1 // Copyright (C) 2007-2016 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 "SMESHDS_Mesh.hxx"
34 #include "SMESH_Algo.hxx"
35 #include "SMESH_ComputeError.hxx"
36 #include "SMESH_ControlsDef.hxx"
37 #include "SMESH_Gen.hxx"
38 #include "SMESH_Group.hxx"
39 #include "SMESH_HypoFilter.hxx"
40 #include "SMESH_Mesh.hxx"
41 #include "SMESH_MeshAlgos.hxx"
42 #include "SMESH_MesherHelper.hxx"
43 #include "SMESH_ProxyMesh.hxx"
44 #include "SMESH_subMesh.hxx"
45 #include "SMESH_subMeshEventListener.hxx"
46 #include "StdMeshers_FaceSide.hxx"
47 #include "StdMeshers_ViscousLayers2D.hxx"
49 #include <Adaptor3d_HSurface.hxx>
50 #include <BRepAdaptor_Curve.hxx>
51 #include <BRepAdaptor_Curve2d.hxx>
52 #include <BRepAdaptor_Surface.hxx>
53 //#include <BRepLProp_CLProps.hxx>
54 #include <BRepLProp_SLProps.hxx>
55 #include <BRepOffsetAPI_MakeOffsetShape.hxx>
56 #include <BRep_Tool.hxx>
57 #include <Bnd_B2d.hxx>
58 #include <Bnd_B3d.hxx>
60 #include <GCPnts_AbscissaPoint.hxx>
61 #include <GCPnts_TangentialDeflection.hxx>
62 #include <Geom2d_Circle.hxx>
63 #include <Geom2d_Line.hxx>
64 #include <Geom2d_TrimmedCurve.hxx>
65 #include <GeomAdaptor_Curve.hxx>
66 #include <GeomLib.hxx>
67 #include <Geom_Circle.hxx>
68 #include <Geom_Curve.hxx>
69 #include <Geom_Line.hxx>
70 #include <Geom_TrimmedCurve.hxx>
71 #include <Precision.hxx>
72 #include <Standard_ErrorHandler.hxx>
73 #include <Standard_Failure.hxx>
74 #include <TColStd_Array1OfReal.hxx>
76 #include <TopExp_Explorer.hxx>
77 #include <TopTools_IndexedMapOfShape.hxx>
78 #include <TopTools_ListOfShape.hxx>
79 #include <TopTools_MapIteratorOfMapOfShape.hxx>
80 #include <TopTools_MapOfShape.hxx>
82 #include <TopoDS_Edge.hxx>
83 #include <TopoDS_Face.hxx>
84 #include <TopoDS_Vertex.hxx>
86 #include <gp_Cone.hxx>
87 #include <gp_Sphere.hxx>
99 //#define __NOT_INVALIDATE_BAD_SMOOTH
100 //#define __NODES_AT_POS
103 #define INCREMENTAL_SMOOTH // smooth only if min angle is too small
104 #define BLOCK_INFLATION // of individual _LayerEdge's
105 #define OLD_NEF_POLYGON
109 //================================================================================
114 enum UIndex { U_TGT = 1, U_SRC, LEN_TGT };
116 const double theMinSmoothCosin = 0.1;
117 const double theSmoothThickToElemSizeRatio = 0.3;
118 const double theMinSmoothTriaAngle = 30;
119 const double theMinSmoothQuadAngle = 45;
121 // what part of thickness is allowed till intersection
122 // (defined by SALOME_TESTS/Grids/smesh/viscous_layers_00/A5)
123 const double theThickToIntersection = 1.5;
125 bool needSmoothing( double cosin, double tgtThick, double elemSize )
127 return cosin * tgtThick > theSmoothThickToElemSizeRatio * elemSize;
129 double getSmoothingThickness( double cosin, double elemSize )
131 return theSmoothThickToElemSizeRatio * elemSize / cosin;
135 * \brief SMESH_ProxyMesh computed by _ViscousBuilder for a SOLID.
136 * It is stored in a SMESH_subMesh of the SOLID as SMESH_subMeshEventListenerData
138 struct _MeshOfSolid : public SMESH_ProxyMesh,
139 public SMESH_subMeshEventListenerData
141 bool _n2nMapComputed;
142 SMESH_ComputeErrorPtr _warning;
144 _MeshOfSolid( SMESH_Mesh* mesh)
145 :SMESH_subMeshEventListenerData( /*isDeletable=*/true),_n2nMapComputed(false)
147 SMESH_ProxyMesh::setMesh( *mesh );
150 // returns submesh for a geom face
151 SMESH_ProxyMesh::SubMesh* getFaceSubM(const TopoDS_Face& F, bool create=false)
153 TGeomID i = SMESH_ProxyMesh::shapeIndex(F);
154 return create ? SMESH_ProxyMesh::getProxySubMesh(i) : findProxySubMesh(i);
156 void setNode2Node(const SMDS_MeshNode* srcNode,
157 const SMDS_MeshNode* proxyNode,
158 const SMESH_ProxyMesh::SubMesh* subMesh)
160 SMESH_ProxyMesh::setNode2Node( srcNode,proxyNode,subMesh);
163 //--------------------------------------------------------------------------------
165 * \brief Listener of events of 3D sub-meshes computed with viscous layers.
166 * It is used to clear an inferior dim sub-meshes modified by viscous layers
168 class _ShrinkShapeListener : SMESH_subMeshEventListener
170 _ShrinkShapeListener()
171 : SMESH_subMeshEventListener(/*isDeletable=*/false,
172 "StdMeshers_ViscousLayers::_ShrinkShapeListener") {}
174 static SMESH_subMeshEventListener* Get() { static _ShrinkShapeListener l; return &l; }
175 virtual void ProcessEvent(const int event,
177 SMESH_subMesh* solidSM,
178 SMESH_subMeshEventListenerData* data,
179 const SMESH_Hypothesis* hyp)
181 if ( SMESH_subMesh::COMPUTE_EVENT == eventType && solidSM->IsEmpty() && data )
183 SMESH_subMeshEventListener::ProcessEvent(event,eventType,solidSM,data,hyp);
187 //--------------------------------------------------------------------------------
189 * \brief Listener of events of 3D sub-meshes computed with viscous layers.
190 * It is used to store data computed by _ViscousBuilder for a sub-mesh and to
191 * delete the data as soon as it has been used
193 class _ViscousListener : SMESH_subMeshEventListener
196 SMESH_subMeshEventListener(/*isDeletable=*/false,
197 "StdMeshers_ViscousLayers::_ViscousListener") {}
198 static SMESH_subMeshEventListener* Get() { static _ViscousListener l; return &l; }
200 virtual void ProcessEvent(const int event,
202 SMESH_subMesh* subMesh,
203 SMESH_subMeshEventListenerData* data,
204 const SMESH_Hypothesis* hyp)
206 if (( SMESH_subMesh::COMPUTE_EVENT == eventType ) &&
207 ( SMESH_subMesh::CHECK_COMPUTE_STATE != event &&
208 SMESH_subMesh::SUBMESH_COMPUTED != event ))
210 // delete SMESH_ProxyMesh containing temporary faces
211 subMesh->DeleteEventListener( this );
214 // Finds or creates proxy mesh of the solid
215 static _MeshOfSolid* GetSolidMesh(SMESH_Mesh* mesh,
216 const TopoDS_Shape& solid,
219 if ( !mesh ) return 0;
220 SMESH_subMesh* sm = mesh->GetSubMesh(solid);
221 _MeshOfSolid* data = (_MeshOfSolid*) sm->GetEventListenerData( Get() );
222 if ( !data && toCreate )
224 data = new _MeshOfSolid(mesh);
225 data->mySubMeshes.push_back( sm ); // to find SOLID by _MeshOfSolid
226 sm->SetEventListener( Get(), data, sm );
230 // Removes proxy mesh of the solid
231 static void RemoveSolidMesh(SMESH_Mesh* mesh, const TopoDS_Shape& solid)
233 mesh->GetSubMesh(solid)->DeleteEventListener( _ViscousListener::Get() );
237 //================================================================================
239 * \brief sets a sub-mesh event listener to clear sub-meshes of sub-shapes of
240 * the main shape when sub-mesh of the main shape is cleared,
241 * for example to clear sub-meshes of FACEs when sub-mesh of a SOLID
244 //================================================================================
246 void ToClearSubWithMain( SMESH_subMesh* sub, const TopoDS_Shape& main)
248 SMESH_subMesh* mainSM = sub->GetFather()->GetSubMesh( main );
249 SMESH_subMeshEventListenerData* data =
250 mainSM->GetEventListenerData( _ShrinkShapeListener::Get());
253 if ( find( data->mySubMeshes.begin(), data->mySubMeshes.end(), sub ) ==
254 data->mySubMeshes.end())
255 data->mySubMeshes.push_back( sub );
259 data = SMESH_subMeshEventListenerData::MakeData( /*dependent=*/sub );
260 sub->SetEventListener( _ShrinkShapeListener::Get(), data, /*whereToListenTo=*/mainSM );
264 //--------------------------------------------------------------------------------
266 * \brief Simplex (triangle or tetrahedron) based on 1 (tria) or 2 (tet) nodes of
267 * _LayerEdge and 2 nodes of the mesh surface beening smoothed.
268 * The class is used to check validity of face or volumes around a smoothed node;
269 * it stores only 2 nodes as the other nodes are stored by _LayerEdge.
273 const SMDS_MeshNode *_nPrev, *_nNext; // nodes on a smoothed mesh surface
274 const SMDS_MeshNode *_nOpp; // in 2D case, a node opposite to a smoothed node in QUAD
275 _Simplex(const SMDS_MeshNode* nPrev=0,
276 const SMDS_MeshNode* nNext=0,
277 const SMDS_MeshNode* nOpp=0)
278 : _nPrev(nPrev), _nNext(nNext), _nOpp(nOpp) {}
279 bool IsForward(const gp_XYZ* pntSrc, const gp_XYZ* pntTgt, double& vol) const
281 const double M[3][3] =
282 {{ _nNext->X() - pntSrc->X(), _nNext->Y() - pntSrc->Y(), _nNext->Z() - pntSrc->Z() },
283 { pntTgt->X() - pntSrc->X(), pntTgt->Y() - pntSrc->Y(), pntTgt->Z() - pntSrc->Z() },
284 { _nPrev->X() - pntSrc->X(), _nPrev->Y() - pntSrc->Y(), _nPrev->Z() - pntSrc->Z() }};
285 vol = ( + M[0][0] * M[1][1] * M[2][2]
286 + M[0][1] * M[1][2] * M[2][0]
287 + M[0][2] * M[1][0] * M[2][1]
288 - M[0][0] * M[1][2] * M[2][1]
289 - M[0][1] * M[1][0] * M[2][2]
290 - M[0][2] * M[1][1] * M[2][0]);
293 bool IsForward(const SMDS_MeshNode* nSrc, const gp_XYZ& pTgt, double& vol) const
295 SMESH_TNodeXYZ pSrc( nSrc );
296 return IsForward( &pSrc, &pTgt, vol );
298 bool IsForward(const gp_XY& tgtUV,
299 const SMDS_MeshNode* smoothedNode,
300 const TopoDS_Face& face,
301 SMESH_MesherHelper& helper,
302 const double refSign) const
304 gp_XY prevUV = helper.GetNodeUV( face, _nPrev, smoothedNode );
305 gp_XY nextUV = helper.GetNodeUV( face, _nNext, smoothedNode );
306 gp_Vec2d v1( tgtUV, prevUV ), v2( tgtUV, nextUV );
308 return d*refSign > 1e-100;
310 bool IsMinAngleOK( const gp_XYZ& pTgt, double& minAngle ) const
312 SMESH_TNodeXYZ pPrev( _nPrev ), pNext( _nNext );
313 if ( !_nOpp ) // triangle
315 gp_Vec tp( pPrev - pTgt ), pn( pNext - pPrev ), nt( pTgt - pNext );
316 double tp2 = tp.SquareMagnitude();
317 double pn2 = pn.SquareMagnitude();
318 double nt2 = nt.SquareMagnitude();
320 if ( tp2 < pn2 && tp2 < nt2 )
321 minAngle = ( nt * -pn ) * ( nt * -pn ) / nt2 / pn2;
322 else if ( pn2 < nt2 )
323 minAngle = ( tp * -nt ) * ( tp * -nt ) / tp2 / nt2;
325 minAngle = ( pn * -tp ) * ( pn * -tp ) / pn2 / tp2;
327 static double theMaxCos2 = ( Cos( theMinSmoothTriaAngle * M_PI / 180. ) *
328 Cos( theMinSmoothTriaAngle * M_PI / 180. ));
329 return minAngle < theMaxCos2;
333 SMESH_TNodeXYZ pOpp( _nOpp );
334 gp_Vec tp( pPrev - pTgt ), po( pOpp - pPrev ), on( pNext - pOpp), nt( pTgt - pNext );
335 double tp2 = tp.SquareMagnitude();
336 double po2 = po.SquareMagnitude();
337 double on2 = on.SquareMagnitude();
338 double nt2 = nt.SquareMagnitude();
339 minAngle = Max( Max((( tp * -nt ) * ( tp * -nt ) / tp2 / nt2 ),
340 (( po * -tp ) * ( po * -tp ) / po2 / tp2 )),
341 Max((( on * -po ) * ( on * -po ) / on2 / po2 ),
342 (( nt * -on ) * ( nt * -on ) / nt2 / on2 )));
344 static double theMaxCos2 = ( Cos( theMinSmoothQuadAngle * M_PI / 180. ) *
345 Cos( theMinSmoothQuadAngle * M_PI / 180. ));
346 return minAngle < theMaxCos2;
349 bool IsNeighbour(const _Simplex& other) const
351 return _nPrev == other._nNext || _nNext == other._nPrev;
353 bool Includes( const SMDS_MeshNode* node ) const { return _nPrev == node || _nNext == node; }
354 static void GetSimplices( const SMDS_MeshNode* node,
355 vector<_Simplex>& simplices,
356 const set<TGeomID>& ingnoreShapes,
357 const _SolidData* dataToCheckOri = 0,
358 const bool toSort = false);
359 static void SortSimplices(vector<_Simplex>& simplices);
361 //--------------------------------------------------------------------------------
363 * Structure used to take into account surface curvature while smoothing
368 double _k; // factor to correct node smoothed position
369 double _h2lenRatio; // avgNormProj / (2*avgDist)
370 gp_Pnt2d _uv; // UV used in putOnOffsetSurface()
372 static _Curvature* New( double avgNormProj, double avgDist )
375 if ( fabs( avgNormProj / avgDist ) > 1./200 )
378 c->_r = avgDist * avgDist / avgNormProj;
379 c->_k = avgDist * avgDist / c->_r / c->_r;
380 //c->_k = avgNormProj / c->_r;
381 c->_k *= ( c->_r < 0 ? 1/1.1 : 1.1 ); // not to be too restrictive
382 c->_h2lenRatio = avgNormProj / ( avgDist + avgDist );
384 c->_uv.SetCoord( 0., 0. );
388 double lenDelta(double len) const { return _k * ( _r + len ); }
389 double lenDeltaByDist(double dist) const { return dist * _h2lenRatio; }
391 //--------------------------------------------------------------------------------
395 struct _EdgesOnShape;
397 typedef map< const SMDS_MeshNode*, _LayerEdge*, TIDCompare > TNode2Edge;
399 //--------------------------------------------------------------------------------
401 * \brief Edge normal to surface, connecting a node on solid surface (_nodes[0])
402 * and a node of the most internal layer (_nodes.back())
406 typedef gp_XYZ (_LayerEdge::*PSmooFun)();
408 vector< const SMDS_MeshNode*> _nodes;
410 gp_XYZ _normal; // to boundary of solid
411 vector<gp_XYZ> _pos; // points computed during inflation
412 double _len; // length achieved with the last inflation step
413 double _maxLen; // maximal possible length
414 double _cosin; // of angle (_normal ^ surface)
415 double _minAngle; // of _simplices
416 double _lenFactor; // to compute _len taking _cosin into account
419 // simplices connected to the source node (_nodes[0]);
420 // used for smoothing and quality check of _LayerEdge's based on the FACE
421 vector<_Simplex> _simplices;
422 vector<_LayerEdge*> _neibors; // all surrounding _LayerEdge's
423 PSmooFun _smooFunction; // smoothing function
424 _Curvature* _curvature;
425 // data for smoothing of _LayerEdge's based on the EDGE
426 _2NearEdges* _2neibors;
428 enum EFlags { TO_SMOOTH = 0x0000001,
429 MOVED = 0x0000002, // set by _neibors[i]->SetNewLength()
430 SMOOTHED = 0x0000004, // set by _LayerEdge::Smooth()
431 DIFFICULT = 0x0000008, // near concave VERTEX
432 ON_CONCAVE_FACE = 0x0000010,
433 BLOCKED = 0x0000020, // not to inflate any more
434 INTERSECTED = 0x0000040, // close intersection with a face found
435 NORMAL_UPDATED = 0x0000080,
436 UPD_NORMAL_CONV = 0x0000100, // to update normal on boundary of concave FACE
437 MARKED = 0x0000200, // local usage
438 MULTI_NORMAL = 0x0000400, // a normal is invisible by some of surrounding faces
439 NEAR_BOUNDARY = 0x0000800, // is near FACE boundary forcing smooth
440 SMOOTHED_C1 = 0x0001000, // is on _eosC1
441 DISTORTED = 0x0002000, // was bad before smoothing
442 RISKY_SWOL = 0x0004000, // SWOL is parallel to a source FACE
443 SHRUNK = 0x0008000, // target node reached a tgt position while shrink()
444 UNUSED_FLAG = 0x0100000 // to add user flags after
446 bool Is ( int flag ) const { return _flags & flag; }
447 void Set ( int flag ) { _flags |= flag; }
448 void Unset( int flag ) { _flags &= ~flag; }
449 std::string DumpFlags() const; // debug
451 void SetNewLength( double len, _EdgesOnShape& eos, SMESH_MesherHelper& helper );
452 bool SetNewLength2d( Handle(Geom_Surface)& surface,
453 const TopoDS_Face& F,
455 SMESH_MesherHelper& helper );
456 void SetDataByNeighbors( const SMDS_MeshNode* n1,
457 const SMDS_MeshNode* n2,
458 const _EdgesOnShape& eos,
459 SMESH_MesherHelper& helper);
460 void Block( _SolidData& data );
461 void InvalidateStep( size_t curStep, const _EdgesOnShape& eos, bool restoreLength=false );
462 void ChooseSmooFunction(const set< TGeomID >& concaveVertices,
463 const TNode2Edge& n2eMap);
464 void SmoothPos( const vector< double >& segLen, const double tol );
465 int GetSmoothedPos( const double tol );
466 int Smooth(const int step, const bool isConcaveFace, bool findBest);
467 int Smooth(const int step, bool findBest, vector< _LayerEdge* >& toSmooth );
468 int CheckNeiborsOnBoundary(vector< _LayerEdge* >* badNeibors = 0, bool * needSmooth = 0 );
469 void SmoothWoCheck();
470 bool SmoothOnEdge(Handle(ShapeAnalysis_Surface)& surface,
471 const TopoDS_Face& F,
472 SMESH_MesherHelper& helper);
473 void MoveNearConcaVer( const _EdgesOnShape* eov,
474 const _EdgesOnShape* eos,
476 vector< _LayerEdge* > & badSmooEdges);
477 bool FindIntersection( SMESH_ElementSearcher& searcher,
479 const double& epsilon,
481 const SMDS_MeshElement** face = 0);
482 bool SegTriaInter( const gp_Ax1& lastSegment,
487 const double& epsilon) const;
488 bool SegTriaInter( const gp_Ax1& lastSegment,
489 const SMDS_MeshNode* n0,
490 const SMDS_MeshNode* n1,
491 const SMDS_MeshNode* n2,
493 const double& epsilon) const
494 { return SegTriaInter( lastSegment,
495 SMESH_TNodeXYZ( n0 ), SMESH_TNodeXYZ( n1 ), SMESH_TNodeXYZ( n2 ),
498 const gp_XYZ& PrevPos() const { return _pos[ _pos.size() - 2 ]; }
499 gp_XYZ PrevCheckPos( _EdgesOnShape* eos=0 ) const;
500 gp_Ax1 LastSegment(double& segLen, _EdgesOnShape& eos) const;
501 gp_XY LastUV( const TopoDS_Face& F, _EdgesOnShape& eos, int which=-1 ) const;
502 bool IsOnEdge() const { return _2neibors; }
503 gp_XYZ Copy( _LayerEdge& other, _EdgesOnShape& eos, SMESH_MesherHelper& helper );
504 void SetCosin( double cosin );
505 void SetNormal( const gp_XYZ& n ) { _normal = n; }
506 int NbSteps() const { return _pos.size() - 1; } // nb inlation steps
507 bool IsNeiborOnEdge( const _LayerEdge* edge ) const;
508 void SetSmooLen( double len ) { // set _len at which smoothing is needed
509 _cosin = len; // as for _LayerEdge's on FACE _cosin is not used
511 double GetSmooLen() { return _cosin; } // for _LayerEdge's on FACE _cosin is not used
513 gp_XYZ smoothLaplacian();
514 gp_XYZ smoothAngular();
515 gp_XYZ smoothLengthWeighted();
516 gp_XYZ smoothCentroidal();
517 gp_XYZ smoothNefPolygon();
519 enum { FUN_LAPLACIAN, FUN_LENWEIGHTED, FUN_CENTROIDAL, FUN_NEFPOLY, FUN_ANGULAR, FUN_NB };
520 static const int theNbSmooFuns = FUN_NB;
521 static PSmooFun _funs[theNbSmooFuns];
522 static const char* _funNames[theNbSmooFuns+1];
523 int smooFunID( PSmooFun fun=0) const;
525 _LayerEdge::PSmooFun _LayerEdge::_funs[theNbSmooFuns] = { &_LayerEdge::smoothLaplacian,
526 &_LayerEdge::smoothLengthWeighted,
527 &_LayerEdge::smoothCentroidal,
528 &_LayerEdge::smoothNefPolygon,
529 &_LayerEdge::smoothAngular };
530 const char* _LayerEdge::_funNames[theNbSmooFuns+1] = { "Laplacian",
538 bool operator () (const _LayerEdge* e1, const _LayerEdge* e2) const
540 const bool cmpNodes = ( e1 && e2 && e1->_nodes.size() && e2->_nodes.size() );
541 return cmpNodes ? ( e1->_nodes[0]->GetID() < e2->_nodes[0]->GetID()) : ( e1 < e2 );
544 //--------------------------------------------------------------------------------
546 * A 2D half plane used by _LayerEdge::smoothNefPolygon()
550 gp_XY _pos, _dir, _inNorm;
551 bool IsOut( const gp_XY p, const double tol ) const
553 return _inNorm * ( p - _pos ) < -tol;
555 bool FindIntersection( const _halfPlane& hp, gp_XY & intPnt )
557 //const double eps = 1e-10;
558 double D = _dir.Crossed( hp._dir );
559 if ( fabs(D) < std::numeric_limits<double>::min())
561 gp_XY vec21 = _pos - hp._pos;
562 double u = hp._dir.Crossed( vec21 ) / D;
563 intPnt = _pos + _dir * u;
567 //--------------------------------------------------------------------------------
569 * Structure used to smooth a _LayerEdge based on an EDGE.
573 double _wgt [2]; // weights of _nodes
574 _LayerEdge* _edges[2];
576 // normal to plane passing through _LayerEdge._normal and tangent of EDGE
579 _2NearEdges() { _edges[0]=_edges[1]=0; _plnNorm = 0; }
580 const SMDS_MeshNode* tgtNode(bool is2nd) {
581 return _edges[is2nd] ? _edges[is2nd]->_nodes.back() : 0;
583 const SMDS_MeshNode* srcNode(bool is2nd) {
584 return _edges[is2nd] ? _edges[is2nd]->_nodes[0] : 0;
587 std::swap( _wgt [0], _wgt [1] );
588 std::swap( _edges[0], _edges[1] );
590 void set( _LayerEdge* e1, _LayerEdge* e2, double w1, double w2 ) {
591 _edges[0] = e1; _edges[1] = e2; _wgt[0] = w1; _wgt[1] = w2;
593 bool include( const _LayerEdge* e ) {
594 return ( _edges[0] == e || _edges[1] == e );
599 //--------------------------------------------------------------------------------
601 * \brief Layers parameters got by averaging several hypotheses
605 AverageHyp( const StdMeshers_ViscousLayers* hyp = 0 )
606 :_nbLayers(0), _nbHyps(0), _method(0), _thickness(0), _stretchFactor(0)
610 void Add( const StdMeshers_ViscousLayers* hyp )
615 _nbLayers = hyp->GetNumberLayers();
616 //_thickness += hyp->GetTotalThickness();
617 _thickness = Max( _thickness, hyp->GetTotalThickness() );
618 _stretchFactor += hyp->GetStretchFactor();
619 _method = hyp->GetMethod();
622 double GetTotalThickness() const { return _thickness; /*_nbHyps ? _thickness / _nbHyps : 0;*/ }
623 double GetStretchFactor() const { return _nbHyps ? _stretchFactor / _nbHyps : 0; }
624 int GetNumberLayers() const { return _nbLayers; }
625 int GetMethod() const { return _method; }
627 bool UseSurfaceNormal() const
628 { return _method == StdMeshers_ViscousLayers::SURF_OFFSET_SMOOTH; }
629 bool ToSmooth() const
630 { return _method == StdMeshers_ViscousLayers::SURF_OFFSET_SMOOTH; }
631 bool IsOffsetMethod() const
632 { return _method == StdMeshers_ViscousLayers::FACE_OFFSET; }
635 int _nbLayers, _nbHyps, _method;
636 double _thickness, _stretchFactor;
639 //--------------------------------------------------------------------------------
641 * \brief _LayerEdge's on a shape and other shape data
645 vector< _LayerEdge* > _edges;
649 SMESH_subMesh * _subMesh;
650 // face or edge w/o layer along or near which _edges are inflated
652 bool _isRegularSWOL; // w/o singularities
653 // averaged StdMeshers_ViscousLayers parameters
656 _Smoother1D* _edgeSmoother;
657 vector< _EdgesOnShape* > _eosConcaVer; // edges at concave VERTEXes of a FACE
658 vector< _EdgesOnShape* > _eosC1; // to smooth together several C1 continues shapes
660 vector< gp_XYZ > _faceNormals; // if _shape is FACE
661 vector< _EdgesOnShape* > _faceEOS; // to get _faceNormals of adjacent FACEs
663 Handle(ShapeAnalysis_Surface) _offsetSurf;
664 _LayerEdge* _edgeForOffset;
666 _SolidData* _data; // parent SOLID
668 _LayerEdge* operator[](size_t i) const { return (_LayerEdge*) _edges[i]; }
669 size_t size() const { return _edges.size(); }
670 TopAbs_ShapeEnum ShapeType() const
671 { return _shape.IsNull() ? TopAbs_SHAPE : _shape.ShapeType(); }
672 TopAbs_ShapeEnum SWOLType() const
673 { return _sWOL.IsNull() ? TopAbs_SHAPE : _sWOL.ShapeType(); }
674 bool HasC1( const _EdgesOnShape* other ) const
675 { return std::find( _eosC1.begin(), _eosC1.end(), other ) != _eosC1.end(); }
676 bool GetNormal( const SMDS_MeshElement* face, gp_Vec& norm );
677 _SolidData& GetData() const { return *_data; }
679 _EdgesOnShape(): _shapeID(-1), _subMesh(0), _toSmooth(false), _edgeSmoother(0) {}
682 //--------------------------------------------------------------------------------
684 * \brief Convex FACE whose radius of curvature is less than the thickness of
685 * layers. It is used to detect distortion of prisms based on a convex
686 * FACE and to update normals to enable further increasing the thickness
692 // edges whose _simplices are used to detect prism distortion
693 vector< _LayerEdge* > _simplexTestEdges;
695 // map a sub-shape to _SolidData::_edgesOnShape
696 map< TGeomID, _EdgesOnShape* > _subIdToEOS;
700 bool _normalsFixedOnBorders; // used in putOnOffsetSurface()
702 double GetMaxCurvature( _SolidData& data,
704 BRepLProp_SLProps& surfProp,
705 SMESH_MesherHelper& helper);
707 bool GetCenterOfCurvature( _LayerEdge* ledge,
708 BRepLProp_SLProps& surfProp,
709 SMESH_MesherHelper& helper,
710 gp_Pnt & center ) const;
711 bool CheckPrisms() const;
714 //--------------------------------------------------------------------------------
716 * \brief Structure holding _LayerEdge's based on EDGEs that will collide
717 * at inflation up to the full thickness. A detected collision
718 * is fixed in updateNormals()
720 struct _CollisionEdges
723 vector< _LayerEdge* > _intEdges; // each pair forms an intersected quadrangle
724 const SMDS_MeshNode* nSrc(int i) const { return _intEdges[i]->_nodes[0]; }
725 const SMDS_MeshNode* nTgt(int i) const { return _intEdges[i]->_nodes.back(); }
728 //--------------------------------------------------------------------------------
730 * \brief Data of a SOLID
734 typedef const StdMeshers_ViscousLayers* THyp;
736 TopTools_MapOfShape _before; // SOLIDs to be computed before _solid
737 TGeomID _index; // SOLID id
738 _MeshOfSolid* _proxyMesh;
740 list< TopoDS_Shape > _hypShapes;
741 map< TGeomID, THyp > _face2hyp; // filled if _hyps.size() > 1
742 set< TGeomID > _reversedFaceIds;
743 set< TGeomID > _ignoreFaceIds; // WOL FACEs and FACEs of other SOLIDs
745 double _stepSize, _stepSizeCoeff, _geomSize;
746 const SMDS_MeshNode* _stepSizeNodes[2];
748 TNode2Edge _n2eMap; // nodes and _LayerEdge's based on them
750 // map to find _n2eMap of another _SolidData by a shrink shape shared by two _SolidData's
751 map< TGeomID, TNode2Edge* > _s2neMap;
752 // _LayerEdge's with underlying shapes
753 vector< _EdgesOnShape > _edgesOnShape;
755 // key: an id of shape (EDGE or VERTEX) shared by a FACE with
756 // layers and a FACE w/o layers
757 // value: the shape (FACE or EDGE) to shrink mesh on.
758 // _LayerEdge's basing on nodes on key shape are inflated along the value shape
759 map< TGeomID, TopoDS_Shape > _shrinkShape2Shape;
761 // Convex FACEs whose radius of curvature is less than the thickness of layers
762 map< TGeomID, _ConvexFace > _convexFaces;
764 // shapes (EDGEs and VERTEXes) srink from which is forbidden due to collisions with
765 // the adjacent SOLID
766 set< TGeomID > _noShrinkShapes;
768 int _nbShapesToSmooth;
770 vector< _CollisionEdges > _collisionEdges;
771 set< TGeomID > _concaveFaces;
773 double _maxThickness; // of all _hyps
774 double _minThickness; // of all _hyps
776 double _epsilon; // precision for SegTriaInter()
778 SMESH_MesherHelper* _helper;
780 _SolidData(const TopoDS_Shape& s=TopoDS_Shape(),
782 :_solid(s), _proxyMesh(m), _helper(0) {}
785 void SortOnEdge( const TopoDS_Edge& E, vector< _LayerEdge* >& edges);
786 void Sort2NeiborsOnEdge( vector< _LayerEdge* >& edges );
788 _ConvexFace* GetConvexFace( const TGeomID faceID ) {
789 map< TGeomID, _ConvexFace >::iterator id2face = _convexFaces.find( faceID );
790 return id2face == _convexFaces.end() ? 0 : & id2face->second;
792 _EdgesOnShape* GetShapeEdges(const TGeomID shapeID );
793 _EdgesOnShape* GetShapeEdges(const TopoDS_Shape& shape );
794 _EdgesOnShape* GetShapeEdges(const _LayerEdge* edge )
795 { return GetShapeEdges( edge->_nodes[0]->getshapeId() ); }
797 SMESH_MesherHelper& GetHelper() const { return *_helper; }
799 void UnmarkEdges( int flag = _LayerEdge::MARKED ) {
800 for ( size_t i = 0; i < _edgesOnShape.size(); ++i )
801 for ( size_t j = 0; j < _edgesOnShape[i]._edges.size(); ++j )
802 _edgesOnShape[i]._edges[j]->Unset( flag );
804 void AddShapesToSmooth( const set< _EdgesOnShape* >& shape,
805 const set< _EdgesOnShape* >* edgesNoAnaSmooth=0 );
807 void PrepareEdgesToSmoothOnFace( _EdgesOnShape* eof, bool substituteSrcNodes );
809 //--------------------------------------------------------------------------------
811 * \brief Offset plane used in getNormalByOffset()
817 int _faceIndexNext[2];
818 gp_Lin _lines[2]; // line of intersection with neighbor _OffsetPlane's
821 _isLineOK[0] = _isLineOK[1] = false; _faceIndexNext[0] = _faceIndexNext[1] = -1;
823 void ComputeIntersectionLine( _OffsetPlane& pln,
824 const TopoDS_Edge& E,
825 const TopoDS_Vertex& V );
826 gp_XYZ GetCommonPoint(bool& isFound, const TopoDS_Vertex& V) const;
827 int NbLines() const { return _isLineOK[0] + _isLineOK[1]; }
829 //--------------------------------------------------------------------------------
831 * \brief Container of centers of curvature at nodes on an EDGE bounding _ConvexFace
833 struct _CentralCurveOnEdge
836 vector< gp_Pnt > _curvaCenters;
837 vector< _LayerEdge* > _ledges;
838 vector< gp_XYZ > _normals; // new normal for each of _ledges
839 vector< double > _segLength2;
842 TopoDS_Face _adjFace;
843 bool _adjFaceToSmooth;
845 void Append( const gp_Pnt& center, _LayerEdge* ledge )
847 if ( _curvaCenters.size() > 0 )
848 _segLength2.push_back( center.SquareDistance( _curvaCenters.back() ));
849 _curvaCenters.push_back( center );
850 _ledges.push_back( ledge );
851 _normals.push_back( ledge->_normal );
853 bool FindNewNormal( const gp_Pnt& center, gp_XYZ& newNormal );
854 void SetShapes( const TopoDS_Edge& edge,
855 const _ConvexFace& convFace,
857 SMESH_MesherHelper& helper);
859 //--------------------------------------------------------------------------------
861 * \brief Data of node on a shrinked FACE
865 const SMDS_MeshNode* _node;
866 vector<_Simplex> _simplices; // for quality check
868 enum SmoothType { LAPLACIAN, CENTROIDAL, ANGULAR, TFI };
870 bool Smooth(int& badNb,
871 Handle(Geom_Surface)& surface,
872 SMESH_MesherHelper& helper,
873 const double refSign,
877 gp_XY computeAngularPos(vector<gp_XY>& uv,
878 const gp_XY& uvToFix,
879 const double refSign );
882 //--------------------------------------------------------------------------------
884 * \brief Builder of viscous layers
886 class _ViscousBuilder
891 SMESH_ComputeErrorPtr Compute(SMESH_Mesh& mesh,
892 const TopoDS_Shape& shape);
893 // check validity of hypotheses
894 SMESH_ComputeErrorPtr CheckHypotheses( SMESH_Mesh& mesh,
895 const TopoDS_Shape& shape );
897 // restore event listeners used to clear an inferior dim sub-mesh modified by viscous layers
898 void RestoreListeners();
900 // computes SMESH_ProxyMesh::SubMesh::_n2n;
901 bool MakeN2NMap( _MeshOfSolid* pm );
905 bool findSolidsWithLayers();
906 bool setBefore( _SolidData& solidBefore, _SolidData& solidAfter );
907 bool findFacesWithLayers(const bool onlyWith=false);
908 void getIgnoreFaces(const TopoDS_Shape& solid,
909 const StdMeshers_ViscousLayers* hyp,
910 const TopoDS_Shape& hypShape,
911 set<TGeomID>& ignoreFaces);
912 bool makeLayer(_SolidData& data);
913 void setShapeData( _EdgesOnShape& eos, SMESH_subMesh* sm, _SolidData& data );
914 bool setEdgeData( _LayerEdge& edge, _EdgesOnShape& eos,
915 SMESH_MesherHelper& helper, _SolidData& data);
916 gp_XYZ getFaceNormal(const SMDS_MeshNode* n,
917 const TopoDS_Face& face,
918 SMESH_MesherHelper& helper,
920 bool shiftInside=false);
921 bool getFaceNormalAtSingularity(const gp_XY& uv,
922 const TopoDS_Face& face,
923 SMESH_MesherHelper& helper,
925 gp_XYZ getWeigthedNormal( const _LayerEdge* edge );
926 gp_XYZ getNormalByOffset( _LayerEdge* edge,
927 std::pair< TopoDS_Face, gp_XYZ > fId2Normal[],
929 bool lastNoOffset = false);
930 bool findNeiborsOnEdge(const _LayerEdge* edge,
931 const SMDS_MeshNode*& n1,
932 const SMDS_MeshNode*& n2,
935 void findSimplexTestEdges( _SolidData& data,
936 vector< vector<_LayerEdge*> >& edgesByGeom);
937 void computeGeomSize( _SolidData& data );
938 bool findShapesToSmooth( _SolidData& data);
939 void limitStepSizeByCurvature( _SolidData& data );
940 void limitStepSize( _SolidData& data,
941 const SMDS_MeshElement* face,
942 const _LayerEdge* maxCosinEdge );
943 void limitStepSize( _SolidData& data, const double minSize);
944 bool inflate(_SolidData& data);
945 bool smoothAndCheck(_SolidData& data, const int nbSteps, double & distToIntersection);
946 int invalidateBadSmooth( _SolidData& data,
947 SMESH_MesherHelper& helper,
948 vector< _LayerEdge* >& badSmooEdges,
949 vector< _EdgesOnShape* >& eosC1,
951 void makeOffsetSurface( _EdgesOnShape& eos, SMESH_MesherHelper& );
952 void putOnOffsetSurface( _EdgesOnShape& eos, int infStep,
953 vector< _EdgesOnShape* >& eosC1,
954 int smooStep=0, int moveAll=false );
955 void findCollisionEdges( _SolidData& data, SMESH_MesherHelper& helper );
956 void findEdgesToUpdateNormalNearConvexFace( _ConvexFace & convFace,
958 SMESH_MesherHelper& helper );
959 void limitMaxLenByCurvature( _SolidData& data, SMESH_MesherHelper& helper );
960 void limitMaxLenByCurvature( _LayerEdge* e1, _LayerEdge* e2,
961 _EdgesOnShape& eos1, _EdgesOnShape& eos2,
962 SMESH_MesherHelper& helper );
963 bool updateNormals( _SolidData& data, SMESH_MesherHelper& helper, int stepNb, double stepSize );
964 bool updateNormalsOfConvexFaces( _SolidData& data,
965 SMESH_MesherHelper& helper,
967 void updateNormalsOfC1Vertices( _SolidData& data );
968 bool updateNormalsOfSmoothed( _SolidData& data,
969 SMESH_MesherHelper& helper,
971 const double stepSize );
972 bool isNewNormalOk( _SolidData& data,
974 const gp_XYZ& newNormal);
975 bool refine(_SolidData& data);
976 bool shrink(_SolidData& data);
977 bool prepareEdgeToShrink( _LayerEdge& edge, _EdgesOnShape& eos,
978 SMESH_MesherHelper& helper,
979 const SMESHDS_SubMesh* faceSubMesh );
980 void restoreNoShrink( _LayerEdge& edge ) const;
981 void fixBadFaces(const TopoDS_Face& F,
982 SMESH_MesherHelper& helper,
985 set<const SMDS_MeshNode*> * involvedNodes=NULL);
986 bool addBoundaryElements(_SolidData& data);
988 bool error( const string& text, int solidID=-1 );
989 SMESHDS_Mesh* getMeshDS() const { return _mesh->GetMeshDS(); }
992 void makeGroupOfLE();
995 SMESH_ComputeErrorPtr _error;
997 vector< _SolidData > _sdVec;
998 TopTools_IndexedMapOfShape _solids; // to find _SolidData by a solid
999 TopTools_MapOfShape _shrinkedFaces;
1004 //--------------------------------------------------------------------------------
1006 * \brief Shrinker of nodes on the EDGE
1010 TopoDS_Edge _geomEdge;
1011 vector<double> _initU;
1012 vector<double> _normPar;
1013 vector<const SMDS_MeshNode*> _nodes;
1014 const _LayerEdge* _edges[2];
1017 void AddEdge( const _LayerEdge* e, _EdgesOnShape& eos, SMESH_MesherHelper& helper );
1018 void Compute(bool set3D, SMESH_MesherHelper& helper);
1019 void RestoreParams();
1020 void SwapSrcTgtNodes(SMESHDS_Mesh* mesh);
1021 const TopoDS_Edge& GeomEdge() const { return _geomEdge; }
1022 const SMDS_MeshNode* TgtNode( bool is2nd ) const
1023 { return _edges[is2nd] ? _edges[is2nd]->_nodes.back() : 0; }
1024 const SMDS_MeshNode* SrcNode( bool is2nd ) const
1025 { return _edges[is2nd] ? _edges[is2nd]->_nodes[0] : 0; }
1027 //--------------------------------------------------------------------------------
1029 * \brief Smoother of _LayerEdge's on EDGE.
1033 struct OffPnt // point of the offsetted EDGE
1035 gp_XYZ _xyz; // coord of a point inflated from EDGE w/o smooth
1036 double _len; // length reached at previous inflation step
1037 double _param; // on EDGE
1038 _2NearEdges _2edges; // 2 neighbor _LayerEdge's
1039 gp_XYZ _edgeDir;// EDGE tangent at _param
1040 double Distance( const OffPnt& p ) const { return ( _xyz - p._xyz ).Modulus(); }
1042 vector< OffPnt > _offPoints;
1043 vector< double > _leParams; // normalized param of _eos._edges on EDGE
1044 Handle(Geom_Curve) _anaCurve; // for analytic smooth
1045 _LayerEdge _leOnV[2]; // _LayerEdge's holding normal to the EDGE at VERTEXes
1046 gp_XYZ _edgeDir[2]; // tangent at VERTEXes
1047 size_t _iSeg[2]; // index of segment where extreme tgt node is projected
1048 _EdgesOnShape& _eos;
1049 double _curveLen; // length of the EDGE
1050 std::pair<int,int> _eToSmooth[2]; // <from,to> indices of _LayerEdge's in _eos
1052 static Handle(Geom_Curve) CurveForSmooth( const TopoDS_Edge& E,
1054 SMESH_MesherHelper& helper);
1056 _Smoother1D( Handle(Geom_Curve) curveForSmooth,
1057 _EdgesOnShape& eos )
1058 : _anaCurve( curveForSmooth ), _eos( eos )
1061 bool Perform(_SolidData& data,
1062 Handle(ShapeAnalysis_Surface)& surface,
1063 const TopoDS_Face& F,
1064 SMESH_MesherHelper& helper );
1066 void prepare(_SolidData& data );
1068 void findEdgesToSmooth();
1070 bool isToSmooth( int iE );
1072 bool smoothAnalyticEdge( _SolidData& data,
1073 Handle(ShapeAnalysis_Surface)& surface,
1074 const TopoDS_Face& F,
1075 SMESH_MesherHelper& helper);
1076 bool smoothComplexEdge( _SolidData& data,
1077 Handle(ShapeAnalysis_Surface)& surface,
1078 const TopoDS_Face& F,
1079 SMESH_MesherHelper& helper);
1080 gp_XYZ getNormalNormal( const gp_XYZ & normal,
1081 const gp_XYZ& edgeDir);
1082 _LayerEdge* getLEdgeOnV( bool is2nd )
1084 return _eos._edges[ is2nd ? _eos._edges.size()-1 : 0 ]->_2neibors->_edges[ is2nd ];
1086 bool isAnalytic() const { return !_anaCurve.IsNull(); }
1088 //--------------------------------------------------------------------------------
1090 * \brief Class of temporary mesh face.
1091 * We can't use SMDS_FaceOfNodes since it's impossible to set it's ID which is
1092 * needed because SMESH_ElementSearcher internaly uses set of elements sorted by ID
1094 struct _TmpMeshFace : public SMDS_MeshElement
1096 vector<const SMDS_MeshNode* > _nn;
1097 _TmpMeshFace( const vector<const SMDS_MeshNode*>& nodes,
1098 int id, int faceID=-1, int idInFace=-1):
1099 SMDS_MeshElement(id), _nn(nodes) { setShapeId(faceID); setIdInShape(idInFace); }
1100 virtual const SMDS_MeshNode* GetNode(const int ind) const { return _nn[ind]; }
1101 virtual SMDSAbs_ElementType GetType() const { return SMDSAbs_Face; }
1102 virtual vtkIdType GetVtkType() const { return -1; }
1103 virtual SMDSAbs_EntityType GetEntityType() const { return SMDSEntity_Last; }
1104 virtual SMDSAbs_GeometryType GetGeomType() const
1105 { return _nn.size() == 3 ? SMDSGeom_TRIANGLE : SMDSGeom_QUADRANGLE; }
1106 virtual SMDS_ElemIteratorPtr elementsIterator(SMDSAbs_ElementType) const
1107 { return SMDS_ElemIteratorPtr( new SMDS_NodeVectorElemIterator( _nn.begin(), _nn.end()));}
1109 //--------------------------------------------------------------------------------
1111 * \brief Class of temporary mesh face storing _LayerEdge it's based on
1113 struct _TmpMeshFaceOnEdge : public _TmpMeshFace
1115 _LayerEdge *_le1, *_le2;
1116 _TmpMeshFaceOnEdge( _LayerEdge* le1, _LayerEdge* le2, int ID ):
1117 _TmpMeshFace( vector<const SMDS_MeshNode*>(4), ID ), _le1(le1), _le2(le2)
1119 _nn[0]=_le1->_nodes[0];
1120 _nn[1]=_le1->_nodes.back();
1121 _nn[2]=_le2->_nodes.back();
1122 _nn[3]=_le2->_nodes[0];
1124 gp_XYZ GetDir() const // return average direction of _LayerEdge's, normal to EDGE
1126 SMESH_TNodeXYZ p0s( _nn[0] );
1127 SMESH_TNodeXYZ p0t( _nn[1] );
1128 SMESH_TNodeXYZ p1t( _nn[2] );
1129 SMESH_TNodeXYZ p1s( _nn[3] );
1130 gp_XYZ v0 = p0t - p0s;
1131 gp_XYZ v1 = p1t - p1s;
1132 gp_XYZ v01 = p1s - p0s;
1133 gp_XYZ n = ( v0 ^ v01 ) + ( v1 ^ v01 );
1138 gp_XYZ GetDir(_LayerEdge* le1, _LayerEdge* le2) // return average direction of _LayerEdge's
1140 _nn[0]=le1->_nodes[0];
1141 _nn[1]=le1->_nodes.back();
1142 _nn[2]=le2->_nodes.back();
1143 _nn[3]=le2->_nodes[0];
1147 //--------------------------------------------------------------------------------
1149 * \brief Retriever of node coordinates either directly or from a surface by node UV.
1150 * \warning Location of a surface is ignored
1152 struct _NodeCoordHelper
1154 SMESH_MesherHelper& _helper;
1155 const TopoDS_Face& _face;
1156 Handle(Geom_Surface) _surface;
1157 gp_XYZ (_NodeCoordHelper::* _fun)(const SMDS_MeshNode* n) const;
1159 _NodeCoordHelper(const TopoDS_Face& F, SMESH_MesherHelper& helper, bool is2D)
1160 : _helper( helper ), _face( F )
1164 TopLoc_Location loc;
1165 _surface = BRep_Tool::Surface( _face, loc );
1167 if ( _surface.IsNull() )
1168 _fun = & _NodeCoordHelper::direct;
1170 _fun = & _NodeCoordHelper::byUV;
1172 gp_XYZ operator()(const SMDS_MeshNode* n) const { return (this->*_fun)( n ); }
1175 gp_XYZ direct(const SMDS_MeshNode* n) const
1177 return SMESH_TNodeXYZ( n );
1179 gp_XYZ byUV (const SMDS_MeshNode* n) const
1181 gp_XY uv = _helper.GetNodeUV( _face, n );
1182 return _surface->Value( uv.X(), uv.Y() ).XYZ();
1186 //================================================================================
1188 * \brief Check angle between vectors
1190 //================================================================================
1192 inline bool isLessAngle( const gp_Vec& v1, const gp_Vec& v2, const double cos )
1194 double dot = v1 * v2; // cos * |v1| * |v2|
1195 double l1 = v1.SquareMagnitude();
1196 double l2 = v2.SquareMagnitude();
1197 return (( dot * cos >= 0 ) &&
1198 ( dot * dot ) / l1 / l2 >= ( cos * cos ));
1201 } // namespace VISCOUS_3D
1205 //================================================================================
1206 // StdMeshers_ViscousLayers hypothesis
1208 StdMeshers_ViscousLayers::StdMeshers_ViscousLayers(int hypId, int studyId, SMESH_Gen* gen)
1209 :SMESH_Hypothesis(hypId, studyId, gen),
1210 _isToIgnoreShapes(1), _nbLayers(1), _thickness(1), _stretchFactor(1),
1211 _method( SURF_OFFSET_SMOOTH )
1213 _name = StdMeshers_ViscousLayers::GetHypType();
1214 _param_algo_dim = -3; // auxiliary hyp used by 3D algos
1215 } // --------------------------------------------------------------------------------
1216 void StdMeshers_ViscousLayers::SetBndShapes(const std::vector<int>& faceIds, bool toIgnore)
1218 if ( faceIds != _shapeIds )
1219 _shapeIds = faceIds, NotifySubMeshesHypothesisModification();
1220 if ( _isToIgnoreShapes != toIgnore )
1221 _isToIgnoreShapes = toIgnore, NotifySubMeshesHypothesisModification();
1222 } // --------------------------------------------------------------------------------
1223 void StdMeshers_ViscousLayers::SetTotalThickness(double thickness)
1225 if ( thickness != _thickness )
1226 _thickness = thickness, NotifySubMeshesHypothesisModification();
1227 } // --------------------------------------------------------------------------------
1228 void StdMeshers_ViscousLayers::SetNumberLayers(int nb)
1230 if ( _nbLayers != nb )
1231 _nbLayers = nb, NotifySubMeshesHypothesisModification();
1232 } // --------------------------------------------------------------------------------
1233 void StdMeshers_ViscousLayers::SetStretchFactor(double factor)
1235 if ( _stretchFactor != factor )
1236 _stretchFactor = factor, NotifySubMeshesHypothesisModification();
1237 } // --------------------------------------------------------------------------------
1238 void StdMeshers_ViscousLayers::SetMethod( ExtrusionMethod method )
1240 if ( _method != method )
1241 _method = method, NotifySubMeshesHypothesisModification();
1242 } // --------------------------------------------------------------------------------
1243 SMESH_ProxyMesh::Ptr
1244 StdMeshers_ViscousLayers::Compute(SMESH_Mesh& theMesh,
1245 const TopoDS_Shape& theShape,
1246 const bool toMakeN2NMap) const
1248 using namespace VISCOUS_3D;
1249 _ViscousBuilder builder;
1250 SMESH_ComputeErrorPtr err = builder.Compute( theMesh, theShape );
1251 if ( err && !err->IsOK() )
1252 return SMESH_ProxyMesh::Ptr();
1254 vector<SMESH_ProxyMesh::Ptr> components;
1255 TopExp_Explorer exp( theShape, TopAbs_SOLID );
1256 for ( ; exp.More(); exp.Next() )
1258 if ( _MeshOfSolid* pm =
1259 _ViscousListener::GetSolidMesh( &theMesh, exp.Current(), /*toCreate=*/false))
1261 if ( toMakeN2NMap && !pm->_n2nMapComputed )
1262 if ( !builder.MakeN2NMap( pm ))
1263 return SMESH_ProxyMesh::Ptr();
1264 components.push_back( SMESH_ProxyMesh::Ptr( pm ));
1265 pm->myIsDeletable = false; // it will de deleted by boost::shared_ptr
1267 if ( pm->_warning && !pm->_warning->IsOK() )
1269 SMESH_subMesh* sm = theMesh.GetSubMesh( exp.Current() );
1270 SMESH_ComputeErrorPtr& smError = sm->GetComputeError();
1271 if ( !smError || smError->IsOK() )
1272 smError = pm->_warning;
1275 _ViscousListener::RemoveSolidMesh ( &theMesh, exp.Current() );
1277 switch ( components.size() )
1281 case 1: return components[0];
1283 default: return SMESH_ProxyMesh::Ptr( new SMESH_ProxyMesh( components ));
1285 return SMESH_ProxyMesh::Ptr();
1286 } // --------------------------------------------------------------------------------
1287 std::ostream & StdMeshers_ViscousLayers::SaveTo(std::ostream & save)
1289 save << " " << _nbLayers
1290 << " " << _thickness
1291 << " " << _stretchFactor
1292 << " " << _shapeIds.size();
1293 for ( size_t i = 0; i < _shapeIds.size(); ++i )
1294 save << " " << _shapeIds[i];
1295 save << " " << !_isToIgnoreShapes; // negate to keep the behavior in old studies.
