1 // Copyright (C) 2007-2016 CEA/DEN, EDF R&D, OPEN CASCADE
3 // Copyright (C) 2003-2007 OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
4 // CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS
6 // This library is free software; you can redistribute it and/or
7 // modify it under the terms of the GNU Lesser General Public
8 // License as published by the Free Software Foundation; either
9 // version 2.1 of the License, or (at your option) any later version.
11 // This library is distributed in the hope that it will be useful,
12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 // Lesser General Public License for more details.
16 // You should have received a copy of the GNU Lesser General Public
17 // License along with this library; if not, write to the Free Software
18 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 // See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
23 // NETGENPlugin : C++ implementation
24 // File : NETGENPlugin_Mesher.cxx
25 // Author : Michael Sazonov (OCN)
28 //=============================================================================
30 #include "NETGENPlugin_Mesher.hxx"
31 #include "NETGENPlugin_Hypothesis_2D.hxx"
32 #include "NETGENPlugin_SimpleHypothesis_3D.hxx"
34 #include <SMDS_FaceOfNodes.hxx>
35 #include <SMDS_LinearEdge.hxx>
36 #include <SMDS_MeshElement.hxx>
37 #include <SMDS_MeshNode.hxx>
38 #include <SMESHDS_Mesh.hxx>
39 #include <SMESH_Block.hxx>
40 #include <SMESH_Comment.hxx>
41 #include <SMESH_ComputeError.hxx>
42 #include <SMESH_ControlPnt.hxx>
43 #include <SMESH_File.hxx>
44 #include <SMESH_Gen_i.hxx>
45 #include <SMESH_Mesh.hxx>
46 #include <SMESH_MesherHelper.hxx>
47 #include <SMESH_subMesh.hxx>
48 #include <StdMeshers_QuadToTriaAdaptor.hxx>
49 #include <StdMeshers_ViscousLayers2D.hxx>
51 #include <SALOMEDS_Tool.hxx>
53 #include <utilities.h>
55 #include <BRepAdaptor_Surface.hxx>
56 #include <BRepBuilderAPI_Copy.hxx>
57 #include <BRepLProp_SLProps.hxx>
58 #include <BRepMesh_IncrementalMesh.hxx>
59 #include <BRep_Builder.hxx>
60 #include <BRep_Tool.hxx>
61 #include <Bnd_B3d.hxx>
62 #include <GeomLib_IsPlanarSurface.hxx>
63 #include <NCollection_Map.hxx>
64 #include <Poly_Triangulation.hxx>
65 #include <Standard_ErrorHandler.hxx>
66 #include <Standard_ProgramError.hxx>
67 #include <TColStd_MapOfInteger.hxx>
69 #include <TopExp_Explorer.hxx>
70 #include <TopLoc_Location.hxx>
71 #include <TopTools_DataMapIteratorOfDataMapOfShapeInteger.hxx>
72 #include <TopTools_DataMapIteratorOfDataMapOfShapeShape.hxx>
73 #include <TopTools_DataMapOfShapeInteger.hxx>
74 #include <TopTools_DataMapOfShapeShape.hxx>
75 #include <TopTools_MapOfShape.hxx>
77 #include <TopoDS_Compound.hxx>
79 // Netgen include files
83 #include <occgeom.hpp>
84 #include <meshing.hpp>
85 //#include <ngexception.hpp>
88 extern int OCCGenerateMesh (OCCGeometry&, Mesh*&, MeshingParameters&, int, int);
90 extern int OCCGenerateMesh (OCCGeometry&, Mesh*&, int, int, char*);
92 //extern void OCCSetLocalMeshSize(OCCGeometry & geom, Mesh & mesh);
93 #if defined(NETGEN_V5) && defined(WIN32)
96 extern MeshingParameters mparam;
97 #if defined(NETGEN_V5) && defined(WIN32)
100 extern volatile multithreadt multithread;
102 #if defined(NETGEN_V5) && defined(WIN32)
105 extern bool merge_solids;
107 // values used for occgeo.facemeshstatus
108 enum EFaceMeshStatus { FACE_NOT_TREATED = 0,
120 using namespace nglib;
124 #define nodeVec_ACCESS(index) ((SMDS_MeshNode*) nodeVec.at((index)))
126 #define nodeVec_ACCESS(index) ((SMDS_MeshNode*) nodeVec[index])
129 #define NGPOINT_COORDS(p) p(0),p(1),p(2)
132 // dump elements added to ng mesh
133 //#define DUMP_SEGMENTS
134 //#define DUMP_TRIANGLES
135 //#define DUMP_TRIANGLES_SCRIPT "/tmp/trias.py" //!< debug AddIntVerticesInSolids()
138 TopTools_IndexedMapOfShape ShapesWithLocalSize;
139 std::map<int,double> VertexId2LocalSize;
140 std::map<int,double> EdgeId2LocalSize;
141 std::map<int,double> FaceId2LocalSize;
142 std::map<int,double> SolidId2LocalSize;
144 std::vector<SMESHUtils::ControlPnt> ControlPoints;
145 std::set<int> ShapesWithControlPoints; // <-- allows calling SetLocalSize() several times w/o recomputing ControlPoints
147 //=============================================================================
151 //=============================================================================
153 NETGENPlugin_Mesher::NETGENPlugin_Mesher (SMESH_Mesh* mesh,
154 const TopoDS_Shape& aShape,
160 _fineness(NETGENPlugin_Hypothesis::GetDefaultFineness()),
161 _isViscousLayers2D(false),
162 _chordalError(-1), // means disabled
169 _viscousLayersHyp(NULL),
172 SetDefaultParameters();
173 ShapesWithLocalSize.Clear();
174 VertexId2LocalSize.clear();
175 EdgeId2LocalSize.clear();
176 FaceId2LocalSize.clear();
177 SolidId2LocalSize.clear();
178 ControlPoints.clear();
179 ShapesWithControlPoints.clear();
182 //================================================================================
186 //================================================================================
188 NETGENPlugin_Mesher::~NETGENPlugin_Mesher()
196 //================================================================================
198 * Set pointer to NETGENPlugin_Mesher* field of the holder, that will be
199 * nullified at destruction of this
201 //================================================================================
203 void NETGENPlugin_Mesher::SetSelfPointer( NETGENPlugin_Mesher ** ptr )
214 //================================================================================
216 * \brief Initialize global NETGEN parameters with default values
218 //================================================================================
220 void NETGENPlugin_Mesher::SetDefaultParameters()
222 netgen::MeshingParameters& mparams = netgen::mparam;
223 // maximal mesh edge size
224 mparams.maxh = 0;//NETGENPlugin_Hypothesis::GetDefaultMaxSize();
226 // minimal number of segments per edge
227 mparams.segmentsperedge = NETGENPlugin_Hypothesis::GetDefaultNbSegPerEdge();
228 // rate of growth of size between elements
229 mparams.grading = NETGENPlugin_Hypothesis::GetDefaultGrowthRate();
230 // safety factor for curvatures (elements per radius)
231 mparams.curvaturesafety = NETGENPlugin_Hypothesis::GetDefaultNbSegPerRadius();
232 // create elements of second order
233 mparams.secondorder = NETGENPlugin_Hypothesis::GetDefaultSecondOrder();
234 // quad-dominated surface meshing
238 mparams.quad = NETGENPlugin_Hypothesis_2D::GetDefaultQuadAllowed();
239 _fineness = NETGENPlugin_Hypothesis::GetDefaultFineness();
240 mparams.uselocalh = NETGENPlugin_Hypothesis::GetDefaultSurfaceCurvature();
241 netgen::merge_solids = NETGENPlugin_Hypothesis::GetDefaultFuseEdges();
244 //=============================================================================
248 //=============================================================================
250 void SetLocalSize(TopoDS_Shape GeomShape, double LocalSize)
252 if ( GeomShape.IsNull() ) return;
253 TopAbs_ShapeEnum GeomType = GeomShape.ShapeType();
254 if (GeomType == TopAbs_COMPOUND) {
255 for (TopoDS_Iterator it (GeomShape); it.More(); it.Next()) {
256 SetLocalSize(it.Value(), LocalSize);
261 if (! ShapesWithLocalSize.Contains(GeomShape))
262 key = ShapesWithLocalSize.Add(GeomShape);
264 key = ShapesWithLocalSize.FindIndex(GeomShape);
265 if (GeomType == TopAbs_VERTEX) {
266 VertexId2LocalSize[key] = LocalSize;
267 } else if (GeomType == TopAbs_EDGE) {
268 EdgeId2LocalSize[key] = LocalSize;
269 } else if (GeomType == TopAbs_FACE) {
270 FaceId2LocalSize[key] = LocalSize;
271 } else if (GeomType == TopAbs_SOLID) {
272 SolidId2LocalSize[key] = LocalSize;
276 //=============================================================================
278 * Pass parameters to NETGEN
280 //=============================================================================
281 void NETGENPlugin_Mesher::SetParameters(const NETGENPlugin_Hypothesis* hyp)
285 netgen::MeshingParameters& mparams = netgen::mparam;
286 // Initialize global NETGEN parameters:
287 // maximal mesh segment size
288 mparams.maxh = hyp->GetMaxSize();
289 // maximal mesh element linear size
290 mparams.minh = hyp->GetMinSize();
291 // minimal number of segments per edge
292 mparams.segmentsperedge = hyp->GetNbSegPerEdge();
293 // rate of growth of size between elements
294 mparams.grading = hyp->GetGrowthRate();
295 // safety factor for curvatures (elements per radius)
296 mparams.curvaturesafety = hyp->GetNbSegPerRadius();
297 // create elements of second order
298 mparams.secondorder = hyp->GetSecondOrder() ? 1 : 0;
299 // quad-dominated surface meshing
300 mparams.quad = hyp->GetQuadAllowed() ? 1 : 0;
301 _optimize = hyp->GetOptimize();
302 _fineness = hyp->GetFineness();
303 mparams.uselocalh = hyp->GetSurfaceCurvature();
304 netgen::merge_solids = hyp->GetFuseEdges();
305 _chordalError = hyp->GetChordalErrorEnabled() ? hyp->GetChordalError() : -1.;
308 mparams.meshsizefilename= hyp->GetMeshSizeFile().empty() ? 0 : hyp->GetMeshSizeFile().c_str();
310 const NETGENPlugin_Hypothesis::TLocalSize& localSizes = hyp->GetLocalSizesAndEntries();
311 if ( !localSizes.empty() )
313 SMESH_Gen_i* smeshGen_i = SMESH_Gen_i::GetSMESHGen();
314 NETGENPlugin_Hypothesis::TLocalSize::const_iterator it = localSizes.begin();
315 for ( ; it != localSizes.end() ; it++)
317 std::string entry = (*it).first;
318 double val = (*it).second;
320 GEOM::GEOM_Object_var aGeomObj;
321 SALOMEDS::SObject_var aSObj = SMESH_Gen_i::getStudyServant()->FindObjectID( entry.c_str() );
322 if ( !aSObj->_is_nil() ) {
323 CORBA::Object_var obj = aSObj->GetObject();
324 aGeomObj = GEOM::GEOM_Object::_narrow(obj);
327 TopoDS_Shape S = smeshGen_i->GeomObjectToShape( aGeomObj.in() );
328 ::SetLocalSize(S, val);
334 //=============================================================================
336 * Pass simple parameters to NETGEN
338 //=============================================================================
340 void NETGENPlugin_Mesher::SetParameters(const NETGENPlugin_SimpleHypothesis_2D* hyp)
344 SetDefaultParameters();
347 //================================================================================
349 * \brief Store a Viscous Layers hypothesis
351 //================================================================================
353 void NETGENPlugin_Mesher::SetParameters(const StdMeshers_ViscousLayers* hyp )
355 _viscousLayersHyp = hyp;
358 //=============================================================================
360 * Link - a pair of integer numbers
362 //=============================================================================
366 Link(int _n1, int _n2) : n1(_n1), n2(_n2) {}
367 Link() : n1(0), n2(0) {}
368 bool Contains( int n ) const { return n == n1 || n == n2; }
369 bool IsConnected( const Link& other ) const
371 return (( Contains( other.n1 ) || Contains( other.n2 )) && ( this != &other ));
375 int HashCode(const Link& aLink, int aLimit)
377 return HashCode(aLink.n1 + aLink.n2, aLimit);
380 Standard_Boolean IsEqual(const Link& aLink1, const Link& aLink2)
382 return (( aLink1.n1 == aLink2.n1 && aLink1.n2 == aLink2.n2 ) ||
383 ( aLink1.n1 == aLink2.n2 && aLink1.n2 == aLink2.n1 ));
388 //================================================================================
390 * \brief return id of netgen point corresponding to SMDS node
392 //================================================================================
393 typedef map< const SMDS_MeshNode*, int > TNode2IdMap;
395 int ngNodeId( const SMDS_MeshNode* node,
396 netgen::Mesh& ngMesh,
397 TNode2IdMap& nodeNgIdMap)
399 int newNgId = ngMesh.GetNP() + 1;
401 TNode2IdMap::iterator node_id = nodeNgIdMap.insert( make_pair( node, newNgId )).first;
403 if ( node_id->second == newNgId)
405 #if defined(DUMP_SEGMENTS) || defined(DUMP_TRIANGLES)
406 cout << "Ng " << newNgId << " - " << node;
408 netgen::MeshPoint p( netgen::Point<3> (node->X(), node->Y(), node->Z()) );
409 ngMesh.AddPoint( p );
411 return node_id->second;
414 //================================================================================
416 * \brief Return computed EDGEs connected to the given one
418 //================================================================================
420 list< TopoDS_Edge > getConnectedEdges( const TopoDS_Edge& edge,
421 const TopoDS_Face& face,
422 const set< SMESH_subMesh* > & computedSM,
423 const SMESH_MesherHelper& helper,
424 map< SMESH_subMesh*, set< int > >& addedEdgeSM2Faces)
427 list< TopoDS_Edge > edges;
428 list< int > nbEdgesInWire;
429 /*int nbWires =*/ SMESH_Block::GetOrderedEdges( face, edges, nbEdgesInWire);
431 // find <edge> within <edges>
432 list< TopoDS_Edge >::iterator eItFwd = edges.begin();
433 for ( ; eItFwd != edges.end(); ++eItFwd )
434 if ( edge.IsSame( *eItFwd ))
436 if ( eItFwd == edges.end()) return list< TopoDS_Edge>();
438 if ( eItFwd->Orientation() >= TopAbs_INTERNAL )
440 // connected INTERNAL edges returned from GetOrderedEdges() are wrongly oriented
441 // so treat each INTERNAL edge separately
442 TopoDS_Edge e = *eItFwd;
444 edges.push_back( e );
448 // get all computed EDGEs connected to <edge>
450 list< TopoDS_Edge >::iterator eItBack = eItFwd, ePrev;
451 TopoDS_Vertex vCommon;
452 TopTools_MapOfShape eAdded; // map used not to add a seam edge twice to <edges>
455 // put edges before <edge> to <edges> back
456 while ( edges.begin() != eItFwd )
457 edges.splice( edges.end(), edges, edges.begin() );
461 while ( ++eItFwd != edges.end() )
463 SMESH_subMesh* sm = helper.GetMesh()->GetSubMesh( *eItFwd );
465 bool connected = TopExp::CommonVertex( *ePrev, *eItFwd, vCommon );
466 bool computed = sm->IsMeshComputed();
467 bool added = addedEdgeSM2Faces[ sm ].count( helper.GetSubShapeID() );
468 bool doubled = !eAdded.Add( *eItFwd );
469 bool orientOK = (( ePrev ->Orientation() < TopAbs_INTERNAL ) ==
470 ( eItFwd->Orientation() < TopAbs_INTERNAL ) );
471 if ( !connected || !computed || !orientOK || added || doubled )
473 // stop advancement; move edges from tail to head
474 while ( edges.back() != *ePrev )
475 edges.splice( edges.begin(), edges, --edges.end() );
481 while ( eItBack != edges.begin() )
485 SMESH_subMesh* sm = helper.GetMesh()->GetSubMesh( *eItBack );
487 bool connected = TopExp::CommonVertex( *ePrev, *eItBack, vCommon );
488 bool computed = sm->IsMeshComputed();
489 bool added = addedEdgeSM2Faces[ sm ].count( helper.GetSubShapeID() );
490 bool doubled = !eAdded.Add( *eItBack );
491 bool orientOK = (( ePrev ->Orientation() < TopAbs_INTERNAL ) ==
492 ( eItBack->Orientation() < TopAbs_INTERNAL ) );
493 if ( !connected || !computed || !orientOK || added || doubled)
496 edges.erase( edges.begin(), ePrev );
500 if ( edges.front() != edges.back() )
502 // assure that the 1st vertex is meshed
503 TopoDS_Edge eLast = edges.back();
504 while ( !SMESH_Algo::VertexNode( SMESH_MesherHelper::IthVertex( 0, edges.front()), helper.GetMeshDS())
506 edges.front() != eLast )
507 edges.splice( edges.end(), edges, edges.begin() );
512 //================================================================================
514 * \brief Make triangulation of a shape precise enough
516 //================================================================================
518 void updateTriangulation( const TopoDS_Shape& shape )
520 // static set< Poly_Triangulation* > updated;
522 // TopLoc_Location loc;
523 // TopExp_Explorer fExp( shape, TopAbs_FACE );
524 // for ( ; fExp.More(); fExp.Next() )
526 // Handle(Poly_Triangulation) triangulation =
527 // BRep_Tool::Triangulation ( TopoDS::Face( fExp.Current() ), loc);
528 // if ( triangulation.IsNull() ||
529 // updated.insert( triangulation.operator->() ).second )
531 // BRepTools::Clean (shape);
534 BRepMesh_IncrementalMesh e(shape, 0.01, true);
536 catch (Standard_Failure)
539 // updated.erase( triangulation.operator->() );
540 // triangulation = BRep_Tool::Triangulation ( TopoDS::Face( fExp.Current() ), loc);
541 // updated.insert( triangulation.operator->() );
545 //================================================================================
547 * \brief Returns a medium node either existing in SMESH of created by NETGEN
548 * \param [in] corner1 - corner node 1
549 * \param [in] corner2 - corner node 2
550 * \param [in] defaultMedium - the node created by NETGEN
551 * \param [in] helper - holder of medium nodes existing in SMESH
552 * \return const SMDS_MeshNode* - the result node
554 //================================================================================
556 const SMDS_MeshNode* mediumNode( const SMDS_MeshNode* corner1,
557 const SMDS_MeshNode* corner2,
558 const SMDS_MeshNode* defaultMedium,
559 const SMESH_MesherHelper* helper)
563 TLinkNodeMap::const_iterator l2n =
564 helper->GetTLinkNodeMap().find( SMESH_TLink( corner1, corner2 ));
565 if ( l2n != helper->GetTLinkNodeMap().end() )
566 defaultMedium = l2n->second;
568 return defaultMedium;
571 //================================================================================
