1 // Copyright (C) 2007-2008 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.
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
22 // SMESH SMESH : implementaion of SMESH idl descriptions
23 // File : StdMeshers_MEFISTO_2D.cxx
24 // Moved here from SMESH_MEFISTO_2D.cxx
25 // Author : Paul RASCLE, EDF
28 #include "StdMeshers_MEFISTO_2D.hxx"
30 #include "SMESH_Gen.hxx"
31 #include "SMESH_Mesh.hxx"
32 #include "SMESH_subMesh.hxx"
33 #include "SMESH_Block.hxx"
34 #include "SMESH_MesherHelper.hxx"
35 #include "SMESH_Comment.hxx"
37 #include "StdMeshers_FaceSide.hxx"
38 #include "StdMeshers_MaxElementArea.hxx"
39 #include "StdMeshers_LengthFromEdges.hxx"
44 #include "SMDS_MeshElement.hxx"
45 #include "SMDS_MeshNode.hxx"
46 #include "SMDS_EdgePosition.hxx"
47 #include "SMDS_FacePosition.hxx"
49 #include "utilities.h"
51 #include <BRepTools.hxx>
52 #include <BRep_Tool.hxx>
53 #include <Geom_Curve.hxx>
54 #include <Geom2d_Curve.hxx>
55 #include <Geom_Surface.hxx>
56 #include <Precision.hxx>
58 #include <TopExp_Explorer.hxx>
59 #include <TopTools_ListIteratorOfListOfShape.hxx>
60 #include <TopTools_ListOfShape.hxx>
61 #include <TopTools_MapOfShape.hxx>
63 #include <TopoDS_Edge.hxx>
64 #include <TopoDS_Face.hxx>
65 #include <TopoDS_Iterator.hxx>
66 #include <gp_Pnt2d.hxx>
68 #include <BRep_Tool.hxx>
69 #include <GProp_GProps.hxx>
70 #include <BRepGProp.hxx>
74 //=============================================================================
78 //=============================================================================
80 StdMeshers_MEFISTO_2D::StdMeshers_MEFISTO_2D(int hypId, int studyId, SMESH_Gen * gen):
81 SMESH_2D_Algo(hypId, studyId, gen)
83 MESSAGE("StdMeshers_MEFISTO_2D::StdMeshers_MEFISTO_2D");
85 _shapeType = (1 << TopAbs_FACE);
86 _compatibleHypothesis.push_back("MaxElementArea");
87 _compatibleHypothesis.push_back("LengthFromEdges");
91 _hypMaxElementArea = NULL;
92 _hypLengthFromEdges = NULL;
96 //=============================================================================
100 //=============================================================================
102 StdMeshers_MEFISTO_2D::~StdMeshers_MEFISTO_2D()
104 MESSAGE("StdMeshers_MEFISTO_2D::~StdMeshers_MEFISTO_2D");
107 //=============================================================================
111 //=============================================================================
113 bool StdMeshers_MEFISTO_2D::CheckHypothesis
115 const TopoDS_Shape& aShape,
116 SMESH_Hypothesis::Hypothesis_Status& aStatus)
118 _hypMaxElementArea = NULL;
119 _hypLengthFromEdges = NULL;
123 list <const SMESHDS_Hypothesis * >::const_iterator itl;
124 const SMESHDS_Hypothesis *theHyp;
126 const list <const SMESHDS_Hypothesis * >&hyps = GetUsedHypothesis(aMesh, aShape);
127 int nbHyp = hyps.size();
130 aStatus = SMESH_Hypothesis::HYP_OK; //SMESH_Hypothesis::HYP_MISSING;
131 return true; // (PAL13464) can work with no hypothesis, LengthFromEdges is default one
135 theHyp = (*itl); // use only the first hypothesis
137 string hypName = theHyp->GetName();
141 if (hypName == "MaxElementArea")
143 _hypMaxElementArea = static_cast<const StdMeshers_MaxElementArea *>(theHyp);
144 ASSERT(_hypMaxElementArea);
145 _maxElementArea = _hypMaxElementArea->GetMaxArea();
147 aStatus = SMESH_Hypothesis::HYP_OK;
