1 // Copyright (C) 2007-2016 CEA/DEN, EDF R&D, OPEN CASCADE
3 // Copyright (C) 2003-2007 OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
4 // CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS
6 // This library is free software; you can redistribute it and/or
7 // modify it under the terms of the GNU Lesser General Public
8 // License as published by the Free Software Foundation; either
9 // version 2.1 of the License, or (at your option) any later version.
11 // This library is distributed in the hope that it will be useful,
12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 // Lesser General Public License for more details.
16 // You should have received a copy of the GNU Lesser General Public
17 // License along with this library; if not, write to the Free Software
18 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 // See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
23 // NETGENPlugin : C++ implementation
24 // File : NETGENPlugin_Mesher.cxx
25 // Author : Michael Sazonov (OCN)
28 //=============================================================================
30 #include "NETGENPlugin_Mesher.hxx"
31 #include "NETGENPlugin_Hypothesis_2D.hxx"
32 #include "NETGENPlugin_SimpleHypothesis_3D.hxx"
34 #include <SMDS_FaceOfNodes.hxx>
35 #include <SMDS_LinearEdge.hxx>
36 #include <SMDS_MeshElement.hxx>
37 #include <SMDS_MeshNode.hxx>
38 #include <SMESHDS_Mesh.hxx>
39 #include <SMESH_Block.hxx>
40 #include <SMESH_Comment.hxx>
41 #include <SMESH_ComputeError.hxx>
42 #include <SMESH_ControlPnt.hxx>
43 #include <SMESH_File.hxx>
44 #include <SMESH_Gen_i.hxx>
45 #include <SMESH_Mesh.hxx>
46 #include <SMESH_MesherHelper.hxx>
47 #include <SMESH_subMesh.hxx>
48 #include <StdMeshers_QuadToTriaAdaptor.hxx>
49 #include <StdMeshers_ViscousLayers2D.hxx>
51 #include <SALOMEDS_Tool.hxx>
53 #include <utilities.h>
55 #include <BRepAdaptor_Surface.hxx>
56 #include <BRepBuilderAPI_Copy.hxx>
57 #include <BRepLProp_SLProps.hxx>
58 #include <BRepMesh_IncrementalMesh.hxx>
59 #include <BRep_Builder.hxx>
60 #include <BRep_Tool.hxx>
61 #include <Bnd_B3d.hxx>
62 #include <GeomLib_IsPlanarSurface.hxx>
63 #include <NCollection_Map.hxx>
64 #include <Poly_Triangulation.hxx>
65 #include <Standard_ErrorHandler.hxx>
66 #include <Standard_ProgramError.hxx>
67 #include <TColStd_MapOfInteger.hxx>
69 #include <TopExp_Explorer.hxx>
70 #include <TopLoc_Location.hxx>
71 #include <TopTools_DataMapIteratorOfDataMapOfShapeInteger.hxx>
72 #include <TopTools_DataMapIteratorOfDataMapOfShapeShape.hxx>
73 #include <TopTools_DataMapOfShapeInteger.hxx>
74 #include <TopTools_DataMapOfShapeShape.hxx>
75 #include <TopTools_MapOfShape.hxx>
77 #include <TopoDS_Compound.hxx>
79 // Netgen include files
83 #include <occgeom.hpp>
84 #include <meshing.hpp>
85 //#include <ngexception.hpp>
88 extern int OCCGenerateMesh (OCCGeometry&, Mesh*&, MeshingParameters&, int, int);
90 extern int OCCGenerateMesh (OCCGeometry&, Mesh*&, int, int, char*);
92 //extern void OCCSetLocalMeshSize(OCCGeometry & geom, Mesh & mesh);
93 #if defined(NETGEN_V5) && defined(WIN32)
96 extern MeshingParameters mparam;
97 #if defined(NETGEN_V5) && defined(WIN32)
100 extern volatile multithreadt multithread;
102 #if defined(NETGEN_V5) && defined(WIN32)
105 extern bool merge_solids;
107 // values used for occgeo.facemeshstatus
108 enum EFaceMeshStatus { FACE_NOT_TREATED = 0,
120 using namespace nglib;
124 #define nodeVec_ACCESS(index) ((SMDS_MeshNode*) nodeVec.at((index)))
126 #define nodeVec_ACCESS(index) ((SMDS_MeshNode*) nodeVec[index])
129 #define NGPOINT_COORDS(p) p(0),p(1),p(2)
132 // dump elements added to ng mesh
133 //#define DUMP_SEGMENTS
134 //#define DUMP_TRIANGLES
135 //#define DUMP_TRIANGLES_SCRIPT "/tmp/trias.py" //!< debug AddIntVerticesInSolids()
138 TopTools_IndexedMapOfShape ShapesWithLocalSize;
139 std::map<int,double> VertexId2LocalSize;
140 std::map<int,double> EdgeId2LocalSize;
141 std::map<int,double> FaceId2LocalSize;
142 std::map<int,double> SolidId2LocalSize;
144 std::vector<SMESHUtils::ControlPnt> ControlPoints;
145 std::set<int> ShapesWithControlPoints; // <-- allows calling SetLocalSize() several times w/o recomputing ControlPoints
147 //=============================================================================
151 //=============================================================================
153 NETGENPlugin_Mesher::NETGENPlugin_Mesher (SMESH_Mesh* mesh,
154 const TopoDS_Shape& aShape,
160 _fineness(NETGENPlugin_Hypothesis::GetDefaultFineness()),
161 _isViscousLayers2D(false),
162 _chordalError(-1), // means disabled
169 _viscousLayersHyp(NULL),
172 SetDefaultParameters();
173 ShapesWithLocalSize.Clear();
174 VertexId2LocalSize.clear();
175 EdgeId2LocalSize.clear();
176 FaceId2LocalSize.clear();
177 SolidId2LocalSize.clear();
178 ControlPoints.clear();
179 ShapesWithControlPoints.clear();
182 //================================================================================
186 //================================================================================
188 NETGENPlugin_Mesher::~NETGENPlugin_Mesher()
196 //================================================================================
198 * Set pointer to NETGENPlugin_Mesher* field of the holder, that will be
199 * nullified at destruction of this
201 //================================================================================
203 void NETGENPlugin_Mesher::SetSelfPointer( NETGENPlugin_Mesher ** ptr )
214 //================================================================================
216 * \brief Initialize global NETGEN parameters with default values
218 //================================================================================
220 void NETGENPlugin_Mesher::SetDefaultParameters()
222 netgen::MeshingParameters& mparams = netgen::mparam;
223 // maximal mesh edge size
224 mparams.maxh = 0;//NETGENPlugin_Hypothesis::GetDefaultMaxSize();
226 // minimal number of segments per edge
227 mparams.segmentsperedge = NETGENPlugin_Hypothesis::GetDefaultNbSegPerEdge();
228 // rate of growth of size between elements
229 mparams.grading = NETGENPlugin_Hypothesis::GetDefaultGrowthRate();
230 // safety factor for curvatures (elements per radius)
231 mparams.curvaturesafety = NETGENPlugin_Hypothesis::GetDefaultNbSegPerRadius();
232 // create elements of second order
233 mparams.secondorder = NETGENPlugin_Hypothesis::GetDefaultSecondOrder();
234 // quad-dominated surface meshing
238 mparams.quad = NETGENPlugin_Hypothesis_2D::GetDefaultQuadAllowed();
239 _fineness = NETGENPlugin_Hypothesis::GetDefaultFineness();
240 mparams.uselocalh = NETGENPlugin_Hypothesis::GetDefaultSurfaceCurvature();
241 netgen::merge_solids = NETGENPlugin_Hypothesis::GetDefaultFuseEdges();
244 //=============================================================================
248 //=============================================================================
250 void SetLocalSize(TopoDS_Shape GeomShape, double LocalSize)
252 if ( GeomShape.IsNull() ) return;
253 TopAbs_ShapeEnum GeomType = GeomShape.ShapeType();
254 if (GeomType == TopAbs_COMPOUND) {
255 for (TopoDS_Iterator it (GeomShape); it.More(); it.Next()) {
256 SetLocalSize(it.Value(), LocalSize);
261 if (! ShapesWithLocalSize.Contains(GeomShape))
262 key = ShapesWithLocalSize.Add(GeomShape);
264 key = ShapesWithLocalSize.FindIndex(GeomShape);
265 if (GeomType == TopAbs_VERTEX) {
266 VertexId2LocalSize[key] = LocalSize;
267 } else if (GeomType == TopAbs_EDGE) {
268 EdgeId2LocalSize[key] = LocalSize;
269 } else if (GeomType == TopAbs_FACE) {
270 FaceId2LocalSize[key] = LocalSize;
271 } else if (GeomType == TopAbs_SOLID) {
272 SolidId2LocalSize[key] = LocalSize;
276 //=============================================================================
278 * Pass parameters to NETGEN
280 //=============================================================================
281 void NETGENPlugin_Mesher::SetParameters(const NETGENPlugin_Hypothesis* hyp)
285 netgen::MeshingParameters& mparams = netgen::mparam;
286 // Initialize global NETGEN parameters:
287 // maximal mesh segment size
288 mparams.maxh = hyp->GetMaxSize();
289 // maximal mesh element linear size
290 mparams.minh = hyp->GetMinSize();
291 // minimal number of segments per edge
292 mparams.segmentsperedge = hyp->GetNbSegPerEdge();
293 // rate of growth of size between elements
294 mparams.grading = hyp->GetGrowthRate();
295 // safety factor for curvatures (elements per radius)
296 mparams.curvaturesafety = hyp->GetNbSegPerRadius();
297 // create elements of second order
298 mparams.secondorder = hyp->GetSecondOrder() ? 1 : 0;
299 // quad-dominated surface meshing
300 mparams.quad = hyp->GetQuadAllowed() ? 1 : 0;
301 _optimize = hyp->GetOptimize();
302 _fineness = hyp->GetFineness();
303 mparams.uselocalh = hyp->GetSurfaceCurvature();
304 netgen::merge_solids = hyp->GetFuseEdges();
305 _chordalError = hyp->GetChordalErrorEnabled() ? hyp->GetChordalError() : -1.;
308 mparams.meshsizefilename= hyp->GetMeshSizeFile().empty() ? 0 : hyp->GetMeshSizeFile().c_str();
310 const NETGENPlugin_Hypothesis::TLocalSize& localSizes = hyp->GetLocalSizesAndEntries();
311 if ( !localSizes.empty() )
313 SMESH_Gen_i* smeshGen_i = SMESH_Gen_i::GetSMESHGen();
314 CORBA::Object_var anObject = smeshGen_i->GetNS()->Resolve("/myStudyManager");
315 SALOMEDS::StudyManager_var aStudyMgr = SALOMEDS::StudyManager::_narrow(anObject);
316 SALOMEDS::Study_var myStudy = aStudyMgr->GetStudyByID(hyp->GetStudyId());
317 if ( !myStudy->_is_nil() )
319 NETGENPlugin_Hypothesis::TLocalSize::const_iterator it = localSizes.begin();
320 for ( ; it != localSizes.end() ; it++)
322 std::string entry = (*it).first;
323 double val = (*it).second;
325 GEOM::GEOM_Object_var aGeomObj;
326 SALOMEDS::SObject_var aSObj = myStudy->FindObjectID( entry.c_str() );
327 if ( !aSObj->_is_nil() ) {
328 CORBA::Object_var obj = aSObj->GetObject();
329 aGeomObj = GEOM::GEOM_Object::_narrow(obj);
332 TopoDS_Shape S = smeshGen_i->GeomObjectToShape( aGeomObj.in() );
333 ::SetLocalSize(S, val);
340 //=============================================================================
342 * Pass simple parameters to NETGEN
344 //=============================================================================
346 void NETGENPlugin_Mesher::SetParameters(const NETGENPlugin_SimpleHypothesis_2D* hyp)
350 SetDefaultParameters();
353 //================================================================================
355 * \brief Store a Viscous Layers hypothesis
357 //================================================================================
359 void NETGENPlugin_Mesher::SetParameters(const StdMeshers_ViscousLayers* hyp )
361 _viscousLayersHyp = hyp;
364 //=============================================================================
366 * Link - a pair of integer numbers
368 //=============================================================================
372 Link(int _n1, int _n2) : n1(_n1), n2(_n2) {}
373 Link() : n1(0), n2(0) {}
374 bool Contains( int n ) const { return n == n1 || n == n2; }
375 bool IsConnected( const Link& other ) const
377 return (( Contains( other.n1 ) || Contains( other.n2 )) && ( this != &other ));
381 int HashCode(const Link& aLink, int aLimit)
383 return HashCode(aLink.n1 + aLink.n2, aLimit);
386 Standard_Boolean IsEqual(const Link& aLink1, const Link& aLink2)
388 return (( aLink1.n1 == aLink2.n1 && aLink1.n2 == aLink2.n2 ) ||
389 ( aLink1.n1 == aLink2.n2 && aLink1.n2 == aLink2.n1 ));
394 //================================================================================
396 * \brief return id of netgen point corresponding to SMDS node
398 //================================================================================
399 typedef map< const SMDS_MeshNode*, int > TNode2IdMap;
401 int ngNodeId( const SMDS_MeshNode* node,
402 netgen::Mesh& ngMesh,
403 TNode2IdMap& nodeNgIdMap)
405 int newNgId = ngMesh.GetNP() + 1;
407 TNode2IdMap::iterator node_id = nodeNgIdMap.insert( make_pair( node, newNgId )).first;
409 if ( node_id->second == newNgId)
411 #if defined(DUMP_SEGMENTS) || defined(DUMP_TRIANGLES)
412 cout << "Ng " << newNgId << " - " << node;
414 netgen::MeshPoint p( netgen::Point<3> (node->X(), node->Y(), node->Z()) );
415 ngMesh.AddPoint( p );
417 return node_id->second;
420 //================================================================================
422 * \brief Return computed EDGEs connected to the given one
424 //================================================================================
426 list< TopoDS_Edge > getConnectedEdges( const TopoDS_Edge& edge,
427 const TopoDS_Face& face,
428 const set< SMESH_subMesh* > & computedSM,
429 const SMESH_MesherHelper& helper,
430 map< SMESH_subMesh*, set< int > >& addedEdgeSM2Faces)
433 list< TopoDS_Edge > edges;
434 list< int > nbEdgesInWire;
435 /*int nbWires =*/ SMESH_Block::GetOrderedEdges( face, edges, nbEdgesInWire);
437 // find <edge> within <edges>
438 list< TopoDS_Edge >::iterator eItFwd = edges.begin();
439 for ( ; eItFwd != edges.end(); ++eItFwd )
440 if ( edge.IsSame( *eItFwd ))
442 if ( eItFwd == edges.end()) return list< TopoDS_Edge>();
444 if ( eItFwd->Orientation() >= TopAbs_INTERNAL )
446 // connected INTERNAL edges returned from GetOrderedEdges() are wrongly oriented
447 // so treat each INTERNAL edge separately
448 TopoDS_Edge e = *eItFwd;
450 edges.push_back( e );
454 // get all computed EDGEs connected to <edge>
456 list< TopoDS_Edge >::iterator eItBack = eItFwd, ePrev;
457 TopoDS_Vertex vCommon;
458 TopTools_MapOfShape eAdded; // map used not to add a seam edge twice to <edges>
461 // put edges before <edge> to <edges> back
462 while ( edges.begin() != eItFwd )
463 edges.splice( edges.end(), edges, edges.begin() );
467 while ( ++eItFwd != edges.end() )
469 SMESH_subMesh* sm = helper.GetMesh()->GetSubMesh( *eItFwd );
471 bool connected = TopExp::CommonVertex( *ePrev, *eItFwd, vCommon );
472 bool computed = sm->IsMeshComputed();
473 bool added = addedEdgeSM2Faces[ sm ].count( helper.GetSubShapeID() );
474 bool doubled = !eAdded.Add( *eItFwd );
475 bool orientOK = (( ePrev ->Orientation() < TopAbs_INTERNAL ) ==
476 ( eItFwd->Orientation() < TopAbs_INTERNAL ) );
477 if ( !connected || !computed || !orientOK || added || doubled )
479 // stop advancement; move edges from tail to head
480 while ( edges.back() != *ePrev )
481 edges.splice( edges.begin(), edges, --edges.end() );
487 while ( eItBack != edges.begin() )
491 SMESH_subMesh* sm = helper.GetMesh()->GetSubMesh( *eItBack );
493 bool connected = TopExp::CommonVertex( *ePrev, *eItBack, vCommon );
494 bool computed = sm->IsMeshComputed();
495 bool added = addedEdgeSM2Faces[ sm ].count( helper.GetSubShapeID() );
496 bool doubled = !eAdded.Add( *eItBack );
497 bool orientOK = (( ePrev ->Orientation() < TopAbs_INTERNAL ) ==
498 ( eItBack->Orientation() < TopAbs_INTERNAL ) );
499 if ( !connected || !computed || !orientOK || added || doubled)
502 edges.erase( edges.begin(), ePrev );
506 if ( edges.front() != edges.back() )
508 // assure that the 1st vertex is meshed
509 TopoDS_Edge eLast = edges.back();
510 while ( !SMESH_Algo::VertexNode( SMESH_MesherHelper::IthVertex( 0, edges.front()), helper.GetMeshDS())
512 edges.front() != eLast )
513 edges.splice( edges.end(), edges, edges.begin() );
518 //================================================================================
520 * \brief Make triangulation of a shape precise enough
522 //================================================================================
524 void updateTriangulation( const TopoDS_Shape& shape )
526 // static set< Poly_Triangulation* > updated;
528 // TopLoc_Location loc;
529 // TopExp_Explorer fExp( shape, TopAbs_FACE );
530 // for ( ; fExp.More(); fExp.Next() )
532 // Handle(Poly_Triangulation) triangulation =
533 // BRep_Tool::Triangulation ( TopoDS::Face( fExp.Current() ), loc);
534 // if ( triangulation.IsNull() ||
535 // updated.insert( triangulation.operator->() ).second )
537 // BRepTools::Clean (shape);
540 BRepMesh_IncrementalMesh e(shape, 0.01, true);
542 catch (Standard_Failure)
545 // updated.erase( triangulation.operator->() );
546 // triangulation = BRep_Tool::Triangulation ( TopoDS::Face( fExp.Current() ), loc);
547 // updated.insert( triangulation.operator->() );
551 //================================================================================
553 * \brief Returns a medium node either existing in SMESH of created by NETGEN
554 * \param [in] corner1 - corner node 1
555 * \param [in] corner2 - corner node 2
556 * \param [in] defaultMedium - the node created by NETGEN
557 * \param [in] helper - holder of medium nodes existing in SMESH
558 * \return const SMDS_MeshNode* - the result node
560 //================================================================================
562 const SMDS_MeshNode* mediumNode( const SMDS_MeshNode* corner1,
563 const SMDS_MeshNode* corner2,
564 const SMDS_MeshNode* defaultMedium,
565 const SMESH_MesherHelper* helper)
569 TLinkNodeMap::const_iterator l2n =
570 helper->GetTLinkNodeMap().find( SMESH_TLink( corner1, corner2 ));
571 if ( l2n != helper->GetTLinkNodeMap().end() )
572 defaultMedium = l2n->second;
