1 // Copyright (C) 2007-2019 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);
94 NETGENPLUGIN_DLL_HEADER
95 extern MeshingParameters mparam;
97 NETGENPLUGIN_DLL_HEADER
98 extern volatile multithreadt multithread;
100 NETGENPLUGIN_DLL_HEADER
101 extern bool merge_solids;
103 // values used for occgeo.facemeshstatus
104 enum EFaceMeshStatus { FACE_NOT_TREATED = 0,
116 using namespace nglib;
120 #define nodeVec_ACCESS(index) ((SMDS_MeshNode*) nodeVec.at((index)))
122 #define nodeVec_ACCESS(index) ((SMDS_MeshNode*) nodeVec[index])
125 #define NGPOINT_COORDS(p) p(0),p(1),p(2)
128 // dump elements added to ng mesh
129 //#define DUMP_SEGMENTS
130 //#define DUMP_TRIANGLES
131 //#define DUMP_TRIANGLES_SCRIPT "/tmp/trias.py" //!< debug AddIntVerticesInSolids()
134 TopTools_IndexedMapOfShape ShapesWithLocalSize;
135 std::map<int,double> VertexId2LocalSize;
136 std::map<int,double> EdgeId2LocalSize;
137 std::map<int,double> FaceId2LocalSize;
138 std::map<int,double> SolidId2LocalSize;
140 std::vector<SMESHUtils::ControlPnt> ControlPoints;
141 std::set<int> ShapesWithControlPoints; // <-- allows calling SetLocalSize() several times w/o recomputing ControlPoints
143 //=============================================================================
147 //=============================================================================
149 NETGENPlugin_Mesher::NETGENPlugin_Mesher (SMESH_Mesh* mesh,
150 const TopoDS_Shape& aShape,
156 _fineness(NETGENPlugin_Hypothesis::GetDefaultFineness()),
157 _isViscousLayers2D(false),
158 _chordalError(-1), // means disabled
165 _viscousLayersHyp(NULL),
168 SetDefaultParameters();
169 ShapesWithLocalSize.Clear();
170 VertexId2LocalSize.clear();
171 EdgeId2LocalSize.clear();
172 FaceId2LocalSize.clear();
173 SolidId2LocalSize.clear();
174 ControlPoints.clear();
175 ShapesWithControlPoints.clear();
178 //================================================================================
182 //================================================================================
184 NETGENPlugin_Mesher::~NETGENPlugin_Mesher()
192 //================================================================================
194 * Set pointer to NETGENPlugin_Mesher* field of the holder, that will be
195 * nullified at destruction of this
197 //================================================================================
199 void NETGENPlugin_Mesher::SetSelfPointer( NETGENPlugin_Mesher ** ptr )
210 //================================================================================
212 * \brief Initialize global NETGEN parameters with default values
214 //================================================================================
216 void NETGENPlugin_Mesher::SetDefaultParameters()
218 netgen::MeshingParameters& mparams = netgen::mparam;
219 mparams = netgen::MeshingParameters();
220 // maximal mesh edge size
221 mparams.maxh = 0;//NETGENPlugin_Hypothesis::GetDefaultMaxSize();
223 // minimal number of segments per edge
224 mparams.segmentsperedge = NETGENPlugin_Hypothesis::GetDefaultNbSegPerEdge();
225 // rate of growth of size between elements
226 mparams.grading = NETGENPlugin_Hypothesis::GetDefaultGrowthRate();
227 // safety factor for curvatures (elements per radius)
228 mparams.curvaturesafety = NETGENPlugin_Hypothesis::GetDefaultNbSegPerRadius();
229 // create elements of second order
230 mparams.secondorder = NETGENPlugin_Hypothesis::GetDefaultSecondOrder();
231 // quad-dominated surface meshing
235 mparams.quad = NETGENPlugin_Hypothesis_2D::GetDefaultQuadAllowed();
236 _fineness = NETGENPlugin_Hypothesis::GetDefaultFineness();
237 mparams.uselocalh = NETGENPlugin_Hypothesis::GetDefaultSurfaceCurvature();
238 netgen::merge_solids = NETGENPlugin_Hypothesis::GetDefaultFuseEdges();
241 //=============================================================================
245 //=============================================================================
247 void SetLocalSize(TopoDS_Shape GeomShape, double LocalSize)
249 if ( GeomShape.IsNull() ) return;
250 TopAbs_ShapeEnum GeomType = GeomShape.ShapeType();
251 if (GeomType == TopAbs_COMPOUND) {
252 for (TopoDS_Iterator it (GeomShape); it.More(); it.Next()) {
253 SetLocalSize(it.Value(), LocalSize);
258 if (! ShapesWithLocalSize.Contains(GeomShape))
259 key = ShapesWithLocalSize.Add(GeomShape);
261 key = ShapesWithLocalSize.FindIndex(GeomShape);
262 if (GeomType == TopAbs_VERTEX) {
263 VertexId2LocalSize[key] = LocalSize;
264 } else if (GeomType == TopAbs_EDGE) {
265 EdgeId2LocalSize[key] = LocalSize;
266 } else if (GeomType == TopAbs_FACE) {
267 FaceId2LocalSize[key] = LocalSize;
268 } else if (GeomType == TopAbs_SOLID) {
269 SolidId2LocalSize[key] = LocalSize;
273 //=============================================================================
275 * Pass parameters to NETGEN
277 //=============================================================================
278 void NETGENPlugin_Mesher::SetParameters(const NETGENPlugin_Hypothesis* hyp)
282 netgen::MeshingParameters& mparams = netgen::mparam;
283 // Initialize global NETGEN parameters:
284 // maximal mesh segment size
285 mparams.maxh = hyp->GetMaxSize();
286 // maximal mesh element linear size
287 mparams.minh = hyp->GetMinSize();
288 // minimal number of segments per edge
289 mparams.segmentsperedge = hyp->GetNbSegPerEdge();
290 // rate of growth of size between elements
291 mparams.grading = hyp->GetGrowthRate();
292 // safety factor for curvatures (elements per radius)
293 mparams.curvaturesafety = hyp->GetNbSegPerRadius();
294 // create elements of second order
295 mparams.secondorder = hyp->GetSecondOrder() ? 1 : 0;
296 // quad-dominated surface meshing
297 mparams.quad = hyp->GetQuadAllowed() ? 1 : 0;
298 _optimize = hyp->GetOptimize();
299 _fineness = hyp->GetFineness();
300 mparams.uselocalh = hyp->GetSurfaceCurvature();
301 netgen::merge_solids = hyp->GetFuseEdges();
302 _chordalError = hyp->GetChordalErrorEnabled() ? hyp->GetChordalError() : -1.;
303 mparams.optsteps2d = _optimize ? hyp->GetNbSurfOptSteps() : 0;
304 mparams.optsteps3d = _optimize ? hyp->GetNbVolOptSteps() : 0;
305 mparams.elsizeweight = hyp->GetElemSizeWeight();
306 mparams.opterrpow = hyp->GetWorstElemMeasure();
307 mparams.delaunay = hyp->GetUseDelauney();
308 mparams.checkoverlap = hyp->GetCheckOverlapping();
309 mparams.checkchartboundary = hyp->GetCheckChartBoundary();
312 mparams.meshsizefilename= hyp->GetMeshSizeFile().empty() ? 0 : hyp->GetMeshSizeFile().c_str();
314 const NETGENPlugin_Hypothesis::TLocalSize& localSizes = hyp->GetLocalSizesAndEntries();
315 if ( !localSizes.empty() )
317 SMESH_Gen_i* smeshGen_i = SMESH_Gen_i::GetSMESHGen();
318 NETGENPlugin_Hypothesis::TLocalSize::const_iterator it = localSizes.begin();
319 for ( ; it != localSizes.end() ; it++)
321 std::string entry = (*it).first;
322 double val = (*it).second;
324 GEOM::GEOM_Object_var aGeomObj;
325 SALOMEDS::SObject_var aSObj = SMESH_Gen_i::getStudyServant()->FindObjectID( entry.c_str() );
326 if ( !aSObj->_is_nil() ) {
327 CORBA::Object_var obj = aSObj->GetObject();
328 aGeomObj = GEOM::GEOM_Object::_narrow(obj);
331 TopoDS_Shape S = smeshGen_i->GeomObjectToShape( aGeomObj.in() );
332 ::SetLocalSize(S, val);
338 //=============================================================================
340 * Pass simple parameters to NETGEN
342 //=============================================================================
344 void NETGENPlugin_Mesher::SetParameters(const NETGENPlugin_SimpleHypothesis_2D* hyp)
348 SetDefaultParameters();
351 //================================================================================
353 * \brief Store a Viscous Layers hypothesis
355 //================================================================================
357 void NETGENPlugin_Mesher::SetParameters(const StdMeshers_ViscousLayers* hyp )
359 _viscousLayersHyp = hyp;
362 //=============================================================================
364 * Link - a pair of integer numbers
366 //=============================================================================
370 Link(int _n1, int _n2) : n1(_n1), n2(_n2) {}
371 Link() : n1(0), n2(0) {}
372 bool Contains( int n ) const { return n == n1 || n == n2; }
373 bool IsConnected( const Link& other ) const
375 return (( Contains( other.n1 ) || Contains( other.n2 )) && ( this != &other ));
379 int HashCode(const Link& aLink, int aLimit)
381 return HashCode(aLink.n1 + aLink.n2, aLimit);
384 Standard_Boolean IsEqual(const Link& aLink1, const Link& aLink2)
386 return (( aLink1.n1 == aLink2.n1 && aLink1.n2 == aLink2.n2 ) ||
387 ( aLink1.n1 == aLink2.n2 && aLink1.n2 == aLink2.n1 ));
392 //================================================================================
394 * \brief return id of netgen point corresponding to SMDS node
396 //================================================================================
397 typedef map< const SMDS_MeshNode*, int > TNode2IdMap;
399 int ngNodeId( const SMDS_MeshNode* node,
400 netgen::Mesh& ngMesh,
401 TNode2IdMap& nodeNgIdMap)
403 int newNgId = ngMesh.GetNP() + 1;
405 TNode2IdMap::iterator node_id = nodeNgIdMap.insert( make_pair( node, newNgId )).first;
407 if ( node_id->second == newNgId)
409 #if defined(DUMP_SEGMENTS) || defined(DUMP_TRIANGLES)
410 cout << "Ng " << newNgId << " - " << node;
412 netgen::MeshPoint p( netgen::Point<3> (node->X(), node->Y(), node->Z()) );
413 ngMesh.AddPoint( p );
415 return node_id->second;
418 //================================================================================
420 * \brief Return computed EDGEs connected to the given one
422 //================================================================================
424 list< TopoDS_Edge > getConnectedEdges( const TopoDS_Edge& edge,
425 const TopoDS_Face& face,
426 const set< SMESH_subMesh* > & computedSM,
427 const SMESH_MesherHelper& helper,
428 map< SMESH_subMesh*, set< int > >& addedEdgeSM2Faces)
431 list< TopoDS_Edge > edges;
432 list< int > nbEdgesInWire;
433 /*int nbWires =*/ SMESH_Block::GetOrderedEdges( face, edges, nbEdgesInWire);
435 // find <edge> within <edges>
436 list< TopoDS_Edge >::iterator eItFwd = edges.begin();
437 for ( ; eItFwd != edges.end(); ++eItFwd )
438 if ( edge.IsSame( *eItFwd ))
440 if ( eItFwd == edges.end()) return list< TopoDS_Edge>();
442 if ( eItFwd->Orientation() >= TopAbs_INTERNAL )
444 // connected INTERNAL edges returned from GetOrderedEdges() are wrongly oriented
445 // so treat each INTERNAL edge separately
446 TopoDS_Edge e = *eItFwd;
448 edges.push_back( e );
452 // get all computed EDGEs connected to <edge>
454 list< TopoDS_Edge >::iterator eItBack = eItFwd, ePrev;
455 TopoDS_Vertex vCommon;
456 TopTools_MapOfShape eAdded; // map used not to add a seam edge twice to <edges>
459 // put edges before <edge> to <edges> back
460 while ( edges.begin() != eItFwd )
461 edges.splice( edges.end(), edges, edges.begin() );
465 while ( ++eItFwd != edges.end() )
467 SMESH_subMesh* sm = helper.GetMesh()->GetSubMesh( *eItFwd );
469 bool connected = TopExp::CommonVertex( *ePrev, *eItFwd, vCommon );
470 bool computed = sm->IsMeshComputed();
471 bool added = addedEdgeSM2Faces[ sm ].count( helper.GetSubShapeID() );
472 bool doubled = !eAdded.Add( *eItFwd );
473 bool orientOK = (( ePrev ->Orientation() < TopAbs_INTERNAL ) ==
474 ( eItFwd->Orientation() < TopAbs_INTERNAL ) );
475 if ( !connected || !computed || !orientOK || added || doubled )
477 // stop advancement; move edges from tail to head
478 while ( edges.back() != *ePrev )
479 edges.splice( edges.begin(), edges, --edges.end() );
485 while ( eItBack != edges.begin() )
489 SMESH_subMesh* sm = helper.GetMesh()->GetSubMesh( *eItBack );
491 bool connected = TopExp::CommonVertex( *ePrev, *eItBack, vCommon );
492 bool computed = sm->IsMeshComputed();
493 bool added = addedEdgeSM2Faces[ sm ].count( helper.GetSubShapeID() );
494 bool doubled = !eAdded.Add( *eItBack );
495 bool orientOK = (( ePrev ->Orientation() < TopAbs_INTERNAL ) ==
496 ( eItBack->Orientation() < TopAbs_INTERNAL ) );
497 if ( !connected || !computed || !orientOK || added || doubled)
500 edges.erase( edges.begin(), ePrev );
504 if ( edges.front() != edges.back() )
506 // assure that the 1st vertex is meshed
507 TopoDS_Edge eLast = edges.back();
508 while ( !SMESH_Algo::VertexNode( SMESH_MesherHelper::IthVertex( 0, edges.front()), helper.GetMeshDS())
510 edges.front() != eLast )
511 edges.splice( edges.end(), edges, edges.begin() );
516 //================================================================================
518 * \brief Make triangulation of a shape precise enough
520 //================================================================================
522 void updateTriangulation( const TopoDS_Shape& shape )
524 // static set< Poly_Triangulation* > updated;
526 // TopLoc_Location loc;
527 // TopExp_Explorer fExp( shape, TopAbs_FACE );
528 // for ( ; fExp.More(); fExp.Next() )
530 // Handle(Poly_Triangulation) triangulation =
531 // BRep_Tool::Triangulation ( TopoDS::Face( fExp.Current() ), loc);
532 // if ( triangulation.IsNull() ||
533 // updated.insert( triangulation.operator->() ).second )
535 // BRepTools::Clean (shape);
538 BRepMesh_IncrementalMesh e(shape, 0.01, true);
540 catch (Standard_Failure)
543 // updated.erase( triangulation.operator->() );
544 // triangulation = BRep_Tool::Triangulation ( TopoDS::Face( fExp.Current() ), loc);
545 // updated.insert( triangulation.operator->() );
549 //================================================================================
551 * \brief Returns a medium node either existing in SMESH of created by NETGEN
552 * \param [in] corner1 - corner node 1
553 * \param [in] corner2 - corner node 2
554 * \param [in] defaultMedium - the node created by NETGEN
555 * \param [in] helper - holder of medium nodes existing in SMESH
556 * \return const SMDS_MeshNode* - the result node
558 //================================================================================
560 const SMDS_MeshNode* mediumNode( const SMDS_MeshNode* corner1,
561 const SMDS_MeshNode* corner2,
562 const SMDS_MeshNode* defaultMedium,
563 const SMESH_MesherHelper* helper)
567 TLinkNodeMap::const_iterator l2n =
568 helper->GetTLinkNodeMap().find( SMESH_TLink( corner1, corner2 ));
569 if ( l2n != helper->GetTLinkNodeMap().end() )
570 defaultMedium = l2n->second;
572 return defaultMedium;
575 //================================================================================
577 * \brief Assure that mesh on given shapes is quadratic
579 //================================================================================
581 // void makeQuadratic( const TopTools_IndexedMapOfShape& shapes,
582 // SMESH_Mesh* mesh )
584 // for ( int i = 1; i <= shapes.Extent(); ++i )
586 // SMESHDS_SubMesh* smDS = mesh->GetMeshDS()->MeshElements( shapes(i) );
587 // if ( !smDS ) continue;
588 // SMDS_ElemIteratorPtr elemIt = smDS->GetElements();
589 // if ( !elemIt->more() ) continue;
590 // const SMDS_MeshElement* e = elemIt->next();
591 // if ( !e || e->IsQuadratic() )
594 // TIDSortedElemSet elems;
595 // elems.insert( e );
596 // while ( elemIt->more() )
597 // elems.insert( elems.end(), elemIt->next() );
599 // SMESH_MeshEditor( mesh ).ConvertToQuadratic( /*3d=*/false, elems, /*biQuad=*/false );
603 //================================================================================
605 * \brief Restrict size of elements on the given edge
607 //================================================================================
609 void setLocalSize(const TopoDS_Edge& edge,
612 const bool overrideMinH = true)
614 if ( size <= std::numeric_limits<double>::min() )
616 Standard_Real u1, u2;
617 Handle(Geom_Curve) curve = BRep_Tool::Curve(edge, u1, u2);
