1 // SMESH SMESH : implementaion of SMESH idl descriptions
3 // Copyright (C) 2003 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
24 // File : StdMeshers_MEFISTO_2D.cxx
25 // Moved here from SMESH_MEFISTO_2D.cxx
26 // Author : Paul RASCLE, EDF
30 #include "StdMeshers_MEFISTO_2D.hxx"
32 #include "SMESH_Gen.hxx"
33 #include "SMESH_Mesh.hxx"
34 #include "SMESH_subMesh.hxx"
35 #include "SMESH_Block.hxx"
36 #include "SMESH_MesherHelper.hxx"
37 #include "SMESH_Comment.hxx"
39 #include "StdMeshers_FaceSide.hxx"
40 #include "StdMeshers_MaxElementArea.hxx"
41 #include "StdMeshers_LengthFromEdges.hxx"
46 #include "SMDS_MeshElement.hxx"
47 #include "SMDS_MeshNode.hxx"
48 #include "SMDS_EdgePosition.hxx"
49 #include "SMDS_FacePosition.hxx"
51 #include "utilities.h"
53 #include <BRepTools.hxx>
54 #include <BRep_Tool.hxx>
55 #include <Geom2d_Curve.hxx>
56 #include <Geom_Surface.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>
70 //=============================================================================
74 //=============================================================================
76 StdMeshers_MEFISTO_2D::StdMeshers_MEFISTO_2D(int hypId, int studyId, SMESH_Gen * gen):
77 SMESH_2D_Algo(hypId, studyId, gen)
79 MESSAGE("StdMeshers_MEFISTO_2D::StdMeshers_MEFISTO_2D");
81 _shapeType = (1 << TopAbs_FACE);
82 _compatibleHypothesis.push_back("MaxElementArea");
83 _compatibleHypothesis.push_back("LengthFromEdges");
87 _hypMaxElementArea = NULL;
88 _hypLengthFromEdges = NULL;
92 //=============================================================================
96 //=============================================================================
98 StdMeshers_MEFISTO_2D::~StdMeshers_MEFISTO_2D()
100 MESSAGE("StdMeshers_MEFISTO_2D::~StdMeshers_MEFISTO_2D");
103 //=============================================================================
107 //=============================================================================
109 bool StdMeshers_MEFISTO_2D::CheckHypothesis
111 const TopoDS_Shape& aShape,
112 SMESH_Hypothesis::Hypothesis_Status& aStatus)
114 _hypMaxElementArea = NULL;
115 _hypLengthFromEdges = NULL;
117 list <const SMESHDS_Hypothesis * >::const_iterator itl;
118 const SMESHDS_Hypothesis *theHyp;
120 const list <const SMESHDS_Hypothesis * >&hyps = GetUsedHypothesis(aMesh, aShape);
121 int nbHyp = hyps.size();
124 aStatus = SMESH_Hypothesis::HYP_MISSING;
125 return false; // can't work with no hypothesis
129 theHyp = (*itl); // use only the first hypothesis
131 string hypName = theHyp->GetName();
135 if (hypName == "MaxElementArea")
137 _hypMaxElementArea = static_cast<const StdMeshers_MaxElementArea *>(theHyp);
138 ASSERT(_hypMaxElementArea);
139 _maxElementArea = _hypMaxElementArea->GetMaxArea();
142 aStatus = SMESH_Hypothesis::HYP_OK;
145 else if (hypName == "LengthFromEdges")
147 _hypLengthFromEdges = static_cast<const StdMeshers_LengthFromEdges *>(theHyp);
148 ASSERT(_hypLengthFromEdges);
152 aStatus = SMESH_Hypothesis::HYP_OK;
155 aStatus = SMESH_Hypothesis::HYP_INCOMPATIBLE;
160 if (_maxElementArea > 0)
162 //_edgeLength = 2 * sqrt(_maxElementArea); // triangles : minorant
163 _edgeLength = sqrt(2. * _maxElementArea/sqrt(3.0));
167 isOk = (_hypLengthFromEdges != NULL); // **** check mode
169 aStatus = SMESH_Hypothesis::HYP_BAD_PARAMETER;
175 //=============================================================================
179 //=============================================================================
