-// NETGENPlugin : C++ implementation
+// Copyright (C) 2007-2014 CEA/DEN, EDF R&D, OPEN CASCADE
//
-// Copyright (C) 2006 OPEN CASCADE, CEA/DEN, EDF R&D
-//
-// This library is free software; you can redistribute it and/or
-// modify it under the terms of the GNU Lesser General Public
-// License as published by the Free Software Foundation; either
-// version 2.1 of the License.
-//
-// This library is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-// Lesser General Public License for more details.
-//
-// You should have received a copy of the GNU Lesser General Public
-// License along with this library; if not, write to the Free Software
-// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-//
-// See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
+// Copyright (C) 2003-2007 OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
+// CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Lesser General Public
+// License as published by the Free Software Foundation; either
+// version 2.1 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+// Lesser General Public License for more details.
//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
+// See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
+//
+
+// NETGENPlugin : C++ implementation
// File : NETGENPlugin_Mesher.cxx
// Author : Michael Sazonov (OCN)
// Date : 31/03/2006
// Project : SALOME
-// $Header$
//=============================================================================
-using namespace std;
#include "NETGENPlugin_Mesher.hxx"
#include "NETGENPlugin_Hypothesis_2D.hxx"
+#include "NETGENPlugin_SimpleHypothesis_3D.hxx"
-#include <SMESHDS_Mesh.hxx>
+#include <SMDS_FaceOfNodes.hxx>
#include <SMDS_MeshElement.hxx>
#include <SMDS_MeshNode.hxx>
-#include <utilities.h>
+#include <SMESHDS_Mesh.hxx>
+#include <SMESH_Block.hxx>
+#include <SMESH_Comment.hxx>
+#include <SMESH_ComputeError.hxx>
+#include <SMESH_File.hxx>
+#include <SMESH_Gen_i.hxx>
+#include <SMESH_Mesh.hxx>
+#include <SMESH_MesherHelper.hxx>
+#include <SMESH_subMesh.hxx>
+#include <StdMeshers_QuadToTriaAdaptor.hxx>
+#include <StdMeshers_ViscousLayers2D.hxx>
-#include <vector>
+#include <SALOMEDS_Tool.hxx>
+
+#include <utilities.h>
+#include <BRepBuilderAPI_Copy.hxx>
#include <BRep_Tool.hxx>
+#include <Bnd_B3d.hxx>
+#include <NCollection_Map.hxx>
+#include <Standard_ErrorHandler.hxx>
+#include <Standard_ProgramError.hxx>
#include <TopExp.hxx>
#include <TopExp_Explorer.hxx>
+#include <TopTools_DataMapIteratorOfDataMapOfShapeInteger.hxx>
+#include <TopTools_DataMapIteratorOfDataMapOfShapeShape.hxx>
+#include <TopTools_DataMapOfShapeInteger.hxx>
+#include <TopTools_DataMapOfShapeShape.hxx>
+#include <TopTools_MapOfShape.hxx>
#include <TopoDS.hxx>
-#include <NCollection_Map.hxx>
+#include <OSD_File.hxx>
+#include <OSD_Path.hxx>
// Netgen include files
-namespace nglib {
-#include <nglib.h>
-}
+#ifndef OCCGEOMETRY
#define OCCGEOMETRY
+#endif
#include <occgeom.hpp>
#include <meshing.hpp>
//#include <ngexception.hpp>
namespace netgen {
+#ifdef NETGEN_V5
+ extern int OCCGenerateMesh (OCCGeometry&, Mesh*&, MeshingParameters&, int, int);
+#else
extern int OCCGenerateMesh (OCCGeometry&, Mesh*&, int, int, char*);
+#endif
+ //extern void OCCSetLocalMeshSize(OCCGeometry & geom, Mesh & mesh);
extern MeshingParameters mparam;
+ extern volatile multithreadt multithread;
+ extern bool merge_solids;
}
+#include <vector>
+#include <limits>
+
+#ifdef WIN32
+#include <process.h>
+#endif
+using namespace nglib;
+using namespace std;
+
+#ifdef _DEBUG_
+#define nodeVec_ACCESS(index) ((SMDS_MeshNode*) nodeVec.at((index)))
+#else
+#define nodeVec_ACCESS(index) ((SMDS_MeshNode*) nodeVec[index])
+#endif
+
+#define NGPOINT_COORDS(p) p(0),p(1),p(2)
+
+// dump elements added to ng mesh
+//#define DUMP_SEGMENTS
+//#define DUMP_TRIANGLES
+//#define DUMP_TRIANGLES_SCRIPT "/tmp/trias.py" //!< debug AddIntVerticesInSolids()
+
+TopTools_IndexedMapOfShape ShapesWithLocalSize;
+std::map<int,double> VertexId2LocalSize;
+std::map<int,double> EdgeId2LocalSize;
+std::map<int,double> FaceId2LocalSize;
+
//=============================================================================
/*!
*
*/
//=============================================================================
-NETGENPlugin_Mesher::NETGENPlugin_Mesher (SMESHDS_Mesh* meshDS,
+NETGENPlugin_Mesher::NETGENPlugin_Mesher (SMESH_Mesh* mesh,
const TopoDS_Shape& aShape,
- const bool isVolume)
- : _meshDS (meshDS),
+ const bool isVolume)
+ : _mesh (mesh),
_shape (aShape),
_isVolume(isVolume),
- _optimize(true)
+ _optimize(true),
+ _fineness(NETGENPlugin_Hypothesis::GetDefaultFineness()),
+ _isViscousLayers2D(false),
+ _ngMesh(NULL),
+ _occgeom(NULL),
+ _curShapeIndex(-1),
+ _progressTic(1),
+ _totalTime(1.0),
+ _simpleHyp(NULL),
+ _ptrToMe(NULL)
+{
+ SetDefaultParameters();
+ ShapesWithLocalSize.Clear();
+ VertexId2LocalSize.clear();
+ EdgeId2LocalSize.clear();
+ FaceId2LocalSize.clear();
+}
+
+//================================================================================
+/*!
+ * Destuctor
+ */
+//================================================================================
+
+NETGENPlugin_Mesher::~NETGENPlugin_Mesher()
{
- // Initialize global NETGEN parameters by default values:
+ if ( _ptrToMe )
+ *_ptrToMe = NULL;
+ _ptrToMe = 0;
+ _ngMesh = NULL;
+}
+
+//================================================================================
+/*!
+ * Set pointer to NETGENPlugin_Mesher* field of the holder, that will be
+ * nullified at destruction of this
+ */
+//================================================================================
+
+void NETGENPlugin_Mesher::SetSelfPointer( NETGENPlugin_Mesher ** ptr )
+{
+ if ( _ptrToMe )
+ *_ptrToMe = NULL;
+
+ _ptrToMe = ptr;
+
+ if ( _ptrToMe )
+ *_ptrToMe = this;
+}
+
+//================================================================================
+/*!
+ * \brief Initialize global NETGEN parameters with default values
+ */
+//================================================================================
+
+void NETGENPlugin_Mesher::SetDefaultParameters()
+{
+ netgen::MeshingParameters& mparams = netgen::mparam;
// maximal mesh edge size
- netgen::mparam.maxh = NETGENPlugin_Hypothesis::GetDefaultMaxSize();
+ mparams.maxh = 0;//NETGENPlugin_Hypothesis::GetDefaultMaxSize();
+ mparams.minh = 0;
// minimal number of segments per edge
- netgen::mparam.segmentsperedge = NETGENPlugin_Hypothesis::GetDefaultNbSegPerEdge();
+ mparams.segmentsperedge = NETGENPlugin_Hypothesis::GetDefaultNbSegPerEdge();
// rate of growth of size between elements
- netgen::mparam.grading = NETGENPlugin_Hypothesis::GetDefaultGrowthRate();
+ mparams.grading = NETGENPlugin_Hypothesis::GetDefaultGrowthRate();
// safety factor for curvatures (elements per radius)
- netgen::mparam.curvaturesafety = NETGENPlugin_Hypothesis::GetDefaultNbSegPerRadius();
+ mparams.curvaturesafety = NETGENPlugin_Hypothesis::GetDefaultNbSegPerRadius();
// create elements of second order
- netgen::mparam.secondorder = NETGENPlugin_Hypothesis::GetDefaultSecondOrder() ? 1 : 0;
+ mparams.secondorder = NETGENPlugin_Hypothesis::GetDefaultSecondOrder();
// quad-dominated surface meshing
if (_isVolume)
- netgen::mparam.quad = 0;
+ mparams.quad = 0;
+ else
+ mparams.quad = NETGENPlugin_Hypothesis_2D::GetDefaultQuadAllowed();
+ _fineness = NETGENPlugin_Hypothesis::GetDefaultFineness();
+ mparams.uselocalh = NETGENPlugin_Hypothesis::GetDefaultSurfaceCurvature();
+ netgen::merge_solids = NETGENPlugin_Hypothesis::GetDefaultFuseEdges();
+}
+
+//=============================================================================
+/*!
+ *
+ */
+//=============================================================================
+void SetLocalSize(TopoDS_Shape GeomShape, double LocalSize)
+{
+ TopAbs_ShapeEnum GeomType = GeomShape.ShapeType();
+ if (GeomType == TopAbs_COMPOUND) {
+ for (TopoDS_Iterator it (GeomShape); it.More(); it.Next()) {
+ SetLocalSize(it.Value(), LocalSize);
+ }
+ return;
+ }
+ int key;
+ if (! ShapesWithLocalSize.Contains(GeomShape))
+ key = ShapesWithLocalSize.Add(GeomShape);
else
- netgen::mparam.quad = NETGENPlugin_Hypothesis_2D::GetDefaultQuadAllowed() ? 1 : 0;
+ key = ShapesWithLocalSize.FindIndex(GeomShape);
+ if (GeomType == TopAbs_VERTEX) {
+ VertexId2LocalSize[key] = LocalSize;
+ } else if (GeomType == TopAbs_EDGE) {
+ EdgeId2LocalSize[key] = LocalSize;
+ } else if (GeomType == TopAbs_FACE) {
+ FaceId2LocalSize[key] = LocalSize;
+ }
}
//=============================================================================
{
if (hyp)
{
+ netgen::MeshingParameters& mparams = netgen::mparam;
// Initialize global NETGEN parameters:
// maximal mesh segment size
- netgen::mparam.maxh = hyp->GetMaxSize();
+ mparams.maxh = hyp->GetMaxSize();
+ // maximal mesh element linear size
+ mparams.minh = hyp->GetMinSize();
// minimal number of segments per edge
- netgen::mparam.segmentsperedge = hyp->GetNbSegPerEdge();
+ mparams.segmentsperedge = hyp->GetNbSegPerEdge();
// rate of growth of size between elements
- netgen::mparam.grading = hyp->GetGrowthRate();
+ mparams.grading = hyp->GetGrowthRate();
// safety factor for curvatures (elements per radius)
- netgen::mparam.curvaturesafety = hyp->GetNbSegPerRadius();
+ mparams.curvaturesafety = hyp->GetNbSegPerRadius();
// create elements of second order
- netgen::mparam.secondorder = hyp->GetSecondOrder() ? 1 : 0;
+ mparams.secondorder = hyp->GetSecondOrder() ? 1 : 0;
// quad-dominated surface meshing
- // only triangles are allowed for volumic mesh
- if (!_isVolume)
- netgen::mparam.quad = static_cast<const NETGENPlugin_Hypothesis_2D*>
- (hyp)->GetQuadAllowed() ? 1 : 0;
- _optimize = hyp->GetOptimize();
+ // only triangles are allowed for volumic mesh (before realizing IMP 0021676)
+ //if (!_isVolume)
+ mparams.quad = hyp->GetQuadAllowed() ? 1 : 0;
+ _optimize = hyp->GetOptimize();
+ _fineness = hyp->GetFineness();
+ mparams.uselocalh = hyp->GetSurfaceCurvature();
+ netgen::merge_solids = hyp->GetFuseEdges();
+ _simpleHyp = NULL;
+
+ SMESH_Gen_i* smeshGen_i = SMESH_Gen_i::GetSMESHGen();
+ CORBA::Object_var anObject = smeshGen_i->GetNS()->Resolve("/myStudyManager");
+ SALOMEDS::StudyManager_var aStudyMgr = SALOMEDS::StudyManager::_narrow(anObject);
+ SALOMEDS::Study_var myStudy = aStudyMgr->GetStudyByID(hyp->GetStudyId());
+
+ const NETGENPlugin_Hypothesis::TLocalSize localSizes = hyp->GetLocalSizesAndEntries();
+ NETGENPlugin_Hypothesis::TLocalSize::const_iterator it = localSizes.begin();
+ for (it ; it != localSizes.end() ; it++)
+ {
+ std::string entry = (*it).first;
+ double val = (*it).second;
+ // --
+ GEOM::GEOM_Object_var aGeomObj;
+ TopoDS_Shape S = TopoDS_Shape();
+ SALOMEDS::SObject_var aSObj = myStudy->FindObjectID( entry.c_str() );
+ if (!aSObj->_is_nil()) {
+ CORBA::Object_var obj = aSObj->GetObject();
+ aGeomObj = GEOM::GEOM_Object::_narrow(obj);
+ aSObj->UnRegister();
+ }
+ if ( !aGeomObj->_is_nil() )
+ S = smeshGen_i->GeomObjectToShape( aGeomObj.in() );
+ // --
+ SetLocalSize(S, val);
+ }
}
}
+//=============================================================================
+/*!
+ * Pass simple parameters to NETGEN
+ */
+//=============================================================================
+
+void NETGENPlugin_Mesher::SetParameters(const NETGENPlugin_SimpleHypothesis_2D* hyp)
+{
+ _simpleHyp = hyp;
+ if ( _simpleHyp )
+ SetDefaultParameters();
+}
+
//=============================================================================
/*!
* Link - a pair of integer numbers
aLink1.n1 == aLink2.n2 && aLink1.n2 == aLink2.n1);
}
-//=============================================================================
-/*!
- * Here we are going to use the NETGEN mesher
- */
-//=============================================================================
-bool NETGENPlugin_Mesher::Compute()
+namespace
{
- MESSAGE("Compute with:\n"
- " max size = " << netgen::mparam.maxh << "\n"
- " segments per edge = " << netgen::mparam.segmentsperedge);
- MESSAGE("\n"
- " growth rate = " << netgen::mparam.grading << "\n"
- " elements per radius = " << netgen::mparam.curvaturesafety << "\n"
- " second order = " << netgen::mparam.secondorder << "\n"
- " quad allowed = " << netgen::mparam.quad);
+ //================================================================================
+ /*!
+ * \brief return id of netgen point corresponding to SMDS node
+ */
+ //================================================================================
+ typedef map< const SMDS_MeshNode*, int > TNode2IdMap;
- nglib::Ng_Init();
+ int ngNodeId( const SMDS_MeshNode* node,
+ netgen::Mesh& ngMesh,
+ TNode2IdMap& nodeNgIdMap)
+ {
+ int newNgId = ngMesh.GetNP() + 1;
- // -------------------------
- // Prepare OCC geometry
- // -------------------------
+ TNode2IdMap::iterator node_id = nodeNgIdMap.insert( make_pair( node, newNgId )).first;
+
+ if ( node_id->second == newNgId)
+ {
+#if defined(DUMP_SEGMENTS) || defined(DUMP_TRIANGLES)
+ cout << "Ng " << newNgId << " - " << node;
+#endif
+ netgen::MeshPoint p( netgen::Point<3> (node->X(), node->Y(), node->Z()) );
+ ngMesh.AddPoint( p );
+ }
+ return node_id->second;
+ }
+
+ //================================================================================
+ /*!
+ * \brief Return computed EDGEs connected to the given one
+ */
+ //================================================================================
+
+ list< TopoDS_Edge > getConnectedEdges( const TopoDS_Edge& edge,
+ const TopoDS_Face& face,
+ const set< SMESH_subMesh* > & computedSM,
+ const SMESH_MesherHelper& helper,
+ map< SMESH_subMesh*, set< int > >& addedEdgeSM2Faces)
+ {
+ // get ordered EDGEs
+ list< TopoDS_Edge > edges;
+ list< int > nbEdgesInWire;
+ int nbWires = SMESH_Block::GetOrderedEdges( face, edges, nbEdgesInWire);
+
+ // find <edge> within <edges>
+ list< TopoDS_Edge >::iterator eItFwd = edges.begin();
+ for ( ; eItFwd != edges.end(); ++eItFwd )
+ if ( edge.IsSame( *eItFwd ))
+ break;
+ if ( eItFwd == edges.end()) return list< TopoDS_Edge>();
+
+ if ( eItFwd->Orientation() >= TopAbs_INTERNAL )
+ {
+ // connected INTERNAL edges returned from GetOrderedEdges() are wrongly oriented
+ // so treat each INTERNAL edge separately
+ TopoDS_Edge e = *eItFwd;
+ edges.clear();
+ edges.push_back( e );
+ return edges;
+ }
+
+ // get all computed EDGEs connected to <edge>
+
+ list< TopoDS_Edge >::iterator eItBack = eItFwd, ePrev;
+ TopoDS_Vertex vCommon;
+ TopTools_MapOfShape eAdded; // map used not to add a seam edge twice to <edges>
+ eAdded.Add( edge );
+
+ // put edges before <edge> to <edges> back
+ while ( edges.begin() != eItFwd )
+ edges.splice( edges.end(), edges, edges.begin() );
+
+ // search forward
+ ePrev = eItFwd;
+ while ( ++eItFwd != edges.end() )
+ {
+ SMESH_subMesh* sm = helper.GetMesh()->GetSubMesh( *eItFwd );
+
+ bool connected = TopExp::CommonVertex( *ePrev, *eItFwd, vCommon );
+ bool computed = sm->IsMeshComputed();
+ bool added = addedEdgeSM2Faces[ sm ].count( helper.GetSubShapeID() );
+ bool doubled = !eAdded.Add( *eItFwd );
+ bool orientOK = (( ePrev ->Orientation() < TopAbs_INTERNAL ) ==
+ ( eItFwd->Orientation() < TopAbs_INTERNAL ) );
+ if ( !connected || !computed || !orientOK || added || doubled )
+ {
+ // stop advancement; move edges from tail to head
+ while ( edges.back() != *ePrev )
+ edges.splice( edges.begin(), edges, --edges.end() );
+ break;
+ }
+ ePrev = eItFwd;
+ }
+ // search backward
+ while ( eItBack != edges.begin() )
+ {
+ ePrev = eItBack;
+ --eItBack;
+ SMESH_subMesh* sm = helper.GetMesh()->GetSubMesh( *eItBack );
+
+ bool connected = TopExp::CommonVertex( *ePrev, *eItBack, vCommon );
+ bool computed = sm->IsMeshComputed();
+ bool added = addedEdgeSM2Faces[ sm ].count( helper.GetSubShapeID() );
+ bool doubled = !eAdded.Add( *eItBack );
+ bool orientOK = (( ePrev ->Orientation() < TopAbs_INTERNAL ) ==
+ ( eItBack->Orientation() < TopAbs_INTERNAL ) );
+ if ( !connected || !computed || !orientOK || added || doubled)
+ {
+ // stop advancement
+ edges.erase( edges.begin(), ePrev );
+ break;
+ }
+ }
+ if ( edges.front() != edges.back() )
+ {
+ // assure that the 1st vertex is meshed
+ TopoDS_Edge eLast = edges.back();
+ while ( !SMESH_Algo::VertexNode( SMESH_MesherHelper::IthVertex( 0, edges.front()), helper.GetMeshDS())
+ &&
+ edges.front() != eLast )
+ edges.splice( edges.end(), edges, edges.begin() );
+ }
+ return edges;
+ }
+
+ //================================================================================
+ /*!
+ * \brief Make triangulation of a shape precise enough
+ */
+ //================================================================================
+
+ void updateTriangulation( const TopoDS_Shape& shape )
+ {
+ // static set< Poly_Triangulation* > updated;
+
+ // TopLoc_Location loc;
+ // TopExp_Explorer fExp( shape, TopAbs_FACE );
+ // for ( ; fExp.More(); fExp.Next() )
+ // {
+ // Handle(Poly_Triangulation) triangulation =
+ // BRep_Tool::Triangulation ( TopoDS::Face( fExp.Current() ), loc);
+ // if ( triangulation.IsNull() ||
+ // updated.insert( triangulation.operator->() ).second )
+ // {
+ // BRepTools::Clean (shape);
+ try {
+ OCC_CATCH_SIGNALS;
+ BRepMesh_IncrementalMesh e(shape, 0.01, true);
+ }
+ catch (Standard_Failure)
+ {
+ }
+ // updated.erase( triangulation.operator->() );
+ // triangulation = BRep_Tool::Triangulation ( TopoDS::Face( fExp.Current() ), loc);
+ // updated.insert( triangulation.operator->() );
+ // }
+ // }
+ }
+}
+
+//================================================================================
+/*!
