1 // Copyright (C) 2007-2008 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
22 // File: SMESH_MesherHelper.cxx
23 // Created: 15.02.06 15:22:41
24 // Author: Sergey KUUL
26 #include "SMESH_MesherHelper.hxx"
28 #include "SMDS_FacePosition.hxx"
29 #include "SMDS_EdgePosition.hxx"
30 #include "SMESH_MeshEditor.hxx"
32 #include <BRepAdaptor_Surface.hxx>
33 #include <BRepTools.hxx>
34 #include <BRep_Tool.hxx>
35 #include <BRepTools_WireExplorer.hxx>
36 #include <Geom2d_Curve.hxx>
37 #include <Geom_Curve.hxx>
38 #include <Geom_Surface.hxx>
39 #include <ShapeAnalysis.hxx>
41 #include <TopExp_Explorer.hxx>
42 #include <TopTools_ListIteratorOfListOfShape.hxx>
43 #include <TopTools_MapOfShape.hxx>
45 #include <gp_Pnt2d.hxx>
47 #include <Standard_Failure.hxx>
48 #include <Standard_ErrorHandler.hxx>
50 #include <utilities.h>
52 #define RETURN_BAD_RESULT(msg) { MESSAGE(msg); return false; }
54 //================================================================================
58 //================================================================================
60 SMESH_MesherHelper::SMESH_MesherHelper(SMESH_Mesh& theMesh)
61 : myMesh(&theMesh), myShapeID(-1), myCreateQuadratic(false)
63 mySetElemOnShape = ( ! myMesh->HasShapeToMesh() );
66 //=======================================================================
67 //function : CheckShape
69 //=======================================================================
71 bool SMESH_MesherHelper::IsQuadraticSubMesh(const TopoDS_Shape& aSh)
73 SMESHDS_Mesh* meshDS = GetMeshDS();
74 // we can create quadratic elements only if all elements
75 // created on subshapes of given shape are quadratic
76 // also we have to fill myNLinkNodeMap
77 myCreateQuadratic = true;
78 mySeamShapeIds.clear();
79 myDegenShapeIds.clear();
80 TopAbs_ShapeEnum subType( aSh.ShapeType()==TopAbs_FACE ? TopAbs_EDGE : TopAbs_FACE );
81 SMDSAbs_ElementType elemType( subType==TopAbs_FACE ? SMDSAbs_Face : SMDSAbs_Edge );
83 TopExp_Explorer exp( aSh, subType );
84 for (; exp.More() && myCreateQuadratic; exp.Next()) {
85 if ( SMESHDS_SubMesh * subMesh = meshDS->MeshElements( exp.Current() )) {
86 if ( SMDS_ElemIteratorPtr it = subMesh->GetElements() ) {
88 const SMDS_MeshElement* e = it->next();
89 if ( e->GetType() != elemType || !e->IsQuadratic() ) {
90 myCreateQuadratic = false;
95 switch ( e->NbNodes() ) {
97 AddNLinkNode(e->GetNode(0),e->GetNode(1),e->GetNode(2)); break;
99 AddNLinkNode(e->GetNode(0),e->GetNode(1),e->GetNode(3));
100 AddNLinkNode(e->GetNode(1),e->GetNode(2),e->GetNode(4));
101 AddNLinkNode(e->GetNode(2),e->GetNode(0),e->GetNode(5)); break;
103 AddNLinkNode(e->GetNode(0),e->GetNode(1),e->GetNode(4));
104 AddNLinkNode(e->GetNode(1),e->GetNode(2),e->GetNode(5));
105 AddNLinkNode(e->GetNode(2),e->GetNode(3),e->GetNode(6));
106 AddNLinkNode(e->GetNode(3),e->GetNode(0),e->GetNode(7));
109 myCreateQuadratic = false;
118 if(!myCreateQuadratic) {
119 myNLinkNodeMap.clear();
123 return myCreateQuadratic;
126 //================================================================================
128 * \brief Set geomerty to make elements on
129 * \param aSh - geomertic shape
131 //================================================================================
133 void SMESH_MesherHelper::SetSubShape(const int aShID)
135 if ( aShID == myShapeID )
138 SetSubShape( GetMeshDS()->IndexToShape( aShID ));
140 SetSubShape( TopoDS_Shape() );
143 //================================================================================
145 * \brief Set geomerty to make elements on
146 * \param aSh - geomertic shape
148 //================================================================================
150 void SMESH_MesherHelper::SetSubShape(const TopoDS_Shape& aSh)
152 if ( myShape.IsSame( aSh ))
156 mySeamShapeIds.clear();
157 myDegenShapeIds.clear();
159 if ( myShape.IsNull() ) {
163 SMESHDS_Mesh* meshDS = GetMeshDS();
164 myShapeID = meshDS->ShapeToIndex(aSh);
166 // treatment of periodic faces
167 for ( TopExp_Explorer eF( aSh, TopAbs_FACE ); eF.More(); eF.Next() )
169 const TopoDS_Face& face = TopoDS::Face( eF.Current() );
170 BRepAdaptor_Surface surface( face );
171 if ( surface.IsUPeriodic() || surface.IsVPeriodic() )
173 for (TopExp_Explorer exp( face, TopAbs_EDGE ); exp.More(); exp.Next())
175 // look for a seam edge
176 const TopoDS_Edge& edge = TopoDS::Edge( exp.Current() );
177 if ( BRep_Tool::IsClosed( edge, face )) {
178 // initialize myPar1, myPar2 and myParIndex
179 if ( mySeamShapeIds.empty() ) {
181 BRep_Tool::UVPoints( edge, face, uv1, uv2 );
182 if ( Abs( uv1.Coord(1) - uv2.Coord(1) ) < Abs( uv1.Coord(2) - uv2.Coord(2) ))
184 myParIndex = 1; // U periodic
185 myPar1 = surface.FirstUParameter();
186 myPar2 = surface.LastUParameter();
189 myParIndex = 2; // V periodic
190 myPar1 = surface.FirstVParameter();
191 myPar2 = surface.LastVParameter();
194 // store seam shape indices, negative if shape encounters twice
195 int edgeID = meshDS->ShapeToIndex( edge );
196 mySeamShapeIds.insert( IsSeamShape( edgeID ) ? -edgeID : edgeID );
197 for ( TopExp_Explorer v( edge, TopAbs_VERTEX ); v.More(); v.Next() ) {
198 int vertexID = meshDS->ShapeToIndex( v.Current() );
199 mySeamShapeIds.insert( IsSeamShape( vertexID ) ? -vertexID : vertexID );
203 // look for a degenerated edge
204 if ( BRep_Tool::Degenerated( edge )) {
205 myDegenShapeIds.insert( meshDS->ShapeToIndex( edge ));
206 for ( TopExp_Explorer v( edge, TopAbs_VERTEX ); v.More(); v.Next() )
207 myDegenShapeIds.insert( meshDS->ShapeToIndex( v.Current() ));
214 //================================================================================
216 * \brief Check if inFaceNode argument is necessary for call GetNodeUV(F,..)