181 bool StdMeshers_MEFISTO_2D::Compute(SMESH_Mesh & aMesh, const TopoDS_Shape & aShape)
183 MESSAGE("StdMeshers_MEFISTO_2D::Compute");
185 TopoDS_Face F = TopoDS::Face(aShape.Oriented(TopAbs_FORWARD));
187 // helper builds quadratic mesh if necessary
188 SMESH_MesherHelper helper(aMesh);
190 _quadraticMesh = myTool->IsQuadraticSubMesh(aShape);
191 const bool ignoreMediumNodes = _quadraticMesh;
193 // get all edges of a face
195 TWireVector wires = StdMeshers_FaceSide::GetFaceWires( F, aMesh, ignoreMediumNodes, problem );
196 int nbWires = wires.size();
197 if ( problem && !problem->IsOK() ) return error( problem );
198 if ( nbWires == 0 ) return error( "Problem in StdMeshers_FaceSide::GetFaceWires()");
199 if ( wires[0]->NbSegments() < 3 ) // ex: a circle with 2 segments
200 return error(COMPERR_BAD_INPUT_MESH,
201 SMESH_Comment("Too few segments: ")<<wires[0]->NbSegments());
203 // compute average edge length
204 if (_hypLengthFromEdges)
208 for ( int iW = 0; iW < nbWires; ++iW )
210 StdMeshers_FaceSidePtr wire = wires[ iW ];
211 _edgeLength += wire->Length();
212 nbSegments += wire->NbSegments();
215 _edgeLength /= nbSegments;
218 if (_hypLengthFromEdges && _edgeLength < DBL_MIN )
221 Z nblf; //nombre de lignes fermees (enveloppe en tete)
222 Z *nudslf = NULL; //numero du dernier sommet de chaque ligne fermee
224 Z nbpti = 0; //nombre points internes futurs sommets de la triangulation
233 Z nutysu = 1; // 1: il existe un fonction areteideale_()
234 // Z nutysu=0; // 0: on utilise aretmx
235 R aretmx = _edgeLength; // longueur max aretes future triangulation
239 nudslf = new Z[1 + nblf];
244 // count nb of input points
245 for ( int iW = 0; iW < nbWires; ++iW )
247 nbpnt += wires[iW]->NbPoints() - 1;
248 nudslf[iw++] = nbpnt;
251 uvslf = new R2[nudslf[nblf]];
253 double scalex, scaley;
254 ComputeScaleOnFace(aMesh, F, scalex, scaley);
256 // correspondence mefisto index --> Nodes
257 vector< const SMDS_MeshNode*> mefistoToDS(nbpnt, (const SMDS_MeshNode*)0);
261 // fill input points UV
262 if ( LoadPoints(wires, uvslf, mefistoToDS, scalex, scaley) )
265 aptrte(nutysu, aretmx,
266 nblf, nudslf, uvslf, nbpti, uvpti, nbst, uvst, nbt, nust, ierr);
270 MESSAGE("... End Triangulation Generated Triangle Number " << nbt);
271 MESSAGE(" Node Number " << nbst);
272 StoreResult(nbst, uvst, nbt, nust, mefistoToDS, scalex, scaley);
277 error(ierr,"Error in Triangulation (aptrte())");
280 if (nudslf != NULL) delete[]nudslf;
281 if (uvslf != NULL) delete[]uvslf;
282 if (uvst != NULL) delete[]uvst;
283 if (nust != NULL) delete[]nust;
288 //=======================================================================
289 //function : fixOverlappedLinkUV
290 //purpose : prevent failure due to overlapped adjacent links
291 //=======================================================================
293 static bool fixOverlappedLinkUV( R2& uv0, const R2& uv1, const R2& uv2 )
295 gp_XY v1( uv0.x - uv1.x, uv0.y - uv1.y );
296 gp_XY v2( uv2.x - uv1.x, uv2.y - uv1.y );
298 double tol2 = DBL_MIN * DBL_MIN;
299 double sqMod1 = v1.SquareModulus();
300 if ( sqMod1 <= tol2 ) return false;
301 double sqMod2 = v2.SquareModulus();
302 if ( sqMod2 <= tol2 ) return false;
306 // check sinus >= 1.e-3
307 const double minSin = 1.e-3;
308 if ( dot > 0 && 1 - dot * dot / ( sqMod1 * sqMod2 ) < minSin * minSin ) {
309 MESSAGE(" ___ FIX UV ____" << uv0.x << " " << uv0.y);
310 v1.SetCoord( -v1.Y(), v1.X() );
311 double delta = sqrt( sqMod1 ) * minSin;
