1 // Copyright (C) 2007-2013 CEA/DEN, EDF R&D, OPEN CASCADE
3 // This library is free software; you can redistribute it and/or
4 // modify it under the terms of the GNU Lesser General Public
5 // License as published by the Free Software Foundation; either
6 // version 2.1 of the License.
8 // This library is distributed in the hope that it will be useful,
9 // but WITHOUT ANY WARRANTY; without even the implied warranty of
10 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 // Lesser General Public License for more details.
13 // You should have received a copy of the GNU Lesser General Public
14 // License along with this library; if not, write to the Free Software
15 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17 // See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
20 // File : StdMeshers_ViscousLayers.cxx
21 // Created : Wed Dec 1 15:15:34 2010
22 // Author : Edward AGAPOV (eap)
24 #include "StdMeshers_ViscousLayers.hxx"
26 #include "SMDS_EdgePosition.hxx"
27 #include "SMDS_FaceOfNodes.hxx"
28 #include "SMDS_FacePosition.hxx"
29 #include "SMDS_MeshNode.hxx"
30 #include "SMDS_SetIterator.hxx"
31 #include "SMESHDS_Group.hxx"
32 #include "SMESHDS_Hypothesis.hxx"
33 #include "SMESH_Algo.hxx"
34 #include "SMESH_ComputeError.hxx"
35 #include "SMESH_ControlsDef.hxx"
36 #include "SMESH_Gen.hxx"
37 #include "SMESH_Group.hxx"
38 #include "SMESH_Mesh.hxx"
39 #include "SMESH_MeshAlgos.hxx"
40 #include "SMESH_MesherHelper.hxx"
41 #include "SMESH_ProxyMesh.hxx"
42 #include "SMESH_subMesh.hxx"
43 #include "SMESH_subMeshEventListener.hxx"
44 #include "StdMeshers_FaceSide.hxx"
46 #include <BRepAdaptor_Curve2d.hxx>
47 #include <BRep_Tool.hxx>
48 #include <Bnd_B2d.hxx>
49 #include <Bnd_B3d.hxx>
51 #include <GCPnts_AbscissaPoint.hxx>
52 #include <Geom2d_Circle.hxx>
53 #include <Geom2d_Line.hxx>
54 #include <Geom2d_TrimmedCurve.hxx>
55 #include <GeomAdaptor_Curve.hxx>
56 #include <Geom_Circle.hxx>
57 #include <Geom_Curve.hxx>
58 #include <Geom_Line.hxx>
59 #include <Geom_TrimmedCurve.hxx>
60 #include <Precision.hxx>
61 #include <Standard_ErrorHandler.hxx>
62 #include <TColStd_Array1OfReal.hxx>
64 #include <TopExp_Explorer.hxx>
65 #include <TopTools_IndexedMapOfShape.hxx>
66 #include <TopTools_MapOfShape.hxx>
68 #include <TopoDS_Edge.hxx>
69 #include <TopoDS_Face.hxx>
70 #include <TopoDS_Vertex.hxx>
84 //================================================================================
89 enum UIndex { U_TGT = 1, U_SRC, LEN_TGT };
92 * \brief SMESH_ProxyMesh computed by _ViscousBuilder for a SOLID.
93 * It is stored in a SMESH_subMesh of the SOLID as SMESH_subMeshEventListenerData
95 struct _MeshOfSolid : public SMESH_ProxyMesh,
96 public SMESH_subMeshEventListenerData
100 _MeshOfSolid( SMESH_Mesh* mesh)
101 :SMESH_subMeshEventListenerData( /*isDeletable=*/true),_n2nMapComputed(false)
103 SMESH_ProxyMesh::setMesh( *mesh );
106 // returns submesh for a geom face
107 SMESH_ProxyMesh::SubMesh* getFaceSubM(const TopoDS_Face& F, bool create=false)
109 TGeomID i = SMESH_ProxyMesh::shapeIndex(F);
110 return create ? SMESH_ProxyMesh::getProxySubMesh(i) : findProxySubMesh(i);
112 void setNode2Node(const SMDS_MeshNode* srcNode,
113 const SMDS_MeshNode* proxyNode,
114 const SMESH_ProxyMesh::SubMesh* subMesh)
116 SMESH_ProxyMesh::setNode2Node( srcNode,proxyNode,subMesh);
119 //--------------------------------------------------------------------------------
121 * \brief Listener of events of 3D sub-meshes computed with viscous layers.
122 * It is used to clear an inferior dim sub-meshes modified by viscous layers
124 class _ShrinkShapeListener : SMESH_subMeshEventListener
126 _ShrinkShapeListener()
127 : SMESH_subMeshEventListener(/*isDeletable=*/false,
128 "StdMeshers_ViscousLayers::_ShrinkShapeListener") {}
130 static SMESH_subMeshEventListener* Get() { static _ShrinkShapeListener l; return &l; }
131 virtual void ProcessEvent(const int event,
133 SMESH_subMesh* solidSM,
134 SMESH_subMeshEventListenerData* data,
135 const SMESH_Hypothesis* hyp)
137 if ( SMESH_subMesh::COMPUTE_EVENT == eventType && solidSM->IsEmpty() && data )
139 SMESH_subMeshEventListener::ProcessEvent(event,eventType,solidSM,data,hyp);
143 //--------------------------------------------------------------------------------
145 * \brief Listener of events of 3D sub-meshes computed with viscous layers.
146 * It is used to store data computed by _ViscousBuilder for a sub-mesh and to
147 * delete the data as soon as it has been used
149 class _ViscousListener : SMESH_subMeshEventListener
152 SMESH_subMeshEventListener(/*isDeletable=*/false,
153 "StdMeshers_ViscousLayers::_ViscousListener") {}
154 static SMESH_subMeshEventListener* Get() { static _ViscousListener l; return &l; }
156 virtual void ProcessEvent(const int event,
158 SMESH_subMesh* subMesh,
159 SMESH_subMeshEventListenerData* data,
160 const SMESH_Hypothesis* hyp)
162 if ( SMESH_subMesh::COMPUTE_EVENT == eventType )
164 // delete SMESH_ProxyMesh containing temporary faces
165 subMesh->DeleteEventListener( this );
168 // Finds or creates proxy mesh of the solid
169 static _MeshOfSolid* GetSolidMesh(SMESH_Mesh* mesh,
170 const TopoDS_Shape& solid,
173 if ( !mesh ) return 0;
174 SMESH_subMesh* sm = mesh->GetSubMesh(solid);
175 _MeshOfSolid* data = (_MeshOfSolid*) sm->GetEventListenerData( Get() );
176 if ( !data && toCreate )
178 data = new _MeshOfSolid(mesh);
179 data->mySubMeshes.push_back( sm ); // to find SOLID by _MeshOfSolid
180 sm->SetEventListener( Get(), data, sm );
184 // Removes proxy mesh of the solid
185 static void RemoveSolidMesh(SMESH_Mesh* mesh, const TopoDS_Shape& solid)
187 mesh->GetSubMesh(solid)->DeleteEventListener( _ViscousListener::Get() );
191 //================================================================================
193 * \brief sets a sub-mesh event listener to clear sub-meshes of sub-shapes of
194 * the main shape when sub-mesh of the main shape is cleared,
195 * for example to clear sub-meshes of FACEs when sub-mesh of a SOLID
198 //================================================================================
200 void ToClearSubWithMain( SMESH_subMesh* sub, const TopoDS_Shape& main)
202 SMESH_subMesh* mainSM = sub->GetFather()->GetSubMesh( main );
203 SMESH_subMeshEventListenerData* data =
204 mainSM->GetEventListenerData( _ShrinkShapeListener::Get());
207 if ( find( data->mySubMeshes.begin(), data->mySubMeshes.end(), sub ) ==
208 data->mySubMeshes.end())
209 data->mySubMeshes.push_back( sub );
213 data = SMESH_subMeshEventListenerData::MakeData( /*dependent=*/sub );
214 sub->SetEventListener( _ShrinkShapeListener::Get(), data, /*whereToListenTo=*/mainSM );
217 //--------------------------------------------------------------------------------
219 * \brief Simplex (triangle or tetrahedron) based on 1 (tria) or 2 (tet) nodes of
220 * _LayerEdge and 2 nodes of the mesh surface beening smoothed.
221 * The class is used to check validity of face or volumes around a smoothed node;
222 * it stores only 2 nodes as the other nodes are stored by _LayerEdge.
226 const SMDS_MeshNode *_nPrev, *_nNext; // nodes on a smoothed mesh surface
227 const SMDS_MeshNode *_nOpp; // in 2D case, a node opposite to a smoothed node in QUAD
228 _Simplex(const SMDS_MeshNode* nPrev=0,
229 const SMDS_MeshNode* nNext=0,
230 const SMDS_MeshNode* nOpp=0)
231 : _nPrev(nPrev), _nNext(nNext), _nOpp(nOpp) {}
232 bool IsForward(const SMDS_MeshNode* nSrc, const gp_XYZ* pntTgt) const
234 const double M[3][3] =
235 {{ _nNext->X() - nSrc->X(), _nNext->Y() - nSrc->Y(), _nNext->Z() - nSrc->Z() },
236 { pntTgt->X() - nSrc->X(), pntTgt->Y() - nSrc->Y(), pntTgt->Z() - nSrc->Z() },
237 { _nPrev->X() - nSrc->X(), _nPrev->Y() - nSrc->Y(), _nPrev->Z() - nSrc->Z() }};
238 double determinant = ( + M[0][0]*M[1][1]*M[2][2]
239 + M[0][1]*M[1][2]*M[2][0]
240 + M[0][2]*M[1][0]*M[2][1]
241 - M[0][0]*M[1][2]*M[2][1]
242 - M[0][1]*M[1][0]*M[2][2]
243 - M[0][2]*M[1][1]*M[2][0]);
244 return determinant > 1e-100;
246 bool IsForward(const gp_XY& tgtUV,
247 const SMDS_MeshNode* smoothedNode,
248 const TopoDS_Face& face,
249 SMESH_MesherHelper& helper,
250 const double refSign) const
252 gp_XY prevUV = helper.GetNodeUV( face, _nPrev, smoothedNode );
253 gp_XY nextUV = helper.GetNodeUV( face, _nNext, smoothedNode );
254 gp_Vec2d v1( tgtUV, prevUV ), v2( tgtUV, nextUV );
256 return d*refSign > 1e-100;
258 bool IsNeighbour(const _Simplex& other) const
260 return _nPrev == other._nNext || _nNext == other._nPrev;
263 //--------------------------------------------------------------------------------
265 * Structure used to take into account surface curvature while smoothing
270 double _k; // factor to correct node smoothed position
271 double _h2lenRatio; // avgNormProj / (2*avgDist)
273 static _Curvature* New( double avgNormProj, double avgDist )
276 if ( fabs( avgNormProj / avgDist ) > 1./200 )
279 c->_r = avgDist * avgDist / avgNormProj;
280 c->_k = avgDist * avgDist / c->_r / c->_r;
281 c->_k *= ( c->_r < 0 ? 1/1.1 : 1.1 ); // not to be too restrictive
282 c->_h2lenRatio = avgNormProj / ( avgDist + avgDist );
286 double lenDelta(double len) const { return _k * ( _r + len ); }
287 double lenDeltaByDist(double dist) const { return dist * _h2lenRatio; }
290 //--------------------------------------------------------------------------------
292 * Structure used to smooth a _LayerEdge (master) based on an EDGE.
296 // target nodes of 2 neighbour _LayerEdge's based on the same EDGE
297 const SMDS_MeshNode* _nodes[2];
298 // vectors from source nodes of 2 _LayerEdge's to the source node of master _LayerEdge
300 double _wgt[2]; // weights of _nodes
301 _LayerEdge* _edges[2];
303 // normal to plane passing through _LayerEdge._normal and tangent of EDGE
306 _2NearEdges() { _nodes[0]=_nodes[1]=0; _plnNorm = 0; }
308 std::swap( _nodes[0], _nodes[1] );
309 std::swap( _wgt[0], _wgt[1] );
312 //--------------------------------------------------------------------------------
314 * \brief Edge normal to surface, connecting a node on solid surface (_nodes[0])
315 * and a node of the most internal layer (_nodes.back())
319 vector< const SMDS_MeshNode*> _nodes;
321 gp_XYZ _normal; // to solid surface
322 vector<gp_XYZ> _pos; // points computed during inflation
323 double _len; // length achived with the last step
324 double _cosin; // of angle (_normal ^ surface)
325 double _lenFactor; // to compute _len taking _cosin into account
327 // face or edge w/o layer along or near which _LayerEdge is inflated
329 // simplices connected to the source node (_nodes[0]);
330 // used for smoothing and quality check of _LayerEdge's based on the FACE
331 vector<_Simplex> _simplices;
332 // data for smoothing of _LayerEdge's based on the EDGE
333 _2NearEdges* _2neibors;
335 _Curvature* _curvature;
336 // TODO:: detele _Curvature, _plnNorm
338 void SetNewLength( double len, SMESH_MesherHelper& helper );
339 bool SetNewLength2d( Handle(Geom_Surface)& surface,
340 const TopoDS_Face& F,
341 SMESH_MesherHelper& helper );
342 void SetDataByNeighbors( const SMDS_MeshNode* n1,
343 const SMDS_MeshNode* n2,
344 SMESH_MesherHelper& helper);
345 void InvalidateStep( int curStep );
346 bool Smooth(int& badNb);
347 bool SmoothOnEdge(Handle(Geom_Surface)& surface,
348 const TopoDS_Face& F,
349 SMESH_MesherHelper& helper);
350 bool FindIntersection( SMESH_ElementSearcher& searcher,
352 const double& epsilon,
353 const SMDS_MeshElement** face = 0);
354 bool SegTriaInter( const gp_Ax1& lastSegment,
355 const SMDS_MeshNode* n0,
356 const SMDS_MeshNode* n1,
357 const SMDS_MeshNode* n2,
359 const double& epsilon) const;
360 gp_Ax1 LastSegment(double& segLen) const;
361 bool IsOnEdge() const { return _2neibors; }
362 void Copy( _LayerEdge& other, SMESH_MesherHelper& helper );
363 void SetCosin( double cosin );
367 bool operator () (const _LayerEdge* e1, const _LayerEdge* e2) const
369 const bool cmpNodes = ( e1 && e2 && e1->_nodes.size() && e2->_nodes.size() );
370 return cmpNodes ? ( e1->_nodes[0]->GetID() < e2->_nodes[0]->GetID()) : ( e1 < e2 );
373 //--------------------------------------------------------------------------------
375 typedef map< const SMDS_MeshNode*, _LayerEdge*, TIDCompare > TNode2Edge;
377 //--------------------------------------------------------------------------------
379 * \brief Data of a SOLID
384 const StdMeshers_ViscousLayers* _hyp;
385 _MeshOfSolid* _proxyMesh;
386 set<TGeomID> _reversedFaceIds;
388 double _stepSize, _stepSizeCoeff;
389 const SMDS_MeshNode* _stepSizeNodes[2];
392 // edges of _n2eMap. We keep same data in two containers because
393 // iteration over the map is 5 time longer than over the vector
394 vector< _LayerEdge* > _edges;
396 // key: an id of shape (EDGE or VERTEX) shared by a FACE with
397 // layers and a FACE w/o layers
398 // value: the shape (FACE or EDGE) to shrink mesh on.
399 // _LayerEdge's basing on nodes on key shape are inflated along the value shape
400 map< TGeomID, TopoDS_Shape > _shrinkShape2Shape;
402 // FACE's WOL, srink on which is forbiden due to algo on the adjacent SOLID
403 set< TGeomID > _noShrinkFaces;
405 // <EDGE to smooth on> to <it's curve>
406 map< TGeomID,Handle(Geom_Curve)> _edge2curve;
408 // end indices in _edges of _LayerEdge on one shape to smooth
409 vector< int > _endEdgeToSmooth;
411 double _epsilon; // precision for SegTriaInter()
413 int _index; // for debug
415 _SolidData(const TopoDS_Shape& s=TopoDS_Shape(),
416 const StdMeshers_ViscousLayers* h=0,
417 _MeshOfSolid* m=0) :_solid(s), _hyp(h), _proxyMesh(m) {}
420 Handle(Geom_Curve) CurveForSmooth( const TopoDS_Edge& E,
423 Handle(Geom_Surface)& surface,
424 const TopoDS_Face& F,
425 SMESH_MesherHelper& helper);
427 //--------------------------------------------------------------------------------
429 * \brief Data of node on a shrinked FACE
433 const SMDS_MeshNode* _node;
434 //vector<const SMDS_MeshNode*> _nodesAround;
435 vector<_Simplex> _simplices; // for quality check
437 enum SmoothType { LAPLACIAN, CENTROIDAL, ANGULAR };
439 bool Smooth(int& badNb,
440 Handle(Geom_Surface)& surface,
441 SMESH_MesherHelper& helper,
442 const double refSign,
446 gp_XY computeAngularPos(vector<gp_XY>& uv,
447 const gp_XY& uvToFix,
448 const double refSign );
450 //--------------------------------------------------------------------------------
452 * \brief Builder of viscous layers
454 class _ViscousBuilder
459 SMESH_ComputeErrorPtr Compute(SMESH_Mesh& mesh,
460 const TopoDS_Shape& shape);
462 // restore event listeners used to clear an inferior dim sub-mesh modified by viscous layers
463 void RestoreListeners();
465 // computes SMESH_ProxyMesh::SubMesh::_n2n;
466 bool MakeN2NMap( _MeshOfSolid* pm );
470 bool findSolidsWithLayers();
471 bool findFacesWithLayers();
472 bool makeLayer(_SolidData& data);
473 bool setEdgeData(_LayerEdge& edge, const set<TGeomID>& subIds,
474 SMESH_MesherHelper& helper, _SolidData& data);
475 bool findNeiborsOnEdge(const _LayerEdge* edge,
476 const SMDS_MeshNode*& n1,
477 const SMDS_MeshNode*& n2,
479 void getSimplices( const SMDS_MeshNode* node, vector<_Simplex>& simplices,
480 const set<TGeomID>& ingnoreShapes,
481 const _SolidData* dataToCheckOri = 0,
482 const bool toSort = false);
483 bool sortEdges( _SolidData& data,
484 vector< vector<_LayerEdge*> >& edgesByGeom);
485 void limitStepSize( _SolidData& data,
486 const SMDS_MeshElement* face,
488 void limitStepSize( _SolidData& data, const double minSize);
489 bool inflate(_SolidData& data);
490 bool smoothAndCheck(_SolidData& data, const int nbSteps, double & distToIntersection);
491 bool smoothAnalyticEdge( _SolidData& data,
494 Handle(Geom_Surface)& surface,
495 const TopoDS_Face& F,
496 SMESH_MesherHelper& helper);
497 bool updateNormals( _SolidData& data, SMESH_MesherHelper& helper );
498 bool refine(_SolidData& data);
500 bool prepareEdgeToShrink( _LayerEdge& edge, const TopoDS_Face& F,
501 SMESH_MesherHelper& helper,
502 const SMESHDS_SubMesh* faceSubMesh );
503 void fixBadFaces(const TopoDS_Face& F, SMESH_MesherHelper& helper);
504 bool addBoundaryElements();
506 bool error( const string& text, int solidID=-1 );
507 SMESHDS_Mesh* getMeshDS() { return _mesh->GetMeshDS(); }
510 void makeGroupOfLE();
513 SMESH_ComputeErrorPtr _error;
515 vector< _SolidData > _sdVec;
516 set<TGeomID> _ignoreShapeIds;
519 //--------------------------------------------------------------------------------
521 * \brief Shrinker of nodes on the EDGE
525 vector<double> _initU;
526 vector<double> _normPar;
527 vector<const SMDS_MeshNode*> _nodes;
528 const _LayerEdge* _edges[2];
531 void AddEdge( const _LayerEdge* e, SMESH_MesherHelper& helper );
532 void Compute(bool set3D, SMESH_MesherHelper& helper);
533 void RestoreParams();
534 void SwapSrcTgtNodes(SMESHDS_Mesh* mesh);
536 //--------------------------------------------------------------------------------
538 * \brief Class of temporary mesh face.
539 * We can't use SMDS_FaceOfNodes since it's impossible to set it's ID which is
540 * needed because SMESH_ElementSearcher internaly uses set of elements sorted by ID
542 struct TmpMeshFace : public SMDS_MeshElement
544 vector<const SMDS_MeshNode* > _nn;
545 TmpMeshFace( const vector<const SMDS_MeshNode*>& nodes, int id):
546 SMDS_MeshElement(id), _nn(nodes) {}
547 virtual const SMDS_MeshNode* GetNode(const int ind) const { return _nn[ind]; }
548 virtual SMDSAbs_ElementType GetType() const { return SMDSAbs_Face; }
549 virtual vtkIdType GetVtkType() const { return -1; }
550 virtual SMDSAbs_EntityType GetEntityType() const { return SMDSEntity_Last; }
551 virtual SMDSAbs_GeometryType GetGeomType() const { return SMDSGeom_TRIANGLE; }
552 virtual SMDS_ElemIteratorPtr elementsIterator(SMDSAbs_ElementType type) const
553 { return SMDS_ElemIteratorPtr( new SMDS_NodeVectorElemIterator( _nn.begin(), _nn.end()));}
555 //--------------------------------------------------------------------------------
557 * \brief Class of temporary mesh face storing _LayerEdge it's based on
559 struct TmpMeshFaceOnEdge : public TmpMeshFace
561 _LayerEdge *_le1, *_le2;
562 TmpMeshFaceOnEdge( _LayerEdge* le1, _LayerEdge* le2, int ID ):
563 TmpMeshFace( vector<const SMDS_MeshNode*>(4), ID ), _le1(le1), _le2(le2)
565 _nn[0]=_le1->_nodes[0];
566 _nn[1]=_le1->_nodes.back();
567 _nn[2]=_le2->_nodes.back();
568 _nn[3]=_le2->_nodes[0];
571 } // namespace VISCOUS_3D
573 //================================================================================
574 // StdMeshers_ViscousLayers hypothesis
576 StdMeshers_ViscousLayers::StdMeshers_ViscousLayers(int hypId, int studyId, SMESH_Gen* gen)
577 :SMESH_Hypothesis(hypId, studyId, gen),
578 _isToIgnoreShapes(18), _nbLayers(1), _thickness(1), _stretchFactor(1)
580 _name = StdMeshers_ViscousLayers::GetHypType();
581 _param_algo_dim = -3; // auxiliary hyp used by 3D algos
582 } // --------------------------------------------------------------------------------
583 void StdMeshers_ViscousLayers::SetBndShapes(const std::vector<int>& faceIds, bool toIgnore)
585 if ( faceIds != _shapeIds )
586 _shapeIds = faceIds, NotifySubMeshesHypothesisModification();
587 if ( _isToIgnoreShapes != toIgnore )
588 _isToIgnoreShapes = toIgnore, NotifySubMeshesHypothesisModification();
589 } // --------------------------------------------------------------------------------
590 void StdMeshers_ViscousLayers::SetTotalThickness(double thickness)
592 if ( thickness != _thickness )
593 _thickness = thickness, NotifySubMeshesHypothesisModification();
594 } // --------------------------------------------------------------------------------
595 void StdMeshers_ViscousLayers::SetNumberLayers(int nb)
597 if ( _nbLayers != nb )
598 _nbLayers = nb, NotifySubMeshesHypothesisModification();
599 } // --------------------------------------------------------------------------------
600 void StdMeshers_ViscousLayers::SetStretchFactor(double factor)
602 if ( _stretchFactor != factor )
603 _stretchFactor = factor, NotifySubMeshesHypothesisModification();
604 } // --------------------------------------------------------------------------------
606 StdMeshers_ViscousLayers::Compute(SMESH_Mesh& theMesh,
607 const TopoDS_Shape& theShape,
608 const bool toMakeN2NMap) const
610 using namespace VISCOUS_3D;
611 _ViscousBuilder bulder;
612 SMESH_ComputeErrorPtr err = bulder.Compute( theMesh, theShape );
613 if ( err && !err->IsOK() )
614 return SMESH_ProxyMesh::Ptr();
616 vector<SMESH_ProxyMesh::Ptr> components;
617 TopExp_Explorer exp( theShape, TopAbs_SOLID );
618 for ( ; exp.More(); exp.Next() )
620 if ( _MeshOfSolid* pm =
621 _ViscousListener::GetSolidMesh( &theMesh, exp.Current(), /*toCreate=*/false))
623 if ( toMakeN2NMap && !pm->_n2nMapComputed )
624 if ( !bulder.MakeN2NMap( pm ))
625 return SMESH_ProxyMesh::Ptr();
626 components.push_back( SMESH_ProxyMesh::Ptr( pm ));
627 pm->myIsDeletable = false; // it will de deleted by boost::shared_ptr
629 _ViscousListener::RemoveSolidMesh ( &theMesh, exp.Current() );
631 switch ( components.size() )
635 case 1: return components[0];
637 default: return SMESH_ProxyMesh::Ptr( new SMESH_ProxyMesh( components ));
639 return SMESH_ProxyMesh::Ptr();
640 } // --------------------------------------------------------------------------------
641 std::ostream & StdMeshers_ViscousLayers::SaveTo(std::ostream & save)
643 save << " " << _nbLayers
645 << " " << _stretchFactor
646 << " " << _shapeIds.size();
647 for ( unsigned i = 0; i < _shapeIds.size(); ++i )
648 save << " " << _shapeIds[i];
649 save << " " << !_isToIgnoreShapes; // negate to keep the behavior in old studies.