217 * \param F - the face
218 * \retval bool - return true if the face is periodic
220 //================================================================================
222 bool SMESH_MesherHelper::GetNodeUVneedInFaceNode(const TopoDS_Face& F) const
224 if ( F.IsNull() ) return !mySeamShapeIds.empty();
226 if ( !F.IsNull() && !myShape.IsNull() && myShape.IsSame( F ))
227 return !mySeamShapeIds.empty();
229 Handle(Geom_Surface) aSurface = BRep_Tool::Surface( F );
230 if ( !aSurface.IsNull() )
231 return ( aSurface->IsUPeriodic() || aSurface->IsVPeriodic() );
236 //=======================================================================
237 //function : IsMedium
239 //=======================================================================
241 bool SMESH_MesherHelper::IsMedium(const SMDS_MeshNode* node,
242 const SMDSAbs_ElementType typeToCheck)
244 return SMESH_MeshEditor::IsMedium( node, typeToCheck );
247 //=======================================================================
248 //function : AddNLinkNode
250 //=======================================================================
252 * Auxilary function for filling myNLinkNodeMap
254 void SMESH_MesherHelper::AddNLinkNode(const SMDS_MeshNode* n1,
255 const SMDS_MeshNode* n2,
256 const SMDS_MeshNode* n12)
258 NLink link( n1, n2 );
259 if ( n1 > n2 ) link = NLink( n2, n1 );
260 // add new record to map
261 myNLinkNodeMap.insert( make_pair(link,n12));
264 //=======================================================================
266 * \brief Select UV on either of 2 pcurves of a seam edge, closest to the given UV
267 * \param uv1 - UV on the seam
268 * \param uv2 - UV within a face
269 * \retval gp_Pnt2d - selected UV
271 //=======================================================================
273 gp_Pnt2d SMESH_MesherHelper::GetUVOnSeam( const gp_Pnt2d& uv1, const gp_Pnt2d& uv2 ) const
275 double p1 = uv1.Coord( myParIndex );
276 double p2 = uv2.Coord( myParIndex );
277 double p3 = ( Abs( p1 - myPar1 ) < Abs( p1 - myPar2 )) ? myPar2 : myPar1;
278 if ( Abs( p2 - p1 ) > Abs( p2 - p3 ))
280 gp_Pnt2d result = uv1;
281 result.SetCoord( myParIndex, p1 );
285 //=======================================================================
287 * \brief Return node UV on face
288 * \param F - the face
289 * \param n - the node
290 * \param n2 - a node of element being created located inside a face
291 * \retval gp_XY - resulting UV
293 * Auxilary function called form GetMediumNode()
295 //=======================================================================
297 gp_XY SMESH_MesherHelper::GetNodeUV(const TopoDS_Face& F,
298 const SMDS_MeshNode* n,
299 const SMDS_MeshNode* n2) const
301 gp_Pnt2d uv( 1e100, 1e100 );
302 const SMDS_PositionPtr Pos = n->GetPosition();
303 if(Pos->GetTypeOfPosition()==SMDS_TOP_FACE)
305 // node has position on face
306 const SMDS_FacePosition* fpos =
307 static_cast<const SMDS_FacePosition*>(n->GetPosition().get());
308 uv = gp_Pnt2d(fpos->GetUParameter(),fpos->GetVParameter());
310 else if(Pos->GetTypeOfPosition()==SMDS_TOP_EDGE)
312 // node has position on edge => it is needed to find
313 // corresponding edge from face, get pcurve for this
314 // edge and recieve value from this pcurve
315 const SMDS_EdgePosition* epos =
316 static_cast<const SMDS_EdgePosition*>(n->GetPosition().get());
317 SMESHDS_Mesh* meshDS = GetMeshDS();
318 int edgeID = Pos->GetShapeId();
319 TopoDS_Edge E = TopoDS::Edge(meshDS->IndexToShape(edgeID));
321 Handle(Geom2d_Curve) C2d = BRep_Tool::CurveOnSurface(E, F, f, l);
322 uv = C2d->Value( epos->GetUParameter() );
323 // for a node on a seam edge select one of UVs on 2 pcurves
324 if ( n2 && IsSeamShape( edgeID ) )
325 uv = GetUVOnSeam( uv, GetNodeUV( F, n2, 0 ));
327 else if(Pos->GetTypeOfPosition()==SMDS_TOP_VERTEX)
329 if ( int vertexID = n->GetPosition()->GetShapeId() ) {
331 const TopoDS_Vertex& V = TopoDS::Vertex(GetMeshDS()->IndexToShape(vertexID));
333 uv = BRep_Tool::Parameters( V, F );
335 catch (Standard_Failure& exc) {
339 for ( TopExp_Explorer vert(F,TopAbs_VERTEX); !ok && vert.More(); vert.Next() )
340 ok = ( V == vert.Current() );
343 MESSAGE ( "SMESH_MesherHelper::GetNodeUV(); Vertex " << vertexID
344 << " not in face " << GetMeshDS()->ShapeToIndex( F ) );
346 // get UV of a vertex closest to the node