150 else if (hypName == "LengthFromEdges")
152 _hypLengthFromEdges = static_cast<const StdMeshers_LengthFromEdges *>(theHyp);
153 ASSERT(_hypLengthFromEdges);
155 aStatus = SMESH_Hypothesis::HYP_OK;
158 aStatus = SMESH_Hypothesis::HYP_INCOMPATIBLE;
163 if (_maxElementArea > 0)
165 //_edgeLength = 2 * sqrt(_maxElementArea); // triangles : minorant
166 _edgeLength = sqrt(2. * _maxElementArea/sqrt(3.0));
170 isOk = (_hypLengthFromEdges != NULL); // **** check mode
172 aStatus = SMESH_Hypothesis::HYP_BAD_PARAMETER;
178 //=============================================================================
182 //=============================================================================
184 bool StdMeshers_MEFISTO_2D::Compute(SMESH_Mesh & aMesh, const TopoDS_Shape & aShape)
186 MESSAGE("StdMeshers_MEFISTO_2D::Compute");
188 TopoDS_Face F = TopoDS::Face(aShape.Oriented(TopAbs_FORWARD));
190 // helper builds quadratic mesh if necessary
191 SMESH_MesherHelper helper(aMesh);
193 _quadraticMesh = myTool->IsQuadraticSubMesh(aShape);
194 const bool ignoreMediumNodes = _quadraticMesh;
196 // get all edges of a face
198 TWireVector wires = StdMeshers_FaceSide::GetFaceWires( F, aMesh, ignoreMediumNodes, problem );
199 int nbWires = wires.size();
200 if ( problem && !problem->IsOK() ) return error( problem );
201 if ( nbWires == 0 ) return error( "Problem in StdMeshers_FaceSide::GetFaceWires()");
202 if ( wires[0]->NbSegments() < 3 ) // ex: a circle with 2 segments
203 return error(COMPERR_BAD_INPUT_MESH,
204 SMESH_Comment("Too few segments: ")<<wires[0]->NbSegments());
206 // compute average edge length
207 if (!_hypMaxElementArea)
211 for ( int iW = 0; iW < nbWires; ++iW )
213 StdMeshers_FaceSidePtr wire = wires[ iW ];
214 _edgeLength += wire->Length();
215 nbSegments += wire->NbSegments();
218 _edgeLength /= nbSegments;
221 if (/*_hypLengthFromEdges &&*/ _edgeLength < DBL_MIN )
224 Z nblf; //nombre de lignes fermees (enveloppe en tete)
225 Z *nudslf = NULL; //numero du dernier sommet de chaque ligne fermee
227 Z nbpti = 0; //nombre points internes futurs sommets de la triangulation
236 Z nutysu = 1; // 1: il existe un fonction areteideale_()
237 // Z nutysu=0; // 0: on utilise aretmx
238 R aretmx = _edgeLength; // longueur max aretes future triangulation
242 nudslf = new Z[1 + nblf];
247 // count nb of input points
248 for ( int iW = 0; iW < nbWires; ++iW )
250 nbpnt += wires[iW]->NbPoints() - 1;
251 nudslf[iw++] = nbpnt;
254 uvslf = new R2[nudslf[nblf]];
256 double scalex, scaley;
257 ComputeScaleOnFace(aMesh, F, scalex, scaley);
259 // correspondence mefisto index --> Nodes
260 vector< const SMDS_MeshNode*> mefistoToDS(nbpnt, (const SMDS_MeshNode*)0);
264 // fill input points UV
265 if ( LoadPoints(wires, uvslf, mefistoToDS, scalex, scaley) )
268 aptrte(nutysu, aretmx,
269 nblf, nudslf, uvslf, nbpti, uvpti, nbst, uvst, nbt, nust, ierr);
273 MESSAGE("... End Triangulation Generated Triangle Number " << nbt);
274 MESSAGE(" Node Number " << nbst);
275 StoreResult(nbst, uvst, nbt, nust, mefistoToDS, scalex, scaley);
280 error(ierr,"Error in Triangulation (aptrte())");
283 if (nudslf != NULL) delete[]nudslf;
284 if (uvslf != NULL) delete[]uvslf;
285 if (uvst != NULL) delete[]uvst;
286 if (nust != NULL) delete[]nust;
292 //=============================================================================
