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));
182 // get all edges of a face
184 list< TopoDS_Edge > edges;
185 list< int > nbEdgesInWires;
186 int nbWires = SMESH_Block::GetOrderedEdges (F, V1, edges, nbEdgesInWires);
188 if (_hypLengthFromEdges) _edgeLength = 0;
190 // split list of all edges into separate wires
191 TWireVector wires ( nbWires );
192 list< int >::iterator nbE = nbEdgesInWires.begin();
193 list< TopoDS_Edge >::iterator from, to;
194 from = to = edges.begin();
195 for ( int iW = 0; iW < nbWires; ++iW )
197 std::advance( to, *nbE++ );
198 list< TopoDS_Edge > wireEdges( from, to );
199 // assure that there is a node on the first vertex
200 // as StdMeshers_FaceSide::GetUVPtStruct() requires
201 while ( !VertexNode( TopExp::FirstVertex( wireEdges.front(), true),
204 wireEdges.splice(wireEdges.end(), wireEdges,
205 wireEdges.begin(), ++wireEdges.begin());
206 if ( from->IsSame( wireEdges.front() )) {
207 MESSAGE( "No nodes on vertices on wire " << iW+1);
211 StdMeshers_FaceSide* wire = new StdMeshers_FaceSide( F, wireEdges, &aMesh, true );
212 wires[ iW ] = StdMeshers_FaceSidePtr( wire );
213 if (_hypLengthFromEdges && wire->NbSegments() )
214 _edgeLength += wire->Length() / wire->NbSegments();
217 if ( wires[0]->NbSegments() < 3 ) // ex: a circle with 2 segments
220 if (_hypLengthFromEdges && _edgeLength < DBL_MIN )
223 // helper builds a quadratic mesh if necessary
224 myTool = new SMESH_MesherHelper(aMesh);
225 auto_ptr<SMESH_MesherHelper> helperDeleter( myTool );
226 _quadraticMesh = myTool->IsQuadraticSubMesh(aShape);
228 Z nblf; //nombre de lignes fermees (enveloppe en tete)
229 Z *nudslf = NULL; //numero du dernier sommet de chaque ligne fermee
231 Z nbpti = 0; //nombre points internes futurs sommets de la triangulation
240 Z nutysu = 1; // 1: il existe un fonction areteideale_()
241 // Z nutysu=0; // 0: on utilise aretmx
242 R aretmx = _edgeLength; // longueur max aretes future triangulation
246 nudslf = new Z[1 + nblf];
251 // count nb of input points
252 for ( int iW = 0; iW < nbWires; ++iW )
254 nbpnt += wires[iW]->NbSegments();
255 nudslf[iw++] = nbpnt;
258 uvslf = new R2[nudslf[nblf]];
260 double scalex, scaley;
261 ComputeScaleOnFace(aMesh, F, scalex, scaley);
263 // correspondence mefisto index --> Nodes
264 vector< const SMDS_MeshNode*> mefistoToDS(nbpnt, (const SMDS_MeshNode*)0);
268 // fill input points UV
269 if ( LoadPoints(wires, uvslf, mefistoToDS, scalex, scaley) )
272 aptrte(nutysu, aretmx,
273 nblf, nudslf, uvslf, nbpti, uvpti, nbst, uvst, nbt, nust, ierr);
277 MESSAGE("... End Triangulation Generated Triangle Number " << nbt);
278 MESSAGE(" Node Number " << nbst);
279 StoreResult(nbst, uvst, nbt, nust, mefistoToDS, scalex, scaley);
284 MESSAGE("Error in Triangulation");
287 if (nudslf != NULL) delete[]nudslf;
288 if (uvslf != NULL) delete[]uvslf;
289 if (uvst != NULL) delete[]uvst;
290 if (nust != NULL) delete[]nust;
295 //=======================================================================
296 //function : fixOverlappedLinkUV
297 //purpose : prevent failure due to overlapped adjacent links
298 //=======================================================================
300 static bool fixOverlappedLinkUV( R2& uv0, const R2& uv1, const R2& uv2 )
302 gp_XY v1( uv0.x - uv1.x, uv0.y - uv1.y );
303 gp_XY v2( uv2.x - uv1.x, uv2.y - uv1.y );
305 double tol2 = DBL_MIN * DBL_MIN;
306 double sqMod1 = v1.SquareModulus();
307 if ( sqMod1 <= tol2 ) return false;
308 double sqMod2 = v2.SquareModulus();
309 if ( sqMod2 <= tol2 ) return false;
