1 // Copyright (C) 2007-2019 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>
74 #include <ngexception.hpp>
80 extern int OCCGenerateMesh (OCCGeometry&, Mesh*&, MeshingParameters&, int, int);
82 extern int OCCGenerateMesh (OCCGeometry&, Mesh*&, int, int, char*);
85 NETGENPLUGIN_DLL_HEADER
86 extern MeshingParameters mparam;
88 NETGENPLUGIN_DLL_HEADER
89 extern volatile multithreadt multithread;
91 using namespace nglib;
94 //=============================================================================
98 //=============================================================================
100 NETGENPlugin_NETGEN_3D::NETGENPlugin_NETGEN_3D(int hypId, SMESH_Gen* gen)
101 : SMESH_3D_Algo(hypId, gen)
104 _shapeType = (1 << TopAbs_SHELL) | (1 << TopAbs_SOLID);// 1 bit /shape type
105 _compatibleHypothesis.push_back("MaxElementVolume");
106 _compatibleHypothesis.push_back("NETGEN_Parameters");
107 _compatibleHypothesis.push_back("ViscousLayers");
109 _maxElementVolume = 0.;
111 _hypMaxElementVolume = NULL;
112 _hypParameters = NULL;
113 _viscousLayersHyp = NULL;
115 _requireShape = false; // can work without shape
118 //=============================================================================
122 //=============================================================================
124 NETGENPlugin_NETGEN_3D::~NETGENPlugin_NETGEN_3D()
128 //=============================================================================
132 //=============================================================================
134 bool NETGENPlugin_NETGEN_3D::CheckHypothesis (SMESH_Mesh& aMesh,
135 const TopoDS_Shape& aShape,
136 Hypothesis_Status& aStatus)
138 _hypMaxElementVolume = NULL;
139 _hypParameters = NULL;
140 _viscousLayersHyp = NULL;
141 _maxElementVolume = DBL_MAX;
143 // for correct work of GetProgress():
144 netgen::multithread.percent = 0.;
145 netgen::multithread.task = "Volume meshing";
146 _progressByTic = -1.;
148 list<const SMESHDS_Hypothesis*>::const_iterator itl;
149 //const SMESHDS_Hypothesis* theHyp;
151 const list<const SMESHDS_Hypothesis*>& hyps =
152 GetUsedHypothesis(aMesh, aShape, /*ignoreAuxiliary=*/false);
153 list <const SMESHDS_Hypothesis* >::const_iterator h = hyps.begin();
154 if ( h == hyps.end())
156 aStatus = SMESH_Hypothesis::HYP_OK;
157 return true; // can work with no hypothesis
161 for ( ; h != hyps.end(); ++h )
163 if ( !_hypMaxElementVolume )
164 _hypMaxElementVolume = dynamic_cast< const StdMeshers_MaxElementVolume*> ( *h );
165 if ( !_viscousLayersHyp ) // several _viscousLayersHyp's allowed
166 _viscousLayersHyp = dynamic_cast< const StdMeshers_ViscousLayers*> ( *h );
167 if ( ! _hypParameters )
168 _hypParameters = dynamic_cast< const NETGENPlugin_Hypothesis*> ( *h );
170 if ( *h != _hypMaxElementVolume &&
171 *h != _viscousLayersHyp &&
172 *h != _hypParameters &&
173 !dynamic_cast< const StdMeshers_ViscousLayers*>(*h)) // several VL hyps allowed
174 aStatus = HYP_INCOMPATIBLE;
176 if ( _hypMaxElementVolume && _hypParameters )
177 aStatus = HYP_INCOMPATIBLE;
178 else if ( aStatus == HYP_OK && _viscousLayersHyp )
179 error( _viscousLayersHyp->CheckHypothesis( aMesh, aShape, aStatus ));
