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 <BRepBuilderAPI_Copy.hxx>
56 #include <BRep_Tool.hxx>
57 #include <Bnd_B3d.hxx>
58 #include <NCollection_Map.hxx>
59 #include <Standard_ErrorHandler.hxx>
60 #include <Standard_ProgramError.hxx>
61 #include <TColStd_MapOfInteger.hxx>
63 #include <TopExp_Explorer.hxx>
64 #include <TopTools_DataMapIteratorOfDataMapOfShapeInteger.hxx>
65 #include <TopTools_DataMapIteratorOfDataMapOfShapeShape.hxx>
66 #include <TopTools_DataMapOfShapeInteger.hxx>
67 #include <TopTools_DataMapOfShapeShape.hxx>
68 #include <TopTools_MapOfShape.hxx>
71 // Netgen include files
75 #include <occgeom.hpp>
76 #include <meshing.hpp>
77 //#include <ngexception.hpp>
80 extern int OCCGenerateMesh (OCCGeometry&, Mesh*&, MeshingParameters&, int, int);
82 extern int OCCGenerateMesh (OCCGeometry&, Mesh*&, int, int, char*);
84 //extern void OCCSetLocalMeshSize(OCCGeometry & geom, Mesh & mesh);
85 extern MeshingParameters mparam;
86 extern volatile multithreadt multithread;
87 extern bool merge_solids;
89 // values used for occgeo.facemeshstatus
90 enum EFaceMeshStatus { FACE_NOT_TREATED = 0,
102 using namespace nglib;
106 #define nodeVec_ACCESS(index) ((SMDS_MeshNode*) nodeVec.at((index)))
108 #define nodeVec_ACCESS(index) ((SMDS_MeshNode*) nodeVec[index])
111 #define NGPOINT_COORDS(p) p(0),p(1),p(2)
114 // dump elements added to ng mesh
115 //#define DUMP_SEGMENTS
116 //#define DUMP_TRIANGLES
117 //#define DUMP_TRIANGLES_SCRIPT "/tmp/trias.py" //!< debug AddIntVerticesInSolids()
120 TopTools_IndexedMapOfShape ShapesWithLocalSize;
121 std::map<int,double> VertexId2LocalSize;
122 std::map<int,double> EdgeId2LocalSize;
123 std::map<int,double> FaceId2LocalSize;
124 std::map<int,double> SolidId2LocalSize;
126 std::vector<SMESHUtils::ControlPnt> ControlPoints;
127 std::set<int> ShapesWithControlPoints; // <-- allows calling SetLocalSize() several times w/o recomputing ControlPoints
129 //=============================================================================
133 //=============================================================================
135 NETGENPlugin_Mesher::NETGENPlugin_Mesher (SMESH_Mesh* mesh,
136 const TopoDS_Shape& aShape,
142 _fineness(NETGENPlugin_Hypothesis::GetDefaultFineness()),
143 _isViscousLayers2D(false),
152 SetDefaultParameters();
153 ShapesWithLocalSize.Clear();
154 VertexId2LocalSize.clear();
155 EdgeId2LocalSize.clear();
156 FaceId2LocalSize.clear();
157 SolidId2LocalSize.clear();
158 ControlPoints.clear();
159 ShapesWithControlPoints.clear();
162 //================================================================================
166 //================================================================================
168 NETGENPlugin_Mesher::~NETGENPlugin_Mesher()
176 //================================================================================
178 * Set pointer to NETGENPlugin_Mesher* field of the holder, that will be
179 * nullified at destruction of this
181 //================================================================================
183 void NETGENPlugin_Mesher::SetSelfPointer( NETGENPlugin_Mesher ** ptr )
194 //================================================================================
196 * \brief Initialize global NETGEN parameters with default values
198 //================================================================================
200 void NETGENPlugin_Mesher::SetDefaultParameters()
202 netgen::MeshingParameters& mparams = netgen::mparam;
203 // maximal mesh edge size
204 mparams.maxh = 0;//NETGENPlugin_Hypothesis::GetDefaultMaxSize();
206 // minimal number of segments per edge
207 mparams.segmentsperedge = NETGENPlugin_Hypothesis::GetDefaultNbSegPerEdge();
208 // rate of growth of size between elements
209 mparams.grading = NETGENPlugin_Hypothesis::GetDefaultGrowthRate();
210 // safety factor for curvatures (elements per radius)
211 mparams.curvaturesafety = NETGENPlugin_Hypothesis::GetDefaultNbSegPerRadius();
212 // create elements of second order
213 mparams.secondorder = NETGENPlugin_Hypothesis::GetDefaultSecondOrder();
214 // quad-dominated surface meshing
218 mparams.quad = NETGENPlugin_Hypothesis_2D::GetDefaultQuadAllowed();
219 _fineness = NETGENPlugin_Hypothesis::GetDefaultFineness();
220 mparams.uselocalh = NETGENPlugin_Hypothesis::GetDefaultSurfaceCurvature();
221 netgen::merge_solids = NETGENPlugin_Hypothesis::GetDefaultFuseEdges();
224 //=============================================================================
228 //=============================================================================
230 void SetLocalSize(TopoDS_Shape GeomShape, double LocalSize)
232 if ( GeomShape.IsNull() ) return;
233 TopAbs_ShapeEnum GeomType = GeomShape.ShapeType();
234 if (GeomType == TopAbs_COMPOUND) {
235 for (TopoDS_Iterator it (GeomShape); it.More(); it.Next()) {
236 SetLocalSize(it.Value(), LocalSize);
241 if (! ShapesWithLocalSize.Contains(GeomShape))
242 key = ShapesWithLocalSize.Add(GeomShape);
244 key = ShapesWithLocalSize.FindIndex(GeomShape);
245 if (GeomType == TopAbs_VERTEX) {
246 VertexId2LocalSize[key] = LocalSize;
247 } else if (GeomType == TopAbs_EDGE) {
248 EdgeId2LocalSize[key] = LocalSize;
249 } else if (GeomType == TopAbs_FACE) {
250 FaceId2LocalSize[key] = LocalSize;
251 } else if (GeomType == TopAbs_SOLID) {
252 SolidId2LocalSize[key] = LocalSize;
256 //=============================================================================
258 * Pass parameters to NETGEN
260 //=============================================================================
261 void NETGENPlugin_Mesher::SetParameters(const NETGENPlugin_Hypothesis* hyp)
265 netgen::MeshingParameters& mparams = netgen::mparam;
266 // Initialize global NETGEN parameters:
267 // maximal mesh segment size
268 mparams.maxh = hyp->GetMaxSize();
269 // maximal mesh element linear size
270 mparams.minh = hyp->GetMinSize();
271 // minimal number of segments per edge
272 mparams.segmentsperedge = hyp->GetNbSegPerEdge();
273 // rate of growth of size between elements
274 mparams.grading = hyp->GetGrowthRate();
275 // safety factor for curvatures (elements per radius)
276 mparams.curvaturesafety = hyp->GetNbSegPerRadius();
277 // create elements of second order
278 mparams.secondorder = hyp->GetSecondOrder() ? 1 : 0;
279 // quad-dominated surface meshing
280 mparams.quad = hyp->GetQuadAllowed() ? 1 : 0;
281 _optimize = hyp->GetOptimize();
282 _fineness = hyp->GetFineness();
283 mparams.uselocalh = hyp->GetSurfaceCurvature();
284 netgen::merge_solids = hyp->GetFuseEdges();
287 mparams.meshsizefilename= hyp->GetMeshSizeFile().empty() ? 0 : hyp->GetMeshSizeFile().c_str();
289 SMESH_Gen_i* smeshGen_i = SMESH_Gen_i::GetSMESHGen();
291 const NETGENPlugin_Hypothesis::TLocalSize localSizes = hyp->GetLocalSizesAndEntries();
292 NETGENPlugin_Hypothesis::TLocalSize::const_iterator it = localSizes.begin();
293 for ( ; it != localSizes.end() ; it++)
295 std::string entry = (*it).first;
296 double val = (*it).second;
298 GEOM::GEOM_Object_var aGeomObj;
299 SALOMEDS::SObject_var aSObj = SMESH_Gen_i::getStudyServant()->FindObjectID( entry.c_str() );
300 if ( !aSObj->_is_nil() ) {
301 CORBA::Object_var obj = aSObj->GetObject();
302 aGeomObj = GEOM::GEOM_Object::_narrow(obj);
305 TopoDS_Shape S = smeshGen_i->GeomObjectToShape( aGeomObj.in() );
306 ::SetLocalSize(S, val);
311 //=============================================================================
313 * Pass simple parameters to NETGEN
315 //=============================================================================
317 void NETGENPlugin_Mesher::SetParameters(const NETGENPlugin_SimpleHypothesis_2D* hyp)
321 SetDefaultParameters();
324 //=============================================================================
326 * Link - a pair of integer numbers
328 //=============================================================================
332 Link(int _n1, int _n2) : n1(_n1), n2(_n2) {}
333 Link() : n1(0), n2(0) {}
334 bool Contains( int n ) const { return n == n1 || n == n2; }
335 bool IsConnected( const Link& other ) const
337 return (( Contains( other.n1 ) || Contains( other.n2 )) && ( this != &other ));
341 int HashCode(const Link& aLink, int aLimit)
343 return HashCode(aLink.n1 + aLink.n2, aLimit);
346 Standard_Boolean IsEqual(const Link& aLink1, const Link& aLink2)
348 return (( aLink1.n1 == aLink2.n1 && aLink1.n2 == aLink2.n2 ) ||
349 ( aLink1.n1 == aLink2.n2 && aLink1.n2 == aLink2.n1 ));
354 //================================================================================
356 * \brief return id of netgen point corresponding to SMDS node
358 //================================================================================
359 typedef map< const SMDS_MeshNode*, int > TNode2IdMap;
361 int ngNodeId( const SMDS_MeshNode* node,
362 netgen::Mesh& ngMesh,
363 TNode2IdMap& nodeNgIdMap)
365 int newNgId = ngMesh.GetNP() + 1;
367 TNode2IdMap::iterator node_id = nodeNgIdMap.insert( make_pair( node, newNgId )).first;
369 if ( node_id->second == newNgId)
371 #if defined(DUMP_SEGMENTS) || defined(DUMP_TRIANGLES)
372 cout << "Ng " << newNgId << " - " << node;
374 netgen::MeshPoint p( netgen::Point<3> (node->X(), node->Y(), node->Z()) );
375 ngMesh.AddPoint( p );
377 return node_id->second;
380 //================================================================================
382 * \brief Return computed EDGEs connected to the given one
384 //================================================================================
386 list< TopoDS_Edge > getConnectedEdges( const TopoDS_Edge& edge,
387 const TopoDS_Face& face,
388 const set< SMESH_subMesh* > & computedSM,
389 const SMESH_MesherHelper& helper,
390 map< SMESH_subMesh*, set< int > >& addedEdgeSM2Faces)
393 list< TopoDS_Edge > edges;
394 list< int > nbEdgesInWire;
395 /*int nbWires =*/ SMESH_Block::GetOrderedEdges( face, edges, nbEdgesInWire);
397 // find <edge> within <edges>
398 list< TopoDS_Edge >::iterator eItFwd = edges.begin();
399 for ( ; eItFwd != edges.end(); ++eItFwd )
400 if ( edge.IsSame( *eItFwd ))
402 if ( eItFwd == edges.end()) return list< TopoDS_Edge>();
404 if ( eItFwd->Orientation() >= TopAbs_INTERNAL )
406 // connected INTERNAL edges returned from GetOrderedEdges() are wrongly oriented
407 // so treat each INTERNAL edge separately
408 TopoDS_Edge e = *eItFwd;
410 edges.push_back( e );
414 // get all computed EDGEs connected to <edge>
416 list< TopoDS_Edge >::iterator eItBack = eItFwd, ePrev;
417 TopoDS_Vertex vCommon;
418 TopTools_MapOfShape eAdded; // map used not to add a seam edge twice to <edges>
421 // put edges before <edge> to <edges> back
422 while ( edges.begin() != eItFwd )
423 edges.splice( edges.end(), edges, edges.begin() );
427 while ( ++eItFwd != edges.end() )
429 SMESH_subMesh* sm = helper.GetMesh()->GetSubMesh( *eItFwd );
431 bool connected = TopExp::CommonVertex( *ePrev, *eItFwd, vCommon );
432 bool computed = sm->IsMeshComputed();
433 bool added = addedEdgeSM2Faces[ sm ].count( helper.GetSubShapeID() );
434 bool doubled = !eAdded.Add( *eItFwd );
435 bool orientOK = (( ePrev ->Orientation() < TopAbs_INTERNAL ) ==
436 ( eItFwd->Orientation() < TopAbs_INTERNAL ) );
437 if ( !connected || !computed || !orientOK || added || doubled )
439 // stop advancement; move edges from tail to head
440 while ( edges.back() != *ePrev )
441 edges.splice( edges.begin(), edges, --edges.end() );
447 while ( eItBack != edges.begin() )
451 SMESH_subMesh* sm = helper.GetMesh()->GetSubMesh( *eItBack );
453 bool connected = TopExp::CommonVertex( *ePrev, *eItBack, vCommon );
454 bool computed = sm->IsMeshComputed();
455 bool added = addedEdgeSM2Faces[ sm ].count( helper.GetSubShapeID() );
456 bool doubled = !eAdded.Add( *eItBack );
457 bool orientOK = (( ePrev ->Orientation() < TopAbs_INTERNAL ) ==
458 ( eItBack->Orientation() < TopAbs_INTERNAL ) );
459 if ( !connected || !computed || !orientOK || added || doubled)
462 edges.erase( edges.begin(), ePrev );
466 if ( edges.front() != edges.back() )
468 // assure that the 1st vertex is meshed
469 TopoDS_Edge eLast = edges.back();
470 while ( !SMESH_Algo::VertexNode( SMESH_MesherHelper::IthVertex( 0, edges.front()), helper.GetMeshDS())
472 edges.front() != eLast )
473 edges.splice( edges.end(), edges, edges.begin() );
478 //================================================================================
480 * \brief Make triangulation of a shape precise enough
482 //================================================================================
484 void updateTriangulation( const TopoDS_Shape& shape )
486 // static set< Poly_Triangulation* > updated;
488 // TopLoc_Location loc;
489 // TopExp_Explorer fExp( shape, TopAbs_FACE );
490 // for ( ; fExp.More(); fExp.Next() )
492 // Handle(Poly_Triangulation) triangulation =
493 // BRep_Tool::Triangulation ( TopoDS::Face( fExp.Current() ), loc);
494 // if ( triangulation.IsNull() ||
495 // updated.insert( triangulation.operator->() ).second )
497 // BRepTools::Clean (shape);
500 BRepMesh_IncrementalMesh e(shape, 0.01, true);
502 catch (Standard_Failure)
505 // updated.erase( triangulation.operator->() );
506 // triangulation = BRep_Tool::Triangulation ( TopoDS::Face( fExp.Current() ), loc);
507 // updated.insert( triangulation.operator->() );
511 //================================================================================
513 * \brief Returns a medium node either existing in SMESH of created by NETGEN
514 * \param [in] corner1 - corner node 1
515 * \param [in] corner2 - corner node 2
516 * \param [in] defaultMedium - the node created by NETGEN
517 * \param [in] helper - holder of medium nodes existing in SMESH
518 * \return const SMDS_MeshNode* - the result node
520 //================================================================================
522 const SMDS_MeshNode* mediumNode( const SMDS_MeshNode* corner1,
523 const SMDS_MeshNode* corner2,
524 const SMDS_MeshNode* defaultMedium,
525 const SMESH_MesherHelper* helper)
529 TLinkNodeMap::const_iterator l2n =
530 helper->GetTLinkNodeMap().find( SMESH_TLink( corner1, corner2 ));
531 if ( l2n != helper->GetTLinkNodeMap().end() )
532 defaultMedium = l2n->second;
534 return defaultMedium;
537 //================================================================================
539 * \brief Assure that mesh on given shapes is quadratic
541 //================================================================================
543 // void makeQuadratic( const TopTools_IndexedMapOfShape& shapes,
544 // SMESH_Mesh* mesh )
546 // for ( int i = 1; i <= shapes.Extent(); ++i )
548 // SMESHDS_SubMesh* smDS = mesh->GetMeshDS()->MeshElements( shapes(i) );
549 // if ( !smDS ) continue;
550 // SMDS_ElemIteratorPtr elemIt = smDS->GetElements();
551 // if ( !elemIt->more() ) continue;
552 // const SMDS_MeshElement* e = elemIt->next();
553 // if ( !e || e->IsQuadratic() )
556 // TIDSortedElemSet elems;
557 // elems.insert( e );
558 // while ( elemIt->more() )
559 // elems.insert( elems.end(), elemIt->next() );
561 // SMESH_MeshEditor( mesh ).ConvertToQuadratic( /*3d=*/false, elems, /*biQuad=*/false );
565 //================================================================================
567 * \brief Restrict size of elements on the given edge
569 //================================================================================
571 void setLocalSize(const TopoDS_Edge& edge,
575 if ( size <= std::numeric_limits<double>::min() )
577 Standard_Real u1, u2;
578 Handle(Geom_Curve) curve = BRep_Tool::Curve(edge, u1, u2);
579 if ( curve.IsNull() )
581 TopoDS_Iterator vIt( edge );
582 if ( !vIt.More() ) return;
583 gp_Pnt p = BRep_Tool::Pnt( TopoDS::Vertex( vIt.Value() ));
584 NETGENPlugin_Mesher::RestrictLocalSize( mesh, p.XYZ(), size );
588 const int nb = (int)( 1.5 * SMESH_Algo::EdgeLength( edge ) / size );
589 Standard_Real delta = (u2-u1)/nb;
590 for(int i=0; i<nb; i++)
592 Standard_Real u = u1 + delta*i;
593 gp_Pnt p = curve->Value(u);
594 NETGENPlugin_Mesher::RestrictLocalSize( mesh, p.XYZ(), size );
595 netgen::Point3d pi(p.X(), p.Y(), p.Z());
596 double resultSize = mesh.GetH(pi);
597 if ( resultSize - size > 0.1*size )
598 // netgen does restriction iff oldH/newH > 1.2 (localh.cpp:136)
599 NETGENPlugin_Mesher::RestrictLocalSize( mesh, p.XYZ(), resultSize/1.201 );
605 //================================================================================
607 * \brief Set local size on shapes defined by SetParameters()
609 //================================================================================
611 void NETGENPlugin_Mesher::SetLocalSize( netgen::OCCGeometry& occgeo,
612 netgen::Mesh& ngMesh )
614 for(std::map<int,double>::const_iterator it=EdgeId2LocalSize.begin(); it!=EdgeId2LocalSize.end(); it++)
616 int key = (*it).first;
617 double hi = (*it).second;
618 const TopoDS_Shape& shape = ShapesWithLocalSize.FindKey(key);
619 setLocalSize( TopoDS::Edge(shape), hi, ngMesh );
621 for(std::map<int,double>::const_iterator it=VertexId2LocalSize.begin(); it!=VertexId2LocalSize.end(); it++)
623 int key = (*it).first;
624 double hi = (*it).second;
625 const TopoDS_Shape& shape = ShapesWithLocalSize.FindKey(key);
626 gp_Pnt p = BRep_Tool::Pnt( TopoDS::Vertex(shape) );
627 NETGENPlugin_Mesher::RestrictLocalSize( ngMesh, p.XYZ(), hi );
629 for(map<int,double>::const_iterator it=FaceId2LocalSize.begin(); it!=FaceId2LocalSize.end(); it++)
631 int key = (*it).first;
632 double val = (*it).second;
633 const TopoDS_Shape& shape = ShapesWithLocalSize.FindKey(key);
634 int faceNgID = occgeo.fmap.FindIndex(shape);
637 occgeo.SetFaceMaxH(faceNgID, val);
638 for ( TopExp_Explorer edgeExp( shape, TopAbs_EDGE ); edgeExp.More(); edgeExp.Next() )
639 setLocalSize( TopoDS::Edge( edgeExp.Current() ), val, ngMesh );
641 else if ( !ShapesWithControlPoints.count( key ))
643 SMESHUtils::createPointsSampleFromFace( TopoDS::Face( shape ), val, ControlPoints );
644 ShapesWithControlPoints.insert( key );
647 for(map<int,double>::const_iterator it=SolidId2LocalSize.begin(); it!=SolidId2LocalSize.end(); it++)
649 int key = (*it).first;
650 double val = (*it).second;
651 if ( !ShapesWithControlPoints.count( key ))
653 const TopoDS_Shape& shape = ShapesWithLocalSize.FindKey(key);
654 SMESHUtils::createPointsSampleFromSolid( TopoDS::Solid( shape ), val, ControlPoints );
655 ShapesWithControlPoints.insert( key );
659 if ( !ControlPoints.empty() )
661 for ( size_t i = 0; i < ControlPoints.size(); ++i )
662 NETGENPlugin_Mesher::RestrictLocalSize( ngMesh, ControlPoints[i].XYZ(), ControlPoints[i].Size() );
666 //================================================================================
668 * \brief Initialize netgen::OCCGeometry with OCCT shape
670 //================================================================================
672 void NETGENPlugin_Mesher::PrepareOCCgeometry(netgen::OCCGeometry& occgeo,
673 const TopoDS_Shape& shape,
675 list< SMESH_subMesh* > * meshedSM,
676 NETGENPlugin_Internals* intern)
678 updateTriangulation( shape );
681 BRepBndLib::Add (shape, bb);
682 double x1,y1,z1,x2,y2,z2;
683 bb.Get (x1,y1,z1,x2,y2,z2);
684 netgen::Point<3> p1 = netgen::Point<3> (x1,y1,z1);
685 netgen::Point<3> p2 = netgen::Point<3> (x2,y2,z2);
686 occgeo.boundingbox = netgen::Box<3> (p1,p2);
688 occgeo.shape = shape;
691 // fill maps of shapes of occgeo with not yet meshed subshapes
693 // get root submeshes
694 list< SMESH_subMesh* > rootSM;
695 const int shapeID = mesh.GetMeshDS()->ShapeToIndex( shape );
696 if ( shapeID > 0 ) { // SMESH_subMesh with ID 0 may exist, don't use it!