574 return defaultMedium;
577 //================================================================================
579 * \brief Assure that mesh on given shapes is quadratic
581 //================================================================================
583 // void makeQuadratic( const TopTools_IndexedMapOfShape& shapes,
584 // SMESH_Mesh* mesh )
586 // for ( int i = 1; i <= shapes.Extent(); ++i )
588 // SMESHDS_SubMesh* smDS = mesh->GetMeshDS()->MeshElements( shapes(i) );
589 // if ( !smDS ) continue;
590 // SMDS_ElemIteratorPtr elemIt = smDS->GetElements();
591 // if ( !elemIt->more() ) continue;
592 // const SMDS_MeshElement* e = elemIt->next();
593 // if ( !e || e->IsQuadratic() )
596 // TIDSortedElemSet elems;
597 // elems.insert( e );
598 // while ( elemIt->more() )
599 // elems.insert( elems.end(), elemIt->next() );
601 // SMESH_MeshEditor( mesh ).ConvertToQuadratic( /*3d=*/false, elems, /*biQuad=*/false );
605 //================================================================================
607 * \brief Restrict size of elements on the given edge
609 //================================================================================
611 void setLocalSize(const TopoDS_Edge& edge,
614 const bool overrideMinH = true)
616 if ( size <= std::numeric_limits<double>::min() )
618 Standard_Real u1, u2;
619 Handle(Geom_Curve) curve = BRep_Tool::Curve(edge, u1, u2);
620 if ( curve.IsNull() )
622 TopoDS_Iterator vIt( edge );
623 if ( !vIt.More() ) return;
624 gp_Pnt p = BRep_Tool::Pnt( TopoDS::Vertex( vIt.Value() ));
625 NETGENPlugin_Mesher::RestrictLocalSize( mesh, p.XYZ(), size, overrideMinH );
629 const int nb = (int)( 1.5 * SMESH_Algo::EdgeLength( edge ) / size );
630 Standard_Real delta = (u2-u1)/nb;
631 for(int i=0; i<nb; i++)
633 Standard_Real u = u1 + delta*i;
634 gp_Pnt p = curve->Value(u);
635 NETGENPlugin_Mesher::RestrictLocalSize( mesh, p.XYZ(), size, overrideMinH );
636 netgen::Point3d pi(p.X(), p.Y(), p.Z());
637 double resultSize = mesh.GetH(pi);
638 if ( resultSize - size > 0.1*size )
639 // netgen does restriction iff oldH/newH > 1.2 (localh.cpp:136)
640 NETGENPlugin_Mesher::RestrictLocalSize( mesh, p.XYZ(), resultSize/1.201, overrideMinH );
645 //================================================================================
647 * \brief Return triangle size for a given chordalError and radius of curvature
649 //================================================================================
651 double elemSizeForChordalError( double chordalError, double radius )
653 if ( 2 * radius < chordalError )
655 return Sqrt( 3 ) * Sqrt( chordalError * ( 2 * radius - chordalError ));
660 //================================================================================
662 * \brief Set local size on shapes defined by SetParameters()
664 //================================================================================
666 void NETGENPlugin_Mesher::SetLocalSize( netgen::OCCGeometry& occgeo,
667 netgen::Mesh& ngMesh)
670 std::map<int,double>::const_iterator it;
671 for( it=EdgeId2LocalSize.begin(); it!=EdgeId2LocalSize.end(); it++)
673 int key = (*it).first;
674 double hi = (*it).second;
675 const TopoDS_Shape& shape = ShapesWithLocalSize.FindKey(key);
676 setLocalSize( TopoDS::Edge(shape), hi, ngMesh );
679 for(it=VertexId2LocalSize.begin(); it!=VertexId2LocalSize.end(); it++)
681 int key = (*it).first;
682 double hi = (*it).second;
683 const TopoDS_Shape& shape = ShapesWithLocalSize.FindKey(key);
684 gp_Pnt p = BRep_Tool::Pnt( TopoDS::Vertex(shape) );
685 NETGENPlugin_Mesher::RestrictLocalSize( ngMesh, p.XYZ(), hi );
688 for(it=FaceId2LocalSize.begin(); it!=FaceId2LocalSize.end(); it++)
690 int key = (*it).first;
691 double val = (*it).second;
692 const TopoDS_Shape& shape = ShapesWithLocalSize.FindKey(key);
693 int faceNgID = occgeo.fmap.FindIndex(shape);
696 occgeo.SetFaceMaxH(faceNgID, val);
697 for ( TopExp_Explorer edgeExp( shape, TopAbs_EDGE ); edgeExp.More(); edgeExp.Next() )
698 setLocalSize( TopoDS::Edge( edgeExp.Current() ), val, ngMesh );
700 else if ( !ShapesWithControlPoints.count( key ))
702 SMESHUtils::createPointsSampleFromFace( TopoDS::Face( shape ), val, ControlPoints );
703 ShapesWithControlPoints.insert( key );
707 for(it=SolidId2LocalSize.begin(); it!=SolidId2LocalSize.end(); it++)
709 int key = (*it).first;
710 double val = (*it).second;
711 if ( !ShapesWithControlPoints.count( key ))
713 const TopoDS_Shape& shape = ShapesWithLocalSize.FindKey(key);
714 SMESHUtils::createPointsSampleFromSolid( TopoDS::Solid( shape ), val, ControlPoints );
715 ShapesWithControlPoints.insert( key );
719 if ( !ControlPoints.empty() )
721 for ( size_t i = 0; i < ControlPoints.size(); ++i )
722 NETGENPlugin_Mesher::RestrictLocalSize( ngMesh, ControlPoints[i].XYZ(), ControlPoints[i].Size() );
727 //================================================================================
729 * \brief Restrict local size to achieve a required _chordalError
731 //================================================================================
733 void NETGENPlugin_Mesher::SetLocalSizeForChordalError( netgen::OCCGeometry& occgeo,
734 netgen::Mesh& ngMesh)
736 if ( _chordalError <= 0. )
740 BRepLProp_SLProps surfProp( 2, 1e-6 );
741 const double sizeCoef = 0.95;
743 // find non-planar FACEs with non-constant curvature
744 std::vector<int> fInd;
745 for ( int i = 1; i <= occgeo.fmap.Extent(); ++i )
747 const TopoDS_Face& face = TopoDS::Face( occgeo.fmap( i ));
748 BRepAdaptor_Surface surfAd( face, false );
749 switch ( surfAd.GetType() )
753 case GeomAbs_Cylinder:
755 case GeomAbs_Torus: // constant curvature
757 surfProp.SetSurface( surfAd );
758 surfProp.SetParameters( 0, 0 );
759 double maxCurv = Max( Abs( surfProp.MaxCurvature()), Abs( surfProp.MinCurvature() ));
760 double size = elemSizeForChordalError( _chordalError, 1 / maxCurv );
761 occgeo.SetFaceMaxH( i, size * sizeCoef );
762 // limit size one edges
763 TopTools_MapOfShape edgeMap;
764 for ( TopExp_Explorer eExp( face, TopAbs_EDGE ); eExp.More(); eExp.Next() )
765 if ( edgeMap.Add( eExp.Current() ))
766 setLocalSize( TopoDS::Edge( eExp.Current() ), size, ngMesh, /*overrideMinH=*/false );
770 Handle(Geom_Surface) surf = BRep_Tool::Surface( face, loc );
771 if ( GeomLib_IsPlanarSurface( surf ).IsPlanar() )
780 TopoDS_Compound allFacesComp;
781 b.MakeCompound( allFacesComp );
782 for ( size_t i = 0; i < fInd.size(); ++i )
783 b.Add( allFacesComp, occgeo.fmap( fInd[i] ));
785 // copy the shape to avoid spoiling its triangulation
786 TopoDS_Shape allFacesCompCopy = BRepBuilderAPI_Copy( allFacesComp );
788 // create triangulation with desired chordal error
789 BRepMesh_IncrementalMesh( allFacesCompCopy,
791 /*isRelative = */Standard_False,
792 /*theAngDeflection = */ 0.5,
793 /*isInParallel = */Standard_True);
796 for ( TopExp_Explorer fExp( allFacesCompCopy, TopAbs_FACE ); fExp.More(); fExp.Next() )
798 const TopoDS_Face& face = TopoDS::Face( fExp.Current() );
799 Handle(Poly_Triangulation) triangulation = BRep_Tool::Triangulation ( face, loc );
800 if ( triangulation.IsNull() ) continue;
802 BRepAdaptor_Surface surf( face, false );
803 surfProp.SetSurface( surf );
808 for ( int i = 1; i <= triangulation->NbTriangles(); ++i )
810 Standard_Integer n1,n2,n3;
811 triangulation->Triangles()(i).Get( n1,n2,n3 );
812 p [0] = triangulation->Nodes()(n1).Transformed(loc).XYZ();
813 p [1] = triangulation->Nodes()(n2).Transformed(loc).XYZ();
814 p [2] = triangulation->Nodes()(n3).Transformed(loc).XYZ();
815 uv[0] = triangulation->UVNodes()(n1).XY();
816 uv[1] = triangulation->UVNodes()(n2).XY();
817 uv[2] = triangulation->UVNodes()(n3).XY();
818 surfProp.SetParameters( uv[0].X(), uv[0].Y() );
819 if ( !surfProp.IsCurvatureDefined() )
822 for ( int n = 0; n < 3; ++n ) // get size at triangle nodes
824 surfProp.SetParameters( uv[n].X(), uv[n].Y() );
825 double maxCurv = Max( Abs( surfProp.MaxCurvature()), Abs( surfProp.MinCurvature() ));
826 size[n] = elemSizeForChordalError( _chordalError, 1 / maxCurv );
828 for ( int n1 = 0; n1 < 3; ++n1 ) // limit size along each triangle edge
830 int n2 = ( n1 + 1 ) % 3;
831 double minSize = size[n1], maxSize = size[n2];
832 if ( size[n1] > size[n2] )
833 minSize = size[n2], maxSize = size[n1];
835 if ( maxSize / minSize < 1.2 ) // netgen ignores size difference < 1.2
837 ngMesh.RestrictLocalHLine ( netgen::Point3d( p[n1].X(), p[n1].Y(), p[n1].Z() ),
838 netgen::Point3d( p[n2].X(), p[n2].Y(), p[n2].Z() ),
839 sizeCoef * minSize );
843 gp_XY uvVec( uv[n2] - uv[n1] );
844 double len = ( p[n1] - p[n2] ).Modulus();
845 int nb = int( len / minSize ) + 1;
846 for ( int j = 0; j <= nb; ++j )
848 double r = double( j ) / nb;
849 gp_XY uvj = uv[n1] + r * uvVec;
851 surfProp.SetParameters( uvj.X(), uvj.Y() );
852 double maxCurv = Max( Abs( surfProp.MaxCurvature()), Abs( surfProp.MinCurvature() ));
853 double h = elemSizeForChordalError( _chordalError, 1 / maxCurv );
855 const gp_Pnt& pj = surfProp.Value();
856 netgen::Point3d ngP( pj.X(), pj.Y(), pj.Z());
857 ngMesh.RestrictLocalH( ngP, h * sizeCoef );
866 //================================================================================
868 * \brief Initialize netgen::OCCGeometry with OCCT shape
870 //================================================================================
872 void NETGENPlugin_Mesher::PrepareOCCgeometry(netgen::OCCGeometry& occgeo,
873 const TopoDS_Shape& shape,
875 list< SMESH_subMesh* > * meshedSM,
876 NETGENPlugin_Internals* intern)
878 updateTriangulation( shape );
881 BRepBndLib::Add (shape, bb);
882 double x1,y1,z1,x2,y2,z2;
883 bb.Get (x1,y1,z1,x2,y2,z2);
884 netgen::Point<3> p1 = netgen::Point<3> (x1,y1,z1);
885 netgen::Point<3> p2 = netgen::Point<3> (x2,y2,z2);
886 occgeo.boundingbox = netgen::Box<3> (p1,p2);
888 occgeo.shape = shape;
891 // fill maps of shapes of occgeo with not yet meshed subshapes
893 // get root submeshes
894 list< SMESH_subMesh* > rootSM;
895 const int shapeID = mesh.GetMeshDS()->ShapeToIndex( shape );
896 if ( shapeID > 0 ) { // SMESH_subMesh with ID 0 may exist, don't use it!
897 rootSM.push_back( mesh.GetSubMesh( shape ));
900 for ( TopoDS_Iterator it( shape ); it.More(); it.Next() )
901 rootSM.push_back( mesh.GetSubMesh( it.Value() ));
906 // add subshapes of empty submeshes
907 list< SMESH_subMesh* >::iterator rootIt = rootSM.begin(), rootEnd = rootSM.end();
908 for ( ; rootIt != rootEnd; ++rootIt ) {
909 SMESH_subMesh * root = *rootIt;
910 SMESH_subMeshIteratorPtr smIt = root->getDependsOnIterator(/*includeSelf=*/true,
911 /*complexShapeFirst=*/true);
912 // to find a right orientation of subshapes (PAL20462)
913 TopTools_IndexedMapOfShape subShapes;
914 TopExp::MapShapes(root->GetSubShape(), subShapes);
915 while ( smIt->more() )
917 SMESH_subMesh* sm = smIt->next();
918 TopoDS_Shape shape = sm->GetSubShape();
919 totNbFaces += ( shape.ShapeType() == TopAbs_FACE );
920 if ( intern && intern->isShapeToPrecompute( shape ))
922 if ( !meshedSM || sm->IsEmpty() )
924 if ( shape.ShapeType() != TopAbs_VERTEX )
925 shape = subShapes( subShapes.FindIndex( shape ));// shape -> index -> oriented shape
926 if ( shape.Orientation() >= TopAbs_INTERNAL )
927 shape.Orientation( TopAbs_FORWARD ); // isuue 0020676
928 switch ( shape.ShapeType() ) {
929 case TopAbs_FACE : occgeo.fmap.Add( shape ); break;
930 case TopAbs_EDGE : occgeo.emap.Add( shape ); break;
931 case TopAbs_VERTEX: occgeo.vmap.Add( shape ); break;
932 case TopAbs_SOLID :occgeo.somap.Add( shape ); break;
936 // collect submeshes of meshed shapes
939 const int dim = SMESH_Gen::GetShapeDim( shape );
940 meshedSM[ dim ].push_back( sm );
944 occgeo.facemeshstatus.SetSize (totNbFaces);
945 occgeo.facemeshstatus = 0;
946 occgeo.face_maxh_modified.SetSize(totNbFaces);
947 occgeo.face_maxh_modified = 0;
948 occgeo.face_maxh.SetSize(totNbFaces);
949 occgeo.face_maxh = netgen::mparam.maxh;
952 //================================================================================
954 * \brief Return a default min size value suitable for the given geometry.
956 //================================================================================
958 double NETGENPlugin_Mesher::GetDefaultMinSize(const TopoDS_Shape& geom,
959 const double maxSize)
961 updateTriangulation( geom );
965 const int* pi[4] = { &i1, &i2, &i3, &i1 };
968 TopExp_Explorer fExp( geom, TopAbs_FACE );
969 for ( ; fExp.More(); fExp.Next() )
971 Handle(Poly_Triangulation) triangulation =
972 BRep_Tool::Triangulation ( TopoDS::Face( fExp.Current() ), loc);
973 if ( triangulation.IsNull() ) continue;
974 const double fTol = BRep_Tool::Tolerance( TopoDS::Face( fExp.Current() ));
975 const TColgp_Array1OfPnt& points = triangulation->Nodes();
976 const Poly_Array1OfTriangle& trias = triangulation->Triangles();
977 for ( int iT = trias.Lower(); iT <= trias.Upper(); ++iT )
979 trias(iT).Get( i1, i2, i3 );
980 for ( int j = 0; j < 3; ++j )
982 double dist2 = points(*pi[j]).SquareDistance( points( *pi[j+1] ));
983 if ( dist2 < minh && fTol*fTol < dist2 )
985 bb.Add( points(*pi[j]));
989 if ( minh > 0.25 * bb.SquareExtent() ) // simple geometry, rough triangulation
991 minh = 1e-3 * sqrt( bb.SquareExtent());
992 //cout << "BND BOX minh = " <<minh << endl;
996 minh = sqrt( minh ); // triangulation for visualization is rather fine
997 //cout << "TRIANGULATION minh = " <<minh << endl;
999 if ( minh > 0.5 * maxSize )
1000 minh = maxSize / 3.;
1005 //================================================================================
1007 * \brief Restrict size of elements at a given point
1009 //================================================================================
1011 void NETGENPlugin_Mesher::RestrictLocalSize(netgen::Mesh& ngMesh,
1014 const bool overrideMinH)
1016 if ( size <= std::numeric_limits<double>::min() )
1018 if ( netgen::mparam.minh > size )
1022 ngMesh.SetMinimalH( size );
1023 netgen::mparam.minh = size;
1027 size = netgen::mparam.minh;
1030 netgen::Point3d pi(p.X(), p.Y(), p.Z());
1031 ngMesh.RestrictLocalH( pi, size );
1034 //================================================================================
1036 * \brief fill ngMesh with nodes and elements of computed submeshes
1038 //================================================================================
1040 bool NETGENPlugin_Mesher::FillNgMesh(netgen::OCCGeometry& occgeom,
1041 netgen::Mesh& ngMesh,
1042 vector<const SMDS_MeshNode*>& nodeVec,
1043 const list< SMESH_subMesh* > & meshedSM,
1044 SMESH_MesherHelper* quadHelper,
1045 SMESH_ProxyMesh::Ptr proxyMesh)
1047 TNode2IdMap nodeNgIdMap;
1048 for ( size_t i = 1; i < nodeVec.size(); ++i )
1049 nodeNgIdMap.insert( make_pair( nodeVec[i], i ));
1051 TopTools_MapOfShape visitedShapes;
1052 map< SMESH_subMesh*, set< int > > visitedEdgeSM2Faces;
1053 set< SMESH_subMesh* > computedSM( meshedSM.begin(), meshedSM.end() );
1055 SMESH_MesherHelper helper (*_mesh);
1057 int faceNgID = ngMesh.GetNFD();
1059 list< SMESH_subMesh* >::const_iterator smIt, smEnd = meshedSM.end();
1060 for ( smIt = meshedSM.begin(); smIt != smEnd; ++smIt )
1062 SMESH_subMesh* sm = *smIt;
1063 if ( !visitedShapes.Add( sm->GetSubShape() ))
1066 const SMESHDS_SubMesh * smDS = sm->GetSubMeshDS();
1067 if ( !smDS ) continue;
1069 switch ( sm->GetSubShape().ShapeType() )
1071 case TopAbs_EDGE: { // EDGE
1072 // ----------------------
1073 TopoDS_Edge geomEdge = TopoDS::Edge( sm->GetSubShape() );
1074 if ( geomEdge.Orientation() >= TopAbs_INTERNAL )
1075 geomEdge.Orientation( TopAbs_FORWARD ); // issue 0020676
1077 // Add ng segments for each not meshed FACE the EDGE bounds
1078 PShapeIteratorPtr fIt = helper.GetAncestors( geomEdge, *sm->GetFather(), TopAbs_FACE );
1079 while ( const TopoDS_Shape * anc = fIt->next() )
1081 faceNgID = occgeom.fmap.FindIndex( *anc );
1083 continue; // meshed face
1085 int faceSMDSId = helper.GetMeshDS()->ShapeToIndex( *anc );
1086 if ( visitedEdgeSM2Faces[ sm ].count( faceSMDSId ))
1087 continue; // already treated EDGE
1089 TopoDS_Face face = TopoDS::Face( occgeom.fmap( faceNgID ));
1090 if ( face.Orientation() >= TopAbs_INTERNAL )
1091 face.Orientation( TopAbs_FORWARD ); // issue 0020676
1093 // get all meshed EDGEs of the FACE connected to geomEdge (issue 0021140)
1094 helper.SetSubShape( face );
1095 list< TopoDS_Edge > edges = getConnectedEdges( geomEdge, face, computedSM, helper,
1096 visitedEdgeSM2Faces );
1097 if ( edges.empty() )
1098 continue; // wrong ancestor?
1100 // find out orientation of <edges> within <face>
1101 TopoDS_Edge eNotSeam = edges.front();
1102 if ( helper.HasSeam() )
1104 list< TopoDS_Edge >::iterator eIt = edges.begin();
1105 while ( helper.IsRealSeam( *eIt )) ++eIt;
1106 if ( eIt != edges.end() )
1109 TopAbs_Orientation fOri = helper.GetSubShapeOri( face, eNotSeam );
1110 bool isForwad = ( fOri == eNotSeam.Orientation() || fOri >= TopAbs_INTERNAL );
1112 // get all nodes from connected <edges>
1113 const bool isQuad = smDS->IsQuadratic();
1114 StdMeshers_FaceSide fSide( face, edges, _mesh, isForwad, isQuad, &helper );
1115 const vector<UVPtStruct>& points = fSide.GetUVPtStruct();
1116 if ( points.empty() )
1117 return false; // invalid node params?