181 if ( _hypMaxElementVolume )
182 _maxElementVolume = _hypMaxElementVolume->GetMaxVolume();
184 return aStatus == HYP_OK;
187 //=============================================================================
189 *Here we are going to use the NETGEN mesher
191 //=============================================================================
193 bool NETGENPlugin_NETGEN_3D::Compute(SMESH_Mesh& aMesh,
194 const TopoDS_Shape& aShape)
196 netgen::multithread.terminate = 0;
197 netgen::multithread.task = "Volume meshing";
198 _progressByTic = -1.;
200 SMESHDS_Mesh* meshDS = aMesh.GetMeshDS();
202 SMESH_MesherHelper helper(aMesh);
203 _quadraticMesh = helper.IsQuadraticSubMesh(aShape);
204 helper.SetElementsOnShape( true );
206 int Netgen_NbOfNodes = 0;
207 double Netgen_point[3];
208 int Netgen_triangle[3];
210 NETGENPlugin_NetgenLibWrapper ngLib;
211 Ng_Mesh * Netgen_mesh = ngLib._ngMesh;
213 // vector of nodes in which node index == netgen ID
214 vector< const SMDS_MeshNode* > nodeVec;
216 const int invalid_ID = -1;
218 SMESH::Controls::Area areaControl;
219 SMESH::Controls::TSequenceOfXYZ nodesCoords;
221 // maps nodes to ng ID
222 typedef map< const SMDS_MeshNode*, int, TIDCompare > TNodeToIDMap;
223 typedef TNodeToIDMap::value_type TN2ID;
224 TNodeToIDMap nodeToNetgenID;
226 // find internal shapes
227 NETGENPlugin_Internals internals( aMesh, aShape, /*is3D=*/true );
229 // ---------------------------------
230 // Feed the Netgen with surface mesh
231 // ---------------------------------
233 TopAbs_ShapeEnum mainType = aMesh.GetShapeToMesh().ShapeType();
234 bool checkReverse = ( mainType == TopAbs_COMPOUND || mainType == TopAbs_COMPSOLID );
236 SMESH_ProxyMesh::Ptr proxyMesh( new SMESH_ProxyMesh( aMesh ));
237 if ( _viscousLayersHyp )
239 netgen::multithread.percent = 3;
240 proxyMesh = _viscousLayersHyp->Compute( aMesh, aShape );
244 if ( aMesh.NbQuadrangles() > 0 )
246 netgen::multithread.percent = 6;
247 StdMeshers_QuadToTriaAdaptor* Adaptor = new StdMeshers_QuadToTriaAdaptor;
248 Adaptor->Compute(aMesh,aShape,proxyMesh.get());
249 proxyMesh.reset( Adaptor );
252 for ( TopExp_Explorer exFa( aShape, TopAbs_FACE ); exFa.More(); exFa.Next())
254 const TopoDS_Shape& aShapeFace = exFa.Current();
255 int faceID = meshDS->ShapeToIndex( aShapeFace );
256 bool isInternalFace = internals.isInternalShape( faceID );
258 if ( checkReverse && !isInternalFace &&
259 helper.NbAncestors(aShapeFace, aMesh, aShape.ShapeType()) > 1 )
260 // IsReversedSubMesh() can work wrong on strongly curved faces,
261 // so we use it as less as possible
262 isRev = helper.IsReversedSubMesh( TopoDS::Face( aShapeFace ));
264 const SMESHDS_SubMesh * aSubMeshDSFace = proxyMesh->GetSubMesh( aShapeFace );
265 if ( !aSubMeshDSFace ) continue;
267 SMDS_ElemIteratorPtr iteratorElem = aSubMeshDSFace->GetElements();
268 if ( _quadraticMesh &&
269 dynamic_cast< const SMESH_ProxyMesh::SubMesh*>( aSubMeshDSFace ))
271 // add medium nodes of proxy triangles to helper (#16843)
272 while ( iteratorElem->more() )
273 helper.AddTLinks( static_cast< const SMDS_MeshFace* >( iteratorElem->next() ));
