1 // Copyright (C) 2007-2010 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.
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_FacePosition.hxx"
30 #include "SMDS_EdgePosition.hxx"
31 #include "SMDS_VolumeTool.hxx"
32 #include "SMESH_subMesh.hxx"
34 #include <BRepAdaptor_Surface.hxx>
35 #include <BRepTools.hxx>
36 #include <BRepTools_WireExplorer.hxx>
37 #include <BRep_Tool.hxx>
38 #include <Geom2d_Curve.hxx>
39 #include <GeomAPI_ProjectPointOnCurve.hxx>
40 #include <GeomAPI_ProjectPointOnSurf.hxx>
41 #include <Geom_Curve.hxx>
42 #include <Geom_Surface.hxx>
43 #include <ShapeAnalysis.hxx>
45 #include <TopExp_Explorer.hxx>
46 #include <TopTools_ListIteratorOfListOfShape.hxx>
47 #include <TopTools_MapIteratorOfMapOfShape.hxx>
48 #include <TopTools_MapOfShape.hxx>
51 #include <gp_Pnt2d.hxx>
52 #include <gp_Trsf.hxx>
54 #include <Standard_Failure.hxx>
55 #include <Standard_ErrorHandler.hxx>
57 #include <utilities.h>
63 #define RETURN_BAD_RESULT(msg) { MESSAGE(msg); return false; }
67 gp_XYZ XYZ(const SMDS_MeshNode* n) { return gp_XYZ(n->X(), n->Y(), n->Z()); }
69 enum { U_periodic = 1, V_periodic = 2 };
72 //================================================================================
76 //================================================================================
78 SMESH_MesherHelper::SMESH_MesherHelper(SMESH_Mesh& theMesh)
79 : myParIndex(0), myMesh(&theMesh), myShapeID(0), myCreateQuadratic(false)
81 myPar1[0] = myPar2[0] = myPar1[1] = myPar2[1] = 0;
82 mySetElemOnShape = ( ! myMesh->HasShapeToMesh() );
85 //=======================================================================
86 //function : ~SMESH_MesherHelper
88 //=======================================================================
90 SMESH_MesherHelper::~SMESH_MesherHelper()
92 TID2Projector::iterator i_proj = myFace2Projector.begin();
93 for ( ; i_proj != myFace2Projector.end(); ++i_proj )
94 delete i_proj->second;
97 //=======================================================================
98 //function : IsQuadraticSubMesh
99 //purpose : Check submesh for given shape: if all elements on this shape
100 // are quadratic, quadratic elements will be created.
101 // Also fill myTLinkNodeMap
102 //=======================================================================
104 bool SMESH_MesherHelper::IsQuadraticSubMesh(const TopoDS_Shape& aSh)
106 SMESHDS_Mesh* meshDS = GetMeshDS();
107 // we can create quadratic elements only if all elements
108 // created on subshapes of given shape are quadratic
109 // also we have to fill myTLinkNodeMap
110 myCreateQuadratic = true;
111 mySeamShapeIds.clear();
112 myDegenShapeIds.clear();
113 TopAbs_ShapeEnum subType( aSh.ShapeType()==TopAbs_FACE ? TopAbs_EDGE : TopAbs_FACE );
114 SMDSAbs_ElementType elemType( subType==TopAbs_FACE ? SMDSAbs_Face : SMDSAbs_Edge );
116 int nbOldLinks = myTLinkNodeMap.size();
118 TopExp_Explorer exp( aSh, subType );
119 for (; exp.More() && myCreateQuadratic; exp.Next()) {
120 if ( SMESHDS_SubMesh * subMesh = meshDS->MeshElements( exp.Current() )) {
121 if ( SMDS_ElemIteratorPtr it = subMesh->GetElements() ) {
123 const SMDS_MeshElement* e = it->next();
124 if ( e->GetType() != elemType || !e->IsQuadratic() ) {
125 myCreateQuadratic = false;
130 switch ( e->NbNodes() ) {
132 AddTLinkNode(e->GetNode(0),e->GetNode(1),e->GetNode(2)); break;
134 AddTLinkNode(e->GetNode(0),e->GetNode(1),e->GetNode(3));
135 AddTLinkNode(e->GetNode(1),e->GetNode(2),e->GetNode(4));
136 AddTLinkNode(e->GetNode(2),e->GetNode(0),e->GetNode(5)); break;
138 AddTLinkNode(e->GetNode(0),e->GetNode(1),e->GetNode(4));
139 AddTLinkNode(e->GetNode(1),e->GetNode(2),e->GetNode(5));
140 AddTLinkNode(e->GetNode(2),e->GetNode(3),e->GetNode(6));
141 AddTLinkNode(e->GetNode(3),e->GetNode(0),e->GetNode(7));
144 myCreateQuadratic = false;
153 if ( nbOldLinks == myTLinkNodeMap.size() )
154 myCreateQuadratic = false;
156 if(!myCreateQuadratic) {
157 myTLinkNodeMap.clear();
161 return myCreateQuadratic;
164 //=======================================================================
165 //function : SetSubShape
166 //purpose : Set geomerty to make elements on
167 //=======================================================================
169 void SMESH_MesherHelper::SetSubShape(const int aShID)
171 if ( aShID == myShapeID )
174 SetSubShape( GetMeshDS()->IndexToShape( aShID ));
176 SetSubShape( TopoDS_Shape() );
179 //=======================================================================
180 //function : SetSubShape
181 //purpose : Set geomerty to create elements on
182 //=======================================================================
184 void SMESH_MesherHelper::SetSubShape(const TopoDS_Shape& aSh)
186 if ( myShape.IsSame( aSh ))
190 mySeamShapeIds.clear();
191 myDegenShapeIds.clear();
193 if ( myShape.IsNull() ) {
197 SMESHDS_Mesh* meshDS = GetMeshDS();
198 myShapeID = meshDS->ShapeToIndex(aSh);
201 // treatment of periodic faces
202 for ( TopExp_Explorer eF( aSh, TopAbs_FACE ); eF.More(); eF.Next() )
204 const TopoDS_Face& face = TopoDS::Face( eF.Current() );
205 BRepAdaptor_Surface surface( face );
206 if ( surface.IsUPeriodic() || surface.IsVPeriodic() )
208 for (TopExp_Explorer exp( face, TopAbs_EDGE ); exp.More(); exp.Next())
210 // look for a seam edge
211 const TopoDS_Edge& edge = TopoDS::Edge( exp.Current() );
212 if ( BRep_Tool::IsClosed( edge, face )) {
213 // initialize myPar1, myPar2 and myParIndex
215 BRep_Tool::UVPoints( edge, face, uv1, uv2 );
216 if ( Abs( uv1.Coord(1) - uv2.Coord(1) ) < Abs( uv1.Coord(2) - uv2.Coord(2) ))
218 myParIndex |= U_periodic;
219 myPar1[0] = surface.FirstUParameter();
220 myPar2[0] = surface.LastUParameter();
223 myParIndex |= V_periodic;
224 myPar1[1] = surface.FirstVParameter();
225 myPar2[1] = surface.LastVParameter();
227 // store seam shape indices, negative if shape encounters twice
228 int edgeID = meshDS->ShapeToIndex( edge );
229 mySeamShapeIds.insert( IsSeamShape( edgeID ) ? -edgeID : edgeID );
230 for ( TopExp_Explorer v( edge, TopAbs_VERTEX ); v.More(); v.Next() ) {
231 int vertexID = meshDS->ShapeToIndex( v.Current() );
232 mySeamShapeIds.insert( IsSeamShape( vertexID ) ? -vertexID : vertexID );
236 // look for a degenerated edge
237 if ( BRep_Tool::Degenerated( edge )) {
238 myDegenShapeIds.insert( meshDS->ShapeToIndex( edge ));
239 for ( TopExp_Explorer v( edge, TopAbs_VERTEX ); v.More(); v.Next() )
240 myDegenShapeIds.insert( meshDS->ShapeToIndex( v.Current() ));
247 //=======================================================================
248 //function : GetNodeUVneedInFaceNode
249 //purpose : Check if inFaceNode argument is necessary for call GetNodeUV(F,..)
250 // Return true if the face is periodic.
251 // If F is Null, answer about subshape set through IsQuadraticSubMesh() or
253 //=======================================================================
255 bool SMESH_MesherHelper::GetNodeUVneedInFaceNode(const TopoDS_Face& F) const
257 if ( F.IsNull() ) return !mySeamShapeIds.empty();
259 if ( !F.IsNull() && !myShape.IsNull() && myShape.IsSame( F ))
260 return !mySeamShapeIds.empty();
263 Handle(Geom_Surface) aSurface = BRep_Tool::Surface( F,loc );
264 if ( !aSurface.IsNull() )
265 return ( aSurface->IsUPeriodic() || aSurface->IsVPeriodic() );
270 //=======================================================================
271 //function : IsMedium
273 //=======================================================================
275 bool SMESH_MesherHelper::IsMedium(const SMDS_MeshNode* node,
276 const SMDSAbs_ElementType typeToCheck)
278 return SMESH_MeshEditor::IsMedium( node, typeToCheck );
281 //=======================================================================
282 //function : GetSubShapeByNode
283 //purpose : Return support shape of a node
284 //=======================================================================
286 TopoDS_Shape SMESH_MesherHelper::GetSubShapeByNode(const SMDS_MeshNode* node,
287 SMESHDS_Mesh* meshDS)
289 int shapeID = node->GetPosition()->GetShapeId();
290 if ( 0 < shapeID && shapeID <= meshDS->MaxShapeIndex() )
291 return meshDS->IndexToShape( shapeID );
293 return TopoDS_Shape();
297 //=======================================================================
298 //function : AddTLinkNode
299 //purpose : add a link in my data structure
300 //=======================================================================
302 void SMESH_MesherHelper::AddTLinkNode(const SMDS_MeshNode* n1,
303 const SMDS_MeshNode* n2,
304 const SMDS_MeshNode* n12)
306 // add new record to map
307 SMESH_TLink link( n1, n2 );
308 myTLinkNodeMap.insert( make_pair(link,n12));
311 //=======================================================================
312 //function : GetUVOnSeam
313 //purpose : Select UV on either of 2 pcurves of a seam edge, closest to the given UV
314 //=======================================================================
316 gp_Pnt2d SMESH_MesherHelper::GetUVOnSeam( const gp_Pnt2d& uv1, const gp_Pnt2d& uv2 ) const
318 gp_Pnt2d result = uv1;
319 for ( int i = U_periodic; i <= V_periodic ; ++i )
321 if ( myParIndex & i )
323 double p1 = uv1.Coord( i );
324 double dp1 = Abs( p1-myPar1[i-1]), dp2 = Abs( p1-myPar2[i-1]);
325 if ( myParIndex == i ||
326 dp1 < ( myPar2[i-1] - myPar2[i-1] ) / 100. ||
327 dp2 < ( myPar2[i-1] - myPar2[i-1] ) / 100. )
329 double p2 = uv2.Coord( i );
330 double p1Alt = ( dp1 < dp2 ) ? myPar2[i-1] : myPar1[i-1];
331 if ( Abs( p2 - p1 ) > Abs( p2 - p1Alt ))
332 result.SetCoord( i, p1Alt );
339 //=======================================================================
340 //function : GetNodeUV
341 //purpose : Return node UV on face
342 //=======================================================================
344 gp_XY SMESH_MesherHelper::GetNodeUV(const TopoDS_Face& F,
345 const SMDS_MeshNode* n,
346 const SMDS_MeshNode* n2,
349 gp_Pnt2d uv( Precision::Infinite(), Precision::Infinite() );
350 const SMDS_PositionPtr Pos = n->GetPosition();