1118 int i, nbSeg = fSide.NbSegments();
1120 // remember EDGEs of fSide to treat only once
1121 for ( int iE = 0; iE < fSide.NbEdges(); ++iE )
1122 visitedEdgeSM2Faces[ helper.GetMesh()->GetSubMesh( fSide.Edge(iE )) ].insert(faceSMDSId);
1124 double otherSeamParam = 0;
1125 bool isSeam = false;
1129 int prevNgId = ngNodeId( points[0].node, ngMesh, nodeNgIdMap );
1131 for ( i = 0; i < nbSeg; ++i )
1133 const UVPtStruct& p1 = points[ i ];
1134 const UVPtStruct& p2 = points[ i+1 ];
1136 if ( p1.node->GetPosition()->GetTypeOfPosition() == SMDS_TOP_VERTEX ) //an EDGE begins
1139 if ( helper.IsRealSeam( p1.node->getshapeId() ))
1141 TopoDS_Edge e = fSide.Edge( fSide.EdgeIndex( 0.5 * ( p1.normParam + p2.normParam )));
1142 isSeam = helper.IsRealSeam( e );
1145 otherSeamParam = helper.GetOtherParam( helper.GetPeriodicIndex() & 1 ? p2.u : p2.v );
1149 netgen::Segment seg;
1152 seg[1] = prevNgId = ngNodeId( p2.node, ngMesh, nodeNgIdMap );
1153 // node param on curve
1154 seg.epgeominfo[ 0 ].dist = p1.param;
1155 seg.epgeominfo[ 1 ].dist = p2.param;
1157 seg.epgeominfo[ 0 ].u = p1.u;
1158 seg.epgeominfo[ 0 ].v = p1.v;
1159 seg.epgeominfo[ 1 ].u = p2.u;
1160 seg.epgeominfo[ 1 ].v = p2.v;
1162 //geomEdge = fSide.Edge( fSide.EdgeIndex( 0.5 * ( p1.normParam + p2.normParam )));
1163 //seg.epgeominfo[ 0 ].edgenr = seg.epgeominfo[ 1 ].edgenr = occgeom.emap.FindIndex( geomEdge );
1165 //seg.epgeominfo[ iEnd ].edgenr = edgeID; // = geom.emap.FindIndex(edge);
1166 seg.si = faceNgID; // = geom.fmap.FindIndex (face);
1167 seg.edgenr = ngMesh.GetNSeg() + 1; // segment id
1168 ngMesh.AddSegment (seg);
1170 SMESH_TNodeXYZ np1( p1.node ), np2( p2.node );
1171 RestrictLocalSize( ngMesh, 0.5*(np1+np2), (np1-np2).Modulus() );
1173 #ifdef DUMP_SEGMENTS
1174 cout << "Segment: " << seg.edgenr << " on SMESH face " << helper.GetMeshDS()->ShapeToIndex( face ) << endl
1175 << "\tface index: " << seg.si << endl
1176 << "\tp1: " << seg[0] << endl
1177 << "\tp2: " << seg[1] << endl
1178 << "\tp0 param: " << seg.epgeominfo[ 0 ].dist << endl
1179 << "\tp0 uv: " << seg.epgeominfo[ 0 ].u <<", "<< seg.epgeominfo[ 0 ].v << endl
1180 //<< "\tp0 edge: " << seg.epgeominfo[ 0 ].edgenr << endl
1181 << "\tp1 param: " << seg.epgeominfo[ 1 ].dist << endl
1182 << "\tp1 uv: " << seg.epgeominfo[ 1 ].u <<", "<< seg.epgeominfo[ 1 ].v << endl;
1183 //<< "\tp1 edge: " << seg.epgeominfo[ 1 ].edgenr << endl;
1187 if ( helper.GetPeriodicIndex() && 1 ) {
1188 seg.epgeominfo[ 0 ].u = otherSeamParam;
1189 seg.epgeominfo[ 1 ].u = otherSeamParam;
1190 swap (seg.epgeominfo[0].v, seg.epgeominfo[1].v);
1192 seg.epgeominfo[ 0 ].v = otherSeamParam;
1193 seg.epgeominfo[ 1 ].v = otherSeamParam;
1194 swap (seg.epgeominfo[0].u, seg.epgeominfo[1].u);
1196 swap( seg[0], seg[1] );
1197 swap( seg.epgeominfo[0].dist, seg.epgeominfo[1].dist );
1198 seg.edgenr = ngMesh.GetNSeg() + 1; // segment id
1199 ngMesh.AddSegment( seg );
1200 #ifdef DUMP_SEGMENTS
1201 cout << "Segment: " << seg.edgenr << endl
1202 << "\t is SEAM (reverse) of the previous. "
1203 << " Other " << (helper.GetPeriodicIndex() && 1 ? "U" : "V")
1204 << " = " << otherSeamParam << endl;
1207 else if ( fOri == TopAbs_INTERNAL )
1209 swap( seg[0], seg[1] );
1210 swap( seg.epgeominfo[0], seg.epgeominfo[1] );
1211 seg.edgenr = ngMesh.GetNSeg() + 1; // segment id
1212 ngMesh.AddSegment( seg );
1213 #ifdef DUMP_SEGMENTS
1214 cout << "Segment: " << seg.edgenr << endl << "\t is REVERSE of the previous" << endl;
1218 } // loop on geomEdge ancestors
1220 if ( quadHelper ) // remember medium nodes of sub-meshes
1222 SMDS_ElemIteratorPtr edges = smDS->GetElements();
1223 while ( edges->more() )
1225 const SMDS_MeshElement* e = edges->next();
1226 if ( !quadHelper->AddTLinks( static_cast< const SMDS_MeshEdge*>( e )))
1232 } // case TopAbs_EDGE
1234 case TopAbs_FACE: { // FACE
1235 // ----------------------
1236 const TopoDS_Face& geomFace = TopoDS::Face( sm->GetSubShape() );
1237 helper.SetSubShape( geomFace );
1238 bool isInternalFace = ( geomFace.Orientation() == TopAbs_INTERNAL );
1240 // Find solids the geomFace bounds
1241 int solidID1 = 0, solidID2 = 0;
1243 PShapeIteratorPtr solidIt = helper.GetAncestors( geomFace, *sm->GetFather(), TopAbs_SOLID);
1244 while ( const TopoDS_Shape * solid = solidIt->next() )
1246 int id = occgeom.somap.FindIndex ( *solid );
1247 if ( solidID1 && id != solidID1 ) solidID2 = id;
1251 if ( proxyMesh && proxyMesh->GetProxySubMesh( geomFace ))
1253 // if a proxy sub-mesh contains temporary faces, then these faces
1254 // should be used to mesh only one SOLID
1255 bool hasTmp = false;
1256 smDS = proxyMesh->GetSubMesh( geomFace );
1257 SMDS_ElemIteratorPtr faces = smDS->GetElements();
1258 while ( faces->more() )
1260 const SMDS_MeshElement* f = faces->next();
1261 if ( proxyMesh->IsTemporary( f ))
1264 std::vector<const SMDS_MeshNode*> fNodes( f->begin_nodes(), f->end_nodes() );
1265 std::vector<const SMDS_MeshElement*> vols;
1266 if ( _mesh->GetMeshDS()->GetElementsByNodes( fNodes, vols, SMDSAbs_Volume ) == 1 )
1268 int geomID = vols[0]->getshapeId();
1269 const TopoDS_Shape& solid = helper.GetMeshDS()->IndexToShape( geomID );
1270 if ( !solid.IsNull() )
1271 solidID1 = occgeom.somap.FindIndex ( solid );
1277 // exclude faces generated by NETGEN from computation of 3D mesh
1278 const int fID = occgeom.fmap.FindIndex( geomFace );
1279 if ( !hasTmp ) // shrunk mesh
1281 // move netgen points according to moved nodes
1282 SMESH_subMeshIteratorPtr smIt = sm->getDependsOnIterator(/*includeSelf=*/true);
1283 while ( smIt->more() )
1285 SMESH_subMesh* sub = smIt->next();
1286 if ( !sub->GetSubMeshDS() ) continue;
1287 SMDS_NodeIteratorPtr nodeIt = sub->GetSubMeshDS()->GetNodes();
1288 while ( nodeIt->more() )
1290 const SMDS_MeshNode* n = nodeIt->next();
1291 int ngID = ngNodeId( n, ngMesh, nodeNgIdMap );
1292 netgen::MeshPoint& ngPoint = ngMesh.Point( ngID );
1293 ngPoint(0) = n->X();
1294 ngPoint(1) = n->Y();
1295 ngPoint(2) = n->Z();
1298 // remove faces near boundary to avoid their overlapping
1299 // with shrunk faces
1300 for ( int i = 1; i <= ngMesh.GetNSE(); ++i )
1302 const netgen::Element2d& elem = ngMesh.SurfaceElement(i);
1303 if ( elem.GetIndex() == fID )
1305 for ( int iN = 0; iN < elem.GetNP(); ++iN )
1306 if ( ngMesh[ elem[ iN ]].Type() != netgen::SURFACEPOINT )
1308 ngMesh.DeleteSurfaceElement( i );
1317 ngMesh.AddFaceDescriptor( netgen::FaceDescriptor( faceNgID,/*solid1=*/0,/*solid2=*/0,0 ));
1318 for (int i = 1; i <= ngMesh.GetNSE(); ++i )
1320 const netgen::Element2d& elem = ngMesh.SurfaceElement(i);
1321 if ( elem.GetIndex() == fID )
1322 const_cast< netgen::Element2d& >( elem ).SetIndex( faceNgID );
1326 // Add ng face descriptors of meshed faces
1328 ngMesh.AddFaceDescriptor( netgen::FaceDescriptor( faceNgID, solidID1, solidID2, 0 ));
1330 // if second oreder is required, even already meshed faces must be passed to NETGEN
1331 int fID = occgeom.fmap.Add( geomFace );
1332 if ( occgeom.facemeshstatus.Size() < fID ) occgeom.facemeshstatus.SetSize( fID );
1333 occgeom.facemeshstatus[ fID-1 ] = netgen::FACE_MESHED_OK;
1334 while ( fID < faceNgID ) // geomFace is already in occgeom.fmap, add a copy
1336 fID = occgeom.fmap.Add( BRepBuilderAPI_Copy( geomFace, /*copyGeom=*/false ));
1337 if ( occgeom.facemeshstatus.Size() < fID ) occgeom.facemeshstatus.SetSize( fID );
1338 occgeom.facemeshstatus[ fID-1 ] = netgen::FACE_MESHED_OK;
1340 // Problem with the second order in a quadrangular mesh remains.
1341 // 1) All quadrangles generated by NETGEN are moved to an inexistent face
1342 // by FillSMesh() (find "AddFaceDescriptor")
1343 // 2) Temporary triangles generated by StdMeshers_QuadToTriaAdaptor
1344 // are on faces where quadrangles were.
1345 // Due to these 2 points, wrong geom faces are used while conversion to quadratic
1346 // of the mentioned above quadrangles and triangles
1348 // Orient the face correctly in solidID1 (issue 0020206)
1349 bool reverse = false;
1351 TopoDS_Shape solid = occgeom.somap( solidID1 );
1352 TopAbs_Orientation faceOriInSolid = helper.GetSubShapeOri( solid, geomFace );
1353 if ( faceOriInSolid >= 0 )
1355 helper.IsReversedSubMesh( TopoDS::Face( geomFace.Oriented( faceOriInSolid )));
1358 // Add surface elements
1360 netgen::Element2d tri(3);
1361 tri.SetIndex( faceNgID );
1362 SMESH_TNodeXYZ xyz[3];
1364 #ifdef DUMP_TRIANGLES
1365 cout << "SMESH face " << helper.GetMeshDS()->ShapeToIndex( geomFace )
1366 << " internal="<<isInternalFace << endl;
1369 SMDS_ElemIteratorPtr faces = smDS->GetElements();
1370 while ( faces->more() )
1372 const SMDS_MeshElement* f = faces->next();
1373 if ( f->NbNodes() % 3 != 0 ) // not triangle
1375 PShapeIteratorPtr solidIt=helper.GetAncestors(geomFace,*sm->GetFather(),TopAbs_SOLID);
1376 if ( const TopoDS_Shape * solid = solidIt->next() )
1377 sm = _mesh->GetSubMesh( *solid );
1378 SMESH_BadInputElements* badElems =
1379 new SMESH_BadInputElements( helper.GetMeshDS(), COMPERR_BAD_INPUT_MESH,
1380 "Not triangle sub-mesh");
1382 sm->GetComputeError().reset( badElems );
1386 for ( int i = 0; i < 3; ++i )
1388 const SMDS_MeshNode* node = f->GetNode( i ), * inFaceNode=0;
1391 // get node UV on face
1392 int shapeID = node->getshapeId();
1393 if ( helper.IsSeamShape( shapeID ))
1395 if ( helper.IsSeamShape( f->GetNodeWrap( i+1 )->getshapeId() ))
1396 inFaceNode = f->GetNodeWrap( i-1 );
1398 inFaceNode = f->GetNodeWrap( i+1 );
1400 gp_XY uv = helper.GetNodeUV( geomFace, node, inFaceNode );
1402 int ind = reverse ? 3-i : i+1;
1403 tri.GeomInfoPi(ind).u = uv.X();
1404 tri.GeomInfoPi(ind).v = uv.Y();
1405 tri.PNum (ind) = ngNodeId( node, ngMesh, nodeNgIdMap );
1408 // pass a triangle size to NG size-map
1409 double size = ( ( xyz[0] - xyz[1] ).Modulus() +
1410 ( xyz[1] - xyz[2] ).Modulus() +
1411 ( xyz[2] - xyz[0] ).Modulus() ) / 3;
1412 gp_XYZ gc = ( xyz[0] + xyz[1] + xyz[2] ) / 3;
1413 RestrictLocalSize( ngMesh, gc, size, /*overrideMinH=*/false );
1415 ngMesh.AddSurfaceElement (tri);
1416 #ifdef DUMP_TRIANGLES
1417 cout << tri << endl;
1420 if ( isInternalFace )
1422 swap( tri[1], tri[2] );
1423 ngMesh.AddSurfaceElement (tri);
1424 #ifdef DUMP_TRIANGLES
1425 cout << tri << endl;
1430 if ( quadHelper ) // remember medium nodes of sub-meshes
1432 SMDS_ElemIteratorPtr faces = smDS->GetElements();
1433 while ( faces->more() )
1435 const SMDS_MeshElement* f = faces->next();
1436 if ( !quadHelper->AddTLinks( static_cast< const SMDS_MeshFace*>( f )))
1442 } // case TopAbs_FACE
1444 case TopAbs_VERTEX: { // VERTEX
1445 // --------------------------
1446 // issue 0021405. Add node only if a VERTEX is shared by a not meshed EDGE,
1447 // else netgen removes a free node and nodeVector becomes invalid
1448 PShapeIteratorPtr ansIt = helper.GetAncestors( sm->GetSubShape(),
1452 while ( const TopoDS_Shape* e = ansIt->next() )
1454 SMESH_subMesh* eSub = helper.GetMesh()->GetSubMesh( *e );
1455 if (( toAdd = ( eSub->IsEmpty() && !SMESH_Algo::isDegenerated( TopoDS::Edge( *e )))))
1460 SMDS_NodeIteratorPtr nodeIt = smDS->GetNodes();
1461 if ( nodeIt->more() )
1462 ngNodeId( nodeIt->next(), ngMesh, nodeNgIdMap );
1468 } // loop on submeshes
1471 nodeVec.resize( ngMesh.GetNP() + 1 );
1472 TNode2IdMap::iterator node_NgId, nodeNgIdEnd = nodeNgIdMap.end();
1473 for ( node_NgId = nodeNgIdMap.begin(); node_NgId != nodeNgIdEnd; ++node_NgId)
1474 nodeVec[ node_NgId->second ] = node_NgId->first;
1479 //================================================================================
1481 * \brief Duplicate mesh faces on internal geom faces
1483 //================================================================================
1485 void NETGENPlugin_Mesher::FixIntFaces(const netgen::OCCGeometry& occgeom,
1486 netgen::Mesh& ngMesh,
1487 NETGENPlugin_Internals& internalShapes)
1489 SMESHDS_Mesh* meshDS = internalShapes.getMesh().GetMeshDS();
1491 // find ng indices of internal faces
1493 for ( int ngFaceID = 1; ngFaceID <= occgeom.fmap.Extent(); ++ngFaceID )
1495 int smeshID = meshDS->ShapeToIndex( occgeom.fmap( ngFaceID ));
1496 if ( internalShapes.isInternalShape( smeshID ))
1497 ngFaceIds.insert( ngFaceID );
1499 if ( !ngFaceIds.empty() )
1502 int i, nbFaces = ngMesh.GetNSE();
1503 for ( i = 1; i <= nbFaces; ++i)
1505 netgen::Element2d elem = ngMesh.SurfaceElement(i);
1506 if ( ngFaceIds.count( elem.GetIndex() ))
1508 swap( elem[1], elem[2] );
1509 ngMesh.AddSurfaceElement (elem);
1515 //================================================================================
1517 * \brief Tries to heal the mesh on a FACE. The FACE is supposed to be partially
1518 * meshed due to NETGEN failure
1519 * \param [in] occgeom - geometry
1520 * \param [in,out] ngMesh - the mesh to fix
1521 * \param [inout] faceID - ID of the FACE to fix the mesh on
1522 * \return bool - is mesh is or becomes OK
1524 //================================================================================
1526 bool NETGENPlugin_Mesher::FixFaceMesh(const netgen::OCCGeometry& occgeom,
1527 netgen::Mesh& ngMesh,
1530 // we address a case where the FACE is almost fully meshed except small holes
1531 // of usually triangular shape at FACE boundary (IPAL52861)
1533 // The case appeared to be not simple: holes only look triangular but
1534 // indeed are a self intersecting polygon. A reason of the bug was in coincident
1535 // NG points on a seam edge. But the code below is very nice, leave it for
1540 if ( occgeom.fmap.Extent() < faceID )
1542 //const TopoDS_Face& face = TopoDS::Face( occgeom.fmap( faceID ));
1544 // find free links on the FACE
1545 NCollection_Map<Link> linkMap;
1546 for ( int iF = 1; iF <= ngMesh.GetNSE(); ++iF )
1548 const netgen::Element2d& elem = ngMesh.SurfaceElement(iF);
1549 if ( faceID != elem.GetIndex() )
1551 int n0 = elem[ elem.GetNP() - 1 ];
1552 for ( int i = 0; i < elem.GetNP(); ++i )
1555 Link link( n0, n1 );
1556 if ( !linkMap.Add( link ))
1557 linkMap.Remove( link );
1561 // add/remove boundary links
1562 for ( int iSeg = 1; iSeg <= ngMesh.GetNSeg(); ++iSeg )
1564 const netgen::Segment& seg = ngMesh.LineSegment( iSeg );
1565 if ( seg.si != faceID ) // !edgeIDs.Contains( seg.edgenr ))
