1 // Copyright (C) 2007-2022 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"
28 #include "NETGENPlugin_Provider.hxx"
30 #include <SMDS_MeshElement.hxx>
31 #include <SMDS_MeshNode.hxx>
32 #include <SMESHDS_Mesh.hxx>
33 #include <SMESH_Comment.hxx>
34 #include <SMESH_Gen.hxx>
35 #include <SMESH_Mesh.hxx>
36 #include <SMESH_MesherHelper.hxx>
37 #include <SMESH_subMesh.hxx>
38 #include <StdMeshers_FaceSide.hxx>
39 #include <StdMeshers_LengthFromEdges.hxx>
40 #include <StdMeshers_MaxElementArea.hxx>
41 #include <StdMeshers_QuadranglePreference.hxx>
42 #include <StdMeshers_ViscousLayers2D.hxx>
44 #include <Precision.hxx>
45 #include <Standard_ErrorHandler.hxx>
46 #include <Standard_Failure.hxx>
48 #include <utilities.h>
63 #include <occgeom.hpp>
64 #include <meshing.hpp>
65 //#include <meshtype.hpp>
67 NETGENPLUGIN_DLL_HEADER
68 // extern MeshingParameters mparam;
70 extern void OCCSetLocalMeshSize(OCCGeometry & geom, Mesh & mesh);
75 using namespace netgen;
76 using namespace nglib;
79 //=============================================================================
83 //=============================================================================
85 NETGENPlugin_NETGEN_2D_ONLY::NETGENPlugin_NETGEN_2D_ONLY(int hypId,
87 : SMESH_2D_Algo(hypId, gen)
89 _name = "NETGEN_2D_ONLY";
91 _shapeType = (1 << TopAbs_FACE);// 1 bit /shape type
92 _onlyUnaryInput = false; // treat all FACEs at once
94 _compatibleHypothesis.push_back("MaxElementArea");
95 _compatibleHypothesis.push_back("LengthFromEdges");
96 _compatibleHypothesis.push_back("QuadranglePreference");
97 _compatibleHypothesis.push_back("NETGEN_Parameters_2D");
98 _compatibleHypothesis.push_back("ViscousLayers2D");
100 _hypMaxElementArea = 0;
101 _hypLengthFromEdges = 0;
102 _hypQuadranglePreference = 0;
106 //=============================================================================
110 //=============================================================================
112 NETGENPlugin_NETGEN_2D_ONLY::~NETGENPlugin_NETGEN_2D_ONLY()
114 //MESSAGE("NETGENPlugin_NETGEN_2D_ONLY::~NETGENPlugin_NETGEN_2D_ONLY");
117 //=============================================================================
121 //=============================================================================
123 bool NETGENPlugin_NETGEN_2D_ONLY::CheckHypothesis (SMESH_Mesh& aMesh,
124 const TopoDS_Shape& aShape,
125 Hypothesis_Status& aStatus)
127 _hypMaxElementArea = 0;
128 _hypLengthFromEdges = 0;
129 _hypQuadranglePreference = 0;
134 const list<const SMESHDS_Hypothesis*>& hyps = GetUsedHypothesis(aMesh, aShape, false);
138 aStatus = HYP_OK; //SMESH_Hypothesis::HYP_MISSING;
139 return true; // (PAL13464) can work with no hypothesis, LengthFromEdges is default one
142 aStatus = HYP_MISSING;
145 list<const SMESHDS_Hypothesis*>::const_iterator ith;
146 for (ith = hyps.begin(); ith != hyps.end(); ++ith )
148 const SMESHDS_Hypothesis* hyp = (*ith);
150 string hypName = hyp->GetName();
152 if ( hypName == "MaxElementArea")
153 _hypMaxElementArea = static_cast<const StdMeshers_MaxElementArea*> (hyp);
154 else if ( hypName == "LengthFromEdges" )
155 _hypLengthFromEdges = static_cast<const StdMeshers_LengthFromEdges*> (hyp);
156 else if ( hypName == "QuadranglePreference" )
157 _hypQuadranglePreference = static_cast<const StdMeshers_QuadranglePreference*>(hyp);
158 else if ( hypName == "NETGEN_Parameters_2D" )
159 _hypParameters = static_cast<const NETGENPlugin_Hypothesis_2D*>(hyp);
