1 // Copyright (C) 2007-2015 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 "SMESH_Block.hxx"
35 #include "SMESH_HypoFilter.hxx"
36 #include "SMESH_MeshAlgos.hxx"
37 #include "SMESH_ProxyMesh.hxx"
38 #include "SMESH_subMesh.hxx"
40 #include <BRepAdaptor_Curve.hxx>
41 #include <BRepAdaptor_Surface.hxx>
42 #include <BRepTools.hxx>
43 #include <BRep_Tool.hxx>
44 #include <Geom2d_Curve.hxx>
45 #include <GeomAPI_ProjectPointOnCurve.hxx>
46 #include <GeomAPI_ProjectPointOnSurf.hxx>
47 #include <Geom_Curve.hxx>
48 #include <Geom_RectangularTrimmedSurface.hxx>
49 #include <Geom_Surface.hxx>
50 #include <ShapeAnalysis.hxx>
52 #include <TopExp_Explorer.hxx>
53 #include <TopTools_ListIteratorOfListOfShape.hxx>
54 #include <TopTools_MapIteratorOfMapOfShape.hxx>
55 #include <TopTools_MapOfShape.hxx>
58 #include <gp_Pnt2d.hxx>
59 #include <gp_Trsf.hxx>
61 #include <Standard_Failure.hxx>
62 #include <Standard_ErrorHandler.hxx>
64 #include <utilities.h>
70 #define RETURN_BAD_RESULT(msg) { MESSAGE(msg); return false; }
74 inline SMESH_TNodeXYZ XYZ(const SMDS_MeshNode* n) { return SMESH_TNodeXYZ(n); }
76 enum { U_periodic = 1, V_periodic = 2 };
79 //================================================================================
83 //================================================================================
85 SMESH_MesherHelper::SMESH_MesherHelper(SMESH_Mesh& theMesh)
89 myCreateQuadratic(false),
90 myCreateBiQuadratic(false),
91 myFixNodeParameters(false)
93 myPar1[0] = myPar2[0] = myPar1[1] = myPar2[1] = 0;
94 mySetElemOnShape = ( ! myMesh->HasShapeToMesh() );
97 //=======================================================================
98 //function : ~SMESH_MesherHelper
100 //=======================================================================
102 SMESH_MesherHelper::~SMESH_MesherHelper()
105 TID2ProjectorOnSurf::iterator i_proj = myFace2Projector.begin();
106 for ( ; i_proj != myFace2Projector.end(); ++i_proj )
107 delete i_proj->second;
110 TID2ProjectorOnCurve::iterator i_proj = myEdge2Projector.begin();
111 for ( ; i_proj != myEdge2Projector.end(); ++i_proj )
112 delete i_proj->second;
116 //=======================================================================
117 //function : IsQuadraticSubMesh
118 //purpose : Check submesh for given shape: if all elements on this shape
119 // are quadratic, quadratic elements will be created.
120 // Also fill myTLinkNodeMap
121 //=======================================================================
123 bool SMESH_MesherHelper::IsQuadraticSubMesh(const TopoDS_Shape& aSh)
125 SMESHDS_Mesh* meshDS = GetMeshDS();
126 // we can create quadratic elements only if all elements
127 // created on sub-shapes of given shape are quadratic
128 // also we have to fill myTLinkNodeMap
129 myCreateQuadratic = true;
130 mySeamShapeIds.clear();
131 myDegenShapeIds.clear();
132 TopAbs_ShapeEnum subType( aSh.ShapeType()==TopAbs_FACE ? TopAbs_EDGE : TopAbs_FACE );
133 if ( aSh.ShapeType()==TopAbs_COMPOUND )
135 TopoDS_Iterator subIt( aSh );
137 subType = ( subIt.Value().ShapeType()==TopAbs_FACE ) ? TopAbs_EDGE : TopAbs_FACE;
139 SMDSAbs_ElementType elemType( subType==TopAbs_FACE ? SMDSAbs_Face : SMDSAbs_Edge );
142 int nbOldLinks = myTLinkNodeMap.size();
144 if ( !myMesh->HasShapeToMesh() )
146 if (( myCreateQuadratic = myMesh->NbFaces( ORDER_QUADRATIC )))
148 SMDS_FaceIteratorPtr fIt = meshDS->facesIterator();
149 while ( fIt->more() )
150 AddTLinks( static_cast< const SMDS_MeshFace* >( fIt->next() ));
155 TopExp_Explorer exp( aSh, subType );
156 TopTools_MapOfShape checkedSubShapes;
157 for (; exp.More() && myCreateQuadratic; exp.Next()) {
158 if ( !checkedSubShapes.Add( exp.Current() ))
159 continue; // needed if aSh is compound of solids
160 if ( SMESHDS_SubMesh * subMesh = meshDS->MeshElements( exp.Current() )) {
161 if ( SMDS_ElemIteratorPtr it = subMesh->GetElements() ) {
163 const SMDS_MeshElement* e = it->next();
164 if ( e->GetType() != elemType || !e->IsQuadratic() ) {
165 myCreateQuadratic = false;
170 switch ( e->NbCornerNodes() ) {
172 AddTLinkNode(e->GetNode(0),e->GetNode(1),e->GetNode(2)); break;
174 AddTLinkNode(e->GetNode(0),e->GetNode(1),e->GetNode(3));
175 AddTLinkNode(e->GetNode(1),e->GetNode(2),e->GetNode(4));
176 AddTLinkNode(e->GetNode(2),e->GetNode(0),e->GetNode(5)); break;
178 AddTLinkNode(e->GetNode(0),e->GetNode(1),e->GetNode(4));
179 AddTLinkNode(e->GetNode(1),e->GetNode(2),e->GetNode(5));
180 AddTLinkNode(e->GetNode(2),e->GetNode(3),e->GetNode(6));
181 AddTLinkNode(e->GetNode(3),e->GetNode(0),e->GetNode(7));
184 myCreateQuadratic = false;
194 if ( nbOldLinks == myTLinkNodeMap.size() )
195 myCreateQuadratic = false;
197 if(!myCreateQuadratic) {
198 myTLinkNodeMap.clear();
202 return myCreateQuadratic;
205 //=======================================================================
206 //function : SetSubShape
207 //purpose : Set geometry to make elements on
208 //=======================================================================
210 void SMESH_MesherHelper::SetSubShape(const int aShID)
212 if ( aShID == myShapeID )
215 SetSubShape( GetMeshDS()->IndexToShape( aShID ));
217 SetSubShape( TopoDS_Shape() );
220 //=======================================================================
221 //function : SetSubShape
222 //purpose : Set geometry to create elements on
223 //=======================================================================
225 void SMESH_MesherHelper::SetSubShape(const TopoDS_Shape& aSh)
227 if ( myShape.IsSame( aSh ))
231 mySeamShapeIds.clear();
232 myDegenShapeIds.clear();
234 if ( myShape.IsNull() ) {
238 SMESHDS_Mesh* meshDS = GetMeshDS();
239 myShapeID = meshDS->ShapeToIndex(aSh);
242 // treatment of periodic faces
243 for ( TopExp_Explorer eF( aSh, TopAbs_FACE ); eF.More(); eF.Next() )
245 const TopoDS_Face& face = TopoDS::Face( eF.Current() );
246 BRepAdaptor_Surface surf( face, false );
247 if ( surf.IsUPeriodic() || surf.IsUClosed() ) {
248 myParIndex |= U_periodic;
249 myPar1[0] = surf.FirstUParameter();
250 myPar2[0] = surf.LastUParameter();
252 if ( surf.IsVPeriodic() || surf.IsVClosed() ) {
253 myParIndex |= V_periodic;
254 myPar1[1] = surf.FirstVParameter();
255 myPar2[1] = surf.LastVParameter();
259 for (TopExp_Explorer exp( face, TopAbs_EDGE ); exp.More(); exp.Next())
261 // look for a "seam" edge, a real seam or an edge on period boundary
262 TopoDS_Edge edge = TopoDS::Edge( exp.Current() );
263 const int edgeID = meshDS->ShapeToIndex( edge );
266 BRep_Tool::UVPoints( edge, face, uv1, uv2 );
267 const double du = Abs( uv1.Coord(1) - uv2.Coord(1) );
268 const double dv = Abs( uv1.Coord(2) - uv2.Coord(2) );
270 bool isSeam = BRep_Tool::IsClosed( edge, face );
271 if ( isSeam ) // real seam - having two pcurves on face
273 // pcurve can lie not on pediod boundary (22582, mesh_Quadratic_01/C9)
276 double u1 = uv1.Coord(1);
278 BRep_Tool::UVPoints( edge, face, uv1, uv2 );
279 double u2 = uv1.Coord(1);
280 myPar1[0] = Min( u1, u2 );
281 myPar2[0] = Max( u1, u2 );
285 double v1 = uv1.Coord(2);
287 BRep_Tool::UVPoints( edge, face, uv1, uv2 );
288 double v2 = uv1.Coord(2);
289 myPar1[1] = Min( v1, v2 );
290 myPar2[1] = Max( v1, v2 );
293 else //if ( !isSeam )
295 // one pcurve but on period boundary (22772, mesh_Quadratic_01/D1)
296 if (( myParIndex & U_periodic ) && du < Precision::PConfusion() )
298 isSeam = ( Abs( uv1.Coord(1) - myPar1[0] ) < Precision::PConfusion() ||
299 Abs( uv1.Coord(1) - myPar2[0] ) < Precision::PConfusion() );
301 else if (( myParIndex & V_periodic ) && dv < Precision::PConfusion() )
303 isSeam = ( Abs( uv1.Coord(2) - myPar1[1] ) < Precision::PConfusion() ||
304 Abs( uv1.Coord(2) - myPar2[1] ) < Precision::PConfusion() );
306 if ( isSeam ) // vertices are on period boundary, check a middle point (23032)
308 double f,l, r = 0.2345;
309 Handle(Geom2d_Curve) C2d = BRep_Tool::CurveOnSurface( edge, face, f, l );
310 uv2 = C2d->Value( f * r + l * ( 1.-r ));
311 if ( du < Precision::PConfusion() )
312 isSeam = ( Abs( uv1.Coord(1) - uv2.Coord(1) ) < Precision::PConfusion() );
314 isSeam = ( Abs( uv1.Coord(2) - uv2.Coord(2) ) < Precision::PConfusion() );
319 // store seam shape indices, negative if shape encounters twice ('real seam')
320 mySeamShapeIds.insert( IsSeamShape( edgeID ) ? -edgeID : edgeID );
321 for ( TopExp_Explorer v( edge, TopAbs_VERTEX ); v.More(); v.Next() ) {
322 int vertexID = meshDS->ShapeToIndex( v.Current() );
323 mySeamShapeIds.insert( IsSeamShape( vertexID ) ? -vertexID : vertexID );
327 // look for a degenerated edge
328 if ( SMESH_Algo::isDegenerated( edge )) {
329 myDegenShapeIds.insert( edgeID );
330 for ( TopExp_Explorer v( edge, TopAbs_VERTEX ); v.More(); v.Next() )
331 myDegenShapeIds.insert( meshDS->ShapeToIndex( v.Current() ));
333 if ( !BRep_Tool::SameParameter( edge ) ||
334 !BRep_Tool::SameRange( edge ))
336 setPosOnShapeValidity( edgeID, false );
342 //=======================================================================
343 //function : GetNodeUVneedInFaceNode
344 //purpose : Check if inFaceNode argument is necessary for call GetNodeUV(F,..)
345 // Return true if the face is periodic.
346 // If F is Null, answer about sub-shape set through IsQuadraticSubMesh() or
348 //=======================================================================
350 bool SMESH_MesherHelper::GetNodeUVneedInFaceNode(const TopoDS_Face& F) const
352 if ( F.IsNull() ) return !mySeamShapeIds.empty();
354 if ( !F.IsNull() && !myShape.IsNull() && myShape.IsSame( F ))
355 return !mySeamShapeIds.empty();
358 Handle(Geom_Surface) aSurface = BRep_Tool::Surface( F,loc );
359 if ( !aSurface.IsNull() )
360 return ( aSurface->IsUPeriodic() || aSurface->IsVPeriodic() );
365 //=======================================================================
366 //function : IsMedium
368 //=======================================================================
370 bool SMESH_MesherHelper::IsMedium(const SMDS_MeshNode* node,
371 const SMDSAbs_ElementType typeToCheck)
373 return SMESH_MeshEditor::IsMedium( node, typeToCheck );
376 //=======================================================================
377 //function : GetSubShapeByNode
378 //purpose : Return support shape of a node
379 //=======================================================================
381 TopoDS_Shape SMESH_MesherHelper::GetSubShapeByNode(const SMDS_MeshNode* node,
382 const SMESHDS_Mesh* meshDS)
384 int shapeID = node ? node->getshapeId() : 0;
385 if ( 0 < shapeID && shapeID <= meshDS->MaxShapeIndex() )
386 return meshDS->IndexToShape( shapeID );
388 return TopoDS_Shape();
392 //=======================================================================
393 //function : AddTLinkNode
394 //purpose : add a link in my data structure
395 //=======================================================================
397 void SMESH_MesherHelper::AddTLinkNode(const SMDS_MeshNode* n1,
398 const SMDS_MeshNode* n2,
399 const SMDS_MeshNode* n12)
401 // add new record to map
402 SMESH_TLink link( n1, n2 );
403 myTLinkNodeMap.insert( make_pair(link,n12));
406 //================================================================================
408 * \brief Add quadratic links of edge to own data structure
410 //================================================================================
412 bool SMESH_MesherHelper::AddTLinks(const SMDS_MeshEdge* edge)
414 if ( edge && edge->IsQuadratic() )
415 AddTLinkNode(edge->GetNode(0), edge->GetNode(1), edge->GetNode(2));
421 //================================================================================
423 * \brief Add quadratic links of face to own data structure
425 //================================================================================
427 bool SMESH_MesherHelper::AddTLinks(const SMDS_MeshFace* f)
431 switch ( f->NbNodes() ) {
433 // myMapWithCentralNode.insert
434 // ( make_pair( TBiQuad( f->GetNode(0),f->GetNode(1),f->GetNode(2) ),
436 // break; -- add medium nodes as well
438 AddTLinkNode(f->GetNode(0),f->GetNode(1),f->GetNode(3));
439 AddTLinkNode(f->GetNode(1),f->GetNode(2),f->GetNode(4));
440 AddTLinkNode(f->GetNode(2),f->GetNode(0),f->GetNode(5)); break;
443 // myMapWithCentralNode.insert
444 // ( make_pair( TBiQuad( f->GetNode(0),f->GetNode(1),f->GetNode(2),f->GetNode(3) ),
446 // break; -- add medium nodes as well
448 AddTLinkNode(f->GetNode(0),f->GetNode(1),f->GetNode(4));
449 AddTLinkNode(f->GetNode(1),f->GetNode(2),f->GetNode(5));
450 AddTLinkNode(f->GetNode(2),f->GetNode(3),f->GetNode(6));
451 AddTLinkNode(f->GetNode(3),f->GetNode(0),f->GetNode(7)); break;
458 //================================================================================
460 * \brief Add quadratic links of volume to own data structure
462 //================================================================================
464 bool SMESH_MesherHelper::AddTLinks(const SMDS_MeshVolume* volume)
466 if ( volume->IsQuadratic() )
468 SMDS_VolumeTool vTool( volume );
469 const SMDS_MeshNode** nodes = vTool.GetNodes();
471 for ( int iF = 1; iF < vTool.NbFaces(); ++iF )
473 const int nbN = vTool.NbFaceNodes( iF );
474 const int* iNodes = vTool.GetFaceNodesIndices( iF );
475 for ( int i = 0; i < nbN; )
477 int iN1 = iNodes[i++];
478 int iN12 = iNodes[i++];
480 if ( iN1 > iN2 ) std::swap( iN1, iN2 );
481 int linkID = iN1 * vTool.NbNodes() + iN2;
482 pair< set<int>::iterator, bool > it_isNew = addedLinks.insert( linkID );
483 if ( it_isNew.second )
484 AddTLinkNode( nodes[iN1], nodes[iN2], nodes[iN12] );
486 addedLinks.erase( it_isNew.first ); // each link encounters only twice
488 if ( vTool.NbNodes() == 27 )
490 const SMDS_MeshNode* nFCenter = nodes[ vTool.GetCenterNodeIndex( iF )];
491 if ( nFCenter->GetPosition()->GetTypeOfPosition() == SMDS_TOP_3DSPACE )
492 myMapWithCentralNode.insert
493 ( make_pair( TBiQuad( nodes[ iNodes[0]], nodes[ iNodes[1]],
494 nodes[ iNodes[2]], nodes[ iNodes[3]] ),
503 //================================================================================
505 * \brief Return true if position of nodes on the shape hasn't yet been checked or
506 * the positions proved to be invalid
508 //================================================================================
510 bool SMESH_MesherHelper::toCheckPosOnShape(int shapeID ) const
512 map< int,bool >::const_iterator id_ok = myNodePosShapesValidity.find( shapeID );
513 return ( id_ok == myNodePosShapesValidity.end() || !id_ok->second );
516 //================================================================================
518 * \brief Set validity of positions of nodes on the shape.