651 } // --------------------------------------------------------------------------------
652 std::istream & StdMeshers_ViscousLayers::LoadFrom(std::istream & load)
654 int nbFaces, faceID, shapeToTreat;
655 load >> _nbLayers >> _thickness >> _stretchFactor >> nbFaces;
656 while ( _shapeIds.size() < nbFaces && load >> faceID )
657 _shapeIds.push_back( faceID );
658 if ( load >> shapeToTreat )
659 _isToIgnoreShapes = !shapeToTreat;
661 _isToIgnoreShapes = true; // old behavior
663 } // --------------------------------------------------------------------------------
664 bool StdMeshers_ViscousLayers::SetParametersByMesh(const SMESH_Mesh* theMesh,
665 const TopoDS_Shape& theShape)
670 // END StdMeshers_ViscousLayers hypothesis
671 //================================================================================
675 gp_XYZ getEdgeDir( const TopoDS_Edge& E, const TopoDS_Vertex& fromV )
679 Handle(Geom_Curve) c = BRep_Tool::Curve( E, f, l );
680 gp_Pnt p = BRep_Tool::Pnt( fromV );
681 double distF = p.SquareDistance( c->Value( f ));
682 double distL = p.SquareDistance( c->Value( l ));
683 c->D1(( distF < distL ? f : l), p, dir );
684 if ( distL < distF ) dir.Reverse();
687 //--------------------------------------------------------------------------------
688 gp_XYZ getEdgeDir( const TopoDS_Edge& E, const SMDS_MeshNode* atNode,
689 SMESH_MesherHelper& helper)
692 double f,l; gp_Pnt p;
693 Handle(Geom_Curve) c = BRep_Tool::Curve( E, f, l );
694 double u = helper.GetNodeU( E, atNode );
698 //--------------------------------------------------------------------------------
699 gp_XYZ getFaceDir( const TopoDS_Face& F, const TopoDS_Edge& fromE,
700 const SMDS_MeshNode* node, SMESH_MesherHelper& helper, bool& ok)
702 gp_XY uv = helper.GetNodeUV( F, node, 0, &ok );
703 Handle(Geom_Surface) surface = BRep_Tool::Surface( F );
704 gp_Pnt p; gp_Vec du, dv, norm;
705 surface->D1( uv.X(),uv.Y(), p, du,dv );
709 Handle(Geom_Curve) c = BRep_Tool::Curve( fromE, f, l );
710 double u = helper.GetNodeU( fromE, node, 0, &ok );
712 TopAbs_Orientation o = helper.GetSubShapeOri( F.Oriented(TopAbs_FORWARD), fromE);
713 if ( o == TopAbs_REVERSED )
716 gp_Vec dir = norm ^ du;
718 if ( node->GetPosition()->GetTypeOfPosition() == SMDS_TOP_VERTEX &&
719 helper.IsClosedEdge( fromE ))
721 if ( fabs(u-f) < fabs(u-l )) c->D1( l, p, dv );
722 else c->D1( f, p, dv );
723 if ( o == TopAbs_REVERSED )
725 gp_Vec dir2 = norm ^ dv;
726 dir = dir.Normalized() + dir2.Normalized();
730 //--------------------------------------------------------------------------------
731 gp_XYZ getFaceDir( const TopoDS_Face& F, const TopoDS_Vertex& fromV,
732 const SMDS_MeshNode* node, SMESH_MesherHelper& helper,
733 bool& ok, double* cosin=0)
735 double f,l; TopLoc_Location loc;
736 vector< TopoDS_Edge > edges; // sharing a vertex
737 PShapeIteratorPtr eIt = helper.GetAncestors( fromV, *helper.GetMesh(), TopAbs_EDGE);
740 const TopoDS_Edge* e = static_cast<const TopoDS_Edge*>( eIt->next() );
741 if ( helper.IsSubShape( *e, F ) && !BRep_Tool::Curve( *e, loc,f,l).IsNull() )
742 edges.push_back( *e );
745 if ( !( ok = ( edges.size() > 0 ))) return dir;
746 // get average dir of edges going fromV
748 //if ( edges.size() > 1 )
749 for ( unsigned i = 0; i < edges.size(); ++i )
751 edgeDir = getEdgeDir( edges[i], fromV );
752 double size2 = edgeDir.SquareModulus();
753 if ( size2 > numeric_limits<double>::min() )
754 edgeDir /= sqrt( size2 );
759 gp_XYZ fromEdgeDir = getFaceDir( F, edges[0], node, helper, ok );
760 if ( edges.size() == 1 )
762 else if ( dir.SquareModulus() < 0.1 ) // ~< 20 degrees
763 dir = fromEdgeDir + getFaceDir( F, edges[1], node, helper, ok );
764 else if ( dir * fromEdgeDir < 0 )
768 //dir /= edges.size();
770 double angle = gp_Vec( edgeDir ).Angle( dir );
771 *cosin = cos( angle );
776 //================================================================================
778 * \brief Returns true if a FACE is bound by a concave EDGE
780 //================================================================================
782 bool isConcave( const TopoDS_Face& F, SMESH_MesherHelper& helper )
784 // if ( helper.Count( F, TopAbs_WIRE, /*useMap=*/false) > 1 )
788 TopExp_Explorer eExp( F.Oriented( TopAbs_FORWARD ), TopAbs_EDGE );
789 for ( ; eExp.More(); eExp.Next() )
791 const TopoDS_Edge& E = TopoDS::Edge( eExp.Current() );
792 if ( SMESH_Algo::isDegenerated( E )) continue;
793 // check if 2D curve is concave
794 BRepAdaptor_Curve2d curve( E, F );
795 const int nbIntervals = curve.NbIntervals( GeomAbs_C2 );
796 TColStd_Array1OfReal intervals(1, nbIntervals + 1 );
797 curve.Intervals( intervals, GeomAbs_C2 );
798 bool isConvex = true;
799 for ( int i = 1; i <= nbIntervals && isConvex; ++i )
801 double u1 = intervals( i );
802 double u2 = intervals( i+1 );
803 curve.D2( 0.5*( u1+u2 ), p, drv1, drv2 );
804 double cross = drv2 * drv1; //drv2 ^ drv1;
805 if ( E.Orientation() == TopAbs_REVERSED )
807 isConvex = ( cross > -1e-9 );
809 // check if concavity is strong enough to care about it
810 //const double maxAngle = 5 * Standard_PI180;
813 //cout << "Concave FACE " << helper.GetMeshDS()->ShapeToIndex( F ) << endl;
815 // map< double, const SMDS_MeshNode* > u2nodes;
816 // if ( !SMESH_Algo::GetSortedNodesOnEdge( helper.GetMeshDS(), E,
817 // /*ignoreMedium=*/true, u2nodes))
819 // map< double, const SMDS_MeshNode* >::iterator u2n = u2nodes.begin();
820 // gp_Pnt2d uvPrev = helper.GetNodeUV( F, u2n->second );
821 // double uPrev = u2n->first;
822 // for ( ++u2n; u2n != u2nodes.end(); ++u2n )
824 // gp_Pnt2d uv = helper.GetNodeUV( F, u2n->second );
825 // gp_Vec2d segmentDir( uvPrev, uv );
826 // curve.D1( uPrev, p, drv1 );
828 // if ( fabs( segmentDir.Angle( drv1 )) > maxAngle )
833 // uPrev = u2n->first;
837 // check angles at VERTEXes
839 TSideVector wires = StdMeshers_FaceSide::GetFaceWires( F, *helper.GetMesh(), 0, error );
840 for ( size_t iW = 0; iW < wires.size(); ++iW )
842 const int nbEdges = wires[iW]->NbEdges();
843 if ( nbEdges < 2 && SMESH_Algo::isDegenerated( wires[iW]->Edge(0)))
845 for ( int iE1 = 0; iE1 < nbEdges; ++iE1 )
847 if ( SMESH_Algo::isDegenerated( wires[iW]->Edge( iE1 ))) continue;
848 int iE2 = ( iE1 + 1 ) % nbEdges;
849 while ( SMESH_Algo::isDegenerated( wires[iW]->Edge( iE2 )))
850 iE2 = ( iE2 + 1 ) % nbEdges;
851 double angle = helper.GetAngle( wires[iW]->Edge( iE1 ),
852 wires[iW]->Edge( iE2 ), F );
853 if ( angle < -5. * M_PI / 180. )
859 //--------------------------------------------------------------------------------
860 // DEBUG. Dump intermediate node positions into a python script
865 const char* fname = "/tmp/viscous.py";
866 cout << "execfile('"<<fname<<"')"<<endl;
867 py = new ofstream(fname);
868 *py << "import SMESH" << endl
869 << "from salome.smesh import smeshBuilder" << endl
870 << "smesh = smeshBuilder.New(salome.myStudy)" << endl
871 << "meshSO = smesh.GetCurrentStudy().FindObjectID('0:1:2:3')" << endl
872 << "mesh = smesh.Mesh( meshSO.GetObject() )"<<endl;
876 *py << "mesh.MakeGroup('Viscous Prisms',VOLUME,FT_ElemGeomType,'=',Geom_PENTA)"<<endl;
879 ~PyDump() { Finish(); }
881 #define dumpFunction(f) { _dumpFunction(f, __LINE__);}
882 #define dumpMove(n) { _dumpMove(n, __LINE__);}
883 #define dumpCmd(txt) { _dumpCmd(txt, __LINE__);}
884 void _dumpFunction(const string& fun, int ln)
885 { if (py) *py<< "def "<<fun<<"(): # "<< ln <<endl; cout<<fun<<"()"<<endl;}
886 void _dumpMove(const SMDS_MeshNode* n, int ln)
887 { if (py) *py<< " mesh.MoveNode( "<<n->GetID()<< ", "<< n->X()
888 << ", "<<n->Y()<<", "<< n->Z()<< ")\t\t # "<< ln <<endl; }
889 void _dumpCmd(const string& txt, int ln)
890 { if (py) *py<< " "<<txt<<" # "<< ln <<endl; }
891 void dumpFunctionEnd()
892 { if (py) *py<< " return"<< endl; }
893 void dumpChangeNodes( const SMDS_MeshElement* f )
894 { if (py) { *py<< " mesh.ChangeElemNodes( " << f->GetID()<<", [";
895 for ( int i=1; i < f->NbNodes(); ++i ) *py << f->GetNode(i-1)->GetID()<<", ";
896 *py << f->GetNode( f->NbNodes()-1 )->GetID() << " ])"<< endl; }}
898 struct PyDump { void Finish() {} };
899 #define dumpFunction(f) f
902 #define dumpFunctionEnd()
903 #define dumpChangeNodes(f)
907 using namespace VISCOUS_3D;
909 //================================================================================
911 * \brief Constructor of _ViscousBuilder
913 //================================================================================
915 _ViscousBuilder::_ViscousBuilder()
917 _error = SMESH_ComputeError::New(COMPERR_OK);
921 //================================================================================
923 * \brief Stores error description and returns false
925 //================================================================================
927 bool _ViscousBuilder::error(const string& text, int solidId )
929 _error->myName = COMPERR_ALGO_FAILED;
930 _error->myComment = string("Viscous layers builder: ") + text;
933 SMESH_subMesh* sm = _mesh->GetSubMeshContaining( solidId );
934 if ( !sm && !_sdVec.empty() )
935 sm = _mesh->GetSubMeshContaining( _sdVec[0]._index );
936 if ( sm && sm->GetSubShape().ShapeType() == TopAbs_SOLID )
938 SMESH_ComputeErrorPtr& smError = sm->GetComputeError();
939 if ( smError && smError->myAlgo )
940 _error->myAlgo = smError->myAlgo;
944 makeGroupOfLE(); // debug
949 //================================================================================
951 * \brief At study restoration, restore event listeners used to clear an inferior
952 * dim sub-mesh modified by viscous layers
954 //================================================================================
956 void _ViscousBuilder::RestoreListeners()
961 //================================================================================
963 * \brief computes SMESH_ProxyMesh::SubMesh::_n2n
965 //================================================================================
967 bool _ViscousBuilder::MakeN2NMap( _MeshOfSolid* pm )
969 SMESH_subMesh* solidSM = pm->mySubMeshes.front();
970 TopExp_Explorer fExp( solidSM->GetSubShape(), TopAbs_FACE );
971 for ( ; fExp.More(); fExp.Next() )
973 SMESHDS_SubMesh* srcSmDS = pm->GetMeshDS()->MeshElements( fExp.Current() );
974 const SMESH_ProxyMesh::SubMesh* prxSmDS = pm->GetProxySubMesh( fExp.Current() );
976 if ( !srcSmDS || !prxSmDS || !srcSmDS->NbElements() || !prxSmDS->NbElements() )
978 if ( srcSmDS->GetElements()->next() == prxSmDS->GetElements()->next())
981 if ( srcSmDS->NbElements() != prxSmDS->NbElements() )
982 return error( "Different nb elements in a source and a proxy sub-mesh", solidSM->GetId());
984 SMDS_ElemIteratorPtr srcIt = srcSmDS->GetElements();
985 SMDS_ElemIteratorPtr prxIt = prxSmDS->GetElements();
986 while( prxIt->more() )
988 const SMDS_MeshElement* fSrc = srcIt->next();
989 const SMDS_MeshElement* fPrx = prxIt->next();
990 if ( fSrc->NbNodes() != fPrx->NbNodes())
991 return error( "Different elements in a source and a proxy sub-mesh", solidSM->GetId());
992 for ( int i = 0 ; i < fPrx->NbNodes(); ++i )
993 pm->setNode2Node( fSrc->GetNode(i), fPrx->GetNode(i), prxSmDS );
996 pm->_n2nMapComputed = true;
1000 //================================================================================
1002 * \brief Does its job
1004 //================================================================================
1006 SMESH_ComputeErrorPtr _ViscousBuilder::Compute(SMESH_Mesh& theMesh,
1007 const TopoDS_Shape& theShape)
1009 // TODO: set priority of solids during Gen::Compute()
1013 // check if proxy mesh already computed
1014 TopExp_Explorer exp( theShape, TopAbs_SOLID );
1016 return error("No SOLID's in theShape"), _error;
1018 if ( _ViscousListener::GetSolidMesh( _mesh, exp.Current(), /*toCreate=*/false))
1019 return SMESH_ComputeErrorPtr(); // everything already computed
1023 // TODO: ignore already computed SOLIDs
1024 if ( !findSolidsWithLayers())
1027 if ( !findFacesWithLayers() )
1030 for ( unsigned i = 0; i < _sdVec.size(); ++i )
1032 if ( ! makeLayer(_sdVec[i]) )
1035 if ( _sdVec[i]._edges.size() == 0 )
1038 if ( ! inflate(_sdVec[i]) )
1041 if ( ! refine(_sdVec[i]) )
1047 addBoundaryElements();
1049 makeGroupOfLE(); // debug
1055 //================================================================================
1057 * \brief Finds SOLIDs to compute using viscous layers. Fills _sdVec
1059 //================================================================================
1061 bool _ViscousBuilder::findSolidsWithLayers()
1064 TopTools_IndexedMapOfShape allSolids;
1065 TopExp::MapShapes( _mesh->GetShapeToMesh(), TopAbs_SOLID, allSolids );
1066 _sdVec.reserve( allSolids.Extent());
1068 SMESH_Gen* gen = _mesh->GetGen();
1069 for ( int i = 1; i <= allSolids.Extent(); ++i )
1071 // find StdMeshers_ViscousLayers hyp assigned to the i-th solid
1072 SMESH_Algo* algo = gen->GetAlgo( *_mesh, allSolids(i) );
1073 if ( !algo ) continue;
1074 // TODO: check if algo is hidden
1075 const list <const SMESHDS_Hypothesis *> & allHyps =
1076 algo->GetUsedHypothesis(*_mesh, allSolids(i), /*ignoreAuxiliary=*/false);
1077 list< const SMESHDS_Hypothesis *>::const_iterator hyp = allHyps.begin();
1078 const StdMeshers_ViscousLayers* viscHyp = 0;
1079 for ( ; hyp != allHyps.end() && !viscHyp; ++hyp )
1080 viscHyp = dynamic_cast<const StdMeshers_ViscousLayers*>( *hyp );
1083 _MeshOfSolid* proxyMesh = _ViscousListener::GetSolidMesh( _mesh,
1086 _sdVec.push_back( _SolidData( allSolids(i), viscHyp, proxyMesh ));
1087 _sdVec.back()._index = getMeshDS()->ShapeToIndex( allSolids(i));
1090 if ( _sdVec.empty() )
1092 ( SMESH_Comment(StdMeshers_ViscousLayers::GetHypType()) << " hypothesis not found",0);
1097 //================================================================================
1101 //================================================================================
1103 bool _ViscousBuilder::findFacesWithLayers()
1105 // collect all faces to ignore defined by hyp
1106 vector<TopoDS_Shape> ignoreFaces;
1107 for ( unsigned i = 0; i < _sdVec.size(); ++i )
1109 vector<TGeomID> ids = _sdVec[i]._hyp->GetBndShapes();
1110 for ( unsigned i = 0; i < ids.size(); ++i )
1112 const TopoDS_Shape& s = getMeshDS()->IndexToShape( ids[i] );
1113 if ( !s.IsNull() && s.ShapeType() == TopAbs_FACE )
1115 _ignoreShapeIds.insert( ids[i] );
1116 ignoreFaces.push_back( s );
1121 // ignore internal faces
1122 SMESH_MesherHelper helper( *_mesh );
1123 TopExp_Explorer exp;
1124 for ( unsigned i = 0; i < _sdVec.size(); ++i )
1126 exp.Init( _sdVec[i]._solid.Oriented( TopAbs_FORWARD ), TopAbs_FACE );
1127 for ( ; exp.More(); exp.Next() )
1129 TGeomID faceInd = getMeshDS()->ShapeToIndex( exp.Current() );
1130 if ( helper.NbAncestors( exp.Current(), *_mesh, TopAbs_SOLID ) > 1 )
1132 _ignoreShapeIds.insert( faceInd );
1133 ignoreFaces.push_back( exp.Current() );
1134 if ( helper.IsReversedSubMesh( TopoDS::Face( exp.Current() )))
1135 _sdVec[i]._reversedFaceIds.insert( faceInd );
1140 // Find faces to shrink mesh on (solution 2 in issue 0020832);
1141 TopTools_IndexedMapOfShape shapes;
1142 for ( unsigned i = 0; i < _sdVec.size(); ++i )
1145 TopExp::MapShapes(_sdVec[i]._solid, TopAbs_EDGE, shapes);
1146 for ( int iE = 1; iE <= shapes.Extent(); ++iE )
1148 const TopoDS_Shape& edge = shapes(iE);
1149 // find 2 faces sharing an edge
1151 PShapeIteratorPtr fIt = helper.GetAncestors(edge, *_mesh, TopAbs_FACE);
1152 while ( fIt->more())
1154 const TopoDS_Shape* f = fIt->next();
1155 if ( helper.IsSubShape( *f, _sdVec[i]._solid))
1156 FF[ int( !FF[0].IsNull()) ] = *f;
1158 if( FF[1].IsNull() ) continue; // seam edge can be shared by 1 FACE only
1159 // check presence of layers on them
1161 for ( int j = 0; j < 2; ++j )
1162 ignore[j] = _ignoreShapeIds.count ( getMeshDS()->ShapeToIndex( FF[j] ));
1163 if ( ignore[0] == ignore[1] ) continue; // nothing interesting
1164 TopoDS_Shape fWOL = FF[ ignore[0] ? 0 : 1 ];
1166 TGeomID edgeInd = getMeshDS()->ShapeToIndex( edge );
1167 _sdVec[i]._shrinkShape2Shape.insert( make_pair( edgeInd, fWOL ));
1170 // Exclude from _shrinkShape2Shape FACE's that can't be shrinked since
1171 // the algo of the SOLID sharing the FACE does not support it
1172 set< string > notSupportAlgos; notSupportAlgos.insert("Hexa_3D");
1173 for ( unsigned i = 0; i < _sdVec.size(); ++i )
1175 TopTools_MapOfShape noShrinkVertices;
1176 map< TGeomID, TopoDS_Shape >::iterator e2f = _sdVec[i]._shrinkShape2Shape.begin();
1177 for ( ; e2f != _sdVec[i]._shrinkShape2Shape.end(); ++e2f )
1179 const TopoDS_Shape& fWOL = e2f->second;
1180 TGeomID edgeID = e2f->first;
1181 bool notShrinkFace = false;
1182 PShapeIteratorPtr soIt = helper.GetAncestors(fWOL, *_mesh, TopAbs_SOLID);
1183 while ( soIt->more())
1185 const TopoDS_Shape* solid = soIt->next();
1186 if ( _sdVec[i]._solid.IsSame( *solid )) continue;
1187 SMESH_Algo* algo = _mesh->GetGen()->GetAlgo( *_mesh, *solid );
1188 if ( !algo || !notSupportAlgos.count( algo->GetName() )) continue;
1189 notShrinkFace = true;
1190 for ( unsigned j = 0; j < _sdVec.size(); ++j )
1192 if ( _sdVec[j]._solid.IsSame( *solid ) )
1193 if ( _sdVec[j]._shrinkShape2Shape.count( edgeID ))
1194 notShrinkFace = false;
1197 if ( notShrinkFace )
1199 _sdVec[i]._noShrinkFaces.insert( getMeshDS()->ShapeToIndex( fWOL ));
1200 for ( TopExp_Explorer vExp( fWOL, TopAbs_VERTEX ); vExp.More(); vExp.Next() )
1201 noShrinkVertices.Add( vExp.Current() );
1204 // erase from _shrinkShape2Shape all srink EDGE's of a SOLID connected
1205 // to the found not shrinked fWOL's
1206 e2f = _sdVec[i]._shrinkShape2Shape.begin();
1207 for ( ; e2f != _sdVec[i]._shrinkShape2Shape.end(); )
1209 TGeomID edgeID = e2f->first;
1210 TopoDS_Vertex VV[2];
1211 TopExp::Vertices( TopoDS::Edge( getMeshDS()->IndexToShape( edgeID )),VV[0],VV[1]);
1212 if ( noShrinkVertices.Contains( VV[0] ) || noShrinkVertices.Contains( VV[1] ))
1214 _sdVec[i]._noShrinkFaces.insert( getMeshDS()->ShapeToIndex( e2f->second ));
1215 _sdVec[i]._shrinkShape2Shape.erase( e2f++ );
1224 // Find the SHAPE along which to inflate _LayerEdge based on VERTEX
1226 for ( unsigned i = 0; i < _sdVec.size(); ++i )
1229 TopExp::MapShapes(_sdVec[i]._solid, TopAbs_VERTEX, shapes);
1230 for ( int iV = 1; iV <= shapes.Extent(); ++iV )
1232 const TopoDS_Shape& vertex = shapes(iV);
1233 // find faces WOL sharing the vertex
1234 vector< TopoDS_Shape > facesWOL;
1235 int totalNbFaces = 0;
1236 PShapeIteratorPtr fIt = helper.GetAncestors(vertex, *_mesh, TopAbs_FACE);
1237 while ( fIt->more())
1239 const TopoDS_Shape* f = fIt->next();
1240 const int fID = getMeshDS()->ShapeToIndex( *f );
1241 if ( helper.IsSubShape( *f, _sdVec[i]._solid ) )
1244 if ( _ignoreShapeIds.count ( fID ) && ! _sdVec[i]._noShrinkFaces.count( fID ))
1245 facesWOL.push_back( *f );
1248 if ( facesWOL.size() == totalNbFaces || facesWOL.empty() )
1249 continue; // no layers at this vertex or no WOL
1250 TGeomID vInd = getMeshDS()->ShapeToIndex( vertex );
1251 switch ( facesWOL.size() )
1255 helper.SetSubShape( facesWOL[0] );
1256 if ( helper.IsRealSeam( vInd )) // inflate along a seam edge?