618 if ( curve.IsNull() )
620 TopoDS_Iterator vIt( edge );
621 if ( !vIt.More() ) return;
622 gp_Pnt p = BRep_Tool::Pnt( TopoDS::Vertex( vIt.Value() ));
623 NETGENPlugin_Mesher::RestrictLocalSize( mesh, p.XYZ(), size, overrideMinH );
627 const int nb = (int)( 1.5 * SMESH_Algo::EdgeLength( edge ) / size );
628 Standard_Real delta = (u2-u1)/nb;
629 for(int i=0; i<nb; i++)
631 Standard_Real u = u1 + delta*i;
632 gp_Pnt p = curve->Value(u);
633 NETGENPlugin_Mesher::RestrictLocalSize( mesh, p.XYZ(), size, overrideMinH );
634 netgen::Point3d pi(p.X(), p.Y(), p.Z());
635 double resultSize = mesh.GetH(pi);
636 if ( resultSize - size > 0.1*size )
637 // netgen does restriction iff oldH/newH > 1.2 (localh.cpp:136)
638 NETGENPlugin_Mesher::RestrictLocalSize( mesh, p.XYZ(), resultSize/1.201, overrideMinH );
643 //================================================================================
645 * \brief Return triangle size for a given chordalError and radius of curvature
647 //================================================================================
649 double elemSizeForChordalError( double chordalError, double radius )
651 if ( 2 * radius < chordalError )
653 return Sqrt( 3 ) * Sqrt( chordalError * ( 2 * radius - chordalError ));
658 //================================================================================
660 * \brief Set local size on shapes defined by SetParameters()
662 //================================================================================
664 void NETGENPlugin_Mesher::SetLocalSize( netgen::OCCGeometry& occgeo,
665 netgen::Mesh& ngMesh)
668 std::map<int,double>::const_iterator it;
669 for( it=EdgeId2LocalSize.begin(); it!=EdgeId2LocalSize.end(); it++)
671 int key = (*it).first;
672 double hi = (*it).second;
673 const TopoDS_Shape& shape = ShapesWithLocalSize.FindKey(key);
674 setLocalSize( TopoDS::Edge(shape), hi, ngMesh );
677 for(it=VertexId2LocalSize.begin(); it!=VertexId2LocalSize.end(); it++)
679 int key = (*it).first;
680 double hi = (*it).second;
681 const TopoDS_Shape& shape = ShapesWithLocalSize.FindKey(key);
682 gp_Pnt p = BRep_Tool::Pnt( TopoDS::Vertex(shape) );
683 NETGENPlugin_Mesher::RestrictLocalSize( ngMesh, p.XYZ(), hi );
686 for(it=FaceId2LocalSize.begin(); it!=FaceId2LocalSize.end(); it++)
688 int key = (*it).first;
689 double val = (*it).second;
690 const TopoDS_Shape& shape = ShapesWithLocalSize.FindKey(key);
691 int faceNgID = occgeo.fmap.FindIndex(shape);
694 occgeo.SetFaceMaxH(faceNgID, val);
695 for ( TopExp_Explorer edgeExp( shape, TopAbs_EDGE ); edgeExp.More(); edgeExp.Next() )
696 setLocalSize( TopoDS::Edge( edgeExp.Current() ), val, ngMesh );
698 else if ( !ShapesWithControlPoints.count( key ))
700 SMESHUtils::createPointsSampleFromFace( TopoDS::Face( shape ), val, ControlPoints );
701 ShapesWithControlPoints.insert( key );
705 for(it=SolidId2LocalSize.begin(); it!=SolidId2LocalSize.end(); it++)
707 int key = (*it).first;
708 double val = (*it).second;
709 if ( !ShapesWithControlPoints.count( key ))
711 const TopoDS_Shape& shape = ShapesWithLocalSize.FindKey(key);
712 SMESHUtils::createPointsSampleFromSolid( TopoDS::Solid( shape ), val, ControlPoints );
713 ShapesWithControlPoints.insert( key );
717 if ( !ControlPoints.empty() )
719 for ( size_t i = 0; i < ControlPoints.size(); ++i )
720 NETGENPlugin_Mesher::RestrictLocalSize( ngMesh, ControlPoints[i].XYZ(), ControlPoints[i].Size() );
725 //================================================================================
727 * \brief Restrict local size to achieve a required _chordalError
729 //================================================================================
731 void NETGENPlugin_Mesher::SetLocalSizeForChordalError( netgen::OCCGeometry& occgeo,
732 netgen::Mesh& ngMesh)
734 if ( _chordalError <= 0. )
738 BRepLProp_SLProps surfProp( 2, 1e-6 );
739 const double sizeCoef = 0.95;
741 // find non-planar FACEs with non-constant curvature
742 std::vector<int> fInd;
743 for ( int i = 1; i <= occgeo.fmap.Extent(); ++i )
745 const TopoDS_Face& face = TopoDS::Face( occgeo.fmap( i ));
746 BRepAdaptor_Surface surfAd( face, false );
747 switch ( surfAd.GetType() )
751 case GeomAbs_Cylinder:
753 case GeomAbs_Torus: // constant curvature
755 surfProp.SetSurface( surfAd );
756 surfProp.SetParameters( 0, 0 );
757 double maxCurv = Max( Abs( surfProp.MaxCurvature()), Abs( surfProp.MinCurvature() ));
758 double size = elemSizeForChordalError( _chordalError, 1 / maxCurv );
759 occgeo.SetFaceMaxH( i, size * sizeCoef );
760 // limit size one edges
761 TopTools_MapOfShape edgeMap;
762 for ( TopExp_Explorer eExp( face, TopAbs_EDGE ); eExp.More(); eExp.Next() )
763 if ( edgeMap.Add( eExp.Current() ))
764 setLocalSize( TopoDS::Edge( eExp.Current() ), size, ngMesh, /*overrideMinH=*/false );
768 Handle(Geom_Surface) surf = BRep_Tool::Surface( face, loc );
769 if ( GeomLib_IsPlanarSurface( surf ).IsPlanar() )
778 TopoDS_Compound allFacesComp;
779 b.MakeCompound( allFacesComp );
780 for ( size_t i = 0; i < fInd.size(); ++i )
781 b.Add( allFacesComp, occgeo.fmap( fInd[i] ));
783 // copy the shape to avoid spoiling its triangulation
784 TopoDS_Shape allFacesCompCopy = BRepBuilderAPI_Copy( allFacesComp );
786 // create triangulation with desired chordal error
787 BRepMesh_IncrementalMesh( allFacesCompCopy,
789 /*isRelative = */Standard_False,
790 /*theAngDeflection = */ 0.5,
791 /*isInParallel = */Standard_True);
794 for ( TopExp_Explorer fExp( allFacesCompCopy, TopAbs_FACE ); fExp.More(); fExp.Next() )
796 const TopoDS_Face& face = TopoDS::Face( fExp.Current() );
797 Handle(Poly_Triangulation) triangulation = BRep_Tool::Triangulation ( face, loc );
798 if ( triangulation.IsNull() ) continue;
800 BRepAdaptor_Surface surf( face, false );
801 surfProp.SetSurface( surf );
806 for ( int i = 1; i <= triangulation->NbTriangles(); ++i )
808 Standard_Integer n1,n2,n3;
809 triangulation->Triangles()(i).Get( n1,n2,n3 );
810 p [0] = triangulation->Nodes()(n1).Transformed(loc).XYZ();
811 p [1] = triangulation->Nodes()(n2).Transformed(loc).XYZ();
812 p [2] = triangulation->Nodes()(n3).Transformed(loc).XYZ();
813 uv[0] = triangulation->UVNodes()(n1).XY();
814 uv[1] = triangulation->UVNodes()(n2).XY();
815 uv[2] = triangulation->UVNodes()(n3).XY();
816 surfProp.SetParameters( uv[0].X(), uv[0].Y() );
817 if ( !surfProp.IsCurvatureDefined() )
820 for ( int n = 0; n < 3; ++n ) // get size at triangle nodes
822 surfProp.SetParameters( uv[n].X(), uv[n].Y() );
823 double maxCurv = Max( Abs( surfProp.MaxCurvature()), Abs( surfProp.MinCurvature() ));
824 size[n] = elemSizeForChordalError( _chordalError, 1 / maxCurv );
826 for ( int n1 = 0; n1 < 3; ++n1 ) // limit size along each triangle edge
828 int n2 = ( n1 + 1 ) % 3;
829 double minSize = size[n1], maxSize = size[n2];
830 if ( size[n1] > size[n2] )
831 minSize = size[n2], maxSize = size[n1];
833 if ( maxSize / minSize < 1.2 ) // netgen ignores size difference < 1.2
835 ngMesh.RestrictLocalHLine ( netgen::Point3d( p[n1].X(), p[n1].Y(), p[n1].Z() ),
836 netgen::Point3d( p[n2].X(), p[n2].Y(), p[n2].Z() ),
837 sizeCoef * minSize );
841 gp_XY uvVec( uv[n2] - uv[n1] );
842 double len = ( p[n1] - p[n2] ).Modulus();
843 int nb = int( len / minSize ) + 1;
844 for ( int j = 0; j <= nb; ++j )
846 double r = double( j ) / nb;
847 gp_XY uvj = uv[n1] + r * uvVec;
849 surfProp.SetParameters( uvj.X(), uvj.Y() );
850 double maxCurv = Max( Abs( surfProp.MaxCurvature()), Abs( surfProp.MinCurvature() ));
851 double h = elemSizeForChordalError( _chordalError, 1 / maxCurv );
853 const gp_Pnt& pj = surfProp.Value();
854 netgen::Point3d ngP( pj.X(), pj.Y(), pj.Z());
855 ngMesh.RestrictLocalH( ngP, h * sizeCoef );
864 //================================================================================
866 * \brief Initialize netgen::OCCGeometry with OCCT shape
868 //================================================================================
870 void NETGENPlugin_Mesher::PrepareOCCgeometry(netgen::OCCGeometry& occgeo,
871 const TopoDS_Shape& shape,
873 list< SMESH_subMesh* > * meshedSM,
874 NETGENPlugin_Internals* intern)
876 updateTriangulation( shape );
879 BRepBndLib::Add (shape, bb);
880 double x1,y1,z1,x2,y2,z2;
881 bb.Get (x1,y1,z1,x2,y2,z2);
882 netgen::Point<3> p1 = netgen::Point<3> (x1,y1,z1);
883 netgen::Point<3> p2 = netgen::Point<3> (x2,y2,z2);
884 occgeo.boundingbox = netgen::Box<3> (p1,p2);
886 occgeo.shape = shape;
889 // fill maps of shapes of occgeo with not yet meshed subshapes
891 // get root submeshes
892 list< SMESH_subMesh* > rootSM;
893 const int shapeID = mesh.GetMeshDS()->ShapeToIndex( shape );
894 if ( shapeID > 0 ) { // SMESH_subMesh with ID 0 may exist, don't use it!
895 rootSM.push_back( mesh.GetSubMesh( shape ));
898 for ( TopoDS_Iterator it( shape ); it.More(); it.Next() )
899 rootSM.push_back( mesh.GetSubMesh( it.Value() ));
904 // add subshapes of empty submeshes
905 list< SMESH_subMesh* >::iterator rootIt = rootSM.begin(), rootEnd = rootSM.end();
906 for ( ; rootIt != rootEnd; ++rootIt ) {
907 SMESH_subMesh * root = *rootIt;
908 SMESH_subMeshIteratorPtr smIt = root->getDependsOnIterator(/*includeSelf=*/true,
909 /*complexShapeFirst=*/true);
910 // to find a right orientation of subshapes (PAL20462)
911 TopTools_IndexedMapOfShape subShapes;
912 TopExp::MapShapes(root->GetSubShape(), subShapes);
913 while ( smIt->more() )
915 SMESH_subMesh* sm = smIt->next();
916 TopoDS_Shape shape = sm->GetSubShape();
917 totNbFaces += ( shape.ShapeType() == TopAbs_FACE );
918 if ( intern && intern->isShapeToPrecompute( shape ))
920 if ( !meshedSM || sm->IsEmpty() )
922 if ( shape.ShapeType() != TopAbs_VERTEX )
923 shape = subShapes( subShapes.FindIndex( shape ));// shape -> index -> oriented shape
924 if ( shape.Orientation() >= TopAbs_INTERNAL )
925 shape.Orientation( TopAbs_FORWARD ); // issue 0020676
926 switch ( shape.ShapeType() ) {
927 case TopAbs_FACE : occgeo.fmap.Add( shape ); break;
928 case TopAbs_EDGE : occgeo.emap.Add( shape ); break;
929 case TopAbs_VERTEX: occgeo.vmap.Add( shape ); break;
930 case TopAbs_SOLID :occgeo.somap.Add( shape ); break;
934 // collect submeshes of meshed shapes
937 const int dim = SMESH_Gen::GetShapeDim( shape );
938 meshedSM[ dim ].push_back( sm );
942 occgeo.facemeshstatus.SetSize (totNbFaces);
943 occgeo.facemeshstatus = 0;
944 occgeo.face_maxh_modified.SetSize(totNbFaces);
945 occgeo.face_maxh_modified = 0;
946 occgeo.face_maxh.SetSize(totNbFaces);
947 occgeo.face_maxh = netgen::mparam.maxh;
950 //================================================================================
952 * \brief Return a default min size value suitable for the given geometry.
954 //================================================================================
956 double NETGENPlugin_Mesher::GetDefaultMinSize(const TopoDS_Shape& geom,
957 const double maxSize)
959 updateTriangulation( geom );
963 const int* pi[4] = { &i1, &i2, &i3, &i1 };
966 TopExp_Explorer fExp( geom, TopAbs_FACE );
967 for ( ; fExp.More(); fExp.Next() )
969 Handle(Poly_Triangulation) triangulation =
970 BRep_Tool::Triangulation ( TopoDS::Face( fExp.Current() ), loc);
971 if ( triangulation.IsNull() ) continue;
972 const double fTol = BRep_Tool::Tolerance( TopoDS::Face( fExp.Current() ));
973 const TColgp_Array1OfPnt& points = triangulation->Nodes();
974 const Poly_Array1OfTriangle& trias = triangulation->Triangles();
975 for ( int iT = trias.Lower(); iT <= trias.Upper(); ++iT )
977 trias(iT).Get( i1, i2, i3 );
978 for ( int j = 0; j < 3; ++j )
980 double dist2 = points(*pi[j]).SquareDistance( points( *pi[j+1] ));
981 if ( dist2 < minh && fTol*fTol < dist2 )
983 bb.Add( points(*pi[j]));
987 if ( minh > 0.25 * bb.SquareExtent() ) // simple geometry, rough triangulation
989 minh = 1e-3 * sqrt( bb.SquareExtent());
990 //cout << "BND BOX minh = " <<minh << endl;
994 minh = sqrt( minh ); // triangulation for visualization is rather fine
995 //cout << "TRIANGULATION minh = " <<minh << endl;
997 if ( minh > 0.5 * maxSize )
1003 //================================================================================
1005 * \brief Restrict size of elements at a given point
1007 //================================================================================
1009 void NETGENPlugin_Mesher::RestrictLocalSize(netgen::Mesh& ngMesh,
1012 const bool overrideMinH)
1014 if ( size <= std::numeric_limits<double>::min() )
1016 if ( netgen::mparam.minh > size )
1020 ngMesh.SetMinimalH( size );
1021 netgen::mparam.minh = size;
1025 size = netgen::mparam.minh;
1028 netgen::Point3d pi(p.X(), p.Y(), p.Z());
1029 ngMesh.RestrictLocalH( pi, size );
1032 //================================================================================
1034 * \brief fill ngMesh with nodes and elements of computed submeshes
1036 //================================================================================
1038 bool NETGENPlugin_Mesher::FillNgMesh(netgen::OCCGeometry& occgeom,
1039 netgen::Mesh& ngMesh,
1040 vector<const SMDS_MeshNode*>& nodeVec,
1041 const list< SMESH_subMesh* > & meshedSM,
1042 SMESH_MesherHelper* quadHelper,
1043 SMESH_ProxyMesh::Ptr proxyMesh)
1045 TNode2IdMap nodeNgIdMap;
1046 for ( size_t i = 1; i < nodeVec.size(); ++i )
1047 nodeNgIdMap.insert( make_pair( nodeVec[i], i ));
1049 TopTools_MapOfShape visitedShapes;
1050 map< SMESH_subMesh*, set< int > > visitedEdgeSM2Faces;
1051 set< SMESH_subMesh* > computedSM( meshedSM.begin(), meshedSM.end() );
1053 SMESH_MesherHelper helper (*_mesh);
1055 int faceNgID = ngMesh.GetNFD();
1057 list< SMESH_subMesh* >::const_iterator smIt, smEnd = meshedSM.end();
1058 for ( smIt = meshedSM.begin(); smIt != smEnd; ++smIt )
1060 SMESH_subMesh* sm = *smIt;
1061 if ( !visitedShapes.Add( sm->GetSubShape() ))
1064 const SMESHDS_SubMesh * smDS = sm->GetSubMeshDS();
1065 if ( !smDS ) continue;
1067 switch ( sm->GetSubShape().ShapeType() )
1069 case TopAbs_EDGE: { // EDGE
1070 // ----------------------
1071 TopoDS_Edge geomEdge = TopoDS::Edge( sm->GetSubShape() );
1072 if ( geomEdge.Orientation() >= TopAbs_INTERNAL )
1073 geomEdge.Orientation( TopAbs_FORWARD ); // issue 0020676
1075 // Add ng segments for each not meshed FACE the EDGE bounds
1076 PShapeIteratorPtr fIt = helper.GetAncestors( geomEdge, *sm->GetFather(), TopAbs_FACE );
1077 while ( const TopoDS_Shape * anc = fIt->next() )
1079 faceNgID = occgeom.fmap.FindIndex( *anc );
1081 continue; // meshed face
1083 int faceSMDSId = helper.GetMeshDS()->ShapeToIndex( *anc );
1084 if ( visitedEdgeSM2Faces[ sm ].count( faceSMDSId ))
1085 continue; // already treated EDGE
1087 TopoDS_Face face = TopoDS::Face( occgeom.fmap( faceNgID ));
1088 if ( face.Orientation() >= TopAbs_INTERNAL )
1089 face.Orientation( TopAbs_FORWARD ); // issue 0020676
1091 // get all meshed EDGEs of the FACE connected to geomEdge (issue 0021140)
1092 helper.SetSubShape( face );
1093 list< TopoDS_Edge > edges = getConnectedEdges( geomEdge, face, computedSM, helper,
1094 visitedEdgeSM2Faces );
1095 if ( edges.empty() )
1096 continue; // wrong ancestor?
1098 // find out orientation of <edges> within <face>
1099 TopoDS_Edge eNotSeam = edges.front();
1100 if ( helper.HasSeam() )
1102 list< TopoDS_Edge >::iterator eIt = edges.begin();
1103 while ( helper.IsRealSeam( *eIt )) ++eIt;
1104 if ( eIt != edges.end() )
1107 TopAbs_Orientation fOri = helper.GetSubShapeOri( face, eNotSeam );
1108 bool isForwad = ( fOri == eNotSeam.Orientation() || fOri >= TopAbs_INTERNAL );
1110 // get all nodes from connected <edges>
1111 const bool skipMedium = netgen::mparam.secondorder;//smDS->IsQuadratic();
1112 StdMeshers_FaceSide fSide( face, edges, _mesh, isForwad, skipMedium, &helper );
1113 const vector<UVPtStruct>& points = fSide.GetUVPtStruct();
1114 if ( points.empty() )
1115 return false; // invalid node params?
