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.cxx
25 // Moved here from SMESH_NETGEN_3D.cxx
26 // Created : lundi 27 Janvier 2003
27 // Author : Nadir BOUHAMOU (CEA)
29 //=============================================================================
31 #include "NETGENPlugin_NETGEN_3D.hxx"
33 #include "NETGENPlugin_Hypothesis.hxx"
35 #include "DriverStep.hxx"
36 #include "DriverMesh.hxx"
37 #include "netgen_param.hxx"
39 #include <SMDS_MeshElement.hxx>
40 #include <SMDS_MeshNode.hxx>
41 #include <SMESHDS_Mesh.hxx>
42 #include <SMESH_Comment.hxx>
43 #include <SMESH_ControlsDef.hxx>
44 #include <SMESH_Gen.hxx>
45 #include <SMESH_Mesh.hxx>
46 #include <SMESH_MeshEditor.hxx>
47 #include <SMESH_MesherHelper.hxx>
48 #include <SMESH_subMesh.hxx>
49 #include <StdMeshers_MaxElementVolume.hxx>
50 #include <StdMeshers_QuadToTriaAdaptor.hxx>
51 #include <StdMeshers_ViscousLayers.hxx>
52 #include <SMESH_subMesh.hxx>
54 #include <BRepGProp.hxx>
55 #include <BRep_Tool.hxx>
56 #include <GProp_GProps.hxx>
58 #include <TopExp_Explorer.hxx>
59 #include <TopTools_ListIteratorOfListOfShape.hxx>
62 #include <Standard_Failure.hxx>
63 #include <Standard_ErrorHandler.hxx>
65 #include <utilities.h>
72 #include <boost/filesystem.hpp>
73 namespace fs = boost::filesystem;
82 #include <occgeom.hpp>
85 #include <ngexception.hpp>
88 #include <core/exception.hpp>
96 NETGENPLUGIN_DLL_HEADER
97 extern MeshingParameters mparam;
99 NETGENPLUGIN_DLL_HEADER
100 extern volatile multithreadt multithread;
102 using namespace nglib;
105 //=============================================================================
109 //=============================================================================
111 NETGENPlugin_NETGEN_3D::NETGENPlugin_NETGEN_3D(int hypId, SMESH_Gen* gen)
112 : SMESH_3D_Algo(hypId, gen)
115 _shapeType = (1 << TopAbs_SHELL) | (1 << TopAbs_SOLID);// 1 bit /shape type
116 _compatibleHypothesis.push_back("MaxElementVolume");
117 _compatibleHypothesis.push_back("NETGEN_Parameters");
118 _compatibleHypothesis.push_back("ViscousLayers");
120 _maxElementVolume = 0.;
122 _hypMaxElementVolume = NULL;
123 _hypParameters = NULL;
124 _viscousLayersHyp = NULL;
126 _requireShape = false; // can work without shape
129 //=============================================================================
133 //=============================================================================
135 NETGENPlugin_NETGEN_3D::~NETGENPlugin_NETGEN_3D()
139 //=============================================================================
143 //=============================================================================
145 bool NETGENPlugin_NETGEN_3D::CheckHypothesis (SMESH_Mesh& aMesh,
146 const TopoDS_Shape& aShape,
147 Hypothesis_Status& aStatus)
149 _hypMaxElementVolume = NULL;
150 _hypParameters = NULL;
151 _viscousLayersHyp = NULL;
152 _maxElementVolume = DBL_MAX;
154 // for correct work of GetProgress():
155 //netgen::multithread.percent = 0.;
156 //netgen::multithread.task = "Volume meshing";
157 _progressByTic = -1.;
159 list<const SMESHDS_Hypothesis*>::const_iterator itl;
160 //const SMESHDS_Hypothesis* theHyp;
162 const list<const SMESHDS_Hypothesis*>& hyps =
163 GetUsedHypothesis(aMesh, aShape, /*ignoreAuxiliary=*/false);
164 list <const SMESHDS_Hypothesis* >::const_iterator h = hyps.begin();
165 if ( h == hyps.end())
167 aStatus = SMESH_Hypothesis::HYP_OK;
168 return true; // can work with no hypothesis
172 for ( ; h != hyps.end(); ++h )
174 if ( !_hypMaxElementVolume )
175 _hypMaxElementVolume = dynamic_cast< const StdMeshers_MaxElementVolume*> ( *h );
176 if ( !_viscousLayersHyp ) // several _viscousLayersHyp's allowed
177 _viscousLayersHyp = dynamic_cast< const StdMeshers_ViscousLayers*> ( *h );
178 if ( ! _hypParameters )
179 _hypParameters = dynamic_cast< const NETGENPlugin_Hypothesis*> ( *h );
181 if ( *h != _hypMaxElementVolume &&
182 *h != _viscousLayersHyp &&
183 *h != _hypParameters &&
184 !dynamic_cast< const StdMeshers_ViscousLayers*>(*h)) // several VL hyps allowed
185 aStatus = HYP_INCOMPATIBLE;
187 if ( _hypMaxElementVolume && _hypParameters )
188 aStatus = HYP_INCOMPATIBLE;
189 else if ( aStatus == HYP_OK && _viscousLayersHyp )
190 error( _viscousLayersHyp->CheckHypothesis( aMesh, aShape, aStatus ));
192 if ( _hypMaxElementVolume )
