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 // maximal mesh edge size
220 mparams.maxh = 0;//NETGENPlugin_Hypothesis::GetDefaultMaxSize();
222 // minimal number of segments per edge
223 mparams.segmentsperedge = NETGENPlugin_Hypothesis::GetDefaultNbSegPerEdge();
224 // rate of growth of size between elements
225 mparams.grading = NETGENPlugin_Hypothesis::GetDefaultGrowthRate();
226 // safety factor for curvatures (elements per radius)
227 mparams.curvaturesafety = NETGENPlugin_Hypothesis::GetDefaultNbSegPerRadius();
228 // create elements of second order
229 mparams.secondorder = NETGENPlugin_Hypothesis::GetDefaultSecondOrder();
230 // quad-dominated surface meshing
234 mparams.quad = NETGENPlugin_Hypothesis_2D::GetDefaultQuadAllowed();
235 _fineness = NETGENPlugin_Hypothesis::GetDefaultFineness();
236 mparams.uselocalh = NETGENPlugin_Hypothesis::GetDefaultSurfaceCurvature();
237 netgen::merge_solids = NETGENPlugin_Hypothesis::GetDefaultFuseEdges();
240 //=============================================================================
244 //=============================================================================
246 void SetLocalSize(TopoDS_Shape GeomShape, double LocalSize)
248 if ( GeomShape.IsNull() ) return;
249 TopAbs_ShapeEnum GeomType = GeomShape.ShapeType();
250 if (GeomType == TopAbs_COMPOUND) {
251 for (TopoDS_Iterator it (GeomShape); it.More(); it.Next()) {
252 SetLocalSize(it.Value(), LocalSize);
257 if (! ShapesWithLocalSize.Contains(GeomShape))
258 key = ShapesWithLocalSize.Add(GeomShape);
260 key = ShapesWithLocalSize.FindIndex(GeomShape);
261 if (GeomType == TopAbs_VERTEX) {
262 VertexId2LocalSize[key] = LocalSize;
263 } else if (GeomType == TopAbs_EDGE) {
264 EdgeId2LocalSize[key] = LocalSize;
265 } else if (GeomType == TopAbs_FACE) {
266 FaceId2LocalSize[key] = LocalSize;
267 } else if (GeomType == TopAbs_SOLID) {
268 SolidId2LocalSize[key] = LocalSize;
272 //=============================================================================
274 * Pass parameters to NETGEN
276 //=============================================================================
277 void NETGENPlugin_Mesher::SetParameters(const NETGENPlugin_Hypothesis* hyp)
281 netgen::MeshingParameters& mparams = netgen::mparam;
282 // Initialize global NETGEN parameters:
283 // maximal mesh segment size
284 mparams.maxh = hyp->GetMaxSize();
285 // maximal mesh element linear size
286 mparams.minh = hyp->GetMinSize();
287 // minimal number of segments per edge
288 mparams.segmentsperedge = hyp->GetNbSegPerEdge();
289 // rate of growth of size between elements
290 mparams.grading = hyp->GetGrowthRate();
291 // safety factor for curvatures (elements per radius)
292 mparams.curvaturesafety = hyp->GetNbSegPerRadius();
293 // create elements of second order
294 mparams.secondorder = hyp->GetSecondOrder() ? 1 : 0;
295 // quad-dominated surface meshing
296 mparams.quad = hyp->GetQuadAllowed() ? 1 : 0;
297 _optimize = hyp->GetOptimize();
298 _fineness = hyp->GetFineness();
299 mparams.uselocalh = hyp->GetSurfaceCurvature();
300 netgen::merge_solids = hyp->GetFuseEdges();
301 _chordalError = hyp->GetChordalErrorEnabled() ? hyp->GetChordalError() : -1.;
302 mparams.optsteps2d = _optimize ? hyp->GetNbSurfOptSteps() : 0;
303 mparams.optsteps3d = _optimize ? hyp->GetNbVolOptSteps() : 0;
304 mparams.elsizeweight = hyp->GetElemSizeWeight();
305 mparams.opterrpow = hyp->GetWorstElemMeasure();
306 mparams.delaunay = hyp->GetUseDelauney();
307 mparams.checkoverlap = hyp->GetCheckOverlapping();
308 mparams.checkchartboundary = hyp->GetCheckChartBoundary();
311 mparams.meshsizefilename= hyp->GetMeshSizeFile().empty() ? 0 : hyp->GetMeshSizeFile().c_str();
313 const NETGENPlugin_Hypothesis::TLocalSize& localSizes = hyp->GetLocalSizesAndEntries();
314 if ( !localSizes.empty() )
316 SMESH_Gen_i* smeshGen_i = SMESH_Gen_i::GetSMESHGen();
317 NETGENPlugin_Hypothesis::TLocalSize::const_iterator it = localSizes.begin();
318 for ( ; it != localSizes.end() ; it++)
320 std::string entry = (*it).first;
321 double val = (*it).second;
323 GEOM::GEOM_Object_var aGeomObj;
324 SALOMEDS::SObject_var aSObj = SMESH_Gen_i::getStudyServant()->FindObjectID( entry.c_str() );
325 if ( !aSObj->_is_nil() ) {
326 CORBA::Object_var obj = aSObj->GetObject();
327 aGeomObj = GEOM::GEOM_Object::_narrow(obj);
330 TopoDS_Shape S = smeshGen_i->GeomObjectToShape( aGeomObj.in() );
331 ::SetLocalSize(S, val);
337 //=============================================================================
339 * Pass simple parameters to NETGEN
341 //=============================================================================
343 void NETGENPlugin_Mesher::SetParameters(const NETGENPlugin_SimpleHypothesis_2D* hyp)
347 SetDefaultParameters();
350 //================================================================================
352 * \brief Store a Viscous Layers hypothesis
354 //================================================================================
356 void NETGENPlugin_Mesher::SetParameters(const StdMeshers_ViscousLayers* hyp )
358 _viscousLayersHyp = hyp;
361 //=============================================================================
363 * Link - a pair of integer numbers
365 //=============================================================================
369 Link(int _n1, int _n2) : n1(_n1), n2(_n2) {}
370 Link() : n1(0), n2(0) {}
371 bool Contains( int n ) const { return n == n1 || n == n2; }
372 bool IsConnected( const Link& other ) const
374 return (( Contains( other.n1 ) || Contains( other.n2 )) && ( this != &other ));
378 int HashCode(const Link& aLink, int aLimit)
380 return HashCode(aLink.n1 + aLink.n2, aLimit);
383 Standard_Boolean IsEqual(const Link& aLink1, const Link& aLink2)
385 return (( aLink1.n1 == aLink2.n1 && aLink1.n2 == aLink2.n2 ) ||
386 ( aLink1.n1 == aLink2.n2 && aLink1.n2 == aLink2.n1 ));
391 //================================================================================
393 * \brief return id of netgen point corresponding to SMDS node
395 //================================================================================
396 typedef map< const SMDS_MeshNode*, int > TNode2IdMap;
398 int ngNodeId( const SMDS_MeshNode* node,
399 netgen::Mesh& ngMesh,
400 TNode2IdMap& nodeNgIdMap)
402 int newNgId = ngMesh.GetNP() + 1;
404 TNode2IdMap::iterator node_id = nodeNgIdMap.insert( make_pair( node, newNgId )).first;
406 if ( node_id->second == newNgId)
408 #if defined(DUMP_SEGMENTS) || defined(DUMP_TRIANGLES)
409 cout << "Ng " << newNgId << " - " << node;
411 netgen::MeshPoint p( netgen::Point<3> (node->X(), node->Y(), node->Z()) );
412 ngMesh.AddPoint( p );
414 return node_id->second;
417 //================================================================================
419 * \brief Return computed EDGEs connected to the given one
421 //================================================================================
423 list< TopoDS_Edge > getConnectedEdges( const TopoDS_Edge& edge,
424 const TopoDS_Face& face,
425 const set< SMESH_subMesh* > & computedSM,
426 const SMESH_MesherHelper& helper,
427 map< SMESH_subMesh*, set< int > >& addedEdgeSM2Faces)
430 list< TopoDS_Edge > edges;
431 list< int > nbEdgesInWire;
432 /*int nbWires =*/ SMESH_Block::GetOrderedEdges( face, edges, nbEdgesInWire);
434 // find <edge> within <edges>
435 list< TopoDS_Edge >::iterator eItFwd = edges.begin();
436 for ( ; eItFwd != edges.end(); ++eItFwd )
437 if ( edge.IsSame( *eItFwd ))
439 if ( eItFwd == edges.end()) return list< TopoDS_Edge>();
441 if ( eItFwd->Orientation() >= TopAbs_INTERNAL )
443 // connected INTERNAL edges returned from GetOrderedEdges() are wrongly oriented
444 // so treat each INTERNAL edge separately
445 TopoDS_Edge e = *eItFwd;
447 edges.push_back( e );
451 // get all computed EDGEs connected to <edge>
453 list< TopoDS_Edge >::iterator eItBack = eItFwd, ePrev;
454 TopoDS_Vertex vCommon;
455 TopTools_MapOfShape eAdded; // map used not to add a seam edge twice to <edges>
458 // put edges before <edge> to <edges> back
459 while ( edges.begin() != eItFwd )
460 edges.splice( edges.end(), edges, edges.begin() );
464 while ( ++eItFwd != edges.end() )
466 SMESH_subMesh* sm = helper.GetMesh()->GetSubMesh( *eItFwd );
468 bool connected = TopExp::CommonVertex( *ePrev, *eItFwd, vCommon );
469 bool computed = sm->IsMeshComputed();
470 bool added = addedEdgeSM2Faces[ sm ].count( helper.GetSubShapeID() );
471 bool doubled = !eAdded.Add( *eItFwd );
472 bool orientOK = (( ePrev ->Orientation() < TopAbs_INTERNAL ) ==
473 ( eItFwd->Orientation() < TopAbs_INTERNAL ) );
474 if ( !connected || !computed || !orientOK || added || doubled )
476 // stop advancement; move edges from tail to head
477 while ( edges.back() != *ePrev )
478 edges.splice( edges.begin(), edges, --edges.end() );
484 while ( eItBack != edges.begin() )
488 SMESH_subMesh* sm = helper.GetMesh()->GetSubMesh( *eItBack );
490 bool connected = TopExp::CommonVertex( *ePrev, *eItBack, vCommon );
491 bool computed = sm->IsMeshComputed();
492 bool added = addedEdgeSM2Faces[ sm ].count( helper.GetSubShapeID() );
493 bool doubled = !eAdded.Add( *eItBack );
494 bool orientOK = (( ePrev ->Orientation() < TopAbs_INTERNAL ) ==
495 ( eItBack->Orientation() < TopAbs_INTERNAL ) );
496 if ( !connected || !computed || !orientOK || added || doubled)
499 edges.erase( edges.begin(), ePrev );
503 if ( edges.front() != edges.back() )
505 // assure that the 1st vertex is meshed
506 TopoDS_Edge eLast = edges.back();
507 while ( !SMESH_Algo::VertexNode( SMESH_MesherHelper::IthVertex( 0, edges.front()), helper.GetMeshDS())
509 edges.front() != eLast )
510 edges.splice( edges.end(), edges, edges.begin() );
515 //================================================================================
517 * \brief Make triangulation of a shape precise enough
519 //================================================================================
521 void updateTriangulation( const TopoDS_Shape& shape )
523 // static set< Poly_Triangulation* > updated;
525 // TopLoc_Location loc;
526 // TopExp_Explorer fExp( shape, TopAbs_FACE );
527 // for ( ; fExp.More(); fExp.Next() )
529 // Handle(Poly_Triangulation) triangulation =
530 // BRep_Tool::Triangulation ( TopoDS::Face( fExp.Current() ), loc);
531 // if ( triangulation.IsNull() ||
532 // updated.insert( triangulation.operator->() ).second )
534 // BRepTools::Clean (shape);
537 BRepMesh_IncrementalMesh e(shape, 0.01, true);
539 catch (Standard_Failure)
542 // updated.erase( triangulation.operator->() );
543 // triangulation = BRep_Tool::Triangulation ( TopoDS::Face( fExp.Current() ), loc);
544 // updated.insert( triangulation.operator->() );
548 //================================================================================
550 * \brief Returns a medium node either existing in SMESH of created by NETGEN
551 * \param [in] corner1 - corner node 1
552 * \param [in] corner2 - corner node 2
553 * \param [in] defaultMedium - the node created by NETGEN
554 * \param [in] helper - holder of medium nodes existing in SMESH
555 * \return const SMDS_MeshNode* - the result node
557 //================================================================================
559 const SMDS_MeshNode* mediumNode( const SMDS_MeshNode* corner1,
560 const SMDS_MeshNode* corner2,
561 const SMDS_MeshNode* defaultMedium,
562 const SMESH_MesherHelper* helper)
566 TLinkNodeMap::const_iterator l2n =
567 helper->GetTLinkNodeMap().find( SMESH_TLink( corner1, corner2 ));
568 if ( l2n != helper->GetTLinkNodeMap().end() )
569 defaultMedium = l2n->second;
571 return defaultMedium;
574 //================================================================================
576 * \brief Assure that mesh on given shapes is quadratic
578 //================================================================================
580 // void makeQuadratic( const TopTools_IndexedMapOfShape& shapes,
581 // SMESH_Mesh* mesh )
583 // for ( int i = 1; i <= shapes.Extent(); ++i )
585 // SMESHDS_SubMesh* smDS = mesh->GetMeshDS()->MeshElements( shapes(i) );
586 // if ( !smDS ) continue;
587 // SMDS_ElemIteratorPtr elemIt = smDS->GetElements();
588 // if ( !elemIt->more() ) continue;
589 // const SMDS_MeshElement* e = elemIt->next();
590 // if ( !e || e->IsQuadratic() )
593 // TIDSortedElemSet elems;
594 // elems.insert( e );
595 // while ( elemIt->more() )
596 // elems.insert( elems.end(), elemIt->next() );
598 // SMESH_MeshEditor( mesh ).ConvertToQuadratic( /*3d=*/false, elems, /*biQuad=*/false );
602 //================================================================================
604 * \brief Restrict size of elements on the given edge
606 //================================================================================
608 void setLocalSize(const TopoDS_Edge& edge,
611 const bool overrideMinH = true)
613 if ( size <= std::numeric_limits<double>::min() )
615 Standard_Real u1, u2;
616 Handle(Geom_Curve) curve = BRep_Tool::Curve(edge, u1, u2);
617 if ( curve.IsNull() )
619 TopoDS_Iterator vIt( edge );
620 if ( !vIt.More() ) return;
621 gp_Pnt p = BRep_Tool::Pnt( TopoDS::Vertex( vIt.Value() ));
622 NETGENPlugin_Mesher::RestrictLocalSize( mesh, p.XYZ(), size, overrideMinH );
626 const int nb = (int)( 1.5 * SMESH_Algo::EdgeLength( edge ) / size );
627 Standard_Real delta = (u2-u1)/nb;
628 for(int i=0; i<nb; i++)
630 Standard_Real u = u1 + delta*i;
631 gp_Pnt p = curve->Value(u);
632 NETGENPlugin_Mesher::RestrictLocalSize( mesh, p.XYZ(), size, overrideMinH );
633 netgen::Point3d pi(p.X(), p.Y(), p.Z());
634 double resultSize = mesh.GetH(pi);
635 if ( resultSize - size > 0.1*size )
636 // netgen does restriction iff oldH/newH > 1.2 (localh.cpp:136)
637 NETGENPlugin_Mesher::RestrictLocalSize( mesh, p.XYZ(), resultSize/1.201, overrideMinH );
642 //================================================================================
644 * \brief Return triangle size for a given chordalError and radius of curvature
646 //================================================================================
648 double elemSizeForChordalError( double chordalError, double radius )
650 if ( 2 * radius < chordalError )
652 return Sqrt( 3 ) * Sqrt( chordalError * ( 2 * radius - chordalError ));
657 //================================================================================
659 * \brief Set local size on shapes defined by SetParameters()
661 //================================================================================
663 void NETGENPlugin_Mesher::SetLocalSize( netgen::OCCGeometry& occgeo,
664 netgen::Mesh& ngMesh)
667 std::map<int,double>::const_iterator it;
668 for( it=EdgeId2LocalSize.begin(); it!=EdgeId2LocalSize.end(); it++)
670 int key = (*it).first;
671 double hi = (*it).second;
672 const TopoDS_Shape& shape = ShapesWithLocalSize.FindKey(key);
673 setLocalSize( TopoDS::Edge(shape), hi, ngMesh );
676 for(it=VertexId2LocalSize.begin(); it!=VertexId2LocalSize.end(); it++)
678 int key = (*it).first;
679 double hi = (*it).second;
680 const TopoDS_Shape& shape = ShapesWithLocalSize.FindKey(key);
681 gp_Pnt p = BRep_Tool::Pnt( TopoDS::Vertex(shape) );
682 NETGENPlugin_Mesher::RestrictLocalSize( ngMesh, p.XYZ(), hi );
685 for(it=FaceId2LocalSize.begin(); it!=FaceId2LocalSize.end(); it++)
687 int key = (*it).first;
688 double val = (*it).second;
689 const TopoDS_Shape& shape = ShapesWithLocalSize.FindKey(key);
690 int faceNgID = occgeo.fmap.FindIndex(shape);
693 occgeo.SetFaceMaxH(faceNgID, val);
694 for ( TopExp_Explorer edgeExp( shape, TopAbs_EDGE ); edgeExp.More(); edgeExp.Next() )
695 setLocalSize( TopoDS::Edge( edgeExp.Current() ), val, ngMesh );
697 else if ( !ShapesWithControlPoints.count( key ))
699 SMESHUtils::createPointsSampleFromFace( TopoDS::Face( shape ), val, ControlPoints );
700 ShapesWithControlPoints.insert( key );
704 for(it=SolidId2LocalSize.begin(); it!=SolidId2LocalSize.end(); it++)
706 int key = (*it).first;
707 double val = (*it).second;
708 if ( !ShapesWithControlPoints.count( key ))
710 const TopoDS_Shape& shape = ShapesWithLocalSize.FindKey(key);
711 SMESHUtils::createPointsSampleFromSolid( TopoDS::Solid( shape ), val, ControlPoints );
712 ShapesWithControlPoints.insert( key );
716 if ( !ControlPoints.empty() )
718 for ( size_t i = 0; i < ControlPoints.size(); ++i )
719 NETGENPlugin_Mesher::RestrictLocalSize( ngMesh, ControlPoints[i].XYZ(), ControlPoints[i].Size() );
724 //================================================================================
726 * \brief Restrict local size to achieve a required _chordalError
728 //================================================================================
730 void NETGENPlugin_Mesher::SetLocalSizeForChordalError( netgen::OCCGeometry& occgeo,
731 netgen::Mesh& ngMesh)
733 if ( _chordalError <= 0. )
737 BRepLProp_SLProps surfProp( 2, 1e-6 );
738 const double sizeCoef = 0.95;
740 // find non-planar FACEs with non-constant curvature
741 std::vector<int> fInd;
742 for ( int i = 1; i <= occgeo.fmap.Extent(); ++i )
744 const TopoDS_Face& face = TopoDS::Face( occgeo.fmap( i ));
745 BRepAdaptor_Surface surfAd( face, false );
746 switch ( surfAd.GetType() )
750 case GeomAbs_Cylinder:
752 case GeomAbs_Torus: // constant curvature
754 surfProp.SetSurface( surfAd );
755 surfProp.SetParameters( 0, 0 );
756 double maxCurv = Max( Abs( surfProp.MaxCurvature()), Abs( surfProp.MinCurvature() ));
757 double size = elemSizeForChordalError( _chordalError, 1 / maxCurv );
758 occgeo.SetFaceMaxH( i, size * sizeCoef );
759 // limit size one edges
760 TopTools_MapOfShape edgeMap;
761 for ( TopExp_Explorer eExp( face, TopAbs_EDGE ); eExp.More(); eExp.Next() )
762 if ( edgeMap.Add( eExp.Current() ))
763 setLocalSize( TopoDS::Edge( eExp.Current() ), size, ngMesh, /*overrideMinH=*/false );
767 Handle(Geom_Surface) surf = BRep_Tool::Surface( face, loc );
768 if ( GeomLib_IsPlanarSurface( surf ).IsPlanar() )
777 TopoDS_Compound allFacesComp;
778 b.MakeCompound( allFacesComp );
779 for ( size_t i = 0; i < fInd.size(); ++i )
780 b.Add( allFacesComp, occgeo.fmap( fInd[i] ));
782 // copy the shape to avoid spoiling its triangulation
783 TopoDS_Shape allFacesCompCopy = BRepBuilderAPI_Copy( allFacesComp );
785 // create triangulation with desired chordal error
786 BRepMesh_IncrementalMesh( allFacesCompCopy,
788 /*isRelative = */Standard_False,
789 /*theAngDeflection = */ 0.5,
790 /*isInParallel = */Standard_True);
793 for ( TopExp_Explorer fExp( allFacesCompCopy, TopAbs_FACE ); fExp.More(); fExp.Next() )
795 const TopoDS_Face& face = TopoDS::Face( fExp.Current() );
796 Handle(Poly_Triangulation) triangulation = BRep_Tool::Triangulation ( face, loc );
797 if ( triangulation.IsNull() ) continue;
799 BRepAdaptor_Surface surf( face, false );
800 surfProp.SetSurface( surf );
805 for ( int i = 1; i <= triangulation->NbTriangles(); ++i )
807 Standard_Integer n1,n2,n3;
808 triangulation->Triangles()(i).Get( n1,n2,n3 );
809 p [0] = triangulation->Nodes()(n1).Transformed(loc).XYZ();
810 p [1] = triangulation->Nodes()(n2).Transformed(loc).XYZ();
811 p [2] = triangulation->Nodes()(n3).Transformed(loc).XYZ();
812 uv[0] = triangulation->UVNodes()(n1).XY();
813 uv[1] = triangulation->UVNodes()(n2).XY();
814 uv[2] = triangulation->UVNodes()(n3).XY();
815 surfProp.SetParameters( uv[0].X(), uv[0].Y() );
816 if ( !surfProp.IsCurvatureDefined() )
819 for ( int n = 0; n < 3; ++n ) // get size at triangle nodes
821 surfProp.SetParameters( uv[n].X(), uv[n].Y() );
822 double maxCurv = Max( Abs( surfProp.MaxCurvature()), Abs( surfProp.MinCurvature() ));
823 size[n] = elemSizeForChordalError( _chordalError, 1 / maxCurv );
825 for ( int n1 = 0; n1 < 3; ++n1 ) // limit size along each triangle edge
827 int n2 = ( n1 + 1 ) % 3;
828 double minSize = size[n1], maxSize = size[n2];
829 if ( size[n1] > size[n2] )
830 minSize = size[n2], maxSize = size[n1];
832 if ( maxSize / minSize < 1.2 ) // netgen ignores size difference < 1.2
834 ngMesh.RestrictLocalHLine ( netgen::Point3d( p[n1].X(), p[n1].Y(), p[n1].Z() ),
835 netgen::Point3d( p[n2].X(), p[n2].Y(), p[n2].Z() ),
836 sizeCoef * minSize );
840 gp_XY uvVec( uv[n2] - uv[n1] );
841 double len = ( p[n1] - p[n2] ).Modulus();
842 int nb = int( len / minSize ) + 1;
843 for ( int j = 0; j <= nb; ++j )
845 double r = double( j ) / nb;
846 gp_XY uvj = uv[n1] + r * uvVec;
848 surfProp.SetParameters( uvj.X(), uvj.Y() );
849 double maxCurv = Max( Abs( surfProp.MaxCurvature()), Abs( surfProp.MinCurvature() ));
850 double h = elemSizeForChordalError( _chordalError, 1 / maxCurv );
852 const gp_Pnt& pj = surfProp.Value();
853 netgen::Point3d ngP( pj.X(), pj.Y(), pj.Z());
854 ngMesh.RestrictLocalH( ngP, h * sizeCoef );
863 //================================================================================
865 * \brief Initialize netgen::OCCGeometry with OCCT shape
867 //================================================================================
869 void NETGENPlugin_Mesher::PrepareOCCgeometry(netgen::OCCGeometry& occgeo,
870 const TopoDS_Shape& shape,
872 list< SMESH_subMesh* > * meshedSM,
873 NETGENPlugin_Internals* intern)
875 updateTriangulation( shape );
878 BRepBndLib::Add (shape, bb);
879 double x1,y1,z1,x2,y2,z2;
880 bb.Get (x1,y1,z1,x2,y2,z2);
881 netgen::Point<3> p1 = netgen::Point<3> (x1,y1,z1);
882 netgen::Point<3> p2 = netgen::Point<3> (x2,y2,z2);
883 occgeo.boundingbox = netgen::Box<3> (p1,p2);
885 occgeo.shape = shape;
888 // fill maps of shapes of occgeo with not yet meshed subshapes
890 // get root submeshes
891 list< SMESH_subMesh* > rootSM;
892 const int shapeID = mesh.GetMeshDS()->ShapeToIndex( shape );
893 if ( shapeID > 0 ) { // SMESH_subMesh with ID 0 may exist, don't use it!