296 //=============================================================================
298 bool StdMeshers_MEFISTO_2D::Evaluate(SMESH_Mesh & aMesh,
299 const TopoDS_Shape & aShape,
300 MapShapeNbElems& aResMap)
302 MESSAGE("StdMeshers_MEFISTO_2D::Evaluate");
304 TopoDS_Face F = TopoDS::Face(aShape.Oriented(TopAbs_FORWARD));
308 bool IsQuadratic = false;
310 TopExp_Explorer exp(F,TopAbs_EDGE);
311 for(; exp.More(); exp.Next()) {
312 TopoDS_Edge E = TopoDS::Edge(exp.Current());
313 MapShapeNbElemsItr anIt = aResMap.find( aMesh.GetSubMesh(E) );
314 if( anIt == aResMap.end() ) continue;
315 std::vector<int> aVec = (*anIt).second;
316 int nbe = Max(aVec[SMDSEntity_Edge],aVec[SMDSEntity_Quad_Edge]);
319 IsQuadratic = ( aVec[SMDSEntity_Quad_Edge] > aVec[SMDSEntity_Edge] );
324 Handle(Geom_Curve) C = BRep_Tool::Curve(E,L,a,b);
327 double dp = (b-a)/nbe;
328 for(int i=1; i<=nbe; i++) {
331 aLen += P1.Distance(P2);
336 std::vector<int> aResVec(SMDSEntity_Last);
337 for(int i=SMDSEntity_Node; i<SMDSEntity_Last; i++) aResVec[i] = 0;
338 SMESH_subMesh * sm = aMesh.GetSubMesh(aShape);
339 aResMap.insert(std::make_pair(sm,aResVec));
340 SMESH_ComputeErrorPtr& smError = sm->GetComputeError();
341 smError.reset( new SMESH_ComputeError(COMPERR_ALGO_FAILED,
342 "Submesh can not be evaluated",this));
345 aLen = aLen/NbSeg; // middle length
347 _edgeLength = Precision::Infinite();
348 double tmpLength = Min( _edgeLength, aLen );
351 BRepGProp::SurfaceProperties(aShape,G);
352 double anArea = G.Mass();
354 int nbFaces = Precision::IsInfinite( tmpLength ) ? 0 :
355 (int)( anArea/(tmpLength*tmpLength*sqrt(3.)/4) );
356 int nbNodes = (int) ( nbFaces*3 - (NbSeg-1)*2 ) / 6;
358 std::vector<int> aVec(SMDSEntity_Last);
359 for(int i=SMDSEntity_Node; i<SMDSEntity_Last; i++) aVec[i] = 0;
361 aVec[SMDSEntity_Quad_Triangle] = nbFaces;
362 aVec[SMDSEntity_Node] = (int)( nbNodes + nbFaces*3 - (NbSeg-1) );
365 aVec[SMDSEntity_Node] = nbNodes;
366 aVec[SMDSEntity_Triangle] = nbFaces;
368 SMESH_subMesh * sm = aMesh.GetSubMesh(aShape);
369 aResMap.insert(std::make_pair(sm,aVec));
375 //=======================================================================
376 //function : fixOverlappedLinkUV
377 //purpose : prevent failure due to overlapped adjacent links
378 //=======================================================================
380 static bool fixOverlappedLinkUV( R2& uv0, const R2& uv1, const R2& uv2 )
382 gp_XY v1( uv0.x - uv1.x, uv0.y - uv1.y );
383 gp_XY v2( uv2.x - uv1.x, uv2.y - uv1.y );
385 double tol2 = DBL_MIN * DBL_MIN;
386 double sqMod1 = v1.SquareModulus();
387 if ( sqMod1 <= tol2 ) return false;
388 double sqMod2 = v2.SquareModulus();
389 if ( sqMod2 <= tol2 ) return false;
393 // check sinus >= 1.e-3
394 const double minSin = 1.e-3;
395 if ( dot > 0 && 1 - dot * dot / ( sqMod1 * sqMod2 ) < minSin * minSin ) {
396 MESSAGE(" ___ FIX UV ____" << uv0.x << " " << uv0.y);
397 v1.SetCoord( -v1.Y(), v1.X() );
398 double delta = sqrt( sqMod1 ) * minSin;
408 // MESSAGE(" -> " << uv0.x << " " << uv0.y << " ");
409 // MESSAGE("v1( " << v1.X() << " " << v1.Y() << " ) " <<
410 // "v2( " << v2.X() << " " << v2.Y() << " ) ");
411 // MESSAGE("SIN: " << sqrt(1 - dot * dot / (sqMod1 * sqMod2)));
412 // v1.SetCoord( uv0.x - uv1.x, uv0.y - uv1.y );
413 // v2.SetCoord( uv2.x - uv1.x, uv2.y - uv1.y );
