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;
78 //=============================================================================
82 //=============================================================================
84 NETGENPlugin_NETGEN_2D_ONLY::NETGENPlugin_NETGEN_2D_ONLY(int hypId,
86 : SMESH_2D_Algo(hypId, gen)
88 _name = "NETGEN_2D_ONLY";
90 _shapeType = (1 << TopAbs_FACE);// 1 bit /shape type
91 _onlyUnaryInput = false; // treat all FACEs at once
93 _compatibleHypothesis.push_back("MaxElementArea");
94 _compatibleHypothesis.push_back("LengthFromEdges");
95 _compatibleHypothesis.push_back("QuadranglePreference");
96 _compatibleHypothesis.push_back("NETGEN_Parameters_2D");
97 _compatibleHypothesis.push_back("ViscousLayers2D");
99 _hypMaxElementArea = 0;
100 _hypLengthFromEdges = 0;
101 _hypQuadranglePreference = 0;
105 //=============================================================================
109 //=============================================================================
111 NETGENPlugin_NETGEN_2D_ONLY::~NETGENPlugin_NETGEN_2D_ONLY()
113 //MESSAGE("NETGENPlugin_NETGEN_2D_ONLY::~NETGENPlugin_NETGEN_2D_ONLY");
116 //=============================================================================
120 //=============================================================================
122 bool NETGENPlugin_NETGEN_2D_ONLY::CheckHypothesis (SMESH_Mesh& aMesh,
123 const TopoDS_Shape& aShape,
124 Hypothesis_Status& aStatus)
126 _hypMaxElementArea = 0;
127 _hypLengthFromEdges = 0;
128 _hypQuadranglePreference = 0;
133 const list<const SMESHDS_Hypothesis*>& hyps = GetUsedHypothesis(aMesh, aShape, false);
137 aStatus = HYP_OK; //SMESH_Hypothesis::HYP_MISSING;
138 return true; // (PAL13464) can work with no hypothesis, LengthFromEdges is default one
141 aStatus = HYP_MISSING;
144 list<const SMESHDS_Hypothesis*>::const_iterator ith;
145 for (ith = hyps.begin(); ith != hyps.end(); ++ith )
147 const SMESHDS_Hypothesis* hyp = (*ith);
149 string hypName = hyp->GetName();
151 if ( hypName == "MaxElementArea")
152 _hypMaxElementArea = static_cast<const StdMeshers_MaxElementArea*> (hyp);
153 else if ( hypName == "LengthFromEdges" )
154 _hypLengthFromEdges = static_cast<const StdMeshers_LengthFromEdges*> (hyp);
155 else if ( hypName == "QuadranglePreference" )
156 _hypQuadranglePreference = static_cast<const StdMeshers_QuadranglePreference*>(hyp);
157 else if ( hypName == "NETGEN_Parameters_2D" )
158 _hypParameters = static_cast<const NETGENPlugin_Hypothesis_2D*>(hyp);
159 else if ( hypName == StdMeshers_ViscousLayers2D::GetHypType() )
162 aStatus = HYP_INCOMPATIBLE;
167 int nbHyps = bool(_hypMaxElementArea) + bool(_hypLengthFromEdges) + bool(_hypParameters );
169 aStatus = HYP_CONCURRENT;
171 error( StdMeshers_ViscousLayers2D::CheckHypothesis( aMesh, aShape, aStatus ));
175 if ( aStatus == HYP_OK && _hypParameters && _hypQuadranglePreference )
177 aStatus = HYP_INCOMPAT_HYPS;
