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, TFI };
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,
504 SMESH_MesherHelper& helper,
507 set<const SMDS_MeshNode*> * involvedNodes=NULL);
508 bool addBoundaryElements();
510 bool error( const string& text, int solidID=-1 );
511 SMESHDS_Mesh* getMeshDS() { return _mesh->GetMeshDS(); }
514 void makeGroupOfLE();
517 SMESH_ComputeErrorPtr _error;
519 vector< _SolidData > _sdVec;
520 set<TGeomID> _ignoreShapeIds;
523 //--------------------------------------------------------------------------------
525 * \brief Shrinker of nodes on the EDGE
529 vector<double> _initU;
530 vector<double> _normPar;
531 vector<const SMDS_MeshNode*> _nodes;
532 const _LayerEdge* _edges[2];
535 void AddEdge( const _LayerEdge* e, SMESH_MesherHelper& helper );
536 void Compute(bool set3D, SMESH_MesherHelper& helper);
537 void RestoreParams();
538 void SwapSrcTgtNodes(SMESHDS_Mesh* mesh);
540 //--------------------------------------------------------------------------------
542 * \brief Class of temporary mesh face.
543 * We can't use SMDS_FaceOfNodes since it's impossible to set it's ID which is
544 * needed because SMESH_ElementSearcher internaly uses set of elements sorted by ID
546 struct TmpMeshFace : public SMDS_MeshElement
548 vector<const SMDS_MeshNode* > _nn;
549 TmpMeshFace( const vector<const SMDS_MeshNode*>& nodes, int id):
550 SMDS_MeshElement(id), _nn(nodes) {}
551 virtual const SMDS_MeshNode* GetNode(const int ind) const { return _nn[ind]; }
552 virtual SMDSAbs_ElementType GetType() const { return SMDSAbs_Face; }
553 virtual vtkIdType GetVtkType() const { return -1; }
554 virtual SMDSAbs_EntityType GetEntityType() const { return SMDSEntity_Last; }
555 virtual SMDSAbs_GeometryType GetGeomType() const { return SMDSGeom_TRIANGLE; }
556 virtual SMDS_ElemIteratorPtr elementsIterator(SMDSAbs_ElementType) const
557 { return SMDS_ElemIteratorPtr( new SMDS_NodeVectorElemIterator( _nn.begin(), _nn.end()));}
559 //--------------------------------------------------------------------------------
561 * \brief Class of temporary mesh face storing _LayerEdge it's based on
563 struct TmpMeshFaceOnEdge : public TmpMeshFace
565 _LayerEdge *_le1, *_le2;
566 TmpMeshFaceOnEdge( _LayerEdge* le1, _LayerEdge* le2, int ID ):
567 TmpMeshFace( vector<const SMDS_MeshNode*>(4), ID ), _le1(le1), _le2(le2)
569 _nn[0]=_le1->_nodes[0];
570 _nn[1]=_le1->_nodes.back();
571 _nn[2]=_le2->_nodes.back();
572 _nn[3]=_le2->_nodes[0];
575 //--------------------------------------------------------------------------------
577 * \brief Retriever of node coordinates either directly of from a surface by node UV.
578 * \warning Location of a surface is ignored
580 struct NodeCoordHelper
582 SMESH_MesherHelper& _helper;
583 const TopoDS_Face& _face;
584 Handle(Geom_Surface) _surface;
585 gp_XYZ (NodeCoordHelper::* _fun)(const SMDS_MeshNode* n) const;
587 NodeCoordHelper(const TopoDS_Face& F, SMESH_MesherHelper& helper, bool is2D)
588 : _helper( helper ), _face( F )
593 _surface = BRep_Tool::Surface( _face, loc );
595 if ( _surface.IsNull() )
596 _fun = & NodeCoordHelper::direct;
598 _fun = & NodeCoordHelper::byUV;
600 gp_XYZ operator()(const SMDS_MeshNode* n) const { return (this->*_fun)( n ); }
603 gp_XYZ direct(const SMDS_MeshNode* n) const
605 return SMESH_TNodeXYZ( n );
607 gp_XYZ byUV (const SMDS_MeshNode* n) const
609 gp_XY uv = _helper.GetNodeUV( _face, n );
610 return _surface->Value( uv.X(), uv.Y() ).XYZ();
613 } // namespace VISCOUS_3D
615 //================================================================================
616 // StdMeshers_ViscousLayers hypothesis
618 StdMeshers_ViscousLayers::StdMeshers_ViscousLayers(int hypId, int studyId, SMESH_Gen* gen)
619 :SMESH_Hypothesis(hypId, studyId, gen),
620 _isToIgnoreShapes(18), _nbLayers(1), _thickness(1), _stretchFactor(1)
622 _name = StdMeshers_ViscousLayers::GetHypType();
623 _param_algo_dim = -3; // auxiliary hyp used by 3D algos
624 } // --------------------------------------------------------------------------------
625 void StdMeshers_ViscousLayers::SetBndShapes(const std::vector<int>& faceIds, bool toIgnore)
627 if ( faceIds != _shapeIds )
628 _shapeIds = faceIds, NotifySubMeshesHypothesisModification();
629 if ( _isToIgnoreShapes != toIgnore )
630 _isToIgnoreShapes = toIgnore, NotifySubMeshesHypothesisModification();
631 } // --------------------------------------------------------------------------------
632 void StdMeshers_ViscousLayers::SetTotalThickness(double thickness)
634 if ( thickness != _thickness )
635 _thickness = thickness, NotifySubMeshesHypothesisModification();
636 } // --------------------------------------------------------------------------------
637 void StdMeshers_ViscousLayers::SetNumberLayers(int nb)
639 if ( _nbLayers != nb )
640 _nbLayers = nb, NotifySubMeshesHypothesisModification();
641 } // --------------------------------------------------------------------------------
642 void StdMeshers_ViscousLayers::SetStretchFactor(double factor)
644 if ( _stretchFactor != factor )
645 _stretchFactor = factor, NotifySubMeshesHypothesisModification();
646 } // --------------------------------------------------------------------------------
648 StdMeshers_ViscousLayers::Compute(SMESH_Mesh& theMesh,
649 const TopoDS_Shape& theShape,
650 const bool toMakeN2NMap) const
652 using namespace VISCOUS_3D;
653 _ViscousBuilder bulder;
654 SMESH_ComputeErrorPtr err = bulder.Compute( theMesh, theShape );
655 if ( err && !err->IsOK() )
656 return SMESH_ProxyMesh::Ptr();
658 vector<SMESH_ProxyMesh::Ptr> components;
659 TopExp_Explorer exp( theShape, TopAbs_SOLID );
660 for ( ; exp.More(); exp.Next() )
662 if ( _MeshOfSolid* pm =
663 _ViscousListener::GetSolidMesh( &theMesh, exp.Current(), /*toCreate=*/false))
665 if ( toMakeN2NMap && !pm->_n2nMapComputed )
666 if ( !bulder.MakeN2NMap( pm ))
667 return SMESH_ProxyMesh::Ptr();
668 components.push_back( SMESH_ProxyMesh::Ptr( pm ));
669 pm->myIsDeletable = false; // it will de deleted by boost::shared_ptr
671 _ViscousListener::RemoveSolidMesh ( &theMesh, exp.Current() );
673 switch ( components.size() )
677 case 1: return components[0];
679 default: return SMESH_ProxyMesh::Ptr( new SMESH_ProxyMesh( components ));
681 return SMESH_ProxyMesh::Ptr();
682 } // --------------------------------------------------------------------------------
683 std::ostream & StdMeshers_ViscousLayers::SaveTo(std::ostream & save)
685 save << " " << _nbLayers
687 << " " << _stretchFactor
688 << " " << _shapeIds.size();
689 for ( unsigned i = 0; i < _shapeIds.size(); ++i )
690 save << " " << _shapeIds[i];
691 save << " " << !_isToIgnoreShapes; // negate to keep the behavior in old studies.
693 } // --------------------------------------------------------------------------------
694 std::istream & StdMeshers_ViscousLayers::LoadFrom(std::istream & load)
696 int nbFaces, faceID, shapeToTreat;
697 load >> _nbLayers >> _thickness >> _stretchFactor >> nbFaces;
698 while ( _shapeIds.size() < nbFaces && load >> faceID )
699 _shapeIds.push_back( faceID );
700 if ( load >> shapeToTreat )
701 _isToIgnoreShapes = !shapeToTreat;
703 _isToIgnoreShapes = true; // old behavior
705 } // --------------------------------------------------------------------------------
706 bool StdMeshers_ViscousLayers::SetParametersByMesh(const SMESH_Mesh* theMesh,
707 const TopoDS_Shape& theShape)
712 // END StdMeshers_ViscousLayers hypothesis
713 //================================================================================
717 gp_XYZ getEdgeDir( const TopoDS_Edge& E, const TopoDS_Vertex& fromV )
721 Handle(Geom_Curve) c = BRep_Tool::Curve( E, f, l );
722 gp_Pnt p = BRep_Tool::Pnt( fromV );
723 double distF = p.SquareDistance( c->Value( f ));
724 double distL = p.SquareDistance( c->Value( l ));
725 c->D1(( distF < distL ? f : l), p, dir );
726 if ( distL < distF ) dir.Reverse();
729 //--------------------------------------------------------------------------------
730 gp_XYZ getEdgeDir( const TopoDS_Edge& E, const SMDS_MeshNode* atNode,
731 SMESH_MesherHelper& helper)
734 double f,l; gp_Pnt p;
735 Handle(Geom_Curve) c = BRep_Tool::Curve( E, f, l );
736 double u = helper.GetNodeU( E, atNode );
740 //--------------------------------------------------------------------------------
741 gp_XYZ getFaceDir( const TopoDS_Face& F, const TopoDS_Edge& fromE,
742 const SMDS_MeshNode* node, SMESH_MesherHelper& helper, bool& ok)
744 gp_XY uv = helper.GetNodeUV( F, node, 0, &ok );
745 Handle(Geom_Surface) surface = BRep_Tool::Surface( F );
746 gp_Pnt p; gp_Vec du, dv, norm;
747 surface->D1( uv.X(),uv.Y(), p, du,dv );
751 Handle(Geom_Curve) c = BRep_Tool::Curve( fromE, f, l );
752 double u = helper.GetNodeU( fromE, node, 0, &ok );
754 TopAbs_Orientation o = helper.GetSubShapeOri( F.Oriented(TopAbs_FORWARD), fromE);
755 if ( o == TopAbs_REVERSED )
758 gp_Vec dir = norm ^ du;
760 if ( node->GetPosition()->GetTypeOfPosition() == SMDS_TOP_VERTEX &&
761 helper.IsClosedEdge( fromE ))
763 if ( fabs(u-f) < fabs(u-l )) c->D1( l, p, dv );
764 else c->D1( f, p, dv );
765 if ( o == TopAbs_REVERSED )
767 gp_Vec dir2 = norm ^ dv;
768 dir = dir.Normalized() + dir2.Normalized();
772 //--------------------------------------------------------------------------------
773 gp_XYZ getFaceDir( const TopoDS_Face& F, const TopoDS_Vertex& fromV,
774 const SMDS_MeshNode* node, SMESH_MesherHelper& helper,
775 bool& ok, double* cosin=0)
777 double f,l; TopLoc_Location loc;
778 vector< TopoDS_Edge > edges; // sharing a vertex
779 PShapeIteratorPtr eIt = helper.GetAncestors( fromV, *helper.GetMesh(), TopAbs_EDGE);
782 const TopoDS_Edge* e = static_cast<const TopoDS_Edge*>( eIt->next() );
783 if ( helper.IsSubShape( *e, F ) && !BRep_Tool::Curve( *e, loc,f,l).IsNull() )
784 edges.push_back( *e );
787 if ( !( ok = ( edges.size() > 0 ))) return dir;
788 // get average dir of edges going fromV
790 //if ( edges.size() > 1 )
791 for ( unsigned i = 0; i < edges.size(); ++i )
793 edgeDir = getEdgeDir( edges[i], fromV );
794 double size2 = edgeDir.SquareModulus();
795 if ( size2 > numeric_limits<double>::min() )
796 edgeDir /= sqrt( size2 );
801 gp_XYZ fromEdgeDir = getFaceDir( F, edges[0], node, helper, ok );
802 if ( edges.size() == 1 )
804 else if ( dir.SquareModulus() < 0.1 ) // ~< 20 degrees
805 dir = fromEdgeDir + getFaceDir( F, edges[1], node, helper, ok );
806 else if ( dir * fromEdgeDir < 0 )
810 //dir /= edges.size();
812 double angle = gp_Vec( edgeDir ).Angle( dir );
813 *cosin = cos( angle );
818 //================================================================================
820 * \brief Returns true if a FACE is bound by a concave EDGE
822 //================================================================================
824 bool isConcave( const TopoDS_Face& F, SMESH_MesherHelper& helper )
826 // if ( helper.Count( F, TopAbs_WIRE, /*useMap=*/false) > 1 )
830 TopExp_Explorer eExp( F.Oriented( TopAbs_FORWARD ), TopAbs_EDGE );
831 for ( ; eExp.More(); eExp.Next() )
833 const TopoDS_Edge& E = TopoDS::Edge( eExp.Current() );
834 if ( SMESH_Algo::isDegenerated( E )) continue;
835 // check if 2D curve is concave
836 BRepAdaptor_Curve2d curve( E, F );
837 const int nbIntervals = curve.NbIntervals( GeomAbs_C2 );
838 TColStd_Array1OfReal intervals(1, nbIntervals + 1 );
839 curve.Intervals( intervals, GeomAbs_C2 );
840 bool isConvex = true;
841 for ( int i = 1; i <= nbIntervals && isConvex; ++i )
843 double u1 = intervals( i );
844 double u2 = intervals( i+1 );
845 curve.D2( 0.5*( u1+u2 ), p, drv1, drv2 );
846 double cross = drv2 ^ drv1;
847 if ( E.Orientation() == TopAbs_REVERSED )
849 isConvex = ( cross > 0.1 ); //-1e-9 );
851 // check if concavity is strong enough to care about it
852 //const double maxAngle = 5 * Standard_PI180;
855 //cout << "Concave FACE " << helper.GetMeshDS()->ShapeToIndex( F ) << endl;
857 // map< double, const SMDS_MeshNode* > u2nodes;
858 // if ( !SMESH_Algo::GetSortedNodesOnEdge( helper.GetMeshDS(), E,
859 // /*ignoreMedium=*/true, u2nodes))
861 // map< double, const SMDS_MeshNode* >::iterator u2n = u2nodes.begin();
862 // gp_Pnt2d uvPrev = helper.GetNodeUV( F, u2n->second );
863 // double uPrev = u2n->first;
864 // for ( ++u2n; u2n != u2nodes.end(); ++u2n )
866 // gp_Pnt2d uv = helper.GetNodeUV( F, u2n->second );
867 // gp_Vec2d segmentDir( uvPrev, uv );
868 // curve.D1( uPrev, p, drv1 );
870 // if ( fabs( segmentDir.Angle( drv1 )) > maxAngle )
875 // uPrev = u2n->first;
879 // check angles at VERTEXes
881 TSideVector wires = StdMeshers_FaceSide::GetFaceWires( F, *helper.GetMesh(), 0, error );
882 for ( size_t iW = 0; iW < wires.size(); ++iW )
884 const int nbEdges = wires[iW]->NbEdges();
885 if ( nbEdges < 2 && SMESH_Algo::isDegenerated( wires[iW]->Edge(0)))
887 for ( int iE1 = 0; iE1 < nbEdges; ++iE1 )
889 if ( SMESH_Algo::isDegenerated( wires[iW]->Edge( iE1 ))) continue;
890 int iE2 = ( iE1 + 1 ) % nbEdges;
891 while ( SMESH_Algo::isDegenerated( wires[iW]->Edge( iE2 )))
892 iE2 = ( iE2 + 1 ) % nbEdges;
893 double angle = helper.GetAngle( wires[iW]->Edge( iE1 ),
894 wires[iW]->Edge( iE2 ), F );
895 if ( angle < -5. * M_PI / 180. )
901 //--------------------------------------------------------------------------------
902 // DEBUG. Dump intermediate node positions into a python script
907 const char* fname = "/tmp/viscous.py";
908 cout << "execfile('"<<fname<<"')"<<endl;
909 py = new ofstream(fname);
910 *py << "import SMESH" << endl
911 << "from salome.smesh import smeshBuilder" << endl
912 << "smesh = smeshBuilder.New(salome.myStudy)" << endl
913 << "meshSO = smesh.GetCurrentStudy().FindObjectID('0:1:2:3')" << endl
914 << "mesh = smesh.Mesh( meshSO.GetObject() )"<<endl;
918 *py << "mesh.MakeGroup('Viscous Prisms',SMESH.VOLUME,SMESH.FT_ElemGeomType,'=',SMESH.Geom_PENTA)"<<endl;
921 ~PyDump() { Finish(); }
923 #define dumpFunction(f) { _dumpFunction(f, __LINE__);}
924 #define dumpMove(n) { _dumpMove(n, __LINE__);}
925 #define dumpCmd(txt) { _dumpCmd(txt, __LINE__);}
926 void _dumpFunction(const string& fun, int ln)
927 { if (py) *py<< "def "<<fun<<"(): # "<< ln <<endl; cout<<fun<<"()"<<endl;}
928 void _dumpMove(const SMDS_MeshNode* n, int ln)
929 { if (py) *py<< " mesh.MoveNode( "<<n->GetID()<< ", "<< n->X()
930 << ", "<<n->Y()<<", "<< n->Z()<< ")\t\t # "<< ln <<endl; }
931 void _dumpCmd(const string& txt, int ln)
932 { if (py) *py<< " "<<txt<<" # "<< ln <<endl; }
933 void dumpFunctionEnd()
934 { if (py) *py<< " return"<< endl; }
935 void dumpChangeNodes( const SMDS_MeshElement* f )
936 { if (py) { *py<< " mesh.ChangeElemNodes( " << f->GetID()<<", [";
937 for ( int i=1; i < f->NbNodes(); ++i ) *py << f->GetNode(i-1)->GetID()<<", ";
938 *py << f->GetNode( f->NbNodes()-1 )->GetID() << " ])"<< endl; }}
940 struct PyDump { void Finish() {} };
941 #define dumpFunction(f) f
944 #define dumpFunctionEnd()
945 #define dumpChangeNodes(f)
949 using namespace VISCOUS_3D;
951 //================================================================================
953 * \brief Constructor of _ViscousBuilder
955 //================================================================================
957 _ViscousBuilder::_ViscousBuilder()
959 _error = SMESH_ComputeError::New(COMPERR_OK);
963 //================================================================================
965 * \brief Stores error description and returns false
967 //================================================================================
969 bool _ViscousBuilder::error(const string& text, int solidId )
971 _error->myName = COMPERR_ALGO_FAILED;
972 _error->myComment = string("Viscous layers builder: ") + text;
975 SMESH_subMesh* sm = _mesh->GetSubMeshContaining( solidId );
976 if ( !sm && !_sdVec.empty() )
977 sm = _mesh->GetSubMeshContaining( _sdVec[0]._index );
978 if ( sm && sm->GetSubShape().ShapeType() == TopAbs_SOLID )
980 SMESH_ComputeErrorPtr& smError = sm->GetComputeError();
981 if ( smError && smError->myAlgo )
982 _error->myAlgo = smError->myAlgo;
986 makeGroupOfLE(); // debug
991 //================================================================================
993 * \brief At study restoration, restore event listeners used to clear an inferior
994 * dim sub-mesh modified by viscous layers
996 //================================================================================
998 void _ViscousBuilder::RestoreListeners()
1003 //================================================================================
1005 * \brief computes SMESH_ProxyMesh::SubMesh::_n2n
1007 //================================================================================
