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 //=============================================================================
24 // File : NETGENPlugin_NETGEN_3D_SA.cxx
25 // Created : lundi 19 Septembre 2022
26 // Author : Yoann AUDOUIN (CEA)
28 //=============================================================================
31 #include "NETGENPlugin_NETGEN_3D_SA.hxx"
33 #include "NETGENPlugin_DriverParam.hxx"
34 #include "NETGENPlugin_Hypothesis.hxx"
35 #include "StdMeshers_MaxElementVolume.hxx"
37 #include <SMESH_Gen.hxx>
38 #include <SMESH_Mesh.hxx>
39 #include <SMESH_MesherHelper.hxx>
40 #include <SMESH_DriverShape.hxx>
41 #include <SMESH_DriverMesh.hxx>
42 #include <SMESHDS_Mesh.hxx>
45 #include <boost/filesystem.hpp>
46 namespace fs = boost::filesystem;
55 #include <occgeom.hpp>
58 #include <ngexception.hpp>
61 #include <core/exception.hpp>
69 NETGENPLUGIN_DLL_HEADER
70 extern MeshingParameters mparam;
72 NETGENPLUGIN_DLL_HEADER
73 extern volatile multithreadt multithread;
75 using namespace nglib;
77 //=============================================================================
81 //=============================================================================
83 NETGENPlugin_NETGEN_3D_SA::NETGENPlugin_NETGEN_3D_SA()
84 : NETGENPlugin_NETGEN_3D(0, new SMESH_Gen())
86 _name = "NETGEN_3D_SA";
89 //=============================================================================
93 //=============================================================================
95 NETGENPlugin_NETGEN_3D_SA::~NETGENPlugin_NETGEN_3D_SA()
102 * @brief fill plugin hypothesis from the netgen_params structure
104 * @param aParams the structure
105 * @param gen SMESH_Gen associate with the SA
107 void NETGENPlugin_NETGEN_3D_SA::fillHyp(netgen_params aParams)
110 std::cout << "_gen is set" << std::endl;
111 if(aParams.has_netgen_param){
112 NETGENPlugin_Hypothesis * hypParameters = new NETGENPlugin_Hypothesis(0, GetGen());
114 hypParameters->SetMaxSize(aParams.maxh);
115 hypParameters->SetMinSize(aParams.minh);
116 hypParameters->SetNbSegPerEdge(aParams.segmentsperedge);
117 hypParameters->SetGrowthRate(aParams.grading);
118 hypParameters->SetNbSegPerRadius(aParams.curvaturesafety);
119 hypParameters->SetSecondOrder(aParams.secondorder);
120 hypParameters->SetQuadAllowed(aParams.quad);
121 hypParameters->SetOptimize(aParams.optimize);
122 hypParameters->SetFineness((NETGENPlugin_Hypothesis::Fineness)aParams.fineness);
123 hypParameters->SetSurfaceCurvature(aParams.uselocalh);
124 hypParameters->SetFuseEdges(aParams.merge_solids);
125 hypParameters->SetChordalErrorEnabled(aParams.chordalError);
126 if(aParams.optimize){
127 hypParameters->SetNbSurfOptSteps(aParams.optsteps2d);
128 hypParameters->SetNbVolOptSteps(aParams.optsteps3d);
130 hypParameters->SetElemSizeWeight(aParams.elsizeweight);
131 hypParameters->SetWorstElemMeasure(aParams.opterrpow);
132 hypParameters->SetUseDelauney(aParams.delaunay);
133 hypParameters->SetCheckOverlapping(aParams.checkoverlap);
134 hypParameters->SetCheckChartBoundary(aParams.checkchartboundary);
135 hypParameters->SetMeshSizeFile(aParams.meshsizefilename);
137 _hypParameters = dynamic_cast< const NETGENPlugin_Hypothesis *> (hypParameters);
139 if(aParams.has_maxelementvolume_hyp){
140 _hypMaxElementVolume = new StdMeshers_MaxElementVolume(1, GetGen());
141 _maxElementVolume = aParams.maxElementVolume;
143 // TODO: Handle viscous layer
147 * @brief Write a binary file containing information on the elements/nodes
148 * created by the mesher
150 * @param nodeVec mapping between the mesh id and the netgen structure id
151 * @param ngLib Wrapper on netgen library