193 _maxElementVolume = _hypMaxElementVolume->GetMaxVolume();
195 return aStatus == HYP_OK;
199 void NETGENPlugin_NETGEN_3D::FillParameters(const NETGENPlugin_Hypothesis* hyp, netgen_params &aParams)
201 aParams.maxh = hyp->GetMaxSize();
202 aParams.minh = hyp->GetMinSize();
203 aParams.segmentsperedge = hyp->GetNbSegPerEdge();
204 aParams.grading = hyp->GetGrowthRate();
205 aParams.curvaturesafety = hyp->GetNbSegPerRadius();
206 aParams.secondorder = hyp->GetSecondOrder() ? 1 : 0;
207 aParams.quad = hyp->GetQuadAllowed() ? 1 : 0;
208 aParams.optimize = hyp->GetOptimize();
209 aParams.fineness = hyp->GetFineness();
210 aParams.uselocalh = hyp->GetSurfaceCurvature();
211 aParams.merge_solids = hyp->GetFuseEdges();
212 aParams.chordalError = hyp->GetChordalErrorEnabled() ? hyp->GetChordalError() : -1.;
213 aParams.optsteps2d = aParams.optimize ? hyp->GetNbSurfOptSteps() : 0;
214 aParams.optsteps3d = aParams.optimize ? hyp->GetNbVolOptSteps() : 0;
215 aParams.elsizeweight = hyp->GetElemSizeWeight();
216 aParams.opterrpow = hyp->GetWorstElemMeasure();
217 aParams.delaunay = hyp->GetUseDelauney();
218 aParams.checkoverlap = hyp->GetCheckOverlapping();
219 aParams.checkchartboundary = hyp->GetCheckChartBoundary();
222 aParams.meshsizefilename = hyp->GetMeshSizeFile();
225 aParams.meshsizefilename = hyp->GetMeshSizeFile();
228 aParams.closeedgefac = 2;
230 aParams.closeedgefac = 0;
234 // write in a binary file the orientation for each 2D element of the mesh
235 void NETGENPlugin_NETGEN_3D::exportElementOrientation(SMESH_Mesh& aMesh,
236 const TopoDS_Shape& aShape,
237 netgen_params& aParams,
238 const std::string output_file)
240 SMESH_MesherHelper helper(aMesh);
241 NETGENPlugin_Internals internals( aMesh, aShape, /*is3D=*/true );
242 SMESH_ProxyMesh::Ptr proxyMesh( new SMESH_ProxyMesh( aMesh ));
243 std::map<vtkIdType, bool> elemOrientation;
245 for ( TopExp_Explorer exFa( aShape, TopAbs_FACE ); exFa.More(); exFa.Next())
247 const TopoDS_Shape& aShapeFace = exFa.Current();
248 int faceID = aMesh.GetMeshDS()->ShapeToIndex( aShapeFace );
249 bool isInternalFace = internals.isInternalShape( faceID );
251 if ( !isInternalFace &&
252 helper.NbAncestors(aShapeFace, aMesh, aShape.ShapeType()) > 1 )
253 // IsReversedSubMesh() can work wrong on strongly curved faces,
254 // so we use it as less as possible
255 isRev = helper.IsReversedSubMesh( TopoDS::Face( aShapeFace ));
257 const SMESHDS_SubMesh * aSubMeshDSFace = proxyMesh->GetSubMesh( aShapeFace );
258 if ( !aSubMeshDSFace ) continue;
260 SMDS_ElemIteratorPtr iteratorElem = aSubMeshDSFace->GetElements();
261 if ( aParams._quadraticMesh &&
262 dynamic_cast< const SMESH_ProxyMesh::SubMesh*>( aSubMeshDSFace ))
264 // add medium nodes of proxy triangles to helper (#16843)
265 while ( iteratorElem->more() )
266 helper.AddTLinks( static_cast< const SMDS_MeshFace* >( iteratorElem->next() ));
268 iteratorElem = aSubMeshDSFace->GetElements();
270 while ( iteratorElem->more() ) // loop on elements on a geom face
273 const SMDS_MeshElement* elem = iteratorElem->next();
275 error( COMPERR_BAD_INPUT_MESH, "Null element encounters");
276 if ( elem->NbCornerNodes() != 3 )
277 error( COMPERR_BAD_INPUT_MESH, "Not triangle element encounters");
278 elemOrientation[elem->GetID()] = isRev;
279 } // loop on elements on a face
280 } // loop on faces of a SOLID or SHELL
282 std::ofstream df(output_file, ios::out|ios::binary);
283 int size=elemOrientation.size();
285 df.write((char*)&size, sizeof(int));
286 for(auto const& [id, orient]:elemOrientation){
287 df.write((char*)&id, sizeof(vtkIdType));
288 df.write((char*)&orient, sizeof(bool));
293 int NETGENPlugin_NETGEN_3D::RemoteCompute(SMESH_Mesh& aMesh,
294 const TopoDS_Shape& aShape)
297 auto time0 = std::chrono::high_resolution_clock::now();
298 SMESH_Hypothesis::Hypothesis_Status hypStatus;
299 CheckHypothesis(aMesh, aShape, hypStatus);
300 auto time1 = std::chrono::high_resolution_clock::now();
301 auto elapsed = std::chrono::duration_cast<std::chrono::nanoseconds>(time1-time0);
302 std::cout << "Time for check_hypo: " << elapsed.count() * 1e-9 << std::endl;
305 // Temporary folder for run
306 fs::path tmp_folder = aMesh.tmp_folder / fs::unique_path(fs::path("Volume-%%%%-%%%%"));
307 fs::create_directories(tmp_folder);
308 // Using MESH2D generated after all triangles where created.