1567 Link link( seg[1], seg[0] ); // reverse!!!
1568 if ( !linkMap.Add( link ))
1569 linkMap.Remove( link );
1571 if ( linkMap.IsEmpty() )
1573 if ( linkMap.Extent() < 3 )
1576 // make triangles of the links
1578 netgen::Element2d tri(3);
1579 tri.SetIndex ( faceID );
1581 NCollection_Map<Link>::Iterator linkIt( linkMap );
1582 Link link1 = linkIt.Value();
1583 // look for a link connected to link1
1584 NCollection_Map<Link>::Iterator linkIt2 = linkIt;
1585 for ( linkIt2.Next(); linkIt2.More(); linkIt2.Next() )
1587 const Link& link2 = linkIt2.Value();
1588 if ( link2.IsConnected( link1 ))
1590 // look for a link connected to both link1 and link2
1591 NCollection_Map<Link>::Iterator linkIt3 = linkIt2;
1592 for ( linkIt3.Next(); linkIt3.More(); linkIt3.Next() )
1594 const Link& link3 = linkIt3.Value();
1595 if ( link3.IsConnected( link1 ) &&
1596 link3.IsConnected( link2 ) )
1601 tri[2] = ( link2.Contains( link1.n1 ) ? link2.n1 : link3.n1 );
1602 if ( tri[0] == tri[2] || tri[1] == tri[2] )
1604 ngMesh.AddSurfaceElement( tri );
1606 // prepare for the next tria search
1607 if ( linkMap.Extent() == 3 )
1609 linkMap.Remove( link3 );
1610 linkMap.Remove( link2 );
1612 linkMap.Remove( link1 );
1613 link1 = linkIt.Value();
1626 //================================================================================
1627 // define gp_XY_Subtracted pointer to function calling gp_XY::Subtracted(gp_XY)
1628 gp_XY_FunPtr(Subtracted);
1629 //gp_XY_FunPtr(Added);
1631 //================================================================================
1633 * \brief Evaluate distance between two 2d points along the surface
1635 //================================================================================
1637 double evalDist( const gp_XY& uv1,
1639 const Handle(Geom_Surface)& surf,
1640 const int stopHandler=-1)
1642 if ( stopHandler > 0 ) // continue recursion
1644 gp_XY mid = SMESH_MesherHelper::GetMiddleUV( surf, uv1, uv2 );
1645 return evalDist( uv1,mid, surf, stopHandler-1 ) + evalDist( mid,uv2, surf, stopHandler-1 );
1647 double dist3D = surf->Value( uv1.X(), uv1.Y() ).Distance( surf->Value( uv2.X(), uv2.Y() ));
1648 if ( stopHandler == 0 ) // stop recursion
1651 // start recursion if necessary
1652 double dist2D = SMESH_MesherHelper::ApplyIn2D(surf, uv1, uv2, gp_XY_Subtracted, 0).Modulus();
1653 if ( fabs( dist3D - dist2D ) < dist2D * 1e-10 )
1654 return dist3D; // equal parametrization of a planar surface
1656 return evalDist( uv1, uv2, surf, 3 ); // start recursion
1659 //================================================================================
1661 * \brief Data of vertex internal in geom face
1663 //================================================================================
1667 gp_XY uv; //!< UV in face parametric space
1668 int ngId; //!< ng id of corrsponding node
1669 gp_XY uvClose; //!< UV of closest boundary node
1670 int ngIdClose; //!< ng id of closest boundary node
1673 //================================================================================
1675 * \brief Data of vertex internal in solid
1677 //================================================================================
1681 int ngId; //!< ng id of corresponding node
1682 int ngIdClose; //!< ng id of closest 2d mesh element
1683 int ngIdCloseN; //!< ng id of closest node of the closest 2d mesh element
1686 inline double dist2( const netgen::MeshPoint& p1, const netgen::MeshPoint& p2 )
1688 return gp_Pnt( NGPOINT_COORDS(p1)).SquareDistance( gp_Pnt( NGPOINT_COORDS(p2)));
1691 // inline double dist2(const netgen::MeshPoint& p, const SMDS_MeshNode* n )
1693 // return gp_Pnt( NGPOINT_COORDS(p)).SquareDistance( SMESH_NodeXYZ(n));
1697 //================================================================================
1699 * \brief Make netgen take internal vertices in faces into account by adding
1700 * segments including internal vertices
1702 * This function works in supposition that 1D mesh is already computed in ngMesh
1704 //================================================================================
1706 void NETGENPlugin_Mesher::AddIntVerticesInFaces(const netgen::OCCGeometry& occgeom,
1707 netgen::Mesh& ngMesh,
1708 vector<const SMDS_MeshNode*>& nodeVec,
1709 NETGENPlugin_Internals& internalShapes)
1711 if ((int) nodeVec.size() < ngMesh.GetNP() )
1712 nodeVec.resize( ngMesh.GetNP(), 0 );
1714 SMESHDS_Mesh* meshDS = internalShapes.getMesh().GetMeshDS();
1715 SMESH_MesherHelper helper( internalShapes.getMesh() );
1717 const map<int,list<int> >& face2Vert = internalShapes.getFacesWithVertices();
1718 map<int,list<int> >::const_iterator f2v = face2Vert.begin();
1719 for ( ; f2v != face2Vert.end(); ++f2v )
1721 const TopoDS_Face& face = TopoDS::Face( meshDS->IndexToShape( f2v->first ));
1722 if ( face.IsNull() ) continue;
1723 int faceNgID = occgeom.fmap.FindIndex (face);
1724 if ( faceNgID < 0 ) continue;
1726 TopLoc_Location loc;
1727 Handle(Geom_Surface) surf = BRep_Tool::Surface(face,loc);
1729 helper.SetSubShape( face );
1730 helper.SetElementsOnShape( true );
1732 // Get data of internal vertices and add them to ngMesh
1734 multimap< double, TIntVData > dist2VData; // sort vertices by distance from boundary nodes
1736 int i, nbSegInit = ngMesh.GetNSeg();
1738 // boundary characteristics
1739 double totSegLen2D = 0;
1742 const list<int>& iVertices = f2v->second;
1743 list<int>::const_iterator iv = iVertices.begin();
1744 for ( int nbV = 0; iv != iVertices.end(); ++iv, nbV++ )
1747 // get node on vertex
1748 const TopoDS_Vertex V = TopoDS::Vertex( meshDS->IndexToShape( *iv ));
1749 const SMDS_MeshNode * nV = SMESH_Algo::VertexNode( V, meshDS );
1752 SMESH_subMesh* sm = helper.GetMesh()->GetSubMesh( V );
1753 sm->ComputeStateEngine( SMESH_subMesh::COMPUTE );
1754 nV = SMESH_Algo::VertexNode( V, meshDS );
1755 if ( !nV ) continue;
1758 netgen::MeshPoint mp( netgen::Point<3> (nV->X(), nV->Y(), nV->Z()) );
1759 ngMesh.AddPoint ( mp, 1, netgen::EDGEPOINT );
1760 vData.ngId = ngMesh.GetNP();
1761 nodeVec.push_back( nV );
1765 vData.uv = helper.GetNodeUV( face, nV, 0, &uvOK );
1766 if ( !uvOK ) helper.CheckNodeUV( face, nV, vData.uv, BRep_Tool::Tolerance(V),/*force=*/1);
1768 // loop on all segments of the face to find the node closest to vertex and to count
1769 // average segment 2d length
1770 double closeDist2 = numeric_limits<double>::max(), dist2;
1772 for (i = 1; i <= ngMesh.GetNSeg(); ++i)
1774 netgen::Segment & seg = ngMesh.LineSegment(i);
1775 if ( seg.si != faceNgID ) continue;
1777 for ( int iEnd = 0; iEnd < 2; ++iEnd)
1779 uv[iEnd].SetCoord( seg.epgeominfo[iEnd].u, seg.epgeominfo[iEnd].v );
1780 if ( ngIdLast == seg[ iEnd ] ) continue;
1781 dist2 = helper.ApplyIn2D(surf, uv[iEnd], vData.uv, gp_XY_Subtracted,0).SquareModulus();
1782 if ( dist2 < closeDist2 )
1783 vData.ngIdClose = seg[ iEnd ], vData.uvClose = uv[iEnd], closeDist2 = dist2;
1784 ngIdLast = seg[ iEnd ];
1788 totSegLen2D += helper.ApplyIn2D(surf, uv[0], uv[1], gp_XY_Subtracted, false).Modulus();
1792 dist2VData.insert( make_pair( closeDist2, vData ));
1795 if ( totNbSeg == 0 ) break;
1796 double avgSegLen2d = totSegLen2D / totNbSeg;
1798 // Loop on vertices to add segments
1800 multimap< double, TIntVData >::iterator dist_vData = dist2VData.begin();
1801 for ( ; dist_vData != dist2VData.end(); ++dist_vData )
1803 double closeDist2 = dist_vData->first, dist2;
1804 TIntVData & vData = dist_vData->second;
1806 // try to find more close node among segments added for internal vertices
1807 for (i = nbSegInit+1; i <= ngMesh.GetNSeg(); ++i)
1809 netgen::Segment & seg = ngMesh.LineSegment(i);
1810 if ( seg.si != faceNgID ) continue;
1812 for ( int iEnd = 0; iEnd < 2; ++iEnd)
1814 uv[iEnd].SetCoord( seg.epgeominfo[iEnd].u, seg.epgeominfo[iEnd].v );
1815 dist2 = helper.ApplyIn2D(surf, uv[iEnd], vData.uv, gp_XY_Subtracted,0).SquareModulus();
1816 if ( dist2 < closeDist2 )
1817 vData.ngIdClose = seg[ iEnd ], vData.uvClose = uv[iEnd], closeDist2 = dist2;
1820 // decide whether to use the closest node as the second end of segment or to
1821 // create a new point
1822 int segEnd1 = vData.ngId;
1823 int segEnd2 = vData.ngIdClose; // to use closest node
1824 gp_XY uvV = vData.uv, uvP = vData.uvClose;
1825 double segLenHint = ngMesh.GetH( ngMesh.Point( vData.ngId ));
1826 double nodeDist2D = sqrt( closeDist2 );
1827 double nodeDist3D = evalDist( vData.uv, vData.uvClose, surf );
1828 bool avgLenOK = ( avgSegLen2d < 0.75 * nodeDist2D );
1829 bool hintLenOK = ( segLenHint < 0.75 * nodeDist3D );
1830 //cout << "uvV " << uvV.X() <<","<<uvV.Y() << " ";
1831 if ( hintLenOK || avgLenOK )
1833 // create a point between the closest node and V
1836 double r = min( 0.5, ( hintLenOK ? segLenHint/nodeDist3D : avgSegLen2d/nodeDist2D ));
1837 // direction from V to closet node in 2D
1838 gp_Dir2d v2n( helper.ApplyIn2D(surf, uvP, uvV, gp_XY_Subtracted, false ));
1840 uvP = vData.uv + r * nodeDist2D * v2n.XY();
1841 gp_Pnt P = surf->Value( uvP.X(), uvP.Y() ).Transformed( loc );
1843 netgen::MeshPoint mp( netgen::Point<3> (P.X(), P.Y(), P.Z()));
1844 ngMesh.AddPoint ( mp, 1, netgen::EDGEPOINT );
1845 segEnd2 = ngMesh.GetNP();
1846 //cout << "Middle " << r << " uv " << uvP.X() << "," << uvP.Y() << "( " << ngMesh.Point(segEnd2).X()<<","<<ngMesh.Point(segEnd2).Y()<<","<<ngMesh.Point(segEnd2).Z()<<" )"<< endl;
1847 SMDS_MeshNode * nP = helper.AddNode(P.X(), P.Y(), P.Z());
1848 nodeVec.push_back( nP );
1850 //else cout << "at Node " << " uv " << uvP.X() << "," << uvP.Y() << endl;
1853 netgen::Segment seg;
1855 if ( segEnd1 > segEnd2 ) swap( segEnd1, segEnd2 ), swap( uvV, uvP );
1856 seg[0] = segEnd1; // ng node id
1857 seg[1] = segEnd2; // ng node id
1858 seg.edgenr = ngMesh.GetNSeg() + 1;// segment id
1861 seg.epgeominfo[ 0 ].dist = 0; // param on curve
1862 seg.epgeominfo[ 0 ].u = uvV.X();
1863 seg.epgeominfo[ 0 ].v = uvV.Y();
1864 seg.epgeominfo[ 1 ].dist = 1; // param on curve
1865 seg.epgeominfo[ 1 ].u = uvP.X();
1866 seg.epgeominfo[ 1 ].v = uvP.Y();
1868 // seg.epgeominfo[ 0 ].edgenr = 10; // = geom.emap.FindIndex(edge);
1869 // seg.epgeominfo[ 1 ].edgenr = 10; // = geom.emap.FindIndex(edge);
1871 ngMesh.AddSegment (seg);
1873 // add reverse segment
1874 swap( seg[0], seg[1] );
1875 swap( seg.epgeominfo[0], seg.epgeominfo[1] );
1876 seg.edgenr = ngMesh.GetNSeg() + 1; // segment id
1877 ngMesh.AddSegment (seg);
1883 //================================================================================
1885 * \brief Make netgen take internal vertices in solids into account by adding
1886 * faces including internal vertices
1888 * This function works in supposition that 2D mesh is already computed in ngMesh
1890 //================================================================================
1892 void NETGENPlugin_Mesher::AddIntVerticesInSolids(const netgen::OCCGeometry& occgeom,
1893 netgen::Mesh& ngMesh,
1894 vector<const SMDS_MeshNode*>& nodeVec,
1895 NETGENPlugin_Internals& internalShapes)
1897 #ifdef DUMP_TRIANGLES_SCRIPT
1898 // create a python script making a mesh containing triangles added for internal vertices
1899 ofstream py(DUMP_TRIANGLES_SCRIPT);
1900 py << "import SMESH"<< endl
1901 << "from salome.smesh import smeshBuilder"<<endl
1902 << "smesh = smeshBuilder.New(salome.myStudy)"<<endl
1903 << "m = smesh.Mesh(name='triangles')" << endl;
1905 if ((int) nodeVec.size() < ngMesh.GetNP() )
1906 nodeVec.resize( ngMesh.GetNP(), 0 );
1908 SMESHDS_Mesh* meshDS = internalShapes.getMesh().GetMeshDS();
1909 SMESH_MesherHelper helper( internalShapes.getMesh() );
1911 const map<int,list<int> >& so2Vert = internalShapes.getSolidsWithVertices();
1912 map<int,list<int> >::const_iterator s2v = so2Vert.begin();
1913 for ( ; s2v != so2Vert.end(); ++s2v )
1915 const TopoDS_Shape& solid = meshDS->IndexToShape( s2v->first );
1916 if ( solid.IsNull() ) continue;
1917 int solidNgID = occgeom.somap.FindIndex (solid);
1918 if ( solidNgID < 0 && !occgeom.somap.IsEmpty() ) continue;
1920 helper.SetSubShape( solid );
1921 helper.SetElementsOnShape( true );
1923 // find ng indices of faces within the solid
1925 for (TopExp_Explorer fExp(solid, TopAbs_FACE); fExp.More(); fExp.Next() )
1926 ngFaceIds.insert( occgeom.fmap.FindIndex( fExp.Current() ));
1927 if ( ngFaceIds.size() == 1 && *ngFaceIds.begin() == 0 )
1928 ngFaceIds.insert( 1 );
1930 // Get data of internal vertices and add them to ngMesh
1932 multimap< double, TIntVSoData > dist2VData; // sort vertices by distance from ng faces
1934 int i, nbFaceInit = ngMesh.GetNSE();
1936 // boundary characteristics
1937 double totSegLen = 0;
1940 const list<int>& iVertices = s2v->second;
1941 list<int>::const_iterator iv = iVertices.begin();
1942 for ( int nbV = 0; iv != iVertices.end(); ++iv, nbV++ )
1945 const TopoDS_Vertex V = TopoDS::Vertex( meshDS->IndexToShape( *iv ));
1947 // get node on vertex
1948 const SMDS_MeshNode * nV = SMESH_Algo::VertexNode( V, meshDS );
1951 SMESH_subMesh* sm = helper.GetMesh()->GetSubMesh( V );
1952 sm->ComputeStateEngine( SMESH_subMesh::COMPUTE );
1953 nV = SMESH_Algo::VertexNode( V, meshDS );
1954 if ( !nV ) continue;
1957 netgen::MeshPoint mpV( netgen::Point<3> (nV->X(), nV->Y(), nV->Z()) );
1958 ngMesh.AddPoint ( mpV, 1, netgen::FIXEDPOINT );
1959 vData.ngId = ngMesh.GetNP();
1960 nodeVec.push_back( nV );
1962 // loop on all 2d elements to find the one closest to vertex and to count
1963 // average segment length
1964 double closeDist2 = numeric_limits<double>::max(), avgDist2;
1965 for (i = 1; i <= ngMesh.GetNSE(); ++i)
1967 const netgen::Element2d& elem = ngMesh.SurfaceElement(i);
1968 if ( !ngFaceIds.count( elem.GetIndex() )) continue;
1970 multimap< double, int> dist2nID; // sort nodes of element by distance from V
1971 for ( int j = 0; j < elem.GetNP(); ++j)
1973 netgen::MeshPoint mp = ngMesh.Point( elem[j] );
1974 double d2 = dist2( mpV, mp );
1975 dist2nID.insert( make_pair( d2, elem[j] ));
1976 avgDist2 += d2 / elem.GetNP();
1978 totNbSeg++, totSegLen+= sqrt( dist2( mp, ngMesh.Point( elem[(j+1)%elem.GetNP()])));
1980 double dist = dist2nID.begin()->first; //avgDist2;
1981 if ( dist < closeDist2 )
1982 vData.ngIdClose= i, vData.ngIdCloseN= dist2nID.begin()->second, closeDist2= dist;
1984 dist2VData.insert( make_pair( closeDist2, vData ));
1987 if ( totNbSeg == 0 ) break;
1988 double avgSegLen = totSegLen / totNbSeg;
1990 // Loop on vertices to add triangles
1992 multimap< double, TIntVSoData >::iterator dist_vData = dist2VData.begin();
1993 for ( ; dist_vData != dist2VData.end(); ++dist_vData )
1995 double closeDist2 = dist_vData->first;
1996 TIntVSoData & vData = dist_vData->second;
1998 const netgen::MeshPoint& mpV = ngMesh.Point( vData.ngId );
2000 // try to find more close face among ones added for internal vertices
2001 for (i = nbFaceInit+1; i <= ngMesh.GetNSE(); ++i)
2003 double avgDist2 = 0;
2004 multimap< double, int> dist2nID;
2005 const netgen::Element2d& elem = ngMesh.SurfaceElement(i);
2006 for ( int j = 0; j < elem.GetNP(); ++j)
2008 double d = dist2( mpV, ngMesh.Point( elem[j] ));
2009 dist2nID.insert( make_pair( d, elem[j] ));
2010 avgDist2 += d / elem.GetNP();
2011 if ( avgDist2 < closeDist2 )
2012 vData.ngIdClose= i, vData.ngIdCloseN= dist2nID.begin()->second, closeDist2= avgDist2;
2015 // sort nodes of the closest face by angle with vector from V to the closest node
2016 const double tol = numeric_limits<double>::min();
2017 map< double, int > angle2ID;
2018 const netgen::Element2d& closeFace = ngMesh.SurfaceElement( vData.ngIdClose );
2019 netgen::MeshPoint mp[2];
2020 mp[0] = ngMesh.Point( vData.ngIdCloseN );
2021 gp_XYZ p1( NGPOINT_COORDS( mp[0] ));
2022 gp_XYZ pV( NGPOINT_COORDS( mpV ));
2023 gp_Vec v2p1( pV, p1 );
2024 double distN1 = v2p1.Magnitude();
2025 if ( distN1 <= tol ) continue;
2027 for ( int j = 0; j < closeFace.GetNP(); ++j)
2029 mp[1] = ngMesh.Point( closeFace[j] );
2030 gp_Vec v2p( pV, gp_Pnt( NGPOINT_COORDS( mp[1] )) );
2031 angle2ID.insert( make_pair( v2p1.Angle( v2p ), closeFace[j]));
2033 // get node with angle of 60 degrees or greater
2034 map< double, int >::iterator angle_id = angle2ID.lower_bound( 60. * M_PI / 180. );
2035 if ( angle_id == angle2ID.end() ) angle_id = --angle2ID.end();
2036 const double minAngle = 30. * M_PI / 180.;
2037 const double angle = angle_id->first;
2038 bool angleOK = ( angle > minAngle );
2040 // find points to create a triangle
2041 netgen::Element2d tri(3);
2043 tri[0] = vData.ngId;
2044 tri[1] = vData.ngIdCloseN; // to use the closest nodes
2045 tri[2] = angle_id->second; // to use the node with best angle
2047 // decide whether to use the closest node and the node with best angle or to create new ones
2048 for ( int isBestAngleN = 0; isBestAngleN < 2; ++isBestAngleN )
2050 bool createNew = !angleOK; //, distOK = true;
2052 int triInd = isBestAngleN ? 2 : 1;
2053 mp[isBestAngleN] = ngMesh.Point( tri[triInd] );
2058 double distN2 = sqrt( dist2( mpV, mp[isBestAngleN]));
2059 createNew = ( fabs( distN2 - distN1 ) > 0.25 * distN1 );
2061 else if ( angle < tol )
2063 v2p1.SetX( v2p1.X() + 1e-3 );
2069 double segLenHint = ngMesh.GetH( ngMesh.Point( vData.ngId ));
2070 bool avgLenOK = ( avgSegLen < 0.75 * distN1 );
2071 bool hintLenOK = ( segLenHint < 0.75 * distN1 );
2072 createNew = (createNew || avgLenOK || hintLenOK );
2073 // we create a new node not closer than 0.5 to the closest face
2074 // in order not to clash with other close face
2075 double r = min( 0.5, ( hintLenOK ? segLenHint : avgSegLen ) / distN1 );
2076 distFromV = r * distN1;
2080 // create a new point, between the node and the vertex if angleOK
2081 gp_XYZ p( NGPOINT_COORDS( mp[isBestAngleN] ));
2082 gp_Vec v2p( pV, p ); v2p.Normalize();
2083 if ( isBestAngleN && !angleOK )
2084 p = p1 + gp_Dir( v2p.XYZ() - v2p1.XYZ()).XYZ() * distN1 * 0.95;
2086 p = pV + v2p.XYZ() * distFromV;
2088 if ( !isBestAngleN ) p1 = p, distN1 = distFromV;
2090 mp[isBestAngleN].SetPoint( netgen::Point<3> (p.X(), p.Y(), p.Z()));
2091 ngMesh.AddPoint ( mp[isBestAngleN], 1, netgen::SURFACEPOINT );
2092 tri[triInd] = ngMesh.GetNP();
2093 nodeVec.push_back( helper.AddNode( p.X(), p.Y(), p.Z()) );
2096 ngMesh.AddSurfaceElement (tri);
2097 swap( tri[1], tri[2] );
2098 ngMesh.AddSurfaceElement (tri);
2100 #ifdef DUMP_TRIANGLES_SCRIPT
2101 py << "n1 = m.AddNode( "<< mpV(0)<<", "<< mpV(1)<<", "<< mpV(2)<<") "<< endl
2102 << "n2 = m.AddNode( "<< mp[0](0)<<", "<< mp[0](1)<<", "<< mp[0](2)<<") "<< endl
2103 << "n3 = m.AddNode( "<< mp[1](0)<<", "<< mp[1](1)<<", "<< mp[1](2)<<" )" << endl
2104 << "m.AddFace([n1,n2,n3])" << endl;
2106 } // loop on internal vertices of a solid
2108 } // loop on solids with internal vertices
2111 //================================================================================
2113 * \brief Fill netgen mesh with segments of a FACE
2114 * \param ngMesh - netgen mesh
2115 * \param geom - container of OCCT geometry to mesh
2116 * \param wires - data of nodes on FACE boundary
2117 * \param helper - mesher helper holding the FACE
2118 * \param nodeVec - vector of nodes in which node index == netgen ID
2119 * \retval SMESH_ComputeErrorPtr - error description
2121 //================================================================================
2123 SMESH_ComputeErrorPtr
2124 NETGENPlugin_Mesher::AddSegmentsToMesh(netgen::Mesh& ngMesh,
2125 netgen::OCCGeometry& geom,
2126 const TSideVector& wires,
2127 SMESH_MesherHelper& helper,
2128 vector< const SMDS_MeshNode* > & nodeVec,
2129 const bool overrideMinH)
2131 // ----------------------------
2132 // Check wires and count nodes
2133 // ----------------------------
2135 for ( size_t iW = 0; iW < wires.size(); ++iW )
2137 StdMeshers_FaceSidePtr wire = wires[ iW ];
2138 if ( wire->MissVertexNode() )
2140 // Commented for issue 0020960. It worked for the case, let's wait for case where it doesn't.