519 * Once set, validity is not changed
521 //================================================================================
523 void SMESH_MesherHelper::setPosOnShapeValidity(int shapeID, bool ok ) const
525 std::map< int,bool >::iterator sh_ok =
526 ((SMESH_MesherHelper*)this)->myNodePosShapesValidity.insert( make_pair( shapeID, ok)).first;
531 //=======================================================================
532 //function : ToFixNodeParameters
533 //purpose : Enables fixing node parameters on EDGEs and FACEs in
534 // GetNodeU(...,check=true), GetNodeUV(...,check=true), CheckNodeUV() and
535 // CheckNodeU() in case if a node lies on a shape set via SetSubShape().
537 //=======================================================================
539 void SMESH_MesherHelper::ToFixNodeParameters(bool toFix)
541 myFixNodeParameters = toFix;
545 //=======================================================================
546 //function : getUVOnSeam
547 //purpose : Select UV on either of 2 pcurves of a seam edge, closest to the given UV
548 //=======================================================================
550 gp_Pnt2d SMESH_MesherHelper::getUVOnSeam( const gp_Pnt2d& uv1, const gp_Pnt2d& uv2 ) const
552 gp_Pnt2d result = uv1;
553 for ( int i = U_periodic; i <= V_periodic ; ++i )
555 if ( myParIndex & i )
557 double p1 = uv1.Coord( i );
558 double dp1 = Abs( p1-myPar1[i-1]), dp2 = Abs( p1-myPar2[i-1]);
559 if ( myParIndex == i ||
560 dp1 < ( myPar2[i-1] - myPar1[i-1] ) / 100. ||
561 dp2 < ( myPar2[i-1] - myPar1[i-1] ) / 100. )
563 double p2 = uv2.Coord( i );
564 double p1Alt = ( dp1 < dp2 ) ? myPar2[i-1] : myPar1[i-1];
565 if ( Abs( p2 - p1 ) > Abs( p2 - p1Alt ))
566 result.SetCoord( i, p1Alt );
573 //=======================================================================
574 //function : GetNodeUV
575 //purpose : Return node UV on face
576 //=======================================================================
578 gp_XY SMESH_MesherHelper::GetNodeUV(const TopoDS_Face& F,
579 const SMDS_MeshNode* n,
580 const SMDS_MeshNode* n2,
583 gp_Pnt2d uv( Precision::Infinite(), Precision::Infinite() );
585 const SMDS_PositionPtr Pos = n->GetPosition();
587 if ( Pos->GetTypeOfPosition() == SMDS_TOP_FACE )
589 // node has position on face
590 const SMDS_FacePosition* fpos = static_cast<const SMDS_FacePosition*>( Pos );
591 uv.SetCoord( fpos->GetUParameter(), fpos->GetVParameter() );
593 uvOK = CheckNodeUV( F, n, uv.ChangeCoord(), 2.*getFaceMaxTol( F )); // 2. from 22830
595 else if ( Pos->GetTypeOfPosition() == SMDS_TOP_EDGE )
597 // node has position on EDGE => it is needed to find
598 // corresponding EDGE from FACE, get pcurve for this
599 // EDGE and retrieve value from this pcurve
600 const SMDS_EdgePosition* epos = static_cast<const SMDS_EdgePosition*>( Pos );
601 const int edgeID = n->getshapeId();
602 const TopoDS_Edge& E = TopoDS::Edge( GetMeshDS()->IndexToShape( edgeID ));
603 double f, l, u = epos->GetUParameter();
604 Handle(Geom2d_Curve) C2d = BRep_Tool::CurveOnSurface( E, F, f, l );
605 bool validU = ( !C2d.IsNull() && ( f < u ) && ( u < l ));
606 if ( validU ) uv = C2d->Value( u );
607 else uv.SetCoord( Precision::Infinite(),0.);
608 if ( check || !validU )
609 uvOK = CheckNodeUV( F, n, uv.ChangeCoord(), 2.*getFaceMaxTol( F ),/*force=*/ !validU );
611 // for a node on a seam EDGE select one of UVs on 2 pcurves
612 if ( n2 && IsSeamShape( edgeID ))
614 uv = getUVOnSeam( uv, GetNodeUV( F, n2, 0, check ));
617 { // adjust uv to period
619 Handle(Geom_Surface) S = BRep_Tool::Surface(F,loc);
620 Standard_Boolean isUPeriodic = S->IsUPeriodic();
621 Standard_Boolean isVPeriodic = S->IsVPeriodic();
623 if ( isUPeriodic || isVPeriodic ) {
624 Standard_Real UF,UL,VF,VL;
625 S->Bounds(UF,UL,VF,VL);
626 if ( isUPeriodic ) newUV.SetX( uv.X() + ShapeAnalysis::AdjustToPeriod(uv.X(),UF,UL));
627 if ( isVPeriodic ) newUV.SetY( uv.Y() + ShapeAnalysis::AdjustToPeriod(uv.Y(),VF,VL));
631 gp_Pnt2d uv2 = GetNodeUV( F, n2, 0, check );
632 if ( isUPeriodic && Abs( uv.X()-uv2.X() ) < Abs( newUV.X()-uv2.X() ))
633 newUV.SetX( uv.X() );
634 if ( isVPeriodic && Abs( uv.Y()-uv2.Y() ) < Abs( newUV.Y()-uv2.Y() ))
635 newUV.SetY( uv.Y() );
641 else if ( Pos->GetTypeOfPosition() == SMDS_TOP_VERTEX )
643 if ( int vertexID = n->getshapeId() ) {
644 const TopoDS_Vertex& V = TopoDS::Vertex(GetMeshDS()->IndexToShape(vertexID));
646 uv = BRep_Tool::Parameters( V, F );
649 catch (Standard_Failure& exc) {
652 for ( TopExp_Explorer vert(F,TopAbs_VERTEX); !uvOK && vert.More(); vert.Next() )
653 uvOK = ( V == vert.Current() );
655 MESSAGE ( "SMESH_MesherHelper::GetNodeUV(); Vertex " << vertexID
656 << " not in face " << GetMeshDS()->ShapeToIndex( F ) );
657 // get UV of a vertex closest to the node
659 gp_Pnt pn = XYZ( n );
660 for ( TopExp_Explorer vert( F,TopAbs_VERTEX ); !uvOK && vert.More(); vert.Next() ) {
661 TopoDS_Vertex curV = TopoDS::Vertex( vert.Current() );
662 gp_Pnt p = BRep_Tool::Pnt( curV );
663 double curDist = p.SquareDistance( pn );
664 if ( curDist < dist ) {
666 uv = BRep_Tool::Parameters( curV, F );
667 uvOK = ( dist < DBL_MIN );
673 TopTools_ListIteratorOfListOfShape it( myMesh->GetAncestors( V ));
674 for ( ; it.More(); it.Next() ) {
675 if ( it.Value().ShapeType() == TopAbs_EDGE ) {
676 const TopoDS_Edge & edge = TopoDS::Edge( it.Value() );
678 Handle(Geom2d_Curve) C2d = BRep_Tool::CurveOnSurface(edge, F, f, l);
679 if ( !C2d.IsNull() ) {
680 double u = ( V == TopExp::FirstVertex( edge ) ) ? f : l;
681 uv = C2d->Value( u );
689 if ( n2 && IsSeamShape( vertexID ))
691 bool isSeam = ( myShape.IsSame( F ));
693 SMESH_MesherHelper h( *myMesh );
695 isSeam = IsSeamShape( vertexID );
699 uv = getUVOnSeam( uv, GetNodeUV( F, n2, 0 ));
705 uvOK = CheckNodeUV( F, n, uv.ChangeCoord(), 2.*getFaceMaxTol( F ));
708 if ( check && !uvOK )
714 //=======================================================================
715 //function : CheckNodeUV
716 //purpose : Check and fix node UV on a face
717 //=======================================================================
719 bool SMESH_MesherHelper::CheckNodeUV(const TopoDS_Face& F,
720 const SMDS_MeshNode* n,
724 double distXYZ[4]) const
726 int shapeID = n->getshapeId();
728 if (( infinit = ( Precision::IsInfinite( uv.X() ) || Precision::IsInfinite( uv.Y() ))) ||
730 ( uv.X() == 0. && uv.Y() == 0. ) ||
731 ( toCheckPosOnShape( shapeID )))
733 // check that uv is correct
735 Handle(Geom_Surface) surface = BRep_Tool::Surface( F,loc );
736 gp_Pnt nodePnt = XYZ( n ), surfPnt(0,0,0);
738 if ( !loc.IsIdentity() ) nodePnt.Transform( loc.Transformation().Inverted() );
740 (dist = nodePnt.Distance( surfPnt = surface->Value( uv.X(), uv.Y() ))) > tol )
742 setPosOnShapeValidity( shapeID, false );
743 if ( !infinit && distXYZ ) {
744 surfPnt.Transform( loc );
746 distXYZ[1] = surfPnt.X(); distXYZ[2] = surfPnt.Y(); distXYZ[3]=surfPnt.Z();
748 // uv incorrect, project the node to surface
749 GeomAPI_ProjectPointOnSurf& projector = GetProjector( F, loc, tol );
750 projector.Perform( nodePnt );
751 if ( !projector.IsDone() || projector.NbPoints() < 1 )
753 MESSAGE( "SMESH_MesherHelper::CheckNodeUV() failed to project" );
756 Quantity_Parameter U,V;
757 projector.LowerDistanceParameters(U,V);
759 surfPnt = surface->Value( U, V );
760 dist = nodePnt.Distance( surfPnt );
762 surfPnt.Transform( loc );
764 distXYZ[1] = surfPnt.X(); distXYZ[2] = surfPnt.Y(); distXYZ[3]=surfPnt.Z();
768 MESSAGE( "SMESH_MesherHelper::CheckNodeUV(), invalid projection" );
771 // store the fixed UV on the face
772 if ( myShape.IsSame(F) && shapeID == myShapeID && myFixNodeParameters )
773 const_cast<SMDS_MeshNode*>(n)->SetPosition
774 ( SMDS_PositionPtr( new SMDS_FacePosition( U, V )));
776 else if ( myShape.IsSame(F) && uv.Modulus() > numeric_limits<double>::min() )
778 setPosOnShapeValidity( shapeID, true );
784 //=======================================================================
785 //function : GetProjector
786 //purpose : Return projector intitialized by given face without location, which is returned
787 //=======================================================================
789 GeomAPI_ProjectPointOnSurf& SMESH_MesherHelper::GetProjector(const TopoDS_Face& F,
790 TopLoc_Location& loc,
793 Handle(Geom_Surface) surface = BRep_Tool::Surface( F,loc );
794 int faceID = GetMeshDS()->ShapeToIndex( F );
795 TID2ProjectorOnSurf& i2proj = const_cast< TID2ProjectorOnSurf&>( myFace2Projector );
796 TID2ProjectorOnSurf::iterator i_proj = i2proj.find( faceID );
797 if ( i_proj == i2proj.end() )
799 if ( tol == 0 ) tol = BRep_Tool::Tolerance( F );
800 double U1, U2, V1, V2;
801 surface->Bounds(U1, U2, V1, V2);
802 GeomAPI_ProjectPointOnSurf* proj = new GeomAPI_ProjectPointOnSurf();
803 proj->Init( surface, U1, U2, V1, V2, tol );
804 i_proj = i2proj.insert( make_pair( faceID, proj )).first;
806 return *( i_proj->second );
811 gp_XY AverageUV(const gp_XY& uv1, const gp_XY& uv2) { return ( uv1 + uv2 ) / 2.; }
812 gp_XY_FunPtr(Added); // define gp_XY_Added pointer to function calling gp_XY::Added(gp_XY)
813 gp_XY_FunPtr(Subtracted);
816 //=======================================================================
817 //function : ApplyIn2D
818 //purpose : Perform given operation on two 2d points in parameric space of given surface.
819 // It takes into account period of the surface. Use gp_XY_FunPtr macro
820 // to easily define pointer to function of gp_XY class.