352 if(Pos->GetTypeOfPosition()==SMDS_TOP_FACE)
354 // node has position on face
355 const SMDS_FacePosition* fpos =
356 static_cast<const SMDS_FacePosition*>(n->GetPosition());
357 uv.SetCoord(fpos->GetUParameter(),fpos->GetVParameter());
359 uvOK = CheckNodeUV( F, n, uv.ChangeCoord(), BRep_Tool::Tolerance( F ));
361 else if(Pos->GetTypeOfPosition()==SMDS_TOP_EDGE)
363 // node has position on edge => it is needed to find
364 // corresponding edge from face, get pcurve for this
365 // edge and retrieve value from this pcurve
366 const SMDS_EdgePosition* epos =
367 static_cast<const SMDS_EdgePosition*>(n->GetPosition());
368 int edgeID = Pos->GetShapeId();
369 TopoDS_Edge E = TopoDS::Edge(GetMeshDS()->IndexToShape(edgeID));
370 double f, l, u = epos->GetUParameter();
371 Handle(Geom2d_Curve) C2d = BRep_Tool::CurveOnSurface(E, F, f, l);
372 bool validU = ( f < u && u < l );
374 uv = C2d->Value( u );
377 if ( check || !validU )
378 uvOK = CheckNodeUV( F, n, uv.ChangeCoord(), BRep_Tool::Tolerance( E ),/*force=*/ !validU );
380 // for a node on a seam edge select one of UVs on 2 pcurves
381 if ( n2 && IsSeamShape( edgeID ) )
383 uv = GetUVOnSeam( uv, GetNodeUV( F, n2, 0 ));
386 { // adjust uv to period
388 Handle(Geom_Surface) S = BRep_Tool::Surface(F,loc);
389 Standard_Boolean isUPeriodic = S->IsUPeriodic();
390 Standard_Boolean isVPeriodic = S->IsVPeriodic();
391 if ( isUPeriodic || isVPeriodic ) {
392 Standard_Real UF,UL,VF,VL;
393 S->Bounds(UF,UL,VF,VL);
395 uv.SetX( uv.X() + ShapeAnalysis::AdjustToPeriod(uv.X(),UF,UL));
397 uv.SetY( uv.Y() + ShapeAnalysis::AdjustToPeriod(uv.Y(),VF,VL));
401 else if(Pos->GetTypeOfPosition()==SMDS_TOP_VERTEX)
403 if ( int vertexID = n->GetPosition()->GetShapeId() ) {
404 const TopoDS_Vertex& V = TopoDS::Vertex(GetMeshDS()->IndexToShape(vertexID));
406 uv = BRep_Tool::Parameters( V, F );
409 catch (Standard_Failure& exc) {
412 for ( TopExp_Explorer vert(F,TopAbs_VERTEX); !uvOK && vert.More(); vert.Next() )
413 uvOK = ( V == vert.Current() );
416 MESSAGE ( "SMESH_MesherHelper::GetNodeUV(); Vertex " << vertexID
417 << " not in face " << GetMeshDS()->ShapeToIndex( F ) );
419 // get UV of a vertex closest to the node
421 gp_Pnt pn = XYZ( n );
422 for ( TopExp_Explorer vert(F,TopAbs_VERTEX); !uvOK && vert.More(); vert.Next() ) {
423 TopoDS_Vertex curV = TopoDS::Vertex( vert.Current() );
424 gp_Pnt p = BRep_Tool::Pnt( curV );
425 double curDist = p.SquareDistance( pn );
426 if ( curDist < dist ) {
428 uv = BRep_Tool::Parameters( curV, F );
429 uvOK = ( dist < DBL_MIN );
435 TopTools_ListIteratorOfListOfShape it( myMesh->GetAncestors( V ));
436 for ( ; it.More(); it.Next() ) {
437 if ( it.Value().ShapeType() == TopAbs_EDGE ) {
438 const TopoDS_Edge & edge = TopoDS::Edge( it.Value() );
440 Handle(Geom2d_Curve) C2d = BRep_Tool::CurveOnSurface(edge, F, f, l);
441 if ( !C2d.IsNull() ) {
442 double u = ( V == TopExp::FirstVertex( edge ) ) ? f : l;
443 uv = C2d->Value( u );
451 if ( n2 && IsSeamShape( vertexID ) )
452 uv = GetUVOnSeam( uv, GetNodeUV( F, n2, 0 ));
462 //=======================================================================
463 //function : CheckNodeUV
464 //purpose : Check and fix node UV on a face
465 //=======================================================================
467 bool SMESH_MesherHelper::CheckNodeUV(const TopoDS_Face& F,
468 const SMDS_MeshNode* n,
471 const bool force) const
473 if ( force || !myOkNodePosShapes.count( n->GetPosition()->GetShapeId() ))
475 // check that uv is correct
477 Handle(Geom_Surface) surface = BRep_Tool::Surface( F,loc );
478 gp_Pnt nodePnt = XYZ( n );
479 if ( !loc.IsIdentity() ) nodePnt.Transform( loc.Transformation().Inverted() );
480 if ( Precision::IsInfinite( uv.X() ) ||
481 Precision::IsInfinite( uv.Y() ) ||
482 nodePnt.Distance( surface->Value( uv.X(), uv.Y() )) > tol )
484 // uv incorrect, project the node to surface
485 GeomAPI_ProjectPointOnSurf& projector = GetProjector( F, loc, tol );
486 projector.Perform( nodePnt );
487 if ( !projector.IsDone() || projector.NbPoints() < 1 )
489 MESSAGE( "SMESH_MesherHelper::CheckNodeUV() failed to project" );
492 Quantity_Parameter U,V;
493 projector.LowerDistanceParameters(U,V);
494 if ( nodePnt.Distance( surface->Value( U, V )) > tol )
496 MESSAGE( "SMESH_MesherHelper::CheckNodeUV(), invalid projection" );
501 else if ( uv.Modulus() > numeric_limits<double>::min() )
503 ((SMESH_MesherHelper*) this)->myOkNodePosShapes.insert( n->GetPosition()->GetShapeId() );
509 //=======================================================================
510 //function : GetProjector
511 //purpose : Return projector intitialized by given face without location, which is returned
512 //=======================================================================
514 GeomAPI_ProjectPointOnSurf& SMESH_MesherHelper::GetProjector(const TopoDS_Face& F,
515 TopLoc_Location& loc,
518 Handle(Geom_Surface) surface = BRep_Tool::Surface( F,loc );
519 int faceID = GetMeshDS()->ShapeToIndex( F );
520 TID2Projector& i2proj = const_cast< TID2Projector&>( myFace2Projector );
521 TID2Projector::iterator i_proj = i2proj.find( faceID );
522 if ( i_proj == i2proj.end() )
524 if ( tol == 0 ) tol = BRep_Tool::Tolerance( F );
525 double U1, U2, V1, V2;
526 surface->Bounds(U1, U2, V1, V2);
527 GeomAPI_ProjectPointOnSurf* proj = new GeomAPI_ProjectPointOnSurf();
528 proj->Init( surface, U1, U2, V1, V2, tol );
529 i_proj = i2proj.insert( make_pair( faceID, proj )).first;
531 return *( i_proj->second );
536 gp_XY AverageUV(const gp_XY& uv1, const gp_XY& uv2) { return ( uv1 + uv2 ) / 2.; }
537 gp_XY_FunPtr(Added); // define gp_XY_Added pointer to function calling gp_XY::Added(gp_XY)
538 gp_XY_FunPtr(Subtracted);
541 //=======================================================================
542 //function : applyIn2D
543 //purpose : Perform given operation on two 2d points in parameric space of given surface.
544 // It takes into account period of the surface. Use gp_XY_FunPtr macro
545 // to easily define pointer to function of gp_XY class.
546 //=======================================================================
548 gp_XY SMESH_MesherHelper::applyIn2D(const Handle(Geom_Surface)& surface,
552 const bool resultInPeriod)
554 Standard_Boolean isUPeriodic = surface.IsNull() ? false : surface->IsUPeriodic();
555 Standard_Boolean isVPeriodic = surface.IsNull() ? false : surface->IsVPeriodic();
556 if ( !isUPeriodic && !isVPeriodic )
559 // move uv2 not far than half-period from uv1
561 uv2.X()+(isUPeriodic ? ShapeAnalysis::AdjustByPeriod(uv2.X(),uv1.X(),surface->UPeriod()) :0);
563 uv2.Y()+(isVPeriodic ? ShapeAnalysis::AdjustByPeriod(uv2.Y(),uv1.Y(),surface->VPeriod()) :0);
566 gp_XY res = fun( uv1, gp_XY(u2,v2) );
568 // move result within period
569 if ( resultInPeriod )
571 Standard_Real UF,UL,VF,VL;
572 surface->Bounds(UF,UL,VF,VL);
574 res.SetX( res.X() + ShapeAnalysis::AdjustToPeriod(res.X(),UF,UL));
576 res.SetY( res.Y() + ShapeAnalysis::AdjustToPeriod(res.Y(),VF,VL));
581 //=======================================================================
582 //function : GetMiddleUV
583 //purpose : Return middle UV taking in account surface period
584 //=======================================================================
586 gp_XY SMESH_MesherHelper::GetMiddleUV(const Handle(Geom_Surface)& surface,
590 return applyIn2D( surface, p1, p2, & AverageUV );
593 //=======================================================================
594 //function : GetNodeU
595 //purpose : Return node U on edge
596 //=======================================================================
598 double SMESH_MesherHelper::GetNodeU(const TopoDS_Edge& E,
599 const SMDS_MeshNode* n,
600 const SMDS_MeshNode* inEdgeNode,
604 const SMDS_PositionPtr pos = n->GetPosition();
605 if ( pos->GetTypeOfPosition()==SMDS_TOP_EDGE )
607 const SMDS_EdgePosition* epos = static_cast<const SMDS_EdgePosition*>( pos );
608 param = epos->GetUParameter();
610 else if( pos->GetTypeOfPosition() == SMDS_TOP_VERTEX )
612 if ( inEdgeNode && TopExp::FirstVertex( E ).IsSame( TopExp::LastVertex( E ))) // issue 0020128
615 BRep_Tool::Range( E, f,l );
616 double uInEdge = GetNodeU( E, inEdgeNode );
617 param = ( fabs( uInEdge - f ) < fabs( l - uInEdge )) ? f : l;
621 SMESHDS_Mesh * meshDS = GetMeshDS();
622 int vertexID = pos->GetShapeId();
623 const TopoDS_Vertex& V = TopoDS::Vertex(meshDS->IndexToShape(vertexID));
624 param = BRep_Tool::Parameter( V, E );
629 double tol = BRep_Tool::Tolerance( E );
630 double f,l; BRep_Tool::Range( E, f,l );
631 bool force = ( param < f-tol || param > l+tol );
632 if ( !force && pos->GetTypeOfPosition()==SMDS_TOP_EDGE )
633 force = ( GetMeshDS()->ShapeToIndex( E ) != pos->GetShapeId() );
635 *check = CheckNodeU( E, n, param, tol, force );
640 //=======================================================================
641 //function : CheckNodeU
642 //purpose : Check and fix node U on an edge
643 // Return false if U is bad and could not be fixed
644 //=======================================================================
646 bool SMESH_MesherHelper::CheckNodeU(const TopoDS_Edge& E,
647 const SMDS_MeshNode* n,
650 const bool force) const
652 if ( force || !myOkNodePosShapes.count( n->GetPosition()->GetShapeId() ))
654 // check that u is correct
655 TopLoc_Location loc; double f,l;
656 Handle(Geom_Curve) curve = BRep_Tool::Curve( E,loc,f,l );
657 if ( curve.IsNull() ) // degenerated edge
659 if ( u+tol < f || u-tol > l )
661 double r = Max( 0.5, 1 - tol*n->GetID()); // to get a unique u on edge
667 gp_Pnt nodePnt = SMESH_MeshEditor::TNodeXYZ( n );
668 if ( !loc.IsIdentity() ) nodePnt.Transform( loc.Transformation().Inverted() );
669 if ( nodePnt.Distance( curve->Value( u )) > tol )
671 // u incorrect, project the node to the curve
672 GeomAPI_ProjectPointOnCurve projector( nodePnt, curve, f, l );
673 if ( projector.NbPoints() < 1 )
675 MESSAGE( "SMESH_MesherHelper::CheckNodeU() failed to project" );