697 rootSM.push_back( mesh.GetSubMesh( shape ));
700 for ( TopoDS_Iterator it( shape ); it.More(); it.Next() )
701 rootSM.push_back( mesh.GetSubMesh( it.Value() ));
706 // add subshapes of empty submeshes
707 list< SMESH_subMesh* >::iterator rootIt = rootSM.begin(), rootEnd = rootSM.end();
708 for ( ; rootIt != rootEnd; ++rootIt ) {
709 SMESH_subMesh * root = *rootIt;
710 SMESH_subMeshIteratorPtr smIt = root->getDependsOnIterator(/*includeSelf=*/true,
711 /*complexShapeFirst=*/true);
712 // to find a right orientation of subshapes (PAL20462)
713 TopTools_IndexedMapOfShape subShapes;
714 TopExp::MapShapes(root->GetSubShape(), subShapes);
715 while ( smIt->more() )
717 SMESH_subMesh* sm = smIt->next();
718 TopoDS_Shape shape = sm->GetSubShape();
719 totNbFaces += ( shape.ShapeType() == TopAbs_FACE );
720 if ( intern && intern->isShapeToPrecompute( shape ))
722 if ( !meshedSM || sm->IsEmpty() )
724 if ( shape.ShapeType() != TopAbs_VERTEX )
725 shape = subShapes( subShapes.FindIndex( shape ));// shape -> index -> oriented shape
726 if ( shape.Orientation() >= TopAbs_INTERNAL )
727 shape.Orientation( TopAbs_FORWARD ); // isuue 0020676
728 switch ( shape.ShapeType() ) {
729 case TopAbs_FACE : occgeo.fmap.Add( shape ); break;
730 case TopAbs_EDGE : occgeo.emap.Add( shape ); break;
731 case TopAbs_VERTEX: occgeo.vmap.Add( shape ); break;
732 case TopAbs_SOLID :occgeo.somap.Add( shape ); break;
736 // collect submeshes of meshed shapes
739 const int dim = SMESH_Gen::GetShapeDim( shape );
740 meshedSM[ dim ].push_back( sm );
744 occgeo.facemeshstatus.SetSize (totNbFaces);
745 occgeo.facemeshstatus = 0;
746 occgeo.face_maxh_modified.SetSize(totNbFaces);
747 occgeo.face_maxh_modified = 0;
748 occgeo.face_maxh.SetSize(totNbFaces);
749 occgeo.face_maxh = netgen::mparam.maxh;
752 //================================================================================
754 * \brief Return a default min size value suitable for the given geometry.
756 //================================================================================
758 double NETGENPlugin_Mesher::GetDefaultMinSize(const TopoDS_Shape& geom,
759 const double maxSize)
761 updateTriangulation( geom );
765 const int* pi[4] = { &i1, &i2, &i3, &i1 };
768 TopExp_Explorer fExp( geom, TopAbs_FACE );
769 for ( ; fExp.More(); fExp.Next() )
771 Handle(Poly_Triangulation) triangulation =
772 BRep_Tool::Triangulation ( TopoDS::Face( fExp.Current() ), loc);
773 if ( triangulation.IsNull() ) continue;
774 const double fTol = BRep_Tool::Tolerance( TopoDS::Face( fExp.Current() ));
775 const TColgp_Array1OfPnt& points = triangulation->Nodes();
776 const Poly_Array1OfTriangle& trias = triangulation->Triangles();
777 for ( int iT = trias.Lower(); iT <= trias.Upper(); ++iT )
779 trias(iT).Get( i1, i2, i3 );
780 for ( int j = 0; j < 3; ++j )
782 double dist2 = points(*pi[j]).SquareDistance( points( *pi[j+1] ));
783 if ( dist2 < minh && fTol*fTol < dist2 )
785 bb.Add( points(*pi[j]));
789 if ( minh > 0.25 * bb.SquareExtent() ) // simple geometry, rough triangulation
791 minh = 1e-3 * sqrt( bb.SquareExtent());
792 //cout << "BND BOX minh = " <<minh << endl;
796 minh = 3 * sqrt( minh ); // triangulation for visualization is rather fine
797 //cout << "TRIANGULATION minh = " <<minh << endl;
799 if ( minh > 0.5 * maxSize )
805 //================================================================================
807 * \brief Restrict size of elements at a given point
809 //================================================================================
811 void NETGENPlugin_Mesher::RestrictLocalSize(netgen::Mesh& ngMesh,
814 const bool overrideMinH)
816 if ( size <= std::numeric_limits<double>::min() )
818 if ( netgen::mparam.minh > size )
822 ngMesh.SetMinimalH( size );
823 netgen::mparam.minh = size;
827 size = netgen::mparam.minh;
830 netgen::Point3d pi(p.X(), p.Y(), p.Z());
831 ngMesh.RestrictLocalH( pi, size );
834 //================================================================================
836 * \brief fill ngMesh with nodes and elements of computed submeshes
838 //================================================================================
840 bool NETGENPlugin_Mesher::FillNgMesh(netgen::OCCGeometry& occgeom,
841 netgen::Mesh& ngMesh,
842 vector<const SMDS_MeshNode*>& nodeVec,
843 const list< SMESH_subMesh* > & meshedSM,
844 SMESH_MesherHelper* quadHelper,
845 SMESH_ProxyMesh::Ptr proxyMesh)
847 TNode2IdMap nodeNgIdMap;
848 for ( size_t i = 1; i < nodeVec.size(); ++i )
849 nodeNgIdMap.insert( make_pair( nodeVec[i], i ));
851 TopTools_MapOfShape visitedShapes;
852 map< SMESH_subMesh*, set< int > > visitedEdgeSM2Faces;
853 set< SMESH_subMesh* > computedSM( meshedSM.begin(), meshedSM.end() );
855 SMESH_MesherHelper helper (*_mesh);
857 int faceNgID = ngMesh.GetNFD();
859 list< SMESH_subMesh* >::const_iterator smIt, smEnd = meshedSM.end();
860 for ( smIt = meshedSM.begin(); smIt != smEnd; ++smIt )
862 SMESH_subMesh* sm = *smIt;
863 if ( !visitedShapes.Add( sm->GetSubShape() ))
866 const SMESHDS_SubMesh * smDS = sm->GetSubMeshDS();
867 if ( !smDS ) continue;
869 switch ( sm->GetSubShape().ShapeType() )
871 case TopAbs_EDGE: { // EDGE
872 // ----------------------
873 TopoDS_Edge geomEdge = TopoDS::Edge( sm->GetSubShape() );
874 if ( geomEdge.Orientation() >= TopAbs_INTERNAL )
875 geomEdge.Orientation( TopAbs_FORWARD ); // issue 0020676
877 // Add ng segments for each not meshed FACE the EDGE bounds
878 PShapeIteratorPtr fIt = helper.GetAncestors( geomEdge, *sm->GetFather(), TopAbs_FACE );
879 while ( const TopoDS_Shape * anc = fIt->next() )
881 faceNgID = occgeom.fmap.FindIndex( *anc );
883 continue; // meshed face
885 int faceSMDSId = helper.GetMeshDS()->ShapeToIndex( *anc );
886 if ( visitedEdgeSM2Faces[ sm ].count( faceSMDSId ))
887 continue; // already treated EDGE
889 TopoDS_Face face = TopoDS::Face( occgeom.fmap( faceNgID ));
890 if ( face.Orientation() >= TopAbs_INTERNAL )
891 face.Orientation( TopAbs_FORWARD ); // issue 0020676
893 // get all meshed EDGEs of the FACE connected to geomEdge (issue 0021140)
894 helper.SetSubShape( face );
895 list< TopoDS_Edge > edges = getConnectedEdges( geomEdge, face, computedSM, helper,
896 visitedEdgeSM2Faces );
898 continue; // wrong ancestor?
900 // find out orientation of <edges> within <face>
901 TopoDS_Edge eNotSeam = edges.front();
902 if ( helper.HasSeam() )
904 list< TopoDS_Edge >::iterator eIt = edges.begin();
905 while ( helper.IsRealSeam( *eIt )) ++eIt;
906 if ( eIt != edges.end() )
909 TopAbs_Orientation fOri = helper.GetSubShapeOri( face, eNotSeam );
910 bool isForwad = ( fOri == eNotSeam.Orientation() || fOri >= TopAbs_INTERNAL );
912 // get all nodes from connected <edges>
913 const bool isQuad = smDS->IsQuadratic();
914 StdMeshers_FaceSide fSide( face, edges, _mesh, isForwad, isQuad );
915 const vector<UVPtStruct>& points = fSide.GetUVPtStruct();
916 if ( points.empty() )
917 return false; // invalid node params?
918 int i, nbSeg = fSide.NbSegments();
920 // remember EDGEs of fSide to treat only once
921 for ( int iE = 0; iE < fSide.NbEdges(); ++iE )
922 visitedEdgeSM2Faces[ helper.GetMesh()->GetSubMesh( fSide.Edge(iE )) ].insert(faceSMDSId);
924 double otherSeamParam = 0;
929 int prevNgId = ngNodeId( points[0].node, ngMesh, nodeNgIdMap );
931 for ( i = 0; i < nbSeg; ++i )
933 const UVPtStruct& p1 = points[ i ];
934 const UVPtStruct& p2 = points[ i+1 ];
936 if ( p1.node->GetPosition()->GetTypeOfPosition() == SMDS_TOP_VERTEX ) //an EDGE begins
939 if ( helper.IsRealSeam( p1.node->getshapeId() ))
941 TopoDS_Edge e = fSide.Edge( fSide.EdgeIndex( 0.5 * ( p1.normParam + p2.normParam )));
942 isSeam = helper.IsRealSeam( e );
945 otherSeamParam = helper.GetOtherParam( helper.GetPeriodicIndex() & 1 ? p2.u : p2.v );
952 seg[1] = prevNgId = ngNodeId( p2.node, ngMesh, nodeNgIdMap );
953 // node param on curve
954 seg.epgeominfo[ 0 ].dist = p1.param;
955 seg.epgeominfo[ 1 ].dist = p2.param;
957 seg.epgeominfo[ 0 ].u = p1.u;
958 seg.epgeominfo[ 0 ].v = p1.v;
959 seg.epgeominfo[ 1 ].u = p2.u;
960 seg.epgeominfo[ 1 ].v = p2.v;
962 //geomEdge = fSide.Edge( fSide.EdgeIndex( 0.5 * ( p1.normParam + p2.normParam )));
963 //seg.epgeominfo[ 0 ].edgenr = seg.epgeominfo[ 1 ].edgenr = occgeom.emap.FindIndex( geomEdge );
965 //seg.epgeominfo[ iEnd ].edgenr = edgeID; // = geom.emap.FindIndex(edge);
966 seg.si = faceNgID; // = geom.fmap.FindIndex (face);
967 seg.edgenr = ngMesh.GetNSeg() + 1; // segment id
968 ngMesh.AddSegment (seg);
970 SMESH_TNodeXYZ np1( p1.node ), np2( p2.node );
971 RestrictLocalSize( ngMesh, 0.5*(np1+np2), (np1-np2).Modulus() );
974 cout << "Segment: " << seg.edgenr << " on SMESH face " << helper.GetMeshDS()->ShapeToIndex( face ) << endl
975 << "\tface index: " << seg.si << endl
976 << "\tp1: " << seg[0] << endl
977 << "\tp2: " << seg[1] << endl
978 << "\tp0 param: " << seg.epgeominfo[ 0 ].dist << endl
979 << "\tp0 uv: " << seg.epgeominfo[ 0 ].u <<", "<< seg.epgeominfo[ 0 ].v << endl
980 //<< "\tp0 edge: " << seg.epgeominfo[ 0 ].edgenr << endl
981 << "\tp1 param: " << seg.epgeominfo[ 1 ].dist << endl
982 << "\tp1 uv: " << seg.epgeominfo[ 1 ].u <<", "<< seg.epgeominfo[ 1 ].v << endl;
983 //<< "\tp1 edge: " << seg.epgeominfo[ 1 ].edgenr << endl;
987 if ( helper.GetPeriodicIndex() && 1 ) {
988 seg.epgeominfo[ 0 ].u = otherSeamParam;
989 seg.epgeominfo[ 1 ].u = otherSeamParam;
990 swap (seg.epgeominfo[0].v, seg.epgeominfo[1].v);
992 seg.epgeominfo[ 0 ].v = otherSeamParam;
993 seg.epgeominfo[ 1 ].v = otherSeamParam;
994 swap (seg.epgeominfo[0].u, seg.epgeominfo[1].u);
996 swap( seg[0], seg[1] );
997 swap( seg.epgeominfo[0].dist, seg.epgeominfo[1].dist );
998 seg.edgenr = ngMesh.GetNSeg() + 1; // segment id
999 ngMesh.AddSegment( seg );
1000 #ifdef DUMP_SEGMENTS
1001 cout << "Segment: " << seg.edgenr << endl
1002 << "\t is SEAM (reverse) of the previous. "
1003 << " Other " << (helper.GetPeriodicIndex() && 1 ? "U" : "V")
1004 << " = " << otherSeamParam << endl;
1007 else if ( fOri == TopAbs_INTERNAL )
1009 swap( seg[0], seg[1] );
1010 swap( seg.epgeominfo[0], seg.epgeominfo[1] );
1011 seg.edgenr = ngMesh.GetNSeg() + 1; // segment id
1012 ngMesh.AddSegment( seg );
1013 #ifdef DUMP_SEGMENTS
1014 cout << "Segment: " << seg.edgenr << endl << "\t is REVERSE of the previous" << endl;
1018 } // loop on geomEdge ancestors
1020 if ( quadHelper ) // remember medium nodes of sub-meshes
1022 SMDS_ElemIteratorPtr edges = smDS->GetElements();
1023 while ( edges->more() )
1025 const SMDS_MeshElement* e = edges->next();
1026 if ( !quadHelper->AddTLinks( static_cast< const SMDS_MeshEdge*>( e )))
1032 } // case TopAbs_EDGE
1034 case TopAbs_FACE: { // FACE
1035 // ----------------------
1036 const TopoDS_Face& geomFace = TopoDS::Face( sm->GetSubShape() );
1037 helper.SetSubShape( geomFace );
1038 bool isInternalFace = ( geomFace.Orientation() == TopAbs_INTERNAL );
1040 // Find solids the geomFace bounds
1041 int solidID1 = 0, solidID2 = 0;
1042 StdMeshers_QuadToTriaAdaptor* quadAdaptor =
1043 dynamic_cast<StdMeshers_QuadToTriaAdaptor*>( proxyMesh.get() );
1046 solidID1 = occgeom.somap.FindIndex( quadAdaptor->GetShape() );
1050 PShapeIteratorPtr solidIt = helper.GetAncestors( geomFace, *sm->GetFather(), TopAbs_SOLID);
1051 while ( const TopoDS_Shape * solid = solidIt->next() )
1053 int id = occgeom.somap.FindIndex ( *solid );
1054 if ( solidID1 && id != solidID1 ) solidID2 = id;
1058 // Add ng face descriptors of meshed faces
1060 ngMesh.AddFaceDescriptor( netgen::FaceDescriptor( faceNgID, solidID1, solidID2, 0 ));
1062 // if second oreder is required, even already meshed faces must be passed to NETGEN
1063 int fID = occgeom.fmap.Add( geomFace );
1064 if ( occgeom.facemeshstatus.Size() < fID ) occgeom.facemeshstatus.SetSize( fID );
1065 occgeom.facemeshstatus[ fID-1 ] = netgen::FACE_MESHED_OK;
1066 while ( fID < faceNgID ) // geomFace is already in occgeom.fmap, add a copy
1068 fID = occgeom.fmap.Add( BRepBuilderAPI_Copy( geomFace, /*copyGeom=*/false ));
1069 if ( occgeom.facemeshstatus.Size() < fID ) occgeom.facemeshstatus.SetSize( fID );
1070 occgeom.facemeshstatus[ fID-1 ] = netgen::FACE_MESHED_OK;
1072 // Problem with the second order in a quadrangular mesh remains.
1073 // 1) All quadrangles generated by NETGEN are moved to an inexistent face
1074 // by FillSMesh() (find "AddFaceDescriptor")
1075 // 2) Temporary triangles generated by StdMeshers_QuadToTriaAdaptor
1076 // are on faces where quadrangles were.