+ * \brief Initialize netgen::OCCGeometry with OCCT shape
+ */
+//================================================================================
+
+void NETGENPlugin_Mesher::PrepareOCCgeometry(netgen::OCCGeometry& occgeo,
+ const TopoDS_Shape& shape,
+ SMESH_Mesh& mesh,
+ list< SMESH_subMesh* > * meshedSM,
+ NETGENPlugin_Internals* intern)
+{
+ updateTriangulation( shape );
- netgen::OCCGeometry occgeo;
- occgeo.shape = _shape;
- occgeo.changed = 1;
- occgeo.BuildFMap();
- BRepTools::Clean (_shape);
- BRepMesh_IncrementalMesh::BRepMesh_IncrementalMesh (_shape, 0.01, true);
Bnd_Box bb;
- BRepBndLib::Add (_shape, bb);
+ BRepBndLib::Add (shape, bb);
double x1,y1,z1,x2,y2,z2;
bb.Get (x1,y1,z1,x2,y2,z2);
MESSAGE("shape bounding box:\n" <<
netgen::Point<3> p2 = netgen::Point<3> (x2,y2,z2);
occgeo.boundingbox = netgen::Box<3> (p1,p2);
- // -------------------------
- // Generate the mesh
- // -------------------------
+ occgeo.shape = shape;
+ occgeo.changed = 1;
- netgen::Mesh *ngMesh = NULL;
- // we start always with ANALYSE,
- // but end depending on _optimize and _isVolume
- int startWith = netgen::MESHCONST_ANALYSE;
- int endWith = (_optimize
- ? (_isVolume ? netgen::MESHCONST_OPTVOLUME : netgen::MESHCONST_OPTSURFACE)
- : netgen::MESHCONST_MESHSURFACE);
- char *optstr;
+ // fill maps of shapes of occgeo with not yet meshed subshapes
- int err = 0;
- try
- {
- err = netgen::OCCGenerateMesh(occgeo, ngMesh, startWith, endWith, optstr);
- if (!err && !_optimize)
+ // get root submeshes
+ list< SMESH_subMesh* > rootSM;
+ const int shapeID = mesh.GetMeshDS()->ShapeToIndex( shape );
+ if ( shapeID > 0 ) { // SMESH_subMesh with ID 0 may exist, don't use it!
+ rootSM.push_back( mesh.GetSubMesh( shape ));
+ }
+ else {
+ for ( TopoDS_Iterator it( shape ); it.More(); it.Next() )
+ rootSM.push_back( mesh.GetSubMesh( it.Value() ));
+ }
+
+ // add subshapes of empty submeshes
+ list< SMESH_subMesh* >::iterator rootIt = rootSM.begin(), rootEnd = rootSM.end();
+ for ( ; rootIt != rootEnd; ++rootIt ) {
+ SMESH_subMesh * root = *rootIt;
+ SMESH_subMeshIteratorPtr smIt = root->getDependsOnIterator(/*includeSelf=*/true,
+ /*complexShapeFirst=*/true);
+ // to find a right orientation of subshapes (PAL20462)
+ TopTools_IndexedMapOfShape subShapes;
+ TopExp::MapShapes(root->GetSubShape(), subShapes);
+ while ( smIt->more() )
{
- // we have got surface mesh only, so generate volume mesh
- startWith = endWith = netgen::MESHCONST_MESHVOLUME;
- err = netgen::OCCGenerateMesh(occgeo, ngMesh, startWith, endWith, optstr);
+ SMESH_subMesh* sm = smIt->next();
+ TopoDS_Shape shape = sm->GetSubShape();
+ if ( intern && intern->isShapeToPrecompute( shape ))
+ continue;
+ if ( !meshedSM || sm->IsEmpty() )
+ {
+ if ( shape.ShapeType() != TopAbs_VERTEX )
+ shape = subShapes( subShapes.FindIndex( shape ));// shape -> index -> oriented shape
+ if ( shape.Orientation() >= TopAbs_INTERNAL )
+ shape.Orientation( TopAbs_FORWARD ); // isuue 0020676
+ switch ( shape.ShapeType() ) {
+ case TopAbs_FACE : occgeo.fmap.Add( shape ); break;
+ case TopAbs_EDGE : occgeo.emap.Add( shape ); break;
+ case TopAbs_VERTEX: occgeo.vmap.Add( shape ); break;
+ case TopAbs_SOLID :occgeo.somap.Add( shape ); break;
+ default:;
+ }
+ }
+ // collect submeshes of meshed shapes
+ else if (meshedSM)
+ {
+ const int dim = SMESH_Gen::GetShapeDim( shape );
+ meshedSM[ dim ].push_back( sm );
+ }
}
- if (!err && netgen::mparam.secondorder > 0)
+ }
+ occgeo.facemeshstatus.SetSize (occgeo.fmap.Extent());
+ occgeo.facemeshstatus = 0;
+ occgeo.face_maxh_modified.SetSize(occgeo.fmap.Extent());
+ occgeo.face_maxh_modified = 0;
+ occgeo.face_maxh.SetSize(occgeo.fmap.Extent());
+ occgeo.face_maxh = netgen::mparam.maxh;
+}
+
+//================================================================================
+/*!
+ * \brief Return a default min size value suitable for the given geometry.
+ */
+//================================================================================
+
+double NETGENPlugin_Mesher::GetDefaultMinSize(const TopoDS_Shape& geom,
+ const double maxSize)
+{
+ updateTriangulation( geom );
+
+ TopLoc_Location loc;
+ int i1, i2, i3;
+ const int* pi[4] = { &i1, &i2, &i3, &i1 };
+ double minh = 1e100;
+ Bnd_B3d bb;
+ TopExp_Explorer fExp( geom, TopAbs_FACE );
+ for ( ; fExp.More(); fExp.Next() )
+ {
+ Handle(Poly_Triangulation) triangulation =
+ BRep_Tool::Triangulation ( TopoDS::Face( fExp.Current() ), loc);
+ if ( triangulation.IsNull() ) continue;
+ const double fTol = BRep_Tool::Tolerance( TopoDS::Face( fExp.Current() ));
+ const TColgp_Array1OfPnt& points = triangulation->Nodes();
+ const Poly_Array1OfTriangle& trias = triangulation->Triangles();
+ for ( int iT = trias.Lower(); iT <= trias.Upper(); ++iT )
{
- netgen::OCCRefinementSurfaces ref (occgeo);
- ref.MakeSecondOrder (*ngMesh);
+ trias(iT).Get( i1, i2, i3 );
+ for ( int j = 0; j < 3; ++j )
+ {
+ double dist2 = points(*pi[j]).SquareDistance( points( *pi[j+1] ));
+ if ( dist2 < minh && fTol*fTol < dist2 )
+ minh = dist2;
+ bb.Add( points(*pi[j]));
+ }
}
}
- catch (netgen::NgException exc)
+ if ( minh > 0.25 * bb.SquareExtent() ) // simple geometry, rough triangulation
+ {
+ minh = 1e-3 * sqrt( bb.SquareExtent());
+ //cout << "BND BOX minh = " <<minh << endl;
+ }
+ else
{
- MESSAGE ("Exception in NETGEN: " << exc.What());
- err = 1;
+ minh = 3 * sqrt( minh ); // triangulation for visualization is rather fine
+ //cout << "TRIANGULATION minh = " <<minh << endl;
}
+ if ( minh > 0.5 * maxSize )
+ minh = maxSize / 3.;
- int nbNod = ngMesh->GetNP();
- int nbSeg = ngMesh->GetNSeg();
- int nbFac = ngMesh->GetNSE();
- int nbVol = ngMesh->GetNE();
+ return minh;
+}
- MESSAGE((err ? "Mesh Generation failure" : "End of Mesh Generation") <<
- ", nb nodes: " << nbNod <<
- ", nb segments: " << nbSeg <<
- ", nb faces: " << nbFac <<
- ", nb volumes: " << nbVol);
+//================================================================================
+/*!
+ * \brief Restrict size of elements at a given point
+ */
+//================================================================================
- // -----------------------------------------------------------
- // Feed back the SMESHDS with the generated Nodes and Elements
- // -----------------------------------------------------------
+void NETGENPlugin_Mesher::RestrictLocalSize(netgen::Mesh& ngMesh, const gp_XYZ& p, const double size)
+{
+ if ( netgen::mparam.minh > size )
+ {
+ ngMesh.SetMinimalH( size );
+ netgen::mparam.minh = size;
+ }
+ netgen::Point3d pi(p.X(), p.Y(), p.Z());
+ ngMesh.RestrictLocalH( pi, size );
+}
- bool isOK = ( !err && (_isVolume ? (nbVol > 0) : (nbFac > 0)) );
- if ( isOK )
- {
- // vector of nodes in which node index == netgen ID
- vector< SMDS_MeshNode* > nodeVec ( nbNod + 1 );
- // map of nodes assigned to submeshes
- NCollection_Map<int> pindMap;
- // create and insert nodes into nodeVec
- int i;
- for (i = 1; i <= nbNod && isOK; ++i )
- {
- const netgen::MeshPoint& ngPoint = ngMesh->Point(i);
- SMDS_MeshNode* node = NULL;
- bool newNodeOnVertex = false;
- TopoDS_Vertex aVert;
- if (i <= occgeo.vmap.Extent())
- {
- // point on vertex
- aVert = TopoDS::Vertex(occgeo.vmap(i));
- SMESHDS_SubMesh * submesh = _meshDS->MeshElements(aVert);
- if (submesh)
+//================================================================================
+/*!
+ * \brief fill ngMesh with nodes and elements of computed submeshes
+ */
+//================================================================================
+
+bool NETGENPlugin_Mesher::FillNgMesh(netgen::OCCGeometry& occgeom,
+ netgen::Mesh& ngMesh,
+ vector<const SMDS_MeshNode*>& nodeVec,
+ const list< SMESH_subMesh* > & meshedSM,
+ SMESH_ProxyMesh::Ptr proxyMesh)
+{
+ TNode2IdMap nodeNgIdMap;
+ for ( int i = 1; i < nodeVec.size(); ++i )
+ nodeNgIdMap.insert( make_pair( nodeVec[i], i ));
+
+ TopTools_MapOfShape visitedShapes;
+ map< SMESH_subMesh*, set< int > > visitedEdgeSM2Faces;
+ set< SMESH_subMesh* > computedSM( meshedSM.begin(), meshedSM.end() );
+
+ SMESH_MesherHelper helper (*_mesh);
+
+ int faceNgID = ngMesh.GetNFD();
+
+ list< SMESH_subMesh* >::const_iterator smIt, smEnd = meshedSM.end();
+ for ( smIt = meshedSM.begin(); smIt != smEnd; ++smIt )
+ {
+ SMESH_subMesh* sm = *smIt;
+ if ( !visitedShapes.Add( sm->GetSubShape() ))
+ continue;
+
+ const SMESHDS_SubMesh * smDS = sm->GetSubMeshDS();
+ if ( !smDS ) continue;
+
+ switch ( sm->GetSubShape().ShapeType() )
+ {
+ case TopAbs_EDGE: { // EDGE
+ // ----------------------
+ TopoDS_Edge geomEdge = TopoDS::Edge( sm->GetSubShape() );
+ if ( geomEdge.Orientation() >= TopAbs_INTERNAL )
+ geomEdge.Orientation( TopAbs_FORWARD ); // issue 0020676
+
+ // Add ng segments for each not meshed FACE the EDGE bounds
+ PShapeIteratorPtr fIt = helper.GetAncestors( geomEdge, *sm->GetFather(), TopAbs_FACE );
+ while ( const TopoDS_Shape * anc = fIt->next() )
+ {
+ faceNgID = occgeom.fmap.FindIndex( *anc );
+ if ( faceNgID < 1 )
+ continue; // meshed face
+
+ int faceSMDSId = helper.GetMeshDS()->ShapeToIndex( *anc );
+ if ( visitedEdgeSM2Faces[ sm ].count( faceSMDSId ))
+ continue; // already treated EDGE
+
+ TopoDS_Face face = TopoDS::Face( occgeom.fmap( faceNgID ));
+ if ( face.Orientation() >= TopAbs_INTERNAL )
+ face.Orientation( TopAbs_FORWARD ); // issue 0020676
+
+ // get all meshed EDGEs of the FACE connected to geomEdge (issue 0021140)
+ helper.SetSubShape( face );
+ list< TopoDS_Edge > edges = getConnectedEdges( geomEdge, face, computedSM, helper,
+ visitedEdgeSM2Faces );
+ if ( edges.empty() )
+ continue; // wrong ancestor?
+
+ // find out orientation of <edges> within <face>
+ TopoDS_Edge eNotSeam = edges.front();
+ if ( helper.HasSeam() )
{
- SMDS_NodeIteratorPtr it = submesh->GetNodes();
- if (it->more())
- {
- node = const_cast<SMDS_MeshNode*> (it->next());
- pindMap.Add(i);
- }
+ list< TopoDS_Edge >::iterator eIt = edges.begin();
+ while ( helper.IsRealSeam( *eIt )) ++eIt;
+ if ( eIt != edges.end() )
+ eNotSeam = *eIt;
}
- if (!node)
- newNodeOnVertex = true;
- }
- if (!node)
- node = _meshDS->AddNode(ngPoint.X(), ngPoint.Y(), ngPoint.Z());
- if (!node)
- {
- MESSAGE("Cannot create a mesh node");
- isOK = false;
- break;
- }
- nodeVec.at(i) = node;
- if (newNodeOnVertex)
- {
- // point on vertex
- _meshDS->SetNodeOnVertex(node, aVert);
- pindMap.Add(i);
- }
- }
+ TopAbs_Orientation fOri = helper.GetSubShapeOri( face, eNotSeam );
+ bool isForwad = ( fOri == eNotSeam.Orientation() || fOri >= TopAbs_INTERNAL );
- // create mesh segments along geometric edges
- NCollection_Map<Link> linkMap;
- for (i = 1; i <= nbSeg && isOK; ++i )
- {
- const netgen::Segment& seg = ngMesh->LineSegment(i);
- Link link(seg.p1, seg.p2);
- if (linkMap.Contains(link))
- continue;
- linkMap.Add(link);
- TopoDS_Edge aEdge;
- int pinds[3] = { seg.p1, seg.p2, seg.pmid };
- int nbp = 0;
- double param2 = 0;
- for (int j=0; j < 3; ++j)
- {
- int pind = pinds[j];
- if (pind <= 0) continue;
- ++nbp;
- double param;
- if (j < 2)
+ // get all nodes from connected <edges>
+ bool isQuad = smDS->NbElements() ? smDS->GetElements()->next()->IsQuadratic() : false;
+ StdMeshers_FaceSide fSide( face, edges, _mesh, isForwad, isQuad );
+ const vector<UVPtStruct>& points = fSide.GetUVPtStruct();
+ int i, nbSeg = fSide.NbSegments();
+
+ // remember EDGEs of fSide to treat only once
+ for ( int iE = 0; iE < fSide.NbEdges(); ++iE )
+ visitedEdgeSM2Faces[ helper.GetMesh()->GetSubMesh( fSide.Edge(iE )) ].insert(faceSMDSId);
+
+ double otherSeamParam = 0;
+ bool isSeam = false;
+
+ // add segments
+
+ int prevNgId = ngNodeId( points[0].node, ngMesh, nodeNgIdMap );
+
+ for ( i = 0; i < nbSeg; ++i )
{
- if (aEdge.IsNull())
+ const UVPtStruct& p1 = points[ i ];
+ const UVPtStruct& p2 = points[ i+1 ];
+
+ if ( p1.node->GetPosition()->GetTypeOfPosition() == SMDS_TOP_VERTEX ) //an EDGE begins
+ {
+ isSeam = false;
+ if ( helper.IsRealSeam( p1.node->getshapeId() ))
+ {
+ TopoDS_Edge e = fSide.Edge( fSide.EdgeIndex( 0.5 * ( p1.normParam + p2.normParam )));
+ isSeam = helper.IsRealSeam( e );
+ if ( isSeam )
+ {
+ otherSeamParam = helper.GetOtherParam( helper.GetPeriodicIndex() & 1 ? p2.u : p2.v );
+ }
+ }
+ }
+ netgen::Segment seg;
+ // ng node ids
+ seg[0] = prevNgId;
+ seg[1] = prevNgId = ngNodeId( p2.node, ngMesh, nodeNgIdMap );
+ // node param on curve
+ seg.epgeominfo[ 0 ].dist = p1.param;
+ seg.epgeominfo[ 1 ].dist = p2.param;
+ // uv on face
+ seg.epgeominfo[ 0 ].u = p1.u;
+ seg.epgeominfo[ 0 ].v = p1.v;
+ seg.epgeominfo[ 1 ].u = p2.u;
+ seg.epgeominfo[ 1 ].v = p2.v;
+
+ //geomEdge = fSide.Edge( fSide.EdgeIndex( 0.5 * ( p1.normParam + p2.normParam )));
+ //seg.epgeominfo[ 0 ].edgenr = seg.epgeominfo[ 1 ].edgenr = occgeom.emap.FindIndex( geomEdge );
+
+ //seg.epgeominfo[ iEnd ].edgenr = edgeID; // = geom.emap.FindIndex(edge);
+ seg.si = faceNgID; // = geom.fmap.FindIndex (face);
+ seg.edgenr = ngMesh.GetNSeg() + 1; // segment id
+ ngMesh.AddSegment (seg);
+
+ SMESH_TNodeXYZ np1( p1.node ), np2( p2.node );
+ RestrictLocalSize( ngMesh, 0.5*(np1+np2), (np1-np2).Modulus() );
+
+#ifdef DUMP_SEGMENTS
+ cout << "Segment: " << seg.edgenr << " on SMESH face " << helper.GetMeshDS()->ShapeToIndex( face ) << endl
+ << "\tface index: " << seg.si << endl
+ << "\tp1: " << seg[0] << endl
+ << "\tp2: " << seg[1] << endl
+ << "\tp0 param: " << seg.epgeominfo[ 0 ].dist << endl
+ << "\tp0 uv: " << seg.epgeominfo[ 0 ].u <<", "<< seg.epgeominfo[ 0 ].v << endl
+ //<< "\tp0 edge: " << seg.epgeominfo[ 0 ].edgenr << endl
+ << "\tp1 param: " << seg.epgeominfo[ 1 ].dist << endl
+ << "\tp1 uv: " << seg.epgeominfo[ 1 ].u <<", "<< seg.epgeominfo[ 1 ].v << endl;
+ //<< "\tp1 edge: " << seg.epgeominfo[ 1 ].edgenr << endl;
+#endif
+ if ( isSeam )
+ {
+ if ( helper.GetPeriodicIndex() && 1 ) {
+ seg.epgeominfo[ 0 ].u = otherSeamParam;
+ seg.epgeominfo[ 1 ].u = otherSeamParam;
+ swap (seg.epgeominfo[0].v, seg.epgeominfo[1].v);
+ } else {
+ seg.epgeominfo[ 0 ].v = otherSeamParam;
+ seg.epgeominfo[ 1 ].v = otherSeamParam;
+ swap (seg.epgeominfo[0].u, seg.epgeominfo[1].u);
+ }
+ swap (seg[0], seg[1]);
+ swap (seg.epgeominfo[0].dist, seg.epgeominfo[1].dist);
+ seg.edgenr = ngMesh.GetNSeg() + 1; // segment id
+ ngMesh.AddSegment (seg);
+#ifdef DUMP_SEGMENTS
+ cout << "Segment: " << seg.edgenr << endl
+ << "\t is SEAM (reverse) of the previous. "
+ << " Other " << (helper.GetPeriodicIndex() && 1 ? "U" : "V")
+ << " = " << otherSeamParam << endl;
+#endif
+ }
+ else if ( fOri == TopAbs_INTERNAL )
{
- int aGeomEdgeInd = seg.epgeominfo[j].edgenr;
- if (aGeomEdgeInd > 0 && aGeomEdgeInd <= occgeo.emap.Extent())
- aEdge = TopoDS::Edge(occgeo.emap(aGeomEdgeInd));
+ swap (seg[0], seg[1]);
+ swap( seg.epgeominfo[0], seg.epgeominfo[1] );
+ seg.edgenr = ngMesh.GetNSeg() + 1; // segment id
+ ngMesh.AddSegment (seg);
+#ifdef DUMP_SEGMENTS
+ cout << "Segment: " << seg.edgenr << endl << "\t is REVERSE of the previous" << endl;
+#endif
}
- param = seg.epgeominfo[j].dist;
- param2 += param;
}
- else
- param = param2 * 0.5;
- if (pindMap.Contains(pind))
- continue;
- if (!aEdge.IsNull())
+ } // loop on geomEdge ancestors
+
+ break;
+ } // case TopAbs_EDGE
+
+ case TopAbs_FACE: { // FACE
+ // ----------------------
+ const TopoDS_Face& geomFace = TopoDS::Face( sm->GetSubShape() );
+ helper.SetSubShape( geomFace );
+ bool isInternalFace = ( geomFace.Orientation() == TopAbs_INTERNAL );
+
+ // Find solids the geomFace bounds
+ int solidID1 = 0, solidID2 = 0;
+ StdMeshers_QuadToTriaAdaptor* quadAdaptor =
+ dynamic_cast<StdMeshers_QuadToTriaAdaptor*>( proxyMesh.get() );
+ if ( quadAdaptor )
+ {
+ solidID1 = occgeom.somap.FindIndex( quadAdaptor->GetShape() );
+ }
+ else
+ {
+ PShapeIteratorPtr solidIt = helper.GetAncestors( geomFace, *sm->GetFather(), TopAbs_SOLID);
+ while ( const TopoDS_Shape * solid = solidIt->next() )
{
- _meshDS->SetNodeOnEdge(nodeVec.at(pind), aEdge, param);
- pindMap.Add(pind);
+ int id = occgeom.somap.FindIndex ( *solid );
+ if ( solidID1 && id != solidID1 ) solidID2 = id;
+ else solidID1 = id;
}
}
- SMDS_MeshEdge* edge;
- if (nbp < 3) // second order ?