894 rootSM.push_back( mesh.GetSubMesh( shape ));
897 for ( TopoDS_Iterator it( shape ); it.More(); it.Next() )
898 rootSM.push_back( mesh.GetSubMesh( it.Value() ));
903 // add subshapes of empty submeshes
904 list< SMESH_subMesh* >::iterator rootIt = rootSM.begin(), rootEnd = rootSM.end();
905 for ( ; rootIt != rootEnd; ++rootIt ) {
906 SMESH_subMesh * root = *rootIt;
907 SMESH_subMeshIteratorPtr smIt = root->getDependsOnIterator(/*includeSelf=*/true,
908 /*complexShapeFirst=*/true);
909 // to find a right orientation of subshapes (PAL20462)
910 TopTools_IndexedMapOfShape subShapes;
911 TopExp::MapShapes(root->GetSubShape(), subShapes);
912 while ( smIt->more() )
914 SMESH_subMesh* sm = smIt->next();
915 TopoDS_Shape shape = sm->GetSubShape();
916 totNbFaces += ( shape.ShapeType() == TopAbs_FACE );
917 if ( intern && intern->isShapeToPrecompute( shape ))
919 if ( !meshedSM || sm->IsEmpty() )
921 if ( shape.ShapeType() != TopAbs_VERTEX )
922 shape = subShapes( subShapes.FindIndex( shape ));// shape -> index -> oriented shape
923 if ( shape.Orientation() >= TopAbs_INTERNAL )
924 shape.Orientation( TopAbs_FORWARD ); // issue 0020676
925 switch ( shape.ShapeType() ) {
926 case TopAbs_FACE : occgeo.fmap.Add( shape ); break;
927 case TopAbs_EDGE : occgeo.emap.Add( shape ); break;
928 case TopAbs_VERTEX: occgeo.vmap.Add( shape ); break;
929 case TopAbs_SOLID :occgeo.somap.Add( shape ); break;
933 // collect submeshes of meshed shapes
936 const int dim = SMESH_Gen::GetShapeDim( shape );
937 meshedSM[ dim ].push_back( sm );
941 occgeo.facemeshstatus.SetSize (totNbFaces);
942 occgeo.facemeshstatus = 0;
943 occgeo.face_maxh_modified.SetSize(totNbFaces);
944 occgeo.face_maxh_modified = 0;
945 occgeo.face_maxh.SetSize(totNbFaces);
946 occgeo.face_maxh = netgen::mparam.maxh;
949 //================================================================================
951 * \brief Return a default min size value suitable for the given geometry.
953 //================================================================================
955 double NETGENPlugin_Mesher::GetDefaultMinSize(const TopoDS_Shape& geom,
956 const double maxSize)
958 updateTriangulation( geom );
962 const int* pi[4] = { &i1, &i2, &i3, &i1 };
965 TopExp_Explorer fExp( geom, TopAbs_FACE );
966 for ( ; fExp.More(); fExp.Next() )
968 Handle(Poly_Triangulation) triangulation =
969 BRep_Tool::Triangulation ( TopoDS::Face( fExp.Current() ), loc);
970 if ( triangulation.IsNull() ) continue;
971 const double fTol = BRep_Tool::Tolerance( TopoDS::Face( fExp.Current() ));
972 const TColgp_Array1OfPnt& points = triangulation->Nodes();
973 const Poly_Array1OfTriangle& trias = triangulation->Triangles();
974 for ( int iT = trias.Lower(); iT <= trias.Upper(); ++iT )
976 trias(iT).Get( i1, i2, i3 );
977 for ( int j = 0; j < 3; ++j )
979 double dist2 = points(*pi[j]).SquareDistance( points( *pi[j+1] ));
980 if ( dist2 < minh && fTol*fTol < dist2 )
982 bb.Add( points(*pi[j]));
986 if ( minh > 0.25 * bb.SquareExtent() ) // simple geometry, rough triangulation
988 minh = 1e-3 * sqrt( bb.SquareExtent());
989 //cout << "BND BOX minh = " <<minh << endl;
993 minh = sqrt( minh ); // triangulation for visualization is rather fine
994 //cout << "TRIANGULATION minh = " <<minh << endl;
996 if ( minh > 0.5 * maxSize )
1002 //================================================================================
1004 * \brief Restrict size of elements at a given point
1006 //================================================================================
1008 void NETGENPlugin_Mesher::RestrictLocalSize(netgen::Mesh& ngMesh,
1011 const bool overrideMinH)
1013 if ( size <= std::numeric_limits<double>::min() )
1015 if ( netgen::mparam.minh > size )
1019 ngMesh.SetMinimalH( size );
1020 netgen::mparam.minh = size;
1024 size = netgen::mparam.minh;
1027 netgen::Point3d pi(p.X(), p.Y(), p.Z());
1028 ngMesh.RestrictLocalH( pi, size );
1031 //================================================================================
1033 * \brief fill ngMesh with nodes and elements of computed submeshes
1035 //================================================================================
1037 bool NETGENPlugin_Mesher::FillNgMesh(netgen::OCCGeometry& occgeom,
1038 netgen::Mesh& ngMesh,
1039 vector<const SMDS_MeshNode*>& nodeVec,
1040 const list< SMESH_subMesh* > & meshedSM,
1041 SMESH_MesherHelper* quadHelper,
1042 SMESH_ProxyMesh::Ptr proxyMesh)
1044 TNode2IdMap nodeNgIdMap;
1045 for ( size_t i = 1; i < nodeVec.size(); ++i )
1046 nodeNgIdMap.insert( make_pair( nodeVec[i], i ));
1048 TopTools_MapOfShape visitedShapes;
1049 map< SMESH_subMesh*, set< int > > visitedEdgeSM2Faces;
1050 set< SMESH_subMesh* > computedSM( meshedSM.begin(), meshedSM.end() );
1052 SMESH_MesherHelper helper (*_mesh);
1054 int faceNgID = ngMesh.GetNFD();
1056 list< SMESH_subMesh* >::const_iterator smIt, smEnd = meshedSM.end();
1057 for ( smIt = meshedSM.begin(); smIt != smEnd; ++smIt )
1059 SMESH_subMesh* sm = *smIt;
1060 if ( !visitedShapes.Add( sm->GetSubShape() ))
1063 const SMESHDS_SubMesh * smDS = sm->GetSubMeshDS();
1064 if ( !smDS ) continue;
1066 switch ( sm->GetSubShape().ShapeType() )
1068 case TopAbs_EDGE: { // EDGE
1069 // ----------------------
1070 TopoDS_Edge geomEdge = TopoDS::Edge( sm->GetSubShape() );
1071 if ( geomEdge.Orientation() >= TopAbs_INTERNAL )
1072 geomEdge.Orientation( TopAbs_FORWARD ); // issue 0020676
1074 // Add ng segments for each not meshed FACE the EDGE bounds
1075 PShapeIteratorPtr fIt = helper.GetAncestors( geomEdge, *sm->GetFather(), TopAbs_FACE );
1076 while ( const TopoDS_Shape * anc = fIt->next() )
1078 faceNgID = occgeom.fmap.FindIndex( *anc );
1080 continue; // meshed face
1082 int faceSMDSId = helper.GetMeshDS()->ShapeToIndex( *anc );
1083 if ( visitedEdgeSM2Faces[ sm ].count( faceSMDSId ))
1084 continue; // already treated EDGE
1086 TopoDS_Face face = TopoDS::Face( occgeom.fmap( faceNgID ));
1087 if ( face.Orientation() >= TopAbs_INTERNAL )
1088 face.Orientation( TopAbs_FORWARD ); // issue 0020676
1090 // get all meshed EDGEs of the FACE connected to geomEdge (issue 0021140)
1091 helper.SetSubShape( face );
1092 list< TopoDS_Edge > edges = getConnectedEdges( geomEdge, face, computedSM, helper,
1093 visitedEdgeSM2Faces );
1094 if ( edges.empty() )
1095 continue; // wrong ancestor?
1097 // find out orientation of <edges> within <face>
1098 TopoDS_Edge eNotSeam = edges.front();
1099 if ( helper.HasSeam() )
1101 list< TopoDS_Edge >::iterator eIt = edges.begin();
1102 while ( helper.IsRealSeam( *eIt )) ++eIt;
1103 if ( eIt != edges.end() )
1106 TopAbs_Orientation fOri = helper.GetSubShapeOri( face, eNotSeam );
1107 bool isForwad = ( fOri == eNotSeam.Orientation() || fOri >= TopAbs_INTERNAL );
1109 // get all nodes from connected <edges>
1110 const bool isQuad = smDS->IsQuadratic();
1111 StdMeshers_FaceSide fSide( face, edges, _mesh, isForwad, isQuad, &helper );
1112 const vector<UVPtStruct>& points = fSide.GetUVPtStruct();
1113 if ( points.empty() )
1114 return false; // invalid node params?
1115 int i, nbSeg = fSide.NbSegments();
1117 // remember EDGEs of fSide to treat only once
1118 for ( int iE = 0; iE < fSide.NbEdges(); ++iE )
1119 visitedEdgeSM2Faces[ helper.GetMesh()->GetSubMesh( fSide.Edge(iE )) ].insert(faceSMDSId);
1121 double otherSeamParam = 0;
1122 bool isSeam = false;
1126 int prevNgId = ngNodeId( points[0].node, ngMesh, nodeNgIdMap );
1128 for ( i = 0; i < nbSeg; ++i )
1130 const UVPtStruct& p1 = points[ i ];
1131 const UVPtStruct& p2 = points[ i+1 ];
1133 if ( p1.node->GetPosition()->GetTypeOfPosition() == SMDS_TOP_VERTEX ) //an EDGE begins
1136 if ( helper.IsRealSeam( p1.node->getshapeId() ))
1138 TopoDS_Edge e = fSide.Edge( fSide.EdgeIndex( 0.5 * ( p1.normParam + p2.normParam )));
1139 isSeam = helper.IsRealSeam( e );
1142 otherSeamParam = helper.GetOtherParam( helper.GetPeriodicIndex() & 1 ? p2.u : p2.v );
1146 netgen::Segment seg;
1149 seg[1] = prevNgId = ngNodeId( p2.node, ngMesh, nodeNgIdMap );
1150 // node param on curve
1151 seg.epgeominfo[ 0 ].dist = p1.param;
1152 seg.epgeominfo[ 1 ].dist = p2.param;
1154 seg.epgeominfo[ 0 ].u = p1.u;
1155 seg.epgeominfo[ 0 ].v = p1.v;
1156 seg.epgeominfo[ 1 ].u = p2.u;
1157 seg.epgeominfo[ 1 ].v = p2.v;
1159 //geomEdge = fSide.Edge( fSide.EdgeIndex( 0.5 * ( p1.normParam + p2.normParam )));
1160 //seg.epgeominfo[ 0 ].edgenr = seg.epgeominfo[ 1 ].edgenr = occgeom.emap.FindIndex( geomEdge );
1162 //seg.epgeominfo[ iEnd ].edgenr = edgeID; // = geom.emap.FindIndex(edge);
1163 seg.si = faceNgID; // = geom.fmap.FindIndex (face);
1164 seg.edgenr = ngMesh.GetNSeg() + 1; // segment id
1165 ngMesh.AddSegment (seg);
1167 SMESH_TNodeXYZ np1( p1.node ), np2( p2.node );
1168 RestrictLocalSize( ngMesh, 0.5*(np1+np2), (np1-np2).Modulus() );
1170 #ifdef DUMP_SEGMENTS
1171 cout << "Segment: " << seg.edgenr << " on SMESH face " << helper.GetMeshDS()->ShapeToIndex( face ) << endl
1172 << "\tface index: " << seg.si << endl
1173 << "\tp1: " << seg[0] << endl
1174 << "\tp2: " << seg[1] << endl
1175 << "\tp0 param: " << seg.epgeominfo[ 0 ].dist << endl
1176 << "\tp0 uv: " << seg.epgeominfo[ 0 ].u <<", "<< seg.epgeominfo[ 0 ].v << endl
1177 //<< "\tp0 edge: " << seg.epgeominfo[ 0 ].edgenr << endl
1178 << "\tp1 param: " << seg.epgeominfo[ 1 ].dist << endl
1179 << "\tp1 uv: " << seg.epgeominfo[ 1 ].u <<", "<< seg.epgeominfo[ 1 ].v << endl;
1180 //<< "\tp1 edge: " << seg.epgeominfo[ 1 ].edgenr << endl;
1184 if ( helper.GetPeriodicIndex() && 1 ) {
1185 seg.epgeominfo[ 0 ].u = otherSeamParam;
1186 seg.epgeominfo[ 1 ].u = otherSeamParam;
1187 swap (seg.epgeominfo[0].v, seg.epgeominfo[1].v);
1189 seg.epgeominfo[ 0 ].v = otherSeamParam;
1190 seg.epgeominfo[ 1 ].v = otherSeamParam;
1191 swap (seg.epgeominfo[0].u, seg.epgeominfo[1].u);
1193 swap( seg[0], seg[1] );
1194 swap( seg.epgeominfo[0].dist, seg.epgeominfo[1].dist );
1195 seg.edgenr = ngMesh.GetNSeg() + 1; // segment id
1196 ngMesh.AddSegment( seg );
1197 #ifdef DUMP_SEGMENTS
1198 cout << "Segment: " << seg.edgenr << endl
1199 << "\t is SEAM (reverse) of the previous. "
1200 << " Other " << (helper.GetPeriodicIndex() && 1 ? "U" : "V")
1201 << " = " << otherSeamParam << endl;
1204 else if ( fOri == TopAbs_INTERNAL )
1206 swap( seg[0], seg[1] );
1207 swap( seg.epgeominfo[0], seg.epgeominfo[1] );
1208 seg.edgenr = ngMesh.GetNSeg() + 1; // segment id
1209 ngMesh.AddSegment( seg );
1210 #ifdef DUMP_SEGMENTS
1211 cout << "Segment: " << seg.edgenr << endl << "\t is REVERSE of the previous" << endl;
1215 } // loop on geomEdge ancestors
1217 if ( quadHelper ) // remember medium nodes of sub-meshes
1219 SMDS_ElemIteratorPtr edges = smDS->GetElements();
1220 while ( edges->more() )
1222 const SMDS_MeshElement* e = edges->next();
1223 if ( !quadHelper->AddTLinks( static_cast< const SMDS_MeshEdge*>( e )))
1229 } // case TopAbs_EDGE
1231 case TopAbs_FACE: { // FACE
1232 // ----------------------
1233 const TopoDS_Face& geomFace = TopoDS::Face( sm->GetSubShape() );
1234 helper.SetSubShape( geomFace );
1235 bool isInternalFace = ( geomFace.Orientation() == TopAbs_INTERNAL );
1237 // Find solids the geomFace bounds
1238 int solidID1 = 0, solidID2 = 0;
1240 PShapeIteratorPtr solidIt = helper.GetAncestors( geomFace, *sm->GetFather(), TopAbs_SOLID);
1241 while ( const TopoDS_Shape * solid = solidIt->next() )
1243 int id = occgeom.somap.FindIndex ( *solid );
1244 if ( solidID1 && id != solidID1 ) solidID2 = id;
1248 if ( proxyMesh && proxyMesh->GetProxySubMesh( geomFace ))
1250 // if a proxy sub-mesh contains temporary faces, then these faces
1251 // should be used to mesh only one SOLID
1252 bool hasTmp = false;
1253 smDS = proxyMesh->GetSubMesh( geomFace );
1254 SMDS_ElemIteratorPtr faces = smDS->GetElements();
1255 while ( faces->more() )
1257 const SMDS_MeshElement* f = faces->next();
1258 if ( proxyMesh->IsTemporary( f ))
1261 std::vector<const SMDS_MeshNode*> fNodes( f->begin_nodes(), f->end_nodes() );
1262 std::vector<const SMDS_MeshElement*> vols;
1263 if ( _mesh->GetMeshDS()->GetElementsByNodes( fNodes, vols, SMDSAbs_Volume ) == 1 )
1265 int geomID = vols[0]->getshapeId();
1266 const TopoDS_Shape& solid = helper.GetMeshDS()->IndexToShape( geomID );
1267 if ( !solid.IsNull() )
1268 solidID1 = occgeom.somap.FindIndex ( solid );
1274 // exclude faces generated by NETGEN from computation of 3D mesh
1275 const int fID = occgeom.fmap.FindIndex( geomFace );
1276 if ( !hasTmp ) // shrunk mesh
1278 // move netgen points according to moved nodes
1279 SMESH_subMeshIteratorPtr smIt = sm->getDependsOnIterator(/*includeSelf=*/true);
1280 while ( smIt->more() )
1282 SMESH_subMesh* sub = smIt->next();
1283 if ( !sub->GetSubMeshDS() ) continue;
1284 SMDS_NodeIteratorPtr nodeIt = sub->GetSubMeshDS()->GetNodes();
1285 while ( nodeIt->more() )
1287 const SMDS_MeshNode* n = nodeIt->next();
1288 int ngID = ngNodeId( n, ngMesh, nodeNgIdMap );
1289 netgen::MeshPoint& ngPoint = ngMesh.Point( ngID );
1290 ngPoint(0) = n->X();
1291 ngPoint(1) = n->Y();
1292 ngPoint(2) = n->Z();
1295 // remove faces near boundary to avoid their overlapping
1296 // with shrunk faces
1297 for ( int i = 1; i <= ngMesh.GetNSE(); ++i )
1299 const netgen::Element2d& elem = ngMesh.SurfaceElement(i);
1300 if ( elem.GetIndex() == fID )
1302 for ( int iN = 0; iN < elem.GetNP(); ++iN )
1303 if ( ngMesh[ elem[ iN ]].Type() != netgen::SURFACEPOINT )
1305 ngMesh.DeleteSurfaceElement( i );
1314 ngMesh.AddFaceDescriptor( netgen::FaceDescriptor( faceNgID,/*solid1=*/0,/*solid2=*/0,0 ));
1315 for (int i = 1; i <= ngMesh.GetNSE(); ++i )
1317 const netgen::Element2d& elem = ngMesh.SurfaceElement(i);
1318 if ( elem.GetIndex() == fID )
1319 const_cast< netgen::Element2d& >( elem ).SetIndex( faceNgID );
1323 // Add ng face descriptors of meshed faces
1325 ngMesh.AddFaceDescriptor( netgen::FaceDescriptor( faceNgID, solidID1, solidID2, 0 ));
1327 // if second oreder is required, even already meshed faces must be passed to NETGEN
1328 int fID = occgeom.fmap.Add( geomFace );
1329 if ( occgeom.facemeshstatus.Size() < fID ) occgeom.facemeshstatus.SetSize( fID );
1330 occgeom.facemeshstatus[ fID-1 ] = netgen::FACE_MESHED_OK;
1331 while ( fID < faceNgID ) // geomFace is already in occgeom.fmap, add a copy
1333 fID = occgeom.fmap.Add( BRepBuilderAPI_Copy( geomFace, /*copyGeom=*/false ));
1334 if ( occgeom.facemeshstatus.Size() < fID ) occgeom.facemeshstatus.SetSize( fID );
1335 occgeom.facemeshstatus[ fID-1 ] = netgen::FACE_MESHED_OK;
1337 // Problem with the second order in a quadrangular mesh remains.