1258 TopoDS_Shape seamEdge;
1259 PShapeIteratorPtr eIt = helper.GetAncestors(vertex, *_mesh, TopAbs_EDGE);
1260 while ( eIt->more() && seamEdge.IsNull() )
1262 const TopoDS_Shape* e = eIt->next();
1263 if ( helper.IsRealSeam( *e ) )
1266 if ( !seamEdge.IsNull() )
1268 _sdVec[i]._shrinkShape2Shape.insert( make_pair( vInd, seamEdge ));
1272 _sdVec[i]._shrinkShape2Shape.insert( make_pair( vInd, facesWOL[0] ));
1277 // find an edge shared by 2 faces
1278 PShapeIteratorPtr eIt = helper.GetAncestors(vertex, *_mesh, TopAbs_EDGE);
1279 while ( eIt->more())
1281 const TopoDS_Shape* e = eIt->next();
1282 if ( helper.IsSubShape( *e, facesWOL[0]) &&
1283 helper.IsSubShape( *e, facesWOL[1]))
1285 _sdVec[i]._shrinkShape2Shape.insert( make_pair( vInd, *e )); break;
1291 return error("Not yet supported case", _sdVec[i]._index);
1299 //================================================================================
1301 * \brief Create the inner surface of the viscous layer and prepare data for infation
1303 //================================================================================
1305 bool _ViscousBuilder::makeLayer(_SolidData& data)
1307 // get all sub-shapes to make layers on
1308 set<TGeomID> subIds, faceIds;
1309 subIds = data._noShrinkFaces;
1310 TopExp_Explorer exp( data._solid, TopAbs_FACE );
1311 for ( ; exp.More(); exp.Next() )
1312 if ( ! _ignoreShapeIds.count( getMeshDS()->ShapeToIndex( exp.Current() )))
1314 SMESH_subMesh* fSubM = _mesh->GetSubMesh( exp.Current() );
1315 faceIds.insert( fSubM->GetId() );
1316 SMESH_subMeshIteratorPtr subIt =
1317 fSubM->getDependsOnIterator(/*includeSelf=*/true, /*complexShapeFirst=*/false);
1318 while ( subIt->more() )
1319 subIds.insert( subIt->next()->GetId() );
1322 // make a map to find new nodes on sub-shapes shared with other SOLID
1323 map< TGeomID, TNode2Edge* > s2neMap;
1324 map< TGeomID, TNode2Edge* >::iterator s2ne;
1325 map< TGeomID, TopoDS_Shape >::iterator s2s = data._shrinkShape2Shape.begin();
1326 for (; s2s != data._shrinkShape2Shape.end(); ++s2s )
1328 TGeomID shapeInd = s2s->first;
1329 for ( unsigned i = 0; i < _sdVec.size(); ++i )
1331 if ( _sdVec[i]._index == data._index ) continue;
1332 map< TGeomID, TopoDS_Shape >::iterator s2s2 = _sdVec[i]._shrinkShape2Shape.find( shapeInd );
1333 if ( s2s2 != _sdVec[i]._shrinkShape2Shape.end() &&
1334 *s2s == *s2s2 && !_sdVec[i]._n2eMap.empty() )
1336 s2neMap.insert( make_pair( shapeInd, &_sdVec[i]._n2eMap ));
1342 // Create temporary faces and _LayerEdge's
1344 dumpFunction(SMESH_Comment("makeLayers_")<<data._index);
1346 data._stepSize = Precision::Infinite();
1347 data._stepSizeNodes[0] = 0;
1349 SMESH_MesherHelper helper( *_mesh );
1350 helper.SetSubShape( data._solid );
1351 helper.SetElementsOnShape(true);
1353 vector< const SMDS_MeshNode*> newNodes; // of a mesh face
1354 TNode2Edge::iterator n2e2;
1356 // collect _LayerEdge's of shapes they are based on
1357 const int nbShapes = getMeshDS()->MaxShapeIndex();
1358 vector< vector<_LayerEdge*> > edgesByGeom( nbShapes+1 );
1360 for ( set<TGeomID>::iterator id = faceIds.begin(); id != faceIds.end(); ++id )
1362 SMESHDS_SubMesh* smDS = getMeshDS()->MeshElements( *id );
1363 if ( !smDS ) return error(SMESH_Comment("Not meshed face ") << *id, data._index );
1365 const TopoDS_Face& F = TopoDS::Face( getMeshDS()->IndexToShape( *id ));
1366 SMESH_ProxyMesh::SubMesh* proxySub =
1367 data._proxyMesh->getFaceSubM( F, /*create=*/true);
1369 SMDS_ElemIteratorPtr eIt = smDS->GetElements();
1370 while ( eIt->more() )
1372 const SMDS_MeshElement* face = eIt->next();
1373 newNodes.resize( face->NbCornerNodes() );
1374 double faceMaxCosin = -1;
1375 for ( int i = 0 ; i < face->NbCornerNodes(); ++i )
1377 const SMDS_MeshNode* n = face->GetNode(i);
1378 TNode2Edge::iterator n2e = data._n2eMap.insert( make_pair( n, (_LayerEdge*)0 )).first;
1379 if ( !(*n2e).second )
1382 _LayerEdge* edge = new _LayerEdge();
1384 edge->_nodes.push_back( n );
1385 const int shapeID = n->getshapeId();
1386 edgesByGeom[ shapeID ].push_back( edge );
1388 // set edge data or find already refined _LayerEdge and get data from it
1389 if ( n->GetPosition()->GetTypeOfPosition() != SMDS_TOP_FACE &&
1390 ( s2ne = s2neMap.find( shapeID )) != s2neMap.end() &&
1391 ( n2e2 = (*s2ne).second->find( n )) != s2ne->second->end())
1393 _LayerEdge* foundEdge = (*n2e2).second;
1394 edge->Copy( *foundEdge, helper );
1395 // location of the last node is modified but we can restore
1396 // it by node position on _sWOL stored by the node
1397 const_cast< SMDS_MeshNode* >
1398 ( edge->_nodes.back() )->setXYZ( n->X(), n->Y(), n->Z() );
1402 edge->_nodes.push_back( helper.AddNode( n->X(), n->Y(), n->Z() ));
1403 if ( !setEdgeData( *edge, subIds, helper, data ))
1406 dumpMove(edge->_nodes.back());
1407 if ( edge->_cosin > 0.01 )
1409 if ( edge->_cosin > faceMaxCosin )
1410 faceMaxCosin = edge->_cosin;
1413 newNodes[ i ] = n2e->second->_nodes.back();
1415 // create a temporary face
1416 const SMDS_MeshElement* newFace = new TmpMeshFace( newNodes, --_tmpFaceID );
1417 proxySub->AddElement( newFace );
1419 // compute inflation step size by min size of element on a convex surface
1420 if ( faceMaxCosin > 0.1 )
1421 limitStepSize( data, face, faceMaxCosin );
1422 } // loop on 2D elements on a FACE
1423 } // loop on FACEs of a SOLID
1425 data._epsilon = 1e-7;
1426 if ( data._stepSize < 1. )
1427 data._epsilon *= data._stepSize;
1429 // Put _LayerEdge's into the vector data._edges
1431 if ( !sortEdges( data, edgesByGeom ))
1434 // Set target nodes into _Simplex and _2NearEdges
1435 TNode2Edge::iterator n2e;
1436 for ( unsigned i = 0; i < data._edges.size(); ++i )
1438 if ( data._edges[i]->IsOnEdge())
1439 for ( int j = 0; j < 2; ++j )
1441 if ( data._edges[i]->_nodes.back()->NbInverseElements(SMDSAbs_Volume) > 0 )
1442 break; // _LayerEdge is shared by two _SolidData's
1443 const SMDS_MeshNode* & n = data._edges[i]->_2neibors->_nodes[j];
1444 if (( n2e = data._n2eMap.find( n )) == data._n2eMap.end() )
1445 return error("_LayerEdge not found by src node", data._index);
1446 n = (*n2e).second->_nodes.back();
1447 data._edges[i]->_2neibors->_edges[j] = n2e->second;
1450 for ( unsigned j = 0; j < data._edges[i]->_simplices.size(); ++j )
1452 _Simplex& s = data._edges[i]->_simplices[j];
1453 s._nNext = data._n2eMap[ s._nNext ]->_nodes.back();
1454 s._nPrev = data._n2eMap[ s._nPrev ]->_nodes.back();
1462 //================================================================================
1464 * \brief Compute inflation step size by min size of element on a convex surface
1466 //================================================================================
1468 void _ViscousBuilder::limitStepSize( _SolidData& data,
1469 const SMDS_MeshElement* face,
1473 double minSize = 10 * data._stepSize;
1474 const int nbNodes = face->NbCornerNodes();
1475 for ( int i = 0; i < nbNodes; ++i )
1477 const SMDS_MeshNode* nextN = face->GetNode( SMESH_MesherHelper::WrapIndex( i+1, nbNodes ));
1478 const SMDS_MeshNode* curN = face->GetNode( i );
1479 if ( nextN->GetPosition()->GetTypeOfPosition() == SMDS_TOP_FACE ||
1480 curN->GetPosition()->GetTypeOfPosition() == SMDS_TOP_FACE )
1482 double dist = SMESH_TNodeXYZ( face->GetNode(i)).Distance( nextN );
1483 if ( dist < minSize )
1484 minSize = dist, iN = i;
1487 double newStep = 0.8 * minSize / cosin;
1488 if ( newStep < data._stepSize )
1490 data._stepSize = newStep;
1491 data._stepSizeCoeff = 0.8 / cosin;
1492 data._stepSizeNodes[0] = face->GetNode( iN );
1493 data._stepSizeNodes[1] = face->GetNode( SMESH_MesherHelper::WrapIndex( iN+1, nbNodes ));
1497 //================================================================================
1499 * \brief Compute inflation step size by min size of element on a convex surface
1501 //================================================================================
1503 void _ViscousBuilder::limitStepSize( _SolidData& data, const double minSize)
1505 if ( minSize < data._stepSize )
1507 data._stepSize = minSize;
1508 if ( data._stepSizeNodes[0] )
1511 SMESH_TNodeXYZ(data._stepSizeNodes[0]).Distance(data._stepSizeNodes[1]);
1512 data._stepSizeCoeff = data._stepSize / dist;
1517 //================================================================================
1519 * \brief Separate shapes (and _LayerEdge's on them) to smooth from the rest ones
1521 //================================================================================
1523 bool _ViscousBuilder::sortEdges( _SolidData& data,
1524 vector< vector<_LayerEdge*> >& edgesByGeom)
1526 // Find shapes needing smoothing; such a shape has _LayerEdge._normal on it's
1527 // boundry inclined at a sharp angle to the shape
1529 list< TGeomID > shapesToSmooth;
1531 SMESH_MesherHelper helper( *_mesh );
1534 for ( unsigned iS = 0; iS < edgesByGeom.size(); ++iS )
1536 vector<_LayerEdge*>& eS = edgesByGeom[iS];
1537 if ( eS.empty() ) continue;
1538 TopoDS_Shape S = getMeshDS()->IndexToShape( iS );
1539 bool needSmooth = false;
1540 switch ( S.ShapeType() )
1544 bool isShrinkEdge = !eS[0]->_sWOL.IsNull();
1545 for ( TopoDS_Iterator vIt( S ); vIt.More() && !needSmooth; vIt.Next() )
1547 TGeomID iV = getMeshDS()->ShapeToIndex( vIt.Value() );
1548 vector<_LayerEdge*>& eV = edgesByGeom[ iV ];
1549 if ( eV.empty() ) continue;
1550 double cosin = eV[0]->_cosin;
1552 ( !eV[0]->_sWOL.IsNull() && ( eV[0]->_sWOL.ShapeType() == TopAbs_EDGE || !isShrinkEdge));
1556 if ( eV[0]->_sWOL.ShapeType() == TopAbs_EDGE )
1557 dir1 = getEdgeDir( TopoDS::Edge( eV[0]->_sWOL ), TopoDS::Vertex( vIt.Value() ));
1559 dir1 = getFaceDir( TopoDS::Face( eV[0]->_sWOL ), TopoDS::Vertex( vIt.Value() ),
1560 eV[0]->_nodes[0], helper, ok);
1561 dir2 = getEdgeDir( TopoDS::Edge( S ), TopoDS::Vertex( vIt.Value() ));
1562 double angle = dir1.Angle( dir2 );
1563 cosin = cos( angle );
1565 needSmooth = ( cosin > 0.1 );
1571 for ( TopExp_Explorer eExp( S, TopAbs_EDGE ); eExp.More() && !needSmooth; eExp.Next() )
1573 TGeomID iE = getMeshDS()->ShapeToIndex( eExp.Current() );
1574 vector<_LayerEdge*>& eE = edgesByGeom[ iE ];
1575 if ( eE.empty() ) continue;
1576 if ( eE[0]->_sWOL.IsNull() )
1578 for ( unsigned i = 0; i < eE.size() && !needSmooth; ++i )
1579 needSmooth = ( eE[i]->_cosin > 0.1 );
1583 const TopoDS_Face& F1 = TopoDS::Face( S );
1584 const TopoDS_Face& F2 = TopoDS::Face( eE[0]->_sWOL );
1585 const TopoDS_Edge& E = TopoDS::Edge( eExp.Current() );
1586 for ( unsigned i = 0; i < eE.size() && !needSmooth; ++i )
1588 gp_Vec dir1 = getFaceDir( F1, E, eE[i]->_nodes[0], helper, ok );
1589 gp_Vec dir2 = getFaceDir( F2, E, eE[i]->_nodes[0], helper, ok );
1590 double angle = dir1.Angle( dir2 );
1591 double cosin = cos( angle );
1592 needSmooth = ( cosin > 0.1 );
1604 if ( S.ShapeType() == TopAbs_EDGE ) shapesToSmooth.push_front( iS );
1605 else shapesToSmooth.push_back ( iS );
1608 } // loop on edgesByGeom
1610 data._edges.reserve( data._n2eMap.size() );
1611 data._endEdgeToSmooth.clear();
1613 // first we put _LayerEdge's on shapes to smooth
1614 list< TGeomID >::iterator gIt = shapesToSmooth.begin();
1615 for ( ; gIt != shapesToSmooth.end(); ++gIt )
1617 vector<_LayerEdge*>& eVec = edgesByGeom[ *gIt ];
1618 if ( eVec.empty() ) continue;
1619 data._edges.insert( data._edges.end(), eVec.begin(), eVec.end() );
1620 data._endEdgeToSmooth.push_back( data._edges.size() );
1624 // then the rest _LayerEdge's
1625 for ( unsigned iS = 0; iS < edgesByGeom.size(); ++iS )
1627 vector<_LayerEdge*>& eVec = edgesByGeom[iS];
1628 data._edges.insert( data._edges.end(), eVec.begin(), eVec.end() );
1635 //================================================================================
1637 * \brief Set data of _LayerEdge needed for smoothing
1638 * \param subIds - ids of sub-shapes of a SOLID to take into account faces from
1640 //================================================================================
1642 bool _ViscousBuilder::setEdgeData(_LayerEdge& edge,
1643 const set<TGeomID>& subIds,
1644 SMESH_MesherHelper& helper,
1647 SMESH_MeshEditor editor(_mesh);
1649 const SMDS_MeshNode* node = edge._nodes[0]; // source node
1650 SMDS_TypeOfPosition posType = node->GetPosition()->GetTypeOfPosition();
1654 edge._curvature = 0;
1656 // --------------------------
1657 // Compute _normal and _cosin
1658 // --------------------------
1661 edge._normal.SetCoord(0,0,0);
1663 int totalNbFaces = 0;
1665 gp_Vec du, dv, geomNorm;
1668 TGeomID shapeInd = node->getshapeId();
1669 map< TGeomID, TopoDS_Shape >::const_iterator s2s = data._shrinkShape2Shape.find( shapeInd );
1670 bool onShrinkShape ( s2s != data._shrinkShape2Shape.end() );
1671 TopoDS_Shape vertEdge;
1673 if ( onShrinkShape ) // one of faces the node is on has no layers
1675 vertEdge = getMeshDS()->IndexToShape( s2s->first ); // vertex or edge
1676 if ( s2s->second.ShapeType() == TopAbs_EDGE )
1678 // inflate from VERTEX along EDGE
1679 edge._normal = getEdgeDir( TopoDS::Edge( s2s->second ), TopoDS::Vertex( vertEdge ));
1681 else if ( vertEdge.ShapeType() == TopAbs_VERTEX )
1683 // inflate from VERTEX along FACE
1684 edge._normal = getFaceDir( TopoDS::Face( s2s->second ), TopoDS::Vertex( vertEdge ),
1685 node, helper, normOK, &edge._cosin);
1689 // inflate from EDGE along FACE
1690 edge._normal = getFaceDir( TopoDS::Face( s2s->second ), TopoDS::Edge( vertEdge ),
1691 node, helper, normOK);
1694 else // layers are on all faces of SOLID the node is on
1696 // find indices of geom faces the node lies on
1697 set<TGeomID> faceIds;
1698 if ( posType == SMDS_TOP_FACE )
1700 faceIds.insert( node->getshapeId() );
1704 SMDS_ElemIteratorPtr fIt = node->GetInverseElementIterator(SMDSAbs_Face);
1705 while ( fIt->more() )
1706 faceIds.insert( editor.FindShape(fIt->next()));
1709 set<TGeomID>::iterator id = faceIds.begin();
1711 for ( ; id != faceIds.end(); ++id )
1713 const TopoDS_Shape& s = getMeshDS()->IndexToShape( *id );
1714 if ( s.IsNull() || s.ShapeType() != TopAbs_FACE || !subIds.count( *id ))
1717 //nbLayerFaces += subIds.count( *id );
1718 F = TopoDS::Face( s );
1720 gp_XY uv = helper.GetNodeUV( F, node, 0, &normOK );
1721 Handle(Geom_Surface) surface = BRep_Tool::Surface( F );
1722 surface->D1( uv.X(),uv.Y(), p, du,dv );
1724 double size2 = geomNorm.SquareMagnitude();
1725 if ( size2 > numeric_limits<double>::min() )
1726 geomNorm /= sqrt( size2 );
1729 if ( helper.GetSubShapeOri( data._solid, F ) != TopAbs_REVERSED )
1731 edge._normal += geomNorm.XYZ();
1733 if ( totalNbFaces == 0 )
1734 return error(SMESH_Comment("Can't get normal to node ") << node->GetID(), data._index);
1736 edge._normal /= totalNbFaces;
1741 edge._cosin = 0; break;
1743 case SMDS_TOP_EDGE: {
1744 TopoDS_Edge E = TopoDS::Edge( helper.GetSubShapeByNode( node, getMeshDS()));
1745 gp_Vec inFaceDir = getFaceDir( F, E, node, helper, normOK);
1746 double angle = inFaceDir.Angle( edge._normal ); // [0,PI]
1747 edge._cosin = cos( angle );
1748 //cout << "Cosin on EDGE " << edge._cosin << " node " << node->GetID() << endl;
1751 case SMDS_TOP_VERTEX: {
1752 TopoDS_Vertex V = TopoDS::Vertex( helper.GetSubShapeByNode( node, getMeshDS()));
1753 gp_XYZ inFaceDir = getFaceDir( F, V, node, helper, normOK);
1754 double angle = gp_Vec( inFaceDir).Angle( edge._normal ); // [0,PI]
1755 edge._cosin = cos( angle );
1756 //cout << "Cosin on VERTEX " << edge._cosin << " node " << node->GetID() << endl;
1760 return error(SMESH_Comment("Invalid shape position of node ")<<node, data._index);
1764 double normSize = edge._normal.SquareModulus();
1765 if ( normSize < numeric_limits<double>::min() )
1766 return error(SMESH_Comment("Bad normal at node ")<< node->GetID(), data._index );
1768 edge._normal /= sqrt( normSize );
1770 // TODO: if ( !normOK ) then get normal by mesh faces
1772 // Set the rest data
1773 // --------------------
1774 if ( onShrinkShape )
1776 edge._sWOL = (*s2s).second;
1778 SMDS_MeshNode* tgtNode = const_cast<SMDS_MeshNode*>( edge._nodes.back() );
1779 if ( SMESHDS_SubMesh* sm = getMeshDS()->MeshElements( data._solid ))
1780 sm->RemoveNode( tgtNode , /*isNodeDeleted=*/false );
1782 // set initial position which is parameters on _sWOL in this case
1783 if ( edge._sWOL.ShapeType() == TopAbs_EDGE )
1785 double u = helper.GetNodeU( TopoDS::Edge( edge._sWOL ), node, 0, &normOK );
1786 edge._pos.push_back( gp_XYZ( u, 0, 0));
1787 getMeshDS()->SetNodeOnEdge( tgtNode, TopoDS::Edge( edge._sWOL ), u );
1791 gp_XY uv = helper.GetNodeUV( TopoDS::Face( edge._sWOL ), node, 0, &normOK );
1792 edge._pos.push_back( gp_XYZ( uv.X(), uv.Y(), 0));