309 fs::path mesh_file=aMesh.tmp_folder / fs::path("Mesh2D.med");
310 fs::path element_orientation_file=tmp_folder / fs::path("element_orientation.dat");
311 fs::path new_element_file=tmp_folder / fs::path("new_elements.dat");
312 fs::path tmp_mesh_file=tmp_folder / fs::path("tmp_mesh.med");
313 // TODO: Remove that file we do not use it
314 fs::path output_mesh_file=tmp_folder / fs::path("output_mesh.med");
315 fs::path shape_file=tmp_folder / fs::path("shape.step");
316 fs::path param_file=tmp_folder / fs::path("netgen3d_param.txt");
317 fs::path log_file=tmp_folder / fs::path("run_mesher.log");
318 //TODO: Handle variable mesh_name
319 std::string mesh_name = "Maillage_1";
322 export_shape(shape_file.string(), aShape);
323 auto time2 = std::chrono::high_resolution_clock::now();
324 elapsed = std::chrono::duration_cast<std::chrono::nanoseconds>(time2-time1);
325 std::cout << "Time for export_shape: " << elapsed.count() * 1e-9 << std::endl;
328 netgen_params aParams;
329 FillParameters(_hypParameters, aParams);
331 export_netgen_params(param_file.string(), aParams);
332 auto time3 = std::chrono::high_resolution_clock::now();
333 elapsed = std::chrono::duration_cast<std::chrono::nanoseconds>(time3-time2);
334 std::cout << "Time for fill+export param: " << elapsed.count() * 1e-9 << std::endl;
336 // Exporting element orientation
337 exportElementOrientation(aMesh, aShape, aParams, element_orientation_file.string());
338 auto time4 = std::chrono::high_resolution_clock::now();
339 elapsed = std::chrono::duration_cast<std::chrono::nanoseconds>(time4-time3);
340 std::cout << "Time for exportElemnOrient: " << elapsed.count() * 1e-9 << std::endl;
343 // Calling run_mesher
344 // TODO: check if we need to handle the .exe for windows
346 fs::path run_mesher_exe =
347 fs::path(std::getenv("NETGENPLUGIN_ROOT_DIR"))/
350 fs::path("run_mesher");
351 cmd = run_mesher_exe.string() +
352 " NETGEN3D " + mesh_file.string() + " "
353 + shape_file.string() + " "
354 + param_file.string() + " "
355 + element_orientation_file.string() + " "
356 + std::to_string(aMesh.GetMesherNbThreads()) + " "
357 + new_element_file.string() + " "
358 + std::to_string(0) + " "
359 + output_mesh_file.string() +
360 " >> " + log_file.string();
362 //std::cout << "Running command: " << std::endl;
363 //std::cout << cmd << std::endl;
365 // Writing command in log
366 std::ofstream flog(log_file.string());
370 // TODO: Replace system by something else to handle redirection for windows
371 int ret = system(cmd.c_str());
372 auto time5 = std::chrono::high_resolution_clock::now();
373 elapsed = std::chrono::duration_cast<std::chrono::nanoseconds>(time5-time4);
374 std::cout << "Time for exec of run_mesher: " << elapsed.count() * 1e-9 << std::endl;
376 // TODO: better error handling (display log ?)
379 std::cerr << "Issue with command: " << std::endl;
380 std::cerr << cmd << std::endl;
385 std::ifstream df(new_element_file.string(), ios::binary);
387 int Netgen_NbOfNodes;
388 int Netgen_NbOfNodesNew;
389 int Netgen_NbOfTetra;
390 double Netgen_point[3];
391 int Netgen_tetrahedron[4];
394 SMESH_MesherHelper helper(aMesh);
396 int _quadraticMesh = helper.IsQuadraticSubMesh(aShape);
397 helper.SetElementsOnShape( true );
399 // Number of nodes in intial mesh
400 df.read((char*) &Netgen_NbOfNodes, sizeof(int));
401 // Number of nodes added by netgen
402 df.read((char*) &Netgen_NbOfNodesNew, sizeof(int));
404 // Filling nodevec (correspondence netgen numbering mesh numbering)
405 vector< const SMDS_MeshNode* > nodeVec ( Netgen_NbOfNodesNew + 1 );
406 //vector<int> nodeTmpVec ( Netgen_NbOfNodesNew + 1 );
407 SMESHDS_Mesh * meshDS = helper.GetMeshDS();
408 for (int nodeIndex = 1 ; nodeIndex <= Netgen_NbOfNodes; ++nodeIndex )
411 df.read((char*) &nodeID, sizeof(int));
412 nodeVec.at(nodeIndex) = meshDS->FindNode(nodeID);
415 auto time6 = std::chrono::high_resolution_clock::now();
416 elapsed = std::chrono::duration_cast<std::chrono::nanoseconds>(time6-time5);
417 std::cout << "Time for exec of nodeVec: " << elapsed.count() * 1e-9 << std::endl;