1077 // Due to these 2 points, wrong geom faces are used while conversion to quadratic
1078 // of the mentioned above quadrangles and triangles
1080 // Orient the face correctly in solidID1 (issue 0020206)
1081 bool reverse = false;
1083 TopoDS_Shape solid = occgeom.somap( solidID1 );
1084 TopAbs_Orientation faceOriInSolid = helper.GetSubShapeOri( solid, geomFace );
1085 if ( faceOriInSolid >= 0 )
1087 helper.IsReversedSubMesh( TopoDS::Face( geomFace.Oriented( faceOriInSolid )));
1090 // Add surface elements
1092 netgen::Element2d tri(3);
1093 tri.SetIndex( faceNgID );
1094 SMESH_TNodeXYZ xyz[3];
1096 #ifdef DUMP_TRIANGLES
1097 cout << "SMESH face " << helper.GetMeshDS()->ShapeToIndex( geomFace )
1098 << " internal="<<isInternalFace << endl;
1101 smDS = proxyMesh->GetSubMesh( geomFace );
1103 SMDS_ElemIteratorPtr faces = smDS->GetElements();
1104 while ( faces->more() )
1106 const SMDS_MeshElement* f = faces->next();
1107 if ( f->NbNodes() % 3 != 0 ) // not triangle
1109 PShapeIteratorPtr solidIt=helper.GetAncestors(geomFace,*sm->GetFather(),TopAbs_SOLID);
1110 if ( const TopoDS_Shape * solid = solidIt->next() )
1111 sm = _mesh->GetSubMesh( *solid );
1112 SMESH_ComputeErrorPtr& smError = sm->GetComputeError();
1113 smError.reset( new SMESH_ComputeError(COMPERR_BAD_INPUT_MESH,"Not triangle sub-mesh"));
1114 smError->myBadElements.push_back( f );
1118 for ( int i = 0; i < 3; ++i )
1120 const SMDS_MeshNode* node = f->GetNode( i ), * inFaceNode=0;
1123 // get node UV on face
1124 int shapeID = node->getshapeId();
1125 if ( helper.IsSeamShape( shapeID ))
1127 if ( helper.IsSeamShape( f->GetNodeWrap( i+1 )->getshapeId() ))
1128 inFaceNode = f->GetNodeWrap( i-1 );
1130 inFaceNode = f->GetNodeWrap( i+1 );
1132 gp_XY uv = helper.GetNodeUV( geomFace, node, inFaceNode );
1134 int ind = reverse ? 3-i : i+1;
1135 tri.GeomInfoPi(ind).u = uv.X();
1136 tri.GeomInfoPi(ind).v = uv.Y();
1137 tri.PNum (ind) = ngNodeId( node, ngMesh, nodeNgIdMap );
1140 // pass a triangle size to NG size-map
1141 double size = ( ( xyz[0] - xyz[1] ).Modulus() +
1142 ( xyz[1] - xyz[2] ).Modulus() +
1143 ( xyz[2] - xyz[0] ).Modulus() ) / 3;
1144 gp_XYZ gc = ( xyz[0] + xyz[1] + xyz[2] ) / 3;
1145 RestrictLocalSize( ngMesh, gc, size, /*overrideMinH=*/false );
1147 ngMesh.AddSurfaceElement (tri);
1148 #ifdef DUMP_TRIANGLES
1149 cout << tri << endl;
1152 if ( isInternalFace )
1154 swap( tri[1], tri[2] );
1155 ngMesh.AddSurfaceElement (tri);
1156 #ifdef DUMP_TRIANGLES
1157 cout << tri << endl;
1162 if ( quadHelper ) // remember medium nodes of sub-meshes
1164 SMDS_ElemIteratorPtr faces = smDS->GetElements();
1165 while ( faces->more() )
1167 const SMDS_MeshElement* f = faces->next();
1168 if ( !quadHelper->AddTLinks( static_cast< const SMDS_MeshFace*>( f )))
1174 } // case TopAbs_FACE
1176 case TopAbs_VERTEX: { // VERTEX
1177 // --------------------------
1178 // issue 0021405. Add node only if a VERTEX is shared by a not meshed EDGE,
1179 // else netgen removes a free node and nodeVector becomes invalid
1180 PShapeIteratorPtr ansIt = helper.GetAncestors( sm->GetSubShape(),
1184 while ( const TopoDS_Shape* e = ansIt->next() )
1186 SMESH_subMesh* eSub = helper.GetMesh()->GetSubMesh( *e );
1187 if (( toAdd = ( eSub->IsEmpty() && !SMESH_Algo::isDegenerated( TopoDS::Edge( *e )))))
1192 SMDS_NodeIteratorPtr nodeIt = smDS->GetNodes();
1193 if ( nodeIt->more() )
1194 ngNodeId( nodeIt->next(), ngMesh, nodeNgIdMap );
1200 } // loop on submeshes
1203 nodeVec.resize( ngMesh.GetNP() + 1 );
1204 TNode2IdMap::iterator node_NgId, nodeNgIdEnd = nodeNgIdMap.end();
1205 for ( node_NgId = nodeNgIdMap.begin(); node_NgId != nodeNgIdEnd; ++node_NgId)
1206 nodeVec[ node_NgId->second ] = node_NgId->first;
1211 //================================================================================
1213 * \brief Duplicate mesh faces on internal geom faces
1215 //================================================================================
1217 void NETGENPlugin_Mesher::FixIntFaces(const netgen::OCCGeometry& occgeom,
1218 netgen::Mesh& ngMesh,
1219 NETGENPlugin_Internals& internalShapes)
1221 SMESHDS_Mesh* meshDS = internalShapes.getMesh().GetMeshDS();
1223 // find ng indices of internal faces
1225 for ( int ngFaceID = 1; ngFaceID <= occgeom.fmap.Extent(); ++ngFaceID )
1227 int smeshID = meshDS->ShapeToIndex( occgeom.fmap( ngFaceID ));
1228 if ( internalShapes.isInternalShape( smeshID ))
1229 ngFaceIds.insert( ngFaceID );
1231 if ( !ngFaceIds.empty() )
1234 int i, nbFaces = ngMesh.GetNSE();
1235 for ( i = 1; i <= nbFaces; ++i)
1237 netgen::Element2d elem = ngMesh.SurfaceElement(i);
1238 if ( ngFaceIds.count( elem.GetIndex() ))
1240 swap( elem[1], elem[2] );
1241 ngMesh.AddSurfaceElement (elem);
1247 //================================================================================
1249 * \brief Tries to heal the mesh on a FACE. The FACE is supposed to be partially
1250 * meshed due to NETGEN failure
1251 * \param [in] occgeom - geometry
1252 * \param [in,out] ngMesh - the mesh to fix
1253 * \param [inout] faceID - ID of the FACE to fix the mesh on
1254 * \return bool - is mesh is or becomes OK
1256 //================================================================================
1258 bool NETGENPlugin_Mesher::FixFaceMesh(const netgen::OCCGeometry& occgeom,
1259 netgen::Mesh& ngMesh,
1262 // we address a case where the FACE is almost fully meshed except small holes
1263 // of usually triangular shape at FACE boundary (IPAL52861)
1265 // The case appeared to be not simple: holes only look triangular but
1266 // indeed are a self intersecting polygon. A reason of the bug was in coincident
1267 // NG points on a seam edge. But the code below is very nice, leave it for
1272 if ( occgeom.fmap.Extent() < faceID )
1274 //const TopoDS_Face& face = TopoDS::Face( occgeom.fmap( faceID ));
1276 // find free links on the FACE
1277 NCollection_Map<Link> linkMap;
1278 for ( int iF = 1; iF <= ngMesh.GetNSE(); ++iF )
1280 const netgen::Element2d& elem = ngMesh.SurfaceElement(iF);
1281 if ( faceID != elem.GetIndex() )
1283 int n0 = elem[ elem.GetNP() - 1 ];
1284 for ( int i = 0; i < elem.GetNP(); ++i )
1287 Link link( n0, n1 );
1288 if ( !linkMap.Add( link ))
1289 linkMap.Remove( link );
1293 // add/remove boundary links
1294 for ( int iSeg = 1; iSeg <= ngMesh.GetNSeg(); ++iSeg )
1296 const netgen::Segment& seg = ngMesh.LineSegment( iSeg );
1297 if ( seg.si != faceID ) // !edgeIDs.Contains( seg.edgenr ))
1299 Link link( seg[1], seg[0] ); // reverse!!!
1300 if ( !linkMap.Add( link ))
1301 linkMap.Remove( link );
1303 if ( linkMap.IsEmpty() )
1305 if ( linkMap.Extent() < 3 )
1308 // make triangles of the links
1310 netgen::Element2d tri(3);
1311 tri.SetIndex ( faceID );
1313 NCollection_Map<Link>::Iterator linkIt( linkMap );
1314 Link link1 = linkIt.Value();
1315 // look for a link connected to link1
1316 NCollection_Map<Link>::Iterator linkIt2 = linkIt;
1317 for ( linkIt2.Next(); linkIt2.More(); linkIt2.Next() )
1319 const Link& link2 = linkIt2.Value();
1320 if ( link2.IsConnected( link1 ))
1322 // look for a link connected to both link1 and link2
1323 NCollection_Map<Link>::Iterator linkIt3 = linkIt2;
1324 for ( linkIt3.Next(); linkIt3.More(); linkIt3.Next() )
1326 const Link& link3 = linkIt3.Value();
1327 if ( link3.IsConnected( link1 ) &&
1328 link3.IsConnected( link2 ) )
1333 tri[2] = ( link2.Contains( link1.n1 ) ? link2.n1 : link3.n1 );
1334 if ( tri[0] == tri[2] || tri[1] == tri[2] )
1336 ngMesh.AddSurfaceElement( tri );
1338 // prepare for the next tria search
1339 if ( linkMap.Extent() == 3 )
1341 linkMap.Remove( link3 );
1342 linkMap.Remove( link2 );
1344 linkMap.Remove( link1 );
1345 link1 = linkIt.Value();
1358 //================================================================================
1359 // define gp_XY_Subtracted pointer to function calling gp_XY::Subtracted(gp_XY)
1360 gp_XY_FunPtr(Subtracted);
1361 //gp_XY_FunPtr(Added);
1363 //================================================================================
1365 * \brief Evaluate distance between two 2d points along the surface
1367 //================================================================================
1369 double evalDist( const gp_XY& uv1,
1371 const Handle(Geom_Surface)& surf,
1372 const int stopHandler=-1)
1374 if ( stopHandler > 0 ) // continue recursion
1376 gp_XY mid = SMESH_MesherHelper::GetMiddleUV( surf, uv1, uv2 );
1377 return evalDist( uv1,mid, surf, stopHandler-1 ) + evalDist( mid,uv2, surf, stopHandler-1 );
1379 double dist3D = surf->Value( uv1.X(), uv1.Y() ).Distance( surf->Value( uv2.X(), uv2.Y() ));
1380 if ( stopHandler == 0 ) // stop recursion
1383 // start recursion if necessary
1384 double dist2D = SMESH_MesherHelper::ApplyIn2D(surf, uv1, uv2, gp_XY_Subtracted, 0).Modulus();
1385 if ( fabs( dist3D - dist2D ) < dist2D * 1e-10 )
1386 return dist3D; // equal parametrization of a planar surface
1388 return evalDist( uv1, uv2, surf, 3 ); // start recursion
1391 //================================================================================
1393 * \brief Data of vertex internal in geom face
1395 //================================================================================
1399 gp_XY uv; //!< UV in face parametric space
1400 int ngId; //!< ng id of corrsponding node
1401 gp_XY uvClose; //!< UV of closest boundary node
1402 int ngIdClose; //!< ng id of closest boundary node
1405 //================================================================================
1407 * \brief Data of vertex internal in solid
1409 //================================================================================
1413 int ngId; //!< ng id of corresponding node
1414 int ngIdClose; //!< ng id of closest 2d mesh element
1415 int ngIdCloseN; //!< ng id of closest node of the closest 2d mesh element
1418 inline double dist2(const netgen::MeshPoint& p1, const netgen::MeshPoint& p2)
1420 return gp_Pnt( NGPOINT_COORDS(p1)).SquareDistance( gp_Pnt( NGPOINT_COORDS(p2)));
1424 //================================================================================
1426 * \brief Make netgen take internal vertices in faces into account by adding
1427 * segments including internal vertices
1429 * This function works in supposition that 1D mesh is already computed in ngMesh
1431 //================================================================================
1433 void NETGENPlugin_Mesher::AddIntVerticesInFaces(const netgen::OCCGeometry& occgeom,
1434 netgen::Mesh& ngMesh,
1435 vector<const SMDS_MeshNode*>& nodeVec,
1436 NETGENPlugin_Internals& internalShapes)
1438 if ((int) nodeVec.size() < ngMesh.GetNP() )
1439 nodeVec.resize( ngMesh.GetNP(), 0 );
1441 SMESHDS_Mesh* meshDS = internalShapes.getMesh().GetMeshDS();
1442 SMESH_MesherHelper helper( internalShapes.getMesh() );
1444 const map<int,list<int> >& face2Vert = internalShapes.getFacesWithVertices();
1445 map<int,list<int> >::const_iterator f2v = face2Vert.begin();
1446 for ( ; f2v != face2Vert.end(); ++f2v )
1448 const TopoDS_Face& face = TopoDS::Face( meshDS->IndexToShape( f2v->first ));
1449 if ( face.IsNull() ) continue;
1450 int faceNgID = occgeom.fmap.FindIndex (face);
1451 if ( faceNgID < 0 ) continue;
1453 TopLoc_Location loc;
1454 Handle(Geom_Surface) surf = BRep_Tool::Surface(face,loc);
1456 helper.SetSubShape( face );
1457 helper.SetElementsOnShape( true );
1459 // Get data of internal vertices and add them to ngMesh
1461 multimap< double, TIntVData > dist2VData; // sort vertices by distance from boundary nodes
1463 int i, nbSegInit = ngMesh.GetNSeg();
1465 // boundary characteristics
1466 double totSegLen2D = 0;
1469 const list<int>& iVertices = f2v->second;
1470 list<int>::const_iterator iv = iVertices.begin();
1471 for ( int nbV = 0; iv != iVertices.end(); ++iv, nbV++ )
1474 // get node on vertex
1475 const TopoDS_Vertex V = TopoDS::Vertex( meshDS->IndexToShape( *iv ));
1476 const SMDS_MeshNode * nV = SMESH_Algo::VertexNode( V, meshDS );
1479 SMESH_subMesh* sm = helper.GetMesh()->GetSubMesh( V );
1480 sm->ComputeStateEngine( SMESH_subMesh::COMPUTE );
1481 nV = SMESH_Algo::VertexNode( V, meshDS );
1482 if ( !nV ) continue;
1485 netgen::MeshPoint mp( netgen::Point<3> (nV->X(), nV->Y(), nV->Z()) );
1486 ngMesh.AddPoint ( mp, 1, netgen::EDGEPOINT );
1487 vData.ngId = ngMesh.GetNP();
1488 nodeVec.push_back( nV );
1492 vData.uv = helper.GetNodeUV( face, nV, 0, &uvOK );
1493 if ( !uvOK ) helper.CheckNodeUV( face, nV, vData.uv, BRep_Tool::Tolerance(V),/*force=*/1);
1495 // loop on all segments of the face to find the node closest to vertex and to count
1496 // average segment 2d length
1497 double closeDist2 = numeric_limits<double>::max(), dist2;
1499 for (i = 1; i <= ngMesh.GetNSeg(); ++i)
1501 netgen::Segment & seg = ngMesh.LineSegment(i);
1502 if ( seg.si != faceNgID ) continue;
1504 for ( int iEnd = 0; iEnd < 2; ++iEnd)
1506 uv[iEnd].SetCoord( seg.epgeominfo[iEnd].u, seg.epgeominfo[iEnd].v );
1507 if ( ngIdLast == seg[ iEnd ] ) continue;
1508 dist2 = helper.ApplyIn2D(surf, uv[iEnd], vData.uv, gp_XY_Subtracted,0).SquareModulus();
1509 if ( dist2 < closeDist2 )
1510 vData.ngIdClose = seg[ iEnd ], vData.uvClose = uv[iEnd], closeDist2 = dist2;
1511 ngIdLast = seg[ iEnd ];
1515 totSegLen2D += helper.ApplyIn2D(surf, uv[0], uv[1], gp_XY_Subtracted, false).Modulus();
1519 dist2VData.insert( make_pair( closeDist2, vData ));
1522 if ( totNbSeg == 0 ) break;
1523 double avgSegLen2d = totSegLen2D / totNbSeg;
1525 // Loop on vertices to add segments
1527 multimap< double, TIntVData >::iterator dist_vData = dist2VData.begin();
1528 for ( ; dist_vData != dist2VData.end(); ++dist_vData )
1530 double closeDist2 = dist_vData->first, dist2;
1531 TIntVData & vData = dist_vData->second;
1533 // try to find more close node among segments added for internal vertices
1534 for (i = nbSegInit+1; i <= ngMesh.GetNSeg(); ++i)
1536 netgen::Segment & seg = ngMesh.LineSegment(i);
1537 if ( seg.si != faceNgID ) continue;
1539 for ( int iEnd = 0; iEnd < 2; ++iEnd)
1541 uv[iEnd].SetCoord( seg.epgeominfo[iEnd].u, seg.epgeominfo[iEnd].v );
1542 dist2 = helper.ApplyIn2D(surf, uv[iEnd], vData.uv, gp_XY_Subtracted,0).SquareModulus();
1543 if ( dist2 < closeDist2 )
1544 vData.ngIdClose = seg[ iEnd ], vData.uvClose = uv[iEnd], closeDist2 = dist2;
1547 // decide whether to use the closest node as the second end of segment or to
1548 // create a new point
1549 int segEnd1 = vData.ngId;
1550 int segEnd2 = vData.ngIdClose; // to use closest node
1551 gp_XY uvV = vData.uv, uvP = vData.uvClose;
1552 double segLenHint = ngMesh.GetH( ngMesh.Point( vData.ngId ));
1553 double nodeDist2D = sqrt( closeDist2 );
1554 double nodeDist3D = evalDist( vData.uv, vData.uvClose, surf );
1555 bool avgLenOK = ( avgSegLen2d < 0.75 * nodeDist2D );
1556 bool hintLenOK = ( segLenHint < 0.75 * nodeDist3D );
1557 //cout << "uvV " << uvV.X() <<","<<uvV.Y() << " ";
1558 if ( hintLenOK || avgLenOK )
1560 // create a point between the closest node and V
1563 double r = min( 0.5, ( hintLenOK ? segLenHint/nodeDist3D : avgSegLen2d/nodeDist2D ));
1564 // direction from V to closet node in 2D
1565 gp_Dir2d v2n( helper.ApplyIn2D(surf, uvP, uvV, gp_XY_Subtracted, false ));
