1 // Copyright (C) 2007-2014 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, or (at your option) any later version.
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
23 // SMESH SMESH : implementaion of SMESH idl descriptions
24 // File : StdMeshers_Projection_2D.cxx
26 // Created : Fri Oct 20 11:37:07 2006
27 // Author : Edward AGAPOV (eap)
29 #include "StdMeshers_Projection_2D.hxx"
31 #include "StdMeshers_ProjectionSource2D.hxx"
32 #include "StdMeshers_ProjectionUtils.hxx"
33 #include "StdMeshers_FaceSide.hxx"
35 #include "SMDS_EdgePosition.hxx"
36 #include "SMDS_FacePosition.hxx"
37 #include "SMESHDS_Hypothesis.hxx"
38 #include "SMESHDS_SubMesh.hxx"
39 #include "SMESH_Block.hxx"
40 #include "SMESH_Comment.hxx"
41 #include "SMESH_Gen.hxx"
42 #include "SMESH_Mesh.hxx"
43 #include "SMESH_MesherHelper.hxx"
44 #include "SMESH_Pattern.hxx"
45 #include "SMESH_subMesh.hxx"
46 #include "SMESH_subMeshEventListener.hxx"
48 #include "utilities.h"
50 #include <BRepAdaptor_Surface.hxx>
51 #include <BRep_Tool.hxx>
52 #include <Bnd_B2d.hxx>
53 #include <GeomAPI_ProjectPointOnSurf.hxx>
54 #include <GeomLib_IsPlanarSurface.hxx>
56 #include <TopExp_Explorer.hxx>
57 #include <TopTools_DataMapIteratorOfDataMapOfShapeShape.hxx>
58 #include <TopTools_ListIteratorOfListOfShape.hxx>
66 #define RETURN_BAD_RESULT(msg) { MESSAGE(")-: Error: " << msg); return false; }
68 namespace TAssocTool = StdMeshers_ProjectionUtils;
69 //typedef StdMeshers_ProjectionUtils TAssocTool;
71 //=======================================================================
72 //function : StdMeshers_Projection_2D
74 //=======================================================================
76 StdMeshers_Projection_2D::StdMeshers_Projection_2D(int hypId, int studyId, SMESH_Gen* gen)
77 :SMESH_2D_Algo(hypId, studyId, gen)
79 _name = "Projection_2D";
80 _compatibleHypothesis.push_back("ProjectionSource2D");
84 //================================================================================
88 //================================================================================
90 StdMeshers_Projection_2D::~StdMeshers_Projection_2D()
93 //=======================================================================
94 //function : CheckHypothesis
96 //=======================================================================
98 bool StdMeshers_Projection_2D::CheckHypothesis(SMESH_Mesh& theMesh,
99 const TopoDS_Shape& theShape,
100 SMESH_Hypothesis::Hypothesis_Status& theStatus)
102 list <const SMESHDS_Hypothesis * >::const_iterator itl;
104 const list <const SMESHDS_Hypothesis * >&hyps = GetUsedHypothesis(theMesh, theShape);
105 if ( hyps.size() == 0 )
107 theStatus = HYP_MISSING;
108 return false; // can't work with no hypothesis
111 if ( hyps.size() > 1 )
113 theStatus = HYP_ALREADY_EXIST;
117 const SMESHDS_Hypothesis *theHyp = hyps.front();
119 string hypName = theHyp->GetName();
123 if (hypName == "ProjectionSource2D")
125 _sourceHypo = static_cast<const StdMeshers_ProjectionSource2D *>(theHyp);
127 // Check hypo parameters
129 SMESH_Mesh* srcMesh = _sourceHypo->GetSourceMesh();
130 SMESH_Mesh* tgtMesh = & theMesh;
135 if ( _sourceHypo->HasVertexAssociation() )
138 TopoDS_Shape edge = TAssocTool::GetEdgeByVertices
139 ( srcMesh, _sourceHypo->GetSourceVertex(1), _sourceHypo->GetSourceVertex(2) );
140 if ( edge.IsNull() ||
141 !SMESH_MesherHelper::IsSubShape( edge, srcMesh ) ||
142 !SMESH_MesherHelper::IsSubShape( edge, _sourceHypo->GetSourceFace() ))
144 theStatus = HYP_BAD_PARAMETER;
145 error("Invalid source vertices");
146 SCRUTE((edge.IsNull()));
147 SCRUTE((SMESH_MesherHelper::IsSubShape( edge, srcMesh )));
148 SCRUTE((SMESH_MesherHelper::IsSubShape( edge, _sourceHypo->GetSourceFace() )));
153 edge = TAssocTool::GetEdgeByVertices
154 ( tgtMesh, _sourceHypo->GetTargetVertex(1), _sourceHypo->GetTargetVertex(2) );
155 if ( edge.IsNull() || !SMESH_MesherHelper::IsSubShape( edge, tgtMesh ))
157 theStatus = HYP_BAD_PARAMETER;
158 error("Invalid target vertices");
159 SCRUTE((edge.IsNull()));
160 SCRUTE((SMESH_MesherHelper::IsSubShape( edge, tgtMesh )));
163 else if ( !_sourceHypo->IsCompoundSource() &&
164 !SMESH_MesherHelper::IsSubShape( edge, theShape ))
166 theStatus = HYP_BAD_PARAMETER;
167 error("Invalid target vertices");
168 SCRUTE((SMESH_MesherHelper::IsSubShape( edge, theShape )));
172 // check a source face
173 if ( !SMESH_MesherHelper::IsSubShape( _sourceHypo->GetSourceFace(), srcMesh ) ||
174 ( srcMesh == tgtMesh && theShape == _sourceHypo->GetSourceFace() ))
176 theStatus = HYP_BAD_PARAMETER;
177 error("Invalid source face");
178 SCRUTE((SMESH_MesherHelper::IsSubShape( _sourceHypo->GetSourceFace(), srcMesh )));
179 SCRUTE((srcMesh == tgtMesh));
180 SCRUTE(( theShape == _sourceHypo->GetSourceFace() ));
185 theStatus = HYP_INCOMPATIBLE;
187 return ( theStatus == HYP_OK );
192 //================================================================================
194 * \brief define if a node is new or old
195 * \param node - node to check
196 * \retval bool - true if the node existed before Compute() is called
198 //================================================================================
200 bool isOldNode( const SMDS_MeshNode* node )
202 // old nodes are shared by edges and new ones are shared
203 // only by faces created by mapper
204 //if ( is1DComputed )
206 bool isOld = node->NbInverseElements(SMDSAbs_Edge) > 0;
211 // SMDS_ElemIteratorPtr invFace = node->GetInverseElementIterator(SMDSAbs_Face);
212 // bool isNew = invFace->more();
217 //================================================================================
219 * \brief Class to remove mesh built by pattern mapper on edges
220 * and vertices in the case of failure of projection algo.
