1 // Copyright (C) 2007-2021 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 <SMDS_MeshElement.hxx>
36 #include <SMDS_MeshNode.hxx>
37 #include <SMESHDS_Mesh.hxx>
38 #include <SMESH_Comment.hxx>
39 #include <SMESH_ControlsDef.hxx>
40 #include <SMESH_Gen.hxx>
41 #include <SMESH_Mesh.hxx>
42 #include <SMESH_MeshEditor.hxx>
43 #include <SMESH_MesherHelper.hxx>
44 #include <SMESH_subMesh.hxx>
45 #include <StdMeshers_MaxElementVolume.hxx>
46 #include <StdMeshers_QuadToTriaAdaptor.hxx>
47 #include <StdMeshers_ViscousLayers.hxx>
49 #include <BRepGProp.hxx>
50 #include <BRep_Tool.hxx>
51 #include <GProp_GProps.hxx>
53 #include <TopExp_Explorer.hxx>
54 #include <TopTools_ListIteratorOfListOfShape.hxx>
57 #include <Standard_Failure.hxx>
58 #include <Standard_ErrorHandler.hxx>
60 #include <utilities.h>
73 #include <occgeom.hpp>
76 #include <ngexception.hpp>
79 #include <exception.hpp>
87 extern int OCCGenerateMesh (OCCGeometry&, Mesh*&, MeshingParameters&, int, int);
89 extern int OCCGenerateMesh (OCCGeometry&, Mesh*&, int, int, char*);
92 NETGENPLUGIN_DLL_HEADER
93 extern MeshingParameters mparam;
95 NETGENPLUGIN_DLL_HEADER
96 extern volatile multithreadt multithread;
98 using namespace nglib;
101 //=============================================================================
105 //=============================================================================
107 NETGENPlugin_NETGEN_3D::NETGENPlugin_NETGEN_3D(int hypId, SMESH_Gen* gen)
108 : SMESH_3D_Algo(hypId, gen)
111 _shapeType = (1 << TopAbs_SHELL) | (1 << TopAbs_SOLID);// 1 bit /shape type
112 _compatibleHypothesis.push_back("MaxElementVolume");
113 _compatibleHypothesis.push_back("NETGEN_Parameters");
114 _compatibleHypothesis.push_back("ViscousLayers");
116 _maxElementVolume = 0.;
118 _hypMaxElementVolume = NULL;
119 _hypParameters = NULL;
120 _viscousLayersHyp = NULL;
122 _requireShape = false; // can work without shape
125 //=============================================================================
129 //=============================================================================
131 NETGENPlugin_NETGEN_3D::~NETGENPlugin_NETGEN_3D()
135 //=============================================================================
139 //=============================================================================
141 bool NETGENPlugin_NETGEN_3D::CheckHypothesis (SMESH_Mesh& aMesh,
142 const TopoDS_Shape& aShape,
143 Hypothesis_Status& aStatus)
145 _hypMaxElementVolume = NULL;
146 _hypParameters = NULL;
147 _viscousLayersHyp = NULL;
148 _maxElementVolume = DBL_MAX;
150 // for correct work of GetProgress():
151 netgen::multithread.percent = 0.;
152 netgen::multithread.task = "Volume meshing";
153 _progressByTic = -1.;
155 list<const SMESHDS_Hypothesis*>::const_iterator itl;
156 //const SMESHDS_Hypothesis* theHyp;
158 const list<const SMESHDS_Hypothesis*>& hyps =
159 GetUsedHypothesis(aMesh, aShape, /*ignoreAuxiliary=*/false);
160 list <const SMESHDS_Hypothesis* >::const_iterator h = hyps.begin();
161 if ( h == hyps.end())
163 aStatus = SMESH_Hypothesis::HYP_OK;
164 return true; // can work with no hypothesis
168 for ( ; h != hyps.end(); ++h )
170 if ( !_hypMaxElementVolume )
171 _hypMaxElementVolume = dynamic_cast< const StdMeshers_MaxElementVolume*> ( *h );
