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() ) -- 0023068
195 if ( myTLinkNodeMap.empty() )
196 myCreateQuadratic = false;
198 if ( !myCreateQuadratic )
199 myTLinkNodeMap.clear();
203 return myCreateQuadratic;
206 //=======================================================================
207 //function : SetSubShape
208 //purpose : Set geometry to make elements on
209 //=======================================================================
211 void SMESH_MesherHelper::SetSubShape(const int aShID)
213 if ( aShID == myShapeID )
216 SetSubShape( GetMeshDS()->IndexToShape( aShID ));
218 SetSubShape( TopoDS_Shape() );
221 //=======================================================================
222 //function : SetSubShape
223 //purpose : Set geometry to create elements on
224 //=======================================================================
226 void SMESH_MesherHelper::SetSubShape(const TopoDS_Shape& aSh)
228 if ( myShape.IsSame( aSh ))
232 mySeamShapeIds.clear();
233 myDegenShapeIds.clear();
235 if ( myShape.IsNull() ) {
239 SMESHDS_Mesh* meshDS = GetMeshDS();
240 myShapeID = meshDS->ShapeToIndex(aSh);
243 // treatment of periodic faces
244 for ( TopExp_Explorer eF( aSh, TopAbs_FACE ); eF.More(); eF.Next() )
246 const TopoDS_Face& face = TopoDS::Face( eF.Current() );
247 BRepAdaptor_Surface surf( face, false );
248 if ( surf.IsUPeriodic() || surf.IsUClosed() ) {
249 myParIndex |= U_periodic;
250 myPar1[0] = surf.FirstUParameter();
251 myPar2[0] = surf.LastUParameter();
253 if ( surf.IsVPeriodic() || surf.IsVClosed() ) {
254 myParIndex |= V_periodic;
255 myPar1[1] = surf.FirstVParameter();
256 myPar2[1] = surf.LastVParameter();
260 for (TopExp_Explorer exp( face, TopAbs_EDGE ); exp.More(); exp.Next())
262 // look for a "seam" edge, a real seam or an edge on period boundary
263 TopoDS_Edge edge = TopoDS::Edge( exp.Current() );
264 const int edgeID = meshDS->ShapeToIndex( edge );
267 BRep_Tool::UVPoints( edge, face, uv1, uv2 );
268 const double du = Abs( uv1.Coord(1) - uv2.Coord(1) );
269 const double dv = Abs( uv1.Coord(2) - uv2.Coord(2) );
271 bool isSeam = BRep_Tool::IsClosed( edge, face );
272 if ( isSeam ) // real seam - having two pcurves on face
274 // pcurve can lie not on pediod boundary (22582, mesh_Quadratic_01/C9)
277 double u1 = uv1.Coord(1);
279 BRep_Tool::UVPoints( edge, face, uv1, uv2 );
280 double u2 = uv1.Coord(1);
281 myPar1[0] = Min( u1, u2 );
282 myPar2[0] = Max( u1, u2 );
286 double v1 = uv1.Coord(2);
288 BRep_Tool::UVPoints( edge, face, uv1, uv2 );
289 double v2 = uv1.Coord(2);
290 myPar1[1] = Min( v1, v2 );
291 myPar2[1] = Max( v1, v2 );
294 else //if ( !isSeam )
296 // one pcurve but on period boundary (22772, mesh_Quadratic_01/D1)
297 if (( myParIndex & U_periodic ) && du < Precision::PConfusion() )
299 isSeam = ( Abs( uv1.Coord(1) - myPar1[0] ) < Precision::PConfusion() ||
300 Abs( uv1.Coord(1) - myPar2[0] ) < Precision::PConfusion() );
302 else if (( myParIndex & V_periodic ) && dv < Precision::PConfusion() )
304 isSeam = ( Abs( uv1.Coord(2) - myPar1[1] ) < Precision::PConfusion() ||
305 Abs( uv1.Coord(2) - myPar2[1] ) < Precision::PConfusion() );
307 if ( isSeam ) // vertices are on period boundary, check a middle point (23032)
309 double f,l, r = 0.2345;
310 Handle(Geom2d_Curve) C2d = BRep_Tool::CurveOnSurface( edge, face, f, l );
311 uv2 = C2d->Value( f * r + l * ( 1.-r ));
312 if ( du < Precision::PConfusion() )
313 isSeam = ( Abs( uv1.Coord(1) - uv2.Coord(1) ) < Precision::PConfusion() );
315 isSeam = ( Abs( uv1.Coord(2) - uv2.Coord(2) ) < Precision::PConfusion() );
320 // store seam shape indices, negative if shape encounters twice ('real seam')
321 mySeamShapeIds.insert( IsSeamShape( edgeID ) ? -edgeID : edgeID );
322 for ( TopExp_Explorer v( edge, TopAbs_VERTEX ); v.More(); v.Next() ) {
323 int vertexID = meshDS->ShapeToIndex( v.Current() );
324 mySeamShapeIds.insert( IsSeamShape( vertexID ) ? -vertexID : vertexID );
328 // look for a degenerated edge
329 if ( SMESH_Algo::isDegenerated( edge )) {
330 myDegenShapeIds.insert( edgeID );
331 for ( TopExp_Explorer v( edge, TopAbs_VERTEX ); v.More(); v.Next() )
332 myDegenShapeIds.insert( meshDS->ShapeToIndex( v.Current() ));
334 if ( !BRep_Tool::SameParameter( edge ) ||
335 !BRep_Tool::SameRange( edge ))
337 setPosOnShapeValidity( edgeID, false );
343 //=======================================================================
344 //function : GetNodeUVneedInFaceNode
345 //purpose : Check if inFaceNode argument is necessary for call GetNodeUV(F,..)
346 // Return true if the face is periodic.
347 // If F is Null, answer about sub-shape set through IsQuadraticSubMesh() or
349 //=======================================================================
351 bool SMESH_MesherHelper::GetNodeUVneedInFaceNode(const TopoDS_Face& F) const
353 if ( F.IsNull() ) return !mySeamShapeIds.empty();
355 if ( !F.IsNull() && !myShape.IsNull() && myShape.IsSame( F ))
356 return !mySeamShapeIds.empty();
359 Handle(Geom_Surface) aSurface = BRep_Tool::Surface( F,loc );
360 if ( !aSurface.IsNull() )
361 return ( aSurface->IsUPeriodic() || aSurface->IsVPeriodic() );
366 //=======================================================================
367 //function : IsMedium
369 //=======================================================================
371 bool SMESH_MesherHelper::IsMedium(const SMDS_MeshNode* node,
372 const SMDSAbs_ElementType typeToCheck)
374 return SMESH_MeshEditor::IsMedium( node, typeToCheck );
377 //=======================================================================
378 //function : GetSubShapeByNode
379 //purpose : Return support shape of a node
380 //=======================================================================
382 TopoDS_Shape SMESH_MesherHelper::GetSubShapeByNode(const SMDS_MeshNode* node,
383 const SMESHDS_Mesh* meshDS)
385 int shapeID = node ? node->getshapeId() : 0;
386 if ( 0 < shapeID && shapeID <= meshDS->MaxShapeIndex() )
387 return meshDS->IndexToShape( shapeID );
389 return TopoDS_Shape();
393 //=======================================================================
394 //function : AddTLinkNode
395 //purpose : add a link in my data structure
396 //=======================================================================
398 void SMESH_MesherHelper::AddTLinkNode(const SMDS_MeshNode* n1,
399 const SMDS_MeshNode* n2,
400 const SMDS_MeshNode* n12)
402 // add new record to map
403 SMESH_TLink link( n1, n2 );
404 myTLinkNodeMap.insert( make_pair(link,n12));
407 //================================================================================
409 * \brief Add quadratic links of edge to own data structure
411 //================================================================================
413 bool SMESH_MesherHelper::AddTLinks(const SMDS_MeshEdge* edge)
415 if ( edge && edge->IsQuadratic() )
416 AddTLinkNode(edge->GetNode(0), edge->GetNode(1), edge->GetNode(2));
422 //================================================================================
424 * \brief Add quadratic links of face to own data structure
426 //================================================================================
428 bool SMESH_MesherHelper::AddTLinks(const SMDS_MeshFace* f)
432 switch ( f->NbNodes() ) {
434 // myMapWithCentralNode.insert
435 // ( make_pair( TBiQuad( f->GetNode(0),f->GetNode(1),f->GetNode(2) ),
437 // break; -- add medium nodes as well
439 AddTLinkNode(f->GetNode(0),f->GetNode(1),f->GetNode(3));
440 AddTLinkNode(f->GetNode(1),f->GetNode(2),f->GetNode(4));
441 AddTLinkNode(f->GetNode(2),f->GetNode(0),f->GetNode(5)); break;
444 // myMapWithCentralNode.insert
445 // ( make_pair( TBiQuad( f->GetNode(0),f->GetNode(1),f->GetNode(2),f->GetNode(3) ),
447 // break; -- add medium nodes as well
449 AddTLinkNode(f->GetNode(0),f->GetNode(1),f->GetNode(4));
450 AddTLinkNode(f->GetNode(1),f->GetNode(2),f->GetNode(5));
451 AddTLinkNode(f->GetNode(2),f->GetNode(3),f->GetNode(6));
452 AddTLinkNode(f->GetNode(3),f->GetNode(0),f->GetNode(7)); break;
459 //================================================================================
461 * \brief Add quadratic links of volume to own data structure
463 //================================================================================
465 bool SMESH_MesherHelper::AddTLinks(const SMDS_MeshVolume* volume)
467 if ( volume->IsQuadratic() )
469 SMDS_VolumeTool vTool( volume );
470 const SMDS_MeshNode** nodes = vTool.GetNodes();
472 for ( int iF = 1; iF < vTool.NbFaces(); ++iF )
474 const int nbN = vTool.NbFaceNodes( iF );
475 const int* iNodes = vTool.GetFaceNodesIndices( iF );
476 for ( int i = 0; i < nbN; )
478 int iN1 = iNodes[i++];
479 int iN12 = iNodes[i++];
481 if ( iN1 > iN2 ) std::swap( iN1, iN2 );
482 int linkID = iN1 * vTool.NbNodes() + iN2;
483 pair< set<int>::iterator, bool > it_isNew = addedLinks.insert( linkID );
484 if ( it_isNew.second )
485 AddTLinkNode( nodes[iN1], nodes[iN2], nodes[iN12] );
487 addedLinks.erase( it_isNew.first ); // each link encounters only twice
489 if ( vTool.NbNodes() == 27 )
491 const SMDS_MeshNode* nFCenter = nodes[ vTool.GetCenterNodeIndex( iF )];
492 if ( nFCenter->GetPosition()->GetTypeOfPosition() == SMDS_TOP_3DSPACE )
493 myMapWithCentralNode.insert
494 ( make_pair( TBiQuad( nodes[ iNodes[0]], nodes[ iNodes[1]],
495 nodes[ iNodes[2]], nodes[ iNodes[3]] ),
504 //================================================================================
506 * \brief Return true if position of nodes on the shape hasn't yet been checked or
507 * the positions proved to be invalid
509 //================================================================================
511 bool SMESH_MesherHelper::toCheckPosOnShape(int shapeID ) const
513 map< int,bool >::const_iterator id_ok = myNodePosShapesValidity.find( shapeID );
514 return ( id_ok == myNodePosShapesValidity.end() || !id_ok->second );
517 //================================================================================
519 * \brief Set validity of positions of nodes on the shape.
520 * Once set, validity is not changed
522 //================================================================================
524 void SMESH_MesherHelper::setPosOnShapeValidity(int shapeID, bool ok ) const
526 std::map< int,bool >::iterator sh_ok =
527 ((SMESH_MesherHelper*)this)->myNodePosShapesValidity.insert( make_pair( shapeID, ok)).first;
532 //=======================================================================
533 //function : ToFixNodeParameters
534 //purpose : Enables fixing node parameters on EDGEs and FACEs in
535 // GetNodeU(...,check=true), GetNodeUV(...,check=true), CheckNodeUV() and
536 // CheckNodeU() in case if a node lies on a shape set via SetSubShape().
538 //=======================================================================
540 void SMESH_MesherHelper::ToFixNodeParameters(bool toFix)
542 myFixNodeParameters = toFix;
546 //=======================================================================
547 //function : getUVOnSeam
548 //purpose : Select UV on either of 2 pcurves of a seam edge, closest to the given UV
549 //=======================================================================
551 gp_Pnt2d SMESH_MesherHelper::getUVOnSeam( const gp_Pnt2d& uv1, const gp_Pnt2d& uv2 ) const
553 gp_Pnt2d result = uv1;
554 for ( int i = U_periodic; i <= V_periodic ; ++i )
556 if ( myParIndex & i )
558 double p1 = uv1.Coord( i );
559 double dp1 = Abs( p1-myPar1[i-1]), dp2 = Abs( p1-myPar2[i-1]);
560 if ( myParIndex == i ||
561 dp1 < ( myPar2[i-1] - myPar1[i-1] ) / 100. ||
562 dp2 < ( myPar2[i-1] - myPar1[i-1] ) / 100. )
564 double p2 = uv2.Coord( i );
565 double p1Alt = ( dp1 < dp2 ) ? myPar2[i-1] : myPar1[i-1];
566 if ( Abs( p2 - p1 ) > Abs( p2 - p1Alt ))
567 result.SetCoord( i, p1Alt );
574 //=======================================================================
575 //function : GetNodeUV
576 //purpose : Return node UV on face
577 //=======================================================================
579 gp_XY SMESH_MesherHelper::GetNodeUV(const TopoDS_Face& F,
580 const SMDS_MeshNode* n,
581 const SMDS_MeshNode* n2,
584 gp_Pnt2d uv( Precision::Infinite(), Precision::Infinite() );
586 const SMDS_PositionPtr Pos = n->GetPosition();
588 if ( Pos->GetTypeOfPosition() == SMDS_TOP_FACE )
590 // node has position on face
591 const SMDS_FacePosition* fpos = static_cast<const SMDS_FacePosition*>( Pos );
592 uv.SetCoord( fpos->GetUParameter(), fpos->GetVParameter() );
594 uvOK = CheckNodeUV( F, n, uv.ChangeCoord(), 2.*getFaceMaxTol( F )); // 2. from 22830
596 else if ( Pos->GetTypeOfPosition() == SMDS_TOP_EDGE )
598 // node has position on EDGE => it is needed to find
599 // corresponding EDGE from FACE, get pcurve for this
600 // EDGE and retrieve value from this pcurve
601 const SMDS_EdgePosition* epos = static_cast<const SMDS_EdgePosition*>( Pos );
602 const int edgeID = n->getshapeId();
603 const TopoDS_Edge& E = TopoDS::Edge( GetMeshDS()->IndexToShape( edgeID ));
604 double f, l, u = epos->GetUParameter();
605 Handle(Geom2d_Curve) C2d = BRep_Tool::CurveOnSurface( E, F, f, l );
606 bool validU = ( !C2d.IsNull() && ( f < u ) && ( u < l ));
607 if ( validU ) uv = C2d->Value( u );
608 else uv.SetCoord( Precision::Infinite(),0.);
609 if ( check || !validU )
610 uvOK = CheckNodeUV( F, n, uv.ChangeCoord(), 2.*getFaceMaxTol( F ),/*force=*/ !validU );
612 // for a node on a seam EDGE select one of UVs on 2 pcurves
613 if ( n2 && IsSeamShape( edgeID ))
615 uv = getUVOnSeam( uv, GetNodeUV( F, n2, 0, check ));
618 { // adjust uv to period
620 Handle(Geom_Surface) S = BRep_Tool::Surface(F,loc);
621 Standard_Boolean isUPeriodic = S->IsUPeriodic();
622 Standard_Boolean isVPeriodic = S->IsVPeriodic();
624 if ( isUPeriodic || isVPeriodic ) {
625 Standard_Real UF,UL,VF,VL;
626 S->Bounds(UF,UL,VF,VL);
627 if ( isUPeriodic ) newUV.SetX( uv.X() + ShapeAnalysis::AdjustToPeriod(uv.X(),UF,UL));
628 if ( isVPeriodic ) newUV.SetY( uv.Y() + ShapeAnalysis::AdjustToPeriod(uv.Y(),VF,VL));
632 gp_Pnt2d uv2 = GetNodeUV( F, n2, 0, check );
633 if ( isUPeriodic && Abs( uv.X()-uv2.X() ) < Abs( newUV.X()-uv2.X() ))
634 newUV.SetX( uv.X() );
635 if ( isVPeriodic && Abs( uv.Y()-uv2.Y() ) < Abs( newUV.Y()-uv2.Y() ))
636 newUV.SetY( uv.Y() );
642 else if ( Pos->GetTypeOfPosition() == SMDS_TOP_VERTEX )
644 if ( int vertexID = n->getshapeId() ) {
645 const TopoDS_Vertex& V = TopoDS::Vertex(GetMeshDS()->IndexToShape(vertexID));
647 uv = BRep_Tool::Parameters( V, F );
650 catch (Standard_Failure& exc) {
654 if ( !IsSubShape( V, F ))
656 MESSAGE ( "SMESH_MesherHelper::GetNodeUV(); Vertex " << vertexID
657 << " not in face " << GetMeshDS()->ShapeToIndex( F ) );
658 // get UV of a vertex closest to the node
660 gp_Pnt pn = XYZ( n );
661 for ( TopExp_Explorer vert( F,TopAbs_VERTEX ); !uvOK && vert.More(); vert.Next() ) {
662 TopoDS_Vertex curV = TopoDS::Vertex( vert.Current() );
663 gp_Pnt p = BRep_Tool::Pnt( curV );
664 double curDist = p.SquareDistance( pn );
665 if ( curDist < dist ) {
667 uv = BRep_Tool::Parameters( curV, F );
668 uvOK = ( dist < DBL_MIN );
675 TopTools_ListIteratorOfListOfShape it( myMesh->GetAncestors( V ));
676 for ( ; it.More(); it.Next() ) {
677 if ( it.Value().ShapeType() == TopAbs_EDGE ) {
678 const TopoDS_Edge & edge = TopoDS::Edge( it.Value() );
680 Handle(Geom2d_Curve) C2d = BRep_Tool::CurveOnSurface(edge, F, f, l);
681 if ( !C2d.IsNull() ) {
682 double u = ( V == IthVertex( 0, edge )) ? f : l;
683 uv = C2d->Value( u );
689 if ( !uvOK && V.Orientation() == TopAbs_INTERNAL )
691 Handle(ShapeAnalysis_Surface) projector = GetSurface( F );
692 if ( n2 ) uv = GetNodeUV( F, n2 );
693 if ( Precision::IsInfinite( uv.X() ))
694 uv = projector->NextValueOfUV( uv, BRep_Tool::Pnt( V ), BRep_Tool::Tolerance( F ));
696 uv = projector->ValueOfUV( BRep_Tool::Pnt( V ), BRep_Tool::Tolerance( F ));
697 uvOK = ( projector->Gap() < getFaceMaxTol( F ));
701 if ( n2 && IsSeamShape( vertexID ))
703 bool isSeam = ( myShape.IsSame( F ));
705 SMESH_MesherHelper h( *myMesh );
707 isSeam = IsSeamShape( vertexID );
711 uv = getUVOnSeam( uv, GetNodeUV( F, n2, 0 ));
717 uvOK = CheckNodeUV( F, n, uv.ChangeCoord(), 2.*getFaceMaxTol( F ));
720 if ( check && !uvOK )
726 //=======================================================================
727 //function : CheckNodeUV
728 //purpose : Check and fix node UV on a face
729 //=======================================================================
731 bool SMESH_MesherHelper::CheckNodeUV(const TopoDS_Face& F,
732 const SMDS_MeshNode* n,
736 double distXYZ[4]) const
738 int shapeID = n->getshapeId();
740 if (( infinit = ( Precision::IsInfinite( uv.X() ) || Precision::IsInfinite( uv.Y() ))) ||
742 ( uv.X() == 0. && uv.Y() == 0. ) ||
743 ( toCheckPosOnShape( shapeID )))
745 // check that uv is correct
747 Handle(Geom_Surface) surface = BRep_Tool::Surface( F,loc );
748 gp_Pnt nodePnt = XYZ( n ), surfPnt(0,0,0);
750 if ( !loc.IsIdentity() ) nodePnt.Transform( loc.Transformation().Inverted() );
752 (dist = nodePnt.Distance( surfPnt = surface->Value( uv.X(), uv.Y() ))) > tol )
754 setPosOnShapeValidity( shapeID, false );
755 if ( !infinit && distXYZ ) {
756 surfPnt.Transform( loc );
758 distXYZ[1] = surfPnt.X(); distXYZ[2] = surfPnt.Y(); distXYZ[3]=surfPnt.Z();
760 // uv incorrect, project the node to surface
761 GeomAPI_ProjectPointOnSurf& projector = GetProjector( F, loc, tol );
762 projector.Perform( nodePnt );
763 if ( !projector.IsDone() || projector.NbPoints() < 1 )
765 MESSAGE( "SMESH_MesherHelper::CheckNodeUV() failed to project" );
768 Quantity_Parameter U,V;
769 projector.LowerDistanceParameters(U,V);
771 surfPnt = surface->Value( U, V );
772 dist = nodePnt.Distance( surfPnt );
774 surfPnt.Transform( loc );
776 distXYZ[1] = surfPnt.X(); distXYZ[2] = surfPnt.Y(); distXYZ[3]=surfPnt.Z();
780 MESSAGE( "SMESH_MesherHelper::CheckNodeUV(), invalid projection" );
783 // store the fixed UV on the face
784 if ( myShape.IsSame(F) && shapeID == myShapeID && myFixNodeParameters )
785 const_cast<SMDS_MeshNode*>(n)->SetPosition
786 ( SMDS_PositionPtr( new SMDS_FacePosition( U, V )));
788 else if ( myShape.IsSame(F) && uv.Modulus() > numeric_limits<double>::min() )
790 setPosOnShapeValidity( shapeID, true );
796 //=======================================================================
797 //function : GetProjector
798 //purpose : Return projector intitialized by given face without location, which is returned
799 //=======================================================================
801 GeomAPI_ProjectPointOnSurf& SMESH_MesherHelper::GetProjector(const TopoDS_Face& F,
802 TopLoc_Location& loc,
805 Handle(Geom_Surface) surface = BRep_Tool::Surface( F,loc );
806 int faceID = GetMeshDS()->ShapeToIndex( F );
807 TID2ProjectorOnSurf& i2proj = const_cast< TID2ProjectorOnSurf&>( myFace2Projector );
808 TID2ProjectorOnSurf::iterator i_proj = i2proj.find( faceID );
809 if ( i_proj == i2proj.end() )
811 if ( tol == 0 ) tol = BRep_Tool::Tolerance( F );
812 double U1, U2, V1, V2;
813 surface->Bounds(U1, U2, V1, V2);
814 GeomAPI_ProjectPointOnSurf* proj = new GeomAPI_ProjectPointOnSurf();
815 proj->Init( surface, U1, U2, V1, V2, tol );
816 i_proj = i2proj.insert( make_pair( faceID, proj )).first;
818 return *( i_proj->second );
821 //=======================================================================
822 //function : GetSurface
823 //purpose : Return a cached ShapeAnalysis_Surface of a FACE
824 //=======================================================================
826 Handle(ShapeAnalysis_Surface) SMESH_MesherHelper::GetSurface(const TopoDS_Face& F ) const
828 Handle(Geom_Surface) surface = BRep_Tool::Surface( F );
829 int faceID = GetMeshDS()->ShapeToIndex( F );
830 TID2Surface::iterator i_surf = myFace2Surface.find( faceID );
831 if ( i_surf == myFace2Surface.end() && faceID )
833 Handle(ShapeAnalysis_Surface) surf( new ShapeAnalysis_Surface( surface ));
834 i_surf = myFace2Surface.insert( make_pair( faceID, surf )).first;
836 return i_surf->second;
841 gp_XY AverageUV(const gp_XY& uv1, const gp_XY& uv2) { return ( uv1 + uv2 ) / 2.; }
842 gp_XY_FunPtr(Added); // define gp_XY_Added pointer to function calling gp_XY::Added(gp_XY)
843 gp_XY_FunPtr(Subtracted);
846 //=======================================================================
847 //function : ApplyIn2D
848 //purpose : Perform given operation on two 2d points in parameric space of given surface.
849 // It takes into account period of the surface. Use gp_XY_FunPtr macro
850 // to easily define pointer to function of gp_XY class.
