1 // Copyright (C) 2007-2016 CEA/DEN, EDF R&D, OPEN CASCADE
3 // This library is free software; you can redistribute it and/or
4 // modify it under the terms of the GNU Lesser General Public
5 // License as published by the Free Software Foundation; either
6 // version 2.1 of the License, or (at your option) any later version.
8 // This library is distributed in the hope that it will be useful,
9 // but WITHOUT ANY WARRANTY; without even the implied warranty of
10 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 // Lesser General Public License for more details.
13 // You should have received a copy of the GNU Lesser General Public
14 // License along with this library; if not, write to the Free Software
15 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17 // See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
20 // File : NETGENPlugin_NETGEN_2D_ONLY.cxx
21 // Author : Edward AGAPOV (OCC)
24 #include "NETGENPlugin_NETGEN_2D_ONLY.hxx"
26 #include "NETGENPlugin_Mesher.hxx"
27 #include "NETGENPlugin_Hypothesis_2D.hxx"
29 #include <SMDS_MeshElement.hxx>
30 #include <SMDS_MeshNode.hxx>
31 #include <SMESHDS_Mesh.hxx>
32 #include <SMESH_Comment.hxx>
33 #include <SMESH_Gen.hxx>
34 #include <SMESH_Mesh.hxx>
35 #include <SMESH_MesherHelper.hxx>
36 #include <SMESH_subMesh.hxx>
37 #include <StdMeshers_FaceSide.hxx>
38 #include <StdMeshers_LengthFromEdges.hxx>
39 #include <StdMeshers_MaxElementArea.hxx>
40 #include <StdMeshers_QuadranglePreference.hxx>
41 #include <StdMeshers_ViscousLayers2D.hxx>
43 #include <Precision.hxx>
44 #include <Standard_ErrorHandler.hxx>
45 #include <Standard_Failure.hxx>
47 #include <utilities.h>
62 #include <occgeom.hpp>
63 #include <meshing.hpp>
64 //#include <meshtype.hpp>
67 extern int OCCGenerateMesh (OCCGeometry&, Mesh*&, MeshingParameters&, int, int);
69 extern int OCCGenerateMesh (OCCGeometry&, Mesh*&, int, int, char*);
71 #if defined(NETGEN_V5) && defined(WIN32)
74 extern MeshingParameters mparam;
75 extern void OCCSetLocalMeshSize(OCCGeometry & geom, Mesh & mesh);
79 using namespace netgen;
80 using namespace nglib;
82 //=============================================================================
86 //=============================================================================
88 NETGENPlugin_NETGEN_2D_ONLY::NETGENPlugin_NETGEN_2D_ONLY(int hypId,
91 : SMESH_2D_Algo(hypId, studyId, gen)
93 _name = "NETGEN_2D_ONLY";
95 _shapeType = (1 << TopAbs_FACE);// 1 bit /shape type
96 _onlyUnaryInput = false; // treat all FACEs at once
98 _compatibleHypothesis.push_back("MaxElementArea");
99 _compatibleHypothesis.push_back("LengthFromEdges");
100 _compatibleHypothesis.push_back("QuadranglePreference");
101 _compatibleHypothesis.push_back("NETGEN_Parameters_2D");
102 _compatibleHypothesis.push_back("ViscousLayers2D");
104 _hypMaxElementArea = 0;
105 _hypLengthFromEdges = 0;
106 _hypQuadranglePreference = 0;
110 //=============================================================================