178 return error(SMESH_Comment("\"") << _hypQuadranglePreference->GetName()
179 << "\" and \"" << _hypParameters->GetName()
180 << "\" are incompatible hypotheses");
183 return ( aStatus == HYP_OK );
188 // void limitSize( netgen::Mesh* ngMesh,
189 // const double maxh )
192 // netgen::Point3d pmin, pmax;
193 // ngMesh->GetBox( pmin, pmax, 0 );
194 // const double dx = pmax.X() - pmin.X();
195 // const double dy = pmax.Y() - pmin.Y();
196 // const double dz = pmax.Z() - pmin.Z();
198 // const int nbX = Max( 2, int( dx / maxh * 3 ));
199 // const int nbY = Max( 2, int( dy / maxh * 3 ));
200 // const int nbZ = Max( 2, int( dz / maxh * 3 ));
202 // if ( ! & ngMesh->LocalHFunction() )
203 // ngMesh->SetLocalH( pmin, pmax, 0.1 );
205 // netgen::Point3d p;
206 // for ( int i = 0; i <= nbX; ++i )
208 // p.X() = pmin.X() + i * dx / nbX;
209 // for ( int j = 0; j <= nbY; ++j )
211 // p.Y() = pmin.Y() + j * dy / nbY;
212 // for ( int k = 0; k <= nbZ; ++k )
214 // p.Z() = pmin.Z() + k * dz / nbZ;
215 // ngMesh->RestrictLocalH( p, maxh );
222 //=============================================================================
224 *Here we are going to use the NETGEN mesher
226 //=============================================================================
228 bool NETGENPlugin_NETGEN_2D_ONLY::Compute(SMESH_Mesh& aMesh,
229 const TopoDS_Shape& aShape)
232 SMESH_Hypothesis::Hypothesis_Status hypStatus;
233 this->CheckHypothesis(aMesh, aShape, hypStatus);
236 netgen::multithread.terminate = 0;
237 //netgen::multithread.task = "Surface meshing";
239 SMESHDS_Mesh* meshDS = aMesh.GetMeshDS();
240 SMESH_MesherHelper helper(aMesh);
241 helper.SetElementsOnShape( true );
243 NETGENPlugin_NetgenLibWrapper *ngLib;
244 int id_ngLib = nglib_provider.take(&ngLib);
245 ngLib->_isComputeOk = false;
247 netgen::Mesh ngMeshNoLocSize;
248 netgen::Mesh * ngMeshes[2] = { (netgen::Mesh*) ngLib->_ngMesh, & ngMeshNoLocSize };
249 netgen::OCCGeometry *occgeoComm;
250 int id_occgeoComm = occgeom_provider.take(&occgeoComm);
252 // min / max sizes are set as follows:
253 // if ( _hypParameters )
254 // min and max are defined by the user
255 // else if ( _hypLengthFromEdges )
256 // min = aMesher.GetDefaultMinSize()
257 // max = average segment len of a FACE
258 // else if ( _hypMaxElementArea )
259 // min = aMesher.GetDefaultMinSize()
260 // max = f( _hypMaxElementArea )
262 // min = aMesher.GetDefaultMinSize()
263 // max = max segment len of a FACE
264 NETGENPlugin_Mesher aMesher( &aMesh, aShape, /*isVolume=*/false);
265 aMesher.SetParameters( _hypParameters ); // _hypParameters -> netgen::mparam
266 const bool toOptimize = _hypParameters ? _hypParameters->GetOptimize() : true;
267 if ( _hypMaxElementArea )
269 netgen::mparam.maxh = sqrt( 2. * _hypMaxElementArea->GetMaxArea() / sqrt(3.0) );
271 if ( _hypQuadranglePreference )
272 netgen::mparam.quad = true;
274 // local size is common for all FACEs in aShape?