1567 uvP = vData.uv + r * nodeDist2D * v2n.XY();
1568 gp_Pnt P = surf->Value( uvP.X(), uvP.Y() ).Transformed( loc );
1570 netgen::MeshPoint mp( netgen::Point<3> (P.X(), P.Y(), P.Z()));
1571 ngMesh.AddPoint ( mp, 1, netgen::EDGEPOINT );
1572 segEnd2 = ngMesh.GetNP();
1573 //cout << "Middle " << r << " uv " << uvP.X() << "," << uvP.Y() << "( " << ngMesh.Point(segEnd2).X()<<","<<ngMesh.Point(segEnd2).Y()<<","<<ngMesh.Point(segEnd2).Z()<<" )"<< endl;
1574 SMDS_MeshNode * nP = helper.AddNode(P.X(), P.Y(), P.Z());
1575 nodeVec.push_back( nP );
1577 //else cout << "at Node " << " uv " << uvP.X() << "," << uvP.Y() << endl;
1580 netgen::Segment seg;
1582 if ( segEnd1 > segEnd2 ) swap( segEnd1, segEnd2 ), swap( uvV, uvP );
1583 seg[0] = segEnd1; // ng node id
1584 seg[1] = segEnd2; // ng node id
1585 seg.edgenr = ngMesh.GetNSeg() + 1;// segment id
1588 seg.epgeominfo[ 0 ].dist = 0; // param on curve
1589 seg.epgeominfo[ 0 ].u = uvV.X();
1590 seg.epgeominfo[ 0 ].v = uvV.Y();
1591 seg.epgeominfo[ 1 ].dist = 1; // param on curve
1592 seg.epgeominfo[ 1 ].u = uvP.X();
1593 seg.epgeominfo[ 1 ].v = uvP.Y();
1595 // seg.epgeominfo[ 0 ].edgenr = 10; // = geom.emap.FindIndex(edge);
1596 // seg.epgeominfo[ 1 ].edgenr = 10; // = geom.emap.FindIndex(edge);
1598 ngMesh.AddSegment (seg);
1600 // add reverse segment
1601 swap( seg[0], seg[1] );
1602 swap( seg.epgeominfo[0], seg.epgeominfo[1] );
1603 seg.edgenr = ngMesh.GetNSeg() + 1; // segment id
1604 ngMesh.AddSegment (seg);
1610 //================================================================================
1612 * \brief Make netgen take internal vertices in solids into account by adding
1613 * faces including internal vertices
1615 * This function works in supposition that 2D mesh is already computed in ngMesh
1617 //================================================================================
1619 void NETGENPlugin_Mesher::AddIntVerticesInSolids(const netgen::OCCGeometry& occgeom,
1620 netgen::Mesh& ngMesh,
1621 vector<const SMDS_MeshNode*>& nodeVec,
1622 NETGENPlugin_Internals& internalShapes)
1624 #ifdef DUMP_TRIANGLES_SCRIPT
1625 // create a python script making a mesh containing triangles added for internal vertices
1626 ofstream py(DUMP_TRIANGLES_SCRIPT);
1627 py << "import SMESH"<< endl
1628 << "from salome.smesh import smeshBuilder"<<endl
1629 << "smesh = smeshBuilder.New()"<<endl
1630 << "m = smesh.Mesh(name='triangles')" << endl;
1632 if ((int) nodeVec.size() < ngMesh.GetNP() )
1633 nodeVec.resize( ngMesh.GetNP(), 0 );
1635 SMESHDS_Mesh* meshDS = internalShapes.getMesh().GetMeshDS();
1636 SMESH_MesherHelper helper( internalShapes.getMesh() );
1638 const map<int,list<int> >& so2Vert = internalShapes.getSolidsWithVertices();
1639 map<int,list<int> >::const_iterator s2v = so2Vert.begin();
1640 for ( ; s2v != so2Vert.end(); ++s2v )
1642 const TopoDS_Shape& solid = meshDS->IndexToShape( s2v->first );
1643 if ( solid.IsNull() ) continue;
1644 int solidNgID = occgeom.somap.FindIndex (solid);
1645 if ( solidNgID < 0 && !occgeom.somap.IsEmpty() ) continue;
1647 helper.SetSubShape( solid );
1648 helper.SetElementsOnShape( true );
1650 // find ng indices of faces within the solid
1652 for (TopExp_Explorer fExp(solid, TopAbs_FACE); fExp.More(); fExp.Next() )
1653 ngFaceIds.insert( occgeom.fmap.FindIndex( fExp.Current() ));
1654 if ( ngFaceIds.size() == 1 && *ngFaceIds.begin() == 0 )
1655 ngFaceIds.insert( 1 );
1657 // Get data of internal vertices and add them to ngMesh
1659 multimap< double, TIntVSoData > dist2VData; // sort vertices by distance from ng faces
1661 int i, nbFaceInit = ngMesh.GetNSE();
1663 // boundary characteristics
1664 double totSegLen = 0;
1667 const list<int>& iVertices = s2v->second;
1668 list<int>::const_iterator iv = iVertices.begin();
1669 for ( int nbV = 0; iv != iVertices.end(); ++iv, nbV++ )
1672 const TopoDS_Vertex V = TopoDS::Vertex( meshDS->IndexToShape( *iv ));
1674 // get node on vertex
1675 const SMDS_MeshNode * nV = SMESH_Algo::VertexNode( V, meshDS );
1678 SMESH_subMesh* sm = helper.GetMesh()->GetSubMesh( V );
1679 sm->ComputeStateEngine( SMESH_subMesh::COMPUTE );
1680 nV = SMESH_Algo::VertexNode( V, meshDS );
1681 if ( !nV ) continue;
1684 netgen::MeshPoint mpV( netgen::Point<3> (nV->X(), nV->Y(), nV->Z()) );
1685 ngMesh.AddPoint ( mpV, 1, netgen::FIXEDPOINT );
1686 vData.ngId = ngMesh.GetNP();
1687 nodeVec.push_back( nV );
1689 // loop on all 2d elements to find the one closest to vertex and to count
1690 // average segment length
1691 double closeDist2 = numeric_limits<double>::max(), avgDist2;
1692 for (i = 1; i <= ngMesh.GetNSE(); ++i)
1694 const netgen::Element2d& elem = ngMesh.SurfaceElement(i);
1695 if ( !ngFaceIds.count( elem.GetIndex() )) continue;
1697 multimap< double, int> dist2nID; // sort nodes of element by distance from V
1698 for ( int j = 0; j < elem.GetNP(); ++j)
1700 netgen::MeshPoint mp = ngMesh.Point( elem[j] );
1701 double d2 = dist2( mpV, mp );
1702 dist2nID.insert( make_pair( d2, elem[j] ));
1703 avgDist2 += d2 / elem.GetNP();
1705 totNbSeg++, totSegLen+= sqrt( dist2( mp, ngMesh.Point( elem[(j+1)%elem.GetNP()])));
1707 double dist = dist2nID.begin()->first; //avgDist2;
1708 if ( dist < closeDist2 )
1709 vData.ngIdClose= i, vData.ngIdCloseN= dist2nID.begin()->second, closeDist2= dist;
1711 dist2VData.insert( make_pair( closeDist2, vData ));
1714 if ( totNbSeg == 0 ) break;
1715 double avgSegLen = totSegLen / totNbSeg;
1717 // Loop on vertices to add triangles
1719 multimap< double, TIntVSoData >::iterator dist_vData = dist2VData.begin();
1720 for ( ; dist_vData != dist2VData.end(); ++dist_vData )
1722 double closeDist2 = dist_vData->first;
1723 TIntVSoData & vData = dist_vData->second;
1725 const netgen::MeshPoint& mpV = ngMesh.Point( vData.ngId );
1727 // try to find more close face among ones added for internal vertices
1728 for (i = nbFaceInit+1; i <= ngMesh.GetNSE(); ++i)
1730 double avgDist2 = 0;
1731 multimap< double, int> dist2nID;
1732 const netgen::Element2d& elem = ngMesh.SurfaceElement(i);
1733 for ( int j = 0; j < elem.GetNP(); ++j)
1735 double d = dist2( mpV, ngMesh.Point( elem[j] ));
1736 dist2nID.insert( make_pair( d, elem[j] ));
1737 avgDist2 += d / elem.GetNP();
1738 if ( avgDist2 < closeDist2 )
1739 vData.ngIdClose= i, vData.ngIdCloseN= dist2nID.begin()->second, closeDist2= avgDist2;
1742 // sort nodes of the closest face by angle with vector from V to the closest node
1743 const double tol = numeric_limits<double>::min();
1744 map< double, int > angle2ID;
1745 const netgen::Element2d& closeFace = ngMesh.SurfaceElement( vData.ngIdClose );
1746 netgen::MeshPoint mp[2];
1747 mp[0] = ngMesh.Point( vData.ngIdCloseN );
1748 gp_XYZ p1( NGPOINT_COORDS( mp[0] ));
1749 gp_XYZ pV( NGPOINT_COORDS( mpV ));
1750 gp_Vec v2p1( pV, p1 );
1751 double distN1 = v2p1.Magnitude();
1752 if ( distN1 <= tol ) continue;
1754 for ( int j = 0; j < closeFace.GetNP(); ++j)
1756 mp[1] = ngMesh.Point( closeFace[j] );
1757 gp_Vec v2p( pV, gp_Pnt( NGPOINT_COORDS( mp[1] )) );
1758 angle2ID.insert( make_pair( v2p1.Angle( v2p ), closeFace[j]));
1760 // get node with angle of 60 degrees or greater
1761 map< double, int >::iterator angle_id = angle2ID.lower_bound( 60. * M_PI / 180. );
1762 if ( angle_id == angle2ID.end() ) angle_id = --angle2ID.end();
1763 const double minAngle = 30. * M_PI / 180.;
1764 const double angle = angle_id->first;
1765 bool angleOK = ( angle > minAngle );
1767 // find points to create a triangle
1768 netgen::Element2d tri(3);
1770 tri[0] = vData.ngId;
1771 tri[1] = vData.ngIdCloseN; // to use the closest nodes
1772 tri[2] = angle_id->second; // to use the node with best angle
1774 // decide whether to use the closest node and the node with best angle or to create new ones
1775 for ( int isBestAngleN = 0; isBestAngleN < 2; ++isBestAngleN )
1777 bool createNew = !angleOK; //, distOK = true;
1779 int triInd = isBestAngleN ? 2 : 1;
1780 mp[isBestAngleN] = ngMesh.Point( tri[triInd] );
1785 double distN2 = sqrt( dist2( mpV, mp[isBestAngleN]));
1786 createNew = ( fabs( distN2 - distN1 ) > 0.25 * distN1 );
1788 else if ( angle < tol )
1790 v2p1.SetX( v2p1.X() + 1e-3 );
1796 double segLenHint = ngMesh.GetH( ngMesh.Point( vData.ngId ));
1797 bool avgLenOK = ( avgSegLen < 0.75 * distN1 );
1798 bool hintLenOK = ( segLenHint < 0.75 * distN1 );
1799 createNew = (createNew || avgLenOK || hintLenOK );
1800 // we create a new node not closer than 0.5 to the closest face
1801 // in order not to clash with other close face
1802 double r = min( 0.5, ( hintLenOK ? segLenHint : avgSegLen ) / distN1 );
1803 distFromV = r * distN1;
1807 // create a new point, between the node and the vertex if angleOK
1808 gp_XYZ p( NGPOINT_COORDS( mp[isBestAngleN] ));
1809 gp_Vec v2p( pV, p ); v2p.Normalize();
1810 if ( isBestAngleN && !angleOK )
1811 p = p1 + gp_Dir( v2p.XYZ() - v2p1.XYZ()).XYZ() * distN1 * 0.95;
1813 p = pV + v2p.XYZ() * distFromV;
1815 if ( !isBestAngleN ) p1 = p, distN1 = distFromV;
1817 mp[isBestAngleN].SetPoint( netgen::Point<3> (p.X(), p.Y(), p.Z()));
1818 ngMesh.AddPoint ( mp[isBestAngleN], 1, netgen::SURFACEPOINT );
1819 tri[triInd] = ngMesh.GetNP();
1820 nodeVec.push_back( helper.AddNode( p.X(), p.Y(), p.Z()) );
1823 ngMesh.AddSurfaceElement (tri);
1824 swap( tri[1], tri[2] );
1825 ngMesh.AddSurfaceElement (tri);
1827 #ifdef DUMP_TRIANGLES_SCRIPT
1828 py << "n1 = m.AddNode( "<< mpV(0)<<", "<< mpV(1)<<", "<< mpV(2)<<") "<< endl
1829 << "n2 = m.AddNode( "<< mp[0](0)<<", "<< mp[0](1)<<", "<< mp[0](2)<<") "<< endl
1830 << "n3 = m.AddNode( "<< mp[1](0)<<", "<< mp[1](1)<<", "<< mp[1](2)<<" )" << endl
1831 << "m.AddFace([n1,n2,n3])" << endl;
1833 } // loop on internal vertices of a solid
1835 } // loop on solids with internal vertices
1838 //================================================================================
1840 * \brief Fill netgen mesh with segments of a FACE
1841 * \param ngMesh - netgen mesh
1842 * \param geom - container of OCCT geometry to mesh
1843 * \param wires - data of nodes on FACE boundary
1844 * \param helper - mesher helper holding the FACE
1845 * \param nodeVec - vector of nodes in which node index == netgen ID
1846 * \retval SMESH_ComputeErrorPtr - error description
1848 //================================================================================
1850 SMESH_ComputeErrorPtr
1851 NETGENPlugin_Mesher::AddSegmentsToMesh(netgen::Mesh& ngMesh,
1852 netgen::OCCGeometry& geom,
1853 const TSideVector& wires,
1854 SMESH_MesherHelper& helper,
1855 vector< const SMDS_MeshNode* > & nodeVec,
1856 const bool overrideMinH)
1858 // ----------------------------
1859 // Check wires and count nodes
1860 // ----------------------------
1862 for ( size_t iW = 0; iW < wires.size(); ++iW )
1864 StdMeshers_FaceSidePtr wire = wires[ iW ];
1865 if ( wire->MissVertexNode() )
1867 // Commented for issue 0020960. It worked for the case, let's wait for case where it doesn't.
1868 // It seems that there is no reason for this limitation
1870 // (new SMESH_ComputeError(COMPERR_BAD_INPUT_MESH, "Missing nodes on vertices"));
1872 const vector<UVPtStruct>& uvPtVec = wire->GetUVPtStruct();
1873 if ((int) uvPtVec.size() != wire->NbPoints() )
1874 return SMESH_ComputeError::New(COMPERR_BAD_INPUT_MESH,
1875 SMESH_Comment("Unexpected nb of points on wire ") << iW
1876 << ": " << uvPtVec.size()<<" != "<<wire->NbPoints());
1877 nbNodes += wire->NbPoints();
1879 nodeVec.reserve( nodeVec.size() + nbNodes + 1 );
1880 if ( nodeVec.empty() )
1881 nodeVec.push_back( 0 );
1883 // -----------------
1885 // -----------------
1887 const bool wasNgMeshEmpty = ( ngMesh.GetNP() < 1 ); /* true => this method is called by
1888 NETGENPlugin_NETGEN_2D_ONLY */
1890 // map for nodes on vertices since they can be shared between wires
1891 // ( issue 0020676, face_int_box.brep) and nodes built by NETGEN
1892 map<const SMDS_MeshNode*, int > node2ngID;
1893 if ( !wasNgMeshEmpty ) // fill node2ngID with nodes built by NETGEN
1895 set< int > subIDs; // ids of sub-shapes of the FACE
1896 for ( size_t iW = 0; iW < wires.size(); ++iW )
1898 StdMeshers_FaceSidePtr wire = wires[ iW ];
1899 for ( int iE = 0, nbE = wire->NbEdges(); iE < nbE; ++iE )
1901 subIDs.insert( wire->EdgeID( iE ));
1902 subIDs.insert( helper.GetMeshDS()->ShapeToIndex( wire->FirstVertex( iE )));
1905 for ( size_t ngID = 1; ngID < nodeVec.size(); ++ngID )
1906 if ( subIDs.count( nodeVec[ngID]->getshapeId() ))
1907 node2ngID.insert( make_pair( nodeVec[ngID], ngID ));
1910 const int solidID = 0, faceID = geom.fmap.FindIndex( helper.GetSubShape() );
1911 if ( ngMesh.GetNFD() < 1 )
1912 ngMesh.AddFaceDescriptor( netgen::FaceDescriptor( faceID, solidID, solidID, 0 ));
1914 for ( size_t iW = 0; iW < wires.size(); ++iW )
1916 StdMeshers_FaceSidePtr wire = wires[ iW ];
1917 const vector<UVPtStruct>& uvPtVec = wire->GetUVPtStruct();
1918 const int nbSegments = wire->NbPoints() - 1;
1920 // assure the 1st node to be in node2ngID, which is needed to correctly
1921 // "close chain of segments" (see below) in case if the 1st node is not
1922 // onVertex because it is on a Viscous layer
1923 node2ngID.insert( make_pair( uvPtVec[ 0 ].node, ngMesh.GetNP() + 1 ));
1925 // compute length of every segment
1926 vector<double> segLen( nbSegments );
1927 for ( int i = 0; i < nbSegments; ++i )
1928 segLen[i] = SMESH_TNodeXYZ( uvPtVec[ i ].node ).Distance( uvPtVec[ i+1 ].node );
1930 int edgeID = 1, posID = -2;
1931 bool isInternalWire = false;
1932 double vertexNormPar = 0;
1933 const int prevNbNGSeg = ngMesh.GetNSeg();
1934 for ( int i = 0; i < nbSegments; ++i ) // loop on segments
1936 // Add the first point of a segment
1938 const SMDS_MeshNode * n = uvPtVec[ i ].node;
1939 const int posShapeID = n->getshapeId();
1940 bool onVertex = ( n->GetPosition()->GetTypeOfPosition() == SMDS_TOP_VERTEX );
1941 bool onEdge = ( n->GetPosition()->GetTypeOfPosition() == SMDS_TOP_EDGE );
1943 // skip nodes on degenerated edges
1944 if ( helper.IsDegenShape( posShapeID ) &&
1945 helper.IsDegenShape( uvPtVec[ i+1 ].node->getshapeId() ))
1948 int ngID1 = ngMesh.GetNP() + 1, ngID2 = ngID1+1;
1949 if ( onVertex || ( !wasNgMeshEmpty && onEdge ) || helper.IsRealSeam( posShapeID ))
1950 ngID1 = node2ngID.insert( make_pair( n, ngID1 )).first->second;
1951 if ( ngID1 > ngMesh.GetNP() )
1953 netgen::MeshPoint mp( netgen::Point<3> (n->X(), n->Y(), n->Z()) );
1954 ngMesh.AddPoint ( mp, 1, netgen::EDGEPOINT );
1955 nodeVec.push_back( n );
1957 else // n is in ngMesh already, and ngID2 in prev segment is wrong
1959 ngID2 = ngMesh.GetNP() + 1;
1960 if ( i > 0 ) // prev segment belongs to same wire
1962 netgen::Segment& prevSeg = ngMesh.LineSegment( ngMesh.GetNSeg() );
1969 netgen::Segment seg;
1971 seg[0] = ngID1; // ng node id
1972 seg[1] = ngID2; // ng node id
1973 seg.edgenr = ngMesh.GetNSeg() + 1; // ng segment id
1974 seg.si = faceID; // = geom.fmap.FindIndex (face);
1976 for ( int iEnd = 0; iEnd < 2; ++iEnd)
1978 const UVPtStruct& pnt = uvPtVec[ i + iEnd ];
1980 seg.epgeominfo[ iEnd ].dist = pnt.param; // param on curve
1981 seg.epgeominfo[ iEnd ].u = pnt.u;
1982 seg.epgeominfo[ iEnd ].v = pnt.v;