414 // gp_XY v3( uv2.x - uv0.x, uv2.y - uv0.y );
415 // sqMod1 = v1.SquareModulus();
416 // sqMod2 = v2.SquareModulus();
418 // double sin = sqrt(1 - dot * dot / (sqMod1 * sqMod2));
419 // MESSAGE("NEW SIN: " << sin);
426 //=======================================================================
427 //function : fixCommonVertexUV
429 //=======================================================================
431 static bool fixCommonVertexUV (R2 & theUV,
432 const TopoDS_Vertex& theV,
433 const TopoDS_Face& theF,
434 const TopTools_IndexedDataMapOfShapeListOfShape & theVWMap,
435 SMESH_Mesh & theMesh,
436 const double theScaleX,
437 const double theScaleY,
438 const bool theCreateQuadratic)
440 if( !theVWMap.Contains( theV )) return false;
442 // check if there is another wire sharing theV
443 const TopTools_ListOfShape& WList = theVWMap.FindFromKey( theV );
444 TopTools_ListIteratorOfListOfShape aWIt;
445 TopTools_MapOfShape aWires;
446 for ( aWIt.Initialize( WList ); aWIt.More(); aWIt.Next() )
447 aWires.Add( aWIt.Value() );
448 if ( aWires.Extent() < 2 ) return false;
450 TopoDS_Shape anOuterWire = BRepTools::OuterWire(theF);
451 TopoDS_Shape anInnerWire;
452 for ( aWIt.Initialize( WList ); aWIt.More() && anInnerWire.IsNull(); aWIt.Next() )
453 if ( !anOuterWire.IsSame( aWIt.Value() ))
454 anInnerWire = aWIt.Value();
456 TopTools_ListOfShape EList;
457 list< double > UList;
459 // find edges of theW sharing theV
460 // and find 2d normal to them at theV
462 TopoDS_Iterator itE( anInnerWire );
463 for ( ; itE.More(); itE.Next() )
465 const TopoDS_Edge& E = TopoDS::Edge( itE.Value() );
466 TopoDS_Iterator itV( E );
467 for ( ; itV.More(); itV.Next() )
469 const TopoDS_Vertex & V = TopoDS::Vertex( itV.Value() );
470 if ( !V.IsSame( theV ))
473 Standard_Real u = BRep_Tool::Parameter( V, E );
474 UList.push_back( u );
476 Handle(Geom2d_Curve) C2d = BRep_Tool::CurveOnSurface(E, theF, f, l);
480 gp_Vec2d n( d1.Y() * theScaleX, -d1.X() * theScaleY);
481 if ( E.Orientation() == TopAbs_REVERSED )
487 // define step size by which to move theUV
489 gp_Pnt2d nextUV; // uv of next node on edge, most distant of the four
490 gp_Pnt2d thisUV( theUV.x, theUV.y );
491 double maxDist = -DBL_MAX;
492 TopTools_ListIteratorOfListOfShape aEIt (EList);
493 list< double >::iterator aUIt = UList.begin();
494 for ( ; aEIt.More(); aEIt.Next(), aUIt++ )
496 const TopoDS_Edge& E = TopoDS::Edge( aEIt.Value() );
498 Handle(Geom2d_Curve) C2d = BRep_Tool::CurveOnSurface(E, theF, f, l);
500 double umin = DBL_MAX, umax = -DBL_MAX;
501 SMDS_NodeIteratorPtr nIt = theMesh.GetSubMesh(E)->GetSubMeshDS()->GetNodes();
502 if ( !nIt->more() ) // no nodes on edge, only on vertices
508 while ( nIt->more() ) {
509 const SMDS_MeshNode* node = nIt->next();
510 // check if node is medium
511 if ( theCreateQuadratic && SMESH_MesherHelper::IsMedium( node, SMDSAbs_Edge ))
513 const SMDS_EdgePosition* epos =
514 static_cast<const SMDS_EdgePosition*>(node->GetPosition().get());
515 double u = epos->GetUParameter();
522 bool isFirstCommon = ( *aUIt == f );
523 gp_Pnt2d uv = C2d->Value( isFirstCommon ? umin : umax );
524 double dist = thisUV.SquareDistance( uv );
525 if ( dist > maxDist ) {
531 uv0.x = thisUV.X(); uv0.y = thisUV.Y();
532 uv1.x = nextUV.X(); uv1.y = nextUV.Y();
533 uv2.x = thisUV.X(); uv2.y = thisUV.Y();