348 gp_Pnt pn ( n->X(),n->Y(),n->Z() );
349 for ( TopExp_Explorer vert(F,TopAbs_VERTEX); !ok && vert.More(); vert.Next() ) {
350 TopoDS_Vertex curV = TopoDS::Vertex( vert.Current() );
351 gp_Pnt p = BRep_Tool::Pnt( curV );
352 double curDist = p.SquareDistance( pn );
353 if ( curDist < dist ) {
355 uv = BRep_Tool::Parameters( curV, F );
356 if ( dist < DBL_MIN ) break;
361 TopTools_ListIteratorOfListOfShape it( myMesh->GetAncestors( V ));
362 for ( ; it.More(); it.Next() ) {
363 if ( it.Value().ShapeType() == TopAbs_EDGE ) {
364 const TopoDS_Edge & edge = TopoDS::Edge( it.Value() );
366 Handle(Geom2d_Curve) C2d = BRep_Tool::CurveOnSurface(edge, F, f, l);
367 if ( !C2d.IsNull() ) {
368 double u = ( V == TopExp::FirstVertex( edge ) ) ? f : l;
369 uv = C2d->Value( u );
376 if ( n2 && IsSeamShape( vertexID ) )
377 uv = GetUVOnSeam( uv, GetNodeUV( F, n2, 0 ));
383 //=======================================================================
385 * \brief Return node U on edge
386 * \param E - the Edge
387 * \param n - the node
388 * \retval double - resulting U
390 * Auxilary function called form GetMediumNode()
392 //=======================================================================
394 double SMESH_MesherHelper::GetNodeU(const TopoDS_Edge& E,
395 const SMDS_MeshNode* n)
398 const SMDS_PositionPtr Pos = n->GetPosition();
399 if(Pos->GetTypeOfPosition()==SMDS_TOP_EDGE) {
400 const SMDS_EdgePosition* epos =
401 static_cast<const SMDS_EdgePosition*>(n->GetPosition().get());
402 param = epos->GetUParameter();
404 else if(Pos->GetTypeOfPosition()==SMDS_TOP_VERTEX) {
405 SMESHDS_Mesh * meshDS = GetMeshDS();
406 int vertexID = n->GetPosition()->GetShapeId();
407 const TopoDS_Vertex& V = TopoDS::Vertex(meshDS->IndexToShape(vertexID));
408 param = BRep_Tool::Parameter( V, E );
413 //=======================================================================
414 //function : GetMediumNode
416 //=======================================================================
418 * Special function for search or creation medium node
420 const SMDS_MeshNode* SMESH_MesherHelper::GetMediumNode(const SMDS_MeshNode* n1,
421 const SMDS_MeshNode* n2,
424 TopAbs_ShapeEnum shapeType = myShape.IsNull() ? TopAbs_SHAPE : myShape.ShapeType();
426 NLink link(( n1 < n2 ? n1 : n2 ), ( n1 < n2 ? n2 : n1 ));
427 ItNLinkNode itLN = myNLinkNodeMap.find( link );
428 if ( itLN != myNLinkNodeMap.end() ) {
429 return (*itLN).second;
432 // create medium node
434 SMESHDS_Mesh* meshDS = GetMeshDS();
435 int faceID = -1, edgeID = -1;
436 const SMDS_PositionPtr Pos1 = n1->GetPosition();
437 const SMDS_PositionPtr Pos2 = n2->GetPosition();
439 if( myShape.IsNull() )
441 if( Pos1->GetTypeOfPosition()==SMDS_TOP_FACE ) {
442 faceID = Pos1->GetShapeId();
444 else if( Pos2->GetTypeOfPosition()==SMDS_TOP_FACE ) {
445 faceID = Pos2->GetShapeId();
448 if( Pos1->GetTypeOfPosition()==SMDS_TOP_EDGE ) {
449 edgeID = Pos1->GetShapeId();
451 if( Pos2->GetTypeOfPosition()==SMDS_TOP_EDGE ) {
452 edgeID = Pos2->GetShapeId();
457 // we try to create medium node using UV parameters of
458 // nodes, else - medium between corresponding 3d points
459 if(faceID>-1 || shapeType == TopAbs_FACE) {
460 // obtaining a face and 2d points for nodes
462 if( myShape.IsNull() )
463 F = TopoDS::Face(meshDS->IndexToShape(faceID));
465 F = TopoDS::Face(myShape);
469 gp_XY p1 = GetNodeUV(F,n1,n2);
470 gp_XY p2 = GetNodeUV(F,n2,n1);
472 if ( IsDegenShape( Pos1->GetShapeId() ))
473 p1.SetCoord( myParIndex, p2.Coord( myParIndex ));
474 else if ( IsDegenShape( Pos2->GetShapeId() ))
475 p2.SetCoord( myParIndex, p1.Coord( myParIndex ));
477 //checking if surface is periodic
478 Handle(Geom_Surface) S = BRep_Tool::Surface(F);
479 Standard_Real UF,UL,VF,VL;
480 S->Bounds(UF,UL,VF,VL);
483 Standard_Boolean isUPeriodic = S->IsUPeriodic();
485 Standard_Real UPeriod = S->UPeriod();
486 Standard_Real p2x = p2.X()+ShapeAnalysis::AdjustByPeriod(p2.X(),p1.X(),UPeriod);
487 Standard_Real pmid = (p1.X()+p2x)/2.;
488 u = pmid+ShapeAnalysis::AdjustToPeriod(pmid,UF,UL);
491 u= (p1.X()+p2.X())/2.;
493 Standard_Boolean isVPeriodic = S->IsVPeriodic();
495 Standard_Real VPeriod = S->VPeriod();
496 Standard_Real p2y = p2.Y()+ShapeAnalysis::AdjustByPeriod(p2.Y(),p1.Y(),VPeriod);
497 Standard_Real pmid = (p1.Y()+p2y)/2.;
498 v = pmid+ShapeAnalysis::AdjustToPeriod(pmid,VF,VL);