678 Quantity_Parameter U = projector.LowerDistanceParameter();
679 if ( nodePnt.Distance( curve->Value( U )) > tol )
681 MESSAGE( "SMESH_MesherHelper::CheckNodeU(), invalid projection" );
686 else if ( fabs( u ) > numeric_limits<double>::min() )
688 ((SMESH_MesherHelper*) this)->myOkNodePosShapes.insert( n->GetPosition()->GetShapeId() );
690 if (( u < f-tol || u > l+tol ) && force )
692 // node is on vertex but is set on periodic but trimmed edge (issue 0020890)
695 // do not use IsPeriodic() as Geom_TrimmedCurve::IsPeriodic () returns false
696 double period = curve->Period();
697 u = ( u < f ) ? u + period : u - period;
699 catch (Standard_Failure& exc)
709 //=======================================================================
710 //function : GetMediumNode
711 //purpose : Return existing or create new medium nodes between given ones
712 //=======================================================================
714 const SMDS_MeshNode* SMESH_MesherHelper::GetMediumNode(const SMDS_MeshNode* n1,
715 const SMDS_MeshNode* n2,
718 // Find existing node
720 SMESH_TLink link(n1,n2);
721 ItTLinkNode itLN = myTLinkNodeMap.find( link );
722 if ( itLN != myTLinkNodeMap.end() ) {
723 return (*itLN).second;
726 // Create medium node
729 SMESHDS_Mesh* meshDS = GetMeshDS();
731 // get type of shape for the new medium node
732 int faceID = -1, edgeID = -1;
733 const SMDS_PositionPtr Pos1 = n1->GetPosition();
734 const SMDS_PositionPtr Pos2 = n2->GetPosition();
736 if( myShape.IsNull() )
738 if( Pos1->GetTypeOfPosition()==SMDS_TOP_FACE ) {
739 faceID = Pos1->GetShapeId();
741 else if( Pos2->GetTypeOfPosition()==SMDS_TOP_FACE ) {
742 faceID = Pos2->GetShapeId();
745 if( Pos1->GetTypeOfPosition()==SMDS_TOP_EDGE ) {
746 edgeID = Pos1->GetShapeId();
748 if( Pos2->GetTypeOfPosition()==SMDS_TOP_EDGE ) {
749 edgeID = Pos2->GetShapeId();
752 // get positions of the given nodes on shapes
753 TopoDS_Edge E; double u [2];
754 TopoDS_Face F; gp_XY uv[2];
755 bool uvOK[2] = { false, false };
756 TopAbs_ShapeEnum shapeType = myShape.IsNull() ? TopAbs_SHAPE : myShape.ShapeType();
757 if ( faceID>0 || shapeType == TopAbs_FACE)
759 if( myShape.IsNull() )
760 F = TopoDS::Face(meshDS->IndexToShape(faceID));
762 F = TopoDS::Face(myShape);
765 uv[0] = GetNodeUV(F,n1,n2, force3d ? 0 : &uvOK[0]);
766 uv[1] = GetNodeUV(F,n2,n1, force3d ? 0 : &uvOK[1]);
768 else if (edgeID>0 || shapeType == TopAbs_EDGE)
770 if( myShape.IsNull() )
771 E = TopoDS::Edge(meshDS->IndexToShape(edgeID));
773 E = TopoDS::Edge(myShape);
776 u[0] = GetNodeU(E,n1,n2, force3d ? 0 : &uvOK[0]);
777 u[1] = GetNodeU(E,n2,n1, force3d ? 0 : &uvOK[1]);
781 // we try to create medium node using UV parameters of
782 // nodes, else - medium between corresponding 3d points
785 if ( uvOK[0] && uvOK[1] )
787 if ( IsDegenShape( Pos1->GetShapeId() ))
788 if ( myParIndex & U_periodic ) uv[0].SetCoord( 1, uv[1].Coord( 1 ));
789 else uv[0].SetCoord( 2, uv[1].Coord( 2 ));
790 else if ( IsDegenShape( Pos2->GetShapeId() ))
791 if ( myParIndex & U_periodic ) uv[1].SetCoord( 1, uv[0].Coord( 1 ));
792 else uv[1].SetCoord( 2, uv[0].Coord( 2 ));
795 Handle(Geom_Surface) S = BRep_Tool::Surface(F,loc);
796 gp_XY UV = GetMiddleUV( S, uv[0], uv[1] );
797 gp_Pnt P = S->Value( UV.X(), UV.Y() ).Transformed(loc);
798 n12 = meshDS->AddNode(P.X(), P.Y(), P.Z());
799 meshDS->SetNodeOnFace(n12, faceID, UV.X(), UV.Y());
800 myTLinkNodeMap.insert(make_pair(link,n12));
804 else if ( !E.IsNull() )
807 Handle(Geom_Curve) C = BRep_Tool::Curve(E, f, l);
810 Standard_Boolean isPeriodic = C->IsPeriodic();
813 Standard_Real Period = C->Period();
814 Standard_Real p = u[1]+ShapeAnalysis::AdjustByPeriod(u[1],u[0],Period);
815 Standard_Real pmid = (u[0]+p)/2.;
816 U = pmid+ShapeAnalysis::AdjustToPeriod(pmid,C->FirstParameter(),C->LastParameter());
821 gp_Pnt P = C->Value( U );
822 n12 = meshDS->AddNode(P.X(), P.Y(), P.Z());
823 meshDS->SetNodeOnEdge(n12, edgeID, U);
824 myTLinkNodeMap.insert(make_pair(link,n12));
830 double x = ( n1->X() + n2->X() )/2.;
831 double y = ( n1->Y() + n2->Y() )/2.;
832 double z = ( n1->Z() + n2->Z() )/2.;
833 n12 = meshDS->AddNode(x,y,z);
836 gp_XY UV = ( uv[0] + uv[1] ) / 2.;
837 CheckNodeUV( F, n12, UV, BRep_Tool::Tolerance( F ), /*force=*/true);
838 meshDS->SetNodeOnFace(n12, faceID, UV.X(), UV.Y() );
840 else if ( !E.IsNull() )
842 double U = ( u[0] + u[1] ) / 2.;
843 CheckNodeU( E, n12, U, BRep_Tool::Tolerance( E ), /*force=*/true);
844 meshDS->SetNodeOnEdge(n12, edgeID, U);
846 else if ( myShapeID > 1 )
848 meshDS->SetNodeInVolume(n12, myShapeID);
850 myTLinkNodeMap.insert( make_pair( link, n12 ));
854 //=======================================================================
856 //purpose : Creates a node
857 //=======================================================================
859 SMDS_MeshNode* SMESH_MesherHelper::AddNode(double x, double y, double z, int ID)
861 SMESHDS_Mesh * meshDS = GetMeshDS();
862 SMDS_MeshNode* node = 0;
864 node = meshDS->AddNodeWithID( x, y, z, ID );
866 node = meshDS->AddNode( x, y, z );
867 if ( mySetElemOnShape && myShapeID > 0 ) {
868 switch ( myShape.ShapeType() ) {
869 case TopAbs_SOLID: meshDS->SetNodeInVolume( node, myShapeID); break;
870 case TopAbs_SHELL: meshDS->SetNodeInVolume( node, myShapeID); break;
871 case TopAbs_FACE: meshDS->SetNodeOnFace( node, myShapeID); break;
872 case TopAbs_EDGE: meshDS->SetNodeOnEdge( node, myShapeID); break;
873 case TopAbs_VERTEX: meshDS->SetNodeOnVertex( node, myShapeID); break;
880 //=======================================================================
882 //purpose : Creates quadratic or linear edge
883 //=======================================================================
885 SMDS_MeshEdge* SMESH_MesherHelper::AddEdge(const SMDS_MeshNode* n1,
886 const SMDS_MeshNode* n2,
890 SMESHDS_Mesh * meshDS = GetMeshDS();
892 SMDS_MeshEdge* edge = 0;
893 if (myCreateQuadratic) {
894 const SMDS_MeshNode* n12 = GetMediumNode(n1,n2,force3d);
896 edge = meshDS->AddEdgeWithID(n1, n2, n12, id);
898 edge = meshDS->AddEdge(n1, n2, n12);
902 edge = meshDS->AddEdgeWithID(n1, n2, id);
904 edge = meshDS->AddEdge(n1, n2);
907 if ( mySetElemOnShape && myShapeID > 0 )
908 meshDS->SetMeshElementOnShape( edge, myShapeID );
913 //=======================================================================
915 //purpose : Creates quadratic or linear triangle
916 //=======================================================================
918 SMDS_MeshFace* SMESH_MesherHelper::AddFace(const SMDS_MeshNode* n1,
919 const SMDS_MeshNode* n2,
920 const SMDS_MeshNode* n3,
924 SMESHDS_Mesh * meshDS = GetMeshDS();
925 SMDS_MeshFace* elem = 0;
927 if( n1==n2 || n2==n3 || n3==n1 )
930 if(!myCreateQuadratic) {
932 elem = meshDS->AddFaceWithID(n1, n2, n3, id);
934 elem = meshDS->AddFace(n1, n2, n3);
937 const SMDS_MeshNode* n12 = GetMediumNode(n1,n2,force3d);
938 const SMDS_MeshNode* n23 = GetMediumNode(n2,n3,force3d);
939 const SMDS_MeshNode* n31 = GetMediumNode(n3,n1,force3d);
942 elem = meshDS->AddFaceWithID(n1, n2, n3, n12, n23, n31, id);
944 elem = meshDS->AddFace(n1, n2, n3, n12, n23, n31);
946 if ( mySetElemOnShape && myShapeID > 0 )
947 meshDS->SetMeshElementOnShape( elem, myShapeID );
952 //=======================================================================
954 //purpose : Creates quadratic or linear quadrangle
955 //=======================================================================
957 SMDS_MeshFace* SMESH_MesherHelper::AddFace(const SMDS_MeshNode* n1,
958 const SMDS_MeshNode* n2,
959 const SMDS_MeshNode* n3,
960 const SMDS_MeshNode* n4,
964 SMESHDS_Mesh * meshDS = GetMeshDS();
965 SMDS_MeshFace* elem = 0;
968 return AddFace(n1,n3,n4,id,force3d);
971 return AddFace(n1,n2,n4,id,force3d);
974 return AddFace(n1,n2,n3,id,force3d);
977 return AddFace(n1,n2,n4,id,force3d);
980 return AddFace(n1,n2,n3,id,force3d);
983 return AddFace(n1,n2,n3,id,force3d);
986 if(!myCreateQuadratic) {
988 elem = meshDS->AddFaceWithID(n1, n2, n3, n4, id);
990 elem = meshDS->AddFace(n1, n2, n3, n4);
993 const SMDS_MeshNode* n12 = GetMediumNode(n1,n2,force3d);
994 const SMDS_MeshNode* n23 = GetMediumNode(n2,n3,force3d);
995 const SMDS_MeshNode* n34 = GetMediumNode(n3,n4,force3d);
996 const SMDS_MeshNode* n41 = GetMediumNode(n4,n1,force3d);
999 elem = meshDS->AddFaceWithID(n1, n2, n3, n4, n12, n23, n34, n41, id);
1001 elem = meshDS->AddFace(n1, n2, n3, n4, n12, n23, n34, n41);
1003 if ( mySetElemOnShape && myShapeID > 0 )
1004 meshDS->SetMeshElementOnShape( elem, myShapeID );
1009 //=======================================================================
1010 //function : AddVolume
1011 //purpose : Creates quadratic or linear prism
1012 //=======================================================================
1014 SMDS_MeshVolume* SMESH_MesherHelper::AddVolume(const SMDS_MeshNode* n1,
1015 const SMDS_MeshNode* n2,
1016 const SMDS_MeshNode* n3,
1017 const SMDS_MeshNode* n4,
1018 const SMDS_MeshNode* n5,
1019 const SMDS_MeshNode* n6,
1023 SMESHDS_Mesh * meshDS = GetMeshDS();
1024 SMDS_MeshVolume* elem = 0;
1025 if(!myCreateQuadratic) {
1027 elem = meshDS->AddVolumeWithID(n1, n2, n3, n4, n5, n6, id);
1029 elem = meshDS->AddVolume(n1, n2, n3, n4, n5, n6);
1032 const SMDS_MeshNode* n12 = GetMediumNode(n1,n2,force3d);
1033 const SMDS_MeshNode* n23 = GetMediumNode(n2,n3,force3d);
1034 const SMDS_MeshNode* n31 = GetMediumNode(n3,n1,force3d);
1036 const SMDS_MeshNode* n45 = GetMediumNode(n4,n5,force3d);
1037 const SMDS_MeshNode* n56 = GetMediumNode(n5,n6,force3d);
1038 const SMDS_MeshNode* n64 = GetMediumNode(n6,n4,force3d);
1040 const SMDS_MeshNode* n14 = GetMediumNode(n1,n4,force3d);
1041 const SMDS_MeshNode* n25 = GetMediumNode(n2,n5,force3d);
1042 const SMDS_MeshNode* n36 = GetMediumNode(n3,n6,force3d);
1045 elem = meshDS->AddVolumeWithID(n1, n2, n3, n4, n5, n6,
1046 n12, n23, n31, n45, n56, n64, n14, n25, n36, id);
1048 elem = meshDS->AddVolume(n1, n2, n3, n4, n5, n6,
1049 n12, n23, n31, n45, n56, n64, n14, n25, n36);