313 // check sinus >= 1.e-3
314 const double minSin = 1.e-3;
315 if ( dot > 0 && 1 - dot * dot / ( sqMod1 * sqMod2 ) < minSin * minSin ) {
316 MESSAGE(" ___ FIX UV ____" << uv0.x << " " << uv0.y);
317 v1.SetCoord( -v1.Y(), v1.X() );
318 double delta = sqrt( sqMod1 ) * minSin;
328 // MESSAGE(" -> " << uv0.x << " " << uv0.y << " ");
329 // MESSAGE("v1( " << v1.X() << " " << v1.Y() << " ) " <<
330 // "v2( " << v2.X() << " " << v2.Y() << " ) ");
331 // MESSAGE("SIN: " << sqrt(1 - dot * dot / (sqMod1 * sqMod2)));
332 // v1.SetCoord( uv0.x - uv1.x, uv0.y - uv1.y );
333 // v2.SetCoord( uv2.x - uv1.x, uv2.y - uv1.y );
334 // gp_XY v3( uv2.x - uv0.x, uv2.y - uv0.y );
335 // sqMod1 = v1.SquareModulus();
336 // sqMod2 = v2.SquareModulus();
338 // double sin = sqrt(1 - dot * dot / (sqMod1 * sqMod2));
339 // MESSAGE("NEW SIN: " << sin);
346 //=======================================================================
347 //function : fixCommonVertexUV
349 //=======================================================================
351 static bool fixCommonVertexUV (R2 & theUV,
352 const TopoDS_Vertex& theV,
353 const TopoDS_Face& theF,
354 const TopTools_IndexedDataMapOfShapeListOfShape & theVWMap,
355 SMESH_Mesh & theMesh,
356 const double theScaleX,
357 const double theScaleY,
358 const bool theCreateQuadratic)
360 if( !theVWMap.Contains( theV )) return false;
362 // check if there is another wire sharing theV
363 const TopTools_ListOfShape& WList = theVWMap.FindFromKey( theV );
364 TopTools_ListIteratorOfListOfShape aWIt;
365 TopTools_MapOfShape aWires;
366 for ( aWIt.Initialize( WList ); aWIt.More(); aWIt.Next() )
367 aWires.Add( aWIt.Value() );
368 if ( aWires.Extent() < 2 ) return false;
370 TopoDS_Shape anOuterWire = BRepTools::OuterWire(theF);
371 TopoDS_Shape anInnerWire;
372 for ( aWIt.Initialize( WList ); aWIt.More() && anInnerWire.IsNull(); aWIt.Next() )
373 if ( !anOuterWire.IsSame( aWIt.Value() ))
374 anInnerWire = aWIt.Value();
376 TopTools_ListOfShape EList;
377 list< double > UList;
379 // find edges of theW sharing theV
380 // and find 2d normal to them at theV
382 TopoDS_Iterator itE( anInnerWire );
383 for ( ; itE.More(); itE.Next() )
385 const TopoDS_Edge& E = TopoDS::Edge( itE.Value() );
386 TopoDS_Iterator itV( E );
387 for ( ; itV.More(); itV.Next() )
389 const TopoDS_Vertex & V = TopoDS::Vertex( itV.Value() );
390 if ( !V.IsSame( theV ))
393 Standard_Real u = BRep_Tool::Parameter( V, E );
394 UList.push_back( u );
396 Handle(Geom2d_Curve) C2d = BRep_Tool::CurveOnSurface(E, theF, f, l);
400 gp_Vec2d n( d1.Y() * theScaleX, -d1.X() * theScaleY);
401 if ( E.Orientation() == TopAbs_REVERSED )
407 // define step size by which to move theUV
409 gp_Pnt2d nextUV; // uv of next node on edge, most distant of the four
410 gp_Pnt2d thisUV( theUV.x, theUV.y );
411 double maxDist = -DBL_MAX;
412 TopTools_ListIteratorOfListOfShape aEIt (EList);
413 list< double >::iterator aUIt = UList.begin();
414 for ( ; aEIt.More(); aEIt.Next(), aUIt++ )
416 const TopoDS_Edge& E = TopoDS::Edge( aEIt.Value() );
418 Handle(Geom2d_Curve) C2d = BRep_Tool::CurveOnSurface(E, theF, f, l);
420 double umin = DBL_MAX, umax = -DBL_MAX;
421 SMDS_NodeIteratorPtr nIt = theMesh.GetSubMesh(E)->GetSubMeshDS()->GetNodes();
422 if ( !nIt->more() ) // no nodes on edge, only on vertices
428 while ( nIt->more() ) {
429 const SMDS_MeshNode* node = nIt->next();
430 // check if node is medium
431 if ( theCreateQuadratic && SMESH_MesherHelper::IsMedium( node, SMDSAbs_Edge ))
433 const SMDS_EdgePosition* epos =
