4629 lines
163 KiB
C++
4629 lines
163 KiB
C++
// Copyright (C) 2007-2022 CEA/DEN, EDF R&D, OPEN CASCADE
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//
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// Copyright (C) 2003-2007 OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
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// CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 2.1 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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//
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// See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
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//
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// NETGENPlugin : C++ implementation
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// File : NETGENPlugin_Mesher.cxx
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// Author : Michael Sazonov (OCN)
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// Date : 31/03/2006
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// Project : SALOME
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//=============================================================================
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#include "NETGENPlugin_Mesher.hxx"
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#include "NETGENPlugin_Hypothesis_2D.hxx"
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#include "NETGENPlugin_SimpleHypothesis_3D.hxx"
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#include <SMDS_FaceOfNodes.hxx>
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#include <SMDS_LinearEdge.hxx>
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#include <SMDS_MeshElement.hxx>
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#include <SMDS_MeshNode.hxx>
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#include <SMESHDS_Mesh.hxx>
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#include <SMESH_Block.hxx>
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#include <SMESH_Comment.hxx>
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#include <SMESH_ComputeError.hxx>
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#include <SMESH_ControlPnt.hxx>
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#include <SMESH_File.hxx>
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#include <SMESH_Gen_i.hxx>
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#include <SMESH_Mesh.hxx>
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#include <SMESH_MesherHelper.hxx>
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#include <SMESH_subMesh.hxx>
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#include <StdMeshers_QuadToTriaAdaptor.hxx>
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#include <StdMeshers_ViscousLayers2D.hxx>
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#include <SALOMEDS_Tool.hxx>
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#include <utilities.h>
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#include <BRepAdaptor_Surface.hxx>
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#include <BRepBuilderAPI_Copy.hxx>
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#include <BRepLProp_SLProps.hxx>
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#include <BRepMesh_IncrementalMesh.hxx>
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#include <BRep_Builder.hxx>
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#include <BRep_Tool.hxx>
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#include <Bnd_B3d.hxx>
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#include <GeomLib_IsPlanarSurface.hxx>
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#include <NCollection_Map.hxx>
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#include <Poly_Triangulation.hxx>
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#include <Standard_ErrorHandler.hxx>
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#include <Standard_ProgramError.hxx>
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#include <TColStd_MapOfInteger.hxx>
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#include <TopExp.hxx>
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#include <TopExp_Explorer.hxx>
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#include <TopLoc_Location.hxx>
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#include <TopTools_DataMapIteratorOfDataMapOfShapeInteger.hxx>
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#include <TopTools_DataMapIteratorOfDataMapOfShapeShape.hxx>
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#include <TopTools_DataMapOfShapeInteger.hxx>
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#include <TopTools_DataMapOfShapeShape.hxx>
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#include <TopTools_MapOfShape.hxx>
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#include <TopoDS.hxx>
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#include <TopoDS_Compound.hxx>
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// Netgen include files
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#ifndef OCCGEOMETRY
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#define OCCGEOMETRY
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#endif
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#include <occgeom.hpp>
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#include <meshing.hpp>
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//#include <ngexception.hpp>
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namespace netgen {
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NETGENPLUGIN_DLL_HEADER
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extern MeshingParameters mparam;
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NETGENPLUGIN_DLL_HEADER
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extern volatile multithreadt multithread;
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NETGENPLUGIN_DLL_HEADER
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extern bool merge_solids;
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// values used for occgeo.facemeshstatus
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enum EFaceMeshStatus { FACE_NOT_TREATED = 0,
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FACE_FAILED = -1,
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FACE_MESHED_OK = 1,
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};
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}
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#include <vector>
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#include <limits>
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#ifdef WIN32
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#include <process.h>
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#endif
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using namespace nglib;
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using namespace std;
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#ifdef _DEBUG_
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#define nodeVec_ACCESS(index) ((SMDS_MeshNode*) nodeVec.at((index)))
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#else
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#define nodeVec_ACCESS(index) ((SMDS_MeshNode*) nodeVec[index])
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#endif
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#define NGPOINT_COORDS(p) p(0),p(1),p(2)
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#ifdef _DEBUG_
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// dump elements added to ng mesh
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//#define DUMP_SEGMENTS
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//#define DUMP_TRIANGLES
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//#define DUMP_TRIANGLES_SCRIPT "/tmp/trias.py" //!< debug AddIntVerticesInSolids()
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#endif
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TopTools_IndexedMapOfShape ShapesWithLocalSize;
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std::map<int,double> VertexId2LocalSize;
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std::map<int,double> EdgeId2LocalSize;
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std::map<int,double> FaceId2LocalSize;
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std::map<int,double> SolidId2LocalSize;
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std::vector<SMESHUtils::ControlPnt> ControlPoints;
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std::set<int> ShapesWithControlPoints; // <-- allows calling SetLocalSize() several times w/o recomputing ControlPoints
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namespace
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{
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inline void NOOP_Deleter(void *) { ; }
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//=============================================================================
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/*!
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* Link - a pair of integer numbers
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*/
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//=============================================================================
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struct Link
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{
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int n1, n2;
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Link(int _n1, int _n2) : n1(_n1), n2(_n2) {}
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Link() : n1(0), n2(0) {}
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bool Contains( int n ) const { return n == n1 || n == n2; }
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bool IsConnected( const Link& other ) const
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{
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return (( Contains( other.n1 ) || Contains( other.n2 )) && ( this != &other ));
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}
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static int HashCode(const Link& aLink, int aLimit)
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{
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return ::HashCode(aLink.n1 + aLink.n2, aLimit);
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}
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static Standard_Boolean IsEqual(const Link& aLink1, const Link& aLink2)
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{
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return (( aLink1.n1 == aLink2.n1 && aLink1.n2 == aLink2.n2 ) ||
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( aLink1.n1 == aLink2.n2 && aLink1.n2 == aLink2.n1 ));
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}
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};
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typedef NCollection_Map<Link,Link> TLinkMap;
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//================================================================================
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/*!
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* \brief return id of netgen point corresponding to SMDS node
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*/
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//================================================================================
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typedef map< const SMDS_MeshNode*, int > TNode2IdMap;
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int ngNodeId( const SMDS_MeshNode* node,
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netgen::Mesh& ngMesh,
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TNode2IdMap& nodeNgIdMap)
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{
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int newNgId = ngMesh.GetNP() + 1;
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TNode2IdMap::iterator node_id = nodeNgIdMap.insert( make_pair( node, newNgId )).first;
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if ( node_id->second == newNgId)
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{
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#if defined(DUMP_SEGMENTS) || defined(DUMP_TRIANGLES)
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cout << "Ng " << newNgId << " - " << node;
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#endif
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netgen::MeshPoint p( netgen::Point<3> (node->X(), node->Y(), node->Z()) );
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ngMesh.AddPoint( p );
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}
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return node_id->second;
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}
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//================================================================================
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/*!
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* \brief Return computed EDGEs connected to the given one
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*/
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//================================================================================
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list< TopoDS_Edge > getConnectedEdges( const TopoDS_Edge& edge,
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const TopoDS_Face& face,
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const set< SMESH_subMesh* > & /*computedSM*/,
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const SMESH_MesherHelper& helper,
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map< SMESH_subMesh*, set< int > >& addedEdgeSM2Faces)
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{
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// get ordered EDGEs
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list< TopoDS_Edge > edges;
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list< int > nbEdgesInWire;
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/*int nbWires =*/ SMESH_Block::GetOrderedEdges( face, edges, nbEdgesInWire);
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// find <edge> within <edges>
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list< TopoDS_Edge >::iterator eItFwd = edges.begin();
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for ( ; eItFwd != edges.end(); ++eItFwd )
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if ( edge.IsSame( *eItFwd ))
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break;
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if ( eItFwd == edges.end()) return list< TopoDS_Edge>();
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if ( eItFwd->Orientation() >= TopAbs_INTERNAL )
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{
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// connected INTERNAL edges returned from GetOrderedEdges() are wrongly oriented
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// so treat each INTERNAL edge separately
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TopoDS_Edge e = *eItFwd;
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edges.clear();
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edges.push_back( e );
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return edges;
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}
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// get all computed EDGEs connected to <edge>
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list< TopoDS_Edge >::iterator eItBack = eItFwd, ePrev;
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TopoDS_Vertex vCommon;
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TopTools_MapOfShape eAdded; // map used not to add a seam edge twice to <edges>
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eAdded.Add( edge );
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// put edges before <edge> to <edges> back
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while ( edges.begin() != eItFwd )
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edges.splice( edges.end(), edges, edges.begin() );
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// search forward
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ePrev = eItFwd;
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while ( ++eItFwd != edges.end() )
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{
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SMESH_subMesh* sm = helper.GetMesh()->GetSubMesh( *eItFwd );
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bool connected = TopExp::CommonVertex( *ePrev, *eItFwd, vCommon );
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bool computed = !sm->IsEmpty();
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bool added = addedEdgeSM2Faces[ sm ].count( helper.GetSubShapeID() );
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bool doubled = !eAdded.Add( *eItFwd );
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bool orientOK = (( ePrev ->Orientation() < TopAbs_INTERNAL ) ==
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( eItFwd->Orientation() < TopAbs_INTERNAL ) );
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if ( !connected || !computed || !orientOK || added || doubled )
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{
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// stop advancement; move edges from tail to head
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while ( edges.back() != *ePrev )
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edges.splice( edges.begin(), edges, --edges.end() );
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break;
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}
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ePrev = eItFwd;
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}
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// search backward
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while ( eItBack != edges.begin() )
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{
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ePrev = eItBack;
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--eItBack;
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SMESH_subMesh* sm = helper.GetMesh()->GetSubMesh( *eItBack );
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bool connected = TopExp::CommonVertex( *ePrev, *eItBack, vCommon );
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bool computed = !sm->IsEmpty();
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bool added = addedEdgeSM2Faces[ sm ].count( helper.GetSubShapeID() );
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bool doubled = !eAdded.Add( *eItBack );
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bool orientOK = (( ePrev ->Orientation() < TopAbs_INTERNAL ) ==
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( eItBack->Orientation() < TopAbs_INTERNAL ) );
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if ( !connected || !computed || !orientOK || added || doubled)
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{
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// stop advancement
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edges.erase( edges.begin(), ePrev );
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break;
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}
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}
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if ( edges.front() != edges.back() )
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{
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// assure that the 1st vertex is meshed
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TopoDS_Edge eLast = edges.back();
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while ( !SMESH_Algo::VertexNode( SMESH_MesherHelper::IthVertex( 0, edges.front()), helper.GetMeshDS())
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&&
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edges.front() != eLast )
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edges.splice( edges.end(), edges, edges.begin() );
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}
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return edges;
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}
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//================================================================================
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/*!
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* \brief Make triangulation of a shape precise enough
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*/
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//================================================================================
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void updateTriangulation( const TopoDS_Shape& shape )
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{
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// static set< Poly_Triangulation* > updated;
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// TopLoc_Location loc;
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// TopExp_Explorer fExp( shape, TopAbs_FACE );
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// for ( ; fExp.More(); fExp.Next() )
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// {
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// Handle(Poly_Triangulation) triangulation =
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// BRep_Tool::Triangulation ( TopoDS::Face( fExp.Current() ), loc);
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// if ( triangulation.IsNull() ||
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// updated.insert( triangulation.operator->() ).second )
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// {
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// BRepTools::Clean (shape);
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try {
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OCC_CATCH_SIGNALS;
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BRepMesh_IncrementalMesh e(shape, 0.01, true);
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}
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catch (Standard_Failure&)
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{
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}
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// updated.erase( triangulation.operator->() );
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// triangulation = BRep_Tool::Triangulation ( TopoDS::Face( fExp.Current() ), loc);
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// updated.insert( triangulation.operator->() );
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// }
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// }
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}
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//================================================================================
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/*!