851 //=======================================================================
853 gp_XY SMESH_MesherHelper::ApplyIn2D(Handle(Geom_Surface) surface,
857 const bool resultInPeriod)
859 if ( surface->IsKind(STANDARD_TYPE(Geom_RectangularTrimmedSurface )))
860 surface = Handle(Geom_RectangularTrimmedSurface)::DownCast( surface )->BasisSurface();
861 Standard_Boolean isUPeriodic = surface.IsNull() ? false : surface->IsUPeriodic();
862 Standard_Boolean isVPeriodic = surface.IsNull() ? false : surface->IsVPeriodic();
863 if ( !isUPeriodic && !isVPeriodic )
866 // move uv2 not far than half-period from uv1
868 uv2.X()+(isUPeriodic ? ShapeAnalysis::AdjustByPeriod(uv2.X(),uv1.X(),surface->UPeriod()) :0);
870 uv2.Y()+(isVPeriodic ? ShapeAnalysis::AdjustByPeriod(uv2.Y(),uv1.Y(),surface->VPeriod()) :0);
873 gp_XY res = fun( uv1, gp_XY(u2,v2) );
875 // move result within period
876 if ( resultInPeriod )
878 Standard_Real UF,UL,VF,VL;
879 surface->Bounds(UF,UL,VF,VL);
881 res.SetX( res.X() + ShapeAnalysis::AdjustToPeriod(res.X(),UF,UL));
883 res.SetY( res.Y() + ShapeAnalysis::AdjustToPeriod(res.Y(),VF,VL));
889 //=======================================================================
890 //function : AdjustByPeriod
891 //purpose : Move node positions on a FACE within surface period
892 //=======================================================================
894 void SMESH_MesherHelper::AdjustByPeriod( const TopoDS_Face& face, gp_XY uv[], const int nbUV )
896 SMESH_MesherHelper h( *myMesh ), *ph = face.IsSame( myShape ) ? this : &h;
897 ph->SetSubShape( face );
899 for ( int iCoo = U_periodic; iCoo <= V_periodic; ++iCoo )
900 if ( ph->GetPeriodicIndex() & iCoo )
902 const double period = ( ph->myPar2[iCoo-1] - ph->myPar1[iCoo-1] );
903 const double xRef = uv[0].Coord( iCoo );
904 for ( int i = 1; i < nbUV; ++i )
906 double x = uv[i].Coord( iCoo );
907 double dx = ShapeAnalysis::AdjustByPeriod( x, xRef, period );
908 uv[i].SetCoord( iCoo, x + dx );
913 //=======================================================================
914 //function : GetMiddleUV
915 //purpose : Return middle UV taking in account surface period
916 //=======================================================================
918 gp_XY SMESH_MesherHelper::GetMiddleUV(const Handle(Geom_Surface)& surface,
923 // the proper place of getting basic surface seems to be in ApplyIn2D()
924 // but we put it here to decrease a risk of regressions just before releasing a version
925 // Handle(Geom_Surface) surf = surface;
926 // while ( !surf.IsNull() && surf->IsKind(STANDARD_TYPE(Geom_RectangularTrimmedSurface )))
927 // surf = Handle(Geom_RectangularTrimmedSurface)::DownCast( surf )->BasisSurface();
929 return ApplyIn2D( surface, p1, p2, & AverageUV );
932 //=======================================================================
933 //function : GetCenterUV
934 //purpose : Return UV for the central node of a biquadratic triangle
935 //=======================================================================
937 gp_XY SMESH_MesherHelper::GetCenterUV(const gp_XY& uv1,
943 bool * isBadTria/*=0*/)
946 gp_XY uvAvg = ( uv12 + uv23 + uv31 ) / 3.;
948 if (( badTria = (( uvAvg - uv1 ) * ( uvAvg - uv23 ) > 0 )))
949 uvAvg = ( uv1 + uv23 ) / 2.;
950 else if (( badTria = (( uvAvg - uv2 ) * ( uvAvg - uv31 ) > 0 )))
951 uvAvg = ( uv2 + uv31 ) / 2.;
952 else if (( badTria = (( uvAvg - uv3 ) * ( uvAvg - uv12 ) > 0 )))
953 uvAvg = ( uv3 + uv12 ) / 2.;
956 *isBadTria = badTria;
960 //=======================================================================
961 //function : GetNodeU
962 //purpose : Return node U on edge
963 //=======================================================================
965 double SMESH_MesherHelper::GetNodeU(const TopoDS_Edge& E,
966 const SMDS_MeshNode* n,
967 const SMDS_MeshNode* inEdgeNode,
970 double param = Precision::Infinite();
972 const SMDS_PositionPtr pos = n->GetPosition();
973 if ( pos->GetTypeOfPosition()==SMDS_TOP_EDGE )
975 const SMDS_EdgePosition* epos = static_cast<const SMDS_EdgePosition*>( pos );
976 param = epos->GetUParameter();
978 else if( pos->GetTypeOfPosition() == SMDS_TOP_VERTEX )
980 if ( inEdgeNode && TopExp::FirstVertex( E ).IsSame( TopExp::LastVertex( E ))) // issue 0020128
983 BRep_Tool::Range( E, f,l );
984 double uInEdge = GetNodeU( E, inEdgeNode );
985 param = ( fabs( uInEdge - f ) < fabs( l - uInEdge )) ? f : l;
989 SMESHDS_Mesh * meshDS = GetMeshDS();
990 int vertexID = n->getshapeId();
991 const TopoDS_Vertex& V = TopoDS::Vertex(meshDS->IndexToShape(vertexID));
992 param = BRep_Tool::Parameter( V, E );
997 double tol = BRep_Tool::Tolerance( E );
998 double f,l; BRep_Tool::Range( E, f,l );
999 bool force = ( param < f-tol || param > l+tol );
1000 if ( !force && pos->GetTypeOfPosition()==SMDS_TOP_EDGE )
1001 force = ( GetMeshDS()->ShapeToIndex( E ) != n->getshapeId() );
1003 *check = CheckNodeU( E, n, param, 2*tol, force );
1008 //=======================================================================
1009 //function : CheckNodeU
1010 //purpose : Check and fix node U on an edge
1011 // Return false if U is bad and could not be fixed
1012 //=======================================================================
1014 bool SMESH_MesherHelper::CheckNodeU(const TopoDS_Edge& E,
1015 const SMDS_MeshNode* n,
1019 double distXYZ[4]) const
1021 int shapeID = n->getshapeId();
1023 if (( infinit = Precision::IsInfinite( u )) ||
1026 ( toCheckPosOnShape( shapeID )))
1028 TopLoc_Location loc; double f,l;
1029 Handle(Geom_Curve) curve = BRep_Tool::Curve( E,loc,f,l );
1030 if ( curve.IsNull() ) // degenerated edge
1032 if ( u+tol < f || u-tol > l )
1034 double r = Max( 0.5, 1 - tol*n->GetID()); // to get a unique u on edge
1040 gp_Pnt nodePnt = SMESH_TNodeXYZ( n );
1041 if ( !loc.IsIdentity() ) nodePnt.Transform( loc.Transformation().Inverted() );
1043 double dist = 2*tol;
1046 curvPnt = curve->Value( u );
1047 dist = nodePnt.Distance( curvPnt );
1049 curvPnt.Transform( loc );
1051 distXYZ[1] = curvPnt.X(); distXYZ[2] = curvPnt.Y(); distXYZ[3]=curvPnt.Z();
1056 setPosOnShapeValidity( shapeID, false );
1057 // u incorrect, project the node to the curve
1058 int edgeID = GetMeshDS()->ShapeToIndex( E );
1059 TID2ProjectorOnCurve& i2proj = const_cast< TID2ProjectorOnCurve&>( myEdge2Projector );
1060 TID2ProjectorOnCurve::iterator i_proj =
1061 i2proj.insert( make_pair( edgeID, (GeomAPI_ProjectPointOnCurve*) 0 )).first;
1062 if ( !i_proj->second )
1064 i_proj->second = new GeomAPI_ProjectPointOnCurve();
1065 i_proj->second->Init( curve, f, l );
1067 GeomAPI_ProjectPointOnCurve* projector = i_proj->second;
1068 projector->Perform( nodePnt );
1069 if ( projector->NbPoints() < 1 )
1071 MESSAGE( "SMESH_MesherHelper::CheckNodeU() failed to project" );
1074 Quantity_Parameter U = projector->LowerDistanceParameter();
1076 MESSAGE(" f " << f << " l " << l << " u " << u);
1077 curvPnt = curve->Value( u );
1078 dist = nodePnt.Distance( curvPnt );
1080 curvPnt.Transform( loc );
1082 distXYZ[1] = curvPnt.X(); distXYZ[2] = curvPnt.Y(); distXYZ[3]=curvPnt.Z();
1086 MESSAGE( "SMESH_MesherHelper::CheckNodeU(), invalid projection" );
1087 MESSAGE("distance " << dist << " " << tol );
1090 // store the fixed U on the edge
1091 if ( myShape.IsSame(E) && shapeID == myShapeID && myFixNodeParameters )
1092 const_cast<SMDS_MeshNode*>(n)->SetPosition
1093 ( SMDS_PositionPtr( new SMDS_EdgePosition( U )));
1095 else if ( fabs( u ) > numeric_limits<double>::min() )
1097 setPosOnShapeValidity( shapeID, true );
1099 if (( u < f-tol || u > l+tol ) && force )
1101 MESSAGE("u < f-tol || u > l+tol ; u " << u << " f " << f << " l " << l);
1102 // node is on vertex but is set on periodic but trimmed edge (issue 0020890)
1105 // do not use IsPeriodic() as Geom_TrimmedCurve::IsPeriodic () returns false
1106 double period = curve->Period();
1107 u = ( u < f ) ? u + period : u - period;
1109 catch (Standard_Failure& exc)
1119 //=======================================================================
1120 //function : GetMediumPos
1121 //purpose : Return index and type of the shape (EDGE or FACE only) to
1122 // set a medium node on
1123 //param : useCurSubShape - if true, returns the shape set via SetSubShape()
1125 //param : expectedSupport - shape type corresponding to element being created,
1126 // e.g TopAbs_EDGE if SMDSAbs_Edge is created
1127 // basing on \a n1 and \a n2
1128 // Calling GetMediumPos() with useCurSubShape=true is OK only for the
1129 // case where the lower dim mesh is already constructed and converted to quadratic,
1130 // else, nodes on EDGEs are assigned to FACE, for example.
1131 //=======================================================================
1133 std::pair<int, TopAbs_ShapeEnum>
1134 SMESH_MesherHelper::GetMediumPos(const SMDS_MeshNode* n1,
1135 const SMDS_MeshNode* n2,
1136 const bool useCurSubShape,
1137 TopAbs_ShapeEnum expectedSupport)
1139 if ( useCurSubShape && !myShape.IsNull() )
1140 return std::make_pair( myShapeID, myShape.ShapeType() );
1142 TopAbs_ShapeEnum shapeType = TopAbs_SHAPE;
1146 if (( myShapeID == n1->getshapeId() || myShapeID == n2->getshapeId() ) && myShapeID > 0 )
1148 shapeType = myShape.ShapeType();
1149 shapeID = myShapeID;
1151 else if ( n1->getshapeId() == n2->getshapeId() )
1153 shapeID = n2->getshapeId();
1154 shape = GetSubShapeByNode( n1, GetMeshDS() );
1156 else // 2 different shapes
1158 const SMDS_TypeOfPosition Pos1 = n1->GetPosition()->GetTypeOfPosition();
1159 const SMDS_TypeOfPosition Pos2 = n2->GetPosition()->GetTypeOfPosition();
1161 if ( Pos1 == SMDS_TOP_3DSPACE || Pos2 == SMDS_TOP_3DSPACE )
1165 else if ( Pos1 == SMDS_TOP_FACE || Pos2 == SMDS_TOP_FACE )
1168 if ( Pos1 != SMDS_TOP_FACE || Pos2 != SMDS_TOP_FACE ) // not 2 FACEs
1170 if ( Pos1 != SMDS_TOP_FACE ) std::swap( n1,n2 );
1171 TopoDS_Shape F = GetSubShapeByNode( n1, GetMeshDS() );
1172 TopoDS_Shape S = GetSubShapeByNode( n2, GetMeshDS() );
1173 if ( IsSubShape( S, F ))
1175 shapeType = TopAbs_FACE;
1176 shapeID = n1->getshapeId();
1180 else if ( Pos1 == SMDS_TOP_EDGE && Pos2 == SMDS_TOP_EDGE )
1182 TopoDS_Shape E1 = GetSubShapeByNode( n1, GetMeshDS() );
1183 TopoDS_Shape E2 = GetSubShapeByNode( n2, GetMeshDS() );
1184 shape = GetCommonAncestor( E1, E2, *myMesh, TopAbs_FACE );
1186 else if ( Pos1 == SMDS_TOP_VERTEX && Pos2 == SMDS_TOP_VERTEX )
1188 TopoDS_Shape V1 = GetSubShapeByNode( n1, GetMeshDS() );
1189 TopoDS_Shape V2 = GetSubShapeByNode( n2, GetMeshDS() );
1190 shape = GetCommonAncestor( V1, V2, *myMesh, TopAbs_EDGE );
1191 if ( shape.IsNull() ) shape = GetCommonAncestor( V1, V2, *myMesh, TopAbs_FACE );
1193 else // on VERTEX and EDGE
1195 if ( Pos1 != SMDS_TOP_VERTEX ) std::swap( n1,n2 );
1196 TopoDS_Shape V = GetSubShapeByNode( n1, GetMeshDS() );
1197 TopoDS_Shape E = GetSubShapeByNode( n2, GetMeshDS() );
1198 if ( IsSubShape( V, E ))
1201 shape = GetCommonAncestor( V, E, *myMesh, TopAbs_FACE );
1205 if ( !shape.IsNull() )
1208 shapeID = GetMeshDS()->ShapeToIndex( shape );
1209 shapeType = shape.ShapeType(); // EDGE or FACE
1211 if ( expectedSupport < shapeType &&
1212 expectedSupport != TopAbs_SHAPE &&
1213 !myShape.IsNull() &&
1214 myShape.ShapeType() == expectedSupport )
1216 // e.g. a side of triangle connects nodes on the same EDGE but does not
1217 // lie on this EDGE (an arc with a coarse mesh)
1218 // => shapeType == TopAbs_EDGE, expectedSupport == TopAbs_FACE;
1219 // hope that myShape is a right shape, return it if the found shape
1220 // has converted elements of corresponding dim (segments in our example)
1221 int nbConvertedElems = 0;
1222 SMDSAbs_ElementType type = ( shapeType == TopAbs_FACE ? SMDSAbs_Face : SMDSAbs_Edge );
1223 for ( int iN = 0; iN < 2; ++iN )
1225 const SMDS_MeshNode* n = iN ? n2 : n1;
1226 SMDS_ElemIteratorPtr it = n->GetInverseElementIterator( type );
1227 while ( it->more() )
1229 const SMDS_MeshElement* elem = it->next();
1230 if ( elem->getshapeId() == shapeID &&
1231 elem->IsQuadratic() )
1238 if ( nbConvertedElems == 2 )
1240 shapeType = myShape.ShapeType();
1241 shapeID = myShapeID;
1245 return make_pair( shapeID, shapeType );
1248 //=======================================================================
1249 //function : GetCentralNode
1250 //purpose : Return existing or create a new central node for a quardilateral
1251 // quadratic face given its 8 nodes.
1252 //@param : force3d - true means node creation in between the given nodes,
1253 // else node position is found on a geometrical face if any.
1254 //=======================================================================
1256 const SMDS_MeshNode* SMESH_MesherHelper::GetCentralNode(const SMDS_MeshNode* n1,
1257 const SMDS_MeshNode* n2,
1258 const SMDS_MeshNode* n3,
1259 const SMDS_MeshNode* n4,
1260 const SMDS_MeshNode* n12,
1261 const SMDS_MeshNode* n23,
1262 const SMDS_MeshNode* n34,
1263 const SMDS_MeshNode* n41,
1266 SMDS_MeshNode *centralNode = 0; // central node to return
1268 // Find an existing central node
1270 TBiQuad keyOfMap(n1,n2,n3,n4);
1271 std::map<TBiQuad, const SMDS_MeshNode* >::iterator itMapCentralNode;
1272 itMapCentralNode = myMapWithCentralNode.find( keyOfMap );
1273 if ( itMapCentralNode != myMapWithCentralNode.end() )
1275 return (*itMapCentralNode).second;
1278 // Get type of shape for the new central node
1280 TopAbs_ShapeEnum shapeType = TopAbs_SHAPE;
1284 TopTools_ListIteratorOfListOfShape it;
1286 std::map< int, int > faceId2nbNodes;
1287 std::map< int, int > ::iterator itMapWithIdFace;
1289 SMESHDS_Mesh* meshDS = GetMeshDS();
1291 // check if a face lies on a FACE, i.e. its all corner nodes lie either on the FACE or
1292 // on sub-shapes of the FACE
1293 if ( GetMesh()->HasShapeToMesh() )
1295 const SMDS_MeshNode* nodes[] = { n1, n2, n3, n4 };
1296 for(int i = 0; i < 4; i++)
1298 shape = GetSubShapeByNode( nodes[i], meshDS );
1299 if ( shape.IsNull() ) break;
1300 if ( shape.ShapeType() == TopAbs_SOLID )
1302 solidID = nodes[i]->getshapeId();
1303 shapeType = TopAbs_SOLID;
1306 if ( shape.ShapeType() == TopAbs_FACE )
1308 faceID = nodes[i]->getshapeId();
1309 itMapWithIdFace = faceId2nbNodes.insert( std::make_pair( faceID, 0 ) ).first;
1310 itMapWithIdFace->second++;
1314 PShapeIteratorPtr it = GetAncestors( shape, *GetMesh(), TopAbs_FACE );
1315 while ( const TopoDS_Shape* face = it->next() )
1317 faceID = meshDS->ShapeToIndex( *face );
1318 itMapWithIdFace = faceId2nbNodes.insert( std::make_pair( faceID, 0 )).first;
1319 itMapWithIdFace->second++;
1324 if ( solidID < 1 && !faceId2nbNodes.empty() ) // SOLID not found
1326 // find ID of the FACE the four corner nodes belong to
1327 itMapWithIdFace = faceId2nbNodes.find( myShapeID ); // IPAL52698
1328 if ( itMapWithIdFace != faceId2nbNodes.end() &&
1329 itMapWithIdFace->second == 4 )
1331 shapeType = TopAbs_FACE;
1336 itMapWithIdFace = faceId2nbNodes.begin();
1337 for ( ; itMapWithIdFace != faceId2nbNodes.end(); ++itMapWithIdFace)
1339 if ( itMapWithIdFace->second == 4 )
1341 shapeType = TopAbs_FACE;
1342 faceID = (*itMapWithIdFace).first;
1350 if ( shapeType == TopAbs_FACE )
1352 F = TopoDS::Face( meshDS->IndexToShape( faceID ));
1359 bool toCheck = true;
1360 if ( !F.IsNull() && !force3d )
1363 GetNodeUV( F,n1, n3, &toCheck ),
1364 GetNodeUV( F,n2, n4, &toCheck ),
1365 GetNodeUV( F,n3, n1, &toCheck ),
1366 GetNodeUV( F,n4, n2, &toCheck ),
1367 GetNodeUV( F,n12, n3 ),
1368 GetNodeUV( F,n23, n4 ),
1369 GetNodeUV( F,n34, n2 ),
1370 GetNodeUV( F,n41, n2 )
1372 AdjustByPeriod( F, uv, 8 ); // put uv[] within a period (IPAL52698)
1374 uvAvg = calcTFI (0.5, 0.5, uv[0],uv[1],uv[2],uv[3], uv[4],uv[5],uv[6],uv[7] );
1376 TopLoc_Location loc;
1377 Handle( Geom_Surface ) S = BRep_Tool::Surface( F, loc );
1378 P = S->Value( uvAvg.X(), uvAvg.Y() ).Transformed( loc );
1379 centralNode = meshDS->AddNode( P.X(), P.Y(), P.Z() );
1380 // if ( mySetElemOnShape ) node is not elem!
1381 meshDS->SetNodeOnFace( centralNode, faceID, uvAvg.X(), uvAvg.Y() );
1383 else // ( force3d || F.IsNull() )
1385 P = calcTFI (0.5, 0.5,
1386 SMESH_TNodeXYZ(n1), SMESH_TNodeXYZ(n2),
1387 SMESH_TNodeXYZ(n3), SMESH_TNodeXYZ(n4),
1388 SMESH_TNodeXYZ(n12), SMESH_TNodeXYZ(n23),
1389 SMESH_TNodeXYZ(n34), SMESH_TNodeXYZ(n41));
1390 centralNode = meshDS->AddNode( P.X(), P.Y(), P.Z() );
1392 if ( !F.IsNull() ) // force3d
1394 uvAvg = (GetNodeUV(F,n1,n3,&toCheck) +
1395 GetNodeUV(F,n2,n4,&toCheck) +
1396 GetNodeUV(F,n3,n1,&toCheck) +
1397 GetNodeUV(F,n4,n2,&toCheck)) / 4;
1398 //CheckNodeUV( F, centralNode, uvAvg, 2*BRep_Tool::Tolerance( F ), /*force=*/true);
1399 meshDS->SetNodeOnFace( centralNode, faceID, uvAvg.X(), uvAvg.Y() );
1401 else if ( solidID > 0 )
1403 meshDS->SetNodeInVolume( centralNode, solidID );
1405 else if ( myShapeID > 0 && mySetElemOnShape )
1407 meshDS->SetMeshElementOnShape( centralNode, myShapeID );
1410 myMapWithCentralNode.insert( std::make_pair( keyOfMap, centralNode ) );
1414 //=======================================================================
1415 //function : GetCentralNode
1416 //purpose : Return existing or create a new central node for a
1417 // quadratic triangle given its 6 nodes.
1418 //@param : force3d - true means node creation in between the given nodes,
1419 // else node position is found on a geometrical face if any.
1420 //=======================================================================
1422 const SMDS_MeshNode* SMESH_MesherHelper::GetCentralNode(const SMDS_MeshNode* n1,
1423 const SMDS_MeshNode* n2,
1424 const SMDS_MeshNode* n3,
1425 const SMDS_MeshNode* n12,
1426 const SMDS_MeshNode* n23,
1427 const SMDS_MeshNode* n31,
1430 SMDS_MeshNode *centralNode = 0; // central node to return
1432 // Find an existing central node
1434 TBiQuad keyOfMap(n1,n2,n3);
1435 std::map<TBiQuad, const SMDS_MeshNode* >::iterator itMapCentralNode;
1436 itMapCentralNode = myMapWithCentralNode.find( keyOfMap );
1437 if ( itMapCentralNode != myMapWithCentralNode.end() )
1439 return (*itMapCentralNode).second;
1442 // Get type of shape for the new central node
1444 TopAbs_ShapeEnum shapeType = TopAbs_SHAPE;
1448 TopTools_ListIteratorOfListOfShape it;
1450 std::map< int, int > faceId2nbNodes;
1451 std::map< int, int > ::iterator itMapWithIdFace;
1453 SMESHDS_Mesh* meshDS = GetMeshDS();
1455 // check if a face lies on a FACE, i.e. its all corner nodes lie either on the FACE or
1456 // on sub-shapes of the FACE
1457 if ( GetMesh()->HasShapeToMesh() )
1459 const SMDS_MeshNode* nodes[] = { n1, n2, n3 };
1460 for(int i = 0; i < 3; i++)
1462 shape = GetSubShapeByNode( nodes[i], meshDS );
1463 if ( shape.IsNull() ) break;
1464 if ( shape.ShapeType() == TopAbs_SOLID )
1466 solidID = nodes[i]->getshapeId();
1467 shapeType = TopAbs_SOLID;
1470 if ( shape.ShapeType() == TopAbs_FACE )
1472 faceID = nodes[i]->getshapeId();
1473 itMapWithIdFace = faceId2nbNodes.insert( std::make_pair( faceID, 0 ) ).first;
1474 itMapWithIdFace->second++;
1478 PShapeIteratorPtr it = GetAncestors(shape, *GetMesh(), TopAbs_FACE );
1479 while ( const TopoDS_Shape* face = it->next() )
1481 faceID = meshDS->ShapeToIndex( *face );
1482 itMapWithIdFace = faceId2nbNodes.insert( std::make_pair( faceID, 0 ) ).first;
1483 itMapWithIdFace->second++;
1488 if ( solidID < 1 && !faceId2nbNodes.empty() ) // SOLID not found
1490 // find ID of the FACE the four corner nodes belong to
1491 itMapWithIdFace = faceId2nbNodes.find( myShapeID ); // IPAL52698
1492 if ( itMapWithIdFace != faceId2nbNodes.end() &&
1493 itMapWithIdFace->second == 4 )
1495 shapeType = TopAbs_FACE;
1500 itMapWithIdFace = faceId2nbNodes.begin();
1501 for ( ; itMapWithIdFace != faceId2nbNodes.end(); ++itMapWithIdFace)
1503 if ( itMapWithIdFace->second == 3 )
1505 shapeType = TopAbs_FACE;
1506 faceID = (*itMapWithIdFace).first;
1516 if ( shapeType == TopAbs_FACE )
1518 F = TopoDS::Face( meshDS->IndexToShape( faceID ));
1519 bool checkOK = true, badTria = false;
1521 GetNodeUV( F, n1, n23, &checkOK ),
1522 GetNodeUV( F, n2, n31, &checkOK ),
1523 GetNodeUV( F, n3, n12, &checkOK ),
1524 GetNodeUV( F, n12, n3, &checkOK ),
1525 GetNodeUV( F, n23, n1, &checkOK ),
1526 GetNodeUV( F, n31, n2, &checkOK )
1528 AdjustByPeriod( F, uv, 6 ); // put uv[] within a period (IPAL52698)
1530 uvAvg = GetCenterUV( uv[0],uv[1],uv[2], uv[3],uv[4],uv[5], &badTria );
1532 if ( badTria || !checkOK )
1536 // Create a central node
1539 if ( !F.IsNull() && !force3d )
1541 TopLoc_Location loc;
1542 Handle( Geom_Surface ) S = BRep_Tool::Surface( F, loc );
1543 P = S->Value( uvAvg.X(), uvAvg.Y() ).Transformed( loc );
1544 centralNode = meshDS->AddNode( P.X(), P.Y(), P.Z() );
1545 // if ( mySetElemOnShape ) node is not elem!
