1 // Copyright (C) 2007-2022 CEA/DEN, EDF R&D, OPEN CASCADE
3 // Copyright (C) 2003-2007 OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
4 // CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS
6 // This library is free software; you can redistribute it and/or
7 // modify it under the terms of the GNU Lesser General Public
8 // License as published by the Free Software Foundation; either
9 // version 2.1 of the License, or (at your option) any later version.
11 // This library is distributed in the hope that it will be useful,
12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 // Lesser General Public License for more details.
16 // You should have received a copy of the GNU Lesser General Public
17 // License along with this library; if not, write to the Free Software
18 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 // See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
23 // NETGENPlugin : C++ implementation
24 // File : NETGENPlugin_Mesher.hxx
25 // Author : Michael Sazonov (OCN)
29 #ifndef _NETGENPlugin_Mesher_HXX_
30 #define _NETGENPlugin_Mesher_HXX_
32 #include "NETGENPlugin_Defs.hxx"
34 #include <StdMeshers_FaceSide.hxx>
35 #include <SMDS_MeshElement.hxx>
36 #include <SMESH_Algo.hxx>
37 #include <SMESH_ProxyMesh.hxx>
39 #include <TopTools_IndexedMapOfShape.hxx>
49 class NETGENPlugin_Hypothesis;
50 class NETGENPlugin_Internals;
51 class NETGENPlugin_SimpleHypothesis_2D;
55 class SMESH_MesherHelper;
56 class StdMeshers_ViscousLayers;
62 //=============================================================================
64 * \brief Struct storing nb of entities in netgen mesh
66 //=============================================================================
68 struct NETGENPlugin_ngMeshInfo
70 int _nbNodes, _nbSegments, _nbFaces, _nbVolumes;
71 bool _elementsRemoved; // case where netgen can remove free nodes
73 NETGENPlugin_ngMeshInfo( netgen::Mesh* ngMesh=0, bool checkRemovedElems=false );
74 void transferLocalH( netgen::Mesh* fromMesh, netgen::Mesh* toMesh );
75 void restoreLocalH ( netgen::Mesh* ngMesh);
78 //================================================================================
80 * \brief It correctly initializes netgen library at constructor and
81 * correctly finishes using netgen library at destructor
83 //================================================================================
85 struct NETGENPLUGIN_EXPORT NETGENPlugin_NetgenLibWrapper
88 netgen::Mesh * _ngMesh;
90 NETGENPlugin_NetgenLibWrapper();
91 ~NETGENPlugin_NetgenLibWrapper();
92 void setMesh( nglib::Ng_Mesh* mesh );
93 nglib::Ng_Mesh* ngMesh() { return (nglib::Ng_Mesh*)(void*)_ngMesh; }
97 static int GenerateMesh(netgen::OCCGeometry& occgeo, int startWith, int endWith,
98 netgen::Mesh* & ngMesh);
99 int GenerateMesh(netgen::OCCGeometry& occgeo, int startWith, int endWith )
101 return GenerateMesh( occgeo, startWith, endWith, _ngMesh );
104 static void CalcLocalH( netgen::Mesh * ngMesh );
106 static void RemoveTmpFiles();
107 static int& instanceCounter();
110 std::string getOutputFileName();
111 void removeOutputFile();
112 std::string _outputFileName;
116 std::streambuf* _coutBuffer; // to re-/store cout.rdbuf()
119 //=============================================================================
121 * \brief This class calls the NETGEN mesher of OCC geometry
123 //=============================================================================
125 class NETGENPLUGIN_EXPORT NETGENPlugin_Mesher
128 // ---------- PUBLIC METHODS ----------
130 NETGENPlugin_Mesher (SMESH_Mesh* mesh, const TopoDS_Shape& aShape,
131 const bool isVolume);
132 ~NETGENPlugin_Mesher();
133 void SetSelfPointer( NETGENPlugin_Mesher ** ptr );
135 void SetParameters(const NETGENPlugin_Hypothesis* hyp);
136 void SetParameters(const NETGENPlugin_SimpleHypothesis_2D* hyp);
137 void SetParameters(const StdMeshers_ViscousLayers* hyp );
138 void SetViscousLayers2DAssigned(bool isAssigned) { _isViscousLayers2D = isAssigned; }
140 void SetLocalSizeForChordalError( netgen::OCCGeometry& occgeo, netgen::Mesh& ngMesh );
141 static void SetLocalSize( netgen::OCCGeometry& occgeo, netgen::Mesh& ngMesh );
145 bool Evaluate(MapShapeNbElems& aResMap);
147 double GetProgress(const SMESH_Algo* holder,
148 const int * algoProgressTic,
149 const double * algoProgress) const;
151 static void PrepareOCCgeometry(netgen::OCCGeometry& occgeom,
152 const TopoDS_Shape& shape,
154 std::list< SMESH_subMesh* > * meshedSM=0,
155 NETGENPlugin_Internals* internalShapes=0);
157 static double GetDefaultMinSize(const TopoDS_Shape& shape,
158 const double maxSize);
160 static void RestrictLocalSize(netgen::Mesh& ngMesh,
163 const bool overrideMinH=true);
165 static int FillSMesh(const netgen::OCCGeometry& occgeom,
166 netgen::Mesh& ngMesh,
167 const NETGENPlugin_ngMeshInfo& initState,
169 std::vector<const SMDS_MeshNode*>& nodeVec,
170 SMESH_Comment& comment,
171 SMESH_MesherHelper* quadHelper=0);