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* \brief Returns a medium node either existing in SMESH of created by NETGEN
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* \param [in] corner1 - corner node 1
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* \param [in] corner2 - corner node 2
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* \param [in] defaultMedium - the node created by NETGEN
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* \param [in] helper - holder of medium nodes existing in SMESH
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* \return const SMDS_MeshNode* - the result node
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*/
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//================================================================================
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const SMDS_MeshNode* mediumNode( const SMDS_MeshNode* corner1,
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const SMDS_MeshNode* corner2,
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const SMDS_MeshNode* defaultMedium,
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const SMESH_MesherHelper* helper)
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{
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if ( helper )
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{
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TLinkNodeMap::const_iterator l2n =
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helper->GetTLinkNodeMap().find( SMESH_TLink( corner1, corner2 ));
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if ( l2n != helper->GetTLinkNodeMap().end() )
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defaultMedium = l2n->second;
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}
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return defaultMedium;
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}
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//================================================================================
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/*!
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* \brief Assure that mesh on given shapes is quadratic
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*/
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//================================================================================
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// void makeQuadratic( const TopTools_IndexedMapOfShape& shapes,
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// SMESH_Mesh* mesh )
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// {
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// for ( int i = 1; i <= shapes.Extent(); ++i )
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// {
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// SMESHDS_SubMesh* smDS = mesh->GetMeshDS()->MeshElements( shapes(i) );
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// if ( !smDS ) continue;
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// SMDS_ElemIteratorPtr elemIt = smDS->GetElements();
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// if ( !elemIt->more() ) continue;
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// const SMDS_MeshElement* e = elemIt->next();
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// if ( !e || e->IsQuadratic() )
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// continue;
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// TIDSortedElemSet elems;
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// elems.insert( e );
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// while ( elemIt->more() )
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// elems.insert( elems.end(), elemIt->next() );
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// SMESH_MeshEditor( mesh ).ConvertToQuadratic( /*3d=*/false, elems, /*biQuad=*/false );
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// }
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// }
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//================================================================================
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/*!
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* \brief Restrict size of elements on the given edge
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*/
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//================================================================================
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void setLocalSize(const TopoDS_Edge& edge,
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double size,
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netgen::Mesh& mesh,
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const bool overrideMinH = true)
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{
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if ( size <= std::numeric_limits<double>::min() )
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return;
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Standard_Real u1, u2;
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Handle(Geom_Curve) curve = BRep_Tool::Curve(edge, u1, u2);
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if ( curve.IsNull() )
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{
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TopoDS_Iterator vIt( edge );
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if ( !vIt.More() ) return;
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gp_Pnt p = BRep_Tool::Pnt( TopoDS::Vertex( vIt.Value() ));
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NETGENPlugin_Mesher::RestrictLocalSize( mesh, p.XYZ(), size, overrideMinH );
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}
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else
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{
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const int nb = (int)( 1.5 * SMESH_Algo::EdgeLength( edge ) / size );
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Standard_Real delta = (u2-u1)/nb;
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for(int i=0; i<nb; i++)
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{
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Standard_Real u = u1 + delta*i;
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gp_Pnt p = curve->Value(u);
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NETGENPlugin_Mesher::RestrictLocalSize( mesh, p.XYZ(), size, overrideMinH );
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netgen::Point3d pi(p.X(), p.Y(), p.Z());
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double resultSize = mesh.GetH(pi);
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if ( resultSize - size > 0.1*size )
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// netgen does restriction iff oldH/newH > 1.2 (localh.cpp:136)
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NETGENPlugin_Mesher::RestrictLocalSize( mesh, p.XYZ(), resultSize/1.201, overrideMinH );
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}
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}
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}
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//================================================================================
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/*!
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* \brief Return triangle size for a given chordalError and radius of curvature
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*/
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//================================================================================
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double elemSizeForChordalError( double chordalError, double radius )
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{
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if ( 2 * radius < chordalError )
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return 1.5 * radius;
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return Sqrt( 3 ) * Sqrt( chordalError * ( 2 * radius - chordalError ));
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}
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//=============================================================================
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/*!
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*
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*/
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//=============================================================================
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void setLocalSize(const TopoDS_Shape& GeomShape, double LocalSize)
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{
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if ( GeomShape.IsNull() ) return;
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TopAbs_ShapeEnum GeomType = GeomShape.ShapeType();
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if (GeomType == TopAbs_COMPOUND) {
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for (TopoDS_Iterator it (GeomShape); it.More(); it.Next()) {
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setLocalSize(it.Value(), LocalSize);
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}
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return;
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}
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int key;
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if (! ShapesWithLocalSize.Contains(GeomShape))
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key = ShapesWithLocalSize.Add(GeomShape);
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else
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key = ShapesWithLocalSize.FindIndex(GeomShape);
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if (GeomType == TopAbs_VERTEX) {
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VertexId2LocalSize[key] = LocalSize;
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} else if (GeomType == TopAbs_EDGE) {
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EdgeId2LocalSize[key] = LocalSize;
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} else if (GeomType == TopAbs_FACE) {
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FaceId2LocalSize[key] = LocalSize;
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} else if (GeomType == TopAbs_SOLID) {
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SolidId2LocalSize[key] = LocalSize;
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}
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return;
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}
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//================================================================================
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/*!
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* \brief Return faceNgID or faceNgID-1 depending on side the given proxy face lies
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* \param [in] f - proxy face
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* \param [in] solidSMDSIDs - IDs of SOLIDs sharing the FACE on which face lies
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* \param [in] faceNgID - NETGEN ID of the FACE
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* \return int - NETGEN ID of the FACE
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*/
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//================================================================================
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int getFaceNgID( const SMDS_MeshElement* face,
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const int * solidSMDSIDs,
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const int faceNgID )
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{
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for ( int i = 0; i < 3; ++i )
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{
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const SMDS_MeshNode* n = face->GetNode( i );
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const int shapeID = n->GetShapeID();
|
|
if ( shapeID == solidSMDSIDs[0] )
|
|
return faceNgID - 1;
|
|
if ( shapeID == solidSMDSIDs[1] )
|
|
return faceNgID;
|
|
}
|
|
std::vector<const SMDS_MeshNode*> fNodes( face->begin_nodes(), face->end_nodes() );
|
|
std::vector<const SMDS_MeshElement*> vols;
|
|
if ( SMDS_Mesh::GetElementsByNodes( fNodes, vols, SMDSAbs_Volume ))
|
|
for ( size_t i = 0; i < vols.size(); ++i )
|
|
{
|
|
const int shapeID = vols[i]->GetShapeID();
|
|
if ( shapeID == solidSMDSIDs[0] )
|
|
return faceNgID - 1;
|
|
if ( shapeID == solidSMDSIDs[1] )
|
|
return faceNgID;
|
|
}
|
|
return faceNgID;
|
|
}
|
|
|
|
} // namespace
|
|
|
|
//=============================================================================
|
|
/*!
|
|
*
|
|
*/
|
|
//=============================================================================
|
|
|
|
NETGENPlugin_Mesher::NETGENPlugin_Mesher (SMESH_Mesh* mesh,
|
|
const TopoDS_Shape& aShape,
|
|
const bool isVolume)
|
|
: _mesh (mesh),
|
|
_shape (aShape),
|
|
_isVolume(isVolume),
|
|
_optimize(true),
|
|
_fineness(NETGENPlugin_Hypothesis::GetDefaultFineness()),
|
|
_isViscousLayers2D(false),
|
|
_chordalError(-1), // means disabled
|
|
_ngMesh(NULL),
|
|
_occgeom(NULL),
|
|
_curShapeIndex(-1),
|
|
_progressTic(1),
|
|
_totalTime(1.0),
|
|
_simpleHyp(NULL),
|
|
_viscousLayersHyp(NULL),
|
|
_ptrToMe(NULL)
|
|
{
|
|
SetDefaultParameters();
|
|
ShapesWithLocalSize.Clear();
|
|
VertexId2LocalSize.clear();
|
|
EdgeId2LocalSize.clear();
|
|
FaceId2LocalSize.clear();
|
|
SolidId2LocalSize.clear();
|
|
ControlPoints.clear();
|
|
ShapesWithControlPoints.clear();
|
|
}
|
|
|
|
//================================================================================
|
|
/*!
|
|
* Destructor
|
|
*/
|
|
//================================================================================
|
|
|
|
NETGENPlugin_Mesher::~NETGENPlugin_Mesher()
|
|
{
|
|
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;
|
|
mparams = netgen::MeshingParameters();
|
|
// maximal mesh edge size
|
|
mparams.maxh = 0;//NETGENPlugin_Hypothesis::GetDefaultMaxSize();
|
|
mparams.minh = 0;
|
|
// minimal number of segments per edge
|
|
mparams.segmentsperedge = NETGENPlugin_Hypothesis::GetDefaultNbSegPerEdge();
|
|
// rate of growth of size between elements
|
|
mparams.grading = NETGENPlugin_Hypothesis::GetDefaultGrowthRate();
|
|
// safety factor for curvatures (elements per radius)
|
|
mparams.curvaturesafety = NETGENPlugin_Hypothesis::GetDefaultNbSegPerRadius();
|
|
// create elements of second order
|
|
mparams.secondorder = NETGENPlugin_Hypothesis::GetDefaultSecondOrder();
|
|
// quad-dominated surface meshing
|
|
if (_isVolume)
|
|
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();
|
|
|
|
#ifdef NETGEN_V6
|
|
|
|
mparams.nthreads = NETGENPlugin_Hypothesis::GetDefaultNbThreads();
|
|
|
|
if ( getenv( "SALOME_NETGEN_DISABLE_MULTITHREADING" ))
|
|
{
|
|
mparams.nthreads = 1;
|
|
mparams.parallel_meshing = false;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
//=============================================================================
|
|
/*!
|
|
* Pass parameters to NETGEN
|
|
*/
|
|
//=============================================================================
|
|
void NETGENPlugin_Mesher::SetParameters(const NETGENPlugin_Hypothesis* hyp)
|
|
{
|
|
if (hyp)
|
|
{
|
|
netgen::MeshingParameters& mparams = netgen::mparam;
|
|
// Initialize global NETGEN parameters:
|
|
// maximal mesh segment size
|
|
mparams.maxh = hyp->GetMaxSize();
|
|
// maximal mesh element linear size
|
|
mparams.minh = hyp->GetMinSize();
|
|
// minimal number of segments per edge
|
|
mparams.segmentsperedge = hyp->GetNbSegPerEdge();
|
|
// rate of growth of size between elements
|
|
mparams.grading = hyp->GetGrowthRate();
|
|
// safety factor for curvatures (elements per radius)
|
|
mparams.curvaturesafety = hyp->GetNbSegPerRadius();
|
|
// create elements of second order
|
|
mparams.secondorder = hyp->GetSecondOrder() ? 1 : 0;
|
|
// quad-dominated surface meshing
|
|
mparams.quad = hyp->GetQuadAllowed() ? 1 : 0;
|
|
_optimize = hyp->GetOptimize();
|
|
_fineness = hyp->GetFineness();
|
|
mparams.uselocalh = hyp->GetSurfaceCurvature();
|
|
netgen::merge_solids = hyp->GetFuseEdges();
|
|
_chordalError = hyp->GetChordalErrorEnabled() ? hyp->GetChordalError() : -1.;
|
|
mparams.optsteps2d = _optimize ? hyp->GetNbSurfOptSteps() : 0;
|
|
mparams.optsteps3d = _optimize ? hyp->GetNbVolOptSteps() : 0;
|
|
mparams.elsizeweight = hyp->GetElemSizeWeight();
|
|
mparams.opterrpow = hyp->GetWorstElemMeasure();
|
|
mparams.delaunay = hyp->GetUseDelauney();
|
|
mparams.checkoverlap = hyp->GetCheckOverlapping();
|
|
mparams.checkchartboundary = hyp->GetCheckChartBoundary();
|
|
_simpleHyp = NULL;
|
|
// mesh size file
|
|
#ifdef NETGEN_V6
|
|
// std::string
|
|
mparams.meshsizefilename = hyp->GetMeshSizeFile();
|
|
mparams.nthreads = hyp->GetNbThreads();
|
|
#else
|
|
// const char*
|
|
mparams.meshsizefilename= hyp->GetMeshSizeFile().empty() ? 0 : hyp->GetMeshSizeFile().c_str();
|
|
#endif
|
|
const NETGENPlugin_Hypothesis::TLocalSize& localSizes = hyp->GetLocalSizesAndEntries();
|
|
if ( !localSizes.empty() )
|
|
{
|
|
SMESH_Gen_i* smeshGen_i = SMESH_Gen_i::GetSMESHGen();
|
|
NETGENPlugin_Hypothesis::TLocalSize::const_iterator it = localSizes.begin();
|
|
for ( ; it != localSizes.end() ; it++)
|
|
{
|
|
std::string entry = (*it).first;
|
|
double val = (*it).second;
|
|
// --
|
|
GEOM::GEOM_Object_var aGeomObj;
|
|
SALOMEDS::SObject_var aSObj = SMESH_Gen_i::GetSMESHGen()->getStudyServant()->FindObjectID( entry.c_str() );
|
|
if ( !aSObj->_is_nil() ) {
|
|
CORBA::Object_var obj = aSObj->GetObject();
|
|
aGeomObj = GEOM::GEOM_Object::_narrow(obj);
|
|
aSObj->UnRegister();
|
|
}
|
|
TopoDS_Shape S = smeshGen_i->GeomObjectToShape( aGeomObj.in() );
|
|
setLocalSize(S, val);
|
|
}
|
|
}
|
|
}
|
|
|
|
#ifdef NETGEN_V6
|
|
|
|
netgen::mparam.closeedgefac = 2;
|
|
|
|
#endif
|
|
}
|
|
|
|
//=============================================================================
|
|
/*!