821 //=======================================================================
823 gp_XY SMESH_MesherHelper::ApplyIn2D(Handle(Geom_Surface) surface,
827 const bool resultInPeriod)
829 if ( surface->IsKind(STANDARD_TYPE(Geom_RectangularTrimmedSurface )))
830 surface = Handle(Geom_RectangularTrimmedSurface)::DownCast( surface )->BasisSurface();
831 Standard_Boolean isUPeriodic = surface.IsNull() ? false : surface->IsUPeriodic();
832 Standard_Boolean isVPeriodic = surface.IsNull() ? false : surface->IsVPeriodic();
833 if ( !isUPeriodic && !isVPeriodic )
836 // move uv2 not far than half-period from uv1
838 uv2.X()+(isUPeriodic ? ShapeAnalysis::AdjustByPeriod(uv2.X(),uv1.X(),surface->UPeriod()) :0);
840 uv2.Y()+(isVPeriodic ? ShapeAnalysis::AdjustByPeriod(uv2.Y(),uv1.Y(),surface->VPeriod()) :0);
843 gp_XY res = fun( uv1, gp_XY(u2,v2) );
845 // move result within period
846 if ( resultInPeriod )
848 Standard_Real UF,UL,VF,VL;
849 surface->Bounds(UF,UL,VF,VL);
851 res.SetX( res.X() + ShapeAnalysis::AdjustToPeriod(res.X(),UF,UL));
853 res.SetY( res.Y() + ShapeAnalysis::AdjustToPeriod(res.Y(),VF,VL));
859 //=======================================================================
860 //function : AdjustByPeriod
861 //purpose : Move node positions on a FACE within surface period
862 //=======================================================================
864 void SMESH_MesherHelper::AdjustByPeriod( const TopoDS_Face& face, gp_XY uv[], const int nbUV )
866 SMESH_MesherHelper h( *myMesh ), *ph = face.IsSame( myShape ) ? this : &h;
867 ph->SetSubShape( face );
869 for ( int iCoo = U_periodic; iCoo <= V_periodic; ++iCoo )
870 if ( ph->GetPeriodicIndex() & iCoo )
872 const double period = ( ph->myPar2[iCoo-1] - ph->myPar1[iCoo-1] );
873 const double xRef = uv[0].Coord( iCoo );
874 for ( int i = 1; i < nbUV; ++i )
876 double x = uv[i].Coord( iCoo );
877 double dx = ShapeAnalysis::AdjustByPeriod( x, xRef, period );
878 uv[i].SetCoord( iCoo, x + dx );
883 //=======================================================================
884 //function : GetMiddleUV
885 //purpose : Return middle UV taking in account surface period
886 //=======================================================================
888 gp_XY SMESH_MesherHelper::GetMiddleUV(const Handle(Geom_Surface)& surface,
893 // the proper place of getting basic surface seems to be in ApplyIn2D()
894 // but we put it here to decrease a risk of regressions just before releasing a version
895 // Handle(Geom_Surface) surf = surface;
896 // while ( !surf.IsNull() && surf->IsKind(STANDARD_TYPE(Geom_RectangularTrimmedSurface )))
897 // surf = Handle(Geom_RectangularTrimmedSurface)::DownCast( surf )->BasisSurface();
899 return ApplyIn2D( surface, p1, p2, & AverageUV );
902 //=======================================================================
903 //function : GetCenterUV
904 //purpose : Return UV for the central node of a biquadratic triangle
905 //=======================================================================
907 gp_XY SMESH_MesherHelper::GetCenterUV(const gp_XY& uv1,
913 bool * isBadTria/*=0*/)
916 gp_XY uvAvg = ( uv12 + uv23 + uv31 ) / 3.;
918 if (( badTria = (( uvAvg - uv1 ) * ( uvAvg - uv23 ) > 0 )))
919 uvAvg = ( uv1 + uv23 ) / 2.;
920 else if (( badTria = (( uvAvg - uv2 ) * ( uvAvg - uv31 ) > 0 )))
921 uvAvg = ( uv2 + uv31 ) / 2.;
922 else if (( badTria = (( uvAvg - uv3 ) * ( uvAvg - uv12 ) > 0 )))
923 uvAvg = ( uv3 + uv12 ) / 2.;
926 *isBadTria = badTria;
930 //=======================================================================
931 //function : GetNodeU
932 //purpose : Return node U on edge
933 //=======================================================================
935 double SMESH_MesherHelper::GetNodeU(const TopoDS_Edge& E,
936 const SMDS_MeshNode* n,
937 const SMDS_MeshNode* inEdgeNode,
940 double param = Precision::Infinite();
942 const SMDS_PositionPtr pos = n->GetPosition();
943 if ( pos->GetTypeOfPosition()==SMDS_TOP_EDGE )
945 const SMDS_EdgePosition* epos = static_cast<const SMDS_EdgePosition*>( pos );
946 param = epos->GetUParameter();
948 else if( pos->GetTypeOfPosition() == SMDS_TOP_VERTEX )
950 if ( inEdgeNode && TopExp::FirstVertex( E ).IsSame( TopExp::LastVertex( E ))) // issue 0020128
953 BRep_Tool::Range( E, f,l );
954 double uInEdge = GetNodeU( E, inEdgeNode );
955 param = ( fabs( uInEdge - f ) < fabs( l - uInEdge )) ? f : l;
959 SMESHDS_Mesh * meshDS = GetMeshDS();
960 int vertexID = n->getshapeId();
961 const TopoDS_Vertex& V = TopoDS::Vertex(meshDS->IndexToShape(vertexID));
962 param = BRep_Tool::Parameter( V, E );
967 double tol = BRep_Tool::Tolerance( E );
968 double f,l; BRep_Tool::Range( E, f,l );
969 bool force = ( param < f-tol || param > l+tol );
970 if ( !force && pos->GetTypeOfPosition()==SMDS_TOP_EDGE )
971 force = ( GetMeshDS()->ShapeToIndex( E ) != n->getshapeId() );
973 *check = CheckNodeU( E, n, param, 2*tol, force );
978 //=======================================================================
979 //function : CheckNodeU
980 //purpose : Check and fix node U on an edge
981 // Return false if U is bad and could not be fixed
982 //=======================================================================
984 bool SMESH_MesherHelper::CheckNodeU(const TopoDS_Edge& E,
985 const SMDS_MeshNode* n,
989 double distXYZ[4]) const
991 int shapeID = n->getshapeId();
993 if (( infinit = Precision::IsInfinite( u )) ||
996 ( toCheckPosOnShape( shapeID )))
998 TopLoc_Location loc; double f,l;
999 Handle(Geom_Curve) curve = BRep_Tool::Curve( E,loc,f,l );
1000 if ( curve.IsNull() ) // degenerated edge
1002 if ( u+tol < f || u-tol > l )
1004 double r = Max( 0.5, 1 - tol*n->GetID()); // to get a unique u on edge
1010 gp_Pnt nodePnt = SMESH_TNodeXYZ( n );
1011 if ( !loc.IsIdentity() ) nodePnt.Transform( loc.Transformation().Inverted() );
1013 double dist = 2*tol;
1016 curvPnt = curve->Value( u );
1017 dist = nodePnt.Distance( curvPnt );
1019 curvPnt.Transform( loc );
1021 distXYZ[1] = curvPnt.X(); distXYZ[2] = curvPnt.Y(); distXYZ[3]=curvPnt.Z();
1026 setPosOnShapeValidity( shapeID, false );
1027 // u incorrect, project the node to the curve
1028 int edgeID = GetMeshDS()->ShapeToIndex( E );
1029 TID2ProjectorOnCurve& i2proj = const_cast< TID2ProjectorOnCurve&>( myEdge2Projector );
1030 TID2ProjectorOnCurve::iterator i_proj =
1031 i2proj.insert( make_pair( edgeID, (GeomAPI_ProjectPointOnCurve*) 0 )).first;
1032 if ( !i_proj->second )
1034 i_proj->second = new GeomAPI_ProjectPointOnCurve();
1035 i_proj->second->Init( curve, f, l );
1037 GeomAPI_ProjectPointOnCurve* projector = i_proj->second;
1038 projector->Perform( nodePnt );
1039 if ( projector->NbPoints() < 1 )
1041 MESSAGE( "SMESH_MesherHelper::CheckNodeU() failed to project" );
1044 Quantity_Parameter U = projector->LowerDistanceParameter();
1046 MESSAGE(" f " << f << " l " << l << " u " << u);
1047 curvPnt = curve->Value( u );
1048 dist = nodePnt.Distance( curvPnt );
1050 curvPnt.Transform( loc );
1052 distXYZ[1] = curvPnt.X(); distXYZ[2] = curvPnt.Y(); distXYZ[3]=curvPnt.Z();
1056 MESSAGE( "SMESH_MesherHelper::CheckNodeU(), invalid projection" );
1057 MESSAGE("distance " << dist << " " << tol );
1060 // store the fixed U on the edge
1061 if ( myShape.IsSame(E) && shapeID == myShapeID && myFixNodeParameters )
1062 const_cast<SMDS_MeshNode*>(n)->SetPosition
1063 ( SMDS_PositionPtr( new SMDS_EdgePosition( U )));
1065 else if ( fabs( u ) > numeric_limits<double>::min() )
1067 setPosOnShapeValidity( shapeID, true );
1069 if (( u < f-tol || u > l+tol ) && force )
1071 MESSAGE("u < f-tol || u > l+tol ; u " << u << " f " << f << " l " << l);
1072 // node is on vertex but is set on periodic but trimmed edge (issue 0020890)
1075 // do not use IsPeriodic() as Geom_TrimmedCurve::IsPeriodic () returns false
1076 double period = curve->Period();
1077 u = ( u < f ) ? u + period : u - period;
1079 catch (Standard_Failure& exc)
1089 //=======================================================================
1090 //function : GetMediumPos
1091 //purpose : Return index and type of the shape (EDGE or FACE only) to
1092 // set a medium node on
1093 //param : useCurSubShape - if true, returns the shape set via SetSubShape()
1095 //param : expectedSupport - shape type corresponding to element being created,
1096 // e.g TopAbs_EDGE if SMDSAbs_Edge is created
1097 // basing on \a n1 and \a n2
1098 // Calling GetMediumPos() with useCurSubShape=true is OK only for the
1099 // case where the lower dim mesh is already constructed and converted to quadratic,
1100 // else, nodes on EDGEs are assigned to FACE, for example.
1101 //=======================================================================
1103 std::pair<int, TopAbs_ShapeEnum>
1104 SMESH_MesherHelper::GetMediumPos(const SMDS_MeshNode* n1,
1105 const SMDS_MeshNode* n2,
1106 const bool useCurSubShape,
1107 TopAbs_ShapeEnum expectedSupport)
1109 if ( useCurSubShape && !myShape.IsNull() )
1110 return std::make_pair( myShapeID, myShape.ShapeType() );
1112 TopAbs_ShapeEnum shapeType = TopAbs_SHAPE;
1116 if (( myShapeID == n1->getshapeId() || myShapeID == n2->getshapeId() ) && myShapeID > 0 )
1118 shapeType = myShape.ShapeType();
1119 shapeID = myShapeID;
1121 else if ( n1->getshapeId() == n2->getshapeId() )
1123 shapeID = n2->getshapeId();
1124 shape = GetSubShapeByNode( n1, GetMeshDS() );
1126 else // 2 different shapes
1128 const SMDS_TypeOfPosition Pos1 = n1->GetPosition()->GetTypeOfPosition();
1129 const SMDS_TypeOfPosition Pos2 = n2->GetPosition()->GetTypeOfPosition();
1131 if ( Pos1 == SMDS_TOP_3DSPACE || Pos2 == SMDS_TOP_3DSPACE )
1135 else if ( Pos1 == SMDS_TOP_FACE || Pos2 == SMDS_TOP_FACE )
1138 if ( Pos1 != SMDS_TOP_FACE || Pos2 != SMDS_TOP_FACE ) // not 2 FACEs
1140 if ( Pos1 != SMDS_TOP_FACE ) std::swap( n1,n2 );
1141 TopoDS_Shape F = GetSubShapeByNode( n1, GetMeshDS() );
1142 TopoDS_Shape S = GetSubShapeByNode( n2, GetMeshDS() );
1143 if ( IsSubShape( S, F ))
1145 shapeType = TopAbs_FACE;
1146 shapeID = n1->getshapeId();
1150 else if ( Pos1 == SMDS_TOP_EDGE && Pos2 == SMDS_TOP_EDGE )
1152 TopoDS_Shape E1 = GetSubShapeByNode( n1, GetMeshDS() );
1153 TopoDS_Shape E2 = GetSubShapeByNode( n2, GetMeshDS() );
1154 shape = GetCommonAncestor( E1, E2, *myMesh, TopAbs_FACE );
1156 else if ( Pos1 == SMDS_TOP_VERTEX && Pos2 == SMDS_TOP_VERTEX )
1158 TopoDS_Shape V1 = GetSubShapeByNode( n1, GetMeshDS() );
1159 TopoDS_Shape V2 = GetSubShapeByNode( n2, GetMeshDS() );
1160 shape = GetCommonAncestor( V1, V2, *myMesh, TopAbs_EDGE );
1161 if ( shape.IsNull() ) shape = GetCommonAncestor( V1, V2, *myMesh, TopAbs_FACE );
1163 else // on VERTEX and EDGE
1165 if ( Pos1 != SMDS_TOP_VERTEX ) std::swap( n1,n2 );
1166 TopoDS_Shape V = GetSubShapeByNode( n1, GetMeshDS() );
1167 TopoDS_Shape E = GetSubShapeByNode( n2, GetMeshDS() );
1168 if ( IsSubShape( V, E ))
1171 shape = GetCommonAncestor( V, E, *myMesh, TopAbs_FACE );
1175 if ( !shape.IsNull() )
1178 shapeID = GetMeshDS()->ShapeToIndex( shape );
1179 shapeType = shape.ShapeType(); // EDGE or FACE
1181 if ( expectedSupport < shapeType &&
1182 expectedSupport != TopAbs_SHAPE &&
1183 !myShape.IsNull() &&
1184 myShape.ShapeType() == expectedSupport )
1186 // e.g. a side of triangle connects nodes on the same EDGE but does not
1187 // lie on this EDGE (an arc with a coarse mesh)
1188 // => shapeType == TopAbs_EDGE, expectedSupport == TopAbs_FACE;
1189 // hope that myShape is a right shape, return it if the found shape
1190 // has converted elements of corresponding dim (segments in our example)
1191 int nbConvertedElems = 0;
1192 SMDSAbs_ElementType type = ( shapeType == TopAbs_FACE ? SMDSAbs_Face : SMDSAbs_Edge );
1193 for ( int iN = 0; iN < 2; ++iN )
1195 const SMDS_MeshNode* n = iN ? n2 : n1;
1196 SMDS_ElemIteratorPtr it = n->GetInverseElementIterator( type );
1197 while ( it->more() )
1199 const SMDS_MeshElement* elem = it->next();
1200 if ( elem->getshapeId() == shapeID &&
1201 elem->IsQuadratic() )
1208 if ( nbConvertedElems == 2 )
1210 shapeType = myShape.ShapeType();
1211 shapeID = myShapeID;
1215 return make_pair( shapeID, shapeType );
1218 //=======================================================================
1219 //function : GetCentralNode
1220 //purpose : Return existing or create a new central node for a quardilateral
1221 // quadratic face given its 8 nodes.