- edge = _meshDS->AddEdge(nodeVec.at(pinds[0]), nodeVec.at(pinds[1]));
- else
- edge = _meshDS->AddEdge(nodeVec.at(pinds[0]), nodeVec.at(pinds[1]),
- nodeVec.at(pinds[2]));
- if (!edge)
- {
- MESSAGE("Cannot create a mesh edge");
- isOK = false;
- break;
+ // Add ng face descriptors of meshed faces
+ faceNgID++;
+ ngMesh.AddFaceDescriptor (netgen::FaceDescriptor(faceNgID, solidID1, solidID2, 0));
+
+ // if second oreder is required, even already meshed faces must be passed to NETGEN
+ int fID = occgeom.fmap.Add( geomFace );
+ while ( fID < faceNgID ) // geomFace is already in occgeom.fmap, add a copy
+ fID = occgeom.fmap.Add( BRepBuilderAPI_Copy( geomFace, /*copyGeom=*/false ));
+ // Problem with the second order in a quadrangular mesh remains.
+ // 1) All quadrangles geberated by NETGEN are moved to an inexistent face
+ // by FillSMesh() (find AddFaceDescriptor)
+ // 2) Temporary triangles generated by StdMeshers_QuadToTriaAdaptor
+ // are on faces where quadrangles were.
+ // Due to these 2 points, wrong geom faces are used while conversion to qudratic
+ // of the mentioned above quadrangles and triangles
+
+ // Orient the face correctly in solidID1 (issue 0020206)
+ bool reverse = false;
+ if ( solidID1 ) {
+ TopoDS_Shape solid = occgeom.somap( solidID1 );
+ TopAbs_Orientation faceOriInSolid = helper.GetSubShapeOri( solid, geomFace );
+ if ( faceOriInSolid >= 0 )
+ reverse =
+ helper.IsReversedSubMesh( TopoDS::Face( geomFace.Oriented( faceOriInSolid )));
}
- if (!aEdge.IsNull())
- _meshDS->SetMeshElementOnShape(edge, aEdge);
- }
- // create mesh faces along geometric faces
- for (i = 1; i <= nbFac && isOK; ++i )
- {
- const netgen::Element2d& elem = ngMesh->SurfaceElement(i);
- int aGeomFaceInd = elem.GetIndex();
- TopoDS_Face aFace;
- if (aGeomFaceInd > 0 && aGeomFaceInd <= occgeo.fmap.Extent())
- aFace = TopoDS::Face(occgeo.fmap(aGeomFaceInd));
- vector<SMDS_MeshNode*> nodes;
- for (int j=1; j <= elem.GetNP(); ++j)
+ // Add surface elements
+
+ netgen::Element2d tri(3);
+ tri.SetIndex ( faceNgID );
+
+
+#ifdef DUMP_TRIANGLES
+ cout << "SMESH face " << helper.GetMeshDS()->ShapeToIndex( geomFace )
+ << " internal="<<isInternalFace << endl;
+#endif
+ if ( proxyMesh )
+ smDS = proxyMesh->GetSubMesh( geomFace );
+
+ SMDS_ElemIteratorPtr faces = smDS->GetElements();
+ while ( faces->more() )
{
- int pind = elem.PNum(j);
- SMDS_MeshNode* node = nodeVec.at(pind);
- nodes.push_back(node);
- if (pindMap.Contains(pind))
- continue;
- if (!aFace.IsNull())
+ const SMDS_MeshElement* f = faces->next();
+ if ( f->NbNodes() % 3 != 0 ) // not triangle
{
- const netgen::PointGeomInfo& pgi = elem.GeomInfoPi(j);
- _meshDS->SetNodeOnFace(node, aFace, pgi.u, pgi.v);
- pindMap.Add(pind);
+ PShapeIteratorPtr solidIt=helper.GetAncestors(geomFace,*sm->GetFather(),TopAbs_SOLID);
+ if ( const TopoDS_Shape * solid = solidIt->next() )
+ sm = _mesh->GetSubMesh( *solid );
+ SMESH_ComputeErrorPtr& smError = sm->GetComputeError();
+ smError.reset( new SMESH_ComputeError(COMPERR_BAD_INPUT_MESH,"Not triangle submesh"));
+ smError->myBadElements.push_back( f );
+ return false;
+ }
+
+ for ( int i = 0; i < 3; ++i )
+ {
+ const SMDS_MeshNode* node = f->GetNode( i ), * inFaceNode=0;
+
+ // get node UV on face
+ int shapeID = node->getshapeId();
+ if ( helper.IsSeamShape( shapeID ))
+ if ( helper.IsSeamShape( f->GetNodeWrap( i+1 )->getshapeId() ))
+ inFaceNode = f->GetNodeWrap( i-1 );
+ else
+ inFaceNode = f->GetNodeWrap( i+1 );
+ gp_XY uv = helper.GetNodeUV( geomFace, node, inFaceNode );
+
+ int ind = reverse ? 3-i : i+1;
+ tri.GeomInfoPi(ind).u = uv.X();
+ tri.GeomInfoPi(ind).v = uv.Y();
+ tri.PNum (ind) = ngNodeId( node, ngMesh, nodeNgIdMap );
+ }
+
+ ngMesh.AddSurfaceElement (tri);
+#ifdef DUMP_TRIANGLES
+ cout << tri << endl;
+#endif
+
+ if ( isInternalFace )
+ {
+ swap( tri[1], tri[2] );
+ ngMesh.AddSurfaceElement (tri);
+#ifdef DUMP_TRIANGLES
+ cout << tri << endl;
+#endif
}
}
- SMDS_MeshFace* face = NULL;
- switch (elem.GetType())
+ break;
+ } // case TopAbs_FACE
+
+ case TopAbs_VERTEX: { // VERTEX
+ // --------------------------
+ // issue 0021405. Add node only if a VERTEX is shared by a not meshed EDGE,
+ // else netgen removes a free node and nodeVector becomes invalid
+ PShapeIteratorPtr ansIt = helper.GetAncestors( sm->GetSubShape(),
+ *sm->GetFather(),
+ TopAbs_EDGE );
+ bool toAdd = false;
+ while ( const TopoDS_Shape* e = ansIt->next() )
{
- case netgen::TRIG:
- face = _meshDS->AddFace(nodes[0],nodes[1],nodes[2]);
- break;
- case netgen::QUAD:
- face = _meshDS->AddFace(nodes[0],nodes[1],nodes[2],nodes[3]);
- break;
- case netgen::TRIG6:
- face = _meshDS->AddFace(nodes[0],nodes[1],nodes[2],nodes[5],nodes[3],nodes[4]);
- break;
- case netgen::QUAD8:
- face = _meshDS->AddFace(nodes[0],nodes[1],nodes[2],nodes[3],
- nodes[4],nodes[7],nodes[5],nodes[6]);
- break;
- default:
- MESSAGE("NETGEN created a face of unexpected type, ignoring");
- continue;
+ SMESH_subMesh* eSub = helper.GetMesh()->GetSubMesh( *e );
+ if (( toAdd = eSub->IsEmpty() )) break;
}
- if (!face)
+ if ( toAdd )
{
- MESSAGE("Cannot create a mesh face");
- isOK = false;
- break;
+ SMDS_NodeIteratorPtr nodeIt = smDS->GetNodes();
+ if ( nodeIt->more() )
+ ngNodeId( nodeIt->next(), ngMesh, nodeNgIdMap );
}
- if (!aFace.IsNull())
- _meshDS->SetMeshElementOnShape(face, aFace);
+ break;
}
+ default:;
+ } // switch
+ } // loop on submeshes
- // create tetrahedra
- for (i = 1; i <= nbVol && isOK; ++i)
- {
- const netgen::Element& elem = ngMesh->VolumeElement(i);
- int aSolidInd = elem.GetIndex();
- TopoDS_Solid aSolid;
- if (aSolidInd > 0 && aSolidInd <= occgeo.somap.Extent())
- aSolid = TopoDS::Solid(occgeo.somap(aSolidInd));
- vector<SMDS_MeshNode*> nodes;
- for (int j=1; j <= elem.GetNP(); ++j)
+ // fill nodeVec
+ nodeVec.resize( ngMesh.GetNP() + 1 );
+ TNode2IdMap::iterator node_NgId, nodeNgIdEnd = nodeNgIdMap.end();
+ for ( node_NgId = nodeNgIdMap.begin(); node_NgId != nodeNgIdEnd; ++node_NgId)
+ nodeVec[ node_NgId->second ] = node_NgId->first;
+
+ return true;
+}
+
+//================================================================================
+/*!
+ * \brief Duplicate mesh faces on internal geom faces
+ */
+//================================================================================
+
+void NETGENPlugin_Mesher::FixIntFaces(const netgen::OCCGeometry& occgeom,
+ netgen::Mesh& ngMesh,
+ NETGENPlugin_Internals& internalShapes)
+{
+ SMESHDS_Mesh* meshDS = internalShapes.getMesh().GetMeshDS();
+
+ // find ng indices of internal faces
+ set<int> ngFaceIds;
+ for ( int ngFaceID = 1; ngFaceID <= occgeom.fmap.Extent(); ++ngFaceID )
+ {
+ int smeshID = meshDS->ShapeToIndex( occgeom.fmap( ngFaceID ));
+ if ( internalShapes.isInternalShape( smeshID ))
+ ngFaceIds.insert( ngFaceID );
+ }
+ if ( !ngFaceIds.empty() )
+ {
+ // duplicate faces
+ int i, nbFaces = ngMesh.GetNSE();
+ for (int i = 1; i <= nbFaces; ++i)
+ {
+ netgen::Element2d elem = ngMesh.SurfaceElement(i);
+ if ( ngFaceIds.count( elem.GetIndex() ))
{
- int pind = elem.PNum(j);
- SMDS_MeshNode* node = nodeVec.at(pind);
- nodes.push_back(node);
- if (pindMap.Contains(pind))
- continue;
- if (!aSolid.IsNull())
+ swap( elem[1], elem[2] );
+ ngMesh.AddSurfaceElement (elem);
+ }
+ }
+ }
+}
+
+namespace
+{
+ //================================================================================
+ // define gp_XY_Subtracted pointer to function calling gp_XY::Subtracted(gp_XY)
+ gp_XY_FunPtr(Subtracted);
+ //gp_XY_FunPtr(Added);
+
+ //================================================================================
+ /*!
+ * \brief Evaluate distance between two 2d points along the surface
+ */
+ //================================================================================
+
+ double evalDist( const gp_XY& uv1,
+ const gp_XY& uv2,
+ const Handle(Geom_Surface)& surf,
+ const int stopHandler=-1)
+ {
+ if ( stopHandler > 0 ) // continue recursion
+ {
+ gp_XY mid = SMESH_MesherHelper::GetMiddleUV( surf, uv1, uv2 );
+ return evalDist( uv1,mid, surf, stopHandler-1 ) + evalDist( mid,uv2, surf, stopHandler-1 );
+ }
+ double dist3D = surf->Value( uv1.X(), uv1.Y() ).Distance( surf->Value( uv2.X(), uv2.Y() ));
+ if ( stopHandler == 0 ) // stop recursion
+ return dist3D;
+
+ // start recursion if necessary
+ double dist2D = SMESH_MesherHelper::applyIn2D(surf, uv1, uv2, gp_XY_Subtracted, 0).Modulus();
+ if ( fabs( dist3D - dist2D ) < dist2D * 1e-10 )
+ return dist3D; // equal parametrization of a planar surface
+
+ return evalDist( uv1, uv2, surf, 3 ); // start recursion
+ }
+
+ //================================================================================
+ /*!
+ * \brief Data of vertex internal in geom face
+ */
+ //================================================================================
+
+ struct TIntVData
+ {
+ gp_XY uv; //!< UV in face parametric space
+ int ngId; //!< ng id of corrsponding node
+ gp_XY uvClose; //!< UV of closest boundary node
+ int ngIdClose; //!< ng id of closest boundary node
+ };
+
+ //================================================================================
+ /*!
+ * \brief Data of vertex internal in solid
+ */
+ //================================================================================
+
+ struct TIntVSoData
+ {
+ int ngId; //!< ng id of corresponding node
+ int ngIdClose; //!< ng id of closest 2d mesh element
+ int ngIdCloseN; //!< ng id of closest node of the closest 2d mesh element
+ };
+
+ inline double dist2(const netgen::MeshPoint& p1, const netgen::MeshPoint& p2)
+ {
+ return gp_Pnt( NGPOINT_COORDS(p1)).SquareDistance( gp_Pnt( NGPOINT_COORDS(p2)));
+ }
+}
+
+//================================================================================
+/*!
+ * \brief Make netgen take internal vertices in faces into account by adding
+ * segments including internal vertices
+ *
+ * This function works in supposition that 1D mesh is already computed in ngMesh
+ */
+//================================================================================
+
+void NETGENPlugin_Mesher::AddIntVerticesInFaces(const netgen::OCCGeometry& occgeom,
+ netgen::Mesh& ngMesh,
+ vector<const SMDS_MeshNode*>& nodeVec,
+ NETGENPlugin_Internals& internalShapes)
+{
+ if ( nodeVec.size() < ngMesh.GetNP() )
+ nodeVec.resize( ngMesh.GetNP(), 0 );
+
+ SMESHDS_Mesh* meshDS = internalShapes.getMesh().GetMeshDS();
+ SMESH_MesherHelper helper( internalShapes.getMesh() );
+
+ const map<int,list<int> >& face2Vert = internalShapes.getFacesWithVertices();
+ map<int,list<int> >::const_iterator f2v = face2Vert.begin();
+ for ( ; f2v != face2Vert.end(); ++f2v )
+ {
+ const TopoDS_Face& face = TopoDS::Face( meshDS->IndexToShape( f2v->first ));
+ if ( face.IsNull() ) continue;
+ int faceNgID = occgeom.fmap.FindIndex (face);
+ if ( faceNgID < 0 ) continue;
+
+ TopLoc_Location loc;
+ Handle(Geom_Surface) surf = BRep_Tool::Surface(face,loc);
+
+ helper.SetSubShape( face );
+ helper.SetElementsOnShape( true );
+
+ // Get data of internal vertices and add them to ngMesh
+
+ multimap< double, TIntVData > dist2VData; // sort vertices by distance from boundary nodes
+
+ int i, nbSegInit = ngMesh.GetNSeg();
+
+ // boundary characteristics
+ double totSegLen2D = 0;
+ int totNbSeg = 0;
+
+ const list<int>& iVertices = f2v->second;
+ list<int>::const_iterator iv = iVertices.begin();
+ for ( int nbV = 0; iv != iVertices.end(); ++iv, nbV++ )
+ {
+ TIntVData vData;
+ // get node on vertex
+ const TopoDS_Vertex V = TopoDS::Vertex( meshDS->IndexToShape( *iv ));
+ const SMDS_MeshNode * nV = SMESH_Algo::VertexNode( V, meshDS );
+ if ( !nV )
+ {
+ SMESH_subMesh* sm = helper.GetMesh()->GetSubMesh( V );
+ sm->ComputeStateEngine( SMESH_subMesh::COMPUTE );
+ nV = SMESH_Algo::VertexNode( V, meshDS );
+ if ( !nV ) continue;
+ }
+ // add ng node
+ netgen::MeshPoint mp( netgen::Point<3> (nV->X(), nV->Y(), nV->Z()) );
+ ngMesh.AddPoint ( mp, 1, netgen::EDGEPOINT );
+ vData.ngId = ngMesh.GetNP();
+ nodeVec.push_back( nV );
+
+ // get node UV
+ bool uvOK = false;
+ vData.uv = helper.GetNodeUV( face, nV, 0, &uvOK );
+ if ( !uvOK ) helper.CheckNodeUV( face, nV, vData.uv, BRep_Tool::Tolerance(V),/*force=*/1);
+
+ // loop on all segments of the face to find the node closest to vertex and to count
+ // average segment 2d length
+ double closeDist2 = numeric_limits<double>::max(), dist2;
+ int ngIdLast = 0;
+ for (i = 1; i <= ngMesh.GetNSeg(); ++i)
+ {
+ netgen::Segment & seg = ngMesh.LineSegment(i);
+ if ( seg.si != faceNgID ) continue;
+ gp_XY uv[2];
+ for ( int iEnd = 0; iEnd < 2; ++iEnd)
+ {
+ uv[iEnd].SetCoord( seg.epgeominfo[iEnd].u, seg.epgeominfo[iEnd].v );
+ if ( ngIdLast == seg[ iEnd ] ) continue;
+ dist2 = helper.applyIn2D(surf, uv[iEnd], vData.uv, gp_XY_Subtracted,0).SquareModulus();
+ if ( dist2 < closeDist2 )
+ vData.ngIdClose = seg[ iEnd ], vData.uvClose = uv[iEnd], closeDist2 = dist2;
+ ngIdLast = seg[ iEnd ];
+ }
+ if ( !nbV )
+ {
+ totSegLen2D += helper.applyIn2D(surf, uv[0], uv[1], gp_XY_Subtracted, false).Modulus();
+ totNbSeg++;
+ }
+ }
+ dist2VData.insert( make_pair( closeDist2, vData ));
+ }
+
+ if ( totNbSeg == 0 ) break;
+ double avgSegLen2d = totSegLen2D / totNbSeg;
+
+ // Loop on vertices to add segments
+
+ multimap< double, TIntVData >::iterator dist_vData = dist2VData.begin();
+ for ( ; dist_vData != dist2VData.end(); ++dist_vData )
+ {
+ double closeDist2 = dist_vData->first, dist2;
+ TIntVData & vData = dist_vData->second;
+
+ // try to find more close node among segments added for internal vertices
+ for (i = nbSegInit+1; i <= ngMesh.GetNSeg(); ++i)
+ {
+ netgen::Segment & seg = ngMesh.LineSegment(i);
+ if ( seg.si != faceNgID ) continue;
+ gp_XY uv[2];
+ for ( int iEnd = 0; iEnd < 2; ++iEnd)
{
- // point in solid
- _meshDS->SetNodeInVolume(node, aSolid);
- pindMap.Add(pind);
+ uv[iEnd].SetCoord( seg.epgeominfo[iEnd].u, seg.epgeominfo[iEnd].v );
+ dist2 = helper.applyIn2D(surf, uv[iEnd], vData.uv, gp_XY_Subtracted,0).SquareModulus();
+ if ( dist2 < closeDist2 )
+ vData.ngIdClose = seg[ iEnd ], vData.uvClose = uv[iEnd], closeDist2 = dist2;
}
}
- SMDS_MeshVolume* vol = NULL;
- switch (elem.GetType())
+ // decide whether to use the closest node as the second end of segment or to
+ // create a new point
+ int segEnd1 = vData.ngId;
+ int segEnd2 = vData.ngIdClose; // to use closest node
+ gp_XY uvV = vData.uv, uvP = vData.uvClose;
+ double segLenHint = ngMesh.GetH( ngMesh.Point( vData.ngId ));
+ double nodeDist2D = sqrt( closeDist2 );
+ double nodeDist3D = evalDist( vData.uv, vData.uvClose, surf );
+ bool avgLenOK = ( avgSegLen2d < 0.75 * nodeDist2D );
+ bool hintLenOK = ( segLenHint < 0.75 * nodeDist3D );
+ //cout << "uvV " << uvV.X() <<","<<uvV.Y() << " ";
+ if ( hintLenOK || avgLenOK )
{
- case netgen::TET:
- vol = _meshDS->AddVolume(nodes[0],nodes[1],nodes[2],nodes[3]);
- break;
- case netgen::TET10:
- vol = _meshDS->AddVolume(nodes[0],nodes[1],nodes[2],nodes[3],
- nodes[4],nodes[7],nodes[5],nodes[6],nodes[8],nodes[9]);
- break;
- default:
- MESSAGE("NETGEN created a volume of unexpected type, ignoring");
+ // create a point between the closest node and V
+
+ // how far from V
+ double r = min( 0.5, ( hintLenOK ? segLenHint/nodeDist3D : avgSegLen2d/nodeDist2D ));
+ // direction from V to closet node in 2D
+ gp_Dir2d v2n( helper.applyIn2D(surf, uvP, uvV, gp_XY_Subtracted, false ));
+ // new point
+ uvP = vData.uv + r * nodeDist2D * v2n.XY();
+ gp_Pnt P = surf->Value( uvP.X(), uvP.Y() ).Transformed( loc );
+
+ netgen::MeshPoint mp( netgen::Point<3> (P.X(), P.Y(), P.Z()));
+ ngMesh.AddPoint ( mp, 1, netgen::EDGEPOINT );
+ segEnd2 = ngMesh.GetNP();
+ //cout << "Middle " << r << " uv " << uvP.X() << "," << uvP.Y() << "( " << ngMesh.Point(segEnd2).X()<<","<<ngMesh.Point(segEnd2).Y()<<","<<ngMesh.Point(segEnd2).Z()<<" )"<< endl;
+ SMDS_MeshNode * nP = helper.AddNode(P.X(), P.Y(), P.Z());
+ nodeVec.push_back( nP );
+ }
+ //else cout << "at Node " << " uv " << uvP.X() << "," << uvP.Y() << endl;
+
+ // Add the segment
+ netgen::Segment seg;
+
+ if ( segEnd1 > segEnd2 ) swap( segEnd1, segEnd2 ), swap( uvV, uvP );
+ seg[0] = segEnd1; // ng node id
+ seg[1] = segEnd2; // ng node id
+ seg.edgenr = ngMesh.GetNSeg() + 1;// segment id
+ seg.si = faceNgID;
+
+ seg.epgeominfo[ 0 ].dist = 0; // param on curve
+ seg.epgeominfo[ 0 ].u = uvV.X();
+ seg.epgeominfo[ 0 ].v = uvV.Y();
+ seg.epgeominfo[ 1 ].dist = 1; // param on curve
+ seg.epgeominfo[ 1 ].u = uvP.X();
+ seg.epgeominfo[ 1 ].v = uvP.Y();
+
+// seg.epgeominfo[ 0 ].edgenr = 10; // = geom.emap.FindIndex(edge);
+// seg.epgeominfo[ 1 ].edgenr = 10; // = geom.emap.FindIndex(edge);
+
+ ngMesh.AddSegment (seg);
+
+ // add reverse segment
+ swap (seg[0], seg[1]);
+ swap( seg.epgeominfo[0], seg.epgeominfo[1] );
+ seg.edgenr = ngMesh.GetNSeg() + 1; // segment id
+ ngMesh.AddSegment (seg);
+ }
+
+ }
+}
+
+//================================================================================
+/*!