1338 // 1) All quadrangles generated by NETGEN are moved to an inexistent face
1339 // by FillSMesh() (find "AddFaceDescriptor")
1340 // 2) Temporary triangles generated by StdMeshers_QuadToTriaAdaptor
1341 // are on faces where quadrangles were.
1342 // Due to these 2 points, wrong geom faces are used while conversion to quadratic
1343 // of the mentioned above quadrangles and triangles
1345 // Orient the face correctly in solidID1 (issue 0020206)
1346 bool reverse = false;
1348 TopoDS_Shape solid = occgeom.somap( solidID1 );
1349 TopAbs_Orientation faceOriInSolid = helper.GetSubShapeOri( solid, geomFace );
1350 if ( faceOriInSolid >= 0 )
1352 helper.IsReversedSubMesh( TopoDS::Face( geomFace.Oriented( faceOriInSolid )));
1355 // Add surface elements
1357 netgen::Element2d tri(3);
1358 tri.SetIndex( faceNgID );
1359 SMESH_TNodeXYZ xyz[3];
1361 #ifdef DUMP_TRIANGLES
1362 cout << "SMESH face " << helper.GetMeshDS()->ShapeToIndex( geomFace )
1363 << " internal="<<isInternalFace << endl;
1366 SMDS_ElemIteratorPtr faces = smDS->GetElements();
1367 while ( faces->more() )
1369 const SMDS_MeshElement* f = faces->next();
1370 if ( f->NbNodes() % 3 != 0 ) // not triangle
1372 PShapeIteratorPtr solidIt=helper.GetAncestors(geomFace,*sm->GetFather(),TopAbs_SOLID);
1373 if ( const TopoDS_Shape * solid = solidIt->next() )
1374 sm = _mesh->GetSubMesh( *solid );
1375 SMESH_BadInputElements* badElems =
1376 new SMESH_BadInputElements( helper.GetMeshDS(), COMPERR_BAD_INPUT_MESH,
1377 "Not triangle sub-mesh");
1379 sm->GetComputeError().reset( badElems );
1383 for ( int i = 0; i < 3; ++i )
1385 const SMDS_MeshNode* node = f->GetNode( i ), * inFaceNode=0;
1388 // get node UV on face
1389 int shapeID = node->getshapeId();
1390 if ( helper.IsSeamShape( shapeID ))
1392 if ( helper.IsSeamShape( f->GetNodeWrap( i+1 )->getshapeId() ))
1393 inFaceNode = f->GetNodeWrap( i-1 );
1395 inFaceNode = f->GetNodeWrap( i+1 );
1397 gp_XY uv = helper.GetNodeUV( geomFace, node, inFaceNode );
1399 int ind = reverse ? 3-i : i+1;
1400 tri.GeomInfoPi(ind).u = uv.X();
1401 tri.GeomInfoPi(ind).v = uv.Y();
1402 tri.PNum (ind) = ngNodeId( node, ngMesh, nodeNgIdMap );
1405 // pass a triangle size to NG size-map
1406 double size = ( ( xyz[0] - xyz[1] ).Modulus() +
1407 ( xyz[1] - xyz[2] ).Modulus() +
1408 ( xyz[2] - xyz[0] ).Modulus() ) / 3;
1409 gp_XYZ gc = ( xyz[0] + xyz[1] + xyz[2] ) / 3;
1410 RestrictLocalSize( ngMesh, gc, size, /*overrideMinH=*/false );
1412 ngMesh.AddSurfaceElement (tri);
1413 #ifdef DUMP_TRIANGLES
1414 cout << tri << endl;
1417 if ( isInternalFace )
1419 swap( tri[1], tri[2] );
1420 ngMesh.AddSurfaceElement (tri);
1421 #ifdef DUMP_TRIANGLES
1422 cout << tri << endl;
1427 if ( quadHelper ) // remember medium nodes of sub-meshes
1429 SMDS_ElemIteratorPtr faces = smDS->GetElements();
1430 while ( faces->more() )
1432 const SMDS_MeshElement* f = faces->next();
1433 if ( !quadHelper->AddTLinks( static_cast< const SMDS_MeshFace*>( f )))
1439 } // case TopAbs_FACE
1441 case TopAbs_VERTEX: { // VERTEX
1442 // --------------------------
1443 // issue 0021405. Add node only if a VERTEX is shared by a not meshed EDGE,
1444 // else netgen removes a free node and nodeVector becomes invalid
1445 PShapeIteratorPtr ansIt = helper.GetAncestors( sm->GetSubShape(),
1449 while ( const TopoDS_Shape* e = ansIt->next() )
1451 SMESH_subMesh* eSub = helper.GetMesh()->GetSubMesh( *e );
1452 if (( toAdd = ( eSub->IsEmpty() && !SMESH_Algo::isDegenerated( TopoDS::Edge( *e )))))
1457 SMDS_NodeIteratorPtr nodeIt = smDS->GetNodes();
1458 if ( nodeIt->more() )
1459 ngNodeId( nodeIt->next(), ngMesh, nodeNgIdMap );
1465 } // loop on submeshes
1468 nodeVec.resize( ngMesh.GetNP() + 1 );
1469 TNode2IdMap::iterator node_NgId, nodeNgIdEnd = nodeNgIdMap.end();
1470 for ( node_NgId = nodeNgIdMap.begin(); node_NgId != nodeNgIdEnd; ++node_NgId)
1471 nodeVec[ node_NgId->second ] = node_NgId->first;
1476 //================================================================================
1478 * \brief Duplicate mesh faces on internal geom faces
1480 //================================================================================
1482 void NETGENPlugin_Mesher::FixIntFaces(const netgen::OCCGeometry& occgeom,
1483 netgen::Mesh& ngMesh,
1484 NETGENPlugin_Internals& internalShapes)
1486 SMESHDS_Mesh* meshDS = internalShapes.getMesh().GetMeshDS();
1488 // find ng indices of internal faces
1490 for ( int ngFaceID = 1; ngFaceID <= occgeom.fmap.Extent(); ++ngFaceID )
1492 int smeshID = meshDS->ShapeToIndex( occgeom.fmap( ngFaceID ));
1493 if ( internalShapes.isInternalShape( smeshID ))
1494 ngFaceIds.insert( ngFaceID );
1496 if ( !ngFaceIds.empty() )
1499 int i, nbFaces = ngMesh.GetNSE();
1500 for ( i = 1; i <= nbFaces; ++i)
1502 netgen::Element2d elem = ngMesh.SurfaceElement(i);
1503 if ( ngFaceIds.count( elem.GetIndex() ))
1505 swap( elem[1], elem[2] );
1506 ngMesh.AddSurfaceElement (elem);
1512 //================================================================================
1514 * \brief Tries to heal the mesh on a FACE. The FACE is supposed to be partially
1515 * meshed due to NETGEN failure
1516 * \param [in] occgeom - geometry
1517 * \param [in,out] ngMesh - the mesh to fix
1518 * \param [inout] faceID - ID of the FACE to fix the mesh on
1519 * \return bool - is mesh is or becomes OK
1521 //================================================================================
1523 bool NETGENPlugin_Mesher::FixFaceMesh(const netgen::OCCGeometry& occgeom,
1524 netgen::Mesh& ngMesh,
1527 // we address a case where the FACE is almost fully meshed except small holes
1528 // of usually triangular shape at FACE boundary (IPAL52861)
1530 // The case appeared to be not simple: holes only look triangular but
1531 // indeed are a self intersecting polygon. A reason of the bug was in coincident
1532 // NG points on a seam edge. But the code below is very nice, leave it for
1537 if ( occgeom.fmap.Extent() < faceID )
1539 //const TopoDS_Face& face = TopoDS::Face( occgeom.fmap( faceID ));
1541 // find free links on the FACE
1542 NCollection_Map<Link> linkMap;
1543 for ( int iF = 1; iF <= ngMesh.GetNSE(); ++iF )
1545 const netgen::Element2d& elem = ngMesh.SurfaceElement(iF);
1546 if ( faceID != elem.GetIndex() )
1548 int n0 = elem[ elem.GetNP() - 1 ];
1549 for ( int i = 0; i < elem.GetNP(); ++i )
1552 Link link( n0, n1 );
1553 if ( !linkMap.Add( link ))
1554 linkMap.Remove( link );
1558 // add/remove boundary links
1559 for ( int iSeg = 1; iSeg <= ngMesh.GetNSeg(); ++iSeg )
1561 const netgen::Segment& seg = ngMesh.LineSegment( iSeg );
1562 if ( seg.si != faceID ) // !edgeIDs.Contains( seg.edgenr ))
1564 Link link( seg[1], seg[0] ); // reverse!!!
1565 if ( !linkMap.Add( link ))
1566 linkMap.Remove( link );
1568 if ( linkMap.IsEmpty() )
1570 if ( linkMap.Extent() < 3 )
1573 // make triangles of the links
1575 netgen::Element2d tri(3);
1576 tri.SetIndex ( faceID );
1578 NCollection_Map<Link>::Iterator linkIt( linkMap );
1579 Link link1 = linkIt.Value();
1580 // look for a link connected to link1
1581 NCollection_Map<Link>::Iterator linkIt2 = linkIt;
1582 for ( linkIt2.Next(); linkIt2.More(); linkIt2.Next() )
1584 const Link& link2 = linkIt2.Value();
1585 if ( link2.IsConnected( link1 ))
1587 // look for a link connected to both link1 and link2
1588 NCollection_Map<Link>::Iterator linkIt3 = linkIt2;
1589 for ( linkIt3.Next(); linkIt3.More(); linkIt3.Next() )
1591 const Link& link3 = linkIt3.Value();
1592 if ( link3.IsConnected( link1 ) &&
1593 link3.IsConnected( link2 ) )
1598 tri[2] = ( link2.Contains( link1.n1 ) ? link2.n1 : link3.n1 );
1599 if ( tri[0] == tri[2] || tri[1] == tri[2] )
1601 ngMesh.AddSurfaceElement( tri );
1603 // prepare for the next tria search
1604 if ( linkMap.Extent() == 3 )
1606 linkMap.Remove( link3 );
1607 linkMap.Remove( link2 );
1609 linkMap.Remove( link1 );
1610 link1 = linkIt.Value();
1623 //================================================================================
1624 // define gp_XY_Subtracted pointer to function calling gp_XY::Subtracted(gp_XY)
1625 gp_XY_FunPtr(Subtracted);
1626 //gp_XY_FunPtr(Added);
1628 //================================================================================
1630 * \brief Evaluate distance between two 2d points along the surface
1632 //================================================================================
1634 double evalDist( const gp_XY& uv1,
1636 const Handle(Geom_Surface)& surf,
1637 const int stopHandler=-1)
1639 if ( stopHandler > 0 ) // continue recursion
1641 gp_XY mid = SMESH_MesherHelper::GetMiddleUV( surf, uv1, uv2 );
1642 return evalDist( uv1,mid, surf, stopHandler-1 ) + evalDist( mid,uv2, surf, stopHandler-1 );
1644 double dist3D = surf->Value( uv1.X(), uv1.Y() ).Distance( surf->Value( uv2.X(), uv2.Y() ));
1645 if ( stopHandler == 0 ) // stop recursion
1648 // start recursion if necessary
1649 double dist2D = SMESH_MesherHelper::ApplyIn2D(surf, uv1, uv2, gp_XY_Subtracted, 0).Modulus();
1650 if ( fabs( dist3D - dist2D ) < dist2D * 1e-10 )
1651 return dist3D; // equal parametrization of a planar surface
1653 return evalDist( uv1, uv2, surf, 3 ); // start recursion
1656 //================================================================================
1658 * \brief Data of vertex internal in geom face
1660 //================================================================================
1664 gp_XY uv; //!< UV in face parametric space
1665 int ngId; //!< ng id of corresponding node
1666 gp_XY uvClose; //!< UV of closest boundary node
1667 int ngIdClose; //!< ng id of closest boundary node
1670 //================================================================================
1672 * \brief Data of vertex internal in solid
1674 //================================================================================
1678 int ngId; //!< ng id of corresponding node
1679 int ngIdClose; //!< ng id of closest 2d mesh element
1680 int ngIdCloseN; //!< ng id of closest node of the closest 2d mesh element
1683 inline double dist2( const netgen::MeshPoint& p1, const netgen::MeshPoint& p2 )
1685 return gp_Pnt( NGPOINT_COORDS(p1)).SquareDistance( gp_Pnt( NGPOINT_COORDS(p2)));
1688 // inline double dist2(const netgen::MeshPoint& p, const SMDS_MeshNode* n )
1690 // return gp_Pnt( NGPOINT_COORDS(p)).SquareDistance( SMESH_NodeXYZ(n));
1694 //================================================================================
1696 * \brief Make netgen take internal vertices in faces into account by adding
1697 * segments including internal vertices
1699 * This function works in supposition that 1D mesh is already computed in ngMesh
1701 //================================================================================
1703 void NETGENPlugin_Mesher::AddIntVerticesInFaces(const netgen::OCCGeometry& occgeom,
1704 netgen::Mesh& ngMesh,
1705 vector<const SMDS_MeshNode*>& nodeVec,
1706 NETGENPlugin_Internals& internalShapes)
1708 if ((int) nodeVec.size() < ngMesh.GetNP() )
1709 nodeVec.resize( ngMesh.GetNP(), 0 );
1711 SMESHDS_Mesh* meshDS = internalShapes.getMesh().GetMeshDS();
1712 SMESH_MesherHelper helper( internalShapes.getMesh() );
1714 const map<int,list<int> >& face2Vert = internalShapes.getFacesWithVertices();
1715 map<int,list<int> >::const_iterator f2v = face2Vert.begin();
1716 for ( ; f2v != face2Vert.end(); ++f2v )
1718 const TopoDS_Face& face = TopoDS::Face( meshDS->IndexToShape( f2v->first ));
1719 if ( face.IsNull() ) continue;
1720 int faceNgID = occgeom.fmap.FindIndex (face);
1721 if ( faceNgID < 0 ) continue;
1723 TopLoc_Location loc;
1724 Handle(Geom_Surface) surf = BRep_Tool::Surface(face,loc);
1726 helper.SetSubShape( face );
1727 helper.SetElementsOnShape( true );
1729 // Get data of internal vertices and add them to ngMesh
1731 multimap< double, TIntVData > dist2VData; // sort vertices by distance from boundary nodes
1733 int i, nbSegInit = ngMesh.GetNSeg();
1735 // boundary characteristics
1736 double totSegLen2D = 0;
1739 const list<int>& iVertices = f2v->second;
1740 list<int>::const_iterator iv = iVertices.begin();
1741 for ( int nbV = 0; iv != iVertices.end(); ++iv, nbV++ )
1744 // get node on vertex
1745 const TopoDS_Vertex V = TopoDS::Vertex( meshDS->IndexToShape( *iv ));
1746 const SMDS_MeshNode * nV = SMESH_Algo::VertexNode( V, meshDS );
1749 SMESH_subMesh* sm = helper.GetMesh()->GetSubMesh( V );
1750 sm->ComputeStateEngine( SMESH_subMesh::COMPUTE );
1751 nV = SMESH_Algo::VertexNode( V, meshDS );
1752 if ( !nV ) continue;
1755 netgen::MeshPoint mp( netgen::Point<3> (nV->X(), nV->Y(), nV->Z()) );
1756 ngMesh.AddPoint ( mp, 1, netgen::EDGEPOINT );
1757 vData.ngId = ngMesh.GetNP();
1758 nodeVec.push_back( nV );
1762 vData.uv = helper.GetNodeUV( face, nV, 0, &uvOK );
1763 if ( !uvOK ) helper.CheckNodeUV( face, nV, vData.uv, BRep_Tool::Tolerance(V),/*force=*/1);
1765 // loop on all segments of the face to find the node closest to vertex and to count
1766 // average segment 2d length
1767 double closeDist2 = numeric_limits<double>::max(), dist2;
1769 for (i = 1; i <= ngMesh.GetNSeg(); ++i)
1771 netgen::Segment & seg = ngMesh.LineSegment(i);
1772 if ( seg.si != faceNgID ) continue;
1774 for ( int iEnd = 0; iEnd < 2; ++iEnd)
