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>
38 #include <SALOMEDS_Tool.hxx>
40 #include <TopTools_IndexedMapOfShape.hxx>
50 class NETGENPlugin_Hypothesis;
51 class NETGENPlugin_Internals;
52 class NETGENPlugin_SimpleHypothesis_2D;
56 class SMESH_MesherHelper;
57 class StdMeshers_ViscousLayers;
64 // Class for temporary folder switching
69 ChdirRAII(const std::string& wd):_wd(wd) { if(_wd.empty()) return ; char *pwd(get_current_dir_name()); _od = pwd; free(pwd); chdir(_wd.c_str()); }
70 ~ChdirRAII() { if(_od.empty()) return ; chdir(_od.c_str()); }
72 ChdirRAII(const std::string& wd) : _wd(wd) {
76 GetCurrentDirectory(sizeof(pwd), pwd);
77 _od = Kernel_Utils::utf8_encode_s(pwd);
78 SetCurrentDirectory(Kernel_Utils::utf8_decode_s(_wd).c_str());
81 if (_od.empty()) return;
82 SetCurrentDirectory(Kernel_Utils::utf8_decode_s(_od).c_str());
89 //=============================================================================
91 * \brief Struct storing nb of entities in netgen mesh
93 //=============================================================================
95 struct NETGENPlugin_ngMeshInfo
97 int _nbNodes, _nbSegments, _nbFaces, _nbVolumes;
98 bool _elementsRemoved; // case where netgen can remove free nodes
100 NETGENPlugin_ngMeshInfo( netgen::Mesh* ngMesh=0, bool checkRemovedElems=false );
101 void transferLocalH( netgen::Mesh* fromMesh, netgen::Mesh* toMesh );
102 void restoreLocalH ( netgen::Mesh* ngMesh);
105 //================================================================================
107 * \brief It correctly initializes netgen library at constructor and
108 * correctly finishes using netgen library at destructor
110 //================================================================================
112 struct NETGENPLUGIN_EXPORT NETGENPlugin_NetgenLibWrapper
115 netgen::Mesh * _ngMesh;
117 NETGENPlugin_NetgenLibWrapper();
118 ~NETGENPlugin_NetgenLibWrapper();
119 void setMesh( nglib::Ng_Mesh* mesh );
120 nglib::Ng_Mesh* ngMesh() { return (nglib::Ng_Mesh*)(void*)_ngMesh; }
124 static int GenerateMesh(netgen::OCCGeometry& occgeo, int startWith, int endWith,
125 netgen::Mesh* & ngMesh);
126 int GenerateMesh(netgen::OCCGeometry& occgeo, int startWith, int endWith )
128 return GenerateMesh( occgeo, startWith, endWith, _ngMesh );
131 static void CalcLocalH( netgen::Mesh * ngMesh );
133 static void RemoveTmpFiles();
134 static int& instanceCounter();
135 void setOutputFile(std::string);
138 std::string getOutputFileName();
139 void removeOutputFile();
140 std::string _outputFileName;
141 // This will change current directory when the class is instanciated and switch
147 std::streambuf* _coutBuffer; // to re-/store cout.rdbuf()
150 //=============================================================================
152 * \brief This class calls the NETGEN mesher of OCC geometry
154 //=============================================================================
156 class NETGENPLUGIN_EXPORT NETGENPlugin_Mesher
159 // ---------- PUBLIC METHODS ----------
161 NETGENPlugin_Mesher (SMESH_Mesh* mesh, const TopoDS_Shape& aShape,
162 const bool isVolume);
163 ~NETGENPlugin_Mesher();
164 void SetSelfPointer( NETGENPlugin_Mesher ** ptr );
166 void SetParameters(const NETGENPlugin_Hypothesis* hyp);
167 void SetParameters(const NETGENPlugin_SimpleHypothesis_2D* hyp);
168 void SetParameters(const StdMeshers_ViscousLayers* hyp );
169 void SetViscousLayers2DAssigned(bool isAssigned) { _isViscousLayers2D = isAssigned; }
171 void SetLocalSizeForChordalError( netgen::OCCGeometry& occgeo, netgen::Mesh& ngMesh );
172 static void SetLocalSize( netgen::OCCGeometry& occgeo, netgen::Mesh& ngMesh );
176 bool Evaluate(MapShapeNbElems& aResMap);
178 double GetProgress(const SMESH_Algo* holder,
179 const int * algoProgressTic,
180 const double * algoProgress) const;
182 static void PrepareOCCgeometry(netgen::OCCGeometry& occgeom,
183 const TopoDS_Shape& shape,
185 std::list< SMESH_subMesh* > * meshedSM=0,
186 NETGENPlugin_Internals* internalShapes=0);
188 static double GetDefaultMinSize(const TopoDS_Shape& shape,
189 const double maxSize);
191 static void RestrictLocalSize(netgen::Mesh& ngMesh,
194 const bool overrideMinH=true);
196 static int FillSMesh(const netgen::OCCGeometry& occgeom,
197 netgen::Mesh& ngMesh,
198 const NETGENPlugin_ngMeshInfo& initState,
200 std::vector<const SMDS_MeshNode*>& nodeVec,
201 SMESH_Comment& comment,
202 SMESH_MesherHelper* quadHelper=0);
204 bool FillNgMesh(netgen::OCCGeometry& occgeom,
205 netgen::Mesh& ngMesh,
206 std::vector<const SMDS_MeshNode*>& nodeVec,
207 const std::list< SMESH_subMesh* > & meshedSM,
208 SMESH_MesherHelper* quadHelper=0,
209 SMESH_ProxyMesh::Ptr proxyMesh=SMESH_ProxyMesh::Ptr());