1984 // find out edge id and node parameter on edge
1985 onVertex = ( pnt.normParam + 1e-10 > vertexNormPar );
1986 if ( onVertex || posShapeID != posID )
1989 double normParam = pnt.normParam;
1991 normParam = 0.5 * ( uvPtVec[ i ].normParam + uvPtVec[ i+1 ].normParam );
1992 int edgeIndexInWire = wire->EdgeIndex( normParam );
1993 vertexNormPar = wire->LastParameter( edgeIndexInWire );
1994 const TopoDS_Edge& edge = wire->Edge( edgeIndexInWire );
1995 edgeID = geom.emap.FindIndex( edge );
1997 isInternalWire = ( edge.Orientation() == TopAbs_INTERNAL );
1998 // if ( onVertex ) // param on curve is different on each of two edges
1999 // seg.epgeominfo[ iEnd ].dist = helper.GetNodeU( edge, pnt.node );
2001 seg.epgeominfo[ iEnd ].edgenr = edgeID; // = geom.emap.FindIndex(edge);
2004 ngMesh.AddSegment (seg);
2006 // restrict size of elements near the segment
2007 SMESH_TNodeXYZ np1( n ), np2( uvPtVec[ i+1 ].node );
2008 // get an average size of adjacent segments to avoid sharp change of
2009 // element size (regression on issue 0020452, note 0010898)
2010 int iPrev = SMESH_MesherHelper::WrapIndex( i-1, nbSegments );
2011 int iNext = SMESH_MesherHelper::WrapIndex( i+1, nbSegments );
2012 double sumH = segLen[ iPrev ] + segLen[ i ] + segLen[ iNext ];
2013 int nbSeg = ( int( segLen[ iPrev ] > sumH / 100.) +
2014 int( segLen[ i ] > sumH / 100.) +
2015 int( segLen[ iNext ] > sumH / 100.));
2017 RestrictLocalSize( ngMesh, 0.5*(np1+np2), sumH / nbSeg, overrideMinH );
2019 if ( isInternalWire )
2021 swap (seg[0], seg[1]);
2022 swap( seg.epgeominfo[0], seg.epgeominfo[1] );
2023 seg.edgenr = ngMesh.GetNSeg() + 1; // segment id
2024 ngMesh.AddSegment (seg);
2026 } // loop on segments on a wire
2028 // close chain of segments
2029 if ( nbSegments > 0 )
2031 netgen::Segment& lastSeg = ngMesh.LineSegment( ngMesh.GetNSeg() - int( isInternalWire ));
2032 const SMDS_MeshNode * lastNode = uvPtVec.back().node;
2033 lastSeg[1] = node2ngID.insert( make_pair( lastNode, lastSeg[1] )).first->second;
2034 if ( lastSeg[1] > ngMesh.GetNP() )
2036 netgen::MeshPoint mp( netgen::Point<3> (lastNode->X(), lastNode->Y(), lastNode->Z()) );
2037 ngMesh.AddPoint ( mp, 1, netgen::EDGEPOINT );
2038 nodeVec.push_back( lastNode );
2040 if ( isInternalWire )
2042 netgen::Segment& realLastSeg = ngMesh.LineSegment( ngMesh.GetNSeg() );
2043 realLastSeg[0] = lastSeg[1];
2047 #ifdef DUMP_SEGMENTS
2048 cout << "BEGIN WIRE " << iW << endl;
2049 for ( int i = prevNbNGSeg+1; i <= ngMesh.GetNSeg(); ++i )
2051 netgen::Segment& seg = ngMesh.LineSegment( i );
2053 netgen::Segment& prevSeg = ngMesh.LineSegment( i-1 );
2054 if ( seg[0] == prevSeg[1] && seg[1] == prevSeg[0] )
2056 cout << "Segment: " << seg.edgenr << endl << "\tis REVRESE of the previous one" << endl;
2060 cout << "Segment: " << seg.edgenr << endl
2061 << "\tp1: " << seg[0] << " n" << nodeVec[ seg[0]]->GetID() << endl
2062 << "\tp2: " << seg[1] << " n" << nodeVec[ seg[1]]->GetID() << endl
2063 << "\tp0 param: " << seg.epgeominfo[ 0 ].dist << endl
2064 << "\tp0 uv: " << seg.epgeominfo[ 0 ].u <<", "<< seg.epgeominfo[ 0 ].v << endl
2065 << "\tp0 edge: " << seg.epgeominfo[ 0 ].edgenr << endl
2066 << "\tp1 param: " << seg.epgeominfo[ 1 ].dist << endl
2067 << "\tp1 uv: " << seg.epgeominfo[ 1 ].u <<", "<< seg.epgeominfo[ 1 ].v << endl
2068 << "\tp1 edge: " << seg.epgeominfo[ 1 ].edgenr << endl;
2070 cout << "--END WIRE " << iW << endl;
2072 SMESH_Comment __not_unused_variable( prevNbNGSeg );
2075 } // loop on WIREs of a FACE
2077 // add a segment instead of an internal vertex
2078 if ( wasNgMeshEmpty )
2080 NETGENPlugin_Internals intShapes( *helper.GetMesh(), helper.GetSubShape(), /*is3D=*/false );
2081 AddIntVerticesInFaces( geom, ngMesh, nodeVec, intShapes );
2083 ngMesh.CalcSurfacesOfNode();
2088 //================================================================================
2090 * \brief Fill SMESH mesh according to contents of netgen mesh
2091 * \param occgeo - container of OCCT geometry to mesh
2092 * \param ngMesh - netgen mesh
2093 * \param initState - bn of entities in netgen mesh before computing
2094 * \param sMesh - SMESH mesh to fill in
2095 * \param nodeVec - vector of nodes in which node index == netgen ID
2096 * \param comment - returns problem description
2097 * \param quadHelper - holder of medium nodes of sub-meshes
2098 * \retval int - error
2100 //================================================================================
2102 int NETGENPlugin_Mesher::FillSMesh(const netgen::OCCGeometry& occgeo,
2103 netgen::Mesh& ngMesh,
2104 const NETGENPlugin_ngMeshInfo& initState,
2106 std::vector<const SMDS_MeshNode*>& nodeVec,
2107 SMESH_Comment& comment,
2108 SMESH_MesherHelper* quadHelper)
2110 int nbNod = ngMesh.GetNP();
2111 int nbSeg = ngMesh.GetNSeg();
2112 int nbFac = ngMesh.GetNSE();
2113 int nbVol = ngMesh.GetNE();
2115 SMESHDS_Mesh* meshDS = sMesh.GetMeshDS();
2117 // quadHelper is used for either
2118 // 1) making quadratic elements when a lower dimention mesh is loaded
2119 // to SMESH before convertion to quadratic by NETGEN
2120 // 2) sewing of quadratic elements with quadratic elements of sub-meshes
2121 if ( quadHelper && !quadHelper->GetIsQuadratic() && quadHelper->GetTLinkNodeMap().empty() )
2124 // -------------------------------------
2125 // Create and insert nodes into nodeVec
2126 // -------------------------------------
2128 nodeVec.resize( nbNod + 1 );
2129 int i, nbInitNod = initState._nbNodes;
2130 for (i = nbInitNod+1; i <= nbNod; ++i )
2132 const netgen::MeshPoint& ngPoint = ngMesh.Point(i);
2133 SMDS_MeshNode* node = NULL;
2134 TopoDS_Vertex aVert;
2135 // First, netgen creates nodes on vertices in occgeo.vmap,
2136 // so node index corresponds to vertex index
2137 // but (issue 0020776) netgen does not create nodes with equal coordinates
2138 if ( i-nbInitNod <= occgeo.vmap.Extent() )
2140 gp_Pnt p ( NGPOINT_COORDS(ngPoint) );
2141 for (int iV = i-nbInitNod; aVert.IsNull() && iV <= occgeo.vmap.Extent(); ++iV)
2143 aVert = TopoDS::Vertex( occgeo.vmap( iV ));
2144 gp_Pnt pV = BRep_Tool::Pnt( aVert );
2145 if ( p.SquareDistance( pV ) > 1e-20 )
2148 node = const_cast<SMDS_MeshNode*>( SMESH_Algo::VertexNode( aVert, meshDS ));
2151 if (!node) // node not found on vertex
2153 node = meshDS->AddNode( NGPOINT_COORDS( ngPoint ));
2154 if (!aVert.IsNull())
2155 meshDS->SetNodeOnVertex(node, aVert);
2160 // -------------------------------------------
2161 // Create mesh segments along geometric edges
2162 // -------------------------------------------
2164 int nbInitSeg = initState._nbSegments;
2165 for (i = nbInitSeg+1; i <= nbSeg; ++i )
2167 const netgen::Segment& seg = ngMesh.LineSegment(i);
2169 int pinds[3] = { seg.pnums[0], seg.pnums[1], seg.pnums[2] };
2172 for (int j=0; j < 3; ++j)
2174 int pind = pinds[j];
2175 if (pind <= 0 || !nodeVec_ACCESS(pind))
2183 int aGeomEdgeInd = seg.epgeominfo[j].edgenr;
2184 if (aGeomEdgeInd > 0 && aGeomEdgeInd <= occgeo.emap.Extent())
2185 aEdge = TopoDS::Edge(occgeo.emap(aGeomEdgeInd));
2187 param = seg.epgeominfo[j].dist;
2190 else // middle point
2192 param = param2 * 0.5;
2194 if (!aEdge.IsNull() && nodeVec_ACCESS(pind)->getshapeId() < 1)
2196 meshDS->SetNodeOnEdge(nodeVec_ACCESS(pind), aEdge, param);
2201 SMDS_MeshEdge* edge = 0;
2202 if (nbp == 2) // second order ?
2204 if ( meshDS->FindEdge( nodeVec_ACCESS(pinds[0]), nodeVec_ACCESS(pinds[1])))
2206 if ( quadHelper ) // final mesh must be quadratic
2207 edge = quadHelper->AddEdge(nodeVec_ACCESS(pinds[0]), nodeVec_ACCESS(pinds[1]));
2209 edge = meshDS->AddEdge(nodeVec_ACCESS(pinds[0]), nodeVec_ACCESS(pinds[1]));
2213 if ( meshDS->FindEdge( nodeVec_ACCESS(pinds[0]), nodeVec_ACCESS(pinds[1]),
2214 nodeVec_ACCESS(pinds[2])))
2216 edge = meshDS->AddEdge(nodeVec_ACCESS(pinds[0]), nodeVec_ACCESS(pinds[1]),
2217 nodeVec_ACCESS(pinds[2]));
2221 if ( comment.empty() ) comment << "Cannot create a mesh edge";
2222 MESSAGE("Cannot create a mesh edge");
2223 nbSeg = nbFac = nbVol = 0;
2226 if ( !aEdge.IsNull() && edge->getshapeId() < 1 )
2227 meshDS->SetMeshElementOnShape(edge, aEdge);
2229 else if ( comment.empty() )
2231 comment << "Invalid netgen segment #" << i;
2235 // ----------------------------------------
2236 // Create mesh faces along geometric faces
2237 // ----------------------------------------
2239 int nbInitFac = initState._nbFaces;
2240 int quadFaceID = ngMesh.GetNFD() + 1;
2241 if ( nbInitFac < nbFac )
2242 // add a faces descriptor to exclude qudrangle elements generated by NETGEN
2243 // from computation of 3D mesh
2244 ngMesh.AddFaceDescriptor (netgen::FaceDescriptor(quadFaceID, /*solid1=*/0, /*solid2=*/0, 0));
2246 vector<const SMDS_MeshNode*> nodes;
2247 for (i = nbInitFac+1; i <= nbFac; ++i )
2249 const netgen::Element2d& elem = ngMesh.SurfaceElement(i);
2250 const int aGeomFaceInd = elem.GetIndex();
2252 if (aGeomFaceInd > 0 && aGeomFaceInd <= occgeo.fmap.Extent())
2253 aFace = TopoDS::Face(occgeo.fmap(aGeomFaceInd));
2255 for ( int j = 1; j <= elem.GetNP(); ++j )
2257 int pind = elem.PNum(j);
2258 if ( pind < 1 || pind >= (int) nodeVec.size() )
2260 if ( SMDS_MeshNode* node = nodeVec_ACCESS(pind))
2262 nodes.push_back( node );
2263 if (!aFace.IsNull() && node->getshapeId() < 1)
2265 const netgen::PointGeomInfo& pgi = elem.GeomInfoPi(j);
2266 meshDS->SetNodeOnFace(node, aFace, pgi.u, pgi.v);
2270 if ((int) nodes.size() != elem.GetNP() )
2272 if ( comment.empty() )
2273 comment << "Invalid netgen 2d element #" << i;
2274 continue; // bad node ids
2276 SMDS_MeshFace* face = NULL;
2277 switch (elem.GetType())
2280 if ( quadHelper ) // final mesh must be quadratic
2281 face = quadHelper->AddFace(nodes[0],nodes[1],nodes[2]);
2283 face = meshDS->AddFace(nodes[0],nodes[1],nodes[2]);
2286 if ( quadHelper ) // final mesh must be quadratic
2287 face = quadHelper->AddFace(nodes[0],nodes[1],nodes[2],nodes[3]);
2289 face = meshDS->AddFace(nodes[0],nodes[1],nodes[2],nodes[3]);
2290 // exclude qudrangle elements from computation of 3D mesh
2291 const_cast< netgen::Element2d& >( elem ).SetIndex( quadFaceID );
2294 nodes[5] = mediumNode( nodes[0],nodes[1],nodes[5], quadHelper );
2295 nodes[3] = mediumNode( nodes[1],nodes[2],nodes[3], quadHelper );
2296 nodes[4] = mediumNode( nodes[2],nodes[0],nodes[4], quadHelper );
2297 face = meshDS->AddFace(nodes[0],nodes[1],nodes[2],nodes[5],nodes[3],nodes[4]);
2300 nodes[4] = mediumNode( nodes[0],nodes[1],nodes[4], quadHelper );
2301 nodes[7] = mediumNode( nodes[1],nodes[2],nodes[7], quadHelper );
2302 nodes[5] = mediumNode( nodes[2],nodes[3],nodes[5], quadHelper );
2303 nodes[6] = mediumNode( nodes[3],nodes[0],nodes[6], quadHelper );
2304 face = meshDS->AddFace(nodes[0],nodes[1],nodes[2],nodes[3],
2305 nodes[4],nodes[7],nodes[5],nodes[6]);
2306 // exclude qudrangle elements from computation of 3D mesh
2307 const_cast< netgen::Element2d& >( elem ).SetIndex( quadFaceID );
2310 MESSAGE("NETGEN created a face of unexpected type, ignoring");
2315 if ( comment.empty() ) comment << "Cannot create a mesh face";
2316 MESSAGE("Cannot create a mesh face");
2317 nbSeg = nbFac = nbVol = 0;
2320 if ( !aFace.IsNull() )
2321 meshDS->SetMeshElementOnShape( face, aFace );
2324 // ------------------
2325 // Create tetrahedra
2326 // ------------------
2328 for ( i = 1; i <= nbVol; ++i )
2330 const netgen::Element& elem = ngMesh.VolumeElement(i);
2331 int aSolidInd = elem.GetIndex();
2332 TopoDS_Solid aSolid;
2333 if ( aSolidInd > 0 && aSolidInd <= occgeo.somap.Extent() )
2334 aSolid = TopoDS::Solid(occgeo.somap(aSolidInd));
2336 for ( int j = 1; j <= elem.GetNP(); ++j )
2338 int pind = elem.PNum(j);
2339 if ( pind < 1 || pind >= (int)nodeVec.size() )
2341 if ( SMDS_MeshNode* node = nodeVec_ACCESS(pind) )
2343 nodes.push_back(node);
2344 if ( !aSolid.IsNull() && node->getshapeId() < 1 )
2345 meshDS->SetNodeInVolume(node, aSolid);
2348 if ((int) nodes.size() != elem.GetNP() )
2350 if ( comment.empty() )
2351 comment << "Invalid netgen 3d element #" << i;
2354 SMDS_MeshVolume* vol = NULL;
2355 switch ( elem.GetType() )
2358 vol = meshDS->AddVolume(nodes[0],nodes[1],nodes[2],nodes[3]);
2361 nodes[4] = mediumNode( nodes[0],nodes[1],nodes[4], quadHelper );
2362 nodes[7] = mediumNode( nodes[1],nodes[2],nodes[7], quadHelper );
2363 nodes[5] = mediumNode( nodes[2],nodes[0],nodes[5], quadHelper );
2364 nodes[6] = mediumNode( nodes[0],nodes[3],nodes[6], quadHelper );
2365 nodes[8] = mediumNode( nodes[1],nodes[3],nodes[8], quadHelper );
2366 nodes[9] = mediumNode( nodes[2],nodes[3],nodes[9], quadHelper );
2367 vol = meshDS->AddVolume(nodes[0],nodes[1],nodes[2],nodes[3],
2368 nodes[4],nodes[7],nodes[5],nodes[6],nodes[8],nodes[9]);
2371 MESSAGE("NETGEN created a volume of unexpected type, ignoring");
2376 if ( comment.empty() ) comment << "Cannot create a mesh volume";
2377 MESSAGE("Cannot create a mesh volume");
2378 nbSeg = nbFac = nbVol = 0;
2381 if (!aSolid.IsNull())
2382 meshDS->SetMeshElementOnShape(vol, aSolid);
2384 return comment.empty() ? 0 : 1;
2389 //================================================================================
2391 * \brief Convert error into text
2393 //================================================================================
2395 std::string text(int err)
2400 SMESH_Comment("Error in netgen::OCCGenerateMesh() at ") << netgen::multithread.task;
2403 //================================================================================
2405 * \brief Convert exception into text
2407 //================================================================================
2409 std::string text(Standard_Failure& ex)
2411 SMESH_Comment str("Exception in netgen::OCCGenerateMesh()");
2412 str << " at " << netgen::multithread.task
2413 << ": " << ex.DynamicType()->Name();
2414 if ( ex.GetMessageString() && strlen( ex.GetMessageString() ))
2415 str << ": " << ex.GetMessageString();
2418 //================================================================================
2420 * \brief Convert exception into text
2422 //================================================================================
2424 std::string text(netgen::NgException& ex)
2426 SMESH_Comment str("NgException");
2427 if ( strlen( netgen::multithread.task ) > 0 )
2428 str << " at " << netgen::multithread.task;
2429 str << ": " << ex.What();
2433 //================================================================================
2435 * \brief Looks for triangles lying on a SOLID
2437 //================================================================================
2439 bool hasBadElemOnSolid( const list<const SMDS_MeshElement*>& elems,
2440 SMESH_subMesh* solidSM )
2442 TopTools_IndexedMapOfShape solidSubs;
2443 TopExp::MapShapes( solidSM->GetSubShape(), solidSubs );
2444 SMESHDS_Mesh* mesh = solidSM->GetFather()->GetMeshDS();
2446 list<const SMDS_MeshElement*>::const_iterator e = elems.begin();
2447 for ( ; e != elems.end(); ++e )
2449 const SMDS_MeshElement* elem = *e;
2450 // if ( elem->GetType() != SMDSAbs_Face ) -- 23047
2452 int nbNodesOnSolid = 0, nbNodes = elem->NbNodes();
2453 SMDS_NodeIteratorPtr nIt = elem->nodeIterator();
2454 while ( nIt->more() )
2456 const SMDS_MeshNode* n = nIt->next();
