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"
38 #include "StdMeshers_FaceSide.hxx"
39 #include "StdMeshers_MaxElementArea.hxx"
40 #include "StdMeshers_LengthFromEdges.hxx"
45 #include "SMDS_MeshElement.hxx"
46 #include "SMDS_MeshNode.hxx"
47 #include "SMDS_EdgePosition.hxx"
48 #include "SMDS_FacePosition.hxx"
50 #include "utilities.h"
52 #include <TopoDS_Face.hxx>
53 #include <TopoDS_Edge.hxx>
54 #include <Geom_Surface.hxx>
55 #include <Geom2d_Curve.hxx>
56 #include <gp_Pnt2d.hxx>
57 #include <BRep_Tool.hxx>
58 #include <BRepTools.hxx>
59 #include <TopTools_ListIteratorOfListOfShape.hxx>
60 #include <TopTools_ListOfShape.hxx>
61 #include <TopTools_MapOfShape.hxx>
65 //=============================================================================
69 //=============================================================================
71 StdMeshers_MEFISTO_2D::StdMeshers_MEFISTO_2D(int hypId, int studyId, SMESH_Gen * gen):
72 SMESH_2D_Algo(hypId, studyId, gen)
74 MESSAGE("StdMeshers_MEFISTO_2D::StdMeshers_MEFISTO_2D");
76 _shapeType = (1 << TopAbs_FACE);
77 _compatibleHypothesis.push_back("MaxElementArea");
78 _compatibleHypothesis.push_back("LengthFromEdges");
82 _hypMaxElementArea = NULL;
83 _hypLengthFromEdges = NULL;
87 //=============================================================================
91 //=============================================================================
93 StdMeshers_MEFISTO_2D::~StdMeshers_MEFISTO_2D()
95 MESSAGE("StdMeshers_MEFISTO_2D::~StdMeshers_MEFISTO_2D");
98 //=============================================================================
102 //=============================================================================
104 bool StdMeshers_MEFISTO_2D::CheckHypothesis
106 const TopoDS_Shape& aShape,
107 SMESH_Hypothesis::Hypothesis_Status& aStatus)
109 _hypMaxElementArea = NULL;
110 _hypLengthFromEdges = NULL;
112 list <const SMESHDS_Hypothesis * >::const_iterator itl;
113 const SMESHDS_Hypothesis *theHyp;
115 const list <const SMESHDS_Hypothesis * >&hyps = GetUsedHypothesis(aMesh, aShape);
116 int nbHyp = hyps.size();
119 aStatus = SMESH_Hypothesis::HYP_MISSING;
120 return false; // can't work with no hypothesis
124 theHyp = (*itl); // use only the first hypothesis
126 string hypName = theHyp->GetName();
130 if (hypName == "MaxElementArea")
132 _hypMaxElementArea = static_cast<const StdMeshers_MaxElementArea *>(theHyp);
133 ASSERT(_hypMaxElementArea);
134 _maxElementArea = _hypMaxElementArea->GetMaxArea();
137 aStatus = SMESH_Hypothesis::HYP_OK;
140 else if (hypName == "LengthFromEdges")
142 _hypLengthFromEdges = static_cast<const StdMeshers_LengthFromEdges *>(theHyp);
143 ASSERT(_hypLengthFromEdges);
147 aStatus = SMESH_Hypothesis::HYP_OK;
150 aStatus = SMESH_Hypothesis::HYP_INCOMPATIBLE;
155 if (_maxElementArea > 0)
157 //_edgeLength = 2 * sqrt(_maxElementArea); // triangles : minorant
158 _edgeLength = sqrt(2. * _maxElementArea/sqrt(3.0));
162 isOk = (_hypLengthFromEdges != NULL); // **** check mode
164 aStatus = SMESH_Hypothesis::HYP_BAD_PARAMETER;
170 //=============================================================================
174 //=============================================================================
176 bool StdMeshers_MEFISTO_2D::Compute(SMESH_Mesh & aMesh, const TopoDS_Shape & aShape)
178 MESSAGE("StdMeshers_MEFISTO_2D::Compute");
180 TopoDS_Face F = TopoDS::Face(aShape.Oriented(TopAbs_FORWARD));
181 const bool ignoreMediumNodes = _quadraticMesh;
183 // get all edges of a face