114 //=============================================================================
116 NETGENPlugin_NETGEN_2D_ONLY::~NETGENPlugin_NETGEN_2D_ONLY()
118 //MESSAGE("NETGENPlugin_NETGEN_2D_ONLY::~NETGENPlugin_NETGEN_2D_ONLY");
121 //=============================================================================
125 //=============================================================================
127 bool NETGENPlugin_NETGEN_2D_ONLY::CheckHypothesis (SMESH_Mesh& aMesh,
128 const TopoDS_Shape& aShape,
129 Hypothesis_Status& aStatus)
131 _hypMaxElementArea = 0;
132 _hypLengthFromEdges = 0;
133 _hypQuadranglePreference = 0;
137 const list<const SMESHDS_Hypothesis*>& hyps = GetUsedHypothesis(aMesh, aShape, false);
141 aStatus = HYP_OK; //SMESH_Hypothesis::HYP_MISSING;
142 return true; // (PAL13464) can work with no hypothesis, LengthFromEdges is default one
145 aStatus = HYP_MISSING;
148 list<const SMESHDS_Hypothesis*>::const_iterator ith;
149 for (ith = hyps.begin(); ith != hyps.end(); ++ith )
151 const SMESHDS_Hypothesis* hyp = (*ith);
153 string hypName = hyp->GetName();
155 if ( hypName == "MaxElementArea")
156 _hypMaxElementArea = static_cast<const StdMeshers_MaxElementArea*> (hyp);
157 else if ( hypName == "LengthFromEdges" )
158 _hypLengthFromEdges = static_cast<const StdMeshers_LengthFromEdges*> (hyp);
159 else if ( hypName == "QuadranglePreference" )
160 _hypQuadranglePreference = static_cast<const StdMeshers_QuadranglePreference*>(hyp);
161 else if ( hypName == "NETGEN_Parameters_2D" )
162 _hypParameters = static_cast<const NETGENPlugin_Hypothesis_2D*>(hyp);
163 else if ( hypName == StdMeshers_ViscousLayers2D::GetHypType() )
166 aStatus = HYP_INCOMPATIBLE;
171 int nbHyps = bool(_hypMaxElementArea) + bool(_hypLengthFromEdges) + bool(_hypParameters );
173 aStatus = HYP_CONCURENT;
175 error( StdMeshers_ViscousLayers2D::CheckHypothesis( aMesh, aShape, aStatus ));
179 if ( aStatus == HYP_OK && _hypParameters && _hypQuadranglePreference )
181 aStatus = HYP_INCOMPAT_HYPS;
182 return error(SMESH_Comment("\"") << _hypQuadranglePreference->GetName()
183 << "\" and \"" << _hypParameters->GetName()
184 << "\" are incompatible hypotheses");
187 return ( aStatus == HYP_OK );
192 // void limitSize( netgen::Mesh* ngMesh,
193 // const double maxh )
196 // netgen::Point3d pmin, pmax;
197 // ngMesh->GetBox( pmin, pmax, 0 );
198 // const double dx = pmax.X() - pmin.X();
199 // const double dy = pmax.Y() - pmin.Y();
200 // const double dz = pmax.Z() - pmin.Z();
202 // const int nbX = Max( 2, int( dx / maxh * 3 ));
203 // const int nbY = Max( 2, int( dy / maxh * 3 ));
204 // const int nbZ = Max( 2, int( dz / maxh * 3 ));
206 // if ( ! & ngMesh->LocalHFunction() )
207 // ngMesh->SetLocalH( pmin, pmax, 0.1 );
209 // netgen::Point3d p;
210 // for ( int i = 0; i <= nbX; ++i )
212 // p.X() = pmin.X() + i * dx / nbX;
213 // for ( int j = 0; j <= nbY; ++j )
215 // p.Y() = pmin.Y() + j * dy / nbY;
216 // for ( int k = 0; k <= nbZ; ++k )
