1 // Copyright (C) 2007-2015 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, or (at your option) any later version.
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_HypoFilter.hxx"
39 #include "SMESH_Mesh.hxx"
40 #include "SMESH_MeshAlgos.hxx"
41 #include "SMESH_MesherHelper.hxx"
42 #include "SMESH_ProxyMesh.hxx"
43 #include "SMESH_subMesh.hxx"
44 #include "SMESH_subMeshEventListener.hxx"
45 #include "StdMeshers_FaceSide.hxx"
47 #include <Adaptor3d_HSurface.hxx>
48 #include <BRepAdaptor_Curve2d.hxx>
49 #include <BRepAdaptor_Surface.hxx>
50 #include <BRepLProp_SLProps.hxx>
51 #include <BRep_Tool.hxx>
52 #include <Bnd_B2d.hxx>
53 #include <Bnd_B3d.hxx>
55 #include <GCPnts_AbscissaPoint.hxx>
56 #include <Geom2d_Circle.hxx>
57 #include <Geom2d_Line.hxx>
58 #include <Geom2d_TrimmedCurve.hxx>
59 #include <GeomAdaptor_Curve.hxx>
60 #include <GeomLib.hxx>
61 #include <Geom_Circle.hxx>
62 #include <Geom_Curve.hxx>
63 #include <Geom_Line.hxx>
64 #include <Geom_TrimmedCurve.hxx>
65 #include <Precision.hxx>
66 #include <Standard_ErrorHandler.hxx>
67 #include <Standard_Failure.hxx>
68 #include <TColStd_Array1OfReal.hxx>
70 #include <TopExp_Explorer.hxx>
71 #include <TopTools_IndexedMapOfShape.hxx>
72 #include <TopTools_ListOfShape.hxx>
73 #include <TopTools_MapOfShape.hxx>
75 #include <TopoDS_Edge.hxx>
76 #include <TopoDS_Face.hxx>
77 #include <TopoDS_Vertex.hxx>
79 #include <gp_Cone.hxx>
80 #include <gp_Sphere.hxx>
91 //#define __NOT_INVALIDATE_BAD_SMOOTH
96 //================================================================================
101 enum UIndex { U_TGT = 1, U_SRC, LEN_TGT };
103 const double theMinSmoothCosin = 0.1;
104 const double theSmoothThickToElemSizeRatio = 0.3;
106 // what part of thickness is allowed till intersection
107 // (defined by SALOME_TESTS/Grids/smesh/viscous_layers_00/A5)
108 const double theThickToIntersection = 1.5;
110 bool needSmoothing( double cosin, double tgtThick, double elemSize )
112 return cosin * tgtThick > theSmoothThickToElemSizeRatio * elemSize;
116 * \brief SMESH_ProxyMesh computed by _ViscousBuilder for a SOLID.
117 * It is stored in a SMESH_subMesh of the SOLID as SMESH_subMeshEventListenerData
119 struct _MeshOfSolid : public SMESH_ProxyMesh,
120 public SMESH_subMeshEventListenerData
122 bool _n2nMapComputed;
123 SMESH_ComputeErrorPtr _warning;
125 _MeshOfSolid( SMESH_Mesh* mesh)
126 :SMESH_subMeshEventListenerData( /*isDeletable=*/true),_n2nMapComputed(false)
128 SMESH_ProxyMesh::setMesh( *mesh );
131 // returns submesh for a geom face
132 SMESH_ProxyMesh::SubMesh* getFaceSubM(const TopoDS_Face& F, bool create=false)
134 TGeomID i = SMESH_ProxyMesh::shapeIndex(F);
135 return create ? SMESH_ProxyMesh::getProxySubMesh(i) : findProxySubMesh(i);
137 void setNode2Node(const SMDS_MeshNode* srcNode,
138 const SMDS_MeshNode* proxyNode,
139 const SMESH_ProxyMesh::SubMesh* subMesh)
141 SMESH_ProxyMesh::setNode2Node( srcNode,proxyNode,subMesh);
144 //--------------------------------------------------------------------------------
146 * \brief Listener of events of 3D sub-meshes computed with viscous layers.
147 * It is used to clear an inferior dim sub-meshes modified by viscous layers
149 class _ShrinkShapeListener : SMESH_subMeshEventListener
151 _ShrinkShapeListener()
152 : SMESH_subMeshEventListener(/*isDeletable=*/false,
153 "StdMeshers_ViscousLayers::_ShrinkShapeListener") {}
155 static SMESH_subMeshEventListener* Get() { static _ShrinkShapeListener l; return &l; }
156 virtual void ProcessEvent(const int event,
158 SMESH_subMesh* solidSM,
159 SMESH_subMeshEventListenerData* data,
160 const SMESH_Hypothesis* hyp)
162 if ( SMESH_subMesh::COMPUTE_EVENT == eventType && solidSM->IsEmpty() && data )
164 SMESH_subMeshEventListener::ProcessEvent(event,eventType,solidSM,data,hyp);
168 //--------------------------------------------------------------------------------
170 * \brief Listener of events of 3D sub-meshes computed with viscous layers.
171 * It is used to store data computed by _ViscousBuilder for a sub-mesh and to
172 * delete the data as soon as it has been used
174 class _ViscousListener : SMESH_subMeshEventListener
177 SMESH_subMeshEventListener(/*isDeletable=*/false,
178 "StdMeshers_ViscousLayers::_ViscousListener") {}
179 static SMESH_subMeshEventListener* Get() { static _ViscousListener l; return &l; }
181 virtual void ProcessEvent(const int event,
183 SMESH_subMesh* subMesh,
184 SMESH_subMeshEventListenerData* data,
185 const SMESH_Hypothesis* hyp)
187 if ( SMESH_subMesh::COMPUTE_EVENT == eventType &&
188 SMESH_subMesh::CHECK_COMPUTE_STATE != event)
190 // delete SMESH_ProxyMesh containing temporary faces
191 subMesh->DeleteEventListener( this );
194 // Finds or creates proxy mesh of the solid
195 static _MeshOfSolid* GetSolidMesh(SMESH_Mesh* mesh,
196 const TopoDS_Shape& solid,
199 if ( !mesh ) return 0;
200 SMESH_subMesh* sm = mesh->GetSubMesh(solid);
201 _MeshOfSolid* data = (_MeshOfSolid*) sm->GetEventListenerData( Get() );
202 if ( !data && toCreate )
204 data = new _MeshOfSolid(mesh);
205 data->mySubMeshes.push_back( sm ); // to find SOLID by _MeshOfSolid
206 sm->SetEventListener( Get(), data, sm );
210 // Removes proxy mesh of the solid
211 static void RemoveSolidMesh(SMESH_Mesh* mesh, const TopoDS_Shape& solid)
213 mesh->GetSubMesh(solid)->DeleteEventListener( _ViscousListener::Get() );
217 //================================================================================
219 * \brief sets a sub-mesh event listener to clear sub-meshes of sub-shapes of
220 * the main shape when sub-mesh of the main shape is cleared,
221 * for example to clear sub-meshes of FACEs when sub-mesh of a SOLID
224 //================================================================================
226 void ToClearSubWithMain( SMESH_subMesh* sub, const TopoDS_Shape& main)
228 SMESH_subMesh* mainSM = sub->GetFather()->GetSubMesh( main );
229 SMESH_subMeshEventListenerData* data =
230 mainSM->GetEventListenerData( _ShrinkShapeListener::Get());
233 if ( find( data->mySubMeshes.begin(), data->mySubMeshes.end(), sub ) ==
234 data->mySubMeshes.end())
235 data->mySubMeshes.push_back( sub );
239 data = SMESH_subMeshEventListenerData::MakeData( /*dependent=*/sub );
240 sub->SetEventListener( _ShrinkShapeListener::Get(), data, /*whereToListenTo=*/mainSM );
244 //--------------------------------------------------------------------------------
246 * \brief Simplex (triangle or tetrahedron) based on 1 (tria) or 2 (tet) nodes of
247 * _LayerEdge and 2 nodes of the mesh surface beening smoothed.
248 * The class is used to check validity of face or volumes around a smoothed node;
249 * it stores only 2 nodes as the other nodes are stored by _LayerEdge.
253 const SMDS_MeshNode *_nPrev, *_nNext; // nodes on a smoothed mesh surface
254 const SMDS_MeshNode *_nOpp; // in 2D case, a node opposite to a smoothed node in QUAD
255 _Simplex(const SMDS_MeshNode* nPrev=0,
256 const SMDS_MeshNode* nNext=0,
257 const SMDS_MeshNode* nOpp=0)
258 : _nPrev(nPrev), _nNext(nNext), _nOpp(nOpp) {}
259 bool IsForward(const SMDS_MeshNode* nSrc, const gp_XYZ* pntTgt, double& vol) const
261 const double M[3][3] =
262 {{ _nNext->X() - nSrc->X(), _nNext->Y() - nSrc->Y(), _nNext->Z() - nSrc->Z() },
263 { pntTgt->X() - nSrc->X(), pntTgt->Y() - nSrc->Y(), pntTgt->Z() - nSrc->Z() },
264 { _nPrev->X() - nSrc->X(), _nPrev->Y() - nSrc->Y(), _nPrev->Z() - nSrc->Z() }};
265 vol = ( + M[0][0]*M[1][1]*M[2][2]
266 + M[0][1]*M[1][2]*M[2][0]
267 + M[0][2]*M[1][0]*M[2][1]
268 - M[0][0]*M[1][2]*M[2][1]
269 - M[0][1]*M[1][0]*M[2][2]
270 - M[0][2]*M[1][1]*M[2][0]);
273 bool IsForward(const gp_XY& tgtUV,
274 const SMDS_MeshNode* smoothedNode,
275 const TopoDS_Face& face,
276 SMESH_MesherHelper& helper,
277 const double refSign) const
279 gp_XY prevUV = helper.GetNodeUV( face, _nPrev, smoothedNode );
280 gp_XY nextUV = helper.GetNodeUV( face, _nNext, smoothedNode );
281 gp_Vec2d v1( tgtUV, prevUV ), v2( tgtUV, nextUV );
283 return d*refSign > 1e-100;
285 bool IsNeighbour(const _Simplex& other) const
287 return _nPrev == other._nNext || _nNext == other._nPrev;
289 static void GetSimplices( const SMDS_MeshNode* node,
290 vector<_Simplex>& simplices,
291 const set<TGeomID>& ingnoreShapes,
292 const _SolidData* dataToCheckOri = 0,
293 const bool toSort = false);
294 static void SortSimplices(vector<_Simplex>& simplices);
296 //--------------------------------------------------------------------------------
298 * Structure used to take into account surface curvature while smoothing
303 double _k; // factor to correct node smoothed position
304 double _h2lenRatio; // avgNormProj / (2*avgDist)
306 static _Curvature* New( double avgNormProj, double avgDist )
309 if ( fabs( avgNormProj / avgDist ) > 1./200 )
312 c->_r = avgDist * avgDist / avgNormProj;
313 c->_k = avgDist * avgDist / c->_r / c->_r;
314 //c->_k = avgNormProj / c->_r;
315 c->_k *= ( c->_r < 0 ? 1/1.1 : 1.1 ); // not to be too restrictive
316 c->_h2lenRatio = avgNormProj / ( avgDist + avgDist );
320 double lenDelta(double len) const { return _k * ( _r + len ); }
321 double lenDeltaByDist(double dist) const { return dist * _h2lenRatio; }
323 //--------------------------------------------------------------------------------
327 struct _EdgesOnShape;
328 typedef map< const SMDS_MeshNode*, _LayerEdge*, TIDCompare > TNode2Edge;
330 //--------------------------------------------------------------------------------
332 * \brief Edge normal to surface, connecting a node on solid surface (_nodes[0])
333 * and a node of the most internal layer (_nodes.back())
337 typedef gp_XYZ (_LayerEdge::*PSmooFun)();
339 vector< const SMDS_MeshNode*> _nodes;
341 gp_XYZ _normal; // to solid surface
342 vector<gp_XYZ> _pos; // points computed during inflation
343 double _len; // length achived with the last inflation step
344 double _cosin; // of angle (_normal ^ surface)
345 double _lenFactor; // to compute _len taking _cosin into account
347 // face or edge w/o layer along or near which _LayerEdge is inflated
348 //TopoDS_Shape* _sWOL;
349 // simplices connected to the source node (_nodes[0]);
350 // used for smoothing and quality check of _LayerEdge's based on the FACE
351 vector<_Simplex> _simplices;
352 PSmooFun _smooFunction; // smoothing function
353 // data for smoothing of _LayerEdge's based on the EDGE
354 _2NearEdges* _2neibors;
356 _Curvature* _curvature;
357 // TODO:: detele _Curvature, _plnNorm
359 void SetNewLength( double len, _EdgesOnShape& eos, SMESH_MesherHelper& helper );
360 bool SetNewLength2d( Handle(Geom_Surface)& surface,
361 const TopoDS_Face& F,
363 SMESH_MesherHelper& helper );
364 void SetDataByNeighbors( const SMDS_MeshNode* n1,
365 const SMDS_MeshNode* n2,
366 const _EdgesOnShape& eos,
367 SMESH_MesherHelper& helper);
368 void InvalidateStep( int curStep, const _EdgesOnShape& eos, bool restoreLength=false );
369 void ChooseSmooFunction(const set< TGeomID >& concaveVertices,
370 const TNode2Edge& n2eMap);
371 int Smooth(const int step, const bool isConcaveFace, const bool findBest);
372 bool SmoothOnEdge(Handle(Geom_Surface)& surface,
373 const TopoDS_Face& F,
374 SMESH_MesherHelper& helper);
375 bool FindIntersection( SMESH_ElementSearcher& searcher,
377 const double& epsilon,
379 const SMDS_MeshElement** face = 0);
380 bool SegTriaInter( const gp_Ax1& lastSegment,
381 const SMDS_MeshNode* n0,
382 const SMDS_MeshNode* n1,
383 const SMDS_MeshNode* n2,
385 const double& epsilon) const;
386 gp_Ax1 LastSegment(double& segLen, _EdgesOnShape& eos) const;
387 gp_XY LastUV( const TopoDS_Face& F, _EdgesOnShape& eos ) const;
388 bool IsOnEdge() const { return _2neibors; }
389 gp_XYZ Copy( _LayerEdge& other, _EdgesOnShape& eos, SMESH_MesherHelper& helper );
390 void SetCosin( double cosin );
391 int NbSteps() const { return _pos.size() - 1; } // nb inlation steps
393 gp_XYZ smoothLaplacian();
394 gp_XYZ smoothAngular();
395 gp_XYZ smoothLengthWeighted();
396 gp_XYZ smoothCentroidal();
397 gp_XYZ smoothNefPolygon();
399 enum { FUN_LAPLACIAN, FUN_LENWEIGHTED, FUN_CENTROIDAL, FUN_NEFPOLY, FUN_ANGULAR, FUN_NB };
400 static const int theNbSmooFuns = FUN_NB;
401 static PSmooFun _funs[theNbSmooFuns];
402 static const char* _funNames[theNbSmooFuns+1];
403 int smooFunID( PSmooFun fun=0) const;
405 _LayerEdge::PSmooFun _LayerEdge::_funs[theNbSmooFuns] = { &_LayerEdge::smoothLaplacian,
406 &_LayerEdge::smoothLengthWeighted,
407 &_LayerEdge::smoothCentroidal,
408 &_LayerEdge::smoothNefPolygon,
409 &_LayerEdge::smoothAngular };
410 const char* _LayerEdge::_funNames[theNbSmooFuns+1] = { "Laplacian",
418 bool operator () (const _LayerEdge* e1, const _LayerEdge* e2) const
420 const bool cmpNodes = ( e1 && e2 && e1->_nodes.size() && e2->_nodes.size() );
421 return cmpNodes ? ( e1->_nodes[0]->GetID() < e2->_nodes[0]->GetID()) : ( e1 < e2 );
424 //--------------------------------------------------------------------------------
426 * A 2D half plane used by _LayerEdge::smoothNefPolygon()
430 gp_XY _pos, _dir, _inNorm;
431 bool IsOut( const gp_XY p, const double tol ) const
433 return _inNorm * ( p - _pos ) < -tol;
435 bool FindInterestion( const _halfPlane& hp, gp_XY & intPnt )
437 const double eps = 1e-10;
438 double D = _dir.Crossed( hp._dir );
439 if ( fabs(D) < std::numeric_limits<double>::min())
441 gp_XY vec21 = _pos - hp._pos;
442 double u = hp._dir.Crossed( vec21 ) / D;
443 intPnt = _pos + _dir * u;
447 //--------------------------------------------------------------------------------
449 * Structure used to smooth a _LayerEdge based on an EDGE.
453 double _wgt [2]; // weights of _nodes
454 _LayerEdge* _edges[2];
456 // normal to plane passing through _LayerEdge._normal and tangent of EDGE
459 _2NearEdges() { _edges[0]=_edges[1]=0; _plnNorm = 0; }
460 const SMDS_MeshNode* tgtNode(bool is2nd) {
461 return _edges[is2nd] ? _edges[is2nd]->_nodes.back() : 0;
463 const SMDS_MeshNode* srcNode(bool is2nd) {
464 return _edges[is2nd] ? _edges[is2nd]->_nodes[0] : 0;
467 std::swap( _wgt [0], _wgt [1] );
468 std::swap( _edges[0], _edges[1] );
473 //--------------------------------------------------------------------------------
475 * \brief Layers parameters got by averaging several hypotheses
479 AverageHyp( const StdMeshers_ViscousLayers* hyp = 0 )
480 :_nbLayers(0), _nbHyps(0), _thickness(0), _stretchFactor(0), _method(0)
484 void Add( const StdMeshers_ViscousLayers* hyp )
489 _nbLayers = hyp->GetNumberLayers();
490 //_thickness += hyp->GetTotalThickness();
491 _thickness = Max( _thickness, hyp->GetTotalThickness() );
492 _stretchFactor += hyp->GetStretchFactor();
493 _method = hyp->GetMethod();
496 double GetTotalThickness() const { return _thickness; /*_nbHyps ? _thickness / _nbHyps : 0;*/ }
497 double GetStretchFactor() const { return _nbHyps ? _stretchFactor / _nbHyps : 0; }
498 int GetNumberLayers() const { return _nbLayers; }
499 int GetMethod() const { return _method; }
501 bool UseSurfaceNormal() const
502 { return _method == StdMeshers_ViscousLayers::SURF_OFFSET_SMOOTH; }
503 bool ToSmooth() const
504 { return _method == StdMeshers_ViscousLayers::SURF_OFFSET_SMOOTH; }
505 bool IsOffsetMethod() const
506 { return _method == StdMeshers_ViscousLayers::FACE_OFFSET; }
509 int _nbLayers, _nbHyps, _method;
510 double _thickness, _stretchFactor;
513 //--------------------------------------------------------------------------------
515 * \brief _LayerEdge's on a shape and other shape data
519 vector< _LayerEdge* > _edges;
523 SMESH_subMesh * _subMesh;
524 // face or edge w/o layer along or near which _edges are inflated
526 // averaged StdMeshers_ViscousLayers parameters
530 vector< gp_XYZ > _faceNormals; // if _shape is FACE
531 vector< _EdgesOnShape* > _faceEOS; // to get _faceNormals of adjacent FACEs
533 TopAbs_ShapeEnum ShapeType() const
534 { return _shape.IsNull() ? TopAbs_SHAPE : _shape.ShapeType(); }
535 TopAbs_ShapeEnum SWOLType() const
536 { return _sWOL.IsNull() ? TopAbs_SHAPE : _sWOL.ShapeType(); }
537 bool GetNormal( const SMDS_MeshElement* face, gp_Vec& norm );
540 //--------------------------------------------------------------------------------
542 * \brief Convex FACE whose radius of curvature is less than the thickness of
543 * layers. It is used to detect distortion of prisms based on a convex
544 * FACE and to update normals to enable further increasing the thickness
550 // edges whose _simplices are used to detect prism destorsion
551 vector< _LayerEdge* > _simplexTestEdges;
553 // map a sub-shape to _SolidData::_edgesOnShape
554 map< TGeomID, _EdgesOnShape* > _subIdToEOS;
558 bool GetCenterOfCurvature( _LayerEdge* ledge,
559 BRepLProp_SLProps& surfProp,
560 SMESH_MesherHelper& helper,
561 gp_Pnt & center ) const;
562 bool CheckPrisms() const;
565 //--------------------------------------------------------------------------------
567 * \brief Data of a SOLID
571 typedef const StdMeshers_ViscousLayers* THyp;
573 TGeomID _index; // SOLID id
574 _MeshOfSolid* _proxyMesh;
576 list< TopoDS_Shape > _hypShapes;
577 map< TGeomID, THyp > _face2hyp; // filled if _hyps.size() > 1
578 set< TGeomID > _reversedFaceIds;
579 set< TGeomID > _ignoreFaceIds; // WOL FACEs and FACEs of other SOLIDs
581 double _stepSize, _stepSizeCoeff, _geomSize;
582 const SMDS_MeshNode* _stepSizeNodes[2];
584 TNode2Edge _n2eMap; // nodes and _LayerEdge's based on them
586 // map to find _n2eMap of another _SolidData by a shrink shape shared by two _SolidData's
587 map< TGeomID, TNode2Edge* > _s2neMap;
588 // _LayerEdge's with underlying shapes
589 vector< _EdgesOnShape > _edgesOnShape;
591 // key: an id of shape (EDGE or VERTEX) shared by a FACE with
592 // layers and a FACE w/o layers
593 // value: the shape (FACE or EDGE) to shrink mesh on.
594 // _LayerEdge's basing on nodes on key shape are inflated along the value shape
595 map< TGeomID, TopoDS_Shape > _shrinkShape2Shape;
597 // Convex FACEs whose radius of curvature is less than the thickness of layers
598 map< TGeomID, _ConvexFace > _convexFaces;
600 // shapes (EDGEs and VERTEXes) srink from which is forbidden due to collisions with
601 // the adjacent SOLID
602 set< TGeomID > _noShrinkShapes;
604 int _nbShapesToSmooth;
606 // <EDGE to smooth on> to <it's curve> -- for analytic smooth
607 map< TGeomID,Handle(Geom_Curve)> _edge2curve;
609 set< TGeomID > _concaveFaces;
611 double _maxThickness; // of all _hyps
612 double _minThickness; // of all _hyps
614 double _epsilon; // precision for SegTriaInter()
616 _SolidData(const TopoDS_Shape& s=TopoDS_Shape(),
618 :_solid(s), _proxyMesh(m) {}
621 Handle(Geom_Curve) CurveForSmooth( const TopoDS_Edge& E,
623 SMESH_MesherHelper& helper);
625 void SortOnEdge( const TopoDS_Edge& E,
626 vector< _LayerEdge* >& edges,
627 SMESH_MesherHelper& helper);
629 void Sort2NeiborsOnEdge( vector< _LayerEdge* >& edges );
631 _ConvexFace* GetConvexFace( const TGeomID faceID )
633 map< TGeomID, _ConvexFace >::iterator id2face = _convexFaces.find( faceID );
634 return id2face == _convexFaces.end() ? 0 : & id2face->second;
636 _EdgesOnShape* GetShapeEdges(const TGeomID shapeID );
637 _EdgesOnShape* GetShapeEdges(const TopoDS_Shape& shape );
638 _EdgesOnShape* GetShapeEdges(const _LayerEdge* edge )
639 { return GetShapeEdges( edge->_nodes[0]->getshapeId() ); }
641 void AddShapesToSmooth( const set< _EdgesOnShape* >& shape );
643 void PrepareEdgesToSmoothOnFace( _EdgesOnShape* eof, bool substituteSrcNodes );
645 //--------------------------------------------------------------------------------
647 * \brief Container of centers of curvature at nodes on an EDGE bounding _ConvexFace
649 struct _CentralCurveOnEdge
652 vector< gp_Pnt > _curvaCenters;
653 vector< _LayerEdge* > _ledges;
654 vector< gp_XYZ > _normals; // new normal for each of _ledges
655 vector< double > _segLength2;
658 TopoDS_Face _adjFace;
659 bool _adjFaceToSmooth;
661 void Append( const gp_Pnt& center, _LayerEdge* ledge )
663 if ( _curvaCenters.size() > 0 )
664 _segLength2.push_back( center.SquareDistance( _curvaCenters.back() ));
665 _curvaCenters.push_back( center );
666 _ledges.push_back( ledge );
667 _normals.push_back( ledge->_normal );
669 bool FindNewNormal( const gp_Pnt& center, gp_XYZ& newNormal );
670 void SetShapes( const TopoDS_Edge& edge,
671 const _ConvexFace& convFace,
673 SMESH_MesherHelper& helper);
675 //--------------------------------------------------------------------------------
677 * \brief Data of node on a shrinked FACE
681 const SMDS_MeshNode* _node;
682 vector<_Simplex> _simplices; // for quality check
684 enum SmoothType { LAPLACIAN, CENTROIDAL, ANGULAR, TFI };
686 bool Smooth(int& badNb,
687 Handle(Geom_Surface)& surface,
688 SMESH_MesherHelper& helper,
689 const double refSign,
693 gp_XY computeAngularPos(vector<gp_XY>& uv,
694 const gp_XY& uvToFix,
695 const double refSign );
697 //--------------------------------------------------------------------------------
699 * \brief Builder of viscous layers
701 class _ViscousBuilder
706 SMESH_ComputeErrorPtr Compute(SMESH_Mesh& mesh,
707 const TopoDS_Shape& shape);
708 // check validity of hypotheses
709 SMESH_ComputeErrorPtr CheckHypotheses( SMESH_Mesh& mesh,
710 const TopoDS_Shape& shape );
712 // restore event listeners used to clear an inferior dim sub-mesh modified by viscous layers
713 void RestoreListeners();
715 // computes SMESH_ProxyMesh::SubMesh::_n2n;
716 bool MakeN2NMap( _MeshOfSolid* pm );
720 bool findSolidsWithLayers();
721 bool findFacesWithLayers(const bool onlyWith=false);
722 void getIgnoreFaces(const TopoDS_Shape& solid,
723 const StdMeshers_ViscousLayers* hyp,
724 const TopoDS_Shape& hypShape,
725 set<TGeomID>& ignoreFaces);
726 bool makeLayer(_SolidData& data);
727 void setShapeData( _EdgesOnShape& eos, SMESH_subMesh* sm, _SolidData& data );
728 bool setEdgeData(_LayerEdge& edge, _EdgesOnShape& eos, const set<TGeomID>& subIds,
729 SMESH_MesherHelper& helper, _SolidData& data);
730 gp_XYZ getFaceNormal(const SMDS_MeshNode* n,
731 const TopoDS_Face& face,
732 SMESH_MesherHelper& helper,
734 bool shiftInside=false);
735 bool getFaceNormalAtSingularity(const gp_XY& uv,
736 const TopoDS_Face& face,
737 SMESH_MesherHelper& helper,
739 gp_XYZ getWeigthedNormal( const SMDS_MeshNode* n,
740 std::pair< TopoDS_Face, gp_XYZ > fId2Normal[],
742 bool findNeiborsOnEdge(const _LayerEdge* edge,
743 const SMDS_MeshNode*& n1,
744 const SMDS_MeshNode*& n2,
747 void findSimplexTestEdges( _SolidData& data,
748 vector< vector<_LayerEdge*> >& edgesByGeom);
749 void computeGeomSize( _SolidData& data );
750 bool findShapesToSmooth( _SolidData& data);
751 void limitStepSizeByCurvature( _SolidData& data );
752 void limitStepSize( _SolidData& data,
753 const SMDS_MeshElement* face,
754 const _LayerEdge* maxCosinEdge );
755 void limitStepSize( _SolidData& data, const double minSize);
756 bool inflate(_SolidData& data);
757 bool smoothAndCheck(_SolidData& data, const int nbSteps, double & distToIntersection);
758 bool smoothAnalyticEdge( _SolidData& data,
760 Handle(Geom_Surface)& surface,
761 const TopoDS_Face& F,
762 SMESH_MesherHelper& helper);
763 bool updateNormals( _SolidData& data, SMESH_MesherHelper& helper, int stepNb );
764 bool updateNormalsOfConvexFaces( _SolidData& data,
765 SMESH_MesherHelper& helper,
767 bool refine(_SolidData& data);
769 bool prepareEdgeToShrink( _LayerEdge& edge, _EdgesOnShape& eos,
770 SMESH_MesherHelper& helper,
771 const SMESHDS_SubMesh* faceSubMesh );
772 void restoreNoShrink( _LayerEdge& edge ) const;
773 void fixBadFaces(const TopoDS_Face& F,
774 SMESH_MesherHelper& helper,
777 set<const SMDS_MeshNode*> * involvedNodes=NULL);
778 bool addBoundaryElements();
780 bool error( const string& text, int solidID=-1 );
781 SMESHDS_Mesh* getMeshDS() const { return _mesh->GetMeshDS(); }
784 void makeGroupOfLE();
787 SMESH_ComputeErrorPtr _error;
789 vector< _SolidData > _sdVec;
792 //--------------------------------------------------------------------------------
794 * \brief Shrinker of nodes on the EDGE
798 TopoDS_Edge _geomEdge;
799 vector<double> _initU;
800 vector<double> _normPar;
801 vector<const SMDS_MeshNode*> _nodes;
802 const _LayerEdge* _edges[2];
805 void AddEdge( const _LayerEdge* e, _EdgesOnShape& eos, SMESH_MesherHelper& helper );
806 void Compute(bool set3D, SMESH_MesherHelper& helper);
807 void RestoreParams();
808 void SwapSrcTgtNodes(SMESHDS_Mesh* mesh);
810 //--------------------------------------------------------------------------------
812 * \brief Class of temporary mesh face.
813 * We can't use SMDS_FaceOfNodes since it's impossible to set it's ID which is
814 * needed because SMESH_ElementSearcher internaly uses set of elements sorted by ID
816 struct _TmpMeshFace : public SMDS_MeshElement
818 vector<const SMDS_MeshNode* > _nn;
819 _TmpMeshFace( const vector<const SMDS_MeshNode*>& nodes, int id, int faceID=-1):
820 SMDS_MeshElement(id), _nn(nodes) { setShapeId(faceID); }
821 virtual const SMDS_MeshNode* GetNode(const int ind) const { return _nn[ind]; }
822 virtual SMDSAbs_ElementType GetType() const { return SMDSAbs_Face; }
823 virtual vtkIdType GetVtkType() const { return -1; }
824 virtual SMDSAbs_EntityType GetEntityType() const { return SMDSEntity_Last; }
825 virtual SMDSAbs_GeometryType GetGeomType() const
826 { return _nn.size() == 3 ? SMDSGeom_TRIANGLE : SMDSGeom_QUADRANGLE; }
827 virtual SMDS_ElemIteratorPtr elementsIterator(SMDSAbs_ElementType) const
828 { return SMDS_ElemIteratorPtr( new SMDS_NodeVectorElemIterator( _nn.begin(), _nn.end()));}
830 //--------------------------------------------------------------------------------
832 * \brief Class of temporary mesh face storing _LayerEdge it's based on
834 struct _TmpMeshFaceOnEdge : public _TmpMeshFace
836 _LayerEdge *_le1, *_le2;
837 _TmpMeshFaceOnEdge( _LayerEdge* le1, _LayerEdge* le2, int ID ):
838 _TmpMeshFace( vector<const SMDS_MeshNode*>(4), ID ), _le1(le1), _le2(le2)
840 _nn[0]=_le1->_nodes[0];
841 _nn[1]=_le1->_nodes.back();
842 _nn[2]=_le2->_nodes.back();
843 _nn[3]=_le2->_nodes[0];
846 //--------------------------------------------------------------------------------
848 * \brief Retriever of node coordinates either directly or from a surface by node UV.
849 * \warning Location of a surface is ignored
851 struct _NodeCoordHelper
853 SMESH_MesherHelper& _helper;
854 const TopoDS_Face& _face;
855 Handle(Geom_Surface) _surface;
856 gp_XYZ (_NodeCoordHelper::* _fun)(const SMDS_MeshNode* n) const;
858 _NodeCoordHelper(const TopoDS_Face& F, SMESH_MesherHelper& helper, bool is2D)
859 : _helper( helper ), _face( F )
864 _surface = BRep_Tool::Surface( _face, loc );
866 if ( _surface.IsNull() )
867 _fun = & _NodeCoordHelper::direct;
869 _fun = & _NodeCoordHelper::byUV;
871 gp_XYZ operator()(const SMDS_MeshNode* n) const { return (this->*_fun)( n ); }
874 gp_XYZ direct(const SMDS_MeshNode* n) const
876 return SMESH_TNodeXYZ( n );
878 gp_XYZ byUV (const SMDS_MeshNode* n) const
880 gp_XY uv = _helper.GetNodeUV( _face, n );
881 return _surface->Value( uv.X(), uv.Y() ).XYZ();
885 } // namespace VISCOUS_3D
889 //================================================================================
890 // StdMeshers_ViscousLayers hypothesis
892 StdMeshers_ViscousLayers::StdMeshers_ViscousLayers(int hypId, int studyId, SMESH_Gen* gen)
893 :SMESH_Hypothesis(hypId, studyId, gen),
894 _isToIgnoreShapes(1), _nbLayers(1), _thickness(1), _stretchFactor(1),
895 _method( SURF_OFFSET_SMOOTH )
897 _name = StdMeshers_ViscousLayers::GetHypType();
898 _param_algo_dim = -3; // auxiliary hyp used by 3D algos
899 } // --------------------------------------------------------------------------------
900 void StdMeshers_ViscousLayers::SetBndShapes(const std::vector<int>& faceIds, bool toIgnore)
902 if ( faceIds != _shapeIds )
903 _shapeIds = faceIds, NotifySubMeshesHypothesisModification();
904 if ( _isToIgnoreShapes != toIgnore )
905 _isToIgnoreShapes = toIgnore, NotifySubMeshesHypothesisModification();
906 } // --------------------------------------------------------------------------------
907 void StdMeshers_ViscousLayers::SetTotalThickness(double thickness)
909 if ( thickness != _thickness )
910 _thickness = thickness, NotifySubMeshesHypothesisModification();
911 } // --------------------------------------------------------------------------------
912 void StdMeshers_ViscousLayers::SetNumberLayers(int nb)
914 if ( _nbLayers != nb )
915 _nbLayers = nb, NotifySubMeshesHypothesisModification();
916 } // --------------------------------------------------------------------------------
917 void StdMeshers_ViscousLayers::SetStretchFactor(double factor)
919 if ( _stretchFactor != factor )
920 _stretchFactor = factor, NotifySubMeshesHypothesisModification();
921 } // --------------------------------------------------------------------------------
922 void StdMeshers_ViscousLayers::SetMethod( ExtrusionMethod method )
924 if ( _method != method )
925 _method = method, NotifySubMeshesHypothesisModification();
926 } // --------------------------------------------------------------------------------
928 StdMeshers_ViscousLayers::Compute(SMESH_Mesh& theMesh,
929 const TopoDS_Shape& theShape,
930 const bool toMakeN2NMap) const
932 using namespace VISCOUS_3D;
933 _ViscousBuilder bulder;
934 SMESH_ComputeErrorPtr err = bulder.Compute( theMesh, theShape );
935 if ( err && !err->IsOK() )
936 return SMESH_ProxyMesh::Ptr();
938 vector<SMESH_ProxyMesh::Ptr> components;
939 TopExp_Explorer exp( theShape, TopAbs_SOLID );
940 for ( ; exp.More(); exp.Next() )
942 if ( _MeshOfSolid* pm =
943 _ViscousListener::GetSolidMesh( &theMesh, exp.Current(), /*toCreate=*/false))
945 if ( toMakeN2NMap && !pm->_n2nMapComputed )
946 if ( !bulder.MakeN2NMap( pm ))
947 return SMESH_ProxyMesh::Ptr();
948 components.push_back( SMESH_ProxyMesh::Ptr( pm ));
949 pm->myIsDeletable = false; // it will de deleted by boost::shared_ptr
951 if ( pm->_warning && !pm->_warning->IsOK() )
953 SMESH_subMesh* sm = theMesh.GetSubMesh( exp.Current() );
954 SMESH_ComputeErrorPtr& smError = sm->GetComputeError();
955 if ( !smError || smError->IsOK() )
956 smError = pm->_warning;
959 _ViscousListener::RemoveSolidMesh ( &theMesh, exp.Current() );
961 switch ( components.size() )
965 case 1: return components[0];
967 default: return SMESH_ProxyMesh::Ptr( new SMESH_ProxyMesh( components ));
969 return SMESH_ProxyMesh::Ptr();
970 } // --------------------------------------------------------------------------------
971 std::ostream & StdMeshers_ViscousLayers::SaveTo(std::ostream & save)
973 save << " " << _nbLayers
975 << " " << _stretchFactor
976 << " " << _shapeIds.size();
977 for ( size_t i = 0; i < _shapeIds.size(); ++i )
978 save << " " << _shapeIds[i];
979 save << " " << !_isToIgnoreShapes; // negate to keep the behavior in old studies.