573 * \brief Assure that mesh on given shapes is quadratic
575 //================================================================================
577 // void makeQuadratic( const TopTools_IndexedMapOfShape& shapes,
578 // SMESH_Mesh* mesh )
580 // for ( int i = 1; i <= shapes.Extent(); ++i )
582 // SMESHDS_SubMesh* smDS = mesh->GetMeshDS()->MeshElements( shapes(i) );
583 // if ( !smDS ) continue;
584 // SMDS_ElemIteratorPtr elemIt = smDS->GetElements();
585 // if ( !elemIt->more() ) continue;
586 // const SMDS_MeshElement* e = elemIt->next();
587 // if ( !e || e->IsQuadratic() )
590 // TIDSortedElemSet elems;
591 // elems.insert( e );
592 // while ( elemIt->more() )
593 // elems.insert( elems.end(), elemIt->next() );
595 // SMESH_MeshEditor( mesh ).ConvertToQuadratic( /*3d=*/false, elems, /*biQuad=*/false );
599 //================================================================================
601 * \brief Restrict size of elements on the given edge
603 //================================================================================
605 void setLocalSize(const TopoDS_Edge& edge,
608 const bool overrideMinH = true)
610 if ( size <= std::numeric_limits<double>::min() )
612 Standard_Real u1, u2;
613 Handle(Geom_Curve) curve = BRep_Tool::Curve(edge, u1, u2);
614 if ( curve.IsNull() )
616 TopoDS_Iterator vIt( edge );
617 if ( !vIt.More() ) return;
618 gp_Pnt p = BRep_Tool::Pnt( TopoDS::Vertex( vIt.Value() ));
619 NETGENPlugin_Mesher::RestrictLocalSize( mesh, p.XYZ(), size, overrideMinH );
623 const int nb = (int)( 1.5 * SMESH_Algo::EdgeLength( edge ) / size );
624 Standard_Real delta = (u2-u1)/nb;
625 for(int i=0; i<nb; i++)
627 Standard_Real u = u1 + delta*i;
628 gp_Pnt p = curve->Value(u);
629 NETGENPlugin_Mesher::RestrictLocalSize( mesh, p.XYZ(), size, overrideMinH );
630 netgen::Point3d pi(p.X(), p.Y(), p.Z());
631 double resultSize = mesh.GetH(pi);
632 if ( resultSize - size > 0.1*size )
633 // netgen does restriction iff oldH/newH > 1.2 (localh.cpp:136)
634 NETGENPlugin_Mesher::RestrictLocalSize( mesh, p.XYZ(), resultSize/1.201, overrideMinH );
639 //================================================================================
641 * \brief Return triangle size for a given chordalError and radius of curvature
643 //================================================================================
645 double elemSizeForChordalError( double chordalError, double radius )
647 if ( 2 * radius < chordalError )
649 return Sqrt( 3 ) * Sqrt( chordalError * ( 2 * radius - chordalError ));
654 //================================================================================
656 * \brief Set local size on shapes defined by SetParameters()
658 //================================================================================
660 void NETGENPlugin_Mesher::SetLocalSize( netgen::OCCGeometry& occgeo,
661 netgen::Mesh& ngMesh)
664 std::map<int,double>::const_iterator it;
665 for( it=EdgeId2LocalSize.begin(); it!=EdgeId2LocalSize.end(); it++)
667 int key = (*it).first;
668 double hi = (*it).second;
669 const TopoDS_Shape& shape = ShapesWithLocalSize.FindKey(key);
670 setLocalSize( TopoDS::Edge(shape), hi, ngMesh );
673 for(it=VertexId2LocalSize.begin(); it!=VertexId2LocalSize.end(); it++)
675 int key = (*it).first;
676 double hi = (*it).second;
677 const TopoDS_Shape& shape = ShapesWithLocalSize.FindKey(key);
678 gp_Pnt p = BRep_Tool::Pnt( TopoDS::Vertex(shape) );
679 NETGENPlugin_Mesher::RestrictLocalSize( ngMesh, p.XYZ(), hi );
682 for(it=FaceId2LocalSize.begin(); it!=FaceId2LocalSize.end(); it++)
684 int key = (*it).first;
685 double val = (*it).second;
686 const TopoDS_Shape& shape = ShapesWithLocalSize.FindKey(key);
687 int faceNgID = occgeo.fmap.FindIndex(shape);
690 occgeo.SetFaceMaxH(faceNgID, val);
691 for ( TopExp_Explorer edgeExp( shape, TopAbs_EDGE ); edgeExp.More(); edgeExp.Next() )
692 setLocalSize( TopoDS::Edge( edgeExp.Current() ), val, ngMesh );
694 else if ( !ShapesWithControlPoints.count( key ))
696 SMESHUtils::createPointsSampleFromFace( TopoDS::Face( shape ), val, ControlPoints );
697 ShapesWithControlPoints.insert( key );
701 for(it=SolidId2LocalSize.begin(); it!=SolidId2LocalSize.end(); it++)
703 int key = (*it).first;
704 double val = (*it).second;
705 if ( !ShapesWithControlPoints.count( key ))
707 const TopoDS_Shape& shape = ShapesWithLocalSize.FindKey(key);
708 SMESHUtils::createPointsSampleFromSolid( TopoDS::Solid( shape ), val, ControlPoints );
709 ShapesWithControlPoints.insert( key );
713 if ( !ControlPoints.empty() )
715 for ( size_t i = 0; i < ControlPoints.size(); ++i )
716 NETGENPlugin_Mesher::RestrictLocalSize( ngMesh, ControlPoints[i].XYZ(), ControlPoints[i].Size() );
721 //================================================================================
723 * \brief Restrict local size to achieve a required _chordalError
725 //================================================================================
727 void NETGENPlugin_Mesher::SetLocalSizeForChordalError( netgen::OCCGeometry& occgeo,
728 netgen::Mesh& ngMesh)
730 if ( _chordalError <= 0. )
734 BRepLProp_SLProps surfProp( 2, 1e-6 );
735 const double sizeCoef = 0.95;
737 // find non-planar FACEs with non-constant curvature
738 std::vector<int> fInd;
739 for ( int i = 1; i <= occgeo.fmap.Extent(); ++i )
741 const TopoDS_Face& face = TopoDS::Face( occgeo.fmap( i ));
742 BRepAdaptor_Surface surfAd( face, false );
743 switch ( surfAd.GetType() )
747 case GeomAbs_Cylinder:
749 case GeomAbs_Torus: // constant curvature
751 surfProp.SetSurface( surfAd );
752 surfProp.SetParameters( 0, 0 );
753 double maxCurv = Max( Abs( surfProp.MaxCurvature()), Abs( surfProp.MinCurvature() ));
754 double size = elemSizeForChordalError( _chordalError, 1 / maxCurv );
755 occgeo.SetFaceMaxH( i, size * sizeCoef );
756 // limit size one edges
757 TopTools_MapOfShape edgeMap;
758 for ( TopExp_Explorer eExp( face, TopAbs_EDGE ); eExp.More(); eExp.Next() )
759 if ( edgeMap.Add( eExp.Current() ))
760 setLocalSize( TopoDS::Edge( eExp.Current() ), size, ngMesh, /*overrideMinH=*/false );
764 Handle(Geom_Surface) surf = BRep_Tool::Surface( face, loc );
765 if ( GeomLib_IsPlanarSurface( surf ).IsPlanar() )
774 TopoDS_Compound allFacesComp;
775 b.MakeCompound( allFacesComp );
776 for ( size_t i = 0; i < fInd.size(); ++i )
777 b.Add( allFacesComp, occgeo.fmap( fInd[i] ));
779 // copy the shape to avoid spoiling its triangulation
780 TopoDS_Shape allFacesCompCopy = BRepBuilderAPI_Copy( allFacesComp );
782 // create triangulation with desired chordal error
783 BRepMesh_IncrementalMesh( allFacesCompCopy,
785 /*isRelative = */Standard_False,
786 /*theAngDeflection = */ 0.5,
787 /*isInParallel = */Standard_True);
790 for ( TopExp_Explorer fExp( allFacesCompCopy, TopAbs_FACE ); fExp.More(); fExp.Next() )
792 const TopoDS_Face& face = TopoDS::Face( fExp.Current() );
793 Handle(Poly_Triangulation) triangulation = BRep_Tool::Triangulation ( face, loc );
794 if ( triangulation.IsNull() ) continue;
796 BRepAdaptor_Surface surf( face, false );
797 surfProp.SetSurface( surf );
802 for ( int i = 1; i <= triangulation->NbTriangles(); ++i )
804 Standard_Integer n1,n2,n3;
805 triangulation->Triangles()(i).Get( n1,n2,n3 );
806 p [0] = triangulation->Nodes()(n1).Transformed(loc).XYZ();
807 p [1] = triangulation->Nodes()(n2).Transformed(loc).XYZ();
808 p [2] = triangulation->Nodes()(n3).Transformed(loc).XYZ();
809 uv[0] = triangulation->UVNodes()(n1).XY();
810 uv[1] = triangulation->UVNodes()(n2).XY();
811 uv[2] = triangulation->UVNodes()(n3).XY();
812 surfProp.SetParameters( uv[0].X(), uv[0].Y() );
813 if ( !surfProp.IsCurvatureDefined() )
816 for ( int n = 0; n < 3; ++n ) // get size at triangle nodes
818 surfProp.SetParameters( uv[n].X(), uv[n].Y() );
819 double maxCurv = Max( Abs( surfProp.MaxCurvature()), Abs( surfProp.MinCurvature() ));
820 size[n] = elemSizeForChordalError( _chordalError, 1 / maxCurv );
822 for ( int n1 = 0; n1 < 3; ++n1 ) // limit size along each triangle edge
824 int n2 = ( n1 + 1 ) % 3;
825 double minSize = size[n1], maxSize = size[n2];
826 if ( size[n1] > size[n2] )
827 minSize = size[n2], maxSize = size[n1];
829 if ( maxSize / minSize < 1.2 ) // netgen ignores size difference < 1.2
831 ngMesh.RestrictLocalHLine ( netgen::Point3d( p[n1].X(), p[n1].Y(), p[n1].Z() ),
832 netgen::Point3d( p[n2].X(), p[n2].Y(), p[n2].Z() ),
833 sizeCoef * minSize );
837 gp_XY uvVec( uv[n2] - uv[n1] );
838 double len = ( p[n1] - p[n2] ).Modulus();
839 int nb = int( len / minSize ) + 1;
840 for ( int j = 0; j <= nb; ++j )
842 double r = double( j ) / nb;
843 gp_XY uvj = uv[n1] + r * uvVec;
845 surfProp.SetParameters( uvj.X(), uvj.Y() );
846 double maxCurv = Max( Abs( surfProp.MaxCurvature()), Abs( surfProp.MinCurvature() ));
847 double h = elemSizeForChordalError( _chordalError, 1 / maxCurv );
849 const gp_Pnt& pj = surfProp.Value();
850 netgen::Point3d ngP( pj.X(), pj.Y(), pj.Z());
851 ngMesh.RestrictLocalH( ngP, h * sizeCoef );
860 //================================================================================
862 * \brief Initialize netgen::OCCGeometry with OCCT shape
864 //================================================================================
866 void NETGENPlugin_Mesher::PrepareOCCgeometry(netgen::OCCGeometry& occgeo,
867 const TopoDS_Shape& shape,
869 list< SMESH_subMesh* > * meshedSM,
870 NETGENPlugin_Internals* intern)
872 updateTriangulation( shape );
875 BRepBndLib::Add (shape, bb);
876 double x1,y1,z1,x2,y2,z2;
877 bb.Get (x1,y1,z1,x2,y2,z2);
878 netgen::Point<3> p1 = netgen::Point<3> (x1,y1,z1);
879 netgen::Point<3> p2 = netgen::Point<3> (x2,y2,z2);
880 occgeo.boundingbox = netgen::Box<3> (p1,p2);
882 occgeo.shape = shape;
885 // fill maps of shapes of occgeo with not yet meshed subshapes
887 // get root submeshes
888 list< SMESH_subMesh* > rootSM;
889 const int shapeID = mesh.GetMeshDS()->ShapeToIndex( shape );
890 if ( shapeID > 0 ) { // SMESH_subMesh with ID 0 may exist, don't use it!
891 rootSM.push_back( mesh.GetSubMesh( shape ));
894 for ( TopoDS_Iterator it( shape ); it.More(); it.Next() )
895 rootSM.push_back( mesh.GetSubMesh( it.Value() ));
900 // add subshapes of empty submeshes
901 list< SMESH_subMesh* >::iterator rootIt = rootSM.begin(), rootEnd = rootSM.end();
902 for ( ; rootIt != rootEnd; ++rootIt ) {
903 SMESH_subMesh * root = *rootIt;
904 SMESH_subMeshIteratorPtr smIt = root->getDependsOnIterator(/*includeSelf=*/true,
905 /*complexShapeFirst=*/true);
906 // to find a right orientation of subshapes (PAL20462)
907 TopTools_IndexedMapOfShape subShapes;
908 TopExp::MapShapes(root->GetSubShape(), subShapes);
909 while ( smIt->more() )
911 SMESH_subMesh* sm = smIt->next();
912 TopoDS_Shape shape = sm->GetSubShape();
913 totNbFaces += ( shape.ShapeType() == TopAbs_FACE );
914 if ( intern && intern->isShapeToPrecompute( shape ))
916 if ( !meshedSM || sm->IsEmpty() )
918 if ( shape.ShapeType() != TopAbs_VERTEX )
919 shape = subShapes( subShapes.FindIndex( shape ));// shape -> index -> oriented shape
920 if ( shape.Orientation() >= TopAbs_INTERNAL )
921 shape.Orientation( TopAbs_FORWARD ); // issue 0020676
922 switch ( shape.ShapeType() ) {
923 case TopAbs_FACE : occgeo.fmap.Add( shape ); break;
924 case TopAbs_EDGE : occgeo.emap.Add( shape ); break;
925 case TopAbs_VERTEX: occgeo.vmap.Add( shape ); break;
926 case TopAbs_SOLID :occgeo.somap.Add( shape ); break;
930 // collect submeshes of meshed shapes
933 const int dim = SMESH_Gen::GetShapeDim( shape );
934 meshedSM[ dim ].push_back( sm );
938 occgeo.facemeshstatus.SetSize (totNbFaces);
939 occgeo.facemeshstatus = 0;
940 occgeo.face_maxh_modified.SetSize(totNbFaces);
941 occgeo.face_maxh_modified = 0;
942 occgeo.face_maxh.SetSize(totNbFaces);
943 occgeo.face_maxh = netgen::mparam.maxh;
946 //================================================================================
948 * \brief Return a default min size value suitable for the given geometry.
950 //================================================================================
952 double NETGENPlugin_Mesher::GetDefaultMinSize(const TopoDS_Shape& geom,
953 const double maxSize)
955 updateTriangulation( geom );
959 const int* pi[4] = { &i1, &i2, &i3, &i1 };
962 TopExp_Explorer fExp( geom, TopAbs_FACE );
963 for ( ; fExp.More(); fExp.Next() )
965 Handle(Poly_Triangulation) triangulation =
966 BRep_Tool::Triangulation ( TopoDS::Face( fExp.Current() ), loc);
967 if ( triangulation.IsNull() ) continue;
968 const double fTol = BRep_Tool::Tolerance( TopoDS::Face( fExp.Current() ));
969 const TColgp_Array1OfPnt& points = triangulation->Nodes();
970 const Poly_Array1OfTriangle& trias = triangulation->Triangles();
971 for ( int iT = trias.Lower(); iT <= trias.Upper(); ++iT )
973 trias(iT).Get( i1, i2, i3 );
974 for ( int j = 0; j < 3; ++j )
976 double dist2 = points(*pi[j]).SquareDistance( points( *pi[j+1] ));
977 if ( dist2 < minh && fTol*fTol < dist2 )
979 bb.Add( points(*pi[j]));
983 if ( minh > 0.25 * bb.SquareExtent() ) // simple geometry, rough triangulation
985 minh = 1e-3 * sqrt( bb.SquareExtent());
986 //cout << "BND BOX minh = " <<minh << endl;
990 minh = sqrt( minh ); // triangulation for visualization is rather fine
991 //cout << "TRIANGULATION minh = " <<minh << endl;
993 if ( minh > 0.5 * maxSize )
999 //================================================================================
1001 * \brief Restrict size of elements at a given point
1003 //================================================================================
1005 void NETGENPlugin_Mesher::RestrictLocalSize(netgen::Mesh& ngMesh,
1008 const bool overrideMinH)
1010 if ( size <= std::numeric_limits<double>::min() )
1012 if ( netgen::mparam.minh > size )
1016 ngMesh.SetMinimalH( size );
1017 netgen::mparam.minh = size;
1021 size = netgen::mparam.minh;
1024 netgen::Point3d pi(p.X(), p.Y(), p.Z());
1025 ngMesh.RestrictLocalH( pi, size );
1028 //================================================================================
1030 * \brief fill ngMesh with nodes and elements of computed submeshes
1032 //================================================================================
1034 bool NETGENPlugin_Mesher::FillNgMesh(netgen::OCCGeometry& occgeom,
1035 netgen::Mesh& ngMesh,
1036 vector<const SMDS_MeshNode*>& nodeVec,
1037 const list< SMESH_subMesh* > & meshedSM,
1038 SMESH_MesherHelper* quadHelper,
1039 SMESH_ProxyMesh::Ptr proxyMesh)
1041 TNode2IdMap nodeNgIdMap;
1042 for ( size_t i = 1; i < nodeVec.size(); ++i )
1043 nodeNgIdMap.insert( make_pair( nodeVec[i], i ));
1045 TopTools_MapOfShape visitedShapes;
1046 map< SMESH_subMesh*, set< int > > visitedEdgeSM2Faces;
1047 set< SMESH_subMesh* > computedSM( meshedSM.begin(), meshedSM.end() );
1049 SMESH_MesherHelper helper (*_mesh);
1051 int faceNgID = ngMesh.GetNFD();
1053 list< SMESH_subMesh* >::const_iterator smIt, smEnd = meshedSM.end();
1054 for ( smIt = meshedSM.begin(); smIt != smEnd; ++smIt )
1056 SMESH_subMesh* sm = *smIt;
1057 if ( !visitedShapes.Add( sm->GetSubShape() ))
1060 const SMESHDS_SubMesh * smDS = sm->GetSubMeshDS();
1061 if ( !smDS ) continue;
1063 switch ( sm->GetSubShape().ShapeType() )
1065 case TopAbs_EDGE: { // EDGE
1066 // ----------------------
1067 TopoDS_Edge geomEdge = TopoDS::Edge( sm->GetSubShape() );
1068 if ( geomEdge.Orientation() >= TopAbs_INTERNAL )
1069 geomEdge.Orientation( TopAbs_FORWARD ); // issue 0020676
1071 // Add ng segments for each not meshed FACE the EDGE bounds
1072 PShapeIteratorPtr fIt = helper.GetAncestors( geomEdge, *sm->GetFather(), TopAbs_FACE );
1073 while ( const TopoDS_Shape * anc = fIt->next() )
1075 faceNgID = occgeom.fmap.FindIndex( *anc );
1077 continue; // meshed face
1079 int faceSMDSId = helper.GetMeshDS()->ShapeToIndex( *anc );
1080 if ( visitedEdgeSM2Faces[ sm ].count( faceSMDSId ))
1081 continue; // already treated EDGE
1083 TopoDS_Face face = TopoDS::Face( occgeom.fmap( faceNgID ));
1084 if ( face.Orientation() >= TopAbs_INTERNAL )
1085 face.Orientation( TopAbs_FORWARD ); // issue 0020676
1087 // get all meshed EDGEs of the FACE connected to geomEdge (issue 0021140)
1088 helper.SetSubShape( face );
1089 list< TopoDS_Edge > edges = getConnectedEdges( geomEdge, face, computedSM, helper,
1090 visitedEdgeSM2Faces );
1091 if ( edges.empty() )
1092 continue; // wrong ancestor?
1094 // find out orientation of <edges> within <face>
1095 TopoDS_Edge eNotSeam = edges.front();
1096 if ( helper.HasSeam() )
1098 list< TopoDS_Edge >::iterator eIt = edges.begin();
1099 while ( helper.IsRealSeam( *eIt )) ++eIt;
1100 if ( eIt != edges.end() )
1103 TopAbs_Orientation fOri = helper.GetSubShapeOri( face, eNotSeam );
1104 bool isForwad = ( fOri == eNotSeam.Orientation() || fOri >= TopAbs_INTERNAL );
1106 // get all nodes from connected <edges>
1107 const bool isQuad = smDS->IsQuadratic();
1108 StdMeshers_FaceSide fSide( face, edges, _mesh, isForwad, isQuad, &helper );
1109 const vector<UVPtStruct>& points = fSide.GetUVPtStruct();
1110 if ( points.empty() )
1111 return false; // invalid node params?