1009 bool _ViscousBuilder::MakeN2NMap( _MeshOfSolid* pm )
1011 SMESH_subMesh* solidSM = pm->mySubMeshes.front();
1012 TopExp_Explorer fExp( solidSM->GetSubShape(), TopAbs_FACE );
1013 for ( ; fExp.More(); fExp.Next() )
1015 SMESHDS_SubMesh* srcSmDS = pm->GetMeshDS()->MeshElements( fExp.Current() );
1016 const SMESH_ProxyMesh::SubMesh* prxSmDS = pm->GetProxySubMesh( fExp.Current() );
1018 if ( !srcSmDS || !prxSmDS || !srcSmDS->NbElements() || !prxSmDS->NbElements() )
1020 if ( srcSmDS->GetElements()->next() == prxSmDS->GetElements()->next())
1023 if ( srcSmDS->NbElements() != prxSmDS->NbElements() )
1024 return error( "Different nb elements in a source and a proxy sub-mesh", solidSM->GetId());
1026 SMDS_ElemIteratorPtr srcIt = srcSmDS->GetElements();
1027 SMDS_ElemIteratorPtr prxIt = prxSmDS->GetElements();
1028 while( prxIt->more() )
1030 const SMDS_MeshElement* fSrc = srcIt->next();
1031 const SMDS_MeshElement* fPrx = prxIt->next();
1032 if ( fSrc->NbNodes() != fPrx->NbNodes())
1033 return error( "Different elements in a source and a proxy sub-mesh", solidSM->GetId());
1034 for ( int i = 0 ; i < fPrx->NbNodes(); ++i )
1035 pm->setNode2Node( fSrc->GetNode(i), fPrx->GetNode(i), prxSmDS );
1038 pm->_n2nMapComputed = true;
1042 //================================================================================
1044 * \brief Does its job
1046 //================================================================================
1048 SMESH_ComputeErrorPtr _ViscousBuilder::Compute(SMESH_Mesh& theMesh,
1049 const TopoDS_Shape& theShape)
1051 // TODO: set priority of solids during Gen::Compute()
1055 // check if proxy mesh already computed
1056 TopExp_Explorer exp( theShape, TopAbs_SOLID );
1058 return error("No SOLID's in theShape"), _error;
1060 if ( _ViscousListener::GetSolidMesh( _mesh, exp.Current(), /*toCreate=*/false))
1061 return SMESH_ComputeErrorPtr(); // everything already computed
1065 // TODO: ignore already computed SOLIDs
1066 if ( !findSolidsWithLayers())
1069 if ( !findFacesWithLayers() )
1072 for ( unsigned i = 0; i < _sdVec.size(); ++i )
1074 if ( ! makeLayer(_sdVec[i]) )
1077 if ( _sdVec[i]._edges.size() == 0 )
1080 if ( ! inflate(_sdVec[i]) )
1083 if ( ! refine(_sdVec[i]) )
1089 addBoundaryElements();
1091 makeGroupOfLE(); // debug
1097 //================================================================================
1099 * \brief Finds SOLIDs to compute using viscous layers. Fills _sdVec
1101 //================================================================================
1103 bool _ViscousBuilder::findSolidsWithLayers()
1106 TopTools_IndexedMapOfShape allSolids;
1107 TopExp::MapShapes( _mesh->GetShapeToMesh(), TopAbs_SOLID, allSolids );
1108 _sdVec.reserve( allSolids.Extent());
1110 SMESH_Gen* gen = _mesh->GetGen();
1111 for ( int i = 1; i <= allSolids.Extent(); ++i )
1113 // find StdMeshers_ViscousLayers hyp assigned to the i-th solid
1114 SMESH_Algo* algo = gen->GetAlgo( *_mesh, allSolids(i) );
1115 if ( !algo ) continue;
1116 // TODO: check if algo is hidden
1117 const list <const SMESHDS_Hypothesis *> & allHyps =
1118 algo->GetUsedHypothesis(*_mesh, allSolids(i), /*ignoreAuxiliary=*/false);
1119 list< const SMESHDS_Hypothesis *>::const_iterator hyp = allHyps.begin();
1120 const StdMeshers_ViscousLayers* viscHyp = 0;
1121 for ( ; hyp != allHyps.end() && !viscHyp; ++hyp )
1122 viscHyp = dynamic_cast<const StdMeshers_ViscousLayers*>( *hyp );
1125 _MeshOfSolid* proxyMesh = _ViscousListener::GetSolidMesh( _mesh,
1128 _sdVec.push_back( _SolidData( allSolids(i), viscHyp, proxyMesh ));
1129 _sdVec.back()._index = getMeshDS()->ShapeToIndex( allSolids(i));
1132 if ( _sdVec.empty() )
1134 ( SMESH_Comment(StdMeshers_ViscousLayers::GetHypType()) << " hypothesis not found",0);
1139 //================================================================================
1143 //================================================================================
1145 bool _ViscousBuilder::findFacesWithLayers()
1147 // collect all faces to ignore defined by hyp
1148 vector<TopoDS_Shape> ignoreFaces;
1149 for ( unsigned i = 0; i < _sdVec.size(); ++i )
1151 vector<TGeomID> ids = _sdVec[i]._hyp->GetBndShapes();
1152 for ( unsigned i = 0; i < ids.size(); ++i )
1154 const TopoDS_Shape& s = getMeshDS()->IndexToShape( ids[i] );
1155 if ( !s.IsNull() && s.ShapeType() == TopAbs_FACE )
1157 _ignoreShapeIds.insert( ids[i] );
1158 ignoreFaces.push_back( s );
1163 // ignore internal faces
1164 SMESH_MesherHelper helper( *_mesh );
1165 TopExp_Explorer exp;
1166 for ( unsigned i = 0; i < _sdVec.size(); ++i )
1168 exp.Init( _sdVec[i]._solid.Oriented( TopAbs_FORWARD ), TopAbs_FACE );
1169 for ( ; exp.More(); exp.Next() )
1171 TGeomID faceInd = getMeshDS()->ShapeToIndex( exp.Current() );
1172 if ( helper.NbAncestors( exp.Current(), *_mesh, TopAbs_SOLID ) > 1 )
1174 _ignoreShapeIds.insert( faceInd );
1175 ignoreFaces.push_back( exp.Current() );
1176 if ( helper.IsReversedSubMesh( TopoDS::Face( exp.Current() )))
1177 _sdVec[i]._reversedFaceIds.insert( faceInd );
1182 // Find faces to shrink mesh on (solution 2 in issue 0020832);
1183 TopTools_IndexedMapOfShape shapes;
1184 for ( unsigned i = 0; i < _sdVec.size(); ++i )
1187 TopExp::MapShapes(_sdVec[i]._solid, TopAbs_EDGE, shapes);
1188 for ( int iE = 1; iE <= shapes.Extent(); ++iE )
1190 const TopoDS_Shape& edge = shapes(iE);
1191 // find 2 faces sharing an edge
1193 PShapeIteratorPtr fIt = helper.GetAncestors(edge, *_mesh, TopAbs_FACE);
1194 while ( fIt->more())
1196 const TopoDS_Shape* f = fIt->next();
1197 if ( helper.IsSubShape( *f, _sdVec[i]._solid))
1198 FF[ int( !FF[0].IsNull()) ] = *f;
1200 if( FF[1].IsNull() ) continue; // seam edge can be shared by 1 FACE only
1201 // check presence of layers on them
1203 for ( int j = 0; j < 2; ++j )
1204 ignore[j] = _ignoreShapeIds.count ( getMeshDS()->ShapeToIndex( FF[j] ));
1205 if ( ignore[0] == ignore[1] ) continue; // nothing interesting
1206 TopoDS_Shape fWOL = FF[ ignore[0] ? 0 : 1 ];
1208 TGeomID edgeInd = getMeshDS()->ShapeToIndex( edge );
1209 _sdVec[i]._shrinkShape2Shape.insert( make_pair( edgeInd, fWOL ));
1212 // Exclude from _shrinkShape2Shape FACE's that can't be shrinked since
1213 // the algo of the SOLID sharing the FACE does not support it
1214 set< string > notSupportAlgos; notSupportAlgos.insert("Hexa_3D");
1215 for ( unsigned i = 0; i < _sdVec.size(); ++i )
1217 TopTools_MapOfShape noShrinkVertices;
1218 map< TGeomID, TopoDS_Shape >::iterator e2f = _sdVec[i]._shrinkShape2Shape.begin();
1219 for ( ; e2f != _sdVec[i]._shrinkShape2Shape.end(); ++e2f )
1221 const TopoDS_Shape& fWOL = e2f->second;
1222 TGeomID edgeID = e2f->first;
1223 bool notShrinkFace = false;
1224 PShapeIteratorPtr soIt = helper.GetAncestors(fWOL, *_mesh, TopAbs_SOLID);
1225 while ( soIt->more())
1227 const TopoDS_Shape* solid = soIt->next();
1228 if ( _sdVec[i]._solid.IsSame( *solid )) continue;
1229 SMESH_Algo* algo = _mesh->GetGen()->GetAlgo( *_mesh, *solid );
1230 if ( !algo || !notSupportAlgos.count( algo->GetName() )) continue;
1231 notShrinkFace = true;
1232 for ( unsigned j = 0; j < _sdVec.size(); ++j )
1234 if ( _sdVec[j]._solid.IsSame( *solid ) )
1235 if ( _sdVec[j]._shrinkShape2Shape.count( edgeID ))
1236 notShrinkFace = false;
1239 if ( notShrinkFace )
1241 _sdVec[i]._noShrinkFaces.insert( getMeshDS()->ShapeToIndex( fWOL ));
1242 for ( TopExp_Explorer vExp( fWOL, TopAbs_VERTEX ); vExp.More(); vExp.Next() )
1243 noShrinkVertices.Add( vExp.Current() );
1246 // erase from _shrinkShape2Shape all srink EDGE's of a SOLID connected
1247 // to the found not shrinked fWOL's
1248 e2f = _sdVec[i]._shrinkShape2Shape.begin();
1249 for ( ; e2f != _sdVec[i]._shrinkShape2Shape.end(); )
1251 TGeomID edgeID = e2f->first;
1252 TopoDS_Vertex VV[2];
1253 TopExp::Vertices( TopoDS::Edge( getMeshDS()->IndexToShape( edgeID )),VV[0],VV[1]);
1254 if ( noShrinkVertices.Contains( VV[0] ) || noShrinkVertices.Contains( VV[1] ))
1256 _sdVec[i]._noShrinkFaces.insert( getMeshDS()->ShapeToIndex( e2f->second ));
1257 _sdVec[i]._shrinkShape2Shape.erase( e2f++ );
1266 // Find the SHAPE along which to inflate _LayerEdge based on VERTEX
1268 for ( unsigned i = 0; i < _sdVec.size(); ++i )
1271 TopExp::MapShapes(_sdVec[i]._solid, TopAbs_VERTEX, shapes);
1272 for ( int iV = 1; iV <= shapes.Extent(); ++iV )
1274 const TopoDS_Shape& vertex = shapes(iV);
1275 // find faces WOL sharing the vertex
1276 vector< TopoDS_Shape > facesWOL;
1277 int totalNbFaces = 0;
1278 PShapeIteratorPtr fIt = helper.GetAncestors(vertex, *_mesh, TopAbs_FACE);
1279 while ( fIt->more())
1281 const TopoDS_Shape* f = fIt->next();
1282 const int fID = getMeshDS()->ShapeToIndex( *f );
1283 if ( helper.IsSubShape( *f, _sdVec[i]._solid ) )
1286 if ( _ignoreShapeIds.count ( fID ) && ! _sdVec[i]._noShrinkFaces.count( fID ))
1287 facesWOL.push_back( *f );
1290 if ( facesWOL.size() == totalNbFaces || facesWOL.empty() )
1291 continue; // no layers at this vertex or no WOL
1292 TGeomID vInd = getMeshDS()->ShapeToIndex( vertex );
1293 switch ( facesWOL.size() )
1297 helper.SetSubShape( facesWOL[0] );
1298 if ( helper.IsRealSeam( vInd )) // inflate along a seam edge?
1300 TopoDS_Shape seamEdge;
1301 PShapeIteratorPtr eIt = helper.GetAncestors(vertex, *_mesh, TopAbs_EDGE);
1302 while ( eIt->more() && seamEdge.IsNull() )
1304 const TopoDS_Shape* e = eIt->next();
1305 if ( helper.IsRealSeam( *e ) )
1308 if ( !seamEdge.IsNull() )
1310 _sdVec[i]._shrinkShape2Shape.insert( make_pair( vInd, seamEdge ));
1314 _sdVec[i]._shrinkShape2Shape.insert( make_pair( vInd, facesWOL[0] ));
1319 // find an edge shared by 2 faces
1320 PShapeIteratorPtr eIt = helper.GetAncestors(vertex, *_mesh, TopAbs_EDGE);
1321 while ( eIt->more())
1323 const TopoDS_Shape* e = eIt->next();
1324 if ( helper.IsSubShape( *e, facesWOL[0]) &&
1325 helper.IsSubShape( *e, facesWOL[1]))
1327 _sdVec[i]._shrinkShape2Shape.insert( make_pair( vInd, *e )); break;
1333 return error("Not yet supported case", _sdVec[i]._index);
1341 //================================================================================
1343 * \brief Create the inner surface of the viscous layer and prepare data for infation
1345 //================================================================================
1347 bool _ViscousBuilder::makeLayer(_SolidData& data)
1349 // get all sub-shapes to make layers on
1350 set<TGeomID> subIds, faceIds;
1351 subIds = data._noShrinkFaces;
1352 TopExp_Explorer exp( data._solid, TopAbs_FACE );
1353 for ( ; exp.More(); exp.Next() )
1354 if ( ! _ignoreShapeIds.count( getMeshDS()->ShapeToIndex( exp.Current() )))
1356 SMESH_subMesh* fSubM = _mesh->GetSubMesh( exp.Current() );
1357 faceIds.insert( fSubM->GetId() );
1358 SMESH_subMeshIteratorPtr subIt =
1359 fSubM->getDependsOnIterator(/*includeSelf=*/true, /*complexShapeFirst=*/false);
1360 while ( subIt->more() )
1361 subIds.insert( subIt->next()->GetId() );
1364 // make a map to find new nodes on sub-shapes shared with other SOLID
1365 map< TGeomID, TNode2Edge* > s2neMap;
1366 map< TGeomID, TNode2Edge* >::iterator s2ne;
1367 map< TGeomID, TopoDS_Shape >::iterator s2s = data._shrinkShape2Shape.begin();
1368 for (; s2s != data._shrinkShape2Shape.end(); ++s2s )
1370 TGeomID shapeInd = s2s->first;
1371 for ( unsigned i = 0; i < _sdVec.size(); ++i )
1373 if ( _sdVec[i]._index == data._index ) continue;
1374 map< TGeomID, TopoDS_Shape >::iterator s2s2 = _sdVec[i]._shrinkShape2Shape.find( shapeInd );
1375 if ( s2s2 != _sdVec[i]._shrinkShape2Shape.end() &&
1376 *s2s == *s2s2 && !_sdVec[i]._n2eMap.empty() )
1378 s2neMap.insert( make_pair( shapeInd, &_sdVec[i]._n2eMap ));
1384 // Create temporary faces and _LayerEdge's
1386 dumpFunction(SMESH_Comment("makeLayers_")<<data._index);
1388 data._stepSize = Precision::Infinite();
1389 data._stepSizeNodes[0] = 0;
1391 SMESH_MesherHelper helper( *_mesh );
1392 helper.SetSubShape( data._solid );
1393 helper.SetElementsOnShape(true);
1395 vector< const SMDS_MeshNode*> newNodes; // of a mesh face
1396 TNode2Edge::iterator n2e2;
1398 // collect _LayerEdge's of shapes they are based on
1399 const int nbShapes = getMeshDS()->MaxShapeIndex();
1400 vector< vector<_LayerEdge*> > edgesByGeom( nbShapes+1 );
1402 for ( set<TGeomID>::iterator id = faceIds.begin(); id != faceIds.end(); ++id )
1404 SMESHDS_SubMesh* smDS = getMeshDS()->MeshElements( *id );
1405 if ( !smDS ) return error(SMESH_Comment("Not meshed face ") << *id, data._index );
1407 const TopoDS_Face& F = TopoDS::Face( getMeshDS()->IndexToShape( *id ));
1408 SMESH_ProxyMesh::SubMesh* proxySub =
1409 data._proxyMesh->getFaceSubM( F, /*create=*/true);
1411 SMDS_ElemIteratorPtr eIt = smDS->GetElements();
1412 while ( eIt->more() )
1414 const SMDS_MeshElement* face = eIt->next();
1415 newNodes.resize( face->NbCornerNodes() );
1416 double faceMaxCosin = -1;
1417 for ( int i = 0 ; i < face->NbCornerNodes(); ++i )
1419 const SMDS_MeshNode* n = face->GetNode(i);
1420 TNode2Edge::iterator n2e = data._n2eMap.insert( make_pair( n, (_LayerEdge*)0 )).first;
1421 if ( !(*n2e).second )
1424 _LayerEdge* edge = new _LayerEdge();
1426 edge->_nodes.push_back( n );
1427 const int shapeID = n->getshapeId();
1428 edgesByGeom[ shapeID ].push_back( edge );
1430 // set edge data or find already refined _LayerEdge and get data from it
1431 if ( n->GetPosition()->GetTypeOfPosition() != SMDS_TOP_FACE &&
1432 ( s2ne = s2neMap.find( shapeID )) != s2neMap.end() &&
1433 ( n2e2 = (*s2ne).second->find( n )) != s2ne->second->end())
1435 _LayerEdge* foundEdge = (*n2e2).second;
1436 edge->Copy( *foundEdge, helper );
1437 // location of the last node is modified but we can restore
1438 // it by node position on _sWOL stored by the node
1439 const_cast< SMDS_MeshNode* >
1440 ( edge->_nodes.back() )->setXYZ( n->X(), n->Y(), n->Z() );
1444 edge->_nodes.push_back( helper.AddNode( n->X(), n->Y(), n->Z() ));
1445 if ( !setEdgeData( *edge, subIds, helper, data ))
1448 dumpMove(edge->_nodes.back());
1449 if ( edge->_cosin > 0.01 )
1451 if ( edge->_cosin > faceMaxCosin )
1452 faceMaxCosin = edge->_cosin;
1455 newNodes[ i ] = n2e->second->_nodes.back();
1457 // create a temporary face
1458 const SMDS_MeshElement* newFace = new TmpMeshFace( newNodes, --_tmpFaceID );
1459 proxySub->AddElement( newFace );
1461 // compute inflation step size by min size of element on a convex surface
1462 if ( faceMaxCosin > 0.1 )
1463 limitStepSize( data, face, faceMaxCosin );
1464 } // loop on 2D elements on a FACE
1465 } // loop on FACEs of a SOLID
1467 data._epsilon = 1e-7;
1468 if ( data._stepSize < 1. )
1469 data._epsilon *= data._stepSize;
1471 // Put _LayerEdge's into the vector data._edges
1473 if ( !sortEdges( data, edgesByGeom ))
1476 // Set target nodes into _Simplex and _2NearEdges
1477 TNode2Edge::iterator n2e;
1478 for ( unsigned i = 0; i < data._edges.size(); ++i )
1480 if ( data._edges[i]->IsOnEdge())
1481 for ( int j = 0; j < 2; ++j )
1483 if ( data._edges[i]->_nodes.back()->NbInverseElements(SMDSAbs_Volume) > 0 )
1484 break; // _LayerEdge is shared by two _SolidData's
1485 const SMDS_MeshNode* & n = data._edges[i]->_2neibors->_nodes[j];
1486 if (( n2e = data._n2eMap.find( n )) == data._n2eMap.end() )
1487 return error("_LayerEdge not found by src node", data._index);
1488 n = (*n2e).second->_nodes.back();
1489 data._edges[i]->_2neibors->_edges[j] = n2e->second;
1492 for ( unsigned j = 0; j < data._edges[i]->_simplices.size(); ++j )
1494 _Simplex& s = data._edges[i]->_simplices[j];
1495 s._nNext = data._n2eMap[ s._nNext ]->_nodes.back();
1496 s._nPrev = data._n2eMap[ s._nPrev ]->_nodes.back();
1504 //================================================================================
1506 * \brief Compute inflation step size by min size of element on a convex surface
1508 //================================================================================
1510 void _ViscousBuilder::limitStepSize( _SolidData& data,
1511 const SMDS_MeshElement* face,
1515 double minSize = 10 * data._stepSize;
1516 const int nbNodes = face->NbCornerNodes();
1517 for ( int i = 0; i < nbNodes; ++i )
1519 const SMDS_MeshNode* nextN = face->GetNode( SMESH_MesherHelper::WrapIndex( i+1, nbNodes ));
1520 const SMDS_MeshNode* curN = face->GetNode( i );
1521 if ( nextN->GetPosition()->GetTypeOfPosition() == SMDS_TOP_FACE ||
1522 curN->GetPosition()->GetTypeOfPosition() == SMDS_TOP_FACE )
1524 double dist = SMESH_TNodeXYZ( face->GetNode(i)).Distance( nextN );
1525 if ( dist < minSize )
1526 minSize = dist, iN = i;
1529 double newStep = 0.8 * minSize / cosin;
1530 if ( newStep < data._stepSize )