980 save << " " << _method;
982 } // --------------------------------------------------------------------------------
983 std::istream & StdMeshers_ViscousLayers::LoadFrom(std::istream & load)
985 int nbFaces, faceID, shapeToTreat, method;
986 load >> _nbLayers >> _thickness >> _stretchFactor >> nbFaces;
987 while ( _shapeIds.size() < nbFaces && load >> faceID )
988 _shapeIds.push_back( faceID );
989 if ( load >> shapeToTreat ) {
990 _isToIgnoreShapes = !shapeToTreat;
991 if ( load >> method )
992 _method = (ExtrusionMethod) method;
995 _isToIgnoreShapes = true; // old behavior
998 } // --------------------------------------------------------------------------------
999 bool StdMeshers_ViscousLayers::SetParametersByMesh(const SMESH_Mesh* theMesh,
1000 const TopoDS_Shape& theShape)
1004 } // --------------------------------------------------------------------------------
1005 SMESH_ComputeErrorPtr
1006 StdMeshers_ViscousLayers::CheckHypothesis(SMESH_Mesh& theMesh,
1007 const TopoDS_Shape& theShape,
1008 SMESH_Hypothesis::Hypothesis_Status& theStatus)
1010 VISCOUS_3D::_ViscousBuilder bulder;
1011 SMESH_ComputeErrorPtr err = bulder.CheckHypotheses( theMesh, theShape );
1012 if ( err && !err->IsOK() )
1013 theStatus = SMESH_Hypothesis::HYP_INCOMPAT_HYPS;
1015 theStatus = SMESH_Hypothesis::HYP_OK;
1019 // --------------------------------------------------------------------------------
1020 bool StdMeshers_ViscousLayers::IsShapeWithLayers(int shapeIndex) const
1023 ( std::find( _shapeIds.begin(), _shapeIds.end(), shapeIndex ) != _shapeIds.end() );
1024 return IsToIgnoreShapes() ? !isIn : isIn;
1026 // END StdMeshers_ViscousLayers hypothesis
1027 //================================================================================
1029 namespace VISCOUS_3D
1031 gp_XYZ getEdgeDir( const TopoDS_Edge& E, const TopoDS_Vertex& fromV )
1035 Handle(Geom_Curve) c = BRep_Tool::Curve( E, f, l );
1036 gp_Pnt p = BRep_Tool::Pnt( fromV );
1037 double distF = p.SquareDistance( c->Value( f ));
1038 double distL = p.SquareDistance( c->Value( l ));
1039 c->D1(( distF < distL ? f : l), p, dir );
1040 if ( distL < distF ) dir.Reverse();
1043 //--------------------------------------------------------------------------------
1044 gp_XYZ getEdgeDir( const TopoDS_Edge& E, const SMDS_MeshNode* atNode,
1045 SMESH_MesherHelper& helper)
1048 double f,l; gp_Pnt p;
1049 Handle(Geom_Curve) c = BRep_Tool::Curve( E, f, l );
1050 if ( c.IsNull() ) return gp_XYZ( 1e100, 1e100, 1e100 );
1051 double u = helper.GetNodeU( E, atNode );
1055 //--------------------------------------------------------------------------------
1056 gp_XYZ getFaceDir( const TopoDS_Face& F, const TopoDS_Vertex& fromV,
1057 const SMDS_MeshNode* node, SMESH_MesherHelper& helper, bool& ok,
1059 //--------------------------------------------------------------------------------
1060 gp_XYZ getFaceDir( const TopoDS_Face& F, const TopoDS_Edge& fromE,
1061 const SMDS_MeshNode* node, SMESH_MesherHelper& helper, bool& ok)
1064 Handle(Geom_Curve) c = BRep_Tool::Curve( fromE, f, l );
1067 TopoDS_Vertex v = helper.IthVertex( 0, fromE );
1068 return getFaceDir( F, v, node, helper, ok );
1070 gp_XY uv = helper.GetNodeUV( F, node, 0, &ok );
1071 Handle(Geom_Surface) surface = BRep_Tool::Surface( F );
1072 gp_Pnt p; gp_Vec du, dv, norm;
1073 surface->D1( uv.X(),uv.Y(), p, du,dv );
1076 double u = helper.GetNodeU( fromE, node, 0, &ok );
1078 TopAbs_Orientation o = helper.GetSubShapeOri( F.Oriented(TopAbs_FORWARD), fromE);
1079 if ( o == TopAbs_REVERSED )
1082 gp_Vec dir = norm ^ du;
1084 if ( node->GetPosition()->GetTypeOfPosition() == SMDS_TOP_VERTEX &&
1085 helper.IsClosedEdge( fromE ))
1087 if ( fabs(u-f) < fabs(u-l)) c->D1( l, p, dv );
1088 else c->D1( f, p, dv );
1089 if ( o == TopAbs_REVERSED )
1091 gp_Vec dir2 = norm ^ dv;
1092 dir = dir.Normalized() + dir2.Normalized();
1096 //--------------------------------------------------------------------------------
1097 gp_XYZ getFaceDir( const TopoDS_Face& F, const TopoDS_Vertex& fromV,
1098 const SMDS_MeshNode* node, SMESH_MesherHelper& helper,
1099 bool& ok, double* cosin)
1101 TopoDS_Face faceFrw = F;
1102 faceFrw.Orientation( TopAbs_FORWARD );
1103 double f,l; TopLoc_Location loc;
1104 TopoDS_Edge edges[2]; // sharing a vertex
1107 TopoDS_Vertex VV[2];
1108 TopExp_Explorer exp( faceFrw, TopAbs_EDGE );
1109 for ( ; exp.More() && nbEdges < 2; exp.Next() )
1111 const TopoDS_Edge& e = TopoDS::Edge( exp.Current() );
1112 if ( SMESH_Algo::isDegenerated( e )) continue;
1113 TopExp::Vertices( e, VV[0], VV[1], /*CumOri=*/true );
1114 if ( VV[1].IsSame( fromV )) {
1115 nbEdges += edges[ 0 ].IsNull();
1118 else if ( VV[0].IsSame( fromV )) {
1119 nbEdges += edges[ 1 ].IsNull();
1124 gp_XYZ dir(0,0,0), edgeDir[2];
1127 // get dirs of edges going fromV
1129 for ( size_t i = 0; i < nbEdges && ok; ++i )
1131 edgeDir[i] = getEdgeDir( edges[i], fromV );
1132 double size2 = edgeDir[i].SquareModulus();
1133 if (( ok = size2 > numeric_limits<double>::min() ))
1134 edgeDir[i] /= sqrt( size2 );
1136 if ( !ok ) return dir;
1138 // get angle between the 2 edges
1140 double angle = helper.GetAngle( edges[0], edges[1], faceFrw, fromV, &faceNormal );
1141 if ( Abs( angle ) < 5 * M_PI/180 )
1143 dir = ( faceNormal.XYZ() ^ edgeDir[0].Reversed()) + ( faceNormal.XYZ() ^ edgeDir[1] );
1147 dir = edgeDir[0] + edgeDir[1];
1152 double angle = gp_Vec( edgeDir[0] ).Angle( dir );
1153 *cosin = Cos( angle );
1156 else if ( nbEdges == 1 )
1158 dir = getFaceDir( faceFrw, edges[ edges[0].IsNull() ], node, helper, ok );
1159 if ( cosin ) *cosin = 1.;
1169 //================================================================================
1171 * \brief Finds concave VERTEXes of a FACE
1173 //================================================================================
1175 bool getConcaveVertices( const TopoDS_Face& F,
1176 SMESH_MesherHelper& helper,
1177 set< TGeomID >* vertices = 0)
1179 // check angles at VERTEXes
1181 TSideVector wires = StdMeshers_FaceSide::GetFaceWires( F, *helper.GetMesh(), 0, error );
1182 for ( size_t iW = 0; iW < wires.size(); ++iW )
1184 const int nbEdges = wires[iW]->NbEdges();
1185 if ( nbEdges < 2 && SMESH_Algo::isDegenerated( wires[iW]->Edge(0)))
1187 for ( int iE1 = 0; iE1 < nbEdges; ++iE1 )
1189 if ( SMESH_Algo::isDegenerated( wires[iW]->Edge( iE1 ))) continue;
1190 int iE2 = ( iE1 + 1 ) % nbEdges;
1191 while ( SMESH_Algo::isDegenerated( wires[iW]->Edge( iE2 )))
1192 iE2 = ( iE2 + 1 ) % nbEdges;
1193 TopoDS_Vertex V = wires[iW]->FirstVertex( iE2 );
1194 double angle = helper.GetAngle( wires[iW]->Edge( iE1 ),
1195 wires[iW]->Edge( iE2 ), F, V );
1196 if ( angle < -5. * M_PI / 180. )
1200 vertices->insert( helper.GetMeshDS()->ShapeToIndex( V ));
1204 return vertices ? !vertices->empty() : false;
1207 //================================================================================
1209 * \brief Returns true if a FACE is bound by a concave EDGE
1211 //================================================================================
1213 bool isConcave( const TopoDS_Face& F,
1214 SMESH_MesherHelper& helper,
1215 set< TGeomID >* vertices = 0 )
1217 bool isConcv = false;
1218 // if ( helper.Count( F, TopAbs_WIRE, /*useMap=*/false) > 1 )
1220 gp_Vec2d drv1, drv2;
1222 TopExp_Explorer eExp( F.Oriented( TopAbs_FORWARD ), TopAbs_EDGE );
1223 for ( ; eExp.More(); eExp.Next() )
1225 const TopoDS_Edge& E = TopoDS::Edge( eExp.Current() );
1226 if ( SMESH_Algo::isDegenerated( E )) continue;
1227 // check if 2D curve is concave
1228 BRepAdaptor_Curve2d curve( E, F );
1229 const int nbIntervals = curve.NbIntervals( GeomAbs_C2 );
1230 TColStd_Array1OfReal intervals(1, nbIntervals + 1 );
1231 curve.Intervals( intervals, GeomAbs_C2 );
1232 bool isConvex = true;
1233 for ( int i = 1; i <= nbIntervals && isConvex; ++i )
1235 double u1 = intervals( i );
1236 double u2 = intervals( i+1 );
1237 curve.D2( 0.5*( u1+u2 ), p, drv1, drv2 );
1238 double cross = drv2 ^ drv1;
1239 if ( E.Orientation() == TopAbs_REVERSED )
1241 isConvex = ( cross > 0.1 ); //-1e-9 );
1245 //cout << "Concave FACE " << helper.GetMeshDS()->ShapeToIndex( F ) << endl;
1254 // check angles at VERTEXes
1255 if ( getConcaveVertices( F, helper, vertices ))
1261 //================================================================================
1263 * \brief Computes mimimal distance of face in-FACE nodes from an EDGE
1264 * \param [in] face - the mesh face to treat
1265 * \param [in] nodeOnEdge - a node on the EDGE
1266 * \param [out] faceSize - the computed distance
1267 * \return bool - true if faceSize computed
1269 //================================================================================
1271 bool getDistFromEdge( const SMDS_MeshElement* face,
1272 const SMDS_MeshNode* nodeOnEdge,
1275 faceSize = Precision::Infinite();
1278 int nbN = face->NbCornerNodes();
1279 int iOnE = face->GetNodeIndex( nodeOnEdge );
1280 int iNext[2] = { SMESH_MesherHelper::WrapIndex( iOnE+1, nbN ),
1281 SMESH_MesherHelper::WrapIndex( iOnE-1, nbN ) };
1282 const SMDS_MeshNode* nNext[2] = { face->GetNode( iNext[0] ),
1283 face->GetNode( iNext[1] ) };
1284 gp_XYZ segVec, segEnd = SMESH_TNodeXYZ( nodeOnEdge ); // segment on EDGE
1285 double segLen = -1.;
1286 // look for two neighbor not in-FACE nodes of face
1287 for ( int i = 0; i < 2; ++i )
1289 if ( nNext[i]->GetPosition()->GetDim() != 2 &&
1290 nNext[i]->GetID() < nodeOnEdge->GetID() )
1292 // look for an in-FACE node
1293 for ( int iN = 0; iN < nbN; ++iN )
1295 if ( iN == iOnE || iN == iNext[i] )
1297 SMESH_TNodeXYZ pInFace = face->GetNode( iN );
1298 gp_XYZ v = pInFace - segEnd;
1301 segVec = SMESH_TNodeXYZ( nNext[i] ) - segEnd;
1302 segLen = segVec.Modulus();
1304 double distToSeg = v.Crossed( segVec ).Modulus() / segLen;
1305 faceSize = Min( faceSize, distToSeg );
1313 //================================================================================
1315 * \brief Return direction of axis or revolution of a surface
1317 //================================================================================
1319 bool getRovolutionAxis( const Adaptor3d_Surface& surface,
1322 switch ( surface.GetType() ) {
1325 gp_Cone cone = surface.Cone();
1326 axis = cone.Axis().Direction();
1329 case GeomAbs_Sphere:
1331 gp_Sphere sphere = surface.Sphere();
1332 axis = sphere.Position().Direction();
1335 case GeomAbs_SurfaceOfRevolution:
1337 axis = surface.AxeOfRevolution().Direction();
1340 //case GeomAbs_SurfaceOfExtrusion:
1341 case GeomAbs_OffsetSurface:
1343 Handle(Adaptor3d_HSurface) base = surface.BasisSurface();
1344 return getRovolutionAxis( base->Surface(), axis );
1346 default: return false;
1351 //--------------------------------------------------------------------------------
1352 // DEBUG. Dump intermediate node positions into a python script
1353 // HOWTO use: run python commands written in a console to see
1354 // construction steps of viscous layers
1359 PyDump(SMESH_Mesh& m) {
1360 int tag = 3 + m.GetId();
1361 const char* fname = "/tmp/viscous.py";
1362 cout << "execfile('"<<fname<<"')"<<endl;
1363 py = new ofstream(fname);
1364 *py << "import SMESH" << endl
1365 << "from salome.smesh import smeshBuilder" << endl
1366 << "smesh = smeshBuilder.New(salome.myStudy)" << endl
1367 << "meshSO = smesh.GetCurrentStudy().FindObjectID('0:1:2:" << tag <<"')" << endl
1368 << "mesh = smesh.Mesh( meshSO.GetObject() )"<<endl;
1373 *py << "mesh.GroupOnFilter(SMESH.VOLUME,'Viscous Prisms',"
1374 "smesh.GetFilter(SMESH.VOLUME,SMESH.FT_ElemGeomType,'=',SMESH.Geom_PENTA))"<<endl;
1375 *py << "mesh.GroupOnFilter(SMESH.VOLUME,'Neg Volumes',"
1376 "smesh.GetFilter(SMESH.VOLUME,SMESH.FT_Volume3D,'<',0))"<<endl;
1380 ~PyDump() { Finish(); cout << "NB FUNCTIONS: " << theNbPyFunc << endl; }
1382 #define dumpFunction(f) { _dumpFunction(f, __LINE__);}
1383 #define dumpMove(n) { _dumpMove(n, __LINE__);}
1384 #define dumpMoveComm(n,txt) { _dumpMove(n, __LINE__, txt);}
1385 #define dumpCmd(txt) { _dumpCmd(txt, __LINE__);}
1386 void _dumpFunction(const string& fun, int ln)
1387 { if (py) *py<< "def "<<fun<<"(): # "<< ln <<endl; cout<<fun<<"()"<<endl; ++theNbPyFunc; }
1388 void _dumpMove(const SMDS_MeshNode* n, int ln, const char* txt="")
1389 { if (py) *py<< " mesh.MoveNode( "<<n->GetID()<< ", "<< n->X()
1390 << ", "<<n->Y()<<", "<< n->Z()<< ")\t\t # "<< ln <<" "<< txt << endl; }
1391 void _dumpCmd(const string& txt, int ln)
1392 { if (py) *py<< " "<<txt<<" # "<< ln <<endl; }
1393 void dumpFunctionEnd()
1394 { if (py) *py<< " return"<< endl; }
1395 void dumpChangeNodes( const SMDS_MeshElement* f )
1396 { if (py) { *py<< " mesh.ChangeElemNodes( " << f->GetID()<<", [";
1397 for ( int i=1; i < f->NbNodes(); ++i ) *py << f->GetNode(i-1)->GetID()<<", ";
1398 *py << f->GetNode( f->NbNodes()-1 )->GetID() << " ])"<< endl; }}
1399 #define debugMsg( txt ) { cout << txt << " (line: " << __LINE__ << ")" << endl; }
1401 struct PyDump { PyDump(SMESH_Mesh&) {} void Finish() {} };
1402 #define dumpFunction(f) f
1404 #define dumpMoveComm(n,txt)
1405 #define dumpCmd(txt)
1406 #define dumpFunctionEnd()
1407 #define dumpChangeNodes(f)
1408 #define debugMsg( txt ) {}
1412 using namespace VISCOUS_3D;
1414 //================================================================================
1416 * \brief Constructor of _ViscousBuilder
1418 //================================================================================
1420 _ViscousBuilder::_ViscousBuilder()
1422 _error = SMESH_ComputeError::New(COMPERR_OK);
1426 //================================================================================
1428 * \brief Stores error description and returns false
1430 //================================================================================
1432 bool _ViscousBuilder::error(const string& text, int solidId )
1434 const string prefix = string("Viscous layers builder: ");
1435 _error->myName = COMPERR_ALGO_FAILED;
1436 _error->myComment = prefix + text;
1439 SMESH_subMesh* sm = _mesh->GetSubMeshContaining( solidId );
1440 if ( !sm && !_sdVec.empty() )
1441 sm = _mesh->GetSubMeshContaining( solidId = _sdVec[0]._index );
1442 if ( sm && sm->GetSubShape().ShapeType() == TopAbs_SOLID )
1444 SMESH_ComputeErrorPtr& smError = sm->GetComputeError();
1445 if ( smError && smError->myAlgo )
1446 _error->myAlgo = smError->myAlgo;
1448 sm->ComputeStateEngine( SMESH_subMesh::CHECK_COMPUTE_STATE );
1450 // set KO to all solids
1451 for ( size_t i = 0; i < _sdVec.size(); ++i )
1453 if ( _sdVec[i]._index == solidId )
1455 sm = _mesh->GetSubMesh( _sdVec[i]._solid );
1456 if ( !sm->IsEmpty() )
1458 SMESH_ComputeErrorPtr& smError = sm->GetComputeError();
1459 if ( !smError || smError->IsOK() )
1461 smError = SMESH_ComputeError::New( COMPERR_ALGO_FAILED, prefix + "failed");
1462 sm->ComputeStateEngine( SMESH_subMesh::CHECK_COMPUTE_STATE );
1466 makeGroupOfLE(); // debug
1471 //================================================================================
1473 * \brief At study restoration, restore event listeners used to clear an inferior
1474 * dim sub-mesh modified by viscous layers
1476 //================================================================================
1478 void _ViscousBuilder::RestoreListeners()
1483 //================================================================================
1485 * \brief computes SMESH_ProxyMesh::SubMesh::_n2n
1487 //================================================================================
1489 bool _ViscousBuilder::MakeN2NMap( _MeshOfSolid* pm )
1491 SMESH_subMesh* solidSM = pm->mySubMeshes.front();
1492 TopExp_Explorer fExp( solidSM->GetSubShape(), TopAbs_FACE );
1493 for ( ; fExp.More(); fExp.Next() )
1495 SMESHDS_SubMesh* srcSmDS = pm->GetMeshDS()->MeshElements( fExp.Current() );
1496 const SMESH_ProxyMesh::SubMesh* prxSmDS = pm->GetProxySubMesh( fExp.Current() );
1498 if ( !srcSmDS || !prxSmDS || !srcSmDS->NbElements() || !prxSmDS->NbElements() )
1500 if ( srcSmDS->GetElements()->next() == prxSmDS->GetElements()->next())
1503 if ( srcSmDS->NbElements() != prxSmDS->NbElements() )
1504 return error( "Different nb elements in a source and a proxy sub-mesh", solidSM->GetId());
1506 SMDS_ElemIteratorPtr srcIt = srcSmDS->GetElements();
1507 SMDS_ElemIteratorPtr prxIt = prxSmDS->GetElements();
1508 while( prxIt->more() )
1510 const SMDS_MeshElement* fSrc = srcIt->next();
1511 const SMDS_MeshElement* fPrx = prxIt->next();
1512 if ( fSrc->NbNodes() != fPrx->NbNodes())
1513 return error( "Different elements in a source and a proxy sub-mesh", solidSM->GetId());
1514 for ( int i = 0 ; i < fPrx->NbNodes(); ++i )
1515 pm->setNode2Node( fSrc->GetNode(i), fPrx->GetNode(i), prxSmDS );
1518 pm->_n2nMapComputed = true;
1522 //================================================================================
1524 * \brief Does its job
1526 //================================================================================
1528 SMESH_ComputeErrorPtr _ViscousBuilder::Compute(SMESH_Mesh& theMesh,
1529 const TopoDS_Shape& theShape)
1531 // TODO: set priority of solids during Gen::Compute()
1535 // check if proxy mesh already computed
1536 TopExp_Explorer exp( theShape, TopAbs_SOLID );
1538 return error("No SOLID's in theShape"), _error;
1540 if ( _ViscousListener::GetSolidMesh( _mesh, exp.Current(), /*toCreate=*/false))
1541 return SMESH_ComputeErrorPtr(); // everything already computed
1543 PyDump debugDump( theMesh );
1545 // TODO: ignore already computed SOLIDs
1546 if ( !findSolidsWithLayers())
1549 if ( !findFacesWithLayers() )
1552 for ( size_t i = 0; i < _sdVec.size(); ++i )
1554 if ( ! makeLayer(_sdVec[i]) )
1557 if ( _sdVec[i]._n2eMap.size() == 0 )
1560 if ( ! inflate(_sdVec[i]) )
1563 if ( ! refine(_sdVec[i]) )
1569 addBoundaryElements();
1571 makeGroupOfLE(); // debug
1577 //================================================================================
1579 * \brief Check validity of hypotheses
1581 //================================================================================
1583 SMESH_ComputeErrorPtr _ViscousBuilder::CheckHypotheses( SMESH_Mesh& mesh,
1584 const TopoDS_Shape& shape )
1588 if ( _ViscousListener::GetSolidMesh( _mesh, shape, /*toCreate=*/false))
1589 return SMESH_ComputeErrorPtr(); // everything already computed
1592 findSolidsWithLayers();
1593 bool ok = findFacesWithLayers( true );
1595 // remove _MeshOfSolid's of _SolidData's
1596 for ( size_t i = 0; i < _sdVec.size(); ++i )
1597 _ViscousListener::RemoveSolidMesh( _mesh, _sdVec[i]._solid );
1602 return SMESH_ComputeErrorPtr();
1605 //================================================================================
1607 * \brief Finds SOLIDs to compute using viscous layers. Fills _sdVec
1609 //================================================================================
1611 bool _ViscousBuilder::findSolidsWithLayers()
1614 TopTools_IndexedMapOfShape allSolids;
1615 TopExp::MapShapes( _mesh->GetShapeToMesh(), TopAbs_SOLID, allSolids );
1616 _sdVec.reserve( allSolids.Extent());
1618 SMESH_Gen* gen = _mesh->GetGen();
1619 SMESH_HypoFilter filter;
1620 for ( int i = 1; i <= allSolids.Extent(); ++i )
1622 // find StdMeshers_ViscousLayers hyp assigned to the i-th solid
1623 SMESH_Algo* algo = gen->GetAlgo( *_mesh, allSolids(i) );
1624 if ( !algo ) continue;
1625 // TODO: check if algo is hidden
1626 const list <const SMESHDS_Hypothesis *> & allHyps =
1627 algo->GetUsedHypothesis(*_mesh, allSolids(i), /*ignoreAuxiliary=*/false);
1628 _SolidData* soData = 0;
1629 list< const SMESHDS_Hypothesis *>::const_iterator hyp = allHyps.begin();
1630 const StdMeshers_ViscousLayers* viscHyp = 0;
1631 for ( ; hyp != allHyps.end(); ++hyp )
1632 if ( viscHyp = dynamic_cast<const StdMeshers_ViscousLayers*>( *hyp ))
1634 TopoDS_Shape hypShape;
1635 filter.Init( filter.Is( viscHyp ));
1636 _mesh->GetHypothesis( allSolids(i), filter, true, &hypShape );
1640 _MeshOfSolid* proxyMesh = _ViscousListener::GetSolidMesh( _mesh,
1643 _sdVec.push_back( _SolidData( allSolids(i), proxyMesh ));
1644 soData = & _sdVec.back();
1645 soData->_index = getMeshDS()->ShapeToIndex( allSolids(i));
1647 soData->_hyps.push_back( viscHyp );
1648 soData->_hypShapes.push_back( hypShape );
1651 if ( _sdVec.empty() )
1653 ( SMESH_Comment(StdMeshers_ViscousLayers::GetHypType()) << " hypothesis not found",0);
1658 //================================================================================
1662 //================================================================================
1664 bool _ViscousBuilder::findFacesWithLayers(const bool onlyWith)
1666 SMESH_MesherHelper helper( *_mesh );
1667 TopExp_Explorer exp;
1668 TopTools_IndexedMapOfShape solids;
1670 // collect all faces-to-ignore defined by hyp
1671 for ( size_t i = 0; i < _sdVec.size(); ++i )
1673 solids.Add( _sdVec[i]._solid );
1675 // get faces-to-ignore defined by each hyp
1676 typedef const StdMeshers_ViscousLayers* THyp;
1677 typedef std::pair< set<TGeomID>, THyp > TFacesOfHyp;
1678 list< TFacesOfHyp > ignoreFacesOfHyps;
1679 list< THyp >::iterator hyp = _sdVec[i]._hyps.begin();
1680 list< TopoDS_Shape >::iterator hypShape = _sdVec[i]._hypShapes.begin();
1681 for ( ; hyp != _sdVec[i]._hyps.end(); ++hyp, ++hypShape )
1683 ignoreFacesOfHyps.push_back( TFacesOfHyp( set<TGeomID>(), *hyp ));
1684 getIgnoreFaces( _sdVec[i]._solid, *hyp, *hypShape, ignoreFacesOfHyps.back().first );
1687 // fill _SolidData::_face2hyp and check compatibility of hypotheses
1688 const int nbHyps = _sdVec[i]._hyps.size();
1691 // check if two hypotheses define different parameters for the same FACE
1692 list< TFacesOfHyp >::iterator igFacesOfHyp;
1693 for ( exp.Init( _sdVec[i]._solid, TopAbs_FACE ); exp.More(); exp.Next() )
1695 const TGeomID faceID = getMeshDS()->ShapeToIndex( exp.Current() );
1697 igFacesOfHyp = ignoreFacesOfHyps.begin();
1698 for ( ; igFacesOfHyp != ignoreFacesOfHyps.end(); ++igFacesOfHyp )
1699 if ( ! igFacesOfHyp->first.count( faceID ))
1702 return error(SMESH_Comment("Several hypotheses define "
1703 "Viscous Layers on the face #") << faceID );
1704 hyp = igFacesOfHyp->second;
1707 _sdVec[i]._face2hyp.insert( make_pair( faceID, hyp ));
1709 _sdVec[i]._ignoreFaceIds.insert( faceID );
1712 // check if two hypotheses define different number of viscous layers for
1713 // adjacent faces of a solid
1714 set< int > nbLayersSet;
1715 igFacesOfHyp = ignoreFacesOfHyps.begin();
1716 for ( ; igFacesOfHyp != ignoreFacesOfHyps.end(); ++igFacesOfHyp )
1718 nbLayersSet.insert( igFacesOfHyp->second->GetNumberLayers() );
1720 if ( nbLayersSet.size() > 1 )
1722 for ( exp.Init( _sdVec[i]._solid, TopAbs_EDGE ); exp.More(); exp.Next() )
1724 PShapeIteratorPtr fIt = helper.GetAncestors( exp.Current(), *_mesh, TopAbs_FACE );
1725 THyp hyp1 = 0, hyp2 = 0;
1726 while( const TopoDS_Shape* face = fIt->next() )
1728 const TGeomID faceID = getMeshDS()->ShapeToIndex( *face );
1729 map< TGeomID, THyp >::iterator f2h = _sdVec[i]._face2hyp.find( faceID );
1730 if ( f2h != _sdVec[i]._face2hyp.end() )
1732 ( hyp1 ? hyp2 : hyp1 ) = f2h->second;
1735 if ( hyp1 && hyp2 &&
1736 hyp1->GetNumberLayers() != hyp2->GetNumberLayers() )
1738 return error("Two hypotheses define different number of "
1739 "viscous layers on adjacent faces");
1743 } // if ( nbHyps > 1 )
1746 _sdVec[i]._ignoreFaceIds.swap( ignoreFacesOfHyps.back().first );
1750 if ( onlyWith ) // is called to check hypotheses compatibility only
1753 // fill _SolidData::_reversedFaceIds
1754 for ( size_t i = 0; i < _sdVec.size(); ++i )
1756 exp.Init( _sdVec[i]._solid.Oriented( TopAbs_FORWARD ), TopAbs_FACE );
1757 for ( ; exp.More(); exp.Next() )
1759 const TopoDS_Face& face = TopoDS::Face( exp.Current() );
1760 const TGeomID faceID = getMeshDS()->ShapeToIndex( face );
1761 if ( //!sdVec[i]._ignoreFaceIds.count( faceID ) &&
1762 helper.NbAncestors( face, *_mesh, TopAbs_SOLID ) > 1 &&
1763 helper.IsReversedSubMesh( face ))
1765 _sdVec[i]._reversedFaceIds.insert( faceID );
1770 // Find faces to shrink mesh on (solution 2 in issue 0020832);
1771 TopTools_IndexedMapOfShape shapes;
1772 for ( size_t i = 0; i < _sdVec.size(); ++i )
1775 TopExp::MapShapes(_sdVec[i]._solid, TopAbs_EDGE, shapes);
1776 for ( int iE = 1; iE <= shapes.Extent(); ++iE )
1778 const TopoDS_Shape& edge = shapes(iE);
1779 // find 2 faces sharing an edge
1781 PShapeIteratorPtr fIt = helper.GetAncestors(edge, *_mesh, TopAbs_FACE);
1782 while ( fIt->more())
1784 const TopoDS_Shape* f = fIt->next();
1785 if ( helper.IsSubShape( *f, _sdVec[i]._solid))
1786 FF[ int( !FF[0].IsNull()) ] = *f;
1788 if( FF[1].IsNull() ) continue; // seam edge can be shared by 1 FACE only
1789 // check presence of layers on them
1791 for ( int j = 0; j < 2; ++j )
1792 ignore[j] = _sdVec[i]._ignoreFaceIds.count ( getMeshDS()->ShapeToIndex( FF[j] ));
1793 if ( ignore[0] == ignore[1] )
1794 continue; // nothing interesting
1795 TopoDS_Shape fWOL = FF[ ignore[0] ? 0 : 1 ];
1796 // check presence of layers on fWOL within an adjacent SOLID
1797 bool collision = false;
1798 PShapeIteratorPtr sIt = helper.GetAncestors( fWOL, *_mesh, TopAbs_SOLID );
1799 while ( const TopoDS_Shape* solid = sIt->next() )
1800 if ( !solid->IsSame( _sdVec[i]._solid ))
1802 int iSolid = solids.FindIndex( *solid );
1803 int iFace = getMeshDS()->ShapeToIndex( fWOL );
1804 if ( iSolid > 0 && !_sdVec[ iSolid-1 ]._ignoreFaceIds.count( iFace ))
1806 //_sdVec[i]._noShrinkShapes.insert( iFace );
1812 if ( !fWOL.IsNull())
1814 TGeomID edgeInd = getMeshDS()->ShapeToIndex( edge );
1815 _sdVec[i]._shrinkShape2Shape.insert( make_pair( edgeInd, fWOL ));
1818 // _shrinkShape2Shape will be used to temporary inflate _LayerEdge's based
1819 // on the edge but shrink won't be performed
1820 _sdVec[i]._noShrinkShapes.insert( edgeInd );
1825 // Exclude from _shrinkShape2Shape FACE's that can't be shrinked since
1826 // the algo of the SOLID sharing the FACE does not support it
1827 set< string > notSupportAlgos; notSupportAlgos.insert("Hexa_3D");
1828 for ( size_t i = 0; i < _sdVec.size(); ++i )
1830 map< TGeomID, TopoDS_Shape >::iterator e2f = _sdVec[i]._shrinkShape2Shape.begin();
1831 for ( ; e2f != _sdVec[i]._shrinkShape2Shape.end(); ++e2f )
1833 const TopoDS_Shape& fWOL = e2f->second;
1834 const TGeomID edgeID = e2f->first;
1835 bool notShrinkFace = false;
1836 PShapeIteratorPtr soIt = helper.GetAncestors(fWOL, *_mesh, TopAbs_SOLID);
1837 while ( soIt->more() )
1839 const TopoDS_Shape* solid = soIt->next();
1840 if ( _sdVec[i]._solid.IsSame( *solid )) continue;
1841 SMESH_Algo* algo = _mesh->GetGen()->GetAlgo( *_mesh, *solid );
1842 if ( !algo || !notSupportAlgos.count( algo->GetName() )) continue;
1843 notShrinkFace = true;
1845 for ( ; iSolid < _sdVec.size(); ++iSolid )
1847 if ( _sdVec[iSolid]._solid.IsSame( *solid ) ) {
1848 if ( _sdVec[iSolid]._shrinkShape2Shape.count( edgeID ))
1849 notShrinkFace = false;
1853 if ( notShrinkFace )
1855 _sdVec[i]._noShrinkShapes.insert( edgeID );
1857 // add VERTEXes of the edge in _noShrinkShapes
1858 TopoDS_Shape edge = getMeshDS()->IndexToShape( edgeID );
1859 for ( TopoDS_Iterator vIt( edge ); vIt.More(); vIt.Next() )
1860 _sdVec[i]._noShrinkShapes.insert( getMeshDS()->ShapeToIndex( vIt.Value() ));
1862 // check if there is a collision with to-shrink-from EDGEs in iSolid
1863 if ( iSolid == _sdVec.size() )
1864 continue; // no VL in the solid
1866 TopExp::MapShapes( fWOL, TopAbs_EDGE, shapes);
1867 for ( int iE = 1; iE <= shapes.Extent(); ++iE )
1869 const TopoDS_Edge& E = TopoDS::Edge( shapes( iE ));
1870 const TGeomID eID = getMeshDS()->ShapeToIndex( E );
1871 if ( eID == edgeID ||
1872 !_sdVec[iSolid]._shrinkShape2Shape.count( eID ) ||
1873 _sdVec[i]._noShrinkShapes.count( eID ))
1875 for ( int is1st = 0; is1st < 2; ++is1st )
1877 TopoDS_Vertex V = helper.IthVertex( is1st, E );
1878 if ( _sdVec[i]._noShrinkShapes.count( getMeshDS()->ShapeToIndex( V ) ))
1880 // _sdVec[i]._noShrinkShapes.insert( eID );
1881 // V = helper.IthVertex( !is1st, E );
1882 // _sdVec[i]._noShrinkShapes.insert( getMeshDS()->ShapeToIndex( V ));
1883 //iE = 0; // re-start the loop on EDGEs of fWOL
1884 return error("No way to make a conformal mesh with "
1885 "the given set of faces with layers", _sdVec[i]._index);
1891 } // while ( soIt->more() )
1892 } // loop on _sdVec[i]._shrinkShape2Shape
1893 } // loop on _sdVec to fill in _SolidData::_noShrinkShapes
1895 // Find the SHAPE along which to inflate _LayerEdge based on VERTEX
1897 for ( size_t i = 0; i < _sdVec.size(); ++i )
1900 TopExp::MapShapes(_sdVec[i]._solid, TopAbs_VERTEX, shapes);
1901 for ( int iV = 1; iV <= shapes.Extent(); ++iV )
1903 const TopoDS_Shape& vertex = shapes(iV);
1904 // find faces WOL sharing the vertex
1905 vector< TopoDS_Shape > facesWOL;
1906 int totalNbFaces = 0;
1907 PShapeIteratorPtr fIt = helper.GetAncestors(vertex, *_mesh, TopAbs_FACE);
1908 while ( fIt->more())
1910 const TopoDS_Shape* f = fIt->next();
1911 if ( helper.IsSubShape( *f, _sdVec[i]._solid ) )
1914 const int fID = getMeshDS()->ShapeToIndex( *f );
1915 if ( _sdVec[i]._ignoreFaceIds.count ( fID ) /*&&
1916 !_sdVec[i]._noShrinkShapes.count( fID )*/)
1917 facesWOL.push_back( *f );
1920 if ( facesWOL.size() == totalNbFaces || facesWOL.empty() )
1921 continue; // no layers at this vertex or no WOL
1922 TGeomID vInd = getMeshDS()->ShapeToIndex( vertex );
1923 switch ( facesWOL.size() )
1927 helper.SetSubShape( facesWOL[0] );
1928 if ( helper.IsRealSeam( vInd )) // inflate along a seam edge?