1546 meshDS->SetNodeOnFace( centralNode, faceID, uvAvg.X(), uvAvg.Y() );
1548 else // ( force3d || F.IsNull() )
1550 P = ( SMESH_TNodeXYZ( n12 ) +
1551 SMESH_TNodeXYZ( n23 ) +
1552 SMESH_TNodeXYZ( n31 ) ) / 3;
1553 centralNode = meshDS->AddNode( P.X(), P.Y(), P.Z() );
1555 if ( !F.IsNull() ) // force3d
1557 meshDS->SetNodeOnFace( centralNode, faceID, uvAvg.X(), uvAvg.Y() );
1559 else if ( solidID > 0 )
1561 meshDS->SetNodeInVolume( centralNode, solidID );
1563 else if ( myShapeID > 0 && mySetElemOnShape )
1565 meshDS->SetMeshElementOnShape( centralNode, myShapeID );
1568 myMapWithCentralNode.insert( std::make_pair( keyOfMap, centralNode ) );
1572 //=======================================================================
1573 //function : GetMediumNode
1574 //purpose : Return existing or create a new medium node between given ones
1575 //=======================================================================
1577 const SMDS_MeshNode* SMESH_MesherHelper::GetMediumNode(const SMDS_MeshNode* n1,
1578 const SMDS_MeshNode* n2,
1580 TopAbs_ShapeEnum expectedSupport)
1582 // Find existing node
1584 SMESH_TLink link(n1,n2);
1585 ItTLinkNode itLN = myTLinkNodeMap.find( link );
1586 if ( itLN != myTLinkNodeMap.end() ) {
1587 return (*itLN).second;
1590 // Create medium node
1593 SMESHDS_Mesh* meshDS = GetMeshDS();
1595 if ( IsSeamShape( n1->getshapeId() ))
1596 // to get a correct UV of a node on seam, the second node must have checked UV
1597 std::swap( n1, n2 );
1599 // get type of shape for the new medium node
1600 int faceID = -1, edgeID = -1;
1601 TopoDS_Edge E; double u [2];
1602 TopoDS_Face F; gp_XY uv[2];
1603 bool uvOK[2] = { true, true };
1604 const bool useCurSubShape = ( !myShape.IsNull() && myShape.ShapeType() == TopAbs_EDGE );
1606 pair<int, TopAbs_ShapeEnum> pos = GetMediumPos( n1, n2, useCurSubShape, expectedSupport );
1608 // get positions of the given nodes on shapes
1609 if ( pos.second == TopAbs_FACE )
1611 F = TopoDS::Face(meshDS->IndexToShape( faceID = pos.first ));
1612 uv[0] = GetNodeUV(F,n1,n2, force3d ? 0 : &uvOK[0]);
1613 if ( HasDegeneratedEdges() && !force3d ) // IPAL52850 (degen VERTEX not at singularity)
1615 // project middle point to a surface
1616 SMESH_TNodeXYZ p1( n1 ), p2( n2 );
1617 gp_Pnt pMid = 0.5 * ( p1 + p2 );
1618 Handle(ShapeAnalysis_Surface) projector = GetSurface( F );
1621 uvMid = projector->NextValueOfUV( uv[0], pMid, BRep_Tool::Tolerance( F ));
1623 uvMid = projector->ValueOfUV( pMid, getFaceMaxTol( F ));
1624 if ( projector->Gap() * projector->Gap() < ( p1 - p2 ).SquareModulus() / 4 )
1626 gp_Pnt pProj = projector->Value( uvMid );
1627 n12 = meshDS->AddNode( pProj.X(), pProj.Y(), pProj.Z() );
1628 meshDS->SetNodeOnFace( n12, faceID, uvMid.X(), uvMid.Y() );
1629 myTLinkNodeMap.insert( make_pair ( link, n12 ));
1633 uv[1] = GetNodeUV(F,n2,n1, force3d ? 0 : &uvOK[1]);
1635 else if ( pos.second == TopAbs_EDGE )
1637 const SMDS_PositionPtr Pos1 = n1->GetPosition();
1638 const SMDS_PositionPtr Pos2 = n2->GetPosition();
1639 if ( Pos1->GetTypeOfPosition()==SMDS_TOP_EDGE &&
1640 Pos2->GetTypeOfPosition()==SMDS_TOP_EDGE &&
1641 n1->getshapeId() != n2->getshapeId() )
1644 return getMediumNodeOnComposedWire(n1,n2,force3d);
1646 E = TopoDS::Edge(meshDS->IndexToShape( edgeID = pos.first ));
1648 u[0] = GetNodeU(E,n1,n2, force3d ? 0 : &uvOK[0]);
1649 u[1] = GetNodeU(E,n2,n1, force3d ? 0 : &uvOK[1]);
1651 catch ( Standard_Failure& f )
1653 // issue 22502 / a node is on VERTEX not belonging to E
1654 // issue 22568 / both nodes are on non-connected VERTEXes
1655 return getMediumNodeOnComposedWire(n1,n2,force3d);
1659 if ( !force3d & uvOK[0] && uvOK[1] )
1661 // we try to create medium node using UV parameters of
1662 // nodes, else - medium between corresponding 3d points
1665 //if ( uvOK[0] && uvOK[1] )
1667 if ( IsDegenShape( n1->getshapeId() )) {
1668 if ( myParIndex & U_periodic ) uv[0].SetCoord( 1, uv[1].Coord( 1 ));
1669 else uv[0].SetCoord( 2, uv[1].Coord( 2 ));
1671 else if ( IsDegenShape( n2->getshapeId() )) {
1672 if ( myParIndex & U_periodic ) uv[1].SetCoord( 1, uv[0].Coord( 1 ));
1673 else uv[1].SetCoord( 2, uv[0].Coord( 2 ));
1675 TopLoc_Location loc;
1676 Handle(Geom_Surface) S = BRep_Tool::Surface(F,loc);
1677 gp_XY UV = GetMiddleUV( S, uv[0], uv[1] );
1678 gp_Pnt P = S->Value( UV.X(), UV.Y() ).Transformed(loc);
1679 n12 = meshDS->AddNode(P.X(), P.Y(), P.Z());
1680 // if ( mySetElemOnShape ) node is not elem!
1681 meshDS->SetNodeOnFace(n12, faceID, UV.X(), UV.Y());
1682 myTLinkNodeMap.insert(make_pair(link,n12));
1686 else if ( !E.IsNull() )
1689 Handle(Geom_Curve) C = BRep_Tool::Curve(E, f, l);
1692 Standard_Boolean isPeriodic = C->IsPeriodic();
1695 Standard_Real Period = C->Period();
1696 Standard_Real p = u[1]+ShapeAnalysis::AdjustByPeriod(u[1],u[0],Period);
1697 Standard_Real pmid = (u[0]+p)/2.;
1698 U = pmid+ShapeAnalysis::AdjustToPeriod(pmid,C->FirstParameter(),C->LastParameter());
1703 gp_Pnt P = C->Value( U );
1704 n12 = meshDS->AddNode(P.X(), P.Y(), P.Z());
1705 //if ( mySetElemOnShape ) node is not elem!
1706 meshDS->SetNodeOnEdge(n12, edgeID, U);
1707 myTLinkNodeMap.insert(make_pair(link,n12));
1714 double x = ( n1->X() + n2->X() )/2.;
1715 double y = ( n1->Y() + n2->Y() )/2.;
1716 double z = ( n1->Z() + n2->Z() )/2.;
1717 n12 = meshDS->AddNode(x,y,z);
1719 //if ( mySetElemOnShape ) node is not elem!
1723 gp_XY UV = ( uv[0] + uv[1] ) / 2.;
1724 CheckNodeUV( F, n12, UV, 2 * BRep_Tool::Tolerance( F ), /*force=*/true);
1725 meshDS->SetNodeOnFace(n12, faceID, UV.X(), UV.Y() );
1727 else if ( !E.IsNull() )
1729 double U = ( u[0] + u[1] ) / 2.;
1730 CheckNodeU( E, n12, U, 2 * BRep_Tool::Tolerance( E ), /*force=*/true);
1731 meshDS->SetNodeOnEdge(n12, edgeID, U);
1733 else if ( myShapeID > 0 && mySetElemOnShape )
1735 meshDS->SetMeshElementOnShape(n12, myShapeID);
1739 myTLinkNodeMap.insert( make_pair( link, n12 ));
1743 //================================================================================
1745 * \brief Makes a medium node if nodes reside different edges
1747 //================================================================================
1749 const SMDS_MeshNode* SMESH_MesherHelper::getMediumNodeOnComposedWire(const SMDS_MeshNode* n1,
1750 const SMDS_MeshNode* n2,
1753 SMESH_TNodeXYZ p1( n1 ), p2( n2 );
1754 gp_Pnt middle = 0.5 * p1 + 0.5 * p2;
1755 SMDS_MeshNode* n12 = AddNode( middle.X(), middle.Y(), middle.Z() );
1757 // To find position on edge and 3D position for n12,
1758 // project <middle> to 2 edges and select projection most close to <middle>
1760 TopoDS_Edge bestEdge;
1761 double u = 0, distMiddleProj = Precision::Infinite(), distXYZ[4], f,l;
1763 // get shapes under the nodes
1764 TopoDS_Shape shape[2];
1766 for ( int is2nd = 0; is2nd < 2; ++is2nd )
1768 const SMDS_MeshNode* n = is2nd ? n2 : n1;
1769 TopoDS_Shape S = GetSubShapeByNode( n, GetMeshDS() );
1771 shape[ nbShapes++ ] = S;
1774 vector< TopoDS_Shape > edges;
1775 for ( int iS = 0; iS < nbShapes; ++iS )
1777 switch ( shape[iS].ShapeType() ) {
1780 edges.push_back( shape[iS] );
1786 if ( nbShapes == 2 && iS==0 && shape[1-iS].ShapeType() == TopAbs_VERTEX )
1787 edge = GetCommonAncestor( shape[iS], shape[1-iS], *myMesh, TopAbs_EDGE );
1789 if ( edge.IsNull() )
1791 PShapeIteratorPtr eIt = GetAncestors( shape[iS], *myMesh, TopAbs_EDGE );
1792 while( const TopoDS_Shape* e = eIt->next() )
1793 edges.push_back( *e );
1799 if ( nbShapes == 1 || shape[1-iS].ShapeType() < TopAbs_EDGE )
1800 for ( TopExp_Explorer e( shape[iS], TopAbs_EDGE ); e.More(); e.Next() )
1801 edges.push_back( e.Current() );
1808 // project to get U of projection and distance from middle to projection
1809 for ( size_t iE = 0; iE < edges.size(); ++iE )
1811 const TopoDS_Edge& edge = TopoDS::Edge( edges[ iE ]);
1812 distXYZ[0] = distMiddleProj;
1814 CheckNodeU( edge, n12, testU, 2 * BRep_Tool::Tolerance(edge), /*force=*/true, distXYZ );
1815 if ( distXYZ[0] < distMiddleProj )
1817 distMiddleProj = distXYZ[0];
1823 // // both projections failed; set n12 on the edge of n1 with U of a common vertex
1824 // TopoDS_Vertex vCommon;
1825 // if ( TopExp::CommonVertex( edges[0], edges[1], vCommon ))
1826 // u = BRep_Tool::Parameter( vCommon, edges[0] );
1829 // double f,l, u0 = GetNodeU( edges[0], n1 );
1830 // BRep_Tool::Range( edges[0],f,l );
1831 // u = ( fabs(u0-f) < fabs(u0-l) ) ? f : l;
1834 // distMiddleProj = 0;
1837 if ( !bestEdge.IsNull() )
1839 // move n12 to position of a successfull projection
1840 //double tol = BRep_Tool::Tolerance(edges[ iOkEdge ]);
1841 if ( !force3d /*&& distMiddleProj > 2*tol*/ )
1843 TopLoc_Location loc;
1844 Handle(Geom_Curve) curve = BRep_Tool::Curve( bestEdge,loc,f,l );
1845 gp_Pnt p = curve->Value( u ).Transformed( loc );
1846 GetMeshDS()->MoveNode( n12, p.X(), p.Y(), p.Z() );
1848 //if ( mySetElemOnShape ) node is not elem!
1850 int edgeID = GetMeshDS()->ShapeToIndex( bestEdge );
1851 if ( edgeID != n12->getshapeId() )
1852 GetMeshDS()->UnSetNodeOnShape( n12 );
1853 GetMeshDS()->SetNodeOnEdge(n12, edgeID, u);
1856 myTLinkNodeMap.insert( make_pair( SMESH_TLink(n1,n2), n12 ));
1861 //=======================================================================
1862 //function : AddNode
1863 //purpose : Creates a node
1864 //=======================================================================
1866 SMDS_MeshNode* SMESH_MesherHelper::AddNode(double x, double y, double z, int ID,
1869 SMESHDS_Mesh * meshDS = GetMeshDS();
1870 SMDS_MeshNode* node = 0;
1872 node = meshDS->AddNodeWithID( x, y, z, ID );
1874 node = meshDS->AddNode( x, y, z );
1875 if ( mySetElemOnShape && myShapeID > 0 ) { // node is not elem ?
1876 switch ( myShape.ShapeType() ) {
1877 case TopAbs_SOLID: meshDS->SetNodeInVolume( node, myShapeID); break;
1878 case TopAbs_SHELL: meshDS->SetNodeInVolume( node, myShapeID); break;
1879 case TopAbs_FACE: meshDS->SetNodeOnFace( node, myShapeID, u, v); break;
1880 case TopAbs_EDGE: meshDS->SetNodeOnEdge( node, myShapeID, u); break;
1881 case TopAbs_VERTEX: meshDS->SetNodeOnVertex( node, myShapeID); break;
1888 //=======================================================================
1889 //function : AddEdge
1890 //purpose : Creates quadratic or linear edge
1891 //=======================================================================
1893 SMDS_MeshEdge* SMESH_MesherHelper::AddEdge(const SMDS_MeshNode* n1,
1894 const SMDS_MeshNode* n2,
1898 SMESHDS_Mesh * meshDS = GetMeshDS();
1900 SMDS_MeshEdge* edge = 0;
1901 if (myCreateQuadratic) {
1902 const SMDS_MeshNode* n12 = GetMediumNode(n1,n2,force3d);
1904 edge = meshDS->AddEdgeWithID(n1, n2, n12, id);
1906 edge = meshDS->AddEdge(n1, n2, n12);
1910 edge = meshDS->AddEdgeWithID(n1, n2, id);
1912 edge = meshDS->AddEdge(n1, n2);
1915 if ( mySetElemOnShape && myShapeID > 0 )
1916 meshDS->SetMeshElementOnShape( edge, myShapeID );
1921 //=======================================================================
1922 //function : AddFace
1923 //purpose : Creates quadratic or linear triangle
1924 //=======================================================================
1926 SMDS_MeshFace* SMESH_MesherHelper::AddFace(const SMDS_MeshNode* n1,
1927 const SMDS_MeshNode* n2,
1928 const SMDS_MeshNode* n3,
1932 SMESHDS_Mesh * meshDS = GetMeshDS();
1933 SMDS_MeshFace* elem = 0;
1935 if( n1==n2 || n2==n3 || n3==n1 )
1938 if(!myCreateQuadratic) {
1940 elem = meshDS->AddFaceWithID(n1, n2, n3, id);
1942 elem = meshDS->AddFace(n1, n2, n3);
1945 const SMDS_MeshNode* n12 = GetMediumNode( n1, n2, force3d, TopAbs_FACE );
1946 const SMDS_MeshNode* n23 = GetMediumNode( n2, n3, force3d, TopAbs_FACE );
1947 const SMDS_MeshNode* n31 = GetMediumNode( n3, n1, force3d, TopAbs_FACE );
1948 if(myCreateBiQuadratic)
1950 const SMDS_MeshNode* nCenter = GetCentralNode(n1, n2, n3, n12, n23, n31, force3d);
1952 elem = meshDS->AddFaceWithID(n1, n2, n3, n12, n23, n31, nCenter, id);
1954 elem = meshDS->AddFace(n1, n2, n3, n12, n23, n31, nCenter);
1959 elem = meshDS->AddFaceWithID(n1, n2, n3, n12, n23, n31, id);
1961 elem = meshDS->AddFace(n1, n2, n3, n12, n23, n31);
1964 if ( mySetElemOnShape && myShapeID > 0 )
1965 meshDS->SetMeshElementOnShape( elem, myShapeID );
1970 //=======================================================================
1971 //function : AddFace
1972 //purpose : Creates bi-quadratic, quadratic or linear quadrangle
1973 //=======================================================================
1975 SMDS_MeshFace* SMESH_MesherHelper::AddFace(const SMDS_MeshNode* n1,
1976 const SMDS_MeshNode* n2,
1977 const SMDS_MeshNode* n3,
1978 const SMDS_MeshNode* n4,
1982 SMESHDS_Mesh * meshDS = GetMeshDS();
1983 SMDS_MeshFace* elem = 0;
1986 return AddFace(n1,n3,n4,id,force3d);
1989 return AddFace(n1,n2,n4,id,force3d);
1992 return AddFace(n1,n2,n3,id,force3d);
1995 return AddFace(n1,n2,n4,id,force3d);
1998 return AddFace(n1,n2,n3,id,force3d);
2001 return AddFace(n1,n2,n3,id,force3d);
2004 if(!myCreateQuadratic) {
2006 elem = meshDS->AddFaceWithID(n1, n2, n3, n4, id);
2008 elem = meshDS->AddFace(n1, n2, n3, n4);
2011 const SMDS_MeshNode* n12 = GetMediumNode( n1, n2, force3d, TopAbs_FACE );
2012 const SMDS_MeshNode* n23 = GetMediumNode( n2, n3, force3d, TopAbs_FACE );
2013 const SMDS_MeshNode* n34 = GetMediumNode( n3, n4, force3d, TopAbs_FACE );
2014 const SMDS_MeshNode* n41 = GetMediumNode( n4, n1, force3d, TopAbs_FACE );
2015 if(myCreateBiQuadratic)
2017 const SMDS_MeshNode* nCenter = GetCentralNode(n1, n2, n3, n4, n12, n23, n34, n41, force3d);
2019 elem = meshDS->AddFaceWithID(n1, n2, n3, n4, n12, n23, n34, n41, nCenter, id);
2021 elem = meshDS->AddFace(n1, n2, n3, n4, n12, n23, n34, n41, nCenter);
2026 elem = meshDS->AddFaceWithID(n1, n2, n3, n4, n12, n23, n34, n41, id);
2028 elem = meshDS->AddFace(n1, n2, n3, n4, n12, n23, n34, n41);
2031 if ( mySetElemOnShape && myShapeID > 0 )
2032 meshDS->SetMeshElementOnShape( elem, myShapeID );
2037 //=======================================================================
2038 //function : AddPolygonalFace
2039 //purpose : Creates polygon, with additional nodes in quadratic mesh
2040 //=======================================================================
2042 SMDS_MeshFace* SMESH_MesherHelper::AddPolygonalFace (const vector<const SMDS_MeshNode*>& nodes,
2046 SMESHDS_Mesh * meshDS = GetMeshDS();
2047 SMDS_MeshFace* elem = 0;
2049 if(!myCreateQuadratic)
2052 elem = meshDS->AddPolygonalFaceWithID(nodes, id);
2054 elem = meshDS->AddPolygonalFace(nodes);
2058 vector<const SMDS_MeshNode*> newNodes( nodes.size() * 2 );
2060 for ( int i = 0; i < nodes.size(); ++i )
2062 const SMDS_MeshNode* n1 = nodes[i];
2063 const SMDS_MeshNode* n2 = nodes[(i+1)%nodes.size()];
2064 const SMDS_MeshNode* n12 = GetMediumNode( n1, n2, force3d, TopAbs_FACE );
2065 newNodes.push_back( n12 );
2068 elem = meshDS->AddQuadPolygonalFaceWithID(newNodes, id);
2070 elem = meshDS->AddQuadPolygonalFace(newNodes);
2072 if ( mySetElemOnShape && myShapeID > 0 )
2073 meshDS->SetMeshElementOnShape( elem, myShapeID );
2078 //=======================================================================
2079 //function : AddVolume
2080 //purpose : Creates quadratic or linear prism
2081 //=======================================================================
2083 SMDS_MeshVolume* SMESH_MesherHelper::AddVolume(const SMDS_MeshNode* n1,
2084 const SMDS_MeshNode* n2,
2085 const SMDS_MeshNode* n3,
2086 const SMDS_MeshNode* n4,
2087 const SMDS_MeshNode* n5,
2088 const SMDS_MeshNode* n6,
2092 SMESHDS_Mesh * meshDS = GetMeshDS();
2093 SMDS_MeshVolume* elem = 0;
2094 if(!myCreateQuadratic) {
2096 elem = meshDS->AddVolumeWithID(n1, n2, n3, n4, n5, n6, id);
2098 elem = meshDS->AddVolume(n1, n2, n3, n4, n5, n6);
2101 const SMDS_MeshNode* n12 = GetMediumNode( n1, n2, force3d, TopAbs_SOLID );
2102 const SMDS_MeshNode* n23 = GetMediumNode( n2, n3, force3d, TopAbs_SOLID );
2103 const SMDS_MeshNode* n31 = GetMediumNode( n3, n1, force3d, TopAbs_SOLID );
2105 const SMDS_MeshNode* n45 = GetMediumNode( n4, n5, force3d, TopAbs_SOLID );
2106 const SMDS_MeshNode* n56 = GetMediumNode( n5, n6, force3d, TopAbs_SOLID );
2107 const SMDS_MeshNode* n64 = GetMediumNode( n6, n4, force3d, TopAbs_SOLID );
2109 const SMDS_MeshNode* n14 = GetMediumNode( n1, n4, force3d, TopAbs_SOLID );
2110 const SMDS_MeshNode* n25 = GetMediumNode( n2, n5, force3d, TopAbs_SOLID );
2111 const SMDS_MeshNode* n36 = GetMediumNode( n3, n6, force3d, TopAbs_SOLID );
2114 elem = meshDS->AddVolumeWithID(n1, n2, n3, n4, n5, n6,
2115 n12, n23, n31, n45, n56, n64, n14, n25, n36, id);
2117 elem = meshDS->AddVolume(n1, n2, n3, n4, n5, n6,
2118 n12, n23, n31, n45, n56, n64, n14, n25, n36);
2120 if ( mySetElemOnShape && myShapeID > 0 )
2121 meshDS->SetMeshElementOnShape( elem, myShapeID );
2126 //=======================================================================
2127 //function : AddVolume
2128 //purpose : Creates quadratic or linear tetrahedron
2129 //=======================================================================
2131 SMDS_MeshVolume* SMESH_MesherHelper::AddVolume(const SMDS_MeshNode* n1,
2132 const SMDS_MeshNode* n2,
2133 const SMDS_MeshNode* n3,
2134 const SMDS_MeshNode* n4,
2138 SMESHDS_Mesh * meshDS = GetMeshDS();
2139 SMDS_MeshVolume* elem = 0;
2140 if(!myCreateQuadratic) {
2142 elem = meshDS->AddVolumeWithID(n1, n2, n3, n4, id);
2144 elem = meshDS->AddVolume(n1, n2, n3, n4);
2147 const SMDS_MeshNode* n12 = GetMediumNode( n1, n2, force3d, TopAbs_SOLID );
2148 const SMDS_MeshNode* n23 = GetMediumNode( n2, n3, force3d, TopAbs_SOLID );
2149 const SMDS_MeshNode* n31 = GetMediumNode( n3, n1, force3d, TopAbs_SOLID );
2151 const SMDS_MeshNode* n14 = GetMediumNode( n1, n4, force3d, TopAbs_SOLID );
2152 const SMDS_MeshNode* n24 = GetMediumNode( n2, n4, force3d, TopAbs_SOLID );
2153 const SMDS_MeshNode* n34 = GetMediumNode( n3, n4, force3d, TopAbs_SOLID );
2156 elem = meshDS->AddVolumeWithID(n1, n2, n3, n4, n12, n23, n31, n14, n24, n34, id);
2158 elem = meshDS->AddVolume(n1, n2, n3, n4, n12, n23, n31, n14, n24, n34);
2160 if ( mySetElemOnShape && myShapeID > 0 )
2161 meshDS->SetMeshElementOnShape( elem, myShapeID );
2166 //=======================================================================
2167 //function : AddVolume
2168 //purpose : Creates quadratic or linear pyramid
2169 //=======================================================================
2171 SMDS_MeshVolume* SMESH_MesherHelper::AddVolume(const SMDS_MeshNode* n1,
2172 const SMDS_MeshNode* n2,
2173 const SMDS_MeshNode* n3,
2174 const SMDS_MeshNode* n4,
2175 const SMDS_MeshNode* n5,
2179 SMDS_MeshVolume* elem = 0;
2180 if(!myCreateQuadratic) {
2182 elem = GetMeshDS()->AddVolumeWithID(n1, n2, n3, n4, n5, id);
2184 elem = GetMeshDS()->AddVolume(n1, n2, n3, n4, n5);
2187 const SMDS_MeshNode* n12 = GetMediumNode( n1, n2, force3d, TopAbs_SOLID );
2188 const SMDS_MeshNode* n23 = GetMediumNode( n2, n3, force3d, TopAbs_SOLID );
2189 const SMDS_MeshNode* n34 = GetMediumNode( n3, n4, force3d, TopAbs_SOLID );
2190 const SMDS_MeshNode* n41 = GetMediumNode( n4, n1, force3d, TopAbs_SOLID );
2192 const SMDS_MeshNode* n15 = GetMediumNode( n1, n5, force3d, TopAbs_SOLID );
2193 const SMDS_MeshNode* n25 = GetMediumNode( n2, n5, force3d, TopAbs_SOLID );
2194 const SMDS_MeshNode* n35 = GetMediumNode( n3, n5, force3d, TopAbs_SOLID );
2195 const SMDS_MeshNode* n45 = GetMediumNode( n4, n5, force3d, TopAbs_SOLID );
2198 elem = GetMeshDS()->AddVolumeWithID ( n1, n2, n3, n4, n5,
2203 elem = GetMeshDS()->AddVolume( n1, n2, n3, n4, n5,
2205 n15, n25, n35, n45);
2207 if ( mySetElemOnShape && myShapeID > 0 )
2208 GetMeshDS()->SetMeshElementOnShape( elem, myShapeID );
2213 //=======================================================================
2214 //function : AddVolume
2215 //purpose : Creates tri-quadratic, quadratic or linear hexahedron
2216 //=======================================================================
2218 SMDS_MeshVolume* SMESH_MesherHelper::AddVolume(const SMDS_MeshNode* n1,
2219 const SMDS_MeshNode* n2,
2220 const SMDS_MeshNode* n3,
2221 const SMDS_MeshNode* n4,
2222 const SMDS_MeshNode* n5,
2223 const SMDS_MeshNode* n6,
2224 const SMDS_MeshNode* n7,
2225 const SMDS_MeshNode* n8,
2229 SMESHDS_Mesh * meshDS = GetMeshDS();
2230 SMDS_MeshVolume* elem = 0;
2231 if(!myCreateQuadratic) {
2233 elem = meshDS->AddVolumeWithID(n1, n2, n3, n4, n5, n6, n7, n8, id);
2235 elem = meshDS->AddVolume(n1, n2, n3, n4, n5, n6, n7, n8);
2238 const SMDS_MeshNode* n12 = GetMediumNode( n1, n2, force3d, TopAbs_SOLID );
2239 const SMDS_MeshNode* n23 = GetMediumNode( n2, n3, force3d, TopAbs_SOLID );