1296 save << " " << _method;
1298 } // --------------------------------------------------------------------------------
1299 std::istream & StdMeshers_ViscousLayers::LoadFrom(std::istream & load)
1301 int nbFaces, faceID, shapeToTreat, method;
1302 load >> _nbLayers >> _thickness >> _stretchFactor >> nbFaces;
1303 while ( (int) _shapeIds.size() < nbFaces && load >> faceID )
1304 _shapeIds.push_back( faceID );
1305 if ( load >> shapeToTreat ) {
1306 _isToIgnoreShapes = !shapeToTreat;
1307 if ( load >> method )
1308 _method = (ExtrusionMethod) method;
1311 _isToIgnoreShapes = true; // old behavior
1314 } // --------------------------------------------------------------------------------
1315 bool StdMeshers_ViscousLayers::SetParametersByMesh(const SMESH_Mesh* theMesh,
1316 const TopoDS_Shape& theShape)
1320 } // --------------------------------------------------------------------------------
1321 SMESH_ComputeErrorPtr
1322 StdMeshers_ViscousLayers::CheckHypothesis(SMESH_Mesh& theMesh,
1323 const TopoDS_Shape& theShape,
1324 SMESH_Hypothesis::Hypothesis_Status& theStatus)
1326 VISCOUS_3D::_ViscousBuilder builder;
1327 SMESH_ComputeErrorPtr err = builder.CheckHypotheses( theMesh, theShape );
1328 if ( err && !err->IsOK() )
1329 theStatus = SMESH_Hypothesis::HYP_INCOMPAT_HYPS;
1331 theStatus = SMESH_Hypothesis::HYP_OK;
1335 // --------------------------------------------------------------------------------
1336 bool StdMeshers_ViscousLayers::IsShapeWithLayers(int shapeIndex) const
1339 ( std::find( _shapeIds.begin(), _shapeIds.end(), shapeIndex ) != _shapeIds.end() );
1340 return IsToIgnoreShapes() ? !isIn : isIn;
1342 // END StdMeshers_ViscousLayers hypothesis
1343 //================================================================================
1345 namespace VISCOUS_3D
1347 gp_XYZ getEdgeDir( const TopoDS_Edge& E, const TopoDS_Vertex& fromV )
1351 Handle(Geom_Curve) c = BRep_Tool::Curve( E, f, l );
1352 if ( c.IsNull() ) return gp_XYZ( Precision::Infinite(), 1e100, 1e100 );
1353 gp_Pnt p = BRep_Tool::Pnt( fromV );
1354 double distF = p.SquareDistance( c->Value( f ));
1355 double distL = p.SquareDistance( c->Value( l ));
1356 c->D1(( distF < distL ? f : l), p, dir );
1357 if ( distL < distF ) dir.Reverse();
1360 //--------------------------------------------------------------------------------
1361 gp_XYZ getEdgeDir( const TopoDS_Edge& E, const SMDS_MeshNode* atNode,
1362 SMESH_MesherHelper& helper)
1365 double f,l; gp_Pnt p;
1366 Handle(Geom_Curve) c = BRep_Tool::Curve( E, f, l );
1367 if ( c.IsNull() ) return gp_XYZ( Precision::Infinite(), 1e100, 1e100 );
1368 double u = helper.GetNodeU( E, atNode );
1372 //--------------------------------------------------------------------------------
1373 gp_XYZ getFaceDir( const TopoDS_Face& F, const TopoDS_Vertex& fromV,
1374 const SMDS_MeshNode* node, SMESH_MesherHelper& helper, bool& ok,
1376 //--------------------------------------------------------------------------------
1377 gp_XYZ getFaceDir( const TopoDS_Face& F, const TopoDS_Edge& fromE,
1378 const SMDS_MeshNode* node, SMESH_MesherHelper& helper, bool& ok)
1381 Handle(Geom_Curve) c = BRep_Tool::Curve( fromE, f, l );
1384 TopoDS_Vertex v = helper.IthVertex( 0, fromE );
1385 return getFaceDir( F, v, node, helper, ok );
1387 gp_XY uv = helper.GetNodeUV( F, node, 0, &ok );
1388 Handle(Geom_Surface) surface = BRep_Tool::Surface( F );
1389 gp_Pnt p; gp_Vec du, dv, norm;
1390 surface->D1( uv.X(),uv.Y(), p, du,dv );
1393 double u = helper.GetNodeU( fromE, node, 0, &ok );
1395 TopAbs_Orientation o = helper.GetSubShapeOri( F.Oriented(TopAbs_FORWARD), fromE);
1396 if ( o == TopAbs_REVERSED )
1399 gp_Vec dir = norm ^ du;
1401 if ( node->GetPosition()->GetTypeOfPosition() == SMDS_TOP_VERTEX &&
1402 helper.IsClosedEdge( fromE ))
1404 if ( fabs(u-f) < fabs(u-l)) c->D1( l, p, dv );
1405 else c->D1( f, p, dv );
1406 if ( o == TopAbs_REVERSED )
1408 gp_Vec dir2 = norm ^ dv;
1409 dir = dir.Normalized() + dir2.Normalized();
1413 //--------------------------------------------------------------------------------
1414 gp_XYZ getFaceDir( const TopoDS_Face& F, const TopoDS_Vertex& fromV,
1415 const SMDS_MeshNode* node, SMESH_MesherHelper& helper,
1416 bool& ok, double* cosin)
1418 TopoDS_Face faceFrw = F;
1419 faceFrw.Orientation( TopAbs_FORWARD );
1420 //double f,l; TopLoc_Location loc;
1421 TopoDS_Edge edges[2]; // sharing a vertex
1424 TopoDS_Vertex VV[2];
1425 TopExp_Explorer exp( faceFrw, TopAbs_EDGE );
1426 for ( ; exp.More() && nbEdges < 2; exp.Next() )
1428 const TopoDS_Edge& e = TopoDS::Edge( exp.Current() );
1429 if ( SMESH_Algo::isDegenerated( e )) continue;
1430 TopExp::Vertices( e, VV[0], VV[1], /*CumOri=*/true );
1431 if ( VV[1].IsSame( fromV )) {
1432 nbEdges += edges[ 0 ].IsNull();
1435 else if ( VV[0].IsSame( fromV )) {
1436 nbEdges += edges[ 1 ].IsNull();
1441 gp_XYZ dir(0,0,0), edgeDir[2];
1444 // get dirs of edges going fromV
1446 for ( size_t i = 0; i < nbEdges && ok; ++i )
1448 edgeDir[i] = getEdgeDir( edges[i], fromV );
1449 double size2 = edgeDir[i].SquareModulus();
1450 if (( ok = size2 > numeric_limits<double>::min() ))
1451 edgeDir[i] /= sqrt( size2 );
1453 if ( !ok ) return dir;
1455 // get angle between the 2 edges
1457 double angle = helper.GetAngle( edges[0], edges[1], faceFrw, fromV, &faceNormal );
1458 if ( Abs( angle ) < 5 * M_PI/180 )
1460 dir = ( faceNormal.XYZ() ^ edgeDir[0].Reversed()) + ( faceNormal.XYZ() ^ edgeDir[1] );
1464 dir = edgeDir[0] + edgeDir[1];
1469 double angle = gp_Vec( edgeDir[0] ).Angle( dir );
1470 *cosin = Cos( angle );
1473 else if ( nbEdges == 1 )
1475 dir = getFaceDir( faceFrw, edges[ edges[0].IsNull() ], node, helper, ok );
1476 if ( cosin ) *cosin = 1.;
1486 //================================================================================
1488 * \brief Finds concave VERTEXes of a FACE
1490 //================================================================================
1492 bool getConcaveVertices( const TopoDS_Face& F,
1493 SMESH_MesherHelper& helper,
1494 set< TGeomID >* vertices = 0)
1496 // check angles at VERTEXes
1498 TSideVector wires = StdMeshers_FaceSide::GetFaceWires( F, *helper.GetMesh(), 0, error );
1499 for ( size_t iW = 0; iW < wires.size(); ++iW )
1501 const int nbEdges = wires[iW]->NbEdges();
1502 if ( nbEdges < 2 && SMESH_Algo::isDegenerated( wires[iW]->Edge(0)))
1504 for ( int iE1 = 0; iE1 < nbEdges; ++iE1 )
1506 if ( SMESH_Algo::isDegenerated( wires[iW]->Edge( iE1 ))) continue;
1507 int iE2 = ( iE1 + 1 ) % nbEdges;
1508 while ( SMESH_Algo::isDegenerated( wires[iW]->Edge( iE2 )))
1509 iE2 = ( iE2 + 1 ) % nbEdges;
1510 TopoDS_Vertex V = wires[iW]->FirstVertex( iE2 );
1511 double angle = helper.GetAngle( wires[iW]->Edge( iE1 ),
1512 wires[iW]->Edge( iE2 ), F, V );
1513 if ( angle < -5. * M_PI / 180. )
1517 vertices->insert( helper.GetMeshDS()->ShapeToIndex( V ));
1521 return vertices ? !vertices->empty() : false;
1524 //================================================================================
1526 * \brief Returns true if a FACE is bound by a concave EDGE
1528 //================================================================================
1530 bool isConcave( const TopoDS_Face& F,
1531 SMESH_MesherHelper& helper,
1532 set< TGeomID >* vertices = 0 )
1534 bool isConcv = false;
1535 // if ( helper.Count( F, TopAbs_WIRE, /*useMap=*/false) > 1 )
1537 gp_Vec2d drv1, drv2;
1539 TopExp_Explorer eExp( F.Oriented( TopAbs_FORWARD ), TopAbs_EDGE );
1540 for ( ; eExp.More(); eExp.Next() )
1542 const TopoDS_Edge& E = TopoDS::Edge( eExp.Current() );
1543 if ( SMESH_Algo::isDegenerated( E )) continue;
1544 // check if 2D curve is concave
1545 BRepAdaptor_Curve2d curve( E, F );
1546 const int nbIntervals = curve.NbIntervals( GeomAbs_C2 );
1547 TColStd_Array1OfReal intervals(1, nbIntervals + 1 );
1548 curve.Intervals( intervals, GeomAbs_C2 );
1549 bool isConvex = true;
1550 for ( int i = 1; i <= nbIntervals && isConvex; ++i )
1552 double u1 = intervals( i );
1553 double u2 = intervals( i+1 );
1554 curve.D2( 0.5*( u1+u2 ), p, drv1, drv2 );
1555 double cross = drv1 ^ drv2;
1556 if ( E.Orientation() == TopAbs_REVERSED )
1558 isConvex = ( cross > -1e-9 ); // 0.1 );
1562 //cout << "Concave FACE " << helper.GetMeshDS()->ShapeToIndex( F ) << endl;
1571 // check angles at VERTEXes
1572 if ( getConcaveVertices( F, helper, vertices ))
1578 //================================================================================
1580 * \brief Computes mimimal distance of face in-FACE nodes from an EDGE
1581 * \param [in] face - the mesh face to treat
1582 * \param [in] nodeOnEdge - a node on the EDGE
1583 * \param [out] faceSize - the computed distance
1584 * \return bool - true if faceSize computed
1586 //================================================================================
1588 bool getDistFromEdge( const SMDS_MeshElement* face,
1589 const SMDS_MeshNode* nodeOnEdge,
1592 faceSize = Precision::Infinite();
1595 int nbN = face->NbCornerNodes();
1596 int iOnE = face->GetNodeIndex( nodeOnEdge );
1597 int iNext[2] = { SMESH_MesherHelper::WrapIndex( iOnE+1, nbN ),
1598 SMESH_MesherHelper::WrapIndex( iOnE-1, nbN ) };
1599 const SMDS_MeshNode* nNext[2] = { face->GetNode( iNext[0] ),
1600 face->GetNode( iNext[1] ) };
1601 gp_XYZ segVec, segEnd = SMESH_TNodeXYZ( nodeOnEdge ); // segment on EDGE
1602 double segLen = -1.;
1603 // look for two neighbor not in-FACE nodes of face
1604 for ( int i = 0; i < 2; ++i )
1606 if ( nNext[i]->GetPosition()->GetDim() != 2 &&
1607 nNext[i]->GetID() < nodeOnEdge->GetID() )
1609 // look for an in-FACE node
1610 for ( int iN = 0; iN < nbN; ++iN )
1612 if ( iN == iOnE || iN == iNext[i] )
1614 SMESH_TNodeXYZ pInFace = face->GetNode( iN );
1615 gp_XYZ v = pInFace - segEnd;
1618 segVec = SMESH_TNodeXYZ( nNext[i] ) - segEnd;
1619 segLen = segVec.Modulus();
1621 double distToSeg = v.Crossed( segVec ).Modulus() / segLen;
1622 faceSize = Min( faceSize, distToSeg );
1630 //================================================================================
1632 * \brief Return direction of axis or revolution of a surface
1634 //================================================================================
1636 bool getRovolutionAxis( const Adaptor3d_Surface& surface,
1639 switch ( surface.GetType() ) {
1642 gp_Cone cone = surface.Cone();
1643 axis = cone.Axis().Direction();
1646 case GeomAbs_Sphere:
1648 gp_Sphere sphere = surface.Sphere();
1649 axis = sphere.Position().Direction();
1652 case GeomAbs_SurfaceOfRevolution:
1654 axis = surface.AxeOfRevolution().Direction();
1657 //case GeomAbs_SurfaceOfExtrusion:
1658 case GeomAbs_OffsetSurface:
1660 Handle(Adaptor3d_HSurface) base = surface.BasisSurface();
1661 return getRovolutionAxis( base->Surface(), axis );
1663 default: return false;
1668 //--------------------------------------------------------------------------------
1669 // DEBUG. Dump intermediate node positions into a python script
1670 // HOWTO use: run python commands written in a console to see
1671 // construction steps of viscous layers
1677 PyDump(SMESH_Mesh& m) {
1678 int tag = 3 + m.GetId();
1679 const char* fname = "/tmp/viscous.py";
1680 cout << "execfile('"<<fname<<"')"<<endl;
1681 py = _pyStream = new ofstream(fname);
1682 *py << "import SMESH" << endl
1683 << "from salome.smesh import smeshBuilder" << endl
1684 << "smesh = smeshBuilder.New(salome.myStudy)" << endl
1685 << "meshSO = smesh.GetCurrentStudy().FindObjectID('0:1:2:" << tag <<"')" << endl
1686 << "mesh = smesh.Mesh( meshSO.GetObject() )"<<endl;
1691 *py << "mesh.GroupOnFilter(SMESH.VOLUME,'Viscous Prisms',"
1692 "smesh.GetFilter(SMESH.VOLUME,SMESH.FT_ElemGeomType,'=',SMESH.Geom_PENTA))"<<endl;
1693 *py << "mesh.GroupOnFilter(SMESH.VOLUME,'Neg Volumes',"
1694 "smesh.GetFilter(SMESH.VOLUME,SMESH.FT_Volume3D,'<',0))"<<endl;
1698 ~PyDump() { Finish(); cout << "NB FUNCTIONS: " << theNbPyFunc << endl; }
1699 struct MyStream : public ostream
1701 template <class T> ostream & operator<<( const T &anything ) { return *this ; }
1703 void Pause() { py = &_mystream; }
1704 void Resume() { py = _pyStream; }
1708 #define dumpFunction(f) { _dumpFunction(f, __LINE__);}
1709 #define dumpMove(n) { _dumpMove(n, __LINE__);}
1710 #define dumpMoveComm(n,txt) { _dumpMove(n, __LINE__, txt);}
1711 #define dumpCmd(txt) { _dumpCmd(txt, __LINE__);}
1712 void _dumpFunction(const string& fun, int ln)
1713 { if (py) *py<< "def "<<fun<<"(): # "<< ln <<endl; cout<<fun<<"()"<<endl; ++theNbPyFunc; }
1714 void _dumpMove(const SMDS_MeshNode* n, int ln, const char* txt="")
1715 { if (py) *py<< " mesh.MoveNode( "<<n->GetID()<< ", "<< n->X()
1716 << ", "<<n->Y()<<", "<< n->Z()<< ")\t\t # "<< ln <<" "<< txt << endl; }
1717 void _dumpCmd(const string& txt, int ln)
1718 { if (py) *py<< " "<<txt<<" # "<< ln <<endl; }
1719 void dumpFunctionEnd()
1720 { if (py) *py<< " return"<< endl; }
1721 void dumpChangeNodes( const SMDS_MeshElement* f )
1722 { if (py) { *py<< " mesh.ChangeElemNodes( " << f->GetID()<<", [";
1723 for ( int i=1; i < f->NbNodes(); ++i ) *py << f->GetNode(i-1)->GetID()<<", ";
1724 *py << f->GetNode( f->NbNodes()-1 )->GetID() << " ])"<< endl; }}
1725 #define debugMsg( txt ) { cout << "# "<< txt << " (line: " << __LINE__ << ")" << endl; }
1729 struct PyDump { PyDump(SMESH_Mesh&) {} void Finish() {} void Pause() {} void Resume() {} };
1730 #define dumpFunction(f) f
1732 #define dumpMoveComm(n,txt)
1733 #define dumpCmd(txt)
1734 #define dumpFunctionEnd()
1735 #define dumpChangeNodes(f) { if(f) {} } // prevent "unused variable 'f'" warning
1736 #define debugMsg( txt ) {}
1741 using namespace VISCOUS_3D;
1743 //================================================================================
1745 * \brief Constructor of _ViscousBuilder
1747 //================================================================================
1749 _ViscousBuilder::_ViscousBuilder()
1751 _error = SMESH_ComputeError::New(COMPERR_OK);
1755 //================================================================================
1757 * \brief Stores error description and returns false
1759 //================================================================================
1761 bool _ViscousBuilder::error(const string& text, int solidId )
1763 const string prefix = string("Viscous layers builder: ");
1764 _error->myName = COMPERR_ALGO_FAILED;
1765 _error->myComment = prefix + text;
1768 SMESH_subMesh* sm = _mesh->GetSubMeshContaining( solidId );
1769 if ( !sm && !_sdVec.empty() )
1770 sm = _mesh->GetSubMeshContaining( solidId = _sdVec[0]._index );
1771 if ( sm && sm->GetSubShape().ShapeType() == TopAbs_SOLID )
1773 SMESH_ComputeErrorPtr& smError = sm->GetComputeError();
1774 if ( smError && smError->myAlgo )
1775 _error->myAlgo = smError->myAlgo;
1777 sm->ComputeStateEngine( SMESH_subMesh::CHECK_COMPUTE_STATE );
1779 // set KO to all solids
1780 for ( size_t i = 0; i < _sdVec.size(); ++i )
1782 if ( _sdVec[i]._index == solidId )
1784 sm = _mesh->GetSubMesh( _sdVec[i]._solid );
1785 if ( !sm->IsEmpty() )
1787 SMESH_ComputeErrorPtr& smError = sm->GetComputeError();
1788 if ( !smError || smError->IsOK() )
1790 smError = SMESH_ComputeError::New( COMPERR_ALGO_FAILED, prefix + "failed");
1791 sm->ComputeStateEngine( SMESH_subMesh::CHECK_COMPUTE_STATE );
1795 makeGroupOfLE(); // debug
1800 //================================================================================
1802 * \brief At study restoration, restore event listeners used to clear an inferior
1803 * dim sub-mesh modified by viscous layers
1805 //================================================================================
1807 void _ViscousBuilder::RestoreListeners()
1812 //================================================================================
1814 * \brief computes SMESH_ProxyMesh::SubMesh::_n2n
1816 //================================================================================
1818 bool _ViscousBuilder::MakeN2NMap( _MeshOfSolid* pm )
1820 SMESH_subMesh* solidSM = pm->mySubMeshes.front();
1821 TopExp_Explorer fExp( solidSM->GetSubShape(), TopAbs_FACE );
1822 for ( ; fExp.More(); fExp.Next() )
1824 SMESHDS_SubMesh* srcSmDS = pm->GetMeshDS()->MeshElements( fExp.Current() );
1825 const SMESH_ProxyMesh::SubMesh* prxSmDS = pm->GetProxySubMesh( fExp.Current() );
1827 if ( !srcSmDS || !prxSmDS || !srcSmDS->NbElements() || !prxSmDS->NbElements() )
1829 if ( srcSmDS->GetElements()->next() == prxSmDS->GetElements()->next())
1832 if ( srcSmDS->NbElements() != prxSmDS->NbElements() )
1833 return error( "Different nb elements in a source and a proxy sub-mesh", solidSM->GetId());
1835 SMDS_ElemIteratorPtr srcIt = srcSmDS->GetElements();
1836 SMDS_ElemIteratorPtr prxIt = prxSmDS->GetElements();
1837 while( prxIt->more() )
1839 const SMDS_MeshElement* fSrc = srcIt->next();
1840 const SMDS_MeshElement* fPrx = prxIt->next();
1841 if ( fSrc->NbNodes() != fPrx->NbNodes())
1842 return error( "Different elements in a source and a proxy sub-mesh", solidSM->GetId());
1843 for ( int i = 0 ; i < fPrx->NbNodes(); ++i )
1844 pm->setNode2Node( fSrc->GetNode(i), fPrx->GetNode(i), prxSmDS );
1847 pm->_n2nMapComputed = true;
1851 //================================================================================
1853 * \brief Does its job
1855 //================================================================================
1857 SMESH_ComputeErrorPtr _ViscousBuilder::Compute(SMESH_Mesh& theMesh,
1858 const TopoDS_Shape& theShape)
1862 // check if proxy mesh already computed
1863 TopExp_Explorer exp( theShape, TopAbs_SOLID );
1865 return error("No SOLID's in theShape"), _error;
1867 if ( _ViscousListener::GetSolidMesh( _mesh, exp.Current(), /*toCreate=*/false))
1868 return SMESH_ComputeErrorPtr(); // everything already computed
1870 PyDump debugDump( theMesh );
1871 _pyDump = &debugDump;
1873 // TODO: ignore already computed SOLIDs
1874 if ( !findSolidsWithLayers())
1877 if ( !findFacesWithLayers() )
1880 for ( size_t i = 0; i < _sdVec.size(); ++i )
1883 for ( iSD = 0; iSD < _sdVec.size(); ++iSD ) // find next SOLID to compute
1884 if ( _sdVec[iSD]._before.IsEmpty() &&
1885 !_sdVec[iSD]._solid.IsNull() &&
1886 _sdVec[iSD]._n2eMap.empty() )
1889 if ( ! makeLayer(_sdVec[iSD]) ) // create _LayerEdge's
1892 if ( _sdVec[iSD]._n2eMap.size() == 0 ) // no layers in a SOLID
1894 _sdVec[iSD]._solid.Nullify();
1898 if ( ! inflate(_sdVec[iSD]) ) // increase length of _LayerEdge's
1901 if ( ! refine(_sdVec[iSD]) ) // create nodes and prisms
1904 if ( ! shrink(_sdVec[iSD]) ) // shrink 2D mesh on FACEs w/o layer
1907 addBoundaryElements(_sdVec[iSD]); // create quadrangles on prism bare sides
1909 const TopoDS_Shape& solid = _sdVec[iSD]._solid;
1910 for ( iSD = 0; iSD < _sdVec.size(); ++iSD )
1911 _sdVec[iSD]._before.Remove( solid );
1914 makeGroupOfLE(); // debug
1920 //================================================================================
1922 * \brief Check validity of hypotheses
1924 //================================================================================
1926 SMESH_ComputeErrorPtr _ViscousBuilder::CheckHypotheses( SMESH_Mesh& mesh,
1927 const TopoDS_Shape& shape )
1931 if ( _ViscousListener::GetSolidMesh( _mesh, shape, /*toCreate=*/false))
1932 return SMESH_ComputeErrorPtr(); // everything already computed
1935 findSolidsWithLayers();
1936 bool ok = findFacesWithLayers( true );
1938 // remove _MeshOfSolid's of _SolidData's
1939 for ( size_t i = 0; i < _sdVec.size(); ++i )
1940 _ViscousListener::RemoveSolidMesh( _mesh, _sdVec[i]._solid );
1945 return SMESH_ComputeErrorPtr();
1948 //================================================================================
1950 * \brief Finds SOLIDs to compute using viscous layers. Fills _sdVec
1952 //================================================================================
1954 bool _ViscousBuilder::findSolidsWithLayers()
1957 TopTools_IndexedMapOfShape allSolids;
1958 TopExp::MapShapes( _mesh->GetShapeToMesh(), TopAbs_SOLID, allSolids );
1959 _sdVec.reserve( allSolids.Extent());
1961 SMESH_HypoFilter filter;
1962 for ( int i = 1; i <= allSolids.Extent(); ++i )
1964 // find StdMeshers_ViscousLayers hyp assigned to the i-th solid
1965 SMESH_subMesh* sm = _mesh->GetSubMesh( allSolids(i) );
1966 if ( sm->GetSubMeshDS() && sm->GetSubMeshDS()->NbElements() > 0 )
1967 continue; // solid is already meshed
1968 SMESH_Algo* algo = sm->GetAlgo();
1969 if ( !algo ) continue;
1970 // TODO: check if algo is hidden
1971 const list <const SMESHDS_Hypothesis *> & allHyps =
1972 algo->GetUsedHypothesis(*_mesh, allSolids(i), /*ignoreAuxiliary=*/false);
1973 _SolidData* soData = 0;
1974 list< const SMESHDS_Hypothesis *>::const_iterator hyp = allHyps.begin();
1975 const StdMeshers_ViscousLayers* viscHyp = 0;
1976 for ( ; hyp != allHyps.end(); ++hyp )
1977 if (( viscHyp = dynamic_cast<const StdMeshers_ViscousLayers*>( *hyp )))
1979 TopoDS_Shape hypShape;
1980 filter.Init( filter.Is( viscHyp ));
1981 _mesh->GetHypothesis( allSolids(i), filter, true, &hypShape );
1985 _MeshOfSolid* proxyMesh = _ViscousListener::GetSolidMesh( _mesh,
1988 _sdVec.push_back( _SolidData( allSolids(i), proxyMesh ));
1989 soData = & _sdVec.back();
1990 soData->_index = getMeshDS()->ShapeToIndex( allSolids(i));
1991 soData->_helper = new SMESH_MesherHelper( *_mesh );
1992 soData->_helper->SetSubShape( allSolids(i) );
1993 _solids.Add( allSolids(i) );
1995 soData->_hyps.push_back( viscHyp );
1996 soData->_hypShapes.push_back( hypShape );
1999 if ( _sdVec.empty() )
2001 ( SMESH_Comment(StdMeshers_ViscousLayers::GetHypType()) << " hypothesis not found",0);
2006 //================================================================================
2008 * \brief Set a _SolidData to be computed before another
2010 //================================================================================
2012 bool _ViscousBuilder::setBefore( _SolidData& solidBefore, _SolidData& solidAfter )
2014 // check possibility to set this order; get all solids before solidBefore
2015 TopTools_IndexedMapOfShape allSolidsBefore;
2016 allSolidsBefore.Add( solidBefore._solid );
2017 for ( int i = 1; i <= allSolidsBefore.Extent(); ++i )
2019 int iSD = _solids.FindIndex( allSolidsBefore(i) );
2022 TopTools_MapIteratorOfMapOfShape soIt( _sdVec[ iSD-1 ]._before );
2023 for ( ; soIt.More(); soIt.Next() )
2024 allSolidsBefore.Add( soIt.Value() );
2027 if ( allSolidsBefore.Contains( solidAfter._solid ))
2030 for ( int i = 1; i <= allSolidsBefore.Extent(); ++i )
2031 solidAfter._before.Add( allSolidsBefore(i) );
2036 //================================================================================
2040 //================================================================================
2042 bool _ViscousBuilder::findFacesWithLayers(const bool onlyWith)
2044 SMESH_MesherHelper helper( *_mesh );
2045 TopExp_Explorer exp;
2047 // collect all faces-to-ignore defined by hyp
2048 for ( size_t i = 0; i < _sdVec.size(); ++i )
2050 // get faces-to-ignore defined by each hyp
2051 typedef const StdMeshers_ViscousLayers* THyp;
2052 typedef std::pair< set<TGeomID>, THyp > TFacesOfHyp;
2053 list< TFacesOfHyp > ignoreFacesOfHyps;
2054 list< THyp >::iterator hyp = _sdVec[i]._hyps.begin();
2055 list< TopoDS_Shape >::iterator hypShape = _sdVec[i]._hypShapes.begin();
2056 for ( ; hyp != _sdVec[i]._hyps.end(); ++hyp, ++hypShape )
2058 ignoreFacesOfHyps.push_back( TFacesOfHyp( set<TGeomID>(), *hyp ));
2059 getIgnoreFaces( _sdVec[i]._solid, *hyp, *hypShape, ignoreFacesOfHyps.back().first );
2062 // fill _SolidData::_face2hyp and check compatibility of hypotheses
2063 const int nbHyps = _sdVec[i]._hyps.size();
2066 // check if two hypotheses define different parameters for the same FACE
2067 list< TFacesOfHyp >::iterator igFacesOfHyp;
2068 for ( exp.Init( _sdVec[i]._solid, TopAbs_FACE ); exp.More(); exp.Next() )
2070 const TGeomID faceID = getMeshDS()->ShapeToIndex( exp.Current() );
2072 igFacesOfHyp = ignoreFacesOfHyps.begin();
2073 for ( ; igFacesOfHyp != ignoreFacesOfHyps.end(); ++igFacesOfHyp )
2074 if ( ! igFacesOfHyp->first.count( faceID ))
2077 return error(SMESH_Comment("Several hypotheses define "
2078 "Viscous Layers on the face #") << faceID );
2079 hyp = igFacesOfHyp->second;
2082 _sdVec[i]._face2hyp.insert( make_pair( faceID, hyp ));
2084 _sdVec[i]._ignoreFaceIds.insert( faceID );
2087 // check if two hypotheses define different number of viscous layers for
2088 // adjacent faces of a solid
2089 set< int > nbLayersSet;
2090 igFacesOfHyp = ignoreFacesOfHyps.begin();
2091 for ( ; igFacesOfHyp != ignoreFacesOfHyps.end(); ++igFacesOfHyp )
2093 nbLayersSet.insert( igFacesOfHyp->second->GetNumberLayers() );
2095 if ( nbLayersSet.size() > 1 )
2097 for ( exp.Init( _sdVec[i]._solid, TopAbs_EDGE ); exp.More(); exp.Next() )
2099 PShapeIteratorPtr fIt = helper.GetAncestors( exp.Current(), *_mesh, TopAbs_FACE );
2100 THyp hyp1 = 0, hyp2 = 0;
2101 while( const TopoDS_Shape* face = fIt->next() )
2103 const TGeomID faceID = getMeshDS()->ShapeToIndex( *face );
2104 map< TGeomID, THyp >::iterator f2h = _sdVec[i]._face2hyp.find( faceID );
2105 if ( f2h != _sdVec[i]._face2hyp.end() )
2107 ( hyp1 ? hyp2 : hyp1 ) = f2h->second;
2110 if ( hyp1 && hyp2 &&
2111 hyp1->GetNumberLayers() != hyp2->GetNumberLayers() )
2113 return error("Two hypotheses define different number of "
2114 "viscous layers on adjacent faces");
2118 } // if ( nbHyps > 1 )
2121 _sdVec[i]._ignoreFaceIds.swap( ignoreFacesOfHyps.back().first );
2125 if ( onlyWith ) // is called to check hypotheses compatibility only
2128 // fill _SolidData::_reversedFaceIds
2129 for ( size_t i = 0; i < _sdVec.size(); ++i )
2131 exp.Init( _sdVec[i]._solid.Oriented( TopAbs_FORWARD ), TopAbs_FACE );
2132 for ( ; exp.More(); exp.Next() )
2134 const TopoDS_Face& face = TopoDS::Face( exp.Current() );
2135 const TGeomID faceID = getMeshDS()->ShapeToIndex( face );
2136 if ( //!sdVec[i]._ignoreFaceIds.count( faceID ) &&
2137 helper.NbAncestors( face, *_mesh, TopAbs_SOLID ) > 1 &&
2138 helper.IsReversedSubMesh( face ))
2140 _sdVec[i]._reversedFaceIds.insert( faceID );
2145 // Find FACEs to shrink mesh on (solution 2 in issue 0020832): fill in _shrinkShape2Shape
2146 TopTools_IndexedMapOfShape shapes;
2147 std::string structAlgoName = "Hexa_3D";
2148 for ( size_t i = 0; i < _sdVec.size(); ++i )
2151 TopExp::MapShapes(_sdVec[i]._solid, TopAbs_EDGE, shapes);
2152 for ( int iE = 1; iE <= shapes.Extent(); ++iE )
2154 const TopoDS_Shape& edge = shapes(iE);
2155 // find 2 FACEs sharing an EDGE
2157 PShapeIteratorPtr fIt = helper.GetAncestors(edge, *_mesh, TopAbs_FACE, &_sdVec[i]._solid);
2158 while ( fIt->more())
2160 const TopoDS_Shape* f = fIt->next();
2161 FF[ int( !FF[0].IsNull()) ] = *f;
2163 if( FF[1].IsNull() ) continue; // seam edge can be shared by 1 FACE only
2165 // check presence of layers on them
2167 for ( int j = 0; j < 2; ++j )
2168 ignore[j] = _sdVec[i]._ignoreFaceIds.count( getMeshDS()->ShapeToIndex( FF[j] ));
2169 if ( ignore[0] == ignore[1] )
2170 continue; // nothing interesting
2171 TopoDS_Shape fWOL = FF[ ignore[0] ? 0 : 1 ];
2174 if ( !fWOL.IsNull())
2176 TGeomID edgeInd = getMeshDS()->ShapeToIndex( edge );
2177 _sdVec[i]._shrinkShape2Shape.insert( make_pair( edgeInd, fWOL ));
2182 // Find the SHAPE along which to inflate _LayerEdge based on VERTEX
2184 for ( size_t i = 0; i < _sdVec.size(); ++i )
2187 TopExp::MapShapes(_sdVec[i]._solid, TopAbs_VERTEX, shapes);
2188 for ( int iV = 1; iV <= shapes.Extent(); ++iV )
2190 const TopoDS_Shape& vertex = shapes(iV);
2191 // find faces WOL sharing the vertex
2192 vector< TopoDS_Shape > facesWOL;
2193 size_t totalNbFaces = 0;
2194 PShapeIteratorPtr fIt = helper.GetAncestors(vertex, *_mesh, TopAbs_FACE, &_sdVec[i]._solid );
2195 while ( fIt->more())
2197 const TopoDS_Shape* f = fIt->next();
2199 const int fID = getMeshDS()->ShapeToIndex( *f );
2200 if ( _sdVec[i]._ignoreFaceIds.count ( fID ) /*&& !_sdVec[i]._noShrinkShapes.count( fID )*/)
2201 facesWOL.push_back( *f );
2203 if ( facesWOL.size() == totalNbFaces || facesWOL.empty() )
2204 continue; // no layers at this vertex or no WOL
2205 TGeomID vInd = getMeshDS()->ShapeToIndex( vertex );
2206 switch ( facesWOL.size() )
2210 helper.SetSubShape( facesWOL[0] );
2211 if ( helper.IsRealSeam( vInd )) // inflate along a seam edge?
2213 TopoDS_Shape seamEdge;
2214 PShapeIteratorPtr eIt = helper.GetAncestors(vertex, *_mesh, TopAbs_EDGE);
2215 while ( eIt->more() && seamEdge.IsNull() )
2217 const TopoDS_Shape* e = eIt->next();
2218 if ( helper.IsRealSeam( *e ) )
2221 if ( !seamEdge.IsNull() )
2223 _sdVec[i]._shrinkShape2Shape.insert( make_pair( vInd, seamEdge ));
2227 _sdVec[i]._shrinkShape2Shape.insert( make_pair( vInd, facesWOL[0] ));
2232 // find an edge shared by 2 faces
2233 PShapeIteratorPtr eIt = helper.GetAncestors(vertex, *_mesh, TopAbs_EDGE);
2234 while ( eIt->more())
2236 const TopoDS_Shape* e = eIt->next();
2237 if ( helper.IsSubShape( *e, facesWOL[0]) &&
2238 helper.IsSubShape( *e, facesWOL[1]))
2240 _sdVec[i]._shrinkShape2Shape.insert( make_pair( vInd, *e )); break;
2246 return error("Not yet supported case", _sdVec[i]._index);
2251 // Add to _noShrinkShapes sub-shapes of FACE's that can't be shrinked since
2252 // the algo of the SOLID sharing the FACE does not support it or for other reasons
2253 set< string > notSupportAlgos; notSupportAlgos.insert( structAlgoName );
2254 for ( size_t i = 0; i < _sdVec.size(); ++i )
2256 map< TGeomID, TopoDS_Shape >::iterator e2f = _sdVec[i]._shrinkShape2Shape.begin();
2257 for ( ; e2f != _sdVec[i]._shrinkShape2Shape.end(); ++e2f )
2259 const TopoDS_Shape& fWOL = e2f->second;
2260 const TGeomID edgeID = e2f->first;
2261 TGeomID faceID = getMeshDS()->ShapeToIndex( fWOL );
2262 TopoDS_Shape edge = getMeshDS()->IndexToShape( edgeID );
2263 if ( edge.ShapeType() != TopAbs_EDGE )
2264 continue; // shrink shape is VERTEX
2267 PShapeIteratorPtr soIt = helper.GetAncestors(fWOL, *_mesh, TopAbs_SOLID);
2268 while ( soIt->more() && solid.IsNull() )
2270 const TopoDS_Shape* so = soIt->next();
2271 if ( !so->IsSame( _sdVec[i]._solid ))
2274 if ( solid.IsNull() )
2277 bool noShrinkE = false;
2278 SMESH_Algo* algo = _mesh->GetSubMesh( solid )->GetAlgo();
2279 bool isStructured = ( algo && algo->GetName() == structAlgoName );
2280 size_t iSolid = _solids.FindIndex( solid ) - 1;
2281 if ( iSolid < _sdVec.size() && _sdVec[ iSolid ]._ignoreFaceIds.count( faceID ))
2283 // the adjacent SOLID has NO layers on fWOL;
2284 // shrink allowed if
2285 // - there are layers on the EDGE in the adjacent SOLID
2286 // - there are NO layers in the adjacent SOLID && algo is unstructured and computed later
2287 bool hasWLAdj = (_sdVec[iSolid]._shrinkShape2Shape.count( edgeID ));
2288 bool shrinkAllowed = (( hasWLAdj ) ||
2289 ( !isStructured && setBefore( _sdVec[ i ], _sdVec[ iSolid ] )));
2290 noShrinkE = !shrinkAllowed;
2292 else if ( iSolid < _sdVec.size() )
2294 // the adjacent SOLID has layers on fWOL;
2295 // check if SOLID's mesh is unstructured and then try to set it
2296 // to be computed after the i-th solid
2297 if ( isStructured || !setBefore( _sdVec[ i ], _sdVec[ iSolid ] ))
2298 noShrinkE = true; // don't shrink fWOL
2302 // the adjacent SOLID has NO layers at all
2303 noShrinkE = isStructured;
2308 _sdVec[i]._noShrinkShapes.insert( edgeID );
2310 // check if there is a collision with to-shrink-from EDGEs in iSolid
2311 // if ( iSolid < _sdVec.size() )
2314 // TopExp::MapShapes( fWOL, TopAbs_EDGE, shapes);
2315 // for ( int iE = 1; iE <= shapes.Extent(); ++iE )
2317 // const TopoDS_Edge& E = TopoDS::Edge( shapes( iE ));
2318 // const TGeomID eID = getMeshDS()->ShapeToIndex( E );
2319 // if ( eID == edgeID ||
2320 // !_sdVec[iSolid]._shrinkShape2Shape.count( eID ) ||
2321 // _sdVec[i]._noShrinkShapes.count( eID ))
2323 // for ( int is1st = 0; is1st < 2; ++is1st )
2325 // TopoDS_Vertex V = helper.IthVertex( is1st, E );
2326 // if ( _sdVec[i]._noShrinkShapes.count( getMeshDS()->ShapeToIndex( V ) ))
2328 // return error("No way to make a conformal mesh with "
2329 // "the given set of faces with layers", _sdVec[i]._index);
2336 // add VERTEXes of the edge in _noShrinkShapes, which is necessary if
2337 // _shrinkShape2Shape is different in the adjacent SOLID
2338 for ( TopoDS_Iterator vIt( edge ); vIt.More(); vIt.Next() )
2340 TGeomID vID = getMeshDS()->ShapeToIndex( vIt.Value() );
2341 bool noShrinkV = false;
2343 if ( iSolid < _sdVec.size() )
2345 if ( _sdVec[ iSolid ]._ignoreFaceIds.count( faceID ))
2347 map< TGeomID, TopoDS_Shape >::iterator i2S, i2SAdj;
2348 i2S = _sdVec[i ]._shrinkShape2Shape.find( vID );
2349 i2SAdj = _sdVec[iSolid]._shrinkShape2Shape.find( vID );
2350 if ( i2SAdj == _sdVec[iSolid]._shrinkShape2Shape.end() )
2351 noShrinkV = ( i2S->second.ShapeType() == TopAbs_EDGE || isStructured );
2353 noShrinkV = ( ! i2S->second.IsSame( i2SAdj->second ));
2357 noShrinkV = noShrinkE;
2362 // the adjacent SOLID has NO layers at all
2363 noShrinkV = ( isStructured ||
2364 _sdVec[i]._shrinkShape2Shape[ vID ].ShapeType() == TopAbs_EDGE );
2367 _sdVec[i]._noShrinkShapes.insert( vID );
2370 } // loop on _sdVec[i]._shrinkShape2Shape
2371 } // loop on _sdVec to fill in _SolidData::_noShrinkShapes
2374 // add FACEs of other SOLIDs to _ignoreFaceIds
2375 for ( size_t i = 0; i < _sdVec.size(); ++i )
2378 TopExp::MapShapes(_sdVec[i]._solid, TopAbs_FACE, shapes);
2380 for ( exp.Init( _mesh->GetShapeToMesh(), TopAbs_FACE ); exp.More(); exp.Next() )
2382 if ( !shapes.Contains( exp.Current() ))
2383 _sdVec[i]._ignoreFaceIds.insert( getMeshDS()->ShapeToIndex( exp.Current() ));
2390 //================================================================================
2392 * \brief Finds FACEs w/o layers for a given SOLID by an hypothesis
2394 //================================================================================
2396 void _ViscousBuilder::getIgnoreFaces(const TopoDS_Shape& solid,
2397 const StdMeshers_ViscousLayers* hyp,
2398 const TopoDS_Shape& hypShape,
2399 set<TGeomID>& ignoreFaceIds)
2401 TopExp_Explorer exp;
2403 vector<TGeomID> ids = hyp->GetBndShapes();
2404 if ( hyp->IsToIgnoreShapes() ) // FACEs to ignore are given
2406 for ( size_t ii = 0; ii < ids.size(); ++ii )
2408 const TopoDS_Shape& s = getMeshDS()->IndexToShape( ids[ii] );
2409 if ( !s.IsNull() && s.ShapeType() == TopAbs_FACE )
2410 ignoreFaceIds.insert( ids[ii] );
2413 else // FACEs with layers are given
2415 exp.Init( solid, TopAbs_FACE );
2416 for ( ; exp.More(); exp.Next() )
2418 TGeomID faceInd = getMeshDS()->ShapeToIndex( exp.Current() );
2419 if ( find( ids.begin(), ids.end(), faceInd ) == ids.end() )
2420 ignoreFaceIds.insert( faceInd );
2424 // ignore internal FACEs if inlets and outlets are specified
2425 if ( hyp->IsToIgnoreShapes() )
2427 TopTools_IndexedDataMapOfShapeListOfShape solidsOfFace;
2428 TopExp::MapShapesAndAncestors( hypShape,
2429 TopAbs_FACE, TopAbs_SOLID, solidsOfFace);
2431 for ( exp.Init( solid, TopAbs_FACE ); exp.More(); exp.Next() )
2433 const TopoDS_Face& face = TopoDS::Face( exp.Current() );
2434 if ( SMESH_MesherHelper::NbAncestors( face, *_mesh, TopAbs_SOLID ) < 2 )
2437 int nbSolids = solidsOfFace.FindFromKey( face ).Extent();
2439 ignoreFaceIds.insert( getMeshDS()->ShapeToIndex( face ));
2444 //================================================================================
2446 * \brief Create the inner surface of the viscous layer and prepare data for infation
2448 //================================================================================
2450 bool _ViscousBuilder::makeLayer(_SolidData& data)
2452 // get all sub-shapes to make layers on
2453 set<TGeomID> subIds, faceIds;
2454 subIds = data._noShrinkShapes;
2455 TopExp_Explorer exp( data._solid, TopAbs_FACE );
2456 for ( ; exp.More(); exp.Next() )
2458 SMESH_subMesh* fSubM = _mesh->GetSubMesh( exp.Current() );
2459 if ( ! data._ignoreFaceIds.count( fSubM->GetId() ))
2460 faceIds.insert( fSubM->GetId() );
2463 // make a map to find new nodes on sub-shapes shared with other SOLID
2464 map< TGeomID, TNode2Edge* >::iterator s2ne;
2465 map< TGeomID, TopoDS_Shape >::iterator s2s = data._shrinkShape2Shape.begin();
2466 for (; s2s != data._shrinkShape2Shape.end(); ++s2s )
2468 TGeomID shapeInd = s2s->first;
2469 for ( size_t i = 0; i < _sdVec.size(); ++i )
2471 if ( _sdVec[i]._index == data._index ) continue;
2472 map< TGeomID, TopoDS_Shape >::iterator s2s2 = _sdVec[i]._shrinkShape2Shape.find( shapeInd );
2473 if ( s2s2 != _sdVec[i]._shrinkShape2Shape.end() &&
2474 *s2s == *s2s2 && !_sdVec[i]._n2eMap.empty() )
2476 data._s2neMap.insert( make_pair( shapeInd, &_sdVec[i]._n2eMap ));
2482 // Create temporary faces and _LayerEdge's
2484 dumpFunction(SMESH_Comment("makeLayers_")<<data._index);
2486 data._stepSize = Precision::Infinite();
2487 data._stepSizeNodes[0] = 0;
2489 SMESH_MesherHelper helper( *_mesh );
2490 helper.SetSubShape( data._solid );
2491 helper.SetElementsOnShape( true );
2493 vector< const SMDS_MeshNode*> newNodes; // of a mesh face
2494 TNode2Edge::iterator n2e2;
2496 // collect _LayerEdge's of shapes they are based on
2497 vector< _EdgesOnShape >& edgesByGeom = data._edgesOnShape;
2498 const int nbShapes = getMeshDS()->MaxShapeIndex();
2499 edgesByGeom.resize( nbShapes+1 );
2501 // set data of _EdgesOnShape's
2502 if ( SMESH_subMesh* sm = _mesh->GetSubMesh( data._solid ))
2504 SMESH_subMeshIteratorPtr smIt = sm->getDependsOnIterator(/*includeSelf=*/false);
2505 while ( smIt->more() )
2508 if ( sm->GetSubShape().ShapeType() == TopAbs_FACE &&
2509 !faceIds.count( sm->GetId() ))
2511 setShapeData( edgesByGeom[ sm->GetId() ], sm, data );
2514 // make _LayerEdge's
2515 for ( set<TGeomID>::iterator id = faceIds.begin(); id != faceIds.end(); ++id )
2517 const TopoDS_Face& F = TopoDS::Face( getMeshDS()->IndexToShape( *id ));
2518 SMESH_subMesh* sm = _mesh->GetSubMesh( F );
2519 SMESH_ProxyMesh::SubMesh* proxySub =
2520 data._proxyMesh->getFaceSubM( F, /*create=*/true);
2522 SMESHDS_SubMesh* smDS = sm->GetSubMeshDS();
2523 if ( !smDS ) return error(SMESH_Comment("Not meshed face ") << *id, data._index );
2525 SMDS_ElemIteratorPtr eIt = smDS->GetElements();
2526 while ( eIt->more() )
2528 const SMDS_MeshElement* face = eIt->next();
2529 double faceMaxCosin = -1;
2530 _LayerEdge* maxCosinEdge = 0;
2531 int nbDegenNodes = 0;
2533 newNodes.resize( face->NbCornerNodes() );
2534 for ( size_t i = 0 ; i < newNodes.size(); ++i )
2536 const SMDS_MeshNode* n = face->GetNode( i );
2537 const int shapeID = n->getshapeId();
2538 const bool onDegenShap = helper.IsDegenShape( shapeID );
2539 const bool onDegenEdge = ( onDegenShap && n->GetPosition()->GetDim() == 1 );
2544 // substitute n on a degenerated EDGE with a node on a corresponding VERTEX
2545 const TopoDS_Shape& E = getMeshDS()->IndexToShape( shapeID );
2546 TopoDS_Vertex V = helper.IthVertex( 0, TopoDS::Edge( E ));
2547 if ( const SMDS_MeshNode* vN = SMESH_Algo::VertexNode( V, getMeshDS() )) {
2557 TNode2Edge::iterator n2e = data._n2eMap.insert( make_pair( n, (_LayerEdge*)0 )).first;
2558 if ( !(*n2e).second )
2561 _LayerEdge* edge = new _LayerEdge();
2562 edge->_nodes.push_back( n );
2564 edgesByGeom[ shapeID ]._edges.push_back( edge );
2565 const bool noShrink = data._noShrinkShapes.count( shapeID );
2567 SMESH_TNodeXYZ xyz( n );
2569 // set edge data or find already refined _LayerEdge and get data from it
2570 if (( !noShrink ) &&
2571 ( n->GetPosition()->GetTypeOfPosition() != SMDS_TOP_FACE ) &&
2572 (( s2ne = data._s2neMap.find( shapeID )) != data._s2neMap.end() ) &&
2573 (( n2e2 = (*s2ne).second->find( n )) != s2ne->second->end() ))
2575 _LayerEdge* foundEdge = (*n2e2).second;
2576 gp_XYZ lastPos = edge->Copy( *foundEdge, edgesByGeom[ shapeID ], helper );
2577 foundEdge->_pos.push_back( lastPos );
2578 // location of the last node is modified and we restore it by foundEdge->_pos.back()
2579 const_cast< SMDS_MeshNode* >
2580 ( edge->_nodes.back() )->setXYZ( xyz.X(), xyz.Y(), xyz.Z() );
2586 edge->_nodes.push_back( helper.AddNode( xyz.X(), xyz.Y(), xyz.Z() ));
2588 if ( !setEdgeData( *edge, edgesByGeom[ shapeID ], helper, data ))
2591 if ( edge->_nodes.size() < 2 )
2592 edge->Block( data );
2593 //data._noShrinkShapes.insert( shapeID );
2595 dumpMove(edge->_nodes.back());
2597 if ( edge->_cosin > faceMaxCosin )
2599 faceMaxCosin = edge->_cosin;
2600 maxCosinEdge = edge;
2603 newNodes[ i ] = n2e->second->_nodes.back();
2606 data._n2eMap.insert( make_pair( face->GetNode( i ), n2e->second ));
2608 if ( newNodes.size() - nbDegenNodes < 2 )
2611 // create a temporary face
2612 const SMDS_MeshElement* newFace =
2613 new _TmpMeshFace( newNodes, --_tmpFaceID, face->getshapeId(), face->getIdInShape() );
2614 proxySub->AddElement( newFace );
2616 // compute inflation step size by min size of element on a convex surface
2617 if ( faceMaxCosin > theMinSmoothCosin )
2618 limitStepSize( data, face, maxCosinEdge );
2620 } // loop on 2D elements on a FACE
2621 } // loop on FACEs of a SOLID to create _LayerEdge's
2624 // Set _LayerEdge::_neibors
2625 TNode2Edge::iterator n2e;
2626 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
2628 _EdgesOnShape& eos = data._edgesOnShape[iS];
2629 for ( size_t i = 0; i < eos._edges.size(); ++i )
2631 _LayerEdge* edge = eos._edges[i];
2632 TIDSortedNodeSet nearNodes;
2633 SMDS_ElemIteratorPtr fIt = edge->_nodes[0]->GetInverseElementIterator(SMDSAbs_Face);
2634 while ( fIt->more() )
2636 const SMDS_MeshElement* f = fIt->next();
2637 if ( !data._ignoreFaceIds.count( f->getshapeId() ))
2638 nearNodes.insert( f->begin_nodes(), f->end_nodes() );
2640 nearNodes.erase( edge->_nodes[0] );
2641 edge->_neibors.reserve( nearNodes.size() );
2642 TIDSortedNodeSet::iterator node = nearNodes.begin();
2643 for ( ; node != nearNodes.end(); ++node )
2644 if (( n2e = data._n2eMap.find( *node )) != data._n2eMap.end() )
2645 edge->_neibors.push_back( n2e->second );
2649 data._epsilon = 1e-7;
2650 if ( data._stepSize < 1. )
2651 data._epsilon *= data._stepSize;
2653 if ( !findShapesToSmooth( data )) // _LayerEdge::_maxLen is computed here
2656 // limit data._stepSize depending on surface curvature and fill data._convexFaces
2657 limitStepSizeByCurvature( data ); // !!! it must be before node substitution in _Simplex
2659 // Set target nodes into _Simplex and _LayerEdge's to _2NearEdges
2660 const SMDS_MeshNode* nn[2];
2661 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
2663 _EdgesOnShape& eos = data._edgesOnShape[iS];
2664 for ( size_t i = 0; i < eos._edges.size(); ++i )
2666 _LayerEdge* edge = eos._edges[i];
2667 if ( edge->IsOnEdge() )
2669 // get neighbor nodes
2670 bool hasData = ( edge->_2neibors->_edges[0] );
2671 if ( hasData ) // _LayerEdge is a copy of another one
2673 nn[0] = edge->_2neibors->srcNode(0);
2674 nn[1] = edge->_2neibors->srcNode(1);
2676 else if ( !findNeiborsOnEdge( edge, nn[0],nn[1], eos, data ))
2680 // set neighbor _LayerEdge's
2681 for ( int j = 0; j < 2; ++j )
2683 if (( n2e = data._n2eMap.find( nn[j] )) == data._n2eMap.end() )
2684 return error("_LayerEdge not found by src node", data._index);
2685 edge->_2neibors->_edges[j] = n2e->second;
2688 edge->SetDataByNeighbors( nn[0], nn[1], eos, helper );
2691 for ( size_t j = 0; j < edge->_simplices.size(); ++j )
2693 _Simplex& s = edge->_simplices[j];
2694 s._nNext = data._n2eMap[ s._nNext ]->_nodes.back();
2695 s._nPrev = data._n2eMap[ s._nPrev ]->_nodes.back();
2698 // For an _LayerEdge on a degenerated EDGE, copy some data from
2699 // a corresponding _LayerEdge on a VERTEX
2700 // (issue 52453, pb on a downloaded SampleCase2-Tet-netgen-mephisto.hdf)
2701 if ( helper.IsDegenShape( edge->_nodes[0]->getshapeId() ))
2703 // Generally we should not get here
2704 if ( eos.ShapeType() != TopAbs_EDGE )
2706 TopoDS_Vertex V = helper.IthVertex( 0, TopoDS::Edge( eos._shape ));
2707 const SMDS_MeshNode* vN = SMESH_Algo::VertexNode( V, getMeshDS() );
2708 if (( n2e = data._n2eMap.find( vN )) == data._n2eMap.end() )
2710 const _LayerEdge* vEdge = n2e->second;
2711 edge->_normal = vEdge->_normal;
2712 edge->_lenFactor = vEdge->_lenFactor;
2713 edge->_cosin = vEdge->_cosin;
2716 } // loop on data._edgesOnShape._edges
2717 } // loop on data._edgesOnShape
2719 // fix _LayerEdge::_2neibors on EDGEs to smooth
2720 // map< TGeomID,Handle(Geom_Curve)>::iterator e2c = data._edge2curve.begin();
2721 // for ( ; e2c != data._edge2curve.end(); ++e2c )
2722 // if ( !e2c->second.IsNull() )
2724 // if ( _EdgesOnShape* eos = data.GetShapeEdges( e2c->first ))
2725 // data.Sort2NeiborsOnEdge( eos->_edges );
2732 //================================================================================
2734 * \brief Compute inflation step size by min size of element on a convex surface
2736 //================================================================================
2738 void _ViscousBuilder::limitStepSize( _SolidData& data,
2739 const SMDS_MeshElement* face,
2740 const _LayerEdge* maxCosinEdge )
2743 double minSize = 10 * data._stepSize;
2744 const int nbNodes = face->NbCornerNodes();
2745 for ( int i = 0; i < nbNodes; ++i )
2747 const SMDS_MeshNode* nextN = face->GetNode( SMESH_MesherHelper::WrapIndex( i+1, nbNodes ));
2748 const SMDS_MeshNode* curN = face->GetNode( i );
2749 if ( nextN->GetPosition()->GetTypeOfPosition() == SMDS_TOP_FACE ||
2750 curN-> GetPosition()->GetTypeOfPosition() == SMDS_TOP_FACE )
2752 double dist = SMESH_TNodeXYZ( curN ).Distance( nextN );
2753 if ( dist < minSize )
2754 minSize = dist, iN = i;
2757 double newStep = 0.8 * minSize / maxCosinEdge->_lenFactor;
2758 if ( newStep < data._stepSize )
2760 data._stepSize = newStep;
2761 data._stepSizeCoeff = 0.8 / maxCosinEdge->_lenFactor;
2762 data._stepSizeNodes[0] = face->GetNode( iN );
2763 data._stepSizeNodes[1] = face->GetNode( SMESH_MesherHelper::WrapIndex( iN+1, nbNodes ));
2767 //================================================================================
2769 * \brief Compute inflation step size by min size of element on a convex surface
2771 //================================================================================
2773 void _ViscousBuilder::limitStepSize( _SolidData& data, const double minSize )
2775 if ( minSize < data._stepSize )
2777 data._stepSize = minSize;
2778 if ( data._stepSizeNodes[0] )
2781 SMESH_TNodeXYZ(data._stepSizeNodes[0]).Distance(data._stepSizeNodes[1]);
2782 data._stepSizeCoeff = data._stepSize / dist;
2787 //================================================================================
2789 * \brief Limit data._stepSize by evaluating curvature of shapes and fill data._convexFaces
2791 //================================================================================
2793 void _ViscousBuilder::limitStepSizeByCurvature( _SolidData& data )
2795 SMESH_MesherHelper helper( *_mesh );
2797 BRepLProp_SLProps surfProp( 2, 1e-6 );
2798 data._convexFaces.clear();
2800 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
2802 _EdgesOnShape& eof = data._edgesOnShape[iS];
2803 if ( eof.ShapeType() != TopAbs_FACE ||
2804 data._ignoreFaceIds.count( eof._shapeID ))
2807 TopoDS_Face F = TopoDS::Face( eof._shape );
2808 const TGeomID faceID = eof._shapeID;
2810 BRepAdaptor_Surface surface( F, false );
2811 surfProp.SetSurface( surface );
2813 _ConvexFace cnvFace;
2815 cnvFace._normalsFixed = false;
2816 cnvFace._isTooCurved = false;
2818 double maxCurvature = cnvFace.GetMaxCurvature( data, eof, surfProp, helper );
2819 if ( maxCurvature > 0 )
2821 limitStepSize( data, 0.9 / maxCurvature );
2822 findEdgesToUpdateNormalNearConvexFace( cnvFace, data, helper );
2824 if ( !cnvFace._isTooCurved ) continue;
2826 _ConvexFace & convFace =
2827 data._convexFaces.insert( make_pair( faceID, cnvFace )).first->second;
2829 // skip a closed surface (data._convexFaces is useful anyway)
2830 bool isClosedF = false;
2831 helper.SetSubShape( F );
2832 if ( helper.HasRealSeam() )
2834 // in the closed surface there must be a closed EDGE
2835 for ( TopExp_Explorer eIt( F, TopAbs_EDGE ); eIt.More() && !isClosedF; eIt.Next() )
2836 isClosedF = helper.IsClosedEdge( TopoDS::Edge( eIt.Current() ));
2840 // limit _LayerEdge::_maxLen on the FACE
2841 const double oriFactor = ( F.Orientation() == TopAbs_REVERSED ? +1. : -1. );
2842 const double minCurvature =
2843 1. / ( eof._hyp.GetTotalThickness() * ( 1 + theThickToIntersection ));
2844 map< TGeomID, _EdgesOnShape* >::iterator id2eos = cnvFace._subIdToEOS.find( faceID );
2845 if ( id2eos != cnvFace._subIdToEOS.end() )
2847 _EdgesOnShape& eos = * id2eos->second;
2848 for ( size_t i = 0; i < eos._edges.size(); ++i )
2850 _LayerEdge* ledge = eos._edges[ i ];
2851 gp_XY uv = helper.GetNodeUV( F, ledge->_nodes[0] );
2852 surfProp.SetParameters( uv.X(), uv.Y() );
2853 if ( surfProp.IsCurvatureDefined() )
2855 double curvature = Max( surfProp.MaxCurvature() * oriFactor,
2856 surfProp.MinCurvature() * oriFactor );
2857 if ( curvature > minCurvature )
2858 ledge->_maxLen = Min( ledge->_maxLen, 1. / curvature );
2865 // Fill _ConvexFace::_simplexTestEdges. These _LayerEdge's are used to detect
2866 // prism distortion.