1930 TopoDS_Shape seamEdge;
1931 PShapeIteratorPtr eIt = helper.GetAncestors(vertex, *_mesh, TopAbs_EDGE);
1932 while ( eIt->more() && seamEdge.IsNull() )
1934 const TopoDS_Shape* e = eIt->next();
1935 if ( helper.IsRealSeam( *e ) )
1938 if ( !seamEdge.IsNull() )
1940 _sdVec[i]._shrinkShape2Shape.insert( make_pair( vInd, seamEdge ));
1944 _sdVec[i]._shrinkShape2Shape.insert( make_pair( vInd, facesWOL[0] ));
1949 // find an edge shared by 2 faces
1950 PShapeIteratorPtr eIt = helper.GetAncestors(vertex, *_mesh, TopAbs_EDGE);
1951 while ( eIt->more())
1953 const TopoDS_Shape* e = eIt->next();
1954 if ( helper.IsSubShape( *e, facesWOL[0]) &&
1955 helper.IsSubShape( *e, facesWOL[1]))
1957 _sdVec[i]._shrinkShape2Shape.insert( make_pair( vInd, *e )); break;
1963 return error("Not yet supported case", _sdVec[i]._index);
1968 // add FACEs of other SOLIDs to _ignoreFaceIds
1969 for ( size_t i = 0; i < _sdVec.size(); ++i )
1972 TopExp::MapShapes(_sdVec[i]._solid, TopAbs_FACE, shapes);
1974 for ( exp.Init( _mesh->GetShapeToMesh(), TopAbs_FACE ); exp.More(); exp.Next() )
1976 if ( !shapes.Contains( exp.Current() ))
1977 _sdVec[i]._ignoreFaceIds.insert( getMeshDS()->ShapeToIndex( exp.Current() ));
1984 //================================================================================
1986 * \brief Finds FACEs w/o layers for a given SOLID by an hypothesis
1988 //================================================================================
1990 void _ViscousBuilder::getIgnoreFaces(const TopoDS_Shape& solid,
1991 const StdMeshers_ViscousLayers* hyp,
1992 const TopoDS_Shape& hypShape,
1993 set<TGeomID>& ignoreFaceIds)
1995 TopExp_Explorer exp;
1997 vector<TGeomID> ids = hyp->GetBndShapes();
1998 if ( hyp->IsToIgnoreShapes() ) // FACEs to ignore are given
2000 for ( size_t ii = 0; ii < ids.size(); ++ii )
2002 const TopoDS_Shape& s = getMeshDS()->IndexToShape( ids[ii] );
2003 if ( !s.IsNull() && s.ShapeType() == TopAbs_FACE )
2004 ignoreFaceIds.insert( ids[ii] );
2007 else // FACEs with layers are given
2009 exp.Init( solid, TopAbs_FACE );
2010 for ( ; exp.More(); exp.Next() )
2012 TGeomID faceInd = getMeshDS()->ShapeToIndex( exp.Current() );
2013 if ( find( ids.begin(), ids.end(), faceInd ) == ids.end() )
2014 ignoreFaceIds.insert( faceInd );
2018 // ignore internal FACEs if inlets and outlets are specified
2019 if ( hyp->IsToIgnoreShapes() )
2021 TopTools_IndexedDataMapOfShapeListOfShape solidsOfFace;
2022 TopExp::MapShapesAndAncestors( hypShape,
2023 TopAbs_FACE, TopAbs_SOLID, solidsOfFace);
2025 for ( exp.Init( solid, TopAbs_FACE ); exp.More(); exp.Next() )
2027 const TopoDS_Face& face = TopoDS::Face( exp.Current() );
2028 if ( SMESH_MesherHelper::NbAncestors( face, *_mesh, TopAbs_SOLID ) < 2 )
2031 int nbSolids = solidsOfFace.FindFromKey( face ).Extent();
2033 ignoreFaceIds.insert( getMeshDS()->ShapeToIndex( face ));
2038 //================================================================================
2040 * \brief Create the inner surface of the viscous layer and prepare data for infation
2042 //================================================================================
2044 bool _ViscousBuilder::makeLayer(_SolidData& data)
2046 // get all sub-shapes to make layers on
2047 set<TGeomID> subIds, faceIds;
2048 subIds = data._noShrinkShapes;
2049 TopExp_Explorer exp( data._solid, TopAbs_FACE );
2050 for ( ; exp.More(); exp.Next() )
2052 SMESH_subMesh* fSubM = _mesh->GetSubMesh( exp.Current() );
2053 if ( ! data._ignoreFaceIds.count( fSubM->GetId() ))
2055 faceIds.insert( fSubM->GetId() );
2056 SMESH_subMeshIteratorPtr subIt = fSubM->getDependsOnIterator(/*includeSelf=*/true);
2057 while ( subIt->more() )
2058 subIds.insert( subIt->next()->GetId() );
2062 // make a map to find new nodes on sub-shapes shared with other SOLID
2063 map< TGeomID, TNode2Edge* >::iterator s2ne;
2064 map< TGeomID, TopoDS_Shape >::iterator s2s = data._shrinkShape2Shape.begin();
2065 for (; s2s != data._shrinkShape2Shape.end(); ++s2s )
2067 TGeomID shapeInd = s2s->first;
2068 for ( size_t i = 0; i < _sdVec.size(); ++i )
2070 if ( _sdVec[i]._index == data._index ) continue;
2071 map< TGeomID, TopoDS_Shape >::iterator s2s2 = _sdVec[i]._shrinkShape2Shape.find( shapeInd );
2072 if ( s2s2 != _sdVec[i]._shrinkShape2Shape.end() &&
2073 *s2s == *s2s2 && !_sdVec[i]._n2eMap.empty() )
2075 data._s2neMap.insert( make_pair( shapeInd, &_sdVec[i]._n2eMap ));
2081 // Create temporary faces and _LayerEdge's
2083 dumpFunction(SMESH_Comment("makeLayers_")<<data._index);
2085 data._stepSize = Precision::Infinite();
2086 data._stepSizeNodes[0] = 0;
2088 SMESH_MesherHelper helper( *_mesh );
2089 helper.SetSubShape( data._solid );
2090 helper.SetElementsOnShape( true );
2092 vector< const SMDS_MeshNode*> newNodes; // of a mesh face
2093 TNode2Edge::iterator n2e2;
2095 // collect _LayerEdge's of shapes they are based on
2096 vector< _EdgesOnShape >& edgesByGeom = data._edgesOnShape;
2097 const int nbShapes = getMeshDS()->MaxShapeIndex();
2098 edgesByGeom.resize( nbShapes+1 );
2100 // set data of _EdgesOnShape's
2101 if ( SMESH_subMesh* sm = _mesh->GetSubMesh( data._solid ))
2103 SMESH_subMeshIteratorPtr smIt = sm->getDependsOnIterator(/*includeSelf=*/false);
2104 while ( smIt->more() )
2107 if ( sm->GetSubShape().ShapeType() == TopAbs_FACE &&
2108 !faceIds.count( sm->GetId() ))
2110 setShapeData( edgesByGeom[ sm->GetId() ], sm, data );
2113 // make _LayerEdge's
2114 for ( set<TGeomID>::iterator id = faceIds.begin(); id != faceIds.end(); ++id )
2116 const TopoDS_Face& F = TopoDS::Face( getMeshDS()->IndexToShape( *id ));
2117 SMESH_subMesh* sm = _mesh->GetSubMesh( F );
2118 SMESH_ProxyMesh::SubMesh* proxySub =
2119 data._proxyMesh->getFaceSubM( F, /*create=*/true);
2121 SMESHDS_SubMesh* smDS = sm->GetSubMeshDS();
2122 if ( !smDS ) return error(SMESH_Comment("Not meshed face ") << *id, data._index );
2124 SMDS_ElemIteratorPtr eIt = smDS->GetElements();
2125 while ( eIt->more() )
2127 const SMDS_MeshElement* face = eIt->next();
2128 double faceMaxCosin = -1;
2129 _LayerEdge* maxCosinEdge = 0;
2130 int nbDegenNodes = 0;
2132 newNodes.resize( face->NbCornerNodes() );
2133 for ( size_t i = 0 ; i < newNodes.size(); ++i )
2135 const SMDS_MeshNode* n = face->GetNode( i );
2136 const int shapeID = n->getshapeId();
2137 const bool onDegenShap = helper.IsDegenShape( shapeID );
2138 const bool onDegenEdge = ( onDegenShap && n->GetPosition()->GetDim() == 1 );
2143 // substitute n on a degenerated EDGE with a node on a corresponding VERTEX
2144 const TopoDS_Shape& E = getMeshDS()->IndexToShape( shapeID );
2145 TopoDS_Vertex V = helper.IthVertex( 0, TopoDS::Edge( E ));
2146 if ( const SMDS_MeshNode* vN = SMESH_Algo::VertexNode( V, getMeshDS() )) {
2156 TNode2Edge::iterator n2e = data._n2eMap.insert( make_pair( n, (_LayerEdge*)0 )).first;
2157 if ( !(*n2e).second )
2160 _LayerEdge* edge = new _LayerEdge();
2161 edge->_nodes.push_back( n );
2163 edgesByGeom[ shapeID ]._edges.push_back( edge );
2164 const bool noShrink = data._noShrinkShapes.count( shapeID );
2166 SMESH_TNodeXYZ xyz( n );
2168 // set edge data or find already refined _LayerEdge and get data from it
2169 if (( !noShrink ) &&
2170 ( n->GetPosition()->GetTypeOfPosition() != SMDS_TOP_FACE ) &&
2171 (( s2ne = data._s2neMap.find( shapeID )) != data._s2neMap.end() ) &&
2172 (( n2e2 = (*s2ne).second->find( n )) != s2ne->second->end() ))
2174 _LayerEdge* foundEdge = (*n2e2).second;
2175 gp_XYZ lastPos = edge->Copy( *foundEdge, edgesByGeom[ shapeID ], helper );
2176 foundEdge->_pos.push_back( lastPos );
2177 // location of the last node is modified and we restore it by foundEdge->_pos.back()
2178 const_cast< SMDS_MeshNode* >
2179 ( edge->_nodes.back() )->setXYZ( xyz.X(), xyz.Y(), xyz.Z() );
2185 edge->_nodes.push_back( helper.AddNode( xyz.X(), xyz.Y(), xyz.Z() ));
2187 if ( !setEdgeData( *edge, edgesByGeom[ shapeID ], subIds, helper, data ))
2190 dumpMove(edge->_nodes.back());
2192 if ( edge->_cosin > faceMaxCosin )
2194 faceMaxCosin = edge->_cosin;
2195 maxCosinEdge = edge;
2198 newNodes[ i ] = n2e->second->_nodes.back();
2201 data._n2eMap.insert( make_pair( face->GetNode( i ), n2e->second ));
2203 if ( newNodes.size() - nbDegenNodes < 2 )
2206 // create a temporary face
2207 const SMDS_MeshElement* newFace =
2208 new _TmpMeshFace( newNodes, --_tmpFaceID, face->getshapeId() );
2209 proxySub->AddElement( newFace );
2211 // compute inflation step size by min size of element on a convex surface
2212 if ( faceMaxCosin > theMinSmoothCosin )
2213 limitStepSize( data, face, maxCosinEdge );
2215 } // loop on 2D elements on a FACE
2216 } // loop on FACEs of a SOLID
2218 data._epsilon = 1e-7;
2219 if ( data._stepSize < 1. )
2220 data._epsilon *= data._stepSize;
2222 if ( !findShapesToSmooth( data ))
2225 // limit data._stepSize depending on surface curvature and fill data._convexFaces
2226 limitStepSizeByCurvature( data ); // !!! it must be before node substitution in _Simplex
2228 // Set target nodes into _Simplex and _LayerEdge's to _2NearEdges
2229 TNode2Edge::iterator n2e;
2230 const SMDS_MeshNode* nn[2];
2231 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
2233 _EdgesOnShape& eos = data._edgesOnShape[iS];
2234 vector< _LayerEdge* >& localEdges = eos._edges;
2235 for ( size_t i = 0; i < localEdges.size(); ++i )
2237 _LayerEdge* edge = localEdges[i];
2238 if ( edge->IsOnEdge() )
2240 // get neighbor nodes
2241 bool hasData = ( edge->_2neibors->_edges[0] );
2242 if ( hasData ) // _LayerEdge is a copy of another one
2244 nn[0] = edge->_2neibors->srcNode(0);
2245 nn[1] = edge->_2neibors->srcNode(1);
2247 else if ( !findNeiborsOnEdge( edge, nn[0],nn[1], eos, data ))
2251 // set neighbor _LayerEdge's
2252 for ( int j = 0; j < 2; ++j )
2254 if (( n2e = data._n2eMap.find( nn[j] )) == data._n2eMap.end() )
2255 return error("_LayerEdge not found by src node", data._index);
2256 edge->_2neibors->_edges[j] = n2e->second;
2259 edge->SetDataByNeighbors( nn[0], nn[1], eos, helper );
2262 for ( size_t j = 0; j < edge->_simplices.size(); ++j )
2264 _Simplex& s = edge->_simplices[j];
2265 s._nNext = data._n2eMap[ s._nNext ]->_nodes.back();
2266 s._nPrev = data._n2eMap[ s._nPrev ]->_nodes.back();
2269 // For an _LayerEdge on a degenerated EDGE, copy some data from
2270 // a corresponding _LayerEdge on a VERTEX
2271 // (issue 52453, pb on a downloaded SampleCase2-Tet-netgen-mephisto.hdf)
2272 if ( helper.IsDegenShape( edge->_nodes[0]->getshapeId() ))
2274 // Generally we should not get here
2275 if ( eos.ShapeType() != TopAbs_EDGE )
2277 TopoDS_Vertex V = helper.IthVertex( 0, TopoDS::Edge( eos._shape ));
2278 const SMDS_MeshNode* vN = SMESH_Algo::VertexNode( V, getMeshDS() );
2279 if (( n2e = data._n2eMap.find( vN )) == data._n2eMap.end() )
2281 const _LayerEdge* vEdge = n2e->second;
2282 edge->_normal = vEdge->_normal;
2283 edge->_lenFactor = vEdge->_lenFactor;
2284 edge->_cosin = vEdge->_cosin;
2289 // fix _LayerEdge::_2neibors on EDGEs to smooth
2290 map< TGeomID,Handle(Geom_Curve)>::iterator e2c = data._edge2curve.begin();
2291 for ( ; e2c != data._edge2curve.end(); ++e2c )
2292 if ( !e2c->second.IsNull() )
2294 if ( _EdgesOnShape* eos = data.GetShapeEdges( e2c->first ))
2295 data.Sort2NeiborsOnEdge( eos->_edges );
2302 //================================================================================
2304 * \brief Compute inflation step size by min size of element on a convex surface
2306 //================================================================================
2308 void _ViscousBuilder::limitStepSize( _SolidData& data,
2309 const SMDS_MeshElement* face,
2310 const _LayerEdge* maxCosinEdge )
2313 double minSize = 10 * data._stepSize;
2314 const int nbNodes = face->NbCornerNodes();
2315 for ( int i = 0; i < nbNodes; ++i )
2317 const SMDS_MeshNode* nextN = face->GetNode( SMESH_MesherHelper::WrapIndex( i+1, nbNodes ));
2318 const SMDS_MeshNode* curN = face->GetNode( i );
2319 if ( nextN->GetPosition()->GetTypeOfPosition() == SMDS_TOP_FACE ||
2320 curN-> GetPosition()->GetTypeOfPosition() == SMDS_TOP_FACE )
2322 double dist = SMESH_TNodeXYZ( curN ).Distance( nextN );
2323 if ( dist < minSize )
2324 minSize = dist, iN = i;
2327 double newStep = 0.8 * minSize / maxCosinEdge->_lenFactor;
2328 if ( newStep < data._stepSize )
2330 data._stepSize = newStep;
2331 data._stepSizeCoeff = 0.8 / maxCosinEdge->_lenFactor;
2332 data._stepSizeNodes[0] = face->GetNode( iN );
2333 data._stepSizeNodes[1] = face->GetNode( SMESH_MesherHelper::WrapIndex( iN+1, nbNodes ));
2337 //================================================================================
2339 * \brief Compute inflation step size by min size of element on a convex surface
2341 //================================================================================
2343 void _ViscousBuilder::limitStepSize( _SolidData& data, const double minSize )
2345 if ( minSize < data._stepSize )
2347 data._stepSize = minSize;
2348 if ( data._stepSizeNodes[0] )
2351 SMESH_TNodeXYZ(data._stepSizeNodes[0]).Distance(data._stepSizeNodes[1]);
2352 data._stepSizeCoeff = data._stepSize / dist;
2357 //================================================================================
2359 * \brief Limit data._stepSize by evaluating curvature of shapes and fill data._convexFaces
2361 //================================================================================
2363 void _ViscousBuilder::limitStepSizeByCurvature( _SolidData& data )
2365 const int nbTestPnt = 5; // on a FACE sub-shape
2367 BRepLProp_SLProps surfProp( 2, 1e-6 );
2368 SMESH_MesherHelper helper( *_mesh );
2370 data._convexFaces.clear();
2372 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
2374 _EdgesOnShape& eof = data._edgesOnShape[iS];
2375 if ( eof.ShapeType() != TopAbs_FACE ||
2376 data._ignoreFaceIds.count( eof._shapeID ))
2379 TopoDS_Face F = TopoDS::Face( eof._shape );
2380 SMESH_subMesh * sm = eof._subMesh;
2381 const TGeomID faceID = eof._shapeID;
2383 BRepAdaptor_Surface surface( F, false );
2384 surfProp.SetSurface( surface );
2386 bool isTooCurved = false;
2388 _ConvexFace cnvFace;
2389 const double oriFactor = ( F.Orientation() == TopAbs_REVERSED ? +1. : -1. );
2390 SMESH_subMeshIteratorPtr smIt = sm->getDependsOnIterator(/*includeSelf=*/true);
2391 while ( smIt->more() )
2394 const TGeomID subID = sm->GetId();
2395 // find _LayerEdge's of a sub-shape
2397 if (( eos = data.GetShapeEdges( subID )))
2398 cnvFace._subIdToEOS.insert( make_pair( subID, eos ));
2401 // check concavity and curvature and limit data._stepSize
2402 const double minCurvature =
2403 1. / ( eos->_hyp.GetTotalThickness() * ( 1+theThickToIntersection ));
2404 size_t iStep = Max( 1, eos->_edges.size() / nbTestPnt );
2405 for ( size_t i = 0; i < eos->_edges.size(); i += iStep )
2407 gp_XY uv = helper.GetNodeUV( F, eos->_edges[ i ]->_nodes[0] );
2408 surfProp.SetParameters( uv.X(), uv.Y() );
2409 if ( !surfProp.IsCurvatureDefined() )
2411 if ( surfProp.MaxCurvature() * oriFactor > minCurvature )
2413 limitStepSize( data, 0.9 / surfProp.MaxCurvature() * oriFactor );
2416 if ( surfProp.MinCurvature() * oriFactor > minCurvature )
2418 limitStepSize( data, 0.9 / surfProp.MinCurvature() * oriFactor );
2422 } // loop on sub-shapes of the FACE
2424 if ( !isTooCurved ) continue;
2426 _ConvexFace & convFace =
2427 data._convexFaces.insert( make_pair( faceID, cnvFace )).first->second;
2430 convFace._normalsFixed = false;
2432 // Fill _ConvexFace::_simplexTestEdges. These _LayerEdge's are used to detect
2433 // prism distortion.
2434 map< TGeomID, _EdgesOnShape* >::iterator id2eos = convFace._subIdToEOS.find( faceID );
2435 if ( id2eos != convFace._subIdToEOS.end() && !id2eos->second->_edges.empty() )
2437 // there are _LayerEdge's on the FACE it-self;
2438 // select _LayerEdge's near EDGEs
2439 _EdgesOnShape& eos = * id2eos->second;
2440 for ( size_t i = 0; i < eos._edges.size(); ++i )
2442 _LayerEdge* ledge = eos._edges[ i ];
2443 for ( size_t j = 0; j < ledge->_simplices.size(); ++j )
2444 if ( ledge->_simplices[j]._nNext->GetPosition()->GetDim() < 2 )
2446 convFace._simplexTestEdges.push_back( ledge );
2453 // where there are no _LayerEdge's on a _ConvexFace,
2454 // as e.g. on a fillet surface with no internal nodes - issue 22580,
2455 // so that collision of viscous internal faces is not detected by check of
2456 // intersection of _LayerEdge's with the viscous internal faces.
2458 set< const SMDS_MeshNode* > usedNodes;
2460 // look for _LayerEdge's with null _sWOL
2461 id2eos = convFace._subIdToEOS.begin();
2462 for ( ; id2eos != convFace._subIdToEOS.end(); ++id2eos )
2464 _EdgesOnShape& eos = * id2eos->second;
2465 if ( !eos._sWOL.IsNull() )
2467 for ( size_t i = 0; i < eos._edges.size(); ++i )
2469 _LayerEdge* ledge = eos._edges[ i ];
2470 const SMDS_MeshNode* srcNode = ledge->_nodes[0];
2471 if ( !usedNodes.insert( srcNode ).second ) continue;
2473 _Simplex::GetSimplices( srcNode, ledge->_simplices, data._ignoreFaceIds, &data );
2474 for ( size_t i = 0; i < ledge->_simplices.size(); ++i )
2476 usedNodes.insert( ledge->_simplices[i]._nPrev );
2477 usedNodes.insert( ledge->_simplices[i]._nNext );
2479 convFace._simplexTestEdges.push_back( ledge );
2483 } // loop on FACEs of data._solid
2486 //================================================================================
2488 * \brief Detect shapes (and _LayerEdge's on them) to smooth
2490 //================================================================================
2492 bool _ViscousBuilder::findShapesToSmooth( _SolidData& data )
2494 // define allowed thickness
2495 computeGeomSize( data ); // compute data._geomSize
2497 data._maxThickness = 0;
2498 data._minThickness = 1e100;
2499 list< const StdMeshers_ViscousLayers* >::iterator hyp = data._hyps.begin();
2500 for ( ; hyp != data._hyps.end(); ++hyp )
2502 data._maxThickness = Max( data._maxThickness, (*hyp)->GetTotalThickness() );
2503 data._minThickness = Min( data._minThickness, (*hyp)->GetTotalThickness() );
2505 const double tgtThick = /*Min( 0.5 * data._geomSize, */data._maxThickness;
2507 // Find shapes needing smoothing; such a shape has _LayerEdge._normal on it's
2508 // boundry inclined to the shape at a sharp angle
2510 //list< TGeomID > shapesToSmooth;
2511 TopTools_MapOfShape edgesOfSmooFaces;
2513 SMESH_MesherHelper helper( *_mesh );
2516 vector< _EdgesOnShape >& edgesByGeom = data._edgesOnShape;
2517 data._nbShapesToSmooth = 0;
2519 for ( size_t iS = 0; iS < edgesByGeom.size(); ++iS ) // check FACEs
2521 _EdgesOnShape& eos = edgesByGeom[iS];
2522 eos._toSmooth = false;
2523 if ( eos._edges.empty() || eos.ShapeType() != TopAbs_FACE )
2526 TopExp_Explorer eExp( edgesByGeom[iS]._shape, TopAbs_EDGE );
2527 for ( ; eExp.More() && !eos._toSmooth; eExp.Next() )
2529 TGeomID iE = getMeshDS()->ShapeToIndex( eExp.Current() );
2530 vector<_LayerEdge*>& eE = edgesByGeom[ iE ]._edges;
2531 if ( eE.empty() ) continue;
2532 // TopLoc_Location loc;
2533 // Handle(Geom_Surface) surface = BRep_Tool::Surface( TopoDS::Face( S ), loc );
2534 // bool isPlane = GeomLib_IsPlanarSurface( surface ).IsPlanar();
2535 //if ( eE[0]->_sWOL.IsNull() )
2538 for ( size_t i = 0; i < eE.size() && !eos._toSmooth; ++i )
2539 if ( eE[i]->_cosin > theMinSmoothCosin )
2541 SMDS_ElemIteratorPtr fIt = eE[i]->_nodes[0]->GetInverseElementIterator(SMDSAbs_Face);
2542 while ( fIt->more() && !eos._toSmooth )
2544 const SMDS_MeshElement* face = fIt->next();
2545 if ( getDistFromEdge( face, eE[i]->_nodes[0], faceSize ))
2546 eos._toSmooth = needSmoothing( eE[i]->_cosin, tgtThick, faceSize );
2552 // const TopoDS_Face& F1 = TopoDS::Face( S );
2553 // const TopoDS_Face& F2 = TopoDS::Face( eE[0]->_sWOL );
2554 // const TopoDS_Edge& E = TopoDS::Edge( eExp.Current() );
2555 // for ( size_t i = 0; i < eE.size() && !eos._toSmooth; ++i )
2557 // gp_Vec dir1 = getFaceDir( F1, E, eE[i]->_nodes[0], helper, ok );
2558 // gp_Vec dir2 = getFaceDir( F2, E, eE[i]->_nodes[0], helper, ok );
2559 // double angle = dir1.Angle( );
2560 // double cosin = cos( angle );
2561 // eos._toSmooth = ( cosin > theMinSmoothCosin );
2565 if ( eos._toSmooth )
2567 for ( eExp.ReInit(); eExp.More(); eExp.Next() )
2568 edgesOfSmooFaces.Add( eExp.Current() );
2570 data.PrepareEdgesToSmoothOnFace( &edgesByGeom[iS], /*substituteSrcNodes=*/false );
2572 data._nbShapesToSmooth += eos._toSmooth;
2576 for ( size_t iS = 0; iS < edgesByGeom.size(); ++iS ) // check EDGEs
2578 _EdgesOnShape& eos = edgesByGeom[iS];
2579 if ( eos._edges.empty() || eos.ShapeType() != TopAbs_EDGE ) continue;
2580 if ( !eos._hyp.ToSmooth() ) continue;
2582 const TopoDS_Edge& E = TopoDS::Edge( edgesByGeom[iS]._shape );
2583 if ( SMESH_Algo::isDegenerated( E ) || !edgesOfSmooFaces.Contains( E ))
2586 for ( TopoDS_Iterator vIt( E ); vIt.More() && !eos._toSmooth; vIt.Next() )
2588 TGeomID iV = getMeshDS()->ShapeToIndex( vIt.Value() );
2589 vector<_LayerEdge*>& eV = edgesByGeom[ iV ]._edges;
2590 if ( eV.empty() ) continue;
2591 gp_Vec eDir = getEdgeDir( E, TopoDS::Vertex( vIt.Value() ));
2592 double angle = eDir.Angle( eV[0]->_normal );
2593 double cosin = Cos( angle );
2594 double cosinAbs = Abs( cosin );
2595 if ( cosinAbs > theMinSmoothCosin )
2597 // always smooth analytic EDGEs
2598 eos._toSmooth = ! data.CurveForSmooth( E, eos, helper ).IsNull();
2600 // compare tgtThick with the length of an end segment
2601 SMDS_ElemIteratorPtr eIt = eV[0]->_nodes[0]->GetInverseElementIterator(SMDSAbs_Edge);
2602 while ( eIt->more() && !eos._toSmooth )
2604 const SMDS_MeshElement* endSeg = eIt->next();
2605 if ( endSeg->getshapeId() == iS )
2608 SMESH_TNodeXYZ( endSeg->GetNode(0) ).Distance( endSeg->GetNode(1 ));
2609 eos._toSmooth = needSmoothing( cosinAbs, tgtThick, segLen );
2614 data._nbShapesToSmooth += eos._toSmooth;
2618 // Reset _cosin if no smooth is allowed by the user
2619 for ( size_t iS = 0; iS < edgesByGeom.size(); ++iS )
2621 _EdgesOnShape& eos = edgesByGeom[iS];
2622 if ( eos._edges.empty() ) continue;
2624 if ( !eos._hyp.ToSmooth() )
2625 for ( size_t i = 0; i < eos._edges.size(); ++i )
2626 eos._edges[i]->SetCosin( 0 );
2630 // int nbShapes = 0;
2631 // for ( size_t iS = 0; iS < edgesByGeom.size(); ++iS )
2633 // nbShapes += ( edgesByGeom[iS]._edges.size() > 0 );
2635 // data._edgesOnShape.reserve( nbShapes );
2637 // // first we put _LayerEdge's on shapes to smooth (EGDEs go first)
2638 // vector< _LayerEdge* > edges;
2639 // list< TGeomID >::iterator gIt = shapesToSmooth.begin();
2640 // for ( ; gIt != shapesToSmooth.end(); ++gIt )
2642 // _EdgesOnShape& eos = edgesByGeom[ *gIt ];
2643 // if ( eos._edges.empty() ) continue;
2644 // eos._edges.swap( edges ); // avoid copying array
2645 // eos._toSmooth = true;
2646 // data._edgesOnShape.push_back( eos );
2647 // data._edgesOnShape.back()._edges.swap( edges );
2650 // // then the rest _LayerEdge's
2651 // for ( size_t iS = 0; iS < edgesByGeom.size(); ++iS )
2653 // _EdgesOnShape& eos = edgesByGeom[ *gIt ];
2654 // if ( eos._edges.empty() ) continue;
2655 // eos._edges.swap( edges ); // avoid copying array
2656 // eos._toSmooth = false;
2657 // data._edgesOnShape.push_back( eos );
2658 // data._edgesOnShape.back()._edges.swap( edges );
2664 //================================================================================
2666 * \brief initialize data of _EdgesOnShape
2668 //================================================================================
2670 void _ViscousBuilder::setShapeData( _EdgesOnShape& eos,
2674 if ( !eos._shape.IsNull() ||
2675 sm->GetSubShape().ShapeType() == TopAbs_WIRE )
2678 SMESH_MesherHelper helper( *_mesh );
2681 eos._shapeID = sm->GetId();
2682 eos._shape = sm->GetSubShape();
2683 if ( eos.ShapeType() == TopAbs_FACE )
2684 eos._shape.Orientation( helper.GetSubShapeOri( data._solid, eos._shape ));
2685 eos._toSmooth = false;
2688 map< TGeomID, TopoDS_Shape >::const_iterator s2s =
2689 data._shrinkShape2Shape.find( eos._shapeID );
2690 if ( s2s != data._shrinkShape2Shape.end() )
2691 eos._sWOL = s2s->second;
2694 if ( data._hyps.size() == 1 )
2696 eos._hyp = data._hyps.back();
2700 // compute average StdMeshers_ViscousLayers parameters
2701 map< TGeomID, const StdMeshers_ViscousLayers* >::iterator f2hyp;
2702 if ( eos.ShapeType() == TopAbs_FACE )
2704 if (( f2hyp = data._face2hyp.find( eos._shapeID )) != data._face2hyp.end() )
2705 eos._hyp = f2hyp->second;
2709 PShapeIteratorPtr fIt = helper.GetAncestors( eos._shape, *_mesh, TopAbs_FACE );
2710 while ( const TopoDS_Shape* face = fIt->next() )
2712 TGeomID faceID = getMeshDS()->ShapeToIndex( *face );
2713 if (( f2hyp = data._face2hyp.find( faceID )) != data._face2hyp.end() )
2714 eos._hyp.Add( f2hyp->second );
2720 if ( ! eos._hyp.UseSurfaceNormal() )
2722 if ( eos.ShapeType() == TopAbs_FACE ) // get normals to elements on a FACE
2724 SMESHDS_SubMesh* smDS = sm->GetSubMeshDS();
2725 eos._faceNormals.resize( smDS->NbElements() );
2727 SMDS_ElemIteratorPtr eIt = smDS->GetElements();
2728 for ( int iF = 0; eIt->more(); ++iF )
2730 const SMDS_MeshElement* face = eIt->next();
2731 if ( !SMESH_MeshAlgos::FaceNormal( face, eos._faceNormals[iF], /*normalized=*/true ))
2732 eos._faceNormals[iF].SetCoord( 0,0,0 );
2735 if ( !helper.IsReversedSubMesh( TopoDS::Face( eos._shape )))
2736 for ( size_t iF = 0; iF < eos._faceNormals.size(); ++iF )
2737 eos._faceNormals[iF].Reverse();
2739 else // find EOS of adjacent FACEs
2741 PShapeIteratorPtr fIt = helper.GetAncestors( eos._shape, *_mesh, TopAbs_FACE );
2742 while ( const TopoDS_Shape* face = fIt->next() )
2744 TGeomID faceID = getMeshDS()->ShapeToIndex( *face );
2745 eos._faceEOS.push_back( & data._edgesOnShape[ faceID ]);
2746 if ( eos._faceEOS.back()->_shape.IsNull() )
2747 // avoid using uninitialised _shapeID in GetNormal()
2748 eos._faceEOS.back()->_shapeID = faceID;
2754 //================================================================================
2756 * \brief Returns normal of a face
2758 //================================================================================
2760 bool _EdgesOnShape::GetNormal( const SMDS_MeshElement* face, gp_Vec& norm )
2763 const _EdgesOnShape* eos = 0;
2765 if ( face->getshapeId() == _shapeID )
2771 for ( size_t iF = 0; iF < _faceEOS.size() && !eos; ++iF )
2772 if ( face->getshapeId() == _faceEOS[ iF ]->_shapeID )
2773 eos = _faceEOS[ iF ];
2777 ( ok = ( face->getIdInShape() < eos->_faceNormals.size() )))
2779 norm = eos->_faceNormals[ face->getIdInShape() ];
2783 debugMsg( "_EdgesOnShape::Normal() failed for face "<<face->GetID()
2784 << " on _shape #" << _shapeID );
2790 //================================================================================
2792 * \brief Set data of _LayerEdge needed for smoothing
2793 * \param subIds - ids of sub-shapes of a SOLID to take into account faces from
2795 //================================================================================
2797 bool _ViscousBuilder::setEdgeData(_LayerEdge& edge,
2799 const set<TGeomID>& subIds,
2800 SMESH_MesherHelper& helper,
2803 const SMDS_MeshNode* node = edge._nodes[0]; // source node
2807 edge._curvature = 0;
2809 // --------------------------
2810 // Compute _normal and _cosin
2811 // --------------------------
2814 edge._normal.SetCoord(0,0,0);
2816 int totalNbFaces = 0;
2818 std::pair< TopoDS_Face, gp_XYZ > face2Norm[20];
2822 const bool onShrinkShape = !eos._sWOL.IsNull();
2823 const bool useGeometry = (( eos._hyp.UseSurfaceNormal() ) ||
2824 ( eos.ShapeType() != TopAbs_FACE && !onShrinkShape ));
2826 // get geom FACEs the node lies on
2827 //if ( useGeometry )
2829 set<TGeomID> faceIds;
2830 if ( eos.ShapeType() == TopAbs_FACE )
2832 faceIds.insert( eos._shapeID );
2836 SMDS_ElemIteratorPtr fIt = node->GetInverseElementIterator(SMDSAbs_Face);
2837 while ( fIt->more() )
2838 faceIds.insert( fIt->next()->getshapeId() );
2840 set<TGeomID>::iterator id = faceIds.begin();
2841 for ( ; id != faceIds.end(); ++id )
2843 const TopoDS_Shape& s = getMeshDS()->IndexToShape( *id );
2844 if ( s.IsNull() || s.ShapeType() != TopAbs_FACE || !subIds.count( *id ))
2846 F = TopoDS::Face( s );
2847 face2Norm[ totalNbFaces ].first = F;
2855 if ( onShrinkShape ) // one of faces the node is on has no layers
2857 if ( eos.SWOLType() == TopAbs_EDGE )
2859 // inflate from VERTEX along EDGE
2860 edge._normal = getEdgeDir( TopoDS::Edge( eos._sWOL ), TopoDS::Vertex( eos._shape ));
2862 else if ( eos.ShapeType() == TopAbs_VERTEX )
2864 // inflate from VERTEX along FACE
2865 edge._normal = getFaceDir( TopoDS::Face( eos._sWOL ), TopoDS::Vertex( eos._shape ),
2866 node, helper, normOK, &edge._cosin);
2870 // inflate from EDGE along FACE
2871 edge._normal = getFaceDir( TopoDS::Face( eos._sWOL ), TopoDS::Edge( eos._shape ),
2872 node, helper, normOK);
2876 // layers are on all faces of SOLID the node is on
2880 for ( int iF = 0; iF < totalNbFaces; ++iF )
2882 F = TopoDS::Face( face2Norm[ iF ].first );
2883 geomNorm = getFaceNormal( node, F, helper, normOK );
2884 if ( !normOK ) continue;
2887 if ( helper.GetSubShapeOri( data._solid, F ) != TopAbs_REVERSED )
2889 face2Norm[ iF ].second = geomNorm.XYZ();
2890 edge._normal += geomNorm.XYZ();
2892 if ( nbOkNorms == 0 )
2893 return error(SMESH_Comment("Can't get normal to node ") << node->GetID(), data._index);
2895 if ( edge._normal.Modulus() < 1e-3 && nbOkNorms > 1 )
2897 // opposite normals, re-get normals at shifted positions (IPAL 52426)
2898 edge._normal.SetCoord( 0,0,0 );
2899 for ( int iF = 0; iF < totalNbFaces; ++iF )
2901 const TopoDS_Face& F = face2Norm[iF].first;
2902 geomNorm = getFaceNormal( node, F, helper, normOK, /*shiftInside=*/true );
2903 if ( helper.GetSubShapeOri( data._solid, F ) != TopAbs_REVERSED )
2906 face2Norm[ iF ].second = geomNorm.XYZ();
2907 edge._normal += face2Norm[ iF ].second;
2911 if ( totalNbFaces < 3 )
2913 //edge._normal /= totalNbFaces;
2917 edge._normal = getWeigthedNormal( node, face2Norm, totalNbFaces );
2921 else // !useGeometry - get _normal using surrounding mesh faces
2923 set<TGeomID> faceIds;
2925 SMDS_ElemIteratorPtr fIt = node->GetInverseElementIterator(SMDSAbs_Face);
2926 while ( fIt->more() )
2928 const SMDS_MeshElement* face = fIt->next();
2929 if ( eos.GetNormal( face, geomNorm ))
2931 if ( onShrinkShape && !faceIds.insert( face->getshapeId() ).second )
2932 continue; // use only one mesh face on FACE
2933 edge._normal += geomNorm.XYZ();
2940 //if ( eos._hyp.UseSurfaceNormal() )
2942 switch ( eos.ShapeType() )
2949 TopoDS_Edge E = TopoDS::Edge( eos._shape );
2950 gp_Vec inFaceDir = getFaceDir( F, E, node, helper, normOK );
2951 double angle = inFaceDir.Angle( edge._normal ); // [0,PI]
2952 edge._cosin = Cos( angle );
2953 //cout << "Cosin on EDGE " << edge._cosin << " node " << node->GetID() << endl;
2956 case TopAbs_VERTEX: {
2957 if ( eos.SWOLType() != TopAbs_FACE ) { // else _cosin is set by getFaceDir()
2958 TopoDS_Vertex V = TopoDS::Vertex( eos._shape );
2959 gp_Vec inFaceDir = getFaceDir( F, V, node, helper, normOK );
2960 double angle = inFaceDir.Angle( edge._normal ); // [0,PI]
2961 edge._cosin = Cos( angle );
2962 if ( totalNbFaces > 2 || helper.IsSeamShape( node->getshapeId() ))
2963 for ( int iF = totalNbFaces-2; iF >=0; --iF )
2965 F = face2Norm[ iF ].first;
2966 inFaceDir = getFaceDir( F, V, node, helper, normOK=true );
2968 double angle = inFaceDir.Angle( edge._normal );
2969 edge._cosin = Max( edge._cosin, Cos( angle ));
2973 //cout << "Cosin on VERTEX " << edge._cosin << " node " << node->GetID() << endl;
2977 return error(SMESH_Comment("Invalid shape position of node ")<<node, data._index);
2981 double normSize = edge._normal.SquareModulus();
2982 if ( normSize < numeric_limits<double>::min() )
2983 return error(SMESH_Comment("Bad normal at node ")<< node->GetID(), data._index );
2985 edge._normal /= sqrt( normSize );
2987 // TODO: if ( !normOK ) then get normal by mesh faces
2989 // Set the rest data
2990 // --------------------
2991 if ( onShrinkShape )
2993 SMDS_MeshNode* tgtNode = const_cast<SMDS_MeshNode*>( edge._nodes.back() );
2994 if ( SMESHDS_SubMesh* sm = getMeshDS()->MeshElements( data._solid ))
2995 sm->RemoveNode( tgtNode , /*isNodeDeleted=*/false );
2997 // set initial position which is parameters on _sWOL in this case
2998 if ( eos.SWOLType() == TopAbs_EDGE )
3000 double u = helper.GetNodeU( TopoDS::Edge( eos._sWOL ), node, 0, &normOK );
3001 edge._pos.push_back( gp_XYZ( u, 0, 0 ));
3002 if ( edge._nodes.size() > 1 )
3003 getMeshDS()->SetNodeOnEdge( tgtNode, TopoDS::Edge( eos._sWOL ), u );
3007 gp_XY uv = helper.GetNodeUV( TopoDS::Face( eos._sWOL ), node, 0, &normOK );
3008 edge._pos.push_back( gp_XYZ( uv.X(), uv.Y(), 0));
3009 if ( edge._nodes.size() > 1 )
3010 getMeshDS()->SetNodeOnFace( tgtNode, TopoDS::Face( eos._sWOL ), uv.X(), uv.Y() );
3015 edge._pos.push_back( SMESH_TNodeXYZ( node ));
3017 if ( eos.ShapeType() == TopAbs_FACE )
3019 _Simplex::GetSimplices( node, edge._simplices, data._ignoreFaceIds, &data );
3023 // Set neighbour nodes for a _LayerEdge based on EDGE
3025 if ( eos.ShapeType() == TopAbs_EDGE /*||
3026 ( onShrinkShape && posType == SMDS_TOP_VERTEX && fabs( edge._cosin ) < 1e-10 )*/)
3028 edge._2neibors = new _2NearEdges;
3029 // target node instead of source ones will be set later
3030 // if ( ! findNeiborsOnEdge( &edge,
3031 // edge._2neibors->_nodes[0],
3032 // edge._2neibors->_nodes[1], eos,
3035 // edge.SetDataByNeighbors( edge._2neibors->_nodes[0],
3036 // edge._2neibors->_nodes[1],
3040 edge.SetCosin( edge._cosin ); // to update edge._lenFactor
3045 //================================================================================
3047 * \brief Return normal to a FACE at a node
3048 * \param [in] n - node
3049 * \param [in] face - FACE
3050 * \param [in] helper - helper
3051 * \param [out] isOK - true or false
3052 * \param [in] shiftInside - to find normal at a position shifted inside the face
3053 * \return gp_XYZ - normal
3055 //================================================================================
3057 gp_XYZ _ViscousBuilder::getFaceNormal(const SMDS_MeshNode* node,
3058 const TopoDS_Face& face,
3059 SMESH_MesherHelper& helper,
3066 // get a shifted position
3067 gp_Pnt p = SMESH_TNodeXYZ( node );
3068 gp_XYZ shift( 0,0,0 );
3069 TopoDS_Shape S = helper.GetSubShapeByNode( node, helper.GetMeshDS() );
3070 switch ( S.ShapeType() ) {
3073 shift = getFaceDir( face, TopoDS::Vertex( S ), node, helper, isOK );
3078 shift = getFaceDir( face, TopoDS::Edge( S ), node, helper, isOK );
3086 p.Translate( shift * 1e-5 );
3088 TopLoc_Location loc;
3089 GeomAPI_ProjectPointOnSurf& projector = helper.GetProjector( face, loc, 1e-7 );
3091 if ( !loc.IsIdentity() ) p.Transform( loc.Transformation().Inverted() );
3093 projector.Perform( p );
3094 if ( !projector.IsDone() || projector.NbPoints() < 1 )
3099 Quantity_Parameter U,V;
3100 projector.LowerDistanceParameters(U,V);
3105 uv = helper.GetNodeUV( face, node, 0, &isOK );
3111 Handle(Geom_Surface) surface = BRep_Tool::Surface( face );
3113 if ( !shiftInside &&
3114 helper.IsDegenShape( node->getshapeId() ) &&
3115 getFaceNormalAtSingularity( uv, face, helper, normal ))
3118 return normal.XYZ();
3121 int pointKind = GeomLib::NormEstim( surface, uv, 1e-5, normal );
3122 enum { REGULAR = 0, QUASYSINGULAR, CONICAL, IMPOSSIBLE };
3124 if ( pointKind == IMPOSSIBLE &&
3125 node->GetPosition()->GetDim() == 2 ) // node inside the FACE
3127 // probably NormEstim() failed due to a too high tolerance
3128 pointKind = GeomLib::NormEstim( surface, uv, 1e-20, normal );
3129 isOK = ( pointKind < IMPOSSIBLE );
3131 if ( pointKind < IMPOSSIBLE )
3133 if ( pointKind != REGULAR &&
3135 node->GetPosition()->GetDim() < 2 ) // FACE boundary
3137 gp_XYZ normShift = getFaceNormal( node, face, helper, isOK, /*shiftInside=*/true );
3138 if ( normShift * normal.XYZ() < 0. )
3144 if ( !isOK ) // hard singularity, to call with shiftInside=true ?