160 else if ( hypName == StdMeshers_ViscousLayers2D::GetHypType() )
163 aStatus = HYP_INCOMPATIBLE;
168 int nbHyps = bool(_hypMaxElementArea) + bool(_hypLengthFromEdges) + bool(_hypParameters );
170 aStatus = HYP_CONCURRENT;
172 error( StdMeshers_ViscousLayers2D::CheckHypothesis( aMesh, aShape, aStatus ));
176 if ( aStatus == HYP_OK && _hypParameters && _hypQuadranglePreference )
178 aStatus = HYP_INCOMPAT_HYPS;
179 return error(SMESH_Comment("\"") << _hypQuadranglePreference->GetName()
180 << "\" and \"" << _hypParameters->GetName()
181 << "\" are incompatible hypotheses");
184 return ( aStatus == HYP_OK );
189 // void limitSize( netgen::Mesh* ngMesh,
190 // const double maxh )
193 // netgen::Point3d pmin, pmax;
194 // ngMesh->GetBox( pmin, pmax, 0 );
195 // const double dx = pmax.X() - pmin.X();
196 // const double dy = pmax.Y() - pmin.Y();
197 // const double dz = pmax.Z() - pmin.Z();
199 // const int nbX = Max( 2, int( dx / maxh * 3 ));
200 // const int nbY = Max( 2, int( dy / maxh * 3 ));
201 // const int nbZ = Max( 2, int( dz / maxh * 3 ));
203 // if ( ! & ngMesh->LocalHFunction() )
204 // ngMesh->SetLocalH( pmin, pmax, 0.1 );
206 // netgen::Point3d p;
207 // for ( int i = 0; i <= nbX; ++i )
209 // p.X() = pmin.X() + i * dx / nbX;
210 // for ( int j = 0; j <= nbY; ++j )
212 // p.Y() = pmin.Y() + j * dy / nbY;
213 // for ( int k = 0; k <= nbZ; ++k )
215 // p.Z() = pmin.Z() + k * dz / nbZ;
216 // ngMesh->RestrictLocalH( p, maxh );
223 //=============================================================================
225 *Here we are going to use the NETGEN mesher
227 //=============================================================================
229 bool NETGENPlugin_NETGEN_2D_ONLY::Compute(SMESH_Mesh& aMesh,
230 const TopoDS_Shape& aShape)
233 SMESH_Hypothesis::Hypothesis_Status hypStatus;
234 this->CheckHypothesis(aMesh, aShape, hypStatus);
237 netgen::MeshingParameters mparam;
238 int id_mparam = mparam_provider.take(mparam);
240 netgen::multithread.terminate = 0;
241 //netgen::multithread.task = "Surface meshing";
243 SMESHDS_Mesh* meshDS = aMesh.GetMeshDS();
244 SMESH_MesherHelper helper(aMesh);
245 helper.SetElementsOnShape( true );
247 NETGENPlugin_NetgenLibWrapper *ngLib;
248 int id_ngLib = nglib_provider.take(&ngLib);
249 ngLib->_isComputeOk = false;
251 netgen::Mesh ngMeshNoLocSize;
252 netgen::Mesh * ngMeshes[2] = { (netgen::Mesh*) ngLib->_ngMesh, & ngMeshNoLocSize };
253 netgen::OCCGeometry *occgeoComm;
254 int id_occgeoComm = occgeom_provider.take(&occgeoComm);
256 // min / max sizes are set as follows:
257 // if ( _hypParameters )
258 // min and max are defined by the user
259 // else if ( _hypLengthFromEdges )
260 // min = aMesher.GetDefaultMinSize()
261 // max = average segment len of a FACE
262 // else if ( _hypMaxElementArea )
263 // min = aMesher.GetDefaultMinSize()
264 // max = f( _hypMaxElementArea )
266 // min = aMesher.GetDefaultMinSize()
267 // max = max segment len of a FACE
269 NETGENPlugin_Mesher aMesher( &aMesh, aShape, /*isVolume=*/false);
270 // TODO: Only valid for NETGEN2D_Only
271 aMesher.SetDefaultParameters(mparam);
272 aMesher.SetParameters( _hypParameters, mparam ); // _hypParameters -> mparam
273 const bool toOptimize = _hypParameters ? _hypParameters->GetOptimize() : true;
274 if ( _hypMaxElementArea )
276 mparam.maxh = sqrt( 2. * _hypMaxElementArea->GetMaxArea() / sqrt(3.0) );
278 if ( _hypQuadranglePreference )
281 // local size is common for all FACEs in aShape?