275 const bool isCommonLocalSize = ( !_hypLengthFromEdges && !_hypMaxElementArea && netgen::mparam.uselocalh );
276 const bool isDefaultHyp = ( !_hypLengthFromEdges && !_hypMaxElementArea && !_hypParameters );
278 if ( isCommonLocalSize ) // compute common local size in ngMeshes[0]
280 //list< SMESH_subMesh* > meshedSM[4]; --> all sub-shapes are added to occgeoComm
281 aMesher.PrepareOCCgeometry( *occgeoComm, aShape, aMesh );//, meshedSM );
283 // local size set at MESHCONST_ANALYSE step depends on
284 // minh, face_maxh, grading and curvaturesafety; find minh if not set by the user
285 if ( !_hypParameters || netgen::mparam.minh < DBL_MIN )
287 if ( !_hypParameters )
288 netgen::mparam.maxh = occgeoComm->GetBoundingBox().Diam() / 3.;
289 netgen::mparam.minh = aMesher.GetDefaultMinSize( aShape, netgen::mparam.maxh );
291 // set local size depending on curvature and NOT closeness of EDGEs
293 const double factor = 2; //netgen::occparam.resthcloseedgefac;
295 const double factor = netgen::occparam.resthcloseedgefac;
296 netgen::occparam.resthcloseedgeenable = false;
297 netgen::occparam.resthcloseedgefac = 1.0 + netgen::mparam.grading;
299 occgeoComm->face_maxh = netgen::mparam.maxh;
301 netgen::OCCParameters occparam;
302 netgen::OCCSetLocalMeshSize( *occgeoComm, *ngMeshes[0], netgen::mparam, occparam );
304 netgen::OCCSetLocalMeshSize( *occgeoComm, *ngMeshes[0] );
306 occgeoComm->emap.Clear();
307 occgeoComm->vmap.Clear();
309 // set local size according to size of existing segments
310 TopTools_IndexedMapOfShape edgeMap;
311 TopExp::MapShapes( aMesh.GetShapeToMesh(), TopAbs_EDGE, edgeMap );
312 for ( int iE = 1; iE <= edgeMap.Extent(); ++iE )
314 const TopoDS_Shape& edge = edgeMap( iE );
315 if ( SMESH_Algo::isDegenerated( TopoDS::Edge( edge )))
317 SMESHDS_SubMesh* smDS = meshDS->MeshElements( edge );
318 if ( !smDS ) continue;
319 SMDS_ElemIteratorPtr segIt = smDS->GetElements();
320 while ( segIt->more() )
322 const SMDS_MeshElement* seg = segIt->next();
323 SMESH_TNodeXYZ n1 = seg->GetNode(0);
324 SMESH_TNodeXYZ n2 = seg->GetNode(1);
325 gp_XYZ p = 0.5 * ( n1 + n2 );
326 netgen::Point3d pi(p.X(), p.Y(), p.Z());
327 ngMeshes[0]->RestrictLocalH( pi, factor * ( n1 - n2 ).Modulus() );
331 // set local size defined on shapes
332 aMesher.SetLocalSize( *occgeoComm, *ngMeshes[0] );
333 aMesher.SetLocalSizeForChordalError( *occgeoComm, *ngMeshes[0] );
335 ngMeshes[0]->LoadLocalMeshSize( mparam.meshsizefilename );
336 } catch (NgException & ex) {
337 return error( COMPERR_BAD_PARMETERS, ex.What() );
340 netgen::mparam.uselocalh = toOptimize; // restore as it is used at surface optimization
341 // ==================
343 // ==================
345 vector< const SMDS_MeshNode* > nodeVec;
347 TopExp_Explorer fExp( aShape, TopAbs_FACE );
348 for ( int iF = 0; fExp.More(); fExp.Next(), ++iF )
350 TopoDS_Face F = TopoDS::Face( fExp.Current() /*.Oriented( TopAbs_FORWARD )*/);
351 int faceID = meshDS->ShapeToIndex( F );
352 SMESH_ComputeErrorPtr& faceErr = aMesh.GetSubMesh( F )->GetComputeError();
354 _quadraticMesh = helper.IsQuadraticSubMesh( F );
355 const bool ignoreMediumNodes = _quadraticMesh;
357 // build viscous layers if required
358 if ( F.Orientation() != TopAbs_FORWARD &&
359 F.Orientation() != TopAbs_REVERSED )
360 F.Orientation( TopAbs_FORWARD ); // avoid pb with TopAbs_INTERNAL