+ * \brief Make netgen take internal vertices in solids into account by adding
+ * faces including internal vertices
+ *
+ * This function works in supposition that 2D mesh is already computed in ngMesh
+ */
+//================================================================================
+
+void NETGENPlugin_Mesher::AddIntVerticesInSolids(const netgen::OCCGeometry& occgeom,
+ netgen::Mesh& ngMesh,
+ vector<const SMDS_MeshNode*>& nodeVec,
+ NETGENPlugin_Internals& internalShapes)
+{
+#ifdef DUMP_TRIANGLES_SCRIPT
+ // create a python script making a mesh containing triangles added for internal vertices
+ ofstream py(DUMP_TRIANGLES_SCRIPT);
+ py << "import SMESH"<< endl
+ << "from salome.smesh import smeshBuilder"<<endl
+ << "smesh = smeshBuilder.New(salome.myStudy)"
+ << "m = smesh.Mesh(name='triangles')" << endl;
+#endif
+ if ( nodeVec.size() < ngMesh.GetNP() )
+ nodeVec.resize( ngMesh.GetNP(), 0 );
+
+ SMESHDS_Mesh* meshDS = internalShapes.getMesh().GetMeshDS();
+ SMESH_MesherHelper helper( internalShapes.getMesh() );
+
+ const map<int,list<int> >& so2Vert = internalShapes.getSolidsWithVertices();
+ map<int,list<int> >::const_iterator s2v = so2Vert.begin();
+ for ( ; s2v != so2Vert.end(); ++s2v )
+ {
+ const TopoDS_Shape& solid = meshDS->IndexToShape( s2v->first );
+ if ( solid.IsNull() ) continue;
+ int solidNgID = occgeom.somap.FindIndex (solid);
+ if ( solidNgID < 0 && !occgeom.somap.IsEmpty() ) continue;
+
+ helper.SetSubShape( solid );
+ helper.SetElementsOnShape( true );
+
+ // find ng indices of faces within the solid
+ set<int> ngFaceIds;
+ for (TopExp_Explorer fExp(solid, TopAbs_FACE); fExp.More(); fExp.Next() )
+ ngFaceIds.insert( occgeom.fmap.FindIndex( fExp.Current() ));
+ if ( ngFaceIds.size() == 1 && *ngFaceIds.begin() == 0 )
+ ngFaceIds.insert( 1 );
+
+ // Get data of internal vertices and add them to ngMesh
+
+ multimap< double, TIntVSoData > dist2VData; // sort vertices by distance from ng faces
+
+ int i, nbFaceInit = ngMesh.GetNSE();
+
+ // boundary characteristics
+ double totSegLen = 0;
+ int totNbSeg = 0;
+
+ const list<int>& iVertices = s2v->second;
+ list<int>::const_iterator iv = iVertices.begin();
+ for ( int nbV = 0; iv != iVertices.end(); ++iv, nbV++ )
+ {
+ TIntVSoData vData;
+ const TopoDS_Vertex V = TopoDS::Vertex( meshDS->IndexToShape( *iv ));
+
+ // get node on vertex
+ const SMDS_MeshNode * nV = SMESH_Algo::VertexNode( V, meshDS );
+ if ( !nV )
+ {
+ SMESH_subMesh* sm = helper.GetMesh()->GetSubMesh( V );
+ sm->ComputeStateEngine( SMESH_subMesh::COMPUTE );
+ nV = SMESH_Algo::VertexNode( V, meshDS );
+ if ( !nV ) continue;
+ }
+ // add ng node
+ netgen::MeshPoint mpV( netgen::Point<3> (nV->X(), nV->Y(), nV->Z()) );
+ ngMesh.AddPoint ( mpV, 1, netgen::FIXEDPOINT );
+ vData.ngId = ngMesh.GetNP();
+ nodeVec.push_back( nV );
+
+ // loop on all 2d elements to find the one closest to vertex and to count
+ // average segment length
+ double closeDist2 = numeric_limits<double>::max(), avgDist2;
+ for (i = 1; i <= ngMesh.GetNSE(); ++i)
+ {
+ const netgen::Element2d& elem = ngMesh.SurfaceElement(i);
+ if ( !ngFaceIds.count( elem.GetIndex() )) continue;
+ avgDist2 = 0;
+ multimap< double, int> dist2nID; // sort nodes of element by distance from V
+ for ( int j = 0; j < elem.GetNP(); ++j)
+ {
+ netgen::MeshPoint mp = ngMesh.Point( elem[j] );
+ double d2 = dist2( mpV, mp );
+ dist2nID.insert( make_pair( d2, elem[j] ));
+ avgDist2 += d2 / elem.GetNP();
+ if ( !nbV )
+ totNbSeg++, totSegLen+= sqrt( dist2( mp, ngMesh.Point( elem[(j+1)%elem.GetNP()])));
+ }
+ double dist = dist2nID.begin()->first; //avgDist2;
+ if ( dist < closeDist2 )
+ vData.ngIdClose= i, vData.ngIdCloseN= dist2nID.begin()->second, closeDist2= dist;
+ }
+ dist2VData.insert( make_pair( closeDist2, vData ));
+ }
+
+ if ( totNbSeg == 0 ) break;
+ double avgSegLen = totSegLen / totNbSeg;
+
+ // Loop on vertices to add triangles
+
+ multimap< double, TIntVSoData >::iterator dist_vData = dist2VData.begin();
+ for ( ; dist_vData != dist2VData.end(); ++dist_vData )
+ {
+ double closeDist2 = dist_vData->first;
+ TIntVSoData & vData = dist_vData->second;
+
+ const netgen::MeshPoint& mpV = ngMesh.Point( vData.ngId );
+
+ // try to find more close face among ones added for internal vertices
+ for (i = nbFaceInit+1; i <= ngMesh.GetNSE(); ++i)
+ {
+ double avgDist2 = 0;
+ multimap< double, int> dist2nID;
+ const netgen::Element2d& elem = ngMesh.SurfaceElement(i);
+ for ( int j = 0; j < elem.GetNP(); ++j)
+ {
+ double d = dist2( mpV, ngMesh.Point( elem[j] ));
+ dist2nID.insert( make_pair( d, elem[j] ));
+ avgDist2 += d / elem.GetNP();
+ if ( avgDist2 < closeDist2 )
+ vData.ngIdClose= i, vData.ngIdCloseN= dist2nID.begin()->second, closeDist2= avgDist2;
+ }
+ }
+ // sort nodes of the closest face by angle with vector from V to the closest node
+ const double tol = numeric_limits<double>::min();
+ map< double, int > angle2ID;
+ const netgen::Element2d& closeFace = ngMesh.SurfaceElement( vData.ngIdClose );
+ netgen::MeshPoint mp[2];
+ mp[0] = ngMesh.Point( vData.ngIdCloseN );
+ gp_XYZ p1( NGPOINT_COORDS( mp[0] ));
+ gp_XYZ pV( NGPOINT_COORDS( mpV ));
+ gp_Vec v2p1( pV, p1 );
+ double distN1 = v2p1.Magnitude();
+ if ( distN1 <= tol ) continue;
+ v2p1 /= distN1;
+ for ( int j = 0; j < closeFace.GetNP(); ++j)
+ {
+ mp[1] = ngMesh.Point( closeFace[j] );
+ gp_Vec v2p( pV, gp_Pnt( NGPOINT_COORDS( mp[1] )) );
+ angle2ID.insert( make_pair( v2p1.Angle( v2p ), closeFace[j]));
+ }
+ // get node with angle of 60 degrees or greater
+ map< double, int >::iterator angle_id = angle2ID.lower_bound( 60. * M_PI / 180. );
+ if ( angle_id == angle2ID.end() ) angle_id = --angle2ID.end();
+ const double minAngle = 30. * M_PI / 180.;
+ const double angle = angle_id->first;
+ bool angleOK = ( angle > minAngle );
+
+ // find points to create a triangle
+ netgen::Element2d tri(3);
+ tri.SetIndex ( 1 );
+ tri[0] = vData.ngId;
+ tri[1] = vData.ngIdCloseN; // to use the closest nodes
+ tri[2] = angle_id->second; // to use the node with best angle
+
+ // decide whether to use the closest node and the node with best angle or to create new ones
+ for ( int isBestAngleN = 0; isBestAngleN < 2; ++isBestAngleN )
+ {
+ bool createNew = !angleOK, distOK = true;
+ double distFromV;
+ int triInd = isBestAngleN ? 2 : 1;
+ mp[isBestAngleN] = ngMesh.Point( tri[triInd] );
+ if ( isBestAngleN )
+ {
+ if ( angleOK )
+ {
+ double distN2 = sqrt( dist2( mpV, mp[isBestAngleN]));
+ createNew = ( fabs( distN2 - distN1 ) > 0.25 * distN1 );
+ }
+ else if ( angle < tol )
+ {
+ v2p1.SetX( v2p1.X() + 1e-3 );
+ }
+ distFromV = distN1;
+ }
+ else
+ {
+ double segLenHint = ngMesh.GetH( ngMesh.Point( vData.ngId ));
+ bool avgLenOK = ( avgSegLen < 0.75 * distN1 );
+ bool hintLenOK = ( segLenHint < 0.75 * distN1 );
+ createNew = (createNew || avgLenOK || hintLenOK );
+ // we create a new node not closer than 0.5 to the closest face
+ // in order not to clash with other close face
+ double r = min( 0.5, ( hintLenOK ? segLenHint : avgSegLen ) / distN1 );
+ distFromV = r * distN1;
+ }
+ if ( createNew )
+ {
+ // create a new point, between the node and the vertex if angleOK
+ gp_XYZ p( NGPOINT_COORDS( mp[isBestAngleN] ));
+ gp_Vec v2p( pV, p ); v2p.Normalize();
+ if ( isBestAngleN && !angleOK )
+ p = p1 + gp_Dir( v2p.XYZ() - v2p1.XYZ()).XYZ() * distN1 * 0.95;
+ else
+ p = pV + v2p.XYZ() * distFromV;
+
+ if ( !isBestAngleN ) p1 = p, distN1 = distFromV;
+
+ mp[isBestAngleN].SetPoint( netgen::Point<3> (p.X(), p.Y(), p.Z()));
+ ngMesh.AddPoint ( mp[isBestAngleN], 1, netgen::SURFACEPOINT );
+ tri[triInd] = ngMesh.GetNP();
+ nodeVec.push_back( helper.AddNode( p.X(), p.Y(), p.Z()) );
+ }
+ }
+ ngMesh.AddSurfaceElement (tri);
+ swap( tri[1], tri[2] );
+ ngMesh.AddSurfaceElement (tri);
+
+#ifdef DUMP_TRIANGLES_SCRIPT
+ py << "n1 = m.AddNode( "<< mpV.X()<<", "<< mpV.Y()<<", "<< mpV.Z()<<") "<< endl
+ << "n2 = m.AddNode( "<< mp[0].X()<<", "<< mp[0].Y()<<", "<< mp[0].Z()<<") "<< endl
+ << "n3 = m.AddNode( "<< mp[1].X()<<", "<< mp[1].Y()<<", "<< mp[1].Z()<<" )" << endl
+ << "m.AddFace([n1,n2,n3])" << endl;
+#endif
+ } // loop on internal vertices of a solid
+
+ } // loop on solids with internal vertices
+}
+
+//================================================================================
+/*!
+ * \brief Fill netgen mesh with segments of a FACE
+ * \param ngMesh - netgen mesh
+ * \param geom - container of OCCT geometry to mesh
+ * \param wires - data of nodes on FACE boundary
+ * \param helper - mesher helper holding the FACE
+ * \param nodeVec - vector of nodes in which node index == netgen ID
+ * \retval SMESH_ComputeErrorPtr - error description
+ */
+//================================================================================
+
+SMESH_ComputeErrorPtr
+NETGENPlugin_Mesher::AddSegmentsToMesh(netgen::Mesh& ngMesh,
+ netgen::OCCGeometry& geom,
+ const TSideVector& wires,
+ SMESH_MesherHelper& helper,
+ vector< const SMDS_MeshNode* > & nodeVec)
+{
+ // ----------------------------
+ // Check wires and count nodes
+ // ----------------------------
+ int nbNodes = 0;
+ for ( int iW = 0; iW < wires.size(); ++iW )
+ {
+ StdMeshers_FaceSidePtr wire = wires[ iW ];
+ if ( wire->MissVertexNode() )
+ {
+ // Commented for issue 0020960. It worked for the case, let's wait for case where it doesn't.
+ // It seems that there is no reason for this limitation
+// return TError
+// (new SMESH_ComputeError(COMPERR_BAD_INPUT_MESH, "Missing nodes on vertices"));
+ }
+ const vector<UVPtStruct>& uvPtVec = wire->GetUVPtStruct();
+ if ( uvPtVec.size() != wire->NbPoints() )
+ return SMESH_ComputeError::New(COMPERR_BAD_INPUT_MESH,
+ SMESH_Comment("Unexpected nb of points on wire ") << iW
+ << ": " << uvPtVec.size()<<" != "<<wire->NbPoints());
+ nbNodes += wire->NbPoints();
+ }
+ nodeVec.reserve( nodeVec.size() + nbNodes + 1 );
+ if ( nodeVec.empty() )
+ nodeVec.push_back( 0 );
+
+ // -----------------
+ // Fill netgen mesh
+ // -----------------
+
+ const bool wasNgMeshEmpty = ( ngMesh.GetNP() < 1 ); /* true => this method is called by
+ NETGENPlugin_NETGEN_2D_ONLY */
+
+ // map for nodes on vertices since they can be shared between wires
+ // ( issue 0020676, face_int_box.brep) and nodes built by NETGEN
+ map<const SMDS_MeshNode*, int > node2ngID;
+ if ( !wasNgMeshEmpty ) // fill node2ngID with nodes built by NETGEN
+ {
+ set< int > subIDs; // ids of sub-shapes of the FACE
+ for ( int iW = 0; iW < wires.size(); ++iW )
+ {
+ StdMeshers_FaceSidePtr wire = wires[ iW ];
+ for ( int iE = 0, nbE = wire->NbEdges(); iE < nbE; ++iE )
+ {
+ subIDs.insert( wire->EdgeID( iE ));
+ subIDs.insert( helper.GetMeshDS()->ShapeToIndex( wire->FirstVertex( iE )));
+ }
+ }
+ for ( size_t ngID = 1; ngID < nodeVec.size(); ++ngID )
+ if ( subIDs.count( nodeVec[ngID]->getshapeId() ))
+ node2ngID.insert( make_pair( nodeVec[ngID], ngID ));
+ }
+
+ const int solidID = 0, faceID = geom.fmap.FindIndex( helper.GetSubShape() );
+ if ( ngMesh.GetNFD() < 1 )
+ ngMesh.AddFaceDescriptor (netgen::FaceDescriptor(faceID, solidID, solidID, 0));
+
+ for ( int iW = 0; iW < wires.size(); ++iW )
+ {
+ StdMeshers_FaceSidePtr wire = wires[ iW ];
+ const vector<UVPtStruct>& uvPtVec = wire->GetUVPtStruct();
+ const int nbSegments = wire->NbPoints() - 1;
+
+ // assure the 1st node to be in node2ngID, which is needed to correctly
+ // "close chain of segments" (see below) in case if the 1st node is not
+ // onVertex because it is on a Viscous layer
+ node2ngID.insert( make_pair( uvPtVec[ 0 ].node, ngMesh.GetNP() + 1 ));
+
+ // compute length of every segment
+ vector<double> segLen( nbSegments );
+ for ( int i = 0; i < nbSegments; ++i )
+ segLen[i] = SMESH_TNodeXYZ( uvPtVec[ i ].node ).Distance( uvPtVec[ i+1 ].node );
+
+ int edgeID = 1, posID = -2;
+ bool isInternalWire = false;
+ double vertexNormPar = 0;
+ const int prevNbNGSeg = ngMesh.GetNSeg();
+ for ( int i = 0; i < nbSegments; ++i ) // loop on segments
+ {
+ // Add the first point of a segment
+
+ const SMDS_MeshNode * n = uvPtVec[ i ].node;
+ const int posShapeID = n->getshapeId();
+ bool onVertex = ( n->GetPosition()->GetTypeOfPosition() == SMDS_TOP_VERTEX );
+ bool onEdge = ( n->GetPosition()->GetTypeOfPosition() == SMDS_TOP_EDGE );
+
+ // skip nodes on degenerated edges
+ if ( helper.IsDegenShape( posShapeID ) &&
+ helper.IsDegenShape( uvPtVec[ i+1 ].node->getshapeId() ))
continue;
+
+ int ngID1 = ngMesh.GetNP() + 1, ngID2 = ngID1+1;
+ if ( onVertex || ( !wasNgMeshEmpty && onEdge ))
+ ngID1 = node2ngID.insert( make_pair( n, ngID1 )).first->second;
+ if ( ngID1 > ngMesh.GetNP() )
+ {
+ netgen::MeshPoint mp( netgen::Point<3> (n->X(), n->Y(), n->Z()) );
+ ngMesh.AddPoint ( mp, 1, netgen::EDGEPOINT );
+ nodeVec.push_back( n );
+ }
+ else // n is in ngMesh already, and ngID2 in prev segment is wrong
+ {
+ ngID2 = ngMesh.GetNP() + 1;
+ if ( i > 0 ) // prev segment belongs to same wire
+ {
+ netgen::Segment& prevSeg = ngMesh.LineSegment( ngMesh.GetNSeg() );
+ prevSeg[1] = ngID1;
+ }
+ }
+
+ // Add the segment
+
+ netgen::Segment seg;
+
+ seg[0] = ngID1; // ng node id
+ seg[1] = ngID2; // ng node id
+ seg.edgenr = ngMesh.GetNSeg() + 1; // ng segment id
+ seg.si = faceID; // = geom.fmap.FindIndex (face);
+
+ for ( int iEnd = 0; iEnd < 2; ++iEnd)
+ {
+ const UVPtStruct& pnt = uvPtVec[ i + iEnd ];
+
+ seg.epgeominfo[ iEnd ].dist = pnt.param; // param on curve
+ seg.epgeominfo[ iEnd ].u = pnt.u;
+ seg.epgeominfo[ iEnd ].v = pnt.v;
+
+ // find out edge id and node parameter on edge
+ onVertex = ( pnt.normParam + 1e-10 > vertexNormPar );
+ if ( onVertex || posShapeID != posID )
+ {
+ // get edge id
+ double normParam = pnt.normParam;
+ if ( onVertex )
+ normParam = 0.5 * ( uvPtVec[ i ].normParam + uvPtVec[ i+1 ].normParam );
+ int edgeIndexInWire = wire->EdgeIndex( normParam );
+ vertexNormPar = wire->LastParameter( edgeIndexInWire );
+ const TopoDS_Edge& edge = wire->Edge( edgeIndexInWire );
+ edgeID = geom.emap.FindIndex( edge );
+ posID = posShapeID;
+ isInternalWire = ( edge.Orientation() == TopAbs_INTERNAL );
+ // if ( onVertex ) // param on curve is different on each of two edges
+ // seg.epgeominfo[ iEnd ].dist = helper.GetNodeU( edge, pnt.node );
+ }
+ seg.epgeominfo[ iEnd ].edgenr = edgeID; // = geom.emap.FindIndex(edge);
+ }
+
+ ngMesh.AddSegment (seg);
+ {
+ // restrict size of elements near the segment
+ SMESH_TNodeXYZ np1( n ), np2( uvPtVec[ i+1 ].node );
+ // get an average size of adjacent segments to avoid sharp change of
+ // element size (regression on issue 0020452, note 0010898)
+ int iPrev = SMESH_MesherHelper::WrapIndex( i-1, nbSegments );
+ int iNext = SMESH_MesherHelper::WrapIndex( i+1, nbSegments );
+ double sumH = segLen[ iPrev ] + segLen[ i ] + segLen[ iNext ];
+ int nbSeg = ( int( segLen[ iPrev ] > sumH / 100.) +
+ int( segLen[ i ] > sumH / 100.) +
+ int( segLen[ iNext ] > sumH / 100.));
+ if ( nbSeg > 0 )
+ RestrictLocalSize( ngMesh, 0.5*(np1+np2), sumH / nbSeg );
+ }
+ if ( isInternalWire )
+ {
+ swap (seg[0], seg[1]);
+ swap( seg.epgeominfo[0], seg.epgeominfo[1] );
+ seg.edgenr = ngMesh.GetNSeg() + 1; // segment id
+ ngMesh.AddSegment (seg);
+ }
+ } // loop on segments on a wire
+
+ // close chain of segments
+ if ( nbSegments > 0 )
+ {
+ netgen::Segment& lastSeg = ngMesh.LineSegment( ngMesh.GetNSeg() - int( isInternalWire));
+ const SMDS_MeshNode * lastNode = uvPtVec.back().node;
+ lastSeg[1] = node2ngID.insert( make_pair( lastNode, lastSeg[1] )).first->second;
+ if ( lastSeg[1] > ngMesh.GetNP() )
+ {
+ netgen::MeshPoint mp( netgen::Point<3> (lastNode->X(), lastNode->Y(), lastNode->Z()) );
+ ngMesh.AddPoint ( mp, 1, netgen::EDGEPOINT );
+ nodeVec.push_back( lastNode );
+ }
+ if ( isInternalWire )
+ {
+ netgen::Segment& realLastSeg = ngMesh.LineSegment( ngMesh.GetNSeg() );
+ realLastSeg[0] = lastSeg[1];
+ }
+ }
+
+#ifdef DUMP_SEGMENTS
+ cout << "BEGIN WIRE " << iW << endl;
+ for ( int i = prevNbNGSeg+1; i <= ngMesh.GetNSeg(); ++i )
+ {
+ netgen::Segment& seg = ngMesh.LineSegment( i );
+ if ( i > 1 ) {
+ netgen::Segment& prevSeg = ngMesh.LineSegment( i-1 );
+ if ( seg[0] == prevSeg[1] && seg[1] == prevSeg[0] )
+ {
+ cout << "Segment: " << seg.edgenr << endl << "\tis REVRESE of the previous one" << endl;
+ continue;
+ }
+ }
+ cout << "Segment: " << seg.edgenr << endl
+ << "\tp1: " << seg[0] << endl
+ << "\tp2: " << seg[1] << endl
+ << "\tp0 param: " << seg.epgeominfo[ 0 ].dist << endl
+ << "\tp0 uv: " << seg.epgeominfo[ 0 ].u <<", "<< seg.epgeominfo[ 0 ].v << endl
+ << "\tp0 edge: " << seg.epgeominfo[ 0 ].edgenr << endl
+ << "\tp1 param: " << seg.epgeominfo[ 1 ].dist << endl
+ << "\tp1 uv: " << seg.epgeominfo[ 1 ].u <<", "<< seg.epgeominfo[ 1 ].v << endl
+ << "\tp1 edge: " << seg.epgeominfo[ 1 ].edgenr << endl;
+ }
+ cout << "--END WIRE " << iW << endl;
+#endif
+
+ } // loop on WIREs of a FACE
+
+ // add a segment instead of an internal vertex
+ if ( wasNgMeshEmpty )
+ {
+ NETGENPlugin_Internals intShapes( *helper.GetMesh(), helper.GetSubShape(), /*is3D=*/false );
+ AddIntVerticesInFaces( geom, ngMesh, nodeVec, intShapes );
+ }
+ ngMesh.CalcSurfacesOfNode();
+
+ return TError();
+}
+
+//================================================================================
+/*!