434 static_cast<const SMDS_EdgePosition*>(node->GetPosition().get());
435 double u = epos->GetUParameter();
442 bool isFirstCommon = ( *aUIt == f );
443 gp_Pnt2d uv = C2d->Value( isFirstCommon ? umin : umax );
444 double dist = thisUV.SquareDistance( uv );
445 if ( dist > maxDist ) {
451 uv0.x = thisUV.X(); uv0.y = thisUV.Y();
452 uv1.x = nextUV.X(); uv1.y = nextUV.Y();
453 uv2.x = thisUV.X(); uv2.y = thisUV.Y();
455 uv1.x *= theScaleX; uv1.y *= theScaleY;
457 if ( fixOverlappedLinkUV( uv0, uv1, uv2 ))
459 double step = thisUV.Distance( gp_Pnt2d( uv0.x, uv0.y ));
461 // move theUV along the normal by the step
465 MESSAGE("--fixCommonVertexUV move(" << theUV.x << " " << theUV.x
466 << ") by (" << N.X() << " " << N.Y() << ")"
467 << endl << "--- MAX DIST " << maxDist);
477 //=============================================================================
481 //=============================================================================
483 bool StdMeshers_MEFISTO_2D::LoadPoints(TWireVector & wires,
485 vector<const SMDS_MeshNode*>& mefistoToDS,
489 // to avoid passing same uv points for a vertex common to 2 wires
491 TopTools_IndexedDataMapOfShapeListOfShape VWMap;
492 if ( wires.size() > 1 )
494 F = TopoDS::Face( myTool->GetSubShape() );
495 TopExp::MapShapesAndAncestors( F, TopAbs_VERTEX, TopAbs_WIRE, VWMap );
497 for ( int iW = 0; iW < wires.size(); ++iW )
498 nbVertices += wires[ iW ]->NbSegments();
499 if ( nbVertices == VWMap.Extent() )
500 VWMap.Clear(); // wires have no common vertices
503 const bool isXConst = false; // meaningles here
504 const double constValue = 0; // meaningles here
507 list< int > mOnVertex;
509 for ( int iW = 0; iW < wires.size(); ++iW )
511 const vector<UVPtStruct>& uvPtVec = wires[ iW ]->GetUVPtStruct(isXConst,constValue);
512 if ( uvPtVec.size() != wires[ iW ]->NbPoints() ) {
513 MESSAGE("Wrong nb UVPtStruct: "<<uvPtVec.size()<<" != "<<wires[ iW ]->NbPoints());
517 vector<UVPtStruct>::const_iterator uvPt = uvPtVec.begin();
518 for ( ++uvPt; uvPt != uvPtVec.end(); ++uvPt )
520 // bind mefisto ID to node
521 mefistoToDS[m] = uvPt->node;
523 uvslf[m].x = uvPt->u * scalex;
524 uvslf[m].y = uvPt->v * scaley;
525 if ( uvPt->node->GetPosition()->GetTypeOfPosition() == SMDS_TOP_VERTEX )
526 mOnVertex.push_back( m );
530 int mFirst = mOnVertex.front(), mLast = m - 1;
531 list< int >::iterator mIt = mOnVertex.begin();
532 for ( ; mIt != mOnVertex.end(); ++mIt)
535 if ( iW && !VWMap.IsEmpty()) { // except outer wire
536 // avoid passing same uv point for a vertex common to 2 wires
537 int vID = mefistoToDS[m]->GetPosition()->GetShapeId();
538 TopoDS_Vertex V = TopoDS::Vertex( myTool->GetMeshDS()->IndexToShape( vID ));
539 if ( fixCommonVertexUV( uvslf[m], V, F, VWMap, *myTool->GetMesh(),
540 scalex, scaley, _quadraticMesh )) {
541 myNodesOnCommonV.push_back( mefistoToDS[m] );
545 // prevent failure on overlapped adjacent links,
546 // check only links ending in vertex nodes
547 int mB = m - 1, mA = m + 1; // indices Before and After
548 if ( mB < mFirst ) mB = mLast;
549 if ( mA > mLast ) mA = mFirst;
550 fixOverlappedLinkUV (uvslf[ mB ], uvslf[ m ], uvslf[ mA ]);
557 //=============================================================================
561 //=============================================================================
563 void StdMeshers_MEFISTO_2D::ComputeScaleOnFace(SMESH_Mesh & aMesh,
564 const TopoDS_Face & aFace,
568 TopoDS_Wire W = BRepTools::OuterWire(aFace);
570 double xmin = 1.e300; // min & max of face 2D parametric coord.