172 if ( !_viscousLayersHyp ) // several _viscousLayersHyp's allowed
173 _viscousLayersHyp = dynamic_cast< const StdMeshers_ViscousLayers*> ( *h );
174 if ( ! _hypParameters )
175 _hypParameters = dynamic_cast< const NETGENPlugin_Hypothesis*> ( *h );
177 if ( *h != _hypMaxElementVolume &&
178 *h != _viscousLayersHyp &&
179 *h != _hypParameters &&
180 !dynamic_cast< const StdMeshers_ViscousLayers*>(*h)) // several VL hyps allowed
181 aStatus = HYP_INCOMPATIBLE;
183 if ( _hypMaxElementVolume && _hypParameters )
184 aStatus = HYP_INCOMPATIBLE;
185 else if ( aStatus == HYP_OK && _viscousLayersHyp )
186 error( _viscousLayersHyp->CheckHypothesis( aMesh, aShape, aStatus ));
188 if ( _hypMaxElementVolume )
189 _maxElementVolume = _hypMaxElementVolume->GetMaxVolume();
191 return aStatus == HYP_OK;
194 //=============================================================================
196 *Here we are going to use the NETGEN mesher
198 //=============================================================================
200 bool NETGENPlugin_NETGEN_3D::Compute(SMESH_Mesh& aMesh,
201 const TopoDS_Shape& aShape)
203 netgen::multithread.terminate = 0;
204 netgen::multithread.task = "Volume meshing";
205 _progressByTic = -1.;
207 SMESHDS_Mesh* meshDS = aMesh.GetMeshDS();
209 SMESH_MesherHelper helper(aMesh);
210 _quadraticMesh = helper.IsQuadraticSubMesh(aShape);
211 helper.SetElementsOnShape( true );
213 int Netgen_NbOfNodes = 0;
214 double Netgen_point[3];
215 int Netgen_triangle[3];
217 NETGENPlugin_NetgenLibWrapper ngLib;
218 Ng_Mesh * Netgen_mesh = (Ng_Mesh*)ngLib._ngMesh;
220 // vector of nodes in which node index == netgen ID
221 vector< const SMDS_MeshNode* > nodeVec;
223 const int invalid_ID = -1;
225 SMESH::Controls::Area areaControl;
226 SMESH::Controls::TSequenceOfXYZ nodesCoords;
228 // maps nodes to ng ID
229 typedef map< const SMDS_MeshNode*, int, TIDCompare > TNodeToIDMap;
230 typedef TNodeToIDMap::value_type TN2ID;
231 TNodeToIDMap nodeToNetgenID;
233 // find internal shapes
234 NETGENPlugin_Internals internals( aMesh, aShape, /*is3D=*/true );
236 // ---------------------------------
237 // Feed the Netgen with surface mesh
238 // ---------------------------------
240 TopAbs_ShapeEnum mainType = aMesh.GetShapeToMesh().ShapeType();
241 bool checkReverse = ( mainType == TopAbs_COMPOUND || mainType == TopAbs_COMPSOLID );
243 SMESH_ProxyMesh::Ptr proxyMesh( new SMESH_ProxyMesh( aMesh ));
244 if ( _viscousLayersHyp )
246 netgen::multithread.percent = 3;
247 proxyMesh = _viscousLayersHyp->Compute( aMesh, aShape );
251 if ( aMesh.NbQuadrangles() > 0 )
253 netgen::multithread.percent = 6;
254 StdMeshers_QuadToTriaAdaptor* Adaptor = new StdMeshers_QuadToTriaAdaptor;
255 Adaptor->Compute(aMesh,aShape,proxyMesh.get());
256 proxyMesh.reset( Adaptor );
259 for ( TopExp_Explorer exFa( aShape, TopAbs_FACE ); exFa.More(); exFa.Next())
261 const TopoDS_Shape& aShapeFace = exFa.Current();
262 int faceID = meshDS->ShapeToIndex( aShapeFace );
263 bool isInternalFace = internals.isInternalShape( faceID );
265 if ( checkReverse && !isInternalFace &&
266 helper.NbAncestors(aShapeFace, aMesh, aShape.ShapeType()) > 1 )
267 // IsReversedSubMesh() can work wrong on strongly curved faces,