2457 const TopoDS_Shape& s = mesh->IndexToShape( n->getshapeId() );
2458 nbNodesOnSolid += ( !s.IsNull() && solidSubs.Contains( s ));
2459 if ( nbNodesOnSolid > 2 ||
2460 nbNodesOnSolid == nbNodes)
2467 const double edgeMeshingTime = 0.001;
2468 const double faceMeshingTime = 0.019;
2469 const double edgeFaceMeshingTime = edgeMeshingTime + faceMeshingTime;
2470 const double faceOptimizTime = 0.06;
2471 const double voluMeshingTime = 0.15;
2472 const double volOptimizeTime = 0.77;
2475 //=============================================================================
2477 * Here we are going to use the NETGEN mesher
2479 //=============================================================================
2481 bool NETGENPlugin_Mesher::Compute()
2483 NETGENPlugin_NetgenLibWrapper ngLib;
2485 netgen::MeshingParameters& mparams = netgen::mparam;
2487 SMESH_ComputeErrorPtr error = SMESH_ComputeError::New();
2488 SMESH_MesherHelper quadHelper( *_mesh );
2489 quadHelper.SetIsQuadratic( mparams.secondorder );
2491 static string debugFile = "/tmp/ngMesh.py"; /* to call toPython( _ngMesh, debugFile )
2492 while debugging netgen */
2493 // -------------------------
2494 // Prepare OCC geometry
2495 // -------------------------
2497 netgen::OCCGeometry occgeo;
2498 list< SMESH_subMesh* > meshedSM[3]; // for 0-2 dimensions
2499 NETGENPlugin_Internals internals( *_mesh, _shape, _isVolume );
2500 PrepareOCCgeometry( occgeo, _shape, *_mesh, meshedSM, &internals );
2503 _totalTime = edgeFaceMeshingTime;
2505 _totalTime += faceOptimizTime;
2507 _totalTime += voluMeshingTime + ( _optimize ? volOptimizeTime : 0 );
2508 double doneTime = 0;
2511 _curShapeIndex = -1;
2513 // -------------------------
2514 // Generate the mesh
2515 // -------------------------
2518 NETGENPlugin_ngMeshInfo initState; // it remembers size of ng mesh equal to size of Smesh
2520 SMESH_Comment comment;
2523 // vector of nodes in which node index == netgen ID
2524 vector< const SMDS_MeshNode* > nodeVec;
2532 // not to RestrictLocalH() according to curvature during MESHCONST_ANALYSE
2533 mparams.uselocalh = false;
2534 mparams.grading = 0.8; // not limitited size growth
2536 if ( _simpleHyp->GetNumberOfSegments() )
2538 mparams.maxh = occgeo.boundingbox.Diam();
2541 mparams.maxh = _simpleHyp->GetLocalLength();
2544 if ( mparams.maxh == 0.0 )
2545 mparams.maxh = occgeo.boundingbox.Diam();
2546 if ( _simpleHyp || ( mparams.minh == 0.0 && _fineness != NETGENPlugin_Hypothesis::UserDefined))
2547 mparams.minh = GetDefaultMinSize( _shape, mparams.maxh );
2549 // Local size on faces
2550 occgeo.face_maxh = mparams.maxh;
2552 // Let netgen create _ngMesh and calculate element size on not meshed shapes
2556 int startWith = netgen::MESHCONST_ANALYSE;
2557 int endWith = netgen::MESHCONST_ANALYSE;
2562 err = netgen::OCCGenerateMesh(occgeo, _ngMesh, mparams, startWith, endWith);
2564 err = netgen::OCCGenerateMesh(occgeo, _ngMesh, startWith, endWith, optstr);
2566 if(netgen::multithread.terminate)
2569 comment << text(err);
2571 catch (Standard_Failure& ex)
2573 comment << text(ex);
2575 catch (netgen::NgException & ex)
2577 comment << text(ex);
2578 if ( mparams.meshsizefilename )
2579 throw SMESH_ComputeError(COMPERR_BAD_PARMETERS, comment );
2581 err = 0; //- MESHCONST_ANALYSE isn't so important step
2584 ngLib.setMesh(( Ng_Mesh*) _ngMesh );
2586 _ngMesh->ClearFaceDescriptors(); // we make descriptors our-self
2588 if ( !mparams.uselocalh ) // mparams.grading is not taken into account yet
2589 _ngMesh->LocalHFunction().SetGrading( mparams.grading );
2593 // Pass 1D simple parameters to NETGEN
2594 // --------------------------------
2595 int nbSeg = _simpleHyp->GetNumberOfSegments();
2596 double segSize = _simpleHyp->GetLocalLength();
2597 for ( int iE = 1; iE <= occgeo.emap.Extent(); ++iE )
2599 const TopoDS_Edge& e = TopoDS::Edge( occgeo.emap(iE));
2601 segSize = SMESH_Algo::EdgeLength( e ) / ( nbSeg - 0.4 );
2602 setLocalSize( e, segSize, *_ngMesh );
2605 else // if ( ! _simpleHyp )
2607 // Local size on shapes
2608 SetLocalSize( occgeo, *_ngMesh );
2611 // Precompute internal edges (issue 0020676) in order to
2612 // add mesh on them correctly (twice) to netgen mesh
2613 if ( !err && internals.hasInternalEdges() )
2615 // load internal shapes into OCCGeometry
2616 netgen::OCCGeometry intOccgeo;
2617 internals.getInternalEdges( intOccgeo.fmap, intOccgeo.emap, intOccgeo.vmap, meshedSM );
2618 intOccgeo.boundingbox = occgeo.boundingbox;
2619 intOccgeo.shape = occgeo.shape;
2620 intOccgeo.face_maxh.SetSize(intOccgeo.fmap.Extent());
2621 intOccgeo.face_maxh = netgen::mparam.maxh;
2622 netgen::Mesh *tmpNgMesh = NULL;
2626 // compute local H on internal shapes in the main mesh
2627 //OCCSetLocalMeshSize(intOccgeo, *_ngMesh); it deletes _ngMesh->localH
2629 // let netgen create a temporary mesh
2631 netgen::OCCGenerateMesh(intOccgeo, tmpNgMesh, mparams, startWith, endWith);
2633 netgen::OCCGenerateMesh(intOccgeo, tmpNgMesh, startWith, endWith, optstr);
2635 if(netgen::multithread.terminate)
2638 // copy LocalH from the main to temporary mesh
2639 initState.transferLocalH( _ngMesh, tmpNgMesh );
2641 // compute mesh on internal edges
2642 startWith = endWith = netgen::MESHCONST_MESHEDGES;
2644 err = netgen::OCCGenerateMesh(intOccgeo, tmpNgMesh, mparams, startWith, endWith);
2646 err = netgen::OCCGenerateMesh(intOccgeo, tmpNgMesh, startWith, endWith, optstr);
2648 comment << text(err);
2650 catch (Standard_Failure& ex)
2652 comment << text(ex);
2655 initState.restoreLocalH( tmpNgMesh );
2657 // fill SMESH by netgen mesh
2658 vector< const SMDS_MeshNode* > tmpNodeVec;
2659 FillSMesh( intOccgeo, *tmpNgMesh, initState, *_mesh, tmpNodeVec, comment );
2660 err = ( err || !comment.empty() );
2662 nglib::Ng_DeleteMesh((nglib::Ng_Mesh*)tmpNgMesh);
2665 // Fill _ngMesh with nodes and segments of computed submeshes
2668 err = ! ( FillNgMesh(occgeo, *_ngMesh, nodeVec, meshedSM[ MeshDim_0D ]) &&
2669 FillNgMesh(occgeo, *_ngMesh, nodeVec, meshedSM[ MeshDim_1D ], &quadHelper));
2671 initState = NETGENPlugin_ngMeshInfo(_ngMesh);
2676 startWith = endWith = netgen::MESHCONST_MESHEDGES;
2681 err = netgen::OCCGenerateMesh(occgeo, _ngMesh, mparams, startWith, endWith);
2683 err = netgen::OCCGenerateMesh(occgeo, _ngMesh, startWith, endWith, optstr);
2685 if(netgen::multithread.terminate)
2688 comment << text(err);
2690 catch (Standard_Failure& ex)
2692 comment << text(ex);
2697 _ticTime = ( doneTime += edgeMeshingTime ) / _totalTime / _progressTic;
2699 mparams.uselocalh = true; // restore as it is used at surface optimization
2701 // ---------------------
2702 // compute surface mesh
2703 // ---------------------
2706 // Pass 2D simple parameters to NETGEN
2708 if ( double area = _simpleHyp->GetMaxElementArea() ) {
2710 mparams.maxh = sqrt(2. * area/sqrt(3.0));
2711 mparams.grading = 0.4; // moderate size growth
2714 // length from edges
2715 if ( _ngMesh->GetNSeg() ) {
2716 double edgeLength = 0;
2717 TopTools_MapOfShape visitedEdges;
2718 for ( TopExp_Explorer exp( _shape, TopAbs_EDGE ); exp.More(); exp.Next() )
2719 if( visitedEdges.Add(exp.Current()) )
2720 edgeLength += SMESH_Algo::EdgeLength( TopoDS::Edge( exp.Current() ));
2721 // we have to multiply length by 2 since for each TopoDS_Edge there
2722 // are double set of NETGEN edges, in other words, we have to
2723 // divide _ngMesh->GetNSeg() by 2.
2724 mparams.maxh = 2*edgeLength / _ngMesh->GetNSeg();
2727 mparams.maxh = 1000;
2729 mparams.grading = 0.2; // slow size growth
2731 mparams.quad = _simpleHyp->GetAllowQuadrangles();
2732 mparams.maxh = min( mparams.maxh, occgeo.boundingbox.Diam()/2 );
2733 _ngMesh->SetGlobalH (mparams.maxh);
2734 netgen::Box<3> bb = occgeo.GetBoundingBox();
2735 bb.Increase (bb.Diam()/20);
2736 _ngMesh->SetLocalH (bb.PMin(), bb.PMax(), mparams.grading);
2739 // Care of vertices internal in faces (issue 0020676)
2740 if ( internals.hasInternalVertexInFace() )
2742 // store computed segments in SMESH in order not to create SMESH
2743 // edges for ng segments added by AddIntVerticesInFaces()
2744 FillSMesh( occgeo, *_ngMesh, initState, *_mesh, nodeVec, comment );
2745 // add segments to faces with internal vertices
2746 AddIntVerticesInFaces( occgeo, *_ngMesh, nodeVec, internals );
2747 initState = NETGENPlugin_ngMeshInfo(_ngMesh);
2750 // Build viscous layers
2751 if ( _isViscousLayers2D ||
2752 StdMeshers_ViscousLayers2D::HasProxyMesh( TopoDS::Face( occgeo.fmap(1) ), *_mesh ))
2754 if ( !internals.hasInternalVertexInFace() ) {
2755 FillSMesh( occgeo, *_ngMesh, initState, *_mesh, nodeVec, comment );
2756 initState = NETGENPlugin_ngMeshInfo(_ngMesh);
2758 SMESH_ProxyMesh::Ptr viscousMesh;
2759 SMESH_MesherHelper helper( *_mesh );
2760 for ( int faceID = 1; faceID <= occgeo.fmap.Extent(); ++faceID )
2762 const TopoDS_Face& F = TopoDS::Face( occgeo.fmap( faceID ));
2763 viscousMesh = StdMeshers_ViscousLayers2D::Compute( *_mesh, F );
2766 if ( viscousMesh->NbProxySubMeshes() == 0 )
2768 // exclude from computation ng segments built on EDGEs of F
2769 for (int i = 1; i <= _ngMesh->GetNSeg(); i++)
2771 netgen::Segment & seg = _ngMesh->LineSegment(i);
2772 if (seg.si == faceID)
2775 // add new segments to _ngMesh instead of excluded ones
2776 helper.SetSubShape( F );
2778 StdMeshers_FaceSide::GetFaceWires( F, *_mesh, /*skipMediumNodes=*/true,
2779 error, viscousMesh );
2780 error = AddSegmentsToMesh( *_ngMesh, occgeo, wires, helper, nodeVec );
2782 if ( !error ) error = SMESH_ComputeError::New();
2784 initState = NETGENPlugin_ngMeshInfo(_ngMesh);
2787 // Let netgen compute 2D mesh
2788 startWith = netgen::MESHCONST_MESHSURFACE;
2789 endWith = _optimize ? netgen::MESHCONST_OPTSURFACE : netgen::MESHCONST_MESHSURFACE;
2794 err = netgen::OCCGenerateMesh(occgeo, _ngMesh, mparams, startWith, endWith);
2796 err = netgen::OCCGenerateMesh(occgeo, _ngMesh, startWith, endWith, optstr);
2798 if(netgen::multithread.terminate)
2801 comment << text (err);
2803 catch (Standard_Failure& ex)
2805 comment << text(ex);
2806 //err = 1; -- try to make volumes anyway
2808 catch (netgen::NgException exc)
2810 comment << text(exc);
2811 //err = 1; -- try to make volumes anyway
2816 doneTime += faceMeshingTime + ( _optimize ? faceOptimizTime : 0 );
2817 _ticTime = doneTime / _totalTime / _progressTic;
2819 // ---------------------
2820 // generate volume mesh
2821 // ---------------------
2822 // Fill _ngMesh with nodes and faces of computed 2D submeshes
2823 if ( !err && _isVolume && ( !meshedSM[ MeshDim_2D ].empty() || mparams.quad ))
2825 // load SMESH with computed segments and faces
2826 FillSMesh( occgeo, *_ngMesh, initState, *_mesh, nodeVec, comment, &quadHelper );
2828 // compute pyramids on quadrangles
2829 SMESH_ProxyMesh::Ptr proxyMesh;
2830 if ( _mesh->NbQuadrangles() > 0 )
2831 for ( int iS = 1; iS <= occgeo.somap.Extent(); ++iS )
2833 StdMeshers_QuadToTriaAdaptor* Adaptor = new StdMeshers_QuadToTriaAdaptor;
2834 proxyMesh.reset( Adaptor );
2836 int nbPyrams = _mesh->NbPyramids();
2837 Adaptor->Compute( *_mesh, occgeo.somap(iS) );
2838 if ( nbPyrams != _mesh->NbPyramids() )
2840 list< SMESH_subMesh* > quadFaceSM;
2841 for (TopExp_Explorer face(occgeo.somap(iS), TopAbs_FACE); face.More(); face.Next())
2842 if ( Adaptor->GetProxySubMesh( face.Current() ))
2844 quadFaceSM.push_back( _mesh->GetSubMesh( face.Current() ));
2845 meshedSM[ MeshDim_2D ].remove( quadFaceSM.back() );
2847 FillNgMesh(occgeo, *_ngMesh, nodeVec, quadFaceSM, &quadHelper, proxyMesh);
2850 // fill _ngMesh with faces of sub-meshes
2851 err = ! ( FillNgMesh(occgeo, *_ngMesh, nodeVec, meshedSM[ MeshDim_2D ], &quadHelper));
2852 initState = NETGENPlugin_ngMeshInfo(_ngMesh);
2853 //toPython( _ngMesh, "/tmp/ngPython.py");
2855 if (!err && _isVolume)
2857 // Pass 3D simple parameters to NETGEN
2858 const NETGENPlugin_SimpleHypothesis_3D* simple3d =
2859 dynamic_cast< const NETGENPlugin_SimpleHypothesis_3D* > ( _simpleHyp );
2861 if ( double vol = simple3d->GetMaxElementVolume() ) {
2863 mparams.maxh = pow( 72, 1/6. ) * pow( vol, 1/3. );
2864 mparams.maxh = min( mparams.maxh, occgeo.boundingbox.Diam()/2 );
2867 // length from faces
2868 mparams.maxh = _ngMesh->AverageH();
2870 _ngMesh->SetGlobalH (mparams.maxh);
2871 mparams.grading = 0.4;
2873 _ngMesh->CalcLocalH(mparams.grading);
2875 _ngMesh->CalcLocalH();
2878 // Care of vertices internal in solids and internal faces (issue 0020676)
2879 if ( internals.hasInternalVertexInSolid() || internals.hasInternalFaces() )
2881 // store computed faces in SMESH in order not to create SMESH
2882 // faces for ng faces added here
2883 FillSMesh( occgeo, *_ngMesh, initState, *_mesh, nodeVec, comment, &quadHelper );
2884 // add ng faces to solids with internal vertices
2885 AddIntVerticesInSolids( occgeo, *_ngMesh, nodeVec, internals );
2886 // duplicate mesh faces on internal faces
2887 FixIntFaces( occgeo, *_ngMesh, internals );
2888 initState = NETGENPlugin_ngMeshInfo(_ngMesh);
2890 // Let netgen compute 3D mesh
2891 startWith = endWith = netgen::MESHCONST_MESHVOLUME;
2896 err = netgen::OCCGenerateMesh(occgeo, _ngMesh, mparams, startWith, endWith);
2898 err = netgen::OCCGenerateMesh(occgeo, _ngMesh, startWith, endWith, optstr);
2900 if(netgen::multithread.terminate)
2903 if ( comment.empty() ) // do not overwrite a previos error
2904 comment << text(err);
2906 catch (Standard_Failure& ex)
2908 if ( comment.empty() ) // do not overwrite a previos error
2909 comment << text(ex);
2912 catch (netgen::NgException exc)
2914 if ( comment.empty() ) // do not overwrite a previos error
2915 comment << text(exc);
2918 _ticTime = ( doneTime += voluMeshingTime ) / _totalTime / _progressTic;
2920 // Let netgen optimize 3D mesh
2921 if ( !err && _optimize )
2923 startWith = endWith = netgen::MESHCONST_OPTVOLUME;
2928 err = netgen::OCCGenerateMesh(occgeo, _ngMesh, mparams, startWith, endWith);
2930 err = netgen::OCCGenerateMesh(occgeo, _ngMesh, startWith, endWith, optstr);
2932 if(netgen::multithread.terminate)
2935 if ( comment.empty() ) // do not overwrite a previos error
2936 comment << text(err);
2938 catch (Standard_Failure& ex)
2940 if ( comment.empty() ) // do not overwrite a previos error
2941 comment << text(ex);
2943 catch (netgen::NgException exc)
2945 if ( comment.empty() ) // do not overwrite a previos error
2946 comment << text(exc);
2950 if (!err && mparams.secondorder > 0)
2955 if ( !meshedSM[ MeshDim_1D ].empty() )
2957 // remove segments not attached to geometry (IPAL0052479)
2958 for (int i = 1; i <= _ngMesh->GetNSeg(); ++i)
2960 const netgen::Segment & seg = _ngMesh->LineSegment (i);
2961 if ( seg.epgeominfo[ 0 ].edgenr == 0 )
2962 _ngMesh->DeleteSegment( i );
2964 _ngMesh->Compress();
2966 // convert to quadratic
2967 netgen::OCCRefinementSurfaces ref (occgeo);
2968 ref.MakeSecondOrder (*_ngMesh);
2970 // care of elements already loaded to SMESH
2971 // if ( initState._nbSegments > 0 )
2972 // makeQuadratic( occgeo.emap, _mesh );
2973 // if ( initState._nbFaces > 0 )
2974 // makeQuadratic( occgeo.fmap, _mesh );
2976 catch (Standard_Failure& ex)
2978 if ( comment.empty() ) // do not overwrite a previos error