2240 const SMDS_MeshNode* n34 = GetMediumNode( n3, n4, force3d, TopAbs_SOLID );
2241 const SMDS_MeshNode* n41 = GetMediumNode( n4, n1, force3d, TopAbs_SOLID );
2243 const SMDS_MeshNode* n56 = GetMediumNode( n5, n6, force3d, TopAbs_SOLID );
2244 const SMDS_MeshNode* n67 = GetMediumNode( n6, n7, force3d, TopAbs_SOLID );
2245 const SMDS_MeshNode* n78 = GetMediumNode( n7, n8, force3d, TopAbs_SOLID );
2246 const SMDS_MeshNode* n85 = GetMediumNode( n8, n5, force3d, TopAbs_SOLID );
2248 const SMDS_MeshNode* n15 = GetMediumNode( n1, n5, force3d, TopAbs_SOLID );
2249 const SMDS_MeshNode* n26 = GetMediumNode( n2, n6, force3d, TopAbs_SOLID );
2250 const SMDS_MeshNode* n37 = GetMediumNode( n3, n7, force3d, TopAbs_SOLID );
2251 const SMDS_MeshNode* n48 = GetMediumNode( n4, n8, force3d, TopAbs_SOLID );
2252 if ( myCreateBiQuadratic )
2254 const SMDS_MeshNode* n1234 = GetCentralNode( n1,n2,n3,n4,n12,n23,n34,n41,force3d );
2255 const SMDS_MeshNode* n1256 = GetCentralNode( n1,n2,n5,n6,n12,n26,n56,n15,force3d );
2256 const SMDS_MeshNode* n2367 = GetCentralNode( n2,n3,n6,n7,n23,n37,n67,n26,force3d );
2257 const SMDS_MeshNode* n3478 = GetCentralNode( n3,n4,n7,n8,n34,n48,n78,n37,force3d );
2258 const SMDS_MeshNode* n1458 = GetCentralNode( n1,n4,n5,n8,n41,n48,n15,n85,force3d );
2259 const SMDS_MeshNode* n5678 = GetCentralNode( n5,n6,n7,n8,n56,n67,n78,n85,force3d );
2261 vector<gp_XYZ> pointsOnShapes( SMESH_Block::ID_Shell );
2263 pointsOnShapes[ SMESH_Block::ID_V000 ] = SMESH_TNodeXYZ( n4 );
2264 pointsOnShapes[ SMESH_Block::ID_V100 ] = SMESH_TNodeXYZ( n8 );
2265 pointsOnShapes[ SMESH_Block::ID_V010 ] = SMESH_TNodeXYZ( n3 );
2266 pointsOnShapes[ SMESH_Block::ID_V110 ] = SMESH_TNodeXYZ( n7 );
2267 pointsOnShapes[ SMESH_Block::ID_V001 ] = SMESH_TNodeXYZ( n1 );
2268 pointsOnShapes[ SMESH_Block::ID_V101 ] = SMESH_TNodeXYZ( n5 );
2269 pointsOnShapes[ SMESH_Block::ID_V011 ] = SMESH_TNodeXYZ( n2 );
2270 pointsOnShapes[ SMESH_Block::ID_V111 ] = SMESH_TNodeXYZ( n6 );
2272 pointsOnShapes[ SMESH_Block::ID_Ex00 ] = SMESH_TNodeXYZ( n48 );
2273 pointsOnShapes[ SMESH_Block::ID_Ex10 ] = SMESH_TNodeXYZ( n37 );
2274 pointsOnShapes[ SMESH_Block::ID_E0y0 ] = SMESH_TNodeXYZ( n15 );
2275 pointsOnShapes[ SMESH_Block::ID_E1y0 ] = SMESH_TNodeXYZ( n26 );
2276 pointsOnShapes[ SMESH_Block::ID_Ex01 ] = SMESH_TNodeXYZ( n34 );
2277 pointsOnShapes[ SMESH_Block::ID_Ex11 ] = SMESH_TNodeXYZ( n78 );
2278 pointsOnShapes[ SMESH_Block::ID_E0y1 ] = SMESH_TNodeXYZ( n12 );
2279 pointsOnShapes[ SMESH_Block::ID_E1y1 ] = SMESH_TNodeXYZ( n56 );
2280 pointsOnShapes[ SMESH_Block::ID_E00z ] = SMESH_TNodeXYZ( n41 );
2281 pointsOnShapes[ SMESH_Block::ID_E10z ] = SMESH_TNodeXYZ( n85 );
2282 pointsOnShapes[ SMESH_Block::ID_E01z ] = SMESH_TNodeXYZ( n23 );
2283 pointsOnShapes[ SMESH_Block::ID_E11z ] = SMESH_TNodeXYZ( n67 );
2285 pointsOnShapes[ SMESH_Block::ID_Fxy0 ] = SMESH_TNodeXYZ( n3478 );
2286 pointsOnShapes[ SMESH_Block::ID_Fxy1 ] = SMESH_TNodeXYZ( n1256 );
2287 pointsOnShapes[ SMESH_Block::ID_Fx0z ] = SMESH_TNodeXYZ( n1458 );
2288 pointsOnShapes[ SMESH_Block::ID_Fx1z ] = SMESH_TNodeXYZ( n2367 );
2289 pointsOnShapes[ SMESH_Block::ID_F0yz ] = SMESH_TNodeXYZ( n1234 );
2290 pointsOnShapes[ SMESH_Block::ID_F1yz ] = SMESH_TNodeXYZ( n5678 );
2292 gp_XYZ centerCube(0.5, 0.5, 0.5);
2294 SMESH_Block::ShellPoint( centerCube, pointsOnShapes, nCenterElem );
2295 const SMDS_MeshNode* nCenter =
2296 meshDS->AddNode( nCenterElem.X(), nCenterElem.Y(), nCenterElem.Z() );
2297 meshDS->SetNodeInVolume( nCenter, myShapeID );
2300 elem = meshDS->AddVolumeWithID(n1, n2, n3, n4, n5, n6, n7, n8,
2301 n12, n23, n34, n41, n56, n67,
2302 n78, n85, n15, n26, n37, n48,
2303 n1234, n1256, n2367, n3478, n1458, n5678, nCenter, id);
2305 elem = meshDS->AddVolume(n1, n2, n3, n4, n5, n6, n7, n8,
2306 n12, n23, n34, n41, n56, n67,
2307 n78, n85, n15, n26, n37, n48,
2308 n1234, n1256, n2367, n3478, n1458, n5678, nCenter);
2313 elem = meshDS->AddVolumeWithID(n1, n2, n3, n4, n5, n6, n7, n8,
2314 n12, n23, n34, n41, n56, n67,
2315 n78, n85, n15, n26, n37, n48, id);
2317 elem = meshDS->AddVolume(n1, n2, n3, n4, n5, n6, n7, n8,
2318 n12, n23, n34, n41, n56, n67,
2319 n78, n85, n15, n26, n37, n48);
2322 if ( mySetElemOnShape && myShapeID > 0 )
2323 meshDS->SetMeshElementOnShape( elem, myShapeID );
2328 //=======================================================================
2329 //function : AddVolume
2330 //purpose : Creates LINEAR!!!!!!!!! octahedron
2331 //=======================================================================
2333 SMDS_MeshVolume* SMESH_MesherHelper::AddVolume(const SMDS_MeshNode* n1,
2334 const SMDS_MeshNode* n2,
2335 const SMDS_MeshNode* n3,
2336 const SMDS_MeshNode* n4,
2337 const SMDS_MeshNode* n5,
2338 const SMDS_MeshNode* n6,
2339 const SMDS_MeshNode* n7,
2340 const SMDS_MeshNode* n8,
2341 const SMDS_MeshNode* n9,
2342 const SMDS_MeshNode* n10,
2343 const SMDS_MeshNode* n11,
2344 const SMDS_MeshNode* n12,
2348 SMESHDS_Mesh * meshDS = GetMeshDS();
2349 SMDS_MeshVolume* elem = 0;
2351 elem = meshDS->AddVolumeWithID(n1,n2,n3,n4,n5,n6,n7,n8,n9,n10,n11,n12,id);
2353 elem = meshDS->AddVolume(n1,n2,n3,n4,n5,n6,n7,n8,n9,n10,n11,n12);
2354 if ( mySetElemOnShape && myShapeID > 0 )
2355 meshDS->SetMeshElementOnShape( elem, myShapeID );
2359 //=======================================================================
2360 //function : AddPolyhedralVolume
2361 //purpose : Creates polyhedron. In quadratic mesh, adds medium nodes
2362 //=======================================================================
2365 SMESH_MesherHelper::AddPolyhedralVolume (const std::vector<const SMDS_MeshNode*>& nodes,
2366 const std::vector<int>& quantities,
2370 SMESHDS_Mesh * meshDS = GetMeshDS();
2371 SMDS_MeshVolume* elem = 0;
2372 if(!myCreateQuadratic)
2375 elem = meshDS->AddPolyhedralVolumeWithID(nodes, quantities, id);
2377 elem = meshDS->AddPolyhedralVolume(nodes, quantities);
2381 vector<const SMDS_MeshNode*> newNodes;
2382 vector<int> newQuantities;
2383 for ( int iFace=0, iN=0; iFace < quantities.size(); ++iFace)
2385 int nbNodesInFace = quantities[iFace];
2386 newQuantities.push_back(0);
2387 for ( int i = 0; i < nbNodesInFace; ++i )
2389 const SMDS_MeshNode* n1 = nodes[ iN + i ];
2390 newNodes.push_back( n1 );
2391 newQuantities.back()++;
2393 const SMDS_MeshNode* n2 = nodes[ iN + ( i+1==nbNodesInFace ? 0 : i+1 )];
2394 // if ( n1->GetPosition()->GetTypeOfPosition() != SMDS_TOP_3DSPACE &&
2395 // n2->GetPosition()->GetTypeOfPosition() != SMDS_TOP_3DSPACE )
2397 const SMDS_MeshNode* n12 = GetMediumNode( n1, n2, force3d, TopAbs_SOLID );
2398 newNodes.push_back( n12 );
2399 newQuantities.back()++;
2402 iN += nbNodesInFace;
2405 elem = meshDS->AddPolyhedralVolumeWithID( newNodes, newQuantities, id );
2407 elem = meshDS->AddPolyhedralVolume( newNodes, newQuantities );
2409 if ( mySetElemOnShape && myShapeID > 0 )
2410 meshDS->SetMeshElementOnShape( elem, myShapeID );
2417 //================================================================================
2419 * \brief Check if a node belongs to any face of sub-mesh
2421 //================================================================================
2423 bool isNodeInSubMesh( const SMDS_MeshNode* n, const SMESHDS_SubMesh* sm )
2425 SMDS_ElemIteratorPtr fIt = n->GetInverseElementIterator( SMDSAbs_Face );
2426 while ( fIt->more() )
2427 if ( sm->Contains( fIt->next() ))
2433 //=======================================================================
2434 //function : IsSameElemGeometry
2435 //purpose : Returns true if all elements of a sub-mesh are of same shape
2436 //=======================================================================
2438 bool SMESH_MesherHelper::IsSameElemGeometry(const SMESHDS_SubMesh* smDS,
2439 SMDSAbs_GeometryType shape,
2440 const bool nullSubMeshRes)
2442 if ( !smDS ) return nullSubMeshRes;
2444 SMDS_ElemIteratorPtr elemIt = smDS->GetElements();
2445 while ( elemIt->more() ) {
2446 const SMDS_MeshElement* e = elemIt->next();
2447 if ( e->GetGeomType() != shape )
2453 //=======================================================================
2454 //function : LoadNodeColumns
2455 //purpose : Load nodes bound to face into a map of node columns
2456 //=======================================================================
2458 bool SMESH_MesherHelper::LoadNodeColumns(TParam2ColumnMap & theParam2ColumnMap,
2459 const TopoDS_Face& theFace,
2460 const TopoDS_Edge& theBaseEdge,
2461 SMESHDS_Mesh* theMesh,
2462 SMESH_ProxyMesh* theProxyMesh)
2464 return LoadNodeColumns(theParam2ColumnMap,
2466 std::list<TopoDS_Edge>(1,theBaseEdge),
2471 //=======================================================================
2472 //function : LoadNodeColumns
2473 //purpose : Load nodes bound to face into a map of node columns
2474 //=======================================================================
2476 bool SMESH_MesherHelper::LoadNodeColumns(TParam2ColumnMap & theParam2ColumnMap,
2477 const TopoDS_Face& theFace,
2478 const std::list<TopoDS_Edge>& theBaseSide,
2479 SMESHDS_Mesh* theMesh,
2480 SMESH_ProxyMesh* theProxyMesh)
2482 // get a right sub-mesh of theFace
2484 const SMESHDS_SubMesh* faceSubMesh = 0;
2487 faceSubMesh = theProxyMesh->GetSubMesh( theFace );
2488 if ( !faceSubMesh ||
2489 faceSubMesh->NbElements() == 0 ||
2490 theProxyMesh->IsTemporary( faceSubMesh->GetElements()->next() ))
2492 // can use a proxy sub-mesh with not temporary elements only
2498 faceSubMesh = theMesh->MeshElements( theFace );
2499 if ( !faceSubMesh || faceSubMesh->NbElements() == 0 )
2502 if ( theParam2ColumnMap.empty() )
2504 // get data of edges for normalization of params
2505 vector< double > length;
2507 list<TopoDS_Edge>::const_iterator edge;
2509 for ( edge = theBaseSide.begin(); edge != theBaseSide.end(); ++edge )
2511 double len = std::max( 1e-10, SMESH_Algo::EdgeLength( *edge ));
2513 length.push_back( len );
2517 // get nodes on theBaseEdge sorted by param on edge and initialize theParam2ColumnMap with them
2518 edge = theBaseSide.begin();
2519 for ( int iE = 0; edge != theBaseSide.end(); ++edge, ++iE )
2521 map< double, const SMDS_MeshNode*> sortedBaseNN;
2522 SMESH_Algo::GetSortedNodesOnEdge( theMesh, *edge,/*noMedium=*/true, sortedBaseNN );
2524 map< double, const SMDS_MeshNode*>::iterator u_n;
2525 // pb with mesh_Projection_2D_00/A1 fixed by adding expectedSupport arg to GetMediumPos()
2526 // so the following solution is commented (hope forever :)
2528 // SMESH_Algo::GetSortedNodesOnEdge( theMesh, *edge,/*noMedium=*/true, sortedBaseNN,
2529 // // SMDSAbs_Edge here is needed to be coherent with
2530 // // StdMeshers_FaceSide used by Quadrangle to get nodes
2531 // // on EDGE; else pb in mesh_Projection_2D_00/A1 where a
2532 // // medium node on EDGE is medium in a triangle but not
2535 // if ( faceSubMesh->GetElements()->next()->IsQuadratic() )
2536 // // filter off nodes medium in faces on theFace (same pb with mesh_Projection_2D_00/A1)
2537 // for ( u_n = sortedBaseNN.begin(); u_n != sortedBaseNN.end() ; )
2539 // const SMDS_MeshNode* node = u_n->second;
2540 // SMDS_ElemIteratorPtr faceIt = node->GetInverseElementIterator( SMDSAbs_Face );
2541 // if ( faceIt->more() && node ) {
2542 // const SMDS_MeshElement* face = faceIt->next();
2543 // if ( faceSubMesh->Contains( face ) && face->IsMediumNode( node ))
2547 // sortedBaseNN.erase( u_n++ );
2551 if ( sortedBaseNN.empty() ) continue;
2553 u_n = sortedBaseNN.begin();
2554 if ( theProxyMesh ) // from sortedBaseNN remove nodes not shared by faces of faceSubMesh
2556 const SMDS_MeshNode* n1 = (++sortedBaseNN.begin())->second;
2557 const SMDS_MeshNode* n2 = (++sortedBaseNN.rbegin())->second;
2558 bool allNodesAreProxy = ( n1 != theProxyMesh->GetProxyNode( n1 ) &&
2559 n2 != theProxyMesh->GetProxyNode( n2 ));
2560 if ( allNodesAreProxy )
2561 for ( u_n = sortedBaseNN.begin(); u_n != sortedBaseNN.end(); u_n++ )
2562 u_n->second = theProxyMesh->GetProxyNode( u_n->second );
2564 if ( u_n = sortedBaseNN.begin(), !isNodeInSubMesh( u_n->second, faceSubMesh ))
2566 while ( ++u_n != sortedBaseNN.end() && !isNodeInSubMesh( u_n->second, faceSubMesh ));
2567 sortedBaseNN.erase( sortedBaseNN.begin(), u_n );
2569 if ( !sortedBaseNN.empty() )
2570 if ( u_n = --sortedBaseNN.end(), !isNodeInSubMesh( u_n->second, faceSubMesh ))
2572 while ( u_n != sortedBaseNN.begin() && !isNodeInSubMesh( (--u_n)->second, faceSubMesh ));
2573 sortedBaseNN.erase( ++u_n, sortedBaseNN.end() );
2575 if ( sortedBaseNN.empty() ) continue;
2579 BRep_Tool::Range( *edge, f, l );
2580 if ( edge->Orientation() == TopAbs_REVERSED ) std::swap( f, l );
2581 const double coeff = 1. / ( l - f ) * length[iE] / fullLen;
2582 const double prevPar = theParam2ColumnMap.empty() ? 0 : theParam2ColumnMap.rbegin()->first;
2583 for ( u_n = sortedBaseNN.begin(); u_n != sortedBaseNN.end(); u_n++ )
2585 double par = prevPar + coeff * ( u_n->first - f );
2586 TParam2ColumnMap::iterator u2nn =
2587 theParam2ColumnMap.insert( theParam2ColumnMap.end(), make_pair( par, TNodeColumn()));
2588 u2nn->second.push_back( u_n->second );
2591 if ( theParam2ColumnMap.size() < 2 )
2596 int prevNbRows = theParam2ColumnMap.begin()->second.size(); // current, at least 1 here
2597 int expectedNbRows = faceSubMesh->NbElements() / ( theParam2ColumnMap.size()-1 ); // to be added
2599 // fill theParam2ColumnMap column by column by passing from nodes on
2600 // theBaseEdge up via mesh faces on theFace
2602 TParam2ColumnMap::iterator par_nVec_1, par_nVec_2;
2603 par_nVec_2 = theParam2ColumnMap.begin();
2604 par_nVec_1 = par_nVec_2++;
2605 TIDSortedElemSet emptySet, avoidSet;
2606 for ( ; par_nVec_2 != theParam2ColumnMap.end(); ++par_nVec_1, ++par_nVec_2 )
2608 vector<const SMDS_MeshNode*>& nCol1 = par_nVec_1->second;
2609 vector<const SMDS_MeshNode*>& nCol2 = par_nVec_2->second;
2610 nCol1.resize( prevNbRows + expectedNbRows );
2611 nCol2.resize( prevNbRows + expectedNbRows );
2613 int i1, i2, foundNbRows = 0;
2614 const SMDS_MeshNode *n1 = nCol1[ prevNbRows-1 ];
2615 const SMDS_MeshNode *n2 = nCol2[ prevNbRows-1 ];
2616 // find face sharing node n1 and n2 and belonging to faceSubMesh
2617 while ( const SMDS_MeshElement* face =
2618 SMESH_MeshAlgos::FindFaceInSet( n1, n2, emptySet, avoidSet, &i1, &i2))
2620 if ( faceSubMesh->Contains( face ))
2622 int nbNodes = face->NbCornerNodes();
2625 if ( foundNbRows + 1 > expectedNbRows )
2627 n1 = face->GetNode( (i2+2) % 4 ); // opposite corner of quadrangle face
2628 n2 = face->GetNode( (i1+2) % 4 );
2629 nCol1[ prevNbRows + foundNbRows] = n1;
2630 nCol2[ prevNbRows + foundNbRows] = n2;
2633 avoidSet.insert( face );
2635 if ( foundNbRows != expectedNbRows )
2639 return ( theParam2ColumnMap.size() > 1 &&
2640 theParam2ColumnMap.begin()->second.size() == prevNbRows + expectedNbRows );
2645 //================================================================================
2647 * \brief Return true if a node is at a corner of a 2D structured mesh of FACE
2649 //================================================================================
2651 bool isCornerOfStructure( const SMDS_MeshNode* n,
2652 const SMESHDS_SubMesh* faceSM,
2653 SMESH_MesherHelper& faceAnalyser )
2655 int nbFacesInSM = 0;
2657 SMDS_ElemIteratorPtr fIt = n->GetInverseElementIterator( SMDSAbs_Face );
2658 while ( fIt->more() )
2659 nbFacesInSM += faceSM->Contains( fIt->next() );
2661 if ( nbFacesInSM == 1 )
2664 if ( nbFacesInSM == 2 && n->GetPosition()->GetTypeOfPosition() == SMDS_TOP_VERTEX )
2666 return faceAnalyser.IsRealSeam( n->getshapeId() );
2672 //=======================================================================
2673 //function : IsStructured
2674 //purpose : Return true if 2D mesh on FACE is a structured rectangle
2675 //=======================================================================
2677 bool SMESH_MesherHelper::IsStructured( SMESH_subMesh* faceSM )
2679 SMESHDS_SubMesh* fSM = faceSM->GetSubMeshDS();
2680 if ( !fSM || fSM->NbElements() == 0 )
2683 list< TopoDS_Edge > edges;
2684 list< int > nbEdgesInWires;
2685 int nbWires = SMESH_Block::GetOrderedEdges( TopoDS::Face( faceSM->GetSubShape() ),
2686 edges, nbEdgesInWires );
2687 if ( nbWires != 1 /*|| nbEdgesInWires.front() != 4*/ ) // allow composite sides
2690 // algo: find corners of a structure and then analyze nb of faces and
2691 // length of structure sides
2693 SMESHDS_Mesh* meshDS = faceSM->GetFather()->GetMeshDS();
2694 SMESH_MesherHelper faceAnalyser( *faceSM->GetFather() );
2695 faceAnalyser.SetSubShape( faceSM->GetSubShape() );
2697 // rotate edges to get the first node being at corner
2698 // (in principle it's not necessary because so far none SALOME algo can make
2699 // such a structured mesh that all corner nodes are not on VERTEXes)
2700 bool isCorner = false;
2701 int nbRemainEdges = nbEdgesInWires.front();
2703 TopoDS_Vertex V = IthVertex( 0, edges.front() );
2704 isCorner = isCornerOfStructure( SMESH_Algo::VertexNode( V, meshDS ),
2707 edges.splice( edges.end(), edges, edges.begin() );
2711 while ( !isCorner && nbRemainEdges > 0 );
2716 // get all nodes from EDGEs
2717 list< const SMDS_MeshNode* > nodes;
2718 list< TopoDS_Edge >::iterator edge = edges.begin();
2719 for ( ; edge != edges.end(); ++edge )
2721 map< double, const SMDS_MeshNode* > u2Nodes;
2722 if ( !SMESH_Algo::GetSortedNodesOnEdge( meshDS, *edge,
2723 /*skipMedium=*/true, u2Nodes ))
2726 list< const SMDS_MeshNode* > edgeNodes;
2727 map< double, const SMDS_MeshNode* >::iterator u2n = u2Nodes.begin();
2728 for ( ; u2n != u2Nodes.end(); ++u2n )
2729 edgeNodes.push_back( u2n->second );
2730 if ( edge->Orientation() == TopAbs_REVERSED )
2731 edgeNodes.reverse();
2733 if ( !nodes.empty() && nodes.back() == edgeNodes.front() )
2734 edgeNodes.pop_front();
2735 nodes.splice( nodes.end(), edgeNodes, edgeNodes.begin(), edgeNodes.end() );
2738 // get length of structured sides
2739 vector<int> nbEdgesInSide;
2741 list< const SMDS_MeshNode* >::iterator n = ++nodes.begin();
2742 for ( ; n != nodes.end(); ++n )
2745 if ( isCornerOfStructure( *n, fSM, faceAnalyser )) {
2746 nbEdgesInSide.push_back( nbEdges );
2752 if ( nbEdgesInSide.size() != 4 )
2754 if ( nbEdgesInSide[0] != nbEdgesInSide[2] )
2756 if ( nbEdgesInSide[1] != nbEdgesInSide[3] )
2758 if ( nbEdgesInSide[0] * nbEdgesInSide[1] != fSM->NbElements() )
2764 //=======================================================================
2765 //function : IsDistorted2D
2766 //purpose : Return true if 2D mesh on FACE is ditorted
2767 //=======================================================================
2769 bool SMESH_MesherHelper::IsDistorted2D( SMESH_subMesh* faceSM,
2772 if ( !faceSM || faceSM->GetSubShape().ShapeType() != TopAbs_FACE )
2775 bool haveBadFaces = false;
2777 SMESH_MesherHelper helper( *faceSM->GetFather() );
2778 helper.SetSubShape( faceSM->GetSubShape() );
2780 const TopoDS_Face& F = TopoDS::Face( faceSM->GetSubShape() );
2781 SMESHDS_SubMesh* smDS = helper.GetMeshDS()->MeshElements( F );
2782 if ( !smDS || smDS->NbElements() == 0 ) return false;
2784 SMDS_ElemIteratorPtr faceIt = smDS->GetElements();
2785 double prevArea = 0;
2786 vector< const SMDS_MeshNode* > nodes;
2788 bool* toCheckUV = checkUV ? & checkUV : 0;
2789 while ( faceIt->more() && !haveBadFaces )
2791 const SMDS_MeshElement* face = faceIt->next();
2794 nodes.resize( face->NbCornerNodes() );
2795 SMDS_MeshElement::iterator n = face->begin_nodes();
2796 for ( size_t i = 0; i < nodes.size(); ++n, ++i )
2799 // avoid elems on degenarate shapes as UV on them can be wrong
2800 if ( helper.HasDegeneratedEdges() )
2802 bool isOnDegen = false;
2803 for ( size_t i = 0; ( i < nodes.size() && !isOnDegen ); ++i )
2804 isOnDegen = helper.IsDegenShape( nodes[ i ]->getshapeId() );
2808 // prepare to getting UVs
2809 const SMDS_MeshNode* inFaceNode = 0;
2810 if ( helper.HasSeam() ) {
2811 for ( size_t i = 0; ( i < nodes.size() && !inFaceNode ); ++i )
2812 if ( !helper.IsSeamShape( nodes[ i ]->getshapeId() ))
2813 inFaceNode = nodes[ i ];
2818 uv.resize( nodes.size() );
2819 for ( size_t i = 0; i < nodes.size(); ++i )
2820 uv[ i ] = helper.GetNodeUV( F, nodes[ i ], inFaceNode, toCheckUV );
2822 // compare orientation of triangles
2823 double faceArea = 0;
2824 for ( int iT = 0, nbT = nodes.size()-2; iT < nbT; ++iT )
2826 gp_XY v1 = uv[ iT+1 ] - uv[ 0 ];
2827 gp_XY v2 = uv[ iT+2 ] - uv[ 0 ];
2828 faceArea += v2 ^ v1;
2830 haveBadFaces = ( faceArea * prevArea < 0 );
2831 prevArea = faceArea;
2834 return haveBadFaces;