3146 const TGeomID faceID = helper.GetMeshDS()->ShapeToIndex( face );
3148 SMDS_ElemIteratorPtr fIt = node->GetInverseElementIterator(SMDSAbs_Face);
3149 while ( fIt->more() )
3151 const SMDS_MeshElement* f = fIt->next();
3152 if ( f->getshapeId() == faceID )
3154 isOK = SMESH_MeshAlgos::FaceNormal( f, (gp_XYZ&) normal.XYZ(), /*normalized=*/true );
3157 TopoDS_Face ff = face;
3158 ff.Orientation( TopAbs_FORWARD );
3159 if ( helper.IsReversedSubMesh( ff ))
3166 return normal.XYZ();
3169 //================================================================================
3171 * \brief Try to get normal at a singularity of a surface basing on it's nature
3173 //================================================================================
3175 bool _ViscousBuilder::getFaceNormalAtSingularity( const gp_XY& uv,
3176 const TopoDS_Face& face,
3177 SMESH_MesherHelper& helper,
3180 BRepAdaptor_Surface surface( face );
3182 if ( !getRovolutionAxis( surface, axis ))
3185 double f,l, d, du, dv;
3186 f = surface.FirstUParameter();
3187 l = surface.LastUParameter();
3188 d = ( uv.X() - f ) / ( l - f );
3189 du = ( d < 0.5 ? +1. : -1 ) * 1e-5 * ( l - f );
3190 f = surface.FirstVParameter();
3191 l = surface.LastVParameter();
3192 d = ( uv.Y() - f ) / ( l - f );
3193 dv = ( d < 0.5 ? +1. : -1 ) * 1e-5 * ( l - f );
3196 gp_Pnt2d testUV = uv;
3197 enum { REGULAR = 0, QUASYSINGULAR, CONICAL, IMPOSSIBLE };
3199 Handle(Geom_Surface) geomsurf = surface.Surface().Surface();
3200 for ( int iLoop = 0; true ; ++iLoop )
3202 testUV.SetCoord( testUV.X() + du, testUV.Y() + dv );
3203 if ( GeomLib::NormEstim( geomsurf, testUV, tol, refDir ) == REGULAR )
3210 if ( axis * refDir < 0. )
3218 //================================================================================
3220 * \brief Return a normal at a node weighted with angles taken by FACEs
3221 * \param [in] n - the node
3222 * \param [in] fId2Normal - FACE ids and normals
3223 * \param [in] nbFaces - nb of FACEs meeting at the node
3224 * \return gp_XYZ - computed normal
3226 //================================================================================
3228 gp_XYZ _ViscousBuilder::getWeigthedNormal( const SMDS_MeshNode* n,
3229 std::pair< TopoDS_Face, gp_XYZ > fId2Normal[],
3232 gp_XYZ resNorm(0,0,0);
3233 TopoDS_Shape V = SMESH_MesherHelper::GetSubShapeByNode( n, getMeshDS() );
3234 if ( V.ShapeType() != TopAbs_VERTEX )
3236 for ( int i = 0; i < nbFaces; ++i )
3237 resNorm += fId2Normal[i].second;
3241 // exclude equal normals
3242 //int nbUniqNorms = nbFaces;
3243 for ( int i = 0; i < nbFaces; ++i )
3244 for ( int j = i+1; j < nbFaces; ++j )
3245 if ( fId2Normal[i].second.IsEqual( fId2Normal[j].second, 0.1 ))
3247 fId2Normal[i].second.SetCoord( 0,0,0 );
3251 //if ( nbUniqNorms < 3 )
3253 for ( int i = 0; i < nbFaces; ++i )
3254 resNorm += fId2Normal[i].second;
3259 for ( int i = 0; i < nbFaces; ++i )
3261 const TopoDS_Face& F = fId2Normal[i].first;
3263 // look for two EDGEs shared by F and other FACEs within fId2Normal
3266 PShapeIteratorPtr eIt = SMESH_MesherHelper::GetAncestors( V, *_mesh, TopAbs_EDGE );
3267 while ( const TopoDS_Shape* E = eIt->next() )
3269 if ( !SMESH_MesherHelper::IsSubShape( *E, F ))
3271 bool isSharedEdge = false;
3272 for ( int j = 0; j < nbFaces && !isSharedEdge; ++j )
3274 if ( i == j ) continue;
3275 const TopoDS_Shape& otherF = fId2Normal[j].first;
3276 isSharedEdge = SMESH_MesherHelper::IsSubShape( *E, otherF );
3278 if ( !isSharedEdge )
3280 ee[ nbE ] = TopoDS::Edge( *E );
3281 ee[ nbE ].Orientation( SMESH_MesherHelper::GetSubShapeOri( F, *E ));
3286 // get an angle between the two EDGEs
3288 if ( nbE < 1 ) continue;
3295 if ( !V.IsSame( SMESH_MesherHelper::IthVertex( 0, ee[ 1 ] )))
3296 std::swap( ee[0], ee[1] );
3298 angles[i] = SMESH_MesherHelper::GetAngle( ee[0], ee[1], F, TopoDS::Vertex( V ));
3301 // compute a weighted normal
3302 double sumAngle = 0;
3303 for ( int i = 0; i < nbFaces; ++i )
3305 angles[i] = ( angles[i] > 2*M_PI ) ? 0 : M_PI - angles[i];
3306 sumAngle += angles[i];
3308 for ( int i = 0; i < nbFaces; ++i )
3309 resNorm += angles[i] / sumAngle * fId2Normal[i].second;
3314 //================================================================================
3316 * \brief Find 2 neigbor nodes of a node on EDGE
3318 //================================================================================
3320 bool _ViscousBuilder::findNeiborsOnEdge(const _LayerEdge* edge,
3321 const SMDS_MeshNode*& n1,
3322 const SMDS_MeshNode*& n2,
3326 const SMDS_MeshNode* node = edge->_nodes[0];
3327 const int shapeInd = eos._shapeID;
3328 SMESHDS_SubMesh* edgeSM = 0;
3329 if ( eos.ShapeType() == TopAbs_EDGE )
3331 edgeSM = eos._subMesh->GetSubMeshDS();
3332 if ( !edgeSM || edgeSM->NbElements() == 0 )
3333 return error(SMESH_Comment("Not meshed EDGE ") << shapeInd, data._index);
3337 SMDS_ElemIteratorPtr eIt = node->GetInverseElementIterator(SMDSAbs_Edge);
3338 while ( eIt->more() && !n2 )
3340 const SMDS_MeshElement* e = eIt->next();
3341 const SMDS_MeshNode* nNeibor = e->GetNode( 0 );
3342 if ( nNeibor == node ) nNeibor = e->GetNode( 1 );
3345 if (!edgeSM->Contains(e)) continue;
3349 TopoDS_Shape s = SMESH_MesherHelper::GetSubShapeByNode( nNeibor, getMeshDS() );
3350 if ( !SMESH_MesherHelper::IsSubShape( s, eos._sWOL )) continue;
3352 ( iN++ ? n2 : n1 ) = nNeibor;
3355 return error(SMESH_Comment("Wrongly meshed EDGE ") << shapeInd, data._index);
3359 //================================================================================
3361 * \brief Set _curvature and _2neibors->_plnNorm by 2 neigbor nodes residing the same EDGE
3363 //================================================================================
3365 void _LayerEdge::SetDataByNeighbors( const SMDS_MeshNode* n1,
3366 const SMDS_MeshNode* n2,
3367 const _EdgesOnShape& eos,
3368 SMESH_MesherHelper& helper)
3370 if ( eos.ShapeType() != TopAbs_EDGE )
3373 gp_XYZ pos = SMESH_TNodeXYZ( _nodes[0] );
3374 gp_XYZ vec1 = pos - SMESH_TNodeXYZ( n1 );
3375 gp_XYZ vec2 = pos - SMESH_TNodeXYZ( n2 );
3379 double sumLen = vec1.Modulus() + vec2.Modulus();
3380 _2neibors->_wgt[0] = 1 - vec1.Modulus() / sumLen;
3381 _2neibors->_wgt[1] = 1 - vec2.Modulus() / sumLen;
3382 double avgNormProj = 0.5 * ( _normal * vec1 + _normal * vec2 );
3383 double avgLen = 0.5 * ( vec1.Modulus() + vec2.Modulus() );
3384 if ( _curvature ) delete _curvature;
3385 _curvature = _Curvature::New( avgNormProj, avgLen );
3386 // if ( _curvature )
3387 // debugMsg( _nodes[0]->GetID()
3388 // << " CURV r,k: " << _curvature->_r<<","<<_curvature->_k
3389 // << " proj = "<<avgNormProj<< " len = " << avgLen << "| lenDelta(0) = "
3390 // << _curvature->lenDelta(0) );
3394 if ( eos._sWOL.IsNull() )
3396 TopoDS_Edge E = TopoDS::Edge( eos._shape );
3397 // if ( SMESH_Algo::isDegenerated( E ))
3399 gp_XYZ dirE = getEdgeDir( E, _nodes[0], helper );
3400 gp_XYZ plnNorm = dirE ^ _normal;
3401 double proj0 = plnNorm * vec1;
3402 double proj1 = plnNorm * vec2;
3403 if ( fabs( proj0 ) > 1e-10 || fabs( proj1 ) > 1e-10 )
3405 if ( _2neibors->_plnNorm ) delete _2neibors->_plnNorm;
3406 _2neibors->_plnNorm = new gp_XYZ( plnNorm.Normalized() );
3411 //================================================================================
3413 * \brief Copy data from a _LayerEdge of other SOLID and based on the same node;
3414 * this and other _LayerEdge's are inflated along a FACE or an EDGE
3416 //================================================================================
3418 gp_XYZ _LayerEdge::Copy( _LayerEdge& other,
3420 SMESH_MesherHelper& helper )
3422 _nodes = other._nodes;
3423 _normal = other._normal;
3425 _lenFactor = other._lenFactor;
3426 _cosin = other._cosin;
3427 _2neibors = other._2neibors;
3428 _curvature = 0; std::swap( _curvature, other._curvature );
3429 _2neibors = 0; std::swap( _2neibors, other._2neibors );
3431 gp_XYZ lastPos( 0,0,0 );
3432 if ( eos.SWOLType() == TopAbs_EDGE )
3434 double u = helper.GetNodeU( TopoDS::Edge( eos._sWOL ), _nodes[0] );
3435 _pos.push_back( gp_XYZ( u, 0, 0));
3437 u = helper.GetNodeU( TopoDS::Edge( eos._sWOL ), _nodes.back() );
3442 gp_XY uv = helper.GetNodeUV( TopoDS::Face( eos._sWOL ), _nodes[0]);
3443 _pos.push_back( gp_XYZ( uv.X(), uv.Y(), 0));
3445 uv = helper.GetNodeUV( TopoDS::Face( eos._sWOL ), _nodes.back() );
3446 lastPos.SetX( uv.X() );
3447 lastPos.SetY( uv.Y() );
3452 //================================================================================
3454 * \brief Set _cosin and _lenFactor
3456 //================================================================================
3458 void _LayerEdge::SetCosin( double cosin )
3461 cosin = Abs( _cosin );
3462 _lenFactor = ( /*0.1 < cosin &&*/ cosin < 1-1e-12 ) ? 1./sqrt(1-cosin*cosin) : 1.0;
3465 //================================================================================
3467 * \brief Fills a vector<_Simplex >
3469 //================================================================================
3471 void _Simplex::GetSimplices( const SMDS_MeshNode* node,
3472 vector<_Simplex>& simplices,
3473 const set<TGeomID>& ingnoreShapes,
3474 const _SolidData* dataToCheckOri,
3478 SMDS_ElemIteratorPtr fIt = node->GetInverseElementIterator(SMDSAbs_Face);
3479 while ( fIt->more() )
3481 const SMDS_MeshElement* f = fIt->next();
3482 const TGeomID shapeInd = f->getshapeId();
3483 if ( ingnoreShapes.count( shapeInd )) continue;
3484 const int nbNodes = f->NbCornerNodes();
3485 const int srcInd = f->GetNodeIndex( node );
3486 const SMDS_MeshNode* nPrev = f->GetNode( SMESH_MesherHelper::WrapIndex( srcInd-1, nbNodes ));
3487 const SMDS_MeshNode* nNext = f->GetNode( SMESH_MesherHelper::WrapIndex( srcInd+1, nbNodes ));
3488 const SMDS_MeshNode* nOpp = f->GetNode( SMESH_MesherHelper::WrapIndex( srcInd+2, nbNodes ));
3489 if ( dataToCheckOri && dataToCheckOri->_reversedFaceIds.count( shapeInd ))
3490 std::swap( nPrev, nNext );
3491 simplices.push_back( _Simplex( nPrev, nNext, nOpp ));
3495 SortSimplices( simplices );
3498 //================================================================================
3500 * \brief Set neighbor simplices side by side
3502 //================================================================================
3504 void _Simplex::SortSimplices(vector<_Simplex>& simplices)
3506 vector<_Simplex> sortedSimplices( simplices.size() );
3507 sortedSimplices[0] = simplices[0];
3509 for ( size_t i = 1; i < simplices.size(); ++i )
3511 for ( size_t j = 1; j < simplices.size(); ++j )
3512 if ( sortedSimplices[i-1]._nNext == simplices[j]._nPrev )
3514 sortedSimplices[i] = simplices[j];
3519 if ( nbFound == simplices.size() - 1 )
3520 simplices.swap( sortedSimplices );
3523 //================================================================================
3525 * \brief DEBUG. Create groups contating temorary data of _LayerEdge's
3527 //================================================================================
3529 void _ViscousBuilder::makeGroupOfLE()
3532 for ( size_t i = 0 ; i < _sdVec.size(); ++i )
3534 if ( _sdVec[i]._n2eMap.empty() ) continue;
3536 dumpFunction( SMESH_Comment("make_LayerEdge_") << i );
3537 TNode2Edge::iterator n2e;
3538 for ( n2e = _sdVec[i]._n2eMap.begin(); n2e != _sdVec[i]._n2eMap.end(); ++n2e )
3540 _LayerEdge* le = n2e->second;
3541 for ( size_t iN = 1; iN < le->_nodes.size(); ++iN )
3542 dumpCmd(SMESH_Comment("mesh.AddEdge([ ") <<le->_nodes[iN-1]->GetID()
3543 << ", " << le->_nodes[iN]->GetID() <<"])");
3547 dumpFunction( SMESH_Comment("makeNormals") << i );
3548 for ( n2e = _sdVec[i]._n2eMap.begin(); n2e != _sdVec[i]._n2eMap.end(); ++n2e )
3550 _LayerEdge* edge = n2e->second;
3551 SMESH_TNodeXYZ nXYZ( edge->_nodes[0] );
3552 nXYZ += edge->_normal * _sdVec[i]._stepSize;
3553 dumpCmd(SMESH_Comment("mesh.AddEdge([ ") << edge->_nodes[0]->GetID()
3554 << ", mesh.AddNode( " << nXYZ.X()<<","<< nXYZ.Y()<<","<< nXYZ.Z()<<")])");
3558 dumpFunction( SMESH_Comment("makeTmpFaces_") << i );
3559 dumpCmd( "faceId1 = mesh.NbElements()" );
3560 TopExp_Explorer fExp( _sdVec[i]._solid, TopAbs_FACE );
3561 for ( ; fExp.More(); fExp.Next() )
3563 if (const SMESHDS_SubMesh* sm = _sdVec[i]._proxyMesh->GetProxySubMesh( fExp.Current()))
3565 if ( sm->NbElements() == 0 ) continue;
3566 SMDS_ElemIteratorPtr fIt = sm->GetElements();
3567 while ( fIt->more())
3569 const SMDS_MeshElement* e = fIt->next();
3570 SMESH_Comment cmd("mesh.AddFace([");
3571 for ( int j=0; j < e->NbCornerNodes(); ++j )
3572 cmd << e->GetNode(j)->GetID() << (j+1<e->NbCornerNodes() ? ",": "])");
3577 dumpCmd( "faceId2 = mesh.NbElements()" );
3578 dumpCmd( SMESH_Comment( "mesh.MakeGroup( 'tmpFaces_" ) << i << "',"
3579 << "SMESH.FACE, SMESH.FT_RangeOfIds,'=',"
3580 << "'%s-%s' % (faceId1+1, faceId2))");
3586 //================================================================================
3588 * \brief Find maximal _LayerEdge length (layer thickness) limited by geometry
3590 //================================================================================
3592 void _ViscousBuilder::computeGeomSize( _SolidData& data )
3594 data._geomSize = Precision::Infinite();
3595 double intersecDist;
3596 auto_ptr<SMESH_ElementSearcher> searcher
3597 ( SMESH_MeshAlgos::GetElementSearcher( *getMeshDS(),
3598 data._proxyMesh->GetFaces( data._solid )) );
3600 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
3602 _EdgesOnShape& eos = data._edgesOnShape[ iS ];
3603 if ( eos._edges.empty() || eos.ShapeType() == TopAbs_EDGE )
3605 for ( size_t i = 0; i < eos._edges.size(); ++i )
3607 eos._edges[i]->FindIntersection( *searcher, intersecDist, data._epsilon, eos );
3608 if ( data._geomSize > intersecDist && intersecDist > 0 )
3609 data._geomSize = intersecDist;
3614 //================================================================================
3616 * \brief Increase length of _LayerEdge's to reach the required thickness of layers
3618 //================================================================================
3620 bool _ViscousBuilder::inflate(_SolidData& data)
3622 SMESH_MesherHelper helper( *_mesh );
3624 // Limit inflation step size by geometry size found by itersecting
3625 // normals of _LayerEdge's with mesh faces
3626 if ( data._stepSize > 0.3 * data._geomSize )
3627 limitStepSize( data, 0.3 * data._geomSize );
3629 const double tgtThick = data._maxThickness;
3630 if ( data._stepSize > data._minThickness )
3631 limitStepSize( data, data._minThickness );
3633 if ( data._stepSize < 1. )
3634 data._epsilon = data._stepSize * 1e-7;
3636 debugMsg( "-- geomSize = " << data._geomSize << ", stepSize = " << data._stepSize );
3638 const double safeFactor = ( 2*data._maxThickness < data._geomSize ) ? 1 : theThickToIntersection;
3640 double avgThick = 0, curThick = 0, distToIntersection = Precision::Infinite();
3641 int nbSteps = 0, nbRepeats = 0;
3642 while ( avgThick < 0.99 )
3644 // new target length
3645 curThick += data._stepSize;
3646 if ( curThick > tgtThick )
3648 curThick = tgtThick + tgtThick*( 1.-avgThick ) * nbRepeats;
3652 // Elongate _LayerEdge's
3653 dumpFunction(SMESH_Comment("inflate")<<data._index<<"_step"<<nbSteps); // debug
3654 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
3656 _EdgesOnShape& eos = data._edgesOnShape[iS];
3657 if ( eos._edges.empty() ) continue;
3659 const double shapeCurThick = Min( curThick, eos._hyp.GetTotalThickness() );
3660 for ( size_t i = 0; i < eos._edges.size(); ++i )
3662 eos._edges[i]->SetNewLength( shapeCurThick, eos, helper );
3667 if ( !updateNormals( data, helper, nbSteps ))
3670 // Improve and check quality
3671 if ( !smoothAndCheck( data, nbSteps, distToIntersection ))
3675 #ifdef __NOT_INVALIDATE_BAD_SMOOTH
3676 debugMsg("NOT INVALIDATED STEP!");
3677 return error("Smoothing failed", data._index);
3679 dumpFunction(SMESH_Comment("invalidate")<<data._index<<"_step"<<nbSteps); // debug
3680 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
3682 _EdgesOnShape& eos = data._edgesOnShape[iS];
3683 for ( size_t i = 0; i < eos._edges.size(); ++i )
3684 eos._edges[i]->InvalidateStep( nbSteps+1, eos );
3688 break; // no more inflating possible
3692 // Evaluate achieved thickness
3694 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
3696 _EdgesOnShape& eos = data._edgesOnShape[iS];
3697 if ( eos._edges.empty() ) continue;
3699 const double shapeTgtThick = eos._hyp.GetTotalThickness();
3700 for ( size_t i = 0; i < eos._edges.size(); ++i )
3702 avgThick += Min( 1., eos._edges[i]->_len / shapeTgtThick );
3705 avgThick /= data._n2eMap.size();
3706 debugMsg( "-- Thickness " << curThick << " ("<< avgThick*100 << "%) reached" );
3708 if ( distToIntersection < tgtThick * avgThick * safeFactor && avgThick < 0.9 )
3710 debugMsg( "-- Stop inflation since "
3711 << " distToIntersection( "<<distToIntersection<<" ) < avgThick( "
3712 << tgtThick * avgThick << " ) * " << safeFactor );
3716 limitStepSize( data, 0.25 * distToIntersection );
3717 if ( data._stepSizeNodes[0] )
3718 data._stepSize = data._stepSizeCoeff *
3719 SMESH_TNodeXYZ(data._stepSizeNodes[0]).Distance(data._stepSizeNodes[1]);
3721 } // while ( avgThick < 0.99 )
3724 return error("failed at the very first inflation step", data._index);
3726 if ( avgThick < 0.99 )
3728 if ( !data._proxyMesh->_warning || data._proxyMesh->_warning->IsOK() )
3730 data._proxyMesh->_warning.reset
3731 ( new SMESH_ComputeError (COMPERR_WARNING,
3732 SMESH_Comment("Thickness ") << tgtThick <<
3733 " of viscous layers not reached,"
3734 " average reached thickness is " << avgThick*tgtThick));
3738 // Restore position of src nodes moved by infaltion on _noShrinkShapes
3739 dumpFunction(SMESH_Comment("restoNoShrink_So")<<data._index); // debug
3740 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
3742 _EdgesOnShape& eos = data._edgesOnShape[iS];
3743 if ( !eos._edges.empty() && eos._edges[0]->_nodes.size() == 1 )
3744 for ( size_t i = 0; i < eos._edges.size(); ++i )
3746 restoreNoShrink( *eos._edges[ i ] );
3754 //================================================================================
3756 * \brief Improve quality of layer inner surface and check intersection
3758 //================================================================================
3760 bool _ViscousBuilder::smoothAndCheck(_SolidData& data,
3762 double & distToIntersection)
3764 if ( data._nbShapesToSmooth == 0 )
3765 return true; // no shapes needing smoothing
3767 bool moved, improved;
3768 vector< _LayerEdge* > badSmooEdges;
3770 SMESH_MesherHelper helper(*_mesh);
3771 Handle(Geom_Surface) surface;
3774 for ( int isFace = 0; isFace < 2; ++isFace ) // smooth on [ EDGEs, FACEs ]
3776 const TopAbs_ShapeEnum shapeType = isFace ? TopAbs_FACE : TopAbs_EDGE;
3778 for ( int iS = 0; iS < data._edgesOnShape.size(); ++iS )
3780 _EdgesOnShape& eos = data._edgesOnShape[ iS ];
3781 if ( !eos._toSmooth || eos.ShapeType() != shapeType )
3784 // already smoothed?