1116 int i, nbSeg = fSide.NbSegments();
1118 // remember EDGEs of fSide to treat only once
1119 for ( int iE = 0; iE < fSide.NbEdges(); ++iE )
1120 visitedEdgeSM2Faces[ helper.GetMesh()->GetSubMesh( fSide.Edge(iE )) ].insert(faceSMDSId);
1122 double otherSeamParam = 0;
1123 bool isSeam = false;
1127 int prevNgId = ngNodeId( points[0].node, ngMesh, nodeNgIdMap );
1129 for ( i = 0; i < nbSeg; ++i )
1131 const UVPtStruct& p1 = points[ i ];
1132 const UVPtStruct& p2 = points[ i+1 ];
1134 if ( p1.node->GetPosition()->GetTypeOfPosition() == SMDS_TOP_VERTEX ) //an EDGE begins
1137 if ( helper.IsRealSeam( p1.node->getshapeId() ))
1139 TopoDS_Edge e = fSide.Edge( fSide.EdgeIndex( 0.5 * ( p1.normParam + p2.normParam )));
1140 isSeam = helper.IsRealSeam( e );
1143 otherSeamParam = helper.GetOtherParam( helper.GetPeriodicIndex() & 1 ? p2.u : p2.v );
1147 netgen::Segment seg;
1150 seg[1] = prevNgId = ngNodeId( p2.node, ngMesh, nodeNgIdMap );
1151 // node param on curve
1152 seg.epgeominfo[ 0 ].dist = p1.param;
1153 seg.epgeominfo[ 1 ].dist = p2.param;
1155 seg.epgeominfo[ 0 ].u = p1.u;
1156 seg.epgeominfo[ 0 ].v = p1.v;
1157 seg.epgeominfo[ 1 ].u = p2.u;
1158 seg.epgeominfo[ 1 ].v = p2.v;
1160 //geomEdge = fSide.Edge( fSide.EdgeIndex( 0.5 * ( p1.normParam + p2.normParam )));
1161 //seg.epgeominfo[ 0 ].edgenr = seg.epgeominfo[ 1 ].edgenr = occgeom.emap.FindIndex( geomEdge );
1163 //seg.epgeominfo[ iEnd ].edgenr = edgeID; // = geom.emap.FindIndex(edge);
1164 seg.si = faceNgID; // = geom.fmap.FindIndex (face);
1165 seg.edgenr = ngMesh.GetNSeg() + 1; // segment id
1166 ngMesh.AddSegment (seg);
1168 SMESH_TNodeXYZ np1( p1.node ), np2( p2.node );
1169 RestrictLocalSize( ngMesh, 0.5*(np1+np2), (np1-np2).Modulus() );
1171 #ifdef DUMP_SEGMENTS
1172 cout << "Segment: " << seg.edgenr << " on SMESH face " << helper.GetMeshDS()->ShapeToIndex( face ) << endl
1173 << "\tface index: " << seg.si << endl
1174 << "\tp1: " << seg[0] << endl
1175 << "\tp2: " << seg[1] << endl
1176 << "\tp0 param: " << seg.epgeominfo[ 0 ].dist << endl
1177 << "\tp0 uv: " << seg.epgeominfo[ 0 ].u <<", "<< seg.epgeominfo[ 0 ].v << endl
1178 //<< "\tp0 edge: " << seg.epgeominfo[ 0 ].edgenr << endl
1179 << "\tp1 param: " << seg.epgeominfo[ 1 ].dist << endl
1180 << "\tp1 uv: " << seg.epgeominfo[ 1 ].u <<", "<< seg.epgeominfo[ 1 ].v << endl;
1181 //<< "\tp1 edge: " << seg.epgeominfo[ 1 ].edgenr << endl;
1185 if ( helper.GetPeriodicIndex() && 1 ) {
1186 seg.epgeominfo[ 0 ].u = otherSeamParam;
1187 seg.epgeominfo[ 1 ].u = otherSeamParam;
1188 swap (seg.epgeominfo[0].v, seg.epgeominfo[1].v);
1190 seg.epgeominfo[ 0 ].v = otherSeamParam;
1191 seg.epgeominfo[ 1 ].v = otherSeamParam;
1192 swap (seg.epgeominfo[0].u, seg.epgeominfo[1].u);
1194 swap( seg[0], seg[1] );
1195 swap( seg.epgeominfo[0].dist, seg.epgeominfo[1].dist );
1196 seg.edgenr = ngMesh.GetNSeg() + 1; // segment id
1197 ngMesh.AddSegment( seg );
1198 #ifdef DUMP_SEGMENTS
1199 cout << "Segment: " << seg.edgenr << endl
1200 << "\t is SEAM (reverse) of the previous. "
1201 << " Other " << (helper.GetPeriodicIndex() && 1 ? "U" : "V")
1202 << " = " << otherSeamParam << endl;
1205 else if ( fOri == TopAbs_INTERNAL )
1207 swap( seg[0], seg[1] );
1208 swap( seg.epgeominfo[0], seg.epgeominfo[1] );
1209 seg.edgenr = ngMesh.GetNSeg() + 1; // segment id
1210 ngMesh.AddSegment( seg );
1211 #ifdef DUMP_SEGMENTS
1212 cout << "Segment: " << seg.edgenr << endl << "\t is REVERSE of the previous" << endl;
1216 } // loop on geomEdge ancestors
1218 if ( quadHelper ) // remember medium nodes of sub-meshes
1220 SMDS_ElemIteratorPtr edges = smDS->GetElements();
1221 while ( edges->more() )
1223 const SMDS_MeshElement* e = edges->next();
1224 if ( !quadHelper->AddTLinks( static_cast< const SMDS_MeshEdge*>( e )))
1230 } // case TopAbs_EDGE
1232 case TopAbs_FACE: { // FACE
1233 // ----------------------
1234 const TopoDS_Face& geomFace = TopoDS::Face( sm->GetSubShape() );
1235 helper.SetSubShape( geomFace );
1236 bool isInternalFace = ( geomFace.Orientation() == TopAbs_INTERNAL );
1238 // Find solids the geomFace bounds
1239 int solidID1 = 0, solidID2 = 0;
1241 PShapeIteratorPtr solidIt = helper.GetAncestors( geomFace, *sm->GetFather(), TopAbs_SOLID);
1242 while ( const TopoDS_Shape * solid = solidIt->next() )
1244 int id = occgeom.somap.FindIndex ( *solid );
1245 if ( solidID1 && id != solidID1 ) solidID2 = id;
1249 if ( proxyMesh && proxyMesh->GetProxySubMesh( geomFace ))
1251 // if a proxy sub-mesh contains temporary faces, then these faces
1252 // should be used to mesh only one SOLID
1253 bool hasTmp = false;
1254 smDS = proxyMesh->GetSubMesh( geomFace );
1255 SMDS_ElemIteratorPtr faces = smDS->GetElements();
1256 while ( faces->more() )
1258 const SMDS_MeshElement* f = faces->next();
1259 if ( proxyMesh->IsTemporary( f ))
1262 std::vector<const SMDS_MeshNode*> fNodes( f->begin_nodes(), f->end_nodes() );
1263 std::vector<const SMDS_MeshElement*> vols;
1264 if ( _mesh->GetMeshDS()->GetElementsByNodes( fNodes, vols, SMDSAbs_Volume ) == 1 )
1266 int geomID = vols[0]->getshapeId();
1267 const TopoDS_Shape& solid = helper.GetMeshDS()->IndexToShape( geomID );
1268 if ( !solid.IsNull() )
1269 solidID1 = occgeom.somap.FindIndex ( solid );
1275 // exclude faces generated by NETGEN from computation of 3D mesh
1276 const int fID = occgeom.fmap.FindIndex( geomFace );
1277 if ( !hasTmp ) // shrunk mesh
1279 // move netgen points according to moved nodes
1280 SMESH_subMeshIteratorPtr smIt = sm->getDependsOnIterator(/*includeSelf=*/true);
1281 while ( smIt->more() )
1283 SMESH_subMesh* sub = smIt->next();
1284 if ( !sub->GetSubMeshDS() ) continue;
1285 SMDS_NodeIteratorPtr nodeIt = sub->GetSubMeshDS()->GetNodes();
1286 while ( nodeIt->more() )
1288 const SMDS_MeshNode* n = nodeIt->next();
1289 int ngID = ngNodeId( n, ngMesh, nodeNgIdMap );
1290 netgen::MeshPoint& ngPoint = ngMesh.Point( ngID );
1291 ngPoint(0) = n->X();
1292 ngPoint(1) = n->Y();
1293 ngPoint(2) = n->Z();
1296 // remove faces near boundary to avoid their overlapping
1297 // with shrunk faces
1298 for ( int i = 1; i <= ngMesh.GetNSE(); ++i )
1300 const netgen::Element2d& elem = ngMesh.SurfaceElement(i);
1301 if ( elem.GetIndex() == fID )
1303 for ( int iN = 0; iN < elem.GetNP(); ++iN )
1304 if ( ngMesh[ elem[ iN ]].Type() != netgen::SURFACEPOINT )
1306 ngMesh.DeleteSurfaceElement( i );
1315 ngMesh.AddFaceDescriptor( netgen::FaceDescriptor( faceNgID,/*solid1=*/0,/*solid2=*/0,0 ));
1316 for (int i = 1; i <= ngMesh.GetNSE(); ++i )
1318 const netgen::Element2d& elem = ngMesh.SurfaceElement(i);
1319 if ( elem.GetIndex() == fID )
1320 const_cast< netgen::Element2d& >( elem ).SetIndex( faceNgID );
1324 // Add ng face descriptors of meshed faces
1326 ngMesh.AddFaceDescriptor( netgen::FaceDescriptor( faceNgID, solidID1, solidID2, 0 ));
1328 // if second oreder is required, even already meshed faces must be passed to NETGEN
1329 int fID = occgeom.fmap.Add( geomFace );
1330 if ( occgeom.facemeshstatus.Size() < fID ) occgeom.facemeshstatus.SetSize( fID );
1331 occgeom.facemeshstatus[ fID-1 ] = netgen::FACE_MESHED_OK;
1332 while ( fID < faceNgID ) // geomFace is already in occgeom.fmap, add a copy
1334 fID = occgeom.fmap.Add( BRepBuilderAPI_Copy( geomFace, /*copyGeom=*/false ));
1335 if ( occgeom.facemeshstatus.Size() < fID ) occgeom.facemeshstatus.SetSize( fID );
1336 occgeom.facemeshstatus[ fID-1 ] = netgen::FACE_MESHED_OK;
1338 // Problem with the second order in a quadrangular mesh remains.
1339 // 1) All quadrangles generated by NETGEN are moved to an inexistent face
1340 // by FillSMesh() (find "AddFaceDescriptor")
1341 // 2) Temporary triangles generated by StdMeshers_QuadToTriaAdaptor
1342 // are on faces where quadrangles were.
1343 // Due to these 2 points, wrong geom faces are used while conversion to quadratic
1344 // of the mentioned above quadrangles and triangles
1346 // Orient the face correctly in solidID1 (issue 0020206)
1347 bool reverse = false;
1349 TopoDS_Shape solid = occgeom.somap( solidID1 );
1350 TopAbs_Orientation faceOriInSolid = helper.GetSubShapeOri( solid, geomFace );
1351 if ( faceOriInSolid >= 0 )
1353 helper.IsReversedSubMesh( TopoDS::Face( geomFace.Oriented( faceOriInSolid )));
1356 // Add surface elements
1358 netgen::Element2d tri(3);
1359 tri.SetIndex( faceNgID );
1360 SMESH_TNodeXYZ xyz[3];
1362 #ifdef DUMP_TRIANGLES
1363 cout << "SMESH face " << helper.GetMeshDS()->ShapeToIndex( geomFace )
1364 << " internal="<<isInternalFace << endl;
1367 SMDS_ElemIteratorPtr faces = smDS->GetElements();
1368 while ( faces->more() )
1370 const SMDS_MeshElement* f = faces->next();
1371 if ( f->NbNodes() % 3 != 0 ) // not triangle
1373 PShapeIteratorPtr solidIt=helper.GetAncestors(geomFace,*sm->GetFather(),TopAbs_SOLID);
1374 if ( const TopoDS_Shape * solid = solidIt->next() )
1375 sm = _mesh->GetSubMesh( *solid );
1376 SMESH_BadInputElements* badElems =
1377 new SMESH_BadInputElements( helper.GetMeshDS(), COMPERR_BAD_INPUT_MESH,
1378 "Not triangle sub-mesh");
1380 sm->GetComputeError().reset( badElems );
1384 for ( int i = 0; i < 3; ++i )
1386 const SMDS_MeshNode* node = f->GetNode( i ), * inFaceNode=0;
1389 // get node UV on face
1390 int shapeID = node->getshapeId();
1391 if ( helper.IsSeamShape( shapeID ))
1393 if ( helper.IsSeamShape( f->GetNodeWrap( i+1 )->getshapeId() ))
1394 inFaceNode = f->GetNodeWrap( i-1 );
1396 inFaceNode = f->GetNodeWrap( i+1 );
1398 gp_XY uv = helper.GetNodeUV( geomFace, node, inFaceNode );
1400 int ind = reverse ? 3-i : i+1;
1401 tri.GeomInfoPi(ind).u = uv.X();
1402 tri.GeomInfoPi(ind).v = uv.Y();
1403 tri.PNum (ind) = ngNodeId( node, ngMesh, nodeNgIdMap );
1406 // pass a triangle size to NG size-map
1407 double size = ( ( xyz[0] - xyz[1] ).Modulus() +
1408 ( xyz[1] - xyz[2] ).Modulus() +
1409 ( xyz[2] - xyz[0] ).Modulus() ) / 3;
1410 gp_XYZ gc = ( xyz[0] + xyz[1] + xyz[2] ) / 3;
1411 RestrictLocalSize( ngMesh, gc, size, /*overrideMinH=*/false );
1413 ngMesh.AddSurfaceElement (tri);
1414 #ifdef DUMP_TRIANGLES
1415 cout << tri << endl;
1418 if ( isInternalFace )
1420 swap( tri[1], tri[2] );
1421 ngMesh.AddSurfaceElement (tri);
1422 #ifdef DUMP_TRIANGLES
1423 cout << tri << endl;
1428 if ( quadHelper ) // remember medium nodes of sub-meshes
1430 SMDS_ElemIteratorPtr faces = smDS->GetElements();
1431 while ( faces->more() )
1433 const SMDS_MeshElement* f = faces->next();
1434 if ( !quadHelper->AddTLinks( static_cast< const SMDS_MeshFace*>( f )))
1440 } // case TopAbs_FACE
1442 case TopAbs_VERTEX: { // VERTEX
1443 // --------------------------
1444 // issue 0021405. Add node only if a VERTEX is shared by a not meshed EDGE,
1445 // else netgen removes a free node and nodeVector becomes invalid
1446 PShapeIteratorPtr ansIt = helper.GetAncestors( sm->GetSubShape(),
1450 while ( const TopoDS_Shape* e = ansIt->next() )
1452 SMESH_subMesh* eSub = helper.GetMesh()->GetSubMesh( *e );
1453 if (( toAdd = ( eSub->IsEmpty() && !SMESH_Algo::isDegenerated( TopoDS::Edge( *e )))))
1458 SMDS_NodeIteratorPtr nodeIt = smDS->GetNodes();
1459 if ( nodeIt->more() )
1460 ngNodeId( nodeIt->next(), ngMesh, nodeNgIdMap );
1466 } // loop on submeshes
1469 nodeVec.resize( ngMesh.GetNP() + 1 );
1470 TNode2IdMap::iterator node_NgId, nodeNgIdEnd = nodeNgIdMap.end();
1471 for ( node_NgId = nodeNgIdMap.begin(); node_NgId != nodeNgIdEnd; ++node_NgId)
1472 nodeVec[ node_NgId->second ] = node_NgId->first;
1477 //================================================================================
1479 * \brief Duplicate mesh faces on internal geom faces
1481 //================================================================================
1483 void NETGENPlugin_Mesher::FixIntFaces(const netgen::OCCGeometry& occgeom,
1484 netgen::Mesh& ngMesh,
1485 NETGENPlugin_Internals& internalShapes)
1487 SMESHDS_Mesh* meshDS = internalShapes.getMesh().GetMeshDS();
1489 // find ng indices of internal faces
1491 for ( int ngFaceID = 1; ngFaceID <= occgeom.fmap.Extent(); ++ngFaceID )
1493 int smeshID = meshDS->ShapeToIndex( occgeom.fmap( ngFaceID ));
1494 if ( internalShapes.isInternalShape( smeshID ))
1495 ngFaceIds.insert( ngFaceID );
1497 if ( !ngFaceIds.empty() )
1500 int i, nbFaces = ngMesh.GetNSE();
1501 for ( i = 1; i <= nbFaces; ++i)
1503 netgen::Element2d elem = ngMesh.SurfaceElement(i);
1504 if ( ngFaceIds.count( elem.GetIndex() ))
1506 swap( elem[1], elem[2] );
1507 ngMesh.AddSurfaceElement (elem);
1513 //================================================================================
1515 * \brief Tries to heal the mesh on a FACE. The FACE is supposed to be partially
1516 * meshed due to NETGEN failure
1517 * \param [in] occgeom - geometry
1518 * \param [in,out] ngMesh - the mesh to fix
1519 * \param [inout] faceID - ID of the FACE to fix the mesh on
1520 * \return bool - is mesh is or becomes OK
1522 //================================================================================
1524 bool NETGENPlugin_Mesher::FixFaceMesh(const netgen::OCCGeometry& occgeom,
1525 netgen::Mesh& ngMesh,
1528 // we address a case where the FACE is almost fully meshed except small holes
1529 // of usually triangular shape at FACE boundary (IPAL52861)
1531 // The case appeared to be not simple: holes only look triangular but
1532 // indeed are a self intersecting polygon. A reason of the bug was in coincident
1533 // NG points on a seam edge. But the code below is very nice, leave it for
1538 if ( occgeom.fmap.Extent() < faceID )
1540 //const TopoDS_Face& face = TopoDS::Face( occgeom.fmap( faceID ));
1542 // find free links on the FACE
1543 NCollection_Map<Link> linkMap;
1544 for ( int iF = 1; iF <= ngMesh.GetNSE(); ++iF )
1546 const netgen::Element2d& elem = ngMesh.SurfaceElement(iF);
1547 if ( faceID != elem.GetIndex() )
1549 int n0 = elem[ elem.GetNP() - 1 ];
1550 for ( int i = 0; i < elem.GetNP(); ++i )
1553 Link link( n0, n1 );
1554 if ( !linkMap.Add( link ))
1555 linkMap.Remove( link );
1559 // add/remove boundary links
1560 for ( int iSeg = 1; iSeg <= ngMesh.GetNSeg(); ++iSeg )
1562 const netgen::Segment& seg = ngMesh.LineSegment( iSeg );
1563 if ( seg.si != faceID ) // !edgeIDs.Contains( seg.edgenr ))