282 const bool isCommonLocalSize = ( !_hypLengthFromEdges && !_hypMaxElementArea && mparam.uselocalh );
283 const bool isDefaultHyp = ( !_hypLengthFromEdges && !_hypMaxElementArea && !_hypParameters );
287 if ( isCommonLocalSize ) // compute common local size in ngMeshes[0]
289 //list< SMESH_subMesh* > meshedSM[4]; --> all sub-shapes are added to occgeoComm
290 aMesher.PrepareOCCgeometry( *occgeoComm, aShape, aMesh );//, meshedSM );
292 // local size set at MESHCONST_ANALYSE step depends on
293 // minh, face_maxh, grading and curvaturesafety; find minh if not set by the user
294 if ( !_hypParameters || mparam.minh < DBL_MIN )
296 if ( !_hypParameters )
297 mparam.maxh = occgeoComm->GetBoundingBox().Diam() / 3.;
298 mparam.minh = aMesher.GetDefaultMinSize( aShape, mparam.maxh );
300 // set local size depending on curvature and NOT closeness of EDGEs
302 const double factor = 2; //netgen::occparam.resthcloseedgefac;
304 const double factor = netgen::occparam.resthcloseedgefac;
305 netgen::occparam.resthcloseedgeenable = false;
306 netgen::occparam.resthcloseedgefac = 1.0 + mparam.grading;
308 occgeoComm->face_maxh = mparam.maxh;
310 netgen::OCCParameters occparam;
311 netgen::OCCSetLocalMeshSize( *occgeoComm, *ngMeshes[0], mparam, occparam );
314 netgen::OCCSetLocalMeshSize( *occgeoComm, *ngMeshes[0] );
317 occgeoComm->emap.Clear();
318 occgeoComm->vmap.Clear();
320 // set local size according to size of existing segments
321 TopTools_IndexedMapOfShape edgeMap;
322 TopExp::MapShapes( aMesh.GetShapeToMesh(), TopAbs_EDGE, edgeMap );
323 for ( int iE = 1; iE <= edgeMap.Extent(); ++iE )
325 const TopoDS_Shape& edge = edgeMap( iE );
326 if ( SMESH_Algo::isDegenerated( TopoDS::Edge( edge )))
328 SMESHDS_SubMesh* smDS = meshDS->MeshElements( edge );
329 if ( !smDS ) continue;
330 SMDS_ElemIteratorPtr segIt = smDS->GetElements();
331 while ( segIt->more() )
333 const SMDS_MeshElement* seg = segIt->next();
334 SMESH_TNodeXYZ n1 = seg->GetNode(0);
335 SMESH_TNodeXYZ n2 = seg->GetNode(1);
336 gp_XYZ p = 0.5 * ( n1 + n2 );
337 netgen::Point3d pi(p.X(), p.Y(), p.Z());
338 ngMeshes[0]->RestrictLocalH( pi, factor * ( n1 - n2 ).Modulus() );
342 // set local size defined on shapes
343 aMesher.SetLocalSize( *occgeoComm, *ngMeshes[0] );
344 aMesher.SetLocalSizeForChordalError( *occgeoComm, *ngMeshes[0] );
346 ngMeshes[0]->LoadLocalMeshSize( mparam.meshsizefilename );
347 } catch (NgException & ex) {
348 return error( COMPERR_BAD_PARMETERS, ex.What() );
351 mparam.uselocalh = toOptimize; // restore as it is used at surface optimization
352 // ==================
354 // ==================
356 vector< const SMDS_MeshNode* > nodeVec;
358 TopExp_Explorer fExp( aShape, TopAbs_FACE );
359 for ( int iF = 0; fExp.More(); fExp.Next(), ++iF )
361 TopoDS_Face F = TopoDS::Face( fExp.Current() /*.Oriented( TopAbs_FORWARD )*/);
362 int faceID = meshDS->ShapeToIndex( F );
363 SMESH_ComputeErrorPtr& faceErr = aMesh.GetSubMesh( F )->GetComputeError();
365 _quadraticMesh = helper.IsQuadraticSubMesh( F );
366 const bool ignoreMediumNodes = _quadraticMesh;
368 // build viscous layers if required
369 if ( F.Orientation() != TopAbs_FORWARD &&
370 F.Orientation() != TopAbs_REVERSED )
371 F.Orientation( TopAbs_FORWARD ); // avoid pb with TopAbs_INTERNAL
372 SMESH_ProxyMesh::Ptr proxyMesh = StdMeshers_ViscousLayers2D::Compute( aMesh, F );