1051 if ( mySetElemOnShape && myShapeID > 0 )
1052 meshDS->SetMeshElementOnShape( elem, myShapeID );
1057 //=======================================================================
1058 //function : AddVolume
1059 //purpose : Creates quadratic or linear tetrahedron
1060 //=======================================================================
1062 SMDS_MeshVolume* SMESH_MesherHelper::AddVolume(const SMDS_MeshNode* n1,
1063 const SMDS_MeshNode* n2,
1064 const SMDS_MeshNode* n3,
1065 const SMDS_MeshNode* n4,
1069 SMESHDS_Mesh * meshDS = GetMeshDS();
1070 SMDS_MeshVolume* elem = 0;
1071 if(!myCreateQuadratic) {
1073 elem = meshDS->AddVolumeWithID(n1, n2, n3, n4, id);
1075 elem = meshDS->AddVolume(n1, n2, n3, n4);
1078 const SMDS_MeshNode* n12 = GetMediumNode(n1,n2,force3d);
1079 const SMDS_MeshNode* n23 = GetMediumNode(n2,n3,force3d);
1080 const SMDS_MeshNode* n31 = GetMediumNode(n3,n1,force3d);
1082 const SMDS_MeshNode* n14 = GetMediumNode(n1,n4,force3d);
1083 const SMDS_MeshNode* n24 = GetMediumNode(n2,n4,force3d);
1084 const SMDS_MeshNode* n34 = GetMediumNode(n3,n4,force3d);
1087 elem = meshDS->AddVolumeWithID(n1, n2, n3, n4, n12, n23, n31, n14, n24, n34, id);
1089 elem = meshDS->AddVolume(n1, n2, n3, n4, n12, n23, n31, n14, n24, n34);
1091 if ( mySetElemOnShape && myShapeID > 0 )
1092 meshDS->SetMeshElementOnShape( elem, myShapeID );
1097 //=======================================================================
1098 //function : AddVolume
1099 //purpose : Creates quadratic or linear pyramid
1100 //=======================================================================
1102 SMDS_MeshVolume* SMESH_MesherHelper::AddVolume(const SMDS_MeshNode* n1,
1103 const SMDS_MeshNode* n2,
1104 const SMDS_MeshNode* n3,
1105 const SMDS_MeshNode* n4,
1106 const SMDS_MeshNode* n5,
1110 SMDS_MeshVolume* elem = 0;
1111 if(!myCreateQuadratic) {
1113 elem = GetMeshDS()->AddVolumeWithID(n1, n2, n3, n4, n5, id);
1115 elem = GetMeshDS()->AddVolume(n1, n2, n3, n4, n5);
1118 const SMDS_MeshNode* n12 = GetMediumNode(n1,n2,force3d);
1119 const SMDS_MeshNode* n23 = GetMediumNode(n2,n3,force3d);
1120 const SMDS_MeshNode* n34 = GetMediumNode(n3,n4,force3d);
1121 const SMDS_MeshNode* n41 = GetMediumNode(n4,n1,force3d);
1123 const SMDS_MeshNode* n15 = GetMediumNode(n1,n5,force3d);
1124 const SMDS_MeshNode* n25 = GetMediumNode(n2,n5,force3d);
1125 const SMDS_MeshNode* n35 = GetMediumNode(n3,n5,force3d);
1126 const SMDS_MeshNode* n45 = GetMediumNode(n4,n5,force3d);
1129 elem = GetMeshDS()->AddVolumeWithID ( n1, n2, n3, n4, n5,
1134 elem = GetMeshDS()->AddVolume( n1, n2, n3, n4, n5,
1136 n15, n25, n35, n45);
1138 if ( mySetElemOnShape && myShapeID > 0 )
1139 GetMeshDS()->SetMeshElementOnShape( elem, myShapeID );
1144 //=======================================================================
1145 //function : AddVolume
1146 //purpose : Creates quadratic or linear hexahedron
1147 //=======================================================================
1149 SMDS_MeshVolume* SMESH_MesherHelper::AddVolume(const SMDS_MeshNode* n1,
1150 const SMDS_MeshNode* n2,
1151 const SMDS_MeshNode* n3,
1152 const SMDS_MeshNode* n4,
1153 const SMDS_MeshNode* n5,
1154 const SMDS_MeshNode* n6,
1155 const SMDS_MeshNode* n7,
1156 const SMDS_MeshNode* n8,
1160 SMESHDS_Mesh * meshDS = GetMeshDS();
1161 SMDS_MeshVolume* elem = 0;
1162 if(!myCreateQuadratic) {
1164 elem = meshDS->AddVolumeWithID(n1, n2, n3, n4, n5, n6, n7, n8, id);
1166 elem = meshDS->AddVolume(n1, n2, n3, n4, n5, n6, n7, n8);
1169 const SMDS_MeshNode* n12 = GetMediumNode(n1,n2,force3d);
1170 const SMDS_MeshNode* n23 = GetMediumNode(n2,n3,force3d);
1171 const SMDS_MeshNode* n34 = GetMediumNode(n3,n4,force3d);
1172 const SMDS_MeshNode* n41 = GetMediumNode(n4,n1,force3d);
1174 const SMDS_MeshNode* n56 = GetMediumNode(n5,n6,force3d);
1175 const SMDS_MeshNode* n67 = GetMediumNode(n6,n7,force3d);
1176 const SMDS_MeshNode* n78 = GetMediumNode(n7,n8,force3d);
1177 const SMDS_MeshNode* n85 = GetMediumNode(n8,n5,force3d);
1179 const SMDS_MeshNode* n15 = GetMediumNode(n1,n5,force3d);
1180 const SMDS_MeshNode* n26 = GetMediumNode(n2,n6,force3d);
1181 const SMDS_MeshNode* n37 = GetMediumNode(n3,n7,force3d);
1182 const SMDS_MeshNode* n48 = GetMediumNode(n4,n8,force3d);
1185 elem = meshDS->AddVolumeWithID(n1, n2, n3, n4, n5, n6, n7, n8,
1186 n12, n23, n34, n41, n56, n67,
1187 n78, n85, n15, n26, n37, n48, id);
1189 elem = meshDS->AddVolume(n1, n2, n3, n4, n5, n6, n7, n8,
1190 n12, n23, n34, n41, n56, n67,
1191 n78, n85, n15, n26, n37, n48);
1193 if ( mySetElemOnShape && myShapeID > 0 )
1194 meshDS->SetMeshElementOnShape( elem, myShapeID );
1199 //=======================================================================
1200 //function : LoadNodeColumns
1201 //purpose : Load nodes bound to face into a map of node columns
1202 //=======================================================================
1204 bool SMESH_MesherHelper::LoadNodeColumns(TParam2ColumnMap & theParam2ColumnMap,
1205 const TopoDS_Face& theFace,
1206 const TopoDS_Edge& theBaseEdge,
1207 SMESHDS_Mesh* theMesh)
1209 SMESHDS_SubMesh* faceSubMesh = theMesh->MeshElements( theFace );
1210 if ( !faceSubMesh || faceSubMesh->NbElements() == 0 )
1213 // get nodes on theBaseEdge sorted by param on edge and initialize theParam2ColumnMap with them
1215 map< double, const SMDS_MeshNode*> sortedBaseNodes;
1216 if ( !SMESH_Algo::GetSortedNodesOnEdge( theMesh, theBaseEdge,/*noMedium=*/true, sortedBaseNodes)
1217 || sortedBaseNodes.size() < 2 )
1220 int nbRows = faceSubMesh->NbElements() / ( sortedBaseNodes.size()-1 ) + 1;
1221 map< double, const SMDS_MeshNode*>::iterator u_n = sortedBaseNodes.begin();
1222 double f = u_n->first, range = sortedBaseNodes.rbegin()->first - f;
1223 for ( ; u_n != sortedBaseNodes.end(); u_n++ )
1225 double par = ( u_n->first - f ) / range;
1226 vector<const SMDS_MeshNode*>& nCol = theParam2ColumnMap[ par ];
1227 nCol.resize( nbRows );
1228 nCol[0] = u_n->second;
1231 // fill theParam2ColumnMap column by column by passing from nodes on
1232 // theBaseEdge up via mesh faces on theFace
1234 TParam2ColumnMap::iterator par_nVec_2 = theParam2ColumnMap.begin();
1235 TParam2ColumnMap::iterator par_nVec_1 = par_nVec_2++;
1236 TIDSortedElemSet emptySet, avoidSet;
1237 for ( ; par_nVec_2 != theParam2ColumnMap.end(); ++par_nVec_1, ++par_nVec_2 )
1239 vector<const SMDS_MeshNode*>& nCol1 = par_nVec_1->second;
1240 vector<const SMDS_MeshNode*>& nCol2 = par_nVec_2->second;
1242 int i1, i2, iRow = 0;
1243 const SMDS_MeshNode *n1 = nCol1[0], *n2 = nCol2[0];
1244 // find face sharing node n1 and n2 and belonging to faceSubMesh
1245 while ( const SMDS_MeshElement* face =
1246 SMESH_MeshEditor::FindFaceInSet( n1, n2, emptySet, avoidSet, &i1, &i2))
1248 if ( faceSubMesh->Contains( face ))
1250 int nbNodes = face->IsQuadratic() ? face->NbNodes()/2 : face->NbNodes();
1253 n1 = face->GetNode( (i2+2) % 4 ); // opposite corner of quadrangle face
1254 n2 = face->GetNode( (i1+2) % 4 );
1255 if ( ++iRow >= nbRows )
1261 avoidSet.insert( face );
1263 if ( iRow + 1 < nbRows ) // compact if necessary
1264 nCol1.resize( iRow + 1 ), nCol2.resize( iRow + 1 );
1269 //=======================================================================
1270 //function : NbAncestors
1271 //purpose : Return number of unique ancestors of the shape
1272 //=======================================================================
1274 int SMESH_MesherHelper::NbAncestors(const TopoDS_Shape& shape,
1275 const SMESH_Mesh& mesh,
1276 TopAbs_ShapeEnum ancestorType/*=TopAbs_SHAPE*/)
1278 TopTools_MapOfShape ancestors;
1279 TopTools_ListIteratorOfListOfShape ansIt( mesh.GetAncestors(shape) );
1280 for ( ; ansIt.More(); ansIt.Next() ) {
1281 if ( ancestorType == TopAbs_SHAPE || ansIt.Value().ShapeType() == ancestorType )
1282 ancestors.Add( ansIt.Value() );
1284 return ancestors.Extent();
1287 //=======================================================================
1288 //function : GetSubShapeOri
1289 //purpose : Return orientation of sub-shape in the main shape
1290 //=======================================================================
1292 TopAbs_Orientation SMESH_MesherHelper::GetSubShapeOri(const TopoDS_Shape& shape,
1293 const TopoDS_Shape& subShape)
1295 TopAbs_Orientation ori = TopAbs_Orientation(-1);
1296 if ( !shape.IsNull() && !subShape.IsNull() )
1298 TopExp_Explorer e( shape, subShape.ShapeType() );
1299 if ( shape.Orientation() >= TopAbs_INTERNAL ) // TopAbs_INTERNAL or TopAbs_EXTERNAL
1300 e.Init( shape.Oriented(TopAbs_FORWARD), subShape.ShapeType() );
1301 for ( ; e.More(); e.Next())
1302 if ( subShape.IsSame( e.Current() ))
1305 ori = e.Current().Orientation();
1310 //=======================================================================
1311 //function : IsSubShape
1313 //=======================================================================
1315 bool SMESH_MesherHelper::IsSubShape( const TopoDS_Shape& shape,
1316 const TopoDS_Shape& mainShape )
1318 if ( !shape.IsNull() && !mainShape.IsNull() )
1320 for ( TopExp_Explorer exp( mainShape, shape.ShapeType());
1323 if ( shape.IsSame( exp.Current() ))
1326 SCRUTE((shape.IsNull()));
1327 SCRUTE((mainShape.IsNull()));
1331 //=======================================================================
1332 //function : IsSubShape
1334 //=======================================================================
1336 bool SMESH_MesherHelper::IsSubShape( const TopoDS_Shape& shape, SMESH_Mesh* aMesh )
1338 if ( shape.IsNull() || !aMesh )
1341 aMesh->GetMeshDS()->ShapeToIndex( shape ) ||
1343 shape.ShapeType() == TopAbs_COMPOUND && aMesh->GetMeshDS()->IsGroupOfSubShapes( shape );
1346 //=======================================================================
1347 //function : IsQuadraticMesh
1348 //purpose : Check mesh without geometry for: if all elements on this shape are quadratic,
1349 // quadratic elements will be created.
1350 // Used then generated 3D mesh without geometry.