218 // p.Z() = pmin.Z() + k * dz / nbZ;
219 // ngMesh->RestrictLocalH( p, maxh );
226 //=============================================================================
228 *Here we are going to use the NETGEN mesher
230 //=============================================================================
232 bool NETGENPlugin_NETGEN_2D_ONLY::Compute(SMESH_Mesh& aMesh,
233 const TopoDS_Shape& aShape)
235 netgen::multithread.terminate = 0;
236 //netgen::multithread.task = "Surface meshing";
238 SMESHDS_Mesh* meshDS = aMesh.GetMeshDS();
239 SMESH_MesherHelper helper(aMesh);
240 helper.SetElementsOnShape( true );
242 NETGENPlugin_NetgenLibWrapper ngLib;
243 ngLib._isComputeOk = false;
245 netgen::Mesh ngMeshNoLocSize;
246 netgen::Mesh * ngMeshes[2] = { (netgen::Mesh*) ngLib._ngMesh, & ngMeshNoLocSize };
247 netgen::OCCGeometry occgeoComm;
249 // min / max sizes are set as follows:
250 // if ( _hypParameters )
251 // min and max are defined by the user
252 // else if ( _hypLengthFromEdges )
253 // min = aMesher.GetDefaultMinSize()
254 // max = average segment len of a FACE
255 // else if ( _hypMaxElementArea )
256 // min = aMesher.GetDefaultMinSize()
257 // max = f( _hypMaxElementArea )
259 // min = aMesher.GetDefaultMinSize()
260 // max = max segment len of a FACE
262 NETGENPlugin_Mesher aMesher( &aMesh, aShape, /*isVolume=*/false);
263 aMesher.SetParameters( _hypParameters ); // _hypParameters -> netgen::mparam
264 const bool toOptimize = _hypParameters ? _hypParameters->GetOptimize() : true;
265 if ( _hypMaxElementArea )
267 netgen::mparam.maxh = sqrt( 2. * _hypMaxElementArea->GetMaxArea() / sqrt(3.0) );
269 if ( _hypQuadranglePreference )
270 netgen::mparam.quad = true;
272 // local size is common for all FACEs in aShape?
273 const bool isCommonLocalSize = ( !_hypLengthFromEdges && !_hypMaxElementArea && netgen::mparam.uselocalh );
274 const bool isDefaultHyp = ( !_hypLengthFromEdges && !_hypMaxElementArea && !_hypParameters );
276 if ( isCommonLocalSize ) // compute common local size in ngMeshes[0]
278 //list< SMESH_subMesh* > meshedSM[4]; --> all sub-shapes are added to occgeoComm
279 aMesher.PrepareOCCgeometry( occgeoComm, aShape, aMesh );//, meshedSM );
281 // local size set at MESHCONST_ANALYSE step depends on
282 // minh, face_maxh, grading and curvaturesafety; find minh if not set by the user
283 if ( !_hypParameters || netgen::mparam.minh < DBL_MIN )
285 if ( !_hypParameters )
286 netgen::mparam.maxh = occgeoComm.GetBoundingBox().Diam() / 3.;
287 netgen::mparam.minh = aMesher.GetDefaultMinSize( aShape, netgen::mparam.maxh );
289 // set local size depending on curvature and NOT closeness of EDGEs
290 netgen::occparam.resthcloseedgeenable = false;
291 //netgen::occparam.resthcloseedgefac = 1.0 + netgen::mparam.grading;
292 occgeoComm.face_maxh = netgen::mparam.maxh;
293 netgen::OCCSetLocalMeshSize( occgeoComm, *ngMeshes[0] );
294 occgeoComm.emap.Clear();
295 occgeoComm.vmap.Clear();