1532 data._stepSize = newStep;
1533 data._stepSizeCoeff = 0.8 / cosin;
1534 data._stepSizeNodes[0] = face->GetNode( iN );
1535 data._stepSizeNodes[1] = face->GetNode( SMESH_MesherHelper::WrapIndex( iN+1, nbNodes ));
1539 //================================================================================
1541 * \brief Compute inflation step size by min size of element on a convex surface
1543 //================================================================================
1545 void _ViscousBuilder::limitStepSize( _SolidData& data, const double minSize)
1547 if ( minSize < data._stepSize )
1549 data._stepSize = minSize;
1550 if ( data._stepSizeNodes[0] )
1553 SMESH_TNodeXYZ(data._stepSizeNodes[0]).Distance(data._stepSizeNodes[1]);
1554 data._stepSizeCoeff = data._stepSize / dist;
1559 //================================================================================
1561 * \brief Separate shapes (and _LayerEdge's on them) to smooth from the rest ones
1563 //================================================================================
1565 bool _ViscousBuilder::sortEdges( _SolidData& data,
1566 vector< vector<_LayerEdge*> >& edgesByGeom)
1568 // Find shapes needing smoothing; such a shape has _LayerEdge._normal on it's
1569 // boundry inclined at a sharp angle to the shape
1571 list< TGeomID > shapesToSmooth;
1573 SMESH_MesherHelper helper( *_mesh );
1576 for ( unsigned iS = 0; iS < edgesByGeom.size(); ++iS )
1578 vector<_LayerEdge*>& eS = edgesByGeom[iS];
1579 if ( eS.empty() ) continue;
1580 TopoDS_Shape S = getMeshDS()->IndexToShape( iS );
1581 bool needSmooth = false;
1582 switch ( S.ShapeType() )
1586 bool isShrinkEdge = !eS[0]->_sWOL.IsNull();
1587 for ( TopoDS_Iterator vIt( S ); vIt.More() && !needSmooth; vIt.Next() )
1589 TGeomID iV = getMeshDS()->ShapeToIndex( vIt.Value() );
1590 vector<_LayerEdge*>& eV = edgesByGeom[ iV ];
1591 if ( eV.empty() ) continue;
1592 double cosin = eV[0]->_cosin;
1594 ( !eV[0]->_sWOL.IsNull() && ( eV[0]->_sWOL.ShapeType() == TopAbs_EDGE || !isShrinkEdge));
1598 if ( eV[0]->_sWOL.ShapeType() == TopAbs_EDGE )
1599 dir1 = getEdgeDir( TopoDS::Edge( eV[0]->_sWOL ), TopoDS::Vertex( vIt.Value() ));
1601 dir1 = getFaceDir( TopoDS::Face( eV[0]->_sWOL ), TopoDS::Vertex( vIt.Value() ),
1602 eV[0]->_nodes[0], helper, ok);
1603 dir2 = getEdgeDir( TopoDS::Edge( S ), TopoDS::Vertex( vIt.Value() ));
1604 double angle = dir1.Angle( dir2 );
1605 cosin = cos( angle );
1607 needSmooth = ( cosin > 0.1 );
1613 for ( TopExp_Explorer eExp( S, TopAbs_EDGE ); eExp.More() && !needSmooth; eExp.Next() )
1615 TGeomID iE = getMeshDS()->ShapeToIndex( eExp.Current() );
1616 vector<_LayerEdge*>& eE = edgesByGeom[ iE ];
1617 if ( eE.empty() ) continue;
1618 if ( eE[0]->_sWOL.IsNull() )
1620 for ( unsigned i = 0; i < eE.size() && !needSmooth; ++i )
1621 needSmooth = ( eE[i]->_cosin > 0.1 );
1625 const TopoDS_Face& F1 = TopoDS::Face( S );
1626 const TopoDS_Face& F2 = TopoDS::Face( eE[0]->_sWOL );
1627 const TopoDS_Edge& E = TopoDS::Edge( eExp.Current() );
1628 for ( unsigned i = 0; i < eE.size() && !needSmooth; ++i )
1630 gp_Vec dir1 = getFaceDir( F1, E, eE[i]->_nodes[0], helper, ok );
1631 gp_Vec dir2 = getFaceDir( F2, E, eE[i]->_nodes[0], helper, ok );
1632 double angle = dir1.Angle( dir2 );
1633 double cosin = cos( angle );
1634 needSmooth = ( cosin > 0.1 );
1646 if ( S.ShapeType() == TopAbs_EDGE ) shapesToSmooth.push_front( iS );
1647 else shapesToSmooth.push_back ( iS );
1650 } // loop on edgesByGeom
1652 data._edges.reserve( data._n2eMap.size() );
1653 data._endEdgeToSmooth.clear();
1655 // first we put _LayerEdge's on shapes to smooth
1656 list< TGeomID >::iterator gIt = shapesToSmooth.begin();
1657 for ( ; gIt != shapesToSmooth.end(); ++gIt )
1659 vector<_LayerEdge*>& eVec = edgesByGeom[ *gIt ];
1660 if ( eVec.empty() ) continue;
1661 data._edges.insert( data._edges.end(), eVec.begin(), eVec.end() );
1662 data._endEdgeToSmooth.push_back( data._edges.size() );
1666 // then the rest _LayerEdge's
1667 for ( unsigned iS = 0; iS < edgesByGeom.size(); ++iS )
1669 vector<_LayerEdge*>& eVec = edgesByGeom[iS];
1670 data._edges.insert( data._edges.end(), eVec.begin(), eVec.end() );
1677 //================================================================================
1679 * \brief Set data of _LayerEdge needed for smoothing
1680 * \param subIds - ids of sub-shapes of a SOLID to take into account faces from
1682 //================================================================================
1684 bool _ViscousBuilder::setEdgeData(_LayerEdge& edge,
1685 const set<TGeomID>& subIds,
1686 SMESH_MesherHelper& helper,
1689 SMESH_MeshEditor editor(_mesh);
1691 const SMDS_MeshNode* node = edge._nodes[0]; // source node
1692 SMDS_TypeOfPosition posType = node->GetPosition()->GetTypeOfPosition();
1696 edge._curvature = 0;
1698 // --------------------------
1699 // Compute _normal and _cosin
1700 // --------------------------
1703 edge._normal.SetCoord(0,0,0);
1705 int totalNbFaces = 0;
1707 gp_Vec du, dv, geomNorm;
1710 TGeomID shapeInd = node->getshapeId();
1711 map< TGeomID, TopoDS_Shape >::const_iterator s2s = data._shrinkShape2Shape.find( shapeInd );
1712 bool onShrinkShape ( s2s != data._shrinkShape2Shape.end() );
1713 TopoDS_Shape vertEdge;
1715 if ( onShrinkShape ) // one of faces the node is on has no layers
1717 vertEdge = getMeshDS()->IndexToShape( s2s->first ); // vertex or edge
1718 if ( s2s->second.ShapeType() == TopAbs_EDGE )
1720 // inflate from VERTEX along EDGE
1721 edge._normal = getEdgeDir( TopoDS::Edge( s2s->second ), TopoDS::Vertex( vertEdge ));
1723 else if ( vertEdge.ShapeType() == TopAbs_VERTEX )
1725 // inflate from VERTEX along FACE
1726 edge._normal = getFaceDir( TopoDS::Face( s2s->second ), TopoDS::Vertex( vertEdge ),
1727 node, helper, normOK, &edge._cosin);
1731 // inflate from EDGE along FACE
1732 edge._normal = getFaceDir( TopoDS::Face( s2s->second ), TopoDS::Edge( vertEdge ),
1733 node, helper, normOK);
1736 else // layers are on all faces of SOLID the node is on
1738 // find indices of geom faces the node lies on
1739 set<TGeomID> faceIds;
1740 if ( posType == SMDS_TOP_FACE )
1742 faceIds.insert( node->getshapeId() );
1746 SMDS_ElemIteratorPtr fIt = node->GetInverseElementIterator(SMDSAbs_Face);
1747 while ( fIt->more() )
1748 faceIds.insert( editor.FindShape(fIt->next()));
1751 set<TGeomID>::iterator id = faceIds.begin();
1753 for ( ; id != faceIds.end(); ++id )
1755 const TopoDS_Shape& s = getMeshDS()->IndexToShape( *id );
1756 if ( s.IsNull() || s.ShapeType() != TopAbs_FACE || !subIds.count( *id ))
1759 F = TopoDS::Face( s );
1761 // IDEA: if there is a problem with finding a normal,
1762 // we can compute an area-weighted sum of normals of all faces sharing the node
1763 gp_XY uv = helper.GetNodeUV( F, node, 0, &normOK );
1764 Handle(Geom_Surface) surface = BRep_Tool::Surface( F );
1765 surface->D1( uv.X(), uv.Y(), p, du,dv );
1767 double size2 = geomNorm.SquareMagnitude();
1768 if ( size2 < 1e-10 ) // singularity
1770 SMDS_ElemIteratorPtr fIt = node->GetInverseElementIterator(SMDSAbs_Face);
1771 while ( fIt->more() )
1773 const SMDS_MeshElement* f = fIt->next();
1774 if ( editor.FindShape( f ) == *id )
1776 SMESH_MeshAlgos::FaceNormal( f, (gp_XYZ&) geomNorm.XYZ(), /*normalized=*/false );
1777 size2 = geomNorm.SquareMagnitude();
1781 // double ddu = 0, ddv = 0;
1782 // if ( du.SquareMagnitude() > dv.SquareMagnitude() )
1786 // surface->D1( uv.X()+ddu, uv.Y()+ddv, p, du,dv );
1787 // geomNorm = du ^ dv;
1788 // size2 = geomNorm.SquareMagnitude();
1789 // if ( size2 < 1e-10 )
1791 // surface->D1( uv.X()-ddu, uv.Y()-ddv, p, du,dv );
1792 // geomNorm = du ^ dv;
1793 // size2 = geomNorm.SquareMagnitude();
1796 if ( size2 > numeric_limits<double>::min() )
1797 geomNorm /= sqrt( size2 );
1800 if ( helper.GetSubShapeOri( data._solid, F ) != TopAbs_REVERSED )
1802 edge._normal += geomNorm.XYZ();
1804 if ( totalNbFaces == 0 )
1805 return error(SMESH_Comment("Can't get normal to node ") << node->GetID(), data._index);
1807 edge._normal /= totalNbFaces;
1812 edge._cosin = 0; break;
1814 case SMDS_TOP_EDGE: {
1815 TopoDS_Edge E = TopoDS::Edge( helper.GetSubShapeByNode( node, getMeshDS()));
1816 gp_Vec inFaceDir = getFaceDir( F, E, node, helper, normOK);
1817 double angle = inFaceDir.Angle( edge._normal ); // [0,PI]
1818 edge._cosin = cos( angle );
1819 //cout << "Cosin on EDGE " << edge._cosin << " node " << node->GetID() << endl;
1822 case SMDS_TOP_VERTEX: {
1823 TopoDS_Vertex V = TopoDS::Vertex( helper.GetSubShapeByNode( node, getMeshDS()));
1824 gp_XYZ inFaceDir = getFaceDir( F, V, node, helper, normOK);
1825 double angle = gp_Vec( inFaceDir).Angle( edge._normal ); // [0,PI]
1826 edge._cosin = cos( angle );
1827 //cout << "Cosin on VERTEX " << edge._cosin << " node " << node->GetID() << endl;
1831 return error(SMESH_Comment("Invalid shape position of node ")<<node, data._index);
1835 double normSize = edge._normal.SquareModulus();
1836 if ( normSize < numeric_limits<double>::min() )
1837 return error(SMESH_Comment("Bad normal at node ")<< node->GetID(), data._index );
1839 edge._normal /= sqrt( normSize );
1841 // TODO: if ( !normOK ) then get normal by mesh faces
1843 // Set the rest data
1844 // --------------------
1845 if ( onShrinkShape )
1847 edge._sWOL = (*s2s).second;
1849 SMDS_MeshNode* tgtNode = const_cast<SMDS_MeshNode*>( edge._nodes.back() );
1850 if ( SMESHDS_SubMesh* sm = getMeshDS()->MeshElements( data._solid ))
1851 sm->RemoveNode( tgtNode , /*isNodeDeleted=*/false );
1853 // set initial position which is parameters on _sWOL in this case
1854 if ( edge._sWOL.ShapeType() == TopAbs_EDGE )
1856 double u = helper.GetNodeU( TopoDS::Edge( edge._sWOL ), node, 0, &normOK );
1857 edge._pos.push_back( gp_XYZ( u, 0, 0));
1858 getMeshDS()->SetNodeOnEdge( tgtNode, TopoDS::Edge( edge._sWOL ), u );
1862 gp_XY uv = helper.GetNodeUV( TopoDS::Face( edge._sWOL ), node, 0, &normOK );
1863 edge._pos.push_back( gp_XYZ( uv.X(), uv.Y(), 0));
1864 getMeshDS()->SetNodeOnFace( tgtNode, TopoDS::Face( edge._sWOL ), uv.X(), uv.Y() );
1869 edge._pos.push_back( SMESH_TNodeXYZ( node ));
1871 if ( posType == SMDS_TOP_FACE )
1873 getSimplices( node, edge._simplices, _ignoreShapeIds, &data );
1874 double avgNormProj = 0, avgLen = 0;
1875 for ( unsigned i = 0; i < edge._simplices.size(); ++i )
1877 gp_XYZ vec = edge._pos.back() - SMESH_TNodeXYZ( edge._simplices[i]._nPrev );
1878 avgNormProj += edge._normal * vec;
1879 avgLen += vec.Modulus();
1881 avgNormProj /= edge._simplices.size();
1882 avgLen /= edge._simplices.size();
1883 edge._curvature = _Curvature::New( avgNormProj, avgLen );
1887 // Set neighbour nodes for a _LayerEdge based on EDGE
1889 if ( posType == SMDS_TOP_EDGE /*||
1890 ( onShrinkShape && posType == SMDS_TOP_VERTEX && fabs( edge._cosin ) < 1e-10 )*/)
1892 edge._2neibors = new _2NearEdges;
1893 // target node instead of source ones will be set later
1894 if ( ! findNeiborsOnEdge( &edge,
1895 edge._2neibors->_nodes[0],
1896 edge._2neibors->_nodes[1],
1899 edge.SetDataByNeighbors( edge._2neibors->_nodes[0],
1900 edge._2neibors->_nodes[1],
1904 edge.SetCosin( edge._cosin ); // to update edge._lenFactor
1909 //================================================================================
1911 * \brief Find 2 neigbor nodes of a node on EDGE
1913 //================================================================================
1915 bool _ViscousBuilder::findNeiborsOnEdge(const _LayerEdge* edge,
1916 const SMDS_MeshNode*& n1,
1917 const SMDS_MeshNode*& n2,
1920 const SMDS_MeshNode* node = edge->_nodes[0];
1921 const int shapeInd = node->getshapeId();
1922 SMESHDS_SubMesh* edgeSM = 0;
1923 if ( node->GetPosition()->GetTypeOfPosition() == SMDS_TOP_EDGE )
1926 edgeSM = getMeshDS()->MeshElements( shapeInd );
1927 if ( !edgeSM || edgeSM->NbElements() == 0 )
1928 return error(SMESH_Comment("Not meshed EDGE ") << shapeInd, data._index);
1932 SMDS_ElemIteratorPtr eIt = node->GetInverseElementIterator(SMDSAbs_Edge);
1933 while ( eIt->more() && !n2 )
1935 const SMDS_MeshElement* e = eIt->next();
1936 const SMDS_MeshNode* nNeibor = e->GetNode( 0 );
1937 if ( nNeibor == node ) nNeibor = e->GetNode( 1 );
1940 if (!edgeSM->Contains(e)) continue;
1944 TopoDS_Shape s = SMESH_MesherHelper::GetSubShapeByNode(nNeibor, getMeshDS() );
1945 if ( !SMESH_MesherHelper::IsSubShape( s, edge->_sWOL )) continue;
1947 ( iN++ ? n2 : n1 ) = nNeibor;
1950 return error(SMESH_Comment("Wrongly meshed EDGE ") << shapeInd, data._index);
1954 //================================================================================
1956 * \brief Set _curvature and _2neibors->_plnNorm by 2 neigbor nodes residing the same EDGE
1958 //================================================================================
1960 void _LayerEdge::SetDataByNeighbors( const SMDS_MeshNode* n1,
1961 const SMDS_MeshNode* n2,
1962 SMESH_MesherHelper& helper)
1964 if ( _nodes[0]->GetPosition()->GetTypeOfPosition() != SMDS_TOP_EDGE )
1967 gp_XYZ pos = SMESH_TNodeXYZ( _nodes[0] );
1968 gp_XYZ vec1 = pos - SMESH_TNodeXYZ( n1 );
1969 gp_XYZ vec2 = pos - SMESH_TNodeXYZ( n2 );
1973 double sumLen = vec1.Modulus() + vec2.Modulus();
1974 _2neibors->_wgt[0] = 1 - vec1.Modulus() / sumLen;
1975 _2neibors->_wgt[1] = 1 - vec2.Modulus() / sumLen;
1976 double avgNormProj = 0.5 * ( _normal * vec1 + _normal * vec2 );
1977 double avgLen = 0.5 * ( vec1.Modulus() + vec2.Modulus() );
1978 if ( _curvature ) delete _curvature;
1979 _curvature = _Curvature::New( avgNormProj, avgLen );
1981 // if ( _curvature )
1982 // cout << _nodes[0]->GetID()
1983 // << " CURV r,k: " << _curvature->_r<<","<<_curvature->_k
1984 // << " proj = "<<avgNormProj<< " len = " << avgLen << "| lenDelta(0) = "
1985 // << _curvature->lenDelta(0) << endl;
1990 if ( _sWOL.IsNull() )
1992 TopoDS_Shape S = helper.GetSubShapeByNode( _nodes[0], helper.GetMeshDS() );
1993 gp_XYZ dirE = getEdgeDir( TopoDS::Edge( S ), _nodes[0], helper );
1994 gp_XYZ plnNorm = dirE ^ _normal;
1995 double proj0 = plnNorm * vec1;
1996 double proj1 = plnNorm * vec2;
1997 if ( fabs( proj0 ) > 1e-10 || fabs( proj1 ) > 1e-10 )
1999 if ( _2neibors->_plnNorm ) delete _2neibors->_plnNorm;
2000 _2neibors->_plnNorm = new gp_XYZ( plnNorm.Normalized() );
2005 //================================================================================
2007 * \brief Copy data from a _LayerEdge of other SOLID and based on the same node;
2008 * this and other _LayerEdge's are inflated along a FACE or an EDGE
2010 //================================================================================
2012 void _LayerEdge::Copy( _LayerEdge& other, SMESH_MesherHelper& helper )
2014 _nodes = other._nodes;
2015 _normal = other._normal;
2017 _lenFactor = other._lenFactor;
2018 _cosin = other._cosin;
2019 _sWOL = other._sWOL;
2020 _2neibors = other._2neibors;
2021 _curvature = 0; std::swap( _curvature, other._curvature );
2022 _2neibors = 0; std::swap( _2neibors, other._2neibors );
2024 if ( _sWOL.ShapeType() == TopAbs_EDGE )
2026 double u = helper.GetNodeU( TopoDS::Edge( _sWOL ), _nodes[0] );
2027 _pos.push_back( gp_XYZ( u, 0, 0));
2031 gp_XY uv = helper.GetNodeUV( TopoDS::Face( _sWOL ), _nodes[0]);
2032 _pos.push_back( gp_XYZ( uv.X(), uv.Y(), 0));
2036 //================================================================================
2038 * \brief Set _cosin and _lenFactor
2040 //================================================================================
2042 void _LayerEdge::SetCosin( double cosin )
2045 _lenFactor = ( _cosin > 0.1 ) ? 1./sqrt(1-_cosin*_cosin) : 1.0;
2048 //================================================================================
2050 * \brief Fills a vector<_Simplex >
2052 //================================================================================
2054 void _ViscousBuilder::getSimplices( const SMDS_MeshNode* node,
2055 vector<_Simplex>& simplices,
2056 const set<TGeomID>& ingnoreShapes,
2057 const _SolidData* dataToCheckOri,
2061 SMDS_ElemIteratorPtr fIt = node->GetInverseElementIterator(SMDSAbs_Face);
2062 while ( fIt->more() )
2064 const SMDS_MeshElement* f = fIt->next();
2065 const TGeomID shapeInd = f->getshapeId();
2066 if ( ingnoreShapes.count( shapeInd )) continue;
2067 const int nbNodes = f->NbCornerNodes();
2068 const int srcInd = f->GetNodeIndex( node );
2069 const SMDS_MeshNode* nPrev = f->GetNode( SMESH_MesherHelper::WrapIndex( srcInd-1, nbNodes ));
2070 const SMDS_MeshNode* nNext = f->GetNode( SMESH_MesherHelper::WrapIndex( srcInd+1, nbNodes ));
2071 const SMDS_MeshNode* nOpp = f->GetNode( SMESH_MesherHelper::WrapIndex( srcInd+2, nbNodes ));