1222 //@param : force3d - true means node creation in between the given nodes,
1223 // else node position is found on a geometrical face if any.
1224 //=======================================================================
1226 const SMDS_MeshNode* SMESH_MesherHelper::GetCentralNode(const SMDS_MeshNode* n1,
1227 const SMDS_MeshNode* n2,
1228 const SMDS_MeshNode* n3,
1229 const SMDS_MeshNode* n4,
1230 const SMDS_MeshNode* n12,
1231 const SMDS_MeshNode* n23,
1232 const SMDS_MeshNode* n34,
1233 const SMDS_MeshNode* n41,
1236 SMDS_MeshNode *centralNode = 0; // central node to return
1238 // Find an existing central node
1240 TBiQuad keyOfMap(n1,n2,n3,n4);
1241 std::map<TBiQuad, const SMDS_MeshNode* >::iterator itMapCentralNode;
1242 itMapCentralNode = myMapWithCentralNode.find( keyOfMap );
1243 if ( itMapCentralNode != myMapWithCentralNode.end() )
1245 return (*itMapCentralNode).second;
1248 // Get type of shape for the new central node
1250 TopAbs_ShapeEnum shapeType = TopAbs_SHAPE;
1254 TopTools_ListIteratorOfListOfShape it;
1256 std::map< int, int > faceId2nbNodes;
1257 std::map< int, int > ::iterator itMapWithIdFace;
1259 SMESHDS_Mesh* meshDS = GetMeshDS();
1261 // check if a face lies on a FACE, i.e. its all corner nodes lie either on the FACE or
1262 // on sub-shapes of the FACE
1263 if ( GetMesh()->HasShapeToMesh() )
1265 const SMDS_MeshNode* nodes[] = { n1, n2, n3, n4 };
1266 for(int i = 0; i < 4; i++)
1268 shape = GetSubShapeByNode( nodes[i], meshDS );
1269 if ( shape.IsNull() ) break;
1270 if ( shape.ShapeType() == TopAbs_SOLID )
1272 solidID = nodes[i]->getshapeId();
1273 shapeType = TopAbs_SOLID;
1276 if ( shape.ShapeType() == TopAbs_FACE )
1278 faceID = nodes[i]->getshapeId();
1279 itMapWithIdFace = faceId2nbNodes.insert( std::make_pair( faceID, 0 ) ).first;
1280 itMapWithIdFace->second++;
1284 PShapeIteratorPtr it = GetAncestors( shape, *GetMesh(), TopAbs_FACE );
1285 while ( const TopoDS_Shape* face = it->next() )
1287 faceID = meshDS->ShapeToIndex( *face );
1288 itMapWithIdFace = faceId2nbNodes.insert( std::make_pair( faceID, 0 )).first;
1289 itMapWithIdFace->second++;
1294 if ( solidID < 1 && !faceId2nbNodes.empty() ) // SOLID not found
1296 // find ID of the FACE the four corner nodes belong to
1297 itMapWithIdFace = faceId2nbNodes.find( myShapeID ); // IPAL52698
1298 if ( itMapWithIdFace != faceId2nbNodes.end() &&
1299 itMapWithIdFace->second == 4 )
1301 shapeType = TopAbs_FACE;
1306 itMapWithIdFace = faceId2nbNodes.begin();
1307 for ( ; itMapWithIdFace != faceId2nbNodes.end(); ++itMapWithIdFace)
1309 if ( itMapWithIdFace->second == 4 )
1311 shapeType = TopAbs_FACE;
1312 faceID = (*itMapWithIdFace).first;
1320 if ( shapeType == TopAbs_FACE )
1322 F = TopoDS::Face( meshDS->IndexToShape( faceID ));
1329 bool toCheck = true;
1330 if ( !F.IsNull() && !force3d )
1333 GetNodeUV( F,n1, n3, &toCheck ),
1334 GetNodeUV( F,n2, n4, &toCheck ),
1335 GetNodeUV( F,n3, n1, &toCheck ),
1336 GetNodeUV( F,n4, n2, &toCheck ),
1337 GetNodeUV( F,n12, n3 ),
1338 GetNodeUV( F,n23, n4 ),
1339 GetNodeUV( F,n34, n2 ),
1340 GetNodeUV( F,n41, n2 )
1342 AdjustByPeriod( F, uv, 8 ); // put uv[] within a period (IPAL52698)
1344 uvAvg = calcTFI (0.5, 0.5, uv[0],uv[1],uv[2],uv[3], uv[4],uv[5],uv[6],uv[7] );
1346 TopLoc_Location loc;
1347 Handle( Geom_Surface ) S = BRep_Tool::Surface( F, loc );
1348 P = S->Value( uvAvg.X(), uvAvg.Y() ).Transformed( loc );
1349 centralNode = meshDS->AddNode( P.X(), P.Y(), P.Z() );
1350 // if ( mySetElemOnShape ) node is not elem!
1351 meshDS->SetNodeOnFace( centralNode, faceID, uvAvg.X(), uvAvg.Y() );
1353 else // ( force3d || F.IsNull() )
1355 P = calcTFI (0.5, 0.5,
1356 SMESH_TNodeXYZ(n1), SMESH_TNodeXYZ(n2),
1357 SMESH_TNodeXYZ(n3), SMESH_TNodeXYZ(n4),
1358 SMESH_TNodeXYZ(n12), SMESH_TNodeXYZ(n23),
1359 SMESH_TNodeXYZ(n34), SMESH_TNodeXYZ(n41));
1360 centralNode = meshDS->AddNode( P.X(), P.Y(), P.Z() );
1362 if ( !F.IsNull() ) // force3d
1364 uvAvg = (GetNodeUV(F,n1,n3,&toCheck) +
1365 GetNodeUV(F,n2,n4,&toCheck) +
1366 GetNodeUV(F,n3,n1,&toCheck) +
1367 GetNodeUV(F,n4,n2,&toCheck)) / 4;
1368 //CheckNodeUV( F, centralNode, uvAvg, 2*BRep_Tool::Tolerance( F ), /*force=*/true);
1369 meshDS->SetNodeOnFace( centralNode, faceID, uvAvg.X(), uvAvg.Y() );
1371 else if ( solidID > 0 )
1373 meshDS->SetNodeInVolume( centralNode, solidID );
1375 else if ( myShapeID > 0 && mySetElemOnShape )
1377 meshDS->SetMeshElementOnShape( centralNode, myShapeID );
1380 myMapWithCentralNode.insert( std::make_pair( keyOfMap, centralNode ) );
1384 //=======================================================================
1385 //function : GetCentralNode
1386 //purpose : Return existing or create a new central node for a
1387 // quadratic triangle given its 6 nodes.
1388 //@param : force3d - true means node creation in between the given nodes,
1389 // else node position is found on a geometrical face if any.
1390 //=======================================================================
1392 const SMDS_MeshNode* SMESH_MesherHelper::GetCentralNode(const SMDS_MeshNode* n1,
1393 const SMDS_MeshNode* n2,
1394 const SMDS_MeshNode* n3,
1395 const SMDS_MeshNode* n12,
1396 const SMDS_MeshNode* n23,
1397 const SMDS_MeshNode* n31,
1400 SMDS_MeshNode *centralNode = 0; // central node to return
1402 // Find an existing central node
1404 TBiQuad keyOfMap(n1,n2,n3);
1405 std::map<TBiQuad, const SMDS_MeshNode* >::iterator itMapCentralNode;
1406 itMapCentralNode = myMapWithCentralNode.find( keyOfMap );
1407 if ( itMapCentralNode != myMapWithCentralNode.end() )
1409 return (*itMapCentralNode).second;
1412 // Get type of shape for the new central node
1414 TopAbs_ShapeEnum shapeType = TopAbs_SHAPE;
1418 TopTools_ListIteratorOfListOfShape it;
1420 std::map< int, int > faceId2nbNodes;
1421 std::map< int, int > ::iterator itMapWithIdFace;
1423 SMESHDS_Mesh* meshDS = GetMeshDS();
1425 // check if a face lies on a FACE, i.e. its all corner nodes lie either on the FACE or
1426 // on sub-shapes of the FACE
1427 if ( GetMesh()->HasShapeToMesh() )
1429 const SMDS_MeshNode* nodes[] = { n1, n2, n3 };
1430 for(int i = 0; i < 3; i++)
1432 shape = GetSubShapeByNode( nodes[i], meshDS );
1433 if ( shape.IsNull() ) break;
1434 if ( shape.ShapeType() == TopAbs_SOLID )
1436 solidID = nodes[i]->getshapeId();
1437 shapeType = TopAbs_SOLID;
1440 if ( shape.ShapeType() == TopAbs_FACE )
1442 faceID = nodes[i]->getshapeId();
1443 itMapWithIdFace = faceId2nbNodes.insert( std::make_pair( faceID, 0 ) ).first;
1444 itMapWithIdFace->second++;
1448 PShapeIteratorPtr it = GetAncestors(shape, *GetMesh(), TopAbs_FACE );
1449 while ( const TopoDS_Shape* face = it->next() )
1451 faceID = meshDS->ShapeToIndex( *face );
1452 itMapWithIdFace = faceId2nbNodes.insert( std::make_pair( faceID, 0 ) ).first;
1453 itMapWithIdFace->second++;
1458 if ( solidID < 1 && !faceId2nbNodes.empty() ) // SOLID not found
1460 // find ID of the FACE the four corner nodes belong to
1461 itMapWithIdFace = faceId2nbNodes.find( myShapeID ); // IPAL52698
1462 if ( itMapWithIdFace != faceId2nbNodes.end() &&
1463 itMapWithIdFace->second == 4 )
1465 shapeType = TopAbs_FACE;
1470 itMapWithIdFace = faceId2nbNodes.begin();
1471 for ( ; itMapWithIdFace != faceId2nbNodes.end(); ++itMapWithIdFace)
1473 if ( itMapWithIdFace->second == 3 )
1475 shapeType = TopAbs_FACE;
1476 faceID = (*itMapWithIdFace).first;
1486 if ( shapeType == TopAbs_FACE )
1488 F = TopoDS::Face( meshDS->IndexToShape( faceID ));
1489 bool checkOK = true, badTria = false;
1491 GetNodeUV( F, n1, n23, &checkOK ),
1492 GetNodeUV( F, n2, n31, &checkOK ),
1493 GetNodeUV( F, n3, n12, &checkOK ),
1494 GetNodeUV( F, n12, n3, &checkOK ),
1495 GetNodeUV( F, n23, n1, &checkOK ),
1496 GetNodeUV( F, n31, n2, &checkOK )
1498 AdjustByPeriod( F, uv, 6 ); // put uv[] within a period (IPAL52698)
1500 uvAvg = GetCenterUV( uv[0],uv[1],uv[2], uv[3],uv[4],uv[5], &badTria );
1502 if ( badTria || !checkOK )
1506 // Create a central node
1509 if ( !F.IsNull() && !force3d )
1511 TopLoc_Location loc;
1512 Handle( Geom_Surface ) S = BRep_Tool::Surface( F, loc );
1513 P = S->Value( uvAvg.X(), uvAvg.Y() ).Transformed( loc );
1514 centralNode = meshDS->AddNode( P.X(), P.Y(), P.Z() );
1515 // if ( mySetElemOnShape ) node is not elem!
1516 meshDS->SetNodeOnFace( centralNode, faceID, uvAvg.X(), uvAvg.Y() );
1518 else // ( force3d || F.IsNull() )
1520 P = ( SMESH_TNodeXYZ( n12 ) +
1521 SMESH_TNodeXYZ( n23 ) +
1522 SMESH_TNodeXYZ( n31 ) ) / 3;
1523 centralNode = meshDS->AddNode( P.X(), P.Y(), P.Z() );
1525 if ( !F.IsNull() ) // force3d
1527 meshDS->SetNodeOnFace( centralNode, faceID, uvAvg.X(), uvAvg.Y() );
1529 else if ( solidID > 0 )
1531 meshDS->SetNodeInVolume( centralNode, solidID );
1533 else if ( myShapeID > 0 && mySetElemOnShape )
1535 meshDS->SetMeshElementOnShape( centralNode, myShapeID );
1538 myMapWithCentralNode.insert( std::make_pair( keyOfMap, centralNode ) );
1542 //=======================================================================
1543 //function : GetMediumNode
1544 //purpose : Return existing or create a new medium node between given ones
1545 //=======================================================================
1547 const SMDS_MeshNode* SMESH_MesherHelper::GetMediumNode(const SMDS_MeshNode* n1,
1548 const SMDS_MeshNode* n2,
1550 TopAbs_ShapeEnum expectedSupport)
1552 // Find existing node
1554 SMESH_TLink link(n1,n2);
1555 ItTLinkNode itLN = myTLinkNodeMap.find( link );
1556 if ( itLN != myTLinkNodeMap.end() ) {
1557 return (*itLN).second;
1560 // Create medium node
1563 SMESHDS_Mesh* meshDS = GetMeshDS();
1565 if ( IsSeamShape( n1->getshapeId() ))
1566 // to get a correct UV of a node on seam, the second node must have checked UV
1567 std::swap( n1, n2 );
1569 // get type of shape for the new medium node
1570 int faceID = -1, edgeID = -1;
1571 TopoDS_Edge E; double u [2];
1572 TopoDS_Face F; gp_XY uv[2];
1573 bool uvOK[2] = { true, true };
1574 const bool useCurSubShape = ( !myShape.IsNull() && myShape.ShapeType() == TopAbs_EDGE );
1576 pair<int, TopAbs_ShapeEnum> pos = GetMediumPos( n1, n2, useCurSubShape, expectedSupport );
1578 // get positions of the given nodes on shapes
1579 if ( pos.second == TopAbs_FACE )
1581 F = TopoDS::Face(meshDS->IndexToShape( faceID = pos.first ));
1582 uv[0] = GetNodeUV(F,n1,n2, force3d ? 0 : &uvOK[0]);
1583 uv[1] = GetNodeUV(F,n2,n1, force3d ? 0 : &uvOK[1]);
1585 else if ( pos.second == TopAbs_EDGE )
1587 const SMDS_PositionPtr Pos1 = n1->GetPosition();
1588 const SMDS_PositionPtr Pos2 = n2->GetPosition();
1589 if ( Pos1->GetTypeOfPosition()==SMDS_TOP_EDGE &&
1590 Pos2->GetTypeOfPosition()==SMDS_TOP_EDGE &&
1591 n1->getshapeId() != n2->getshapeId() )
1594 return getMediumNodeOnComposedWire(n1,n2,force3d);
1596 E = TopoDS::Edge(meshDS->IndexToShape( edgeID = pos.first ));
1598 u[0] = GetNodeU(E,n1,n2, force3d ? 0 : &uvOK[0]);
1599 u[1] = GetNodeU(E,n2,n1, force3d ? 0 : &uvOK[1]);
1601 catch ( Standard_Failure& f )
1603 // issue 22502 / a node is on VERTEX not belonging to E
1604 // issue 22568 / both nodes are on non-connected VERTEXes
1605 return getMediumNodeOnComposedWire(n1,n2,force3d);
1609 if ( !force3d & uvOK[0] && uvOK[1] )
1611 // we try to create medium node using UV parameters of
1612 // nodes, else - medium between corresponding 3d points
1615 //if ( uvOK[0] && uvOK[1] )
1617 if ( IsDegenShape( n1->getshapeId() )) {
1618 if ( myParIndex & U_periodic ) uv[0].SetCoord( 1, uv[1].Coord( 1 ));
1619 else uv[0].SetCoord( 2, uv[1].Coord( 2 ));
1621 else if ( IsDegenShape( n2->getshapeId() )) {
1622 if ( myParIndex & U_periodic ) uv[1].SetCoord( 1, uv[0].Coord( 1 ));
1623 else uv[1].SetCoord( 2, uv[0].Coord( 2 ));
1625 TopLoc_Location loc;
1626 Handle(Geom_Surface) S = BRep_Tool::Surface(F,loc);
1627 gp_XY UV = GetMiddleUV( S, uv[0], uv[1] );
1628 gp_Pnt P = S->Value( UV.X(), UV.Y() ).Transformed(loc);
1629 n12 = meshDS->AddNode(P.X(), P.Y(), P.Z());
1630 // if ( mySetElemOnShape ) node is not elem!