1565 Link link( seg[1], seg[0] ); // reverse!!!
1566 if ( !linkMap.Add( link ))
1567 linkMap.Remove( link );
1569 if ( linkMap.IsEmpty() )
1571 if ( linkMap.Extent() < 3 )
1574 // make triangles of the links
1576 netgen::Element2d tri(3);
1577 tri.SetIndex ( faceID );
1579 NCollection_Map<Link>::Iterator linkIt( linkMap );
1580 Link link1 = linkIt.Value();
1581 // look for a link connected to link1
1582 NCollection_Map<Link>::Iterator linkIt2 = linkIt;
1583 for ( linkIt2.Next(); linkIt2.More(); linkIt2.Next() )
1585 const Link& link2 = linkIt2.Value();
1586 if ( link2.IsConnected( link1 ))
1588 // look for a link connected to both link1 and link2
1589 NCollection_Map<Link>::Iterator linkIt3 = linkIt2;
1590 for ( linkIt3.Next(); linkIt3.More(); linkIt3.Next() )
1592 const Link& link3 = linkIt3.Value();
1593 if ( link3.IsConnected( link1 ) &&
1594 link3.IsConnected( link2 ) )
1599 tri[2] = ( link2.Contains( link1.n1 ) ? link2.n1 : link3.n1 );
1600 if ( tri[0] == tri[2] || tri[1] == tri[2] )
1602 ngMesh.AddSurfaceElement( tri );
1604 // prepare for the next tria search
1605 if ( linkMap.Extent() == 3 )
1607 linkMap.Remove( link3 );
1608 linkMap.Remove( link2 );
1610 linkMap.Remove( link1 );
1611 link1 = linkIt.Value();
1624 //================================================================================
1625 // define gp_XY_Subtracted pointer to function calling gp_XY::Subtracted(gp_XY)
1626 gp_XY_FunPtr(Subtracted);
1627 //gp_XY_FunPtr(Added);
1629 //================================================================================
1631 * \brief Evaluate distance between two 2d points along the surface
1633 //================================================================================
1635 double evalDist( const gp_XY& uv1,
1637 const Handle(Geom_Surface)& surf,
1638 const int stopHandler=-1)
1640 if ( stopHandler > 0 ) // continue recursion
1642 gp_XY mid = SMESH_MesherHelper::GetMiddleUV( surf, uv1, uv2 );
1643 return evalDist( uv1,mid, surf, stopHandler-1 ) + evalDist( mid,uv2, surf, stopHandler-1 );
1645 double dist3D = surf->Value( uv1.X(), uv1.Y() ).Distance( surf->Value( uv2.X(), uv2.Y() ));
1646 if ( stopHandler == 0 ) // stop recursion
1649 // start recursion if necessary
1650 double dist2D = SMESH_MesherHelper::ApplyIn2D(surf, uv1, uv2, gp_XY_Subtracted, 0).Modulus();
1651 if ( fabs( dist3D - dist2D ) < dist2D * 1e-10 )
1652 return dist3D; // equal parametrization of a planar surface
1654 return evalDist( uv1, uv2, surf, 3 ); // start recursion
1657 //================================================================================
1659 * \brief Data of vertex internal in geom face
1661 //================================================================================
1665 gp_XY uv; //!< UV in face parametric space
1666 int ngId; //!< ng id of corresponding node
1667 gp_XY uvClose; //!< UV of closest boundary node
1668 int ngIdClose; //!< ng id of closest boundary node
1671 //================================================================================
1673 * \brief Data of vertex internal in solid
1675 //================================================================================
1679 int ngId; //!< ng id of corresponding node
1680 int ngIdClose; //!< ng id of closest 2d mesh element
1681 int ngIdCloseN; //!< ng id of closest node of the closest 2d mesh element
1684 inline double dist2( const netgen::MeshPoint& p1, const netgen::MeshPoint& p2 )
1686 return gp_Pnt( NGPOINT_COORDS(p1)).SquareDistance( gp_Pnt( NGPOINT_COORDS(p2)));
1689 // inline double dist2(const netgen::MeshPoint& p, const SMDS_MeshNode* n )
1691 // return gp_Pnt( NGPOINT_COORDS(p)).SquareDistance( SMESH_NodeXYZ(n));
1695 //================================================================================
1697 * \brief Make netgen take internal vertices in faces into account by adding
1698 * segments including internal vertices
1700 * This function works in supposition that 1D mesh is already computed in ngMesh
1702 //================================================================================
1704 void NETGENPlugin_Mesher::AddIntVerticesInFaces(const netgen::OCCGeometry& occgeom,
1705 netgen::Mesh& ngMesh,
1706 vector<const SMDS_MeshNode*>& nodeVec,
1707 NETGENPlugin_Internals& internalShapes)
1709 if ((int) nodeVec.size() < ngMesh.GetNP() )
1710 nodeVec.resize( ngMesh.GetNP(), 0 );
1712 SMESHDS_Mesh* meshDS = internalShapes.getMesh().GetMeshDS();
1713 SMESH_MesherHelper helper( internalShapes.getMesh() );
1715 const map<int,list<int> >& face2Vert = internalShapes.getFacesWithVertices();
1716 map<int,list<int> >::const_iterator f2v = face2Vert.begin();
1717 for ( ; f2v != face2Vert.end(); ++f2v )
1719 const TopoDS_Face& face = TopoDS::Face( meshDS->IndexToShape( f2v->first ));
1720 if ( face.IsNull() ) continue;
1721 int faceNgID = occgeom.fmap.FindIndex (face);
1722 if ( faceNgID < 0 ) continue;
1724 TopLoc_Location loc;
1725 Handle(Geom_Surface) surf = BRep_Tool::Surface(face,loc);
1727 helper.SetSubShape( face );
1728 helper.SetElementsOnShape( true );
1730 // Get data of internal vertices and add them to ngMesh
1732 multimap< double, TIntVData > dist2VData; // sort vertices by distance from boundary nodes
1734 int i, nbSegInit = ngMesh.GetNSeg();
1736 // boundary characteristics
1737 double totSegLen2D = 0;
1740 const list<int>& iVertices = f2v->second;
1741 list<int>::const_iterator iv = iVertices.begin();
1742 for ( int nbV = 0; iv != iVertices.end(); ++iv, nbV++ )
1745 // get node on vertex
1746 const TopoDS_Vertex V = TopoDS::Vertex( meshDS->IndexToShape( *iv ));
1747 const SMDS_MeshNode * nV = SMESH_Algo::VertexNode( V, meshDS );
1750 SMESH_subMesh* sm = helper.GetMesh()->GetSubMesh( V );
1751 sm->ComputeStateEngine( SMESH_subMesh::COMPUTE );
1752 nV = SMESH_Algo::VertexNode( V, meshDS );
1753 if ( !nV ) continue;
1756 netgen::MeshPoint mp( netgen::Point<3> (nV->X(), nV->Y(), nV->Z()) );
1757 ngMesh.AddPoint ( mp, 1, netgen::EDGEPOINT );
1758 vData.ngId = ngMesh.GetNP();
1759 nodeVec.push_back( nV );
1763 vData.uv = helper.GetNodeUV( face, nV, 0, &uvOK );
1764 if ( !uvOK ) helper.CheckNodeUV( face, nV, vData.uv, BRep_Tool::Tolerance(V),/*force=*/1);
1766 // loop on all segments of the face to find the node closest to vertex and to count
1767 // average segment 2d length
1768 double closeDist2 = numeric_limits<double>::max(), dist2;
1770 for (i = 1; i <= ngMesh.GetNSeg(); ++i)
1772 netgen::Segment & seg = ngMesh.LineSegment(i);
1773 if ( seg.si != faceNgID ) continue;
1775 for ( int iEnd = 0; iEnd < 2; ++iEnd)
1777 uv[iEnd].SetCoord( seg.epgeominfo[iEnd].u, seg.epgeominfo[iEnd].v );
1778 if ( ngIdLast == seg[ iEnd ] ) continue;
1779 dist2 = helper.ApplyIn2D(surf, uv[iEnd], vData.uv, gp_XY_Subtracted,0).SquareModulus();
1780 if ( dist2 < closeDist2 )
1781 vData.ngIdClose = seg[ iEnd ], vData.uvClose = uv[iEnd], closeDist2 = dist2;
1782 ngIdLast = seg[ iEnd ];
1786 totSegLen2D += helper.ApplyIn2D(surf, uv[0], uv[1], gp_XY_Subtracted, false).Modulus();
1790 dist2VData.insert( make_pair( closeDist2, vData ));
1793 if ( totNbSeg == 0 ) break;
1794 double avgSegLen2d = totSegLen2D / totNbSeg;
1796 // Loop on vertices to add segments
1798 multimap< double, TIntVData >::iterator dist_vData = dist2VData.begin();
1799 for ( ; dist_vData != dist2VData.end(); ++dist_vData )
1801 double closeDist2 = dist_vData->first, dist2;
1802 TIntVData & vData = dist_vData->second;
1804 // try to find more close node among segments added for internal vertices
1805 for (i = nbSegInit+1; i <= ngMesh.GetNSeg(); ++i)
1807 netgen::Segment & seg = ngMesh.LineSegment(i);
1808 if ( seg.si != faceNgID ) continue;
1810 for ( int iEnd = 0; iEnd < 2; ++iEnd)
1812 uv[iEnd].SetCoord( seg.epgeominfo[iEnd].u, seg.epgeominfo[iEnd].v );
1813 dist2 = helper.ApplyIn2D(surf, uv[iEnd], vData.uv, gp_XY_Subtracted,0).SquareModulus();
1814 if ( dist2 < closeDist2 )
1815 vData.ngIdClose = seg[ iEnd ], vData.uvClose = uv[iEnd], closeDist2 = dist2;
1818 // decide whether to use the closest node as the second end of segment or to
1819 // create a new point
1820 int segEnd1 = vData.ngId;
1821 int segEnd2 = vData.ngIdClose; // to use closest node
1822 gp_XY uvV = vData.uv, uvP = vData.uvClose;
1823 double segLenHint = ngMesh.GetH( ngMesh.Point( vData.ngId ));
1824 double nodeDist2D = sqrt( closeDist2 );
1825 double nodeDist3D = evalDist( vData.uv, vData.uvClose, surf );
1826 bool avgLenOK = ( avgSegLen2d < 0.75 * nodeDist2D );
1827 bool hintLenOK = ( segLenHint < 0.75 * nodeDist3D );
1828 //cout << "uvV " << uvV.X() <<","<<uvV.Y() << " ";
1829 if ( hintLenOK || avgLenOK )
1831 // create a point between the closest node and V
1834 double r = min( 0.5, ( hintLenOK ? segLenHint/nodeDist3D : avgSegLen2d/nodeDist2D ));
1835 // direction from V to closet node in 2D
1836 gp_Dir2d v2n( helper.ApplyIn2D(surf, uvP, uvV, gp_XY_Subtracted, false ));
1838 uvP = vData.uv + r * nodeDist2D * v2n.XY();
1839 gp_Pnt P = surf->Value( uvP.X(), uvP.Y() ).Transformed( loc );
1841 netgen::MeshPoint mp( netgen::Point<3> (P.X(), P.Y(), P.Z()));
1842 ngMesh.AddPoint ( mp, 1, netgen::EDGEPOINT );
1843 segEnd2 = ngMesh.GetNP();
1844 //cout << "Middle " << r << " uv " << uvP.X() << "," << uvP.Y() << "( " << ngMesh.Point(segEnd2).X()<<","<<ngMesh.Point(segEnd2).Y()<<","<<ngMesh.Point(segEnd2).Z()<<" )"<< endl;
1845 SMDS_MeshNode * nP = helper.AddNode(P.X(), P.Y(), P.Z());
1846 nodeVec.push_back( nP );
1848 //else cout << "at Node " << " uv " << uvP.X() << "," << uvP.Y() << endl;
1851 netgen::Segment seg;
1853 if ( segEnd1 > segEnd2 ) swap( segEnd1, segEnd2 ), swap( uvV, uvP );
1854 seg[0] = segEnd1; // ng node id
1855 seg[1] = segEnd2; // ng node id
1856 seg.edgenr = ngMesh.GetNSeg() + 1;// segment id
1859 seg.epgeominfo[ 0 ].dist = 0; // param on curve
1860 seg.epgeominfo[ 0 ].u = uvV.X();
1861 seg.epgeominfo[ 0 ].v = uvV.Y();
1862 seg.epgeominfo[ 1 ].dist = 1; // param on curve
1863 seg.epgeominfo[ 1 ].u = uvP.X();
1864 seg.epgeominfo[ 1 ].v = uvP.Y();
1866 // seg.epgeominfo[ 0 ].edgenr = 10; // = geom.emap.FindIndex(edge);
1867 // seg.epgeominfo[ 1 ].edgenr = 10; // = geom.emap.FindIndex(edge);
1869 ngMesh.AddSegment (seg);
1871 // add reverse segment
1872 swap( seg[0], seg[1] );
1873 swap( seg.epgeominfo[0], seg.epgeominfo[1] );
1874 seg.edgenr = ngMesh.GetNSeg() + 1; // segment id
1875 ngMesh.AddSegment (seg);
1879 ngMesh.CalcSurfacesOfNode();
1882 //================================================================================
1884 * \brief Make netgen take internal vertices in solids into account by adding
1885 * faces including internal vertices
1887 * This function works in supposition that 2D mesh is already computed in ngMesh
1889 //================================================================================
1891 void NETGENPlugin_Mesher::AddIntVerticesInSolids(const netgen::OCCGeometry& occgeom,
1892 netgen::Mesh& ngMesh,
1893 vector<const SMDS_MeshNode*>& nodeVec,
1894 NETGENPlugin_Internals& internalShapes)
1896 #ifdef DUMP_TRIANGLES_SCRIPT
1897 // create a python script making a mesh containing triangles added for internal vertices
1898 ofstream py(DUMP_TRIANGLES_SCRIPT);
1899 py << "import SMESH"<< endl
1900 << "from salome.smesh import smeshBuilder"<<endl
1901 << "smesh = smeshBuilder.New()"<<endl
1902 << "m = smesh.Mesh(name='triangles')" << endl;
1904 if ((int) nodeVec.size() < ngMesh.GetNP() )
1905 nodeVec.resize( ngMesh.GetNP(), 0 );
1907 SMESHDS_Mesh* meshDS = internalShapes.getMesh().GetMeshDS();
1908 SMESH_MesherHelper helper( internalShapes.getMesh() );
1910 const map<int,list<int> >& so2Vert = internalShapes.getSolidsWithVertices();
1911 map<int,list<int> >::const_iterator s2v = so2Vert.begin();
1912 for ( ; s2v != so2Vert.end(); ++s2v )
1914 const TopoDS_Shape& solid = meshDS->IndexToShape( s2v->first );
1915 if ( solid.IsNull() ) continue;
1916 int solidNgID = occgeom.somap.FindIndex (solid);
1917 if ( solidNgID < 0 && !occgeom.somap.IsEmpty() ) continue;
1919 helper.SetSubShape( solid );
1920 helper.SetElementsOnShape( true );
1922 // find ng indices of faces within the solid
1924 for (TopExp_Explorer fExp(solid, TopAbs_FACE); fExp.More(); fExp.Next() )
1925 ngFaceIds.insert( occgeom.fmap.FindIndex( fExp.Current() ));
1926 if ( ngFaceIds.size() == 1 && *ngFaceIds.begin() == 0 )
1927 ngFaceIds.insert( 1 );
1929 // Get data of internal vertices and add them to ngMesh
1931 multimap< double, TIntVSoData > dist2VData; // sort vertices by distance from ng faces
1933 int i, nbFaceInit = ngMesh.GetNSE();
1935 // boundary characteristics
1936 double totSegLen = 0;
1939 const list<int>& iVertices = s2v->second;
1940 list<int>::const_iterator iv = iVertices.begin();
1941 for ( int nbV = 0; iv != iVertices.end(); ++iv, nbV++ )
1944 const TopoDS_Vertex V = TopoDS::Vertex( meshDS->IndexToShape( *iv ));
1946 // get node on vertex
1947 const SMDS_MeshNode * nV = SMESH_Algo::VertexNode( V, meshDS );
1950 SMESH_subMesh* sm = helper.GetMesh()->GetSubMesh( V );
1951 sm->ComputeStateEngine( SMESH_subMesh::COMPUTE );
1952 nV = SMESH_Algo::VertexNode( V, meshDS );
1953 if ( !nV ) continue;
1956 netgen::MeshPoint mpV( netgen::Point<3> (nV->X(), nV->Y(), nV->Z()) );
1957 ngMesh.AddPoint ( mpV, 1, netgen::FIXEDPOINT );
1958 vData.ngId = ngMesh.GetNP();
1959 nodeVec.push_back( nV );
1961 // loop on all 2d elements to find the one closest to vertex and to count
1962 // average segment length
1963 double closeDist2 = numeric_limits<double>::max(), avgDist2;
1964 for (i = 1; i <= ngMesh.GetNSE(); ++i)
1966 const netgen::Element2d& elem = ngMesh.SurfaceElement(i);
1967 if ( !ngFaceIds.count( elem.GetIndex() )) continue;
1969 multimap< double, int> dist2nID; // sort nodes of element by distance from V
1970 for ( int j = 0; j < elem.GetNP(); ++j)
1972 netgen::MeshPoint mp = ngMesh.Point( elem[j] );
1973 double d2 = dist2( mpV, mp );
1974 dist2nID.insert( make_pair( d2, elem[j] ));
1975 avgDist2 += d2 / elem.GetNP();
1977 totNbSeg++, totSegLen+= sqrt( dist2( mp, ngMesh.Point( elem[(j+1)%elem.GetNP()])));
1979 double dist = dist2nID.begin()->first; //avgDist2;
1980 if ( dist < closeDist2 )
1981 vData.ngIdClose= i, vData.ngIdCloseN= dist2nID.begin()->second, closeDist2= dist;
1983 dist2VData.insert( make_pair( closeDist2, vData ));
1986 if ( totNbSeg == 0 ) break;
1987 double avgSegLen = totSegLen / totNbSeg;
1989 // Loop on vertices to add triangles
1991 multimap< double, TIntVSoData >::iterator dist_vData = dist2VData.begin();
1992 for ( ; dist_vData != dist2VData.end(); ++dist_vData )
1994 double closeDist2 = dist_vData->first;
1995 TIntVSoData & vData = dist_vData->second;
1997 const netgen::MeshPoint& mpV = ngMesh.Point( vData.ngId );
1999 // try to find more close face among ones added for internal vertices
2000 for (i = nbFaceInit+1; i <= ngMesh.GetNSE(); ++i)
2002 double avgDist2 = 0;
2003 multimap< double, int> dist2nID;
2004 const netgen::Element2d& elem = ngMesh.SurfaceElement(i);
2005 for ( int j = 0; j < elem.GetNP(); ++j)
2007 double d = dist2( mpV, ngMesh.Point( elem[j] ));
2008 dist2nID.insert( make_pair( d, elem[j] ));
2009 avgDist2 += d / elem.GetNP();
2010 if ( avgDist2 < closeDist2 )
2011 vData.ngIdClose= i, vData.ngIdCloseN= dist2nID.begin()->second, closeDist2= avgDist2;
2014 // sort nodes of the closest face by angle with vector from V to the closest node
2015 const double tol = numeric_limits<double>::min();
2016 map< double, int > angle2ID;
2017 const netgen::Element2d& closeFace = ngMesh.SurfaceElement( vData.ngIdClose );
2018 netgen::MeshPoint mp[2];
2019 mp[0] = ngMesh.Point( vData.ngIdCloseN );
2020 gp_XYZ p1( NGPOINT_COORDS( mp[0] ));
2021 gp_XYZ pV( NGPOINT_COORDS( mpV ));
2022 gp_Vec v2p1( pV, p1 );
2023 double distN1 = v2p1.Magnitude();
2024 if ( distN1 <= tol ) continue;
2026 for ( int j = 0; j < closeFace.GetNP(); ++j)
2028 mp[1] = ngMesh.Point( closeFace[j] );
2029 gp_Vec v2p( pV, gp_Pnt( NGPOINT_COORDS( mp[1] )) );
2030 angle2ID.insert( make_pair( v2p1.Angle( v2p ), closeFace[j]));
2032 // get node with angle of 60 degrees or greater
2033 map< double, int >::iterator angle_id = angle2ID.lower_bound( 60. * M_PI / 180. );
2034 if ( angle_id == angle2ID.end() ) angle_id = --angle2ID.end();
2035 const double minAngle = 30. * M_PI / 180.;
2036 const double angle = angle_id->first;
2037 bool angleOK = ( angle > minAngle );
2039 // find points to create a triangle
2040 netgen::Element2d tri(3);
2042 tri[0] = vData.ngId;
2043 tri[1] = vData.ngIdCloseN; // to use the closest nodes
2044 tri[2] = angle_id->second; // to use the node with best angle
2046 // decide whether to use the closest node and the node with best angle or to create new ones
2047 for ( int isBestAngleN = 0; isBestAngleN < 2; ++isBestAngleN )
2049 bool createNew = !angleOK; //, distOK = true;
2051 int triInd = isBestAngleN ? 2 : 1;
2052 mp[isBestAngleN] = ngMesh.Point( tri[triInd] );
2057 double distN2 = sqrt( dist2( mpV, mp[isBestAngleN]));
2058 createNew = ( fabs( distN2 - distN1 ) > 0.25 * distN1 );
2060 else if ( angle < tol )
2062 v2p1.SetX( v2p1.X() + 1e-3 );
2068 double segLenHint = ngMesh.GetH( ngMesh.Point( vData.ngId ));
2069 bool avgLenOK = ( avgSegLen < 0.75 * distN1 );
2070 bool hintLenOK = ( segLenHint < 0.75 * distN1 );
2071 createNew = (createNew || avgLenOK || hintLenOK );
2072 // we create a new node not closer than 0.5 to the closest face
2073 // in order not to clash with other close face
2074 double r = min( 0.5, ( hintLenOK ? segLenHint : avgSegLen ) / distN1 );
2075 distFromV = r * distN1;
2079 // create a new point, between the node and the vertex if angleOK
2080 gp_XYZ p( NGPOINT_COORDS( mp[isBestAngleN] ));
2081 gp_Vec v2p( pV, p ); v2p.Normalize();
2082 if ( isBestAngleN && !angleOK )
2083 p = p1 + gp_Dir( v2p.XYZ() - v2p1.XYZ()).XYZ() * distN1 * 0.95;
2085 p = pV + v2p.XYZ() * distFromV;
2087 if ( !isBestAngleN ) p1 = p, distN1 = distFromV;
2089 mp[isBestAngleN].SetPoint( netgen::Point<3> (p.X(), p.Y(), p.Z()));
2090 ngMesh.AddPoint ( mp[isBestAngleN], 1, netgen::SURFACEPOINT );
2091 tri[triInd] = ngMesh.GetNP();
2092 nodeVec.push_back( helper.AddNode( p.X(), p.Y(), p.Z()) );
2095 ngMesh.AddSurfaceElement (tri);
2096 swap( tri[1], tri[2] );
2097 ngMesh.AddSurfaceElement (tri);
2099 #ifdef DUMP_TRIANGLES_SCRIPT
2100 py << "n1 = m.AddNode( "<< mpV(0)<<", "<< mpV(1)<<", "<< mpV(2)<<") "<< endl
2101 << "n2 = m.AddNode( "<< mp[0](0)<<", "<< mp[0](1)<<", "<< mp[0](2)<<") "<< endl
2102 << "n3 = m.AddNode( "<< mp[1](0)<<", "<< mp[1](1)<<", "<< mp[1](2)<<" )" << endl
2103 << "m.AddFace([n1,n2,n3])" << endl;
2105 } // loop on internal vertices of a solid
2107 } // loop on solids with internal vertices
2110 //================================================================================
2112 * \brief Fill netgen mesh with segments of a FACE
2113 * \param ngMesh - netgen mesh
2114 * \param geom - container of OCCT geometry to mesh
2115 * \param wires - data of nodes on FACE boundary
2116 * \param helper - mesher helper holding the FACE
2117 * \param nodeVec - vector of nodes in which node index == netgen ID
2118 * \retval SMESH_ComputeErrorPtr - error description
2120 //================================================================================
2122 SMESH_ComputeErrorPtr
2123 NETGENPlugin_Mesher::AddSegmentsToMesh(netgen::Mesh& ngMesh,
2124 netgen::OCCGeometry& geom,
2125 const TSideVector& wires,
2126 SMESH_MesherHelper& helper,
2127 vector< const SMDS_MeshNode* > & nodeVec,
2128 const bool overrideMinH)
2130 // ----------------------------
2131 // Check wires and count nodes
2132 // ----------------------------
2134 for ( size_t iW = 0; iW < wires.size(); ++iW )
2136 StdMeshers_FaceSidePtr wire = wires[ iW ];
2137 if ( wire->MissVertexNode() )
2139 // Commented for issue 0020960. It worked for the case, let's wait for case where it doesn't.