|
|
* Pass simple parameters to NETGEN
|
|
*/
|
|
//=============================================================================
|
|
|
|
void NETGENPlugin_Mesher::SetParameters(const NETGENPlugin_SimpleHypothesis_2D* hyp)
|
|
{
|
|
_simpleHyp = hyp;
|
|
if ( _simpleHyp )
|
|
SetDefaultParameters();
|
|
}
|
|
|
|
//================================================================================
|
|
/*!
|
|
* \brief Store a Viscous Layers hypothesis
|
|
*/
|
|
//================================================================================
|
|
|
|
void NETGENPlugin_Mesher::SetParameters(const StdMeshers_ViscousLayers* hyp )
|
|
{
|
|
_viscousLayersHyp = hyp;
|
|
}
|
|
|
|
//================================================================================
|
|
/*!
|
|
* \brief Set local size on shapes defined by SetParameters()
|
|
*/
|
|
//================================================================================
|
|
|
|
void NETGENPlugin_Mesher::SetLocalSize( netgen::OCCGeometry& occgeo,
|
|
netgen::Mesh& ngMesh)
|
|
{
|
|
// edges
|
|
std::map<int,double>::const_iterator it;
|
|
for( it=EdgeId2LocalSize.begin(); it!=EdgeId2LocalSize.end(); it++)
|
|
{
|
|
int key = (*it).first;
|
|
double hi = (*it).second;
|
|
const TopoDS_Shape& shape = ShapesWithLocalSize.FindKey(key);
|
|
setLocalSize( TopoDS::Edge(shape), hi, ngMesh );
|
|
}
|
|
// vertices
|
|
for(it=VertexId2LocalSize.begin(); it!=VertexId2LocalSize.end(); it++)
|
|
{
|
|
int key = (*it).first;
|
|
double hi = (*it).second;
|
|
const TopoDS_Shape& shape = ShapesWithLocalSize.FindKey(key);
|
|
gp_Pnt p = BRep_Tool::Pnt( TopoDS::Vertex(shape) );
|
|
NETGENPlugin_Mesher::RestrictLocalSize( ngMesh, p.XYZ(), hi );
|
|
}
|
|
// faces
|
|
for(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);
|
|
if ( faceNgID >= 1 )
|
|
{
|
|
#ifdef NETGEN_V6
|
|
occgeo.SetFaceMaxH(faceNgID-1, val, netgen::mparam);
|
|
#else
|
|
occgeo.SetFaceMaxH(faceNgID, val);
|
|
#endif
|
|
for ( TopExp_Explorer edgeExp( shape, TopAbs_EDGE ); edgeExp.More(); edgeExp.Next() )
|
|
setLocalSize( TopoDS::Edge( edgeExp.Current() ), val, ngMesh );
|
|
}
|
|
else if ( !ShapesWithControlPoints.count( key ))
|
|
{
|
|
SMESHUtils::createPointsSampleFromFace( TopoDS::Face( shape ), val, ControlPoints );
|
|
ShapesWithControlPoints.insert( key );
|
|
}
|
|
}
|
|
//solids
|
|
for(it=SolidId2LocalSize.begin(); it!=SolidId2LocalSize.end(); it++)
|
|
{
|
|
int key = (*it).first;
|
|
double val = (*it).second;
|
|
if ( !ShapesWithControlPoints.count( key ))
|
|
{
|
|
const TopoDS_Shape& shape = ShapesWithLocalSize.FindKey(key);
|
|
SMESHUtils::createPointsSampleFromSolid( TopoDS::Solid( shape ), val, ControlPoints );
|
|
ShapesWithControlPoints.insert( key );
|
|
}
|
|
}
|
|
|
|
if ( !ControlPoints.empty() )
|
|
{
|
|
for ( size_t i = 0; i < ControlPoints.size(); ++i )
|
|
NETGENPlugin_Mesher::RestrictLocalSize( ngMesh, ControlPoints[i].XYZ(), ControlPoints[i].Size() );
|
|
}
|
|
return;
|
|
}
|
|
|
|
//================================================================================
|
|
/*!
|
|
* \brief Restrict local size to achieve a required _chordalError
|
|
*/
|
|
//================================================================================
|
|
|
|
void NETGENPlugin_Mesher::SetLocalSizeForChordalError( netgen::OCCGeometry& occgeo,
|
|
netgen::Mesh& ngMesh)
|
|
{
|
|
if ( _chordalError <= 0. )
|
|
return;
|
|
|
|
TopLoc_Location loc;
|
|
BRepLProp_SLProps surfProp( 2, 1e-6 );
|
|
const double sizeCoef = 0.95;
|
|
|
|
// find non-planar FACEs with non-constant curvature
|
|
std::vector<int> fInd;
|
|
for ( int i = 1; i <= occgeo.fmap.Extent(); ++i )
|
|
{
|
|
const TopoDS_Face& face = TopoDS::Face( occgeo.fmap( i ));
|
|
BRepAdaptor_Surface surfAd( face, false );
|
|
switch ( surfAd.GetType() )
|
|
{
|
|
case GeomAbs_Plane:
|
|
continue;
|
|
case GeomAbs_Cylinder:
|
|
case GeomAbs_Sphere:
|
|
case GeomAbs_Torus: // constant curvature
|
|
{
|
|
surfProp.SetSurface( surfAd );
|
|
surfProp.SetParameters( 0, 0 );
|
|
double maxCurv = Max( Abs( surfProp.MaxCurvature()), Abs( surfProp.MinCurvature() ));
|
|
double size = elemSizeForChordalError( _chordalError, 1 / maxCurv );
|
|
#ifdef NETGEN_V6
|
|
occgeo.SetFaceMaxH( i-1, size * sizeCoef, netgen::mparam );
|
|
#else
|
|
occgeo.SetFaceMaxH( i, size * sizeCoef );
|
|
#endif
|
|
// limit size one edges
|
|
TopTools_MapOfShape edgeMap;
|
|
for ( TopExp_Explorer eExp( face, TopAbs_EDGE ); eExp.More(); eExp.Next() )
|
|
if ( edgeMap.Add( eExp.Current() ))
|
|
setLocalSize( TopoDS::Edge( eExp.Current() ), size, ngMesh, /*overrideMinH=*/false );
|
|
break;
|
|
}
|
|
default:
|
|
Handle(Geom_Surface) surf = BRep_Tool::Surface( face, loc );
|
|
if ( GeomLib_IsPlanarSurface( surf ).IsPlanar() )
|
|
continue;
|
|
fInd.push_back( i );
|
|
}
|
|
}
|
|
// set local size
|
|
if ( !fInd.empty() )
|
|
{
|
|
BRep_Builder b;
|
|
TopoDS_Compound allFacesComp;
|
|
b.MakeCompound( allFacesComp );
|
|
for ( size_t i = 0; i < fInd.size(); ++i )
|
|
b.Add( allFacesComp, occgeo.fmap( fInd[i] ));
|
|
|
|
// copy the shape to avoid spoiling its triangulation
|
|
TopoDS_Shape allFacesCompCopy = BRepBuilderAPI_Copy( allFacesComp );
|
|
|
|
// create triangulation with desired chordal error
|
|
BRepMesh_IncrementalMesh( allFacesCompCopy,
|
|
_chordalError,
|
|
/*isRelative = */Standard_False,
|
|
/*theAngDeflection = */ 0.5,
|
|
/*isInParallel = */Standard_True);
|
|
|
|
// loop on FACEs
|
|
for ( TopExp_Explorer fExp( allFacesCompCopy, TopAbs_FACE ); fExp.More(); fExp.Next() )
|
|
{
|
|
const TopoDS_Face& face = TopoDS::Face( fExp.Current() );
|
|
Handle(Poly_Triangulation) triangulation = BRep_Tool::Triangulation ( face, loc );
|
|
if ( triangulation.IsNull() ) continue;
|
|
|
|
BRepAdaptor_Surface surf( face, false );
|
|
surfProp.SetSurface( surf );
|
|
|
|
gp_XY uv[3];
|
|
gp_XYZ p[3];
|
|
double size[3];
|
|
for ( int i = 1; i <= triangulation->NbTriangles(); ++i )
|
|
{
|
|
Standard_Integer n1,n2,n3;
|
|
triangulation->Triangles()(i).Get( n1,n2,n3 );
|
|
p [0] = triangulation->Nodes()(n1).Transformed(loc).XYZ();
|
|
p [1] = triangulation->Nodes()(n2).Transformed(loc).XYZ();
|
|
p [2] = triangulation->Nodes()(n3).Transformed(loc).XYZ();
|
|
uv[0] = triangulation->UVNodes()(n1).XY();
|
|
uv[1] = triangulation->UVNodes()(n2).XY();
|
|
uv[2] = triangulation->UVNodes()(n3).XY();
|
|
surfProp.SetParameters( uv[0].X(), uv[0].Y() );
|
|
if ( !surfProp.IsCurvatureDefined() )
|
|
break;
|
|
|
|
for ( int n = 0; n < 3; ++n ) // get size at triangle nodes
|
|
{
|
|
surfProp.SetParameters( uv[n].X(), uv[n].Y() );
|
|
double maxCurv = Max( Abs( surfProp.MaxCurvature()), Abs( surfProp.MinCurvature() ));
|
|
size[n] = elemSizeForChordalError( _chordalError, 1 / maxCurv );
|
|
}
|
|
for ( int n1 = 0; n1 < 3; ++n1 ) // limit size along each triangle edge
|
|
{
|
|
int n2 = ( n1 + 1 ) % 3;
|
|
double minSize = size[n1], maxSize = size[n2];
|
|
if ( size[n1] > size[n2] )
|
|
minSize = size[n2], maxSize = size[n1];
|
|
|
|
if ( maxSize / minSize < 1.2 ) // netgen ignores size difference < 1.2
|
|
{
|
|
ngMesh.RestrictLocalHLine ( netgen::Point3d( p[n1].X(), p[n1].Y(), p[n1].Z() ),
|
|
netgen::Point3d( p[n2].X(), p[n2].Y(), p[n2].Z() ),
|
|
sizeCoef * minSize );
|
|
}
|
|
else
|
|
{
|
|
gp_XY uvVec( uv[n2] - uv[n1] );
|
|
double len = ( p[n1] - p[n2] ).Modulus();
|
|
int nb = int( len / minSize ) + 1;
|
|
for ( int j = 0; j <= nb; ++j )
|
|
{
|
|
double r = double( j ) / nb;
|
|
gp_XY uvj = uv[n1] + r * uvVec;
|
|
|
|
surfProp.SetParameters( uvj.X(), uvj.Y() );
|
|
double maxCurv = Max( Abs( surfProp.MaxCurvature()), Abs( surfProp.MinCurvature() ));
|
|
double h = elemSizeForChordalError( _chordalError, 1 / maxCurv );
|
|
|
|
const gp_Pnt& pj = surfProp.Value();
|
|
netgen::Point3d ngP( pj.X(), pj.Y(), pj.Z());
|
|
ngMesh.RestrictLocalH( ngP, h * sizeCoef );
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
//================================================================================
|
|
/*!