2141 // It seems that there is no reason for this limitation
2143 // (new SMESH_ComputeError(COMPERR_BAD_INPUT_MESH, "Missing nodes on vertices"));
2145 const vector<UVPtStruct>& uvPtVec = wire->GetUVPtStruct();
2146 if ((int) uvPtVec.size() != wire->NbPoints() )
2147 return SMESH_ComputeError::New(COMPERR_BAD_INPUT_MESH,
2148 SMESH_Comment("Unexpected nb of points on wire ") << iW
2149 << ": " << uvPtVec.size()<<" != "<<wire->NbPoints());
2150 nbNodes += wire->NbPoints();
2152 nodeVec.reserve( nodeVec.size() + nbNodes + 1 );
2153 if ( nodeVec.empty() )
2154 nodeVec.push_back( 0 );
2156 // -----------------
2158 // -----------------
2160 const bool wasNgMeshEmpty = ( ngMesh.GetNP() < 1 ); /* true => this method is called by
2161 NETGENPlugin_NETGEN_2D_ONLY */
2163 // map for nodes on vertices since they can be shared between wires
2164 // ( issue 0020676, face_int_box.brep) and nodes built by NETGEN
2165 map<const SMDS_MeshNode*, int > node2ngID;
2166 if ( !wasNgMeshEmpty ) // fill node2ngID with nodes built by NETGEN
2168 set< int > subIDs; // ids of sub-shapes of the FACE
2169 for ( size_t iW = 0; iW < wires.size(); ++iW )
2171 StdMeshers_FaceSidePtr wire = wires[ iW ];
2172 for ( int iE = 0, nbE = wire->NbEdges(); iE < nbE; ++iE )
2174 subIDs.insert( wire->EdgeID( iE ));
2175 subIDs.insert( helper.GetMeshDS()->ShapeToIndex( wire->FirstVertex( iE )));
2178 for ( size_t ngID = 1; ngID < nodeVec.size(); ++ngID )
2179 if ( subIDs.count( nodeVec[ngID]->getshapeId() ))
2180 node2ngID.insert( make_pair( nodeVec[ngID], ngID ));
2183 const int solidID = 0, faceID = geom.fmap.FindIndex( helper.GetSubShape() );
2184 if ( ngMesh.GetNFD() < 1 )
2185 ngMesh.AddFaceDescriptor( netgen::FaceDescriptor( faceID, solidID, solidID, 0 ));
2187 for ( size_t iW = 0; iW < wires.size(); ++iW )
2189 StdMeshers_FaceSidePtr wire = wires[ iW ];
2190 const vector<UVPtStruct>& uvPtVec = wire->GetUVPtStruct();
2191 const int nbSegments = wire->NbPoints() - 1;
2193 // assure the 1st node to be in node2ngID, which is needed to correctly
2194 // "close chain of segments" (see below) in case if the 1st node is not
2195 // onVertex because it is on a Viscous layer
2196 node2ngID.insert( make_pair( uvPtVec[ 0 ].node, ngMesh.GetNP() + 1 ));
2198 // compute length of every segment
2199 vector<double> segLen( nbSegments );
2200 for ( int i = 0; i < nbSegments; ++i )
2201 segLen[i] = SMESH_TNodeXYZ( uvPtVec[ i ].node ).Distance( uvPtVec[ i+1 ].node );
2203 int edgeID = 1, posID = -2;
2204 bool isInternalWire = false;
2205 double vertexNormPar = 0;
2206 const int prevNbNGSeg = ngMesh.GetNSeg();
2207 for ( int i = 0; i < nbSegments; ++i ) // loop on segments
2209 // Add the first point of a segment
2211 const SMDS_MeshNode * n = uvPtVec[ i ].node;
2212 const int posShapeID = n->getshapeId();
2213 bool onVertex = ( n->GetPosition()->GetTypeOfPosition() == SMDS_TOP_VERTEX );
2214 bool onEdge = ( n->GetPosition()->GetTypeOfPosition() == SMDS_TOP_EDGE );
2216 // skip nodes on degenerated edges
2217 if ( helper.IsDegenShape( posShapeID ) &&
2218 helper.IsDegenShape( uvPtVec[ i+1 ].node->getshapeId() ))
2221 int ngID1 = ngMesh.GetNP() + 1, ngID2 = ngID1+1;
2222 if ( onVertex || ( !wasNgMeshEmpty && onEdge ) || helper.IsRealSeam( posShapeID ))
2223 ngID1 = node2ngID.insert( make_pair( n, ngID1 )).first->second;
2224 if ( ngID1 > ngMesh.GetNP() )
2226 netgen::MeshPoint mp( netgen::Point<3> (n->X(), n->Y(), n->Z()) );
2227 ngMesh.AddPoint ( mp, 1, netgen::EDGEPOINT );
2228 nodeVec.push_back( n );
2230 else // n is in ngMesh already, and ngID2 in prev segment is wrong
2232 ngID2 = ngMesh.GetNP() + 1;
2233 if ( i > 0 ) // prev segment belongs to same wire
2235 netgen::Segment& prevSeg = ngMesh.LineSegment( ngMesh.GetNSeg() );
2242 netgen::Segment seg;
2244 seg[0] = ngID1; // ng node id
2245 seg[1] = ngID2; // ng node id
2246 seg.edgenr = ngMesh.GetNSeg() + 1; // ng segment id
2247 seg.si = faceID; // = geom.fmap.FindIndex (face);
2249 for ( int iEnd = 0; iEnd < 2; ++iEnd)
2251 const UVPtStruct& pnt = uvPtVec[ i + iEnd ];
2253 seg.epgeominfo[ iEnd ].dist = pnt.param; // param on curve
2254 seg.epgeominfo[ iEnd ].u = pnt.u;
2255 seg.epgeominfo[ iEnd ].v = pnt.v;
2257 // find out edge id and node parameter on edge
2258 onVertex = ( pnt.normParam + 1e-10 > vertexNormPar );
2259 if ( onVertex || posShapeID != posID )
2262 double normParam = pnt.normParam;
2264 normParam = 0.5 * ( uvPtVec[ i ].normParam + uvPtVec[ i+1 ].normParam );
2265 int edgeIndexInWire = wire->EdgeIndex( normParam );
2266 vertexNormPar = wire->LastParameter( edgeIndexInWire );
2267 const TopoDS_Edge& edge = wire->Edge( edgeIndexInWire );
2268 edgeID = geom.emap.FindIndex( edge );
2270 isInternalWire = ( edge.Orientation() == TopAbs_INTERNAL );
2271 // if ( onVertex ) // param on curve is different on each of two edges
2272 // seg.epgeominfo[ iEnd ].dist = helper.GetNodeU( edge, pnt.node );
2274 seg.epgeominfo[ iEnd ].edgenr = edgeID; // = geom.emap.FindIndex(edge);
2277 ngMesh.AddSegment (seg);
2279 // restrict size of elements near the segment
2280 SMESH_TNodeXYZ np1( n ), np2( uvPtVec[ i+1 ].node );
2281 // get an average size of adjacent segments to avoid sharp change of
2282 // element size (regression on issue 0020452, note 0010898)
2283 int iPrev = SMESH_MesherHelper::WrapIndex( i-1, nbSegments );
2284 int iNext = SMESH_MesherHelper::WrapIndex( i+1, nbSegments );
2285 double sumH = segLen[ iPrev ] + segLen[ i ] + segLen[ iNext ];
2286 int nbSeg = ( int( segLen[ iPrev ] > sumH / 100.) +
2287 int( segLen[ i ] > sumH / 100.) +
2288 int( segLen[ iNext ] > sumH / 100.));
2290 RestrictLocalSize( ngMesh, 0.5*(np1+np2), sumH / nbSeg, overrideMinH );
2292 if ( isInternalWire )
2294 swap (seg[0], seg[1]);
2295 swap( seg.epgeominfo[0], seg.epgeominfo[1] );
2296 seg.edgenr = ngMesh.GetNSeg() + 1; // segment id
2297 ngMesh.AddSegment (seg);
2299 } // loop on segments on a wire
2301 // close chain of segments
2302 if ( nbSegments > 0 )
2304 netgen::Segment& lastSeg = ngMesh.LineSegment( ngMesh.GetNSeg() - int( isInternalWire ));
2305 const SMDS_MeshNode * lastNode = uvPtVec.back().node;
2306 lastSeg[1] = node2ngID.insert( make_pair( lastNode, lastSeg[1] )).first->second;
2307 if ( lastSeg[1] > ngMesh.GetNP() )
2309 netgen::MeshPoint mp( netgen::Point<3> (lastNode->X(), lastNode->Y(), lastNode->Z()) );
2310 ngMesh.AddPoint ( mp, 1, netgen::EDGEPOINT );
2311 nodeVec.push_back( lastNode );
2313 if ( isInternalWire )
2315 netgen::Segment& realLastSeg = ngMesh.LineSegment( ngMesh.GetNSeg() );
2316 realLastSeg[0] = lastSeg[1];
2320 #ifdef DUMP_SEGMENTS
2321 cout << "BEGIN WIRE " << iW << endl;
2322 for ( int i = prevNbNGSeg+1; i <= ngMesh.GetNSeg(); ++i )
2324 netgen::Segment& seg = ngMesh.LineSegment( i );
2326 netgen::Segment& prevSeg = ngMesh.LineSegment( i-1 );
2327 if ( seg[0] == prevSeg[1] && seg[1] == prevSeg[0] )
2329 cout << "Segment: " << seg.edgenr << endl << "\tis REVERSE of the previous one" << endl;
2333 cout << "Segment: " << seg.edgenr << endl
2334 << "\tp1: " << seg[0] << " n" << nodeVec[ seg[0]]->GetID() << endl
2335 << "\tp2: " << seg[1] << " n" << nodeVec[ seg[1]]->GetID() << endl
2336 << "\tp0 param: " << seg.epgeominfo[ 0 ].dist << endl
2337 << "\tp0 uv: " << seg.epgeominfo[ 0 ].u <<", "<< seg.epgeominfo[ 0 ].v << endl
2338 << "\tp0 edge: " << seg.epgeominfo[ 0 ].edgenr << endl
2339 << "\tp1 param: " << seg.epgeominfo[ 1 ].dist << endl
2340 << "\tp1 uv: " << seg.epgeominfo[ 1 ].u <<", "<< seg.epgeominfo[ 1 ].v << endl
2341 << "\tp1 edge: " << seg.epgeominfo[ 1 ].edgenr << endl;
2343 cout << "--END WIRE " << iW << endl;
2345 SMESH_Comment __not_unused_variable( prevNbNGSeg );
2348 } // loop on WIREs of a FACE
2350 // add a segment instead of an internal vertex
2351 if ( wasNgMeshEmpty )
2353 NETGENPlugin_Internals intShapes( *helper.GetMesh(), helper.GetSubShape(), /*is3D=*/false );
2354 AddIntVerticesInFaces( geom, ngMesh, nodeVec, intShapes );
2356 ngMesh.CalcSurfacesOfNode();
2361 //================================================================================
2363 * \brief Fill SMESH mesh according to contents of netgen mesh
2364 * \param occgeo - container of OCCT geometry to mesh
2365 * \param ngMesh - netgen mesh
2366 * \param initState - bn of entities in netgen mesh before computing
2367 * \param sMesh - SMESH mesh to fill in
2368 * \param nodeVec - vector of nodes in which node index == netgen ID
2369 * \param comment - returns problem description
2370 * \param quadHelper - holder of medium nodes of sub-meshes
2371 * \retval int - error
2373 //================================================================================
2375 int NETGENPlugin_Mesher::FillSMesh(const netgen::OCCGeometry& occgeo,
2376 netgen::Mesh& ngMesh,
2377 const NETGENPlugin_ngMeshInfo& initState,
2379 std::vector<const SMDS_MeshNode*>& nodeVec,
2380 SMESH_Comment& comment,
2381 SMESH_MesherHelper* quadHelper)
2383 int nbNod = ngMesh.GetNP();
2384 int nbSeg = ngMesh.GetNSeg();
2385 int nbFac = ngMesh.GetNSE();
2386 int nbVol = ngMesh.GetNE();
2388 SMESHDS_Mesh* meshDS = sMesh.GetMeshDS();
2390 // quadHelper is used for either
2391 // 1) making quadratic elements when a lower dimension mesh is loaded
2392 // to SMESH before conversion to quadratic by NETGEN
2393 // 2) sewing of quadratic elements with quadratic elements of sub-meshes
2394 if ( quadHelper && !quadHelper->GetIsQuadratic() && quadHelper->GetTLinkNodeMap().empty() )
2397 int i, nbInitNod = initState._nbNodes;
2398 if ( initState._elementsRemoved )
2400 // PAL23427. Update nodeVec to track removal of netgen free points as a result
2401 // of removal of faces in FillNgMesh() in the case of a shrunk sub-mesh
2402 int ngID, nodeVecSize = nodeVec.size();
2403 const double eps = std::numeric_limits<double>::min();
2404 for ( ngID = i = 1; i < nodeVecSize; ++ngID, ++i )
2406 gp_Pnt ngPnt( NGPOINT_COORDS( ngMesh.Point( ngID )));
2407 gp_Pnt node ( SMESH_NodeXYZ ( nodeVec[ i ]));
2408 if ( ngPnt.SquareDistance( node ) < eps )
2410 nodeVec[ ngID ] = nodeVec[ i ];
2417 nodeVec.resize( ngID );
2418 nbInitNod = ngID - 1;
2420 // -------------------------------------
2421 // Create and insert nodes into nodeVec
2422 // -------------------------------------
2424 nodeVec.resize( nbNod + 1 );
2425 for ( i = nbInitNod+1; i <= nbNod; ++i )
2427 const netgen::MeshPoint& ngPoint = ngMesh.Point(i);
2428 SMDS_MeshNode* node = NULL;
2429 TopoDS_Vertex aVert;
2430 // First, netgen creates nodes on vertices in occgeo.vmap,
2431 // so node index corresponds to vertex index
2432 // but (issue 0020776) netgen does not create nodes with equal coordinates
2433 if ( i-nbInitNod <= occgeo.vmap.Extent() )
2435 gp_Pnt p ( NGPOINT_COORDS(ngPoint) );
2436 for (int iV = i-nbInitNod; aVert.IsNull() && iV <= occgeo.vmap.Extent(); ++iV)
2438 aVert = TopoDS::Vertex( occgeo.vmap( iV ));
2439 gp_Pnt pV = BRep_Tool::Pnt( aVert );
2440 if ( p.SquareDistance( pV ) > 1e-20 )
2443 node = const_cast<SMDS_MeshNode*>( SMESH_Algo::VertexNode( aVert, meshDS ));
2446 if (!node) // node not found on vertex
2448 node = meshDS->AddNode( NGPOINT_COORDS( ngPoint ));
2449 if (!aVert.IsNull())
2450 meshDS->SetNodeOnVertex(node, aVert);
2455 // -------------------------------------------
2456 // Create mesh segments along geometric edges
2457 // -------------------------------------------
2459 int nbInitSeg = initState._nbSegments;
2460 for (i = nbInitSeg+1; i <= nbSeg; ++i )
2462 const netgen::Segment& seg = ngMesh.LineSegment(i);
2464 int pinds[3] = { seg.pnums[0], seg.pnums[1], seg.pnums[2] };
2467 for (int j=0; j < 3; ++j)
2469 int pind = pinds[j];
2470 if (pind <= 0 || !nodeVec_ACCESS(pind))
2478 int aGeomEdgeInd = seg.epgeominfo[j].edgenr;
2479 if (aGeomEdgeInd > 0 && aGeomEdgeInd <= occgeo.emap.Extent())
2480 aEdge = TopoDS::Edge(occgeo.emap(aGeomEdgeInd));
2482 param = seg.epgeominfo[j].dist;
2485 else // middle point
2487 param = param2 * 0.5;
2489 if (!aEdge.IsNull() && nodeVec_ACCESS(pind)->getshapeId() < 1)
2491 meshDS->SetNodeOnEdge(nodeVec_ACCESS(pind), aEdge, param);
2496 SMDS_MeshEdge* edge = 0;
2497 if (nbp == 2) // second order ?
2499 if ( meshDS->FindEdge( nodeVec_ACCESS(pinds[0]), nodeVec_ACCESS(pinds[1])))
2501 if ( quadHelper ) // final mesh must be quadratic
2502 edge = quadHelper->AddEdge(nodeVec_ACCESS(pinds[0]), nodeVec_ACCESS(pinds[1]));
2504 edge = meshDS->AddEdge(nodeVec_ACCESS(pinds[0]), nodeVec_ACCESS(pinds[1]));
2508 if ( meshDS->FindEdge( nodeVec_ACCESS(pinds[0]), nodeVec_ACCESS(pinds[1]),
2509 nodeVec_ACCESS(pinds[2])))
2511 edge = meshDS->AddEdge(nodeVec_ACCESS(pinds[0]), nodeVec_ACCESS(pinds[1]),
2512 nodeVec_ACCESS(pinds[2]));
2516 if ( comment.empty() ) comment << "Cannot create a mesh edge";
2517 MESSAGE("Cannot create a mesh edge");
2518 nbSeg = nbFac = nbVol = 0;
2521 if ( !aEdge.IsNull() && edge->getshapeId() < 1 )
2522 meshDS->SetMeshElementOnShape(edge, aEdge);
2524 else if ( comment.empty() )
2526 comment << "Invalid netgen segment #" << i;
2530 // ----------------------------------------
2531 // Create mesh faces along geometric faces
2532 // ----------------------------------------
2534 int nbInitFac = initState._nbFaces;
2535 int quadFaceID = ngMesh.GetNFD() + 1;
2536 if ( nbInitFac < nbFac )
2537 // add a faces descriptor to exclude qudrangle elements generated by NETGEN
2538 // from computation of 3D mesh
2539 ngMesh.AddFaceDescriptor (netgen::FaceDescriptor(quadFaceID, /*solid1=*/0, /*solid2=*/0, 0));
2541 vector<const SMDS_MeshNode*> nodes;
2542 for (i = nbInitFac+1; i <= nbFac; ++i )
2544 const netgen::Element2d& elem = ngMesh.SurfaceElement(i);
2545 const int aGeomFaceInd = elem.GetIndex();
2547 if (aGeomFaceInd > 0 && aGeomFaceInd <= occgeo.fmap.Extent())
2548 aFace = TopoDS::Face(occgeo.fmap(aGeomFaceInd));
2550 for ( int j = 1; j <= elem.GetNP(); ++j )
2552 int pind = elem.PNum(j);
2553 if ( pind < 1 || pind >= (int) nodeVec.size() )
2555 if ( SMDS_MeshNode* node = nodeVec_ACCESS(pind))
2557 nodes.push_back( node );
2558 if (!aFace.IsNull() && node->getshapeId() < 1)
2560 const netgen::PointGeomInfo& pgi = elem.GeomInfoPi(j);
2561 meshDS->SetNodeOnFace(node, aFace, pgi.u, pgi.v);
2565 if ((int) nodes.size() != elem.GetNP() )
2567 if ( comment.empty() )
2568 comment << "Invalid netgen 2d element #" << i;
2569 continue; // bad node ids
2571 SMDS_MeshFace* face = NULL;
2572 switch (elem.GetType())
2575 if ( quadHelper ) // final mesh must be quadratic
2576 face = quadHelper->AddFace(nodes[0],nodes[1],nodes[2]);
2578 face = meshDS->AddFace(nodes[0],nodes[1],nodes[2]);
2581 if ( quadHelper ) // final mesh must be quadratic
2582 face = quadHelper->AddFace(nodes[0],nodes[1],nodes[2],nodes[3]);
2584 face = meshDS->AddFace(nodes[0],nodes[1],nodes[2],nodes[3]);
2585 // exclude qudrangle elements from computation of 3D mesh
2586 const_cast< netgen::Element2d& >( elem ).SetIndex( quadFaceID );
2589 nodes[5] = mediumNode( nodes[0],nodes[1],nodes[5], quadHelper );
2590 nodes[3] = mediumNode( nodes[1],nodes[2],nodes[3], quadHelper );
2591 nodes[4] = mediumNode( nodes[2],nodes[0],nodes[4], quadHelper );
2592 face = meshDS->AddFace(nodes[0],nodes[1],nodes[2],nodes[5],nodes[3],nodes[4]);
2595 nodes[4] = mediumNode( nodes[0],nodes[1],nodes[4], quadHelper );
2596 nodes[7] = mediumNode( nodes[1],nodes[2],nodes[7], quadHelper );
2597 nodes[5] = mediumNode( nodes[2],nodes[3],nodes[5], quadHelper );
2598 nodes[6] = mediumNode( nodes[3],nodes[0],nodes[6], quadHelper );
2599 face = meshDS->AddFace(nodes[0],nodes[1],nodes[2],nodes[3],
2600 nodes[4],nodes[7],nodes[5],nodes[6]);
2601 // exclude qudrangle elements from computation of 3D mesh
2602 const_cast< netgen::Element2d& >( elem ).SetIndex( quadFaceID );
2605 MESSAGE("NETGEN created a face of unexpected type, ignoring");
2610 if ( comment.empty() ) comment << "Cannot create a mesh face";
2611 MESSAGE("Cannot create a mesh face");
2612 nbSeg = nbFac = nbVol = 0;
2615 if ( !aFace.IsNull() )
2616 meshDS->SetMeshElementOnShape( face, aFace );
2619 // ------------------
2620 // Create tetrahedra
2621 // ------------------
2623 for ( i = 1; i <= nbVol; ++i )
2625 const netgen::Element& elem = ngMesh.VolumeElement(i);
2626 int aSolidInd = elem.GetIndex();
2627 TopoDS_Solid aSolid;
2628 if ( aSolidInd > 0 && aSolidInd <= occgeo.somap.Extent() )
2629 aSolid = TopoDS::Solid(occgeo.somap(aSolidInd));
2631 for ( int j = 1; j <= elem.GetNP(); ++j )
2633 int pind = elem.PNum(j);
2634 if ( pind < 1 || pind >= (int)nodeVec.size() )
2636 if ( SMDS_MeshNode* node = nodeVec_ACCESS(pind) )
2638 nodes.push_back(node);
2639 if ( !aSolid.IsNull() && node->getshapeId() < 1 )
2640 meshDS->SetNodeInVolume(node, aSolid);
2643 if ((int) nodes.size() != elem.GetNP() )
2645 if ( comment.empty() )
2646 comment << "Invalid netgen 3d element #" << i;
2649 SMDS_MeshVolume* vol = NULL;
2650 switch ( elem.GetType() )
2653 vol = meshDS->AddVolume(nodes[0],nodes[1],nodes[2],nodes[3]);
2656 nodes[4] = mediumNode( nodes[0],nodes[1],nodes[4], quadHelper );
2657 nodes[7] = mediumNode( nodes[1],nodes[2],nodes[7], quadHelper );