221 * It does it's job at destruction
223 //================================================================================
228 MeshCleaner( SMESH_subMesh* faceSubMesh ): sm(faceSubMesh) {}
229 ~MeshCleaner() { Clean(sm); }
230 void Release() { sm = 0; } // mesh will not be removed
231 static void Clean( SMESH_subMesh* sm, bool withSub=true )
233 if ( !sm || !sm->GetSubMeshDS() ) return;
234 // PAL16567, 18920. Remove face nodes as well
235 // switch ( sm->GetSubShape().ShapeType() ) {
236 // case TopAbs_VERTEX:
237 // case TopAbs_EDGE: {
238 SMDS_NodeIteratorPtr nIt = sm->GetSubMeshDS()->GetNodes();
239 SMESHDS_Mesh* mesh = sm->GetFather()->GetMeshDS();
240 while ( nIt->more() ) {
241 const SMDS_MeshNode* node = nIt->next();
242 if ( !isOldNode( node ) )
243 mesh->RemoveNode( node );
245 // do not break but iterate over DependsOn()
248 if ( !withSub ) return;
249 SMESH_subMeshIteratorPtr smIt = sm->getDependsOnIterator(false,false);
250 while ( smIt->more() )
251 Clean( smIt->next(), false );
256 //================================================================================
258 * \brief find new nodes belonging to one free border of mesh on face
259 * \param sm - submesh on edge or vertex containg nodes to choose from
260 * \param face - the face bound by the submesh
261 * \param u2nodes - map to fill with nodes
262 * \param seamNodes - set of found nodes
263 * \retval bool - is a success
265 //================================================================================
267 bool getBoundaryNodes ( SMESH_subMesh* sm,
268 const TopoDS_Face& face,
269 map< double, const SMDS_MeshNode* > & u2nodes,
270 set< const SMDS_MeshNode* > & seamNodes)
274 if ( !sm || !sm->GetSubMeshDS() )
275 RETURN_BAD_RESULT("Null submesh");
277 SMDS_NodeIteratorPtr nIt = sm->GetSubMeshDS()->GetNodes();
278 switch ( sm->GetSubShape().ShapeType() ) {
280 case TopAbs_VERTEX: {
281 while ( nIt->more() ) {
282 const SMDS_MeshNode* node = nIt->next();
283 if ( isOldNode( node ) ) continue;
284 u2nodes.insert( make_pair( 0., node ));
285 seamNodes.insert( node );
292 // Get submeshes of sub-vertices
293 const map< int, SMESH_subMesh * >& subSM = sm->DependsOn();
294 if ( subSM.size() != 2 )
295 RETURN_BAD_RESULT("there must be 2 submeshes of sub-vertices"
296 " but we have " << subSM.size());
297 SMESH_subMesh* smV1 = subSM.begin()->second;
298 SMESH_subMesh* smV2 = subSM.rbegin()->second;
299 if ( !smV1->IsMeshComputed() || !smV2->IsMeshComputed() )
300 RETURN_BAD_RESULT("Empty vertex submeshes");
302 const SMDS_MeshNode* nV1 = 0;
303 const SMDS_MeshNode* nE = 0;
305 // Look for nV1 - a new node on V1
306 nIt = smV1->GetSubMeshDS()->GetNodes();
307 while ( nIt->more() && !nE ) {
308 const SMDS_MeshNode* node = nIt->next();
309 if ( isOldNode( node ) ) continue;
312 // Find nE - a new node connected to nV1 and belonging to edge submesh;
313 SMESHDS_SubMesh* smDS = sm->GetSubMeshDS();
314 SMDS_ElemIteratorPtr vElems = nV1->GetInverseElementIterator(SMDSAbs_Face);
315 while ( vElems->more() && !nE ) {
316 const SMDS_MeshElement* elem = vElems->next();
317 int nbNodes = elem->NbNodes();
318 if ( elem->IsQuadratic() )
320 int iV1 = elem->GetNodeIndex( nV1 );
321 // try next after nV1
322 int iE = SMESH_MesherHelper::WrapIndex( iV1 + 1, nbNodes );
323 if ( smDS->Contains( elem->GetNode( iE ) ))
324 nE = elem->GetNode( iE );
326 // try node before nV1
327 iE = SMESH_MesherHelper::WrapIndex( iV1 - 1, nbNodes );
328 if ( smDS->Contains( elem->GetNode( iE )))
329 nE = elem->GetNode( iE );
331 if ( nE && elem->IsQuadratic() ) { // find medium node between nV1 and nE
332 if ( Abs( iV1 - iE ) == 1 )
333 nE = elem->GetNode( Min ( iV1, iE ) + nbNodes );
335 nE = elem->GetNode( elem->NbNodes() - 1 );
340 RETURN_BAD_RESULT("No new node found on V1");
342 RETURN_BAD_RESULT("new node on edge not found");
344 // Get the whole free border of a face
345 list< const SMDS_MeshNode* > bordNodes;
346 list< const SMDS_MeshElement* > bordFaces;
347 if ( !SMESH_MeshEditor::FindFreeBorder (nV1, nE, nV1, bordNodes, bordFaces ))
348 RETURN_BAD_RESULT("free border of a face not found by nodes " <<
349 nV1->GetID() << " " << nE->GetID() );
351 // Insert nodes of the free border to the map until node on V2 encountered
352 SMESHDS_SubMesh* v2smDS = smV2->GetSubMeshDS();
353 list< const SMDS_MeshNode* >::iterator bordIt = bordNodes.begin();
354 bordIt++; // skip nV1
355 for ( ; bordIt != bordNodes.end(); ++bordIt ) {
356 const SMDS_MeshNode* node = *bordIt;
357 if ( v2smDS->Contains( node ))
359 if ( node->GetPosition()->GetTypeOfPosition() != SMDS_TOP_EDGE )
360 RETURN_BAD_RESULT("Bad node position type: node " << node->GetID() <<
361 " pos type " << node->GetPosition()->GetTypeOfPosition());
362 const SMDS_EdgePosition* pos =
363 static_cast<const SMDS_EdgePosition*>(node->GetPosition());
364 u2nodes.insert( make_pair( pos->GetUParameter(), node ));
365 seamNodes.insert( node );
367 if ( u2nodes.size() != seamNodes.size() )
368 RETURN_BAD_RESULT("Bad node params on edge " << sm->GetId() <<
369 ", " << u2nodes.size() << " != " << seamNodes.size() );
374 RETURN_BAD_RESULT ("Unexpected submesh type");
376 } // bool getBoundaryNodes()
378 //================================================================================
380 * \brief Check if two consecutive EDGEs are connected in 2D
381 * \param [in] E1 - a well oriented non-seam EDGE
382 * \param [in] E2 - a possibly well oriented seam EDGE
383 * \param [in] F - a FACE
384 * \return bool - result
386 //================================================================================
388 bool are2dConnected( const TopoDS_Edge & E1,
389 const TopoDS_Edge & E2,
390 const TopoDS_Face & F )
393 Handle(Geom2d_Curve) c1 = BRep_Tool::CurveOnSurface( E1, F, f, l );
394 gp_Pnt2d uvLast1 = c1->Value( E1.Orientation() == TopAbs_REVERSED ? f : l );
396 Handle(Geom2d_Curve) c2 = BRep_Tool::CurveOnSurface( E2, F, f, l );
397 gp_Pnt2d uvFirst2 = c2->Value( f );
398 gp_Pnt2d uvLast2 = c2->Value( l );
399 double tol2 = 1e-5 * uvLast2.SquareDistance( uvFirst2 );
401 return (( uvLast1.SquareDistance( uvFirst2 ) < tol2 ) ||
402 ( uvLast1.SquareDistance( uvLast2 ) < tol2 ));
405 //================================================================================
