1 // Copyright (C) 2007-2014 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();
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& eos = data._edgesOnShape[iS];
2375 if ( eos.ShapeType() != TopAbs_FACE ||
2376 data._ignoreFaceIds.count( eos._shapeID ))
2379 TopoDS_Face F = TopoDS::Face( eos._shape );
2380 SMESH_subMesh * sm = eos._subMesh;
2381 const TGeomID faceID = eos._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 ( _EdgesOnShape* 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 map< TGeomID, _EdgesOnShape* >::iterator id2oes = convFace._subIdToEOS.begin();
2462 for ( ; id2oes != convFace._subIdToEOS.end(); ++id2oes )
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
2924 SMDS_ElemIteratorPtr fIt = node->GetInverseElementIterator(SMDSAbs_Face);
2925 while ( fIt->more() )
2927 const SMDS_MeshElement* face = fIt->next();
2928 if ( eos.GetNormal( face, geomNorm ))
2930 edge._normal += geomNorm.XYZ();
2937 //if ( eos._hyp.UseSurfaceNormal() )
2939 switch ( eos.ShapeType() )
2946 TopoDS_Edge E = TopoDS::Edge( eos._shape );
2947 gp_Vec inFaceDir = getFaceDir( F, E, node, helper, normOK );
2948 double angle = inFaceDir.Angle( edge._normal ); // [0,PI]
2949 edge._cosin = Cos( angle );
2950 //cout << "Cosin on EDGE " << edge._cosin << " node " << node->GetID() << endl;
2953 case TopAbs_VERTEX: {
2954 if ( eos.SWOLType() != TopAbs_FACE ) { // else _cosin is set by getFaceDir()
2955 TopoDS_Vertex V = TopoDS::Vertex( eos._shape );
2956 gp_Vec inFaceDir = getFaceDir( F, V, node, helper, normOK );
2957 double angle = inFaceDir.Angle( edge._normal ); // [0,PI]
2958 edge._cosin = Cos( angle );
2959 if ( totalNbFaces > 2 || helper.IsSeamShape( node->getshapeId() ))
2960 for ( int iF = totalNbFaces-2; iF >=0; --iF )
2962 F = face2Norm[ iF ].first;
2963 inFaceDir = getFaceDir( F, V, node, helper, normOK=true );
2965 double angle = inFaceDir.Angle( edge._normal );
2966 edge._cosin = Max( edge._cosin, Cos( angle ));
2970 //cout << "Cosin on VERTEX " << edge._cosin << " node " << node->GetID() << endl;
2974 return error(SMESH_Comment("Invalid shape position of node ")<<node, data._index);
2978 double normSize = edge._normal.SquareModulus();
2979 if ( normSize < numeric_limits<double>::min() )
2980 return error(SMESH_Comment("Bad normal at node ")<< node->GetID(), data._index );
2982 edge._normal /= sqrt( normSize );
2984 // TODO: if ( !normOK ) then get normal by mesh faces
2986 // Set the rest data
2987 // --------------------
2988 if ( onShrinkShape )
2990 SMDS_MeshNode* tgtNode = const_cast<SMDS_MeshNode*>( edge._nodes.back() );
2991 if ( SMESHDS_SubMesh* sm = getMeshDS()->MeshElements( data._solid ))
2992 sm->RemoveNode( tgtNode , /*isNodeDeleted=*/false );
2994 // set initial position which is parameters on _sWOL in this case
2995 if ( eos.SWOLType() == TopAbs_EDGE )
2997 double u = helper.GetNodeU( TopoDS::Edge( eos._sWOL ), node, 0, &normOK );
2998 edge._pos.push_back( gp_XYZ( u, 0, 0 ));
2999 if ( edge._nodes.size() > 1 )
3000 getMeshDS()->SetNodeOnEdge( tgtNode, TopoDS::Edge( eos._sWOL ), u );
3004 gp_XY uv = helper.GetNodeUV( TopoDS::Face( eos._sWOL ), node, 0, &normOK );
3005 edge._pos.push_back( gp_XYZ( uv.X(), uv.Y(), 0));
3006 if ( edge._nodes.size() > 1 )
3007 getMeshDS()->SetNodeOnFace( tgtNode, TopoDS::Face( eos._sWOL ), uv.X(), uv.Y() );
3012 edge._pos.push_back( SMESH_TNodeXYZ( node ));
3014 if ( eos.ShapeType() == TopAbs_FACE )
3016 _Simplex::GetSimplices( node, edge._simplices, data._ignoreFaceIds, &data );
3020 // Set neighbour nodes for a _LayerEdge based on EDGE
3022 if ( eos.ShapeType() == TopAbs_EDGE /*||
3023 ( onShrinkShape && posType == SMDS_TOP_VERTEX && fabs( edge._cosin ) < 1e-10 )*/)
3025 edge._2neibors = new _2NearEdges;
3026 // target node instead of source ones will be set later
3027 // if ( ! findNeiborsOnEdge( &edge,
3028 // edge._2neibors->_nodes[0],
3029 // edge._2neibors->_nodes[1], eos,
3032 // edge.SetDataByNeighbors( edge._2neibors->_nodes[0],
3033 // edge._2neibors->_nodes[1],
3037 edge.SetCosin( edge._cosin ); // to update edge._lenFactor
3042 //================================================================================
3044 * \brief Return normal to a FACE at a node
3045 * \param [in] n - node
3046 * \param [in] face - FACE
3047 * \param [in] helper - helper
3048 * \param [out] isOK - true or false
3049 * \param [in] shiftInside - to find normal at a position shifted inside the face
3050 * \return gp_XYZ - normal
3052 //================================================================================
3054 gp_XYZ _ViscousBuilder::getFaceNormal(const SMDS_MeshNode* node,
3055 const TopoDS_Face& face,
3056 SMESH_MesherHelper& helper,
3063 // get a shifted position
3064 gp_Pnt p = SMESH_TNodeXYZ( node );
3065 gp_XYZ shift( 0,0,0 );
3066 TopoDS_Shape S = helper.GetSubShapeByNode( node, helper.GetMeshDS() );
3067 switch ( S.ShapeType() ) {
3070 shift = getFaceDir( face, TopoDS::Vertex( S ), node, helper, isOK );
3075 shift = getFaceDir( face, TopoDS::Edge( S ), node, helper, isOK );
3083 p.Translate( shift * 1e-5 );
3085 TopLoc_Location loc;
3086 GeomAPI_ProjectPointOnSurf& projector = helper.GetProjector( face, loc, 1e-7 );
3088 if ( !loc.IsIdentity() ) p.Transform( loc.Transformation().Inverted() );
3090 projector.Perform( p );
3091 if ( !projector.IsDone() || projector.NbPoints() < 1 )
3096 Quantity_Parameter U,V;
3097 projector.LowerDistanceParameters(U,V);
3102 uv = helper.GetNodeUV( face, node, 0, &isOK );
3108 Handle(Geom_Surface) surface = BRep_Tool::Surface( face );
3110 if ( !shiftInside &&
3111 helper.IsDegenShape( node->getshapeId() ) &&
3112 getFaceNormalAtSingularity( uv, face, helper, normal ))
3115 return normal.XYZ();
3118 int pointKind = GeomLib::NormEstim( surface, uv, 1e-5, normal );
3119 enum { REGULAR = 0, QUASYSINGULAR, CONICAL, IMPOSSIBLE };
3121 if ( pointKind == IMPOSSIBLE &&
3122 node->GetPosition()->GetDim() == 2 ) // node inside the FACE
3124 // probably NormEstim() failed due to a too high tolerance
3125 pointKind = GeomLib::NormEstim( surface, uv, 1e-20, normal );
3126 isOK = ( pointKind < IMPOSSIBLE );
3128 if ( pointKind < IMPOSSIBLE )
3130 if ( pointKind != REGULAR &&
3132 node->GetPosition()->GetDim() < 2 ) // FACE boundary
3134 gp_XYZ normShift = getFaceNormal( node, face, helper, isOK, /*shiftInside=*/true );
3135 if ( normShift * normal.XYZ() < 0. )
3141 if ( !isOK ) // hard singularity, to call with shiftInside=true ?
3143 const TGeomID faceID = helper.GetMeshDS()->ShapeToIndex( face );
3145 SMDS_ElemIteratorPtr fIt = node->GetInverseElementIterator(SMDSAbs_Face);
3146 while ( fIt->more() )
3148 const SMDS_MeshElement* f = fIt->next();
3149 if ( f->getshapeId() == faceID )
3151 isOK = SMESH_MeshAlgos::FaceNormal( f, (gp_XYZ&) normal.XYZ(), /*normalized=*/true );
3154 TopoDS_Face ff = face;
3155 ff.Orientation( TopAbs_FORWARD );
3156 if ( helper.IsReversedSubMesh( ff ))
3163 return normal.XYZ();
3166 //================================================================================
3168 * \brief Try to get normal at a singularity of a surface basing on it's nature
3170 //================================================================================
3172 bool _ViscousBuilder::getFaceNormalAtSingularity( const gp_XY& uv,
3173 const TopoDS_Face& face,
3174 SMESH_MesherHelper& helper,
3177 BRepAdaptor_Surface surface( face );
3179 if ( !getRovolutionAxis( surface, axis ))
3182 double f,l, d, du, dv;
3183 f = surface.FirstUParameter();
3184 l = surface.LastUParameter();
3185 d = ( uv.X() - f ) / ( l - f );
3186 du = ( d < 0.5 ? +1. : -1 ) * 1e-5 * ( l - f );
3187 f = surface.FirstVParameter();
3188 l = surface.LastVParameter();
3189 d = ( uv.Y() - f ) / ( l - f );
3190 dv = ( d < 0.5 ? +1. : -1 ) * 1e-5 * ( l - f );
3193 gp_Pnt2d testUV = uv;
3194 enum { REGULAR = 0, QUASYSINGULAR, CONICAL, IMPOSSIBLE };
3196 Handle(Geom_Surface) geomsurf = surface.Surface().Surface();
3197 for ( int iLoop = 0; true ; ++iLoop )
3199 testUV.SetCoord( testUV.X() + du, testUV.Y() + dv );
3200 if ( GeomLib::NormEstim( geomsurf, testUV, tol, refDir ) == REGULAR )
3207 if ( axis * refDir < 0. )
3215 //================================================================================
3217 * \brief Return a normal at a node weighted with angles taken by FACEs
3218 * \param [in] n - the node
3219 * \param [in] fId2Normal - FACE ids and normals
3220 * \param [in] nbFaces - nb of FACEs meeting at the node
3221 * \return gp_XYZ - computed normal
3223 //================================================================================
3225 gp_XYZ _ViscousBuilder::getWeigthedNormal( const SMDS_MeshNode* n,
3226 std::pair< TopoDS_Face, gp_XYZ > fId2Normal[],
3229 gp_XYZ resNorm(0,0,0);
3230 TopoDS_Shape V = SMESH_MesherHelper::GetSubShapeByNode( n, getMeshDS() );
3231 if ( V.ShapeType() != TopAbs_VERTEX )
3233 for ( int i = 0; i < nbFaces; ++i )
3234 resNorm += fId2Normal[i].second;
3238 // exclude equal normals
3239 //int nbUniqNorms = nbFaces;
3240 for ( int i = 0; i < nbFaces; ++i )
3241 for ( int j = i+1; j < nbFaces; ++j )
3242 if ( fId2Normal[i].second.IsEqual( fId2Normal[j].second, 0.1 ))
3244 fId2Normal[i].second.SetCoord( 0,0,0 );
3248 //if ( nbUniqNorms < 3 )
3250 for ( int i = 0; i < nbFaces; ++i )
3251 resNorm += fId2Normal[i].second;
3256 for ( int i = 0; i < nbFaces; ++i )
3258 const TopoDS_Face& F = fId2Normal[i].first;
3260 // look for two EDGEs shared by F and other FACEs within fId2Normal
3263 PShapeIteratorPtr eIt = SMESH_MesherHelper::GetAncestors( V, *_mesh, TopAbs_EDGE );
3264 while ( const TopoDS_Shape* E = eIt->next() )
3266 if ( !SMESH_MesherHelper::IsSubShape( *E, F ))
3268 bool isSharedEdge = false;
3269 for ( int j = 0; j < nbFaces && !isSharedEdge; ++j )
3271 if ( i == j ) continue;
3272 const TopoDS_Shape& otherF = fId2Normal[j].first;
3273 isSharedEdge = SMESH_MesherHelper::IsSubShape( *E, otherF );
3275 if ( !isSharedEdge )
3277 ee[ nbE ] = TopoDS::Edge( *E );
3278 ee[ nbE ].Orientation( SMESH_MesherHelper::GetSubShapeOri( F, *E ));
3283 // get an angle between the two EDGEs
3285 if ( nbE < 1 ) continue;
3292 if ( !V.IsSame( SMESH_MesherHelper::IthVertex( 0, ee[ 1 ] )))
3293 std::swap( ee[0], ee[1] );
3295 angles[i] = SMESH_MesherHelper::GetAngle( ee[0], ee[1], F, TopoDS::Vertex( V ));
3298 // compute a weighted normal
3299 double sumAngle = 0;
3300 for ( int i = 0; i < nbFaces; ++i )
3302 angles[i] = ( angles[i] > 2*M_PI ) ? 0 : M_PI - angles[i];
3303 sumAngle += angles[i];
3305 for ( int i = 0; i < nbFaces; ++i )
3306 resNorm += angles[i] / sumAngle * fId2Normal[i].second;
3311 //================================================================================
3313 * \brief Find 2 neigbor nodes of a node on EDGE
3315 //================================================================================
3317 bool _ViscousBuilder::findNeiborsOnEdge(const _LayerEdge* edge,
3318 const SMDS_MeshNode*& n1,
3319 const SMDS_MeshNode*& n2,
3323 const SMDS_MeshNode* node = edge->_nodes[0];
3324 const int shapeInd = eos._shapeID;
3325 SMESHDS_SubMesh* edgeSM = 0;
3326 if ( eos.ShapeType() == TopAbs_EDGE )
3328 edgeSM = eos._subMesh->GetSubMeshDS();
3329 if ( !edgeSM || edgeSM->NbElements() == 0 )
3330 return error(SMESH_Comment("Not meshed EDGE ") << shapeInd, data._index);
3334 SMDS_ElemIteratorPtr eIt = node->GetInverseElementIterator(SMDSAbs_Edge);
3335 while ( eIt->more() && !n2 )
3337 const SMDS_MeshElement* e = eIt->next();
3338 const SMDS_MeshNode* nNeibor = e->GetNode( 0 );
3339 if ( nNeibor == node ) nNeibor = e->GetNode( 1 );
3342 if (!edgeSM->Contains(e)) continue;
3346 TopoDS_Shape s = SMESH_MesherHelper::GetSubShapeByNode( nNeibor, getMeshDS() );
3347 if ( !SMESH_MesherHelper::IsSubShape( s, eos._sWOL )) continue;
3349 ( iN++ ? n2 : n1 ) = nNeibor;
3352 return error(SMESH_Comment("Wrongly meshed EDGE ") << shapeInd, data._index);
3356 //================================================================================
3358 * \brief Set _curvature and _2neibors->_plnNorm by 2 neigbor nodes residing the same EDGE
3360 //================================================================================
3362 void _LayerEdge::SetDataByNeighbors( const SMDS_MeshNode* n1,
3363 const SMDS_MeshNode* n2,
3364 const _EdgesOnShape& eos,
3365 SMESH_MesherHelper& helper)
3367 if ( eos.ShapeType() != TopAbs_EDGE )
3370 gp_XYZ pos = SMESH_TNodeXYZ( _nodes[0] );
3371 gp_XYZ vec1 = pos - SMESH_TNodeXYZ( n1 );
3372 gp_XYZ vec2 = pos - SMESH_TNodeXYZ( n2 );
3376 double sumLen = vec1.Modulus() + vec2.Modulus();
3377 _2neibors->_wgt[0] = 1 - vec1.Modulus() / sumLen;
3378 _2neibors->_wgt[1] = 1 - vec2.Modulus() / sumLen;
3379 double avgNormProj = 0.5 * ( _normal * vec1 + _normal * vec2 );
3380 double avgLen = 0.5 * ( vec1.Modulus() + vec2.Modulus() );
3381 if ( _curvature ) delete _curvature;
3382 _curvature = _Curvature::New( avgNormProj, avgLen );
3383 // if ( _curvature )
3384 // debugMsg( _nodes[0]->GetID()
3385 // << " CURV r,k: " << _curvature->_r<<","<<_curvature->_k
3386 // << " proj = "<<avgNormProj<< " len = " << avgLen << "| lenDelta(0) = "
3387 // << _curvature->lenDelta(0) );
3391 if ( eos._sWOL.IsNull() )
3393 TopoDS_Edge E = TopoDS::Edge( eos._shape );
3394 // if ( SMESH_Algo::isDegenerated( E ))
3396 gp_XYZ dirE = getEdgeDir( E, _nodes[0], helper );
3397 gp_XYZ plnNorm = dirE ^ _normal;
3398 double proj0 = plnNorm * vec1;
3399 double proj1 = plnNorm * vec2;
3400 if ( fabs( proj0 ) > 1e-10 || fabs( proj1 ) > 1e-10 )
3402 if ( _2neibors->_plnNorm ) delete _2neibors->_plnNorm;
3403 _2neibors->_plnNorm = new gp_XYZ( plnNorm.Normalized() );
3408 //================================================================================
3410 * \brief Copy data from a _LayerEdge of other SOLID and based on the same node;
3411 * this and other _LayerEdge's are inflated along a FACE or an EDGE
3413 //================================================================================
3415 gp_XYZ _LayerEdge::Copy( _LayerEdge& other,
3417 SMESH_MesherHelper& helper )
3419 _nodes = other._nodes;
3420 _normal = other._normal;
3422 _lenFactor = other._lenFactor;
3423 _cosin = other._cosin;
3424 _2neibors = other._2neibors;
3425 _curvature = 0; std::swap( _curvature, other._curvature );
3426 _2neibors = 0; std::swap( _2neibors, other._2neibors );
3428 gp_XYZ lastPos( 0,0,0 );
3429 if ( eos.SWOLType() == TopAbs_EDGE )
3431 double u = helper.GetNodeU( TopoDS::Edge( eos._sWOL ), _nodes[0] );
3432 _pos.push_back( gp_XYZ( u, 0, 0));
3434 u = helper.GetNodeU( TopoDS::Edge( eos._sWOL ), _nodes.back() );
3439 gp_XY uv = helper.GetNodeUV( TopoDS::Face( eos._sWOL ), _nodes[0]);
3440 _pos.push_back( gp_XYZ( uv.X(), uv.Y(), 0));
3442 uv = helper.GetNodeUV( TopoDS::Face( eos._sWOL ), _nodes.back() );
3443 lastPos.SetX( uv.X() );
3444 lastPos.SetY( uv.Y() );
3449 //================================================================================
3451 * \brief Set _cosin and _lenFactor
3453 //================================================================================
3455 void _LayerEdge::SetCosin( double cosin )
3458 cosin = Abs( _cosin );
3459 _lenFactor = ( /*0.1 < cosin &&*/ cosin < 1-1e-12 ) ? 1./sqrt(1-cosin*cosin) : 1.0;
3462 //================================================================================
3464 * \brief Fills a vector<_Simplex >
3466 //================================================================================
3468 void _Simplex::GetSimplices( const SMDS_MeshNode* node,
3469 vector<_Simplex>& simplices,
3470 const set<TGeomID>& ingnoreShapes,
3471 const _SolidData* dataToCheckOri,
3475 SMDS_ElemIteratorPtr fIt = node->GetInverseElementIterator(SMDSAbs_Face);
3476 while ( fIt->more() )
3478 const SMDS_MeshElement* f = fIt->next();
3479 const TGeomID shapeInd = f->getshapeId();
3480 if ( ingnoreShapes.count( shapeInd )) continue;
3481 const int nbNodes = f->NbCornerNodes();
3482 const int srcInd = f->GetNodeIndex( node );
3483 const SMDS_MeshNode* nPrev = f->GetNode( SMESH_MesherHelper::WrapIndex( srcInd-1, nbNodes ));
3484 const SMDS_MeshNode* nNext = f->GetNode( SMESH_MesherHelper::WrapIndex( srcInd+1, nbNodes ));
3485 const SMDS_MeshNode* nOpp = f->GetNode( SMESH_MesherHelper::WrapIndex( srcInd+2, nbNodes ));
3486 if ( dataToCheckOri && dataToCheckOri->_reversedFaceIds.count( shapeInd ))
3487 std::swap( nPrev, nNext );
3488 simplices.push_back( _Simplex( nPrev, nNext, nOpp ));
3492 SortSimplices( simplices );
3495 //================================================================================
3497 * \brief Set neighbor simplices side by side
3499 //================================================================================
3501 void _Simplex::SortSimplices(vector<_Simplex>& simplices)
3503 vector<_Simplex> sortedSimplices( simplices.size() );
3504 sortedSimplices[0] = simplices[0];
3506 for ( size_t i = 1; i < simplices.size(); ++i )
3508 for ( size_t j = 1; j < simplices.size(); ++j )
3509 if ( sortedSimplices[i-1]._nNext == simplices[j]._nPrev )
3511 sortedSimplices[i] = simplices[j];
3516 if ( nbFound == simplices.size() - 1 )
3517 simplices.swap( sortedSimplices );
3520 //================================================================================
3522 * \brief DEBUG. Create groups contating temorary data of _LayerEdge's
3524 //================================================================================
3526 void _ViscousBuilder::makeGroupOfLE()
3529 for ( size_t i = 0 ; i < _sdVec.size(); ++i )
3531 if ( _sdVec[i]._n2eMap.empty() ) continue;
3533 dumpFunction( SMESH_Comment("make_LayerEdge_") << i );
3534 TNode2Edge::iterator n2e;
3535 for ( n2e = _sdVec[i]._n2eMap.begin(); n2e != _sdVec[i]._n2eMap.end(); ++n2e )
3537 _LayerEdge* le = n2e->second;
3538 for ( size_t iN = 1; iN < le->_nodes.size(); ++iN )
3539 dumpCmd(SMESH_Comment("mesh.AddEdge([ ") <<le->_nodes[iN-1]->GetID()
3540 << ", " << le->_nodes[iN]->GetID() <<"])");
3544 dumpFunction( SMESH_Comment("makeNormals") << i );
3545 for ( n2e = _sdVec[i]._n2eMap.begin(); n2e != _sdVec[i]._n2eMap.end(); ++n2e )
3547 _LayerEdge* edge = n2e->second;
3548 SMESH_TNodeXYZ nXYZ( edge->_nodes[0] );
3549 nXYZ += edge->_normal * _sdVec[i]._stepSize;
3550 dumpCmd(SMESH_Comment("mesh.AddEdge([ ") << edge->_nodes[0]->GetID()
3551 << ", mesh.AddNode( " << nXYZ.X()<<","<< nXYZ.Y()<<","<< nXYZ.Z()<<")])");
3555 dumpFunction( SMESH_Comment("makeTmpFaces_") << i );
3556 dumpCmd( "faceId1 = mesh.NbElements()" );
3557 TopExp_Explorer fExp( _sdVec[i]._solid, TopAbs_FACE );
3558 for ( ; fExp.More(); fExp.Next() )
3560 if (const SMESHDS_SubMesh* sm = _sdVec[i]._proxyMesh->GetProxySubMesh( fExp.Current()))
3562 if ( sm->NbElements() == 0 ) continue;
3563 SMDS_ElemIteratorPtr fIt = sm->GetElements();
3564 while ( fIt->more())
3566 const SMDS_MeshElement* e = fIt->next();
3567 SMESH_Comment cmd("mesh.AddFace([");
3568 for ( int j=0; j < e->NbCornerNodes(); ++j )
3569 cmd << e->GetNode(j)->GetID() << (j+1<e->NbCornerNodes() ? ",": "])");
3574 dumpCmd( "faceId2 = mesh.NbElements()" );
3575 dumpCmd( SMESH_Comment( "mesh.MakeGroup( 'tmpFaces_" ) << i << "',"
3576 << "SMESH.FACE, SMESH.FT_RangeOfIds,'=',"
3577 << "'%s-%s' % (faceId1+1, faceId2))");
3583 //================================================================================
3585 * \brief Find maximal _LayerEdge length (layer thickness) limited by geometry
3587 //================================================================================
3589 void _ViscousBuilder::computeGeomSize( _SolidData& data )
3591 data._geomSize = Precision::Infinite();
3592 double intersecDist;
3593 auto_ptr<SMESH_ElementSearcher> searcher
3594 ( SMESH_MeshAlgos::GetElementSearcher( *getMeshDS(),
3595 data._proxyMesh->GetFaces( data._solid )) );
3597 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
3599 _EdgesOnShape& eos = data._edgesOnShape[ iS ];
3600 if ( eos._edges.empty() || eos.ShapeType() == TopAbs_EDGE )
3602 for ( size_t i = 0; i < eos._edges.size(); ++i )
3604 eos._edges[i]->FindIntersection( *searcher, intersecDist, data._epsilon, eos );
3605 if ( data._geomSize > intersecDist && intersecDist > 0 )
3606 data._geomSize = intersecDist;
3611 //================================================================================
3613 * \brief Increase length of _LayerEdge's to reach the required thickness of layers
3615 //================================================================================
3617 bool _ViscousBuilder::inflate(_SolidData& data)
3619 SMESH_MesherHelper helper( *_mesh );
3621 // Limit inflation step size by geometry size found by itersecting
3622 // normals of _LayerEdge's with mesh faces
3623 if ( data._stepSize > 0.3 * data._geomSize )
3624 limitStepSize( data, 0.3 * data._geomSize );
3626 const double tgtThick = data._maxThickness;
3627 if ( data._stepSize > data._minThickness )
3628 limitStepSize( data, data._minThickness );
3630 if ( data._stepSize < 1. )
3631 data._epsilon = data._stepSize * 1e-7;
3633 debugMsg( "-- geomSize = " << data._geomSize << ", stepSize = " << data._stepSize );
3635 const double safeFactor = ( 2*data._maxThickness < data._geomSize ) ? 1 : theThickToIntersection;
3637 double avgThick = 0, curThick = 0, distToIntersection = Precision::Infinite();