2979 comment << "Exception in netgen at passing to 2nd order ";
2981 catch (netgen::NgException exc)
2983 if ( comment.empty() ) // do not overwrite a previos error
2984 comment << exc.What();
2989 _ticTime = 0.98 / _progressTic;
2991 //int nbNod = _ngMesh->GetNP();
2992 //int nbSeg = _ngMesh->GetNSeg();
2993 int nbFac = _ngMesh->GetNSE();
2994 int nbVol = _ngMesh->GetNE();
2995 bool isOK = ( !err && (_isVolume ? (nbVol > 0) : (nbFac > 0)) );
2997 // Feed back the SMESHDS with the generated Nodes and Elements
2998 if ( true /*isOK*/ ) // get whatever built
3000 FillSMesh( occgeo, *_ngMesh, initState, *_mesh, nodeVec, comment, &quadHelper );
3002 if ( quadHelper.GetIsQuadratic() ) // remove free nodes
3003 for ( size_t i = 0; i < nodeVec.size(); ++i )
3004 if ( nodeVec[i] && nodeVec[i]->NbInverseElements() == 0 )
3005 _mesh->GetMeshDS()->RemoveFreeNode( nodeVec[i], 0, /*fromGroups=*/false );
3007 SMESH_ComputeErrorPtr readErr = ReadErrors(nodeVec);
3008 if ( readErr && !readErr->myBadElements.empty() )
3011 if ( !comment.empty() && !readErr->myComment.empty() ) comment += "\n";
3012 comment += readErr->myComment;
3014 if ( error->IsOK() && ( !isOK || comment.size() > 0 ))
3015 error->myName = COMPERR_ALGO_FAILED;
3016 if ( !comment.empty() )
3017 error->myComment = comment;
3019 // SetIsAlwaysComputed( true ) to empty sub-meshes, which
3020 // appear if the geometry contains coincident sub-shape due
3021 // to bool merge_solids = 1; in netgen/libsrc/occ/occgenmesh.cpp
3022 const int nbMaps = 2;
3023 const TopTools_IndexedMapOfShape* geoMaps[nbMaps] =
3024 { & occgeo.vmap, & occgeo.emap/*, & occgeo.fmap*/ };
3025 for ( int iMap = 0; iMap < nbMaps; ++iMap )
3026 for (int i = 1; i <= geoMaps[iMap]->Extent(); i++)
3027 if ( SMESH_subMesh* sm = _mesh->GetSubMeshContaining( geoMaps[iMap]->FindKey(i)))
3028 if ( !sm->IsMeshComputed() )
3029 sm->SetIsAlwaysComputed( true );
3031 // set bad compute error to subshapes of all failed sub-shapes
3032 if ( !error->IsOK() )
3034 bool pb2D = false, pb3D = false;
3035 for (int i = 1; i <= occgeo.fmap.Extent(); i++) {
3036 int status = occgeo.facemeshstatus[i-1];
3037 if (status == netgen::FACE_MESHED_OK ) continue;
3038 if ( SMESH_subMesh* sm = _mesh->GetSubMeshContaining( occgeo.fmap( i ))) {
3039 SMESH_ComputeErrorPtr& smError = sm->GetComputeError();
3040 if ( !smError || smError->IsOK() ) {
3041 if ( status == netgen::FACE_FAILED )
3042 smError.reset( new SMESH_ComputeError( *error ));
3044 smError.reset( new SMESH_ComputeError( COMPERR_ALGO_FAILED, "Ignored" ));
3045 if ( SMESH_Algo::GetMeshError( sm ) == SMESH_Algo::MEr_OK )
3046 smError->myName = COMPERR_WARNING;
3048 pb2D = pb2D || smError->IsKO();
3051 if ( !pb2D ) // all faces are OK
3052 for (int i = 1; i <= occgeo.somap.Extent(); i++)
3053 if ( SMESH_subMesh* sm = _mesh->GetSubMeshContaining( occgeo.somap( i )))
3055 bool smComputed = nbVol && !sm->IsEmpty();
3056 if ( smComputed && internals.hasInternalVertexInSolid( sm->GetId() ))
3058 int nbIntV = internals.getSolidsWithVertices().find( sm->GetId() )->second.size();
3059 SMESHDS_SubMesh* smDS = sm->GetSubMeshDS();
3060 smComputed = ( smDS->NbElements() > 0 || smDS->NbNodes() > nbIntV );
3062 SMESH_ComputeErrorPtr& smError = sm->GetComputeError();
3063 if ( !smComputed && ( !smError || smError->IsOK() ))
3065 smError.reset( new SMESH_ComputeError( *error ));
3066 if ( nbVol && SMESH_Algo::GetMeshError( sm ) == SMESH_Algo::MEr_OK )
3068 smError->myName = COMPERR_WARNING;
3070 else if ( !smError->myBadElements.empty() ) // bad surface mesh
3072 if ( !hasBadElemOnSolid( smError->myBadElements, sm ))
3076 pb3D = pb3D || ( smError && smError->IsKO() );
3078 if ( !pb2D && !pb3D )
3079 err = 0; // no fatal errors, only warnings
3082 ngLib._isComputeOk = !err;
3087 //=============================================================================
3091 //=============================================================================
3092 bool NETGENPlugin_Mesher::Evaluate(MapShapeNbElems& aResMap)
3094 netgen::MeshingParameters& mparams = netgen::mparam;
3097 // -------------------------
3098 // Prepare OCC geometry
3099 // -------------------------
3100 netgen::OCCGeometry occgeo;
3101 list< SMESH_subMesh* > meshedSM[4]; // for 0-3 dimensions
3102 NETGENPlugin_Internals internals( *_mesh, _shape, _isVolume );
3103 PrepareOCCgeometry( occgeo, _shape, *_mesh, meshedSM, &internals );
3105 bool tooManyElems = false;
3106 const int hugeNb = std::numeric_limits<int>::max() / 100;
3111 // pass 1D simple parameters to NETGEN
3114 // not to RestrictLocalH() according to curvature during MESHCONST_ANALYSE
3115 mparams.uselocalh = false;
3116 mparams.grading = 0.8; // not limitited size growth
3118 if ( _simpleHyp->GetNumberOfSegments() )
3120 mparams.maxh = occgeo.boundingbox.Diam();
3123 mparams.maxh = _simpleHyp->GetLocalLength();
3126 if ( mparams.maxh == 0.0 )
3127 mparams.maxh = occgeo.boundingbox.Diam();
3128 if ( _simpleHyp || ( mparams.minh == 0.0 && _fineness != NETGENPlugin_Hypothesis::UserDefined))
3129 mparams.minh = GetDefaultMinSize( _shape, mparams.maxh );
3131 // let netgen create _ngMesh and calculate element size on not meshed shapes
3132 NETGENPlugin_NetgenLibWrapper ngLib;
3133 netgen::Mesh *ngMesh = NULL;
3137 int startWith = netgen::MESHCONST_ANALYSE;
3138 int endWith = netgen::MESHCONST_MESHEDGES;
3140 int err = netgen::OCCGenerateMesh(occgeo, ngMesh, mparams, startWith, endWith);
3142 int err = netgen::OCCGenerateMesh(occgeo, ngMesh, startWith, endWith, optstr);
3145 if(netgen::multithread.terminate)
3148 ngLib.setMesh(( Ng_Mesh*) ngMesh );
3150 if ( SMESH_subMesh* sm = _mesh->GetSubMeshContaining( _shape ))
3151 sm->GetComputeError().reset( new SMESH_ComputeError( COMPERR_ALGO_FAILED ));
3156 // Pass 1D simple parameters to NETGEN
3157 // --------------------------------
3158 int nbSeg = _simpleHyp->GetNumberOfSegments();
3159 double segSize = _simpleHyp->GetLocalLength();
3160 for ( int iE = 1; iE <= occgeo.emap.Extent(); ++iE )
3162 const TopoDS_Edge& e = TopoDS::Edge( occgeo.emap(iE));
3164 segSize = SMESH_Algo::EdgeLength( e ) / ( nbSeg - 0.4 );
3165 setLocalSize( e, segSize, *ngMesh );
3168 else // if ( ! _simpleHyp )
3170 // Local size on shapes
3171 SetLocalSize( occgeo, *ngMesh );
3173 // calculate total nb of segments and length of edges
3174 double fullLen = 0.0;
3176 int entity = mparams.secondorder > 0 ? SMDSEntity_Quad_Edge : SMDSEntity_Edge;
3177 TopTools_DataMapOfShapeInteger Edge2NbSeg;
3178 for (TopExp_Explorer exp(_shape, TopAbs_EDGE); exp.More(); exp.Next())
3180 TopoDS_Edge E = TopoDS::Edge( exp.Current() );
3181 if( !Edge2NbSeg.Bind(E,0) )
3184 double aLen = SMESH_Algo::EdgeLength(E);
3187 vector<int>& aVec = aResMap[_mesh->GetSubMesh(E)];
3189 aVec.resize( SMDSEntity_Last, 0);
3191 fullNbSeg += aVec[ entity ];
3194 // store nb of segments computed by Netgen
3195 NCollection_Map<Link> linkMap;
3196 for (int i = 1; i <= ngMesh->GetNSeg(); ++i )
3198 const netgen::Segment& seg = ngMesh->LineSegment(i);
3199 Link link(seg[0], seg[1]);
3200 if ( !linkMap.Add( link )) continue;
3201 int aGeomEdgeInd = seg.epgeominfo[0].edgenr;
3202 if (aGeomEdgeInd > 0 && aGeomEdgeInd <= occgeo.emap.Extent())
3204 vector<int>& aVec = aResMap[_mesh->GetSubMesh(occgeo.emap(aGeomEdgeInd))];
3208 // store nb of nodes on edges computed by Netgen
3209 TopTools_DataMapIteratorOfDataMapOfShapeInteger Edge2NbSegIt(Edge2NbSeg);
3210 for (; Edge2NbSegIt.More(); Edge2NbSegIt.Next())
3212 vector<int>& aVec = aResMap[_mesh->GetSubMesh(Edge2NbSegIt.Key())];
3213 if ( aVec[ entity ] > 1 && aVec[ SMDSEntity_Node ] == 0 )
3214 aVec[SMDSEntity_Node] = mparams.secondorder > 0 ? 2*aVec[ entity ]-1 : aVec[ entity ]-1;
3216 fullNbSeg += aVec[ entity ];
3217 Edge2NbSeg( Edge2NbSegIt.Key() ) = aVec[ entity ];
3219 if ( fullNbSeg == 0 )
3226 if ( double area = _simpleHyp->GetMaxElementArea() ) {
3228 mparams.maxh = sqrt(2. * area/sqrt(3.0));
3229 mparams.grading = 0.4; // moderate size growth
3232 // length from edges
3233 mparams.maxh = fullLen/fullNbSeg;
3234 mparams.grading = 0.2; // slow size growth
3237 mparams.maxh = min( mparams.maxh, occgeo.boundingbox.Diam()/2 );
3238 mparams.maxh = min( mparams.maxh, fullLen/fullNbSeg * (1. + mparams.grading));
3240 for (TopExp_Explorer exp(_shape, TopAbs_FACE); exp.More(); exp.Next())
3242 TopoDS_Face F = TopoDS::Face( exp.Current() );
3243 SMESH_subMesh *sm = _mesh->GetSubMesh(F);
3245 BRepGProp::SurfaceProperties(F,G);
3246 double anArea = G.Mass();
3247 tooManyElems = tooManyElems || ( anArea/hugeNb > mparams.maxh*mparams.maxh );
3249 if ( !tooManyElems )
3251 TopTools_MapOfShape egdes;
3252 for (TopExp_Explorer exp1(F,TopAbs_EDGE); exp1.More(); exp1.Next())
3253 if ( egdes.Add( exp1.Current() ))
3254 nb1d += Edge2NbSeg.Find(exp1.Current());
3256 int nbFaces = tooManyElems ? hugeNb : int( 4*anArea / (mparams.maxh*mparams.maxh*sqrt(3.)));
3257 int nbNodes = tooManyElems ? hugeNb : (( nbFaces*3 - (nb1d-1)*2 ) / 6 + 1 );
3259 vector<int> aVec(SMDSEntity_Last, 0);
3260 if( mparams.secondorder > 0 ) {
3261 int nb1d_in = (nbFaces*3 - nb1d) / 2;
3262 aVec[SMDSEntity_Node] = nbNodes + nb1d_in;
3263 aVec[SMDSEntity_Quad_Triangle] = nbFaces;
3266 aVec[SMDSEntity_Node] = Max ( nbNodes, 0 );
3267 aVec[SMDSEntity_Triangle] = nbFaces;
3269 aResMap[sm].swap(aVec);
3276 // pass 3D simple parameters to NETGEN
3277 const NETGENPlugin_SimpleHypothesis_3D* simple3d =
3278 dynamic_cast< const NETGENPlugin_SimpleHypothesis_3D* > ( _simpleHyp );
3280 if ( double vol = simple3d->GetMaxElementVolume() ) {
3282 mparams.maxh = pow( 72, 1/6. ) * pow( vol, 1/3. );
3283 mparams.maxh = min( mparams.maxh, occgeo.boundingbox.Diam()/2 );
3286 // using previous length from faces
3288 mparams.grading = 0.4;
3289 mparams.maxh = min( mparams.maxh, fullLen/fullNbSeg * (1. + mparams.grading));
3292 BRepGProp::VolumeProperties(_shape,G);
3293 double aVolume = G.Mass();
3294 double tetrVol = 0.1179*mparams.maxh*mparams.maxh*mparams.maxh;
3295 tooManyElems = tooManyElems || ( aVolume/hugeNb > tetrVol );
3296 int nbVols = tooManyElems ? hugeNb : int(aVolume/tetrVol);
3297 int nb1d_in = int(( nbVols*6 - fullNbSeg ) / 6 );
3298 vector<int> aVec(SMDSEntity_Last, 0 );
3299 if ( tooManyElems ) // avoid FPE
3301 aVec[SMDSEntity_Node] = hugeNb;
3302 aVec[ mparams.secondorder > 0 ? SMDSEntity_Quad_Tetra : SMDSEntity_Tetra] = hugeNb;
3306 if( mparams.secondorder > 0 ) {
3307 aVec[SMDSEntity_Node] = nb1d_in/3 + 1 + nb1d_in;
3308 aVec[SMDSEntity_Quad_Tetra] = nbVols;
3311 aVec[SMDSEntity_Node] = nb1d_in/3 + 1;
3312 aVec[SMDSEntity_Tetra] = nbVols;
3315 SMESH_subMesh *sm = _mesh->GetSubMesh(_shape);
3316 aResMap[sm].swap(aVec);
3322 double NETGENPlugin_Mesher::GetProgress(const SMESH_Algo* holder,
3323 const int * algoProgressTic,
3324 const double * algoProgress) const
3326 ((int&) _progressTic ) = *algoProgressTic + 1;
3328 if ( !_occgeom ) return 0;
3330 double progress = -1;
3333 if ( _ticTime < 0 && netgen::multithread.task[0] == 'O'/*Optimizing surface*/ )
3335 ((double&) _ticTime ) = edgeFaceMeshingTime / _totalTime / _progressTic;
3337 else if ( !_optimize /*&& _occgeom->fmap.Extent() > 1*/ )
3339 int doneShapeIndex = -1;
3340 while ( doneShapeIndex+1 < _occgeom->facemeshstatus.Size() &&
3341 _occgeom->facemeshstatus[ doneShapeIndex+1 ])
3343 if ( doneShapeIndex+1 != _curShapeIndex )
3345 ((int&) _curShapeIndex) = doneShapeIndex+1;
3346 double doneShapeRate = _curShapeIndex / double( _occgeom->fmap.Extent() );
3347 double doneTime = edgeMeshingTime + doneShapeRate * faceMeshingTime;
3348 ((double&) _ticTime) = doneTime / _totalTime / _progressTic;
3349 // cout << "shape " << _curShapeIndex << " _ticTime " << _ticTime
3350 // << " " << doneTime / _totalTime / _progressTic << endl;
3354 else if ( !_optimize && _occgeom->somap.Extent() > 1 )
3356 int curShapeIndex = _curShapeIndex;
3357 if ( _ngMesh->GetNE() > 0 )
3359 netgen::Element el = (*_ngMesh)[netgen::ElementIndex( _ngMesh->GetNE()-1 )];
3360 curShapeIndex = el.GetIndex();
3362 if ( curShapeIndex != _curShapeIndex )
3364 ((int&) _curShapeIndex) = curShapeIndex;
3365 double doneShapeRate = _curShapeIndex / double( _occgeom->somap.Extent() );
3366 double doneTime = edgeFaceMeshingTime + doneShapeRate * voluMeshingTime;
3367 ((double&) _ticTime) = doneTime / _totalTime / _progressTic;
3368 // cout << "shape " << _curShapeIndex << " _ticTime " << _ticTime
3369 // << " " << doneTime / _totalTime / _progressTic << endl;
3374 progress = Max( *algoProgressTic * _ticTime, *algoProgress );
3379 netgen::multithread.task[0] == 'D'/*elaunay meshing*/ &&
3380 progress > voluMeshingTime )
3382 progress = voluMeshingTime;
3383 ((double&) _ticTime) = voluMeshingTime / _totalTime / _progressTic;
3385 ((int&) *algoProgressTic )++;
3386 ((double&) *algoProgress) = progress;
3388 //cout << progress << " " << *algoProgressTic << " " << netgen::multithread.task << " "<< _ticTime << endl;
3390 return Min( progress, 0.99 );
3393 //================================================================================
3395 * \brief Read mesh entities preventing successful computation from "test.out" file
3397 //================================================================================
3399 SMESH_ComputeErrorPtr
3400 NETGENPlugin_Mesher::ReadErrors(const vector<const SMDS_MeshNode* >& nodeVec)
3402 SMESH_ComputeErrorPtr err = SMESH_ComputeError::New
3403 (COMPERR_BAD_INPUT_MESH, "Some edges multiple times in surface mesh");
3404 SMESH_File file("test.out");
3406 vector<int> three1(3), three2(3);
3407 const char* badEdgeStr = " multiple times in surface mesh";
3408 const int badEdgeStrLen = strlen( badEdgeStr );
3409 const int nbNodes = nodeVec.size();
3411 while( !file.eof() )
3413 if ( strncmp( file, "Edge ", 5 ) == 0 &&
3414 file.getInts( two ) &&
3415 strncmp( file, badEdgeStr, badEdgeStrLen ) == 0 &&
3416 two[0] < nbNodes && two[1] < nbNodes )
3418 err->myBadElements.push_back( new SMDS_LinearEdge( nodeVec[ two[0]], nodeVec[ two[1]] ));
3419 file += badEdgeStrLen;
3421 else if ( strncmp( file, "Intersecting: ", 14 ) == 0 )
3424 // openelement 18 with open element 126
3428 const char* pos = file;
3429 bool ok = ( strncmp( file, "openelement ", 12 ) == 0 );
3430 ok = ok && file.getInts( two );
3431 ok = ok && file.getInts( three1 );
3432 ok = ok && file.getInts( three2 );
3433 for ( int i = 0; ok && i < 3; ++i )
3434 ok = ( three1[i] < nbNodes && nodeVec[ three1[i]]);
3435 for ( int i = 0; ok && i < 3; ++i )
3436 ok = ( three2[i] < nbNodes && nodeVec[ three2[i]]);
3439 err->myBadElements.push_back( new SMDS_FaceOfNodes( nodeVec[ three1[0]],
3440 nodeVec[ three1[1]],
3441 nodeVec[ three1[2]]));
3442 err->myBadElements.push_back( new SMDS_FaceOfNodes( nodeVec[ three2[0]],
3443 nodeVec[ three2[1]],
3444 nodeVec[ three2[2]]));
3445 err->myComment = "Intersecting triangles";
3459 size_t nbBadElems = err->myBadElements.size();
3460 if ( nbBadElems ) nbBadElems++; // avoid warning: variable set but not used
3466 //================================================================================
3468 * \brief Write a python script creating an equivalent SALOME mesh.