1112 int i, nbSeg = fSide.NbSegments();
1114 // remember EDGEs of fSide to treat only once
1115 for ( int iE = 0; iE < fSide.NbEdges(); ++iE )
1116 visitedEdgeSM2Faces[ helper.GetMesh()->GetSubMesh( fSide.Edge(iE )) ].insert(faceSMDSId);
1118 double otherSeamParam = 0;
1119 bool isSeam = false;
1123 int prevNgId = ngNodeId( points[0].node, ngMesh, nodeNgIdMap );
1125 for ( i = 0; i < nbSeg; ++i )
1127 const UVPtStruct& p1 = points[ i ];
1128 const UVPtStruct& p2 = points[ i+1 ];
1130 if ( p1.node->GetPosition()->GetTypeOfPosition() == SMDS_TOP_VERTEX ) //an EDGE begins
1133 if ( helper.IsRealSeam( p1.node->getshapeId() ))
1135 TopoDS_Edge e = fSide.Edge( fSide.EdgeIndex( 0.5 * ( p1.normParam + p2.normParam )));
1136 isSeam = helper.IsRealSeam( e );
1139 otherSeamParam = helper.GetOtherParam( helper.GetPeriodicIndex() & 1 ? p2.u : p2.v );
1143 netgen::Segment seg;
1146 seg[1] = prevNgId = ngNodeId( p2.node, ngMesh, nodeNgIdMap );
1147 // node param on curve
1148 seg.epgeominfo[ 0 ].dist = p1.param;
1149 seg.epgeominfo[ 1 ].dist = p2.param;
1151 seg.epgeominfo[ 0 ].u = p1.u;
1152 seg.epgeominfo[ 0 ].v = p1.v;
1153 seg.epgeominfo[ 1 ].u = p2.u;
1154 seg.epgeominfo[ 1 ].v = p2.v;
1156 //geomEdge = fSide.Edge( fSide.EdgeIndex( 0.5 * ( p1.normParam + p2.normParam )));
1157 //seg.epgeominfo[ 0 ].edgenr = seg.epgeominfo[ 1 ].edgenr = occgeom.emap.FindIndex( geomEdge );
1159 //seg.epgeominfo[ iEnd ].edgenr = edgeID; // = geom.emap.FindIndex(edge);
1160 seg.si = faceNgID; // = geom.fmap.FindIndex (face);
1161 seg.edgenr = ngMesh.GetNSeg() + 1; // segment id
1162 ngMesh.AddSegment (seg);
1164 SMESH_TNodeXYZ np1( p1.node ), np2( p2.node );
1165 RestrictLocalSize( ngMesh, 0.5*(np1+np2), (np1-np2).Modulus() );
1167 #ifdef DUMP_SEGMENTS
1168 cout << "Segment: " << seg.edgenr << " on SMESH face " << helper.GetMeshDS()->ShapeToIndex( face ) << endl
1169 << "\tface index: " << seg.si << endl
1170 << "\tp1: " << seg[0] << endl
1171 << "\tp2: " << seg[1] << endl
1172 << "\tp0 param: " << seg.epgeominfo[ 0 ].dist << endl
1173 << "\tp0 uv: " << seg.epgeominfo[ 0 ].u <<", "<< seg.epgeominfo[ 0 ].v << endl
1174 //<< "\tp0 edge: " << seg.epgeominfo[ 0 ].edgenr << endl
1175 << "\tp1 param: " << seg.epgeominfo[ 1 ].dist << endl
1176 << "\tp1 uv: " << seg.epgeominfo[ 1 ].u <<", "<< seg.epgeominfo[ 1 ].v << endl;
1177 //<< "\tp1 edge: " << seg.epgeominfo[ 1 ].edgenr << endl;
1181 if ( helper.GetPeriodicIndex() && 1 ) {
1182 seg.epgeominfo[ 0 ].u = otherSeamParam;
1183 seg.epgeominfo[ 1 ].u = otherSeamParam;
1184 swap (seg.epgeominfo[0].v, seg.epgeominfo[1].v);
1186 seg.epgeominfo[ 0 ].v = otherSeamParam;
1187 seg.epgeominfo[ 1 ].v = otherSeamParam;
1188 swap (seg.epgeominfo[0].u, seg.epgeominfo[1].u);
1190 swap( seg[0], seg[1] );
1191 swap( seg.epgeominfo[0].dist, seg.epgeominfo[1].dist );
1192 seg.edgenr = ngMesh.GetNSeg() + 1; // segment id
1193 ngMesh.AddSegment( seg );
1194 #ifdef DUMP_SEGMENTS
1195 cout << "Segment: " << seg.edgenr << endl
1196 << "\t is SEAM (reverse) of the previous. "
1197 << " Other " << (helper.GetPeriodicIndex() && 1 ? "U" : "V")
1198 << " = " << otherSeamParam << endl;
1201 else if ( fOri == TopAbs_INTERNAL )
1203 swap( seg[0], seg[1] );
1204 swap( seg.epgeominfo[0], seg.epgeominfo[1] );
1205 seg.edgenr = ngMesh.GetNSeg() + 1; // segment id
1206 ngMesh.AddSegment( seg );
1207 #ifdef DUMP_SEGMENTS
1208 cout << "Segment: " << seg.edgenr << endl << "\t is REVERSE of the previous" << endl;
1212 } // loop on geomEdge ancestors
1214 if ( quadHelper ) // remember medium nodes of sub-meshes
1216 SMDS_ElemIteratorPtr edges = smDS->GetElements();
1217 while ( edges->more() )
1219 const SMDS_MeshElement* e = edges->next();
1220 if ( !quadHelper->AddTLinks( static_cast< const SMDS_MeshEdge*>( e )))
1226 } // case TopAbs_EDGE
1228 case TopAbs_FACE: { // FACE
1229 // ----------------------
1230 const TopoDS_Face& geomFace = TopoDS::Face( sm->GetSubShape() );
1231 helper.SetSubShape( geomFace );
1232 bool isInternalFace = ( geomFace.Orientation() == TopAbs_INTERNAL );
1234 // Find solids the geomFace bounds
1235 int solidID1 = 0, solidID2 = 0;
1237 PShapeIteratorPtr solidIt = helper.GetAncestors( geomFace, *sm->GetFather(), TopAbs_SOLID);
1238 while ( const TopoDS_Shape * solid = solidIt->next() )
1240 int id = occgeom.somap.FindIndex ( *solid );
1241 if ( solidID1 && id != solidID1 ) solidID2 = id;
1245 if ( proxyMesh && proxyMesh->GetProxySubMesh( geomFace ))
1247 // if a proxy sub-mesh contains temporary faces, then these faces
1248 // should be used to mesh only one SOLID
1249 bool hasTmp = false;
1250 smDS = proxyMesh->GetSubMesh( geomFace );
1251 SMDS_ElemIteratorPtr faces = smDS->GetElements();
1252 while ( faces->more() )
1254 const SMDS_MeshElement* f = faces->next();
1255 if ( proxyMesh->IsTemporary( f ))
1258 std::vector<const SMDS_MeshNode*> fNodes( f->begin_nodes(), f->end_nodes() );
1259 std::vector<const SMDS_MeshElement*> vols;
1260 if ( _mesh->GetMeshDS()->GetElementsByNodes( fNodes, vols, SMDSAbs_Volume ) == 1 )
1262 int geomID = vols[0]->getshapeId();
1263 const TopoDS_Shape& solid = helper.GetMeshDS()->IndexToShape( geomID );
1264 if ( !solid.IsNull() )
1265 solidID1 = occgeom.somap.FindIndex ( solid );
1271 // exclude faces generated by NETGEN from computation of 3D mesh
1272 const int fID = occgeom.fmap.FindIndex( geomFace );
1273 if ( !hasTmp ) // shrunk mesh
1275 // move netgen points according to moved nodes
1276 SMESH_subMeshIteratorPtr smIt = sm->getDependsOnIterator(/*includeSelf=*/true);
1277 while ( smIt->more() )
1279 SMESH_subMesh* sub = smIt->next();
1280 if ( !sub->GetSubMeshDS() ) continue;
1281 SMDS_NodeIteratorPtr nodeIt = sub->GetSubMeshDS()->GetNodes();
1282 while ( nodeIt->more() )
1284 const SMDS_MeshNode* n = nodeIt->next();
1285 int ngID = ngNodeId( n, ngMesh, nodeNgIdMap );
1286 netgen::MeshPoint& ngPoint = ngMesh.Point( ngID );
1287 ngPoint(0) = n->X();
1288 ngPoint(1) = n->Y();
1289 ngPoint(2) = n->Z();
1292 // remove faces near boundary to avoid their overlapping
1293 // with shrunk faces
1294 for ( int i = 1; i <= ngMesh.GetNSE(); ++i )
1296 const netgen::Element2d& elem = ngMesh.SurfaceElement(i);
1297 if ( elem.GetIndex() == fID )
1299 for ( int iN = 0; iN < elem.GetNP(); ++iN )
1300 if ( ngMesh[ elem[ iN ]].Type() != netgen::SURFACEPOINT )
1302 ngMesh.DeleteSurfaceElement( i );
1311 ngMesh.AddFaceDescriptor( netgen::FaceDescriptor( faceNgID,/*solid1=*/0,/*solid2=*/0,0 ));
1312 for (int i = 1; i <= ngMesh.GetNSE(); ++i )
1314 const netgen::Element2d& elem = ngMesh.SurfaceElement(i);
1315 if ( elem.GetIndex() == fID )
1316 const_cast< netgen::Element2d& >( elem ).SetIndex( faceNgID );
1320 // Add ng face descriptors of meshed faces
1322 ngMesh.AddFaceDescriptor( netgen::FaceDescriptor( faceNgID, solidID1, solidID2, 0 ));
1324 // if second oreder is required, even already meshed faces must be passed to NETGEN
1325 int fID = occgeom.fmap.Add( geomFace );
1326 if ( occgeom.facemeshstatus.Size() < fID ) occgeom.facemeshstatus.SetSize( fID );
1327 occgeom.facemeshstatus[ fID-1 ] = netgen::FACE_MESHED_OK;
1328 while ( fID < faceNgID ) // geomFace is already in occgeom.fmap, add a copy
1330 fID = occgeom.fmap.Add( BRepBuilderAPI_Copy( geomFace, /*copyGeom=*/false ));
1331 if ( occgeom.facemeshstatus.Size() < fID ) occgeom.facemeshstatus.SetSize( fID );
1332 occgeom.facemeshstatus[ fID-1 ] = netgen::FACE_MESHED_OK;
1334 // Problem with the second order in a quadrangular mesh remains.
1335 // 1) All quadrangles generated by NETGEN are moved to an inexistent face
1336 // by FillSMesh() (find "AddFaceDescriptor")
1337 // 2) Temporary triangles generated by StdMeshers_QuadToTriaAdaptor
1338 // are on faces where quadrangles were.
1339 // Due to these 2 points, wrong geom faces are used while conversion to quadratic
1340 // of the mentioned above quadrangles and triangles
1342 // Orient the face correctly in solidID1 (issue 0020206)
1343 bool reverse = false;
1345 TopoDS_Shape solid = occgeom.somap( solidID1 );
1346 TopAbs_Orientation faceOriInSolid = helper.GetSubShapeOri( solid, geomFace );
1347 if ( faceOriInSolid >= 0 )
1349 helper.IsReversedSubMesh( TopoDS::Face( geomFace.Oriented( faceOriInSolid )));
1352 // Add surface elements
1354 netgen::Element2d tri(3);
1355 tri.SetIndex( faceNgID );
1356 SMESH_TNodeXYZ xyz[3];
1358 #ifdef DUMP_TRIANGLES
1359 cout << "SMESH face " << helper.GetMeshDS()->ShapeToIndex( geomFace )
1360 << " internal="<<isInternalFace << endl;
1363 SMDS_ElemIteratorPtr faces = smDS->GetElements();
1364 while ( faces->more() )
1366 const SMDS_MeshElement* f = faces->next();
1367 if ( f->NbNodes() % 3 != 0 ) // not triangle
1369 PShapeIteratorPtr solidIt=helper.GetAncestors(geomFace,*sm->GetFather(),TopAbs_SOLID);
1370 if ( const TopoDS_Shape * solid = solidIt->next() )
1371 sm = _mesh->GetSubMesh( *solid );
1372 SMESH_BadInputElements* badElems =
1373 new SMESH_BadInputElements( helper.GetMeshDS(), COMPERR_BAD_INPUT_MESH,
1374 "Not triangle sub-mesh");
1376 sm->GetComputeError().reset( badElems );
1380 for ( int i = 0; i < 3; ++i )
1382 const SMDS_MeshNode* node = f->GetNode( i ), * inFaceNode=0;
1385 // get node UV on face
1386 int shapeID = node->getshapeId();
1387 if ( helper.IsSeamShape( shapeID ))
1389 if ( helper.IsSeamShape( f->GetNodeWrap( i+1 )->getshapeId() ))
1390 inFaceNode = f->GetNodeWrap( i-1 );
1392 inFaceNode = f->GetNodeWrap( i+1 );
1394 gp_XY uv = helper.GetNodeUV( geomFace, node, inFaceNode );
1396 int ind = reverse ? 3-i : i+1;
1397 tri.GeomInfoPi(ind).u = uv.X();
1398 tri.GeomInfoPi(ind).v = uv.Y();
1399 tri.PNum (ind) = ngNodeId( node, ngMesh, nodeNgIdMap );
1402 // pass a triangle size to NG size-map
1403 double size = ( ( xyz[0] - xyz[1] ).Modulus() +
1404 ( xyz[1] - xyz[2] ).Modulus() +
1405 ( xyz[2] - xyz[0] ).Modulus() ) / 3;
1406 gp_XYZ gc = ( xyz[0] + xyz[1] + xyz[2] ) / 3;
1407 RestrictLocalSize( ngMesh, gc, size, /*overrideMinH=*/false );
1409 ngMesh.AddSurfaceElement (tri);
1410 #ifdef DUMP_TRIANGLES
1411 cout << tri << endl;
1414 if ( isInternalFace )
1416 swap( tri[1], tri[2] );
1417 ngMesh.AddSurfaceElement (tri);
1418 #ifdef DUMP_TRIANGLES
1419 cout << tri << endl;
1424 if ( quadHelper ) // remember medium nodes of sub-meshes
1426 SMDS_ElemIteratorPtr faces = smDS->GetElements();
1427 while ( faces->more() )
1429 const SMDS_MeshElement* f = faces->next();
1430 if ( !quadHelper->AddTLinks( static_cast< const SMDS_MeshFace*>( f )))
1436 } // case TopAbs_FACE
1438 case TopAbs_VERTEX: { // VERTEX
1439 // --------------------------
1440 // issue 0021405. Add node only if a VERTEX is shared by a not meshed EDGE,
1441 // else netgen removes a free node and nodeVector becomes invalid
1442 PShapeIteratorPtr ansIt = helper.GetAncestors( sm->GetSubShape(),
1446 while ( const TopoDS_Shape* e = ansIt->next() )
1448 SMESH_subMesh* eSub = helper.GetMesh()->GetSubMesh( *e );
1449 if (( toAdd = ( eSub->IsEmpty() && !SMESH_Algo::isDegenerated( TopoDS::Edge( *e )))))
1454 SMDS_NodeIteratorPtr nodeIt = smDS->GetNodes();
1455 if ( nodeIt->more() )
1456 ngNodeId( nodeIt->next(), ngMesh, nodeNgIdMap );
1462 } // loop on submeshes
1465 nodeVec.resize( ngMesh.GetNP() + 1 );
1466 TNode2IdMap::iterator node_NgId, nodeNgIdEnd = nodeNgIdMap.end();
1467 for ( node_NgId = nodeNgIdMap.begin(); node_NgId != nodeNgIdEnd; ++node_NgId)
1468 nodeVec[ node_NgId->second ] = node_NgId->first;
1473 //================================================================================
1475 * \brief Duplicate mesh faces on internal geom faces
1477 //================================================================================
1479 void NETGENPlugin_Mesher::FixIntFaces(const netgen::OCCGeometry& occgeom,
1480 netgen::Mesh& ngMesh,
1481 NETGENPlugin_Internals& internalShapes)
1483 SMESHDS_Mesh* meshDS = internalShapes.getMesh().GetMeshDS();
1485 // find ng indices of internal faces
1487 for ( int ngFaceID = 1; ngFaceID <= occgeom.fmap.Extent(); ++ngFaceID )
1489 int smeshID = meshDS->ShapeToIndex( occgeom.fmap( ngFaceID ));
1490 if ( internalShapes.isInternalShape( smeshID ))
1491 ngFaceIds.insert( ngFaceID );
1493 if ( !ngFaceIds.empty() )
1496 int i, nbFaces = ngMesh.GetNSE();
1497 for ( i = 1; i <= nbFaces; ++i)
1499 netgen::Element2d elem = ngMesh.SurfaceElement(i);
1500 if ( ngFaceIds.count( elem.GetIndex() ))
1502 swap( elem[1], elem[2] );
1503 ngMesh.AddSurfaceElement (elem);
1509 //================================================================================
1511 * \brief Tries to heal the mesh on a FACE. The FACE is supposed to be partially
1512 * meshed due to NETGEN failure
1513 * \param [in] occgeom - geometry
1514 * \param [in,out] ngMesh - the mesh to fix
1515 * \param [inout] faceID - ID of the FACE to fix the mesh on
1516 * \return bool - is mesh is or becomes OK
1518 //================================================================================
1520 bool NETGENPlugin_Mesher::FixFaceMesh(const netgen::OCCGeometry& occgeom,
1521 netgen::Mesh& ngMesh,
1524 // we address a case where the FACE is almost fully meshed except small holes
1525 // of usually triangular shape at FACE boundary (IPAL52861)
1527 // The case appeared to be not simple: holes only look triangular but
1528 // indeed are a self intersecting polygon. A reason of the bug was in coincident
1529 // NG points on a seam edge. But the code below is very nice, leave it for
1534 if ( occgeom.fmap.Extent() < faceID )
1536 //const TopoDS_Face& face = TopoDS::Face( occgeom.fmap( faceID ));
1538 // find free links on the FACE
1539 NCollection_Map<Link> linkMap;
1540 for ( int iF = 1; iF <= ngMesh.GetNSE(); ++iF )
1542 const netgen::Element2d& elem = ngMesh.SurfaceElement(iF);
1543 if ( faceID != elem.GetIndex() )
1545 int n0 = elem[ elem.GetNP() - 1 ];
1546 for ( int i = 0; i < elem.GetNP(); ++i )
1549 Link link( n0, n1 );
1550 if ( !linkMap.Add( link ))
1551 linkMap.Remove( link );
1555 // add/remove boundary links
1556 for ( int iSeg = 1; iSeg <= ngMesh.GetNSeg(); ++iSeg )
1558 const netgen::Segment& seg = ngMesh.LineSegment( iSeg );
1559 if ( seg.si != faceID ) // !edgeIDs.Contains( seg.edgenr ))