407 * \brief Compose TSideVector for both FACEs keeping matching order of EDGEs
408 * and fill src2tgtNodes map
410 //================================================================================
412 TError getWires(const TopoDS_Face& tgtFace,
413 const TopoDS_Face& srcFace,
414 SMESH_Mesh * tgtMesh,
415 SMESH_Mesh * srcMesh,
416 const TAssocTool::TShapeShapeMap& shape2ShapeMap,
417 TSideVector& srcWires,
418 TSideVector& tgtWires,
419 TAssocTool::TNodeNodeMap& src2tgtNodes,
422 SMESHDS_Mesh* tgtMeshDS = tgtMesh->GetMeshDS();
423 SMESHDS_Mesh* srcMeshDS = srcMesh->GetMeshDS();
425 src2tgtNodes.clear();
427 // get ordered src EDGEs
429 srcWires = StdMeshers_FaceSide::GetFaceWires( srcFace, *srcMesh,/*skipMediumNodes=*/0, err);
430 if ( err && !err->IsOK() )
433 // make corresponding sequence of tgt EDGEs
434 tgtWires.resize( srcWires.size() );
435 for ( size_t iW = 0; iW < srcWires.size(); ++iW )
437 list< TopoDS_Edge > tgtEdges;
438 StdMeshers_FaceSidePtr srcWire = srcWires[iW];
439 TopTools_IndexedMapOfShape edgeMap; // to detect seam edges
440 for ( int iE = 0; iE < srcWire->NbEdges(); ++iE )
442 TopoDS_Edge srcE = srcWire->Edge( iE );
443 TopoDS_Edge tgtE = TopoDS::Edge( shape2ShapeMap( srcE, /*isSrc=*/true));
444 TopoDS_Shape srcEbis = shape2ShapeMap( tgtE, /*isSrc=*/false );
445 if ( srcE.Orientation() != srcEbis.Orientation() )
447 // reverse a seam edge encountered for the second time
448 const int index = edgeMap.Add( tgtE );
449 if ( index < edgeMap.Extent() ) // E is a seam
451 // check which of edges to reverse, E or one already being in tgtEdges
452 if ( are2dConnected( tgtEdges.back(), tgtE, tgtFace ))
454 list< TopoDS_Edge >::iterator eIt = tgtEdges.begin();
455 std::advance( eIt, index-1 );
463 if ( srcWire->NbEdges() == 1 && tgtMesh == srcMesh ) // circle
465 // try to verify ori by propagation
466 pair<int,TopoDS_Edge> nE =
467 StdMeshers_ProjectionUtils::GetPropagationEdge( srcMesh, tgtE, srcE );
468 if ( !nE.second.IsNull() )
471 tgtEdges.push_back( tgtE );
474 // Fill map of src to tgt nodes with nodes on edges
476 if ( srcMesh->GetSubMesh( srcE )->IsEmpty() ||
477 tgtMesh->GetSubMesh( tgtE )->IsEmpty() )
479 // add nodes on VERTEXes for a case of not meshes EDGEs
480 const TopoDS_Shape& srcV = SMESH_MesherHelper::IthVertex( 0, srcE );
481 const TopoDS_Shape& tgtV = shape2ShapeMap( srcV, /*isSrc=*/true );
482 const SMDS_MeshNode* srcN = SMESH_Algo::VertexNode( TopoDS::Vertex( srcV ), srcMeshDS );
483 const SMDS_MeshNode* tgtN = SMESH_Algo::VertexNode( TopoDS::Vertex( tgtV ), tgtMeshDS );
485 src2tgtNodes.insert( make_pair( srcN, tgtN ));
489 const bool skipMediumNodes = true;
490 map< double, const SMDS_MeshNode* > srcNodes, tgtNodes;
491 if ( !SMESH_Algo::GetSortedNodesOnEdge( srcMeshDS, srcE, skipMediumNodes, srcNodes) ||
492 !SMESH_Algo::GetSortedNodesOnEdge( tgtMeshDS, tgtE, skipMediumNodes, tgtNodes ))
493 return SMESH_ComputeError::New( COMPERR_BAD_INPUT_MESH,
494 "Invalid node parameters on edges");
496 if (( srcNodes.size() != tgtNodes.size() ) && tgtNodes.size() > 0 )
497 return SMESH_ComputeError::New( COMPERR_BAD_INPUT_MESH,
498 "Different number of nodes on edges");
499 if ( !tgtNodes.empty() )
501 map< double, const SMDS_MeshNode* >::iterator u_tn = tgtNodes.begin();
502 if ( srcE.Orientation() == tgtE.Orientation() )
504 map< double, const SMDS_MeshNode* >::iterator u_sn = srcNodes.begin();
505 for ( ; u_tn != tgtNodes.end(); ++u_tn, ++u_sn)
506 src2tgtNodes.insert( make_pair( u_sn->second, u_tn->second ));
510 map< double, const SMDS_MeshNode* >::reverse_iterator u_sn = srcNodes.rbegin();
511 for ( ; u_tn != tgtNodes.end(); ++u_tn, ++u_sn)
512 src2tgtNodes.insert( make_pair( u_sn->second, u_tn->second ));
517 } // loop on EDGEs of a WIRE
519 tgtWires[ iW ].reset( new StdMeshers_FaceSide( tgtFace, tgtEdges, tgtMesh,
520 /*theIsForward = */ true,
521 /*theIgnoreMediumNodes = */false));
527 //================================================================================
529 * \brief Preform projection in case if tgtFace.IsPartner( srcFace ) and in case
530 * if projection by 3D transformation is possible
532 //================================================================================
534 bool projectPartner(const TopoDS_Face& tgtFace,
535 const TopoDS_Face& srcFace,
536 const TSideVector& tgtWires,
537 const TSideVector& srcWires,
538 const TAssocTool::TShapeShapeMap& shape2ShapeMap,
539 TAssocTool::TNodeNodeMap& src2tgtNodes,
540 const bool is1DComputed)
542 SMESH_Mesh * tgtMesh = tgtWires[0]->GetMesh();
543 SMESH_Mesh * srcMesh = srcWires[0]->GetMesh();
544 SMESHDS_Mesh* tgtMeshDS = tgtMesh->GetMeshDS();
545 SMESHDS_Mesh* srcMeshDS = srcMesh->GetMeshDS();
546 SMESH_MesherHelper helper( *tgtMesh );
548 const double tol = 1.e-7 * srcMeshDS->getMaxDim();
550 // transformation to get location of target nodes from source ones
551 StdMeshers_ProjectionUtils::TrsfFinder3D trsf;
552 if ( tgtFace.IsPartner( srcFace ))
554 gp_Trsf srcTrsf = srcFace.Location();
555 gp_Trsf tgtTrsf = tgtFace.Location();
556 trsf.Set( srcTrsf.Inverted() * tgtTrsf );
558 gp_Pnt srcP = BRep_Tool::Pnt( srcWires[0]->FirstVertex() );
559 gp_Pnt tgtP = BRep_Tool::Pnt( tgtWires[0]->FirstVertex() );
560 if ( tgtP.Distance( trsf.Transform( srcP )) > tol )
561 trsf.Set( tgtTrsf.Inverted() * srcTrsf );
565 // Try to find the 3D transformation
567 const int totNbSeg = 50;
568 vector< gp_XYZ > srcPnts, tgtPnts;
569 srcPnts.reserve( totNbSeg );
570 tgtPnts.reserve( totNbSeg );
571 for ( size_t iW = 0; iW < srcWires.size(); ++iW )
573 const double minSegLen = srcWires[iW]->Length() / totNbSeg;
574 for ( int iE = 0; iE < srcWires[iW]->NbEdges(); ++iE )
576 int nbSeg = Max( 1, int( srcWires[iW]->EdgeLength( iE ) / minSegLen ));
577 double srcU = srcWires[iW]->FirstParameter( iE );
578 double tgtU = tgtWires[iW]->FirstParameter( iE );
579 double srcDu = ( srcWires[iW]->LastParameter( iE )- srcU ) / nbSeg;
580 double tgtDu = ( tgtWires[iW]->LastParameter( iE )- tgtU ) / nbSeg;
581 for ( size_t i = 0; i < nbSeg; ++i )
583 srcPnts.push_back( srcWires[iW]->Value3d( srcU ).XYZ() );
584 tgtPnts.push_back( tgtWires[iW]->Value3d( tgtU ).XYZ() );
590 if ( !trsf.Solve( srcPnts, tgtPnts ))
595 bool trsfIsOK = true;
596 const int nbTestPnt = 20;
597 const size_t iStep = Max( 1, int( srcPnts.size() / nbTestPnt ));