185 list< TopoDS_Edge > edges;
186 list< int > nbEdgesInWires;
187 int nbWires = SMESH_Block::GetOrderedEdges (F, V1, edges, nbEdgesInWires);
189 if (_hypLengthFromEdges) _edgeLength = 0;
191 // split list of all edges into separate wires
192 TWireVector wires ( nbWires );
193 list< int >::iterator nbE = nbEdgesInWires.begin();
194 list< TopoDS_Edge >::iterator from, to;
195 from = to = edges.begin();
196 for ( int iW = 0; iW < nbWires; ++iW )
198 std::advance( to, *nbE++ );
199 list< TopoDS_Edge > wireEdges( from, to );
200 // assure that there is a node on the first vertex
201 // as StdMeshers_FaceSide::GetUVPtStruct() requires
202 while ( !VertexNode( TopExp::FirstVertex( wireEdges.front(), true),
205 wireEdges.splice(wireEdges.end(), wireEdges,
206 wireEdges.begin(), ++wireEdges.begin());
207 if ( from->IsSame( wireEdges.front() )) {
208 MESSAGE( "No nodes on vertices on wire " << iW+1);
212 StdMeshers_FaceSide* wire = new StdMeshers_FaceSide( F, wireEdges, &aMesh,
213 true, ignoreMediumNodes);
214 wires[ iW ] = StdMeshers_FaceSidePtr( wire );
215 if (_hypLengthFromEdges && wire->NbSegments() )
216 _edgeLength += wire->Length() / wire->NbSegments();
219 if ( wires[0]->NbSegments() < 3 ) // ex: a circle with 2 segments
222 if (_hypLengthFromEdges && _edgeLength < DBL_MIN )
225 // helper builds a quadratic mesh if necessary
226 myTool = new SMESH_MesherHelper(aMesh);
227 auto_ptr<SMESH_MesherHelper> helperDeleter( myTool );
228 _quadraticMesh = myTool->IsQuadraticSubMesh(aShape);
230 Z nblf; //nombre de lignes fermees (enveloppe en tete)
231 Z *nudslf = NULL; //numero du dernier sommet de chaque ligne fermee
233 Z nbpti = 0; //nombre points internes futurs sommets de la triangulation
242 Z nutysu = 1; // 1: il existe un fonction areteideale_()
243 // Z nutysu=0; // 0: on utilise aretmx
244 R aretmx = _edgeLength; // longueur max aretes future triangulation
248 nudslf = new Z[1 + nblf];
253 // count nb of input points
254 for ( int iW = 0; iW < nbWires; ++iW )
256 nbpnt += wires[iW]->NbSegments();
257 nudslf[iw++] = nbpnt;
260 uvslf = new R2[nudslf[nblf]];
262 double scalex, scaley;
263 ComputeScaleOnFace(aMesh, F, scalex, scaley);
265 // correspondence mefisto index --> Nodes
266 vector< const SMDS_MeshNode*> mefistoToDS(nbpnt, (const SMDS_MeshNode*)0);
270 // fill input points UV
271 if ( LoadPoints(wires, uvslf, mefistoToDS, scalex, scaley) )
274 aptrte(nutysu, aretmx,
275 nblf, nudslf, uvslf, nbpti, uvpti, nbst, uvst, nbt, nust, ierr);
279 MESSAGE("... End Triangulation Generated Triangle Number " << nbt);
280 MESSAGE(" Node Number " << nbst);
281 StoreResult(nbst, uvst, nbt, nust, mefistoToDS, scalex, scaley);
286 MESSAGE("Error in Triangulation");
289 if (nudslf != NULL) delete[]nudslf;
290 if (uvslf != NULL) delete[]uvslf;
291 if (uvst != NULL) delete[]uvst;
292 if (nust != NULL) delete[]nust;
297 //=======================================================================
298 //function : fixOverlappedLinkUV
299 //purpose : prevent failure due to overlapped adjacent links
300 //=======================================================================
302 static bool fixOverlappedLinkUV( R2& uv0, const R2& uv1, const R2& uv2 )
304 gp_XY v1( uv0.x - uv1.x, uv0.y - uv1.y );
305 gp_XY v2( uv2.x - uv1.x, uv2.y - uv1.y );
307 double tol2 = DBL_MIN * DBL_MIN;
308 double sqMod1 = v1.SquareModulus();
309 if ( sqMod1 <= tol2 ) return false;
310 double sqMod2 = v2.SquareModulus();
311 if ( sqMod2 <= tol2 ) return false;
315 // check sinus >= 1.e-3