1351 //=======================================================================
1353 SMESH_MesherHelper:: MType SMESH_MesherHelper::IsQuadraticMesh()
1355 int NbAllEdgsAndFaces=0;
1356 int NbQuadFacesAndEdgs=0;
1357 int NbFacesAndEdges=0;
1358 //All faces and edges
1359 NbAllEdgsAndFaces = myMesh->NbEdges() + myMesh->NbFaces();
1361 //Quadratic faces and edges
1362 NbQuadFacesAndEdgs = myMesh->NbEdges(ORDER_QUADRATIC) + myMesh->NbFaces(ORDER_QUADRATIC);
1364 //Linear faces and edges
1365 NbFacesAndEdges = myMesh->NbEdges(ORDER_LINEAR) + myMesh->NbFaces(ORDER_LINEAR);
1367 if (NbAllEdgsAndFaces == NbQuadFacesAndEdgs) {
1369 return SMESH_MesherHelper::QUADRATIC;
1371 else if (NbAllEdgsAndFaces == NbFacesAndEdges) {
1373 return SMESH_MesherHelper::LINEAR;
1376 //Mesh with both type of elements
1377 return SMESH_MesherHelper::COMP;
1380 //=======================================================================
1381 //function : GetOtherParam
1382 //purpose : Return an alternative parameter for a node on seam
1383 //=======================================================================
1385 double SMESH_MesherHelper::GetOtherParam(const double param) const
1387 int i = myParIndex & U_periodic ? 0 : 1;
1388 return fabs(param-myPar1[i]) < fabs(param-myPar2[i]) ? myPar2[i] : myPar1[i];
1391 //=======================================================================
1392 namespace { // Structures used by FixQuadraticElements()
1393 //=======================================================================
1395 #define __DMP__(txt) \
1397 #define MSG(txt) __DMP__(txt<<endl)
1398 #define MSGBEG(txt) __DMP__(txt)
1400 const double straightTol2 = 1e-33; // to detect straing links
1403 // ---------------------------------------
1405 * \brief Quadratic link knowing its faces
1407 struct QLink: public SMESH_TLink
1409 const SMDS_MeshNode* _mediumNode;
1410 mutable vector<const QFace* > _faces;
1411 mutable gp_Vec _nodeMove;
1412 mutable int _nbMoves;
1414 QLink(const SMDS_MeshNode* n1, const SMDS_MeshNode* n2, const SMDS_MeshNode* nm):
1415 SMESH_TLink( n1,n2 ), _mediumNode(nm), _nodeMove(0,0,0), _nbMoves(0) {
1417 //if ( MediumPos() != SMDS_TOP_3DSPACE )
1418 _nodeMove = MediumPnt() - MiddlePnt();
1420 void SetContinuesFaces() const;
1421 const QFace* GetContinuesFace( const QFace* face ) const;
1422 bool OnBoundary() const;
1423 gp_XYZ MiddlePnt() const { return ( XYZ( node1() ) + XYZ( node2() )) / 2.; }
1424 gp_XYZ MediumPnt() const { return XYZ( _mediumNode ); }
1426 SMDS_TypeOfPosition MediumPos() const
1427 { return _mediumNode->GetPosition()->GetTypeOfPosition(); }
1428 SMDS_TypeOfPosition EndPos(bool isSecond) const
1429 { return (isSecond ? node2() : node1())->GetPosition()->GetTypeOfPosition(); }
1430 const SMDS_MeshNode* EndPosNode(SMDS_TypeOfPosition pos) const
1431 { return EndPos(0) == pos ? node1() : EndPos(1) == pos ? node2() : 0; }
1433 void Move(const gp_Vec& move, bool sum=false) const
1434 { _nodeMove += move; _nbMoves += sum ? (_nbMoves==0) : 1; }
1435 gp_XYZ Move() const { return _nodeMove.XYZ() / _nbMoves; }
1436 bool IsMoved() const { return (_nbMoves > 0 && !IsStraight()); }
1437 bool IsStraight() const { return _nodeMove.SquareMagnitude() <= straightTol2; }
1439 bool operator<(const QLink& other) const {
1440 return (node1()->GetID() == other.node1()->GetID() ?
1441 node2()->GetID() < other.node2()->GetID() :
1442 node1()->GetID() < other.node1()->GetID());
1444 struct PtrComparator {
1445 bool operator() (const QLink* l1, const QLink* l2 ) const { return *l1 < *l2; }
1448 // ---------------------------------------------------------
1450 * \brief Link in the chain of links; it connects two faces
1454 const QLink* _qlink;
1455 mutable const QFace* _qfaces[2];
1457 TChainLink(const QLink* qlink=0):_qlink(qlink) {
1458 _qfaces[0] = _qfaces[1] = 0;
1460 void SetFace(const QFace* face) { int iF = _qfaces[0] ? 1 : 0; _qfaces[iF]=face; }
1462 bool IsBoundary() const { return !_qfaces[1]; }
1464 void RemoveFace( const QFace* face ) const
1465 { _qfaces[(face == _qfaces[1])] = 0; if (!_qfaces[0]) std::swap(_qfaces[0],_qfaces[1]); }
1467 const QFace* NextFace( const QFace* f ) const
1468 { return _qfaces[0]==f ? _qfaces[1] : _qfaces[0]; }
1470 const SMDS_MeshNode* NextNode( const SMDS_MeshNode* n ) const
1471 { return n == _qlink->node1() ? _qlink->node2() : _qlink->node1(); }
1473 bool operator<(const TChainLink& other) const { return *_qlink < *other._qlink; }
1475 operator bool() const { return (_qlink); }
1477 const QLink* operator->() const { return _qlink; }
1479 gp_Vec Normal() const;
1481 // --------------------------------------------------------------------
1482 typedef list< TChainLink > TChain;
1483 typedef set < TChainLink > TLinkSet;
1484 typedef TLinkSet::const_iterator TLinkInSet;
1486 const int theFirstStep = 5;
1488 enum { ERR_OK, ERR_TRI, ERR_PRISM, ERR_UNKNOWN }; // errors of QFace::GetLinkChain()
1489 // --------------------------------------------------------------------
1491 * \brief Face shared by two volumes and bound by QLinks
1493 struct QFace: public TIDSortedElemSet
1495 mutable const SMDS_MeshElement* _volumes[2];
1496 mutable vector< const QLink* > _sides;
1497 mutable bool _sideIsAdded[4]; // added in chain of links
1500 mutable const SMDS_MeshElement* _face;
1503 QFace( const vector< const QLink*>& links, const SMDS_MeshElement* face=0 );
1505 void SetVolume(const SMDS_MeshElement* v) const { _volumes[ _volumes[0] ? 1 : 0 ] = v; }
1507 int NbVolumes() const { return !_volumes[0] ? 0 : !_volumes[1] ? 1 : 2; }
1509 void AddSelfToLinks() const {
1510 for ( int i = 0; i < _sides.size(); ++i )
1511 _sides[i]->_faces.push_back( this );
1513 int LinkIndex( const QLink* side ) const {
1514 for (int i=0; i<_sides.size(); ++i ) if ( _sides[i] == side ) return i;
1517 bool GetLinkChain( int iSide, TChain& chain, SMDS_TypeOfPosition pos, int& err) const;
1519 bool GetLinkChain( TChainLink& link, TChain& chain, SMDS_TypeOfPosition pos, int& err) const
1521 int i = LinkIndex( link._qlink );
1522 if ( i < 0 ) return true;
1523 _sideIsAdded[i] = true;
1524 link.SetFace( this );
1525 // continue from opposite link
1526 return GetLinkChain( (i+2)%_sides.size(), chain, pos, err );
1528 bool IsBoundary() const { return !_volumes[1]; }
1530 bool Contains( const SMDS_MeshNode* node ) const { return count(node); }
1532 TLinkInSet GetBoundaryLink( const TLinkSet& links,
1533 const TChainLink& avoidLink,
1534 TLinkInSet * notBoundaryLink = 0,
1535 const SMDS_MeshNode* nodeToContain = 0,
1536 bool * isAdjacentUsed = 0,
1537 int nbRecursionsLeft = -1) const;
1539 TLinkInSet GetLinkByNode( const TLinkSet& links,
1540 const TChainLink& avoidLink,
1541 const SMDS_MeshNode* nodeToContain) const;
1543 const SMDS_MeshNode* GetNodeInFace() const {
1544 for ( int iL = 0; iL < _sides.size(); ++iL )
1545 if ( _sides[iL]->MediumPos() == SMDS_TOP_FACE ) return _sides[iL]->_mediumNode;
1549 gp_Vec LinkNorm(const int i, SMESH_MesherHelper* theFaceHelper=0) const;
1551 double MoveByBoundary( const TChainLink& theLink,
1552 const gp_Vec& theRefVec,
1553 const TLinkSet& theLinks,
1554 SMESH_MesherHelper* theFaceHelper=0,
1555 const double thePrevLen=0,
1556 const int theStep=theFirstStep,
1557 gp_Vec* theLinkNorm=0,
1558 double theSign=1.0) const;
1561 //================================================================================
1563 * \brief Dump QLink and QFace
1565 ostream& operator << (ostream& out, const QLink& l)
1567 out <<"QLink nodes: "
1568 << l.node1()->GetID() << " - "
1569 << l._mediumNode->GetID() << " - "
1570 << l.node2()->GetID() << endl;
1573 ostream& operator << (ostream& out, const QFace& f)
1575 out <<"QFace nodes: "/*<< &f << " "*/;
1576 for ( TIDSortedElemSet::const_iterator n = f.begin(); n != f.end(); ++n )
1577 out << (*n)->GetID() << " ";
1578 out << " \tvolumes: "
1579 << (f._volumes[0] ? f._volumes[0]->GetID() : 0) << " "
1580 << (f._volumes[1] ? f._volumes[1]->GetID() : 0);
1581 out << " \tNormal: "<< f._normal.X() <<", "<<f._normal.Y() <<", "<<f._normal.Z() << endl;
1585 //================================================================================
1587 * \brief Construct QFace from QLinks
1589 //================================================================================
1591 QFace::QFace( const vector< const QLink*>& links, const SMDS_MeshElement* face )
1593 _volumes[0] = _volumes[1] = 0;
1595 _sideIsAdded[0]=_sideIsAdded[1]=_sideIsAdded[2]=_sideIsAdded[3]=false;
1596 _normal.SetCoord(0,0,0);
1597 for ( int i = 1; i < _sides.size(); ++i ) {
1598 const QLink *l1 = _sides[i-1], *l2 = _sides[i];
1599 insert( l1->node1() ); insert( l1->node2() );
1601 gp_Vec v1( XYZ( l1->node2()), XYZ( l1->node1()));
1602 gp_Vec v2( XYZ( l2->node1()), XYZ( l2->node2()));
1603 if ( l1->node1() != l2->node1() && l1->node2() != l2->node2() )
1607 double normSqSize = _normal.SquareMagnitude();
1608 if ( normSqSize > numeric_limits<double>::min() )
1609 _normal /= sqrt( normSqSize );
1611 _normal.SetCoord(1e-33,0,0);
1617 //================================================================================
1619 * \brief Make up chain of links
1620 * \param iSide - link to add first
1621 * \param chain - chain to fill in
1622 * \param pos - postion of medium nodes the links should have
1623 * \param error - out, specifies what is wrong
1624 * \retval bool - false if valid chain can't be built; "valid" means that links
1625 * of the chain belongs to rectangles bounding hexahedrons
1627 //================================================================================
1629 bool QFace::GetLinkChain( int iSide, TChain& chain, SMDS_TypeOfPosition pos, int& error) const
1631 if ( iSide >= _sides.size() ) // wrong argument iSide
1633 if ( _sideIsAdded[ iSide ]) // already in chain
1636 if ( _sides.size() != 4 ) { // triangle - visit all my continous faces
1638 list< const QFace* > faces( 1, this );
1639 for (list< const QFace* >::iterator fIt = faces.begin(); fIt != faces.end(); ++fIt ) {
1640 const QFace* face = *fIt;