268 // so we use it as less as possible
269 isRev = helper.IsReversedSubMesh( TopoDS::Face( aShapeFace ));
271 const SMESHDS_SubMesh * aSubMeshDSFace = proxyMesh->GetSubMesh( aShapeFace );
272 if ( !aSubMeshDSFace ) continue;
274 SMDS_ElemIteratorPtr iteratorElem = aSubMeshDSFace->GetElements();
275 if ( _quadraticMesh &&
276 dynamic_cast< const SMESH_ProxyMesh::SubMesh*>( aSubMeshDSFace ))
278 // add medium nodes of proxy triangles to helper (#16843)
279 while ( iteratorElem->more() )
280 helper.AddTLinks( static_cast< const SMDS_MeshFace* >( iteratorElem->next() ));
282 iteratorElem = aSubMeshDSFace->GetElements();
284 while ( iteratorElem->more() ) // loop on elements on a geom face
287 const SMDS_MeshElement* elem = iteratorElem->next();
289 return error( COMPERR_BAD_INPUT_MESH, "Null element encounters");
290 if ( elem->NbCornerNodes() != 3 )
291 return error( COMPERR_BAD_INPUT_MESH, "Not triangle element encounters");
293 // Add nodes of triangles and triangles them-selves to netgen mesh
295 // add three nodes of triangle
296 bool hasDegen = false;
297 for ( int iN = 0; iN < 3; ++iN )
299 const SMDS_MeshNode* node = elem->GetNode( iN );
300 const int shapeID = node->getshapeId();
301 if ( node->GetPosition()->GetTypeOfPosition() == SMDS_TOP_EDGE &&
302 helper.IsDegenShape( shapeID ))
304 // ignore all nodes on degeneraged edge and use node on its vertex instead
305 TopoDS_Shape vertex = TopoDS_Iterator( meshDS->IndexToShape( shapeID )).Value();
306 node = SMESH_Algo::VertexNode( TopoDS::Vertex( vertex ), meshDS );
309 int& ngID = nodeToNetgenID.insert(TN2ID( node, invalid_ID )).first->second;
310 if ( ngID == invalid_ID )
312 ngID = ++Netgen_NbOfNodes;
313 Netgen_point [ 0 ] = node->X();
314 Netgen_point [ 1 ] = node->Y();
315 Netgen_point [ 2 ] = node->Z();
316 Ng_AddPoint(Netgen_mesh, Netgen_point);
318 Netgen_triangle[ isRev ? 2-iN : iN ] = ngID;
321 if ( hasDegen && (Netgen_triangle[0] == Netgen_triangle[1] ||
322 Netgen_triangle[0] == Netgen_triangle[2] ||
323 Netgen_triangle[2] == Netgen_triangle[1] ))
326 Ng_AddSurfaceElement(Netgen_mesh, NG_TRIG, Netgen_triangle);
328 if ( isInternalFace && !proxyMesh->IsTemporary( elem ))
330 swap( Netgen_triangle[1], Netgen_triangle[2] );
331 Ng_AddSurfaceElement(Netgen_mesh, NG_TRIG, Netgen_triangle);
333 } // loop on elements on a face
334 } // loop on faces of a SOLID or SHELL
336 // insert old nodes into nodeVec
337 nodeVec.resize( nodeToNetgenID.size() + 1, 0 );
338 TNodeToIDMap::iterator n_id = nodeToNetgenID.begin();
339 for ( ; n_id != nodeToNetgenID.end(); ++n_id )
340 nodeVec[ n_id->second ] = n_id->first;
341 nodeToNetgenID.clear();
343 if ( internals.hasInternalVertexInSolid() )
345 netgen::OCCGeometry occgeo;
346 NETGENPlugin_Mesher::AddIntVerticesInSolids( occgeo,
347 (netgen::Mesh&) *Netgen_mesh,
353 // -------------------------
354 // Generate the volume mesh
355 // -------------------------
357 return ( ngLib._isComputeOk = compute( aMesh, helper, nodeVec, ngLib ));
362 // void limitVolumeSize( netgen::Mesh* ngMesh,
365 // // get average h of faces
368 // for (int i = 1; i <= ngMesh->GetNSE(); i++)
370 // const netgen::Element2d& face = ngMesh->SurfaceElement(i);