2837 //================================================================================
2839 * \brief Find out elements orientation on a geometrical face
2840 * \param theFace - The face correctly oriented in the shape being meshed
2841 * \retval bool - true if the face normal and the normal of first element
2842 * in the correspoding submesh point in different directions
2844 //================================================================================
2846 bool SMESH_MesherHelper::IsReversedSubMesh (const TopoDS_Face& theFace)
2848 if ( theFace.IsNull() )
2851 // find out orientation of a meshed face
2852 int faceID = GetMeshDS()->ShapeToIndex( theFace );
2853 TopoDS_Shape aMeshedFace = GetMeshDS()->IndexToShape( faceID );
2854 bool isReversed = ( theFace.Orientation() != aMeshedFace.Orientation() );
2856 const SMESHDS_SubMesh * aSubMeshDSFace = GetMeshDS()->MeshElements( faceID );
2857 if ( !aSubMeshDSFace )
2860 // find an element on a bounday of theFace
2861 SMDS_ElemIteratorPtr iteratorElem = aSubMeshDSFace->GetElements();
2862 const SMDS_MeshNode* nn[2];
2863 while ( iteratorElem->more() ) // loop on elements on theFace
2865 const SMDS_MeshElement* elem = iteratorElem->next();
2866 if ( ! elem ) continue;
2868 // look for 2 nodes on EDGE
2869 int nbNodes = elem->NbCornerNodes();
2870 nn[0] = elem->GetNode( nbNodes-1 );
2871 for ( int iN = 0; iN < nbNodes; ++iN )
2873 nn[1] = elem->GetNode( iN );
2874 if ( nn[0]->GetPosition()->GetDim() < 2 &&
2875 nn[1]->GetPosition()->GetDim() < 2 )
2877 TopoDS_Shape s0 = GetSubShapeByNode( nn[0], GetMeshDS() );
2878 TopoDS_Shape s1 = GetSubShapeByNode( nn[1], GetMeshDS() );
2879 TopoDS_Shape E = GetCommonAncestor( s0, s1, *myMesh, TopAbs_EDGE );
2880 if ( !E.IsNull() && !s0.IsSame( s1 ))
2884 for ( TopExp_Explorer exp( theFace, TopAbs_EDGE ); exp.More(); exp.Next() )
2885 if ( E.IsSame( exp.Current() )) {
2887 E = exp.Current(); // to know orientation
2892 double u0 = GetNodeU( TopoDS::Edge( E ), nn[0], nn[1], &ok );
2893 double u1 = GetNodeU( TopoDS::Edge( E ), nn[1], nn[0], &ok );
2896 isReversed = ( u0 > u1 );
2897 if ( E.Orientation() == TopAbs_REVERSED )
2898 isReversed = !isReversed;
2908 // find an element with a good normal
2910 bool normalOK = false;
2912 iteratorElem = aSubMeshDSFace->GetElements();
2913 while ( !normalOK && iteratorElem->more() ) // loop on elements on theFace
2915 const SMDS_MeshElement* elem = iteratorElem->next();
2916 if ( ! SMESH_MeshAlgos::FaceNormal( elem, const_cast<gp_XYZ&>( Ne.XYZ() ), /*normalized=*/0 ))
2920 // get UV of a node inside theFACE
2921 SMDS_ElemIteratorPtr nodesIt = elem->nodesIterator();
2922 const SMDS_MeshNode* nInFace = 0;
2923 int iPosDim = SMDS_TOP_VERTEX;
2924 while ( nodesIt->more() ) // loop on nodes
2926 const SMDS_MeshNode* n = static_cast<const SMDS_MeshNode*>( nodesIt->next() );
2927 if ( n->GetPosition()->GetTypeOfPosition() >= iPosDim )
2930 iPosDim = n->GetPosition()->GetTypeOfPosition();
2933 uv = GetNodeUV( theFace, nInFace, 0, &normalOK );
2938 // face normal at node position
2939 TopLoc_Location loc;
2940 Handle(Geom_Surface) surf = BRep_Tool::Surface( theFace, loc );
2941 // if ( surf.IsNull() || surf->Continuity() < GeomAbs_C1 )
2942 // some surfaces not detected as GeomAbs_C1 are nevertheless correct for meshing
2943 if ( surf.IsNull() || surf->Continuity() < GeomAbs_C0 )
2946 gp_Vec d1u, d1v; gp_Pnt p;
2947 surf->D1( uv.X(), uv.Y(), p, d1u, d1v );
2948 gp_Vec Nf = (d1u ^ d1v).Transformed( loc );
2950 if ( theFace.Orientation() == TopAbs_REVERSED )
2953 return Ne * Nf < 0.;
2956 //=======================================================================
2958 //purpose : Count nb of sub-shapes
2959 //=======================================================================
2961 int SMESH_MesherHelper::Count(const TopoDS_Shape& shape,
2962 const TopAbs_ShapeEnum type,
2963 const bool ignoreSame)
2966 TopTools_IndexedMapOfShape map;
2967 TopExp::MapShapes( shape, type, map );
2968 return map.Extent();
2972 for ( TopExp_Explorer exp( shape, type ); exp.More(); exp.Next() )
2978 //=======================================================================
2979 //function : NbAncestors
2980 //purpose : Return number of unique ancestors of the shape
2981 //=======================================================================
2983 int SMESH_MesherHelper::NbAncestors(const TopoDS_Shape& shape,
2984 const SMESH_Mesh& mesh,
2985 TopAbs_ShapeEnum ancestorType/*=TopAbs_SHAPE*/)
2987 TopTools_MapOfShape ancestors;
2988 TopTools_ListIteratorOfListOfShape ansIt( mesh.GetAncestors(shape) );
2989 for ( ; ansIt.More(); ansIt.Next() ) {
2990 if ( ancestorType == TopAbs_SHAPE || ansIt.Value().ShapeType() == ancestorType )
2991 ancestors.Add( ansIt.Value() );
2993 return ancestors.Extent();
2996 //=======================================================================
2997 //function : GetSubShapeOri
2998 //purpose : Return orientation of sub-shape in the main shape
2999 //=======================================================================
3001 TopAbs_Orientation SMESH_MesherHelper::GetSubShapeOri(const TopoDS_Shape& shape,
3002 const TopoDS_Shape& subShape)
3004 TopAbs_Orientation ori = TopAbs_Orientation(-1);
3005 if ( !shape.IsNull() && !subShape.IsNull() )
3007 TopExp_Explorer e( shape, subShape.ShapeType() );
3008 if ( shape.Orientation() >= TopAbs_INTERNAL ) // TopAbs_INTERNAL or TopAbs_EXTERNAL
3009 e.Init( shape.Oriented(TopAbs_FORWARD), subShape.ShapeType() );
3010 for ( ; e.More(); e.Next())
3011 if ( subShape.IsSame( e.Current() ))
3014 ori = e.Current().Orientation();
3019 //=======================================================================
3020 //function : IsSubShape
3022 //=======================================================================
3024 bool SMESH_MesherHelper::IsSubShape( const TopoDS_Shape& shape,
3025 const TopoDS_Shape& mainShape )
3027 if ( !shape.IsNull() && !mainShape.IsNull() )
3029 for ( TopExp_Explorer exp( mainShape, shape.ShapeType());
3032 if ( shape.IsSame( exp.Current() ))
3035 SCRUTE((shape.IsNull()));
3036 SCRUTE((mainShape.IsNull()));
3040 //=======================================================================
3041 //function : IsSubShape
3043 //=======================================================================
3045 bool SMESH_MesherHelper::IsSubShape( const TopoDS_Shape& shape, SMESH_Mesh* aMesh )
3047 if ( shape.IsNull() || !aMesh )
3050 aMesh->GetMeshDS()->ShapeToIndex( shape ) ||
3052 (shape.ShapeType() == TopAbs_COMPOUND && aMesh->GetMeshDS()->IsGroupOfSubShapes( shape ));
3055 //=======================================================================
3056 //function : IsBlock
3058 //=======================================================================
3060 bool SMESH_MesherHelper::IsBlock( const TopoDS_Shape& shape )
3062 if ( shape.IsNull() )
3066 TopExp_Explorer exp( shape, TopAbs_SHELL );
3067 if ( !exp.More() ) return false;
3068 shell = TopoDS::Shell( exp.Current() );
3069 if ( exp.Next(), exp.More() ) return false;
3072 TopTools_IndexedMapOfOrientedShape map;
3073 return SMESH_Block::FindBlockShapes( shell, v, v, map );
3077 //================================================================================
3079 * \brief Return maximal tolerance of shape
3081 //================================================================================
3083 double SMESH_MesherHelper::MaxTolerance( const TopoDS_Shape& shape )
3085 double tol = Precision::Confusion();
3086 TopExp_Explorer exp;
3087 for ( exp.Init( shape, TopAbs_FACE ); exp.More(); exp.Next() )
3088 tol = Max( tol, BRep_Tool::Tolerance( TopoDS::Face( exp.Current())));
3089 for ( exp.Init( shape, TopAbs_EDGE ); exp.More(); exp.Next() )
3090 tol = Max( tol, BRep_Tool::Tolerance( TopoDS::Edge( exp.Current())));
3091 for ( exp.Init( shape, TopAbs_VERTEX ); exp.More(); exp.Next() )
3092 tol = Max( tol, BRep_Tool::Tolerance( TopoDS::Vertex( exp.Current())));
3097 //================================================================================
3099 * \brief Return MaxTolerance( face ), probably cached
3101 //================================================================================
3103 double SMESH_MesherHelper::getFaceMaxTol( const TopoDS_Shape& face ) const
3105 int faceID = GetMeshDS()->ShapeToIndex( face );
3107 SMESH_MesherHelper* me = const_cast< SMESH_MesherHelper* >( this );
3108 double & tol = me->myFaceMaxTol.insert( make_pair( faceID, -1. )).first->second;
3110 tol = MaxTolerance( face );
3115 //================================================================================
3117 * \brief Return an angle between two EDGEs sharing a common VERTEX with reference
3118 * of the FACE normal
3119 * \return double - the angle (between -Pi and Pi), negative if the angle is concave,
3120 * 1e100 in case of failure
3121 * \waring Care about order of the EDGEs and their orientation to be as they are
3122 * within the FACE! Don't pass degenerated EDGEs neither!
3124 //================================================================================
3126 double SMESH_MesherHelper::GetAngle( const TopoDS_Edge & theE1,
3127 const TopoDS_Edge & theE2,
3128 const TopoDS_Face & theFace,
3129 const TopoDS_Vertex & theCommonV,
3130 gp_Vec* theFaceNormal)
3132 double angle = 1e100;
3136 Handle(Geom_Curve) c1 = BRep_Tool::Curve( theE1, f,l );
3137 Handle(Geom_Curve) c2 = BRep_Tool::Curve( theE2, f,l );
3138 Handle(Geom2d_Curve) c2d1 = BRep_Tool::CurveOnSurface( theE1, theFace, f,l );
3139 Handle(Geom_Surface) surf = BRep_Tool::Surface( theFace );
3140 double p1 = BRep_Tool::Parameter( theCommonV, theE1 );
3141 double p2 = BRep_Tool::Parameter( theCommonV, theE2 );
3142 if ( c1.IsNull() || c2.IsNull() )
3144 gp_XY uv = c2d1->Value( p1 ).XY();
3145 gp_Vec du, dv; gp_Pnt p;
3146 surf->D1( uv.X(), uv.Y(), p, du, dv );
3147 gp_Vec vec1, vec2, vecRef = du ^ dv;
3150 while ( vecRef.SquareMagnitude() < 1e-25 )
3152 double dp = ( l - f ) / 1000.;
3153 p1tmp += dp * (( Abs( p1 - f ) > Abs( p1 - l )) ? -1. : +1.);
3154 uv = c2d1->Value( p1tmp ).XY();
3155 surf->D1( uv.X(), uv.Y(), p, du, dv );
3157 if ( ++nbLoops > 10 )
3160 cout << "SMESH_MesherHelper::GetAngle(): Captured in a sigularity" << endl;
3165 if ( theFace.Orientation() == TopAbs_REVERSED )
3167 if ( theFaceNormal ) *theFaceNormal = vecRef;
3169 c1->D1( p1, p, vec1 );
3170 c2->D1( p2, p, vec2 );
3171 // TopoDS_Face F = theFace;
3172 // if ( F.Orientation() == TopAbs_INTERNAL )
3173 // F.Orientation( TopAbs_FORWARD );
3174 if ( theE1.Orientation() /*GetSubShapeOri( F, theE1 )*/ == TopAbs_REVERSED )
3176 if ( theE2.Orientation() /*GetSubShapeOri( F, theE2 )*/ == TopAbs_REVERSED )
3178 angle = vec1.AngleWithRef( vec2, vecRef );
3180 if ( Abs ( angle ) >= 0.99 * M_PI )
3182 BRep_Tool::Range( theE1, f, l );
3183 p1 += 1e-7 * ( p1-f < l-p1 ? +1. : -1. );
3184 c1->D1( p1, p, vec1 );
3185 if ( theE1.Orientation() == TopAbs_REVERSED )
3187 BRep_Tool::Range( theE2, f, l );
3188 p2 += 1e-7 * ( p2-f < l-p2 ? +1. : -1. );
3189 c2->D1( p2, p, vec2 );
3190 if ( theE2.Orientation() == TopAbs_REVERSED )
3192 angle = vec1.AngleWithRef( vec2, vecRef );
3201 //================================================================================
3203 * \brief Check if the first and last vertices of an edge are the same
3204 * \param anEdge - the edge to check
3205 * \retval bool - true if same
3207 //================================================================================
3209 bool SMESH_MesherHelper::IsClosedEdge( const TopoDS_Edge& anEdge )
3211 if ( anEdge.Orientation() >= TopAbs_INTERNAL )
3212 return IsClosedEdge( TopoDS::Edge( anEdge.Oriented( TopAbs_FORWARD )));
3213 return TopExp::FirstVertex( anEdge ).IsSame( TopExp::LastVertex( anEdge ));
3216 //================================================================================
3218 * \brief Wrapper over TopExp::FirstVertex() and TopExp::LastVertex() fixing them
3219 * in the case of INTERNAL edge
3221 //================================================================================
3223 TopoDS_Vertex SMESH_MesherHelper::IthVertex( const bool is2nd,
3227 if ( anEdge.Orientation() >= TopAbs_INTERNAL )
3228 anEdge.Orientation( TopAbs_FORWARD );
3230 const TopAbs_Orientation tgtOri = is2nd ? TopAbs_REVERSED : TopAbs_FORWARD;
3231 TopoDS_Iterator vIt( anEdge, CumOri );
3232 while ( vIt.More() && vIt.Value().Orientation() != tgtOri )
3235 return ( vIt.More() ? TopoDS::Vertex(vIt.Value()) : TopoDS_Vertex() );
3238 //================================================================================
3240 * \brief Return type of shape contained in a group
3241 * \param group - a shape of type TopAbs_COMPOUND
3242 * \param avoidCompound - not to return TopAbs_COMPOUND
3244 //================================================================================
3246 TopAbs_ShapeEnum SMESH_MesherHelper::GetGroupType(const TopoDS_Shape& group,
3247 const bool avoidCompound)
3249 if ( !group.IsNull() )
3251 if ( group.ShapeType() != TopAbs_COMPOUND )
3252 return group.ShapeType();
3254 // iterate on a compound
3255 TopoDS_Iterator it( group );
3257 return avoidCompound ? GetGroupType( it.Value() ) : it.Value().ShapeType();
3259 return TopAbs_SHAPE;
3262 //================================================================================
3264 * \brief Returns a shape, to which a hypothesis used to mesh a given shape is assigned
3265 * \param [in] hyp - the hypothesis
3266 * \param [in] shape - the shape, for meshing which the \a hyp is used
3267 * \param [in] mesh - the mesh
3268 * \return TopoDS_Shape - the shape the \a hyp is assigned to
3270 //================================================================================
3272 TopoDS_Shape SMESH_MesherHelper::GetShapeOfHypothesis( const SMESHDS_Hypothesis * hyp,
3273 const TopoDS_Shape& shape,
3276 const SMESH_Hypothesis* h = static_cast<const SMESH_Hypothesis*>( hyp );
3277 SMESH_HypoFilter hypFilter( SMESH_HypoFilter::Is( h ));
3279 TopoDS_Shape shapeOfHyp;
3280 mesh->GetHypothesis( shape, hypFilter, /*checkAncestors=*/true, &shapeOfHyp );
3284 //=======================================================================
3285 //function : IsQuadraticMesh
3286 //purpose : Check mesh without geometry for: if all elements on this shape are quadratic,
3287 // quadratic elements will be created.
3288 // Used then generated 3D mesh without geometry.
3289 //=======================================================================
3291 SMESH_MesherHelper:: MType SMESH_MesherHelper::IsQuadraticMesh()
3293 int NbAllEdgsAndFaces=0;
3294 int NbQuadFacesAndEdgs=0;
3295 int NbFacesAndEdges=0;
3296 //All faces and edges
3297 NbAllEdgsAndFaces = myMesh->NbEdges() + myMesh->NbFaces();
3298 if ( NbAllEdgsAndFaces == 0 )
3299 return SMESH_MesherHelper::LINEAR;
3301 //Quadratic faces and edges
3302 NbQuadFacesAndEdgs = myMesh->NbEdges(ORDER_QUADRATIC) + myMesh->NbFaces(ORDER_QUADRATIC);
3304 //Linear faces and edges
3305 NbFacesAndEdges = myMesh->NbEdges(ORDER_LINEAR) + myMesh->NbFaces(ORDER_LINEAR);
3307 if (NbAllEdgsAndFaces == NbQuadFacesAndEdgs) {
3309 return SMESH_MesherHelper::QUADRATIC;
3311 else if (NbAllEdgsAndFaces == NbFacesAndEdges) {
3313 return SMESH_MesherHelper::LINEAR;
3316 //Mesh with both type of elements
3317 return SMESH_MesherHelper::COMP;
3320 //=======================================================================
3321 //function : GetOtherParam
3322 //purpose : Return an alternative parameter for a node on seam
3323 //=======================================================================
3325 double SMESH_MesherHelper::GetOtherParam(const double param) const
3327 int i = myParIndex & U_periodic ? 0 : 1;
3328 return fabs(param-myPar1[i]) < fabs(param-myPar2[i]) ? myPar2[i] : myPar1[i];
3333 //=======================================================================
3335 * \brief Iterator on ancestors of the given type
3337 //=======================================================================
3339 struct TAncestorsIterator : public SMDS_Iterator<const TopoDS_Shape*>
3341 TopTools_ListIteratorOfListOfShape _ancIter;
3342 TopAbs_ShapeEnum _type;
3343 TopTools_MapOfShape _encountered;
3344 TAncestorsIterator( const TopTools_ListOfShape& ancestors, TopAbs_ShapeEnum type)
3345 : _ancIter( ancestors ), _type( type )
3347 if ( _ancIter.More() ) {
3348 if ( _ancIter.Value().ShapeType() != _type ) next();
3349 else _encountered.Add( _ancIter.Value() );
3354 return _ancIter.More();
3356 virtual const TopoDS_Shape* next()
3358 const TopoDS_Shape* s = _ancIter.More() ? & _ancIter.Value() : 0;
3359 if ( _ancIter.More() )
3360 for ( _ancIter.Next(); _ancIter.More(); _ancIter.Next())
3361 if ( _ancIter.Value().ShapeType() == _type && _encountered.Add( _ancIter.Value() ))
3369 //=======================================================================
3371 * \brief Return iterator on ancestors of the given type
3373 //=======================================================================
3375 PShapeIteratorPtr SMESH_MesherHelper::GetAncestors(const TopoDS_Shape& shape,
3376 const SMESH_Mesh& mesh,
3377 TopAbs_ShapeEnum ancestorType)
3379 return PShapeIteratorPtr( new TAncestorsIterator( mesh.GetAncestors(shape), ancestorType));
3382 //=======================================================================
3383 //function : GetCommonAncestor
3384 //purpose : Find a common ancestors of two shapes of the given type
3385 //=======================================================================
3387 TopoDS_Shape SMESH_MesherHelper::GetCommonAncestor(const TopoDS_Shape& shape1,
3388 const TopoDS_Shape& shape2,
3389 const SMESH_Mesh& mesh,
3390 TopAbs_ShapeEnum ancestorType)
3392 TopoDS_Shape commonAnc;
3393 if ( !shape1.IsNull() && !shape2.IsNull() )
3395 if ( shape1.ShapeType() == ancestorType && IsSubShape( shape2, shape1 ))
3397 if ( shape2.ShapeType() == ancestorType && IsSubShape( shape1, shape2 ))
3400 PShapeIteratorPtr ancIt = GetAncestors( shape1, mesh, ancestorType );
3401 while ( const TopoDS_Shape* anc = ancIt->next() )
3402 if ( IsSubShape( shape2, *anc ))
3411 //#include <Perf_Meter.hxx>
3413 //=======================================================================
3414 namespace { // Structures used by FixQuadraticElements()
3415 //=======================================================================
3417 #define __DMP__(txt) \
3419 #define MSG(txt) __DMP__(txt<<endl)
3420 #define MSGBEG(txt) __DMP__(txt)
3422 //const double straightTol2 = 1e-33; // to detect straing links
3423 bool isStraightLink(double linkLen2, double middleNodeMove2)
3425 // straight if <node move> < 1/15 * <link length>
3426 return middleNodeMove2 < 1/15./15. * linkLen2;
3430 // ---------------------------------------
3432 * \brief Quadratic link knowing its faces
3434 struct QLink: public SMESH_TLink
3436 const SMDS_MeshNode* _mediumNode;
3437 mutable vector<const QFace* > _faces;
3438 mutable gp_Vec _nodeMove;
3439 mutable int _nbMoves;
3440 mutable bool _is2dFixed; // is moved along surface or in 3D
3442 QLink(const SMDS_MeshNode* n1, const SMDS_MeshNode* n2, const SMDS_MeshNode* nm):
3443 SMESH_TLink( n1,n2 ), _mediumNode(nm), _nodeMove(0,0,0), _nbMoves(0) {
3445 _nodeMove = MediumPnt() - MiddlePnt();
3446 _is2dFixed = ( MediumPos() != SMDS_TOP_FACE );
3448 void SetContinuesFaces() const;
3449 const QFace* GetContinuesFace( const QFace* face ) const;
3450 bool OnBoundary() const;
3451 gp_XYZ MiddlePnt() const { return ( XYZ( node1() ) + XYZ( node2() )) / 2.; }
3452 gp_XYZ MediumPnt() const { return XYZ( _mediumNode ); }
3454 SMDS_TypeOfPosition MediumPos() const
3455 { return _mediumNode->GetPosition()->GetTypeOfPosition(); }
3456 SMDS_TypeOfPosition EndPos(bool isSecond) const
3457 { return (isSecond ? node2() : node1())->GetPosition()->GetTypeOfPosition(); }
3458 const SMDS_MeshNode* EndPosNode(SMDS_TypeOfPosition pos) const
3459 { return EndPos(0) == pos ? node1() : EndPos(1) == pos ? node2() : 0; }
3461 void Move(const gp_Vec& move, bool sum=false, bool is2dFixed=false) const
3462 { _nodeMove += move; _nbMoves += sum ? (_nbMoves==0) : 1; _is2dFixed |= is2dFixed; }
3463 gp_XYZ Move() const { return _nodeMove.XYZ() / _nbMoves; }
3464 bool IsMoved() const { return (_nbMoves > 0 /*&& !IsStraight()*/); }
3465 bool IsFixedOnSurface() const { return _is2dFixed; }
3466 bool IsStraight() const
3467 { return isStraightLink( (XYZ(node1())-XYZ(node2())).SquareModulus(),
3468 _nodeMove.SquareMagnitude());
3470 bool operator<(const QLink& other) const {
3471 return (node1()->GetID() == other.node1()->GetID() ?