599 for ( size_t i = 0; ( i < srcPnts.size() && trsfIsOK ); i += iStep )
601 gp_Pnt trsfTgt = trsf.Transform( srcPnts[i] );
602 trsfIsOK = ( trsfTgt.SquareDistance( tgtPnts[i] ) < tol*tol );
604 // check an in-FACE point
607 BRepAdaptor_Surface srcSurf( srcFace );
609 srcSurf.Value( 0.5 * ( srcSurf.FirstUParameter() + srcSurf.LastUParameter() ),
610 0.5 * ( srcSurf.FirstVParameter() + srcSurf.LastVParameter() ));
611 gp_Pnt tgtTrsfP = trsf.Transform( srcP );
613 GeomAPI_ProjectPointOnSurf& proj = helper.GetProjector( tgtFace, loc, 0.1*tol );
614 if ( !loc.IsIdentity() )
615 tgtTrsfP.Transform( loc.Transformation().Inverted() );
616 proj.Perform( tgtTrsfP );
617 trsfIsOK = ( proj.IsDone() &&
618 proj.NbPoints() > 0 &&
619 proj.LowerDistance() < tol );
627 // prepare the helper to adding quadratic elements if necessary
628 helper.SetSubShape( tgtFace );
629 helper.IsQuadraticSubMesh( tgtFace );
631 SMESHDS_SubMesh* srcSubDS = srcMeshDS->MeshElements( srcFace );
632 if ( !is1DComputed && srcSubDS->NbElements() )
633 helper.SetIsQuadratic( srcSubDS->GetElements()->next()->IsQuadratic() );
635 SMESH_MesherHelper srcHelper( *srcMesh );
636 srcHelper.SetSubShape( srcFace );
638 const SMDS_MeshNode* nullNode = 0;
639 TAssocTool::TNodeNodeMap::iterator srcN_tgtN;
641 // indices of nodes to create properly oriented faces
642 bool isReverse = ( !trsf.IsIdentity() );
643 int tri1 = 1, tri2 = 2, quad1 = 1, quad3 = 3;
645 std::swap( tri1, tri2 ), std::swap( quad1, quad3 );
647 SMDS_ElemIteratorPtr elemIt = srcSubDS->GetElements();
648 vector< const SMDS_MeshNode* > tgtNodes;
649 while ( elemIt->more() ) // loop on all mesh faces on srcFace
651 const SMDS_MeshElement* elem = elemIt->next();
652 const int nbN = elem->NbCornerNodes();
653 tgtNodes.resize( nbN );
654 helper.SetElementsOnShape( false );
655 for ( int i = 0; i < nbN; ++i ) // loop on nodes of the source element
657 const SMDS_MeshNode* srcNode = elem->GetNode(i);
658 srcN_tgtN = src2tgtNodes.insert( make_pair( srcNode, nullNode )).first;
659 if ( srcN_tgtN->second == nullNode )
662 gp_Pnt tgtP = trsf.Transform( SMESH_TNodeXYZ( srcNode ));
663 SMDS_MeshNode* n = helper.AddNode( tgtP.X(), tgtP.Y(), tgtP.Z() );
664 srcN_tgtN->second = n;
665 switch ( srcNode->GetPosition()->GetTypeOfPosition() )
669 gp_Pnt2d srcUV = srcHelper.GetNodeUV( srcFace, srcNode );
670 tgtMeshDS->SetNodeOnFace( n, helper.GetSubShapeID(), srcUV.X(), srcUV.Y() );
675 const TopoDS_Shape & srcE = srcMeshDS->IndexToShape( srcNode->getshapeId() );
676 const TopoDS_Shape & tgtE = shape2ShapeMap( srcE, /*isSrc=*/true );
677 double srcU = srcHelper.GetNodeU( TopoDS::Edge( srcE ), srcNode );
678 tgtMeshDS->SetNodeOnEdge( n, TopoDS::Edge( tgtE ), srcU );
681 case SMDS_TOP_VERTEX:
683 const TopoDS_Shape & srcV = srcMeshDS->IndexToShape( srcNode->getshapeId() );
684 const TopoDS_Shape & tgtV = shape2ShapeMap( srcV, /*isSrc=*/true );
685 tgtMeshDS->SetNodeOnVertex( n, TopoDS::Vertex( tgtV ));
691 tgtNodes[i] = srcN_tgtN->second;
694 helper.SetElementsOnShape( true );
697 case 3: helper.AddFace(tgtNodes[0], tgtNodes[tri1], tgtNodes[tri2]); break;
698 case 4: helper.AddFace(tgtNodes[0], tgtNodes[quad1], tgtNodes[2], tgtNodes[quad3]); break;
700 if ( isReverse ) std::reverse( tgtNodes.begin(), tgtNodes.end() );
701 helper.AddPolygonalFace( tgtNodes );
705 // check node positions
707 if ( !tgtFace.IsPartner( srcFace ) )
710 const double tol2d = 1e-12;
711 srcN_tgtN = src2tgtNodes.begin();
712 for ( ; srcN_tgtN != src2tgtNodes.end(); ++srcN_tgtN )
714 const SMDS_MeshNode* n = srcN_tgtN->second;
715 switch ( n->GetPosition()->GetTypeOfPosition() )
719 gp_XY uv = helper.GetNodeUV( tgtFace, n ), uvBis = uv;
720 if (( helper.CheckNodeUV( tgtFace, n, uv, tol )) &&
721 (( uv - uvBis ).SquareModulus() < tol2d ) &&
730 const TopoDS_Edge & tgtE = TopoDS::Edge( tgtMeshDS->IndexToShape( n->getshapeId() ));
731 double u = helper.GetNodeU( tgtE, n ), uBis = u;
732 if (( !helper.CheckNodeU( tgtE, n, u, tol )) ||
733 (( u - uBis ) < tol2d ))
744 } // bool projectPartner()
746 //================================================================================
748 * \brief Preform projection in case if the faces are similar in 2D space
750 //================================================================================
752 bool projectBy2DSimilarity(const TopoDS_Face& tgtFace,
753 const TopoDS_Face& srcFace,
754 const TSideVector& tgtWires,
755 const TSideVector& srcWires,
756 const TAssocTool::TShapeShapeMap& shape2ShapeMap,
757 TAssocTool::TNodeNodeMap& src2tgtNodes,
758 const bool is1DComputed)
760 SMESH_Mesh * tgtMesh = tgtWires[0]->GetMesh();
761 SMESH_Mesh * srcMesh = srcWires[0]->GetMesh();
763 // WARNING: we can have problems if the FACE is symmetrical in 2D,
764 // then the projection can be mirrored relating to what is expected
766 // 1) Find 2D transformation
768 StdMeshers_ProjectionUtils::TrsfFinder2D trsf;
770 // get 2 pairs of corresponding UVs
771 gp_Pnt2d srcP0 = srcWires[0]->Value2d(0.0);
772 gp_Pnt2d srcP1 = srcWires[0]->Value2d(0.333);
773 gp_Pnt2d tgtP0 = tgtWires[0]->Value2d(0.0);
774 gp_Pnt2d tgtP1 = tgtWires[0]->Value2d(0.333);
776 // make transformation
777 gp_Trsf2d fromTgtCS, toSrcCS; // from/to global CS
778 gp_Ax2d srcCS( srcP0, gp_Vec2d( srcP0, srcP1 ));
779 gp_Ax2d tgtCS( tgtP0, gp_Vec2d( tgtP0, tgtP1 ));
780 toSrcCS .SetTransformation( srcCS );
781 fromTgtCS.SetTransformation( tgtCS );
783 trsf.Set( fromTgtCS * toSrcCS );
785 // check transformation
786 bool trsfIsOK = true;
787 const double tol = 1e-5 * gp_Vec2d( srcP0, srcP1 ).Magnitude();
788 for ( double u = 0.12; ( u < 1. && trsfIsOK ); u += 0.1 )
790 gp_Pnt2d srcUV = srcWires[0]->Value2d( u );
791 gp_Pnt2d tgtUV = tgtWires[0]->Value2d( u );
792 gp_Pnt2d tgtUV2 = trsf.Transform( srcUV );
793 trsfIsOK = ( tgtUV.Distance( tgtUV2 ) < tol );
796 // Find trsf using a least-square approximation
800 const int totNbSeg = 50;
801 vector< gp_XY > srcPnts, tgtPnts;
802 srcPnts.resize( totNbSeg );
803 tgtPnts.resize( totNbSeg );
804 for ( size_t iW = 0; iW < srcWires.size(); ++iW )
806 const double minSegLen = srcWires[iW]->Length() / totNbSeg;
807 for ( int iE = 0; iE < srcWires[iW]->NbEdges(); ++iE )
809 int nbSeg = Max( 1, int( srcWires[iW]->EdgeLength( iE ) / minSegLen ));