501 v = (p1.Y()+p2.Y())/2.;
503 gp_Pnt P = S->Value(u, v);
504 n12 = meshDS->AddNode(P.X(), P.Y(), P.Z());
505 meshDS->SetNodeOnFace(n12, faceID, u, v);
506 myNLinkNodeMap.insert(NLinkNodeMap::value_type(link,n12));
509 if (edgeID>-1 || shapeType == TopAbs_EDGE) {
512 if( myShape.IsNull() )
513 E = TopoDS::Edge(meshDS->IndexToShape(edgeID));
515 E = TopoDS::Edge(myShape);
519 double p1 = GetNodeU(E,n1);
520 double p2 = GetNodeU(E,n2);
523 Handle(Geom_Curve) C = BRep_Tool::Curve(E, f, l);
526 Standard_Boolean isPeriodic = C->IsPeriodic();
529 Standard_Real Period = C->Period();
530 Standard_Real p = p2+ShapeAnalysis::AdjustByPeriod(p2,p1,Period);
531 Standard_Real pmid = (p1+p)/2.;
532 u = pmid+ShapeAnalysis::AdjustToPeriod(pmid,C->FirstParameter(),C->LastParameter());
537 gp_Pnt P = C->Value( u );
538 n12 = meshDS->AddNode(P.X(), P.Y(), P.Z());
539 meshDS->SetNodeOnEdge(n12, edgeID, u);
540 myNLinkNodeMap.insert(NLinkNodeMap::value_type(link,n12));
546 double x = ( n1->X() + n2->X() )/2.;
547 double y = ( n1->Y() + n2->Y() )/2.;
548 double z = ( n1->Z() + n2->Z() )/2.;
549 n12 = meshDS->AddNode(x,y,z);
551 meshDS->SetNodeOnEdge(n12, edgeID);
553 meshDS->SetNodeOnFace(n12, faceID);
555 meshDS->SetNodeInVolume(n12, myShapeID);
556 myNLinkNodeMap.insert(NLinkNodeMap::value_type(link,n12));
561 //=======================================================================
565 //=======================================================================
567 SMDS_MeshNode* SMESH_MesherHelper::AddNode(double x, double y, double z, int ID)
569 SMESHDS_Mesh * meshDS = GetMeshDS();
570 SMDS_MeshNode* node = 0;
572 node = meshDS->AddNodeWithID( x, y, z, ID );
574 node = meshDS->AddNode( x, y, z );
575 if ( mySetElemOnShape && myShapeID > 0 ) {
576 switch ( myShape.ShapeType() ) {
577 case TopAbs_SOLID: meshDS->SetNodeInVolume( node, myShapeID); break;
578 case TopAbs_SHELL: meshDS->SetNodeInVolume( node, myShapeID); break;
579 case TopAbs_FACE: meshDS->SetNodeOnFace( node, myShapeID); break;
580 case TopAbs_EDGE: meshDS->SetNodeOnEdge( node, myShapeID); break;
581 case TopAbs_VERTEX: meshDS->SetNodeOnVertex( node, myShapeID); break;
588 //=======================================================================
590 * Creates quadratic or linear edge
592 //=======================================================================
594 SMDS_MeshEdge* SMESH_MesherHelper::AddEdge(const SMDS_MeshNode* n1,
595 const SMDS_MeshNode* n2,
599 SMESHDS_Mesh * meshDS = GetMeshDS();
601 SMDS_MeshEdge* edge = 0;
602 if (myCreateQuadratic) {
603 const SMDS_MeshNode* n12 = GetMediumNode(n1,n2,force3d);
605 edge = meshDS->AddEdgeWithID(n1, n2, n12, id);
607 edge = meshDS->AddEdge(n1, n2, n12);
611 edge = meshDS->AddEdgeWithID(n1, n2, id);
613 edge = meshDS->AddEdge(n1, n2);
616 if ( mySetElemOnShape && myShapeID > 0 )
617 meshDS->SetMeshElementOnShape( edge, myShapeID );
622 //=======================================================================
624 * Creates quadratic or linear triangle
626 //=======================================================================
628 SMDS_MeshFace* SMESH_MesherHelper::AddFace(const SMDS_MeshNode* n1,
629 const SMDS_MeshNode* n2,
630 const SMDS_MeshNode* n3,
634 SMESHDS_Mesh * meshDS = GetMeshDS();
635 SMDS_MeshFace* elem = 0;
636 if(!myCreateQuadratic) {
638 elem = meshDS->AddFaceWithID(n1, n2, n3, id);
640 elem = meshDS->AddFace(n1, n2, n3);
643 const SMDS_MeshNode* n12 = GetMediumNode(n1,n2,force3d);
644 const SMDS_MeshNode* n23 = GetMediumNode(n2,n3,force3d);
645 const SMDS_MeshNode* n31 = GetMediumNode(n3,n1,force3d);
648 elem = meshDS->AddFaceWithID(n1, n2, n3, n12, n23, n31, id);
650 elem = meshDS->AddFace(n1, n2, n3, n12, n23, n31);
652 if ( mySetElemOnShape && myShapeID > 0 )
653 meshDS->SetMeshElementOnShape( elem, myShapeID );
658 //=======================================================================
660 * Creates quadratic or linear quadrangle
662 //=======================================================================
664 SMDS_MeshFace* SMESH_MesherHelper::AddFace(const SMDS_MeshNode* n1,
665 const SMDS_MeshNode* n2,
666 const SMDS_MeshNode* n3,
667 const SMDS_MeshNode* n4,
671 SMESHDS_Mesh * meshDS = GetMeshDS();
672 SMDS_MeshFace* elem = 0;
673 if(!myCreateQuadratic) {