275 iteratorElem = aSubMeshDSFace->GetElements();
277 while ( iteratorElem->more() ) // loop on elements on a geom face
280 const SMDS_MeshElement* elem = iteratorElem->next();
282 return error( COMPERR_BAD_INPUT_MESH, "Null element encounters");
283 if ( elem->NbCornerNodes() != 3 )
284 return error( COMPERR_BAD_INPUT_MESH, "Not triangle element encounters");
286 // Add nodes of triangles and triangles them-selves to netgen mesh
288 // add three nodes of triangle
289 bool hasDegen = false;
290 for ( int iN = 0; iN < 3; ++iN )
292 const SMDS_MeshNode* node = elem->GetNode( iN );
293 const int shapeID = node->getshapeId();
294 if ( node->GetPosition()->GetTypeOfPosition() == SMDS_TOP_EDGE &&
295 helper.IsDegenShape( shapeID ))
297 // ignore all nodes on degeneraged edge and use node on its vertex instead
298 TopoDS_Shape vertex = TopoDS_Iterator( meshDS->IndexToShape( shapeID )).Value();
299 node = SMESH_Algo::VertexNode( TopoDS::Vertex( vertex ), meshDS );
302 int& ngID = nodeToNetgenID.insert(TN2ID( node, invalid_ID )).first->second;
303 if ( ngID == invalid_ID )
305 ngID = ++Netgen_NbOfNodes;
306 Netgen_point [ 0 ] = node->X();
307 Netgen_point [ 1 ] = node->Y();
308 Netgen_point [ 2 ] = node->Z();
309 Ng_AddPoint(Netgen_mesh, Netgen_point);
311 Netgen_triangle[ isRev ? 2-iN : iN ] = ngID;
314 if ( hasDegen && (Netgen_triangle[0] == Netgen_triangle[1] ||
315 Netgen_triangle[0] == Netgen_triangle[2] ||
316 Netgen_triangle[2] == Netgen_triangle[1] ))
319 Ng_AddSurfaceElement(Netgen_mesh, NG_TRIG, Netgen_triangle);
321 if ( isInternalFace && !proxyMesh->IsTemporary( elem ))
323 swap( Netgen_triangle[1], Netgen_triangle[2] );
324 Ng_AddSurfaceElement(Netgen_mesh, NG_TRIG, Netgen_triangle);
326 } // loop on elements on a face
327 } // loop on faces of a SOLID or SHELL
329 // insert old nodes into nodeVec
330 nodeVec.resize( nodeToNetgenID.size() + 1, 0 );
331 TNodeToIDMap::iterator n_id = nodeToNetgenID.begin();
332 for ( ; n_id != nodeToNetgenID.end(); ++n_id )
333 nodeVec[ n_id->second ] = n_id->first;
334 nodeToNetgenID.clear();
336 if ( internals.hasInternalVertexInSolid() )
338 netgen::OCCGeometry occgeo;
339 NETGENPlugin_Mesher::AddIntVerticesInSolids( occgeo,
340 (netgen::Mesh&) *Netgen_mesh,
346 // -------------------------
347 // Generate the volume mesh
348 // -------------------------
350 return ( ngLib._isComputeOk = compute( aMesh, helper, nodeVec, Netgen_mesh));
355 // void limitVolumeSize( netgen::Mesh* ngMesh,
358 // // get average h of faces
361 // for (int i = 1; i <= ngMesh->GetNSE(); i++)
363 // const netgen::Element2d& face = ngMesh->SurfaceElement(i);
364 // for (int j=1; j <= face.GetNP(); ++j)
366 // const netgen::PointIndex & i1 = face.PNumMod(j);
367 // const netgen::PointIndex & i2 = face.PNumMod(j+1);
370 // const netgen::Point3d & p1 = ngMesh->Point( i1 );
371 // const netgen::Point3d & p2 = ngMesh->Point( i2 );
372 // faceh += netgen::Dist2( p1, p2 );
377 // faceh = Sqrt( faceh / nbh );
380 // if ( faceh < 0.5 * maxh ) compareh = -1;
381 // else if ( faceh > 1.5 * maxh ) compareh = 1;
382 // else compareh = 0;