1641 for ( int i = 0; i < face->_sides.size(); ++i ) {
1642 if ( !face->_sideIsAdded[i] && face->_sides[i] ) {
1643 face->_sideIsAdded[i] = true;
1644 TChain::iterator chLink = chain.insert( chain.begin(), TChainLink(face->_sides[i]));
1645 chLink->SetFace( face );
1646 if ( face->_sides[i]->MediumPos() >= pos )
1647 if ( const QFace* contFace = face->_sides[i]->GetContinuesFace( face ))
1648 faces.push_back( contFace );
1652 if ( error < ERR_TRI )
1656 _sideIsAdded[iSide] = true; // not to add this link to chain again
1657 const QLink* link = _sides[iSide];
1661 // add link into chain
1662 TChain::iterator chLink = chain.insert( chain.begin(), TChainLink(link));
1663 chLink->SetFace( this );
1666 // propagate from quadrangle to neighbour faces
1667 if ( link->MediumPos() >= pos ) {
1668 int nbLinkFaces = link->_faces.size();
1669 if ( nbLinkFaces == 4 || nbLinkFaces < 4 && link->OnBoundary()) {
1670 // hexahedral mesh or boundary quadrangles - goto a continous face
1671 if ( const QFace* f = link->GetContinuesFace( this ))
1672 return f->GetLinkChain( *chLink, chain, pos, error );
1675 TChainLink chLink(link); // side face of prismatic mesh - visit all faces of iSide
1676 for ( int i = 0; i < nbLinkFaces; ++i )
1677 if ( link->_faces[i] )
1678 link->_faces[i]->GetLinkChain( chLink, chain, pos, error );
1679 if ( error < ERR_PRISM )
1687 //================================================================================
1689 * \brief Return a boundary link of the triangle face
1690 * \param links - set of all links
1691 * \param avoidLink - link not to return
1692 * \param notBoundaryLink - out, neither the returned link nor avoidLink
1693 * \param nodeToContain - node the returned link must contain; if provided, search
1694 * also performed on adjacent faces
1695 * \param isAdjacentUsed - returns true if link is found in adjacent faces
1696 * \param nbRecursionsLeft - to limit recursion
1698 //================================================================================
1700 TLinkInSet QFace::GetBoundaryLink( const TLinkSet& links,
1701 const TChainLink& avoidLink,
1702 TLinkInSet * notBoundaryLink,
1703 const SMDS_MeshNode* nodeToContain,
1704 bool * isAdjacentUsed,
1705 int nbRecursionsLeft) const
1707 TLinkInSet linksEnd = links.end(), boundaryLink = linksEnd;
1709 typedef list< pair< const QFace*, TLinkInSet > > TFaceLinkList;
1710 TFaceLinkList adjacentFaces;
1712 for ( int iL = 0; iL < _sides.size(); ++iL )
1714 if ( avoidLink._qlink == _sides[iL] )
1716 TLinkInSet link = links.find( _sides[iL] );
1717 if ( link == linksEnd ) continue;
1718 if ( (*link)->MediumPos() > SMDS_TOP_FACE )
1719 continue; // We work on faces here, don't go into a volume
1722 if ( link->IsBoundary() ) {
1723 if ( !nodeToContain ||
1724 (*link)->node1() == nodeToContain ||
1725 (*link)->node2() == nodeToContain )
1727 boundaryLink = link;
1728 if ( !notBoundaryLink ) break;
1731 else if ( notBoundaryLink ) {
1732 *notBoundaryLink = link;
1733 if ( boundaryLink != linksEnd ) break;
1736 if ( boundaryLink == linksEnd && nodeToContain ) // collect adjacent faces
1737 if ( const QFace* adj = link->NextFace( this ))
1738 if ( adj->Contains( nodeToContain ))
1739 adjacentFaces.push_back( make_pair( adj, link ));
1742 if ( isAdjacentUsed ) *isAdjacentUsed = false;
1743 if ( boundaryLink == linksEnd && nodeToContain && nbRecursionsLeft) // check adjacent faces
1745 if ( nbRecursionsLeft < 0 )
1746 nbRecursionsLeft = nodeToContain->NbInverseElements();
1747 TFaceLinkList::iterator adj = adjacentFaces.begin();
1748 for ( ; boundaryLink == linksEnd && adj != adjacentFaces.end(); ++adj )
1749 boundaryLink = adj->first->GetBoundaryLink( links, *(adj->second), 0, nodeToContain,
1750 isAdjacentUsed, nbRecursionsLeft-1);
1751 if ( isAdjacentUsed ) *isAdjacentUsed = true;
1753 return boundaryLink;
1755 //================================================================================
1757 * \brief Return a link ending at the given node but not avoidLink
1759 //================================================================================
1761 TLinkInSet QFace::GetLinkByNode( const TLinkSet& links,
1762 const TChainLink& avoidLink,
1763 const SMDS_MeshNode* nodeToContain) const
1765 for ( int i = 0; i < _sides.size(); ++i )
1766 if ( avoidLink._qlink != _sides[i] &&
1767 (_sides[i]->node1() == nodeToContain || _sides[i]->node2() == nodeToContain ))
1768 return links.find( _sides[ i ]);
1772 //================================================================================
1774 * \brief Return normal to the i-th side pointing outside the face
1776 //================================================================================
1778 gp_Vec QFace::LinkNorm(const int i, SMESH_MesherHelper* /*uvHelper*/) const
1780 gp_Vec norm, vecOut;
1781 // if ( uvHelper ) {
1782 // TopoDS_Face face = TopoDS::Face( uvHelper->GetSubShape());
1783 // const SMDS_MeshNode* inFaceNode = uvHelper->GetNodeUVneedInFaceNode() ? GetNodeInFace() : 0;
1784 // gp_XY uv1 = uvHelper->GetNodeUV( face, _sides[i]->node1(), inFaceNode );
1785 // gp_XY uv2 = uvHelper->GetNodeUV( face, _sides[i]->node2(), inFaceNode );
1786 // norm.SetCoord( uv1.Y() - uv2.Y(), uv2.X() - uv1.X(), 0 );
1788 // const QLink* otherLink = _sides[(i + 1) % _sides.size()];
1789 // const SMDS_MeshNode* otherNode =
1790 // otherLink->node1() == _sides[i]->node1() ? otherLink->node2() : otherLink->node1();
1791 // gp_XY pIn = uvHelper->GetNodeUV( face, otherNode, inFaceNode );
1792 // vecOut.SetCoord( uv1.X() - pIn.X(), uv1.Y() - pIn.Y(), 0 );
1795 norm = _normal ^ gp_Vec( XYZ(_sides[i]->node1()), XYZ(_sides[i]->node2()));
1796 gp_XYZ pIn = ( XYZ( _sides[0]->node1() ) +
1797 XYZ( _sides[0]->node2() ) +
1798 XYZ( _sides[1]->node1() )) / 3.;
1799 vecOut.SetXYZ( _sides[i]->MiddlePnt() - pIn );
1801 if ( norm * vecOut < 0 )
1803 double mag2 = norm.SquareMagnitude();
1804 if ( mag2 > numeric_limits<double>::min() )
1805 norm /= sqrt( mag2 );
1808 //================================================================================
1810 * \brief Move medium node of theLink according to its distance from boundary
1811 * \param theLink - link to fix
1812 * \param theRefVec - movement of boundary
1813 * \param theLinks - all adjacent links of continous triangles
1814 * \param theFaceHelper - helper is not used so far
1815 * \param thePrevLen - distance from the boundary
1816 * \param theStep - number of steps till movement propagation limit
1817 * \param theLinkNorm - out normal to theLink
1818 * \param theSign - 1 or -1 depending on movement of boundary
1819 * \retval double - distance from boundary to propagation limit or other boundary
1821 //================================================================================
1823 double QFace::MoveByBoundary( const TChainLink& theLink,
1824 const gp_Vec& theRefVec,
1825 const TLinkSet& theLinks,
1826 SMESH_MesherHelper* theFaceHelper,
1827 const double thePrevLen,
1829 gp_Vec* theLinkNorm,
1830 double theSign) const
1833 return thePrevLen; // propagation limit reached
1835 int iL; // index of theLink
1836 for ( iL = 0; iL < _sides.size(); ++iL )
1837 if ( theLink._qlink == _sides[ iL ])
1840 MSG(string(theStep,'.')<<" Ref( "<<theRefVec.X()<<","<<theRefVec.Y()<<","<<theRefVec.Z()<<" )"
1841 <<" thePrevLen " << thePrevLen);
1842 MSG(string(theStep,'.')<<" "<<*theLink._qlink);
1844 gp_Vec linkNorm = -LinkNorm( iL/*, theFaceHelper*/ ); // normal to theLink
1845 double refProj = theRefVec * linkNorm; // project movement vector to normal of theLink
1846 if ( theStep == theFirstStep )
1847 theSign = refProj < 0. ? -1. : 1.;
1848 else if ( theSign * refProj < 0.4 * theRefVec.Magnitude())
1849 return thePrevLen; // to propagate movement forward only, not in side dir or backward
1851 int iL1 = (iL + 1) % 3, iL2 = (iL + 2) % 3; // indices of the two other links of triangle
1852 TLinkInSet link1 = theLinks.find( _sides[iL1] );
1853 TLinkInSet link2 = theLinks.find( _sides[iL2] );
1854 if ( link1 == theLinks.end() || link2 == theLinks.end() )
1856 const QFace* f1 = link1->NextFace( this ); // adjacent faces
1857 const QFace* f2 = link2->NextFace( this );
1859 // propagate to adjacent faces till limit step or boundary
1860 double len1 = thePrevLen + (theLink->MiddlePnt() - _sides[iL1]->MiddlePnt()).Modulus();
1861 double len2 = thePrevLen + (theLink->MiddlePnt() - _sides[iL2]->MiddlePnt()).Modulus();
1862 gp_Vec linkDir1, linkDir2;
1866 len1 = f1->MoveByBoundary
1867 ( *link1, theRefVec, theLinks, theFaceHelper, len1, theStep-1, &linkDir1, theSign);
1869 linkDir1 = LinkNorm( iL1/*, theFaceHelper*/ );
1871 MSG( " --------------- EXCEPTION");
1877 len2 = f2->MoveByBoundary
1878 ( *link2, theRefVec, theLinks, theFaceHelper, len2, theStep-1, &linkDir2, theSign);
1880 linkDir2 = LinkNorm( iL2/*, theFaceHelper*/ );
1882 MSG( " --------------- EXCEPTION");
1887 if ( theStep != theFirstStep )
1889 // choose chain length by direction of propagation most codirected with theRefVec
1890 bool choose1 = ( theRefVec * linkDir1 * theSign > theRefVec * linkDir2 * theSign );
1891 fullLen = choose1 ? len1 : len2;
1892 double r = thePrevLen / fullLen;
1894 gp_Vec move = linkNorm * refProj * ( 1 - r );
1895 theLink->Move( move, true );
1897 MSG(string(theStep,'.')<<" Move "<< theLink->_mediumNode->GetID()<<
1898 " by " << refProj * ( 1 - r ) << " following " <<
1899 (choose1 ? *link1->_qlink : *link2->_qlink));
1901 if ( theLinkNorm ) *theLinkNorm = linkNorm;
1906 //================================================================================
1908 * \brief Find pairs of continues faces
1910 //================================================================================
1912 void QLink::SetContinuesFaces() const
1914 // x0 x - QLink, [-|] - QFace, v - volume
1916 // | Between _faces of link x2 two vertical faces are continues
1917 // x1----x2-----x3 and two horizontal faces are continues. We set vertical faces
1918 // | to _faces[0] and _faces[1] and horizontal faces to
1919 // v2 | v3 _faces[2] and _faces[3] (or vise versa).