297 // set local size according to size of existing segments
298 const double factor = netgen::occparam.resthcloseedgefac;
299 TopTools_IndexedMapOfShape edgeMap;
300 TopExp::MapShapes( aMesh.GetShapeToMesh(), TopAbs_EDGE, edgeMap );
301 for ( int iE = 1; iE <= edgeMap.Extent(); ++iE )
303 const TopoDS_Shape& edge = edgeMap( iE );
304 if ( SMESH_Algo::isDegenerated( TopoDS::Edge( edge )))
306 SMESHDS_SubMesh* smDS = meshDS->MeshElements( edge );
307 if ( !smDS ) continue;
308 SMDS_ElemIteratorPtr segIt = smDS->GetElements();
309 while ( segIt->more() )
311 const SMDS_MeshElement* seg = segIt->next();
312 SMESH_TNodeXYZ n1 = seg->GetNode(0);
313 SMESH_TNodeXYZ n2 = seg->GetNode(1);
314 gp_XYZ p = 0.5 * ( n1 + n2 );
315 netgen::Point3d pi(p.X(), p.Y(), p.Z());
316 ngMeshes[0]->RestrictLocalH( pi, factor * ( n1 - n2 ).Modulus() );
320 // set local size defined on shapes
321 aMesher.SetLocalSize( occgeoComm, *ngMeshes[0] );
322 aMesher.SetLocalSizeForChordalError( occgeoComm, *ngMeshes[0] );
324 ngMeshes[0]->LoadLocalMeshSize( mparam.meshsizefilename );
325 } catch (NgException & ex) {
326 return error( COMPERR_BAD_PARMETERS, ex.What() );
329 netgen::mparam.uselocalh = toOptimize; // restore as it is used at surface optimization
331 // ==================
333 // ==================
335 vector< const SMDS_MeshNode* > nodeVec;
337 TopExp_Explorer fExp( aShape, TopAbs_FACE );
338 for ( int iF = 0; fExp.More(); fExp.Next(), ++iF )
340 TopoDS_Face F = TopoDS::Face( fExp.Current() /*.Oriented( TopAbs_FORWARD )*/);
341 int faceID = meshDS->ShapeToIndex( F );
342 SMESH_ComputeErrorPtr& faceErr = aMesh.GetSubMesh( F )->GetComputeError();
344 _quadraticMesh = helper.IsQuadraticSubMesh( F );
345 const bool ignoreMediumNodes = _quadraticMesh;
347 // build viscous layers if required
348 if ( F.Orientation() != TopAbs_FORWARD &&
349 F.Orientation() != TopAbs_REVERSED )
350 F.Orientation( TopAbs_FORWARD ); // avoid pb with TopAbs_INTERNAL
351 SMESH_ProxyMesh::Ptr proxyMesh = StdMeshers_ViscousLayers2D::Compute( aMesh, F );
355 // ------------------------
356 // get all EDGEs of a FACE
357 // ------------------------
359 StdMeshers_FaceSide::GetFaceWires( F, aMesh, ignoreMediumNodes, faceErr, &helper, proxyMesh );
360 if ( faceErr && !faceErr->IsOK() )
362 int nbWires = wires.size();
366 ( new SMESH_ComputeError
367 ( COMPERR_ALGO_FAILED, "Problem in StdMeshers_FaceSide::GetFaceWires()" ));
370 if ( wires[0]->NbSegments() < 3 ) // ex: a circle with 2 segments
373 ( new SMESH_ComputeError
374 ( COMPERR_BAD_INPUT_MESH, SMESH_Comment("Too few segments: ")<<wires[0]->NbSegments()) );
378 // ----------------------
379 // compute maxh of a FACE
380 // ----------------------
382 if ( !_hypParameters )
384 double edgeLength = 0;
385 if (_hypLengthFromEdges )
387 // compute edgeLength as an average segment length
389 for ( int iW = 0; iW < nbWires; ++iW )
391 edgeLength += wires[ iW ]->Length();
392 nbSegments += wires[ iW ]->NbSegments();
395 edgeLength /= nbSegments;