3472 node2()->GetID() < other.node2()->GetID() :
3473 node1()->GetID() < other.node1()->GetID());
3475 // struct PtrComparator {
3476 // bool operator() (const QLink* l1, const QLink* l2 ) const { return *l1 < *l2; }
3479 // ---------------------------------------------------------
3481 * \brief Link in the chain of links; it connects two faces
3485 const QLink* _qlink;
3486 mutable const QFace* _qfaces[2];
3488 TChainLink(const QLink* qlink=0):_qlink(qlink) {
3489 _qfaces[0] = _qfaces[1] = 0;
3491 void SetFace(const QFace* face) const { int iF = _qfaces[0] ? 1 : 0; _qfaces[iF]=face; }
3493 bool IsBoundary() const { return !_qfaces[1]; }
3495 void RemoveFace( const QFace* face ) const
3496 { _qfaces[(face == _qfaces[1])] = 0; if (!_qfaces[0]) std::swap(_qfaces[0],_qfaces[1]); }
3498 const QFace* NextFace( const QFace* f ) const
3499 { return _qfaces[0]==f ? _qfaces[1] : _qfaces[0]; }
3501 const SMDS_MeshNode* NextNode( const SMDS_MeshNode* n ) const
3502 { return n == _qlink->node1() ? _qlink->node2() : _qlink->node1(); }
3504 bool operator<(const TChainLink& other) const { return *_qlink < *other._qlink; }
3506 operator bool() const { return (_qlink); }
3508 const QLink* operator->() const { return _qlink; }
3510 gp_Vec Normal() const;
3512 bool IsStraight() const;
3514 // --------------------------------------------------------------------
3515 typedef list< TChainLink > TChain;
3516 typedef set < TChainLink > TLinkSet;
3517 typedef TLinkSet::const_iterator TLinkInSet;
3519 const int theFirstStep = 5;
3521 enum { ERR_OK, ERR_TRI, ERR_PRISM, ERR_UNKNOWN }; // errors of QFace::GetLinkChain()
3522 // --------------------------------------------------------------------
3524 * \brief Quadratic face shared by two volumes and bound by QLinks
3526 struct QFace: public TIDSortedNodeSet
3528 mutable const SMDS_MeshElement* _volumes[2];
3529 mutable vector< const QLink* > _sides;
3530 mutable bool _sideIsAdded[4]; // added in chain of links
3533 mutable const SMDS_MeshElement* _face;
3536 QFace( const vector< const QLink*>& links, const SMDS_MeshElement* face=0 );
3538 void SetVolume(const SMDS_MeshElement* v) const { _volumes[ _volumes[0] ? 1 : 0 ] = v; }
3540 int NbVolumes() const { return !_volumes[0] ? 0 : !_volumes[1] ? 1 : 2; }
3542 void AddSelfToLinks() const {
3543 for ( int i = 0; i < _sides.size(); ++i )
3544 _sides[i]->_faces.push_back( this );
3546 int LinkIndex( const QLink* side ) const {
3547 for (int i=0; i<_sides.size(); ++i ) if ( _sides[i] == side ) return i;
3550 bool GetLinkChain( int iSide, TChain& chain, SMDS_TypeOfPosition pos, int& err) const;
3552 bool GetLinkChain( TChainLink& link, TChain& chain, SMDS_TypeOfPosition pos, int& err) const
3554 int i = LinkIndex( link._qlink );
3555 if ( i < 0 ) return true;
3556 _sideIsAdded[i] = true;
3557 link.SetFace( this );
3558 // continue from opposite link
3559 return GetLinkChain( (i+2)%_sides.size(), chain, pos, err );
3561 bool IsBoundary() const { return !_volumes[1]; }
3563 bool Contains( const SMDS_MeshNode* node ) const { return count(node); }
3565 bool IsSpoiled(const QLink* bentLink ) const;
3567 TLinkInSet GetBoundaryLink( const TLinkSet& links,
3568 const TChainLink& avoidLink,
3569 TLinkInSet * notBoundaryLink = 0,
3570 const SMDS_MeshNode* nodeToContain = 0,
3571 bool * isAdjacentUsed = 0,
3572 int nbRecursionsLeft = -1) const;
3574 TLinkInSet GetLinkByNode( const TLinkSet& links,
3575 const TChainLink& avoidLink,
3576 const SMDS_MeshNode* nodeToContain) const;
3578 const SMDS_MeshNode* GetNodeInFace() const {
3579 for ( int iL = 0; iL < _sides.size(); ++iL )
3580 if ( _sides[iL]->MediumPos() == SMDS_TOP_FACE ) return _sides[iL]->_mediumNode;
3584 gp_Vec LinkNorm(const int i, SMESH_MesherHelper* theFaceHelper=0) const;
3586 double MoveByBoundary( const TChainLink& theLink,
3587 const gp_Vec& theRefVec,
3588 const TLinkSet& theLinks,
3589 SMESH_MesherHelper* theFaceHelper=0,
3590 const double thePrevLen=0,
3591 const int theStep=theFirstStep,
3592 gp_Vec* theLinkNorm=0,
3593 double theSign=1.0) const;
3596 //================================================================================
3598 * \brief Dump QLink and QFace
3600 ostream& operator << (ostream& out, const QLink& l)
3602 out <<"QLink nodes: "
3603 << l.node1()->GetID() << " - "
3604 << l._mediumNode->GetID() << " - "
3605 << l.node2()->GetID() << endl;
3608 ostream& operator << (ostream& out, const QFace& f)
3610 out <<"QFace nodes: "/*<< &f << " "*/;
3611 for ( TIDSortedNodeSet::const_iterator n = f.begin(); n != f.end(); ++n )
3612 out << (*n)->GetID() << " ";
3613 out << " \tvolumes: "
3614 << (f._volumes[0] ? f._volumes[0]->GetID() : 0) << " "
3615 << (f._volumes[1] ? f._volumes[1]->GetID() : 0);
3616 out << " \tNormal: "<< f._normal.X() <<", "<<f._normal.Y() <<", "<<f._normal.Z() << endl;
3620 //================================================================================
3622 * \brief Construct QFace from QLinks
3624 //================================================================================
3626 QFace::QFace( const vector< const QLink*>& links, const SMDS_MeshElement* face )
3628 _volumes[0] = _volumes[1] = 0;
3630 _sideIsAdded[0]=_sideIsAdded[1]=_sideIsAdded[2]=_sideIsAdded[3]=false;
3631 _normal.SetCoord(0,0,0);
3632 for ( int i = 1; i < _sides.size(); ++i ) {
3633 const QLink *l1 = _sides[i-1], *l2 = _sides[i];
3634 insert( l1->node1() ); insert( l1->node2() );
3636 gp_Vec v1( XYZ( l1->node2()), XYZ( l1->node1()));
3637 gp_Vec v2( XYZ( l2->node1()), XYZ( l2->node2()));
3638 if ( l1->node1() != l2->node1() && l1->node2() != l2->node2() )
3642 double normSqSize = _normal.SquareMagnitude();
3643 if ( normSqSize > numeric_limits<double>::min() )
3644 _normal /= sqrt( normSqSize );
3646 _normal.SetCoord(1e-33,0,0);
3652 //================================================================================
3654 * \brief Make up a chain of links
3655 * \param iSide - link to add first
3656 * \param chain - chain to fill in
3657 * \param pos - postion of medium nodes the links should have
3658 * \param error - out, specifies what is wrong
3659 * \retval bool - false if valid chain can't be built; "valid" means that links
3660 * of the chain belongs to rectangles bounding hexahedrons
3662 //================================================================================
3664 bool QFace::GetLinkChain( int iSide, TChain& chain, SMDS_TypeOfPosition pos, int& error) const
3666 if ( iSide >= _sides.size() ) // wrong argument iSide
3668 if ( _sideIsAdded[ iSide ]) // already in chain
3671 if ( _sides.size() != 4 ) { // triangle - visit all my continous faces
3674 list< const QFace* > faces( 1, this );
3675 while ( !faces.empty() ) {
3676 const QFace* face = faces.front();
3677 for ( int i = 0; i < face->_sides.size(); ++i ) {
3678 if ( !face->_sideIsAdded[i] && face->_sides[i] ) {
3679 face->_sideIsAdded[i] = true;
3680 // find a face side in the chain
3681 TLinkInSet chLink = links.insert( TChainLink(face->_sides[i])).first;
3682 // TChain::iterator chLink = chain.begin();
3683 // for ( ; chLink != chain.end(); ++chLink )
3684 // if ( chLink->_qlink == face->_sides[i] )
3686 // if ( chLink == chain.end() )
3687 // chLink = chain.insert( chain.begin(), TChainLink(face->_sides[i]));
3688 // add a face to a chained link and put a continues face in the queue
3689 chLink->SetFace( face );
3690 if ( face->_sides[i]->MediumPos() == pos )
3691 if ( const QFace* contFace = face->_sides[i]->GetContinuesFace( face ))
3692 if ( contFace->_sides.size() == 3 )
3693 faces.push_back( contFace );
3698 if ( error < ERR_TRI )
3700 chain.insert( chain.end(), links.begin(),links.end() );
3703 _sideIsAdded[iSide] = true; // not to add this link to chain again
3704 const QLink* link = _sides[iSide];
3708 // add link into chain
3709 TChain::iterator chLink = chain.insert( chain.begin(), TChainLink(link));
3710 chLink->SetFace( this );
3713 // propagate from a quadrangle to neighbour faces
3714 if ( link->MediumPos() >= pos ) {
3715 int nbLinkFaces = link->_faces.size();
3716 if ( nbLinkFaces == 4 || (/*nbLinkFaces < 4 && */link->OnBoundary())) {
3717 // hexahedral mesh or boundary quadrangles - goto a continous face
3718 if ( const QFace* f = link->GetContinuesFace( this ))
3719 if ( f->_sides.size() == 4 )
3720 return f->GetLinkChain( *chLink, chain, pos, error );
3723 TChainLink chLink(link); // side face of prismatic mesh - visit all faces of iSide
3724 for ( int i = 0; i < nbLinkFaces; ++i )
3725 if ( link->_faces[i] )
3726 link->_faces[i]->GetLinkChain( chLink, chain, pos, error );
3727 if ( error < ERR_PRISM )
3735 //================================================================================
3737 * \brief Return a boundary link of the triangle face
3738 * \param links - set of all links
3739 * \param avoidLink - link not to return
3740 * \param notBoundaryLink - out, neither the returned link nor avoidLink
3741 * \param nodeToContain - node the returned link must contain; if provided, search
3742 * also performed on adjacent faces
3743 * \param isAdjacentUsed - returns true if link is found in adjacent faces
3744 * \param nbRecursionsLeft - to limit recursion
3746 //================================================================================
3748 TLinkInSet QFace::GetBoundaryLink( const TLinkSet& links,
3749 const TChainLink& avoidLink,
3750 TLinkInSet * notBoundaryLink,
3751 const SMDS_MeshNode* nodeToContain,
3752 bool * isAdjacentUsed,
3753 int nbRecursionsLeft) const
3755 TLinkInSet linksEnd = links.end(), boundaryLink = linksEnd;
3757 typedef list< pair< const QFace*, TLinkInSet > > TFaceLinkList;
3758 TFaceLinkList adjacentFaces;
3760 for ( int iL = 0; iL < _sides.size(); ++iL )
3762 if ( avoidLink._qlink == _sides[iL] )
3764 TLinkInSet link = links.find( _sides[iL] );
3765 if ( link == linksEnd ) continue;
3766 if ( (*link)->MediumPos() > SMDS_TOP_FACE )
3767 continue; // We work on faces here, don't go inside a solid
3770 if ( link->IsBoundary() ) {
3771 if ( !nodeToContain ||
3772 (*link)->node1() == nodeToContain ||
3773 (*link)->node2() == nodeToContain )
3775 boundaryLink = link;
3776 if ( !notBoundaryLink ) break;
3779 else if ( notBoundaryLink ) {
3780 *notBoundaryLink = link;
3781 if ( boundaryLink != linksEnd ) break;
3784 if ( boundaryLink == linksEnd && nodeToContain ) // collect adjacent faces
3785 if ( const QFace* adj = link->NextFace( this ))
3786 if ( adj->Contains( nodeToContain ))
3787 adjacentFaces.push_back( make_pair( adj, link ));
3790 if ( isAdjacentUsed ) *isAdjacentUsed = false;
3791 if ( boundaryLink == linksEnd && nodeToContain && nbRecursionsLeft) // check adjacent faces
3793 if ( nbRecursionsLeft < 0 )
3794 nbRecursionsLeft = nodeToContain->NbInverseElements();
3795 TFaceLinkList::iterator adj = adjacentFaces.begin();
3796 for ( ; boundaryLink == linksEnd && adj != adjacentFaces.end(); ++adj )
3797 boundaryLink = adj->first->GetBoundaryLink( links, *(adj->second), 0, nodeToContain,
3798 isAdjacentUsed, nbRecursionsLeft-1);
3799 if ( isAdjacentUsed ) *isAdjacentUsed = true;
3801 return boundaryLink;
3803 //================================================================================
3805 * \brief Return a link ending at the given node but not avoidLink
3807 //================================================================================
3809 TLinkInSet QFace::GetLinkByNode( const TLinkSet& links,
3810 const TChainLink& avoidLink,
3811 const SMDS_MeshNode* nodeToContain) const
3813 for ( int i = 0; i < _sides.size(); ++i )
3814 if ( avoidLink._qlink != _sides[i] &&
3815 (_sides[i]->node1() == nodeToContain || _sides[i]->node2() == nodeToContain ))
3816 return links.find( _sides[ i ]);
3820 //================================================================================
3822 * \brief Return normal to the i-th side pointing outside the face
3824 //================================================================================
3826 gp_Vec QFace::LinkNorm(const int i, SMESH_MesherHelper* /*uvHelper*/) const
3828 gp_Vec norm = _normal ^ gp_Vec( XYZ(_sides[i]->node1()), XYZ(_sides[i]->node2()));
3829 gp_XYZ pIn = ( _sides[ (i+1)%3 ]->MiddlePnt() +
3830 _sides[ (i+2)%3 ]->MiddlePnt() ) / 2.;
3831 gp_Vec vecOut = ( _sides[i]->MiddlePnt() - pIn );
3833 if ( norm * vecOut < 0 )
3835 double mag2 = norm.SquareMagnitude();
3836 if ( mag2 > numeric_limits<double>::min() )
3837 norm /= sqrt( mag2 );
3840 //================================================================================
3842 * \brief Move medium node of theLink according to its distance from boundary
3843 * \param theLink - link to fix
3844 * \param theRefVec - movement of boundary
3845 * \param theLinks - all adjacent links of continous triangles
3846 * \param theFaceHelper - helper is not used so far
3847 * \param thePrevLen - distance from the boundary
3848 * \param theStep - number of steps till movement propagation limit
3849 * \param theLinkNorm - out normal to theLink
3850 * \param theSign - 1 or -1 depending on movement of boundary
3851 * \retval double - distance from boundary to propagation limit or other boundary
3853 //================================================================================
3855 double QFace::MoveByBoundary( const TChainLink& theLink,
3856 const gp_Vec& theRefVec,
3857 const TLinkSet& theLinks,
3858 SMESH_MesherHelper* theFaceHelper,
3859 const double thePrevLen,
3861 gp_Vec* theLinkNorm,
3862 double theSign) const
3865 return thePrevLen; // propagation limit reached
3867 int iL; // index of theLink
3868 for ( iL = 0; iL < _sides.size(); ++iL )
3869 if ( theLink._qlink == _sides[ iL ])
3872 MSG(string(theStep,'.')<<" Ref( "<<theRefVec.X()<<","<<theRefVec.Y()<<","<<theRefVec.Z()<<" )"
3873 <<" thePrevLen " << thePrevLen);
3874 MSG(string(theStep,'.')<<" "<<*theLink._qlink);
3876 gp_Vec linkNorm = -LinkNorm( iL/*, theFaceHelper*/ ); // normal to theLink
3877 double refProj = theRefVec * linkNorm; // project movement vector to normal of theLink
3878 if ( theStep == theFirstStep )
3879 theSign = refProj < 0. ? -1. : 1.;
3880 else if ( theSign * refProj < 0.4 * theRefVec.Magnitude())
3881 return thePrevLen; // to propagate movement forward only, not in side dir or backward
3883 int iL1 = (iL + 1) % 3, iL2 = (iL + 2) % 3; // indices of the two other links of triangle
3884 TLinkInSet link1 = theLinks.find( _sides[iL1] );
3885 TLinkInSet link2 = theLinks.find( _sides[iL2] );
3887 const QFace *f1 = 0, *f2 = 0; // adjacent faces
3888 bool isBndLink1 = true, isBndLink2 = true;
3889 if ( link1 != theLinks.end() && link2 != theLinks.end() )
3891 f1 = link1->NextFace( this );
3892 f2 = link2->NextFace( this );
3894 isBndLink1 = ( theLink->MediumPos() > (*link1)->MediumPos() );
3895 isBndLink2 = ( theLink->MediumPos() > (*link2)->MediumPos() );
3896 if ( theStep == theFirstStep ) // (issue 22541) quad-dominant mesh
3898 if ( !isBndLink1 && !f1 )
3899 f1 = (*link1)->GetContinuesFace( this ); // get a quadrangle face
3900 if ( !isBndLink2 && !f2 )
3901 f2 = (*link2)->GetContinuesFace( this );
3904 else if ( _sides.size() < 4 )
3907 // propagate to adjacent faces till limit step or boundary
3908 double len1 = thePrevLen + (theLink->MiddlePnt() - _sides[iL1]->MiddlePnt()).Modulus();
3909 double len2 = thePrevLen + (theLink->MiddlePnt() - _sides[iL2]->MiddlePnt()).Modulus();
3910 gp_Vec linkDir1(0,0,0); // initialize to avoid valgrind error ("Conditional jump...")
3911 gp_Vec linkDir2(0,0,0);
3914 if ( f1 && !isBndLink1 )
3915 len1 = f1->MoveByBoundary
3916 ( *link1, theRefVec, theLinks, theFaceHelper, len1, theStep-1, &linkDir1, theSign);
3918 linkDir1 = LinkNorm( iL1/*, theFaceHelper*/ );
3920 MSG( " --------------- EXCEPTION");
3925 if ( f2 && !isBndLink2 )
3926 len2 = f2->MoveByBoundary
3927 ( *link2, theRefVec, theLinks, theFaceHelper, len2, theStep-1, &linkDir2, theSign);
3929 linkDir2 = LinkNorm( iL2/*, theFaceHelper*/ );
3931 MSG( " --------------- EXCEPTION");
3936 if ( theStep != theFirstStep )
3938 // choose chain length by direction of propagation most codirected with theRefVec
3939 bool choose1 = ( theRefVec * linkDir1 * theSign > theRefVec * linkDir2 * theSign );
3940 fullLen = choose1 ? len1 : len2;
3941 double r = thePrevLen / fullLen;
3943 gp_Vec move = linkNorm * refProj * ( 1 - r );
3944 theLink->Move( move, /*sum=*/true );
3946 MSG(string(theStep,'.')<<" Move "<< theLink->_mediumNode->GetID()<<
3947 " by " << refProj * ( 1 - r ) << " following " <<
3948 (choose1 ? *link1->_qlink : *link2->_qlink)); // warning: link1 can be invalid
3950 if ( theLinkNorm ) *theLinkNorm = linkNorm;
3955 //================================================================================
3957 * \brief Checks if the face is distorted due to bentLink
3959 //================================================================================
3961 bool QFace::IsSpoiled(const QLink* bentLink ) const
3963 // code is valid for convex faces only
3965 for ( TIDSortedNodeSet::const_iterator n = begin(); n!=end(); ++n)
3966 gc += XYZ( *n ) / size();
3967 for (unsigned i = 0; i < _sides.size(); ++i )
3969 if ( _sides[i] == bentLink ) continue;
3970 gp_Vec linkNorm = _normal ^ gp_Vec( XYZ(_sides[i]->node1()), XYZ(_sides[i]->node2()));
3971 gp_Vec vecOut( gc, _sides[i]->MiddlePnt() );
3972 if ( linkNorm * vecOut < 0 )
3974 double mag2 = linkNorm.SquareMagnitude();
3975 if ( mag2 > numeric_limits<double>::min() )
3976 linkNorm /= sqrt( mag2 );
3977 gp_Vec vecBent ( _sides[i]->MiddlePnt(), bentLink->MediumPnt());
3978 gp_Vec vecStraight( _sides[i]->MiddlePnt(), bentLink->MiddlePnt());
3979 if ( vecBent * linkNorm > -0.1*vecStraight.Magnitude() )
3986 //================================================================================
3988 * \brief Find pairs of continues faces
3990 //================================================================================
3992 void QLink::SetContinuesFaces() const
3994 // x0 x - QLink, [-|] - QFace, v - volume
3996 // | Between _faces of link x2 two vertical faces are continues
3997 // x1----x2-----x3 and two horizontal faces are continues. We set vertical faces
3998 // | to _faces[0] and _faces[1] and horizontal faces to
3999 // v2 | v3 _faces[2] and _faces[3] (or vise versa).
4002 if ( _faces.empty() )
4004 int iFaceCont = -1, nbBoundary = 0, iBoundary[2]={-1,-1};
4005 if ( _faces[0]->IsBoundary() )
4006 iBoundary[ nbBoundary++ ] = 0;
4007 for ( int iF = 1; iFaceCont < 0 && iF < _faces.size(); ++iF )
4009 // look for a face bounding none of volumes bound by _faces[0]
4010 bool sameVol = false;
4011 int nbVol = _faces[iF]->NbVolumes();
4012 for ( int iV = 0; !sameVol && iV < nbVol; ++iV )
4013 sameVol = ( _faces[iF]->_volumes[iV] == _faces[0]->_volumes[0] ||
4014 _faces[iF]->_volumes[iV] == _faces[0]->_volumes[1]);
4017 if ( _faces[iF]->IsBoundary() )
4018 iBoundary[ nbBoundary++ ] = iF;
4020 // Set continues faces: arrange _faces to have
4021 // _faces[0] continues to _faces[1]
4022 // _faces[2] continues to _faces[3]
4023 if ( nbBoundary == 2 ) // bnd faces are continues
4025 if (( iBoundary[0] < 2 ) != ( iBoundary[1] < 2 ))
4027 int iNear0 = iBoundary[0] < 2 ? 1-iBoundary[0] : 5-iBoundary[0];
4028 std::swap( _faces[ iBoundary[1] ], _faces[iNear0] );
4031 else if ( iFaceCont > 0 ) // continues faces found
4033 if ( iFaceCont != 1 )
4034 std::swap( _faces[1], _faces[iFaceCont] );
4036 else if ( _faces.size() > 1 ) // not found, set NULL by the first face
4038 _faces.insert( ++_faces.begin(), (QFace*) 0 );
4041 //================================================================================
4043 * \brief Return a face continues to the given one
4045 //================================================================================
4047 const QFace* QLink::GetContinuesFace( const QFace* face ) const
4049 for ( int i = 0; i < _faces.size(); ++i ) {
4050 if ( _faces[i] == face ) {
4051 int iF = i < 2 ? 1-i : 5-i;
4052 return iF < _faces.size() ? _faces[iF] : 0;
4057 //================================================================================
4059 * \brief True if link is on mesh boundary
4061 //================================================================================
4063 bool QLink::OnBoundary() const
4065 for ( int i = 0; i < _faces.size(); ++i )
4066 if (_faces[i] && _faces[i]->IsBoundary()) return true;
4069 //================================================================================
4071 * \brief Return normal of link of the chain
4073 //================================================================================
4075 gp_Vec TChainLink::Normal() const {
4077 if (_qfaces[0]) norm = _qfaces[0]->_normal;
4078 if (_qfaces[1]) norm += _qfaces[1]->_normal;
4081 //================================================================================
4083 * \brief Test link curvature taking into account size of faces
4085 //================================================================================
4087 bool TChainLink::IsStraight() const
4089 bool isStraight = _qlink->IsStraight();
4090 if ( isStraight && _qfaces[0] && !_qfaces[1] )
4092 int i = _qfaces[0]->LinkIndex( _qlink );
4093 int iOpp = ( i + 2 ) % _qfaces[0]->_sides.size();
4094 gp_XYZ mid1 = _qlink->MiddlePnt();
4095 gp_XYZ mid2 = _qfaces[0]->_sides[ iOpp ]->MiddlePnt();
4096 double faceSize2 = (mid1-mid2).SquareModulus();
4097 isStraight = _qlink->_nodeMove.SquareMagnitude() < 1/10./10. * faceSize2;
4102 //================================================================================
4104 * \brief Move medium nodes of vertical links of pentahedrons adjacent by side faces
4106 //================================================================================
4108 void fixPrism( TChain& allLinks )
4110 // separate boundary links from internal ones
4111 typedef set<const QLink*/*, QLink::PtrComparator*/> QLinkSet;
4112 QLinkSet interLinks, bndLinks1, bndLink2;
4114 bool isCurved = false;
4115 for ( TChain::iterator lnk = allLinks.begin(); lnk != allLinks.end(); ++lnk ) {
4116 if ( (*lnk)->OnBoundary() )
4117 bndLinks1.insert( lnk->_qlink );
4119 interLinks.insert( lnk->_qlink );
4120 isCurved = isCurved || !lnk->IsStraight();
4123 return; // no need to move
4125 QLinkSet *curBndLinks = &bndLinks1, *newBndLinks = &bndLink2;
4127 while ( !interLinks.empty() && !curBndLinks->empty() )
4129 // propagate movement from boundary links to connected internal links
4130 QLinkSet::iterator bnd = curBndLinks->begin(), bndEnd = curBndLinks->end();
4131 for ( ; bnd != bndEnd; ++bnd )
4133 const QLink* bndLink = *bnd;
4134 for ( int i = 0; i < bndLink->_faces.size(); ++i ) // loop on faces of bndLink
4136 const QFace* face = bndLink->_faces[i]; // quadrange lateral face of a prism
4137 if ( !face ) continue;
4138 // find and move internal link opposite to bndLink within the face
4139 int interInd = ( face->LinkIndex( bndLink ) + 2 ) % face->_sides.size();
4140 const QLink* interLink = face->_sides[ interInd ];
4141 QLinkSet::iterator pInterLink = interLinks.find( interLink );
4142 if ( pInterLink == interLinks.end() ) continue; // not internal link
4143 interLink->Move( bndLink->_nodeMove );
4144 // treated internal links become new boundary ones
4145 interLinks.erase( pInterLink );
4146 newBndLinks->insert( interLink );
4149 curBndLinks->clear();
4150 std::swap( curBndLinks, newBndLinks );
4154 //================================================================================
4156 * \brief Fix links of continues triangles near curved boundary
4158 //================================================================================
4160 void fixTriaNearBoundary( TChain & allLinks, SMESH_MesherHelper& /*helper*/)
4162 if ( allLinks.empty() ) return;
4164 TLinkSet linkSet( allLinks.begin(), allLinks.end());
4165 TLinkInSet linkIt = linkSet.begin(), linksEnd = linkSet.end();
4167 for ( linkIt = linkSet.begin(); linkIt != linksEnd; ++linkIt)
4169 if ( linkIt->IsBoundary() && !linkIt->IsStraight() && linkIt->_qfaces[0])
4171 // move iff a boundary link is bent towards inside of a face (issue 0021084)
4172 const QFace* face = linkIt->_qfaces[0];
4173 gp_XYZ pIn = ( face->_sides[0]->MiddlePnt() +
4174 face->_sides[1]->MiddlePnt() +
4175 face->_sides[2]->MiddlePnt() ) / 3.;
4176 gp_XYZ insideDir( pIn - (*linkIt)->MiddlePnt());
4177 bool linkBentInside = ((*linkIt)->_nodeMove.Dot( insideDir ) > 0 );
4178 //if ( face->IsSpoiled( linkIt->_qlink ))
4179 if ( linkBentInside )
4180 face->MoveByBoundary( *linkIt, (*linkIt)->_nodeMove, linkSet );
4185 //================================================================================
4187 * \brief Detect rectangular structure of links and build chains from them
4189 //================================================================================
4191 enum TSplitTriaResult {
4192 _OK, _NO_CORNERS, _FEW_ROWS, _MANY_ROWS, _NO_SIDELINK, _BAD_MIDQUAD, _NOT_RECT,
4193 _NO_MIDQUAD, _NO_UPTRIA, _BAD_SET_SIZE, _BAD_CORNER, _BAD_START, _NO_BOTLINK, _TWISTED_CHAIN };
4195 TSplitTriaResult splitTrianglesIntoChains( TChain & allLinks,
4196 vector< TChain> & resultChains,
4197 SMDS_TypeOfPosition pos )
4199 // put links in the set and evalute number of result chains by number of boundary links
4202 for ( TChain::iterator lnk = allLinks.begin(); lnk != allLinks.end(); ++lnk ) {
4203 linkSet.insert( *lnk );
4204 nbBndLinks += lnk->IsBoundary();
4206 resultChains.clear();
4207 resultChains.reserve( nbBndLinks / 2 );
4209 TLinkInSet linkIt, linksEnd = linkSet.end();
4211 // find a boundary link with corner node; corner node has position pos-2
4212 // i.e. SMDS_TOP_VERTEX for links on faces and SMDS_TOP_EDGE for
4214 SMDS_TypeOfPosition cornerPos = SMDS_TypeOfPosition(pos-2);
4215 const SMDS_MeshNode* corner = 0;
4216 for ( linkIt = linkSet.begin(); linkIt != linksEnd; ++linkIt )
4217 if ( linkIt->IsBoundary() && (corner = (*linkIt)->EndPosNode(cornerPos)))
4222 TLinkInSet startLink = linkIt;
4223 const SMDS_MeshNode* startCorner = corner;
4224 vector< TChain* > rowChains;
4227 while ( startLink != linksEnd) // loop on columns
4229 // We suppose we have a rectangular structure like shown here. We have found a
4230 // corner of the rectangle (startCorner) and a boundary link sharing
4231 // |/ |/ | the startCorner (startLink). We are going to loop on rows of the
4232 // --o---o---o structure making several chains at once. One chain (columnChain)
4233 // |\ | /| starts at startLink and continues upward (we look at the structure
4234 // \ | \ | / | from such point that startLink is on the bottom of the structure).