1561 Link link( seg[1], seg[0] ); // reverse!!!
1562 if ( !linkMap.Add( link ))
1563 linkMap.Remove( link );
1565 if ( linkMap.IsEmpty() )
1567 if ( linkMap.Extent() < 3 )
1570 // make triangles of the links
1572 netgen::Element2d tri(3);
1573 tri.SetIndex ( faceID );
1575 NCollection_Map<Link>::Iterator linkIt( linkMap );
1576 Link link1 = linkIt.Value();
1577 // look for a link connected to link1
1578 NCollection_Map<Link>::Iterator linkIt2 = linkIt;
1579 for ( linkIt2.Next(); linkIt2.More(); linkIt2.Next() )
1581 const Link& link2 = linkIt2.Value();
1582 if ( link2.IsConnected( link1 ))
1584 // look for a link connected to both link1 and link2
1585 NCollection_Map<Link>::Iterator linkIt3 = linkIt2;
1586 for ( linkIt3.Next(); linkIt3.More(); linkIt3.Next() )
1588 const Link& link3 = linkIt3.Value();
1589 if ( link3.IsConnected( link1 ) &&
1590 link3.IsConnected( link2 ) )
1595 tri[2] = ( link2.Contains( link1.n1 ) ? link2.n1 : link3.n1 );
1596 if ( tri[0] == tri[2] || tri[1] == tri[2] )
1598 ngMesh.AddSurfaceElement( tri );
1600 // prepare for the next tria search
1601 if ( linkMap.Extent() == 3 )
1603 linkMap.Remove( link3 );
1604 linkMap.Remove( link2 );
1606 linkMap.Remove( link1 );
1607 link1 = linkIt.Value();
1620 //================================================================================
1621 // define gp_XY_Subtracted pointer to function calling gp_XY::Subtracted(gp_XY)
1622 gp_XY_FunPtr(Subtracted);
1623 //gp_XY_FunPtr(Added);
1625 //================================================================================
1627 * \brief Evaluate distance between two 2d points along the surface
1629 //================================================================================
1631 double evalDist( const gp_XY& uv1,
1633 const Handle(Geom_Surface)& surf,
1634 const int stopHandler=-1)
1636 if ( stopHandler > 0 ) // continue recursion
1638 gp_XY mid = SMESH_MesherHelper::GetMiddleUV( surf, uv1, uv2 );
1639 return evalDist( uv1,mid, surf, stopHandler-1 ) + evalDist( mid,uv2, surf, stopHandler-1 );
1641 double dist3D = surf->Value( uv1.X(), uv1.Y() ).Distance( surf->Value( uv2.X(), uv2.Y() ));
1642 if ( stopHandler == 0 ) // stop recursion
1645 // start recursion if necessary
1646 double dist2D = SMESH_MesherHelper::ApplyIn2D(surf, uv1, uv2, gp_XY_Subtracted, 0).Modulus();
1647 if ( fabs( dist3D - dist2D ) < dist2D * 1e-10 )
1648 return dist3D; // equal parametrization of a planar surface
1650 return evalDist( uv1, uv2, surf, 3 ); // start recursion
1653 //================================================================================
1655 * \brief Data of vertex internal in geom face
1657 //================================================================================
1661 gp_XY uv; //!< UV in face parametric space
1662 int ngId; //!< ng id of corresponding node
1663 gp_XY uvClose; //!< UV of closest boundary node
1664 int ngIdClose; //!< ng id of closest boundary node
1667 //================================================================================
1669 * \brief Data of vertex internal in solid
1671 //================================================================================
1675 int ngId; //!< ng id of corresponding node
1676 int ngIdClose; //!< ng id of closest 2d mesh element
1677 int ngIdCloseN; //!< ng id of closest node of the closest 2d mesh element
1680 inline double dist2( const netgen::MeshPoint& p1, const netgen::MeshPoint& p2 )
1682 return gp_Pnt( NGPOINT_COORDS(p1)).SquareDistance( gp_Pnt( NGPOINT_COORDS(p2)));
1685 // inline double dist2(const netgen::MeshPoint& p, const SMDS_MeshNode* n )
1687 // return gp_Pnt( NGPOINT_COORDS(p)).SquareDistance( SMESH_NodeXYZ(n));
1691 //================================================================================
1693 * \brief Make netgen take internal vertices in faces into account by adding
1694 * segments including internal vertices
1696 * This function works in supposition that 1D mesh is already computed in ngMesh
1698 //================================================================================
1700 void NETGENPlugin_Mesher::AddIntVerticesInFaces(const netgen::OCCGeometry& occgeom,
1701 netgen::Mesh& ngMesh,
1702 vector<const SMDS_MeshNode*>& nodeVec,
1703 NETGENPlugin_Internals& internalShapes)
1705 if ((int) nodeVec.size() < ngMesh.GetNP() )
1706 nodeVec.resize( ngMesh.GetNP(), 0 );
1708 SMESHDS_Mesh* meshDS = internalShapes.getMesh().GetMeshDS();
1709 SMESH_MesherHelper helper( internalShapes.getMesh() );
1711 const map<int,list<int> >& face2Vert = internalShapes.getFacesWithVertices();
1712 map<int,list<int> >::const_iterator f2v = face2Vert.begin();
1713 for ( ; f2v != face2Vert.end(); ++f2v )
1715 const TopoDS_Face& face = TopoDS::Face( meshDS->IndexToShape( f2v->first ));
1716 if ( face.IsNull() ) continue;
1717 int faceNgID = occgeom.fmap.FindIndex (face);
1718 if ( faceNgID < 0 ) continue;
1720 TopLoc_Location loc;
1721 Handle(Geom_Surface) surf = BRep_Tool::Surface(face,loc);
1723 helper.SetSubShape( face );
1724 helper.SetElementsOnShape( true );
1726 // Get data of internal vertices and add them to ngMesh
1728 multimap< double, TIntVData > dist2VData; // sort vertices by distance from boundary nodes
1730 int i, nbSegInit = ngMesh.GetNSeg();
1732 // boundary characteristics
1733 double totSegLen2D = 0;
1736 const list<int>& iVertices = f2v->second;
1737 list<int>::const_iterator iv = iVertices.begin();
1738 for ( int nbV = 0; iv != iVertices.end(); ++iv, nbV++ )
1741 // get node on vertex
1742 const TopoDS_Vertex V = TopoDS::Vertex( meshDS->IndexToShape( *iv ));
1743 const SMDS_MeshNode * nV = SMESH_Algo::VertexNode( V, meshDS );
1746 SMESH_subMesh* sm = helper.GetMesh()->GetSubMesh( V );
1747 sm->ComputeStateEngine( SMESH_subMesh::COMPUTE );
1748 nV = SMESH_Algo::VertexNode( V, meshDS );
1749 if ( !nV ) continue;
1752 netgen::MeshPoint mp( netgen::Point<3> (nV->X(), nV->Y(), nV->Z()) );
1753 ngMesh.AddPoint ( mp, 1, netgen::EDGEPOINT );
1754 vData.ngId = ngMesh.GetNP();
1755 nodeVec.push_back( nV );
1759 vData.uv = helper.GetNodeUV( face, nV, 0, &uvOK );
1760 if ( !uvOK ) helper.CheckNodeUV( face, nV, vData.uv, BRep_Tool::Tolerance(V),/*force=*/1);
1762 // loop on all segments of the face to find the node closest to vertex and to count
1763 // average segment 2d length
1764 double closeDist2 = numeric_limits<double>::max(), dist2;
1766 for (i = 1; i <= ngMesh.GetNSeg(); ++i)
1768 netgen::Segment & seg = ngMesh.LineSegment(i);
1769 if ( seg.si != faceNgID ) continue;
1771 for ( int iEnd = 0; iEnd < 2; ++iEnd)
1773 uv[iEnd].SetCoord( seg.epgeominfo[iEnd].u, seg.epgeominfo[iEnd].v );
1774 if ( ngIdLast == seg[ iEnd ] ) continue;
1775 dist2 = helper.ApplyIn2D(surf, uv[iEnd], vData.uv, gp_XY_Subtracted,0).SquareModulus();
1776 if ( dist2 < closeDist2 )
1777 vData.ngIdClose = seg[ iEnd ], vData.uvClose = uv[iEnd], closeDist2 = dist2;
1778 ngIdLast = seg[ iEnd ];
1782 totSegLen2D += helper.ApplyIn2D(surf, uv[0], uv[1], gp_XY_Subtracted, false).Modulus();
1786 dist2VData.insert( make_pair( closeDist2, vData ));
1789 if ( totNbSeg == 0 ) break;
1790 double avgSegLen2d = totSegLen2D / totNbSeg;
1792 // Loop on vertices to add segments
1794 multimap< double, TIntVData >::iterator dist_vData = dist2VData.begin();
1795 for ( ; dist_vData != dist2VData.end(); ++dist_vData )
1797 double closeDist2 = dist_vData->first, dist2;
1798 TIntVData & vData = dist_vData->second;
1800 // try to find more close node among segments added for internal vertices
1801 for (i = nbSegInit+1; i <= ngMesh.GetNSeg(); ++i)
1803 netgen::Segment & seg = ngMesh.LineSegment(i);
1804 if ( seg.si != faceNgID ) continue;
1806 for ( int iEnd = 0; iEnd < 2; ++iEnd)
1808 uv[iEnd].SetCoord( seg.epgeominfo[iEnd].u, seg.epgeominfo[iEnd].v );
1809 dist2 = helper.ApplyIn2D(surf, uv[iEnd], vData.uv, gp_XY_Subtracted,0).SquareModulus();
1810 if ( dist2 < closeDist2 )
1811 vData.ngIdClose = seg[ iEnd ], vData.uvClose = uv[iEnd], closeDist2 = dist2;
1814 // decide whether to use the closest node as the second end of segment or to
1815 // create a new point
1816 int segEnd1 = vData.ngId;
1817 int segEnd2 = vData.ngIdClose; // to use closest node
1818 gp_XY uvV = vData.uv, uvP = vData.uvClose;
1819 double segLenHint = ngMesh.GetH( ngMesh.Point( vData.ngId ));
1820 double nodeDist2D = sqrt( closeDist2 );
1821 double nodeDist3D = evalDist( vData.uv, vData.uvClose, surf );
1822 bool avgLenOK = ( avgSegLen2d < 0.75 * nodeDist2D );
1823 bool hintLenOK = ( segLenHint < 0.75 * nodeDist3D );
1824 //cout << "uvV " << uvV.X() <<","<<uvV.Y() << " ";
1825 if ( hintLenOK || avgLenOK )
1827 // create a point between the closest node and V
1830 double r = min( 0.5, ( hintLenOK ? segLenHint/nodeDist3D : avgSegLen2d/nodeDist2D ));
1831 // direction from V to closet node in 2D
1832 gp_Dir2d v2n( helper.ApplyIn2D(surf, uvP, uvV, gp_XY_Subtracted, false ));
1834 uvP = vData.uv + r * nodeDist2D * v2n.XY();
1835 gp_Pnt P = surf->Value( uvP.X(), uvP.Y() ).Transformed( loc );
1837 netgen::MeshPoint mp( netgen::Point<3> (P.X(), P.Y(), P.Z()));
1838 ngMesh.AddPoint ( mp, 1, netgen::EDGEPOINT );
1839 segEnd2 = ngMesh.GetNP();
1840 //cout << "Middle " << r << " uv " << uvP.X() << "," << uvP.Y() << "( " << ngMesh.Point(segEnd2).X()<<","<<ngMesh.Point(segEnd2).Y()<<","<<ngMesh.Point(segEnd2).Z()<<" )"<< endl;
1841 SMDS_MeshNode * nP = helper.AddNode(P.X(), P.Y(), P.Z());
1842 nodeVec.push_back( nP );
1844 //else cout << "at Node " << " uv " << uvP.X() << "," << uvP.Y() << endl;
1847 netgen::Segment seg;
1849 if ( segEnd1 > segEnd2 ) swap( segEnd1, segEnd2 ), swap( uvV, uvP );
1850 seg[0] = segEnd1; // ng node id
1851 seg[1] = segEnd2; // ng node id
1852 seg.edgenr = ngMesh.GetNSeg() + 1;// segment id
1855 seg.epgeominfo[ 0 ].dist = 0; // param on curve
1856 seg.epgeominfo[ 0 ].u = uvV.X();
1857 seg.epgeominfo[ 0 ].v = uvV.Y();
1858 seg.epgeominfo[ 1 ].dist = 1; // param on curve
1859 seg.epgeominfo[ 1 ].u = uvP.X();
1860 seg.epgeominfo[ 1 ].v = uvP.Y();
1862 // seg.epgeominfo[ 0 ].edgenr = 10; // = geom.emap.FindIndex(edge);
1863 // seg.epgeominfo[ 1 ].edgenr = 10; // = geom.emap.FindIndex(edge);
1865 ngMesh.AddSegment (seg);
1867 // add reverse segment
1868 swap( seg[0], seg[1] );
1869 swap( seg.epgeominfo[0], seg.epgeominfo[1] );
1870 seg.edgenr = ngMesh.GetNSeg() + 1; // segment id
1871 ngMesh.AddSegment (seg);
1877 //================================================================================
1879 * \brief Make netgen take internal vertices in solids into account by adding
1880 * faces including internal vertices
1882 * This function works in supposition that 2D mesh is already computed in ngMesh
1884 //================================================================================
1886 void NETGENPlugin_Mesher::AddIntVerticesInSolids(const netgen::OCCGeometry& occgeom,
1887 netgen::Mesh& ngMesh,
1888 vector<const SMDS_MeshNode*>& nodeVec,
1889 NETGENPlugin_Internals& internalShapes)
1891 #ifdef DUMP_TRIANGLES_SCRIPT
1892 // create a python script making a mesh containing triangles added for internal vertices
1893 ofstream py(DUMP_TRIANGLES_SCRIPT);
1894 py << "import SMESH"<< endl
1895 << "from salome.smesh import smeshBuilder"<<endl
1896 << "smesh = smeshBuilder.New()"<<endl
1897 << "m = smesh.Mesh(name='triangles')" << endl;
1899 if ((int) nodeVec.size() < ngMesh.GetNP() )
1900 nodeVec.resize( ngMesh.GetNP(), 0 );
1902 SMESHDS_Mesh* meshDS = internalShapes.getMesh().GetMeshDS();
1903 SMESH_MesherHelper helper( internalShapes.getMesh() );
1905 const map<int,list<int> >& so2Vert = internalShapes.getSolidsWithVertices();
1906 map<int,list<int> >::const_iterator s2v = so2Vert.begin();
1907 for ( ; s2v != so2Vert.end(); ++s2v )
1909 const TopoDS_Shape& solid = meshDS->IndexToShape( s2v->first );
1910 if ( solid.IsNull() ) continue;
1911 int solidNgID = occgeom.somap.FindIndex (solid);
1912 if ( solidNgID < 0 && !occgeom.somap.IsEmpty() ) continue;
1914 helper.SetSubShape( solid );
1915 helper.SetElementsOnShape( true );
1917 // find ng indices of faces within the solid
1919 for (TopExp_Explorer fExp(solid, TopAbs_FACE); fExp.More(); fExp.Next() )
1920 ngFaceIds.insert( occgeom.fmap.FindIndex( fExp.Current() ));
1921 if ( ngFaceIds.size() == 1 && *ngFaceIds.begin() == 0 )
1922 ngFaceIds.insert( 1 );
1924 // Get data of internal vertices and add them to ngMesh
1926 multimap< double, TIntVSoData > dist2VData; // sort vertices by distance from ng faces
1928 int i, nbFaceInit = ngMesh.GetNSE();
1930 // boundary characteristics
1931 double totSegLen = 0;
1934 const list<int>& iVertices = s2v->second;
1935 list<int>::const_iterator iv = iVertices.begin();
1936 for ( int nbV = 0; iv != iVertices.end(); ++iv, nbV++ )
1939 const TopoDS_Vertex V = TopoDS::Vertex( meshDS->IndexToShape( *iv ));
1941 // get node on vertex
1942 const SMDS_MeshNode * nV = SMESH_Algo::VertexNode( V, meshDS );
1945 SMESH_subMesh* sm = helper.GetMesh()->GetSubMesh( V );
1946 sm->ComputeStateEngine( SMESH_subMesh::COMPUTE );
1947 nV = SMESH_Algo::VertexNode( V, meshDS );
1948 if ( !nV ) continue;
1951 netgen::MeshPoint mpV( netgen::Point<3> (nV->X(), nV->Y(), nV->Z()) );
1952 ngMesh.AddPoint ( mpV, 1, netgen::FIXEDPOINT );
1953 vData.ngId = ngMesh.GetNP();
1954 nodeVec.push_back( nV );
1956 // loop on all 2d elements to find the one closest to vertex and to count
1957 // average segment length
1958 double closeDist2 = numeric_limits<double>::max(), avgDist2;
1959 for (i = 1; i <= ngMesh.GetNSE(); ++i)
1961 const netgen::Element2d& elem = ngMesh.SurfaceElement(i);
1962 if ( !ngFaceIds.count( elem.GetIndex() )) continue;
1964 multimap< double, int> dist2nID; // sort nodes of element by distance from V
1965 for ( int j = 0; j < elem.GetNP(); ++j)
1967 netgen::MeshPoint mp = ngMesh.Point( elem[j] );
1968 double d2 = dist2( mpV, mp );
1969 dist2nID.insert( make_pair( d2, elem[j] ));
1970 avgDist2 += d2 / elem.GetNP();
1972 totNbSeg++, totSegLen+= sqrt( dist2( mp, ngMesh.Point( elem[(j+1)%elem.GetNP()])));
1974 double dist = dist2nID.begin()->first; //avgDist2;
1975 if ( dist < closeDist2 )
1976 vData.ngIdClose= i, vData.ngIdCloseN= dist2nID.begin()->second, closeDist2= dist;
1978 dist2VData.insert( make_pair( closeDist2, vData ));
1981 if ( totNbSeg == 0 ) break;
1982 double avgSegLen = totSegLen / totNbSeg;
1984 // Loop on vertices to add triangles
1986 multimap< double, TIntVSoData >::iterator dist_vData = dist2VData.begin();
1987 for ( ; dist_vData != dist2VData.end(); ++dist_vData )
1989 double closeDist2 = dist_vData->first;
1990 TIntVSoData & vData = dist_vData->second;
1992 const netgen::MeshPoint& mpV = ngMesh.Point( vData.ngId );
1994 // try to find more close face among ones added for internal vertices
1995 for (i = nbFaceInit+1; i <= ngMesh.GetNSE(); ++i)
1997 double avgDist2 = 0;
1998 multimap< double, int> dist2nID;
1999 const netgen::Element2d& elem = ngMesh.SurfaceElement(i);
2000 for ( int j = 0; j < elem.GetNP(); ++j)
2002 double d = dist2( mpV, ngMesh.Point( elem[j] ));
2003 dist2nID.insert( make_pair( d, elem[j] ));
2004 avgDist2 += d / elem.GetNP();
2005 if ( avgDist2 < closeDist2 )
2006 vData.ngIdClose= i, vData.ngIdCloseN= dist2nID.begin()->second, closeDist2= avgDist2;
2009 // sort nodes of the closest face by angle with vector from V to the closest node
2010 const double tol = numeric_limits<double>::min();
2011 map< double, int > angle2ID;
2012 const netgen::Element2d& closeFace = ngMesh.SurfaceElement( vData.ngIdClose );
2013 netgen::MeshPoint mp[2];
2014 mp[0] = ngMesh.Point( vData.ngIdCloseN );
2015 gp_XYZ p1( NGPOINT_COORDS( mp[0] ));
2016 gp_XYZ pV( NGPOINT_COORDS( mpV ));
2017 gp_Vec v2p1( pV, p1 );
2018 double distN1 = v2p1.Magnitude();
2019 if ( distN1 <= tol ) continue;
2021 for ( int j = 0; j < closeFace.GetNP(); ++j)
2023 mp[1] = ngMesh.Point( closeFace[j] );
2024 gp_Vec v2p( pV, gp_Pnt( NGPOINT_COORDS( mp[1] )) );
2025 angle2ID.insert( make_pair( v2p1.Angle( v2p ), closeFace[j]));
2027 // get node with angle of 60 degrees or greater
2028 map< double, int >::iterator angle_id = angle2ID.lower_bound( 60. * M_PI / 180. );
2029 if ( angle_id == angle2ID.end() ) angle_id = --angle2ID.end();
2030 const double minAngle = 30. * M_PI / 180.;
2031 const double angle = angle_id->first;
2032 bool angleOK = ( angle > minAngle );
2034 // find points to create a triangle
2035 netgen::Element2d tri(3);
2037 tri[0] = vData.ngId;
2038 tri[1] = vData.ngIdCloseN; // to use the closest nodes
2039 tri[2] = angle_id->second; // to use the node with best angle
2041 // decide whether to use the closest node and the node with best angle or to create new ones
2042 for ( int isBestAngleN = 0; isBestAngleN < 2; ++isBestAngleN )
2044 bool createNew = !angleOK; //, distOK = true;
2046 int triInd = isBestAngleN ? 2 : 1;
2047 mp[isBestAngleN] = ngMesh.Point( tri[triInd] );
2052 double distN2 = sqrt( dist2( mpV, mp[isBestAngleN]));
2053 createNew = ( fabs( distN2 - distN1 ) > 0.25 * distN1 );
2055 else if ( angle < tol )
2057 v2p1.SetX( v2p1.X() + 1e-3 );
2063 double segLenHint = ngMesh.GetH( ngMesh.Point( vData.ngId ));
2064 bool avgLenOK = ( avgSegLen < 0.75 * distN1 );
2065 bool hintLenOK = ( segLenHint < 0.75 * distN1 );
2066 createNew = (createNew || avgLenOK || hintLenOK );
2067 // we create a new node not closer than 0.5 to the closest face
2068 // in order not to clash with other close face
2069 double r = min( 0.5, ( hintLenOK ? segLenHint : avgSegLen ) / distN1 );
2070 distFromV = r * distN1;
2074 // create a new point, between the node and the vertex if angleOK
2075 gp_XYZ p( NGPOINT_COORDS( mp[isBestAngleN] ));
2076 gp_Vec v2p( pV, p ); v2p.Normalize();
2077 if ( isBestAngleN && !angleOK )
2078 p = p1 + gp_Dir( v2p.XYZ() - v2p1.XYZ()).XYZ() * distN1 * 0.95;
2080 p = pV + v2p.XYZ() * distFromV;
2082 if ( !isBestAngleN ) p1 = p, distN1 = distFromV;
2084 mp[isBestAngleN].SetPoint( netgen::Point<3> (p.X(), p.Y(), p.Z()));
2085 ngMesh.AddPoint ( mp[isBestAngleN], 1, netgen::SURFACEPOINT );
2086 tri[triInd] = ngMesh.GetNP();
2087 nodeVec.push_back( helper.AddNode( p.X(), p.Y(), p.Z()) );
2090 ngMesh.AddSurfaceElement (tri);
2091 swap( tri[1], tri[2] );
2092 ngMesh.AddSurfaceElement (tri);
2094 #ifdef DUMP_TRIANGLES_SCRIPT
2095 py << "n1 = m.AddNode( "<< mpV(0)<<", "<< mpV(1)<<", "<< mpV(2)<<") "<< endl
2096 << "n2 = m.AddNode( "<< mp[0](0)<<", "<< mp[0](1)<<", "<< mp[0](2)<<") "<< endl
2097 << "n3 = m.AddNode( "<< mp[1](0)<<", "<< mp[1](1)<<", "<< mp[1](2)<<" )" << endl
2098 << "m.AddFace([n1,n2,n3])" << endl;
2100 } // loop on internal vertices of a solid
2102 } // loop on solids with internal vertices
2105 //================================================================================
2107 * \brief Fill netgen mesh with segments of a FACE
2108 * \param ngMesh - netgen mesh
2109 * \param geom - container of OCCT geometry to mesh
2110 * \param wires - data of nodes on FACE boundary
2111 * \param helper - mesher helper holding the FACE
2112 * \param nodeVec - vector of nodes in which node index == netgen ID
2113 * \retval SMESH_ComputeErrorPtr - error description
2115 //================================================================================
2117 SMESH_ComputeErrorPtr
2118 NETGENPlugin_Mesher::AddSegmentsToMesh(netgen::Mesh& ngMesh,
2119 netgen::OCCGeometry& geom,
2120 const TSideVector& wires,
2121 SMESH_MesherHelper& helper,
2122 vector< const SMDS_MeshNode* > & nodeVec,
2123 const bool overrideMinH)
2125 // ----------------------------
2126 // Check wires and count nodes
2127 // ----------------------------
2129 for ( size_t iW = 0; iW < wires.size(); ++iW )
2131 StdMeshers_FaceSidePtr wire = wires[ iW ];
2132 if ( wire->MissVertexNode() )
2134 // Commented for issue 0020960. It worked for the case, let's wait for case where it doesn't.