535 uv1.x *= theScaleX; uv1.y *= theScaleY;
537 if ( fixOverlappedLinkUV( uv0, uv1, uv2 ))
539 double step = thisUV.Distance( gp_Pnt2d( uv0.x, uv0.y ));
541 // move theUV along the normal by the step
545 MESSAGE("--fixCommonVertexUV move(" << theUV.x << " " << theUV.x
546 << ") by (" << N.X() << " " << N.Y() << ")"
547 << endl << "--- MAX DIST " << maxDist);
557 //=============================================================================
561 //=============================================================================
563 bool StdMeshers_MEFISTO_2D::LoadPoints(TWireVector & wires,
565 vector<const SMDS_MeshNode*>& mefistoToDS,
569 // to avoid passing same uv points for a vertex common to 2 wires
571 TopTools_IndexedDataMapOfShapeListOfShape VWMap;
572 if ( wires.size() > 1 )
574 F = TopoDS::Face( myTool->GetSubShape() );
575 TopExp::MapShapesAndAncestors( F, TopAbs_VERTEX, TopAbs_WIRE, VWMap );
577 for ( int iW = 0; iW < wires.size(); ++iW )
578 nbVertices += wires[ iW ]->NbEdges();
579 if ( nbVertices == VWMap.Extent() )
580 VWMap.Clear(); // wires have no common vertices
585 for ( int iW = 0; iW < wires.size(); ++iW )
587 const vector<UVPtStruct>& uvPtVec = wires[ iW ]->GetUVPtStruct();
588 if ( uvPtVec.size() != wires[ iW ]->NbPoints() ) {
589 return error(COMPERR_BAD_INPUT_MESH,SMESH_Comment("Unexpected nb of points on wire ")
590 << iW << ": " << uvPtVec.size()<<" != "<<wires[ iW ]->NbPoints()
591 << ", probably because of invalid node parameters on geom edges");
593 if ( m + uvPtVec.size()-1 > mefistoToDS.size() ) {
594 MESSAGE("Wrong mefistoToDS.size: "<<mefistoToDS.size()<<" < "<<m + uvPtVec.size()-1);
595 return error("Internal error");
598 list< int > mOnVertex;
599 vector<UVPtStruct>::const_iterator uvPt = uvPtVec.begin();
600 for ( ++uvPt; uvPt != uvPtVec.end(); ++uvPt )
602 // bind mefisto ID to node
603 mefistoToDS[m] = uvPt->node;
605 uvslf[m].x = uvPt->u * scalex;
606 uvslf[m].y = uvPt->v * scaley;
607 if ( uvPt->node->GetPosition()->GetTypeOfPosition() == SMDS_TOP_VERTEX )
608 mOnVertex.push_back( m );
612 int mFirst = mOnVertex.front(), mLast = m - 1;
613 list< int >::iterator mIt = mOnVertex.begin();
614 for ( ; mIt != mOnVertex.end(); ++mIt)
617 if ( iW && !VWMap.IsEmpty()) { // except outer wire
618 // avoid passing same uv point for a vertex common to 2 wires
619 int vID = mefistoToDS[m]->GetPosition()->GetShapeId();
620 TopoDS_Vertex V = TopoDS::Vertex( myTool->GetMeshDS()->IndexToShape( vID ));
621 if ( fixCommonVertexUV( uvslf[m], V, F, VWMap, *myTool->GetMesh(),
622 scalex, scaley, _quadraticMesh )) {
623 myNodesOnCommonV.push_back( mefistoToDS[m] );
627 // prevent failure on overlapped adjacent links,
628 // check only links ending in vertex nodes
629 int mB = m - 1, mA = m + 1; // indices Before and After
630 if ( mB < mFirst ) mB = mLast;
631 if ( mA > mLast ) mA = mFirst;
632 fixOverlappedLinkUV (uvslf[ mB ], uvslf[ m ], uvslf[ mA ]);
639 //=============================================================================
643 //=============================================================================
645 void StdMeshers_MEFISTO_2D::ComputeScaleOnFace(SMESH_Mesh & aMesh,
646 const TopoDS_Face & aFace,
650 TopoDS_Wire W = BRepTools::OuterWire(aFace);
652 double xmin = 1.e300; // min & max of face 2D parametric coord.