3785 bool toSmooth = ( eos._edges[ 0 ]->NbSteps() >= nbSteps+1 );
3786 if ( !toSmooth ) continue;
3788 if ( !eos._hyp.ToSmooth() )
3790 // smooth disabled by the user; check validy only
3791 if ( !isFace ) continue;
3793 for ( size_t i = 0; i < eos._edges.size(); ++i )
3795 _LayerEdge* edge = eos._edges[i];
3796 const gp_XYZ& curPos ( );
3797 for ( size_t iF = 0; iF < edge->_simplices.size(); ++iF )
3798 if ( !edge->_simplices[iF].IsForward( edge->_nodes[0],
3799 &edge->_pos.back(), vol ))
3802 continue; // goto to the next EDGE or FACE
3806 if ( eos.SWOLType() == TopAbs_FACE )
3808 if ( !F.IsSame( eos._sWOL )) {
3809 F = TopoDS::Face( eos._sWOL );
3810 helper.SetSubShape( F );
3811 surface = BRep_Tool::Surface( F );
3816 F.Nullify(); surface.Nullify();
3818 const TGeomID sInd = eos._shapeID;
3820 // perform smoothing
3822 if ( eos.ShapeType() == TopAbs_EDGE )
3824 dumpFunction(SMESH_Comment("smooth")<<data._index << "_Ed"<<sInd <<"_InfStep"<<nbSteps);
3826 // try a simple solution on an analytic EDGE
3827 if ( !smoothAnalyticEdge( data, eos, surface, F, helper ))
3833 for ( size_t i = 0; i < eos._edges.size(); ++i )
3835 moved |= eos._edges[i]->SmoothOnEdge( surface, F, helper );
3837 dumpCmd( SMESH_Comment("# end step ")<<step);
3839 while ( moved && step++ < 5 );
3847 const bool isConcaveFace = data._concaveFaces.count( sInd );
3849 int step = 0, stepLimit = 5, badNb = 0;
3850 while (( ++step <= stepLimit ) || improved )
3852 dumpFunction(SMESH_Comment("smooth")<<data._index<<"_Fa"<<sInd
3853 <<"_InfStep"<<nbSteps<<"_"<<step); // debug
3854 int oldBadNb = badNb;
3855 badSmooEdges.clear();
3858 for ( size_t i = 0; i < eos._edges.size(); ++i ) // iterate forward
3859 if ( eos._edges[i]->Smooth( step, isConcaveFace, false ))
3860 badSmooEdges.push_back( eos._edges[i] );
3864 for ( int i = eos._edges.size()-1; i >= 0; --i ) // iterate backward
3865 if ( eos._edges[i]->Smooth( step, isConcaveFace, false ))
3866 badSmooEdges.push_back( eos._edges[i] );
3868 badNb = badSmooEdges.size();
3869 improved = ( badNb < oldBadNb );
3871 if ( !badSmooEdges.empty() && step >= stepLimit / 2 )
3873 // look for the best smooth of _LayerEdge's neighboring badSmooEdges
3874 vector<_Simplex> simplices;
3875 for ( size_t i = 0; i < badSmooEdges.size(); ++i )
3877 _LayerEdge* ledge = badSmooEdges[i];
3878 _Simplex::GetSimplices( ledge->_nodes[0], simplices, data._ignoreFaceIds );
3879 for ( size_t iS = 0; iS < simplices.size(); ++iS )
3881 TNode2Edge::iterator n2e = data._n2eMap.find( simplices[iS]._nNext );
3882 if ( n2e != data._n2eMap.end()) {
3883 _LayerEdge* ledge2 = n2e->second;
3884 if ( ledge2->_nodes[0]->getshapeId() == sInd )
3885 ledge2->Smooth( step, isConcaveFace, /*findBest=*/true );
3890 // issue 22576 -- no bad faces but still there are intersections to fix
3891 // if ( improved && badNb == 0 )
3892 // stepLimit = step + 3;
3900 for ( int i = 0; i < eos._edges.size(); ++i )
3902 _LayerEdge* edge = eos._edges[i];
3903 SMESH_TNodeXYZ tgtXYZ( edge->_nodes.back() );
3904 for ( size_t j = 0; j < edge->_simplices.size(); ++j )
3905 if ( !edge->_simplices[j].IsForward( edge->_nodes[0], &tgtXYZ, vol ))
3907 cout << "Bad simplex ( " << edge->_nodes[0]->GetID()<< " "<< tgtXYZ._node->GetID()
3908 << " "<< edge->_simplices[j]._nPrev->GetID()
3909 << " "<< edge->_simplices[j]._nNext->GetID() << " )" << endl;
3916 } // // smooth on FACE's
3918 } // smooth on [ EDGEs, FACEs ]
3920 // Check orientation of simplices of _ConvexFace::_simplexTestEdges
3921 map< TGeomID, _ConvexFace >::iterator id2face = data._convexFaces.begin();
3922 for ( ; id2face != data._convexFaces.end(); ++id2face )
3924 _ConvexFace & convFace = (*id2face).second;
3925 if ( !convFace._simplexTestEdges.empty() &&
3926 convFace._simplexTestEdges[0]->_nodes[0]->GetPosition()->GetDim() == 2 )
3927 continue; // _simplexTestEdges are based on FACE -- already checked while smoothing
3929 if ( !convFace.CheckPrisms() )
3933 // Check if the last segments of _LayerEdge intersects 2D elements;
3934 // checked elements are either temporary faces or faces on surfaces w/o the layers
3936 auto_ptr<SMESH_ElementSearcher> searcher
3937 ( SMESH_MeshAlgos::GetElementSearcher( *getMeshDS(),
3938 data._proxyMesh->GetFaces( data._solid )) );
3940 distToIntersection = Precision::Infinite();
3942 const SMDS_MeshElement* intFace = 0;
3943 const SMDS_MeshElement* closestFace = 0;
3945 for ( int iS = 0; iS < data._edgesOnShape.size(); ++iS )
3947 _EdgesOnShape& eos = data._edgesOnShape[ iS ];
3948 if ( eos._edges.empty() || !eos._sWOL.IsNull() )
3950 for ( size_t i = 0; i < eos._edges.size(); ++i )
3952 if ( eos._edges[i]->FindIntersection( *searcher, dist, data._epsilon, eos, &intFace ))
3954 if ( distToIntersection > dist )
3956 // ignore intersection of a _LayerEdge based on a _ConvexFace with a face
3957 // lying on this _ConvexFace
3958 if ( _ConvexFace* convFace = data.GetConvexFace( intFace->getshapeId() ))
3959 if ( convFace->_subIdToEOS.count ( eos._shapeID ))
3962 // ignore intersection of a _LayerEdge based on a FACE with an element on this FACE
3963 // ( avoid limiting the thickness on the case of issue 22576)
3964 if ( intFace->getshapeId() == eos._shapeID )
3967 distToIntersection = dist;
3969 closestFace = intFace;
3976 SMDS_MeshElement::iterator nIt = closestFace->begin_nodes();
3977 cout << "Shortest distance: _LayerEdge nodes: tgt " << le->_nodes.back()->GetID()
3978 << " src " << le->_nodes[0]->GetID()<< ", intersection with face ("
3979 << (*nIt++)->GetID()<<" "<< (*nIt++)->GetID()<<" "<< (*nIt++)->GetID()
3980 << ") distance = " << distToIntersection<< endl;
3987 //================================================================================
3989 * \brief Return a curve of the EDGE to be used for smoothing and arrange
3990 * _LayerEdge's to be in a consequent order
3992 //================================================================================
3994 Handle(Geom_Curve) _SolidData::CurveForSmooth( const TopoDS_Edge& E,
3996 SMESH_MesherHelper& helper)
3998 const TGeomID eIndex = eos._shapeID;
4000 map< TGeomID, Handle(Geom_Curve)>::iterator i2curve = _edge2curve.find( eIndex );
4002 if ( i2curve == _edge2curve.end() )
4004 // sort _LayerEdge's by position on the EDGE
4005 SortOnEdge( E, eos._edges, helper );
4007 SMESHDS_SubMesh* smDS = eos._subMesh->GetSubMeshDS();
4009 TopLoc_Location loc; double f,l;
4011 Handle(Geom_Line) line;
4012 Handle(Geom_Circle) circle;
4013 bool isLine, isCirc;
4014 if ( eos._sWOL.IsNull() ) /////////////////////////////////////////// 3D case
4016 // check if the EDGE is a line
4017 Handle(Geom_Curve) curve = BRep_Tool::Curve( E, loc, f, l);
4018 if ( curve->IsKind( STANDARD_TYPE( Geom_TrimmedCurve )))
4019 curve = Handle(Geom_TrimmedCurve)::DownCast( curve )->BasisCurve();
4021 line = Handle(Geom_Line)::DownCast( curve );
4022 circle = Handle(Geom_Circle)::DownCast( curve );
4023 isLine = (!line.IsNull());
4024 isCirc = (!circle.IsNull());
4026 if ( !isLine && !isCirc ) // Check if the EDGE is close to a line
4029 // SMDS_NodeIteratorPtr nIt = smDS->GetNodes();
4030 // while ( nIt->more() )
4031 // bndBox.Add( SMESH_TNodeXYZ( nIt->next() ));
4032 // gp_XYZ size = bndBox.CornerMax() - bndBox.CornerMin();
4035 // if ( eos._edges.size() > 1 ) {
4036 // p0 = SMESH_TNodeXYZ( eos._edges[0]->_nodes[0] );
4037 // p1 = SMESH_TNodeXYZ( eos._edges[1]->_nodes[0] );
4040 // p0 = curve->Value( f );
4041 // p1 = curve->Value( l );
4043 // const double lineTol = 1e-2 * p0.Distance( p1 );
4044 // for ( int i = 0; i < 3 && !isLine; ++i )
4045 // isLine = ( size.Coord( i+1 ) <= lineTol ); ////////// <--- WRONG
4047 isLine = SMESH_Algo::IsStraight( E );
4050 line = new Geom_Line( gp::OX() ); // only type does matter
4052 if ( !isLine && !isCirc && eos._edges.size() > 2) // Check if the EDGE is close to a circle
4057 else //////////////////////////////////////////////////////////////////////// 2D case
4059 const TopoDS_Face& F = TopoDS::Face( eos._sWOL );
4061 // check if the EDGE is a line
4062 Handle(Geom2d_Curve) curve = BRep_Tool::CurveOnSurface( E, F, f, l);
4063 if ( curve->IsKind( STANDARD_TYPE( Geom2d_TrimmedCurve )))
4064 curve = Handle(Geom2d_TrimmedCurve)::DownCast( curve )->BasisCurve();
4066 Handle(Geom2d_Line) line2d = Handle(Geom2d_Line)::DownCast( curve );
4067 Handle(Geom2d_Circle) circle2d = Handle(Geom2d_Circle)::DownCast( curve );
4068 isLine = (!line2d.IsNull());
4069 isCirc = (!circle2d.IsNull());
4071 if ( !isLine && !isCirc) // Check if the EDGE is close to a line
4074 SMDS_NodeIteratorPtr nIt = smDS->GetNodes();
4075 while ( nIt->more() )
4076 bndBox.Add( helper.GetNodeUV( F, nIt->next() ));
4077 gp_XY size = bndBox.CornerMax() - bndBox.CornerMin();
4079 const double lineTol = 1e-2 * sqrt( bndBox.SquareExtent() );
4080 for ( int i = 0; i < 2 && !isLine; ++i )
4081 isLine = ( size.Coord( i+1 ) <= lineTol );
4083 if ( !isLine && !isCirc && eos._edges.size() > 2) // Check if the EDGE is close to a circle
4089 line = new Geom_Line( gp::OX() ); // only type does matter
4093 gp_Pnt2d p = circle2d->Location();
4094 gp_Ax2 ax( gp_Pnt( p.X(), p.Y(), 0), gp::DX());
4095 circle = new Geom_Circle( ax, 1.); // only center position does matter
4099 Handle(Geom_Curve)& res = _edge2curve[ eIndex ];
4107 return i2curve->second;
4110 //================================================================================
4112 * \brief Sort _LayerEdge's by a parameter on a given EDGE
4114 //================================================================================
4116 void _SolidData::SortOnEdge( const TopoDS_Edge& E,
4117 vector< _LayerEdge* >& edges,
4118 SMESH_MesherHelper& helper)
4120 map< double, _LayerEdge* > u2edge;
4121 for ( size_t i = 0; i < edges.size(); ++i )
4122 u2edge.insert( make_pair( helper.GetNodeU( E, edges[i]->_nodes[0] ), edges[i] ));
4124 ASSERT( u2edge.size() == edges.size() );
4125 map< double, _LayerEdge* >::iterator u2e = u2edge.begin();
4126 for ( int i = 0; i < edges.size(); ++i, ++u2e )
4127 edges[i] = u2e->second;
4129 Sort2NeiborsOnEdge( edges );
4132 //================================================================================
4134 * \brief Set _2neibors according to the order of _LayerEdge on EDGE
4136 //================================================================================
4138 void _SolidData::Sort2NeiborsOnEdge( vector< _LayerEdge* >& edges )
4140 for ( size_t i = 0; i < edges.size()-1; ++i )
4141 if ( edges[i]->_2neibors->tgtNode(1) != edges[i+1]->_nodes.back() )
4142 edges[i]->_2neibors->reverse();
4144 const size_t iLast = edges.size() - 1;
4145 if ( edges.size() > 1 &&
4146 edges[iLast]->_2neibors->tgtNode(0) != edges[iLast-1]->_nodes.back() )
4147 edges[iLast]->_2neibors->reverse();
4150 //================================================================================
4152 * \brief Return _EdgesOnShape* corresponding to the shape
4154 //================================================================================
4156 _EdgesOnShape* _SolidData::GetShapeEdges(const TGeomID shapeID )
4158 if ( shapeID < _edgesOnShape.size() &&
4159 _edgesOnShape[ shapeID ]._shapeID == shapeID )
4160 return & _edgesOnShape[ shapeID ];
4162 for ( size_t i = 0; i < _edgesOnShape.size(); ++i )
4163 if ( _edgesOnShape[i]._shapeID == shapeID )
4164 return & _edgesOnShape[i];
4169 //================================================================================
4171 * \brief Return _EdgesOnShape* corresponding to the shape
4173 //================================================================================
4175 _EdgesOnShape* _SolidData::GetShapeEdges(const TopoDS_Shape& shape )
4177 SMESHDS_Mesh* meshDS = _proxyMesh->GetMesh()->GetMeshDS();
4178 return GetShapeEdges( meshDS->ShapeToIndex( shape ));
4181 //================================================================================
4183 * \brief Prepare data of the _LayerEdge for smoothing on FACE
4185 //================================================================================
4187 void _SolidData::PrepareEdgesToSmoothOnFace( _EdgesOnShape* eof, bool substituteSrcNodes )
4189 set< TGeomID > vertices;
4190 SMESH_MesherHelper helper( *_proxyMesh->GetMesh() );
4191 if ( isConcave( TopoDS::Face( eof->_shape ), helper, &vertices ))
4192 _concaveFaces.insert( eof->_shapeID );
4194 for ( size_t i = 0; i < eof->_edges.size(); ++i )
4195 eof->_edges[i]->_smooFunction = 0;
4197 for ( size_t i = 0; i < eof->_edges.size(); ++i )
4199 _LayerEdge* edge = eof->_edges[i];
4200 _Simplex::GetSimplices
4201 ( edge->_nodes[0], edge->_simplices, _ignoreFaceIds, this, /*sort=*/true );
4203 edge->ChooseSmooFunction( vertices, _n2eMap );
4205 double avgNormProj = 0, avgLen = 0;
4206 for ( size_t i = 0; i < edge->_simplices.size(); ++i )
4208 _Simplex& s = edge->_simplices[i];
4210 gp_XYZ vec = edge->_pos.back() - SMESH_TNodeXYZ( s._nPrev );
4211 avgNormProj += edge->_normal * vec;
4212 avgLen += vec.Modulus();
4213 if ( substituteSrcNodes )
4215 s._nNext = _n2eMap[ s._nNext ]->_nodes.back();
4216 s._nPrev = _n2eMap[ s._nPrev ]->_nodes.back();
4219 avgNormProj /= edge->_simplices.size();
4220 avgLen /= edge->_simplices.size();
4221 edge->_curvature = _Curvature::New( avgNormProj, avgLen );
4225 //================================================================================
4227 * \brief Add faces for smoothing
4229 //================================================================================
4231 void _SolidData::AddShapesToSmooth( const set< _EdgesOnShape* >& eosSet )
4233 set< _EdgesOnShape * >::const_iterator eos = eosSet.begin();
4234 for ( ; eos != eosSet.end(); ++eos )
4236 if ( !*eos || (*eos)->_toSmooth ) continue;
4238 (*eos)->_toSmooth = true;
4240 if ( (*eos)->ShapeType() == TopAbs_FACE )
4242 PrepareEdgesToSmoothOnFace( *eos, /*substituteSrcNodes=*/true );
4247 //================================================================================
4249 * \brief smooth _LayerEdge's on a staight EDGE or circular EDGE
4251 //================================================================================
4253 bool _ViscousBuilder::smoothAnalyticEdge( _SolidData& data,
4255 Handle(Geom_Surface)& surface,
4256 const TopoDS_Face& F,
4257 SMESH_MesherHelper& helper)
4259 const TopoDS_Edge& E = TopoDS::Edge( eos._shape );
4261 Handle(Geom_Curve) curve = data.CurveForSmooth( E, eos, helper );
4262 if ( curve.IsNull() ) return false;
4264 const size_t iFrom = 0, iTo = eos._edges.size();
4266 // compute a relative length of segments
4267 vector< double > len( iTo-iFrom+1 );
4269 double curLen, prevLen = len[0] = 1.0;
4270 for ( int i = iFrom; i < iTo; ++i )
4272 curLen = prevLen * eos._edges[i]->_2neibors->_wgt[0] / eos._edges[i]->_2neibors->_wgt[1];
4273 len[i-iFrom+1] = len[i-iFrom] + curLen;
4278 if ( curve->IsKind( STANDARD_TYPE( Geom_Line )))
4280 if ( F.IsNull() ) // 3D
4282 SMESH_TNodeXYZ p0( eos._edges[iFrom]->_2neibors->tgtNode(0));
4283 SMESH_TNodeXYZ p1( eos._edges[iTo-1]->_2neibors->tgtNode(1));
4284 for ( int i = iFrom; i < iTo; ++i )
4286 double r = len[i-iFrom] / len.back();
4287 gp_XYZ newPos = p0 * ( 1. - r ) + p1 * r;
4288 eos._edges[i]->_pos.back() = newPos;
4289 SMDS_MeshNode* tgtNode = const_cast<SMDS_MeshNode*>( eos._edges[i]->_nodes.back() );
4290 tgtNode->setXYZ( newPos.X(), newPos.Y(), newPos.Z() );
4291 dumpMove( tgtNode );
4296 // gp_XY uv0 = helper.GetNodeUV( F, eos._edges[iFrom]->_2neibors->tgtNode(0));
4297 // gp_XY uv1 = helper.GetNodeUV( F, eos._edges[iTo-1]->_2neibors->tgtNode(1));
4298 _LayerEdge* e0 = eos._edges[iFrom]->_2neibors->_edges[0];
4299 _LayerEdge* e1 = eos._edges[iTo-1]->_2neibors->_edges[1];
4300 gp_XY uv0 = e0->LastUV( F, *data.GetShapeEdges( e0 ));
4301 gp_XY uv1 = e1->LastUV( F, *data.GetShapeEdges( e1 ));
4302 if ( eos._edges[iFrom]->_2neibors->tgtNode(0) ==
4303 eos._edges[iTo-1]->_2neibors->tgtNode(1) ) // closed edge
4305 int iPeriodic = helper.GetPeriodicIndex();
4306 if ( iPeriodic == 1 || iPeriodic == 2 )
4308 uv1.SetCoord( iPeriodic, helper.GetOtherParam( uv1.Coord( iPeriodic )));
4309 if ( uv0.Coord( iPeriodic ) > uv1.Coord( iPeriodic ))
4310 std::swap( uv0, uv1 );
4313 const gp_XY rangeUV = uv1 - uv0;
4314 for ( int i = iFrom; i < iTo; ++i )
4316 double r = len[i-iFrom] / len.back();
4317 gp_XY newUV = uv0 + r * rangeUV;
4318 eos._edges[i]->_pos.back().SetCoord( newUV.X(), newUV.Y(), 0 );
4320 gp_Pnt newPos = surface->Value( newUV.X(), newUV.Y() );
4321 SMDS_MeshNode* tgtNode = const_cast<SMDS_MeshNode*>( eos._edges[i]->_nodes.back() );
4322 tgtNode->setXYZ( newPos.X(), newPos.Y(), newPos.Z() );
4323 dumpMove( tgtNode );
4325 SMDS_FacePosition* pos = static_cast<SMDS_FacePosition*>( tgtNode->GetPosition() );
4326 pos->SetUParameter( newUV.X() );
4327 pos->SetVParameter( newUV.Y() );
4333 if ( curve->IsKind( STANDARD_TYPE( Geom_Circle )))
4335 Handle(Geom_Circle) circle = Handle(Geom_Circle)::DownCast( curve );
4336 gp_Pnt center3D = circle->Location();
4338 if ( F.IsNull() ) // 3D
4340 if ( eos._edges[iFrom]->_2neibors->tgtNode(0) ==
4341 eos._edges[iTo-1]->_2neibors->tgtNode(1) )
4342 return true; // closed EDGE - nothing to do
4344 return false; // TODO ???
4348 const gp_XY center( center3D.X(), center3D.Y() );
4350 _LayerEdge* e0 = eos._edges[iFrom]->_2neibors->_edges[0];
4351 _LayerEdge* eM = eos._edges[iFrom];
4352 _LayerEdge* e1 = eos._edges[iTo-1]->_2neibors->_edges[1];
4353 gp_XY uv0 = e0->LastUV( F, *data.GetShapeEdges( e0 ) );
4354 gp_XY uvM = eM->LastUV( F, *data.GetShapeEdges( eM ) );
4355 gp_XY uv1 = e1->LastUV( F, *data.GetShapeEdges( e1 ) );
4356 gp_Vec2d vec0( center, uv0 );
4357 gp_Vec2d vecM( center, uvM );
4358 gp_Vec2d vec1( center, uv1 );
4359 double uLast = vec0.Angle( vec1 ); // -PI - +PI
4360 double uMidl = vec0.Angle( vecM );
4361 if ( uLast * uMidl <= 0. )
4362 uLast += ( uMidl > 0 ? +2. : -2. ) * M_PI;
4363 const double radius = 0.5 * ( vec0.Magnitude() + vec1.Magnitude() );
4365 gp_Ax2d axis( center, vec0 );
4366 gp_Circ2d circ( axis, radius );
4367 for ( int i = iFrom; i < iTo; ++i )
4369 double newU = uLast * len[i-iFrom] / len.back();
4370 gp_Pnt2d newUV = ElCLib::Value( newU, circ );
4371 eos._edges[i]->_pos.back().SetCoord( newUV.X(), newUV.Y(), 0 );
4373 gp_Pnt newPos = surface->Value( newUV.X(), newUV.Y() );
4374 SMDS_MeshNode* tgtNode = const_cast<SMDS_MeshNode*>( eos._edges[i]->_nodes.back() );
4375 tgtNode->setXYZ( newPos.X(), newPos.Y(), newPos.Z() );
4376 dumpMove( tgtNode );
4378 SMDS_FacePosition* pos = static_cast<SMDS_FacePosition*>( tgtNode->GetPosition() );
4379 pos->SetUParameter( newUV.X() );
4380 pos->SetVParameter( newUV.Y() );
4389 //================================================================================
4391 * \brief Modify normals of _LayerEdge's on EDGE's to avoid intersection with
4392 * _LayerEdge's on neighbor EDGE's
4394 //================================================================================
4396 bool _ViscousBuilder::updateNormals( _SolidData& data,
4397 SMESH_MesherHelper& helper,
4401 return updateNormalsOfConvexFaces( data, helper, stepNb );
4403 // make temporary quadrangles got by extrusion of
4404 // mesh edges along _LayerEdge._normal's
4406 vector< const SMDS_MeshElement* > tmpFaces;
4408 set< SMESH_TLink > extrudedLinks; // contains target nodes
4409 vector< const SMDS_MeshNode*> nodes(4); // of a tmp mesh face
4411 dumpFunction(SMESH_Comment("makeTmpFacesOnEdges")<<data._index);
4412 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
4414 _EdgesOnShape& eos = data._edgesOnShape[ iS ];
4415 if ( eos.ShapeType() != TopAbs_EDGE || !eos._sWOL.IsNull() )
4417 for ( size_t i = 0; i < eos._edges.size(); ++i )
4419 _LayerEdge* edge = eos._edges[i];
4420 const SMDS_MeshNode* tgt1 = edge->_nodes.back();
4421 for ( int j = 0; j < 2; ++j ) // loop on _2NearEdges
4423 const SMDS_MeshNode* tgt2 = edge->_2neibors->tgtNode(j);
4424 pair< set< SMESH_TLink >::iterator, bool > link_isnew =
4425 extrudedLinks.insert( SMESH_TLink( tgt1, tgt2 ));
4426 if ( !link_isnew.second )
4428 extrudedLinks.erase( link_isnew.first );
4429 continue; // already extruded and will no more encounter
4431 // a _LayerEdge containg tgt2
4432 _LayerEdge* neiborEdge = edge->_2neibors->_edges[j];
4434 _TmpMeshFaceOnEdge* f = new _TmpMeshFaceOnEdge( edge, neiborEdge, --_tmpFaceID );
4435 tmpFaces.push_back( f );
4437 dumpCmd(SMESH_Comment("mesh.AddFace([ ")
4438 <<f->_nn[0]->GetID()<<", "<<f->_nn[1]->GetID()<<", "
4439 <<f->_nn[2]->GetID()<<", "<<f->_nn[3]->GetID()<<" ])");
4445 // Check if _LayerEdge's based on EDGE's intersects tmpFaces.
4446 // Perform two loops on _LayerEdge on EDGE's:
4447 // 1) to find and fix intersection
4448 // 2) to check that no new intersection appears as result of 1)
4450 SMDS_ElemIteratorPtr fIt( new SMDS_ElementVectorIterator( tmpFaces.begin(),
4452 auto_ptr<SMESH_ElementSearcher> searcher
4453 ( SMESH_MeshAlgos::GetElementSearcher( *getMeshDS(), fIt ));
4455 // 1) Find intersections
4457 const SMDS_MeshElement* face;
4458 typedef map< _LayerEdge*, set< _LayerEdge*, _LayerEdgeCmp >, _LayerEdgeCmp > TLEdge2LEdgeSet;
4459 TLEdge2LEdgeSet edge2CloseEdge;
4461 const double eps = data._epsilon * data._epsilon;
4462 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
4464 _EdgesOnShape& eos = data._edgesOnShape[ iS ];
4465 if (( eos.ShapeType() != TopAbs_EDGE ) &&
4466 ( eos._sWOL.IsNull() || eos.SWOLType() != TopAbs_FACE ))
4468 for ( size_t i = 0; i < eos._edges.size(); ++i )
4470 _LayerEdge* edge = eos._edges[i];
4471 if ( edge->FindIntersection( *searcher, dist, eps, eos, &face ))
4473 const _TmpMeshFaceOnEdge* f = (const _TmpMeshFaceOnEdge*) face;
4474 set< _LayerEdge*, _LayerEdgeCmp > & ee = edge2CloseEdge[ edge ];
4475 ee.insert( f->_le1 );
4476 ee.insert( f->_le2 );
4477 if ( f->_le1->IsOnEdge() && data.GetShapeEdges( f->_le1 )->_sWOL.IsNull() )
4478 edge2CloseEdge[ f->_le1 ].insert( edge );
4479 if ( f->_le2->IsOnEdge() && data.GetShapeEdges( f->_le2 )->_sWOL.IsNull() )
4480 edge2CloseEdge[ f->_le2 ].insert( edge );
4485 // Set _LayerEdge._normal
4487 if ( !edge2CloseEdge.empty() )
4489 dumpFunction(SMESH_Comment("updateNormals")<<data._index);
4491 set< _EdgesOnShape* > shapesToSmooth;
4493 // vector to store new _normal and _cosin for each edge in edge2CloseEdge
4494 vector< pair< _LayerEdge*, _LayerEdge > > edge2newEdge( edge2CloseEdge.size() );
4496 TLEdge2LEdgeSet::iterator e2ee = edge2CloseEdge.begin();
4497 for ( size_t iE = 0; e2ee != edge2CloseEdge.end(); ++e2ee, ++iE )
4499 _LayerEdge* edge1 = e2ee->first;
4500 _LayerEdge* edge2 = 0;
4501 set< _LayerEdge*, _LayerEdgeCmp >& ee = e2ee->second;
4503 edge2newEdge[ iE ].first = NULL;
4505 _EdgesOnShape* eos1 = data.GetShapeEdges( edge1 );
4506 if ( !eos1 ) continue;
4508 // find EDGEs the edges reside
4509 // TopoDS_Edge E1, E2;
4510 // TopoDS_Shape S = helper.GetSubShapeByNode( edge1->_nodes[0], getMeshDS() );
4511 // if ( S.ShapeType() != TopAbs_EDGE )
4512 // continue; // TODO: find EDGE by VERTEX
4513 // E1 = TopoDS::Edge( S );
4514 set< _LayerEdge*, _LayerEdgeCmp >::iterator eIt = ee.begin();
4515 for ( ; !edge2 && eIt != ee.end(); ++eIt )
4517 if ( eos1->_sWOL == data.GetShapeEdges( *eIt )->_sWOL )
4520 if ( !edge2 ) continue;
4522 edge2newEdge[ iE ].first = edge1;
4523 _LayerEdge& newEdge = edge2newEdge[ iE ].second;
4524 // while ( E2.IsNull() && eIt != ee.end())
4526 // _LayerEdge* e2 = *eIt++;
4527 // TopoDS_Shape S = helper.GetSubShapeByNode( e2->_nodes[0], getMeshDS() );
4528 // if ( S.ShapeType() == TopAbs_EDGE )
4529 // E2 = TopoDS::Edge( S ), edge2 = e2;
4531 // if ( E2.IsNull() ) continue; // TODO: find EDGE by VERTEX
4533 // find 3 FACEs sharing 2 EDGEs
4535 // TopoDS_Face FF1[2], FF2[2];
4536 // PShapeIteratorPtr fIt = helper.GetAncestors(E1, *_mesh, TopAbs_FACE);
4537 // while ( fIt->more() && FF1[1].IsNull() )
4539 // const TopoDS_Face *F = (const TopoDS_Face*) fIt->next();
4540 // if ( helper.IsSubShape( *F, data._solid))
4541 // FF1[ FF1[0].IsNull() ? 0 : 1 ] = *F;
4543 // fIt = helper.GetAncestors(E2, *_mesh, TopAbs_FACE);
4544 // while ( fIt->more() && FF2[1].IsNull())
4546 // const TopoDS_Face *F = (const TopoDS_Face*) fIt->next();
4547 // if ( helper.IsSubShape( *F, data._solid))
4548 // FF2[ FF2[0].IsNull() ? 0 : 1 ] = *F;
4550 // // exclude a FACE common to E1 and E2 (put it to FFn[1] )
4551 // if ( FF1[0].IsSame( FF2[0]) || FF1[0].IsSame( FF2[1]))
4552 // std::swap( FF1[0], FF1[1] );
4553 // if ( FF2[0].IsSame( FF1[0]) )
4554 // std::swap( FF2[0], FF2[1] );
4555 // if ( FF1[0].IsNull() || FF2[0].IsNull() )
4558 // get a new normal for edge1
4560 gp_Vec dir1 = edge1->_normal, dir2 = edge2->_normal;
4561 // if ( edge1->_cosin < 0 )
4562 // dir1 = getFaceDir( FF1[0], E1, edge1->_nodes[0], helper, ok ).Normalized();
4563 // if ( edge2->_cosin < 0 )
4564 // dir2 = getFaceDir( FF2[0], E2, edge2->_nodes[0], helper, ok ).Normalized();
4566 double cos1 = Abs( edge1->_cosin ), cos2 = Abs( edge2->_cosin );
4567 double wgt1 = ( cos1 + 0.001 ) / ( cos1 + cos2 + 0.002 );
4568 double wgt2 = ( cos2 + 0.001 ) / ( cos1 + cos2 + 0.002 );
4569 newEdge._normal = ( wgt1 * dir1 + wgt2 * dir2 ).XYZ();
4570 newEdge._normal.Normalize();
4572 // cout << edge1->_nodes[0]->GetID() << " "
4573 // << edge2->_nodes[0]->GetID() << " NORM: "
4574 // << newEdge._normal.X() << ", " << newEdge._normal.Y() << ", " << newEdge._normal.Z() << endl;
4577 if ( cos1 < theMinSmoothCosin )
4579 newEdge._cosin = edge2->_cosin;
4581 else if ( cos2 > theMinSmoothCosin ) // both cos1 and cos2 > theMinSmoothCosin
4583 // gp_Vec dirInFace;
4584 // if ( edge1->_cosin < 0 )
4585 // dirInFace = dir1;
4587 // dirInFace = getFaceDir( FF1[0], E1, edge1->_nodes[0], helper, ok );
4588 // double angle = dirInFace.Angle( edge1->_normal ); // [0,PI]
4589 // edge1->SetCosin( Cos( angle ));
4590 //newEdge._cosin = 0; // ???????????
4591 newEdge._cosin = ( wgt1 * cos1 + wgt2 * cos2 ) * edge1->_cosin / cos1;
4595 newEdge._cosin = edge1->_cosin;
4598 // find shapes that need smoothing due to change of _normal
4599 if ( edge1->_cosin < theMinSmoothCosin &&
4600 newEdge._cosin > theMinSmoothCosin )
4602 if ( eos1->_sWOL.IsNull() )
4604 SMDS_ElemIteratorPtr fIt = edge1->_nodes[0]->GetInverseElementIterator(SMDSAbs_Face);
4605 while ( fIt->more() )
4606 shapesToSmooth.insert( data.GetShapeEdges( fIt->next()->getshapeId() ));
4607 //limitStepSize( data, fIt->next(), edge1->_cosin ); // too late
4609 else // edge1 inflates along a FACE
4611 TopoDS_Shape V = helper.GetSubShapeByNode( edge1->_nodes[0], getMeshDS() );
4612 PShapeIteratorPtr eIt = helper.GetAncestors( V, *_mesh, TopAbs_EDGE );
4613 while ( const TopoDS_Shape* E = eIt->next() )
4615 if ( !helper.IsSubShape( *E, /*FACE=*/eos1->_sWOL ))
4617 gp_Vec edgeDir = getEdgeDir( TopoDS::Edge( *E ), TopoDS::Vertex( V ));
4618 double angle = edgeDir.Angle( newEdge._normal ); // [0,PI]
4619 if ( angle < M_PI / 2 )
4620 shapesToSmooth.insert( data.GetShapeEdges( *E ));
4626 data.AddShapesToSmooth( shapesToSmooth );
4628 // Update data of edges depending on a new _normal
4630 for ( size_t iE = 0; iE < edge2newEdge.size(); ++iE )
4632 _LayerEdge* edge1 = edge2newEdge[ iE ].first;
4633 _LayerEdge& newEdge = edge2newEdge[ iE ].second;
4634 if ( !edge1 ) continue;
4635 _EdgesOnShape* eos1 = data.GetShapeEdges( edge1 );
4636 if ( !eos1 ) continue;
4638 edge1->_normal = newEdge._normal;
4639 edge1->SetCosin( newEdge._cosin );
4640 edge1->InvalidateStep( 1, *eos1 );
4642 edge1->SetNewLength( data._stepSize, *eos1, helper );
4643 if ( edge1->IsOnEdge() )
4645 const SMDS_MeshNode * n1 = edge1->_2neibors->srcNode(0);
4646 const SMDS_MeshNode * n2 = edge1->_2neibors->srcNode(1);
4647 edge1->SetDataByNeighbors( n1, n2, *eos1, helper );
4650 // Update normals and other dependent data of not intersecting _LayerEdge's
4651 // neighboring the intersecting ones
4653 if ( !edge1->_2neibors )
4655 for ( int j = 0; j < 2; ++j ) // loop on 2 neighbors
4657 _LayerEdge* neighbor = edge1->_2neibors->_edges[j];
4658 if ( edge2CloseEdge.count ( neighbor ))
4659 continue; // j-th neighbor is also intersected
4660 _EdgesOnShape* eos = data.GetShapeEdges( neighbor );
4661 if ( !eos ) continue;
4662 _LayerEdge* prevEdge = edge1;
4663 const int nbSteps = 10;
4664 for ( int step = nbSteps; step; --step ) // step from edge1 in j-th direction
4666 if ( !neighbor->_2neibors )
4667 break; // neighbor is on VERTEX
4669 _LayerEdge* nextEdge = neighbor->_2neibors->_edges[iNext];
4670 if ( nextEdge == prevEdge )
4671 nextEdge = neighbor->_2neibors->_edges[ ++iNext ];
4672 double r = double(step-1)/nbSteps;
4673 if ( !nextEdge->_2neibors )
4676 gp_XYZ newNorm = prevEdge->_normal * r + nextEdge->_normal * (1-r);
4677 newNorm.Normalize();
4679 neighbor->_normal = newNorm;
4680 neighbor->SetCosin( prevEdge->_cosin * r + nextEdge->_cosin * (1-r) );
4681 neighbor->SetDataByNeighbors( prevEdge->_nodes[0], nextEdge->_nodes[0], *eos, helper );
4683 neighbor->InvalidateStep( 1, *eos );
4685 neighbor->SetNewLength( data._stepSize, *eos, helper );
4687 // goto the next neighbor
4688 prevEdge = neighbor;
4689 neighbor = nextEdge;
4695 // 2) Check absence of intersections
4698 for ( size_t i = 0 ; i < tmpFaces.size(); ++i )
4704 //================================================================================
4706 * \brief Modify normals of _LayerEdge's on _ConvexFace's
4708 //================================================================================
4710 bool _ViscousBuilder::updateNormalsOfConvexFaces( _SolidData& data,
4711 SMESH_MesherHelper& helper,
4714 SMESHDS_Mesh* meshDS = helper.GetMeshDS();
4717 map< TGeomID, _ConvexFace >::iterator id2face = data._convexFaces.begin();
4718 for ( ; id2face != data._convexFaces.end(); ++id2face )
4720 _ConvexFace & convFace = (*id2face).second;
4721 if ( convFace._normalsFixed )
4722 continue; // already fixed
4723 if ( convFace.CheckPrisms() )
4724 continue; // nothing to fix
4726 convFace._normalsFixed = true;
4728 BRepAdaptor_Surface surface ( convFace._face, false );
4729 BRepLProp_SLProps surfProp( surface, 2, 1e-6 );
4731 // check if the convex FACE is of spherical shape
4733 Bnd_B3d centersBox; // bbox of centers of curvature of _LayerEdge's on VERTEXes
4737 map< TGeomID, _EdgesOnShape* >::iterator id2eos = convFace._subIdToEOS.begin();
4738 for ( ; id2eos != convFace._subIdToEOS.end(); ++id2eos )
4740 _EdgesOnShape& eos = *(id2eos->second);
4741 if ( eos.ShapeType() == TopAbs_VERTEX )
4743 _LayerEdge* ledge = eos._edges[ 0 ];
4744 if ( convFace.GetCenterOfCurvature( ledge, surfProp, helper, center ))
4745 centersBox.Add( center );
4747 for ( size_t i = 0; i < eos._edges.size(); ++i )
4748 nodesBox.Add( SMESH_TNodeXYZ( eos._edges[ i ]->_nodes[0] ));
4750 if ( centersBox.IsVoid() )
4752 debugMsg( "Error: centersBox.IsVoid()" );
4755 const bool isSpherical =
4756 ( centersBox.SquareExtent() < 1e-6 * nodesBox.SquareExtent() );
4758 int nbEdges = helper.Count( convFace._face, TopAbs_EDGE, /*ignoreSame=*/false );
4759 vector < _CentralCurveOnEdge > centerCurves( nbEdges );
4763 // set _LayerEdge::_normal as average of all normals
4765 // WARNING: different density of nodes on EDGEs is not taken into account that
4766 // can lead to an improper new normal
4768 gp_XYZ avgNormal( 0,0,0 );
4770 id2eos = convFace._subIdToEOS.begin();
4771 for ( ; id2eos != convFace._subIdToEOS.end(); ++id2eos )
4773 _EdgesOnShape& eos = *(id2eos->second);
4774 // set data of _CentralCurveOnEdge
4775 if ( eos.ShapeType() == TopAbs_EDGE )
4777 _CentralCurveOnEdge& ceCurve = centerCurves[ nbEdges++ ];
4778 ceCurve.SetShapes( TopoDS::Edge( eos._shape ), convFace, data, helper );
4779 if ( !eos._sWOL.IsNull() )
4780 ceCurve._adjFace.Nullify();
4782 ceCurve._ledges.insert( ceCurve._ledges.end(),
4783 eos._edges.begin(), eos._edges.end());
4785 // summarize normals
4786 for ( size_t i = 0; i < eos._edges.size(); ++i )
4787 avgNormal += eos._edges[ i ]->_normal;
4789 double normSize = avgNormal.SquareModulus();
4790 if ( normSize < 1e-200 )
4792 debugMsg( "updateNormalsOfConvexFaces(): zero avgNormal" );
4795 avgNormal /= Sqrt( normSize );
4797 // compute new _LayerEdge::_cosin on EDGEs
4798 double avgCosin = 0;
4801 for ( size_t iE = 0; iE < centerCurves.size(); ++iE )
4803 _CentralCurveOnEdge& ceCurve = centerCurves[ iE ];
4804 if ( ceCurve._adjFace.IsNull() )
4806 for ( size_t iLE = 0; iLE < ceCurve._ledges.size(); ++iLE )
4808 const SMDS_MeshNode* node = ceCurve._ledges[ iLE ]->_nodes[0];
4809 inFaceDir = getFaceDir( ceCurve._adjFace, ceCurve._edge, node, helper, isOK );
4812 double angle = inFaceDir.Angle( avgNormal ); // [0,PI]
4813 ceCurve._ledges[ iLE ]->_cosin = Cos( angle );
4814 avgCosin += ceCurve._ledges[ iLE ]->_cosin;
4820 avgCosin /= nbCosin;
4822 // set _LayerEdge::_normal = avgNormal
4823 id2eos = convFace._subIdToEOS.begin();
4824 for ( ; id2eos != convFace._subIdToEOS.end(); ++id2eos )
4826 _EdgesOnShape& eos = *(id2eos->second);
4827 if ( eos.ShapeType() != TopAbs_EDGE )
4828 for ( size_t i = 0; i < eos._edges.size(); ++i )
4829 eos._edges[ i ]->_cosin = avgCosin;
4831 for ( size_t i = 0; i < eos._edges.size(); ++i )
4832 eos._edges[ i ]->_normal = avgNormal;
4835 else // if ( isSpherical )
4837 // We suppose that centers of curvature at all points of the FACE
4838 // lie on some curve, let's call it "central curve". For all _LayerEdge's
4839 // having a common center of curvature we define the same new normal
4840 // as a sum of normals of _LayerEdge's on EDGEs among them.