2867 map< TGeomID, _EdgesOnShape* >::iterator id2eos = convFace._subIdToEOS.find( faceID );
2868 if ( id2eos != convFace._subIdToEOS.end() && !id2eos->second->_edges.empty() )
2870 // there are _LayerEdge's on the FACE it-self;
2871 // select _LayerEdge's near EDGEs
2872 _EdgesOnShape& eos = * id2eos->second;
2873 for ( size_t i = 0; i < eos._edges.size(); ++i )
2875 _LayerEdge* ledge = eos._edges[ i ];
2876 for ( size_t j = 0; j < ledge->_simplices.size(); ++j )
2877 if ( ledge->_simplices[j]._nNext->GetPosition()->GetDim() < 2 )
2879 convFace._simplexTestEdges.push_back( ledge );
2886 // where there are no _LayerEdge's on a _ConvexFace,
2887 // as e.g. on a fillet surface with no internal nodes - issue 22580,
2888 // so that collision of viscous internal faces is not detected by check of
2889 // intersection of _LayerEdge's with the viscous internal faces.
2891 set< const SMDS_MeshNode* > usedNodes;
2893 // look for _LayerEdge's with null _sWOL
2894 id2eos = convFace._subIdToEOS.begin();
2895 for ( ; id2eos != convFace._subIdToEOS.end(); ++id2eos )
2897 _EdgesOnShape& eos = * id2eos->second;
2898 if ( !eos._sWOL.IsNull() )
2900 for ( size_t i = 0; i < eos._edges.size(); ++i )
2902 _LayerEdge* ledge = eos._edges[ i ];
2903 const SMDS_MeshNode* srcNode = ledge->_nodes[0];
2904 if ( !usedNodes.insert( srcNode ).second ) continue;
2906 for ( size_t i = 0; i < ledge->_simplices.size(); ++i )
2908 usedNodes.insert( ledge->_simplices[i]._nPrev );
2909 usedNodes.insert( ledge->_simplices[i]._nNext );
2911 convFace._simplexTestEdges.push_back( ledge );
2915 } // loop on FACEs of data._solid
2918 //================================================================================
2920 * \brief Detect shapes (and _LayerEdge's on them) to smooth
2922 //================================================================================
2924 bool _ViscousBuilder::findShapesToSmooth( _SolidData& data )
2926 // define allowed thickness
2927 computeGeomSize( data ); // compute data._geomSize and _LayerEdge::_maxLen
2929 data._maxThickness = 0;
2930 data._minThickness = 1e100;
2931 list< const StdMeshers_ViscousLayers* >::iterator hyp = data._hyps.begin();
2932 for ( ; hyp != data._hyps.end(); ++hyp )
2934 data._maxThickness = Max( data._maxThickness, (*hyp)->GetTotalThickness() );
2935 data._minThickness = Min( data._minThickness, (*hyp)->GetTotalThickness() );
2937 //const double tgtThick = /*Min( 0.5 * data._geomSize, */data._maxThickness;
2939 // Find shapes needing smoothing; such a shape has _LayerEdge._normal on it's
2940 // boundary inclined to the shape at a sharp angle
2942 //list< TGeomID > shapesToSmooth;
2943 TopTools_MapOfShape edgesOfSmooFaces;
2945 SMESH_MesherHelper helper( *_mesh );
2948 vector< _EdgesOnShape >& edgesByGeom = data._edgesOnShape;
2949 data._nbShapesToSmooth = 0;
2951 for ( size_t iS = 0; iS < edgesByGeom.size(); ++iS ) // check FACEs
2953 _EdgesOnShape& eos = edgesByGeom[iS];
2954 eos._toSmooth = false;
2955 if ( eos._edges.empty() || eos.ShapeType() != TopAbs_FACE )
2958 double tgtThick = eos._hyp.GetTotalThickness();
2959 TopExp_Explorer eExp( edgesByGeom[iS]._shape, TopAbs_EDGE );
2960 for ( ; eExp.More() && !eos._toSmooth; eExp.Next() )
2962 TGeomID iE = getMeshDS()->ShapeToIndex( eExp.Current() );
2963 vector<_LayerEdge*>& eE = edgesByGeom[ iE ]._edges;
2964 if ( eE.empty() ) continue;
2967 for ( size_t i = 0; i < eE.size() && !eos._toSmooth; ++i )
2968 if ( eE[i]->_cosin > theMinSmoothCosin )
2970 SMDS_ElemIteratorPtr fIt = eE[i]->_nodes[0]->GetInverseElementIterator(SMDSAbs_Face);
2971 while ( fIt->more() && !eos._toSmooth )
2973 const SMDS_MeshElement* face = fIt->next();
2974 if ( face->getshapeId() == eos._shapeID &&
2975 getDistFromEdge( face, eE[i]->_nodes[0], faceSize ))
2977 eos._toSmooth = needSmoothing( eE[i]->_cosin, tgtThick, faceSize );
2982 if ( eos._toSmooth )
2984 for ( eExp.ReInit(); eExp.More(); eExp.Next() )
2985 edgesOfSmooFaces.Add( eExp.Current() );
2987 data.PrepareEdgesToSmoothOnFace( &edgesByGeom[iS], /*substituteSrcNodes=*/false );
2989 data._nbShapesToSmooth += eos._toSmooth;
2993 for ( size_t iS = 0; iS < edgesByGeom.size(); ++iS ) // check EDGEs
2995 _EdgesOnShape& eos = edgesByGeom[iS];
2996 eos._edgeSmoother = NULL;
2997 if ( eos._edges.empty() || eos.ShapeType() != TopAbs_EDGE ) continue;
2998 if ( !eos._hyp.ToSmooth() ) continue;
3000 const TopoDS_Edge& E = TopoDS::Edge( edgesByGeom[iS]._shape );
3001 if ( SMESH_Algo::isDegenerated( E ) || !edgesOfSmooFaces.Contains( E ))
3004 double tgtThick = eos._hyp.GetTotalThickness();
3005 for ( TopoDS_Iterator vIt( E ); vIt.More() && !eos._toSmooth; vIt.Next() )
3007 TGeomID iV = getMeshDS()->ShapeToIndex( vIt.Value() );
3008 vector<_LayerEdge*>& eV = edgesByGeom[ iV ]._edges;
3009 if ( eV.empty() || eV[0]->Is( _LayerEdge::MULTI_NORMAL )) continue;
3010 gp_Vec eDir = getEdgeDir( E, TopoDS::Vertex( vIt.Value() ));
3011 double angle = eDir.Angle( eV[0]->_normal );
3012 double cosin = Cos( angle );
3013 double cosinAbs = Abs( cosin );
3014 if ( cosinAbs > theMinSmoothCosin )
3016 // always smooth analytic EDGEs
3017 Handle(Geom_Curve) curve = _Smoother1D::CurveForSmooth( E, eos, helper );
3018 eos._toSmooth = ! curve.IsNull();
3020 // compare tgtThick with the length of an end segment
3021 SMDS_ElemIteratorPtr eIt = eV[0]->_nodes[0]->GetInverseElementIterator(SMDSAbs_Edge);
3022 while ( eIt->more() && !eos._toSmooth )
3024 const SMDS_MeshElement* endSeg = eIt->next();
3025 if ( endSeg->getshapeId() == (int) iS )
3028 SMESH_TNodeXYZ( endSeg->GetNode(0) ).Distance( endSeg->GetNode(1 ));
3029 eos._toSmooth = needSmoothing( cosinAbs, tgtThick, segLen );
3032 if ( eos._toSmooth )
3034 eos._edgeSmoother = new _Smoother1D( curve, eos );
3036 // for ( size_t i = 0; i < eos._edges.size(); ++i )
3037 // eos._edges[i]->Set( _LayerEdge::TO_SMOOTH );
3041 data._nbShapesToSmooth += eos._toSmooth;
3045 // Reset _cosin if no smooth is allowed by the user
3046 for ( size_t iS = 0; iS < edgesByGeom.size(); ++iS )
3048 _EdgesOnShape& eos = edgesByGeom[iS];
3049 if ( eos._edges.empty() ) continue;
3051 if ( !eos._hyp.ToSmooth() )
3052 for ( size_t i = 0; i < eos._edges.size(); ++i )
3053 eos._edges[i]->SetCosin( 0 );
3057 // Fill _eosC1 to make that C1 FACEs and EGDEs between them to be smoothed as a whole
3059 TopTools_MapOfShape c1VV;
3061 for ( size_t iS = 0; iS < edgesByGeom.size(); ++iS ) // check FACEs
3063 _EdgesOnShape& eos = edgesByGeom[iS];
3064 if ( eos._edges.empty() ||
3065 eos.ShapeType() != TopAbs_FACE ||
3069 // check EDGEs of a FACE
3070 TopTools_MapOfShape checkedEE, allVV;
3071 list< SMESH_subMesh* > smQueue( 1, eos._subMesh ); // sm of FACEs
3072 while ( !smQueue.empty() )
3074 SMESH_subMesh* sm = smQueue.front();
3075 smQueue.pop_front();
3076 SMESH_subMeshIteratorPtr smIt = sm->getDependsOnIterator(/*includeSelf=*/false);
3077 while ( smIt->more() )
3080 if ( sm->GetSubShape().ShapeType() == TopAbs_VERTEX )
3081 allVV.Add( sm->GetSubShape() );
3082 if ( sm->GetSubShape().ShapeType() != TopAbs_EDGE ||
3083 !checkedEE.Add( sm->GetSubShape() ))
3086 _EdgesOnShape* eoe = data.GetShapeEdges( sm->GetId() );
3087 vector<_LayerEdge*>& eE = eoe->_edges;
3088 if ( eE.empty() || !eoe->_sWOL.IsNull() )
3091 bool isC1 = true; // check continuity along an EDGE
3092 for ( size_t i = 0; i < eE.size() && isC1; ++i )
3093 isC1 = ( Abs( eE[i]->_cosin ) < theMinSmoothCosin );
3097 // check that mesh faces are C1 as well
3099 gp_XYZ norm1, norm2;
3100 const SMDS_MeshNode* n = eE[ eE.size() / 2 ]->_nodes[0];
3101 SMDS_ElemIteratorPtr fIt = n->GetInverseElementIterator(SMDSAbs_Face);
3102 if ( !SMESH_MeshAlgos::FaceNormal( fIt->next(), norm1, /*normalized=*/true ))
3104 while ( fIt->more() && isC1 )
3105 isC1 = ( SMESH_MeshAlgos::FaceNormal( fIt->next(), norm2, /*normalized=*/true ) &&
3106 Abs( norm1 * norm2 ) >= ( 1. - theMinSmoothCosin ));
3111 // add the EDGE and an adjacent FACE to _eosC1
3112 PShapeIteratorPtr fIt = helper.GetAncestors( sm->GetSubShape(), *_mesh, TopAbs_FACE );
3113 while ( const TopoDS_Shape* face = fIt->next() )
3115 _EdgesOnShape* eof = data.GetShapeEdges( *face );
3116 if ( !eof ) continue; // other solid
3117 if ( !eos.HasC1( eoe ))
3119 eos._eosC1.push_back( eoe );
3120 eoe->_toSmooth = false;
3121 data.PrepareEdgesToSmoothOnFace( eoe, /*substituteSrcNodes=*/false );
3123 if ( eos._shapeID != eof->_shapeID && !eos.HasC1( eof ))
3125 eos._eosC1.push_back( eof );
3126 eof->_toSmooth = false;
3127 data.PrepareEdgesToSmoothOnFace( eof, /*substituteSrcNodes=*/false );
3128 smQueue.push_back( eof->_subMesh );
3133 if ( eos._eosC1.empty() )
3136 // check VERTEXes of C1 FACEs
3137 TopTools_MapIteratorOfMapOfShape vIt( allVV );
3138 for ( ; vIt.More(); vIt.Next() )
3140 _EdgesOnShape* eov = data.GetShapeEdges( vIt.Key() );
3141 if ( !eov || eov->_edges.empty() || !eov->_sWOL.IsNull() )
3144 bool isC1 = true; // check if all adjacent FACEs are in eos._eosC1
3145 PShapeIteratorPtr fIt = helper.GetAncestors( vIt.Key(), *_mesh, TopAbs_FACE );
3146 while ( const TopoDS_Shape* face = fIt->next() )
3148 _EdgesOnShape* eof = data.GetShapeEdges( *face );
3149 if ( !eof ) continue; // other solid
3150 isC1 = ( face->IsSame( eos._shape ) || eos.HasC1( eof ));
3156 eos._eosC1.push_back( eov );
3157 data.PrepareEdgesToSmoothOnFace( eov, /*substituteSrcNodes=*/false );
3158 c1VV.Add( eov->_shape );
3162 } // fill _eosC1 of FACEs
3167 vector< pair< _EdgesOnShape*, gp_XYZ > > dirOfEdges;
3169 for ( size_t iS = 0; iS < edgesByGeom.size(); ++iS ) // check VERTEXes
3171 _EdgesOnShape& eov = edgesByGeom[iS];
3172 if ( eov._edges.empty() ||
3173 eov.ShapeType() != TopAbs_VERTEX ||
3174 c1VV.Contains( eov._shape ))
3176 const TopoDS_Vertex& V = TopoDS::Vertex( eov._shape );
3178 // get directions of surrounding EDGEs
3180 PShapeIteratorPtr fIt = helper.GetAncestors( eov._shape, *_mesh, TopAbs_EDGE );
3181 while ( const TopoDS_Shape* e = fIt->next() )
3183 _EdgesOnShape* eoe = data.GetShapeEdges( *e );
3184 if ( !eoe ) continue; // other solid
3185 gp_XYZ eDir = getEdgeDir( TopoDS::Edge( *e ), V );
3186 if ( !Precision::IsInfinite( eDir.X() ))
3187 dirOfEdges.push_back( make_pair( eoe, eDir.Normalized() ));
3190 // find EDGEs with C1 directions
3191 for ( size_t i = 0; i < dirOfEdges.size(); ++i )
3192 for ( size_t j = i+1; j < dirOfEdges.size(); ++j )
3193 if ( dirOfEdges[i].first && dirOfEdges[j].first )
3195 double dot = dirOfEdges[i].second * dirOfEdges[j].second;
3196 bool isC1 = ( dot < - ( 1. - theMinSmoothCosin ));
3199 double maxEdgeLen = 3 * Min( eov._edges[0]->_maxLen, eov._hyp.GetTotalThickness() );
3200 double eLen1 = SMESH_Algo::EdgeLength( TopoDS::Edge( dirOfEdges[i].first->_shape ));
3201 double eLen2 = SMESH_Algo::EdgeLength( TopoDS::Edge( dirOfEdges[j].first->_shape ));
3202 if ( eLen1 < maxEdgeLen ) eov._eosC1.push_back( dirOfEdges[i].first );
3203 if ( eLen2 < maxEdgeLen ) eov._eosC1.push_back( dirOfEdges[j].first );
3204 dirOfEdges[i].first = 0;
3205 dirOfEdges[j].first = 0;
3208 } // fill _eosC1 of VERTEXes
3215 //================================================================================
3217 * \brief initialize data of _EdgesOnShape
3219 //================================================================================
3221 void _ViscousBuilder::setShapeData( _EdgesOnShape& eos,
3225 if ( !eos._shape.IsNull() ||
3226 sm->GetSubShape().ShapeType() == TopAbs_WIRE )
3229 SMESH_MesherHelper helper( *_mesh );
3232 eos._shapeID = sm->GetId();
3233 eos._shape = sm->GetSubShape();
3234 if ( eos.ShapeType() == TopAbs_FACE )
3235 eos._shape.Orientation( helper.GetSubShapeOri( data._solid, eos._shape ));
3236 eos._toSmooth = false;
3240 map< TGeomID, TopoDS_Shape >::const_iterator s2s =
3241 data._shrinkShape2Shape.find( eos._shapeID );
3242 if ( s2s != data._shrinkShape2Shape.end() )
3243 eos._sWOL = s2s->second;
3245 eos._isRegularSWOL = true;
3246 if ( eos.SWOLType() == TopAbs_FACE )
3248 const TopoDS_Face& F = TopoDS::Face( eos._sWOL );
3249 Handle(ShapeAnalysis_Surface) surface = helper.GetSurface( F );
3250 eos._isRegularSWOL = ( ! surface->HasSingularities( 1e-7 ));
3254 if ( data._hyps.size() == 1 )
3256 eos._hyp = data._hyps.back();
3260 // compute average StdMeshers_ViscousLayers parameters
3261 map< TGeomID, const StdMeshers_ViscousLayers* >::iterator f2hyp;
3262 if ( eos.ShapeType() == TopAbs_FACE )
3264 if (( f2hyp = data._face2hyp.find( eos._shapeID )) != data._face2hyp.end() )
3265 eos._hyp = f2hyp->second;
3269 PShapeIteratorPtr fIt = helper.GetAncestors( eos._shape, *_mesh, TopAbs_FACE );
3270 while ( const TopoDS_Shape* face = fIt->next() )
3272 TGeomID faceID = getMeshDS()->ShapeToIndex( *face );
3273 if (( f2hyp = data._face2hyp.find( faceID )) != data._face2hyp.end() )
3274 eos._hyp.Add( f2hyp->second );
3280 if ( ! eos._hyp.UseSurfaceNormal() )
3282 if ( eos.ShapeType() == TopAbs_FACE ) // get normals to elements on a FACE
3284 SMESHDS_SubMesh* smDS = sm->GetSubMeshDS();
3285 eos._faceNormals.resize( smDS->NbElements() );
3287 SMDS_ElemIteratorPtr eIt = smDS->GetElements();
3288 for ( int iF = 0; eIt->more(); ++iF )
3290 const SMDS_MeshElement* face = eIt->next();
3291 if ( !SMESH_MeshAlgos::FaceNormal( face, eos._faceNormals[iF], /*normalized=*/true ))
3292 eos._faceNormals[iF].SetCoord( 0,0,0 );
3295 if ( !helper.IsReversedSubMesh( TopoDS::Face( eos._shape )))
3296 for ( size_t iF = 0; iF < eos._faceNormals.size(); ++iF )
3297 eos._faceNormals[iF].Reverse();
3299 else // find EOS of adjacent FACEs
3301 PShapeIteratorPtr fIt = helper.GetAncestors( eos._shape, *_mesh, TopAbs_FACE );
3302 while ( const TopoDS_Shape* face = fIt->next() )
3304 TGeomID faceID = getMeshDS()->ShapeToIndex( *face );
3305 eos._faceEOS.push_back( & data._edgesOnShape[ faceID ]);
3306 if ( eos._faceEOS.back()->_shape.IsNull() )
3307 // avoid using uninitialised _shapeID in GetNormal()
3308 eos._faceEOS.back()->_shapeID = faceID;
3314 //================================================================================
3316 * \brief Returns normal of a face
3318 //================================================================================
3320 bool _EdgesOnShape::GetNormal( const SMDS_MeshElement* face, gp_Vec& norm )
3323 const _EdgesOnShape* eos = 0;
3325 if ( face->getshapeId() == _shapeID )
3331 for ( size_t iF = 0; iF < _faceEOS.size() && !eos; ++iF )
3332 if ( face->getshapeId() == _faceEOS[ iF ]->_shapeID )
3333 eos = _faceEOS[ iF ];
3337 ( ok = ( face->getIdInShape() < (int) eos->_faceNormals.size() )))
3339 norm = eos->_faceNormals[ face->getIdInShape() ];
3343 debugMsg( "_EdgesOnShape::Normal() failed for face "<<face->GetID()
3344 << " on _shape #" << _shapeID );
3350 //================================================================================
3352 * \brief Set data of _LayerEdge needed for smoothing
3354 //================================================================================
3356 bool _ViscousBuilder::setEdgeData(_LayerEdge& edge,
3358 SMESH_MesherHelper& helper,
3361 const SMDS_MeshNode* node = edge._nodes[0]; // source node
3364 edge._maxLen = Precision::Infinite();
3367 edge._curvature = 0;
3370 // --------------------------
3371 // Compute _normal and _cosin
3372 // --------------------------
3375 edge._lenFactor = 1.;
3376 edge._normal.SetCoord(0,0,0);
3377 _Simplex::GetSimplices( node, edge._simplices, data._ignoreFaceIds, &data );
3379 int totalNbFaces = 0;
3381 std::pair< TopoDS_Face, gp_XYZ > face2Norm[20];
3385 const bool onShrinkShape = !eos._sWOL.IsNull();
3386 const bool useGeometry = (( eos._hyp.UseSurfaceNormal() ) ||
3387 ( eos.ShapeType() != TopAbs_FACE /*&& !onShrinkShape*/ ));
3389 // get geom FACEs the node lies on
3390 //if ( useGeometry )
3392 set<TGeomID> faceIds;
3393 if ( eos.ShapeType() == TopAbs_FACE )
3395 faceIds.insert( eos._shapeID );
3399 SMDS_ElemIteratorPtr fIt = node->GetInverseElementIterator(SMDSAbs_Face);
3400 while ( fIt->more() )
3401 faceIds.insert( fIt->next()->getshapeId() );
3403 set<TGeomID>::iterator id = faceIds.begin();
3404 for ( ; id != faceIds.end(); ++id )
3406 const TopoDS_Shape& s = getMeshDS()->IndexToShape( *id );
3407 if ( s.IsNull() || s.ShapeType() != TopAbs_FACE || data._ignoreFaceIds.count( *id ))
3409 F = TopoDS::Face( s );
3410 face2Norm[ totalNbFaces ].first = F;
3416 bool fromVonF = false;
3419 fromVonF = ( eos.ShapeType() == TopAbs_VERTEX &&
3420 eos.SWOLType() == TopAbs_FACE &&
3423 if ( onShrinkShape && !fromVonF ) // one of faces the node is on has no layers
3425 if ( eos.SWOLType() == TopAbs_EDGE )
3427 // inflate from VERTEX along EDGE
3428 edge._normal = getEdgeDir( TopoDS::Edge( eos._sWOL ), TopoDS::Vertex( eos._shape ));
3430 else if ( eos.ShapeType() == TopAbs_VERTEX )
3432 // inflate from VERTEX along FACE
3433 edge._normal = getFaceDir( TopoDS::Face( eos._sWOL ), TopoDS::Vertex( eos._shape ),
3434 node, helper, normOK, &edge._cosin);
3438 // inflate from EDGE along FACE
3439 edge._normal = getFaceDir( TopoDS::Face( eos._sWOL ), TopoDS::Edge( eos._shape ),
3440 node, helper, normOK);
3443 else // layers are on all FACEs of SOLID the node is on (or fromVonF)
3446 face2Norm[ totalNbFaces++ ].first = TopoDS::Face( eos._sWOL );
3449 for ( int iF = totalNbFaces - 1; iF >= 0; --iF )
3451 F = face2Norm[ iF ].first;
3452 geomNorm = getFaceNormal( node, F, helper, normOK );
3453 if ( !normOK ) continue;
3456 if ( helper.GetSubShapeOri( data._solid, F ) != TopAbs_REVERSED )
3458 face2Norm[ iF ].second = geomNorm.XYZ();
3459 edge._normal += geomNorm.XYZ();
3461 if ( nbOkNorms == 0 )
3462 return error(SMESH_Comment("Can't get normal to node ") << node->GetID(), data._index);
3464 if ( totalNbFaces >= 3 )
3466 edge._normal = getNormalByOffset( &edge, face2Norm, totalNbFaces, fromVonF );
3469 if ( edge._normal.Modulus() < 1e-3 && nbOkNorms > 1 )
3471 // opposite normals, re-get normals at shifted positions (IPAL 52426)
3472 edge._normal.SetCoord( 0,0,0 );
3473 for ( int iF = 0; iF < totalNbFaces - fromVonF; ++iF )
3475 const TopoDS_Face& F = face2Norm[iF].first;
3476 geomNorm = getFaceNormal( node, F, helper, normOK, /*shiftInside=*/true );
3477 if ( helper.GetSubShapeOri( data._solid, F ) != TopAbs_REVERSED )
3480 face2Norm[ iF ].second = geomNorm.XYZ();
3481 edge._normal += face2Norm[ iF ].second;
3486 else // !useGeometry - get _normal using surrounding mesh faces
3488 edge._normal = getWeigthedNormal( &edge );
3490 // set<TGeomID> faceIds;
3492 // SMDS_ElemIteratorPtr fIt = node->GetInverseElementIterator(SMDSAbs_Face);
3493 // while ( fIt->more() )
3495 // const SMDS_MeshElement* face = fIt->next();
3496 // if ( eos.GetNormal( face, geomNorm ))
3498 // if ( onShrinkShape && !faceIds.insert( face->getshapeId() ).second )
3499 // continue; // use only one mesh face on FACE
3500 // edge._normal += geomNorm.XYZ();
3507 //if ( eos._hyp.UseSurfaceNormal() )
3509 switch ( eos.ShapeType() )
3516 TopoDS_Edge E = TopoDS::Edge( eos._shape );
3517 gp_Vec inFaceDir = getFaceDir( F, E, node, helper, normOK );
3518 double angle = inFaceDir.Angle( edge._normal ); // [0,PI]
3519 edge._cosin = Cos( angle );
3522 case TopAbs_VERTEX: {
3525 getFaceDir( TopoDS::Face( eos._sWOL ), TopoDS::Vertex( eos._shape ),
3526 node, helper, normOK, &edge._cosin );
3528 else if ( eos.SWOLType() != TopAbs_FACE ) // else _cosin is set by getFaceDir()
3530 TopoDS_Vertex V = TopoDS::Vertex( eos._shape );
3531 gp_Vec inFaceDir = getFaceDir( F, V, node, helper, normOK );
3532 double angle = inFaceDir.Angle( edge._normal ); // [0,PI]
3533 edge._cosin = Cos( angle );
3534 if ( totalNbFaces > 2 || helper.IsSeamShape( node->getshapeId() ))
3535 for ( int iF = 1; iF < totalNbFaces; ++iF )
3537 F = face2Norm[ iF ].first;
3538 inFaceDir = getFaceDir( F, V, node, helper, normOK=true );
3540 double angle = inFaceDir.Angle( edge._normal );
3541 double cosin = Cos( angle );
3542 if ( Abs( cosin ) > Abs( edge._cosin ))
3543 edge._cosin = cosin;
3550 return error(SMESH_Comment("Invalid shape position of node ")<<node, data._index);
3554 double normSize = edge._normal.SquareModulus();
3555 if ( normSize < numeric_limits<double>::min() )
3556 return error(SMESH_Comment("Bad normal at node ")<< node->GetID(), data._index );
3558 edge._normal /= sqrt( normSize );
3560 if ( edge.Is( _LayerEdge::MULTI_NORMAL ) && edge._nodes.size() == 2 )
3562 getMeshDS()->RemoveFreeNode( edge._nodes.back(), 0, /*fromGroups=*/false );
3563 edge._nodes.resize( 1 );
3564 edge._normal.SetCoord( 0,0,0 );
3568 // Set the rest data
3569 // --------------------
3571 edge.SetCosin( edge._cosin ); // to update edge._lenFactor
3573 if ( onShrinkShape )
3575 const SMDS_MeshNode* tgtNode = edge._nodes.back();
3576 if ( SMESHDS_SubMesh* sm = getMeshDS()->MeshElements( data._solid ))
3577 sm->RemoveNode( tgtNode , /*isNodeDeleted=*/false );
3579 // set initial position which is parameters on _sWOL in this case
3580 if ( eos.SWOLType() == TopAbs_EDGE )
3582 double u = helper.GetNodeU( TopoDS::Edge( eos._sWOL ), node, 0, &normOK );
3583 edge._pos.push_back( gp_XYZ( u, 0, 0 ));
3584 if ( edge._nodes.size() > 1 )
3585 getMeshDS()->SetNodeOnEdge( tgtNode, TopoDS::Edge( eos._sWOL ), u );
3587 else // eos.SWOLType() == TopAbs_FACE
3589 gp_XY uv = helper.GetNodeUV( TopoDS::Face( eos._sWOL ), node, 0, &normOK );
3590 edge._pos.push_back( gp_XYZ( uv.X(), uv.Y(), 0));
3591 if ( edge._nodes.size() > 1 )
3592 getMeshDS()->SetNodeOnFace( tgtNode, TopoDS::Face( eos._sWOL ), uv.X(), uv.Y() );
3595 if ( edge._nodes.size() > 1 )
3597 // check if an angle between a FACE with layers and SWOL is sharp,
3598 // else the edge should not inflate
3600 for ( int iF = 0; iF < totalNbFaces && F.IsNull(); ++iF ) // find a FACE with VL
3601 if ( ! helper.IsSubShape( eos._sWOL, face2Norm[iF].first ))
3602 F = face2Norm[iF].first;
3605 geomNorm = getFaceNormal( node, F, helper, normOK );
3606 if ( helper.GetSubShapeOri( data._solid, F ) != TopAbs_REVERSED )
3607 geomNorm.Reverse(); // inside the SOLID
3608 if ( geomNorm * edge._normal < -0.001 )
3610 getMeshDS()->RemoveFreeNode( tgtNode, 0, /*fromGroups=*/false );
3611 edge._nodes.resize( 1 );
3613 else if ( edge._lenFactor > 3 )
3615 edge._lenFactor = 2;
3616 edge.Set( _LayerEdge::RISKY_SWOL );
3623 edge._pos.push_back( SMESH_TNodeXYZ( node ));
3625 if ( eos.ShapeType() == TopAbs_FACE )
3628 for ( size_t i = 0; i < edge._simplices.size(); ++i )
3630 edge._simplices[i].IsMinAngleOK( edge._pos.back(), angle );
3631 edge._minAngle = Max( edge._minAngle, angle ); // "angle" is actually cosine
3636 // Set neighbor nodes for a _LayerEdge based on EDGE
3638 if ( eos.ShapeType() == TopAbs_EDGE /*||
3639 ( onShrinkShape && posType == SMDS_TOP_VERTEX && fabs( edge._cosin ) < 1e-10 )*/)
3641 edge._2neibors = new _2NearEdges;
3642 // target nodes instead of source ones will be set later
3648 //================================================================================
3650 * \brief Return normal to a FACE at a node
3651 * \param [in] n - node
3652 * \param [in] face - FACE
3653 * \param [in] helper - helper
3654 * \param [out] isOK - true or false
3655 * \param [in] shiftInside - to find normal at a position shifted inside the face
3656 * \return gp_XYZ - normal
3658 //================================================================================
3660 gp_XYZ _ViscousBuilder::getFaceNormal(const SMDS_MeshNode* node,
3661 const TopoDS_Face& face,
3662 SMESH_MesherHelper& helper,
3669 // get a shifted position
3670 gp_Pnt p = SMESH_TNodeXYZ( node );
3671 gp_XYZ shift( 0,0,0 );
3672 TopoDS_Shape S = helper.GetSubShapeByNode( node, helper.GetMeshDS() );
3673 switch ( S.ShapeType() ) {
3676 shift = getFaceDir( face, TopoDS::Vertex( S ), node, helper, isOK );
3681 shift = getFaceDir( face, TopoDS::Edge( S ), node, helper, isOK );
3689 p.Translate( shift * 1e-5 );
3691 TopLoc_Location loc;
3692 GeomAPI_ProjectPointOnSurf& projector = helper.GetProjector( face, loc, 1e-7 );
3694 if ( !loc.IsIdentity() ) p.Transform( loc.Transformation().Inverted() );
3696 projector.Perform( p );
3697 if ( !projector.IsDone() || projector.NbPoints() < 1 )
3702 Quantity_Parameter U,V;
3703 projector.LowerDistanceParameters(U,V);
3708 uv = helper.GetNodeUV( face, node, 0, &isOK );
3714 Handle(Geom_Surface) surface = BRep_Tool::Surface( face );
3716 if ( !shiftInside &&
3717 helper.IsDegenShape( node->getshapeId() ) &&
3718 getFaceNormalAtSingularity( uv, face, helper, normal ))
3721 return normal.XYZ();
3724 int pointKind = GeomLib::NormEstim( surface, uv, 1e-5, normal );
3725 enum { REGULAR = 0, QUASYSINGULAR, CONICAL, IMPOSSIBLE };
3727 if ( pointKind == IMPOSSIBLE &&
3728 node->GetPosition()->GetDim() == 2 ) // node inside the FACE
3730 // probably NormEstim() failed due to a too high tolerance
3731 pointKind = GeomLib::NormEstim( surface, uv, 1e-20, normal );
3732 isOK = ( pointKind < IMPOSSIBLE );
3734 if ( pointKind < IMPOSSIBLE )
3736 if ( pointKind != REGULAR &&
3738 node->GetPosition()->GetDim() < 2 ) // FACE boundary
3740 gp_XYZ normShift = getFaceNormal( node, face, helper, isOK, /*shiftInside=*/true );
3741 if ( normShift * normal.XYZ() < 0. )
3747 if ( !isOK ) // hard singularity, to call with shiftInside=true ?