+ * \brief Fill SMESH mesh according to contents of netgen mesh
+ * \param occgeo - container of OCCT geometry to mesh
+ * \param ngMesh - netgen mesh
+ * \param initState - bn of entities in netgen mesh before computing
+ * \param sMesh - SMESH mesh to fill in
+ * \param nodeVec - vector of nodes in which node index == netgen ID
+ * \retval int - error
+ */
+//================================================================================
+
+int NETGENPlugin_Mesher::FillSMesh(const netgen::OCCGeometry& occgeo,
+ netgen::Mesh& ngMesh,
+ const NETGENPlugin_ngMeshInfo& initState,
+ SMESH_Mesh& sMesh,
+ std::vector<const SMDS_MeshNode*>& nodeVec,
+ SMESH_Comment& comment)
+{
+ int nbNod = ngMesh.GetNP();
+ int nbSeg = ngMesh.GetNSeg();
+ int nbFac = ngMesh.GetNSE();
+ int nbVol = ngMesh.GetNE();
+
+ SMESHDS_Mesh* meshDS = sMesh.GetMeshDS();
+
+ // -------------------------------------
+ // Create and insert nodes into nodeVec
+ // -------------------------------------
+
+ nodeVec.resize( nbNod + 1 );
+ int i, nbInitNod = initState._nbNodes;
+ for (i = nbInitNod+1; i <= nbNod; ++i )
+ {
+ const netgen::MeshPoint& ngPoint = ngMesh.Point(i);
+ SMDS_MeshNode* node = NULL;
+ TopoDS_Vertex aVert;
+ // First, netgen creates nodes on vertices in occgeo.vmap,
+ // so node index corresponds to vertex index
+ // but (issue 0020776) netgen does not create nodes with equal coordinates
+ if ( i-nbInitNod <= occgeo.vmap.Extent() )
+ {
+ gp_Pnt p ( NGPOINT_COORDS(ngPoint) );
+ for (int iV = i-nbInitNod; aVert.IsNull() && iV <= occgeo.vmap.Extent(); ++iV)
+ {
+ aVert = TopoDS::Vertex( occgeo.vmap( iV ) );
+ gp_Pnt pV = BRep_Tool::Pnt( aVert );
+ if ( p.SquareDistance( pV ) > 1e-20 )
+ aVert.Nullify();
+ else
+ node = const_cast<SMDS_MeshNode*>( SMESH_Algo::VertexNode( aVert, meshDS ));
}
- if (!vol)
+ }
+ if (!node) // node not found on vertex
+ {
+ node = meshDS->AddNode( NGPOINT_COORDS( ngPoint ));
+ if (!aVert.IsNull())
+ meshDS->SetNodeOnVertex(node, aVert);
+ }
+ nodeVec[i] = node;
+ }
+
+ // -------------------------------------------
+ // Create mesh segments along geometric edges
+ // -------------------------------------------
+
+ int nbInitSeg = initState._nbSegments;
+ for (i = nbInitSeg+1; i <= nbSeg; ++i )
+ {
+ const netgen::Segment& seg = ngMesh.LineSegment(i);
+ TopoDS_Edge aEdge;
+ int pinds[3] = { seg.pnums[0], seg.pnums[1], seg.pnums[2] };
+ int nbp = 0;
+ double param2 = 0;
+ for (int j=0; j < 3; ++j)
+ {
+ int pind = pinds[j];
+ if (pind <= 0 || !nodeVec_ACCESS(pind))
+ break;
+ ++nbp;
+ double param;
+ if (j < 2)
+ {
+ if (aEdge.IsNull())
+ {
+ int aGeomEdgeInd = seg.epgeominfo[j].edgenr;
+ if (aGeomEdgeInd > 0 && aGeomEdgeInd <= occgeo.emap.Extent())
+ aEdge = TopoDS::Edge(occgeo.emap(aGeomEdgeInd));
+ }
+ param = seg.epgeominfo[j].dist;
+ param2 += param;
+ }
+ else // middle point
+ {
+ param = param2 * 0.5;
+ }
+ if (!aEdge.IsNull() && nodeVec_ACCESS(pind)->getshapeId() < 1)
+ {
+ meshDS->SetNodeOnEdge(nodeVec_ACCESS(pind), aEdge, param);
+ }
+ }
+ if ( nbp > 1 )
+ {
+ SMDS_MeshEdge* edge = 0;
+ if (nbp == 2) // second order ?
+ {
+ if ( meshDS->FindEdge( nodeVec_ACCESS(pinds[0]), nodeVec_ACCESS(pinds[1])))
+ continue;
+ edge = meshDS->AddEdge(nodeVec_ACCESS(pinds[0]), nodeVec_ACCESS(pinds[1]));
+ }
+ else
+ {
+ if ( meshDS->FindEdge( nodeVec_ACCESS(pinds[0]), nodeVec_ACCESS(pinds[1]),
+ nodeVec_ACCESS(pinds[2])))
+ continue;
+ edge = meshDS->AddEdge(nodeVec_ACCESS(pinds[0]), nodeVec_ACCESS(pinds[1]),
+ nodeVec_ACCESS(pinds[2]));
+ }
+ if (!edge)
{
- MESSAGE("Cannot create a mesh volume");
- isOK = false;
+ if ( comment.empty() ) comment << "Cannot create a mesh edge";
+ MESSAGE("Cannot create a mesh edge");
+ nbSeg = nbFac = nbVol = 0;
break;
}
- if (!aSolid.IsNull())
- _meshDS->SetMeshElementOnShape(vol, aSolid);
+ if ( !aEdge.IsNull() && edge->getshapeId() < 1 )
+ meshDS->SetMeshElementOnShape(edge, aEdge);
+ }
+ else if ( comment.empty() )
+ {
+ comment << "Invalid netgen segment #" << i;
}
}
- nglib::Ng_DeleteMesh((nglib::Ng_Mesh*)ngMesh);
- nglib::Ng_Exit();
+ // ----------------------------------------
+ // Create mesh faces along geometric faces
+ // ----------------------------------------
- return isOK;
+ int nbInitFac = initState._nbFaces;
+ int quadFaceID = ngMesh.GetNFD() + 1;
+ if ( nbInitFac < nbFac )
+ // add a faces descriptor to exclude qudrangle elements generated by NETGEN
+ // from computation of 3D mesh
+ ngMesh.AddFaceDescriptor (netgen::FaceDescriptor(quadFaceID, /*solid1=*/0, /*solid2=*/0, 0));
+
+ for (i = nbInitFac+1; i <= nbFac; ++i )
+ {
+ const netgen::Element2d& elem = ngMesh.SurfaceElement(i);
+ int aGeomFaceInd = elem.GetIndex();
+ TopoDS_Face aFace;
+ if (aGeomFaceInd > 0 && aGeomFaceInd <= occgeo.fmap.Extent())
+ aFace = TopoDS::Face(occgeo.fmap(aGeomFaceInd));
+ vector<SMDS_MeshNode*> nodes;
+ for (int j=1; j <= elem.GetNP(); ++j)
+ {
+ int pind = elem.PNum(j);
+ if ( pind < 1 || pind >= nodeVec.size() )
+ break;
+ if ( SMDS_MeshNode* node = nodeVec_ACCESS(pind))
+ {
+ nodes.push_back(node);
+ if (!aFace.IsNull() && node->getshapeId() < 1)
+ {
+ const netgen::PointGeomInfo& pgi = elem.GeomInfoPi(j);
+ meshDS->SetNodeOnFace(node, aFace, pgi.u, pgi.v);
+ }
+ }
+ }
+ if ( nodes.size() != elem.GetNP() )
+ {
+ if ( comment.empty() )
+ comment << "Invalid netgen 2d element #" << i;
+ continue; // bad node ids
+ }
+ SMDS_MeshFace* face = NULL;
+ switch (elem.GetType())
+ {
+ case netgen::TRIG:
+ face = meshDS->AddFace(nodes[0],nodes[1],nodes[2]);
+ break;
+ case netgen::QUAD:
+ face = meshDS->AddFace(nodes[0],nodes[1],nodes[2],nodes[3]);
+ // exclude qudrangle elements from computation of 3D mesh
+ const_cast< netgen::Element2d& >( elem ).SetIndex( quadFaceID );
+ break;
+ case netgen::TRIG6:
+ face = meshDS->AddFace(nodes[0],nodes[1],nodes[2],nodes[5],nodes[3],nodes[4]);
+ break;
+ case netgen::QUAD8:
+ face = meshDS->AddFace(nodes[0],nodes[1],nodes[2],nodes[3],
+ nodes[4],nodes[7],nodes[5],nodes[6]);
+ // exclude qudrangle elements from computation of 3D mesh
+ const_cast< netgen::Element2d& >( elem ).SetIndex( quadFaceID );
+ break;
+ default:
+ MESSAGE("NETGEN created a face of unexpected type, ignoring");
+ continue;
+ }
+ if (!face)
+ {
+ if ( comment.empty() ) comment << "Cannot create a mesh face";
+ MESSAGE("Cannot create a mesh face");
+ nbSeg = nbFac = nbVol = 0;
+ break;
+ }
+ if (!aFace.IsNull())
+ meshDS->SetMeshElementOnShape(face, aFace);
+ }
+
+ // ------------------
+ // Create tetrahedra
+ // ------------------
+
+ for (i = 1; i <= nbVol; ++i)
+ {
+ const netgen::Element& elem = ngMesh.VolumeElement(i);
+ int aSolidInd = elem.GetIndex();
+ TopoDS_Solid aSolid;
+ if (aSolidInd > 0 && aSolidInd <= occgeo.somap.Extent())
+ aSolid = TopoDS::Solid(occgeo.somap(aSolidInd));
+ vector<SMDS_MeshNode*> nodes;
+ for (int j=1; j <= elem.GetNP(); ++j)
+ {
+ int pind = elem.PNum(j);
+ if ( pind < 1 || pind >= nodeVec.size() )
+ break;
+ if ( SMDS_MeshNode* node = nodeVec_ACCESS(pind) )
+ {
+ nodes.push_back(node);
+ if ( !aSolid.IsNull() && node->getshapeId() < 1 )
+ meshDS->SetNodeInVolume(node, aSolid);
+ }
+ }
+ if ( nodes.size() != elem.GetNP() )
+ {
+ if ( comment.empty() )
+ comment << "Invalid netgen 3d element #" << i;
+ continue;
+ }
+ SMDS_MeshVolume* vol = NULL;
+ switch (elem.GetType())
+ {
+ case netgen::TET:
+ vol = meshDS->AddVolume(nodes[0],nodes[1],nodes[2],nodes[3]);
+ break;
+ case netgen::TET10:
+ vol = meshDS->AddVolume(nodes[0],nodes[1],nodes[2],nodes[3],
+ nodes[4],nodes[7],nodes[5],nodes[6],nodes[8],nodes[9]);
+ break;
+ default:
+ MESSAGE("NETGEN created a volume of unexpected type, ignoring");
+ continue;
+ }
+ if (!vol)
+ {
+ if ( comment.empty() ) comment << "Cannot create a mesh volume";
+ MESSAGE("Cannot create a mesh volume");
+ nbSeg = nbFac = nbVol = 0;
+ break;
+ }
+ if (!aSolid.IsNull())
+ meshDS->SetMeshElementOnShape(vol, aSolid);
+ }
+ return comment.empty() ? 0 : 1;
+}
+
+namespace
+{
+ //================================================================================
+ /*!
+ * \brief Restrict size of elements on the given edge
+ */
+ //================================================================================
+
+ void setLocalSize(const TopoDS_Edge& edge,
+ double size,
+ netgen::Mesh& mesh)
+ {
+ const int nb = 1000;
+ Standard_Real u1, u2;
+ Handle(Geom_Curve) curve = BRep_Tool::Curve(edge, u1, u2);
+ if ( curve.IsNull() )
+ {
+ TopoDS_Iterator vIt( edge );
+ if ( !vIt.More() ) return;
+ gp_Pnt p = BRep_Tool::Pnt( TopoDS::Vertex( vIt.Value() ));
+ NETGENPlugin_Mesher::RestrictLocalSize( mesh, p.XYZ(), size );
+ }
+ else
+ {
+ Standard_Real delta = (u2-u1)/nb;
+ for(int i=0; i<nb; i++)
+ {
+ Standard_Real u = u1 + delta*i;
+ gp_Pnt p = curve->Value(u);
+ NETGENPlugin_Mesher::RestrictLocalSize( mesh, p.XYZ(), size );
+ netgen::Point3d pi(p.X(), p.Y(), p.Z());
+ double resultSize = mesh.GetH(pi);
+ if ( resultSize - size > 0.1*size )
+ // netgen does restriction iff oldH/newH > 1.2 (localh.cpp:136)
+ NETGENPlugin_Mesher::RestrictLocalSize( mesh, p.XYZ(), resultSize/1.201 );
+ }
+ }
+ }
+
+ //================================================================================
+ /*!
+ * \brief Convert error into text
+ */
+ //================================================================================
+
+ std::string text(int err)
+ {
+ if ( !err )
+ return string("");
+ return
+ SMESH_Comment("Error in netgen::OCCGenerateMesh() at ") << netgen::multithread.task;
+ }
+
+ //================================================================================
+ /*!
+ * \brief Convert exception into text
+ */
+ //================================================================================
+
+ std::string text(Standard_Failure& ex)
+ {
+ SMESH_Comment str("Exception in netgen::OCCGenerateMesh()");
+ str << " at " << netgen::multithread.task
+ << ": " << ex.DynamicType()->Name();
+ if ( ex.GetMessageString() && strlen( ex.GetMessageString() ))
+ str << ": " << ex.GetMessageString();
+ return str;
+ }
+ //================================================================================
+ /*!
+ * \brief Convert exception into text
+ */
+ //================================================================================
+
+ std::string text(netgen::NgException& ex)
+ {
+ SMESH_Comment str("NgException");
+ if ( strlen( netgen::multithread.task ) > 0 )
+ str << " at " << netgen::multithread.task;
+ str << ": " << ex.What();
+ return str;
+ }
+
+ //================================================================================
+ /*!
+ * \brief Looks for triangles lying on a SOLID
+ */
+ //================================================================================
+
+ bool hasBadElemOnSolid( const list<const SMDS_MeshElement*>& elems,
+ SMESH_subMesh* solidSM )
+ {
+ TopTools_IndexedMapOfShape solidSubs;
+ TopExp::MapShapes( solidSM->GetSubShape(), solidSubs );
+ SMESHDS_Mesh* mesh = solidSM->GetFather()->GetMeshDS();
+
+ list<const SMDS_MeshElement*>::const_iterator e = elems.begin();
+ for ( ; e != elems.end(); ++e )
+ {
+ const SMDS_MeshElement* elem = *e;
+ if ( elem->GetType() != SMDSAbs_Face )
+ continue;
+ int nbNodesOnSolid = 0;
+ SMDS_NodeIteratorPtr nIt = elem->nodeIterator();
+ while ( nIt->more() )
+ {
+ const SMDS_MeshNode* n = nIt->next();
+ const TopoDS_Shape& s = mesh->IndexToShape( n->getshapeId() );
+ nbNodesOnSolid += ( !s.IsNull() && solidSubs.Contains( s ));
+ if ( nbNodesOnSolid > 2 )
+ return true;
+ }
+ }
+ return false;
+ }
+
+ const double edgeMeshingTime = 0.001;
+ const double faceMeshingTime = 0.019;
+ const double edgeFaceMeshingTime = edgeMeshingTime + faceMeshingTime;
+ const double faceOptimizTime = 0.06;
+ const double voluMeshingTime = 0.15;
+ const double volOptimizeTime = 0.77;
+}
+
+//=============================================================================
+/*!