4842 // get all centers of curvature for each EDGE
4844 helper.SetSubShape( convFace._face );
4845 _LayerEdge* vertexLEdges[2], **edgeLEdge, **edgeLEdgeEnd;
4847 TopExp_Explorer edgeExp( convFace._face, TopAbs_EDGE );
4848 for ( int iE = 0; edgeExp.More(); edgeExp.Next(), ++iE )
4850 const TopoDS_Edge& edge = TopoDS::Edge( edgeExp.Current() );
4852 // set adjacent FACE
4853 centerCurves[ iE ].SetShapes( edge, convFace, data, helper );
4855 // get _LayerEdge's of the EDGE
4856 TGeomID edgeID = meshDS->ShapeToIndex( edge );
4857 _EdgesOnShape* eos = data.GetShapeEdges( edgeID );
4858 if ( !eos || eos->_edges.empty() )
4860 // no _LayerEdge's on EDGE, use _LayerEdge's on VERTEXes
4861 for ( int iV = 0; iV < 2; ++iV )
4863 TopoDS_Vertex v = helper.IthVertex( iV, edge );
4864 TGeomID vID = meshDS->ShapeToIndex( v );
4865 eos = data.GetShapeEdges( vID );
4866 vertexLEdges[ iV ] = eos->_edges[ 0 ];
4868 edgeLEdge = &vertexLEdges[0];
4869 edgeLEdgeEnd = edgeLEdge + 2;
4871 centerCurves[ iE ]._adjFace.Nullify();
4875 if ( ! eos->_toSmooth )
4876 data.SortOnEdge( edge, eos->_edges, helper );
4877 edgeLEdge = &eos->_edges[ 0 ];
4878 edgeLEdgeEnd = edgeLEdge + eos->_edges.size();
4879 vertexLEdges[0] = eos->_edges.front()->_2neibors->_edges[0];
4880 vertexLEdges[1] = eos->_edges.back() ->_2neibors->_edges[1];
4882 if ( ! eos->_sWOL.IsNull() )
4883 centerCurves[ iE ]._adjFace.Nullify();
4886 // Get curvature centers
4890 if ( edgeLEdge[0]->IsOnEdge() &&
4891 convFace.GetCenterOfCurvature( vertexLEdges[0], surfProp, helper, center ))
4893 centerCurves[ iE ].Append( center, vertexLEdges[0] );
4894 centersBox.Add( center );
4896 for ( ; edgeLEdge < edgeLEdgeEnd; ++edgeLEdge )
4897 if ( convFace.GetCenterOfCurvature( *edgeLEdge, surfProp, helper, center ))
4898 { // EDGE or VERTEXes
4899 centerCurves[ iE ].Append( center, *edgeLEdge );
4900 centersBox.Add( center );
4902 if ( edgeLEdge[-1]->IsOnEdge() &&
4903 convFace.GetCenterOfCurvature( vertexLEdges[1], surfProp, helper, center ))
4905 centerCurves[ iE ].Append( center, vertexLEdges[1] );
4906 centersBox.Add( center );
4908 centerCurves[ iE ]._isDegenerated =
4909 ( centersBox.IsVoid() || centersBox.SquareExtent() < 1e-6 * nodesBox.SquareExtent() );
4911 } // loop on EDGES of convFace._face to set up data of centerCurves
4913 // Compute new normals for _LayerEdge's on EDGEs
4915 double avgCosin = 0;
4918 for ( size_t iE1 = 0; iE1 < centerCurves.size(); ++iE1 )
4920 _CentralCurveOnEdge& ceCurve = centerCurves[ iE1 ];
4921 if ( ceCurve._isDegenerated )
4923 const vector< gp_Pnt >& centers = ceCurve._curvaCenters;
4924 vector< gp_XYZ > & newNormals = ceCurve._normals;
4925 for ( size_t iC1 = 0; iC1 < centers.size(); ++iC1 )
4928 for ( size_t iE2 = 0; iE2 < centerCurves.size() && !isOK; ++iE2 )
4931 isOK = centerCurves[ iE2 ].FindNewNormal( centers[ iC1 ], newNormals[ iC1 ]);
4933 if ( isOK && !ceCurve._adjFace.IsNull() )
4935 // compute new _LayerEdge::_cosin
4936 const SMDS_MeshNode* node = ceCurve._ledges[ iC1 ]->_nodes[0];
4937 inFaceDir = getFaceDir( ceCurve._adjFace, ceCurve._edge, node, helper, isOK );
4940 double angle = inFaceDir.Angle( newNormals[ iC1 ] ); // [0,PI]
4941 ceCurve._ledges[ iC1 ]->_cosin = Cos( angle );
4942 avgCosin += ceCurve._ledges[ iC1 ]->_cosin;
4948 // set new normals to _LayerEdge's of NOT degenerated central curves
4949 for ( size_t iE = 0; iE < centerCurves.size(); ++iE )
4951 if ( centerCurves[ iE ]._isDegenerated )
4953 for ( size_t iLE = 0; iLE < centerCurves[ iE ]._ledges.size(); ++iLE )
4954 centerCurves[ iE ]._ledges[ iLE ]->_normal = centerCurves[ iE ]._normals[ iLE ];
4956 // set new normals to _LayerEdge's of degenerated central curves
4957 for ( size_t iE = 0; iE < centerCurves.size(); ++iE )
4959 if ( !centerCurves[ iE ]._isDegenerated ||
4960 centerCurves[ iE ]._ledges.size() < 3 )
4962 // new normal is an average of new normals at VERTEXes that
4963 // was computed on non-degenerated _CentralCurveOnEdge's
4964 gp_XYZ newNorm = ( centerCurves[ iE ]._ledges.front()->_normal +
4965 centerCurves[ iE ]._ledges.back ()->_normal );
4966 double sz = newNorm.Modulus();
4970 double newCosin = ( 0.5 * centerCurves[ iE ]._ledges.front()->_cosin +
4971 0.5 * centerCurves[ iE ]._ledges.back ()->_cosin );
4972 for ( size_t iLE = 1, nb = centerCurves[ iE ]._ledges.size() - 1; iLE < nb; ++iLE )
4974 centerCurves[ iE ]._ledges[ iLE ]->_normal = newNorm;
4975 centerCurves[ iE ]._ledges[ iLE ]->_cosin = newCosin;
4979 // Find new normals for _LayerEdge's based on FACE
4982 avgCosin /= nbCosin;
4983 const TGeomID faceID = meshDS->ShapeToIndex( convFace._face );
4984 map< TGeomID, _EdgesOnShape* >::iterator id2eos = convFace._subIdToEOS.find( faceID );
4985 if ( id2eos != convFace._subIdToEOS.end() )
4989 _EdgesOnShape& eos = * ( id2eos->second );
4990 for ( size_t i = 0; i < eos._edges.size(); ++i )
4992 _LayerEdge* ledge = eos._edges[ i ];
4993 if ( !convFace.GetCenterOfCurvature( ledge, surfProp, helper, center ))
4995 for ( size_t i = 0; i < centerCurves.size(); ++i, ++iE )
4997 iE = iE % centerCurves.size();
4998 if ( centerCurves[ iE ]._isDegenerated )
5000 newNorm.SetCoord( 0,0,0 );
5001 if ( centerCurves[ iE ].FindNewNormal( center, newNorm ))
5003 ledge->_normal = newNorm;
5004 ledge->_cosin = avgCosin;
5011 } // not a quasi-spherical FACE
5013 // Update _LayerEdge's data according to a new normal
5015 dumpFunction(SMESH_Comment("updateNormalsOfConvexFaces")<<data._index
5016 <<"_F"<<meshDS->ShapeToIndex( convFace._face ));
5018 id2eos = convFace._subIdToEOS.begin();
5019 for ( ; id2eos != convFace._subIdToEOS.end(); ++id2eos )
5021 _EdgesOnShape& eos = * ( id2eos->second );
5022 for ( size_t i = 0; i < eos._edges.size(); ++i )
5024 _LayerEdge* & ledge = eos._edges[ i ];
5025 double len = ledge->_len;
5026 ledge->InvalidateStep( stepNb + 1, eos, /*restoreLength=*/true );
5027 ledge->SetCosin( ledge->_cosin );
5028 ledge->SetNewLength( len, eos, helper );
5031 } // loop on sub-shapes of convFace._face
5033 // Find FACEs adjacent to convFace._face that got necessity to smooth
5034 // as a result of normals modification
5036 set< _EdgesOnShape* > adjFacesToSmooth;
5037 for ( size_t iE = 0; iE < centerCurves.size(); ++iE )
5039 if ( centerCurves[ iE ]._adjFace.IsNull() ||
5040 centerCurves[ iE ]._adjFaceToSmooth )
5042 for ( size_t iLE = 0; iLE < centerCurves[ iE ]._ledges.size(); ++iLE )
5044 if ( centerCurves[ iE ]._ledges[ iLE ]->_cosin > theMinSmoothCosin )
5046 adjFacesToSmooth.insert( data.GetShapeEdges( centerCurves[ iE ]._adjFace ));
5051 data.AddShapesToSmooth( adjFacesToSmooth );
5056 } // loop on data._convexFaces
5061 //================================================================================
5063 * \brief Finds a center of curvature of a surface at a _LayerEdge
5065 //================================================================================
5067 bool _ConvexFace::GetCenterOfCurvature( _LayerEdge* ledge,
5068 BRepLProp_SLProps& surfProp,
5069 SMESH_MesherHelper& helper,
5070 gp_Pnt & center ) const
5072 gp_XY uv = helper.GetNodeUV( _face, ledge->_nodes[0] );
5073 surfProp.SetParameters( uv.X(), uv.Y() );
5074 if ( !surfProp.IsCurvatureDefined() )
5077 const double oriFactor = ( _face.Orientation() == TopAbs_REVERSED ? +1. : -1. );
5078 double surfCurvatureMax = surfProp.MaxCurvature() * oriFactor;
5079 double surfCurvatureMin = surfProp.MinCurvature() * oriFactor;
5080 if ( surfCurvatureMin > surfCurvatureMax )
5081 center = surfProp.Value().Translated( surfProp.Normal().XYZ() / surfCurvatureMin * oriFactor );
5083 center = surfProp.Value().Translated( surfProp.Normal().XYZ() / surfCurvatureMax * oriFactor );
5088 //================================================================================
5090 * \brief Check that prisms are not distorted
5092 //================================================================================
5094 bool _ConvexFace::CheckPrisms() const
5097 for ( size_t i = 0; i < _simplexTestEdges.size(); ++i )
5099 const _LayerEdge* edge = _simplexTestEdges[i];
5100 SMESH_TNodeXYZ tgtXYZ( edge->_nodes.back() );
5101 for ( size_t j = 0; j < edge->_simplices.size(); ++j )
5102 if ( !edge->_simplices[j].IsForward( edge->_nodes[0], &tgtXYZ, vol ))
5104 debugMsg( "Bad simplex of _simplexTestEdges ("
5105 << " "<< edge->_nodes[0]->GetID()<< " "<< tgtXYZ._node->GetID()
5106 << " "<< edge->_simplices[j]._nPrev->GetID()
5107 << " "<< edge->_simplices[j]._nNext->GetID() << " )" );
5114 //================================================================================
5116 * \brief Try to compute a new normal by interpolating normals of _LayerEdge's
5117 * stored in this _CentralCurveOnEdge.
5118 * \param [in] center - curvature center of a point of another _CentralCurveOnEdge.
5119 * \param [in,out] newNormal - current normal at this point, to be redefined
5120 * \return bool - true if succeeded.
5122 //================================================================================
5124 bool _CentralCurveOnEdge::FindNewNormal( const gp_Pnt& center, gp_XYZ& newNormal )
5126 if ( this->_isDegenerated )
5129 // find two centers the given one lies between
5131 for ( size_t i = 0, nb = _curvaCenters.size()-1; i < nb; ++i )
5133 double sl2 = 1.001 * _segLength2[ i ];
5135 double d1 = center.SquareDistance( _curvaCenters[ i ]);
5139 double d2 = center.SquareDistance( _curvaCenters[ i+1 ]);
5140 if ( d2 > sl2 || d2 + d1 < 1e-100 )
5145 double r = d1 / ( d1 + d2 );
5146 gp_XYZ norm = (( 1. - r ) * _ledges[ i ]->_normal +
5147 ( r ) * _ledges[ i+1 ]->_normal );
5151 double sz = newNormal.Modulus();
5160 //================================================================================
5162 * \brief Set shape members
5164 //================================================================================
5166 void _CentralCurveOnEdge::SetShapes( const TopoDS_Edge& edge,
5167 const _ConvexFace& convFace,
5169 SMESH_MesherHelper& helper)
5173 PShapeIteratorPtr fIt = helper.GetAncestors( edge, *helper.GetMesh(), TopAbs_FACE );
5174 while ( const TopoDS_Shape* F = fIt->next())
5175 if ( !convFace._face.IsSame( *F ))
5177 _adjFace = TopoDS::Face( *F );
5178 _adjFaceToSmooth = false;
5179 // _adjFace already in a smoothing queue ?
5180 if ( _EdgesOnShape* eos = data.GetShapeEdges( _adjFace ))
5181 _adjFaceToSmooth = eos->_toSmooth;
5186 //================================================================================
5188 * \brief Looks for intersection of it's last segment with faces
5189 * \param distance - returns shortest distance from the last node to intersection
5191 //================================================================================
5193 bool _LayerEdge::FindIntersection( SMESH_ElementSearcher& searcher,
5195 const double& epsilon,
5197 const SMDS_MeshElement** face)
5199 vector< const SMDS_MeshElement* > suspectFaces;
5201 gp_Ax1 lastSegment = LastSegment( segLen, eos );
5202 searcher.GetElementsNearLine( lastSegment, SMDSAbs_Face, suspectFaces );
5204 bool segmentIntersected = false;
5205 distance = Precision::Infinite();
5206 int iFace = -1; // intersected face
5207 for ( size_t j = 0 ; j < suspectFaces.size() /*&& !segmentIntersected*/; ++j )
5209 const SMDS_MeshElement* face = suspectFaces[j];
5210 if ( face->GetNodeIndex( _nodes.back() ) >= 0 ||
5211 face->GetNodeIndex( _nodes[0] ) >= 0 )
5212 continue; // face sharing _LayerEdge node
5213 const int nbNodes = face->NbCornerNodes();
5214 bool intFound = false;
5216 SMDS_MeshElement::iterator nIt = face->begin_nodes();
5219 intFound = SegTriaInter( lastSegment, *nIt++, *nIt++, *nIt++, dist, epsilon );
5223 const SMDS_MeshNode* tria[3];
5226 for ( int n2 = 2; n2 < nbNodes && !intFound; ++n2 )
5229 intFound = SegTriaInter(lastSegment, tria[0], tria[1], tria[2], dist, epsilon );
5235 if ( dist < segLen*(1.01) && dist > -(_len*_lenFactor-segLen) )
5236 segmentIntersected = true;
5237 if ( distance > dist )
5238 distance = dist, iFace = j;
5241 if ( iFace != -1 && face ) *face = suspectFaces[iFace];
5243 if ( segmentIntersected )
5246 SMDS_MeshElement::iterator nIt = suspectFaces[iFace]->begin_nodes();
5247 gp_XYZ intP( lastSegment.Location().XYZ() + lastSegment.Direction().XYZ() * distance );
5248 cout << "nodes: tgt " << _nodes.back()->GetID() << " src " << _nodes[0]->GetID()
5249 << ", intersection with face ("
5250 << (*nIt++)->GetID()<<" "<< (*nIt++)->GetID()<<" "<< (*nIt++)->GetID()
5251 << ") at point (" << intP.X() << ", " << intP.Y() << ", " << intP.Z()
5252 << ") distance = " << distance - segLen<< endl;
5258 return segmentIntersected;
5261 //================================================================================
5263 * \brief Returns size and direction of the last segment
5265 //================================================================================
5267 gp_Ax1 _LayerEdge::LastSegment(double& segLen, _EdgesOnShape& eos) const
5269 // find two non-coincident positions
5270 gp_XYZ orig = _pos.back();
5272 int iPrev = _pos.size() - 2;
5273 const double tol = ( _len > 0 ) ? 0.3*_len : 1e-100; // adjusted for IPAL52478 + PAL22576
5274 while ( iPrev >= 0 )
5276 dir = orig - _pos[iPrev];
5277 if ( dir.SquareModulus() > tol*tol )
5287 segDir.SetLocation( SMESH_TNodeXYZ( _nodes[0] ));
5288 segDir.SetDirection( _normal );
5293 gp_Pnt pPrev = _pos[ iPrev ];
5294 if ( !eos._sWOL.IsNull() )
5296 TopLoc_Location loc;
5297 if ( eos.SWOLType() == TopAbs_EDGE )
5300 Handle(Geom_Curve) curve = BRep_Tool::Curve( TopoDS::Edge( eos._sWOL ), loc, f,l);
5301 pPrev = curve->Value( pPrev.X() ).Transformed( loc );
5305 Handle(Geom_Surface) surface = BRep_Tool::Surface( TopoDS::Face( eos._sWOL ), loc );
5306 pPrev = surface->Value( pPrev.X(), pPrev.Y() ).Transformed( loc );
5308 dir = SMESH_TNodeXYZ( _nodes.back() ) - pPrev.XYZ();
5310 segDir.SetLocation( pPrev );
5311 segDir.SetDirection( dir );
5312 segLen = dir.Modulus();
5318 //================================================================================
5320 * \brief Return the last position of the target node on a FACE.
5321 * \param [in] F - the FACE this _LayerEdge is inflated along
5322 * \return gp_XY - result UV
5324 //================================================================================
5326 gp_XY _LayerEdge::LastUV( const TopoDS_Face& F, _EdgesOnShape& eos ) const
5328 if ( F.IsSame( eos._sWOL )) // F is my FACE
5329 return gp_XY( _pos.back().X(), _pos.back().Y() );
5331 if ( eos.SWOLType() != TopAbs_EDGE ) // wrong call
5332 return gp_XY( 1e100, 1e100 );
5334 // _sWOL is EDGE of F; _pos.back().X() is the last U on the EDGE
5335 double f, l, u = _pos.back().X();
5336 Handle(Geom2d_Curve) C2d = BRep_Tool::CurveOnSurface( TopoDS::Edge(eos._sWOL), F, f,l);
5337 if ( !C2d.IsNull() && f <= u && u <= l )
5338 return C2d->Value( u ).XY();
5340 return gp_XY( 1e100, 1e100 );
5343 //================================================================================
5345 * \brief Test intersection of the last segment with a given triangle
5346 * using Moller-Trumbore algorithm
5347 * Intersection is detected if distance to intersection is less than _LayerEdge._len
5349 //================================================================================
5351 bool _LayerEdge::SegTriaInter( const gp_Ax1& lastSegment,
5352 const SMDS_MeshNode* n0,
5353 const SMDS_MeshNode* n1,
5354 const SMDS_MeshNode* n2,
5356 const double& EPSILON) const
5358 //const double EPSILON = 1e-6;
5360 const gp_Pnt& orig = lastSegment.Location();
5361 const gp_Dir& dir = lastSegment.Direction();
5363 SMESH_TNodeXYZ vert0( n0 );
5364 SMESH_TNodeXYZ vert1( n1 );
5365 SMESH_TNodeXYZ vert2( n2 );
5367 /* calculate distance from vert0 to ray origin */
5368 gp_XYZ tvec = orig.XYZ() - vert0;
5370 //if ( tvec * dir > EPSILON )
5371 // intersected face is at back side of the temporary face this _LayerEdge belongs to
5374 gp_XYZ edge1 = vert1 - vert0;
5375 gp_XYZ edge2 = vert2 - vert0;
5377 /* begin calculating determinant - also used to calculate U parameter */
5378 gp_XYZ pvec = dir.XYZ() ^ edge2;
5380 /* if determinant is near zero, ray lies in plane of triangle */
5381 double det = edge1 * pvec;
5383 if (det > -EPSILON && det < EPSILON)
5386 /* calculate U parameter and test bounds */
5387 double u = ( tvec * pvec ) / det;
5388 //if (u < 0.0 || u > 1.0)
5389 if (u < -EPSILON || u > 1.0 + EPSILON)
5392 /* prepare to test V parameter */
5393 gp_XYZ qvec = tvec ^ edge1;
5395 /* calculate V parameter and test bounds */
5396 double v = (dir.XYZ() * qvec) / det;
5397 //if ( v < 0.0 || u + v > 1.0 )
5398 if ( v < -EPSILON || u + v > 1.0 + EPSILON)
5401 /* calculate t, ray intersects triangle */
5402 t = (edge2 * qvec) / det;
5408 //================================================================================
5410 * \brief Perform smooth of _LayerEdge's based on EDGE's
5411 * \retval bool - true if node has been moved
5413 //================================================================================
5415 bool _LayerEdge::SmoothOnEdge(Handle(Geom_Surface)& surface,
5416 const TopoDS_Face& F,
5417 SMESH_MesherHelper& helper)
5419 ASSERT( IsOnEdge() );
5421 SMDS_MeshNode* tgtNode = const_cast<SMDS_MeshNode*>( _nodes.back() );
5422 SMESH_TNodeXYZ oldPos( tgtNode );
5423 double dist01, distNewOld;
5425 SMESH_TNodeXYZ p0( _2neibors->tgtNode(0));
5426 SMESH_TNodeXYZ p1( _2neibors->tgtNode(1));
5427 dist01 = p0.Distance( _2neibors->tgtNode(1) );
5429 gp_Pnt newPos = p0 * _2neibors->_wgt[0] + p1 * _2neibors->_wgt[1];
5430 double lenDelta = 0;
5433 //lenDelta = _curvature->lenDelta( _len );
5434 lenDelta = _curvature->lenDeltaByDist( dist01 );
5435 newPos.ChangeCoord() += _normal * lenDelta;
5438 distNewOld = newPos.Distance( oldPos );
5442 if ( _2neibors->_plnNorm )
5444 // put newPos on the plane defined by source node and _plnNorm
5445 gp_XYZ new2src = SMESH_TNodeXYZ( _nodes[0] ) - newPos.XYZ();
5446 double new2srcProj = (*_2neibors->_plnNorm) * new2src;
5447 newPos.ChangeCoord() += (*_2neibors->_plnNorm) * new2srcProj;
5449 tgtNode->setXYZ( newPos.X(), newPos.Y(), newPos.Z() );
5450 _pos.back() = newPos.XYZ();
5454 tgtNode->setXYZ( newPos.X(), newPos.Y(), newPos.Z() );
5455 gp_XY uv( Precision::Infinite(), 0 );
5456 helper.CheckNodeUV( F, tgtNode, uv, 1e-10, /*force=*/true );
5457 _pos.back().SetCoord( uv.X(), uv.Y(), 0 );
5459 newPos = surface->Value( uv.X(), uv.Y() );
5460 tgtNode->setXYZ( newPos.X(), newPos.Y(), newPos.Z() );
5463 // commented for IPAL0052478
5464 // if ( _curvature && lenDelta < 0 )
5466 // gp_Pnt prevPos( _pos[ _pos.size()-2 ]);
5467 // _len -= prevPos.Distance( oldPos );
5468 // _len += prevPos.Distance( newPos );
5470 bool moved = distNewOld > dist01/50;
5472 dumpMove( tgtNode ); // debug
5477 //================================================================================
5479 * \brief Perform laplacian smooth in 3D of nodes inflated from FACE
5480 * \retval bool - true if _tgtNode has been moved
5482 //================================================================================
5484 int _LayerEdge::Smooth(const int step, const bool isConcaveFace, const bool findBest )
5486 if ( _simplices.size() < 2 )
5487 return 0; // _LayerEdge inflated along EDGE or FACE
5489 const gp_XYZ& curPos ( _pos.back() );
5490 const gp_XYZ& prevPos( _pos[ _pos.size()-2 ]);
5492 // quality metrics (orientation) of tetras around _tgtNode
5494 double vol, minVolBefore = 1e100;
5495 for ( size_t i = 0; i < _simplices.size(); ++i )
5497 nbOkBefore += _simplices[i].IsForward( _nodes[0], &curPos, vol );
5498 minVolBefore = Min( minVolBefore, vol );
5500 int nbBad = _simplices.size() - nbOkBefore;
5502 // compute new position for the last _pos using different _funs
5504 for ( int iFun = -1; iFun < theNbSmooFuns; ++iFun )
5507 newPos = (this->*_smooFunction)(); // fun chosen by ChooseSmooFunction()
5508 else if ( _funs[ iFun ] == _smooFunction )
5509 continue; // _smooFunction again
5510 else if ( step > 0 )
5511 newPos = (this->*_funs[ iFun ])(); // try other smoothing fun
5513 break; // let "easy" functions improve elements around distorted ones
5517 double delta = _curvature->lenDelta( _len );
5519 newPos += _normal * delta;
5522 double segLen = _normal * ( newPos - prevPos );
5523 if ( segLen + delta > 0 )
5524 newPos += _normal * delta;
5526 // double segLenChange = _normal * ( curPos - newPos );
5527 // newPos += 0.5 * _normal * segLenChange;
5531 double minVolAfter = 1e100;
5532 for ( size_t i = 0; i < _simplices.size(); ++i )
5534 nbOkAfter += _simplices[i].IsForward( _nodes[0], &newPos, vol );
5535 minVolAfter = Min( minVolAfter, vol );
5538 if ( nbOkAfter < nbOkBefore )
5540 if (( isConcaveFace || findBest ) &&
5541 ( nbOkAfter == nbOkBefore ) &&
5542 //( iFun > -1 || nbOkAfter < _simplices.size() ) &&
5543 ( minVolAfter <= minVolBefore ))
5546 SMDS_MeshNode* n = const_cast< SMDS_MeshNode* >( _nodes.back() );
5548 // commented for IPAL0052478
5549 // _len -= prevPos.Distance(SMESH_TNodeXYZ( n ));
5550 // _len += prevPos.Distance(newPos);
5552 n->setXYZ( newPos.X(), newPos.Y(), newPos.Z());
5553 _pos.back() = newPos;
5554 dumpMoveComm( n, _funNames[ iFun < 0 ? smooFunID() : iFun ]);
5556 nbBad = _simplices.size() - nbOkAfter;
5560 //_smooFunction = _funs[ iFun ];
5561 // cout << "# " << _funNames[ iFun ] << "\t N:" << _nodes.back()->GetID()
5562 // << "\t nbBad: " << _simplices.size() - nbOkAfter
5563 // << " minVol: " << minVolAfter
5564 // << " " << newPos.X() << " " << newPos.Y() << " " << newPos.Z()
5566 minVolBefore = minVolAfter;
5567 nbOkBefore = nbOkAfter;
5568 continue; // look for a better function
5574 } // loop on smoothing functions
5579 //================================================================================
5581 * \brief Chooses a smoothing technic giving a position most close to an initial one.
5582 * For a correct result, _simplices must contain nodes lying on geometry.