3638 int nbSteps = 0, nbRepeats = 0;
3639 while ( avgThick < 0.99 )
3641 // new target length
3642 curThick += data._stepSize;
3643 if ( curThick > tgtThick )
3645 curThick = tgtThick + tgtThick*( 1.-avgThick ) * nbRepeats;
3649 // Elongate _LayerEdge's
3650 dumpFunction(SMESH_Comment("inflate")<<data._index<<"_step"<<nbSteps); // debug
3651 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
3653 _EdgesOnShape& eos = data._edgesOnShape[iS];
3654 if ( eos._edges.empty() ) continue;
3656 const double shapeCurThick = Min( curThick, eos._hyp.GetTotalThickness() );
3657 for ( size_t i = 0; i < eos._edges.size(); ++i )
3659 eos._edges[i]->SetNewLength( shapeCurThick, eos, helper );
3664 if ( !updateNormals( data, helper, nbSteps ))
3667 // Improve and check quality
3668 if ( !smoothAndCheck( data, nbSteps, distToIntersection ))
3672 #ifdef __NOT_INVALIDATE_BAD_SMOOTH
3673 debugMsg("NOT INVALIDATED STEP!");
3674 return error("Smoothing failed", data._index);
3676 dumpFunction(SMESH_Comment("invalidate")<<data._index<<"_step"<<nbSteps); // debug
3677 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
3679 _EdgesOnShape& eos = data._edgesOnShape[iS];
3680 for ( size_t i = 0; i < eos._edges.size(); ++i )
3681 eos._edges[i]->InvalidateStep( nbSteps+1, eos );
3685 break; // no more inflating possible
3689 // Evaluate achieved thickness
3691 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
3693 _EdgesOnShape& eos = data._edgesOnShape[iS];
3694 if ( eos._edges.empty() ) continue;
3696 const double shapeTgtThick = eos._hyp.GetTotalThickness();
3697 for ( size_t i = 0; i < eos._edges.size(); ++i )
3699 avgThick += Min( 1., eos._edges[i]->_len / shapeTgtThick );
3702 avgThick /= data._n2eMap.size();
3703 debugMsg( "-- Thickness " << curThick << " ("<< avgThick*100 << "%) reached" );
3705 if ( distToIntersection < tgtThick * avgThick * safeFactor && avgThick < 0.9 )
3707 debugMsg( "-- Stop inflation since "
3708 << " distToIntersection( "<<distToIntersection<<" ) < avgThick( "
3709 << tgtThick * avgThick << " ) * " << safeFactor );
3713 limitStepSize( data, 0.25 * distToIntersection );
3714 if ( data._stepSizeNodes[0] )
3715 data._stepSize = data._stepSizeCoeff *
3716 SMESH_TNodeXYZ(data._stepSizeNodes[0]).Distance(data._stepSizeNodes[1]);
3718 } // while ( avgThick < 0.99 )
3721 return error("failed at the very first inflation step", data._index);
3723 if ( avgThick < 0.99 )
3725 if ( !data._proxyMesh->_warning || data._proxyMesh->_warning->IsOK() )
3727 data._proxyMesh->_warning.reset
3728 ( new SMESH_ComputeError (COMPERR_WARNING,
3729 SMESH_Comment("Thickness ") << tgtThick <<
3730 " of viscous layers not reached,"
3731 " average reached thickness is " << avgThick*tgtThick));
3735 // Restore position of src nodes moved by infaltion on _noShrinkShapes
3736 dumpFunction(SMESH_Comment("restoNoShrink_So")<<data._index); // debug
3737 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
3739 _EdgesOnShape& eos = data._edgesOnShape[iS];
3740 if ( !eos._edges.empty() && eos._edges[0]->_nodes.size() == 1 )
3741 for ( size_t i = 0; i < eos._edges.size(); ++i )
3743 restoreNoShrink( *eos._edges[ i ] );
3751 //================================================================================
3753 * \brief Improve quality of layer inner surface and check intersection
3755 //================================================================================
3757 bool _ViscousBuilder::smoothAndCheck(_SolidData& data,
3759 double & distToIntersection)
3761 if ( data._nbShapesToSmooth == 0 )
3762 return true; // no shapes needing smoothing
3764 bool moved, improved;
3765 vector< _LayerEdge* > badSmooEdges;
3767 SMESH_MesherHelper helper(*_mesh);
3768 Handle(Geom_Surface) surface;
3771 for ( int isFace = 0; isFace < 2; ++isFace ) // smooth on [ EDGEs, FACEs ]
3773 const TopAbs_ShapeEnum shapeType = isFace ? TopAbs_FACE : TopAbs_EDGE;
3775 for ( int iS = 0; iS < data._edgesOnShape.size(); ++iS )
3777 _EdgesOnShape& eos = data._edgesOnShape[ iS ];
3778 if ( !eos._toSmooth || eos.ShapeType() != shapeType )
3781 // already smoothed?
3782 bool toSmooth = ( eos._edges[ 0 ]->NbSteps() >= nbSteps+1 );
3783 if ( !toSmooth ) continue;
3785 if ( !eos._hyp.ToSmooth() )
3787 // smooth disabled by the user; check validy only
3788 if ( !isFace ) continue;
3790 for ( size_t i = 0; i < eos._edges.size(); ++i )
3792 _LayerEdge* edge = eos._edges[i];
3793 const gp_XYZ& curPos ( );
3794 for ( size_t iF = 0; iF < edge->_simplices.size(); ++iF )
3795 if ( !edge->_simplices[iF].IsForward( edge->_nodes[0],
3796 &edge->_pos.back(), vol ))
3799 continue; // goto to the next EDGE or FACE
3803 if ( eos.SWOLType() == TopAbs_FACE )
3805 if ( !F.IsSame( eos._sWOL )) {
3806 F = TopoDS::Face( eos._sWOL );
3807 helper.SetSubShape( F );
3808 surface = BRep_Tool::Surface( F );
3813 F.Nullify(); surface.Nullify();
3815 const TGeomID sInd = eos._shapeID;
3817 // perform smoothing
3819 if ( eos.ShapeType() == TopAbs_EDGE )
3821 dumpFunction(SMESH_Comment("smooth")<<data._index << "_Ed"<<sInd <<"_InfStep"<<nbSteps);
3823 // try a simple solution on an analytic EDGE
3824 if ( !smoothAnalyticEdge( data, eos, surface, F, helper ))
3830 for ( size_t i = 0; i < eos._edges.size(); ++i )
3832 moved |= eos._edges[i]->SmoothOnEdge( surface, F, helper );
3834 dumpCmd( SMESH_Comment("# end step ")<<step);
3836 while ( moved && step++ < 5 );
3844 const bool isConcaveFace = data._concaveFaces.count( sInd );
3846 int step = 0, stepLimit = 5, badNb = 0;
3847 while (( ++step <= stepLimit ) || improved )
3849 dumpFunction(SMESH_Comment("smooth")<<data._index<<"_Fa"<<sInd
3850 <<"_InfStep"<<nbSteps<<"_"<<step); // debug
3851 int oldBadNb = badNb;
3852 badSmooEdges.clear();
3855 for ( size_t i = 0; i < eos._edges.size(); ++i ) // iterate forward
3856 if ( eos._edges[i]->Smooth( step, isConcaveFace, false ))
3857 badSmooEdges.push_back( eos._edges[i] );
3861 for ( int i = eos._edges.size()-1; i >= 0; --i ) // iterate backward
3862 if ( eos._edges[i]->Smooth( step, isConcaveFace, false ))
3863 badSmooEdges.push_back( eos._edges[i] );
3865 badNb = badSmooEdges.size();
3866 improved = ( badNb < oldBadNb );
3868 if ( !badSmooEdges.empty() && step >= stepLimit / 2 )
3870 // look for the best smooth of _LayerEdge's neighboring badSmooEdges
3871 vector<_Simplex> simplices;
3872 for ( size_t i = 0; i < badSmooEdges.size(); ++i )
3874 _LayerEdge* ledge = badSmooEdges[i];
3875 _Simplex::GetSimplices( ledge->_nodes[0], simplices, data._ignoreFaceIds );
3876 for ( size_t iS = 0; iS < simplices.size(); ++iS )
3878 TNode2Edge::iterator n2e = data._n2eMap.find( simplices[iS]._nNext );
3879 if ( n2e != data._n2eMap.end()) {
3880 _LayerEdge* ledge2 = n2e->second;
3881 if ( ledge2->_nodes[0]->getshapeId() == sInd )
3882 ledge2->Smooth( step, isConcaveFace, /*findBest=*/true );
3887 // issue 22576 -- no bad faces but still there are intersections to fix
3888 // if ( improved && badNb == 0 )
3889 // stepLimit = step + 3;
3897 for ( int i = 0; i < eos._edges.size(); ++i )
3899 _LayerEdge* edge = eos._edges[i];
3900 SMESH_TNodeXYZ tgtXYZ( edge->_nodes.back() );
3901 for ( size_t j = 0; j < edge->_simplices.size(); ++j )
3902 if ( !edge->_simplices[j].IsForward( edge->_nodes[0], &tgtXYZ, vol ))
3904 cout << "Bad simplex ( " << edge->_nodes[0]->GetID()<< " "<< tgtXYZ._node->GetID()
3905 << " "<< edge->_simplices[j]._nPrev->GetID()
3906 << " "<< edge->_simplices[j]._nNext->GetID() << " )" << endl;
3913 } // // smooth on FACE's
3915 } // smooth on [ EDGEs, FACEs ]
3917 // Check orientation of simplices of _ConvexFace::_simplexTestEdges
3918 map< TGeomID, _ConvexFace >::iterator id2face = data._convexFaces.begin();
3919 for ( ; id2face != data._convexFaces.end(); ++id2face )
3921 _ConvexFace & convFace = (*id2face).second;
3922 if ( !convFace._simplexTestEdges.empty() &&
3923 convFace._simplexTestEdges[0]->_nodes[0]->GetPosition()->GetDim() == 2 )
3924 continue; // _simplexTestEdges are based on FACE -- already checked while smoothing
3926 if ( !convFace.CheckPrisms() )
3930 // Check if the last segments of _LayerEdge intersects 2D elements;
3931 // checked elements are either temporary faces or faces on surfaces w/o the layers
3933 auto_ptr<SMESH_ElementSearcher> searcher
3934 ( SMESH_MeshAlgos::GetElementSearcher( *getMeshDS(),
3935 data._proxyMesh->GetFaces( data._solid )) );
3937 distToIntersection = Precision::Infinite();
3939 const SMDS_MeshElement* intFace = 0;
3940 const SMDS_MeshElement* closestFace = 0;
3942 for ( int iS = 0; iS < data._edgesOnShape.size(); ++iS )
3944 _EdgesOnShape& eos = data._edgesOnShape[ iS ];
3945 if ( eos._edges.empty() || !eos._sWOL.IsNull() )
3947 for ( size_t i = 0; i < eos._edges.size(); ++i )
3949 if ( eos._edges[i]->FindIntersection( *searcher, dist, data._epsilon, eos, &intFace ))
3951 if ( distToIntersection > dist )
3953 // ignore intersection of a _LayerEdge based on a _ConvexFace with a face
3954 // lying on this _ConvexFace
3955 if ( _ConvexFace* convFace = data.GetConvexFace( intFace->getshapeId() ))
3956 if ( convFace->_subIdToEOS.count ( eos._shapeID ))
3959 // ignore intersection of a _LayerEdge based on a FACE with an element on this FACE
3960 // ( avoid limiting the thickness on the case of issue 22576)
3961 if ( intFace->getshapeId() == eos._shapeID )
3964 distToIntersection = dist;
3966 closestFace = intFace;
3973 SMDS_MeshElement::iterator nIt = closestFace->begin_nodes();
3974 cout << "Shortest distance: _LayerEdge nodes: tgt " << le->_nodes.back()->GetID()
3975 << " src " << le->_nodes[0]->GetID()<< ", intersection with face ("
3976 << (*nIt++)->GetID()<<" "<< (*nIt++)->GetID()<<" "<< (*nIt++)->GetID()
3977 << ") distance = " << distToIntersection<< endl;
3984 //================================================================================
3986 * \brief Return a curve of the EDGE to be used for smoothing and arrange
3987 * _LayerEdge's to be in a consequent order
3989 //================================================================================
3991 Handle(Geom_Curve) _SolidData::CurveForSmooth( const TopoDS_Edge& E,
3993 SMESH_MesherHelper& helper)
3995 const TGeomID eIndex = eos._shapeID;
3997 map< TGeomID, Handle(Geom_Curve)>::iterator i2curve = _edge2curve.find( eIndex );
3999 if ( i2curve == _edge2curve.end() )
4001 // sort _LayerEdge's by position on the EDGE
4002 SortOnEdge( E, eos._edges, helper );
4004 SMESHDS_SubMesh* smDS = eos._subMesh->GetSubMeshDS();
4006 TopLoc_Location loc; double f,l;
4008 Handle(Geom_Line) line;
4009 Handle(Geom_Circle) circle;
4010 bool isLine, isCirc;
4011 if ( eos._sWOL.IsNull() ) /////////////////////////////////////////// 3D case
4013 // check if the EDGE is a line
4014 Handle(Geom_Curve) curve = BRep_Tool::Curve( E, loc, f, l);
4015 if ( curve->IsKind( STANDARD_TYPE( Geom_TrimmedCurve )))
4016 curve = Handle(Geom_TrimmedCurve)::DownCast( curve )->BasisCurve();
4018 line = Handle(Geom_Line)::DownCast( curve );
4019 circle = Handle(Geom_Circle)::DownCast( curve );
4020 isLine = (!line.IsNull());
4021 isCirc = (!circle.IsNull());
4023 if ( !isLine && !isCirc ) // Check if the EDGE is close to a line
4026 // SMDS_NodeIteratorPtr nIt = smDS->GetNodes();
4027 // while ( nIt->more() )
4028 // bndBox.Add( SMESH_TNodeXYZ( nIt->next() ));
4029 // gp_XYZ size = bndBox.CornerMax() - bndBox.CornerMin();
4032 // if ( eos._edges.size() > 1 ) {
4033 // p0 = SMESH_TNodeXYZ( eos._edges[0]->_nodes[0] );
4034 // p1 = SMESH_TNodeXYZ( eos._edges[1]->_nodes[0] );
4037 // p0 = curve->Value( f );
4038 // p1 = curve->Value( l );
4040 // const double lineTol = 1e-2 * p0.Distance( p1 );
4041 // for ( int i = 0; i < 3 && !isLine; ++i )
4042 // isLine = ( size.Coord( i+1 ) <= lineTol ); ////////// <--- WRONG
4044 isLine = SMESH_Algo::IsStraight( E );
4047 line = new Geom_Line( gp::OX() ); // only type does matter
4049 if ( !isLine && !isCirc && eos._edges.size() > 2) // Check if the EDGE is close to a circle
4054 else //////////////////////////////////////////////////////////////////////// 2D case
4056 const TopoDS_Face& F = TopoDS::Face( eos._sWOL );
4058 // check if the EDGE is a line
4059 Handle(Geom2d_Curve) curve = BRep_Tool::CurveOnSurface( E, F, f, l);
4060 if ( curve->IsKind( STANDARD_TYPE( Geom2d_TrimmedCurve )))
4061 curve = Handle(Geom2d_TrimmedCurve)::DownCast( curve )->BasisCurve();
4063 Handle(Geom2d_Line) line2d = Handle(Geom2d_Line)::DownCast( curve );
4064 Handle(Geom2d_Circle) circle2d = Handle(Geom2d_Circle)::DownCast( curve );
4065 isLine = (!line2d.IsNull());
4066 isCirc = (!circle2d.IsNull());
4068 if ( !isLine && !isCirc) // Check if the EDGE is close to a line
4071 SMDS_NodeIteratorPtr nIt = smDS->GetNodes();
4072 while ( nIt->more() )
4073 bndBox.Add( helper.GetNodeUV( F, nIt->next() ));
4074 gp_XY size = bndBox.CornerMax() - bndBox.CornerMin();
4076 const double lineTol = 1e-2 * sqrt( bndBox.SquareExtent() );
4077 for ( int i = 0; i < 2 && !isLine; ++i )
4078 isLine = ( size.Coord( i+1 ) <= lineTol );
4080 if ( !isLine && !isCirc && eos._edges.size() > 2) // Check if the EDGE is close to a circle
4086 line = new Geom_Line( gp::OX() ); // only type does matter
4090 gp_Pnt2d p = circle2d->Location();
4091 gp_Ax2 ax( gp_Pnt( p.X(), p.Y(), 0), gp::DX());
4092 circle = new Geom_Circle( ax, 1.); // only center position does matter
4096 Handle(Geom_Curve)& res = _edge2curve[ eIndex ];
4104 return i2curve->second;
4107 //================================================================================
4109 * \brief Sort _LayerEdge's by a parameter on a given EDGE
4111 //================================================================================
4113 void _SolidData::SortOnEdge( const TopoDS_Edge& E,
4114 vector< _LayerEdge* >& edges,
4115 SMESH_MesherHelper& helper)
4117 map< double, _LayerEdge* > u2edge;
4118 for ( size_t i = 0; i < edges.size(); ++i )
4119 u2edge.insert( make_pair( helper.GetNodeU( E, edges[i]->_nodes[0] ), edges[i] ));
4121 ASSERT( u2edge.size() == edges.size() );
4122 map< double, _LayerEdge* >::iterator u2e = u2edge.begin();
4123 for ( int i = 0; i < edges.size(); ++i, ++u2e )
4124 edges[i] = u2e->second;
4126 Sort2NeiborsOnEdge( edges );
4129 //================================================================================
4131 * \brief Set _2neibors according to the order of _LayerEdge on EDGE
4133 //================================================================================
4135 void _SolidData::Sort2NeiborsOnEdge( vector< _LayerEdge* >& edges )
4137 for ( size_t i = 0; i < edges.size()-1; ++i )
4138 if ( edges[i]->_2neibors->tgtNode(1) != edges[i+1]->_nodes.back() )
4139 edges[i]->_2neibors->reverse();
4141 const size_t iLast = edges.size() - 1;
4142 if ( edges.size() > 1 &&
4143 edges[iLast]->_2neibors->tgtNode(0) != edges[iLast-1]->_nodes.back() )
4144 edges[iLast]->_2neibors->reverse();
4147 //================================================================================
4149 * \brief Return _EdgesOnShape* corresponding to the shape
4151 //================================================================================
4153 _EdgesOnShape* _SolidData::GetShapeEdges(const TGeomID shapeID )
4155 if ( shapeID < _edgesOnShape.size() &&
4156 _edgesOnShape[ shapeID ]._shapeID == shapeID )
4157 return & _edgesOnShape[ shapeID ];
4159 for ( size_t i = 0; i < _edgesOnShape.size(); ++i )
4160 if ( _edgesOnShape[i]._shapeID == shapeID )
4161 return & _edgesOnShape[i];
4166 //================================================================================
4168 * \brief Return _EdgesOnShape* corresponding to the shape
4170 //================================================================================
4172 _EdgesOnShape* _SolidData::GetShapeEdges(const TopoDS_Shape& shape )
4174 SMESHDS_Mesh* meshDS = _proxyMesh->GetMesh()->GetMeshDS();
4175 return GetShapeEdges( meshDS->ShapeToIndex( shape ));
4178 //================================================================================
4180 * \brief Prepare data of the _LayerEdge for smoothing on FACE
4182 //================================================================================
4184 void _SolidData::PrepareEdgesToSmoothOnFace( _EdgesOnShape* eof, bool substituteSrcNodes )
4186 set< TGeomID > vertices;
4187 SMESH_MesherHelper helper( *_proxyMesh->GetMesh() );
4188 if ( isConcave( TopoDS::Face( eof->_shape ), helper, &vertices ))
4189 _concaveFaces.insert( eof->_shapeID );
4191 for ( size_t i = 0; i < eof->_edges.size(); ++i )
4192 eof->_edges[i]->_smooFunction = 0;
4194 for ( size_t i = 0; i < eof->_edges.size(); ++i )
4196 _LayerEdge* edge = eof->_edges[i];
4197 _Simplex::GetSimplices
4198 ( edge->_nodes[0], edge->_simplices, _ignoreFaceIds, this, /*sort=*/true );
4200 edge->ChooseSmooFunction( vertices, _n2eMap );
4202 double avgNormProj = 0, avgLen = 0;
4203 for ( size_t i = 0; i < edge->_simplices.size(); ++i )
4205 _Simplex& s = edge->_simplices[i];
4207 gp_XYZ vec = edge->_pos.back() - SMESH_TNodeXYZ( s._nPrev );
4208 avgNormProj += edge->_normal * vec;
4209 avgLen += vec.Modulus();
4210 if ( substituteSrcNodes )
4212 s._nNext = _n2eMap[ s._nNext ]->_nodes.back();
4213 s._nPrev = _n2eMap[ s._nPrev ]->_nodes.back();
4216 avgNormProj /= edge->_simplices.size();
4217 avgLen /= edge->_simplices.size();
4218 edge->_curvature = _Curvature::New( avgNormProj, avgLen );
4222 //================================================================================
4224 * \brief Add faces for smoothing
4226 //================================================================================
4228 void _SolidData::AddShapesToSmooth( const set< _EdgesOnShape* >& eosSet )
4230 set< _EdgesOnShape * >::const_iterator eos = eosSet.begin();
4231 for ( ; eos != eosSet.end(); ++eos )
4233 if ( !*eos || (*eos)->_toSmooth ) continue;
4235 (*eos)->_toSmooth = true;
4237 if ( (*eos)->ShapeType() == TopAbs_FACE )
4239 PrepareEdgesToSmoothOnFace( *eos, /*substituteSrcNodes=*/true );
4244 //================================================================================
4246 * \brief smooth _LayerEdge's on a staight EDGE or circular EDGE
4248 //================================================================================
4250 bool _ViscousBuilder::smoothAnalyticEdge( _SolidData& data,
4252 Handle(Geom_Surface)& surface,
4253 const TopoDS_Face& F,
4254 SMESH_MesherHelper& helper)
4256 const TopoDS_Edge& E = TopoDS::Edge( eos._shape );
4258 Handle(Geom_Curve) curve = data.CurveForSmooth( E, eos, helper );
4259 if ( curve.IsNull() ) return false;
4261 const size_t iFrom = 0, iTo = eos._edges.size();
4263 // compute a relative length of segments
4264 vector< double > len( iTo-iFrom+1 );
4266 double curLen, prevLen = len[0] = 1.0;
4267 for ( int i = iFrom; i < iTo; ++i )
4269 curLen = prevLen * eos._edges[i]->_2neibors->_wgt[0] / eos._edges[i]->_2neibors->_wgt[1];
4270 len[i-iFrom+1] = len[i-iFrom] + curLen;
4275 if ( curve->IsKind( STANDARD_TYPE( Geom_Line )))
4277 if ( F.IsNull() ) // 3D
4279 SMESH_TNodeXYZ p0( eos._edges[iFrom]->_2neibors->tgtNode(0));
4280 SMESH_TNodeXYZ p1( eos._edges[iTo-1]->_2neibors->tgtNode(1));
4281 for ( int i = iFrom; i < iTo; ++i )
4283 double r = len[i-iFrom] / len.back();
4284 gp_XYZ newPos = p0 * ( 1. - r ) + p1 * r;
4285 eos._edges[i]->_pos.back() = newPos;
4286 SMDS_MeshNode* tgtNode = const_cast<SMDS_MeshNode*>( eos._edges[i]->_nodes.back() );
4287 tgtNode->setXYZ( newPos.X(), newPos.Y(), newPos.Z() );
4288 dumpMove( tgtNode );
4293 // gp_XY uv0 = helper.GetNodeUV( F, eos._edges[iFrom]->_2neibors->tgtNode(0));
4294 // gp_XY uv1 = helper.GetNodeUV( F, eos._edges[iTo-1]->_2neibors->tgtNode(1));
4295 _LayerEdge* e0 = eos._edges[iFrom]->_2neibors->_edges[0];
4296 _LayerEdge* e1 = eos._edges[iTo-1]->_2neibors->_edges[1];
4297 gp_XY uv0 = e0->LastUV( F, *data.GetShapeEdges( e0 ));
4298 gp_XY uv1 = e1->LastUV( F, *data.GetShapeEdges( e1 ));
4299 if ( eos._edges[iFrom]->_2neibors->tgtNode(0) ==
4300 eos._edges[iTo-1]->_2neibors->tgtNode(1) ) // closed edge
4302 int iPeriodic = helper.GetPeriodicIndex();
4303 if ( iPeriodic == 1 || iPeriodic == 2 )
4305 uv1.SetCoord( iPeriodic, helper.GetOtherParam( uv1.Coord( iPeriodic )));
4306 if ( uv0.Coord( iPeriodic ) > uv1.Coord( iPeriodic ))
4307 std::swap( uv0, uv1 );
4310 const gp_XY rangeUV = uv1 - uv0;
4311 for ( int i = iFrom; i < iTo; ++i )
4313 double r = len[i-iFrom] / len.back();
4314 gp_XY newUV = uv0 + r * rangeUV;
4315 eos._edges[i]->_pos.back().SetCoord( newUV.X(), newUV.Y(), 0 );
4317 gp_Pnt newPos = surface->Value( newUV.X(), newUV.Y() );
4318 SMDS_MeshNode* tgtNode = const_cast<SMDS_MeshNode*>( eos._edges[i]->_nodes.back() );
4319 tgtNode->setXYZ( newPos.X(), newPos.Y(), newPos.Z() );
4320 dumpMove( tgtNode );
4322 SMDS_FacePosition* pos = static_cast<SMDS_FacePosition*>( tgtNode->GetPosition() );
4323 pos->SetUParameter( newUV.X() );
4324 pos->SetVParameter( newUV.Y() );
4330 if ( curve->IsKind( STANDARD_TYPE( Geom_Circle )))
4332 Handle(Geom_Circle) circle = Handle(Geom_Circle)::DownCast( curve );
4333 gp_Pnt center3D = circle->Location();
4335 if ( F.IsNull() ) // 3D
4337 if ( eos._edges[iFrom]->_2neibors->tgtNode(0) ==
4338 eos._edges[iTo-1]->_2neibors->tgtNode(1) )
4339 return true; // closed EDGE - nothing to do
4341 return false; // TODO ???