420 // Add new points and update nodeVec
421 for (int nodeIndex = Netgen_NbOfNodes +1 ; nodeIndex <= Netgen_NbOfNodesNew; ++nodeIndex )
423 df.read((char *) &Netgen_point, sizeof(double)*3);
425 nodeVec.at(nodeIndex) = helper.AddNode(Netgen_point[0],
431 df.read((char*) &Netgen_NbOfTetra, sizeof(int));
433 for ( int elemIndex = 1; elemIndex <= Netgen_NbOfTetra; ++elemIndex )
435 df.read((char*) &Netgen_tetrahedron, sizeof(int)*4);
437 nodeVec.at( Netgen_tetrahedron[0] ),
438 nodeVec.at( Netgen_tetrahedron[1] ),
439 nodeVec.at( Netgen_tetrahedron[2] ),
440 nodeVec.at( Netgen_tetrahedron[3] ));
443 auto time7 = std::chrono::high_resolution_clock::now();
444 elapsed = std::chrono::duration_cast<std::chrono::nanoseconds>(time7-time6);
445 std::cout << "Time for exec of add_in_mesh: " << elapsed.count() * 1e-9 << std::endl;
447 fs::remove_all(tmp_folder);
453 //=============================================================================
455 *Here we are going to use the NETGEN mesher
457 //=============================================================================
459 bool NETGENPlugin_NETGEN_3D::Compute(SMESH_Mesh& aMesh,
460 const TopoDS_Shape& aShape)
462 if(aMesh.IsParallel())
463 return RemoteCompute(aMesh, aShape);
464 auto time0 = std::chrono::high_resolution_clock::now();
466 netgen::multithread.terminate = 0;
467 netgen::multithread.task = "Volume meshing";
468 _progressByTic = -1.;
470 SMESHDS_Mesh* meshDS = aMesh.GetMeshDS();
472 SMESH_MesherHelper helper(aMesh);
473 _quadraticMesh = helper.IsQuadraticSubMesh(aShape);
474 helper.SetElementsOnShape( true );
476 int Netgen_NbOfNodes = 0;
477 double Netgen_point[3];
478 int Netgen_triangle[3];
480 NETGENPlugin_NetgenLibWrapper ngLib;
481 Ng_Mesh * Netgen_mesh = (Ng_Mesh*)ngLib._ngMesh;
483 // vector of nodes in which node index == netgen ID
484 vector< const SMDS_MeshNode* > nodeVec;
486 const int invalid_ID = -1;
488 SMESH::Controls::Area areaControl;
489 SMESH::Controls::TSequenceOfXYZ nodesCoords;
491 // maps nodes to ng ID
492 typedef map< const SMDS_MeshNode*, int, TIDCompare > TNodeToIDMap;
493 typedef TNodeToIDMap::value_type TN2ID;
494 TNodeToIDMap nodeToNetgenID;
496 // find internal shapes
497 NETGENPlugin_Internals internals( aMesh, aShape, /*is3D=*/true );
499 // ---------------------------------
500 // Feed the Netgen with surface mesh
501 // ---------------------------------
503 TopAbs_ShapeEnum mainType = aMesh.GetShapeToMesh().ShapeType();
504 bool checkReverse = ( mainType == TopAbs_COMPOUND || mainType == TopAbs_COMPSOLID );
506 SMESH_ProxyMesh::Ptr proxyMesh( new SMESH_ProxyMesh( aMesh ));
507 if ( _viscousLayersHyp )
509 netgen::multithread.percent = 3;
510 proxyMesh = _viscousLayersHyp->Compute( aMesh, aShape );
514 if ( aMesh.NbQuadrangles() > 0 )
516 netgen::multithread.percent = 6;
517 StdMeshers_QuadToTriaAdaptor* Adaptor = new StdMeshers_QuadToTriaAdaptor;
518 Adaptor->Compute(aMesh,aShape,proxyMesh.get());
519 proxyMesh.reset( Adaptor );
522 for ( TopExp_Explorer exFa( aShape, TopAbs_FACE ); exFa.More(); exFa.Next())
524 const TopoDS_Shape& aShapeFace = exFa.Current();
525 int faceID = meshDS->ShapeToIndex( aShapeFace );
526 bool isInternalFace = internals.isInternalShape( faceID );
528 if ( checkReverse && !isInternalFace &&
529 helper.NbAncestors(aShapeFace, aMesh, aShape.ShapeType()) > 1 )
530 // IsReversedSubMesh() can work wrong on strongly curved faces,
531 // so we use it as less as possible
532 isRev = helper.IsReversedSubMesh( TopoDS::Face( aShapeFace ));
534 const SMESHDS_SubMesh * aSubMeshDSFace = proxyMesh->GetSubMesh( aShapeFace );
535 if ( !aSubMeshDSFace ) continue;
537 SMDS_ElemIteratorPtr iteratorElem = aSubMeshDSFace->GetElements();
538 if ( _quadraticMesh &&
539 dynamic_cast< const SMESH_ProxyMesh::SubMesh*>( aSubMeshDSFace ))
541 // add medium nodes of proxy triangles to helper (#16843)
542 while ( iteratorElem->more() )
543 helper.AddTLinks( static_cast< const SMDS_MeshFace* >( iteratorElem->next() ));
545 iteratorElem = aSubMeshDSFace->GetElements();
547 while ( iteratorElem->more() ) // loop on elements on a geom face