4235 // \| \|/ | While going upward we also fill horizontal chains (rowChains) we
4236 // --o---o---o encounter.
4238 // / | \ | \ | startCorner
4243 if ( resultChains.size() == nbBndLinks / 2 )
4245 resultChains.push_back( TChain() );
4246 TChain& columnChain = resultChains.back();
4248 TLinkInSet botLink = startLink; // current horizontal link to go up from
4249 corner = startCorner; // current corner the botLink ends at
4251 while ( botLink != linksEnd ) // loop on rows
4253 // add botLink to the columnChain
4254 columnChain.push_back( *botLink );
4256 const QFace* botTria = botLink->_qfaces[0]; // bottom triangle bound by botLink
4258 { // the column ends
4259 if ( botLink == startLink )
4260 return _TWISTED_CHAIN; // issue 0020951
4261 linkSet.erase( botLink );
4262 if ( iRow != rowChains.size() )
4263 return _FEW_ROWS; // different nb of rows in columns
4266 // find the link dividing the quadrangle (midQuadLink) and vertical boundary
4267 // link ending at <corner> (sideLink); there are two cases:
4268 // 1) midQuadLink does not end at <corner>, then we easily find it by botTria,
4269 // since midQuadLink is not at boundary while sideLink is.
4270 // 2) midQuadLink ends at <corner>
4272 TLinkInSet midQuadLink = linksEnd;
4273 TLinkInSet sideLink = botTria->GetBoundaryLink( linkSet, *botLink, &midQuadLink,
4275 if ( isCase2 ) { // find midQuadLink among links of botTria
4276 midQuadLink = botTria->GetLinkByNode( linkSet, *botLink, corner );
4277 if ( midQuadLink->IsBoundary() )
4278 return _BAD_MIDQUAD;
4280 if ( sideLink == linksEnd || midQuadLink == linksEnd || sideLink == midQuadLink )
4281 return sideLink == linksEnd ? _NO_SIDELINK : _NO_MIDQUAD;
4284 columnChain.push_back( *midQuadLink );
4285 if ( iRow >= rowChains.size() ) {
4287 return _MANY_ROWS; // different nb of rows in columns
4288 if ( resultChains.size() == nbBndLinks / 2 )
4290 resultChains.push_back( TChain() );
4291 rowChains.push_back( & resultChains.back() );
4293 rowChains[iRow]->push_back( *sideLink );
4294 rowChains[iRow]->push_back( *midQuadLink );
4296 const QFace* upTria = midQuadLink->NextFace( botTria ); // upper tria of the rectangle
4300 // prepare startCorner and startLink for the next column
4301 startCorner = startLink->NextNode( startCorner );
4303 startLink = botTria->GetBoundaryLink( linkSet, *botLink, 0, startCorner );
4305 startLink = upTria->GetBoundaryLink( linkSet, *midQuadLink, 0, startCorner );
4306 // check if no more columns remains
4307 if ( startLink != linksEnd ) {
4308 const SMDS_MeshNode* botNode = startLink->NextNode( startCorner );
4309 if ( (isCase2 ? botTria : upTria)->Contains( botNode ))
4310 startLink = linksEnd; // startLink bounds upTria or botTria
4311 else if ( startLink == botLink || startLink == midQuadLink || startLink == sideLink )
4315 // find bottom link and corner for the next row
4316 corner = sideLink->NextNode( corner );
4317 // next bottom link ends at the new corner
4318 linkSet.erase( botLink );
4319 botLink = upTria->GetLinkByNode( linkSet, (isCase2 ? *sideLink : *midQuadLink), corner );
4320 if ( botLink == linksEnd || botLink == midQuadLink || botLink == sideLink)
4322 if ( midQuadLink == startLink || sideLink == startLink )
4323 return _TWISTED_CHAIN; // issue 0020951
4324 linkSet.erase( midQuadLink );
4325 linkSet.erase( sideLink );
4327 // make faces neighboring the found ones be boundary
4328 if ( startLink != linksEnd ) {
4329 const QFace* tria = isCase2 ? botTria : upTria;
4330 for ( int iL = 0; iL < 3; ++iL ) {
4331 linkIt = linkSet.find( tria->_sides[iL] );
4332 if ( linkIt != linksEnd )
4333 linkIt->RemoveFace( tria );
4336 if ( botLink->_qfaces[0] == upTria || botLink->_qfaces[1] == upTria )
4337 botLink->RemoveFace( upTria ); // make next botTria first in vector
4344 // In the linkSet, there must remain the last links of rowChains; add them
4345 if ( linkSet.size() != rowChains.size() )
4346 return _BAD_SET_SIZE;
4347 for ( int iRow = 0; iRow < rowChains.size(); ++iRow ) {
4348 // find the link (startLink) ending at startCorner
4350 for ( startLink = linkSet.begin(); startLink != linksEnd; ++startLink ) {
4351 if ( (*startLink)->node1() == startCorner ) {
4352 corner = (*startLink)->node2(); break;
4354 else if ( (*startLink)->node2() == startCorner) {
4355 corner = (*startLink)->node1(); break;
4358 if ( startLink == linksEnd )
4360 rowChains[ iRow ]->push_back( *startLink );
4361 linkSet.erase( startLink );
4362 startCorner = corner;
4368 //================================================================================
4370 * \brief Place medium nodes at the link middle for elements whose corner nodes
4371 * are out of geometrical boundary to prevent distorting elements.
4372 * Issue 0020982, note 0013990
4374 //================================================================================
4376 void force3DOutOfBoundary( SMESH_MesherHelper& theHelper,
4377 SMESH_ComputeErrorPtr& theError)
4379 SMESHDS_Mesh* meshDS = theHelper.GetMeshDS();
4380 TopoDS_Shape shape = theHelper.GetSubShape().Oriented( TopAbs_FORWARD );
4381 if ( shape.IsNull() ) return;
4383 if ( !theError ) theError = SMESH_ComputeError::New();
4387 if ( shape.ShapeType() == TopAbs_FACE ) // 2D
4389 if ( theHelper.GetMesh()->NbTriangles( ORDER_QUADRATIC ) < 1 ) return;
4391 SMESHDS_SubMesh* faceSM = meshDS->MeshElements( shape );
4392 if ( !faceSM ) return;
4394 const TopoDS_Face& face = TopoDS::Face( shape );
4395 Handle(Geom_Surface) surface = BRep_Tool::Surface( face );
4397 TopExp_Explorer edgeIt( face, TopAbs_EDGE );
4398 for ( ; edgeIt.More(); edgeIt.Next() ) // loop on EDGEs of a FACE
4400 // check if the EDGE needs checking
4401 const TopoDS_Edge& edge = TopoDS::Edge( edgeIt.Current() );
4402 if ( SMESH_Algo::isDegenerated( edge ) )
4404 if ( theHelper.IsRealSeam( edge ) &&
4405 edge.Orientation() == TopAbs_REVERSED )
4408 SMESHDS_SubMesh* edgeSM = meshDS->MeshElements( edge );
4409 if ( !edgeSM ) continue;
4412 Handle(Geom2d_Curve) pcurve = BRep_Tool::CurveOnSurface( edge, face, f, l );
4413 BRepAdaptor_Curve curve3D( edge );
4414 switch ( curve3D.GetType() ) {
4415 case GeomAbs_Line: continue;
4416 case GeomAbs_Circle:
4417 case GeomAbs_Ellipse:
4418 case GeomAbs_Hyperbola:
4419 case GeomAbs_Parabola:
4422 gp_Vec D1, D2, Du1, Dv1; gp_Pnt p;
4423 curve3D.D2( 0.5 * ( f + l ), p, D1, D2 );
4424 gp_Pnt2d uv = pcurve->Value( 0.5 * ( f + l ) );
4425 surface->D1( uv.X(), uv.Y(), p, Du1, Dv1 );
4426 gp_Vec fNorm = Du1 ^ Dv1;
4427 if ( fNorm.IsParallel( D2, M_PI * 25./180. ))
4428 continue; // face is normal to the curve3D
4430 gp_Vec curvNorm = fNorm ^ D1;
4431 if ( edge.Orientation() == TopAbs_REVERSED ) curvNorm.Reverse();
4432 if ( curvNorm * D2 > 0 )
4433 continue; // convex edge
4435 catch ( Standard_Failure )
4440 // get nodes shared by faces that may be distorted
4441 SMDS_NodeIteratorPtr nodeIt;
4442 if ( edgeSM->NbNodes() > 0 ) {
4443 nodeIt = edgeSM->GetNodes();
4446 SMESHDS_SubMesh* vertexSM = meshDS->MeshElements( theHelper.IthVertex( 0, edge ));
4448 vertexSM = meshDS->MeshElements( theHelper.IthVertex( 1, edge ));
4449 if ( !vertexSM ) continue;
4450 nodeIt = vertexSM->GetNodes();
4453 // find suspicious faces
4454 TIDSortedElemSet checkedFaces;
4455 vector< const SMDS_MeshNode* > nOnEdge( 2 );
4456 const SMDS_MeshNode* nOnFace;
4457 while ( nodeIt->more() )
4459 const SMDS_MeshNode* n = nodeIt->next();
4460 SMDS_ElemIteratorPtr faceIt = n->GetInverseElementIterator( SMDSAbs_Face );
4461 while ( faceIt->more() )
4463 const SMDS_MeshElement* f = faceIt->next();
4464 if ( !faceSM->Contains( f ) ||
4465 f->NbNodes() < 6 || // check quadratic triangles only
4466 !checkedFaces.insert( f ).second )
4469 // get nodes on EDGE and on FACE of a suspicious face
4470 nOnEdge.clear(); nOnFace = 0;
4471 SMDS_MeshElement::iterator triNode = f->begin_nodes();
4472 for ( int nbN = 0; nbN < 3; ++triNode, ++nbN )
4475 if ( n->GetPosition()->GetDim() == 2 )
4478 nOnEdge.push_back( n );
4481 // check if nOnFace is inside the FACE
4482 if ( nOnFace && nOnEdge.size() == 2 )
4484 theHelper.AddTLinks( static_cast< const SMDS_MeshFace* > ( f ));
4485 if ( !SMESH_MeshAlgos::FaceNormal( f, faceNorm, /*normalized=*/false ))
4487 gp_XYZ edgeDir = SMESH_TNodeXYZ( nOnEdge[0] ) - SMESH_TNodeXYZ( nOnEdge[1] );
4488 gp_XYZ edgeNorm = faceNorm ^ edgeDir;
4489 n = theHelper.GetMediumNode( nOnEdge[0], nOnEdge[1], true ); // find n, not create
4490 gp_XYZ pN0 = SMESH_TNodeXYZ( nOnEdge[0] );
4491 gp_XYZ pMedium = SMESH_TNodeXYZ( n ); // on-edge node location
4492 gp_XYZ pFaceN = SMESH_TNodeXYZ( nOnFace ); // on-face node location
4493 double hMedium = edgeNorm * gp_Vec( pN0, pMedium ).XYZ();
4494 double hFace = edgeNorm * gp_Vec( pN0, pFaceN ).XYZ();
4495 if ( Abs( hMedium ) > Abs( hFace * 0.6 ))
4497 // nOnFace is out of FACE, move a medium on-edge node to the middle
4498 gp_XYZ pMid3D = 0.5 * ( pN0 + SMESH_TNodeXYZ( nOnEdge[1] ));
4499 meshDS->MoveNode( n, pMid3D.X(), pMid3D.Y(), pMid3D.Z() );
4500 MSG( "move OUT of face " << n );
4501 theError->myBadElements.push_back( f );
4507 if ( !theError->myBadElements.empty() )
4508 theError->myName = EDITERR_NO_MEDIUM_ON_GEOM;
4511 } // 2D ==============================================================================
4513 if ( shape.ShapeType() == TopAbs_SOLID ) // 3D
4515 if ( theHelper.GetMesh()->NbTetras ( ORDER_QUADRATIC ) < 1 &&
4516 theHelper.GetMesh()->NbPyramids( ORDER_QUADRATIC ) < 1 ) return;
4518 SMESHDS_SubMesh* solidSM = meshDS->MeshElements( shape );
4519 if ( !solidSM ) return;
4521 // check if the SOLID is bound by concave FACEs
4522 vector< TopoDS_Face > concaveFaces;
4523 TopExp_Explorer faceIt( shape, TopAbs_FACE );
4524 for ( ; faceIt.More(); faceIt.Next() ) // loop on FACEs of a SOLID
4526 const TopoDS_Face& face = TopoDS::Face( faceIt.Current() );
4527 if ( !meshDS->MeshElements( face )) continue;
4529 BRepAdaptor_Surface surface( face );
4530 switch ( surface.GetType() ) {
4531 case GeomAbs_Plane: continue;
4532 case GeomAbs_Cylinder:
4534 case GeomAbs_Sphere:
4537 double u = 0.5 * ( surface.FirstUParameter() + surface.LastUParameter() );
4538 double v = 0.5 * ( surface.FirstVParameter() + surface.LastVParameter() );
4539 gp_Vec Du1, Dv1, Du2, Dv2, Duv2; gp_Pnt p;
4540 surface.D2( u,v, p, Du1, Dv1, Du2, Dv2, Duv2 );
4541 gp_Vec fNorm = Du1 ^ Dv1;
4542 if ( face.Orientation() == TopAbs_REVERSED ) fNorm.Reverse();
4543 bool concaveU = ( fNorm * Du2 > 1e-100 );
4544 bool concaveV = ( fNorm * Dv2 > 1e-100 );
4545 if ( concaveU || concaveV )
4546 concaveFaces.push_back( face );
4548 catch ( Standard_Failure )
4550 concaveFaces.push_back( face );
4554 if ( concaveFaces.empty() )
4557 // fix 2D mesh on the SOLID
4558 for ( faceIt.ReInit(); faceIt.More(); faceIt.Next() ) // loop on FACEs of a SOLID
4560 SMESH_MesherHelper faceHelper( *theHelper.GetMesh() );
4561 faceHelper.SetSubShape( faceIt.Current() );
4562 force3DOutOfBoundary( faceHelper, theError );
4565 // get an iterator over faces on concaveFaces
4566 vector< SMDS_ElemIteratorPtr > faceIterVec( concaveFaces.size() );
4567 for ( size_t i = 0; i < concaveFaces.size(); ++i )
4568 faceIterVec[i] = meshDS->MeshElements( concaveFaces[i] )->GetElements();
4569 typedef SMDS_IteratorOnIterators
4570 < const SMDS_MeshElement*, vector< SMDS_ElemIteratorPtr > > TIterOnIter;
4571 SMDS_ElemIteratorPtr faceIter( new TIterOnIter( faceIterVec ));
4573 // a seacher to check if a volume is close to a concave face
4574 std::auto_ptr< SMESH_ElementSearcher > faceSearcher
4575 ( SMESH_MeshAlgos::GetElementSearcher( *theHelper.GetMeshDS(), faceIter ));
4578 //BRepClass3d_SolidClassifier solidClassifier( shape );
4580 TIDSortedElemSet checkedVols, movedNodes;
4581 //for ( faceIt.ReInit(); faceIt.More(); faceIt.Next() ) // loop on FACEs of a SOLID
4582 for ( size_t iF = 0; iF < concaveFaces.size(); ++iF ) // loop on concave FACEs
4584 //const TopoDS_Shape& face = faceIt.Current();
4585 const TopoDS_Shape& face = concaveFaces[ iF ];
4586 SMESHDS_SubMesh* faceSM = meshDS->MeshElements( face );
4587 if ( !faceSM ) continue;
4589 // get nodes shared by volumes (tet and pyra) on the FACE that may be distorted
4590 SMDS_NodeIteratorPtr nodeIt;
4591 if ( faceSM->NbNodes() > 0 ) {
4592 nodeIt = faceSM->GetNodes();
4595 TopExp_Explorer vertex( face, TopAbs_VERTEX );
4596 SMESHDS_SubMesh* vertexSM = meshDS->MeshElements( vertex.Current() );
4597 if ( !vertexSM ) continue;
4598 nodeIt = vertexSM->GetNodes();
4600 // get ids of sub-shapes of the FACE
4602 SMESH_subMeshIteratorPtr smIt =
4603 theHelper.GetMesh()->GetSubMesh( face )->getDependsOnIterator(/*includeSelf=*/true);
4604 while ( smIt->more() )
4605 subIDs.insert( smIt->next()->GetId() );
4607 // find suspicious volumes adjacent to the FACE
4608 vector< const SMDS_MeshNode* > nOnFace( 4 );
4609 const SMDS_MeshNode* nInSolid;
4610 while ( nodeIt->more() )
4612 const SMDS_MeshNode* n = nodeIt->next();
4613 SMDS_ElemIteratorPtr volIt = n->GetInverseElementIterator( SMDSAbs_Volume );
4614 while ( volIt->more() )
4616 const SMDS_MeshElement* vol = volIt->next();
4617 int nbN = vol->NbCornerNodes();
4618 if ( ( nbN != 4 && nbN != 5 ) ||
4619 !solidSM->Contains( vol ) ||
4620 !checkedVols.insert( vol ).second )
4623 // get nodes on FACE and in SOLID of a suspicious volume
4624 nOnFace.clear(); nInSolid = 0;
4625 SMDS_MeshElement::iterator volNode = vol->begin_nodes();
4626 for ( int nb = nbN; nb > 0; ++volNode, --nb )
4629 if ( n->GetPosition()->GetDim() == 3 )
4631 else if ( subIDs.count( n->getshapeId() ))
4632 nOnFace.push_back( n );
4636 if ( !nInSolid || nOnFace.size() != nbN - 1 )
4639 // get size of the vol
4640 SMESH_TNodeXYZ pInSolid( nInSolid ), pOnFace0( nOnFace[0] );
4641 double volLength = pInSolid.SquareDistance( nOnFace[0] );
4642 for ( size_t i = 1; i < nOnFace.size(); ++i )
4644 volLength = Max( volLength, pOnFace0.SquareDistance( nOnFace[i] ));
4647 // check if vol is close to concaveFaces
4648 const SMDS_MeshElement* closeFace =
4649 faceSearcher->FindClosestTo( pInSolid, SMDSAbs_Face );
4651 pInSolid.SquareDistance( closeFace->GetNode(0) ) > 4 * volLength )
4654 // check if vol is distorted, i.e. a medium node is much closer
4655 // to nInSolid than the link middle
4656 bool isDistorted = false;
4657 SMDS_FaceOfNodes onFaceTria( nOnFace[0], nOnFace[1], nOnFace[2] );
4658 if ( !SMESH_MeshAlgos::FaceNormal( &onFaceTria, faceNorm, /*normalized=*/false ))
4660 theHelper.AddTLinks( static_cast< const SMDS_MeshVolume* > ( vol ));
4661 vector< pair< SMESH_TLink, const SMDS_MeshNode* > > links;
4662 for ( size_t i = 0; i < nOnFace.size(); ++i ) // loop on links between nOnFace
4663 for ( size_t j = i+1; j < nOnFace.size(); ++j )
4665 SMESH_TLink link( nOnFace[i], nOnFace[j] );
4666 TLinkNodeMap::const_iterator linkIt =
4667 theHelper.GetTLinkNodeMap().find( link );
4668 if ( linkIt != theHelper.GetTLinkNodeMap().end() )
4670 links.push_back( make_pair( linkIt->first, linkIt->second ));
4671 if ( !isDistorted ) {
4672 // compare projections of nInSolid and nMedium to face normal
4673 gp_Pnt pMedium = SMESH_TNodeXYZ( linkIt->second );
4674 double hMedium = faceNorm * gp_Vec( pOnFace0, pMedium ).XYZ();
4675 double hVol = faceNorm * gp_Vec( pOnFace0, pInSolid ).XYZ();
4676 isDistorted = ( Abs( hMedium ) > Abs( hVol * 0.5 ));
4680 // move medium nodes to link middle
4683 for ( size_t i = 0; i < links.size(); ++i )
4685 const SMDS_MeshNode* nMedium = links[i].second;
4686 if ( movedNodes.insert( nMedium ).second )
4688 gp_Pnt pMid3D = 0.5 * ( SMESH_TNodeXYZ( links[i].first.node1() ) +
4689 SMESH_TNodeXYZ( links[i].first.node2() ));
4690 meshDS->MoveNode( nMedium, pMid3D.X(), pMid3D.Y(), pMid3D.Z() );
4691 MSG( "move OUT of solid " << nMedium );
4694 theError->myBadElements.push_back( vol );
4696 } // loop on volumes sharing a node on FACE
4697 } // loop on nodes on FACE
4698 } // loop on FACEs of a SOLID
4700 if ( !theError->myBadElements.empty() )
4701 theError->myName = EDITERR_NO_MEDIUM_ON_GEOM;
4707 //=======================================================================
4709 * \brief Move medium nodes of faces and volumes to fix distorted elements
4710 * \param error - container of fixed distorted elements
4711 * \param volumeOnly - to fix nodes on faces or not, if the shape is solid
4713 * Issue 0020307: EDF 992 SMESH : Linea/Quadratic with Medium Node on Geometry
4715 //=======================================================================
4717 void SMESH_MesherHelper::FixQuadraticElements(SMESH_ComputeErrorPtr& compError,
4720 // setenv NO_FixQuadraticElements to know if FixQuadraticElements() is guilty of bad conversion
4721 if ( getenv("NO_FixQuadraticElements") )
4724 // 0. Apply algorithm to SOLIDs or FACEs
4725 // ----------------------------------------------
4726 if ( myShape.IsNull() ) {
4727 if ( !myMesh->HasShapeToMesh() ) return;
4728 SetSubShape( myMesh->GetShapeToMesh() );
4732 TopTools_IndexedMapOfShape solids;
4733 TopExp::MapShapes(myShape,TopAbs_SOLID,solids);
4734 nbSolids = solids.Extent();
4736 TopTools_MapOfShape faces; // faces not in solid or in not meshed solid
4737 for ( TopExp_Explorer f(myShape,TopAbs_FACE,TopAbs_SOLID); f.More(); f.Next() ) {
4738 faces.Add( f.Current() ); // not in solid
4740 for ( TopExp_Explorer s(myShape,TopAbs_SOLID); s.More(); s.Next() ) {
4741 if ( myMesh->GetSubMesh( s.Current() )->IsEmpty() ) { // get faces of solid
4742 for ( TopExp_Explorer f( s.Current(), TopAbs_FACE); f.More(); f.Next() )
4743 faces.Add( f.Current() ); // in not meshed solid
4745 else { // fix nodes in the solid and its faces
4747 MSG("FIX SOLID " << nbSolids-- << " #" << GetMeshDS()->ShapeToIndex(s.Current()));
4749 SMESH_MesherHelper h(*myMesh);
4750 h.SetSubShape( s.Current() );
4751 h.ToFixNodeParameters(true);
4752 h.FixQuadraticElements( compError, false );
4755 // fix nodes on geom faces
4757 int nbfaces = faces.Extent(); /*avoid "unused varianbles": */ nbfaces++, nbfaces--;
4759 for ( TopTools_MapIteratorOfMapOfShape fIt( faces ); fIt.More(); fIt.Next() ) {
4760 MSG("FIX FACE " << nbfaces-- << " #" << GetMeshDS()->ShapeToIndex(fIt.Key()));
4761 SMESH_MesherHelper h(*myMesh);
4762 h.SetSubShape( fIt.Key() );
4763 h.ToFixNodeParameters(true);
4764 h.FixQuadraticElements( compError, true);
4766 //perf_print_all_meters(1);
4767 if ( compError && compError->myName == EDITERR_NO_MEDIUM_ON_GEOM )
4768 compError->myComment = "during conversion to quadratic, "
4769 "some medium nodes were not placed on geometry to avoid distorting elements";
4773 // 1. Find out type of elements and get iterator on them
4774 // ---------------------------------------------------
4776 SMDS_ElemIteratorPtr elemIt;
4777 SMDSAbs_ElementType elemType = SMDSAbs_All;
4779 SMESH_subMesh* submesh = myMesh->GetSubMeshContaining( myShapeID );
4782 if ( SMESHDS_SubMesh* smDS = submesh->GetSubMeshDS() ) {
4783 elemIt = smDS->GetElements();
4784 if ( elemIt->more() ) {
4785 elemType = elemIt->next()->GetType();
4786 elemIt = smDS->GetElements();
4789 if ( !elemIt || !elemIt->more() || elemType < SMDSAbs_Face )
4792 // 2. Fill in auxiliary data structures
4793 // ----------------------------------
4797 set< QLink >::iterator pLink;
4798 set< QFace >::iterator pFace;
4800 bool isCurved = false;
4801 //bool hasRectFaces = false;
4802 //set<int> nbElemNodeSet;
4803 SMDS_VolumeTool volTool;
4805 TIDSortedNodeSet apexOfPyramid;
4806 const int apexIndex = 4;
4809 // Move medium nodes to the link middle for elements whose corner nodes
4810 // are out of geometrical boundary to fix distorted elements.