1793 getMeshDS()->SetNodeOnFace( tgtNode, TopoDS::Face( edge._sWOL ), uv.X(), uv.Y() );
1798 edge._pos.push_back( SMESH_TNodeXYZ( node ));
1800 if ( posType == SMDS_TOP_FACE )
1802 getSimplices( node, edge._simplices, _ignoreShapeIds, &data );
1803 double avgNormProj = 0, avgLen = 0;
1804 for ( unsigned i = 0; i < edge._simplices.size(); ++i )
1806 gp_XYZ vec = edge._pos.back() - SMESH_TNodeXYZ( edge._simplices[i]._nPrev );
1807 avgNormProj += edge._normal * vec;
1808 avgLen += vec.Modulus();
1810 avgNormProj /= edge._simplices.size();
1811 avgLen /= edge._simplices.size();
1812 edge._curvature = _Curvature::New( avgNormProj, avgLen );
1816 // Set neighbour nodes for a _LayerEdge based on EDGE
1818 if ( posType == SMDS_TOP_EDGE /*||
1819 ( onShrinkShape && posType == SMDS_TOP_VERTEX && fabs( edge._cosin ) < 1e-10 )*/)
1821 edge._2neibors = new _2NearEdges;
1822 // target node instead of source ones will be set later
1823 if ( ! findNeiborsOnEdge( &edge,
1824 edge._2neibors->_nodes[0],
1825 edge._2neibors->_nodes[1],
1828 edge.SetDataByNeighbors( edge._2neibors->_nodes[0],
1829 edge._2neibors->_nodes[1],
1833 edge.SetCosin( edge._cosin ); // to update edge._lenFactor
1838 //================================================================================
1840 * \brief Find 2 neigbor nodes of a node on EDGE
1842 //================================================================================
1844 bool _ViscousBuilder::findNeiborsOnEdge(const _LayerEdge* edge,
1845 const SMDS_MeshNode*& n1,
1846 const SMDS_MeshNode*& n2,
1849 const SMDS_MeshNode* node = edge->_nodes[0];
1850 const int shapeInd = node->getshapeId();
1851 SMESHDS_SubMesh* edgeSM = 0;
1852 if ( node->GetPosition()->GetTypeOfPosition() == SMDS_TOP_EDGE )
1855 edgeSM = getMeshDS()->MeshElements( shapeInd );
1856 if ( !edgeSM || edgeSM->NbElements() == 0 )
1857 return error(SMESH_Comment("Not meshed EDGE ") << shapeInd, data._index);
1861 SMDS_ElemIteratorPtr eIt = node->GetInverseElementIterator(SMDSAbs_Edge);
1862 while ( eIt->more() && !n2 )
1864 const SMDS_MeshElement* e = eIt->next();
1865 const SMDS_MeshNode* nNeibor = e->GetNode( 0 );
1866 if ( nNeibor == node ) nNeibor = e->GetNode( 1 );
1869 if (!edgeSM->Contains(e)) continue;
1873 TopoDS_Shape s = SMESH_MesherHelper::GetSubShapeByNode(nNeibor, getMeshDS() );
1874 if ( !SMESH_MesherHelper::IsSubShape( s, edge->_sWOL )) continue;
1876 ( iN++ ? n2 : n1 ) = nNeibor;
1879 return error(SMESH_Comment("Wrongly meshed EDGE ") << shapeInd, data._index);
1883 //================================================================================
1885 * \brief Set _curvature and _2neibors->_plnNorm by 2 neigbor nodes residing the same EDGE
1887 //================================================================================
1889 void _LayerEdge::SetDataByNeighbors( const SMDS_MeshNode* n1,
1890 const SMDS_MeshNode* n2,
1891 SMESH_MesherHelper& helper)
1893 if ( _nodes[0]->GetPosition()->GetTypeOfPosition() != SMDS_TOP_EDGE )
1896 gp_XYZ pos = SMESH_TNodeXYZ( _nodes[0] );
1897 gp_XYZ vec1 = pos - SMESH_TNodeXYZ( n1 );
1898 gp_XYZ vec2 = pos - SMESH_TNodeXYZ( n2 );
1902 double sumLen = vec1.Modulus() + vec2.Modulus();
1903 _2neibors->_wgt[0] = 1 - vec1.Modulus() / sumLen;
1904 _2neibors->_wgt[1] = 1 - vec2.Modulus() / sumLen;
1905 double avgNormProj = 0.5 * ( _normal * vec1 + _normal * vec2 );
1906 double avgLen = 0.5 * ( vec1.Modulus() + vec2.Modulus() );
1907 if ( _curvature ) delete _curvature;
1908 _curvature = _Curvature::New( avgNormProj, avgLen );
1910 // if ( _curvature )
1911 // cout << _nodes[0]->GetID()
1912 // << " CURV r,k: " << _curvature->_r<<","<<_curvature->_k
1913 // << " proj = "<<avgNormProj<< " len = " << avgLen << "| lenDelta(0) = "
1914 // << _curvature->lenDelta(0) << endl;
1919 if ( _sWOL.IsNull() )
1921 TopoDS_Shape S = helper.GetSubShapeByNode( _nodes[0], helper.GetMeshDS() );
1922 gp_XYZ dirE = getEdgeDir( TopoDS::Edge( S ), _nodes[0], helper );
1923 gp_XYZ plnNorm = dirE ^ _normal;
1924 double proj0 = plnNorm * vec1;
1925 double proj1 = plnNorm * vec2;
1926 if ( fabs( proj0 ) > 1e-10 || fabs( proj1 ) > 1e-10 )
1928 if ( _2neibors->_plnNorm ) delete _2neibors->_plnNorm;
1929 _2neibors->_plnNorm = new gp_XYZ( plnNorm.Normalized() );
1934 //================================================================================
1936 * \brief Copy data from a _LayerEdge of other SOLID and based on the same node;
1937 * this and other _LayerEdge's are inflated along a FACE or an EDGE
1939 //================================================================================
1941 void _LayerEdge::Copy( _LayerEdge& other, SMESH_MesherHelper& helper )
1943 _nodes = other._nodes;
1944 _normal = other._normal;
1946 _lenFactor = other._lenFactor;
1947 _cosin = other._cosin;
1948 _sWOL = other._sWOL;
1949 _2neibors = other._2neibors;
1950 _curvature = 0; std::swap( _curvature, other._curvature );
1951 _2neibors = 0; std::swap( _2neibors, other._2neibors );
1953 if ( _sWOL.ShapeType() == TopAbs_EDGE )
1955 double u = helper.GetNodeU( TopoDS::Edge( _sWOL ), _nodes[0] );
1956 _pos.push_back( gp_XYZ( u, 0, 0));
1960 gp_XY uv = helper.GetNodeUV( TopoDS::Face( _sWOL ), _nodes[0]);
1961 _pos.push_back( gp_XYZ( uv.X(), uv.Y(), 0));
1965 //================================================================================
1967 * \brief Set _cosin and _lenFactor
1969 //================================================================================
1971 void _LayerEdge::SetCosin( double cosin )
1974 _lenFactor = ( _cosin > 0.1 ) ? 1./sqrt(1-_cosin*_cosin) : 1.0;
1977 //================================================================================
1979 * \brief Fills a vector<_Simplex >
1981 //================================================================================
1983 void _ViscousBuilder::getSimplices( const SMDS_MeshNode* node,
1984 vector<_Simplex>& simplices,
1985 const set<TGeomID>& ingnoreShapes,
1986 const _SolidData* dataToCheckOri,
1989 SMDS_ElemIteratorPtr fIt = node->GetInverseElementIterator(SMDSAbs_Face);
1990 while ( fIt->more() )
1992 const SMDS_MeshElement* f = fIt->next();
1993 const TGeomID shapeInd = f->getshapeId();
1994 if ( ingnoreShapes.count( shapeInd )) continue;
1995 const int nbNodes = f->NbCornerNodes();
1996 int srcInd = f->GetNodeIndex( node );
1997 const SMDS_MeshNode* nPrev = f->GetNode( SMESH_MesherHelper::WrapIndex( srcInd-1, nbNodes ));
1998 const SMDS_MeshNode* nNext = f->GetNode( SMESH_MesherHelper::WrapIndex( srcInd+1, nbNodes ));
1999 const SMDS_MeshNode* nOpp = f->GetNode( SMESH_MesherHelper::WrapIndex( srcInd+2, nbNodes ));
2000 if ( dataToCheckOri && dataToCheckOri->_reversedFaceIds.count( shapeInd ))
2001 std::swap( nPrev, nNext );
2002 simplices.push_back( _Simplex( nPrev, nNext, nOpp ));
2007 vector<_Simplex> sortedSimplices( simplices.size() );
2008 sortedSimplices[0] = simplices[0];
2010 for ( size_t i = 1; i < simplices.size(); ++i )
2012 for ( size_t j = 1; j < simplices.size(); ++j )
2013 if ( sortedSimplices[i-1]._nNext == simplices[j]._nPrev )
2015 sortedSimplices[i] = simplices[j];
2020 if ( nbFound == simplices.size() - 1 )
2021 simplices.swap( sortedSimplices );
2025 //================================================================================
2027 * \brief DEBUG. Create groups contating temorary data of _LayerEdge's
2029 //================================================================================
2031 void _ViscousBuilder::makeGroupOfLE()
2034 for ( unsigned i = 0 ; i < _sdVec.size(); ++i )
2036 if ( _sdVec[i]._edges.empty() ) continue;
2037 // string name = SMESH_Comment("_LayerEdge's_") << i;
2039 // SMESH_Group* g = _mesh->AddGroup(SMDSAbs_Edge, name.c_str(), id );
2040 // SMESHDS_Group* gDS = (SMESHDS_Group*)g->GetGroupDS();
2041 // SMESHDS_Mesh* mDS = _mesh->GetMeshDS();
2043 dumpFunction( SMESH_Comment("make_LayerEdge_") << i );
2044 for ( unsigned j = 0 ; j < _sdVec[i]._edges.size(); ++j )
2046 _LayerEdge* le = _sdVec[i]._edges[j];
2047 for ( unsigned iN = 1; iN < le->_nodes.size(); ++iN )
2048 dumpCmd(SMESH_Comment("mesh.AddEdge([ ") <<le->_nodes[iN-1]->GetID()
2049 << ", " << le->_nodes[iN]->GetID() <<"])");
2050 //gDS->SMDSGroup().Add( mDS->AddEdge( le->_nodes[iN-1], le->_nodes[iN]));
2054 dumpFunction( SMESH_Comment("makeNormals") << i );
2055 for ( unsigned j = 0 ; j < _sdVec[i]._edges.size(); ++j )
2057 _LayerEdge& edge = *_sdVec[i]._edges[j];
2058 SMESH_TNodeXYZ nXYZ( edge._nodes[0] );
2059 nXYZ += edge._normal * _sdVec[i]._stepSize;
2060 dumpCmd(SMESH_Comment("mesh.AddEdge([ ") <<edge._nodes[0]->GetID()
2061 << ", mesh.AddNode( " << nXYZ.X()<<","<< nXYZ.Y()<<","<< nXYZ.Z()<<")])");
2065 // name = SMESH_Comment("tmp_faces ") << i;
2066 // g = _mesh->AddGroup(SMDSAbs_Face, name.c_str(), id );
2067 // gDS = (SMESHDS_Group*)g->GetGroupDS();
2068 // SMESH_MeshEditor editor( _mesh );
2069 dumpFunction( SMESH_Comment("makeTmpFaces_") << i );
2070 TopExp_Explorer fExp( _sdVec[i]._solid, TopAbs_FACE );
2071 for ( ; fExp.More(); fExp.Next() )
2073 if (const SMESHDS_SubMesh* sm = _sdVec[i]._proxyMesh->GetProxySubMesh( fExp.Current()))
2075 SMDS_ElemIteratorPtr fIt = sm->GetElements();
2076 while ( fIt->more())
2078 const SMDS_MeshElement* e = fIt->next();
2079 SMESH_Comment cmd("mesh.AddFace([");
2080 for ( int j=0; j < e->NbCornerNodes(); ++j )
2081 cmd << e->GetNode(j)->GetID() << (j+1<e->NbCornerNodes() ? ",": "])");
2083 //vector<const SMDS_MeshNode*> nodes( e->begin_nodes(), e->end_nodes() );
2084 //gDS->SMDSGroup().Add( editor.AddElement( nodes, e->GetType(), e->IsPoly()));
2093 //================================================================================
2095 * \brief Increase length of _LayerEdge's to reach the required thickness of layers
2097 //================================================================================
2099 bool _ViscousBuilder::inflate(_SolidData& data)
2101 SMESH_MesherHelper helper( *_mesh );
2103 // Limit inflation step size by geometry size found by itersecting
2104 // normals of _LayerEdge's with mesh faces
2105 double geomSize = Precision::Infinite(), intersecDist;
2106 auto_ptr<SMESH_ElementSearcher> searcher
2107 ( SMESH_MeshAlgos::GetElementSearcher( *getMeshDS(),
2108 data._proxyMesh->GetFaces( data._solid )) );
2109 for ( unsigned i = 0; i < data._edges.size(); ++i )
2111 if ( data._edges[i]->IsOnEdge() ) continue;
2112 data._edges[i]->FindIntersection( *searcher, intersecDist, data._epsilon );
2113 if ( geomSize > intersecDist && intersecDist > 0 )
2114 geomSize = intersecDist;
2116 if ( data._stepSize > 0.3 * geomSize )
2117 limitStepSize( data, 0.3 * geomSize );
2119 const double tgtThick = data._hyp->GetTotalThickness();
2120 if ( data._stepSize > tgtThick )
2121 limitStepSize( data, tgtThick );
2123 if ( data._stepSize < 1. )
2124 data._epsilon = data._stepSize * 1e-7;
2127 cout << "-- geomSize = " << geomSize << ", stepSize = " << data._stepSize << endl;
2130 double avgThick = 0, curThick = 0, distToIntersection = Precision::Infinite();
2131 int nbSteps = 0, nbRepeats = 0;
2132 while ( 1.01 * avgThick < tgtThick )
2134 // new target length
2135 curThick += data._stepSize;
2136 if ( curThick > tgtThick )
2138 curThick = tgtThick + ( tgtThick-avgThick ) * nbRepeats;
2142 // Elongate _LayerEdge's
2143 dumpFunction(SMESH_Comment("inflate")<<data._index<<"_step"<<nbSteps); // debug
2144 for ( unsigned i = 0; i < data._edges.size(); ++i )
2146 data._edges[i]->SetNewLength( curThick, helper );
2151 if ( !updateNormals( data, helper ) )
2154 // Improve and check quality
2155 if ( !smoothAndCheck( data, nbSteps, distToIntersection ))
2159 dumpFunction(SMESH_Comment("invalidate")<<data._index<<"_step"<<nbSteps); // debug
2160 for ( unsigned i = 0; i < data._edges.size(); ++i )
2162 data._edges[i]->InvalidateStep( nbSteps+1 );
2166 break; // no more inflating possible
2170 // Evaluate achieved thickness
2172 for ( unsigned i = 0; i < data._edges.size(); ++i )
2173 avgThick += data._edges[i]->_len;
2174 avgThick /= data._edges.size();
2176 cout << "-- Thickness " << avgThick << " reached" << endl;
2179 if ( distToIntersection < avgThick*1.5 )
2182 cout << "-- Stop inflation since distToIntersection( "<<distToIntersection<<" ) < avgThick( "
2183 << avgThick << " ) * 1.5" << endl;
2188 limitStepSize( data, 0.25 * distToIntersection );
2189 if ( data._stepSizeNodes[0] )
2190 data._stepSize = data._stepSizeCoeff *
2191 SMESH_TNodeXYZ(data._stepSizeNodes[0]).Distance(data._stepSizeNodes[1]);
2195 return error("failed at the very first inflation step", data._index);
2200 //================================================================================
2202 * \brief Improve quality of layer inner surface and check intersection
2204 //================================================================================
2206 bool _ViscousBuilder::smoothAndCheck(_SolidData& data,
2208 double & distToIntersection)
2210 if ( data._endEdgeToSmooth.empty() )
2211 return true; // no shapes needing smoothing
2213 bool moved, improved;
2215 SMESH_MesherHelper helper(*_mesh);
2216 Handle(Geom_Surface) surface;
2220 for ( unsigned iS = 0; iS < data._endEdgeToSmooth.size(); ++iS )
2223 iEnd = data._endEdgeToSmooth[ iS ];
2225 if ( !data._edges[ iBeg ]->_sWOL.IsNull() &&
2226 data._edges[ iBeg ]->_sWOL.ShapeType() == TopAbs_FACE )
2228 if ( !F.IsSame( data._edges[ iBeg ]->_sWOL )) {
2229 F = TopoDS::Face( data._edges[ iBeg ]->_sWOL );
2230 helper.SetSubShape( F );
2231 surface = BRep_Tool::Surface( F );
2236 F.Nullify(); surface.Nullify();
2238 TGeomID sInd = data._edges[ iBeg ]->_nodes[0]->getshapeId();
2240 if ( data._edges[ iBeg ]->IsOnEdge() )
2242 dumpFunction(SMESH_Comment("smooth")<<data._index << "_Ed"<<sInd <<"_InfStep"<<nbSteps);
2244 // try a simple solution on an analytic EDGE
2245 if ( !smoothAnalyticEdge( data, iBeg, iEnd, surface, F, helper ))
2251 for ( int i = iBeg; i < iEnd; ++i )
2253 moved |= data._edges[i]->SmoothOnEdge(surface, F, helper);
2255 dumpCmd( SMESH_Comment("# end step ")<<step);
2257 while ( moved && step++ < 5 );
2258 //cout << " NB STEPS: " << step << endl;
2265 int step = 0, badNb = 0; moved = true;
2266 while (( ++step <= 5 && moved ) || improved )
2268 dumpFunction(SMESH_Comment("smooth")<<data._index<<"_Fa"<<sInd
2269 <<"_InfStep"<<nbSteps<<"_"<<step); // debug
2270 int oldBadNb = badNb;
2273 for ( int i = iBeg; i < iEnd; ++i )
2274 moved |= data._edges[i]->Smooth(badNb);
2275 improved = ( badNb < oldBadNb );
2282 for ( int i = iBeg; i < iEnd; ++i )
2284 _LayerEdge* edge = data._edges[i];
2285 SMESH_TNodeXYZ tgtXYZ( edge->_nodes.back() );
2286 for ( unsigned j = 0; j < edge->_simplices.size(); ++j )
2287 if ( !edge->_simplices[j].IsForward( edge->_nodes[0], &tgtXYZ ))
2289 cout << "Bad simplex ( " << edge->_nodes[0]->GetID()<< " "<< tgtXYZ._node->GetID()
2290 << " "<< edge->_simplices[j]._nPrev->GetID()
2291 << " "<< edge->_simplices[j]._nNext->GetID() << " )" << endl;
2299 } // loop on shapes to smooth
2301 // Check if the last segments of _LayerEdge intersects 2D elements;
2302 // checked elements are either temporary faces or faces on surfaces w/o the layers
2304 auto_ptr<SMESH_ElementSearcher> searcher
2305 ( SMESH_MeshAlgos::GetElementSearcher( *getMeshDS(),
2306 data._proxyMesh->GetFaces( data._solid )) );
2308 distToIntersection = Precision::Infinite();
2310 const SMDS_MeshElement* intFace = 0;
2312 const SMDS_MeshElement* closestFace = 0;
2315 for ( unsigned i = 0; i < data._edges.size(); ++i )
2317 if ( data._edges[i]->FindIntersection( *searcher, dist, data._epsilon, &intFace ))
2319 if ( distToIntersection > dist )
2321 distToIntersection = dist;
2324 closestFace = intFace;
2331 SMDS_MeshElement::iterator nIt = closestFace->begin_nodes();
2332 cout << "Shortest distance: _LayerEdge nodes: tgt " << data._edges[iLE]->_nodes.back()->GetID()
2333 << " src " << data._edges[iLE]->_nodes[0]->GetID()<< ", intersection with face ("
2334 << (*nIt++)->GetID()<<" "<< (*nIt++)->GetID()<<" "<< (*nIt++)->GetID()
2335 << ") distance = " << distToIntersection<< endl;
2342 //================================================================================
2344 * \brief Return a curve of the EDGE to be used for smoothing and arrange
2345 * _LayerEdge's to be in a consequent order
2347 //================================================================================
2349 Handle(Geom_Curve) _SolidData::CurveForSmooth( const TopoDS_Edge& E,
2352 Handle(Geom_Surface)& surface,
2353 const TopoDS_Face& F,
2354 SMESH_MesherHelper& helper)
2356 TGeomID eIndex = helper.GetMeshDS()->ShapeToIndex( E );