4345 const gp_XY center( center3D.X(), center3D.Y() );
4347 _LayerEdge* e0 = eos._edges[iFrom]->_2neibors->_edges[0];
4348 _LayerEdge* eM = eos._edges[iFrom];
4349 _LayerEdge* e1 = eos._edges[iTo-1]->_2neibors->_edges[1];
4350 gp_XY uv0 = e0->LastUV( F, *data.GetShapeEdges( e0 ) );
4351 gp_XY uvM = eM->LastUV( F, *data.GetShapeEdges( eM ) );
4352 gp_XY uv1 = e1->LastUV( F, *data.GetShapeEdges( e1 ) );
4353 gp_Vec2d vec0( center, uv0 );
4354 gp_Vec2d vecM( center, uvM );
4355 gp_Vec2d vec1( center, uv1 );
4356 double uLast = vec0.Angle( vec1 ); // -PI - +PI
4357 double uMidl = vec0.Angle( vecM );
4358 if ( uLast * uMidl <= 0. )
4359 uLast += ( uMidl > 0 ? +2. : -2. ) * M_PI;
4360 const double radius = 0.5 * ( vec0.Magnitude() + vec1.Magnitude() );
4362 gp_Ax2d axis( center, vec0 );
4363 gp_Circ2d circ( axis, radius );
4364 for ( int i = iFrom; i < iTo; ++i )
4366 double newU = uLast * len[i-iFrom] / len.back();
4367 gp_Pnt2d newUV = ElCLib::Value( newU, circ );
4368 eos._edges[i]->_pos.back().SetCoord( newUV.X(), newUV.Y(), 0 );
4370 gp_Pnt newPos = surface->Value( newUV.X(), newUV.Y() );
4371 SMDS_MeshNode* tgtNode = const_cast<SMDS_MeshNode*>( eos._edges[i]->_nodes.back() );
4372 tgtNode->setXYZ( newPos.X(), newPos.Y(), newPos.Z() );
4373 dumpMove( tgtNode );
4375 SMDS_FacePosition* pos = static_cast<SMDS_FacePosition*>( tgtNode->GetPosition() );
4376 pos->SetUParameter( newUV.X() );
4377 pos->SetVParameter( newUV.Y() );
4386 //================================================================================
4388 * \brief Modify normals of _LayerEdge's on EDGE's to avoid intersection with
4389 * _LayerEdge's on neighbor EDGE's
4391 //================================================================================
4393 bool _ViscousBuilder::updateNormals( _SolidData& data,
4394 SMESH_MesherHelper& helper,
4398 return updateNormalsOfConvexFaces( data, helper, stepNb );
4400 // make temporary quadrangles got by extrusion of
4401 // mesh edges along _LayerEdge._normal's
4403 vector< const SMDS_MeshElement* > tmpFaces;
4405 set< SMESH_TLink > extrudedLinks; // contains target nodes
4406 vector< const SMDS_MeshNode*> nodes(4); // of a tmp mesh face
4408 dumpFunction(SMESH_Comment("makeTmpFacesOnEdges")<<data._index);
4409 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
4411 _EdgesOnShape& eos = data._edgesOnShape[ iS ];
4412 if ( eos.ShapeType() != TopAbs_EDGE || !eos._sWOL.IsNull() )
4414 for ( size_t i = 0; i < eos._edges.size(); ++i )
4416 _LayerEdge* edge = eos._edges[i];
4417 const SMDS_MeshNode* tgt1 = edge->_nodes.back();
4418 for ( int j = 0; j < 2; ++j ) // loop on _2NearEdges
4420 const SMDS_MeshNode* tgt2 = edge->_2neibors->tgtNode(j);
4421 pair< set< SMESH_TLink >::iterator, bool > link_isnew =
4422 extrudedLinks.insert( SMESH_TLink( tgt1, tgt2 ));
4423 if ( !link_isnew.second )
4425 extrudedLinks.erase( link_isnew.first );
4426 continue; // already extruded and will no more encounter
4428 // a _LayerEdge containg tgt2
4429 _LayerEdge* neiborEdge = edge->_2neibors->_edges[j];
4431 _TmpMeshFaceOnEdge* f = new _TmpMeshFaceOnEdge( edge, neiborEdge, --_tmpFaceID );
4432 tmpFaces.push_back( f );
4434 dumpCmd(SMESH_Comment("mesh.AddFace([ ")
4435 <<f->_nn[0]->GetID()<<", "<<f->_nn[1]->GetID()<<", "
4436 <<f->_nn[2]->GetID()<<", "<<f->_nn[3]->GetID()<<" ])");
4442 // Check if _LayerEdge's based on EDGE's intersects tmpFaces.
4443 // Perform two loops on _LayerEdge on EDGE's:
4444 // 1) to find and fix intersection
4445 // 2) to check that no new intersection appears as result of 1)
4447 SMDS_ElemIteratorPtr fIt( new SMDS_ElementVectorIterator( tmpFaces.begin(),
4449 auto_ptr<SMESH_ElementSearcher> searcher
4450 ( SMESH_MeshAlgos::GetElementSearcher( *getMeshDS(), fIt ));
4452 // 1) Find intersections
4454 const SMDS_MeshElement* face;
4455 typedef map< _LayerEdge*, set< _LayerEdge*, _LayerEdgeCmp >, _LayerEdgeCmp > TLEdge2LEdgeSet;
4456 TLEdge2LEdgeSet edge2CloseEdge;
4458 const double eps = data._epsilon * data._epsilon;
4459 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
4461 _EdgesOnShape& eos = data._edgesOnShape[ iS ];
4462 if (( eos.ShapeType() != TopAbs_EDGE ) &&
4463 ( eos._sWOL.IsNull() || eos.SWOLType() != TopAbs_FACE ))
4465 for ( size_t i = 0; i < eos._edges.size(); ++i )
4467 _LayerEdge* edge = eos._edges[i];
4468 if ( edge->FindIntersection( *searcher, dist, eps, eos, &face ))
4470 const _TmpMeshFaceOnEdge* f = (const _TmpMeshFaceOnEdge*) face;
4471 set< _LayerEdge*, _LayerEdgeCmp > & ee = edge2CloseEdge[ edge ];
4472 ee.insert( f->_le1 );
4473 ee.insert( f->_le2 );
4474 if ( f->_le1->IsOnEdge() && data.GetShapeEdges( f->_le1 )->_sWOL.IsNull() )
4475 edge2CloseEdge[ f->_le1 ].insert( edge );
4476 if ( f->_le2->IsOnEdge() && data.GetShapeEdges( f->_le2 )->_sWOL.IsNull() )
4477 edge2CloseEdge[ f->_le2 ].insert( edge );
4482 // Set _LayerEdge._normal
4484 if ( !edge2CloseEdge.empty() )
4486 dumpFunction(SMESH_Comment("updateNormals")<<data._index);
4488 set< _EdgesOnShape* > shapesToSmooth;
4490 // vector to store new _normal and _cosin for each edge in edge2CloseEdge
4491 vector< pair< _LayerEdge*, _LayerEdge > > edge2newEdge( edge2CloseEdge.size() );
4493 TLEdge2LEdgeSet::iterator e2ee = edge2CloseEdge.begin();
4494 for ( size_t iE = 0; e2ee != edge2CloseEdge.end(); ++e2ee, ++iE )
4496 _LayerEdge* edge1 = e2ee->first;
4497 _LayerEdge* edge2 = 0;
4498 set< _LayerEdge*, _LayerEdgeCmp >& ee = e2ee->second;
4500 edge2newEdge[ iE ].first = NULL;
4502 _EdgesOnShape* eos1 = data.GetShapeEdges( edge1 );
4503 if ( !eos1 ) continue;
4505 // find EDGEs the edges reside
4506 // TopoDS_Edge E1, E2;
4507 // TopoDS_Shape S = helper.GetSubShapeByNode( edge1->_nodes[0], getMeshDS() );
4508 // if ( S.ShapeType() != TopAbs_EDGE )
4509 // continue; // TODO: find EDGE by VERTEX
4510 // E1 = TopoDS::Edge( S );
4511 set< _LayerEdge*, _LayerEdgeCmp >::iterator eIt = ee.begin();
4512 for ( ; !edge2 && eIt != ee.end(); ++eIt )
4514 if ( eos1->_sWOL == data.GetShapeEdges( *eIt )->_sWOL )
4517 if ( !edge2 ) continue;
4519 edge2newEdge[ iE ].first = edge1;
4520 _LayerEdge& newEdge = edge2newEdge[ iE ].second;
4521 // while ( E2.IsNull() && eIt != ee.end())
4523 // _LayerEdge* e2 = *eIt++;
4524 // TopoDS_Shape S = helper.GetSubShapeByNode( e2->_nodes[0], getMeshDS() );
4525 // if ( S.ShapeType() == TopAbs_EDGE )
4526 // E2 = TopoDS::Edge( S ), edge2 = e2;
4528 // if ( E2.IsNull() ) continue; // TODO: find EDGE by VERTEX
4530 // find 3 FACEs sharing 2 EDGEs
4532 // TopoDS_Face FF1[2], FF2[2];
4533 // PShapeIteratorPtr fIt = helper.GetAncestors(E1, *_mesh, TopAbs_FACE);
4534 // while ( fIt->more() && FF1[1].IsNull() )
4536 // const TopoDS_Face *F = (const TopoDS_Face*) fIt->next();
4537 // if ( helper.IsSubShape( *F, data._solid))
4538 // FF1[ FF1[0].IsNull() ? 0 : 1 ] = *F;
4540 // fIt = helper.GetAncestors(E2, *_mesh, TopAbs_FACE);
4541 // while ( fIt->more() && FF2[1].IsNull())
4543 // const TopoDS_Face *F = (const TopoDS_Face*) fIt->next();
4544 // if ( helper.IsSubShape( *F, data._solid))
4545 // FF2[ FF2[0].IsNull() ? 0 : 1 ] = *F;
4547 // // exclude a FACE common to E1 and E2 (put it to FFn[1] )
4548 // if ( FF1[0].IsSame( FF2[0]) || FF1[0].IsSame( FF2[1]))
4549 // std::swap( FF1[0], FF1[1] );
4550 // if ( FF2[0].IsSame( FF1[0]) )
4551 // std::swap( FF2[0], FF2[1] );
4552 // if ( FF1[0].IsNull() || FF2[0].IsNull() )
4555 // get a new normal for edge1
4557 gp_Vec dir1 = edge1->_normal, dir2 = edge2->_normal;
4558 // if ( edge1->_cosin < 0 )
4559 // dir1 = getFaceDir( FF1[0], E1, edge1->_nodes[0], helper, ok ).Normalized();
4560 // if ( edge2->_cosin < 0 )
4561 // dir2 = getFaceDir( FF2[0], E2, edge2->_nodes[0], helper, ok ).Normalized();
4563 double cos1 = Abs( edge1->_cosin ), cos2 = Abs( edge2->_cosin );
4564 double wgt1 = ( cos1 + 0.001 ) / ( cos1 + cos2 + 0.002 );
4565 double wgt2 = ( cos2 + 0.001 ) / ( cos1 + cos2 + 0.002 );
4566 newEdge._normal = ( wgt1 * dir1 + wgt2 * dir2 ).XYZ();
4567 newEdge._normal.Normalize();
4569 // cout << edge1->_nodes[0]->GetID() << " "
4570 // << edge2->_nodes[0]->GetID() << " NORM: "
4571 // << newEdge._normal.X() << ", " << newEdge._normal.Y() << ", " << newEdge._normal.Z() << endl;
4574 if ( cos1 < theMinSmoothCosin )
4576 newEdge._cosin = edge2->_cosin;
4578 else if ( cos2 > theMinSmoothCosin ) // both cos1 and cos2 > theMinSmoothCosin
4580 // gp_Vec dirInFace;
4581 // if ( edge1->_cosin < 0 )
4582 // dirInFace = dir1;
4584 // dirInFace = getFaceDir( FF1[0], E1, edge1->_nodes[0], helper, ok );
4585 // double angle = dirInFace.Angle( edge1->_normal ); // [0,PI]
4586 // edge1->SetCosin( Cos( angle ));
4587 //newEdge._cosin = 0; // ???????????