396 netgen::mparam.maxh = edgeLength;
398 else if ( isDefaultHyp )
400 // set edgeLength by a longest segment
402 for ( int iW = 0; iW < nbWires; ++iW )
404 const UVPtStructVec& points = wires[ iW ]->GetUVPtStruct();
405 if ( points.empty() )
406 return error( COMPERR_BAD_INPUT_MESH );
407 gp_Pnt pPrev = SMESH_TNodeXYZ( points[0].node );
408 for ( size_t i = 1; i < points.size(); ++i )
410 gp_Pnt p = SMESH_TNodeXYZ( points[i].node );
411 maxSeg2 = Max( maxSeg2, p.SquareDistance( pPrev ));
415 edgeLength = sqrt( maxSeg2 ) * 1.05;
416 netgen::mparam.maxh = edgeLength;
418 if ( netgen::mparam.maxh < DBL_MIN )
419 netgen::mparam.maxh = occgeoComm.GetBoundingBox().Diam();
421 if ( !isCommonLocalSize )
423 netgen::mparam.minh = aMesher.GetDefaultMinSize( F, netgen::mparam.maxh );
428 netgen::OCCGeometry occgeom;
430 occgeom.fmap.Add( F );
431 occgeom.CalcBoundingBox();
432 occgeom.facemeshstatus.SetSize(1);
433 occgeom.facemeshstatus = 0;
434 occgeom.face_maxh_modified.SetSize(1);
435 occgeom.face_maxh_modified = 0;
436 occgeom.face_maxh.SetSize(1);
437 occgeom.face_maxh = netgen::mparam.maxh;
439 // -------------------------
441 // -------------------------
443 // MESHCONST_ANALYSE step may lead to a failure, so we make an attempt
444 // w/o MESHCONST_ANALYSE at the second loop
446 enum { LOC_SIZE, NO_LOC_SIZE };
447 int iLoop = isCommonLocalSize ? 0 : 1;
448 for ( ; iLoop < 2; iLoop++ )
450 //bool isMESHCONST_ANALYSE = false;
453 netgen::Mesh * ngMesh = ngMeshes[ iLoop ];
454 ngMesh->DeleteMesh();
456 if ( iLoop == NO_LOC_SIZE )
458 ngMesh->SetGlobalH ( mparam.maxh );
459 ngMesh->SetMinimalH( mparam.minh );
460 Box<3> bb = occgeom.GetBoundingBox();
461 bb.Increase (bb.Diam()/10);
462 ngMesh->SetLocalH (bb.PMin(), bb.PMax(), mparam.grading);
463 aMesher.SetLocalSize( occgeom, *ngMesh );
464 aMesher.SetLocalSizeForChordalError( occgeoComm, *ngMesh );
466 ngMesh->LoadLocalMeshSize( mparam.meshsizefilename );
467 } catch (NgException & ex) {
468 return error( COMPERR_BAD_PARMETERS, ex.What() );
473 faceErr = aMesher.AddSegmentsToMesh( *ngMesh, occgeom, wires, helper, nodeVec,
474 /*overrideMinH=*/!_hypParameters);
475 if ( faceErr && !faceErr->IsOK() )
478 //if ( !isCommonLocalSize )
479 //limitSize( ngMesh, mparam.maxh * 0.8);
481 // -------------------------
482 // Generate surface mesh
483 // -------------------------
485 const int startWith = MESHCONST_MESHSURFACE;
486 const int endWith = toOptimize ? MESHCONST_OPTSURFACE : MESHCONST_MESHSURFACE;
493 err = netgen::OCCGenerateMesh(occgeom, ngMesh, netgen::mparam, startWith, endWith);
496 err = netgen::OCCGenerateMesh(occgeom, ngMesh, startWith, endWith, optstr);
498 if ( netgen::multithread.terminate )
501 str << "Error in netgen::OCCGenerateMesh() at " << netgen::multithread.task;
503 catch (Standard_Failure& ex)
506 str << "Exception in netgen::OCCGenerateMesh()"
507 << " at " << netgen::multithread.task
508 << ": " << ex.DynamicType()->Name();