3469 * This is useful to see what mesh is passed as input for the next step of mesh
3470 * generation (of mesh of higher dimension)
3472 //================================================================================
3474 void NETGENPlugin_Mesher::toPython( const netgen::Mesh* ngMesh )
3476 const char* pyFile = "/tmp/ngMesh.py";
3477 ofstream outfile( pyFile, ios::out );
3478 if ( !outfile ) return;
3480 outfile << "import SMESH" << endl
3481 << "from salome.smesh import smeshBuilder" << endl
3482 << "smesh = smeshBuilder.New()" << endl
3483 << "mesh = smesh.Mesh()" << endl << endl;
3485 using namespace netgen;
3487 for (pi = PointIndex::BASE;
3488 pi < ngMesh->GetNP()+PointIndex::BASE; pi++)
3490 outfile << "mesh.AddNode( ";
3491 outfile << (*ngMesh)[pi](0) << ", ";
3492 outfile << (*ngMesh)[pi](1) << ", ";
3493 outfile << (*ngMesh)[pi](2) << ") ## "<< pi << endl;
3496 int nbDom = ngMesh->GetNDomains();
3497 for ( int i = 0; i < nbDom; ++i )
3498 outfile<< "grp" << i+1 << " = mesh.CreateEmptyGroup( SMESH.FACE, 'domain"<< i+1 << "')"<< endl;
3500 SurfaceElementIndex sei;
3501 for (sei = 0; sei < ngMesh->GetNSE(); sei++)
3503 outfile << "mesh.AddFace([ ";
3504 Element2d sel = (*ngMesh)[sei];
3505 for (int j = 0; j < sel.GetNP(); j++)
3506 outfile << sel[j] << ( j+1 < sel.GetNP() ? ", " : " ])");
3507 if ( sel.IsDeleted() ) outfile << " ## IsDeleted ";
3510 if ((*ngMesh)[sei].GetIndex())
3512 if ( int dom1 = ngMesh->GetFaceDescriptor((*ngMesh)[sei].GetIndex ()).DomainIn())
3513 outfile << "grp"<< dom1 <<".Add([ " << (int)sei+1 << " ])" << endl;
3514 if ( int dom2 = ngMesh->GetFaceDescriptor((*ngMesh)[sei].GetIndex ()).DomainOut())
3515 outfile << "grp"<< dom2 <<".Add([ " << (int)sei+1 << " ])" << endl;
3519 for (ElementIndex ei = 0; ei < ngMesh->GetNE(); ei++)
3521 Element el = (*ngMesh)[ei];
3522 outfile << "mesh.AddVolume([ ";
3523 for (int j = 0; j < el.GetNP(); j++)
3524 outfile << el[j] << ( j+1 < el.GetNP() ? ", " : " ])");
3528 for (int i = 1; i <= ngMesh->GetNSeg(); i++)
3530 const Segment & seg = ngMesh->LineSegment (i);
3531 outfile << "mesh.AddEdge([ "
3533 << seg[1] << " ])" << endl;
3535 cout << "Write " << pyFile << endl;
3538 //================================================================================
3540 * \brief Constructor of NETGENPlugin_ngMeshInfo
3542 //================================================================================
3544 NETGENPlugin_ngMeshInfo::NETGENPlugin_ngMeshInfo( netgen::Mesh* ngMesh):
3549 _nbNodes = ngMesh->GetNP();
3550 _nbSegments = ngMesh->GetNSeg();
3551 _nbFaces = ngMesh->GetNSE();
3552 _nbVolumes = ngMesh->GetNE();
3556 _nbNodes = _nbSegments = _nbFaces = _nbVolumes = 0;
3560 //================================================================================
3562 * \brief Copy LocalH member from one netgen mesh to another
3564 //================================================================================
3566 void NETGENPlugin_ngMeshInfo::transferLocalH( netgen::Mesh* fromMesh,
3567 netgen::Mesh* toMesh )
3569 if ( !fromMesh->LocalHFunctionGenerated() ) return;
3570 if ( !toMesh->LocalHFunctionGenerated() )
3572 toMesh->CalcLocalH(netgen::mparam.grading);
3574 toMesh->CalcLocalH();
3577 const size_t size = sizeof( netgen::LocalH );
3578 _copyOfLocalH = new char[ size ];
3579 memcpy( (void*)_copyOfLocalH, (void*)&toMesh->LocalHFunction(), size );
3580 memcpy( (void*)&toMesh->LocalHFunction(), (void*)&fromMesh->LocalHFunction(), size );
3583 //================================================================================
3585 * \brief Restore LocalH member of a netgen mesh
3587 //================================================================================
3589 void NETGENPlugin_ngMeshInfo::restoreLocalH( netgen::Mesh* toMesh )
3591 if ( _copyOfLocalH )
3593 const size_t size = sizeof( netgen::LocalH );
3594 memcpy( (void*)&toMesh->LocalHFunction(), (void*)_copyOfLocalH, size );
3595 delete [] _copyOfLocalH;
3600 //================================================================================
3602 * \brief Find "internal" sub-shapes
3604 //================================================================================
3606 NETGENPlugin_Internals::NETGENPlugin_Internals( SMESH_Mesh& mesh,
3607 const TopoDS_Shape& shape,
3609 : _mesh( mesh ), _is3D( is3D )
3611 SMESHDS_Mesh* meshDS = mesh.GetMeshDS();
3613 TopExp_Explorer f,e;
3614 for ( f.Init( shape, TopAbs_FACE ); f.More(); f.Next() )
3616 int faceID = meshDS->ShapeToIndex( f.Current() );
3618 // find not computed internal edges
3620 for ( e.Init( f.Current().Oriented(TopAbs_FORWARD), TopAbs_EDGE ); e.More(); e.Next() )
3621 if ( e.Current().Orientation() == TopAbs_INTERNAL )
3623 SMESH_subMesh* eSM = mesh.GetSubMesh( e.Current() );
3624 if ( eSM->IsEmpty() )
3626 _e2face.insert( make_pair( eSM->GetId(), faceID ));
3627 for ( TopoDS_Iterator v(e.Current()); v.More(); v.Next() )
3628 _e2face.insert( make_pair( meshDS->ShapeToIndex( v.Value() ), faceID ));
3632 // find internal vertices in a face
3633 set<int> intVV; // issue 0020850 where same vertex is twice in a face
3634 for ( TopoDS_Iterator fSub( f.Current() ); fSub.More(); fSub.Next())
3635 if ( fSub.Value().ShapeType() == TopAbs_VERTEX )
3637 int vID = meshDS->ShapeToIndex( fSub.Value() );
3638 if ( intVV.insert( vID ).second )
3639 _f2v[ faceID ].push_back( vID );
3644 // find internal faces and their subshapes where nodes are to be doubled
3645 // to make a crack with non-sewed borders
3647 if ( f.Current().Orientation() == TopAbs_INTERNAL )
3649 _intShapes.insert( meshDS->ShapeToIndex( f.Current() ));
3652 list< TopoDS_Shape > edges;
3653 for ( e.Init( f.Current(), TopAbs_EDGE ); e.More(); e.Next())
3654 if ( SMESH_MesherHelper::NbAncestors( e.Current(), mesh, TopAbs_FACE ) > 1 )
3656 _intShapes.insert( meshDS->ShapeToIndex( e.Current() ));
3657 edges.push_back( e.Current() );
3658 // find border faces
3659 PShapeIteratorPtr fIt =
3660 SMESH_MesherHelper::GetAncestors( edges.back(),mesh,TopAbs_FACE );
3661 while ( const TopoDS_Shape* pFace = fIt->next() )
3662 if ( !pFace->IsSame( f.Current() ))
3663 _borderFaces.insert( meshDS->ShapeToIndex( *pFace ));
3666 // we consider vertex internal if it is shared by more than one internal edge
3667 list< TopoDS_Shape >::iterator edge = edges.begin();
3668 for ( ; edge != edges.end(); ++edge )
3669 for ( TopoDS_Iterator v( *edge ); v.More(); v.Next() )
3671 set<int> internalEdges;
3672 PShapeIteratorPtr eIt =
3673 SMESH_MesherHelper::GetAncestors( v.Value(),mesh,TopAbs_EDGE );
3674 while ( const TopoDS_Shape* pEdge = eIt->next() )
3676 int edgeID = meshDS->ShapeToIndex( *pEdge );
3677 if ( isInternalShape( edgeID ))
3678 internalEdges.insert( edgeID );
3680 if ( internalEdges.size() > 1 )
3681 _intShapes.insert( meshDS->ShapeToIndex( v.Value() ));
3685 } // loop on geom faces
3687 // find vertices internal in solids
3690 for ( TopExp_Explorer so(shape, TopAbs_SOLID); so.More(); so.Next())
3692 int soID = meshDS->ShapeToIndex( so.Current() );
3693 for ( TopoDS_Iterator soSub( so.Current() ); soSub.More(); soSub.Next())
3694 if ( soSub.Value().ShapeType() == TopAbs_VERTEX )
3695 _s2v[ soID ].push_back( meshDS->ShapeToIndex( soSub.Value() ));
3700 //================================================================================
3702 * \brief Find mesh faces on non-internal geom faces sharing internal edge
3703 * some nodes of which are to be doubled to make the second border of the "crack"
3705 //================================================================================
3707 void NETGENPlugin_Internals::findBorderElements( TIDSortedElemSet & borderElems )
3709 if ( _intShapes.empty() ) return;
3711 SMESH_Mesh& mesh = const_cast<SMESH_Mesh&>(_mesh);
3712 SMESHDS_Mesh* meshDS = mesh.GetMeshDS();
3714 // loop on internal geom edges
3715 set<int>::const_iterator intShapeId = _intShapes.begin();
3716 for ( ; intShapeId != _intShapes.end(); ++intShapeId )
3718 const TopoDS_Shape& s = meshDS->IndexToShape( *intShapeId );
3719 if ( s.ShapeType() != TopAbs_EDGE ) continue;
3721 // get internal and non-internal geom faces sharing the internal edge <s>
3723 set<int>::iterator bordFace = _borderFaces.end();
3724 PShapeIteratorPtr faces = SMESH_MesherHelper::GetAncestors( s, _mesh, TopAbs_FACE );
3725 while ( const TopoDS_Shape* pFace = faces->next() )
3727 int faceID = meshDS->ShapeToIndex( *pFace );
3728 if ( isInternalShape( faceID ))
3731 bordFace = _borderFaces.insert( faceID ).first;
3733 if ( bordFace == _borderFaces.end() || !intFace ) continue;
3735 // get all links of mesh faces on internal geom face sharing nodes on edge <s>
3736 set< SMESH_OrientedLink > links; //!< links of faces on internal geom face
3737 list<const SMDS_MeshElement*> suspectFaces[2]; //!< mesh faces on border geom faces
3738 int nbSuspectFaces = 0;
3739 SMESHDS_SubMesh* intFaceSM = meshDS->MeshElements( intFace );
3740 if ( !intFaceSM || intFaceSM->NbElements() == 0 ) continue;
3741 SMESH_subMeshIteratorPtr smIt = mesh.GetSubMesh( s )->getDependsOnIterator(true,true);
3742 while ( smIt->more() )
3744 SMESHDS_SubMesh* sm = smIt->next()->GetSubMeshDS();
3745 if ( !sm ) continue;
3746 SMDS_NodeIteratorPtr nIt = sm->GetNodes();
3747 while ( nIt->more() )
3749 const SMDS_MeshNode* nOnEdge = nIt->next();
3750 SMDS_ElemIteratorPtr fIt = nOnEdge->GetInverseElementIterator(SMDSAbs_Face);
3751 while ( fIt->more() )
3753 const SMDS_MeshElement* f = fIt->next();
3754 const int nbNodes = f->NbCornerNodes();
3755 if ( intFaceSM->Contains( f ))
3757 for ( int i = 0; i < nbNodes; ++i )
3758 links.insert( SMESH_OrientedLink( f->GetNode(i), f->GetNode((i+1)%nbNodes)));
3763 for ( int i = 0; i < nbNodes; ++i )
3764 nbDblNodes += isInternalShape( f->GetNode(i)->getshapeId() );
3766 suspectFaces[ nbDblNodes < 2 ].push_back( f );
3772 // suspectFaces[0] having link with same orientation as mesh faces on
3773 // the internal geom face are <borderElems>. suspectFaces[1] have
3774 // only one node on edge <s>, we decide on them later (at the 2nd loop)
3775 // by links of <borderElems> found at the 1st and 2nd loops
3776 set< SMESH_OrientedLink > borderLinks;
3777 for ( int isPostponed = 0; isPostponed < 2; ++isPostponed )
3779 list<const SMDS_MeshElement*>::iterator fIt = suspectFaces[isPostponed].begin();
3780 for ( int nbF = 0; fIt != suspectFaces[isPostponed].end(); ++fIt, ++nbF )
3782 const SMDS_MeshElement* f = *fIt;
3783 bool isBorder = false, linkFound = false, borderLinkFound = false;
3784 list< SMESH_OrientedLink > faceLinks;
3785 int nbNodes = f->NbCornerNodes();
3786 for ( int i = 0; i < nbNodes; ++i )
3788 SMESH_OrientedLink link( f->GetNode(i), f->GetNode((i+1)%nbNodes));
3789 faceLinks.push_back( link );
3792 set< SMESH_OrientedLink >::iterator foundLink = links.find( link );
3793 if ( foundLink != links.end() )
3796 isBorder = ( foundLink->_reversed == link._reversed );
3797 if ( !isBorder && !isPostponed ) break;
3798 faceLinks.pop_back();
3800 else if ( isPostponed && !borderLinkFound )
3802 foundLink = borderLinks.find( link );
3803 if ( foundLink != borderLinks.end() )
3805 borderLinkFound = true;
3806 isBorder = ( foundLink->_reversed != link._reversed );
3813 borderElems.insert( f );
3814 borderLinks.insert( faceLinks.begin(), faceLinks.end() );
3816 else if ( !linkFound && !borderLinkFound )
3818 suspectFaces[1].push_back( f );
3819 if ( nbF > 2 * nbSuspectFaces )
3820 break; // dead loop protection
3827 //================================================================================
3829 * \brief put internal shapes in maps and fill in submeshes to precompute
3831 //================================================================================
3833 void NETGENPlugin_Internals::getInternalEdges( TopTools_IndexedMapOfShape& fmap,
3834 TopTools_IndexedMapOfShape& emap,
3835 TopTools_IndexedMapOfShape& vmap,
3836 list< SMESH_subMesh* > smToPrecompute[])
3838 if ( !hasInternalEdges() ) return;
3839 map<int,int>::const_iterator ev_face = _e2face.begin();
3840 for ( ; ev_face != _e2face.end(); ++ev_face )
3842 const TopoDS_Shape& ev = _mesh.GetMeshDS()->IndexToShape( ev_face->first );
3843 const TopoDS_Shape& face = _mesh.GetMeshDS()->IndexToShape( ev_face->second );
3845 ( ev.ShapeType() == TopAbs_EDGE ? emap : vmap ).Add( ev );
3847 //cout<<"INTERNAL EDGE or VERTEX "<<ev_face->first<<" on face "<<ev_face->second<<endl;
3849 smToPrecompute[ MeshDim_1D ].push_back( _mesh.GetSubMeshContaining( ev_face->first ));
3853 //================================================================================
3855 * \brief return shapes and submeshes to be meshed and already meshed boundary submeshes
3857 //================================================================================
3859 void NETGENPlugin_Internals::getInternalFaces( TopTools_IndexedMapOfShape& fmap,
3860 TopTools_IndexedMapOfShape& emap,
3861 list< SMESH_subMesh* >& intFaceSM,
3862 list< SMESH_subMesh* >& boundarySM)
3864 if ( !hasInternalFaces() ) return;
3866 // <fmap> and <emap> are for not yet meshed shapes
3867 // <intFaceSM> is for submeshes of faces
3868 // <boundarySM> is for meshed edges and vertices
3873 set<int> shapeIDs ( _intShapes );
3874 if ( !_borderFaces.empty() )
3875 shapeIDs.insert( _borderFaces.begin(), _borderFaces.end() );
3877 set<int>::const_iterator intS = shapeIDs.begin();
3878 for ( ; intS != shapeIDs.end(); ++intS )
3880 SMESH_subMesh* sm = _mesh.GetSubMeshContaining( *intS );
3882 if ( sm->GetSubShape().ShapeType() != TopAbs_FACE ) continue;
3884 intFaceSM.push_back( sm );
3886 // add submeshes of not computed internal faces
3887 if ( !sm->IsEmpty() ) continue;
3889 SMESH_subMeshIteratorPtr smIt = sm->getDependsOnIterator(true,true);
3890 while ( smIt->more() )
3893 const TopoDS_Shape& s = sm->GetSubShape();
3895 if ( sm->IsEmpty() )
3898 switch ( s.ShapeType() ) {
3899 case TopAbs_FACE: fmap.Add ( s ); break;
3900 case TopAbs_EDGE: emap.Add ( s ); break;
3906 if ( s.ShapeType() != TopAbs_FACE )
3907 boundarySM.push_back( sm );
3913 //================================================================================
3915 * \brief Return true if given shape is to be precomputed in order to be correctly
3916 * added to netgen mesh
3918 //================================================================================
3920 bool NETGENPlugin_Internals::isShapeToPrecompute(const TopoDS_Shape& s)
3922 int shapeID = _mesh.GetMeshDS()->ShapeToIndex( s );
3923 switch ( s.ShapeType() ) {
3924 case TopAbs_FACE : break; //return isInternalShape( shapeID ) || isBorderFace( shapeID );
3925 case TopAbs_EDGE : return isInternalEdge( shapeID );
3926 case TopAbs_VERTEX: break;
3932 //================================================================================
3934 * \brief Return SMESH
3936 //================================================================================
3938 SMESH_Mesh& NETGENPlugin_Internals::getMesh() const
3940 return const_cast<SMESH_Mesh&>( _mesh );
3943 //================================================================================
3945 * \brief Access to a counter of NETGENPlugin_NetgenLibWrapper instances
3947 //================================================================================
3949 int& NETGENPlugin_NetgenLibWrapper::instanceCounter()
3951 static int theCouner = 0;
3955 //================================================================================
3957 * \brief Initialize netgen library
3959 //================================================================================
3961 NETGENPlugin_NetgenLibWrapper::NETGENPlugin_NetgenLibWrapper()
3963 if ( instanceCounter() == 0 )
3966 ++instanceCounter();
3968 _isComputeOk = false;
3972 if ( !getenv( "KEEP_NETGEN_OUTPUT" ))
3974 // redirect all netgen output (mycout,myerr,cout) to _outputFileName
3975 _outputFileName = getOutputFileName();
3976 _ngcout = netgen::mycout;
3977 _ngcerr = netgen::myerr;
3978 netgen::mycout = new ofstream ( _outputFileName.c_str() );
3979 netgen::myerr = netgen::mycout;
3980 _coutBuffer = std::cout.rdbuf();
3982 cout << "NOTE: netgen output is redirected to file " << _outputFileName << endl;
3984 std::cout.rdbuf( netgen::mycout->rdbuf() );
3988 _ngMesh = Ng_NewMesh();
3991 //================================================================================
3993 * \brief Finish using netgen library
3995 //================================================================================
3997 NETGENPlugin_NetgenLibWrapper::~NETGENPlugin_NetgenLibWrapper()
3999 --instanceCounter();
4001 Ng_DeleteMesh( _ngMesh );
4005 std::cout.rdbuf( _coutBuffer );
4012 //================================================================================
4014 * \brief Set netgen mesh to delete at destruction
4016 //================================================================================
4018 void NETGENPlugin_NetgenLibWrapper::setMesh( Ng_Mesh* mesh )
4021 Ng_DeleteMesh( _ngMesh );
4025 //================================================================================
4027 * \brief Return a unique file name
4029 //================================================================================
4031 std::string NETGENPlugin_NetgenLibWrapper::getOutputFileName()
4033 std::string aTmpDir = SALOMEDS_Tool::GetTmpDir();
4035 TCollection_AsciiString aGenericName = (char*)aTmpDir.c_str();
4036 aGenericName += "NETGEN_";
4038 aGenericName += getpid();
4040 aGenericName += _getpid();
4042 aGenericName += "_";
4043 aGenericName += Abs((Standard_Integer)(long) aGenericName.ToCString());
4044 aGenericName += ".out";
4046 return aGenericName.ToCString();
4049 //================================================================================
4051 * \brief Remove "test.out" and "problemfaces" files in current directory
4053 //================================================================================
4055 void NETGENPlugin_NetgenLibWrapper::RemoveTmpFiles()
4057 bool rm = SMESH_File("test.out").remove() ;
4059 if ( rm && netgen::testout && instanceCounter() == 0 )
4061 delete netgen::testout;
4062 netgen::testout = 0;
4065 SMESH_File("problemfaces").remove();
4066 SMESH_File("occmesh.rep").remove();
4069 //================================================================================
4071 * \brief Remove file with netgen output
4073 //================================================================================
4075 void NETGENPlugin_NetgenLibWrapper::removeOutputFile()
4077 if ( !_outputFileName.empty() )
4081 delete netgen::mycout;
4082 netgen::mycout = _ngcout;
4083 netgen::myerr = _ngcerr;
4086 string tmpDir = SALOMEDS_Tool::GetDirFromPath ( _outputFileName );
4087 string aFileName = SALOMEDS_Tool::GetNameFromPath( _outputFileName ) + ".out";
4088 SALOMEDS_Tool::ListOfFiles aFiles;
4090 aFiles.push_back(aFileName.c_str());
4092 SALOMEDS_Tool::RemoveTemporaryFiles( tmpDir.c_str(), aFiles, true );