|
|
* \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 );
|
|
|
|
Bnd_Box bb;
|
|
BRepBndLib::Add (shape, bb);
|
|
double x1,y1,z1,x2,y2,z2;
|
|
bb.Get (x1,y1,z1,x2,y2,z2);
|
|
netgen::Point<3> p1 = netgen::Point<3> (x1,y1,z1);
|
|
netgen::Point<3> p2 = netgen::Point<3> (x2,y2,z2);
|
|
occgeo.boundingbox = netgen::Box<3> (p1,p2);
|
|
|
|
occgeo.shape = shape;
|
|
occgeo.changed = 1;
|
|
|
|
// fill maps of shapes of occgeo with not yet meshed subshapes
|
|
|
|
// 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() ));
|
|
}
|
|
|
|
int totNbFaces = 0;
|
|
|
|
// 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() )
|
|
{
|
|
SMESH_subMesh* sm = smIt->next();
|
|
TopoDS_Shape shape = sm->GetSubShape();
|
|
totNbFaces += ( shape.ShapeType() == TopAbs_FACE );
|
|
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 ); // issue 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 );
|
|
}
|
|
}
|
|
}
|
|
occgeo.facemeshstatus.SetSize (totNbFaces);
|
|
occgeo.facemeshstatus = 0;
|
|
occgeo.face_maxh_modified.SetSize(totNbFaces);
|
|
occgeo.face_maxh_modified = 0;
|
|
occgeo.face_maxh.SetSize(totNbFaces);
|
|
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 )
|
|
{
|
|
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]));
|
|
}
|
|
}
|
|
}
|
|
if ( minh > 0.25 * bb.SquareExtent() ) // simple geometry, rough triangulation
|
|
{
|
|
minh = 1e-3 * sqrt( bb.SquareExtent());
|
|
//cout << "BND BOX minh = " <<minh << endl;
|
|
}
|
|
else
|
|
{
|
|
minh = sqrt( minh ); // triangulation for visualization is rather fine
|
|
//cout << "TRIANGULATION minh = " <<minh << endl;
|
|
}
|
|
if ( minh > 0.5 * maxSize )
|
|
minh = maxSize / 3.;
|
|
|
|
return minh;
|
|
}
|
|
|
|
//================================================================================
|
|
/*!
|
|
* \brief Restrict size of elements at a given point
|
|
*/
|
|
//================================================================================
|
|
|
|
void NETGENPlugin_Mesher::RestrictLocalSize(netgen::Mesh& ngMesh,
|
|
const gp_XYZ& p,
|
|
double size,
|
|
const bool overrideMinH)
|
|
{
|
|
if ( size <= std::numeric_limits<double>::min() )
|
|
return;
|
|
if ( netgen::mparam.minh > size )
|
|
{
|
|
if ( overrideMinH )
|
|
{
|
|
ngMesh.SetMinimalH( size );
|
|
netgen::mparam.minh = size;
|
|
}
|
|
else
|
|
{
|
|
size = netgen::mparam.minh;
|
|
}
|
|
}
|
|
netgen::Point3d pi(p.X(), p.Y(), p.Z());
|
|
ngMesh.RestrictLocalH( pi, size );
|
|
}
|
|
|
|
//================================================================================
|
|
/*!
|
|
* \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_MesherHelper* quadHelper,
|
|
SMESH_ProxyMesh::Ptr proxyMesh)
|
|
{
|
|
TNode2IdMap nodeNgIdMap;
|
|
for ( size_t 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);
|
|
SMESHDS_Mesh* meshDS = _mesh->GetMeshDS();
|
|
|
|
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 = meshDS->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() )
|
|
{
|
|
list< TopoDS_Edge >::iterator eIt = edges.begin();
|
|
while ( helper.IsRealSeam( *eIt )) ++eIt;
|
|
if ( eIt != edges.end() )
|
|
eNotSeam = *eIt;
|
|
}
|
|
TopAbs_Orientation fOri = helper.GetSubShapeOri( face, eNotSeam );
|
|
bool isForwad = ( fOri == eNotSeam.Orientation() || fOri >= TopAbs_INTERNAL );
|
|
|
|
// get all nodes from connected <edges>
|
|
const bool skipMedium = netgen::mparam.secondorder;//smDS->IsQuadratic();
|
|
StdMeshers_FaceSide fSide( face, edges, _mesh, isForwad, skipMedium, &helper );
|
|
const vector<UVPtStruct>& points = fSide.GetUVPtStruct();
|
|
if ( points.empty() )
|
|
return false; // invalid node params?
|
|
smIdType 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 )
|
|
{
|
|
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 " << meshDS->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 )
|
|
{
|
|
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
|
|
}
|
|
}
|
|
} // loop on geomEdge ancestors
|
|
|
|
if ( quadHelper ) // remember medium nodes of sub-meshes
|
|
{
|
|
SMDS_ElemIteratorPtr edges = smDS->GetElements();
|
|
while ( edges->more() )
|
|
{
|
|
const SMDS_MeshElement* e = edges->next();
|
|
if ( !quadHelper->AddTLinks( static_cast< const SMDS_MeshEdge*>( e )))
|
|
break;
|
|
}
|
|
}
|
|
|
|
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; // ng IDs
|
|
int solidSMDSIDs[2] = { 0,0 }; // smds IDs
|
|
{
|
|
PShapeIteratorPtr solidIt = helper.GetAncestors( geomFace, *sm->GetFather(), TopAbs_SOLID);
|
|
while ( const TopoDS_Shape * solid = solidIt->next() )
|
|
{
|
|
int id = occgeom.somap.FindIndex ( *solid );
|
|
if ( solidID1 && id != solidID1 ) solidID2 = id;
|
|
else solidID1 = id;
|
|
if ( id ) solidSMDSIDs[ bool( solidSMDSIDs[0] )] = meshDS->ShapeToIndex( *solid );
|
|
}
|
|
}
|
|
bool isShrunk = true;
|
|
if ( proxyMesh && proxyMesh->GetProxySubMesh( geomFace ))
|
|
{
|
|
// if a proxy sub-mesh contains temporary faces, then these faces
|
|
// should be used to mesh only one SOLID
|
|
smDS = proxyMesh->GetSubMesh( geomFace );
|
|
SMDS_ElemIteratorPtr faces = smDS->GetElements();
|
|
while ( faces->more() )
|
|
{
|
|
const SMDS_MeshElement* f = faces->next();
|
|
if ( proxyMesh->IsTemporary( f ))
|
|
{
|
|
isShrunk = false;
|
|
if ( solidSMDSIDs[1] && proxyMesh->HasPrismsOnTwoSides( meshDS->MeshElements( geomFace )))
|
|
break;
|
|
else
|
|
solidSMDSIDs[1] = 0;
|
|
std::vector<const SMDS_MeshNode*> fNodes( f->begin_nodes(), f->end_nodes() );
|
|
std::vector<const SMDS_MeshElement*> vols;
|
|
if ( meshDS->GetElementsByNodes( fNodes, vols, SMDSAbs_Volume ) == 1 )
|
|
{
|
|
int geomID = vols[0]->GetShapeID();
|
|
const TopoDS_Shape& solid = meshDS->IndexToShape( geomID );
|
|
if ( !solid.IsNull() )
|
|
solidID1 = occgeom.somap.FindIndex ( solid );
|
|
solidID2 = 0;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
const int fID = occgeom.fmap.FindIndex( geomFace );
|
|
if ( isShrunk ) // shrunk mesh
|
|
{
|
|
// move netgen points according to moved nodes
|
|
SMESH_subMeshIteratorPtr smIt = sm->getDependsOnIterator(/*includeSelf=*/true);
|
|
while ( smIt->more() )
|
|
{
|
|
SMESH_subMesh* sub = smIt->next();
|
|
if ( !sub->GetSubMeshDS() ) continue;
|
|
SMDS_NodeIteratorPtr nodeIt = sub->GetSubMeshDS()->GetNodes();
|
|
while ( nodeIt->more() )
|
|
{
|
|
const SMDS_MeshNode* n = nodeIt->next();
|
|
int ngID = ngNodeId( n, ngMesh, nodeNgIdMap );
|
|
netgen::MeshPoint& ngPoint = ngMesh.Point( ngID );
|
|
ngPoint(0) = n->X();
|
|
ngPoint(1) = n->Y();
|
|
ngPoint(2) = n->Z();
|
|
}
|
|
}
|
|
// remove faces near boundary to avoid their overlapping
|
|
// with shrunk faces
|
|
for ( int i = 1; i <= ngMesh.GetNSE(); ++i )
|
|
{
|
|
const netgen::Element2d& elem = ngMesh.SurfaceElement(i);
|
|
if ( elem.GetIndex() == fID )
|
|
{
|
|
for ( int iN = 0; iN < elem.GetNP(); ++iN )
|
|
if ( ngMesh[ elem[ iN ]].Type() != netgen::SURFACEPOINT )
|
|
{
|
|
ngMesh.DeleteSurfaceElement( i );
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
// exclude faces generated by NETGEN from computation of 3D mesh
|
|
//if ( hasTmp )
|
|
{
|
|
faceNgID++;
|
|
ngMesh.AddFaceDescriptor( netgen::FaceDescriptor( faceNgID,/*solid1=*/0,/*solid2=*/0,0 ));
|
|
for (int i = 1; i <= ngMesh.GetNSE(); ++i )
|
|
{
|
|
const netgen::Element2d& elem = ngMesh.SurfaceElement(i);
|
|
if ( elem.GetIndex() == fID )
|
|
const_cast< netgen::Element2d& >( elem ).SetIndex( faceNgID );
|
|
}
|
|
}
|
|
} // if proxy
|
|
else
|
|
{
|
|
solidSMDSIDs[1] = 0;
|
|
}
|
|
const bool hasVLOn2Sides = ( solidSMDSIDs[1] > 0 && !isShrunk );
|
|
|
|
// Add ng face descriptors of meshed faces
|
|
faceNgID++;
|
|
if ( hasVLOn2Sides )
|
|
{
|
|
// viscous layers are on two sides of the FACE
|
|
ngMesh.AddFaceDescriptor( netgen::FaceDescriptor( faceNgID, solidID1, 0, 0 ));
|
|
faceNgID++;
|
|
ngMesh.AddFaceDescriptor( netgen::FaceDescriptor( faceNgID, 0, solidID2, 0 ));
|
|
}
|
|
else
|
|
{
|
|
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 );
|
|
if ( occgeom.facemeshstatus.Size() < fID ) occgeom.facemeshstatus.SetSize( fID );
|
|
occgeom.facemeshstatus[ fID-1 ] = netgen::FACE_MESHED_OK;
|
|
while ( fID < faceNgID ) // geomFace is already in occgeom.fmap, add a copy
|
|
{
|
|
fID = occgeom.fmap.Add( BRepBuilderAPI_Copy( geomFace, /*copyGeom=*/false ));
|
|
if ( occgeom.facemeshstatus.Size() < fID ) occgeom.facemeshstatus.SetSize( fID );
|
|
occgeom.facemeshstatus[ fID-1 ] = netgen::FACE_MESHED_OK;
|
|
}
|
|
// Problem with the second order in a quadrangular mesh remains.