+ * Here we are going to use the NETGEN mesher
+ */
+//=============================================================================
+
+bool NETGENPlugin_Mesher::Compute()
+{
+ NETGENPlugin_NetgenLibWrapper ngLib;
+
+ netgen::MeshingParameters& mparams = netgen::mparam;
+ MESSAGE("Compute with:\n"
+ " max size = " << mparams.maxh << "\n"
+ " segments per edge = " << mparams.segmentsperedge);
+ MESSAGE("\n"
+ " growth rate = " << mparams.grading << "\n"
+ " elements per radius = " << mparams.curvaturesafety << "\n"
+ " second order = " << mparams.secondorder << "\n"
+ " quad allowed = " << mparams.quad << "\n"
+ " surface curvature = " << mparams.uselocalh << "\n"
+ " fuse edges = " << netgen::merge_solids);
+
+ SMESH_ComputeErrorPtr error = SMESH_ComputeError::New();
+
+ static string debugFile = "/tmp/ngMesh.py"; /* to call toPython( ngMesh, debugFile )
+ while debugging netgen */
+ // -------------------------
+ // Prepare OCC geometry
+ // -------------------------
+
+ netgen::OCCGeometry occgeo;
+ list< SMESH_subMesh* > meshedSM[3]; // for 0-2 dimensions
+ NETGENPlugin_Internals internals( *_mesh, _shape, _isVolume );
+ PrepareOCCgeometry( occgeo, _shape, *_mesh, meshedSM, &internals );
+ _occgeom = &occgeo;
+
+ _totalTime = edgeFaceMeshingTime;
+ if ( _optimize )
+ _totalTime += faceOptimizTime;
+ if ( _isVolume )
+ _totalTime += voluMeshingTime + ( _optimize ? volOptimizeTime : 0 );
+ double doneTime = 0;
+ _ticTime = -1;
+ _progressTic = 1;
+ _curShapeIndex = -1;
+
+ // -------------------------
+ // Generate the mesh
+ // -------------------------
+
+ _ngMesh = NULL;
+ NETGENPlugin_ngMeshInfo initState; // it remembers size of ng mesh equal to size of Smesh
+
+ SMESH_Comment comment;
+ int err = 0;
+
+ // vector of nodes in which node index == netgen ID
+ vector< const SMDS_MeshNode* > nodeVec;
+
+ {
+ // ----------------
+ // compute 1D mesh
+ // ----------------
+ if ( _simpleHyp )
+ {
+ // not to RestrictLocalH() according to curvature during MESHCONST_ANALYSE
+ mparams.uselocalh = false;
+ mparams.grading = 0.8; // not limitited size growth
+
+ if ( _simpleHyp->GetNumberOfSegments() )
+ // nb of segments
+ mparams.maxh = occgeo.boundingbox.Diam();
+ else
+ // segment length
+ mparams.maxh = _simpleHyp->GetLocalLength();
+ }
+
+ if ( mparams.maxh == 0.0 )
+ mparams.maxh = occgeo.boundingbox.Diam();
+ if ( _simpleHyp || ( mparams.minh == 0.0 && _fineness != NETGENPlugin_Hypothesis::UserDefined))
+ mparams.minh = GetDefaultMinSize( _shape, mparams.maxh );
+
+ // Local size on faces
+ occgeo.face_maxh = mparams.maxh;
+
+ // Let netgen create _ngMesh and calculate element size on not meshed shapes
+#ifndef NETGEN_V5
+ char *optstr = 0;
+#endif
+ int startWith = netgen::MESHCONST_ANALYSE;
+ int endWith = netgen::MESHCONST_ANALYSE;
+ try
+ {
+ OCC_CATCH_SIGNALS;
+#ifdef NETGEN_V5
+ err = netgen::OCCGenerateMesh(occgeo, _ngMesh, mparams, startWith, endWith);
+#else
+ err = netgen::OCCGenerateMesh(occgeo, _ngMesh, startWith, endWith, optstr);
+#endif
+ if(netgen::multithread.terminate)
+ return false;
+
+ comment << text(err);
+ }
+ catch (Standard_Failure& ex)
+ {
+ comment << text(ex);
+ }
+ err = 0; //- MESHCONST_ANALYSE isn't so important step
+ if ( !_ngMesh )
+ return false;
+ ngLib.setMesh(( Ng_Mesh*) _ngMesh );
+
+ _ngMesh->ClearFaceDescriptors(); // we make descriptors our-self
+
+ if ( _simpleHyp )
+ {
+ // Pass 1D simple parameters to NETGEN
+ // --------------------------------
+ int nbSeg = _simpleHyp->GetNumberOfSegments();
+ double segSize = _simpleHyp->GetLocalLength();
+ for ( int iE = 1; iE <= occgeo.emap.Extent(); ++iE )
+ {
+ const TopoDS_Edge& e = TopoDS::Edge( occgeo.emap(iE));
+ if ( nbSeg )
+ segSize = SMESH_Algo::EdgeLength( e ) / ( nbSeg - 0.4 );
+ setLocalSize( e, segSize, *_ngMesh );
+ }
+ }
+ else // if ( ! _simpleHyp )
+ {
+ // Local size on vertices and edges
+ // --------------------------------
+ for(std::map<int,double>::const_iterator it=EdgeId2LocalSize.begin(); it!=EdgeId2LocalSize.end(); it++)
+ {
+ int key = (*it).first;
+ double hi = (*it).second;
+ const TopoDS_Shape& shape = ShapesWithLocalSize.FindKey(key);
+ const TopoDS_Edge& e = TopoDS::Edge(shape);
+ setLocalSize( e, hi, *_ngMesh );
+ }
+ for(std::map<int,double>::const_iterator it=VertexId2LocalSize.begin(); it!=VertexId2LocalSize.end(); it++)
+ {
+ int key = (*it).first;
+ double hi = (*it).second;
+ const TopoDS_Shape& shape = ShapesWithLocalSize.FindKey(key);
+ const TopoDS_Vertex& v = TopoDS::Vertex(shape);
+ gp_Pnt p = BRep_Tool::Pnt(v);
+ NETGENPlugin_Mesher::RestrictLocalSize( *_ngMesh, p.XYZ(), hi );
+ }
+ for(map<int,double>::const_iterator it=FaceId2LocalSize.begin();
+ it!=FaceId2LocalSize.end(); it++)
+ {
+ int key = (*it).first;
+ double val = (*it).second;
+ const TopoDS_Shape& shape = ShapesWithLocalSize.FindKey(key);
+ int faceNgID = occgeo.fmap.FindIndex(shape);
+ occgeo.SetFaceMaxH(faceNgID, val);
+ for ( TopExp_Explorer edgeExp( shape, TopAbs_EDGE ); edgeExp.More(); edgeExp.Next() )
+ setLocalSize( TopoDS::Edge( edgeExp.Current() ), val, *_ngMesh );
+ }
+ }
+
+ // Precompute internal edges (issue 0020676) in order to
+ // add mesh on them correctly (twice) to netgen mesh
+ if ( !err && internals.hasInternalEdges() )
+ {
+ // load internal shapes into OCCGeometry
+ netgen::OCCGeometry intOccgeo;
+ internals.getInternalEdges( intOccgeo.fmap, intOccgeo.emap, intOccgeo.vmap, meshedSM );
+ intOccgeo.boundingbox = occgeo.boundingbox;
+ intOccgeo.shape = occgeo.shape;
+ intOccgeo.face_maxh.SetSize(intOccgeo.fmap.Extent());
+ intOccgeo.face_maxh = netgen::mparam.maxh;
+ netgen::Mesh *tmpNgMesh = NULL;
+ try
+ {
+ OCC_CATCH_SIGNALS;
+ // compute local H on internal shapes in the main mesh
+ //OCCSetLocalMeshSize(intOccgeo, *_ngMesh); it deletes _ngMesh->localH
+
+ // let netgen create a temporary mesh
+#ifdef NETGEN_V5
+ netgen::OCCGenerateMesh(intOccgeo, tmpNgMesh, mparams, startWith, endWith);
+#else
+ netgen::OCCGenerateMesh(intOccgeo, tmpNgMesh, startWith, endWith, optstr);
+#endif
+ if(netgen::multithread.terminate)
+ return false;
+
+ // copy LocalH from the main to temporary mesh
+ initState.transferLocalH( _ngMesh, tmpNgMesh );
+
+ // compute mesh on internal edges
+ startWith = endWith = netgen::MESHCONST_MESHEDGES;
+#ifdef NETGEN_V5
+ err = netgen::OCCGenerateMesh(intOccgeo, tmpNgMesh, mparams, startWith, endWith);
+#else
+ err = netgen::OCCGenerateMesh(intOccgeo, tmpNgMesh, startWith, endWith, optstr);
+#endif
+ comment << text(err);
+ }
+ catch (Standard_Failure& ex)
+ {
+ comment << text(ex);
+ err = 1;
+ }
+ initState.restoreLocalH( tmpNgMesh );
+
+ // fill SMESH by netgen mesh
+ vector< const SMDS_MeshNode* > tmpNodeVec;
+ FillSMesh( intOccgeo, *tmpNgMesh, initState, *_mesh, tmpNodeVec, comment );
+ err = ( err || !comment.empty() );
+
+ nglib::Ng_DeleteMesh((nglib::Ng_Mesh*)tmpNgMesh);
+ }
+
+ // Fill _ngMesh with nodes and segments of computed submeshes
+ if ( !err )
+ {
+ err = ! ( FillNgMesh(occgeo, *_ngMesh, nodeVec, meshedSM[ MeshDim_0D ]) &&
+ FillNgMesh(occgeo, *_ngMesh, nodeVec, meshedSM[ MeshDim_1D ]));
+ }
+ initState = NETGENPlugin_ngMeshInfo(_ngMesh);
+
+ // Compute 1d mesh
+ if (!err)
+ {
+ startWith = endWith = netgen::MESHCONST_MESHEDGES;
+ try
+ {
+ OCC_CATCH_SIGNALS;
+#ifdef NETGEN_V5
+ err = netgen::OCCGenerateMesh(occgeo, _ngMesh, mparams, startWith, endWith);
+#else
+ err = netgen::OCCGenerateMesh(occgeo, _ngMesh, startWith, endWith, optstr);
+#endif
+ if(netgen::multithread.terminate)
+ return false;
+
+ comment << text(err);
+ }
+ catch (Standard_Failure& ex)
+ {
+ comment << text(ex);
+ err = 1;
+ }
+ }
+ if ( _isVolume )
+ _ticTime = ( doneTime += edgeMeshingTime ) / _totalTime / _progressTic;
+
+ mparams.uselocalh = true; // restore as it is used at surface optimization
+
+ // ---------------------
+ // compute surface mesh
+ // ---------------------
+ if (!err)
+ {
+ // Pass 2D simple parameters to NETGEN
+ if ( _simpleHyp ) {
+ if ( double area = _simpleHyp->GetMaxElementArea() ) {
+ // face area
+ mparams.maxh = sqrt(2. * area/sqrt(3.0));
+ mparams.grading = 0.4; // moderate size growth
+ }
+ else {
+ // length from edges
+ if ( _ngMesh->GetNSeg() ) {
+ double edgeLength = 0;
+ TopTools_MapOfShape visitedEdges;
+ for ( TopExp_Explorer exp( _shape, TopAbs_EDGE ); exp.More(); exp.Next() )
+ if( visitedEdges.Add(exp.Current()) )
+ edgeLength += SMESH_Algo::EdgeLength( TopoDS::Edge( exp.Current() ));
+ // we have to multiply length by 2 since for each TopoDS_Edge there
+ // are double set of NETGEN edges, in other words, we have to
+ // divide _ngMesh->GetNSeg() by 2.
+ mparams.maxh = 2*edgeLength / _ngMesh->GetNSeg();
+ }
+ else {
+ mparams.maxh = 1000;
+ }
+ mparams.grading = 0.2; // slow size growth
+ }
+ mparams.quad = _simpleHyp->GetAllowQuadrangles();
+ mparams.maxh = min( mparams.maxh, occgeo.boundingbox.Diam()/2 );
+ _ngMesh->SetGlobalH (mparams.maxh);
+ netgen::Box<3> bb = occgeo.GetBoundingBox();
+ bb.Increase (bb.Diam()/20);
+ _ngMesh->SetLocalH (bb.PMin(), bb.PMax(), mparams.grading);
+ }
+
+ // Care of vertices internal in faces (issue 0020676)
+ if ( internals.hasInternalVertexInFace() )
+ {
+ // store computed segments in SMESH in order not to create SMESH
+ // edges for ng segments added by AddIntVerticesInFaces()
+ FillSMesh( occgeo, *_ngMesh, initState, *_mesh, nodeVec, comment );
+ // add segments to faces with internal vertices
+ AddIntVerticesInFaces( occgeo, *_ngMesh, nodeVec, internals );
+ initState = NETGENPlugin_ngMeshInfo(_ngMesh);
+ }
+
+ // Build viscous layers
+ if ( _isViscousLayers2D )
+ {
+ if ( !internals.hasInternalVertexInFace() ) {
+ FillSMesh( occgeo, *_ngMesh, initState, *_mesh, nodeVec, comment );
+ initState = NETGENPlugin_ngMeshInfo(_ngMesh);
+ }
+ SMESH_ProxyMesh::Ptr viscousMesh;
+ SMESH_MesherHelper helper( *_mesh );
+ for ( int faceID = 1; faceID <= occgeo.fmap.Extent(); ++faceID )
+ {
+ const TopoDS_Face& F = TopoDS::Face( occgeo.fmap( faceID ));
+ viscousMesh = StdMeshers_ViscousLayers2D::Compute( *_mesh, F );
+ if ( !viscousMesh )
+ return false;
+ // exclude from computation ng segments built on EDGEs of F
+ for (int i = 1; i <= _ngMesh->GetNSeg(); i++)
+ {
+ netgen::Segment & seg = _ngMesh->LineSegment(i);
+ if (seg.si == faceID)
+ seg.si = 0;
+ }
+ // add new segments to _ngMesh instead of excluded ones
+ helper.SetSubShape( F );
+ TSideVector wires =
+ StdMeshers_FaceSide::GetFaceWires( F, *_mesh, /*skipMediumNodes=*/true,
+ error, viscousMesh );
+ error = AddSegmentsToMesh( *_ngMesh, occgeo, wires, helper, nodeVec );
+
+ if ( !error ) error = SMESH_ComputeError::New();
+ }
+ initState = NETGENPlugin_ngMeshInfo(_ngMesh);
+ }
+
+ // Let netgen compute 2D mesh
+ startWith = netgen::MESHCONST_MESHSURFACE;
+ endWith = _optimize ? netgen::MESHCONST_OPTSURFACE : netgen::MESHCONST_MESHSURFACE;
+ try
+ {
+ OCC_CATCH_SIGNALS;
+#ifdef NETGEN_V5
+ err = netgen::OCCGenerateMesh(occgeo, _ngMesh, mparams, startWith, endWith);
+#else
+ err = netgen::OCCGenerateMesh(occgeo, _ngMesh, startWith, endWith, optstr);
+#endif
+ if(netgen::multithread.terminate)
+ return false;
+
+ comment << text (err);
+ }
+ catch (Standard_Failure& ex)
+ {
+ comment << text(ex);
+ //err = 1; -- try to make volumes anyway
+ }
+ catch (netgen::NgException exc)
+ {
+ comment << text(exc);
+ //err = 1; -- try to make volumes anyway
+ }
+ }
+ if ( _isVolume )
+ {
+ doneTime += faceMeshingTime + ( _optimize ? faceOptimizTime : 0 );
+ _ticTime = doneTime / _totalTime / _progressTic;
+ }
+ // ---------------------
+ // generate volume mesh
+ // ---------------------
+ // Fill _ngMesh with nodes and faces of computed 2D submeshes
+ if ( !err && _isVolume && ( !meshedSM[ MeshDim_2D ].empty() || mparams.quad ))
+ {
+ // load SMESH with computed segments and faces
+ FillSMesh( occgeo, *_ngMesh, initState, *_mesh, nodeVec, comment );
+
+ // compute pyramids on quadrangles
+ SMESH_ProxyMesh::Ptr proxyMesh;
+ if ( _mesh->NbQuadrangles() > 0 )
+ for ( int iS = 1; iS <= occgeo.somap.Extent(); ++iS )
+ {
+ StdMeshers_QuadToTriaAdaptor* Adaptor = new StdMeshers_QuadToTriaAdaptor;
+ proxyMesh.reset( Adaptor );
+
+ int nbPyrams = _mesh->NbPyramids();
+ Adaptor->Compute( *_mesh, occgeo.somap(iS) );
+ if ( nbPyrams != _mesh->NbPyramids() )
+ {
+ list< SMESH_subMesh* > quadFaceSM;
+ for (TopExp_Explorer face(occgeo.somap(iS), TopAbs_FACE); face.More(); face.Next())
+ if ( Adaptor->GetProxySubMesh( face.Current() ))
+ {
+ quadFaceSM.push_back( _mesh->GetSubMesh( face.Current() ));
+ meshedSM[ MeshDim_2D ].remove( quadFaceSM.back() );
+ }
+ FillNgMesh(occgeo, *_ngMesh, nodeVec, quadFaceSM, proxyMesh);
+ }
+ }
+ // fill _ngMesh with faces of sub-meshes
+ err = ! ( FillNgMesh(occgeo, *_ngMesh, nodeVec, meshedSM[ MeshDim_2D ]));
+ initState = NETGENPlugin_ngMeshInfo(_ngMesh);
+ //toPython( _ngMesh, "/tmp/ngPython.py");
+ }
+ if (!err && _isVolume)
+ {
+ // Pass 3D simple parameters to NETGEN
+ const NETGENPlugin_SimpleHypothesis_3D* simple3d =
+ dynamic_cast< const NETGENPlugin_SimpleHypothesis_3D* > ( _simpleHyp );
+ if ( simple3d ) {
+ if ( double vol = simple3d->GetMaxElementVolume() ) {
+ // max volume
+ mparams.maxh = pow( 72, 1/6. ) * pow( vol, 1/3. );
+ mparams.maxh = min( mparams.maxh, occgeo.boundingbox.Diam()/2 );
+ }
+ else {
+ // length from faces
+ mparams.maxh = _ngMesh->AverageH();
+ }
+ _ngMesh->SetGlobalH (mparams.maxh);
+ mparams.grading = 0.4;
+#ifdef NETGEN_V5
+ _ngMesh->CalcLocalH(mparams.grading);
+#else
+ _ngMesh->CalcLocalH();
+#endif
+ }
+ // Care of vertices internal in solids and internal faces (issue 0020676)
+ if ( internals.hasInternalVertexInSolid() || internals.hasInternalFaces() )
+ {
+ // store computed faces in SMESH in order not to create SMESH
+ // faces for ng faces added here
+ FillSMesh( occgeo, *_ngMesh, initState, *_mesh, nodeVec, comment );
+ // add ng faces to solids with internal vertices
+ AddIntVerticesInSolids( occgeo, *_ngMesh, nodeVec, internals );
+ // duplicate mesh faces on internal faces
+ FixIntFaces( occgeo, *_ngMesh, internals );
+ initState = NETGENPlugin_ngMeshInfo(_ngMesh);
+ }
+ // Let netgen compute 3D mesh
+ startWith = endWith = netgen::MESHCONST_MESHVOLUME;
+ try
+ {
+ OCC_CATCH_SIGNALS;
+#ifdef NETGEN_V5
+ err = netgen::OCCGenerateMesh(occgeo, _ngMesh, mparams, startWith, endWith);
+#else
+ err = netgen::OCCGenerateMesh(occgeo, _ngMesh, startWith, endWith, optstr);
+#endif
+ if(netgen::multithread.terminate)
+ return false;
+
+ if ( comment.empty() ) // do not overwrite a previos error
+ comment << text(err);
+ }
+ catch (Standard_Failure& ex)
+ {
+ if ( comment.empty() ) // do not overwrite a previos error
+ comment << text(ex);
+ err = 1;
+ }
+ catch (netgen::NgException exc)
+ {
+ if ( comment.empty() ) // do not overwrite a previos error
+ comment << text(exc);
+ err = 1;
+ }
+ _ticTime = ( doneTime += voluMeshingTime ) / _totalTime / _progressTic;
+
+ // Let netgen optimize 3D mesh
+ if ( !err && _optimize )
+ {
+ startWith = endWith = netgen::MESHCONST_OPTVOLUME;
+ try
+ {
+ OCC_CATCH_SIGNALS;
+#ifdef NETGEN_V5
+ err = netgen::OCCGenerateMesh(occgeo, _ngMesh, mparams, startWith, endWith);
+#else
+ err = netgen::OCCGenerateMesh(occgeo, _ngMesh, startWith, endWith, optstr);
+#endif
+ if(netgen::multithread.terminate)
+ return false;
+
+ if ( comment.empty() ) // do not overwrite a previos error
+ comment << text(err);
+ }
+ catch (Standard_Failure& ex)
+ {
+ if ( comment.empty() ) // do not overwrite a previos error
+ comment << text(ex);
+ }
+ catch (netgen::NgException exc)
+ {
+ if ( comment.empty() ) // do not overwrite a previos error
+ comment << text(exc);
+ }
+ }
+ }
+ if (!err && mparams.secondorder > 0)
+ {
+ try
+ {
+ OCC_CATCH_SIGNALS;
+ netgen::OCCRefinementSurfaces ref (occgeo);
+ ref.MakeSecondOrder (*_ngMesh);
+ }
+ catch (Standard_Failure& ex)
+ {
+ if ( comment.empty() ) // do not overwrite a previos error
+ comment << "Exception in netgen at passing to 2nd order ";
+ }
+ catch (netgen::NgException exc)
+ {
+ if ( comment.empty() ) // do not overwrite a previos error
+ comment << exc.What();
+ }
+ }
+ }
+
+ _ticTime = 0.98 / _progressTic;
+
+ int nbNod = _ngMesh->GetNP();
+ int nbSeg = _ngMesh->GetNSeg();
+ int nbFac = _ngMesh->GetNSE();
+ int nbVol = _ngMesh->GetNE();
+ bool isOK = ( !err && (_isVolume ? (nbVol > 0) : (nbFac > 0)) );
+
+ MESSAGE((err ? "Mesh Generation failure" : "End of Mesh Generation") <<
+ ", nb nodes: " << nbNod <<
+ ", nb segments: " << nbSeg <<
+ ", nb faces: " << nbFac <<
+ ", nb volumes: " << nbVol);
+
+ // Feed back the SMESHDS with the generated Nodes and Elements
+ if ( true /*isOK*/ ) // get whatever built
+ FillSMesh( occgeo, *_ngMesh, initState, *_mesh, nodeVec, comment ); //!<
+
+ SMESH_ComputeErrorPtr readErr = ReadErrors(nodeVec);
+ if ( readErr && !readErr->myBadElements.empty() )
+ error = readErr;
+
+ if ( error->IsOK() && ( !isOK || comment.size() > 0 ))
+ error->myName = COMPERR_ALGO_FAILED;
+ if ( !comment.empty() )
+ error->myComment = comment;
+
+ // SetIsAlwaysComputed( true ) to empty sub-meshes, which
+ // appear if the geometry contains coincident sub-shape due
+ // to bool merge_solids = 1; in netgen/libsrc/occ/occgenmesh.cpp
+ const int nbMaps = 2;
+ const TopTools_IndexedMapOfShape* geoMaps[nbMaps] =
+ { & occgeo.vmap, & occgeo.emap/*, & occgeo.fmap*/ };
+ for ( int iMap = 0; iMap < nbMaps; ++iMap )
+ for (int i = 1; i <= geoMaps[iMap]->Extent(); i++)
+ if ( SMESH_subMesh* sm = _mesh->GetSubMeshContaining( geoMaps[iMap]->FindKey(i)))
+ if ( !sm->IsMeshComputed() )
+ sm->SetIsAlwaysComputed( true );
+
+ // set bad compute error to subshapes of all failed sub-shapes
+ if ( !error->IsOK() )
+ {
+ bool pb2D = false, pb3D = false;
+ for (int i = 1; i <= occgeo.fmap.Extent(); i++) {
+ int status = occgeo.facemeshstatus[i-1];
+ if (status == 1 ) continue;
+ if ( SMESH_subMesh* sm = _mesh->GetSubMeshContaining( occgeo.fmap( i ))) {
+ SMESH_ComputeErrorPtr& smError = sm->GetComputeError();
+ if ( !smError || smError->IsOK() ) {
+ if ( status == -1 )
+ smError.reset( new SMESH_ComputeError( *error ));
+ else
+ smError.reset( new SMESH_ComputeError( COMPERR_ALGO_FAILED, "Ignored" ));
+ if ( SMESH_Algo::GetMeshError( sm ) == SMESH_Algo::MEr_OK )
+ smError->myName = COMPERR_WARNING;
+ }
+ pb2D = pb2D || smError->IsKO();
+ }
+ }
+ if ( !pb2D ) // all faces are OK
+ for (int i = 1; i <= occgeo.somap.Extent(); i++)
+ if ( SMESH_subMesh* sm = _mesh->GetSubMeshContaining( occgeo.somap( i )))
+ {
+ bool smComputed = nbVol && !sm->IsEmpty();
+ if ( smComputed && internals.hasInternalVertexInSolid( sm->GetId() ))
+ {
+ int nbIntV = internals.getSolidsWithVertices().find( sm->GetId() )->second.size();
+ SMESHDS_SubMesh* smDS = sm->GetSubMeshDS();
+ smComputed = ( smDS->NbElements() > 0 || smDS->NbNodes() > nbIntV );
+ }
+ SMESH_ComputeErrorPtr& smError = sm->GetComputeError();
+ if ( !smComputed && ( !smError || smError->IsOK() ))
+ {
+ smError.reset( new SMESH_ComputeError( *error ));
+ if ( nbVol && SMESH_Algo::GetMeshError( sm ) == SMESH_Algo::MEr_OK )
+ {
+ smError->myName = COMPERR_WARNING;
+ }
+ else if ( !smError->myBadElements.empty() ) // bad surface mesh
+ {
+ if ( !hasBadElemOnSolid( smError->myBadElements, sm ))
+ smError.reset();
+ }
+ }
+ pb3D = pb3D || ( smError && smError->IsKO() );
+ }
+ if ( !pb2D && !pb3D )
+ err = 0; // no fatal errors, only warnings
+ }
+
+ ngLib._isComputeOk = !err;
+
+ return !err;
+}
+
+//=============================================================================
+/*!