321 // MESSAGE(" -> " << uv0.x << " " << uv0.y << " ");
322 // MESSAGE("v1( " << v1.X() << " " << v1.Y() << " ) " <<
323 // "v2( " << v2.X() << " " << v2.Y() << " ) ");
324 // MESSAGE("SIN: " << sqrt(1 - dot * dot / (sqMod1 * sqMod2)));
325 // v1.SetCoord( uv0.x - uv1.x, uv0.y - uv1.y );
326 // v2.SetCoord( uv2.x - uv1.x, uv2.y - uv1.y );
327 // gp_XY v3( uv2.x - uv0.x, uv2.y - uv0.y );
328 // sqMod1 = v1.SquareModulus();
329 // sqMod2 = v2.SquareModulus();
331 // double sin = sqrt(1 - dot * dot / (sqMod1 * sqMod2));
332 // MESSAGE("NEW SIN: " << sin);
339 //=======================================================================
340 //function : fixCommonVertexUV
342 //=======================================================================
344 static bool fixCommonVertexUV (R2 & theUV,
345 const TopoDS_Vertex& theV,
346 const TopoDS_Face& theF,
347 const TopTools_IndexedDataMapOfShapeListOfShape & theVWMap,
348 SMESH_Mesh & theMesh,
349 const double theScaleX,
350 const double theScaleY,
351 const bool theCreateQuadratic)
353 if( !theVWMap.Contains( theV )) return false;
355 // check if there is another wire sharing theV
356 const TopTools_ListOfShape& WList = theVWMap.FindFromKey( theV );
357 TopTools_ListIteratorOfListOfShape aWIt;
358 TopTools_MapOfShape aWires;
359 for ( aWIt.Initialize( WList ); aWIt.More(); aWIt.Next() )
360 aWires.Add( aWIt.Value() );
361 if ( aWires.Extent() < 2 ) return false;
363 TopoDS_Shape anOuterWire = BRepTools::OuterWire(theF);
364 TopoDS_Shape anInnerWire;
365 for ( aWIt.Initialize( WList ); aWIt.More() && anInnerWire.IsNull(); aWIt.Next() )
366 if ( !anOuterWire.IsSame( aWIt.Value() ))
367 anInnerWire = aWIt.Value();
369 TopTools_ListOfShape EList;
370 list< double > UList;
372 // find edges of theW sharing theV
373 // and find 2d normal to them at theV
375 TopoDS_Iterator itE( anInnerWire );
376 for ( ; itE.More(); itE.Next() )
378 const TopoDS_Edge& E = TopoDS::Edge( itE.Value() );
379 TopoDS_Iterator itV( E );
380 for ( ; itV.More(); itV.Next() )
382 const TopoDS_Vertex & V = TopoDS::Vertex( itV.Value() );
383 if ( !V.IsSame( theV ))
386 Standard_Real u = BRep_Tool::Parameter( V, E );
387 UList.push_back( u );
389 Handle(Geom2d_Curve) C2d = BRep_Tool::CurveOnSurface(E, theF, f, l);
393 gp_Vec2d n( d1.Y() * theScaleX, -d1.X() * theScaleY);
394 if ( E.Orientation() == TopAbs_REVERSED )
400 // define step size by which to move theUV
402 gp_Pnt2d nextUV; // uv of next node on edge, most distant of the four
403 gp_Pnt2d thisUV( theUV.x, theUV.y );
404 double maxDist = -DBL_MAX;
405 TopTools_ListIteratorOfListOfShape aEIt (EList);
406 list< double >::iterator aUIt = UList.begin();
407 for ( ; aEIt.More(); aEIt.Next(), aUIt++ )
409 const TopoDS_Edge& E = TopoDS::Edge( aEIt.Value() );
411 Handle(Geom2d_Curve) C2d = BRep_Tool::CurveOnSurface(E, theF, f, l);
413 double umin = DBL_MAX, umax = -DBL_MAX;
414 SMDS_NodeIteratorPtr nIt = theMesh.GetSubMesh(E)->GetSubMeshDS()->GetNodes();
415 if ( !nIt->more() ) // no nodes on edge, only on vertices
421 while ( nIt->more() ) {
422 const SMDS_MeshNode* node = nIt->next();
423 // check if node is medium
424 if ( theCreateQuadratic && SMESH_MesherHelper::IsMedium( node, SMDSAbs_Edge ))
426 const SMDS_EdgePosition* epos =
427 static_cast<const SMDS_EdgePosition*>(node->GetPosition().get());
428 double u = epos->GetUParameter();
435 bool isFirstCommon = ( *aUIt == f );
436 gp_Pnt2d uv = C2d->Value( isFirstCommon ? umin : umax );