211 static void FixIntFaces(const netgen::OCCGeometry& occgeom,
212 netgen::Mesh& ngMesh,
213 NETGENPlugin_Internals& internalShapes);
215 static bool FixFaceMesh(const netgen::OCCGeometry& occgeom,
216 netgen::Mesh& ngMesh,
219 static void AddIntVerticesInFaces(const netgen::OCCGeometry& occgeom,
220 netgen::Mesh& ngMesh,
221 std::vector<const SMDS_MeshNode*>& nodeVec,
222 NETGENPlugin_Internals& internalShapes);
224 static void AddIntVerticesInSolids(const netgen::OCCGeometry& occgeom,
225 netgen::Mesh& ngMesh,
226 std::vector<const SMDS_MeshNode*>& nodeVec,
227 NETGENPlugin_Internals& internalShapes);
229 static SMESH_ComputeErrorPtr
230 AddSegmentsToMesh(netgen::Mesh& ngMesh,
231 netgen::OCCGeometry& geom,
232 const TSideVector& wires,
233 SMESH_MesherHelper& helper,
234 std::vector< const SMDS_MeshNode* > & nodeVec,
235 const bool overrideMinH=true);
237 void SetDefaultParameters();
239 static SMESH_ComputeErrorPtr ReadErrors(const std::vector< const SMDS_MeshNode* >& nodeVec);
242 static void toPython( const netgen::Mesh* ngMesh ); // debug
247 const TopoDS_Shape& _shape;
251 bool _isViscousLayers2D;
252 double _chordalError;
253 netgen::Mesh* _ngMesh;
254 netgen::OCCGeometry* _occgeom;
257 volatile int _progressTic;
258 volatile double _ticTime; // normalized [0,1] compute time per a SMESH_Algo::_progressTic
259 volatile double _totalTime;
261 const NETGENPlugin_SimpleHypothesis_2D * _simpleHyp;
262 const StdMeshers_ViscousLayers* _viscousLayersHyp;
264 // a pointer to NETGENPlugin_Mesher* field of the holder, that will be
265 // nullified at destruction of this
266 NETGENPlugin_Mesher ** _ptrToMe;
269 //=============================================================================
271 * \brief Container of info needed to solve problems with internal shapes.
273 * Issue 0020676. It is made up as a class to be ready to extract from NETGEN
274 * and put in SMESH as soon as the same solution is needed somewhere else.
275 * The approach is to precompute internal edges in 2D and internal faces in 3D
276 * and put their mesh correctly (twice) into netgen mesh.
277 * In 2D, this class finds internal edges in faces and their vertices.
278 * In 3D, it additionally finds internal faces, their edges shared with other faces,
279 * and their vertices shared by several internal edges. Nodes built on the found
280 * shapes and mesh faces built on the found internal faces are to be doubled in
281 * netgen mesh to emulate a "crack"
283 * For internal faces a more simple solution is found, which is just to duplicate
284 * mesh faces on internal geom faces without modeling a "real crack". For this
285 * reason findBorderElements() is no more used anywhere.
287 //=============================================================================
289 class NETGENPLUGIN_EXPORT NETGENPlugin_Internals
294 std::map<int,int> _e2face;//!<edges and their vertices in faces where they are TopAbs_INTERNAL
295 std::map<int,std::list<int> > _f2v;//!<faces with internal vertices
297 std::set<int> _intShapes;
298 std::set<int> _borderFaces; //!< non-internal faces sharing the internal edge
299 std::map<int,std::list<int> > _s2v;//!<solids with internal vertices
302 NETGENPlugin_Internals( SMESH_Mesh& mesh, const TopoDS_Shape& shape, bool is3D );
304 SMESH_Mesh& getMesh() const;
306 bool isShapeToPrecompute(const TopoDS_Shape& s);
310 bool hasInternalEdges() const { return !_e2face.empty(); }
311 bool isInternalEdge( int id ) const { return _e2face.count( id ); }
312 const std::map<int,int>& getEdgesAndVerticesWithFaces() const { return _e2face; }
313 void getInternalEdges( TopTools_IndexedMapOfShape& fmap,
314 TopTools_IndexedMapOfShape& emap,
315 TopTools_IndexedMapOfShape& vmap,
316 std::list< SMESH_subMesh* > smToPrecompute[]);
318 bool hasInternalVertexInFace() const { return !_f2v.empty(); }
319 const std::map<int,std::list<int> >& getFacesWithVertices() const { return _f2v; }
323 bool hasInternalFaces() const { return !_intShapes.empty(); }
324 bool isInternalShape( int id ) const { return _intShapes.count( id ); }
325 void findBorderElements( std::set< const SMDS_MeshElement*, TIDCompare > & borderElems );
326 bool isBorderFace( int faceID ) const { return _borderFaces.count( faceID ); }
327 void getInternalFaces( TopTools_IndexedMapOfShape& fmap,
328 TopTools_IndexedMapOfShape& emap,
329 std::list< SMESH_subMesh* >& facesSM,
330 std::list< SMESH_subMesh* >& boundarySM);
332 bool hasInternalVertexInSolid() const { return !_s2v.empty(); }
333 bool hasInternalVertexInSolid(int soID ) const { return _s2v.count(soID); }
334 const std::map<int,std::list<int> >& getSolidsWithVertices() const { return _s2v; }