316 const double minSin = 1.e-3;
317 if ( dot > 0 && 1 - dot * dot / ( sqMod1 * sqMod2 ) < minSin * minSin ) {
318 MESSAGE(" ___ FIX UV ____" << uv0.x << " " << uv0.y);
319 v1.SetCoord( -v1.Y(), v1.X() );
320 double delta = sqrt( sqMod1 ) * minSin;
330 // MESSAGE(" -> " << uv0.x << " " << uv0.y << " ");
331 // MESSAGE("v1( " << v1.X() << " " << v1.Y() << " ) " <<
332 // "v2( " << v2.X() << " " << v2.Y() << " ) ");
333 // MESSAGE("SIN: " << sqrt(1 - dot * dot / (sqMod1 * sqMod2)));
334 // v1.SetCoord( uv0.x - uv1.x, uv0.y - uv1.y );
335 // v2.SetCoord( uv2.x - uv1.x, uv2.y - uv1.y );
336 // gp_XY v3( uv2.x - uv0.x, uv2.y - uv0.y );
337 // sqMod1 = v1.SquareModulus();
338 // sqMod2 = v2.SquareModulus();
340 // double sin = sqrt(1 - dot * dot / (sqMod1 * sqMod2));
341 // MESSAGE("NEW SIN: " << sin);
348 //=======================================================================
349 //function : fixCommonVertexUV
351 //=======================================================================
353 static bool fixCommonVertexUV (R2 & theUV,
354 const TopoDS_Vertex& theV,
355 const TopoDS_Face& theF,
356 const TopTools_IndexedDataMapOfShapeListOfShape & theVWMap,
357 SMESH_Mesh & theMesh,
358 const double theScaleX,
359 const double theScaleY,
360 const bool theCreateQuadratic)
362 if( !theVWMap.Contains( theV )) return false;
364 // check if there is another wire sharing theV
365 const TopTools_ListOfShape& WList = theVWMap.FindFromKey( theV );
366 TopTools_ListIteratorOfListOfShape aWIt;
367 TopTools_MapOfShape aWires;
368 for ( aWIt.Initialize( WList ); aWIt.More(); aWIt.Next() )
369 aWires.Add( aWIt.Value() );
370 if ( aWires.Extent() < 2 ) return false;
372 TopoDS_Shape anOuterWire = BRepTools::OuterWire(theF);
373 TopoDS_Shape anInnerWire;
374 for ( aWIt.Initialize( WList ); aWIt.More() && anInnerWire.IsNull(); aWIt.Next() )
375 if ( !anOuterWire.IsSame( aWIt.Value() ))
376 anInnerWire = aWIt.Value();
378 TopTools_ListOfShape EList;
379 list< double > UList;
381 // find edges of theW sharing theV
382 // and find 2d normal to them at theV
384 TopoDS_Iterator itE( anInnerWire );
385 for ( ; itE.More(); itE.Next() )
387 const TopoDS_Edge& E = TopoDS::Edge( itE.Value() );
388 TopoDS_Iterator itV( E );
389 for ( ; itV.More(); itV.Next() )
391 const TopoDS_Vertex & V = TopoDS::Vertex( itV.Value() );
392 if ( !V.IsSame( theV ))
395 Standard_Real u = BRep_Tool::Parameter( V, E );
396 UList.push_back( u );
398 Handle(Geom2d_Curve) C2d = BRep_Tool::CurveOnSurface(E, theF, f, l);
402 gp_Vec2d n( d1.Y() * theScaleX, -d1.X() * theScaleY);
403 if ( E.Orientation() == TopAbs_REVERSED )
409 // define step size by which to move theUV
411 gp_Pnt2d nextUV; // uv of next node on edge, most distant of the four
412 gp_Pnt2d thisUV( theUV.x, theUV.y );
413 double maxDist = -DBL_MAX;
414 TopTools_ListIteratorOfListOfShape aEIt (EList);
415 list< double >::iterator aUIt = UList.begin();
416 for ( ; aEIt.More(); aEIt.Next(), aUIt++ )
418 const TopoDS_Edge& E = TopoDS::Edge( aEIt.Value() );
420 Handle(Geom2d_Curve) C2d = BRep_Tool::CurveOnSurface(E, theF, f, l);
422 double umin = DBL_MAX, umax = -DBL_MAX;
423 SMDS_NodeIteratorPtr nIt = theMesh.GetSubMesh(E)->GetSubMeshDS()->GetNodes();
424 if ( !nIt->more() ) // no nodes on edge, only on vertices
430 while ( nIt->more() ) {
431 const SMDS_MeshNode* node = nIt->next();
432 // check if node is medium
433 if ( theCreateQuadratic && SMESH_MesherHelper::IsMedium( node, SMDSAbs_Edge ))
435 const SMDS_EdgePosition* epos =