1631 meshDS->SetNodeOnFace(n12, faceID, UV.X(), UV.Y());
1632 myTLinkNodeMap.insert(make_pair(link,n12));
1636 else if ( !E.IsNull() )
1639 Handle(Geom_Curve) C = BRep_Tool::Curve(E, f, l);
1642 Standard_Boolean isPeriodic = C->IsPeriodic();
1645 Standard_Real Period = C->Period();
1646 Standard_Real p = u[1]+ShapeAnalysis::AdjustByPeriod(u[1],u[0],Period);
1647 Standard_Real pmid = (u[0]+p)/2.;
1648 U = pmid+ShapeAnalysis::AdjustToPeriod(pmid,C->FirstParameter(),C->LastParameter());
1653 gp_Pnt P = C->Value( U );
1654 n12 = meshDS->AddNode(P.X(), P.Y(), P.Z());
1655 //if ( mySetElemOnShape ) node is not elem!
1656 meshDS->SetNodeOnEdge(n12, edgeID, U);
1657 myTLinkNodeMap.insert(make_pair(link,n12));
1664 double x = ( n1->X() + n2->X() )/2.;
1665 double y = ( n1->Y() + n2->Y() )/2.;
1666 double z = ( n1->Z() + n2->Z() )/2.;
1667 n12 = meshDS->AddNode(x,y,z);
1669 //if ( mySetElemOnShape ) node is not elem!
1673 gp_XY UV = ( uv[0] + uv[1] ) / 2.;
1674 CheckNodeUV( F, n12, UV, 2 * BRep_Tool::Tolerance( F ), /*force=*/true);
1675 meshDS->SetNodeOnFace(n12, faceID, UV.X(), UV.Y() );
1677 else if ( !E.IsNull() )
1679 double U = ( u[0] + u[1] ) / 2.;
1680 CheckNodeU( E, n12, U, 2 * BRep_Tool::Tolerance( E ), /*force=*/true);
1681 meshDS->SetNodeOnEdge(n12, edgeID, U);
1683 else if ( myShapeID > 0 && mySetElemOnShape )
1685 meshDS->SetMeshElementOnShape(n12, myShapeID);
1689 myTLinkNodeMap.insert( make_pair( link, n12 ));
1693 //================================================================================
1695 * \brief Makes a medium node if nodes reside different edges
1697 //================================================================================
1699 const SMDS_MeshNode* SMESH_MesherHelper::getMediumNodeOnComposedWire(const SMDS_MeshNode* n1,
1700 const SMDS_MeshNode* n2,
1703 SMESH_TNodeXYZ p1( n1 ), p2( n2 );
1704 gp_Pnt middle = 0.5 * p1 + 0.5 * p2;
1705 SMDS_MeshNode* n12 = AddNode( middle.X(), middle.Y(), middle.Z() );
1707 // To find position on edge and 3D position for n12,
1708 // project <middle> to 2 edges and select projection most close to <middle>
1710 TopoDS_Edge bestEdge;
1711 double u = 0, distMiddleProj = Precision::Infinite(), distXYZ[4], f,l;
1713 // get shapes under the nodes
1714 TopoDS_Shape shape[2];
1716 for ( int is2nd = 0; is2nd < 2; ++is2nd )
1718 const SMDS_MeshNode* n = is2nd ? n2 : n1;
1719 TopoDS_Shape S = GetSubShapeByNode( n, GetMeshDS() );
1721 shape[ nbShapes++ ] = S;
1724 vector< TopoDS_Shape > edges;
1725 for ( int iS = 0; iS < nbShapes; ++iS )
1727 switch ( shape[iS].ShapeType() ) {
1730 edges.push_back( shape[iS] );
1736 if ( nbShapes == 2 && iS==0 && shape[1-iS].ShapeType() == TopAbs_VERTEX )
1737 edge = GetCommonAncestor( shape[iS], shape[1-iS], *myMesh, TopAbs_EDGE );
1739 if ( edge.IsNull() )
1741 PShapeIteratorPtr eIt = GetAncestors( shape[iS], *myMesh, TopAbs_EDGE );
1742 while( const TopoDS_Shape* e = eIt->next() )
1743 edges.push_back( *e );
1749 if ( nbShapes == 1 || shape[1-iS].ShapeType() < TopAbs_EDGE )
1750 for ( TopExp_Explorer e( shape[iS], TopAbs_EDGE ); e.More(); e.Next() )
1751 edges.push_back( e.Current() );
1758 // project to get U of projection and distance from middle to projection
1759 for ( size_t iE = 0; iE < edges.size(); ++iE )
1761 const TopoDS_Edge& edge = TopoDS::Edge( edges[ iE ]);
1762 distXYZ[0] = distMiddleProj;
1764 CheckNodeU( edge, n12, testU, 2 * BRep_Tool::Tolerance(edge), /*force=*/true, distXYZ );
1765 if ( distXYZ[0] < distMiddleProj )
1767 distMiddleProj = distXYZ[0];
1773 // // both projections failed; set n12 on the edge of n1 with U of a common vertex
1774 // TopoDS_Vertex vCommon;
1775 // if ( TopExp::CommonVertex( edges[0], edges[1], vCommon ))
1776 // u = BRep_Tool::Parameter( vCommon, edges[0] );
1779 // double f,l, u0 = GetNodeU( edges[0], n1 );
1780 // BRep_Tool::Range( edges[0],f,l );
1781 // u = ( fabs(u0-f) < fabs(u0-l) ) ? f : l;
1784 // distMiddleProj = 0;
1787 if ( !bestEdge.IsNull() )
1789 // move n12 to position of a successfull projection
1790 //double tol = BRep_Tool::Tolerance(edges[ iOkEdge ]);
1791 if ( !force3d /*&& distMiddleProj > 2*tol*/ )
1793 TopLoc_Location loc;
1794 Handle(Geom_Curve) curve = BRep_Tool::Curve( bestEdge,loc,f,l );
1795 gp_Pnt p = curve->Value( u ).Transformed( loc );
1796 GetMeshDS()->MoveNode( n12, p.X(), p.Y(), p.Z() );
1798 //if ( mySetElemOnShape ) node is not elem!
1800 int edgeID = GetMeshDS()->ShapeToIndex( bestEdge );
1801 if ( edgeID != n12->getshapeId() )
1802 GetMeshDS()->UnSetNodeOnShape( n12 );
1803 GetMeshDS()->SetNodeOnEdge(n12, edgeID, u);
1806 myTLinkNodeMap.insert( make_pair( SMESH_TLink(n1,n2), n12 ));
1811 //=======================================================================
1812 //function : AddNode
1813 //purpose : Creates a node
1814 //=======================================================================
1816 SMDS_MeshNode* SMESH_MesherHelper::AddNode(double x, double y, double z, int ID,
1819 SMESHDS_Mesh * meshDS = GetMeshDS();
1820 SMDS_MeshNode* node = 0;
1822 node = meshDS->AddNodeWithID( x, y, z, ID );
1824 node = meshDS->AddNode( x, y, z );
1825 if ( mySetElemOnShape && myShapeID > 0 ) { // node is not elem ?
1826 switch ( myShape.ShapeType() ) {
1827 case TopAbs_SOLID: meshDS->SetNodeInVolume( node, myShapeID); break;
1828 case TopAbs_SHELL: meshDS->SetNodeInVolume( node, myShapeID); break;
1829 case TopAbs_FACE: meshDS->SetNodeOnFace( node, myShapeID, u, v); break;
1830 case TopAbs_EDGE: meshDS->SetNodeOnEdge( node, myShapeID, u); break;
1831 case TopAbs_VERTEX: meshDS->SetNodeOnVertex( node, myShapeID); break;
1838 //=======================================================================
1839 //function : AddEdge
1840 //purpose : Creates quadratic or linear edge
1841 //=======================================================================
1843 SMDS_MeshEdge* SMESH_MesherHelper::AddEdge(const SMDS_MeshNode* n1,
1844 const SMDS_MeshNode* n2,
1848 SMESHDS_Mesh * meshDS = GetMeshDS();
1850 SMDS_MeshEdge* edge = 0;
1851 if (myCreateQuadratic) {
1852 const SMDS_MeshNode* n12 = GetMediumNode(n1,n2,force3d);
1854 edge = meshDS->AddEdgeWithID(n1, n2, n12, id);
1856 edge = meshDS->AddEdge(n1, n2, n12);
1860 edge = meshDS->AddEdgeWithID(n1, n2, id);
1862 edge = meshDS->AddEdge(n1, n2);
1865 if ( mySetElemOnShape && myShapeID > 0 )
1866 meshDS->SetMeshElementOnShape( edge, myShapeID );
1871 //=======================================================================
1872 //function : AddFace
1873 //purpose : Creates quadratic or linear triangle
1874 //=======================================================================
1876 SMDS_MeshFace* SMESH_MesherHelper::AddFace(const SMDS_MeshNode* n1,
1877 const SMDS_MeshNode* n2,
1878 const SMDS_MeshNode* n3,
1882 SMESHDS_Mesh * meshDS = GetMeshDS();
1883 SMDS_MeshFace* elem = 0;
1885 if( n1==n2 || n2==n3 || n3==n1 )
1888 if(!myCreateQuadratic) {
1890 elem = meshDS->AddFaceWithID(n1, n2, n3, id);
1892 elem = meshDS->AddFace(n1, n2, n3);
1895 const SMDS_MeshNode* n12 = GetMediumNode( n1, n2, force3d, TopAbs_FACE );
1896 const SMDS_MeshNode* n23 = GetMediumNode( n2, n3, force3d, TopAbs_FACE );
1897 const SMDS_MeshNode* n31 = GetMediumNode( n3, n1, force3d, TopAbs_FACE );
1898 if(myCreateBiQuadratic)
1900 const SMDS_MeshNode* nCenter = GetCentralNode(n1, n2, n3, n12, n23, n31, force3d);
1902 elem = meshDS->AddFaceWithID(n1, n2, n3, n12, n23, n31, nCenter, id);
1904 elem = meshDS->AddFace(n1, n2, n3, n12, n23, n31, nCenter);
1909 elem = meshDS->AddFaceWithID(n1, n2, n3, n12, n23, n31, id);
1911 elem = meshDS->AddFace(n1, n2, n3, n12, n23, n31);
1914 if ( mySetElemOnShape && myShapeID > 0 )
1915 meshDS->SetMeshElementOnShape( elem, myShapeID );
1920 //=======================================================================
1921 //function : AddFace
1922 //purpose : Creates bi-quadratic, quadratic or linear quadrangle
1923 //=======================================================================
1925 SMDS_MeshFace* SMESH_MesherHelper::AddFace(const SMDS_MeshNode* n1,
1926 const SMDS_MeshNode* n2,
1927 const SMDS_MeshNode* n3,
1928 const SMDS_MeshNode* n4,
1932 SMESHDS_Mesh * meshDS = GetMeshDS();
1933 SMDS_MeshFace* elem = 0;
1936 return AddFace(n1,n3,n4,id,force3d);
1939 return AddFace(n1,n2,n4,id,force3d);
1942 return AddFace(n1,n2,n3,id,force3d);
1945 return AddFace(n1,n2,n4,id,force3d);
1948 return AddFace(n1,n2,n3,id,force3d);
1951 return AddFace(n1,n2,n3,id,force3d);
1954 if(!myCreateQuadratic) {
1956 elem = meshDS->AddFaceWithID(n1, n2, n3, n4, id);
1958 elem = meshDS->AddFace(n1, n2, n3, n4);
1961 const SMDS_MeshNode* n12 = GetMediumNode( n1, n2, force3d, TopAbs_FACE );
1962 const SMDS_MeshNode* n23 = GetMediumNode( n2, n3, force3d, TopAbs_FACE );
1963 const SMDS_MeshNode* n34 = GetMediumNode( n3, n4, force3d, TopAbs_FACE );
1964 const SMDS_MeshNode* n41 = GetMediumNode( n4, n1, force3d, TopAbs_FACE );
1965 if(myCreateBiQuadratic)
1967 const SMDS_MeshNode* nCenter = GetCentralNode(n1, n2, n3, n4, n12, n23, n34, n41, force3d);
1969 elem = meshDS->AddFaceWithID(n1, n2, n3, n4, n12, n23, n34, n41, nCenter, id);
1971 elem = meshDS->AddFace(n1, n2, n3, n4, n12, n23, n34, n41, nCenter);
1976 elem = meshDS->AddFaceWithID(n1, n2, n3, n4, n12, n23, n34, n41, id);
1978 elem = meshDS->AddFace(n1, n2, n3, n4, n12, n23, n34, n41);
1981 if ( mySetElemOnShape && myShapeID > 0 )
1982 meshDS->SetMeshElementOnShape( elem, myShapeID );
1987 //=======================================================================
1988 //function : AddPolygonalFace
1989 //purpose : Creates polygon, with additional nodes in quadratic mesh
1990 //=======================================================================
1992 SMDS_MeshFace* SMESH_MesherHelper::AddPolygonalFace (const vector<const SMDS_MeshNode*>& nodes,
1996 SMESHDS_Mesh * meshDS = GetMeshDS();
1997 SMDS_MeshFace* elem = 0;
1999 if(!myCreateQuadratic)
2002 elem = meshDS->AddPolygonalFaceWithID(nodes, id);
2004 elem = meshDS->AddPolygonalFace(nodes);
2008 vector<const SMDS_MeshNode*> newNodes( nodes.size() * 2 );
2010 for ( int i = 0; i < nodes.size(); ++i )
2012 const SMDS_MeshNode* n1 = nodes[i];
2013 const SMDS_MeshNode* n2 = nodes[(i+1)%nodes.size()];
2014 const SMDS_MeshNode* n12 = GetMediumNode( n1, n2, force3d, TopAbs_FACE );
2015 newNodes.push_back( n12 );
2018 elem = meshDS->AddQuadPolygonalFaceWithID(newNodes, id);
2020 elem = meshDS->AddQuadPolygonalFace(newNodes);
2022 if ( mySetElemOnShape && myShapeID > 0 )
2023 meshDS->SetMeshElementOnShape( elem, myShapeID );
2028 //=======================================================================
2029 //function : AddVolume
2030 //purpose : Creates quadratic or linear prism
2031 //=======================================================================