3749 const TGeomID faceID = helper.GetMeshDS()->ShapeToIndex( face );
3751 SMDS_ElemIteratorPtr fIt = node->GetInverseElementIterator(SMDSAbs_Face);
3752 while ( fIt->more() )
3754 const SMDS_MeshElement* f = fIt->next();
3755 if ( f->getshapeId() == faceID )
3757 isOK = SMESH_MeshAlgos::FaceNormal( f, (gp_XYZ&) normal.XYZ(), /*normalized=*/true );
3760 TopoDS_Face ff = face;
3761 ff.Orientation( TopAbs_FORWARD );
3762 if ( helper.IsReversedSubMesh( ff ))
3769 return normal.XYZ();
3772 //================================================================================
3774 * \brief Try to get normal at a singularity of a surface basing on it's nature
3776 //================================================================================
3778 bool _ViscousBuilder::getFaceNormalAtSingularity( const gp_XY& uv,
3779 const TopoDS_Face& face,
3780 SMESH_MesherHelper& helper,
3783 BRepAdaptor_Surface surface( face );
3785 if ( !getRovolutionAxis( surface, axis ))
3788 double f,l, d, du, dv;
3789 f = surface.FirstUParameter();
3790 l = surface.LastUParameter();
3791 d = ( uv.X() - f ) / ( l - f );
3792 du = ( d < 0.5 ? +1. : -1 ) * 1e-5 * ( l - f );
3793 f = surface.FirstVParameter();
3794 l = surface.LastVParameter();
3795 d = ( uv.Y() - f ) / ( l - f );
3796 dv = ( d < 0.5 ? +1. : -1 ) * 1e-5 * ( l - f );
3799 gp_Pnt2d testUV = uv;
3800 enum { REGULAR = 0, QUASYSINGULAR, CONICAL, IMPOSSIBLE };
3802 Handle(Geom_Surface) geomsurf = surface.Surface().Surface();
3803 for ( int iLoop = 0; true ; ++iLoop )
3805 testUV.SetCoord( testUV.X() + du, testUV.Y() + dv );
3806 if ( GeomLib::NormEstim( geomsurf, testUV, tol, refDir ) == REGULAR )
3813 if ( axis * refDir < 0. )
3821 //================================================================================
3823 * \brief Return a normal at a node weighted with angles taken by faces
3825 //================================================================================
3827 gp_XYZ _ViscousBuilder::getWeigthedNormal( const _LayerEdge* edge )
3829 const SMDS_MeshNode* n = edge->_nodes[0];
3831 gp_XYZ resNorm(0,0,0);
3832 SMESH_TNodeXYZ p0( n ), pP, pN;
3833 for ( size_t i = 0; i < edge->_simplices.size(); ++i )
3835 pP.Set( edge->_simplices[i]._nPrev );
3836 pN.Set( edge->_simplices[i]._nNext );
3837 gp_Vec v0P( p0, pP ), v0N( p0, pN ), vPN( pP, pN ), norm = v0P ^ v0N;
3838 double l0P = v0P.SquareMagnitude();
3839 double l0N = v0N.SquareMagnitude();
3840 double lPN = vPN.SquareMagnitude();
3841 if ( l0P < std::numeric_limits<double>::min() ||
3842 l0N < std::numeric_limits<double>::min() ||
3843 lPN < std::numeric_limits<double>::min() )
3845 double lNorm = norm.SquareMagnitude();
3846 double sin2 = lNorm / l0P / l0N;
3847 double angle = ACos(( v0P * v0N ) / Sqrt( l0P ) / Sqrt( l0N ));
3849 double weight = sin2 * angle / lPN;
3850 resNorm += weight * norm.XYZ() / Sqrt( lNorm );
3856 //================================================================================
3858 * \brief Return a normal at a node by getting a common point of offset planes
3859 * defined by the FACE normals
3861 //================================================================================
3863 gp_XYZ _ViscousBuilder::getNormalByOffset( _LayerEdge* edge,
3864 std::pair< TopoDS_Face, gp_XYZ > f2Normal[],
3868 SMESH_TNodeXYZ p0 = edge->_nodes[0];
3870 gp_XYZ resNorm(0,0,0);
3871 TopoDS_Shape V = SMESH_MesherHelper::GetSubShapeByNode( p0._node, getMeshDS() );
3872 if ( V.ShapeType() != TopAbs_VERTEX || nbFaces < 3 )
3874 for ( int i = 0; i < nbFaces; ++i )
3875 resNorm += f2Normal[i].second;
3879 // prepare _OffsetPlane's
3880 vector< _OffsetPlane > pln( nbFaces );
3881 for ( int i = 0; i < nbFaces - lastNoOffset; ++i )
3883 pln[i]._faceIndex = i;
3884 pln[i]._plane = gp_Pln( p0 + f2Normal[i].second, f2Normal[i].second );
3888 pln[ nbFaces - 1 ]._faceIndex = nbFaces - 1;
3889 pln[ nbFaces - 1 ]._plane = gp_Pln( p0, f2Normal[ nbFaces - 1 ].second );
3892 // intersect neighboring OffsetPlane's
3893 PShapeIteratorPtr edgeIt = SMESH_MesherHelper::GetAncestors( V, *_mesh, TopAbs_EDGE );
3894 while ( const TopoDS_Shape* edge = edgeIt->next() )
3896 int f1 = -1, f2 = -1;
3897 for ( int i = 0; i < nbFaces && f2 < 0; ++i )
3898 if ( SMESH_MesherHelper::IsSubShape( *edge, f2Normal[i].first ))
3899 (( f1 < 0 ) ? f1 : f2 ) = i;
3902 pln[ f1 ].ComputeIntersectionLine( pln[ f2 ], TopoDS::Edge( *edge ), TopoDS::Vertex( V ));
3905 // get a common point
3906 gp_XYZ commonPnt( 0, 0, 0 );
3909 for ( int i = 0; i < nbFaces; ++i )
3911 commonPnt += pln[ i ].GetCommonPoint( isPointFound, TopoDS::Vertex( V ));
3912 nbPoints += isPointFound;
3914 gp_XYZ wgtNorm = getWeigthedNormal( edge );
3915 if ( nbPoints == 0 )
3918 commonPnt /= nbPoints;
3919 resNorm = commonPnt - p0;
3923 // choose the best among resNorm and wgtNorm
3924 resNorm.Normalize();
3925 wgtNorm.Normalize();
3926 double resMinDot = std::numeric_limits<double>::max();
3927 double wgtMinDot = std::numeric_limits<double>::max();
3928 for ( int i = 0; i < nbFaces - lastNoOffset; ++i )
3930 resMinDot = Min( resMinDot, resNorm * f2Normal[i].second );
3931 wgtMinDot = Min( wgtMinDot, wgtNorm * f2Normal[i].second );
3934 if ( Max( resMinDot, wgtMinDot ) < theMinSmoothCosin )
3936 edge->Set( _LayerEdge::MULTI_NORMAL );
3939 return ( resMinDot > wgtMinDot ) ? resNorm : wgtNorm;
3942 //================================================================================
3944 * \brief Compute line of intersection of 2 planes
3946 //================================================================================
3948 void _OffsetPlane::ComputeIntersectionLine( _OffsetPlane& pln,
3949 const TopoDS_Edge& E,
3950 const TopoDS_Vertex& V )
3952 int iNext = bool( _faceIndexNext[0] >= 0 );
3953 _faceIndexNext[ iNext ] = pln._faceIndex;
3955 gp_XYZ n1 = _plane.Axis().Direction().XYZ();
3956 gp_XYZ n2 = pln._plane.Axis().Direction().XYZ();
3958 gp_XYZ lineDir = n1 ^ n2;
3960 double x = Abs( lineDir.X() );
3961 double y = Abs( lineDir.Y() );
3962 double z = Abs( lineDir.Z() );
3964 int cooMax; // max coordinate
3966 if (x > z) cooMax = 1;
3970 if (y > z) cooMax = 2;
3975 if ( Abs( lineDir.Coord( cooMax )) < 0.05 )
3977 // parallel planes - intersection is an offset of the common EDGE
3978 gp_Pnt p = BRep_Tool::Pnt( V );
3979 linePos = 0.5 * (( p.XYZ() + n1 ) + ( p.XYZ() + n2 ));
3980 lineDir = getEdgeDir( E, V );
3984 // the constants in the 2 plane equations
3985 double d1 = - ( _plane.Axis().Direction().XYZ() * _plane.Location().XYZ() );
3986 double d2 = - ( pln._plane.Axis().Direction().XYZ() * pln._plane.Location().XYZ() );
3991 linePos.SetY(( d2*n1.Z() - d1*n2.Z()) / lineDir.X() );
3992 linePos.SetZ(( d1*n2.Y() - d2*n1.Y()) / lineDir.X() );
3995 linePos.SetX(( d1*n2.Z() - d2*n1.Z()) / lineDir.Y() );
3997 linePos.SetZ(( d2*n1.X() - d1*n2.X()) / lineDir.Y() );
4000 linePos.SetX(( d2*n1.Y() - d1*n2.Y()) / lineDir.Z() );
4001 linePos.SetY(( d1*n2.X() - d2*n1.X()) / lineDir.Z() );
4005 gp_Lin& line = _lines[ iNext ];
4006 line.SetDirection( lineDir );
4007 line.SetLocation ( linePos );
4009 _isLineOK[ iNext ] = true;
4012 iNext = bool( pln._faceIndexNext[0] >= 0 );
4013 pln._lines [ iNext ] = line;
4014 pln._faceIndexNext[ iNext ] = this->_faceIndex;
4015 pln._isLineOK [ iNext ] = true;
4018 //================================================================================
4020 * \brief Computes intersection point of two _lines
4022 //================================================================================
4024 gp_XYZ _OffsetPlane::GetCommonPoint(bool& isFound,
4025 const TopoDS_Vertex & V) const
4030 if ( NbLines() == 2 )
4032 gp_Vec lPerp0 = _lines[0].Direction().XYZ() ^ _plane.Axis().Direction().XYZ();
4033 double dot01 = lPerp0 * _lines[1].Direction().XYZ();
4034 if ( Abs( dot01 ) > 0.05 )
4036 gp_Vec l0l1 = _lines[1].Location().XYZ() - _lines[0].Location().XYZ();
4037 double u1 = - ( lPerp0 * l0l1 ) / dot01;
4038 p = ( _lines[1].Location().XYZ() + _lines[1].Direction().XYZ() * u1 );
4043 gp_Pnt pV ( BRep_Tool::Pnt( V ));
4044 gp_Vec lv0( _lines[0].Location(), pV ), lv1(_lines[1].Location(), pV );
4045 double dot0( lv0 * _lines[0].Direction() ), dot1( lv1 * _lines[1].Direction() );
4046 p += 0.5 * ( _lines[0].Location().XYZ() + _lines[0].Direction().XYZ() * dot0 );
4047 p += 0.5 * ( _lines[1].Location().XYZ() + _lines[1].Direction().XYZ() * dot1 );
4055 //================================================================================
4057 * \brief Find 2 neigbor nodes of a node on EDGE
4059 //================================================================================
4061 bool _ViscousBuilder::findNeiborsOnEdge(const _LayerEdge* edge,
4062 const SMDS_MeshNode*& n1,
4063 const SMDS_MeshNode*& n2,
4067 const SMDS_MeshNode* node = edge->_nodes[0];
4068 const int shapeInd = eos._shapeID;
4069 SMESHDS_SubMesh* edgeSM = 0;
4070 if ( eos.ShapeType() == TopAbs_EDGE )
4072 edgeSM = eos._subMesh->GetSubMeshDS();
4073 if ( !edgeSM || edgeSM->NbElements() == 0 )
4074 return error(SMESH_Comment("Not meshed EDGE ") << shapeInd, data._index);
4078 SMDS_ElemIteratorPtr eIt = node->GetInverseElementIterator(SMDSAbs_Edge);
4079 while ( eIt->more() && !n2 )
4081 const SMDS_MeshElement* e = eIt->next();
4082 const SMDS_MeshNode* nNeibor = e->GetNode( 0 );
4083 if ( nNeibor == node ) nNeibor = e->GetNode( 1 );
4086 if (!edgeSM->Contains(e)) continue;
4090 TopoDS_Shape s = SMESH_MesherHelper::GetSubShapeByNode( nNeibor, getMeshDS() );
4091 if ( !SMESH_MesherHelper::IsSubShape( s, eos._sWOL )) continue;
4093 ( iN++ ? n2 : n1 ) = nNeibor;
4096 return error(SMESH_Comment("Wrongly meshed EDGE ") << shapeInd, data._index);
4100 //================================================================================
4102 * \brief Set _curvature and _2neibors->_plnNorm by 2 neigbor nodes residing the same EDGE
4104 //================================================================================
4106 void _LayerEdge::SetDataByNeighbors( const SMDS_MeshNode* n1,
4107 const SMDS_MeshNode* n2,
4108 const _EdgesOnShape& eos,
4109 SMESH_MesherHelper& helper)
4111 if ( eos.ShapeType() != TopAbs_EDGE )
4114 gp_XYZ pos = SMESH_TNodeXYZ( _nodes[0] );
4115 gp_XYZ vec1 = pos - SMESH_TNodeXYZ( n1 );
4116 gp_XYZ vec2 = pos - SMESH_TNodeXYZ( n2 );
4120 double sumLen = vec1.Modulus() + vec2.Modulus();
4121 _2neibors->_wgt[0] = 1 - vec1.Modulus() / sumLen;
4122 _2neibors->_wgt[1] = 1 - vec2.Modulus() / sumLen;
4123 double avgNormProj = 0.5 * ( _normal * vec1 + _normal * vec2 );
4124 double avgLen = 0.5 * ( vec1.Modulus() + vec2.Modulus() );
4125 if ( _curvature ) delete _curvature;
4126 _curvature = _Curvature::New( avgNormProj, avgLen );
4127 // if ( _curvature )
4128 // debugMsg( _nodes[0]->GetID()
4129 // << " CURV r,k: " << _curvature->_r<<","<<_curvature->_k
4130 // << " proj = "<<avgNormProj<< " len = " << avgLen << "| lenDelta(0) = "
4131 // << _curvature->lenDelta(0) );
4135 if ( eos._sWOL.IsNull() )
4137 TopoDS_Edge E = TopoDS::Edge( eos._shape );
4138 // if ( SMESH_Algo::isDegenerated( E ))
4140 gp_XYZ dirE = getEdgeDir( E, _nodes[0], helper );
4141 gp_XYZ plnNorm = dirE ^ _normal;
4142 double proj0 = plnNorm * vec1;
4143 double proj1 = plnNorm * vec2;
4144 if ( fabs( proj0 ) > 1e-10 || fabs( proj1 ) > 1e-10 )
4146 if ( _2neibors->_plnNorm ) delete _2neibors->_plnNorm;
4147 _2neibors->_plnNorm = new gp_XYZ( plnNorm.Normalized() );
4152 //================================================================================
4154 * \brief Copy data from a _LayerEdge of other SOLID and based on the same node;
4155 * this and the other _LayerEdge are inflated along a FACE or an EDGE
4157 //================================================================================
4159 gp_XYZ _LayerEdge::Copy( _LayerEdge& other,
4161 SMESH_MesherHelper& helper )
4163 _nodes = other._nodes;
4164 _normal = other._normal;
4166 _lenFactor = other._lenFactor;
4167 _cosin = other._cosin;
4168 _2neibors = other._2neibors;
4169 _curvature = 0; std::swap( _curvature, other._curvature );
4170 _2neibors = 0; std::swap( _2neibors, other._2neibors );
4172 gp_XYZ lastPos( 0,0,0 );
4173 if ( eos.SWOLType() == TopAbs_EDGE )
4175 double u = helper.GetNodeU( TopoDS::Edge( eos._sWOL ), _nodes[0] );
4176 _pos.push_back( gp_XYZ( u, 0, 0));
4178 u = helper.GetNodeU( TopoDS::Edge( eos._sWOL ), _nodes.back() );
4183 gp_XY uv = helper.GetNodeUV( TopoDS::Face( eos._sWOL ), _nodes[0]);
4184 _pos.push_back( gp_XYZ( uv.X(), uv.Y(), 0));
4186 uv = helper.GetNodeUV( TopoDS::Face( eos._sWOL ), _nodes.back() );
4187 lastPos.SetX( uv.X() );
4188 lastPos.SetY( uv.Y() );
4193 //================================================================================
4195 * \brief Set _cosin and _lenFactor
4197 //================================================================================
4199 void _LayerEdge::SetCosin( double cosin )
4202 cosin = Abs( _cosin );
4203 //_lenFactor = ( cosin < 1.-1e-12 ) ? Min( 2., 1./sqrt(1-cosin*cosin )) : 1.0;
4204 _lenFactor = ( cosin < 1.-1e-12 ) ? 1./sqrt(1-cosin*cosin ) : 1.0;
4207 //================================================================================
4209 * \brief Check if another _LayerEdge is a neighbor on EDGE
4211 //================================================================================
4213 bool _LayerEdge::IsNeiborOnEdge( const _LayerEdge* edge ) const
4215 return (( this->_2neibors && this->_2neibors->include( edge )) ||
4216 ( edge->_2neibors && edge->_2neibors->include( this )));
4219 //================================================================================
4221 * \brief Fills a vector<_Simplex >
4223 //================================================================================
4225 void _Simplex::GetSimplices( const SMDS_MeshNode* node,
4226 vector<_Simplex>& simplices,
4227 const set<TGeomID>& ingnoreShapes,
4228 const _SolidData* dataToCheckOri,
4232 SMDS_ElemIteratorPtr fIt = node->GetInverseElementIterator(SMDSAbs_Face);
4233 while ( fIt->more() )
4235 const SMDS_MeshElement* f = fIt->next();
4236 const TGeomID shapeInd = f->getshapeId();
4237 if ( ingnoreShapes.count( shapeInd )) continue;
4238 const int nbNodes = f->NbCornerNodes();
4239 const int srcInd = f->GetNodeIndex( node );
4240 const SMDS_MeshNode* nPrev = f->GetNode( SMESH_MesherHelper::WrapIndex( srcInd-1, nbNodes ));
4241 const SMDS_MeshNode* nNext = f->GetNode( SMESH_MesherHelper::WrapIndex( srcInd+1, nbNodes ));
4242 const SMDS_MeshNode* nOpp = f->GetNode( SMESH_MesherHelper::WrapIndex( srcInd+2, nbNodes ));
4243 if ( dataToCheckOri && dataToCheckOri->_reversedFaceIds.count( shapeInd ))
4244 std::swap( nPrev, nNext );
4245 simplices.push_back( _Simplex( nPrev, nNext, ( nbNodes == 3 ? 0 : nOpp )));
4249 SortSimplices( simplices );
4252 //================================================================================
4254 * \brief Set neighbor simplices side by side
4256 //================================================================================
4258 void _Simplex::SortSimplices(vector<_Simplex>& simplices)
4260 vector<_Simplex> sortedSimplices( simplices.size() );
4261 sortedSimplices[0] = simplices[0];
4263 for ( size_t i = 1; i < simplices.size(); ++i )
4265 for ( size_t j = 1; j < simplices.size(); ++j )
4266 if ( sortedSimplices[i-1]._nNext == simplices[j]._nPrev )
4268 sortedSimplices[i] = simplices[j];
4273 if ( nbFound == simplices.size() - 1 )
4274 simplices.swap( sortedSimplices );
4277 //================================================================================
4279 * \brief DEBUG. Create groups contating temorary data of _LayerEdge's
4281 //================================================================================
4283 void _ViscousBuilder::makeGroupOfLE()
4286 for ( size_t i = 0 ; i < _sdVec.size(); ++i )
4288 if ( _sdVec[i]._n2eMap.empty() ) continue;
4290 dumpFunction( SMESH_Comment("make_LayerEdge_") << i );
4291 TNode2Edge::iterator n2e;
4292 for ( n2e = _sdVec[i]._n2eMap.begin(); n2e != _sdVec[i]._n2eMap.end(); ++n2e )
4294 _LayerEdge* le = n2e->second;
4295 // for ( size_t iN = 1; iN < le->_nodes.size(); ++iN )
4296 // dumpCmd(SMESH_Comment("mesh.AddEdge([ ") <<le->_nodes[iN-1]->GetID()
4297 // << ", " << le->_nodes[iN]->GetID() <<"])");
4299 dumpCmd(SMESH_Comment("mesh.AddEdge([ ") <<le->_nodes[0]->GetID()
4300 << ", " << le->_nodes.back()->GetID() <<"]) # " << le->_flags );
4305 dumpFunction( SMESH_Comment("makeNormals") << i );
4306 for ( n2e = _sdVec[i]._n2eMap.begin(); n2e != _sdVec[i]._n2eMap.end(); ++n2e )
4308 _LayerEdge* edge = n2e->second;
4309 SMESH_TNodeXYZ nXYZ( edge->_nodes[0] );
4310 nXYZ += edge->_normal * _sdVec[i]._stepSize;
4311 dumpCmd(SMESH_Comment("mesh.AddEdge([ ") << edge->_nodes[0]->GetID()
4312 << ", mesh.AddNode( "<< nXYZ.X()<<","<< nXYZ.Y()<<","<< nXYZ.Z()<<")])");
4316 dumpFunction( SMESH_Comment("makeTmpFaces_") << i );
4317 dumpCmd( "faceId1 = mesh.NbElements()" );
4318 TopExp_Explorer fExp( _sdVec[i]._solid, TopAbs_FACE );
4319 for ( ; fExp.More(); fExp.Next() )
4321 if ( const SMESHDS_SubMesh* sm = _sdVec[i]._proxyMesh->GetProxySubMesh( fExp.Current() ))
4323 if ( sm->NbElements() == 0 ) continue;
4324 SMDS_ElemIteratorPtr fIt = sm->GetElements();
4325 while ( fIt->more())
4327 const SMDS_MeshElement* e = fIt->next();
4328 SMESH_Comment cmd("mesh.AddFace([");
4329 for ( int j = 0; j < e->NbCornerNodes(); ++j )
4330 cmd << e->GetNode(j)->GetID() << (j+1 < e->NbCornerNodes() ? ",": "])");
4335 dumpCmd( "faceId2 = mesh.NbElements()" );
4336 dumpCmd( SMESH_Comment( "mesh.MakeGroup( 'tmpFaces_" ) << i << "',"
4337 << "SMESH.FACE, SMESH.FT_RangeOfIds,'=',"
4338 << "'%s-%s' % (faceId1+1, faceId2))");
4344 //================================================================================
4346 * \brief Find maximal _LayerEdge length (layer thickness) limited by geometry
4348 //================================================================================
4350 void _ViscousBuilder::computeGeomSize( _SolidData& data )
4352 data._geomSize = Precision::Infinite();
4353 double intersecDist;
4354 const SMDS_MeshElement* face;
4355 SMESH_MesherHelper helper( *_mesh );
4357 SMESHUtils::Deleter<SMESH_ElementSearcher> searcher
4358 ( SMESH_MeshAlgos::GetElementSearcher( *getMeshDS(),
4359 data._proxyMesh->GetFaces( data._solid )));
4361 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
4363 _EdgesOnShape& eos = data._edgesOnShape[ iS ];
4364 if ( eos._edges.empty() )
4366 // get neighbor faces intersection with which should not be considered since
4367 // collisions are avoided by means of smoothing
4368 set< TGeomID > neighborFaces;
4369 if ( eos._hyp.ToSmooth() )
4371 SMESH_subMeshIteratorPtr subIt =
4372 eos._subMesh->getDependsOnIterator(/*includeSelf=*/eos.ShapeType() != TopAbs_FACE );
4373 while ( subIt->more() )
4375 SMESH_subMesh* sm = subIt->next();
4376 PShapeIteratorPtr fIt = helper.GetAncestors( sm->GetSubShape(), *_mesh, TopAbs_FACE );
4377 while ( const TopoDS_Shape* face = fIt->next() )
4378 neighborFaces.insert( getMeshDS()->ShapeToIndex( *face ));
4381 // find intersections
4382 double thinkness = eos._hyp.GetTotalThickness();
4383 for ( size_t i = 0; i < eos._edges.size(); ++i )
4385 if ( eos._edges[i]->Is( _LayerEdge::BLOCKED )) continue;
4386 eos._edges[i]->_maxLen = thinkness;
4387 eos._edges[i]->FindIntersection( *searcher, intersecDist, data._epsilon, eos, &face );
4388 if ( intersecDist > 0 && face )
4390 data._geomSize = Min( data._geomSize, intersecDist );
4391 if ( !neighborFaces.count( face->getshapeId() ))
4392 eos._edges[i]->_maxLen = Min( thinkness, intersecDist / ( face->GetID() < 0 ? 3. : 2. ));
4398 //================================================================================
4400 * \brief Increase length of _LayerEdge's to reach the required thickness of layers
4402 //================================================================================
4404 bool _ViscousBuilder::inflate(_SolidData& data)
4406 SMESH_MesherHelper helper( *_mesh );
4408 // Limit inflation step size by geometry size found by itersecting
4409 // normals of _LayerEdge's with mesh faces
4410 if ( data._stepSize > 0.3 * data._geomSize )
4411 limitStepSize( data, 0.3 * data._geomSize );
4413 const double tgtThick = data._maxThickness;
4414 if ( data._stepSize > data._minThickness )
4415 limitStepSize( data, data._minThickness );
4417 if ( data._stepSize < 1. )
4418 data._epsilon = data._stepSize * 1e-7;
4420 debugMsg( "-- geomSize = " << data._geomSize << ", stepSize = " << data._stepSize );
4423 findCollisionEdges( data, helper );
4425 limitMaxLenByCurvature( data, helper );
4429 // limit length of _LayerEdge's around MULTI_NORMAL _LayerEdge's
4430 for ( size_t i = 0; i < data._edgesOnShape.size(); ++i )
4431 if ( data._edgesOnShape[i].ShapeType() == TopAbs_VERTEX &&
4432 data._edgesOnShape[i]._edges.size() > 0 &&
4433 data._edgesOnShape[i]._edges[0]->Is( _LayerEdge::MULTI_NORMAL ))
4435 data._edgesOnShape[i]._edges[0]->Unset( _LayerEdge::BLOCKED );
4436 data._edgesOnShape[i]._edges[0]->Block( data );
4439 const double safeFactor = ( 2*data._maxThickness < data._geomSize ) ? 1 : theThickToIntersection;
4441 double avgThick = 0, curThick = 0, distToIntersection = Precision::Infinite();
4442 int nbSteps = 0, nbRepeats = 0;
4443 while ( avgThick < 0.99 )
4445 // new target length
4446 double prevThick = curThick;
4447 curThick += data._stepSize;
4448 if ( curThick > tgtThick )
4450 curThick = tgtThick + tgtThick*( 1.-avgThick ) * nbRepeats;
4454 double stepSize = curThick - prevThick;
4455 updateNormalsOfSmoothed( data, helper, nbSteps, stepSize ); // to ease smoothing
4457 // Elongate _LayerEdge's
4458 dumpFunction(SMESH_Comment("inflate")<<data._index<<"_step"<<nbSteps); // debug
4459 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
4461 _EdgesOnShape& eos = data._edgesOnShape[iS];
4462 if ( eos._edges.empty() ) continue;
4464 const double shapeCurThick = Min( curThick, eos._hyp.GetTotalThickness() );
4465 for ( size_t i = 0; i < eos._edges.size(); ++i )
4467 eos._edges[i]->SetNewLength( shapeCurThick, eos, helper );
4472 if ( !updateNormals( data, helper, nbSteps, stepSize )) // to avoid collisions
4475 // Improve and check quality
4476 if ( !smoothAndCheck( data, nbSteps, distToIntersection ))
4480 #ifdef __NOT_INVALIDATE_BAD_SMOOTH
4481 debugMsg("NOT INVALIDATED STEP!");
4482 return error("Smoothing failed", data._index);
4484 dumpFunction(SMESH_Comment("invalidate")<<data._index<<"_step"<<nbSteps); // debug
4485 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
4487 _EdgesOnShape& eos = data._edgesOnShape[iS];
4488 for ( size_t i = 0; i < eos._edges.size(); ++i )
4489 eos._edges[i]->InvalidateStep( nbSteps+1, eos );
4493 break; // no more inflating possible
4497 // Evaluate achieved thickness
4499 int nbActiveEdges = 0;
4500 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
4502 _EdgesOnShape& eos = data._edgesOnShape[iS];
4503 if ( eos._edges.empty() ) continue;
4505 const double shapeTgtThick = eos._hyp.GetTotalThickness();
4506 for ( size_t i = 0; i < eos._edges.size(); ++i )
4508 if ( eos._edges[i]->_nodes.size() > 1 )
4509 avgThick += Min( 1., eos._edges[i]->_len / shapeTgtThick );
4511 avgThick += shapeTgtThick;
4512 nbActiveEdges += ( ! eos._edges[i]->Is( _LayerEdge::BLOCKED ));
4515 avgThick /= data._n2eMap.size();
4516 debugMsg( "-- Thickness " << curThick << " ("<< avgThick*100 << "%) reached" );
4518 #ifdef BLOCK_INFLATION
4519 if ( nbActiveEdges == 0 )
4521 debugMsg( "-- Stop inflation since all _LayerEdge's BLOCKED " );
4525 if ( distToIntersection < tgtThick * avgThick * safeFactor && avgThick < 0.9 )
4527 debugMsg( "-- Stop inflation since "
4528 << " distToIntersection( "<<distToIntersection<<" ) < avgThick( "
4529 << tgtThick * avgThick << " ) * " << safeFactor );
4534 limitStepSize( data, 0.25 * distToIntersection );
4535 if ( data._stepSizeNodes[0] )
4536 data._stepSize = data._stepSizeCoeff *
4537 SMESH_TNodeXYZ(data._stepSizeNodes[0]).Distance(data._stepSizeNodes[1]);
4539 } // while ( avgThick < 0.99 )
4542 return error("failed at the very first inflation step", data._index);
4544 if ( avgThick < 0.99 )
4546 if ( !data._proxyMesh->_warning || data._proxyMesh->_warning->IsOK() )
4548 data._proxyMesh->_warning.reset
4549 ( new SMESH_ComputeError (COMPERR_WARNING,
4550 SMESH_Comment("Thickness ") << tgtThick <<
4551 " of viscous layers not reached,"
4552 " average reached thickness is " << avgThick*tgtThick));
4556 // Restore position of src nodes moved by inflation on _noShrinkShapes
4557 dumpFunction(SMESH_Comment("restoNoShrink_So")<<data._index); // debug
4558 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
4560 _EdgesOnShape& eos = data._edgesOnShape[iS];
4561 if ( !eos._edges.empty() && eos._edges[0]->_nodes.size() == 1 )
4562 for ( size_t i = 0; i < eos._edges.size(); ++i )
4564 restoreNoShrink( *eos._edges[ i ] );
4569 return safeFactor > 0; // == true (avoid warning: unused variable 'safeFactor')
4572 //================================================================================
4574 * \brief Improve quality of layer inner surface and check intersection
4576 //================================================================================
4578 bool _ViscousBuilder::smoothAndCheck(_SolidData& data,
4580 double & distToIntersection)
4582 if ( data._nbShapesToSmooth == 0 )
4583 return true; // no shapes needing smoothing
4585 bool moved, improved;
4587 vector< _LayerEdge* > movedEdges, badEdges;
4588 vector< _EdgesOnShape* > eosC1; // C1 continues shapes
4589 vector< bool > isConcaveFace;
4591 SMESH_MesherHelper helper(*_mesh);
4592 Handle(ShapeAnalysis_Surface) surface;
4595 for ( int isFace = 0; isFace < 2; ++isFace ) // smooth on [ EDGEs, FACEs ]
4597 const TopAbs_ShapeEnum shapeType = isFace ? TopAbs_FACE : TopAbs_EDGE;
4599 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
4601 _EdgesOnShape& eos = data._edgesOnShape[ iS ];
4602 if ( !eos._toSmooth ||
4603 eos.ShapeType() != shapeType ||
4604 eos._edges.empty() )
4607 // already smoothed?
4608 // bool toSmooth = ( eos._edges[ 0 ]->NbSteps() >= infStep+1 );
4609 // if ( !toSmooth ) continue;
4611 if ( !eos._hyp.ToSmooth() )
4613 // smooth disabled by the user; check validy only
4614 if ( !isFace ) continue;
4616 for ( size_t i = 0; i < eos._edges.size(); ++i )
4618 _LayerEdge* edge = eos._edges[i];
4619 for ( size_t iF = 0; iF < edge->_simplices.size(); ++iF )
4620 if ( !edge->_simplices[iF].IsForward( edge->_nodes[0], edge->_pos.back(), vol ))
4622 // debugMsg( "-- Stop inflation. Bad simplex ("
4623 // << " "<< edge->_nodes[0]->GetID()
4624 // << " "<< edge->_nodes.back()->GetID()
4625 // << " "<< edge->_simplices[iF]._nPrev->GetID()
4626 // << " "<< edge->_simplices[iF]._nNext->GetID() << " ) ");
4628 badEdges.push_back( edge );
4631 if ( !badEdges.empty() )
4635 int nbBad = invalidateBadSmooth( data, helper, badEdges, eosC1, infStep );
4639 continue; // goto the next EDGE or FACE
4643 if ( eos.SWOLType() == TopAbs_FACE )
4645 if ( !F.IsSame( eos._sWOL )) {
4646 F = TopoDS::Face( eos._sWOL );
4647 helper.SetSubShape( F );
4648 surface = helper.GetSurface( F );
4653 F.Nullify(); surface.Nullify();
4655 const TGeomID sInd = eos._shapeID;
4657 // perform smoothing
4659 if ( eos.ShapeType() == TopAbs_EDGE )
4661 dumpFunction(SMESH_Comment("smooth")<<data._index << "_Ed"<<sInd <<"_InfStep"<<infStep);
4663 if ( !eos._edgeSmoother->Perform( data, surface, F, helper ))
4665 // smooth on EDGE's (normally we should not get here)
4669 for ( size_t i = 0; i < eos._edges.size(); ++i )
4671 moved |= eos._edges[i]->SmoothOnEdge( surface, F, helper );
4673 dumpCmd( SMESH_Comment("# end step ")<<step);
4675 while ( moved && step++ < 5 );
4680 else // smooth on FACE
4683 eosC1.push_back( & eos );
4684 eosC1.insert( eosC1.end(), eos._eosC1.begin(), eos._eosC1.end() );
4687 isConcaveFace.resize( eosC1.size() );
4688 for ( size_t iEOS = 0; iEOS < eosC1.size(); ++iEOS )
4690 isConcaveFace[ iEOS ] = data._concaveFaces.count( eosC1[ iEOS ]->_shapeID );
4691 vector< _LayerEdge* > & edges = eosC1[ iEOS ]->_edges;
4692 for ( size_t i = 0; i < edges.size(); ++i )
4693 if ( edges[i]->Is( _LayerEdge::MOVED ) ||
4694 edges[i]->Is( _LayerEdge::NEAR_BOUNDARY ))
4695 movedEdges.push_back( edges[i] );
4697 makeOffsetSurface( *eosC1[ iEOS ], helper );
4700 int step = 0, stepLimit = 5, nbBad = 0;
4701 while (( ++step <= stepLimit ) || improved )
4703 dumpFunction(SMESH_Comment("smooth")<<data._index<<"_Fa"<<sInd
4704 <<"_InfStep"<<infStep<<"_"<<step); // debug
4705 int oldBadNb = nbBad;
4708 #ifdef INCREMENTAL_SMOOTH
4709 bool findBest = false; // ( step == stepLimit );
4710 for ( size_t i = 0; i < movedEdges.size(); ++i )
4712 movedEdges[i]->Unset( _LayerEdge::SMOOTHED );
4713 if ( movedEdges[i]->Smooth( step, findBest, movedEdges ) > 0 )
4714 badEdges.push_back( movedEdges[i] );
4717 bool findBest = ( step == stepLimit || isConcaveFace[ iEOS ]);
4718 for ( size_t iEOS = 0; iEOS < eosC1.size(); ++iEOS )
4720 vector< _LayerEdge* > & edges = eosC1[ iEOS ]->_edges;
4721 for ( size_t i = 0; i < edges.size(); ++i )
4723 edges[i]->Unset( _LayerEdge::SMOOTHED );
4724 if ( edges[i]->Smooth( step, findBest, false ) > 0 )
4725 badEdges.push_back( eos._edges[i] );
4729 nbBad = badEdges.size();
4732 debugMsg(SMESH_Comment("nbBad = ") << nbBad );
4734 if ( !badEdges.empty() && step >= stepLimit / 2 )
4736 if ( badEdges[0]->Is( _LayerEdge::ON_CONCAVE_FACE ))
4739 // resolve hard smoothing situation around concave VERTEXes
4740 for ( size_t iEOS = 0; iEOS < eosC1.size(); ++iEOS )
4742 vector< _EdgesOnShape* > & eosCoVe = eosC1[ iEOS ]->_eosConcaVer;
4743 for ( size_t i = 0; i < eosCoVe.size(); ++i )
4744 eosCoVe[i]->_edges[0]->MoveNearConcaVer( eosCoVe[i], eosC1[ iEOS ],
4747 // look for the best smooth of _LayerEdge's neighboring badEdges
4749 for ( size_t i = 0; i < badEdges.size(); ++i )
4751 _LayerEdge* ledge = badEdges[i];
4752 for ( size_t iN = 0; iN < ledge->_neibors.size(); ++iN )
4754 ledge->_neibors[iN]->Unset( _LayerEdge::SMOOTHED );
4755 nbBad += ledge->_neibors[iN]->Smooth( step, true, /*findBest=*/true );
4757 ledge->Unset( _LayerEdge::SMOOTHED );
4758 nbBad += ledge->Smooth( step, true, /*findBest=*/true );
4760 debugMsg(SMESH_Comment("nbBad = ") << nbBad );
4763 if ( nbBad == oldBadNb &&
4765 step < stepLimit ) // smooth w/o chech of validity
4768 dumpFunction(SMESH_Comment("smoothWoCheck")<<data._index<<"_Fa"<<sInd
4769 <<"_InfStep"<<infStep<<"_"<<step); // debug
4770 for ( size_t i = 0; i < movedEdges.size(); ++i )
4772 movedEdges[i]->SmoothWoCheck();
4774 if ( stepLimit < 9 )
4778 improved = ( nbBad < oldBadNb );
4782 if (( step % 3 == 1 ) || ( nbBad > 0 && step >= stepLimit / 2 ))
4783 for ( size_t iEOS = 0; iEOS < eosC1.size(); ++iEOS )
4785 putOnOffsetSurface( *eosC1[ iEOS ], infStep, eosC1, step, /*moveAll=*/step == 1 );
4788 } // smoothing steps
4790 // project -- to prevent intersections or fix bad simplices
4791 for ( size_t iEOS = 0; iEOS < eosC1.size(); ++iEOS )
4793 if ( ! eosC1[ iEOS ]->_eosConcaVer.empty() || nbBad > 0 )
4794 putOnOffsetSurface( *eosC1[ iEOS ], infStep, eosC1 );
4797 //if ( !badEdges.empty() )
4800 for ( size_t iEOS = 0; iEOS < eosC1.size(); ++iEOS )
4802 for ( size_t i = 0; i < eosC1[ iEOS ]->_edges.size(); ++i )
4804 if ( !eosC1[ iEOS ]->_sWOL.IsNull() ) continue;
4806 _LayerEdge* edge = eosC1[ iEOS ]->_edges[i];
4807 edge->CheckNeiborsOnBoundary( & badEdges );
4808 if (( nbBad > 0 ) ||
4809 ( edge->Is( _LayerEdge::BLOCKED ) && edge->Is( _LayerEdge::NEAR_BOUNDARY )))
4811 SMESH_TNodeXYZ tgtXYZ = edge->_nodes.back();
4812 gp_XYZ prevXYZ = edge->PrevCheckPos();
4813 for ( size_t j = 0; j < edge->_simplices.size(); ++j )
4814 if ( !edge->_simplices[j].IsForward( &prevXYZ, &tgtXYZ, vol ))
4816 debugMsg("Bad simplex ( " << edge->_nodes[0]->GetID()
4817 << " "<< tgtXYZ._node->GetID()
4818 << " "<< edge->_simplices[j]._nPrev->GetID()
4819 << " "<< edge->_simplices[j]._nNext->GetID() << " )" );
4820 badEdges.push_back( edge );
4827 // try to fix bad simplices by removing the last inflation step of some _LayerEdge's
4828 nbBad = invalidateBadSmooth( data, helper, badEdges, eosC1, infStep );
4834 } // // smooth on FACE's
4836 } // smooth on [ EDGEs, FACEs ]
4838 // Check orientation of simplices of _LayerEdge's on EDGEs and VERTEXes
4840 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
4842 _EdgesOnShape& eos = data._edgesOnShape[ iS ];
4843 if ( eos.ShapeType() == TopAbs_FACE ||
4844 eos._edges.empty() ||
4845 !eos._sWOL.IsNull() )
4849 for ( size_t i = 0; i < eos._edges.size(); ++i )
4851 _LayerEdge* edge = eos._edges[i];
4852 if ( edge->_nodes.size() < 2 ) continue;
4853 SMESH_TNodeXYZ tgtXYZ = edge->_nodes.back();
4854 gp_XYZ prevXYZ = edge->PrevCheckPos( &eos );
4855 //const gp_XYZ& prevXYZ = edge->PrevPos();
4856 for ( size_t j = 0; j < edge->_simplices.size(); ++j )
4857 if ( !edge->_simplices[j].IsForward( &prevXYZ, &tgtXYZ, vol ))
4859 debugMsg("Bad simplex on bnd ( " << edge->_nodes[0]->GetID()
4860 << " "<< tgtXYZ._node->GetID()
4861 << " "<< edge->_simplices[j]._nPrev->GetID()
4862 << " "<< edge->_simplices[j]._nNext->GetID() << " )" );
4863 badEdges.push_back( edge );
4868 // try to fix bad simplices by removing the last inflation step of some _LayerEdge's
4870 int nbBad = invalidateBadSmooth( data, helper, badEdges, eosC1, infStep );
4876 // Check if the last segments of _LayerEdge intersects 2D elements;
4877 // checked elements are either temporary faces or faces on surfaces w/o the layers
4879 SMESHUtils::Deleter<SMESH_ElementSearcher> searcher
4880 ( SMESH_MeshAlgos::GetElementSearcher( *getMeshDS(),
4881 data._proxyMesh->GetFaces( data._solid )) );
4883 #ifdef BLOCK_INFLATION
4884 const bool toBlockInfaltion = true;
4886 const bool toBlockInfaltion = false;
4888 distToIntersection = Precision::Infinite();
4890 const SMDS_MeshElement* intFace = 0;
4891 const SMDS_MeshElement* closestFace = 0;
4893 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
4895 _EdgesOnShape& eos = data._edgesOnShape[ iS ];
4896 if ( eos._edges.empty() || !eos._sWOL.IsNull() )
4898 for ( size_t i = 0; i < eos._edges.size(); ++i )
4900 if ( eos._edges[i]->Is( _LayerEdge::INTERSECTED ) ||
4901 eos._edges[i]->Is( _LayerEdge::MULTI_NORMAL ))
4903 if ( eos._edges[i]->FindIntersection( *searcher, dist, data._epsilon, eos, &intFace ))
4906 // commented due to "Illegal hash-positionPosition" error in NETGEN
4907 // on Debian60 on viscous_layers_01/B2 case
4908 // Collision; try to deflate _LayerEdge's causing it
4909 // badEdges.clear();
4910 // badEdges.push_back( eos._edges[i] );
4911 // eosC1[0] = & eos;
4912 // int nbBad = invalidateBadSmooth( data, helper, badEdges, eosC1, infStep );
4916 // badEdges.clear();
4917 // if ( _EdgesOnShape* eof = data.GetShapeEdges( intFace->getshapeId() ))
4919 // if ( const _TmpMeshFace* f = dynamic_cast< const _TmpMeshFace*>( intFace ))
4921 // const SMDS_MeshElement* srcFace =
4922 // eof->_subMesh->GetSubMeshDS()->GetElement( f->getIdInShape() );
4923 // SMDS_ElemIteratorPtr nIt = srcFace->nodesIterator();
4924 // while ( nIt->more() )
4926 // const SMDS_MeshNode* srcNode = static_cast<const SMDS_MeshNode*>( nIt->next() );
4927 // TNode2Edge::iterator n2e = data._n2eMap.find( srcNode );
4928 // if ( n2e != data._n2eMap.end() )
4929 // badEdges.push_back( n2e->second );
4932 // nbBad = invalidateBadSmooth( data, helper, badEdges, eosC1, infStep );
4937 // if ( eos._edges[i]->FindIntersection( *searcher, dist, data._epsilon, eos, &intFace ))
4944 SMESH_Comment msg("Invalid? normal at node "); msg << eos._edges[i]->_nodes[0]->GetID();
4949 const bool isShorterDist = ( distToIntersection > dist );
4950 if ( toBlockInfaltion || isShorterDist )
4952 // ignore intersection of a _LayerEdge based on a _ConvexFace with a face
4953 // lying on this _ConvexFace
4954 if ( _ConvexFace* convFace = data.GetConvexFace( intFace->getshapeId() ))
4955 if ( convFace->_isTooCurved && convFace->_subIdToEOS.count ( eos._shapeID ))
4958 // ignore intersection of a _LayerEdge based on a FACE with an element on this FACE
4959 // ( avoid limiting the thickness on the case of issue 22576)
4960 if ( intFace->getshapeId() == eos._shapeID )
4963 // ignore intersection with intFace of an adjacent FACE
4966 bool toIgnore = false;
4967 if ( eos._toSmooth )
4969 const TopoDS_Shape& S = getMeshDS()->IndexToShape( intFace->getshapeId() );
4970 if ( !S.IsNull() && S.ShapeType() == TopAbs_FACE )
4972 TopExp_Explorer sub( eos._shape,
4973 eos.ShapeType() == TopAbs_FACE ? TopAbs_EDGE : TopAbs_VERTEX );
4974 for ( ; !toIgnore && sub.More(); sub.Next() )
4975 // is adjacent - has a common EDGE or VERTEX
4976 toIgnore = ( helper.IsSubShape( sub.Current(), S ));
4978 if ( toIgnore ) // check angle between normals
4981 if ( SMESH_MeshAlgos::FaceNormal( intFace, normal, /*normalized=*/true ))
4982 toIgnore = ( normal * eos._edges[i]->_normal > -0.5 );
4986 if ( !toIgnore ) // check if the edge is a neighbor of intFace
4988 for ( size_t iN = 0; !toIgnore && iN < eos._edges[i]->_neibors.size(); ++iN )
4990 int nInd = intFace->GetNodeIndex( eos._edges[i]->_neibors[ iN ]->_nodes.back() );
4991 toIgnore = ( nInd >= 0 );
4998 // intersection not ignored
5000 if ( toBlockInfaltion &&
5001 dist < ( eos._edges[i]->_len * theThickToIntersection ))
5003 eos._edges[i]->Set( _LayerEdge::INTERSECTED ); // not to intersect
5004 eos._edges[i]->Block( data ); // not to inflate
5006 if ( _EdgesOnShape* eof = data.GetShapeEdges( intFace->getshapeId() ))
5008 // block _LayerEdge's, on top of which intFace is
5009 if ( const _TmpMeshFace* f = dynamic_cast< const _TmpMeshFace*>( intFace ))
5011 const SMDS_MeshElement* srcFace =
5012 eof->_subMesh->GetSubMeshDS()->GetElement( f->getIdInShape() );
5013 SMDS_ElemIteratorPtr nIt = srcFace->nodesIterator();
5014 while ( nIt->more() )
5016 const SMDS_MeshNode* srcNode = static_cast<const SMDS_MeshNode*>( nIt->next() );
5017 TNode2Edge::iterator n2e = data._n2eMap.find( srcNode );
5018 if ( n2e != data._n2eMap.end() )
5019 n2e->second->Block( data );
5025 if ( isShorterDist )
5027 distToIntersection = dist;
5029 closestFace = intFace;
5032 } // if ( toBlockInfaltion || isShorterDist )
5033 } // loop on eos._edges
5034 } // loop on data._edgesOnShape
5036 if ( closestFace && le )
5039 SMDS_MeshElement::iterator nIt = closestFace->begin_nodes();
5040 cout << "Shortest distance: _LayerEdge nodes: tgt " << le->_nodes.back()->GetID()
5041 << " src " << le->_nodes[0]->GetID()<< ", intersection with face ("
5042 << (*nIt++)->GetID()<<" "<< (*nIt++)->GetID()<<" "<< (*nIt++)->GetID()
5043 << ") distance = " << distToIntersection<< endl;
5050 //================================================================================
5052 * \brief try to fix bad simplices by removing the last inflation step of some _LayerEdge's
5053 * \param [in,out] badSmooEdges - _LayerEdge's to fix
5054 * \return int - resulting nb of bad _LayerEdge's
5056 //================================================================================
5058 int _ViscousBuilder::invalidateBadSmooth( _SolidData& data,
5059 SMESH_MesherHelper& helper,
5060 vector< _LayerEdge* >& badSmooEdges,
5061 vector< _EdgesOnShape* >& eosC1,
5064 if ( badSmooEdges.empty() || infStep == 0 ) return 0;
5066 dumpFunction(SMESH_Comment("invalidateBadSmooth")<<"_S"<<eosC1[0]->_shapeID<<"_InfStep"<<infStep);
5069 INVALIDATED = _LayerEdge::UNUSED_FLAG,
5070 TO_INVALIDATE = _LayerEdge::UNUSED_FLAG * 2,
5071 ADDED = _LayerEdge::UNUSED_FLAG * 4
5073 data.UnmarkEdges( TO_INVALIDATE & INVALIDATED & ADDED );
5076 bool haveInvalidated = true;
5077 while ( haveInvalidated )
5079 haveInvalidated = false;
5080 for ( size_t i = 0; i < badSmooEdges.size(); ++i )
5082 _LayerEdge* edge = badSmooEdges[i];
5083 _EdgesOnShape* eos = data.GetShapeEdges( edge );
5085 bool invalidated = false;
5086 if ( edge->Is( TO_INVALIDATE ) && edge->NbSteps() > 1 )
5088 edge->InvalidateStep( edge->NbSteps(), *eos, /*restoreLength=*/true );
5089 edge->Block( data );
5090 edge->Set( INVALIDATED );
5091 edge->Unset( TO_INVALIDATE );
5093 haveInvalidated = true;
5096 // look for _LayerEdge's of bad _simplices
5098 SMESH_TNodeXYZ tgtXYZ = edge->_nodes.back();
5099 gp_XYZ prevXYZ1 = edge->PrevCheckPos( eos );
5100 //const gp_XYZ& prevXYZ2 = edge->PrevPos();
5101 for ( size_t j = 0; j < edge->_simplices.size(); ++j )
5103 if (( edge->_simplices[j].IsForward( &prevXYZ1, &tgtXYZ, vol ))/* &&
5104 ( &prevXYZ1 == &prevXYZ2 || edge->_simplices[j].IsForward( &prevXYZ2, &tgtXYZ, vol ))*/)
5108 _LayerEdge* ee[2] = { 0,0 };
5109 for ( size_t iN = 0; iN < edge->_neibors.size() && !ee[1] ; ++iN )
5110 if ( edge->_simplices[j].Includes( edge->_neibors[iN]->_nodes.back() ))
5111 ee[ ee[0] != 0 ] = edge->_neibors[iN];
5113 int maxNbSteps = Max( ee[0]->NbSteps(), ee[1]->NbSteps() );
5114 while ( maxNbSteps > edge->NbSteps() && isBad )
5117 for ( int iE = 0; iE < 2; ++iE )
5119 if ( ee[ iE ]->NbSteps() > maxNbSteps &&
5120 ee[ iE ]->NbSteps() > 1 )
5122 _EdgesOnShape* eos = data.GetShapeEdges( ee[ iE ] );
5123 ee[ iE ]->InvalidateStep( ee[ iE ]->NbSteps(), *eos, /*restoreLength=*/true );
5124 ee[ iE ]->Block( data );
5125 ee[ iE ]->Set( INVALIDATED );
5126 haveInvalidated = true;
5129 if (( edge->_simplices[j].IsForward( &prevXYZ1, &tgtXYZ, vol )) /*&&
5130 ( &prevXYZ1 == &prevXYZ2 || edge->_simplices[j].IsForward( &prevXYZ2, &tgtXYZ, vol ))*/)
5134 if ( !ee[0]->Is( ADDED )) badSmooEdges.push_back( ee[0] );
5135 if ( !ee[1]->Is( ADDED )) badSmooEdges.push_back( ee[1] );
5136 ee[0]->Set( ADDED );
5137 ee[1]->Set( ADDED );
5140 ee[0]->Set( TO_INVALIDATE );
5141 ee[1]->Set( TO_INVALIDATE );
5145 if ( !invalidated && nbBad > 0 && edge->NbSteps() > 1 )
5147 _EdgesOnShape* eos = data.GetShapeEdges( edge );
5148 edge->InvalidateStep( edge->NbSteps(), *eos, /*restoreLength=*/true );
5149 edge->Block( data );
5150 edge->Set( INVALIDATED );
5151 edge->Unset( TO_INVALIDATE );
5152 haveInvalidated = true;
5154 } // loop on badSmooEdges
5155 } // while ( haveInvalidated )
5157 // re-smooth on analytical EDGEs
5158 for ( size_t i = 0; i < badSmooEdges.size(); ++i )
5160 _LayerEdge* edge = badSmooEdges[i];
5161 if ( !edge->Is( INVALIDATED )) continue;
5163 _EdgesOnShape* eos = data.GetShapeEdges( edge );
5164 if ( eos->ShapeType() == TopAbs_VERTEX )
5166 PShapeIteratorPtr eIt = helper.GetAncestors( eos->_shape, *_mesh, TopAbs_EDGE );
5167 while ( const TopoDS_Shape* e = eIt->next() )
5168 if ( _EdgesOnShape* eoe = data.GetShapeEdges( *e ))
5169 if ( eoe->_edgeSmoother && eoe->_edgeSmoother->isAnalytic() )
5171 // TopoDS_Face F; Handle(ShapeAnalysis_Surface) surface;
5172 // if ( eoe->SWOLType() == TopAbs_FACE ) {
5173 // F = TopoDS::Face( eoe->_sWOL );
5174 // surface = helper.GetSurface( F );
5176 // eoe->_edgeSmoother->Perform( data, surface, F, helper );
5177 eoe->_edgeSmoother->_anaCurve.Nullify();
5183 // check result of invalidation
5186 for ( size_t iEOS = 0; iEOS < eosC1.size(); ++iEOS )
5188 for ( size_t i = 0; i < eosC1[ iEOS ]->_edges.size(); ++i )
5190 if ( !eosC1[ iEOS ]->_sWOL.IsNull() ) continue;
5191 _LayerEdge* edge = eosC1[ iEOS ]->_edges[i];
5192 SMESH_TNodeXYZ tgtXYZ = edge->_nodes.back();
5193 gp_XYZ prevXYZ = edge->PrevCheckPos( eosC1[ iEOS ]);
5194 for ( size_t j = 0; j < edge->_simplices.size(); ++j )
5195 if ( !edge->_simplices[j].IsForward( &prevXYZ, &tgtXYZ, vol ))
5198 debugMsg("Bad simplex remains ( " << edge->_nodes[0]->GetID()
5199 << " "<< tgtXYZ._node->GetID()
5200 << " "<< edge->_simplices[j]._nPrev->GetID()