383 // // cerr << "faceh " << faceh << endl;
384 // // cerr << "init maxh " << maxh << endl;
385 // // cerr << "compareh " << compareh << endl;
387 // if ( compareh > 0 )
391 // // cerr << "maxh " << maxh << endl;
394 // netgen::Point3d pmin, pmax;
395 // ngMesh->GetBox( pmin, pmax, 0 );
396 // const double dx = pmax.X() - pmin.X();
397 // const double dy = pmax.Y() - pmin.Y();
398 // const double dz = pmax.Z() - pmin.Z();
400 // if ( ! & ngMesh->LocalHFunction() )
401 // ngMesh->SetLocalH( pmin, pmax, compareh <= 0 ? 0.1 : 0.5 );
403 // // adjusted by SALOME_TESTS/Grids/smesh/bugs_08/I8
404 // const int nbX = Max( 2, int( dx / maxh * 2 ));
405 // const int nbY = Max( 2, int( dy / maxh * 2 ));
406 // const int nbZ = Max( 2, int( dz / maxh * 2 ));
408 // netgen::Point3d p;
409 // for ( int i = 0; i <= nbX; ++i )
411 // p.X() = pmin.X() + i * dx / nbX;
412 // for ( int j = 0; j <= nbY; ++j )
414 // p.Y() = pmin.Y() + j * dy / nbY;
415 // for ( int k = 0; k <= nbZ; ++k )
417 // p.Z() = pmin.Z() + k * dz / nbZ;
418 // ngMesh->RestrictLocalH( p, maxh );
425 //================================================================================
427 * \brief set parameters and generate the volume mesh
429 //================================================================================
431 bool NETGENPlugin_NETGEN_3D::compute(SMESH_Mesh& aMesh,
432 SMESH_MesherHelper& helper,
433 vector< const SMDS_MeshNode* >& nodeVec,
434 Ng_Mesh * Netgen_mesh)
436 netgen::multithread.terminate = 0;
438 netgen::Mesh* ngMesh = (netgen::Mesh*)Netgen_mesh;
439 int Netgen_NbOfNodes = Ng_GetNP(Netgen_mesh);
444 int startWith = netgen::MESHCONST_MESHVOLUME;
445 int endWith = netgen::MESHCONST_OPTVOLUME;
448 NETGENPlugin_Mesher aMesher( &aMesh, helper.GetSubShape(), /*isVolume=*/true );
449 netgen::OCCGeometry occgeo;
451 if ( _hypParameters )
453 aMesher.SetParameters( _hypParameters );
455 if ( !_hypParameters->GetLocalSizesAndEntries().empty() ||
456 !_hypParameters->GetMeshSizeFile().empty() )
458 if ( ! &ngMesh->LocalHFunction() )
460 netgen::Point3d pmin, pmax;
461 ngMesh->GetBox( pmin, pmax, 0 );
462 ngMesh->SetLocalH( pmin, pmax, _hypParameters->GetGrowthRate() );
464 aMesher.SetLocalSize( occgeo, *ngMesh );
467 ngMesh->LoadLocalMeshSize( netgen::mparam.meshsizefilename );
468 } catch (netgen::NgException & ex) {
469 return error( COMPERR_BAD_PARMETERS, ex.What() );
472 if ( !_hypParameters->GetOptimize() )
473 endWith = netgen::MESHCONST_MESHVOLUME;
475 else if ( _hypMaxElementVolume )
477 netgen::mparam.maxh = pow( 72, 1/6. ) * pow( _maxElementVolume, 1/3. );
478 // limitVolumeSize( ngMesh, netgen::mparam.maxh ); // result is unpredictable
480 else if ( aMesh.HasShapeToMesh() )
482 aMesher.PrepareOCCgeometry( occgeo, helper.GetSubShape(), aMesh );
483 netgen::mparam.maxh = occgeo.GetBoundingBox().Diam()/2;
487 netgen::Point3d pmin, pmax;
488 ngMesh->GetBox (pmin, pmax);
489 netgen::mparam.maxh = Dist(pmin, pmax)/2;
492 if ( !_hypParameters && aMesh.HasShapeToMesh() )
494 netgen::mparam.minh = aMesher.GetDefaultMinSize( helper.GetSubShape(), netgen::mparam.maxh );
502 ngMesh->CalcLocalH(netgen::mparam.grading);