571 double xmax = -1.e300;
572 double ymin = 1.e300;
573 double ymax = -1.e300;
578 TopExp_Explorer wexp(W, TopAbs_EDGE);
579 for ( ; wexp.More(); wexp.Next())
581 const TopoDS_Edge & E = TopoDS::Edge( wexp.Current() );
583 Handle(Geom2d_Curve) C2d = BRep_Tool::CurveOnSurface(E, aFace, f, l);
584 if ( C2d.IsNull() ) continue;
585 double du = (l - f) / double (nbp);
586 for (int i = 0; i <= nbp; i++)
588 double param = f + double (i) * du;
589 gp_Pnt2d p = C2d->Value(param);
598 // MESSAGE(" "<< f<<" "<<l<<" "<<param<<" "<<xmin<<" "<<xmax<<" "<<ymin<<" "<<ymax);
605 double xmoy = (xmax + xmin) / 2.;
606 double ymoy = (ymax + ymin) / 2.;
607 double xsize = xmax - xmin;
608 double ysize = ymax - ymin;
611 Handle(Geom_Surface) S = BRep_Tool::Surface(aFace,L); // 3D surface
615 gp_Pnt PX0 = S->Value(xmin, ymoy);
616 gp_Pnt PY0 = S->Value(xmoy, ymin);
617 double dx = xsize / double (nbp);
618 double dy = ysize / double (nbp);
619 for (int i = 1; i <= nbp; i++)
621 double x = xmin + double (i) * dx;
622 gp_Pnt PX = S->Value(x, ymoy);
623 double y = ymin + double (i) * dy;
624 gp_Pnt PY = S->Value(xmoy, y);
625 length_x += PX.Distance(PX0);
626 length_y += PY.Distance(PY0);
630 scalex = length_x / xsize;
631 scaley = length_y / ysize;
634 double xyratio = xsize*scalex/(ysize*scaley);
635 const double maxratio = 1.e2;
637 if (xyratio > maxratio) {
639 scaley *= xyratio / maxratio;
642 else if (xyratio < 1./maxratio) {
644 scalex *= 1 / xyratio / maxratio;
651 //=============================================================================
655 //=============================================================================
657 void StdMeshers_MEFISTO_2D::StoreResult(Z nbst, R2 * uvst, Z nbt, Z * nust,
658 vector< const SMDS_MeshNode*>&mefistoToDS,
659 double scalex, double scaley)
661 SMESHDS_Mesh * meshDS = myTool->GetMeshDS();
662 int faceID = myTool->GetSubShapeID();
664 TopoDS_Face F = TopoDS::Face( myTool->GetSubShape() );
665 Handle(Geom_Surface) S = BRep_Tool::Surface( F );
667 Z n = mefistoToDS.size(); // nb input points
668 mefistoToDS.resize( nbst );
669 for ( ; n < nbst; n++)
673 double u = uvst[n][0] / scalex;
674 double v = uvst[n][1] / scaley;
675 gp_Pnt P = S->Value(u, v);
677 SMDS_MeshNode * node = meshDS->AddNode(P.X(), P.Y(), P.Z());
678 meshDS->SetNodeOnFace(node, faceID, u, v);
680 //MESSAGE(P.X()<<" "<<P.Y()<<" "<<P.Z());
681 mefistoToDS[n] = node;
682 //MESSAGE("NEW: "<<n<<" "<<mefistoToDS[n+1]);
688 // triangle points must be in trigonometric order if face is Forward
689 // else they must be put clockwise
691 bool triangleIsWellOriented = ( F.Orientation() == TopAbs_FORWARD );
693 for (n = 1; n <= nbt; n++)
695 const SMDS_MeshNode * n1 = mefistoToDS[ nust[m++] - 1 ];
696 const SMDS_MeshNode * n2 = mefistoToDS[ nust[m++] - 1 ];
697 const SMDS_MeshNode * n3 = mefistoToDS[ nust[m++] - 1 ];
699 SMDS_MeshElement * elt;
700 if (triangleIsWellOriented)
701 elt = myTool->AddFace(n1, n2, n3);
703 elt = myTool->AddFace(n1, n3, n2);
705 meshDS->SetMeshElementOnShape(elt, faceID);
709 // remove bad elements built on vertices shared by wires
711 list<const SMDS_MeshNode*>::iterator itN = myNodesOnCommonV.begin();
712 for ( ; itN != myNodesOnCommonV.end(); itN++ )
714 const SMDS_MeshNode* node = *itN;
715 SMDS_ElemIteratorPtr invElemIt = node->GetInverseElementIterator();
716 while ( invElemIt->more() )
718 const SMDS_MeshElement* elem = invElemIt->next();
719 SMDS_ElemIteratorPtr itN = elem->nodesIterator();
721 while ( itN->more() )
722 if ( itN->next() == node)
725 MESSAGE( "RM bad element " << elem->GetID());
726 meshDS->RemoveElement( elem );