5201 << " "<< edge->_simplices[j]._nNext->GetID() << " )" );
5210 //================================================================================
5212 * \brief Create an offset surface
5214 //================================================================================
5216 void _ViscousBuilder::makeOffsetSurface( _EdgesOnShape& eos, SMESH_MesherHelper& helper )
5218 if ( eos._offsetSurf.IsNull() ||
5219 eos._edgeForOffset == 0 ||
5220 eos._edgeForOffset->Is( _LayerEdge::BLOCKED ))
5223 Handle(ShapeAnalysis_Surface) baseSurface = helper.GetSurface( TopoDS::Face( eos._shape ));
5226 gp_Pnt tgtP = SMESH_TNodeXYZ( eos._edgeForOffset->_nodes.back() );
5227 /*gp_Pnt2d uv=*/baseSurface->ValueOfUV( tgtP, Precision::Confusion() );
5228 double offset = baseSurface->Gap();
5230 eos._offsetSurf.Nullify();
5234 BRepOffsetAPI_MakeOffsetShape offsetMaker( eos._shape, -offset, Precision::Confusion() );
5235 if ( !offsetMaker.IsDone() ) return;
5237 TopExp_Explorer fExp( offsetMaker.Shape(), TopAbs_FACE );
5238 if ( !fExp.More() ) return;
5240 TopoDS_Face F = TopoDS::Face( fExp.Current() );
5241 Handle(Geom_Surface) surf = BRep_Tool::Surface( F );
5242 if ( surf.IsNull() ) return;
5244 eos._offsetSurf = new ShapeAnalysis_Surface( surf );
5246 catch ( Standard_Failure )
5251 //================================================================================
5253 * \brief Put nodes of a curved FACE to its offset surface
5255 //================================================================================
5257 void _ViscousBuilder::putOnOffsetSurface( _EdgesOnShape& eos,
5259 vector< _EdgesOnShape* >& eosC1,
5263 _EdgesOnShape * eof = & eos;
5264 if ( eos.ShapeType() != TopAbs_FACE ) // eos is a boundary of C1 FACE, look for the FACE eos
5267 for ( size_t i = 0; i < eosC1.size() && !eof; ++i )
5269 if ( eosC1[i]->_offsetSurf.IsNull() ||
5270 eosC1[i]->ShapeType() != TopAbs_FACE ||
5271 eosC1[i]->_edgeForOffset == 0 ||
5272 eosC1[i]->_edgeForOffset->Is( _LayerEdge::BLOCKED ))
5274 if ( SMESH_MesherHelper::IsSubShape( eos._shape, eosC1[i]->_shape ))
5279 eof->_offsetSurf.IsNull() ||
5280 eof->ShapeType() != TopAbs_FACE ||
5281 eof->_edgeForOffset == 0 ||
5282 eof->_edgeForOffset->Is( _LayerEdge::BLOCKED ))
5285 double preci = BRep_Tool::Tolerance( TopoDS::Face( eof->_shape )), vol;
5286 for ( size_t i = 0; i < eos._edges.size(); ++i )
5288 _LayerEdge* edge = eos._edges[i];
5289 edge->Unset( _LayerEdge::MARKED );
5290 if ( edge->Is( _LayerEdge::BLOCKED ) || !edge->_curvature )
5292 if ( moveAll == _LayerEdge::UPD_NORMAL_CONV )
5294 if ( !edge->Is( _LayerEdge::UPD_NORMAL_CONV ))
5297 else if ( !moveAll && !edge->Is( _LayerEdge::MOVED ))
5300 int nbBlockedAround = 0;
5301 for ( size_t iN = 0; iN < edge->_neibors.size(); ++iN )
5302 nbBlockedAround += edge->_neibors[iN]->Is( _LayerEdge::BLOCKED );
5303 if ( nbBlockedAround > 1 )
5306 gp_Pnt tgtP = SMESH_TNodeXYZ( edge->_nodes.back() );
5307 gp_Pnt2d uv = eof->_offsetSurf->NextValueOfUV( edge->_curvature->_uv, tgtP, preci );
5308 if ( eof->_offsetSurf->Gap() > edge->_len ) continue; // NextValueOfUV() bug
5309 edge->_curvature->_uv = uv;
5310 if ( eof->_offsetSurf->Gap() < 10 * preci ) continue; // same pos
5312 gp_XYZ newP = eof->_offsetSurf->Value( uv ).XYZ();
5313 gp_XYZ prevP = edge->PrevCheckPos();
5316 for ( size_t iS = 0; iS < edge->_simplices.size() && ok; ++iS )
5318 ok = edge->_simplices[iS].IsForward( &prevP, &newP, vol );
5322 SMDS_MeshNode* n = const_cast< SMDS_MeshNode* >( edge->_nodes.back() );
5323 n->setXYZ( newP.X(), newP.Y(), newP.Z());
5324 edge->_pos.back() = newP;
5326 edge->Set( _LayerEdge::MARKED );
5327 if ( moveAll == _LayerEdge::UPD_NORMAL_CONV )
5329 edge->_normal = ( newP - prevP ).Normalized();
5337 // dumpMove() for debug
5339 for ( ; i < eos._edges.size(); ++i )
5340 if ( eos._edges[i]->Is( _LayerEdge::MARKED ))
5342 if ( i < eos._edges.size() )
5344 dumpFunction(SMESH_Comment("putOnOffsetSurface_S") << eos._shapeID
5345 << "_InfStep" << infStep << "_" << smooStep );
5346 for ( ; i < eos._edges.size(); ++i )
5348 if ( eos._edges[i]->Is( _LayerEdge::MARKED ))
5349 dumpMove( eos._edges[i]->_nodes.back() );
5355 _ConvexFace* cnvFace;
5356 if ( moveAll != _LayerEdge::UPD_NORMAL_CONV &&
5357 eos.ShapeType() == TopAbs_FACE &&
5358 (cnvFace = eos.GetData().GetConvexFace( eos._shapeID )) &&
5359 !cnvFace->_normalsFixedOnBorders )
5361 // put on the surface nodes built on FACE boundaries
5362 SMESH_subMeshIteratorPtr smIt = eos._subMesh->getDependsOnIterator(/*includeSelf=*/false);
5363 while ( smIt->more() )
5365 SMESH_subMesh* sm = smIt->next();
5366 _EdgesOnShape* subEOS = eos.GetData().GetShapeEdges( sm->GetId() );
5367 if ( !subEOS->_sWOL.IsNull() ) continue;
5368 if ( std::find( eosC1.begin(), eosC1.end(), subEOS ) != eosC1.end() ) continue;
5370 putOnOffsetSurface( *subEOS, infStep, eosC1, smooStep, _LayerEdge::UPD_NORMAL_CONV );
5372 cnvFace->_normalsFixedOnBorders = true;
5376 //================================================================================
5378 * \brief Return a curve of the EDGE to be used for smoothing and arrange
5379 * _LayerEdge's to be in a consequent order
5381 //================================================================================
5383 Handle(Geom_Curve) _Smoother1D::CurveForSmooth( const TopoDS_Edge& E,
5385 SMESH_MesherHelper& helper)
5387 SMESHDS_SubMesh* smDS = eos._subMesh->GetSubMeshDS();
5389 TopLoc_Location loc; double f,l;
5391 Handle(Geom_Line) line;
5392 Handle(Geom_Circle) circle;
5393 bool isLine, isCirc;
5394 if ( eos._sWOL.IsNull() ) /////////////////////////////////////////// 3D case
5396 // check if the EDGE is a line
5397 Handle(Geom_Curve) curve = BRep_Tool::Curve( E, f, l);
5398 if ( curve->IsKind( STANDARD_TYPE( Geom_TrimmedCurve )))
5399 curve = Handle(Geom_TrimmedCurve)::DownCast( curve )->BasisCurve();
5401 line = Handle(Geom_Line)::DownCast( curve );
5402 circle = Handle(Geom_Circle)::DownCast( curve );
5403 isLine = (!line.IsNull());
5404 isCirc = (!circle.IsNull());
5406 if ( !isLine && !isCirc ) // Check if the EDGE is close to a line
5408 isLine = SMESH_Algo::IsStraight( E );
5411 line = new Geom_Line( gp::OX() ); // only type does matter
5413 if ( !isLine && !isCirc && eos._edges.size() > 2) // Check if the EDGE is close to a circle
5418 else //////////////////////////////////////////////////////////////////////// 2D case
5420 if ( !eos._isRegularSWOL ) // 23190
5423 const TopoDS_Face& F = TopoDS::Face( eos._sWOL );
5425 // check if the EDGE is a line
5426 Handle(Geom2d_Curve) curve = BRep_Tool::CurveOnSurface( E, F, f, l );
5427 if ( curve->IsKind( STANDARD_TYPE( Geom2d_TrimmedCurve )))
5428 curve = Handle(Geom2d_TrimmedCurve)::DownCast( curve )->BasisCurve();
5430 Handle(Geom2d_Line) line2d = Handle(Geom2d_Line)::DownCast( curve );
5431 Handle(Geom2d_Circle) circle2d = Handle(Geom2d_Circle)::DownCast( curve );
5432 isLine = (!line2d.IsNull());
5433 isCirc = (!circle2d.IsNull());
5435 if ( !isLine && !isCirc ) // Check if the EDGE is close to a line
5438 SMDS_NodeIteratorPtr nIt = smDS->GetNodes();
5439 while ( nIt->more() )
5440 bndBox.Add( helper.GetNodeUV( F, nIt->next() ));
5441 gp_XY size = bndBox.CornerMax() - bndBox.CornerMin();
5443 const double lineTol = 1e-2 * sqrt( bndBox.SquareExtent() );
5444 for ( int i = 0; i < 2 && !isLine; ++i )
5445 isLine = ( size.Coord( i+1 ) <= lineTol );
5447 if ( !isLine && !isCirc && eos._edges.size() > 2 ) // Check if the EDGE is close to a circle
5453 line = new Geom_Line( gp::OX() ); // only type does matter
5457 gp_Pnt2d p = circle2d->Location();
5458 gp_Ax2 ax( gp_Pnt( p.X(), p.Y(), 0), gp::DX());
5459 circle = new Geom_Circle( ax, 1.); // only center position does matter
5468 return Handle(Geom_Curve)();
5471 //================================================================================
5473 * \brief Smooth edges on EDGE
5475 //================================================================================
5477 bool _Smoother1D::Perform(_SolidData& data,
5478 Handle(ShapeAnalysis_Surface)& surface,
5479 const TopoDS_Face& F,
5480 SMESH_MesherHelper& helper )
5482 if ( _leParams.empty() || ( !isAnalytic() && _offPoints.empty() ))
5485 findEdgesToSmooth();
5487 return smoothAnalyticEdge( data, surface, F, helper );
5489 return smoothComplexEdge ( data, surface, F, helper );
5492 //================================================================================
5494 * \brief Find edges to smooth
5496 //================================================================================
5498 void _Smoother1D::findEdgesToSmooth()
5500 _LayerEdge* leOnV[2] = { getLEdgeOnV(0), getLEdgeOnV(1) };
5501 for ( int iEnd = 0; iEnd < 2; ++iEnd )
5502 if ( leOnV[iEnd]->Is( _LayerEdge::NORMAL_UPDATED ))
5503 _leOnV[iEnd]._cosin = Abs( _edgeDir[iEnd].Normalized() * leOnV[iEnd]->_normal );
5505 _eToSmooth[0].first = _eToSmooth[0].second = 0;
5507 for ( size_t i = 0; i < _eos.size(); ++i )
5509 if ( !_eos[i]->Is( _LayerEdge::TO_SMOOTH ))
5511 if ( needSmoothing( _leOnV[0]._cosin, _eos[i]->_len, _curveLen * _leParams[i] ) ||
5513 _eos[i]->Set( _LayerEdge::TO_SMOOTH );
5517 _eToSmooth[0].second = i+1;
5520 _eToSmooth[1].first = _eToSmooth[1].second = _eos.size();
5522 for ( int i = _eos.size() - 1; i >= _eToSmooth[0].second; --i )
5524 if ( !_eos[i]->Is( _LayerEdge::TO_SMOOTH ))
5526 if ( needSmoothing( _leOnV[1]._cosin, _eos[i]->_len, _curveLen * ( 1.-_leParams[i] )) ||
5528 _eos[i]->Set( _LayerEdge::TO_SMOOTH );
5532 _eToSmooth[1].first = i;
5536 //================================================================================
5538 * \brief Check if iE-th _LayerEdge needs smoothing
5540 //================================================================================
5542 bool _Smoother1D::isToSmooth( int iE )
5544 SMESH_NodeXYZ pi( _eos[iE]->_nodes[0] );
5545 SMESH_NodeXYZ p0( _eos[iE]->_2neibors->srcNode(0) );
5546 SMESH_NodeXYZ p1( _eos[iE]->_2neibors->srcNode(1) );
5547 gp_XYZ seg0 = pi - p0;
5548 gp_XYZ seg1 = p1 - pi;
5549 gp_XYZ tangent = seg0 + seg1;
5550 double tangentLen = tangent.Modulus();
5551 double segMinLen = Min( seg0.Modulus(), seg1.Modulus() );
5552 if ( tangentLen < std::numeric_limits<double>::min() )
5554 tangent /= tangentLen;
5556 for ( size_t i = 0; i < _eos[iE]->_neibors.size(); ++i )
5558 _LayerEdge* ne = _eos[iE]->_neibors[i];
5559 if ( !ne->Is( _LayerEdge::TO_SMOOTH ) ||
5560 ne->_nodes.size() < 2 ||
5561 ne->_nodes[0]->GetPosition()->GetDim() != 2 )
5563 gp_XYZ edgeVec = SMESH_NodeXYZ( ne->_nodes.back() ) - SMESH_NodeXYZ( ne->_nodes[0] );
5564 double proj = edgeVec * tangent;
5565 if ( needSmoothing( 1., proj, segMinLen ))
5571 //================================================================================
5573 * \brief smooth _LayerEdge's on a staight EDGE or circular EDGE
5575 //================================================================================
5577 bool _Smoother1D::smoothAnalyticEdge( _SolidData& data,
5578 Handle(ShapeAnalysis_Surface)& surface,
5579 const TopoDS_Face& F,
5580 SMESH_MesherHelper& helper)
5582 if ( !isAnalytic() ) return false;
5584 size_t iFrom = 0, iTo = _eos._edges.size();
5586 if ( _anaCurve->IsKind( STANDARD_TYPE( Geom_Line )))
5588 if ( F.IsNull() ) // 3D
5590 SMESH_TNodeXYZ pSrc0( _eos._edges[iFrom]->_2neibors->srcNode(0) );
5591 SMESH_TNodeXYZ pSrc1( _eos._edges[iTo-1]->_2neibors->srcNode(1) );
5592 //const gp_XYZ lineDir = pSrc1 - pSrc0;
5593 //_LayerEdge* vLE0 = getLEdgeOnV( 0 );
5594 //_LayerEdge* vLE1 = getLEdgeOnV( 1 );
5595 // bool shiftOnly = ( vLE0->Is( _LayerEdge::NORMAL_UPDATED ) ||
5596 // vLE0->Is( _LayerEdge::BLOCKED ) ||
5597 // vLE1->Is( _LayerEdge::NORMAL_UPDATED ) ||
5598 // vLE1->Is( _LayerEdge::BLOCKED ));
5599 for ( int iEnd = 0; iEnd < 2; ++iEnd )
5601 iFrom = _eToSmooth[ iEnd ].first, iTo = _eToSmooth[ iEnd ].second;
5602 if ( iFrom >= iTo ) continue;
5603 SMESH_TNodeXYZ p0( _eos[iFrom]->_2neibors->tgtNode(0) );
5604 SMESH_TNodeXYZ p1( _eos[iTo-1]->_2neibors->tgtNode(1) );
5605 double param0 = ( iFrom == 0 ) ? 0. : _leParams[ iFrom-1 ];
5606 double param1 = _leParams[ iTo ];
5607 for ( size_t i = iFrom; i < iTo; ++i )
5609 _LayerEdge* edge = _eos[i];
5610 SMDS_MeshNode* tgtNode = const_cast<SMDS_MeshNode*>( edge->_nodes.back() );
5611 double param = ( _leParams[i] - param0 ) / ( param1 - param0 );
5612 gp_XYZ newPos = p0 * ( 1. - param ) + p1 * param;
5614 // if ( shiftOnly || edge->Is( _LayerEdge::NORMAL_UPDATED ))
5616 // gp_XYZ curPos = SMESH_TNodeXYZ ( tgtNode );
5617 // double shift = ( lineDir * ( newPos - pSrc0 ) -
5618 // lineDir * ( curPos - pSrc0 ));
5619 // newPos = curPos + lineDir * shift / lineDir.SquareModulus();
5621 if ( edge->Is( _LayerEdge::BLOCKED ))
5623 SMESH_TNodeXYZ pSrc( edge->_nodes[0] );
5624 double curThick = pSrc.SquareDistance( tgtNode );
5625 double newThink = ( pSrc - newPos ).SquareModulus();
5626 if ( newThink > curThick )
5629 edge->_pos.back() = newPos;
5630 tgtNode->setXYZ( newPos.X(), newPos.Y(), newPos.Z() );
5631 dumpMove( tgtNode );
5637 _LayerEdge* eV0 = getLEdgeOnV( 0 );
5638 _LayerEdge* eV1 = getLEdgeOnV( 1 );
5639 gp_XY uvV0 = eV0->LastUV( F, *data.GetShapeEdges( eV0 ));
5640 gp_XY uvV1 = eV1->LastUV( F, *data.GetShapeEdges( eV1 ));
5641 if ( eV0->_nodes.back() == eV1->_nodes.back() ) // closed edge
5643 int iPeriodic = helper.GetPeriodicIndex();
5644 if ( iPeriodic == 1 || iPeriodic == 2 )
5646 uvV1.SetCoord( iPeriodic, helper.GetOtherParam( uvV1.Coord( iPeriodic )));
5647 if ( uvV0.Coord( iPeriodic ) > uvV1.Coord( iPeriodic ))
5648 std::swap( uvV0, uvV1 );
5651 for ( int iEnd = 0; iEnd < 2; ++iEnd )
5653 iFrom = _eToSmooth[ iEnd ].first, iTo = _eToSmooth[ iEnd ].second;
5654 if ( iFrom >= iTo ) continue;
5655 _LayerEdge* e0 = _eos[iFrom]->_2neibors->_edges[0];
5656 _LayerEdge* e1 = _eos[iTo-1]->_2neibors->_edges[1];
5657 gp_XY uv0 = ( e0 == eV0 ) ? uvV0 : e0->LastUV( F, _eos );
5658 gp_XY uv1 = ( e1 == eV1 ) ? uvV1 : e1->LastUV( F, _eos );
5659 double param0 = ( iFrom == 0 ) ? 0. : _leParams[ iFrom-1 ];
5660 double param1 = _leParams[ iTo ];
5661 const gp_XY rangeUV = uv1 - uv0;
5662 for ( size_t i = iFrom; i < iTo; ++i )
5664 if ( _eos[i]->Is( _LayerEdge::BLOCKED )) continue;
5665 double param = ( _leParams[i] - param0 ) / ( param1 - param0 );
5666 gp_XY newUV = uv0 + param * rangeUV;
5667 _eos[i]->_pos.back().SetCoord( newUV.X(), newUV.Y(), 0 );
5669 gp_Pnt newPos = surface->Value( newUV.X(), newUV.Y() );
5670 SMDS_MeshNode* tgtNode = const_cast<SMDS_MeshNode*>( _eos[i]->_nodes.back() );
5671 tgtNode->setXYZ( newPos.X(), newPos.Y(), newPos.Z() );
5672 dumpMove( tgtNode );
5674 SMDS_FacePosition* pos = static_cast<SMDS_FacePosition*>( tgtNode->GetPosition() );
5675 pos->SetUParameter( newUV.X() );
5676 pos->SetVParameter( newUV.Y() );
5683 if ( _anaCurve->IsKind( STANDARD_TYPE( Geom_Circle )))
5685 Handle(Geom_Circle) circle = Handle(Geom_Circle)::DownCast( _anaCurve );
5686 gp_Pnt center3D = circle->Location();
5688 if ( F.IsNull() ) // 3D
5690 if ( getLEdgeOnV( 0 )->_nodes.back() == getLEdgeOnV( 1 )->_nodes.back() )
5691 return true; // closed EDGE - nothing to do
5693 // circle is a real curve of EDGE
5694 gp_Circ circ = circle->Circ();
5696 // new center is shifted along its axis
5697 const gp_Dir& axis = circ.Axis().Direction();
5698 _LayerEdge* e0 = getLEdgeOnV(0);
5699 _LayerEdge* e1 = getLEdgeOnV(1);
5700 SMESH_TNodeXYZ p0 = e0->_nodes.back();
5701 SMESH_TNodeXYZ p1 = e1->_nodes.back();
5702 double shift1 = axis.XYZ() * ( p0 - center3D.XYZ() );
5703 double shift2 = axis.XYZ() * ( p1 - center3D.XYZ() );
5704 gp_Pnt newCenter = center3D.XYZ() + axis.XYZ() * 0.5 * ( shift1 + shift2 );
5706 double newRadius = 0.5 * ( newCenter.Distance( p0 ) + newCenter.Distance( p1 ));
5708 gp_Ax2 newAxis( newCenter, axis, gp_Vec( newCenter, p0 ));
5709 gp_Circ newCirc( newAxis, newRadius );
5710 gp_Vec vecC1 ( newCenter, p1 );
5712 double uLast = newAxis.XDirection().AngleWithRef( vecC1, newAxis.Direction() ); // -PI - +PI
5716 for ( size_t i = 0; i < _eos.size(); ++i )
5718 if ( _eos[i]->Is( _LayerEdge::BLOCKED )) continue;
5719 //if ( !_eos[i]->Is( _LayerEdge::TO_SMOOTH )) continue;
5720 double u = uLast * _leParams[i];
5721 gp_Pnt p = ElCLib::Value( u, newCirc );
5722 _eos._edges[i]->_pos.back() = p.XYZ();
5724 SMDS_MeshNode* tgtNode = const_cast<SMDS_MeshNode*>( _eos._edges[i]->_nodes.back() );
5725 tgtNode->setXYZ( p.X(), p.Y(), p.Z() );
5726 dumpMove( tgtNode );
5732 const gp_XY center( center3D.X(), center3D.Y() );
5734 _LayerEdge* e0 = getLEdgeOnV(0);
5735 _LayerEdge* eM = _eos._edges[ 0 ];
5736 _LayerEdge* e1 = getLEdgeOnV(1);
5737 gp_XY uv0 = e0->LastUV( F, *data.GetShapeEdges( e0 ) );
5738 gp_XY uvM = eM->LastUV( F, *data.GetShapeEdges( eM ) );
5739 gp_XY uv1 = e1->LastUV( F, *data.GetShapeEdges( e1 ) );
5740 gp_Vec2d vec0( center, uv0 );
5741 gp_Vec2d vecM( center, uvM );
5742 gp_Vec2d vec1( center, uv1 );
5743 double uLast = vec0.Angle( vec1 ); // -PI - +PI
5744 double uMidl = vec0.Angle( vecM );
5745 if ( uLast * uMidl <= 0. )
5746 uLast += ( uMidl > 0 ? +2. : -2. ) * M_PI;
5747 const double radius = 0.5 * ( vec0.Magnitude() + vec1.Magnitude() );
5749 gp_Ax2d axis( center, vec0 );
5750 gp_Circ2d circ( axis, radius );
5751 for ( size_t i = 0; i < _eos.size(); ++i )
5753 if ( _eos[i]->Is( _LayerEdge::BLOCKED )) continue;
5754 //if ( !_eos[i]->Is( _LayerEdge::TO_SMOOTH )) continue;
5755 double newU = uLast * _leParams[i];
5756 gp_Pnt2d newUV = ElCLib::Value( newU, circ );
5757 _eos._edges[i]->_pos.back().SetCoord( newUV.X(), newUV.Y(), 0 );
5759 gp_Pnt newPos = surface->Value( newUV.X(), newUV.Y() );
5760 SMDS_MeshNode* tgtNode = const_cast<SMDS_MeshNode*>( _eos._edges[i]->_nodes.back() );
5761 tgtNode->setXYZ( newPos.X(), newPos.Y(), newPos.Z() );
5762 dumpMove( tgtNode );
5764 SMDS_FacePosition* pos = static_cast<SMDS_FacePosition*>( tgtNode->GetPosition() );
5765 pos->SetUParameter( newUV.X() );
5766 pos->SetVParameter( newUV.Y() );
5775 //================================================================================
5777 * \brief smooth _LayerEdge's on a an EDGE
5779 //================================================================================
5781 bool _Smoother1D::smoothComplexEdge( _SolidData& data,
5782 Handle(ShapeAnalysis_Surface)& surface,
5783 const TopoDS_Face& F,
5784 SMESH_MesherHelper& helper)
5786 if ( _offPoints.empty() )
5789 // ----------------------------------------------
5790 // move _offPoints along normals of _LayerEdge's
5791 // ----------------------------------------------
5793 _LayerEdge* e[2] = { getLEdgeOnV(0), getLEdgeOnV(1) };
5794 if ( e[0]->Is( _LayerEdge::NORMAL_UPDATED ))
5795 _leOnV[0]._normal = getNormalNormal( e[0]->_normal, _edgeDir[0] );
5796 if ( e[1]->Is( _LayerEdge::NORMAL_UPDATED ))
5797 _leOnV[1]._normal = getNormalNormal( e[1]->_normal, _edgeDir[1] );
5798 _leOnV[0]._len = e[0]->_len;
5799 _leOnV[1]._len = e[1]->_len;
5800 for ( size_t i = 0; i < _offPoints.size(); i++ )
5802 _LayerEdge* e0 = _offPoints[i]._2edges._edges[0];
5803 _LayerEdge* e1 = _offPoints[i]._2edges._edges[1];
5804 const double w0 = _offPoints[i]._2edges._wgt[0];
5805 const double w1 = _offPoints[i]._2edges._wgt[1];
5806 gp_XYZ avgNorm = ( e0->_normal * w0 + e1->_normal * w1 ).Normalized();
5807 double avgLen = ( e0->_len * w0 + e1->_len * w1 );
5808 double avgFact = ( e0->_lenFactor * w0 + e1->_lenFactor * w1 );
5809 if ( e0->Is( _LayerEdge::NORMAL_UPDATED ) ||
5810 e1->Is( _LayerEdge::NORMAL_UPDATED ))
5811 avgNorm = getNormalNormal( avgNorm, _offPoints[i]._edgeDir );
5813 _offPoints[i]._xyz += avgNorm * ( avgLen - _offPoints[i]._len ) * avgFact;
5814 _offPoints[i]._len = avgLen;
5818 if ( !surface.IsNull() ) // project _offPoints to the FACE
5820 fTol = 100 * BRep_Tool::Tolerance( F );
5821 //const double segLen = _offPoints[0].Distance( _offPoints[1] );
5823 gp_Pnt2d uv = surface->ValueOfUV( _offPoints[0]._xyz, fTol );
5824 //if ( surface->Gap() < 0.5 * segLen )
5825 _offPoints[0]._xyz = surface->Value( uv ).XYZ();
5827 for ( size_t i = 1; i < _offPoints.size(); ++i )
5829 uv = surface->NextValueOfUV( uv, _offPoints[i]._xyz, fTol );
5830 //if ( surface->Gap() < 0.5 * segLen )
5831 _offPoints[i]._xyz = surface->Value( uv ).XYZ();
5835 // -----------------------------------------------------------------
5836 // project tgt nodes of extreme _LayerEdge's to the offset segments
5837 // -----------------------------------------------------------------
5839 if ( e[0]->Is( _LayerEdge::NORMAL_UPDATED )) _iSeg[0] = 0;
5840 if ( e[1]->Is( _LayerEdge::NORMAL_UPDATED )) _iSeg[1] = _offPoints.size()-2;
5842 gp_Pnt pExtreme[2], pProj[2];
5843 for ( int is2nd = 0; is2nd < 2; ++is2nd )
5845 pExtreme[ is2nd ] = SMESH_TNodeXYZ( e[is2nd]->_nodes.back() );
5846 int i = _iSeg[ is2nd ];
5847 int di = is2nd ? -1 : +1;
5848 bool projected = false;
5849 double uOnSeg, distMin = Precision::Infinite(), dist, distPrev = 0;
5852 gp_Vec v0p( _offPoints[i]._xyz, pExtreme[ is2nd ] );
5853 gp_Vec v01( _offPoints[i]._xyz, _offPoints[i+1]._xyz );
5854 uOnSeg = ( v0p * v01 ) / v01.SquareMagnitude(); // param [0,1] along v01
5855 projected = ( Abs( uOnSeg - 0.5 ) <= 0.5 );
5856 dist = pExtreme[ is2nd ].SquareDistance( _offPoints[ i + ( uOnSeg > 0.5 )]._xyz );
5857 if ( dist < distMin || projected )
5860 pProj[ is2nd ] = _offPoints[i]._xyz + ( v01 * uOnSeg ).XYZ();
5863 else if ( dist > distPrev )
5865 if ( ++nbWorse > 3 ) // avoid projection to the middle of a closed EDGE
5871 while ( !projected &&
5872 i >= 0 && i+1 < (int)_offPoints.size() );
5876 if (( is2nd && _iSeg[1] != _offPoints.size()-2 ) || ( !is2nd && _iSeg[0] != 0 ))
5879 _iSeg[1] = _offPoints.size()-2;
5880 debugMsg( "smoothComplexEdge() failed to project nodes of extreme _LayerEdge's" );
5885 if ( _iSeg[0] > _iSeg[1] )
5887 debugMsg( "smoothComplexEdge() incorrectly projected nodes of extreme _LayerEdge's" );
5891 // adjust length of extreme LE (test viscous_layers_01/B7)
5892 gp_Vec vDiv0( pExtreme[0], pProj[0] );
5893 gp_Vec vDiv1( pExtreme[1], pProj[1] );
5894 double d0 = vDiv0.Magnitude();
5895 double d1 = vDiv1.Magnitude();
5896 if ( e[0]->_normal * vDiv0.XYZ() < 0 ) e[0]->_len += d0;
5897 else e[0]->_len -= d0;
5898 if ( e[1]->_normal * vDiv1.XYZ() < 0 ) e[1]->_len += d1;
5899 else e[1]->_len -= d1;
5901 // ---------------------------------------------------------------------------------
5902 // compute normalized length of the offset segments located between the projections
5903 // ---------------------------------------------------------------------------------
5905 size_t iSeg = 0, nbSeg = _iSeg[1] - _iSeg[0] + 1;
5906 vector< double > len( nbSeg + 1 );
5908 len[ iSeg++ ] = pProj[ 0 ].Distance( _offPoints[ _iSeg[0]+1 ]._xyz )/* * e[0]->_lenFactor*/;
5909 for ( size_t i = _iSeg[0]+1; i <= _iSeg[1]; ++i, ++iSeg )
5911 len[ iSeg ] = len[ iSeg-1 ] + _offPoints[i].Distance( _offPoints[i+1] );
5913 len[ nbSeg ] -= pProj[ 1 ].Distance( _offPoints[ _iSeg[1]+1 ]._xyz )/* * e[1]->_lenFactor*/;
5915 // d0 *= e[0]->_lenFactor;
5916 // d1 *= e[1]->_lenFactor;
5917 double fullLen = len.back() - d0 - d1;
5918 for ( iSeg = 0; iSeg < len.size(); ++iSeg )
5919 len[iSeg] = ( len[iSeg] - d0 ) / fullLen;
5921 // temporary replace extreme _offPoints by pExtreme
5922 gp_XYZ op[2] = { _offPoints[ _iSeg[0] ]._xyz,
5923 _offPoints[ _iSeg[1]+1 ]._xyz };
5924 _offPoints[ _iSeg[0] ]._xyz = pExtreme[0].XYZ();
5925 _offPoints[ _iSeg[1]+ 1]._xyz = pExtreme[1].XYZ();
5927 // -------------------------------------------------------------
5928 // distribute tgt nodes of _LayerEdge's between the projections
5929 // -------------------------------------------------------------
5932 for ( size_t i = 0; i < _eos.size(); ++i )
5934 if ( _eos[i]->Is( _LayerEdge::BLOCKED )) continue;
5935 //if ( !_eos[i]->Is( _LayerEdge::TO_SMOOTH )) continue;
5936 while ( iSeg+2 < len.size() && _leParams[i] > len[ iSeg+1 ] )
5938 double r = ( _leParams[i] - len[ iSeg ]) / ( len[ iSeg+1 ] - len[ iSeg ]);
5939 gp_XYZ p = ( _offPoints[ iSeg + _iSeg[0] ]._xyz * ( 1 - r ) +
5940 _offPoints[ iSeg + _iSeg[0] + 1 ]._xyz * r );
5942 if ( surface.IsNull() )
5944 _eos[i]->_pos.back() = p;
5946 else // project a new node position to a FACE
5948 gp_Pnt2d uv ( _eos[i]->_pos.back().X(), _eos[i]->_pos.back().Y() );
5949 gp_Pnt2d uv2( surface->NextValueOfUV( uv, p, fTol ));
5951 p = surface->Value( uv2 ).XYZ();
5952 _eos[i]->_pos.back().SetCoord( uv2.X(), uv2.Y(), 0 );
5954 SMDS_MeshNode* tgtNode = const_cast<SMDS_MeshNode*>( _eos[i]->_nodes.back() );
5955 tgtNode->setXYZ( p.X(), p.Y(), p.Z() );
5956 dumpMove( tgtNode );
5959 _offPoints[ _iSeg[0] ]._xyz = op[0];
5960 _offPoints[ _iSeg[1]+1 ]._xyz = op[1];
5965 //================================================================================
5967 * \brief Prepare for smoothing
5969 //================================================================================
5971 void _Smoother1D::prepare(_SolidData& data)
5973 const TopoDS_Edge& E = TopoDS::Edge( _eos._shape );
5974 _curveLen = SMESH_Algo::EdgeLength( E );
5976 // sort _LayerEdge's by position on the EDGE
5977 data.SortOnEdge( E, _eos._edges );
5979 // compute normalized param of _eos._edges on EDGE
5980 _leParams.resize( _eos._edges.size() + 1 );
5983 gp_Pnt pPrev = SMESH_TNodeXYZ( getLEdgeOnV( 0 )->_nodes[0] );
5985 for ( size_t i = 0; i < _eos._edges.size(); ++i )
5987 gp_Pnt p = SMESH_TNodeXYZ( _eos._edges[i]->_nodes[0] );
5988 curLen = p.Distance( pPrev );
5989 _leParams[i+1] = _leParams[i] + curLen;
5992 double fullLen = _leParams.back() + pPrev.Distance( SMESH_TNodeXYZ( getLEdgeOnV(1)->_nodes[0]));
5993 for ( size_t i = 0; i < _leParams.size()-1; ++i )
5994 _leParams[i] = _leParams[i+1] / fullLen;
5995 _leParams.back() = 1.;
5998 _LayerEdge* leOnV[2] = { getLEdgeOnV(0), getLEdgeOnV(1) };
6000 // get cosin to use in findEdgesToSmooth()
6001 _edgeDir[0] = getEdgeDir( E, leOnV[0]->_nodes[0], data.GetHelper() );
6002 _edgeDir[1] = getEdgeDir( E, leOnV[1]->_nodes[0], data.GetHelper() );
6003 _leOnV[0]._cosin = Abs( leOnV[0]->_cosin );
6004 _leOnV[1]._cosin = Abs( leOnV[1]->_cosin );
6005 if ( _eos._sWOL.IsNull() ) // 3D
6006 for ( int iEnd = 0; iEnd < 2; ++iEnd )
6007 _leOnV[iEnd]._cosin = Abs( _edgeDir[iEnd].Normalized() * leOnV[iEnd]->_normal );
6012 // divide E to have offset segments with low deflection
6013 BRepAdaptor_Curve c3dAdaptor( E );
6014 const double curDeflect = 0.1; //0.3; // 0.01; // Curvature deflection
6015 const double angDeflect = 0.1; //0.2; // 0.09; // Angular deflection
6016 GCPnts_TangentialDeflection discret(c3dAdaptor, angDeflect, curDeflect);
6017 if ( discret.NbPoints() <= 2 )
6019 _anaCurve = new Geom_Line( gp::OX() ); // only type does matter
6023 const double u0 = c3dAdaptor.FirstParameter();
6024 gp_Pnt p; gp_Vec tangent;
6025 _offPoints.resize( discret.NbPoints() );
6026 for ( size_t i = 0; i < _offPoints.size(); i++ )
6028 double u = discret.Parameter( i+1 );
6029 c3dAdaptor.D1( u, p, tangent );
6030 _offPoints[i]._xyz = p.XYZ();
6031 _offPoints[i]._edgeDir = tangent.XYZ();
6032 _offPoints[i]._param = GCPnts_AbscissaPoint::Length( c3dAdaptor, u0, u ) / _curveLen;
6036 _offPoints [0]._2edges.set( &_leOnV[0], &_leOnV[0], 0.5, 0.5 );
6037 _offPoints.back()._2edges.set( &_leOnV[1], &_leOnV[1], 0.5, 0.5 );
6038 _2NearEdges tmp2edges;
6039 tmp2edges._edges[1] = _eos._edges[0];
6040 _leOnV[0]._2neibors = & tmp2edges;
6041 _leOnV[0]._nodes = leOnV[0]->_nodes;
6042 _leOnV[1]._nodes = leOnV[1]->_nodes;
6043 _LayerEdge* eNext, *ePrev = & _leOnV[0];
6044 for ( size_t iLE = 0, i = 1; i < _offPoints.size()-1; i++ )
6046 // find _LayerEdge's located before and after an offset point
6047 // (_eos._edges[ iLE ] is next after ePrev)
6048 while ( iLE < _eos._edges.size() && _offPoints[i]._param > _leParams[ iLE ] )
6049 ePrev = _eos._edges[ iLE++ ];
6050 eNext = ePrev->_2neibors->_edges[1];
6052 gp_Pnt p0 = SMESH_TNodeXYZ( ePrev->_nodes[0] );
6053 gp_Pnt p1 = SMESH_TNodeXYZ( eNext->_nodes[0] );
6054 double r = p0.Distance( _offPoints[i]._xyz ) / p0.Distance( p1 );
6055 _offPoints[i]._2edges.set( ePrev, eNext, 1-r, r );
6058 // replace _LayerEdge's on VERTEX by _leOnV in _offPoints._2edges
6059 for ( size_t i = 0; i < _offPoints.size(); i++ )
6060 if ( _offPoints[i]._2edges._edges[0] == leOnV[0] )
6061 _offPoints[i]._2edges._edges[0] = & _leOnV[0];
6063 for ( size_t i = _offPoints.size()-1; i > 0; i-- )
6064 if ( _offPoints[i]._2edges._edges[1] == leOnV[1] )
6065 _offPoints[i]._2edges._edges[1] = & _leOnV[1];
6068 // set _normal of _leOnV[0] and _leOnV[1] to be normal to the EDGE
6070 int iLBO = _offPoints.size() - 2; // last but one
6072 _leOnV[ 0 ]._normal = getNormalNormal( leOnV[0]->_normal, _edgeDir[0] );
6073 _leOnV[ 1 ]._normal = getNormalNormal( leOnV[1]->_normal, _edgeDir[1] );
6074 _leOnV[ 0 ]._len = 0;
6075 _leOnV[ 1 ]._len = 0;
6076 _leOnV[ 0 ]._lenFactor = _offPoints[1 ]._2edges._edges[1]->_lenFactor;
6077 _leOnV[ 1 ]._lenFactor = _offPoints[iLBO]._2edges._edges[0]->_lenFactor;
6080 _iSeg[1] = _offPoints.size()-2;
6082 // initialize OffPnt::_len
6083 for ( size_t i = 0; i < _offPoints.size(); ++i )
6084 _offPoints[i]._len = 0;
6086 if ( _eos._edges[0]->NbSteps() > 1 ) // already inflated several times, init _xyz
6088 _leOnV[0]._len = leOnV[0]->_len;
6089 _leOnV[1]._len = leOnV[1]->_len;
6090 for ( size_t i = 0; i < _offPoints.size(); i++ )
6092 _LayerEdge* e0 = _offPoints[i]._2edges._edges[0];
6093 _LayerEdge* e1 = _offPoints[i]._2edges._edges[1];
6094 const double w0 = _offPoints[i]._2edges._wgt[0];
6095 const double w1 = _offPoints[i]._2edges._wgt[1];
6096 double avgLen = ( e0->_len * w0 + e1->_len * w1 );
6097 gp_XYZ avgXYZ = ( SMESH_TNodeXYZ( e0->_nodes.back() ) * w0 +
6098 SMESH_TNodeXYZ( e1->_nodes.back() ) * w1 );
6099 _offPoints[i]._xyz = avgXYZ;
6100 _offPoints[i]._len = avgLen;
6105 //================================================================================
6107 * \brief set _normal of _leOnV[is2nd] to be normal to the EDGE
6109 //================================================================================
6111 gp_XYZ _Smoother1D::getNormalNormal( const gp_XYZ & normal,
6112 const gp_XYZ& edgeDir)
6114 gp_XYZ cross = normal ^ edgeDir;
6115 gp_XYZ norm = edgeDir ^ cross;
6116 double size = norm.Modulus();
6121 //================================================================================
6123 * \brief Sort _LayerEdge's by a parameter on a given EDGE
6125 //================================================================================
6127 void _SolidData::SortOnEdge( const TopoDS_Edge& E,
6128 vector< _LayerEdge* >& edges)
6130 map< double, _LayerEdge* > u2edge;
6131 for ( size_t i = 0; i < edges.size(); ++i )
6132 u2edge.insert( u2edge.end(),
6133 make_pair( _helper->GetNodeU( E, edges[i]->_nodes[0] ), edges[i] ));
6135 ASSERT( u2edge.size() == edges.size() );
6136 map< double, _LayerEdge* >::iterator u2e = u2edge.begin();
6137 for ( size_t i = 0; i < edges.size(); ++i, ++u2e )
6138 edges[i] = u2e->second;
6140 Sort2NeiborsOnEdge( edges );
6143 //================================================================================
6145 * \brief Set _2neibors according to the order of _LayerEdge on EDGE
6147 //================================================================================
6149 void _SolidData::Sort2NeiborsOnEdge( vector< _LayerEdge* >& edges )
6151 if ( edges.size() < 2 || !edges[0]->_2neibors ) return;
6153 for ( size_t i = 0; i < edges.size()-1; ++i )
6154 if ( edges[i]->_2neibors->tgtNode(1) != edges[i+1]->_nodes.back() )
6155 edges[i]->_2neibors->reverse();
6157 const size_t iLast = edges.size() - 1;
6158 if ( edges.size() > 1 &&
6159 edges[iLast]->_2neibors->tgtNode(0) != edges[iLast-1]->_nodes.back() )
6160 edges[iLast]->_2neibors->reverse();
6163 //================================================================================
6165 * \brief Return _EdgesOnShape* corresponding to the shape
6167 //================================================================================
6169 _EdgesOnShape* _SolidData::GetShapeEdges(const TGeomID shapeID )
6171 if ( shapeID < (int)_edgesOnShape.size() &&
6172 _edgesOnShape[ shapeID ]._shapeID == shapeID )
6173 return _edgesOnShape[ shapeID ]._subMesh ? & _edgesOnShape[ shapeID ] : 0;
6175 for ( size_t i = 0; i < _edgesOnShape.size(); ++i )
6176 if ( _edgesOnShape[i]._shapeID == shapeID )
6177 return _edgesOnShape[i]._subMesh ? & _edgesOnShape[i] : 0;
6182 //================================================================================
6184 * \brief Return _EdgesOnShape* corresponding to the shape
6186 //================================================================================
6188 _EdgesOnShape* _SolidData::GetShapeEdges(const TopoDS_Shape& shape )
6190 SMESHDS_Mesh* meshDS = _proxyMesh->GetMesh()->GetMeshDS();
6191 return GetShapeEdges( meshDS->ShapeToIndex( shape ));
6194 //================================================================================
6196 * \brief Prepare data of the _LayerEdge for smoothing on FACE
6198 //================================================================================
6200 void _SolidData::PrepareEdgesToSmoothOnFace( _EdgesOnShape* eos, bool substituteSrcNodes )
6202 SMESH_MesherHelper helper( *_proxyMesh->GetMesh() );
6204 set< TGeomID > vertices;
6206 if ( eos->ShapeType() == TopAbs_FACE )
6208 // check FACE concavity and get concave VERTEXes
6209 F = TopoDS::Face( eos->_shape );
6210 if ( isConcave( F, helper, &vertices ))
6211 _concaveFaces.insert( eos->_shapeID );
6213 // set eos._eosConcaVer
6214 eos->_eosConcaVer.clear();
6215 eos->_eosConcaVer.reserve( vertices.size() );
6216 for ( set< TGeomID >::iterator v = vertices.begin(); v != vertices.end(); ++v )
6218 _EdgesOnShape* eov = GetShapeEdges( *v );
6219 if ( eov && eov->_edges.size() == 1 )
6221 eos->_eosConcaVer.push_back( eov );
6222 for ( size_t i = 0; i < eov->_edges[0]->_neibors.size(); ++i )
6223 eov->_edges[0]->_neibors[i]->Set( _LayerEdge::DIFFICULT );
6227 // SetSmooLen() to _LayerEdge's on FACE
6228 for ( size_t i = 0; i < eos->_edges.size(); ++i )
6230 eos->_edges[i]->SetSmooLen( Precision::Infinite() );
6232 SMESH_subMeshIteratorPtr smIt = eos->_subMesh->getDependsOnIterator(/*includeSelf=*/false);
6233 while ( smIt->more() ) // loop on sub-shapes of the FACE
6235 _EdgesOnShape* eoe = GetShapeEdges( smIt->next()->GetId() );
6236 if ( !eoe ) continue;
6238 vector<_LayerEdge*>& eE = eoe->_edges;
6239 for ( size_t iE = 0; iE < eE.size(); ++iE ) // loop on _LayerEdge's on EDGE or VERTEX
6241 if ( eE[iE]->_cosin <= theMinSmoothCosin )
6244 SMDS_ElemIteratorPtr segIt = eE[iE]->_nodes[0]->GetInverseElementIterator(SMDSAbs_Edge);
6245 while ( segIt->more() )
6247 const SMDS_MeshElement* seg = segIt->next();
6248 if ( !eos->_subMesh->DependsOn( seg->getshapeId() ))
6250 if ( seg->GetNode(0) != eE[iE]->_nodes[0] )
6251 continue; // not to check a seg twice
6252 for ( size_t iN = 0; iN < eE[iE]->_neibors.size(); ++iN )
6254 _LayerEdge* eN = eE[iE]->_neibors[iN];
6255 if ( eN->_nodes[0]->getshapeId() != eos->_shapeID )
6257 double dist = SMESH_MeshAlgos::GetDistance( seg, SMESH_TNodeXYZ( eN->_nodes[0] ));
6258 double smooLen = getSmoothingThickness( eE[iE]->_cosin, dist );
6259 eN->SetSmooLen( Min( smooLen, eN->GetSmooLen() ));
6260 eN->Set( _LayerEdge::NEAR_BOUNDARY );
6265 } // if ( eos->ShapeType() == TopAbs_FACE )
6267 for ( size_t i = 0; i < eos->_edges.size(); ++i )
6269 eos->_edges[i]->_smooFunction = 0;
6270 eos->_edges[i]->Set( _LayerEdge::TO_SMOOTH );
6272 bool isCurved = false;
6273 for ( size_t i = 0; i < eos->_edges.size(); ++i )
6275 _LayerEdge* edge = eos->_edges[i];
6277 // get simplices sorted
6278 _Simplex::SortSimplices( edge->_simplices );
6280 // smoothing function
6281 edge->ChooseSmooFunction( vertices, _n2eMap );
6284 double avgNormProj = 0, avgLen = 0;
6285 for ( size_t iS = 0; iS < edge->_simplices.size(); ++iS )
6287 _Simplex& s = edge->_simplices[iS];
6289 gp_XYZ vec = edge->_pos.back() - SMESH_TNodeXYZ( s._nPrev );
6290 avgNormProj += edge->_normal * vec;
6291 avgLen += vec.Modulus();
6292 if ( substituteSrcNodes )
6294 s._nNext = _n2eMap[ s._nNext ]->_nodes.back();
6295 s._nPrev = _n2eMap[ s._nPrev ]->_nodes.back();
6298 avgNormProj /= edge->_simplices.size();
6299 avgLen /= edge->_simplices.size();
6300 if (( edge->_curvature = _Curvature::New( avgNormProj, avgLen )))
6303 SMDS_FacePosition* fPos = dynamic_cast<SMDS_FacePosition*>( edge->_nodes[0]->GetPosition() );
6305 for ( size_t iS = 0; iS < edge->_simplices.size() && !fPos; ++iS )
6306 fPos = dynamic_cast<SMDS_FacePosition*>( edge->_simplices[iS]._nPrev->GetPosition() );
6308 edge->_curvature->_uv.SetCoord( fPos->GetUParameter(), fPos->GetVParameter() );
6312 // prepare for putOnOffsetSurface()
6313 if (( eos->ShapeType() == TopAbs_FACE ) &&
6314 ( isCurved || !eos->_eosConcaVer.empty() ))
6316 eos->_offsetSurf = helper.GetSurface( TopoDS::Face( eos->_shape ));
6317 eos->_edgeForOffset = 0;
6319 double maxCosin = -1;
6320 for ( TopExp_Explorer eExp( eos->_shape, TopAbs_EDGE ); eExp.More(); eExp.Next() )
6322 _EdgesOnShape* eoe = GetShapeEdges( eExp.Current() );
6323 if ( !eoe || eoe->_edges.empty() ) continue;
6325 vector<_LayerEdge*>& eE = eoe->_edges;
6326 _LayerEdge* e = eE[ eE.size() / 2 ];
6327 if ( e->_cosin > maxCosin )
6329 eos->_edgeForOffset = e;
6330 maxCosin = e->_cosin;
6336 //================================================================================
6338 * \brief Add faces for smoothing
6340 //================================================================================
6342 void _SolidData::AddShapesToSmooth( const set< _EdgesOnShape* >& eosToSmooth,
6343 const set< _EdgesOnShape* >* edgesNoAnaSmooth )
6345 set< _EdgesOnShape * >::const_iterator eos = eosToSmooth.begin();
6346 for ( ; eos != eosToSmooth.end(); ++eos )
6348 if ( !*eos || (*eos)->_toSmooth ) continue;
6350 (*eos)->_toSmooth = true;
6352 if ( (*eos)->ShapeType() == TopAbs_FACE )
6354 PrepareEdgesToSmoothOnFace( *eos, /*substituteSrcNodes=*/false );
6355 (*eos)->_toSmooth = true;
6359 // avoid _Smoother1D::smoothAnalyticEdge() of edgesNoAnaSmooth
6360 if ( edgesNoAnaSmooth )
6361 for ( eos = edgesNoAnaSmooth->begin(); eos != edgesNoAnaSmooth->end(); ++eos )
6363 if ( (*eos)->_edgeSmoother )
6364 (*eos)->_edgeSmoother->_anaCurve.Nullify();
6368 //================================================================================
6370 * \brief Limit _LayerEdge::_maxLen according to local curvature
6372 //================================================================================
6374 void _ViscousBuilder::limitMaxLenByCurvature( _SolidData& data, SMESH_MesherHelper& helper )
6376 // find intersection of neighbor _LayerEdge's to limit _maxLen
6377 // according to local curvature (IPAL52648)
6379 // This method must be called after findCollisionEdges() where _LayerEdge's
6380 // get _lenFactor initialized in the case of eos._hyp.IsOffsetMethod()
6382 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
6384 _EdgesOnShape& eosI = data._edgesOnShape[iS];
6385 if ( eosI._edges.empty() ) continue;
6386 if ( !eosI._hyp.ToSmooth() )
6388 for ( size_t i = 0; i < eosI._edges.size(); ++i )
6390 _LayerEdge* eI = eosI._edges[i];
6391 for ( size_t iN = 0; iN < eI->_neibors.size(); ++iN )
6393 _LayerEdge* eN = eI->_neibors[iN];
6394 if ( eI->_nodes[0]->GetID() < eN->_nodes[0]->GetID() ) // treat this pair once
6396 _EdgesOnShape* eosN = data.GetShapeEdges( eN );
6397 limitMaxLenByCurvature( eI, eN, eosI, *eosN, helper );
6402 else if ( eosI.ShapeType() == TopAbs_EDGE )
6404 const TopoDS_Edge& E = TopoDS::Edge( eosI._shape );
6405 if ( SMESH_Algo::IsStraight( E, /*degenResult=*/true )) continue;
6407 _LayerEdge* e0 = eosI._edges[0];
6408 for ( size_t i = 1; i < eosI._edges.size(); ++i )
6410 _LayerEdge* eI = eosI._edges[i];
6411 limitMaxLenByCurvature( eI, e0, eosI, eosI, helper );
6418 //================================================================================
6420 * \brief Limit _LayerEdge::_maxLen according to local curvature
6422 //================================================================================
6424 void _ViscousBuilder::limitMaxLenByCurvature( _LayerEdge* e1,
6426 _EdgesOnShape& eos1,
6427 _EdgesOnShape& eos2,
6428 SMESH_MesherHelper& helper )
6430 gp_XYZ plnNorm = e1->_normal ^ e2->_normal;
6431 double norSize = plnNorm.SquareModulus();
6432 if ( norSize < std::numeric_limits<double>::min() )
6433 return; // parallel normals
6435 // find closest points of skew _LayerEdge's
6436 SMESH_TNodeXYZ src1( e1->_nodes[0] ), src2( e2->_nodes[0] );
6437 gp_XYZ dir12 = src2 - src1;
6438 gp_XYZ perp1 = e1->_normal ^ plnNorm;
6439 gp_XYZ perp2 = e2->_normal ^ plnNorm;
6440 double dot1 = perp2 * e1->_normal;
6441 double dot2 = perp1 * e2->_normal;
6442 double u1 = ( perp2 * dir12 ) / dot1;
6443 double u2 = - ( perp1 * dir12 ) / dot2;
6444 if ( u1 > 0 && u2 > 0 )
6446 double ovl = ( u1 * e1->_normal * dir12 -
6447 u2 * e2->_normal * dir12 ) / dir12.SquareModulus();
6448 if ( ovl > theSmoothThickToElemSizeRatio )
6450 e1->_maxLen = Min( e1->_maxLen, 0.75 * u1 / e1->_lenFactor );
6451 e2->_maxLen = Min( e2->_maxLen, 0.75 * u2 / e2->_lenFactor );
6456 //================================================================================
6458 * \brief Fill data._collisionEdges
6460 //================================================================================
6462 void _ViscousBuilder::findCollisionEdges( _SolidData& data, SMESH_MesherHelper& helper )
6464 data._collisionEdges.clear();
6466 // set the full thickness of the layers to LEs
6467 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
6469 _EdgesOnShape& eos = data._edgesOnShape[iS];
6470 if ( eos._edges.empty() ) continue;
6471 if ( eos.ShapeType() != TopAbs_EDGE && eos.ShapeType() != TopAbs_VERTEX ) continue;
6473 for ( size_t i = 0; i < eos._edges.size(); ++i )
6475 if ( eos._edges[i]->Is( _LayerEdge::BLOCKED )) continue;
6476 double maxLen = eos._edges[i]->_maxLen;
6477 eos._edges[i]->_maxLen = Precision::Infinite(); // avoid blocking
6478 eos._edges[i]->SetNewLength( 1.5 * maxLen, eos, helper );
6479 eos._edges[i]->_maxLen = maxLen;
6483 // make temporary quadrangles got by extrusion of
6484 // mesh edges along _LayerEdge._normal's
6486 vector< const SMDS_MeshElement* > tmpFaces;
6488 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
6490 _EdgesOnShape& eos = data._edgesOnShape[ iS ];
6491 if ( eos.ShapeType() != TopAbs_EDGE )
6493 if ( eos._edges.empty() )
6495 _LayerEdge* edge[2] = { 0, 0 }; // LE of 2 VERTEX'es
6496 SMESH_subMeshIteratorPtr smIt = eos._subMesh->getDependsOnIterator(/*includeSelf=*/false);
6497 while ( smIt->more() )
6498 if ( _EdgesOnShape* eov = data.GetShapeEdges( smIt->next()->GetId() ))
6499 if ( eov->_edges.size() == 1 )
6500 edge[ bool( edge[0]) ] = eov->_edges[0];
6504 _TmpMeshFaceOnEdge* f = new _TmpMeshFaceOnEdge( edge[0], edge[1], --_tmpFaceID );
6505 tmpFaces.push_back( f );
6508 for ( size_t i = 0; i < eos._edges.size(); ++i )
6510 _LayerEdge* edge = eos._edges[i];
6511 for ( int j = 0; j < 2; ++j ) // loop on _2NearEdges
6513 const SMDS_MeshNode* src2 = edge->_2neibors->srcNode(j);
6514 if ( src2->GetPosition()->GetDim() > 0 &&
6515 src2->GetID() < edge->_nodes[0]->GetID() )
6516 continue; // avoid using same segment twice
6518 // a _LayerEdge containg tgt2
6519 _LayerEdge* neiborEdge = edge->_2neibors->_edges[j];
6521 _TmpMeshFaceOnEdge* f = new _TmpMeshFaceOnEdge( edge, neiborEdge, --_tmpFaceID );
6522 tmpFaces.push_back( f );
6527 // Find _LayerEdge's intersecting tmpFaces.