550 const SMDS_MeshElement* elem = iteratorElem->next();
552 return error( COMPERR_BAD_INPUT_MESH, "Null element encounters");
553 if ( elem->NbCornerNodes() != 3 )
554 return error( COMPERR_BAD_INPUT_MESH, "Not triangle element encounters");
556 // Add nodes of triangles and triangles them-selves to netgen mesh
558 // add three nodes of triangle
559 bool hasDegen = false;
560 for ( int iN = 0; iN < 3; ++iN )
562 const SMDS_MeshNode* node = elem->GetNode( iN );
563 const int shapeID = node->getshapeId();
564 if ( node->GetPosition()->GetTypeOfPosition() == SMDS_TOP_EDGE &&
565 helper.IsDegenShape( shapeID ))
567 // ignore all nodes on degeneraged edge and use node on its vertex instead
568 TopoDS_Shape vertex = TopoDS_Iterator( meshDS->IndexToShape( shapeID )).Value();
569 node = SMESH_Algo::VertexNode( TopoDS::Vertex( vertex ), meshDS );
572 int& ngID = nodeToNetgenID.insert(TN2ID( node, invalid_ID )).first->second;
573 if ( ngID == invalid_ID )
575 ngID = ++Netgen_NbOfNodes;
576 Netgen_point [ 0 ] = node->X();
577 Netgen_point [ 1 ] = node->Y();
578 Netgen_point [ 2 ] = node->Z();
579 Ng_AddPoint(Netgen_mesh, Netgen_point);
581 Netgen_triangle[ isRev ? 2-iN : iN ] = ngID;
584 if ( hasDegen && (Netgen_triangle[0] == Netgen_triangle[1] ||
585 Netgen_triangle[0] == Netgen_triangle[2] ||
586 Netgen_triangle[2] == Netgen_triangle[1] ))
589 Ng_AddSurfaceElement(Netgen_mesh, NG_TRIG, Netgen_triangle);
591 if ( isInternalFace && !proxyMesh->IsTemporary( elem ))
593 swap( Netgen_triangle[1], Netgen_triangle[2] );
594 Ng_AddSurfaceElement(Netgen_mesh, NG_TRIG, Netgen_triangle);
596 } // loop on elements on a face
597 } // loop on faces of a SOLID or SHELL
599 // insert old nodes into nodeVec
600 nodeVec.resize( nodeToNetgenID.size() + 1, 0 );
601 TNodeToIDMap::iterator n_id = nodeToNetgenID.begin();
602 for ( ; n_id != nodeToNetgenID.end(); ++n_id )
603 nodeVec[ n_id->second ] = n_id->first;
604 nodeToNetgenID.clear();
606 if ( internals.hasInternalVertexInSolid() )
608 netgen::OCCGeometry occgeo;
609 NETGENPlugin_Mesher::AddIntVerticesInSolids( occgeo,
610 (netgen::Mesh&) *Netgen_mesh,
616 // -------------------------
617 // Generate the volume mesh
618 // -------------------------
619 auto time1 = std::chrono::high_resolution_clock::now();
620 auto elapsed = std::chrono::duration_cast<std::chrono::nanoseconds>(time1-time0);
621 std::cout << "Time for seq:fill_in_ngmesh: " << elapsed.count() * 1e-9 << std::endl;
623 return (ngLib._isComputeOk = compute( aMesh, helper, nodeVec, ngLib ));
628 // void limitVolumeSize( netgen::Mesh* ngMesh,
631 // // get average h of faces
634 // for (int i = 1; i <= ngMesh->GetNSE(); i++)
636 // const netgen::Element2d& face = ngMesh->SurfaceElement(i);
637 // for (int j=1; j <= face.GetNP(); ++j)
639 // const netgen::PointIndex & i1 = face.PNumMod(j);
640 // const netgen::PointIndex & i2 = face.PNumMod(j+1);
643 // const netgen::Point3d & p1 = ngMesh->Point( i1 );
644 // const netgen::Point3d & p2 = ngMesh->Point( i2 );
645 // faceh += netgen::Dist2( p1, p2 );
650 // faceh = Sqrt( faceh / nbh );
653 // if ( faceh < 0.5 * maxh ) compareh = -1;
654 // else if ( faceh > 1.5 * maxh ) compareh = 1;
655 // else compareh = 0;
656 // // cerr << "faceh " << faceh << endl;
657 // // cerr << "init maxh " << maxh << endl;
658 // // cerr << "compareh " << compareh << endl;
660 // if ( compareh > 0 )
664 // // cerr << "maxh " << maxh << endl;
667 // netgen::Point3d pmin, pmax;
668 // ngMesh->GetBox( pmin, pmax, 0 );
669 // const double dx = pmax.X() - pmin.X();
670 // const double dy = pmax.Y() - pmin.Y();
671 // const double dz = pmax.Z() - pmin.Z();
673 // if ( ! & ngMesh->LocalHFunction() )
674 // ngMesh->SetLocalH( pmin, pmax, compareh <= 0 ? 0.1 : 0.5 );
676 // // adjusted by SALOME_TESTS/Grids/smesh/bugs_08/I8
677 // const int nbX = Max( 2, int( dx / maxh * 2 ));
678 // const int nbY = Max( 2, int( dy / maxh * 2 ));
679 // const int nbZ = Max( 2, int( dz / maxh * 2 ));
681 // netgen::Point3d p;
682 // for ( int i = 0; i <= nbX; ++i )
684 // p.X() = pmin.X() + i * dx / nbX;