675 elem = meshDS->AddFaceWithID(n1, n2, n3, n4, id);
677 elem = meshDS->AddFace(n1, n2, n3, n4);
680 const SMDS_MeshNode* n12 = GetMediumNode(n1,n2,force3d);
681 const SMDS_MeshNode* n23 = GetMediumNode(n2,n3,force3d);
682 const SMDS_MeshNode* n34 = GetMediumNode(n3,n4,force3d);
683 const SMDS_MeshNode* n41 = GetMediumNode(n4,n1,force3d);
686 elem = meshDS->AddFaceWithID(n1, n2, n3, n4, n12, n23, n34, n41, id);
688 elem = meshDS->AddFace(n1, n2, n3, n4, n12, n23, n34, n41);
690 if ( mySetElemOnShape && myShapeID > 0 )
691 meshDS->SetMeshElementOnShape( elem, myShapeID );
696 //=======================================================================
698 * Creates quadratic or linear volume
700 //=======================================================================
702 SMDS_MeshVolume* SMESH_MesherHelper::AddVolume(const SMDS_MeshNode* n1,
703 const SMDS_MeshNode* n2,
704 const SMDS_MeshNode* n3,
705 const SMDS_MeshNode* n4,
706 const SMDS_MeshNode* n5,
707 const SMDS_MeshNode* n6,
711 SMESHDS_Mesh * meshDS = GetMeshDS();
712 SMDS_MeshVolume* elem = 0;
713 if(!myCreateQuadratic) {
715 elem = meshDS->AddVolumeWithID(n1, n2, n3, n4, n5, n6, id);
717 elem = meshDS->AddVolume(n1, n2, n3, n4, n5, n6);
720 const SMDS_MeshNode* n12 = GetMediumNode(n1,n2,force3d);
721 const SMDS_MeshNode* n23 = GetMediumNode(n2,n3,force3d);
722 const SMDS_MeshNode* n31 = GetMediumNode(n3,n1,force3d);
724 const SMDS_MeshNode* n45 = GetMediumNode(n4,n5,force3d);
725 const SMDS_MeshNode* n56 = GetMediumNode(n5,n6,force3d);
726 const SMDS_MeshNode* n64 = GetMediumNode(n6,n4,force3d);
728 const SMDS_MeshNode* n14 = GetMediumNode(n1,n4,force3d);
729 const SMDS_MeshNode* n25 = GetMediumNode(n2,n5,force3d);
730 const SMDS_MeshNode* n36 = GetMediumNode(n3,n6,force3d);
733 elem = meshDS->AddVolumeWithID(n1, n2, n3, n4, n5, n6,
734 n12, n23, n31, n45, n56, n64, n14, n25, n36, id);
736 elem = meshDS->AddVolume(n1, n2, n3, n4, n5, n6,
737 n12, n23, n31, n45, n56, n64, n14, n25, n36);
739 if ( mySetElemOnShape && myShapeID > 0 )
740 meshDS->SetMeshElementOnShape( elem, myShapeID );
745 //=======================================================================
747 * Creates quadratic or linear volume
749 //=======================================================================
751 SMDS_MeshVolume* SMESH_MesherHelper::AddVolume(const SMDS_MeshNode* n1,
752 const SMDS_MeshNode* n2,
753 const SMDS_MeshNode* n3,
754 const SMDS_MeshNode* n4,
758 SMESHDS_Mesh * meshDS = GetMeshDS();
759 SMDS_MeshVolume* elem = 0;
760 if(!myCreateQuadratic) {
762 elem = meshDS->AddVolumeWithID(n1, n2, n3, n4, id);
764 elem = meshDS->AddVolume(n1, n2, n3, n4);
767 const SMDS_MeshNode* n12 = GetMediumNode(n1,n2,force3d);
768 const SMDS_MeshNode* n23 = GetMediumNode(n2,n3,force3d);
769 const SMDS_MeshNode* n31 = GetMediumNode(n3,n1,force3d);
771 const SMDS_MeshNode* n14 = GetMediumNode(n1,n4,force3d);
772 const SMDS_MeshNode* n24 = GetMediumNode(n2,n4,force3d);
773 const SMDS_MeshNode* n34 = GetMediumNode(n3,n4,force3d);
776 elem = meshDS->AddVolumeWithID(n1, n2, n3, n4, n12, n23, n31, n14, n24, n34, id);
778 elem = meshDS->AddVolume(n1, n2, n3, n4, n12, n23, n31, n14, n24, n34);
780 if ( mySetElemOnShape && myShapeID > 0 )
781 meshDS->SetMeshElementOnShape( elem, myShapeID );
786 //=======================================================================
788 * Creates quadratic or linear pyramid
790 //=======================================================================
792 SMDS_MeshVolume* SMESH_MesherHelper::AddVolume(const SMDS_MeshNode* n1,
793 const SMDS_MeshNode* n2,
794 const SMDS_MeshNode* n3,
795 const SMDS_MeshNode* n4,
796 const SMDS_MeshNode* n5,
800 SMDS_MeshVolume* elem = 0;
801 if(!myCreateQuadratic) {
803 elem = GetMeshDS()->AddVolumeWithID(n1, n2, n3, n4, n5, id);
805 elem = GetMeshDS()->AddVolume(n1, n2, n3, n4, n5);
808 const SMDS_MeshNode* n12 = GetMediumNode(n1,n2,force3d);
809 const SMDS_MeshNode* n23 = GetMediumNode(n2,n3,force3d);
810 const SMDS_MeshNode* n34 = GetMediumNode(n3,n4,force3d);
811 const SMDS_MeshNode* n41 = GetMediumNode(n4,n1,force3d);
813 const SMDS_MeshNode* n15 = GetMediumNode(n1,n5,force3d);
814 const SMDS_MeshNode* n25 = GetMediumNode(n2,n5,force3d);
815 const SMDS_MeshNode* n35 = GetMediumNode(n3,n5,force3d);
816 const SMDS_MeshNode* n45 = GetMediumNode(n4,n5,force3d);