376 // ------------------------
377 // get all EDGEs of a FACE
378 // ------------------------
380 StdMeshers_FaceSide::GetFaceWires( F, aMesh, ignoreMediumNodes, faceErr, &helper, proxyMesh );
381 if ( faceErr && !faceErr->IsOK() )
383 size_t nbWires = wires.size();
387 ( new SMESH_ComputeError
388 ( COMPERR_ALGO_FAILED, "Problem in StdMeshers_FaceSide::GetFaceWires()" ));
391 if ( wires[0]->NbSegments() < 3 ) // ex: a circle with 2 segments
394 ( new SMESH_ComputeError
395 ( COMPERR_BAD_INPUT_MESH, SMESH_Comment("Too few segments: ")<<wires[0]->NbSegments()) );
399 // ----------------------
400 // compute maxh of a FACE
401 // ----------------------
403 if ( !_hypParameters )
405 double edgeLength = 0;
406 if (_hypLengthFromEdges )
408 // compute edgeLength as an average segment length
409 smIdType nbSegments = 0;
410 for ( size_t iW = 0; iW < nbWires; ++iW )
412 edgeLength += wires[ iW ]->Length();
413 nbSegments += wires[ iW ]->NbSegments();
416 edgeLength /= double( nbSegments );
417 mparam.maxh = edgeLength;
419 else if ( isDefaultHyp )
421 // set edgeLength by a longest segment
423 for ( size_t iW = 0; iW < nbWires; ++iW )
425 const UVPtStructVec& points = wires[ iW ]->GetUVPtStruct();
426 if ( points.empty() )
427 return error( COMPERR_BAD_INPUT_MESH );
428 gp_Pnt pPrev = SMESH_TNodeXYZ( points[0].node );
429 for ( size_t i = 1; i < points.size(); ++i )
431 gp_Pnt p = SMESH_TNodeXYZ( points[i].node );
432 maxSeg2 = Max( maxSeg2, p.SquareDistance( pPrev ));
436 edgeLength = sqrt( maxSeg2 ) * 1.05;
437 mparam.maxh = edgeLength;
439 if ( mparam.maxh < DBL_MIN )
440 mparam.maxh = occgeoComm->GetBoundingBox().Diam();
442 if ( !isCommonLocalSize )
444 mparam.minh = aMesher.GetDefaultMinSize( F, mparam.maxh );
449 netgen::OCCGeometry *occgeom;
450 int id_occgeom = occgeom_provider.take(&occgeom);
452 occgeom->fmap.Add( F );
453 occgeom->CalcBoundingBox();
454 occgeom->facemeshstatus.SetSize(1);
455 occgeom->facemeshstatus = 0;
456 occgeom->face_maxh_modified.SetSize(1);
457 occgeom->face_maxh_modified = 0;
458 occgeom->face_maxh.SetSize(1);
459 occgeom->face_maxh = mparam.maxh;
461 // -------------------------
463 // -------------------------
465 // MESHCONST_ANALYSE step may lead to a failure, so we make an attempt
466 // w/o MESHCONST_ANALYSE at the second loop
468 enum { LOC_SIZE, NO_LOC_SIZE };
469 int iLoop = isCommonLocalSize ? 0 : 1;
470 for ( ; iLoop < 2; iLoop++ )
472 //bool isMESHCONST_ANALYSE = false;
475 netgen::Mesh * ngMesh = ngMeshes[ iLoop ];
476 ngMesh->DeleteMesh();
478 if ( iLoop == NO_LOC_SIZE )
480 ngMesh->SetGlobalH ( mparam.maxh );
481 ngMesh->SetMinimalH( mparam.minh );
482 Box<3> bb = occgeom->GetBoundingBox();
483 bb.Increase (bb.Diam()/10);
484 ngMesh->SetLocalH (bb.PMin(), bb.PMax(), mparam.grading);
485 aMesher.SetLocalSize( *occgeom, *ngMesh );
486 aMesher.SetLocalSizeForChordalError( *occgeoComm, *ngMesh );
488 ngMesh->LoadLocalMeshSize( mparam.meshsizefilename );
489 } catch (NgException & ex) {
490 return error( COMPERR_BAD_PARMETERS, ex.What() );
495 faceErr = aMesher.AddSegmentsToMesh( *ngMesh, *occgeom, wires, helper, nodeVec,
496 /*overrideMinH=*/!_hypParameters);
497 if ( faceErr && !faceErr->IsOK() )
500 //if ( !isCommonLocalSize )
501 //limitSize( ngMesh, mparam.maxh * 0.8);