2072 if ( dataToCheckOri && dataToCheckOri->_reversedFaceIds.count( shapeInd ))
2073 std::swap( nPrev, nNext );
2074 simplices.push_back( _Simplex( nPrev, nNext, nOpp ));
2079 vector<_Simplex> sortedSimplices( simplices.size() );
2080 sortedSimplices[0] = simplices[0];
2082 for ( size_t i = 1; i < simplices.size(); ++i )
2084 for ( size_t j = 1; j < simplices.size(); ++j )
2085 if ( sortedSimplices[i-1]._nNext == simplices[j]._nPrev )
2087 sortedSimplices[i] = simplices[j];
2092 if ( nbFound == simplices.size() - 1 )
2093 simplices.swap( sortedSimplices );
2097 //================================================================================
2099 * \brief DEBUG. Create groups contating temorary data of _LayerEdge's
2101 //================================================================================
2103 void _ViscousBuilder::makeGroupOfLE()
2106 for ( unsigned i = 0 ; i < _sdVec.size(); ++i )
2108 if ( _sdVec[i]._edges.empty() ) continue;
2109 // string name = SMESH_Comment("_LayerEdge's_") << i;
2111 // SMESH_Group* g = _mesh->AddGroup(SMDSAbs_Edge, name.c_str(), id );
2112 // SMESHDS_Group* gDS = (SMESHDS_Group*)g->GetGroupDS();
2113 // SMESHDS_Mesh* mDS = _mesh->GetMeshDS();
2115 dumpFunction( SMESH_Comment("make_LayerEdge_") << i );
2116 for ( unsigned j = 0 ; j < _sdVec[i]._edges.size(); ++j )
2118 _LayerEdge* le = _sdVec[i]._edges[j];
2119 for ( unsigned iN = 1; iN < le->_nodes.size(); ++iN )
2120 dumpCmd(SMESH_Comment("mesh.AddEdge([ ") <<le->_nodes[iN-1]->GetID()
2121 << ", " << le->_nodes[iN]->GetID() <<"])");
2122 //gDS->SMDSGroup().Add( mDS->AddEdge( le->_nodes[iN-1], le->_nodes[iN]));
2126 dumpFunction( SMESH_Comment("makeNormals") << i );
2127 for ( unsigned j = 0 ; j < _sdVec[i]._edges.size(); ++j )
2129 _LayerEdge& edge = *_sdVec[i]._edges[j];
2130 SMESH_TNodeXYZ nXYZ( edge._nodes[0] );
2131 nXYZ += edge._normal * _sdVec[i]._stepSize;
2132 dumpCmd(SMESH_Comment("mesh.AddEdge([ ") <<edge._nodes[0]->GetID()
2133 << ", mesh.AddNode( " << nXYZ.X()<<","<< nXYZ.Y()<<","<< nXYZ.Z()<<")])");
2137 // name = SMESH_Comment("tmp_faces ") << i;
2138 // g = _mesh->AddGroup(SMDSAbs_Face, name.c_str(), id );
2139 // gDS = (SMESHDS_Group*)g->GetGroupDS();
2140 // SMESH_MeshEditor editor( _mesh );
2141 dumpFunction( SMESH_Comment("makeTmpFaces_") << i );
2142 TopExp_Explorer fExp( _sdVec[i]._solid, TopAbs_FACE );
2143 for ( ; fExp.More(); fExp.Next() )
2145 if (const SMESHDS_SubMesh* sm = _sdVec[i]._proxyMesh->GetProxySubMesh( fExp.Current()))
2147 SMDS_ElemIteratorPtr fIt = sm->GetElements();
2148 while ( fIt->more())
2150 const SMDS_MeshElement* e = fIt->next();
2151 SMESH_Comment cmd("mesh.AddFace([");
2152 for ( int j=0; j < e->NbCornerNodes(); ++j )
2153 cmd << e->GetNode(j)->GetID() << (j+1<e->NbCornerNodes() ? ",": "])");
2155 //vector<const SMDS_MeshNode*> nodes( e->begin_nodes(), e->end_nodes() );
2156 //gDS->SMDSGroup().Add( editor.AddElement( nodes, e->GetType(), e->IsPoly()));
2165 //================================================================================
2167 * \brief Increase length of _LayerEdge's to reach the required thickness of layers
2169 //================================================================================
2171 bool _ViscousBuilder::inflate(_SolidData& data)
2173 SMESH_MesherHelper helper( *_mesh );
2175 // Limit inflation step size by geometry size found by itersecting
2176 // normals of _LayerEdge's with mesh faces
2177 double geomSize = Precision::Infinite(), intersecDist;
2178 auto_ptr<SMESH_ElementSearcher> searcher
2179 ( SMESH_MeshAlgos::GetElementSearcher( *getMeshDS(),
2180 data._proxyMesh->GetFaces( data._solid )) );
2181 for ( unsigned i = 0; i < data._edges.size(); ++i )
2183 if ( data._edges[i]->IsOnEdge() ) continue;
2184 data._edges[i]->FindIntersection( *searcher, intersecDist, data._epsilon );
2185 if ( geomSize > intersecDist && intersecDist > 0 )
2186 geomSize = intersecDist;
2188 if ( data._stepSize > 0.3 * geomSize )
2189 limitStepSize( data, 0.3 * geomSize );
2191 const double tgtThick = data._hyp->GetTotalThickness();
2192 if ( data._stepSize > tgtThick )
2193 limitStepSize( data, tgtThick );
2195 if ( data._stepSize < 1. )
2196 data._epsilon = data._stepSize * 1e-7;
2199 cout << "-- geomSize = " << geomSize << ", stepSize = " << data._stepSize << endl;
2202 double avgThick = 0, curThick = 0, distToIntersection = Precision::Infinite();
2203 int nbSteps = 0, nbRepeats = 0;
2204 while ( 1.01 * avgThick < tgtThick )
2206 // new target length
2207 curThick += data._stepSize;
2208 if ( curThick > tgtThick )
2210 curThick = tgtThick + ( tgtThick-avgThick ) * nbRepeats;
2214 // Elongate _LayerEdge's
2215 dumpFunction(SMESH_Comment("inflate")<<data._index<<"_step"<<nbSteps); // debug
2216 for ( unsigned i = 0; i < data._edges.size(); ++i )
2218 data._edges[i]->SetNewLength( curThick, helper );
2223 if ( !updateNormals( data, helper ) )
2226 // Improve and check quality
2227 if ( !smoothAndCheck( data, nbSteps, distToIntersection ))
2231 dumpFunction(SMESH_Comment("invalidate")<<data._index<<"_step"<<nbSteps); // debug
2232 for ( unsigned i = 0; i < data._edges.size(); ++i )
2234 data._edges[i]->InvalidateStep( nbSteps+1 );
2238 break; // no more inflating possible
2242 // Evaluate achieved thickness
2244 for ( unsigned i = 0; i < data._edges.size(); ++i )
2245 avgThick += data._edges[i]->_len;
2246 avgThick /= data._edges.size();
2248 cout << "-- Thickness " << avgThick << " reached" << endl;
2251 if ( distToIntersection < avgThick*1.5 )
2254 cout << "-- Stop inflation since distToIntersection( "<<distToIntersection<<" ) < avgThick( "
2255 << avgThick << " ) * 1.5" << endl;
2260 limitStepSize( data, 0.25 * distToIntersection );
2261 if ( data._stepSizeNodes[0] )
2262 data._stepSize = data._stepSizeCoeff *
2263 SMESH_TNodeXYZ(data._stepSizeNodes[0]).Distance(data._stepSizeNodes[1]);
2267 return error("failed at the very first inflation step", data._index);
2272 //================================================================================
2274 * \brief Improve quality of layer inner surface and check intersection
2276 //================================================================================
2278 bool _ViscousBuilder::smoothAndCheck(_SolidData& data,
2280 double & distToIntersection)
2282 if ( data._endEdgeToSmooth.empty() )
2283 return true; // no shapes needing smoothing
2285 bool moved, improved;
2287 SMESH_MesherHelper helper(*_mesh);
2288 Handle(Geom_Surface) surface;
2292 for ( unsigned iS = 0; iS < data._endEdgeToSmooth.size(); ++iS )
2295 iEnd = data._endEdgeToSmooth[ iS ];
2297 if ( !data._edges[ iBeg ]->_sWOL.IsNull() &&
2298 data._edges[ iBeg ]->_sWOL.ShapeType() == TopAbs_FACE )
2300 if ( !F.IsSame( data._edges[ iBeg ]->_sWOL )) {
2301 F = TopoDS::Face( data._edges[ iBeg ]->_sWOL );
2302 helper.SetSubShape( F );
2303 surface = BRep_Tool::Surface( F );
2308 F.Nullify(); surface.Nullify();
2310 TGeomID sInd = data._edges[ iBeg ]->_nodes[0]->getshapeId();
2312 if ( data._edges[ iBeg ]->IsOnEdge() )
2314 dumpFunction(SMESH_Comment("smooth")<<data._index << "_Ed"<<sInd <<"_InfStep"<<nbSteps);
2316 // try a simple solution on an analytic EDGE
2317 if ( !smoothAnalyticEdge( data, iBeg, iEnd, surface, F, helper ))
2323 for ( int i = iBeg; i < iEnd; ++i )
2325 moved |= data._edges[i]->SmoothOnEdge(surface, F, helper);
2327 dumpCmd( SMESH_Comment("# end step ")<<step);
2329 while ( moved && step++ < 5 );
2330 //cout << " NB STEPS: " << step << endl;
2337 int step = 0, badNb = 0; moved = true;
2338 while (( ++step <= 5 && moved ) || improved )
2340 dumpFunction(SMESH_Comment("smooth")<<data._index<<"_Fa"<<sInd
2341 <<"_InfStep"<<nbSteps<<"_"<<step); // debug
2342 int oldBadNb = badNb;
2345 for ( int i = iBeg; i < iEnd; ++i )
2346 moved |= data._edges[i]->Smooth(badNb);
2347 improved = ( badNb < oldBadNb );
2354 for ( int i = iBeg; i < iEnd; ++i )
2356 _LayerEdge* edge = data._edges[i];
2357 SMESH_TNodeXYZ tgtXYZ( edge->_nodes.back() );
2358 for ( unsigned j = 0; j < edge->_simplices.size(); ++j )
2359 if ( !edge->_simplices[j].IsForward( edge->_nodes[0], &tgtXYZ ))
2361 cout << "Bad simplex ( " << edge->_nodes[0]->GetID()<< " "<< tgtXYZ._node->GetID()
2362 << " "<< edge->_simplices[j]._nPrev->GetID()
2363 << " "<< edge->_simplices[j]._nNext->GetID() << " )" << endl;
2371 } // loop on shapes to smooth
2373 // Check if the last segments of _LayerEdge intersects 2D elements;
2374 // checked elements are either temporary faces or faces on surfaces w/o the layers
2376 auto_ptr<SMESH_ElementSearcher> searcher
2377 ( SMESH_MeshAlgos::GetElementSearcher( *getMeshDS(),
2378 data._proxyMesh->GetFaces( data._solid )) );
2380 distToIntersection = Precision::Infinite();
2382 const SMDS_MeshElement* intFace = 0;
2384 const SMDS_MeshElement* closestFace = 0;
2387 for ( unsigned i = 0; i < data._edges.size(); ++i )
2389 if ( data._edges[i]->FindIntersection( *searcher, dist, data._epsilon, &intFace ))
2391 if ( distToIntersection > dist )
2393 distToIntersection = dist;
2396 closestFace = intFace;
2403 SMDS_MeshElement::iterator nIt = closestFace->begin_nodes();
2404 cout << "Shortest distance: _LayerEdge nodes: tgt " << data._edges[iLE]->_nodes.back()->GetID()
2405 << " src " << data._edges[iLE]->_nodes[0]->GetID()<< ", intersection with face ("
2406 << (*nIt++)->GetID()<<" "<< (*nIt++)->GetID()<<" "<< (*nIt++)->GetID()
2407 << ") distance = " << distToIntersection<< endl;
2414 //================================================================================
2416 * \brief Return a curve of the EDGE to be used for smoothing and arrange
2417 * _LayerEdge's to be in a consequent order
2419 //================================================================================
2421 Handle(Geom_Curve) _SolidData::CurveForSmooth( const TopoDS_Edge& E,
2424 Handle(Geom_Surface)& surface,
2425 const TopoDS_Face& F,
2426 SMESH_MesherHelper& helper)
2428 TGeomID eIndex = helper.GetMeshDS()->ShapeToIndex( E );
2430 map< TGeomID, Handle(Geom_Curve)>::iterator i2curve = _edge2curve.find( eIndex );
2432 if ( i2curve == _edge2curve.end() )
2434 // sort _LayerEdge's by position on the EDGE
2436 map< double, _LayerEdge* > u2edge;
2437 for ( int i = iFrom; i < iTo; ++i )
2438 u2edge.insert( make_pair( helper.GetNodeU( E, _edges[i]->_nodes[0] ), _edges[i] ));
2440 ASSERT( u2edge.size() == iTo - iFrom );
2441 map< double, _LayerEdge* >::iterator u2e = u2edge.begin();
2442 for ( int i = iFrom; i < iTo; ++i, ++u2e )
2443 _edges[i] = u2e->second;
2445 // set _2neibors according to the new order
2446 for ( int i = iFrom; i < iTo-1; ++i )
2447 if ( _edges[i]->_2neibors->_nodes[1] != _edges[i+1]->_nodes.back() )
2448 _edges[i]->_2neibors->reverse();
2449 if ( u2edge.size() > 1 &&
2450 _edges[iTo-1]->_2neibors->_nodes[0] != _edges[iTo-2]->_nodes.back() )
2451 _edges[iTo-1]->_2neibors->reverse();
2454 SMESHDS_SubMesh* smDS = helper.GetMeshDS()->MeshElements( eIndex );
2456 TopLoc_Location loc; double f,l;
2458 Handle(Geom_Line) line;
2459 Handle(Geom_Circle) circle;
2460 bool isLine, isCirc;
2461 if ( F.IsNull() ) // 3D case
2463 // check if the EDGE is a line
2464 Handle(Geom_Curve) curve = BRep_Tool::Curve( E, loc, f, l);
2465 if ( curve->IsKind( STANDARD_TYPE( Geom_TrimmedCurve )))
2466 curve = Handle(Geom_TrimmedCurve)::DownCast( curve )->BasisCurve();
2468 line = Handle(Geom_Line)::DownCast( curve );
2469 circle = Handle(Geom_Circle)::DownCast( curve );
2470 isLine = (!line.IsNull());
2471 isCirc = (!circle.IsNull());
2473 if ( !isLine && !isCirc ) // Check if the EDGE is close to a line
2476 SMDS_NodeIteratorPtr nIt = smDS->GetNodes();
2477 while ( nIt->more() )
2478 bndBox.Add( SMESH_TNodeXYZ( nIt->next() ));
2479 gp_XYZ size = bndBox.CornerMax() - bndBox.CornerMin();
2481 SMESH_TNodeXYZ p0( _edges[iFrom]->_2neibors->_nodes[0] );
2482 SMESH_TNodeXYZ p1( _edges[iFrom]->_2neibors->_nodes[1] );
2483 const double lineTol = 1e-2 * ( p0 - p1 ).Modulus();
2484 for ( int i = 0; i < 3 && !isLine; ++i )
2485 isLine = ( size.Coord( i+1 ) <= lineTol );
2487 if ( !isLine && !isCirc && iTo-iFrom > 2) // Check if the EDGE is close to a circle
2494 // check if the EDGE is a line
2495 Handle(Geom2d_Curve) curve = BRep_Tool::CurveOnSurface( E, F, f, l);
2496 if ( curve->IsKind( STANDARD_TYPE( Geom2d_TrimmedCurve )))
2497 curve = Handle(Geom2d_TrimmedCurve)::DownCast( curve )->BasisCurve();
2499 Handle(Geom2d_Line) line2d = Handle(Geom2d_Line)::DownCast( curve );
2500 Handle(Geom2d_Circle) circle2d = Handle(Geom2d_Circle)::DownCast( curve );
2501 isLine = (!line2d.IsNull());
2502 isCirc = (!circle2d.IsNull());
2504 if ( !isLine && !isCirc) // Check if the EDGE is close to a line
2507 SMDS_NodeIteratorPtr nIt = smDS->GetNodes();
2508 while ( nIt->more() )
2509 bndBox.Add( helper.GetNodeUV( F, nIt->next() ));
2510 gp_XY size = bndBox.CornerMax() - bndBox.CornerMin();
2512 const double lineTol = 1e-2 * sqrt( bndBox.SquareExtent() );
2513 for ( int i = 0; i < 2 && !isLine; ++i )
2514 isLine = ( size.Coord( i+1 ) <= lineTol );
2516 if ( !isLine && !isCirc && iTo-iFrom > 2) // Check if the EDGE is close to a circle
2522 line = new Geom_Line( gp::OX() ); // only type does matter
2526 gp_Pnt2d p = circle2d->Location();
2527 gp_Ax2 ax( gp_Pnt( p.X(), p.Y(), 0), gp::DX());
2528 circle = new Geom_Circle( ax, 1.); // only center position does matter
2532 Handle(Geom_Curve)& res = _edge2curve[ eIndex ];
2540 return i2curve->second;
2543 //================================================================================
2545 * \brief smooth _LayerEdge's on a staight EDGE or circular EDGE
2547 //================================================================================
2549 bool _ViscousBuilder::smoothAnalyticEdge( _SolidData& data,
2552 Handle(Geom_Surface)& surface,
2553 const TopoDS_Face& F,
2554 SMESH_MesherHelper& helper)
2556 TopoDS_Shape S = helper.GetSubShapeByNode( data._edges[ iFrom ]->_nodes[0],
2557 helper.GetMeshDS());
2558 TopoDS_Edge E = TopoDS::Edge( S );
2560 Handle(Geom_Curve) curve = data.CurveForSmooth( E, iFrom, iTo, surface, F, helper );
2561 if ( curve.IsNull() ) return false;
2563 // compute a relative length of segments
2564 vector< double > len( iTo-iFrom+1 );
2566 double curLen, prevLen = len[0] = 1.0;
2567 for ( int i = iFrom; i < iTo; ++i )
2569 curLen = prevLen * data._edges[i]->_2neibors->_wgt[0] / data._edges[i]->_2neibors->_wgt[1];
2570 len[i-iFrom+1] = len[i-iFrom] + curLen;
2575 if ( curve->IsKind( STANDARD_TYPE( Geom_Line )))
2577 if ( F.IsNull() ) // 3D
2579 SMESH_TNodeXYZ p0( data._edges[iFrom]->_2neibors->_nodes[0]);
2580 SMESH_TNodeXYZ p1( data._edges[iTo-1]->_2neibors->_nodes[1]);
2581 for ( int i = iFrom; i < iTo; ++i )
2583 double r = len[i-iFrom] / len.back();
2584 gp_XYZ newPos = p0 * ( 1. - r ) + p1 * r;
2585 data._edges[i]->_pos.back() = newPos;
2586 SMDS_MeshNode* tgtNode = const_cast<SMDS_MeshNode*>( data._edges[i]->_nodes.back() );
2587 tgtNode->setXYZ( newPos.X(), newPos.Y(), newPos.Z() );
2588 dumpMove( tgtNode );
2593 gp_XY uv0 = helper.GetNodeUV( F, data._edges[iFrom]->_2neibors->_nodes[0]);
2594 gp_XY uv1 = helper.GetNodeUV( F, data._edges[iTo-1]->_2neibors->_nodes[1]);
2595 if ( data._edges[iFrom]->_2neibors->_nodes[0] ==
2596 data._edges[iTo-1]->_2neibors->_nodes[1] ) // closed edge
2598 int iPeriodic = helper.GetPeriodicIndex();
2599 if ( iPeriodic == 1 || iPeriodic == 2 )
2601 uv1.SetCoord( iPeriodic, helper.GetOtherParam( uv1.Coord( iPeriodic )));
2602 if ( uv0.Coord( iPeriodic ) > uv1.Coord( iPeriodic ))
2603 std::swap( uv0, uv1 );
2606 const gp_XY rangeUV = uv1 - uv0;
2607 for ( int i = iFrom; i < iTo; ++i )
2609 double r = len[i-iFrom] / len.back();
2610 gp_XY newUV = uv0 + r * rangeUV;
2611 data._edges[i]->_pos.back().SetCoord( newUV.X(), newUV.Y(), 0 );
2613 gp_Pnt newPos = surface->Value( newUV.X(), newUV.Y() );
2614 SMDS_MeshNode* tgtNode = const_cast<SMDS_MeshNode*>( data._edges[i]->_nodes.back() );
2615 tgtNode->setXYZ( newPos.X(), newPos.Y(), newPos.Z() );
2616 dumpMove( tgtNode );
2618 SMDS_FacePosition* pos = static_cast<SMDS_FacePosition*>( tgtNode->GetPosition() );
2619 pos->SetUParameter( newUV.X() );
2620 pos->SetVParameter( newUV.Y() );
2626 if ( curve->IsKind( STANDARD_TYPE( Geom_Circle )))
2628 Handle(Geom_Circle) circle = Handle(Geom_Circle)::DownCast( curve );
2629 gp_Pnt center3D = circle->Location();
2631 if ( F.IsNull() ) // 3D
2633 if ( data._edges[iFrom]->_2neibors->_nodes[0] ==
2634 data._edges[iTo-1]->_2neibors->_nodes[1] )
2635 return true; // closed EDGE - nothing to do
2637 return false; // TODO ???
