );
2008 const SMDS_MeshNode* n31 = GetMediumNode( n3, n1, force3d, TopAbs_FACE );
2009 if(myCreateBiQuadratic)
2011 const SMDS_MeshNode* nCenter = GetCentralNode(n1, n2, n3, n12, n23, n31, force3d);
2013 elem = meshDS->AddFaceWithID(n1, n2, n3, n12, n23, n31, nCenter, id);
2015 elem = meshDS->AddFace(n1, n2, n3, n12, n23, n31, nCenter);
2020 elem = meshDS->AddFaceWithID(n1, n2, n3, n12, n23, n31, id);
2022 elem = meshDS->AddFace(n1, n2, n3, n12, n23, n31);
2025 if ( mySetElemOnShape && myShapeID > 0 )
2026 meshDS->SetMeshElementOnShape( elem, myShapeID );
2031 //=======================================================================
2032 //function : AddFace
2033 //purpose : Creates bi-quadratic, quadratic or linear quadrangle
2034 //=======================================================================
2036 SMDS_MeshFace* SMESH_MesherHelper::AddFace(const SMDS_MeshNode* n1,
2037 const SMDS_MeshNode* n2,
2038 const SMDS_MeshNode* n3,
2039 const SMDS_MeshNode* n4,
2043 SMESHDS_Mesh * meshDS = GetMeshDS();
2044 SMDS_MeshFace* elem = 0;
2047 return AddFace(n1,n3,n4,id,force3d);
2050 return AddFace(n1,n2,n4,id,force3d);
2053 return AddFace(n1,n2,n3,id,force3d);
2056 return AddFace(n1,n2,n4,id,force3d);
2059 return AddFace(n1,n2,n3,id,force3d);
2062 return AddFace(n1,n2,n3,id,force3d);
2065 if(!myCreateQuadratic) {
2067 elem = meshDS->AddFaceWithID(n1, n2, n3, n4, id);
2069 elem = meshDS->AddFace(n1, n2, n3, n4);
2072 const SMDS_MeshNode* n12 = GetMediumNode( n1, n2, force3d, TopAbs_FACE );
2073 const SMDS_MeshNode* n23 = GetMediumNode( n2, n3, force3d, TopAbs_FACE );
2074 const SMDS_MeshNode* n34 = GetMediumNode( n3, n4, force3d, TopAbs_FACE );
2075 const SMDS_MeshNode* n41 = GetMediumNode( n4, n1, force3d, TopAbs_FACE );
2076 if(myCreateBiQuadratic)
2078 const SMDS_MeshNode* nCenter = GetCentralNode(n1, n2, n3, n4, n12, n23, n34, n41, force3d);
2080 elem = meshDS->AddFaceWithID(n1, n2, n3, n4, n12, n23, n34, n41, nCenter, id);
2082 elem = meshDS->AddFace(n1, n2, n3, n4, n12, n23, n34, n41, nCenter);
2087 elem = meshDS->AddFaceWithID(n1, n2, n3, n4, n12, n23, n34, n41, id);
2089 elem = meshDS->AddFace(n1, n2, n3, n4, n12, n23, n34, n41);
2092 if ( mySetElemOnShape && myShapeID > 0 )
2093 meshDS->SetMeshElementOnShape( elem, myShapeID );
2098 //=======================================================================
2099 //function : AddPolygonalFace
2100 //purpose : Creates polygon, with additional nodes in quadratic mesh
2101 //=======================================================================
2103 SMDS_MeshFace* SMESH_MesherHelper::AddPolygonalFace (const vector<const SMDS_MeshNode*>& nodes,
2107 SMESHDS_Mesh * meshDS = GetMeshDS();
2108 SMDS_MeshFace* elem = 0;
2110 if(!myCreateQuadratic)
2113 elem = meshDS->AddPolygonalFaceWithID(nodes, id);
2115 elem = meshDS->AddPolygonalFace(nodes);
2119 vector<const SMDS_MeshNode*> newNodes( nodes.size() * 2 );
2121 for ( size_t i = 0; i < nodes.size(); ++i )
2123 const SMDS_MeshNode* n1 = nodes[i];
2124 const SMDS_MeshNode* n2 = nodes[(i+1)%nodes.size()];
2125 const SMDS_MeshNode* n12 = GetMediumNode( n1, n2, force3d, TopAbs_FACE );
2126 newNodes.push_back( n12 );
2129 elem = meshDS->AddQuadPolygonalFaceWithID(newNodes, id);
2131 elem = meshDS->AddQuadPolygonalFace(newNodes);
2133 if ( mySetElemOnShape && myShapeID > 0 )
2134 meshDS->SetMeshElementOnShape( elem, myShapeID );
2139 //=======================================================================
2140 //function : AddVolume
2141 //purpose : Creates quadratic or linear prism
2142 //=======================================================================
2144 SMDS_MeshVolume* SMESH_MesherHelper::AddVolume(const SMDS_MeshNode* n1,
2145 const SMDS_MeshNode* n2,
2146 const SMDS_MeshNode* n3,
2147 const SMDS_MeshNode* n4,
2148 const SMDS_MeshNode* n5,
2149 const SMDS_MeshNode* n6,
2153 SMESHDS_Mesh * meshDS = GetMeshDS();
2154 SMDS_MeshVolume* elem = 0;
2155 if(!myCreateQuadratic) {
2157 elem = meshDS->AddVolumeWithID(n1, n2, n3, n4, n5, n6, id);
2159 elem = meshDS->AddVolume(n1, n2, n3, n4, n5, n6);
2162 const SMDS_MeshNode* n12 = GetMediumNode( n1, n2, force3d, TopAbs_SOLID );
2163 const SMDS_MeshNode* n23 = GetMediumNode( n2, n3, force3d, TopAbs_SOLID );
2164 const SMDS_MeshNode* n31 = GetMediumNode( n3, n1, force3d, TopAbs_SOLID );
2166 const SMDS_MeshNode* n45 = GetMediumNode( n4, n5, force3d, TopAbs_SOLID );
2167 const SMDS_MeshNode* n56 = GetMediumNode( n5, n6, force3d, TopAbs_SOLID );
2168 const SMDS_MeshNode* n64 = GetMediumNode( n6, n4, force3d, TopAbs_SOLID );
2170 const SMDS_MeshNode* n14 = GetMediumNode( n1, n4, force3d, TopAbs_SOLID );
2171 const SMDS_MeshNode* n25 = GetMediumNode( n2, n5, force3d, TopAbs_SOLID );
2172 const SMDS_MeshNode* n36 = GetMediumNode( n3, n6, force3d, TopAbs_SOLID );
2173 if ( myCreateBiQuadratic )
2175 const SMDS_MeshNode* n1245 = GetCentralNode( n1,n2,n4,n5,n12,n25,n45,n14,force3d );
2176 const SMDS_MeshNode* n1346 = GetCentralNode( n1,n3,n4,n6,n31,n36,n64,n14,force3d );
2177 const SMDS_MeshNode* n2356 = GetCentralNode( n2,n3,n6,n5,n23,n36,n56,n25,force3d );
2180 elem = meshDS->AddVolumeWithID(n1, n2, n3, n4, n5, n6,
2181 n12, n23, n31, n45, n56, n64, n14, n25, n36,
2182 n1245, n2356, n1346, id);
2184 elem = meshDS->AddVolume(n1, n2, n3, n4, n5, n6,
2185 n12, n23, n31, n45, n56, n64, n14, n25, n36,
2186 n1245, n2356, n1346);
2191 elem = meshDS->AddVolumeWithID(n1, n2, n3, n4, n5, n6,
2192 n12, n23, n31, n45, n56, n64, n14, n25, n36, id);
2194 elem = meshDS->AddVolume(n1, n2, n3, n4, n5, n6,
2195 n12, n23, n31, n45, n56, n64, n14, n25, n36);
2198 if ( mySetElemOnShape && myShapeID > 0 )
2199 meshDS->SetMeshElementOnShape( elem, myShapeID );
2204 //=======================================================================
2205 //function : AddVolume
2206 //purpose : Creates quadratic or linear tetrahedron
2207 //=======================================================================
2209 SMDS_MeshVolume* SMESH_MesherHelper::AddVolume(const SMDS_MeshNode* n1,
2210 const SMDS_MeshNode* n2,
2211 const SMDS_MeshNode* n3,
2212 const SMDS_MeshNode* n4,
2216 SMESHDS_Mesh * meshDS = GetMeshDS();
2217 SMDS_MeshVolume* elem = 0;
2218 if(!myCreateQuadratic) {
2220 elem = meshDS->AddVolumeWithID(n1, n2, n3, n4, id);
2222 elem = meshDS->AddVolume(n1, n2, n3, n4);
2225 const SMDS_MeshNode* n12 = GetMediumNode( n1, n2, force3d, TopAbs_SOLID );
2226 const SMDS_MeshNode* n23 = GetMediumNode( n2, n3, force3d, TopAbs_SOLID );
2227 const SMDS_MeshNode* n31 = GetMediumNode( n3, n1, force3d, TopAbs_SOLID );
2229 const SMDS_MeshNode* n14 = GetMediumNode( n1, n4, force3d, TopAbs_SOLID );
2230 const SMDS_MeshNode* n24 = GetMediumNode( n2, n4, force3d, TopAbs_SOLID );
2231 const SMDS_MeshNode* n34 = GetMediumNode( n3, n4, force3d, TopAbs_SOLID );
2234 elem = meshDS->AddVolumeWithID(n1, n2, n3, n4, n12, n23, n31, n14, n24, n34, id);
2236 elem = meshDS->AddVolume(n1, n2, n3, n4, n12, n23, n31, n14, n24, n34);
2238 if ( mySetElemOnShape && myShapeID > 0 )
2239 meshDS->SetMeshElementOnShape( elem, myShapeID );
2244 //=======================================================================
2245 //function : AddVolume
2246 //purpose : Creates quadratic or linear pyramid
2247 //=======================================================================
2249 SMDS_MeshVolume* SMESH_MesherHelper::AddVolume(const SMDS_MeshNode* n1,
2250 const SMDS_MeshNode* n2,
2251 const SMDS_MeshNode* n3,
2252 const SMDS_MeshNode* n4,
2253 const SMDS_MeshNode* n5,
2257 SMDS_MeshVolume* elem = 0;
2258 if(!myCreateQuadratic) {
2260 elem = GetMeshDS()->AddVolumeWithID(n1, n2, n3, n4, n5, id);
2262 elem = GetMeshDS()->AddVolume(n1, n2, n3, n4, n5);
2265 const SMDS_MeshNode* n12 = GetMediumNode( n1, n2, force3d, TopAbs_SOLID );
2266 const SMDS_MeshNode* n23 = GetMediumNode( n2, n3, force3d, TopAbs_SOLID );
2267 const SMDS_MeshNode* n34 = GetMediumNode( n3, n4, force3d, TopAbs_SOLID );
2268 const SMDS_MeshNode* n41 = GetMediumNode( n4, n1, force3d, TopAbs_SOLID );
2270 const SMDS_MeshNode* n15 = GetMediumNode( n1, n5, force3d, TopAbs_SOLID );
2271 const SMDS_MeshNode* n25 = GetMediumNode( n2, n5, force3d, TopAbs_SOLID );
2272 const SMDS_MeshNode* n35 = GetMediumNode( n3, n5, force3d, TopAbs_SOLID );
2273 const SMDS_MeshNode* n45 = GetMediumNode( n4, n5, force3d, TopAbs_SOLID );
2276 elem = GetMeshDS()->AddVolumeWithID ( n1, n2, n3, n4, n5,
2281 elem = GetMeshDS()->AddVolume( n1, n2, n3, n4, n5,
2283 n15, n25, n35, n45);
2285 if ( mySetElemOnShape && myShapeID > 0 )
2286 GetMeshDS()->SetMeshElementOnShape( elem, myShapeID );
2291 //=======================================================================
2292 //function : AddVolume
2293 //purpose : Creates tri-quadratic, quadratic or linear hexahedron
2294 //=======================================================================
2296 SMDS_MeshVolume* SMESH_MesherHelper::AddVolume(const SMDS_MeshNode* n1,
2297 const SMDS_MeshNode* n2,
2298 const SMDS_MeshNode* n3,
2299 const SMDS_MeshNode* n4,
2300 const SMDS_MeshNode* n5,
2301 const SMDS_MeshNode* n6,
2302 const SMDS_MeshNode* n7,
2303 const SMDS_MeshNode* n8,
2307 SMESHDS_Mesh * meshDS = GetMeshDS();
2308 SMDS_MeshVolume* elem = 0;
2309 if(!myCreateQuadratic) {
2311 elem = meshDS->AddVolumeWithID(n1, n2, n3, n4, n5, n6, n7, n8, id);
2313 elem = meshDS->AddVolume(n1, n2, n3, n4, n5, n6, n7, n8);
2316 const SMDS_MeshNode* n12 = GetMediumNode( n1, n2, force3d, TopAbs_SOLID );
2317 const SMDS_MeshNode* n23 = GetMediumNode( n2, n3, force3d, TopAbs_SOLID );
2318 const SMDS_MeshNode* n34 = GetMediumNode( n3, n4, force3d, TopAbs_SOLID );
2319 const SMDS_MeshNode* n41 = GetMediumNode( n4, n1, force3d, TopAbs_SOLID );
2321 const SMDS_MeshNode* n56 = GetMediumNode( n5, n6, force3d, TopAbs_SOLID );
2322 const SMDS_MeshNode* n67 = GetMediumNode( n6, n7, force3d, TopAbs_SOLID );
2323 const SMDS_MeshNode* n78 = GetMediumNode( n7, n8, force3d, TopAbs_SOLID );
2324 const SMDS_MeshNode* n85 = GetMediumNode( n8, n5, force3d, TopAbs_SOLID );
2326 const SMDS_MeshNode* n15 = GetMediumNode( n1, n5, force3d, TopAbs_SOLID );
2327 const SMDS_MeshNode* n26 = GetMediumNode( n2, n6, force3d, TopAbs_SOLID );
2328 const SMDS_MeshNode* n37 = GetMediumNode( n3, n7, force3d, TopAbs_SOLID );
2329 const SMDS_MeshNode* n48 = GetMediumNode( n4, n8, force3d, TopAbs_SOLID );
2330 if ( myCreateBiQuadratic )
2332 const SMDS_MeshNode* n1234 = GetCentralNode( n1,n2,n3,n4,n12,n23,n34,n41,force3d );
2333 const SMDS_MeshNode* n1256 = GetCentralNode( n1,n2,n5,n6,n12,n26,n56,n15,force3d );
2334 const SMDS_MeshNode* n2367 = GetCentralNode( n2,n3,n6,n7,n23,n37,n67,n26,force3d );
2335 const SMDS_MeshNode* n3478 = GetCentralNode( n3,n4,n7,n8,n34,n48,n78,n37,force3d );
2336 const SMDS_MeshNode* n1458 = GetCentralNode( n1,n4,n5,n8,n41,n48,n15,n85,force3d );
2337 const SMDS_MeshNode* n5678 = GetCentralNode( n5,n6,n7,n8,n56,n67,n78,n85,force3d );
2339 vector<gp_XYZ> pointsOnShapes( SMESH_Block::ID_Shell );
2341 pointsOnShapes[ SMESH_Block::ID_V000 ] = SMESH_TNodeXYZ( n4 );
2342 pointsOnShapes[ SMESH_Block::ID_V100 ] = SMESH_TNodeXYZ( n8 );
2343 pointsOnShapes[ SMESH_Block::ID_V010 ] = SMESH_TNodeXYZ( n3 );
2344 pointsOnShapes[ SMESH_Block::ID_V110 ] = SMESH_TNodeXYZ( n7 );
2345 pointsOnShapes[ SMESH_Block::ID_V001 ] = SMESH_TNodeXYZ( n1 );
2346 pointsOnShapes[ SMESH_Block::ID_V101 ] = SMESH_TNodeXYZ( n5 );
2347 pointsOnShapes[ SMESH_Block::ID_V011 ] = SMESH_TNodeXYZ( n2 );
2348 pointsOnShapes[ SMESH_Block::ID_V111 ] = SMESH_TNodeXYZ( n6 );
2350 pointsOnShapes[ SMESH_Block::ID_Ex00 ] = SMESH_TNodeXYZ( n48 );
2351 pointsOnShapes[ SMESH_Block::ID_Ex10 ] = SMESH_TNodeXYZ( n37 );
2352 pointsOnShapes[ SMESH_Block::ID_E0y0 ] = SMESH_TNodeXYZ( n15 );
2353 pointsOnShapes[ SMESH_Block::ID_E1y0 ] = SMESH_TNodeXYZ( n26 );
2354 pointsOnShapes[ SMESH_Block::ID_Ex01 ] = SMESH_TNodeXYZ( n34 );
2355 pointsOnShapes[ SMESH_Block::ID_Ex11 ] = SMESH_TNodeXYZ( n78 );
2356 pointsOnShapes[ SMESH_Block::ID_E0y1 ] = SMESH_TNodeXYZ( n12 );
2357 pointsOnShapes[ SMESH_Block::ID_E1y1 ] = SMESH_TNodeXYZ( n56 );
2358 pointsOnShapes[ SMESH_Block::ID_E00z ] = SMESH_TNodeXYZ( n41 );
2359 pointsOnShapes[ SMESH_Block::ID_E10z ] = SMESH_TNodeXYZ( n85 );
2360 pointsOnShapes[ SMESH_Block::ID_E01z ] = SMESH_TNodeXYZ( n23 );
2361 pointsOnShapes[ SMESH_Block::ID_E11z ] = SMESH_TNodeXYZ( n67 );
2363 pointsOnShapes[ SMESH_Block::ID_Fxy0 ] = SMESH_TNodeXYZ( n3478 );
2364 pointsOnShapes[ SMESH_Block::ID_Fxy1 ] = SMESH_TNodeXYZ( n1256 );
2365 pointsOnShapes[ SMESH_Block::ID_Fx0z ] = SMESH_TNodeXYZ( n1458 );
2366 pointsOnShapes[ SMESH_Block::ID_Fx1z ] = SMESH_TNodeXYZ( n2367 );
2367 pointsOnShapes[ SMESH_Block::ID_F0yz ] = SMESH_TNodeXYZ( n1234 );
2368 pointsOnShapes[ SMESH_Block::ID_F1yz ] = SMESH_TNodeXYZ( n5678 );
2370 gp_XYZ centerCube(0.5, 0.5, 0.5);
2372 SMESH_Block::ShellPoint( centerCube, pointsOnShapes, nCenterElem );
2373 const SMDS_MeshNode* nCenter =
2374 meshDS->AddNode( nCenterElem.X(), nCenterElem.Y(), nCenterElem.Z() );
2375 meshDS->SetNodeInVolume( nCenter, myShapeID );
2378 elem = meshDS->AddVolumeWithID(n1, n2, n3, n4, n5, n6, n7, n8,
2379 n12, n23, n34, n41, n56, n67,
2380 n78, n85, n15, n26, n37, n48,
2381 n1234, n1256, n2367, n3478, n1458, n5678, nCenter, id);
2383 elem = meshDS->AddVolume(n1, n2, n3, n4, n5, n6, n7, n8,
2384 n12, n23, n34, n41, n56, n67,
2385 n78, n85, n15, n26, n37, n48,
2386 n1234, n1256, n2367, n3478, n1458, n5678, nCenter);
2391 elem = meshDS->AddVolumeWithID(n1, n2, n3, n4, n5, n6, n7, n8,
2392 n12, n23, n34, n41, n56, n67,
2393 n78, n85, n15, n26, n37, n48, id);
2395 elem = meshDS->AddVolume(n1, n2, n3, n4, n5, n6, n7, n8,
2396 n12, n23, n34, n41, n56, n67,
2397 n78, n85, n15, n26, n37, n48);
2400 if ( mySetElemOnShape && myShapeID > 0 )
2401 meshDS->SetMeshElementOnShape( elem, myShapeID );
2406 //=======================================================================
2407 //function : AddVolume
2408 //purpose : Creates LINEAR!!!!!!!!! octahedron
2409 //=======================================================================
2411 SMDS_MeshVolume* SMESH_MesherHelper::AddVolume(const SMDS_MeshNode* n1,
2412 const SMDS_MeshNode* n2,
2413 const SMDS_MeshNode* n3,
2414 const SMDS_MeshNode* n4,
2415 const SMDS_MeshNode* n5,
2416 const SMDS_MeshNode* n6,
2417 const SMDS_MeshNode* n7,
2418 const SMDS_MeshNode* n8,
2419 const SMDS_MeshNode* n9,
2420 const SMDS_MeshNode* n10,
2421 const SMDS_MeshNode* n11,
2422 const SMDS_MeshNode* n12,
2426 SMESHDS_Mesh * meshDS = GetMeshDS();
2427 SMDS_MeshVolume* elem = 0;
2429 elem = meshDS->AddVolumeWithID(n1,n2,n3,n4,n5,n6,n7,n8,n9,n10,n11,n12,id);
2431 elem = meshDS->AddVolume(n1,n2,n3,n4,n5,n6,n7,n8,n9,n10,n11,n12);
2432 if ( mySetElemOnShape && myShapeID > 0 )
2433 meshDS->SetMeshElementOnShape( elem, myShapeID );
2437 //=======================================================================
2438 //function : AddPolyhedralVolume
2439 //purpose : Creates polyhedron. In quadratic mesh, adds medium nodes
2440 //=======================================================================
2443 SMESH_MesherHelper::AddPolyhedralVolume (const std::vector<const SMDS_MeshNode*>& nodes,
2444 const std::vector<int>& quantities,
2448 SMESHDS_Mesh * meshDS = GetMeshDS();