2135 // It seems that there is no reason for this limitation
2137 // (new SMESH_ComputeError(COMPERR_BAD_INPUT_MESH, "Missing nodes on vertices"));
2139 const vector<UVPtStruct>& uvPtVec = wire->GetUVPtStruct();
2140 if ((int) uvPtVec.size() != wire->NbPoints() )
2141 return SMESH_ComputeError::New(COMPERR_BAD_INPUT_MESH,
2142 SMESH_Comment("Unexpected nb of points on wire ") << iW
2143 << ": " << uvPtVec.size()<<" != "<<wire->NbPoints());
2144 nbNodes += wire->NbPoints();
2146 nodeVec.reserve( nodeVec.size() + nbNodes + 1 );
2147 if ( nodeVec.empty() )
2148 nodeVec.push_back( 0 );
2150 // -----------------
2152 // -----------------
2154 const bool wasNgMeshEmpty = ( ngMesh.GetNP() < 1 ); /* true => this method is called by
2155 NETGENPlugin_NETGEN_2D_ONLY */
2157 // map for nodes on vertices since they can be shared between wires
2158 // ( issue 0020676, face_int_box.brep) and nodes built by NETGEN
2159 map<const SMDS_MeshNode*, int > node2ngID;
2160 if ( !wasNgMeshEmpty ) // fill node2ngID with nodes built by NETGEN
2162 set< int > subIDs; // ids of sub-shapes of the FACE
2163 for ( size_t iW = 0; iW < wires.size(); ++iW )
2165 StdMeshers_FaceSidePtr wire = wires[ iW ];
2166 for ( int iE = 0, nbE = wire->NbEdges(); iE < nbE; ++iE )
2168 subIDs.insert( wire->EdgeID( iE ));
2169 subIDs.insert( helper.GetMeshDS()->ShapeToIndex( wire->FirstVertex( iE )));
2172 for ( size_t ngID = 1; ngID < nodeVec.size(); ++ngID )
2173 if ( subIDs.count( nodeVec[ngID]->getshapeId() ))
2174 node2ngID.insert( make_pair( nodeVec[ngID], ngID ));
2177 const int solidID = 0, faceID = geom.fmap.FindIndex( helper.GetSubShape() );
2178 if ( ngMesh.GetNFD() < 1 )
2179 ngMesh.AddFaceDescriptor( netgen::FaceDescriptor( faceID, solidID, solidID, 0 ));
2181 for ( size_t iW = 0; iW < wires.size(); ++iW )
2183 StdMeshers_FaceSidePtr wire = wires[ iW ];
2184 const vector<UVPtStruct>& uvPtVec = wire->GetUVPtStruct();
2185 const int nbSegments = wire->NbPoints() - 1;
2187 // assure the 1st node to be in node2ngID, which is needed to correctly
2188 // "close chain of segments" (see below) in case if the 1st node is not
2189 // onVertex because it is on a Viscous layer
2190 node2ngID.insert( make_pair( uvPtVec[ 0 ].node, ngMesh.GetNP() + 1 ));
2192 // compute length of every segment
2193 vector<double> segLen( nbSegments );
2194 for ( int i = 0; i < nbSegments; ++i )
2195 segLen[i] = SMESH_TNodeXYZ( uvPtVec[ i ].node ).Distance( uvPtVec[ i+1 ].node );
2197 int edgeID = 1, posID = -2;
2198 bool isInternalWire = false;
2199 double vertexNormPar = 0;
2200 const int prevNbNGSeg = ngMesh.GetNSeg();
2201 for ( int i = 0; i < nbSegments; ++i ) // loop on segments
2203 // Add the first point of a segment
2205 const SMDS_MeshNode * n = uvPtVec[ i ].node;
2206 const int posShapeID = n->getshapeId();
2207 bool onVertex = ( n->GetPosition()->GetTypeOfPosition() == SMDS_TOP_VERTEX );
2208 bool onEdge = ( n->GetPosition()->GetTypeOfPosition() == SMDS_TOP_EDGE );
2210 // skip nodes on degenerated edges
2211 if ( helper.IsDegenShape( posShapeID ) &&
2212 helper.IsDegenShape( uvPtVec[ i+1 ].node->getshapeId() ))
2215 int ngID1 = ngMesh.GetNP() + 1, ngID2 = ngID1+1;
2216 if ( onVertex || ( !wasNgMeshEmpty && onEdge ) || helper.IsRealSeam( posShapeID ))
2217 ngID1 = node2ngID.insert( make_pair( n, ngID1 )).first->second;
2218 if ( ngID1 > ngMesh.GetNP() )
2220 netgen::MeshPoint mp( netgen::Point<3> (n->X(), n->Y(), n->Z()) );
2221 ngMesh.AddPoint ( mp, 1, netgen::EDGEPOINT );
2222 nodeVec.push_back( n );
2224 else // n is in ngMesh already, and ngID2 in prev segment is wrong
2226 ngID2 = ngMesh.GetNP() + 1;
2227 if ( i > 0 ) // prev segment belongs to same wire
2229 netgen::Segment& prevSeg = ngMesh.LineSegment( ngMesh.GetNSeg() );
2236 netgen::Segment seg;
2238 seg[0] = ngID1; // ng node id
2239 seg[1] = ngID2; // ng node id
2240 seg.edgenr = ngMesh.GetNSeg() + 1; // ng segment id
2241 seg.si = faceID; // = geom.fmap.FindIndex (face);
2243 for ( int iEnd = 0; iEnd < 2; ++iEnd)
2245 const UVPtStruct& pnt = uvPtVec[ i + iEnd ];
2247 seg.epgeominfo[ iEnd ].dist = pnt.param; // param on curve
2248 seg.epgeominfo[ iEnd ].u = pnt.u;
2249 seg.epgeominfo[ iEnd ].v = pnt.v;
2251 // find out edge id and node parameter on edge
2252 onVertex = ( pnt.normParam + 1e-10 > vertexNormPar );
2253 if ( onVertex || posShapeID != posID )
2256 double normParam = pnt.normParam;
2258 normParam = 0.5 * ( uvPtVec[ i ].normParam + uvPtVec[ i+1 ].normParam );
2259 int edgeIndexInWire = wire->EdgeIndex( normParam );
2260 vertexNormPar = wire->LastParameter( edgeIndexInWire );
2261 const TopoDS_Edge& edge = wire->Edge( edgeIndexInWire );
2262 edgeID = geom.emap.FindIndex( edge );
2264 isInternalWire = ( edge.Orientation() == TopAbs_INTERNAL );
2265 // if ( onVertex ) // param on curve is different on each of two edges
2266 // seg.epgeominfo[ iEnd ].dist = helper.GetNodeU( edge, pnt.node );
2268 seg.epgeominfo[ iEnd ].edgenr = edgeID; // = geom.emap.FindIndex(edge);
2271 ngMesh.AddSegment (seg);
2273 // restrict size of elements near the segment
2274 SMESH_TNodeXYZ np1( n ), np2( uvPtVec[ i+1 ].node );
2275 // get an average size of adjacent segments to avoid sharp change of
2276 // element size (regression on issue 0020452, note 0010898)
2277 int iPrev = SMESH_MesherHelper::WrapIndex( i-1, nbSegments );
2278 int iNext = SMESH_MesherHelper::WrapIndex( i+1, nbSegments );
2279 double sumH = segLen[ iPrev ] + segLen[ i ] + segLen[ iNext ];
2280 int nbSeg = ( int( segLen[ iPrev ] > sumH / 100.) +
2281 int( segLen[ i ] > sumH / 100.) +
2282 int( segLen[ iNext ] > sumH / 100.));
2284 RestrictLocalSize( ngMesh, 0.5*(np1+np2), sumH / nbSeg, overrideMinH );
2286 if ( isInternalWire )
2288 swap (seg[0], seg[1]);
2289 swap( seg.epgeominfo[0], seg.epgeominfo[1] );
2290 seg.edgenr = ngMesh.GetNSeg() + 1; // segment id
2291 ngMesh.AddSegment (seg);
2293 } // loop on segments on a wire
2295 // close chain of segments
2296 if ( nbSegments > 0 )
2298 netgen::Segment& lastSeg = ngMesh.LineSegment( ngMesh.GetNSeg() - int( isInternalWire ));
2299 const SMDS_MeshNode * lastNode = uvPtVec.back().node;
2300 lastSeg[1] = node2ngID.insert( make_pair( lastNode, lastSeg[1] )).first->second;
2301 if ( lastSeg[1] > ngMesh.GetNP() )
2303 netgen::MeshPoint mp( netgen::Point<3> (lastNode->X(), lastNode->Y(), lastNode->Z()) );
2304 ngMesh.AddPoint ( mp, 1, netgen::EDGEPOINT );
2305 nodeVec.push_back( lastNode );
2307 if ( isInternalWire )
2309 netgen::Segment& realLastSeg = ngMesh.LineSegment( ngMesh.GetNSeg() );
2310 realLastSeg[0] = lastSeg[1];
2314 #ifdef DUMP_SEGMENTS
2315 cout << "BEGIN WIRE " << iW << endl;
2316 for ( int i = prevNbNGSeg+1; i <= ngMesh.GetNSeg(); ++i )
2318 netgen::Segment& seg = ngMesh.LineSegment( i );
2320 netgen::Segment& prevSeg = ngMesh.LineSegment( i-1 );
2321 if ( seg[0] == prevSeg[1] && seg[1] == prevSeg[0] )
2323 cout << "Segment: " << seg.edgenr << endl << "\tis REVERSE of the previous one" << endl;
2327 cout << "Segment: " << seg.edgenr << endl
2328 << "\tp1: " << seg[0] << " n" << nodeVec[ seg[0]]->GetID() << endl
2329 << "\tp2: " << seg[1] << " n" << nodeVec[ seg[1]]->GetID() << endl
2330 << "\tp0 param: " << seg.epgeominfo[ 0 ].dist << endl
2331 << "\tp0 uv: " << seg.epgeominfo[ 0 ].u <<", "<< seg.epgeominfo[ 0 ].v << endl
2332 << "\tp0 edge: " << seg.epgeominfo[ 0 ].edgenr << endl
2333 << "\tp1 param: " << seg.epgeominfo[ 1 ].dist << endl
2334 << "\tp1 uv: " << seg.epgeominfo[ 1 ].u <<", "<< seg.epgeominfo[ 1 ].v << endl
2335 << "\tp1 edge: " << seg.epgeominfo[ 1 ].edgenr << endl;
2337 cout << "--END WIRE " << iW << endl;
2339 SMESH_Comment __not_unused_variable( prevNbNGSeg );
2342 } // loop on WIREs of a FACE
2344 // add a segment instead of an internal vertex
2345 if ( wasNgMeshEmpty )
2347 NETGENPlugin_Internals intShapes( *helper.GetMesh(), helper.GetSubShape(), /*is3D=*/false );
2348 AddIntVerticesInFaces( geom, ngMesh, nodeVec, intShapes );
2350 ngMesh.CalcSurfacesOfNode();
2355 //================================================================================
2357 * \brief Fill SMESH mesh according to contents of netgen mesh
2358 * \param occgeo - container of OCCT geometry to mesh
2359 * \param ngMesh - netgen mesh
2360 * \param initState - bn of entities in netgen mesh before computing
2361 * \param sMesh - SMESH mesh to fill in
2362 * \param nodeVec - vector of nodes in which node index == netgen ID
2363 * \param comment - returns problem description
2364 * \param quadHelper - holder of medium nodes of sub-meshes
2365 * \retval int - error
2367 //================================================================================
2369 int NETGENPlugin_Mesher::FillSMesh(const netgen::OCCGeometry& occgeo,
2370 netgen::Mesh& ngMesh,
2371 const NETGENPlugin_ngMeshInfo& initState,
2373 std::vector<const SMDS_MeshNode*>& nodeVec,
2374 SMESH_Comment& comment,
2375 SMESH_MesherHelper* quadHelper)
2377 int nbNod = ngMesh.GetNP();
2378 int nbSeg = ngMesh.GetNSeg();
2379 int nbFac = ngMesh.GetNSE();
2380 int nbVol = ngMesh.GetNE();
2382 SMESHDS_Mesh* meshDS = sMesh.GetMeshDS();
2384 // quadHelper is used for either
2385 // 1) making quadratic elements when a lower dimension mesh is loaded
2386 // to SMESH before conversion to quadratic by NETGEN
2387 // 2) sewing of quadratic elements with quadratic elements of sub-meshes
2388 if ( quadHelper && !quadHelper->GetIsQuadratic() && quadHelper->GetTLinkNodeMap().empty() )
2391 int i, nbInitNod = initState._nbNodes;
2392 if ( initState._elementsRemoved )
2394 // PAL23427. Update nodeVec to track removal of netgen free points as a result
2395 // of removal of faces in FillNgMesh() in the case of a shrunk sub-mesh
2396 int ngID, nodeVecSize = nodeVec.size();
2397 const double eps = std::numeric_limits<double>::min();
2398 for ( ngID = i = 1; i < nodeVecSize; ++ngID, ++i )
2400 gp_Pnt ngPnt( NGPOINT_COORDS( ngMesh.Point( ngID )));
2401 gp_Pnt node ( SMESH_NodeXYZ (nodeVec_ACCESS(i) ));
2402 if ( ngPnt.SquareDistance( node ) < eps )
2404 nodeVec[ ngID ] = nodeVec[ i ];
2411 nodeVec.resize( ngID );
2412 nbInitNod = ngID - 1;
2414 // -------------------------------------
2415 // Create and insert nodes into nodeVec
2416 // -------------------------------------
2418 nodeVec.resize( nbNod + 1 );
2419 for ( i = nbInitNod+1; i <= nbNod; ++i )
2421 const netgen::MeshPoint& ngPoint = ngMesh.Point(i);
2422 SMDS_MeshNode* node = NULL;
2423 TopoDS_Vertex aVert;
2424 // First, netgen creates nodes on vertices in occgeo.vmap,
2425 // so node index corresponds to vertex index
2426 // but (issue 0020776) netgen does not create nodes with equal coordinates
2427 if ( i-nbInitNod <= occgeo.vmap.Extent() )
2429 gp_Pnt p ( NGPOINT_COORDS(ngPoint) );
2430 for (int iV = i-nbInitNod; aVert.IsNull() && iV <= occgeo.vmap.Extent(); ++iV)
2432 aVert = TopoDS::Vertex( occgeo.vmap( iV ));
2433 gp_Pnt pV = BRep_Tool::Pnt( aVert );
2434 if ( p.SquareDistance( pV ) > 1e-20 )
2437 node = const_cast<SMDS_MeshNode*>( SMESH_Algo::VertexNode( aVert, meshDS ));
2440 if (!node) // node not found on vertex
2442 node = meshDS->AddNode( NGPOINT_COORDS( ngPoint ));
2443 if (!aVert.IsNull())
2444 meshDS->SetNodeOnVertex(node, aVert);
2449 // -------------------------------------------
2450 // Create mesh segments along geometric edges
2451 // -------------------------------------------
2453 int nbInitSeg = initState._nbSegments;
2454 for (i = nbInitSeg+1; i <= nbSeg; ++i )
2456 const netgen::Segment& seg = ngMesh.LineSegment(i);
2458 int pinds[3] = { seg.pnums[0], seg.pnums[1], seg.pnums[2] };
2461 for (int j=0; j < 3; ++j)
2463 int pind = pinds[j];
2464 if (pind <= 0 || !nodeVec_ACCESS(pind))
2472 int aGeomEdgeInd = seg.epgeominfo[j].edgenr;
2473 if (aGeomEdgeInd > 0 && aGeomEdgeInd <= occgeo.emap.Extent())
2474 aEdge = TopoDS::Edge(occgeo.emap(aGeomEdgeInd));
2476 param = seg.epgeominfo[j].dist;
2479 else // middle point
2481 param = param2 * 0.5;
2483 if (!aEdge.IsNull() && nodeVec_ACCESS(pind)->getshapeId() < 1)
2485 meshDS->SetNodeOnEdge(nodeVec_ACCESS(pind), aEdge, param);
2490 SMDS_MeshEdge* edge = 0;
2491 if (nbp == 2) // second order ?
2493 if ( meshDS->FindEdge( nodeVec_ACCESS(pinds[0]), nodeVec_ACCESS(pinds[1])))
2495 if ( quadHelper ) // final mesh must be quadratic
2496 edge = quadHelper->AddEdge(nodeVec_ACCESS(pinds[0]), nodeVec_ACCESS(pinds[1]));
2498 edge = meshDS->AddEdge(nodeVec_ACCESS(pinds[0]), nodeVec_ACCESS(pinds[1]));
2502 if ( meshDS->FindEdge( nodeVec_ACCESS(pinds[0]), nodeVec_ACCESS(pinds[1]),
2503 nodeVec_ACCESS(pinds[2])))
2505 edge = meshDS->AddEdge(nodeVec_ACCESS(pinds[0]), nodeVec_ACCESS(pinds[1]),
2506 nodeVec_ACCESS(pinds[2]));
2510 if ( comment.empty() ) comment << "Cannot create a mesh edge";
2511 MESSAGE("Cannot create a mesh edge");
2512 nbSeg = nbFac = nbVol = 0;
2515 if ( !aEdge.IsNull() && edge->getshapeId() < 1 )
2516 meshDS->SetMeshElementOnShape(edge, aEdge);
2518 else if ( comment.empty() )
2520 comment << "Invalid netgen segment #" << i;
2524 // ----------------------------------------
2525 // Create mesh faces along geometric faces
2526 // ----------------------------------------
2528 int nbInitFac = initState._nbFaces;
2529 int quadFaceID = ngMesh.GetNFD() + 1;
2530 if ( nbInitFac < nbFac )
2531 // add a faces descriptor to exclude qudrangle elements generated by NETGEN
2532 // from computation of 3D mesh
2533 ngMesh.AddFaceDescriptor (netgen::FaceDescriptor(quadFaceID, /*solid1=*/0, /*solid2=*/0, 0));
2535 vector<const SMDS_MeshNode*> nodes;
2536 for (i = nbInitFac+1; i <= nbFac; ++i )
2538 const netgen::Element2d& elem = ngMesh.SurfaceElement(i);
2539 const int aGeomFaceInd = elem.GetIndex();
2541 if (aGeomFaceInd > 0 && aGeomFaceInd <= occgeo.fmap.Extent())
2542 aFace = TopoDS::Face(occgeo.fmap(aGeomFaceInd));
2544 for ( int j = 1; j <= elem.GetNP(); ++j )
2546 int pind = elem.PNum(j);
2547 if ( pind < 1 || pind >= (int) nodeVec.size() )
2549 if ( SMDS_MeshNode* node = nodeVec_ACCESS(pind))
2551 nodes.push_back( node );
2552 if (!aFace.IsNull() && node->getshapeId() < 1)
2554 const netgen::PointGeomInfo& pgi = elem.GeomInfoPi(j);
2555 meshDS->SetNodeOnFace(node, aFace, pgi.u, pgi.v);
2559 if ((int) nodes.size() != elem.GetNP() )
2561 if ( comment.empty() )
2562 comment << "Invalid netgen 2d element #" << i;
2563 continue; // bad node ids
2565 SMDS_MeshFace* face = NULL;
2566 switch (elem.GetType())
2569 if ( quadHelper ) // final mesh must be quadratic
2570 face = quadHelper->AddFace(nodes[0],nodes[1],nodes[2]);
2572 face = meshDS->AddFace(nodes[0],nodes[1],nodes[2]);
2575 if ( quadHelper ) // final mesh must be quadratic
2576 face = quadHelper->AddFace(nodes[0],nodes[1],nodes[2],nodes[3]);
2578 face = meshDS->AddFace(nodes[0],nodes[1],nodes[2],nodes[3]);
2579 // exclude qudrangle elements from computation of 3D mesh
2580 const_cast< netgen::Element2d& >( elem ).SetIndex( quadFaceID );
2583 nodes[5] = mediumNode( nodes[0],nodes[1],nodes[5], quadHelper );
2584 nodes[3] = mediumNode( nodes[1],nodes[2],nodes[3], quadHelper );
2585 nodes[4] = mediumNode( nodes[2],nodes[0],nodes[4], quadHelper );
2586 face = meshDS->AddFace(nodes[0],nodes[1],nodes[2],nodes[5],nodes[3],nodes[4]);
2589 nodes[4] = mediumNode( nodes[0],nodes[1],nodes[4], quadHelper );
2590 nodes[7] = mediumNode( nodes[1],nodes[2],nodes[7], quadHelper );
2591 nodes[5] = mediumNode( nodes[2],nodes[3],nodes[5], quadHelper );
2592 nodes[6] = mediumNode( nodes[3],nodes[0],nodes[6], quadHelper );
2593 face = meshDS->AddFace(nodes[0],nodes[1],nodes[2],nodes[3],
2594 nodes[4],nodes[7],nodes[5],nodes[6]);
2595 // exclude qudrangle elements from computation of 3D mesh
2596 const_cast< netgen::Element2d& >( elem ).SetIndex( quadFaceID );
2599 MESSAGE("NETGEN created a face of unexpected type, ignoring");
2604 if ( comment.empty() ) comment << "Cannot create a mesh face";
2605 MESSAGE("Cannot create a mesh face");
2606 nbSeg = nbFac = nbVol = 0;
2609 if ( !aFace.IsNull() )
2610 meshDS->SetMeshElementOnShape( face, aFace );
2613 // ------------------
2614 // Create tetrahedra
2615 // ------------------
2617 for ( i = 1; i <= nbVol; ++i )
2619 const netgen::Element& elem = ngMesh.VolumeElement(i);
2620 int aSolidInd = elem.GetIndex();
2621 TopoDS_Solid aSolid;
2622 if ( aSolidInd > 0 && aSolidInd <= occgeo.somap.Extent() )
2623 aSolid = TopoDS::Solid(occgeo.somap(aSolidInd));
2625 for ( int j = 1; j <= elem.GetNP(); ++j )
2627 int pind = elem.PNum(j);
2628 if ( pind < 1 || pind >= (int)nodeVec.size() )
2630 if ( SMDS_MeshNode* node = nodeVec_ACCESS(pind) )
2632 nodes.push_back(node);
2633 if ( !aSolid.IsNull() && node->getshapeId() < 1 )
2634 meshDS->SetNodeInVolume(node, aSolid);
2637 if ((int) nodes.size() != elem.GetNP() )
2639 if ( comment.empty() )
2640 comment << "Invalid netgen 3d element #" << i;
2643 SMDS_MeshVolume* vol = NULL;
2644 switch ( elem.GetType() )
2647 vol = meshDS->AddVolume(nodes[0],nodes[1],nodes[2],nodes[3]);
2650 nodes[4] = mediumNode( nodes[0],nodes[1],nodes[4], quadHelper );
2651 nodes[7] = mediumNode( nodes[1],nodes[2],nodes[7], quadHelper );