2641 const gp_XY center( center3D.X(), center3D.Y() );
2643 gp_XY uv0 = helper.GetNodeUV( F, data._edges[iFrom]->_2neibors->_nodes[0]);
2644 gp_XY uvM = helper.GetNodeUV( F, data._edges[iFrom]->_nodes.back());
2645 gp_XY uv1 = helper.GetNodeUV( F, data._edges[iTo-1]->_2neibors->_nodes[1]);
2646 gp_Vec2d vec0( center, uv0 );
2647 gp_Vec2d vecM( center, uvM );
2648 gp_Vec2d vec1( center, uv1 );
2649 double uLast = vec0.Angle( vec1 ); // -PI - +PI
2650 double uMidl = vec0.Angle( vecM );
2651 if ( uLast * uMidl < 0. )
2652 uLast += ( uMidl > 0 ? +2. : -2. ) * M_PI;
2653 const double radius = 0.5 * ( vec0.Magnitude() + vec1.Magnitude() );
2655 gp_Ax2d axis( center, vec0 );
2656 gp_Circ2d circ( axis, radius );
2657 for ( int i = iFrom; i < iTo; ++i )
2659 double newU = uLast * len[i-iFrom] / len.back();
2660 gp_Pnt2d newUV = ElCLib::Value( newU, circ );
2661 data._edges[i]->_pos.back().SetCoord( newUV.X(), newUV.Y(), 0 );
2663 gp_Pnt newPos = surface->Value( newUV.X(), newUV.Y() );
2664 SMDS_MeshNode* tgtNode = const_cast<SMDS_MeshNode*>( data._edges[i]->_nodes.back() );
2665 tgtNode->setXYZ( newPos.X(), newPos.Y(), newPos.Z() );
2666 dumpMove( tgtNode );
2668 SMDS_FacePosition* pos = static_cast<SMDS_FacePosition*>( tgtNode->GetPosition() );
2669 pos->SetUParameter( newUV.X() );
2670 pos->SetVParameter( newUV.Y() );
2679 //================================================================================
2681 * \brief Modify normals of _LayerEdge's on EDGE's to avoid intersection with
2682 * _LayerEdge's on neighbor EDGE's
2684 //================================================================================
2686 bool _ViscousBuilder::updateNormals( _SolidData& data,
2687 SMESH_MesherHelper& helper )
2689 // make temporary quadrangles got by extrusion of
2690 // mesh edges along _LayerEdge._normal's
2692 vector< const SMDS_MeshElement* > tmpFaces;
2694 set< SMESH_TLink > extrudedLinks; // contains target nodes
2695 vector< const SMDS_MeshNode*> nodes(4); // of a tmp mesh face
2697 dumpFunction(SMESH_Comment("makeTmpFacesOnEdges")<<data._index);
2698 for ( unsigned i = 0; i < data._edges.size(); ++i )
2700 _LayerEdge* edge = data._edges[i];
2701 if ( !edge->IsOnEdge() || !edge->_sWOL.IsNull() ) continue;
2702 const SMDS_MeshNode* tgt1 = edge->_nodes.back();
2703 for ( int j = 0; j < 2; ++j ) // loop on _2NearEdges
2705 const SMDS_MeshNode* tgt2 = edge->_2neibors->_nodes[j];
2706 pair< set< SMESH_TLink >::iterator, bool > link_isnew =
2707 extrudedLinks.insert( SMESH_TLink( tgt1, tgt2 ));
2708 if ( !link_isnew.second )
2710 extrudedLinks.erase( link_isnew.first );
2711 continue; // already extruded and will no more encounter
2713 // look for a _LayerEdge containg tgt2
2714 // _LayerEdge* neiborEdge = 0;
2715 // unsigned di = 0; // check _edges[i+di] and _edges[i-di]
2716 // while ( !neiborEdge && ++di <= data._edges.size() )
2718 // if ( i+di < data._edges.size() && data._edges[i+di]->_nodes.back() == tgt2 )
2719 // neiborEdge = data._edges[i+di];
2720 // else if ( di <= i && data._edges[i-di]->_nodes.back() == tgt2 )
2721 // neiborEdge = data._edges[i-di];
2723 // if ( !neiborEdge )
2724 // return error("updateNormals(): neighbor _LayerEdge not found", data._index);
2725 _LayerEdge* neiborEdge = edge->_2neibors->_edges[j];
2727 TmpMeshFaceOnEdge* f = new TmpMeshFaceOnEdge( edge, neiborEdge, --_tmpFaceID );
2728 tmpFaces.push_back( f );
2730 dumpCmd(SMESH_Comment("mesh.AddFace([ ")
2731 <<f->_nn[0]->GetID()<<", "<<f->_nn[1]->GetID()<<", "
2732 <<f->_nn[2]->GetID()<<", "<<f->_nn[3]->GetID()<<" ])");
2737 // Check if _LayerEdge's based on EDGE's intersects tmpFaces.
2738 // Perform two loops on _LayerEdge on EDGE's:
2739 // 1) to find and fix intersection
2740 // 2) to check that no new intersection appears as result of 1)
2742 SMDS_ElemIteratorPtr fIt( new SMDS_ElementVectorIterator( tmpFaces.begin(),
2744 auto_ptr<SMESH_ElementSearcher> searcher
2745 ( SMESH_MeshAlgos::GetElementSearcher( *getMeshDS(), fIt ));
2747 // 1) Find intersections
2749 const SMDS_MeshElement* face;
2750 typedef map< _LayerEdge*, set< _LayerEdge*, _LayerEdgeCmp >, _LayerEdgeCmp > TLEdge2LEdgeSet;
2751 TLEdge2LEdgeSet edge2CloseEdge;
2753 const double eps = data._epsilon * data._epsilon;
2754 for ( unsigned i = 0; i < data._edges.size(); ++i )
2756 _LayerEdge* edge = data._edges[i];
2757 if ( !edge->IsOnEdge() || !edge->_sWOL.IsNull() ) continue;
2758 if ( edge->FindIntersection( *searcher, dist, eps, &face ))
2760 const TmpMeshFaceOnEdge* f = (const TmpMeshFaceOnEdge*) face;
2761 set< _LayerEdge*, _LayerEdgeCmp > & ee = edge2CloseEdge[ edge ];
2762 ee.insert( f->_le1 );
2763 ee.insert( f->_le2 );
2764 if ( f->_le1->IsOnEdge() && f->_le1->_sWOL.IsNull() )
2765 edge2CloseEdge[ f->_le1 ].insert( edge );
2766 if ( f->_le2->IsOnEdge() && f->_le2->_sWOL.IsNull() )
2767 edge2CloseEdge[ f->_le2 ].insert( edge );
2771 // Set _LayerEdge._normal
2773 if ( !edge2CloseEdge.empty() )
2775 dumpFunction(SMESH_Comment("updateNormals")<<data._index);
2777 TLEdge2LEdgeSet::iterator e2ee = edge2CloseEdge.begin();
2778 for ( ; e2ee != edge2CloseEdge.end(); ++e2ee )
2780 _LayerEdge* edge1 = e2ee->first;
2781 _LayerEdge* edge2 = 0;
2782 set< _LayerEdge*, _LayerEdgeCmp >& ee = e2ee->second;
2784 // find EDGEs the edges reside
2786 TopoDS_Shape S = helper.GetSubShapeByNode( edge1->_nodes[0], getMeshDS() );
2787 if ( S.ShapeType() != TopAbs_EDGE )
2788 continue; // TODO: find EDGE by VERTEX
2789 E1 = TopoDS::Edge( S );
2790 set< _LayerEdge*, _LayerEdgeCmp >::iterator eIt = ee.begin();
2791 while ( E2.IsNull() && eIt != ee.end())
2793 _LayerEdge* e2 = *eIt++;
2794 TopoDS_Shape S = helper.GetSubShapeByNode( e2->_nodes[0], getMeshDS() );
2795 if ( S.ShapeType() == TopAbs_EDGE )
2796 E2 = TopoDS::Edge( S ), edge2 = e2;
2798 if ( E2.IsNull() ) continue; // TODO: find EDGE by VERTEX
2800 // find 3 FACEs sharing 2 EDGEs
2802 TopoDS_Face FF1[2], FF2[2];
2803 PShapeIteratorPtr fIt = helper.GetAncestors(E1, *_mesh, TopAbs_FACE);
2804 while ( fIt->more() && FF1[1].IsNull())
2806 const TopoDS_Face *F = (const TopoDS_Face*) fIt->next();
2807 if ( helper.IsSubShape( *F, data._solid))
2808 FF1[ FF1[0].IsNull() ? 0 : 1 ] = *F;
2810 fIt = helper.GetAncestors(E2, *_mesh, TopAbs_FACE);
2811 while ( fIt->more() && FF2[1].IsNull())
2813 const TopoDS_Face *F = (const TopoDS_Face*) fIt->next();
2814 if ( helper.IsSubShape( *F, data._solid))
2815 FF2[ FF2[0].IsNull() ? 0 : 1 ] = *F;
2817 // exclude a FACE common to E1 and E2 (put it at [1] in FF* )
2818 if ( FF1[0].IsSame( FF2[0]) || FF1[0].IsSame( FF2[1]))
2819 std::swap( FF1[0], FF1[1] );
2820 if ( FF2[0].IsSame( FF1[0]) )
2821 std::swap( FF2[0], FF2[1] );
2822 if ( FF1[0].IsNull() || FF2[0].IsNull() )
2825 // // get a new normal for edge1
2827 gp_Vec dir1 = edge1->_normal, dir2 = edge2->_normal;
2828 if ( edge1->_cosin < 0 )
2829 dir1 = getFaceDir( FF1[0], E1, edge1->_nodes[0], helper, ok ).Normalized();
2830 if ( edge2->_cosin < 0 )
2831 dir2 = getFaceDir( FF2[0], E2, edge2->_nodes[0], helper, ok ).Normalized();
2832 // gp_Vec dir1 = getFaceDir( FF1[0], E1, edge1->_nodes[0], helper, ok );
2833 // gp_Vec dir2 = getFaceDir( FF2[0], E2, edge2->_nodes[0], helper, ok2 );
2834 // double wgt1 = ( edge1->_cosin + 1 ) / ( edge1->_cosin + edge2->_cosin + 2 );
2835 // double wgt2 = ( edge2->_cosin + 1 ) / ( edge1->_cosin + edge2->_cosin + 2 );
2836 // gp_Vec newNorm = wgt1 * dir1 + wgt2 * dir2;
2837 // newNorm.Normalize();
2839 double wgt1 = ( edge1->_cosin + 1 ) / ( edge1->_cosin + edge2->_cosin + 2 );
2840 double wgt2 = ( edge2->_cosin + 1 ) / ( edge1->_cosin + edge2->_cosin + 2 );
2841 gp_Vec newNorm = wgt1 * dir1 + wgt2 * dir2;
2842 newNorm.Normalize();
2844 edge1->_normal = newNorm.XYZ();
2846 // update data of edge1 depending on _normal
2847 const SMDS_MeshNode *n1, *n2;
2848 n1 = edge1->_2neibors->_edges[0]->_nodes[0];
2849 n2 = edge1->_2neibors->_edges[1]->_nodes[0];
2850 //if ( !findNeiborsOnEdge( edge1, n1, n2, data ))
2852 edge1->SetDataByNeighbors( n1, n2, helper );
2854 if ( edge1->_cosin < 0 )
2857 getFaceDir( FF1[0], E1, edge1->_nodes[0], helper, ok );
2858 double angle = dir1.Angle( edge1->_normal ); // [0,PI]
2859 edge1->SetCosin( cos( angle ));
2861 // limit data._stepSize
2862 if ( edge1->_cosin > 0.1 )
2864 SMDS_ElemIteratorPtr fIt = edge1->_nodes[0]->GetInverseElementIterator(SMDSAbs_Face);
2865 while ( fIt->more() )
2866 limitStepSize( data, fIt->next(), edge1->_cosin );
2868 // set new XYZ of target node
2869 edge1->InvalidateStep( 1 );
2871 edge1->SetNewLength( data._stepSize, helper );
2874 // Update normals and other dependent data of not intersecting _LayerEdge's
2875 // neighboring the intersecting ones
2877 for ( e2ee = edge2CloseEdge.begin(); e2ee != edge2CloseEdge.end(); ++e2ee )
2879 _LayerEdge* edge1 = e2ee->first;
2880 if ( !edge1->_2neibors )
2882 for ( int j = 0; j < 2; ++j ) // loop on 2 neighbors
2884 _LayerEdge* neighbor = edge1->_2neibors->_edges[j];
2885 if ( edge2CloseEdge.count ( neighbor ))
2886 continue; // j-th neighbor is also intersected
2887 _LayerEdge* prevEdge = edge1;
2888 const int nbSteps = 6;
2889 for ( int step = nbSteps; step; --step ) // step from edge1 in j-th direction
2891 if ( !neighbor->_2neibors )
2892 break; // neighbor is on VERTEX
2894 _LayerEdge* nextEdge = neighbor->_2neibors->_edges[iNext];
2895 if ( nextEdge == prevEdge )
2896 nextEdge = neighbor->_2neibors->_edges[ ++iNext ];
2897 // const double& wgtPrev = neighbor->_2neibors->_wgt[1-iNext];
2898 // const double& wgtNext = neighbor->_2neibors->_wgt[iNext];
2899 double r = double(step-1)/nbSteps;
2900 if ( !nextEdge->_2neibors )
2903 gp_XYZ newNorm = prevEdge->_normal * r + nextEdge->_normal * (1-r);
2904 newNorm.Normalize();
2906 neighbor->_normal = newNorm;
2907 neighbor->SetCosin( prevEdge->_cosin * r + nextEdge->_cosin * (1-r) );
2908 neighbor->SetDataByNeighbors( prevEdge->_nodes[0], nextEdge->_nodes[0], helper );
2910 neighbor->InvalidateStep( 1 );
2912 neighbor->SetNewLength( data._stepSize, helper );
2914 // goto the next neighbor
2915 prevEdge = neighbor;
2916 neighbor = nextEdge;
2922 // 2) Check absence of intersections
2925 for ( unsigned i = 0 ; i < tmpFaces.size(); ++i )
2931 //================================================================================
2933 * \brief Looks for intersection of it's last segment with faces
2934 * \param distance - returns shortest distance from the last node to intersection
2936 //================================================================================
2938 bool _LayerEdge::FindIntersection( SMESH_ElementSearcher& searcher,
2940 const double& epsilon,
2941 const SMDS_MeshElement** face)
2943 vector< const SMDS_MeshElement* > suspectFaces;
2945 gp_Ax1 lastSegment = LastSegment(segLen);
2946 searcher.GetElementsNearLine( lastSegment, SMDSAbs_Face, suspectFaces );
2948 bool segmentIntersected = false;
2949 distance = Precision::Infinite();
2950 int iFace = -1; // intersected face
2951 for ( unsigned j = 0 ; j < suspectFaces.size() && !segmentIntersected; ++j )
2953 const SMDS_MeshElement* face = suspectFaces[j];
2954 if ( face->GetNodeIndex( _nodes.back() ) >= 0 ||
2955 face->GetNodeIndex( _nodes[0] ) >= 0 )
2956 continue; // face sharing _LayerEdge node
2957 const int nbNodes = face->NbCornerNodes();
2958 bool intFound = false;
2960 SMDS_MeshElement::iterator nIt = face->begin_nodes();
2963 intFound = SegTriaInter( lastSegment, *nIt++, *nIt++, *nIt++, dist, epsilon );
2967 const SMDS_MeshNode* tria[3];
2970 for ( int n2 = 2; n2 < nbNodes && !intFound; ++n2 )
2973 intFound = SegTriaInter(lastSegment, tria[0], tria[1], tria[2], dist, epsilon );
2979 if ( dist < segLen*(1.01) && dist > -(_len-segLen) )
2980 segmentIntersected = true;
2981 if ( distance > dist )
2982 distance = dist, iFace = j;
2985 if ( iFace != -1 && face ) *face = suspectFaces[iFace];
2986 // if ( distance && iFace > -1 )
2988 // // distance is used to limit size of inflation step which depends on
2989 // // whether the intersected face bears viscous layers or not
2990 // bool faceHasVL = suspectFaces[iFace]->GetID() < 1;
2994 if ( segmentIntersected )
2997 SMDS_MeshElement::iterator nIt = suspectFaces[iFace]->begin_nodes();
2998 gp_XYZ intP( lastSegment.Location().XYZ() + lastSegment.Direction().XYZ() * distance );
2999 cout << "nodes: tgt " << _nodes.back()->GetID() << " src " << _nodes[0]->GetID()
3000 << ", intersection with face ("
3001 << (*nIt++)->GetID()<<" "<< (*nIt++)->GetID()<<" "<< (*nIt++)->GetID()
3002 << ") at point (" << intP.X() << ", " << intP.Y() << ", " << intP.Z()
3003 << ") distance = " << distance - segLen<< endl;
3009 return segmentIntersected;
3012 //================================================================================
3014 * \brief Returns size and direction of the last segment
3016 //================================================================================
3018 gp_Ax1 _LayerEdge::LastSegment(double& segLen) const
3020 // find two non-coincident positions
3021 gp_XYZ orig = _pos.back();
3023 int iPrev = _pos.size() - 2;
3024 while ( iPrev >= 0 )
3026 dir = orig - _pos[iPrev];
3027 if ( dir.SquareModulus() > 1e-100 )
3037 segDir.SetLocation( SMESH_TNodeXYZ( _nodes[0] ));
3038 segDir.SetDirection( _normal );
3043 gp_Pnt pPrev = _pos[ iPrev ];
3044 if ( !_sWOL.IsNull() )
3046 TopLoc_Location loc;
3047 if ( _sWOL.ShapeType() == TopAbs_EDGE )
3050 Handle(Geom_Curve) curve = BRep_Tool::Curve( TopoDS::Edge( _sWOL ), loc, f,l);
3051 pPrev = curve->Value( pPrev.X() ).Transformed( loc );
3055 Handle(Geom_Surface) surface = BRep_Tool::Surface( TopoDS::Face(_sWOL), loc );
3056 pPrev = surface->Value( pPrev.X(), pPrev.Y() ).Transformed( loc );
3058 dir = SMESH_TNodeXYZ( _nodes.back() ) - pPrev.XYZ();
3060 segDir.SetLocation( pPrev );
3061 segDir.SetDirection( dir );
3062 segLen = dir.Modulus();
3068 //================================================================================
3070 * \brief Test intersection of the last segment with a given triangle
3071 * using Moller-Trumbore algorithm
3072 * Intersection is detected if distance to intersection is less than _LayerEdge._len
3074 //================================================================================
3076 bool _LayerEdge::SegTriaInter( const gp_Ax1& lastSegment,
3077 const SMDS_MeshNode* n0,
3078 const SMDS_MeshNode* n1,
3079 const SMDS_MeshNode* n2,
3081 const double& EPSILON) const
3083 //const double EPSILON = 1e-6;
3085 gp_XYZ orig = lastSegment.Location().XYZ();
3086 gp_XYZ dir = lastSegment.Direction().XYZ();
3088 SMESH_TNodeXYZ vert0( n0 );
3089 SMESH_TNodeXYZ vert1( n1 );
3090 SMESH_TNodeXYZ vert2( n2 );
3092 /* calculate distance from vert0 to ray origin */
3093 gp_XYZ tvec = orig - vert0;
3095 if ( tvec * dir > EPSILON )
3096 // intersected face is at back side of the temporary face this _LayerEdge belongs to
3099 gp_XYZ edge1 = vert1 - vert0;
3100 gp_XYZ edge2 = vert2 - vert0;
3102 /* begin calculating determinant - also used to calculate U parameter */
3103 gp_XYZ pvec = dir ^ edge2;
3105 /* if determinant is near zero, ray lies in plane of triangle */
3106 double det = edge1 * pvec;
3108 if (det > -EPSILON && det < EPSILON)
3110 double inv_det = 1.0 / det;
3112 /* calculate U parameter and test bounds */
3113 double u = ( tvec * pvec ) * inv_det;
3114 if (u < 0.0 || u > 1.0)
3117 /* prepare to test V parameter */
3118 gp_XYZ qvec = tvec ^ edge1;
3120 /* calculate V parameter and test bounds */
3121 double v = (dir * qvec) * inv_det;
3122 if ( v < 0.0 || u + v > 1.0 )
3125 /* calculate t, ray intersects triangle */
3126 t = (edge2 * qvec) * inv_det;
3128 // if (det < EPSILON)
3131 // /* calculate distance from vert0 to ray origin */
3132 // gp_XYZ tvec = orig - vert0;
3134 // /* calculate U parameter and test bounds */
3135 // double u = tvec * pvec;
3136 // if (u < 0.0 || u > det)
3139 // /* prepare to test V parameter */
3140 // gp_XYZ qvec = tvec ^ edge1;
3142 // /* calculate V parameter and test bounds */
3143 // double v = dir * qvec;
3144 // if (v < 0.0 || u + v > det)
3147 // /* calculate t, scale parameters, ray intersects triangle */
3148 // double t = edge2 * qvec;
3149 // double inv_det = 1.0 / det;
3157 //================================================================================
3159 * \brief Perform smooth of _LayerEdge's based on EDGE's
3160 * \retval bool - true if node has been moved
3162 //================================================================================
3164 bool _LayerEdge::SmoothOnEdge(Handle(Geom_Surface)& surface,
3165 const TopoDS_Face& F,
3166 SMESH_MesherHelper& helper)
3168 ASSERT( IsOnEdge() );
3170 SMDS_MeshNode* tgtNode = const_cast<SMDS_MeshNode*>( _nodes.back() );
3171 SMESH_TNodeXYZ oldPos( tgtNode );
3172 double dist01, distNewOld;
3174 SMESH_TNodeXYZ p0( _2neibors->_nodes[0]);
3175 SMESH_TNodeXYZ p1( _2neibors->_nodes[1]);
3176 dist01 = p0.Distance( _2neibors->_nodes[1] );
3178 gp_Pnt newPos = p0 * _2neibors->_wgt[0] + p1 * _2neibors->_wgt[1];
3179 double lenDelta = 0;
3182 //lenDelta = _curvature->lenDelta( _len );
3183 lenDelta = _curvature->lenDeltaByDist( dist01 );
3184 newPos.ChangeCoord() += _normal * lenDelta;
3187 distNewOld = newPos.Distance( oldPos );
3191 if ( _2neibors->_plnNorm )
3193 // put newPos on the plane defined by source node and _plnNorm
3194 gp_XYZ new2src = SMESH_TNodeXYZ( _nodes[0] ) - newPos.XYZ();
3195 double new2srcProj = (*_2neibors->_plnNorm) * new2src;
3196 newPos.ChangeCoord() += (*_2neibors->_plnNorm) * new2srcProj;
3198 tgtNode->setXYZ( newPos.X(), newPos.Y(), newPos.Z() );
3199 _pos.back() = newPos.XYZ();
3203 tgtNode->setXYZ( newPos.X(), newPos.Y(), newPos.Z() );
3204 gp_XY uv( Precision::Infinite(), 0 );
3205 helper.CheckNodeUV( F, tgtNode, uv, 1e-10, /*force=*/true );
3206 _pos.back().SetCoord( uv.X(), uv.Y(), 0 );
3208 newPos = surface->Value( uv.X(), uv.Y() );
3209 tgtNode->setXYZ( newPos.X(), newPos.Y(), newPos.Z() );
3212 if ( _curvature && lenDelta < 0 )
3214 gp_Pnt prevPos( _pos[ _pos.size()-2 ]);
3215 _len -= prevPos.Distance( oldPos );
3216 _len += prevPos.Distance( newPos );
3218 bool moved = distNewOld > dist01/50;
3220 dumpMove( tgtNode ); // debug
3225 //================================================================================
3227 * \brief Perform laplacian smooth in 3D of nodes inflated from FACE
3228 * \retval bool - true if _tgtNode has been moved
3230 //================================================================================