5584 //================================================================================
5586 void _LayerEdge::ChooseSmooFunction( const set< TGeomID >& concaveVertices,
5587 const TNode2Edge& n2eMap)
5589 if ( _smooFunction ) return;
5591 // use smoothNefPolygon() near concaveVertices
5592 if ( !concaveVertices.empty() )
5594 for ( size_t i = 0; i < _simplices.size(); ++i )
5596 if ( concaveVertices.count( _simplices[i]._nPrev->getshapeId() ))
5598 _smooFunction = _funs[ FUN_NEFPOLY ];
5600 // set FUN_CENTROIDAL to neighbor edges
5601 TNode2Edge::const_iterator n2e;
5602 for ( i = 0; i < _simplices.size(); ++i )
5604 if (( _simplices[i]._nPrev->GetPosition()->GetDim() == 2 ) &&
5605 (( n2e = n2eMap.find( _simplices[i]._nPrev )) != n2eMap.end() ))
5607 n2e->second->_smooFunction = _funs[ FUN_CENTROIDAL ];
5615 // this coice is done only if ( !concaveVertices.empty() ) for Grids/smesh/bugs_19/X1
5616 // where the nodes are smoothed too far along a sphere thus creating
5617 // inverted _simplices
5618 double dist[theNbSmooFuns];
5619 //double coef[theNbSmooFuns] = { 1., 1.2, 1.4, 1.4 };
5620 double coef[theNbSmooFuns] = { 1., 1., 1., 1. };
5622 double minDist = Precision::Infinite();
5623 gp_Pnt p = SMESH_TNodeXYZ( _nodes[0] );
5624 for ( int i = 0; i < FUN_NEFPOLY; ++i )
5626 gp_Pnt newP = (this->*_funs[i])();
5627 dist[i] = p.SquareDistance( newP );
5628 if ( dist[i]*coef[i] < minDist )
5630 _smooFunction = _funs[i];
5631 minDist = dist[i]*coef[i];
5637 _smooFunction = _funs[ FUN_LAPLACIAN ];
5640 // for ( size_t i = 0; i < _simplices.size(); ++i )
5641 // minDim = Min( minDim, _simplices[i]._nPrev->GetPosition()->GetDim() );
5642 // if ( minDim == 0 )
5643 // _smooFunction = _funs[ FUN_CENTROIDAL ];
5644 // else if ( minDim == 1 )
5645 // _smooFunction = _funs[ FUN_CENTROIDAL ];
5649 // for ( int i = 0; i < FUN_NB; ++i )
5651 // //cout << dist[i] << " ";
5652 // if ( _smooFunction == _funs[i] ) {
5654 // //debugMsg( fNames[i] );
5658 // cout << _funNames[ iMin ] << "\t N:" << _nodes.back()->GetID() << endl;
5661 //================================================================================
5663 * \brief Returns a name of _SmooFunction
5665 //================================================================================
5667 int _LayerEdge::smooFunID( _LayerEdge::PSmooFun fun) const
5670 fun = _smooFunction;
5671 for ( int i = 0; i < theNbSmooFuns; ++i )
5672 if ( fun == _funs[i] )
5675 return theNbSmooFuns;
5678 //================================================================================
5680 * \brief Computes a new node position using Laplacian smoothing
5682 //================================================================================
5684 gp_XYZ _LayerEdge::smoothLaplacian()
5686 gp_XYZ newPos (0,0,0);
5687 for ( size_t i = 0; i < _simplices.size(); ++i )
5688 newPos += SMESH_TNodeXYZ( _simplices[i]._nPrev );
5689 newPos /= _simplices.size();
5694 //================================================================================
5696 * \brief Computes a new node position using angular-based smoothing
5698 //================================================================================
5700 gp_XYZ _LayerEdge::smoothAngular()
5702 vector< gp_Vec > edgeDir; edgeDir. reserve( _simplices.size() + 1);
5703 vector< double > edgeSize; edgeSize.reserve( _simplices.size() );
5704 vector< gp_XYZ > points; points. reserve( _simplices.size() );
5706 gp_XYZ pPrev = SMESH_TNodeXYZ( _simplices.back()._nPrev );
5708 for ( size_t i = 0; i < _simplices.size(); ++i )
5710 gp_XYZ p = SMESH_TNodeXYZ( _simplices[i]._nPrev );
5711 edgeDir.push_back( p - pPrev );
5712 edgeSize.push_back( edgeDir.back().Magnitude() );
5713 //double edgeSize = edgeDir.back().Magnitude();
5714 if ( edgeSize.back() < numeric_limits<double>::min() )
5717 edgeSize.pop_back();
5721 edgeDir.back() /= edgeSize.back();
5722 points.push_back( p );
5727 edgeDir.push_back ( edgeDir[0] );
5728 edgeSize.push_back( edgeSize[0] );
5729 pN /= points.size();
5731 gp_XYZ newPos(0,0,0);
5732 //gp_XYZ pN = SMESH_TNodeXYZ( _nodes.back() );
5734 for ( size_t i = 0; i < points.size(); ++i )
5736 gp_Vec toN( pN - points[i]);
5737 double toNLen = toN.Magnitude();
5738 if ( toNLen < numeric_limits<double>::min() )
5743 gp_Vec bisec = edgeDir[i] + edgeDir[i+1];
5744 double bisecLen = bisec.SquareMagnitude();
5745 if ( bisecLen < numeric_limits<double>::min() )
5747 gp_Vec norm = edgeDir[i] ^ toN;
5748 bisec = norm ^ edgeDir[i];
5749 bisecLen = bisec.SquareMagnitude();
5751 bisecLen = Sqrt( bisecLen );
5756 gp_XYZ pNew = ( points[i] + bisec.XYZ() * toNLen ) * bisecLen;
5757 sumSize += bisecLen;
5759 gp_XYZ pNew = ( points[i] + bisec.XYZ() * toNLen ) * ( edgeSize[i] + edgeSize[i+1] );
5760 sumSize += ( edgeSize[i] + edgeSize[i+1] );
5769 //================================================================================
5771 * \brief Computes a new node position using weigthed node positions
5773 //================================================================================
5775 gp_XYZ _LayerEdge::smoothLengthWeighted()
5777 vector< double > edgeSize; edgeSize.reserve( _simplices.size() + 1);
5778 vector< gp_XYZ > points; points. reserve( _simplices.size() );
5780 gp_XYZ pPrev = SMESH_TNodeXYZ( _simplices.back()._nPrev );
5781 for ( size_t i = 0; i < _simplices.size(); ++i )
5783 gp_XYZ p = SMESH_TNodeXYZ( _simplices[i]._nPrev );
5784 edgeSize.push_back( ( p - pPrev ).Modulus() );
5785 if ( edgeSize.back() < numeric_limits<double>::min() )
5787 edgeSize.pop_back();
5791 points.push_back( p );
5795 edgeSize.push_back( edgeSize[0] );
5797 gp_XYZ newPos(0,0,0);
5799 for ( size_t i = 0; i < points.size(); ++i )
5801 newPos += points[i] * ( edgeSize[i] + edgeSize[i+1] );
5802 sumSize += edgeSize[i] + edgeSize[i+1];
5808 //================================================================================
5810 * \brief Computes a new node position using angular-based smoothing
5812 //================================================================================
5814 gp_XYZ _LayerEdge::smoothCentroidal()
5816 gp_XYZ newPos(0,0,0);
5817 gp_XYZ pN = SMESH_TNodeXYZ( _nodes.back() );
5819 for ( size_t i = 0; i < _simplices.size(); ++i )
5821 gp_XYZ p1 = SMESH_TNodeXYZ( _simplices[i]._nPrev );
5822 gp_XYZ p2 = SMESH_TNodeXYZ( _simplices[i]._nNext );
5823 gp_XYZ gc = ( pN + p1 + p2 ) / 3.;
5824 double size = (( p1 - pN ) ^ ( p2 - pN )).Modulus();
5827 newPos += gc * size;
5834 //================================================================================
5836 * \brief Computes a new node position located inside a Nef polygon
5838 //================================================================================
5840 gp_XYZ _LayerEdge::smoothNefPolygon()
5842 gp_XYZ newPos(0,0,0);
5844 // get a plane to seach a solution on
5846 vector< gp_XYZ > vecs( _simplices.size() + 1 );
5848 const double tol = numeric_limits<double>::min();
5849 gp_XYZ center(0,0,0);
5850 for ( i = 0; i < _simplices.size(); ++i )
5852 vecs[i] = ( SMESH_TNodeXYZ( _simplices[i]._nNext ) -
5853 SMESH_TNodeXYZ( _simplices[i]._nPrev ));
5854 center += SMESH_TNodeXYZ( _simplices[i]._nPrev );
5856 vecs.back() = vecs[0];
5857 center /= _simplices.size();
5859 gp_XYZ zAxis(0,0,0);
5860 for ( i = 0; i < _simplices.size(); ++i )
5861 zAxis += vecs[i] ^ vecs[i+1];
5864 for ( i = 0; i < _simplices.size(); ++i )
5867 if ( yAxis.SquareModulus() > tol )
5870 gp_XYZ xAxis = yAxis ^ zAxis;
5871 // SMESH_TNodeXYZ p0( _simplices[0]._nPrev );
5872 // const double tol = 1e-6 * ( p0.Distance( _simplices[1]._nPrev ) +
5873 // p0.Distance( _simplices[2]._nPrev ));
5874 // gp_XYZ center = smoothLaplacian();
5875 // gp_XYZ xAxis, yAxis, zAxis;
5876 // for ( i = 0; i < _simplices.size(); ++i )
5878 // xAxis = SMESH_TNodeXYZ( _simplices[i]._nPrev ) - center;
5879 // if ( xAxis.SquareModulus() > tol*tol )
5882 // for ( i = 1; i < _simplices.size(); ++i )
5884 // yAxis = SMESH_TNodeXYZ( _simplices[i]._nPrev ) - center;
5885 // zAxis = xAxis ^ yAxis;
5886 // if ( zAxis.SquareModulus() > tol*tol )
5889 // if ( i == _simplices.size() ) return newPos;
5891 yAxis = zAxis ^ xAxis;
5892 xAxis /= xAxis.Modulus();
5893 yAxis /= yAxis.Modulus();
5895 // get half-planes of _simplices
5897 vector< _halfPlane > halfPlns( _simplices.size() );
5899 for ( size_t i = 0; i < _simplices.size(); ++i )
5901 gp_XYZ OP1 = SMESH_TNodeXYZ( _simplices[i]._nPrev ) - center;
5902 gp_XYZ OP2 = SMESH_TNodeXYZ( _simplices[i]._nNext ) - center;
5903 gp_XY p1( OP1 * xAxis, OP1 * yAxis );
5904 gp_XY p2( OP2 * xAxis, OP2 * yAxis );
5905 gp_XY vec12 = p2 - p1;
5906 double dist12 = vec12.Modulus();
5910 halfPlns[ nbHP ]._pos = p1;
5911 halfPlns[ nbHP ]._dir = vec12;
5912 halfPlns[ nbHP ]._inNorm.SetCoord( -vec12.Y(), vec12.X() );
5916 // intersect boundaries of half-planes, define state of intersection points
5917 // in relation to all half-planes and calculate internal point of a 2D polygon
5920 gp_XY newPos2D (0,0);
5922 enum { UNDEF = -1, NOT_OUT, IS_OUT, NO_INT };
5923 typedef std::pair< gp_XY, int > TIntPntState; // coord and isOut state
5924 TIntPntState undefIPS( gp_XY(1e100,1e100), UNDEF );
5926 vector< vector< TIntPntState > > allIntPnts( nbHP );
5927 for ( int iHP1 = 0; iHP1 < nbHP; ++iHP1 )
5929 vector< TIntPntState > & intPnts1 = allIntPnts[ iHP1 ];
5930 if ( intPnts1.empty() ) intPnts1.resize( nbHP, undefIPS );
5932 int iPrev = SMESH_MesherHelper::WrapIndex( iHP1 - 1, nbHP );
5933 int iNext = SMESH_MesherHelper::WrapIndex( iHP1 + 1, nbHP );
5936 const gp_XY* segEnds[2] = { 0, 0 }; // NOT_OUT points
5938 for ( int iHP2 = 0; iHP2 < nbHP; ++iHP2 )
5940 if ( iHP1 == iHP2 ) continue;
5942 TIntPntState & ips1 = intPnts1[ iHP2 ];
5943 if ( ips1.second == UNDEF )
5945 // find an intersection point of boundaries of iHP1 and iHP2
5947 if ( iHP2 == iPrev ) // intersection with neighbors is known
5948 ips1.first = halfPlns[ iHP1 ]._pos;
5949 else if ( iHP2 == iNext )
5950 ips1.first = halfPlns[ iHP2 ]._pos;
5951 else if ( !halfPlns[ iHP1 ].FindInterestion( halfPlns[ iHP2 ], ips1.first ))
5952 ips1.second = NO_INT;
5954 // classify the found intersection point
5955 if ( ips1.second != NO_INT )
5957 ips1.second = NOT_OUT;
5958 for ( int i = 0; i < nbHP && ips1.second == NOT_OUT; ++i )
5959 if ( i != iHP1 && i != iHP2 &&
5960 halfPlns[ i ].IsOut( ips1.first, tol ))
5961 ips1.second = IS_OUT;
5963 vector< TIntPntState > & intPnts2 = allIntPnts[ iHP2 ];
5964 if ( intPnts2.empty() ) intPnts2.resize( nbHP, undefIPS );
5965 TIntPntState & ips2 = intPnts2[ iHP1 ];
5968 if ( ips1.second == NOT_OUT )
5971 segEnds[ bool(segEnds[0]) ] = & ips1.first;
5975 // find a NOT_OUT segment of boundary which is located between
5976 // two NOT_OUT int points
5979 continue; // no such a segment
5983 // sort points along the boundary
5984 map< double, TIntPntState* > ipsByParam;
5985 for ( int iHP2 = 0; iHP2 < nbHP; ++iHP2 )
5987 TIntPntState & ips1 = intPnts1[ iHP2 ];
5988 if ( ips1.second != NO_INT )
5990 gp_XY op = ips1.first - halfPlns[ iHP1 ]._pos;
5991 double param = op * halfPlns[ iHP1 ]._dir;
5992 ipsByParam.insert( make_pair( param, & ips1 ));
5995 // look for two neighboring NOT_OUT points
5997 map< double, TIntPntState* >::iterator u2ips = ipsByParam.begin();
5998 for ( ; u2ips != ipsByParam.end(); ++u2ips )
6000 TIntPntState & ips1 = *(u2ips->second);
6001 if ( ips1.second == NOT_OUT )
6002 segEnds[ bool( nbNotOut++ ) ] = & ips1.first;
6003 else if ( nbNotOut >= 2 )
6010 if ( nbNotOut >= 2 )
6012 double len = ( *segEnds[0] - *segEnds[1] ).Modulus();
6015 newPos2D += 0.5 * len * ( *segEnds[0] + *segEnds[1] );
6022 newPos = center + xAxis * newPos2D.X() + yAxis * newPos2D.Y();
6032 //================================================================================
6034 * \brief Add a new segment to _LayerEdge during inflation
6036 //================================================================================
6038 void _LayerEdge::SetNewLength( double len, _EdgesOnShape& eos, SMESH_MesherHelper& helper )
6040 if ( _len - len > -1e-6 )
6042 //_pos.push_back( _pos.back() );
6046 SMDS_MeshNode* n = const_cast< SMDS_MeshNode*>( _nodes.back() );
6047 gp_XYZ oldXYZ = SMESH_TNodeXYZ( n );
6049 if ( eos._hyp.IsOffsetMethod() )
6053 SMDS_ElemIteratorPtr faceIt = _nodes[0]->GetInverseElementIterator( SMDSAbs_Face );
6054 while ( faceIt->more() )
6056 const SMDS_MeshElement* face = faceIt->next();
6057 if ( !eos.GetNormal( face, faceNorm ))
6060 // translate plane of a face
6061 gp_XYZ baryCenter = oldXYZ + faceNorm.XYZ() * ( len - _len );
6063 // find point of intersection of the face plane located at baryCenter
6064 // and _normal located at newXYZ
6065 double d = -( faceNorm.XYZ() * baryCenter ); // d of plane equation ax+by+cz+d=0
6066 double dot = ( faceNorm.XYZ() * _normal );
6067 if ( dot < std::numeric_limits<double>::min() )
6068 dot = ( len - _len ) * 1e-3;
6069 double step = -( faceNorm.XYZ() * newXYZ + d ) / dot;
6070 newXYZ += step * _normal;
6075 newXYZ = oldXYZ + _normal * ( len - _len ) * _lenFactor;
6077 n->setXYZ( newXYZ.X(), newXYZ.Y(), newXYZ.Z() );
6079 _pos.push_back( newXYZ );
6082 if ( !eos._sWOL.IsNull() )
6085 if ( eos.SWOLType() == TopAbs_EDGE )
6087 double u = Precision::Infinite(); // to force projection w/o distance check
6088 helper.CheckNodeU( TopoDS::Edge( eos._sWOL ), n, u, 1e-10, /*force=*/true, distXYZ );
6089 _pos.back().SetCoord( u, 0, 0 );
6090 if ( _nodes.size() > 1 )
6092 SMDS_EdgePosition* pos = static_cast<SMDS_EdgePosition*>( n->GetPosition() );
6093 pos->SetUParameter( u );
6098 gp_XY uv( Precision::Infinite(), 0 );
6099 helper.CheckNodeUV( TopoDS::Face( eos._sWOL ), n, uv, 1e-10, /*force=*/true, distXYZ );
6100 _pos.back().SetCoord( uv.X(), uv.Y(), 0 );
6101 if ( _nodes.size() > 1 )
6103 SMDS_FacePosition* pos = static_cast<SMDS_FacePosition*>( n->GetPosition() );
6104 pos->SetUParameter( uv.X() );
6105 pos->SetVParameter( uv.Y() );
6108 n->setXYZ( distXYZ[1], distXYZ[2], distXYZ[3]);
6110 dumpMove( n ); //debug
6113 //================================================================================
6115 * \brief Remove last inflation step
6117 //================================================================================
6119 void _LayerEdge::InvalidateStep( int curStep, const _EdgesOnShape& eos, bool restoreLength )
6121 if ( _pos.size() > curStep )
6123 if ( restoreLength )
6124 _len -= ( _pos[ curStep-1 ] - _pos.back() ).Modulus();
6126 _pos.resize( curStep );
6127 gp_Pnt nXYZ = _pos.back();
6128 SMDS_MeshNode* n = const_cast< SMDS_MeshNode*>( _nodes.back() );
6129 if ( !eos._sWOL.IsNull() )
6131 TopLoc_Location loc;
6132 if ( eos.SWOLType() == TopAbs_EDGE )
6134 SMDS_EdgePosition* pos = static_cast<SMDS_EdgePosition*>( n->GetPosition() );
6135 pos->SetUParameter( nXYZ.X() );
6137 Handle(Geom_Curve) curve = BRep_Tool::Curve( TopoDS::Edge( eos._sWOL ), loc, f,l);
6138 nXYZ = curve->Value( nXYZ.X() ).Transformed( loc );
6142 SMDS_FacePosition* pos = static_cast<SMDS_FacePosition*>( n->GetPosition() );
6143 pos->SetUParameter( nXYZ.X() );
6144 pos->SetVParameter( nXYZ.Y() );
6145 Handle(Geom_Surface) surface = BRep_Tool::Surface( TopoDS::Face(eos._sWOL), loc );
6146 nXYZ = surface->Value( nXYZ.X(), nXYZ.Y() ).Transformed( loc );
6149 n->setXYZ( nXYZ.X(), nXYZ.Y(), nXYZ.Z() );
6154 //================================================================================
6156 * \brief Create layers of prisms
6158 //================================================================================
6160 bool _ViscousBuilder::refine(_SolidData& data)
6162 SMESH_MesherHelper helper( *_mesh );
6163 helper.SetSubShape( data._solid );
6164 helper.SetElementsOnShape(false);
6166 Handle(Geom_Curve) curve;
6167 Handle(Geom_Surface) surface;
6168 TopoDS_Edge geomEdge;
6169 TopoDS_Face geomFace;
6170 TopoDS_Shape prevSWOL;
6171 TopLoc_Location loc;
6175 TGeomID prevBaseId = -1;
6176 TNode2Edge* n2eMap = 0;
6177 TNode2Edge::iterator n2e;
6179 // Create intermediate nodes on each _LayerEdge
6181 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
6183 _EdgesOnShape& eos = data._edgesOnShape[iS];
6184 if ( eos._edges.empty() ) continue;
6186 if ( eos._edges[0]->_nodes.size() < 2 )
6187 continue; // on _noShrinkShapes
6189 for ( size_t i = 0; i < eos._edges.size(); ++i )
6191 _LayerEdge& edge = *eos._edges[i];
6193 // get accumulated length of segments
6194 vector< double > segLen( edge._pos.size() );
6196 for ( size_t j = 1; j < edge._pos.size(); ++j )
6197 segLen[j] = segLen[j-1] + (edge._pos[j-1] - edge._pos[j] ).Modulus();
6199 // allocate memory for new nodes if it is not yet refined
6200 const SMDS_MeshNode* tgtNode = edge._nodes.back();
6201 if ( edge._nodes.size() == 2 )
6203 edge._nodes.resize( eos._hyp.GetNumberLayers() + 1, 0 );
6205 edge._nodes.back() = tgtNode;
6207 // get data of a shrink shape
6208 if ( !eos._sWOL.IsNull() && eos._sWOL != prevSWOL )
6210 isOnEdge = ( eos.SWOLType() == TopAbs_EDGE );
6213 geomEdge = TopoDS::Edge( eos._sWOL );
6214 curve = BRep_Tool::Curve( geomEdge, loc, f,l);
6218 geomFace = TopoDS::Face( eos._sWOL );
6219 surface = BRep_Tool::Surface( geomFace, loc );
6221 prevSWOL = eos._sWOL;
6223 // restore shapePos of the last node by already treated _LayerEdge of another _SolidData
6224 const TGeomID baseShapeId = edge._nodes[0]->getshapeId();
6225 if ( baseShapeId != prevBaseId )
6227 map< TGeomID, TNode2Edge* >::iterator s2ne = data._s2neMap.find( baseShapeId );
6228 n2eMap = ( s2ne == data._s2neMap.end() ) ? 0 : n2eMap = s2ne->second;
6229 prevBaseId = baseShapeId;
6231 _LayerEdge* edgeOnSameNode = 0;
6232 if ( n2eMap && (( n2e = n2eMap->find( edge._nodes[0] )) != n2eMap->end() ))
6234 edgeOnSameNode = n2e->second;
6235 const gp_XYZ& otherTgtPos = edgeOnSameNode->_pos.back();
6236 SMDS_PositionPtr lastPos = tgtNode->GetPosition();
6239 SMDS_EdgePosition* epos = static_cast<SMDS_EdgePosition*>( lastPos );
6240 epos->SetUParameter( otherTgtPos.X() );
6244 SMDS_FacePosition* fpos = static_cast<SMDS_FacePosition*>( lastPos );
6245 fpos->SetUParameter( otherTgtPos.X() );
6246 fpos->SetVParameter( otherTgtPos.Y() );
6249 // calculate height of the first layer
6251 const double T = segLen.back(); //data._hyp.GetTotalThickness();
6252 const double f = eos._hyp.GetStretchFactor();
6253 const int N = eos._hyp.GetNumberLayers();
6254 const double fPowN = pow( f, N );
6255 if ( fPowN - 1 <= numeric_limits<double>::min() )
6258 h0 = T * ( f - 1 )/( fPowN - 1 );
6260 const double zeroLen = std::numeric_limits<double>::min();
6262 // create intermediate nodes
6263 double hSum = 0, hi = h0/f;
6265 for ( size_t iStep = 1; iStep < edge._nodes.size(); ++iStep )
6267 // compute an intermediate position
6270 while ( hSum > segLen[iSeg] && iSeg < segLen.size()-1)
6272 int iPrevSeg = iSeg-1;
6273 while ( fabs( segLen[iPrevSeg] - segLen[iSeg]) <= zeroLen && iPrevSeg > 0 )
6275 double r = ( segLen[iSeg] - hSum ) / ( segLen[iSeg] - segLen[iPrevSeg] );
6276 gp_Pnt pos = r * edge._pos[iPrevSeg] + (1-r) * edge._pos[iSeg];
6278 SMDS_MeshNode*& node = const_cast< SMDS_MeshNode*& >( edge._nodes[ iStep ]);
6279 if ( !eos._sWOL.IsNull() )
6281 // compute XYZ by parameters <pos>
6286 pos = curve->Value( u ).Transformed(loc);
6290 uv.SetCoord( pos.X(), pos.Y() );
6292 pos = surface->Value( pos.X(), pos.Y() ).Transformed(loc);
6295 // create or update the node
6298 node = helper.AddNode( pos.X(), pos.Y(), pos.Z());
6299 if ( !eos._sWOL.IsNull() )
6302 getMeshDS()->SetNodeOnEdge( node, geomEdge, u );
6304 getMeshDS()->SetNodeOnFace( node, geomFace, uv.X(), uv.Y() );
6308 getMeshDS()->SetNodeInVolume( node, helper.GetSubShapeID() );
6313 if ( !eos._sWOL.IsNull() )
6315 // make average pos from new and current parameters
6318 u = 0.5 * ( u + helper.GetNodeU( geomEdge, node ));
6319 pos = curve->Value( u ).Transformed(loc);
6321 SMDS_EdgePosition* epos = static_cast<SMDS_EdgePosition*>( node->GetPosition() );
6322 epos->SetUParameter( u );
6326 uv = 0.5 * ( uv + helper.GetNodeUV( geomFace, node ));
6327 pos = surface->Value( uv.X(), uv.Y()).Transformed(loc);
6329 SMDS_FacePosition* fpos = static_cast<SMDS_FacePosition*>( node->GetPosition() );
6330 fpos->SetUParameter( uv.X() );
6331 fpos->SetVParameter( uv.Y() );
6334 node->setXYZ( pos.X(), pos.Y(), pos.Z() );
6336 } // loop on edge._nodes
6338 if ( !eos._sWOL.IsNull() ) // prepare for shrink()
6341 edge._pos.back().SetCoord( u, 0,0);
6343 edge._pos.back().SetCoord( uv.X(), uv.Y() ,0);
6345 if ( edgeOnSameNode )
6346 edgeOnSameNode->_pos.back() = edge._pos.back();
6349 } // loop on eos._edges to create nodes
6352 if ( !getMeshDS()->IsEmbeddedMode() )
6353 // Log node movement
6354 for ( size_t i = 0; i < eos._edges.size(); ++i )
6356 SMESH_TNodeXYZ p ( eos._edges[i]->_nodes.back() );
6357 getMeshDS()->MoveNode( p._node, p.X(), p.Y(), p.Z() );
6364 helper.SetElementsOnShape(true);
6366 vector< vector<const SMDS_MeshNode*>* > nnVec;
6367 set< vector<const SMDS_MeshNode*>* > nnSet;
6368 set< int > degenEdgeInd;
6369 vector<const SMDS_MeshElement*> degenVols;
6371 TopExp_Explorer exp( data._solid, TopAbs_FACE );
6372 for ( ; exp.More(); exp.Next() )
6374 const TGeomID faceID = getMeshDS()->ShapeToIndex( exp.Current() );
6375 if ( data._ignoreFaceIds.count( faceID ))
6377 const bool isReversedFace = data._reversedFaceIds.count( faceID );
6378 SMESHDS_SubMesh* fSubM = getMeshDS()->MeshElements( exp.Current() );
6379 SMDS_ElemIteratorPtr fIt = fSubM->GetElements();
6380 while ( fIt->more() )
6382 const SMDS_MeshElement* face = fIt->next();
6383 const int nbNodes = face->NbCornerNodes();
6384 nnVec.resize( nbNodes );
6386 degenEdgeInd.clear();
6388 SMDS_NodeIteratorPtr nIt = face->nodeIterator();
6389 for ( int iN = 0; iN < nbNodes; ++iN )
6391 const SMDS_MeshNode* n = nIt->next();
6392 const int i = isReversedFace ? nbNodes-1-iN : iN;
6393 nnVec[ i ] = & data._n2eMap[ n ]->_nodes;
6394 if ( nnVec[ i ]->size() < 2 )
6395 degenEdgeInd.insert( iN );
6397 nbZ = nnVec[ i ]->size();
6399 if ( helper.HasDegeneratedEdges() )
6400 nnSet.insert( nnVec[ i ]);
6404 if ( 0 < nnSet.size() && nnSet.size() < 3 )
6410 switch ( degenEdgeInd.size() )
6414 for ( int iZ = 1; iZ < nbZ; ++iZ )
6415 helper.AddVolume( (*nnVec[0])[iZ-1], (*nnVec[1])[iZ-1], (*nnVec[2])[iZ-1],
6416 (*nnVec[0])[iZ], (*nnVec[1])[iZ], (*nnVec[2])[iZ]);
6421 int i2 = *degenEdgeInd.begin();
6422 int i0 = helper.WrapIndex( i2 - 1, nbNodes );
6423 int i1 = helper.WrapIndex( i2 + 1, nbNodes );
6424 for ( int iZ = 1; iZ < nbZ; ++iZ )
6425 helper.AddVolume( (*nnVec[i0])[iZ-1], (*nnVec[i1])[iZ-1],
6426 (*nnVec[i1])[iZ], (*nnVec[i0])[iZ], (*nnVec[i2])[0]);
6431 int i3 = !degenEdgeInd.count(0) ? 0 : !degenEdgeInd.count(1) ? 1 : 2;
6432 for ( int iZ = 1; iZ < nbZ; ++iZ )
6433 helper.AddVolume( (*nnVec[0])[iZ-1], (*nnVec[1])[iZ-1], (*nnVec[2])[iZ-1],
6441 switch ( degenEdgeInd.size() )
6445 for ( int iZ = 1; iZ < nbZ; ++iZ )
6446 helper.AddVolume( (*nnVec[0])[iZ-1], (*nnVec[1])[iZ-1],
6447 (*nnVec[2])[iZ-1], (*nnVec[3])[iZ-1],
6448 (*nnVec[0])[iZ], (*nnVec[1])[iZ],
6449 (*nnVec[2])[iZ], (*nnVec[3])[iZ]);
6454 int i2 = *degenEdgeInd.begin();
6455 int i3 = *degenEdgeInd.rbegin();
6456 bool ok = ( i3 - i2 == 1 );
6457 if ( i2 == 0 && i3 == 3 ) { i2 = 3; i3 = 0; ok = true; }
6458 int i0 = helper.WrapIndex( i3 + 1, nbNodes );
6459 int i1 = helper.WrapIndex( i0 + 1, nbNodes );
6460 for ( int iZ = 1; iZ < nbZ; ++iZ )
6462 const SMDS_MeshElement* vol =
6463 helper.AddVolume( (*nnVec[i3])[0], (*nnVec[i0])[iZ], (*nnVec[i0])[iZ-1],
6464 (*nnVec[i2])[0], (*nnVec[i1])[iZ], (*nnVec[i1])[iZ-1]);
6466 degenVols.push_back( vol );
6470 case 3: // degen HEX
6472 const SMDS_MeshNode* nn[8];
6473 for ( int iZ = 1; iZ < nbZ; ++iZ )
6475 const SMDS_MeshElement* vol =
6476 helper.AddVolume( nnVec[0]->size() > 1 ? (*nnVec[0])[iZ-1] : (*nnVec[0])[0],
6477 nnVec[1]->size() > 1 ? (*nnVec[1])[iZ-1] : (*nnVec[1])[0],
6478 nnVec[2]->size() > 1 ? (*nnVec[2])[iZ-1] : (*nnVec[2])[0],
6479 nnVec[3]->size() > 1 ? (*nnVec[3])[iZ-1] : (*nnVec[3])[0],
6480 nnVec[0]->size() > 1 ? (*nnVec[0])[iZ] : (*nnVec[0])[0],
6481 nnVec[1]->size() > 1 ? (*nnVec[1])[iZ] : (*nnVec[1])[0],
6482 nnVec[2]->size() > 1 ? (*nnVec[2])[iZ] : (*nnVec[2])[0],
6483 nnVec[3]->size() > 1 ? (*nnVec[3])[iZ] : (*nnVec[3])[0]);
6484 degenVols.push_back( vol );
6492 return error("Not supported type of element", data._index);
6494 } // switch ( nbNodes )
6495 } // while ( fIt->more() )
6498 if ( !degenVols.empty() )
6500 SMESH_ComputeErrorPtr& err = _mesh->GetSubMesh( data._solid )->GetComputeError();
6501 if ( !err || err->IsOK() )
6503 err.reset( new SMESH_ComputeError( COMPERR_WARNING,
6504 "Degenerated volumes created" ));
6505 err->myBadElements.insert( err->myBadElements.end(),
6506 degenVols.begin(),degenVols.end() );
6513 //================================================================================
6515 * \brief Shrink 2D mesh on faces to let space for inflated layers
6517 //================================================================================
6519 bool _ViscousBuilder::shrink()
6521 // make map of (ids of FACEs to shrink mesh on) to (_SolidData containing _LayerEdge's
6522 // inflated along FACE or EDGE)
6523 map< TGeomID, _SolidData* > f2sdMap;
6524 for ( size_t i = 0 ; i < _sdVec.size(); ++i )
6526 _SolidData& data = _sdVec[i];
6527 TopTools_MapOfShape FFMap;
6528 map< TGeomID, TopoDS_Shape >::iterator s2s = data._shrinkShape2Shape.begin();
6529 for (; s2s != data._shrinkShape2Shape.end(); ++s2s )
6530 if ( s2s->second.ShapeType() == TopAbs_FACE )
6532 f2sdMap.insert( make_pair( getMeshDS()->ShapeToIndex( s2s->second ), &data ));
6534 if ( FFMap.Add( (*s2s).second ))
6535 // Put mesh faces on the shrinked FACE to the proxy sub-mesh to avoid
6536 // usage of mesh faces made in addBoundaryElements() by the 3D algo or
6537 // by StdMeshers_QuadToTriaAdaptor
6538 if ( SMESHDS_SubMesh* smDS = getMeshDS()->MeshElements( s2s->second ))
6540 SMESH_ProxyMesh::SubMesh* proxySub =
6541 data._proxyMesh->getFaceSubM( TopoDS::Face( s2s->second ), /*create=*/true);
6542 SMDS_ElemIteratorPtr fIt = smDS->GetElements();
6543 while ( fIt->more() )
6544 proxySub->AddElement( fIt->next() );
6545 // as a result 3D algo will use elements from proxySub and not from smDS
6550 SMESH_MesherHelper helper( *_mesh );
6551 helper.ToFixNodeParameters( true );
6554 map< TGeomID, _Shrinker1D > e2shrMap;
6555 vector< _EdgesOnShape* > subEOS;
6556 vector< _LayerEdge* > lEdges;
6558 // loop on FACES to srink mesh on
6559 map< TGeomID, _SolidData* >::iterator f2sd = f2sdMap.begin();
6560 for ( ; f2sd != f2sdMap.end(); ++f2sd )
6562 _SolidData& data = *f2sd->second;
6563 const TopoDS_Face& F = TopoDS::Face( getMeshDS()->IndexToShape( f2sd->first ));
6564 SMESH_subMesh* sm = _mesh->GetSubMesh( F );
6565 SMESHDS_SubMesh* smDS = sm->GetSubMeshDS();
6567 Handle(Geom_Surface) surface = BRep_Tool::Surface(F);
6569 helper.SetSubShape(F);
6571 // ===========================
6572 // Prepare data for shrinking
6573 // ===========================
6575 // Collect nodes to smooth, as src nodes are not yet replaced by tgt ones
6576 // and thus all nodes on a FACE connected to 2d elements are to be smoothed
6577 vector < const SMDS_MeshNode* > smoothNodes;
6579 SMDS_NodeIteratorPtr nIt = smDS->GetNodes();
6580 while ( nIt->more() )
6582 const SMDS_MeshNode* n = nIt->next();
6583 if ( n->NbInverseElements( SMDSAbs_Face ) > 0 )
6584 smoothNodes.push_back( n );
6587 // Find out face orientation
6589 const set<TGeomID> ignoreShapes;
6591 if ( !smoothNodes.empty() )
6593 vector<_Simplex> simplices;
6594 _Simplex::GetSimplices( smoothNodes[0], simplices, ignoreShapes );
6595 helper.GetNodeUV( F, simplices[0]._nPrev, 0, &isOkUV ); // fix UV of silpmex nodes
6596 helper.GetNodeUV( F, simplices[0]._nNext, 0, &isOkUV );
6597 gp_XY uv = helper.GetNodeUV( F, smoothNodes[0], 0, &isOkUV );
6598 if ( !simplices[0].IsForward(uv, smoothNodes[0], F, helper,refSign) )
6602 // Find _LayerEdge's inflated along F
6606 SMESH_subMeshIteratorPtr subIt = sm->getDependsOnIterator(/*includeSelf=*/false,
6607 /*complexFirst=*/true); //!!!
6608 while ( subIt->more() )
6610 const TGeomID subID = subIt->next()->GetId();
6611 if ( data._noShrinkShapes.count( subID ))
6613 _EdgesOnShape* eos = data.GetShapeEdges( subID );
6614 if ( !eos || eos->_sWOL.IsNull() ) continue;
6616 subEOS.push_back( eos );
6618 for ( size_t i = 0; i < eos->_edges.size(); ++i )
6620 lEdges.push_back( eos->_edges[ i ] );
6621 prepareEdgeToShrink( *eos->_edges[ i ], *eos, helper, smDS );
6626 dumpFunction(SMESH_Comment("beforeShrinkFace")<<f2sd->first); // debug
6627 SMDS_ElemIteratorPtr fIt = smDS->GetElements();
6628 while ( fIt->more() )
6629 if ( const SMDS_MeshElement* f = fIt->next() )
6630 dumpChangeNodes( f );
6633 // Replace source nodes by target nodes in mesh faces to shrink
6634 dumpFunction(SMESH_Comment("replNodesOnFace")<<f2sd->first); // debug
6635 const SMDS_MeshNode* nodes[20];
6636 for ( size_t iS = 0; iS < subEOS.size(); ++iS )
6638 _EdgesOnShape& eos = * subEOS[ iS ];
6639 for ( size_t i = 0; i < eos._edges.size(); ++i )
6641 _LayerEdge& edge = *eos._edges[i];
6642 const SMDS_MeshNode* srcNode = edge._nodes[0];
6643 const SMDS_MeshNode* tgtNode = edge._nodes.back();
6644 SMDS_ElemIteratorPtr fIt = srcNode->GetInverseElementIterator(SMDSAbs_Face);
6645 while ( fIt->more() )
6647 const SMDS_MeshElement* f = fIt->next();
6648 if ( !smDS->Contains( f ))
6650 SMDS_NodeIteratorPtr nIt = f->nodeIterator();
6651 for ( int iN = 0; nIt->more(); ++iN )
6653 const SMDS_MeshNode* n = nIt->next();
6654 nodes[iN] = ( n == srcNode ? tgtNode : n );
6656 helper.GetMeshDS()->ChangeElementNodes( f, nodes, f->NbNodes() );
6657 dumpChangeNodes( f );
6663 // find out if a FACE is concave
6664 const bool isConcaveFace = isConcave( F, helper );
6666 // Create _SmoothNode's on face F
6667 vector< _SmoothNode > nodesToSmooth( smoothNodes.size() );
6669 dumpFunction(SMESH_Comment("fixUVOnFace")<<f2sd->first); // debug
6670 const bool sortSimplices = isConcaveFace;
6671 for ( size_t i = 0; i < smoothNodes.size(); ++i )
6673 const SMDS_MeshNode* n = smoothNodes[i];
6674 nodesToSmooth[ i ]._node = n;
6675 // src nodes must be replaced by tgt nodes to have tgt nodes in _simplices
6676 _Simplex::GetSimplices( n, nodesToSmooth[ i ]._simplices, ignoreShapes, 0, sortSimplices);
6677 // fix up incorrect uv of nodes on the FACE
6678 helper.GetNodeUV( F, n, 0, &isOkUV);
6683 //if ( nodesToSmooth.empty() ) continue;
6685 // Find EDGE's to shrink and set simpices to LayerEdge's
6686 set< _Shrinker1D* > eShri1D;
6688 for ( size_t iS = 0; iS < subEOS.size(); ++iS )
6690 _EdgesOnShape& eos = * subEOS[ iS ];
6691 if ( eos.SWOLType() == TopAbs_EDGE )
6693 SMESH_subMesh* edgeSM = _mesh->GetSubMesh( eos._sWOL );
6694 _Shrinker1D& srinker = e2shrMap[ edgeSM->GetId() ];
6695 eShri1D.insert( & srinker );
6696 srinker.AddEdge( eos._edges[0], eos, helper );
6697 VISCOUS_3D::ToClearSubWithMain( edgeSM, data._solid );
6698 // restore params of nodes on EGDE if the EDGE has been already
6699 // srinked while srinking other FACE
6700 srinker.RestoreParams();
6702 for ( size_t i = 0; i < eos._edges.size(); ++i )
6704 _LayerEdge& edge = * eos._edges[i];
6705 _Simplex::GetSimplices( /*tgtNode=*/edge._nodes.back(), edge._simplices, ignoreShapes );
6710 bool toFixTria = false; // to improve quality of trias by diagonal swap
6711 if ( isConcaveFace )
6713 const bool hasTria = _mesh->NbTriangles(), hasQuad = _mesh->NbQuadrangles();
6714 if ( hasTria != hasQuad ) {
6715 toFixTria = hasTria;
6718 set<int> nbNodesSet;
6719 SMDS_ElemIteratorPtr fIt = smDS->GetElements();
6720 while ( fIt->more() && nbNodesSet.size() < 2 )
6721 nbNodesSet.insert( fIt->next()->NbCornerNodes() );
6722 toFixTria = ( *nbNodesSet.begin() == 3 );
6726 // ==================
6727 // Perform shrinking
6728 // ==================
6730 bool shrinked = true;
6731 int badNb, shriStep=0, smooStep=0;
6732 _SmoothNode::SmoothType smoothType
6733 = isConcaveFace ? _SmoothNode::ANGULAR : _SmoothNode::LAPLACIAN;
6737 // Move boundary nodes (actually just set new UV)
6738 // -----------------------------------------------
6739 dumpFunction(SMESH_Comment("moveBoundaryOnF")<<f2sd->first<<"_st"<<shriStep ); // debug
6741 for ( size_t iS = 0; iS < subEOS.size(); ++iS )
6743 _EdgesOnShape& eos = * subEOS[ iS ];
6744 for ( size_t i = 0; i < eos._edges.size(); ++i )
6746 shrinked |= eos._edges[i]->SetNewLength2d( surface, F, eos, helper );
6751 // Move nodes on EDGE's
6752 // (XYZ is set as soon as a needed length reached in SetNewLength2d())
6753 set< _Shrinker1D* >::iterator shr = eShri1D.begin();
6754 for ( ; shr != eShri1D.end(); ++shr )
6755 (*shr)->Compute( /*set3D=*/false, helper );
6758 // -----------------
6759 int nbNoImpSteps = 0;
6762 while (( nbNoImpSteps < 5 && badNb > 0) && moved)
6764 dumpFunction(SMESH_Comment("shrinkFace")<<f2sd->first<<"_st"<<++smooStep); // debug
6766 int oldBadNb = badNb;
6769 // '% 5' minimizes NB FUNCTIONS on viscous_layers_00/B2 case
6770 _SmoothNode::SmoothType smooTy = ( smooStep % 5 ) ? smoothType : _SmoothNode::LAPLACIAN;
6771 for ( size_t i = 0; i < nodesToSmooth.size(); ++i )
6773 moved |= nodesToSmooth[i].Smooth( badNb, surface, helper, refSign,
6774 smooTy, /*set3D=*/isConcaveFace);
6776 if ( badNb < oldBadNb )
6784 return error(SMESH_Comment("Can't shrink 2D mesh on face ") << f2sd->first );
6785 if ( shriStep > 200 )
6786 return error(SMESH_Comment("Infinite loop at shrinking 2D mesh on face ") << f2sd->first );
6788 // Fix narrow triangles by swapping diagonals
6789 // ---------------------------------------
6792 set<const SMDS_MeshNode*> usedNodes;
6793 fixBadFaces( F, helper, /*is2D=*/true, shriStep, & usedNodes); // swap diagonals
6795 // update working data
6796 set<const SMDS_MeshNode*>::iterator n;
6797 for ( size_t i = 0; i < nodesToSmooth.size() && !usedNodes.empty(); ++i )
6799 n = usedNodes.find( nodesToSmooth[ i ]._node );
6800 if ( n != usedNodes.end())
6802 _Simplex::GetSimplices( nodesToSmooth[ i ]._node,
6803 nodesToSmooth[ i ]._simplices,
6805 /*sortSimplices=*/ smoothType == _SmoothNode::ANGULAR );
6806 usedNodes.erase( n );
6809 for ( size_t i = 0; i < lEdges.size() && !usedNodes.empty(); ++i )
6811 n = usedNodes.find( /*tgtNode=*/ lEdges[i]->_nodes.back() );
6812 if ( n != usedNodes.end())
6814 _Simplex::GetSimplices( lEdges[i]->_nodes.back(),
6815 lEdges[i]->_simplices,
6817 usedNodes.erase( n );
6821 // TODO: check effect of this additional smooth
6822 // additional laplacian smooth to increase allowed shrink step
6823 // for ( int st = 1; st; --st )
6825 // dumpFunction(SMESH_Comment("shrinkFace")<<f2sd->first<<"_st"<<++smooStep); // debug
6826 // for ( size_t i = 0; i < nodesToSmooth.size(); ++i )
6828 // nodesToSmooth[i].Smooth( badNb,surface,helper,refSign,
6829 // _SmoothNode::LAPLACIAN,/*set3D=*/false);
6832 } // while ( shrinked )
6834 // No wrongly shaped faces remain; final smooth. Set node XYZ.