4811 force3DOutOfBoundary( *this, compError );
4813 if ( elemType == SMDSAbs_Volume )
4815 while ( elemIt->more() ) // loop on volumes
4817 const SMDS_MeshElement* vol = elemIt->next();
4818 if ( !vol->IsQuadratic() || !volTool.Set( vol ))
4820 double volMinSize2 = -1.;
4821 for ( int iF = 0; iF < volTool.NbFaces(); ++iF ) // loop on faces of volume
4823 int nbN = volTool.NbFaceNodes( iF );
4824 //nbElemNodeSet.insert( nbN );
4825 const SMDS_MeshNode** faceNodes = volTool.GetFaceNodes( iF );
4826 vector< const QLink* > faceLinks( nbN/2 );
4827 for ( int iN = 0; iN < nbN; iN += 2 ) // loop on links of a face
4830 QLink link( faceNodes[iN], faceNodes[iN+2], faceNodes[iN+1] );
4831 pLink = links.insert( link ).first;
4832 faceLinks[ iN/2 ] = & *pLink;
4834 if ( link.MediumPos() == SMDS_TOP_3DSPACE )
4836 if ( !link.IsStraight() )
4837 return; // already fixed
4839 else if ( !isCurved )
4841 if ( volMinSize2 < 0 ) volMinSize2 = volTool.MinLinearSize2();
4842 isCurved = !isStraightLink( volMinSize2, link._nodeMove.SquareMagnitude() );
4846 pFace = faces.insert( QFace( faceLinks )).first;
4847 if ( pFace->NbVolumes() == 0 )
4848 pFace->AddSelfToLinks();
4849 pFace->SetVolume( vol );
4850 // hasRectFaces = hasRectFaces ||
4851 // ( volTool.GetVolumeType() == SMDS_VolumeTool::QUAD_HEXA ||
4852 // volTool.GetVolumeType() == SMDS_VolumeTool::QUAD_PENTA );
4855 pFace->_face = GetMeshDS()->FindFace(faceNodes[0],faceNodes[2],faceNodes[4]);
4857 pFace->_face = GetMeshDS()->FindFace(faceNodes[0],faceNodes[2],
4858 faceNodes[4],faceNodes[6] );
4861 // collect pyramid apexes for further correction
4862 if ( vol->NbCornerNodes() == 5 )
4863 apexOfPyramid.insert( vol->GetNode( apexIndex ));
4865 set< QLink >::iterator pLink = links.begin();
4866 for ( ; pLink != links.end(); ++pLink )
4867 pLink->SetContinuesFaces();
4871 while ( elemIt->more() ) // loop on faces
4873 const SMDS_MeshElement* face = elemIt->next();
4874 if ( !face->IsQuadratic() )
4876 //nbElemNodeSet.insert( face->NbNodes() );
4877 int nbN = face->NbNodes()/2;
4878 vector< const QLink* > faceLinks( nbN );
4879 for ( int iN = 0; iN < nbN; ++iN ) // loop on links of a face
4882 QLink link( face->GetNode(iN), face->GetNode((iN+1)%nbN), face->GetNode(iN+nbN) );
4883 pLink = links.insert( link ).first;
4884 faceLinks[ iN ] = & *pLink;
4886 link.node1()->GetPosition()->GetTypeOfPosition() < 2 &&
4887 link.node2()->GetPosition()->GetTypeOfPosition() < 2 )
4888 isCurved = !link.IsStraight();
4891 pFace = faces.insert( QFace( faceLinks )).first;
4892 pFace->AddSelfToLinks();
4893 //hasRectFaces = ( hasRectFaces || nbN == 4 );
4897 return; // no curved edges of faces
4899 // 3. Compute displacement of medium nodes
4900 // ---------------------------------------
4902 SMESH_MesherHelper faceHlp(*myMesh);
4904 // two loops on QFaces: the first is to treat boundary links, the second is for internal ones.
4905 TopLoc_Location loc;
4907 // not to treat boundary of volumic sub-mesh.
4908 int isInside = ( elemType == SMDSAbs_Volume && volumeOnly ) ? 1 : 0;
4909 for ( ; isInside < 2; ++isInside )
4911 MSG( "--------------- LOOP (inside=" << isInside << ") ------------------");
4912 SMDS_TypeOfPosition pos = isInside ? SMDS_TOP_3DSPACE : SMDS_TOP_FACE;
4913 SMDS_TypeOfPosition bndPos = isInside ? SMDS_TOP_FACE : SMDS_TOP_EDGE;
4915 for ( pFace = faces.begin(); pFace != faces.end(); ++pFace ) {
4916 if ( bool(isInside) == pFace->IsBoundary() )
4918 for ( int dir = 0; dir < 2; ++dir ) // 2 directions of propagation from the quadrangle
4921 // make chain of links connected via continues faces
4924 if ( !pFace->GetLinkChain( dir, rawChain, pos, error) && error ==ERR_UNKNOWN ) continue;
4926 if ( !pFace->GetLinkChain( dir+2, rawChain, pos, error ) && error ==ERR_UNKNOWN ) continue;
4928 vector< TChain > chains;
4929 if ( error == ERR_OK ) { // chain contains continues rectangles
4931 chains[0].splice( chains[0].begin(), rawChain );
4933 else if ( error == ERR_TRI ) { // chain contains continues triangles
4934 TSplitTriaResult res = splitTrianglesIntoChains( rawChain, chains, pos );
4935 if ( res != _OK ) { // not 'quadrangles split into triangles' in chain
4936 fixTriaNearBoundary( rawChain, *this );
4940 else if ( error == ERR_PRISM ) { // quadrangle side faces of prisms
4941 fixPrism( rawChain );
4947 for ( int iC = 0; iC < chains.size(); ++iC )
4949 TChain& chain = chains[iC];
4950 if ( chain.empty() ) continue;
4951 if ( chain.front().IsStraight() && chain.back().IsStraight() ) {
4952 MSG("3D straight - ignore");
4955 if ( chain.front()->MediumPos() > bndPos ||
4956 chain.back() ->MediumPos() > bndPos ) {
4957 MSG("Internal chain - ignore");
4960 // mesure chain length and compute link position along the chain
4961 double chainLen = 0;
4962 vector< double > linkPos;
4963 TChain savedChain; // backup
4964 MSGBEG( "Link medium nodes: ");
4965 TChain::iterator link0 = chain.begin(), link1 = chain.begin(), link2;
4966 for ( ++link1; link1 != chain.end(); ++link1, ++link0 ) {
4967 MSGBEG( (*link0)->_mediumNode->GetID() << "-" <<(*link1)->_mediumNode->GetID()<<" ");
4968 double len = ((*link0)->MiddlePnt() - (*link1)->MiddlePnt()).Modulus();
4969 while ( len < numeric_limits<double>::min() ) { // remove degenerated link
4970 if ( savedChain.empty() ) savedChain = chain;
4971 link1 = chain.erase( link1 );
4972 if ( link1 == chain.end() )
4974 len = ((*link0)->MiddlePnt() - (*link1)->MiddlePnt()).Modulus();
4977 linkPos.push_back( chainLen );
4980 if ( linkPos.size() <= 2 && savedChain.size() > 2 ) {
4985 for ( link1 = chain.begin(); link1 != chain.end(); ++link1 ) {
4987 linkPos.push_back( chainLen );
4990 gp_Vec move0 = chain.front()->_nodeMove;
4991 gp_Vec move1 = chain.back ()->_nodeMove;
4996 // compute node displacement of end links of chain in parametric space of FACE
4997 TChainLink& linkOnFace = *(++chain.begin());
4998 const SMDS_MeshNode* nodeOnFace = linkOnFace->_mediumNode;
4999 TopoDS_Shape f = GetSubShapeByNode( nodeOnFace, GetMeshDS() );
5000 if ( !f.IsNull() && f.ShapeType() == TopAbs_FACE )
5002 face = TopoDS::Face( f );
5003 faceHlp.SetSubShape( face );
5004 Handle(Geom_Surface) surf = BRep_Tool::Surface(face,loc);
5005 //bool isStraight[2]; // commented for issue 0023118
5006 for ( int is1 = 0; is1 < 2; ++is1 ) // move0 or move1
5008 TChainLink& link = is1 ? chain.back() : chain.front();
5009 gp_XY uvm = faceHlp.GetNodeUV( face, link->_mediumNode, nodeOnFace, &checkUV );
5010 gp_XY uv1 = faceHlp.GetNodeUV( face, link->node1(), nodeOnFace, &checkUV );
5011 gp_XY uv2 = faceHlp.GetNodeUV( face, link->node2(), nodeOnFace, &checkUV );
5012 gp_XY uv12 = faceHlp.GetMiddleUV( surf, uv1, uv2 );
5013 // uvMove = uvm - uv12
5014 gp_XY uvMove = ApplyIn2D(surf, uvm, uv12, gp_XY_Subtracted, /*inPeriod=*/false);
5015 ( is1 ? move1 : move0 ).SetCoord( uvMove.X(), uvMove.Y(), 0 );
5016 if ( !is1 ) // correct nodeOnFace for move1 (issue 0020919)
5017 nodeOnFace = (*(++chain.rbegin()))->_mediumNode;
5018 // isStraight[is1] = isStraightLink( (uv2-uv1).SquareModulus(),
5019 // 10 * uvMove.SquareModulus());
5021 // if ( isStraight[0] && isStraight[1] ) {
5022 // MSG("2D straight - ignore");
5023 // continue; // straight - no need to move nodes of internal links
5026 // check if a chain is already fixed
5027 gp_XY uvm = faceHlp.GetNodeUV( face, linkOnFace->_mediumNode, 0, &checkUV );
5028 gp_XY uv1 = faceHlp.GetNodeUV( face, linkOnFace->node1(), nodeOnFace, &checkUV );
5029 gp_XY uv2 = faceHlp.GetNodeUV( face, linkOnFace->node2(), nodeOnFace, &checkUV );
5030 gp_XY uv12 = faceHlp.GetMiddleUV( surf, uv1, uv2 );
5031 if (( uvm - uv12 ).SquareModulus() > 1e-10 )
5033 MSG("Already fixed - ignore");
5039 if ( isInside || face.IsNull() )
5041 // compute node displacement of end links in their local coord systems
5043 TChainLink& ln0 = chain.front(), ln1 = *(++chain.begin());
5044 trsf.SetTransformation( gp_Ax3( gp::Origin(), ln0.Normal(),
5045 gp_Vec( ln0->MiddlePnt(), ln1->MiddlePnt() )));
5046 move0.Transform(trsf);
5049 TChainLink& ln0 = *(++chain.rbegin()), ln1 = chain.back();
5050 trsf.SetTransformation( gp_Ax3( gp::Origin(), ln1.Normal(),
5051 gp_Vec( ln0->MiddlePnt(), ln1->MiddlePnt() )));
5052 move1.Transform(trsf);
5055 // compute displacement of medium nodes
5056 link2 = chain.begin();
5059 for ( int i = 0; link2 != chain.end(); ++link0, ++link1, ++link2, ++i )
5061 double r = linkPos[i] / chainLen;
5062 // displacement in local coord system
5063 gp_Vec move = (1. - r) * move0 + r * move1;
5064 if ( isInside || face.IsNull()) {
5065 // transform to global
5066 gp_Vec x01( (*link0)->MiddlePnt(), (*link1)->MiddlePnt() );
5067 gp_Vec x12( (*link1)->MiddlePnt(), (*link2)->MiddlePnt() );
5069 gp_Vec x = x01.Normalized() + x12.Normalized();
5070 trsf.SetTransformation( gp_Ax3( gp::Origin(), link1->Normal(), x), gp_Ax3() );
5071 } catch ( Standard_Failure ) {
5074 move.Transform(trsf);
5075 (*link1)->Move( move, /*sum=*/false, /*is2dFixed=*/false );
5078 // compute 3D displacement by 2D one
5079 Handle(Geom_Surface) s = BRep_Tool::Surface(face,loc);
5080 gp_XY oldUV = faceHlp.GetNodeUV( face, (*link1)->_mediumNode, 0, &checkUV );
5081 gp_XY newUV = ApplyIn2D( s, oldUV, gp_XY( move.X(),move.Y()), gp_XY_Added );
5082 gp_Pnt newPnt = s->Value( newUV.X(), newUV.Y());
5083 move = gp_Vec( XYZ((*link1)->_mediumNode), newPnt.Transformed(loc) );
5084 if ( SMDS_FacePosition* nPos =
5085 dynamic_cast< SMDS_FacePosition* >((*link1)->_mediumNode->GetPosition()))
5086 nPos->SetParameters( newUV.X(), newUV.Y() );
5088 if ( (XYZ((*link1)->node1()) - XYZ((*link1)->node2())).SquareModulus() <
5089 move.SquareMagnitude())
5091 gp_XY uv0 = faceHlp.GetNodeUV( face, (*link0)->_mediumNode, 0, &checkUV );
5092 gp_XY uv2 = faceHlp.GetNodeUV( face, (*link2)->_mediumNode, 0, &checkUV );
5093 MSG( "TOO LONG MOVE \t" <<
5094 "uv0: "<<uv0.X()<<", "<<uv0.Y()<<" \t" <<
5095 "uv2: "<<uv2.X()<<", "<<uv2.Y()<<" \t" <<
5096 "uvOld: "<<oldUV.X()<<", "<<oldUV.Y()<<" \t" <<
5097 "newUV: "<<newUV.X()<<", "<<newUV.Y()<<" \t");
5100 (*link1)->Move( move, /*sum=*/false, /*is2dFixed=*/true );
5102 MSG( "Move " << (*link1)->_mediumNode->GetID() << " following "
5103 << chain.front()->_mediumNode->GetID() <<"-"
5104 << chain.back ()->_mediumNode->GetID() <<
5105 " by " << move.Magnitude());
5107 } // loop on chains of links
5108 } // loop on 2 directions of propagation from quadrangle
5110 } // fix faces and/or volumes
5115 TIDSortedElemSet biQuadQuas, biQuadTris, triQuadHexa;
5116 const SMDS_MeshElement *biQuadQua, *triQuadHex;
5117 const bool toFixCentralNodes = ( myMesh->NbBiQuadQuadrangles() +
5118 myMesh->NbBiQuadTriangles() +
5119 myMesh->NbTriQuadraticHexas() );
5121 faceHlp.ToFixNodeParameters( true );
5123 for ( pLink = links.begin(); pLink != links.end(); ++pLink ) {
5124 if ( pLink->IsMoved() )
5126 gp_Pnt p = pLink->MiddlePnt() + pLink->Move();
5128 // put on surface nodes on FACE but moved in 3D (23050)
5129 if ( !pLink->IsFixedOnSurface() )
5131 faceHlp.SetSubShape( pLink->_mediumNode->getshapeId() );
5132 if ( faceHlp.GetSubShape().ShapeType() == TopAbs_FACE )
5134 const_cast<SMDS_MeshNode*>( pLink->_mediumNode )->setXYZ( p.X(), p.Y(), p.Z());
5135 p.Coord( distXYZ[1], distXYZ[2], distXYZ[3] );
5136 gp_XY uv( Precision::Infinite(), 0 );
5137 if ( faceHlp.CheckNodeUV( TopoDS::Face( faceHlp.GetSubShape() ), pLink->_mediumNode,
5138 uv, /*tol=*/pLink->Move().Modulus(), /*force=*/true, distXYZ ))
5139 p.SetCoord( distXYZ[1], distXYZ[2], distXYZ[3] );
5142 GetMeshDS()->MoveNode( pLink->_mediumNode, p.X(), p.Y(), p.Z());
5144 // collect bi-quadratic elements
5145 if ( toFixCentralNodes )
5147 biQuadQua = triQuadHex = 0;
5148 SMDS_ElemIteratorPtr eIt = pLink->_mediumNode->GetInverseElementIterator();
5149 while ( eIt->more() )
5151 const SMDS_MeshElement* e = eIt->next();
5152 switch( e->GetEntityType() ) {
5153 case SMDSEntity_BiQuad_Quadrangle: biQuadQuas.insert( e ); break;
5154 case SMDSEntity_BiQuad_Triangle: biQuadTris.insert( e ); break;
5155 case SMDSEntity_TriQuad_Hexa: triQuadHexa.insert( e ); break;
5162 // Fix positions of central nodes of bi-tri-quadratic elements
5164 // treat bi-quad quadrangles
5166 vector< const SMDS_MeshNode* > nodes( 9 );
5168 TIDSortedElemSet::iterator quadIt = biQuadQuas.begin();
5169 for ( ; quadIt != biQuadQuas.end(); ++quadIt )
5171 const SMDS_MeshElement* quad = *quadIt;
5174 nodes.assign( quad->begin_nodes(), quad->end_nodes() );
5176 TopoDS_Shape S = GetSubShapeByNode( nodes.back(), GetMeshDS() );
5177 if ( S.IsNull() || S.ShapeType() != TopAbs_FACE ) continue;
5178 const TopoDS_Face& F = TopoDS::Face( S );
5179 Handle( Geom_Surface ) surf = BRep_Tool::Surface( F, loc );
5180 const double tol = BRep_Tool::Tolerance( F );
5182 for ( int i = 0; i < 8; ++i )
5184 uv[ i ] = GetNodeUV( F, nodes[i], nodes[8], &checkUV );
5185 // as this method is used after mesh generation, UV of nodes is not
5186 // updated according to bending links, so we update
5187 if ( i > 3 && nodes[i]->GetPosition()->GetTypeOfPosition() == SMDS_TOP_FACE )
5188 CheckNodeUV( F, nodes[i], uv[ i ], 2*tol, /*force=*/true );
5190 AdjustByPeriod( F, uv, 8 ); // put uv[] within a period (IPAL52698)
5191 // move the central node
5192 gp_XY uvCent = calcTFI (0.5, 0.5, uv[0],uv[1],uv[2],uv[3],uv[4],uv[5],uv[6],uv[7] );
5193 gp_Pnt p = surf->Value( uvCent.X(), uvCent.Y() ).Transformed( loc );
5194 GetMeshDS()->MoveNode( nodes[8], p.X(), p.Y(), p.Z());
5198 // treat bi-quad triangles
5200 vector< const SMDS_MeshNode* > nodes;
5202 TIDSortedElemSet::iterator triIt = biQuadTris.begin();
5203 for ( ; triIt != biQuadTris.end(); ++triIt )
5205 const SMDS_MeshElement* tria = *triIt;
5207 const TopoDS_Shape& S = GetMeshDS()->IndexToShape( tria->getshapeId() );
5208 if ( S.IsNull() || S.ShapeType() != TopAbs_FACE ) continue;
5209 const TopoDS_Face& F = TopoDS::Face( S );
5210 Handle( Geom_Surface ) surf = BRep_Tool::Surface( F, loc );
5211 const double tol = BRep_Tool::Tolerance( F );
5214 nodes.assign( tria->begin_nodes(), tria->end_nodes() );
5216 bool uvOK = true, badTria = false;
5217 for ( int i = 0; i < 6; ++i )
5219 uv[ i ] = GetNodeUV( F, nodes[i], nodes[(i+1)%3], &uvOK );
5220 // as this method is used after mesh generation, UV of nodes is not
5221 // updated according to bending links, so we update
5222 if ( nodes[i]->GetPosition()->GetTypeOfPosition() == SMDS_TOP_FACE )
5223 CheckNodeUV( F, nodes[i], uv[ i ], 2*tol, /*force=*/true );
5226 // move the central node
5228 if ( !uvOK || badTria )
5230 p = ( SMESH_TNodeXYZ( nodes[3] ) +
5231 SMESH_TNodeXYZ( nodes[4] ) +
5232 SMESH_TNodeXYZ( nodes[5] )) / 3;
5236 AdjustByPeriod( F, uv, 6 ); // put uv[] within a period (IPAL52698)
5237 gp_XY uvCent = GetCenterUV( uv[0], uv[1], uv[2], uv[3], uv[4], uv[5], &badTria );
5238 p = surf->Value( uvCent.X(), uvCent.Y() ).Transformed( loc );
5240 GetMeshDS()->MoveNode( tria->GetNode(6), p.X(), p.Y(), p.Z() );
5244 // treat tri-quadratic hexahedra
5246 SMDS_VolumeTool volExp;
5247 TIDSortedElemSet::iterator hexIt = triQuadHexa.begin();
5248 for ( ; hexIt != triQuadHexa.end(); ++hexIt )
5250 volExp.Set( *hexIt, /*ignoreCentralNodes=*/false );
5252 // fix nodes central in sides
5253 for ( int iQuad = 0; iQuad < volExp.NbFaces(); ++iQuad )
5255 const SMDS_MeshNode** quadNodes = volExp.GetFaceNodes( iQuad );
5256 if ( quadNodes[8]->GetPosition()->GetTypeOfPosition() == SMDS_TOP_3DSPACE )
5258 gp_XYZ p = calcTFI( 0.5, 0.5,
5259 SMESH_TNodeXYZ( quadNodes[0] ), SMESH_TNodeXYZ( quadNodes[2] ),
5260 SMESH_TNodeXYZ( quadNodes[4] ), SMESH_TNodeXYZ( quadNodes[6] ),
5261 SMESH_TNodeXYZ( quadNodes[1] ), SMESH_TNodeXYZ( quadNodes[3] ),
5262 SMESH_TNodeXYZ( quadNodes[5] ), SMESH_TNodeXYZ( quadNodes[7] ));
5263 GetMeshDS()->MoveNode( quadNodes[8], p.X(), p.Y(), p.Z());
5267 // fix the volume central node
5268 vector<gp_XYZ> pointsOnShapes( SMESH_Block::ID_Shell );
5269 const SMDS_MeshNode** hexNodes = volExp.GetNodes();
5271 pointsOnShapes[ SMESH_Block::ID_V000 ] = SMESH_TNodeXYZ( hexNodes[ 0 ] );
5272 pointsOnShapes[ SMESH_Block::ID_V100 ] = SMESH_TNodeXYZ( hexNodes[ 3 ] );
5273 pointsOnShapes[ SMESH_Block::ID_V010 ] = SMESH_TNodeXYZ( hexNodes[ 1 ] );
5274 pointsOnShapes[ SMESH_Block::ID_V110 ] = SMESH_TNodeXYZ( hexNodes[ 2 ] );
5275 pointsOnShapes[ SMESH_Block::ID_V001 ] = SMESH_TNodeXYZ( hexNodes[ 4 ] );
5276 pointsOnShapes[ SMESH_Block::ID_V101 ] = SMESH_TNodeXYZ( hexNodes[ 7 ] );
5277 pointsOnShapes[ SMESH_Block::ID_V011 ] = SMESH_TNodeXYZ( hexNodes[ 5 ] );
5278 pointsOnShapes[ SMESH_Block::ID_V111 ] = SMESH_TNodeXYZ( hexNodes[ 6 ] );
5280 pointsOnShapes[ SMESH_Block::ID_Ex00 ] = SMESH_TNodeXYZ( hexNodes[ 11 ] );
5281 pointsOnShapes[ SMESH_Block::ID_Ex10 ] = SMESH_TNodeXYZ( hexNodes[ 9 ] );
5282 pointsOnShapes[ SMESH_Block::ID_E0y0 ] = SMESH_TNodeXYZ( hexNodes[ 8 ] );
5283 pointsOnShapes[ SMESH_Block::ID_E1y0 ] = SMESH_TNodeXYZ( hexNodes[ 10 ] );
5284 pointsOnShapes[ SMESH_Block::ID_Ex01 ] = SMESH_TNodeXYZ( hexNodes[ 15 ] );
5285 pointsOnShapes[ SMESH_Block::ID_Ex11 ] = SMESH_TNodeXYZ( hexNodes[ 13 ] );
5286 pointsOnShapes[ SMESH_Block::ID_E0y1 ] = SMESH_TNodeXYZ( hexNodes[ 12 ] );
5287 pointsOnShapes[ SMESH_Block::ID_E1y1 ] = SMESH_TNodeXYZ( hexNodes[ 14 ] );
5288 pointsOnShapes[ SMESH_Block::ID_E00z ] = SMESH_TNodeXYZ( hexNodes[ 16 ] );
5289 pointsOnShapes[ SMESH_Block::ID_E10z ] = SMESH_TNodeXYZ( hexNodes[ 19 ] );
5290 pointsOnShapes[ SMESH_Block::ID_E01z ] = SMESH_TNodeXYZ( hexNodes[ 17 ] );
5291 pointsOnShapes[ SMESH_Block::ID_E11z ] = SMESH_TNodeXYZ( hexNodes[ 18 ] );
5293 pointsOnShapes[ SMESH_Block::ID_Fxy0 ] = SMESH_TNodeXYZ( hexNodes[ 20 ] );
5294 pointsOnShapes[ SMESH_Block::ID_Fxy1 ] = SMESH_TNodeXYZ( hexNodes[ 25 ] );
5295 pointsOnShapes[ SMESH_Block::ID_Fx0z ] = SMESH_TNodeXYZ( hexNodes[ 21 ] );
5296 pointsOnShapes[ SMESH_Block::ID_Fx1z ] = SMESH_TNodeXYZ( hexNodes[ 23 ] );
5297 pointsOnShapes[ SMESH_Block::ID_F0yz ] = SMESH_TNodeXYZ( hexNodes[ 24 ] );
5298 pointsOnShapes[ SMESH_Block::ID_F1yz ] = SMESH_TNodeXYZ( hexNodes[ 22 ] );
5300 gp_XYZ nCenterParams(0.5, 0.5, 0.5), nCenterCoords;
5301 SMESH_Block::ShellPoint( nCenterParams, pointsOnShapes, nCenterCoords );
5302 GetMeshDS()->MoveNode( hexNodes[26],
5303 nCenterCoords.X(), nCenterCoords.Y(), nCenterCoords.Z());