3232 bool _LayerEdge::Smooth(int& badNb)
3234 if ( _simplices.size() < 2 )
3235 return false; // _LayerEdge inflated along EDGE or FACE
3237 // compute new position for the last _pos
3238 gp_XYZ newPos (0,0,0);
3239 for ( unsigned i = 0; i < _simplices.size(); ++i )
3240 newPos += SMESH_TNodeXYZ( _simplices[i]._nPrev );
3241 newPos /= _simplices.size();
3244 newPos += _normal * _curvature->lenDelta( _len );
3246 gp_Pnt prevPos( _pos[ _pos.size()-2 ]);
3247 // if ( _cosin < -0.1)
3249 // // Avoid decreasing length of edge on concave surface
3250 // //gp_Vec oldMove( _pos[ _pos.size()-2 ], _pos.back() );
3251 // gp_Vec newMove( prevPos, newPos );
3252 // newPos = _pos.back() + newMove.XYZ();
3254 // else if ( _cosin > 0.3 )
3256 // // Avoid increasing length of edge too much
3259 // count quality metrics (orientation) of tetras around _tgtNode
3261 SMESH_TNodeXYZ tgtXYZ( _nodes.back() );
3262 for ( unsigned i = 0; i < _simplices.size(); ++i )
3263 nbOkBefore += _simplices[i].IsForward( _nodes[0], &tgtXYZ );
3266 for ( unsigned i = 0; i < _simplices.size(); ++i )
3267 nbOkAfter += _simplices[i].IsForward( _nodes[0], &newPos );
3269 if ( nbOkAfter < nbOkBefore )
3272 SMDS_MeshNode* n = const_cast< SMDS_MeshNode* >( _nodes.back() );
3274 _len -= prevPos.Distance(SMESH_TNodeXYZ( n ));
3275 _len += prevPos.Distance(newPos);
3277 n->setXYZ( newPos.X(), newPos.Y(), newPos.Z());
3278 _pos.back() = newPos;
3280 badNb += _simplices.size() - nbOkAfter;
3287 //================================================================================
3289 * \brief Add a new segment to _LayerEdge during inflation
3291 //================================================================================
3293 void _LayerEdge::SetNewLength( double len, SMESH_MesherHelper& helper )
3295 if ( _len - len > -1e-6 )
3297 _pos.push_back( _pos.back() );
3301 SMDS_MeshNode* n = const_cast< SMDS_MeshNode*>( _nodes.back() );
3302 SMESH_TNodeXYZ oldXYZ( n );
3303 gp_XYZ nXYZ = oldXYZ + _normal * ( len - _len ) * _lenFactor;
3304 n->setXYZ( nXYZ.X(), nXYZ.Y(), nXYZ.Z() );
3306 _pos.push_back( nXYZ );
3308 if ( !_sWOL.IsNull() )
3311 if ( _sWOL.ShapeType() == TopAbs_EDGE )
3313 double u = Precision::Infinite(); // to force projection w/o distance check
3314 helper.CheckNodeU( TopoDS::Edge( _sWOL ), n, u, 1e-10, /*force=*/true, distXYZ );
3315 _pos.back().SetCoord( u, 0, 0 );
3316 SMDS_EdgePosition* pos = static_cast<SMDS_EdgePosition*>( n->GetPosition() );
3317 pos->SetUParameter( u );
3321 gp_XY uv( Precision::Infinite(), 0 );
3322 helper.CheckNodeUV( TopoDS::Face( _sWOL ), n, uv, 1e-10, /*force=*/true, distXYZ );
3323 _pos.back().SetCoord( uv.X(), uv.Y(), 0 );
3324 SMDS_FacePosition* pos = static_cast<SMDS_FacePosition*>( n->GetPosition() );
3325 pos->SetUParameter( uv.X() );
3326 pos->SetVParameter( uv.Y() );
3328 n->setXYZ( distXYZ[1], distXYZ[2], distXYZ[3]);
3330 dumpMove( n ); //debug
3333 //================================================================================
3335 * \brief Remove last inflation step
3337 //================================================================================
3339 void _LayerEdge::InvalidateStep( int curStep )
3341 if ( _pos.size() > curStep )
3343 _pos.resize( curStep );
3344 gp_Pnt nXYZ = _pos.back();
3345 SMDS_MeshNode* n = const_cast< SMDS_MeshNode*>( _nodes.back() );
3346 if ( !_sWOL.IsNull() )
3348 TopLoc_Location loc;
3349 if ( _sWOL.ShapeType() == TopAbs_EDGE )
3351 SMDS_EdgePosition* pos = static_cast<SMDS_EdgePosition*>( n->GetPosition() );
3352 pos->SetUParameter( nXYZ.X() );
3354 Handle(Geom_Curve) curve = BRep_Tool::Curve( TopoDS::Edge( _sWOL ), loc, f,l);
3355 nXYZ = curve->Value( nXYZ.X() ).Transformed( loc );
3359 SMDS_FacePosition* pos = static_cast<SMDS_FacePosition*>( n->GetPosition() );
3360 pos->SetUParameter( nXYZ.X() );
3361 pos->SetVParameter( nXYZ.Y() );
3362 Handle(Geom_Surface) surface = BRep_Tool::Surface( TopoDS::Face(_sWOL), loc );
3363 nXYZ = surface->Value( nXYZ.X(), nXYZ.Y() ).Transformed( loc );
3366 n->setXYZ( nXYZ.X(), nXYZ.Y(), nXYZ.Z() );
3371 //================================================================================
3373 * \brief Create layers of prisms
3375 //================================================================================
3377 bool _ViscousBuilder::refine(_SolidData& data)
3379 SMESH_MesherHelper helper( *_mesh );
3380 helper.SetSubShape( data._solid );
3381 helper.SetElementsOnShape(false);
3383 Handle(Geom_Curve) curve;
3384 Handle(Geom_Surface) surface;
3385 TopoDS_Edge geomEdge;
3386 TopoDS_Face geomFace;
3387 TopLoc_Location loc;
3388 double f,l, u/*, distXYZ[4]*/;
3392 for ( unsigned i = 0; i < data._edges.size(); ++i )
3394 _LayerEdge& edge = *data._edges[i];
3396 // get accumulated length of segments
3397 vector< double > segLen( edge._pos.size() );
3399 for ( unsigned j = 1; j < edge._pos.size(); ++j )
3400 segLen[j] = segLen[j-1] + (edge._pos[j-1] - edge._pos[j] ).Modulus();
3402 // allocate memory for new nodes if it is not yet refined
3403 const SMDS_MeshNode* tgtNode = edge._nodes.back();
3404 if ( edge._nodes.size() == 2 )
3406 edge._nodes.resize( data._hyp->GetNumberLayers() + 1, 0 );
3408 edge._nodes.back() = tgtNode;
3410 if ( !edge._sWOL.IsNull() )
3412 isOnEdge = ( edge._sWOL.ShapeType() == TopAbs_EDGE );
3413 // restore position of the last node
3417 geomEdge = TopoDS::Edge( edge._sWOL );
3418 curve = BRep_Tool::Curve( geomEdge, loc, f,l);
3419 // double u = helper.GetNodeU( tgtNode );
3420 // p = curve->Value( u );
3424 geomFace = TopoDS::Face( edge._sWOL );
3425 surface = BRep_Tool::Surface( geomFace, loc );
3426 // gp_XY uv = helper.GetNodeUV( tgtNode );
3427 // p = surface->Value( uv.X(), uv.Y() );
3429 // p.Transform( loc );
3430 // const_cast< SMDS_MeshNode* >( tgtNode )->setXYZ( p.X(), p.Y(), p.Z() );
3432 // calculate height of the first layer
3434 const double T = segLen.back(); //data._hyp.GetTotalThickness();
3435 const double f = data._hyp->GetStretchFactor();
3436 const int N = data._hyp->GetNumberLayers();
3437 const double fPowN = pow( f, N );
3438 if ( fPowN - 1 <= numeric_limits<double>::min() )
3441 h0 = T * ( f - 1 )/( fPowN - 1 );
3443 const double zeroLen = std::numeric_limits<double>::min();
3445 // create intermediate nodes
3446 double hSum = 0, hi = h0/f;
3448 for ( unsigned iStep = 1; iStep < edge._nodes.size(); ++iStep )
3450 // compute an intermediate position
3453 while ( hSum > segLen[iSeg] && iSeg < segLen.size()-1)
3455 int iPrevSeg = iSeg-1;
3456 while ( fabs( segLen[iPrevSeg] - segLen[iSeg]) <= zeroLen && iPrevSeg > 0 )
3458 double r = ( segLen[iSeg] - hSum ) / ( segLen[iSeg] - segLen[iPrevSeg] );
3459 gp_Pnt pos = r * edge._pos[iPrevSeg] + (1-r) * edge._pos[iSeg];
3461 SMDS_MeshNode*& node = const_cast< SMDS_MeshNode*& >(edge._nodes[ iStep ]);
3462 if ( !edge._sWOL.IsNull() )
3464 // compute XYZ by parameters <pos>
3468 pos = curve->Value( u ).Transformed(loc);
3472 uv.SetCoord( pos.X(), pos.Y() );
3473 pos = surface->Value( pos.X(), pos.Y() ).Transformed(loc);
3476 // create or update the node
3479 node = helper.AddNode( pos.X(), pos.Y(), pos.Z());
3480 if ( !edge._sWOL.IsNull() )
3483 getMeshDS()->SetNodeOnEdge( node, geomEdge, u );
3485 getMeshDS()->SetNodeOnFace( node, geomFace, uv.X(), uv.Y() );
3489 getMeshDS()->SetNodeInVolume( node, helper.GetSubShapeID() );
3494 if ( !edge._sWOL.IsNull() )
3496 // make average pos from new and current parameters
3499 u = 0.5 * ( u + helper.GetNodeU( geomEdge, node ));
3500 pos = curve->Value( u ).Transformed(loc);
3504 uv = 0.5 * ( uv + helper.GetNodeUV( geomFace, node ));
3505 pos = surface->Value( uv.X(), uv.Y()).Transformed(loc);
3508 node->setXYZ( pos.X(), pos.Y(), pos.Z() );
3513 if ( !getMeshDS()->IsEmbeddedMode() )
3514 // Log node movement
3515 for ( unsigned i = 0; i < data._edges.size(); ++i )
3517 _LayerEdge& edge = *data._edges[i];
3518 SMESH_TNodeXYZ p ( edge._nodes.back() );
3519 getMeshDS()->MoveNode( p._node, p.X(), p.Y(), p.Z() );
3522 // TODO: make quadratic prisms and polyhedrons(?)
3524 helper.SetElementsOnShape(true);
3526 TopExp_Explorer exp( data._solid, TopAbs_FACE );
3527 for ( ; exp.More(); exp.Next() )
3529 if ( _ignoreShapeIds.count( getMeshDS()->ShapeToIndex( exp.Current() )))
3531 SMESHDS_SubMesh* fSubM = getMeshDS()->MeshElements( exp.Current() );
3532 SMDS_ElemIteratorPtr fIt = fSubM->GetElements();
3533 vector< vector<const SMDS_MeshNode*>* > nnVec;
3534 while ( fIt->more() )
3536 const SMDS_MeshElement* face = fIt->next();
3537 int nbNodes = face->NbCornerNodes();
3538 nnVec.resize( nbNodes );
3539 SMDS_ElemIteratorPtr nIt = face->nodesIterator();
3540 for ( int iN = 0; iN < nbNodes; ++iN )
3542 const SMDS_MeshNode* n = static_cast<const SMDS_MeshNode*>( nIt->next() );
3543 nnVec[ iN ] = & data._n2eMap[ n ]->_nodes;
3546 int nbZ = nnVec[0]->size();
3550 for ( int iZ = 1; iZ < nbZ; ++iZ )
3551 helper.AddVolume( (*nnVec[0])[iZ-1], (*nnVec[1])[iZ-1], (*nnVec[2])[iZ-1],
3552 (*nnVec[0])[iZ], (*nnVec[1])[iZ], (*nnVec[2])[iZ]);
3555 for ( int iZ = 1; iZ < nbZ; ++iZ )
3556 helper.AddVolume( (*nnVec[0])[iZ-1], (*nnVec[1])[iZ-1],
3557 (*nnVec[2])[iZ-1], (*nnVec[3])[iZ-1],
3558 (*nnVec[0])[iZ], (*nnVec[1])[iZ],
3559 (*nnVec[2])[iZ], (*nnVec[3])[iZ]);
3562 return error("Not supported type of element", data._index);
3569 //================================================================================
3571 * \brief Shrink 2D mesh on faces to let space for inflated layers
3573 //================================================================================
3575 bool _ViscousBuilder::shrink()
3577 // make map of (ids of FACEs to shrink mesh on) to (_SolidData containing _LayerEdge's
3578 // inflated along FACE or EDGE)
3579 map< TGeomID, _SolidData* > f2sdMap;
3580 for ( unsigned i = 0 ; i < _sdVec.size(); ++i )
3582 _SolidData& data = _sdVec[i];
3583 TopTools_MapOfShape FFMap;
3584 map< TGeomID, TopoDS_Shape >::iterator s2s = data._shrinkShape2Shape.begin();
3585 for (; s2s != data._shrinkShape2Shape.end(); ++s2s )
3586 if ( s2s->second.ShapeType() == TopAbs_FACE )
3588 f2sdMap.insert( make_pair( getMeshDS()->ShapeToIndex( s2s->second ), &data ));
3590 if ( FFMap.Add( (*s2s).second ))
3591 // Put mesh faces on the shrinked FACE to the proxy sub-mesh to avoid
3592 // usage of mesh faces made in addBoundaryElements() by the 3D algo or
3593 // by StdMeshers_QuadToTriaAdaptor
3594 if ( SMESHDS_SubMesh* smDS = getMeshDS()->MeshElements( s2s->second ))
3596 SMESH_ProxyMesh::SubMesh* proxySub =
3597 data._proxyMesh->getFaceSubM( TopoDS::Face( s2s->second ), /*create=*/true);
3598 SMDS_ElemIteratorPtr fIt = smDS->GetElements();
3599 while ( fIt->more() )
3600 proxySub->AddElement( fIt->next() );
3601 // as a result 3D algo will use elements from proxySub and not from smDS
3606 SMESH_MesherHelper helper( *_mesh );
3607 helper.ToFixNodeParameters( true );
3610 map< TGeomID, _Shrinker1D > e2shrMap;
3612 // loop on FACES to srink mesh on
3613 map< TGeomID, _SolidData* >::iterator f2sd = f2sdMap.begin();
3614 for ( ; f2sd != f2sdMap.end(); ++f2sd )
3616 _SolidData& data = *f2sd->second;
3617 TNode2Edge& n2eMap = data._n2eMap;
3618 const TopoDS_Face& F = TopoDS::Face( getMeshDS()->IndexToShape( f2sd->first ));
3620 Handle(Geom_Surface) surface = BRep_Tool::Surface(F);
3622 SMESH_subMesh* sm = _mesh->GetSubMesh( F );
3623 SMESHDS_SubMesh* smDS = sm->GetSubMeshDS();
3625 helper.SetSubShape(F);
3627 // ===========================
3628 // Prepare data for shrinking
3629 // ===========================
3631 // Collect nodes to smooth, as src nodes are not yet replaced by tgt ones
3632 // and thus all nodes on a FACE connected to 2d elements are to be smoothed
3633 vector < const SMDS_MeshNode* > smoothNodes;
3635 SMDS_NodeIteratorPtr nIt = smDS->GetNodes();
3636 while ( nIt->more() )
3638 const SMDS_MeshNode* n = nIt->next();
3639 if ( n->NbInverseElements( SMDSAbs_Face ) > 0 )
3640 smoothNodes.push_back( n );
3643 // Find out face orientation
3645 const set<TGeomID> ignoreShapes;
3647 if ( !smoothNodes.empty() )
3649 vector<_Simplex> simplices;
3650 getSimplices( smoothNodes[0], simplices, ignoreShapes );
3651 helper.GetNodeUV( F, simplices[0]._nPrev, 0, &isOkUV ); // fix UV of silpmex nodes
3652 helper.GetNodeUV( F, simplices[0]._nNext, 0, &isOkUV );
3653 gp_XY uv = helper.GetNodeUV( F, smoothNodes[0], 0, &isOkUV );
3654 if ( !simplices[0].IsForward(uv, smoothNodes[0], F, helper,refSign) )
3658 // Find _LayerEdge's inflated along F
3659 vector< _LayerEdge* > lEdges;
3661 SMESH_subMeshIteratorPtr subIt =
3662 sm->getDependsOnIterator(/*includeSelf=*/false, /*complexShapeFirst=*/false);
3663 while ( subIt->more() )
3665 SMESH_subMesh* sub = subIt->next();
3666 SMESHDS_SubMesh* subDS = sub->GetSubMeshDS();
3667 if ( subDS->NbNodes() == 0 || !n2eMap.count( subDS->GetNodes()->next() ))
3669 SMDS_NodeIteratorPtr nIt = subDS->GetNodes();
3670 while ( nIt->more() )
3672 _LayerEdge* edge = n2eMap[ nIt->next() ];
3673 lEdges.push_back( edge );
3674 prepareEdgeToShrink( *edge, F, helper, smDS );
3679 dumpFunction(SMESH_Comment("beforeShrinkFace")<<f2sd->first); // debug
3680 SMDS_ElemIteratorPtr fIt = smDS->GetElements();
3681 while ( fIt->more() )
3682 if ( const SMDS_MeshElement* f = fIt->next() )
3683 dumpChangeNodes( f );
3685 // Replace source nodes by target nodes in mesh faces to shrink
3686 const SMDS_MeshNode* nodes[20];
3687 for ( unsigned i = 0; i < lEdges.size(); ++i )
3689 _LayerEdge& edge = *lEdges[i];
3690 const SMDS_MeshNode* srcNode = edge._nodes[0];
3691 const SMDS_MeshNode* tgtNode = edge._nodes.back();
3692 SMDS_ElemIteratorPtr fIt = srcNode->GetInverseElementIterator(SMDSAbs_Face);
3693 while ( fIt->more() )
3695 const SMDS_MeshElement* f = fIt->next();
3696 if ( !smDS->Contains( f ))
3698 SMDS_NodeIteratorPtr nIt = f->nodeIterator();
3699 for ( int iN = 0; nIt->more(); ++iN )
3701 const SMDS_MeshNode* n = nIt->next();
3702 nodes[iN] = ( n == srcNode ? tgtNode : n );
3704 helper.GetMeshDS()->ChangeElementNodes( f, nodes, f->NbNodes() );
3708 // find out if a FACE is concave
3709 const bool isConcaveFace = isConcave( F, helper );
3711 // Create _SmoothNode's on face F
3712 vector< _SmoothNode > nodesToSmooth( smoothNodes.size() );
3714 const bool sortSimplices = isConcaveFace;
3715 for ( unsigned i = 0; i < smoothNodes.size(); ++i )
3717 const SMDS_MeshNode* n = smoothNodes[i];
3718 nodesToSmooth[ i ]._node = n;
3719 // src nodes must be replaced by tgt nodes to have tgt nodes in _simplices
3720 getSimplices( n, nodesToSmooth[ i ]._simplices, ignoreShapes, NULL, sortSimplices );
3721 // fix up incorrect uv of nodes on the FACE
3722 helper.GetNodeUV( F, n, 0, &isOkUV);
3726 //if ( nodesToSmooth.empty() ) continue;
3728 // Find EDGE's to shrink and set simpices to LayerEdge's
3729 set< _Shrinker1D* > eShri1D;
3731 for ( unsigned i = 0; i < lEdges.size(); ++i )
3733 _LayerEdge* edge = lEdges[i];
3734 if ( edge->_sWOL.ShapeType() == TopAbs_EDGE )
3736 TGeomID edgeIndex = getMeshDS()->ShapeToIndex( edge->_sWOL );
3737 _Shrinker1D& srinker = e2shrMap[ edgeIndex ];
3738 eShri1D.insert( & srinker );
3739 srinker.AddEdge( edge, helper );
3740 VISCOUS_3D::ToClearSubWithMain( _mesh->GetSubMesh( edge->_sWOL ), data._solid );
3741 // restore params of nodes on EGDE if the EDGE has been already
3742 // srinked while srinking another FACE
3743 srinker.RestoreParams();
3745 getSimplices( /*tgtNode=*/edge->_nodes.back(), edge->_simplices, ignoreShapes );
3749 bool toFixTria = false; // to improve quality of trias by diagonal swap
3750 if ( isConcaveFace )
3752 const bool hasTria = _mesh->NbTriangles(), hasQuad = _mesh->NbQuadrangles();
3753 if ( hasTria != hasQuad ) {
3754 toFixTria = hasTria;
3757 set<int> nbNodesSet;
3758 SMDS_ElemIteratorPtr fIt = smDS->GetElements();
3759 while ( fIt->more() && nbNodesSet.size() < 2 )
3760 nbNodesSet.insert( fIt->next()->NbCornerNodes() );
3761 toFixTria = ( *nbNodesSet.begin() == 3 );
3765 // ==================
3766 // Perform shrinking
3767 // ==================
3769 bool shrinked = true;
3770 int badNb, shriStep=0, smooStep=0;
3771 _SmoothNode::SmoothType smoothType
3772 = isConcaveFace ? _SmoothNode::ANGULAR : _SmoothNode::LAPLACIAN;
3776 // Move boundary nodes (actually just set new UV)
3777 // -----------------------------------------------
3778 dumpFunction(SMESH_Comment("moveBoundaryOnF")<<f2sd->first<<"_st"<<shriStep ); // debug
3780 for ( size_t i = 0; i < lEdges.size(); ++i )
3782 shrinked |= lEdges[i]->SetNewLength2d( surface,F,helper );
3786 // Move nodes on EDGE's
3787 // (XYZ is set as soon as a needed length reached in SetNewLength2d())
3788 set< _Shrinker1D* >::iterator shr = eShri1D.begin();
3789 for ( ; shr != eShri1D.end(); ++shr )
3790 (*shr)->Compute( /*set3D=*/false, helper );
3793 // -----------------
3794 int nbNoImpSteps = 0;
3797 while (( nbNoImpSteps < 5 && badNb > 0) && moved)
3799 dumpFunction(SMESH_Comment("shrinkFace")<<f2sd->first<<"_st"<<++smooStep); // debug
3801 int oldBadNb = badNb;
3804 for ( unsigned i = 0; i < nodesToSmooth.size(); ++i )
3806 moved |= nodesToSmooth[i].Smooth( badNb,surface,helper,refSign,
3807 smoothType, /*set3D=*/isConcaveFace);
3809 if ( badNb < oldBadNb )
3817 return error(SMESH_Comment("Can't shrink 2D mesh on face ") << f2sd->first );
3818 if ( shriStep > 200 )
3819 return error(SMESH_Comment("Infinite loop at shrinking 2D mesh on face ") << f2sd->first );
3821 // Fix narrow triangles by swapping diagonals
3822 // ---------------------------------------
3825 set<const SMDS_MeshNode*> usedNodes;
3826 fixBadFaces( F, helper, /*is2D=*/true, shriStep, & usedNodes); // swap diagonals
3828 // update working data
3829 set<const SMDS_MeshNode*>::iterator n;
3830 for ( size_t i = 0; i < nodesToSmooth.size() && !usedNodes.empty(); ++i )
3832 n = usedNodes.find( nodesToSmooth[ i ]._node );
3833 if ( n != usedNodes.end())
3835 getSimplices( nodesToSmooth[ i ]._node,
3836 nodesToSmooth[ i ]._simplices,
3838 /*sortSimplices=*/ smoothType == _SmoothNode::ANGULAR );
3839 usedNodes.erase( n );
3842 for ( size_t i = 0; i < lEdges.size() && !usedNodes.empty(); ++i )
3844 n = usedNodes.find( /*tgtNode=*/ lEdges[i]->_nodes.back() );
3845 if ( n != usedNodes.end())
3847 getSimplices( lEdges[i]->_nodes.back(),
3848 lEdges[i]->_simplices,
3850 usedNodes.erase( n );
3854 } // while ( shrinked )
3856 // No wrongly shaped faces remain; final smooth. Set node XYZ.