2033 SMDS_MeshVolume* SMESH_MesherHelper::AddVolume(const SMDS_MeshNode* n1,
2034 const SMDS_MeshNode* n2,
2035 const SMDS_MeshNode* n3,
2036 const SMDS_MeshNode* n4,
2037 const SMDS_MeshNode* n5,
2038 const SMDS_MeshNode* n6,
2042 SMESHDS_Mesh * meshDS = GetMeshDS();
2043 SMDS_MeshVolume* elem = 0;
2044 if(!myCreateQuadratic) {
2046 elem = meshDS->AddVolumeWithID(n1, n2, n3, n4, n5, n6, id);
2048 elem = meshDS->AddVolume(n1, n2, n3, n4, n5, n6);
2051 const SMDS_MeshNode* n12 = GetMediumNode( n1, n2, force3d, TopAbs_SOLID );
2052 const SMDS_MeshNode* n23 = GetMediumNode( n2, n3, force3d, TopAbs_SOLID );
2053 const SMDS_MeshNode* n31 = GetMediumNode( n3, n1, force3d, TopAbs_SOLID );
2055 const SMDS_MeshNode* n45 = GetMediumNode( n4, n5, force3d, TopAbs_SOLID );
2056 const SMDS_MeshNode* n56 = GetMediumNode( n5, n6, force3d, TopAbs_SOLID );
2057 const SMDS_MeshNode* n64 = GetMediumNode( n6, n4, force3d, TopAbs_SOLID );
2059 const SMDS_MeshNode* n14 = GetMediumNode( n1, n4, force3d, TopAbs_SOLID );
2060 const SMDS_MeshNode* n25 = GetMediumNode( n2, n5, force3d, TopAbs_SOLID );
2061 const SMDS_MeshNode* n36 = GetMediumNode( n3, n6, force3d, TopAbs_SOLID );
2064 elem = meshDS->AddVolumeWithID(n1, n2, n3, n4, n5, n6,
2065 n12, n23, n31, n45, n56, n64, n14, n25, n36, id);
2067 elem = meshDS->AddVolume(n1, n2, n3, n4, n5, n6,
2068 n12, n23, n31, n45, n56, n64, n14, n25, n36);
2070 if ( mySetElemOnShape && myShapeID > 0 )
2071 meshDS->SetMeshElementOnShape( elem, myShapeID );
2076 //=======================================================================
2077 //function : AddVolume
2078 //purpose : Creates quadratic or linear tetrahedron
2079 //=======================================================================
2081 SMDS_MeshVolume* SMESH_MesherHelper::AddVolume(const SMDS_MeshNode* n1,
2082 const SMDS_MeshNode* n2,
2083 const SMDS_MeshNode* n3,
2084 const SMDS_MeshNode* n4,
2088 SMESHDS_Mesh * meshDS = GetMeshDS();
2089 SMDS_MeshVolume* elem = 0;
2090 if(!myCreateQuadratic) {
2092 elem = meshDS->AddVolumeWithID(n1, n2, n3, n4, id);
2094 elem = meshDS->AddVolume(n1, n2, n3, n4);
2097 const SMDS_MeshNode* n12 = GetMediumNode( n1, n2, force3d, TopAbs_SOLID );
2098 const SMDS_MeshNode* n23 = GetMediumNode( n2, n3, force3d, TopAbs_SOLID );
2099 const SMDS_MeshNode* n31 = GetMediumNode( n3, n1, force3d, TopAbs_SOLID );
2101 const SMDS_MeshNode* n14 = GetMediumNode( n1, n4, force3d, TopAbs_SOLID );
2102 const SMDS_MeshNode* n24 = GetMediumNode( n2, n4, force3d, TopAbs_SOLID );
2103 const SMDS_MeshNode* n34 = GetMediumNode( n3, n4, force3d, TopAbs_SOLID );
2106 elem = meshDS->AddVolumeWithID(n1, n2, n3, n4, n12, n23, n31, n14, n24, n34, id);
2108 elem = meshDS->AddVolume(n1, n2, n3, n4, n12, n23, n31, n14, n24, n34);
2110 if ( mySetElemOnShape && myShapeID > 0 )
2111 meshDS->SetMeshElementOnShape( elem, myShapeID );
2116 //=======================================================================
2117 //function : AddVolume
2118 //purpose : Creates quadratic or linear pyramid
2119 //=======================================================================
2121 SMDS_MeshVolume* SMESH_MesherHelper::AddVolume(const SMDS_MeshNode* n1,
2122 const SMDS_MeshNode* n2,
2123 const SMDS_MeshNode* n3,
2124 const SMDS_MeshNode* n4,
2125 const SMDS_MeshNode* n5,
2129 SMDS_MeshVolume* elem = 0;
2130 if(!myCreateQuadratic) {
2132 elem = GetMeshDS()->AddVolumeWithID(n1, n2, n3, n4, n5, id);
2134 elem = GetMeshDS()->AddVolume(n1, n2, n3, n4, n5);
2137 const SMDS_MeshNode* n12 = GetMediumNode( n1, n2, force3d, TopAbs_SOLID );
2138 const SMDS_MeshNode* n23 = GetMediumNode( n2, n3, force3d, TopAbs_SOLID );
2139 const SMDS_MeshNode* n34 = GetMediumNode( n3, n4, force3d, TopAbs_SOLID );
2140 const SMDS_MeshNode* n41 = GetMediumNode( n4, n1, force3d, TopAbs_SOLID );
2142 const SMDS_MeshNode* n15 = GetMediumNode( n1, n5, force3d, TopAbs_SOLID );
2143 const SMDS_MeshNode* n25 = GetMediumNode( n2, n5, force3d, TopAbs_SOLID );
2144 const SMDS_MeshNode* n35 = GetMediumNode( n3, n5, force3d, TopAbs_SOLID );
2145 const SMDS_MeshNode* n45 = GetMediumNode( n4, n5, force3d, TopAbs_SOLID );
2148 elem = GetMeshDS()->AddVolumeWithID ( n1, n2, n3, n4, n5,
2153 elem = GetMeshDS()->AddVolume( n1, n2, n3, n4, n5,
2155 n15, n25, n35, n45);
2157 if ( mySetElemOnShape && myShapeID > 0 )
2158 GetMeshDS()->SetMeshElementOnShape( elem, myShapeID );
2163 //=======================================================================
2164 //function : AddVolume
2165 //purpose : Creates tri-quadratic, quadratic or linear hexahedron
2166 //=======================================================================
2168 SMDS_MeshVolume* SMESH_MesherHelper::AddVolume(const SMDS_MeshNode* n1,
2169 const SMDS_MeshNode* n2,
2170 const SMDS_MeshNode* n3,
2171 const SMDS_MeshNode* n4,
2172 const SMDS_MeshNode* n5,
2173 const SMDS_MeshNode* n6,
2174 const SMDS_MeshNode* n7,
2175 const SMDS_MeshNode* n8,
2179 SMESHDS_Mesh * meshDS = GetMeshDS();
2180 SMDS_MeshVolume* elem = 0;
2181 if(!myCreateQuadratic) {
2183 elem = meshDS->AddVolumeWithID(n1, n2, n3, n4, n5, n6, n7, n8, id);
2185 elem = meshDS->AddVolume(n1, n2, n3, n4, n5, n6, n7, n8);
2188 const SMDS_MeshNode* n12 = GetMediumNode( n1, n2, force3d, TopAbs_SOLID );
2189 const SMDS_MeshNode* n23 = GetMediumNode( n2, n3, force3d, TopAbs_SOLID );
2190 const SMDS_MeshNode* n34 = GetMediumNode( n3, n4, force3d, TopAbs_SOLID );
2191 const SMDS_MeshNode* n41 = GetMediumNode( n4, n1, force3d, TopAbs_SOLID );
2193 const SMDS_MeshNode* n56 = GetMediumNode( n5, n6, force3d, TopAbs_SOLID );
2194 const SMDS_MeshNode* n67 = GetMediumNode( n6, n7, force3d, TopAbs_SOLID );
2195 const SMDS_MeshNode* n78 = GetMediumNode( n7, n8, force3d, TopAbs_SOLID );
2196 const SMDS_MeshNode* n85 = GetMediumNode( n8, n5, force3d, TopAbs_SOLID );
2198 const SMDS_MeshNode* n15 = GetMediumNode( n1, n5, force3d, TopAbs_SOLID );
2199 const SMDS_MeshNode* n26 = GetMediumNode( n2, n6, force3d, TopAbs_SOLID );
2200 const SMDS_MeshNode* n37 = GetMediumNode( n3, n7, force3d, TopAbs_SOLID );
2201 const SMDS_MeshNode* n48 = GetMediumNode( n4, n8, force3d, TopAbs_SOLID );
2202 if ( myCreateBiQuadratic )
2204 const SMDS_MeshNode* n1234 = GetCentralNode( n1,n2,n3,n4,n12,n23,n34,n41,force3d );
2205 const SMDS_MeshNode* n1256 = GetCentralNode( n1,n2,n5,n6,n12,n26,n56,n15,force3d );
2206 const SMDS_MeshNode* n2367 = GetCentralNode( n2,n3,n6,n7,n23,n37,n67,n26,force3d );
2207 const SMDS_MeshNode* n3478 = GetCentralNode( n3,n4,n7,n8,n34,n48,n78,n37,force3d );
2208 const SMDS_MeshNode* n1458 = GetCentralNode( n1,n4,n5,n8,n41,n48,n15,n85,force3d );
2209 const SMDS_MeshNode* n5678 = GetCentralNode( n5,n6,n7,n8,n56,n67,n78,n85,force3d );
2211 vector<gp_XYZ> pointsOnShapes( SMESH_Block::ID_Shell );
2213 pointsOnShapes[ SMESH_Block::ID_V000 ] = SMESH_TNodeXYZ( n4 );
2214 pointsOnShapes[ SMESH_Block::ID_V100 ] = SMESH_TNodeXYZ( n8 );
2215 pointsOnShapes[ SMESH_Block::ID_V010 ] = SMESH_TNodeXYZ( n3 );
2216 pointsOnShapes[ SMESH_Block::ID_V110 ] = SMESH_TNodeXYZ( n7 );
2217 pointsOnShapes[ SMESH_Block::ID_V001 ] = SMESH_TNodeXYZ( n1 );
2218 pointsOnShapes[ SMESH_Block::ID_V101 ] = SMESH_TNodeXYZ( n5 );
2219 pointsOnShapes[ SMESH_Block::ID_V011 ] = SMESH_TNodeXYZ( n2 );
2220 pointsOnShapes[ SMESH_Block::ID_V111 ] = SMESH_TNodeXYZ( n6 );
2222 pointsOnShapes[ SMESH_Block::ID_Ex00 ] = SMESH_TNodeXYZ( n48 );
2223 pointsOnShapes[ SMESH_Block::ID_Ex10 ] = SMESH_TNodeXYZ( n37 );
2224 pointsOnShapes[ SMESH_Block::ID_E0y0 ] = SMESH_TNodeXYZ( n15 );
2225 pointsOnShapes[ SMESH_Block::ID_E1y0 ] = SMESH_TNodeXYZ( n26 );
2226 pointsOnShapes[ SMESH_Block::ID_Ex01 ] = SMESH_TNodeXYZ( n34 );
2227 pointsOnShapes[ SMESH_Block::ID_Ex11 ] = SMESH_TNodeXYZ( n78 );
2228 pointsOnShapes[ SMESH_Block::ID_E0y1 ] = SMESH_TNodeXYZ( n12 );
2229 pointsOnShapes[ SMESH_Block::ID_E1y1 ] = SMESH_TNodeXYZ( n56 );
2230 pointsOnShapes[ SMESH_Block::ID_E00z ] = SMESH_TNodeXYZ( n41 );
2231 pointsOnShapes[ SMESH_Block::ID_E10z ] = SMESH_TNodeXYZ( n85 );
2232 pointsOnShapes[ SMESH_Block::ID_E01z ] = SMESH_TNodeXYZ( n23 );
2233 pointsOnShapes[ SMESH_Block::ID_E11z ] = SMESH_TNodeXYZ( n67 );
2235 pointsOnShapes[ SMESH_Block::ID_Fxy0 ] = SMESH_TNodeXYZ( n3478 );
2236 pointsOnShapes[ SMESH_Block::ID_Fxy1 ] = SMESH_TNodeXYZ( n1256 );
2237 pointsOnShapes[ SMESH_Block::ID_Fx0z ] = SMESH_TNodeXYZ( n1458 );
2238 pointsOnShapes[ SMESH_Block::ID_Fx1z ] = SMESH_TNodeXYZ( n2367 );
2239 pointsOnShapes[ SMESH_Block::ID_F0yz ] = SMESH_TNodeXYZ( n1234 );
2240 pointsOnShapes[ SMESH_Block::ID_F1yz ] = SMESH_TNodeXYZ( n5678 );
2242 gp_XYZ centerCube(0.5, 0.5, 0.5);
2244 SMESH_Block::ShellPoint( centerCube, pointsOnShapes, nCenterElem );
2245 const SMDS_MeshNode* nCenter =
2246 meshDS->AddNode( nCenterElem.X(), nCenterElem.Y(), nCenterElem.Z() );
2247 meshDS->SetNodeInVolume( nCenter, myShapeID );
2250 elem = meshDS->AddVolumeWithID(n1, n2, n3, n4, n5, n6, n7, n8,
2251 n12, n23, n34, n41, n56, n67,
2252 n78, n85, n15, n26, n37, n48,
2253 n1234, n1256, n2367, n3478, n1458, n5678, nCenter, id);
2255 elem = meshDS->AddVolume(n1, n2, n3, n4, n5, n6, n7, n8,
2256 n12, n23, n34, n41, n56, n67,
2257 n78, n85, n15, n26, n37, n48,
2258 n1234, n1256, n2367, n3478, n1458, n5678, nCenter);
2263 elem = meshDS->AddVolumeWithID(n1, n2, n3, n4, n5, n6, n7, n8,
2264 n12, n23, n34, n41, n56, n67,
2265 n78, n85, n15, n26, n37, n48, id);
2267 elem = meshDS->AddVolume(n1, n2, n3, n4, n5, n6, n7, n8,
2268 n12, n23, n34, n41, n56, n67,
2269 n78, n85, n15, n26, n37, n48);
2272 if ( mySetElemOnShape && myShapeID > 0 )
2273 meshDS->SetMeshElementOnShape( elem, myShapeID );
2278 //=======================================================================
2279 //function : AddVolume
2280 //purpose : Creates LINEAR!!!!!!!!! octahedron
2281 //=======================================================================
2283 SMDS_MeshVolume* SMESH_MesherHelper::AddVolume(const SMDS_MeshNode* n1,
2284 const SMDS_MeshNode* n2,
2285 const SMDS_MeshNode* n3,
2286 const SMDS_MeshNode* n4,
2287 const SMDS_MeshNode* n5,
2288 const SMDS_MeshNode* n6,
2289 const SMDS_MeshNode* n7,
2290 const SMDS_MeshNode* n8,
2291 const SMDS_MeshNode* n9,
2292 const SMDS_MeshNode* n10,
2293 const SMDS_MeshNode* n11,
2294 const SMDS_MeshNode* n12,
2298 SMESHDS_Mesh * meshDS = GetMeshDS();
2299 SMDS_MeshVolume* elem = 0;
2301 elem = meshDS->AddVolumeWithID(n1,n2,n3,n4,n5,n6,n7,n8,n9,n10,n11,n12,id);
2303 elem = meshDS->AddVolume(n1,n2,n3,n4,n5,n6,n7,n8,n9,n10,n11,n12);
2304 if ( mySetElemOnShape && myShapeID > 0 )
2305 meshDS->SetMeshElementOnShape( elem, myShapeID );
2309 //=======================================================================
2310 //function : AddPolyhedralVolume
2311 //purpose : Creates polyhedron. In quadratic mesh, adds medium nodes