503 err = netgen::OCCGenerateMesh(occgeo, ngMesh, netgen::mparam, startWith, endWith);
505 ngMesh->CalcLocalH();
506 err = netgen::OCCGenerateMesh(occgeo, ngMesh, startWith, endWith, optstr);
508 if(netgen::multithread.terminate)
511 error(SMESH_Comment("Error in netgen::OCCGenerateMesh() at ") << netgen::multithread.task);
513 catch (Standard_Failure& ex)
515 SMESH_Comment str("Exception in netgen::OCCGenerateMesh()");
516 str << " at " << netgen::multithread.task
517 << ": " << ex.DynamicType()->Name();
518 if ( ex.GetMessageString() && strlen( ex.GetMessageString() ))
519 str << ": " << ex.GetMessageString();
522 catch (netgen::NgException exc)
524 SMESH_Comment str("NgException");
525 if ( strlen( netgen::multithread.task ) > 0 )
526 str << " at " << netgen::multithread.task;
527 str << ": " << exc.What();
532 SMESH_Comment str("Exception in netgen::OCCGenerateMesh()");
533 if ( strlen( netgen::multithread.task ) > 0 )
534 str << " at " << netgen::multithread.task;
538 int Netgen_NbOfNodesNew = Ng_GetNP(Netgen_mesh);
539 int Netgen_NbOfTetra = Ng_GetNE(Netgen_mesh);
541 // -------------------------------------------------------------------
542 // Feed back the SMESHDS with the generated Nodes and Volume Elements
543 // -------------------------------------------------------------------
547 SMESH_ComputeErrorPtr ce = NETGENPlugin_Mesher::ReadErrors(nodeVec);
548 if ( ce && ce->HasBadElems() )
552 bool isOK = ( /*status == NG_OK &&*/ Netgen_NbOfTetra > 0 );// get whatever built
555 double Netgen_point[3];
556 int Netgen_tetrahedron[4];
558 // create and insert new nodes into nodeVec
559 nodeVec.resize( Netgen_NbOfNodesNew + 1, 0 );
560 int nodeIndex = Netgen_NbOfNodes + 1;
561 for ( ; nodeIndex <= Netgen_NbOfNodesNew; ++nodeIndex )
563 Ng_GetPoint( Netgen_mesh, nodeIndex, Netgen_point );
564 nodeVec.at(nodeIndex) = helper.AddNode(Netgen_point[0], Netgen_point[1], Netgen_point[2]);
567 // create tetrahedrons
568 for ( int elemIndex = 1; elemIndex <= Netgen_NbOfTetra; ++elemIndex )
570 Ng_GetVolumeElement(Netgen_mesh, elemIndex, Netgen_tetrahedron);
573 helper.AddVolume (nodeVec.at( Netgen_tetrahedron[0] ),
574 nodeVec.at( Netgen_tetrahedron[1] ),
575 nodeVec.at( Netgen_tetrahedron[2] ),
576 nodeVec.at( Netgen_tetrahedron[3] ));
587 //================================================================================
589 * \brief Compute tetrahedral mesh from 2D mesh without geometry
591 //================================================================================
593 bool NETGENPlugin_NETGEN_3D::Compute(SMESH_Mesh& aMesh,
594 SMESH_MesherHelper* aHelper)
596 const int invalid_ID = -1;
598 netgen::multithread.terminate = 0;
599 _progressByTic = -1.;
601 SMESH_MesherHelper::MType MeshType = aHelper->IsQuadraticMesh();
602 if ( MeshType == SMESH_MesherHelper::COMP )
603 return error( COMPERR_BAD_INPUT_MESH,
604 SMESH_Comment("Mesh with linear and quadratic elements given"));
606 aHelper->SetIsQuadratic( MeshType == SMESH_MesherHelper::QUADRATIC );
608 // ---------------------------------
609 // Feed the Netgen with surface mesh