2140 // It seems that there is no reason for this limitation
2142 // (new SMESH_ComputeError(COMPERR_BAD_INPUT_MESH, "Missing nodes on vertices"));
2144 const vector<UVPtStruct>& uvPtVec = wire->GetUVPtStruct();
2145 if ((int) uvPtVec.size() != wire->NbPoints() )
2146 return SMESH_ComputeError::New(COMPERR_BAD_INPUT_MESH,
2147 SMESH_Comment("Unexpected nb of points on wire ") << iW
2148 << ": " << uvPtVec.size()<<" != "<<wire->NbPoints());
2149 nbNodes += wire->NbPoints();
2151 nodeVec.reserve( nodeVec.size() + nbNodes + 1 );
2152 if ( nodeVec.empty() )
2153 nodeVec.push_back( 0 );
2155 // -----------------
2157 // -----------------
2159 const bool wasNgMeshEmpty = ( ngMesh.GetNP() < 1 ); /* true => this method is called by
2160 NETGENPlugin_NETGEN_2D_ONLY */
2162 // map for nodes on vertices since they can be shared between wires
2163 // ( issue 0020676, face_int_box.brep) and nodes built by NETGEN
2164 map<const SMDS_MeshNode*, int > node2ngID;
2165 if ( !wasNgMeshEmpty ) // fill node2ngID with nodes built by NETGEN
2167 set< int > subIDs; // ids of sub-shapes of the FACE
2168 for ( size_t iW = 0; iW < wires.size(); ++iW )
2170 StdMeshers_FaceSidePtr wire = wires[ iW ];
2171 for ( int iE = 0, nbE = wire->NbEdges(); iE < nbE; ++iE )
2173 subIDs.insert( wire->EdgeID( iE ));
2174 subIDs.insert( helper.GetMeshDS()->ShapeToIndex( wire->FirstVertex( iE )));
2177 for ( size_t ngID = 1; ngID < nodeVec.size(); ++ngID )
2178 if ( subIDs.count( nodeVec[ngID]->getshapeId() ))
2179 node2ngID.insert( make_pair( nodeVec[ngID], ngID ));
2182 const int solidID = 0, faceID = geom.fmap.FindIndex( helper.GetSubShape() );
2183 if ( ngMesh.GetNFD() < 1 )
2184 ngMesh.AddFaceDescriptor( netgen::FaceDescriptor( faceID, solidID, solidID, 0 ));
2186 for ( size_t iW = 0; iW < wires.size(); ++iW )
2188 StdMeshers_FaceSidePtr wire = wires[ iW ];
2189 const vector<UVPtStruct>& uvPtVec = wire->GetUVPtStruct();
2190 const int nbSegments = wire->NbPoints() - 1;
2192 // assure the 1st node to be in node2ngID, which is needed to correctly
2193 // "close chain of segments" (see below) in case if the 1st node is not
2194 // onVertex because it is on a Viscous layer
2195 node2ngID.insert( make_pair( uvPtVec[ 0 ].node, ngMesh.GetNP() + 1 ));
2197 // compute length of every segment
2198 vector<double> segLen( nbSegments );
2199 for ( int i = 0; i < nbSegments; ++i )
2200 segLen[i] = SMESH_TNodeXYZ( uvPtVec[ i ].node ).Distance( uvPtVec[ i+1 ].node );
2202 int edgeID = 1, posID = -2;
2203 bool isInternalWire = false;
2204 double vertexNormPar = 0;
2205 const int prevNbNGSeg = ngMesh.GetNSeg();
2206 for ( int i = 0; i < nbSegments; ++i ) // loop on segments
2208 // Add the first point of a segment
2210 const SMDS_MeshNode * n = uvPtVec[ i ].node;
2211 const int posShapeID = n->getshapeId();
2212 bool onVertex = ( n->GetPosition()->GetTypeOfPosition() == SMDS_TOP_VERTEX );
2213 bool onEdge = ( n->GetPosition()->GetTypeOfPosition() == SMDS_TOP_EDGE );
2215 // skip nodes on degenerated edges
2216 if ( helper.IsDegenShape( posShapeID ) &&
2217 helper.IsDegenShape( uvPtVec[ i+1 ].node->getshapeId() ))
2220 int ngID1 = ngMesh.GetNP() + 1, ngID2 = ngID1+1;
2221 if ( onVertex || ( !wasNgMeshEmpty && onEdge ) || helper.IsRealSeam( posShapeID ))
2222 ngID1 = node2ngID.insert( make_pair( n, ngID1 )).first->second;
2223 if ( ngID1 > ngMesh.GetNP() )
2225 netgen::MeshPoint mp( netgen::Point<3> (n->X(), n->Y(), n->Z()) );
2226 ngMesh.AddPoint ( mp, 1, netgen::EDGEPOINT );
2227 nodeVec.push_back( n );
2229 else // n is in ngMesh already, and ngID2 in prev segment is wrong
2231 ngID2 = ngMesh.GetNP() + 1;
2232 if ( i > 0 ) // prev segment belongs to same wire
2234 netgen::Segment& prevSeg = ngMesh.LineSegment( ngMesh.GetNSeg() );
2241 netgen::Segment seg;
2243 seg[0] = ngID1; // ng node id
2244 seg[1] = ngID2; // ng node id
2245 seg.edgenr = ngMesh.GetNSeg() + 1; // ng segment id
2246 seg.si = faceID; // = geom.fmap.FindIndex (face);
2248 for ( int iEnd = 0; iEnd < 2; ++iEnd)
2250 const UVPtStruct& pnt = uvPtVec[ i + iEnd ];
2252 seg.epgeominfo[ iEnd ].dist = pnt.param; // param on curve
2253 seg.epgeominfo[ iEnd ].u = pnt.u;
2254 seg.epgeominfo[ iEnd ].v = pnt.v;
2256 // find out edge id and node parameter on edge
2257 onVertex = ( pnt.normParam + 1e-10 > vertexNormPar );
2258 if ( onVertex || posShapeID != posID )
2261 double normParam = pnt.normParam;
2263 normParam = 0.5 * ( uvPtVec[ i ].normParam + uvPtVec[ i+1 ].normParam );
2264 int edgeIndexInWire = wire->EdgeIndex( normParam );
2265 vertexNormPar = wire->LastParameter( edgeIndexInWire );
2266 const TopoDS_Edge& edge = wire->Edge( edgeIndexInWire );
2267 edgeID = geom.emap.FindIndex( edge );
2269 isInternalWire = ( edge.Orientation() == TopAbs_INTERNAL );
2270 // if ( onVertex ) // param on curve is different on each of two edges
2271 // seg.epgeominfo[ iEnd ].dist = helper.GetNodeU( edge, pnt.node );
2273 seg.epgeominfo[ iEnd ].edgenr = edgeID; // = geom.emap.FindIndex(edge);
2276 ngMesh.AddSegment (seg);
2278 // restrict size of elements near the segment
2279 SMESH_TNodeXYZ np1( n ), np2( uvPtVec[ i+1 ].node );
2280 // get an average size of adjacent segments to avoid sharp change of
2281 // element size (regression on issue 0020452, note 0010898)
2282 int iPrev = SMESH_MesherHelper::WrapIndex( i-1, nbSegments );
2283 int iNext = SMESH_MesherHelper::WrapIndex( i+1, nbSegments );
2284 double sumH = segLen[ iPrev ] + segLen[ i ] + segLen[ iNext ];
2285 int nbSeg = ( int( segLen[ iPrev ] > sumH / 100.) +
2286 int( segLen[ i ] > sumH / 100.) +
2287 int( segLen[ iNext ] > sumH / 100.));
2289 RestrictLocalSize( ngMesh, 0.5*(np1+np2), sumH / nbSeg, overrideMinH );
2291 if ( isInternalWire )
2293 swap (seg[0], seg[1]);
2294 swap( seg.epgeominfo[0], seg.epgeominfo[1] );
2295 seg.edgenr = ngMesh.GetNSeg() + 1; // segment id
2296 ngMesh.AddSegment (seg);
2298 } // loop on segments on a wire
2300 // close chain of segments
2301 if ( nbSegments > 0 )
2303 netgen::Segment& lastSeg = ngMesh.LineSegment( ngMesh.GetNSeg() - int( isInternalWire ));
2304 const SMDS_MeshNode * lastNode = uvPtVec.back().node;
2305 lastSeg[1] = node2ngID.insert( make_pair( lastNode, lastSeg[1] )).first->second;
2306 if ( lastSeg[1] > ngMesh.GetNP() )
2308 netgen::MeshPoint mp( netgen::Point<3> (lastNode->X(), lastNode->Y(), lastNode->Z()) );
2309 ngMesh.AddPoint ( mp, 1, netgen::EDGEPOINT );
2310 nodeVec.push_back( lastNode );
2312 if ( isInternalWire )
2314 netgen::Segment& realLastSeg = ngMesh.LineSegment( ngMesh.GetNSeg() );
2315 realLastSeg[0] = lastSeg[1];
2319 #ifdef DUMP_SEGMENTS
2320 cout << "BEGIN WIRE " << iW << endl;
2321 for ( int i = prevNbNGSeg+1; i <= ngMesh.GetNSeg(); ++i )
2323 netgen::Segment& seg = ngMesh.LineSegment( i );
2325 netgen::Segment& prevSeg = ngMesh.LineSegment( i-1 );
2326 if ( seg[0] == prevSeg[1] && seg[1] == prevSeg[0] )
2328 cout << "Segment: " << seg.edgenr << endl << "\tis REVERSE of the previous one" << endl;
2332 cout << "Segment: " << seg.edgenr << endl
2333 << "\tp1: " << seg[0] << " n" << nodeVec[ seg[0]]->GetID() << endl
2334 << "\tp2: " << seg[1] << " n" << nodeVec[ seg[1]]->GetID() << endl
2335 << "\tp0 param: " << seg.epgeominfo[ 0 ].dist << endl
2336 << "\tp0 uv: " << seg.epgeominfo[ 0 ].u <<", "<< seg.epgeominfo[ 0 ].v << endl
2337 << "\tp0 edge: " << seg.epgeominfo[ 0 ].edgenr << endl
2338 << "\tp1 param: " << seg.epgeominfo[ 1 ].dist << endl
2339 << "\tp1 uv: " << seg.epgeominfo[ 1 ].u <<", "<< seg.epgeominfo[ 1 ].v << endl
2340 << "\tp1 edge: " << seg.epgeominfo[ 1 ].edgenr << endl;
2342 cout << "--END WIRE " << iW << endl;
2344 SMESH_Comment __not_unused_variable( prevNbNGSeg );
2347 } // loop on WIREs of a FACE
2349 // add a segment instead of an internal vertex
2350 if ( wasNgMeshEmpty )
2352 NETGENPlugin_Internals intShapes( *helper.GetMesh(), helper.GetSubShape(), /*is3D=*/false );
2353 AddIntVerticesInFaces( geom, ngMesh, nodeVec, intShapes );
2355 ngMesh.CalcSurfacesOfNode();
2360 //================================================================================
2362 * \brief Fill SMESH mesh according to contents of netgen mesh
2363 * \param occgeo - container of OCCT geometry to mesh
2364 * \param ngMesh - netgen mesh
2365 * \param initState - bn of entities in netgen mesh before computing
2366 * \param sMesh - SMESH mesh to fill in
2367 * \param nodeVec - vector of nodes in which node index == netgen ID
2368 * \param comment - returns problem description
2369 * \param quadHelper - holder of medium nodes of sub-meshes
2370 * \retval int - error
2372 //================================================================================
2374 int NETGENPlugin_Mesher::FillSMesh(const netgen::OCCGeometry& occgeo,
2375 netgen::Mesh& ngMesh,
2376 const NETGENPlugin_ngMeshInfo& initState,
2378 std::vector<const SMDS_MeshNode*>& nodeVec,
2379 SMESH_Comment& comment,
2380 SMESH_MesherHelper* quadHelper)
2382 int nbNod = ngMesh.GetNP();
2383 int nbSeg = ngMesh.GetNSeg();
2384 int nbFac = ngMesh.GetNSE();
2385 int nbVol = ngMesh.GetNE();
2387 SMESHDS_Mesh* meshDS = sMesh.GetMeshDS();
2389 // quadHelper is used for either
2390 // 1) making quadratic elements when a lower dimension mesh is loaded
2391 // to SMESH before conversion to quadratic by NETGEN
2392 // 2) sewing of quadratic elements with quadratic elements of sub-meshes
2393 if ( quadHelper && !quadHelper->GetIsQuadratic() && quadHelper->GetTLinkNodeMap().empty() )
2396 int i, nbInitNod = initState._nbNodes;
2397 if ( initState._elementsRemoved )
2399 // PAL23427. Update nodeVec to track removal of netgen free points as a result
2400 // of removal of faces in FillNgMesh() in the case of a shrunk sub-mesh
2401 int ngID, nodeVecSize = nodeVec.size();
2402 const double eps = std::numeric_limits<double>::min();
2403 for ( ngID = i = 1; i < nodeVecSize; ++ngID, ++i )
2405 gp_Pnt ngPnt( NGPOINT_COORDS( ngMesh.Point( ngID )));
2406 gp_Pnt node ( SMESH_NodeXYZ (nodeVec_ACCESS(i) ));
2407 if ( ngPnt.SquareDistance( node ) < eps )
2409 nodeVec[ ngID ] = nodeVec[ i ];
2416 nodeVec.resize( ngID );
2417 nbInitNod = ngID - 1;
2419 // -------------------------------------
2420 // Create and insert nodes into nodeVec
2421 // -------------------------------------
2423 nodeVec.resize( nbNod + 1 );
2424 for ( i = nbInitNod+1; i <= nbNod; ++i )
2426 const netgen::MeshPoint& ngPoint = ngMesh.Point(i);
2427 SMDS_MeshNode* node = NULL;
2428 TopoDS_Vertex aVert;
2429 // First, netgen creates nodes on vertices in occgeo.vmap,
2430 // so node index corresponds to vertex index
2431 // but (issue 0020776) netgen does not create nodes with equal coordinates
2432 if ( i-nbInitNod <= occgeo.vmap.Extent() )
2434 gp_Pnt p ( NGPOINT_COORDS(ngPoint) );
2435 for (int iV = i-nbInitNod; aVert.IsNull() && iV <= occgeo.vmap.Extent(); ++iV)
2437 aVert = TopoDS::Vertex( occgeo.vmap( iV ));
2438 gp_Pnt pV = BRep_Tool::Pnt( aVert );
2439 if ( p.SquareDistance( pV ) > 1e-20 )
2442 node = const_cast<SMDS_MeshNode*>( SMESH_Algo::VertexNode( aVert, meshDS ));
2445 if (!node) // node not found on vertex
2447 node = meshDS->AddNode( NGPOINT_COORDS( ngPoint ));
2448 if (!aVert.IsNull())
2449 meshDS->SetNodeOnVertex(node, aVert);
2454 // -------------------------------------------
2455 // Create mesh segments along geometric edges
2456 // -------------------------------------------
2458 int nbInitSeg = initState._nbSegments;
2459 for (i = nbInitSeg+1; i <= nbSeg; ++i )
2461 const netgen::Segment& seg = ngMesh.LineSegment(i);
2463 int pinds[3] = { seg.pnums[0], seg.pnums[1], seg.pnums[2] };
2466 for (int j=0; j < 3; ++j)
2468 int pind = pinds[j];
2469 if (pind <= 0 || !nodeVec_ACCESS(pind))
2477 int aGeomEdgeInd = seg.epgeominfo[j].edgenr;
2478 if (aGeomEdgeInd > 0 && aGeomEdgeInd <= occgeo.emap.Extent())
2479 aEdge = TopoDS::Edge(occgeo.emap(aGeomEdgeInd));
2481 param = seg.epgeominfo[j].dist;
2484 else // middle point
2486 param = param2 * 0.5;
2488 if (!aEdge.IsNull() && nodeVec_ACCESS(pind)->getshapeId() < 1)
2490 meshDS->SetNodeOnEdge(nodeVec_ACCESS(pind), aEdge, param);
2495 SMDS_MeshEdge* edge = 0;
2496 if (nbp == 2) // second order ?