152 * @param new_element_file Name of the output file
153 * @param Netgen_NbOfNodes Number of nodes in the netgen structure
154 * @return true if there are some error
156 bool NETGENPlugin_NETGEN_3D_SA::computeFillNewElementFile(
157 std::vector< const SMDS_MeshNode* > &nodeVec,
158 NETGENPlugin_NetgenLibWrapper &ngLib,
159 std::string new_element_file,
160 int &Netgen_NbOfNodes
163 Ng_Mesh* Netgen_mesh = ngLib.ngMesh();
165 int Netgen_NbOfNodesNew = Ng_GetNP(Netgen_mesh);
166 int Netgen_NbOfTetra = Ng_GetNE(Netgen_mesh);
168 bool isOK = ( Netgen_NbOfTetra > 0 );
169 if ( isOK && !new_element_file.empty() )
171 std::ofstream df(new_element_file, ios::out|ios::binary);
173 double Netgen_point[3];
174 int Netgen_tetrahedron[4];
176 // Writing nodevec (correspondence netgen numbering mesh numbering)
178 df.write((char*) &Netgen_NbOfNodes, sizeof(int));
179 df.write((char*) &Netgen_NbOfNodesNew, sizeof(int));
180 for (int nodeIndex = 1 ; nodeIndex <= Netgen_NbOfNodes; ++nodeIndex )
183 int id = nodeVec.at(nodeIndex)->GetID();
184 df.write((char*) &id, sizeof(int));
187 // Writing info on new points
188 for (int nodeIndex = Netgen_NbOfNodes +1 ; nodeIndex <= Netgen_NbOfNodesNew; ++nodeIndex )
190 Ng_GetPoint(Netgen_mesh, nodeIndex, Netgen_point );
191 // Coordinates of the point
192 df.write((char *) &Netgen_point, sizeof(double)*3);
195 // create tetrahedrons
196 df.write((char*) &Netgen_NbOfTetra, sizeof(int));
197 for ( int elemIndex = 1; elemIndex <= Netgen_NbOfTetra; ++elemIndex )
199 Ng_GetVolumeElement(Netgen_mesh, elemIndex, Netgen_tetrahedron);
200 df.write((char*) &Netgen_tetrahedron, sizeof(int)*4);
207 * @brief Compute mesh associated to shape
209 * @param aShape the shape
210 * @param aMesh the mesh
211 * @param aParams netgen_params structure
212 * @param new_element_file Name of the file containing new element
213 * @param output_mesh Name of the output mesh (if empty it will not be written)
214 * @return true if there are some error
216 bool NETGENPlugin_NETGEN_3D_SA::Compute(
217 TopoDS_Shape &aShape,
219 netgen_params& aParams,
220 std::string new_element_file,
223 // vector of nodes in which node index == netgen ID
224 vector< const SMDS_MeshNode* > nodeVec;
225 NETGENPlugin_NetgenLibWrapper ngLib;
226 SMESH_MesherHelper helper(aMesh);
227 int startWith = netgen::MESHCONST_MESHVOLUME;
228 int endWith = netgen::MESHCONST_OPTVOLUME;
229 int Netgen_NbOfNodes=0;
231 // Changing netgen log_file putting it next to new_element_file
232 fs::path netgen_log_file = fs::path(new_element_file).remove_filename() / fs::path("NETGEN.out");
234 ngLib.setOutputFile(netgen_log_file.string());
236 NETGENPlugin_NETGEN_3D::computeFillNgMesh(aMesh, aShape, nodeVec, ngLib, helper, Netgen_NbOfNodes);
238 netgen::OCCGeometry occgeo;
239 NETGENPlugin_NETGEN_3D::computePrepareParam(aMesh, ngLib, occgeo, helper, endWith);
241 NETGENPlugin_NETGEN_3D::computeRunMesher(occgeo, nodeVec, ngLib._ngMesh, ngLib, startWith, endWith);
243 computeFillNewElementFile(nodeVec, ngLib, new_element_file, Netgen_NbOfNodes);
246 NETGENPlugin_NETGEN_3D::computeFillMesh(nodeVec, ngLib, helper, Netgen_NbOfNodes);
253 * @brief Running the mesher on the given files
255 * @param input_mesh_file Mesh file (containing 2D elements)
256 * @param shape_file Shape file (BREP or STEP format)
257 * @param hypo_file Ascii file containing the netgen parameters
258 * @param element_orientation_file Binary file containing the orientation of surface elemnts
259 * @param new_element_file output file containing info the elements created by the mesher
260 * @param output_mesh_file output mesh file (if empty it will not be created)