1922 if ( _faces.empty() )
1925 for ( int iF = 1; iFaceCont < 0 && iF < _faces.size(); ++iF )
1927 // look for a face bounding none of volumes bound by _faces[0]
1928 bool sameVol = false;
1929 int nbVol = _faces[iF]->NbVolumes();
1930 for ( int iV = 0; !sameVol && iV < nbVol; ++iV )
1931 sameVol = ( _faces[iF]->_volumes[iV] == _faces[0]->_volumes[0] ||
1932 _faces[iF]->_volumes[iV] == _faces[0]->_volumes[1]);
1936 if ( iFaceCont > 0 ) // continues faces found, set one by the other
1938 if ( iFaceCont != 1 )
1939 std::swap( _faces[1], _faces[iFaceCont] );
1941 else if ( _faces.size() > 1 ) // not found, set NULL by the first face
1943 _faces.insert( ++_faces.begin(), 0 );
1946 //================================================================================
1948 * \brief Return a face continues to the given one
1950 //================================================================================
1952 const QFace* QLink::GetContinuesFace( const QFace* face ) const
1954 for ( int i = 0; i < _faces.size(); ++i ) {
1955 if ( _faces[i] == face ) {
1956 int iF = i < 2 ? 1-i : 5-i;
1957 return iF < _faces.size() ? _faces[iF] : 0;
1962 //================================================================================
1964 * \brief True if link is on mesh boundary
1966 //================================================================================
1968 bool QLink::OnBoundary() const
1970 for ( int i = 0; i < _faces.size(); ++i )
1971 if (_faces[i] && _faces[i]->IsBoundary()) return true;
1974 //================================================================================
1976 * \brief Return normal of link of the chain
1978 //================================================================================
1980 gp_Vec TChainLink::Normal() const {
1982 if (_qfaces[0]) norm = _qfaces[0]->_normal;
1983 if (_qfaces[1]) norm += _qfaces[1]->_normal;
1986 //================================================================================
1988 * \brief Move medium nodes of vertical links of pentahedrons adjacent by side faces
1990 //================================================================================
1992 void fixPrism( TChain& allLinks )
1994 // separate boundary links from internal ones
1995 typedef set<const QLink*/*, QLink::PtrComparator*/> QLinkSet;
1996 QLinkSet interLinks, bndLinks1, bndLink2;
1998 bool isCurved = false;
1999 for ( TChain::iterator lnk = allLinks.begin(); lnk != allLinks.end(); ++lnk ) {
2000 if ( (*lnk)->OnBoundary() )
2001 bndLinks1.insert( lnk->_qlink );
2003 interLinks.insert( lnk->_qlink );
2004 isCurved = isCurved || !(*lnk)->IsStraight();
2007 return; // no need to move
2009 QLinkSet *curBndLinks = &bndLinks1, *newBndLinks = &bndLink2;
2011 while ( !interLinks.empty() && !curBndLinks->empty() )
2013 // propagate movement from boundary links to connected internal links
2014 QLinkSet::iterator bnd = curBndLinks->begin(), bndEnd = curBndLinks->end();
2015 for ( ; bnd != bndEnd; ++bnd )
2017 const QLink* bndLink = *bnd;
2018 for ( int i = 0; i < bndLink->_faces.size(); ++i ) // loop on faces of bndLink
2020 const QFace* face = bndLink->_faces[i]; // quadrange lateral face of a prism
2021 if ( !face ) continue;
2022 // find and move internal link opposite to bndLink within the face
2023 int interInd = ( face->LinkIndex( bndLink ) + 2 ) % face->_sides.size();
2024 const QLink* interLink = face->_sides[ interInd ];
2025 QLinkSet::iterator pInterLink = interLinks.find( interLink );
2026 if ( pInterLink == interLinks.end() ) continue; // not internal link
2027 interLink->Move( bndLink->_nodeMove );
2028 // treated internal links become new boundary ones
2029 interLinks. erase( pInterLink );
2030 newBndLinks->insert( interLink );
2033 curBndLinks->clear();
2034 std::swap( curBndLinks, newBndLinks );
2038 //================================================================================
2040 * \brief Fix links of continues triangles near curved boundary
2042 //================================================================================
2044 void fixTriaNearBoundary( TChain & allLinks, SMESH_MesherHelper& /*helper*/)
2046 if ( allLinks.empty() ) return;
2048 TLinkSet linkSet( allLinks.begin(), allLinks.end());
2049 TLinkInSet linkIt = linkSet.begin(), linksEnd = linkSet.end();
2051 // move in 2d if we are on geom face
2052 // TopoDS_Face face;
2053 // TopLoc_Location loc;
2054 // SMESH_MesherHelper faceHelper( *helper.GetMesh());
2055 // while ( linkIt->IsBoundary()) ++linkIt;
2056 // if ( linkIt == linksEnd ) return;
2057 // if ( (*linkIt)->MediumPos() == SMDS_TOP_FACE ) {
2058 // bool checkPos = true;
2059 // TopoDS_Shape f = helper.GetSubShapeByNode( (*linkIt)->_mediumNode, helper.GetMeshDS() );
2060 // if ( !f.IsNull() && f.ShapeType() == TopAbs_FACE ) {
2061 // face = TopoDS::Face( f );
2062 // helper.GetNodeUV( face, (*linkIt)->_mediumNode, 0, &checkPos);
2066 // faceHelper.SetSubShape( face );
2069 for ( linkIt = linkSet.begin(); linkIt != linksEnd; ++linkIt)
2071 if ( linkIt->IsBoundary() && !(*linkIt)->IsStraight() && linkIt->_qfaces[0])
2073 // if ( !face.IsNull() ) {
2074 // const SMDS_MeshNode* inFaceNode =
2075 // faceHelper.GetNodeUVneedInFaceNode() ? linkIt->_qfaces[0]->GetNodeInFace() : 0;
2076 // gp_XY uvm = helper.GetNodeUV( face, (*linkIt)->_mediumNode, inFaceNode );
2077 // gp_XY uv1 = helper.GetNodeUV( face, (*linkIt)->node1(), inFaceNode);
2078 // gp_XY uv2 = helper.GetNodeUV( face, (*linkIt)->node2(), inFaceNode);
2079 // gp_XY uvMove = uvm - helper.GetMiddleUV( BRep_Tool::Surface(face,loc), uv1, uv2);
2080 // gp_Vec move( uvMove.X(), uvMove.Y(), 0 );
2081 // linkIt->_qfaces[0]->MoveByBoundary( *linkIt, move, linkSet, &faceHelper );
2084 linkIt->_qfaces[0]->MoveByBoundary( *linkIt, (*linkIt)->_nodeMove, linkSet );
2090 //================================================================================
2092 * \brief Detect rectangular structure of links and build chains from them
2094 //================================================================================
2096 enum TSplitTriaResult {
2097 _OK, _NO_CORNERS, _FEW_ROWS, _MANY_ROWS, _NO_SIDELINK, _BAD_MIDQUAD, _NOT_RECT,
2098 _NO_MIDQUAD, _NO_UPTRIA, _BAD_SET_SIZE, _BAD_CORNER, _BAD_START, _NO_BOTLINK };
2100 TSplitTriaResult splitTrianglesIntoChains( TChain & allLinks,
2101 vector< TChain> & resultChains,
2102 SMDS_TypeOfPosition pos )
2104 // put links in the set and evalute number of result chains by number of boundary links
2107 for ( TChain::iterator lnk = allLinks.begin(); lnk != allLinks.end(); ++lnk ) {
2108 linkSet.insert( *lnk );
2109 nbBndLinks += lnk->IsBoundary();
2111 resultChains.clear();
2112 resultChains.reserve( nbBndLinks / 2 );
2114 TLinkInSet linkIt, linksEnd = linkSet.end();
2116 // find a boundary link with corner node; corner node has position pos-2
2117 // i.e. SMDS_TOP_VERTEX for links on faces and SMDS_TOP_EDGE for
2119 SMDS_TypeOfPosition cornerPos = SMDS_TypeOfPosition(pos-2);
2120 const SMDS_MeshNode* corner = 0;
2121 for ( linkIt = linkSet.begin(); linkIt != linksEnd; ++linkIt )
2122 if ( linkIt->IsBoundary() && (corner = (*linkIt)->EndPosNode(cornerPos)))
2127 TLinkInSet startLink = linkIt;
2128 const SMDS_MeshNode* startCorner = corner;
2129 vector< TChain* > rowChains;
2132 while ( startLink != linksEnd) // loop on columns
2134 // We suppose we have a rectangular structure like shown here. We have found a
2135 // corner of the rectangle (startCorner) and a boundary link sharing
2136 // |/ |/ | the startCorner (startLink). We are going to loop on rows of the
2137 // --o---o---o structure making several chains at once. One chain (columnChain)
2138 // |\ | /| starts at startLink and continues upward (we look at the structure
2139 // \ | \ | / | from such point that startLink is on the bottom of the structure).
2140 // \| \|/ | While going upward we also fill horizontal chains (rowChains) we
2141 // --o---o---o encounter.
2143 // / | \ | \ | startCorner
2148 if ( resultChains.size() == nbBndLinks / 2 )
2150 resultChains.push_back( TChain() );
2151 TChain& columnChain = resultChains.back();
2153 TLinkInSet botLink = startLink; // current horizontal link to go up from
2154 corner = startCorner; // current corner the botLink ends at
2156 while ( botLink != linksEnd ) // loop on rows
2158 // add botLink to the columnChain
2159 columnChain.push_back( *botLink );
2161 const QFace* botTria = botLink->_qfaces[0]; // bottom triangle bound by botLink
2163 { // the column ends
2164 linkSet.erase( botLink );
2165 if ( iRow != rowChains.size() )
2166 return _FEW_ROWS; // different nb of rows in columns
2169 // find the link dividing the quadrangle (midQuadLink) and vertical boundary
2170 // link ending at <corner> (sideLink); there are two cases:
2171 // 1) midQuadLink does not end at <corner>, then we easily find it by botTria,
2172 // since midQuadLink is not at boundary while sideLink is.
2173 // 2) midQuadLink ends at <corner>
2175 TLinkInSet midQuadLink = linksEnd;
2176 TLinkInSet sideLink = botTria->GetBoundaryLink( linkSet, *botLink, &midQuadLink,
2178 if ( isCase2 ) { // find midQuadLink among links of botTria
2179 midQuadLink = botTria->GetLinkByNode( linkSet, *botLink, corner );
2180 if ( midQuadLink->IsBoundary() )
2181 return _BAD_MIDQUAD;
2183 if ( sideLink == linksEnd || midQuadLink == linksEnd || sideLink == midQuadLink )
2184 return sideLink == linksEnd ? _NO_SIDELINK : _NO_MIDQUAD;
2187 columnChain.push_back( *midQuadLink );
2188 if ( iRow >= rowChains.size() ) {
2190 return _MANY_ROWS; // different nb of rows in columns
2191 if ( resultChains.size() == nbBndLinks / 2 )
2193 resultChains.push_back( TChain() );
2194 rowChains.push_back( & resultChains.back() );
2196 rowChains[iRow]->push_back( *sideLink );
2197 rowChains[iRow]->push_back( *midQuadLink );
2199 const QFace* upTria = midQuadLink->NextFace( botTria ); // upper tria of the rectangle
2203 // prepare startCorner and startLink for the next column
2204 startCorner = startLink->NextNode( startCorner );
2206 startLink = botTria->GetBoundaryLink( linkSet, *botLink, 0, startCorner );
2208 startLink = upTria->GetBoundaryLink( linkSet, *midQuadLink, 0, startCorner );
2209 // check if no more columns remains
2210 if ( startLink != linksEnd ) {
2211 const SMDS_MeshNode* botNode = startLink->NextNode( startCorner );
2212 if ( (isCase2 ? botTria : upTria)->Contains( botNode ))
2213 startLink = linksEnd; // startLink bounds upTria or botTria
2214 else if ( startLink == botLink || startLink == midQuadLink || startLink == sideLink )
2218 // find bottom link and corner for the next row
2219 corner = sideLink->NextNode( corner );
2220 // next bottom link ends at the new corner
2221 linkSet.erase( botLink );
2222 botLink = upTria->GetLinkByNode( linkSet, (isCase2 ? *sideLink : *midQuadLink), corner );
2223 if ( botLink == linksEnd || botLink == (isCase2 ? midQuadLink : sideLink))
2225 linkSet.erase( midQuadLink );
2226 linkSet.erase( sideLink );
2228 // make faces neighboring the found ones be boundary
2229 if ( startLink != linksEnd ) {
2230 const QFace* tria = isCase2 ? botTria : upTria;
2231 for ( int iL = 0; iL < 3; ++iL ) {
2232 linkIt = linkSet.find( tria->_sides[iL] );
2233 if ( linkIt != linksEnd )
2234 linkIt->RemoveFace( tria );
2237 if ( botLink->_qfaces[0] == upTria || botLink->_qfaces[1] == upTria )
2238 botLink->RemoveFace( upTria ); // make next botTria first in vector
2245 // In the linkSet, there must remain the last links of rowChains; add them
2246 if ( linkSet.size() != rowChains.size() )
2247 return _BAD_SET_SIZE;
2248 for ( int iRow = 0; iRow < rowChains.size(); ++iRow ) {
2249 // find the link (startLink) ending at startCorner
2251 for ( startLink = linkSet.begin(); startLink != linksEnd; ++startLink ) {
2252 if ( (*startLink)->node1() == startCorner ) {
2253 corner = (*startLink)->node2(); break;
2255 else if ( (*startLink)->node2() == startCorner) {
2256 corner = (*startLink)->node1(); break;
2259 if ( startLink == linksEnd )
2261 rowChains[ iRow ]->push_back( *startLink );
2262 linkSet.erase( startLink );
2263 startCorner = corner;