2449 SMDS_MeshVolume* elem = 0;
2450 if(!myCreateQuadratic)
2453 elem = meshDS->AddPolyhedralVolumeWithID(nodes, quantities, id);
2455 elem = meshDS->AddPolyhedralVolume(nodes, quantities);
2459 vector<const SMDS_MeshNode*> newNodes;
2460 vector<int> newQuantities;
2461 for ( size_t iFace = 0, iN = 0; iFace < quantities.size(); ++iFace )
2463 int nbNodesInFace = quantities[iFace];
2464 newQuantities.push_back(0);
2465 for ( int i = 0; i < nbNodesInFace; ++i )
2467 const SMDS_MeshNode* n1 = nodes[ iN + i ];
2468 newNodes.push_back( n1 );
2469 newQuantities.back()++;
2471 const SMDS_MeshNode* n2 = nodes[ iN + ( i+1==nbNodesInFace ? 0 : i+1 )];
2472 // if ( n1->GetPosition()->GetTypeOfPosition() != SMDS_TOP_3DSPACE &&
2473 // n2->GetPosition()->GetTypeOfPosition() != SMDS_TOP_3DSPACE )
2475 const SMDS_MeshNode* n12 = GetMediumNode( n1, n2, force3d, TopAbs_SOLID );
2476 newNodes.push_back( n12 );
2477 newQuantities.back()++;
2480 iN += nbNodesInFace;
2483 elem = meshDS->AddPolyhedralVolumeWithID( newNodes, newQuantities, id );
2485 elem = meshDS->AddPolyhedralVolume( newNodes, newQuantities );
2487 if ( mySetElemOnShape && myShapeID > 0 )
2488 meshDS->SetMeshElementOnShape( elem, myShapeID );
2495 //================================================================================
2497 * \brief Check if a node belongs to any face of sub-mesh
2499 //================================================================================
2501 bool isNodeInSubMesh( const SMDS_MeshNode* n, const SMESHDS_SubMesh* sm )
2503 SMDS_ElemIteratorPtr fIt = n->GetInverseElementIterator( SMDSAbs_Face );
2504 while ( fIt->more() )
2505 if ( sm->Contains( fIt->next() ))
2511 //=======================================================================
2512 //function : IsSameElemGeometry
2513 //purpose : Returns true if all elements of a sub-mesh are of same shape
2514 //=======================================================================
2516 bool SMESH_MesherHelper::IsSameElemGeometry(const SMESHDS_SubMesh* smDS,
2517 SMDSAbs_GeometryType shape,
2518 const bool nullSubMeshRes)
2520 if ( !smDS ) return nullSubMeshRes;
2522 SMDS_ElemIteratorPtr elemIt = smDS->GetElements();
2523 while ( elemIt->more() ) {
2524 const SMDS_MeshElement* e = elemIt->next();
2525 if ( e->GetGeomType() != shape )
2531 //=======================================================================
2532 //function : LoadNodeColumns
2533 //purpose : Load nodes bound to face into a map of node columns
2534 //=======================================================================
2536 bool SMESH_MesherHelper::LoadNodeColumns(TParam2ColumnMap & theParam2ColumnMap,
2537 const TopoDS_Face& theFace,
2538 const TopoDS_Edge& theBaseEdge,
2539 SMESHDS_Mesh* theMesh,
2540 SMESH_ProxyMesh* theProxyMesh)
2542 return LoadNodeColumns(theParam2ColumnMap,
2544 std::list<TopoDS_Edge>(1,theBaseEdge),
2549 //=======================================================================
2550 //function : LoadNodeColumns
2551 //purpose : Load nodes bound to face into a map of node columns
2552 //=======================================================================
2554 bool SMESH_MesherHelper::LoadNodeColumns(TParam2ColumnMap & theParam2ColumnMap,
2555 const TopoDS_Face& theFace,
2556 const std::list<TopoDS_Edge>& theBaseSide,
2557 SMESHDS_Mesh* theMesh,
2558 SMESH_ProxyMesh* theProxyMesh)
2560 // get a right sub-mesh of theFace
2562 const SMESHDS_SubMesh* faceSubMesh = 0;
2565 faceSubMesh = theProxyMesh->GetSubMesh( theFace );
2566 if ( !faceSubMesh ||
2567 faceSubMesh->NbElements() == 0 ||
2568 theProxyMesh->IsTemporary( faceSubMesh->GetElements()->next() ))
2570 // can use a proxy sub-mesh with not temporary elements only
2576 faceSubMesh = theMesh->MeshElements( theFace );
2577 if ( !faceSubMesh || faceSubMesh->NbElements() == 0 )
2580 if ( theParam2ColumnMap.empty() )
2582 // get data of edges for normalization of params
2583 vector< double > length;
2585 list<TopoDS_Edge>::const_iterator edge;
2587 for ( edge = theBaseSide.begin(); edge != theBaseSide.end(); ++edge )
2589 double len = std::max( 1e-10, SMESH_Algo::EdgeLength( *edge ));
2591 length.push_back( len );
2595 // get nodes on theBaseEdge sorted by param on edge and initialize theParam2ColumnMap with them
2596 const SMDS_MeshNode* prevEndNodes[2] = { 0, 0 };
2597 edge = theBaseSide.begin();
2598 for ( int iE = 0; edge != theBaseSide.end(); ++edge, ++iE )
2600 map< double, const SMDS_MeshNode*> sortedBaseNN;
2601 SMESH_Algo::GetSortedNodesOnEdge( theMesh, *edge,/*noMedium=*/true, sortedBaseNN );
2603 map< double, const SMDS_MeshNode*>::iterator u_n;
2604 // pb with mesh_Projection_2D_00/A1 fixed by adding expectedSupport arg to GetMediumPos()
2605 // so the following solution is commented (hope forever :)
2607 // SMESH_Algo::GetSortedNodesOnEdge( theMesh, *edge,/*noMedium=*/true, sortedBaseNN,
2608 // // SMDSAbs_Edge here is needed to be coherent with
2609 // // StdMeshers_FaceSide used by Quadrangle to get nodes
2610 // // on EDGE; else pb in mesh_Projection_2D_00/A1 where a
2611 // // medium node on EDGE is medium in a triangle but not
2614 // if ( faceSubMesh->GetElements()->next()->IsQuadratic() )
2615 // // filter off nodes medium in faces on theFace (same pb with mesh_Projection_2D_00/A1)
2616 // for ( u_n = sortedBaseNN.begin(); u_n != sortedBaseNN.end() ; )
2618 // const SMDS_MeshNode* node = u_n->second;
2619 // SMDS_ElemIteratorPtr faceIt = node->GetInverseElementIterator( SMDSAbs_Face );
2620 // if ( faceIt->more() && node ) {
2621 // const SMDS_MeshElement* face = faceIt->next();
2622 // if ( faceSubMesh->Contains( face ) && face->IsMediumNode( node ))
2626 // sortedBaseNN.erase( u_n++ );
2630 if ( sortedBaseNN.empty() ) continue;
2632 u_n = sortedBaseNN.begin();
2633 if ( theProxyMesh ) // from sortedBaseNN remove nodes not shared by faces of faceSubMesh
2635 const SMDS_MeshNode* n1 = (++sortedBaseNN.begin())->second;
2636 const SMDS_MeshNode* n2 = (++sortedBaseNN.rbegin())->second;
2637 bool allNodesAreProxy = ( n1 != theProxyMesh->GetProxyNode( n1 ) &&
2638 n2 != theProxyMesh->GetProxyNode( n2 ));
2639 if ( allNodesAreProxy )
2640 for ( u_n = sortedBaseNN.begin(); u_n != sortedBaseNN.end(); u_n++ )
2641 u_n->second = theProxyMesh->GetProxyNode( u_n->second );
2643 if ( u_n = sortedBaseNN.begin(), !isNodeInSubMesh( u_n->second, faceSubMesh ))
2645 while ( ++u_n != sortedBaseNN.end() && !isNodeInSubMesh( u_n->second, faceSubMesh ));
2646 sortedBaseNN.erase( sortedBaseNN.begin(), u_n );
2648 if ( !sortedBaseNN.empty() )
2649 if ( u_n = --sortedBaseNN.end(), !isNodeInSubMesh( u_n->second, faceSubMesh ))
2651 while ( u_n != sortedBaseNN.begin() && !isNodeInSubMesh( (--u_n)->second, faceSubMesh ));
2652 sortedBaseNN.erase( ++u_n, sortedBaseNN.end() );
2654 if ( sortedBaseNN.empty() ) continue;
2658 BRep_Tool::Range( *edge, f, l );
2659 if ( edge->Orientation() == TopAbs_REVERSED ) std::swap( f, l );
2660 const double coeff = 1. / ( l - f ) * length[iE] / fullLen;
2661 const double prevPar = theParam2ColumnMap.empty() ? 0 : theParam2ColumnMap.rbegin()->first;
2662 for ( u_n = sortedBaseNN.begin(); u_n != sortedBaseNN.end(); u_n++ )
2664 if ( u_n->second == prevEndNodes[0] ||
2665 u_n->second == prevEndNodes[1] )
2667 double par = prevPar + coeff * ( u_n->first - f );
2668 TParam2ColumnMap::iterator u2nn =
2669 theParam2ColumnMap.insert( theParam2ColumnMap.end(), make_pair( par, TNodeColumn()));
2670 u2nn->second.push_back( u_n->second );
2672 prevEndNodes[0] = sortedBaseNN.begin()->second;
2673 prevEndNodes[1] = sortedBaseNN.rbegin()->second;
2675 if ( theParam2ColumnMap.size() < 2 )
2680 size_t prevNbRows = theParam2ColumnMap.begin()->second.size(); // current, at least 1 here
2681 size_t expectNbRows = faceSubMesh->NbElements() / ( theParam2ColumnMap.size()-1 ); // to be added
2683 // fill theParam2ColumnMap column by column by passing from nodes on
2684 // theBaseEdge up via mesh faces on theFace
2686 TParam2ColumnMap::iterator par_nVec_1, par_nVec_2;
2687 par_nVec_2 = theParam2ColumnMap.begin();
2688 par_nVec_1 = par_nVec_2++;
2689 TIDSortedElemSet emptySet, avoidSet;
2690 for ( ; par_nVec_2 != theParam2ColumnMap.end(); ++par_nVec_1, ++par_nVec_2 )
2692 vector<const SMDS_MeshNode*>& nCol1 = par_nVec_1->second;
2693 vector<const SMDS_MeshNode*>& nCol2 = par_nVec_2->second;
2694 nCol1.resize( prevNbRows + expectNbRows );
2695 nCol2.resize( prevNbRows + expectNbRows );
2697 int i1, i2; size_t foundNbRows = 0;
2698 const SMDS_MeshNode *n1 = nCol1[ prevNbRows-1 ];
2699 const SMDS_MeshNode *n2 = nCol2[ prevNbRows-1 ];
2700 // find face sharing node n1 and n2 and belonging to faceSubMesh
2701 while ( const SMDS_MeshElement* face =
2702 SMESH_MeshAlgos::FindFaceInSet( n1, n2, emptySet, avoidSet, &i1, &i2))
2704 if ( faceSubMesh->Contains( face ))
2706 int nbNodes = face->NbCornerNodes();
2709 if ( foundNbRows + 1 > expectNbRows )
2711 n1 = face->GetNode( (i2+2) % 4 ); // opposite corner of quadrangle face
2712 n2 = face->GetNode( (i1+2) % 4 );
2713 nCol1[ prevNbRows + foundNbRows] = n1;
2714 nCol2[ prevNbRows + foundNbRows] = n2;
2717 avoidSet.insert( face );
2719 if ((size_t) foundNbRows != expectNbRows )
2723 return ( theParam2ColumnMap.size() > 1 &&
2724 theParam2ColumnMap.begin()->second.size() == prevNbRows + expectNbRows );
2729 //================================================================================
2731 * \brief Return true if a node is at a corner of a 2D structured mesh of FACE
2733 //================================================================================
2735 bool isCornerOfStructure( const SMDS_MeshNode* n,
2736 const SMESHDS_SubMesh* faceSM,
2737 SMESH_MesherHelper& faceAnalyser )
2739 int nbFacesInSM = 0;
2741 SMDS_ElemIteratorPtr fIt = n->GetInverseElementIterator( SMDSAbs_Face );
2742 while ( fIt->more() )
2743 nbFacesInSM += faceSM->Contains( fIt->next() );
2745 if ( nbFacesInSM == 1 )
2748 if ( nbFacesInSM == 2 && n->GetPosition()->GetTypeOfPosition() == SMDS_TOP_VERTEX )
2750 return faceAnalyser.IsRealSeam( n->getshapeId() );
2756 //=======================================================================
2757 //function : IsStructured
2758 //purpose : Return true if 2D mesh on FACE is a structured rectangle
2759 //=======================================================================
2761 bool SMESH_MesherHelper::IsStructured( SMESH_subMesh* faceSM )
2763 SMESHDS_SubMesh* fSM = faceSM->GetSubMeshDS();
2764 if ( !fSM || fSM->NbElements() == 0 )
2767 list< TopoDS_Edge > edges;
2768 list< int > nbEdgesInWires;
2769 int nbWires = SMESH_Block::GetOrderedEdges( TopoDS::Face( faceSM->GetSubShape() ),
2770 edges, nbEdgesInWires );
2771 if ( nbWires != 1 /*|| nbEdgesInWires.front() != 4*/ ) // allow composite sides
2774 // algo: find corners of a structure and then analyze nb of faces and
2775 // length of structure sides
2777 SMESHDS_Mesh* meshDS = faceSM->GetFather()->GetMeshDS();
2778 SMESH_MesherHelper faceAnalyser( *faceSM->GetFather() );
2779 faceAnalyser.SetSubShape( faceSM->GetSubShape() );
2781 // rotate edges to get the first node being at corner
2782 // (in principle it's not necessary because so far none SALOME algo can make
2783 // such a structured mesh that all corner nodes are not on VERTEXes)
2784 bool isCorner = false;
2785 int nbRemainEdges = nbEdgesInWires.front();
2787 TopoDS_Vertex V = IthVertex( 0, edges.front() );
2788 isCorner = isCornerOfStructure( SMESH_Algo::VertexNode( V, meshDS ),
2791 edges.splice( edges.end(), edges, edges.begin() );
2795 while ( !isCorner && nbRemainEdges > 0 );
2800 // get all nodes from EDGEs
2801 list< const SMDS_MeshNode* > nodes;
2802 list< TopoDS_Edge >::iterator edge = edges.begin();
2803 for ( ; edge != edges.end(); ++edge )
2805 map< double, const SMDS_MeshNode* > u2Nodes;
2806 if ( !SMESH_Algo::GetSortedNodesOnEdge( meshDS, *edge,
2807 /*skipMedium=*/true, u2Nodes ))
2810 list< const SMDS_MeshNode* > edgeNodes;
2811 map< double, const SMDS_MeshNode* >::iterator u2n = u2Nodes.begin();
2812 for ( ; u2n != u2Nodes.end(); ++u2n )
2813 edgeNodes.push_back( u2n->second );
2814 if ( edge->Orientation() == TopAbs_REVERSED )
2815 edgeNodes.reverse();
2817 if ( !nodes.empty() && nodes.back() == edgeNodes.front() )
2818 edgeNodes.pop_front();
2819 nodes.splice( nodes.end(), edgeNodes, edgeNodes.begin(), edgeNodes.end() );
2822 // get length of structured sides
2823 vector<int> nbEdgesInSide;
2825 list< const SMDS_MeshNode* >::iterator n = ++nodes.begin();
2826 for ( ; n != nodes.end(); ++n )
2829 if ( isCornerOfStructure( *n, fSM, faceAnalyser )) {
2830 nbEdgesInSide.push_back( nbEdges );
2836 if ( nbEdgesInSide.size() != 4 )
2838 if ( nbEdgesInSide[0] != nbEdgesInSide[2] )
2840 if ( nbEdgesInSide[1] != nbEdgesInSide[3] )
2842 if ( nbEdgesInSide[0] * nbEdgesInSide[1] != fSM->NbElements() )
2848 //=======================================================================
2849 //function : IsDistorted2D
2850 //purpose : Return true if 2D mesh on FACE is ditorted
2851 //=======================================================================
2853 bool SMESH_MesherHelper::IsDistorted2D( SMESH_subMesh* faceSM,
2855 SMESH_MesherHelper* faceHelper)
2857 if ( !faceSM || faceSM->GetSubShape().ShapeType() != TopAbs_FACE )
2860 bool haveBadFaces = false;
2862 SMESH_MesherHelper helper( *faceSM->GetFather() );
2864 helper.CopySubShapeInfo( *faceHelper );
2865 helper.SetSubShape( faceSM->GetSubShape() );
2867 const TopoDS_Face& F = TopoDS::Face( faceSM->GetSubShape() );
2868 SMESHDS_SubMesh* smDS = helper.GetMeshDS()->MeshElements( F );
2869 if ( !smDS || smDS->NbElements() == 0 ) return false;
2871 bool subIdsValid = true; // shape ID of nodes is OK
2872 if ( helper.HasSeam() )
2874 // check if nodes are bound to seam edges
2875 SMESH_subMeshIteratorPtr smIt = faceSM->getDependsOnIterator(/*includeSelf=*/false);
2876 while ( smIt->more() && subIdsValid )
2878 SMESH_subMesh* sm = smIt->next();
2879 if ( helper.IsSeamShape( sm->GetId() ) && sm->IsEmpty() )
2880 subIdsValid = false;
2883 SMDS_ElemIteratorPtr faceIt = smDS->GetElements();
2884 double prevArea = 0;
2885 vector< const SMDS_MeshNode* > nodes;
2887 bool* toCheckUV = checkUV ? & checkUV : 0;
2888 while ( faceIt->more() && !haveBadFaces )
2890 const SMDS_MeshElement* face = faceIt->next();
2893 nodes.resize( face->NbCornerNodes() );
2894 SMDS_MeshElement::iterator n = face->begin_nodes();
2895 for ( size_t i = 0; i < nodes.size(); ++n, ++i )
2898 // avoid elems on degenerate shapes as UV on them can be wrong
2899 if ( helper.HasDegeneratedEdges() )
2901 bool isOnDegen = false;
2902 for ( size_t i = 0; ( i < nodes.size() && !isOnDegen ); ++i )
2903 isOnDegen = helper.IsDegenShape( nodes[ i ]->getshapeId() );
2907 // prepare for getting UVs
2908 const SMDS_MeshNode* inFaceNode = 0;
2909 if ( helper.HasSeam() ) {
2910 for ( size_t i = 0; ( i < nodes.size() && !inFaceNode ); ++i )
2911 if ( !helper.IsSeamShape( nodes[ i ]->getshapeId() ))
2913 inFaceNode = nodes[ i ];
2916 gp_XY uv = helper.GetNodeUV( F, inFaceNode );
2917 if ( helper.IsOnSeam( uv ))
2925 uv.resize( nodes.size() );
2926 for ( size_t i = 0; i < nodes.size(); ++i )