810 double srcU = srcWires[iW]->FirstParameter( iE );
811 double tgtU = tgtWires[iW]->FirstParameter( iE );
812 double srcDu = ( srcWires[iW]->LastParameter( iE )- srcU ) / nbSeg;
813 double tgtDu = ( tgtWires[iW]->LastParameter( iE )- tgtU ) / nbSeg;
814 for ( size_t i = 0; i < nbSeg; ++i, srcU += srcDu, tgtU += tgtDu )
816 srcPnts.push_back( srcWires[iW]->Value2d( srcU ).XY() );
817 tgtPnts.push_back( tgtWires[iW]->Value2d( tgtU ).XY() );
821 if ( !trsf.Solve( srcPnts, tgtPnts ))
827 const int nbTestPnt = 10;
828 const size_t iStep = Max( 1, int( srcPnts.size() / nbTestPnt ));
829 for ( size_t i = 0; ( i < srcPnts.size() && trsfIsOK ); i += iStep )
831 gp_Pnt2d trsfTgt = trsf.Transform( srcPnts[i] );
832 trsfIsOK = ( trsfTgt.Distance( tgtPnts[i] ) < tol );
837 } // "Find transformation" block
841 SMESHDS_SubMesh* srcSubDS = srcMesh->GetMeshDS()->MeshElements( srcFace );
843 SMESH_MesherHelper helper( *tgtMesh );
844 helper.SetSubShape( tgtFace );
846 helper.IsQuadraticSubMesh( tgtFace );
848 helper.SetIsQuadratic( srcSubDS->GetElements()->next()->IsQuadratic() );
849 helper.SetElementsOnShape( true );
850 Handle(Geom_Surface) tgtSurface = BRep_Tool::Surface( tgtFace );
851 SMESHDS_Mesh* tgtMeshDS = tgtMesh->GetMeshDS();
853 SMESH_MesherHelper srcHelper( *srcMesh );
854 srcHelper.SetSubShape( srcFace );
856 const SMDS_MeshNode* nullNode = 0;
857 TAssocTool::TNodeNodeMap::iterator srcN_tgtN;
859 SMDS_ElemIteratorPtr elemIt = srcSubDS->GetElements();
860 vector< const SMDS_MeshNode* > tgtNodes;
862 while ( elemIt->more() ) // loop on all mesh faces on srcFace
864 const SMDS_MeshElement* elem = elemIt->next();
865 const int nbN = elem->NbCornerNodes();
866 tgtNodes.resize( nbN );
867 for ( int i = 0; i < nbN; ++i ) // loop on nodes of the source element
869 const SMDS_MeshNode* srcNode = elem->GetNode(i);
870 srcN_tgtN = src2tgtNodes.insert( make_pair( srcNode, nullNode )).first;
871 if ( srcN_tgtN->second == nullNode )
874 gp_Pnt2d srcUV = srcHelper.GetNodeUV( srcFace, srcNode,
875 elem->GetNode( helper.WrapIndex(i+1,nbN)), &uvOK);
876 gp_Pnt2d tgtUV = trsf.Transform( srcUV );
877 gp_Pnt tgtP = tgtSurface->Value( tgtUV.X(), tgtUV.Y() );
878 SMDS_MeshNode* n = tgtMeshDS->AddNode( tgtP.X(), tgtP.Y(), tgtP.Z() );
879 switch ( srcNode->GetPosition()->GetTypeOfPosition() )
881 case SMDS_TOP_FACE: {
882 tgtMeshDS->SetNodeOnFace( n, helper.GetSubShapeID(), tgtUV.X(), tgtUV.Y() );
885 case SMDS_TOP_EDGE: {
886 TopoDS_Shape srcEdge = srcHelper.GetSubShapeByNode( srcNode, srcHelper.GetMeshDS() );
887 TopoDS_Edge tgtEdge = TopoDS::Edge( shape2ShapeMap( srcEdge, /*isSrc=*/true ));
888 tgtMeshDS->SetNodeOnEdge( n, TopoDS::Edge( tgtEdge ));
889 double U = srcHelper.GetNodeU( TopoDS::Edge( srcEdge ), srcNode );
890 helper.CheckNodeU( tgtEdge, n, U, Precision::PConfusion());
891 n->SetPosition(SMDS_PositionPtr(new SMDS_EdgePosition( U )));
894 case SMDS_TOP_VERTEX: {
895 TopoDS_Shape srcV = srcHelper.GetSubShapeByNode( srcNode, srcHelper.GetMeshDS() );
896 TopoDS_Shape tgtV = shape2ShapeMap( srcV, /*isSrc=*/true );
897 tgtMeshDS->SetNodeOnVertex( n, TopoDS::Vertex( tgtV ));
901 srcN_tgtN->second = n;
903 tgtNodes[i] = srcN_tgtN->second;
905 // create a new face (with reversed orientation)
908 case 3: helper.AddFace(tgtNodes[0], tgtNodes[2], tgtNodes[1]); break;
909 case 4: helper.AddFace(tgtNodes[0], tgtNodes[3], tgtNodes[2], tgtNodes[1]); break;
914 } // bool projectBy2DSimilarity(...)
916 //================================================================================
918 * \brief Fix bad faces by smoothing
920 //================================================================================
922 void fixDistortedFaces( SMESH_MesherHelper& helper,
927 bool haveBadFaces = false;
929 const TopoDS_Face& F = TopoDS::Face( helper.GetSubShape() );
930 SMESHDS_SubMesh* smDS = helper.GetMeshDS()->MeshElements( F );
931 if ( !smDS || smDS->NbElements() == 0 ) return;
933 SMDS_ElemIteratorPtr faceIt = smDS->GetElements();
934 double prevArea2D = 0;
935 vector< const SMDS_MeshNode* > nodes;
937 while ( faceIt->more() && !haveBadFaces )
939 const SMDS_MeshElement* face = faceIt->next();
942 nodes.resize( face->NbCornerNodes() );
943 SMDS_MeshElement::iterator n = face->begin_nodes();
944 for ( size_t i = 0; i < nodes.size(); ++n, ++i )
947 // avoid elems on degenarate shapes as UV on them can be wrong
948 if ( helper.HasDegeneratedEdges() )
950 bool isOnDegen = false;
951 for ( size_t i = 0; ( i < nodes.size() && !isOnDegen ); ++i )
952 isOnDegen = helper.IsDegenShape( nodes[ i ]->getshapeId() );
956 // prepare to getting UVs
957 const SMDS_MeshNode* inFaceNode = 0;
958 if ( helper.HasSeam() )
959 for ( size_t i = 0; ( i < nodes.size() && !inFaceNode ); ++i )
960 if ( !helper.IsSeamShape( nodes[ i ]->getshapeId() ))
961 inFaceNode = nodes[ i ];
964 uv.resize( nodes.size() );
965 for ( size_t i = 0; i < nodes.size(); ++i )
966 uv[ i ] = helper.GetNodeUV( F, nodes[ i ], inFaceNode );
968 // compare orientation of triangles
969 for ( int iT = 0, nbT = nodes.size()-2; iT < nbT; ++iT )
971 gp_XY v1 = uv[ iT+1 ] - uv[ 0 ];
972 gp_XY v2 = uv[ iT+2 ] - uv[ 0 ];
973 double area2D = v2 ^ v1;
974 if (( haveBadFaces = ( area2D * prevArea2D < 0 )))
984 SMESH_MeshEditor editor( helper.GetMesh() );
986 TIDSortedElemSet faces;
987 for ( faceIt = smDS->GetElements(); faceIt->more(); )
988 faces.insert( faces.end(), faceIt->next() );
990 // choose smoothing algo
991 //SMESH_MeshEditor:: SmoothMethod algo = SMESH_MeshEditor::CENTROIDAL;
992 bool isConcaveBoundary = false;
994 TSideVector tgtWires =
995 StdMeshers_FaceSide::GetFaceWires( F, *helper.GetMesh(),/*skipMediumNodes=*/0, err);
996 for ( size_t iW = 0; iW < tgtWires.size() && !isConcaveBoundary; ++iW )
998 TopoDS_Edge prevEdge = tgtWires[iW]->Edge( tgtWires[iW]->NbEdges() - 1 );
999 for ( int iE = 0; iE < tgtWires[iW]->NbEdges() && !isConcaveBoundary; ++iE )
1001 double angle = helper.GetAngle( prevEdge, tgtWires[iW]->Edge( iE ),
1002 F, tgtWires[iW]->FirstVertex( iE ));
1003 isConcaveBoundary = ( angle < -5. * M_PI / 180. );
1005 prevEdge = tgtWires[iW]->Edge( iE );
1008 SMESH_MeshEditor:: SmoothMethod algo =
1009 isConcaveBoundary ? SMESH_MeshEditor::CENTROIDAL : SMESH_MeshEditor::LAPLACIAN;
1011 // smooth in 2D or 3D?