1776 uv[iEnd].SetCoord( seg.epgeominfo[iEnd].u, seg.epgeominfo[iEnd].v );
1777 if ( ngIdLast == seg[ iEnd ] ) continue;
1778 dist2 = helper.ApplyIn2D(surf, uv[iEnd], vData.uv, gp_XY_Subtracted,0).SquareModulus();
1779 if ( dist2 < closeDist2 )
1780 vData.ngIdClose = seg[ iEnd ], vData.uvClose = uv[iEnd], closeDist2 = dist2;
1781 ngIdLast = seg[ iEnd ];
1785 totSegLen2D += helper.ApplyIn2D(surf, uv[0], uv[1], gp_XY_Subtracted, false).Modulus();
1789 dist2VData.insert( make_pair( closeDist2, vData ));
1792 if ( totNbSeg == 0 ) break;
1793 double avgSegLen2d = totSegLen2D / totNbSeg;
1795 // Loop on vertices to add segments
1797 multimap< double, TIntVData >::iterator dist_vData = dist2VData.begin();
1798 for ( ; dist_vData != dist2VData.end(); ++dist_vData )
1800 double closeDist2 = dist_vData->first, dist2;
1801 TIntVData & vData = dist_vData->second;
1803 // try to find more close node among segments added for internal vertices
1804 for (i = nbSegInit+1; i <= ngMesh.GetNSeg(); ++i)
1806 netgen::Segment & seg = ngMesh.LineSegment(i);
1807 if ( seg.si != faceNgID ) continue;
1809 for ( int iEnd = 0; iEnd < 2; ++iEnd)
1811 uv[iEnd].SetCoord( seg.epgeominfo[iEnd].u, seg.epgeominfo[iEnd].v );
1812 dist2 = helper.ApplyIn2D(surf, uv[iEnd], vData.uv, gp_XY_Subtracted,0).SquareModulus();
1813 if ( dist2 < closeDist2 )
1814 vData.ngIdClose = seg[ iEnd ], vData.uvClose = uv[iEnd], closeDist2 = dist2;
1817 // decide whether to use the closest node as the second end of segment or to
1818 // create a new point
1819 int segEnd1 = vData.ngId;
1820 int segEnd2 = vData.ngIdClose; // to use closest node
1821 gp_XY uvV = vData.uv, uvP = vData.uvClose;
1822 double segLenHint = ngMesh.GetH( ngMesh.Point( vData.ngId ));
1823 double nodeDist2D = sqrt( closeDist2 );
1824 double nodeDist3D = evalDist( vData.uv, vData.uvClose, surf );
1825 bool avgLenOK = ( avgSegLen2d < 0.75 * nodeDist2D );
1826 bool hintLenOK = ( segLenHint < 0.75 * nodeDist3D );
1827 //cout << "uvV " << uvV.X() <<","<<uvV.Y() << " ";
1828 if ( hintLenOK || avgLenOK )
1830 // create a point between the closest node and V
1833 double r = min( 0.5, ( hintLenOK ? segLenHint/nodeDist3D : avgSegLen2d/nodeDist2D ));
1834 // direction from V to closet node in 2D
1835 gp_Dir2d v2n( helper.ApplyIn2D(surf, uvP, uvV, gp_XY_Subtracted, false ));
1837 uvP = vData.uv + r * nodeDist2D * v2n.XY();
1838 gp_Pnt P = surf->Value( uvP.X(), uvP.Y() ).Transformed( loc );
1840 netgen::MeshPoint mp( netgen::Point<3> (P.X(), P.Y(), P.Z()));
1841 ngMesh.AddPoint ( mp, 1, netgen::EDGEPOINT );
1842 segEnd2 = ngMesh.GetNP();
1843 //cout << "Middle " << r << " uv " << uvP.X() << "," << uvP.Y() << "( " << ngMesh.Point(segEnd2).X()<<","<<ngMesh.Point(segEnd2).Y()<<","<<ngMesh.Point(segEnd2).Z()<<" )"<< endl;
1844 SMDS_MeshNode * nP = helper.AddNode(P.X(), P.Y(), P.Z());
1845 nodeVec.push_back( nP );
1847 //else cout << "at Node " << " uv " << uvP.X() << "," << uvP.Y() << endl;
1850 netgen::Segment seg;
1852 if ( segEnd1 > segEnd2 ) swap( segEnd1, segEnd2 ), swap( uvV, uvP );
1853 seg[0] = segEnd1; // ng node id
1854 seg[1] = segEnd2; // ng node id
1855 seg.edgenr = ngMesh.GetNSeg() + 1;// segment id
1858 seg.epgeominfo[ 0 ].dist = 0; // param on curve
1859 seg.epgeominfo[ 0 ].u = uvV.X();
1860 seg.epgeominfo[ 0 ].v = uvV.Y();
1861 seg.epgeominfo[ 1 ].dist = 1; // param on curve
1862 seg.epgeominfo[ 1 ].u = uvP.X();
1863 seg.epgeominfo[ 1 ].v = uvP.Y();
1865 // seg.epgeominfo[ 0 ].edgenr = 10; // = geom.emap.FindIndex(edge);
1866 // seg.epgeominfo[ 1 ].edgenr = 10; // = geom.emap.FindIndex(edge);
1868 ngMesh.AddSegment (seg);
1870 // add reverse segment
1871 swap( seg[0], seg[1] );
1872 swap( seg.epgeominfo[0], seg.epgeominfo[1] );
1873 seg.edgenr = ngMesh.GetNSeg() + 1; // segment id
1874 ngMesh.AddSegment (seg);
1880 //================================================================================
1882 * \brief Make netgen take internal vertices in solids into account by adding
1883 * faces including internal vertices
1885 * This function works in supposition that 2D mesh is already computed in ngMesh
1887 //================================================================================
1889 void NETGENPlugin_Mesher::AddIntVerticesInSolids(const netgen::OCCGeometry& occgeom,
1890 netgen::Mesh& ngMesh,
1891 vector<const SMDS_MeshNode*>& nodeVec,
1892 NETGENPlugin_Internals& internalShapes)
1894 #ifdef DUMP_TRIANGLES_SCRIPT
1895 // create a python script making a mesh containing triangles added for internal vertices
1896 ofstream py(DUMP_TRIANGLES_SCRIPT);
1897 py << "import SMESH"<< endl
1898 << "from salome.smesh import smeshBuilder"<<endl
1899 << "smesh = smeshBuilder.New()"<<endl
1900 << "m = smesh.Mesh(name='triangles')" << endl;
1902 if ((int) nodeVec.size() < ngMesh.GetNP() )
1903 nodeVec.resize( ngMesh.GetNP(), 0 );
1905 SMESHDS_Mesh* meshDS = internalShapes.getMesh().GetMeshDS();
1906 SMESH_MesherHelper helper( internalShapes.getMesh() );
1908 const map<int,list<int> >& so2Vert = internalShapes.getSolidsWithVertices();
1909 map<int,list<int> >::const_iterator s2v = so2Vert.begin();
1910 for ( ; s2v != so2Vert.end(); ++s2v )
1912 const TopoDS_Shape& solid = meshDS->IndexToShape( s2v->first );
1913 if ( solid.IsNull() ) continue;
1914 int solidNgID = occgeom.somap.FindIndex (solid);
1915 if ( solidNgID < 0 && !occgeom.somap.IsEmpty() ) continue;
1917 helper.SetSubShape( solid );
1918 helper.SetElementsOnShape( true );
1920 // find ng indices of faces within the solid
1922 for (TopExp_Explorer fExp(solid, TopAbs_FACE); fExp.More(); fExp.Next() )
1923 ngFaceIds.insert( occgeom.fmap.FindIndex( fExp.Current() ));
1924 if ( ngFaceIds.size() == 1 && *ngFaceIds.begin() == 0 )
1925 ngFaceIds.insert( 1 );
1927 // Get data of internal vertices and add them to ngMesh
1929 multimap< double, TIntVSoData > dist2VData; // sort vertices by distance from ng faces
1931 int i, nbFaceInit = ngMesh.GetNSE();
1933 // boundary characteristics
1934 double totSegLen = 0;
1937 const list<int>& iVertices = s2v->second;
1938 list<int>::const_iterator iv = iVertices.begin();
1939 for ( int nbV = 0; iv != iVertices.end(); ++iv, nbV++ )
1942 const TopoDS_Vertex V = TopoDS::Vertex( meshDS->IndexToShape( *iv ));
1944 // get node on vertex
1945 const SMDS_MeshNode * nV = SMESH_Algo::VertexNode( V, meshDS );
1948 SMESH_subMesh* sm = helper.GetMesh()->GetSubMesh( V );
1949 sm->ComputeStateEngine( SMESH_subMesh::COMPUTE );
1950 nV = SMESH_Algo::VertexNode( V, meshDS );
1951 if ( !nV ) continue;
1954 netgen::MeshPoint mpV( netgen::Point<3> (nV->X(), nV->Y(), nV->Z()) );
1955 ngMesh.AddPoint ( mpV, 1, netgen::FIXEDPOINT );
1956 vData.ngId = ngMesh.GetNP();
1957 nodeVec.push_back( nV );
1959 // loop on all 2d elements to find the one closest to vertex and to count
1960 // average segment length
1961 double closeDist2 = numeric_limits<double>::max(), avgDist2;
1962 for (i = 1; i <= ngMesh.GetNSE(); ++i)
1964 const netgen::Element2d& elem = ngMesh.SurfaceElement(i);
1965 if ( !ngFaceIds.count( elem.GetIndex() )) continue;
1967 multimap< double, int> dist2nID; // sort nodes of element by distance from V
1968 for ( int j = 0; j < elem.GetNP(); ++j)
1970 netgen::MeshPoint mp = ngMesh.Point( elem[j] );
1971 double d2 = dist2( mpV, mp );
1972 dist2nID.insert( make_pair( d2, elem[j] ));
1973 avgDist2 += d2 / elem.GetNP();
1975 totNbSeg++, totSegLen+= sqrt( dist2( mp, ngMesh.Point( elem[(j+1)%elem.GetNP()])));
1977 double dist = dist2nID.begin()->first; //avgDist2;
1978 if ( dist < closeDist2 )
1979 vData.ngIdClose= i, vData.ngIdCloseN= dist2nID.begin()->second, closeDist2= dist;
1981 dist2VData.insert( make_pair( closeDist2, vData ));
1984 if ( totNbSeg == 0 ) break;
1985 double avgSegLen = totSegLen / totNbSeg;
1987 // Loop on vertices to add triangles
1989 multimap< double, TIntVSoData >::iterator dist_vData = dist2VData.begin();
1990 for ( ; dist_vData != dist2VData.end(); ++dist_vData )
1992 double closeDist2 = dist_vData->first;
1993 TIntVSoData & vData = dist_vData->second;
1995 const netgen::MeshPoint& mpV = ngMesh.Point( vData.ngId );
1997 // try to find more close face among ones added for internal vertices
1998 for (i = nbFaceInit+1; i <= ngMesh.GetNSE(); ++i)
2000 double avgDist2 = 0;
2001 multimap< double, int> dist2nID;
2002 const netgen::Element2d& elem = ngMesh.SurfaceElement(i);
2003 for ( int j = 0; j < elem.GetNP(); ++j)
2005 double d = dist2( mpV, ngMesh.Point( elem[j] ));
2006 dist2nID.insert( make_pair( d, elem[j] ));
2007 avgDist2 += d / elem.GetNP();
2008 if ( avgDist2 < closeDist2 )
2009 vData.ngIdClose= i, vData.ngIdCloseN= dist2nID.begin()->second, closeDist2= avgDist2;
2012 // sort nodes of the closest face by angle with vector from V to the closest node
2013 const double tol = numeric_limits<double>::min();
2014 map< double, int > angle2ID;
2015 const netgen::Element2d& closeFace = ngMesh.SurfaceElement( vData.ngIdClose );
2016 netgen::MeshPoint mp[2];
2017 mp[0] = ngMesh.Point( vData.ngIdCloseN );
2018 gp_XYZ p1( NGPOINT_COORDS( mp[0] ));
2019 gp_XYZ pV( NGPOINT_COORDS( mpV ));
2020 gp_Vec v2p1( pV, p1 );
2021 double distN1 = v2p1.Magnitude();
2022 if ( distN1 <= tol ) continue;
2024 for ( int j = 0; j < closeFace.GetNP(); ++j)
2026 mp[1] = ngMesh.Point( closeFace[j] );
2027 gp_Vec v2p( pV, gp_Pnt( NGPOINT_COORDS( mp[1] )) );
2028 angle2ID.insert( make_pair( v2p1.Angle( v2p ), closeFace[j]));
2030 // get node with angle of 60 degrees or greater
2031 map< double, int >::iterator angle_id = angle2ID.lower_bound( 60. * M_PI / 180. );
2032 if ( angle_id == angle2ID.end() ) angle_id = --angle2ID.end();
2033 const double minAngle = 30. * M_PI / 180.;
2034 const double angle = angle_id->first;
2035 bool angleOK = ( angle > minAngle );
2037 // find points to create a triangle
2038 netgen::Element2d tri(3);
2040 tri[0] = vData.ngId;
2041 tri[1] = vData.ngIdCloseN; // to use the closest nodes
2042 tri[2] = angle_id->second; // to use the node with best angle
2044 // decide whether to use the closest node and the node with best angle or to create new ones
2045 for ( int isBestAngleN = 0; isBestAngleN < 2; ++isBestAngleN )
2047 bool createNew = !angleOK; //, distOK = true;
2049 int triInd = isBestAngleN ? 2 : 1;
2050 mp[isBestAngleN] = ngMesh.Point( tri[triInd] );
2055 double distN2 = sqrt( dist2( mpV, mp[isBestAngleN]));
2056 createNew = ( fabs( distN2 - distN1 ) > 0.25 * distN1 );
2058 else if ( angle < tol )
2060 v2p1.SetX( v2p1.X() + 1e-3 );
2066 double segLenHint = ngMesh.GetH( ngMesh.Point( vData.ngId ));
2067 bool avgLenOK = ( avgSegLen < 0.75 * distN1 );
2068 bool hintLenOK = ( segLenHint < 0.75 * distN1 );
2069 createNew = (createNew || avgLenOK || hintLenOK );
2070 // we create a new node not closer than 0.5 to the closest face
2071 // in order not to clash with other close face
2072 double r = min( 0.5, ( hintLenOK ? segLenHint : avgSegLen ) / distN1 );
2073 distFromV = r * distN1;
2077 // create a new point, between the node and the vertex if angleOK
2078 gp_XYZ p( NGPOINT_COORDS( mp[isBestAngleN] ));
2079 gp_Vec v2p( pV, p ); v2p.Normalize();
2080 if ( isBestAngleN && !angleOK )
2081 p = p1 + gp_Dir( v2p.XYZ() - v2p1.XYZ()).XYZ() * distN1 * 0.95;
2083 p = pV + v2p.XYZ() * distFromV;
2085 if ( !isBestAngleN ) p1 = p, distN1 = distFromV;
2087 mp[isBestAngleN].SetPoint( netgen::Point<3> (p.X(), p.Y(), p.Z()));
2088 ngMesh.AddPoint ( mp[isBestAngleN], 1, netgen::SURFACEPOINT );
2089 tri[triInd] = ngMesh.GetNP();
2090 nodeVec.push_back( helper.AddNode( p.X(), p.Y(), p.Z()) );
2093 ngMesh.AddSurfaceElement (tri);
2094 swap( tri[1], tri[2] );
2095 ngMesh.AddSurfaceElement (tri);
2097 #ifdef DUMP_TRIANGLES_SCRIPT
2098 py << "n1 = m.AddNode( "<< mpV(0)<<", "<< mpV(1)<<", "<< mpV(2)<<") "<< endl
2099 << "n2 = m.AddNode( "<< mp[0](0)<<", "<< mp[0](1)<<", "<< mp[0](2)<<") "<< endl
2100 << "n3 = m.AddNode( "<< mp[1](0)<<", "<< mp[1](1)<<", "<< mp[1](2)<<" )" << endl
2101 << "m.AddFace([n1,n2,n3])" << endl;
2103 } // loop on internal vertices of a solid
2105 } // loop on solids with internal vertices
2108 //================================================================================
2110 * \brief Fill netgen mesh with segments of a FACE
2111 * \param ngMesh - netgen mesh
2112 * \param geom - container of OCCT geometry to mesh
2113 * \param wires - data of nodes on FACE boundary
2114 * \param helper - mesher helper holding the FACE
2115 * \param nodeVec - vector of nodes in which node index == netgen ID
2116 * \retval SMESH_ComputeErrorPtr - error description
2118 //================================================================================
2120 SMESH_ComputeErrorPtr
2121 NETGENPlugin_Mesher::AddSegmentsToMesh(netgen::Mesh& ngMesh,
2122 netgen::OCCGeometry& geom,
2123 const TSideVector& wires,
2124 SMESH_MesherHelper& helper,
2125 vector< const SMDS_MeshNode* > & nodeVec,
2126 const bool overrideMinH)
2128 // ----------------------------
2129 // Check wires and count nodes
2130 // ----------------------------
2132 for ( size_t iW = 0; iW < wires.size(); ++iW )
2134 StdMeshers_FaceSidePtr wire = wires[ iW ];
2135 if ( wire->MissVertexNode() )
2137 // Commented for issue 0020960. It worked for the case, let's wait for case where it doesn't.
