1 // Copyright (C) 2007-2023 CEA, EDF, 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>
39 #include "Basics_Utils.hxx"
40 #include "SALOME_Basics.hxx"
41 #include <TopTools_IndexedMapOfShape.hxx>
51 class NETGENPlugin_Hypothesis;
52 class NETGENPlugin_Internals;
53 class NETGENPlugin_SimpleHypothesis_2D;
57 class SMESH_MesherHelper;
58 class StdMeshers_ViscousLayers;
65 // Class for temporary folder switching
70 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()); }
71 ~ChdirRAII() { if(_od.empty()) return ; chdir(_od.c_str()); }
73 ChdirRAII(const std::string& wd) : _wd(wd) {
77 GetCurrentDirectory(sizeof(pwd), pwd);
78 _od = Kernel_Utils::utf8_encode_s(pwd);
79 SetCurrentDirectory(Kernel_Utils::utf8_decode_s(_wd).c_str());
82 if (_od.empty()) return;
83 SetCurrentDirectory(Kernel_Utils::utf8_decode_s(_od).c_str());
90 //=============================================================================
92 * \brief Struct storing nb of entities in netgen mesh
94 //=============================================================================
96 struct NETGENPlugin_ngMeshInfo
98 int _nbNodes, _nbSegments, _nbFaces, _nbVolumes;
99 bool _elementsRemoved; // case where netgen can remove free nodes
101 NETGENPlugin_ngMeshInfo( netgen::Mesh* ngMesh=0, bool checkRemovedElems=false );
102 void transferLocalH( netgen::Mesh* fromMesh, netgen::Mesh* toMesh );
103 void restoreLocalH ( netgen::Mesh* ngMesh);
106 //================================================================================
108 * \brief It correctly initializes netgen library at constructor and
109 * correctly finishes using netgen library at destructor
111 //================================================================================
113 struct NETGENPLUGIN_EXPORT NETGENPlugin_NetgenLibWrapper
116 netgen::Mesh * _ngMesh;
118 NETGENPlugin_NetgenLibWrapper();
119 ~NETGENPlugin_NetgenLibWrapper();
120 void setMesh( nglib::Ng_Mesh* mesh );
121 nglib::Ng_Mesh* ngMesh() { return (nglib::Ng_Mesh*)(void*)_ngMesh; }
125 static int GenerateMesh(netgen::OCCGeometry& occgeo, int startWith, int endWith,
126 netgen::Mesh* & ngMesh);
127 int GenerateMesh(netgen::OCCGeometry& occgeo, int startWith, int endWith )
129 return GenerateMesh( occgeo, startWith, endWith, _ngMesh );
132 static void CalcLocalH( netgen::Mesh * ngMesh );
134 static void RemoveTmpFiles();
135 static int& instanceCounter();
136 void setOutputFile(std::string);
139 std::string getOutputFileName();
140 void removeOutputFile();
141 std::string _outputFileName;
142 // This will change current directory when the class is instanciated and switch
148 std::streambuf* _coutBuffer; // to re-/store cout.rdbuf()
151 //=============================================================================
153 * \brief This class calls the NETGEN mesher of OCC geometry
155 //=============================================================================
157 class NETGENPLUGIN_EXPORT NETGENPlugin_Mesher
160 // ---------- PUBLIC METHODS ----------
162 NETGENPlugin_Mesher (SMESH_Mesh* mesh, const TopoDS_Shape& aShape,
163 const bool isVolume);
164 ~NETGENPlugin_Mesher();
165 void SetSelfPointer( NETGENPlugin_Mesher ** ptr );
167 void SetParameters(const NETGENPlugin_Hypothesis* hyp);
168 void SetParameters(const NETGENPlugin_SimpleHypothesis_2D* hyp);
169 void SetParameters(const StdMeshers_ViscousLayers* hyp );
170 void SetViscousLayers2DAssigned(bool isAssigned) { _isViscousLayers2D = isAssigned; }
172 void SetLocalSizeForChordalError( netgen::OCCGeometry& occgeo, netgen::Mesh& ngMesh );
173 static void SetLocalSize( netgen::OCCGeometry& occgeo, netgen::Mesh& ngMesh );
177 bool Evaluate(MapShapeNbElems& aResMap);
179 double GetProgress(const SMESH_Algo* holder,
180 const int * algoProgressTic,
181 const double * algoProgress) const;
183 static void PrepareOCCgeometry(netgen::OCCGeometry& occgeom,
184 const TopoDS_Shape& shape,
186 std::list< SMESH_subMesh* > * meshedSM=0,
187 NETGENPlugin_Internals* internalShapes=0);
189 static double GetDefaultMinSize(const TopoDS_Shape& shape,
190 const double maxSize);
192 static void RestrictLocalSize(netgen::Mesh& ngMesh,
195 const bool overrideMinH=true);
197 static int FillSMesh(const netgen::OCCGeometry& occgeom,
198 netgen::Mesh& ngMesh,
199 const NETGENPlugin_ngMeshInfo& initState,
201 std::vector<const SMDS_MeshNode*>& nodeVec,
202 SMESH_Comment& comment,
203 SMESH_MesherHelper* quadHelper=0);
205 bool FillNgMesh(netgen::OCCGeometry& occgeom,
206 netgen::Mesh& ngMesh,
207 std::vector<const SMDS_MeshNode*>& nodeVec,
208 const std::list< SMESH_subMesh* > & meshedSM,
209 SMESH_MesherHelper* quadHelper=0,
210 SMESH_ProxyMesh::Ptr proxyMesh=SMESH_ProxyMesh::Ptr());