2927 uv[ i ] = helper.GetNodeUV( F, nodes[ i ], inFaceNode, toCheckUV );
2929 if ( !subIdsValid ) // fix uv on seam
2931 gp_XY uvInFace = helper.GetNodeUV( F, inFaceNode );
2932 for ( size_t i = 0; i < uv.size(); ++i )
2933 if ( helper.IsOnSeam( uv[i] ))
2934 uv[i] = helper.getUVOnSeam( uv[i], uvInFace ).XY();
2937 // compare orientation of triangles
2938 double faceArea = 0;
2939 for ( int iT = 0, nbT = nodes.size()-2; iT < nbT; ++iT )
2941 gp_XY v1 = uv[ iT+1 ] - uv[ 0 ];
2942 gp_XY v2 = uv[ iT+2 ] - uv[ 0 ];
2943 faceArea += v2 ^ v1;
2945 haveBadFaces = ( faceArea * prevArea < 0 );
2946 prevArea = faceArea;
2949 return haveBadFaces;
2952 //================================================================================
2954 * \brief Find out elements orientation on a geometrical face
2955 * \param theFace - The face correctly oriented in the shape being meshed
2956 * \retval bool - true if the face normal and the normal of first element
2957 * in the corresponding submesh point in different directions
2959 //================================================================================
2961 bool SMESH_MesherHelper::IsReversedSubMesh (const TopoDS_Face& theFace)
2963 if ( theFace.IsNull() )
2966 // find out orientation of a meshed face
2967 int faceID = GetMeshDS()->ShapeToIndex( theFace );
2968 TopoDS_Shape aMeshedFace = GetMeshDS()->IndexToShape( faceID );
2969 bool isReversed = ( theFace.Orientation() != aMeshedFace.Orientation() );
2971 const SMESHDS_SubMesh * aSubMeshDSFace = GetMeshDS()->MeshElements( faceID );
2972 if ( !aSubMeshDSFace )
2975 // find an element on a bounday of theFace
2976 SMDS_ElemIteratorPtr iteratorElem = aSubMeshDSFace->GetElements();
2977 const SMDS_MeshNode* nn[2];
2978 while ( iteratorElem->more() ) // loop on elements on theFace
2980 const SMDS_MeshElement* elem = iteratorElem->next();
2981 if ( ! elem ) continue;
2983 // look for 2 nodes on EDGE
2984 int nbNodes = elem->NbCornerNodes();
2985 nn[0] = elem->GetNode( nbNodes-1 );
2986 for ( int iN = 0; iN < nbNodes; ++iN )
2988 nn[1] = elem->GetNode( iN );
2989 if ( nn[0]->GetPosition()->GetDim() < 2 &&
2990 nn[1]->GetPosition()->GetDim() < 2 )
2992 TopoDS_Shape s0 = GetSubShapeByNode( nn[0], GetMeshDS() );
2993 TopoDS_Shape s1 = GetSubShapeByNode( nn[1], GetMeshDS() );
2994 TopoDS_Shape E = GetCommonAncestor( s0, s1, *myMesh, TopAbs_EDGE );
2995 if ( !E.IsNull() && !s0.IsSame( s1 ) && E.Orientation() != TopAbs_INTERNAL )
2999 for ( TopExp_Explorer exp( theFace, TopAbs_EDGE ); exp.More(); exp.Next() )
3000 if ( E.IsSame( exp.Current() )) {
3002 E = exp.Current(); // to know orientation
3007 double u0 = GetNodeU( TopoDS::Edge( E ), nn[0], nn[1], &ok );
3008 double u1 = GetNodeU( TopoDS::Edge( E ), nn[1], nn[0], &ok );
3011 // check that the 2 nodes are connected with a segment (IPAL53055)
3013 const SMDS_MeshElement* seg;
3014 if ( SMESHDS_SubMesh* sm = GetMeshDS()->MeshElements( E ))
3015 if (( sm->NbElements() > 0 ) &&
3016 ( seg = GetMeshDS()->FindEdge( nn[0], nn[1] )))
3017 ok = sm->Contains( seg );
3021 isReversed = ( u0 > u1 );
3022 if ( E.Orientation() == TopAbs_REVERSED )
3023 isReversed = !isReversed;
3033 // find an element with a good normal
3035 bool normalOK = false;
3037 iteratorElem = aSubMeshDSFace->GetElements();
3038 while ( !normalOK && iteratorElem->more() ) // loop on elements on theFace
3040 const SMDS_MeshElement* elem = iteratorElem->next();
3041 if ( ! SMESH_MeshAlgos::FaceNormal( elem, const_cast<gp_XYZ&>( Ne.XYZ() ), /*normalized=*/0 ))
3045 // get UV of a node inside theFACE
3046 SMDS_ElemIteratorPtr nodesIt = elem->nodesIterator();
3047 const SMDS_MeshNode* nInFace = 0;
3048 int iPosDim = SMDS_TOP_VERTEX;
3049 while ( nodesIt->more() ) // loop on nodes
3051 const SMDS_MeshNode* n = static_cast<const SMDS_MeshNode*>( nodesIt->next() );
3052 if ( n->GetPosition()->GetTypeOfPosition() >= iPosDim )
3055 iPosDim = n->GetPosition()->GetTypeOfPosition();
3058 uv = GetNodeUV( theFace, nInFace, 0, &normalOK );
3063 // face normal at node position
3064 TopLoc_Location loc;
3065 Handle(Geom_Surface) surf = BRep_Tool::Surface( theFace, loc );
3066 // if ( surf.IsNull() || surf->Continuity() < GeomAbs_C1 )
3067 // some surfaces not detected as GeomAbs_C1 are nevertheless correct for meshing
3068 if ( surf.IsNull() || surf->Continuity() < GeomAbs_C0 )
3071 gp_Vec d1u, d1v; gp_Pnt p;
3072 surf->D1( uv.X(), uv.Y(), p, d1u, d1v );
3073 gp_Vec Nf = (d1u ^ d1v).Transformed( loc );
3075 if ( theFace.Orientation() == TopAbs_REVERSED )
3078 return Ne * Nf < 0.;
3081 //=======================================================================
3083 //purpose : Count nb of sub-shapes
3084 //=======================================================================
3086 int SMESH_MesherHelper::Count(const TopoDS_Shape& shape,
3087 const TopAbs_ShapeEnum type,
3088 const bool ignoreSame)
3091 TopTools_IndexedMapOfShape map;
3092 TopExp::MapShapes( shape, type, map );
3093 return map.Extent();
3097 for ( TopExp_Explorer exp( shape, type ); exp.More(); exp.Next() )
3103 //=======================================================================
3104 //function : NbAncestors
3105 //purpose : Return number of unique ancestors of the shape
3106 //=======================================================================
3108 int SMESH_MesherHelper::NbAncestors(const TopoDS_Shape& shape,
3109 const SMESH_Mesh& mesh,
3110 TopAbs_ShapeEnum ancestorType/*=TopAbs_SHAPE*/)
3112 TopTools_MapOfShape ancestors;
3113 TopTools_ListIteratorOfListOfShape ansIt( mesh.GetAncestors(shape) );
3114 for ( ; ansIt.More(); ansIt.Next() ) {
3115 if ( ancestorType == TopAbs_SHAPE || ansIt.Value().ShapeType() == ancestorType )
3116 ancestors.Add( ansIt.Value() );
3118 return ancestors.Extent();
3121 //=======================================================================
3122 //function : GetSubShapeOri
3123 //purpose : Return orientation of sub-shape in the main shape
3124 //=======================================================================
3126 TopAbs_Orientation SMESH_MesherHelper::GetSubShapeOri(const TopoDS_Shape& shape,
3127 const TopoDS_Shape& subShape)
3129 TopAbs_Orientation ori = TopAbs_Orientation(-1);
3130 if ( !shape.IsNull() && !subShape.IsNull() )
3132 TopExp_Explorer e( shape, subShape.ShapeType() );
3133 if ( shape.Orientation() >= TopAbs_INTERNAL ) // TopAbs_INTERNAL or TopAbs_EXTERNAL
3134 e.Init( shape.Oriented(TopAbs_FORWARD), subShape.ShapeType() );
3135 for ( ; e.More(); e.Next())
3136 if ( subShape.IsSame( e.Current() ))
3139 ori = e.Current().Orientation();
3144 //=======================================================================
3145 //function : IsSubShape
3147 //=======================================================================
3149 bool SMESH_MesherHelper::IsSubShape( const TopoDS_Shape& shape,
3150 const TopoDS_Shape& mainShape )
3152 if ( !shape.IsNull() && !mainShape.IsNull() )
3154 for ( TopExp_Explorer exp( mainShape, shape.ShapeType());
3157 if ( shape.IsSame( exp.Current() ))
3163 //=======================================================================
3164 //function : IsSubShape
3166 //=======================================================================
3168 bool SMESH_MesherHelper::IsSubShape( const TopoDS_Shape& shape, SMESH_Mesh* aMesh )
3170 if ( shape.IsNull() || !aMesh )
3173 aMesh->GetMeshDS()->ShapeToIndex( shape ) ||
3175 (shape.ShapeType() == TopAbs_COMPOUND && aMesh->GetMeshDS()->IsGroupOfSubShapes( shape ));
3178 //=======================================================================
3179 //function : IsBlock
3181 //=======================================================================
3183 bool SMESH_MesherHelper::IsBlock( const TopoDS_Shape& shape )
3185 if ( shape.IsNull() )
3189 TopExp_Explorer exp( shape, TopAbs_SHELL );
3190 if ( !exp.More() ) return false;
3191 shell = TopoDS::Shell( exp.Current() );
3192 if ( exp.Next(), exp.More() ) return false;
3195 TopTools_IndexedMapOfOrientedShape map;
3196 return SMESH_Block::FindBlockShapes( shell, v, v, map );
3200 //================================================================================
3202 * \brief Return maximal tolerance of shape
3204 //================================================================================
3206 double SMESH_MesherHelper::MaxTolerance( const TopoDS_Shape& shape )
3208 double tol = Precision::Confusion();
3209 TopExp_Explorer exp;
3210 for ( exp.Init( shape, TopAbs_FACE ); exp.More(); exp.Next() )
3211 tol = Max( tol, BRep_Tool::Tolerance( TopoDS::Face( exp.Current())));
3212 for ( exp.Init( shape, TopAbs_EDGE ); exp.More(); exp.Next() )
3213 tol = Max( tol, BRep_Tool::Tolerance( TopoDS::Edge( exp.Current())));
3214 for ( exp.Init( shape, TopAbs_VERTEX ); exp.More(); exp.Next() )
3215 tol = Max( tol, BRep_Tool::Tolerance( TopoDS::Vertex( exp.Current())));
3220 //================================================================================
3222 * \brief Return MaxTolerance( face ), probably cached
3224 //================================================================================
3226 double SMESH_MesherHelper::getFaceMaxTol( const TopoDS_Shape& face ) const
3228 int faceID = GetMeshDS()->ShapeToIndex( face );
3230 SMESH_MesherHelper* me = const_cast< SMESH_MesherHelper* >( this );
3231 double & tol = me->myFaceMaxTol.insert( make_pair( faceID, -1. )).first->second;
3233 tol = MaxTolerance( face );
3238 //================================================================================
3240 * \brief Return an angle between two EDGEs sharing a common VERTEX with reference
3241 * of the FACE normal
3242 * \return double - the angle (between -Pi and Pi), negative if the angle is concave,
3243 * 1e100 in case of failure
3244 * \warning Care about order of the EDGEs and their orientation to be as they are
3245 * within the FACE! Don't pass degenerated EDGEs neither!
3247 //================================================================================
3249 double SMESH_MesherHelper::GetAngle( const TopoDS_Edge & theE1,
3250 const TopoDS_Edge & theE2,
3251 const TopoDS_Face & theFace,
3252 const TopoDS_Vertex & theCommonV,
3253 gp_Vec* theFaceNormal)
3255 double angle = 1e100;
3259 Handle(Geom_Curve) c1 = BRep_Tool::Curve( theE1, f,l );
3260 Handle(Geom_Curve) c2 = BRep_Tool::Curve( theE2, f,l );
3261 Handle(Geom2d_Curve) c2d1 = BRep_Tool::CurveOnSurface( theE1, theFace, f,l );
3262 Handle(Geom_Surface) surf = BRep_Tool::Surface( theFace );
3263 double p1 = BRep_Tool::Parameter( theCommonV, theE1 );
3264 double p2 = BRep_Tool::Parameter( theCommonV, theE2 );
3265 if ( c1.IsNull() || c2.IsNull() )
3267 gp_XY uv = c2d1->Value( p1 ).XY();
3268 gp_Vec du, dv; gp_Pnt p;
3269 surf->D1( uv.X(), uv.Y(), p, du, dv );
3270 gp_Vec vec1, vec2, vecRef = du ^ dv;
3273 while ( vecRef.SquareMagnitude() < 1e-25 )
3275 double dp = ( l - f ) / 1000.;
3276 p1tmp += dp * (( Abs( p1 - f ) > Abs( p1 - l )) ? -1. : +1.);
3277 uv = c2d1->Value( p1tmp ).XY();
3278 surf->D1( uv.X(), uv.Y(), p, du, dv );
3280 if ( ++nbLoops > 10 )
3283 cout << "SMESH_MesherHelper::GetAngle(): Captured in a sigularity" << endl;
3288 if ( theFace.Orientation() == TopAbs_REVERSED )
3290 if ( theFaceNormal ) *theFaceNormal = vecRef;
3292 c1->D1( p1, p, vec1 );
3293 c2->D1( p2, p, vec2 );
3294 // TopoDS_Face F = theFace;
3295 // if ( F.Orientation() == TopAbs_INTERNAL )
3296 // F.Orientation( TopAbs_FORWARD );
3297 if ( theE1.Orientation() /*GetSubShapeOri( F, theE1 )*/ == TopAbs_REVERSED )
3299 if ( theE2.Orientation() /*GetSubShapeOri( F, theE2 )*/ == TopAbs_REVERSED )
3301 angle = vec1.AngleWithRef( vec2, vecRef );
3303 if ( Abs ( angle ) >= 0.99 * M_PI )
3305 BRep_Tool::Range( theE1, f, l );
3306 p1 += 1e-7 * ( p1-f < l-p1 ? +1. : -1. );
3307 c1->D1( p1, p, vec1 );
3308 if ( theE1.Orientation() == TopAbs_REVERSED )
3310 BRep_Tool::Range( theE2, f, l );
3311 p2 += 1e-7 * ( p2-f < l-p2 ? +1. : -1. );
3312 c2->D1( p2, p, vec2 );
3313 if ( theE2.Orientation() == TopAbs_REVERSED )
3315 angle = vec1.AngleWithRef( vec2, vecRef );
3324 //================================================================================
3326 * \brief Check if the first and last vertices of an edge are the same
3327 * \param anEdge - the edge to check
3328 * \retval bool - true if same
3330 //================================================================================
3332 bool SMESH_MesherHelper::IsClosedEdge( const TopoDS_Edge& anEdge )
3334 if ( anEdge.Orientation() >= TopAbs_INTERNAL )
3335 return IsClosedEdge( TopoDS::Edge( anEdge.Oriented( TopAbs_FORWARD )));
3336 return TopExp::FirstVertex( anEdge ).IsSame( TopExp::LastVertex( anEdge ));
3339 //================================================================================
3341 * \brief Wrapper over TopExp::FirstVertex() and TopExp::LastVertex() fixing them
3342 * in the case of INTERNAL edge
3344 //================================================================================
3346 TopoDS_Vertex SMESH_MesherHelper::IthVertex( const bool is2nd,
3350 if ( anEdge.Orientation() >= TopAbs_INTERNAL )
3351 anEdge.Orientation( TopAbs_FORWARD );
3353 const TopAbs_Orientation tgtOri = is2nd ? TopAbs_REVERSED : TopAbs_FORWARD;
3354 TopoDS_Iterator vIt( anEdge, CumOri );
3355 while ( vIt.More() && vIt.Value().Orientation() != tgtOri )
3358 return ( vIt.More() ? TopoDS::Vertex(vIt.Value()) : TopoDS_Vertex() );
3361 //================================================================================
3363 * \brief Return type of shape contained in a group
3364 * \param group - a shape of type TopAbs_COMPOUND
3365 * \param avoidCompound - not to return TopAbs_COMPOUND
3367 //================================================================================
3369 TopAbs_ShapeEnum SMESH_MesherHelper::GetGroupType(const TopoDS_Shape& group,
3370 const bool avoidCompound)
3372 if ( !group.IsNull() )
3374 if ( group.ShapeType() != TopAbs_COMPOUND )
3375 return group.ShapeType();
3377 // iterate on a compound
3378 TopoDS_Iterator it( group );
3380 return avoidCompound ? GetGroupType( it.Value() ) : it.Value().ShapeType();
3382 return TopAbs_SHAPE;
3385 //================================================================================
3387 * \brief Returns a shape, to which a hypothesis used to mesh a given shape is assigned
3388 * \param [in] hyp - the hypothesis
3389 * \param [in] shape - the shape, for meshing which the \a hyp is used
3390 * \param [in] mesh - the mesh
3391 * \return TopoDS_Shape - the shape the \a hyp is assigned to
3393 //================================================================================
3395 TopoDS_Shape SMESH_MesherHelper::GetShapeOfHypothesis( const SMESHDS_Hypothesis * hyp,
3396 const TopoDS_Shape& shape,
3399 const SMESH_Hypothesis* h = static_cast<const SMESH_Hypothesis*>( hyp );
3400 SMESH_HypoFilter hypFilter( SMESH_HypoFilter::Is( h ));
3402 TopoDS_Shape shapeOfHyp;
3403 mesh->GetHypothesis( shape, hypFilter, /*checkAncestors=*/true, &shapeOfHyp );
3407 //=======================================================================
3408 //function : IsQuadraticMesh
3409 //purpose : Check mesh without geometry for: if all elements on this shape are quadratic,
3410 // quadratic elements will be created.