361 SMESH_ProxyMesh::Ptr proxyMesh = StdMeshers_ViscousLayers2D::Compute( aMesh, F );
365 // ------------------------
366 // get all EDGEs of a FACE
367 // ------------------------
369 StdMeshers_FaceSide::GetFaceWires( F, aMesh, ignoreMediumNodes, faceErr, &helper, proxyMesh );
370 if ( faceErr && !faceErr->IsOK() )
372 size_t nbWires = wires.size();
376 ( new SMESH_ComputeError
377 ( COMPERR_ALGO_FAILED, "Problem in StdMeshers_FaceSide::GetFaceWires()" ));
380 if ( wires[0]->NbSegments() < 3 ) // ex: a circle with 2 segments
383 ( new SMESH_ComputeError
384 ( COMPERR_BAD_INPUT_MESH, SMESH_Comment("Too few segments: ")<<wires[0]->NbSegments()) );
388 // ----------------------
389 // compute maxh of a FACE
390 // ----------------------
392 if ( !_hypParameters )
394 double edgeLength = 0;
395 if (_hypLengthFromEdges )
397 // compute edgeLength as an average segment length
398 smIdType nbSegments = 0;
399 for ( size_t iW = 0; iW < nbWires; ++iW )
401 edgeLength += wires[ iW ]->Length();
402 nbSegments += wires[ iW ]->NbSegments();
405 edgeLength /= double( nbSegments );
406 netgen::mparam.maxh = edgeLength;
408 else if ( isDefaultHyp )
410 // set edgeLength by a longest segment
412 for ( size_t iW = 0; iW < nbWires; ++iW )
414 const UVPtStructVec& points = wires[ iW ]->GetUVPtStruct();
415 if ( points.empty() )
416 return error( COMPERR_BAD_INPUT_MESH );
417 gp_Pnt pPrev = SMESH_TNodeXYZ( points[0].node );
418 for ( size_t i = 1; i < points.size(); ++i )
420 gp_Pnt p = SMESH_TNodeXYZ( points[i].node );
421 maxSeg2 = Max( maxSeg2, p.SquareDistance( pPrev ));
425 edgeLength = sqrt( maxSeg2 ) * 1.05;
426 netgen::mparam.maxh = edgeLength;
428 if ( netgen::mparam.maxh < DBL_MIN )
429 netgen::mparam.maxh = occgeoComm->GetBoundingBox().Diam();
431 if ( !isCommonLocalSize )
433 netgen::mparam.minh = aMesher.GetDefaultMinSize( F, netgen::mparam.maxh );
438 netgen::OCCGeometry *occgeom;
439 int id_occgeom = occgeom_provider.take(&occgeom);
441 occgeom->fmap.Add( F );
442 occgeom->CalcBoundingBox();
443 occgeom->facemeshstatus.SetSize(1);
444 occgeom->facemeshstatus = 0;
445 occgeom->face_maxh_modified.SetSize(1);
446 occgeom->face_maxh_modified = 0;
447 occgeom->face_maxh.SetSize(1);
448 occgeom->face_maxh = netgen::mparam.maxh;
450 // -------------------------
452 // -------------------------
454 // MESHCONST_ANALYSE step may lead to a failure, so we make an attempt
455 // w/o MESHCONST_ANALYSE at the second loop
457 enum { LOC_SIZE, NO_LOC_SIZE };
458 int iLoop = isCommonLocalSize ? 0 : 1;
459 for ( ; iLoop < 2; iLoop++ )
461 //bool isMESHCONST_ANALYSE = false;
464 netgen::Mesh * ngMesh = ngMeshes[ iLoop ];
465 ngMesh->DeleteMesh();
467 if ( iLoop == NO_LOC_SIZE )
469 ngMesh->SetGlobalH ( mparam.maxh );
470 ngMesh->SetMinimalH( mparam.minh );
471 Box<3> bb = occgeom->GetBoundingBox();
472 bb.Increase (bb.Diam()/10);
473 ngMesh->SetLocalH (bb.PMin(), bb.PMax(), mparam.grading);
474 aMesher.SetLocalSize( *occgeom, *ngMesh );
475 aMesher.SetLocalSizeForChordalError( *occgeoComm, *ngMesh );
477 ngMesh->LoadLocalMeshSize( mparam.meshsizefilename );
478 } catch (NgException & ex) {
479 return error( COMPERR_BAD_PARMETERS, ex.What() );
484 faceErr = aMesher.AddSegmentsToMesh( *ngMesh, *occgeom, wires, helper, nodeVec,
485 /*overrideMinH=*/!_hypParameters);
486 if ( faceErr && !faceErr->IsOK() )
489 //if ( !isCommonLocalSize )
490 //limitSize( ngMesh, mparam.maxh * 0.8);