173 bool FillNgMesh(netgen::OCCGeometry& occgeom,
174 netgen::Mesh& ngMesh,
175 std::vector<const SMDS_MeshNode*>& nodeVec,
176 const std::list< SMESH_subMesh* > & meshedSM,
177 SMESH_MesherHelper* quadHelper=0,
178 SMESH_ProxyMesh::Ptr proxyMesh=SMESH_ProxyMesh::Ptr());
180 static void FixIntFaces(const netgen::OCCGeometry& occgeom,
181 netgen::Mesh& ngMesh,
182 NETGENPlugin_Internals& internalShapes);
184 static bool FixFaceMesh(const netgen::OCCGeometry& occgeom,
185 netgen::Mesh& ngMesh,
188 static void AddIntVerticesInFaces(const netgen::OCCGeometry& occgeom,
189 netgen::Mesh& ngMesh,
190 std::vector<const SMDS_MeshNode*>& nodeVec,
191 NETGENPlugin_Internals& internalShapes);
193 static void AddIntVerticesInSolids(const netgen::OCCGeometry& occgeom,
194 netgen::Mesh& ngMesh,
195 std::vector<const SMDS_MeshNode*>& nodeVec,
196 NETGENPlugin_Internals& internalShapes);
198 static SMESH_ComputeErrorPtr
199 AddSegmentsToMesh(netgen::Mesh& ngMesh,
200 netgen::OCCGeometry& geom,
201 const TSideVector& wires,
202 SMESH_MesherHelper& helper,
203 std::vector< const SMDS_MeshNode* > & nodeVec,
204 const bool overrideMinH=true);
206 void SetDefaultParameters();
208 static SMESH_ComputeErrorPtr ReadErrors(const std::vector< const SMDS_MeshNode* >& nodeVec);
211 static void toPython( const netgen::Mesh* ngMesh ); // debug
216 const TopoDS_Shape& _shape;
220 bool _isViscousLayers2D;
221 double _chordalError;
222 netgen::Mesh* _ngMesh;
223 netgen::OCCGeometry* _occgeom;
226 volatile int _progressTic;
227 volatile double _ticTime; // normalized [0,1] compute time per a SMESH_Algo::_progressTic
228 volatile double _totalTime;
230 const NETGENPlugin_SimpleHypothesis_2D * _simpleHyp;
231 const StdMeshers_ViscousLayers* _viscousLayersHyp;
233 // a pointer to NETGENPlugin_Mesher* field of the holder, that will be
234 // nullified at destruction of this
235 NETGENPlugin_Mesher ** _ptrToMe;
238 //=============================================================================
240 * \brief Container of info needed to solve problems with internal shapes.
242 * Issue 0020676. It is made up as a class to be ready to extract from NETGEN
243 * and put in SMESH as soon as the same solution is needed somewhere else.
244 * The approach is to precompute internal edges in 2D and internal faces in 3D
245 * and put their mesh correctly (twice) into netgen mesh.
246 * In 2D, this class finds internal edges in faces and their vertices.
247 * In 3D, it additionally finds internal faces, their edges shared with other faces,
248 * and their vertices shared by several internal edges. Nodes built on the found
249 * shapes and mesh faces built on the found internal faces are to be doubled in
250 * netgen mesh to emulate a "crack"
252 * For internal faces a more simple solution is found, which is just to duplicate
253 * mesh faces on internal geom faces without modeling a "real crack". For this
254 * reason findBorderElements() is no more used anywhere.
256 //=============================================================================
258 class NETGENPLUGIN_EXPORT NETGENPlugin_Internals
263 std::map<int,int> _e2face;//!<edges and their vertices in faces where they are TopAbs_INTERNAL
264 std::map<int,std::list<int> > _f2v;//!<faces with internal vertices
266 std::set<int> _intShapes;
267 std::set<int> _borderFaces; //!< non-internal faces sharing the internal edge
268 std::map<int,std::list<int> > _s2v;//!<solids with internal vertices
271 NETGENPlugin_Internals( SMESH_Mesh& mesh, const TopoDS_Shape& shape, bool is3D );
273 SMESH_Mesh& getMesh() const;
275 bool isShapeToPrecompute(const TopoDS_Shape& s);
279 bool hasInternalEdges() const { return !_e2face.empty(); }
280 bool isInternalEdge( int id ) const { return _e2face.count( id ); }
281 const std::map<int,int>& getEdgesAndVerticesWithFaces() const { return _e2face; }
282 void getInternalEdges( TopTools_IndexedMapOfShape& fmap,
283 TopTools_IndexedMapOfShape& emap,
284 TopTools_IndexedMapOfShape& vmap,
285 std::list< SMESH_subMesh* > smToPrecompute[]);
287 bool hasInternalVertexInFace() const { return !_f2v.empty(); }
288 const std::map<int,std::list<int> >& getFacesWithVertices() const { return _f2v; }
292 bool hasInternalFaces() const { return !_intShapes.empty(); }
293 bool isInternalShape( int id ) const { return _intShapes.count( id ); }
294 void findBorderElements( std::set< const SMDS_MeshElement*, TIDCompare > & borderElems );
295 bool isBorderFace( int faceID ) const { return _borderFaces.count( faceID ); }
296 void getInternalFaces( TopTools_IndexedMapOfShape& fmap,
297 TopTools_IndexedMapOfShape& emap,
298 std::list< SMESH_subMesh* >& facesSM,
299 std::list< SMESH_subMesh* >& boundarySM);
301 bool hasInternalVertexInSolid() const { return !_s2v.empty(); }
302 bool hasInternalVertexInSolid(int soID ) const { return _s2v.count(soID); }
303 const std::map<int,std::list<int> >& getSolidsWithVertices() const { return _s2v; }