4588 newEdge._cosin = ( wgt1 * cos1 + wgt2 * cos2 ) * edge1->_cosin / cos1;
4592 newEdge._cosin = edge1->_cosin;
4595 // find shapes that need smoothing due to change of _normal
4596 if ( edge1->_cosin < theMinSmoothCosin &&
4597 newEdge._cosin > theMinSmoothCosin )
4599 if ( eos1->_sWOL.IsNull() )
4601 SMDS_ElemIteratorPtr fIt = edge1->_nodes[0]->GetInverseElementIterator(SMDSAbs_Face);
4602 while ( fIt->more() )
4603 shapesToSmooth.insert( data.GetShapeEdges( fIt->next()->getshapeId() ));
4604 //limitStepSize( data, fIt->next(), edge1->_cosin ); // too late
4606 else // edge1 inflates along a FACE
4608 TopoDS_Shape V = helper.GetSubShapeByNode( edge1->_nodes[0], getMeshDS() );
4609 PShapeIteratorPtr eIt = helper.GetAncestors( V, *_mesh, TopAbs_EDGE );
4610 while ( const TopoDS_Shape* E = eIt->next() )
4612 if ( !helper.IsSubShape( *E, /*FACE=*/eos1->_sWOL ))
4614 gp_Vec edgeDir = getEdgeDir( TopoDS::Edge( *E ), TopoDS::Vertex( V ));
4615 double angle = edgeDir.Angle( newEdge._normal ); // [0,PI]
4616 if ( angle < M_PI / 2 )
4617 shapesToSmooth.insert( data.GetShapeEdges( *E ));
4623 data.AddShapesToSmooth( shapesToSmooth );
4625 // Update data of edges depending on a new _normal
4627 for ( size_t iE = 0; iE < edge2newEdge.size(); ++iE )
4629 _LayerEdge* edge1 = edge2newEdge[ iE ].first;
4630 _LayerEdge& newEdge = edge2newEdge[ iE ].second;
4631 if ( !edge1 ) continue;
4632 _EdgesOnShape* eos1 = data.GetShapeEdges( edge1 );
4633 if ( !eos1 ) continue;
4635 edge1->_normal = newEdge._normal;
4636 edge1->SetCosin( newEdge._cosin );
4637 edge1->InvalidateStep( 1, *eos1 );
4639 edge1->SetNewLength( data._stepSize, *eos1, helper );
4640 if ( edge1->IsOnEdge() )
4642 const SMDS_MeshNode * n1 = edge1->_2neibors->srcNode(0);
4643 const SMDS_MeshNode * n2 = edge1->_2neibors->srcNode(1);
4644 edge1->SetDataByNeighbors( n1, n2, *eos1, helper );
4647 // Update normals and other dependent data of not intersecting _LayerEdge's
4648 // neighboring the intersecting ones
4650 if ( !edge1->_2neibors )
4652 for ( int j = 0; j < 2; ++j ) // loop on 2 neighbors
4654 _LayerEdge* neighbor = edge1->_2neibors->_edges[j];
4655 if ( edge2CloseEdge.count ( neighbor ))
4656 continue; // j-th neighbor is also intersected
4657 _EdgesOnShape* eos = data.GetShapeEdges( neighbor );
4658 if ( !eos ) continue;
4659 _LayerEdge* prevEdge = edge1;
4660 const int nbSteps = 10;
4661 for ( int step = nbSteps; step; --step ) // step from edge1 in j-th direction
4663 if ( !neighbor->_2neibors )
4664 break; // neighbor is on VERTEX
4666 _LayerEdge* nextEdge = neighbor->_2neibors->_edges[iNext];
4667 if ( nextEdge == prevEdge )
4668 nextEdge = neighbor->_2neibors->_edges[ ++iNext ];
4669 double r = double(step-1)/nbSteps;
4670 if ( !nextEdge->_2neibors )
4673 gp_XYZ newNorm = prevEdge->_normal * r + nextEdge->_normal * (1-r);
4674 newNorm.Normalize();
4676 neighbor->_normal = newNorm;
4677 neighbor->SetCosin( prevEdge->_cosin * r + nextEdge->_cosin * (1-r) );
4678 neighbor->SetDataByNeighbors( prevEdge->_nodes[0], nextEdge->_nodes[0], *eos, helper );
4680 neighbor->InvalidateStep( 1, *eos );
4682 neighbor->SetNewLength( data._stepSize, *eos, helper );
4684 // goto the next neighbor
4685 prevEdge = neighbor;
4686 neighbor = nextEdge;
4692 // 2) Check absence of intersections
4695 for ( size_t i = 0 ; i < tmpFaces.size(); ++i )
4701 //================================================================================
4703 * \brief Modify normals of _LayerEdge's on _ConvexFace's
4705 //================================================================================
4707 bool _ViscousBuilder::updateNormalsOfConvexFaces( _SolidData& data,
4708 SMESH_MesherHelper& helper,
4711 SMESHDS_Mesh* meshDS = helper.GetMeshDS();
4714 map< TGeomID, _ConvexFace >::iterator id2face = data._convexFaces.begin();
4715 for ( ; id2face != data._convexFaces.end(); ++id2face )
4717 _ConvexFace & convFace = (*id2face).second;
4718 if ( convFace._normalsFixed )
4719 continue; // already fixed
4720 if ( convFace.CheckPrisms() )
4721 continue; // nothing to fix
4723 convFace._normalsFixed = true;
4725 BRepAdaptor_Surface surface ( convFace._face, false );
4726 BRepLProp_SLProps surfProp( surface, 2, 1e-6 );
4728 // check if the convex FACE is of spherical shape
4730 Bnd_B3d centersBox; // bbox of centers of curvature of _LayerEdge's on VERTEXes
4734 map< TGeomID, _EdgesOnShape* >::iterator id2oes = convFace._subIdToEOS.begin();
4735 for ( ; id2oes != convFace._subIdToEOS.end(); ++id2oes )
4737 _EdgesOnShape& eos = *(id2oes->second);
4738 if ( eos.ShapeType() == TopAbs_VERTEX )
4740 _LayerEdge* ledge = eos._edges[ 0 ];
4741 if ( convFace.GetCenterOfCurvature( ledge, surfProp, helper, center ))
4742 centersBox.Add( center );
4744 for ( size_t i = 0; i < eos._edges.size(); ++i )
4745 nodesBox.Add( SMESH_TNodeXYZ( eos._edges[ i ]->_nodes[0] ));
4747 if ( centersBox.IsVoid() )
4749 debugMsg( "Error: centersBox.IsVoid()" );
4752 const bool isSpherical =
4753 ( centersBox.SquareExtent() < 1e-6 * nodesBox.SquareExtent() );
4755 int nbEdges = helper.Count( convFace._face, TopAbs_EDGE, /*ignoreSame=*/false );
4756 vector < _CentralCurveOnEdge > centerCurves( nbEdges );
4760 // set _LayerEdge::_normal as average of all normals
4762 // WARNING: different density of nodes on EDGEs is not taken into account that
4763 // can lead to an improper new normal
4765 gp_XYZ avgNormal( 0,0,0 );
4767 id2oes = convFace._subIdToEOS.begin();
4768 for ( ; id2oes != convFace._subIdToEOS.end(); ++id2oes )
4770 _EdgesOnShape& eos = *(id2oes->second);
4771 // set data of _CentralCurveOnEdge
4772 if ( eos.ShapeType() == TopAbs_EDGE )
4774 _CentralCurveOnEdge& ceCurve = centerCurves[ nbEdges++ ];
4775 ceCurve.SetShapes( TopoDS::Edge( eos._shape ), convFace, data, helper );
4776 if ( !eos._sWOL.IsNull() )
4777 ceCurve._adjFace.Nullify();
4779 ceCurve._ledges.insert( ceCurve._ledges.end(),
4780 eos._edges.begin(), eos._edges.end());
4782 // summarize normals
4783 for ( size_t i = 0; i < eos._edges.size(); ++i )
4784 avgNormal += eos._edges[ i ]->_normal;
4786 double normSize = avgNormal.SquareModulus();
4787 if ( normSize < 1e-200 )
4789 debugMsg( "updateNormalsOfConvexFaces(): zero avgNormal" );
4792 avgNormal /= Sqrt( normSize );
4794 // compute new _LayerEdge::_cosin on EDGEs
4795 double avgCosin = 0;
4798 for ( size_t iE = 0; iE < centerCurves.size(); ++iE )
4800 _CentralCurveOnEdge& ceCurve = centerCurves[ iE ];
4801 if ( ceCurve._adjFace.IsNull() )
4803 for ( size_t iLE = 0; iLE < ceCurve._ledges.size(); ++iLE )
4805 const SMDS_MeshNode* node = ceCurve._ledges[ iLE ]->_nodes[0];
4806 inFaceDir = getFaceDir( ceCurve._adjFace, ceCurve._edge, node, helper, isOK );
4809 double angle = inFaceDir.Angle( avgNormal ); // [0,PI]
4810 ceCurve._ledges[ iLE ]->_cosin = Cos( angle );
4811 avgCosin += ceCurve._ledges[ iLE ]->_cosin;
4817 avgCosin /= nbCosin;
4819 // set _LayerEdge::_normal = avgNormal
4820 id2oes = convFace._subIdToEOS.begin();
4821 for ( ; id2oes != convFace._subIdToEOS.end(); ++id2oes )
4823 _EdgesOnShape& eos = *(id2oes->second);
4824 if ( eos.ShapeType() != TopAbs_EDGE )
4825 for ( size_t i = 0; i < eos._edges.size(); ++i )
4826 eos._edges[ i ]->_cosin = avgCosin;
4828 for ( size_t i = 0; i < eos._edges.size(); ++i )
4829 eos._edges[ i ]->_normal = avgNormal;
4832 else // if ( isSpherical )
4834 // We suppose that centers of curvature at all points of the FACE
4835 // lie on some curve, let's call it "central curve". For all _LayerEdge's
4836 // having a common center of curvature we define the same new normal
4837 // as a sum of normals of _LayerEdge's on EDGEs among them.
4839 // get all centers of curvature for each EDGE
4841 helper.SetSubShape( convFace._face );
4842 _LayerEdge* vertexLEdges[2], **edgeLEdge, **edgeLEdgeEnd;
4844 TopExp_Explorer edgeExp( convFace._face, TopAbs_EDGE );
4845 for ( int iE = 0; edgeExp.More(); edgeExp.Next(), ++iE )
4847 const TopoDS_Edge& edge = TopoDS::Edge( edgeExp.Current() );
4849 // set adjacent FACE
4850 centerCurves[ iE ].SetShapes( edge, convFace, data, helper );
4852 // get _LayerEdge's of the EDGE
4853 TGeomID edgeID = meshDS->ShapeToIndex( edge );
4854 _EdgesOnShape* eos = data.GetShapeEdges( edgeID );
4855 if ( !eos || eos->_edges.empty() )
4857 // no _LayerEdge's on EDGE, use _LayerEdge's on VERTEXes
4858 for ( int iV = 0; iV < 2; ++iV )
4860 TopoDS_Vertex v = helper.IthVertex( iV, edge );
4861 TGeomID vID = meshDS->ShapeToIndex( v );
4862 eos = data.GetShapeEdges( vID );
4863 vertexLEdges[ iV ] = eos->_edges[ 0 ];
4865 edgeLEdge = &vertexLEdges[0];
4866 edgeLEdgeEnd = edgeLEdge + 2;
4868 centerCurves[ iE ]._adjFace.Nullify();
4872 if ( ! eos->_toSmooth )
4873 data.SortOnEdge( edge, eos->_edges, helper );
4874 edgeLEdge = &eos->_edges[ 0 ];
4875 edgeLEdgeEnd = edgeLEdge + eos->_edges.size();
4876 vertexLEdges[0] = eos->_edges.front()->_2neibors->_edges[0];
4877 vertexLEdges[1] = eos->_edges.back() ->_2neibors->_edges[1];
4879 if ( ! eos->_sWOL.IsNull() )
4880 centerCurves[ iE ]._adjFace.Nullify();
4883 // Get curvature centers
4887 if ( edgeLEdge[0]->IsOnEdge() &&
4888 convFace.GetCenterOfCurvature( vertexLEdges[0], surfProp, helper, center ))
4890 centerCurves[ iE ].Append( center, vertexLEdges[0] );
4891 centersBox.Add( center );
4893 for ( ; edgeLEdge < edgeLEdgeEnd; ++edgeLEdge )
4894 if ( convFace.GetCenterOfCurvature( *edgeLEdge, surfProp, helper, center ))
4895 { // EDGE or VERTEXes
4896 centerCurves[ iE ].Append( center, *edgeLEdge );
4897 centersBox.Add( center );
4899 if ( edgeLEdge[-1]->IsOnEdge() &&
4900 convFace.GetCenterOfCurvature( vertexLEdges[1], surfProp, helper, center ))
4902 centerCurves[ iE ].Append( center, vertexLEdges[1] );
4903 centersBox.Add( center );
4905 centerCurves[ iE ]._isDegenerated =
4906 ( centersBox.IsVoid() || centersBox.SquareExtent() < 1e-6 * nodesBox.SquareExtent() );
4908 } // loop on EDGES of convFace._face to set up data of centerCurves
4910 // Compute new normals for _LayerEdge's on EDGEs
4912 double avgCosin = 0;
4915 for ( size_t iE1 = 0; iE1 < centerCurves.size(); ++iE1 )
4917 _CentralCurveOnEdge& ceCurve = centerCurves[ iE1 ];
4918 if ( ceCurve._isDegenerated )
4920 const vector< gp_Pnt >& centers = ceCurve._curvaCenters;
4921 vector< gp_XYZ > & newNormals = ceCurve._normals;
4922 for ( size_t iC1 = 0; iC1 < centers.size(); ++iC1 )
4925 for ( size_t iE2 = 0; iE2 < centerCurves.size() && !isOK; ++iE2 )
4928 isOK = centerCurves[ iE2 ].FindNewNormal( centers[ iC1 ], newNormals[ iC1 ]);
4930 if ( isOK && !ceCurve._adjFace.IsNull() )
4932 // compute new _LayerEdge::_cosin
4933 const SMDS_MeshNode* node = ceCurve._ledges[ iC1 ]->_nodes[0];
4934 inFaceDir = getFaceDir( ceCurve._adjFace, ceCurve._edge, node, helper, isOK );
4937 double angle = inFaceDir.Angle( newNormals[ iC1 ] ); // [0,PI]
4938 ceCurve._ledges[ iC1 ]->_cosin = Cos( angle );
4939 avgCosin += ceCurve._ledges[ iC1 ]->_cosin;
4945 // set new normals to _LayerEdge's of NOT degenerated central curves
4946 for ( size_t iE = 0; iE < centerCurves.size(); ++iE )
4948 if ( centerCurves[ iE ]._isDegenerated )
4950 for ( size_t iLE = 0; iLE < centerCurves[ iE ]._ledges.size(); ++iLE )
4951 centerCurves[ iE ]._ledges[ iLE ]->_normal = centerCurves[ iE ]._normals[ iLE ];
4953 // set new normals to _LayerEdge's of degenerated central curves
4954 for ( size_t iE = 0; iE < centerCurves.size(); ++iE )
4956 if ( !centerCurves[ iE ]._isDegenerated ||
4957 centerCurves[ iE ]._ledges.size() < 3 )
4959 // new normal is an average of new normals at VERTEXes that
4960 // was computed on non-degenerated _CentralCurveOnEdge's
4961 gp_XYZ newNorm = ( centerCurves[ iE ]._ledges.front()->_normal +
4962 centerCurves[ iE ]._ledges.back ()->_normal );
4963 double sz = newNorm.Modulus();
4967 double newCosin = ( 0.5 * centerCurves[ iE ]._ledges.front()->_cosin +
4968 0.5 * centerCurves[ iE ]._ledges.back ()->_cosin );
4969 for ( size_t iLE = 1, nb = centerCurves[ iE ]._ledges.size() - 1; iLE < nb; ++iLE )
4971 centerCurves[ iE ]._ledges[ iLE ]->_normal = newNorm;
4972 centerCurves[ iE ]._ledges[ iLE ]->_cosin = newCosin;
4976 // Find new normals for _LayerEdge's based on FACE
4979 avgCosin /= nbCosin;
4980 const TGeomID faceID = meshDS->ShapeToIndex( convFace._face );
4981 map< TGeomID, _EdgesOnShape* >::iterator id2oes = convFace._subIdToEOS.find( faceID );
4982 if ( id2oes != convFace._subIdToEOS.end() )
4986 _EdgesOnShape& eos = * ( id2oes->second );
4987 for ( size_t i = 0; i < eos._edges.size(); ++i )
4989 _LayerEdge* ledge = eos._edges[ i ];
4990 if ( !convFace.GetCenterOfCurvature( ledge, surfProp, helper, center ))
4992 for ( size_t i = 0; i < centerCurves.size(); ++i, ++iE )
4994 iE = iE % centerCurves.size();
4995 if ( centerCurves[ iE ]._isDegenerated )
4997 newNorm.SetCoord( 0,0,0 );
4998 if ( centerCurves[ iE ].FindNewNormal( center, newNorm ))
5000 ledge->_normal = newNorm;
5001 ledge->_cosin = avgCosin;
5008 } // not a quasi-spherical FACE
5010 // Update _LayerEdge's data according to a new normal
5012 dumpFunction(SMESH_Comment("updateNormalsOfConvexFaces")<<data._index
5013 <<"_F"<<meshDS->ShapeToIndex( convFace._face ));
5015 id2oes = convFace._subIdToEOS.begin();
5016 for ( ; id2oes != convFace._subIdToEOS.end(); ++id2oes )
5018 _EdgesOnShape& eos = * ( id2oes->second );
5019 for ( size_t i = 0; i < eos._edges.size(); ++i )
5021 _LayerEdge* & ledge = eos._edges[ i ];
5022 double len = ledge->_len;
5023 ledge->InvalidateStep( stepNb + 1, eos, /*restoreLength=*/true );
5024 ledge->SetCosin( ledge->_cosin );
5025 ledge->SetNewLength( len, eos, helper );
5028 } // loop on sub-shapes of convFace._face
5030 // Find FACEs adjacent to convFace._face that got necessity to smooth
5031 // as a result of normals modification
5033 set< _EdgesOnShape* > adjFacesToSmooth;
5034 for ( size_t iE = 0; iE < centerCurves.size(); ++iE )
5036 if ( centerCurves[ iE ]._adjFace.IsNull() ||
5037 centerCurves[ iE ]._adjFaceToSmooth )
5039 for ( size_t iLE = 0; iLE < centerCurves[ iE ]._ledges.size(); ++iLE )
5041 if ( centerCurves[ iE ]._ledges[ iLE ]->_cosin > theMinSmoothCosin )
5043 adjFacesToSmooth.insert( data.GetShapeEdges( centerCurves[ iE ]._adjFace ));
5048 data.AddShapesToSmooth( adjFacesToSmooth );
5053 } // loop on data._convexFaces
5058 //================================================================================
5060 * \brief Finds a center of curvature of a surface at a _LayerEdge
5062 //================================================================================
5064 bool _ConvexFace::GetCenterOfCurvature( _LayerEdge* ledge,
5065 BRepLProp_SLProps& surfProp,
5066 SMESH_MesherHelper& helper,
5067 gp_Pnt & center ) const
5069 gp_XY uv = helper.GetNodeUV( _face, ledge->_nodes[0] );
5070 surfProp.SetParameters( uv.X(), uv.Y() );
5071 if ( !surfProp.IsCurvatureDefined() )
5074 const double oriFactor = ( _face.Orientation() == TopAbs_REVERSED ? +1. : -1. );
5075 double surfCurvatureMax = surfProp.MaxCurvature() * oriFactor;
5076 double surfCurvatureMin = surfProp.MinCurvature() * oriFactor;
5077 if ( surfCurvatureMin > surfCurvatureMax )
5078 center = surfProp.Value().Translated( surfProp.Normal().XYZ() / surfCurvatureMin * oriFactor );
5080 center = surfProp.Value().Translated( surfProp.Normal().XYZ() / surfCurvatureMax * oriFactor );
5085 //================================================================================
5087 * \brief Check that prisms are not distorted
5089 //================================================================================
5091 bool _ConvexFace::CheckPrisms() const
5094 for ( size_t i = 0; i < _simplexTestEdges.size(); ++i )
5096 const _LayerEdge* edge = _simplexTestEdges[i];
5097 SMESH_TNodeXYZ tgtXYZ( edge->_nodes.back() );
5098 for ( size_t j = 0; j < edge->_simplices.size(); ++j )
5099 if ( !edge->_simplices[j].IsForward( edge->_nodes[0], &tgtXYZ, vol ))
5101 debugMsg( "Bad simplex of _simplexTestEdges ("
5102 << " "<< edge->_nodes[0]->GetID()<< " "<< tgtXYZ._node->GetID()
5103 << " "<< edge->_simplices[j]._nPrev->GetID()
5104 << " "<< edge->_simplices[j]._nNext->GetID() << " )" );
5111 //================================================================================
5113 * \brief Try to compute a new normal by interpolating normals of _LayerEdge's
5114 * stored in this _CentralCurveOnEdge.
5115 * \param [in] center - curvature center of a point of another _CentralCurveOnEdge.
5116 * \param [in,out] newNormal - current normal at this point, to be redefined
5117 * \return bool - true if succeeded.
5119 //================================================================================
5121 bool _CentralCurveOnEdge::FindNewNormal( const gp_Pnt& center, gp_XYZ& newNormal )
5123 if ( this->_isDegenerated )
5126 // find two centers the given one lies between
5128 for ( size_t i = 0, nb = _curvaCenters.size()-1; i < nb; ++i )
5130 double sl2 = 1.001 * _segLength2[ i ];
5132 double d1 = center.SquareDistance( _curvaCenters[ i ]);
5136 double d2 = center.SquareDistance( _curvaCenters[ i+1 ]);
5137 if ( d2 > sl2 || d2 + d1 < 1e-100 )
5142 double r = d1 / ( d1 + d2 );
5143 gp_XYZ norm = (( 1. - r ) * _ledges[ i ]->_normal +
5144 ( r ) * _ledges[ i+1 ]->_normal );
5148 double sz = newNormal.Modulus();
5157 //================================================================================
5159 * \brief Set shape members
5161 //================================================================================
5163 void _CentralCurveOnEdge::SetShapes( const TopoDS_Edge& edge,
5164 const _ConvexFace& convFace,
5166 SMESH_MesherHelper& helper)
5170 PShapeIteratorPtr fIt = helper.GetAncestors( edge, *helper.GetMesh(), TopAbs_FACE );
5171 while ( const TopoDS_Shape* F = fIt->next())
5172 if ( !convFace._face.IsSame( *F ))
5174 _adjFace = TopoDS::Face( *F );
5175 _adjFaceToSmooth = false;
5176 // _adjFace already in a smoothing queue ?
5177 if ( _EdgesOnShape* eos = data.GetShapeEdges( _adjFace ))
5178 _adjFaceToSmooth = eos->_toSmooth;
5183 //================================================================================
5185 * \brief Looks for intersection of it's last segment with faces
5186 * \param distance - returns shortest distance from the last node to intersection
5188 //================================================================================
5190 bool _LayerEdge::FindIntersection( SMESH_ElementSearcher& searcher,
5192 const double& epsilon,
5194 const SMDS_MeshElement** face)
5196 vector< const SMDS_MeshElement* > suspectFaces;
5198 gp_Ax1 lastSegment = LastSegment( segLen, eos );
5199 searcher.GetElementsNearLine( lastSegment, SMDSAbs_Face, suspectFaces );
5201 bool segmentIntersected = false;
5202 distance = Precision::Infinite();
5203 int iFace = -1; // intersected face
5204 for ( size_t j = 0 ; j < suspectFaces.size() /*&& !segmentIntersected*/; ++j )
5206 const SMDS_MeshElement* face = suspectFaces[j];
5207 if ( face->GetNodeIndex( _nodes.back() ) >= 0 ||
5208 face->GetNodeIndex( _nodes[0] ) >= 0 )
5209 continue; // face sharing _LayerEdge node
5210 const int nbNodes = face->NbCornerNodes();
5211 bool intFound = false;
5213 SMDS_MeshElement::iterator nIt = face->begin_nodes();
5216 intFound = SegTriaInter( lastSegment, *nIt++, *nIt++, *nIt++, dist, epsilon );
5220 const SMDS_MeshNode* tria[3];
5223 for ( int n2 = 2; n2 < nbNodes && !intFound; ++n2 )
5226 intFound = SegTriaInter(lastSegment, tria[0], tria[1], tria[2], dist, epsilon );
5232 if ( dist < segLen*(1.01) && dist > -(_len*_lenFactor-segLen) )
5233 segmentIntersected = true;
5234 if ( distance > dist )
5235 distance = dist, iFace = j;
5238 if ( iFace != -1 && face ) *face = suspectFaces[iFace];
5240 if ( segmentIntersected )
5243 SMDS_MeshElement::iterator nIt = suspectFaces[iFace]->begin_nodes();
5244 gp_XYZ intP( lastSegment.Location().XYZ() + lastSegment.Direction().XYZ() * distance );
5245 cout << "nodes: tgt " << _nodes.back()->GetID() << " src " << _nodes[0]->GetID()
5246 << ", intersection with face ("
5247 << (*nIt++)->GetID()<<" "<< (*nIt++)->GetID()<<" "<< (*nIt++)->GetID()
5248 << ") at point (" << intP.X() << ", " << intP.Y() << ", " << intP.Z()
5249 << ") distance = " << distance - segLen<< endl;
5255 return segmentIntersected;
5258 //================================================================================
5260 * \brief Returns size and direction of the last segment
5262 //================================================================================
5264 gp_Ax1 _LayerEdge::LastSegment(double& segLen, _EdgesOnShape& eos) const
5266 // find two non-coincident positions
5267 gp_XYZ orig = _pos.back();
5269 int iPrev = _pos.size() - 2;
5270 const double tol = ( _len > 0 ) ? 0.3*_len : 1e-100; // adjusted for IPAL52478 + PAL22576
5271 while ( iPrev >= 0 )
5273 dir = orig - _pos[iPrev];
5274 if ( dir.SquareModulus() > tol*tol )
5284 segDir.SetLocation( SMESH_TNodeXYZ( _nodes[0] ));
5285 segDir.SetDirection( _normal );
5290 gp_Pnt pPrev = _pos[ iPrev ];
5291 if ( !eos._sWOL.IsNull() )
5293 TopLoc_Location loc;
5294 if ( eos.SWOLType() == TopAbs_EDGE )
5297 Handle(Geom_Curve) curve = BRep_Tool::Curve( TopoDS::Edge( eos._sWOL ), loc, f,l);
5298 pPrev = curve->Value( pPrev.X() ).Transformed( loc );
5302 Handle(Geom_Surface) surface = BRep_Tool::Surface( TopoDS::Face( eos._sWOL ), loc );
5303 pPrev = surface->Value( pPrev.X(), pPrev.Y() ).Transformed( loc );
5305 dir = SMESH_TNodeXYZ( _nodes.back() ) - pPrev.XYZ();
5307 segDir.SetLocation( pPrev );
5308 segDir.SetDirection( dir );
5309 segLen = dir.Modulus();
5315 //================================================================================
5317 * \brief Return the last position of the target node on a FACE.