|
|
// 1) All quadrangles generated 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 quadratic
|
|
// 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 )));
|
|
}
|
|
|
|
// Add surface elements
|
|
|
|
netgen::Element2d tri(3);
|
|
tri.SetIndex( faceNgID );
|
|
SMESH_TNodeXYZ xyz[3];
|
|
|
|
#ifdef DUMP_TRIANGLES
|
|
cout << "SMESH face " << meshDS->ShapeToIndex( geomFace )
|
|
<< " internal="<<isInternalFace << endl;
|
|
#endif
|
|
|
|
SMDS_ElemIteratorPtr faces = smDS->GetElements();
|
|
while ( faces->more() )
|
|
{
|
|
const SMDS_MeshElement* f = faces->next();
|
|
if ( f->NbNodes() % 3 != 0 ) // not triangle
|
|
{
|
|
PShapeIteratorPtr solidIt = helper.GetAncestors( geomFace,*sm->GetFather(),TopAbs_SOLID);
|
|
if ( const TopoDS_Shape * solid = solidIt->next() )
|
|
sm = _mesh->GetSubMesh( *solid );
|
|
SMESH_BadInputElements* badElems =
|
|
new SMESH_BadInputElements( meshDS, COMPERR_BAD_INPUT_MESH, "Not triangle sub-mesh");
|
|
badElems->add( f );
|
|
sm->GetComputeError().reset( badElems );
|
|
return false;
|
|
}
|
|
|
|
if ( hasVLOn2Sides )
|
|
tri.SetIndex( getFaceNgID( f, solidSMDSIDs, faceNgID ));
|
|
|
|
for ( int i = 0; i < 3; ++i )
|
|
{
|
|
const SMDS_MeshNode* node = f->GetNode( i ), * inFaceNode=0;
|
|
xyz[i].Set( node );
|
|
|
|
// 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 );
|
|
}
|
|
|
|
// pass a triangle size to NG size-map
|
|
double size = ( ( xyz[0] - xyz[1] ).Modulus() +
|
|
( xyz[1] - xyz[2] ).Modulus() +
|
|
( xyz[2] - xyz[0] ).Modulus() ) / 3;
|
|
gp_XYZ gc = ( xyz[0] + xyz[1] + xyz[2] ) / 3;
|
|
RestrictLocalSize( ngMesh, gc, size, /*overrideMinH=*/false );
|
|
|
|
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
|
|
}
|
|
} // loop on sub-mesh faces
|
|
|
|
if ( quadHelper ) // remember medium nodes of sub-meshes
|
|
{
|
|
SMDS_ElemIteratorPtr faces = smDS->GetElements();
|
|
while ( faces->more() )
|
|
{
|
|
const SMDS_MeshElement* f = faces->next();
|
|
if ( !quadHelper->AddTLinks( static_cast< const SMDS_MeshFace*>( f )))
|
|
break;
|
|
}
|
|
}
|
|
|
|
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() )
|
|
{
|
|
SMESH_subMesh* eSub = helper.GetMesh()->GetSubMesh( *e );
|
|
if (( toAdd = ( eSub->IsEmpty() && !SMESH_Algo::isDegenerated( TopoDS::Edge( *e )))))
|
|
break;
|
|
}
|
|
if ( toAdd )
|
|
{
|
|
SMDS_NodeIteratorPtr nodeIt = smDS->GetNodes();
|
|
if ( nodeIt->more() )
|
|
ngNodeId( nodeIt->next(), ngMesh, nodeNgIdMap );
|
|
}
|
|
break;
|
|
}
|
|
default:;
|
|
} // switch
|
|
} // loop on submeshes
|
|
|
|
// 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 ( i = 1; i <= nbFaces; ++i)
|
|
{
|
|
netgen::Element2d elem = ngMesh.SurfaceElement(i);
|
|
if ( ngFaceIds.count( elem.GetIndex() ))
|
|
{
|
|
swap( elem[1], elem[2] );
|
|
ngMesh.AddSurfaceElement (elem);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
//================================================================================
|
|
/*!
|
|
* \brief Tries to heal the mesh on a FACE. The FACE is supposed to be partially
|
|
* meshed due to NETGEN failure
|
|
* \param [in] occgeom - geometry
|
|
* \param [in,out] ngMesh - the mesh to fix
|
|
* \param [inout] faceID - ID of the FACE to fix the mesh on
|
|
* \return bool - is mesh is or becomes OK
|
|
*/
|
|
//================================================================================
|
|
|
|
bool NETGENPlugin_Mesher::FixFaceMesh(const netgen::OCCGeometry& occgeom,
|
|
netgen::Mesh& ngMesh,
|
|
const int faceID)
|
|
{
|
|
// we address a case where the FACE is almost fully meshed except small holes
|
|
// of usually triangular shape at FACE boundary (IPAL52861)
|
|
|
|
// The case appeared to be not simple: holes only look triangular but
|
|
// indeed are a self intersecting polygon. A reason of the bug was in coincident
|
|
// NG points on a seam edge. But the code below is very nice, leave it for
|
|
// another case.
|
|
return false;
|
|
|
|
|
|
if ( occgeom.fmap.Extent() < faceID )
|
|
return false;
|
|
//const TopoDS_Face& face = TopoDS::Face( occgeom.fmap( faceID ));
|
|
|
|
// find free links on the FACE
|
|
TLinkMap linkMap;
|
|
for ( int iF = 1; iF <= ngMesh.GetNSE(); ++iF )
|
|
{
|
|
const netgen::Element2d& elem = ngMesh.SurfaceElement(iF);
|
|
if ( faceID != elem.GetIndex() )
|
|
continue;
|
|
int n0 = elem[ elem.GetNP() - 1 ];
|
|
for ( int i = 0; i < elem.GetNP(); ++i )
|
|
{
|
|
int n1 = elem[i];
|
|
Link link( n0, n1 );
|
|
if ( !linkMap.Add( link ))
|
|
linkMap.Remove( link );
|
|
n0 = n1;
|
|
}
|
|
}
|
|
// add/remove boundary links
|
|
for ( int iSeg = 1; iSeg <= ngMesh.GetNSeg(); ++iSeg )
|
|
{
|
|
const netgen::Segment& seg = ngMesh.LineSegment( iSeg );
|
|
if ( seg.si != faceID ) // !edgeIDs.Contains( seg.edgenr ))
|
|
continue;
|
|
Link link( seg[1], seg[0] ); // reverse!!!
|
|
if ( !linkMap.Add( link ))
|
|
linkMap.Remove( link );
|
|
}
|
|
if ( linkMap.IsEmpty() )
|
|
return true;
|
|
if ( linkMap.Extent() < 3 )
|
|
return false;
|
|
|
|
// make triangles of the links
|
|
|
|
netgen::Element2d tri(3);
|
|
tri.SetIndex ( faceID );
|
|
|
|
TLinkMap::Iterator linkIt( linkMap );
|
|
Link link1 = linkIt.Value();
|
|
// look for a link connected to link1
|
|
TLinkMap::Iterator linkIt2 = linkIt;
|
|
for ( linkIt2.Next(); linkIt2.More(); linkIt2.Next() )
|
|
{
|
|
const Link& link2 = linkIt2.Value();
|
|
if ( link2.IsConnected( link1 ))
|
|
{
|
|
// look for a link connected to both link1 and link2
|
|
TLinkMap::Iterator linkIt3 = linkIt2;
|
|
for ( linkIt3.Next(); linkIt3.More(); linkIt3.Next() )
|
|
{
|
|
const Link& link3 = linkIt3.Value();
|
|
if ( link3.IsConnected( link1 ) &&
|
|
link3.IsConnected( link2 ) )
|
|
{
|
|
// add a triangle
|
|
tri[0] = link1.n2;
|
|
tri[1] = link1.n1;
|
|
tri[2] = ( link2.Contains( link1.n1 ) ? link2.n1 : link3.n1 );
|
|
if ( tri[0] == tri[2] || tri[1] == tri[2] )
|
|
return false;
|
|
ngMesh.AddSurfaceElement( tri );
|
|
|
|
// prepare for the next tria search
|
|
if ( linkMap.Extent() == 3 )
|
|
return true;
|
|
linkMap.Remove( link3 );
|
|
linkMap.Remove( link2 );
|
|
linkIt.Next();
|
|
linkMap.Remove( link1 );
|
|
link1 = linkIt.Value();
|
|
linkIt2 = linkIt;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return false;
|
|
|
|
} // FixFaceMesh()
|
|
|
|
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 corresponding 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)));
|
|
}
|
|
|
|
// inline double dist2(const netgen::MeshPoint& p, const SMDS_MeshNode* n )
|
|
// {
|
|
// return gp_Pnt( NGPOINT_COORDS(p)).SquareDistance( SMESH_NodeXYZ(n));
|
|
// }
|
|
}
|
|
|
|
//================================================================================
|
|
/*!
|
|
* \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 ((int) 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 = true;
|
|
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)
|
|
{
|
|
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;
|
|
}
|
|
}
|
|
// 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 )
|
|
{
|
|
// 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);
|
|
}
|
|
|
|
}
|
|
ngMesh.CalcSurfacesOfNode();
|
|
}
|
|
|
|
//================================================================================
|
|
/*!