3411 // Used then generated 3D mesh without geometry.
3412 //=======================================================================
3414 SMESH_MesherHelper:: MType SMESH_MesherHelper::IsQuadraticMesh()
3416 int NbAllEdgsAndFaces=0;
3417 int NbQuadFacesAndEdgs=0;
3418 int NbFacesAndEdges=0;
3419 //All faces and edges
3420 NbAllEdgsAndFaces = myMesh->NbEdges() + myMesh->NbFaces();
3421 if ( NbAllEdgsAndFaces == 0 )
3422 return SMESH_MesherHelper::LINEAR;
3424 //Quadratic faces and edges
3425 NbQuadFacesAndEdgs = myMesh->NbEdges(ORDER_QUADRATIC) + myMesh->NbFaces(ORDER_QUADRATIC);
3427 //Linear faces and edges
3428 NbFacesAndEdges = myMesh->NbEdges(ORDER_LINEAR) + myMesh->NbFaces(ORDER_LINEAR);
3430 if (NbAllEdgsAndFaces == NbQuadFacesAndEdgs) {
3432 return SMESH_MesherHelper::QUADRATIC;
3434 else if (NbAllEdgsAndFaces == NbFacesAndEdges) {
3436 return SMESH_MesherHelper::LINEAR;
3439 //Mesh with both type of elements
3440 return SMESH_MesherHelper::COMP;
3443 //=======================================================================
3444 //function : GetOtherParam
3445 //purpose : Return an alternative parameter for a node on seam
3446 //=======================================================================
3448 double SMESH_MesherHelper::GetOtherParam(const double param) const
3450 int i = myParIndex & U_periodic ? 0 : 1;
3451 return fabs(param-myPar1[i]) < fabs(param-myPar2[i]) ? myPar2[i] : myPar1[i];
3454 //=======================================================================
3455 //function : NbRealSeam
3456 //purpose : Return a number of real seam edges in the shape set through
3457 // IsQuadraticSubMesh() or SetSubShape(). A real seam edge encounters twice in a wire
3458 //=======================================================================
3460 size_t SMESH_MesherHelper::NbRealSeam() const
3464 std::set< int >::const_iterator id = mySeamShapeIds.begin();
3465 for ( ; id != mySeamShapeIds.end(); ++id )
3466 if ( *id < 0 ) ++nb;
3472 //=======================================================================
3473 //function : IsOnSeam
3474 //purpose : Check if UV is on seam. Return 0 if not, 1 for U seam, 2 for V seam
3475 //=======================================================================
3477 int SMESH_MesherHelper::IsOnSeam(const gp_XY& uv) const
3479 for ( int i = U_periodic; i <= V_periodic ; ++i )
3480 if ( myParIndex & i )
3482 double p = uv.Coord( i );
3483 double tol = ( myPar2[i-1] - myPar1[i-1] ) / 100.;
3484 if ( Abs( p - myPar1[i-1] ) < tol ||
3485 Abs( p - myPar2[i-1] ) < tol )
3493 //=======================================================================
3495 * \brief Iterator on ancestors of the given type
3497 //=======================================================================
3499 struct TAncestorsIterator : public SMDS_Iterator<const TopoDS_Shape*>
3501 TopTools_ListIteratorOfListOfShape _ancIter;
3502 TopAbs_ShapeEnum _type;
3503 TopTools_MapOfShape _encountered;
3504 TopTools_IndexedMapOfShape _allowed;
3505 TAncestorsIterator( const TopTools_ListOfShape& ancestors,
3506 TopAbs_ShapeEnum type,
3507 const TopoDS_Shape* container/* = 0*/)
3508 : _ancIter( ancestors ), _type( type )
3510 if ( container && !container->IsNull() )
3511 TopExp::MapShapes( *container, type, _allowed);
3512 if ( _ancIter.More() ) {
3513 if ( !isCurrentAllowed() ) next();
3514 else _encountered.Add( _ancIter.Value() );
3519 return _ancIter.More();
3521 virtual const TopoDS_Shape* next()
3523 const TopoDS_Shape* s = _ancIter.More() ? & _ancIter.Value() : 0;
3524 if ( _ancIter.More() )
3525 for ( _ancIter.Next(); _ancIter.More(); _ancIter.Next())
3526 if ( isCurrentAllowed() && _encountered.Add( _ancIter.Value() ))
3530 bool isCurrentAllowed()
3532 return (( _ancIter.Value().ShapeType() == _type ) &&
3533 ( _allowed.IsEmpty() || _allowed.Contains( _ancIter.Value() )));
3539 //=======================================================================
3541 * \brief Return iterator on ancestors of the given type, included into a container shape
3543 //=======================================================================
3545 PShapeIteratorPtr SMESH_MesherHelper::GetAncestors(const TopoDS_Shape& shape,
3546 const SMESH_Mesh& mesh,
3547 TopAbs_ShapeEnum ancestorType,
3548 const TopoDS_Shape* container)
3550 return PShapeIteratorPtr
3551 ( new TAncestorsIterator( mesh.GetAncestors(shape), ancestorType, container));
3554 //=======================================================================
3555 //function : GetCommonAncestor
3556 //purpose : Find a common ancestors of two shapes of the given type
3557 //=======================================================================
3559 TopoDS_Shape SMESH_MesherHelper::GetCommonAncestor(const TopoDS_Shape& shape1,
3560 const TopoDS_Shape& shape2,
3561 const SMESH_Mesh& mesh,
3562 TopAbs_ShapeEnum ancestorType)
3564 TopoDS_Shape commonAnc;
3565 if ( !shape1.IsNull() && !shape2.IsNull() )
3567 if ( shape1.ShapeType() == ancestorType && IsSubShape( shape2, shape1 ))
3569 if ( shape2.ShapeType() == ancestorType && IsSubShape( shape1, shape2 ))
3572 PShapeIteratorPtr ancIt = GetAncestors( shape1, mesh, ancestorType );
3573 while ( const TopoDS_Shape* anc = ancIt->next() )
3574 if ( IsSubShape( shape2, *anc ))
3583 //#include <Perf_Meter.hxx>
3585 //=======================================================================
3586 namespace { // Structures used by FixQuadraticElements()
3587 //=======================================================================
3589 #define __DMP__(txt) \
3591 #define MSG(txt) __DMP__(txt<<endl)
3592 #define MSGBEG(txt) __DMP__(txt)
3594 //const double straightTol2 = 1e-33; // to detect straing links
3595 bool isStraightLink(double linkLen2, double middleNodeMove2)
3597 // straight if <node move> < 1/15 * <link length>
3598 return middleNodeMove2 < 1/15./15. * linkLen2;
3602 // ---------------------------------------
3604 * \brief Quadratic link knowing its faces
3606 struct QLink: public SMESH_TLink
3608 const SMDS_MeshNode* _mediumNode;
3609 mutable vector<const QFace* > _faces;
3610 mutable gp_Vec _nodeMove;
3611 mutable int _nbMoves;
3612 mutable bool _is2dFixed; // is moved along surface or in 3D
3614 QLink(const SMDS_MeshNode* n1, const SMDS_MeshNode* n2, const SMDS_MeshNode* nm):
3615 SMESH_TLink( n1,n2 ), _mediumNode(nm), _nodeMove(0,0,0), _nbMoves(0) {
3617 _nodeMove = MediumPnt() - MiddlePnt();
3618 _is2dFixed = ( MediumPos() != SMDS_TOP_FACE );
3620 void SetContinuesFaces() const;
3621 const QFace* GetContinuesFace( const QFace* face ) const;
3622 bool OnBoundary() const;
3623 gp_XYZ MiddlePnt() const { return ( XYZ( node1() ) + XYZ( node2() )) / 2.; }
3624 gp_XYZ MediumPnt() const { return XYZ( _mediumNode ); }
3626 SMDS_TypeOfPosition MediumPos() const
3627 { return _mediumNode->GetPosition()->GetTypeOfPosition(); }
3628 SMDS_TypeOfPosition EndPos(bool isSecond) const
3629 { return (isSecond ? node2() : node1())->GetPosition()->GetTypeOfPosition(); }
3630 const SMDS_MeshNode* EndPosNode(SMDS_TypeOfPosition pos) const
3631 { return EndPos(0) == pos ? node1() : EndPos(1) == pos ? node2() : 0; }
3633 void Move(const gp_Vec& move, bool sum=false, bool is2dFixed=false) const
3634 { _nodeMove += move; _nbMoves += sum ? (_nbMoves==0) : 1; _is2dFixed |= is2dFixed; }
3635 gp_XYZ Move() const { return _nodeMove.XYZ() / _nbMoves; }
3636 bool IsMoved() const { return (_nbMoves > 0 /*&& !IsStraight()*/); }
3637 bool IsFixedOnSurface() const { return _is2dFixed; }
3638 bool IsStraight() const
3639 { return isStraightLink( (XYZ(node1())-XYZ(node2())).SquareModulus(),
3640 _nodeMove.SquareMagnitude());
3642 bool operator<(const QLink& other) const {
3643 return (node1()->GetID() == other.node1()->GetID() ?
3644 node2()->GetID() < other.node2()->GetID() :
3645 node1()->GetID() < other.node1()->GetID());
3647 // struct PtrComparator {
3648 // bool operator() (const QLink* l1, const QLink* l2 ) const { return *l1 < *l2; }
3651 // ---------------------------------------------------------
3653 * \brief Link in the chain of links; it connects two faces
3657 const QLink* _qlink;
3658 mutable const QFace* _qfaces[2];
3660 TChainLink(const QLink* qlink=0):_qlink(qlink) {
3661 _qfaces[0] = _qfaces[1] = 0;
3663 void SetFace(const QFace* face) const { int iF = _qfaces[0] ? 1 : 0; _qfaces[iF]=face; }
3665 bool IsBoundary() const { return !_qfaces[1]; }
3667 void RemoveFace( const QFace* face ) const
3668 { _qfaces[(face == _qfaces[1])] = 0; if (!_qfaces[0]) std::swap(_qfaces[0],_qfaces[1]); }
3670 const QFace* NextFace( const QFace* f ) const
3671 { return _qfaces[0]==f ? _qfaces[1] : _qfaces[0]; }
3673 const SMDS_MeshNode* NextNode( const SMDS_MeshNode* n ) const
3674 { return n == _qlink->node1() ? _qlink->node2() : _qlink->node1(); }
3676 bool operator<(const TChainLink& other) const { return *_qlink < *other._qlink; }
3678 operator bool() const { return (_qlink); }
3680 const QLink* operator->() const { return _qlink; }
3682 gp_Vec Normal() const;
3684 bool IsStraight() const;
3686 // --------------------------------------------------------------------
3687 typedef list< TChainLink > TChain;
3688 typedef set < TChainLink > TLinkSet;
3689 typedef TLinkSet::const_iterator TLinkInSet;
3691 const int theFirstStep = 5;
3693 enum { ERR_OK, ERR_TRI, ERR_PRISM, ERR_UNKNOWN }; // errors of QFace::GetLinkChain()
3694 // --------------------------------------------------------------------
3696 * \brief Quadratic face shared by two volumes and bound by QLinks
3698 struct QFace: public TIDSortedNodeSet
3700 mutable const SMDS_MeshElement* _volumes[2];
3701 mutable vector< const QLink* > _sides;
3702 mutable bool _sideIsAdded[4]; // added in chain of links
3705 mutable const SMDS_MeshElement* _face;
3708 QFace( const vector< const QLink*>& links, const SMDS_MeshElement* face=0 );
3710 void SetVolume(const SMDS_MeshElement* v) const { _volumes[ _volumes[0] ? 1 : 0 ] = v; }
3712 int NbVolumes() const { return !_volumes[0] ? 0 : !_volumes[1] ? 1 : 2; }
3714 void AddSelfToLinks() const {
3715 for ( size_t i = 0; i < _sides.size(); ++i )
3716 _sides[i]->_faces.push_back( this );
3718 int LinkIndex( const QLink* side ) const {
3719 for (size_t i = 0; i<_sides.size(); ++i ) if ( _sides[i] == side ) return i;
3722 bool GetLinkChain( int iSide, TChain& chain, SMDS_TypeOfPosition pos, int& err) const;
3724 bool GetLinkChain( TChainLink& link, TChain& chain, SMDS_TypeOfPosition pos, int& err) const
3726 int i = LinkIndex( link._qlink );
3727 if ( i < 0 ) return true;
3728 _sideIsAdded[i] = true;
3729 link.SetFace( this );
3730 // continue from opposite link
3731 return GetLinkChain( (i+2)%_sides.size(), chain, pos, err );
3733 bool IsBoundary() const { return !_volumes[1]; }
3735 bool Contains( const SMDS_MeshNode* node ) const { return count(node); }
3737 bool IsSpoiled(const QLink* bentLink ) const;
3739 TLinkInSet GetBoundaryLink( const TLinkSet& links,
3740 const TChainLink& avoidLink,
3741 TLinkInSet * notBoundaryLink = 0,
3742 const SMDS_MeshNode* nodeToContain = 0,
3743 bool * isAdjacentUsed = 0,
3744 int nbRecursionsLeft = -1) const;
3746 TLinkInSet GetLinkByNode( const TLinkSet& links,
3747 const TChainLink& avoidLink,
3748 const SMDS_MeshNode* nodeToContain) const;
3750 const SMDS_MeshNode* GetNodeInFace() const {
3751 for ( size_t iL = 0; iL < _sides.size(); ++iL )
3752 if ( _sides[iL]->MediumPos() == SMDS_TOP_FACE ) return _sides[iL]->_mediumNode;
3756 gp_Vec LinkNorm(const int i, SMESH_MesherHelper* theFaceHelper=0) const;
3758 double MoveByBoundary( const TChainLink& theLink,
3759 const gp_Vec& theRefVec,
3760 const TLinkSet& theLinks,
3761 SMESH_MesherHelper* theFaceHelper=0,
3762 const double thePrevLen=0,
3763 const int theStep=theFirstStep,
3764 gp_Vec* theLinkNorm=0,
3765 double theSign=1.0) const;
3768 //================================================================================
3770 * \brief Dump QLink and QFace
3772 ostream& operator << (ostream& out, const QLink& l) // todo: unused in release mode
3774 out <<"QLink nodes: "
3775 << l.node1()->GetID() << " - "
3776 << l._mediumNode->GetID() << " - "
3777 << l.node2()->GetID() << endl;
3780 ostream& operator << (ostream& out, const QFace& f) // todo: unused in release mode
3782 out <<"QFace nodes: "/*<< &f << " "*/;
3783 for ( TIDSortedNodeSet::const_iterator n = f.begin(); n != f.end(); ++n )
3784 out << (*n)->GetID() << " ";
3785 out << " \tvolumes: "
3786 << (f._volumes[0] ? f._volumes[0]->GetID() : 0) << " "
3787 << (f._volumes[1] ? f._volumes[1]->GetID() : 0);
3788 out << " \tNormal: "<< f._normal.X() <<", "<<f._normal.Y() <<", "<<f._normal.Z() << endl;
3792 //================================================================================
3794 * \brief Construct QFace from QLinks
3796 //================================================================================
3798 QFace::QFace( const vector< const QLink*>& links, const SMDS_MeshElement* face )
3800 _volumes[0] = _volumes[1] = 0;
3802 _sideIsAdded[0]=_sideIsAdded[1]=_sideIsAdded[2]=_sideIsAdded[3]=false;
3803 _normal.SetCoord(0,0,0);
3804 for ( size_t i = 1; i < _sides.size(); ++i ) {
3805 const QLink *l1 = _sides[i-1], *l2 = _sides[i];
3806 insert( l1->node1() ); insert( l1->node2() );
3808 gp_Vec v1( XYZ( l1->node2()), XYZ( l1->node1()));
3809 gp_Vec v2( XYZ( l2->node1()), XYZ( l2->node2()));
3810 if ( l1->node1() != l2->node1() && l1->node2() != l2->node2() )
3814 double normSqSize = _normal.SquareMagnitude();
3815 if ( normSqSize > numeric_limits<double>::min() )
3816 _normal /= sqrt( normSqSize );
3818 _normal.SetCoord(1e-33,0,0);
3823 (void)face; // unused in release mode
3825 //================================================================================
3827 * \brief Make up a chain of links
3828 * \param iSide - link to add first
3829 * \param chain - chain to fill in
3830 * \param pos - position of medium nodes the links should have
3831 * \param error - out, specifies what is wrong
3832 * \retval bool - false if valid chain can't be built; "valid" means that links
3833 * of the chain belongs to rectangles bounding hexahedrons
3835 //================================================================================
3837 bool QFace::GetLinkChain( int iSide, TChain& chain, SMDS_TypeOfPosition pos, int& error) const
3839 if ( iSide >= (int)_sides.size() ) // wrong argument iSide
3841 if ( _sideIsAdded[ iSide ]) // already in chain
3844 if ( _sides.size() != 4 ) { // triangle - visit all my continuous faces
3847 list< const QFace* > faces( 1, this );
3848 while ( !faces.empty() ) {
3849 const QFace* face = faces.front();
3850 for ( size_t i = 0; i < face->_sides.size(); ++i ) {
3851 if ( !face->_sideIsAdded[i] && face->_sides[i] ) {
3852 face->_sideIsAdded[i] = true;
3853 // find a face side in the chain
3854 TLinkInSet chLink = links.insert( TChainLink(face->_sides[i])).first;
3855 // TChain::iterator chLink = chain.begin();
3856 // for ( ; chLink != chain.end(); ++chLink )
3857 // if ( chLink->_qlink == face->_sides[i] )
3859 // if ( chLink == chain.end() )
3860 // chLink = chain.insert( chain.begin(), TChainLink(face->_sides[i]));
3861 // add a face to a chained link and put a continues face in the queue
3862 chLink->SetFace( face );
3863 if ( face->_sides[i]->MediumPos() == pos )
3864 if ( const QFace* contFace = face->_sides[i]->GetContinuesFace( face ))
3865 if ( contFace->_sides.size() == 3 )
3866 faces.push_back( contFace );
3871 if ( error < ERR_TRI )
3873 chain.insert( chain.end(), links.begin(),links.end() );
3876 _sideIsAdded[iSide] = true; // not to add this link to chain again
3877 const QLink* link = _sides[iSide];
3881 // add link into chain
3882 TChain::iterator chLink = chain.insert( chain.begin(), TChainLink(link));
3883 chLink->SetFace( this );
3886 // propagate from a quadrangle to neighbour faces
3887 if ( link->MediumPos() >= pos ) {
3888 int nbLinkFaces = link->_faces.size();
3889 if ( nbLinkFaces == 4 || (/*nbLinkFaces < 4 && */link->OnBoundary())) {
3890 // hexahedral mesh or boundary quadrangles - goto a continuous face
3891 if ( const QFace* f = link->GetContinuesFace( this ))
3892 if ( f->_sides.size() == 4 )
3893 return f->GetLinkChain( *chLink, chain, pos, error );
3896 TChainLink chLink(link); // side face of prismatic mesh - visit all faces of iSide
3897 for ( int i = 0; i < nbLinkFaces; ++i )
3898 if ( link->_faces[i] )
3899 link->_faces[i]->GetLinkChain( chLink, chain, pos, error );
3900 if ( error < ERR_PRISM )
3908 //================================================================================
3910 * \brief Return a boundary link of the triangle face
3911 * \param links - set of all links
3912 * \param avoidLink - link not to return
3913 * \param notBoundaryLink - out, neither the returned link nor avoidLink
3914 * \param nodeToContain - node the returned link must contain; if provided, search
3915 * also performed on adjacent faces
3916 * \param isAdjacentUsed - returns true if link is found in adjacent faces
3917 * \param nbRecursionsLeft - to limit recursion
3919 //================================================================================
3921 TLinkInSet QFace::GetBoundaryLink( const TLinkSet& links,
3922 const TChainLink& avoidLink,
