306 lines
12 KiB
C++
306 lines
12 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.hxx
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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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#ifndef _NETGENPlugin_Mesher_HXX_
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#define _NETGENPlugin_Mesher_HXX_
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#include "NETGENPlugin_Defs.hxx"
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#include <StdMeshers_FaceSide.hxx>
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#include <SMDS_MeshElement.hxx>
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#include <SMESH_Algo.hxx>
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#include <SMESH_ProxyMesh.hxx>
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#include <TopTools_IndexedMapOfShape.hxx>
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namespace nglib {
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#include <nglib.h>
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}
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#include <map>
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#include <vector>
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#include <set>
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class NETGENPlugin_Hypothesis;
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class NETGENPlugin_Internals;
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class NETGENPlugin_SimpleHypothesis_2D;
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class SMESHDS_Mesh;
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class SMESH_Comment;
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class SMESH_Mesh;
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class SMESH_MesherHelper;
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class StdMeshers_ViscousLayers;
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class TopoDS_Shape;
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namespace netgen {
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class OCCGeometry;
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class Mesh;
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}
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//=============================================================================
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/*!
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* \brief Struct storing nb of entities in netgen mesh
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*/
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//=============================================================================
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struct NETGENPlugin_ngMeshInfo
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{
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int _nbNodes, _nbSegments, _nbFaces, _nbVolumes;
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bool _elementsRemoved; // case where netgen can remove free nodes
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char* _copyOfLocalH;
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NETGENPlugin_ngMeshInfo( netgen::Mesh* ngMesh=0, bool checkRemovedElems=false );
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void transferLocalH( netgen::Mesh* fromMesh, netgen::Mesh* toMesh );
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void restoreLocalH ( netgen::Mesh* ngMesh);
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};
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//================================================================================
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/*!
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* \brief It correctly initializes netgen library at constructor and
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* correctly finishes using netgen library at destructor
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*/
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//================================================================================
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struct NETGENPLUGIN_EXPORT NETGENPlugin_NetgenLibWrapper
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{
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bool _isComputeOk;
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netgen::Mesh * _ngMesh;
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NETGENPlugin_NetgenLibWrapper();
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~NETGENPlugin_NetgenLibWrapper();
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void setMesh( nglib::Ng_Mesh* mesh );
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nglib::Ng_Mesh* ngMesh() { return (nglib::Ng_Mesh*)(void*)_ngMesh; }
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static int GenerateMesh(netgen::OCCGeometry& occgeo, int startWith, int endWith,
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netgen::Mesh* & ngMesh);
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int GenerateMesh(netgen::OCCGeometry& occgeo, int startWith, int endWith )
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{
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return GenerateMesh( occgeo, startWith, endWith, _ngMesh );
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}
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static void CalcLocalH( netgen::Mesh * ngMesh );
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static void RemoveTmpFiles();
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static int& instanceCounter();
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private:
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std::string getOutputFileName();
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void removeOutputFile();
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std::string _outputFileName;
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ostream * _ngcout;
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ostream * _ngcerr;
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std::streambuf* _coutBuffer; // to re-/store cout.rdbuf()
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};
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//=============================================================================
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/*!
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* \brief This class calls the NETGEN mesher of OCC geometry
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*/
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//=============================================================================
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class NETGENPLUGIN_EXPORT NETGENPlugin_Mesher
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{
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public:
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// ---------- PUBLIC METHODS ----------
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NETGENPlugin_Mesher (SMESH_Mesh* mesh, const TopoDS_Shape& aShape,
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const bool isVolume);
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~NETGENPlugin_Mesher();
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void SetSelfPointer( NETGENPlugin_Mesher ** ptr );
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void SetParameters(const NETGENPlugin_Hypothesis* hyp);
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void SetParameters(const NETGENPlugin_SimpleHypothesis_2D* hyp);
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void SetParameters(const StdMeshers_ViscousLayers* hyp );
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void SetViscousLayers2DAssigned(bool isAssigned) { _isViscousLayers2D = isAssigned; }
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void SetLocalSizeForChordalError( netgen::OCCGeometry& occgeo, netgen::Mesh& ngMesh );
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static void SetLocalSize( netgen::OCCGeometry& occgeo, netgen::Mesh& ngMesh );
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bool Compute();
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bool Evaluate(MapShapeNbElems& aResMap);
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double GetProgress(const SMESH_Algo* holder,
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const int * algoProgressTic,
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const double * algoProgress) const;
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static void PrepareOCCgeometry(netgen::OCCGeometry& occgeom,
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const TopoDS_Shape& shape,
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SMESH_Mesh& mesh,
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std::list< SMESH_subMesh* > * meshedSM=0,
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NETGENPlugin_Internals* internalShapes=0);
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static double GetDefaultMinSize(const TopoDS_Shape& shape,
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const double maxSize);
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static void RestrictLocalSize(netgen::Mesh& ngMesh,
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const gp_XYZ& p,
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double size,
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const bool overrideMinH=true);
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static int FillSMesh(const netgen::OCCGeometry& occgeom,
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netgen::Mesh& ngMesh,
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const NETGENPlugin_ngMeshInfo& initState,
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SMESH_Mesh& sMesh,
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std::vector<const SMDS_MeshNode*>& nodeVec,
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SMESH_Comment& comment,
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SMESH_MesherHelper* quadHelper=0);
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bool FillNgMesh(netgen::OCCGeometry& occgeom,
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netgen::Mesh& ngMesh,
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std::vector<const SMDS_MeshNode*>& nodeVec,