6529 SMDS_ElemIteratorPtr fIt( new SMDS_ElementVectorIterator( tmpFaces.begin(),
6531 SMESHUtils::Deleter<SMESH_ElementSearcher> searcher
6532 ( SMESH_MeshAlgos::GetElementSearcher( *getMeshDS(), fIt ));
6534 double dist1, dist2, segLen, eps = 0.5;
6535 _CollisionEdges collEdges;
6536 vector< const SMDS_MeshElement* > suspectFaces;
6537 const double angle45 = Cos( 45. * M_PI / 180. );
6539 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
6541 _EdgesOnShape& eos = data._edgesOnShape[ iS ];
6542 if ( eos.ShapeType() == TopAbs_FACE || !eos._sWOL.IsNull() )
6544 // find sub-shapes whose VL can influence VL on eos
6545 set< TGeomID > neighborShapes;
6546 PShapeIteratorPtr fIt = helper.GetAncestors( eos._shape, *_mesh, TopAbs_FACE );
6547 while ( const TopoDS_Shape* face = fIt->next() )
6549 TGeomID faceID = getMeshDS()->ShapeToIndex( *face );
6550 if ( _EdgesOnShape* eof = data.GetShapeEdges( faceID ))
6552 SMESH_subMeshIteratorPtr subIt = eof->_subMesh->getDependsOnIterator(/*includeSelf=*/false);
6553 while ( subIt->more() )
6554 neighborShapes.insert( subIt->next()->GetId() );
6557 if ( eos.ShapeType() == TopAbs_VERTEX )
6559 PShapeIteratorPtr eIt = helper.GetAncestors( eos._shape, *_mesh, TopAbs_EDGE );
6560 while ( const TopoDS_Shape* edge = eIt->next() )
6561 neighborShapes.erase( getMeshDS()->ShapeToIndex( *edge ));
6563 // find intersecting _LayerEdge's
6564 for ( size_t i = 0; i < eos._edges.size(); ++i )
6566 if ( eos._edges[i]->Is( _LayerEdge::MULTI_NORMAL )) continue;
6567 _LayerEdge* edge = eos._edges[i];
6568 gp_Ax1 lastSegment = edge->LastSegment( segLen, eos );
6571 gp_Vec eSegDir0, eSegDir1;
6572 if ( edge->IsOnEdge() )
6574 SMESH_TNodeXYZ eP( edge->_nodes[0] );
6575 eSegDir0 = SMESH_TNodeXYZ( edge->_2neibors->srcNode(0) ) - eP;
6576 eSegDir1 = SMESH_TNodeXYZ( edge->_2neibors->srcNode(1) ) - eP;
6578 suspectFaces.clear();
6579 searcher->GetElementsInSphere( SMESH_TNodeXYZ( edge->_nodes.back()), edge->_len * 2,
6580 SMDSAbs_Face, suspectFaces );
6581 collEdges._intEdges.clear();
6582 for ( size_t j = 0 ; j < suspectFaces.size(); ++j )
6584 const _TmpMeshFaceOnEdge* f = (const _TmpMeshFaceOnEdge*) suspectFaces[j];
6585 if ( f->_le1 == edge || f->_le2 == edge ) continue;
6586 if ( !neighborShapes.count( f->_le1->_nodes[0]->getshapeId() )) continue;
6587 if ( !neighborShapes.count( f->_le2->_nodes[0]->getshapeId() )) continue;
6588 if ( edge->IsOnEdge() ) {
6589 if ( edge->_2neibors->include( f->_le1 ) ||
6590 edge->_2neibors->include( f->_le2 )) continue;
6593 if (( f->_le1->IsOnEdge() && f->_le1->_2neibors->include( edge )) ||
6594 ( f->_le2->IsOnEdge() && f->_le2->_2neibors->include( edge ))) continue;
6596 dist1 = dist2 = Precision::Infinite();
6597 if ( !edge->SegTriaInter( lastSegment, f->_nn[0], f->_nn[1], f->_nn[2], dist1, eps ))
6598 dist1 = Precision::Infinite();
6599 if ( !edge->SegTriaInter( lastSegment, f->_nn[3], f->_nn[2], f->_nn[0], dist2, eps ))
6600 dist2 = Precision::Infinite();
6601 if (( dist1 > segLen ) && ( dist2 > segLen ))
6604 if ( edge->IsOnEdge() )
6606 // skip perpendicular EDGEs
6607 gp_Vec fSegDir = SMESH_TNodeXYZ( f->_nn[0] ) - SMESH_TNodeXYZ( f->_nn[3] );
6608 bool isParallel = ( isLessAngle( eSegDir0, fSegDir, angle45 ) ||
6609 isLessAngle( eSegDir1, fSegDir, angle45 ) ||
6610 isLessAngle( eSegDir0, fSegDir.Reversed(), angle45 ) ||
6611 isLessAngle( eSegDir1, fSegDir.Reversed(), angle45 ));
6616 // either limit inflation of edges or remember them for updating _normal
6617 // double dot = edge->_normal * f->GetDir();
6620 collEdges._intEdges.push_back( f->_le1 );
6621 collEdges._intEdges.push_back( f->_le2 );
6625 // double shortLen = 0.75 * ( Min( dist1, dist2 ) / edge->_lenFactor );
6626 // edge->_maxLen = Min( shortLen, edge->_maxLen );
6630 if ( !collEdges._intEdges.empty() )
6632 collEdges._edge = edge;
6633 data._collisionEdges.push_back( collEdges );
6638 for ( size_t i = 0 ; i < tmpFaces.size(); ++i )
6641 // restore the zero thickness
6642 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
6644 _EdgesOnShape& eos = data._edgesOnShape[iS];
6645 if ( eos._edges.empty() ) continue;
6646 if ( eos.ShapeType() != TopAbs_EDGE && eos.ShapeType() != TopAbs_VERTEX ) continue;
6648 for ( size_t i = 0; i < eos._edges.size(); ++i )
6650 eos._edges[i]->InvalidateStep( 1, eos );
6651 eos._edges[i]->_len = 0;
6656 //================================================================================
6658 * \brief Find _LayerEdge's located on boundary of a convex FACE whose normal
6659 * will be updated at each inflation step
6661 //================================================================================
6663 void _ViscousBuilder::findEdgesToUpdateNormalNearConvexFace( _ConvexFace & convFace,
6665 SMESH_MesherHelper& helper )
6667 const TGeomID convFaceID = getMeshDS()->ShapeToIndex( convFace._face );
6668 const double preci = BRep_Tool::Tolerance( convFace._face );
6669 Handle(ShapeAnalysis_Surface) surface = helper.GetSurface( convFace._face );
6671 bool edgesToUpdateFound = false;
6673 map< TGeomID, _EdgesOnShape* >::iterator id2eos = convFace._subIdToEOS.begin();
6674 for ( ; id2eos != convFace._subIdToEOS.end(); ++id2eos )
6676 _EdgesOnShape& eos = * id2eos->second;
6677 if ( !eos._sWOL.IsNull() ) continue;
6678 if ( !eos._hyp.ToSmooth() ) continue;
6679 for ( size_t i = 0; i < eos._edges.size(); ++i )
6681 _LayerEdge* ledge = eos._edges[ i ];
6682 if ( ledge->Is( _LayerEdge::UPD_NORMAL_CONV )) continue; // already checked
6683 if ( ledge->Is( _LayerEdge::MULTI_NORMAL )) continue; // not inflatable
6685 gp_XYZ tgtPos = ( SMESH_NodeXYZ( ledge->_nodes[0] ) +
6686 ledge->_normal * ledge->_lenFactor * ledge->_maxLen );
6688 // the normal must be updated if distance from tgtPos to surface is less than
6691 // find an initial UV for search of a projection of tgtPos to surface
6692 const SMDS_MeshNode* nodeInFace = 0;
6693 SMDS_ElemIteratorPtr fIt = ledge->_nodes[0]->GetInverseElementIterator(SMDSAbs_Face);
6694 while ( fIt->more() && !nodeInFace )
6696 const SMDS_MeshElement* f = fIt->next();
6697 if ( convFaceID != f->getshapeId() ) continue;
6699 SMDS_ElemIteratorPtr nIt = f->nodesIterator();
6700 while ( nIt->more() && !nodeInFace )
6702 const SMDS_MeshElement* n = nIt->next();
6703 if ( n->getshapeId() == convFaceID )
6704 nodeInFace = static_cast< const SMDS_MeshNode* >( n );
6709 gp_XY uv = helper.GetNodeUV( convFace._face, nodeInFace );
6712 surface->NextValueOfUV( uv, tgtPos, preci );
6713 double dist = surface->Gap();
6714 if ( dist < 0.95 * ledge->_maxLen )
6716 ledge->Set( _LayerEdge::UPD_NORMAL_CONV );
6717 if ( !ledge->_curvature ) ledge->_curvature = new _Curvature;
6718 ledge->_curvature->_uv.SetCoord( uv.X(), uv.Y() );
6719 edgesToUpdateFound = true;
6724 if ( !convFace._isTooCurved && edgesToUpdateFound )
6726 data._convexFaces.insert( make_pair( convFaceID, convFace )).first->second;
6730 //================================================================================
6732 * \brief Modify normals of _LayerEdge's on EDGE's to avoid intersection with
6733 * _LayerEdge's on neighbor EDGE's
6735 //================================================================================
6737 bool _ViscousBuilder::updateNormals( _SolidData& data,
6738 SMESH_MesherHelper& helper,
6742 updateNormalsOfC1Vertices( data );
6744 if ( stepNb > 0 && !updateNormalsOfConvexFaces( data, helper, stepNb ))
6747 // map to store new _normal and _cosin for each intersected edge
6748 map< _LayerEdge*, _LayerEdge, _LayerEdgeCmp > edge2newEdge;
6749 map< _LayerEdge*, _LayerEdge, _LayerEdgeCmp >::iterator e2neIt;
6750 _LayerEdge zeroEdge;
6751 zeroEdge._normal.SetCoord( 0,0,0 );
6752 zeroEdge._maxLen = Precision::Infinite();
6753 zeroEdge._nodes.resize(1); // to init _TmpMeshFaceOnEdge
6755 set< _EdgesOnShape* > shapesToSmooth, edgesNoAnaSmooth;
6757 double segLen, dist1, dist2, dist;
6758 vector< pair< _LayerEdge*, double > > intEdgesDist;
6759 _TmpMeshFaceOnEdge quad( &zeroEdge, &zeroEdge, 0 );
6761 for ( int iter = 0; iter < 5; ++iter )
6763 edge2newEdge.clear();
6765 for ( size_t iE = 0; iE < data._collisionEdges.size(); ++iE )
6767 _CollisionEdges& ce = data._collisionEdges[iE];
6768 _LayerEdge* edge1 = ce._edge;
6769 if ( !edge1 /*|| edge1->Is( _LayerEdge::BLOCKED )*/) continue;
6770 _EdgesOnShape* eos1 = data.GetShapeEdges( edge1 );
6771 if ( !eos1 ) continue;
6773 // detect intersections
6774 gp_Ax1 lastSeg = edge1->LastSegment( segLen, *eos1 );
6775 double testLen = 1.5 * edge1->_maxLen * edge1->_lenFactor;
6777 intEdgesDist.clear();
6778 double minIntDist = Precision::Infinite();
6779 for ( size_t i = 0; i < ce._intEdges.size(); i += 2 )
6781 if ( edge1->Is( _LayerEdge::BLOCKED ) &&
6782 ce._intEdges[i ]->Is( _LayerEdge::BLOCKED ) &&
6783 ce._intEdges[i+1]->Is( _LayerEdge::BLOCKED ))
6785 double dot = edge1->_normal * quad.GetDir( ce._intEdges[i], ce._intEdges[i+1] );
6786 double fact = ( 1.1 + dot * dot );
6787 SMESH_TNodeXYZ pSrc0( ce.nSrc(i) ), pSrc1( ce.nSrc(i+1) );
6788 SMESH_TNodeXYZ pTgt0( ce.nTgt(i) ), pTgt1( ce.nTgt(i+1) );
6789 gp_XYZ pLast0 = pSrc0 + ( pTgt0 - pSrc0 ) * fact;
6790 gp_XYZ pLast1 = pSrc1 + ( pTgt1 - pSrc1 ) * fact;
6791 dist1 = dist2 = Precision::Infinite();
6792 if ( !edge1->SegTriaInter( lastSeg, pSrc0, pLast0, pSrc1, dist1, eps ) &&
6793 !edge1->SegTriaInter( lastSeg, pSrc1, pLast1, pLast0, dist2, eps ))
6796 if ( dist > testLen || dist <= 0 )
6799 if ( dist > testLen || dist <= 0 )
6802 // choose a closest edge
6803 gp_Pnt intP( lastSeg.Location().XYZ() + lastSeg.Direction().XYZ() * ( dist + segLen ));
6804 double d1 = intP.SquareDistance( pSrc0 );
6805 double d2 = intP.SquareDistance( pSrc1 );
6806 int iClose = i + ( d2 < d1 );
6807 _LayerEdge* edge2 = ce._intEdges[iClose];
6808 edge2->Unset( _LayerEdge::MARKED );
6810 // choose a closest edge among neighbors
6811 gp_Pnt srcP( SMESH_TNodeXYZ( edge1->_nodes[0] ));
6812 d1 = srcP.SquareDistance( SMESH_TNodeXYZ( edge2->_nodes[0] ));
6813 for ( size_t j = 0; j < intEdgesDist.size(); ++j )
6815 _LayerEdge * edgeJ = intEdgesDist[j].first;
6816 if ( edge2->IsNeiborOnEdge( edgeJ ))
6818 d2 = srcP.SquareDistance( SMESH_TNodeXYZ( edgeJ->_nodes[0] ));
6819 ( d1 < d2 ? edgeJ : edge2 )->Set( _LayerEdge::MARKED );
6822 intEdgesDist.push_back( make_pair( edge2, dist ));
6823 // if ( Abs( d2 - d1 ) / Max( d2, d1 ) < 0.5 )
6825 // iClose = i + !( d2 < d1 );
6826 // intEdges.push_back( ce._intEdges[iClose] );
6827 // ce._intEdges[iClose]->Unset( _LayerEdge::MARKED );
6829 minIntDist = Min( edge1->_len * edge1->_lenFactor - segLen + dist, minIntDist );
6834 // compute new _normals
6835 for ( size_t i = 0; i < intEdgesDist.size(); ++i )
6837 _LayerEdge* edge2 = intEdgesDist[i].first;
6838 double distWgt = edge1->_len / intEdgesDist[i].second;
6839 // if ( edge1->Is( _LayerEdge::BLOCKED ) &&
6840 // edge2->Is( _LayerEdge::BLOCKED )) continue;
6841 if ( edge2->Is( _LayerEdge::MARKED )) continue;
6842 edge2->Set( _LayerEdge::MARKED );
6845 gp_XYZ dir1 = edge1->_normal, dir2 = edge2->_normal;
6847 double cos1 = Abs( edge1->_cosin ), cos2 = Abs( edge2->_cosin );
6848 double wgt1 = ( cos1 + 0.001 ) / ( cos1 + cos2 + 0.002 );
6849 double wgt2 = ( cos2 + 0.001 ) / ( cos1 + cos2 + 0.002 );
6850 // double cos1 = Abs( edge1->_cosin ), cos2 = Abs( edge2->_cosin );
6851 // double sgn1 = 0.1 * ( 1 + edge1->_cosin ), sgn2 = 0.1 * ( 1 + edge2->_cosin );
6852 // double wgt1 = ( cos1 + sgn1 ) / ( cos1 + cos2 + sgn1 + sgn2 );
6853 // double wgt2 = ( cos2 + sgn2 ) / ( cos1 + cos2 + sgn1 + sgn2 );
6854 gp_XYZ newNormal = wgt1 * dir1 + wgt2 * dir2;
6855 newNormal.Normalize();
6859 double sgn1 = edge1->_cosin / cos1, sgn2 = edge2->_cosin / cos2;
6860 if ( cos1 < theMinSmoothCosin )
6862 newCos = cos2 * sgn1;
6864 else if ( cos2 > theMinSmoothCosin ) // both cos1 and cos2 > theMinSmoothCosin
6866 newCos = ( wgt1 * cos1 + wgt2 * cos2 ) * edge1->_cosin / cos1;
6870 newCos = edge1->_cosin;
6873 e2neIt = edge2newEdge.insert( make_pair( edge1, zeroEdge )).first;
6874 e2neIt->second._normal += distWgt * newNormal;
6875 e2neIt->second._cosin = newCos;
6876 e2neIt->second._maxLen = 0.7 * minIntDist / edge1->_lenFactor;
6877 if ( iter > 0 && sgn1 * sgn2 < 0 && edge1->_cosin < 0 )
6878 e2neIt->second._normal += dir2;
6879 e2neIt = edge2newEdge.insert( make_pair( edge2, zeroEdge )).first;
6880 e2neIt->second._normal += distWgt * newNormal;
6881 e2neIt->second._cosin = edge2->_cosin;
6882 if ( iter > 0 && sgn1 * sgn2 < 0 && edge2->_cosin < 0 )
6883 e2neIt->second._normal += dir1;
6887 if ( edge2newEdge.empty() )
6888 break; //return true;
6890 dumpFunction(SMESH_Comment("updateNormals")<< data._index << "_" << stepNb << "_it" << iter);
6892 // Update data of edges depending on a new _normal
6895 for ( e2neIt = edge2newEdge.begin(); e2neIt != edge2newEdge.end(); ++e2neIt )
6897 _LayerEdge* edge = e2neIt->first;
6898 if ( edge->Is( _LayerEdge::BLOCKED )) continue;
6899 _LayerEdge& newEdge = e2neIt->second;
6900 _EdgesOnShape* eos = data.GetShapeEdges( edge );
6902 // Check if a new _normal is OK:
6903 newEdge._normal.Normalize();
6904 if ( !isNewNormalOk( data, *edge, newEdge._normal ))
6906 if ( newEdge._maxLen < edge->_len && iter > 0 ) // limit _maxLen
6908 edge->InvalidateStep( stepNb + 1, *eos, /*restoreLength=*/true );
6909 edge->_maxLen = newEdge._maxLen;
6910 edge->SetNewLength( newEdge._maxLen, *eos, helper );
6912 continue; // the new _normal is bad
6914 // the new _normal is OK
6916 // find shapes that need smoothing due to change of _normal
6917 if ( edge->_cosin < theMinSmoothCosin &&
6918 newEdge._cosin > theMinSmoothCosin )
6920 if ( eos->_sWOL.IsNull() )
6922 SMDS_ElemIteratorPtr fIt = edge->_nodes[0]->GetInverseElementIterator(SMDSAbs_Face);
6923 while ( fIt->more() )
6924 shapesToSmooth.insert( data.GetShapeEdges( fIt->next()->getshapeId() ));
6926 else // edge inflates along a FACE
6928 TopoDS_Shape V = helper.GetSubShapeByNode( edge->_nodes[0], getMeshDS() );
6929 PShapeIteratorPtr eIt = helper.GetAncestors( V, *_mesh, TopAbs_EDGE, &eos->_sWOL );
6930 while ( const TopoDS_Shape* E = eIt->next() )
6932 gp_Vec edgeDir = getEdgeDir( TopoDS::Edge( *E ), TopoDS::Vertex( V ));
6933 double angle = edgeDir.Angle( newEdge._normal ); // [0,PI]
6934 if ( angle < M_PI / 2 )
6935 shapesToSmooth.insert( data.GetShapeEdges( *E ));
6940 double len = edge->_len;
6941 edge->InvalidateStep( stepNb + 1, *eos, /*restoreLength=*/true );
6942 edge->SetNormal( newEdge._normal );
6943 edge->SetCosin( newEdge._cosin );
6944 edge->SetNewLength( len, *eos, helper );
6945 edge->Set( _LayerEdge::MARKED );
6946 edge->Set( _LayerEdge::NORMAL_UPDATED );
6947 edgesNoAnaSmooth.insert( eos );
6950 // Update normals and other dependent data of not intersecting _LayerEdge's
6951 // neighboring the intersecting ones
6953 for ( e2neIt = edge2newEdge.begin(); e2neIt != edge2newEdge.end(); ++e2neIt )
6955 _LayerEdge* edge1 = e2neIt->first;
6956 _EdgesOnShape* eos1 = data.GetShapeEdges( edge1 );
6957 if ( !edge1->Is( _LayerEdge::MARKED ))
6960 if ( edge1->IsOnEdge() )
6962 const SMDS_MeshNode * n1 = edge1->_2neibors->srcNode(0);
6963 const SMDS_MeshNode * n2 = edge1->_2neibors->srcNode(1);
6964 edge1->SetDataByNeighbors( n1, n2, *eos1, helper );
6967 if ( !edge1->_2neibors || !eos1->_sWOL.IsNull() )
6969 for ( int j = 0; j < 2; ++j ) // loop on 2 neighbors
6971 _LayerEdge* neighbor = edge1->_2neibors->_edges[j];
6972 if ( neighbor->Is( _LayerEdge::MARKED ) /*edge2newEdge.count ( neighbor )*/)
6973 continue; // j-th neighbor is also intersected
6974 _LayerEdge* prevEdge = edge1;
6975 const int nbSteps = 10;
6976 for ( int step = nbSteps; step; --step ) // step from edge1 in j-th direction
6978 if ( neighbor->Is( _LayerEdge::BLOCKED ) ||
6979 neighbor->Is( _LayerEdge::MARKED ))
6981 _EdgesOnShape* eos = data.GetShapeEdges( neighbor );
6982 if ( !eos ) continue;
6983 _LayerEdge* nextEdge = neighbor;
6984 if ( neighbor->_2neibors )
6987 nextEdge = neighbor->_2neibors->_edges[iNext];
6988 if ( nextEdge == prevEdge )
6989 nextEdge = neighbor->_2neibors->_edges[ ++iNext ];
6991 double r = double(step-1)/nbSteps/(iter+1);
6992 if ( !nextEdge->_2neibors )
6995 gp_XYZ newNorm = prevEdge->_normal * r + nextEdge->_normal * (1-r);
6996 newNorm.Normalize();
6997 if ( !isNewNormalOk( data, *neighbor, newNorm ))
7000 double len = neighbor->_len;
7001 neighbor->InvalidateStep( stepNb + 1, *eos, /*restoreLength=*/true );
7002 neighbor->SetNormal( newNorm );
7003 neighbor->SetCosin( prevEdge->_cosin * r + nextEdge->_cosin * (1-r) );
7004 if ( neighbor->_2neibors )
7005 neighbor->SetDataByNeighbors( prevEdge->_nodes[0], nextEdge->_nodes[0], *eos, helper );
7006 neighbor->SetNewLength( len, *eos, helper );
7007 neighbor->Set( _LayerEdge::MARKED );
7008 neighbor->Set( _LayerEdge::NORMAL_UPDATED );
7009 edgesNoAnaSmooth.insert( eos );
7011 if ( !neighbor->_2neibors )
7012 break; // neighbor is on VERTEX
7014 // goto the next neighbor
7015 prevEdge = neighbor;
7016 neighbor = nextEdge;
7023 data.AddShapesToSmooth( shapesToSmooth, &edgesNoAnaSmooth );
7028 //================================================================================
7030 * \brief Check if a new normal is OK
7032 //================================================================================
7034 bool _ViscousBuilder::isNewNormalOk( _SolidData& data,
7036 const gp_XYZ& newNormal)
7038 // check a min angle between the newNormal and surrounding faces
7039 vector<_Simplex> simplices;
7040 SMESH_TNodeXYZ n0( edge._nodes[0] ), n1, n2;
7041 _Simplex::GetSimplices( n0._node, simplices, data._ignoreFaceIds, &data );
7042 double newMinDot = 1, curMinDot = 1;
7043 for ( size_t i = 0; i < simplices.size(); ++i )
7045 n1.Set( simplices[i]._nPrev );
7046 n2.Set( simplices[i]._nNext );
7047 gp_XYZ normFace = ( n1 - n0 ) ^ ( n2 - n0 );
7048 double normLen2 = normFace.SquareModulus();
7049 if ( normLen2 < std::numeric_limits<double>::min() )
7051 normFace /= Sqrt( normLen2 );
7052 newMinDot = Min( newNormal * normFace, newMinDot );
7053 curMinDot = Min( edge._normal * normFace, curMinDot );
7056 if ( newMinDot < 0.5 )
7058 ok = ( newMinDot >= curMinDot * 0.9 );
7059 //return ( newMinDot >= ( curMinDot * ( 0.8 + 0.1 * edge.NbSteps() )));
7060 // double initMinDot2 = 1. - edge._cosin * edge._cosin;
7061 // return ( newMinDot * newMinDot ) >= ( 0.8 * initMinDot2 );
7067 //================================================================================
7069 * \brief Modify normals of _LayerEdge's on FACE to reflex smoothing
7071 //================================================================================
7073 bool _ViscousBuilder::updateNormalsOfSmoothed( _SolidData& data,
7074 SMESH_MesherHelper& helper,
7076 const double stepSize )
7078 if ( data._nbShapesToSmooth == 0 || nbSteps == 0 )
7079 return true; // no shapes needing smoothing
7081 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
7083 _EdgesOnShape& eos = data._edgesOnShape[ iS ];
7084 if ( //!eos._toSmooth || _eosC1 have _toSmooth == false
7085 !eos._hyp.ToSmooth() ||
7086 eos.ShapeType() != TopAbs_FACE ||
7087 eos._edges.empty() )
7090 bool toSmooth = ( eos._edges[ 0 ]->NbSteps() >= nbSteps+1 );
7091 if ( !toSmooth ) continue;
7093 for ( size_t i = 0; i < eos._edges.size(); ++i )
7095 _LayerEdge* edge = eos._edges[i];
7096 if ( !edge->Is( _LayerEdge::SMOOTHED ))
7098 if ( edge->Is( _LayerEdge::DIFFICULT ) && nbSteps != 1 )
7101 const gp_XYZ& pPrev = edge->PrevPos();
7102 const gp_XYZ& pLast = edge->_pos.back();
7103 gp_XYZ stepVec = pLast - pPrev;
7104 double realStepSize = stepVec.Modulus();
7105 if ( realStepSize < numeric_limits<double>::min() )
7108 edge->_lenFactor = realStepSize / stepSize;
7109 edge->_normal = stepVec / realStepSize;
7110 edge->Set( _LayerEdge::NORMAL_UPDATED );
7117 //================================================================================
7119 * \brief Modify normals of _LayerEdge's on C1 VERTEXes
7121 //================================================================================
7123 void _ViscousBuilder::updateNormalsOfC1Vertices( _SolidData& data )
7125 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
7127 _EdgesOnShape& eov = data._edgesOnShape[ iS ];
7128 if ( eov._eosC1.empty() ||
7129 eov.ShapeType() != TopAbs_VERTEX ||
7130 eov._edges.empty() )
7133 gp_XYZ newNorm = eov._edges[0]->_normal;
7134 double curThick = eov._edges[0]->_len * eov._edges[0]->_lenFactor;
7135 bool normChanged = false;
7137 for ( size_t i = 0; i < eov._eosC1.size(); ++i )
7139 _EdgesOnShape* eoe = eov._eosC1[i];
7140 const TopoDS_Edge& e = TopoDS::Edge( eoe->_shape );
7141 const double eLen = SMESH_Algo::EdgeLength( e );
7142 TopoDS_Shape oppV = SMESH_MesherHelper::IthVertex( 0, e );
7143 if ( oppV.IsSame( eov._shape ))
7144 oppV = SMESH_MesherHelper::IthVertex( 1, e );
7145 _EdgesOnShape* eovOpp = data.GetShapeEdges( oppV );
7146 if ( !eovOpp || eovOpp->_edges.empty() ) continue;
7147 if ( eov._edges[0]->Is( _LayerEdge::BLOCKED )) continue;
7149 double curThickOpp = eovOpp->_edges[0]->_len * eovOpp->_edges[0]->_lenFactor;
7150 if ( curThickOpp + curThick < eLen )
7153 double wgt = 2. * curThick / eLen;
7154 newNorm += wgt * eovOpp->_edges[0]->_normal;
7159 eov._edges[0]->SetNormal( newNorm.Normalized() );
7160 eov._edges[0]->Set( _LayerEdge::NORMAL_UPDATED );
7165 //================================================================================
7167 * \brief Modify normals of _LayerEdge's on _ConvexFace's
7169 //================================================================================
7171 bool _ViscousBuilder::updateNormalsOfConvexFaces( _SolidData& data,
7172 SMESH_MesherHelper& helper,
7175 SMESHDS_Mesh* meshDS = helper.GetMeshDS();
7178 map< TGeomID, _ConvexFace >::iterator id2face = data._convexFaces.begin();
7179 for ( ; id2face != data._convexFaces.end(); ++id2face )
7181 _ConvexFace & convFace = (*id2face).second;
7182 convFace._normalsFixedOnBorders = false; // to update at each inflation step
7184 if ( convFace._normalsFixed )
7185 continue; // already fixed
7186 if ( convFace.CheckPrisms() )
7187 continue; // nothing to fix
7189 convFace._normalsFixed = true;
7191 BRepAdaptor_Surface surface ( convFace._face, false );
7192 BRepLProp_SLProps surfProp( surface, 2, 1e-6 );
7194 // check if the convex FACE is of spherical shape
7196 Bnd_B3d centersBox; // bbox of centers of curvature of _LayerEdge's on VERTEXes
7200 map< TGeomID, _EdgesOnShape* >::iterator id2eos = convFace._subIdToEOS.begin();
7201 for ( ; id2eos != convFace._subIdToEOS.end(); ++id2eos )
7203 _EdgesOnShape& eos = *(id2eos->second);
7204 if ( eos.ShapeType() == TopAbs_VERTEX )
7206 _LayerEdge* ledge = eos._edges[ 0 ];
7207 if ( convFace.GetCenterOfCurvature( ledge, surfProp, helper, center ))
7208 centersBox.Add( center );
7210 for ( size_t i = 0; i < eos._edges.size(); ++i )
7211 nodesBox.Add( SMESH_TNodeXYZ( eos._edges[ i ]->_nodes[0] ));
7213 if ( centersBox.IsVoid() )
7215 debugMsg( "Error: centersBox.IsVoid()" );
7218 const bool isSpherical =
7219 ( centersBox.SquareExtent() < 1e-6 * nodesBox.SquareExtent() );
7221 int nbEdges = helper.Count( convFace._face, TopAbs_EDGE, /*ignoreSame=*/false );
7222 vector < _CentralCurveOnEdge > centerCurves( nbEdges );
7226 // set _LayerEdge::_normal as average of all normals
7228 // WARNING: different density of nodes on EDGEs is not taken into account that
7229 // can lead to an improper new normal
7231 gp_XYZ avgNormal( 0,0,0 );
7233 id2eos = convFace._subIdToEOS.begin();
7234 for ( ; id2eos != convFace._subIdToEOS.end(); ++id2eos )
7236 _EdgesOnShape& eos = *(id2eos->second);
7237 // set data of _CentralCurveOnEdge
7238 if ( eos.ShapeType() == TopAbs_EDGE )
7240 _CentralCurveOnEdge& ceCurve = centerCurves[ nbEdges++ ];
7241 ceCurve.SetShapes( TopoDS::Edge( eos._shape ), convFace, data, helper );
7242 if ( !eos._sWOL.IsNull() )
7243 ceCurve._adjFace.Nullify();
7245 ceCurve._ledges.insert( ceCurve._ledges.end(),
7246 eos._edges.begin(), eos._edges.end());
7248 // summarize normals
7249 for ( size_t i = 0; i < eos._edges.size(); ++i )
7250 avgNormal += eos._edges[ i ]->_normal;
7252 double normSize = avgNormal.SquareModulus();
7253 if ( normSize < 1e-200 )
7255 debugMsg( "updateNormalsOfConvexFaces(): zero avgNormal" );
7258 avgNormal /= Sqrt( normSize );
7260 // compute new _LayerEdge::_cosin on EDGEs
7261 double avgCosin = 0;
7264 for ( size_t iE = 0; iE < centerCurves.size(); ++iE )
7266 _CentralCurveOnEdge& ceCurve = centerCurves[ iE ];
7267 if ( ceCurve._adjFace.IsNull() )
7269 for ( size_t iLE = 0; iLE < ceCurve._ledges.size(); ++iLE )
7271 const SMDS_MeshNode* node = ceCurve._ledges[ iLE ]->_nodes[0];
7272 inFaceDir = getFaceDir( ceCurve._adjFace, ceCurve._edge, node, helper, isOK );
7275 double angle = inFaceDir.Angle( avgNormal ); // [0,PI]
7276 ceCurve._ledges[ iLE ]->_cosin = Cos( angle );
7277 avgCosin += ceCurve._ledges[ iLE ]->_cosin;
7283 avgCosin /= nbCosin;
7285 // set _LayerEdge::_normal = avgNormal
7286 id2eos = convFace._subIdToEOS.begin();
7287 for ( ; id2eos != convFace._subIdToEOS.end(); ++id2eos )
7289 _EdgesOnShape& eos = *(id2eos->second);
7290 if ( eos.ShapeType() != TopAbs_EDGE )
7291 for ( size_t i = 0; i < eos._edges.size(); ++i )
7292 eos._edges[ i ]->_cosin = avgCosin;
7294 for ( size_t i = 0; i < eos._edges.size(); ++i )
7296 eos._edges[ i ]->SetNormal( avgNormal );
7297 eos._edges[ i ]->Set( _LayerEdge::NORMAL_UPDATED );
7301 else // if ( isSpherical )
7303 // We suppose that centers of curvature at all points of the FACE
7304 // lie on some curve, let's call it "central curve". For all _LayerEdge's
7305 // having a common center of curvature we define the same new normal
7306 // as a sum of normals of _LayerEdge's on EDGEs among them.
7308 // get all centers of curvature for each EDGE
7310 helper.SetSubShape( convFace._face );
7311 _LayerEdge* vertexLEdges[2], **edgeLEdge, **edgeLEdgeEnd;
7313 TopExp_Explorer edgeExp( convFace._face, TopAbs_EDGE );
7314 for ( int iE = 0; edgeExp.More(); edgeExp.Next(), ++iE )
7316 const TopoDS_Edge& edge = TopoDS::Edge( edgeExp.Current() );
7318 // set adjacent FACE
7319 centerCurves[ iE ].SetShapes( edge, convFace, data, helper );
7321 // get _LayerEdge's of the EDGE
7322 TGeomID edgeID = meshDS->ShapeToIndex( edge );
7323 _EdgesOnShape* eos = data.GetShapeEdges( edgeID );
7324 if ( !eos || eos->_edges.empty() )
7326 // no _LayerEdge's on EDGE, use _LayerEdge's on VERTEXes
7327 for ( int iV = 0; iV < 2; ++iV )
7329 TopoDS_Vertex v = helper.IthVertex( iV, edge );
7330 TGeomID vID = meshDS->ShapeToIndex( v );
7331 eos = data.GetShapeEdges( vID );
7332 vertexLEdges[ iV ] = eos->_edges[ 0 ];
7334 edgeLEdge = &vertexLEdges[0];
7335 edgeLEdgeEnd = edgeLEdge + 2;
7337 centerCurves[ iE ]._adjFace.Nullify();
7341 if ( ! eos->_toSmooth )
7342 data.SortOnEdge( edge, eos->_edges );
7343 edgeLEdge = &eos->_edges[ 0 ];
7344 edgeLEdgeEnd = edgeLEdge + eos->_edges.size();
7345 vertexLEdges[0] = eos->_edges.front()->_2neibors->_edges[0];
7346 vertexLEdges[1] = eos->_edges.back() ->_2neibors->_edges[1];
7348 if ( ! eos->_sWOL.IsNull() )
7349 centerCurves[ iE ]._adjFace.Nullify();
7352 // Get curvature centers
7356 if ( edgeLEdge[0]->IsOnEdge() &&
7357 convFace.GetCenterOfCurvature( vertexLEdges[0], surfProp, helper, center ))
7359 centerCurves[ iE ].Append( center, vertexLEdges[0] );
7360 centersBox.Add( center );
7362 for ( ; edgeLEdge < edgeLEdgeEnd; ++edgeLEdge )
7363 if ( convFace.GetCenterOfCurvature( *edgeLEdge, surfProp, helper, center ))
7364 { // EDGE or VERTEXes
7365 centerCurves[ iE ].Append( center, *edgeLEdge );
7366 centersBox.Add( center );
7368 if ( edgeLEdge[-1]->IsOnEdge() &&
7369 convFace.GetCenterOfCurvature( vertexLEdges[1], surfProp, helper, center ))
7371 centerCurves[ iE ].Append( center, vertexLEdges[1] );
7372 centersBox.Add( center );
7374 centerCurves[ iE ]._isDegenerated =
7375 ( centersBox.IsVoid() || centersBox.SquareExtent() < 1e-6 * nodesBox.SquareExtent() );
7377 } // loop on EDGES of convFace._face to set up data of centerCurves
7379 // Compute new normals for _LayerEdge's on EDGEs
7381 double avgCosin = 0;
7384 for ( size_t iE1 = 0; iE1 < centerCurves.size(); ++iE1 )
7386 _CentralCurveOnEdge& ceCurve = centerCurves[ iE1 ];
7387 if ( ceCurve._isDegenerated )
7389 const vector< gp_Pnt >& centers = ceCurve._curvaCenters;
7390 vector< gp_XYZ > & newNormals = ceCurve._normals;
7391 for ( size_t iC1 = 0; iC1 < centers.size(); ++iC1 )
7394 for ( size_t iE2 = 0; iE2 < centerCurves.size() && !isOK; ++iE2 )
7397 isOK = centerCurves[ iE2 ].FindNewNormal( centers[ iC1 ], newNormals[ iC1 ]);
7399 if ( isOK && !ceCurve._adjFace.IsNull() )
7401 // compute new _LayerEdge::_cosin
7402 const SMDS_MeshNode* node = ceCurve._ledges[ iC1 ]->_nodes[0];
7403 inFaceDir = getFaceDir( ceCurve._adjFace, ceCurve._edge, node, helper, isOK );
7406 double angle = inFaceDir.Angle( newNormals[ iC1 ] ); // [0,PI]
7407 ceCurve._ledges[ iC1 ]->_cosin = Cos( angle );
7408 avgCosin += ceCurve._ledges[ iC1 ]->_cosin;
7414 // set new normals to _LayerEdge's of NOT degenerated central curves
7415 for ( size_t iE = 0; iE < centerCurves.size(); ++iE )
7417 if ( centerCurves[ iE ]._isDegenerated )
7419 for ( size_t iLE = 0; iLE < centerCurves[ iE ]._ledges.size(); ++iLE )
7421 centerCurves[ iE ]._ledges[ iLE ]->SetNormal( centerCurves[ iE ]._normals[ iLE ]);
7422 centerCurves[ iE ]._ledges[ iLE ]->Set( _LayerEdge::NORMAL_UPDATED );
7425 // set new normals to _LayerEdge's of degenerated central curves
7426 for ( size_t iE = 0; iE < centerCurves.size(); ++iE )
7428 if ( !centerCurves[ iE ]._isDegenerated ||
7429 centerCurves[ iE ]._ledges.size() < 3 )
7431 // new normal is an average of new normals at VERTEXes that
7432 // was computed on non-degenerated _CentralCurveOnEdge's
7433 gp_XYZ newNorm = ( centerCurves[ iE ]._ledges.front()->_normal +
7434 centerCurves[ iE ]._ledges.back ()->_normal );
7435 double sz = newNorm.Modulus();
7439 double newCosin = ( 0.5 * centerCurves[ iE ]._ledges.front()->_cosin +
7440 0.5 * centerCurves[ iE ]._ledges.back ()->_cosin );
7441 for ( size_t iLE = 1, nb = centerCurves[ iE ]._ledges.size() - 1; iLE < nb; ++iLE )
7443 centerCurves[ iE ]._ledges[ iLE ]->SetNormal( newNorm );
7444 centerCurves[ iE ]._ledges[ iLE ]->_cosin = newCosin;
7445 centerCurves[ iE ]._ledges[ iLE ]->Set( _LayerEdge::NORMAL_UPDATED );
7449 // Find new normals for _LayerEdge's based on FACE
7452 avgCosin /= nbCosin;
7453 const TGeomID faceID = meshDS->ShapeToIndex( convFace._face );
7454 map< TGeomID, _EdgesOnShape* >::iterator id2eos = convFace._subIdToEOS.find( faceID );
7455 if ( id2eos != convFace._subIdToEOS.end() )
7459 _EdgesOnShape& eos = * ( id2eos->second );
7460 for ( size_t i = 0; i < eos._edges.size(); ++i )
7462 _LayerEdge* ledge = eos._edges[ i ];
7463 if ( !convFace.GetCenterOfCurvature( ledge, surfProp, helper, center ))
7465 for ( size_t i = 0; i < centerCurves.size(); ++i, ++iE )
7467 iE = iE % centerCurves.size();
7468 if ( centerCurves[ iE ]._isDegenerated )
7470 newNorm.SetCoord( 0,0,0 );
7471 if ( centerCurves[ iE ].FindNewNormal( center, newNorm ))
7473 ledge->SetNormal( newNorm );
7474 ledge->_cosin = avgCosin;
7475 ledge->Set( _LayerEdge::NORMAL_UPDATED );
7482 } // not a quasi-spherical FACE
7484 // Update _LayerEdge's data according to a new normal
7486 dumpFunction(SMESH_Comment("updateNormalsOfConvexFaces")<<data._index
7487 <<"_F"<<meshDS->ShapeToIndex( convFace._face ));
7489 id2eos = convFace._subIdToEOS.begin();
7490 for ( ; id2eos != convFace._subIdToEOS.end(); ++id2eos )
7492 _EdgesOnShape& eos = * ( id2eos->second );
7493 for ( size_t i = 0; i < eos._edges.size(); ++i )
7495 _LayerEdge* & ledge = eos._edges[ i ];
7496 double len = ledge->_len;
7497 ledge->InvalidateStep( stepNb + 1, eos, /*restoreLength=*/true );
7498 ledge->SetCosin( ledge->_cosin );
7499 ledge->SetNewLength( len, eos, helper );
7501 if ( eos.ShapeType() != TopAbs_FACE )
7502 for ( size_t i = 0; i < eos._edges.size(); ++i )
7504 _LayerEdge* ledge = eos._edges[ i ];
7505 for ( size_t iN = 0; iN < ledge->_neibors.size(); ++iN )
7507 _LayerEdge* neibor = ledge->_neibors[iN];
7508 if ( neibor->_nodes[0]->GetPosition()->GetDim() == 2 )
7510 neibor->Set( _LayerEdge::NEAR_BOUNDARY );
7511 neibor->Set( _LayerEdge::MOVED );
7512 neibor->SetSmooLen( neibor->_len );
7516 } // loop on sub-shapes of convFace._face
7518 // Find FACEs adjacent to convFace._face that got necessity to smooth
7519 // as a result of normals modification
7521 set< _EdgesOnShape* > adjFacesToSmooth;
7522 for ( size_t iE = 0; iE < centerCurves.size(); ++iE )
7524 if ( centerCurves[ iE ]._adjFace.IsNull() ||
7525 centerCurves[ iE ]._adjFaceToSmooth )
7527 for ( size_t iLE = 0; iLE < centerCurves[ iE ]._ledges.size(); ++iLE )
7529 if ( centerCurves[ iE ]._ledges[ iLE ]->_cosin > theMinSmoothCosin )
7531 adjFacesToSmooth.insert( data.GetShapeEdges( centerCurves[ iE ]._adjFace ));
7536 data.AddShapesToSmooth( adjFacesToSmooth );
7541 } // loop on data._convexFaces
7546 //================================================================================
7548 * \brief Return max curvature of a FACE
7550 //================================================================================
7552 double _ConvexFace::GetMaxCurvature( _SolidData& data,
7554 BRepLProp_SLProps& surfProp,
7555 SMESH_MesherHelper& helper)
7557 double maxCurvature = 0;
7559 TopoDS_Face F = TopoDS::Face( eof._shape );
7561 const int nbTestPnt = 5;
7562 const double oriFactor = ( F.Orientation() == TopAbs_REVERSED ? +1. : -1. );
7563 SMESH_subMeshIteratorPtr smIt = eof._subMesh->getDependsOnIterator(/*includeSelf=*/true);
7564 while ( smIt->more() )
7566 SMESH_subMesh* sm = smIt->next();
7567 const TGeomID subID = sm->GetId();
7569 // find _LayerEdge's of a sub-shape
7571 if (( eos = data.GetShapeEdges( subID )))
7572 this->_subIdToEOS.insert( make_pair( subID, eos ));
7576 // check concavity and curvature and limit data._stepSize
7577 const double minCurvature =
7578 1. / ( eos->_hyp.GetTotalThickness() * ( 1 + theThickToIntersection ));
7579 size_t iStep = Max( 1, eos->_edges.size() / nbTestPnt );
7580 for ( size_t i = 0; i < eos->_edges.size(); i += iStep )
7582 gp_XY uv = helper.GetNodeUV( F, eos->_edges[ i ]->_nodes[0] );
7583 surfProp.SetParameters( uv.X(), uv.Y() );
7584 if ( surfProp.IsCurvatureDefined() )
7586 double curvature = Max( surfProp.MaxCurvature() * oriFactor,
7587 surfProp.MinCurvature() * oriFactor );
7588 maxCurvature = Max( maxCurvature, curvature );
7590 if ( curvature > minCurvature )
7591 this->_isTooCurved = true;
7594 } // loop on sub-shapes of the FACE
7596 return maxCurvature;
7599 //================================================================================
7601 * \brief Finds a center of curvature of a surface at a _LayerEdge
7603 //================================================================================
7605 bool _ConvexFace::GetCenterOfCurvature( _LayerEdge* ledge,
7606 BRepLProp_SLProps& surfProp,
7607 SMESH_MesherHelper& helper,
7608 gp_Pnt & center ) const
7610 gp_XY uv = helper.GetNodeUV( _face, ledge->_nodes[0] );
7611 surfProp.SetParameters( uv.X(), uv.Y() );
7612 if ( !surfProp.IsCurvatureDefined() )
7615 const double oriFactor = ( _face.Orientation() == TopAbs_REVERSED ? +1. : -1. );
7616 double surfCurvatureMax = surfProp.MaxCurvature() * oriFactor;
7617 double surfCurvatureMin = surfProp.MinCurvature() * oriFactor;
7618 if ( surfCurvatureMin > surfCurvatureMax )
7619 center = surfProp.Value().Translated( surfProp.Normal().XYZ() / surfCurvatureMin * oriFactor );
7621 center = surfProp.Value().Translated( surfProp.Normal().XYZ() / surfCurvatureMax * oriFactor );
7626 //================================================================================
7628 * \brief Check that prisms are not distorted
7630 //================================================================================
7632 bool _ConvexFace::CheckPrisms() const
7635 for ( size_t i = 0; i < _simplexTestEdges.size(); ++i )
7637 const _LayerEdge* edge = _simplexTestEdges[i];
7638 SMESH_TNodeXYZ tgtXYZ( edge->_nodes.back() );
7639 for ( size_t j = 0; j < edge->_simplices.size(); ++j )
7640 if ( !edge->_simplices[j].IsForward( edge->_nodes[0], tgtXYZ, vol ))
7642 debugMsg( "Bad simplex of _simplexTestEdges ("
7643 << " "<< edge->_nodes[0]->GetID()<< " "<< tgtXYZ._node->GetID()
7644 << " "<< edge->_simplices[j]._nPrev->GetID()
7645 << " "<< edge->_simplices[j]._nNext->GetID() << " )" );
7652 //================================================================================
7654 * \brief Try to compute a new normal by interpolating normals of _LayerEdge's
7655 * stored in this _CentralCurveOnEdge.
7656 * \param [in] center - curvature center of a point of another _CentralCurveOnEdge.
7657 * \param [in,out] newNormal - current normal at this point, to be redefined
7658 * \return bool - true if succeeded.
7660 //================================================================================
7662 bool _CentralCurveOnEdge::FindNewNormal( const gp_Pnt& center, gp_XYZ& newNormal )
7664 if ( this->_isDegenerated )
7667 // find two centers the given one lies between
7669 for ( size_t i = 0, nb = _curvaCenters.size()-1; i < nb; ++i )
7671 double sl2 = 1.001 * _segLength2[ i ];
7673 double d1 = center.SquareDistance( _curvaCenters[ i ]);
7677 double d2 = center.SquareDistance( _curvaCenters[ i+1 ]);
7678 if ( d2 > sl2 || d2 + d1 < 1e-100 )
7683 double r = d1 / ( d1 + d2 );
7684 gp_XYZ norm = (( 1. - r ) * _ledges[ i ]->_normal +
7685 ( r ) * _ledges[ i+1 ]->_normal );
7689 double sz = newNormal.Modulus();
7698 //================================================================================
7700 * \brief Set shape members
7702 //================================================================================
7704 void _CentralCurveOnEdge::SetShapes( const TopoDS_Edge& edge,
7705 const _ConvexFace& convFace,
7707 SMESH_MesherHelper& helper)
7711 PShapeIteratorPtr fIt = helper.GetAncestors( edge, *helper.GetMesh(), TopAbs_FACE );
7712 while ( const TopoDS_Shape* F = fIt->next())
7713 if ( !convFace._face.IsSame( *F ))
7715 _adjFace = TopoDS::Face( *F );
7716 _adjFaceToSmooth = false;
7717 // _adjFace already in a smoothing queue ?
7718 if ( _EdgesOnShape* eos = data.GetShapeEdges( _adjFace ))
7719 _adjFaceToSmooth = eos->_toSmooth;
7724 //================================================================================
7726 * \brief Looks for intersection of it's last segment with faces
7727 * \param distance - returns shortest distance from the last node to intersection
7729 //================================================================================
7731 bool _LayerEdge::FindIntersection( SMESH_ElementSearcher& searcher,
7733 const double& epsilon,
7735 const SMDS_MeshElement** intFace)
7737 vector< const SMDS_MeshElement* > suspectFaces;
7739 gp_Ax1 lastSegment = LastSegment( segLen, eos );
7740 searcher.GetElementsNearLine( lastSegment, SMDSAbs_Face, suspectFaces );
7742 bool segmentIntersected = false;
7743 distance = Precision::Infinite();
7744 int iFace = -1; // intersected face
7745 for ( size_t j = 0 ; j < suspectFaces.size() /*&& !segmentIntersected*/; ++j )
7747 const SMDS_MeshElement* face = suspectFaces[j];
7748 if ( face->GetNodeIndex( _nodes.back() ) >= 0 ||
7749 face->GetNodeIndex( _nodes[0] ) >= 0 )
7750 continue; // face sharing _LayerEdge node
7751 const int nbNodes = face->NbCornerNodes();
7752 bool intFound = false;
7754 SMDS_MeshElement::iterator nIt = face->begin_nodes();
7757 intFound = SegTriaInter( lastSegment, *nIt++, *nIt++, *nIt++, dist, epsilon );
7761 const SMDS_MeshNode* tria[3];
7764 for ( int n2 = 2; n2 < nbNodes && !intFound; ++n2 )
7767 intFound = SegTriaInter(lastSegment, tria[0], tria[1], tria[2], dist, epsilon );
7773 if ( dist < segLen*(1.01) && dist > -(_len*_lenFactor-segLen) )
7774 segmentIntersected = true;
7775 if ( distance > dist )
7776 distance = dist, iFace = j;
7779 if ( intFace ) *intFace = ( iFace != -1 ) ? suspectFaces[iFace] : 0;
7783 if ( segmentIntersected )
7786 SMDS_MeshElement::iterator nIt = suspectFaces[iFace]->begin_nodes();
7787 gp_XYZ intP( lastSegment.Location().XYZ() + lastSegment.Direction().XYZ() * ( distance+segLen ));
7788 cout << "nodes: tgt " << _nodes.back()->GetID() << " src " << _nodes[0]->GetID()
7789 << ", intersection with face ("
7790 << (*nIt++)->GetID()<<" "<< (*nIt++)->GetID()<<" "<< (*nIt++)->GetID()
7791 << ") at point (" << intP.X() << ", " << intP.Y() << ", " << intP.Z()
7792 << ") distance = " << distance << endl;
7796 return segmentIntersected;
7799 //================================================================================
7801 * \brief Returns a point used to check orientation of _simplices
7803 //================================================================================
7805 gp_XYZ _LayerEdge::PrevCheckPos( _EdgesOnShape* eos ) const
7807 size_t i = Is( NORMAL_UPDATED ) ? _pos.size()-2 : 0;
7809 if ( !eos || eos->_sWOL.IsNull() )
7812 if ( eos->SWOLType() == TopAbs_EDGE )
7814 return BRepAdaptor_Curve( TopoDS::Edge( eos->_sWOL )).Value( _pos[i].X() ).XYZ();
7816 //else // TopAbs_FACE
7818 return BRepAdaptor_Surface( TopoDS::Face( eos->_sWOL )).Value(_pos[i].X(), _pos[i].Y() ).XYZ();
7821 //================================================================================
7823 * \brief Returns size and direction of the last segment
7825 //================================================================================
7827 gp_Ax1 _LayerEdge::LastSegment(double& segLen, _EdgesOnShape& eos) const
7829 // find two non-coincident positions
7830 gp_XYZ orig = _pos.back();
7832 int iPrev = _pos.size() - 2;
7833 //const double tol = ( _len > 0 ) ? 0.3*_len : 1e-100; // adjusted for IPAL52478 + PAL22576
7834 const double tol = ( _len > 0 ) ? ( 1e-6 * _len ) : 1e-100;
7835 while ( iPrev >= 0 )
7837 vec = orig - _pos[iPrev];
7838 if ( vec.SquareModulus() > tol*tol )
7848 segDir.SetLocation( SMESH_TNodeXYZ( _nodes[0] ));
7849 segDir.SetDirection( _normal );
7854 gp_Pnt pPrev = _pos[ iPrev ];
7855 if ( !eos._sWOL.IsNull() )
7857 TopLoc_Location loc;
7858 if ( eos.SWOLType() == TopAbs_EDGE )
7861 Handle(Geom_Curve) curve = BRep_Tool::Curve( TopoDS::Edge( eos._sWOL ), loc, f,l);
7862 pPrev = curve->Value( pPrev.X() ).Transformed( loc );
7866 Handle(Geom_Surface) surface = BRep_Tool::Surface( TopoDS::Face( eos._sWOL ), loc );
7867 pPrev = surface->Value( pPrev.X(), pPrev.Y() ).Transformed( loc );
7869 vec = SMESH_TNodeXYZ( _nodes.back() ) - pPrev.XYZ();
7871 segDir.SetLocation( pPrev );
7872 segDir.SetDirection( vec );
7873 segLen = vec.Modulus();
7879 //================================================================================
7881 * \brief Return the last (or \a which) position of the target node on a FACE.
7882 * \param [in] F - the FACE this _LayerEdge is inflated along
7883 * \param [in] which - index of position
7884 * \return gp_XY - result UV
7886 //================================================================================
7888 gp_XY _LayerEdge::LastUV( const TopoDS_Face& F, _EdgesOnShape& eos, int which ) const
7890 if ( F.IsSame( eos._sWOL )) // F is my FACE
7891 return gp_XY( _pos.back().X(), _pos.back().Y() );
7893 if ( eos.SWOLType() != TopAbs_EDGE ) // wrong call
7894 return gp_XY( 1e100, 1e100 );
7896 // _sWOL is EDGE of F; _pos.back().X() is the last U on the EDGE
7897 double f, l, u = _pos[ which < 0 ? _pos.size()-1 : which ].X();
7898 Handle(Geom2d_Curve) C2d = BRep_Tool::CurveOnSurface( TopoDS::Edge(eos._sWOL), F, f,l);
7899 if ( !C2d.IsNull() && f <= u && u <= l )
7900 return C2d->Value( u ).XY();
7902 return gp_XY( 1e100, 1e100 );
7905 //================================================================================
7907 * \brief Test intersection of the last segment with a given triangle
7908 * using Moller-Trumbore algorithm
7909 * Intersection is detected if distance to intersection is less than _LayerEdge._len
7911 //================================================================================
7913 bool _LayerEdge::SegTriaInter( const gp_Ax1& lastSegment,
7914 const gp_XYZ& vert0,
7915 const gp_XYZ& vert1,
7916 const gp_XYZ& vert2,
7918 const double& EPSILON) const
7920 const gp_Pnt& orig = lastSegment.Location();
7921 const gp_Dir& dir = lastSegment.Direction();
7923 /* calculate distance from vert0 to ray origin */
7924 //gp_XYZ tvec = orig.XYZ() - vert0;
7926 //if ( tvec * dir > EPSILON )
7927 // intersected face is at back side of the temporary face this _LayerEdge belongs to
7930 gp_XYZ edge1 = vert1 - vert0;
7931 gp_XYZ edge2 = vert2 - vert0;
7933 /* begin calculating determinant - also used to calculate U parameter */
7934 gp_XYZ pvec = dir.XYZ() ^ edge2;
7936 /* if determinant is near zero, ray lies in plane of triangle */
7937 double det = edge1 * pvec;
7939 const double ANGL_EPSILON = 1e-12;
7940 if ( det > -ANGL_EPSILON && det < ANGL_EPSILON )
7943 /* calculate distance from vert0 to ray origin */
7944 gp_XYZ tvec = orig.XYZ() - vert0;
7946 /* calculate U parameter and test bounds */
7947 double u = ( tvec * pvec ) / det;
7948 //if (u < 0.0 || u > 1.0)
7949 if ( u < -EPSILON || u > 1.0 + EPSILON )
7952 /* prepare to test V parameter */
7953 gp_XYZ qvec = tvec ^ edge1;
7955 /* calculate V parameter and test bounds */
7956 double v = (dir.XYZ() * qvec) / det;
7957 //if ( v < 0.0 || u + v > 1.0 )
7958 if ( v < -EPSILON || u + v > 1.0 + EPSILON )
7961 /* calculate t, ray intersects triangle */
7962 t = (edge2 * qvec) / det;
7968 //================================================================================
7970 * \brief _LayerEdge, located at a concave VERTEX of a FACE, moves target nodes of
7971 * neighbor _LayerEdge's by it's own inflation vector.