2312 //=======================================================================
2315 SMESH_MesherHelper::AddPolyhedralVolume (const std::vector<const SMDS_MeshNode*>& nodes,
2316 const std::vector<int>& quantities,
2320 SMESHDS_Mesh * meshDS = GetMeshDS();
2321 SMDS_MeshVolume* elem = 0;
2322 if(!myCreateQuadratic)
2325 elem = meshDS->AddPolyhedralVolumeWithID(nodes, quantities, id);
2327 elem = meshDS->AddPolyhedralVolume(nodes, quantities);
2331 vector<const SMDS_MeshNode*> newNodes;
2332 vector<int> newQuantities;
2333 for ( int iFace=0, iN=0; iFace < quantities.size(); ++iFace)
2335 int nbNodesInFace = quantities[iFace];
2336 newQuantities.push_back(0);
2337 for ( int i = 0; i < nbNodesInFace; ++i )
2339 const SMDS_MeshNode* n1 = nodes[ iN + i ];
2340 newNodes.push_back( n1 );
2341 newQuantities.back()++;
2343 const SMDS_MeshNode* n2 = nodes[ iN + ( i+1==nbNodesInFace ? 0 : i+1 )];
2344 // if ( n1->GetPosition()->GetTypeOfPosition() != SMDS_TOP_3DSPACE &&
2345 // n2->GetPosition()->GetTypeOfPosition() != SMDS_TOP_3DSPACE )
2347 const SMDS_MeshNode* n12 = GetMediumNode( n1, n2, force3d, TopAbs_SOLID );
2348 newNodes.push_back( n12 );
2349 newQuantities.back()++;
2352 iN += nbNodesInFace;
2355 elem = meshDS->AddPolyhedralVolumeWithID( newNodes, newQuantities, id );
2357 elem = meshDS->AddPolyhedralVolume( newNodes, newQuantities );
2359 if ( mySetElemOnShape && myShapeID > 0 )
2360 meshDS->SetMeshElementOnShape( elem, myShapeID );
2367 //================================================================================
2369 * \brief Check if a node belongs to any face of sub-mesh
2371 //================================================================================
2373 bool isNodeInSubMesh( const SMDS_MeshNode* n, const SMESHDS_SubMesh* sm )
2375 SMDS_ElemIteratorPtr fIt = n->GetInverseElementIterator( SMDSAbs_Face );
2376 while ( fIt->more() )
2377 if ( sm->Contains( fIt->next() ))
2383 //=======================================================================
2384 //function : IsSameElemGeometry
2385 //purpose : Returns true if all elements of a sub-mesh are of same shape
2386 //=======================================================================
2388 bool SMESH_MesherHelper::IsSameElemGeometry(const SMESHDS_SubMesh* smDS,
2389 SMDSAbs_GeometryType shape,
2390 const bool nullSubMeshRes)
2392 if ( !smDS ) return nullSubMeshRes;
2394 SMDS_ElemIteratorPtr elemIt = smDS->GetElements();
2395 while ( elemIt->more() ) {
2396 const SMDS_MeshElement* e = elemIt->next();
2397 if ( e->GetGeomType() != shape )
2403 //=======================================================================
2404 //function : LoadNodeColumns
2405 //purpose : Load nodes bound to face into a map of node columns
2406 //=======================================================================
2408 bool SMESH_MesherHelper::LoadNodeColumns(TParam2ColumnMap & theParam2ColumnMap,
2409 const TopoDS_Face& theFace,
2410 const TopoDS_Edge& theBaseEdge,
2411 SMESHDS_Mesh* theMesh,
2412 SMESH_ProxyMesh* theProxyMesh)
2414 return LoadNodeColumns(theParam2ColumnMap,
2416 std::list<TopoDS_Edge>(1,theBaseEdge),
2421 //=======================================================================
2422 //function : LoadNodeColumns
2423 //purpose : Load nodes bound to face into a map of node columns
2424 //=======================================================================
2426 bool SMESH_MesherHelper::LoadNodeColumns(TParam2ColumnMap & theParam2ColumnMap,
2427 const TopoDS_Face& theFace,
2428 const std::list<TopoDS_Edge>& theBaseSide,
2429 SMESHDS_Mesh* theMesh,
2430 SMESH_ProxyMesh* theProxyMesh)
2432 // get a right sub-mesh of theFace
2434 const SMESHDS_SubMesh* faceSubMesh = 0;
2437 faceSubMesh = theProxyMesh->GetSubMesh( theFace );
2438 if ( !faceSubMesh ||
2439 faceSubMesh->NbElements() == 0 ||
2440 theProxyMesh->IsTemporary( faceSubMesh->GetElements()->next() ))
2442 // can use a proxy sub-mesh with not temporary elements only
2448 faceSubMesh = theMesh->MeshElements( theFace );
2449 if ( !faceSubMesh || faceSubMesh->NbElements() == 0 )
2452 if ( theParam2ColumnMap.empty() )
2454 // get data of edges for normalization of params
2455 vector< double > length;
2457 list<TopoDS_Edge>::const_iterator edge;
2459 for ( edge = theBaseSide.begin(); edge != theBaseSide.end(); ++edge )
2461 double len = std::max( 1e-10, SMESH_Algo::EdgeLength( *edge ));
2463 length.push_back( len );
2467 // get nodes on theBaseEdge sorted by param on edge and initialize theParam2ColumnMap with them
2468 edge = theBaseSide.begin();
2469 for ( int iE = 0; edge != theBaseSide.end(); ++edge, ++iE )
2471 map< double, const SMDS_MeshNode*> sortedBaseNN;
2472 SMESH_Algo::GetSortedNodesOnEdge( theMesh, *edge,/*noMedium=*/true, sortedBaseNN );
2474 map< double, const SMDS_MeshNode*>::iterator u_n;
2475 // pb with mesh_Projection_2D_00/A1 fixed by adding expectedSupport arg to GetMediumPos()
2476 // so the following solution is commented (hope forever :)
2478 // SMESH_Algo::GetSortedNodesOnEdge( theMesh, *edge,/*noMedium=*/true, sortedBaseNN,
2479 // // SMDSAbs_Edge here is needed to be coherent with
2480 // // StdMeshers_FaceSide used by Quadrangle to get nodes
2481 // // on EDGE; else pb in mesh_Projection_2D_00/A1 where a
2482 // // medium node on EDGE is medium in a triangle but not
2485 // if ( faceSubMesh->GetElements()->next()->IsQuadratic() )
2486 // // filter off nodes medium in faces on theFace (same pb with mesh_Projection_2D_00/A1)
2487 // for ( u_n = sortedBaseNN.begin(); u_n != sortedBaseNN.end() ; )
2489 // const SMDS_MeshNode* node = u_n->second;
2490 // SMDS_ElemIteratorPtr faceIt = node->GetInverseElementIterator( SMDSAbs_Face );
2491 // if ( faceIt->more() && node ) {
2492 // const SMDS_MeshElement* face = faceIt->next();
2493 // if ( faceSubMesh->Contains( face ) && face->IsMediumNode( node ))
2497 // sortedBaseNN.erase( u_n++ );
2501 if ( sortedBaseNN.empty() ) continue;
2503 u_n = sortedBaseNN.begin();
2504 if ( theProxyMesh ) // from sortedBaseNN remove nodes not shared by faces of faceSubMesh
2506 const SMDS_MeshNode* n1 = (++sortedBaseNN.begin())->second;
2507 const SMDS_MeshNode* n2 = (++sortedBaseNN.rbegin())->second;
2508 bool allNodesAreProxy = ( n1 != theProxyMesh->GetProxyNode( n1 ) &&
2509 n2 != theProxyMesh->GetProxyNode( n2 ));
2510 if ( allNodesAreProxy )
2511 for ( u_n = sortedBaseNN.begin(); u_n != sortedBaseNN.end(); u_n++ )
2512 u_n->second = theProxyMesh->GetProxyNode( u_n->second );
2514 if ( u_n = sortedBaseNN.begin(), !isNodeInSubMesh( u_n->second, faceSubMesh ))
2516 while ( ++u_n != sortedBaseNN.end() && !isNodeInSubMesh( u_n->second, faceSubMesh ));
2517 sortedBaseNN.erase( sortedBaseNN.begin(), u_n );
2519 if ( !sortedBaseNN.empty() )
2520 if ( u_n = --sortedBaseNN.end(), !isNodeInSubMesh( u_n->second, faceSubMesh ))
2522 while ( u_n != sortedBaseNN.begin() && !isNodeInSubMesh( (--u_n)->second, faceSubMesh ));
2523 sortedBaseNN.erase( ++u_n, sortedBaseNN.end() );
2525 if ( sortedBaseNN.empty() ) continue;
2529 BRep_Tool::Range( *edge, f, l );
2530 if ( edge->Orientation() == TopAbs_REVERSED ) std::swap( f, l );
2531 const double coeff = 1. / ( l - f ) * length[iE] / fullLen;
2532 const double prevPar = theParam2ColumnMap.empty() ? 0 : theParam2ColumnMap.rbegin()->first;
2533 for ( u_n = sortedBaseNN.begin(); u_n != sortedBaseNN.end(); u_n++ )
2535 double par = prevPar + coeff * ( u_n->first - f );
2536 TParam2ColumnMap::iterator u2nn =
2537 theParam2ColumnMap.insert( theParam2ColumnMap.end(), make_pair( par, TNodeColumn()));
2538 u2nn->second.push_back( u_n->second );
2541 if ( theParam2ColumnMap.size() < 2 )
2546 int prevNbRows = theParam2ColumnMap.begin()->second.size(); // current, at least 1 here
2547 int expectedNbRows = faceSubMesh->NbElements() / ( theParam2ColumnMap.size()-1 ); // to be added
2549 // fill theParam2ColumnMap column by column by passing from nodes on
2550 // theBaseEdge up via mesh faces on theFace
2552 TParam2ColumnMap::iterator par_nVec_1, par_nVec_2;
2553 par_nVec_2 = theParam2ColumnMap.begin();
2554 par_nVec_1 = par_nVec_2++;
2555 TIDSortedElemSet emptySet, avoidSet;
2556 for ( ; par_nVec_2 != theParam2ColumnMap.end(); ++par_nVec_1, ++par_nVec_2 )
2558 vector<const SMDS_MeshNode*>& nCol1 = par_nVec_1->second;
2559 vector<const SMDS_MeshNode*>& nCol2 = par_nVec_2->second;
2560 nCol1.resize( prevNbRows + expectedNbRows );
2561 nCol2.resize( prevNbRows + expectedNbRows );
2563 int i1, i2, foundNbRows = 0;
2564 const SMDS_MeshNode *n1 = nCol1[ prevNbRows-1 ];
2565 const SMDS_MeshNode *n2 = nCol2[ prevNbRows-1 ];
2566 // find face sharing node n1 and n2 and belonging to faceSubMesh
2567 while ( const SMDS_MeshElement* face =
2568 SMESH_MeshAlgos::FindFaceInSet( n1, n2, emptySet, avoidSet, &i1, &i2))
2570 if ( faceSubMesh->Contains( face ))
2572 int nbNodes = face->NbCornerNodes();
2575 if ( foundNbRows + 1 > expectedNbRows )
2577 n1 = face->GetNode( (i2+2) % 4 ); // opposite corner of quadrangle face
2578 n2 = face->GetNode( (i1+2) % 4 );
2579 nCol1[ prevNbRows + foundNbRows] = n1;
2580 nCol2[ prevNbRows + foundNbRows] = n2;
2583 avoidSet.insert( face );
2585 if ( foundNbRows != expectedNbRows )
2589 return ( theParam2ColumnMap.size() > 1 &&
2590 theParam2ColumnMap.begin()->second.size() == prevNbRows + expectedNbRows );
2595 //================================================================================
2597 * \brief Return true if a node is at a corner of a 2D structured mesh of FACE
2599 //================================================================================
2601 bool isCornerOfStructure( const SMDS_MeshNode* n,
2602 const SMESHDS_SubMesh* faceSM,
2603 SMESH_MesherHelper& faceAnalyser )
2605 int nbFacesInSM = 0;
2607 SMDS_ElemIteratorPtr fIt = n->GetInverseElementIterator( SMDSAbs_Face );
2608 while ( fIt->more() )
2609 nbFacesInSM += faceSM->Contains( fIt->next() );
2611 if ( nbFacesInSM == 1 )
2614 if ( nbFacesInSM == 2 && n->GetPosition()->GetTypeOfPosition() == SMDS_TOP_VERTEX )
2616 return faceAnalyser.IsRealSeam( n->getshapeId() );
2622 //=======================================================================
2623 //function : IsStructured
2624 //purpose : Return true if 2D mesh on FACE is a structured rectangle
2625 //=======================================================================
2627 bool SMESH_MesherHelper::IsStructured( SMESH_subMesh* faceSM )
2629 SMESHDS_SubMesh* fSM = faceSM->GetSubMeshDS();
2630 if ( !fSM || fSM->NbElements() == 0 )
2633 list< TopoDS_Edge > edges;
2634 list< int > nbEdgesInWires;
2635 int nbWires = SMESH_Block::GetOrderedEdges( TopoDS::Face( faceSM->GetSubShape() ),
2636 edges, nbEdgesInWires );
2637 if ( nbWires != 1 /*|| nbEdgesInWires.front() != 4*/ ) // allow composite sides