371 // for (int j=1; j <= face.GetNP(); ++j)
373 // const netgen::PointIndex & i1 = face.PNumMod(j);
374 // const netgen::PointIndex & i2 = face.PNumMod(j+1);
377 // const netgen::Point3d & p1 = ngMesh->Point( i1 );
378 // const netgen::Point3d & p2 = ngMesh->Point( i2 );
379 // faceh += netgen::Dist2( p1, p2 );
384 // faceh = Sqrt( faceh / nbh );
387 // if ( faceh < 0.5 * maxh ) compareh = -1;
388 // else if ( faceh > 1.5 * maxh ) compareh = 1;
389 // else compareh = 0;
390 // // cerr << "faceh " << faceh << endl;
391 // // cerr << "init maxh " << maxh << endl;
392 // // cerr << "compareh " << compareh << endl;
394 // if ( compareh > 0 )
398 // // cerr << "maxh " << maxh << endl;
401 // netgen::Point3d pmin, pmax;
402 // ngMesh->GetBox( pmin, pmax, 0 );
403 // const double dx = pmax.X() - pmin.X();
404 // const double dy = pmax.Y() - pmin.Y();
405 // const double dz = pmax.Z() - pmin.Z();
407 // if ( ! & ngMesh->LocalHFunction() )
408 // ngMesh->SetLocalH( pmin, pmax, compareh <= 0 ? 0.1 : 0.5 );
410 // // adjusted by SALOME_TESTS/Grids/smesh/bugs_08/I8
411 // const int nbX = Max( 2, int( dx / maxh * 2 ));
412 // const int nbY = Max( 2, int( dy / maxh * 2 ));
413 // const int nbZ = Max( 2, int( dz / maxh * 2 ));
415 // netgen::Point3d p;
416 // for ( int i = 0; i <= nbX; ++i )
418 // p.X() = pmin.X() + i * dx / nbX;
419 // for ( int j = 0; j <= nbY; ++j )
421 // p.Y() = pmin.Y() + j * dy / nbY;
422 // for ( int k = 0; k <= nbZ; ++k )
424 // p.Z() = pmin.Z() + k * dz / nbZ;
425 // ngMesh->RestrictLocalH( p, maxh );
432 //================================================================================
434 * \brief set parameters and generate the volume mesh
436 //================================================================================
438 bool NETGENPlugin_NETGEN_3D::compute(SMESH_Mesh& aMesh,
439 SMESH_MesherHelper& helper,
440 vector< const SMDS_MeshNode* >& nodeVec,
441 NETGENPlugin_NetgenLibWrapper& ngLib)
443 netgen::multithread.terminate = 0;
445 netgen::Mesh* ngMesh = ngLib._ngMesh;
446 Ng_Mesh* Netgen_mesh = ngLib.ngMesh();
447 int Netgen_NbOfNodes = Ng_GetNP( Netgen_mesh );
449 int startWith = netgen::MESHCONST_MESHVOLUME;
450 int endWith = netgen::MESHCONST_OPTVOLUME;
453 NETGENPlugin_Mesher aMesher( &aMesh, helper.GetSubShape(), /*isVolume=*/true );
454 netgen::OCCGeometry occgeo;
456 if ( _hypParameters )
458 aMesher.SetParameters( _hypParameters );
460 if ( !_hypParameters->GetLocalSizesAndEntries().empty() ||
461 !_hypParameters->GetMeshSizeFile().empty() )
463 if ( ! &ngMesh->LocalHFunction() )
465 netgen::Point3d pmin, pmax;
466 ngMesh->GetBox( pmin, pmax, 0 );
467 ngMesh->SetLocalH( pmin, pmax, _hypParameters->GetGrowthRate() );
469 aMesher.SetLocalSize( occgeo, *ngMesh );
472 ngMesh->LoadLocalMeshSize( netgen::mparam.meshsizefilename );
473 } catch (netgen::NgException & ex) {
474 return error( COMPERR_BAD_PARMETERS, ex.What() );
477 if ( !_hypParameters->GetOptimize() )
478 endWith = netgen::MESHCONST_MESHVOLUME;
480 else if ( _hypMaxElementVolume )
482 netgen::mparam.maxh = pow( 72, 1/6. ) * pow( _maxElementVolume, 1/3. );
483 // limitVolumeSize( ngMesh, netgen::mparam.maxh ); // result is unpredictable
485 else if ( aMesh.HasShapeToMesh() )