|
|
* \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()"<<endl
|
|
<< "m = smesh.Mesh(name='triangles')" << endl;
|
|
#endif
|
|
if ((int) 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(0)<<", "<< mpV(1)<<", "<< mpV(2)<<") "<< endl
|
|
<< "n2 = m.AddNode( "<< mp[0](0)<<", "<< mp[0](1)<<", "<< mp[0](2)<<") "<< endl
|
|
<< "n3 = m.AddNode( "<< mp[1](0)<<", "<< mp[1](1)<<", "<< mp[1](2)<<" )" << 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,
|
|
const bool overrideMinH)
|
|
{
|
|
// ----------------------------
|
|
// Check wires and count nodes
|
|
// ----------------------------
|
|
smIdType nbNodes = 0;
|
|
for ( size_t 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 ((int) 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 ( size_t 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 ( size_t iW = 0; iW < wires.size(); ++iW )
|
|
{
|
|
StdMeshers_FaceSidePtr wire = wires[ iW ];
|
|
const vector<UVPtStruct>& uvPtVec = wire->GetUVPtStruct();
|
|
const smIdType 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 ) || helper.IsRealSeam( posShapeID ))
|
|
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, (int) nbSegments );
|
|
int iNext = SMESH_MesherHelper::WrapIndex( i+1, (int) 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, overrideMinH );
|
|
}
|
|
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 REVERSE of the previous one" << endl;
|
|
continue;
|
|
}
|
|
}
|
|
cout << "Segment: " << seg.edgenr << endl
|
|
<< "\tp1: " << seg[0] << " n" << nodeVec[ seg[0]]->GetID() << endl
|
|
<< "\tp2: " << seg[1] << " n" << nodeVec[ seg[1]]->GetID() << 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;
|
|
#else
|
|
SMESH_Comment __not_unused_variable( prevNbNGSeg );
|
|
#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
|
|
* \param comment - returns problem description
|
|
* \param quadHelper - holder of medium nodes of sub-meshes
|
|
* \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,
|
|
SMESH_MesherHelper* quadHelper)
|
|
{
|
|
int nbNod = ngMesh.GetNP();
|
|
int nbSeg = ngMesh.GetNSeg();
|
|
int nbFac = ngMesh.GetNSE();
|
|
int nbVol = ngMesh.GetNE();
|
|
|
|
SMESHDS_Mesh* meshDS = sMesh.GetMeshDS();
|
|
|
|
// quadHelper is used for either
|
|
// 1) making quadratic elements when a lower dimension mesh is loaded
|
|
// to SMESH before conversion to quadratic by NETGEN
|
|
// 2) sewing of quadratic elements with quadratic elements of sub-meshes
|
|
if ( quadHelper && !quadHelper->GetIsQuadratic() && quadHelper->GetTLinkNodeMap().empty() )
|
|
quadHelper = 0;
|
|
|
|
int ngID, nbInitNod = initState._nbNodes;
|
|
if ( initState._elementsRemoved )
|
|
{
|
|
// PAL23427. Update nodeVec to track removal of netgen free points as a result
|
|
// of removal of faces in FillNgMesh() in the case of a shrunk sub-mesh
|
|
size_t i, nodeVecSize = nodeVec.size();
|
|
const double eps = std::numeric_limits<double>::min();
|
|
for ( i = ngID = 1; i < nodeVecSize; ++ngID, ++i )
|
|
{
|
|
gp_Pnt ngPnt( NGPOINT_COORDS( ngMesh.Point( ngID )));
|
|
gp_Pnt node ( SMESH_NodeXYZ (nodeVec_ACCESS(i) ));
|
|
if ( ngPnt.SquareDistance( node ) < eps )
|
|
{
|
|
nodeVec[ ngID ] = nodeVec[ i ];
|
|
}
|
|
else
|
|
{
|
|
--ngID;
|
|
}
|
|
}
|
|
nodeVec.resize( ngID );
|
|
nbInitNod = ngID - 1;
|
|
}
|
|
// -------------------------------------
|
|
// Create and insert nodes into nodeVec
|
|
// -------------------------------------
|
|
|
|
if ( nbNod > nbInitNod )
|
|
nodeVec.resize( nbNod + 1 );
|
|
for ( int 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 (!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 ( int 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;
|
|
if ( quadHelper ) // final mesh must be quadratic
|
|
edge = quadHelper->AddEdge(nodeVec_ACCESS(pinds[0]), nodeVec_ACCESS(pinds[1]));
|
|
else
|
|
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)
|
|
{
|
|
if ( comment.empty() ) comment << "Cannot create a mesh edge";
|
|
MESSAGE("Cannot create a mesh edge");
|
|
nbSeg = nbFac = nbVol = 0;
|
|
break;
|
|
}
|
|
if ( !aEdge.IsNull() && edge->GetShapeID() < 1 )
|
|
meshDS->SetMeshElementOnShape(edge, aEdge);
|
|
}
|
|
else if ( comment.empty() )
|
|
{
|
|
comment << "Invalid netgen segment #" << i;
|
|
}
|
|
}
|
|
|
|
// ----------------------------------------
|
|
// Create mesh faces along geometric faces
|
|
// ----------------------------------------
|
|
|
|
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));
|
|
|
|
vector<const SMDS_MeshNode*> nodes;
|
|
for ( int i = nbInitFac+1; i <= nbFac; ++i )
|
|
{
|
|
const netgen::Element2d& elem = ngMesh.SurfaceElement(i);
|
|
const int aGeomFaceInd = elem.GetIndex();
|
|
TopoDS_Face aFace;
|
|
if (aGeomFaceInd > 0 && aGeomFaceInd <= occgeo.fmap.Extent())
|
|
aFace = TopoDS::Face(occgeo.fmap(aGeomFaceInd));
|
|
nodes.clear();
|
|
for ( int j = 1; j <= elem.GetNP(); ++j )
|
|
{
|
|
int pind = elem.PNum(j);
|
|
if ( pind < 1 || pind >= (int) 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 ((int) 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:
|
|
if ( quadHelper ) // final mesh must be quadratic
|
|
face = quadHelper->AddFace(nodes[0],nodes[1],nodes[2]);
|
|
else
|
|
face = meshDS->AddFace(nodes[0],nodes[1],nodes[2]);
|
|
break;
|
|
case netgen::QUAD:
|
|
if ( quadHelper ) // final mesh must be quadratic
|
|
face = quadHelper->AddFace(nodes[0],nodes[1],nodes[2],nodes[3]);
|
|
else
|
|
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:
|
|
nodes[5] = mediumNode( nodes[0],nodes[1],nodes[5], quadHelper );
|
|
nodes[3] = mediumNode( nodes[1],nodes[2],nodes[3], quadHelper );
|
|
nodes[4] = mediumNode( nodes[2],nodes[0],nodes[4], quadHelper );
|
|
face = meshDS->AddFace(nodes[0],nodes[1],nodes[2],nodes[5],nodes[3],nodes[4]);
|
|
break;
|
|
case netgen::QUAD8:
|
|
nodes[4] = mediumNode( nodes[0],nodes[1],nodes[4], quadHelper );
|
|
nodes[7] = mediumNode( nodes[1],nodes[2],nodes[7], quadHelper );
|
|
nodes[5] = mediumNode( nodes[2],nodes[3],nodes[5], quadHelper );
|
|
nodes[6] = mediumNode( nodes[3],nodes[0],nodes[6], quadHelper );
|
|
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 ( int 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));
|
|
nodes.clear();
|
|
for ( int j = 1; j <= elem.GetNP(); ++j )
|
|
{
|
|
int pind = elem.PNum(j);
|
|
if ( pind < 1 || pind >= (int)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 ((int) 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:
|
|
nodes[4] = mediumNode( nodes[0],nodes[1],nodes[4], quadHelper );
|
|
nodes[7] = mediumNode( nodes[1],nodes[2],nodes[7], quadHelper );
|
|
nodes[5] = mediumNode( nodes[2],nodes[0],nodes[5], quadHelper );
|
|
nodes[6] = mediumNode( nodes[0],nodes[3],nodes[6], quadHelper );
|
|
nodes[8] = mediumNode( nodes[1],nodes[3],nodes[8], quadHelper );
|
|
nodes[9] = mediumNode( nodes[2],nodes[3],nodes[9], quadHelper );
|
|
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 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 ) -- 23047
|
|
// continue;
|
|
int nbNodesOnSolid = 0, nbNodes = elem->NbNodes();
|
|
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 ||
|
|
nbNodesOnSolid == nbNodes)
|
|
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;
|
|
|
|
SMESH_ComputeErrorPtr error = SMESH_ComputeError::New();
|
|
SMESH_MesherHelper quadHelper( *_mesh );
|
|
quadHelper.SetIsQuadratic( mparams.secondorder );
|
|
|
|
// -------------------------
|
|
// 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
|
|
int startWith = netgen::MESHCONST_ANALYSE;
|
|
int endWith = netgen::MESHCONST_ANALYSE;
|
|
try
|
|
{
|
|
OCC_CATCH_SIGNALS;
|
|
|
|
err = ngLib.GenerateMesh(occgeo, startWith, endWith, _ngMesh);
|
|
|
|
if(netgen::multithread.terminate)
|
|
return false;
|
|
|
|
comment << text(err);
|
|
}
|
|
catch (Standard_Failure& ex)
|
|
{
|
|
comment << text(ex);
|
|
}
|
|
catch (netgen::NgException & ex)
|
|
{
|
|
comment << text(ex);
|
|
#ifdef NETGEN_V6
|
|
bool hasSizeFile = !mparams.meshsizefilename.empty();
|
|
#else
|
|
bool hasSizeFile = mparams.meshsizefilename;
|
|
#endif
|
|
if ( hasSizeFile )
|
|
throw SMESH_ComputeError(COMPERR_BAD_PARMETERS, comment );
|
|
}
|
|
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 ( !mparams.uselocalh ) // mparams.grading is not taken into account yet
|
|
_ngMesh->LocalHFunction().SetGrading( mparams.grading );
|
|
|
|
if ( _simpleHyp )
|
|
{
|
|
// Pass 1D simple parameters to NETGEN
|
|
// --------------------------------
|
|
double nbSeg = (double) _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 shapes
|
|
SetLocalSize( occgeo, *_ngMesh );
|
|
SetLocalSizeForChordalError( occgeo, *_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
|
|
ngLib.GenerateMesh(intOccgeo, startWith, endWith, tmpNgMesh);
|
|
|
|
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;
|
|
err = ngLib.GenerateMesh(intOccgeo, startWith, endWith, tmpNgMesh);
|
|
|
|
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 ], &quadHelper));
|
|
}
|
|
initState = NETGENPlugin_ngMeshInfo(_ngMesh);
|
|
|
|
// Compute 1d mesh
|
|
if (!err)
|
|
{
|
|
startWith = endWith = netgen::MESHCONST_MESHEDGES;
|
|
try
|
|
{
|
|
OCC_CATCH_SIGNALS;
|
|
|
|
err = ngLib.GenerateMesh(occgeo, startWith, endWith);
|
|
|
|
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 ) ||
|
|
( !occgeo.fmap.IsEmpty() &&
|
|
StdMeshers_ViscousLayers2D::HasProxyMesh( TopoDS::Face( occgeo.fmap(1) ), *_mesh )))
|
|
{
|
|