492 // -------------------------
493 // Generate surface mesh
494 // -------------------------
496 const int startWith = MESHCONST_MESHSURFACE;
497 const int endWith = toOptimize ? MESHCONST_OPTSURFACE : MESHCONST_MESHSURFACE;
502 err = ngLib->GenerateMesh(*occgeom, startWith, endWith, ngMesh);
503 if ( netgen::multithread.terminate )
506 str << "Error in netgen::OCCGenerateMesh() at " << netgen::multithread.task;
508 catch (Standard_Failure& ex)
511 str << "Exception in netgen::OCCGenerateMesh()"
512 << " at " << netgen::multithread.task
513 << ": " << ex.DynamicType()->Name();
514 if ( ex.GetMessageString() && strlen( ex.GetMessageString() ))
515 str << ": " << ex.GetMessageString();
519 str << "Exception in netgen::OCCGenerateMesh()"
520 << " at " << netgen::multithread.task;
524 if ( aMesher.FixFaceMesh( *occgeom, *ngMesh, 1 ))
526 if ( iLoop == LOC_SIZE )
528 netgen::mparam.minh = netgen::mparam.maxh;
529 netgen::mparam.maxh = 0;
530 for ( size_t iW = 0; iW < wires.size(); ++iW )
532 StdMeshers_FaceSidePtr wire = wires[ iW ];
533 const vector<UVPtStruct>& uvPtVec = wire->GetUVPtStruct();
534 for ( size_t iP = 1; iP < uvPtVec.size(); ++iP )
536 SMESH_TNodeXYZ p( uvPtVec[ iP ].node );
537 netgen::Point3d np( p.X(),p.Y(),p.Z());
538 double segLen = p.Distance( uvPtVec[ iP-1 ].node );
539 double size = ngMesh->GetH( np );
540 netgen::mparam.minh = Min( netgen::mparam.minh, size );
541 netgen::mparam.maxh = Max( netgen::mparam.maxh, segLen );
544 //cerr << "min " << netgen::mparam.minh << " max " << netgen::mparam.maxh << endl;
545 netgen::mparam.minh *= 0.9;
546 netgen::mparam.maxh *= 1.1;
551 faceErr.reset( new SMESH_ComputeError( COMPERR_ALGO_FAILED, str ));
555 occgeom_provider.release(id_occgeoComm, true);
556 occgeom_provider.release(id_occgeom, true);
558 // ----------------------------------------------------
559 // Fill the SMESHDS with the generated nodes and faces
560 // ----------------------------------------------------
562 int nbNodes = ngMesh->GetNP();
563 int nbFaces = ngMesh->GetNSE();
565 int nbInputNodes = (int) nodeVec.size()-1;
566 nodeVec.resize( nbNodes+1, 0 );
569 for ( int ngID = nbInputNodes + 1; ngID <= nbNodes; ++ngID )
571 const MeshPoint& ngPoint = ngMesh->Point( ngID );
572 SMDS_MeshNode * node = meshDS->AddNode(ngPoint(0), ngPoint(1), ngPoint(2));
573 nodeVec[ ngID ] = node;
578 vector<const SMDS_MeshNode*> nodes;
579 for ( i = 1; i <= nbFaces ; ++i )
581 const Element2d& elem = ngMesh->SurfaceElement(i);
582 nodes.resize( elem.GetNP() );
583 for (j=1; j <= elem.GetNP(); ++j)
585 int pind = elem.PNum(j);
588 nodes[ j-1 ] = nodeVec[ pind ];
589 if ( nodes[ j-1 ]->GetPosition()->GetTypeOfPosition() == SMDS_TOP_3DSPACE )
591 const PointGeomInfo& pgi = elem.GeomInfoPi(j);
592 meshDS->SetNodeOnFace( nodes[ j-1 ], faceID, pgi.u, pgi.v);
595 if ( j > elem.GetNP() )
597 if ( elem.GetType() == TRIG )
598 helper.AddFace(nodes[0],nodes[1],nodes[2]);
600 helper.AddFace(nodes[0],nodes[1],nodes[2],nodes[3]);
608 nglib_provider.release(id_ngLib, true);
614 void NETGENPlugin_NETGEN_2D_ONLY::CancelCompute()
616 SMESH_Algo::CancelCompute();
617 netgen::multithread.terminate = 1;
620 //================================================================================
622 * \brief Return progress of Compute() [0.,1]
624 //================================================================================