2658 nodes[5] = mediumNode( nodes[2],nodes[0],nodes[5], quadHelper );
2659 nodes[6] = mediumNode( nodes[0],nodes[3],nodes[6], quadHelper );
2660 nodes[8] = mediumNode( nodes[1],nodes[3],nodes[8], quadHelper );
2661 nodes[9] = mediumNode( nodes[2],nodes[3],nodes[9], quadHelper );
2662 vol = meshDS->AddVolume(nodes[0],nodes[1],nodes[2],nodes[3],
2663 nodes[4],nodes[7],nodes[5],nodes[6],nodes[8],nodes[9]);
2666 MESSAGE("NETGEN created a volume of unexpected type, ignoring");
2671 if ( comment.empty() ) comment << "Cannot create a mesh volume";
2672 MESSAGE("Cannot create a mesh volume");
2673 nbSeg = nbFac = nbVol = 0;
2676 if (!aSolid.IsNull())
2677 meshDS->SetMeshElementOnShape(vol, aSolid);
2679 return comment.empty() ? 0 : 1;
2684 //================================================================================
2686 * \brief Convert error into text
2688 //================================================================================
2690 std::string text(int err)
2695 SMESH_Comment("Error in netgen::OCCGenerateMesh() at ") << netgen::multithread.task;
2698 //================================================================================
2700 * \brief Convert exception into text
2702 //================================================================================
2704 std::string text(Standard_Failure& ex)
2706 SMESH_Comment str("Exception in netgen::OCCGenerateMesh()");
2707 str << " at " << netgen::multithread.task
2708 << ": " << ex.DynamicType()->Name();
2709 if ( ex.GetMessageString() && strlen( ex.GetMessageString() ))
2710 str << ": " << ex.GetMessageString();
2713 //================================================================================
2715 * \brief Convert exception into text
2717 //================================================================================
2719 std::string text(netgen::NgException& ex)
2721 SMESH_Comment str("NgException");
2722 if ( strlen( netgen::multithread.task ) > 0 )
2723 str << " at " << netgen::multithread.task;
2724 str << ": " << ex.What();
2728 //================================================================================
2730 * \brief Looks for triangles lying on a SOLID
2732 //================================================================================
2734 bool hasBadElemOnSolid( const list<const SMDS_MeshElement*>& elems,
2735 SMESH_subMesh* solidSM )
2737 TopTools_IndexedMapOfShape solidSubs;
2738 TopExp::MapShapes( solidSM->GetSubShape(), solidSubs );
2739 SMESHDS_Mesh* mesh = solidSM->GetFather()->GetMeshDS();
2741 list<const SMDS_MeshElement*>::const_iterator e = elems.begin();
2742 for ( ; e != elems.end(); ++e )
2744 const SMDS_MeshElement* elem = *e;
2745 // if ( elem->GetType() != SMDSAbs_Face ) -- 23047
2747 int nbNodesOnSolid = 0, nbNodes = elem->NbNodes();
2748 SMDS_NodeIteratorPtr nIt = elem->nodeIterator();
2749 while ( nIt->more() )
2751 const SMDS_MeshNode* n = nIt->next();
2752 const TopoDS_Shape& s = mesh->IndexToShape( n->getshapeId() );
2753 nbNodesOnSolid += ( !s.IsNull() && solidSubs.Contains( s ));
2754 if ( nbNodesOnSolid > 2 ||
2755 nbNodesOnSolid == nbNodes)
2762 const double edgeMeshingTime = 0.001;
2763 const double faceMeshingTime = 0.019;
2764 const double edgeFaceMeshingTime = edgeMeshingTime + faceMeshingTime;
2765 const double faceOptimizTime = 0.06;
2766 const double voluMeshingTime = 0.15;
2767 const double volOptimizeTime = 0.77;
2770 //=============================================================================
2772 * Here we are going to use the NETGEN mesher
2774 //=============================================================================
2776 bool NETGENPlugin_Mesher::Compute()
2778 NETGENPlugin_NetgenLibWrapper ngLib;
2780 netgen::MeshingParameters& mparams = netgen::mparam;
2782 SMESH_ComputeErrorPtr error = SMESH_ComputeError::New();
2783 SMESH_MesherHelper quadHelper( *_mesh );
2784 quadHelper.SetIsQuadratic( mparams.secondorder );
2786 // -------------------------
2787 // Prepare OCC geometry
2788 // -------------------------
2790 netgen::OCCGeometry occgeo;
2791 list< SMESH_subMesh* > meshedSM[3]; // for 0-2 dimensions
2792 NETGENPlugin_Internals internals( *_mesh, _shape, _isVolume );
2793 PrepareOCCgeometry( occgeo, _shape, *_mesh, meshedSM, &internals );
2796 _totalTime = edgeFaceMeshingTime;
2798 _totalTime += faceOptimizTime;
2800 _totalTime += voluMeshingTime + ( _optimize ? volOptimizeTime : 0 );
2801 double doneTime = 0;
2804 _curShapeIndex = -1;
2806 // -------------------------
2807 // Generate the mesh
2808 // -------------------------
2811 NETGENPlugin_ngMeshInfo initState; // it remembers size of ng mesh equal to size of Smesh
2813 SMESH_Comment comment;
2816 // vector of nodes in which node index == netgen ID
2817 vector< const SMDS_MeshNode* > nodeVec;
2825 // not to RestrictLocalH() according to curvature during MESHCONST_ANALYSE
2826 mparams.uselocalh = false;
2827 mparams.grading = 0.8; // not limitited size growth
2829 if ( _simpleHyp->GetNumberOfSegments() )
2831 mparams.maxh = occgeo.boundingbox.Diam();
2834 mparams.maxh = _simpleHyp->GetLocalLength();
2837 if ( mparams.maxh == 0.0 )
2838 mparams.maxh = occgeo.boundingbox.Diam();
2839 if ( _simpleHyp || ( mparams.minh == 0.0 && _fineness != NETGENPlugin_Hypothesis::UserDefined))
2840 mparams.minh = GetDefaultMinSize( _shape, mparams.maxh );
2842 // Local size on faces
2843 occgeo.face_maxh = mparams.maxh;
2845 // Let netgen create _ngMesh and calculate element size on not meshed shapes
2849 int startWith = netgen::MESHCONST_ANALYSE;
2850 int endWith = netgen::MESHCONST_ANALYSE;
2855 err = netgen::OCCGenerateMesh(occgeo, _ngMesh, mparams, startWith, endWith);
2857 err = netgen::OCCGenerateMesh(occgeo, _ngMesh, startWith, endWith, optstr);
2859 if(netgen::multithread.terminate)
2862 comment << text(err);
2864 catch (Standard_Failure& ex)
2866 comment << text(ex);
2868 catch (netgen::NgException & ex)
2870 comment << text(ex);
2871 if ( mparams.meshsizefilename )
2872 throw SMESH_ComputeError(COMPERR_BAD_PARMETERS, comment );
2874 err = 0; //- MESHCONST_ANALYSE isn't so important step
2877 ngLib.setMesh(( Ng_Mesh*) _ngMesh );
2879 _ngMesh->ClearFaceDescriptors(); // we make descriptors our-self
2881 if ( !mparams.uselocalh ) // mparams.grading is not taken into account yet
2882 _ngMesh->LocalHFunction().SetGrading( mparams.grading );
2886 // Pass 1D simple parameters to NETGEN
2887 // --------------------------------
2888 int nbSeg = _simpleHyp->GetNumberOfSegments();
2889 double segSize = _simpleHyp->GetLocalLength();
2890 for ( int iE = 1; iE <= occgeo.emap.Extent(); ++iE )
2892 const TopoDS_Edge& e = TopoDS::Edge( occgeo.emap(iE));
2894 segSize = SMESH_Algo::EdgeLength( e ) / ( nbSeg - 0.4 );
2895 setLocalSize( e, segSize, *_ngMesh );
2898 else // if ( ! _simpleHyp )
2900 // Local size on shapes
2901 SetLocalSize( occgeo, *_ngMesh );
2902 SetLocalSizeForChordalError( occgeo, *_ngMesh );
2905 // Precompute internal edges (issue 0020676) in order to
2906 // add mesh on them correctly (twice) to netgen mesh
2907 if ( !err && internals.hasInternalEdges() )
2909 // load internal shapes into OCCGeometry
2910 netgen::OCCGeometry intOccgeo;
2911 internals.getInternalEdges( intOccgeo.fmap, intOccgeo.emap, intOccgeo.vmap, meshedSM );
2912 intOccgeo.boundingbox = occgeo.boundingbox;
2913 intOccgeo.shape = occgeo.shape;
2914 intOccgeo.face_maxh.SetSize(intOccgeo.fmap.Extent());
2915 intOccgeo.face_maxh = netgen::mparam.maxh;
2916 netgen::Mesh *tmpNgMesh = NULL;
2920 // compute local H on internal shapes in the main mesh
2921 //OCCSetLocalMeshSize(intOccgeo, *_ngMesh); it deletes _ngMesh->localH
2923 // let netgen create a temporary mesh
2925 netgen::OCCGenerateMesh(intOccgeo, tmpNgMesh, mparams, startWith, endWith);
2927 netgen::OCCGenerateMesh(intOccgeo, tmpNgMesh, startWith, endWith, optstr);
2929 if(netgen::multithread.terminate)
2932 // copy LocalH from the main to temporary mesh
2933 initState.transferLocalH( _ngMesh, tmpNgMesh );
2935 // compute mesh on internal edges
2936 startWith = endWith = netgen::MESHCONST_MESHEDGES;
2938 err = netgen::OCCGenerateMesh(intOccgeo, tmpNgMesh, mparams, startWith, endWith);
2940 err = netgen::OCCGenerateMesh(intOccgeo, tmpNgMesh, startWith, endWith, optstr);
2942 comment << text(err);
2944 catch (Standard_Failure& ex)
2946 comment << text(ex);
2949 initState.restoreLocalH( tmpNgMesh );
2951 // fill SMESH by netgen mesh
2952 vector< const SMDS_MeshNode* > tmpNodeVec;
2953 FillSMesh( intOccgeo, *tmpNgMesh, initState, *_mesh, tmpNodeVec, comment );
2954 err = ( err || !comment.empty() );
2956 nglib::Ng_DeleteMesh((nglib::Ng_Mesh*)tmpNgMesh);
2959 // Fill _ngMesh with nodes and segments of computed submeshes
2962 err = ! ( FillNgMesh(occgeo, *_ngMesh, nodeVec, meshedSM[ MeshDim_0D ]) &&
2963 FillNgMesh(occgeo, *_ngMesh, nodeVec, meshedSM[ MeshDim_1D ], &quadHelper));
2965 initState = NETGENPlugin_ngMeshInfo(_ngMesh);
2970 startWith = endWith = netgen::MESHCONST_MESHEDGES;
2975 err = netgen::OCCGenerateMesh(occgeo, _ngMesh, mparams, startWith, endWith);
2977 err = netgen::OCCGenerateMesh(occgeo, _ngMesh, startWith, endWith, optstr);
2979 if(netgen::multithread.terminate)
2982 comment << text(err);
2984 catch (Standard_Failure& ex)
2986 comment << text(ex);
2991 _ticTime = ( doneTime += edgeMeshingTime ) / _totalTime / _progressTic;
2993 mparams.uselocalh = true; // restore as it is used at surface optimization
2995 // ---------------------
2996 // compute surface mesh
2997 // ---------------------
3000 // Pass 2D simple parameters to NETGEN
3002 if ( double area = _simpleHyp->GetMaxElementArea() ) {
3004 mparams.maxh = sqrt(2. * area/sqrt(3.0));
3005 mparams.grading = 0.4; // moderate size growth
3008 // length from edges
3009 if ( _ngMesh->GetNSeg() ) {
3010 double edgeLength = 0;
3011 TopTools_MapOfShape visitedEdges;
3012 for ( TopExp_Explorer exp( _shape, TopAbs_EDGE ); exp.More(); exp.Next() )
3013 if( visitedEdges.Add(exp.Current()) )
3014 edgeLength += SMESH_Algo::EdgeLength( TopoDS::Edge( exp.Current() ));
3015 // we have to multiply length by 2 since for each TopoDS_Edge there
3016 // are double set of NETGEN edges, in other words, we have to
3017 // divide _ngMesh->GetNSeg() by 2.
3018 mparams.maxh = 2*edgeLength / _ngMesh->GetNSeg();
3021 mparams.maxh = 1000;
3023 mparams.grading = 0.2; // slow size growth
3025 mparams.quad = _simpleHyp->GetAllowQuadrangles();
3026 mparams.maxh = min( mparams.maxh, occgeo.boundingbox.Diam()/2 );
3027 _ngMesh->SetGlobalH (mparams.maxh);
3028 netgen::Box<3> bb = occgeo.GetBoundingBox();
3029 bb.Increase (bb.Diam()/20);
3030 _ngMesh->SetLocalH (bb.PMin(), bb.PMax(), mparams.grading);
3033 // Care of vertices internal in faces (issue 0020676)
3034 if ( internals.hasInternalVertexInFace() )
3036 // store computed segments in SMESH in order not to create SMESH
3037 // edges for ng segments added by AddIntVerticesInFaces()
3038 FillSMesh( occgeo, *_ngMesh, initState, *_mesh, nodeVec, comment );
3039 // add segments to faces with internal vertices
3040 AddIntVerticesInFaces( occgeo, *_ngMesh, nodeVec, internals );
3041 initState = NETGENPlugin_ngMeshInfo(_ngMesh);
3044 // Build viscous layers
3045 if ( _isViscousLayers2D ||
3046 StdMeshers_ViscousLayers2D::HasProxyMesh( TopoDS::Face( occgeo.fmap(1) ), *_mesh ))
3048 if ( !internals.hasInternalVertexInFace() ) {
3049 FillSMesh( occgeo, *_ngMesh, initState, *_mesh, nodeVec, comment );
3050 initState = NETGENPlugin_ngMeshInfo(_ngMesh);
3052 SMESH_ProxyMesh::Ptr viscousMesh;
3053 SMESH_MesherHelper helper( *_mesh );
3054 for ( int faceID = 1; faceID <= occgeo.fmap.Extent(); ++faceID )
3056 const TopoDS_Face& F = TopoDS::Face( occgeo.fmap( faceID ));
3057 viscousMesh = StdMeshers_ViscousLayers2D::Compute( *_mesh, F );
3060 if ( viscousMesh->NbProxySubMeshes() == 0 )
3062 // exclude from computation ng segments built on EDGEs of F
3063 for (int i = 1; i <= _ngMesh->GetNSeg(); i++)
3065 netgen::Segment & seg = _ngMesh->LineSegment(i);
3066 if (seg.si == faceID)
3069 // add new segments to _ngMesh instead of excluded ones
3070 helper.SetSubShape( F );
3072 StdMeshers_FaceSide::GetFaceWires( F, *_mesh, /*skipMediumNodes=*/true,
3073 error, &helper, viscousMesh );
3074 error = AddSegmentsToMesh( *_ngMesh, occgeo, wires, helper, nodeVec );
3076 if ( !error ) error = SMESH_ComputeError::New();
3078 initState = NETGENPlugin_ngMeshInfo(_ngMesh);
3081 // Let netgen compute 2D mesh
3082 startWith = netgen::MESHCONST_MESHSURFACE;
3083 endWith = _optimize ? netgen::MESHCONST_OPTSURFACE : netgen::MESHCONST_MESHSURFACE;
3088 err = netgen::OCCGenerateMesh(occgeo, _ngMesh, mparams, startWith, endWith);
3090 err = netgen::OCCGenerateMesh(occgeo, _ngMesh, startWith, endWith, optstr);
3092 if(netgen::multithread.terminate)
3095 comment << text (err);
3097 catch (Standard_Failure& ex)
3099 comment << text(ex);
3100 //err = 1; -- try to make volumes anyway
3102 catch (netgen::NgException exc)
3104 comment << text(exc);
3105 //err = 1; -- try to make volumes anyway
3110 doneTime += faceMeshingTime + ( _optimize ? faceOptimizTime : 0 );
3111 _ticTime = doneTime / _totalTime / _progressTic;
3113 // ---------------------
3114 // generate volume mesh
3115 // ---------------------
3116 // Fill _ngMesh with nodes and faces of computed 2D submeshes
3117 if ( !err && _isVolume &&
3118 ( !meshedSM[ MeshDim_2D ].empty() || mparams.quad || _viscousLayersHyp ))
3120 // load SMESH with computed segments and faces
3121 FillSMesh( occgeo, *_ngMesh, initState, *_mesh, nodeVec, comment, &quadHelper );
3123 // compute prismatic boundary volumes
3124 int nbQuad = _mesh->NbQuadrangles();
3125 SMESH_ProxyMesh::Ptr viscousMesh;
3126 if ( _viscousLayersHyp )
3128 viscousMesh = _viscousLayersHyp->Compute( *_mesh, _shape );
3132 // compute pyramids on quadrangles
3133 vector<SMESH_ProxyMesh::Ptr> pyramidMeshes( occgeo.somap.Extent() );
3135 for ( int iS = 1; iS <= occgeo.somap.Extent(); ++iS )
3137 StdMeshers_QuadToTriaAdaptor* adaptor = new StdMeshers_QuadToTriaAdaptor;
3138 pyramidMeshes[ iS-1 ].reset( adaptor );
3139 bool ok = adaptor->Compute( *_mesh, occgeo.somap(iS), viscousMesh.get() );
3143 // add proxy faces to NG mesh
3144 list< SMESH_subMesh* > viscousSM;
3145 for ( int iS = 1; iS <= occgeo.somap.Extent(); ++iS )
3147 list< SMESH_subMesh* > quadFaceSM;
3148 for (TopExp_Explorer face(occgeo.somap(iS), TopAbs_FACE); face.More(); face.Next())
3149 if ( pyramidMeshes[iS-1] && pyramidMeshes[iS-1]->GetProxySubMesh( face.Current() ))
3151 quadFaceSM.push_back( _mesh->GetSubMesh( face.Current() ));
3152 meshedSM[ MeshDim_2D ].remove( quadFaceSM.back() );
3154 else if ( viscousMesh && viscousMesh->GetProxySubMesh( face.Current() ))
3156 viscousSM.push_back( _mesh->GetSubMesh( face.Current() ));
3157 meshedSM[ MeshDim_2D ].remove( viscousSM.back() );
3159 if ( !quadFaceSM.empty() )
3160 FillNgMesh(occgeo, *_ngMesh, nodeVec, quadFaceSM, &quadHelper, pyramidMeshes[iS-1]);
3162 if ( !viscousSM.empty() )
3163 FillNgMesh(occgeo, *_ngMesh, nodeVec, viscousSM, &quadHelper, viscousMesh );
3165 // fill _ngMesh with faces of sub-meshes
3166 err = ! ( FillNgMesh(occgeo, *_ngMesh, nodeVec, meshedSM[ MeshDim_2D ], &quadHelper));
3167 initState = NETGENPlugin_ngMeshInfo(_ngMesh, /*checkRemovedElems=*/true);
3168 // toPython( _ngMesh );
3170 if (!err && _isVolume)
3172 // Pass 3D simple parameters to NETGEN
3173 const NETGENPlugin_SimpleHypothesis_3D* simple3d =
3174 dynamic_cast< const NETGENPlugin_SimpleHypothesis_3D* > ( _simpleHyp );
3176 if ( double vol = simple3d->GetMaxElementVolume() ) {
3178 mparams.maxh = pow( 72, 1/6. ) * pow( vol, 1/3. );
3179 mparams.maxh = min( mparams.maxh, occgeo.boundingbox.Diam()/2 );
3182 // length from faces
3183 mparams.maxh = _ngMesh->AverageH();
3185 _ngMesh->SetGlobalH (mparams.maxh);
3186 mparams.grading = 0.4;
3188 _ngMesh->CalcLocalH(mparams.grading);
3190 _ngMesh->CalcLocalH();
3193 // Care of vertices internal in solids and internal faces (issue 0020676)
3194 if ( internals.hasInternalVertexInSolid() || internals.hasInternalFaces() )
3196 // store computed faces in SMESH in order not to create SMESH
3197 // faces for ng faces added here
3198 FillSMesh( occgeo, *_ngMesh, initState, *_mesh, nodeVec, comment, &quadHelper );
3199 // add ng faces to solids with internal vertices
3200 AddIntVerticesInSolids( occgeo, *_ngMesh, nodeVec, internals );
3201 // duplicate mesh faces on internal faces
3202 FixIntFaces( occgeo, *_ngMesh, internals );
3203 initState = NETGENPlugin_ngMeshInfo(_ngMesh);
3205 // Let netgen compute 3D mesh
3206 startWith = endWith = netgen::MESHCONST_MESHVOLUME;
3211 err = netgen::OCCGenerateMesh(occgeo, _ngMesh, mparams, startWith, endWith);
3213 err = netgen::OCCGenerateMesh(occgeo, _ngMesh, startWith, endWith, optstr);
3215 if(netgen::multithread.terminate)
3218 if ( comment.empty() ) // do not overwrite a previos error
3219 comment << text(err);
3221 catch (Standard_Failure& ex)
3223 if ( comment.empty() ) // do not overwrite a previos error
3224 comment << text(ex);