2358 map< TGeomID, Handle(Geom_Curve)>::iterator i2curve = _edge2curve.find( eIndex );
2360 if ( i2curve == _edge2curve.end() )
2362 // sort _LayerEdge's by position on the EDGE
2364 map< double, _LayerEdge* > u2edge;
2365 for ( int i = iFrom; i < iTo; ++i )
2366 u2edge.insert( make_pair( helper.GetNodeU( E, _edges[i]->_nodes[0] ), _edges[i] ));
2368 ASSERT( u2edge.size() == iTo - iFrom );
2369 map< double, _LayerEdge* >::iterator u2e = u2edge.begin();
2370 for ( int i = iFrom; i < iTo; ++i, ++u2e )
2371 _edges[i] = u2e->second;
2373 // set _2neibors according to the new order
2374 for ( int i = iFrom; i < iTo-1; ++i )
2375 if ( _edges[i]->_2neibors->_nodes[1] != _edges[i+1]->_nodes.back() )
2376 _edges[i]->_2neibors->reverse();
2377 if ( u2edge.size() > 1 &&
2378 _edges[iTo-1]->_2neibors->_nodes[0] != _edges[iTo-2]->_nodes.back() )
2379 _edges[iTo-1]->_2neibors->reverse();
2382 SMESHDS_SubMesh* smDS = helper.GetMeshDS()->MeshElements( eIndex );
2384 TopLoc_Location loc; double f,l;
2386 Handle(Geom_Line) line;
2387 Handle(Geom_Circle) circle;
2388 bool isLine, isCirc;
2389 if ( F.IsNull() ) // 3D case
2391 // check if the EDGE is a line
2392 Handle(Geom_Curve) curve = BRep_Tool::Curve( E, loc, f, l);
2393 if ( curve->IsKind( STANDARD_TYPE( Geom_TrimmedCurve )))
2394 curve = Handle(Geom_TrimmedCurve)::DownCast( curve )->BasisCurve();
2396 line = Handle(Geom_Line)::DownCast( curve );
2397 circle = Handle(Geom_Circle)::DownCast( curve );
2398 isLine = (!line.IsNull());
2399 isCirc = (!circle.IsNull());
2401 if ( !isLine && !isCirc ) // Check if the EDGE is close to a line
2404 SMDS_NodeIteratorPtr nIt = smDS->GetNodes();
2405 while ( nIt->more() )
2406 bndBox.Add( SMESH_TNodeXYZ( nIt->next() ));
2407 gp_XYZ size = bndBox.CornerMax() - bndBox.CornerMin();
2409 SMESH_TNodeXYZ p0( _edges[iFrom]->_2neibors->_nodes[0] );
2410 SMESH_TNodeXYZ p1( _edges[iFrom]->_2neibors->_nodes[1] );
2411 const double lineTol = 1e-2 * ( p0 - p1 ).Modulus();
2412 for ( int i = 0; i < 3 && !isLine; ++i )
2413 isLine = ( size.Coord( i+1 ) <= lineTol );
2415 if ( !isLine && !isCirc && iTo-iFrom > 2) // Check if the EDGE is close to a circle
2422 // check if the EDGE is a line
2423 Handle(Geom2d_Curve) curve = BRep_Tool::CurveOnSurface( E, F, f, l);
2424 if ( curve->IsKind( STANDARD_TYPE( Geom2d_TrimmedCurve )))
2425 curve = Handle(Geom2d_TrimmedCurve)::DownCast( curve )->BasisCurve();
2427 Handle(Geom2d_Line) line2d = Handle(Geom2d_Line)::DownCast( curve );
2428 Handle(Geom2d_Circle) circle2d = Handle(Geom2d_Circle)::DownCast( curve );
2429 isLine = (!line2d.IsNull());
2430 isCirc = (!circle2d.IsNull());
2432 if ( !isLine && !isCirc) // Check if the EDGE is close to a line
2435 SMDS_NodeIteratorPtr nIt = smDS->GetNodes();
2436 while ( nIt->more() )
2437 bndBox.Add( helper.GetNodeUV( F, nIt->next() ));
2438 gp_XY size = bndBox.CornerMax() - bndBox.CornerMin();
2440 const double lineTol = 1e-2 * sqrt( bndBox.SquareExtent() );
2441 for ( int i = 0; i < 2 && !isLine; ++i )
2442 isLine = ( size.Coord( i+1 ) <= lineTol );
2444 if ( !isLine && !isCirc && iTo-iFrom > 2) // Check if the EDGE is close to a circle
2450 line = new Geom_Line( gp::OX() ); // only type does matter
2454 gp_Pnt2d p = circle2d->Location();
2455 gp_Ax2 ax( gp_Pnt( p.X(), p.Y(), 0), gp::DX());
2456 circle = new Geom_Circle( ax, 1.); // only center position does matter
2460 Handle(Geom_Curve)& res = _edge2curve[ eIndex ];
2468 return i2curve->second;
2471 //================================================================================
2473 * \brief smooth _LayerEdge's on a staight EDGE or circular EDGE
2475 //================================================================================
2477 bool _ViscousBuilder::smoothAnalyticEdge( _SolidData& data,
2480 Handle(Geom_Surface)& surface,
2481 const TopoDS_Face& F,
2482 SMESH_MesherHelper& helper)
2484 TopoDS_Shape S = helper.GetSubShapeByNode( data._edges[ iFrom ]->_nodes[0],
2485 helper.GetMeshDS());
2486 TopoDS_Edge E = TopoDS::Edge( S );
2488 Handle(Geom_Curve) curve = data.CurveForSmooth( E, iFrom, iTo, surface, F, helper );
2489 if ( curve.IsNull() ) return false;
2491 // compute a relative length of segments
2492 vector< double > len( iTo-iFrom+1 );
2494 double curLen, prevLen = len[0] = 1.0;
2495 for ( int i = iFrom; i < iTo; ++i )
2497 curLen = prevLen * data._edges[i]->_2neibors->_wgt[0] / data._edges[i]->_2neibors->_wgt[1];
2498 len[i-iFrom+1] = len[i-iFrom] + curLen;
2503 if ( curve->IsKind( STANDARD_TYPE( Geom_Line )))
2505 if ( F.IsNull() ) // 3D
2507 SMESH_TNodeXYZ p0( data._edges[iFrom]->_2neibors->_nodes[0]);
2508 SMESH_TNodeXYZ p1( data._edges[iTo-1]->_2neibors->_nodes[1]);
2509 for ( int i = iFrom; i < iTo; ++i )
2511 double r = len[i-iFrom] / len.back();
2512 gp_XYZ newPos = p0 * ( 1. - r ) + p1 * r;
2513 data._edges[i]->_pos.back() = newPos;
2514 SMDS_MeshNode* tgtNode = const_cast<SMDS_MeshNode*>( data._edges[i]->_nodes.back() );
2515 tgtNode->setXYZ( newPos.X(), newPos.Y(), newPos.Z() );
2516 dumpMove( tgtNode );
2521 gp_XY uv0 = helper.GetNodeUV( F, data._edges[iFrom]->_2neibors->_nodes[0]);
2522 gp_XY uv1 = helper.GetNodeUV( F, data._edges[iTo-1]->_2neibors->_nodes[1]);
2523 if ( data._edges[iFrom]->_2neibors->_nodes[0] ==
2524 data._edges[iTo-1]->_2neibors->_nodes[1] ) // closed edge
2526 int iPeriodic = helper.GetPeriodicIndex();
2527 if ( iPeriodic == 1 || iPeriodic == 2 )
2529 uv1.SetCoord( iPeriodic, helper.GetOtherParam( uv1.Coord( iPeriodic )));
2530 if ( uv0.Coord( iPeriodic ) > uv1.Coord( iPeriodic ))
2531 std::swap( uv0, uv1 );
2534 const gp_XY rangeUV = uv1 - uv0;
2535 for ( int i = iFrom; i < iTo; ++i )
2537 double r = len[i-iFrom] / len.back();
2538 gp_XY newUV = uv0 + r * rangeUV;
2539 data._edges[i]->_pos.back().SetCoord( newUV.X(), newUV.Y(), 0 );
2541 gp_Pnt newPos = surface->Value( newUV.X(), newUV.Y() );
2542 SMDS_MeshNode* tgtNode = const_cast<SMDS_MeshNode*>( data._edges[i]->_nodes.back() );
2543 tgtNode->setXYZ( newPos.X(), newPos.Y(), newPos.Z() );
2544 dumpMove( tgtNode );
2546 SMDS_FacePosition* pos = static_cast<SMDS_FacePosition*>( tgtNode->GetPosition() );
2547 pos->SetUParameter( newUV.X() );
2548 pos->SetVParameter( newUV.Y() );
2554 if ( curve->IsKind( STANDARD_TYPE( Geom_Circle )))
2556 Handle(Geom_Circle) circle = Handle(Geom_Circle)::DownCast( curve );
2557 gp_Pnt center3D = circle->Location();
2559 if ( F.IsNull() ) // 3D
2561 if ( data._edges[iFrom]->_2neibors->_nodes[0] ==
2562 data._edges[iTo-1]->_2neibors->_nodes[1] )
2563 return true; // closed EDGE - nothing to do
2565 return false; // TODO ???
2569 const gp_XY center( center3D.X(), center3D.Y() );
2571 gp_XY uv0 = helper.GetNodeUV( F, data._edges[iFrom]->_2neibors->_nodes[0]);
2572 gp_XY uvM = helper.GetNodeUV( F, data._edges[iFrom]->_nodes.back());
2573 gp_XY uv1 = helper.GetNodeUV( F, data._edges[iTo-1]->_2neibors->_nodes[1]);
2574 gp_Vec2d vec0( center, uv0 );
2575 gp_Vec2d vecM( center, uvM );
2576 gp_Vec2d vec1( center, uv1 );
2577 double uLast = vec0.Angle( vec1 ); // -PI - +PI
2578 double uMidl = vec0.Angle( vecM );
2579 if ( uLast * uMidl < 0. )
2580 uLast += ( uMidl > 0 ? +2. : -2. ) * M_PI;
2581 const double radius = 0.5 * ( vec0.Magnitude() + vec1.Magnitude() );
2583 gp_Ax2d axis( center, vec0 );
2584 gp_Circ2d circ( axis, radius );
2585 for ( int i = iFrom; i < iTo; ++i )
2587 double newU = uLast * len[i-iFrom] / len.back();
2588 gp_Pnt2d newUV = ElCLib::Value( newU, circ );
2589 data._edges[i]->_pos.back().SetCoord( newUV.X(), newUV.Y(), 0 );
2591 gp_Pnt newPos = surface->Value( newUV.X(), newUV.Y() );
2592 SMDS_MeshNode* tgtNode = const_cast<SMDS_MeshNode*>( data._edges[i]->_nodes.back() );
2593 tgtNode->setXYZ( newPos.X(), newPos.Y(), newPos.Z() );
2594 dumpMove( tgtNode );
2596 SMDS_FacePosition* pos = static_cast<SMDS_FacePosition*>( tgtNode->GetPosition() );
2597 pos->SetUParameter( newUV.X() );
2598 pos->SetVParameter( newUV.Y() );
2607 //================================================================================
2609 * \brief Modify normals of _LayerEdge's on EDGE's to avoid intersection with
2610 * _LayerEdge's on neighbor EDGE's
2612 //================================================================================
2614 bool _ViscousBuilder::updateNormals( _SolidData& data,
2615 SMESH_MesherHelper& helper )
2617 // make temporary quadrangles got by extrusion of
2618 // mesh edges along _LayerEdge._normal's
2620 vector< const SMDS_MeshElement* > tmpFaces;
2622 set< SMESH_TLink > extrudedLinks; // contains target nodes
2623 vector< const SMDS_MeshNode*> nodes(4); // of a tmp mesh face
2625 dumpFunction(SMESH_Comment("makeTmpFacesOnEdges")<<data._index);
2626 for ( unsigned i = 0; i < data._edges.size(); ++i )
2628 _LayerEdge* edge = data._edges[i];
2629 if ( !edge->IsOnEdge() || !edge->_sWOL.IsNull() ) continue;
2630 const SMDS_MeshNode* tgt1 = edge->_nodes.back();
2631 for ( int j = 0; j < 2; ++j ) // loop on _2NearEdges
2633 const SMDS_MeshNode* tgt2 = edge->_2neibors->_nodes[j];
2634 pair< set< SMESH_TLink >::iterator, bool > link_isnew =
2635 extrudedLinks.insert( SMESH_TLink( tgt1, tgt2 ));
2636 if ( !link_isnew.second )
2638 extrudedLinks.erase( link_isnew.first );
2639 continue; // already extruded and will no more encounter
2641 // look for a _LayerEdge containg tgt2
2642 // _LayerEdge* neiborEdge = 0;
2643 // unsigned di = 0; // check _edges[i+di] and _edges[i-di]
2644 // while ( !neiborEdge && ++di <= data._edges.size() )
2646 // if ( i+di < data._edges.size() && data._edges[i+di]->_nodes.back() == tgt2 )
2647 // neiborEdge = data._edges[i+di];
2648 // else if ( di <= i && data._edges[i-di]->_nodes.back() == tgt2 )
2649 // neiborEdge = data._edges[i-di];
2651 // if ( !neiborEdge )
2652 // return error("updateNormals(): neighbor _LayerEdge not found", data._index);
2653 _LayerEdge* neiborEdge = edge->_2neibors->_edges[j];
2655 TmpMeshFaceOnEdge* f = new TmpMeshFaceOnEdge( edge, neiborEdge, --_tmpFaceID );
2656 tmpFaces.push_back( f );
2658 dumpCmd(SMESH_Comment("mesh.AddFace([ ")
2659 <<f->_nn[0]->GetID()<<", "<<f->_nn[1]->GetID()<<", "
2660 <<f->_nn[2]->GetID()<<", "<<f->_nn[3]->GetID()<<" ])");
2665 // Check if _LayerEdge's based on EDGE's intersects tmpFaces.
2666 // Perform two loops on _LayerEdge on EDGE's:
2667 // 1) to find and fix intersection
2668 // 2) to check that no new intersection appears as result of 1)
2670 SMDS_ElemIteratorPtr fIt( new SMDS_ElementVectorIterator( tmpFaces.begin(),
2672 auto_ptr<SMESH_ElementSearcher> searcher
2673 ( SMESH_MeshAlgos::GetElementSearcher( *getMeshDS(), fIt ));
2675 // 1) Find intersections
2677 const SMDS_MeshElement* face;
2678 typedef map< _LayerEdge*, set< _LayerEdge*, _LayerEdgeCmp >, _LayerEdgeCmp > TLEdge2LEdgeSet;
2679 TLEdge2LEdgeSet edge2CloseEdge;
2681 const double eps = data._epsilon * data._epsilon;
2682 for ( unsigned i = 0; i < data._edges.size(); ++i )
2684 _LayerEdge* edge = data._edges[i];
2685 if ( !edge->IsOnEdge() || !edge->_sWOL.IsNull() ) continue;
2686 if ( edge->FindIntersection( *searcher, dist, eps, &face ))
2688 const TmpMeshFaceOnEdge* f = (const TmpMeshFaceOnEdge*) face;
2689 set< _LayerEdge*, _LayerEdgeCmp > & ee = edge2CloseEdge[ edge ];
2690 ee.insert( f->_le1 );
2691 ee.insert( f->_le2 );
2692 if ( f->_le1->IsOnEdge() && f->_le1->_sWOL.IsNull() )
2693 edge2CloseEdge[ f->_le1 ].insert( edge );
2694 if ( f->_le2->IsOnEdge() && f->_le2->_sWOL.IsNull() )
2695 edge2CloseEdge[ f->_le2 ].insert( edge );
2699 // Set _LayerEdge._normal
2701 if ( !edge2CloseEdge.empty() )
2703 dumpFunction(SMESH_Comment("updateNormals")<<data._index);
2705 TLEdge2LEdgeSet::iterator e2ee = edge2CloseEdge.begin();
2706 for ( ; e2ee != edge2CloseEdge.end(); ++e2ee )
2708 _LayerEdge* edge1 = e2ee->first;
2709 _LayerEdge* edge2 = 0;
2710 set< _LayerEdge*, _LayerEdgeCmp >& ee = e2ee->second;
2712 // find EDGEs the edges reside
2714 TopoDS_Shape S = helper.GetSubShapeByNode( edge1->_nodes[0], getMeshDS() );
2715 if ( S.ShapeType() != TopAbs_EDGE )
2716 continue; // TODO: find EDGE by VERTEX
2717 E1 = TopoDS::Edge( S );
2718 set< _LayerEdge*, _LayerEdgeCmp >::iterator eIt = ee.begin();
2719 while ( E2.IsNull() && eIt != ee.end())
2721 _LayerEdge* e2 = *eIt++;
2722 TopoDS_Shape S = helper.GetSubShapeByNode( e2->_nodes[0], getMeshDS() );
2723 if ( S.ShapeType() == TopAbs_EDGE )
2724 E2 = TopoDS::Edge( S ), edge2 = e2;
2726 if ( E2.IsNull() ) continue; // TODO: find EDGE by VERTEX
2728 // find 3 FACEs sharing 2 EDGEs
2730 TopoDS_Face FF1[2], FF2[2];
2731 PShapeIteratorPtr fIt = helper.GetAncestors(E1, *_mesh, TopAbs_FACE);
2732 while ( fIt->more() && FF1[1].IsNull())
2734 const TopoDS_Face *F = (const TopoDS_Face*) fIt->next();
2735 if ( helper.IsSubShape( *F, data._solid))
2736 FF1[ FF1[0].IsNull() ? 0 : 1 ] = *F;
2738 fIt = helper.GetAncestors(E2, *_mesh, TopAbs_FACE);
2739 while ( fIt->more() && FF2[1].IsNull())
2741 const TopoDS_Face *F = (const TopoDS_Face*) fIt->next();
2742 if ( helper.IsSubShape( *F, data._solid))
2743 FF2[ FF2[0].IsNull() ? 0 : 1 ] = *F;
2745 // exclude a FACE common to E1 and E2 (put it at [1] in FF* )
2746 if ( FF1[0].IsSame( FF2[0]) || FF1[0].IsSame( FF2[1]))
2747 std::swap( FF1[0], FF1[1] );
2748 if ( FF2[0].IsSame( FF1[0]) )
2749 std::swap( FF2[0], FF2[1] );
2750 if ( FF1[0].IsNull() || FF2[0].IsNull() )
2753 // // get a new normal for edge1
2755 gp_Vec dir1 = edge1->_normal, dir2 = edge2->_normal;
2756 if ( edge1->_cosin < 0 )
2757 dir1 = getFaceDir( FF1[0], E1, edge1->_nodes[0], helper, ok ).Normalized();
2758 if ( edge2->_cosin < 0 )
2759 dir2 = getFaceDir( FF2[0], E2, edge2->_nodes[0], helper, ok ).Normalized();
2760 // gp_Vec dir1 = getFaceDir( FF1[0], E1, edge1->_nodes[0], helper, ok );
2761 // gp_Vec dir2 = getFaceDir( FF2[0], E2, edge2->_nodes[0], helper, ok2 );
2762 // double wgt1 = ( edge1->_cosin + 1 ) / ( edge1->_cosin + edge2->_cosin + 2 );
2763 // double wgt2 = ( edge2->_cosin + 1 ) / ( edge1->_cosin + edge2->_cosin + 2 );
2764 // gp_Vec newNorm = wgt1 * dir1 + wgt2 * dir2;
2765 // newNorm.Normalize();
2767 double wgt1 = ( edge1->_cosin + 1 ) / ( edge1->_cosin + edge2->_cosin + 2 );
2768 double wgt2 = ( edge2->_cosin + 1 ) / ( edge1->_cosin + edge2->_cosin + 2 );
2769 gp_Vec newNorm = wgt1 * dir1 + wgt2 * dir2;
2770 newNorm.Normalize();
2772 edge1->_normal = newNorm.XYZ();
2774 // update data of edge1 depending on _normal
2775 const SMDS_MeshNode *n1, *n2;
2776 n1 = edge1->_2neibors->_edges[0]->_nodes[0];
2777 n2 = edge1->_2neibors->_edges[1]->_nodes[0];
2778 //if ( !findNeiborsOnEdge( edge1, n1, n2, data ))
2780 edge1->SetDataByNeighbors( n1, n2, helper );
2782 if ( edge1->_cosin < 0 )
2785 getFaceDir( FF1[0], E1, edge1->_nodes[0], helper, ok );
2786 double angle = dir1.Angle( edge1->_normal ); // [0,PI]
2787 edge1->SetCosin( cos( angle ));
2789 // limit data._stepSize
2790 if ( edge1->_cosin > 0.1 )
2792 SMDS_ElemIteratorPtr fIt = edge1->_nodes[0]->GetInverseElementIterator(SMDSAbs_Face);
2793 while ( fIt->more() )
2794 limitStepSize( data, fIt->next(), edge1->_cosin );
2796 // set new XYZ of target node
2797 edge1->InvalidateStep( 1 );
2799 edge1->SetNewLength( data._stepSize, helper );
2802 // Update normals and other dependent data of not intersecting _LayerEdge's
2803 // neighboring the intersecting ones
2805 for ( e2ee = edge2CloseEdge.begin(); e2ee != edge2CloseEdge.end(); ++e2ee )
2807 _LayerEdge* edge1 = e2ee->first;
2808 if ( !edge1->_2neibors )
2810 for ( int j = 0; j < 2; ++j ) // loop on 2 neighbors
2812 _LayerEdge* neighbor = edge1->_2neibors->_edges[j];
2813 if ( edge2CloseEdge.count ( neighbor ))
2814 continue; // j-th neighbor is also intersected
2815 _LayerEdge* prevEdge = edge1;
2816 const int nbSteps = 6;
2817 for ( int step = nbSteps; step; --step ) // step from edge1 in j-th direction
2819 if ( !neighbor->_2neibors )
2820 break; // neighbor is on VERTEX
2822 _LayerEdge* nextEdge = neighbor->_2neibors->_edges[iNext];
2823 if ( nextEdge == prevEdge )
2824 nextEdge = neighbor->_2neibors->_edges[ ++iNext ];
2825 // const double& wgtPrev = neighbor->_2neibors->_wgt[1-iNext];
2826 // const double& wgtNext = neighbor->_2neibors->_wgt[iNext];
2827 double r = double(step-1)/nbSteps;
2828 if ( !nextEdge->_2neibors )
2831 gp_XYZ newNorm = prevEdge->_normal * r + nextEdge->_normal * (1-r);
2832 newNorm.Normalize();
2834 neighbor->_normal = newNorm;
2835 neighbor->SetCosin( prevEdge->_cosin * r + nextEdge->_cosin * (1-r) );
2836 neighbor->SetDataByNeighbors( prevEdge->_nodes[0], nextEdge->_nodes[0], helper );
2838 neighbor->InvalidateStep( 1 );