436 static_cast<const SMDS_EdgePosition*>(node->GetPosition().get());
437 double u = epos->GetUParameter();
444 bool isFirstCommon = ( *aUIt == f );
445 gp_Pnt2d uv = C2d->Value( isFirstCommon ? umin : umax );
446 double dist = thisUV.SquareDistance( uv );
447 if ( dist > maxDist ) {
453 uv0.x = thisUV.X(); uv0.y = thisUV.Y();
454 uv1.x = nextUV.X(); uv1.y = nextUV.Y();
455 uv2.x = thisUV.X(); uv2.y = thisUV.Y();
457 uv1.x *= theScaleX; uv1.y *= theScaleY;
459 if ( fixOverlappedLinkUV( uv0, uv1, uv2 ))
461 double step = thisUV.Distance( gp_Pnt2d( uv0.x, uv0.y ));
463 // move theUV along the normal by the step
467 MESSAGE("--fixCommonVertexUV move(" << theUV.x << " " << theUV.x
468 << ") by (" << N.X() << " " << N.Y() << ")"
469 << endl << "--- MAX DIST " << maxDist);
479 //=============================================================================
483 //=============================================================================
485 bool StdMeshers_MEFISTO_2D::LoadPoints(TWireVector & wires,
487 vector<const SMDS_MeshNode*>& mefistoToDS,
491 // to avoid passing same uv points for a vertex common to 2 wires
493 TopTools_IndexedDataMapOfShapeListOfShape VWMap;
494 if ( wires.size() > 1 )
496 F = TopoDS::Face( myTool->GetSubShape() );
497 TopExp::MapShapesAndAncestors( F, TopAbs_VERTEX, TopAbs_WIRE, VWMap );
499 for ( int iW = 0; iW < wires.size(); ++iW )
500 nbVertices += wires[ iW ]->NbSegments();
501 if ( nbVertices == VWMap.Extent() )
502 VWMap.Clear(); // wires have no common vertices
505 const bool isXConst = false; // meaningles here
506 const double constValue = 0; // meaningles here
509 list< int > mOnVertex;
511 for ( int iW = 0; iW < wires.size(); ++iW )
513 const vector<UVPtStruct>& uvPtVec = wires[ iW ]->GetUVPtStruct(isXConst,constValue);
514 if ( uvPtVec.size() != wires[ iW ]->NbPoints() ) {
515 MESSAGE("Wrong nb UVPtStruct: "<<uvPtVec.size()<<" != "<<wires[ iW ]->NbPoints());
519 vector<UVPtStruct>::const_iterator uvPt = uvPtVec.begin();
520 for ( ++uvPt; uvPt != uvPtVec.end(); ++uvPt )
522 // bind mefisto ID to node
523 mefistoToDS[m] = uvPt->node;
525 uvslf[m].x = uvPt->u * scalex;
526 uvslf[m].y = uvPt->v * scaley;
527 if ( uvPt->node->GetPosition()->GetTypeOfPosition() == SMDS_TOP_VERTEX )
528 mOnVertex.push_back( m );
532 int mFirst = mOnVertex.front(), mLast = m - 1;
533 list< int >::iterator mIt = mOnVertex.begin();
534 for ( ; mIt != mOnVertex.end(); ++mIt)
537 if ( iW && !VWMap.IsEmpty()) { // except outer wire
538 // avoid passing same uv point for a vertex common to 2 wires
539 int vID = mefistoToDS[m]->GetPosition()->GetShapeId();
540 TopoDS_Vertex V = TopoDS::Vertex( myTool->GetMeshDS()->IndexToShape( vID ));
541 if ( fixCommonVertexUV( uvslf[m], V, F, VWMap, *myTool->GetMesh(),
542 scalex, scaley, _quadraticMesh )) {
543 myNodesOnCommonV.push_back( mefistoToDS[m] );
547 // prevent failure on overlapped adjacent links,
548 // check only links ending in vertex nodes
549 int mB = m - 1, mA = m + 1; // indices Before and After
550 if ( mB < mFirst ) mB = mLast;
551 if ( mA > mLast ) mA = mFirst;
552 fixOverlappedLinkUV (uvslf[ mB ], uvslf[ m ], uvslf[ mA ]);
559 //=============================================================================
563 //=============================================================================
565 void StdMeshers_MEFISTO_2D::ComputeScaleOnFace(SMESH_Mesh & aMesh,
566 const TopoDS_Face & aFace,
570 TopoDS_Wire W = BRepTools::OuterWire(aFace);
572 double xmin = 1.e300; // min & max of face 2D parametric coord.