2652 nodes[5] = mediumNode( nodes[2],nodes[0],nodes[5], quadHelper );
2653 nodes[6] = mediumNode( nodes[0],nodes[3],nodes[6], quadHelper );
2654 nodes[8] = mediumNode( nodes[1],nodes[3],nodes[8], quadHelper );
2655 nodes[9] = mediumNode( nodes[2],nodes[3],nodes[9], quadHelper );
2656 vol = meshDS->AddVolume(nodes[0],nodes[1],nodes[2],nodes[3],
2657 nodes[4],nodes[7],nodes[5],nodes[6],nodes[8],nodes[9]);
2660 MESSAGE("NETGEN created a volume of unexpected type, ignoring");
2665 if ( comment.empty() ) comment << "Cannot create a mesh volume";
2666 MESSAGE("Cannot create a mesh volume");
2667 nbSeg = nbFac = nbVol = 0;
2670 if (!aSolid.IsNull())
2671 meshDS->SetMeshElementOnShape(vol, aSolid);
2673 return comment.empty() ? 0 : 1;
2678 //================================================================================
2680 * \brief Convert error into text
2682 //================================================================================
2684 std::string text(int err)
2689 SMESH_Comment("Error in netgen::OCCGenerateMesh() at ") << netgen::multithread.task;
2692 //================================================================================
2694 * \brief Convert exception into text
2696 //================================================================================
2698 std::string text(Standard_Failure& ex)
2700 SMESH_Comment str("Exception in netgen::OCCGenerateMesh()");
2701 str << " at " << netgen::multithread.task
2702 << ": " << ex.DynamicType()->Name();
2703 if ( ex.GetMessageString() && strlen( ex.GetMessageString() ))
2704 str << ": " << ex.GetMessageString();
2707 //================================================================================
2709 * \brief Convert exception into text
2711 //================================================================================
2713 std::string text(netgen::NgException& ex)
2715 SMESH_Comment str("NgException");
2716 if ( strlen( netgen::multithread.task ) > 0 )
2717 str << " at " << netgen::multithread.task;
2718 str << ": " << ex.What();
2722 //================================================================================
2724 * \brief Looks for triangles lying on a SOLID
2726 //================================================================================
2728 bool hasBadElemOnSolid( const list<const SMDS_MeshElement*>& elems,
2729 SMESH_subMesh* solidSM )
2731 TopTools_IndexedMapOfShape solidSubs;
2732 TopExp::MapShapes( solidSM->GetSubShape(), solidSubs );
2733 SMESHDS_Mesh* mesh = solidSM->GetFather()->GetMeshDS();
2735 list<const SMDS_MeshElement*>::const_iterator e = elems.begin();
2736 for ( ; e != elems.end(); ++e )
2738 const SMDS_MeshElement* elem = *e;
2739 // if ( elem->GetType() != SMDSAbs_Face ) -- 23047
2741 int nbNodesOnSolid = 0, nbNodes = elem->NbNodes();
2742 SMDS_NodeIteratorPtr nIt = elem->nodeIterator();
2743 while ( nIt->more() )
2745 const SMDS_MeshNode* n = nIt->next();
2746 const TopoDS_Shape& s = mesh->IndexToShape( n->getshapeId() );
2747 nbNodesOnSolid += ( !s.IsNull() && solidSubs.Contains( s ));
2748 if ( nbNodesOnSolid > 2 ||
2749 nbNodesOnSolid == nbNodes)
2756 const double edgeMeshingTime = 0.001;
2757 const double faceMeshingTime = 0.019;
2758 const double edgeFaceMeshingTime = edgeMeshingTime + faceMeshingTime;
2759 const double faceOptimizTime = 0.06;
2760 const double voluMeshingTime = 0.15;
2761 const double volOptimizeTime = 0.77;
2764 //=============================================================================
2766 * Here we are going to use the NETGEN mesher
2768 //=============================================================================
2770 bool NETGENPlugin_Mesher::Compute()
2772 NETGENPlugin_NetgenLibWrapper ngLib;
2774 netgen::MeshingParameters& mparams = netgen::mparam;
2776 SMESH_ComputeErrorPtr error = SMESH_ComputeError::New();
2777 SMESH_MesherHelper quadHelper( *_mesh );
2778 quadHelper.SetIsQuadratic( mparams.secondorder );
2780 // -------------------------
2781 // Prepare OCC geometry
2782 // -------------------------
2784 netgen::OCCGeometry occgeo;
2785 list< SMESH_subMesh* > meshedSM[3]; // for 0-2 dimensions
2786 NETGENPlugin_Internals internals( *_mesh, _shape, _isVolume );
2787 PrepareOCCgeometry( occgeo, _shape, *_mesh, meshedSM, &internals );
2790 _totalTime = edgeFaceMeshingTime;
2792 _totalTime += faceOptimizTime;
2794 _totalTime += voluMeshingTime + ( _optimize ? volOptimizeTime : 0 );
2795 double doneTime = 0;
2798 _curShapeIndex = -1;
2800 // -------------------------
2801 // Generate the mesh
2802 // -------------------------
2805 NETGENPlugin_ngMeshInfo initState; // it remembers size of ng mesh equal to size of Smesh
2807 SMESH_Comment comment;
2810 // vector of nodes in which node index == netgen ID
2811 vector< const SMDS_MeshNode* > nodeVec;
2819 // not to RestrictLocalH() according to curvature during MESHCONST_ANALYSE
2820 mparams.uselocalh = false;
2821 mparams.grading = 0.8; // not limitited size growth
2823 if ( _simpleHyp->GetNumberOfSegments() )
2825 mparams.maxh = occgeo.boundingbox.Diam();
2828 mparams.maxh = _simpleHyp->GetLocalLength();
2831 if ( mparams.maxh == 0.0 )
2832 mparams.maxh = occgeo.boundingbox.Diam();
2833 if ( _simpleHyp || ( mparams.minh == 0.0 && _fineness != NETGENPlugin_Hypothesis::UserDefined))
2834 mparams.minh = GetDefaultMinSize( _shape, mparams.maxh );
2836 // Local size on faces
2837 occgeo.face_maxh = mparams.maxh;
2839 // Let netgen create _ngMesh and calculate element size on not meshed shapes
2843 int startWith = netgen::MESHCONST_ANALYSE;
2844 int endWith = netgen::MESHCONST_ANALYSE;
2849 err = netgen::OCCGenerateMesh(occgeo, _ngMesh, mparams, startWith, endWith);
2851 err = netgen::OCCGenerateMesh(occgeo, _ngMesh, startWith, endWith, optstr);
2853 if(netgen::multithread.terminate)
2856 comment << text(err);
2858 catch (Standard_Failure& ex)
2860 comment << text(ex);
2862 catch (netgen::NgException & ex)
2864 comment << text(ex);
2865 if ( mparams.meshsizefilename )
2866 throw SMESH_ComputeError(COMPERR_BAD_PARMETERS, comment );
2868 err = 0; //- MESHCONST_ANALYSE isn't so important step
2871 ngLib.setMesh(( Ng_Mesh*) _ngMesh );
2873 _ngMesh->ClearFaceDescriptors(); // we make descriptors our-self
2875 if ( !mparams.uselocalh ) // mparams.grading is not taken into account yet
2876 _ngMesh->LocalHFunction().SetGrading( mparams.grading );
2880 // Pass 1D simple parameters to NETGEN
2881 // --------------------------------
2882 int nbSeg = _simpleHyp->GetNumberOfSegments();
2883 double segSize = _simpleHyp->GetLocalLength();
2884 for ( int iE = 1; iE <= occgeo.emap.Extent(); ++iE )
2886 const TopoDS_Edge& e = TopoDS::Edge( occgeo.emap(iE));
2888 segSize = SMESH_Algo::EdgeLength( e ) / ( nbSeg - 0.4 );
2889 setLocalSize( e, segSize, *_ngMesh );
2892 else // if ( ! _simpleHyp )
2894 // Local size on shapes
2895 SetLocalSize( occgeo, *_ngMesh );
2896 SetLocalSizeForChordalError( occgeo, *_ngMesh );
2899 // Precompute internal edges (issue 0020676) in order to
2900 // add mesh on them correctly (twice) to netgen mesh
2901 if ( !err && internals.hasInternalEdges() )
2903 // load internal shapes into OCCGeometry
2904 netgen::OCCGeometry intOccgeo;
2905 internals.getInternalEdges( intOccgeo.fmap, intOccgeo.emap, intOccgeo.vmap, meshedSM );
2906 intOccgeo.boundingbox = occgeo.boundingbox;
2907 intOccgeo.shape = occgeo.shape;
2908 intOccgeo.face_maxh.SetSize(intOccgeo.fmap.Extent());
2909 intOccgeo.face_maxh = netgen::mparam.maxh;
2910 netgen::Mesh *tmpNgMesh = NULL;
2914 // compute local H on internal shapes in the main mesh
2915 //OCCSetLocalMeshSize(intOccgeo, *_ngMesh); it deletes _ngMesh->localH
2917 // let netgen create a temporary mesh
2919 netgen::OCCGenerateMesh(intOccgeo, tmpNgMesh, mparams, startWith, endWith);
2921 netgen::OCCGenerateMesh(intOccgeo, tmpNgMesh, startWith, endWith, optstr);
2923 if(netgen::multithread.terminate)
2926 // copy LocalH from the main to temporary mesh
2927 initState.transferLocalH( _ngMesh, tmpNgMesh );
2929 // compute mesh on internal edges
2930 startWith = endWith = netgen::MESHCONST_MESHEDGES;
2932 err = netgen::OCCGenerateMesh(intOccgeo, tmpNgMesh, mparams, startWith, endWith);
2934 err = netgen::OCCGenerateMesh(intOccgeo, tmpNgMesh, startWith, endWith, optstr);
2936 comment << text(err);
2938 catch (Standard_Failure& ex)
2940 comment << text(ex);
2943 initState.restoreLocalH( tmpNgMesh );
2945 // fill SMESH by netgen mesh
2946 vector< const SMDS_MeshNode* > tmpNodeVec;
2947 FillSMesh( intOccgeo, *tmpNgMesh, initState, *_mesh, tmpNodeVec, comment );
2948 err = ( err || !comment.empty() );
2950 nglib::Ng_DeleteMesh((nglib::Ng_Mesh*)tmpNgMesh);
2953 // Fill _ngMesh with nodes and segments of computed submeshes
2956 err = ! ( FillNgMesh(occgeo, *_ngMesh, nodeVec, meshedSM[ MeshDim_0D ]) &&
2957 FillNgMesh(occgeo, *_ngMesh, nodeVec, meshedSM[ MeshDim_1D ], &quadHelper));
2959 initState = NETGENPlugin_ngMeshInfo(_ngMesh);
2964 startWith = endWith = netgen::MESHCONST_MESHEDGES;
2969 err = netgen::OCCGenerateMesh(occgeo, _ngMesh, mparams, startWith, endWith);
2971 err = netgen::OCCGenerateMesh(occgeo, _ngMesh, startWith, endWith, optstr);
2973 if(netgen::multithread.terminate)
2976 comment << text(err);
2978 catch (Standard_Failure& ex)
2980 comment << text(ex);
2985 _ticTime = ( doneTime += edgeMeshingTime ) / _totalTime / _progressTic;
2987 mparams.uselocalh = true; // restore as it is used at surface optimization
2989 // ---------------------
2990 // compute surface mesh
2991 // ---------------------
2994 // Pass 2D simple parameters to NETGEN
2996 if ( double area = _simpleHyp->GetMaxElementArea() ) {
2998 mparams.maxh = sqrt(2. * area/sqrt(3.0));
2999 mparams.grading = 0.4; // moderate size growth
3002 // length from edges
3003 if ( _ngMesh->GetNSeg() ) {
3004 double edgeLength = 0;
3005 TopTools_MapOfShape visitedEdges;
3006 for ( TopExp_Explorer exp( _shape, TopAbs_EDGE ); exp.More(); exp.Next() )
3007 if( visitedEdges.Add(exp.Current()) )
3008 edgeLength += SMESH_Algo::EdgeLength( TopoDS::Edge( exp.Current() ));
3009 // we have to multiply length by 2 since for each TopoDS_Edge there
3010 // are double set of NETGEN edges, in other words, we have to
3011 // divide _ngMesh->GetNSeg() by 2.
3012 mparams.maxh = 2*edgeLength / _ngMesh->GetNSeg();
3015 mparams.maxh = 1000;
3017 mparams.grading = 0.2; // slow size growth
3019 mparams.quad = _simpleHyp->GetAllowQuadrangles();
3020 mparams.maxh = min( mparams.maxh, occgeo.boundingbox.Diam()/2 );
3021 _ngMesh->SetGlobalH (mparams.maxh);
3022 netgen::Box<3> bb = occgeo.GetBoundingBox();
3023 bb.Increase (bb.Diam()/20);
3024 _ngMesh->SetLocalH (bb.PMin(), bb.PMax(), mparams.grading);
3027 // Care of vertices internal in faces (issue 0020676)
3028 if ( internals.hasInternalVertexInFace() )
3030 // store computed segments in SMESH in order not to create SMESH
3031 // edges for ng segments added by AddIntVerticesInFaces()
3032 FillSMesh( occgeo, *_ngMesh, initState, *_mesh, nodeVec, comment );
3033 // add segments to faces with internal vertices
3034 AddIntVerticesInFaces( occgeo, *_ngMesh, nodeVec, internals );
3035 initState = NETGENPlugin_ngMeshInfo(_ngMesh);
3038 // Build viscous layers
3039 if (( _isViscousLayers2D ) ||
3040 ( !occgeo.fmap.IsEmpty() &&
3041 StdMeshers_ViscousLayers2D::HasProxyMesh( TopoDS::Face( occgeo.fmap(1) ), *_mesh )))
3043 if ( !internals.hasInternalVertexInFace() ) {
3044 FillSMesh( occgeo, *_ngMesh, initState, *_mesh, nodeVec, comment );
3045 initState = NETGENPlugin_ngMeshInfo(_ngMesh);
3047 SMESH_ProxyMesh::Ptr viscousMesh;
3048 SMESH_MesherHelper helper( *_mesh );
3049 for ( int faceID = 1; faceID <= occgeo.fmap.Extent(); ++faceID )
3051 const TopoDS_Face& F = TopoDS::Face( occgeo.fmap( faceID ));
3052 viscousMesh = StdMeshers_ViscousLayers2D::Compute( *_mesh, F );
3055 if ( viscousMesh->NbProxySubMeshes() == 0 )
3057 // exclude from computation ng segments built on EDGEs of F
3058 for (int i = 1; i <= _ngMesh->GetNSeg(); i++)
3060 netgen::Segment & seg = _ngMesh->LineSegment(i);
3061 if (seg.si == faceID)
3064 // add new segments to _ngMesh instead of excluded ones
3065 helper.SetSubShape( F );
3067 StdMeshers_FaceSide::GetFaceWires( F, *_mesh, /*skipMediumNodes=*/true,
3068 error, &helper, viscousMesh );
3069 error = AddSegmentsToMesh( *_ngMesh, occgeo, wires, helper, nodeVec );
3071 if ( !error ) error = SMESH_ComputeError::New();
3073 initState = NETGENPlugin_ngMeshInfo(_ngMesh);
3076 // Let netgen compute 2D mesh
3077 startWith = netgen::MESHCONST_MESHSURFACE;
3078 endWith = _optimize ? netgen::MESHCONST_OPTSURFACE : netgen::MESHCONST_MESHSURFACE;
3083 err = netgen::OCCGenerateMesh(occgeo, _ngMesh, mparams, startWith, endWith);
3085 err = netgen::OCCGenerateMesh(occgeo, _ngMesh, startWith, endWith, optstr);
3087 if(netgen::multithread.terminate)
3090 comment << text (err);
3092 catch (Standard_Failure& ex)
3094 comment << text(ex);
3095 //err = 1; -- try to make volumes anyway
3097 catch (netgen::NgException exc)
3099 comment << text(exc);
3100 //err = 1; -- try to make volumes anyway
3105 doneTime += faceMeshingTime + ( _optimize ? faceOptimizTime : 0 );
3106 _ticTime = doneTime / _totalTime / _progressTic;
3108 // ---------------------
3109 // generate volume mesh
3110 // ---------------------
3111 // Fill _ngMesh with nodes and faces of computed 2D submeshes
3112 if ( !err && _isVolume &&
3113 ( !meshedSM[ MeshDim_2D ].empty() || mparams.quad || _viscousLayersHyp ))
3115 // load SMESH with computed segments and faces
3116 FillSMesh( occgeo, *_ngMesh, initState, *_mesh, nodeVec, comment, &quadHelper );
3118 // compute prismatic boundary volumes
3119 int nbQuad = _mesh->NbQuadrangles();
3120 SMESH_ProxyMesh::Ptr viscousMesh;
3121 if ( _viscousLayersHyp )
3123 viscousMesh = _viscousLayersHyp->Compute( *_mesh, _shape );
3127 // compute pyramids on quadrangles
3128 vector<SMESH_ProxyMesh::Ptr> pyramidMeshes( occgeo.somap.Extent() );
3130 for ( int iS = 1; iS <= occgeo.somap.Extent(); ++iS )
3132 StdMeshers_QuadToTriaAdaptor* adaptor = new StdMeshers_QuadToTriaAdaptor;
3133 pyramidMeshes[ iS-1 ].reset( adaptor );
3134 bool ok = adaptor->Compute( *_mesh, occgeo.somap(iS), viscousMesh.get() );
3138 // add proxy faces to NG mesh
3139 list< SMESH_subMesh* > viscousSM;
3140 for ( int iS = 1; iS <= occgeo.somap.Extent(); ++iS )
3142 list< SMESH_subMesh* > quadFaceSM;
3143 for (TopExp_Explorer face(occgeo.somap(iS), TopAbs_FACE); face.More(); face.Next())
3144 if ( pyramidMeshes[iS-1] && pyramidMeshes[iS-1]->GetProxySubMesh( face.Current() ))
3146 quadFaceSM.push_back( _mesh->GetSubMesh( face.Current() ));
3147 meshedSM[ MeshDim_2D ].remove( quadFaceSM.back() );
3149 else if ( viscousMesh && viscousMesh->GetProxySubMesh( face.Current() ))
3151 viscousSM.push_back( _mesh->GetSubMesh( face.Current() ));
3152 meshedSM[ MeshDim_2D ].remove( viscousSM.back() );
3154 if ( !quadFaceSM.empty() )
3155 FillNgMesh(occgeo, *_ngMesh, nodeVec, quadFaceSM, &quadHelper, pyramidMeshes[iS-1]);
3157 if ( !viscousSM.empty() )
3158 FillNgMesh(occgeo, *_ngMesh, nodeVec, viscousSM, &quadHelper, viscousMesh );
3160 // fill _ngMesh with faces of sub-meshes
3161 err = ! ( FillNgMesh(occgeo, *_ngMesh, nodeVec, meshedSM[ MeshDim_2D ], &quadHelper));
3162 initState = NETGENPlugin_ngMeshInfo(_ngMesh, /*checkRemovedElems=*/true);
3163 // toPython( _ngMesh );
3165 if (!err && _isVolume)
3167 // Pass 3D simple parameters to NETGEN
3168 const NETGENPlugin_SimpleHypothesis_3D* simple3d =
3169 dynamic_cast< const NETGENPlugin_SimpleHypothesis_3D* > ( _simpleHyp );
3171 if ( double vol = simple3d->GetMaxElementVolume() ) {
3173 mparams.maxh = pow( 72, 1/6. ) * pow( vol, 1/3. );
3174 mparams.maxh = min( mparams.maxh, occgeo.boundingbox.Diam()/2 );
3177 // length from faces
3178 mparams.maxh = _ngMesh->AverageH();
3180 _ngMesh->SetGlobalH (mparams.maxh);
3181 mparams.grading = 0.4;
3183 _ngMesh->CalcLocalH(mparams.grading);
3185 _ngMesh->CalcLocalH();
3188 // Care of vertices internal in solids and internal faces (issue 0020676)
3189 if ( internals.hasInternalVertexInSolid() || internals.hasInternalFaces() )
3191 // store computed faces in SMESH in order not to create SMESH
3192 // faces for ng faces added here
3193 FillSMesh( occgeo, *_ngMesh, initState, *_mesh, nodeVec, comment, &quadHelper );
3194 // add ng faces to solids with internal vertices
3195 AddIntVerticesInSolids( occgeo, *_ngMesh, nodeVec, internals );
3196 // duplicate mesh faces on internal faces
3197 FixIntFaces( occgeo, *_ngMesh, internals );
3198 initState = NETGENPlugin_ngMeshInfo(_ngMesh);
3200 // Let netgen compute 3D mesh
3201 startWith = endWith = netgen::MESHCONST_MESHVOLUME;
3206 err = netgen::OCCGenerateMesh(occgeo, _ngMesh, mparams, startWith, endWith);
3208 err = netgen::OCCGenerateMesh(occgeo, _ngMesh, startWith, endWith, optstr);
3210 if(netgen::multithread.terminate)
3213 if ( comment.empty() ) // do not overwrite a previous error
3214 comment << text(err);
3216 catch (Standard_Failure& ex)
3218 if ( comment.empty() ) // do not overwrite a previous error
3219 comment << text(ex);
3222 catch (netgen::NgException exc)