653 double xmax = -1.e300;
654 double ymin = 1.e300;
655 double ymax = -1.e300;
660 TopExp_Explorer wexp(W, TopAbs_EDGE);
661 for ( ; wexp.More(); wexp.Next())
663 const TopoDS_Edge & E = TopoDS::Edge( wexp.Current() );
665 Handle(Geom2d_Curve) C2d = BRep_Tool::CurveOnSurface(E, aFace, f, l);
666 if ( C2d.IsNull() ) continue;
667 double du = (l - f) / double (nbp);
668 for (int i = 0; i <= nbp; i++)
670 double param = f + double (i) * du;
671 gp_Pnt2d p = C2d->Value(param);
680 // MESSAGE(" "<< f<<" "<<l<<" "<<param<<" "<<xmin<<" "<<xmax<<" "<<ymin<<" "<<ymax);
687 double xmoy = (xmax + xmin) / 2.;
688 double ymoy = (ymax + ymin) / 2.;
689 double xsize = xmax - xmin;
690 double ysize = ymax - ymin;
693 Handle(Geom_Surface) S = BRep_Tool::Surface(aFace,L); // 3D surface
697 gp_Pnt PX0 = S->Value(xmin, ymoy);
698 gp_Pnt PY0 = S->Value(xmoy, ymin);
699 double dx = xsize / double (nbp);
700 double dy = ysize / double (nbp);
701 for (int i = 1; i <= nbp; i++)
703 double x = xmin + double (i) * dx;
704 gp_Pnt PX = S->Value(x, ymoy);
705 double y = ymin + double (i) * dy;
706 gp_Pnt PY = S->Value(xmoy, y);
707 length_x += PX.Distance(PX0);
708 length_y += PY.Distance(PY0);
712 scalex = length_x / xsize;
713 scaley = length_y / ysize;
716 double xyratio = xsize*scalex/(ysize*scaley);
717 const double maxratio = 1.e2;
719 if (xyratio > maxratio) {
721 scaley *= xyratio / maxratio;
724 else if (xyratio < 1./maxratio) {
726 scalex *= 1 / xyratio / maxratio;
733 //=============================================================================
737 //=============================================================================
739 void StdMeshers_MEFISTO_2D::StoreResult(Z nbst, R2 * uvst, Z nbt, Z * nust,
740 vector< const SMDS_MeshNode*>&mefistoToDS,
741 double scalex, double scaley)
743 SMESHDS_Mesh * meshDS = myTool->GetMeshDS();
744 int faceID = myTool->GetSubShapeID();
746 TopoDS_Face F = TopoDS::Face( myTool->GetSubShape() );
747 Handle(Geom_Surface) S = BRep_Tool::Surface( F );
749 Z n = mefistoToDS.size(); // nb input points
750 mefistoToDS.resize( nbst );
751 for ( ; n < nbst; n++)
755 double u = uvst[n][0] / scalex;
756 double v = uvst[n][1] / scaley;
757 gp_Pnt P = S->Value(u, v);
759 SMDS_MeshNode * node = meshDS->AddNode(P.X(), P.Y(), P.Z());
760 meshDS->SetNodeOnFace(node, faceID, u, v);
762 //MESSAGE(P.X()<<" "<<P.Y()<<" "<<P.Z());
763 mefistoToDS[n] = node;
764 //MESSAGE("NEW: "<<n<<" "<<mefistoToDS[n+1]);
770 // triangle points must be in trigonometric order if face is Forward
771 // else they must be put clockwise
773 bool triangleIsWellOriented = ( F.Orientation() == TopAbs_FORWARD );
775 for (n = 1; n <= nbt; n++)
777 const SMDS_MeshNode * n1 = mefistoToDS[ nust[m++] - 1 ];
778 const SMDS_MeshNode * n2 = mefistoToDS[ nust[m++] - 1 ];
779 const SMDS_MeshNode * n3 = mefistoToDS[ nust[m++] - 1 ];
781 SMDS_MeshElement * elt;
782 if (triangleIsWellOriented)
783 elt = myTool->AddFace(n1, n2, n3);
785 elt = myTool->AddFace(n1, n3, n2);
787 meshDS->SetMeshElementOnShape(elt, faceID);
791 // remove bad elements built on vertices shared by wires
793 list<const SMDS_MeshNode*>::iterator itN = myNodesOnCommonV.begin();
794 for ( ; itN != myNodesOnCommonV.end(); itN++ )
796 const SMDS_MeshNode* node = *itN;
797 SMDS_ElemIteratorPtr invElemIt = node->GetInverseElementIterator();
798 while ( invElemIt->more() )
800 const SMDS_MeshElement* elem = invElemIt->next();
801 SMDS_ElemIteratorPtr itN = elem->nodesIterator();
803 while ( itN->more() )
804 if ( itN->next() == node)
807 MESSAGE( "RM bad element " << elem->GetID());
808 meshDS->RemoveElement( elem );