2840 neighbor->SetNewLength( data._stepSize, helper );
2842 // goto the next neighbor
2843 prevEdge = neighbor;
2844 neighbor = nextEdge;
2850 // 2) Check absence of intersections
2853 for ( unsigned i = 0 ; i < tmpFaces.size(); ++i )
2859 //================================================================================
2861 * \brief Looks for intersection of it's last segment with faces
2862 * \param distance - returns shortest distance from the last node to intersection
2864 //================================================================================
2866 bool _LayerEdge::FindIntersection( SMESH_ElementSearcher& searcher,
2868 const double& epsilon,
2869 const SMDS_MeshElement** face)
2871 vector< const SMDS_MeshElement* > suspectFaces;
2873 gp_Ax1 lastSegment = LastSegment(segLen);
2874 searcher.GetElementsNearLine( lastSegment, SMDSAbs_Face, suspectFaces );
2876 bool segmentIntersected = false;
2877 distance = Precision::Infinite();
2878 int iFace = -1; // intersected face
2879 for ( unsigned j = 0 ; j < suspectFaces.size() && !segmentIntersected; ++j )
2881 const SMDS_MeshElement* face = suspectFaces[j];
2882 if ( face->GetNodeIndex( _nodes.back() ) >= 0 ||
2883 face->GetNodeIndex( _nodes[0] ) >= 0 )
2884 continue; // face sharing _LayerEdge node
2885 const int nbNodes = face->NbCornerNodes();
2886 bool intFound = false;
2888 SMDS_MeshElement::iterator nIt = face->begin_nodes();
2891 intFound = SegTriaInter( lastSegment, *nIt++, *nIt++, *nIt++, dist, epsilon );
2895 const SMDS_MeshNode* tria[3];
2898 for ( int n2 = 2; n2 < nbNodes && !intFound; ++n2 )
2901 intFound = SegTriaInter(lastSegment, tria[0], tria[1], tria[2], dist, epsilon );
2907 if ( dist < segLen*(1.01) && dist > -(_len-segLen) )
2908 segmentIntersected = true;
2909 if ( distance > dist )
2910 distance = dist, iFace = j;
2913 if ( iFace != -1 && face ) *face = suspectFaces[iFace];
2914 // if ( distance && iFace > -1 )
2916 // // distance is used to limit size of inflation step which depends on
2917 // // whether the intersected face bears viscous layers or not
2918 // bool faceHasVL = suspectFaces[iFace]->GetID() < 1;
2922 if ( segmentIntersected )
2925 SMDS_MeshElement::iterator nIt = suspectFaces[iFace]->begin_nodes();
2926 gp_XYZ intP( lastSegment.Location().XYZ() + lastSegment.Direction().XYZ() * distance );
2927 cout << "nodes: tgt " << _nodes.back()->GetID() << " src " << _nodes[0]->GetID()
2928 << ", intersection with face ("
2929 << (*nIt++)->GetID()<<" "<< (*nIt++)->GetID()<<" "<< (*nIt++)->GetID()
2930 << ") at point (" << intP.X() << ", " << intP.Y() << ", " << intP.Z()
2931 << ") distance = " << distance - segLen<< endl;
2937 return segmentIntersected;
2940 //================================================================================
2942 * \brief Returns size and direction of the last segment
2944 //================================================================================
2946 gp_Ax1 _LayerEdge::LastSegment(double& segLen) const
2948 // find two non-coincident positions
2949 gp_XYZ orig = _pos.back();
2951 int iPrev = _pos.size() - 2;
2952 while ( iPrev >= 0 )
2954 dir = orig - _pos[iPrev];
2955 if ( dir.SquareModulus() > 1e-100 )
2965 segDir.SetLocation( SMESH_TNodeXYZ( _nodes[0] ));
2966 segDir.SetDirection( _normal );
2971 gp_Pnt pPrev = _pos[ iPrev ];
2972 if ( !_sWOL.IsNull() )
2974 TopLoc_Location loc;
2975 if ( _sWOL.ShapeType() == TopAbs_EDGE )
2978 Handle(Geom_Curve) curve = BRep_Tool::Curve( TopoDS::Edge( _sWOL ), loc, f,l);
2979 pPrev = curve->Value( pPrev.X() ).Transformed( loc );
2983 Handle(Geom_Surface) surface = BRep_Tool::Surface( TopoDS::Face(_sWOL), loc );
2984 pPrev = surface->Value( pPrev.X(), pPrev.Y() ).Transformed( loc );
2986 dir = SMESH_TNodeXYZ( _nodes.back() ) - pPrev.XYZ();
2988 segDir.SetLocation( pPrev );
2989 segDir.SetDirection( dir );
2990 segLen = dir.Modulus();
2996 //================================================================================
2998 * \brief Test intersection of the last segment with a given triangle
2999 * using Moller-Trumbore algorithm
3000 * Intersection is detected if distance to intersection is less than _LayerEdge._len
3002 //================================================================================
3004 bool _LayerEdge::SegTriaInter( const gp_Ax1& lastSegment,
3005 const SMDS_MeshNode* n0,
3006 const SMDS_MeshNode* n1,
3007 const SMDS_MeshNode* n2,
3009 const double& EPSILON) const
3011 //const double EPSILON = 1e-6;
3013 gp_XYZ orig = lastSegment.Location().XYZ();
3014 gp_XYZ dir = lastSegment.Direction().XYZ();
3016 SMESH_TNodeXYZ vert0( n0 );
3017 SMESH_TNodeXYZ vert1( n1 );
3018 SMESH_TNodeXYZ vert2( n2 );
3020 /* calculate distance from vert0 to ray origin */
3021 gp_XYZ tvec = orig - vert0;
3023 if ( tvec * dir > EPSILON )
3024 // intersected face is at back side of the temporary face this _LayerEdge belongs to
3027 gp_XYZ edge1 = vert1 - vert0;
3028 gp_XYZ edge2 = vert2 - vert0;
3030 /* begin calculating determinant - also used to calculate U parameter */
3031 gp_XYZ pvec = dir ^ edge2;
3033 /* if determinant is near zero, ray lies in plane of triangle */
3034 double det = edge1 * pvec;
3036 if (det > -EPSILON && det < EPSILON)
3038 double inv_det = 1.0 / det;
3040 /* calculate U parameter and test bounds */
3041 double u = ( tvec * pvec ) * inv_det;
3042 if (u < 0.0 || u > 1.0)
3045 /* prepare to test V parameter */
3046 gp_XYZ qvec = tvec ^ edge1;
3048 /* calculate V parameter and test bounds */
3049 double v = (dir * qvec) * inv_det;
3050 if ( v < 0.0 || u + v > 1.0 )
3053 /* calculate t, ray intersects triangle */
3054 t = (edge2 * qvec) * inv_det;
3056 // if (det < EPSILON)
3059 // /* calculate distance from vert0 to ray origin */
3060 // gp_XYZ tvec = orig - vert0;
3062 // /* calculate U parameter and test bounds */
3063 // double u = tvec * pvec;
3064 // if (u < 0.0 || u > det)
3067 // /* prepare to test V parameter */
3068 // gp_XYZ qvec = tvec ^ edge1;
3070 // /* calculate V parameter and test bounds */
3071 // double v = dir * qvec;
3072 // if (v < 0.0 || u + v > det)
3075 // /* calculate t, scale parameters, ray intersects triangle */
3076 // double t = edge2 * qvec;
3077 // double inv_det = 1.0 / det;
3085 //================================================================================
3087 * \brief Perform smooth of _LayerEdge's based on EDGE's
3088 * \retval bool - true if node has been moved
3090 //================================================================================
3092 bool _LayerEdge::SmoothOnEdge(Handle(Geom_Surface)& surface,
3093 const TopoDS_Face& F,
3094 SMESH_MesherHelper& helper)
3096 ASSERT( IsOnEdge() );
3098 SMDS_MeshNode* tgtNode = const_cast<SMDS_MeshNode*>( _nodes.back() );
3099 SMESH_TNodeXYZ oldPos( tgtNode );
3100 double dist01, distNewOld;
3102 SMESH_TNodeXYZ p0( _2neibors->_nodes[0]);
3103 SMESH_TNodeXYZ p1( _2neibors->_nodes[1]);
3104 dist01 = p0.Distance( _2neibors->_nodes[1] );
3106 gp_Pnt newPos = p0 * _2neibors->_wgt[0] + p1 * _2neibors->_wgt[1];
3107 double lenDelta = 0;
3110 //lenDelta = _curvature->lenDelta( _len );
3111 lenDelta = _curvature->lenDeltaByDist( dist01 );
3112 newPos.ChangeCoord() += _normal * lenDelta;
3115 distNewOld = newPos.Distance( oldPos );
3119 if ( _2neibors->_plnNorm )
3121 // put newPos on the plane defined by source node and _plnNorm
3122 gp_XYZ new2src = SMESH_TNodeXYZ( _nodes[0] ) - newPos.XYZ();
3123 double new2srcProj = (*_2neibors->_plnNorm) * new2src;
3124 newPos.ChangeCoord() += (*_2neibors->_plnNorm) * new2srcProj;
3126 tgtNode->setXYZ( newPos.X(), newPos.Y(), newPos.Z() );
3127 _pos.back() = newPos.XYZ();
3131 tgtNode->setXYZ( newPos.X(), newPos.Y(), newPos.Z() );
3132 gp_XY uv( Precision::Infinite(), 0 );
3133 helper.CheckNodeUV( F, tgtNode, uv, 1e-10, /*force=*/true );
3134 _pos.back().SetCoord( uv.X(), uv.Y(), 0 );
3136 newPos = surface->Value( uv.X(), uv.Y() );
3137 tgtNode->setXYZ( newPos.X(), newPos.Y(), newPos.Z() );
3140 if ( _curvature && lenDelta < 0 )
3142 gp_Pnt prevPos( _pos[ _pos.size()-2 ]);
3143 _len -= prevPos.Distance( oldPos );
3144 _len += prevPos.Distance( newPos );
3146 bool moved = distNewOld > dist01/50;
3148 dumpMove( tgtNode ); // debug
3153 //================================================================================
3155 * \brief Perform laplacian smooth in 3D of nodes inflated from FACE
3156 * \retval bool - true if _tgtNode has been moved
3158 //================================================================================
3160 bool _LayerEdge::Smooth(int& badNb)
3162 if ( _simplices.size() < 2 )
3163 return false; // _LayerEdge inflated along EDGE or FACE
3165 // compute new position for the last _pos
3166 gp_XYZ newPos (0,0,0);
3167 for ( unsigned i = 0; i < _simplices.size(); ++i )
3168 newPos += SMESH_TNodeXYZ( _simplices[i]._nPrev );
3169 newPos /= _simplices.size();
3172 newPos += _normal * _curvature->lenDelta( _len );
3174 gp_Pnt prevPos( _pos[ _pos.size()-2 ]);
3175 // if ( _cosin < -0.1)
3177 // // Avoid decreasing length of edge on concave surface
3178 // //gp_Vec oldMove( _pos[ _pos.size()-2 ], _pos.back() );
3179 // gp_Vec newMove( prevPos, newPos );
3180 // newPos = _pos.back() + newMove.XYZ();
3182 // else if ( _cosin > 0.3 )
3184 // // Avoid increasing length of edge too much
3187 // count quality metrics (orientation) of tetras around _tgtNode
3189 SMESH_TNodeXYZ tgtXYZ( _nodes.back() );
3190 for ( unsigned i = 0; i < _simplices.size(); ++i )
3191 nbOkBefore += _simplices[i].IsForward( _nodes[0], &tgtXYZ );
3194 for ( unsigned i = 0; i < _simplices.size(); ++i )
3195 nbOkAfter += _simplices[i].IsForward( _nodes[0], &newPos );
3197 if ( nbOkAfter < nbOkBefore )
3200 SMDS_MeshNode* n = const_cast< SMDS_MeshNode* >( _nodes.back() );
3202 _len -= prevPos.Distance(SMESH_TNodeXYZ( n ));
3203 _len += prevPos.Distance(newPos);
3205 n->setXYZ( newPos.X(), newPos.Y(), newPos.Z());
3206 _pos.back() = newPos;
3208 badNb += _simplices.size() - nbOkAfter;
3215 //================================================================================
3217 * \brief Add a new segment to _LayerEdge during inflation
3219 //================================================================================
3221 void _LayerEdge::SetNewLength( double len, SMESH_MesherHelper& helper )
3223 if ( _len - len > -1e-6 )
3225 _pos.push_back( _pos.back() );
3229 SMDS_MeshNode* n = const_cast< SMDS_MeshNode*>( _nodes.back() );
3230 SMESH_TNodeXYZ oldXYZ( n );
3231 gp_XYZ nXYZ = oldXYZ + _normal * ( len - _len ) * _lenFactor;
3232 n->setXYZ( nXYZ.X(), nXYZ.Y(), nXYZ.Z() );
3234 _pos.push_back( nXYZ );
3236 if ( !_sWOL.IsNull() )
3239 if ( _sWOL.ShapeType() == TopAbs_EDGE )
3241 double u = Precision::Infinite(); // to force projection w/o distance check
3242 helper.CheckNodeU( TopoDS::Edge( _sWOL ), n, u, 1e-10, /*force=*/true, distXYZ );
3243 _pos.back().SetCoord( u, 0, 0 );
3244 SMDS_EdgePosition* pos = static_cast<SMDS_EdgePosition*>( n->GetPosition() );
3245 pos->SetUParameter( u );
3249 gp_XY uv( Precision::Infinite(), 0 );
3250 helper.CheckNodeUV( TopoDS::Face( _sWOL ), n, uv, 1e-10, /*force=*/true, distXYZ );
3251 _pos.back().SetCoord( uv.X(), uv.Y(), 0 );
3252 SMDS_FacePosition* pos = static_cast<SMDS_FacePosition*>( n->GetPosition() );
3253 pos->SetUParameter( uv.X() );
3254 pos->SetVParameter( uv.Y() );
3256 n->setXYZ( distXYZ[1], distXYZ[2], distXYZ[3]);
3258 dumpMove( n ); //debug
3261 //================================================================================
3263 * \brief Remove last inflation step
3265 //================================================================================
3267 void _LayerEdge::InvalidateStep( int curStep )
3269 if ( _pos.size() > curStep )
3271 _pos.resize( curStep );
3272 gp_Pnt nXYZ = _pos.back();
3273 SMDS_MeshNode* n = const_cast< SMDS_MeshNode*>( _nodes.back() );
3274 if ( !_sWOL.IsNull() )
3276 TopLoc_Location loc;
3277 if ( _sWOL.ShapeType() == TopAbs_EDGE )
3279 SMDS_EdgePosition* pos = static_cast<SMDS_EdgePosition*>( n->GetPosition() );
3280 pos->SetUParameter( nXYZ.X() );
3282 Handle(Geom_Curve) curve = BRep_Tool::Curve( TopoDS::Edge( _sWOL ), loc, f,l);
3283 nXYZ = curve->Value( nXYZ.X() ).Transformed( loc );
3287 SMDS_FacePosition* pos = static_cast<SMDS_FacePosition*>( n->GetPosition() );
3288 pos->SetUParameter( nXYZ.X() );
3289 pos->SetVParameter( nXYZ.Y() );
3290 Handle(Geom_Surface) surface = BRep_Tool::Surface( TopoDS::Face(_sWOL), loc );
3291 nXYZ = surface->Value( nXYZ.X(), nXYZ.Y() ).Transformed( loc );
3294 n->setXYZ( nXYZ.X(), nXYZ.Y(), nXYZ.Z() );
3299 //================================================================================
3301 * \brief Create layers of prisms
3303 //================================================================================
3305 bool _ViscousBuilder::refine(_SolidData& data)
3307 SMESH_MesherHelper helper( *_mesh );
3308 helper.SetSubShape( data._solid );
3309 helper.SetElementsOnShape(false);
3311 Handle(Geom_Curve) curve;
3312 Handle(Geom_Surface) surface;
3313 TopoDS_Edge geomEdge;
3314 TopoDS_Face geomFace;
3315 TopLoc_Location loc;
3316 double f,l, u/*, distXYZ[4]*/;
3320 for ( unsigned i = 0; i < data._edges.size(); ++i )
3322 _LayerEdge& edge = *data._edges[i];
3324 // get accumulated length of segments
3325 vector< double > segLen( edge._pos.size() );
3327 for ( unsigned j = 1; j < edge._pos.size(); ++j )
3328 segLen[j] = segLen[j-1] + (edge._pos[j-1] - edge._pos[j] ).Modulus();
3330 // allocate memory for new nodes if it is not yet refined
3331 const SMDS_MeshNode* tgtNode = edge._nodes.back();
3332 if ( edge._nodes.size() == 2 )
3334 edge._nodes.resize( data._hyp->GetNumberLayers() + 1, 0 );
3336 edge._nodes.back() = tgtNode;
3338 if ( !edge._sWOL.IsNull() )
3340 isOnEdge = ( edge._sWOL.ShapeType() == TopAbs_EDGE );
3341 // restore position of the last node
3345 geomEdge = TopoDS::Edge( edge._sWOL );
3346 curve = BRep_Tool::Curve( geomEdge, loc, f,l);
3347 // double u = helper.GetNodeU( tgtNode );
3348 // p = curve->Value( u );
3352 geomFace = TopoDS::Face( edge._sWOL );
3353 surface = BRep_Tool::Surface( geomFace, loc );
3354 // gp_XY uv = helper.GetNodeUV( tgtNode );
3355 // p = surface->Value( uv.X(), uv.Y() );
3357 // p.Transform( loc );
3358 // const_cast< SMDS_MeshNode* >( tgtNode )->setXYZ( p.X(), p.Y(), p.Z() );
3360 // calculate height of the first layer
3362 const double T = segLen.back(); //data._hyp.GetTotalThickness();
3363 const double f = data._hyp->GetStretchFactor();
3364 const int N = data._hyp->GetNumberLayers();
3365 const double fPowN = pow( f, N );
3366 if ( fPowN - 1 <= numeric_limits<double>::min() )
3369 h0 = T * ( f - 1 )/( fPowN - 1 );
3371 const double zeroLen = std::numeric_limits<double>::min();
3373 // create intermediate nodes
3374 double hSum = 0, hi = h0/f;
3376 for ( unsigned iStep = 1; iStep < edge._nodes.size(); ++iStep )
3378 // compute an intermediate position
3381 while ( hSum > segLen[iSeg] && iSeg < segLen.size()-1)
3383 int iPrevSeg = iSeg-1;
3384 while ( fabs( segLen[iPrevSeg] - segLen[iSeg]) <= zeroLen && iPrevSeg > 0 )
3386 double r = ( segLen[iSeg] - hSum ) / ( segLen[iSeg] - segLen[iPrevSeg] );
3387 gp_Pnt pos = r * edge._pos[iPrevSeg] + (1-r) * edge._pos[iSeg];
3389 SMDS_MeshNode*& node = const_cast< SMDS_MeshNode*& >(edge._nodes[ iStep ]);
3390 if ( !edge._sWOL.IsNull() )
3392 // compute XYZ by parameters <pos>
3396 pos = curve->Value( u ).Transformed(loc);
3400 uv.SetCoord( pos.X(), pos.Y() );
3401 pos = surface->Value( pos.X(), pos.Y() ).Transformed(loc);
3404 // create or update the node
3407 node = helper.AddNode( pos.X(), pos.Y(), pos.Z());
3408 if ( !edge._sWOL.IsNull() )
3411 getMeshDS()->SetNodeOnEdge( node, geomEdge, u );
3413 getMeshDS()->SetNodeOnFace( node, geomFace, uv.X(), uv.Y() );
3417 getMeshDS()->SetNodeInVolume( node, helper.GetSubShapeID() );
3422 if ( !edge._sWOL.IsNull() )
3424 // make average pos from new and current parameters
3427 u = 0.5 * ( u + helper.GetNodeU( geomEdge, node ));
3428 pos = curve->Value( u ).Transformed(loc);
3432 uv = 0.5 * ( uv + helper.GetNodeUV( geomFace, node ));
3433 pos = surface->Value( uv.X(), uv.Y()).Transformed(loc);
3436 node->setXYZ( pos.X(), pos.Y(), pos.Z() );
3441 if ( !getMeshDS()->IsEmbeddedMode() )
3442 // Log node movement
3443 for ( unsigned i = 0; i < data._edges.size(); ++i )
3445 _LayerEdge& edge = *data._edges[i];
3446 SMESH_TNodeXYZ p ( edge._nodes.back() );
3447 getMeshDS()->MoveNode( p._node, p.X(), p.Y(), p.Z() );
3450 // TODO: make quadratic prisms and polyhedrons(?)