2640 // algo: find corners of a structure and then analyze nb of faces and
2641 // length of structure sides
2643 SMESHDS_Mesh* meshDS = faceSM->GetFather()->GetMeshDS();
2644 SMESH_MesherHelper faceAnalyser( *faceSM->GetFather() );
2645 faceAnalyser.SetSubShape( faceSM->GetSubShape() );
2647 // rotate edges to get the first node being at corner
2648 // (in principle it's not necessary because so far none SALOME algo can make
2649 // such a structured mesh that all corner nodes are not on VERTEXes)
2650 bool isCorner = false;
2651 int nbRemainEdges = nbEdgesInWires.front();
2653 TopoDS_Vertex V = IthVertex( 0, edges.front() );
2654 isCorner = isCornerOfStructure( SMESH_Algo::VertexNode( V, meshDS ),
2657 edges.splice( edges.end(), edges, edges.begin() );
2661 while ( !isCorner && nbRemainEdges > 0 );
2666 // get all nodes from EDGEs
2667 list< const SMDS_MeshNode* > nodes;
2668 list< TopoDS_Edge >::iterator edge = edges.begin();
2669 for ( ; edge != edges.end(); ++edge )
2671 map< double, const SMDS_MeshNode* > u2Nodes;
2672 if ( !SMESH_Algo::GetSortedNodesOnEdge( meshDS, *edge,
2673 /*skipMedium=*/true, u2Nodes ))
2676 list< const SMDS_MeshNode* > edgeNodes;
2677 map< double, const SMDS_MeshNode* >::iterator u2n = u2Nodes.begin();
2678 for ( ; u2n != u2Nodes.end(); ++u2n )
2679 edgeNodes.push_back( u2n->second );
2680 if ( edge->Orientation() == TopAbs_REVERSED )
2681 edgeNodes.reverse();
2683 if ( !nodes.empty() && nodes.back() == edgeNodes.front() )
2684 edgeNodes.pop_front();
2685 nodes.splice( nodes.end(), edgeNodes, edgeNodes.begin(), edgeNodes.end() );
2688 // get length of structured sides
2689 vector<int> nbEdgesInSide;
2691 list< const SMDS_MeshNode* >::iterator n = ++nodes.begin();
2692 for ( ; n != nodes.end(); ++n )
2695 if ( isCornerOfStructure( *n, fSM, faceAnalyser )) {
2696 nbEdgesInSide.push_back( nbEdges );
2702 if ( nbEdgesInSide.size() != 4 )
2704 if ( nbEdgesInSide[0] != nbEdgesInSide[2] )
2706 if ( nbEdgesInSide[1] != nbEdgesInSide[3] )
2708 if ( nbEdgesInSide[0] * nbEdgesInSide[1] != fSM->NbElements() )
2714 //=======================================================================
2715 //function : IsDistorted2D
2716 //purpose : Return true if 2D mesh on FACE is ditorted
2717 //=======================================================================
2719 bool SMESH_MesherHelper::IsDistorted2D( SMESH_subMesh* faceSM,
2722 if ( !faceSM || faceSM->GetSubShape().ShapeType() != TopAbs_FACE )
2725 bool haveBadFaces = false;
2727 SMESH_MesherHelper helper( *faceSM->GetFather() );
2728 helper.SetSubShape( faceSM->GetSubShape() );
2730 const TopoDS_Face& F = TopoDS::Face( faceSM->GetSubShape() );
2731 SMESHDS_SubMesh* smDS = helper.GetMeshDS()->MeshElements( F );
2732 if ( !smDS || smDS->NbElements() == 0 ) return false;
2734 SMDS_ElemIteratorPtr faceIt = smDS->GetElements();
2735 double prevArea = 0;
2736 vector< const SMDS_MeshNode* > nodes;
2738 bool* toCheckUV = checkUV ? & checkUV : 0;
2739 while ( faceIt->more() && !haveBadFaces )
2741 const SMDS_MeshElement* face = faceIt->next();
2744 nodes.resize( face->NbCornerNodes() );
2745 SMDS_MeshElement::iterator n = face->begin_nodes();
2746 for ( size_t i = 0; i < nodes.size(); ++n, ++i )
2749 // avoid elems on degenarate shapes as UV on them can be wrong
2750 if ( helper.HasDegeneratedEdges() )
2752 bool isOnDegen = false;
2753 for ( size_t i = 0; ( i < nodes.size() && !isOnDegen ); ++i )
2754 isOnDegen = helper.IsDegenShape( nodes[ i ]->getshapeId() );
2758 // prepare to getting UVs
2759 const SMDS_MeshNode* inFaceNode = 0;
2760 if ( helper.HasSeam() ) {
2761 for ( size_t i = 0; ( i < nodes.size() && !inFaceNode ); ++i )
2762 if ( !helper.IsSeamShape( nodes[ i ]->getshapeId() ))
2763 inFaceNode = nodes[ i ];
2768 uv.resize( nodes.size() );
2769 for ( size_t i = 0; i < nodes.size(); ++i )
2770 uv[ i ] = helper.GetNodeUV( F, nodes[ i ], inFaceNode, toCheckUV );
2772 // compare orientation of triangles
2773 double faceArea = 0;
2774 for ( int iT = 0, nbT = nodes.size()-2; iT < nbT; ++iT )
2776 gp_XY v1 = uv[ iT+1 ] - uv[ 0 ];
2777 gp_XY v2 = uv[ iT+2 ] - uv[ 0 ];
2778 faceArea += v2 ^ v1;
2780 haveBadFaces = ( faceArea * prevArea < 0 );
2781 prevArea = faceArea;
2784 return haveBadFaces;
2787 //================================================================================
2789 * \brief Find out elements orientation on a geometrical face
2790 * \param theFace - The face correctly oriented in the shape being meshed
2791 * \retval bool - true if the face normal and the normal of first element
2792 * in the correspoding submesh point in different directions
2794 //================================================================================
2796 bool SMESH_MesherHelper::IsReversedSubMesh (const TopoDS_Face& theFace)
2798 if ( theFace.IsNull() )
2801 // find out orientation of a meshed face
2802 int faceID = GetMeshDS()->ShapeToIndex( theFace );
2803 TopoDS_Shape aMeshedFace = GetMeshDS()->IndexToShape( faceID );
2804 bool isReversed = ( theFace.Orientation() != aMeshedFace.Orientation() );
2806 const SMESHDS_SubMesh * aSubMeshDSFace = GetMeshDS()->MeshElements( faceID );
2807 if ( !aSubMeshDSFace )
2810 // find an element on a bounday of theFace
2811 SMDS_ElemIteratorPtr iteratorElem = aSubMeshDSFace->GetElements();
2812 const SMDS_MeshNode* nn[2];
2813 while ( iteratorElem->more() ) // loop on elements on theFace
2815 const SMDS_MeshElement* elem = iteratorElem->next();
2816 if ( ! elem ) continue;
2818 // look for 2 nodes on EDGE
2819 int nbNodes = elem->NbCornerNodes();
2820 nn[0] = elem->GetNode( nbNodes-1 );
2821 for ( int iN = 0; iN < nbNodes; ++iN )
2823 nn[1] = elem->GetNode( iN );
2824 if ( nn[0]->GetPosition()->GetDim() < 2 &&
2825 nn[1]->GetPosition()->GetDim() < 2 )
2827 TopoDS_Shape s0 = GetSubShapeByNode( nn[0], GetMeshDS() );
2828 TopoDS_Shape s1 = GetSubShapeByNode( nn[1], GetMeshDS() );
2829 TopoDS_Shape E = GetCommonAncestor( s0, s1, *myMesh, TopAbs_EDGE );
2830 if ( !E.IsNull() && !s0.IsSame( s1 ))
2834 for ( TopExp_Explorer exp( theFace, TopAbs_EDGE ); exp.More(); exp.Next() )
2835 if ( E.IsSame( exp.Current() )) {
2837 E = exp.Current(); // to know orientation
2842 double u0 = GetNodeU( TopoDS::Edge( E ), nn[0], nn[1], &ok );
2843 double u1 = GetNodeU( TopoDS::Edge( E ), nn[1], nn[0], &ok );
2846 isReversed = ( u0 > u1 );
2847 if ( E.Orientation() == TopAbs_REVERSED )
2848 isReversed = !isReversed;
2858 // find an element with a good normal
2860 bool normalOK = false;
2862 iteratorElem = aSubMeshDSFace->GetElements();
2863 while ( !normalOK && iteratorElem->more() ) // loop on elements on theFace
2865 const SMDS_MeshElement* elem = iteratorElem->next();
2866 if ( ! SMESH_MeshAlgos::FaceNormal( elem, const_cast<gp_XYZ&>( Ne.XYZ() ), /*normalized=*/0 ))
2870 // get UV of a node inside theFACE
2871 SMDS_ElemIteratorPtr nodesIt = elem->nodesIterator();
2872 const SMDS_MeshNode* nInFace = 0;
2873 int iPosDim = SMDS_TOP_VERTEX;
2874 while ( nodesIt->more() ) // loop on nodes
2876 const SMDS_MeshNode* n = static_cast<const SMDS_MeshNode*>( nodesIt->next() );
2877 if ( n->GetPosition()->GetTypeOfPosition() >= iPosDim )
2880 iPosDim = n->GetPosition()->GetTypeOfPosition();
2883 uv = GetNodeUV( theFace, nInFace, 0, &normalOK );
2888 // face normal at node position
2889 TopLoc_Location loc;
2890 Handle(Geom_Surface) surf = BRep_Tool::Surface( theFace, loc );
2891 // if ( surf.IsNull() || surf->Continuity() < GeomAbs_C1 )
2892 // some surfaces not detected as GeomAbs_C1 are nevertheless correct for meshing
2893 if ( surf.IsNull() || surf->Continuity() < GeomAbs_C0 )
2896 gp_Vec d1u, d1v; gp_Pnt p;
2897 surf->D1( uv.X(), uv.Y(), p, d1u, d1v );
2898 gp_Vec Nf = (d1u ^ d1v).Transformed( loc );
2900 if ( theFace.Orientation() == TopAbs_REVERSED )
2903 return Ne * Nf < 0.;
2906 //=======================================================================
2908 //purpose : Count nb of sub-shapes
2909 //=======================================================================
2911 int SMESH_MesherHelper::Count(const TopoDS_Shape& shape,
2912 const TopAbs_ShapeEnum type,
2913 const bool ignoreSame)
2916 TopTools_IndexedMapOfShape map;
2917 TopExp::MapShapes( shape, type, map );
2918 return map.Extent();
2922 for ( TopExp_Explorer exp( shape, type ); exp.More(); exp.Next() )
2928 //=======================================================================
2929 //function : NbAncestors
2930 //purpose : Return number of unique ancestors of the shape
2931 //=======================================================================
2933 int SMESH_MesherHelper::NbAncestors(const TopoDS_Shape& shape,
2934 const SMESH_Mesh& mesh,
2935 TopAbs_ShapeEnum ancestorType/*=TopAbs_SHAPE*/)
2937 TopTools_MapOfShape ancestors;
2938 TopTools_ListIteratorOfListOfShape ansIt( mesh.GetAncestors(shape) );
2939 for ( ; ansIt.More(); ansIt.Next() ) {
2940 if ( ancestorType == TopAbs_SHAPE || ansIt.Value().ShapeType() == ancestorType )
2941 ancestors.Add( ansIt.Value() );
2943 return ancestors.Extent();
2946 //=======================================================================
2947 //function : GetSubShapeOri
2948 //purpose : Return orientation of sub-shape in the main shape
2949 //=======================================================================
2951 TopAbs_Orientation SMESH_MesherHelper::GetSubShapeOri(const TopoDS_Shape& shape,
2952 const TopoDS_Shape& subShape)
2954 TopAbs_Orientation ori = TopAbs_Orientation(-1);
2955 if ( !shape.IsNull() && !subShape.IsNull() )
2957 TopExp_Explorer e( shape, subShape.ShapeType() );
2958 if ( shape.Orientation() >= TopAbs_INTERNAL ) // TopAbs_INTERNAL or TopAbs_EXTERNAL
2959 e.Init( shape.Oriented(TopAbs_FORWARD), subShape.ShapeType() );
2960 for ( ; e.More(); e.Next())
2961 if ( subShape.IsSame( e.Current() ))
2964 ori = e.Current().Orientation();
2969 //=======================================================================
2970 //function : IsSubShape
2972 //=======================================================================
2974 bool SMESH_MesherHelper::IsSubShape( const TopoDS_Shape& shape,
2975 const TopoDS_Shape& mainShape )
2977 if ( !shape.IsNull() && !mainShape.IsNull() )
2979 for ( TopExp_Explorer exp( mainShape, shape.ShapeType());
2982 if ( shape.IsSame( exp.Current() ))
2985 SCRUTE((shape.IsNull()));
2986 SCRUTE((mainShape.IsNull()));
2990 //=======================================================================
2991 //function : IsSubShape
2993 //=======================================================================
2995 bool SMESH_MesherHelper::IsSubShape( const TopoDS_Shape& shape, SMESH_Mesh* aMesh )
2997 if ( shape.IsNull() || !aMesh )
3000 aMesh->GetMeshDS()->ShapeToIndex( shape ) ||
3002 (shape.ShapeType() == TopAbs_COMPOUND && aMesh->GetMeshDS()->IsGroupOfSubShapes( shape ));