5318 * \param [in] F - the FACE this _LayerEdge is inflated along
5319 * \return gp_XY - result UV
5321 //================================================================================
5323 gp_XY _LayerEdge::LastUV( const TopoDS_Face& F, _EdgesOnShape& eos ) const
5325 if ( F.IsSame( eos._sWOL )) // F is my FACE
5326 return gp_XY( _pos.back().X(), _pos.back().Y() );
5328 if ( eos.SWOLType() != TopAbs_EDGE ) // wrong call
5329 return gp_XY( 1e100, 1e100 );
5331 // _sWOL is EDGE of F; _pos.back().X() is the last U on the EDGE
5332 double f, l, u = _pos.back().X();
5333 Handle(Geom2d_Curve) C2d = BRep_Tool::CurveOnSurface( TopoDS::Edge(eos._sWOL), F, f,l);
5334 if ( !C2d.IsNull() && f <= u && u <= l )
5335 return C2d->Value( u ).XY();
5337 return gp_XY( 1e100, 1e100 );
5340 //================================================================================
5342 * \brief Test intersection of the last segment with a given triangle
5343 * using Moller-Trumbore algorithm
5344 * Intersection is detected if distance to intersection is less than _LayerEdge._len
5346 //================================================================================
5348 bool _LayerEdge::SegTriaInter( const gp_Ax1& lastSegment,
5349 const SMDS_MeshNode* n0,
5350 const SMDS_MeshNode* n1,
5351 const SMDS_MeshNode* n2,
5353 const double& EPSILON) const
5355 //const double EPSILON = 1e-6;
5357 const gp_Pnt& orig = lastSegment.Location();
5358 const gp_Dir& dir = lastSegment.Direction();
5360 SMESH_TNodeXYZ vert0( n0 );
5361 SMESH_TNodeXYZ vert1( n1 );
5362 SMESH_TNodeXYZ vert2( n2 );
5364 /* calculate distance from vert0 to ray origin */
5365 gp_XYZ tvec = orig.XYZ() - vert0;
5367 //if ( tvec * dir > EPSILON )
5368 // intersected face is at back side of the temporary face this _LayerEdge belongs to
5371 gp_XYZ edge1 = vert1 - vert0;
5372 gp_XYZ edge2 = vert2 - vert0;
5374 /* begin calculating determinant - also used to calculate U parameter */
5375 gp_XYZ pvec = dir.XYZ() ^ edge2;
5377 /* if determinant is near zero, ray lies in plane of triangle */
5378 double det = edge1 * pvec;
5380 if (det > -EPSILON && det < EPSILON)
5383 /* calculate U parameter and test bounds */
5384 double u = ( tvec * pvec ) / det;
5385 //if (u < 0.0 || u > 1.0)
5386 if (u < -EPSILON || u > 1.0 + EPSILON)
5389 /* prepare to test V parameter */
5390 gp_XYZ qvec = tvec ^ edge1;
5392 /* calculate V parameter and test bounds */
5393 double v = (dir.XYZ() * qvec) / det;
5394 //if ( v < 0.0 || u + v > 1.0 )
5395 if ( v < -EPSILON || u + v > 1.0 + EPSILON)
5398 /* calculate t, ray intersects triangle */
5399 t = (edge2 * qvec) / det;
5405 //================================================================================
5407 * \brief Perform smooth of _LayerEdge's based on EDGE's
5408 * \retval bool - true if node has been moved
5410 //================================================================================
5412 bool _LayerEdge::SmoothOnEdge(Handle(Geom_Surface)& surface,
5413 const TopoDS_Face& F,
5414 SMESH_MesherHelper& helper)
5416 ASSERT( IsOnEdge() );
5418 SMDS_MeshNode* tgtNode = const_cast<SMDS_MeshNode*>( _nodes.back() );
5419 SMESH_TNodeXYZ oldPos( tgtNode );
5420 double dist01, distNewOld;
5422 SMESH_TNodeXYZ p0( _2neibors->tgtNode(0));
5423 SMESH_TNodeXYZ p1( _2neibors->tgtNode(1));
5424 dist01 = p0.Distance( _2neibors->tgtNode(1) );
5426 gp_Pnt newPos = p0 * _2neibors->_wgt[0] + p1 * _2neibors->_wgt[1];
5427 double lenDelta = 0;
5430 //lenDelta = _curvature->lenDelta( _len );
5431 lenDelta = _curvature->lenDeltaByDist( dist01 );
5432 newPos.ChangeCoord() += _normal * lenDelta;
5435 distNewOld = newPos.Distance( oldPos );
5439 if ( _2neibors->_plnNorm )
5441 // put newPos on the plane defined by source node and _plnNorm
5442 gp_XYZ new2src = SMESH_TNodeXYZ( _nodes[0] ) - newPos.XYZ();
5443 double new2srcProj = (*_2neibors->_plnNorm) * new2src;
5444 newPos.ChangeCoord() += (*_2neibors->_plnNorm) * new2srcProj;
5446 tgtNode->setXYZ( newPos.X(), newPos.Y(), newPos.Z() );
5447 _pos.back() = newPos.XYZ();
5451 tgtNode->setXYZ( newPos.X(), newPos.Y(), newPos.Z() );
5452 gp_XY uv( Precision::Infinite(), 0 );
5453 helper.CheckNodeUV( F, tgtNode, uv, 1e-10, /*force=*/true );
5454 _pos.back().SetCoord( uv.X(), uv.Y(), 0 );
5456 newPos = surface->Value( uv.X(), uv.Y() );
5457 tgtNode->setXYZ( newPos.X(), newPos.Y(), newPos.Z() );
5460 // commented for IPAL0052478
5461 // if ( _curvature && lenDelta < 0 )
5463 // gp_Pnt prevPos( _pos[ _pos.size()-2 ]);
5464 // _len -= prevPos.Distance( oldPos );
5465 // _len += prevPos.Distance( newPos );
5467 bool moved = distNewOld > dist01/50;
5469 dumpMove( tgtNode ); // debug
5474 //================================================================================
5476 * \brief Perform laplacian smooth in 3D of nodes inflated from FACE
5477 * \retval bool - true if _tgtNode has been moved
5479 //================================================================================
5481 int _LayerEdge::Smooth(const int step, const bool isConcaveFace, const bool findBest )
5483 if ( _simplices.size() < 2 )
5484 return 0; // _LayerEdge inflated along EDGE or FACE
5486 const gp_XYZ& curPos ( _pos.back() );
5487 const gp_XYZ& prevPos( _pos[ _pos.size()-2 ]);
5489 // quality metrics (orientation) of tetras around _tgtNode
5491 double vol, minVolBefore = 1e100;
5492 for ( size_t i = 0; i < _simplices.size(); ++i )
5494 nbOkBefore += _simplices[i].IsForward( _nodes[0], &curPos, vol );
5495 minVolBefore = Min( minVolBefore, vol );
5497 int nbBad = _simplices.size() - nbOkBefore;
5499 // compute new position for the last _pos using different _funs
5501 for ( int iFun = -1; iFun < theNbSmooFuns; ++iFun )
5504 newPos = (this->*_smooFunction)(); // fun chosen by ChooseSmooFunction()
5505 else if ( _funs[ iFun ] == _smooFunction )
5506 continue; // _smooFunction again
5507 else if ( step > 0 )
5508 newPos = (this->*_funs[ iFun ])(); // try other smoothing fun
5510 break; // let "easy" functions improve elements around distorted ones
5514 double delta = _curvature->lenDelta( _len );
5516 newPos += _normal * delta;
5519 double segLen = _normal * ( newPos - prevPos );
5520 if ( segLen + delta > 0 )
5521 newPos += _normal * delta;
5523 // double segLenChange = _normal * ( curPos - newPos );
5524 // newPos += 0.5 * _normal * segLenChange;
5528 double minVolAfter = 1e100;
5529 for ( size_t i = 0; i < _simplices.size(); ++i )
5531 nbOkAfter += _simplices[i].IsForward( _nodes[0], &newPos, vol );
5532 minVolAfter = Min( minVolAfter, vol );
5535 if ( nbOkAfter < nbOkBefore )
5537 if (( isConcaveFace || findBest ) &&
5538 ( nbOkAfter == nbOkBefore ) &&
5539 //( iFun > -1 || nbOkAfter < _simplices.size() ) &&
5540 ( minVolAfter <= minVolBefore ))
5543 SMDS_MeshNode* n = const_cast< SMDS_MeshNode* >( _nodes.back() );
5545 // commented for IPAL0052478
5546 // _len -= prevPos.Distance(SMESH_TNodeXYZ( n ));
5547 // _len += prevPos.Distance(newPos);
5549 n->setXYZ( newPos.X(), newPos.Y(), newPos.Z());
5550 _pos.back() = newPos;
5551 dumpMoveComm( n, _funNames[ iFun < 0 ? smooFunID() : iFun ]);
5553 nbBad = _simplices.size() - nbOkAfter;
5557 //_smooFunction = _funs[ iFun ];
5558 // cout << "# " << _funNames[ iFun ] << "\t N:" << _nodes.back()->GetID()
5559 // << "\t nbBad: " << _simplices.size() - nbOkAfter
5560 // << " minVol: " << minVolAfter
5561 // << " " << newPos.X() << " " << newPos.Y() << " " << newPos.Z()
5563 minVolBefore = minVolAfter;
5564 nbOkBefore = nbOkAfter;
5565 continue; // look for a better function
5571 } // loop on smoothing functions
5576 //================================================================================
5578 * \brief Chooses a smoothing technic giving a position most close to an initial one.
5579 * For a correct result, _simplices must contain nodes lying on geometry.
5581 //================================================================================
5583 void _LayerEdge::ChooseSmooFunction( const set< TGeomID >& concaveVertices,
5584 const TNode2Edge& n2eMap)
5586 if ( _smooFunction ) return;
5588 // use smoothNefPolygon() near concaveVertices
5589 if ( !concaveVertices.empty() )
5591 for ( size_t i = 0; i < _simplices.size(); ++i )
5593 if ( concaveVertices.count( _simplices[i]._nPrev->getshapeId() ))
5595 _smooFunction = _funs[ FUN_NEFPOLY ];
5597 // set FUN_CENTROIDAL to neighbor edges
5598 TNode2Edge::const_iterator n2e;
5599 for ( i = 0; i < _simplices.size(); ++i )
5601 if (( _simplices[i]._nPrev->GetPosition()->GetDim() == 2 ) &&
5602 (( n2e = n2eMap.find( _simplices[i]._nPrev )) != n2eMap.end() ))
5604 n2e->second->_smooFunction = _funs[ FUN_CENTROIDAL ];
5612 // this coice is done only if ( !concaveVertices.empty() ) for Grids/smesh/bugs_19/X1
5613 // where the nodes are smoothed too far along a sphere thus creating
5614 // inverted _simplices
5615 double dist[theNbSmooFuns];
5616 //double coef[theNbSmooFuns] = { 1., 1.2, 1.4, 1.4 };
5617 double coef[theNbSmooFuns] = { 1., 1., 1., 1. };
5619 double minDist = Precision::Infinite();
5620 gp_Pnt p = SMESH_TNodeXYZ( _nodes[0] );
5621 for ( int i = 0; i < FUN_NEFPOLY; ++i )
5623 gp_Pnt newP = (this->*_funs[i])();
5624 dist[i] = p.SquareDistance( newP );
5625 if ( dist[i]*coef[i] < minDist )
5627 _smooFunction = _funs[i];
5628 minDist = dist[i]*coef[i];
5634 _smooFunction = _funs[ FUN_LAPLACIAN ];
5637 // for ( size_t i = 0; i < _simplices.size(); ++i )
5638 // minDim = Min( minDim, _simplices[i]._nPrev->GetPosition()->GetDim() );
5639 // if ( minDim == 0 )
5640 // _smooFunction = _funs[ FUN_CENTROIDAL ];
5641 // else if ( minDim == 1 )
5642 // _smooFunction = _funs[ FUN_CENTROIDAL ];
5646 // for ( int i = 0; i < FUN_NB; ++i )
5648 // //cout << dist[i] << " ";
5649 // if ( _smooFunction == _funs[i] ) {
5651 // //debugMsg( fNames[i] );
5655 // cout << _funNames[ iMin ] << "\t N:" << _nodes.back()->GetID() << endl;
5658 //================================================================================
5660 * \brief Returns a name of _SmooFunction
5662 //================================================================================
5664 int _LayerEdge::smooFunID( _LayerEdge::PSmooFun fun) const
5667 fun = _smooFunction;
5668 for ( int i = 0; i < theNbSmooFuns; ++i )
5669 if ( fun == _funs[i] )
5672 return theNbSmooFuns;
5675 //================================================================================
5677 * \brief Computes a new node position using Laplacian smoothing
5679 //================================================================================
5681 gp_XYZ _LayerEdge::smoothLaplacian()
5683 gp_XYZ newPos (0,0,0);
5684 for ( size_t i = 0; i < _simplices.size(); ++i )
5685 newPos += SMESH_TNodeXYZ( _simplices[i]._nPrev );
5686 newPos /= _simplices.size();
5691 //================================================================================
5693 * \brief Computes a new node position using angular-based smoothing
5695 //================================================================================
5697 gp_XYZ _LayerEdge::smoothAngular()
5699 vector< gp_Vec > edgeDir; edgeDir. reserve( _simplices.size() + 1);
5700 vector< double > edgeSize; edgeSize.reserve( _simplices.size() );
5701 vector< gp_XYZ > points; points. reserve( _simplices.size() );
5703 gp_XYZ pPrev = SMESH_TNodeXYZ( _simplices.back()._nPrev );
5705 for ( size_t i = 0; i < _simplices.size(); ++i )
5707 gp_XYZ p = SMESH_TNodeXYZ( _simplices[i]._nPrev );
5708 edgeDir.push_back( p - pPrev );
5709 edgeSize.push_back( edgeDir.back().Magnitude() );
5710 //double edgeSize = edgeDir.back().Magnitude();
5711 if ( edgeSize.back() < numeric_limits<double>::min() )
5714 edgeSize.pop_back();
5718 edgeDir.back() /= edgeSize.back();
5719 points.push_back( p );
5724 edgeDir.push_back ( edgeDir[0] );
5725 edgeSize.push_back( edgeSize[0] );
5726 pN /= points.size();
5728 gp_XYZ newPos(0,0,0);
5729 //gp_XYZ pN = SMESH_TNodeXYZ( _nodes.back() );
5731 for ( size_t i = 0; i < points.size(); ++i )
5733 gp_Vec toN( pN - points[i]);
5734 double toNLen = toN.Magnitude();
5735 if ( toNLen < numeric_limits<double>::min() )
5740 gp_Vec bisec = edgeDir[i] + edgeDir[i+1];
5741 double bisecLen = bisec.SquareMagnitude();
5742 if ( bisecLen < numeric_limits<double>::min() )
5744 gp_Vec norm = edgeDir[i] ^ toN;
5745 bisec = norm ^ edgeDir[i];
5746 bisecLen = bisec.SquareMagnitude();
5748 bisecLen = Sqrt( bisecLen );
5753 gp_XYZ pNew = ( points[i] + bisec.XYZ() * toNLen ) * bisecLen;
5754 sumSize += bisecLen;
5756 gp_XYZ pNew = ( points[i] + bisec.XYZ() * toNLen ) * ( edgeSize[i] + edgeSize[i+1] );
5757 sumSize += ( edgeSize[i] + edgeSize[i+1] );
5766 //================================================================================
5768 * \brief Computes a new node position using weigthed node positions
5770 //================================================================================
5772 gp_XYZ _LayerEdge::smoothLengthWeighted()
5774 vector< double > edgeSize; edgeSize.reserve( _simplices.size() + 1);
5775 vector< gp_XYZ > points; points. reserve( _simplices.size() );
5777 gp_XYZ pPrev = SMESH_TNodeXYZ( _simplices.back()._nPrev );
5778 for ( size_t i = 0; i < _simplices.size(); ++i )
5780 gp_XYZ p = SMESH_TNodeXYZ( _simplices[i]._nPrev );
5781 edgeSize.push_back( ( p - pPrev ).Modulus() );
5782 if ( edgeSize.back() < numeric_limits<double>::min() )
5784 edgeSize.pop_back();
5788 points.push_back( p );
5792 edgeSize.push_back( edgeSize[0] );
5794 gp_XYZ newPos(0,0,0);
5796 for ( size_t i = 0; i < points.size(); ++i )
5798 newPos += points[i] * ( edgeSize[i] + edgeSize[i+1] );
5799 sumSize += edgeSize[i] + edgeSize[i+1];
5805 //================================================================================
5807 * \brief Computes a new node position using angular-based smoothing
5809 //================================================================================
5811 gp_XYZ _LayerEdge::smoothCentroidal()
5813 gp_XYZ newPos(0,0,0);
5814 gp_XYZ pN = SMESH_TNodeXYZ( _nodes.back() );
5816 for ( size_t i = 0; i < _simplices.size(); ++i )
5818 gp_XYZ p1 = SMESH_TNodeXYZ( _simplices[i]._nPrev );
5819 gp_XYZ p2 = SMESH_TNodeXYZ( _simplices[i]._nNext );
5820 gp_XYZ gc = ( pN + p1 + p2 ) / 3.;
5821 double size = (( p1 - pN ) ^ ( p2 - pN )).Modulus();
5824 newPos += gc * size;
5831 //================================================================================
5833 * \brief Computes a new node position located inside a Nef polygon
5835 //================================================================================
5837 gp_XYZ _LayerEdge::smoothNefPolygon()
5839 gp_XYZ newPos(0,0,0);
5841 // get a plane to seach a solution on
5843 vector< gp_XYZ > vecs( _simplices.size() + 1 );
5845 const double tol = numeric_limits<double>::min();
5846 gp_XYZ center(0,0,0);
5847 for ( i = 0; i < _simplices.size(); ++i )
5849 vecs[i] = ( SMESH_TNodeXYZ( _simplices[i]._nNext ) -
5850 SMESH_TNodeXYZ( _simplices[i]._nPrev ));
5851 center += SMESH_TNodeXYZ( _simplices[i]._nPrev );
5853 vecs.back() = vecs[0];
5854 center /= _simplices.size();
5856 gp_XYZ zAxis(0,0,0);
5857 for ( i = 0; i < _simplices.size(); ++i )
5858 zAxis += vecs[i] ^ vecs[i+1];
5861 for ( i = 0; i < _simplices.size(); ++i )
5864 if ( yAxis.SquareModulus() > tol )
5867 gp_XYZ xAxis = yAxis ^ zAxis;
5868 // SMESH_TNodeXYZ p0( _simplices[0]._nPrev );
5869 // const double tol = 1e-6 * ( p0.Distance( _simplices[1]._nPrev ) +
5870 // p0.Distance( _simplices[2]._nPrev ));
5871 // gp_XYZ center = smoothLaplacian();
5872 // gp_XYZ xAxis, yAxis, zAxis;
5873 // for ( i = 0; i < _simplices.size(); ++i )
5875 // xAxis = SMESH_TNodeXYZ( _simplices[i]._nPrev ) - center;
5876 // if ( xAxis.SquareModulus() > tol*tol )
5879 // for ( i = 1; i < _simplices.size(); ++i )
5881 // yAxis = SMESH_TNodeXYZ( _simplices[i]._nPrev ) - center;
5882 // zAxis = xAxis ^ yAxis;
5883 // if ( zAxis.SquareModulus() > tol*tol )
5886 // if ( i == _simplices.size() ) return newPos;
5888 yAxis = zAxis ^ xAxis;
5889 xAxis /= xAxis.Modulus();
5890 yAxis /= yAxis.Modulus();
5892 // get half-planes of _simplices
5894 vector< _halfPlane > halfPlns( _simplices.size() );
5896 for ( size_t i = 0; i < _simplices.size(); ++i )
5898 gp_XYZ OP1 = SMESH_TNodeXYZ( _simplices[i]._nPrev ) - center;
5899 gp_XYZ OP2 = SMESH_TNodeXYZ( _simplices[i]._nNext ) - center;
5900 gp_XY p1( OP1 * xAxis, OP1 * yAxis );
5901 gp_XY p2( OP2 * xAxis, OP2 * yAxis );
5902 gp_XY vec12 = p2 - p1;
5903 double dist12 = vec12.Modulus();
5907 halfPlns[ nbHP ]._pos = p1;
5908 halfPlns[ nbHP ]._dir = vec12;
5909 halfPlns[ nbHP ]._inNorm.SetCoord( -vec12.Y(), vec12.X() );
5913 // intersect boundaries of half-planes, define state of intersection points
5914 // in relation to all half-planes and calculate internal point of a 2D polygon
5917 gp_XY newPos2D (0,0);
5919 enum { UNDEF = -1, NOT_OUT, IS_OUT, NO_INT };
5920 typedef std::pair< gp_XY, int > TIntPntState; // coord and isOut state
5921 TIntPntState undefIPS( gp_XY(1e100,1e100), UNDEF );
5923 vector< vector< TIntPntState > > allIntPnts( nbHP );
5924 for ( int iHP1 = 0; iHP1 < nbHP; ++iHP1 )
5926 vector< TIntPntState > & intPnts1 = allIntPnts[ iHP1 ];
5927 if ( intPnts1.empty() ) intPnts1.resize( nbHP, undefIPS );
5929 int iPrev = SMESH_MesherHelper::WrapIndex( iHP1 - 1, nbHP );
5930 int iNext = SMESH_MesherHelper::WrapIndex( iHP1 + 1, nbHP );
5933 const gp_XY* segEnds[2] = { 0, 0 }; // NOT_OUT points
5935 for ( int iHP2 = 0; iHP2 < nbHP; ++iHP2 )
5937 if ( iHP1 == iHP2 ) continue;
5939 TIntPntState & ips1 = intPnts1[ iHP2 ];
5940 if ( ips1.second == UNDEF )
5942 // find an intersection point of boundaries of iHP1 and iHP2
5944 if ( iHP2 == iPrev ) // intersection with neighbors is known
5945 ips1.first = halfPlns[ iHP1 ]._pos;