263 int NETGENPlugin_NETGEN_3D_SA::run(const std::string input_mesh_file,
264 const std::string shape_file,
265 const std::string hypo_file,
266 const std::string element_orientation_file,
267 const std::string new_element_file,
268 const std::string output_mesh_file)
271 _element_orientation_file = element_orientation_file;
273 std::unique_ptr<SMESH_Mesh> myMesh(_gen->CreateMesh(false));
275 importMesh(input_mesh_file, *myMesh);
278 TopoDS_Shape myShape;
279 importShape(shape_file, myShape);
281 // Importing hypothesis
282 netgen_params myParams;
284 importNetgenParams(hypo_file, myParams);
287 MESSAGE("Meshing with netgen3d");
288 int ret = Compute(myShape, *myMesh, myParams,
290 !output_mesh_file.empty());
294 std::cerr << "Meshing failed" << std::endl;
298 if(!output_mesh_file.empty()){
299 std::string meshName = "MESH";
300 exportMesh(output_mesh_file, *myMesh, meshName);
307 * @brief Compute the list of already meshed Surface elements and info
308 * on their orientation and if they are internal
310 * @param aMesh Global Mesh
311 * @param aShape Shape associated to the mesh
312 * @param proxyMesh pointer to mesh used fo find the elements
313 * @param internals information on internal sub shapes
314 * @param helper helper associated to the mesh
315 * @param listElements map of surface element associated with
316 * their orientation and internal status
317 * @return true if their was some error
319 bool NETGENPlugin_NETGEN_3D_SA::getSurfaceElements(
321 const TopoDS_Shape& aShape,
322 SMESH_ProxyMesh::Ptr proxyMesh,
323 NETGENPlugin_Internals &internals,
324 SMESH_MesherHelper &helper,
325 std::map<const SMDS_MeshElement*, tuple<bool, bool>, TIDCompare>& listElements
328 // To remove compilation warnings
333 SMESHDS_Mesh* meshDS = aMesh.GetMeshDS();
335 // Get list of elements + their orientation from element_orientation file
336 std::map<vtkIdType, bool> elemOrientation;
338 // Setting all element orientation to false if there no element orientation file
339 if(_element_orientation_file.empty()){
340 MESSAGE("No element orientation file");
342 SMDS_ElemIteratorPtr iteratorElem = meshDS->elementsIterator(SMDSAbs_Face);
343 while ( iteratorElem->more() ) // loop on elements on a geom face
346 const SMDS_MeshElement* elem = iteratorElem->next();
347 elemOrientation[elem->GetID()] = false;
350 MESSAGE("Reading from elements from file: " << _element_orientation_file);
351 std::ifstream df(_element_orientation_file, ios::binary|ios::in);
355 // Warning of the use of vtkIdType (I had issue when run_mesher was compiled with internal vtk) and salome not
356 // Sizeof was the same but how he othered the type was different
357 // Maybe using another type (uint64_t) instead would be better
359 df.read((char*)&nbElement, sizeof(int));
361 for(int ielem=0;ielem<nbElement;++ielem){
362 df.read((char*) &id, sizeof(vtkIdType));
363 df.read((char*) &orient, sizeof(bool));
364 elemOrientation[id] = orient;
369 // Adding elements from Mesh
370 SMDS_ElemIteratorPtr iteratorElem = meshDS->elementsIterator(SMDSAbs_Face);
375 while ( iteratorElem->more() ) // loop on elements on a geom face
378 const SMDS_MeshElement* elem = iteratorElem->next();
380 return error( COMPERR_BAD_INPUT_MESH, "Null element encounters");
382 if ( elem->NbCornerNodes() != 3 ){
383 return error( COMPERR_BAD_INPUT_MESH, "Not triangle element encounters");
385 // Keeping only element that are in the element orientation file
386 isIn = elemOrientation.count(elem->GetID())==1;
390 // Netgen requires that all the triangle point outside
391 isRev = elemOrientation[elem->GetID()];
392 listElements[elem] = tuple(isRev, false);