3452 helper.SetElementsOnShape(true);
3454 TopExp_Explorer exp( data._solid, TopAbs_FACE );
3455 for ( ; exp.More(); exp.Next() )
3457 if ( _ignoreShapeIds.count( getMeshDS()->ShapeToIndex( exp.Current() )))
3459 SMESHDS_SubMesh* fSubM = getMeshDS()->MeshElements( exp.Current() );
3460 SMDS_ElemIteratorPtr fIt = fSubM->GetElements();
3461 vector< vector<const SMDS_MeshNode*>* > nnVec;
3462 while ( fIt->more() )
3464 const SMDS_MeshElement* face = fIt->next();
3465 int nbNodes = face->NbCornerNodes();
3466 nnVec.resize( nbNodes );
3467 SMDS_ElemIteratorPtr nIt = face->nodesIterator();
3468 for ( int iN = 0; iN < nbNodes; ++iN )
3470 const SMDS_MeshNode* n = static_cast<const SMDS_MeshNode*>( nIt->next() );
3471 nnVec[ iN ] = & data._n2eMap[ n ]->_nodes;
3474 int nbZ = nnVec[0]->size();
3478 for ( int iZ = 1; iZ < nbZ; ++iZ )
3479 helper.AddVolume( (*nnVec[0])[iZ-1], (*nnVec[1])[iZ-1], (*nnVec[2])[iZ-1],
3480 (*nnVec[0])[iZ], (*nnVec[1])[iZ], (*nnVec[2])[iZ]);
3483 for ( int iZ = 1; iZ < nbZ; ++iZ )
3484 helper.AddVolume( (*nnVec[0])[iZ-1], (*nnVec[1])[iZ-1],
3485 (*nnVec[2])[iZ-1], (*nnVec[3])[iZ-1],
3486 (*nnVec[0])[iZ], (*nnVec[1])[iZ],
3487 (*nnVec[2])[iZ], (*nnVec[3])[iZ]);
3490 return error("Not supported type of element", data._index);
3497 //================================================================================
3499 * \brief Shrink 2D mesh on faces to let space for inflated layers
3501 //================================================================================
3503 bool _ViscousBuilder::shrink()
3505 // make map of (ids of FACEs to shrink mesh on) to (_SolidData containing _LayerEdge's
3506 // inflated along FACE or EDGE)
3507 map< TGeomID, _SolidData* > f2sdMap;
3508 for ( unsigned i = 0 ; i < _sdVec.size(); ++i )
3510 _SolidData& data = _sdVec[i];
3511 TopTools_MapOfShape FFMap;
3512 map< TGeomID, TopoDS_Shape >::iterator s2s = data._shrinkShape2Shape.begin();
3513 for (; s2s != data._shrinkShape2Shape.end(); ++s2s )
3514 if ( s2s->second.ShapeType() == TopAbs_FACE )
3516 f2sdMap.insert( make_pair( getMeshDS()->ShapeToIndex( s2s->second ), &data ));
3518 if ( FFMap.Add( (*s2s).second ))
3519 // Put mesh faces on the shrinked FACE to the proxy sub-mesh to avoid
3520 // usage of mesh faces made in addBoundaryElements() by the 3D algo or
3521 // by StdMeshers_QuadToTriaAdaptor
3522 if ( SMESHDS_SubMesh* smDS = getMeshDS()->MeshElements( s2s->second ))
3524 SMESH_ProxyMesh::SubMesh* proxySub =
3525 data._proxyMesh->getFaceSubM( TopoDS::Face( s2s->second ), /*create=*/true);
3526 SMDS_ElemIteratorPtr fIt = smDS->GetElements();
3527 while ( fIt->more() )
3528 proxySub->AddElement( fIt->next() );
3529 // as a result 3D algo will use elements from proxySub and not from smDS
3534 SMESH_MesherHelper helper( *_mesh );
3535 helper.ToFixNodeParameters( true );
3538 map< TGeomID, _Shrinker1D > e2shrMap;
3540 // loop on FACES to srink mesh on
3541 map< TGeomID, _SolidData* >::iterator f2sd = f2sdMap.begin();
3542 for ( ; f2sd != f2sdMap.end(); ++f2sd )
3544 _SolidData& data = *f2sd->second;
3545 TNode2Edge& n2eMap = data._n2eMap;
3546 const TopoDS_Face& F = TopoDS::Face( getMeshDS()->IndexToShape( f2sd->first ));
3548 Handle(Geom_Surface) surface = BRep_Tool::Surface(F);
3550 SMESH_subMesh* sm = _mesh->GetSubMesh( F );
3551 SMESHDS_SubMesh* smDS = sm->GetSubMeshDS();
3553 helper.SetSubShape(F);
3555 // ===========================
3556 // Prepare data for shrinking
3557 // ===========================
3559 // Collect nodes to smooth, as src nodes are not yet replaced by tgt ones
3560 // and thus all nodes on a FACE connected to 2d elements are to be smoothed
3561 vector < const SMDS_MeshNode* > smoothNodes;
3563 SMDS_NodeIteratorPtr nIt = smDS->GetNodes();
3564 while ( nIt->more() )
3566 const SMDS_MeshNode* n = nIt->next();
3567 if ( n->NbInverseElements( SMDSAbs_Face ) > 0 )
3568 smoothNodes.push_back( n );
3571 // Find out face orientation
3573 const set<TGeomID> ignoreShapes;
3575 if ( !smoothNodes.empty() )
3577 vector<_Simplex> simplices;
3578 getSimplices( smoothNodes[0], simplices, ignoreShapes );
3579 helper.GetNodeUV( F, simplices[0]._nPrev, 0, &isOkUV ); // fix UV of silpmex nodes
3580 helper.GetNodeUV( F, simplices[0]._nNext, 0, &isOkUV );
3581 gp_XY uv = helper.GetNodeUV( F, smoothNodes[0], 0, &isOkUV );
3582 if ( !simplices[0].IsForward(uv, smoothNodes[0], F, helper,refSign) )
3586 // Find _LayerEdge's inflated along F
3587 vector< _LayerEdge* > lEdges;
3589 SMESH_subMeshIteratorPtr subIt =
3590 sm->getDependsOnIterator(/*includeSelf=*/false, /*complexShapeFirst=*/false);
3591 while ( subIt->more() )
3593 SMESH_subMesh* sub = subIt->next();
3594 SMESHDS_SubMesh* subDS = sub->GetSubMeshDS();
3595 if ( subDS->NbNodes() == 0 || !n2eMap.count( subDS->GetNodes()->next() ))
3597 SMDS_NodeIteratorPtr nIt = subDS->GetNodes();
3598 while ( nIt->more() )
3600 _LayerEdge* edge = n2eMap[ nIt->next() ];
3601 lEdges.push_back( edge );
3602 prepareEdgeToShrink( *edge, F, helper, smDS );
3607 // Replace source nodes by target nodes in mesh faces to shrink
3608 const SMDS_MeshNode* nodes[20];
3609 for ( unsigned i = 0; i < lEdges.size(); ++i )
3611 _LayerEdge& edge = *lEdges[i];
3612 const SMDS_MeshNode* srcNode = edge._nodes[0];
3613 const SMDS_MeshNode* tgtNode = edge._nodes.back();
3614 SMDS_ElemIteratorPtr fIt = srcNode->GetInverseElementIterator(SMDSAbs_Face);
3615 while ( fIt->more() )
3617 const SMDS_MeshElement* f = fIt->next();
3618 if ( !smDS->Contains( f ))
3620 SMDS_ElemIteratorPtr nIt = f->nodesIterator();
3621 for ( int iN = 0; iN < f->NbNodes(); ++iN )
3623 const SMDS_MeshNode* n = static_cast<const SMDS_MeshNode*>( nIt->next() );
3624 nodes[iN] = ( n == srcNode ? tgtNode : n );
3626 helper.GetMeshDS()->ChangeElementNodes( f, nodes, f->NbNodes() );
3630 // find out if a FACE is concave
3631 const bool isConcaveFace = isConcave( F, helper );
3633 // Create _SmoothNode's on face F
3634 vector< _SmoothNode > nodesToSmooth( smoothNodes.size() );
3636 dumpFunction(SMESH_Comment("beforeShrinkFace")<<f2sd->first); // debug
3637 const bool sortSimplices = isConcaveFace;
3638 for ( unsigned i = 0; i < smoothNodes.size(); ++i )
3640 const SMDS_MeshNode* n = smoothNodes[i];
3641 nodesToSmooth[ i ]._node = n;
3642 // src nodes must be replaced by tgt nodes to have tgt nodes in _simplices
3643 getSimplices( n, nodesToSmooth[ i ]._simplices, ignoreShapes, NULL, sortSimplices );
3644 // fix up incorrect uv of nodes on the FACE
3645 helper.GetNodeUV( F, n, 0, &isOkUV);
3650 //if ( nodesToSmooth.empty() ) continue;
3652 // Find EDGE's to shrink
3653 set< _Shrinker1D* > eShri1D;
3655 for ( unsigned i = 0; i < lEdges.size(); ++i )
3657 _LayerEdge* edge = lEdges[i];
3658 if ( edge->_sWOL.ShapeType() == TopAbs_EDGE )
3660 TGeomID edgeIndex = getMeshDS()->ShapeToIndex( edge->_sWOL );
3661 _Shrinker1D& srinker = e2shrMap[ edgeIndex ];
3662 eShri1D.insert( & srinker );
3663 srinker.AddEdge( edge, helper );
3664 VISCOUS_3D::ToClearSubWithMain( _mesh->GetSubMesh( edge->_sWOL ), data._solid );
3665 // restore params of nodes on EGDE if the EDGE has been already
3666 // srinked while srinking another FACE
3667 srinker.RestoreParams();
3672 // ==================
3673 // Perform shrinking
3674 // ==================
3676 bool shrinked = true;
3677 int badNb, shriStep=0, smooStep=0;
3678 _SmoothNode::SmoothType smoothType
3679 = isConcaveFace ? _SmoothNode::CENTROIDAL : _SmoothNode::LAPLACIAN;
3683 // Move boundary nodes (actually just set new UV)
3684 // -----------------------------------------------
3685 dumpFunction(SMESH_Comment("moveBoundaryOnF")<<f2sd->first<<"_st"<<shriStep ); // debug
3687 for ( unsigned i = 0; i < lEdges.size(); ++i )
3689 shrinked |= lEdges[i]->SetNewLength2d( surface,F,helper );
3693 // Move nodes on EDGE's
3694 // (XYZ is set as soon as a needed length reached in SetNewLength2d())
3695 set< _Shrinker1D* >::iterator shr = eShri1D.begin();
3696 for ( ; shr != eShri1D.end(); ++shr )
3697 (*shr)->Compute( /*set3D=*/false, helper );
3700 // -----------------
3701 int nbNoImpSteps = 0;
3704 while (( nbNoImpSteps < 5 && badNb > 0) && moved)
3706 dumpFunction(SMESH_Comment("shrinkFace")<<f2sd->first<<"_st"<<++smooStep); // debug
3708 int oldBadNb = badNb;
3711 for ( unsigned i = 0; i < nodesToSmooth.size(); ++i )
3713 moved |= nodesToSmooth[i].Smooth( badNb,surface,helper,refSign,
3714 smoothType, /*set3D=*/isConcaveFace);
3716 if ( badNb < oldBadNb )
3724 return error(SMESH_Comment("Can't shrink 2D mesh on face ") << f2sd->first );
3725 if ( shriStep > 200 )
3726 return error(SMESH_Comment("Infinite loop at shrinking 2D mesh on face ") << f2sd->first );
3729 // No wrongly shaped faces remain; final smooth. Set node XYZ.
3730 bool isStructuredFixed = false;
3731 if ( SMESH_2D_Algo* algo = dynamic_cast<SMESH_2D_Algo*>( sm->GetAlgo() ))
3732 isStructuredFixed = algo->FixInternalNodes( *data._proxyMesh, F );
3733 if ( !isStructuredFixed )
3735 if ( isConcaveFace )
3736 fixBadFaces( F, helper ); // fix narrow faces by swapping diagonals
3737 for ( int st = /*highQuality ? 10 :*/ 3; st; --st )
3739 dumpFunction(SMESH_Comment("shrinkFace")<<f2sd->first<<"_st"<<++smooStep); // debug
3740 for ( unsigned i = 0; i < nodesToSmooth.size(); ++i )
3742 nodesToSmooth[i].Smooth( badNb,surface,helper,refSign,
3743 smoothType,/*set3D=*/st==1 );
3748 // Set an event listener to clear FACE sub-mesh together with SOLID sub-mesh
3749 VISCOUS_3D::ToClearSubWithMain( sm, data._solid );
3751 if ( !getMeshDS()->IsEmbeddedMode() )
3752 // Log node movement
3753 for ( unsigned i = 0; i < nodesToSmooth.size(); ++i )
3755 SMESH_TNodeXYZ p ( nodesToSmooth[i]._node );
3756 getMeshDS()->MoveNode( nodesToSmooth[i]._node, p.X(), p.Y(), p.Z() );
3759 } // loop on FACES to srink mesh on
3762 // Replace source nodes by target nodes in shrinked mesh edges
3764 map< int, _Shrinker1D >::iterator e2shr = e2shrMap.begin();
3765 for ( ; e2shr != e2shrMap.end(); ++e2shr )
3766 e2shr->second.SwapSrcTgtNodes( getMeshDS() );
3771 //================================================================================
3773 * \brief Computes 2d shrink direction and finds nodes limiting shrinking
3775 //================================================================================
3777 bool _ViscousBuilder::prepareEdgeToShrink( _LayerEdge& edge,
3778 const TopoDS_Face& F,
3779 SMESH_MesherHelper& helper,
3780 const SMESHDS_SubMesh* faceSubMesh)
3782 const SMDS_MeshNode* srcNode = edge._nodes[0];
3783 const SMDS_MeshNode* tgtNode = edge._nodes.back();
3787 if ( edge._sWOL.ShapeType() == TopAbs_FACE )
3789 gp_XY srcUV = helper.GetNodeUV( F, srcNode );
3790 gp_XY tgtUV = helper.GetNodeUV( F, tgtNode );
3791 gp_Vec2d uvDir( srcUV, tgtUV );
3792 double uvLen = uvDir.Magnitude();
3794 edge._normal.SetCoord( uvDir.X(),uvDir.Y(), 0);
3797 // IMPORTANT to have src nodes NOT yet REPLACED by tgt nodes in shrinked faces
3798 vector<const SMDS_MeshElement*> faces;
3799 multimap< double, const SMDS_MeshNode* > proj2node;
3800 SMDS_ElemIteratorPtr fIt = srcNode->GetInverseElementIterator(SMDSAbs_Face);
3801 while ( fIt->more() )
3803 const SMDS_MeshElement* f = fIt->next();
3804 if ( faceSubMesh->Contains( f ))
3805 faces.push_back( f );
3807 for ( unsigned i = 0; i < faces.size(); ++i )
3809 const int nbNodes = faces[i]->NbCornerNodes();
3810 for ( int j = 0; j < nbNodes; ++j )
3812 const SMDS_MeshNode* n = faces[i]->GetNode(j);
3813 if ( n == srcNode ) continue;
3814 if ( n->GetPosition()->GetTypeOfPosition() != SMDS_TOP_FACE &&
3815 ( faces.size() > 1 || nbNodes > 3 ))
3817 gp_Pnt2d uv = helper.GetNodeUV( F, n );
3818 gp_Vec2d uvDirN( srcUV, uv );
3819 double proj = uvDirN * uvDir;
3820 proj2node.insert( make_pair( proj, n ));
3824 multimap< double, const SMDS_MeshNode* >::iterator p2n = proj2node.begin(), p2nEnd;
3825 const double minProj = p2n->first;
3826 const double projThreshold = 1.1 * uvLen;
3827 if ( minProj > projThreshold )
3829 // tgtNode is located so that it does not make faces with wrong orientation
3832 edge._pos.resize(1);
3833 edge._pos[0].SetCoord( tgtUV.X(), tgtUV.Y(), 0 );
3835 // store most risky nodes in _simplices
3836 p2nEnd = proj2node.lower_bound( projThreshold );
3837 int nbSimpl = ( std::distance( p2n, p2nEnd ) + 1) / 2;
3838 edge._simplices.resize( nbSimpl );
3839 for ( int i = 0; i < nbSimpl; ++i )
3841 edge._simplices[i]._nPrev = p2n->second;
3842 if ( ++p2n != p2nEnd )
3843 edge._simplices[i]._nNext = p2n->second;
3845 // set UV of source node to target node
3846 SMDS_FacePosition* pos = static_cast<SMDS_FacePosition*>( tgtNode->GetPosition() );
3847 pos->SetUParameter( srcUV.X() );
3848 pos->SetVParameter( srcUV.Y() );
3850 else // _sWOL is TopAbs_EDGE
3852 TopoDS_Edge E = TopoDS::Edge( edge._sWOL);
3853 SMESHDS_SubMesh* edgeSM = getMeshDS()->MeshElements( E );
3854 if ( !edgeSM || edgeSM->NbElements() == 0 )
3855 return error(SMESH_Comment("Not meshed EDGE ") << getMeshDS()->ShapeToIndex( E ));
3857 const SMDS_MeshNode* n2 = 0;
3858 SMDS_ElemIteratorPtr eIt = srcNode->GetInverseElementIterator(SMDSAbs_Edge);
3859 while ( eIt->more() && !n2 )
3861 const SMDS_MeshElement* e = eIt->next();
3862 if ( !edgeSM->Contains(e)) continue;
3863 n2 = e->GetNode( 0 );
3864 if ( n2 == srcNode ) n2 = e->GetNode( 1 );
3867 return error(SMESH_Comment("Wrongly meshed EDGE ") << getMeshDS()->ShapeToIndex( E ));
3869 double uSrc = helper.GetNodeU( E, srcNode, n2 );
3870 double uTgt = helper.GetNodeU( E, tgtNode, srcNode );
3871 double u2 = helper.GetNodeU( E, n2, srcNode );
3873 if ( fabs( uSrc-uTgt ) < 0.99 * fabs( uSrc-u2 ))
3875 // tgtNode is located so that it does not make faces with wrong orientation
3878 edge._pos.resize(1);
3879 edge._pos[0].SetCoord( U_TGT, uTgt );
3880 edge._pos[0].SetCoord( U_SRC, uSrc );
3881 edge._pos[0].SetCoord( LEN_TGT, fabs( uSrc-uTgt ));
3883 edge._simplices.resize( 1 );
3884 edge._simplices[0]._nPrev = n2;
3886 // set UV of source node to target node
3887 SMDS_EdgePosition* pos = static_cast<SMDS_EdgePosition*>( tgtNode->GetPosition() );
3888 pos->SetUParameter( uSrc );
3892 //================================================================================
3894 * \brief Compute positions (UV) to set to a node on edge moved during shrinking
3896 //================================================================================
3898 // Compute UV to follow during shrinking
3900 // const SMDS_MeshNode* srcNode = edge._nodes[0];
3901 // const SMDS_MeshNode* tgtNode = edge._nodes.back();
3903 // gp_XY srcUV = helper.GetNodeUV( F, srcNode );
3904 // gp_XY tgtUV = helper.GetNodeUV( F, tgtNode );
3905 // gp_Vec2d uvDir( srcUV, tgtUV );
3906 // double uvLen = uvDir.Magnitude();
3909 // // Select shrinking step such that not to make faces with wrong orientation.
3910 // // IMPORTANT to have src nodes NOT yet REPLACED by tgt nodes in shrinked faces
3911 // const double minStepSize = uvLen / 20;
3912 // double stepSize = uvLen;
3913 // SMDS_ElemIteratorPtr fIt = srcNode->GetInverseElementIterator(SMDSAbs_Face);
3914 // while ( fIt->more() )
3916 // const SMDS_MeshElement* f = fIt->next();
3917 // if ( !faceSubMesh->Contains( f )) continue;
3918 // const int nbNodes = f->NbCornerNodes();
3919 // for ( int i = 0; i < nbNodes; ++i )
3921 // const SMDS_MeshNode* n = f->GetNode(i);
3922 // if ( n->GetPosition()->GetTypeOfPosition() != SMDS_TOP_FACE || n == srcNode)
3924 // gp_XY uv = helper.GetNodeUV( F, n );
3925 // gp_Vec2d uvDirN( srcUV, uv );
3926 // double proj = uvDirN * uvDir;
3927 // if ( proj < stepSize && proj > minStepSize )
3933 // const int nbSteps = ceil( uvLen / stepSize );
3934 // gp_XYZ srcUV0( srcUV.X(), srcUV.Y(), 0 );
3935 // gp_XYZ tgtUV0( tgtUV.X(), tgtUV.Y(), 0 );
3936 // edge._pos.resize( nbSteps );
3937 // edge._pos[0] = tgtUV0;
3938 // for ( int i = 1; i < nbSteps; ++i )
3940 // double r = i / double( nbSteps );
3941 // edge._pos[i] = (1-r) * tgtUV0 + r * srcUV0;
3946 //================================================================================
3948 * \brief Try to fix triangles with high aspect ratio by swaping diagonals
3950 //================================================================================
3952 void _ViscousBuilder::fixBadFaces(const TopoDS_Face& F, SMESH_MesherHelper& helper)
3954 SMESH::Controls::AspectRatio qualifier;
3955 SMESH::Controls::TSequenceOfXYZ points(3), points1(3), points2(3);
3956 const double maxAspectRatio = 4.;
3958 // find bad triangles
3960 vector< const SMDS_MeshElement* > badTrias;
3961 vector< double > badAspects;
3962 SMESHDS_SubMesh* sm = helper.GetMeshDS()->MeshElements( F );
3963 SMDS_ElemIteratorPtr fIt = sm->GetElements();
3964 while ( fIt->more() )
3966 const SMDS_MeshElement * f = fIt->next();
3967 if ( f->NbCornerNodes() != 3 ) continue;
3968 for ( int iP = 0; iP < 3; ++iP ) points(iP+1) = SMESH_TNodeXYZ( f->GetNode(iP));
3969 double aspect = qualifier.GetValue( points );
3970 if ( aspect > maxAspectRatio )
3972 badTrias.push_back( f );
3973 badAspects.push_back( aspect );
3976 if ( badTrias.empty() )
3979 // find couples of faces to swap diagonal
3981 typedef pair < const SMDS_MeshElement* , const SMDS_MeshElement* > T2Trias;
3982 vector< T2Trias > triaCouples;
3984 TIDSortedElemSet involvedFaces, emptySet;
3985 for ( size_t iTia = 0; iTia < badTrias.size(); ++iTia )
3988 double aspRatio [3];
3991 involvedFaces.insert( badTrias[iTia] );
3992 for ( int iP = 0; iP < 3; ++iP )
3993 points(iP+1) = SMESH_TNodeXYZ( badTrias[iTia]->GetNode(iP));
3995 // find triangles adjacent to badTrias[iTia] with better aspect ratio after diag-swaping
3996 int bestCouple = -1;
3997 for ( int iSide = 0; iSide < 3; ++iSide )
3999 const SMDS_MeshNode* n1 = badTrias[iTia]->GetNode( iSide );
4000 const SMDS_MeshNode* n2 = badTrias[iTia]->GetNode(( iSide+1 ) % 3 );
4001 trias [iSide].first = badTrias[iTia];
4002 trias [iSide].second = SMESH_MeshAlgos::FindFaceInSet( n1, n2, emptySet, involvedFaces,
4004 if ( ! trias[iSide].second || trias[iSide].second->NbCornerNodes() != 3 )
4007 // aspect ratio of an adjacent tria
4008 for ( int iP = 0; iP < 3; ++iP )
4009 points2(iP+1) = SMESH_TNodeXYZ( trias[iSide].second->GetNode(iP));
4010 double aspectInit = qualifier.GetValue( points2 );
4012 // arrange nodes as after diag-swaping
4013 if ( helper.WrapIndex( i1+1, 3 ) == i2 )
4014 i3 = helper.WrapIndex( i1-1, 3 );
4016 i3 = helper.WrapIndex( i1+1, 3 );
4018 points1( 1+ iSide ) = points2( 1+ i3 );
4019 points2( 1+ i2 ) = points1( 1+ ( iSide+2 ) % 3 );
4021 // aspect ratio after diag-swaping
4022 aspRatio[ iSide ] = qualifier.GetValue( points1 ) + qualifier.GetValue( points2 );
4023 if ( aspRatio[ iSide ] > aspectInit + badAspects[ iTia ] )
4026 if ( bestCouple < 0 || aspRatio[ bestCouple ] > aspRatio[ iSide ] )
4030 if ( bestCouple >= 0 )
4032 triaCouples.push_back( trias[bestCouple] );
4033 involvedFaces.insert ( trias[bestCouple].second );
4037 involvedFaces.erase( badTrias[iTia] );
4040 if ( triaCouples.empty() )
4045 SMESH_MeshEditor editor( helper.GetMesh() );
4046 dumpFunction(SMESH_Comment("beforeSwapDiagonals_F")<<helper.GetSubShapeID());
4047 for ( size_t i = 0; i < triaCouples.size(); ++i )
4049 dumpChangeNodes( triaCouples[i].first );
4050 dumpChangeNodes( triaCouples[i].second );
4051 editor.InverseDiag( triaCouples[i].first, triaCouples[i].second );
4055 // just for debug dump resulting triangles
4056 dumpFunction(SMESH_Comment("swapDiagonals_F")<<helper.GetSubShapeID());
4057 for ( size_t i = 0; i < triaCouples.size(); ++i )
4059 dumpChangeNodes( triaCouples[i].first );
4060 dumpChangeNodes( triaCouples[i].second );
4064 //================================================================================
4066 * \brief Move target node to it's final position on the FACE during shrinking
4068 //================================================================================
4070 bool _LayerEdge::SetNewLength2d( Handle(Geom_Surface)& surface,
4071 const TopoDS_Face& F,
4072 SMESH_MesherHelper& helper )
4075 return false; // already at the target position
4077 SMDS_MeshNode* tgtNode = const_cast< SMDS_MeshNode*& >( _nodes.back() );
4079 if ( _sWOL.ShapeType() == TopAbs_FACE )
4081 gp_XY curUV = helper.GetNodeUV( F, tgtNode );
4082 gp_Pnt2d tgtUV( _pos[0].X(), _pos[0].Y());
4083 gp_Vec2d uvDir( _normal.X(), _normal.Y() );
4084 const double uvLen = tgtUV.Distance( curUV );
4086 // Select shrinking step such that not to make faces with wrong orientation.