685 // for ( int j = 0; j <= nbY; ++j )
687 // p.Y() = pmin.Y() + j * dy / nbY;
688 // for ( int k = 0; k <= nbZ; ++k )
690 // p.Z() = pmin.Z() + k * dz / nbZ;
691 // ngMesh->RestrictLocalH( p, maxh );
698 //================================================================================
700 * \brief set parameters and generate the volume mesh
702 //================================================================================
704 bool NETGENPlugin_NETGEN_3D::compute(SMESH_Mesh& aMesh,
705 SMESH_MesherHelper& helper,
706 vector< const SMDS_MeshNode* >& nodeVec,
707 NETGENPlugin_NetgenLibWrapper& ngLib)
709 auto time0 = std::chrono::high_resolution_clock::now();
711 netgen::multithread.terminate = 0;
713 netgen::Mesh* ngMesh = ngLib._ngMesh;
714 Ng_Mesh* Netgen_mesh = ngLib.ngMesh();
715 int Netgen_NbOfNodes = Ng_GetNP( Netgen_mesh );
717 int startWith = netgen::MESHCONST_MESHVOLUME;
718 int endWith = netgen::MESHCONST_OPTVOLUME;
721 NETGENPlugin_Mesher aMesher( &aMesh, helper.GetSubShape(), /*isVolume=*/true );
722 netgen::OCCGeometry occgeo;
724 if ( _hypParameters )
726 aMesher.SetParameters( _hypParameters );
728 if ( !_hypParameters->GetLocalSizesAndEntries().empty() ||
729 !_hypParameters->GetMeshSizeFile().empty() )
731 if ( ! &ngMesh->LocalHFunction() )
733 netgen::Point3d pmin, pmax;
734 ngMesh->GetBox( pmin, pmax, 0 );
735 ngMesh->SetLocalH( pmin, pmax, _hypParameters->GetGrowthRate() );
737 aMesher.SetLocalSize( occgeo, *ngMesh );
740 ngMesh->LoadLocalMeshSize( netgen::mparam.meshsizefilename );
741 } catch (netgen::NgException & ex) {
742 return error( COMPERR_BAD_PARMETERS, ex.What() );
745 if ( !_hypParameters->GetOptimize() )
746 endWith = netgen::MESHCONST_MESHVOLUME;
748 else if ( _hypMaxElementVolume )
750 netgen::mparam.maxh = pow( 72, 1/6. ) * pow( _maxElementVolume, 1/3. );
751 // limitVolumeSize( ngMesh, mparam.maxh ); // result is unpredictable
753 else if ( aMesh.HasShapeToMesh() )
755 aMesher.PrepareOCCgeometry( occgeo, helper.GetSubShape(), aMesh );
756 netgen::mparam.maxh = occgeo.GetBoundingBox().Diam()/2;
760 netgen::Point3d pmin, pmax;
761 ngMesh->GetBox (pmin, pmax);
762 netgen::mparam.maxh = Dist(pmin, pmax)/2;
765 if ( !_hypParameters && aMesh.HasShapeToMesh() )
767 netgen::mparam.minh = aMesher.GetDefaultMinSize( helper.GetSubShape(), netgen::mparam.maxh );
773 auto time0 = std::chrono::high_resolution_clock::now();
775 ngLib.CalcLocalH(ngMesh);
776 err = ngLib.GenerateMesh(occgeo, startWith, endWith);
778 if(netgen::multithread.terminate)
781 error(SMESH_Comment("Error in netgen::OCCGenerateMesh() at ") << netgen::multithread.task);
783 catch (Standard_Failure& ex)
785 SMESH_Comment str("Exception in netgen::OCCGenerateMesh()");
786 str << " at " << netgen::multithread.task
787 << ": " << ex.DynamicType()->Name();
788 if ( ex.GetMessageString() && strlen( ex.GetMessageString() ))
789 str << ": " << ex.GetMessageString();
792 catch (netgen::NgException& exc)
794 SMESH_Comment str("NgException");
795 if ( strlen( netgen::multithread.task ) > 0 )
796 str << " at " << netgen::multithread.task;
797 str << ": " << exc.What();
802 SMESH_Comment str("Exception in netgen::OCCGenerateMesh()");
803 if ( strlen( netgen::multithread.task ) > 0 )
804 str << " at " << netgen::multithread.task;
807 auto time1 = std::chrono::high_resolution_clock::now();
808 auto elapsed = std::chrono::duration_cast<std::chrono::nanoseconds>(time1-time0);
809 std::cout << "Time for seq:compute: " << elapsed.count() * 1e-9 << std::endl;
811 int Netgen_NbOfNodesNew = Ng_GetNP(Netgen_mesh);
812 int Netgen_NbOfTetra = Ng_GetNE(Netgen_mesh);
814 // -------------------------------------------------------------------
815 // Feed back the SMESHDS with the generated Nodes and Volume Elements
816 // -------------------------------------------------------------------
820 SMESH_ComputeErrorPtr ce = NETGENPlugin_Mesher::ReadErrors(nodeVec);
821 if ( ce && ce->HasBadElems() )
825 bool isOK = ( /*status == NG_OK &&*/ Netgen_NbOfTetra > 0 );// get whatever built
828 double Netgen_point[3];
829 int Netgen_tetrahedron[4];