819 elem = GetMeshDS()->AddVolumeWithID ( n1, n2, n3, n4, n5,
824 elem = GetMeshDS()->AddVolume( n1, n2, n3, n4, n5,
828 if ( mySetElemOnShape && myShapeID > 0 )
829 GetMeshDS()->SetMeshElementOnShape( elem, myShapeID );
834 //=======================================================================
836 * Creates quadratic or linear hexahedron
838 //=======================================================================
840 SMDS_MeshVolume* SMESH_MesherHelper::AddVolume(const SMDS_MeshNode* n1,
841 const SMDS_MeshNode* n2,
842 const SMDS_MeshNode* n3,
843 const SMDS_MeshNode* n4,
844 const SMDS_MeshNode* n5,
845 const SMDS_MeshNode* n6,
846 const SMDS_MeshNode* n7,
847 const SMDS_MeshNode* n8,
851 SMESHDS_Mesh * meshDS = GetMeshDS();
852 SMDS_MeshVolume* elem = 0;
853 if(!myCreateQuadratic) {
855 elem = meshDS->AddVolumeWithID(n1, n2, n3, n4, n5, n6, n7, n8, id);
857 elem = meshDS->AddVolume(n1, n2, n3, n4, n5, n6, n7, n8);
860 const SMDS_MeshNode* n12 = GetMediumNode(n1,n2,force3d);
861 const SMDS_MeshNode* n23 = GetMediumNode(n2,n3,force3d);
862 const SMDS_MeshNode* n34 = GetMediumNode(n3,n4,force3d);
863 const SMDS_MeshNode* n41 = GetMediumNode(n4,n1,force3d);
865 const SMDS_MeshNode* n56 = GetMediumNode(n5,n6,force3d);
866 const SMDS_MeshNode* n67 = GetMediumNode(n6,n7,force3d);
867 const SMDS_MeshNode* n78 = GetMediumNode(n7,n8,force3d);
868 const SMDS_MeshNode* n85 = GetMediumNode(n8,n5,force3d);
870 const SMDS_MeshNode* n15 = GetMediumNode(n1,n5,force3d);
871 const SMDS_MeshNode* n26 = GetMediumNode(n2,n6,force3d);
872 const SMDS_MeshNode* n37 = GetMediumNode(n3,n7,force3d);
873 const SMDS_MeshNode* n48 = GetMediumNode(n4,n8,force3d);
876 elem = meshDS->AddVolumeWithID(n1, n2, n3, n4, n5, n6, n7, n8,
877 n12, n23, n34, n41, n56, n67,
878 n78, n85, n15, n26, n37, n48, id);
880 elem = meshDS->AddVolume(n1, n2, n3, n4, n5, n6, n7, n8,
881 n12, n23, n34, n41, n56, n67,
882 n78, n85, n15, n26, n37, n48);
884 if ( mySetElemOnShape && myShapeID > 0 )
885 meshDS->SetMeshElementOnShape( elem, myShapeID );
890 //=======================================================================
892 * \brief Load nodes bound to face into a map of node columns
893 * \param theParam2ColumnMap - map of node columns to fill
894 * \param theFace - the face on which nodes are searched for
895 * \param theBaseEdge - the edge nodes of which are columns' bases
896 * \param theMesh - the mesh containing nodes
897 * \retval bool - false if something is wrong
899 * The key of the map is a normalized parameter of each
900 * base node on theBaseEdge.
901 * This method works in supposition that nodes on the face
902 * forms a rectangular grid and elements can be quardrangles or triangles
904 //=======================================================================
906 bool SMESH_MesherHelper::LoadNodeColumns(TParam2ColumnMap & theParam2ColumnMap,
907 const TopoDS_Face& theFace,
908 const TopoDS_Edge& theBaseEdge,
909 SMESHDS_Mesh* theMesh)
911 // get vertices of theBaseEdge
912 TopoDS_Vertex vfb, vlb, vft; // first and last, bottom and top vertices
913 TopoDS_Edge eFrw = TopoDS::Edge( theBaseEdge.Oriented( TopAbs_FORWARD ));
914 TopExp::Vertices( eFrw, vfb, vlb );
916 // find the other edges of theFace and orientation of e1
917 TopoDS_Edge e1, e2, eTop;
918 bool rev1, CumOri = false;
919 TopExp_Explorer exp( theFace, TopAbs_EDGE );
921 for ( ; exp.More(); exp.Next() ) {
922 if ( ++nbEdges > 4 ) {
923 return false; // more than 4 edges in theFace
925 TopoDS_Edge e = TopoDS::Edge( exp.Current() );
926 if ( theBaseEdge.IsSame( e ))
928 TopoDS_Vertex vCommon;
929 if ( !TopExp::CommonVertex( theBaseEdge, e, vCommon ))
931 else if ( vCommon.IsSame( vfb )) {
933 vft = TopExp::LastVertex( e1, CumOri );
934 rev1 = vfb.IsSame( vft );
936 vft = TopExp::FirstVertex( e1, CumOri );
942 return false; // less than 4 edges in theFace
944 if ( e2.IsNull() && vfb.IsSame( vlb ))
947 // submeshes corresponding to shapes
948 SMESHDS_SubMesh* smFace = theMesh->MeshElements( theFace );
949 SMESHDS_SubMesh* smb = theMesh->MeshElements( theBaseEdge );
950 SMESHDS_SubMesh* smt = theMesh->MeshElements( eTop );
951 SMESHDS_SubMesh* sm1 = theMesh->MeshElements( e1 );
952 SMESHDS_SubMesh* sm2 = theMesh->MeshElements( e2 );
953 SMESHDS_SubMesh* smVfb = theMesh->MeshElements( vfb );