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;
|
|
if ( viscousMesh->NbProxySubMeshes() == 0 )
|
|
continue;
|
|
// 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, &helper, 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;
|
|
|
|
err = ngLib.GenerateMesh(occgeo, startWith, endWith);
|
|
|
|
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 || _viscousLayersHyp ))
|
|
{
|
|
// load SMESH with computed segments and faces
|
|
FillSMesh( occgeo, *_ngMesh, initState, *_mesh, nodeVec, comment, &quadHelper );
|
|
|
|
// compute prismatic boundary volumes
|
|
smIdType nbQuad = _mesh->NbQuadrangles();
|
|
SMESH_ProxyMesh::Ptr viscousMesh;
|
|
if ( _viscousLayersHyp )
|
|
{
|
|
viscousMesh = _viscousLayersHyp->Compute( *_mesh, _shape );
|
|
if ( !viscousMesh )
|
|
return false;
|
|
}
|
|
// compute pyramids on quadrangles
|
|
vector<SMESH_ProxyMesh::Ptr> pyramidMeshes( occgeo.somap.Extent() );
|
|
if ( nbQuad > 0 )
|
|
for ( int iS = 1; iS <= occgeo.somap.Extent(); ++iS )
|
|
{
|
|
StdMeshers_QuadToTriaAdaptor* adaptor = new StdMeshers_QuadToTriaAdaptor;
|
|
pyramidMeshes[ iS-1 ].reset( adaptor );
|
|
bool ok = adaptor->Compute( *_mesh, occgeo.somap(iS), viscousMesh.get() );
|
|
if ( !ok )
|
|
return false;
|
|
}
|
|
// add proxy faces to NG mesh
|
|
list< SMESH_subMesh* > viscousSM;
|
|
for ( int iS = 1; iS <= occgeo.somap.Extent(); ++iS )
|
|
{
|
|
list< SMESH_subMesh* > quadFaceSM;
|
|
for (TopExp_Explorer face(occgeo.somap(iS), TopAbs_FACE); face.More(); face.Next())
|
|
if ( pyramidMeshes[iS-1] && pyramidMeshes[iS-1]->GetProxySubMesh( face.Current() ))
|
|
{
|
|
quadFaceSM.push_back( _mesh->GetSubMesh( face.Current() ));
|
|
meshedSM[ MeshDim_2D ].remove( quadFaceSM.back() );
|
|
}
|
|
else if ( viscousMesh && viscousMesh->GetProxySubMesh( face.Current() ))
|
|
{
|
|
viscousSM.push_back( _mesh->GetSubMesh( face.Current() ));
|
|
meshedSM[ MeshDim_2D ].remove( viscousSM.back() );
|
|
}
|
|
if ( !quadFaceSM.empty() )
|
|
FillNgMesh(occgeo, *_ngMesh, nodeVec, quadFaceSM, &quadHelper, pyramidMeshes[iS-1]);
|
|
}
|
|
if ( !viscousSM.empty() )
|
|
FillNgMesh(occgeo, *_ngMesh, nodeVec, viscousSM, &quadHelper, viscousMesh );
|
|
|
|
// fill _ngMesh with faces of sub-meshes
|
|
err = ! ( FillNgMesh(occgeo, *_ngMesh, nodeVec, meshedSM[ MeshDim_2D ], &quadHelper));
|
|
initState = NETGENPlugin_ngMeshInfo(_ngMesh, /*checkRemovedElems=*/true);
|
|
// toPython( _ngMesh )
|
|
}
|
|
if (!err && _isVolume)
|
|
{
|
|
// Pass 3D simple parameters to NETGEN
|
|
const NETGENPlugin_SimpleHypothesis_3D* simple3d =
|
|
dynamic_cast< const NETGENPlugin_SimpleHypothesis_3D* > ( _simpleHyp );
|
|
if ( simple3d ) {
|
|
_ngMesh->Compress();
|
|
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;
|
|
ngLib.CalcLocalH( ngLib._ngMesh );
|
|
}
|
|
// 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, &quadHelper );
|
|
// 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;
|
|
|
|
err = ngLib.GenerateMesh(occgeo, startWith, endWith);
|
|
|
|
if ( netgen::multithread.terminate )
|
|
return false;
|
|
|
|
if ( comment.empty() ) // do not overwrite a previous error
|
|
comment << text(err);
|
|
}
|
|
catch (Standard_Failure& ex)
|
|
{
|
|
if ( comment.empty() ) // do not overwrite a previous error
|
|
comment << text(ex);
|
|
err = 1;
|
|
}
|
|
catch (netgen::NgException& exc)
|
|
{
|
|
if ( comment.empty() ) // do not overwrite a previous 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;
|
|
|
|
err = ngLib.GenerateMesh(occgeo, startWith, endWith);
|
|
|
|
if ( netgen::multithread.terminate )
|
|
return false;
|
|
|
|
if ( comment.empty() ) // do not overwrite a previous error
|
|
comment << text(err);
|
|
}
|
|
catch (Standard_Failure& ex)
|
|
{
|
|
if ( comment.empty() ) // do not overwrite a previous error
|
|
comment << text(ex);
|
|
}
|
|
catch (netgen::NgException& exc)
|
|
{
|
|
if ( comment.empty() ) // do not overwrite a previous error
|
|
comment << text(exc);
|
|
}
|
|
}
|
|
}
|
|
if (!err && mparams.secondorder > 0)
|
|
{
|
|
try
|
|
{
|
|
OCC_CATCH_SIGNALS;
|
|
if ( !meshedSM[ MeshDim_1D ].empty() )
|
|
{
|
|
// remove segments not attached to geometry (IPAL0052479)
|
|
for (int i = 1; i <= _ngMesh->GetNSeg(); ++i)
|
|
{
|
|
const netgen::Segment & seg = _ngMesh->LineSegment (i);
|
|
if ( seg.epgeominfo[ 0 ].edgenr == 0 )
|
|
{
|
|
_ngMesh->DeleteSegment( i );
|
|
initState._nbSegments--;
|
|
}
|
|
}
|
|
_ngMesh->Compress();
|
|
}
|
|
// convert to quadratic
|
|
#ifdef NETGEN_V6
|
|
occgeo.GetRefinement().MakeSecondOrder(*_ngMesh);
|
|
#else
|
|
netgen::OCCRefinementSurfaces(occgeo).MakeSecondOrder(*_ngMesh);
|
|
#endif
|
|
|
|
// care of elements already loaded to SMESH
|
|
// if ( initState._nbSegments > 0 )
|
|
// makeQuadratic( occgeo.emap, _mesh );
|
|
// if ( initState._nbFaces > 0 )
|
|
// makeQuadratic( occgeo.fmap, _mesh );
|
|
}
|
|
catch (Standard_Failure& ex)
|
|
{
|
|
if ( comment.empty() ) // do not overwrite a previous error
|
|
comment << "Exception in netgen at passing to 2nd order ";
|
|
}
|
|
catch (netgen::NgException& exc)
|
|
{
|
|
if ( comment.empty() ) // do not overwrite a previous 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)) );
|
|
|
|
// Feed back the SMESHDS with the generated Nodes and Elements
|
|
if ( true /*isOK*/ ) // get whatever built
|
|
{
|
|
FillSMesh( occgeo, *_ngMesh, initState, *_mesh, nodeVec, comment, &quadHelper );
|
|
|
|
if ( quadHelper.GetIsQuadratic() ) // remove free nodes
|
|
{
|
|
for ( size_t i = 0; i < nodeVec.size(); ++i )
|
|
if ( nodeVec[i] && nodeVec[i]->NbInverseElements() == 0 )
|
|
{
|
|
_mesh->GetMeshDS()->RemoveFreeNode( nodeVec[i], 0, /*fromGroups=*/false );
|
|
nodeVec[i]=0;
|
|
}
|
|
for ( size_t i = nodeVec.size()-1; i > 0; --i ) // remove trailing removed nodes
|
|
if ( !nodeVec[i] )
|
|
nodeVec.resize( i );
|
|
else
|
|
break;
|
|
}
|
|
}
|
|
SMESH_ComputeErrorPtr readErr = ReadErrors(nodeVec);
|
|
if ( readErr && readErr->HasBadElems() )
|
|
{
|
|
error = readErr;
|
|
if ( !comment.empty() && !readErr->myComment.empty() ) comment += "\n";
|
|
comment += readErr->myComment;
|
|
}
|
|
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 == netgen::FACE_MESHED_OK ) continue;
|
|
if ( SMESH_subMesh* sm = _mesh->GetSubMeshContaining( occgeo.fmap( i ))) {
|
|
SMESH_ComputeErrorPtr& smError = sm->GetComputeError();
|
|
if ( !smError || smError->IsOK() ) {
|
|
if ( status == netgen::FACE_FAILED )
|
|
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() ))
|
|
{
|
|
size_t nbIntV = internals.getSolidsWithVertices().find( sm->GetId() )->second.size();
|
|
SMESHDS_SubMesh* smDS = sm->GetSubMeshDS();
|
|
smComputed = ( smDS->NbElements() > 0 || smDS->NbNodes() > (smIdType) nbIntV );
|
|
}
|
|
SMESH_ComputeErrorPtr& smError = sm->GetComputeError();
|
|
if ( !smComputed && ( !smError || smError->IsOK() ))
|
|
{
|
|
smError = error;
|
|
if ( nbVol && SMESH_Algo::GetMeshError( sm ) == SMESH_Algo::MEr_OK )
|
|
{
|
|
smError->myName = COMPERR_WARNING;
|
|
}
|
|
else if ( smError->HasBadElems() ) // bad surface mesh
|
|
{
|
|
if ( !hasBadElemOnSolid
|
|
( static_cast<SMESH_BadInputElements*>( smError.get() )->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;
|
|
NETGENPlugin_Internals internals( *_mesh, _shape, _isVolume );
|
|
PrepareOCCgeometry( occgeo, _shape, *_mesh, 0, &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;
|
|
int startWith = netgen::MESHCONST_ANALYSE;
|
|
int endWith = netgen::MESHCONST_MESHEDGES;
|
|
int err = ngLib.GenerateMesh(occgeo, startWith, endWith, ngMesh);
|
|
|
|
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 shapes
|
|
// SetLocalSize( occgeo, *ngMesh );
|
|
// }
|
|
// calculate total nb of segments and length of edges
|
|
double fullLen = 0.0;
|
|
smIdType 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<smIdType>& aVec = aResMap[_mesh->GetSubMesh(E)];
|
|
if ( aVec.empty() )
|
|
aVec.resize( SMDSEntity_Last, 0);
|
|
else
|
|
fullNbSeg += aVec[ entity ];
|
|
}
|
|
|
|
// store nb of segments computed by Netgen
|
|
TLinkMap 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<smIdType>& 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<smIdType>& 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() ) = (int) 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 / double( fullNbSeg );
|
|
mparams.grading = 0.2; // slow size growth
|
|
}
|
|
}
|
|
mparams.maxh = min( mparams.maxh, occgeo.boundingbox.Diam()/2 );
|
|
mparams.maxh = min( mparams.maxh, fullLen / double( 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 edges;
|
|
for (TopExp_Explorer exp1(F,TopAbs_EDGE); exp1.More(); exp1.Next())
|
|
if ( edges.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<smIdType> 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 / double( 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<smIdType> 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 )
|
|
{
|
|
if ( _isVolume &&
|
|
netgen::multithread.task[0] == 'D'/*elaunay meshing*/ &&
|
|
progress > voluMeshingTime )
|
|
{
|
|
progress = voluMeshingTime;
|
|
((double&) _ticTime) = voluMeshingTime / _totalTime / _progressTic;
|
|
}
|
|
((int&) *algoProgressTic )++;
|
|
((double&) *algoProgress) = progress;
|
|
}
|
|
//cout << progress << " " << *algoProgressTic << " " << netgen::multithread.task << " "<< _ticTime << endl;
|
|
|
|
return Min( progress, 0.99 );
|
|
}
|
|
|
|
//================================================================================
|
|
/*!