3227 catch (netgen::NgException exc)
3229 if ( comment.empty() ) // do not overwrite a previos error
3230 comment << text(exc);
3233 _ticTime = ( doneTime += voluMeshingTime ) / _totalTime / _progressTic;
3235 // Let netgen optimize 3D mesh
3236 if ( !err && _optimize )
3238 startWith = endWith = netgen::MESHCONST_OPTVOLUME;
3243 err = netgen::OCCGenerateMesh(occgeo, _ngMesh, mparams, startWith, endWith);
3245 err = netgen::OCCGenerateMesh(occgeo, _ngMesh, startWith, endWith, optstr);
3247 if(netgen::multithread.terminate)
3250 if ( comment.empty() ) // do not overwrite a previos error
3251 comment << text(err);
3253 catch (Standard_Failure& ex)
3255 if ( comment.empty() ) // do not overwrite a previos error
3256 comment << text(ex);
3258 catch (netgen::NgException exc)
3260 if ( comment.empty() ) // do not overwrite a previos error
3261 comment << text(exc);
3265 if (!err && mparams.secondorder > 0)
3270 if ( !meshedSM[ MeshDim_1D ].empty() )
3272 // remove segments not attached to geometry (IPAL0052479)
3273 for (int i = 1; i <= _ngMesh->GetNSeg(); ++i)
3275 const netgen::Segment & seg = _ngMesh->LineSegment (i);
3276 if ( seg.epgeominfo[ 0 ].edgenr == 0 )
3277 _ngMesh->DeleteSegment( i );
3279 _ngMesh->Compress();
3281 // convert to quadratic
3282 netgen::OCCRefinementSurfaces ref (occgeo);
3283 ref.MakeSecondOrder (*_ngMesh);
3285 // care of elements already loaded to SMESH
3286 // if ( initState._nbSegments > 0 )
3287 // makeQuadratic( occgeo.emap, _mesh );
3288 // if ( initState._nbFaces > 0 )
3289 // makeQuadratic( occgeo.fmap, _mesh );
3291 catch (Standard_Failure& ex)
3293 if ( comment.empty() ) // do not overwrite a previos error
3294 comment << "Exception in netgen at passing to 2nd order ";
3296 catch (netgen::NgException exc)
3298 if ( comment.empty() ) // do not overwrite a previos error
3299 comment << exc.What();
3304 _ticTime = 0.98 / _progressTic;
3306 //int nbNod = _ngMesh->GetNP();
3307 //int nbSeg = _ngMesh->GetNSeg();
3308 int nbFac = _ngMesh->GetNSE();
3309 int nbVol = _ngMesh->GetNE();
3310 bool isOK = ( !err && (_isVolume ? (nbVol > 0) : (nbFac > 0)) );
3312 // Feed back the SMESHDS with the generated Nodes and Elements
3313 if ( true /*isOK*/ ) // get whatever built
3315 FillSMesh( occgeo, *_ngMesh, initState, *_mesh, nodeVec, comment, &quadHelper );
3317 if ( quadHelper.GetIsQuadratic() ) // remove free nodes
3318 for ( size_t i = 0; i < nodeVec.size(); ++i )
3319 if ( nodeVec[i] && nodeVec[i]->NbInverseElements() == 0 )
3320 _mesh->GetMeshDS()->RemoveFreeNode( nodeVec[i], 0, /*fromGroups=*/false );
3322 SMESH_ComputeErrorPtr readErr = ReadErrors(nodeVec);
3323 if ( readErr && readErr->HasBadElems() )
3326 if ( !comment.empty() && !readErr->myComment.empty() ) comment += "\n";
3327 comment += readErr->myComment;
3329 if ( error->IsOK() && ( !isOK || comment.size() > 0 ))
3330 error->myName = COMPERR_ALGO_FAILED;
3331 if ( !comment.empty() )
3332 error->myComment = comment;
3334 // SetIsAlwaysComputed( true ) to empty sub-meshes, which
3335 // appear if the geometry contains coincident sub-shape due
3336 // to bool merge_solids = 1; in netgen/libsrc/occ/occgenmesh.cpp
3337 const int nbMaps = 2;
3338 const TopTools_IndexedMapOfShape* geoMaps[nbMaps] =
3339 { & occgeo.vmap, & occgeo.emap/*, & occgeo.fmap*/ };
3340 for ( int iMap = 0; iMap < nbMaps; ++iMap )
3341 for (int i = 1; i <= geoMaps[iMap]->Extent(); i++)
3342 if ( SMESH_subMesh* sm = _mesh->GetSubMeshContaining( geoMaps[iMap]->FindKey(i)))
3343 if ( !sm->IsMeshComputed() )
3344 sm->SetIsAlwaysComputed( true );
3346 // set bad compute error to subshapes of all failed sub-shapes
3347 if ( !error->IsOK() )
3349 bool pb2D = false, pb3D = false;
3350 for (int i = 1; i <= occgeo.fmap.Extent(); i++) {
3351 int status = occgeo.facemeshstatus[i-1];
3352 if (status == netgen::FACE_MESHED_OK ) continue;
3353 if ( SMESH_subMesh* sm = _mesh->GetSubMeshContaining( occgeo.fmap( i ))) {
3354 SMESH_ComputeErrorPtr& smError = sm->GetComputeError();
3355 if ( !smError || smError->IsOK() ) {
3356 if ( status == netgen::FACE_FAILED )
3357 smError.reset( new SMESH_ComputeError( *error ));
3359 smError.reset( new SMESH_ComputeError( COMPERR_ALGO_FAILED, "Ignored" ));
3360 if ( SMESH_Algo::GetMeshError( sm ) == SMESH_Algo::MEr_OK )
3361 smError->myName = COMPERR_WARNING;
3363 pb2D = pb2D || smError->IsKO();
3366 if ( !pb2D ) // all faces are OK
3367 for (int i = 1; i <= occgeo.somap.Extent(); i++)
3368 if ( SMESH_subMesh* sm = _mesh->GetSubMeshContaining( occgeo.somap( i )))
3370 bool smComputed = nbVol && !sm->IsEmpty();
3371 if ( smComputed && internals.hasInternalVertexInSolid( sm->GetId() ))
3373 int nbIntV = internals.getSolidsWithVertices().find( sm->GetId() )->second.size();
3374 SMESHDS_SubMesh* smDS = sm->GetSubMeshDS();
3375 smComputed = ( smDS->NbElements() > 0 || smDS->NbNodes() > nbIntV );
3377 SMESH_ComputeErrorPtr& smError = sm->GetComputeError();
3378 if ( !smComputed && ( !smError || smError->IsOK() ))
3380 smError.reset( new SMESH_ComputeError( *error ));
3381 if ( nbVol && SMESH_Algo::GetMeshError( sm ) == SMESH_Algo::MEr_OK )
3383 smError->myName = COMPERR_WARNING;
3385 else if ( smError->HasBadElems() ) // bad surface mesh
3387 if ( !hasBadElemOnSolid
3388 ( static_cast<SMESH_BadInputElements*>( smError.get() )->myBadElements, sm ))
3392 pb3D = pb3D || ( smError && smError->IsKO() );
3394 if ( !pb2D && !pb3D )
3395 err = 0; // no fatal errors, only warnings
3398 ngLib._isComputeOk = !err;
3403 //=============================================================================
3407 //=============================================================================
3408 bool NETGENPlugin_Mesher::Evaluate(MapShapeNbElems& aResMap)
3410 netgen::MeshingParameters& mparams = netgen::mparam;
3413 // -------------------------
3414 // Prepare OCC geometry
3415 // -------------------------
3416 netgen::OCCGeometry occgeo;
3417 list< SMESH_subMesh* > meshedSM[4]; // for 0-3 dimensions
3418 NETGENPlugin_Internals internals( *_mesh, _shape, _isVolume );
3419 PrepareOCCgeometry( occgeo, _shape, *_mesh, meshedSM, &internals );
3421 bool tooManyElems = false;
3422 const int hugeNb = std::numeric_limits<int>::max() / 100;
3427 // pass 1D simple parameters to NETGEN
3430 // not to RestrictLocalH() according to curvature during MESHCONST_ANALYSE
3431 mparams.uselocalh = false;
3432 mparams.grading = 0.8; // not limitited size growth
3434 if ( _simpleHyp->GetNumberOfSegments() )
3436 mparams.maxh = occgeo.boundingbox.Diam();
3439 mparams.maxh = _simpleHyp->GetLocalLength();
3442 if ( mparams.maxh == 0.0 )
3443 mparams.maxh = occgeo.boundingbox.Diam();
3444 if ( _simpleHyp || ( mparams.minh == 0.0 && _fineness != NETGENPlugin_Hypothesis::UserDefined))
3445 mparams.minh = GetDefaultMinSize( _shape, mparams.maxh );
3447 // let netgen create _ngMesh and calculate element size on not meshed shapes
3448 NETGENPlugin_NetgenLibWrapper ngLib;
3449 netgen::Mesh *ngMesh = NULL;
3453 int startWith = netgen::MESHCONST_ANALYSE;
3454 int endWith = netgen::MESHCONST_MESHEDGES;
3456 int err = netgen::OCCGenerateMesh(occgeo, ngMesh, mparams, startWith, endWith);
3458 int err = netgen::OCCGenerateMesh(occgeo, ngMesh, startWith, endWith, optstr);
3461 if(netgen::multithread.terminate)
3464 ngLib.setMesh(( Ng_Mesh*) ngMesh );
3466 if ( SMESH_subMesh* sm = _mesh->GetSubMeshContaining( _shape ))
3467 sm->GetComputeError().reset( new SMESH_ComputeError( COMPERR_ALGO_FAILED ));
3470 // if ( _simpleHyp )
3472 // // Pass 1D simple parameters to NETGEN
3473 // // --------------------------------
3474 // int nbSeg = _simpleHyp->GetNumberOfSegments();
3475 // double segSize = _simpleHyp->GetLocalLength();
3476 // for ( int iE = 1; iE <= occgeo.emap.Extent(); ++iE )
3478 // const TopoDS_Edge& e = TopoDS::Edge( occgeo.emap(iE));
3480 // segSize = SMESH_Algo::EdgeLength( e ) / ( nbSeg - 0.4 );
3481 // setLocalSize( e, segSize, *ngMesh );
3484 // else // if ( ! _simpleHyp )
3486 // // Local size on shapes
3487 // SetLocalSize( occgeo, *ngMesh );
3489 // calculate total nb of segments and length of edges
3490 double fullLen = 0.0;
3492 int entity = mparams.secondorder > 0 ? SMDSEntity_Quad_Edge : SMDSEntity_Edge;
3493 TopTools_DataMapOfShapeInteger Edge2NbSeg;
3494 for (TopExp_Explorer exp(_shape, TopAbs_EDGE); exp.More(); exp.Next())
3496 TopoDS_Edge E = TopoDS::Edge( exp.Current() );
3497 if( !Edge2NbSeg.Bind(E,0) )
3500 double aLen = SMESH_Algo::EdgeLength(E);
3503 vector<int>& aVec = aResMap[_mesh->GetSubMesh(E)];
3505 aVec.resize( SMDSEntity_Last, 0);
3507 fullNbSeg += aVec[ entity ];
3510 // store nb of segments computed by Netgen
3511 NCollection_Map<Link> linkMap;
3512 for (int i = 1; i <= ngMesh->GetNSeg(); ++i )
3514 const netgen::Segment& seg = ngMesh->LineSegment(i);
3515 Link link(seg[0], seg[1]);
3516 if ( !linkMap.Add( link )) continue;
3517 int aGeomEdgeInd = seg.epgeominfo[0].edgenr;
3518 if (aGeomEdgeInd > 0 && aGeomEdgeInd <= occgeo.emap.Extent())
3520 vector<int>& aVec = aResMap[_mesh->GetSubMesh(occgeo.emap(aGeomEdgeInd))];
3524 // store nb of nodes on edges computed by Netgen
3525 TopTools_DataMapIteratorOfDataMapOfShapeInteger Edge2NbSegIt(Edge2NbSeg);
3526 for (; Edge2NbSegIt.More(); Edge2NbSegIt.Next())
3528 vector<int>& aVec = aResMap[_mesh->GetSubMesh(Edge2NbSegIt.Key())];
3529 if ( aVec[ entity ] > 1 && aVec[ SMDSEntity_Node ] == 0 )
3530 aVec[SMDSEntity_Node] = mparams.secondorder > 0 ? 2*aVec[ entity ]-1 : aVec[ entity ]-1;
3532 fullNbSeg += aVec[ entity ];
3533 Edge2NbSeg( Edge2NbSegIt.Key() ) = aVec[ entity ];
3535 if ( fullNbSeg == 0 )
3542 if ( double area = _simpleHyp->GetMaxElementArea() ) {
3544 mparams.maxh = sqrt(2. * area/sqrt(3.0));
3545 mparams.grading = 0.4; // moderate size growth
3548 // length from edges
3549 mparams.maxh = fullLen/fullNbSeg;
3550 mparams.grading = 0.2; // slow size growth
3553 mparams.maxh = min( mparams.maxh, occgeo.boundingbox.Diam()/2 );
3554 mparams.maxh = min( mparams.maxh, fullLen/fullNbSeg * (1. + mparams.grading));
3556 for (TopExp_Explorer exp(_shape, TopAbs_FACE); exp.More(); exp.Next())
3558 TopoDS_Face F = TopoDS::Face( exp.Current() );
3559 SMESH_subMesh *sm = _mesh->GetSubMesh(F);
3561 BRepGProp::SurfaceProperties(F,G);
3562 double anArea = G.Mass();
3563 tooManyElems = tooManyElems || ( anArea/hugeNb > mparams.maxh*mparams.maxh );
3565 if ( !tooManyElems )
3567 TopTools_MapOfShape edges;
3568 for (TopExp_Explorer exp1(F,TopAbs_EDGE); exp1.More(); exp1.Next())
3569 if ( edges.Add( exp1.Current() ))
3570 nb1d += Edge2NbSeg.Find(exp1.Current());
3572 int nbFaces = tooManyElems ? hugeNb : int( 4*anArea / (mparams.maxh*mparams.maxh*sqrt(3.)));
3573 int nbNodes = tooManyElems ? hugeNb : (( nbFaces*3 - (nb1d-1)*2 ) / 6 + 1 );
3575 vector<int> aVec(SMDSEntity_Last, 0);
3576 if( mparams.secondorder > 0 ) {
3577 int nb1d_in = (nbFaces*3 - nb1d) / 2;
3578 aVec[SMDSEntity_Node] = nbNodes + nb1d_in;
3579 aVec[SMDSEntity_Quad_Triangle] = nbFaces;
3582 aVec[SMDSEntity_Node] = Max ( nbNodes, 0 );
3583 aVec[SMDSEntity_Triangle] = nbFaces;
3585 aResMap[sm].swap(aVec);
3592 // pass 3D simple parameters to NETGEN
3593 const NETGENPlugin_SimpleHypothesis_3D* simple3d =
3594 dynamic_cast< const NETGENPlugin_SimpleHypothesis_3D* > ( _simpleHyp );
3596 if ( double vol = simple3d->GetMaxElementVolume() ) {
3598 mparams.maxh = pow( 72, 1/6. ) * pow( vol, 1/3. );
3599 mparams.maxh = min( mparams.maxh, occgeo.boundingbox.Diam()/2 );
3602 // using previous length from faces
3604 mparams.grading = 0.4;
3605 mparams.maxh = min( mparams.maxh, fullLen/fullNbSeg * (1. + mparams.grading));
3608 BRepGProp::VolumeProperties(_shape,G);
3609 double aVolume = G.Mass();
3610 double tetrVol = 0.1179*mparams.maxh*mparams.maxh*mparams.maxh;
3611 tooManyElems = tooManyElems || ( aVolume/hugeNb > tetrVol );
3612 int nbVols = tooManyElems ? hugeNb : int(aVolume/tetrVol);
3613 int nb1d_in = int(( nbVols*6 - fullNbSeg ) / 6 );
3614 vector<int> aVec(SMDSEntity_Last, 0 );
3615 if ( tooManyElems ) // avoid FPE
3617 aVec[SMDSEntity_Node] = hugeNb;
3618 aVec[ mparams.secondorder > 0 ? SMDSEntity_Quad_Tetra : SMDSEntity_Tetra] = hugeNb;
3622 if( mparams.secondorder > 0 ) {
3623 aVec[SMDSEntity_Node] = nb1d_in/3 + 1 + nb1d_in;
3624 aVec[SMDSEntity_Quad_Tetra] = nbVols;
3627 aVec[SMDSEntity_Node] = nb1d_in/3 + 1;
3628 aVec[SMDSEntity_Tetra] = nbVols;
3631 SMESH_subMesh *sm = _mesh->GetSubMesh(_shape);
3632 aResMap[sm].swap(aVec);
3638 double NETGENPlugin_Mesher::GetProgress(const SMESH_Algo* holder,
3639 const int * algoProgressTic,
3640 const double * algoProgress) const
3642 ((int&) _progressTic ) = *algoProgressTic + 1;
3644 if ( !_occgeom ) return 0;
3646 double progress = -1;
3649 if ( _ticTime < 0 && netgen::multithread.task[0] == 'O'/*Optimizing surface*/ )
3651 ((double&) _ticTime ) = edgeFaceMeshingTime / _totalTime / _progressTic;
3653 else if ( !_optimize /*&& _occgeom->fmap.Extent() > 1*/ )
3655 int doneShapeIndex = -1;
3656 while ( doneShapeIndex+1 < _occgeom->facemeshstatus.Size() &&
3657 _occgeom->facemeshstatus[ doneShapeIndex+1 ])
3659 if ( doneShapeIndex+1 != _curShapeIndex )
3661 ((int&) _curShapeIndex) = doneShapeIndex+1;
3662 double doneShapeRate = _curShapeIndex / double( _occgeom->fmap.Extent() );
3663 double doneTime = edgeMeshingTime + doneShapeRate * faceMeshingTime;
3664 ((double&) _ticTime) = doneTime / _totalTime / _progressTic;
3665 // cout << "shape " << _curShapeIndex << " _ticTime " << _ticTime
3666 // << " " << doneTime / _totalTime / _progressTic << endl;
3670 else if ( !_optimize && _occgeom->somap.Extent() > 1 )
3672 int curShapeIndex = _curShapeIndex;
3673 if ( _ngMesh->GetNE() > 0 )
3675 netgen::Element el = (*_ngMesh)[netgen::ElementIndex( _ngMesh->GetNE()-1 )];
3676 curShapeIndex = el.GetIndex();
3678 if ( curShapeIndex != _curShapeIndex )
3680 ((int&) _curShapeIndex) = curShapeIndex;
3681 double doneShapeRate = _curShapeIndex / double( _occgeom->somap.Extent() );
3682 double doneTime = edgeFaceMeshingTime + doneShapeRate * voluMeshingTime;
3683 ((double&) _ticTime) = doneTime / _totalTime / _progressTic;
3684 // cout << "shape " << _curShapeIndex << " _ticTime " << _ticTime
3685 // << " " << doneTime / _totalTime / _progressTic << endl;
3690 progress = Max( *algoProgressTic * _ticTime, *algoProgress );
3695 netgen::multithread.task[0] == 'D'/*elaunay meshing*/ &&
3696 progress > voluMeshingTime )
3698 progress = voluMeshingTime;
3699 ((double&) _ticTime) = voluMeshingTime / _totalTime / _progressTic;
3701 ((int&) *algoProgressTic )++;
3702 ((double&) *algoProgress) = progress;
3704 //cout << progress << " " << *algoProgressTic << " " << netgen::multithread.task << " "<< _ticTime << endl;
3706 return Min( progress, 0.99 );
3709 //================================================================================
3711 * \brief Read mesh entities preventing successful computation from "test.out" file
3713 //================================================================================
3715 SMESH_ComputeErrorPtr
3716 NETGENPlugin_Mesher::ReadErrors(const vector<const SMDS_MeshNode* >& nodeVec)
3718 if ( nodeVec.size() < 2 ) return SMESH_ComputeErrorPtr();
3719 SMESH_BadInputElements* err =
3720 new SMESH_BadInputElements( nodeVec.back()->GetMesh(), COMPERR_BAD_INPUT_MESH,
3721 "Some edges multiple times in surface mesh");
3722 SMESH_File file("test.out");
3724 vector<int> three1(3), three2(3);
3725 const char* badEdgeStr = " multiple times in surface mesh";
3726 const int badEdgeStrLen = strlen( badEdgeStr );
3727 const int nbNodes = nodeVec.size();
3729 while( !file.eof() )
3731 if ( strncmp( file, "Edge ", 5 ) == 0 &&
3732 file.getInts( two ) &&
3733 strncmp( file, badEdgeStr, badEdgeStrLen ) == 0 &&
3734 two[0] < nbNodes && two[1] < nbNodes )
3736 err->myBadElements.push_back( new SMDS_LinearEdge( nodeVec[ two[0]], nodeVec[ two[1]] ));
3737 file += badEdgeStrLen;
3739 else if ( strncmp( file, "Intersecting: ", 14 ) == 0 )
3742 // openelement 18 with open element 126
3746 const char* pos = file;
3747 bool ok = ( strncmp( file, "openelement ", 12 ) == 0 );
3748 ok = ok && file.getInts( two );
3749 ok = ok && file.getInts( three1 );
3750 ok = ok && file.getInts( three2 );
3751 for ( int i = 0; ok && i < 3; ++i )
3752 ok = ( three1[i] < nbNodes && nodeVec[ three1[i]]);
3753 for ( int i = 0; ok && i < 3; ++i )
3754 ok = ( three2[i] < nbNodes && nodeVec[ three2[i]]);
3757 err->myBadElements.push_back( new SMDS_FaceOfNodes( nodeVec[ three1[0]],
3758 nodeVec[ three1[1]],
3759 nodeVec[ three1[2]]));
3760 err->myBadElements.push_back( new SMDS_FaceOfNodes( nodeVec[ three2[0]],
3761 nodeVec[ three2[1]],
3762 nodeVec[ three2[2]]));
3763 err->myComment = "Intersecting triangles";
3777 size_t nbBadElems = err->myBadElements.size();
3778 if ( nbBadElems ) nbBadElems++; // avoid warning: variable set but not used
3781 return SMESH_ComputeErrorPtr( err );
3784 //================================================================================
3786 * \brief Write a python script creating an equivalent SALOME mesh.