509 if ( ex.GetMessageString() && strlen( ex.GetMessageString() ))
510 str << ": " << ex.GetMessageString();
514 str << "Exception in netgen::OCCGenerateMesh()"
515 << " at " << netgen::multithread.task;
519 if ( aMesher.FixFaceMesh( occgeom, *ngMesh, 1 ))
521 if ( iLoop == LOC_SIZE )
523 netgen::mparam.minh = netgen::mparam.maxh;
524 netgen::mparam.maxh = 0;
525 for ( size_t iW = 0; iW < wires.size(); ++iW )
527 StdMeshers_FaceSidePtr wire = wires[ iW ];
528 const vector<UVPtStruct>& uvPtVec = wire->GetUVPtStruct();
529 for ( size_t iP = 1; iP < uvPtVec.size(); ++iP )
531 SMESH_TNodeXYZ p( uvPtVec[ iP ].node );
532 netgen::Point3d np( p.X(),p.Y(),p.Z());
533 double segLen = p.Distance( uvPtVec[ iP-1 ].node );
534 double size = ngMesh->GetH( np );
535 netgen::mparam.minh = Min( netgen::mparam.minh, size );
536 netgen::mparam.maxh = Max( netgen::mparam.maxh, segLen );
539 //cerr << "min " << netgen::mparam.minh << " max " << netgen::mparam.maxh << endl;
540 netgen::mparam.minh *= 0.9;
541 netgen::mparam.maxh *= 1.1;
546 faceErr.reset( new SMESH_ComputeError( COMPERR_ALGO_FAILED, str ));
551 // ----------------------------------------------------
552 // Fill the SMESHDS with the generated nodes and faces
553 // ----------------------------------------------------
555 int nbNodes = ngMesh->GetNP();
556 int nbFaces = ngMesh->GetNSE();
558 int nbInputNodes = nodeVec.size()-1;
559 nodeVec.resize( nbNodes+1, 0 );
562 for ( int ngID = nbInputNodes + 1; ngID <= nbNodes; ++ngID )
564 const MeshPoint& ngPoint = ngMesh->Point( ngID );
565 SMDS_MeshNode * node = meshDS->AddNode(ngPoint(0), ngPoint(1), ngPoint(2));
566 nodeVec[ ngID ] = node;
571 vector<const SMDS_MeshNode*> nodes;
572 for ( i = 1; i <= nbFaces ; ++i )
574 const Element2d& elem = ngMesh->SurfaceElement(i);
575 nodes.resize( elem.GetNP() );
576 for (j=1; j <= elem.GetNP(); ++j)
578 int pind = elem.PNum(j);
581 nodes[ j-1 ] = nodeVec[ pind ];
582 if ( nodes[ j-1 ]->GetPosition()->GetTypeOfPosition() == SMDS_TOP_3DSPACE )
584 const PointGeomInfo& pgi = elem.GeomInfoPi(j);
585 meshDS->SetNodeOnFace( nodes[ j-1 ], faceID, pgi.u, pgi.v);
588 if ( j > elem.GetNP() )
590 if ( elem.GetType() == TRIG )
591 helper.AddFace(nodes[0],nodes[1],nodes[2]);
593 helper.AddFace(nodes[0],nodes[1],nodes[2],nodes[3]);
604 void NETGENPlugin_NETGEN_2D_ONLY::CancelCompute()
606 SMESH_Algo::CancelCompute();
607 netgen::multithread.terminate = 1;
610 //================================================================================
612 * \brief Return progress of Compute() [0.,1]
614 //================================================================================
616 double NETGENPlugin_NETGEN_2D_ONLY::GetProgress() const
619 // const char* task1 = "Surface meshing";
620 // //const char* task2 = "Optimizing surface";
621 // double& progress = const_cast<NETGENPlugin_NETGEN_2D_ONLY*>( this )->_progress;
622 // if ( _progressByTic < 0. &&
623 // strncmp( netgen::multithread.task, task1, 3 ) == 0 )