3224 if ( comment.empty() ) // do not overwrite a previous error
3225 comment << text(exc);
3228 _ticTime = ( doneTime += voluMeshingTime ) / _totalTime / _progressTic;
3230 // Let netgen optimize 3D mesh
3231 if ( !err && _optimize )
3233 startWith = endWith = netgen::MESHCONST_OPTVOLUME;
3238 err = netgen::OCCGenerateMesh(occgeo, _ngMesh, mparams, startWith, endWith);
3240 err = netgen::OCCGenerateMesh(occgeo, _ngMesh, startWith, endWith, optstr);
3242 if(netgen::multithread.terminate)
3245 if ( comment.empty() ) // do not overwrite a previous error
3246 comment << text(err);
3248 catch (Standard_Failure& ex)
3250 if ( comment.empty() ) // do not overwrite a previous error
3251 comment << text(ex);
3253 catch (netgen::NgException exc)
3255 if ( comment.empty() ) // do not overwrite a previous error
3256 comment << text(exc);
3260 if (!err && mparams.secondorder > 0)
3265 if ( !meshedSM[ MeshDim_1D ].empty() )
3267 // remove segments not attached to geometry (IPAL0052479)
3268 for (int i = 1; i <= _ngMesh->GetNSeg(); ++i)
3270 const netgen::Segment & seg = _ngMesh->LineSegment (i);
3271 if ( seg.epgeominfo[ 0 ].edgenr == 0 )
3272 _ngMesh->DeleteSegment( i );
3274 _ngMesh->Compress();
3276 // convert to quadratic
3277 netgen::OCCRefinementSurfaces ref (occgeo);
3278 ref.MakeSecondOrder (*_ngMesh);
3280 // care of elements already loaded to SMESH
3281 // if ( initState._nbSegments > 0 )
3282 // makeQuadratic( occgeo.emap, _mesh );
3283 // if ( initState._nbFaces > 0 )
3284 // makeQuadratic( occgeo.fmap, _mesh );
3286 catch (Standard_Failure& ex)
3288 if ( comment.empty() ) // do not overwrite a previous error
3289 comment << "Exception in netgen at passing to 2nd order ";
3291 catch (netgen::NgException exc)
3293 if ( comment.empty() ) // do not overwrite a previous error
3294 comment << exc.What();
3299 _ticTime = 0.98 / _progressTic;
3301 //int nbNod = _ngMesh->GetNP();
3302 //int nbSeg = _ngMesh->GetNSeg();
3303 int nbFac = _ngMesh->GetNSE();
3304 int nbVol = _ngMesh->GetNE();
3305 bool isOK = ( !err && (_isVolume ? (nbVol > 0) : (nbFac > 0)) );
3307 // Feed back the SMESHDS with the generated Nodes and Elements
3308 if ( true /*isOK*/ ) // get whatever built
3310 FillSMesh( occgeo, *_ngMesh, initState, *_mesh, nodeVec, comment, &quadHelper );
3312 if ( quadHelper.GetIsQuadratic() ) // remove free nodes
3314 for ( size_t i = 0; i < nodeVec.size(); ++i )
3315 if ( nodeVec[i] && nodeVec[i]->NbInverseElements() == 0 )
3317 _mesh->GetMeshDS()->RemoveFreeNode( nodeVec[i], 0, /*fromGroups=*/false );
3320 for ( size_t i = nodeVec.size()-1; i > 0; --i ) // remove trailing removed nodes
3322 nodeVec.resize( i );
3327 SMESH_ComputeErrorPtr readErr = ReadErrors(nodeVec);
3328 if ( readErr && readErr->HasBadElems() )
3331 if ( !comment.empty() && !readErr->myComment.empty() ) comment += "\n";
3332 comment += readErr->myComment;
3334 if ( error->IsOK() && ( !isOK || comment.size() > 0 ))
3335 error->myName = COMPERR_ALGO_FAILED;
3336 if ( !comment.empty() )
3337 error->myComment = comment;
3339 // SetIsAlwaysComputed( true ) to empty sub-meshes, which
3340 // appear if the geometry contains coincident sub-shape due
3341 // to bool merge_solids = 1; in netgen/libsrc/occ/occgenmesh.cpp
3342 const int nbMaps = 2;
3343 const TopTools_IndexedMapOfShape* geoMaps[nbMaps] =
3344 { & occgeo.vmap, & occgeo.emap/*, & occgeo.fmap*/ };
3345 for ( int iMap = 0; iMap < nbMaps; ++iMap )
3346 for (int i = 1; i <= geoMaps[iMap]->Extent(); i++)
3347 if ( SMESH_subMesh* sm = _mesh->GetSubMeshContaining( geoMaps[iMap]->FindKey(i)))
3348 if ( !sm->IsMeshComputed() )
3349 sm->SetIsAlwaysComputed( true );
3351 // set bad compute error to subshapes of all failed sub-shapes
3352 if ( !error->IsOK() )
3354 bool pb2D = false, pb3D = false;
3355 for (int i = 1; i <= occgeo.fmap.Extent(); i++) {
3356 int status = occgeo.facemeshstatus[i-1];
3357 if (status == netgen::FACE_MESHED_OK ) continue;
3358 if ( SMESH_subMesh* sm = _mesh->GetSubMeshContaining( occgeo.fmap( i ))) {
3359 SMESH_ComputeErrorPtr& smError = sm->GetComputeError();
3360 if ( !smError || smError->IsOK() ) {
3361 if ( status == netgen::FACE_FAILED )
3362 smError.reset( new SMESH_ComputeError( *error ));
3364 smError.reset( new SMESH_ComputeError( COMPERR_ALGO_FAILED, "Ignored" ));
3365 if ( SMESH_Algo::GetMeshError( sm ) == SMESH_Algo::MEr_OK )
3366 smError->myName = COMPERR_WARNING;
3368 pb2D = pb2D || smError->IsKO();
3371 if ( !pb2D ) // all faces are OK
3372 for (int i = 1; i <= occgeo.somap.Extent(); i++)
3373 if ( SMESH_subMesh* sm = _mesh->GetSubMeshContaining( occgeo.somap( i )))
3375 bool smComputed = nbVol && !sm->IsEmpty();
3376 if ( smComputed && internals.hasInternalVertexInSolid( sm->GetId() ))
3378 int nbIntV = internals.getSolidsWithVertices().find( sm->GetId() )->second.size();
3379 SMESHDS_SubMesh* smDS = sm->GetSubMeshDS();
3380 smComputed = ( smDS->NbElements() > 0 || smDS->NbNodes() > nbIntV );
3382 SMESH_ComputeErrorPtr& smError = sm->GetComputeError();
3383 if ( !smComputed && ( !smError || smError->IsOK() ))
3385 smError.reset( new SMESH_ComputeError( *error ));
3386 if ( nbVol && SMESH_Algo::GetMeshError( sm ) == SMESH_Algo::MEr_OK )
3388 smError->myName = COMPERR_WARNING;
3390 else if ( smError->HasBadElems() ) // bad surface mesh
3392 if ( !hasBadElemOnSolid
3393 ( static_cast<SMESH_BadInputElements*>( smError.get() )->myBadElements, sm ))
3397 pb3D = pb3D || ( smError && smError->IsKO() );
3399 if ( !pb2D && !pb3D )
3400 err = 0; // no fatal errors, only warnings
3403 ngLib._isComputeOk = !err;
3408 //=============================================================================
3412 //=============================================================================
3413 bool NETGENPlugin_Mesher::Evaluate(MapShapeNbElems& aResMap)
3415 netgen::MeshingParameters& mparams = netgen::mparam;
3418 // -------------------------
3419 // Prepare OCC geometry
3420 // -------------------------
3421 netgen::OCCGeometry occgeo;
3422 NETGENPlugin_Internals internals( *_mesh, _shape, _isVolume );
3423 PrepareOCCgeometry( occgeo, _shape, *_mesh, 0, &internals );
3425 bool tooManyElems = false;
3426 const int hugeNb = std::numeric_limits<int>::max() / 100;
3431 // pass 1D simple parameters to NETGEN
3434 // not to RestrictLocalH() according to curvature during MESHCONST_ANALYSE
3435 mparams.uselocalh = false;
3436 mparams.grading = 0.8; // not limitited size growth
3438 if ( _simpleHyp->GetNumberOfSegments() )
3440 mparams.maxh = occgeo.boundingbox.Diam();
3443 mparams.maxh = _simpleHyp->GetLocalLength();
3446 if ( mparams.maxh == 0.0 )
3447 mparams.maxh = occgeo.boundingbox.Diam();
3448 if ( _simpleHyp || ( mparams.minh == 0.0 && _fineness != NETGENPlugin_Hypothesis::UserDefined))
3449 mparams.minh = GetDefaultMinSize( _shape, mparams.maxh );
3451 // let netgen create _ngMesh and calculate element size on not meshed shapes
3452 NETGENPlugin_NetgenLibWrapper ngLib;
3453 netgen::Mesh *ngMesh = NULL;
3457 int startWith = netgen::MESHCONST_ANALYSE;
3458 int endWith = netgen::MESHCONST_MESHEDGES;
3460 int err = netgen::OCCGenerateMesh(occgeo, ngMesh, mparams, startWith, endWith);
3462 int err = netgen::OCCGenerateMesh(occgeo, ngMesh, startWith, endWith, optstr);
3465 if(netgen::multithread.terminate)
3468 ngLib.setMesh(( Ng_Mesh*) ngMesh );
3470 if ( SMESH_subMesh* sm = _mesh->GetSubMeshContaining( _shape ))
3471 sm->GetComputeError().reset( new SMESH_ComputeError( COMPERR_ALGO_FAILED ));
3474 // if ( _simpleHyp )
3476 // // Pass 1D simple parameters to NETGEN
3477 // // --------------------------------
3478 // int nbSeg = _simpleHyp->GetNumberOfSegments();
3479 // double segSize = _simpleHyp->GetLocalLength();
3480 // for ( int iE = 1; iE <= occgeo.emap.Extent(); ++iE )
3482 // const TopoDS_Edge& e = TopoDS::Edge( occgeo.emap(iE));
3484 // segSize = SMESH_Algo::EdgeLength( e ) / ( nbSeg - 0.4 );
3485 // setLocalSize( e, segSize, *ngMesh );
3488 // else // if ( ! _simpleHyp )
3490 // // Local size on shapes
3491 // SetLocalSize( occgeo, *ngMesh );
3493 // calculate total nb of segments and length of edges
3494 double fullLen = 0.0;
3496 int entity = mparams.secondorder > 0 ? SMDSEntity_Quad_Edge : SMDSEntity_Edge;
3497 TopTools_DataMapOfShapeInteger Edge2NbSeg;
3498 for (TopExp_Explorer exp(_shape, TopAbs_EDGE); exp.More(); exp.Next())
3500 TopoDS_Edge E = TopoDS::Edge( exp.Current() );
3501 if( !Edge2NbSeg.Bind(E,0) )
3504 double aLen = SMESH_Algo::EdgeLength(E);
3507 vector<int>& aVec = aResMap[_mesh->GetSubMesh(E)];
3509 aVec.resize( SMDSEntity_Last, 0);
3511 fullNbSeg += aVec[ entity ];
3514 // store nb of segments computed by Netgen
3515 NCollection_Map<Link> linkMap;
3516 for (int i = 1; i <= ngMesh->GetNSeg(); ++i )
3518 const netgen::Segment& seg = ngMesh->LineSegment(i);
3519 Link link(seg[0], seg[1]);
3520 if ( !linkMap.Add( link )) continue;
3521 int aGeomEdgeInd = seg.epgeominfo[0].edgenr;
3522 if (aGeomEdgeInd > 0 && aGeomEdgeInd <= occgeo.emap.Extent())
3524 vector<int>& aVec = aResMap[_mesh->GetSubMesh(occgeo.emap(aGeomEdgeInd))];
3528 // store nb of nodes on edges computed by Netgen
3529 TopTools_DataMapIteratorOfDataMapOfShapeInteger Edge2NbSegIt(Edge2NbSeg);
3530 for (; Edge2NbSegIt.More(); Edge2NbSegIt.Next())
3532 vector<int>& aVec = aResMap[_mesh->GetSubMesh(Edge2NbSegIt.Key())];
3533 if ( aVec[ entity ] > 1 && aVec[ SMDSEntity_Node ] == 0 )
3534 aVec[SMDSEntity_Node] = mparams.secondorder > 0 ? 2*aVec[ entity ]-1 : aVec[ entity ]-1;
3536 fullNbSeg += aVec[ entity ];
3537 Edge2NbSeg( Edge2NbSegIt.Key() ) = aVec[ entity ];
3539 if ( fullNbSeg == 0 )
3546 if ( double area = _simpleHyp->GetMaxElementArea() ) {
3548 mparams.maxh = sqrt(2. * area/sqrt(3.0));
3549 mparams.grading = 0.4; // moderate size growth
3552 // length from edges
3553 mparams.maxh = fullLen/fullNbSeg;
3554 mparams.grading = 0.2; // slow size growth
3557 mparams.maxh = min( mparams.maxh, occgeo.boundingbox.Diam()/2 );
3558 mparams.maxh = min( mparams.maxh, fullLen/fullNbSeg * (1. + mparams.grading));
3560 for (TopExp_Explorer exp(_shape, TopAbs_FACE); exp.More(); exp.Next())
3562 TopoDS_Face F = TopoDS::Face( exp.Current() );
3563 SMESH_subMesh *sm = _mesh->GetSubMesh(F);
3565 BRepGProp::SurfaceProperties(F,G);
3566 double anArea = G.Mass();
3567 tooManyElems = tooManyElems || ( anArea/hugeNb > mparams.maxh*mparams.maxh );
3569 if ( !tooManyElems )
3571 TopTools_MapOfShape edges;
3572 for (TopExp_Explorer exp1(F,TopAbs_EDGE); exp1.More(); exp1.Next())
3573 if ( edges.Add( exp1.Current() ))
3574 nb1d += Edge2NbSeg.Find(exp1.Current());
3576 int nbFaces = tooManyElems ? hugeNb : int( 4*anArea / (mparams.maxh*mparams.maxh*sqrt(3.)));
3577 int nbNodes = tooManyElems ? hugeNb : (( nbFaces*3 - (nb1d-1)*2 ) / 6 + 1 );
3579 vector<int> aVec(SMDSEntity_Last, 0);
3580 if( mparams.secondorder > 0 ) {
3581 int nb1d_in = (nbFaces*3 - nb1d) / 2;
3582 aVec[SMDSEntity_Node] = nbNodes + nb1d_in;
3583 aVec[SMDSEntity_Quad_Triangle] = nbFaces;
3586 aVec[SMDSEntity_Node] = Max ( nbNodes, 0 );
3587 aVec[SMDSEntity_Triangle] = nbFaces;
3589 aResMap[sm].swap(aVec);
3596 // pass 3D simple parameters to NETGEN
3597 const NETGENPlugin_SimpleHypothesis_3D* simple3d =
3598 dynamic_cast< const NETGENPlugin_SimpleHypothesis_3D* > ( _simpleHyp );
3600 if ( double vol = simple3d->GetMaxElementVolume() ) {
3602 mparams.maxh = pow( 72, 1/6. ) * pow( vol, 1/3. );
3603 mparams.maxh = min( mparams.maxh, occgeo.boundingbox.Diam()/2 );
3606 // using previous length from faces
3608 mparams.grading = 0.4;
3609 mparams.maxh = min( mparams.maxh, fullLen/fullNbSeg * (1. + mparams.grading));
3612 BRepGProp::VolumeProperties(_shape,G);
3613 double aVolume = G.Mass();
3614 double tetrVol = 0.1179*mparams.maxh*mparams.maxh*mparams.maxh;
3615 tooManyElems = tooManyElems || ( aVolume/hugeNb > tetrVol );
3616 int nbVols = tooManyElems ? hugeNb : int(aVolume/tetrVol);
3617 int nb1d_in = int(( nbVols*6 - fullNbSeg ) / 6 );
3618 vector<int> aVec(SMDSEntity_Last, 0 );
3619 if ( tooManyElems ) // avoid FPE
3621 aVec[SMDSEntity_Node] = hugeNb;
3622 aVec[ mparams.secondorder > 0 ? SMDSEntity_Quad_Tetra : SMDSEntity_Tetra] = hugeNb;
3626 if( mparams.secondorder > 0 ) {
3627 aVec[SMDSEntity_Node] = nb1d_in/3 + 1 + nb1d_in;
3628 aVec[SMDSEntity_Quad_Tetra] = nbVols;
3631 aVec[SMDSEntity_Node] = nb1d_in/3 + 1;
3632 aVec[SMDSEntity_Tetra] = nbVols;
3635 SMESH_subMesh *sm = _mesh->GetSubMesh(_shape);
3636 aResMap[sm].swap(aVec);
3642 double NETGENPlugin_Mesher::GetProgress(const SMESH_Algo* holder,
3643 const int * algoProgressTic,
3644 const double * algoProgress) const
3646 ((int&) _progressTic ) = *algoProgressTic + 1;
3648 if ( !_occgeom ) return 0;
3650 double progress = -1;
3653 if ( _ticTime < 0 && netgen::multithread.task[0] == 'O'/*Optimizing surface*/ )
3655 ((double&) _ticTime ) = edgeFaceMeshingTime / _totalTime / _progressTic;
3657 else if ( !_optimize /*&& _occgeom->fmap.Extent() > 1*/ )
3659 int doneShapeIndex = -1;
3660 while ( doneShapeIndex+1 < _occgeom->facemeshstatus.Size() &&
3661 _occgeom->facemeshstatus[ doneShapeIndex+1 ])
3663 if ( doneShapeIndex+1 != _curShapeIndex )
3665 ((int&) _curShapeIndex) = doneShapeIndex+1;
3666 double doneShapeRate = _curShapeIndex / double( _occgeom->fmap.Extent() );
3667 double doneTime = edgeMeshingTime + doneShapeRate * faceMeshingTime;
3668 ((double&) _ticTime) = doneTime / _totalTime / _progressTic;
3669 // cout << "shape " << _curShapeIndex << " _ticTime " << _ticTime
3670 // << " " << doneTime / _totalTime / _progressTic << endl;
3674 else if ( !_optimize && _occgeom->somap.Extent() > 1 )
3676 int curShapeIndex = _curShapeIndex;
3677 if ( _ngMesh->GetNE() > 0 )
3679 netgen::Element el = (*_ngMesh)[netgen::ElementIndex( _ngMesh->GetNE()-1 )];
3680 curShapeIndex = el.GetIndex();
3682 if ( curShapeIndex != _curShapeIndex )
3684 ((int&) _curShapeIndex) = curShapeIndex;
3685 double doneShapeRate = _curShapeIndex / double( _occgeom->somap.Extent() );
3686 double doneTime = edgeFaceMeshingTime + doneShapeRate * voluMeshingTime;
3687 ((double&) _ticTime) = doneTime / _totalTime / _progressTic;
3688 // cout << "shape " << _curShapeIndex << " _ticTime " << _ticTime
3689 // << " " << doneTime / _totalTime / _progressTic << endl;
3694 progress = Max( *algoProgressTic * _ticTime, *algoProgress );
3699 netgen::multithread.task[0] == 'D'/*elaunay meshing*/ &&
3700 progress > voluMeshingTime )
3702 progress = voluMeshingTime;
3703 ((double&) _ticTime) = voluMeshingTime / _totalTime / _progressTic;
3705 ((int&) *algoProgressTic )++;
3706 ((double&) *algoProgress) = progress;
3708 //cout << progress << " " << *algoProgressTic << " " << netgen::multithread.task << " "<< _ticTime << endl;
3710 return Min( progress, 0.99 );
3713 //================================================================================
3715 * \brief Read mesh entities preventing successful computation from "test.out" file
3717 //================================================================================
3719 SMESH_ComputeErrorPtr
3720 NETGENPlugin_Mesher::ReadErrors(const vector<const SMDS_MeshNode* >& nodeVec)
3722 if ( nodeVec.size() < 2 ) return SMESH_ComputeErrorPtr();
3723 SMESH_BadInputElements* err =
3724 new SMESH_BadInputElements( nodeVec.back()->GetMesh(), COMPERR_BAD_INPUT_MESH,
3725 "Some edges multiple times in surface mesh");
3726 SMESH_File file("test.out");
3728 vector<int> three1(3), three2(3);
3729 const char* badEdgeStr = " multiple times in surface mesh";
3730 const int badEdgeStrLen = strlen( badEdgeStr );
3731 const int nbNodes = nodeVec.size();
3733 while( !file.eof() )
3735 if ( strncmp( file, "Edge ", 5 ) == 0 &&
3736 file.getInts( two ) &&
3737 strncmp( file, badEdgeStr, badEdgeStrLen ) == 0 &&
3738 two[0] < nbNodes && two[1] < nbNodes )
3740 err->myBadElements.push_back( new SMDS_LinearEdge( nodeVec[ two[0]], nodeVec[ two[1]] ));
3741 file += badEdgeStrLen;
3743 else if ( strncmp( file, "Intersecting: ", 14 ) == 0 )
3746 // openelement 18 with open element 126
3750 const char* pos = file;
3751 bool ok = ( strncmp( file, "openelement ", 12 ) == 0 );
3752 ok = ok && file.getInts( two );
3753 ok = ok && file.getInts( three1 );
3754 ok = ok && file.getInts( three2 );
3755 for ( int i = 0; ok && i < 3; ++i )
3756 ok = ( three1[i] < nbNodes && nodeVec[ three1[i]]);
3757 for ( int i = 0; ok && i < 3; ++i )
3758 ok = ( three2[i] < nbNodes && nodeVec[ three2[i]]);
3761 err->myBadElements.push_back( new SMDS_FaceOfNodes( nodeVec[ three1[0]],
3762 nodeVec[ three1[1]],
3763 nodeVec[ three1[2]]));
3764 err->myBadElements.push_back( new SMDS_FaceOfNodes( nodeVec[ three2[0]],
3765 nodeVec[ three2[1]],
3766 nodeVec[ three2[2]]));
3767 err->myComment = "Intersecting triangles";
3781 size_t nbBadElems = err->myBadElements.size();
3782 if ( nbBadElems ) nbBadElems++; // avoid warning: variable set but not used
3785 return SMESH_ComputeErrorPtr( err );
3788 //================================================================================
3790 * \brief Write a python script creating an equivalent SALOME mesh.