3857 bool isStructuredFixed = false;
3858 if ( SMESH_2D_Algo* algo = dynamic_cast<SMESH_2D_Algo*>( sm->GetAlgo() ))
3859 isStructuredFixed = algo->FixInternalNodes( *data._proxyMesh, F );
3860 if ( !isStructuredFixed )
3862 if ( isConcaveFace ) // fix narrow faces by swapping diagonals
3863 fixBadFaces( F, helper, /*is2D=*/false, ++shriStep );
3865 for ( int st = 3; st; --st )
3868 case 1: smoothType = _SmoothNode::LAPLACIAN; break;
3869 case 2: smoothType = _SmoothNode::LAPLACIAN; break;
3870 case 3: smoothType = _SmoothNode::ANGULAR; break;
3872 dumpFunction(SMESH_Comment("shrinkFace")<<f2sd->first<<"_st"<<++smooStep); // debug
3873 for ( unsigned i = 0; i < nodesToSmooth.size(); ++i )
3875 nodesToSmooth[i].Smooth( badNb,surface,helper,refSign,
3876 smoothType,/*set3D=*/st==1 );
3881 // Set an event listener to clear FACE sub-mesh together with SOLID sub-mesh
3882 VISCOUS_3D::ToClearSubWithMain( sm, data._solid );
3884 if ( !getMeshDS()->IsEmbeddedMode() )
3885 // Log node movement
3886 for ( unsigned i = 0; i < nodesToSmooth.size(); ++i )
3888 SMESH_TNodeXYZ p ( nodesToSmooth[i]._node );
3889 getMeshDS()->MoveNode( nodesToSmooth[i]._node, p.X(), p.Y(), p.Z() );
3892 } // loop on FACES to srink mesh on
3895 // Replace source nodes by target nodes in shrinked mesh edges
3897 map< int, _Shrinker1D >::iterator e2shr = e2shrMap.begin();
3898 for ( ; e2shr != e2shrMap.end(); ++e2shr )
3899 e2shr->second.SwapSrcTgtNodes( getMeshDS() );
3904 //================================================================================
3906 * \brief Computes 2d shrink direction and finds nodes limiting shrinking
3908 //================================================================================
3910 bool _ViscousBuilder::prepareEdgeToShrink( _LayerEdge& edge,
3911 const TopoDS_Face& F,
3912 SMESH_MesherHelper& helper,
3913 const SMESHDS_SubMesh* faceSubMesh)
3915 const SMDS_MeshNode* srcNode = edge._nodes[0];
3916 const SMDS_MeshNode* tgtNode = edge._nodes.back();
3920 if ( edge._sWOL.ShapeType() == TopAbs_FACE )
3922 gp_XY srcUV = helper.GetNodeUV( F, srcNode );
3923 gp_XY tgtUV = helper.GetNodeUV( F, tgtNode );
3924 gp_Vec2d uvDir( srcUV, tgtUV );
3925 double uvLen = uvDir.Magnitude();
3927 edge._normal.SetCoord( uvDir.X(),uvDir.Y(), 0);
3930 // // IMPORTANT to have src nodes NOT yet REPLACED by tgt nodes in shrinked faces
3931 // vector<const SMDS_MeshElement*> faces;
3932 // multimap< double, const SMDS_MeshNode* > proj2node;
3933 // SMDS_ElemIteratorPtr fIt = srcNode->GetInverseElementIterator(SMDSAbs_Face);
3934 // while ( fIt->more() )
3936 // const SMDS_MeshElement* f = fIt->next();
3937 // if ( faceSubMesh->Contains( f ))
3938 // faces.push_back( f );
3940 // for ( unsigned i = 0; i < faces.size(); ++i )
3942 // const int nbNodes = faces[i]->NbCornerNodes();
3943 // for ( int j = 0; j < nbNodes; ++j )
3945 // const SMDS_MeshNode* n = faces[i]->GetNode(j);
3946 // if ( n == srcNode ) continue;
3947 // if ( n->GetPosition()->GetTypeOfPosition() != SMDS_TOP_FACE &&
3948 // ( faces.size() > 1 || nbNodes > 3 ))
3950 // gp_Pnt2d uv = helper.GetNodeUV( F, n );
3951 // gp_Vec2d uvDirN( srcUV, uv );
3952 // double proj = uvDirN * uvDir;
3953 // proj2node.insert( make_pair( proj, n ));
3957 // multimap< double, const SMDS_MeshNode* >::iterator p2n = proj2node.begin(), p2nEnd;
3958 // const double minProj = p2n->first;
3959 // const double projThreshold = 1.1 * uvLen;
3960 // if ( minProj > projThreshold )
3962 // // tgtNode is located so that it does not make faces with wrong orientation
3965 edge._pos.resize(1);
3966 edge._pos[0].SetCoord( tgtUV.X(), tgtUV.Y(), 0 );
3968 // store most risky nodes in _simplices
3969 // p2nEnd = proj2node.lower_bound( projThreshold );
3970 // int nbSimpl = ( std::distance( p2n, p2nEnd ) + 1) / 2;
3971 // edge._simplices.resize( nbSimpl );
3972 // for ( int i = 0; i < nbSimpl; ++i )
3974 // edge._simplices[i]._nPrev = p2n->second;
3975 // if ( ++p2n != p2nEnd )
3976 // edge._simplices[i]._nNext = p2n->second;
3978 // set UV of source node to target node
3979 SMDS_FacePosition* pos = static_cast<SMDS_FacePosition*>( tgtNode->GetPosition() );
3980 pos->SetUParameter( srcUV.X() );
3981 pos->SetVParameter( srcUV.Y() );
3983 else // _sWOL is TopAbs_EDGE
3985 TopoDS_Edge E = TopoDS::Edge( edge._sWOL);
3986 SMESHDS_SubMesh* edgeSM = getMeshDS()->MeshElements( E );
3987 if ( !edgeSM || edgeSM->NbElements() == 0 )
3988 return error(SMESH_Comment("Not meshed EDGE ") << getMeshDS()->ShapeToIndex( E ));
3990 const SMDS_MeshNode* n2 = 0;
3991 SMDS_ElemIteratorPtr eIt = srcNode->GetInverseElementIterator(SMDSAbs_Edge);
3992 while ( eIt->more() && !n2 )
3994 const SMDS_MeshElement* e = eIt->next();
3995 if ( !edgeSM->Contains(e)) continue;
3996 n2 = e->GetNode( 0 );
3997 if ( n2 == srcNode ) n2 = e->GetNode( 1 );
4000 return error(SMESH_Comment("Wrongly meshed EDGE ") << getMeshDS()->ShapeToIndex( E ));
4002 double uSrc = helper.GetNodeU( E, srcNode, n2 );
4003 double uTgt = helper.GetNodeU( E, tgtNode, srcNode );
4004 double u2 = helper.GetNodeU( E, n2, srcNode );
4006 if ( fabs( uSrc-uTgt ) < 0.99 * fabs( uSrc-u2 ))
4008 // tgtNode is located so that it does not make faces with wrong orientation
4011 edge._pos.resize(1);
4012 edge._pos[0].SetCoord( U_TGT, uTgt );
4013 edge._pos[0].SetCoord( U_SRC, uSrc );
4014 edge._pos[0].SetCoord( LEN_TGT, fabs( uSrc-uTgt ));
4016 edge._simplices.resize( 1 );
4017 edge._simplices[0]._nPrev = n2;
4019 // set UV of source node to target node
4020 SMDS_EdgePosition* pos = static_cast<SMDS_EdgePosition*>( tgtNode->GetPosition() );
4021 pos->SetUParameter( uSrc );
4025 //================================================================================
4027 * \brief Compute positions (UV) to set to a node on edge moved during shrinking
4029 //================================================================================
4031 // Compute UV to follow during shrinking
4033 // const SMDS_MeshNode* srcNode = edge._nodes[0];
4034 // const SMDS_MeshNode* tgtNode = edge._nodes.back();
4036 // gp_XY srcUV = helper.GetNodeUV( F, srcNode );
4037 // gp_XY tgtUV = helper.GetNodeUV( F, tgtNode );
4038 // gp_Vec2d uvDir( srcUV, tgtUV );
4039 // double uvLen = uvDir.Magnitude();
4042 // // Select shrinking step such that not to make faces with wrong orientation.
4043 // // IMPORTANT to have src nodes NOT yet REPLACED by tgt nodes in shrinked faces
4044 // const double minStepSize = uvLen / 20;
4045 // double stepSize = uvLen;
4046 // SMDS_ElemIteratorPtr fIt = srcNode->GetInverseElementIterator(SMDSAbs_Face);
4047 // while ( fIt->more() )
4049 // const SMDS_MeshElement* f = fIt->next();
4050 // if ( !faceSubMesh->Contains( f )) continue;
4051 // const int nbNodes = f->NbCornerNodes();
4052 // for ( int i = 0; i < nbNodes; ++i )
4054 // const SMDS_MeshNode* n = f->GetNode(i);
4055 // if ( n->GetPosition()->GetTypeOfPosition() != SMDS_TOP_FACE || n == srcNode)
4057 // gp_XY uv = helper.GetNodeUV( F, n );
4058 // gp_Vec2d uvDirN( srcUV, uv );
4059 // double proj = uvDirN * uvDir;
4060 // if ( proj < stepSize && proj > minStepSize )
4066 // const int nbSteps = ceil( uvLen / stepSize );
4067 // gp_XYZ srcUV0( srcUV.X(), srcUV.Y(), 0 );
4068 // gp_XYZ tgtUV0( tgtUV.X(), tgtUV.Y(), 0 );
4069 // edge._pos.resize( nbSteps );
4070 // edge._pos[0] = tgtUV0;
4071 // for ( int i = 1; i < nbSteps; ++i )
4073 // double r = i / double( nbSteps );
4074 // edge._pos[i] = (1-r) * tgtUV0 + r * srcUV0;
4079 //================================================================================
4081 * \brief Try to fix triangles with high aspect ratio by swaping diagonals
4083 //================================================================================
4085 void _ViscousBuilder::fixBadFaces(const TopoDS_Face& F,
4086 SMESH_MesherHelper& helper,
4089 set<const SMDS_MeshNode*> * involvedNodes)
4091 SMESH::Controls::AspectRatio qualifier;
4092 SMESH::Controls::TSequenceOfXYZ points(3), points1(3), points2(3);
4093 const double maxAspectRatio = is2D ? 4. : 2;
4094 NodeCoordHelper xyz( F, helper, is2D );
4096 // find bad triangles
4098 vector< const SMDS_MeshElement* > badTrias;
4099 vector< double > badAspects;
4100 SMESHDS_SubMesh* sm = helper.GetMeshDS()->MeshElements( F );
4101 SMDS_ElemIteratorPtr fIt = sm->GetElements();
4102 while ( fIt->more() )
4104 const SMDS_MeshElement * f = fIt->next();
4105 if ( f->NbCornerNodes() != 3 ) continue;
4106 for ( int iP = 0; iP < 3; ++iP ) points(iP+1) = xyz( f->GetNode(iP));
4107 double aspect = qualifier.GetValue( points );
4108 if ( aspect > maxAspectRatio )
4110 badTrias.push_back( f );
4111 badAspects.push_back( aspect );
4116 dumpFunction(SMESH_Comment("beforeSwapDiagonals_F")<<helper.GetSubShapeID());
4117 SMDS_ElemIteratorPtr fIt = sm->GetElements();
4118 while ( fIt->more() )
4120 const SMDS_MeshElement * f = fIt->next();
4121 if ( f->NbCornerNodes() == 3 )
4122 dumpChangeNodes( f );
4126 if ( badTrias.empty() )
4129 // find couples of faces to swap diagonal
4131 typedef pair < const SMDS_MeshElement* , const SMDS_MeshElement* > T2Trias;
4132 vector< T2Trias > triaCouples;
4134 TIDSortedElemSet involvedFaces, emptySet;
4135 for ( size_t iTia = 0; iTia < badTrias.size(); ++iTia )
4138 double aspRatio [3];
4141 if ( !involvedFaces.insert( badTrias[iTia] ).second )
4143 for ( int iP = 0; iP < 3; ++iP )
4144 points(iP+1) = xyz( badTrias[iTia]->GetNode(iP));
4146 // find triangles adjacent to badTrias[iTia] with better aspect ratio after diag-swaping
4147 int bestCouple = -1;
4148 for ( int iSide = 0; iSide < 3; ++iSide )
4150 const SMDS_MeshNode* n1 = badTrias[iTia]->GetNode( iSide );
4151 const SMDS_MeshNode* n2 = badTrias[iTia]->GetNode(( iSide+1 ) % 3 );
4152 trias [iSide].first = badTrias[iTia];
4153 trias [iSide].second = SMESH_MeshAlgos::FindFaceInSet( n1, n2, emptySet, involvedFaces,
4155 if ( ! trias[iSide].second || trias[iSide].second->NbCornerNodes() != 3 )
4158 // aspect ratio of an adjacent tria
4159 for ( int iP = 0; iP < 3; ++iP )
4160 points2(iP+1) = xyz( trias[iSide].second->GetNode(iP));
4161 double aspectInit = qualifier.GetValue( points2 );
4163 // arrange nodes as after diag-swaping
4164 if ( helper.WrapIndex( i1+1, 3 ) == i2 )
4165 i3 = helper.WrapIndex( i1-1, 3 );
4167 i3 = helper.WrapIndex( i1+1, 3 );
4169 points1( 1+ iSide ) = points2( 1+ i3 );
4170 points2( 1+ i2 ) = points1( 1+ ( iSide+2 ) % 3 );
4172 // aspect ratio after diag-swaping
4173 aspRatio[ iSide ] = qualifier.GetValue( points1 ) + qualifier.GetValue( points2 );
4174 if ( aspRatio[ iSide ] > aspectInit + badAspects[ iTia ] )
4177 // prevent inversion of a triangle
4178 gp_Vec norm1 = gp_Vec( points1(1), points1(3) ) ^ gp_Vec( points1(1), points1(2) );
4179 gp_Vec norm2 = gp_Vec( points2(1), points2(3) ) ^ gp_Vec( points2(1), points2(2) );
4180 if ( norm1 * norm2 < 0. && norm1.Angle( norm2 ) > 70./180.*M_PI )
4183 if ( bestCouple < 0 || aspRatio[ bestCouple ] > aspRatio[ iSide ] )
4187 if ( bestCouple >= 0 )
4189 triaCouples.push_back( trias[bestCouple] );
4190 involvedFaces.insert ( trias[bestCouple].second );
4194 involvedFaces.erase( badTrias[iTia] );
4197 if ( triaCouples.empty() )
4202 SMESH_MeshEditor editor( helper.GetMesh() );
4203 dumpFunction(SMESH_Comment("beforeSwapDiagonals_F")<<helper.GetSubShapeID()<<"_"<<step);
4204 for ( size_t i = 0; i < triaCouples.size(); ++i )
4206 dumpChangeNodes( triaCouples[i].first );
4207 dumpChangeNodes( triaCouples[i].second );
4208 editor.InverseDiag( triaCouples[i].first, triaCouples[i].second );
4211 if ( involvedNodes )
4212 for ( size_t i = 0; i < triaCouples.size(); ++i )
4214 involvedNodes->insert( triaCouples[i].first->begin_nodes(),
4215 triaCouples[i].first->end_nodes() );
4216 involvedNodes->insert( triaCouples[i].second->begin_nodes(),
4217 triaCouples[i].second->end_nodes() );
4220 // just for debug dump resulting triangles
4221 dumpFunction(SMESH_Comment("swapDiagonals_F")<<helper.GetSubShapeID()<<"_"<<step);
4222 for ( size_t i = 0; i < triaCouples.size(); ++i )
4224 dumpChangeNodes( triaCouples[i].first );
4225 dumpChangeNodes( triaCouples[i].second );
4229 //================================================================================
4231 * \brief Move target node to it's final position on the FACE during shrinking
4233 //================================================================================
4235 bool _LayerEdge::SetNewLength2d( Handle(Geom_Surface)& surface,
4236 const TopoDS_Face& F,
4237 SMESH_MesherHelper& helper )
4240 return false; // already at the target position
4242 SMDS_MeshNode* tgtNode = const_cast< SMDS_MeshNode*& >( _nodes.back() );
4244 if ( _sWOL.ShapeType() == TopAbs_FACE )
4246 gp_XY curUV = helper.GetNodeUV( F, tgtNode );
4247 gp_Pnt2d tgtUV( _pos[0].X(), _pos[0].Y() );
4248 gp_Vec2d uvDir( _normal.X(), _normal.Y() );
4249 const double uvLen = tgtUV.Distance( curUV );
4250 const double kSafe = Max( 0.5, 1. - 0.1 * _simplices.size() );
4252 // Select shrinking step such that not to make faces with wrong orientation.