4087 const double kSafe = 0.8;
4088 const double minStepSize = uvLen / 10;
4089 double stepSize = uvLen;
4090 for ( unsigned i = 0; i < _simplices.size(); ++i )
4092 const SMDS_MeshNode* nn[2] = { _simplices[i]._nPrev, _simplices[i]._nNext };
4093 for ( int j = 0; j < 2; ++j )
4094 if ( const SMDS_MeshNode* n = nn[j] )
4096 gp_XY uv = helper.GetNodeUV( F, n );
4097 gp_Vec2d uvDirN( curUV, uv );
4098 double proj = uvDirN * uvDir * kSafe;
4099 if ( proj < stepSize && proj > minStepSize )
4101 else if ( proj < minStepSize )
4102 stepSize = minStepSize;
4107 if ( uvLen - stepSize < _len / 20. )
4114 newUV = curUV + uvDir.XY() * stepSize;
4117 SMDS_FacePosition* pos = static_cast<SMDS_FacePosition*>( tgtNode->GetPosition() );
4118 pos->SetUParameter( newUV.X() );
4119 pos->SetVParameter( newUV.Y() );
4122 gp_Pnt p = surface->Value( newUV.X(), newUV.Y() );
4123 tgtNode->setXYZ( p.X(), p.Y(), p.Z() );
4124 dumpMove( tgtNode );
4127 else // _sWOL is TopAbs_EDGE
4129 TopoDS_Edge E = TopoDS::Edge( _sWOL );
4130 const SMDS_MeshNode* n2 = _simplices[0]._nPrev;
4131 SMDS_EdgePosition* tgtPos = static_cast<SMDS_EdgePosition*>( tgtNode->GetPosition() );
4133 const double u2 = helper.GetNodeU( E, n2, tgtNode );
4134 const double uSrc = _pos[0].Coord( U_SRC );
4135 const double lenTgt = _pos[0].Coord( LEN_TGT );
4137 double newU = _pos[0].Coord( U_TGT );
4138 if ( lenTgt < 0.99 * fabs( uSrc-u2 )) // n2 got out of src-tgt range
4144 newU = 0.1 * tgtPos->GetUParameter() + 0.9 * u2;
4146 tgtPos->SetUParameter( newU );
4148 gp_XY newUV = helper.GetNodeUV( F, tgtNode, _nodes[0]);
4149 gp_Pnt p = surface->Value( newUV.X(), newUV.Y() );
4150 tgtNode->setXYZ( p.X(), p.Y(), p.Z() );
4151 dumpMove( tgtNode );
4157 //================================================================================
4159 * \brief Perform smooth on the FACE
4160 * \retval bool - true if the node has been moved
4162 //================================================================================
4164 bool _SmoothNode::Smooth(int& badNb,
4165 Handle(Geom_Surface)& surface,
4166 SMESH_MesherHelper& helper,
4167 const double refSign,
4171 const TopoDS_Face& face = TopoDS::Face( helper.GetSubShape() );
4173 // get uv of surrounding nodes
4174 vector<gp_XY> uv( _simplices.size() );
4175 for ( size_t i = 0; i < _simplices.size(); ++i )
4176 uv[i] = helper.GetNodeUV( face, _simplices[i]._nPrev, _node );
4178 // compute new UV for the node
4180 /* if ( how == ANGULAR && _simplices.size() == 4 )
4182 vector<gp_XY> corners; corners.reserve(4);
4183 for ( size_t i = 0; i < _simplices.size(); ++i )
4184 if ( _simplices[i]._nOpp )
4185 corners.push_back( helper.GetNodeUV( face, _simplices[i]._nOpp, _node ));
4186 if ( corners.size() == 4 )
4188 newPos = helper.calcTFI
4190 corners[0], corners[1], corners[2], corners[3],
4191 uv[1], uv[2], uv[3], uv[0] );
4193 // vector<gp_XY> p( _simplices.size() * 2 + 1 );
4195 // for ( size_t i = 0; i < _simplices.size(); ++i )
4197 // p.push_back( uv[i] );
4198 // if ( _simplices[i]._nOpp )
4199 // p.push_back( helper.GetNodeUV( face, _simplices[i]._nOpp, _node ));
4201 // newPos = computeAngularPos( p, helper.GetNodeUV( face, _node ), refSign );
4203 else*/ if ( how == CENTROIDAL && _simplices.size() > 3 )
4205 // average centers of diagonals wieghted with their reciprocal lengths
4206 if ( _simplices.size() == 4 )
4208 double w1 = 1. / ( uv[2]-uv[0] ).SquareModulus();
4209 double w2 = 1. / ( uv[3]-uv[1] ).SquareModulus();
4210 newPos = ( w1 * ( uv[2]+uv[0] ) + w2 * ( uv[3]+uv[1] )) / ( w1+w2 ) / 2;
4214 double sumWeight = 0;
4215 int nb = _simplices.size() == 4 ? 2 : _simplices.size();
4216 for ( int i = 0; i < nb; ++i )
4219 int iTo = i + _simplices.size() - 1;
4220 for ( int j = iFrom; j < iTo; ++j )
4222 int i2 = SMESH_MesherHelper::WrapIndex( j, _simplices.size() );
4223 double w = 1. / ( uv[i]-uv[i2] ).SquareModulus();
4225 newPos += w * ( uv[i]+uv[i2] );
4228 newPos /= 2 * sumWeight; // 2 is to get a middle between uv's
4234 //isCentroidal = false;
4235 for ( size_t i = 0; i < _simplices.size(); ++i )
4237 newPos /= _simplices.size();
4240 // count quality metrics (orientation) of triangles around the node
4242 gp_XY tgtUV = helper.GetNodeUV( face, _node );
4243 for ( unsigned i = 0; i < _simplices.size(); ++i )
4244 nbOkBefore += _simplices[i].IsForward( tgtUV, _node, face, helper, refSign );
4247 for ( unsigned i = 0; i < _simplices.size(); ++i )
4248 nbOkAfter += _simplices[i].IsForward( newPos, _node, face, helper, refSign );
4250 if ( nbOkAfter < nbOkBefore )
4252 // if ( isCentroidal )
4253 // return Smooth( badNb, surface, helper, refSign, !isCentroidal, set3D );
4254 badNb += _simplices.size() - nbOkBefore;
4258 SMDS_FacePosition* pos = static_cast<SMDS_FacePosition*>( _node->GetPosition() );
4259 pos->SetUParameter( newPos.X() );
4260 pos->SetVParameter( newPos.Y() );
4267 gp_Pnt p = surface->Value( newPos.X(), newPos.Y() );
4268 const_cast< SMDS_MeshNode* >( _node )->setXYZ( p.X(), p.Y(), p.Z() );
4272 badNb += _simplices.size() - nbOkAfter;
4273 return ( (tgtUV-newPos).SquareModulus() > 1e-10 );
4276 //================================================================================
4278 * \brief Computes new UV using angle based smoothing technic
4280 //================================================================================
4282 gp_XY _SmoothNode::computeAngularPos(vector<gp_XY>& uv,
4283 const gp_XY& uvToFix,
4284 const double refSign)
4286 uv.push_back( uv.front() );
4288 vector< gp_XY > edgeDir( uv.size() );
4289 vector< double > edgeSize( uv.size() );
4290 for ( size_t i = 1; i < edgeDir.size(); ++i )
4292 edgeDir[i-1] = uv[i] - uv[i-1];
4293 edgeSize[i-1] = edgeDir[i-1].Modulus();
4294 if ( edgeSize[i-1] < numeric_limits<double>::min() )
4295 edgeDir[i-1].SetX( 100 );
4297 edgeDir[i-1] /= edgeSize[i-1] * refSign;
4299 edgeDir.back() = edgeDir.front();
4300 edgeSize.back() = edgeSize.front();
4305 for ( size_t i = 1; i < edgeDir.size(); ++i )
4307 if ( edgeDir[i-1].X() > 1. ) continue;
4309 while ( edgeDir[i].X() > 1. && ++i < edgeDir.size() );
4310 if ( i == edgeDir.size() ) break;
4312 gp_XY norm1( -edgeDir[i1].Y(), edgeDir[i1].X() );
4313 gp_XY norm2( -edgeDir[i].Y(), edgeDir[i].X() );
4314 gp_XY bisec = norm1 + norm2;
4315 double bisecSize = bisec.Modulus();
4316 if ( bisecSize < numeric_limits<double>::min() )
4318 bisec = -edgeDir[i1] + edgeDir[i];
4319 bisecSize = bisec.Modulus();
4323 gp_XY dirToN = uvToFix - p;
4324 double distToN = dirToN.Modulus();
4325 if ( bisec * dirToN < 0 )
4328 newPos += ( p + bisec * distToN ) * ( edgeSize[i1] + edgeSize[i] );
4330 sumSize += edgeSize[i1] + edgeSize[i];
4332 newPos /= /*nbEdges * */sumSize;
4336 //================================================================================
4338 * \brief Delete _SolidData
4340 //================================================================================
4342 _SolidData::~_SolidData()
4344 for ( unsigned i = 0; i < _edges.size(); ++i )
4346 if ( _edges[i] && _edges[i]->_2neibors )
4347 delete _edges[i]->_2neibors;
4352 //================================================================================
4354 * \brief Add a _LayerEdge inflated along the EDGE
4356 //================================================================================
4358 void _Shrinker1D::AddEdge( const _LayerEdge* e, SMESH_MesherHelper& helper )
4361 if ( _nodes.empty() )
4363 _edges[0] = _edges[1] = 0;
4367 if ( e == _edges[0] || e == _edges[1] )
4369 if ( e->_sWOL.IsNull() || e->_sWOL.ShapeType() != TopAbs_EDGE )
4370 throw SALOME_Exception(LOCALIZED("Wrong _LayerEdge is added"));
4371 if ( _edges[0] && _edges[0]->_sWOL != e->_sWOL )
4372 throw SALOME_Exception(LOCALIZED("Wrong _LayerEdge is added"));
4375 const TopoDS_Edge& E = TopoDS::Edge( e->_sWOL );
4377 BRep_Tool::Range( E, f,l );
4378 double u = helper.GetNodeU( E, e->_nodes[0], e->_nodes.back());
4379 _edges[ u < 0.5*(f+l) ? 0 : 1 ] = e;
4383 const SMDS_MeshNode* tgtNode0 = _edges[0] ? _edges[0]->_nodes.back() : 0;
4384 const SMDS_MeshNode* tgtNode1 = _edges[1] ? _edges[1]->_nodes.back() : 0;
4386 if ( _nodes.empty() )
4388 SMESHDS_SubMesh * eSubMesh = helper.GetMeshDS()->MeshElements( E );
4389 if ( !eSubMesh || eSubMesh->NbNodes() < 1 )
4391 TopLoc_Location loc;
4392 Handle(Geom_Curve) C = BRep_Tool::Curve(E, loc, f,l);
4393 GeomAdaptor_Curve aCurve(C, f,l);
4394 const double totLen = GCPnts_AbscissaPoint::Length(aCurve, f, l);
4396 int nbExpectNodes = eSubMesh->NbNodes();
4397 _initU .reserve( nbExpectNodes );
4398 _normPar.reserve( nbExpectNodes );
4399 _nodes .reserve( nbExpectNodes );
4400 SMDS_NodeIteratorPtr nIt = eSubMesh->GetNodes();
4401 while ( nIt->more() )
4403 const SMDS_MeshNode* node = nIt->next();
4404 if ( node->NbInverseElements(SMDSAbs_Edge) == 0 ||
4405 node == tgtNode0 || node == tgtNode1 )
4406 continue; // refinement nodes
4407 _nodes.push_back( node );
4408 _initU.push_back( helper.GetNodeU( E, node ));
4409 double len = GCPnts_AbscissaPoint::Length(aCurve, f, _initU.back());
4410 _normPar.push_back( len / totLen );
4415 // remove target node of the _LayerEdge from _nodes
4417 for ( unsigned i = 0; i < _nodes.size(); ++i )
4418 if ( !_nodes[i] || _nodes[i] == tgtNode0 || _nodes[i] == tgtNode1 )
4419 _nodes[i] = 0, nbFound++;
4420 if ( nbFound == _nodes.size() )
4425 //================================================================================
4427 * \brief Move nodes on EDGE from ends where _LayerEdge's are inflated
4429 //================================================================================
4431 void _Shrinker1D::Compute(bool set3D, SMESH_MesherHelper& helper)
4433 if ( _done || _nodes.empty())
4435 const _LayerEdge* e = _edges[0];
4436 if ( !e ) e = _edges[1];
4439 _done = (( !_edges[0] || _edges[0]->_pos.empty() ) &&
4440 ( !_edges[1] || _edges[1]->_pos.empty() ));
4442 const TopoDS_Edge& E = TopoDS::Edge( e->_sWOL );
4444 if ( set3D || _done )
4446 Handle(Geom_Curve) C = BRep_Tool::Curve(E, f,l);
4447 GeomAdaptor_Curve aCurve(C, f,l);
4450 f = helper.GetNodeU( E, _edges[0]->_nodes.back(), _nodes[0] );
4452 l = helper.GetNodeU( E, _edges[1]->_nodes.back(), _nodes.back() );
4453 double totLen = GCPnts_AbscissaPoint::Length( aCurve, f, l );
4455 for ( unsigned i = 0; i < _nodes.size(); ++i )
4457 if ( !_nodes[i] ) continue;
4458 double len = totLen * _normPar[i];
4459 GCPnts_AbscissaPoint discret( aCurve, len, f );
4460 if ( !discret.IsDone() )
4461 return throw SALOME_Exception(LOCALIZED("GCPnts_AbscissaPoint failed"));
4462 double u = discret.Parameter();
4463 SMDS_EdgePosition* pos = static_cast<SMDS_EdgePosition*>( _nodes[i]->GetPosition() );
4464 pos->SetUParameter( u );
4465 gp_Pnt p = C->Value( u );
4466 const_cast< SMDS_MeshNode*>( _nodes[i] )->setXYZ( p.X(), p.Y(), p.Z() );
4471 BRep_Tool::Range( E, f,l );
4473 f = helper.GetNodeU( E, _edges[0]->_nodes.back(), _nodes[0] );
4475 l = helper.GetNodeU( E, _edges[1]->_nodes.back(), _nodes.back() );
4477 for ( unsigned i = 0; i < _nodes.size(); ++i )
4479 if ( !_nodes[i] ) continue;
4480 double u = f * ( 1-_normPar[i] ) + l * _normPar[i];
4481 SMDS_EdgePosition* pos = static_cast<SMDS_EdgePosition*>( _nodes[i]->GetPosition() );
4482 pos->SetUParameter( u );
4487 //================================================================================
4489 * \brief Restore initial parameters of nodes on EDGE
4491 //================================================================================
4493 void _Shrinker1D::RestoreParams()
4496 for ( unsigned i = 0; i < _nodes.size(); ++i )
4498 if ( !_nodes[i] ) continue;
4499 SMDS_EdgePosition* pos = static_cast<SMDS_EdgePosition*>( _nodes[i]->GetPosition() );
4500 pos->SetUParameter( _initU[i] );
4505 //================================================================================
4507 * \brief Replace source nodes by target nodes in shrinked mesh edges
4509 //================================================================================
4511 void _Shrinker1D::SwapSrcTgtNodes( SMESHDS_Mesh* mesh )
4513 const SMDS_MeshNode* nodes[3];
4514 for ( int i = 0; i < 2; ++i )
4516 if ( !_edges[i] ) continue;
4518 SMESHDS_SubMesh * eSubMesh = mesh->MeshElements( _edges[i]->_sWOL );
4519 if ( !eSubMesh ) return;
4520 const SMDS_MeshNode* srcNode = _edges[i]->_nodes[0];
4521 const SMDS_MeshNode* tgtNode = _edges[i]->_nodes.back();
4522 SMDS_ElemIteratorPtr eIt = srcNode->GetInverseElementIterator(SMDSAbs_Edge);
4523 while ( eIt->more() )
4525 const SMDS_MeshElement* e = eIt->next();
4526 if ( !eSubMesh->Contains( e ))
4528 SMDS_ElemIteratorPtr nIt = e->nodesIterator();
4529 for ( int iN = 0; iN < e->NbNodes(); ++iN )
4531 const SMDS_MeshNode* n = static_cast<const SMDS_MeshNode*>( nIt->next() );
4532 nodes[iN] = ( n == srcNode ? tgtNode : n );
4534 mesh->ChangeElementNodes( e, nodes, e->NbNodes() );
4539 //================================================================================
4541 * \brief Creates 2D and 1D elements on boundaries of new prisms
4543 //================================================================================
4545 bool _ViscousBuilder::addBoundaryElements()
4547 SMESH_MesherHelper helper( *_mesh );
4549 for ( unsigned i = 0; i < _sdVec.size(); ++i )
4551 _SolidData& data = _sdVec[i];
4552 TopTools_IndexedMapOfShape geomEdges;
4553 TopExp::MapShapes( data._solid, TopAbs_EDGE, geomEdges );
4554 for ( int iE = 1; iE <= geomEdges.Extent(); ++iE )
4556 const TopoDS_Edge& E = TopoDS::Edge( geomEdges(iE));
4558 // Get _LayerEdge's based on E
4560 map< double, const SMDS_MeshNode* > u2nodes;
4561 if ( !SMESH_Algo::GetSortedNodesOnEdge( getMeshDS(), E, /*ignoreMedium=*/false, u2nodes))
4564 vector< _LayerEdge* > ledges; ledges.reserve( u2nodes.size() );
4565 TNode2Edge & n2eMap = data._n2eMap;
4566 map< double, const SMDS_MeshNode* >::iterator u2n = u2nodes.begin();
4568 //check if 2D elements are needed on E
4569 TNode2Edge::iterator n2e = n2eMap.find( u2n->second );
4570 if ( n2e == n2eMap.end() ) continue; // no layers on vertex
4571 ledges.push_back( n2e->second );
4573 if (( n2e = n2eMap.find( u2n->second )) == n2eMap.end() )
4574 continue; // no layers on E
4575 ledges.push_back( n2eMap[ u2n->second ]);
4577 const SMDS_MeshNode* tgtN0 = ledges[0]->_nodes.back();
4578 const SMDS_MeshNode* tgtN1 = ledges[1]->_nodes.back();
4579 int nbSharedPyram = 0;
4580 SMDS_ElemIteratorPtr vIt = tgtN0->GetInverseElementIterator(SMDSAbs_Volume);
4581 while ( vIt->more() )
4583 const SMDS_MeshElement* v = vIt->next();
4584 nbSharedPyram += int( v->GetNodeIndex( tgtN1 ) >= 0 );
4586 if ( nbSharedPyram > 1 )
4587 continue; // not free border of the pyramid
4589 if ( getMeshDS()->FindFace( ledges[0]->_nodes[0], ledges[0]->_nodes[1],
4590 ledges[1]->_nodes[0], ledges[1]->_nodes[1]))
4591 continue; // faces already created
4593 for ( ++u2n; u2n != u2nodes.end(); ++u2n )
4594 ledges.push_back( n2eMap[ u2n->second ]);
4596 // Find out orientation and type of face to create
4598 bool reverse = false, isOnFace;
4600 map< TGeomID, TopoDS_Shape >::iterator e2f =
4601 data._shrinkShape2Shape.find( getMeshDS()->ShapeToIndex( E ));
4603 if (( isOnFace = ( e2f != data._shrinkShape2Shape.end() )))
4605 F = e2f->second.Oriented( TopAbs_FORWARD );
4606 reverse = ( helper.GetSubShapeOri( F, E ) == TopAbs_REVERSED );
4607 if ( helper.GetSubShapeOri( data._solid, F ) == TopAbs_REVERSED )
4608 reverse = !reverse, F.Reverse();
4609 if ( helper.IsReversedSubMesh( TopoDS::Face(F) ))
4614 // find FACE with layers sharing E
4615 PShapeIteratorPtr fIt = helper.GetAncestors( E, *_mesh, TopAbs_FACE );
4616 while ( fIt->more() && F.IsNull() )
4618 const TopoDS_Shape* pF = fIt->next();
4619 if ( helper.IsSubShape( *pF, data._solid) &&
4620 !_ignoreShapeIds.count( e2f->first ))
4624 // Find the sub-mesh to add new faces
4625 SMESHDS_SubMesh* sm = 0;
4627 sm = getMeshDS()->MeshElements( F );
4629 sm = data._proxyMesh->getFaceSubM( TopoDS::Face(F), /*create=*/true );
4631 return error("error in addBoundaryElements()", data._index);
4634 const int dj1 = reverse ? 0 : 1;
4635 const int dj2 = reverse ? 1 : 0;
4636 for ( unsigned j = 1; j < ledges.size(); ++j )
4638 vector< const SMDS_MeshNode*>& nn1 = ledges[j-dj1]->_nodes;
4639 vector< const SMDS_MeshNode*>& nn2 = ledges[j-dj2]->_nodes;
4641 for ( size_t z = 1; z < nn1.size(); ++z )
4642 sm->AddElement( getMeshDS()->AddFace( nn1[z-1], nn2[z-1], nn2[z], nn1[z] ));
4644 for ( size_t z = 1; z < nn1.size(); ++z )
4645 sm->AddElement( new SMDS_FaceOfNodes( nn1[z-1], nn2[z-1], nn2[z], nn1[z]));
4649 for ( int isFirst = 0; isFirst < 2; ++isFirst )
4651 _LayerEdge* edge = isFirst ? ledges.front() : ledges.back();
4652 if ( !edge->_sWOL.IsNull() && edge->_sWOL.ShapeType() == TopAbs_EDGE )
4654 vector< const SMDS_MeshNode*>& nn = edge->_nodes;
4655 if ( nn[1]->GetInverseElementIterator( SMDSAbs_Edge )->more() )
4657 helper.SetSubShape( edge->_sWOL );
4658 helper.SetElementsOnShape( true );
4659 for ( size_t z = 1; z < nn.size(); ++z )
4660 helper.AddEdge( nn[z-1], nn[z] );