1012 TopLoc_Location loc;
1013 Handle(Geom_Surface) surface = BRep_Tool::Surface( F, loc );
1014 bool isPlanar = GeomLib_IsPlanarSurface( surface ).IsPlanar();
1017 set<const SMDS_MeshNode*> fixedNodes;
1018 editor.Smooth( faces, fixedNodes, algo, /*nbIterations=*/ 10,
1019 /*theTgtAspectRatio=*/1.0, /*the2D=*/!isPlanar);
1026 //=======================================================================
1027 //function : Compute
1029 //=======================================================================
1031 bool StdMeshers_Projection_2D::Compute(SMESH_Mesh& theMesh, const TopoDS_Shape& theShape)
1033 _src2tgtNodes.clear();
1035 MESSAGE("Projection_2D Compute");
1039 SMESH_Mesh * srcMesh = _sourceHypo->GetSourceMesh();
1040 SMESH_Mesh * tgtMesh = & theMesh;
1044 SMESHDS_Mesh * meshDS = theMesh.GetMeshDS();
1046 // ---------------------------
1047 // Make sub-shapes association
1048 // ---------------------------
1050 TopoDS_Face tgtFace = TopoDS::Face( theShape.Oriented(TopAbs_FORWARD));
1051 TopoDS_Shape srcShape = _sourceHypo->GetSourceFace().Oriented(TopAbs_FORWARD);
1053 TAssocTool::TShapeShapeMap shape2ShapeMap;
1054 TAssocTool::InitVertexAssociation( _sourceHypo, shape2ShapeMap );
1055 if ( !TAssocTool::FindSubShapeAssociation( tgtFace, tgtMesh, srcShape, srcMesh,
1057 !shape2ShapeMap.IsBound( tgtFace ))
1059 if ( srcShape.ShapeType() == TopAbs_FACE )
1061 int nbE1 = SMESH_MesherHelper::Count( tgtFace, TopAbs_EDGE, /*ignoreSame=*/true );
1062 int nbE2 = SMESH_MesherHelper::Count( srcShape, TopAbs_EDGE, /*ignoreSame=*/true );
1064 return error(COMPERR_BAD_SHAPE,
1065 SMESH_Comment("Different number of edges in source and target faces: ")
1066 << nbE2 << " and " << nbE1 );
1068 return error(COMPERR_BAD_SHAPE,"Topology of source and target faces seems different" );
1070 TopoDS_Face srcFace = TopoDS::Face( shape2ShapeMap( tgtFace ).Oriented(TopAbs_FORWARD));
1072 // ----------------------------------------------
1073 // Assure that mesh on a source Face is computed
1074 // ----------------------------------------------
1076 SMESH_subMesh* srcSubMesh = srcMesh->GetSubMesh( srcFace );
1077 SMESH_subMesh* tgtSubMesh = tgtMesh->GetSubMesh( tgtFace );
1079 string srcMeshError;
1080 if ( tgtMesh == srcMesh ) {
1081 if ( !TAssocTool::MakeComputed( srcSubMesh ))
1082 srcMeshError = TAssocTool::SourceNotComputedError( srcSubMesh, this );
1085 if ( !srcSubMesh->IsMeshComputed() )
1086 srcMeshError = TAssocTool::SourceNotComputedError();
1088 if ( !srcMeshError.empty() )
1089 return error(COMPERR_BAD_INPUT_MESH, srcMeshError );
1095 // get ordered src and tgt EDGEs
1096 TSideVector srcWires, tgtWires;
1097 bool is1DComputed = false; // if any tgt EDGE is meshed
1098 TError err = getWires( tgtFace, srcFace, tgtMesh, srcMesh,
1099 shape2ShapeMap, srcWires, tgtWires, _src2tgtNodes, is1DComputed );
1100 if ( err && !err->IsOK() )
1101 return error( err );
1107 // try to project from the same face with different location
1108 done = projectPartner( tgtFace, srcFace, tgtWires, srcWires,
1109 shape2ShapeMap, _src2tgtNodes, is1DComputed );
1113 // projection in case if the faces are similar in 2D space
1114 done = projectBy2DSimilarity( tgtFace, srcFace, tgtWires, srcWires,
1115 shape2ShapeMap, _src2tgtNodes, is1DComputed);
1118 SMESH_MesherHelper helper( theMesh );
1119 helper.SetSubShape( tgtFace );
1123 _src2tgtNodes.clear();
1124 // --------------------
1125 // Prepare to mapping
1126 // --------------------
1128 // Check if node projection to a face is needed
1130 SMDS_ElemIteratorPtr faceIt = srcSubMesh->GetSubMeshDS()->GetElements();
1131 int nbFaceNodes = 0;
1132 for ( ; nbFaceNodes < 3 && faceIt->more(); ) {
1133 const SMDS_MeshElement* face = faceIt->next();
1134 SMDS_ElemIteratorPtr nodeIt = face->nodesIterator();
1135 while ( nodeIt->more() ) {
1136 const SMDS_MeshNode* node = static_cast<const SMDS_MeshNode*>( nodeIt->next() );
1137 if ( node->GetPosition()->GetTypeOfPosition() == SMDS_TOP_FACE ) {
1139 uvBox.Add( helper.GetNodeUV( srcFace, node ));
1143 const bool toProjectNodes =
1144 ( nbFaceNodes > 0 && ( uvBox.IsVoid() || uvBox.SquareExtent() < DBL_MIN ));
1146 // Find the corresponding source and target vertex
1147 // and <theReverse> flag needed to call mapper.Apply()
1149 TopoDS_Vertex srcV1, tgtV1;
1150 bool reverse = false;
1152 if ( _sourceHypo->HasVertexAssociation() ) {
1153 srcV1 = _sourceHypo->GetSourceVertex(1);
1154 tgtV1 = _sourceHypo->GetTargetVertex(1);
1156 srcV1 = TopoDS::Vertex( TopExp_Explorer( srcFace, TopAbs_VERTEX ).Current() );
1157 tgtV1 = TopoDS::Vertex( shape2ShapeMap( srcV1, /*isSrc=*/true ));
1159 list< TopoDS_Edge > tgtEdges, srcEdges;
1160 list< int > nbEdgesInWires;
1161 SMESH_Block::GetOrderedEdges( tgtFace, tgtEdges, nbEdgesInWires, tgtV1 );
1162 SMESH_Block::GetOrderedEdges( srcFace, srcEdges, nbEdgesInWires, srcV1 );
1164 if ( nbEdgesInWires.front() > 1 ) // possible to find out orientation
1166 TopoDS_Edge srcE1 = srcEdges.front(), tgtE1 = tgtEdges.front();
1167 TopoDS_Shape srcE1bis = shape2ShapeMap( tgtE1 );
1168 reverse = ( ! srcE1.IsSame( srcE1bis ));
1170 _sourceHypo->HasVertexAssociation() &&
1171 nbEdgesInWires.front() > 2 &&
1172 helper.IsRealSeam( tgtEdges.front() ))
1174 // projection to a face with seam EDGE; pb is that GetOrderedEdges()
1175 // always puts a seam EDGE first (if possible) and as a result
1176 // we can't use only theReverse flag to correctly associate source
1177 // and target faces in the mapper. Thus we select srcV1 so that
1178 // GetOrderedEdges() to return EDGEs in a needed order
1179 list< TopoDS_Edge >::iterator edge = srcEdges.begin();
1180 for ( ; edge != srcEdges.end(); ++edge ) {
1181 if ( srcE1bis.IsSame( *edge )) {
1182 srcV1 = helper.IthVertex( 0, *edge );
1188 else if ( nbEdgesInWires.front() == 1 )
1190 // TODO::Compare orientation of curves in a sole edge
1191 //RETURN_BAD_RESULT("Not implemented case");
1195 RETURN_BAD_RESULT("Bad result from SMESH_Block::GetOrderedEdges()");
1198 // Load pattern from the source face
1199 SMESH_Pattern mapper;