2138 // It seems that there is no reason for this limitation
2140 // (new SMESH_ComputeError(COMPERR_BAD_INPUT_MESH, "Missing nodes on vertices"));
2142 const vector<UVPtStruct>& uvPtVec = wire->GetUVPtStruct();
2143 if ((int) uvPtVec.size() != wire->NbPoints() )
2144 return SMESH_ComputeError::New(COMPERR_BAD_INPUT_MESH,
2145 SMESH_Comment("Unexpected nb of points on wire ") << iW
2146 << ": " << uvPtVec.size()<<" != "<<wire->NbPoints());
2147 nbNodes += wire->NbPoints();
2149 nodeVec.reserve( nodeVec.size() + nbNodes + 1 );
2150 if ( nodeVec.empty() )
2151 nodeVec.push_back( 0 );
2153 // -----------------
2155 // -----------------
2157 const bool wasNgMeshEmpty = ( ngMesh.GetNP() < 1 ); /* true => this method is called by
2158 NETGENPlugin_NETGEN_2D_ONLY */
2160 // map for nodes on vertices since they can be shared between wires
2161 // ( issue 0020676, face_int_box.brep) and nodes built by NETGEN
2162 map<const SMDS_MeshNode*, int > node2ngID;
2163 if ( !wasNgMeshEmpty ) // fill node2ngID with nodes built by NETGEN
2165 set< int > subIDs; // ids of sub-shapes of the FACE
2166 for ( size_t iW = 0; iW < wires.size(); ++iW )
2168 StdMeshers_FaceSidePtr wire = wires[ iW ];
2169 for ( int iE = 0, nbE = wire->NbEdges(); iE < nbE; ++iE )
2171 subIDs.insert( wire->EdgeID( iE ));
2172 subIDs.insert( helper.GetMeshDS()->ShapeToIndex( wire->FirstVertex( iE )));
2175 for ( size_t ngID = 1; ngID < nodeVec.size(); ++ngID )
2176 if ( subIDs.count( nodeVec[ngID]->getshapeId() ))
2177 node2ngID.insert( make_pair( nodeVec[ngID], ngID ));
2180 const int solidID = 0, faceID = geom.fmap.FindIndex( helper.GetSubShape() );
2181 if ( ngMesh.GetNFD() < 1 )
2182 ngMesh.AddFaceDescriptor( netgen::FaceDescriptor( faceID, solidID, solidID, 0 ));
2184 for ( size_t iW = 0; iW < wires.size(); ++iW )
2186 StdMeshers_FaceSidePtr wire = wires[ iW ];
2187 const vector<UVPtStruct>& uvPtVec = wire->GetUVPtStruct();
2188 const int nbSegments = wire->NbPoints() - 1;
2190 // assure the 1st node to be in node2ngID, which is needed to correctly
2191 // "close chain of segments" (see below) in case if the 1st node is not
2192 // onVertex because it is on a Viscous layer
2193 node2ngID.insert( make_pair( uvPtVec[ 0 ].node, ngMesh.GetNP() + 1 ));
2195 // compute length of every segment
2196 vector<double> segLen( nbSegments );
2197 for ( int i = 0; i < nbSegments; ++i )
2198 segLen[i] = SMESH_TNodeXYZ( uvPtVec[ i ].node ).Distance( uvPtVec[ i+1 ].node );
2200 int edgeID = 1, posID = -2;
2201 bool isInternalWire = false;
2202 double vertexNormPar = 0;
2203 const int prevNbNGSeg = ngMesh.GetNSeg();
2204 for ( int i = 0; i < nbSegments; ++i ) // loop on segments
2206 // Add the first point of a segment
2208 const SMDS_MeshNode * n = uvPtVec[ i ].node;
2209 const int posShapeID = n->getshapeId();
2210 bool onVertex = ( n->GetPosition()->GetTypeOfPosition() == SMDS_TOP_VERTEX );
2211 bool onEdge = ( n->GetPosition()->GetTypeOfPosition() == SMDS_TOP_EDGE );
2213 // skip nodes on degenerated edges
2214 if ( helper.IsDegenShape( posShapeID ) &&
2215 helper.IsDegenShape( uvPtVec[ i+1 ].node->getshapeId() ))
2218 int ngID1 = ngMesh.GetNP() + 1, ngID2 = ngID1+1;
2219 if ( onVertex || ( !wasNgMeshEmpty && onEdge ) || helper.IsRealSeam( posShapeID ))
2220 ngID1 = node2ngID.insert( make_pair( n, ngID1 )).first->second;
2221 if ( ngID1 > ngMesh.GetNP() )
2223 netgen::MeshPoint mp( netgen::Point<3> (n->X(), n->Y(), n->Z()) );
2224 ngMesh.AddPoint ( mp, 1, netgen::EDGEPOINT );
2225 nodeVec.push_back( n );
2227 else // n is in ngMesh already, and ngID2 in prev segment is wrong
2229 ngID2 = ngMesh.GetNP() + 1;
2230 if ( i > 0 ) // prev segment belongs to same wire
2232 netgen::Segment& prevSeg = ngMesh.LineSegment( ngMesh.GetNSeg() );
2239 netgen::Segment seg;
2241 seg[0] = ngID1; // ng node id
2242 seg[1] = ngID2; // ng node id
2243 seg.edgenr = ngMesh.GetNSeg() + 1; // ng segment id
2244 seg.si = faceID; // = geom.fmap.FindIndex (face);
2246 for ( int iEnd = 0; iEnd < 2; ++iEnd)
2248 const UVPtStruct& pnt = uvPtVec[ i + iEnd ];
2250 seg.epgeominfo[ iEnd ].dist = pnt.param; // param on curve
2251 seg.epgeominfo[ iEnd ].u = pnt.u;
2252 seg.epgeominfo[ iEnd ].v = pnt.v;
2254 // find out edge id and node parameter on edge
2255 onVertex = ( pnt.normParam + 1e-10 > vertexNormPar );
2256 if ( onVertex || posShapeID != posID )
2259 double normParam = pnt.normParam;
2261 normParam = 0.5 * ( uvPtVec[ i ].normParam + uvPtVec[ i+1 ].normParam );
2262 int edgeIndexInWire = wire->EdgeIndex( normParam );
2263 vertexNormPar = wire->LastParameter( edgeIndexInWire );
2264 const TopoDS_Edge& edge = wire->Edge( edgeIndexInWire );
2265 edgeID = geom.emap.FindIndex( edge );
2267 isInternalWire = ( edge.Orientation() == TopAbs_INTERNAL );
2268 // if ( onVertex ) // param on curve is different on each of two edges
2269 // seg.epgeominfo[ iEnd ].dist = helper.GetNodeU( edge, pnt.node );
2271 seg.epgeominfo[ iEnd ].edgenr = edgeID; // = geom.emap.FindIndex(edge);
2274 ngMesh.AddSegment (seg);
2276 // restrict size of elements near the segment
2277 SMESH_TNodeXYZ np1( n ), np2( uvPtVec[ i+1 ].node );
2278 // get an average size of adjacent segments to avoid sharp change of
2279 // element size (regression on issue 0020452, note 0010898)
2280 int iPrev = SMESH_MesherHelper::WrapIndex( i-1, nbSegments );
2281 int iNext = SMESH_MesherHelper::WrapIndex( i+1, nbSegments );
2282 double sumH = segLen[ iPrev ] + segLen[ i ] + segLen[ iNext ];
2283 int nbSeg = ( int( segLen[ iPrev ] > sumH / 100.) +
2284 int( segLen[ i ] > sumH / 100.) +
2285 int( segLen[ iNext ] > sumH / 100.));
2287 RestrictLocalSize( ngMesh, 0.5*(np1+np2), sumH / nbSeg, overrideMinH );
2289 if ( isInternalWire )
2291 swap (seg[0], seg[1]);
2292 swap( seg.epgeominfo[0], seg.epgeominfo[1] );
2293 seg.edgenr = ngMesh.GetNSeg() + 1; // segment id
2294 ngMesh.AddSegment (seg);
2296 } // loop on segments on a wire
2298 // close chain of segments
2299 if ( nbSegments > 0 )
2301 netgen::Segment& lastSeg = ngMesh.LineSegment( ngMesh.GetNSeg() - int( isInternalWire ));
2302 const SMDS_MeshNode * lastNode = uvPtVec.back().node;
2303 lastSeg[1] = node2ngID.insert( make_pair( lastNode, lastSeg[1] )).first->second;
2304 if ( lastSeg[1] > ngMesh.GetNP() )
2306 netgen::MeshPoint mp( netgen::Point<3> (lastNode->X(), lastNode->Y(), lastNode->Z()) );
2307 ngMesh.AddPoint ( mp, 1, netgen::EDGEPOINT );
2308 nodeVec.push_back( lastNode );
2310 if ( isInternalWire )
2312 netgen::Segment& realLastSeg = ngMesh.LineSegment( ngMesh.GetNSeg() );
2313 realLastSeg[0] = lastSeg[1];
2317 #ifdef DUMP_SEGMENTS
2318 cout << "BEGIN WIRE " << iW << endl;
2319 for ( int i = prevNbNGSeg+1; i <= ngMesh.GetNSeg(); ++i )
2321 netgen::Segment& seg = ngMesh.LineSegment( i );
2323 netgen::Segment& prevSeg = ngMesh.LineSegment( i-1 );
2324 if ( seg[0] == prevSeg[1] && seg[1] == prevSeg[0] )
2326 cout << "Segment: " << seg.edgenr << endl << "\tis REVERSE of the previous one" << endl;
2330 cout << "Segment: " << seg.edgenr << endl
2331 << "\tp1: " << seg[0] << " n" << nodeVec[ seg[0]]->GetID() << endl
2332 << "\tp2: " << seg[1] << " n" << nodeVec[ seg[1]]->GetID() << endl
2333 << "\tp0 param: " << seg.epgeominfo[ 0 ].dist << endl
2334 << "\tp0 uv: " << seg.epgeominfo[ 0 ].u <<", "<< seg.epgeominfo[ 0 ].v << endl
2335 << "\tp0 edge: " << seg.epgeominfo[ 0 ].edgenr << endl
2336 << "\tp1 param: " << seg.epgeominfo[ 1 ].dist << endl
2337 << "\tp1 uv: " << seg.epgeominfo[ 1 ].u <<", "<< seg.epgeominfo[ 1 ].v << endl
2338 << "\tp1 edge: " << seg.epgeominfo[ 1 ].edgenr << endl;
2340 cout << "--END WIRE " << iW << endl;
2342 SMESH_Comment __not_unused_variable( prevNbNGSeg );
2345 } // loop on WIREs of a FACE
2347 // add a segment instead of an internal vertex
2348 if ( wasNgMeshEmpty )
2350 NETGENPlugin_Internals intShapes( *helper.GetMesh(), helper.GetSubShape(), /*is3D=*/false );
2351 AddIntVerticesInFaces( geom, ngMesh, nodeVec, intShapes );
2353 ngMesh.CalcSurfacesOfNode();
2358 //================================================================================
2360 * \brief Fill SMESH mesh according to contents of netgen mesh
2361 * \param occgeo - container of OCCT geometry to mesh
2362 * \param ngMesh - netgen mesh
2363 * \param initState - bn of entities in netgen mesh before computing
2364 * \param sMesh - SMESH mesh to fill in
2365 * \param nodeVec - vector of nodes in which node index == netgen ID
2366 * \param comment - returns problem description
2367 * \param quadHelper - holder of medium nodes of sub-meshes
2368 * \retval int - error
2370 //================================================================================
2372 int NETGENPlugin_Mesher::FillSMesh(const netgen::OCCGeometry& occgeo,
2373 netgen::Mesh& ngMesh,
2374 const NETGENPlugin_ngMeshInfo& initState,
2376 std::vector<const SMDS_MeshNode*>& nodeVec,
2377 SMESH_Comment& comment,
2378 SMESH_MesherHelper* quadHelper)
2380 int nbNod = ngMesh.GetNP();
2381 int nbSeg = ngMesh.GetNSeg();
2382 int nbFac = ngMesh.GetNSE();
2383 int nbVol = ngMesh.GetNE();
2385 SMESHDS_Mesh* meshDS = sMesh.GetMeshDS();
2387 // quadHelper is used for either
2388 // 1) making quadratic elements when a lower dimension mesh is loaded
2389 // to SMESH before conversion to quadratic by NETGEN
2390 // 2) sewing of quadratic elements with quadratic elements of sub-meshes
2391 if ( quadHelper && !quadHelper->GetIsQuadratic() && quadHelper->GetTLinkNodeMap().empty() )
2394 int i, nbInitNod = initState._nbNodes;
2395 if ( initState._elementsRemoved )
2397 // PAL23427. Update nodeVec to track removal of netgen free points as a result
2398 // of removal of faces in FillNgMesh() in the case of a shrunk sub-mesh
2399 int ngID, nodeVecSize = nodeVec.size();
2400 const double eps = std::numeric_limits<double>::min();
2401 for ( ngID = i = 1; i < nodeVecSize; ++ngID, ++i )
2403 gp_Pnt ngPnt( NGPOINT_COORDS( ngMesh.Point( ngID )));
2404 gp_Pnt node ( SMESH_NodeXYZ (nodeVec_ACCESS(i) ));
2405 if ( ngPnt.SquareDistance( node ) < eps )
2407 nodeVec[ ngID ] = nodeVec[ i ];
2414 nodeVec.resize( ngID );
2415 nbInitNod = ngID - 1;
2417 // -------------------------------------
2418 // Create and insert nodes into nodeVec
2419 // -------------------------------------
2421 nodeVec.resize( nbNod + 1 );
2422 for ( i = nbInitNod+1; i <= nbNod; ++i )
2424 const netgen::MeshPoint& ngPoint = ngMesh.Point(i);
2425 SMDS_MeshNode* node = NULL;
2426 TopoDS_Vertex aVert;
2427 // First, netgen creates nodes on vertices in occgeo.vmap,
2428 // so node index corresponds to vertex index
2429 // but (issue 0020776) netgen does not create nodes with equal coordinates
2430 if ( i-nbInitNod <= occgeo.vmap.Extent() )
2432 gp_Pnt p ( NGPOINT_COORDS(ngPoint) );
2433 for (int iV = i-nbInitNod; aVert.IsNull() && iV <= occgeo.vmap.Extent(); ++iV)
2435 aVert = TopoDS::Vertex( occgeo.vmap( iV ));
2436 gp_Pnt pV = BRep_Tool::Pnt( aVert );
2437 if ( p.SquareDistance( pV ) > 1e-20 )
2440 node = const_cast<SMDS_MeshNode*>( SMESH_Algo::VertexNode( aVert, meshDS ));
2443 if (!node) // node not found on vertex
2445 node = meshDS->AddNode( NGPOINT_COORDS( ngPoint ));
2446 if (!aVert.IsNull())
2447 meshDS->SetNodeOnVertex(node, aVert);
2452 // -------------------------------------------
2453 // Create mesh segments along geometric edges
2454 // -------------------------------------------
2456 int nbInitSeg = initState._nbSegments;
2457 for (i = nbInitSeg+1; i <= nbSeg; ++i )
2459 const netgen::Segment& seg = ngMesh.LineSegment(i);
2461 int pinds[3] = { seg.pnums[0], seg.pnums[1], seg.pnums[2] };
2464 for (int j=0; j < 3; ++j)
2466 int pind = pinds[j];
2467 if (pind <= 0 || !nodeVec_ACCESS(pind))
2475 int aGeomEdgeInd = seg.epgeominfo[j].edgenr;
2476 if (aGeomEdgeInd > 0 && aGeomEdgeInd <= occgeo.emap.Extent())
2477 aEdge = TopoDS::Edge(occgeo.emap(aGeomEdgeInd));
2479 param = seg.epgeominfo[j].dist;
2482 else // middle point
2484 param = param2 * 0.5;
2486 if (!aEdge.IsNull() && nodeVec_ACCESS(pind)->getshapeId() < 1)
2488 meshDS->SetNodeOnEdge(nodeVec_ACCESS(pind), aEdge, param);
2493 SMDS_MeshEdge* edge = 0;
2494 if (nbp == 2) // second order ?
2496 if ( meshDS->FindEdge( nodeVec_ACCESS(pinds[0]), nodeVec_ACCESS(pinds[1])))
2498 if ( quadHelper ) // final mesh must be quadratic
2499 edge = quadHelper->AddEdge(nodeVec_ACCESS(pinds[0]), nodeVec_ACCESS(pinds[1]));
2501 edge = meshDS->AddEdge(nodeVec_ACCESS(pinds[0]), nodeVec_ACCESS(pinds[1]));
2505 if ( meshDS->FindEdge( nodeVec_ACCESS(pinds[0]), nodeVec_ACCESS(pinds[1]),
2506 nodeVec_ACCESS(pinds[2])))
2508 edge = meshDS->AddEdge(nodeVec_ACCESS(pinds[0]), nodeVec_ACCESS(pinds[1]),
2509 nodeVec_ACCESS(pinds[2]));
2513 if ( comment.empty() ) comment << "Cannot create a mesh edge";
2514 MESSAGE("Cannot create a mesh edge");
2515 nbSeg = nbFac = nbVol = 0;
2518 if ( !aEdge.IsNull() && edge->getshapeId() < 1 )
2519 meshDS->SetMeshElementOnShape(edge, aEdge);
2521 else if ( comment.empty() )
2523 comment << "Invalid netgen segment #" << i;
2527 // ----------------------------------------
2528 // Create mesh faces along geometric faces
2529 // ----------------------------------------
2531 int nbInitFac = initState._nbFaces;
2532 int quadFaceID = ngMesh.GetNFD() + 1;
2533 if ( nbInitFac < nbFac )
2534 // add a faces descriptor to exclude qudrangle elements generated by NETGEN
2535 // from computation of 3D mesh
2536 ngMesh.AddFaceDescriptor (netgen::FaceDescriptor(quadFaceID, /*solid1=*/0, /*solid2=*/0, 0));
2538 vector<const SMDS_MeshNode*> nodes;
2539 for (i = nbInitFac+1; i <= nbFac; ++i )
2541 const netgen::Element2d& elem = ngMesh.SurfaceElement(i);
2542 const int aGeomFaceInd = elem.GetIndex();
2544 if (aGeomFaceInd > 0 && aGeomFaceInd <= occgeo.fmap.Extent())
2545 aFace = TopoDS::Face(occgeo.fmap(aGeomFaceInd));
2547 for ( int j = 1; j <= elem.GetNP(); ++j )
2549 int pind = elem.PNum(j);
2550 if ( pind < 1 || pind >= (int) nodeVec.size() )
2552 if ( SMDS_MeshNode* node = nodeVec_ACCESS(pind))
2554 nodes.push_back( node );
2555 if (!aFace.IsNull() && node->getshapeId() < 1)
2557 const netgen::PointGeomInfo& pgi = elem.GeomInfoPi(j);
2558 meshDS->SetNodeOnFace(node, aFace, pgi.u, pgi.v);
2562 if ((int) nodes.size() != elem.GetNP() )
2564 if ( comment.empty() )
2565 comment << "Invalid netgen 2d element #" << i;
2566 continue; // bad node ids
2568 SMDS_MeshFace* face = NULL;
2569 switch (elem.GetType())
2572 if ( quadHelper ) // final mesh must be quadratic
2573 face = quadHelper->AddFace(nodes[0],nodes[1],nodes[2]);
2575 face = meshDS->AddFace(nodes[0],nodes[1],nodes[2]);
2578 if ( quadHelper ) // final mesh must be quadratic
2579 face = quadHelper->AddFace(nodes[0],nodes[1],nodes[2],nodes[3]);
2581 face = meshDS->AddFace(nodes[0],nodes[1],nodes[2],nodes[3]);
2582 // exclude qudrangle elements from computation of 3D mesh
2583 const_cast< netgen::Element2d& >( elem ).SetIndex( quadFaceID );
2586 nodes[5] = mediumNode( nodes[0],nodes[1],nodes[5], quadHelper );
2587 nodes[3] = mediumNode( nodes[1],nodes[2],nodes[3], quadHelper );
2588 nodes[4] = mediumNode( nodes[2],nodes[0],nodes[4], quadHelper );
2589 face = meshDS->AddFace(nodes[0],nodes[1],nodes[2],nodes[5],nodes[3],nodes[4]);
2592 nodes[4] = mediumNode( nodes[0],nodes[1],nodes[4], quadHelper );
2593 nodes[7] = mediumNode( nodes[1],nodes[2],nodes[7], quadHelper );
2594 nodes[5] = mediumNode( nodes[2],nodes[3],nodes[5], quadHelper );
2595 nodes[6] = mediumNode( nodes[3],nodes[0],nodes[6], quadHelper );
2596 face = meshDS->AddFace(nodes[0],nodes[1],nodes[2],nodes[3],
2597 nodes[4],nodes[7],nodes[5],nodes[6]);
2598 // exclude qudrangle elements from computation of 3D mesh
2599 const_cast< netgen::Element2d& >( elem ).SetIndex( quadFaceID );
2602 MESSAGE("NETGEN created a face of unexpected type, ignoring");
2607 if ( comment.empty() ) comment << "Cannot create a mesh face";
2608 MESSAGE("Cannot create a mesh face");
2609 nbSeg = nbFac = nbVol = 0;
2612 if ( !aFace.IsNull() )
2613 meshDS->SetMeshElementOnShape( face, aFace );
2616 // ------------------
2617 // Create tetrahedra
2618 // ------------------
2620 for ( i = 1; i <= nbVol; ++i )
2622 const netgen::Element& elem = ngMesh.VolumeElement(i);
2623 int aSolidInd = elem.GetIndex();
2624 TopoDS_Solid aSolid;
2625 if ( aSolidInd > 0 && aSolidInd <= occgeo.somap.Extent() )
2626 aSolid = TopoDS::Solid(occgeo.somap(aSolidInd));
2628 for ( int j = 1; j <= elem.GetNP(); ++j )
2630 int pind = elem.PNum(j);
2631 if ( pind < 1 || pind >= (int)nodeVec.size() )
2633 if ( SMDS_MeshNode* node = nodeVec_ACCESS(pind) )
2635 nodes.push_back(node);
2636 if ( !aSolid.IsNull() && node->getshapeId() < 1 )
2637 meshDS->SetNodeInVolume(node, aSolid);
2640 if ((int) nodes.size() != elem.GetNP() )
2642 if ( comment.empty() )
2643 comment << "Invalid netgen 3d element #" << i;
2646 SMDS_MeshVolume* vol = NULL;
2647 switch ( elem.GetType() )
2650 vol = meshDS->AddVolume(nodes[0],nodes[1],nodes[2],nodes[3]);
2653 nodes[4] = mediumNode( nodes[0],nodes[1],nodes[4], quadHelper );
2654 nodes[7] = mediumNode( nodes[1],nodes[2],nodes[7], quadHelper );