487 aMesher.PrepareOCCgeometry( occgeo, helper.GetSubShape(), aMesh );
488 netgen::mparam.maxh = occgeo.GetBoundingBox().Diam()/2;
492 netgen::Point3d pmin, pmax;
493 ngMesh->GetBox (pmin, pmax);
494 netgen::mparam.maxh = Dist(pmin, pmax)/2;
497 if ( !_hypParameters && aMesh.HasShapeToMesh() )
499 netgen::mparam.minh = aMesher.GetDefaultMinSize( helper.GetSubShape(), netgen::mparam.maxh );
506 ngLib.CalcLocalH(ngMesh);
507 err = ngLib.GenerateMesh(occgeo, startWith, endWith);
509 if(netgen::multithread.terminate)
512 error(SMESH_Comment("Error in netgen::OCCGenerateMesh() at ") << netgen::multithread.task);
514 catch (Standard_Failure& ex)
516 SMESH_Comment str("Exception in netgen::OCCGenerateMesh()");
517 str << " at " << netgen::multithread.task
518 << ": " << ex.DynamicType()->Name();
519 if ( ex.GetMessageString() && strlen( ex.GetMessageString() ))
520 str << ": " << ex.GetMessageString();
523 catch (netgen::NgException& exc)
525 SMESH_Comment str("NgException");
526 if ( strlen( netgen::multithread.task ) > 0 )
527 str << " at " << netgen::multithread.task;
528 str << ": " << exc.What();
533 SMESH_Comment str("Exception in netgen::OCCGenerateMesh()");
534 if ( strlen( netgen::multithread.task ) > 0 )
535 str << " at " << netgen::multithread.task;
539 int Netgen_NbOfNodesNew = Ng_GetNP(Netgen_mesh);
540 int Netgen_NbOfTetra = Ng_GetNE(Netgen_mesh);
542 // -------------------------------------------------------------------
543 // Feed back the SMESHDS with the generated Nodes and Volume Elements
544 // -------------------------------------------------------------------
548 SMESH_ComputeErrorPtr ce = NETGENPlugin_Mesher::ReadErrors(nodeVec);
549 if ( ce && ce->HasBadElems() )
553 bool isOK = ( /*status == NG_OK &&*/ Netgen_NbOfTetra > 0 );// get whatever built
556 double Netgen_point[3];
557 int Netgen_tetrahedron[4];
559 // create and insert new nodes into nodeVec
560 nodeVec.resize( Netgen_NbOfNodesNew + 1, 0 );
561 int nodeIndex = Netgen_NbOfNodes + 1;
562 for ( ; nodeIndex <= Netgen_NbOfNodesNew; ++nodeIndex )
564 Ng_GetPoint( Netgen_mesh, nodeIndex, Netgen_point );
565 nodeVec.at(nodeIndex) = helper.AddNode(Netgen_point[0], Netgen_point[1], Netgen_point[2]);
568 // create tetrahedrons
569 for ( int elemIndex = 1; elemIndex <= Netgen_NbOfTetra; ++elemIndex )
571 Ng_GetVolumeElement(Netgen_mesh, elemIndex, Netgen_tetrahedron);
574 helper.AddVolume (nodeVec.at( Netgen_tetrahedron[0] ),
575 nodeVec.at( Netgen_tetrahedron[1] ),
576 nodeVec.at( Netgen_tetrahedron[2] ),
577 nodeVec.at( Netgen_tetrahedron[3] ));
588 //================================================================================
590 * \brief Compute tetrahedral mesh from 2D mesh without geometry
592 //================================================================================
594 bool NETGENPlugin_NETGEN_3D::Compute(SMESH_Mesh& aMesh,
595 SMESH_MesherHelper* aHelper)
597 const int invalid_ID = -1;
599 netgen::multithread.terminate = 0;
600 _progressByTic = -1.;
602 SMESH_MesherHelper::MType MeshType = aHelper->IsQuadraticMesh();
603 if ( MeshType == SMESH_MesherHelper::COMP )
604 return error( COMPERR_BAD_INPUT_MESH,
605 SMESH_Comment("Mesh with linear and quadratic elements given"));