503 // -------------------------
504 // Generate surface mesh
505 // -------------------------
507 const int startWith = MESHCONST_MESHSURFACE;
508 const int endWith = toOptimize ? MESHCONST_OPTSURFACE : MESHCONST_MESHSURFACE;
513 err = ngLib->GenerateMesh(*occgeom, startWith, endWith, ngMesh, mparam);
514 if ( netgen::multithread.terminate )
517 str << "Error in netgen::OCCGenerateMesh() at " << netgen::multithread.task;
519 catch (Standard_Failure& ex)
522 str << "Exception in netgen::OCCGenerateMesh()"
523 << " at " << netgen::multithread.task
524 << ": " << ex.DynamicType()->Name();
525 if ( ex.GetMessageString() && strlen( ex.GetMessageString() ))
526 str << ": " << ex.GetMessageString();
530 str << "Exception in netgen::OCCGenerateMesh()"
531 << " at " << netgen::multithread.task;
535 if ( aMesher.FixFaceMesh( *occgeom, *ngMesh, 1 ))
537 if ( iLoop == LOC_SIZE )
539 mparam.minh = mparam.maxh;
541 for ( size_t iW = 0; iW < wires.size(); ++iW )
543 StdMeshers_FaceSidePtr wire = wires[ iW ];
544 const vector<UVPtStruct>& uvPtVec = wire->GetUVPtStruct();
545 for ( size_t iP = 1; iP < uvPtVec.size(); ++iP )
547 SMESH_TNodeXYZ p( uvPtVec[ iP ].node );
548 netgen::Point3d np( p.X(),p.Y(),p.Z());
549 double segLen = p.Distance( uvPtVec[ iP-1 ].node );
550 double size = ngMesh->GetH( np );
551 mparam.minh = Min( mparam.minh, size );
552 mparam.maxh = Max( mparam.maxh, segLen );
555 //cerr << "min " << mparam.minh << " max " << mparam.maxh << endl;
562 faceErr.reset( new SMESH_ComputeError( COMPERR_ALGO_FAILED, str ));
566 occgeom_provider.release(id_occgeoComm, true);
567 occgeom_provider.release(id_occgeom, true);
568 mparam_provider.release(id_mparam);
570 // ----------------------------------------------------
571 // Fill the SMESHDS with the generated nodes and faces
572 // ----------------------------------------------------
574 int nbNodes = ngMesh->GetNP();
575 int nbFaces = ngMesh->GetNSE();
577 int nbInputNodes = (int) nodeVec.size()-1;
578 nodeVec.resize( nbNodes+1, 0 );
581 for ( int ngID = nbInputNodes + 1; ngID <= nbNodes; ++ngID )
583 const MeshPoint& ngPoint = ngMesh->Point( ngID );
584 SMDS_MeshNode * node = meshDS->AddNode(ngPoint(0), ngPoint(1), ngPoint(2));
585 nodeVec[ ngID ] = node;
590 vector<const SMDS_MeshNode*> nodes;
591 for ( i = 1; i <= nbFaces ; ++i )
593 const Element2d& elem = ngMesh->SurfaceElement(i);
594 nodes.resize( elem.GetNP() );
595 for (j=1; j <= elem.GetNP(); ++j)
597 int pind = elem.PNum(j);
600 nodes[ j-1 ] = nodeVec[ pind ];
601 if ( nodes[ j-1 ]->GetPosition()->GetTypeOfPosition() == SMDS_TOP_3DSPACE )
603 const PointGeomInfo& pgi = elem.GeomInfoPi(j);
604 meshDS->SetNodeOnFace( nodes[ j-1 ], faceID, pgi.u, pgi.v);
607 if ( j > elem.GetNP() )
609 if ( elem.GetType() == TRIG )
610 helper.AddFace(nodes[0],nodes[1],nodes[2]);
612 helper.AddFace(nodes[0],nodes[1],nodes[2],nodes[3]);
620 nglib_provider.release(id_ngLib, true);
626 void NETGENPlugin_NETGEN_2D_ONLY::CancelCompute()
628 SMESH_Algo::CancelCompute();
629 netgen::multithread.terminate = 1;
632 //================================================================================
634 * \brief Return progress of Compute() [0.,1]
636 //================================================================================
638 double NETGENPlugin_NETGEN_2D_ONLY::GetProgress() const