2655 nodes[5] = mediumNode( nodes[2],nodes[0],nodes[5], quadHelper );
2656 nodes[6] = mediumNode( nodes[0],nodes[3],nodes[6], quadHelper );
2657 nodes[8] = mediumNode( nodes[1],nodes[3],nodes[8], quadHelper );
2658 nodes[9] = mediumNode( nodes[2],nodes[3],nodes[9], quadHelper );
2659 vol = meshDS->AddVolume(nodes[0],nodes[1],nodes[2],nodes[3],
2660 nodes[4],nodes[7],nodes[5],nodes[6],nodes[8],nodes[9]);
2663 MESSAGE("NETGEN created a volume of unexpected type, ignoring");
2668 if ( comment.empty() ) comment << "Cannot create a mesh volume";
2669 MESSAGE("Cannot create a mesh volume");
2670 nbSeg = nbFac = nbVol = 0;
2673 if (!aSolid.IsNull())
2674 meshDS->SetMeshElementOnShape(vol, aSolid);
2676 return comment.empty() ? 0 : 1;
2681 //================================================================================
2683 * \brief Convert error into text
2685 //================================================================================
2687 std::string text(int err)
2692 SMESH_Comment("Error in netgen::OCCGenerateMesh() at ") << netgen::multithread.task;
2695 //================================================================================
2697 * \brief Convert exception into text
2699 //================================================================================
2701 std::string text(Standard_Failure& ex)
2703 SMESH_Comment str("Exception in netgen::OCCGenerateMesh()");
2704 str << " at " << netgen::multithread.task
2705 << ": " << ex.DynamicType()->Name();
2706 if ( ex.GetMessageString() && strlen( ex.GetMessageString() ))
2707 str << ": " << ex.GetMessageString();
2710 //================================================================================
2712 * \brief Convert exception into text
2714 //================================================================================
2716 std::string text(netgen::NgException& ex)
2718 SMESH_Comment str("NgException");
2719 if ( strlen( netgen::multithread.task ) > 0 )
2720 str << " at " << netgen::multithread.task;
2721 str << ": " << ex.What();
2725 //================================================================================
2727 * \brief Looks for triangles lying on a SOLID
2729 //================================================================================
2731 bool hasBadElemOnSolid( const list<const SMDS_MeshElement*>& elems,
2732 SMESH_subMesh* solidSM )
2734 TopTools_IndexedMapOfShape solidSubs;
2735 TopExp::MapShapes( solidSM->GetSubShape(), solidSubs );
2736 SMESHDS_Mesh* mesh = solidSM->GetFather()->GetMeshDS();
2738 list<const SMDS_MeshElement*>::const_iterator e = elems.begin();
2739 for ( ; e != elems.end(); ++e )
2741 const SMDS_MeshElement* elem = *e;
2742 // if ( elem->GetType() != SMDSAbs_Face ) -- 23047
2744 int nbNodesOnSolid = 0, nbNodes = elem->NbNodes();
2745 SMDS_NodeIteratorPtr nIt = elem->nodeIterator();
2746 while ( nIt->more() )
2748 const SMDS_MeshNode* n = nIt->next();
2749 const TopoDS_Shape& s = mesh->IndexToShape( n->getshapeId() );
2750 nbNodesOnSolid += ( !s.IsNull() && solidSubs.Contains( s ));
2751 if ( nbNodesOnSolid > 2 ||
2752 nbNodesOnSolid == nbNodes)
2759 const double edgeMeshingTime = 0.001;
2760 const double faceMeshingTime = 0.019;
2761 const double edgeFaceMeshingTime = edgeMeshingTime + faceMeshingTime;
2762 const double faceOptimizTime = 0.06;
2763 const double voluMeshingTime = 0.15;
2764 const double volOptimizeTime = 0.77;
2767 //=============================================================================
2769 * Here we are going to use the NETGEN mesher
2771 //=============================================================================
2773 bool NETGENPlugin_Mesher::Compute()
2775 NETGENPlugin_NetgenLibWrapper ngLib;
2777 netgen::MeshingParameters& mparams = netgen::mparam;
2779 SMESH_ComputeErrorPtr error = SMESH_ComputeError::New();
2780 SMESH_MesherHelper quadHelper( *_mesh );
2781 quadHelper.SetIsQuadratic( mparams.secondorder );
2783 // -------------------------
2784 // Prepare OCC geometry
2785 // -------------------------
2787 netgen::OCCGeometry occgeo;
2788 list< SMESH_subMesh* > meshedSM[3]; // for 0-2 dimensions
2789 NETGENPlugin_Internals internals( *_mesh, _shape, _isVolume );
2790 PrepareOCCgeometry( occgeo, _shape, *_mesh, meshedSM, &internals );
2793 _totalTime = edgeFaceMeshingTime;
2795 _totalTime += faceOptimizTime;
2797 _totalTime += voluMeshingTime + ( _optimize ? volOptimizeTime : 0 );
2798 double doneTime = 0;
2801 _curShapeIndex = -1;
2803 // -------------------------
2804 // Generate the mesh
2805 // -------------------------
2808 NETGENPlugin_ngMeshInfo initState; // it remembers size of ng mesh equal to size of Smesh
2810 SMESH_Comment comment;
2813 // vector of nodes in which node index == netgen ID
2814 vector< const SMDS_MeshNode* > nodeVec;
2822 // not to RestrictLocalH() according to curvature during MESHCONST_ANALYSE
2823 mparams.uselocalh = false;
2824 mparams.grading = 0.8; // not limitited size growth
2826 if ( _simpleHyp->GetNumberOfSegments() )
2828 mparams.maxh = occgeo.boundingbox.Diam();
2831 mparams.maxh = _simpleHyp->GetLocalLength();
2834 if ( mparams.maxh == 0.0 )
2835 mparams.maxh = occgeo.boundingbox.Diam();
2836 if ( _simpleHyp || ( mparams.minh == 0.0 && _fineness != NETGENPlugin_Hypothesis::UserDefined))
2837 mparams.minh = GetDefaultMinSize( _shape, mparams.maxh );
2839 // Local size on faces
2840 occgeo.face_maxh = mparams.maxh;
2842 // Let netgen create _ngMesh and calculate element size on not meshed shapes
2846 int startWith = netgen::MESHCONST_ANALYSE;
2847 int endWith = netgen::MESHCONST_ANALYSE;
2852 err = netgen::OCCGenerateMesh(occgeo, _ngMesh, mparams, startWith, endWith);
2854 err = netgen::OCCGenerateMesh(occgeo, _ngMesh, startWith, endWith, optstr);
2856 if(netgen::multithread.terminate)
2859 comment << text(err);
2861 catch (Standard_Failure& ex)
2863 comment << text(ex);
2865 catch (netgen::NgException & ex)
2867 comment << text(ex);
2868 if ( mparams.meshsizefilename )
2869 throw SMESH_ComputeError(COMPERR_BAD_PARMETERS, comment );
2871 err = 0; //- MESHCONST_ANALYSE isn't so important step
2874 ngLib.setMesh(( Ng_Mesh*) _ngMesh );
2876 _ngMesh->ClearFaceDescriptors(); // we make descriptors our-self
2878 if ( !mparams.uselocalh ) // mparams.grading is not taken into account yet
2879 _ngMesh->LocalHFunction().SetGrading( mparams.grading );
2883 // Pass 1D simple parameters to NETGEN
2884 // --------------------------------
2885 int nbSeg = _simpleHyp->GetNumberOfSegments();
2886 double segSize = _simpleHyp->GetLocalLength();
2887 for ( int iE = 1; iE <= occgeo.emap.Extent(); ++iE )
2889 const TopoDS_Edge& e = TopoDS::Edge( occgeo.emap(iE));
2891 segSize = SMESH_Algo::EdgeLength( e ) / ( nbSeg - 0.4 );
2892 setLocalSize( e, segSize, *_ngMesh );
2895 else // if ( ! _simpleHyp )
2897 // Local size on shapes
2898 SetLocalSize( occgeo, *_ngMesh );
2899 SetLocalSizeForChordalError( occgeo, *_ngMesh );
2902 // Precompute internal edges (issue 0020676) in order to
2903 // add mesh on them correctly (twice) to netgen mesh
2904 if ( !err && internals.hasInternalEdges() )
2906 // load internal shapes into OCCGeometry
2907 netgen::OCCGeometry intOccgeo;
2908 internals.getInternalEdges( intOccgeo.fmap, intOccgeo.emap, intOccgeo.vmap, meshedSM );
2909 intOccgeo.boundingbox = occgeo.boundingbox;
2910 intOccgeo.shape = occgeo.shape;
2911 intOccgeo.face_maxh.SetSize(intOccgeo.fmap.Extent());
2912 intOccgeo.face_maxh = netgen::mparam.maxh;
2913 netgen::Mesh *tmpNgMesh = NULL;
2917 // compute local H on internal shapes in the main mesh
2918 //OCCSetLocalMeshSize(intOccgeo, *_ngMesh); it deletes _ngMesh->localH
2920 // let netgen create a temporary mesh
2922 netgen::OCCGenerateMesh(intOccgeo, tmpNgMesh, mparams, startWith, endWith);
2924 netgen::OCCGenerateMesh(intOccgeo, tmpNgMesh, startWith, endWith, optstr);
2926 if(netgen::multithread.terminate)
2929 // copy LocalH from the main to temporary mesh
2930 initState.transferLocalH( _ngMesh, tmpNgMesh );
2932 // compute mesh on internal edges
2933 startWith = endWith = netgen::MESHCONST_MESHEDGES;
2935 err = netgen::OCCGenerateMesh(intOccgeo, tmpNgMesh, mparams, startWith, endWith);
2937 err = netgen::OCCGenerateMesh(intOccgeo, tmpNgMesh, startWith, endWith, optstr);
2939 comment << text(err);
2941 catch (Standard_Failure& ex)
2943 comment << text(ex);
2946 initState.restoreLocalH( tmpNgMesh );
2948 // fill SMESH by netgen mesh
2949 vector< const SMDS_MeshNode* > tmpNodeVec;
2950 FillSMesh( intOccgeo, *tmpNgMesh, initState, *_mesh, tmpNodeVec, comment );
2951 err = ( err || !comment.empty() );
2953 nglib::Ng_DeleteMesh((nglib::Ng_Mesh*)tmpNgMesh);
2956 // Fill _ngMesh with nodes and segments of computed submeshes
2959 err = ! ( FillNgMesh(occgeo, *_ngMesh, nodeVec, meshedSM[ MeshDim_0D ]) &&
2960 FillNgMesh(occgeo, *_ngMesh, nodeVec, meshedSM[ MeshDim_1D ], &quadHelper));
2962 initState = NETGENPlugin_ngMeshInfo(_ngMesh);
2967 startWith = endWith = netgen::MESHCONST_MESHEDGES;
2972 err = netgen::OCCGenerateMesh(occgeo, _ngMesh, mparams, startWith, endWith);
2974 err = netgen::OCCGenerateMesh(occgeo, _ngMesh, startWith, endWith, optstr);
2976 if(netgen::multithread.terminate)
2979 comment << text(err);
2981 catch (Standard_Failure& ex)
2983 comment << text(ex);
2988 _ticTime = ( doneTime += edgeMeshingTime ) / _totalTime / _progressTic;
2990 mparams.uselocalh = true; // restore as it is used at surface optimization
2992 // ---------------------
2993 // compute surface mesh
2994 // ---------------------
2997 // Pass 2D simple parameters to NETGEN
2999 if ( double area = _simpleHyp->GetMaxElementArea() ) {
3001 mparams.maxh = sqrt(2. * area/sqrt(3.0));
3002 mparams.grading = 0.4; // moderate size growth
3005 // length from edges
3006 if ( _ngMesh->GetNSeg() ) {
3007 double edgeLength = 0;
3008 TopTools_MapOfShape visitedEdges;
3009 for ( TopExp_Explorer exp( _shape, TopAbs_EDGE ); exp.More(); exp.Next() )
3010 if( visitedEdges.Add(exp.Current()) )
3011 edgeLength += SMESH_Algo::EdgeLength( TopoDS::Edge( exp.Current() ));
3012 // we have to multiply length by 2 since for each TopoDS_Edge there
3013 // are double set of NETGEN edges, in other words, we have to
3014 // divide _ngMesh->GetNSeg() by 2.
3015 mparams.maxh = 2*edgeLength / _ngMesh->GetNSeg();
3018 mparams.maxh = 1000;
3020 mparams.grading = 0.2; // slow size growth
3022 mparams.quad = _simpleHyp->GetAllowQuadrangles();
3023 mparams.maxh = min( mparams.maxh, occgeo.boundingbox.Diam()/2 );
3024 _ngMesh->SetGlobalH (mparams.maxh);
3025 netgen::Box<3> bb = occgeo.GetBoundingBox();
3026 bb.Increase (bb.Diam()/20);
3027 _ngMesh->SetLocalH (bb.PMin(), bb.PMax(), mparams.grading);
3030 // Care of vertices internal in faces (issue 0020676)
3031 if ( internals.hasInternalVertexInFace() )
3033 // store computed segments in SMESH in order not to create SMESH
3034 // edges for ng segments added by AddIntVerticesInFaces()
3035 FillSMesh( occgeo, *_ngMesh, initState, *_mesh, nodeVec, comment );
3036 // add segments to faces with internal vertices
3037 AddIntVerticesInFaces( occgeo, *_ngMesh, nodeVec, internals );
3038 initState = NETGENPlugin_ngMeshInfo(_ngMesh);
3041 // Build viscous layers
3042 if (( _isViscousLayers2D ) ||
3043 ( !occgeo.fmap.IsEmpty() &&
3044 StdMeshers_ViscousLayers2D::HasProxyMesh( TopoDS::Face( occgeo.fmap(1) ), *_mesh )))
3046 if ( !internals.hasInternalVertexInFace() ) {
3047 FillSMesh( occgeo, *_ngMesh, initState, *_mesh, nodeVec, comment );
3048 initState = NETGENPlugin_ngMeshInfo(_ngMesh);
3050 SMESH_ProxyMesh::Ptr viscousMesh;
3051 SMESH_MesherHelper helper( *_mesh );
3052 for ( int faceID = 1; faceID <= occgeo.fmap.Extent(); ++faceID )
3054 const TopoDS_Face& F = TopoDS::Face( occgeo.fmap( faceID ));
3055 viscousMesh = StdMeshers_ViscousLayers2D::Compute( *_mesh, F );
3058 if ( viscousMesh->NbProxySubMeshes() == 0 )
3060 // exclude from computation ng segments built on EDGEs of F
3061 for (int i = 1; i <= _ngMesh->GetNSeg(); i++)
3063 netgen::Segment & seg = _ngMesh->LineSegment(i);
3064 if (seg.si == faceID)
3067 // add new segments to _ngMesh instead of excluded ones
3068 helper.SetSubShape( F );
3070 StdMeshers_FaceSide::GetFaceWires( F, *_mesh, /*skipMediumNodes=*/true,
3071 error, &helper, viscousMesh );
3072 error = AddSegmentsToMesh( *_ngMesh, occgeo, wires, helper, nodeVec );
3074 if ( !error ) error = SMESH_ComputeError::New();
3076 initState = NETGENPlugin_ngMeshInfo(_ngMesh);
3079 // Let netgen compute 2D mesh
3080 startWith = netgen::MESHCONST_MESHSURFACE;
3081 endWith = _optimize ? netgen::MESHCONST_OPTSURFACE : netgen::MESHCONST_MESHSURFACE;
3086 err = netgen::OCCGenerateMesh(occgeo, _ngMesh, mparams, startWith, endWith);
3088 err = netgen::OCCGenerateMesh(occgeo, _ngMesh, startWith, endWith, optstr);
3090 if(netgen::multithread.terminate)
3093 comment << text (err);
3095 catch (Standard_Failure& ex)
3097 comment << text(ex);
3098 //err = 1; -- try to make volumes anyway
3100 catch (netgen::NgException exc)
3102 comment << text(exc);
3103 //err = 1; -- try to make volumes anyway
3108 doneTime += faceMeshingTime + ( _optimize ? faceOptimizTime : 0 );
3109 _ticTime = doneTime / _totalTime / _progressTic;
3111 // ---------------------
3112 // generate volume mesh
3113 // ---------------------
3114 // Fill _ngMesh with nodes and faces of computed 2D submeshes
3115 if ( !err && _isVolume &&
3116 ( !meshedSM[ MeshDim_2D ].empty() || mparams.quad || _viscousLayersHyp ))
3118 // load SMESH with computed segments and faces
3119 FillSMesh( occgeo, *_ngMesh, initState, *_mesh, nodeVec, comment, &quadHelper );
3121 // compute prismatic boundary volumes
3122 int nbQuad = _mesh->NbQuadrangles();
3123 SMESH_ProxyMesh::Ptr viscousMesh;
3124 if ( _viscousLayersHyp )
3126 viscousMesh = _viscousLayersHyp->Compute( *_mesh, _shape );
3130 // compute pyramids on quadrangles
3131 vector<SMESH_ProxyMesh::Ptr> pyramidMeshes( occgeo.somap.Extent() );
3133 for ( int iS = 1; iS <= occgeo.somap.Extent(); ++iS )
3135 StdMeshers_QuadToTriaAdaptor* adaptor = new StdMeshers_QuadToTriaAdaptor;
3136 pyramidMeshes[ iS-1 ].reset( adaptor );
3137 bool ok = adaptor->Compute( *_mesh, occgeo.somap(iS), viscousMesh.get() );
3141 // add proxy faces to NG mesh
3142 list< SMESH_subMesh* > viscousSM;
3143 for ( int iS = 1; iS <= occgeo.somap.Extent(); ++iS )
3145 list< SMESH_subMesh* > quadFaceSM;
3146 for (TopExp_Explorer face(occgeo.somap(iS), TopAbs_FACE); face.More(); face.Next())
3147 if ( pyramidMeshes[iS-1] && pyramidMeshes[iS-1]->GetProxySubMesh( face.Current() ))
3149 quadFaceSM.push_back( _mesh->GetSubMesh( face.Current() ));
3150 meshedSM[ MeshDim_2D ].remove( quadFaceSM.back() );
3152 else if ( viscousMesh && viscousMesh->GetProxySubMesh( face.Current() ))
3154 viscousSM.push_back( _mesh->GetSubMesh( face.Current() ));
3155 meshedSM[ MeshDim_2D ].remove( viscousSM.back() );
3157 if ( !quadFaceSM.empty() )
3158 FillNgMesh(occgeo, *_ngMesh, nodeVec, quadFaceSM, &quadHelper, pyramidMeshes[iS-1]);
3160 if ( !viscousSM.empty() )
3161 FillNgMesh(occgeo, *_ngMesh, nodeVec, viscousSM, &quadHelper, viscousMesh );
3163 // fill _ngMesh with faces of sub-meshes
3164 err = ! ( FillNgMesh(occgeo, *_ngMesh, nodeVec, meshedSM[ MeshDim_2D ], &quadHelper));
3165 initState = NETGENPlugin_ngMeshInfo(_ngMesh, /*checkRemovedElems=*/true);
3166 // toPython( _ngMesh );
3168 if (!err && _isVolume)
3170 // Pass 3D simple parameters to NETGEN
3171 const NETGENPlugin_SimpleHypothesis_3D* simple3d =
3172 dynamic_cast< const NETGENPlugin_SimpleHypothesis_3D* > ( _simpleHyp );
3174 if ( double vol = simple3d->GetMaxElementVolume() ) {
3176 mparams.maxh = pow( 72, 1/6. ) * pow( vol, 1/3. );
3177 mparams.maxh = min( mparams.maxh, occgeo.boundingbox.Diam()/2 );
3180 // length from faces
3181 mparams.maxh = _ngMesh->AverageH();
3183 _ngMesh->SetGlobalH (mparams.maxh);
3184 mparams.grading = 0.4;
3186 _ngMesh->CalcLocalH(mparams.grading);
3188 _ngMesh->CalcLocalH();
3191 // Care of vertices internal in solids and internal faces (issue 0020676)
3192 if ( internals.hasInternalVertexInSolid() || internals.hasInternalFaces() )
3194 // store computed faces in SMESH in order not to create SMESH
3195 // faces for ng faces added here
3196 FillSMesh( occgeo, *_ngMesh, initState, *_mesh, nodeVec, comment, &quadHelper );
3197 // add ng faces to solids with internal vertices
3198 AddIntVerticesInSolids( occgeo, *_ngMesh, nodeVec, internals );
3199 // duplicate mesh faces on internal faces
3200 FixIntFaces( occgeo, *_ngMesh, internals );
3201 initState = NETGENPlugin_ngMeshInfo(_ngMesh);
3203 // Let netgen compute 3D mesh
3204 startWith = endWith = netgen::MESHCONST_MESHVOLUME;
3209 err = netgen::OCCGenerateMesh(occgeo, _ngMesh, mparams, startWith, endWith);
3211 err = netgen::OCCGenerateMesh(occgeo, _ngMesh, startWith, endWith, optstr);
3213 if(netgen::multithread.terminate)
3216 if ( comment.empty() ) // do not overwrite a previous error
3217 comment << text(err);
3219 catch (Standard_Failure& ex)
3221 if ( comment.empty() ) // do not overwrite a previous error