831 // create and insert new nodes into nodeVec
832 nodeVec.resize( Netgen_NbOfNodesNew + 1, 0 );
833 int nodeIndex = Netgen_NbOfNodes + 1;
834 for ( ; nodeIndex <= Netgen_NbOfNodesNew; ++nodeIndex )
836 Ng_GetPoint( Netgen_mesh, nodeIndex, Netgen_point );
837 nodeVec.at(nodeIndex) = helper.AddNode(Netgen_point[0], Netgen_point[1], Netgen_point[2]);
840 // create tetrahedrons
841 for ( int elemIndex = 1; elemIndex <= Netgen_NbOfTetra; ++elemIndex )
843 Ng_GetVolumeElement(Netgen_mesh, elemIndex, Netgen_tetrahedron);
846 helper.AddVolume (nodeVec.at( Netgen_tetrahedron[0] ),
847 nodeVec.at( Netgen_tetrahedron[1] ),
848 nodeVec.at( Netgen_tetrahedron[2] ),
849 nodeVec.at( Netgen_tetrahedron[3] ));
856 auto time2 = std::chrono::high_resolution_clock::now();
857 elapsed = std::chrono::duration_cast<std::chrono::nanoseconds>(time2-time1);
858 std::cout << "Time for seq:compute: " << elapsed.count() * 1e-9 << std::endl;
864 //================================================================================
866 * \brief Compute tetrahedral mesh from 2D mesh without geometry
868 //================================================================================
870 bool NETGENPlugin_NETGEN_3D::Compute(SMESH_Mesh& aMesh,
871 SMESH_MesherHelper* aHelper)
873 const int invalid_ID = -1;
875 netgen::multithread.terminate = 0;
876 _progressByTic = -1.;
878 SMESH_MesherHelper::MType MeshType = aHelper->IsQuadraticMesh();
879 if ( MeshType == SMESH_MesherHelper::COMP )
880 return error( COMPERR_BAD_INPUT_MESH,
881 SMESH_Comment("Mesh with linear and quadratic elements given"));
883 aHelper->SetIsQuadratic( MeshType == SMESH_MesherHelper::QUADRATIC );
885 // ---------------------------------
886 // Feed the Netgen with surface mesh
887 // ---------------------------------
889 int Netgen_NbOfNodes = 0;
890 double Netgen_point[3];
891 int Netgen_triangle[3];
893 NETGENPlugin_NetgenLibWrapper ngLib;
894 Ng_Mesh * Netgen_mesh = ngLib.ngMesh();
896 SMESH_ProxyMesh::Ptr proxyMesh( new SMESH_ProxyMesh( aMesh ));
897 if ( aMesh.NbQuadrangles() > 0 )
899 StdMeshers_QuadToTriaAdaptor* Adaptor = new StdMeshers_QuadToTriaAdaptor;
900 Adaptor->Compute(aMesh);
901 proxyMesh.reset( Adaptor );
903 if ( aHelper->IsQuadraticMesh() )
905 SMDS_ElemIteratorPtr fIt = proxyMesh->GetFaces();
907 aHelper->AddTLinks( static_cast< const SMDS_MeshFace* >( fIt->next() ));
911 // maps nodes to ng ID
912 typedef map< const SMDS_MeshNode*, int, TIDCompare > TNodeToIDMap;
913 typedef TNodeToIDMap::value_type TN2ID;
914 TNodeToIDMap nodeToNetgenID;
916 SMDS_ElemIteratorPtr fIt = proxyMesh->GetFaces();
920 const SMDS_MeshElement* elem = fIt->next();
922 return error( COMPERR_BAD_INPUT_MESH, "Null element encounters");
923 if ( elem->NbCornerNodes() != 3 )
924 return error( COMPERR_BAD_INPUT_MESH, "Not triangle element encounters");
926 // add three nodes of triangle
927 for ( int iN = 0; iN < 3; ++iN )
929 const SMDS_MeshNode* node = elem->GetNode( iN );
930 int& ngID = nodeToNetgenID.insert(TN2ID( node, invalid_ID )).first->second;
931 if ( ngID == invalid_ID )
933 ngID = ++Netgen_NbOfNodes;
934 Netgen_point [ 0 ] = node->X();
935 Netgen_point [ 1 ] = node->Y();
936 Netgen_point [ 2 ] = node->Z();
937 Ng_AddPoint(Netgen_mesh, Netgen_point);
939 Netgen_triangle[ iN ] = ngID;
941 Ng_AddSurfaceElement(Netgen_mesh, NG_TRIG, Netgen_triangle);
943 proxyMesh.reset(); // delete tmp faces
945 // vector of nodes in which node index == netgen ID
946 vector< const SMDS_MeshNode* > nodeVec ( nodeToNetgenID.size() + 1 );
947 // insert old nodes into nodeVec
948 TNodeToIDMap::iterator n_id = nodeToNetgenID.begin();
949 for ( ; n_id != nodeToNetgenID.end(); ++n_id )
950 nodeVec.at( n_id->second ) = n_id->first;
951 nodeToNetgenID.clear();
953 // -------------------------
954 // Generate the volume mesh
955 // -------------------------
957 return ( ngLib._isComputeOk = compute( aMesh, *aHelper, nodeVec, ngLib ));
960 void NETGENPlugin_NETGEN_3D::CancelCompute()
962 SMESH_Algo::CancelCompute();
963 netgen::multithread.terminate = 1;