7972 * \param [in] eov - EOS of the VERTEX
7973 * \param [in] eos - EOS of the FACE
7974 * \param [in] step - inflation step
7975 * \param [in,out] badSmooEdges - tangled _LayerEdge's
7977 //================================================================================
7979 void _LayerEdge::MoveNearConcaVer( const _EdgesOnShape* eov,
7980 const _EdgesOnShape* eos,
7982 vector< _LayerEdge* > & badSmooEdges )
7984 // check if any of _neibors is in badSmooEdges
7985 if ( std::find_first_of( _neibors.begin(), _neibors.end(),
7986 badSmooEdges.begin(), badSmooEdges.end() ) == _neibors.end() )
7989 // get all edges to move
7991 set< _LayerEdge* > edges;
7993 // find a distance between _LayerEdge on VERTEX and its neighbors
7994 gp_XYZ curPosV = SMESH_TNodeXYZ( _nodes.back() );
7996 for ( size_t i = 0; i < _neibors.size(); ++i )
7998 _LayerEdge* nEdge = _neibors[i];
7999 if ( nEdge->_nodes[0]->getshapeId() == eos->_shapeID )
8001 edges.insert( nEdge );
8002 dist2 = Max( dist2, ( curPosV - nEdge->_pos.back() ).SquareModulus() );
8005 // add _LayerEdge's close to curPosV
8009 for ( set< _LayerEdge* >::iterator e = edges.begin(); e != edges.end(); ++e )
8011 _LayerEdge* edgeF = *e;
8012 for ( size_t i = 0; i < edgeF->_neibors.size(); ++i )
8014 _LayerEdge* nEdge = edgeF->_neibors[i];
8015 if ( nEdge->_nodes[0]->getshapeId() == eos->_shapeID &&
8016 dist2 > ( curPosV - nEdge->_pos.back() ).SquareModulus() )
8017 edges.insert( nEdge );
8021 while ( nbE < edges.size() );
8023 // move the target node of the got edges
8025 gp_XYZ prevPosV = PrevPos();
8026 if ( eov->SWOLType() == TopAbs_EDGE )
8028 BRepAdaptor_Curve curve ( TopoDS::Edge( eov->_sWOL ));
8029 prevPosV = curve.Value( prevPosV.X() ).XYZ();
8031 else if ( eov->SWOLType() == TopAbs_FACE )
8033 BRepAdaptor_Surface surface( TopoDS::Face( eov->_sWOL ));
8034 prevPosV = surface.Value( prevPosV.X(), prevPosV.Y() ).XYZ();
8037 SMDS_FacePosition* fPos;
8038 //double r = 1. - Min( 0.9, step / 10. );
8039 for ( set< _LayerEdge* >::iterator e = edges.begin(); e != edges.end(); ++e )
8041 _LayerEdge* edgeF = *e;
8042 const gp_XYZ prevVF = edgeF->PrevPos() - prevPosV;
8043 const gp_XYZ newPosF = curPosV + prevVF;
8044 SMDS_MeshNode* tgtNodeF = const_cast<SMDS_MeshNode*>( edgeF->_nodes.back() );
8045 tgtNodeF->setXYZ( newPosF.X(), newPosF.Y(), newPosF.Z() );
8046 edgeF->_pos.back() = newPosF;
8047 dumpMoveComm( tgtNodeF, "MoveNearConcaVer" ); // debug
8049 // set _curvature to make edgeF updated by putOnOffsetSurface()
8050 if ( !edgeF->_curvature )
8051 if (( fPos = dynamic_cast<SMDS_FacePosition*>( edgeF->_nodes[0]->GetPosition() )))
8053 edgeF->_curvature = new _Curvature;
8054 edgeF->_curvature->_r = 0;
8055 edgeF->_curvature->_k = 0;
8056 edgeF->_curvature->_h2lenRatio = 0;
8057 edgeF->_curvature->_uv.SetCoord( fPos->GetUParameter(), fPos->GetVParameter() );
8060 // gp_XYZ inflationVec( SMESH_TNodeXYZ( _nodes.back() ) -
8061 // SMESH_TNodeXYZ( _nodes[0] ));
8062 // for ( set< _LayerEdge* >::iterator e = edges.begin(); e != edges.end(); ++e )
8064 // _LayerEdge* edgeF = *e;
8065 // gp_XYZ newPos = SMESH_TNodeXYZ( edgeF->_nodes[0] ) + inflationVec;
8066 // SMDS_MeshNode* tgtNode = const_cast<SMDS_MeshNode*>( edgeF->_nodes.back() );
8067 // tgtNode->setXYZ( newPos.X(), newPos.Y(), newPos.Z() );
8068 // edgeF->_pos.back() = newPosF;
8069 // dumpMoveComm( tgtNode, "MoveNearConcaVer" ); // debug
8072 // smooth _LayerEdge's around moved nodes
8073 //size_t nbBadBefore = badSmooEdges.size();
8074 for ( set< _LayerEdge* >::iterator e = edges.begin(); e != edges.end(); ++e )
8076 _LayerEdge* edgeF = *e;
8077 for ( size_t j = 0; j < edgeF->_neibors.size(); ++j )
8078 if ( edgeF->_neibors[j]->_nodes[0]->getshapeId() == eos->_shapeID )
8079 //&& !edges.count( edgeF->_neibors[j] ))
8081 _LayerEdge* edgeFN = edgeF->_neibors[j];
8082 edgeFN->Unset( SMOOTHED );
8083 int nbBad = edgeFN->Smooth( step, /*isConcaFace=*/true, /*findBest=*/true );
8086 // gp_XYZ newPos = SMESH_TNodeXYZ( edgeFN->_nodes[0] ) + inflationVec;
8087 // const gp_XYZ& prevPos = edgeFN->_pos[ edgeFN->_pos.size()-2 ];
8088 // int nbBadAfter = edgeFN->_simplices.size();
8090 // for ( size_t iS = 0; iS < edgeFN->_simplices.size(); ++iS )
8092 // nbBadAfter -= edgeFN->_simplices[iS].IsForward( &prevPos, &newPos, vol );
8094 // if ( nbBadAfter <= nbBad )
8096 // SMDS_MeshNode* tgtNode = const_cast<SMDS_MeshNode*>( edgeFN->_nodes.back() );
8097 // tgtNode->setXYZ( newPos.X(), newPos.Y(), newPos.Z() );
8098 // edgeF->_pos.back() = newPosF;
8099 // dumpMoveComm( tgtNode, "MoveNearConcaVer 2" ); // debug
8100 // nbBad = nbBadAfter;
8104 badSmooEdges.push_back( edgeFN );
8107 // move a bit not smoothed around moved nodes
8108 // for ( size_t i = nbBadBefore; i < badSmooEdges.size(); ++i )
8110 // _LayerEdge* edgeF = badSmooEdges[i];
8111 // SMDS_MeshNode* tgtNode = const_cast<SMDS_MeshNode*>( edgeF->_nodes.back() );
8112 // gp_XYZ newPos1 = SMESH_TNodeXYZ( edgeF->_nodes[0] ) + inflationVec;
8113 // gp_XYZ newPos2 = 0.5 * ( newPos1 + SMESH_TNodeXYZ( tgtNode ));
8114 // tgtNode->setXYZ( newPos2.X(), newPos2.Y(), newPos2.Z() );
8115 // edgeF->_pos.back() = newPosF;
8116 // dumpMoveComm( tgtNode, "MoveNearConcaVer 2" ); // debug
8120 //================================================================================
8122 * \brief Perform smooth of _LayerEdge's based on EDGE's
8123 * \retval bool - true if node has been moved
8125 //================================================================================
8127 bool _LayerEdge::SmoothOnEdge(Handle(ShapeAnalysis_Surface)& surface,
8128 const TopoDS_Face& F,
8129 SMESH_MesherHelper& helper)
8131 ASSERT( IsOnEdge() );
8133 SMDS_MeshNode* tgtNode = const_cast<SMDS_MeshNode*>( _nodes.back() );
8134 SMESH_TNodeXYZ oldPos( tgtNode );
8135 double dist01, distNewOld;
8137 SMESH_TNodeXYZ p0( _2neibors->tgtNode(0));
8138 SMESH_TNodeXYZ p1( _2neibors->tgtNode(1));
8139 dist01 = p0.Distance( _2neibors->tgtNode(1) );
8141 gp_Pnt newPos = p0 * _2neibors->_wgt[0] + p1 * _2neibors->_wgt[1];
8142 double lenDelta = 0;
8145 //lenDelta = _curvature->lenDelta( _len );
8146 lenDelta = _curvature->lenDeltaByDist( dist01 );
8147 newPos.ChangeCoord() += _normal * lenDelta;
8150 distNewOld = newPos.Distance( oldPos );
8154 if ( _2neibors->_plnNorm )
8156 // put newPos on the plane defined by source node and _plnNorm
8157 gp_XYZ new2src = SMESH_TNodeXYZ( _nodes[0] ) - newPos.XYZ();
8158 double new2srcProj = (*_2neibors->_plnNorm) * new2src;
8159 newPos.ChangeCoord() += (*_2neibors->_plnNorm) * new2srcProj;
8161 tgtNode->setXYZ( newPos.X(), newPos.Y(), newPos.Z() );
8162 _pos.back() = newPos.XYZ();
8166 tgtNode->setXYZ( newPos.X(), newPos.Y(), newPos.Z() );
8167 gp_XY uv( Precision::Infinite(), 0 );
8168 helper.CheckNodeUV( F, tgtNode, uv, 1e-10, /*force=*/true );
8169 _pos.back().SetCoord( uv.X(), uv.Y(), 0 );
8171 newPos = surface->Value( uv );
8172 tgtNode->setXYZ( newPos.X(), newPos.Y(), newPos.Z() );
8175 // commented for IPAL0052478
8176 // if ( _curvature && lenDelta < 0 )
8178 // gp_Pnt prevPos( _pos[ _pos.size()-2 ]);
8179 // _len -= prevPos.Distance( oldPos );
8180 // _len += prevPos.Distance( newPos );
8182 bool moved = distNewOld > dist01/50;
8184 dumpMove( tgtNode ); // debug
8189 //================================================================================
8191 * \brief Perform 3D smooth of nodes inflated from FACE. No check of validity
8193 //================================================================================
8195 void _LayerEdge::SmoothWoCheck()
8197 if ( Is( DIFFICULT ))
8200 bool moved = Is( SMOOTHED );
8201 for ( size_t i = 0; i < _neibors.size() && !moved; ++i )
8202 moved = _neibors[i]->Is( SMOOTHED );
8206 gp_XYZ newPos = (this->*_smooFunction)(); // fun chosen by ChooseSmooFunction()
8208 SMDS_MeshNode* n = const_cast< SMDS_MeshNode* >( _nodes.back() );
8209 n->setXYZ( newPos.X(), newPos.Y(), newPos.Z());
8210 _pos.back() = newPos;
8212 dumpMoveComm( n, SMESH_Comment("No check - ") << _funNames[ smooFunID() ]);
8215 //================================================================================
8217 * \brief Checks validity of _neibors on EDGEs and VERTEXes
8219 //================================================================================
8221 int _LayerEdge::CheckNeiborsOnBoundary( vector< _LayerEdge* >* badNeibors, bool * needSmooth )
8223 if ( ! Is( NEAR_BOUNDARY ))
8228 for ( size_t iN = 0; iN < _neibors.size(); ++iN )
8230 _LayerEdge* eN = _neibors[iN];
8231 if ( eN->_nodes[0]->getshapeId() == _nodes[0]->getshapeId() )
8234 *needSmooth |= ( eN->Is( _LayerEdge::BLOCKED ) ||
8235 eN->Is( _LayerEdge::NORMAL_UPDATED ) ||
8236 eN->_pos.size() != _pos.size() );
8238 SMESH_TNodeXYZ curPosN ( eN->_nodes.back() );
8239 SMESH_TNodeXYZ prevPosN( eN->_nodes[0] );
8240 for ( size_t i = 0; i < eN->_simplices.size(); ++i )
8241 if ( eN->_nodes.size() > 1 &&
8242 eN->_simplices[i].Includes( _nodes.back() ) &&
8243 !eN->_simplices[i].IsForward( &prevPosN, &curPosN, vol ))
8248 badNeibors->push_back( eN );
8249 debugMsg("Bad boundary simplex ( "
8250 << " "<< eN->_nodes[0]->GetID()
8251 << " "<< eN->_nodes.back()->GetID()
8252 << " "<< eN->_simplices[i]._nPrev->GetID()
8253 << " "<< eN->_simplices[i]._nNext->GetID() << " )" );
8264 //================================================================================
8266 * \brief Perform 'smart' 3D smooth of nodes inflated from FACE
8267 * \retval int - nb of bad simplices around this _LayerEdge
8269 //================================================================================
8271 int _LayerEdge::Smooth(const int step, bool findBest, vector< _LayerEdge* >& toSmooth )
8273 if ( !Is( MOVED ) || Is( SMOOTHED ) || Is( BLOCKED ))
8274 return 0; // shape of simplices not changed
8275 if ( _simplices.size() < 2 )
8276 return 0; // _LayerEdge inflated along EDGE or FACE
8278 if ( Is( DIFFICULT )) // || Is( ON_CONCAVE_FACE )
8281 const gp_XYZ& curPos = _pos.back();
8282 const gp_XYZ& prevPos = _pos[0]; //PrevPos();
8284 // quality metrics (orientation) of tetras around _tgtNode
8286 double vol, minVolBefore = 1e100;
8287 for ( size_t i = 0; i < _simplices.size(); ++i )
8289 nbOkBefore += _simplices[i].IsForward( &prevPos, &curPos, vol );
8290 minVolBefore = Min( minVolBefore, vol );
8292 int nbBad = _simplices.size() - nbOkBefore;
8294 bool bndNeedSmooth = false;
8296 nbBad = CheckNeiborsOnBoundary( 0, & bndNeedSmooth );
8300 // evaluate min angle
8301 if ( nbBad == 0 && !findBest && !bndNeedSmooth )
8303 size_t nbGoodAngles = _simplices.size();
8305 for ( size_t i = 0; i < _simplices.size(); ++i )
8307 if ( !_simplices[i].IsMinAngleOK( curPos, angle ) && angle > _minAngle )
8310 if ( nbGoodAngles == _simplices.size() )
8316 if ( Is( ON_CONCAVE_FACE ))
8319 if ( step % 2 == 0 )
8322 if ( Is( ON_CONCAVE_FACE ) && !findBest ) // alternate FUN_CENTROIDAL and FUN_LAPLACIAN
8324 if ( _smooFunction == _funs[ FUN_LAPLACIAN ] )
8325 _smooFunction = _funs[ FUN_CENTROIDAL ];
8327 _smooFunction = _funs[ FUN_LAPLACIAN ];
8330 // compute new position for the last _pos using different _funs
8333 for ( int iFun = -1; iFun < theNbSmooFuns; ++iFun )
8336 newPos = (this->*_smooFunction)(); // fun chosen by ChooseSmooFunction()
8337 else if ( _funs[ iFun ] == _smooFunction )
8338 continue; // _smooFunction again
8339 else if ( step > 1 )
8340 newPos = (this->*_funs[ iFun ])(); // try other smoothing fun
8342 break; // let "easy" functions improve elements around distorted ones
8346 double delta = _curvature->lenDelta( _len );
8348 newPos += _normal * delta;
8351 double segLen = _normal * ( newPos - prevPos );
8352 if ( segLen + delta > 0 )
8353 newPos += _normal * delta;
8355 // double segLenChange = _normal * ( curPos - newPos );
8356 // newPos += 0.5 * _normal * segLenChange;
8360 double minVolAfter = 1e100;
8361 for ( size_t i = 0; i < _simplices.size(); ++i )
8363 nbOkAfter += _simplices[i].IsForward( &prevPos, &newPos, vol );
8364 minVolAfter = Min( minVolAfter, vol );
8367 if ( nbOkAfter < nbOkBefore )
8371 ( nbOkAfter == nbOkBefore ) &&
8372 ( minVolAfter <= minVolBefore ))
8375 nbBad = _simplices.size() - nbOkAfter;
8376 minVolBefore = minVolAfter;
8377 nbOkBefore = nbOkAfter;
8380 SMDS_MeshNode* n = const_cast< SMDS_MeshNode* >( _nodes.back() );
8381 n->setXYZ( newPos.X(), newPos.Y(), newPos.Z());
8382 _pos.back() = newPos;
8384 dumpMoveComm( n, SMESH_Comment( _funNames[ iFun < 0 ? smooFunID() : iFun ] )
8385 << (nbBad ? " --BAD" : ""));
8389 continue; // look for a better function
8395 } // loop on smoothing functions
8397 if ( moved ) // notify _neibors
8400 for ( size_t i = 0; i < _neibors.size(); ++i )
8401 if ( !_neibors[i]->Is( MOVED ))
8403 _neibors[i]->Set( MOVED );
8404 toSmooth.push_back( _neibors[i] );
8411 //================================================================================
8413 * \brief Perform 'smart' 3D smooth of nodes inflated from FACE
8414 * \retval int - nb of bad simplices around this _LayerEdge
8416 //================================================================================
8418 int _LayerEdge::Smooth(const int step, const bool isConcaveFace, bool findBest )
8420 if ( !_smooFunction )
8421 return 0; // _LayerEdge inflated along EDGE or FACE
8423 return 0; // not inflated
8425 const gp_XYZ& curPos = _pos.back();
8426 const gp_XYZ& prevPos = _pos[0]; //PrevCheckPos();
8428 // quality metrics (orientation) of tetras around _tgtNode
8430 double vol, minVolBefore = 1e100;
8431 for ( size_t i = 0; i < _simplices.size(); ++i )
8433 nbOkBefore += _simplices[i].IsForward( &prevPos, &curPos, vol );
8434 minVolBefore = Min( minVolBefore, vol );
8436 int nbBad = _simplices.size() - nbOkBefore;
8438 if ( isConcaveFace ) // alternate FUN_CENTROIDAL and FUN_LAPLACIAN
8440 if ( _smooFunction == _funs[ FUN_CENTROIDAL ] && step % 2 )
8441 _smooFunction = _funs[ FUN_LAPLACIAN ];
8442 else if ( _smooFunction == _funs[ FUN_LAPLACIAN ] && !( step % 2 ))
8443 _smooFunction = _funs[ FUN_CENTROIDAL ];
8446 // compute new position for the last _pos using different _funs
8448 for ( int iFun = -1; iFun < theNbSmooFuns; ++iFun )
8451 newPos = (this->*_smooFunction)(); // fun chosen by ChooseSmooFunction()
8452 else if ( _funs[ iFun ] == _smooFunction )
8453 continue; // _smooFunction again
8454 else if ( step > 1 )
8455 newPos = (this->*_funs[ iFun ])(); // try other smoothing fun
8457 break; // let "easy" functions improve elements around distorted ones
8461 double delta = _curvature->lenDelta( _len );
8463 newPos += _normal * delta;
8466 double segLen = _normal * ( newPos - prevPos );
8467 if ( segLen + delta > 0 )
8468 newPos += _normal * delta;
8470 // double segLenChange = _normal * ( curPos - newPos );
8471 // newPos += 0.5 * _normal * segLenChange;
8475 double minVolAfter = 1e100;
8476 for ( size_t i = 0; i < _simplices.size(); ++i )
8478 nbOkAfter += _simplices[i].IsForward( &prevPos, &newPos, vol );
8479 minVolAfter = Min( minVolAfter, vol );
8482 if ( nbOkAfter < nbOkBefore )
8484 if (( isConcaveFace || findBest ) &&
8485 ( nbOkAfter == nbOkBefore ) &&
8486 ( minVolAfter <= minVolBefore )
8490 nbBad = _simplices.size() - nbOkAfter;
8491 minVolBefore = minVolAfter;
8492 nbOkBefore = nbOkAfter;
8494 SMDS_MeshNode* n = const_cast< SMDS_MeshNode* >( _nodes.back() );
8495 n->setXYZ( newPos.X(), newPos.Y(), newPos.Z());
8496 _pos.back() = newPos;
8498 dumpMoveComm( n, SMESH_Comment( _funNames[ iFun < 0 ? smooFunID() : iFun ] )
8499 << ( nbBad ? "--BAD" : ""));
8501 // commented for IPAL0052478
8502 // _len -= prevPos.Distance(SMESH_TNodeXYZ( n ));
8503 // _len += prevPos.Distance(newPos);
8505 if ( iFun > -1 ) // findBest || the chosen _fun makes worse
8507 //_smooFunction = _funs[ iFun ];
8508 // cout << "# " << _funNames[ iFun ] << "\t N:" << _nodes.back()->GetID()
8509 // << "\t nbBad: " << _simplices.size() - nbOkAfter
8510 // << " minVol: " << minVolAfter
8511 // << " " << newPos.X() << " " << newPos.Y() << " " << newPos.Z()
8513 continue; // look for a better function
8519 } // loop on smoothing functions
8524 //================================================================================
8526 * \brief Chooses a smoothing technic giving a position most close to an initial one.
8527 * For a correct result, _simplices must contain nodes lying on geometry.
8529 //================================================================================
8531 void _LayerEdge::ChooseSmooFunction( const set< TGeomID >& concaveVertices,
8532 const TNode2Edge& n2eMap)
8534 if ( _smooFunction ) return;
8536 // use smoothNefPolygon() near concaveVertices
8537 if ( !concaveVertices.empty() )
8539 _smooFunction = _funs[ FUN_CENTROIDAL ];
8541 Set( ON_CONCAVE_FACE );
8543 for ( size_t i = 0; i < _simplices.size(); ++i )
8545 if ( concaveVertices.count( _simplices[i]._nPrev->getshapeId() ))
8547 _smooFunction = _funs[ FUN_NEFPOLY ];
8549 // set FUN_CENTROIDAL to neighbor edges
8550 for ( i = 0; i < _neibors.size(); ++i )
8552 if ( _neibors[i]->_nodes[0]->GetPosition()->GetDim() == 2 )
8554 _neibors[i]->_smooFunction = _funs[ FUN_CENTROIDAL ];
8561 // // this coice is done only if ( !concaveVertices.empty() ) for Grids/smesh/bugs_19/X1
8562 // // where the nodes are smoothed too far along a sphere thus creating
8563 // // inverted _simplices
8564 // double dist[theNbSmooFuns];
8565 // //double coef[theNbSmooFuns] = { 1., 1.2, 1.4, 1.4 };
8566 // double coef[theNbSmooFuns] = { 1., 1., 1., 1. };
8568 // double minDist = Precision::Infinite();
8569 // gp_Pnt p = SMESH_TNodeXYZ( _nodes[0] );
8570 // for ( int i = 0; i < FUN_NEFPOLY; ++i )
8572 // gp_Pnt newP = (this->*_funs[i])();
8573 // dist[i] = p.SquareDistance( newP );
8574 // if ( dist[i]*coef[i] < minDist )
8576 // _smooFunction = _funs[i];
8577 // minDist = dist[i]*coef[i];
8583 _smooFunction = _funs[ FUN_LAPLACIAN ];
8586 // for ( size_t i = 0; i < _simplices.size(); ++i )
8587 // minDim = Min( minDim, _simplices[i]._nPrev->GetPosition()->GetDim() );
8588 // if ( minDim == 0 )
8589 // _smooFunction = _funs[ FUN_CENTROIDAL ];
8590 // else if ( minDim == 1 )
8591 // _smooFunction = _funs[ FUN_CENTROIDAL ];
8595 // for ( int i = 0; i < FUN_NB; ++i )
8597 // //cout << dist[i] << " ";
8598 // if ( _smooFunction == _funs[i] ) {
8600 // //debugMsg( fNames[i] );
8604 // cout << _funNames[ iMin ] << "\t N:" << _nodes.back()->GetID() << endl;
8607 //================================================================================
8609 * \brief Returns a name of _SmooFunction
8611 //================================================================================
8613 int _LayerEdge::smooFunID( _LayerEdge::PSmooFun fun) const
8616 fun = _smooFunction;
8617 for ( int i = 0; i < theNbSmooFuns; ++i )
8618 if ( fun == _funs[i] )
8621 return theNbSmooFuns;
8624 //================================================================================
8626 * \brief Computes a new node position using Laplacian smoothing
8628 //================================================================================
8630 gp_XYZ _LayerEdge::smoothLaplacian()
8632 gp_XYZ newPos (0,0,0);
8633 for ( size_t i = 0; i < _simplices.size(); ++i )
8634 newPos += SMESH_TNodeXYZ( _simplices[i]._nPrev );
8635 newPos /= _simplices.size();
8640 //================================================================================
8642 * \brief Computes a new node position using angular-based smoothing
8644 //================================================================================
8646 gp_XYZ _LayerEdge::smoothAngular()
8648 vector< gp_Vec > edgeDir; edgeDir. reserve( _simplices.size() + 1 );
8649 vector< double > edgeSize; edgeSize.reserve( _simplices.size() );
8650 vector< gp_XYZ > points; points. reserve( _simplices.size() + 1 );
8652 gp_XYZ pPrev = SMESH_TNodeXYZ( _simplices.back()._nPrev );
8654 for ( size_t i = 0; i < _simplices.size(); ++i )
8656 gp_XYZ p = SMESH_TNodeXYZ( _simplices[i]._nPrev );
8657 edgeDir.push_back( p - pPrev );
8658 edgeSize.push_back( edgeDir.back().Magnitude() );
8659 if ( edgeSize.back() < numeric_limits<double>::min() )
8662 edgeSize.pop_back();
8666 edgeDir.back() /= edgeSize.back();
8667 points.push_back( p );
8672 edgeDir.push_back ( edgeDir[0] );
8673 edgeSize.push_back( edgeSize[0] );
8674 pN /= points.size();
8676 gp_XYZ newPos(0,0,0);
8678 for ( size_t i = 0; i < points.size(); ++i )
8680 gp_Vec toN = pN - points[i];
8681 double toNLen = toN.Magnitude();
8682 if ( toNLen < numeric_limits<double>::min() )
8687 gp_Vec bisec = edgeDir[i] + edgeDir[i+1];
8688 double bisecLen = bisec.SquareMagnitude();
8689 if ( bisecLen < numeric_limits<double>::min() )
8691 gp_Vec norm = edgeDir[i] ^ toN;
8692 bisec = norm ^ edgeDir[i];
8693 bisecLen = bisec.SquareMagnitude();
8695 bisecLen = Sqrt( bisecLen );
8699 gp_XYZ pNew = ( points[i] + bisec.XYZ() * toNLen ) * bisecLen;
8700 sumSize += bisecLen;
8702 gp_XYZ pNew = ( points[i] + bisec.XYZ() * toNLen ) * ( edgeSize[i] + edgeSize[i+1] );
8703 sumSize += ( edgeSize[i] + edgeSize[i+1] );
8709 // project newPos to an average plane
8711 gp_XYZ norm(0,0,0); // plane normal
8712 points.push_back( points[0] );
8713 for ( size_t i = 1; i < points.size(); ++i )
8715 gp_XYZ vec1 = points[ i-1 ] - pN;
8716 gp_XYZ vec2 = points[ i ] - pN;
8717 gp_XYZ cross = vec1 ^ vec2;
8720 if ( cross * norm < numeric_limits<double>::min() )
8721 norm += cross.Reversed();
8725 catch (Standard_Failure) { // if |cross| == 0.
8728 gp_XYZ vec = newPos - pN;
8729 double r = ( norm * vec ) / norm.SquareModulus(); // param [0,1] on norm
8730 newPos = newPos - r * norm;
8735 //================================================================================
8737 * \brief Computes a new node position using weigthed node positions
8739 //================================================================================
8741 gp_XYZ _LayerEdge::smoothLengthWeighted()
8743 vector< double > edgeSize; edgeSize.reserve( _simplices.size() + 1);
8744 vector< gp_XYZ > points; points. reserve( _simplices.size() );
8746 gp_XYZ pPrev = SMESH_TNodeXYZ( _simplices.back()._nPrev );
8747 for ( size_t i = 0; i < _simplices.size(); ++i )
8749 gp_XYZ p = SMESH_TNodeXYZ( _simplices[i]._nPrev );
8750 edgeSize.push_back( ( p - pPrev ).Modulus() );
8751 if ( edgeSize.back() < numeric_limits<double>::min() )
8753 edgeSize.pop_back();
8757 points.push_back( p );
8761 edgeSize.push_back( edgeSize[0] );
8763 gp_XYZ newPos(0,0,0);
8765 for ( size_t i = 0; i < points.size(); ++i )
8767 newPos += points[i] * ( edgeSize[i] + edgeSize[i+1] );
8768 sumSize += edgeSize[i] + edgeSize[i+1];
8774 //================================================================================
8776 * \brief Computes a new node position using angular-based smoothing
8778 //================================================================================
8780 gp_XYZ _LayerEdge::smoothCentroidal()
8782 gp_XYZ newPos(0,0,0);
8783 gp_XYZ pN = SMESH_TNodeXYZ( _nodes.back() );
8785 for ( size_t i = 0; i < _simplices.size(); ++i )
8787 gp_XYZ p1 = SMESH_TNodeXYZ( _simplices[i]._nPrev );
8788 gp_XYZ p2 = SMESH_TNodeXYZ( _simplices[i]._nNext );
8789 gp_XYZ gc = ( pN + p1 + p2 ) / 3.;
8790 double size = (( p1 - pN ) ^ ( p2 - pN )).Modulus();
8793 newPos += gc * size;
8800 //================================================================================
8802 * \brief Computes a new node position located inside a Nef polygon
8804 //================================================================================
8806 gp_XYZ _LayerEdge::smoothNefPolygon()
8807 #ifdef OLD_NEF_POLYGON
8809 gp_XYZ newPos(0,0,0);
8811 // get a plane to search a solution on
8813 vector< gp_XYZ > vecs( _simplices.size() + 1 );
8815 const double tol = numeric_limits<double>::min();
8816 gp_XYZ center(0,0,0);
8817 for ( i = 0; i < _simplices.size(); ++i )
8819 vecs[i] = ( SMESH_TNodeXYZ( _simplices[i]._nNext ) -
8820 SMESH_TNodeXYZ( _simplices[i]._nPrev ));
8821 center += SMESH_TNodeXYZ( _simplices[i]._nPrev );
8823 vecs.back() = vecs[0];
8824 center /= _simplices.size();
8826 gp_XYZ zAxis(0,0,0);
8827 for ( i = 0; i < _simplices.size(); ++i )
8828 zAxis += vecs[i] ^ vecs[i+1];
8831 for ( i = 0; i < _simplices.size(); ++i )
8834 if ( yAxis.SquareModulus() > tol )
8837 gp_XYZ xAxis = yAxis ^ zAxis;
8838 // SMESH_TNodeXYZ p0( _simplices[0]._nPrev );
8839 // const double tol = 1e-6 * ( p0.Distance( _simplices[1]._nPrev ) +
8840 // p0.Distance( _simplices[2]._nPrev ));
8841 // gp_XYZ center = smoothLaplacian();
8842 // gp_XYZ xAxis, yAxis, zAxis;
8843 // for ( i = 0; i < _simplices.size(); ++i )
8845 // xAxis = SMESH_TNodeXYZ( _simplices[i]._nPrev ) - center;
8846 // if ( xAxis.SquareModulus() > tol*tol )
8849 // for ( i = 1; i < _simplices.size(); ++i )
8851 // yAxis = SMESH_TNodeXYZ( _simplices[i]._nPrev ) - center;
8852 // zAxis = xAxis ^ yAxis;
8853 // if ( zAxis.SquareModulus() > tol*tol )
8856 // if ( i == _simplices.size() ) return newPos;
8858 yAxis = zAxis ^ xAxis;
8859 xAxis /= xAxis.Modulus();
8860 yAxis /= yAxis.Modulus();
8862 // get half-planes of _simplices
8864 vector< _halfPlane > halfPlns( _simplices.size() );
8866 for ( size_t i = 0; i < _simplices.size(); ++i )
8868 gp_XYZ OP1 = SMESH_TNodeXYZ( _simplices[i]._nPrev ) - center;
8869 gp_XYZ OP2 = SMESH_TNodeXYZ( _simplices[i]._nNext ) - center;
8870 gp_XY p1( OP1 * xAxis, OP1 * yAxis );
8871 gp_XY p2( OP2 * xAxis, OP2 * yAxis );
8872 gp_XY vec12 = p2 - p1;
8873 double dist12 = vec12.Modulus();
8877 halfPlns[ nbHP ]._pos = p1;
8878 halfPlns[ nbHP ]._dir = vec12;
8879 halfPlns[ nbHP ]._inNorm.SetCoord( -vec12.Y(), vec12.X() );
8883 // intersect boundaries of half-planes, define state of intersection points
8884 // in relation to all half-planes and calculate internal point of a 2D polygon
8887 gp_XY newPos2D (0,0);
8889 enum { UNDEF = -1, NOT_OUT, IS_OUT, NO_INT };
8890 typedef std::pair< gp_XY, int > TIntPntState; // coord and isOut state
8891 TIntPntState undefIPS( gp_XY(1e100,1e100), UNDEF );
8893 vector< vector< TIntPntState > > allIntPnts( nbHP );
8894 for ( int iHP1 = 0; iHP1 < nbHP; ++iHP1 )
8896 vector< TIntPntState > & intPnts1 = allIntPnts[ iHP1 ];
8897 if ( intPnts1.empty() ) intPnts1.resize( nbHP, undefIPS );
8899 int iPrev = SMESH_MesherHelper::WrapIndex( iHP1 - 1, nbHP );
8900 int iNext = SMESH_MesherHelper::WrapIndex( iHP1 + 1, nbHP );
8903 const gp_XY* segEnds[2] = { 0, 0 }; // NOT_OUT points
8905 for ( int iHP2 = 0; iHP2 < nbHP; ++iHP2 )
8907 if ( iHP1 == iHP2 ) continue;
8909 TIntPntState & ips1 = intPnts1[ iHP2 ];
8910 if ( ips1.second == UNDEF )
8912 // find an intersection point of boundaries of iHP1 and iHP2
8914 if ( iHP2 == iPrev ) // intersection with neighbors is known
8915 ips1.first = halfPlns[ iHP1 ]._pos;
8916 else if ( iHP2 == iNext )
8917 ips1.first = halfPlns[ iHP2 ]._pos;
8918 else if ( !halfPlns[ iHP1 ].FindIntersection( halfPlns[ iHP2 ], ips1.first ))
8919 ips1.second = NO_INT;
8921 // classify the found intersection point
8922 if ( ips1.second != NO_INT )
8924 ips1.second = NOT_OUT;
8925 for ( int i = 0; i < nbHP && ips1.second == NOT_OUT; ++i )
8926 if ( i != iHP1 && i != iHP2 &&
8927 halfPlns[ i ].IsOut( ips1.first, tol ))
8928 ips1.second = IS_OUT;
8930 vector< TIntPntState > & intPnts2 = allIntPnts[ iHP2 ];
8931 if ( intPnts2.empty() ) intPnts2.resize( nbHP, undefIPS );
8932 TIntPntState & ips2 = intPnts2[ iHP1 ];
8935 if ( ips1.second == NOT_OUT )
8938 segEnds[ bool(segEnds[0]) ] = & ips1.first;
8942 // find a NOT_OUT segment of boundary which is located between
8943 // two NOT_OUT int points
8946 continue; // no such a segment
8950 // sort points along the boundary
8951 map< double, TIntPntState* > ipsByParam;
8952 for ( int iHP2 = 0; iHP2 < nbHP; ++iHP2 )
8954 TIntPntState & ips1 = intPnts1[ iHP2 ];
8955 if ( ips1.second != NO_INT )
8957 gp_XY op = ips1.first - halfPlns[ iHP1 ]._pos;
8958 double param = op * halfPlns[ iHP1 ]._dir;
8959 ipsByParam.insert( make_pair( param, & ips1 ));
8962 // look for two neighboring NOT_OUT points
8964 map< double, TIntPntState* >::iterator u2ips = ipsByParam.begin();
8965 for ( ; u2ips != ipsByParam.end(); ++u2ips )
8967 TIntPntState & ips1 = *(u2ips->second);
8968 if ( ips1.second == NOT_OUT )
8969 segEnds[ bool( nbNotOut++ ) ] = & ips1.first;
8970 else if ( nbNotOut >= 2 )
8977 if ( nbNotOut >= 2 )
8979 double len = ( *segEnds[0] - *segEnds[1] ).Modulus();
8982 newPos2D += 0.5 * len * ( *segEnds[0] + *segEnds[1] );
8989 newPos = center + xAxis * newPos2D.X() + yAxis * newPos2D.Y();
8998 #else // OLD_NEF_POLYGON
8999 { ////////////////////////////////// NEW
9000 gp_XYZ newPos(0,0,0);
9002 // get a plane to search a solution on
9005 gp_XYZ center(0,0,0);
9006 for ( i = 0; i < _simplices.size(); ++i )
9007 center += SMESH_TNodeXYZ( _simplices[i]._nPrev );
9008 center /= _simplices.size();
9010 vector< gp_XYZ > vecs( _simplices.size() + 1 );
9011 for ( i = 0; i < _simplices.size(); ++i )
9012 vecs[i] = SMESH_TNodeXYZ( _simplices[i]._nPrev ) - center;
9013 vecs.back() = vecs[0];
9015 const double tol = numeric_limits<double>::min();
9016 gp_XYZ zAxis(0,0,0);
9017 for ( i = 0; i < _simplices.size(); ++i )
9019 gp_XYZ cross = vecs[i] ^ vecs[i+1];
9022 if ( cross * zAxis < tol )
9023 zAxis += cross.Reversed();
9027 catch (Standard_Failure) { // if |cross| == 0.
9032 for ( i = 0; i < _simplices.size(); ++i )
9035 if ( yAxis.SquareModulus() > tol )
9038 gp_XYZ xAxis = yAxis ^ zAxis;
9039 // SMESH_TNodeXYZ p0( _simplices[0]._nPrev );
9040 // const double tol = 1e-6 * ( p0.Distance( _simplices[1]._nPrev ) +
9041 // p0.Distance( _simplices[2]._nPrev ));
9042 // gp_XYZ center = smoothLaplacian();
9043 // gp_XYZ xAxis, yAxis, zAxis;
9044 // for ( i = 0; i < _simplices.size(); ++i )
9046 // xAxis = SMESH_TNodeXYZ( _simplices[i]._nPrev ) - center;
9047 // if ( xAxis.SquareModulus() > tol*tol )
9050 // for ( i = 1; i < _simplices.size(); ++i )
9052 // yAxis = SMESH_TNodeXYZ( _simplices[i]._nPrev ) - center;
9053 // zAxis = xAxis ^ yAxis;
9054 // if ( zAxis.SquareModulus() > tol*tol )
9057 // if ( i == _simplices.size() ) return newPos;
9059 yAxis = zAxis ^ xAxis;
9060 xAxis /= xAxis.Modulus();
9061 yAxis /= yAxis.Modulus();
9063 // get half-planes of _simplices
9065 vector< _halfPlane > halfPlns( _simplices.size() );
9067 for ( size_t i = 0; i < _simplices.size(); ++i )
9069 const gp_XYZ& OP1 = vecs[ i ];
9070 const gp_XYZ& OP2 = vecs[ i+1 ];
9071 gp_XY p1( OP1 * xAxis, OP1 * yAxis );
9072 gp_XY p2( OP2 * xAxis, OP2 * yAxis );
9073 gp_XY vec12 = p2 - p1;
9074 double dist12 = vec12.Modulus();
9078 halfPlns[ nbHP ]._pos = p1;
9079 halfPlns[ nbHP ]._dir = vec12;
9080 halfPlns[ nbHP ]._inNorm.SetCoord( -vec12.Y(), vec12.X() );
9084 // intersect boundaries of half-planes, define state of intersection points
9085 // in relation to all half-planes and calculate internal point of a 2D polygon
9088 gp_XY newPos2D (0,0);
9090 enum { UNDEF = -1, NOT_OUT, IS_OUT, NO_INT };
9091 typedef std::pair< gp_XY, int > TIntPntState; // coord and isOut state
9092 TIntPntState undefIPS( gp_XY(1e100,1e100), UNDEF );
9094 vector< vector< TIntPntState > > allIntPnts( nbHP );
9095 for ( int iHP1 = 0; iHP1 < nbHP; ++iHP1 )
9097 vector< TIntPntState > & intPnts1 = allIntPnts[ iHP1 ];
9098 if ( intPnts1.empty() ) intPnts1.resize( nbHP, undefIPS );
9100 int iPrev = SMESH_MesherHelper::WrapIndex( iHP1 - 1, nbHP );
9101 int iNext = SMESH_MesherHelper::WrapIndex( iHP1 + 1, nbHP );
9104 const gp_XY* segEnds[2] = { 0, 0 }; // NOT_OUT points
9106 for ( int iHP2 = 0; iHP2 < nbHP; ++iHP2 )
9108 if ( iHP1 == iHP2 ) continue;
9110 TIntPntState & ips1 = intPnts1[ iHP2 ];
9111 if ( ips1.second == UNDEF )
9113 // find an intersection point of boundaries of iHP1 and iHP2
9115 if ( iHP2 == iPrev ) // intersection with neighbors is known
9116 ips1.first = halfPlns[ iHP1 ]._pos;
9117 else if ( iHP2 == iNext )
9118 ips1.first = halfPlns[ iHP2 ]._pos;
9119 else if ( !halfPlns[ iHP1 ].FindIntersection( halfPlns[ iHP2 ], ips1.first ))
9120 ips1.second = NO_INT;
9122 // classify the found intersection point
9123 if ( ips1.second != NO_INT )
9125 ips1.second = NOT_OUT;
9126 for ( int i = 0; i < nbHP && ips1.second == NOT_OUT; ++i )
9127 if ( i != iHP1 && i != iHP2 &&
9128 halfPlns[ i ].IsOut( ips1.first, tol ))
9129 ips1.second = IS_OUT;
9131 vector< TIntPntState > & intPnts2 = allIntPnts[ iHP2 ];
9132 if ( intPnts2.empty() ) intPnts2.resize( nbHP, undefIPS );
9133 TIntPntState & ips2 = intPnts2[ iHP1 ];
9136 if ( ips1.second == NOT_OUT )
9139 segEnds[ bool(segEnds[0]) ] = & ips1.first;
9143 // find a NOT_OUT segment of boundary which is located between
9144 // two NOT_OUT int points
9147 continue; // no such a segment
9151 // sort points along the boundary
9152 map< double, TIntPntState* > ipsByParam;
9153 for ( int iHP2 = 0; iHP2 < nbHP; ++iHP2 )
9155 TIntPntState & ips1 = intPnts1[ iHP2 ];
9156 if ( ips1.second != NO_INT )
9158 gp_XY op = ips1.first - halfPlns[ iHP1 ]._pos;
9159 double param = op * halfPlns[ iHP1 ]._dir;
9160 ipsByParam.insert( make_pair( param, & ips1 ));
9163 // look for two neighboring NOT_OUT points
9165 map< double, TIntPntState* >::iterator u2ips = ipsByParam.begin();
9166 for ( ; u2ips != ipsByParam.end(); ++u2ips )
9168 TIntPntState & ips1 = *(u2ips->second);
9169 if ( ips1.second == NOT_OUT )
9170 segEnds[ bool( nbNotOut++ ) ] = & ips1.first;
9171 else if ( nbNotOut >= 2 )
9178 if ( nbNotOut >= 2 )
9180 double len = ( *segEnds[0] - *segEnds[1] ).Modulus();
9183 newPos2D += 0.5 * len * ( *segEnds[0] + *segEnds[1] );
9190 newPos = center + xAxis * newPos2D.X() + yAxis * newPos2D.Y();
9199 #endif // OLD_NEF_POLYGON
9201 //================================================================================
9203 * \brief Add a new segment to _LayerEdge during inflation
9205 //================================================================================
9207 void _LayerEdge::SetNewLength( double len, _EdgesOnShape& eos, SMESH_MesherHelper& helper )
9212 if ( len > _maxLen )
9215 Block( eos.GetData() );
9217 const double lenDelta = len - _len;
9218 if ( lenDelta < len * 1e-3 )
9220 Block( eos.GetData() );
9224 SMDS_MeshNode* n = const_cast< SMDS_MeshNode*>( _nodes.back() );
9225 gp_XYZ oldXYZ = SMESH_TNodeXYZ( n );
9227 if ( eos._hyp.IsOffsetMethod() )
9231 SMDS_ElemIteratorPtr faceIt = _nodes[0]->GetInverseElementIterator( SMDSAbs_Face );
9232 while ( faceIt->more() )
9234 const SMDS_MeshElement* face = faceIt->next();
9235 if ( !eos.GetNormal( face, faceNorm ))
9238 // translate plane of a face
9239 gp_XYZ baryCenter = oldXYZ + faceNorm.XYZ() * lenDelta;
9241 // find point of intersection of the face plane located at baryCenter
9242 // and _normal located at newXYZ
9243 double d = -( faceNorm.XYZ() * baryCenter ); // d of plane equation ax+by+cz+d=0
9244 double dot = ( faceNorm.XYZ() * _normal );
9245 if ( dot < std::numeric_limits<double>::min() )
9246 dot = lenDelta * 1e-3;
9247 double step = -( faceNorm.XYZ() * newXYZ + d ) / dot;
9248 newXYZ += step * _normal;
9250 _lenFactor = _normal * ( newXYZ - oldXYZ ) / lenDelta; // _lenFactor is used in InvalidateStep()
9254 newXYZ = oldXYZ + _normal * lenDelta * _lenFactor;
9257 n->setXYZ( newXYZ.X(), newXYZ.Y(), newXYZ.Z() );
9258 _pos.push_back( newXYZ );
9260 if ( !eos._sWOL.IsNull() )
9264 if ( eos.SWOLType() == TopAbs_EDGE )
9266 double u = Precision::Infinite(); // to force projection w/o distance check
9267 uvOK = helper.CheckNodeU( TopoDS::Edge( eos._sWOL ), n, u,
9268 /*tol=*/2*lenDelta, /*force=*/true, distXYZ );
9269 _pos.back().SetCoord( u, 0, 0 );
9270 if ( _nodes.size() > 1 && uvOK )
9272 SMDS_EdgePosition* pos = static_cast<SMDS_EdgePosition*>( n->GetPosition() );
9273 pos->SetUParameter( u );
9278 gp_XY uv( Precision::Infinite(), 0 );
9279 uvOK = helper.CheckNodeUV( TopoDS::Face( eos._sWOL ), n, uv,
9280 /*tol=*/2*lenDelta, /*force=*/true, distXYZ );
9281 _pos.back().SetCoord( uv.X(), uv.Y(), 0 );
9282 if ( _nodes.size() > 1 && uvOK )
9284 SMDS_FacePosition* pos = static_cast<SMDS_FacePosition*>( n->GetPosition() );
9285 pos->SetUParameter( uv.X() );
9286 pos->SetVParameter( uv.Y() );
9291 n->setXYZ( distXYZ[1], distXYZ[2], distXYZ[3]);
9295 n->setXYZ( oldXYZ.X(), oldXYZ.Y(), oldXYZ.Z() );
9297 Block( eos.GetData() );
9305 if ( eos.ShapeType() != TopAbs_FACE )
9307 for ( size_t i = 0; i < _neibors.size(); ++i )
9308 //if ( _len > _neibors[i]->GetSmooLen() )
9309 _neibors[i]->Set( MOVED );
9313 dumpMove( n ); //debug
9316 //================================================================================
9318 * \brief Set BLOCKED flag and propagate limited _maxLen to _neibors
9320 //================================================================================
9322 void _LayerEdge::Block( _SolidData& data )
9324 //if ( Is( BLOCKED )) return;
9327 SMESH_Comment msg( "#BLOCK shape=");
9328 msg << data.GetShapeEdges( this )->_shapeID
9329 << ", nodes " << _nodes[0]->GetID() << ", " << _nodes.back()->GetID();
9330 dumpCmd( msg + " -- BEGIN")
9333 std::queue<_LayerEdge*> queue;
9336 gp_Pnt pSrc, pTgt, pSrcN, pTgtN;
9337 while ( !queue.empty() )
9339 _LayerEdge* edge = queue.front(); queue.pop();
9340 pSrc = SMESH_TNodeXYZ( edge->_nodes[0] );
9341 pTgt = SMESH_TNodeXYZ( edge->_nodes.back() );
9342 for ( size_t iN = 0; iN < edge->_neibors.size(); ++iN )
9344 _LayerEdge* neibor = edge->_neibors[iN];
9345 if ( neibor->_maxLen < edge->_maxLen * 1.01 )
9347 pSrcN = SMESH_TNodeXYZ( neibor->_nodes[0] );
9348 pTgtN = SMESH_TNodeXYZ( neibor->_nodes.back() );
9349 double minDist = pSrc.SquareDistance( pSrcN );
9350 minDist = Min( pTgt.SquareDistance( pTgtN ), minDist );
9351 minDist = Min( pSrc.SquareDistance( pTgtN ), minDist );
9352 minDist = Min( pTgt.SquareDistance( pSrcN ), minDist );
9353 double newMaxLen = edge->_maxLen + 0.5 * Sqrt( minDist );
9354 //if ( edge->_nodes[0]->getshapeId() == neibor->_nodes[0]->getshapeId() ) viscous_layers_00/A3
9356 newMaxLen *= edge->_lenFactor / neibor->_lenFactor;
9357 // newMaxLen *= Min( edge->_lenFactor / neibor->_lenFactor,
9358 // neibor->_lenFactor / edge->_lenFactor );
9360 if ( neibor->_maxLen > newMaxLen )
9362 neibor->_maxLen = newMaxLen;
9363 if ( neibor->_maxLen < neibor->_len )
9365 _EdgesOnShape* eos = data.GetShapeEdges( neibor );
9366 while ( neibor->_len > neibor->_maxLen &&
9367 neibor->NbSteps() > 1 )
9368 neibor->InvalidateStep( neibor->NbSteps(), *eos, /*restoreLength=*/true );
9369 neibor->SetNewLength( neibor->_maxLen, *eos, data.GetHelper() );
9370 //neibor->Block( data );
9372 queue.push( neibor );
9376 dumpCmd( msg + " -- END")
9379 //================================================================================
9381 * \brief Remove last inflation step
9383 //================================================================================
9385 void _LayerEdge::InvalidateStep( size_t curStep, const _EdgesOnShape& eos, bool restoreLength )
9387 if ( _pos.size() > curStep && _nodes.size() > 1 )
9389 _pos.resize( curStep );
9391 gp_Pnt nXYZ = _pos.back();
9392 SMDS_MeshNode* n = const_cast< SMDS_MeshNode*>( _nodes.back() );
9393 SMESH_TNodeXYZ curXYZ( n );
9394 if ( !eos._sWOL.IsNull() )
9396 TopLoc_Location loc;
9397 if ( eos.SWOLType() == TopAbs_EDGE )
9399 SMDS_EdgePosition* pos = static_cast<SMDS_EdgePosition*>( n->GetPosition() );
9400 pos->SetUParameter( nXYZ.X() );
9402 Handle(Geom_Curve) curve = BRep_Tool::Curve( TopoDS::Edge( eos._sWOL ), loc, f,l);
9403 nXYZ = curve->Value( nXYZ.X() ).Transformed( loc );
9407 SMDS_FacePosition* pos = static_cast<SMDS_FacePosition*>( n->GetPosition() );
9408 pos->SetUParameter( nXYZ.X() );
9409 pos->SetVParameter( nXYZ.Y() );
9410 Handle(Geom_Surface) surface = BRep_Tool::Surface( TopoDS::Face(eos._sWOL), loc );
9411 nXYZ = surface->Value( nXYZ.X(), nXYZ.Y() ).Transformed( loc );
9414 n->setXYZ( nXYZ.X(), nXYZ.Y(), nXYZ.Z() );
9417 if ( restoreLength )
9419 _len -= ( nXYZ.XYZ() - curXYZ ).Modulus() / _lenFactor;
9424 //================================================================================
9426 * \brief Return index of a _pos distant from _normal
9428 //================================================================================
9430 int _LayerEdge::GetSmoothedPos( const double tol )
9433 for ( size_t i = 1; i < _pos.size() && !iSmoothed; ++i )
9435 double normDist = ( _pos[i] - _pos[0] ).Crossed( _normal ).SquareModulus();
9436 if ( normDist > tol * tol )
9442 //================================================================================
9444 * \brief Smooth a path formed by _pos of a _LayerEdge smoothed on FACE
9446 //================================================================================
9448 void _LayerEdge::SmoothPos( const vector< double >& segLen, const double tol )
9450 if ( /*Is( NORMAL_UPDATED ) ||*/ _pos.size() <= 2 )
9453 // find the 1st smoothed _pos
9454 int iSmoothed = GetSmoothedPos( tol );
9455 if ( !iSmoothed ) return;
9457 //if ( 1 || Is( DISTORTED ))
9459 gp_XYZ normal = _normal;
9460 if ( Is( NORMAL_UPDATED ))
9461 for ( size_t i = 1; i < _pos.size(); ++i )
9463 normal = _pos[i] - _pos[0];
9464 double size = normal.Modulus();
9465 if ( size > RealSmall() )
9471 const double r = 0.2;
9472 for ( int iter = 0; iter < 50; ++iter )
9475 for ( size_t i = Max( 1, iSmoothed-1-iter ); i < _pos.size()-1; ++i )
9477 gp_XYZ midPos = 0.5 * ( _pos[i-1] + _pos[i+1] );
9478 gp_XYZ newPos = ( 1-r ) * midPos + r * _pos[i];
9480 double midLen = 0.5 * ( segLen[i-1] + segLen[i+1] );
9481 double newLen = ( 1-r ) * midLen + r * segLen[i];
9482 const_cast< double& >( segLen[i] ) = newLen;
9483 // check angle between normal and (_pos[i+1], _pos[i] )
9484 gp_XYZ posDir = _pos[i+1] - _pos[i];
9485 double size = posDir.SquareModulus();
9486 if ( size > RealSmall() )
9487 minDot = Min( minDot, ( normal * posDir ) * ( normal * posDir ) / size );
9489 if ( minDot > 0.5 * 0.5 )
9495 // for ( size_t i = 1; i < _pos.size()-1; ++i )
9497 // if ((int) i < iSmoothed && ( segLen[i] / segLen.back() < 0.5 ))
9500 // double wgt = segLen[i] / segLen.back();
9501 // gp_XYZ normPos = _pos[0] + _normal * wgt * _len;