6835 bool isStructuredFixed = false;
6836 if ( SMESH_2D_Algo* algo = dynamic_cast<SMESH_2D_Algo*>( sm->GetAlgo() ))
6837 isStructuredFixed = algo->FixInternalNodes( *data._proxyMesh, F );
6838 if ( !isStructuredFixed )
6840 if ( isConcaveFace ) // fix narrow faces by swapping diagonals
6841 fixBadFaces( F, helper, /*is2D=*/false, ++shriStep );
6843 for ( int st = 3; st; --st )
6846 case 1: smoothType = _SmoothNode::LAPLACIAN; break;
6847 case 2: smoothType = _SmoothNode::LAPLACIAN; break;
6848 case 3: smoothType = _SmoothNode::ANGULAR; break;
6850 dumpFunction(SMESH_Comment("shrinkFace")<<f2sd->first<<"_st"<<++smooStep); // debug
6851 for ( size_t i = 0; i < nodesToSmooth.size(); ++i )
6853 nodesToSmooth[i].Smooth( badNb,surface,helper,refSign,
6854 smoothType,/*set3D=*/st==1 );
6859 // Set an event listener to clear FACE sub-mesh together with SOLID sub-mesh
6860 VISCOUS_3D::ToClearSubWithMain( sm, data._solid );
6862 if ( !getMeshDS()->IsEmbeddedMode() )
6863 // Log node movement
6864 for ( size_t i = 0; i < nodesToSmooth.size(); ++i )
6866 SMESH_TNodeXYZ p ( nodesToSmooth[i]._node );
6867 getMeshDS()->MoveNode( nodesToSmooth[i]._node, p.X(), p.Y(), p.Z() );
6870 } // loop on FACES to srink mesh on
6873 // Replace source nodes by target nodes in shrinked mesh edges
6875 map< int, _Shrinker1D >::iterator e2shr = e2shrMap.begin();
6876 for ( ; e2shr != e2shrMap.end(); ++e2shr )
6877 e2shr->second.SwapSrcTgtNodes( getMeshDS() );
6882 //================================================================================
6884 * \brief Computes 2d shrink direction and finds nodes limiting shrinking
6886 //================================================================================
6888 bool _ViscousBuilder::prepareEdgeToShrink( _LayerEdge& edge,
6890 SMESH_MesherHelper& helper,
6891 const SMESHDS_SubMesh* faceSubMesh)
6893 const SMDS_MeshNode* srcNode = edge._nodes[0];
6894 const SMDS_MeshNode* tgtNode = edge._nodes.back();
6896 if ( eos.SWOLType() == TopAbs_FACE )
6898 gp_XY srcUV ( edge._pos[0].X(), edge._pos[0].Y() ); //helper.GetNodeUV( F, srcNode );
6899 gp_XY tgtUV = edge.LastUV( TopoDS::Face( eos._sWOL ), eos ); //helper.GetNodeUV( F, tgtNode );
6900 gp_Vec2d uvDir( srcUV, tgtUV );
6901 double uvLen = uvDir.Magnitude();
6903 edge._normal.SetCoord( uvDir.X(),uvDir.Y(), 0 );
6906 edge._pos.resize(1);
6907 edge._pos[0].SetCoord( tgtUV.X(), tgtUV.Y(), 0 );
6909 // set UV of source node to target node
6910 SMDS_FacePosition* pos = static_cast<SMDS_FacePosition*>( tgtNode->GetPosition() );
6911 pos->SetUParameter( srcUV.X() );
6912 pos->SetVParameter( srcUV.Y() );
6914 else // _sWOL is TopAbs_EDGE
6916 const TopoDS_Edge& E = TopoDS::Edge( eos._sWOL );
6917 SMESHDS_SubMesh* edgeSM = getMeshDS()->MeshElements( E );
6918 if ( !edgeSM || edgeSM->NbElements() == 0 )
6919 return error(SMESH_Comment("Not meshed EDGE ") << getMeshDS()->ShapeToIndex( E ));
6921 const SMDS_MeshNode* n2 = 0;
6922 SMDS_ElemIteratorPtr eIt = srcNode->GetInverseElementIterator(SMDSAbs_Edge);
6923 while ( eIt->more() && !n2 )
6925 const SMDS_MeshElement* e = eIt->next();
6926 if ( !edgeSM->Contains(e)) continue;
6927 n2 = e->GetNode( 0 );
6928 if ( n2 == srcNode ) n2 = e->GetNode( 1 );
6931 return error(SMESH_Comment("Wrongly meshed EDGE ") << getMeshDS()->ShapeToIndex( E ));
6933 double uSrc = helper.GetNodeU( E, srcNode, n2 );
6934 double uTgt = helper.GetNodeU( E, tgtNode, srcNode );
6935 double u2 = helper.GetNodeU( E, n2, srcNode );
6939 if ( fabs( uSrc-uTgt ) < 0.99 * fabs( uSrc-u2 ))
6941 // tgtNode is located so that it does not make faces with wrong orientation
6944 edge._pos.resize(1);
6945 edge._pos[0].SetCoord( U_TGT, uTgt );
6946 edge._pos[0].SetCoord( U_SRC, uSrc );
6947 edge._pos[0].SetCoord( LEN_TGT, fabs( uSrc-uTgt ));
6949 edge._simplices.resize( 1 );
6950 edge._simplices[0]._nPrev = n2;
6952 // set U of source node to the target node
6953 SMDS_EdgePosition* pos = static_cast<SMDS_EdgePosition*>( tgtNode->GetPosition() );
6954 pos->SetUParameter( uSrc );
6959 //================================================================================
6961 * \brief Restore position of a sole node of a _LayerEdge based on _noShrinkShapes
6963 //================================================================================
6965 void _ViscousBuilder::restoreNoShrink( _LayerEdge& edge ) const
6967 if ( edge._nodes.size() == 1 )
6972 const SMDS_MeshNode* srcNode = edge._nodes[0];
6973 TopoDS_Shape S = SMESH_MesherHelper::GetSubShapeByNode( srcNode, getMeshDS() );
6974 if ( S.IsNull() ) return;
6978 switch ( S.ShapeType() )
6983 TopLoc_Location loc;
6984 Handle(Geom_Curve) curve = BRep_Tool::Curve( TopoDS::Edge( S ), loc, f, l );
6985 if ( curve.IsNull() ) return;
6986 SMDS_EdgePosition* ePos = static_cast<SMDS_EdgePosition*>( srcNode->GetPosition() );
6987 p = curve->Value( ePos->GetUParameter() );
6992 p = BRep_Tool::Pnt( TopoDS::Vertex( S ));
6997 getMeshDS()->MoveNode( srcNode, p.X(), p.Y(), p.Z() );
6998 dumpMove( srcNode );
7002 //================================================================================
7004 * \brief Try to fix triangles with high aspect ratio by swaping diagonals
7006 //================================================================================
7008 void _ViscousBuilder::fixBadFaces(const TopoDS_Face& F,
7009 SMESH_MesherHelper& helper,
7012 set<const SMDS_MeshNode*> * involvedNodes)
7014 SMESH::Controls::AspectRatio qualifier;
7015 SMESH::Controls::TSequenceOfXYZ points(3), points1(3), points2(3);
7016 const double maxAspectRatio = is2D ? 4. : 2;
7017 _NodeCoordHelper xyz( F, helper, is2D );
7019 // find bad triangles
7021 vector< const SMDS_MeshElement* > badTrias;
7022 vector< double > badAspects;
7023 SMESHDS_SubMesh* sm = helper.GetMeshDS()->MeshElements( F );
7024 SMDS_ElemIteratorPtr fIt = sm->GetElements();
7025 while ( fIt->more() )
7027 const SMDS_MeshElement * f = fIt->next();
7028 if ( f->NbCornerNodes() != 3 ) continue;
7029 for ( int iP = 0; iP < 3; ++iP ) points(iP+1) = xyz( f->GetNode(iP));
7030 double aspect = qualifier.GetValue( points );
7031 if ( aspect > maxAspectRatio )
7033 badTrias.push_back( f );
7034 badAspects.push_back( aspect );
7039 dumpFunction(SMESH_Comment("beforeSwapDiagonals_F")<<helper.GetSubShapeID());
7040 SMDS_ElemIteratorPtr fIt = sm->GetElements();
7041 while ( fIt->more() )
7043 const SMDS_MeshElement * f = fIt->next();
7044 if ( f->NbCornerNodes() == 3 )
7045 dumpChangeNodes( f );
7049 if ( badTrias.empty() )
7052 // find couples of faces to swap diagonal
7054 typedef pair < const SMDS_MeshElement* , const SMDS_MeshElement* > T2Trias;
7055 vector< T2Trias > triaCouples;
7057 TIDSortedElemSet involvedFaces, emptySet;
7058 for ( size_t iTia = 0; iTia < badTrias.size(); ++iTia )
7061 double aspRatio [3];
7064 if ( !involvedFaces.insert( badTrias[iTia] ).second )
7066 for ( int iP = 0; iP < 3; ++iP )
7067 points(iP+1) = xyz( badTrias[iTia]->GetNode(iP));
7069 // find triangles adjacent to badTrias[iTia] with better aspect ratio after diag-swaping
7070 int bestCouple = -1;
7071 for ( int iSide = 0; iSide < 3; ++iSide )
7073 const SMDS_MeshNode* n1 = badTrias[iTia]->GetNode( iSide );
7074 const SMDS_MeshNode* n2 = badTrias[iTia]->GetNode(( iSide+1 ) % 3 );
7075 trias [iSide].first = badTrias[iTia];
7076 trias [iSide].second = SMESH_MeshAlgos::FindFaceInSet( n1, n2, emptySet, involvedFaces,
7078 if (( ! trias[iSide].second ) ||
7079 ( trias[iSide].second->NbCornerNodes() != 3 ) ||
7080 ( ! sm->Contains( trias[iSide].second )))
7083 // aspect ratio of an adjacent tria
7084 for ( int iP = 0; iP < 3; ++iP )
7085 points2(iP+1) = xyz( trias[iSide].second->GetNode(iP));
7086 double aspectInit = qualifier.GetValue( points2 );
7088 // arrange nodes as after diag-swaping
7089 if ( helper.WrapIndex( i1+1, 3 ) == i2 )
7090 i3 = helper.WrapIndex( i1-1, 3 );
7092 i3 = helper.WrapIndex( i1+1, 3 );
7094 points1( 1+ iSide ) = points2( 1+ i3 );
7095 points2( 1+ i2 ) = points1( 1+ ( iSide+2 ) % 3 );
7097 // aspect ratio after diag-swaping
7098 aspRatio[ iSide ] = qualifier.GetValue( points1 ) + qualifier.GetValue( points2 );
7099 if ( aspRatio[ iSide ] > aspectInit + badAspects[ iTia ] )
7102 // prevent inversion of a triangle
7103 gp_Vec norm1 = gp_Vec( points1(1), points1(3) ) ^ gp_Vec( points1(1), points1(2) );
7104 gp_Vec norm2 = gp_Vec( points2(1), points2(3) ) ^ gp_Vec( points2(1), points2(2) );
7105 if ( norm1 * norm2 < 0. && norm1.Angle( norm2 ) > 70./180.*M_PI )
7108 if ( bestCouple < 0 || aspRatio[ bestCouple ] > aspRatio[ iSide ] )
7112 if ( bestCouple >= 0 )
7114 triaCouples.push_back( trias[bestCouple] );
7115 involvedFaces.insert ( trias[bestCouple].second );
7119 involvedFaces.erase( badTrias[iTia] );
7122 if ( triaCouples.empty() )
7127 SMESH_MeshEditor editor( helper.GetMesh() );
7128 dumpFunction(SMESH_Comment("beforeSwapDiagonals_F")<<helper.GetSubShapeID()<<"_"<<step);
7129 for ( size_t i = 0; i < triaCouples.size(); ++i )
7131 dumpChangeNodes( triaCouples[i].first );
7132 dumpChangeNodes( triaCouples[i].second );
7133 editor.InverseDiag( triaCouples[i].first, triaCouples[i].second );
7136 if ( involvedNodes )
7137 for ( size_t i = 0; i < triaCouples.size(); ++i )
7139 involvedNodes->insert( triaCouples[i].first->begin_nodes(),
7140 triaCouples[i].first->end_nodes() );
7141 involvedNodes->insert( triaCouples[i].second->begin_nodes(),
7142 triaCouples[i].second->end_nodes() );
7145 // just for debug dump resulting triangles
7146 dumpFunction(SMESH_Comment("swapDiagonals_F")<<helper.GetSubShapeID()<<"_"<<step);
7147 for ( size_t i = 0; i < triaCouples.size(); ++i )
7149 dumpChangeNodes( triaCouples[i].first );
7150 dumpChangeNodes( triaCouples[i].second );
7154 //================================================================================
7156 * \brief Move target node to it's final position on the FACE during shrinking
7158 //================================================================================
7160 bool _LayerEdge::SetNewLength2d( Handle(Geom_Surface)& surface,
7161 const TopoDS_Face& F,
7163 SMESH_MesherHelper& helper )
7166 return false; // already at the target position
7168 SMDS_MeshNode* tgtNode = const_cast< SMDS_MeshNode*& >( _nodes.back() );
7170 if ( eos.SWOLType() == TopAbs_FACE )
7172 gp_XY curUV = helper.GetNodeUV( F, tgtNode );
7173 gp_Pnt2d tgtUV( _pos[0].X(), _pos[0].Y() );
7174 gp_Vec2d uvDir( _normal.X(), _normal.Y() );
7175 const double uvLen = tgtUV.Distance( curUV );
7176 const double kSafe = Max( 0.5, 1. - 0.1 * _simplices.size() );
7178 // Select shrinking step such that not to make faces with wrong orientation.
7179 double stepSize = 1e100;
7180 for ( size_t i = 0; i < _simplices.size(); ++i )
7182 // find intersection of 2 lines: curUV-tgtUV and that connecting simplex nodes
7183 gp_XY uvN1 = helper.GetNodeUV( F, _simplices[i]._nPrev );
7184 gp_XY uvN2 = helper.GetNodeUV( F, _simplices[i]._nNext );
7185 gp_XY dirN = uvN2 - uvN1;
7186 double det = uvDir.Crossed( dirN );
7187 if ( Abs( det ) < std::numeric_limits<double>::min() ) continue;
7188 gp_XY dirN2Cur = curUV - uvN1;
7189 double step = dirN.Crossed( dirN2Cur ) / det;
7191 stepSize = Min( step, stepSize );
7194 if ( uvLen <= stepSize )
7199 else if ( stepSize > 0 )
7201 newUV = curUV + uvDir.XY() * stepSize * kSafe;
7207 SMDS_FacePosition* pos = static_cast<SMDS_FacePosition*>( tgtNode->GetPosition() );
7208 pos->SetUParameter( newUV.X() );
7209 pos->SetVParameter( newUV.Y() );
7212 gp_Pnt p = surface->Value( newUV.X(), newUV.Y() );
7213 tgtNode->setXYZ( p.X(), p.Y(), p.Z() );
7214 dumpMove( tgtNode );
7217 else // _sWOL is TopAbs_EDGE
7219 const TopoDS_Edge& E = TopoDS::Edge( eos._sWOL );
7220 const SMDS_MeshNode* n2 = _simplices[0]._nPrev;
7221 SMDS_EdgePosition* tgtPos = static_cast<SMDS_EdgePosition*>( tgtNode->GetPosition() );
7223 const double u2 = helper.GetNodeU( E, n2, tgtNode );
7224 const double uSrc = _pos[0].Coord( U_SRC );
7225 const double lenTgt = _pos[0].Coord( LEN_TGT );
7227 double newU = _pos[0].Coord( U_TGT );
7228 if ( lenTgt < 0.99 * fabs( uSrc-u2 )) // n2 got out of src-tgt range
7234 newU = 0.1 * tgtPos->GetUParameter() + 0.9 * u2;
7236 tgtPos->SetUParameter( newU );
7238 gp_XY newUV = helper.GetNodeUV( F, tgtNode, _nodes[0]);
7239 gp_Pnt p = surface->Value( newUV.X(), newUV.Y() );
7240 tgtNode->setXYZ( p.X(), p.Y(), p.Z() );
7241 dumpMove( tgtNode );
7247 //================================================================================
7249 * \brief Perform smooth on the FACE
7250 * \retval bool - true if the node has been moved
7252 //================================================================================
7254 bool _SmoothNode::Smooth(int& badNb,
7255 Handle(Geom_Surface)& surface,
7256 SMESH_MesherHelper& helper,
7257 const double refSign,
7261 const TopoDS_Face& face = TopoDS::Face( helper.GetSubShape() );
7263 // get uv of surrounding nodes
7264 vector<gp_XY> uv( _simplices.size() );
7265 for ( size_t i = 0; i < _simplices.size(); ++i )
7266 uv[i] = helper.GetNodeUV( face, _simplices[i]._nPrev, _node );
7268 // compute new UV for the node
7270 if ( how == TFI && _simplices.size() == 4 )
7273 for ( size_t i = 0; i < _simplices.size(); ++i )
7274 if ( _simplices[i]._nOpp )
7275 corners[i] = helper.GetNodeUV( face, _simplices[i]._nOpp, _node );
7277 throw SALOME_Exception(LOCALIZED("TFI smoothing: _Simplex::_nOpp not set!"));
7279 newPos = helper.calcTFI ( 0.5, 0.5,
7280 corners[0], corners[1], corners[2], corners[3],
7281 uv[1], uv[2], uv[3], uv[0] );
7283 else if ( how == ANGULAR )
7285 newPos = computeAngularPos( uv, helper.GetNodeUV( face, _node ), refSign );
7287 else if ( how == CENTROIDAL && _simplices.size() > 3 )
7289 // average centers of diagonals wieghted with their reciprocal lengths
7290 if ( _simplices.size() == 4 )
7292 double w1 = 1. / ( uv[2]-uv[0] ).SquareModulus();
7293 double w2 = 1. / ( uv[3]-uv[1] ).SquareModulus();
7294 newPos = ( w1 * ( uv[2]+uv[0] ) + w2 * ( uv[3]+uv[1] )) / ( w1+w2 ) / 2;
7298 double sumWeight = 0;
7299 int nb = _simplices.size() == 4 ? 2 : _simplices.size();
7300 for ( int i = 0; i < nb; ++i )
7303 int iTo = i + _simplices.size() - 1;
7304 for ( int j = iFrom; j < iTo; ++j )
7306 int i2 = SMESH_MesherHelper::WrapIndex( j, _simplices.size() );
7307 double w = 1. / ( uv[i]-uv[i2] ).SquareModulus();
7309 newPos += w * ( uv[i]+uv[i2] );
7312 newPos /= 2 * sumWeight; // 2 is to get a middle between uv's
7318 for ( size_t i = 0; i < _simplices.size(); ++i )
7320 newPos /= _simplices.size();
7323 // count quality metrics (orientation) of triangles around the node
7325 gp_XY tgtUV = helper.GetNodeUV( face, _node );
7326 for ( size_t i = 0; i < _simplices.size(); ++i )
7327 nbOkBefore += _simplices[i].IsForward( tgtUV, _node, face, helper, refSign );
7330 for ( size_t i = 0; i < _simplices.size(); ++i )
7331 nbOkAfter += _simplices[i].IsForward( newPos, _node, face, helper, refSign );
7333 if ( nbOkAfter < nbOkBefore )
7335 badNb += _simplices.size() - nbOkBefore;
7339 SMDS_FacePosition* pos = static_cast<SMDS_FacePosition*>( _node->GetPosition() );
7340 pos->SetUParameter( newPos.X() );
7341 pos->SetVParameter( newPos.Y() );
7348 gp_Pnt p = surface->Value( newPos.X(), newPos.Y() );
7349 const_cast< SMDS_MeshNode* >( _node )->setXYZ( p.X(), p.Y(), p.Z() );
7353 badNb += _simplices.size() - nbOkAfter;
7354 return ( (tgtUV-newPos).SquareModulus() > 1e-10 );
7357 //================================================================================
7359 * \brief Computes new UV using angle based smoothing technic
7361 //================================================================================
7363 gp_XY _SmoothNode::computeAngularPos(vector<gp_XY>& uv,
7364 const gp_XY& uvToFix,
7365 const double refSign)
7367 uv.push_back( uv.front() );
7369 vector< gp_XY > edgeDir ( uv.size() );
7370 vector< double > edgeSize( uv.size() );
7371 for ( size_t i = 1; i < edgeDir.size(); ++i )
7373 edgeDir [i-1] = uv[i] - uv[i-1];
7374 edgeSize[i-1] = edgeDir[i-1].Modulus();
7375 if ( edgeSize[i-1] < numeric_limits<double>::min() )
7376 edgeDir[i-1].SetX( 100 );
7378 edgeDir[i-1] /= edgeSize[i-1] * refSign;
7380 edgeDir.back() = edgeDir.front();
7381 edgeSize.back() = edgeSize.front();
7386 for ( size_t i = 1; i < edgeDir.size(); ++i )
7388 if ( edgeDir[i-1].X() > 1. ) continue;
7390 while ( edgeDir[i].X() > 1. && ++i < edgeDir.size() );
7391 if ( i == edgeDir.size() ) break;
7393 gp_XY norm1( -edgeDir[i1].Y(), edgeDir[i1].X() );
7394 gp_XY norm2( -edgeDir[i].Y(), edgeDir[i].X() );
7395 gp_XY bisec = norm1 + norm2;
7396 double bisecSize = bisec.Modulus();
7397 if ( bisecSize < numeric_limits<double>::min() )
7399 bisec = -edgeDir[i1] + edgeDir[i];
7400 bisecSize = bisec.Modulus();
7404 gp_XY dirToN = uvToFix - p;
7405 double distToN = dirToN.Modulus();
7406 if ( bisec * dirToN < 0 )
7409 newPos += ( p + bisec * distToN ) * ( edgeSize[i1] + edgeSize[i] );
7411 sumSize += edgeSize[i1] + edgeSize[i];
7413 newPos /= /*nbEdges * */sumSize;
7417 //================================================================================
7419 * \brief Delete _SolidData
7421 //================================================================================
7423 _SolidData::~_SolidData()
7425 TNode2Edge::iterator n2e = _n2eMap.begin();
7426 for ( ; n2e != _n2eMap.end(); ++n2e )
7428 _LayerEdge* & e = n2e->second;
7429 if ( e && e->_2neibors )
7430 delete e->_2neibors;
7436 //================================================================================
7438 * \brief Keep a _LayerEdge inflated along the EDGE
7440 //================================================================================
7442 void _Shrinker1D::AddEdge( const _LayerEdge* e,
7444 SMESH_MesherHelper& helper )
7447 if ( _nodes.empty() )
7449 _edges[0] = _edges[1] = 0;
7453 if ( e == _edges[0] || e == _edges[1] )
7455 if ( eos.SWOLType() != TopAbs_EDGE )
7456 throw SALOME_Exception(LOCALIZED("Wrong _LayerEdge is added"));
7457 if ( _edges[0] && !_geomEdge.IsSame( eos._sWOL ))
7458 throw SALOME_Exception(LOCALIZED("Wrong _LayerEdge is added"));
7461 _geomEdge = TopoDS::Edge( eos._sWOL );
7463 BRep_Tool::Range( _geomEdge, f,l );
7464 double u = helper.GetNodeU( _geomEdge, e->_nodes[0], e->_nodes.back());
7465 _edges[ u < 0.5*(f+l) ? 0 : 1 ] = e;
7469 const SMDS_MeshNode* tgtNode0 = _edges[0] ? _edges[0]->_nodes.back() : 0;
7470 const SMDS_MeshNode* tgtNode1 = _edges[1] ? _edges[1]->_nodes.back() : 0;
7472 if ( _nodes.empty() )
7474 SMESHDS_SubMesh * eSubMesh = helper.GetMeshDS()->MeshElements( _geomEdge );
7475 if ( !eSubMesh || eSubMesh->NbNodes() < 1 )
7477 TopLoc_Location loc;
7478 Handle(Geom_Curve) C = BRep_Tool::Curve( _geomEdge, loc, f,l );
7479 GeomAdaptor_Curve aCurve(C, f,l);
7480 const double totLen = GCPnts_AbscissaPoint::Length(aCurve, f, l);
7482 int nbExpectNodes = eSubMesh->NbNodes();
7483 _initU .reserve( nbExpectNodes );
7484 _normPar.reserve( nbExpectNodes );
7485 _nodes .reserve( nbExpectNodes );
7486 SMDS_NodeIteratorPtr nIt = eSubMesh->GetNodes();
7487 while ( nIt->more() )
7489 const SMDS_MeshNode* node = nIt->next();
7490 if ( node->NbInverseElements(SMDSAbs_Edge) == 0 ||
7491 node == tgtNode0 || node == tgtNode1 )
7492 continue; // refinement nodes
7493 _nodes.push_back( node );
7494 _initU.push_back( helper.GetNodeU( _geomEdge, node ));
7495 double len = GCPnts_AbscissaPoint::Length(aCurve, f, _initU.back());
7496 _normPar.push_back( len / totLen );
7501 // remove target node of the _LayerEdge from _nodes
7503 for ( size_t i = 0; i < _nodes.size(); ++i )
7504 if ( !_nodes[i] || _nodes[i] == tgtNode0 || _nodes[i] == tgtNode1 )
7505 _nodes[i] = 0, nbFound++;
7506 if ( nbFound == _nodes.size() )
7511 //================================================================================
7513 * \brief Move nodes on EDGE from ends where _LayerEdge's are inflated
7515 //================================================================================
7517 void _Shrinker1D::Compute(bool set3D, SMESH_MesherHelper& helper)
7519 if ( _done || _nodes.empty())
7521 const _LayerEdge* e = _edges[0];
7522 if ( !e ) e = _edges[1];
7525 _done = (( !_edges[0] || _edges[0]->_pos.empty() ) &&
7526 ( !_edges[1] || _edges[1]->_pos.empty() ));
7529 if ( set3D || _done )
7531 Handle(Geom_Curve) C = BRep_Tool::Curve(_geomEdge, f,l);
7532 GeomAdaptor_Curve aCurve(C, f,l);
7535 f = helper.GetNodeU( _geomEdge, _edges[0]->_nodes.back(), _nodes[0] );
7537 l = helper.GetNodeU( _geomEdge, _edges[1]->_nodes.back(), _nodes.back() );
7538 double totLen = GCPnts_AbscissaPoint::Length( aCurve, f, l );
7540 for ( size_t i = 0; i < _nodes.size(); ++i )
7542 if ( !_nodes[i] ) continue;
7543 double len = totLen * _normPar[i];
7544 GCPnts_AbscissaPoint discret( aCurve, len, f );
7545 if ( !discret.IsDone() )
7546 return throw SALOME_Exception(LOCALIZED("GCPnts_AbscissaPoint failed"));
7547 double u = discret.Parameter();
7548 SMDS_EdgePosition* pos = static_cast<SMDS_EdgePosition*>( _nodes[i]->GetPosition() );
7549 pos->SetUParameter( u );
7550 gp_Pnt p = C->Value( u );
7551 const_cast< SMDS_MeshNode*>( _nodes[i] )->setXYZ( p.X(), p.Y(), p.Z() );
7556 BRep_Tool::Range( _geomEdge, f,l );
7558 f = helper.GetNodeU( _geomEdge, _edges[0]->_nodes.back(), _nodes[0] );
7560 l = helper.GetNodeU( _geomEdge, _edges[1]->_nodes.back(), _nodes.back() );
7562 for ( size_t i = 0; i < _nodes.size(); ++i )
7564 if ( !_nodes[i] ) continue;
7565 double u = f * ( 1-_normPar[i] ) + l * _normPar[i];
7566 SMDS_EdgePosition* pos = static_cast<SMDS_EdgePosition*>( _nodes[i]->GetPosition() );
7567 pos->SetUParameter( u );
7572 //================================================================================
7574 * \brief Restore initial parameters of nodes on EDGE
7576 //================================================================================
7578 void _Shrinker1D::RestoreParams()
7581 for ( size_t i = 0; i < _nodes.size(); ++i )
7583 if ( !_nodes[i] ) continue;
7584 SMDS_EdgePosition* pos = static_cast<SMDS_EdgePosition*>( _nodes[i]->GetPosition() );
7585 pos->SetUParameter( _initU[i] );
7590 //================================================================================
7592 * \brief Replace source nodes by target nodes in shrinked mesh edges
7594 //================================================================================
7596 void _Shrinker1D::SwapSrcTgtNodes( SMESHDS_Mesh* mesh )
7598 const SMDS_MeshNode* nodes[3];
7599 for ( int i = 0; i < 2; ++i )
7601 if ( !_edges[i] ) continue;
7603 SMESHDS_SubMesh * eSubMesh = mesh->MeshElements( _geomEdge );
7604 if ( !eSubMesh ) return;
7605 const SMDS_MeshNode* srcNode = _edges[i]->_nodes[0];
7606 const SMDS_MeshNode* tgtNode = _edges[i]->_nodes.back();
7607 SMDS_ElemIteratorPtr eIt = srcNode->GetInverseElementIterator(SMDSAbs_Edge);
7608 while ( eIt->more() )
7610 const SMDS_MeshElement* e = eIt->next();
7611 if ( !eSubMesh->Contains( e ))
7613 SMDS_ElemIteratorPtr nIt = e->nodesIterator();
7614 for ( int iN = 0; iN < e->NbNodes(); ++iN )
7616 const SMDS_MeshNode* n = static_cast<const SMDS_MeshNode*>( nIt->next() );
7617 nodes[iN] = ( n == srcNode ? tgtNode : n );
7619 mesh->ChangeElementNodes( e, nodes, e->NbNodes() );
7624 //================================================================================
7626 * \brief Creates 2D and 1D elements on boundaries of new prisms
7628 //================================================================================
7630 bool _ViscousBuilder::addBoundaryElements()
7632 SMESH_MesherHelper helper( *_mesh );
7634 vector< const SMDS_MeshNode* > faceNodes;
7636 for ( size_t i = 0; i < _sdVec.size(); ++i )
7638 _SolidData& data = _sdVec[i];
7639 TopTools_IndexedMapOfShape geomEdges;
7640 TopExp::MapShapes( data._solid, TopAbs_EDGE, geomEdges );
7641 for ( int iE = 1; iE <= geomEdges.Extent(); ++iE )
7643 const TopoDS_Edge& E = TopoDS::Edge( geomEdges(iE));
7644 if ( data._noShrinkShapes.count( getMeshDS()->ShapeToIndex( E )))
7647 // Get _LayerEdge's based on E
7649 map< double, const SMDS_MeshNode* > u2nodes;
7650 if ( !SMESH_Algo::GetSortedNodesOnEdge( getMeshDS(), E, /*ignoreMedium=*/false, u2nodes))
7653 vector< _LayerEdge* > ledges; ledges.reserve( u2nodes.size() );
7654 TNode2Edge & n2eMap = data._n2eMap;
7655 map< double, const SMDS_MeshNode* >::iterator u2n = u2nodes.begin();
7657 //check if 2D elements are needed on E
7658 TNode2Edge::iterator n2e = n2eMap.find( u2n->second );
7659 if ( n2e == n2eMap.end() ) continue; // no layers on vertex
7660 ledges.push_back( n2e->second );
7662 if (( n2e = n2eMap.find( u2n->second )) == n2eMap.end() )
7663 continue; // no layers on E
7664 ledges.push_back( n2eMap[ u2n->second ]);
7666 const SMDS_MeshNode* tgtN0 = ledges[0]->_nodes.back();
7667 const SMDS_MeshNode* tgtN1 = ledges[1]->_nodes.back();
7668 int nbSharedPyram = 0;
7669 SMDS_ElemIteratorPtr vIt = tgtN0->GetInverseElementIterator(SMDSAbs_Volume);
7670 while ( vIt->more() )
7672 const SMDS_MeshElement* v = vIt->next();
7673 nbSharedPyram += int( v->GetNodeIndex( tgtN1 ) >= 0 );
7675 if ( nbSharedPyram > 1 )
7676 continue; // not free border of the pyramid
7679 faceNodes.push_back( ledges[0]->_nodes[0] );
7680 faceNodes.push_back( ledges[1]->_nodes[0] );
7681 if ( ledges[0]->_nodes.size() > 1 ) faceNodes.push_back( ledges[0]->_nodes[1] );
7682 if ( ledges[1]->_nodes.size() > 1 ) faceNodes.push_back( ledges[1]->_nodes[1] );
7684 if ( getMeshDS()->FindElement( faceNodes, SMDSAbs_Face, /*noMedium=*/true))
7685 continue; // faces already created
7687 for ( ++u2n; u2n != u2nodes.end(); ++u2n )
7688 ledges.push_back( n2eMap[ u2n->second ]);
7690 // Find out orientation and type of face to create
7692 bool reverse = false, isOnFace;
7694 map< TGeomID, TopoDS_Shape >::iterator e2f =
7695 data._shrinkShape2Shape.find( getMeshDS()->ShapeToIndex( E ));
7697 if (( isOnFace = ( e2f != data._shrinkShape2Shape.end() )))
7699 F = e2f->second.Oriented( TopAbs_FORWARD );
7700 reverse = ( helper.GetSubShapeOri( F, E ) == TopAbs_REVERSED );
7701 if ( helper.GetSubShapeOri( data._solid, F ) == TopAbs_REVERSED )
7702 reverse = !reverse, F.Reverse();
7703 if ( helper.IsReversedSubMesh( TopoDS::Face(F) ))
7708 // find FACE with layers sharing E
7709 PShapeIteratorPtr fIt = helper.GetAncestors( E, *_mesh, TopAbs_FACE );
7710 while ( fIt->more() && F.IsNull() )
7712 const TopoDS_Shape* pF = fIt->next();
7713 if ( helper.IsSubShape( *pF, data._solid) &&
7714 !data._ignoreFaceIds.count( e2f->first ))
7718 // Find the sub-mesh to add new faces
7719 SMESHDS_SubMesh* sm = 0;
7721 sm = getMeshDS()->MeshElements( F );
7723 sm = data._proxyMesh->getFaceSubM( TopoDS::Face(F), /*create=*/true );
7725 return error("error in addBoundaryElements()", data._index);
7728 const int dj1 = reverse ? 0 : 1;
7729 const int dj2 = reverse ? 1 : 0;
7730 for ( size_t j = 1; j < ledges.size(); ++j )
7732 vector< const SMDS_MeshNode*>& nn1 = ledges[j-dj1]->_nodes;
7733 vector< const SMDS_MeshNode*>& nn2 = ledges[j-dj2]->_nodes;
7734 if ( nn1.size() == nn2.size() )
7737 for ( size_t z = 1; z < nn1.size(); ++z )
7738 sm->AddElement( getMeshDS()->AddFace( nn1[z-1], nn2[z-1], nn2[z], nn1[z] ));
7740 for ( size_t z = 1; z < nn1.size(); ++z )
7741 sm->AddElement( new SMDS_FaceOfNodes( nn1[z-1], nn2[z-1], nn2[z], nn1[z] ));
7743 else if ( nn1.size() == 1 )
7746 for ( size_t z = 1; z < nn2.size(); ++z )
7747 sm->AddElement( getMeshDS()->AddFace( nn1[0], nn2[z-1], nn2[z] ));
7749 for ( size_t z = 1; z < nn2.size(); ++z )
7750 sm->AddElement( new SMDS_FaceOfNodes( nn1[0], nn2[z-1], nn2[z] ));
7755 for ( size_t z = 1; z < nn1.size(); ++z )
7756 sm->AddElement( getMeshDS()->AddFace( nn1[z-1], nn2[0], nn1[z] ));
7758 for ( size_t z = 1; z < nn1.size(); ++z )
7759 sm->AddElement( new SMDS_FaceOfNodes( nn1[z-1], nn2[0], nn2[z] ));
7764 for ( int isFirst = 0; isFirst < 2; ++isFirst )
7766 _LayerEdge* edge = isFirst ? ledges.front() : ledges.back();
7767 _EdgesOnShape* eos = data.GetShapeEdges( edge );
7768 if ( eos && eos->SWOLType() == TopAbs_EDGE )
7770 vector< const SMDS_MeshNode*>& nn = edge->_nodes;
7771 if ( nn.size() < 2 || nn[1]->GetInverseElementIterator( SMDSAbs_Edge )->more() )
7773 helper.SetSubShape( eos->_sWOL );
7774 helper.SetElementsOnShape( true );
7775 for ( size_t z = 1; z < nn.size(); ++z )
7776 helper.AddEdge( nn[z-1], nn[z] );
7781 } // loop on _SolidData's