437 double dist = thisUV.SquareDistance( uv );
438 if ( dist > maxDist ) {
444 uv0.x = thisUV.X(); uv0.y = thisUV.Y();
445 uv1.x = nextUV.X(); uv1.y = nextUV.Y();
446 uv2.x = thisUV.X(); uv2.y = thisUV.Y();
448 uv1.x *= theScaleX; uv1.y *= theScaleY;
450 if ( fixOverlappedLinkUV( uv0, uv1, uv2 ))
452 double step = thisUV.Distance( gp_Pnt2d( uv0.x, uv0.y ));
454 // move theUV along the normal by the step
458 MESSAGE("--fixCommonVertexUV move(" << theUV.x << " " << theUV.x
459 << ") by (" << N.X() << " " << N.Y() << ")"
460 << endl << "--- MAX DIST " << maxDist);
470 //=============================================================================
474 //=============================================================================
476 bool StdMeshers_MEFISTO_2D::LoadPoints(TWireVector & wires,
478 vector<const SMDS_MeshNode*>& mefistoToDS,
482 // to avoid passing same uv points for a vertex common to 2 wires
484 TopTools_IndexedDataMapOfShapeListOfShape VWMap;
485 if ( wires.size() > 1 )
487 F = TopoDS::Face( myTool->GetSubShape() );
488 TopExp::MapShapesAndAncestors( F, TopAbs_VERTEX, TopAbs_WIRE, VWMap );
490 for ( int iW = 0; iW < wires.size(); ++iW )
491 nbVertices += wires[ iW ]->NbEdges();
492 if ( nbVertices == VWMap.Extent() )
493 VWMap.Clear(); // wires have no common vertices
497 list< int > mOnVertex;
499 for ( int iW = 0; iW < wires.size(); ++iW )
501 const vector<UVPtStruct>& uvPtVec = wires[ iW ]->GetUVPtStruct();
502 if ( uvPtVec.size() != wires[ iW ]->NbPoints() ) {
503 return error(COMPERR_BAD_INPUT_MESH,SMESH_Comment("Unexpected nb of points on wire ")
504 << iW << uvPtVec.size()<<" != "<<wires[ iW ]->NbPoints());
506 if ( m + uvPtVec.size()-1 > mefistoToDS.size() ) {
507 MESSAGE("Wrong mefistoToDS.size: "<<mefistoToDS.size()<<" < "<<m + uvPtVec.size()-1);
508 return error("Internal error");
511 vector<UVPtStruct>::const_iterator uvPt = uvPtVec.begin();
512 for ( ++uvPt; uvPt != uvPtVec.end(); ++uvPt )
514 // bind mefisto ID to node
515 mefistoToDS[m] = uvPt->node;
517 uvslf[m].x = uvPt->u * scalex;
518 uvslf[m].y = uvPt->v * scaley;
519 if ( uvPt->node->GetPosition()->GetTypeOfPosition() == SMDS_TOP_VERTEX )
520 mOnVertex.push_back( m );
524 int mFirst = mOnVertex.front(), mLast = m - 1;
525 list< int >::iterator mIt = mOnVertex.begin();
526 for ( ; mIt != mOnVertex.end(); ++mIt)
529 if ( iW && !VWMap.IsEmpty()) { // except outer wire
530 // avoid passing same uv point for a vertex common to 2 wires
531 int vID = mefistoToDS[m]->GetPosition()->GetShapeId();
532 TopoDS_Vertex V = TopoDS::Vertex( myTool->GetMeshDS()->IndexToShape( vID ));
533 if ( fixCommonVertexUV( uvslf[m], V, F, VWMap, *myTool->GetMesh(),
534 scalex, scaley, _quadraticMesh )) {
535 myNodesOnCommonV.push_back( mefistoToDS[m] );
539 // prevent failure on overlapped adjacent links,
540 // check only links ending in vertex nodes
541 int mB = m - 1, mA = m + 1; // indices Before and After
542 if ( mB < mFirst ) mB = mLast;
543 if ( mA > mLast ) mA = mFirst;
544 fixOverlappedLinkUV (uvslf[ mB ], uvslf[ m ], uvslf[ mA ]);
551 //=============================================================================
555 //=============================================================================
557 void StdMeshers_MEFISTO_2D::ComputeScaleOnFace(SMESH_Mesh & aMesh,
558 const TopoDS_Face & aFace,
562 TopoDS_Wire W = BRepTools::OuterWire(aFace);
564 double xmin = 1.e300; // min & max of face 2D parametric coord.