5946 else if ( iHP2 == iNext )
5947 ips1.first = halfPlns[ iHP2 ]._pos;
5948 else if ( !halfPlns[ iHP1 ].FindInterestion( halfPlns[ iHP2 ], ips1.first ))
5949 ips1.second = NO_INT;
5951 // classify the found intersection point
5952 if ( ips1.second != NO_INT )
5954 ips1.second = NOT_OUT;
5955 for ( int i = 0; i < nbHP && ips1.second == NOT_OUT; ++i )
5956 if ( i != iHP1 && i != iHP2 &&
5957 halfPlns[ i ].IsOut( ips1.first, tol ))
5958 ips1.second = IS_OUT;
5960 vector< TIntPntState > & intPnts2 = allIntPnts[ iHP2 ];
5961 if ( intPnts2.empty() ) intPnts2.resize( nbHP, undefIPS );
5962 TIntPntState & ips2 = intPnts2[ iHP1 ];
5965 if ( ips1.second == NOT_OUT )
5968 segEnds[ bool(segEnds[0]) ] = & ips1.first;
5972 // find a NOT_OUT segment of boundary which is located between
5973 // two NOT_OUT int points
5976 continue; // no such a segment
5980 // sort points along the boundary
5981 map< double, TIntPntState* > ipsByParam;
5982 for ( int iHP2 = 0; iHP2 < nbHP; ++iHP2 )
5984 TIntPntState & ips1 = intPnts1[ iHP2 ];
5985 if ( ips1.second != NO_INT )
5987 gp_XY op = ips1.first - halfPlns[ iHP1 ]._pos;
5988 double param = op * halfPlns[ iHP1 ]._dir;
5989 ipsByParam.insert( make_pair( param, & ips1 ));
5992 // look for two neighboring NOT_OUT points
5994 map< double, TIntPntState* >::iterator u2ips = ipsByParam.begin();
5995 for ( ; u2ips != ipsByParam.end(); ++u2ips )
5997 TIntPntState & ips1 = *(u2ips->second);
5998 if ( ips1.second == NOT_OUT )
5999 segEnds[ bool( nbNotOut++ ) ] = & ips1.first;
6000 else if ( nbNotOut >= 2 )
6007 if ( nbNotOut >= 2 )
6009 double len = ( *segEnds[0] - *segEnds[1] ).Modulus();
6012 newPos2D += 0.5 * len * ( *segEnds[0] + *segEnds[1] );
6019 newPos = center + xAxis * newPos2D.X() + yAxis * newPos2D.Y();
6029 //================================================================================
6031 * \brief Add a new segment to _LayerEdge during inflation
6033 //================================================================================
6035 void _LayerEdge::SetNewLength( double len, _EdgesOnShape& eos, SMESH_MesherHelper& helper )
6037 if ( _len - len > -1e-6 )
6039 //_pos.push_back( _pos.back() );
6043 SMDS_MeshNode* n = const_cast< SMDS_MeshNode*>( _nodes.back() );
6044 gp_XYZ oldXYZ = SMESH_TNodeXYZ( n );
6046 if ( eos._hyp.IsOffsetMethod() )
6050 SMDS_ElemIteratorPtr faceIt = _nodes[0]->GetInverseElementIterator( SMDSAbs_Face );
6051 while ( faceIt->more() )
6053 const SMDS_MeshElement* face = faceIt->next();
6054 if ( !eos.GetNormal( face, faceNorm ))
6057 // translate plane of a face
6058 gp_XYZ baryCenter = oldXYZ + faceNorm.XYZ() * ( len - _len );
6060 // find point of intersection of the face plane located at baryCenter
6061 // and _normal located at newXYZ
6062 double d = -( faceNorm.XYZ() * baryCenter ); // d of plane equation ax+by+cz+d=0
6063 double dot = ( faceNorm.XYZ() * _normal );
6064 if ( dot < std::numeric_limits<double>::min() )
6065 dot = ( len - _len ) * 1e-3;
6066 double step = -( faceNorm.XYZ() * newXYZ + d ) / dot;
6067 newXYZ += step * _normal;
6072 newXYZ = oldXYZ + _normal * ( len - _len ) * _lenFactor;
6074 n->setXYZ( newXYZ.X(), newXYZ.Y(), newXYZ.Z() );
6076 _pos.push_back( newXYZ );
6079 if ( !eos._sWOL.IsNull() )
6082 if ( eos.SWOLType() == TopAbs_EDGE )
6084 double u = Precision::Infinite(); // to force projection w/o distance check
6085 helper.CheckNodeU( TopoDS::Edge( eos._sWOL ), n, u, 1e-10, /*force=*/true, distXYZ );
6086 _pos.back().SetCoord( u, 0, 0 );
6087 if ( _nodes.size() > 1 )
6089 SMDS_EdgePosition* pos = static_cast<SMDS_EdgePosition*>( n->GetPosition() );
6090 pos->SetUParameter( u );
6095 gp_XY uv( Precision::Infinite(), 0 );
6096 helper.CheckNodeUV( TopoDS::Face( eos._sWOL ), n, uv, 1e-10, /*force=*/true, distXYZ );
6097 _pos.back().SetCoord( uv.X(), uv.Y(), 0 );
6098 if ( _nodes.size() > 1 )
6100 SMDS_FacePosition* pos = static_cast<SMDS_FacePosition*>( n->GetPosition() );
6101 pos->SetUParameter( uv.X() );
6102 pos->SetVParameter( uv.Y() );
6105 n->setXYZ( distXYZ[1], distXYZ[2], distXYZ[3]);
6107 dumpMove( n ); //debug
6110 //================================================================================
6112 * \brief Remove last inflation step
6114 //================================================================================
6116 void _LayerEdge::InvalidateStep( int curStep, const _EdgesOnShape& eos, bool restoreLength )
6118 if ( _pos.size() > curStep )
6120 if ( restoreLength )
6121 _len -= ( _pos[ curStep-1 ] - _pos.back() ).Modulus();
6123 _pos.resize( curStep );
6124 gp_Pnt nXYZ = _pos.back();
6125 SMDS_MeshNode* n = const_cast< SMDS_MeshNode*>( _nodes.back() );
6126 if ( !eos._sWOL.IsNull() )
6128 TopLoc_Location loc;
6129 if ( eos.SWOLType() == TopAbs_EDGE )
6131 SMDS_EdgePosition* pos = static_cast<SMDS_EdgePosition*>( n->GetPosition() );
6132 pos->SetUParameter( nXYZ.X() );
6134 Handle(Geom_Curve) curve = BRep_Tool::Curve( TopoDS::Edge( eos._sWOL ), loc, f,l);
6135 nXYZ = curve->Value( nXYZ.X() ).Transformed( loc );
6139 SMDS_FacePosition* pos = static_cast<SMDS_FacePosition*>( n->GetPosition() );
6140 pos->SetUParameter( nXYZ.X() );
6141 pos->SetVParameter( nXYZ.Y() );
6142 Handle(Geom_Surface) surface = BRep_Tool::Surface( TopoDS::Face(eos._sWOL), loc );
6143 nXYZ = surface->Value( nXYZ.X(), nXYZ.Y() ).Transformed( loc );
6146 n->setXYZ( nXYZ.X(), nXYZ.Y(), nXYZ.Z() );
6151 //================================================================================
6153 * \brief Create layers of prisms
6155 //================================================================================
6157 bool _ViscousBuilder::refine(_SolidData& data)
6159 SMESH_MesherHelper helper( *_mesh );
6160 helper.SetSubShape( data._solid );
6161 helper.SetElementsOnShape(false);
6163 Handle(Geom_Curve) curve;
6164 Handle(Geom_Surface) surface;
6165 TopoDS_Edge geomEdge;
6166 TopoDS_Face geomFace;
6167 TopoDS_Shape prevSWOL;
6168 TopLoc_Location loc;
6172 TGeomID prevBaseId = -1;
6173 TNode2Edge* n2eMap = 0;
6174 TNode2Edge::iterator n2e;
6176 // Create intermediate nodes on each _LayerEdge
6178 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
6180 _EdgesOnShape& eos = data._edgesOnShape[iS];
6181 if ( eos._edges.empty() ) continue;
6183 if ( eos._edges[0]->_nodes.size() < 2 )
6184 continue; // on _noShrinkShapes
6186 for ( size_t i = 0; i < eos._edges.size(); ++i )
6188 _LayerEdge& edge = *eos._edges[i];
6190 // get accumulated length of segments
6191 vector< double > segLen( edge._pos.size() );
6193 for ( size_t j = 1; j < edge._pos.size(); ++j )
6194 segLen[j] = segLen[j-1] + (edge._pos[j-1] - edge._pos[j] ).Modulus();
6196 // allocate memory for new nodes if it is not yet refined
6197 const SMDS_MeshNode* tgtNode = edge._nodes.back();
6198 if ( edge._nodes.size() == 2 )
6200 edge._nodes.resize( eos._hyp.GetNumberLayers() + 1, 0 );
6202 edge._nodes.back() = tgtNode;
6204 // get data of a shrink shape
6205 if ( !eos._sWOL.IsNull() && eos._sWOL != prevSWOL )
6207 isOnEdge = ( eos.SWOLType() == TopAbs_EDGE );
6210 geomEdge = TopoDS::Edge( eos._sWOL );
6211 curve = BRep_Tool::Curve( geomEdge, loc, f,l);
6215 geomFace = TopoDS::Face( eos._sWOL );
6216 surface = BRep_Tool::Surface( geomFace, loc );
6218 prevSWOL = eos._sWOL;
6220 // restore shapePos of the last node by already treated _LayerEdge of another _SolidData
6221 const TGeomID baseShapeId = edge._nodes[0]->getshapeId();
6222 if ( baseShapeId != prevBaseId )
6224 map< TGeomID, TNode2Edge* >::iterator s2ne = data._s2neMap.find( baseShapeId );
6225 n2eMap = ( s2ne == data._s2neMap.end() ) ? 0 : n2eMap = s2ne->second;
6226 prevBaseId = baseShapeId;
6228 _LayerEdge* edgeOnSameNode = 0;
6229 if ( n2eMap && (( n2e = n2eMap->find( edge._nodes[0] )) != n2eMap->end() ))
6231 edgeOnSameNode = n2e->second;
6232 const gp_XYZ& otherTgtPos = edgeOnSameNode->_pos.back();
6233 SMDS_PositionPtr lastPos = tgtNode->GetPosition();
6236 SMDS_EdgePosition* epos = static_cast<SMDS_EdgePosition*>( lastPos );
6237 epos->SetUParameter( otherTgtPos.X() );
6241 SMDS_FacePosition* fpos = static_cast<SMDS_FacePosition*>( lastPos );
6242 fpos->SetUParameter( otherTgtPos.X() );
6243 fpos->SetVParameter( otherTgtPos.Y() );
6246 // calculate height of the first layer
6248 const double T = segLen.back(); //data._hyp.GetTotalThickness();
6249 const double f = eos._hyp.GetStretchFactor();
6250 const int N = eos._hyp.GetNumberLayers();
6251 const double fPowN = pow( f, N );
6252 if ( fPowN - 1 <= numeric_limits<double>::min() )
6255 h0 = T * ( f - 1 )/( fPowN - 1 );
6257 const double zeroLen = std::numeric_limits<double>::min();
6259 // create intermediate nodes
6260 double hSum = 0, hi = h0/f;
6262 for ( size_t iStep = 1; iStep < edge._nodes.size(); ++iStep )
6264 // compute an intermediate position
6267 while ( hSum > segLen[iSeg] && iSeg < segLen.size()-1)
6269 int iPrevSeg = iSeg-1;
6270 while ( fabs( segLen[iPrevSeg] - segLen[iSeg]) <= zeroLen && iPrevSeg > 0 )
6272 double r = ( segLen[iSeg] - hSum ) / ( segLen[iSeg] - segLen[iPrevSeg] );
6273 gp_Pnt pos = r * edge._pos[iPrevSeg] + (1-r) * edge._pos[iSeg];
6275 SMDS_MeshNode*& node = const_cast< SMDS_MeshNode*& >( edge._nodes[ iStep ]);
6276 if ( !eos._sWOL.IsNull() )
6278 // compute XYZ by parameters <pos>
6283 pos = curve->Value( u ).Transformed(loc);
6287 uv.SetCoord( pos.X(), pos.Y() );
6289 pos = surface->Value( pos.X(), pos.Y() ).Transformed(loc);
6292 // create or update the node
6295 node = helper.AddNode( pos.X(), pos.Y(), pos.Z());
6296 if ( !eos._sWOL.IsNull() )
6299 getMeshDS()->SetNodeOnEdge( node, geomEdge, u );
6301 getMeshDS()->SetNodeOnFace( node, geomFace, uv.X(), uv.Y() );
6305 getMeshDS()->SetNodeInVolume( node, helper.GetSubShapeID() );
6310 if ( !eos._sWOL.IsNull() )
6312 // make average pos from new and current parameters
6315 u = 0.5 * ( u + helper.GetNodeU( geomEdge, node ));
6316 pos = curve->Value( u ).Transformed(loc);
6318 SMDS_EdgePosition* epos = static_cast<SMDS_EdgePosition*>( node->GetPosition() );
6319 epos->SetUParameter( u );
6323 uv = 0.5 * ( uv + helper.GetNodeUV( geomFace, node ));
6324 pos = surface->Value( uv.X(), uv.Y()).Transformed(loc);
6326 SMDS_FacePosition* fpos = static_cast<SMDS_FacePosition*>( node->GetPosition() );
6327 fpos->SetUParameter( uv.X() );
6328 fpos->SetVParameter( uv.Y() );
6331 node->setXYZ( pos.X(), pos.Y(), pos.Z() );
6333 } // loop on edge._nodes
6335 if ( !eos._sWOL.IsNull() ) // prepare for shrink()
6338 edge._pos.back().SetCoord( u, 0,0);
6340 edge._pos.back().SetCoord( uv.X(), uv.Y() ,0);
6342 if ( edgeOnSameNode )
6343 edgeOnSameNode->_pos.back() = edge._pos.back();
6346 } // loop on eos._edges to create nodes
6349 if ( !getMeshDS()->IsEmbeddedMode() )
6350 // Log node movement
6351 for ( size_t i = 0; i < eos._edges.size(); ++i )
6353 SMESH_TNodeXYZ p ( eos._edges[i]->_nodes.back() );
6354 getMeshDS()->MoveNode( p._node, p.X(), p.Y(), p.Z() );
6361 helper.SetElementsOnShape(true);
6363 vector< vector<const SMDS_MeshNode*>* > nnVec;
6364 set< vector<const SMDS_MeshNode*>* > nnSet;
6365 set< int > degenEdgeInd;
6366 vector<const SMDS_MeshElement*> degenVols;
6368 TopExp_Explorer exp( data._solid, TopAbs_FACE );
6369 for ( ; exp.More(); exp.Next() )
6371 const TGeomID faceID = getMeshDS()->ShapeToIndex( exp.Current() );
6372 if ( data._ignoreFaceIds.count( faceID ))
6374 const bool isReversedFace = data._reversedFaceIds.count( faceID );
6375 SMESHDS_SubMesh* fSubM = getMeshDS()->MeshElements( exp.Current() );
6376 SMDS_ElemIteratorPtr fIt = fSubM->GetElements();
6377 while ( fIt->more() )
6379 const SMDS_MeshElement* face = fIt->next();
6380 const int nbNodes = face->NbCornerNodes();
6381 nnVec.resize( nbNodes );
6383 degenEdgeInd.clear();
6385 SMDS_NodeIteratorPtr nIt = face->nodeIterator();
6386 for ( int iN = 0; iN < nbNodes; ++iN )
6388 const SMDS_MeshNode* n = nIt->next();
6389 const int i = isReversedFace ? nbNodes-1-iN : iN;
6390 nnVec[ i ] = & data._n2eMap[ n ]->_nodes;
6391 if ( nnVec[ i ]->size() < 2 )
6392 degenEdgeInd.insert( iN );
6394 nbZ = nnVec[ i ]->size();
6396 if ( helper.HasDegeneratedEdges() )
6397 nnSet.insert( nnVec[ i ]);
6401 if ( 0 < nnSet.size() && nnSet.size() < 3 )
6407 switch ( degenEdgeInd.size() )
6411 for ( int iZ = 1; iZ < nbZ; ++iZ )
6412 helper.AddVolume( (*nnVec[0])[iZ-1], (*nnVec[1])[iZ-1], (*nnVec[2])[iZ-1],
6413 (*nnVec[0])[iZ], (*nnVec[1])[iZ], (*nnVec[2])[iZ]);
6418 int i2 = *degenEdgeInd.begin();
6419 int i0 = helper.WrapIndex( i2 - 1, nbNodes );
6420 int i1 = helper.WrapIndex( i2 + 1, nbNodes );
6421 for ( int iZ = 1; iZ < nbZ; ++iZ )
6422 helper.AddVolume( (*nnVec[i0])[iZ-1], (*nnVec[i1])[iZ-1],
6423 (*nnVec[i1])[iZ], (*nnVec[i0])[iZ], (*nnVec[i2])[0]);
6428 int i3 = !degenEdgeInd.count(0) ? 0 : !degenEdgeInd.count(1) ? 1 : 2;
6429 for ( int iZ = 1; iZ < nbZ; ++iZ )
6430 helper.AddVolume( (*nnVec[0])[iZ-1], (*nnVec[1])[iZ-1], (*nnVec[2])[iZ-1],
6438 switch ( degenEdgeInd.size() )
6442 for ( int iZ = 1; iZ < nbZ; ++iZ )
6443 helper.AddVolume( (*nnVec[0])[iZ-1], (*nnVec[1])[iZ-1],
6444 (*nnVec[2])[iZ-1], (*nnVec[3])[iZ-1],
6445 (*nnVec[0])[iZ], (*nnVec[1])[iZ],
6446 (*nnVec[2])[iZ], (*nnVec[3])[iZ]);
6451 int i2 = *degenEdgeInd.begin();
6452 int i3 = *degenEdgeInd.rbegin();
6453 bool ok = ( i3 - i2 == 1 );
6454 if ( i2 == 0 && i3 == 3 ) { i2 = 3; i3 = 0; ok = true; }
6455 int i0 = helper.WrapIndex( i3 + 1, nbNodes );
6456 int i1 = helper.WrapIndex( i0 + 1, nbNodes );
6457 for ( int iZ = 1; iZ < nbZ; ++iZ )
6459 const SMDS_MeshElement* vol =
6460 helper.AddVolume( (*nnVec[i3])[0], (*nnVec[i0])[iZ], (*nnVec[i0])[iZ-1],
6461 (*nnVec[i2])[0], (*nnVec[i1])[iZ], (*nnVec[i1])[iZ-1]);
6463 degenVols.push_back( vol );
6467 case 3: // degen HEX
6469 const SMDS_MeshNode* nn[8];
6470 for ( int iZ = 1; iZ < nbZ; ++iZ )
6472 const SMDS_MeshElement* vol =
6473 helper.AddVolume( nnVec[0]->size() > 1 ? (*nnVec[0])[iZ-1] : (*nnVec[0])[0],
6474 nnVec[1]->size() > 1 ? (*nnVec[1])[iZ-1] : (*nnVec[1])[0],
6475 nnVec[2]->size() > 1 ? (*nnVec[2])[iZ-1] : (*nnVec[2])[0],
6476 nnVec[3]->size() > 1 ? (*nnVec[3])[iZ-1] : (*nnVec[3])[0],
6477 nnVec[0]->size() > 1 ? (*nnVec[0])[iZ] : (*nnVec[0])[0],
6478 nnVec[1]->size() > 1 ? (*nnVec[1])[iZ] : (*nnVec[1])[0],
6479 nnVec[2]->size() > 1 ? (*nnVec[2])[iZ] : (*nnVec[2])[0],
6480 nnVec[3]->size() > 1 ? (*nnVec[3])[iZ] : (*nnVec[3])[0]);
6481 degenVols.push_back( vol );
6489 return error("Not supported type of element", data._index);
6491 } // switch ( nbNodes )
6492 } // while ( fIt->more() )
6495 if ( !degenVols.empty() )
6497 SMESH_ComputeErrorPtr& err = _mesh->GetSubMesh( data._solid )->GetComputeError();
6498 if ( !err || err->IsOK() )
6500 err.reset( new SMESH_ComputeError( COMPERR_WARNING,
6501 "Degenerated volumes created" ));
6502 err->myBadElements.insert( err->myBadElements.end(),
6503 degenVols.begin(),degenVols.end() );
6510 //================================================================================
6512 * \brief Shrink 2D mesh on faces to let space for inflated layers
6514 //================================================================================
6516 bool _ViscousBuilder::shrink()
6518 // make map of (ids of FACEs to shrink mesh on) to (_SolidData containing _LayerEdge's
6519 // inflated along FACE or EDGE)
6520 map< TGeomID, _SolidData* > f2sdMap;
6521 for ( size_t i = 0 ; i < _sdVec.size(); ++i )
6523 _SolidData& data = _sdVec[i];
6524 TopTools_MapOfShape FFMap;
6525 map< TGeomID, TopoDS_Shape >::iterator s2s = data._shrinkShape2Shape.begin();
6526 for (; s2s != data._shrinkShape2Shape.end(); ++s2s )
6527 if ( s2s->second.ShapeType() == TopAbs_FACE )
6529 f2sdMap.insert( make_pair( getMeshDS()->ShapeToIndex( s2s->second ), &data ));
6531 if ( FFMap.Add( (*s2s).second ))
6532 // Put mesh faces on the shrinked FACE to the proxy sub-mesh to avoid
6533 // usage of mesh faces made in addBoundaryElements() by the 3D algo or
6534 // by StdMeshers_QuadToTriaAdaptor
6535 if ( SMESHDS_SubMesh* smDS = getMeshDS()->MeshElements( s2s->second ))
6537 SMESH_ProxyMesh::SubMesh* proxySub =
6538 data._proxyMesh->getFaceSubM( TopoDS::Face( s2s->second ), /*create=*/true);
6539 SMDS_ElemIteratorPtr fIt = smDS->GetElements();
6540 while ( fIt->more() )
6541 proxySub->AddElement( fIt->next() );
6542 // as a result 3D algo will use elements from proxySub and not from smDS
6547 SMESH_MesherHelper helper( *_mesh );
6548 helper.ToFixNodeParameters( true );
6551 map< TGeomID, _Shrinker1D > e2shrMap;
6552 vector< _EdgesOnShape* > subEOS;
6553 vector< _LayerEdge* > lEdges;
6555 // loop on FACES to srink mesh on
6556 map< TGeomID, _SolidData* >::iterator f2sd = f2sdMap.begin();
6557 for ( ; f2sd != f2sdMap.end(); ++f2sd )
6559 _SolidData& data = *f2sd->second;
6560 const TopoDS_Face& F = TopoDS::Face( getMeshDS()->IndexToShape( f2sd->first ));
6561 SMESH_subMesh* sm = _mesh->GetSubMesh( F );
6562 SMESHDS_SubMesh* smDS = sm->GetSubMeshDS();
6564 Handle(Geom_Surface) surface = BRep_Tool::Surface(F);
6566 helper.SetSubShape(F);
6568 // ===========================
6569 // Prepare data for shrinking
6570 // ===========================
6572 // Collect nodes to smooth, as src nodes are not yet replaced by tgt ones
6573 // and thus all nodes on a FACE connected to 2d elements are to be smoothed
6574 vector < const SMDS_MeshNode* > smoothNodes;
6576 SMDS_NodeIteratorPtr nIt = smDS->GetNodes();
6577 while ( nIt->more() )
6579 const SMDS_MeshNode* n = nIt->next();
6580 if ( n->NbInverseElements( SMDSAbs_Face ) > 0 )
6581 smoothNodes.push_back( n );
6584 // Find out face orientation
6586 const set<TGeomID> ignoreShapes;
6588 if ( !smoothNodes.empty() )
6590 vector<_Simplex> simplices;
6591 _Simplex::GetSimplices( smoothNodes[0], simplices, ignoreShapes );