3791 * This is useful to see what mesh is passed as input for the next step of mesh
3792 * generation (of mesh of higher dimension)
3794 //================================================================================
3796 void NETGENPlugin_Mesher::toPython( const netgen::Mesh* ngMesh )
3798 const char* pyFile = "/tmp/ngMesh.py";
3799 ofstream outfile( pyFile, ios::out );
3800 if ( !outfile ) return;
3802 outfile << "import salome, SMESH" << endl
3803 << "from salome.smesh import smeshBuilder" << endl
3804 << "smesh = smeshBuilder.New()" << endl
3805 << "mesh = smesh.Mesh()" << endl << endl;
3807 using namespace netgen;
3809 for (pi = PointIndex::BASE;
3810 pi < ngMesh->GetNP()+PointIndex::BASE; pi++)
3812 outfile << "mesh.AddNode( ";
3813 outfile << (*ngMesh)[pi](0) << ", ";
3814 outfile << (*ngMesh)[pi](1) << ", ";
3815 outfile << (*ngMesh)[pi](2) << ") ## "<< pi << endl;
3818 int nbDom = ngMesh->GetNDomains();
3819 for ( int i = 0; i < nbDom; ++i )
3820 outfile<< "grp" << i+1 << " = mesh.CreateEmptyGroup( SMESH.FACE, 'domain"<< i+1 << "')"<< endl;
3822 SurfaceElementIndex sei;
3823 for (sei = 0; sei < ngMesh->GetNSE(); sei++)
3825 outfile << "mesh.AddFace([ ";
3826 Element2d sel = (*ngMesh)[sei];
3827 for (int j = 0; j < sel.GetNP(); j++)
3828 outfile << sel[j] << ( j+1 < sel.GetNP() ? ", " : " ])");
3829 if ( sel.IsDeleted() ) outfile << " ## IsDeleted ";
3832 if ((*ngMesh)[sei].GetIndex())
3834 if ( int dom1 = ngMesh->GetFaceDescriptor((*ngMesh)[sei].GetIndex ()).DomainIn())
3835 outfile << "grp"<< dom1 <<".Add([ " << (int)sei+1 << " ])" << endl;
3836 if ( int dom2 = ngMesh->GetFaceDescriptor((*ngMesh)[sei].GetIndex ()).DomainOut())
3837 outfile << "grp"<< dom2 <<".Add([ " << (int)sei+1 << " ])" << endl;
3841 for (ElementIndex ei = 0; ei < ngMesh->GetNE(); ei++)
3843 Element el = (*ngMesh)[ei];
3844 outfile << "mesh.AddVolume([ ";
3845 for (int j = 0; j < el.GetNP(); j++)
3846 outfile << el[j] << ( j+1 < el.GetNP() ? ", " : " ])");
3850 for (int i = 1; i <= ngMesh->GetNSeg(); i++)
3852 const Segment & seg = ngMesh->LineSegment (i);
3853 outfile << "mesh.AddEdge([ "
3855 << seg[1] << " ])" << endl;
3857 cout << "Write " << pyFile << endl;
3860 //================================================================================
3862 * \brief Constructor of NETGENPlugin_ngMeshInfo
3864 //================================================================================
3866 NETGENPlugin_ngMeshInfo::NETGENPlugin_ngMeshInfo( netgen::Mesh* ngMesh,
3867 bool checkRemovedElems):
3868 _elementsRemoved( false ), _copyOfLocalH(0)
3872 _nbNodes = ngMesh->GetNP();
3873 _nbSegments = ngMesh->GetNSeg();
3874 _nbFaces = ngMesh->GetNSE();
3875 _nbVolumes = ngMesh->GetNE();
3877 if ( checkRemovedElems )
3878 for ( int i = 1; i <= ngMesh->GetNSE() && !_elementsRemoved; ++i )
3879 _elementsRemoved = ngMesh->SurfaceElement(i).IsDeleted();
3883 _nbNodes = _nbSegments = _nbFaces = _nbVolumes = 0;
3887 //================================================================================
3889 * \brief Copy LocalH member from one netgen mesh to another
3891 //================================================================================
3893 void NETGENPlugin_ngMeshInfo::transferLocalH( netgen::Mesh* fromMesh,
3894 netgen::Mesh* toMesh )
3896 if ( !fromMesh->LocalHFunctionGenerated() ) return;
3897 if ( !toMesh->LocalHFunctionGenerated() )
3899 toMesh->CalcLocalH(netgen::mparam.grading);
3901 toMesh->CalcLocalH();
3904 const size_t size = sizeof( netgen::LocalH );
3905 _copyOfLocalH = new char[ size ];
3906 memcpy( (void*)_copyOfLocalH, (void*)&toMesh->LocalHFunction(), size );
3907 memcpy( (void*)&toMesh->LocalHFunction(), (void*)&fromMesh->LocalHFunction(), size );
3910 //================================================================================
3912 * \brief Restore LocalH member of a netgen mesh
3914 //================================================================================
3916 void NETGENPlugin_ngMeshInfo::restoreLocalH( netgen::Mesh* toMesh )
3918 if ( _copyOfLocalH )
3920 const size_t size = sizeof( netgen::LocalH );
3921 memcpy( (void*)&toMesh->LocalHFunction(), (void*)_copyOfLocalH, size );
3922 delete [] _copyOfLocalH;
3927 //================================================================================
3929 * \brief Find "internal" sub-shapes
3931 //================================================================================
3933 NETGENPlugin_Internals::NETGENPlugin_Internals( SMESH_Mesh& mesh,
3934 const TopoDS_Shape& shape,
3936 : _mesh( mesh ), _is3D( is3D )
3938 SMESHDS_Mesh* meshDS = mesh.GetMeshDS();
3940 TopExp_Explorer f,e;
3941 for ( f.Init( shape, TopAbs_FACE ); f.More(); f.Next() )
3943 int faceID = meshDS->ShapeToIndex( f.Current() );
3945 // find not computed internal edges
3947 for ( e.Init( f.Current().Oriented(TopAbs_FORWARD), TopAbs_EDGE ); e.More(); e.Next() )
3948 if ( e.Current().Orientation() == TopAbs_INTERNAL )
3950 SMESH_subMesh* eSM = mesh.GetSubMesh( e.Current() );
3951 if ( eSM->IsEmpty() )
3953 _e2face.insert( make_pair( eSM->GetId(), faceID ));
3954 for ( TopoDS_Iterator v(e.Current()); v.More(); v.Next() )
3955 _e2face.insert( make_pair( meshDS->ShapeToIndex( v.Value() ), faceID ));
3959 // find internal vertices in a face
3960 set<int> intVV; // issue 0020850 where same vertex is twice in a face
3961 for ( TopoDS_Iterator fSub( f.Current() ); fSub.More(); fSub.Next())
3962 if ( fSub.Value().ShapeType() == TopAbs_VERTEX )
3964 int vID = meshDS->ShapeToIndex( fSub.Value() );
3965 if ( intVV.insert( vID ).second )
3966 _f2v[ faceID ].push_back( vID );
3971 // find internal faces and their subshapes where nodes are to be doubled
3972 // to make a crack with non-sewed borders
3974 if ( f.Current().Orientation() == TopAbs_INTERNAL )
3976 _intShapes.insert( meshDS->ShapeToIndex( f.Current() ));
3979 list< TopoDS_Shape > edges;
3980 for ( e.Init( f.Current(), TopAbs_EDGE ); e.More(); e.Next())
3981 if ( SMESH_MesherHelper::NbAncestors( e.Current(), mesh, TopAbs_FACE ) > 1 )
3983 _intShapes.insert( meshDS->ShapeToIndex( e.Current() ));
3984 edges.push_back( e.Current() );
3985 // find border faces
3986 PShapeIteratorPtr fIt =
3987 SMESH_MesherHelper::GetAncestors( edges.back(),mesh,TopAbs_FACE );
3988 while ( const TopoDS_Shape* pFace = fIt->next() )
3989 if ( !pFace->IsSame( f.Current() ))
3990 _borderFaces.insert( meshDS->ShapeToIndex( *pFace ));
3993 // we consider vertex internal if it is shared by more than one internal edge
3994 list< TopoDS_Shape >::iterator edge = edges.begin();
3995 for ( ; edge != edges.end(); ++edge )
3996 for ( TopoDS_Iterator v( *edge ); v.More(); v.Next() )
3998 set<int> internalEdges;
3999 PShapeIteratorPtr eIt =
4000 SMESH_MesherHelper::GetAncestors( v.Value(),mesh,TopAbs_EDGE );
4001 while ( const TopoDS_Shape* pEdge = eIt->next() )
4003 int edgeID = meshDS->ShapeToIndex( *pEdge );
4004 if ( isInternalShape( edgeID ))
4005 internalEdges.insert( edgeID );
4007 if ( internalEdges.size() > 1 )
4008 _intShapes.insert( meshDS->ShapeToIndex( v.Value() ));
4012 } // loop on geom faces
4014 // find vertices internal in solids
4017 for ( TopExp_Explorer so(shape, TopAbs_SOLID); so.More(); so.Next())
4019 int soID = meshDS->ShapeToIndex( so.Current() );
4020 for ( TopoDS_Iterator soSub( so.Current() ); soSub.More(); soSub.Next())
4021 if ( soSub.Value().ShapeType() == TopAbs_VERTEX )
4022 _s2v[ soID ].push_back( meshDS->ShapeToIndex( soSub.Value() ));
4027 //================================================================================
4029 * \brief Find mesh faces on non-internal geom faces sharing internal edge
4030 * some nodes of which are to be doubled to make the second border of the "crack"
4032 //================================================================================
4034 void NETGENPlugin_Internals::findBorderElements( TIDSortedElemSet & borderElems )
4036 if ( _intShapes.empty() ) return;
4038 SMESH_Mesh& mesh = const_cast<SMESH_Mesh&>(_mesh);
4039 SMESHDS_Mesh* meshDS = mesh.GetMeshDS();
4041 // loop on internal geom edges
4042 set<int>::const_iterator intShapeId = _intShapes.begin();
4043 for ( ; intShapeId != _intShapes.end(); ++intShapeId )
4045 const TopoDS_Shape& s = meshDS->IndexToShape( *intShapeId );
4046 if ( s.ShapeType() != TopAbs_EDGE ) continue;
4048 // get internal and non-internal geom faces sharing the internal edge <s>
4050 set<int>::iterator bordFace = _borderFaces.end();
4051 PShapeIteratorPtr faces = SMESH_MesherHelper::GetAncestors( s, _mesh, TopAbs_FACE );
4052 while ( const TopoDS_Shape* pFace = faces->next() )
4054 int faceID = meshDS->ShapeToIndex( *pFace );
4055 if ( isInternalShape( faceID ))
4058 bordFace = _borderFaces.insert( faceID ).first;
4060 if ( bordFace == _borderFaces.end() || !intFace ) continue;
4062 // get all links of mesh faces on internal geom face sharing nodes on edge <s>
4063 set< SMESH_OrientedLink > links; //!< links of faces on internal geom face
4064 list<const SMDS_MeshElement*> suspectFaces[2]; //!< mesh faces on border geom faces
4065 int nbSuspectFaces = 0;
4066 SMESHDS_SubMesh* intFaceSM = meshDS->MeshElements( intFace );
4067 if ( !intFaceSM || intFaceSM->NbElements() == 0 ) continue;
4068 SMESH_subMeshIteratorPtr smIt = mesh.GetSubMesh( s )->getDependsOnIterator(true,true);
4069 while ( smIt->more() )
4071 SMESHDS_SubMesh* sm = smIt->next()->GetSubMeshDS();
4072 if ( !sm ) continue;
4073 SMDS_NodeIteratorPtr nIt = sm->GetNodes();
4074 while ( nIt->more() )
4076 const SMDS_MeshNode* nOnEdge = nIt->next();
4077 SMDS_ElemIteratorPtr fIt = nOnEdge->GetInverseElementIterator(SMDSAbs_Face);
4078 while ( fIt->more() )
4080 const SMDS_MeshElement* f = fIt->next();
4081 const int nbNodes = f->NbCornerNodes();
4082 if ( intFaceSM->Contains( f ))
4084 for ( int i = 0; i < nbNodes; ++i )
4085 links.insert( SMESH_OrientedLink( f->GetNode(i), f->GetNode((i+1)%nbNodes)));
4090 for ( int i = 0; i < nbNodes; ++i )
4091 nbDblNodes += isInternalShape( f->GetNode(i)->getshapeId() );
4093 suspectFaces[ nbDblNodes < 2 ].push_back( f );
4099 // suspectFaces[0] having link with same orientation as mesh faces on
4100 // the internal geom face are <borderElems>. suspectFaces[1] have
4101 // only one node on edge <s>, we decide on them later (at the 2nd loop)
4102 // by links of <borderElems> found at the 1st and 2nd loops
4103 set< SMESH_OrientedLink > borderLinks;
4104 for ( int isPostponed = 0; isPostponed < 2; ++isPostponed )
4106 list<const SMDS_MeshElement*>::iterator fIt = suspectFaces[isPostponed].begin();
4107 for ( int nbF = 0; fIt != suspectFaces[isPostponed].end(); ++fIt, ++nbF )
4109 const SMDS_MeshElement* f = *fIt;
4110 bool isBorder = false, linkFound = false, borderLinkFound = false;
4111 list< SMESH_OrientedLink > faceLinks;
4112 int nbNodes = f->NbCornerNodes();
4113 for ( int i = 0; i < nbNodes; ++i )
4115 SMESH_OrientedLink link( f->GetNode(i), f->GetNode((i+1)%nbNodes));
4116 faceLinks.push_back( link );
4119 set< SMESH_OrientedLink >::iterator foundLink = links.find( link );
4120 if ( foundLink != links.end() )
4123 isBorder = ( foundLink->_reversed == link._reversed );
4124 if ( !isBorder && !isPostponed ) break;
4125 faceLinks.pop_back();
4127 else if ( isPostponed && !borderLinkFound )
4129 foundLink = borderLinks.find( link );
4130 if ( foundLink != borderLinks.end() )
4132 borderLinkFound = true;
4133 isBorder = ( foundLink->_reversed != link._reversed );
4140 borderElems.insert( f );
4141 borderLinks.insert( faceLinks.begin(), faceLinks.end() );
4143 else if ( !linkFound && !borderLinkFound )
4145 suspectFaces[1].push_back( f );
4146 if ( nbF > 2 * nbSuspectFaces )
4147 break; // dead loop protection
4154 //================================================================================
4156 * \brief put internal shapes in maps and fill in submeshes to precompute
4158 //================================================================================
4160 void NETGENPlugin_Internals::getInternalEdges( TopTools_IndexedMapOfShape& fmap,
4161 TopTools_IndexedMapOfShape& emap,
4162 TopTools_IndexedMapOfShape& vmap,
4163 list< SMESH_subMesh* > smToPrecompute[])
4165 if ( !hasInternalEdges() ) return;
4166 map<int,int>::const_iterator ev_face = _e2face.begin();
4167 for ( ; ev_face != _e2face.end(); ++ev_face )
4169 const TopoDS_Shape& ev = _mesh.GetMeshDS()->IndexToShape( ev_face->first );
4170 const TopoDS_Shape& face = _mesh.GetMeshDS()->IndexToShape( ev_face->second );
4172 ( ev.ShapeType() == TopAbs_EDGE ? emap : vmap ).Add( ev );
4174 //cout<<"INTERNAL EDGE or VERTEX "<<ev_face->first<<" on face "<<ev_face->second<<endl;
4176 smToPrecompute[ MeshDim_1D ].push_back( _mesh.GetSubMeshContaining( ev_face->first ));
4180 //================================================================================
4182 * \brief return shapes and submeshes to be meshed and already meshed boundary submeshes
4184 //================================================================================
4186 void NETGENPlugin_Internals::getInternalFaces( TopTools_IndexedMapOfShape& fmap,
4187 TopTools_IndexedMapOfShape& emap,
4188 list< SMESH_subMesh* >& intFaceSM,
4189 list< SMESH_subMesh* >& boundarySM)
4191 if ( !hasInternalFaces() ) return;
4193 // <fmap> and <emap> are for not yet meshed shapes
4194 // <intFaceSM> is for submeshes of faces
4195 // <boundarySM> is for meshed edges and vertices
4200 set<int> shapeIDs ( _intShapes );
4201 if ( !_borderFaces.empty() )
4202 shapeIDs.insert( _borderFaces.begin(), _borderFaces.end() );
4204 set<int>::const_iterator intS = shapeIDs.begin();
4205 for ( ; intS != shapeIDs.end(); ++intS )
4207 SMESH_subMesh* sm = _mesh.GetSubMeshContaining( *intS );
4209 if ( sm->GetSubShape().ShapeType() != TopAbs_FACE ) continue;
4211 intFaceSM.push_back( sm );
4213 // add submeshes of not computed internal faces
4214 if ( !sm->IsEmpty() ) continue;
4216 SMESH_subMeshIteratorPtr smIt = sm->getDependsOnIterator(true,true);
4217 while ( smIt->more() )
4220 const TopoDS_Shape& s = sm->GetSubShape();
4222 if ( sm->IsEmpty() )
4225 switch ( s.ShapeType() ) {
4226 case TopAbs_FACE: fmap.Add ( s ); break;
4227 case TopAbs_EDGE: emap.Add ( s ); break;
4233 if ( s.ShapeType() != TopAbs_FACE )
4234 boundarySM.push_back( sm );
4240 //================================================================================
4242 * \brief Return true if given shape is to be precomputed in order to be correctly
4243 * added to netgen mesh
4245 //================================================================================
4247 bool NETGENPlugin_Internals::isShapeToPrecompute(const TopoDS_Shape& s)
4249 int shapeID = _mesh.GetMeshDS()->ShapeToIndex( s );
4250 switch ( s.ShapeType() ) {
4251 case TopAbs_FACE : break; //return isInternalShape( shapeID ) || isBorderFace( shapeID );
4252 case TopAbs_EDGE : return isInternalEdge( shapeID );
4253 case TopAbs_VERTEX: break;
4259 //================================================================================
4261 * \brief Return SMESH
4263 //================================================================================
4265 SMESH_Mesh& NETGENPlugin_Internals::getMesh() const
4267 return const_cast<SMESH_Mesh&>( _mesh );
4270 //================================================================================
4272 * \brief Access to a counter of NETGENPlugin_NetgenLibWrapper instances
4274 //================================================================================
4276 int& NETGENPlugin_NetgenLibWrapper::instanceCounter()
4278 static int theCouner = 0;
4282 //================================================================================
4284 * \brief Initialize netgen library
4286 //================================================================================
4288 NETGENPlugin_NetgenLibWrapper::NETGENPlugin_NetgenLibWrapper()
4290 if ( instanceCounter() == 0 )
4293 ++instanceCounter();
4295 _isComputeOk = false;
4299 if ( !getenv( "KEEP_NETGEN_OUTPUT" ))
4301 // redirect all netgen output (mycout,myerr,cout) to _outputFileName
4302 _outputFileName = getOutputFileName();
4303 _ngcout = netgen::mycout;
4304 _ngcerr = netgen::myerr;
4305 netgen::mycout = new ofstream ( _outputFileName.c_str() );
4306 netgen::myerr = netgen::mycout;
4307 _coutBuffer = std::cout.rdbuf();
4309 cout << "NOTE: netgen output is redirected to file " << _outputFileName << endl;
4311 std::cout.rdbuf( netgen::mycout->rdbuf() );
4315 _ngMesh = Ng_NewMesh();
4318 //================================================================================
4320 * \brief Finish using netgen library
4322 //================================================================================
4324 NETGENPlugin_NetgenLibWrapper::~NETGENPlugin_NetgenLibWrapper()
4326 --instanceCounter();
4328 Ng_DeleteMesh( _ngMesh );
4332 std::cout.rdbuf( _coutBuffer );
4339 //================================================================================
4341 * \brief Set netgen mesh to delete at destruction
4343 //================================================================================
4345 void NETGENPlugin_NetgenLibWrapper::setMesh( Ng_Mesh* mesh )
4348 Ng_DeleteMesh( _ngMesh );
4352 //================================================================================
4354 * \brief Return a unique file name
4356 //================================================================================
4358 std::string NETGENPlugin_NetgenLibWrapper::getOutputFileName()
4360 std::string aTmpDir = SALOMEDS_Tool::GetTmpDir();
4362 TCollection_AsciiString aGenericName = (char*)aTmpDir.c_str();
4363 aGenericName += "NETGEN_";
4365 aGenericName += getpid();
4367 aGenericName += _getpid();
4369 aGenericName += "_";
4370 aGenericName += Abs((Standard_Integer)(long) aGenericName.ToCString());
4371 aGenericName += ".out";
4373 return aGenericName.ToCString();
4376 //================================================================================
4378 * \brief Remove "test.out" and "problemfaces" files in current directory
4380 //================================================================================
4382 void NETGENPlugin_NetgenLibWrapper::RemoveTmpFiles()
4384 bool rm = SMESH_File("test.out").remove() ;
4386 if ( rm && netgen::testout && instanceCounter() == 0 )
4388 delete netgen::testout;
4389 netgen::testout = 0;
4392 SMESH_File("problemfaces").remove();
4393 SMESH_File("occmesh.rep").remove();
4396 //================================================================================
4398 * \brief Remove file with netgen output
4400 //================================================================================
4402 void NETGENPlugin_NetgenLibWrapper::removeOutputFile()
4404 if ( !_outputFileName.empty() )
4408 delete netgen::mycout;
4409 netgen::mycout = _ngcout;
4410 netgen::myerr = _ngcerr;
4413 string tmpDir = SALOMEDS_Tool::GetDirFromPath ( _outputFileName );
4414 string aFileName = SALOMEDS_Tool::GetNameFromPath( _outputFileName ) + ".out";
4415 SALOMEDS_Tool::ListOfFiles aFiles;
4417 aFiles.push_back(aFileName.c_str());
4419 SALOMEDS_Tool::RemoveTemporaryFiles( tmpDir.c_str(), aFiles, true );