+ * Evaluate
+ */
+//=============================================================================
+bool NETGENPlugin_Mesher::Evaluate(MapShapeNbElems& aResMap)
+{
+ netgen::MeshingParameters& mparams = netgen::mparam;
+
+
+ // -------------------------
+ // Prepare OCC geometry
+ // -------------------------
+ netgen::OCCGeometry occgeo;
+ list< SMESH_subMesh* > meshedSM[4]; // for 0-3 dimensions
+ NETGENPlugin_Internals internals( *_mesh, _shape, _isVolume );
+ PrepareOCCgeometry( occgeo, _shape, *_mesh, meshedSM, &internals );
+
+ bool tooManyElems = false;
+ const int hugeNb = std::numeric_limits<int>::max() / 100;
+
+ // ----------------
+ // evaluate 1D
+ // ----------------
+ // pass 1D simple parameters to NETGEN
+ if ( _simpleHyp )
+ {
+ // not to RestrictLocalH() according to curvature during MESHCONST_ANALYSE
+ mparams.uselocalh = false;
+ mparams.grading = 0.8; // not limitited size growth
+
+ if ( _simpleHyp->GetNumberOfSegments() )
+ // nb of segments
+ mparams.maxh = occgeo.boundingbox.Diam();
+ else
+ // segment length
+ mparams.maxh = _simpleHyp->GetLocalLength();
+ }
+
+ if ( mparams.maxh == 0.0 )
+ mparams.maxh = occgeo.boundingbox.Diam();
+ if ( _simpleHyp || ( mparams.minh == 0.0 && _fineness != NETGENPlugin_Hypothesis::UserDefined))
+ mparams.minh = GetDefaultMinSize( _shape, mparams.maxh );
+
+ // let netgen create _ngMesh and calculate element size on not meshed shapes
+ NETGENPlugin_NetgenLibWrapper ngLib;
+ netgen::Mesh *ngMesh = NULL;
+#ifndef NETGEN_V5
+ char *optstr = 0;
+#endif
+ int startWith = netgen::MESHCONST_ANALYSE;
+ int endWith = netgen::MESHCONST_MESHEDGES;
+#ifdef NETGEN_V5
+ int err = netgen::OCCGenerateMesh(occgeo, ngMesh, mparams, startWith, endWith);
+#else
+ int err = netgen::OCCGenerateMesh(occgeo, ngMesh, startWith, endWith, optstr);
+#endif
+
+ if(netgen::multithread.terminate)
+ return false;
+
+ ngLib.setMesh(( Ng_Mesh*) ngMesh );
+ if (err) {
+ if ( SMESH_subMesh* sm = _mesh->GetSubMeshContaining( _shape ))
+ sm->GetComputeError().reset( new SMESH_ComputeError( COMPERR_ALGO_FAILED ));
+ return false;
+ }
+ if ( _simpleHyp )
+ {
+ // Pass 1D simple parameters to NETGEN
+ // --------------------------------
+ int nbSeg = _simpleHyp->GetNumberOfSegments();
+ double segSize = _simpleHyp->GetLocalLength();
+ for ( int iE = 1; iE <= occgeo.emap.Extent(); ++iE )
+ {
+ const TopoDS_Edge& e = TopoDS::Edge( occgeo.emap(iE));
+ if ( nbSeg )
+ segSize = SMESH_Algo::EdgeLength( e ) / ( nbSeg - 0.4 );
+ setLocalSize( e, segSize, *ngMesh );
+ }
+ }
+ else // if ( ! _simpleHyp )
+ {
+ // Local size on vertices and edges
+ // --------------------------------
+ for(std::map<int,double>::const_iterator it=EdgeId2LocalSize.begin(); it!=EdgeId2LocalSize.end(); it++)
+ {
+ int key = (*it).first;
+ double hi = (*it).second;
+ const TopoDS_Shape& shape = ShapesWithLocalSize.FindKey(key);
+ const TopoDS_Edge& e = TopoDS::Edge(shape);
+ setLocalSize( e, hi, *ngMesh );
+ }
+ for(std::map<int,double>::const_iterator it=VertexId2LocalSize.begin(); it!=VertexId2LocalSize.end(); it++)
+ {
+ int key = (*it).first;
+ double hi = (*it).second;
+ const TopoDS_Shape& shape = ShapesWithLocalSize.FindKey(key);
+ const TopoDS_Vertex& v = TopoDS::Vertex(shape);
+ gp_Pnt p = BRep_Tool::Pnt(v);
+ NETGENPlugin_Mesher::RestrictLocalSize( *ngMesh, p.XYZ(), hi );
+ }
+ for(map<int,double>::const_iterator it=FaceId2LocalSize.begin();
+ it!=FaceId2LocalSize.end(); it++)
+ {
+ int key = (*it).first;
+ double val = (*it).second;
+ const TopoDS_Shape& shape = ShapesWithLocalSize.FindKey(key);
+ int faceNgID = occgeo.fmap.FindIndex(shape);
+ occgeo.SetFaceMaxH(faceNgID, val);
+ for ( TopExp_Explorer edgeExp( shape, TopAbs_EDGE ); edgeExp.More(); edgeExp.Next() )
+ setLocalSize( TopoDS::Edge( edgeExp.Current() ), val, *ngMesh );
+ }
+ }
+ // calculate total nb of segments and length of edges
+ double fullLen = 0.0;
+ int fullNbSeg = 0;
+ int entity = mparams.secondorder > 0 ? SMDSEntity_Quad_Edge : SMDSEntity_Edge;
+ TopTools_DataMapOfShapeInteger Edge2NbSeg;
+ for (TopExp_Explorer exp(_shape, TopAbs_EDGE); exp.More(); exp.Next())
+ {
+ TopoDS_Edge E = TopoDS::Edge( exp.Current() );
+ if( !Edge2NbSeg.Bind(E,0) )
+ continue;
+
+ double aLen = SMESH_Algo::EdgeLength(E);
+ fullLen += aLen;
+
+ vector<int>& aVec = aResMap[_mesh->GetSubMesh(E)];
+ if ( aVec.empty() )
+ aVec.resize( SMDSEntity_Last, 0);
+ else
+ fullNbSeg += aVec[ entity ];
+ }
+
+ // store nb of segments computed by Netgen
+ NCollection_Map<Link> linkMap;
+ for (int i = 1; i <= ngMesh->GetNSeg(); ++i )
+ {
+ const netgen::Segment& seg = ngMesh->LineSegment(i);
+ Link link(seg[0], seg[1]);
+ if ( !linkMap.Add( link )) continue;
+ int aGeomEdgeInd = seg.epgeominfo[0].edgenr;
+ if (aGeomEdgeInd > 0 && aGeomEdgeInd <= occgeo.emap.Extent())
+ {
+ vector<int>& aVec = aResMap[_mesh->GetSubMesh(occgeo.emap(aGeomEdgeInd))];
+ aVec[ entity ]++;
+ }
+ }
+ // store nb of nodes on edges computed by Netgen
+ TopTools_DataMapIteratorOfDataMapOfShapeInteger Edge2NbSegIt(Edge2NbSeg);
+ for (; Edge2NbSegIt.More(); Edge2NbSegIt.Next())
+ {
+ vector<int>& aVec = aResMap[_mesh->GetSubMesh(Edge2NbSegIt.Key())];
+ if ( aVec[ entity ] > 1 && aVec[ SMDSEntity_Node ] == 0 )
+ aVec[SMDSEntity_Node] = mparams.secondorder > 0 ? 2*aVec[ entity ]-1 : aVec[ entity ]-1;
+
+ fullNbSeg += aVec[ entity ];
+ Edge2NbSeg( Edge2NbSegIt.Key() ) = aVec[ entity ];
+ }
+ if ( fullNbSeg == 0 )
+ return false;
+
+ // ----------------
+ // evaluate 2D
+ // ----------------
+ if ( _simpleHyp ) {
+ if ( double area = _simpleHyp->GetMaxElementArea() ) {
+ // face area
+ mparams.maxh = sqrt(2. * area/sqrt(3.0));
+ mparams.grading = 0.4; // moderate size growth
+ }
+ else {
+ // length from edges
+ mparams.maxh = fullLen/fullNbSeg;
+ mparams.grading = 0.2; // slow size growth
+ }
+ }
+ mparams.maxh = min( mparams.maxh, occgeo.boundingbox.Diam()/2 );
+ mparams.maxh = min( mparams.maxh, fullLen/fullNbSeg * (1. + mparams.grading));
+
+ for (TopExp_Explorer exp(_shape, TopAbs_FACE); exp.More(); exp.Next())
+ {
+ TopoDS_Face F = TopoDS::Face( exp.Current() );
+ SMESH_subMesh *sm = _mesh->GetSubMesh(F);
+ GProp_GProps G;
+ BRepGProp::SurfaceProperties(F,G);
+ double anArea = G.Mass();
+ tooManyElems = tooManyElems || ( anArea/hugeNb > mparams.maxh*mparams.maxh );
+ int nb1d = 0;
+ if ( !tooManyElems )
+ {
+ TopTools_MapOfShape egdes;
+ for (TopExp_Explorer exp1(F,TopAbs_EDGE); exp1.More(); exp1.Next())
+ if ( egdes.Add( exp1.Current() ))
+ nb1d += Edge2NbSeg.Find(exp1.Current());
+ }
+ int nbFaces = tooManyElems ? hugeNb : int( 4*anArea / (mparams.maxh*mparams.maxh*sqrt(3.)));
+ int nbNodes = tooManyElems ? hugeNb : (( nbFaces*3 - (nb1d-1)*2 ) / 6 + 1 );
+
+ vector<int> aVec(SMDSEntity_Last, 0);
+ if( mparams.secondorder > 0 ) {
+ int nb1d_in = (nbFaces*3 - nb1d) / 2;
+ aVec[SMDSEntity_Node] = nbNodes + nb1d_in;
+ aVec[SMDSEntity_Quad_Triangle] = nbFaces;
+ }
+ else {
+ aVec[SMDSEntity_Node] = Max ( nbNodes, 0 );
+ aVec[SMDSEntity_Triangle] = nbFaces;
+ }
+ aResMap[sm].swap(aVec);
+ }
+
+ // ----------------
+ // evaluate 3D
+ // ----------------
+ if(_isVolume) {
+ // pass 3D simple parameters to NETGEN
+ const NETGENPlugin_SimpleHypothesis_3D* simple3d =
+ dynamic_cast< const NETGENPlugin_SimpleHypothesis_3D* > ( _simpleHyp );
+ if ( simple3d ) {
+ if ( double vol = simple3d->GetMaxElementVolume() ) {
+ // max volume
+ mparams.maxh = pow( 72, 1/6. ) * pow( vol, 1/3. );
+ mparams.maxh = min( mparams.maxh, occgeo.boundingbox.Diam()/2 );
+ }
+ else {
+ // using previous length from faces
+ }
+ mparams.grading = 0.4;
+ mparams.maxh = min( mparams.maxh, fullLen/fullNbSeg * (1. + mparams.grading));
+ }
+ GProp_GProps G;
+ BRepGProp::VolumeProperties(_shape,G);
+ double aVolume = G.Mass();
+ double tetrVol = 0.1179*mparams.maxh*mparams.maxh*mparams.maxh;
+ tooManyElems = tooManyElems || ( aVolume/hugeNb > tetrVol );
+ int nbVols = tooManyElems ? hugeNb : int(aVolume/tetrVol);
+ int nb1d_in = int(( nbVols*6 - fullNbSeg ) / 6 );
+ vector<int> aVec(SMDSEntity_Last, 0 );
+ if ( tooManyElems ) // avoid FPE
+ {
+ aVec[SMDSEntity_Node] = hugeNb;
+ aVec[ mparams.secondorder > 0 ? SMDSEntity_Quad_Tetra : SMDSEntity_Tetra] = hugeNb;
+ }
+ else
+ {
+ if( mparams.secondorder > 0 ) {
+ aVec[SMDSEntity_Node] = nb1d_in/3 + 1 + nb1d_in;
+ aVec[SMDSEntity_Quad_Tetra] = nbVols;
+ }
+ else {
+ aVec[SMDSEntity_Node] = nb1d_in/3 + 1;
+ aVec[SMDSEntity_Tetra] = nbVols;
+ }
+ }
+ SMESH_subMesh *sm = _mesh->GetSubMesh(_shape);
+ aResMap[sm].swap(aVec);
+ }
+
+ return true;
+}
+
+double NETGENPlugin_Mesher::GetProgress(const SMESH_Algo* holder,
+ const int * algoProgressTic,
+ const double * algoProgress) const
+{
+ ((int&) _progressTic ) = *algoProgressTic + 1;
+
+ if ( !_occgeom ) return 0;
+
+ double progress = -1;
+ if ( !_isVolume )
+ {
+ if ( _ticTime < 0 && netgen::multithread.task[0] == 'O'/*Optimizing surface*/ )
+ {
+ ((double&) _ticTime ) = edgeFaceMeshingTime / _totalTime / _progressTic;
+ }
+ else if ( !_optimize /*&& _occgeom->fmap.Extent() > 1*/ )
+ {
+ int doneShapeIndex = -1;
+ while ( doneShapeIndex+1 < _occgeom->facemeshstatus.Size() &&
+ _occgeom->facemeshstatus[ doneShapeIndex+1 ])
+ doneShapeIndex++;
+ if ( doneShapeIndex+1 != _curShapeIndex )
+ {
+ ((int&) _curShapeIndex) = doneShapeIndex+1;
+ double doneShapeRate = _curShapeIndex / double( _occgeom->fmap.Extent() );
+ double doneTime = edgeMeshingTime + doneShapeRate * faceMeshingTime;
+ ((double&) _ticTime) = doneTime / _totalTime / _progressTic;
+ // cout << "shape " << _curShapeIndex << " _ticTime " << _ticTime
+ // << " " << doneTime / _totalTime / _progressTic << endl;
+ }
+ }
+ }
+ else if ( !_optimize && _occgeom->somap.Extent() > 1 )
+ {
+ int curShapeIndex = _curShapeIndex;
+ if ( _ngMesh->GetNE() > 0 )
+ {
+ netgen::Element el = (*_ngMesh)[netgen::ElementIndex( _ngMesh->GetNE()-1 )];
+ curShapeIndex = el.GetIndex();
+ }
+ if ( curShapeIndex != _curShapeIndex )
+ {
+ ((int&) _curShapeIndex) = curShapeIndex;
+ double doneShapeRate = _curShapeIndex / double( _occgeom->somap.Extent() );
+ double doneTime = edgeFaceMeshingTime + doneShapeRate * voluMeshingTime;
+ ((double&) _ticTime) = doneTime / _totalTime / _progressTic;
+ // cout << "shape " << _curShapeIndex << " _ticTime " << _ticTime
+ // << " " << doneTime / _totalTime / _progressTic << endl;
+ }
+ }
+ if ( _ticTime > 0 )
+ progress = Max( *algoProgressTic * _ticTime, *algoProgress );
+ if ( progress > 0 )
+ {
+ ((int&) *algoProgressTic )++;
+ ((double&) *algoProgress) = progress;
+ }
+ //cout << progress << " " << *algoProgressTic << " " << netgen::multithread.task << " "<< _ticTime << endl;
+
+ return Min( progress, 0.99 );
+}
+
+//================================================================================
+/*!
+ * \brief Remove "test.out" and "problemfaces" files in current directory
+ */
+//================================================================================
+
+void NETGENPlugin_Mesher::RemoveTmpFiles()
+{
+ bool rm = SMESH_File("test.out").remove() ;
+#ifndef WIN32
+ if (rm && netgen::testout)
+ {
+ delete netgen::testout;
+ netgen::testout = 0;
+ }
+#endif
+ SMESH_File("problemfaces").remove();
+ SMESH_File("occmesh.rep").remove();
+}
+
+//================================================================================
+/*!
+ * \brief Read mesh entities preventing successful computation from "test.out" file
+ */
+//================================================================================
+
+SMESH_ComputeErrorPtr
+NETGENPlugin_Mesher::ReadErrors(const vector<const SMDS_MeshNode* >& nodeVec)
+{
+ SMESH_ComputeErrorPtr err = SMESH_ComputeError::New
+ (COMPERR_BAD_INPUT_MESH, "Some edges multiple times in surface mesh");
+ SMESH_File file("test.out");
+ vector<int> two(2);
+ const char* badEdgeStr = " multiple times in surface mesh";
+ const int badEdgeStrLen = strlen( badEdgeStr );
+ while( !file.eof() )
+ {
+ if ( strncmp( file, "Edge ", 5 ) == 0 &&
+ file.getInts( two ) &&
+ strncmp( file, badEdgeStr, badEdgeStrLen ) == 0 &&
+ two[0] < nodeVec.size() && two[1] < nodeVec.size())
+ {
+ err->myBadElements.push_back( new SMDS_LinearEdge( nodeVec[ two[0]], nodeVec[ two[1]] ));
+ file += badEdgeStrLen;
+ }
+ else if ( strncmp( file, "Intersecting: ", 14 ) == 0 )
+ {
+// Intersecting:
+// openelement 18 with open element 126
+// 41 36 38
+// 69 70 72
+ vector<int> three1(3), three2(3);
+ file.getLine();
+ const char* pos = file;
+ bool ok = ( strncmp( file, "openelement ", 12 ) == 0 );
+ ok = ok && file.getInts( two );
+ ok = ok && file.getInts( three1 );
+ ok = ok && file.getInts( three2 );
+ for ( int i = 0; ok && i < 3; ++i )
+ ok = ( three1[i] < nodeVec.size() && nodeVec[ three1[i]]);
+ for ( int i = 0; ok && i < 3; ++i )
+ ok = ( three2[i] < nodeVec.size() && nodeVec[ three2[i]]);
+ if ( ok )
+ {
+ err->myBadElements.push_back( new SMDS_FaceOfNodes( nodeVec[ three1[0]],
+ nodeVec[ three1[1]],
+ nodeVec[ three1[2]]));
+ err->myBadElements.push_back( new SMDS_FaceOfNodes( nodeVec[ three2[0]],
+ nodeVec[ three2[1]],
+ nodeVec[ three2[2]]));
+ err->myComment = "Intersecting triangles";
+ }
+ else
+ {
+ file.setPos( pos );
+ }
+ }
+ else
+ {
+ ++file;
+ }
+ }
+ return err;
+}
+
+//================================================================================
+/*!
+ * \brief Write a python script creating an equivalent SALOME mesh.