6592 helper.GetNodeUV( F, simplices[0]._nPrev, 0, &isOkUV ); // fix UV of silpmex nodes
6593 helper.GetNodeUV( F, simplices[0]._nNext, 0, &isOkUV );
6594 gp_XY uv = helper.GetNodeUV( F, smoothNodes[0], 0, &isOkUV );
6595 if ( !simplices[0].IsForward(uv, smoothNodes[0], F, helper,refSign) )
6599 // Find _LayerEdge's inflated along F
6603 SMESH_subMeshIteratorPtr subIt = sm->getDependsOnIterator(/*includeSelf=*/false);
6604 while ( subIt->more() )
6606 const TGeomID subID = subIt->next()->GetId();
6607 if ( data._noShrinkShapes.count( subID ))
6609 _EdgesOnShape* eos = data.GetShapeEdges( subID );
6610 if ( !eos || eos->_sWOL.IsNull() ) continue;
6612 subEOS.push_back( eos );
6614 for ( size_t i = 0; i < eos->_edges.size(); ++i )
6616 lEdges.push_back( eos->_edges[ i ] );
6617 prepareEdgeToShrink( *eos->_edges[ i ], *eos, helper, smDS );
6622 dumpFunction(SMESH_Comment("beforeShrinkFace")<<f2sd->first); // debug
6623 SMDS_ElemIteratorPtr fIt = smDS->GetElements();
6624 while ( fIt->more() )
6625 if ( const SMDS_MeshElement* f = fIt->next() )
6626 dumpChangeNodes( f );
6629 // Replace source nodes by target nodes in mesh faces to shrink
6630 dumpFunction(SMESH_Comment("replNodesOnFace")<<f2sd->first); // debug
6631 const SMDS_MeshNode* nodes[20];
6632 for ( size_t iS = 0; iS < subEOS.size(); ++iS )
6634 _EdgesOnShape& eos = * subEOS[ iS ];
6635 for ( size_t i = 0; i < eos._edges.size(); ++i )
6637 _LayerEdge& edge = *eos._edges[i];
6638 const SMDS_MeshNode* srcNode = edge._nodes[0];
6639 const SMDS_MeshNode* tgtNode = edge._nodes.back();
6640 SMDS_ElemIteratorPtr fIt = srcNode->GetInverseElementIterator(SMDSAbs_Face);
6641 while ( fIt->more() )
6643 const SMDS_MeshElement* f = fIt->next();
6644 if ( !smDS->Contains( f ))
6646 SMDS_NodeIteratorPtr nIt = f->nodeIterator();
6647 for ( int iN = 0; nIt->more(); ++iN )
6649 const SMDS_MeshNode* n = nIt->next();
6650 nodes[iN] = ( n == srcNode ? tgtNode : n );
6652 helper.GetMeshDS()->ChangeElementNodes( f, nodes, f->NbNodes() );
6653 dumpChangeNodes( f );
6659 // find out if a FACE is concave
6660 const bool isConcaveFace = isConcave( F, helper );
6662 // Create _SmoothNode's on face F
6663 vector< _SmoothNode > nodesToSmooth( smoothNodes.size() );
6665 dumpFunction(SMESH_Comment("fixUVOnFace")<<f2sd->first); // debug
6666 const bool sortSimplices = isConcaveFace;
6667 for ( size_t i = 0; i < smoothNodes.size(); ++i )
6669 const SMDS_MeshNode* n = smoothNodes[i];
6670 nodesToSmooth[ i ]._node = n;
6671 // src nodes must be replaced by tgt nodes to have tgt nodes in _simplices
6672 _Simplex::GetSimplices( n, nodesToSmooth[ i ]._simplices, ignoreShapes, 0, sortSimplices);
6673 // fix up incorrect uv of nodes on the FACE
6674 helper.GetNodeUV( F, n, 0, &isOkUV);
6679 //if ( nodesToSmooth.empty() ) continue;
6681 // Find EDGE's to shrink and set simpices to LayerEdge's
6682 set< _Shrinker1D* > eShri1D;
6684 for ( size_t iS = 0; iS < subEOS.size(); ++iS )
6686 _EdgesOnShape& eos = * subEOS[ iS ];
6687 if ( eos.SWOLType() == TopAbs_EDGE )
6689 SMESH_subMesh* edgeSM = _mesh->GetSubMesh( eos._sWOL );
6690 _Shrinker1D& srinker = e2shrMap[ edgeSM->GetId() ];
6691 eShri1D.insert( & srinker );
6692 srinker.AddEdge( eos._edges[0], eos, helper );
6693 VISCOUS_3D::ToClearSubWithMain( edgeSM, data._solid );
6694 // restore params of nodes on EGDE if the EDGE has been already
6695 // srinked while srinking other FACE
6696 srinker.RestoreParams();
6698 for ( size_t i = 0; i < eos._edges.size(); ++i )
6700 _LayerEdge& edge = * eos._edges[i];
6701 _Simplex::GetSimplices( /*tgtNode=*/edge._nodes.back(), edge._simplices, ignoreShapes );
6706 bool toFixTria = false; // to improve quality of trias by diagonal swap
6707 if ( isConcaveFace )
6709 const bool hasTria = _mesh->NbTriangles(), hasQuad = _mesh->NbQuadrangles();
6710 if ( hasTria != hasQuad ) {
6711 toFixTria = hasTria;
6714 set<int> nbNodesSet;
6715 SMDS_ElemIteratorPtr fIt = smDS->GetElements();
6716 while ( fIt->more() && nbNodesSet.size() < 2 )
6717 nbNodesSet.insert( fIt->next()->NbCornerNodes() );
6718 toFixTria = ( *nbNodesSet.begin() == 3 );
6722 // ==================
6723 // Perform shrinking
6724 // ==================
6726 bool shrinked = true;
6727 int badNb, shriStep=0, smooStep=0;
6728 _SmoothNode::SmoothType smoothType
6729 = isConcaveFace ? _SmoothNode::ANGULAR : _SmoothNode::LAPLACIAN;
6733 // Move boundary nodes (actually just set new UV)
6734 // -----------------------------------------------
6735 dumpFunction(SMESH_Comment("moveBoundaryOnF")<<f2sd->first<<"_st"<<shriStep ); // debug
6737 for ( size_t iS = 0; iS < subEOS.size(); ++iS )
6739 _EdgesOnShape& eos = * subEOS[ iS ];
6740 for ( size_t i = 0; i < eos._edges.size(); ++i )
6742 shrinked |= eos._edges[i]->SetNewLength2d( surface, F, eos, helper );
6747 // Move nodes on EDGE's
6748 // (XYZ is set as soon as a needed length reached in SetNewLength2d())
6749 set< _Shrinker1D* >::iterator shr = eShri1D.begin();
6750 for ( ; shr != eShri1D.end(); ++shr )
6751 (*shr)->Compute( /*set3D=*/false, helper );
6754 // -----------------
6755 int nbNoImpSteps = 0;
6758 while (( nbNoImpSteps < 5 && badNb > 0) && moved)
6760 dumpFunction(SMESH_Comment("shrinkFace")<<f2sd->first<<"_st"<<++smooStep); // debug
6762 int oldBadNb = badNb;
6765 for ( size_t i = 0; i < nodesToSmooth.size(); ++i )
6767 moved |= nodesToSmooth[i].Smooth( badNb, surface, helper, refSign,
6768 smoothType, /*set3D=*/isConcaveFace);
6770 if ( badNb < oldBadNb )
6778 return error(SMESH_Comment("Can't shrink 2D mesh on face ") << f2sd->first );
6779 if ( shriStep > 200 )
6780 return error(SMESH_Comment("Infinite loop at shrinking 2D mesh on face ") << f2sd->first );
6782 // Fix narrow triangles by swapping diagonals
6783 // ---------------------------------------
6786 set<const SMDS_MeshNode*> usedNodes;
6787 fixBadFaces( F, helper, /*is2D=*/true, shriStep, & usedNodes); // swap diagonals
6789 // update working data
6790 set<const SMDS_MeshNode*>::iterator n;
6791 for ( size_t i = 0; i < nodesToSmooth.size() && !usedNodes.empty(); ++i )
6793 n = usedNodes.find( nodesToSmooth[ i ]._node );
6794 if ( n != usedNodes.end())
6796 _Simplex::GetSimplices( nodesToSmooth[ i ]._node,
6797 nodesToSmooth[ i ]._simplices,
6799 /*sortSimplices=*/ smoothType == _SmoothNode::ANGULAR );
6800 usedNodes.erase( n );
6803 for ( size_t i = 0; i < lEdges.size() && !usedNodes.empty(); ++i )
6805 n = usedNodes.find( /*tgtNode=*/ lEdges[i]->_nodes.back() );
6806 if ( n != usedNodes.end())
6808 _Simplex::GetSimplices( lEdges[i]->_nodes.back(),
6809 lEdges[i]->_simplices,
6811 usedNodes.erase( n );
6815 // TODO: check effect of this additional smooth
6816 // additional laplacian smooth to increase allowed shrink step
6817 // for ( int st = 1; st; --st )
6819 // dumpFunction(SMESH_Comment("shrinkFace")<<f2sd->first<<"_st"<<++smooStep); // debug
6820 // for ( size_t i = 0; i < nodesToSmooth.size(); ++i )
6822 // nodesToSmooth[i].Smooth( badNb,surface,helper,refSign,
6823 // _SmoothNode::LAPLACIAN,/*set3D=*/false);
6826 } // while ( shrinked )
6828 // No wrongly shaped faces remain; final smooth. Set node XYZ.
6829 bool isStructuredFixed = false;
6830 if ( SMESH_2D_Algo* algo = dynamic_cast<SMESH_2D_Algo*>( sm->GetAlgo() ))
6831 isStructuredFixed = algo->FixInternalNodes( *data._proxyMesh, F );
6832 if ( !isStructuredFixed )
6834 if ( isConcaveFace ) // fix narrow faces by swapping diagonals
6835 fixBadFaces( F, helper, /*is2D=*/false, ++shriStep );
6837 for ( int st = 3; st; --st )
6840 case 1: smoothType = _SmoothNode::LAPLACIAN; break;
6841 case 2: smoothType = _SmoothNode::LAPLACIAN; break;
6842 case 3: smoothType = _SmoothNode::ANGULAR; break;
6844 dumpFunction(SMESH_Comment("shrinkFace")<<f2sd->first<<"_st"<<++smooStep); // debug
6845 for ( size_t i = 0; i < nodesToSmooth.size(); ++i )
6847 nodesToSmooth[i].Smooth( badNb,surface,helper,refSign,
6848 smoothType,/*set3D=*/st==1 );
6853 // Set an event listener to clear FACE sub-mesh together with SOLID sub-mesh
6854 VISCOUS_3D::ToClearSubWithMain( sm, data._solid );
6856 if ( !getMeshDS()->IsEmbeddedMode() )
6857 // Log node movement
6858 for ( size_t i = 0; i < nodesToSmooth.size(); ++i )
6860 SMESH_TNodeXYZ p ( nodesToSmooth[i]._node );
6861 getMeshDS()->MoveNode( nodesToSmooth[i]._node, p.X(), p.Y(), p.Z() );
6864 } // loop on FACES to srink mesh on
6867 // Replace source nodes by target nodes in shrinked mesh edges
6869 map< int, _Shrinker1D >::iterator e2shr = e2shrMap.begin();
6870 for ( ; e2shr != e2shrMap.end(); ++e2shr )
6871 e2shr->second.SwapSrcTgtNodes( getMeshDS() );
6876 //================================================================================
6878 * \brief Computes 2d shrink direction and finds nodes limiting shrinking
6880 //================================================================================
6882 bool _ViscousBuilder::prepareEdgeToShrink( _LayerEdge& edge,
6884 SMESH_MesherHelper& helper,
6885 const SMESHDS_SubMesh* faceSubMesh)
6887 const SMDS_MeshNode* srcNode = edge._nodes[0];
6888 const SMDS_MeshNode* tgtNode = edge._nodes.back();
6890 if ( eos.SWOLType() == TopAbs_FACE )
6892 gp_XY srcUV ( edge._pos[0].X(), edge._pos[0].Y() ); //helper.GetNodeUV( F, srcNode );
6893 gp_XY tgtUV = edge.LastUV( TopoDS::Face( eos._sWOL ), eos ); //helper.GetNodeUV( F, tgtNode );
6894 gp_Vec2d uvDir( srcUV, tgtUV );
6895 double uvLen = uvDir.Magnitude();
6897 edge._normal.SetCoord( uvDir.X(),uvDir.Y(), 0 );
6900 edge._pos.resize(1);
6901 edge._pos[0].SetCoord( tgtUV.X(), tgtUV.Y(), 0 );
6903 // set UV of source node to target node
6904 SMDS_FacePosition* pos = static_cast<SMDS_FacePosition*>( tgtNode->GetPosition() );
6905 pos->SetUParameter( srcUV.X() );
6906 pos->SetVParameter( srcUV.Y() );
6908 else // _sWOL is TopAbs_EDGE
6910 const TopoDS_Edge& E = TopoDS::Edge( eos._sWOL );
6911 SMESHDS_SubMesh* edgeSM = getMeshDS()->MeshElements( E );
6912 if ( !edgeSM || edgeSM->NbElements() == 0 )
6913 return error(SMESH_Comment("Not meshed EDGE ") << getMeshDS()->ShapeToIndex( E ));
6915 const SMDS_MeshNode* n2 = 0;
6916 SMDS_ElemIteratorPtr eIt = srcNode->GetInverseElementIterator(SMDSAbs_Edge);
6917 while ( eIt->more() && !n2 )
6919 const SMDS_MeshElement* e = eIt->next();
6920 if ( !edgeSM->Contains(e)) continue;
6921 n2 = e->GetNode( 0 );
6922 if ( n2 == srcNode ) n2 = e->GetNode( 1 );
6925 return error(SMESH_Comment("Wrongly meshed EDGE ") << getMeshDS()->ShapeToIndex( E ));
6927 double uSrc = helper.GetNodeU( E, srcNode, n2 );
6928 double uTgt = helper.GetNodeU( E, tgtNode, srcNode );
6929 double u2 = helper.GetNodeU( E, n2, srcNode );
6933 if ( fabs( uSrc-uTgt ) < 0.99 * fabs( uSrc-u2 ))
6935 // tgtNode is located so that it does not make faces with wrong orientation
6938 edge._pos.resize(1);
6939 edge._pos[0].SetCoord( U_TGT, uTgt );
6940 edge._pos[0].SetCoord( U_SRC, uSrc );
6941 edge._pos[0].SetCoord( LEN_TGT, fabs( uSrc-uTgt ));
6943 edge._simplices.resize( 1 );
6944 edge._simplices[0]._nPrev = n2;
6946 // set U of source node to the target node
6947 SMDS_EdgePosition* pos = static_cast<SMDS_EdgePosition*>( tgtNode->GetPosition() );
6948 pos->SetUParameter( uSrc );
6953 //================================================================================
6955 * \brief Restore position of a sole node of a _LayerEdge based on _noShrinkShapes
6957 //================================================================================
6959 void _ViscousBuilder::restoreNoShrink( _LayerEdge& edge ) const
6961 if ( edge._nodes.size() == 1 )
6966 const SMDS_MeshNode* srcNode = edge._nodes[0];
6967 TopoDS_Shape S = SMESH_MesherHelper::GetSubShapeByNode( srcNode, getMeshDS() );
6968 if ( S.IsNull() ) return;
6972 switch ( S.ShapeType() )
6977 TopLoc_Location loc;
6978 Handle(Geom_Curve) curve = BRep_Tool::Curve( TopoDS::Edge( S ), loc, f, l );
6979 if ( curve.IsNull() ) return;
6980 SMDS_EdgePosition* ePos = static_cast<SMDS_EdgePosition*>( srcNode->GetPosition() );
6981 p = curve->Value( ePos->GetUParameter() );
6986 p = BRep_Tool::Pnt( TopoDS::Vertex( S ));
6991 getMeshDS()->MoveNode( srcNode, p.X(), p.Y(), p.Z() );
6992 dumpMove( srcNode );
6996 //================================================================================
6998 * \brief Try to fix triangles with high aspect ratio by swaping diagonals
7000 //================================================================================
7002 void _ViscousBuilder::fixBadFaces(const TopoDS_Face& F,
7003 SMESH_MesherHelper& helper,
7006 set<const SMDS_MeshNode*> * involvedNodes)
7008 SMESH::Controls::AspectRatio qualifier;
7009 SMESH::Controls::TSequenceOfXYZ points(3), points1(3), points2(3);
7010 const double maxAspectRatio = is2D ? 4. : 2;
7011 _NodeCoordHelper xyz( F, helper, is2D );
7013 // find bad triangles
7015 vector< const SMDS_MeshElement* > badTrias;
7016 vector< double > badAspects;
7017 SMESHDS_SubMesh* sm = helper.GetMeshDS()->MeshElements( F );
7018 SMDS_ElemIteratorPtr fIt = sm->GetElements();
7019 while ( fIt->more() )
7021 const SMDS_MeshElement * f = fIt->next();
7022 if ( f->NbCornerNodes() != 3 ) continue;
7023 for ( int iP = 0; iP < 3; ++iP ) points(iP+1) = xyz( f->GetNode(iP));
7024 double aspect = qualifier.GetValue( points );
7025 if ( aspect > maxAspectRatio )
7027 badTrias.push_back( f );
7028 badAspects.push_back( aspect );
7033 dumpFunction(SMESH_Comment("beforeSwapDiagonals_F")<<helper.GetSubShapeID());
7034 SMDS_ElemIteratorPtr fIt = sm->GetElements();
7035 while ( fIt->more() )
7037 const SMDS_MeshElement * f = fIt->next();
7038 if ( f->NbCornerNodes() == 3 )
7039 dumpChangeNodes( f );
7043 if ( badTrias.empty() )
7046 // find couples of faces to swap diagonal
7048 typedef pair < const SMDS_MeshElement* , const SMDS_MeshElement* > T2Trias;
7049 vector< T2Trias > triaCouples;
7051 TIDSortedElemSet involvedFaces, emptySet;
7052 for ( size_t iTia = 0; iTia < badTrias.size(); ++iTia )
7055 double aspRatio [3];
7058 if ( !involvedFaces.insert( badTrias[iTia] ).second )
7060 for ( int iP = 0; iP < 3; ++iP )
7061 points(iP+1) = xyz( badTrias[iTia]->GetNode(iP));
7063 // find triangles adjacent to badTrias[iTia] with better aspect ratio after diag-swaping
7064 int bestCouple = -1;
7065 for ( int iSide = 0; iSide < 3; ++iSide )
7067 const SMDS_MeshNode* n1 = badTrias[iTia]->GetNode( iSide );
7068 const SMDS_MeshNode* n2 = badTrias[iTia]->GetNode(( iSide+1 ) % 3 );
7069 trias [iSide].first = badTrias[iTia];
7070 trias [iSide].second = SMESH_MeshAlgos::FindFaceInSet( n1, n2, emptySet, involvedFaces,
7072 if (( ! trias[iSide].second ) ||
7073 ( trias[iSide].second->NbCornerNodes() != 3 ) ||
7074 ( ! sm->Contains( trias[iSide].second )))
7077 // aspect ratio of an adjacent tria
7078 for ( int iP = 0; iP < 3; ++iP )
7079 points2(iP+1) = xyz( trias[iSide].second->GetNode(iP));
7080 double aspectInit = qualifier.GetValue( points2 );
7082 // arrange nodes as after diag-swaping
7083 if ( helper.WrapIndex( i1+1, 3 ) == i2 )
7084 i3 = helper.WrapIndex( i1-1, 3 );
7086 i3 = helper.WrapIndex( i1+1, 3 );
7088 points1( 1+ iSide ) = points2( 1+ i3 );
7089 points2( 1+ i2 ) = points1( 1+ ( iSide+2 ) % 3 );
7091 // aspect ratio after diag-swaping
7092 aspRatio[ iSide ] = qualifier.GetValue( points1 ) + qualifier.GetValue( points2 );
7093 if ( aspRatio[ iSide ] > aspectInit + badAspects[ iTia ] )
7096 // prevent inversion of a triangle
7097 gp_Vec norm1 = gp_Vec( points1(1), points1(3) ) ^ gp_Vec( points1(1), points1(2) );
7098 gp_Vec norm2 = gp_Vec( points2(1), points2(3) ) ^ gp_Vec( points2(1), points2(2) );
7099 if ( norm1 * norm2 < 0. && norm1.Angle( norm2 ) > 70./180.*M_PI )
7102 if ( bestCouple < 0 || aspRatio[ bestCouple ] > aspRatio[ iSide ] )
7106 if ( bestCouple >= 0 )
7108 triaCouples.push_back( trias[bestCouple] );
7109 involvedFaces.insert ( trias[bestCouple].second );
7113 involvedFaces.erase( badTrias[iTia] );
7116 if ( triaCouples.empty() )
7121 SMESH_MeshEditor editor( helper.GetMesh() );
7122 dumpFunction(SMESH_Comment("beforeSwapDiagonals_F")<<helper.GetSubShapeID()<<"_"<<step);
7123 for ( size_t i = 0; i < triaCouples.size(); ++i )
7125 dumpChangeNodes( triaCouples[i].first );
7126 dumpChangeNodes( triaCouples[i].second );
7127 editor.InverseDiag( triaCouples[i].first, triaCouples[i].second );
7130 if ( involvedNodes )
7131 for ( size_t i = 0; i < triaCouples.size(); ++i )
7133 involvedNodes->insert( triaCouples[i].first->begin_nodes(),
7134 triaCouples[i].first->end_nodes() );
7135 involvedNodes->insert( triaCouples[i].second->begin_nodes(),
7136 triaCouples[i].second->end_nodes() );
7139 // just for debug dump resulting triangles
7140 dumpFunction(SMESH_Comment("swapDiagonals_F")<<helper.GetSubShapeID()<<"_"<<step);
7141 for ( size_t i = 0; i < triaCouples.size(); ++i )
7143 dumpChangeNodes( triaCouples[i].first );
7144 dumpChangeNodes( triaCouples[i].second );
7148 //================================================================================
7150 * \brief Move target node to it's final position on the FACE during shrinking
7152 //================================================================================
7154 bool _LayerEdge::SetNewLength2d( Handle(Geom_Surface)& surface,
7155 const TopoDS_Face& F,
7157 SMESH_MesherHelper& helper )
7160 return false; // already at the target position
7162 SMDS_MeshNode* tgtNode = const_cast< SMDS_MeshNode*& >( _nodes.back() );
7164 if ( eos.SWOLType() == TopAbs_FACE )
7166 gp_XY curUV = helper.GetNodeUV( F, tgtNode );
7167 gp_Pnt2d tgtUV( _pos[0].X(), _pos[0].Y() );
7168 gp_Vec2d uvDir( _normal.X(), _normal.Y() );
7169 const double uvLen = tgtUV.Distance( curUV );
7170 const double kSafe = Max( 0.5, 1. - 0.1 * _simplices.size() );
7172 // Select shrinking step such that not to make faces with wrong orientation.