610 // ---------------------------------
612 int Netgen_NbOfNodes = 0;
613 double Netgen_point[3];
614 int Netgen_triangle[3];
616 NETGENPlugin_NetgenLibWrapper ngLib;
617 Ng_Mesh * Netgen_mesh = ngLib._ngMesh;
619 SMESH_ProxyMesh::Ptr proxyMesh( new SMESH_ProxyMesh( aMesh ));
620 if ( aMesh.NbQuadrangles() > 0 )
622 StdMeshers_QuadToTriaAdaptor* Adaptor = new StdMeshers_QuadToTriaAdaptor;
623 Adaptor->Compute(aMesh);
624 proxyMesh.reset( Adaptor );
626 if ( aHelper->IsQuadraticMesh() )
628 SMDS_ElemIteratorPtr fIt = proxyMesh->GetFaces();
630 aHelper->AddTLinks( static_cast< const SMDS_MeshFace* >( fIt->next() ));
634 // maps nodes to ng ID
635 typedef map< const SMDS_MeshNode*, int, TIDCompare > TNodeToIDMap;
636 typedef TNodeToIDMap::value_type TN2ID;
637 TNodeToIDMap nodeToNetgenID;
639 SMDS_ElemIteratorPtr fIt = proxyMesh->GetFaces();
643 const SMDS_MeshElement* elem = fIt->next();
645 return error( COMPERR_BAD_INPUT_MESH, "Null element encounters");
646 if ( elem->NbCornerNodes() != 3 )
647 return error( COMPERR_BAD_INPUT_MESH, "Not triangle element encounters");
649 // add three nodes of triangle
650 for ( int iN = 0; iN < 3; ++iN )
652 const SMDS_MeshNode* node = elem->GetNode( iN );
653 int& ngID = nodeToNetgenID.insert(TN2ID( node, invalid_ID )).first->second;
654 if ( ngID == invalid_ID )
656 ngID = ++Netgen_NbOfNodes;
657 Netgen_point [ 0 ] = node->X();
658 Netgen_point [ 1 ] = node->Y();
659 Netgen_point [ 2 ] = node->Z();
660 Ng_AddPoint(Netgen_mesh, Netgen_point);
662 Netgen_triangle[ iN ] = ngID;
664 Ng_AddSurfaceElement(Netgen_mesh, NG_TRIG, Netgen_triangle);
666 proxyMesh.reset(); // delete tmp faces
668 // vector of nodes in which node index == netgen ID
669 vector< const SMDS_MeshNode* > nodeVec ( nodeToNetgenID.size() + 1 );
670 // insert old nodes into nodeVec
671 TNodeToIDMap::iterator n_id = nodeToNetgenID.begin();
672 for ( ; n_id != nodeToNetgenID.end(); ++n_id )
673 nodeVec.at( n_id->second ) = n_id->first;
674 nodeToNetgenID.clear();
676 // -------------------------
677 // Generate the volume mesh
678 // -------------------------
680 return ( ngLib._isComputeOk = compute( aMesh, *aHelper, nodeVec, Netgen_mesh));
683 void NETGENPlugin_NETGEN_3D::CancelCompute()
685 SMESH_Algo::CancelCompute();
686 netgen::multithread.terminate = 1;
689 //================================================================================
691 * \brief Return Compute progress
693 //================================================================================
695 double NETGENPlugin_NETGEN_3D::GetProgress() const
698 const char* volMeshing = "Volume meshing";
699 const char* dlnMeshing = "Delaunay meshing";
700 const double meshingRatio = 0.15;
701 const_cast<NETGENPlugin_NETGEN_3D*>( this )->_progressTic++;
703 if ( _progressByTic < 0. &&
704 ( strncmp( netgen::multithread.task, dlnMeshing, 3 ) == 0 ||
705 strncmp( netgen::multithread.task, volMeshing, 3 ) == 0 ))
707 res = 0.001 + meshingRatio * netgen::multithread.percent / 100.;
708 //cout << netgen::multithread.task << " " <<_progressTic << "-" << netgen::multithread.percent << endl;
710 else // different otimizations