2270 //=======================================================================
2272 * \brief Move medium nodes of faces and volumes to fix distorted elements
2273 * \param volumeOnly - to fix nodes on faces or not, if the shape is solid
2275 * Issue 0020307: EDF 992 SMESH : Linea/Quadratic with Medium Node on Geometry
2277 //=======================================================================
2279 void SMESH_MesherHelper::FixQuadraticElements(bool volumeOnly)
2281 // apply algorithm to solids or geom faces
2282 // ----------------------------------------------
2283 if ( myShape.IsNull() ) {
2284 if ( !myMesh->HasShapeToMesh() ) return;
2285 SetSubShape( myMesh->GetShapeToMesh() );
2287 TopTools_MapOfShape faces; // faces not in solid or in not meshed solid
2288 for ( TopExp_Explorer f(myShape,TopAbs_FACE,TopAbs_SOLID); f.More(); f.Next() ) {
2289 faces.Add( f.Current() );
2291 for ( TopExp_Explorer s(myShape,TopAbs_SOLID); s.More(); s.Next() ) {
2292 if ( myMesh->GetSubMesh( s.Current() )->IsEmpty() ) { // get faces of solid
2293 for ( TopExp_Explorer f( s.Current(), TopAbs_FACE); f.More(); f.Next() )
2294 faces.Add( f.Current() );
2296 else { // fix nodes in the solid and its faces
2297 SMESH_MesherHelper h(*myMesh);
2298 h.SetSubShape( s.Current() );
2299 h.FixQuadraticElements(false);
2302 // fix nodes on geom faces
2303 for ( TopTools_MapIteratorOfMapOfShape fIt( faces ); fIt.More(); fIt.Next() ) {
2304 SMESH_MesherHelper h(*myMesh);
2305 h.SetSubShape( fIt.Key() );
2306 h.FixQuadraticElements(true);
2311 // Find out type of elements and get iterator on them
2312 // ---------------------------------------------------
2314 SMDS_ElemIteratorPtr elemIt;
2315 SMDSAbs_ElementType elemType = SMDSAbs_All;
2317 SMESH_subMesh* submesh = myMesh->GetSubMeshContaining( myShapeID );
2320 if ( SMESHDS_SubMesh* smDS = submesh->GetSubMeshDS() ) {
2321 elemIt = smDS->GetElements();
2322 if ( elemIt->more() ) {
2323 elemType = elemIt->next()->GetType();
2324 elemIt = smDS->GetElements();
2327 if ( !elemIt || !elemIt->more() || elemType < SMDSAbs_Face )
2330 // Fill in auxiliary data structures
2331 // ----------------------------------
2335 set< QLink >::iterator pLink;
2336 set< QFace >::iterator pFace;
2338 bool isCurved = false;
2339 bool hasRectFaces = false;
2340 set<int> nbElemNodeSet;
2342 if ( elemType == SMDSAbs_Volume )
2344 SMDS_VolumeTool volTool;
2345 while ( elemIt->more() ) // loop on volumes
2347 const SMDS_MeshElement* vol = elemIt->next();
2348 if ( !vol->IsQuadratic() || !volTool.Set( vol ))
2350 for ( int iF = 0; iF < volTool.NbFaces(); ++iF ) // loop on faces of volume
2352 int nbN = volTool.NbFaceNodes( iF );
2353 nbElemNodeSet.insert( nbN );
2354 const SMDS_MeshNode** faceNodes = volTool.GetFaceNodes( iF );
2355 vector< const QLink* > faceLinks( nbN/2 );
2356 for ( int iN = 0; iN < nbN; iN += 2 ) // loop on links of a face
2359 QLink link( faceNodes[iN], faceNodes[iN+2], faceNodes[iN+1] );
2360 pLink = links.insert( link ).first;
2361 faceLinks[ iN/2 ] = & *pLink;
2363 isCurved = !link.IsStraight();
2364 if ( link.MediumPos() == SMDS_TOP_3DSPACE && !link.IsStraight() )
2365 return; // already fixed
2368 pFace = faces.insert( QFace( faceLinks )).first;
2369 if ( pFace->NbVolumes() == 0 )
2370 pFace->AddSelfToLinks();
2371 pFace->SetVolume( vol );
2372 hasRectFaces = hasRectFaces ||
2373 ( volTool.GetVolumeType() == SMDS_VolumeTool::QUAD_HEXA ||
2374 volTool.GetVolumeType() == SMDS_VolumeTool::QUAD_PENTA );
2377 pFace->_face = GetMeshDS()->FindFace(faceNodes[0],faceNodes[2],faceNodes[4]);
2379 pFace->_face = GetMeshDS()->FindFace(faceNodes[0],faceNodes[2],
2380 faceNodes[4],faceNodes[6] );
2384 set< QLink >::iterator pLink = links.begin();
2385 for ( ; pLink != links.end(); ++pLink )
2386 pLink->SetContinuesFaces();
2390 while ( elemIt->more() ) // loop on faces
2392 const SMDS_MeshElement* face = elemIt->next();
2393 if ( !face->IsQuadratic() )
2395 nbElemNodeSet.insert( face->NbNodes() );
2396 int nbN = face->NbNodes()/2;
2397 vector< const QLink* > faceLinks( nbN );
2398 for ( int iN = 0; iN < nbN; ++iN ) // loop on links of a face
2401 QLink link( face->GetNode(iN), face->GetNode((iN+1)%nbN), face->GetNode(iN+nbN) );
2402 pLink = links.insert( link ).first;
2403 faceLinks[ iN ] = & *pLink;
2405 isCurved = !link.IsStraight();
2408 pFace = faces.insert( QFace( faceLinks )).first;
2409 pFace->AddSelfToLinks();
2410 hasRectFaces = ( hasRectFaces || nbN == 4 );
2414 return; // no curved edges of faces
2416 // Compute displacement of medium nodes
2417 // -------------------------------------
2419 // two loops on faces: the first is to treat boundary links, the second is for internal ones
2420 TopLoc_Location loc;
2421 // not treat boundary of volumic submesh
2422 int isInside = ( elemType == SMDSAbs_Volume && volumeOnly ) ? 1 : 0;
2423 for ( ; isInside < 2; ++isInside ) {
2424 MSG( "--------------- LOOP (inside=" << isInside << ") ------------------");
2425 SMDS_TypeOfPosition pos = isInside ? SMDS_TOP_3DSPACE : SMDS_TOP_FACE;
2427 for ( pFace = faces.begin(); pFace != faces.end(); ++pFace ) {
2428 if ( bool(isInside) == pFace->IsBoundary() )
2430 for ( int dir = 0; dir < 2; ++dir ) // 2 directions of propagation from quadrangle
2433 // make chain of links connected via continues faces
2436 if ( !pFace->GetLinkChain( dir, rawChain, pos, error) && error ==ERR_UNKNOWN ) continue;
2438 if ( !pFace->GetLinkChain( dir+2, rawChain, pos, error ) && error ==ERR_UNKNOWN ) continue;
2440 vector< TChain > chains;
2441 if ( error == ERR_OK ) { // chain contains continues rectangles
2443 chains[0].splice( chains[0].begin(), rawChain );
2445 else if ( error == ERR_TRI ) { // chain contains continues triangles
2446 TSplitTriaResult res = splitTrianglesIntoChains( rawChain, chains, pos );
2447 if ( res != _OK ) { // not quadrangles split into triangles
2448 fixTriaNearBoundary( rawChain, *this );
2452 else if ( error == ERR_PRISM ) { // quadrangle side faces of prisms
2453 fixPrism( rawChain );
2459 for ( int iC = 0; iC < chains.size(); ++iC )
2461 TChain& chain = chains[iC];
2462 if ( chain.empty() ) continue;
2463 if ( chain.front()->IsStraight() && chain.back()->IsStraight() ) {
2467 // mesure chain length and compute link position along the chain
2468 double chainLen = 0;
2469 vector< double > linkPos;
2470 MSGBEG( "Link medium nodes: ");
2471 TChain::iterator link0 = chain.begin(), link1 = chain.begin(), link2;
2472 for ( ++link1; link1 != chain.end(); ++link1, ++link0 ) {
2473 MSGBEG( (*link0)->_mediumNode->GetID() << "-" <<(*link1)->_mediumNode->GetID()<<" ");
2474 double len = ((*link0)->MiddlePnt() - (*link1)->MiddlePnt()).Modulus();
2475 while ( len < numeric_limits<double>::min() ) { // remove degenerated link
2476 link1 = chain.erase( link1 );
2477 if ( link1 == chain.end() )
2479 len = ((*link0)->MiddlePnt() - (*link1)->MiddlePnt()).Modulus();
2482 linkPos.push_back( chainLen );
2485 if ( linkPos.size() < 2 )
2488 gp_Vec move0 = chain.front()->_nodeMove;
2489 gp_Vec move1 = chain.back ()->_nodeMove;
2492 bool checkUV = true;
2494 // compute node displacement of end links in parametric space of face
2495 const SMDS_MeshNode* nodeOnFace = (*(++chain.begin()))->_mediumNode;
2496 TopoDS_Shape f = GetSubShapeByNode( nodeOnFace, GetMeshDS() );
2497 if ( !f.IsNull() && f.ShapeType() == TopAbs_FACE )
2499 face = TopoDS::Face( f );
2500 Handle(Geom_Surface) surf = BRep_Tool::Surface(face,loc);
2501 for ( int is1 = 0; is1 < 2; ++is1 ) // move0 or move1
2503 TChainLink& link = is1 ? chain.back() : chain.front();
2504 gp_XY uvm = GetNodeUV( face, link->_mediumNode, nodeOnFace, &checkUV);
2505 gp_XY uv1 = GetNodeUV( face, link->node1(), nodeOnFace, &checkUV);
2506 gp_XY uv2 = GetNodeUV( face, link->node2(), nodeOnFace, &checkUV);
2507 gp_XY uv12 = GetMiddleUV( surf, uv1, uv2);
2508 // uvMove = uvm - uv12
2509 gp_XY uvMove = applyIn2D(surf, uvm, uv12, gp_XY_Subtracted, /*inPeriod=*/false);
2510 ( is1 ? move1 : move0 ).SetCoord( uvMove.X(), uvMove.Y(), 0 );
2512 if ( move0.SquareMagnitude() < straightTol2 &&
2513 move1.SquareMagnitude() < straightTol2 ) {
2515 continue; // straight - no need to move nodes of internal links
2520 if ( isInside || face.IsNull() )
2522 // compute node displacement of end links in their local coord systems
2524 TChainLink& ln0 = chain.front(), ln1 = *(++chain.begin());
2525 trsf.SetTransformation( gp_Ax3( gp::Origin(), ln0.Normal(),
2526 gp_Vec( ln0->MiddlePnt(), ln1->MiddlePnt() )));
2527 move0.Transform(trsf);
2530 TChainLink& ln0 = *(++chain.rbegin()), ln1 = chain.back();
2531 trsf.SetTransformation( gp_Ax3( gp::Origin(), ln1.Normal(),
2532 gp_Vec( ln0->MiddlePnt(), ln1->MiddlePnt() )));
2533 move1.Transform(trsf);
2536 // compute displacement of medium nodes
2537 link2 = chain.begin();
2540 for ( int i = 0; link2 != chain.end(); ++link0, ++link1, ++link2, ++i )
2542 double r = linkPos[i] / chainLen;
2543 // displacement in local coord system
2544 gp_Vec move = (1. - r) * move0 + r * move1;
2545 if ( isInside || face.IsNull()) {
2546 // transform to global
2547 gp_Vec x01( (*link0)->MiddlePnt(), (*link1)->MiddlePnt() );
2548 gp_Vec x12( (*link1)->MiddlePnt(), (*link2)->MiddlePnt() );
2549 gp_Vec x = x01.Normalized() + x12.Normalized();
2550 trsf.SetTransformation( gp_Ax3( gp::Origin(), link1->Normal(), x), gp_Ax3() );
2551 move.Transform(trsf);
2554 // compute 3D displacement by 2D one
2555 Handle(Geom_Surface) s = BRep_Tool::Surface(face,loc);
2556 gp_XY oldUV = GetNodeUV( face, (*link1)->_mediumNode, 0, &checkUV);
2557 gp_XY newUV = applyIn2D( s, oldUV, gp_XY( move.X(),move.Y()), gp_XY_Added);
2558 gp_Pnt newPnt = s->Value( newUV.X(), newUV.Y());
2559 move = gp_Vec( XYZ((*link1)->_mediumNode), newPnt.Transformed(loc) );
2561 if ( (XYZ((*link1)->node1()) - XYZ((*link1)->node2())).SquareModulus() <
2562 move.SquareMagnitude())
2564 gp_XY uv0 = GetNodeUV( face, (*link0)->_mediumNode, 0, &checkUV);
2565 gp_XY uv2 = GetNodeUV( face, (*link2)->_mediumNode, 0, &checkUV);
2566 MSG( "uv0: "<<uv0.X()<<", "<<uv0.Y()<<" \t" <<
2567 "uv2: "<<uv2.X()<<", "<<uv2.Y()<<" \t" <<
2568 "uvOld: "<<oldUV.X()<<", "<<oldUV.Y()<<" \t" <<
2569 "newUV: "<<newUV.X()<<", "<<newUV.Y()<<" \t");
2573 (*link1)->Move( move );
2574 MSG( "Move " << (*link1)->_mediumNode->GetID() << " following "
2575 << chain.front()->_mediumNode->GetID() <<"-"
2576 << chain.back ()->_mediumNode->GetID() <<
2577 " by " << move.Magnitude());
2579 } // loop on chains of links
2580 } // loop on 2 directions of propagation from quadrangle
2587 for ( pLink = links.begin(); pLink != links.end(); ++pLink ) {
2588 if ( pLink->IsMoved() ) {
2589 //gp_Pnt p = pLink->MediumPnt() + pLink->Move();
2590 gp_Pnt p = pLink->MiddlePnt() + pLink->Move();
2591 GetMeshDS()->MoveNode( pLink->_mediumNode, p.X(), p.Y(), p.Z());
2596 //=======================================================================
2598 * \brief Iterator on ancestors of the given type
2600 //=======================================================================
2602 struct TAncestorsIterator : public SMDS_Iterator<const TopoDS_Shape*>
2604 TopTools_ListIteratorOfListOfShape _ancIter;
2605 TopAbs_ShapeEnum _type;
2606 TAncestorsIterator( const TopTools_ListOfShape& ancestors, TopAbs_ShapeEnum type)
2607 : _ancIter( ancestors ), _type( type )
2609 if ( _ancIter.More() && _ancIter.Value().ShapeType() != _type ) next();
2613 return _ancIter.More();
2615 virtual const TopoDS_Shape* next()
2617 const TopoDS_Shape* s = _ancIter.More() ? & _ancIter.Value() : 0;
2618 if ( _ancIter.More() )
2619 for ( _ancIter.Next(); _ancIter.More(); _ancIter.Next())
2620 if ( _ancIter.Value().ShapeType() == _type )
2626 //=======================================================================
2628 * \brief Return iterator on ancestors of the given type
2630 //=======================================================================
2632 PShapeIteratorPtr SMESH_MesherHelper::GetAncestors(const TopoDS_Shape& shape,
2633 const SMESH_Mesh& mesh,
2634 TopAbs_ShapeEnum ancestorType)
2636 return PShapeIteratorPtr( new TAncestorsIterator( mesh.GetAncestors(shape), ancestorType));