573 double xmax = -1.e300;
574 double ymin = 1.e300;
575 double ymax = -1.e300;
580 TopExp_Explorer wexp(W, TopAbs_EDGE);
581 for ( ; wexp.More(); wexp.Next())
583 const TopoDS_Edge & E = TopoDS::Edge( wexp.Current() );
585 Handle(Geom2d_Curve) C2d = BRep_Tool::CurveOnSurface(E, aFace, f, l);
586 if ( C2d.IsNull() ) continue;
587 double du = (l - f) / double (nbp);
588 for (int i = 0; i <= nbp; i++)
590 double param = f + double (i) * du;
591 gp_Pnt2d p = C2d->Value(param);
600 // MESSAGE(" "<< f<<" "<<l<<" "<<param<<" "<<xmin<<" "<<xmax<<" "<<ymin<<" "<<ymax);
607 double xmoy = (xmax + xmin) / 2.;
608 double ymoy = (ymax + ymin) / 2.;
609 double xsize = xmax - xmin;
610 double ysize = ymax - ymin;
613 Handle(Geom_Surface) S = BRep_Tool::Surface(aFace,L); // 3D surface
617 gp_Pnt PX0 = S->Value(xmin, ymoy);
618 gp_Pnt PY0 = S->Value(xmoy, ymin);
619 double dx = xsize / double (nbp);
620 double dy = ysize / double (nbp);
621 for (int i = 1; i <= nbp; i++)
623 double x = xmin + double (i) * dx;
624 gp_Pnt PX = S->Value(x, ymoy);
625 double y = ymin + double (i) * dy;
626 gp_Pnt PY = S->Value(xmoy, y);
627 length_x += PX.Distance(PX0);
628 length_y += PY.Distance(PY0);
632 scalex = length_x / xsize;
633 scaley = length_y / ysize;
636 double xyratio = xsize*scalex/(ysize*scaley);
637 const double maxratio = 1.e2;
639 if (xyratio > maxratio) {
641 scaley *= xyratio / maxratio;
644 else if (xyratio < 1./maxratio) {
646 scalex *= 1 / xyratio / maxratio;
653 //=============================================================================
657 //=============================================================================
659 void StdMeshers_MEFISTO_2D::StoreResult(Z nbst, R2 * uvst, Z nbt, Z * nust,
660 vector< const SMDS_MeshNode*>&mefistoToDS,
661 double scalex, double scaley)
663 SMESHDS_Mesh * meshDS = myTool->GetMeshDS();
664 int faceID = myTool->GetSubShapeID();
666 TopoDS_Face F = TopoDS::Face( myTool->GetSubShape() );
667 Handle(Geom_Surface) S = BRep_Tool::Surface( F );
669 Z n = mefistoToDS.size(); // nb input points
670 mefistoToDS.resize( nbst );
671 for ( ; n < nbst; n++)
675 double u = uvst[n][0] / scalex;
676 double v = uvst[n][1] / scaley;
677 gp_Pnt P = S->Value(u, v);
679 SMDS_MeshNode * node = meshDS->AddNode(P.X(), P.Y(), P.Z());
680 meshDS->SetNodeOnFace(node, faceID, u, v);
682 //MESSAGE(P.X()<<" "<<P.Y()<<" "<<P.Z());
683 mefistoToDS[n] = node;
684 //MESSAGE("NEW: "<<n<<" "<<mefistoToDS[n+1]);
690 // triangle points must be in trigonometric order if face is Forward
691 // else they must be put clockwise
693 bool triangleIsWellOriented = ( F.Orientation() == TopAbs_FORWARD );
695 for (n = 1; n <= nbt; n++)
697 const SMDS_MeshNode * n1 = mefistoToDS[ nust[m++] - 1 ];
698 const SMDS_MeshNode * n2 = mefistoToDS[ nust[m++] - 1 ];
699 const SMDS_MeshNode * n3 = mefistoToDS[ nust[m++] - 1 ];
701 SMDS_MeshElement * elt;
702 if (triangleIsWellOriented)
703 elt = myTool->AddFace(n1, n2, n3);
705 elt = myTool->AddFace(n1, n3, n2);
707 meshDS->SetMeshElementOnShape(elt, faceID);
711 // remove bad elements built on vertices shared by wires
713 list<const SMDS_MeshNode*>::iterator itN = myNodesOnCommonV.begin();
714 for ( ; itN != myNodesOnCommonV.end(); itN++ )
716 const SMDS_MeshNode* node = *itN;
717 SMDS_ElemIteratorPtr invElemIt = node->GetInverseElementIterator();
718 while ( invElemIt->more() )
720 const SMDS_MeshElement* elem = invElemIt->next();
721 SMDS_ElemIteratorPtr itN = elem->nodesIterator();
723 while ( itN->more() )
724 if ( itN->next() == node)
727 MESSAGE( "RM bad element " << elem->GetID());
728 meshDS->RemoveElement( elem );