3222 comment << text(ex);
3225 catch (netgen::NgException exc)
3227 if ( comment.empty() ) // do not overwrite a previous error
3228 comment << text(exc);
3231 _ticTime = ( doneTime += voluMeshingTime ) / _totalTime / _progressTic;
3233 // Let netgen optimize 3D mesh
3234 if ( !err && _optimize )
3236 startWith = endWith = netgen::MESHCONST_OPTVOLUME;
3241 err = netgen::OCCGenerateMesh(occgeo, _ngMesh, mparams, startWith, endWith);
3243 err = netgen::OCCGenerateMesh(occgeo, _ngMesh, startWith, endWith, optstr);
3245 if(netgen::multithread.terminate)
3248 if ( comment.empty() ) // do not overwrite a previous error
3249 comment << text(err);
3251 catch (Standard_Failure& ex)
3253 if ( comment.empty() ) // do not overwrite a previous error
3254 comment << text(ex);
3256 catch (netgen::NgException exc)
3258 if ( comment.empty() ) // do not overwrite a previous error
3259 comment << text(exc);
3263 if (!err && mparams.secondorder > 0)
3268 if ( !meshedSM[ MeshDim_1D ].empty() )
3270 // remove segments not attached to geometry (IPAL0052479)
3271 for (int i = 1; i <= _ngMesh->GetNSeg(); ++i)
3273 const netgen::Segment & seg = _ngMesh->LineSegment (i);
3274 if ( seg.epgeominfo[ 0 ].edgenr == 0 )
3275 _ngMesh->DeleteSegment( i );
3277 _ngMesh->Compress();
3279 // convert to quadratic
3280 netgen::OCCRefinementSurfaces ref (occgeo);
3281 ref.MakeSecondOrder (*_ngMesh);
3283 // care of elements already loaded to SMESH
3284 // if ( initState._nbSegments > 0 )
3285 // makeQuadratic( occgeo.emap, _mesh );
3286 // if ( initState._nbFaces > 0 )
3287 // makeQuadratic( occgeo.fmap, _mesh );
3289 catch (Standard_Failure& ex)
3291 if ( comment.empty() ) // do not overwrite a previous error
3292 comment << "Exception in netgen at passing to 2nd order ";
3294 catch (netgen::NgException exc)
3296 if ( comment.empty() ) // do not overwrite a previous error
3297 comment << exc.What();
3302 _ticTime = 0.98 / _progressTic;
3304 //int nbNod = _ngMesh->GetNP();
3305 //int nbSeg = _ngMesh->GetNSeg();
3306 int nbFac = _ngMesh->GetNSE();
3307 int nbVol = _ngMesh->GetNE();
3308 bool isOK = ( !err && (_isVolume ? (nbVol > 0) : (nbFac > 0)) );
3310 // Feed back the SMESHDS with the generated Nodes and Elements
3311 if ( true /*isOK*/ ) // get whatever built
3313 FillSMesh( occgeo, *_ngMesh, initState, *_mesh, nodeVec, comment, &quadHelper );
3315 if ( quadHelper.GetIsQuadratic() ) // remove free nodes
3317 for ( size_t i = 0; i < nodeVec.size(); ++i )
3318 if ( nodeVec[i] && nodeVec[i]->NbInverseElements() == 0 )
3320 _mesh->GetMeshDS()->RemoveFreeNode( nodeVec[i], 0, /*fromGroups=*/false );
3323 for ( size_t i = nodeVec.size()-1; i > 0; --i ) // remove trailing removed nodes
3325 nodeVec.resize( i );
3330 SMESH_ComputeErrorPtr readErr = ReadErrors(nodeVec);
3331 if ( readErr && readErr->HasBadElems() )
3334 if ( !comment.empty() && !readErr->myComment.empty() ) comment += "\n";
3335 comment += readErr->myComment;
3337 if ( error->IsOK() && ( !isOK || comment.size() > 0 ))
3338 error->myName = COMPERR_ALGO_FAILED;
3339 if ( !comment.empty() )
3340 error->myComment = comment;
3342 // SetIsAlwaysComputed( true ) to empty sub-meshes, which
3343 // appear if the geometry contains coincident sub-shape due
3344 // to bool merge_solids = 1; in netgen/libsrc/occ/occgenmesh.cpp
3345 const int nbMaps = 2;
3346 const TopTools_IndexedMapOfShape* geoMaps[nbMaps] =
3347 { & occgeo.vmap, & occgeo.emap/*, & occgeo.fmap*/ };
3348 for ( int iMap = 0; iMap < nbMaps; ++iMap )
3349 for (int i = 1; i <= geoMaps[iMap]->Extent(); i++)
3350 if ( SMESH_subMesh* sm = _mesh->GetSubMeshContaining( geoMaps[iMap]->FindKey(i)))
3351 if ( !sm->IsMeshComputed() )
3352 sm->SetIsAlwaysComputed( true );
3354 // set bad compute error to subshapes of all failed sub-shapes
3355 if ( !error->IsOK() )
3357 bool pb2D = false, pb3D = false;
3358 for (int i = 1; i <= occgeo.fmap.Extent(); i++) {
3359 int status = occgeo.facemeshstatus[i-1];
3360 if (status == netgen::FACE_MESHED_OK ) continue;
3361 if ( SMESH_subMesh* sm = _mesh->GetSubMeshContaining( occgeo.fmap( i ))) {
3362 SMESH_ComputeErrorPtr& smError = sm->GetComputeError();
3363 if ( !smError || smError->IsOK() ) {
3364 if ( status == netgen::FACE_FAILED )
3365 smError.reset( new SMESH_ComputeError( *error ));
3367 smError.reset( new SMESH_ComputeError( COMPERR_ALGO_FAILED, "Ignored" ));
3368 if ( SMESH_Algo::GetMeshError( sm ) == SMESH_Algo::MEr_OK )
3369 smError->myName = COMPERR_WARNING;
3371 pb2D = pb2D || smError->IsKO();
3374 if ( !pb2D ) // all faces are OK
3375 for (int i = 1; i <= occgeo.somap.Extent(); i++)
3376 if ( SMESH_subMesh* sm = _mesh->GetSubMeshContaining( occgeo.somap( i )))
3378 bool smComputed = nbVol && !sm->IsEmpty();
3379 if ( smComputed && internals.hasInternalVertexInSolid( sm->GetId() ))
3381 int nbIntV = internals.getSolidsWithVertices().find( sm->GetId() )->second.size();
3382 SMESHDS_SubMesh* smDS = sm->GetSubMeshDS();
3383 smComputed = ( smDS->NbElements() > 0 || smDS->NbNodes() > nbIntV );
3385 SMESH_ComputeErrorPtr& smError = sm->GetComputeError();
3386 if ( !smComputed && ( !smError || smError->IsOK() ))
3389 if ( nbVol && SMESH_Algo::GetMeshError( sm ) == SMESH_Algo::MEr_OK )
3391 smError->myName = COMPERR_WARNING;
3393 else if ( smError->HasBadElems() ) // bad surface mesh
3395 if ( !hasBadElemOnSolid
3396 ( static_cast<SMESH_BadInputElements*>( smError.get() )->myBadElements, sm ))
3400 pb3D = pb3D || ( smError && smError->IsKO() );
3402 if ( !pb2D && !pb3D )
3403 err = 0; // no fatal errors, only warnings
3406 ngLib._isComputeOk = !err;
3411 //=============================================================================
3415 //=============================================================================
3416 bool NETGENPlugin_Mesher::Evaluate(MapShapeNbElems& aResMap)
3418 netgen::MeshingParameters& mparams = netgen::mparam;
3421 // -------------------------
3422 // Prepare OCC geometry
3423 // -------------------------
3424 netgen::OCCGeometry occgeo;
3425 NETGENPlugin_Internals internals( *_mesh, _shape, _isVolume );
3426 PrepareOCCgeometry( occgeo, _shape, *_mesh, 0, &internals );
3428 bool tooManyElems = false;
3429 const int hugeNb = std::numeric_limits<int>::max() / 100;
3434 // pass 1D simple parameters to NETGEN
3437 // not to RestrictLocalH() according to curvature during MESHCONST_ANALYSE
3438 mparams.uselocalh = false;
3439 mparams.grading = 0.8; // not limitited size growth
3441 if ( _simpleHyp->GetNumberOfSegments() )
3443 mparams.maxh = occgeo.boundingbox.Diam();
3446 mparams.maxh = _simpleHyp->GetLocalLength();
3449 if ( mparams.maxh == 0.0 )
3450 mparams.maxh = occgeo.boundingbox.Diam();
3451 if ( _simpleHyp || ( mparams.minh == 0.0 && _fineness != NETGENPlugin_Hypothesis::UserDefined))
3452 mparams.minh = GetDefaultMinSize( _shape, mparams.maxh );
3454 // let netgen create _ngMesh and calculate element size on not meshed shapes
3455 NETGENPlugin_NetgenLibWrapper ngLib;
3456 netgen::Mesh *ngMesh = NULL;
3460 int startWith = netgen::MESHCONST_ANALYSE;
3461 int endWith = netgen::MESHCONST_MESHEDGES;
3463 int err = netgen::OCCGenerateMesh(occgeo, ngMesh, mparams, startWith, endWith);
3465 int err = netgen::OCCGenerateMesh(occgeo, ngMesh, startWith, endWith, optstr);
3468 if(netgen::multithread.terminate)
3471 ngLib.setMesh(( Ng_Mesh*) ngMesh );
3473 if ( SMESH_subMesh* sm = _mesh->GetSubMeshContaining( _shape ))
3474 sm->GetComputeError().reset( new SMESH_ComputeError( COMPERR_ALGO_FAILED ));
3477 // if ( _simpleHyp )
3479 // // Pass 1D simple parameters to NETGEN
3480 // // --------------------------------
3481 // int nbSeg = _simpleHyp->GetNumberOfSegments();
3482 // double segSize = _simpleHyp->GetLocalLength();
3483 // for ( int iE = 1; iE <= occgeo.emap.Extent(); ++iE )
3485 // const TopoDS_Edge& e = TopoDS::Edge( occgeo.emap(iE));
3487 // segSize = SMESH_Algo::EdgeLength( e ) / ( nbSeg - 0.4 );
3488 // setLocalSize( e, segSize, *ngMesh );
3491 // else // if ( ! _simpleHyp )
3493 // // Local size on shapes
3494 // SetLocalSize( occgeo, *ngMesh );
3496 // calculate total nb of segments and length of edges
3497 double fullLen = 0.0;
3499 int entity = mparams.secondorder > 0 ? SMDSEntity_Quad_Edge : SMDSEntity_Edge;
3500 TopTools_DataMapOfShapeInteger Edge2NbSeg;
3501 for (TopExp_Explorer exp(_shape, TopAbs_EDGE); exp.More(); exp.Next())
3503 TopoDS_Edge E = TopoDS::Edge( exp.Current() );
3504 if( !Edge2NbSeg.Bind(E,0) )
3507 double aLen = SMESH_Algo::EdgeLength(E);
3510 vector<int>& aVec = aResMap[_mesh->GetSubMesh(E)];
3512 aVec.resize( SMDSEntity_Last, 0);
3514 fullNbSeg += aVec[ entity ];
3517 // store nb of segments computed by Netgen
3518 NCollection_Map<Link> linkMap;
3519 for (int i = 1; i <= ngMesh->GetNSeg(); ++i )
3521 const netgen::Segment& seg = ngMesh->LineSegment(i);
3522 Link link(seg[0], seg[1]);
3523 if ( !linkMap.Add( link )) continue;
3524 int aGeomEdgeInd = seg.epgeominfo[0].edgenr;
3525 if (aGeomEdgeInd > 0 && aGeomEdgeInd <= occgeo.emap.Extent())
3527 vector<int>& aVec = aResMap[_mesh->GetSubMesh(occgeo.emap(aGeomEdgeInd))];
3531 // store nb of nodes on edges computed by Netgen
3532 TopTools_DataMapIteratorOfDataMapOfShapeInteger Edge2NbSegIt(Edge2NbSeg);
3533 for (; Edge2NbSegIt.More(); Edge2NbSegIt.Next())
3535 vector<int>& aVec = aResMap[_mesh->GetSubMesh(Edge2NbSegIt.Key())];
3536 if ( aVec[ entity ] > 1 && aVec[ SMDSEntity_Node ] == 0 )
3537 aVec[SMDSEntity_Node] = mparams.secondorder > 0 ? 2*aVec[ entity ]-1 : aVec[ entity ]-1;
3539 fullNbSeg += aVec[ entity ];
3540 Edge2NbSeg( Edge2NbSegIt.Key() ) = aVec[ entity ];
3542 if ( fullNbSeg == 0 )
3549 if ( double area = _simpleHyp->GetMaxElementArea() ) {
3551 mparams.maxh = sqrt(2. * area/sqrt(3.0));
3552 mparams.grading = 0.4; // moderate size growth
3555 // length from edges
3556 mparams.maxh = fullLen/fullNbSeg;
3557 mparams.grading = 0.2; // slow size growth
3560 mparams.maxh = min( mparams.maxh, occgeo.boundingbox.Diam()/2 );
3561 mparams.maxh = min( mparams.maxh, fullLen/fullNbSeg * (1. + mparams.grading));
3563 for (TopExp_Explorer exp(_shape, TopAbs_FACE); exp.More(); exp.Next())
3565 TopoDS_Face F = TopoDS::Face( exp.Current() );
3566 SMESH_subMesh *sm = _mesh->GetSubMesh(F);
3568 BRepGProp::SurfaceProperties(F,G);
3569 double anArea = G.Mass();
3570 tooManyElems = tooManyElems || ( anArea/hugeNb > mparams.maxh*mparams.maxh );
3572 if ( !tooManyElems )
3574 TopTools_MapOfShape edges;
3575 for (TopExp_Explorer exp1(F,TopAbs_EDGE); exp1.More(); exp1.Next())
3576 if ( edges.Add( exp1.Current() ))
3577 nb1d += Edge2NbSeg.Find(exp1.Current());
3579 int nbFaces = tooManyElems ? hugeNb : int( 4*anArea / (mparams.maxh*mparams.maxh*sqrt(3.)));
3580 int nbNodes = tooManyElems ? hugeNb : (( nbFaces*3 - (nb1d-1)*2 ) / 6 + 1 );
3582 vector<int> aVec(SMDSEntity_Last, 0);
3583 if( mparams.secondorder > 0 ) {
3584 int nb1d_in = (nbFaces*3 - nb1d) / 2;
3585 aVec[SMDSEntity_Node] = nbNodes + nb1d_in;
3586 aVec[SMDSEntity_Quad_Triangle] = nbFaces;
3589 aVec[SMDSEntity_Node] = Max ( nbNodes, 0 );
3590 aVec[SMDSEntity_Triangle] = nbFaces;
3592 aResMap[sm].swap(aVec);
3599 // pass 3D simple parameters to NETGEN
3600 const NETGENPlugin_SimpleHypothesis_3D* simple3d =
3601 dynamic_cast< const NETGENPlugin_SimpleHypothesis_3D* > ( _simpleHyp );
3603 if ( double vol = simple3d->GetMaxElementVolume() ) {
3605 mparams.maxh = pow( 72, 1/6. ) * pow( vol, 1/3. );
3606 mparams.maxh = min( mparams.maxh, occgeo.boundingbox.Diam()/2 );
3609 // using previous length from faces
3611 mparams.grading = 0.4;
3612 mparams.maxh = min( mparams.maxh, fullLen/fullNbSeg * (1. + mparams.grading));
3615 BRepGProp::VolumeProperties(_shape,G);
3616 double aVolume = G.Mass();
3617 double tetrVol = 0.1179*mparams.maxh*mparams.maxh*mparams.maxh;
3618 tooManyElems = tooManyElems || ( aVolume/hugeNb > tetrVol );
3619 int nbVols = tooManyElems ? hugeNb : int(aVolume/tetrVol);
3620 int nb1d_in = int(( nbVols*6 - fullNbSeg ) / 6 );
3621 vector<int> aVec(SMDSEntity_Last, 0 );
3622 if ( tooManyElems ) // avoid FPE
3624 aVec[SMDSEntity_Node] = hugeNb;
3625 aVec[ mparams.secondorder > 0 ? SMDSEntity_Quad_Tetra : SMDSEntity_Tetra] = hugeNb;
3629 if( mparams.secondorder > 0 ) {
3630 aVec[SMDSEntity_Node] = nb1d_in/3 + 1 + nb1d_in;
3631 aVec[SMDSEntity_Quad_Tetra] = nbVols;
3634 aVec[SMDSEntity_Node] = nb1d_in/3 + 1;
3635 aVec[SMDSEntity_Tetra] = nbVols;
3638 SMESH_subMesh *sm = _mesh->GetSubMesh(_shape);
3639 aResMap[sm].swap(aVec);
3645 double NETGENPlugin_Mesher::GetProgress(const SMESH_Algo* holder,
3646 const int * algoProgressTic,
3647 const double * algoProgress) const
3649 ((int&) _progressTic ) = *algoProgressTic + 1;
3651 if ( !_occgeom ) return 0;
3653 double progress = -1;
3656 if ( _ticTime < 0 && netgen::multithread.task[0] == 'O'/*Optimizing surface*/ )
3658 ((double&) _ticTime ) = edgeFaceMeshingTime / _totalTime / _progressTic;
3660 else if ( !_optimize /*&& _occgeom->fmap.Extent() > 1*/ )
3662 int doneShapeIndex = -1;
3663 while ( doneShapeIndex+1 < _occgeom->facemeshstatus.Size() &&
3664 _occgeom->facemeshstatus[ doneShapeIndex+1 ])
3666 if ( doneShapeIndex+1 != _curShapeIndex )
3668 ((int&) _curShapeIndex) = doneShapeIndex+1;
3669 double doneShapeRate = _curShapeIndex / double( _occgeom->fmap.Extent() );
3670 double doneTime = edgeMeshingTime + doneShapeRate * faceMeshingTime;
3671 ((double&) _ticTime) = doneTime / _totalTime / _progressTic;
3672 // cout << "shape " << _curShapeIndex << " _ticTime " << _ticTime
3673 // << " " << doneTime / _totalTime / _progressTic << endl;
3677 else if ( !_optimize && _occgeom->somap.Extent() > 1 )
3679 int curShapeIndex = _curShapeIndex;
3680 if ( _ngMesh->GetNE() > 0 )
3682 netgen::Element el = (*_ngMesh)[netgen::ElementIndex( _ngMesh->GetNE()-1 )];
3683 curShapeIndex = el.GetIndex();
3685 if ( curShapeIndex != _curShapeIndex )
3687 ((int&) _curShapeIndex) = curShapeIndex;
3688 double doneShapeRate = _curShapeIndex / double( _occgeom->somap.Extent() );
3689 double doneTime = edgeFaceMeshingTime + doneShapeRate * voluMeshingTime;
3690 ((double&) _ticTime) = doneTime / _totalTime / _progressTic;
3691 // cout << "shape " << _curShapeIndex << " _ticTime " << _ticTime
3692 // << " " << doneTime / _totalTime / _progressTic << endl;
3697 progress = Max( *algoProgressTic * _ticTime, *algoProgress );
3702 netgen::multithread.task[0] == 'D'/*elaunay meshing*/ &&
3703 progress > voluMeshingTime )
3705 progress = voluMeshingTime;
3706 ((double&) _ticTime) = voluMeshingTime / _totalTime / _progressTic;
3708 ((int&) *algoProgressTic )++;
3709 ((double&) *algoProgress) = progress;
3711 //cout << progress << " " << *algoProgressTic << " " << netgen::multithread.task << " "<< _ticTime << endl;
3713 return Min( progress, 0.99 );
3716 //================================================================================
3718 * \brief Read mesh entities preventing successful computation from "test.out" file
3720 //================================================================================
3722 SMESH_ComputeErrorPtr
3723 NETGENPlugin_Mesher::ReadErrors(const vector<const SMDS_MeshNode* >& nodeVec)
3725 if ( nodeVec.size() < 2 ) return SMESH_ComputeErrorPtr();
3726 SMESH_BadInputElements* err =
3727 new SMESH_BadInputElements( nodeVec.back()->GetMesh(), COMPERR_BAD_INPUT_MESH,
3728 "Some edges multiple times in surface mesh");
3729 SMESH_File file("test.out");
3731 vector<int> three1(3), three2(3);
3732 const char* badEdgeStr = " multiple times in surface mesh";
3733 const int badEdgeStrLen = strlen( badEdgeStr );
3734 const int nbNodes = nodeVec.size();
3736 while( !file.eof() )
3738 if ( strncmp( file, "Edge ", 5 ) == 0 &&
3739 file.getInts( two ) &&
3740 strncmp( file, badEdgeStr, badEdgeStrLen ) == 0 &&
3741 two[0] < nbNodes && two[1] < nbNodes )
3743 err->myBadElements.push_back( new SMDS_LinearEdge( nodeVec[ two[0]], nodeVec[ two[1]] ));
3744 file += badEdgeStrLen;
3746 else if ( strncmp( file, "Intersecting: ", 14 ) == 0 )
3749 // openelement 18 with open element 126
3753 const char* pos = file;
3754 bool ok = ( strncmp( file, "openelement ", 12 ) == 0 );
3755 ok = ok && file.getInts( two );
3756 ok = ok && file.getInts( three1 );
3757 ok = ok && file.getInts( three2 );
3758 for ( int i = 0; ok && i < 3; ++i )
3759 ok = ( three1[i] < nbNodes && nodeVec[ three1[i]]);
3760 for ( int i = 0; ok && i < 3; ++i )
3761 ok = ( three2[i] < nbNodes && nodeVec[ three2[i]]);
3764 err->myBadElements.push_back( new SMDS_FaceOfNodes( nodeVec[ three1[0]],
3765 nodeVec[ three1[1]],
3766 nodeVec[ three1[2]]));
3767 err->myBadElements.push_back( new SMDS_FaceOfNodes( nodeVec[ three2[0]],
3768 nodeVec[ three2[1]],
3769 nodeVec[ three2[2]]));
3770 err->myComment = "Intersecting triangles";
3784 size_t nbBadElems = err->myBadElements.size();
3785 if ( nbBadElems ) nbBadElems++; // avoid warning: variable set but not used
3788 return SMESH_ComputeErrorPtr( err );
3791 //================================================================================
3793 * \brief Write a python script creating an equivalent SALOME mesh.