2498 if ( meshDS->FindEdge( nodeVec_ACCESS(pinds[0]), nodeVec_ACCESS(pinds[1])))
2500 if ( quadHelper ) // final mesh must be quadratic
2501 edge = quadHelper->AddEdge(nodeVec_ACCESS(pinds[0]), nodeVec_ACCESS(pinds[1]));
2503 edge = meshDS->AddEdge(nodeVec_ACCESS(pinds[0]), nodeVec_ACCESS(pinds[1]));
2507 if ( meshDS->FindEdge( nodeVec_ACCESS(pinds[0]), nodeVec_ACCESS(pinds[1]),
2508 nodeVec_ACCESS(pinds[2])))
2510 edge = meshDS->AddEdge(nodeVec_ACCESS(pinds[0]), nodeVec_ACCESS(pinds[1]),
2511 nodeVec_ACCESS(pinds[2]));
2515 if ( comment.empty() ) comment << "Cannot create a mesh edge";
2516 MESSAGE("Cannot create a mesh edge");
2517 nbSeg = nbFac = nbVol = 0;
2520 if ( !aEdge.IsNull() && edge->getshapeId() < 1 )
2521 meshDS->SetMeshElementOnShape(edge, aEdge);
2523 else if ( comment.empty() )
2525 comment << "Invalid netgen segment #" << i;
2529 // ----------------------------------------
2530 // Create mesh faces along geometric faces
2531 // ----------------------------------------
2533 int nbInitFac = initState._nbFaces;
2534 int quadFaceID = ngMesh.GetNFD() + 1;
2535 if ( nbInitFac < nbFac )
2536 // add a faces descriptor to exclude qudrangle elements generated by NETGEN
2537 // from computation of 3D mesh
2538 ngMesh.AddFaceDescriptor (netgen::FaceDescriptor(quadFaceID, /*solid1=*/0, /*solid2=*/0, 0));
2540 vector<const SMDS_MeshNode*> nodes;
2541 for (i = nbInitFac+1; i <= nbFac; ++i )
2543 const netgen::Element2d& elem = ngMesh.SurfaceElement(i);
2544 const int aGeomFaceInd = elem.GetIndex();
2546 if (aGeomFaceInd > 0 && aGeomFaceInd <= occgeo.fmap.Extent())
2547 aFace = TopoDS::Face(occgeo.fmap(aGeomFaceInd));
2549 for ( int j = 1; j <= elem.GetNP(); ++j )
2551 int pind = elem.PNum(j);
2552 if ( pind < 1 || pind >= (int) nodeVec.size() )
2554 if ( SMDS_MeshNode* node = nodeVec_ACCESS(pind))
2556 nodes.push_back( node );
2557 if (!aFace.IsNull() && node->getshapeId() < 1)
2559 const netgen::PointGeomInfo& pgi = elem.GeomInfoPi(j);
2560 meshDS->SetNodeOnFace(node, aFace, pgi.u, pgi.v);
2564 if ((int) nodes.size() != elem.GetNP() )
2566 if ( comment.empty() )
2567 comment << "Invalid netgen 2d element #" << i;
2568 continue; // bad node ids
2570 SMDS_MeshFace* face = NULL;
2571 switch (elem.GetType())
2574 if ( quadHelper ) // final mesh must be quadratic
2575 face = quadHelper->AddFace(nodes[0],nodes[1],nodes[2]);
2577 face = meshDS->AddFace(nodes[0],nodes[1],nodes[2]);
2580 if ( quadHelper ) // final mesh must be quadratic
2581 face = quadHelper->AddFace(nodes[0],nodes[1],nodes[2],nodes[3]);
2583 face = meshDS->AddFace(nodes[0],nodes[1],nodes[2],nodes[3]);
2584 // exclude qudrangle elements from computation of 3D mesh
2585 const_cast< netgen::Element2d& >( elem ).SetIndex( quadFaceID );
2588 nodes[5] = mediumNode( nodes[0],nodes[1],nodes[5], quadHelper );
2589 nodes[3] = mediumNode( nodes[1],nodes[2],nodes[3], quadHelper );
2590 nodes[4] = mediumNode( nodes[2],nodes[0],nodes[4], quadHelper );
2591 face = meshDS->AddFace(nodes[0],nodes[1],nodes[2],nodes[5],nodes[3],nodes[4]);
2594 nodes[4] = mediumNode( nodes[0],nodes[1],nodes[4], quadHelper );
2595 nodes[7] = mediumNode( nodes[1],nodes[2],nodes[7], quadHelper );
2596 nodes[5] = mediumNode( nodes[2],nodes[3],nodes[5], quadHelper );
2597 nodes[6] = mediumNode( nodes[3],nodes[0],nodes[6], quadHelper );
2598 face = meshDS->AddFace(nodes[0],nodes[1],nodes[2],nodes[3],
2599 nodes[4],nodes[7],nodes[5],nodes[6]);
2600 // exclude qudrangle elements from computation of 3D mesh
2601 const_cast< netgen::Element2d& >( elem ).SetIndex( quadFaceID );
2604 MESSAGE("NETGEN created a face of unexpected type, ignoring");
2609 if ( comment.empty() ) comment << "Cannot create a mesh face";
2610 MESSAGE("Cannot create a mesh face");
2611 nbSeg = nbFac = nbVol = 0;
2614 if ( !aFace.IsNull() )
2615 meshDS->SetMeshElementOnShape( face, aFace );
2618 // ------------------
2619 // Create tetrahedra
2620 // ------------------
2622 for ( i = 1; i <= nbVol; ++i )
2624 const netgen::Element& elem = ngMesh.VolumeElement(i);
2625 int aSolidInd = elem.GetIndex();
2626 TopoDS_Solid aSolid;
2627 if ( aSolidInd > 0 && aSolidInd <= occgeo.somap.Extent() )
2628 aSolid = TopoDS::Solid(occgeo.somap(aSolidInd));
2630 for ( int j = 1; j <= elem.GetNP(); ++j )
2632 int pind = elem.PNum(j);
2633 if ( pind < 1 || pind >= (int)nodeVec.size() )
2635 if ( SMDS_MeshNode* node = nodeVec_ACCESS(pind) )
2637 nodes.push_back(node);
2638 if ( !aSolid.IsNull() && node->getshapeId() < 1 )
2639 meshDS->SetNodeInVolume(node, aSolid);
2642 if ((int) nodes.size() != elem.GetNP() )
2644 if ( comment.empty() )
2645 comment << "Invalid netgen 3d element #" << i;
2648 SMDS_MeshVolume* vol = NULL;
2649 switch ( elem.GetType() )
2652 vol = meshDS->AddVolume(nodes[0],nodes[1],nodes[2],nodes[3]);
2655 nodes[4] = mediumNode( nodes[0],nodes[1],nodes[4], quadHelper );
2656 nodes[7] = mediumNode( nodes[1],nodes[2],nodes[7], quadHelper );
2657 nodes[5] = mediumNode( nodes[2],nodes[0],nodes[5], quadHelper );
2658 nodes[6] = mediumNode( nodes[0],nodes[3],nodes[6], quadHelper );
2659 nodes[8] = mediumNode( nodes[1],nodes[3],nodes[8], quadHelper );
2660 nodes[9] = mediumNode( nodes[2],nodes[3],nodes[9], quadHelper );
2661 vol = meshDS->AddVolume(nodes[0],nodes[1],nodes[2],nodes[3],
2662 nodes[4],nodes[7],nodes[5],nodes[6],nodes[8],nodes[9]);
2665 MESSAGE("NETGEN created a volume of unexpected type, ignoring");
2670 if ( comment.empty() ) comment << "Cannot create a mesh volume";
2671 MESSAGE("Cannot create a mesh volume");
2672 nbSeg = nbFac = nbVol = 0;
2675 if (!aSolid.IsNull())
2676 meshDS->SetMeshElementOnShape(vol, aSolid);
2678 return comment.empty() ? 0 : 1;
2683 //================================================================================
2685 * \brief Convert error into text
2687 //================================================================================
2689 std::string text(int err)
2694 SMESH_Comment("Error in netgen::OCCGenerateMesh() at ") << netgen::multithread.task;
2697 //================================================================================
2699 * \brief Convert exception into text
2701 //================================================================================
2703 std::string text(Standard_Failure& ex)
2705 SMESH_Comment str("Exception in netgen::OCCGenerateMesh()");
2706 str << " at " << netgen::multithread.task
2707 << ": " << ex.DynamicType()->Name();
2708 if ( ex.GetMessageString() && strlen( ex.GetMessageString() ))
2709 str << ": " << ex.GetMessageString();
2712 //================================================================================
2714 * \brief Convert exception into text
2716 //================================================================================
2718 std::string text(netgen::NgException& ex)
2720 SMESH_Comment str("NgException");
2721 if ( strlen( netgen::multithread.task ) > 0 )
2722 str << " at " << netgen::multithread.task;
2723 str << ": " << ex.What();
2727 //================================================================================
2729 * \brief Looks for triangles lying on a SOLID
2731 //================================================================================
2733 bool hasBadElemOnSolid( const list<const SMDS_MeshElement*>& elems,
2734 SMESH_subMesh* solidSM )
2736 TopTools_IndexedMapOfShape solidSubs;
2737 TopExp::MapShapes( solidSM->GetSubShape(), solidSubs );
2738 SMESHDS_Mesh* mesh = solidSM->GetFather()->GetMeshDS();
2740 list<const SMDS_MeshElement*>::const_iterator e = elems.begin();
2741 for ( ; e != elems.end(); ++e )
2743 const SMDS_MeshElement* elem = *e;
2744 // if ( elem->GetType() != SMDSAbs_Face ) -- 23047
2746 int nbNodesOnSolid = 0, nbNodes = elem->NbNodes();
2747 SMDS_NodeIteratorPtr nIt = elem->nodeIterator();
2748 while ( nIt->more() )
2750 const SMDS_MeshNode* n = nIt->next();
2751 const TopoDS_Shape& s = mesh->IndexToShape( n->getshapeId() );
2752 nbNodesOnSolid += ( !s.IsNull() && solidSubs.Contains( s ));
2753 if ( nbNodesOnSolid > 2 ||
2754 nbNodesOnSolid == nbNodes)
2761 const double edgeMeshingTime = 0.001;
2762 const double faceMeshingTime = 0.019;
2763 const double edgeFaceMeshingTime = edgeMeshingTime + faceMeshingTime;
2764 const double faceOptimizTime = 0.06;
2765 const double voluMeshingTime = 0.15;
2766 const double volOptimizeTime = 0.77;
2769 //=============================================================================
2771 * Here we are going to use the NETGEN mesher
2773 //=============================================================================
2775 bool NETGENPlugin_Mesher::Compute()
2777 NETGENPlugin_NetgenLibWrapper ngLib;
2779 netgen::MeshingParameters& mparams = netgen::mparam;
2781 SMESH_ComputeErrorPtr error = SMESH_ComputeError::New();
2782 SMESH_MesherHelper quadHelper( *_mesh );
2783 quadHelper.SetIsQuadratic( mparams.secondorder );
2785 // -------------------------
2786 // Prepare OCC geometry
2787 // -------------------------
2789 netgen::OCCGeometry occgeo;
2790 list< SMESH_subMesh* > meshedSM[3]; // for 0-2 dimensions
2791 NETGENPlugin_Internals internals( *_mesh, _shape, _isVolume );
2792 PrepareOCCgeometry( occgeo, _shape, *_mesh, meshedSM, &internals );
2795 _totalTime = edgeFaceMeshingTime;
2797 _totalTime += faceOptimizTime;
2799 _totalTime += voluMeshingTime + ( _optimize ? volOptimizeTime : 0 );
2800 double doneTime = 0;
2803 _curShapeIndex = -1;
2805 // -------------------------
2806 // Generate the mesh
2807 // -------------------------
2810 NETGENPlugin_ngMeshInfo initState; // it remembers size of ng mesh equal to size of Smesh
2812 SMESH_Comment comment;
2815 // vector of nodes in which node index == netgen ID
2816 vector< const SMDS_MeshNode* > nodeVec;
2824 // not to RestrictLocalH() according to curvature during MESHCONST_ANALYSE
2825 mparams.uselocalh = false;
2826 mparams.grading = 0.8; // not limitited size growth
2828 if ( _simpleHyp->GetNumberOfSegments() )
2830 mparams.maxh = occgeo.boundingbox.Diam();
2833 mparams.maxh = _simpleHyp->GetLocalLength();
2836 if ( mparams.maxh == 0.0 )
2837 mparams.maxh = occgeo.boundingbox.Diam();
2838 if ( _simpleHyp || ( mparams.minh == 0.0 && _fineness != NETGENPlugin_Hypothesis::UserDefined))
2839 mparams.minh = GetDefaultMinSize( _shape, mparams.maxh );
2841 // Local size on faces
2842 occgeo.face_maxh = mparams.maxh;
2844 // Let netgen create _ngMesh and calculate element size on not meshed shapes
2848 int startWith = netgen::MESHCONST_ANALYSE;
2849 int endWith = netgen::MESHCONST_ANALYSE;
2854 err = netgen::OCCGenerateMesh(occgeo, _ngMesh, mparams, startWith, endWith);
2856 err = netgen::OCCGenerateMesh(occgeo, _ngMesh, startWith, endWith, optstr);
2858 if(netgen::multithread.terminate)
2861 comment << text(err);
2863 catch (Standard_Failure& ex)
2865 comment << text(ex);
2867 catch (netgen::NgException & ex)
2869 comment << text(ex);
2870 if ( mparams.meshsizefilename )
2871 throw SMESH_ComputeError(COMPERR_BAD_PARMETERS, comment );
2873 err = 0; //- MESHCONST_ANALYSE isn't so important step
2876 ngLib.setMesh(( Ng_Mesh*) _ngMesh );
2878 _ngMesh->ClearFaceDescriptors(); // we make descriptors our-self
2880 if ( !mparams.uselocalh ) // mparams.grading is not taken into account yet
2881 _ngMesh->LocalHFunction().SetGrading( mparams.grading );
2885 // Pass 1D simple parameters to NETGEN
2886 // --------------------------------
2887 int nbSeg = _simpleHyp->GetNumberOfSegments();
2888 double segSize = _simpleHyp->GetLocalLength();
2889 for ( int iE = 1; iE <= occgeo.emap.Extent(); ++iE )
2891 const TopoDS_Edge& e = TopoDS::Edge( occgeo.emap(iE));
2893 segSize = SMESH_Algo::EdgeLength( e ) / ( nbSeg - 0.4 );
2894 setLocalSize( e, segSize, *_ngMesh );
2897 else // if ( ! _simpleHyp )
2899 // Local size on shapes
2900 SetLocalSize( occgeo, *_ngMesh );
2901 SetLocalSizeForChordalError( occgeo, *_ngMesh );
2904 // Precompute internal edges (issue 0020676) in order to
2905 // add mesh on them correctly (twice) to netgen mesh
2906 if ( !err && internals.hasInternalEdges() )
2908 // load internal shapes into OCCGeometry
2909 netgen::OCCGeometry intOccgeo;
2910 internals.getInternalEdges( intOccgeo.fmap, intOccgeo.emap, intOccgeo.vmap, meshedSM );
2911 intOccgeo.boundingbox = occgeo.boundingbox;
2912 intOccgeo.shape = occgeo.shape;
2913 intOccgeo.face_maxh.SetSize(intOccgeo.fmap.Extent());
2914 intOccgeo.face_maxh = netgen::mparam.maxh;
2915 netgen::Mesh *tmpNgMesh = NULL;
2919 // compute local H on internal shapes in the main mesh
2920 //OCCSetLocalMeshSize(intOccgeo, *_ngMesh); it deletes _ngMesh->localH
2922 // let netgen create a temporary mesh
2924 netgen::OCCGenerateMesh(intOccgeo, tmpNgMesh, mparams, startWith, endWith);
2926 netgen::OCCGenerateMesh(intOccgeo, tmpNgMesh, startWith, endWith, optstr);
2928 if(netgen::multithread.terminate)
2931 // copy LocalH from the main to temporary mesh
2932 initState.transferLocalH( _ngMesh, tmpNgMesh );
2934 // compute mesh on internal edges
2935 startWith = endWith = netgen::MESHCONST_MESHEDGES;
2937 err = netgen::OCCGenerateMesh(intOccgeo, tmpNgMesh, mparams, startWith, endWith);
2939 err = netgen::OCCGenerateMesh(intOccgeo, tmpNgMesh, startWith, endWith, optstr);
2941 comment << text(err);
2943 catch (Standard_Failure& ex)
2945 comment << text(ex);
2948 initState.restoreLocalH( tmpNgMesh );
2950 // fill SMESH by netgen mesh
2951 vector< const SMDS_MeshNode* > tmpNodeVec;
2952 FillSMesh( intOccgeo, *tmpNgMesh, initState, *_mesh, tmpNodeVec, comment );
2953 err = ( err || !comment.empty() );
2955 nglib::Ng_DeleteMesh((nglib::Ng_Mesh*)tmpNgMesh);
2958 // Fill _ngMesh with nodes and segments of computed submeshes
2961 err = ! ( FillNgMesh(occgeo, *_ngMesh, nodeVec, meshedSM[ MeshDim_0D ]) &&
2962 FillNgMesh(occgeo, *_ngMesh, nodeVec, meshedSM[ MeshDim_1D ], &quadHelper));
2964 initState = NETGENPlugin_ngMeshInfo(_ngMesh);
2969 startWith = endWith = netgen::MESHCONST_MESHEDGES;
2974 err = netgen::OCCGenerateMesh(occgeo, _ngMesh, mparams, startWith, endWith);
2976 err = netgen::OCCGenerateMesh(occgeo, _ngMesh, startWith, endWith, optstr);
2978 if(netgen::multithread.terminate)
2981 comment << text(err);
2983 catch (Standard_Failure& ex)
2985 comment << text(ex);
2990 _ticTime = ( doneTime += edgeMeshingTime ) / _totalTime / _progressTic;
2992 mparams.uselocalh = true; // restore as it is used at surface optimization
2994 // ---------------------
2995 // compute surface mesh
2996 // ---------------------
2999 // Pass 2D simple parameters to NETGEN
3001 if ( double area = _simpleHyp->GetMaxElementArea() ) {
3003 mparams.maxh = sqrt(2. * area/sqrt(3.0));
3004 mparams.grading = 0.4; // moderate size growth
3007 // length from edges
3008 if ( _ngMesh->GetNSeg() ) {
3009 double edgeLength = 0;
3010 TopTools_MapOfShape visitedEdges;
3011 for ( TopExp_Explorer exp( _shape, TopAbs_EDGE ); exp.More(); exp.Next() )
3012 if( visitedEdges.Add(exp.Current()) )
3013 edgeLength += SMESH_Algo::EdgeLength( TopoDS::Edge( exp.Current() ));
3014 // we have to multiply length by 2 since for each TopoDS_Edge there
3015 // are double set of NETGEN edges, in other words, we have to
3016 // divide _ngMesh->GetNSeg() by 2.