712 if ( _progressByTic < 0. )
713 ((NETGENPlugin_NETGEN_3D*)this)->_progressByTic = meshingRatio / _progressTic;
714 res = _progressByTic * _progressTic;
715 //cout << netgen::multithread.task << " " << _progressTic << " " << res << endl;
717 return Min ( res, 0.98 );
720 //=============================================================================
724 //=============================================================================
726 bool NETGENPlugin_NETGEN_3D::Evaluate(SMESH_Mesh& aMesh,
727 const TopoDS_Shape& aShape,
728 MapShapeNbElems& aResMap)
730 int nbtri = 0, nbqua = 0;
731 double fullArea = 0.0;
732 for (TopExp_Explorer expF(aShape, TopAbs_FACE); expF.More(); expF.Next()) {
733 TopoDS_Face F = TopoDS::Face( expF.Current() );
734 SMESH_subMesh *sm = aMesh.GetSubMesh(F);
735 MapShapeNbElemsItr anIt = aResMap.find(sm);
736 if( anIt==aResMap.end() ) {
737 SMESH_ComputeErrorPtr& smError = sm->GetComputeError();
738 smError.reset( new SMESH_ComputeError(COMPERR_ALGO_FAILED,"Submesh can not be evaluated",this));
741 std::vector<int> aVec = (*anIt).second;
742 nbtri += Max(aVec[SMDSEntity_Triangle],aVec[SMDSEntity_Quad_Triangle]);
743 nbqua += Max(aVec[SMDSEntity_Quadrangle],aVec[SMDSEntity_Quad_Quadrangle]);
745 BRepGProp::SurfaceProperties(F,G);
746 double anArea = G.Mass();
750 // collect info from edges
751 int nb0d_e = 0, nb1d_e = 0;
752 bool IsQuadratic = false;
754 TopTools_MapOfShape tmpMap;
755 for (TopExp_Explorer expF(aShape, TopAbs_EDGE); expF.More(); expF.Next()) {
756 TopoDS_Edge E = TopoDS::Edge(expF.Current());
757 if( tmpMap.Contains(E) )
760 SMESH_subMesh *aSubMesh = aMesh.GetSubMesh(expF.Current());
761 MapShapeNbElemsItr anIt = aResMap.find(aSubMesh);
762 if( anIt==aResMap.end() ) {
763 SMESH_ComputeErrorPtr& smError = aSubMesh->GetComputeError();
764 smError.reset( new SMESH_ComputeError(COMPERR_ALGO_FAILED,
765 "Submesh can not be evaluated",this));
768 std::vector<int> aVec = (*anIt).second;
769 nb0d_e += aVec[SMDSEntity_Node];
770 nb1d_e += Max(aVec[SMDSEntity_Edge],aVec[SMDSEntity_Quad_Edge]);
772 IsQuadratic = (aVec[SMDSEntity_Quad_Edge] > aVec[SMDSEntity_Edge]);
778 double ELen_face = sqrt(2.* ( fullArea/(nbtri+nbqua*2) ) / sqrt(3.0) );
779 double ELen_vol = pow( 72, 1/6. ) * pow( _maxElementVolume, 1/3. );
780 double ELen = Min(ELen_vol,ELen_face*2);
783 BRepGProp::VolumeProperties(aShape,G);
784 double aVolume = G.Mass();
785 double tetrVol = 0.1179*ELen*ELen*ELen;
786 double CoeffQuality = 0.9;
787 int nbVols = int( aVolume/tetrVol/CoeffQuality );
788 int nb1d_f = (nbtri*3 + nbqua*4 - nb1d_e) / 2;
789 int nb1d_in = (nbVols*6 - nb1d_e - nb1d_f ) / 5;
790 std::vector<int> aVec(SMDSEntity_Last);
791 for(int i=SMDSEntity_Node; i<SMDSEntity_Last; i++) aVec[i]=0;
793 aVec[SMDSEntity_Node] = nb1d_in/6 + 1 + nb1d_in;
794 aVec[SMDSEntity_Quad_Tetra] = nbVols - nbqua*2;
795 aVec[SMDSEntity_Quad_Pyramid] = nbqua;
798 aVec[SMDSEntity_Node] = nb1d_in/6 + 1;
799 aVec[SMDSEntity_Tetra] = nbVols - nbqua*2;
800 aVec[SMDSEntity_Pyramid] = nbqua;
802 SMESH_subMesh *sm = aMesh.GetSubMesh(aShape);
803 aResMap.insert(std::make_pair(sm,aVec));