607 aHelper->SetIsQuadratic( MeshType == SMESH_MesherHelper::QUADRATIC );
609 // ---------------------------------
610 // Feed the Netgen with surface mesh
611 // ---------------------------------
613 int Netgen_NbOfNodes = 0;
614 double Netgen_point[3];
615 int Netgen_triangle[3];
617 NETGENPlugin_NetgenLibWrapper ngLib;
618 Ng_Mesh * Netgen_mesh = ngLib.ngMesh();
620 SMESH_ProxyMesh::Ptr proxyMesh( new SMESH_ProxyMesh( aMesh ));
621 if ( aMesh.NbQuadrangles() > 0 )
623 StdMeshers_QuadToTriaAdaptor* Adaptor = new StdMeshers_QuadToTriaAdaptor;
624 Adaptor->Compute(aMesh);
625 proxyMesh.reset( Adaptor );
627 if ( aHelper->IsQuadraticMesh() )
629 SMDS_ElemIteratorPtr fIt = proxyMesh->GetFaces();
631 aHelper->AddTLinks( static_cast< const SMDS_MeshFace* >( fIt->next() ));
635 // maps nodes to ng ID
636 typedef map< const SMDS_MeshNode*, int, TIDCompare > TNodeToIDMap;
637 typedef TNodeToIDMap::value_type TN2ID;
638 TNodeToIDMap nodeToNetgenID;
640 SMDS_ElemIteratorPtr fIt = proxyMesh->GetFaces();
644 const SMDS_MeshElement* elem = fIt->next();
646 return error( COMPERR_BAD_INPUT_MESH, "Null element encounters");
647 if ( elem->NbCornerNodes() != 3 )
648 return error( COMPERR_BAD_INPUT_MESH, "Not triangle element encounters");
650 // add three nodes of triangle
651 for ( int iN = 0; iN < 3; ++iN )
653 const SMDS_MeshNode* node = elem->GetNode( iN );
654 int& ngID = nodeToNetgenID.insert(TN2ID( node, invalid_ID )).first->second;
655 if ( ngID == invalid_ID )
657 ngID = ++Netgen_NbOfNodes;
658 Netgen_point [ 0 ] = node->X();
659 Netgen_point [ 1 ] = node->Y();
660 Netgen_point [ 2 ] = node->Z();
661 Ng_AddPoint(Netgen_mesh, Netgen_point);
663 Netgen_triangle[ iN ] = ngID;
665 Ng_AddSurfaceElement(Netgen_mesh, NG_TRIG, Netgen_triangle);
667 proxyMesh.reset(); // delete tmp faces
669 // vector of nodes in which node index == netgen ID
670 vector< const SMDS_MeshNode* > nodeVec ( nodeToNetgenID.size() + 1 );
671 // insert old nodes into nodeVec
672 TNodeToIDMap::iterator n_id = nodeToNetgenID.begin();
673 for ( ; n_id != nodeToNetgenID.end(); ++n_id )
674 nodeVec.at( n_id->second ) = n_id->first;
675 nodeToNetgenID.clear();
677 // -------------------------
678 // Generate the volume mesh
679 // -------------------------
681 return ( ngLib._isComputeOk = compute( aMesh, *aHelper, nodeVec, ngLib ));
684 void NETGENPlugin_NETGEN_3D::CancelCompute()
686 SMESH_Algo::CancelCompute();
687 netgen::multithread.terminate = 1;
690 //================================================================================
692 * \brief Return Compute progress
694 //================================================================================
696 double NETGENPlugin_NETGEN_3D::GetProgress() const
699 const char* volMeshing = "Volume meshing";
700 const char* dlnMeshing = "Delaunay meshing";
701 const double meshingRatio = 0.15;
702 const_cast<NETGENPlugin_NETGEN_3D*>( this )->_progressTic++;
704 if ( _progressByTic < 0. &&
705 ( strncmp( netgen::multithread.task, dlnMeshing, 3 ) == 0 ||
706 strncmp( netgen::multithread.task, volMeshing, 3 ) == 0 ))
708 res = 0.001 + meshingRatio * netgen::multithread.percent / 100.;
709 //cout << netgen::multithread.task << " " <<_progressTic << "-" << netgen::multithread.percent << endl;