966 //================================================================================
968 * \brief Return Compute progress
970 //================================================================================
972 double NETGENPlugin_NETGEN_3D::GetProgress() const
975 const char* volMeshing = "Volume meshing";
976 const char* dlnMeshing = "Delaunay meshing";
977 const double meshingRatio = 0.15;
978 const_cast<NETGENPlugin_NETGEN_3D*>( this )->_progressTic++;
980 if ( _progressByTic < 0. &&
981 ( strncmp( netgen::multithread.task, dlnMeshing, 3 ) == 0 ||
982 strncmp( netgen::multithread.task, volMeshing, 3 ) == 0 ))
984 res = 0.001 + meshingRatio * netgen::multithread.percent / 100.;
985 //cout << netgen::multithread.task << " " <<_progressTic << "-" << netgen::multithread.percent << endl;
987 else // different otimizations
989 if ( _progressByTic < 0. )
990 ((NETGENPlugin_NETGEN_3D*)this)->_progressByTic = meshingRatio / _progressTic;
991 res = _progressByTic * _progressTic;
992 //cout << netgen::multithread.task << " " << _progressTic << " " << res << endl;
994 return Min ( res, 0.98 );
997 //=============================================================================
1001 //=============================================================================
1003 bool NETGENPlugin_NETGEN_3D::Evaluate(SMESH_Mesh& aMesh,
1004 const TopoDS_Shape& aShape,
1005 MapShapeNbElems& aResMap)
1007 smIdType nbtri = 0, nbqua = 0;
1008 double fullArea = 0.0;
1009 for (TopExp_Explorer expF(aShape, TopAbs_FACE); expF.More(); expF.Next()) {
1010 TopoDS_Face F = TopoDS::Face( expF.Current() );
1011 SMESH_subMesh *sm = aMesh.GetSubMesh(F);
1012 MapShapeNbElemsItr anIt = aResMap.find(sm);
1013 if( anIt==aResMap.end() ) {
1014 SMESH_ComputeErrorPtr& smError = sm->GetComputeError();
1015 smError.reset( new SMESH_ComputeError(COMPERR_ALGO_FAILED,"Submesh can not be evaluated",this));
1018 std::vector<smIdType> aVec = (*anIt).second;
1019 nbtri += std::max(aVec[SMDSEntity_Triangle],aVec[SMDSEntity_Quad_Triangle]);
1020 nbqua += std::max(aVec[SMDSEntity_Quadrangle],aVec[SMDSEntity_Quad_Quadrangle]);
1022 BRepGProp::SurfaceProperties(F,G);
1023 double anArea = G.Mass();
1027 // collect info from edges
1028 smIdType nb0d_e = 0, nb1d_e = 0;
1029 bool IsQuadratic = false;
1030 bool IsFirst = true;
1031 TopTools_MapOfShape tmpMap;
1032 for (TopExp_Explorer expF(aShape, TopAbs_EDGE); expF.More(); expF.Next()) {
1033 TopoDS_Edge E = TopoDS::Edge(expF.Current());
1034 if( tmpMap.Contains(E) )
1037 SMESH_subMesh *aSubMesh = aMesh.GetSubMesh(expF.Current());
1038 MapShapeNbElemsItr anIt = aResMap.find(aSubMesh);
1039 if( anIt==aResMap.end() ) {
1040 SMESH_ComputeErrorPtr& smError = aSubMesh->GetComputeError();
1041 smError.reset( new SMESH_ComputeError(COMPERR_ALGO_FAILED,
1042 "Submesh can not be evaluated",this));
1045 std::vector<smIdType> aVec = (*anIt).second;
1046 nb0d_e += aVec[SMDSEntity_Node];
1047 nb1d_e += std::max(aVec[SMDSEntity_Edge],aVec[SMDSEntity_Quad_Edge]);
1049 IsQuadratic = (aVec[SMDSEntity_Quad_Edge] > aVec[SMDSEntity_Edge]);
1055 double ELen_face = sqrt(2.* ( fullArea/double(nbtri+nbqua*2) ) / sqrt(3.0) );
1056 double ELen_vol = pow( 72, 1/6. ) * pow( _maxElementVolume, 1/3. );
1057 double ELen = Min(ELen_vol,ELen_face*2);
1060 BRepGProp::VolumeProperties(aShape,G);
1061 double aVolume = G.Mass();
1062 double tetrVol = 0.1179*ELen*ELen*ELen;
1063 double CoeffQuality = 0.9;
1064 smIdType nbVols = (smIdType)( aVolume/tetrVol/CoeffQuality );
1065 smIdType nb1d_f = (nbtri*3 + nbqua*4 - nb1d_e) / 2;
1066 smIdType nb1d_in = (nbVols*6 - nb1d_e - nb1d_f ) / 5;
1067 std::vector<smIdType> aVec(SMDSEntity_Last);
1068 for(smIdType i=SMDSEntity_Node; i<SMDSEntity_Last; i++) aVec[i]=0;
1070 aVec[SMDSEntity_Node] = nb1d_in/6 + 1 + nb1d_in;
1071 aVec[SMDSEntity_Quad_Tetra] = nbVols - nbqua*2;
1072 aVec[SMDSEntity_Quad_Pyramid] = nbqua;
1075 aVec[SMDSEntity_Node] = nb1d_in/6 + 1;
1076 aVec[SMDSEntity_Tetra] = nbVols - nbqua*2;
1077 aVec[SMDSEntity_Pyramid] = nbqua;
1079 SMESH_subMesh *sm = aMesh.GetSubMesh(aShape);
1080 aResMap.insert(std::make_pair(sm,aVec));