3017 mparams.maxh = 2*edgeLength / _ngMesh->GetNSeg();
3020 mparams.maxh = 1000;
3022 mparams.grading = 0.2; // slow size growth
3024 mparams.quad = _simpleHyp->GetAllowQuadrangles();
3025 mparams.maxh = min( mparams.maxh, occgeo.boundingbox.Diam()/2 );
3026 _ngMesh->SetGlobalH (mparams.maxh);
3027 netgen::Box<3> bb = occgeo.GetBoundingBox();
3028 bb.Increase (bb.Diam()/20);
3029 _ngMesh->SetLocalH (bb.PMin(), bb.PMax(), mparams.grading);
3032 // Care of vertices internal in faces (issue 0020676)
3033 if ( internals.hasInternalVertexInFace() )
3035 // store computed segments in SMESH in order not to create SMESH
3036 // edges for ng segments added by AddIntVerticesInFaces()
3037 FillSMesh( occgeo, *_ngMesh, initState, *_mesh, nodeVec, comment );
3038 // add segments to faces with internal vertices
3039 AddIntVerticesInFaces( occgeo, *_ngMesh, nodeVec, internals );
3040 initState = NETGENPlugin_ngMeshInfo(_ngMesh);
3043 // Build viscous layers
3044 if (( _isViscousLayers2D ) ||
3045 ( !occgeo.fmap.IsEmpty() &&
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 previous error
3219 comment << text(err);
3221 catch (Standard_Failure& ex)
3223 if ( comment.empty() ) // do not overwrite a previous error
3224 comment << text(ex);
3227 catch (netgen::NgException exc)
3229 if ( comment.empty() ) // do not overwrite a previous 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 previous error
3251 comment << text(err);
3253 catch (Standard_Failure& ex)
3255 if ( comment.empty() ) // do not overwrite a previous error
3256 comment << text(ex);
3258 catch (netgen::NgException exc)
3260 if ( comment.empty() ) // do not overwrite a previous 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 )
3278 _ngMesh->DeleteSegment( i );
3279 initState._nbSegments--;
3282 _ngMesh->Compress();
3284 // convert to quadratic
3285 netgen::OCCRefinementSurfaces ref (occgeo);
3286 ref.MakeSecondOrder (*_ngMesh);
3288 // care of elements already loaded to SMESH
3289 // if ( initState._nbSegments > 0 )
3290 // makeQuadratic( occgeo.emap, _mesh );
3291 // if ( initState._nbFaces > 0 )
3292 // makeQuadratic( occgeo.fmap, _mesh );
3294 catch (Standard_Failure& ex)
3296 if ( comment.empty() ) // do not overwrite a previous error
3297 comment << "Exception in netgen at passing to 2nd order ";
3299 catch (netgen::NgException exc)
3301 if ( comment.empty() ) // do not overwrite a previous error
3302 comment << exc.What();
3307 _ticTime = 0.98 / _progressTic;
3309 //int nbNod = _ngMesh->GetNP();
3310 //int nbSeg = _ngMesh->GetNSeg();
3311 int nbFac = _ngMesh->GetNSE();
3312 int nbVol = _ngMesh->GetNE();
3313 bool isOK = ( !err && (_isVolume ? (nbVol > 0) : (nbFac > 0)) );
3315 // Feed back the SMESHDS with the generated Nodes and Elements
3316 if ( true /*isOK*/ ) // get whatever built
3318 FillSMesh( occgeo, *_ngMesh, initState, *_mesh, nodeVec, comment, &quadHelper );
3320 if ( quadHelper.GetIsQuadratic() ) // remove free nodes
3322 for ( size_t i = 0; i < nodeVec.size(); ++i )
3323 if ( nodeVec[i] && nodeVec[i]->NbInverseElements() == 0 )
3325 _mesh->GetMeshDS()->RemoveFreeNode( nodeVec[i], 0, /*fromGroups=*/false );
3328 for ( size_t i = nodeVec.size()-1; i > 0; --i ) // remove trailing removed nodes
3330 nodeVec.resize( i );
3335 SMESH_ComputeErrorPtr readErr = ReadErrors(nodeVec);
3336 if ( readErr && readErr->HasBadElems() )
3339 if ( !comment.empty() && !readErr->myComment.empty() ) comment += "\n";
3340 comment += readErr->myComment;
3342 if ( error->IsOK() && ( !isOK || comment.size() > 0 ))
3343 error->myName = COMPERR_ALGO_FAILED;
3344 if ( !comment.empty() )
3345 error->myComment = comment;
3347 // SetIsAlwaysComputed( true ) to empty sub-meshes, which
3348 // appear if the geometry contains coincident sub-shape due
3349 // to bool merge_solids = 1; in netgen/libsrc/occ/occgenmesh.cpp
3350 const int nbMaps = 2;
3351 const TopTools_IndexedMapOfShape* geoMaps[nbMaps] =
3352 { & occgeo.vmap, & occgeo.emap/*, & occgeo.fmap*/ };
3353 for ( int iMap = 0; iMap < nbMaps; ++iMap )
3354 for (int i = 1; i <= geoMaps[iMap]->Extent(); i++)
3355 if ( SMESH_subMesh* sm = _mesh->GetSubMeshContaining( geoMaps[iMap]->FindKey(i)))
3356 if ( !sm->IsMeshComputed() )
3357 sm->SetIsAlwaysComputed( true );
3359 // set bad compute error to subshapes of all failed sub-shapes
3360 if ( !error->IsOK() )
3362 bool pb2D = false, pb3D = false;
3363 for (int i = 1; i <= occgeo.fmap.Extent(); i++) {
3364 int status = occgeo.facemeshstatus[i-1];
3365 if (status == netgen::FACE_MESHED_OK ) continue;
3366 if ( SMESH_subMesh* sm = _mesh->GetSubMeshContaining( occgeo.fmap( i ))) {
3367 SMESH_ComputeErrorPtr& smError = sm->GetComputeError();
3368 if ( !smError || smError->IsOK() ) {
3369 if ( status == netgen::FACE_FAILED )
3370 smError.reset( new SMESH_ComputeError( *error ));
3372 smError.reset( new SMESH_ComputeError( COMPERR_ALGO_FAILED, "Ignored" ));
3373 if ( SMESH_Algo::GetMeshError( sm ) == SMESH_Algo::MEr_OK )
3374 smError->myName = COMPERR_WARNING;
3376 pb2D = pb2D || smError->IsKO();
3379 if ( !pb2D ) // all faces are OK
3380 for (int i = 1; i <= occgeo.somap.Extent(); i++)
3381 if ( SMESH_subMesh* sm = _mesh->GetSubMeshContaining( occgeo.somap( i )))
3383 bool smComputed = nbVol && !sm->IsEmpty();
3384 if ( smComputed && internals.hasInternalVertexInSolid( sm->GetId() ))
3386 int nbIntV = internals.getSolidsWithVertices().find( sm->GetId() )->second.size();
3387 SMESHDS_SubMesh* smDS = sm->GetSubMeshDS();
3388 smComputed = ( smDS->NbElements() > 0 || smDS->NbNodes() > nbIntV );
3390 SMESH_ComputeErrorPtr& smError = sm->GetComputeError();
3391 if ( !smComputed && ( !smError || smError->IsOK() ))
3394 if ( nbVol && SMESH_Algo::GetMeshError( sm ) == SMESH_Algo::MEr_OK )
3396 smError->myName = COMPERR_WARNING;
3398 else if ( smError->HasBadElems() ) // bad surface mesh
3400 if ( !hasBadElemOnSolid
3401 ( static_cast<SMESH_BadInputElements*>( smError.get() )->myBadElements, sm ))
3405 pb3D = pb3D || ( smError && smError->IsKO() );
3407 if ( !pb2D && !pb3D )
3408 err = 0; // no fatal errors, only warnings
3411 ngLib._isComputeOk = !err;
3416 //=============================================================================
3420 //=============================================================================
3421 bool NETGENPlugin_Mesher::Evaluate(MapShapeNbElems& aResMap)
3423 netgen::MeshingParameters& mparams = netgen::mparam;
3426 // -------------------------
3427 // Prepare OCC geometry
3428 // -------------------------
3429 netgen::OCCGeometry occgeo;
3430 NETGENPlugin_Internals internals( *_mesh, _shape, _isVolume );
3431 PrepareOCCgeometry( occgeo, _shape, *_mesh, 0, &internals );
3433 bool tooManyElems = false;
3434 const int hugeNb = std::numeric_limits<int>::max() / 100;
3439 // pass 1D simple parameters to NETGEN
3442 // not to RestrictLocalH() according to curvature during MESHCONST_ANALYSE
3443 mparams.uselocalh = false;
3444 mparams.grading = 0.8; // not limitited size growth
3446 if ( _simpleHyp->GetNumberOfSegments() )
3448 mparams.maxh = occgeo.boundingbox.Diam();
3451 mparams.maxh = _simpleHyp->GetLocalLength();
3454 if ( mparams.maxh == 0.0 )
3455 mparams.maxh = occgeo.boundingbox.Diam();
3456 if ( _simpleHyp || ( mparams.minh == 0.0 && _fineness != NETGENPlugin_Hypothesis::UserDefined))
3457 mparams.minh = GetDefaultMinSize( _shape, mparams.maxh );
3459 // let netgen create _ngMesh and calculate element size on not meshed shapes
3460 NETGENPlugin_NetgenLibWrapper ngLib;
3461 netgen::Mesh *ngMesh = NULL;
3465 int startWith = netgen::MESHCONST_ANALYSE;
3466 int endWith = netgen::MESHCONST_MESHEDGES;
3468 int err = netgen::OCCGenerateMesh(occgeo, ngMesh, mparams, startWith, endWith);
3470 int err = netgen::OCCGenerateMesh(occgeo, ngMesh, startWith, endWith, optstr);
3473 if(netgen::multithread.terminate)
3476 ngLib.setMesh(( Ng_Mesh*) ngMesh );
3478 if ( SMESH_subMesh* sm = _mesh->GetSubMeshContaining( _shape ))
3479 sm->GetComputeError().reset( new SMESH_ComputeError( COMPERR_ALGO_FAILED ));
3482 // if ( _simpleHyp )
3484 // // Pass 1D simple parameters to NETGEN
3485 // // --------------------------------
3486 // int nbSeg = _simpleHyp->GetNumberOfSegments();
3487 // double segSize = _simpleHyp->GetLocalLength();
3488 // for ( int iE = 1; iE <= occgeo.emap.Extent(); ++iE )
3490 // const TopoDS_Edge& e = TopoDS::Edge( occgeo.emap(iE));
3492 // segSize = SMESH_Algo::EdgeLength( e ) / ( nbSeg - 0.4 );
3493 // setLocalSize( e, segSize, *ngMesh );
3496 // else // if ( ! _simpleHyp )
3498 // // Local size on shapes
3499 // SetLocalSize( occgeo, *ngMesh );
3501 // calculate total nb of segments and length of edges
3502 double fullLen = 0.0;
3504 int entity = mparams.secondorder > 0 ? SMDSEntity_Quad_Edge : SMDSEntity_Edge;
3505 TopTools_DataMapOfShapeInteger Edge2NbSeg;
3506 for (TopExp_Explorer exp(_shape, TopAbs_EDGE); exp.More(); exp.Next())
3508 TopoDS_Edge E = TopoDS::Edge( exp.Current() );
3509 if( !Edge2NbSeg.Bind(E,0) )
3512 double aLen = SMESH_Algo::EdgeLength(E);
3515 vector<int>& aVec = aResMap[_mesh->GetSubMesh(E)];
3517 aVec.resize( SMDSEntity_Last, 0);
3519 fullNbSeg += aVec[ entity ];
3522 // store nb of segments computed by Netgen
3523 NCollection_Map<Link> linkMap;
3524 for (int i = 1; i <= ngMesh->GetNSeg(); ++i )
3526 const netgen::Segment& seg = ngMesh->LineSegment(i);
3527 Link link(seg[0], seg[1]);
3528 if ( !linkMap.Add( link )) continue;
3529 int aGeomEdgeInd = seg.epgeominfo[0].edgenr;
3530 if (aGeomEdgeInd > 0 && aGeomEdgeInd <= occgeo.emap.Extent())
3532 vector<int>& aVec = aResMap[_mesh->GetSubMesh(occgeo.emap(aGeomEdgeInd))];
3536 // store nb of nodes on edges computed by Netgen
3537 TopTools_DataMapIteratorOfDataMapOfShapeInteger Edge2NbSegIt(Edge2NbSeg);
3538 for (; Edge2NbSegIt.More(); Edge2NbSegIt.Next())
3540 vector<int>& aVec = aResMap[_mesh->GetSubMesh(Edge2NbSegIt.Key())];
3541 if ( aVec[ entity ] > 1 && aVec[ SMDSEntity_Node ] == 0 )
3542 aVec[SMDSEntity_Node] = mparams.secondorder > 0 ? 2*aVec[ entity ]-1 : aVec[ entity ]-1;
3544 fullNbSeg += aVec[ entity ];
3545 Edge2NbSeg( Edge2NbSegIt.Key() ) = aVec[ entity ];
3547 if ( fullNbSeg == 0 )
3554 if ( double area = _simpleHyp->GetMaxElementArea() ) {
3556 mparams.maxh = sqrt(2. * area/sqrt(3.0));
3557 mparams.grading = 0.4; // moderate size growth
3560 // length from edges
3561 mparams.maxh = fullLen/fullNbSeg;
3562 mparams.grading = 0.2; // slow size growth
3565 mparams.maxh = min( mparams.maxh, occgeo.boundingbox.Diam()/2 );
3566 mparams.maxh = min( mparams.maxh, fullLen/fullNbSeg * (1. + mparams.grading));
3568 for (TopExp_Explorer exp(_shape, TopAbs_FACE); exp.More(); exp.Next())
3570 TopoDS_Face F = TopoDS::Face( exp.Current() );
3571 SMESH_subMesh *sm = _mesh->GetSubMesh(F);
3573 BRepGProp::SurfaceProperties(F,G);
3574 double anArea = G.Mass();
3575 tooManyElems = tooManyElems || ( anArea/hugeNb > mparams.maxh*mparams.maxh );
3577 if ( !tooManyElems )
3579 TopTools_MapOfShape edges;
3580 for (TopExp_Explorer exp1(F,TopAbs_EDGE); exp1.More(); exp1.Next())
3581 if ( edges.Add( exp1.Current() ))
3582 nb1d += Edge2NbSeg.Find(exp1.Current());
3584 int nbFaces = tooManyElems ? hugeNb : int( 4*anArea / (mparams.maxh*mparams.maxh*sqrt(3.)));
3585 int nbNodes = tooManyElems ? hugeNb : (( nbFaces*3 - (nb1d-1)*2 ) / 6 + 1 );
3587 vector<int> aVec(SMDSEntity_Last, 0);
3588 if( mparams.secondorder > 0 ) {
3589 int nb1d_in = (nbFaces*3 - nb1d) / 2;
3590 aVec[SMDSEntity_Node] = nbNodes + nb1d_in;
3591 aVec[SMDSEntity_Quad_Triangle] = nbFaces;
3594 aVec[SMDSEntity_Node] = Max ( nbNodes, 0 );
3595 aVec[SMDSEntity_Triangle] = nbFaces;
3597 aResMap[sm].swap(aVec);
3604 // pass 3D simple parameters to NETGEN
3605 const NETGENPlugin_SimpleHypothesis_3D* simple3d =
3606 dynamic_cast< const NETGENPlugin_SimpleHypothesis_3D* > ( _simpleHyp );
3608 if ( double vol = simple3d->GetMaxElementVolume() ) {
3610 mparams.maxh = pow( 72, 1/6. ) * pow( vol, 1/3. );
3611 mparams.maxh = min( mparams.maxh, occgeo.boundingbox.Diam()/2 );
3614 // using previous length from faces
3616 mparams.grading = 0.4;
3617 mparams.maxh = min( mparams.maxh, fullLen/fullNbSeg * (1. + mparams.grading));
3620 BRepGProp::VolumeProperties(_shape,G);
3621 double aVolume = G.Mass();
3622 double tetrVol = 0.1179*mparams.maxh*mparams.maxh*mparams.maxh;
3623 tooManyElems = tooManyElems || ( aVolume/hugeNb > tetrVol );
3624 int nbVols = tooManyElems ? hugeNb : int(aVolume/tetrVol);
3625 int nb1d_in = int(( nbVols*6 - fullNbSeg ) / 6 );
3626 vector<int> aVec(SMDSEntity_Last, 0 );
3627 if ( tooManyElems ) // avoid FPE
3629 aVec[SMDSEntity_Node] = hugeNb;
3630 aVec[ mparams.secondorder > 0 ? SMDSEntity_Quad_Tetra : SMDSEntity_Tetra] = hugeNb;
3634 if( mparams.secondorder > 0 ) {
3635 aVec[SMDSEntity_Node] = nb1d_in/3 + 1 + nb1d_in;
3636 aVec[SMDSEntity_Quad_Tetra] = nbVols;
3639 aVec[SMDSEntity_Node] = nb1d_in/3 + 1;
3640 aVec[SMDSEntity_Tetra] = nbVols;
3643 SMESH_subMesh *sm = _mesh->GetSubMesh(_shape);
3644 aResMap[sm].swap(aVec);
3650 double NETGENPlugin_Mesher::GetProgress(const SMESH_Algo* holder,
3651 const int * algoProgressTic,
3652 const double * algoProgress) const
3654 ((int&) _progressTic ) = *algoProgressTic + 1;
3656 if ( !_occgeom ) return 0;
3658 double progress = -1;
3661 if ( _ticTime < 0 && netgen::multithread.task[0] == 'O'/*Optimizing surface*/ )
3663 ((double&) _ticTime ) = edgeFaceMeshingTime / _totalTime / _progressTic;
3665 else if ( !_optimize /*&& _occgeom->fmap.Extent() > 1*/ )
3667 int doneShapeIndex = -1;
3668 while ( doneShapeIndex+1 < _occgeom->facemeshstatus.Size() &&
3669 _occgeom->facemeshstatus[ doneShapeIndex+1 ])
3671 if ( doneShapeIndex+1 != _curShapeIndex )
3673 ((int&) _curShapeIndex) = doneShapeIndex+1;
3674 double doneShapeRate = _curShapeIndex / double( _occgeom->fmap.Extent() );
3675 double doneTime = edgeMeshingTime + doneShapeRate * faceMeshingTime;
3676 ((double&) _ticTime) = doneTime / _totalTime / _progressTic;
3677 // cout << "shape " << _curShapeIndex << " _ticTime " << _ticTime
3678 // << " " << doneTime / _totalTime / _progressTic << endl;
3682 else if ( !_optimize && _occgeom->somap.Extent() > 1 )
3684 int curShapeIndex = _curShapeIndex;
3685 if ( _ngMesh->GetNE() > 0 )
3687 netgen::Element el = (*_ngMesh)[netgen::ElementIndex( _ngMesh->GetNE()-1 )];
3688 curShapeIndex = el.GetIndex();
3690 if ( curShapeIndex != _curShapeIndex )
3692 ((int&) _curShapeIndex) = curShapeIndex;
3693 double doneShapeRate = _curShapeIndex / double( _occgeom->somap.Extent() );
3694 double doneTime = edgeFaceMeshingTime + doneShapeRate * voluMeshingTime;
3695 ((double&) _ticTime) = doneTime / _totalTime / _progressTic;
3696 // cout << "shape " << _curShapeIndex << " _ticTime " << _ticTime
3697 // << " " << doneTime / _totalTime / _progressTic << endl;
3702 progress = Max( *algoProgressTic * _ticTime, *algoProgress );
3707 netgen::multithread.task[0] == 'D'/*elaunay meshing*/ &&
3708 progress > voluMeshingTime )
3710 progress = voluMeshingTime;
3711 ((double&) _ticTime) = voluMeshingTime / _totalTime / _progressTic;
3713 ((int&) *algoProgressTic )++;
3714 ((double&) *algoProgress) = progress;
3716 //cout << progress << " " << *algoProgressTic << " " << netgen::multithread.task << " "<< _ticTime << endl;
3718 return Min( progress, 0.99 );
3721 //================================================================================
3723 * \brief Read mesh entities preventing successful computation from "test.out" file
3725 //================================================================================
3727 SMESH_ComputeErrorPtr
3728 NETGENPlugin_Mesher::ReadErrors(const vector<const SMDS_MeshNode* >& nodeVec)
3730 if ( nodeVec.size() < 2 ) return SMESH_ComputeErrorPtr();
3731 SMESH_BadInputElements* err =
3732 new SMESH_BadInputElements( nodeVec.back()->GetMesh(), COMPERR_BAD_INPUT_MESH,
3733 "Some edges multiple times in surface mesh");
3734 SMESH_File file("test.out");
3736 vector<int> three1(3), three2(3);
3737 const char* badEdgeStr = " multiple times in surface mesh";
3738 const int badEdgeStrLen = strlen( badEdgeStr );
3739 const int nbNodes = nodeVec.size();
3741 while( !file.eof() )
3743 if ( strncmp( file, "Edge ", 5 ) == 0 &&
3744 file.getInts( two ) &&
3745 strncmp( file, badEdgeStr, badEdgeStrLen ) == 0 &&
3746 two[0] < nbNodes && two[1] < nbNodes )
3748 err->myBadElements.push_back( new SMDS_LinearEdge( nodeVec[ two[0]], nodeVec[ two[1]] ));
3749 file += badEdgeStrLen;
3751 else if ( strncmp( file, "Intersecting: ", 14 ) == 0 )
3754 // openelement 18 with open element 126
3758 const char* pos = file;
3759 bool ok = ( strncmp( file, "openelement ", 12 ) == 0 );
3760 ok = ok && file.getInts( two );
3761 ok = ok && file.getInts( three1 );
3762 ok = ok && file.getInts( three2 );
3763 for ( int i = 0; ok && i < 3; ++i )
3764 ok = ( three1[i] < nbNodes && nodeVec[ three1[i]]);
3765 for ( int i = 0; ok && i < 3; ++i )
3766 ok = ( three2[i] < nbNodes && nodeVec[ three2[i]]);
3769 err->myBadElements.push_back( new SMDS_FaceOfNodes( nodeVec[ three1[0]],
3770 nodeVec[ three1[1]],
3771 nodeVec[ three1[2]]));
3772 err->myBadElements.push_back( new SMDS_FaceOfNodes( nodeVec[ three2[0]],
3773 nodeVec[ three2[1]],
3774 nodeVec[ three2[2]]));
3775 err->myComment = "Intersecting triangles";
3789 size_t nbBadElems = err->myBadElements.size();
3790 if ( nbBadElems ) nbBadElems++; // avoid warning: variable set but not used
3793 return SMESH_ComputeErrorPtr( err );
3796 //================================================================================
3798 * \brief Write a python script creating an equivalent SALOME mesh.