3923 TLinkInSet * notBoundaryLink,
3924 const SMDS_MeshNode* nodeToContain,
3925 bool * isAdjacentUsed,
3926 int nbRecursionsLeft) const
3928 TLinkInSet linksEnd = links.end(), boundaryLink = linksEnd;
3930 typedef list< pair< const QFace*, TLinkInSet > > TFaceLinkList;
3931 TFaceLinkList adjacentFaces;
3933 for ( size_t iL = 0; iL < _sides.size(); ++iL )
3935 if ( avoidLink._qlink == _sides[iL] )
3937 TLinkInSet link = links.find( _sides[iL] );
3938 if ( link == linksEnd ) continue;
3939 if ( (*link)->MediumPos() > SMDS_TOP_FACE )
3940 continue; // We work on faces here, don't go inside a solid
3943 if ( link->IsBoundary() ) {
3944 if ( !nodeToContain ||
3945 (*link)->node1() == nodeToContain ||
3946 (*link)->node2() == nodeToContain )
3948 boundaryLink = link;
3949 if ( !notBoundaryLink ) break;
3952 else if ( notBoundaryLink ) {
3953 *notBoundaryLink = link;
3954 if ( boundaryLink != linksEnd ) break;
3957 if ( boundaryLink == linksEnd && nodeToContain ) // collect adjacent faces
3958 if ( const QFace* adj = link->NextFace( this ))
3959 if ( adj->Contains( nodeToContain ))
3960 adjacentFaces.push_back( make_pair( adj, link ));
3963 if ( isAdjacentUsed ) *isAdjacentUsed = false;
3964 if ( boundaryLink == linksEnd && nodeToContain && nbRecursionsLeft) // check adjacent faces
3966 if ( nbRecursionsLeft < 0 )
3967 nbRecursionsLeft = nodeToContain->NbInverseElements();
3968 TFaceLinkList::iterator adj = adjacentFaces.begin();
3969 for ( ; boundaryLink == linksEnd && adj != adjacentFaces.end(); ++adj )
3970 boundaryLink = adj->first->GetBoundaryLink( links, *(adj->second), 0, nodeToContain,
3971 isAdjacentUsed, nbRecursionsLeft-1);
3972 if ( isAdjacentUsed ) *isAdjacentUsed = true;
3974 return boundaryLink;
3976 //================================================================================
3978 * \brief Return a link ending at the given node but not avoidLink
3980 //================================================================================
3982 TLinkInSet QFace::GetLinkByNode( const TLinkSet& links,
3983 const TChainLink& avoidLink,
3984 const SMDS_MeshNode* nodeToContain) const
3986 for ( size_t i = 0; i < _sides.size(); ++i )
3987 if ( avoidLink._qlink != _sides[i] &&
3988 (_sides[i]->node1() == nodeToContain || _sides[i]->node2() == nodeToContain ))
3989 return links.find( _sides[i] );
3993 //================================================================================
3995 * \brief Return normal to the i-th side pointing outside the face
3997 //================================================================================
3999 gp_Vec QFace::LinkNorm(const int i, SMESH_MesherHelper* /*uvHelper*/) const
4001 gp_Vec norm = _normal ^ gp_Vec( XYZ(_sides[i]->node1()), XYZ(_sides[i]->node2()));
4002 gp_XYZ pIn = ( _sides[ (i+1)%3 ]->MiddlePnt() +
4003 _sides[ (i+2)%3 ]->MiddlePnt() ) / 2.;
4004 gp_Vec vecOut = ( _sides[i]->MiddlePnt() - pIn );
4006 if ( norm * vecOut < 0 )
4008 double mag2 = norm.SquareMagnitude();
4009 if ( mag2 > numeric_limits<double>::min() )
4010 norm /= sqrt( mag2 );
4013 //================================================================================
4015 * \brief Move medium node of theLink according to its distance from boundary
4016 * \param theLink - link to fix
4017 * \param theRefVec - movement of boundary
4018 * \param theLinks - all adjacent links of continuous triangles
4019 * \param theFaceHelper - helper is not used so far
4020 * \param thePrevLen - distance from the boundary
4021 * \param theStep - number of steps till movement propagation limit
4022 * \param theLinkNorm - out normal to theLink
4023 * \param theSign - 1 or -1 depending on movement of boundary
4024 * \retval double - distance from boundary to propagation limit or other boundary
4026 //================================================================================
4028 double QFace::MoveByBoundary( const TChainLink& theLink,
4029 const gp_Vec& theRefVec,
4030 const TLinkSet& theLinks,
4031 SMESH_MesherHelper* theFaceHelper,
4032 const double thePrevLen,
4034 gp_Vec* theLinkNorm,
4035 double theSign) const
4038 return thePrevLen; // propagation limit reached
4040 size_t iL; // index of theLink
4041 for ( iL = 0; iL < _sides.size(); ++iL )
4042 if ( theLink._qlink == _sides[ iL ])
4045 MSG(string(theStep,'.')<<" Ref( "<<theRefVec.X()<<","<<theRefVec.Y()<<","<<theRefVec.Z()<<" )"
4046 <<" thePrevLen " << thePrevLen);
4047 MSG(string(theStep,'.')<<" "<<*theLink._qlink);
4049 gp_Vec linkNorm = -LinkNorm( iL/*, theFaceHelper*/ ); // normal to theLink
4050 double refProj = theRefVec * linkNorm; // project movement vector to normal of theLink
4051 if ( theStep == theFirstStep )
4052 theSign = refProj < 0. ? -1. : 1.;
4053 else if ( theSign * refProj < 0.4 * theRefVec.Magnitude())
4054 return thePrevLen; // to propagate movement forward only, not in side dir or backward
4056 int iL1 = (iL + 1) % 3, iL2 = (iL + 2) % 3; // indices of the two other links of triangle
4057 TLinkInSet link1 = theLinks.find( _sides[iL1] );
4058 TLinkInSet link2 = theLinks.find( _sides[iL2] );
4060 const QFace *f1 = 0, *f2 = 0; // adjacent faces
4061 bool isBndLink1 = true, isBndLink2 = true;
4062 if ( link1 != theLinks.end() && link2 != theLinks.end() )
4064 f1 = link1->NextFace( this );
4065 f2 = link2->NextFace( this );
4067 isBndLink1 = ( theLink->MediumPos() > (*link1)->MediumPos() );
4068 isBndLink2 = ( theLink->MediumPos() > (*link2)->MediumPos() );
4069 if ( theStep == theFirstStep ) // (issue 22541) quad-dominant mesh
4071 if ( !isBndLink1 && !f1 )
4072 f1 = (*link1)->GetContinuesFace( this ); // get a quadrangle face
4073 if ( !isBndLink2 && !f2 )
4074 f2 = (*link2)->GetContinuesFace( this );
4077 else if ( _sides.size() < 4 )
4080 // propagate to adjacent faces till limit step or boundary
4081 double len1 = thePrevLen + (theLink->MiddlePnt() - _sides[iL1]->MiddlePnt()).Modulus();
4082 double len2 = thePrevLen + (theLink->MiddlePnt() - _sides[iL2]->MiddlePnt()).Modulus();
4083 gp_Vec linkDir1(0,0,0); // initialize to avoid valgrind error ("Conditional jump...")
4084 gp_Vec linkDir2(0,0,0);
4087 if ( f1 && !isBndLink1 )
4088 len1 = f1->MoveByBoundary
4089 ( *link1, theRefVec, theLinks, theFaceHelper, len1, theStep-1, &linkDir1, theSign);
4091 linkDir1 = LinkNorm( iL1/*, theFaceHelper*/ );
4093 MSG( " --------------- EXCEPTION");
4098 if ( f2 && !isBndLink2 )
4099 len2 = f2->MoveByBoundary
4100 ( *link2, theRefVec, theLinks, theFaceHelper, len2, theStep-1, &linkDir2, theSign);
4102 linkDir2 = LinkNorm( iL2/*, theFaceHelper*/ );
4104 MSG( " --------------- EXCEPTION");
4109 if ( theStep != theFirstStep )
4111 // choose chain length by direction of propagation most codirected with theRefVec
4112 bool choose1 = ( theRefVec * linkDir1 * theSign > theRefVec * linkDir2 * theSign );
4113 fullLen = choose1 ? len1 : len2;
4114 double r = thePrevLen / fullLen;
4116 gp_Vec move = linkNorm * refProj * ( 1 - r );
4117 theLink->Move( move, /*sum=*/true );
4119 MSG(string(theStep,'.')<<" Move "<< theLink->_mediumNode->GetID()<<
4120 " by " << refProj * ( 1 - r ) << " following " <<
4121 (choose1 ? *link1->_qlink : *link2->_qlink)); // warning: link1 can be invalid
4123 if ( theLinkNorm ) *theLinkNorm = linkNorm;
4128 //================================================================================
4130 * \brief Checks if the face is distorted due to bentLink
4132 //================================================================================
4134 bool QFace::IsSpoiled(const QLink* bentLink ) const // todo: unused
4136 // code is valid for convex faces only
4138 for ( TIDSortedNodeSet::const_iterator n = begin(); n != end(); ++n )
4139 gc += XYZ( *n ) / double( size() );
4140 for ( size_t i = 0; i < _sides.size(); ++i )
4142 if ( _sides[i] == bentLink ) continue;
4143 gp_Vec linkNorm = _normal ^ gp_Vec( XYZ(_sides[i]->node1()), XYZ(_sides[i]->node2()));
4144 gp_Vec vecOut( gc, _sides[i]->MiddlePnt() );
4145 if ( linkNorm * vecOut < 0 )
4147 double mag2 = linkNorm.SquareMagnitude();
4148 if ( mag2 > numeric_limits<double>::min() )
4149 linkNorm /= sqrt( mag2 );
4150 gp_Vec vecBent ( _sides[i]->MiddlePnt(), bentLink->MediumPnt());
4151 gp_Vec vecStraight( _sides[i]->MiddlePnt(), bentLink->MiddlePnt());
4152 if ( vecBent * linkNorm > -0.1*vecStraight.Magnitude() )
4159 //================================================================================
4161 * \brief Find pairs of continues faces
4163 //================================================================================
4165 void QLink::SetContinuesFaces() const
4167 // x0 x - QLink, [-|] - QFace, v - volume
4169 // | Between _faces of link x2 two vertical faces are continues
4170 // x1----x2-----x3 and two horizontal faces are continues. We set vertical faces
4171 // | to _faces[0] and _faces[1] and horizontal faces to
4172 // v2 | v3 _faces[2] and _faces[3] (or vice versa).
4175 if ( _faces.empty() )
4177 int iFaceCont = -1, nbBoundary = 0, iBoundary[2]={-1,-1};
4178 if ( _faces[0]->IsBoundary() )
4179 iBoundary[ nbBoundary++ ] = 0;
4180 for ( size_t iF = 1; iFaceCont < 0 && iF < _faces.size(); ++iF )
4182 // look for a face bounding none of volumes bound by _faces[0]
4183 bool sameVol = false;
4184 int nbVol = _faces[iF]->NbVolumes();
4185 for ( int iV = 0; !sameVol && iV < nbVol; ++iV )
4186 sameVol = ( _faces[iF]->_volumes[iV] == _faces[0]->_volumes[0] ||
4187 _faces[iF]->_volumes[iV] == _faces[0]->_volumes[1]);
4190 if ( _faces[iF]->IsBoundary() )
4191 iBoundary[ nbBoundary++ ] = iF;
4193 // Set continues faces: arrange _faces to have
4194 // _faces[0] continues to _faces[1]
4195 // _faces[2] continues to _faces[3]
4196 if ( nbBoundary == 2 ) // bnd faces are continues
4198 if (( iBoundary[0] < 2 ) != ( iBoundary[1] < 2 ))
4200 int iNear0 = iBoundary[0] < 2 ? 1-iBoundary[0] : 5-iBoundary[0];
4201 std::swap( _faces[ iBoundary[1] ], _faces[iNear0] );
4204 else if ( iFaceCont > 0 ) // continues faces found
4206 if ( iFaceCont != 1 )
4207 std::swap( _faces[1], _faces[iFaceCont] );
4209 else if ( _faces.size() > 1 ) // not found, set NULL by the first face
4211 _faces.insert( ++_faces.begin(), (QFace*) 0 );
4214 //================================================================================
4216 * \brief Return a face continues to the given one
4218 //================================================================================
4220 const QFace* QLink::GetContinuesFace( const QFace* face ) const
4222 if ( _faces.size() <= 4 )
4223 for ( size_t i = 0; i < _faces.size(); ++i ) {
4224 if ( _faces[i] == face ) {
4225 int iF = i < 2 ? 1-i : 5-i;
4226 return iF < (int)_faces.size() ? _faces[iF] : 0;
4231 //================================================================================
4233 * \brief True if link is on mesh boundary
4235 //================================================================================
4237 bool QLink::OnBoundary() const
4239 for ( size_t i = 0; i < _faces.size(); ++i )
4240 if (_faces[i] && _faces[i]->IsBoundary()) return true;
4243 //================================================================================
4245 * \brief Return normal of link of the chain
4247 //================================================================================
4249 gp_Vec TChainLink::Normal() const {
4251 if (_qfaces[0]) norm = _qfaces[0]->_normal;
4252 if (_qfaces[1]) norm += _qfaces[1]->_normal;
4255 //================================================================================
4257 * \brief Test link curvature taking into account size of faces
4259 //================================================================================
4261 bool TChainLink::IsStraight() const
4263 bool isStraight = _qlink->IsStraight();
4264 if ( isStraight && _qfaces[0] && !_qfaces[1] )
4266 int i = _qfaces[0]->LinkIndex( _qlink );
4267 int iOpp = ( i + 2 ) % _qfaces[0]->_sides.size();
4268 gp_XYZ mid1 = _qlink->MiddlePnt();
4269 gp_XYZ mid2 = _qfaces[0]->_sides[ iOpp ]->MiddlePnt();
4270 double faceSize2 = (mid1-mid2).SquareModulus();
4271 isStraight = _qlink->_nodeMove.SquareMagnitude() < 1/10./10. * faceSize2;
4276 //================================================================================
4278 * \brief Move medium nodes of vertical links of pentahedrons adjacent by side faces
4280 //================================================================================
4282 void fixPrism( TChain& allLinks )
4284 // separate boundary links from internal ones
4285 typedef set<const QLink*/*, QLink::PtrComparator*/> QLinkSet;
4286 QLinkSet interLinks, bndLinks1, bndLink2;
4288 bool isCurved = false;
4289 for ( TChain::iterator lnk = allLinks.begin(); lnk != allLinks.end(); ++lnk ) {
4290 if ( (*lnk)->OnBoundary() )
4291 bndLinks1.insert( lnk->_qlink );
4293 interLinks.insert( lnk->_qlink );
4294 isCurved = isCurved || !lnk->IsStraight();
4297 return; // no need to move
4299 QLinkSet *curBndLinks = &bndLinks1, *newBndLinks = &bndLink2;
4301 while ( !interLinks.empty() && !curBndLinks->empty() )
4303 // propagate movement from boundary links to connected internal links
4304 QLinkSet::iterator bnd = curBndLinks->begin(), bndEnd = curBndLinks->end();
4305 for ( ; bnd != bndEnd; ++bnd )
4307 const QLink* bndLink = *bnd;
4308 for ( size_t i = 0; i < bndLink->_faces.size(); ++i ) // loop on faces of bndLink
4310 const QFace* face = bndLink->_faces[i]; // quadrange lateral face of a prism
4311 if ( !face ) continue;
4312 // find and move internal link opposite to bndLink within the face
4313 int interInd = ( face->LinkIndex( bndLink ) + 2 ) % face->_sides.size();
4314 const QLink* interLink = face->_sides[ interInd ];
4315 QLinkSet::iterator pInterLink = interLinks.find( interLink );
4316 if ( pInterLink == interLinks.end() ) continue; // not internal link
4317 interLink->Move( bndLink->_nodeMove );
4318 // treated internal links become new boundary ones
4319 interLinks.erase( pInterLink );
4320 newBndLinks->insert( interLink );
4323 curBndLinks->clear();
4324 std::swap( curBndLinks, newBndLinks );
4328 //================================================================================
4330 * \brief Fix links of continues triangles near curved boundary
4332 //================================================================================
4334 void fixTriaNearBoundary( TChain & allLinks, SMESH_MesherHelper& /*helper*/)
4336 if ( allLinks.empty() ) return;
4338 TLinkSet linkSet( allLinks.begin(), allLinks.end());
4339 TLinkInSet linkIt = linkSet.begin(), linksEnd = linkSet.end();
4341 for ( linkIt = linkSet.begin(); linkIt != linksEnd; ++linkIt)
4343 if ( linkIt->IsBoundary() && !linkIt->IsStraight() && linkIt->_qfaces[0])
4345 // move iff a boundary link is bent towards inside of a face (issue 0021084)
4346 const QFace* face = linkIt->_qfaces[0];
4347 gp_XYZ pIn = ( face->_sides[0]->MiddlePnt() +
4348 face->_sides[1]->MiddlePnt() +
4349 face->_sides[2]->MiddlePnt() ) / 3.;
4350 gp_XYZ insideDir( pIn - (*linkIt)->MiddlePnt());
4351 bool linkBentInside = ((*linkIt)->_nodeMove.Dot( insideDir ) > 0 );
4352 //if ( face->IsSpoiled( linkIt->_qlink ))
4353 if ( linkBentInside )
4354 face->MoveByBoundary( *linkIt, (*linkIt)->_nodeMove, linkSet );
4359 //================================================================================
4361 * \brief Detect rectangular structure of links and build chains from them
4363 //================================================================================
4365 enum TSplitTriaResult {
4366 _OK, _NO_CORNERS, _FEW_ROWS, _MANY_ROWS, _NO_SIDELINK, _BAD_MIDQUAD, _NOT_RECT,
4367 _NO_MIDQUAD, _NO_UPTRIA, _BAD_SET_SIZE, _BAD_CORNER, _BAD_START, _NO_BOTLINK, _TWISTED_CHAIN };
4369 TSplitTriaResult splitTrianglesIntoChains( TChain & allLinks,
4370 vector< TChain> & resultChains,
4371 SMDS_TypeOfPosition pos )
4373 // put links in the set and evaluate number of result chains by number of boundary links
4375 size_t nbBndLinks = 0;
4376 for ( TChain::iterator lnk = allLinks.begin(); lnk != allLinks.end(); ++lnk ) {
4377 linkSet.insert( *lnk );
4378 nbBndLinks += lnk->IsBoundary();
4380 resultChains.clear();
4381 resultChains.reserve( nbBndLinks / 2 );
4383 TLinkInSet linkIt, linksEnd = linkSet.end();
4385 // find a boundary link with corner node; corner node has position pos-2
4386 // i.e. SMDS_TOP_VERTEX for links on faces and SMDS_TOP_EDGE for
4388 SMDS_TypeOfPosition cornerPos = SMDS_TypeOfPosition(pos-2);
4389 const SMDS_MeshNode* corner = 0;
4390 for ( linkIt = linkSet.begin(); linkIt != linksEnd; ++linkIt )
4391 if ( linkIt->IsBoundary() && (corner = (*linkIt)->EndPosNode(cornerPos)))
4396 TLinkInSet startLink = linkIt;
4397 const SMDS_MeshNode* startCorner = corner;
4398 vector< TChain* > rowChains;
4401 while ( startLink != linksEnd) // loop on columns
4403 // We suppose we have a rectangular structure like shown here. We have found a
4404 // corner of the rectangle (startCorner) and a boundary link sharing
4405 // |/ |/ | the startCorner (startLink). We are going to loop on rows of the
4406 // --o---o---o structure making several chains at once. One chain (columnChain)
4407 // |\ | /| starts at startLink and continues upward (we look at the structure
4408 // \ | \ | / | from such point that startLink is on the bottom of the structure).