3787 * This is useful to see what mesh is passed as input for the next step of mesh
3788 * generation (of mesh of higher dimension)
3790 //================================================================================
3792 void NETGENPlugin_Mesher::toPython( const netgen::Mesh* ngMesh )
3794 const char* pyFile = "/tmp/ngMesh.py";
3795 ofstream outfile( pyFile, ios::out );
3796 if ( !outfile ) return;
3798 outfile << "import salome, SMESH" << endl
3799 << "from salome.smesh import smeshBuilder" << endl
3800 << "smesh = smeshBuilder.New(salome.myStudy)" << endl
3801 << "mesh = smesh.Mesh()" << endl << endl;
3803 using namespace netgen;
3805 for (pi = PointIndex::BASE;
3806 pi < ngMesh->GetNP()+PointIndex::BASE; pi++)
3808 outfile << "mesh.AddNode( ";
3809 outfile << (*ngMesh)[pi](0) << ", ";
3810 outfile << (*ngMesh)[pi](1) << ", ";
3811 outfile << (*ngMesh)[pi](2) << ") ## "<< pi << endl;
3814 int nbDom = ngMesh->GetNDomains();
3815 for ( int i = 0; i < nbDom; ++i )
3816 outfile<< "grp" << i+1 << " = mesh.CreateEmptyGroup( SMESH.FACE, 'domain"<< i+1 << "')"<< endl;
3818 SurfaceElementIndex sei;
3819 for (sei = 0; sei < ngMesh->GetNSE(); sei++)
3821 outfile << "mesh.AddFace([ ";
3822 Element2d sel = (*ngMesh)[sei];
3823 for (int j = 0; j < sel.GetNP(); j++)
3824 outfile << sel[j] << ( j+1 < sel.GetNP() ? ", " : " ])");
3825 if ( sel.IsDeleted() ) outfile << " ## IsDeleted ";
3828 if ((*ngMesh)[sei].GetIndex())
3830 if ( int dom1 = ngMesh->GetFaceDescriptor((*ngMesh)[sei].GetIndex ()).DomainIn())
3831 outfile << "grp"<< dom1 <<".Add([ " << (int)sei+1 << " ])" << endl;
3832 if ( int dom2 = ngMesh->GetFaceDescriptor((*ngMesh)[sei].GetIndex ()).DomainOut())
3833 outfile << "grp"<< dom2 <<".Add([ " << (int)sei+1 << " ])" << endl;
3837 for (ElementIndex ei = 0; ei < ngMesh->GetNE(); ei++)
3839 Element el = (*ngMesh)[ei];
3840 outfile << "mesh.AddVolume([ ";
3841 for (int j = 0; j < el.GetNP(); j++)
3842 outfile << el[j] << ( j+1 < el.GetNP() ? ", " : " ])");
3846 for (int i = 1; i <= ngMesh->GetNSeg(); i++)
3848 const Segment & seg = ngMesh->LineSegment (i);
3849 outfile << "mesh.AddEdge([ "
3851 << seg[1] << " ])" << endl;
3853 cout << "Write " << pyFile << endl;
3856 //================================================================================
3858 * \brief Constructor of NETGENPlugin_ngMeshInfo
3860 //================================================================================
3862 NETGENPlugin_ngMeshInfo::NETGENPlugin_ngMeshInfo( netgen::Mesh* ngMesh,
3863 bool checkRemovedElems):
3864 _elementsRemoved( false ), _copyOfLocalH(0)
3868 _nbNodes = ngMesh->GetNP();
3869 _nbSegments = ngMesh->GetNSeg();
3870 _nbFaces = ngMesh->GetNSE();
3871 _nbVolumes = ngMesh->GetNE();
3873 if ( checkRemovedElems )
3874 for ( int i = 1; i <= ngMesh->GetNSE() && !_elementsRemoved; ++i )
3875 _elementsRemoved = ngMesh->SurfaceElement(i).IsDeleted();
3879 _nbNodes = _nbSegments = _nbFaces = _nbVolumes = 0;
3883 //================================================================================
3885 * \brief Copy LocalH member from one netgen mesh to another
3887 //================================================================================
3889 void NETGENPlugin_ngMeshInfo::transferLocalH( netgen::Mesh* fromMesh,
3890 netgen::Mesh* toMesh )
3892 if ( !fromMesh->LocalHFunctionGenerated() ) return;
3893 if ( !toMesh->LocalHFunctionGenerated() )
3895 toMesh->CalcLocalH(netgen::mparam.grading);
3897 toMesh->CalcLocalH();
3900 const size_t size = sizeof( netgen::LocalH );
3901 _copyOfLocalH = new char[ size ];
3902 memcpy( (void*)_copyOfLocalH, (void*)&toMesh->LocalHFunction(), size );
3903 memcpy( (void*)&toMesh->LocalHFunction(), (void*)&fromMesh->LocalHFunction(), size );
3906 //================================================================================
3908 * \brief Restore LocalH member of a netgen mesh
3910 //================================================================================
3912 void NETGENPlugin_ngMeshInfo::restoreLocalH( netgen::Mesh* toMesh )
3914 if ( _copyOfLocalH )
3916 const size_t size = sizeof( netgen::LocalH );
3917 memcpy( (void*)&toMesh->LocalHFunction(), (void*)_copyOfLocalH, size );
3918 delete [] _copyOfLocalH;
3923 //================================================================================
3925 * \brief Find "internal" sub-shapes
3927 //================================================================================
3929 NETGENPlugin_Internals::NETGENPlugin_Internals( SMESH_Mesh& mesh,
3930 const TopoDS_Shape& shape,
3932 : _mesh( mesh ), _is3D( is3D )
3934 SMESHDS_Mesh* meshDS = mesh.GetMeshDS();
3936 TopExp_Explorer f,e;
3937 for ( f.Init( shape, TopAbs_FACE ); f.More(); f.Next() )
3939 int faceID = meshDS->ShapeToIndex( f.Current() );
3941 // find not computed internal edges
3943 for ( e.Init( f.Current().Oriented(TopAbs_FORWARD), TopAbs_EDGE ); e.More(); e.Next() )
3944 if ( e.Current().Orientation() == TopAbs_INTERNAL )
3946 SMESH_subMesh* eSM = mesh.GetSubMesh( e.Current() );
3947 if ( eSM->IsEmpty() )
3949 _e2face.insert( make_pair( eSM->GetId(), faceID ));
3950 for ( TopoDS_Iterator v(e.Current()); v.More(); v.Next() )
3951 _e2face.insert( make_pair( meshDS->ShapeToIndex( v.Value() ), faceID ));
3955 // find internal vertices in a face
3956 set<int> intVV; // issue 0020850 where same vertex is twice in a face
3957 for ( TopoDS_Iterator fSub( f.Current() ); fSub.More(); fSub.Next())
3958 if ( fSub.Value().ShapeType() == TopAbs_VERTEX )
3960 int vID = meshDS->ShapeToIndex( fSub.Value() );
3961 if ( intVV.insert( vID ).second )
3962 _f2v[ faceID ].push_back( vID );
3967 // find internal faces and their subshapes where nodes are to be doubled
3968 // to make a crack with non-sewed borders
3970 if ( f.Current().Orientation() == TopAbs_INTERNAL )
3972 _intShapes.insert( meshDS->ShapeToIndex( f.Current() ));
3975 list< TopoDS_Shape > edges;
3976 for ( e.Init( f.Current(), TopAbs_EDGE ); e.More(); e.Next())
3977 if ( SMESH_MesherHelper::NbAncestors( e.Current(), mesh, TopAbs_FACE ) > 1 )
3979 _intShapes.insert( meshDS->ShapeToIndex( e.Current() ));
3980 edges.push_back( e.Current() );
3981 // find border faces
3982 PShapeIteratorPtr fIt =
3983 SMESH_MesherHelper::GetAncestors( edges.back(),mesh,TopAbs_FACE );
3984 while ( const TopoDS_Shape* pFace = fIt->next() )
3985 if ( !pFace->IsSame( f.Current() ))
3986 _borderFaces.insert( meshDS->ShapeToIndex( *pFace ));
3989 // we consider vertex internal if it is shared by more than one internal edge
3990 list< TopoDS_Shape >::iterator edge = edges.begin();
3991 for ( ; edge != edges.end(); ++edge )
3992 for ( TopoDS_Iterator v( *edge ); v.More(); v.Next() )
3994 set<int> internalEdges;
3995 PShapeIteratorPtr eIt =
3996 SMESH_MesherHelper::GetAncestors( v.Value(),mesh,TopAbs_EDGE );
3997 while ( const TopoDS_Shape* pEdge = eIt->next() )
3999 int edgeID = meshDS->ShapeToIndex( *pEdge );
4000 if ( isInternalShape( edgeID ))
4001 internalEdges.insert( edgeID );
4003 if ( internalEdges.size() > 1 )
4004 _intShapes.insert( meshDS->ShapeToIndex( v.Value() ));
4008 } // loop on geom faces
4010 // find vertices internal in solids
4013 for ( TopExp_Explorer so(shape, TopAbs_SOLID); so.More(); so.Next())
4015 int soID = meshDS->ShapeToIndex( so.Current() );
4016 for ( TopoDS_Iterator soSub( so.Current() ); soSub.More(); soSub.Next())
4017 if ( soSub.Value().ShapeType() == TopAbs_VERTEX )
4018 _s2v[ soID ].push_back( meshDS->ShapeToIndex( soSub.Value() ));
4023 //================================================================================
4025 * \brief Find mesh faces on non-internal geom faces sharing internal edge
4026 * some nodes of which are to be doubled to make the second border of the "crack"
4028 //================================================================================
4030 void NETGENPlugin_Internals::findBorderElements( TIDSortedElemSet & borderElems )
4032 if ( _intShapes.empty() ) return;
4034 SMESH_Mesh& mesh = const_cast<SMESH_Mesh&>(_mesh);
4035 SMESHDS_Mesh* meshDS = mesh.GetMeshDS();
4037 // loop on internal geom edges
4038 set<int>::const_iterator intShapeId = _intShapes.begin();
4039 for ( ; intShapeId != _intShapes.end(); ++intShapeId )
4041 const TopoDS_Shape& s = meshDS->IndexToShape( *intShapeId );
4042 if ( s.ShapeType() != TopAbs_EDGE ) continue;
4044 // get internal and non-internal geom faces sharing the internal edge <s>
4046 set<int>::iterator bordFace = _borderFaces.end();
4047 PShapeIteratorPtr faces = SMESH_MesherHelper::GetAncestors( s, _mesh, TopAbs_FACE );
4048 while ( const TopoDS_Shape* pFace = faces->next() )
4050 int faceID = meshDS->ShapeToIndex( *pFace );
4051 if ( isInternalShape( faceID ))
4054 bordFace = _borderFaces.insert( faceID ).first;
4056 if ( bordFace == _borderFaces.end() || !intFace ) continue;
4058 // get all links of mesh faces on internal geom face sharing nodes on edge <s>
4059 set< SMESH_OrientedLink > links; //!< links of faces on internal geom face
4060 list<const SMDS_MeshElement*> suspectFaces[2]; //!< mesh faces on border geom faces
4061 int nbSuspectFaces = 0;
4062 SMESHDS_SubMesh* intFaceSM = meshDS->MeshElements( intFace );
4063 if ( !intFaceSM || intFaceSM->NbElements() == 0 ) continue;
4064 SMESH_subMeshIteratorPtr smIt = mesh.GetSubMesh( s )->getDependsOnIterator(true,true);
4065 while ( smIt->more() )
4067 SMESHDS_SubMesh* sm = smIt->next()->GetSubMeshDS();
4068 if ( !sm ) continue;
4069 SMDS_NodeIteratorPtr nIt = sm->GetNodes();
4070 while ( nIt->more() )
4072 const SMDS_MeshNode* nOnEdge = nIt->next();
4073 SMDS_ElemIteratorPtr fIt = nOnEdge->GetInverseElementIterator(SMDSAbs_Face);
4074 while ( fIt->more() )
4076 const SMDS_MeshElement* f = fIt->next();
4077 const int nbNodes = f->NbCornerNodes();
4078 if ( intFaceSM->Contains( f ))
4080 for ( int i = 0; i < nbNodes; ++i )
4081 links.insert( SMESH_OrientedLink( f->GetNode(i), f->GetNode((i+1)%nbNodes)));
4086 for ( int i = 0; i < nbNodes; ++i )
4087 nbDblNodes += isInternalShape( f->GetNode(i)->getshapeId() );
4089 suspectFaces[ nbDblNodes < 2 ].push_back( f );
4095 // suspectFaces[0] having link with same orientation as mesh faces on
4096 // the internal geom face are <borderElems>. suspectFaces[1] have
4097 // only one node on edge <s>, we decide on them later (at the 2nd loop)
4098 // by links of <borderElems> found at the 1st and 2nd loops
4099 set< SMESH_OrientedLink > borderLinks;
4100 for ( int isPostponed = 0; isPostponed < 2; ++isPostponed )
4102 list<const SMDS_MeshElement*>::iterator fIt = suspectFaces[isPostponed].begin();
4103 for ( int nbF = 0; fIt != suspectFaces[isPostponed].end(); ++fIt, ++nbF )
4105 const SMDS_MeshElement* f = *fIt;
4106 bool isBorder = false, linkFound = false, borderLinkFound = false;
4107 list< SMESH_OrientedLink > faceLinks;
4108 int nbNodes = f->NbCornerNodes();
4109 for ( int i = 0; i < nbNodes; ++i )
4111 SMESH_OrientedLink link( f->GetNode(i), f->GetNode((i+1)%nbNodes));
4112 faceLinks.push_back( link );
4115 set< SMESH_OrientedLink >::iterator foundLink = links.find( link );
4116 if ( foundLink != links.end() )
4119 isBorder = ( foundLink->_reversed == link._reversed );
4120 if ( !isBorder && !isPostponed ) break;
4121 faceLinks.pop_back();
4123 else if ( isPostponed && !borderLinkFound )
4125 foundLink = borderLinks.find( link );
4126 if ( foundLink != borderLinks.end() )
4128 borderLinkFound = true;
4129 isBorder = ( foundLink->_reversed != link._reversed );
4136 borderElems.insert( f );
4137 borderLinks.insert( faceLinks.begin(), faceLinks.end() );
4139 else if ( !linkFound && !borderLinkFound )
4141 suspectFaces[1].push_back( f );
4142 if ( nbF > 2 * nbSuspectFaces )
4143 break; // dead loop protection
4150 //================================================================================
4152 * \brief put internal shapes in maps and fill in submeshes to precompute
4154 //================================================================================
4156 void NETGENPlugin_Internals::getInternalEdges( TopTools_IndexedMapOfShape& fmap,
4157 TopTools_IndexedMapOfShape& emap,
4158 TopTools_IndexedMapOfShape& vmap,
4159 list< SMESH_subMesh* > smToPrecompute[])
4161 if ( !hasInternalEdges() ) return;
4162 map<int,int>::const_iterator ev_face = _e2face.begin();
4163 for ( ; ev_face != _e2face.end(); ++ev_face )
4165 const TopoDS_Shape& ev = _mesh.GetMeshDS()->IndexToShape( ev_face->first );
4166 const TopoDS_Shape& face = _mesh.GetMeshDS()->IndexToShape( ev_face->second );
4168 ( ev.ShapeType() == TopAbs_EDGE ? emap : vmap ).Add( ev );
4170 //cout<<"INTERNAL EDGE or VERTEX "<<ev_face->first<<" on face "<<ev_face->second<<endl;
4172 smToPrecompute[ MeshDim_1D ].push_back( _mesh.GetSubMeshContaining( ev_face->first ));
4176 //================================================================================
4178 * \brief return shapes and submeshes to be meshed and already meshed boundary submeshes
4180 //================================================================================
4182 void NETGENPlugin_Internals::getInternalFaces( TopTools_IndexedMapOfShape& fmap,
4183 TopTools_IndexedMapOfShape& emap,
4184 list< SMESH_subMesh* >& intFaceSM,
4185 list< SMESH_subMesh* >& boundarySM)
4187 if ( !hasInternalFaces() ) return;
4189 // <fmap> and <emap> are for not yet meshed shapes
4190 // <intFaceSM> is for submeshes of faces
4191 // <boundarySM> is for meshed edges and vertices
4196 set<int> shapeIDs ( _intShapes );
4197 if ( !_borderFaces.empty() )
4198 shapeIDs.insert( _borderFaces.begin(), _borderFaces.end() );
4200 set<int>::const_iterator intS = shapeIDs.begin();
4201 for ( ; intS != shapeIDs.end(); ++intS )
4203 SMESH_subMesh* sm = _mesh.GetSubMeshContaining( *intS );
4205 if ( sm->GetSubShape().ShapeType() != TopAbs_FACE ) continue;
4207 intFaceSM.push_back( sm );
4209 // add submeshes of not computed internal faces
4210 if ( !sm->IsEmpty() ) continue;
4212 SMESH_subMeshIteratorPtr smIt = sm->getDependsOnIterator(true,true);
4213 while ( smIt->more() )
4216 const TopoDS_Shape& s = sm->GetSubShape();
4218 if ( sm->IsEmpty() )
4221 switch ( s.ShapeType() ) {
4222 case TopAbs_FACE: fmap.Add ( s ); break;
4223 case TopAbs_EDGE: emap.Add ( s ); break;
4229 if ( s.ShapeType() != TopAbs_FACE )
4230 boundarySM.push_back( sm );
4236 //================================================================================
4238 * \brief Return true if given shape is to be precomputed in order to be correctly
4239 * added to netgen mesh
4241 //================================================================================
4243 bool NETGENPlugin_Internals::isShapeToPrecompute(const TopoDS_Shape& s)
4245 int shapeID = _mesh.GetMeshDS()->ShapeToIndex( s );
4246 switch ( s.ShapeType() ) {
4247 case TopAbs_FACE : break; //return isInternalShape( shapeID ) || isBorderFace( shapeID );
4248 case TopAbs_EDGE : return isInternalEdge( shapeID );
4249 case TopAbs_VERTEX: break;
4255 //================================================================================
4257 * \brief Return SMESH
4259 //================================================================================
4261 SMESH_Mesh& NETGENPlugin_Internals::getMesh() const
4263 return const_cast<SMESH_Mesh&>( _mesh );
4266 //================================================================================
4268 * \brief Access to a counter of NETGENPlugin_NetgenLibWrapper instances
4270 //================================================================================
4272 int& NETGENPlugin_NetgenLibWrapper::instanceCounter()
4274 static int theCouner = 0;
4278 //================================================================================
4280 * \brief Initialize netgen library
4282 //================================================================================
4284 NETGENPlugin_NetgenLibWrapper::NETGENPlugin_NetgenLibWrapper()
4286 if ( instanceCounter() == 0 )
4289 ++instanceCounter();
4291 _isComputeOk = false;
4295 if ( !getenv( "KEEP_NETGEN_OUTPUT" ))
4297 // redirect all netgen output (mycout,myerr,cout) to _outputFileName
4298 _outputFileName = getOutputFileName();
4299 _ngcout = netgen::mycout;
4300 _ngcerr = netgen::myerr;
4301 netgen::mycout = new ofstream ( _outputFileName.c_str() );
4302 netgen::myerr = netgen::mycout;
4303 _coutBuffer = std::cout.rdbuf();
4305 cout << "NOTE: netgen output is redirected to file " << _outputFileName << endl;
4307 std::cout.rdbuf( netgen::mycout->rdbuf() );
4311 _ngMesh = Ng_NewMesh();
4314 //================================================================================
4316 * \brief Finish using netgen library
4318 //================================================================================
4320 NETGENPlugin_NetgenLibWrapper::~NETGENPlugin_NetgenLibWrapper()
4322 --instanceCounter();
4324 Ng_DeleteMesh( _ngMesh );
4328 std::cout.rdbuf( _coutBuffer );
4335 //================================================================================
4337 * \brief Set netgen mesh to delete at destruction
4339 //================================================================================
4341 void NETGENPlugin_NetgenLibWrapper::setMesh( Ng_Mesh* mesh )
4344 Ng_DeleteMesh( _ngMesh );
4348 //================================================================================
4350 * \brief Return a unique file name
4352 //================================================================================
4354 std::string NETGENPlugin_NetgenLibWrapper::getOutputFileName()
4356 std::string aTmpDir = SALOMEDS_Tool::GetTmpDir();
4358 TCollection_AsciiString aGenericName = (char*)aTmpDir.c_str();
4359 aGenericName += "NETGEN_";
4361 aGenericName += getpid();
4363 aGenericName += _getpid();
4365 aGenericName += "_";
4366 aGenericName += Abs((Standard_Integer)(long) aGenericName.ToCString());
4367 aGenericName += ".out";
4369 return aGenericName.ToCString();
4372 //================================================================================
4374 * \brief Remove "test.out" and "problemfaces" files in current directory
4376 //================================================================================
4378 void NETGENPlugin_NetgenLibWrapper::RemoveTmpFiles()
4380 bool rm = SMESH_File("test.out").remove() ;
4382 if ( rm && netgen::testout && instanceCounter() == 0 )
4384 delete netgen::testout;
4385 netgen::testout = 0;
4388 SMESH_File("problemfaces").remove();
4389 SMESH_File("occmesh.rep").remove();
4392 //================================================================================
4394 * \brief Remove file with netgen output
4396 //================================================================================
4398 void NETGENPlugin_NetgenLibWrapper::removeOutputFile()
4400 if ( !_outputFileName.empty() )
4404 delete netgen::mycout;
4405 netgen::mycout = _ngcout;
4406 netgen::myerr = _ngcerr;
4409 string tmpDir = SALOMEDS_Tool::GetDirFromPath ( _outputFileName );
4410 string aFileName = SALOMEDS_Tool::GetNameFromPath( _outputFileName ) + ".out";
4411 SALOMEDS::ListOfFileNames_var aFiles = new SALOMEDS::ListOfFileNames;
4413 aFiles[0] = aFileName.c_str();
4415 SALOMEDS_Tool::RemoveTemporaryFiles( tmpDir.c_str(), aFiles.in(), true );