|
|
* \brief Read mesh entities preventing successful computation from "test.out" file
|
|
*/
|
|
//================================================================================
|
|
|
|
SMESH_ComputeErrorPtr
|
|
NETGENPlugin_Mesher::ReadErrors(const vector<const SMDS_MeshNode* >& nodeVec)
|
|
{
|
|
if ( nodeVec.size() < 2 ) return SMESH_ComputeErrorPtr();
|
|
SMESH_BadInputElements* err =
|
|
new SMESH_BadInputElements( nodeVec.back()->GetMesh(), COMPERR_BAD_INPUT_MESH,
|
|
"Some edges multiple times in surface mesh");
|
|
SMESH_File file("test.out");
|
|
vector<int> two(2);
|
|
vector<int> three1(3), three2(3);
|
|
const char* badEdgeStr = " multiple times in surface mesh";
|
|
const int badEdgeStrLen = (int) strlen( badEdgeStr );
|
|
const int nbNodes = (int) nodeVec.size();
|
|
|
|
while( !file.eof() )
|
|
{
|
|
if ( strncmp( file, "Edge ", 5 ) == 0 &&
|
|
file.getInts( two ) &&
|
|
strncmp( file, badEdgeStr, badEdgeStrLen ) == 0 &&
|
|
two[0] < nbNodes && two[1] < nbNodes )
|
|
{
|
|
err->myBadElements.push_back( new SMDS_LinearEdge( nodeVec[ two[0]], nodeVec[ two[1]] ));
|
|
file += (int) badEdgeStrLen;
|
|
}
|
|
else if ( strncmp( file, "Intersecting: ", 14 ) == 0 )
|
|
{
|
|
// Intersecting:
|
|
// openelement 18 with open element 126
|
|
// 41 36 38
|
|
// 69 70 72
|
|
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] < nbNodes && nodeVec[ three1[i]]);
|
|
for ( int i = 0; ok && i < 3; ++i )
|
|
ok = ( three2[i] < nbNodes && 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;
|
|
}
|
|
}
|
|
|
|
#ifdef _DEBUG_
|
|
size_t nbBadElems = err->myBadElements.size();
|
|
if ( nbBadElems ) nbBadElems++; // avoid warning: variable set but not used
|
|
#endif
|
|
|
|
return SMESH_ComputeErrorPtr( 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 char* pyFile = "/tmp/ngMesh.py";
|
|
ofstream outfile( pyFile, ios::out );
|
|
if ( !outfile ) return;
|
|
|
|
outfile << "import salome, SMESH" << std::endl
|
|
<< "from salome.smesh import smeshBuilder" << std::endl
|
|
<< "smesh = smeshBuilder.New()" << std::endl
|
|
<< "mesh = smesh.Mesh()" << std::endl << std::endl;
|
|
|
|
using namespace netgen;
|
|
|
|
#ifdef NETGEN_V6
|
|
|
|
for ( int i = 1; i <= ngMesh->GetNP(); i++)
|
|
{
|
|
const Point3d & p = ngMesh->Point(i);
|
|
outfile << "mesh.AddNode( ";
|
|
outfile << p.X() << ", ";
|
|
outfile << p.Y() << ", ";
|
|
outfile << p.Z() << ") ## "<< i << std::endl;
|
|
}
|
|
|
|
int nbDom = ngMesh->GetNDomains();
|
|
for ( int i = 0; i < nbDom; ++i )
|
|
outfile<< "grp" << i+1 << " = mesh.CreateEmptyGroup( SMESH.FACE, 'domain"<< i+1 << "')"<< std::endl;
|
|
|
|
int nbDel = 0;
|
|
for (int i = 1; i <= ngMesh->GetNSE(); i++)
|
|
{
|
|
outfile << "mesh.AddFace([ ";
|
|
Element2d sel = ngMesh->SurfaceElement(i);
|
|
for (int j = 1; j <= sel.GetNP(); j++)
|
|
outfile << sel.PNum(j) << ( j < sel.GetNP() ? ", " : " ])");
|
|
if ( sel.IsDeleted() ) outfile << " ## IsDeleted ";
|
|
outfile << std::endl;
|
|
nbDel += sel.IsDeleted();
|
|
|
|
if (sel.GetIndex())
|
|
{
|
|
if ( int dom1 = ngMesh->GetFaceDescriptor(sel.GetIndex ()).DomainIn())
|
|
outfile << "grp"<< dom1 <<".Add([ " << i - nbDel << " ])" << std::endl;
|
|
if ( int dom2 = ngMesh->GetFaceDescriptor(sel.GetIndex ()).DomainOut())
|
|
outfile << "grp"<< dom2 <<".Add([ " << i - nbDel << " ])" << std::endl;
|
|
}
|
|
}
|
|
|
|
for (int i = 1; i <= ngMesh->GetNE(); i++)
|
|
{
|
|
Element el = ngMesh->VolumeElement(i);
|
|
outfile << "mesh.AddVolume([ ";
|
|
for (int j = 1; j <= el.GetNP(); j++)
|
|
outfile << el.PNum(j) << ( j < el.GetNP() ? ", " : " ])");
|
|
outfile << std::endl;
|
|
}
|
|
|
|
for (int i = 1; i <= ngMesh->GetNSeg(); i++)
|
|
{
|
|
const Segment & seg = ngMesh->LineSegment (i);
|
|
outfile << "mesh.AddEdge([ "
|
|
<< seg[0]+1 << ", "
|
|
<< seg[1]+1 << " ])" << std::endl;
|
|
}
|
|
|
|
#else //////// V 5
|
|
|
|
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 << std::endl;
|
|
}
|
|
|
|
int nbDom = ngMesh->GetNDomains();
|
|
for ( int i = 0; i < nbDom; ++i )
|
|
outfile<< "grp" << i+1 << " = mesh.CreateEmptyGroup( SMESH.FACE, 'domain"<< i+1 << "')"<< std::endl;
|
|
|
|
int nbDel = 0;
|
|
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 << std::endl;
|
|
nbDel += sel.IsDeleted();
|
|
|
|
if ((*ngMesh)[sei].GetIndex())
|
|
{
|
|
if ( int dom1 = ngMesh->GetFaceDescriptor((*ngMesh)[sei].GetIndex ()).DomainIn())
|
|
outfile << "grp"<< dom1 <<".Add([ " << (int)sei+1 - nbDel << " ])" << std::endl;
|
|
if ( int dom2 = ngMesh->GetFaceDescriptor((*ngMesh)[sei].GetIndex ()).DomainOut())
|
|
outfile << "grp"<< dom2 <<".Add([ " << (int)sei+1 - nbDel << " ])" << std::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 << std::endl;
|
|
}
|
|
|
|
for (int i = 1; i <= ngMesh->GetNSeg(); i++)
|
|
{
|
|
const Segment & seg = ngMesh->LineSegment (i);
|
|
outfile << "mesh.AddEdge([ "
|
|
<< seg[0] << ", "
|
|
<< seg[1] << " ])" << std::endl;
|
|
}
|
|
|
|
#endif
|
|
|
|
std::cout << "Write " << pyFile << std::endl;
|
|
}
|
|
|
|
//================================================================================
|
|
/*!
|
|
* \brief Constructor of NETGENPlugin_ngMeshInfo
|
|
*/
|
|
//================================================================================
|
|
|
|
NETGENPlugin_ngMeshInfo::NETGENPlugin_ngMeshInfo( netgen::Mesh* ngMesh,
|
|
bool checkRemovedElems):
|
|
_elementsRemoved( false ), _copyOfLocalH(0)
|
|
{
|
|
if ( ngMesh )
|
|
{
|
|
_nbNodes = ngMesh->GetNP();
|
|
_nbSegments = ngMesh->GetNSeg();
|
|
_nbFaces = ngMesh->GetNSE();
|
|
_nbVolumes = ngMesh->GetNE();
|
|
|
|
if ( checkRemovedElems )
|
|
for ( int i = 1; i <= ngMesh->GetNSE() && !_elementsRemoved; ++i )
|
|
_elementsRemoved = ngMesh->SurfaceElement(i).IsDeleted();
|
|
}
|
|
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() )
|
|
NETGENPlugin_NetgenLibWrapper::CalcLocalH( toMesh );
|
|
|
|
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() ));
|
|
|
|
// edges
|
|
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();
|
|
const int nbNodes = f->NbCornerNodes();
|
|
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->NbCornerNodes();
|
|
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 Access to a counter of NETGENPlugin_NetgenLibWrapper instances
|
|
*/
|
|
//================================================================================
|
|
|
|
int& NETGENPlugin_NetgenLibWrapper::instanceCounter()
|
|
{
|
|
static int theCouner = 0;
|
|
return theCouner;
|
|
}
|
|
|
|
//================================================================================
|
|
/*!
|
|
* \brief Initialize netgen library
|
|
*/
|
|
//================================================================================
|
|
|
|
NETGENPlugin_NetgenLibWrapper::NETGENPlugin_NetgenLibWrapper():
|
|
_ngMesh(0)
|
|
{
|
|
if ( instanceCounter() == 0 )
|
|
{
|
|
Ng_Init();
|
|
if ( !netgen::testout )
|
|
netgen::testout = new ofstream( "test.out" );
|
|
}
|
|
|
|
++instanceCounter();
|
|
|
|
_isComputeOk = false;
|
|
_coutBuffer = NULL;
|
|
_ngcout = NULL;
|
|
_ngcerr = NULL;
|
|
if ( !getenv( "KEEP_NETGEN_OUTPUT" ))
|
|
{
|
|
setOutputFile(getOutputFileName());
|
|
}
|
|
|
|
setMesh( Ng_NewMesh() );
|
|
}
|
|
|
|
//================================================================================
|
|
/*!
|
|
* \brief Finish using netgen library
|
|
*/
|
|
//================================================================================
|
|
|
|
NETGENPlugin_NetgenLibWrapper::~NETGENPlugin_NetgenLibWrapper()
|
|
{
|
|
--instanceCounter();
|
|
|
|
Ng_DeleteMesh( ngMesh() );
|
|
Ng_Exit();
|
|
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 = (netgen::Mesh*) mesh;
|
|
}
|
|
|
|
//================================================================================
|
|
/*!
|
|
* \brief Perform a step of mesh generation
|
|
* \param [inout] occgeo - geometry to mesh
|
|
* \param [inout] startWith - start step
|
|
* \param [inout] endWith - end step
|
|
* \param [inout] ngMesh - netgen mesh
|
|
* \return int - is error
|
|
*/
|
|
//================================================================================
|
|
|
|
int NETGENPlugin_NetgenLibWrapper::GenerateMesh( netgen::OCCGeometry& occgeo,
|
|
int startWith, int endWith,
|
|
netgen::Mesh* & ngMesh )
|
|
{
|
|
int err = 0;
|
|
if ( !ngMesh )
|
|
ngMesh = new netgen::Mesh;
|
|
|
|
#ifdef NETGEN_V6
|
|
|
|
ngMesh->SetGeometry( shared_ptr<netgen::NetgenGeometry>( &occgeo, &NOOP_Deleter ));
|
|
|
|
netgen::mparam.perfstepsstart = startWith;
|
|
netgen::mparam.perfstepsend = endWith;
|
|
std::shared_ptr<netgen::Mesh> meshPtr( ngMesh, &NOOP_Deleter );
|
|
err = occgeo.GenerateMesh( meshPtr, netgen::mparam );
|
|
|
|
#else
|
|
#ifdef NETGEN_V5
|
|
|
|
err = netgen::OCCGenerateMesh(occgeo, ngMesh, netgen::mparam, startWith, endWith);
|
|
|
|
#else
|
|
|
|
char *optstr = 0;
|
|
err = netgen::OCCGenerateMesh(occgeo, ngMesh, startWith, endWith, optstr);
|
|
|
|
#endif
|
|
#endif
|
|
return err;
|
|
}
|
|
|
|
//================================================================================
|
|
/*!
|
|
* \brief Create a mesh size tree
|
|
*/
|
|
//================================================================================
|
|
|
|
void NETGENPlugin_NetgenLibWrapper::CalcLocalH( netgen::Mesh * ngMesh )
|
|
{
|
|
#if defined( NETGEN_V5 ) || defined( NETGEN_V6 )
|
|
ngMesh->CalcLocalH(netgen::mparam.grading);
|
|
#else
|
|
ngMesh->CalcLocalH();
|
|
#endif
|
|
}
|
|
|
|
//================================================================================
|
|
/*!
|
|
* \brief Return a unique file name
|
|
*/
|
|
//================================================================================
|
|
|
|
std::string NETGENPlugin_NetgenLibWrapper::getOutputFileName()
|
|
{
|
|
std::string aTmpDir = SALOMEDS_Tool::GetTmpDir();
|
|
|
|
TCollection_AsciiString aGenericName = 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 Set output file name for netgen log
|
|
*/
|
|
//================================================================================
|
|
|
|
void NETGENPlugin_NetgenLibWrapper::setOutputFile(std::string outputfile)
|
|
{
|
|
// redirect all netgen output (mycout,myerr,cout) to _outputFileName
|
|
_outputFileName = outputfile;
|
|
_ngcout = netgen::mycout;
|
|
_ngcerr = netgen::myerr;
|
|
netgen::mycout = new ofstream ( _outputFileName.c_str() );
|
|
netgen::myerr = netgen::mycout;
|
|
_coutBuffer = std::cout.rdbuf();
|
|
#ifdef _DEBUG_
|
|
std::cout << "NOTE: netgen output is redirected to file " << _outputFileName << std::endl;
|
|
#else
|
|
std::cout.rdbuf( netgen::mycout->rdbuf() );
|
|
#endif
|
|
}
|
|
|
|
//================================================================================
|
|
/*!
|
|
* \brief Remove "test.out" and "problemfaces" files in current directory
|
|
*/
|
|
//================================================================================
|
|
|
|
void NETGENPlugin_NetgenLibWrapper::RemoveTmpFiles()
|
|
{
|
|
bool rm = SMESH_File("test.out").remove() ;
|
|
#ifndef WIN32
|
|
if ( rm && netgen::testout && instanceCounter() == 0 )
|
|
{
|
|
delete netgen::testout;
|
|
netgen::testout = 0;
|
|
}
|
|
#endif
|
|
SMESH_File("problemfaces").remove();
|
|
SMESH_File("occmesh.rep").remove();
|
|
}
|
|
|
|
//================================================================================
|
|
/*!
|
|
* \brief Remove file with netgen output
|
|
*/
|
|
//================================================================================
|
|
|
|
void NETGENPlugin_NetgenLibWrapper::removeOutputFile()
|
|
{
|
|
if ( !_outputFileName.empty() )
|
|
{
|
|
if ( _ngcout )
|
|
{
|
|
delete netgen::mycout;
|
|
netgen::mycout = _ngcout;
|
|
netgen::myerr = _ngcerr;
|
|
_ngcout = 0;
|
|
}
|
|
string tmpDir = SALOMEDS_Tool::GetDirFromPath ( _outputFileName );
|
|
string aFileName = SALOMEDS_Tool::GetNameFromPath( _outputFileName ) + ".out";
|
|
SALOMEDS_Tool::ListOfFiles aFiles;
|
|
aFiles.reserve(1);
|
|
aFiles.push_back(aFileName.c_str());
|
|
|
|
SALOMEDS_Tool::RemoveTemporaryFiles( tmpDir.c_str(), aFiles, true );
|
|
}
|
|
}
|