7173 double stepSize = 1e100;
7174 for ( size_t i = 0; i < _simplices.size(); ++i )
7176 // find intersection of 2 lines: curUV-tgtUV and that connecting simplex nodes
7177 gp_XY uvN1 = helper.GetNodeUV( F, _simplices[i]._nPrev );
7178 gp_XY uvN2 = helper.GetNodeUV( F, _simplices[i]._nNext );
7179 gp_XY dirN = uvN2 - uvN1;
7180 double det = uvDir.Crossed( dirN );
7181 if ( Abs( det ) < std::numeric_limits<double>::min() ) continue;
7182 gp_XY dirN2Cur = curUV - uvN1;
7183 double step = dirN.Crossed( dirN2Cur ) / det;
7185 stepSize = Min( step, stepSize );
7188 if ( uvLen <= stepSize )
7193 else if ( stepSize > 0 )
7195 newUV = curUV + uvDir.XY() * stepSize * kSafe;
7201 SMDS_FacePosition* pos = static_cast<SMDS_FacePosition*>( tgtNode->GetPosition() );
7202 pos->SetUParameter( newUV.X() );
7203 pos->SetVParameter( newUV.Y() );
7206 gp_Pnt p = surface->Value( newUV.X(), newUV.Y() );
7207 tgtNode->setXYZ( p.X(), p.Y(), p.Z() );
7208 dumpMove( tgtNode );
7211 else // _sWOL is TopAbs_EDGE
7213 const TopoDS_Edge& E = TopoDS::Edge( eos._sWOL );
7214 const SMDS_MeshNode* n2 = _simplices[0]._nPrev;
7215 SMDS_EdgePosition* tgtPos = static_cast<SMDS_EdgePosition*>( tgtNode->GetPosition() );
7217 const double u2 = helper.GetNodeU( E, n2, tgtNode );
7218 const double uSrc = _pos[0].Coord( U_SRC );
7219 const double lenTgt = _pos[0].Coord( LEN_TGT );
7221 double newU = _pos[0].Coord( U_TGT );
7222 if ( lenTgt < 0.99 * fabs( uSrc-u2 )) // n2 got out of src-tgt range
7228 newU = 0.1 * tgtPos->GetUParameter() + 0.9 * u2;
7230 tgtPos->SetUParameter( newU );
7232 gp_XY newUV = helper.GetNodeUV( F, tgtNode, _nodes[0]);
7233 gp_Pnt p = surface->Value( newUV.X(), newUV.Y() );
7234 tgtNode->setXYZ( p.X(), p.Y(), p.Z() );
7235 dumpMove( tgtNode );
7241 //================================================================================
7243 * \brief Perform smooth on the FACE
7244 * \retval bool - true if the node has been moved
7246 //================================================================================
7248 bool _SmoothNode::Smooth(int& badNb,
7249 Handle(Geom_Surface)& surface,
7250 SMESH_MesherHelper& helper,
7251 const double refSign,
7255 const TopoDS_Face& face = TopoDS::Face( helper.GetSubShape() );
7257 // get uv of surrounding nodes
7258 vector<gp_XY> uv( _simplices.size() );
7259 for ( size_t i = 0; i < _simplices.size(); ++i )
7260 uv[i] = helper.GetNodeUV( face, _simplices[i]._nPrev, _node );
7262 // compute new UV for the node
7264 if ( how == TFI && _simplices.size() == 4 )
7267 for ( size_t i = 0; i < _simplices.size(); ++i )
7268 if ( _simplices[i]._nOpp )
7269 corners[i] = helper.GetNodeUV( face, _simplices[i]._nOpp, _node );
7271 throw SALOME_Exception(LOCALIZED("TFI smoothing: _Simplex::_nOpp not set!"));
7273 newPos = helper.calcTFI ( 0.5, 0.5,
7274 corners[0], corners[1], corners[2], corners[3],
7275 uv[1], uv[2], uv[3], uv[0] );
7277 else if ( how == ANGULAR )
7279 newPos = computeAngularPos( uv, helper.GetNodeUV( face, _node ), refSign );
7281 else if ( how == CENTROIDAL && _simplices.size() > 3 )
7283 // average centers of diagonals wieghted with their reciprocal lengths
7284 if ( _simplices.size() == 4 )
7286 double w1 = 1. / ( uv[2]-uv[0] ).SquareModulus();
7287 double w2 = 1. / ( uv[3]-uv[1] ).SquareModulus();
7288 newPos = ( w1 * ( uv[2]+uv[0] ) + w2 * ( uv[3]+uv[1] )) / ( w1+w2 ) / 2;
7292 double sumWeight = 0;
7293 int nb = _simplices.size() == 4 ? 2 : _simplices.size();
7294 for ( int i = 0; i < nb; ++i )
7297 int iTo = i + _simplices.size() - 1;
7298 for ( int j = iFrom; j < iTo; ++j )
7300 int i2 = SMESH_MesherHelper::WrapIndex( j, _simplices.size() );
7301 double w = 1. / ( uv[i]-uv[i2] ).SquareModulus();
7303 newPos += w * ( uv[i]+uv[i2] );
7306 newPos /= 2 * sumWeight; // 2 is to get a middle between uv's
7312 for ( size_t i = 0; i < _simplices.size(); ++i )
7314 newPos /= _simplices.size();
7317 // count quality metrics (orientation) of triangles around the node
7319 gp_XY tgtUV = helper.GetNodeUV( face, _node );
7320 for ( size_t i = 0; i < _simplices.size(); ++i )
7321 nbOkBefore += _simplices[i].IsForward( tgtUV, _node, face, helper, refSign );
7324 for ( size_t i = 0; i < _simplices.size(); ++i )
7325 nbOkAfter += _simplices[i].IsForward( newPos, _node, face, helper, refSign );
7327 if ( nbOkAfter < nbOkBefore )
7329 badNb += _simplices.size() - nbOkBefore;
7333 SMDS_FacePosition* pos = static_cast<SMDS_FacePosition*>( _node->GetPosition() );
7334 pos->SetUParameter( newPos.X() );
7335 pos->SetVParameter( newPos.Y() );
7342 gp_Pnt p = surface->Value( newPos.X(), newPos.Y() );
7343 const_cast< SMDS_MeshNode* >( _node )->setXYZ( p.X(), p.Y(), p.Z() );
7347 badNb += _simplices.size() - nbOkAfter;
7348 return ( (tgtUV-newPos).SquareModulus() > 1e-10 );
7351 //================================================================================
7353 * \brief Computes new UV using angle based smoothing technic
7355 //================================================================================
7357 gp_XY _SmoothNode::computeAngularPos(vector<gp_XY>& uv,
7358 const gp_XY& uvToFix,
7359 const double refSign)
7361 uv.push_back( uv.front() );
7363 vector< gp_XY > edgeDir ( uv.size() );
7364 vector< double > edgeSize( uv.size() );
7365 for ( size_t i = 1; i < edgeDir.size(); ++i )
7367 edgeDir [i-1] = uv[i] - uv[i-1];
7368 edgeSize[i-1] = edgeDir[i-1].Modulus();
7369 if ( edgeSize[i-1] < numeric_limits<double>::min() )
7370 edgeDir[i-1].SetX( 100 );
7372 edgeDir[i-1] /= edgeSize[i-1] * refSign;
7374 edgeDir.back() = edgeDir.front();
7375 edgeSize.back() = edgeSize.front();
7380 for ( size_t i = 1; i < edgeDir.size(); ++i )
7382 if ( edgeDir[i-1].X() > 1. ) continue;
7384 while ( edgeDir[i].X() > 1. && ++i < edgeDir.size() );
7385 if ( i == edgeDir.size() ) break;
7387 gp_XY norm1( -edgeDir[i1].Y(), edgeDir[i1].X() );
7388 gp_XY norm2( -edgeDir[i].Y(), edgeDir[i].X() );
7389 gp_XY bisec = norm1 + norm2;
7390 double bisecSize = bisec.Modulus();
7391 if ( bisecSize < numeric_limits<double>::min() )
7393 bisec = -edgeDir[i1] + edgeDir[i];
7394 bisecSize = bisec.Modulus();
7398 gp_XY dirToN = uvToFix - p;
7399 double distToN = dirToN.Modulus();
7400 if ( bisec * dirToN < 0 )
7403 newPos += ( p + bisec * distToN ) * ( edgeSize[i1] + edgeSize[i] );
7405 sumSize += edgeSize[i1] + edgeSize[i];
7407 newPos /= /*nbEdges * */sumSize;
7411 //================================================================================
7413 * \brief Delete _SolidData
7415 //================================================================================
7417 _SolidData::~_SolidData()
7419 TNode2Edge::iterator n2e = _n2eMap.begin();
7420 for ( ; n2e != _n2eMap.end(); ++n2e )
7422 _LayerEdge* & e = n2e->second;
7423 if ( e && e->_2neibors )
7424 delete e->_2neibors;
7430 //================================================================================
7432 * \brief Keep a _LayerEdge inflated along the EDGE
7434 //================================================================================
7436 void _Shrinker1D::AddEdge( const _LayerEdge* e,
7438 SMESH_MesherHelper& helper )
7441 if ( _nodes.empty() )
7443 _edges[0] = _edges[1] = 0;
7447 if ( e == _edges[0] || e == _edges[1] )
7449 if ( eos.SWOLType() != TopAbs_EDGE )
7450 throw SALOME_Exception(LOCALIZED("Wrong _LayerEdge is added"));
7451 if ( _edges[0] && !_geomEdge.IsSame( eos._sWOL ))
7452 throw SALOME_Exception(LOCALIZED("Wrong _LayerEdge is added"));
7455 _geomEdge = TopoDS::Edge( eos._sWOL );
7457 BRep_Tool::Range( _geomEdge, f,l );
7458 double u = helper.GetNodeU( _geomEdge, e->_nodes[0], e->_nodes.back());
7459 _edges[ u < 0.5*(f+l) ? 0 : 1 ] = e;
7463 const SMDS_MeshNode* tgtNode0 = _edges[0] ? _edges[0]->_nodes.back() : 0;
7464 const SMDS_MeshNode* tgtNode1 = _edges[1] ? _edges[1]->_nodes.back() : 0;
7466 if ( _nodes.empty() )
7468 SMESHDS_SubMesh * eSubMesh = helper.GetMeshDS()->MeshElements( _geomEdge );
7469 if ( !eSubMesh || eSubMesh->NbNodes() < 1 )
7471 TopLoc_Location loc;
7472 Handle(Geom_Curve) C = BRep_Tool::Curve( _geomEdge, loc, f,l );
7473 GeomAdaptor_Curve aCurve(C, f,l);
7474 const double totLen = GCPnts_AbscissaPoint::Length(aCurve, f, l);
7476 int nbExpectNodes = eSubMesh->NbNodes();
7477 _initU .reserve( nbExpectNodes );
7478 _normPar.reserve( nbExpectNodes );
7479 _nodes .reserve( nbExpectNodes );
7480 SMDS_NodeIteratorPtr nIt = eSubMesh->GetNodes();
7481 while ( nIt->more() )
7483 const SMDS_MeshNode* node = nIt->next();
7484 if ( node->NbInverseElements(SMDSAbs_Edge) == 0 ||
7485 node == tgtNode0 || node == tgtNode1 )
7486 continue; // refinement nodes
7487 _nodes.push_back( node );
7488 _initU.push_back( helper.GetNodeU( _geomEdge, node ));
7489 double len = GCPnts_AbscissaPoint::Length(aCurve, f, _initU.back());
7490 _normPar.push_back( len / totLen );
7495 // remove target node of the _LayerEdge from _nodes
7497 for ( size_t i = 0; i < _nodes.size(); ++i )
7498 if ( !_nodes[i] || _nodes[i] == tgtNode0 || _nodes[i] == tgtNode1 )
7499 _nodes[i] = 0, nbFound++;
7500 if ( nbFound == _nodes.size() )
7505 //================================================================================
7507 * \brief Move nodes on EDGE from ends where _LayerEdge's are inflated
7509 //================================================================================
7511 void _Shrinker1D::Compute(bool set3D, SMESH_MesherHelper& helper)
7513 if ( _done || _nodes.empty())
7515 const _LayerEdge* e = _edges[0];
7516 if ( !e ) e = _edges[1];
7519 _done = (( !_edges[0] || _edges[0]->_pos.empty() ) &&
7520 ( !_edges[1] || _edges[1]->_pos.empty() ));
7523 if ( set3D || _done )
7525 Handle(Geom_Curve) C = BRep_Tool::Curve(_geomEdge, f,l);
7526 GeomAdaptor_Curve aCurve(C, f,l);
7529 f = helper.GetNodeU( _geomEdge, _edges[0]->_nodes.back(), _nodes[0] );
7531 l = helper.GetNodeU( _geomEdge, _edges[1]->_nodes.back(), _nodes.back() );
7532 double totLen = GCPnts_AbscissaPoint::Length( aCurve, f, l );
7534 for ( size_t i = 0; i < _nodes.size(); ++i )
7536 if ( !_nodes[i] ) continue;
7537 double len = totLen * _normPar[i];
7538 GCPnts_AbscissaPoint discret( aCurve, len, f );
7539 if ( !discret.IsDone() )
7540 return throw SALOME_Exception(LOCALIZED("GCPnts_AbscissaPoint failed"));
7541 double u = discret.Parameter();
7542 SMDS_EdgePosition* pos = static_cast<SMDS_EdgePosition*>( _nodes[i]->GetPosition() );
7543 pos->SetUParameter( u );
7544 gp_Pnt p = C->Value( u );
7545 const_cast< SMDS_MeshNode*>( _nodes[i] )->setXYZ( p.X(), p.Y(), p.Z() );
7550 BRep_Tool::Range( _geomEdge, f,l );
7552 f = helper.GetNodeU( _geomEdge, _edges[0]->_nodes.back(), _nodes[0] );
7554 l = helper.GetNodeU( _geomEdge, _edges[1]->_nodes.back(), _nodes.back() );
7556 for ( size_t i = 0; i < _nodes.size(); ++i )
7558 if ( !_nodes[i] ) continue;
7559 double u = f * ( 1-_normPar[i] ) + l * _normPar[i];
7560 SMDS_EdgePosition* pos = static_cast<SMDS_EdgePosition*>( _nodes[i]->GetPosition() );
7561 pos->SetUParameter( u );
7566 //================================================================================
7568 * \brief Restore initial parameters of nodes on EDGE
7570 //================================================================================
7572 void _Shrinker1D::RestoreParams()
7575 for ( size_t i = 0; i < _nodes.size(); ++i )
7577 if ( !_nodes[i] ) continue;
7578 SMDS_EdgePosition* pos = static_cast<SMDS_EdgePosition*>( _nodes[i]->GetPosition() );
7579 pos->SetUParameter( _initU[i] );
7584 //================================================================================
7586 * \brief Replace source nodes by target nodes in shrinked mesh edges
7588 //================================================================================
7590 void _Shrinker1D::SwapSrcTgtNodes( SMESHDS_Mesh* mesh )
7592 const SMDS_MeshNode* nodes[3];
7593 for ( int i = 0; i < 2; ++i )
7595 if ( !_edges[i] ) continue;
7597 SMESHDS_SubMesh * eSubMesh = mesh->MeshElements( _geomEdge );
7598 if ( !eSubMesh ) return;
7599 const SMDS_MeshNode* srcNode = _edges[i]->_nodes[0];
7600 const SMDS_MeshNode* tgtNode = _edges[i]->_nodes.back();
7601 SMDS_ElemIteratorPtr eIt = srcNode->GetInverseElementIterator(SMDSAbs_Edge);
7602 while ( eIt->more() )
7604 const SMDS_MeshElement* e = eIt->next();
7605 if ( !eSubMesh->Contains( e ))
7607 SMDS_ElemIteratorPtr nIt = e->nodesIterator();
7608 for ( int iN = 0; iN < e->NbNodes(); ++iN )
7610 const SMDS_MeshNode* n = static_cast<const SMDS_MeshNode*>( nIt->next() );
7611 nodes[iN] = ( n == srcNode ? tgtNode : n );
7613 mesh->ChangeElementNodes( e, nodes, e->NbNodes() );
7618 //================================================================================
7620 * \brief Creates 2D and 1D elements on boundaries of new prisms
7622 //================================================================================
7624 bool _ViscousBuilder::addBoundaryElements()
7626 SMESH_MesherHelper helper( *_mesh );
7628 vector< const SMDS_MeshNode* > faceNodes;
7630 for ( size_t i = 0; i < _sdVec.size(); ++i )
7632 _SolidData& data = _sdVec[i];
7633 TopTools_IndexedMapOfShape geomEdges;
7634 TopExp::MapShapes( data._solid, TopAbs_EDGE, geomEdges );
7635 for ( int iE = 1; iE <= geomEdges.Extent(); ++iE )
7637 const TopoDS_Edge& E = TopoDS::Edge( geomEdges(iE));
7638 if ( data._noShrinkShapes.count( getMeshDS()->ShapeToIndex( E )))
7641 // Get _LayerEdge's based on E
7643 map< double, const SMDS_MeshNode* > u2nodes;
7644 if ( !SMESH_Algo::GetSortedNodesOnEdge( getMeshDS(), E, /*ignoreMedium=*/false, u2nodes))
7647 vector< _LayerEdge* > ledges; ledges.reserve( u2nodes.size() );
7648 TNode2Edge & n2eMap = data._n2eMap;
7649 map< double, const SMDS_MeshNode* >::iterator u2n = u2nodes.begin();
7651 //check if 2D elements are needed on E
7652 TNode2Edge::iterator n2e = n2eMap.find( u2n->second );
7653 if ( n2e == n2eMap.end() ) continue; // no layers on vertex
7654 ledges.push_back( n2e->second );
7656 if (( n2e = n2eMap.find( u2n->second )) == n2eMap.end() )
7657 continue; // no layers on E
7658 ledges.push_back( n2eMap[ u2n->second ]);
7660 const SMDS_MeshNode* tgtN0 = ledges[0]->_nodes.back();
7661 const SMDS_MeshNode* tgtN1 = ledges[1]->_nodes.back();
7662 int nbSharedPyram = 0;
7663 SMDS_ElemIteratorPtr vIt = tgtN0->GetInverseElementIterator(SMDSAbs_Volume);
7664 while ( vIt->more() )
7666 const SMDS_MeshElement* v = vIt->next();
7667 nbSharedPyram += int( v->GetNodeIndex( tgtN1 ) >= 0 );
7669 if ( nbSharedPyram > 1 )
7670 continue; // not free border of the pyramid
7673 faceNodes.push_back( ledges[0]->_nodes[0] );
7674 faceNodes.push_back( ledges[1]->_nodes[0] );
7675 if ( ledges[0]->_nodes.size() > 1 ) faceNodes.push_back( ledges[0]->_nodes[1] );
7676 if ( ledges[1]->_nodes.size() > 1 ) faceNodes.push_back( ledges[1]->_nodes[1] );
7678 if ( getMeshDS()->FindElement( faceNodes, SMDSAbs_Face, /*noMedium=*/true))
7679 continue; // faces already created
7681 for ( ++u2n; u2n != u2nodes.end(); ++u2n )
7682 ledges.push_back( n2eMap[ u2n->second ]);
7684 // Find out orientation and type of face to create
7686 bool reverse = false, isOnFace;
7688 map< TGeomID, TopoDS_Shape >::iterator e2f =
7689 data._shrinkShape2Shape.find( getMeshDS()->ShapeToIndex( E ));
7691 if (( isOnFace = ( e2f != data._shrinkShape2Shape.end() )))
7693 F = e2f->second.Oriented( TopAbs_FORWARD );
7694 reverse = ( helper.GetSubShapeOri( F, E ) == TopAbs_REVERSED );
7695 if ( helper.GetSubShapeOri( data._solid, F ) == TopAbs_REVERSED )
7696 reverse = !reverse, F.Reverse();
7697 if ( helper.IsReversedSubMesh( TopoDS::Face(F) ))
7702 // find FACE with layers sharing E
7703 PShapeIteratorPtr fIt = helper.GetAncestors( E, *_mesh, TopAbs_FACE );
7704 while ( fIt->more() && F.IsNull() )
7706 const TopoDS_Shape* pF = fIt->next();
7707 if ( helper.IsSubShape( *pF, data._solid) &&
7708 !data._ignoreFaceIds.count( e2f->first ))
7712 // Find the sub-mesh to add new faces
7713 SMESHDS_SubMesh* sm = 0;
7715 sm = getMeshDS()->MeshElements( F );
7717 sm = data._proxyMesh->getFaceSubM( TopoDS::Face(F), /*create=*/true );
7719 return error("error in addBoundaryElements()", data._index);
7722 const int dj1 = reverse ? 0 : 1;
7723 const int dj2 = reverse ? 1 : 0;
7724 for ( size_t j = 1; j < ledges.size(); ++j )
7726 vector< const SMDS_MeshNode*>& nn1 = ledges[j-dj1]->_nodes;
7727 vector< const SMDS_MeshNode*>& nn2 = ledges[j-dj2]->_nodes;
7728 if ( nn1.size() == nn2.size() )
7731 for ( size_t z = 1; z < nn1.size(); ++z )
7732 sm->AddElement( getMeshDS()->AddFace( nn1[z-1], nn2[z-1], nn2[z], nn1[z] ));
7734 for ( size_t z = 1; z < nn1.size(); ++z )
7735 sm->AddElement( new SMDS_FaceOfNodes( nn1[z-1], nn2[z-1], nn2[z], nn1[z] ));
7737 else if ( nn1.size() == 1 )
7740 for ( size_t z = 1; z < nn2.size(); ++z )
7741 sm->AddElement( getMeshDS()->AddFace( nn1[0], nn2[z-1], nn2[z] ));
7743 for ( size_t z = 1; z < nn2.size(); ++z )
7744 sm->AddElement( new SMDS_FaceOfNodes( nn1[0], nn2[z-1], nn2[z] ));
7749 for ( size_t z = 1; z < nn1.size(); ++z )
7750 sm->AddElement( getMeshDS()->AddFace( nn1[z-1], nn2[0], nn1[z] ));
7752 for ( size_t z = 1; z < nn1.size(); ++z )
7753 sm->AddElement( new SMDS_FaceOfNodes( nn1[z-1], nn2[0], nn2[z] ));
7758 for ( int isFirst = 0; isFirst < 2; ++isFirst )
7760 _LayerEdge* edge = isFirst ? ledges.front() : ledges.back();
7761 _EdgesOnShape* eos = data.GetShapeEdges( edge );
7762 if ( eos && eos->SWOLType() == TopAbs_EDGE )
7764 vector< const SMDS_MeshNode*>& nn = edge->_nodes;
7765 if ( nn.size() < 2 || nn[1]->GetInverseElementIterator( SMDSAbs_Edge )->more() )
7767 helper.SetSubShape( eos->_sWOL );
7768 helper.SetElementsOnShape( true );
7769 for ( size_t z = 1; z < nn.size(); ++z )
7770 helper.AddEdge( nn[z-1], nn[z] );
7775 } // loop on _SolidData's