4253 double stepSize = uvLen;
4254 for ( size_t i = 0; i < _simplices.size(); ++i )
4256 // find intersection of 2 lines: curUV-tgtUV and that connecting simplex nodes
4257 gp_XY uvN1 = helper.GetNodeUV( F, _simplices[i]._nPrev );
4258 gp_XY uvN2 = helper.GetNodeUV( F, _simplices[i]._nNext );
4259 gp_XY dirN = uvN2 - uvN1;
4260 double det = uvDir.Crossed( dirN );
4261 if ( Abs( det ) < std::numeric_limits<double>::min() ) continue;
4262 gp_XY dirN2Cur = curUV - uvN1;
4263 double step = dirN.Crossed( dirN2Cur ) / det;
4265 stepSize = Min( step, stepSize );
4268 if ( uvLen - stepSize < _len / 200. )
4273 else if ( stepSize > 0 )
4275 newUV = curUV + uvDir.XY() * stepSize * kSafe;
4281 SMDS_FacePosition* pos = static_cast<SMDS_FacePosition*>( tgtNode->GetPosition() );
4282 pos->SetUParameter( newUV.X() );
4283 pos->SetVParameter( newUV.Y() );
4286 gp_Pnt p = surface->Value( newUV.X(), newUV.Y() );
4287 tgtNode->setXYZ( p.X(), p.Y(), p.Z() );
4288 dumpMove( tgtNode );
4291 else // _sWOL is TopAbs_EDGE
4293 TopoDS_Edge E = TopoDS::Edge( _sWOL );
4294 const SMDS_MeshNode* n2 = _simplices[0]._nPrev;
4295 SMDS_EdgePosition* tgtPos = static_cast<SMDS_EdgePosition*>( tgtNode->GetPosition() );
4297 const double u2 = helper.GetNodeU( E, n2, tgtNode );
4298 const double uSrc = _pos[0].Coord( U_SRC );
4299 const double lenTgt = _pos[0].Coord( LEN_TGT );
4301 double newU = _pos[0].Coord( U_TGT );
4302 if ( lenTgt < 0.99 * fabs( uSrc-u2 )) // n2 got out of src-tgt range
4308 newU = 0.1 * tgtPos->GetUParameter() + 0.9 * u2;
4310 tgtPos->SetUParameter( newU );
4312 gp_XY newUV = helper.GetNodeUV( F, tgtNode, _nodes[0]);
4313 gp_Pnt p = surface->Value( newUV.X(), newUV.Y() );
4314 tgtNode->setXYZ( p.X(), p.Y(), p.Z() );
4315 dumpMove( tgtNode );
4321 //================================================================================
4323 * \brief Perform smooth on the FACE
4324 * \retval bool - true if the node has been moved
4326 //================================================================================
4328 bool _SmoothNode::Smooth(int& badNb,
4329 Handle(Geom_Surface)& surface,
4330 SMESH_MesherHelper& helper,
4331 const double refSign,
4335 const TopoDS_Face& face = TopoDS::Face( helper.GetSubShape() );
4337 // get uv of surrounding nodes
4338 vector<gp_XY> uv( _simplices.size() );
4339 for ( size_t i = 0; i < _simplices.size(); ++i )
4340 uv[i] = helper.GetNodeUV( face, _simplices[i]._nPrev, _node );
4342 // compute new UV for the node
4344 if ( how == TFI && _simplices.size() == 4 )
4347 for ( size_t i = 0; i < _simplices.size(); ++i )
4348 if ( _simplices[i]._nOpp )
4349 corners[i] = helper.GetNodeUV( face, _simplices[i]._nOpp, _node );
4351 throw SALOME_Exception(LOCALIZED("TFI smoothing: _Simplex::_nOpp not set!"));
4353 newPos = helper.calcTFI ( 0.5, 0.5,
4354 corners[0], corners[1], corners[2], corners[3],
4355 uv[1], uv[2], uv[3], uv[0] );
4357 else if ( how == ANGULAR )
4359 newPos = computeAngularPos( uv, helper.GetNodeUV( face, _node ), refSign );
4361 else if ( how == CENTROIDAL && _simplices.size() > 3 )
4363 // average centers of diagonals wieghted with their reciprocal lengths
4364 if ( _simplices.size() == 4 )
4366 double w1 = 1. / ( uv[2]-uv[0] ).SquareModulus();
4367 double w2 = 1. / ( uv[3]-uv[1] ).SquareModulus();
4368 newPos = ( w1 * ( uv[2]+uv[0] ) + w2 * ( uv[3]+uv[1] )) / ( w1+w2 ) / 2;
4372 double sumWeight = 0;
4373 int nb = _simplices.size() == 4 ? 2 : _simplices.size();
4374 for ( int i = 0; i < nb; ++i )
4377 int iTo = i + _simplices.size() - 1;
4378 for ( int j = iFrom; j < iTo; ++j )
4380 int i2 = SMESH_MesherHelper::WrapIndex( j, _simplices.size() );
4381 double w = 1. / ( uv[i]-uv[i2] ).SquareModulus();
4383 newPos += w * ( uv[i]+uv[i2] );
4386 newPos /= 2 * sumWeight; // 2 is to get a middle between uv's
4392 for ( size_t i = 0; i < _simplices.size(); ++i )
4394 newPos /= _simplices.size();
4397 // count quality metrics (orientation) of triangles around the node
4399 gp_XY tgtUV = helper.GetNodeUV( face, _node );
4400 for ( unsigned i = 0; i < _simplices.size(); ++i )
4401 nbOkBefore += _simplices[i].IsForward( tgtUV, _node, face, helper, refSign );
4404 for ( unsigned i = 0; i < _simplices.size(); ++i )
4405 nbOkAfter += _simplices[i].IsForward( newPos, _node, face, helper, refSign );
4407 if ( nbOkAfter < nbOkBefore )
4409 badNb += _simplices.size() - nbOkBefore;
4413 SMDS_FacePosition* pos = static_cast<SMDS_FacePosition*>( _node->GetPosition() );
4414 pos->SetUParameter( newPos.X() );
4415 pos->SetVParameter( newPos.Y() );
4422 gp_Pnt p = surface->Value( newPos.X(), newPos.Y() );
4423 const_cast< SMDS_MeshNode* >( _node )->setXYZ( p.X(), p.Y(), p.Z() );
4427 badNb += _simplices.size() - nbOkAfter;
4428 return ( (tgtUV-newPos).SquareModulus() > 1e-10 );
4431 //================================================================================
4433 * \brief Computes new UV using angle based smoothing technic
4435 //================================================================================
4437 gp_XY _SmoothNode::computeAngularPos(vector<gp_XY>& uv,
4438 const gp_XY& uvToFix,
4439 const double refSign)
4441 uv.push_back( uv.front() );
4443 vector< gp_XY > edgeDir ( uv.size() );
4444 vector< double > edgeSize( uv.size() );
4445 for ( size_t i = 1; i < edgeDir.size(); ++i )
4447 edgeDir [i-1] = uv[i] - uv[i-1];
4448 edgeSize[i-1] = edgeDir[i-1].Modulus();
4449 if ( edgeSize[i-1] < numeric_limits<double>::min() )
4450 edgeDir[i-1].SetX( 100 );
4452 edgeDir[i-1] /= edgeSize[i-1] * refSign;
4454 edgeDir.back() = edgeDir.front();
4455 edgeSize.back() = edgeSize.front();
4460 for ( size_t i = 1; i < edgeDir.size(); ++i )
4462 if ( edgeDir[i-1].X() > 1. ) continue;
4464 while ( edgeDir[i].X() > 1. && ++i < edgeDir.size() );
4465 if ( i == edgeDir.size() ) break;
4467 gp_XY norm1( -edgeDir[i1].Y(), edgeDir[i1].X() );
4468 gp_XY norm2( -edgeDir[i].Y(), edgeDir[i].X() );
4469 gp_XY bisec = norm1 + norm2;
4470 double bisecSize = bisec.Modulus();
4471 if ( bisecSize < numeric_limits<double>::min() )
4473 bisec = -edgeDir[i1] + edgeDir[i];
4474 bisecSize = bisec.Modulus();
4478 gp_XY dirToN = uvToFix - p;
4479 double distToN = dirToN.Modulus();
4480 if ( bisec * dirToN < 0 )
4483 newPos += ( p + bisec * distToN ) * ( edgeSize[i1] + edgeSize[i] );
4485 sumSize += edgeSize[i1] + edgeSize[i];
4487 newPos /= /*nbEdges * */sumSize;
4491 //================================================================================
4493 * \brief Delete _SolidData
4495 //================================================================================
4497 _SolidData::~_SolidData()
4499 for ( unsigned i = 0; i < _edges.size(); ++i )
4501 if ( _edges[i] && _edges[i]->_2neibors )
4502 delete _edges[i]->_2neibors;
4507 //================================================================================
4509 * \brief Add a _LayerEdge inflated along the EDGE
4511 //================================================================================
4513 void _Shrinker1D::AddEdge( const _LayerEdge* e, SMESH_MesherHelper& helper )
4516 if ( _nodes.empty() )
4518 _edges[0] = _edges[1] = 0;
4522 if ( e == _edges[0] || e == _edges[1] )
4524 if ( e->_sWOL.IsNull() || e->_sWOL.ShapeType() != TopAbs_EDGE )
4525 throw SALOME_Exception(LOCALIZED("Wrong _LayerEdge is added"));
4526 if ( _edges[0] && _edges[0]->_sWOL != e->_sWOL )
4527 throw SALOME_Exception(LOCALIZED("Wrong _LayerEdge is added"));
4530 const TopoDS_Edge& E = TopoDS::Edge( e->_sWOL );
4532 BRep_Tool::Range( E, f,l );
4533 double u = helper.GetNodeU( E, e->_nodes[0], e->_nodes.back());
4534 _edges[ u < 0.5*(f+l) ? 0 : 1 ] = e;
4538 const SMDS_MeshNode* tgtNode0 = _edges[0] ? _edges[0]->_nodes.back() : 0;
4539 const SMDS_MeshNode* tgtNode1 = _edges[1] ? _edges[1]->_nodes.back() : 0;
4541 if ( _nodes.empty() )
4543 SMESHDS_SubMesh * eSubMesh = helper.GetMeshDS()->MeshElements( E );
4544 if ( !eSubMesh || eSubMesh->NbNodes() < 1 )
4546 TopLoc_Location loc;
4547 Handle(Geom_Curve) C = BRep_Tool::Curve(E, loc, f,l);
4548 GeomAdaptor_Curve aCurve(C, f,l);
4549 const double totLen = GCPnts_AbscissaPoint::Length(aCurve, f, l);
4551 int nbExpectNodes = eSubMesh->NbNodes();
4552 _initU .reserve( nbExpectNodes );
4553 _normPar.reserve( nbExpectNodes );
4554 _nodes .reserve( nbExpectNodes );
4555 SMDS_NodeIteratorPtr nIt = eSubMesh->GetNodes();
4556 while ( nIt->more() )
4558 const SMDS_MeshNode* node = nIt->next();
4559 if ( node->NbInverseElements(SMDSAbs_Edge) == 0 ||
4560 node == tgtNode0 || node == tgtNode1 )
4561 continue; // refinement nodes
4562 _nodes.push_back( node );
4563 _initU.push_back( helper.GetNodeU( E, node ));
4564 double len = GCPnts_AbscissaPoint::Length(aCurve, f, _initU.back());
4565 _normPar.push_back( len / totLen );
4570 // remove target node of the _LayerEdge from _nodes
4572 for ( unsigned i = 0; i < _nodes.size(); ++i )
4573 if ( !_nodes[i] || _nodes[i] == tgtNode0 || _nodes[i] == tgtNode1 )
4574 _nodes[i] = 0, nbFound++;
4575 if ( nbFound == _nodes.size() )
4580 //================================================================================
4582 * \brief Move nodes on EDGE from ends where _LayerEdge's are inflated
4584 //================================================================================
4586 void _Shrinker1D::Compute(bool set3D, SMESH_MesherHelper& helper)
4588 if ( _done || _nodes.empty())
4590 const _LayerEdge* e = _edges[0];
4591 if ( !e ) e = _edges[1];
4594 _done = (( !_edges[0] || _edges[0]->_pos.empty() ) &&
4595 ( !_edges[1] || _edges[1]->_pos.empty() ));
4597 const TopoDS_Edge& E = TopoDS::Edge( e->_sWOL );
4599 if ( set3D || _done )
4601 Handle(Geom_Curve) C = BRep_Tool::Curve(E, f,l);
4602 GeomAdaptor_Curve aCurve(C, f,l);
4605 f = helper.GetNodeU( E, _edges[0]->_nodes.back(), _nodes[0] );
4607 l = helper.GetNodeU( E, _edges[1]->_nodes.back(), _nodes.back() );
4608 double totLen = GCPnts_AbscissaPoint::Length( aCurve, f, l );
4610 for ( unsigned i = 0; i < _nodes.size(); ++i )
4612 if ( !_nodes[i] ) continue;
4613 double len = totLen * _normPar[i];
4614 GCPnts_AbscissaPoint discret( aCurve, len, f );
4615 if ( !discret.IsDone() )
4616 return throw SALOME_Exception(LOCALIZED("GCPnts_AbscissaPoint failed"));
4617 double u = discret.Parameter();
4618 SMDS_EdgePosition* pos = static_cast<SMDS_EdgePosition*>( _nodes[i]->GetPosition() );
4619 pos->SetUParameter( u );
4620 gp_Pnt p = C->Value( u );
4621 const_cast< SMDS_MeshNode*>( _nodes[i] )->setXYZ( p.X(), p.Y(), p.Z() );
4626 BRep_Tool::Range( E, f,l );
4628 f = helper.GetNodeU( E, _edges[0]->_nodes.back(), _nodes[0] );
4630 l = helper.GetNodeU( E, _edges[1]->_nodes.back(), _nodes.back() );
4632 for ( unsigned i = 0; i < _nodes.size(); ++i )
4634 if ( !_nodes[i] ) continue;
4635 double u = f * ( 1-_normPar[i] ) + l * _normPar[i];
4636 SMDS_EdgePosition* pos = static_cast<SMDS_EdgePosition*>( _nodes[i]->GetPosition() );
4637 pos->SetUParameter( u );
4642 //================================================================================
4644 * \brief Restore initial parameters of nodes on EDGE
4646 //================================================================================
4648 void _Shrinker1D::RestoreParams()
4651 for ( unsigned i = 0; i < _nodes.size(); ++i )
4653 if ( !_nodes[i] ) continue;
4654 SMDS_EdgePosition* pos = static_cast<SMDS_EdgePosition*>( _nodes[i]->GetPosition() );
4655 pos->SetUParameter( _initU[i] );
4660 //================================================================================
4662 * \brief Replace source nodes by target nodes in shrinked mesh edges
4664 //================================================================================
4666 void _Shrinker1D::SwapSrcTgtNodes( SMESHDS_Mesh* mesh )
4668 const SMDS_MeshNode* nodes[3];
4669 for ( int i = 0; i < 2; ++i )
4671 if ( !_edges[i] ) continue;
4673 SMESHDS_SubMesh * eSubMesh = mesh->MeshElements( _edges[i]->_sWOL );
4674 if ( !eSubMesh ) return;
4675 const SMDS_MeshNode* srcNode = _edges[i]->_nodes[0];
4676 const SMDS_MeshNode* tgtNode = _edges[i]->_nodes.back();
4677 SMDS_ElemIteratorPtr eIt = srcNode->GetInverseElementIterator(SMDSAbs_Edge);
4678 while ( eIt->more() )
4680 const SMDS_MeshElement* e = eIt->next();
4681 if ( !eSubMesh->Contains( e ))
4683 SMDS_ElemIteratorPtr nIt = e->nodesIterator();
4684 for ( int iN = 0; iN < e->NbNodes(); ++iN )
4686 const SMDS_MeshNode* n = static_cast<const SMDS_MeshNode*>( nIt->next() );
4687 nodes[iN] = ( n == srcNode ? tgtNode : n );
4689 mesh->ChangeElementNodes( e, nodes, e->NbNodes() );
4694 //================================================================================
4696 * \brief Creates 2D and 1D elements on boundaries of new prisms
4698 //================================================================================
4700 bool _ViscousBuilder::addBoundaryElements()
4702 SMESH_MesherHelper helper( *_mesh );
4704 for ( unsigned i = 0; i < _sdVec.size(); ++i )
4706 _SolidData& data = _sdVec[i];
4707 TopTools_IndexedMapOfShape geomEdges;
4708 TopExp::MapShapes( data._solid, TopAbs_EDGE, geomEdges );
4709 for ( int iE = 1; iE <= geomEdges.Extent(); ++iE )
4711 const TopoDS_Edge& E = TopoDS::Edge( geomEdges(iE));
4713 // Get _LayerEdge's based on E
4715 map< double, const SMDS_MeshNode* > u2nodes;
4716 if ( !SMESH_Algo::GetSortedNodesOnEdge( getMeshDS(), E, /*ignoreMedium=*/false, u2nodes))
4719 vector< _LayerEdge* > ledges; ledges.reserve( u2nodes.size() );
4720 TNode2Edge & n2eMap = data._n2eMap;
4721 map< double, const SMDS_MeshNode* >::iterator u2n = u2nodes.begin();
4723 //check if 2D elements are needed on E
4724 TNode2Edge::iterator n2e = n2eMap.find( u2n->second );
4725 if ( n2e == n2eMap.end() ) continue; // no layers on vertex
4726 ledges.push_back( n2e->second );
4728 if (( n2e = n2eMap.find( u2n->second )) == n2eMap.end() )
4729 continue; // no layers on E
4730 ledges.push_back( n2eMap[ u2n->second ]);
4732 const SMDS_MeshNode* tgtN0 = ledges[0]->_nodes.back();
4733 const SMDS_MeshNode* tgtN1 = ledges[1]->_nodes.back();
4734 int nbSharedPyram = 0;
4735 SMDS_ElemIteratorPtr vIt = tgtN0->GetInverseElementIterator(SMDSAbs_Volume);
4736 while ( vIt->more() )
4738 const SMDS_MeshElement* v = vIt->next();
4739 nbSharedPyram += int( v->GetNodeIndex( tgtN1 ) >= 0 );
4741 if ( nbSharedPyram > 1 )
4742 continue; // not free border of the pyramid
4744 if ( getMeshDS()->FindFace( ledges[0]->_nodes[0], ledges[0]->_nodes[1],
4745 ledges[1]->_nodes[0], ledges[1]->_nodes[1]))
4746 continue; // faces already created
4748 for ( ++u2n; u2n != u2nodes.end(); ++u2n )
4749 ledges.push_back( n2eMap[ u2n->second ]);
4751 // Find out orientation and type of face to create
4753 bool reverse = false, isOnFace;
4755 map< TGeomID, TopoDS_Shape >::iterator e2f =
4756 data._shrinkShape2Shape.find( getMeshDS()->ShapeToIndex( E ));
4758 if (( isOnFace = ( e2f != data._shrinkShape2Shape.end() )))
4760 F = e2f->second.Oriented( TopAbs_FORWARD );
4761 reverse = ( helper.GetSubShapeOri( F, E ) == TopAbs_REVERSED );
4762 if ( helper.GetSubShapeOri( data._solid, F ) == TopAbs_REVERSED )
4763 reverse = !reverse, F.Reverse();
4764 if ( helper.IsReversedSubMesh( TopoDS::Face(F) ))
4769 // find FACE with layers sharing E
4770 PShapeIteratorPtr fIt = helper.GetAncestors( E, *_mesh, TopAbs_FACE );
4771 while ( fIt->more() && F.IsNull() )
4773 const TopoDS_Shape* pF = fIt->next();
4774 if ( helper.IsSubShape( *pF, data._solid) &&
4775 !_ignoreShapeIds.count( e2f->first ))
4779 // Find the sub-mesh to add new faces
4780 SMESHDS_SubMesh* sm = 0;
4782 sm = getMeshDS()->MeshElements( F );
4784 sm = data._proxyMesh->getFaceSubM( TopoDS::Face(F), /*create=*/true );
4786 return error("error in addBoundaryElements()", data._index);
4789 const int dj1 = reverse ? 0 : 1;
4790 const int dj2 = reverse ? 1 : 0;
4791 for ( unsigned j = 1; j < ledges.size(); ++j )
4793 vector< const SMDS_MeshNode*>& nn1 = ledges[j-dj1]->_nodes;
4794 vector< const SMDS_MeshNode*>& nn2 = ledges[j-dj2]->_nodes;
4796 for ( size_t z = 1; z < nn1.size(); ++z )
4797 sm->AddElement( getMeshDS()->AddFace( nn1[z-1], nn2[z-1], nn2[z], nn1[z] ));
4799 for ( size_t z = 1; z < nn1.size(); ++z )
4800 sm->AddElement( new SMDS_FaceOfNodes( nn1[z-1], nn2[z-1], nn2[z], nn1[z]));
4804 for ( int isFirst = 0; isFirst < 2; ++isFirst )
4806 _LayerEdge* edge = isFirst ? ledges.front() : ledges.back();
4807 if ( !edge->_sWOL.IsNull() && edge->_sWOL.ShapeType() == TopAbs_EDGE )
4809 vector< const SMDS_MeshNode*>& nn = edge->_nodes;
4810 if ( nn[1]->GetInverseElementIterator( SMDSAbs_Edge )->more() )
4812 helper.SetSubShape( edge->_sWOL );
4813 helper.SetElementsOnShape( true );
4814 for ( size_t z = 1; z < nn.size(); ++z )
4815 helper.AddEdge( nn[z-1], nn[z] );