954 SMESHDS_SubMesh* smVlb = theMesh->MeshElements( vlb );
955 SMESHDS_SubMesh* smVft = theMesh->MeshElements( vft );
956 if (!smFace || !smb || !smt || !sm1 || !sm2 || !smVfb || !smVlb || !smVft ) {
957 RETURN_BAD_RESULT( "NULL submesh " <<smFace<<" "<<smb<<" "<<smt<<" "<<
958 sm1<<" "<<sm2<<" "<<smVfb<<" "<<smVlb<<" "<<smVft);
960 if ( smb->NbNodes() != smt->NbNodes() || sm1->NbNodes() != sm2->NbNodes() ) {
961 RETURN_BAD_RESULT(" Diff nb of nodes on opposite edges" );
963 if (smVfb->NbNodes() != 1 || smVlb->NbNodes() != 1 || smVft->NbNodes() != 1) {
964 RETURN_BAD_RESULT("Empty submesh of vertex");
966 // define whether mesh is quadratic
967 bool isQuadraticMesh = false;
968 SMDS_ElemIteratorPtr eIt = smFace->GetElements();
969 if ( !eIt->more() ) {
970 RETURN_BAD_RESULT("No elements on the face");
972 const SMDS_MeshElement* e = eIt->next();
973 isQuadraticMesh = e->IsQuadratic();
975 if ( sm1->NbNodes() * smb->NbNodes() != smFace->NbNodes() ) {
976 // check quadratic case
977 if ( isQuadraticMesh ) {
978 // what if there are quadrangles and triangles mixed?
979 // int n1 = sm1->NbNodes()/2;
980 // int n2 = smb->NbNodes()/2;
981 // int n3 = sm1->NbNodes() - n1;
982 // int n4 = smb->NbNodes() - n2;
983 // int nf = sm1->NbNodes()*smb->NbNodes() - n3*n4;
984 // if( nf != smFace->NbNodes() ) {
985 // MESSAGE( "Wrong nb face nodes: " <<
986 // sm1->NbNodes()<<" "<<smb->NbNodes()<<" "<<smFace->NbNodes());
991 RETURN_BAD_RESULT( "Wrong nb face nodes: " <<
992 sm1->NbNodes()<<" "<<smb->NbNodes()<<" "<<smFace->NbNodes());
996 int vsize = sm1->NbNodes() + 2;
997 int hsize = smb->NbNodes() + 2;
998 if(isQuadraticMesh) {
999 vsize = vsize - sm1->NbNodes()/2 -1;
1000 hsize = hsize - smb->NbNodes()/2 -1;
1003 // load nodes from theBaseEdge
1005 std::set<const SMDS_MeshNode*> loadedNodes;
1006 const SMDS_MeshNode* nullNode = 0;
1008 std::vector<const SMDS_MeshNode*> & nVecf = theParam2ColumnMap[ 0.];
1009 nVecf.resize( vsize, nullNode );
1010 loadedNodes.insert( nVecf[ 0 ] = smVfb->GetNodes()->next() );
1012 std::vector<const SMDS_MeshNode*> & nVecl = theParam2ColumnMap[ 1.];
1013 nVecl.resize( vsize, nullNode );
1014 loadedNodes.insert( nVecl[ 0 ] = smVlb->GetNodes()->next() );
1017 BRep_Tool::Range( eFrw, f, l );
1018 double range = l - f;
1019 SMDS_NodeIteratorPtr nIt = smb->GetNodes();
1020 const SMDS_MeshNode* node;
1021 while ( nIt->more() ) {
1023 if(IsMedium(node, SMDSAbs_Edge))
1025 const SMDS_EdgePosition* pos =
1026 dynamic_cast<const SMDS_EdgePosition*>( node->GetPosition().get() );
1030 double u = ( pos->GetUParameter() - f ) / range;
1031 std::vector<const SMDS_MeshNode*> & nVec = theParam2ColumnMap[ u ];
1032 nVec.resize( vsize, nullNode );
1033 loadedNodes.insert( nVec[ 0 ] = node );
1035 if ( theParam2ColumnMap.size() != hsize ) {
1036 RETURN_BAD_RESULT( "Wrong node positions on theBaseEdge" );
1039 // load nodes from e1
1041 std::map< double, const SMDS_MeshNode*> sortedNodes; // sort by param on edge
1042 nIt = sm1->GetNodes();
1043 while ( nIt->more() ) {
1047 const SMDS_EdgePosition* pos =
1048 dynamic_cast<const SMDS_EdgePosition*>( node->GetPosition().get() );
1052 sortedNodes.insert( std::make_pair( pos->GetUParameter(), node ));
1054 loadedNodes.insert( nVecf[ vsize - 1 ] = smVft->GetNodes()->next() );
1055 std::map< double, const SMDS_MeshNode*>::iterator u_n = sortedNodes.begin();
1056 int row = rev1 ? vsize - 1 : 0;
1057 int dRow = rev1 ? -1 : +1;
1058 for ( ; u_n != sortedNodes.end(); u_n++ ) {
1060 loadedNodes.insert( nVecf[ row ] = u_n->second );
1063 // try to load the rest nodes
1065 // get all faces from theFace
1066 TIDSortedElemSet allFaces, foundFaces;
1067 eIt = smFace->GetElements();
1068 while ( eIt->more() ) {
1069 const SMDS_MeshElement* e = eIt->next();
1070 if ( e->GetType() == SMDSAbs_Face )
1071 allFaces.insert( e );
1073 // Starting from 2 neighbour nodes on theBaseEdge, look for a face
1074 // the nodes belong to, and between the nodes of the found face,
1075 // look for a not loaded node considering this node to be the next
1076 // in a column of the starting second node. Repeat, starting
1077 // from nodes next to the previous starting nodes in their columns,
1078 // and so on while a face can be found. Then go the the next pair
1079 // of nodes on theBaseEdge.