3794 * This is useful to see what mesh is passed as input for the next step of mesh
3795 * generation (of mesh of higher dimension)
3797 //================================================================================
3799 void NETGENPlugin_Mesher::toPython( const netgen::Mesh* ngMesh )
3801 const char* pyFile = "/tmp/ngMesh.py";
3802 ofstream outfile( pyFile, ios::out );
3803 if ( !outfile ) return;
3805 outfile << "import salome, SMESH" << endl
3806 << "from salome.smesh import smeshBuilder" << endl
3807 << "smesh = smeshBuilder.New()" << endl
3808 << "mesh = smesh.Mesh()" << endl << endl;
3810 using namespace netgen;
3812 for (pi = PointIndex::BASE;
3813 pi < ngMesh->GetNP()+PointIndex::BASE; pi++)
3815 outfile << "mesh.AddNode( ";
3816 outfile << (*ngMesh)[pi](0) << ", ";
3817 outfile << (*ngMesh)[pi](1) << ", ";
3818 outfile << (*ngMesh)[pi](2) << ") ## "<< pi << endl;
3821 int nbDom = ngMesh->GetNDomains();
3822 for ( int i = 0; i < nbDom; ++i )
3823 outfile<< "grp" << i+1 << " = mesh.CreateEmptyGroup( SMESH.FACE, 'domain"<< i+1 << "')"<< endl;
3825 SurfaceElementIndex sei;
3826 for (sei = 0; sei < ngMesh->GetNSE(); sei++)
3828 outfile << "mesh.AddFace([ ";
3829 Element2d sel = (*ngMesh)[sei];
3830 for (int j = 0; j < sel.GetNP(); j++)
3831 outfile << sel[j] << ( j+1 < sel.GetNP() ? ", " : " ])");
3832 if ( sel.IsDeleted() ) outfile << " ## IsDeleted ";
3835 if ((*ngMesh)[sei].GetIndex())
3837 if ( int dom1 = ngMesh->GetFaceDescriptor((*ngMesh)[sei].GetIndex ()).DomainIn())
3838 outfile << "grp"<< dom1 <<".Add([ " << (int)sei+1 << " ])" << endl;
3839 if ( int dom2 = ngMesh->GetFaceDescriptor((*ngMesh)[sei].GetIndex ()).DomainOut())
3840 outfile << "grp"<< dom2 <<".Add([ " << (int)sei+1 << " ])" << endl;
3844 for (ElementIndex ei = 0; ei < ngMesh->GetNE(); ei++)
3846 Element el = (*ngMesh)[ei];
3847 outfile << "mesh.AddVolume([ ";
3848 for (int j = 0; j < el.GetNP(); j++)
3849 outfile << el[j] << ( j+1 < el.GetNP() ? ", " : " ])");
3853 for (int i = 1; i <= ngMesh->GetNSeg(); i++)
3855 const Segment & seg = ngMesh->LineSegment (i);
3856 outfile << "mesh.AddEdge([ "
3858 << seg[1] << " ])" << endl;
3860 cout << "Write " << pyFile << endl;
3863 //================================================================================
3865 * \brief Constructor of NETGENPlugin_ngMeshInfo
3867 //================================================================================
3869 NETGENPlugin_ngMeshInfo::NETGENPlugin_ngMeshInfo( netgen::Mesh* ngMesh,
3870 bool checkRemovedElems):
3871 _elementsRemoved( false ), _copyOfLocalH(0)
3875 _nbNodes = ngMesh->GetNP();
3876 _nbSegments = ngMesh->GetNSeg();
3877 _nbFaces = ngMesh->GetNSE();
3878 _nbVolumes = ngMesh->GetNE();
3880 if ( checkRemovedElems )
3881 for ( int i = 1; i <= ngMesh->GetNSE() && !_elementsRemoved; ++i )
3882 _elementsRemoved = ngMesh->SurfaceElement(i).IsDeleted();
3886 _nbNodes = _nbSegments = _nbFaces = _nbVolumes = 0;
3890 //================================================================================
3892 * \brief Copy LocalH member from one netgen mesh to another
3894 //================================================================================
3896 void NETGENPlugin_ngMeshInfo::transferLocalH( netgen::Mesh* fromMesh,
3897 netgen::Mesh* toMesh )
3899 if ( !fromMesh->LocalHFunctionGenerated() ) return;
3900 if ( !toMesh->LocalHFunctionGenerated() )
3902 toMesh->CalcLocalH(netgen::mparam.grading);
3904 toMesh->CalcLocalH();
3907 const size_t size = sizeof( netgen::LocalH );
3908 _copyOfLocalH = new char[ size ];
3909 memcpy( (void*)_copyOfLocalH, (void*)&toMesh->LocalHFunction(), size );
3910 memcpy( (void*)&toMesh->LocalHFunction(), (void*)&fromMesh->LocalHFunction(), size );
3913 //================================================================================
3915 * \brief Restore LocalH member of a netgen mesh
3917 //================================================================================
3919 void NETGENPlugin_ngMeshInfo::restoreLocalH( netgen::Mesh* toMesh )
3921 if ( _copyOfLocalH )
3923 const size_t size = sizeof( netgen::LocalH );
3924 memcpy( (void*)&toMesh->LocalHFunction(), (void*)_copyOfLocalH, size );
3925 delete [] _copyOfLocalH;
3930 //================================================================================
3932 * \brief Find "internal" sub-shapes
3934 //================================================================================
3936 NETGENPlugin_Internals::NETGENPlugin_Internals( SMESH_Mesh& mesh,
3937 const TopoDS_Shape& shape,
3939 : _mesh( mesh ), _is3D( is3D )
3941 SMESHDS_Mesh* meshDS = mesh.GetMeshDS();
3943 TopExp_Explorer f,e;
3944 for ( f.Init( shape, TopAbs_FACE ); f.More(); f.Next() )
3946 int faceID = meshDS->ShapeToIndex( f.Current() );
3948 // find not computed internal edges
3950 for ( e.Init( f.Current().Oriented(TopAbs_FORWARD), TopAbs_EDGE ); e.More(); e.Next() )
3951 if ( e.Current().Orientation() == TopAbs_INTERNAL )
3953 SMESH_subMesh* eSM = mesh.GetSubMesh( e.Current() );
3954 if ( eSM->IsEmpty() )
3956 _e2face.insert( make_pair( eSM->GetId(), faceID ));
3957 for ( TopoDS_Iterator v(e.Current()); v.More(); v.Next() )
3958 _e2face.insert( make_pair( meshDS->ShapeToIndex( v.Value() ), faceID ));
3962 // find internal vertices in a face
3963 set<int> intVV; // issue 0020850 where same vertex is twice in a face
3964 for ( TopoDS_Iterator fSub( f.Current() ); fSub.More(); fSub.Next())
3965 if ( fSub.Value().ShapeType() == TopAbs_VERTEX )
3967 int vID = meshDS->ShapeToIndex( fSub.Value() );
3968 if ( intVV.insert( vID ).second )
3969 _f2v[ faceID ].push_back( vID );
3974 // find internal faces and their subshapes where nodes are to be doubled
3975 // to make a crack with non-sewed borders
3977 if ( f.Current().Orientation() == TopAbs_INTERNAL )
3979 _intShapes.insert( meshDS->ShapeToIndex( f.Current() ));
3982 list< TopoDS_Shape > edges;
3983 for ( e.Init( f.Current(), TopAbs_EDGE ); e.More(); e.Next())
3984 if ( SMESH_MesherHelper::NbAncestors( e.Current(), mesh, TopAbs_FACE ) > 1 )
3986 _intShapes.insert( meshDS->ShapeToIndex( e.Current() ));
3987 edges.push_back( e.Current() );
3988 // find border faces
3989 PShapeIteratorPtr fIt =
3990 SMESH_MesherHelper::GetAncestors( edges.back(),mesh,TopAbs_FACE );
3991 while ( const TopoDS_Shape* pFace = fIt->next() )
3992 if ( !pFace->IsSame( f.Current() ))
3993 _borderFaces.insert( meshDS->ShapeToIndex( *pFace ));
3996 // we consider vertex internal if it is shared by more than one internal edge
3997 list< TopoDS_Shape >::iterator edge = edges.begin();
3998 for ( ; edge != edges.end(); ++edge )
3999 for ( TopoDS_Iterator v( *edge ); v.More(); v.Next() )
4001 set<int> internalEdges;
4002 PShapeIteratorPtr eIt =
4003 SMESH_MesherHelper::GetAncestors( v.Value(),mesh,TopAbs_EDGE );
4004 while ( const TopoDS_Shape* pEdge = eIt->next() )
4006 int edgeID = meshDS->ShapeToIndex( *pEdge );
4007 if ( isInternalShape( edgeID ))
4008 internalEdges.insert( edgeID );
4010 if ( internalEdges.size() > 1 )
4011 _intShapes.insert( meshDS->ShapeToIndex( v.Value() ));
4015 } // loop on geom faces
4017 // find vertices internal in solids
4020 for ( TopExp_Explorer so(shape, TopAbs_SOLID); so.More(); so.Next())
4022 int soID = meshDS->ShapeToIndex( so.Current() );
4023 for ( TopoDS_Iterator soSub( so.Current() ); soSub.More(); soSub.Next())
4024 if ( soSub.Value().ShapeType() == TopAbs_VERTEX )
4025 _s2v[ soID ].push_back( meshDS->ShapeToIndex( soSub.Value() ));
4030 //================================================================================
4032 * \brief Find mesh faces on non-internal geom faces sharing internal edge
4033 * some nodes of which are to be doubled to make the second border of the "crack"
4035 //================================================================================
4037 void NETGENPlugin_Internals::findBorderElements( TIDSortedElemSet & borderElems )
4039 if ( _intShapes.empty() ) return;
4041 SMESH_Mesh& mesh = const_cast<SMESH_Mesh&>(_mesh);
4042 SMESHDS_Mesh* meshDS = mesh.GetMeshDS();
4044 // loop on internal geom edges
4045 set<int>::const_iterator intShapeId = _intShapes.begin();
4046 for ( ; intShapeId != _intShapes.end(); ++intShapeId )
4048 const TopoDS_Shape& s = meshDS->IndexToShape( *intShapeId );
4049 if ( s.ShapeType() != TopAbs_EDGE ) continue;
4051 // get internal and non-internal geom faces sharing the internal edge <s>
4053 set<int>::iterator bordFace = _borderFaces.end();
4054 PShapeIteratorPtr faces = SMESH_MesherHelper::GetAncestors( s, _mesh, TopAbs_FACE );
4055 while ( const TopoDS_Shape* pFace = faces->next() )
4057 int faceID = meshDS->ShapeToIndex( *pFace );
4058 if ( isInternalShape( faceID ))
4061 bordFace = _borderFaces.insert( faceID ).first;
4063 if ( bordFace == _borderFaces.end() || !intFace ) continue;
4065 // get all links of mesh faces on internal geom face sharing nodes on edge <s>
4066 set< SMESH_OrientedLink > links; //!< links of faces on internal geom face
4067 list<const SMDS_MeshElement*> suspectFaces[2]; //!< mesh faces on border geom faces
4068 int nbSuspectFaces = 0;
4069 SMESHDS_SubMesh* intFaceSM = meshDS->MeshElements( intFace );
4070 if ( !intFaceSM || intFaceSM->NbElements() == 0 ) continue;
4071 SMESH_subMeshIteratorPtr smIt = mesh.GetSubMesh( s )->getDependsOnIterator(true,true);
4072 while ( smIt->more() )
4074 SMESHDS_SubMesh* sm = smIt->next()->GetSubMeshDS();
4075 if ( !sm ) continue;
4076 SMDS_NodeIteratorPtr nIt = sm->GetNodes();
4077 while ( nIt->more() )
4079 const SMDS_MeshNode* nOnEdge = nIt->next();
4080 SMDS_ElemIteratorPtr fIt = nOnEdge->GetInverseElementIterator(SMDSAbs_Face);
4081 while ( fIt->more() )
4083 const SMDS_MeshElement* f = fIt->next();
4084 const int nbNodes = f->NbCornerNodes();
4085 if ( intFaceSM->Contains( f ))
4087 for ( int i = 0; i < nbNodes; ++i )
4088 links.insert( SMESH_OrientedLink( f->GetNode(i), f->GetNode((i+1)%nbNodes)));
4093 for ( int i = 0; i < nbNodes; ++i )
4094 nbDblNodes += isInternalShape( f->GetNode(i)->getshapeId() );
4096 suspectFaces[ nbDblNodes < 2 ].push_back( f );
4102 // suspectFaces[0] having link with same orientation as mesh faces on
4103 // the internal geom face are <borderElems>. suspectFaces[1] have
4104 // only one node on edge <s>, we decide on them later (at the 2nd loop)
4105 // by links of <borderElems> found at the 1st and 2nd loops
4106 set< SMESH_OrientedLink > borderLinks;
4107 for ( int isPostponed = 0; isPostponed < 2; ++isPostponed )
4109 list<const SMDS_MeshElement*>::iterator fIt = suspectFaces[isPostponed].begin();
4110 for ( int nbF = 0; fIt != suspectFaces[isPostponed].end(); ++fIt, ++nbF )
4112 const SMDS_MeshElement* f = *fIt;
4113 bool isBorder = false, linkFound = false, borderLinkFound = false;
4114 list< SMESH_OrientedLink > faceLinks;
4115 int nbNodes = f->NbCornerNodes();
4116 for ( int i = 0; i < nbNodes; ++i )
4118 SMESH_OrientedLink link( f->GetNode(i), f->GetNode((i+1)%nbNodes));
4119 faceLinks.push_back( link );
4122 set< SMESH_OrientedLink >::iterator foundLink = links.find( link );
4123 if ( foundLink != links.end() )
4126 isBorder = ( foundLink->_reversed == link._reversed );
4127 if ( !isBorder && !isPostponed ) break;
4128 faceLinks.pop_back();
4130 else if ( isPostponed && !borderLinkFound )
4132 foundLink = borderLinks.find( link );
4133 if ( foundLink != borderLinks.end() )
4135 borderLinkFound = true;
4136 isBorder = ( foundLink->_reversed != link._reversed );
4143 borderElems.insert( f );
4144 borderLinks.insert( faceLinks.begin(), faceLinks.end() );
4146 else if ( !linkFound && !borderLinkFound )
4148 suspectFaces[1].push_back( f );
4149 if ( nbF > 2 * nbSuspectFaces )
4150 break; // dead loop protection
4157 //================================================================================
4159 * \brief put internal shapes in maps and fill in submeshes to precompute
4161 //================================================================================
4163 void NETGENPlugin_Internals::getInternalEdges( TopTools_IndexedMapOfShape& fmap,
4164 TopTools_IndexedMapOfShape& emap,
4165 TopTools_IndexedMapOfShape& vmap,
4166 list< SMESH_subMesh* > smToPrecompute[])
4168 if ( !hasInternalEdges() ) return;
4169 map<int,int>::const_iterator ev_face = _e2face.begin();
4170 for ( ; ev_face != _e2face.end(); ++ev_face )
4172 const TopoDS_Shape& ev = _mesh.GetMeshDS()->IndexToShape( ev_face->first );
4173 const TopoDS_Shape& face = _mesh.GetMeshDS()->IndexToShape( ev_face->second );
4175 ( ev.ShapeType() == TopAbs_EDGE ? emap : vmap ).Add( ev );
4177 //cout<<"INTERNAL EDGE or VERTEX "<<ev_face->first<<" on face "<<ev_face->second<<endl;
4179 smToPrecompute[ MeshDim_1D ].push_back( _mesh.GetSubMeshContaining( ev_face->first ));
4183 //================================================================================
4185 * \brief return shapes and submeshes to be meshed and already meshed boundary submeshes
4187 //================================================================================
4189 void NETGENPlugin_Internals::getInternalFaces( TopTools_IndexedMapOfShape& fmap,
4190 TopTools_IndexedMapOfShape& emap,
4191 list< SMESH_subMesh* >& intFaceSM,
4192 list< SMESH_subMesh* >& boundarySM)
4194 if ( !hasInternalFaces() ) return;
4196 // <fmap> and <emap> are for not yet meshed shapes
4197 // <intFaceSM> is for submeshes of faces
4198 // <boundarySM> is for meshed edges and vertices
4203 set<int> shapeIDs ( _intShapes );
4204 if ( !_borderFaces.empty() )
4205 shapeIDs.insert( _borderFaces.begin(), _borderFaces.end() );
4207 set<int>::const_iterator intS = shapeIDs.begin();
4208 for ( ; intS != shapeIDs.end(); ++intS )
4210 SMESH_subMesh* sm = _mesh.GetSubMeshContaining( *intS );
4212 if ( sm->GetSubShape().ShapeType() != TopAbs_FACE ) continue;
4214 intFaceSM.push_back( sm );
4216 // add submeshes of not computed internal faces
4217 if ( !sm->IsEmpty() ) continue;
4219 SMESH_subMeshIteratorPtr smIt = sm->getDependsOnIterator(true,true);
4220 while ( smIt->more() )
4223 const TopoDS_Shape& s = sm->GetSubShape();
4225 if ( sm->IsEmpty() )
4228 switch ( s.ShapeType() ) {
4229 case TopAbs_FACE: fmap.Add ( s ); break;
4230 case TopAbs_EDGE: emap.Add ( s ); break;
4236 if ( s.ShapeType() != TopAbs_FACE )
4237 boundarySM.push_back( sm );
4243 //================================================================================
4245 * \brief Return true if given shape is to be precomputed in order to be correctly
4246 * added to netgen mesh
4248 //================================================================================
4250 bool NETGENPlugin_Internals::isShapeToPrecompute(const TopoDS_Shape& s)
4252 int shapeID = _mesh.GetMeshDS()->ShapeToIndex( s );
4253 switch ( s.ShapeType() ) {
4254 case TopAbs_FACE : break; //return isInternalShape( shapeID ) || isBorderFace( shapeID );
4255 case TopAbs_EDGE : return isInternalEdge( shapeID );
4256 case TopAbs_VERTEX: break;
4262 //================================================================================
4264 * \brief Return SMESH
4266 //================================================================================
4268 SMESH_Mesh& NETGENPlugin_Internals::getMesh() const
4270 return const_cast<SMESH_Mesh&>( _mesh );
4273 //================================================================================
4275 * \brief Access to a counter of NETGENPlugin_NetgenLibWrapper instances
4277 //================================================================================
4279 int& NETGENPlugin_NetgenLibWrapper::instanceCounter()
4281 static int theCouner = 0;
4285 //================================================================================
4287 * \brief Initialize netgen library
4289 //================================================================================
4291 NETGENPlugin_NetgenLibWrapper::NETGENPlugin_NetgenLibWrapper()
4293 if ( instanceCounter() == 0 )
4296 ++instanceCounter();
4298 _isComputeOk = false;
4302 if ( !getenv( "KEEP_NETGEN_OUTPUT" ))
4304 // redirect all netgen output (mycout,myerr,cout) to _outputFileName
4305 _outputFileName = getOutputFileName();
4306 _ngcout = netgen::mycout;
4307 _ngcerr = netgen::myerr;
4308 netgen::mycout = new ofstream ( _outputFileName.c_str() );
4309 netgen::myerr = netgen::mycout;
4310 _coutBuffer = std::cout.rdbuf();
4312 cout << "NOTE: netgen output is redirected to file " << _outputFileName << endl;
4314 std::cout.rdbuf( netgen::mycout->rdbuf() );
4318 _ngMesh = Ng_NewMesh();
4321 //================================================================================
4323 * \brief Finish using netgen library
4325 //================================================================================
4327 NETGENPlugin_NetgenLibWrapper::~NETGENPlugin_NetgenLibWrapper()
4329 --instanceCounter();
4331 Ng_DeleteMesh( _ngMesh );
4335 std::cout.rdbuf( _coutBuffer );
4342 //================================================================================
4344 * \brief Set netgen mesh to delete at destruction
4346 //================================================================================
4348 void NETGENPlugin_NetgenLibWrapper::setMesh( Ng_Mesh* mesh )
4351 Ng_DeleteMesh( _ngMesh );
4355 //================================================================================
4357 * \brief Return a unique file name
4359 //================================================================================
4361 std::string NETGENPlugin_NetgenLibWrapper::getOutputFileName()
4363 std::string aTmpDir = SALOMEDS_Tool::GetTmpDir();
4365 TCollection_AsciiString aGenericName = (char*)aTmpDir.c_str();
4366 aGenericName += "NETGEN_";
4368 aGenericName += getpid();
4370 aGenericName += _getpid();
4372 aGenericName += "_";
4373 aGenericName += Abs((Standard_Integer)(long) aGenericName.ToCString());
4374 aGenericName += ".out";
4376 return aGenericName.ToCString();
4379 //================================================================================
4381 * \brief Remove "test.out" and "problemfaces" files in current directory
4383 //================================================================================
4385 void NETGENPlugin_NetgenLibWrapper::RemoveTmpFiles()
4387 bool rm = SMESH_File("test.out").remove() ;
4389 if ( rm && netgen::testout && instanceCounter() == 0 )
4391 delete netgen::testout;
4392 netgen::testout = 0;
4395 SMESH_File("problemfaces").remove();
4396 SMESH_File("occmesh.rep").remove();
4399 //================================================================================
4401 * \brief Remove file with netgen output
4403 //================================================================================
4405 void NETGENPlugin_NetgenLibWrapper::removeOutputFile()
4407 if ( !_outputFileName.empty() )
4411 delete netgen::mycout;
4412 netgen::mycout = _ngcout;
4413 netgen::myerr = _ngcerr;
4416 string tmpDir = SALOMEDS_Tool::GetDirFromPath ( _outputFileName );
4417 string aFileName = SALOMEDS_Tool::GetNameFromPath( _outputFileName ) + ".out";
4418 SALOMEDS_Tool::ListOfFiles aFiles;
4420 aFiles.push_back(aFileName.c_str());
4422 SALOMEDS_Tool::RemoveTemporaryFiles( tmpDir.c_str(), aFiles, true );