711 else // different otimizations
713 if ( _progressByTic < 0. )
714 ((NETGENPlugin_NETGEN_3D*)this)->_progressByTic = meshingRatio / _progressTic;
715 res = _progressByTic * _progressTic;
716 //cout << netgen::multithread.task << " " << _progressTic << " " << res << endl;
718 return Min ( res, 0.98 );
721 //=============================================================================
725 //=============================================================================
727 bool NETGENPlugin_NETGEN_3D::Evaluate(SMESH_Mesh& aMesh,
728 const TopoDS_Shape& aShape,
729 MapShapeNbElems& aResMap)
731 smIdType nbtri = 0, nbqua = 0;
732 double fullArea = 0.0;
733 for (TopExp_Explorer expF(aShape, TopAbs_FACE); expF.More(); expF.Next()) {
734 TopoDS_Face F = TopoDS::Face( expF.Current() );
735 SMESH_subMesh *sm = aMesh.GetSubMesh(F);
736 MapShapeNbElemsItr anIt = aResMap.find(sm);
737 if( anIt==aResMap.end() ) {
738 SMESH_ComputeErrorPtr& smError = sm->GetComputeError();
739 smError.reset( new SMESH_ComputeError(COMPERR_ALGO_FAILED,"Submesh can not be evaluated",this));
742 std::vector<smIdType> aVec = (*anIt).second;
743 nbtri += std::max(aVec[SMDSEntity_Triangle],aVec[SMDSEntity_Quad_Triangle]);
744 nbqua += std::max(aVec[SMDSEntity_Quadrangle],aVec[SMDSEntity_Quad_Quadrangle]);
746 BRepGProp::SurfaceProperties(F,G);
747 double anArea = G.Mass();
751 // collect info from edges
752 smIdType nb0d_e = 0, nb1d_e = 0;
753 bool IsQuadratic = false;
755 TopTools_MapOfShape tmpMap;
756 for (TopExp_Explorer expF(aShape, TopAbs_EDGE); expF.More(); expF.Next()) {
757 TopoDS_Edge E = TopoDS::Edge(expF.Current());
758 if( tmpMap.Contains(E) )
761 SMESH_subMesh *aSubMesh = aMesh.GetSubMesh(expF.Current());
762 MapShapeNbElemsItr anIt = aResMap.find(aSubMesh);
763 if( anIt==aResMap.end() ) {
764 SMESH_ComputeErrorPtr& smError = aSubMesh->GetComputeError();
765 smError.reset( new SMESH_ComputeError(COMPERR_ALGO_FAILED,
766 "Submesh can not be evaluated",this));
769 std::vector<smIdType> aVec = (*anIt).second;
770 nb0d_e += aVec[SMDSEntity_Node];
771 nb1d_e += std::max(aVec[SMDSEntity_Edge],aVec[SMDSEntity_Quad_Edge]);
773 IsQuadratic = (aVec[SMDSEntity_Quad_Edge] > aVec[SMDSEntity_Edge]);
779 double ELen_face = sqrt(2.* ( fullArea/double(nbtri+nbqua*2) ) / sqrt(3.0) );
780 double ELen_vol = pow( 72, 1/6. ) * pow( _maxElementVolume, 1/3. );
781 double ELen = Min(ELen_vol,ELen_face*2);
784 BRepGProp::VolumeProperties(aShape,G);
785 double aVolume = G.Mass();
786 double tetrVol = 0.1179*ELen*ELen*ELen;
787 double CoeffQuality = 0.9;
788 smIdType nbVols = (smIdType)( aVolume/tetrVol/CoeffQuality );
789 smIdType nb1d_f = (nbtri*3 + nbqua*4 - nb1d_e) / 2;
790 smIdType nb1d_in = (nbVols*6 - nb1d_e - nb1d_f ) / 5;
791 std::vector<smIdType> aVec(SMDSEntity_Last);
792 for(smIdType i=SMDSEntity_Node; i<SMDSEntity_Last; i++) aVec[i]=0;
794 aVec[SMDSEntity_Node] = nb1d_in/6 + 1 + nb1d_in;
795 aVec[SMDSEntity_Quad_Tetra] = nbVols - nbqua*2;
796 aVec[SMDSEntity_Quad_Pyramid] = nbqua;
799 aVec[SMDSEntity_Node] = nb1d_in/6 + 1;
800 aVec[SMDSEntity_Tetra] = nbVols - nbqua*2;
801 aVec[SMDSEntity_Pyramid] = nbqua;
803 SMESH_subMesh *sm = aMesh.GetSubMesh(aShape);
804 aResMap.insert(std::make_pair(sm,aVec));