1080 TParam2ColumnMap::iterator par_nVec_1 = theParam2ColumnMap.begin();
1081 TParam2ColumnMap::iterator par_nVec_2 = par_nVec_1;
1084 for ( par_nVec_2++; par_nVec_2 != theParam2ColumnMap.end(); par_nVec_1++, par_nVec_2++ ) {
1087 const SMDS_MeshNode* n1 = par_nVec_1->second[ row ];
1088 const SMDS_MeshNode* n2 = par_nVec_2->second[ row ];
1089 const SMDS_MeshElement* face = 0;
1090 bool lastColOnClosedFace = ( nVecf[ row ] == n2 );
1092 // look for a face by 2 nodes
1093 face = SMESH_MeshEditor::FindFaceInSet( n1, n2, allFaces, foundFaces );
1095 int nbFaceNodes = face->NbNodes();
1096 if ( face->IsQuadratic() )
1098 if ( nbFaceNodes>4 ) {
1099 RETURN_BAD_RESULT(" Too many nodes in a face: " << nbFaceNodes );
1101 // look for a not loaded node of the <face>
1103 const SMDS_MeshNode* n3 = 0; // a node defferent from n1 and n2
1104 for ( int i = 0; i < nbFaceNodes && !found; ++i ) {
1105 node = face->GetNode( i );
1106 found = loadedNodes.insert( node ).second;
1107 if ( !found && node != n1 && node != n2 )
1110 if ( lastColOnClosedFace && row + 1 < vsize ) {
1111 node = nVecf[ row + 1 ];
1112 found = ( face->GetNodeIndex( node ) >= 0 );
1115 if ( ++row > vsize - 1 ) {
1116 RETURN_BAD_RESULT( "Too many nodes in column "<< col <<": "<< row+1);
1118 par_nVec_2->second[ row ] = node;
1119 foundFaces.insert( face );
1121 if ( nbFaceNodes==4 ) {
1122 n1 = par_nVec_1->second[ row ];
1125 else if ( nbFaceNodes==3 && n3 == par_nVec_1->second[ row + 1 ] ) {
1129 RETURN_BAD_RESULT( "Not quad mesh, column "<< col );
1133 while ( face && n1 && n2 );
1135 if ( row < vsize - 1 ) {
1136 MESSAGE( "Too few nodes in column "<< col <<": "<< row+1);
1137 MESSAGE( "Base node 1: "<< par_nVec_1->second[0]);
1138 MESSAGE( "Base node 2: "<< par_nVec_2->second[0]);
1139 if ( n1 ) { MESSAGE( "Current node 1: "<< n1); }
1140 else { MESSAGE( "Current node 1: NULL"); }
1141 if ( n2 ) { MESSAGE( "Current node 2: "<< n2); }
1142 else { MESSAGE( "Current node 2: NULL"); }
1143 MESSAGE( "first base node: "<< theParam2ColumnMap.begin()->second[0]);
1144 MESSAGE( "last base node: "<< theParam2ColumnMap.rbegin()->second[0]);
1147 } // loop on columns
1152 //=======================================================================
1154 * \brief Return number of unique ancestors of the shape
1156 //=======================================================================
1158 int SMESH_MesherHelper::NbAncestors(const TopoDS_Shape& shape,
1159 const SMESH_Mesh& mesh,
1160 TopAbs_ShapeEnum ancestorType/*=TopAbs_SHAPE*/)
1162 TopTools_MapOfShape ancestors;
1163 TopTools_ListIteratorOfListOfShape ansIt( mesh.GetAncestors(shape) );
1164 for ( ; ansIt.More(); ansIt.Next() ) {
1165 if ( ancestorType == TopAbs_SHAPE || ansIt.Value().ShapeType() == ancestorType )
1166 ancestors.Add( ansIt.Value() );
1168 return ancestors.Extent();
1171 //=======================================================================
1173 * Check mesh without geometry for: if all elements on this shape are quadratic,
1174 * quadratic elements will be created.
1175 * Used then generated 3D mesh without geometry.
1177 //=======================================================================
1179 SMESH_MesherHelper:: MType SMESH_MesherHelper::IsQuadraticMesh()
1181 int NbAllEdgsAndFaces=0;
1182 int NbQuadFacesAndEdgs=0;
1183 int NbFacesAndEdges=0;
1184 //All faces and edges
1185 NbAllEdgsAndFaces = myMesh->NbEdges() + myMesh->NbFaces();
1187 //Quadratic faces and edges
1188 NbQuadFacesAndEdgs = myMesh->NbEdges(ORDER_QUADRATIC) + myMesh->NbFaces(ORDER_QUADRATIC);
1190 //Linear faces and edges
1191 NbFacesAndEdges = myMesh->NbEdges(ORDER_LINEAR) + myMesh->NbFaces(ORDER_LINEAR);
1193 if (NbAllEdgsAndFaces == NbQuadFacesAndEdgs) {
1195 return SMESH_MesherHelper::QUADRATIC;
1197 else if (NbAllEdgsAndFaces == NbFacesAndEdges) {
1199 return SMESH_MesherHelper::LINEAR;
1202 //Mesh with both type of elements
1203 return SMESH_MesherHelper::COMP;
1206 //=======================================================================
1208 * \brief Return an alternative parameter for a node on seam
1210 //=======================================================================
1212 double SMESH_MesherHelper::GetOtherParam(const double param) const
1214 return fabs(param-myPar1) < fabs(param-myPar2) ? myPar2 : myPar1;