565 double xmax = -1.e300;
566 double ymin = 1.e300;
567 double ymax = -1.e300;
572 TopExp_Explorer wexp(W, TopAbs_EDGE);
573 for ( ; wexp.More(); wexp.Next())
575 const TopoDS_Edge & E = TopoDS::Edge( wexp.Current() );
577 Handle(Geom2d_Curve) C2d = BRep_Tool::CurveOnSurface(E, aFace, f, l);
578 if ( C2d.IsNull() ) continue;
579 double du = (l - f) / double (nbp);
580 for (int i = 0; i <= nbp; i++)
582 double param = f + double (i) * du;
583 gp_Pnt2d p = C2d->Value(param);
592 // MESSAGE(" "<< f<<" "<<l<<" "<<param<<" "<<xmin<<" "<<xmax<<" "<<ymin<<" "<<ymax);
599 double xmoy = (xmax + xmin) / 2.;
600 double ymoy = (ymax + ymin) / 2.;
601 double xsize = xmax - xmin;
602 double ysize = ymax - ymin;
605 Handle(Geom_Surface) S = BRep_Tool::Surface(aFace,L); // 3D surface
609 gp_Pnt PX0 = S->Value(xmin, ymoy);
610 gp_Pnt PY0 = S->Value(xmoy, ymin);
611 double dx = xsize / double (nbp);
612 double dy = ysize / double (nbp);
613 for (int i = 1; i <= nbp; i++)
615 double x = xmin + double (i) * dx;
616 gp_Pnt PX = S->Value(x, ymoy);
617 double y = ymin + double (i) * dy;
618 gp_Pnt PY = S->Value(xmoy, y);
619 length_x += PX.Distance(PX0);
620 length_y += PY.Distance(PY0);
624 scalex = length_x / xsize;
625 scaley = length_y / ysize;
628 double xyratio = xsize*scalex/(ysize*scaley);
629 const double maxratio = 1.e2;
631 if (xyratio > maxratio) {
633 scaley *= xyratio / maxratio;
636 else if (xyratio < 1./maxratio) {
638 scalex *= 1 / xyratio / maxratio;
645 //=============================================================================
649 //=============================================================================
651 void StdMeshers_MEFISTO_2D::StoreResult(Z nbst, R2 * uvst, Z nbt, Z * nust,
652 vector< const SMDS_MeshNode*>&mefistoToDS,
653 double scalex, double scaley)
655 SMESHDS_Mesh * meshDS = myTool->GetMeshDS();
656 int faceID = myTool->GetSubShapeID();
658 TopoDS_Face F = TopoDS::Face( myTool->GetSubShape() );
659 Handle(Geom_Surface) S = BRep_Tool::Surface( F );
661 Z n = mefistoToDS.size(); // nb input points
662 mefistoToDS.resize( nbst );
663 for ( ; n < nbst; n++)
667 double u = uvst[n][0] / scalex;
668 double v = uvst[n][1] / scaley;
669 gp_Pnt P = S->Value(u, v);
671 SMDS_MeshNode * node = meshDS->AddNode(P.X(), P.Y(), P.Z());
672 meshDS->SetNodeOnFace(node, faceID, u, v);
674 //MESSAGE(P.X()<<" "<<P.Y()<<" "<<P.Z());
675 mefistoToDS[n] = node;
676 //MESSAGE("NEW: "<<n<<" "<<mefistoToDS[n+1]);
682 // triangle points must be in trigonometric order if face is Forward
683 // else they must be put clockwise
685 bool triangleIsWellOriented = ( F.Orientation() == TopAbs_FORWARD );
687 for (n = 1; n <= nbt; n++)
689 const SMDS_MeshNode * n1 = mefistoToDS[ nust[m++] - 1 ];
690 const SMDS_MeshNode * n2 = mefistoToDS[ nust[m++] - 1 ];
691 const SMDS_MeshNode * n3 = mefistoToDS[ nust[m++] - 1 ];
693 SMDS_MeshElement * elt;
694 if (triangleIsWellOriented)
695 elt = myTool->AddFace(n1, n2, n3);
697 elt = myTool->AddFace(n1, n3, n2);
699 meshDS->SetMeshElementOnShape(elt, faceID);
703 // remove bad elements built on vertices shared by wires
705 list<const SMDS_MeshNode*>::iterator itN = myNodesOnCommonV.begin();
706 for ( ; itN != myNodesOnCommonV.end(); itN++ )
708 const SMDS_MeshNode* node = *itN;
709 SMDS_ElemIteratorPtr invElemIt = node->GetInverseElementIterator();
710 while ( invElemIt->more() )
712 const SMDS_MeshElement* elem = invElemIt->next();
713 SMDS_ElemIteratorPtr itN = elem->nodesIterator();
715 while ( itN->more() )
716 if ( itN->next() == node)
719 MESSAGE( "RM bad element " << elem->GetID());
720 meshDS->RemoveElement( elem );