1200 mapper.Load( srcMesh, srcFace, toProjectNodes, srcV1 );
1201 if ( mapper.GetErrorCode() != SMESH_Pattern::ERR_OK )
1202 return error(COMPERR_BAD_INPUT_MESH,"Can't load mesh pattern from the source face");
1204 // --------------------
1205 // Perform 2D mapping
1206 // --------------------
1208 // Compute mesh on a target face
1210 mapper.Apply( tgtFace, tgtV1, reverse );
1211 if ( mapper.GetErrorCode() != SMESH_Pattern::ERR_OK )
1212 return error("Can't apply source mesh pattern to the face");
1216 const bool toCreatePolygons = false, toCreatePolyedrs = false;
1217 mapper.MakeMesh( tgtMesh, toCreatePolygons, toCreatePolyedrs );
1218 if ( mapper.GetErrorCode() != SMESH_Pattern::ERR_OK )
1219 return error("Can't make mesh by source mesh pattern");
1221 // it will remove mesh built by pattern mapper on edges and vertices
1223 MeshCleaner cleaner( tgtSubMesh );
1225 // -------------------------------------------------------------------------
1226 // mapper doesn't take care of nodes already existing on edges and vertices,
1227 // so we must merge nodes created by it with existing ones
1228 // -------------------------------------------------------------------------
1230 SMESH_MeshEditor::TListOfListOfNodes groupsOfNodes;
1232 // Make groups of nodes to merge
1234 // loop on EDGE and VERTEX sub-meshes of a target FACE
1235 SMESH_subMeshIteratorPtr smIt = tgtSubMesh->getDependsOnIterator(/*includeSelf=*/false,
1236 /*complexShapeFirst=*/false);
1237 while ( smIt->more() )
1239 SMESH_subMesh* sm = smIt->next();
1240 SMESHDS_SubMesh* smDS = sm->GetSubMeshDS();
1241 if ( !smDS || smDS->NbNodes() == 0 )
1243 //if ( !is1DComputed && sm->GetSubShape().ShapeType() == TopAbs_EDGE )
1246 if ( helper.IsDegenShape( sm->GetId() ) ) // to merge all nodes on degenerated
1248 if ( sm->GetSubShape().ShapeType() == TopAbs_EDGE )
1250 groupsOfNodes.push_back( list< const SMDS_MeshNode* >() );
1251 SMESH_subMeshIteratorPtr smDegenIt
1252 = sm->getDependsOnIterator(/*includeSelf=*/true,/*complexShapeFirst=*/false);
1253 while ( smDegenIt->more() )
1254 if (( smDS = smDegenIt->next()->GetSubMeshDS() ))
1256 SMDS_NodeIteratorPtr nIt = smDS->GetNodes();
1257 while ( nIt->more() )
1258 groupsOfNodes.back().push_back( nIt->next() );
1261 continue; // do not treat sm of degen VERTEX
1264 // Sort new and old nodes of a submesh separately
1266 bool isSeam = helper.IsRealSeam( sm->GetId() );
1268 enum { NEW_NODES = 0, OLD_NODES };
1269 map< double, const SMDS_MeshNode* > u2nodesMaps[2], u2nodesOnSeam;
1270 map< double, const SMDS_MeshNode* >::iterator u_oldNode, u_newNode, u_newOnSeam, newEnd;
1271 set< const SMDS_MeshNode* > seamNodes;
1273 // mapper changed, no more "mapper puts on a seam edge nodes from 2 edges"
1274 if ( isSeam && ! getBoundaryNodes ( sm, tgtFace, u2nodesOnSeam, seamNodes ))
1275 ;//RETURN_BAD_RESULT("getBoundaryNodes() failed");
1277 SMDS_NodeIteratorPtr nIt = smDS->GetNodes();
1278 while ( nIt->more() )
1280 const SMDS_MeshNode* node = nIt->next();
1281 bool isOld = isOldNode( node );
1283 if ( !isOld && isSeam ) { // new node on a seam edge
1284 if ( seamNodes.count( node ) )
1285 continue; // node is already in the map
1288 // sort nodes on edges by their position
1289 map< double, const SMDS_MeshNode* > & pos2nodes = u2nodesMaps[isOld ? OLD_NODES : NEW_NODES];
1290 switch ( node->GetPosition()->GetTypeOfPosition() )
1292 case SMDS_TOP_VERTEX: {
1293 if ( !is1DComputed && !pos2nodes.empty() )
1294 u2nodesMaps[isOld ? NEW_NODES : OLD_NODES].insert( make_pair( 0, node ));
1296 pos2nodes.insert( make_pair( 0, node ));
1299 case SMDS_TOP_EDGE: {
1300 const SMDS_EdgePosition* pos =
1301 static_cast<const SMDS_EdgePosition*>(node->GetPosition());
1302 pos2nodes.insert( make_pair( pos->GetUParameter(), node ));
1306 RETURN_BAD_RESULT("Wrong node position type: "<<
1307 node->GetPosition()->GetTypeOfPosition());
1310 const bool mergeNewToOld =
1311 ( u2nodesMaps[ NEW_NODES ].size() == u2nodesMaps[ OLD_NODES ].size() );
1312 const bool mergeSeamToNew =
1313 ( u2nodesMaps[ NEW_NODES ].size() == u2nodesOnSeam.size() );
1315 if ( !mergeNewToOld )
1316 if ( u2nodesMaps[ NEW_NODES ].size() > 0 &&
1317 u2nodesMaps[ OLD_NODES ].size() > 0 )
1319 u_oldNode = u2nodesMaps[ OLD_NODES ].begin();
1320 newEnd = u2nodesMaps[ OLD_NODES ].end();
1321 for ( ; u_oldNode != newEnd; ++u_oldNode )
1322 SMESH_Algo::addBadInputElement( u_oldNode->second );
1323 return error( COMPERR_BAD_INPUT_MESH,
1324 SMESH_Comment( "Existing mesh mismatches the projected 2D mesh on " )
1325 << ( sm->GetSubShape().ShapeType() == TopAbs_EDGE ? "edge" : "vertex" )
1326 << " #" << sm->GetId() );
1328 if ( isSeam && !mergeSeamToNew ) {
1329 const TopoDS_Shape& seam = sm->GetSubShape();
1330 if ( u2nodesMaps[ NEW_NODES ].size() > 0 &&
1331 u2nodesOnSeam.size() > 0 &&
1332 seam.ShapeType() == TopAbs_EDGE )
1334 int nbE1 = SMESH_MesherHelper::Count( tgtFace, TopAbs_EDGE, /*ignoreSame=*/true );
1335 int nbE2 = SMESH_MesherHelper::Count( srcFace, TopAbs_EDGE, /*ignoreSame=*/true );
1336 if ( nbE1 != nbE2 ) // 2 EDGEs are mapped to a seam EDGE
1338 // find the 2 EDGEs of srcFace
1339 TopTools_DataMapIteratorOfDataMapOfShapeShape src2tgtIt( shape2ShapeMap._map2to1 );
1340 for ( ; src2tgtIt.More(); src2tgtIt.Next() )
1341 if ( seam.IsSame( src2tgtIt.Value() ))
1342 SMESH_Algo::addBadInputElements
1343 ( srcMesh->GetMeshDS()->MeshElements( src2tgtIt.Key() ));
1344 return error( COMPERR_BAD_INPUT_MESH,
1345 "Different number of nodes on two edges projected to a seam edge" );
1350 // Make groups of nodes to merge
1352 u_oldNode = u2nodesMaps[ OLD_NODES ].begin();
1353 u_newNode = u2nodesMaps[ NEW_NODES ].begin();
1354 newEnd = u2nodesMaps[ NEW_NODES ].end();
1355 u_newOnSeam = u2nodesOnSeam.begin();
1356 if ( mergeNewToOld )
1357 for ( ; u_newNode != newEnd; ++u_newNode, ++u_oldNode )
1359 groupsOfNodes.push_back( list< const SMDS_MeshNode* >() );
1360 groupsOfNodes.back().push_back( u_oldNode->second );
1361 groupsOfNodes.back().push_back( u_newNode->second );
1362 if ( mergeSeamToNew )
1363 groupsOfNodes.back().push_back( (u_newOnSeam++)->second );