+ * This is useful to see what mesh is passed as input for the next step of mesh
+ * generation (of mesh of higher dimension)
+ */
+//================================================================================
+
+void NETGENPlugin_Mesher::toPython( const netgen::Mesh* ngMesh,
+ const std::string& pyFile)
+{
+ ofstream outfile(pyFile.c_str(), ios::out);
+ if ( !outfile ) return;
+
+ outfile << "import SMESH" << endl
+ << "from salome.smesh import smeshBuilder" << endl
+ << "smesh = smeshBuilder.New(salome.myStudy)" << endl
+ << "mesh = smesh.Mesh()" << endl << endl;
+
+ using namespace netgen;
+ PointIndex pi;
+ for (pi = PointIndex::BASE;
+ pi < ngMesh->GetNP()+PointIndex::BASE; pi++)
+ {
+ outfile << "mesh.AddNode( ";
+ outfile << (*ngMesh)[pi](0) << ", ";
+ outfile << (*ngMesh)[pi](1) << ", ";
+ outfile << (*ngMesh)[pi](2) << ") ## "<< pi << endl;
+ }
+
+ int nbDom = ngMesh->GetNDomains();
+ for ( int i = 0; i < nbDom; ++i )
+ outfile<< "grp" << i+1 << " = mesh.CreateEmptyGroup( SMESH.FACE, 'domain"<< i+1 << "')"<< endl;
+
+ SurfaceElementIndex sei;
+ for (sei = 0; sei < ngMesh->GetNSE(); sei++)
+ {
+ outfile << "mesh.AddFace([ ";
+ Element2d sel = (*ngMesh)[sei];
+ for (int j = 0; j < sel.GetNP(); j++)
+ outfile << sel[j] << ( j+1 < sel.GetNP() ? ", " : " ])");
+ if ( sel.IsDeleted() ) outfile << " ## IsDeleted ";
+ outfile << endl;
+
+ if ((*ngMesh)[sei].GetIndex())
+ {
+ if ( int dom1 = ngMesh->GetFaceDescriptor((*ngMesh)[sei].GetIndex ()).DomainIn())
+ outfile << "grp"<< dom1 <<".Add([ " << (int)sei+1 << " ])" << endl;
+ if ( int dom2 = ngMesh->GetFaceDescriptor((*ngMesh)[sei].GetIndex ()).DomainOut())
+ outfile << "grp"<< dom2 <<".Add([ " << (int)sei+1 << " ])" << endl;
+ }
+ }
+
+ for (ElementIndex ei = 0; ei < ngMesh->GetNE(); ei++)
+ {
+ Element el = (*ngMesh)[ei];
+ outfile << "mesh.AddVolume([ ";
+ for (int j = 0; j < el.GetNP(); j++)
+ outfile << el[j] << ( j+1 < el.GetNP() ? ", " : " ])");
+ outfile << endl;
+ }
+
+ for (int i = 1; i <= ngMesh->GetNSeg(); i++)
+ {
+ const Segment & seg = ngMesh->LineSegment (i);
+ outfile << "mesh.AddEdge([ "
+ << seg[0] << ", "
+ << seg[1] << " ])" << endl;
+ }
+ cout << "Write " << pyFile << endl;
+}
+
+//================================================================================
+/*!
+ * \brief Constructor of NETGENPlugin_ngMeshInfo
+ */
+//================================================================================
+
+NETGENPlugin_ngMeshInfo::NETGENPlugin_ngMeshInfo( netgen::Mesh* ngMesh):
+ _copyOfLocalH(0)
+{
+ if ( ngMesh )
+ {
+ _nbNodes = ngMesh->GetNP();
+ _nbSegments = ngMesh->GetNSeg();
+ _nbFaces = ngMesh->GetNSE();
+ _nbVolumes = ngMesh->GetNE();
+ }
+ else
+ {
+ _nbNodes = _nbSegments = _nbFaces = _nbVolumes = 0;
+ }
+}
+
+//================================================================================
+/*!
+ * \brief Copy LocalH member from one netgen mesh to another
+ */
+//================================================================================
+
+void NETGENPlugin_ngMeshInfo::transferLocalH( netgen::Mesh* fromMesh,
+ netgen::Mesh* toMesh )
+{
+ if ( !fromMesh->LocalHFunctionGenerated() ) return;
+ if ( !toMesh->LocalHFunctionGenerated() )
+#ifdef NETGEN_V5
+ toMesh->CalcLocalH(netgen::mparam.grading);
+#else
+ toMesh->CalcLocalH();
+#endif
+
+ const size_t size = sizeof( netgen::LocalH );
+ _copyOfLocalH = new char[ size ];
+ memcpy( (void*)_copyOfLocalH, (void*)&toMesh->LocalHFunction(), size );
+ memcpy( (void*)&toMesh->LocalHFunction(), (void*)&fromMesh->LocalHFunction(), size );
+}
+
+//================================================================================
+/*!
+ * \brief Restore LocalH member of a netgen mesh
+ */
+//================================================================================
+
+void NETGENPlugin_ngMeshInfo::restoreLocalH( netgen::Mesh* toMesh )
+{
+ if ( _copyOfLocalH )
+ {
+ const size_t size = sizeof( netgen::LocalH );
+ memcpy( (void*)&toMesh->LocalHFunction(), (void*)_copyOfLocalH, size );
+ delete [] _copyOfLocalH;
+ _copyOfLocalH = 0;
+ }
+}
+
+//================================================================================
+/*!
+ * \brief Find "internal" sub-shapes
+ */
+//================================================================================
+
+NETGENPlugin_Internals::NETGENPlugin_Internals( SMESH_Mesh& mesh,
+ const TopoDS_Shape& shape,
+ bool is3D )
+ : _mesh( mesh ), _is3D( is3D )
+{
+ SMESHDS_Mesh* meshDS = mesh.GetMeshDS();
+
+ TopExp_Explorer f,e;
+ for ( f.Init( shape, TopAbs_FACE ); f.More(); f.Next() )
+ {
+ int faceID = meshDS->ShapeToIndex( f.Current() );
+
+ // find not computed internal edges
+
+ for ( e.Init( f.Current().Oriented(TopAbs_FORWARD), TopAbs_EDGE ); e.More(); e.Next() )
+ if ( e.Current().Orientation() == TopAbs_INTERNAL )
+ {
+ SMESH_subMesh* eSM = mesh.GetSubMesh( e.Current() );
+ if ( eSM->IsEmpty() )
+ {
+ _e2face.insert( make_pair( eSM->GetId(), faceID ));
+ for ( TopoDS_Iterator v(e.Current()); v.More(); v.Next() )
+ _e2face.insert( make_pair( meshDS->ShapeToIndex( v.Value() ), faceID ));
+ }
+ }
+
+ // find internal vertices in a face
+ set<int> intVV; // issue 0020850 where same vertex is twice in a face
+ for ( TopoDS_Iterator fSub( f.Current() ); fSub.More(); fSub.Next())
+ if ( fSub.Value().ShapeType() == TopAbs_VERTEX )
+ {
+ int vID = meshDS->ShapeToIndex( fSub.Value() );
+ if ( intVV.insert( vID ).second )
+ _f2v[ faceID ].push_back( vID );
+ }
+
+ if ( is3D )
+ {
+ // find internal faces and their subshapes where nodes are to be doubled
+ // to make a crack with non-sewed borders
+
+ if ( f.Current().Orientation() == TopAbs_INTERNAL )
+ {
+ _intShapes.insert( meshDS->ShapeToIndex( f.Current() ));
+
+ // egdes
+ list< TopoDS_Shape > edges;
+ for ( e.Init( f.Current(), TopAbs_EDGE ); e.More(); e.Next())
+ if ( SMESH_MesherHelper::NbAncestors( e.Current(), mesh, TopAbs_FACE ) > 1 )
+ {
+ _intShapes.insert( meshDS->ShapeToIndex( e.Current() ));
+ edges.push_back( e.Current() );
+ // find border faces
+ PShapeIteratorPtr fIt =
+ SMESH_MesherHelper::GetAncestors( edges.back(),mesh,TopAbs_FACE );
+ while ( const TopoDS_Shape* pFace = fIt->next() )
+ if ( !pFace->IsSame( f.Current() ))
+ _borderFaces.insert( meshDS->ShapeToIndex( *pFace ));
+ }
+ // vertices
+ // we consider vertex internal if it is shared by more than one internal edge
+ list< TopoDS_Shape >::iterator edge = edges.begin();
+ for ( ; edge != edges.end(); ++edge )
+ for ( TopoDS_Iterator v( *edge ); v.More(); v.Next() )
+ {
+ set<int> internalEdges;
+ PShapeIteratorPtr eIt =
+ SMESH_MesherHelper::GetAncestors( v.Value(),mesh,TopAbs_EDGE );
+ while ( const TopoDS_Shape* pEdge = eIt->next() )
+ {
+ int edgeID = meshDS->ShapeToIndex( *pEdge );
+ if ( isInternalShape( edgeID ))
+ internalEdges.insert( edgeID );
+ }
+ if ( internalEdges.size() > 1 )
+ _intShapes.insert( meshDS->ShapeToIndex( v.Value() ));
+ }
+ }
+ }
+ } // loop on geom faces
+
+ // find vertices internal in solids
+ if ( is3D )
+ {
+ for ( TopExp_Explorer so(shape, TopAbs_SOLID); so.More(); so.Next())
+ {
+ int soID = meshDS->ShapeToIndex( so.Current() );
+ for ( TopoDS_Iterator soSub( so.Current() ); soSub.More(); soSub.Next())
+ if ( soSub.Value().ShapeType() == TopAbs_VERTEX )
+ _s2v[ soID ].push_back( meshDS->ShapeToIndex( soSub.Value() ));
+ }
+ }
+}
+
+//================================================================================
+/*!
+ * \brief Find mesh faces on non-internal geom faces sharing internal edge
+ * some nodes of which are to be doubled to make the second border of the "crack"
+ */
+//================================================================================
+
+void NETGENPlugin_Internals::findBorderElements( TIDSortedElemSet & borderElems )
+{
+ if ( _intShapes.empty() ) return;
+
+ SMESH_Mesh& mesh = const_cast<SMESH_Mesh&>(_mesh);
+ SMESHDS_Mesh* meshDS = mesh.GetMeshDS();
+
+ // loop on internal geom edges
+ set<int>::const_iterator intShapeId = _intShapes.begin();
+ for ( ; intShapeId != _intShapes.end(); ++intShapeId )
+ {
+ const TopoDS_Shape& s = meshDS->IndexToShape( *intShapeId );
+ if ( s.ShapeType() != TopAbs_EDGE ) continue;
+
+ // get internal and non-internal geom faces sharing the internal edge <s>
+ int intFace = 0;
+ set<int>::iterator bordFace = _borderFaces.end();
+ PShapeIteratorPtr faces = SMESH_MesherHelper::GetAncestors( s, _mesh, TopAbs_FACE );
+ while ( const TopoDS_Shape* pFace = faces->next() )
+ {
+ int faceID = meshDS->ShapeToIndex( *pFace );
+ if ( isInternalShape( faceID ))
+ intFace = faceID;
+ else
+ bordFace = _borderFaces.insert( faceID ).first;
+ }
+ if ( bordFace == _borderFaces.end() || !intFace ) continue;
+
+ // get all links of mesh faces on internal geom face sharing nodes on edge <s>
+ set< SMESH_OrientedLink > links; //!< links of faces on internal geom face
+ list<const SMDS_MeshElement*> suspectFaces[2]; //!< mesh faces on border geom faces
+ int nbSuspectFaces = 0;
+ SMESHDS_SubMesh* intFaceSM = meshDS->MeshElements( intFace );
+ if ( !intFaceSM || intFaceSM->NbElements() == 0 ) continue;
+ SMESH_subMeshIteratorPtr smIt = mesh.GetSubMesh( s )->getDependsOnIterator(true,true);
+ while ( smIt->more() )
+ {
+ SMESHDS_SubMesh* sm = smIt->next()->GetSubMeshDS();
+ if ( !sm ) continue;
+ SMDS_NodeIteratorPtr nIt = sm->GetNodes();
+ while ( nIt->more() )
+ {
+ const SMDS_MeshNode* nOnEdge = nIt->next();
+ SMDS_ElemIteratorPtr fIt = nOnEdge->GetInverseElementIterator(SMDSAbs_Face);
+ while ( fIt->more() )
+ {
+ const SMDS_MeshElement* f = fIt->next();
+ int nbNodes = f->NbNodes() / ( f->IsQuadratic() ? 2 : 1 );
+ if ( intFaceSM->Contains( f ))
+ {
+ for ( int i = 0; i < nbNodes; ++i )
+ links.insert( SMESH_OrientedLink( f->GetNode(i), f->GetNode((i+1)%nbNodes)));
+ }
+ else
+ {
+ int nbDblNodes = 0;
+ for ( int i = 0; i < nbNodes; ++i )
+ nbDblNodes += isInternalShape( f->GetNode(i)->getshapeId() );
+ if ( nbDblNodes )
+ suspectFaces[ nbDblNodes < 2 ].push_back( f );
+ nbSuspectFaces++;
+ }
+ }
+ }
+ }
+ // suspectFaces[0] having link with same orientation as mesh faces on
+ // the internal geom face are <borderElems>. suspectFaces[1] have
+ // only one node on edge <s>, we decide on them later (at the 2nd loop)
+ // by links of <borderElems> found at the 1st and 2nd loops
+ set< SMESH_OrientedLink > borderLinks;
+ for ( int isPostponed = 0; isPostponed < 2; ++isPostponed )
+ {
+ list<const SMDS_MeshElement*>::iterator fIt = suspectFaces[isPostponed].begin();
+ for ( int nbF = 0; fIt != suspectFaces[isPostponed].end(); ++fIt, ++nbF )
+ {
+ const SMDS_MeshElement* f = *fIt;
+ bool isBorder = false, linkFound = false, borderLinkFound = false;
+ list< SMESH_OrientedLink > faceLinks;
+ int nbNodes = f->NbNodes() / ( f->IsQuadratic() ? 2 : 1 );
+ for ( int i = 0; i < nbNodes; ++i )
+ {
+ SMESH_OrientedLink link( f->GetNode(i), f->GetNode((i+1)%nbNodes));
+ faceLinks.push_back( link );
+ if ( !linkFound )
+ {
+ set< SMESH_OrientedLink >::iterator foundLink = links.find( link );
+ if ( foundLink != links.end() )
+ {
+ linkFound= true;
+ isBorder = ( foundLink->_reversed == link._reversed );
+ if ( !isBorder && !isPostponed ) break;
+ faceLinks.pop_back();
+ }
+ else if ( isPostponed && !borderLinkFound )
+ {
+ foundLink = borderLinks.find( link );
+ if ( foundLink != borderLinks.end() )
+ {
+ borderLinkFound = true;
+ isBorder = ( foundLink->_reversed != link._reversed );
+ }
+ }
+ }
+ }
+ if ( isBorder )
+ {
+ borderElems.insert( f );
+ borderLinks.insert( faceLinks.begin(), faceLinks.end() );
+ }
+ else if ( !linkFound && !borderLinkFound )
+ {
+ suspectFaces[1].push_back( f );
+ if ( nbF > 2 * nbSuspectFaces )
+ break; // dead loop protection
+ }
+ }
+ }
+ }
+}
+
+//================================================================================
+/*!
+ * \brief put internal shapes in maps and fill in submeshes to precompute
+ */
+//================================================================================
+
+void NETGENPlugin_Internals::getInternalEdges( TopTools_IndexedMapOfShape& fmap,
+ TopTools_IndexedMapOfShape& emap,
+ TopTools_IndexedMapOfShape& vmap,
+ list< SMESH_subMesh* > smToPrecompute[])
+{
+ if ( !hasInternalEdges() ) return;
+ map<int,int>::const_iterator ev_face = _e2face.begin();
+ for ( ; ev_face != _e2face.end(); ++ev_face )
+ {
+ const TopoDS_Shape& ev = _mesh.GetMeshDS()->IndexToShape( ev_face->first );
+ const TopoDS_Shape& face = _mesh.GetMeshDS()->IndexToShape( ev_face->second );
+
+ ( ev.ShapeType() == TopAbs_EDGE ? emap : vmap ).Add( ev );
+ fmap.Add( face );
+ //cout<<"INTERNAL EDGE or VERTEX "<<ev_face->first<<" on face "<<ev_face->second<<endl;
+
+ smToPrecompute[ MeshDim_1D ].push_back( _mesh.GetSubMeshContaining( ev_face->first ));
+ }
+}
+
+//================================================================================
+/*!
+ * \brief return shapes and submeshes to be meshed and already meshed boundary submeshes
+ */
+//================================================================================
+
+void NETGENPlugin_Internals::getInternalFaces( TopTools_IndexedMapOfShape& fmap,
+ TopTools_IndexedMapOfShape& emap,
+ list< SMESH_subMesh* >& intFaceSM,
+ list< SMESH_subMesh* >& boundarySM)
+{
+ if ( !hasInternalFaces() ) return;
+
+ // <fmap> and <emap> are for not yet meshed shapes
+ // <intFaceSM> is for submeshes of faces
+ // <boundarySM> is for meshed edges and vertices
+
+ intFaceSM.clear();
+ boundarySM.clear();
+
+ set<int> shapeIDs ( _intShapes );
+ if ( !_borderFaces.empty() )
+ shapeIDs.insert( _borderFaces.begin(), _borderFaces.end() );
+
+ set<int>::const_iterator intS = shapeIDs.begin();
+ for ( ; intS != shapeIDs.end(); ++intS )
+ {
+ SMESH_subMesh* sm = _mesh.GetSubMeshContaining( *intS );
+
+ if ( sm->GetSubShape().ShapeType() != TopAbs_FACE ) continue;
+
+ intFaceSM.push_back( sm );
+
+ // add submeshes of not computed internal faces
+ if ( !sm->IsEmpty() ) continue;
+
+ SMESH_subMeshIteratorPtr smIt = sm->getDependsOnIterator(true,true);
+ while ( smIt->more() )
+ {
+ sm = smIt->next();
+ const TopoDS_Shape& s = sm->GetSubShape();
+
+ if ( sm->IsEmpty() )
+ {
+ // not yet meshed
+ switch ( s.ShapeType() ) {
+ case TopAbs_FACE: fmap.Add ( s ); break;
+ case TopAbs_EDGE: emap.Add ( s ); break;
+ default:;
+ }
+ }
+ else
+ {
+ if ( s.ShapeType() != TopAbs_FACE )
+ boundarySM.push_back( sm );
+ }
+ }
+ }
+}
+
+//================================================================================
+/*!
+ * \brief Return true if given shape is to be precomputed in order to be correctly
+ * added to netgen mesh
+ */
+//================================================================================
+
+bool NETGENPlugin_Internals::isShapeToPrecompute(const TopoDS_Shape& s)
+{
+ int shapeID = _mesh.GetMeshDS()->ShapeToIndex( s );
+ switch ( s.ShapeType() ) {
+ case TopAbs_FACE : break; //return isInternalShape( shapeID ) || isBorderFace( shapeID );
+ case TopAbs_EDGE : return isInternalEdge( shapeID );
+ case TopAbs_VERTEX: break;
+ default:;
+ }
+ return false;
+}
+
+//================================================================================
+/*!
+ * \brief Return SMESH
+ */
+//================================================================================
+
+SMESH_Mesh& NETGENPlugin_Internals::getMesh() const
+{
+ return const_cast<SMESH_Mesh&>( _mesh );
+}
+
+//================================================================================
+/*!
+ * \brief Initialize netgen library
+ */
+//================================================================================
+
+NETGENPlugin_NetgenLibWrapper::NETGENPlugin_NetgenLibWrapper()
+{
+ Ng_Init();
+
+ _isComputeOk = false;
+ _coutBuffer = NULL;
+ if ( !getenv( "KEEP_NETGEN_OUTPUT" ))
+ {
+ // redirect all netgen output (mycout,myerr,cout) to _outputFileName
+ _outputFileName = getOutputFileName();
+ netgen::mycout = new ofstream ( _outputFileName.c_str() );
+ netgen::myerr = netgen::mycout;
+ _coutBuffer = std::cout.rdbuf();
+#ifdef _DEBUG_
+ cout << "NOTE: netgen output is redirected to file " << _outputFileName << endl;
+#else
+ std::cout.rdbuf( netgen::mycout->rdbuf() );
+#endif
+ }
+
+ _ngMesh = Ng_NewMesh();
+}
+
+//================================================================================
+/*!
+ * \brief Finish using netgen library
+ */
+//================================================================================
+
+NETGENPlugin_NetgenLibWrapper::~NETGENPlugin_NetgenLibWrapper()
+{
+ Ng_DeleteMesh( _ngMesh );
+ Ng_Exit();
+ NETGENPlugin_Mesher::RemoveTmpFiles();
+ if ( _coutBuffer )
+ std::cout.rdbuf( _coutBuffer );
+#ifdef _DEBUG_
+ if( _isComputeOk )
+#endif
+ removeOutputFile();
+}
+
+//================================================================================
+/*!
+ * \brief Set netgen mesh to delete at destruction
+ */
+//================================================================================
+
+void NETGENPlugin_NetgenLibWrapper::setMesh( Ng_Mesh* mesh )
+{
+ if ( _ngMesh )
+ Ng_DeleteMesh( _ngMesh );
+ _ngMesh = mesh;
+}
+
+//================================================================================
+/*!
+ * \brief Return a unique file name
+ */
+//================================================================================
+
+std::string NETGENPlugin_NetgenLibWrapper::getOutputFileName()
+{
+ std::string aTmpDir = SALOMEDS_Tool::GetTmpDir();
+
+ TCollection_AsciiString aGenericName = (char*)aTmpDir.c_str();
+ aGenericName += "NETGEN_";
+#ifndef WIN32
+ aGenericName += getpid();
+#else
+ aGenericName += _getpid();
+#endif
+ aGenericName += "_";
+ aGenericName += Abs((Standard_Integer)(long) aGenericName.ToCString());
+ aGenericName += ".out";
+
+ return aGenericName.ToCString();
+}
+
+//================================================================================
+/*!
+ * \brief Remove file with netgen output
+ */
+//================================================================================
+
+void NETGENPlugin_NetgenLibWrapper::removeOutputFile()
+{
+ if ( !_outputFileName.empty() )
+ {
+ if ( netgen::mycout )
+ {
+ delete netgen::mycout;
+ netgen::mycout = 0;
+ netgen::myerr = 0;
+ }
+ string tmpDir = SALOMEDS_Tool::GetDirFromPath ( _outputFileName );
+ string aFileName = SALOMEDS_Tool::GetNameFromPath( _outputFileName ) + ".out";
+ SALOMEDS::ListOfFileNames_var aFiles = new SALOMEDS::ListOfFileNames;
+ aFiles->length(1);
+ aFiles[0] = aFileName.c_str();
+
+ SALOMEDS_Tool::RemoveTemporaryFiles( tmpDir.c_str(), aFiles.in(), true );
+ }
}