4409 // \| \|/ | While going upward we also fill horizontal chains (rowChains) we
4410 // --o---o---o encounter.
4412 // / | \ | \ | startCorner
4417 if ( resultChains.size() == nbBndLinks / 2 )
4419 resultChains.push_back( TChain() );
4420 TChain& columnChain = resultChains.back();
4422 TLinkInSet botLink = startLink; // current horizontal link to go up from
4423 corner = startCorner; // current corner the botLink ends at
4425 while ( botLink != linksEnd ) // loop on rows
4427 // add botLink to the columnChain
4428 columnChain.push_back( *botLink );
4430 const QFace* botTria = botLink->_qfaces[0]; // bottom triangle bound by botLink
4432 { // the column ends
4433 if ( botLink == startLink )
4434 return _TWISTED_CHAIN; // issue 0020951
4435 linkSet.erase( botLink );
4436 if ( iRow != rowChains.size() )
4437 return _FEW_ROWS; // different nb of rows in columns
4440 // find the link dividing the quadrangle (midQuadLink) and vertical boundary
4441 // link ending at <corner> (sideLink); there are two cases:
4442 // 1) midQuadLink does not end at <corner>, then we easily find it by botTria,
4443 // since midQuadLink is not at boundary while sideLink is.
4444 // 2) midQuadLink ends at <corner>
4446 TLinkInSet midQuadLink = linksEnd;
4447 TLinkInSet sideLink = botTria->GetBoundaryLink( linkSet, *botLink, &midQuadLink,
4449 if ( isCase2 ) { // find midQuadLink among links of botTria
4450 midQuadLink = botTria->GetLinkByNode( linkSet, *botLink, corner );
4451 if ( midQuadLink->IsBoundary() )
4452 return _BAD_MIDQUAD;
4454 if ( sideLink == linksEnd || midQuadLink == linksEnd || sideLink == midQuadLink )
4455 return sideLink == linksEnd ? _NO_SIDELINK : _NO_MIDQUAD;
4458 columnChain.push_back( *midQuadLink );
4459 if ( iRow >= rowChains.size() ) {
4461 return _MANY_ROWS; // different nb of rows in columns
4462 if ( resultChains.size() == nbBndLinks / 2 )
4464 resultChains.push_back( TChain() );
4465 rowChains.push_back( & resultChains.back() );
4467 rowChains[iRow]->push_back( *sideLink );
4468 rowChains[iRow]->push_back( *midQuadLink );
4470 const QFace* upTria = midQuadLink->NextFace( botTria ); // upper tria of the rectangle
4474 // prepare startCorner and startLink for the next column
4475 startCorner = startLink->NextNode( startCorner );
4477 startLink = botTria->GetBoundaryLink( linkSet, *botLink, 0, startCorner );
4479 startLink = upTria->GetBoundaryLink( linkSet, *midQuadLink, 0, startCorner );
4480 // check if no more columns remains
4481 if ( startLink != linksEnd ) {
4482 const SMDS_MeshNode* botNode = startLink->NextNode( startCorner );
4483 if ( (isCase2 ? botTria : upTria)->Contains( botNode ))
4484 startLink = linksEnd; // startLink bounds upTria or botTria
4485 else if ( startLink == botLink || startLink == midQuadLink || startLink == sideLink )
4489 // find bottom link and corner for the next row
4490 corner = sideLink->NextNode( corner );
4491 // next bottom link ends at the new corner
4492 linkSet.erase( botLink );
4493 botLink = upTria->GetLinkByNode( linkSet, (isCase2 ? *sideLink : *midQuadLink), corner );
4494 if ( botLink == linksEnd || botLink == midQuadLink || botLink == sideLink)
4496 if ( midQuadLink == startLink || sideLink == startLink )
4497 return _TWISTED_CHAIN; // issue 0020951
4498 linkSet.erase( midQuadLink );
4499 linkSet.erase( sideLink );
4501 // make faces neighboring the found ones be boundary
4502 if ( startLink != linksEnd ) {
4503 const QFace* tria = isCase2 ? botTria : upTria;
4504 for ( int iL = 0; iL < 3; ++iL ) {
4505 linkIt = linkSet.find( tria->_sides[iL] );
4506 if ( linkIt != linksEnd )
4507 linkIt->RemoveFace( tria );
4510 if ( botLink->_qfaces[0] == upTria || botLink->_qfaces[1] == upTria )
4511 botLink->RemoveFace( upTria ); // make next botTria first in vector
4518 // In the linkSet, there must remain the last links of rowChains; add them
4519 if ( linkSet.size() != rowChains.size() )
4520 return _BAD_SET_SIZE;
4521 for ( size_t iRow = 0; iRow < rowChains.size(); ++iRow ) {
4522 // find the link (startLink) ending at startCorner
4524 for ( startLink = linkSet.begin(); startLink != linksEnd; ++startLink ) {
4525 if ( (*startLink)->node1() == startCorner ) {
4526 corner = (*startLink)->node2(); break;
4528 else if ( (*startLink)->node2() == startCorner) {
4529 corner = (*startLink)->node1(); break;
4532 if ( startLink == linksEnd )
4534 rowChains[ iRow ]->push_back( *startLink );
4535 linkSet.erase( startLink );
4536 startCorner = corner;
4542 //================================================================================
4544 * \brief Place medium nodes at the link middle for elements whose corner nodes
4545 * are out of geometrical boundary to prevent distorting elements.
4546 * Issue 0020982, note 0013990
4548 //================================================================================
4550 void force3DOutOfBoundary( SMESH_MesherHelper& theHelper,
4551 SMESH_ComputeErrorPtr& theError)
4553 SMESHDS_Mesh* meshDS = theHelper.GetMeshDS();
4554 TopoDS_Shape shape = theHelper.GetSubShape().Oriented( TopAbs_FORWARD );
4555 if ( shape.IsNull() ) return;
4557 if ( !dynamic_cast<SMESH_BadInputElements*>( theError.get() ))
4560 theError.reset( new SMESH_BadInputElements( meshDS ));
4562 theError.reset( new SMESH_BadInputElements( meshDS,
4564 theError->myComment,
4569 if ( shape.ShapeType() == TopAbs_FACE ) // 2D
4571 if ( theHelper.GetMesh()->NbTriangles( ORDER_QUADRATIC ) < 1 ) return;
4573 SMESHDS_SubMesh* faceSM = meshDS->MeshElements( shape );
4574 if ( !faceSM ) return;
4576 const TopoDS_Face& face = TopoDS::Face( shape );
4577 Handle(Geom_Surface) surface = BRep_Tool::Surface( face );
4579 TopExp_Explorer edgeIt( face, TopAbs_EDGE );
4580 for ( ; edgeIt.More(); edgeIt.Next() ) // loop on EDGEs of a FACE
4582 // check if the EDGE needs checking
4583 const TopoDS_Edge& edge = TopoDS::Edge( edgeIt.Current() );
4584 if ( SMESH_Algo::isDegenerated( edge ) )
4586 if ( theHelper.IsRealSeam( edge ) &&
4587 edge.Orientation() == TopAbs_REVERSED )
4590 SMESHDS_SubMesh* edgeSM = meshDS->MeshElements( edge );
4591 if ( !edgeSM ) continue;
4594 Handle(Geom2d_Curve) pcurve = BRep_Tool::CurveOnSurface( edge, face, f, l );
4595 BRepAdaptor_Curve curve3D( edge );
4596 switch ( curve3D.GetType() ) {
4597 case GeomAbs_Line: continue;
4598 case GeomAbs_Circle:
4599 case GeomAbs_Ellipse:
4600 case GeomAbs_Hyperbola:
4601 case GeomAbs_Parabola:
4604 gp_Vec D1, D2, Du1, Dv1; gp_Pnt p;
4605 curve3D.D2( 0.5 * ( f + l ), p, D1, D2 );
4606 gp_Pnt2d uv = pcurve->Value( 0.5 * ( f + l ) );
4607 surface->D1( uv.X(), uv.Y(), p, Du1, Dv1 );
4608 gp_Vec fNorm = Du1 ^ Dv1;
4609 if ( fNorm.IsParallel( D2, M_PI * 25./180. ))
4610 continue; // face is normal to the curve3D
4612 gp_Vec curvNorm = fNorm ^ D1;
4613 if ( edge.Orientation() == TopAbs_REVERSED ) curvNorm.Reverse();
4614 if ( curvNorm * D2 > 0 )
4615 continue; // convex edge
4617 catch ( Standard_Failure& )
4623 // get nodes shared by faces that may be distorted
4624 SMDS_NodeIteratorPtr nodeIt;
4625 if ( edgeSM->NbNodes() > 0 ) {
4626 nodeIt = edgeSM->GetNodes();
4629 SMESHDS_SubMesh* vertexSM = meshDS->MeshElements( theHelper.IthVertex( 0, edge ));
4631 vertexSM = meshDS->MeshElements( theHelper.IthVertex( 1, edge ));
4632 if ( !vertexSM ) continue;
4633 nodeIt = vertexSM->GetNodes();
4636 // find suspicious faces
4637 TIDSortedElemSet checkedFaces;
4638 vector< const SMDS_MeshNode* > nOnEdge( 2 );
4639 const SMDS_MeshNode* nOnFace;
4640 while ( nodeIt->more() )
4642 const SMDS_MeshNode* n = nodeIt->next();
4643 SMDS_ElemIteratorPtr faceIt = n->GetInverseElementIterator( SMDSAbs_Face );
4644 while ( faceIt->more() )
4646 const SMDS_MeshElement* f = faceIt->next();
4647 if ( !faceSM->Contains( f ) ||
4648 f->NbNodes() < 6 || // check quadratic triangles only
4650 !checkedFaces.insert( f ).second )
4653 // get nodes on EDGE and on FACE of a suspicious face
4654 nOnEdge.clear(); nOnFace = 0;
4655 SMDS_MeshElement::iterator triNode = f->begin_nodes();
4656 for ( int nbN = 0; nbN < 3; ++triNode, ++nbN )
4659 if ( n->GetPosition()->GetDim() == 2 )
4662 nOnEdge.push_back( n );
4665 // check if nOnFace is inside the FACE
4666 if ( nOnFace && nOnEdge.size() == 2 )
4668 theHelper.AddTLinks( static_cast< const SMDS_MeshFace* > ( f ));
4669 if ( !SMESH_MeshAlgos::FaceNormal( f, faceNorm, /*normalized=*/false ))
4671 gp_XYZ edgeDir = SMESH_TNodeXYZ( nOnEdge[0] ) - SMESH_TNodeXYZ( nOnEdge[1] );
4672 gp_XYZ edgeNorm = faceNorm ^ edgeDir;
4673 n = theHelper.GetMediumNode( nOnEdge[0], nOnEdge[1], true ); // find n, not create
4674 gp_XYZ pN0 = SMESH_TNodeXYZ( nOnEdge[0] );
4675 gp_XYZ pMedium = SMESH_TNodeXYZ( n ); // on-edge node location
4676 gp_XYZ pFaceN = SMESH_TNodeXYZ( nOnFace ); // on-face node location
4677 double hMedium = edgeNorm * gp_Vec( pN0, pMedium ).XYZ();
4678 double hFace = edgeNorm * gp_Vec( pN0, pFaceN ).XYZ();
4679 if ( Abs( hMedium ) > Abs( hFace * 0.6 ))
4681 // nOnFace is out of FACE, move a medium on-edge node to the middle
4682 gp_XYZ pMid3D = 0.5 * ( pN0 + SMESH_TNodeXYZ( nOnEdge[1] ));
4683 meshDS->MoveNode( n, pMid3D.X(), pMid3D.Y(), pMid3D.Z() );
4684 MSG( "move OUT of face " << n );
4685 static_cast<SMESH_BadInputElements*>( theError.get() )->add( f );
4691 if ( theError->HasBadElems() )
4692 theError->myName = EDITERR_NO_MEDIUM_ON_GEOM;
4695 } // 2D ==============================================================================
4697 if ( shape.ShapeType() == TopAbs_SOLID ) // 3D
4699 if ( theHelper.GetMesh()->NbTetras ( ORDER_QUADRATIC ) < 1 &&
4700 theHelper.GetMesh()->NbPyramids( ORDER_QUADRATIC ) < 1 ) return;
4702 SMESHDS_SubMesh* solidSM = meshDS->MeshElements( shape );
4703 if ( !solidSM ) return;
4705 // check if the SOLID is bound by concave FACEs
4706 vector< TopoDS_Face > concaveFaces;
4707 TopExp_Explorer faceIt( shape, TopAbs_FACE );
4708 for ( ; faceIt.More(); faceIt.Next() ) // loop on FACEs of a SOLID
4710 const TopoDS_Face& face = TopoDS::Face( faceIt.Current() );
4711 if ( !meshDS->MeshElements( face )) continue;
4713 BRepAdaptor_Surface surface( face );
4714 switch ( surface.GetType() ) {
4715 case GeomAbs_Plane: continue;
4716 case GeomAbs_Cylinder:
4718 case GeomAbs_Sphere:
4721 double u = 0.5 * ( surface.FirstUParameter() + surface.LastUParameter() );
4722 double v = 0.5 * ( surface.FirstVParameter() + surface.LastVParameter() );
4723 gp_Vec Du1, Dv1, Du2, Dv2, Duv2; gp_Pnt p;
4724 surface.D2( u,v, p, Du1, Dv1, Du2, Dv2, Duv2 );
4725 gp_Vec fNorm = Du1 ^ Dv1;
4726 if ( face.Orientation() == TopAbs_REVERSED ) fNorm.Reverse();
4727 bool concaveU = ( fNorm * Du2 > 1e-100 );
4728 bool concaveV = ( fNorm * Dv2 > 1e-100 );
4729 if ( concaveU || concaveV )
4730 concaveFaces.push_back( face );
4732 catch ( Standard_Failure& )
4734 concaveFaces.push_back( face );
4739 if ( concaveFaces.empty() )
4742 // fix 2D mesh on the SOLID
4743 for ( faceIt.ReInit(); faceIt.More(); faceIt.Next() ) // loop on FACEs of a SOLID
4745 SMESH_MesherHelper faceHelper( *theHelper.GetMesh() );
4746 faceHelper.SetSubShape( faceIt.Current() );
4747 force3DOutOfBoundary( faceHelper, theError );
4750 // get an iterator over faces on concaveFaces
4751 vector< SMDS_ElemIteratorPtr > faceIterVec( concaveFaces.size() );
4752 for ( size_t i = 0; i < concaveFaces.size(); ++i )
4753 faceIterVec[i] = meshDS->MeshElements( concaveFaces[i] )->GetElements();
4754 typedef SMDS_IteratorOnIterators
4755 < const SMDS_MeshElement*, vector< SMDS_ElemIteratorPtr > > TIterOnIter;