1365 else if ( mergeSeamToNew )
1366 for ( ; u_newNode != newEnd; ++u_newNode, ++u_newOnSeam )
1368 groupsOfNodes.push_back( list< const SMDS_MeshNode* >() );
1369 groupsOfNodes.back().push_back( u_newNode->second );
1370 groupsOfNodes.back().push_back( u_newOnSeam->second );
1373 } // loop on EDGE and VERTEX submeshes of a target FACE
1377 SMESH_MeshEditor editor( tgtMesh );
1378 int nbFaceBeforeMerge = tgtSubMesh->GetSubMeshDS()->NbElements();
1379 editor.MergeNodes( groupsOfNodes );
1380 int nbFaceAtferMerge = tgtSubMesh->GetSubMeshDS()->NbElements();
1381 if ( nbFaceBeforeMerge != nbFaceAtferMerge && !helper.HasDegeneratedEdges() )
1382 return error(COMPERR_BAD_INPUT_MESH, "Probably invalid node parameters on geom faces");
1385 // ----------------------------------------------------------------
1386 // The mapper can create distorted faces by placing nodes out of the FACE
1387 // boundary -- fix bad faces by smoothing
1388 // ----------------------------------------------------------------
1390 fixDistortedFaces( helper, tgtWires );
1392 // ----------------------------------------------------------------
1393 // The mapper can't create quadratic elements, so convert if needed
1394 // ----------------------------------------------------------------
1396 faceIt = srcSubMesh->GetSubMeshDS()->GetElements();
1397 bool srcIsQuad = faceIt->next()->IsQuadratic();
1398 faceIt = tgtSubMesh->GetSubMeshDS()->GetElements();
1399 bool tgtIsQuad = faceIt->next()->IsQuadratic();
1400 if ( srcIsQuad && !tgtIsQuad )
1402 TIDSortedElemSet tgtFaces;
1403 faceIt = tgtSubMesh->GetSubMeshDS()->GetElements();
1404 while ( faceIt->more() )
1405 tgtFaces.insert( tgtFaces.end(), faceIt->next() );
1407 editor.ConvertToQuadratic(/*theForce3d=*/false, tgtFaces, false);
1410 cleaner.Release(); // not to remove mesh
1412 } // end of projection using Pattern mapping
1415 // ---------------------------
1416 // Check elements orientation
1417 // ---------------------------
1419 TopoDS_Face face = TopoDS::Face( theShape );
1420 if ( !theMesh.IsMainShape( tgtFace ))
1422 // find the main shape
1423 TopoDS_Shape mainShape = meshDS->ShapeToMesh();
1424 switch ( mainShape.ShapeType() ) {
1426 case TopAbs_SOLID: break;
1428 TopTools_ListIteratorOfListOfShape ancestIt = theMesh.GetAncestors( face );
1429 for ( ; ancestIt.More(); ancestIt.Next() ) {
1430 TopAbs_ShapeEnum type = ancestIt.Value().ShapeType();
1431 if ( type == TopAbs_SOLID ) {
1432 mainShape = ancestIt.Value();
1434 } else if ( type == TopAbs_SHELL ) {
1435 mainShape = ancestIt.Value();
1439 // find tgtFace in the main solid or shell to know it's true orientation.
1440 TopExp_Explorer exp( mainShape, TopAbs_FACE );
1441 for ( ; exp.More(); exp.Next() ) {
1442 if ( tgtFace.IsSame( exp.Current() )) {
1443 face = TopoDS::Face( exp.Current() );
1449 if ( helper.IsReversedSubMesh( face ))
1451 SMESH_MeshEditor editor( tgtMesh );
1452 SMDS_ElemIteratorPtr eIt = meshDS->MeshElements( face )->GetElements();
1453 while ( eIt->more() ) {
1454 const SMDS_MeshElement* e = eIt->next();
1455 if ( e->GetType() == SMDSAbs_Face && !editor.Reorient( e ))
1456 RETURN_BAD_RESULT("Pb of SMESH_MeshEditor::Reorient()");
1464 //=======================================================================
1465 //function : Evaluate
1467 //=======================================================================
1469 bool StdMeshers_Projection_2D::Evaluate(SMESH_Mesh& theMesh,
1470 const TopoDS_Shape& theShape,
1471 MapShapeNbElems& aResMap)
1476 SMESH_Mesh * srcMesh = _sourceHypo->GetSourceMesh();
1477 SMESH_Mesh * tgtMesh = & theMesh;
1481 // ---------------------------
1482 // Make sub-shapes association
1483 // ---------------------------
1485 TopoDS_Face tgtFace = TopoDS::Face( theShape.Oriented(TopAbs_FORWARD));
1486 TopoDS_Shape srcShape = _sourceHypo->GetSourceFace().Oriented(TopAbs_FORWARD);
1488 TAssocTool::TShapeShapeMap shape2ShapeMap;
1489 TAssocTool::InitVertexAssociation( _sourceHypo, shape2ShapeMap );
1490 if ( !TAssocTool::FindSubShapeAssociation( tgtFace, tgtMesh, srcShape, srcMesh,
1492 !shape2ShapeMap.IsBound( tgtFace ))
1493 return error(COMPERR_BAD_SHAPE,"Topology of source and target faces seems different" );
1495 TopoDS_Face srcFace = TopoDS::Face( shape2ShapeMap( tgtFace ).Oriented(TopAbs_FORWARD));
1497 // -------------------------------------------------------
1498 // Assure that mesh on a source Face is computed/evaluated
1499 // -------------------------------------------------------
1501 std::vector<int> aVec;
1503 SMESH_subMesh* srcSubMesh = srcMesh->GetSubMesh( srcFace );
1504 if ( srcSubMesh->IsMeshComputed() )
1506 aVec.resize( SMDSEntity_Last, 0 );
1507 aVec[SMDSEntity_Node] = srcSubMesh->GetSubMeshDS()->NbNodes();
1509 SMDS_ElemIteratorPtr elemIt = srcSubMesh->GetSubMeshDS()->GetElements();
1510 while ( elemIt->more() )
1511 aVec[ elemIt->next()->GetEntityType() ]++;
1515 MapShapeNbElems tmpResMap;
1516 MapShapeNbElems& srcResMap = (srcMesh == tgtMesh) ? aResMap : tmpResMap;
1517 if ( !_gen->Evaluate( *srcMesh, srcShape, srcResMap ))
1518 return error(COMPERR_BAD_INPUT_MESH,"Source mesh not evaluatable");
1519 aVec = srcResMap[ srcSubMesh ];
1521 return error(COMPERR_BAD_INPUT_MESH,"Source mesh is wrongly evaluated");
1524 SMESH_subMesh * sm = theMesh.GetSubMesh(theShape);
1525 aResMap.insert(std::make_pair(sm,aVec));
1531 //=============================================================================
1533 * \brief Sets a default event listener to submesh of the source face
1534 * \param subMesh - submesh where algo is set
1536 * This method is called when a submesh gets HYP_OK algo_state.
1537 * After being set, event listener is notified on each event of a submesh.
1538 * Arranges that CLEAN event is translated from source submesh to
1541 //=============================================================================
1543 void StdMeshers_Projection_2D::SetEventListener(SMESH_subMesh* subMesh)
1545 TAssocTool::SetEventListener( subMesh,
1546 _sourceHypo->GetSourceFace(),
1547 _sourceHypo->GetSourceMesh() );