3799 * This is useful to see what mesh is passed as input for the next step of mesh
3800 * generation (of mesh of higher dimension)
3802 //================================================================================
3804 void NETGENPlugin_Mesher::toPython( const netgen::Mesh* ngMesh )
3806 const char* pyFile = "/tmp/ngMesh.py";
3807 ofstream outfile( pyFile, ios::out );
3808 if ( !outfile ) return;
3810 outfile << "import salome, SMESH" << std::endl
3811 << "from salome.smesh import smeshBuilder" << std::endl
3812 << "smesh = smeshBuilder.New()" << std::endl
3813 << "mesh = smesh.Mesh()" << std::endl << std::endl;
3815 using namespace netgen;
3817 for (pi = PointIndex::BASE;
3818 pi < ngMesh->GetNP()+PointIndex::BASE; pi++)
3820 outfile << "mesh.AddNode( ";
3821 outfile << (*ngMesh)[pi](0) << ", ";
3822 outfile << (*ngMesh)[pi](1) << ", ";
3823 outfile << (*ngMesh)[pi](2) << ") ## "<< pi << std::endl;
3826 int nbDom = ngMesh->GetNDomains();
3827 for ( int i = 0; i < nbDom; ++i )
3828 outfile<< "grp" << i+1 << " = mesh.CreateEmptyGroup( SMESH.FACE, 'domain"<< i+1 << "')"<< std::endl;
3830 SurfaceElementIndex sei;
3831 for (sei = 0; sei < ngMesh->GetNSE(); sei++)
3833 outfile << "mesh.AddFace([ ";
3834 Element2d sel = (*ngMesh)[sei];
3835 for (int j = 0; j < sel.GetNP(); j++)
3836 outfile << sel[j] << ( j+1 < sel.GetNP() ? ", " : " ])");
3837 if ( sel.IsDeleted() ) outfile << " ## IsDeleted ";
3838 outfile << std::endl;
3840 if ((*ngMesh)[sei].GetIndex())
3842 if ( int dom1 = ngMesh->GetFaceDescriptor((*ngMesh)[sei].GetIndex ()).DomainIn())
3843 outfile << "grp"<< dom1 <<".Add([ " << (int)sei+1 << " ])" << std::endl;
3844 if ( int dom2 = ngMesh->GetFaceDescriptor((*ngMesh)[sei].GetIndex ()).DomainOut())
3845 outfile << "grp"<< dom2 <<".Add([ " << (int)sei+1 << " ])" << std::endl;
3849 for (ElementIndex ei = 0; ei < ngMesh->GetNE(); ei++)
3851 Element el = (*ngMesh)[ei];
3852 outfile << "mesh.AddVolume([ ";
3853 for (int j = 0; j < el.GetNP(); j++)
3854 outfile << el[j] << ( j+1 < el.GetNP() ? ", " : " ])");
3855 outfile << std::endl;
3858 for (int i = 1; i <= ngMesh->GetNSeg(); i++)
3860 const Segment & seg = ngMesh->LineSegment (i);
3861 outfile << "mesh.AddEdge([ "
3863 << seg[1] << " ])" << std::endl;
3865 std::cout << "Write " << pyFile << std::endl;
3868 //================================================================================
3870 * \brief Constructor of NETGENPlugin_ngMeshInfo
3872 //================================================================================
3874 NETGENPlugin_ngMeshInfo::NETGENPlugin_ngMeshInfo( netgen::Mesh* ngMesh,
3875 bool checkRemovedElems):
3876 _elementsRemoved( false ), _copyOfLocalH(0)
3880 _nbNodes = ngMesh->GetNP();
3881 _nbSegments = ngMesh->GetNSeg();
3882 _nbFaces = ngMesh->GetNSE();
3883 _nbVolumes = ngMesh->GetNE();
3885 if ( checkRemovedElems )
3886 for ( int i = 1; i <= ngMesh->GetNSE() && !_elementsRemoved; ++i )
3887 _elementsRemoved = ngMesh->SurfaceElement(i).IsDeleted();
3891 _nbNodes = _nbSegments = _nbFaces = _nbVolumes = 0;
3895 //================================================================================
3897 * \brief Copy LocalH member from one netgen mesh to another
3899 //================================================================================
3901 void NETGENPlugin_ngMeshInfo::transferLocalH( netgen::Mesh* fromMesh,
3902 netgen::Mesh* toMesh )
3904 if ( !fromMesh->LocalHFunctionGenerated() ) return;
3905 if ( !toMesh->LocalHFunctionGenerated() )
3907 toMesh->CalcLocalH(netgen::mparam.grading);
3909 toMesh->CalcLocalH();
3912 const size_t size = sizeof( netgen::LocalH );
3913 _copyOfLocalH = new char[ size ];
3914 memcpy( (void*)_copyOfLocalH, (void*)&toMesh->LocalHFunction(), size );
3915 memcpy( (void*)&toMesh->LocalHFunction(), (void*)&fromMesh->LocalHFunction(), size );
3918 //================================================================================
3920 * \brief Restore LocalH member of a netgen mesh
3922 //================================================================================
3924 void NETGENPlugin_ngMeshInfo::restoreLocalH( netgen::Mesh* toMesh )
3926 if ( _copyOfLocalH )
3928 const size_t size = sizeof( netgen::LocalH );
3929 memcpy( (void*)&toMesh->LocalHFunction(), (void*)_copyOfLocalH, size );
3930 delete [] _copyOfLocalH;
3935 //================================================================================
3937 * \brief Find "internal" sub-shapes
3939 //================================================================================
3941 NETGENPlugin_Internals::NETGENPlugin_Internals( SMESH_Mesh& mesh,
3942 const TopoDS_Shape& shape,
3944 : _mesh( mesh ), _is3D( is3D )
3946 SMESHDS_Mesh* meshDS = mesh.GetMeshDS();
3948 TopExp_Explorer f,e;
3949 for ( f.Init( shape, TopAbs_FACE ); f.More(); f.Next() )
3951 int faceID = meshDS->ShapeToIndex( f.Current() );
3953 // find not computed internal edges
3955 for ( e.Init( f.Current().Oriented(TopAbs_FORWARD), TopAbs_EDGE ); e.More(); e.Next() )
3956 if ( e.Current().Orientation() == TopAbs_INTERNAL )
3958 SMESH_subMesh* eSM = mesh.GetSubMesh( e.Current() );
3959 if ( eSM->IsEmpty() )
3961 _e2face.insert( make_pair( eSM->GetId(), faceID ));
3962 for ( TopoDS_Iterator v(e.Current()); v.More(); v.Next() )
3963 _e2face.insert( make_pair( meshDS->ShapeToIndex( v.Value() ), faceID ));
3967 // find internal vertices in a face
3968 set<int> intVV; // issue 0020850 where same vertex is twice in a face
3969 for ( TopoDS_Iterator fSub( f.Current() ); fSub.More(); fSub.Next())
3970 if ( fSub.Value().ShapeType() == TopAbs_VERTEX )
3972 int vID = meshDS->ShapeToIndex( fSub.Value() );
3973 if ( intVV.insert( vID ).second )
3974 _f2v[ faceID ].push_back( vID );
3979 // find internal faces and their subshapes where nodes are to be doubled
3980 // to make a crack with non-sewed borders
3982 if ( f.Current().Orientation() == TopAbs_INTERNAL )
3984 _intShapes.insert( meshDS->ShapeToIndex( f.Current() ));
3987 list< TopoDS_Shape > edges;
3988 for ( e.Init( f.Current(), TopAbs_EDGE ); e.More(); e.Next())
3989 if ( SMESH_MesherHelper::NbAncestors( e.Current(), mesh, TopAbs_FACE ) > 1 )
3991 _intShapes.insert( meshDS->ShapeToIndex( e.Current() ));
3992 edges.push_back( e.Current() );
3993 // find border faces
3994 PShapeIteratorPtr fIt =
3995 SMESH_MesherHelper::GetAncestors( edges.back(),mesh,TopAbs_FACE );
3996 while ( const TopoDS_Shape* pFace = fIt->next() )
3997 if ( !pFace->IsSame( f.Current() ))
3998 _borderFaces.insert( meshDS->ShapeToIndex( *pFace ));
4001 // we consider vertex internal if it is shared by more than one internal edge
4002 list< TopoDS_Shape >::iterator edge = edges.begin();
4003 for ( ; edge != edges.end(); ++edge )
4004 for ( TopoDS_Iterator v( *edge ); v.More(); v.Next() )
4006 set<int> internalEdges;
4007 PShapeIteratorPtr eIt =
4008 SMESH_MesherHelper::GetAncestors( v.Value(),mesh,TopAbs_EDGE );
4009 while ( const TopoDS_Shape* pEdge = eIt->next() )
4011 int edgeID = meshDS->ShapeToIndex( *pEdge );
4012 if ( isInternalShape( edgeID ))
4013 internalEdges.insert( edgeID );
4015 if ( internalEdges.size() > 1 )
4016 _intShapes.insert( meshDS->ShapeToIndex( v.Value() ));
4020 } // loop on geom faces
4022 // find vertices internal in solids
4025 for ( TopExp_Explorer so(shape, TopAbs_SOLID); so.More(); so.Next())
4027 int soID = meshDS->ShapeToIndex( so.Current() );
4028 for ( TopoDS_Iterator soSub( so.Current() ); soSub.More(); soSub.Next())
4029 if ( soSub.Value().ShapeType() == TopAbs_VERTEX )
4030 _s2v[ soID ].push_back( meshDS->ShapeToIndex( soSub.Value() ));
4035 //================================================================================
4037 * \brief Find mesh faces on non-internal geom faces sharing internal edge
4038 * some nodes of which are to be doubled to make the second border of the "crack"
4040 //================================================================================
4042 void NETGENPlugin_Internals::findBorderElements( TIDSortedElemSet & borderElems )
4044 if ( _intShapes.empty() ) return;
4046 SMESH_Mesh& mesh = const_cast<SMESH_Mesh&>(_mesh);
4047 SMESHDS_Mesh* meshDS = mesh.GetMeshDS();
4049 // loop on internal geom edges
4050 set<int>::const_iterator intShapeId = _intShapes.begin();
4051 for ( ; intShapeId != _intShapes.end(); ++intShapeId )
4053 const TopoDS_Shape& s = meshDS->IndexToShape( *intShapeId );
4054 if ( s.ShapeType() != TopAbs_EDGE ) continue;
4056 // get internal and non-internal geom faces sharing the internal edge <s>
4058 set<int>::iterator bordFace = _borderFaces.end();
4059 PShapeIteratorPtr faces = SMESH_MesherHelper::GetAncestors( s, _mesh, TopAbs_FACE );
4060 while ( const TopoDS_Shape* pFace = faces->next() )
4062 int faceID = meshDS->ShapeToIndex( *pFace );
4063 if ( isInternalShape( faceID ))
4066 bordFace = _borderFaces.insert( faceID ).first;
4068 if ( bordFace == _borderFaces.end() || !intFace ) continue;
4070 // get all links of mesh faces on internal geom face sharing nodes on edge <s>
4071 set< SMESH_OrientedLink > links; //!< links of faces on internal geom face
4072 list<const SMDS_MeshElement*> suspectFaces[2]; //!< mesh faces on border geom faces
4073 int nbSuspectFaces = 0;
4074 SMESHDS_SubMesh* intFaceSM = meshDS->MeshElements( intFace );
4075 if ( !intFaceSM || intFaceSM->NbElements() == 0 ) continue;
4076 SMESH_subMeshIteratorPtr smIt = mesh.GetSubMesh( s )->getDependsOnIterator(true,true);
4077 while ( smIt->more() )
4079 SMESHDS_SubMesh* sm = smIt->next()->GetSubMeshDS();
4080 if ( !sm ) continue;
4081 SMDS_NodeIteratorPtr nIt = sm->GetNodes();
4082 while ( nIt->more() )
4084 const SMDS_MeshNode* nOnEdge = nIt->next();
4085 SMDS_ElemIteratorPtr fIt = nOnEdge->GetInverseElementIterator(SMDSAbs_Face);
4086 while ( fIt->more() )
4088 const SMDS_MeshElement* f = fIt->next();
4089 const int nbNodes = f->NbCornerNodes();
4090 if ( intFaceSM->Contains( f ))
4092 for ( int i = 0; i < nbNodes; ++i )
4093 links.insert( SMESH_OrientedLink( f->GetNode(i), f->GetNode((i+1)%nbNodes)));
4098 for ( int i = 0; i < nbNodes; ++i )
4099 nbDblNodes += isInternalShape( f->GetNode(i)->getshapeId() );
4101 suspectFaces[ nbDblNodes < 2 ].push_back( f );
4107 // suspectFaces[0] having link with same orientation as mesh faces on
4108 // the internal geom face are <borderElems>. suspectFaces[1] have
4109 // only one node on edge <s>, we decide on them later (at the 2nd loop)
4110 // by links of <borderElems> found at the 1st and 2nd loops
4111 set< SMESH_OrientedLink > borderLinks;
4112 for ( int isPostponed = 0; isPostponed < 2; ++isPostponed )
4114 list<const SMDS_MeshElement*>::iterator fIt = suspectFaces[isPostponed].begin();
4115 for ( int nbF = 0; fIt != suspectFaces[isPostponed].end(); ++fIt, ++nbF )
4117 const SMDS_MeshElement* f = *fIt;
4118 bool isBorder = false, linkFound = false, borderLinkFound = false;
4119 list< SMESH_OrientedLink > faceLinks;
4120 int nbNodes = f->NbCornerNodes();
4121 for ( int i = 0; i < nbNodes; ++i )
4123 SMESH_OrientedLink link( f->GetNode(i), f->GetNode((i+1)%nbNodes));
4124 faceLinks.push_back( link );
4127 set< SMESH_OrientedLink >::iterator foundLink = links.find( link );
4128 if ( foundLink != links.end() )
4131 isBorder = ( foundLink->_reversed == link._reversed );
4132 if ( !isBorder && !isPostponed ) break;
4133 faceLinks.pop_back();
4135 else if ( isPostponed && !borderLinkFound )
4137 foundLink = borderLinks.find( link );
4138 if ( foundLink != borderLinks.end() )
4140 borderLinkFound = true;
4141 isBorder = ( foundLink->_reversed != link._reversed );
4148 borderElems.insert( f );
4149 borderLinks.insert( faceLinks.begin(), faceLinks.end() );
4151 else if ( !linkFound && !borderLinkFound )
4153 suspectFaces[1].push_back( f );
4154 if ( nbF > 2 * nbSuspectFaces )
4155 break; // dead loop protection
4162 //================================================================================
4164 * \brief put internal shapes in maps and fill in submeshes to precompute
4166 //================================================================================
4168 void NETGENPlugin_Internals::getInternalEdges( TopTools_IndexedMapOfShape& fmap,
4169 TopTools_IndexedMapOfShape& emap,
4170 TopTools_IndexedMapOfShape& vmap,
4171 list< SMESH_subMesh* > smToPrecompute[])
4173 if ( !hasInternalEdges() ) return;
4174 map<int,int>::const_iterator ev_face = _e2face.begin();
4175 for ( ; ev_face != _e2face.end(); ++ev_face )
4177 const TopoDS_Shape& ev = _mesh.GetMeshDS()->IndexToShape( ev_face->first );
4178 const TopoDS_Shape& face = _mesh.GetMeshDS()->IndexToShape( ev_face->second );
4180 ( ev.ShapeType() == TopAbs_EDGE ? emap : vmap ).Add( ev );
4182 //cout<<"INTERNAL EDGE or VERTEX "<<ev_face->first<<" on face "<<ev_face->second<<endl;
4184 smToPrecompute[ MeshDim_1D ].push_back( _mesh.GetSubMeshContaining( ev_face->first ));
4188 //================================================================================
4190 * \brief return shapes and submeshes to be meshed and already meshed boundary submeshes
4192 //================================================================================
4194 void NETGENPlugin_Internals::getInternalFaces( TopTools_IndexedMapOfShape& fmap,
4195 TopTools_IndexedMapOfShape& emap,
4196 list< SMESH_subMesh* >& intFaceSM,
4197 list< SMESH_subMesh* >& boundarySM)
4199 if ( !hasInternalFaces() ) return;
4201 // <fmap> and <emap> are for not yet meshed shapes
4202 // <intFaceSM> is for submeshes of faces
4203 // <boundarySM> is for meshed edges and vertices
4208 set<int> shapeIDs ( _intShapes );
4209 if ( !_borderFaces.empty() )
4210 shapeIDs.insert( _borderFaces.begin(), _borderFaces.end() );
4212 set<int>::const_iterator intS = shapeIDs.begin();
4213 for ( ; intS != shapeIDs.end(); ++intS )
4215 SMESH_subMesh* sm = _mesh.GetSubMeshContaining( *intS );
4217 if ( sm->GetSubShape().ShapeType() != TopAbs_FACE ) continue;
4219 intFaceSM.push_back( sm );
4221 // add submeshes of not computed internal faces
4222 if ( !sm->IsEmpty() ) continue;
4224 SMESH_subMeshIteratorPtr smIt = sm->getDependsOnIterator(true,true);
4225 while ( smIt->more() )
4228 const TopoDS_Shape& s = sm->GetSubShape();
4230 if ( sm->IsEmpty() )
4233 switch ( s.ShapeType() ) {
4234 case TopAbs_FACE: fmap.Add ( s ); break;
4235 case TopAbs_EDGE: emap.Add ( s ); break;
4241 if ( s.ShapeType() != TopAbs_FACE )
4242 boundarySM.push_back( sm );
4248 //================================================================================
4250 * \brief Return true if given shape is to be precomputed in order to be correctly
4251 * added to netgen mesh
4253 //================================================================================
4255 bool NETGENPlugin_Internals::isShapeToPrecompute(const TopoDS_Shape& s)
4257 int shapeID = _mesh.GetMeshDS()->ShapeToIndex( s );
4258 switch ( s.ShapeType() ) {
4259 case TopAbs_FACE : break; //return isInternalShape( shapeID ) || isBorderFace( shapeID );
4260 case TopAbs_EDGE : return isInternalEdge( shapeID );
4261 case TopAbs_VERTEX: break;
4267 //================================================================================
4269 * \brief Return SMESH
4271 //================================================================================
4273 SMESH_Mesh& NETGENPlugin_Internals::getMesh() const
4275 return const_cast<SMESH_Mesh&>( _mesh );
4278 //================================================================================
4280 * \brief Access to a counter of NETGENPlugin_NetgenLibWrapper instances
4282 //================================================================================
4284 int& NETGENPlugin_NetgenLibWrapper::instanceCounter()
4286 static int theCouner = 0;
4290 //================================================================================
4292 * \brief Initialize netgen library
4294 //================================================================================
4296 NETGENPlugin_NetgenLibWrapper::NETGENPlugin_NetgenLibWrapper()
4298 if ( instanceCounter() == 0 )
4301 ++instanceCounter();
4303 _isComputeOk = false;
4307 if ( !getenv( "KEEP_NETGEN_OUTPUT" ))
4309 // redirect all netgen output (mycout,myerr,cout) to _outputFileName
4310 _outputFileName = getOutputFileName();
4311 _ngcout = netgen::mycout;
4312 _ngcerr = netgen::myerr;
4313 netgen::mycout = new ofstream ( _outputFileName.c_str() );
4314 netgen::myerr = netgen::mycout;
4315 _coutBuffer = std::cout.rdbuf();
4317 std::cout << "NOTE: netgen output is redirected to file " << _outputFileName << std::endl;
4319 std::cout.rdbuf( netgen::mycout->rdbuf() );
4323 _ngMesh = Ng_NewMesh();
4326 //================================================================================
4328 * \brief Finish using netgen library
4330 //================================================================================
4332 NETGENPlugin_NetgenLibWrapper::~NETGENPlugin_NetgenLibWrapper()
4334 --instanceCounter();
4336 Ng_DeleteMesh( _ngMesh );
4340 std::cout.rdbuf( _coutBuffer );
4347 //================================================================================
4349 * \brief Set netgen mesh to delete at destruction
4351 //================================================================================
4353 void NETGENPlugin_NetgenLibWrapper::setMesh( Ng_Mesh* mesh )
4356 Ng_DeleteMesh( _ngMesh );
4360 //================================================================================
4362 * \brief Return a unique file name
4364 //================================================================================
4366 std::string NETGENPlugin_NetgenLibWrapper::getOutputFileName()
4368 std::string aTmpDir = SALOMEDS_Tool::GetTmpDir();
4370 TCollection_AsciiString aGenericName = (char*)aTmpDir.c_str();
4371 aGenericName += "NETGEN_";
4373 aGenericName += getpid();
4375 aGenericName += _getpid();
4377 aGenericName += "_";
4378 aGenericName += Abs((Standard_Integer)(long) aGenericName.ToCString());
4379 aGenericName += ".out";
4381 return aGenericName.ToCString();
4384 //================================================================================
4386 * \brief Remove "test.out" and "problemfaces" files in current directory
4388 //================================================================================
4390 void NETGENPlugin_NetgenLibWrapper::RemoveTmpFiles()
4392 bool rm = SMESH_File("test.out").remove() ;
4394 if ( rm && netgen::testout && instanceCounter() == 0 )
4396 delete netgen::testout;
4397 netgen::testout = 0;
4400 SMESH_File("problemfaces").remove();
4401 SMESH_File("occmesh.rep").remove();
4404 //================================================================================
4406 * \brief Remove file with netgen output
4408 //================================================================================
4410 void NETGENPlugin_NetgenLibWrapper::removeOutputFile()
4412 if ( !_outputFileName.empty() )
4416 delete netgen::mycout;
4417 netgen::mycout = _ngcout;
4418 netgen::myerr = _ngcerr;
4421 string tmpDir = SALOMEDS_Tool::GetDirFromPath ( _outputFileName );
4422 string aFileName = SALOMEDS_Tool::GetNameFromPath( _outputFileName ) + ".out";
4423 SALOMEDS_Tool::ListOfFiles aFiles;
4425 aFiles.push_back(aFileName.c_str());
4427 SALOMEDS_Tool::RemoveTemporaryFiles( tmpDir.c_str(), aFiles, true );