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const std::list< SMESH_subMesh* > & meshedSM,
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SMESH_MesherHelper* quadHelper=0,
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SMESH_ProxyMesh::Ptr proxyMesh=SMESH_ProxyMesh::Ptr());
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static void FixIntFaces(const netgen::OCCGeometry& occgeom,
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netgen::Mesh& ngMesh,
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NETGENPlugin_Internals& internalShapes);
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static bool FixFaceMesh(const netgen::OCCGeometry& occgeom,
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netgen::Mesh& ngMesh,
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const int faceID);
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static void AddIntVerticesInFaces(const netgen::OCCGeometry& occgeom,
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netgen::Mesh& ngMesh,
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std::vector<const SMDS_MeshNode*>& nodeVec,
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NETGENPlugin_Internals& internalShapes);
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static void AddIntVerticesInSolids(const netgen::OCCGeometry& occgeom,
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netgen::Mesh& ngMesh,
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std::vector<const SMDS_MeshNode*>& nodeVec,
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NETGENPlugin_Internals& internalShapes);
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static SMESH_ComputeErrorPtr
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AddSegmentsToMesh(netgen::Mesh& ngMesh,
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netgen::OCCGeometry& geom,
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const TSideVector& wires,
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SMESH_MesherHelper& helper,
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std::vector< const SMDS_MeshNode* > & nodeVec,
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const bool overrideMinH=true);
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void SetDefaultParameters();
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static SMESH_ComputeErrorPtr ReadErrors(const std::vector< const SMDS_MeshNode* >& nodeVec);
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static void toPython( const netgen::Mesh* ngMesh ); // debug
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private:
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SMESH_Mesh* _mesh;
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const TopoDS_Shape& _shape;
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bool _isVolume;
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bool _optimize;
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int _fineness;
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bool _isViscousLayers2D;
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double _chordalError;
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netgen::Mesh* _ngMesh;
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netgen::OCCGeometry* _occgeom;
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int _curShapeIndex;
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volatile int _progressTic;
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volatile double _ticTime; // normalized [0,1] compute time per a SMESH_Algo::_progressTic
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volatile double _totalTime;
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const NETGENPlugin_SimpleHypothesis_2D * _simpleHyp;
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const StdMeshers_ViscousLayers* _viscousLayersHyp;
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// a pointer to NETGENPlugin_Mesher* field of the holder, that will be
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// nullified at destruction of this
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NETGENPlugin_Mesher ** _ptrToMe;
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};
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//=============================================================================
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/*!
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* \brief Container of info needed to solve problems with internal shapes.
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*
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* Issue 0020676. It is made up as a class to be ready to extract from NETGEN
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* and put in SMESH as soon as the same solution is needed somewhere else.
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* The approach is to precompute internal edges in 2D and internal faces in 3D
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* and put their mesh correctly (twice) into netgen mesh.
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* In 2D, this class finds internal edges in faces and their vertices.
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* In 3D, it additionally finds internal faces, their edges shared with other faces,
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* and their vertices shared by several internal edges. Nodes built on the found
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* shapes and mesh faces built on the found internal faces are to be doubled in
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* netgen mesh to emulate a "crack"
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*
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* For internal faces a more simple solution is found, which is just to duplicate
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* mesh faces on internal geom faces without modeling a "real crack". For this
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* reason findBorderElements() is no more used anywhere.
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*/
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//=============================================================================
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class NETGENPLUGIN_EXPORT NETGENPlugin_Internals
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{
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SMESH_Mesh& _mesh;
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bool _is3D;
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//2D
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std::map<int,int> _e2face;//!<edges and their vertices in faces where they are TopAbs_INTERNAL
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std::map<int,std::list<int> > _f2v;//!<faces with internal vertices
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// 3D
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std::set<int> _intShapes;
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std::set<int> _borderFaces; //!< non-internal faces sharing the internal edge
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std::map<int,std::list<int> > _s2v;//!<solids with internal vertices
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public:
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NETGENPlugin_Internals( SMESH_Mesh& mesh, const TopoDS_Shape& shape, bool is3D );
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SMESH_Mesh& getMesh() const;
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bool isShapeToPrecompute(const TopoDS_Shape& s);
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// 2D meshing
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// edges
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bool hasInternalEdges() const { return !_e2face.empty(); }
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bool isInternalEdge( int id ) const { return _e2face.count( id ); }
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const std::map<int,int>& getEdgesAndVerticesWithFaces() const { return _e2face; }
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void getInternalEdges( TopTools_IndexedMapOfShape& fmap,
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TopTools_IndexedMapOfShape& emap,
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TopTools_IndexedMapOfShape& vmap,
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std::list< SMESH_subMesh* > smToPrecompute[]);
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// vertices
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bool hasInternalVertexInFace() const { return !_f2v.empty(); }
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const std::map<int,std::list<int> >& getFacesWithVertices() const { return _f2v; }
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// 3D meshing
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// faces
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bool hasInternalFaces() const { return !_intShapes.empty(); }
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bool isInternalShape( int id ) const { return _intShapes.count( id ); }
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void findBorderElements( std::set< const SMDS_MeshElement*, TIDCompare > & borderElems );
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bool isBorderFace( int faceID ) const { return _borderFaces.count( faceID ); }
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void getInternalFaces( TopTools_IndexedMapOfShape& fmap,
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TopTools_IndexedMapOfShape& emap,
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std::list< SMESH_subMesh* >& facesSM,
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std::list< SMESH_subMesh* >& boundarySM);
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// vertices
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bool hasInternalVertexInSolid() const { return !_s2v.empty(); }
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bool hasInternalVertexInSolid(int soID ) const { return _s2v.count(soID); }
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const std::map<int,std::list<int> >& getSolidsWithVertices() const { return _s2v; }
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};
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#endif
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