626 double NETGENPlugin_NETGEN_2D_ONLY::GetProgress() const
629 // const char* task1 = "Surface meshing";
630 // //const char* task2 = "Optimizing surface";
631 // double& progress = const_cast<NETGENPlugin_NETGEN_2D_ONLY*>( this )->_progress;
632 // if ( _progressByTic < 0. &&
633 // strncmp( netgen::multithread.task, task1, 3 ) == 0 )
635 // progress = Min( 0.25, SMESH_Algo::GetProgressByTic() ); // [0, 0.25]
637 // else //if ( strncmp( netgen::multithread.task, task2, 3 ) == 0)
639 // if ( _progressByTic < 0 )
641 // NETGENPlugin_NETGEN_2D_ONLY* me = (NETGENPlugin_NETGEN_2D_ONLY*) this;
642 // me->_progressByTic = 0.25 / (_progressTic+1);
644 // const_cast<NETGENPlugin_NETGEN_2D_ONLY*>( this )->_progressTic++;
645 // progress = Max( progress, _progressByTic * _progressTic );
647 // //cout << netgen::multithread.task << " " << _progressTic << endl;
648 // return Min( progress, 0.99 );
651 //=============================================================================
655 //=============================================================================
657 bool NETGENPlugin_NETGEN_2D_ONLY::Evaluate(SMESH_Mesh& aMesh,
658 const TopoDS_Shape& aShape,
659 MapShapeNbElems& aResMap)
661 TopoDS_Face F = TopoDS::Face(aShape);
665 // collect info from edges
666 smIdType nb0d = 0, nb1d = 0;
667 bool IsQuadratic = false;
669 double fullLen = 0.0;
670 TopTools_MapOfShape tmpMap;
671 for (TopExp_Explorer exp(F, TopAbs_EDGE); exp.More(); exp.Next()) {
672 TopoDS_Edge E = TopoDS::Edge(exp.Current());
673 if( tmpMap.Contains(E) )
676 SMESH_subMesh *aSubMesh = aMesh.GetSubMesh(exp.Current());
677 MapShapeNbElemsItr anIt = aResMap.find(aSubMesh);
678 if( anIt==aResMap.end() ) {
679 SMESH_subMesh *sm = aMesh.GetSubMesh(F);
680 SMESH_ComputeErrorPtr& smError = sm->GetComputeError();
681 smError.reset( new SMESH_ComputeError(COMPERR_ALGO_FAILED,"Submesh can not be evaluated",this));
684 std::vector<smIdType> aVec = (*anIt).second;
685 nb0d += aVec[SMDSEntity_Node];
686 nb1d += std::max(aVec[SMDSEntity_Edge],aVec[SMDSEntity_Quad_Edge]);
687 double aLen = SMESH_Algo::EdgeLength(E);
690 IsQuadratic = (aVec[SMDSEntity_Quad_Edge] > aVec[SMDSEntity_Edge]);
696 // compute edge length
698 if (( _hypLengthFromEdges ) || ( !_hypLengthFromEdges && !_hypMaxElementArea )) {
700 ELen = fullLen / double( nb1d );
702 if ( _hypMaxElementArea ) {
703 double maxArea = _hypMaxElementArea->GetMaxArea();
704 ELen = sqrt(2. * maxArea/sqrt(3.0));
707 BRepGProp::SurfaceProperties(F,G);
708 double anArea = G.Mass();
710 const int hugeNb = numeric_limits<int>::max()/10;
711 if ( anArea / hugeNb > ELen*ELen )
713 SMESH_subMesh *sm = aMesh.GetSubMesh(F);
714 SMESH_ComputeErrorPtr& smError = sm->GetComputeError();
715 smError.reset( new SMESH_ComputeError(COMPERR_ALGO_FAILED,"Submesh can not be evaluated.\nToo small element length",this));
718 smIdType nbFaces = (smIdType) ( anArea / ( ELen*ELen*sqrt(3.) / 4 ) );
719 smIdType nbNodes = (smIdType) ( ( nbFaces*3 - (nb1d-1)*2 ) / 6 + 1 );
720 std::vector<smIdType> aVec(SMDSEntity_Last);
721 for(smIdType i=SMDSEntity_Node; i<SMDSEntity_Last; i++) aVec[i]=0;
723 aVec[SMDSEntity_Node] = nbNodes;
724 aVec[SMDSEntity_Quad_Triangle] = nbFaces;
727 aVec[SMDSEntity_Node] = nbNodes;
728 aVec[SMDSEntity_Triangle] = nbFaces;
730 SMESH_subMesh *sm = aMesh.GetSubMesh(F);
731 aResMap.insert(std::make_pair(sm,aVec));