4756 SMDS_ElemIteratorPtr faceIter( new TIterOnIter( faceIterVec ));
4758 // search to check if a volume is close to a concave face
4759 SMESHUtils::Deleter< SMESH_ElementSearcher > faceSearcher
4760 ( SMESH_MeshAlgos::GetElementSearcher( *theHelper.GetMeshDS(), faceIter ));
4763 //BRepClass3d_SolidClassifier solidClassifier( shape );
4765 TIDSortedElemSet checkedVols, movedNodes;
4766 //for ( faceIt.ReInit(); faceIt.More(); faceIt.Next() ) // loop on FACEs of a SOLID
4767 for ( size_t iF = 0; iF < concaveFaces.size(); ++iF ) // loop on concave FACEs
4769 //const TopoDS_Shape& face = faceIt.Current();
4770 const TopoDS_Shape& face = concaveFaces[ iF ];
4771 SMESHDS_SubMesh* faceSM = meshDS->MeshElements( face );
4772 if ( !faceSM ) continue;
4774 // get nodes shared by volumes (tet and pyra) on the FACE that may be distorted
4775 SMDS_NodeIteratorPtr nodeIt;
4776 if ( faceSM->NbNodes() > 0 ) {
4777 nodeIt = faceSM->GetNodes();
4780 TopExp_Explorer vertex( face, TopAbs_VERTEX );
4781 SMESHDS_SubMesh* vertexSM = meshDS->MeshElements( vertex.Current() );
4782 if ( !vertexSM ) continue;
4783 nodeIt = vertexSM->GetNodes();
4785 // get ids of sub-shapes of the FACE
4787 SMESH_subMeshIteratorPtr smIt =
4788 theHelper.GetMesh()->GetSubMesh( face )->getDependsOnIterator(/*includeSelf=*/true);
4789 while ( smIt->more() )
4790 subIDs.insert( smIt->next()->GetId() );
4792 // find suspicious volumes adjacent to the FACE
4793 vector< const SMDS_MeshNode* > nOnFace( 4 );
4794 const SMDS_MeshNode* nInSolid;
4795 while ( nodeIt->more() )
4797 const SMDS_MeshNode* n = nodeIt->next();
4798 SMDS_ElemIteratorPtr volIt = n->GetInverseElementIterator( SMDSAbs_Volume );
4799 while ( volIt->more() )
4801 const SMDS_MeshElement* vol = volIt->next();
4802 size_t nbN = vol->NbCornerNodes();
4803 if ( ( nbN != 4 && nbN != 5 ) ||
4804 !solidSM->Contains( vol ) ||
4805 !checkedVols.insert( vol ).second )
4808 // get nodes on FACE and in SOLID of a suspicious volume
4809 nOnFace.clear(); nInSolid = 0;
4810 SMDS_MeshElement::iterator volNode = vol->begin_nodes();
4811 for ( int nb = nbN; nb > 0; ++volNode, --nb )
4814 if ( n->GetPosition()->GetDim() == 3 )
4816 else if ( subIDs.count( n->getshapeId() ))
4817 nOnFace.push_back( n );
4821 if ( !nInSolid || nOnFace.size() != nbN - 1 )
4824 // get size of the vol
4825 SMESH_TNodeXYZ pInSolid( nInSolid ), pOnFace0( nOnFace[0] );
4826 double volLength = pInSolid.SquareDistance( nOnFace[0] );
4827 for ( size_t i = 1; i < nOnFace.size(); ++i )
4829 volLength = Max( volLength, pOnFace0.SquareDistance( nOnFace[i] ));
4832 // check if vol is close to concaveFaces
4833 const SMDS_MeshElement* closeFace =
4834 faceSearcher->FindClosestTo( pInSolid, SMDSAbs_Face );
4836 pInSolid.SquareDistance( closeFace->GetNode(0) ) > 4 * volLength )
4839 // check if vol is distorted, i.e. a medium node is much closer
4840 // to nInSolid than the link middle
4841 bool isDistorted = false;
4842 SMDS_FaceOfNodes onFaceTria( nOnFace[0], nOnFace[1], nOnFace[2] );
4843 if ( !SMESH_MeshAlgos::FaceNormal( &onFaceTria, faceNorm, /*normalized=*/false ))
4845 theHelper.AddTLinks( static_cast< const SMDS_MeshVolume* > ( vol ));
4846 vector< pair< SMESH_TLink, const SMDS_MeshNode* > > links;
4847 for ( size_t i = 0; i < nOnFace.size(); ++i ) // loop on links between nOnFace
4848 for ( size_t j = i+1; j < nOnFace.size(); ++j )
4850 SMESH_TLink link( nOnFace[i], nOnFace[j] );
4851 TLinkNodeMap::const_iterator linkIt =
4852 theHelper.GetTLinkNodeMap().find( link );
4853 if ( linkIt != theHelper.GetTLinkNodeMap().end() )
4855 links.push_back( make_pair( linkIt->first, linkIt->second ));
4856 if ( !isDistorted ) {
4857 // compare projections of nInSolid and nMedium to face normal
4858 gp_Pnt pMedium = SMESH_TNodeXYZ( linkIt->second );
4859 double hMedium = faceNorm * gp_Vec( pOnFace0, pMedium ).XYZ();
4860 double hVol = faceNorm * gp_Vec( pOnFace0, pInSolid ).XYZ();
4861 if ( Abs( hMedium ) > Abs( hVol * 0.75 ))
4863 SMESH_TNodeXYZ pI( nOnFace[i]), pJ( nOnFace[j]);
4864 double angle = gp_Vec( pI, pMedium ).Angle( gp_Vec( pI, pJ ));
4865 isDistorted = ( angle > M_PI / 20 );
4870 // move medium nodes to link middle
4873 for ( size_t i = 0; i < links.size(); ++i )
4875 const SMDS_MeshNode* nMedium = links[i].second;
4876 if ( movedNodes.insert( nMedium ).second )
4878 gp_Pnt pMid3D = 0.5 * ( SMESH_TNodeXYZ( links[i].first.node1() ) +
4879 SMESH_TNodeXYZ( links[i].first.node2() ));
4880 meshDS->MoveNode( nMedium, pMid3D.X(), pMid3D.Y(), pMid3D.Z() );
4881 MSG( "move OUT of solid " << nMedium );
4884 static_cast<SMESH_BadInputElements*>( theError.get() )->add( vol );
4886 } // loop on volumes sharing a node on FACE
4887 } // loop on nodes on FACE
4888 } // loop on FACEs of a SOLID
4890 if ( theError->HasBadElems() )
4891 theError->myName = EDITERR_NO_MEDIUM_ON_GEOM;
4897 //=======================================================================
4899 * \brief Move medium nodes of faces and volumes to fix distorted elements
4900 * \param error - container of fixed distorted elements
4901 * \param volumeOnly - to fix nodes on faces or not, if the shape is solid
4903 * Issue 0020307: EDF 992 SMESH : Linea/Quadratic with Medium Node on Geometry
4905 //=======================================================================
4907 void SMESH_MesherHelper::FixQuadraticElements(SMESH_ComputeErrorPtr& compError,
4910 //MESSAGE("FixQuadraticElements " << volumeOnly);
4911 // setenv NO_FixQuadraticElements to know if FixQuadraticElements() is guilty of bad conversion
4912 if ( getenv("NO_FixQuadraticElements") )
4915 // 0. Apply algorithm to SOLIDs or FACEs
4916 // ----------------------------------------------
4917 if ( myShape.IsNull() ) {
4918 if ( !myMesh->HasShapeToMesh() ) return;
4919 SetSubShape( myMesh->GetShapeToMesh() );
4923 TopTools_IndexedMapOfShape solids;
4924 TopExp::MapShapes(myShape,TopAbs_SOLID,solids);
4925 nbSolids = solids.Extent();
4927 TopTools_MapOfShape faces; // faces not in solid or in not meshed solid
4928 for ( TopExp_Explorer f(myShape,TopAbs_FACE,TopAbs_SOLID); f.More(); f.Next() ) {
4929 faces.Add( f.Current() ); // not in solid
4931 for ( TopExp_Explorer s(myShape,TopAbs_SOLID); s.More(); s.Next() ) {
4932 if ( myMesh->GetSubMesh( s.Current() )->IsEmpty() ) { // get faces of solid
4933 for ( TopExp_Explorer f( s.Current(), TopAbs_FACE); f.More(); f.Next() )
4934 faces.Add( f.Current() ); // in not meshed solid
4936 else { // fix nodes in the solid and its faces
4938 MSG("FIX SOLID " << nbSolids-- << " #" << GetMeshDS()->ShapeToIndex(s.Current()));
4940 SMESH_MesherHelper h(*myMesh);
4941 h.SetSubShape( s.Current() );
4942 h.ToFixNodeParameters(true);
4943 h.FixQuadraticElements( compError, false );
4946 // fix nodes on geom faces
4948 int nbfaces = nbSolids;
4949 nbfaces = faces.Extent(); /*avoid "unused varianbles": */ nbfaces++, nbfaces--;
4951 for ( TopTools_MapIteratorOfMapOfShape fIt( faces ); fIt.More(); fIt.Next() ) {
4952 MESSAGE("FIX FACE " << nbfaces-- << " #" << GetMeshDS()->ShapeToIndex(fIt.Key()));
4953 MSG("FIX FACE " << nbfaces-- << " #" << GetMeshDS()->ShapeToIndex(fIt.Key()));
4954 SMESH_MesherHelper h(*myMesh);
4955 h.SetSubShape( fIt.Key() );
4956 h.ToFixNodeParameters(true);
4957 h.FixQuadraticElements( compError, true);
4959 //perf_print_all_meters(1);
4960 if ( compError && compError->myName == EDITERR_NO_MEDIUM_ON_GEOM )
4961 compError->myComment = "during conversion to quadratic, "
4962 "some medium nodes were not placed on geometry to avoid distorting elements";
4966 // 1. Find out type of elements and get iterator on them
4967 // ---------------------------------------------------
4969 SMDS_ElemIteratorPtr elemIt;
4970 SMDSAbs_ElementType elemType = SMDSAbs_All;
4972 SMESH_subMesh* submesh = myMesh->GetSubMeshContaining( myShapeID );
4975 if ( SMESHDS_SubMesh* smDS = submesh->GetSubMeshDS() ) {
4976 elemIt = smDS->GetElements();
4977 if ( elemIt->more() ) {
4978 elemType = elemIt->next()->GetType();
4979 elemIt = smDS->GetElements();
4982 if ( !elemIt || !elemIt->more() || elemType < SMDSAbs_Face )
4985 // 2. Fill in auxiliary data structures
4986 // ----------------------------------
4990 set< QLink >::iterator pLink;
4991 set< QFace >::iterator pFace;
4993 bool isCurved = false;
4994 //bool hasRectFaces = false;
4995 //set<int> nbElemNodeSet;
4996 SMDS_VolumeTool volTool;
4998 TIDSortedNodeSet apexOfPyramid;
4999 const int apexIndex = 4;
5002 // Move medium nodes to the link middle for elements whose corner nodes
5003 // are out of geometrical boundary to fix distorted elements.
5004 force3DOutOfBoundary( *this, compError );
5006 if ( elemType == SMDSAbs_Volume )
5008 while ( elemIt->more() ) // loop on volumes
5010 const SMDS_MeshElement* vol = elemIt->next();
5011 if ( !vol->IsQuadratic() || !volTool.Set( vol ))
5013 double volMinSize2 = -1.;
5014 for ( int iF = 0; iF < volTool.NbFaces(); ++iF ) // loop on faces of volume
5016 int nbN = volTool.NbFaceNodes( iF );
5017 //nbElemNodeSet.insert( nbN );
5018 const SMDS_MeshNode** faceNodes = volTool.GetFaceNodes( iF );
5019 vector< const QLink* > faceLinks( nbN/2 );
5020 for ( int iN = 0; iN < nbN; iN += 2 ) // loop on links of a face
5023 QLink link( faceNodes[iN], faceNodes[iN+2], faceNodes[iN+1] );
5024 pLink = links.insert( link ).first;
5025 faceLinks[ iN/2 ] = & *pLink;
5027 if ( link.MediumPos() == SMDS_TOP_3DSPACE )
5029 if ( !link.IsStraight() )
5030 return; // already fixed
5032 else if ( !isCurved )
5034 if ( volMinSize2 < 0 ) volMinSize2 = volTool.MinLinearSize2();
5035 isCurved = !isStraightLink( volMinSize2, link._nodeMove.SquareMagnitude() );
5039 pFace = faces.insert( QFace( faceLinks )).first;
5040 if ( pFace->NbVolumes() == 0 )
5041 pFace->AddSelfToLinks();
5042 pFace->SetVolume( vol );
5043 // hasRectFaces = hasRectFaces ||
5044 // ( volTool.GetVolumeType() == SMDS_VolumeTool::QUAD_HEXA ||
5045 // volTool.GetVolumeType() == SMDS_VolumeTool::QUAD_PENTA );
5048 pFace->_face = GetMeshDS()->FindFace(faceNodes[0],faceNodes[2],faceNodes[4]);
5050 pFace->_face = GetMeshDS()->FindFace(faceNodes[0],faceNodes[2],
5051 faceNodes[4],faceNodes[6] );
5054 // collect pyramid apexes for further correction
5055 if ( vol->NbCornerNodes() == 5 )
5056 apexOfPyramid.insert( vol->GetNode( apexIndex ));
5058 set< QLink >::iterator pLink = links.begin();
5059 for ( ; pLink != links.end(); ++pLink )
5060 pLink->SetContinuesFaces();
5064 while ( elemIt->more() ) // loop on faces
5066 const SMDS_MeshElement* face = elemIt->next();
5067 if ( !face->IsQuadratic() )
5069 //nbElemNodeSet.insert( face->NbNodes() );
5070 int nbN = face->NbNodes()/2;
5071 vector< const QLink* > faceLinks( nbN );
5072 for ( int iN = 0; iN < nbN; ++iN ) // loop on links of a face
5075 QLink link( face->GetNode(iN), face->GetNode((iN+1)%nbN), face->GetNode(iN+nbN) );
5076 pLink = links.insert( link ).first;
5077 faceLinks[ iN ] = & *pLink;
5079 link.node1()->GetPosition()->GetTypeOfPosition() < 2 &&
5080 link.node2()->GetPosition()->GetTypeOfPosition() < 2 )
5081 isCurved = !link.IsStraight();
5084 pFace = faces.insert( QFace( faceLinks )).first;
5085 pFace->AddSelfToLinks();
5086 //hasRectFaces = ( hasRectFaces || nbN == 4 );
5090 return; // no curved edges of faces
5092 // 3. Compute displacement of medium nodes
5093 // ---------------------------------------
5095 SMESH_MesherHelper faceHlp(*myMesh);
5097 // two loops on QFaces: the first is to treat boundary links, the second is for internal ones.
5098 TopLoc_Location loc;
5100 // not to treat boundary of volumic sub-mesh.