641 // const char* task1 = "Surface meshing";
642 // //const char* task2 = "Optimizing surface";
643 // double& progress = const_cast<NETGENPlugin_NETGEN_2D_ONLY*>( this )->_progress;
644 // if ( _progressByTic < 0. &&
645 // strncmp( netgen::multithread.task, task1, 3 ) == 0 )
647 // progress = Min( 0.25, SMESH_Algo::GetProgressByTic() ); // [0, 0.25]
649 // else //if ( strncmp( netgen::multithread.task, task2, 3 ) == 0)
651 // if ( _progressByTic < 0 )
653 // NETGENPlugin_NETGEN_2D_ONLY* me = (NETGENPlugin_NETGEN_2D_ONLY*) this;
654 // me->_progressByTic = 0.25 / (_progressTic+1);
656 // const_cast<NETGENPlugin_NETGEN_2D_ONLY*>( this )->_progressTic++;
657 // progress = Max( progress, _progressByTic * _progressTic );
659 // //cout << netgen::multithread.task << " " << _progressTic << endl;
660 // return Min( progress, 0.99 );
663 //=============================================================================
667 //=============================================================================
669 bool NETGENPlugin_NETGEN_2D_ONLY::Evaluate(SMESH_Mesh& aMesh,
670 const TopoDS_Shape& aShape,
671 MapShapeNbElems& aResMap)
673 TopoDS_Face F = TopoDS::Face(aShape);
677 // collect info from edges
678 smIdType nb0d = 0, nb1d = 0;
679 bool IsQuadratic = false;
681 double fullLen = 0.0;
682 TopTools_MapOfShape tmpMap;
683 for (TopExp_Explorer exp(F, TopAbs_EDGE); exp.More(); exp.Next()) {
684 TopoDS_Edge E = TopoDS::Edge(exp.Current());
685 if( tmpMap.Contains(E) )
688 SMESH_subMesh *aSubMesh = aMesh.GetSubMesh(exp.Current());
689 MapShapeNbElemsItr anIt = aResMap.find(aSubMesh);
690 if( anIt==aResMap.end() ) {
691 SMESH_subMesh *sm = aMesh.GetSubMesh(F);
692 SMESH_ComputeErrorPtr& smError = sm->GetComputeError();
693 smError.reset( new SMESH_ComputeError(COMPERR_ALGO_FAILED,"Submesh can not be evaluated",this));
696 std::vector<smIdType> aVec = (*anIt).second;
697 nb0d += aVec[SMDSEntity_Node];
698 nb1d += std::max(aVec[SMDSEntity_Edge],aVec[SMDSEntity_Quad_Edge]);
699 double aLen = SMESH_Algo::EdgeLength(E);
702 IsQuadratic = (aVec[SMDSEntity_Quad_Edge] > aVec[SMDSEntity_Edge]);
708 // compute edge length
710 if (( _hypLengthFromEdges ) || ( !_hypLengthFromEdges && !_hypMaxElementArea )) {
712 ELen = fullLen / double( nb1d );
714 if ( _hypMaxElementArea ) {
715 double maxArea = _hypMaxElementArea->GetMaxArea();
716 ELen = sqrt(2. * maxArea/sqrt(3.0));
719 BRepGProp::SurfaceProperties(F,G);
720 double anArea = G.Mass();
722 const int hugeNb = numeric_limits<int>::max()/10;
723 if ( anArea / hugeNb > ELen*ELen )
725 SMESH_subMesh *sm = aMesh.GetSubMesh(F);
726 SMESH_ComputeErrorPtr& smError = sm->GetComputeError();
727 smError.reset( new SMESH_ComputeError(COMPERR_ALGO_FAILED,"Submesh can not be evaluated.\nToo small element length",this));
730 smIdType nbFaces = (smIdType) ( anArea / ( ELen*ELen*sqrt(3.) / 4 ) );
731 smIdType nbNodes = (smIdType) ( ( nbFaces*3 - (nb1d-1)*2 ) / 6 + 1 );
732 std::vector<smIdType> aVec(SMDSEntity_Last);
733 for(smIdType i=SMDSEntity_Node; i<SMDSEntity_Last; i++) aVec[i]=0;
735 aVec[SMDSEntity_Node] = nbNodes;
736 aVec[SMDSEntity_Quad_Triangle] = nbFaces;
739 aVec[SMDSEntity_Node] = nbNodes;
740 aVec[SMDSEntity_Triangle] = nbFaces;
742 SMESH_subMesh *sm = aMesh.GetSubMesh(F);
743 aResMap.insert(std::make_pair(sm,aVec));