625 // progress = Min( 0.25, SMESH_Algo::GetProgressByTic() ); // [0, 0.25]
627 // else //if ( strncmp( netgen::multithread.task, task2, 3 ) == 0)
629 // if ( _progressByTic < 0 )
631 // NETGENPlugin_NETGEN_2D_ONLY* me = (NETGENPlugin_NETGEN_2D_ONLY*) this;
632 // me->_progressByTic = 0.25 / (_progressTic+1);
634 // const_cast<NETGENPlugin_NETGEN_2D_ONLY*>( this )->_progressTic++;
635 // progress = Max( progress, _progressByTic * _progressTic );
637 // //cout << netgen::multithread.task << " " << _progressTic << endl;
638 // return Min( progress, 0.99 );
641 //=============================================================================
645 //=============================================================================
647 bool NETGENPlugin_NETGEN_2D_ONLY::Evaluate(SMESH_Mesh& aMesh,
648 const TopoDS_Shape& aShape,
649 MapShapeNbElems& aResMap)
651 TopoDS_Face F = TopoDS::Face(aShape);
655 // collect info from edges
656 int nb0d = 0, nb1d = 0;
657 bool IsQuadratic = false;
659 double fullLen = 0.0;
660 TopTools_MapOfShape tmpMap;
661 for (TopExp_Explorer exp(F, TopAbs_EDGE); exp.More(); exp.Next()) {
662 TopoDS_Edge E = TopoDS::Edge(exp.Current());
663 if( tmpMap.Contains(E) )
666 SMESH_subMesh *aSubMesh = aMesh.GetSubMesh(exp.Current());
667 MapShapeNbElemsItr anIt = aResMap.find(aSubMesh);
668 if( anIt==aResMap.end() ) {
669 SMESH_subMesh *sm = aMesh.GetSubMesh(F);
670 SMESH_ComputeErrorPtr& smError = sm->GetComputeError();
671 smError.reset( new SMESH_ComputeError(COMPERR_ALGO_FAILED,"Submesh can not be evaluated",this));
674 std::vector<int> aVec = (*anIt).second;
675 nb0d += aVec[SMDSEntity_Node];
676 nb1d += Max(aVec[SMDSEntity_Edge],aVec[SMDSEntity_Quad_Edge]);
677 double aLen = SMESH_Algo::EdgeLength(E);
680 IsQuadratic = (aVec[SMDSEntity_Quad_Edge] > aVec[SMDSEntity_Edge]);
686 // compute edge length
688 if (( _hypLengthFromEdges ) || ( !_hypLengthFromEdges && !_hypMaxElementArea )) {
690 ELen = fullLen / nb1d;
692 if ( _hypMaxElementArea ) {
693 double maxArea = _hypMaxElementArea->GetMaxArea();
694 ELen = sqrt(2. * maxArea/sqrt(3.0));
697 BRepGProp::SurfaceProperties(F,G);
698 double anArea = G.Mass();
700 const int hugeNb = numeric_limits<int>::max()/10;
701 if ( anArea / hugeNb > ELen*ELen )
703 SMESH_subMesh *sm = aMesh.GetSubMesh(F);
704 SMESH_ComputeErrorPtr& smError = sm->GetComputeError();
705 smError.reset( new SMESH_ComputeError(COMPERR_ALGO_FAILED,"Submesh can not be evaluated.\nToo small element length",this));
708 int nbFaces = (int) ( anArea / ( ELen*ELen*sqrt(3.) / 4 ) );
709 int nbNodes = (int) ( ( nbFaces*3 - (nb1d-1)*2 ) / 6 + 1 );
710 std::vector<int> aVec(SMDSEntity_Last);
711 for(int i=SMDSEntity_Node; i<SMDSEntity_Last; i++) aVec[i]=0;
713 aVec[SMDSEntity_Node] = nbNodes;
714 aVec[SMDSEntity_Quad_Triangle] = nbFaces;
717 aVec[SMDSEntity_Node] = nbNodes;
718 aVec[SMDSEntity_Triangle] = nbFaces;
720 SMESH_subMesh *sm = aMesh.GetSubMesh(F);
721 aResMap.insert(std::make_pair(sm,aVec));