5101 int isInside = ( elemType == SMDSAbs_Volume && volumeOnly ) ? 1 : 0;
5102 for ( ; isInside < 2; ++isInside )
5104 MSG( "--------------- LOOP (inside=" << isInside << ") ------------------");
5105 SMDS_TypeOfPosition pos = isInside ? SMDS_TOP_3DSPACE : SMDS_TOP_FACE;
5106 SMDS_TypeOfPosition bndPos = isInside ? SMDS_TOP_FACE : SMDS_TOP_EDGE;
5108 for ( pFace = faces.begin(); pFace != faces.end(); ++pFace ) {
5109 if ( bool(isInside) == pFace->IsBoundary() )
5111 for ( int dir = 0; dir < 2; ++dir ) // 2 directions of propagation from the quadrangle
5114 // make chain of links connected via continues faces
5117 if ( !pFace->GetLinkChain( dir, rawChain, pos, error) && error ==ERR_UNKNOWN ) continue;
5119 if ( !pFace->GetLinkChain( dir+2, rawChain, pos, error ) && error ==ERR_UNKNOWN ) continue;
5121 vector< TChain > chains;
5122 if ( error == ERR_OK ) { // chain contains continues rectangles
5124 chains[0].splice( chains[0].begin(), rawChain );
5126 else if ( error == ERR_TRI ) { // chain contains continues triangles
5127 TSplitTriaResult res = splitTrianglesIntoChains( rawChain, chains, pos );
5128 if ( res != _OK ) { // not 'quadrangles split into triangles' in chain
5129 fixTriaNearBoundary( rawChain, *this );
5133 else if ( error == ERR_PRISM ) { // quadrangle side faces of prisms
5134 fixPrism( rawChain );
5140 for ( size_t iC = 0; iC < chains.size(); ++iC )
5142 TChain& chain = chains[iC];
5143 if ( chain.empty() ) continue;
5144 if ( chain.front().IsStraight() && chain.back().IsStraight() ) {
5145 MSG("3D straight - ignore");
5148 if ( chain.front()->MediumPos() > bndPos ||
5149 chain.back() ->MediumPos() > bndPos ) {
5150 MSG("Internal chain - ignore");
5153 // measure chain length and compute link position along the chain
5154 double chainLen = 0;
5155 vector< double > linkPos;
5156 TChain savedChain; // backup
5157 MSGBEG( "Link medium nodes: ");
5158 TChain::iterator link0 = chain.begin(), link1 = chain.begin(), link2;
5159 for ( ++link1; link1 != chain.end(); ++link1, ++link0 ) {
5160 MSGBEG( (*link0)->_mediumNode->GetID() << "-" <<(*link1)->_mediumNode->GetID()<<" ");
5161 double len = ((*link0)->MiddlePnt() - (*link1)->MiddlePnt()).Modulus();
5162 while ( len < numeric_limits<double>::min() ) { // remove degenerated link
5163 if ( savedChain.empty() ) savedChain = chain;
5164 link1 = chain.erase( link1 );
5165 if ( link1 == chain.end() )
5167 len = ((*link0)->MiddlePnt() - (*link1)->MiddlePnt()).Modulus();
5170 linkPos.push_back( chainLen );
5173 if ( linkPos.size() <= 2 && savedChain.size() > 2 ) {
5178 for ( link1 = chain.begin(); link1 != chain.end(); ++link1 ) {
5180 linkPos.push_back( chainLen );
5183 gp_Vec move0 = chain.front()->_nodeMove;
5184 gp_Vec move1 = chain.back ()->_nodeMove;
5189 // compute node displacement of end links of chain in parametric space of FACE
5190 TChainLink& linkOnFace = *(++chain.begin());
5191 const SMDS_MeshNode* nodeOnFace = linkOnFace->_mediumNode;
5192 TopoDS_Shape f = GetSubShapeByNode( nodeOnFace, GetMeshDS() );
5193 if ( !f.IsNull() && f.ShapeType() == TopAbs_FACE )
5195 face = TopoDS::Face( f );
5196 faceHlp.SetSubShape( face );
5197 Handle(Geom_Surface) surf = BRep_Tool::Surface(face,loc);
5198 //bool isStraight[2]; // commented for issue 0023118
5199 for ( int is1 = 0; is1 < 2; ++is1 ) // move0 or move1
5201 TChainLink& link = is1 ? chain.back() : chain.front();
5202 gp_XY uvm = faceHlp.GetNodeUV( face, link->_mediumNode, nodeOnFace, &checkUV );
5203 gp_XY uv1 = faceHlp.GetNodeUV( face, link->node1(), nodeOnFace, &checkUV );
5204 gp_XY uv2 = faceHlp.GetNodeUV( face, link->node2(), nodeOnFace, &checkUV );
5205 gp_XY uv12 = faceHlp.GetMiddleUV( surf, uv1, uv2 );
5206 // uvMove = uvm - uv12
5207 gp_XY uvMove = ApplyIn2D(surf, uvm, uv12, gp_XY_Subtracted, /*inPeriod=*/false);
5208 ( is1 ? move1 : move0 ).SetCoord( uvMove.X(), uvMove.Y(), 0 );
5209 if ( !is1 ) // correct nodeOnFace for move1 (issue 0020919)
5210 nodeOnFace = (*(++chain.rbegin()))->_mediumNode;
5211 // isStraight[is1] = isStraightLink( (uv2-uv1).SquareModulus(),
5212 // 10 * uvMove.SquareModulus());
5214 // if ( isStraight[0] && isStraight[1] ) {
5215 // MSG("2D straight - ignore");
5216 // continue; // straight - no need to move nodes of internal links
5219 // check if a chain is already fixed
5220 gp_XY uvm = faceHlp.GetNodeUV( face, linkOnFace->_mediumNode, 0, &checkUV );
5221 gp_XY uv1 = faceHlp.GetNodeUV( face, linkOnFace->node1(), nodeOnFace, &checkUV );
5222 gp_XY uv2 = faceHlp.GetNodeUV( face, linkOnFace->node2(), nodeOnFace, &checkUV );
5223 gp_XY uv12 = faceHlp.GetMiddleUV( surf, uv1, uv2 );
5224 if (( uvm - uv12 ).SquareModulus() > 1e-10 )
5226 MSG("Already fixed - ignore");
5232 if ( isInside || face.IsNull() )
5234 // compute node displacement of end links in their local coord systems
5236 TChainLink& ln0 = chain.front(), ln1 = *(++chain.begin());
5237 trsf.SetTransformation( gp_Ax3( gp::Origin(), ln0.Normal(),
5238 gp_Vec( ln0->MiddlePnt(), ln1->MiddlePnt() )));
5239 move0.Transform(trsf);
5242 TChainLink& ln0 = *(++chain.rbegin()), ln1 = chain.back();
5243 trsf.SetTransformation( gp_Ax3( gp::Origin(), ln1.Normal(),
5244 gp_Vec( ln0->MiddlePnt(), ln1->MiddlePnt() )));
5245 move1.Transform(trsf);
5248 // compute displacement of medium nodes
5249 link2 = chain.begin();
5252 for ( int i = 0; link2 != chain.end(); ++link0, ++link1, ++link2, ++i )
5254 double r = linkPos[i] / chainLen;
5255 // displacement in local coord system
5256 gp_Vec move = (1. - r) * move0 + r * move1;
5257 if ( isInside || face.IsNull()) {
5258 // transform to global
5259 gp_Vec x01( (*link0)->MiddlePnt(), (*link1)->MiddlePnt() );
5260 gp_Vec x12( (*link1)->MiddlePnt(), (*link2)->MiddlePnt() );
5262 gp_Vec x = x01.Normalized() + x12.Normalized();
5263 trsf.SetTransformation( gp_Ax3( gp::Origin(), link1->Normal(), x), gp_Ax3() );
5264 } catch ( Standard_Failure& ) {
5267 move.Transform(trsf);
5268 (*link1)->Move( move, /*sum=*/false, /*is2dFixed=*/false );
5271 // compute 3D displacement by 2D one
5272 Handle(Geom_Surface) s = BRep_Tool::Surface(face,loc);
5273 gp_XY oldUV = faceHlp.GetNodeUV( face, (*link1)->_mediumNode, 0, &checkUV );
5274 gp_XY newUV = ApplyIn2D( s, oldUV, gp_XY( move.X(),move.Y()), gp_XY_Added );
5275 gp_Pnt newPnt = s->Value( newUV.X(), newUV.Y());
5276 move = gp_Vec( XYZ((*link1)->_mediumNode), newPnt.Transformed(loc) );
5277 if ( SMDS_FacePositionPtr nPos = (*link1)->_mediumNode->GetPosition())
5278 nPos->SetParameters( newUV.X(), newUV.Y() );
5280 if ( (XYZ((*link1)->node1()) - XYZ((*link1)->node2())).SquareModulus() <
5281 move.SquareMagnitude())
5283 gp_XY uv0 = faceHlp.GetNodeUV( face, (*link0)->_mediumNode, 0, &checkUV );
5284 gp_XY uv2 = faceHlp.GetNodeUV( face, (*link2)->_mediumNode, 0, &checkUV );
5285 MSG( "TOO LONG MOVE \t" <<
5286 "uv0: "<<uv0.X()<<", "<<uv0.Y()<<" \t" <<
5287 "uv2: "<<uv2.X()<<", "<<uv2.Y()<<" \t" <<
5288 "uvOld: "<<oldUV.X()<<", "<<oldUV.Y()<<" \t" <<
5289 "newUV: "<<newUV.X()<<", "<<newUV.Y()<<" \t");
5290 uv0.SetX( uv2.X() ); // avoid warning: variable set but not used
5293 (*link1)->Move( move, /*sum=*/false, /*is2dFixed=*/true );
5295 MSG( "Move " << (*link1)->_mediumNode->GetID() << " following "
5296 << chain.front()->_mediumNode->GetID() <<"-"
5297 << chain.back ()->_mediumNode->GetID() <<
5298 " by " << move.Magnitude());
5300 } // loop on chains of links
5301 } // loop on 2 directions of propagation from quadrangle
5303 } // fix faces and/or volumes
5308 TIDSortedElemSet biQuadQuas, biQuadTris, triQuadHexa, biQuadPenta;
5309 const bool toFixCentralNodes = ( myMesh->NbBiQuadQuadrangles() +
5310 myMesh->NbBiQuadTriangles() +
5311 myMesh->NbTriQuadraticHexas() +
5312 myMesh->NbBiQuadPrisms());
5314 faceHlp.ToFixNodeParameters( true );
5316 for ( pLink = links.begin(); pLink != links.end(); ++pLink ) {
5317 if ( pLink->IsMoved() )
5319 gp_Pnt p = pLink->MiddlePnt() + pLink->Move();
5321 // put on surface nodes on FACE but moved in 3D (23050)
5322 if ( !pLink->IsFixedOnSurface() )
5324 faceHlp.SetSubShape( pLink->_mediumNode->getshapeId() );
5325 if ( faceHlp.GetSubShape().ShapeType() == TopAbs_FACE )
5327 const_cast<SMDS_MeshNode*>( pLink->_mediumNode )->setXYZ( p.X(), p.Y(), p.Z());
5328 p.Coord( distXYZ[1], distXYZ[2], distXYZ[3] );
5329 gp_XY uv( Precision::Infinite(), 0 );
5330 if ( faceHlp.CheckNodeUV( TopoDS::Face( faceHlp.GetSubShape() ), pLink->_mediumNode,
5331 uv, /*tol=*/pLink->Move().Modulus(), /*force=*/true, distXYZ ))
5332 p.SetCoord( distXYZ[1], distXYZ[2], distXYZ[3] );
5335 GetMeshDS()->MoveNode( pLink->_mediumNode, p.X(), p.Y(), p.Z());
5337 // collect bi-quadratic elements
5338 if ( toFixCentralNodes )
5340 SMDS_ElemIteratorPtr eIt = pLink->_mediumNode->GetInverseElementIterator();
5341 while ( eIt->more() )
5343 const SMDS_MeshElement* e = eIt->next();
5344 switch( e->GetEntityType() ) {
5345 case SMDSEntity_BiQuad_Quadrangle: biQuadQuas.insert( e ); break;
5346 case SMDSEntity_BiQuad_Triangle: biQuadTris.insert( e ); break;
5347 case SMDSEntity_TriQuad_Hexa: triQuadHexa.insert( e ); break;
5348 case SMDSEntity_BiQuad_Penta: biQuadPenta.insert( e ); break;
5355 // Fix positions of central nodes of bi-tri-quadratic elements
5357 // treat bi-quad quadrangles
5359 vector< const SMDS_MeshNode* > nodes( 9 );
5361 TIDSortedElemSet::iterator quadIt = biQuadQuas.begin();
5362 for ( ; quadIt != biQuadQuas.end(); ++quadIt )
5364 const SMDS_MeshElement* quad = *quadIt;
5367 nodes.assign( quad->begin_nodes(), quad->end_nodes() );
5369 TopoDS_Shape S = GetSubShapeByNode( nodes.back(), GetMeshDS() );
5370 if ( S.IsNull() || S.ShapeType() != TopAbs_FACE ) continue;
5371 const TopoDS_Face& F = TopoDS::Face( S );
5372 Handle( Geom_Surface ) surf = BRep_Tool::Surface( F, loc );
5373 const double tol = BRep_Tool::Tolerance( F );
5375 for ( int i = 0; i < 8; ++i )
5377 uv[ i ] = GetNodeUV( F, nodes[i], nodes[8], &checkUV );
5378 // as this method is used after mesh generation, UV of nodes is not
5379 // updated according to bending links, so we update
5380 if ( i > 3 && nodes[i]->GetPosition()->GetTypeOfPosition() == SMDS_TOP_FACE )
5381 CheckNodeUV( F, nodes[i], uv[ i ], 2*tol, /*force=*/true );
5383 AdjustByPeriod( F, uv, 8 ); // put uv[] within a period (IPAL52698)
5384 // move the central node
5385 gp_XY uvCent = calcTFI (0.5, 0.5, uv[0],uv[1],uv[2],uv[3],uv[4],uv[5],uv[6],uv[7] );
5386 gp_Pnt p = surf->Value( uvCent.X(), uvCent.Y() ).Transformed( loc );
5387 GetMeshDS()->MoveNode( nodes[8], p.X(), p.Y(), p.Z());
5391 // treat bi-quad triangles
5393 vector< const SMDS_MeshNode* > nodes;
5395 TIDSortedElemSet::iterator triIt = biQuadTris.begin();
5396 for ( ; triIt != biQuadTris.end(); ++triIt )
5398 const SMDS_MeshElement* tria = *triIt;
5400 const TopoDS_Shape& S = GetMeshDS()->IndexToShape( tria->getshapeId() );
5401 if ( S.IsNull() || S.ShapeType() != TopAbs_FACE ) continue;
5402 const TopoDS_Face& F = TopoDS::Face( S );
5403 Handle( Geom_Surface ) surf = BRep_Tool::Surface( F, loc );
5404 const double tol = BRep_Tool::Tolerance( F );
5407 nodes.assign( tria->begin_nodes(), tria->end_nodes() );
5409 bool uvOK = true, badTria = false;
5410 for ( int i = 0; i < 6; ++i )
5412 uv[ i ] = GetNodeUV( F, nodes[i], nodes[(i+1)%3], &uvOK );
5413 // as this method is used after mesh generation, UV of nodes is not
5414 // updated according to bending links, so we update
5415 if ( nodes[i]->GetPosition()->GetTypeOfPosition() == SMDS_TOP_FACE )
5416 CheckNodeUV( F, nodes[i], uv[ i ], 2*tol, /*force=*/true );
5419 // move the central node
5421 if ( !uvOK || badTria )
5423 p = ( SMESH_TNodeXYZ( nodes[3] ) +
5424 SMESH_TNodeXYZ( nodes[4] ) +
5425 SMESH_TNodeXYZ( nodes[5] )) / 3;
5429 AdjustByPeriod( F, uv, 6 ); // put uv[] within a period (IPAL52698)
5430 gp_XY uvCent = GetCenterUV( uv[0], uv[1], uv[2], uv[3], uv[4], uv[5], &badTria );
5431 p = surf->Value( uvCent.X(), uvCent.Y() ).Transformed( loc );
5433 GetMeshDS()->MoveNode( tria->GetNode(6), p.X(), p.Y(), p.Z() );
5437 // treat tri-quadratic hexahedra
5439 SMDS_VolumeTool volExp;
5440 TIDSortedElemSet::iterator hexIt = triQuadHexa.begin();
5441 for ( ; hexIt != triQuadHexa.end(); ++hexIt )
5443 volExp.Set( *hexIt, /*ignoreCentralNodes=*/false );
5445 // fix nodes central in sides
5446 for ( int iQuad = 0; iQuad < volExp.NbFaces(); ++iQuad )
5448 const SMDS_MeshNode** quadNodes = volExp.GetFaceNodes( iQuad );
5449 if ( quadNodes[8]->GetPosition()->GetTypeOfPosition() == SMDS_TOP_3DSPACE )
5451 gp_XYZ p = calcTFI( 0.5, 0.5,
5452 SMESH_TNodeXYZ( quadNodes[0] ), SMESH_TNodeXYZ( quadNodes[2] ),
5453 SMESH_TNodeXYZ( quadNodes[4] ), SMESH_TNodeXYZ( quadNodes[6] ),
5454 SMESH_TNodeXYZ( quadNodes[1] ), SMESH_TNodeXYZ( quadNodes[3] ),
5455 SMESH_TNodeXYZ( quadNodes[5] ), SMESH_TNodeXYZ( quadNodes[7] ));
5456 GetMeshDS()->MoveNode( quadNodes[8], p.X(), p.Y(), p.Z());
5460 // fix the volume central node
5461 vector<gp_XYZ> pointsOnShapes( SMESH_Block::ID_Shell );
5462 const SMDS_MeshNode** hexNodes = volExp.GetNodes();
5464 pointsOnShapes[ SMESH_Block::ID_V000 ] = SMESH_TNodeXYZ( hexNodes[ 0 ] );
5465 pointsOnShapes[ SMESH_Block::ID_V100 ] = SMESH_TNodeXYZ( hexNodes[ 3 ] );
5466 pointsOnShapes[ SMESH_Block::ID_V010 ] = SMESH_TNodeXYZ( hexNodes[ 1 ] );
5467 pointsOnShapes[ SMESH_Block::ID_V110 ] = SMESH_TNodeXYZ( hexNodes[ 2 ] );
5468 pointsOnShapes[ SMESH_Block::ID_V001 ] = SMESH_TNodeXYZ( hexNodes[ 4 ] );
5469 pointsOnShapes[ SMESH_Block::ID_V101 ] = SMESH_TNodeXYZ( hexNodes[ 7 ] );
5470 pointsOnShapes[ SMESH_Block::ID_V011 ] = SMESH_TNodeXYZ( hexNodes[ 5 ] );
5471 pointsOnShapes[ SMESH_Block::ID_V111 ] = SMESH_TNodeXYZ( hexNodes[ 6 ] );
5473 pointsOnShapes[ SMESH_Block::ID_Ex00 ] = SMESH_TNodeXYZ( hexNodes[ 11 ] );
5474 pointsOnShapes[ SMESH_Block::ID_Ex10 ] = SMESH_TNodeXYZ( hexNodes[ 9 ] );
5475 pointsOnShapes[ SMESH_Block::ID_E0y0 ] = SMESH_TNodeXYZ( hexNodes[ 8 ] );
5476 pointsOnShapes[ SMESH_Block::ID_E1y0 ] = SMESH_TNodeXYZ( hexNodes[ 10 ] );
5477 pointsOnShapes[ SMESH_Block::ID_Ex01 ] = SMESH_TNodeXYZ( hexNodes[ 15 ] );
5478 pointsOnShapes[ SMESH_Block::ID_Ex11 ] = SMESH_TNodeXYZ( hexNodes[ 13 ] );
5479 pointsOnShapes[ SMESH_Block::ID_E0y1 ] = SMESH_TNodeXYZ( hexNodes[ 12 ] );
5480 pointsOnShapes[ SMESH_Block::ID_E1y1 ] = SMESH_TNodeXYZ( hexNodes[ 14 ] );
5481 pointsOnShapes[ SMESH_Block::ID_E00z ] = SMESH_TNodeXYZ( hexNodes[ 16 ] );
5482 pointsOnShapes[ SMESH_Block::ID_E10z ] = SMESH_TNodeXYZ( hexNodes[ 19 ] );
5483 pointsOnShapes[ SMESH_Block::ID_E01z ] = SMESH_TNodeXYZ( hexNodes[ 17 ] );
5484 pointsOnShapes[ SMESH_Block::ID_E11z ] = SMESH_TNodeXYZ( hexNodes[ 18 ] );
5486 pointsOnShapes[ SMESH_Block::ID_Fxy0 ] = SMESH_TNodeXYZ( hexNodes[ 20 ] );
5487 pointsOnShapes[ SMESH_Block::ID_Fxy1 ] = SMESH_TNodeXYZ( hexNodes[ 25 ] );
5488 pointsOnShapes[ SMESH_Block::ID_Fx0z ] = SMESH_TNodeXYZ( hexNodes[ 21 ] );
5489 pointsOnShapes[ SMESH_Block::ID_Fx1z ] = SMESH_TNodeXYZ( hexNodes[ 23 ] );
5490 pointsOnShapes[ SMESH_Block::ID_F0yz ] = SMESH_TNodeXYZ( hexNodes[ 24 ] );
5491 pointsOnShapes[ SMESH_Block::ID_F1yz ] = SMESH_TNodeXYZ( hexNodes[ 22 ] );
5493 gp_XYZ nCenterParams(0.5, 0.5, 0.5), nCenterCoords;
5494 SMESH_Block::ShellPoint( nCenterParams, pointsOnShapes, nCenterCoords );
5495 GetMeshDS()->MoveNode( hexNodes[26],
5496 nCenterCoords.X(), nCenterCoords.Y(), nCenterCoords.Z());
5499 // treat tri-quadratic hexahedra
5501 SMDS_VolumeTool volExp;
5502 TIDSortedElemSet::iterator pentIt = biQuadPenta.begin();
5503 for ( ; pentIt != biQuadPenta.end(); ++pentIt )
5506 volExp.Set( *pentIt, /*ignoreCentralNodes=*/false );
5510 // avoid warning: defined but not used operator<<()
5511 SMESH_Comment() << *links.begin() << *faces.begin();
5515 //================================================================================
5519 //================================================================================
5521 void SMESH_MesherHelper::WriteShape(const TopoDS_Shape& s)
5523 const char* name = "/tmp/shape.brep";
5524 BRepTools::Write( s, name );
5526 std::cout << name << std::endl;