212 static void FixIntFaces(const netgen::OCCGeometry& occgeom,
213 netgen::Mesh& ngMesh,
214 NETGENPlugin_Internals& internalShapes);
216 static bool FixFaceMesh(const netgen::OCCGeometry& occgeom,
217 netgen::Mesh& ngMesh,
220 static void AddIntVerticesInFaces(const netgen::OCCGeometry& occgeom,
221 netgen::Mesh& ngMesh,
222 std::vector<const SMDS_MeshNode*>& nodeVec,
223 NETGENPlugin_Internals& internalShapes);
225 static void AddIntVerticesInSolids(const netgen::OCCGeometry& occgeom,
226 netgen::Mesh& ngMesh,
227 std::vector<const SMDS_MeshNode*>& nodeVec,
228 NETGENPlugin_Internals& internalShapes);
230 static SMESH_ComputeErrorPtr
231 AddSegmentsToMesh(netgen::Mesh& ngMesh,
232 netgen::OCCGeometry& geom,
233 const TSideVector& wires,
234 SMESH_MesherHelper& helper,
235 std::vector< const SMDS_MeshNode* > & nodeVec,
236 const bool overrideMinH=true);
238 void SetDefaultParameters();
240 static SMESH_ComputeErrorPtr ReadErrors(const std::vector< const SMDS_MeshNode* >& nodeVec);
243 static void toPython( const netgen::Mesh* ngMesh ); // debug
248 const TopoDS_Shape& _shape;
252 bool _isViscousLayers2D;
253 double _chordalError;
254 netgen::Mesh* _ngMesh;
255 netgen::OCCGeometry* _occgeom;
258 volatile int _progressTic;
259 volatile double _ticTime; // normalized [0,1] compute time per a SMESH_Algo::_progressTic
260 volatile double _totalTime;
262 const NETGENPlugin_SimpleHypothesis_2D * _simpleHyp;
263 const StdMeshers_ViscousLayers* _viscousLayersHyp;
265 // a pointer to NETGENPlugin_Mesher* field of the holder, that will be
266 // nullified at destruction of this
267 NETGENPlugin_Mesher ** _ptrToMe;
270 //=============================================================================
272 * \brief Container of info needed to solve problems with internal shapes.
274 * Issue 0020676. It is made up as a class to be ready to extract from NETGEN
275 * and put in SMESH as soon as the same solution is needed somewhere else.
276 * The approach is to precompute internal edges in 2D and internal faces in 3D
277 * and put their mesh correctly (twice) into netgen mesh.
278 * In 2D, this class finds internal edges in faces and their vertices.
279 * In 3D, it additionally finds internal faces, their edges shared with other faces,
280 * and their vertices shared by several internal edges. Nodes built on the found
281 * shapes and mesh faces built on the found internal faces are to be doubled in
282 * netgen mesh to emulate a "crack"
284 * For internal faces a more simple solution is found, which is just to duplicate
285 * mesh faces on internal geom faces without modeling a "real crack". For this
286 * reason findBorderElements() is no more used anywhere.
288 //=============================================================================
290 class NETGENPLUGIN_EXPORT NETGENPlugin_Internals
295 std::map<int,int> _e2face;//!<edges and their vertices in faces where they are TopAbs_INTERNAL
296 std::map<int,std::list<int> > _f2v;//!<faces with internal vertices
298 std::set<int> _intShapes;
299 std::set<int> _borderFaces; //!< non-internal faces sharing the internal edge
300 std::map<int,std::list<int> > _s2v;//!<solids with internal vertices
303 NETGENPlugin_Internals( SMESH_Mesh& mesh, const TopoDS_Shape& shape, bool is3D );
305 SMESH_Mesh& getMesh() const;
307 bool isShapeToPrecompute(const TopoDS_Shape& s);
311 bool hasInternalEdges() const { return !_e2face.empty(); }
312 bool isInternalEdge( int id ) const { return _e2face.count( id ); }
313 const std::map<int,int>& getEdgesAndVerticesWithFaces() const { return _e2face; }
314 void getInternalEdges( TopTools_IndexedMapOfShape& fmap,
315 TopTools_IndexedMapOfShape& emap,
316 TopTools_IndexedMapOfShape& vmap,
317 std::list< SMESH_subMesh* > smToPrecompute[]);
319 bool hasInternalVertexInFace() const { return !_f2v.empty(); }
320 const std::map<int,std::list<int> >& getFacesWithVertices() const { return _f2v; }
324 bool hasInternalFaces() const { return !_intShapes.empty(); }
325 bool isInternalShape( int id ) const { return _intShapes.count( id ); }
326 void findBorderElements( std::set< const SMDS_MeshElement*, TIDCompare > & borderElems );
327 bool isBorderFace( int faceID ) const { return _borderFaces.count( faceID ); }
328 void getInternalFaces( TopTools_IndexedMapOfShape& fmap,
329 TopTools_IndexedMapOfShape& emap,
330 std::list< SMESH_subMesh* >& facesSM,
331 std::list< SMESH_subMesh* >& boundarySM);
333 bool hasInternalVertexInSolid() const { return !_s2v.empty(); }
334 bool hasInternalVertexInSolid(int soID ) const { return _s2v.count(soID); }
335 const std::map<int,std::list<int> >& getSolidsWithVertices() const { return _s2v; }