9502 // gp_XYZ tgtPos = ( 1 - wgt ) * _pos[0] + wgt * _pos.back();
9503 // gp_XYZ newPos = ( 1 - wgt ) * normPos + wgt * tgtPos;
9504 // _pos[i] = newPos;
9509 //================================================================================
9511 * \brief Print flags
9513 //================================================================================
9515 std::string _LayerEdge::DumpFlags() const
9518 for ( int flag = 1; flag < 0x1000000; flag *= 2 )
9519 if ( _flags & flag )
9521 EFlags f = (EFlags) flag;
9523 case TO_SMOOTH: dump << "TO_SMOOTH"; break;
9524 case MOVED: dump << "MOVED"; break;
9525 case SMOOTHED: dump << "SMOOTHED"; break;
9526 case DIFFICULT: dump << "DIFFICULT"; break;
9527 case ON_CONCAVE_FACE: dump << "ON_CONCAVE_FACE"; break;
9528 case BLOCKED: dump << "BLOCKED"; break;
9529 case INTERSECTED: dump << "INTERSECTED"; break;
9530 case NORMAL_UPDATED: dump << "NORMAL_UPDATED"; break;
9531 case UPD_NORMAL_CONV: dump << "UPD_NORMAL_CONV"; break;
9532 case MARKED: dump << "MARKED"; break;
9533 case MULTI_NORMAL: dump << "MULTI_NORMAL"; break;
9534 case NEAR_BOUNDARY: dump << "NEAR_BOUNDARY"; break;
9535 case SMOOTHED_C1: dump << "SMOOTHED_C1"; break;
9536 case DISTORTED: dump << "DISTORTED"; break;
9537 case RISKY_SWOL: dump << "RISKY_SWOL"; break;
9538 case SHRUNK: dump << "SHRUNK"; break;
9539 case UNUSED_FLAG: dump << "UNUSED_FLAG"; break;
9543 cout << dump << endl;
9547 //================================================================================
9552 //================================================================================
9554 bool _ViscousBuilder::refine(_SolidData& data)
9556 SMESH_MesherHelper& helper = data.GetHelper();
9557 helper.SetElementsOnShape(false);
9559 Handle(Geom_Curve) curve;
9560 Handle(ShapeAnalysis_Surface) surface;
9561 TopoDS_Edge geomEdge;
9562 TopoDS_Face geomFace;
9563 TopLoc_Location loc;
9566 vector< gp_XYZ > pos3D;
9567 bool isOnEdge, isTooConvexFace = false;
9568 TGeomID prevBaseId = -1;
9569 TNode2Edge* n2eMap = 0;
9570 TNode2Edge::iterator n2e;
9572 // Create intermediate nodes on each _LayerEdge
9574 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
9576 _EdgesOnShape& eos = data._edgesOnShape[iS];
9577 if ( eos._edges.empty() ) continue;
9579 if ( eos._edges[0]->_nodes.size() < 2 )
9580 continue; // on _noShrinkShapes
9582 // get data of a shrink shape
9584 geomEdge.Nullify(); geomFace.Nullify();
9585 curve.Nullify(); surface.Nullify();
9586 if ( !eos._sWOL.IsNull() )
9588 isOnEdge = ( eos.SWOLType() == TopAbs_EDGE );
9591 geomEdge = TopoDS::Edge( eos._sWOL );
9592 curve = BRep_Tool::Curve( geomEdge, loc, f,l);
9596 geomFace = TopoDS::Face( eos._sWOL );
9597 surface = helper.GetSurface( geomFace );
9600 else if ( eos.ShapeType() == TopAbs_FACE && eos._toSmooth )
9602 geomFace = TopoDS::Face( eos._shape );
9603 surface = helper.GetSurface( geomFace );
9604 // propagate _toSmooth back to _eosC1, which was unset in findShapesToSmooth()
9605 for ( size_t i = 0; i < eos._eosC1.size(); ++i )
9607 eos._eosC1[ i ]->_toSmooth = true;
9608 for ( size_t j = 0; j < eos._eosC1[i]->_edges.size(); ++j )
9609 eos._eosC1[i]->_edges[j]->Set( _LayerEdge::SMOOTHED_C1 );
9611 isTooConvexFace = false;
9612 if ( _ConvexFace* cf = data.GetConvexFace( eos._shapeID ))
9613 isTooConvexFace = cf->_isTooCurved;
9616 vector< double > segLen;
9617 for ( size_t i = 0; i < eos._edges.size(); ++i )
9619 _LayerEdge& edge = *eos._edges[i];
9620 if ( edge._pos.size() < 2 )
9623 // get accumulated length of segments
9624 segLen.resize( edge._pos.size() );
9626 if ( eos._sWOL.IsNull() )
9628 bool useNormal = true;
9629 bool usePos = false;
9630 bool smoothed = false;
9631 double preci = 0.1 * edge._len;
9632 if ( eos._toSmooth && edge._pos.size() > 2 )
9634 smoothed = edge.GetSmoothedPos( preci );
9638 if ( !surface.IsNull() && !isTooConvexFace ) // edge smoothed on FACE
9640 useNormal = usePos = false;
9641 gp_Pnt2d uv = helper.GetNodeUV( geomFace, edge._nodes[0] );
9642 for ( size_t j = 1; j < edge._pos.size() && !useNormal; ++j )
9644 uv = surface->NextValueOfUV( uv, edge._pos[j], preci );
9645 if ( surface->Gap() < 2. * edge._len )
9646 segLen[j] = surface->Gap();
9652 else if ( !edge.Is( _LayerEdge::NORMAL_UPDATED ))
9654 #ifndef __NODES_AT_POS
9655 useNormal = usePos = false;
9656 edge._pos[1] = edge._pos.back();
9657 edge._pos.resize( 2 );
9659 segLen[ 1 ] = edge._len;
9662 if ( useNormal && edge.Is( _LayerEdge::NORMAL_UPDATED ))
9664 useNormal = usePos = false;
9665 _LayerEdge tmpEdge; // get original _normal
9666 tmpEdge._nodes.push_back( edge._nodes[0] );
9667 if ( !setEdgeData( tmpEdge, eos, helper, data ))
9670 for ( size_t j = 1; j < edge._pos.size(); ++j )
9671 segLen[j] = ( edge._pos[j] - edge._pos[0] ) * tmpEdge._normal;
9675 for ( size_t j = 1; j < edge._pos.size(); ++j )
9676 segLen[j] = ( edge._pos[j] - edge._pos[0] ) * edge._normal;
9680 for ( size_t j = 1; j < edge._pos.size(); ++j )
9681 segLen[j] = segLen[j-1] + ( edge._pos[j-1] - edge._pos[j] ).Modulus();
9685 bool swapped = ( edge._pos.size() > 2 );
9689 for ( size_t j = 1; j < edge._pos.size()-1; ++j )
9690 if ( segLen[j] > segLen.back() )
9692 segLen.erase( segLen.begin() + j );
9693 edge._pos.erase( edge._pos.begin() + j );
9696 else if ( segLen[j] < segLen[j-1] )
9698 std::swap( segLen[j], segLen[j-1] );
9699 std::swap( edge._pos[j], edge._pos[j-1] );
9704 // smooth a path formed by edge._pos
9705 #ifndef __NODES_AT_POS
9706 if (( smoothed ) /*&&
9707 ( eos.ShapeType() == TopAbs_FACE || edge.Is( _LayerEdge::SMOOTHED_C1 ))*/)
9708 edge.SmoothPos( segLen, preci );
9711 else if ( eos._isRegularSWOL ) // usual SWOL
9713 for ( size_t j = 1; j < edge._pos.size(); ++j )
9714 segLen[j] = segLen[j-1] + (edge._pos[j-1] - edge._pos[j] ).Modulus();
9716 else if ( !surface.IsNull() ) // SWOL surface with singularities
9718 pos3D.resize( edge._pos.size() );
9719 for ( size_t j = 0; j < edge._pos.size(); ++j )
9720 pos3D[j] = surface->Value( edge._pos[j].X(), edge._pos[j].Y() ).XYZ();
9722 for ( size_t j = 1; j < edge._pos.size(); ++j )
9723 segLen[j] = segLen[j-1] + ( pos3D[j-1] - pos3D[j] ).Modulus();
9726 // allocate memory for new nodes if it is not yet refined
9727 const SMDS_MeshNode* tgtNode = edge._nodes.back();
9728 if ( edge._nodes.size() == 2 )
9730 #ifdef __NODES_AT_POS
9731 int nbNodes = edge._pos.size();
9733 int nbNodes = eos._hyp.GetNumberLayers() + 1;
9735 edge._nodes.resize( nbNodes, 0 );
9737 edge._nodes.back() = tgtNode;
9739 // restore shapePos of the last node by already treated _LayerEdge of another _SolidData
9740 const TGeomID baseShapeId = edge._nodes[0]->getshapeId();
9741 if ( baseShapeId != prevBaseId )
9743 map< TGeomID, TNode2Edge* >::iterator s2ne = data._s2neMap.find( baseShapeId );
9744 n2eMap = ( s2ne == data._s2neMap.end() ) ? 0 : s2ne->second;
9745 prevBaseId = baseShapeId;
9747 _LayerEdge* edgeOnSameNode = 0;
9748 bool useExistingPos = false;
9749 if ( n2eMap && (( n2e = n2eMap->find( edge._nodes[0] )) != n2eMap->end() ))
9751 edgeOnSameNode = n2e->second;
9752 useExistingPos = ( edgeOnSameNode->_len < edge._len );
9753 const gp_XYZ& otherTgtPos = edgeOnSameNode->_pos.back();
9754 SMDS_PositionPtr lastPos = tgtNode->GetPosition();
9757 SMDS_EdgePosition* epos = static_cast<SMDS_EdgePosition*>( lastPos );
9758 epos->SetUParameter( otherTgtPos.X() );
9762 SMDS_FacePosition* fpos = static_cast<SMDS_FacePosition*>( lastPos );
9763 fpos->SetUParameter( otherTgtPos.X() );
9764 fpos->SetVParameter( otherTgtPos.Y() );
9767 // calculate height of the first layer
9769 const double T = segLen.back(); //data._hyp.GetTotalThickness();
9770 const double f = eos._hyp.GetStretchFactor();
9771 const int N = eos._hyp.GetNumberLayers();
9772 const double fPowN = pow( f, N );
9773 if ( fPowN - 1 <= numeric_limits<double>::min() )
9776 h0 = T * ( f - 1 )/( fPowN - 1 );
9778 const double zeroLen = std::numeric_limits<double>::min();
9780 // create intermediate nodes
9781 double hSum = 0, hi = h0/f;
9783 for ( size_t iStep = 1; iStep < edge._nodes.size(); ++iStep )
9785 // compute an intermediate position
9788 while ( hSum > segLen[iSeg] && iSeg < segLen.size()-1 )
9790 int iPrevSeg = iSeg-1;
9791 while ( fabs( segLen[iPrevSeg] - segLen[iSeg]) <= zeroLen && iPrevSeg > 0 )
9793 double r = ( segLen[iSeg] - hSum ) / ( segLen[iSeg] - segLen[iPrevSeg] );
9794 gp_Pnt pos = r * edge._pos[iPrevSeg] + (1-r) * edge._pos[iSeg];
9795 #ifdef __NODES_AT_POS
9796 pos = edge._pos[ iStep ];
9798 SMDS_MeshNode*& node = const_cast< SMDS_MeshNode*& >( edge._nodes[ iStep ]);
9799 if ( !eos._sWOL.IsNull() )
9801 // compute XYZ by parameters <pos>
9806 pos = curve->Value( u ).Transformed(loc);
9808 else if ( eos._isRegularSWOL )
9810 uv.SetCoord( pos.X(), pos.Y() );
9812 pos = surface->Value( pos.X(), pos.Y() );
9816 uv.SetCoord( pos.X(), pos.Y() );
9817 gp_Pnt p = r * pos3D[ iPrevSeg ] + (1-r) * pos3D[ iSeg ];
9818 uv = surface->NextValueOfUV( uv, p, BRep_Tool::Tolerance( geomFace )).XY();
9820 pos = surface->Value( uv );
9823 // create or update the node
9826 node = helper.AddNode( pos.X(), pos.Y(), pos.Z());
9827 if ( !eos._sWOL.IsNull() )
9830 getMeshDS()->SetNodeOnEdge( node, geomEdge, u );
9832 getMeshDS()->SetNodeOnFace( node, geomFace, uv.X(), uv.Y() );
9836 getMeshDS()->SetNodeInVolume( node, helper.GetSubShapeID() );
9841 if ( !eos._sWOL.IsNull() )
9843 // make average pos from new and current parameters
9846 //u = 0.5 * ( u + helper.GetNodeU( geomEdge, node ));
9847 if ( useExistingPos )
9848 u = helper.GetNodeU( geomEdge, node );
9849 pos = curve->Value( u ).Transformed(loc);
9851 SMDS_EdgePosition* epos = static_cast<SMDS_EdgePosition*>( node->GetPosition() );
9852 epos->SetUParameter( u );
9856 //uv = 0.5 * ( uv + helper.GetNodeUV( geomFace, node ));
9857 if ( useExistingPos )
9858 uv = helper.GetNodeUV( geomFace, node );
9859 pos = surface->Value( uv );
9861 SMDS_FacePosition* fpos = static_cast<SMDS_FacePosition*>( node->GetPosition() );
9862 fpos->SetUParameter( uv.X() );
9863 fpos->SetVParameter( uv.Y() );
9866 node->setXYZ( pos.X(), pos.Y(), pos.Z() );
9868 } // loop on edge._nodes
9870 if ( !eos._sWOL.IsNull() ) // prepare for shrink()
9873 edge._pos.back().SetCoord( u, 0,0);
9875 edge._pos.back().SetCoord( uv.X(), uv.Y() ,0);
9877 if ( edgeOnSameNode )
9878 edgeOnSameNode->_pos.back() = edge._pos.back();
9881 } // loop on eos._edges to create nodes
9884 if ( !getMeshDS()->IsEmbeddedMode() )
9885 // Log node movement
9886 for ( size_t i = 0; i < eos._edges.size(); ++i )
9888 SMESH_TNodeXYZ p ( eos._edges[i]->_nodes.back() );
9889 getMeshDS()->MoveNode( p._node, p.X(), p.Y(), p.Z() );
9896 helper.SetElementsOnShape(true);
9898 vector< vector<const SMDS_MeshNode*>* > nnVec;
9899 set< vector<const SMDS_MeshNode*>* > nnSet;
9900 set< int > degenEdgeInd;
9901 vector<const SMDS_MeshElement*> degenVols;
9903 TopExp_Explorer exp( data._solid, TopAbs_FACE );
9904 for ( ; exp.More(); exp.Next() )
9906 const TGeomID faceID = getMeshDS()->ShapeToIndex( exp.Current() );
9907 if ( data._ignoreFaceIds.count( faceID ))
9909 const bool isReversedFace = data._reversedFaceIds.count( faceID );
9910 SMESHDS_SubMesh* fSubM = getMeshDS()->MeshElements( exp.Current() );
9911 SMDS_ElemIteratorPtr fIt = fSubM->GetElements();
9912 while ( fIt->more() )
9914 const SMDS_MeshElement* face = fIt->next();
9915 const int nbNodes = face->NbCornerNodes();
9916 nnVec.resize( nbNodes );
9918 degenEdgeInd.clear();
9919 size_t maxZ = 0, minZ = std::numeric_limits<size_t>::max();
9920 SMDS_NodeIteratorPtr nIt = face->nodeIterator();
9921 for ( int iN = 0; iN < nbNodes; ++iN )
9923 const SMDS_MeshNode* n = nIt->next();
9924 _LayerEdge* edge = data._n2eMap[ n ];
9925 const int i = isReversedFace ? nbNodes-1-iN : iN;
9926 nnVec[ i ] = & edge->_nodes;
9927 maxZ = std::max( maxZ, nnVec[ i ]->size() );
9928 minZ = std::min( minZ, nnVec[ i ]->size() );
9930 if ( helper.HasDegeneratedEdges() )
9931 nnSet.insert( nnVec[ i ]);
9936 if ( 0 < nnSet.size() && nnSet.size() < 3 )
9944 for ( size_t iZ = 1; iZ < minZ; ++iZ )
9945 helper.AddVolume( (*nnVec[0])[iZ-1], (*nnVec[1])[iZ-1], (*nnVec[2])[iZ-1],
9946 (*nnVec[0])[iZ], (*nnVec[1])[iZ], (*nnVec[2])[iZ]);
9948 for ( size_t iZ = minZ; iZ < maxZ; ++iZ )
9950 for ( int iN = 0; iN < nbNodes; ++iN )
9951 if ( nnVec[ iN ]->size() < iZ+1 )
9952 degenEdgeInd.insert( iN );
9954 if ( degenEdgeInd.size() == 1 ) // PYRAM
9956 int i2 = *degenEdgeInd.begin();
9957 int i0 = helper.WrapIndex( i2 - 1, nbNodes );
9958 int i1 = helper.WrapIndex( i2 + 1, nbNodes );
9959 helper.AddVolume( (*nnVec[i0])[iZ-1], (*nnVec[i1])[iZ-1],
9960 (*nnVec[i1])[iZ ], (*nnVec[i0])[iZ ], (*nnVec[i2]).back());
9964 int i3 = !degenEdgeInd.count(0) ? 0 : !degenEdgeInd.count(1) ? 1 : 2;
9965 helper.AddVolume( (*nnVec[ 0 ])[ i3 == 0 ? iZ-1 : nnVec[0]->size()-1 ],
9966 (*nnVec[ 1 ])[ i3 == 1 ? iZ-1 : nnVec[1]->size()-1 ],
9967 (*nnVec[ 2 ])[ i3 == 2 ? iZ-1 : nnVec[2]->size()-1 ],
9968 (*nnVec[ i3 ])[ iZ ]);
9976 for ( size_t iZ = 1; iZ < minZ; ++iZ )
9977 helper.AddVolume( (*nnVec[0])[iZ-1], (*nnVec[1])[iZ-1],
9978 (*nnVec[2])[iZ-1], (*nnVec[3])[iZ-1],
9979 (*nnVec[0])[iZ], (*nnVec[1])[iZ],
9980 (*nnVec[2])[iZ], (*nnVec[3])[iZ]);
9982 for ( size_t iZ = minZ; iZ < maxZ; ++iZ )
9984 for ( int iN = 0; iN < nbNodes; ++iN )
9985 if ( nnVec[ iN ]->size() < iZ+1 )
9986 degenEdgeInd.insert( iN );
9988 switch ( degenEdgeInd.size() )
9992 int i2 = *degenEdgeInd.begin();
9993 int i3 = *degenEdgeInd.rbegin();
9994 bool ok = ( i3 - i2 == 1 );
9995 if ( i2 == 0 && i3 == 3 ) { i2 = 3; i3 = 0; ok = true; }
9996 int i0 = helper.WrapIndex( i3 + 1, nbNodes );
9997 int i1 = helper.WrapIndex( i0 + 1, nbNodes );
9999 const SMDS_MeshElement* vol =
10000 helper.AddVolume( nnVec[i3]->back(), (*nnVec[i0])[iZ], (*nnVec[i0])[iZ-1],
10001 nnVec[i2]->back(), (*nnVec[i1])[iZ], (*nnVec[i1])[iZ-1]);
10003 degenVols.push_back( vol );
10007 default: // degen HEX
10009 const SMDS_MeshElement* vol =
10010 helper.AddVolume( nnVec[0]->size() > iZ-1 ? (*nnVec[0])[iZ-1] : nnVec[0]->back(),
10011 nnVec[1]->size() > iZ-1 ? (*nnVec[1])[iZ-1] : nnVec[1]->back(),
10012 nnVec[2]->size() > iZ-1 ? (*nnVec[2])[iZ-1] : nnVec[2]->back(),
10013 nnVec[3]->size() > iZ-1 ? (*nnVec[3])[iZ-1] : nnVec[3]->back(),
10014 nnVec[0]->size() > iZ ? (*nnVec[0])[iZ] : nnVec[0]->back(),
10015 nnVec[1]->size() > iZ ? (*nnVec[1])[iZ] : nnVec[1]->back(),
10016 nnVec[2]->size() > iZ ? (*nnVec[2])[iZ] : nnVec[2]->back(),
10017 nnVec[3]->size() > iZ ? (*nnVec[3])[iZ] : nnVec[3]->back());
10018 degenVols.push_back( vol );
10025 return error("Not supported type of element", data._index);
10027 } // switch ( nbNodes )
10028 } // while ( fIt->more() )
10031 if ( !degenVols.empty() )
10033 SMESH_ComputeErrorPtr& err = _mesh->GetSubMesh( data._solid )->GetComputeError();
10034 if ( !err || err->IsOK() )
10036 err.reset( new SMESH_ComputeError( COMPERR_WARNING,
10037 "Bad quality volumes created" ));
10038 err->myBadElements.insert( err->myBadElements.end(),
10039 degenVols.begin(),degenVols.end() );
10046 //================================================================================
10048 * \brief Shrink 2D mesh on faces to let space for inflated layers
10050 //================================================================================
10052 bool _ViscousBuilder::shrink(_SolidData& theData)
10054 // make map of (ids of FACEs to shrink mesh on) to (list of _SolidData containing
10055 // _LayerEdge's inflated along FACE or EDGE)
10056 map< TGeomID, list< _SolidData* > > f2sdMap;
10057 for ( size_t i = 0 ; i < _sdVec.size(); ++i )
10059 _SolidData& data = _sdVec[i];
10060 map< TGeomID, TopoDS_Shape >::iterator s2s = data._shrinkShape2Shape.begin();
10061 for (; s2s != data._shrinkShape2Shape.end(); ++s2s )
10062 if ( s2s->second.ShapeType() == TopAbs_FACE && !_shrinkedFaces.Contains( s2s->second ))
10064 f2sdMap[ getMeshDS()->ShapeToIndex( s2s->second )].push_back( &data );
10066 // Put mesh faces on the shrinked FACE to the proxy sub-mesh to avoid
10067 // usage of mesh faces made in addBoundaryElements() by the 3D algo or
10068 // by StdMeshers_QuadToTriaAdaptor
10069 if ( SMESHDS_SubMesh* smDS = getMeshDS()->MeshElements( s2s->second ))
10071 SMESH_ProxyMesh::SubMesh* proxySub =
10072 data._proxyMesh->getFaceSubM( TopoDS::Face( s2s->second ), /*create=*/true);
10073 if ( proxySub->NbElements() == 0 )
10075 SMDS_ElemIteratorPtr fIt = smDS->GetElements();
10076 while ( fIt->more() )
10078 const SMDS_MeshElement* f = fIt->next();
10079 // as a result 3D algo will use elements from proxySub and not from smDS
10080 proxySub->AddElement( f );
10081 f->setIsMarked( true );
10083 // Mark nodes on the FACE to discriminate them from nodes
10084 // added by addBoundaryElements(); marked nodes are to be smoothed while shrink()
10085 for ( int iN = 0, nbN = f->NbNodes(); iN < nbN; ++iN )
10087 const SMDS_MeshNode* n = f->GetNode( iN );
10088 if ( n->GetPosition()->GetDim() == 2 )
10089 n->setIsMarked( true );
10097 SMESH_MesherHelper helper( *_mesh );
10098 helper.ToFixNodeParameters( true );
10101 map< TGeomID, _Shrinker1D > e2shrMap;
10102 vector< _EdgesOnShape* > subEOS;
10103 vector< _LayerEdge* > lEdges;
10105 // loop on FACEs to srink mesh on
10106 map< TGeomID, list< _SolidData* > >::iterator f2sd = f2sdMap.begin();
10107 for ( ; f2sd != f2sdMap.end(); ++f2sd )
10109 list< _SolidData* > & dataList = f2sd->second;
10110 if ( dataList.front()->_n2eMap.empty() ||
10111 dataList.back() ->_n2eMap.empty() )
10112 continue; // not yet computed
10113 if ( dataList.front() != &theData &&
10114 dataList.back() != &theData )
10117 _SolidData& data = *dataList.front();
10118 _SolidData* data2 = dataList.size() > 1 ? dataList.back() : 0;
10119 const TopoDS_Face& F = TopoDS::Face( getMeshDS()->IndexToShape( f2sd->first ));
10120 SMESH_subMesh* sm = _mesh->GetSubMesh( F );
10121 SMESHDS_SubMesh* smDS = sm->GetSubMeshDS();
10123 Handle(Geom_Surface) surface = BRep_Tool::Surface( F );
10125 _shrinkedFaces.Add( F );
10126 helper.SetSubShape( F );
10128 // ===========================
10129 // Prepare data for shrinking
10130 // ===========================
10132 // Collect nodes to smooth (they are marked at the beginning of this method)
10133 vector < const SMDS_MeshNode* > smoothNodes;
10135 SMDS_NodeIteratorPtr nIt = smDS->GetNodes();
10136 while ( nIt->more() )
10138 const SMDS_MeshNode* n = nIt->next();
10139 if ( n->isMarked() )
10140 smoothNodes.push_back( n );
10143 // Find out face orientation
10144 double refSign = 1;
10145 const set<TGeomID> ignoreShapes;
10147 if ( !smoothNodes.empty() )
10149 vector<_Simplex> simplices;
10150 _Simplex::GetSimplices( smoothNodes[0], simplices, ignoreShapes );
10151 helper.GetNodeUV( F, simplices[0]._nPrev, 0, &isOkUV ); // fix UV of simplex nodes
10152 helper.GetNodeUV( F, simplices[0]._nNext, 0, &isOkUV );
10153 gp_XY uv = helper.GetNodeUV( F, smoothNodes[0], 0, &isOkUV );
10154 if ( !simplices[0].IsForward(uv, smoothNodes[0], F, helper, refSign ))
10158 // Find _LayerEdge's inflated along F
10162 SMESH_subMeshIteratorPtr subIt = sm->getDependsOnIterator(/*includeSelf=*/false,
10163 /*complexFirst=*/true); //!!!
10164 while ( subIt->more() )
10166 const TGeomID subID = subIt->next()->GetId();
10167 if ( data._noShrinkShapes.count( subID ))
10169 _EdgesOnShape* eos = data.GetShapeEdges( subID );
10170 if ( !eos || eos->_sWOL.IsNull() )
10171 if ( data2 ) // check in adjacent SOLID
10173 eos = data2->GetShapeEdges( subID );
10174 if ( !eos || eos->_sWOL.IsNull() )
10177 subEOS.push_back( eos );
10179 for ( size_t i = 0; i < eos->_edges.size(); ++i )
10181 lEdges.push_back( eos->_edges[ i ] );
10182 prepareEdgeToShrink( *eos->_edges[ i ], *eos, helper, smDS );
10187 dumpFunction(SMESH_Comment("beforeShrinkFace")<<f2sd->first); // debug
10188 SMDS_ElemIteratorPtr fIt = smDS->GetElements();
10189 while ( fIt->more() )
10190 if ( const SMDS_MeshElement* f = fIt->next() )
10191 dumpChangeNodes( f );
10194 // Replace source nodes by target nodes in mesh faces to shrink
10195 dumpFunction(SMESH_Comment("replNodesOnFace")<<f2sd->first); // debug
10196 const SMDS_MeshNode* nodes[20];
10197 for ( size_t iS = 0; iS < subEOS.size(); ++iS )
10199 _EdgesOnShape& eos = * subEOS[ iS ];
10200 for ( size_t i = 0; i < eos._edges.size(); ++i )
10202 _LayerEdge& edge = *eos._edges[i];
10203 const SMDS_MeshNode* srcNode = edge._nodes[0];
10204 const SMDS_MeshNode* tgtNode = edge._nodes.back();
10205 SMDS_ElemIteratorPtr fIt = srcNode->GetInverseElementIterator(SMDSAbs_Face);
10206 while ( fIt->more() )
10208 const SMDS_MeshElement* f = fIt->next();
10209 if ( !smDS->Contains( f ) || !f->isMarked() )
10211 SMDS_NodeIteratorPtr nIt = f->nodeIterator();
10212 for ( int iN = 0; nIt->more(); ++iN )
10214 const SMDS_MeshNode* n = nIt->next();
10215 nodes[iN] = ( n == srcNode ? tgtNode : n );
10217 helper.GetMeshDS()->ChangeElementNodes( f, nodes, f->NbNodes() );
10218 dumpChangeNodes( f );
10224 // find out if a FACE is concave
10225 const bool isConcaveFace = isConcave( F, helper );
10227 // Create _SmoothNode's on face F
10228 vector< _SmoothNode > nodesToSmooth( smoothNodes.size() );
10230 dumpFunction(SMESH_Comment("fixUVOnFace")<<f2sd->first); // debug
10231 const bool sortSimplices = isConcaveFace;
10232 for ( size_t i = 0; i < smoothNodes.size(); ++i )
10234 const SMDS_MeshNode* n = smoothNodes[i];
10235 nodesToSmooth[ i ]._node = n;
10236 // src nodes must be already replaced by tgt nodes to have tgt nodes in _simplices
10237 _Simplex::GetSimplices( n, nodesToSmooth[ i ]._simplices, ignoreShapes, 0, sortSimplices);
10238 // fix up incorrect uv of nodes on the FACE
10239 helper.GetNodeUV( F, n, 0, &isOkUV);
10244 //if ( nodesToSmooth.empty() ) continue;
10246 // Find EDGE's to shrink and set simpices to LayerEdge's
10247 set< _Shrinker1D* > eShri1D;
10249 for ( size_t iS = 0; iS < subEOS.size(); ++iS )
10251 _EdgesOnShape& eos = * subEOS[ iS ];
10252 if ( eos.SWOLType() == TopAbs_EDGE )
10254 SMESH_subMesh* edgeSM = _mesh->GetSubMesh( eos._sWOL );
10255 _Shrinker1D& srinker = e2shrMap[ edgeSM->GetId() ];
10256 eShri1D.insert( & srinker );
10257 srinker.AddEdge( eos._edges[0], eos, helper );
10258 VISCOUS_3D::ToClearSubWithMain( edgeSM, data._solid );
10259 // restore params of nodes on EGDE if the EDGE has been already
10260 // srinked while srinking other FACE
10261 srinker.RestoreParams();
10263 for ( size_t i = 0; i < eos._edges.size(); ++i )
10265 _LayerEdge& edge = * eos._edges[i];
10266 _Simplex::GetSimplices( /*tgtNode=*/edge._nodes.back(), edge._simplices, ignoreShapes );
10268 // additionally mark tgt node; only marked nodes will be used in SetNewLength2d()
10269 // not-marked nodes are those added by refine()
10270 edge._nodes.back()->setIsMarked( true );
10275 bool toFixTria = false; // to improve quality of trias by diagonal swap
10276 if ( isConcaveFace )
10278 const bool hasTria = _mesh->NbTriangles(), hasQuad = _mesh->NbQuadrangles();
10279 if ( hasTria != hasQuad ) {
10280 toFixTria = hasTria;
10283 set<int> nbNodesSet;
10284 SMDS_ElemIteratorPtr fIt = smDS->GetElements();
10285 while ( fIt->more() && nbNodesSet.size() < 2 )
10286 nbNodesSet.insert( fIt->next()->NbCornerNodes() );
10287 toFixTria = ( *nbNodesSet.begin() == 3 );
10291 // ==================
10292 // Perform shrinking
10293 // ==================
10295 bool shrinked = true;
10296 int nbBad, shriStep=0, smooStep=0;
10297 _SmoothNode::SmoothType smoothType
10298 = isConcaveFace ? _SmoothNode::ANGULAR : _SmoothNode::LAPLACIAN;
10299 SMESH_Comment errMsg;
10303 // Move boundary nodes (actually just set new UV)
10304 // -----------------------------------------------
10305 dumpFunction(SMESH_Comment("moveBoundaryOnF")<<f2sd->first<<"_st"<<shriStep ); // debug
10307 for ( size_t iS = 0; iS < subEOS.size(); ++iS )
10309 _EdgesOnShape& eos = * subEOS[ iS ];
10310 for ( size_t i = 0; i < eos._edges.size(); ++i )
10312 shrinked |= eos._edges[i]->SetNewLength2d( surface, F, eos, helper );
10317 // Move nodes on EDGE's
10318 // (XYZ is set as soon as a needed length reached in SetNewLength2d())
10319 set< _Shrinker1D* >::iterator shr = eShri1D.begin();
10320 for ( ; shr != eShri1D.end(); ++shr )
10321 (*shr)->Compute( /*set3D=*/false, helper );
10324 // -----------------
10325 int nbNoImpSteps = 0;
10328 while (( nbNoImpSteps < 5 && nbBad > 0) && moved)
10330 dumpFunction(SMESH_Comment("shrinkFace")<<f2sd->first<<"_st"<<++smooStep); // debug
10332 int oldBadNb = nbBad;
10335 // '% 5' minimizes NB FUNCTIONS on viscous_layers_00/B2 case
10336 _SmoothNode::SmoothType smooTy = ( smooStep % 5 ) ? smoothType : _SmoothNode::LAPLACIAN;
10337 for ( size_t i = 0; i < nodesToSmooth.size(); ++i )
10339 moved |= nodesToSmooth[i].Smooth( nbBad, surface, helper, refSign,
10340 smooTy, /*set3D=*/isConcaveFace);
10342 if ( nbBad < oldBadNb )
10352 errMsg << "Can't shrink 2D mesh on face " << f2sd->first;
10353 if ( shriStep > 200 )
10354 errMsg << "Infinite loop at shrinking 2D mesh on face " << f2sd->first;
10355 if ( !errMsg.empty() )
10358 // Fix narrow triangles by swapping diagonals
10359 // ---------------------------------------
10362 set<const SMDS_MeshNode*> usedNodes;
10363 fixBadFaces( F, helper, /*is2D=*/true, shriStep, & usedNodes); // swap diagonals
10365 // update working data
10366 set<const SMDS_MeshNode*>::iterator n;
10367 for ( size_t i = 0; i < nodesToSmooth.size() && !usedNodes.empty(); ++i )
10369 n = usedNodes.find( nodesToSmooth[ i ]._node );
10370 if ( n != usedNodes.end())
10372 _Simplex::GetSimplices( nodesToSmooth[ i ]._node,
10373 nodesToSmooth[ i ]._simplices,
10374 ignoreShapes, NULL,
10375 /*sortSimplices=*/ smoothType == _SmoothNode::ANGULAR );
10376 usedNodes.erase( n );
10379 for ( size_t i = 0; i < lEdges.size() && !usedNodes.empty(); ++i )
10381 n = usedNodes.find( /*tgtNode=*/ lEdges[i]->_nodes.back() );
10382 if ( n != usedNodes.end())
10384 _Simplex::GetSimplices( lEdges[i]->_nodes.back(),
10385 lEdges[i]->_simplices,
10387 usedNodes.erase( n );
10391 // TODO: check effect of this additional smooth
10392 // additional laplacian smooth to increase allowed shrink step
10393 // for ( int st = 1; st; --st )
10395 // dumpFunction(SMESH_Comment("shrinkFace")<<f2sd->first<<"_st"<<++smooStep); // debug
10396 // for ( size_t i = 0; i < nodesToSmooth.size(); ++i )
10398 // nodesToSmooth[i].Smooth( nbBad,surface,helper,refSign,
10399 // _SmoothNode::LAPLACIAN,/*set3D=*/false);
10403 } // while ( shrinked )
10405 if ( !errMsg.empty() ) // Try to re-compute the shrink FACE
10407 debugMsg( "Re-compute FACE " << f2sd->first << " because " << errMsg );
10410 SMESHDS_SubMesh* psm = data._proxyMesh->getFaceSubM( F );
10412 vector< const SMDS_MeshElement* > facesToRm;
10415 facesToRm.reserve( psm->NbElements() );
10416 for ( SMDS_ElemIteratorPtr ite = psm->GetElements(); ite->more(); )
10417 facesToRm.push_back( ite->next() );
10419 for ( size_t i = 0 ; i < _sdVec.size(); ++i )
10420 if (( psm = _sdVec[i]._proxyMesh->getFaceSubM( F )))
10423 for ( size_t i = 0; i < facesToRm.size(); ++i )
10424 getMeshDS()->RemoveFreeElement( facesToRm[i], smDS, /*fromGroups=*/false );
10428 TIDSortedNodeSet nodesToKeep; // nodes of _LayerEdge to keep
10429 for ( size_t iS = 0; iS < subEOS.size(); ++iS ) {
10430 for ( size_t i = 0; i < subEOS[iS]->_edges.size(); ++i )
10431 nodesToKeep.insert( ++( subEOS[iS]->_edges[i]->_nodes.begin() ),
10432 subEOS[iS]->_edges[i]->_nodes.end() );
10434 SMDS_NodeIteratorPtr itn = smDS->GetNodes();
10435 while ( itn->more() ) {
10436 const SMDS_MeshNode* n = itn->next();
10437 if ( !nodesToKeep.count( n ))
10438 getMeshDS()->RemoveFreeNode( n, smDS, /*fromGroups=*/false );
10441 // restore position and UV of target nodes
10443 for ( size_t iS = 0; iS < subEOS.size(); ++iS )
10444 for ( size_t i = 0; i < subEOS[iS]->_edges.size(); ++i )
10446 _LayerEdge* edge = subEOS[iS]->_edges[i];
10447 SMDS_MeshNode* tgtNode = const_cast< SMDS_MeshNode*& >( edge->_nodes.back() );
10448 if ( edge->_pos.empty() ||
10449 edge->Is( _LayerEdge::SHRUNK )) continue;
10450 if ( subEOS[iS]->SWOLType() == TopAbs_FACE )
10452 SMDS_FacePosition* pos = static_cast<SMDS_FacePosition*>( tgtNode->GetPosition() );
10453 pos->SetUParameter( edge->_pos[0].X() );
10454 pos->SetVParameter( edge->_pos[0].Y() );
10455 p = surface->Value( edge->_pos[0].X(), edge->_pos[0].Y() );
10459 SMDS_EdgePosition* pos = static_cast<SMDS_EdgePosition*>( tgtNode->GetPosition() );
10460 pos->SetUParameter( edge->_pos[0].Coord( U_TGT ));
10461 p = BRepAdaptor_Curve( TopoDS::Edge( subEOS[iS]->_sWOL )).Value( pos->GetUParameter() );
10463 tgtNode->setXYZ( p.X(), p.Y(), p.Z() );
10464 dumpMove( tgtNode );
10466 // shrink EDGE sub-meshes and set proxy sub-meshes
10467 UVPtStructVec uvPtVec;
10468 set< _Shrinker1D* >::iterator shrIt = eShri1D.begin();
10469 for ( shrIt = eShri1D.begin(); shrIt != eShri1D.end(); ++shrIt )
10471 _Shrinker1D* shr = (*shrIt);
10472 shr->Compute( /*set3D=*/true, helper );
10474 // set proxy mesh of EDGEs w/o layers
10475 map< double, const SMDS_MeshNode* > nodes;
10476 SMESH_Algo::GetSortedNodesOnEdge( getMeshDS(), shr->GeomEdge(),/*skipMedium=*/true, nodes);
10477 // remove refinement nodes
10478 const SMDS_MeshNode* sn0 = shr->SrcNode(0), *sn1 = shr->SrcNode(1);
10479 const SMDS_MeshNode* tn0 = shr->TgtNode(0), *tn1 = shr->TgtNode(1);
10480 map< double, const SMDS_MeshNode* >::iterator u2n = nodes.begin();
10481 if ( u2n->second == sn0 || u2n->second == sn1 )
10483 while ( u2n->second != tn0 && u2n->second != tn1 )
10485 nodes.erase( nodes.begin(), u2n );
10487 u2n = --nodes.end();
10488 if ( u2n->second == sn0 || u2n->second == sn1 )
10490 while ( u2n->second != tn0 && u2n->second != tn1 )
10492 nodes.erase( ++u2n, nodes.end() );
10494 // set proxy sub-mesh
10495 uvPtVec.resize( nodes.size() );
10496 u2n = nodes.begin();
10497 BRepAdaptor_Curve2d curve( shr->GeomEdge(), F );
10498 for ( size_t i = 0; i < nodes.size(); ++i, ++u2n )
10500 uvPtVec[ i ].node = u2n->second;
10501 uvPtVec[ i ].param = u2n->first;
10502 uvPtVec[ i ].SetUV( curve.Value( u2n->first ).XY() );
10504 StdMeshers_FaceSide fSide( uvPtVec, F, shr->GeomEdge(), _mesh );
10505 StdMeshers_ViscousLayers2D::SetProxyMeshOfEdge( fSide );
10508 // set proxy mesh of EDGEs with layers
10509 vector< _LayerEdge* > edges;
10510 for ( size_t iS = 0; iS < subEOS.size(); ++iS )
10512 _EdgesOnShape& eos = * subEOS[ iS ];
10513 if ( eos.ShapeType() != TopAbs_EDGE ) continue;
10515 const TopoDS_Edge& E = TopoDS::Edge( eos._shape );
10516 data.SortOnEdge( E, eos._edges );
10519 if ( _EdgesOnShape* eov = data.GetShapeEdges( helper.IthVertex( 0, E, /*CumOri=*/false )))
10520 if ( !eov->_edges.empty() )
10521 edges.push_back( eov->_edges[0] ); // on 1st VERTEX
10523 edges.insert( edges.end(), eos._edges.begin(), eos._edges.end() );
10525 if ( _EdgesOnShape* eov = data.GetShapeEdges( helper.IthVertex( 1, E, /*CumOri=*/false )))
10526 if ( !eov->_edges.empty() )
10527 edges.push_back( eov->_edges[0] ); // on last VERTEX
10529 uvPtVec.resize( edges.size() );
10530 for ( size_t i = 0; i < edges.size(); ++i )
10532 uvPtVec[ i ].node = edges[i]->_nodes.back();
10533 uvPtVec[ i ].param = helper.GetNodeU( E, edges[i]->_nodes[0] );
10534 uvPtVec[ i ].SetUV( helper.GetNodeUV( F, edges[i]->_nodes.back() ));
10536 BRep_Tool::Range( E, uvPtVec[0].param, uvPtVec.back().param );
10537 StdMeshers_FaceSide fSide( uvPtVec, F, E, _mesh );
10538 StdMeshers_ViscousLayers2D::SetProxyMeshOfEdge( fSide );
10540 // temporary clear the FACE sub-mesh from faces made by refine()
10541 vector< const SMDS_MeshElement* > elems;
10542 elems.reserve( smDS->NbElements() + smDS->NbNodes() );
10543 for ( SMDS_ElemIteratorPtr ite = smDS->GetElements(); ite->more(); )
10544 elems.push_back( ite->next() );
10545 for ( SMDS_NodeIteratorPtr ite = smDS->GetNodes(); ite->more(); )
10546 elems.push_back( ite->next() );
10549 // compute the mesh on the FACE
10550 sm->ComputeStateEngine( SMESH_subMesh::CHECK_COMPUTE_STATE );
10551 sm->ComputeStateEngine( SMESH_subMesh::COMPUTE_SUBMESH );
10553 // re-fill proxy sub-meshes of the FACE
10554 for ( size_t i = 0 ; i < _sdVec.size(); ++i )
10555 if (( psm = _sdVec[i]._proxyMesh->getFaceSubM( F )))
10556 for ( SMDS_ElemIteratorPtr ite = smDS->GetElements(); ite->more(); )
10557 psm->AddElement( ite->next() );
10560 for ( size_t i = 0; i < elems.size(); ++i )
10561 smDS->AddElement( elems[i] );
10563 if ( sm->GetComputeState() != SMESH_subMesh::COMPUTE_OK )
10564 return error( errMsg );
10566 } // end of re-meshing in case of failed smoothing
10569 // No wrongly shaped faces remain; final smooth. Set node XYZ.
10570 bool isStructuredFixed = false;
10571 if ( SMESH_2D_Algo* algo = dynamic_cast<SMESH_2D_Algo*>( sm->GetAlgo() ))
10572 isStructuredFixed = algo->FixInternalNodes( *data._proxyMesh, F );
10573 if ( !isStructuredFixed )
10575 if ( isConcaveFace ) // fix narrow faces by swapping diagonals
10576 fixBadFaces( F, helper, /*is2D=*/false, ++shriStep );
10578 for ( int st = 3; st; --st )
10581 case 1: smoothType = _SmoothNode::LAPLACIAN; break;
10582 case 2: smoothType = _SmoothNode::LAPLACIAN; break;
10583 case 3: smoothType = _SmoothNode::ANGULAR; break;
10585 dumpFunction(SMESH_Comment("shrinkFace")<<f2sd->first<<"_st"<<++smooStep); // debug
10586 for ( size_t i = 0; i < nodesToSmooth.size(); ++i )
10588 nodesToSmooth[i].Smooth( nbBad,surface,helper,refSign,
10589 smoothType,/*set3D=*/st==1 );
10594 if ( !getMeshDS()->IsEmbeddedMode() )
10595 // Log node movement
10596 for ( size_t i = 0; i < nodesToSmooth.size(); ++i )
10598 SMESH_TNodeXYZ p ( nodesToSmooth[i]._node );
10599 getMeshDS()->MoveNode( nodesToSmooth[i]._node, p.X(), p.Y(), p.Z() );
10603 // Set an event listener to clear FACE sub-mesh together with SOLID sub-mesh
10604 VISCOUS_3D::ToClearSubWithMain( sm, data._solid );
10606 VISCOUS_3D::ToClearSubWithMain( sm, data2->_solid );
10608 } // loop on FACES to srink mesh on
10611 // Replace source nodes by target nodes in shrinked mesh edges
10613 map< int, _Shrinker1D >::iterator e2shr = e2shrMap.begin();
10614 for ( ; e2shr != e2shrMap.end(); ++e2shr )
10615 e2shr->second.SwapSrcTgtNodes( getMeshDS() );
10620 //================================================================================
10622 * \brief Computes 2d shrink direction and finds nodes limiting shrinking
10624 //================================================================================
10626 bool _ViscousBuilder::prepareEdgeToShrink( _LayerEdge& edge,
10627 _EdgesOnShape& eos,
10628 SMESH_MesherHelper& helper,
10629 const SMESHDS_SubMesh* faceSubMesh)
10631 const SMDS_MeshNode* srcNode = edge._nodes[0];
10632 const SMDS_MeshNode* tgtNode = edge._nodes.back();
10634 if ( eos.SWOLType() == TopAbs_FACE )
10636 if ( tgtNode->GetPosition()->GetDim() != 2 ) // not inflated edge
10639 edge.Set( _LayerEdge::SHRUNK );
10640 return srcNode == tgtNode;
10642 gp_XY srcUV ( edge._pos[0].X(), edge._pos[0].Y() ); //helper.GetNodeUV( F, srcNode );
10643 gp_XY tgtUV = edge.LastUV( TopoDS::Face( eos._sWOL ), eos ); //helper.GetNodeUV( F, tgtNode );
10644 gp_Vec2d uvDir( srcUV, tgtUV );
10645 double uvLen = uvDir.Magnitude();
10647 edge._normal.SetCoord( uvDir.X(),uvDir.Y(), 0 );
10650 //edge._pos.resize(1);
10651 edge._pos[0].SetCoord( tgtUV.X(), tgtUV.Y(), 0 );
10653 // set UV of source node to target node
10654 SMDS_FacePosition* pos = static_cast<SMDS_FacePosition*>( tgtNode->GetPosition() );
10655 pos->SetUParameter( srcUV.X() );
10656 pos->SetVParameter( srcUV.Y() );
10658 else // _sWOL is TopAbs_EDGE
10660 if ( tgtNode->GetPosition()->GetDim() != 1 ) // not inflated edge
10663 edge.Set( _LayerEdge::SHRUNK );
10664 return srcNode == tgtNode;
10666 const TopoDS_Edge& E = TopoDS::Edge( eos._sWOL );
10667 SMESHDS_SubMesh* edgeSM = getMeshDS()->MeshElements( E );
10668 if ( !edgeSM || edgeSM->NbElements() == 0 )
10669 return error(SMESH_Comment("Not meshed EDGE ") << getMeshDS()->ShapeToIndex( E ));
10671 const SMDS_MeshNode* n2 = 0;
10672 SMDS_ElemIteratorPtr eIt = srcNode->GetInverseElementIterator(SMDSAbs_Edge);
10673 while ( eIt->more() && !n2 )
10675 const SMDS_MeshElement* e = eIt->next();
10676 if ( !edgeSM->Contains(e)) continue;
10677 n2 = e->GetNode( 0 );
10678 if ( n2 == srcNode ) n2 = e->GetNode( 1 );
10681 return error(SMESH_Comment("Wrongly meshed EDGE ") << getMeshDS()->ShapeToIndex( E ));
10683 double uSrc = helper.GetNodeU( E, srcNode, n2 );
10684 double uTgt = helper.GetNodeU( E, tgtNode, srcNode );
10685 double u2 = helper.GetNodeU( E, n2, srcNode );
10687 //edge._pos.clear();
10689 if ( fabs( uSrc-uTgt ) < 0.99 * fabs( uSrc-u2 ))
10691 // tgtNode is located so that it does not make faces with wrong orientation
10692 edge.Set( _LayerEdge::SHRUNK );
10695 //edge._pos.resize(1);
10696 edge._pos[0].SetCoord( U_TGT, uTgt );
10697 edge._pos[0].SetCoord( U_SRC, uSrc );
10698 edge._pos[0].SetCoord( LEN_TGT, fabs( uSrc-uTgt ));
10700 edge._simplices.resize( 1 );
10701 edge._simplices[0]._nPrev = n2;
10703 // set U of source node to the target node
10704 SMDS_EdgePosition* pos = static_cast<SMDS_EdgePosition*>( tgtNode->GetPosition() );
10705 pos->SetUParameter( uSrc );
10710 //================================================================================
10712 * \brief Restore position of a sole node of a _LayerEdge based on _noShrinkShapes
10714 //================================================================================
10716 void _ViscousBuilder::restoreNoShrink( _LayerEdge& edge ) const
10718 if ( edge._nodes.size() == 1 )
10723 const SMDS_MeshNode* srcNode = edge._nodes[0];
10724 TopoDS_Shape S = SMESH_MesherHelper::GetSubShapeByNode( srcNode, getMeshDS() );
10725 if ( S.IsNull() ) return;
10729 switch ( S.ShapeType() )
10734 TopLoc_Location loc;
10735 Handle(Geom_Curve) curve = BRep_Tool::Curve( TopoDS::Edge( S ), loc, f, l );
10736 if ( curve.IsNull() ) return;
10737 SMDS_EdgePosition* ePos = static_cast<SMDS_EdgePosition*>( srcNode->GetPosition() );
10738 p = curve->Value( ePos->GetUParameter() );
10741 case TopAbs_VERTEX:
10743 p = BRep_Tool::Pnt( TopoDS::Vertex( S ));
10748 getMeshDS()->MoveNode( srcNode, p.X(), p.Y(), p.Z() );
10749 dumpMove( srcNode );
10753 //================================================================================
10755 * \brief Try to fix triangles with high aspect ratio by swaping diagonals
10757 //================================================================================
10759 void _ViscousBuilder::fixBadFaces(const TopoDS_Face& F,
10760 SMESH_MesherHelper& helper,
10763 set<const SMDS_MeshNode*> * involvedNodes)
10765 SMESH::Controls::AspectRatio qualifier;
10766 SMESH::Controls::TSequenceOfXYZ points(3), points1(3), points2(3);
10767 const double maxAspectRatio = is2D ? 4. : 2;
10768 _NodeCoordHelper xyz( F, helper, is2D );
10770 // find bad triangles
10772 vector< const SMDS_MeshElement* > badTrias;
10773 vector< double > badAspects;
10774 SMESHDS_SubMesh* sm = helper.GetMeshDS()->MeshElements( F );
10775 SMDS_ElemIteratorPtr fIt = sm->GetElements();
10776 while ( fIt->more() )
10778 const SMDS_MeshElement * f = fIt->next();
10779 if ( f->NbCornerNodes() != 3 ) continue;
10780 for ( int iP = 0; iP < 3; ++iP ) points(iP+1) = xyz( f->GetNode(iP));
10781 double aspect = qualifier.GetValue( points );
10782 if ( aspect > maxAspectRatio )
10784 badTrias.push_back( f );
10785 badAspects.push_back( aspect );
10790 dumpFunction(SMESH_Comment("beforeSwapDiagonals_F")<<helper.GetSubShapeID());
10791 SMDS_ElemIteratorPtr fIt = sm->GetElements();
10792 while ( fIt->more() )
10794 const SMDS_MeshElement * f = fIt->next();
10795 if ( f->NbCornerNodes() == 3 )
10796 dumpChangeNodes( f );
10800 if ( badTrias.empty() )
10803 // find couples of faces to swap diagonal
10805 typedef pair < const SMDS_MeshElement* , const SMDS_MeshElement* > T2Trias;
10806 vector< T2Trias > triaCouples;
10808 TIDSortedElemSet involvedFaces, emptySet;
10809 for ( size_t iTia = 0; iTia < badTrias.size(); ++iTia )
10812 double aspRatio [3];
10815 if ( !involvedFaces.insert( badTrias[iTia] ).second )
10817 for ( int iP = 0; iP < 3; ++iP )
10818 points(iP+1) = xyz( badTrias[iTia]->GetNode(iP));
10820 // find triangles adjacent to badTrias[iTia] with better aspect ratio after diag-swaping
10821 int bestCouple = -1;
10822 for ( int iSide = 0; iSide < 3; ++iSide )
10824 const SMDS_MeshNode* n1 = badTrias[iTia]->GetNode( iSide );
10825 const SMDS_MeshNode* n2 = badTrias[iTia]->GetNode(( iSide+1 ) % 3 );
10826 trias [iSide].first = badTrias[iTia];
10827 trias [iSide].second = SMESH_MeshAlgos::FindFaceInSet( n1, n2, emptySet, involvedFaces,
10829 if (( ! trias[iSide].second ) ||
10830 ( trias[iSide].second->NbCornerNodes() != 3 ) ||
10831 ( ! sm->Contains( trias[iSide].second )))
10834 // aspect ratio of an adjacent tria
10835 for ( int iP = 0; iP < 3; ++iP )
10836 points2(iP+1) = xyz( trias[iSide].second->GetNode(iP));
10837 double aspectInit = qualifier.GetValue( points2 );
10839 // arrange nodes as after diag-swaping
10840 if ( helper.WrapIndex( i1+1, 3 ) == i2 )
10841 i3 = helper.WrapIndex( i1-1, 3 );
10843 i3 = helper.WrapIndex( i1+1, 3 );
10845 points1( 1+ iSide ) = points2( 1+ i3 );
10846 points2( 1+ i2 ) = points1( 1+ ( iSide+2 ) % 3 );
10848 // aspect ratio after diag-swaping
10849 aspRatio[ iSide ] = qualifier.GetValue( points1 ) + qualifier.GetValue( points2 );
10850 if ( aspRatio[ iSide ] > aspectInit + badAspects[ iTia ] )
10853 // prevent inversion of a triangle
10854 gp_Vec norm1 = gp_Vec( points1(1), points1(3) ) ^ gp_Vec( points1(1), points1(2) );
10855 gp_Vec norm2 = gp_Vec( points2(1), points2(3) ) ^ gp_Vec( points2(1), points2(2) );
10856 if ( norm1 * norm2 < 0. && norm1.Angle( norm2 ) > 70./180.*M_PI )
10859 if ( bestCouple < 0 || aspRatio[ bestCouple ] > aspRatio[ iSide ] )
10860 bestCouple = iSide;
10863 if ( bestCouple >= 0 )
10865 triaCouples.push_back( trias[bestCouple] );
10866 involvedFaces.insert ( trias[bestCouple].second );
10870 involvedFaces.erase( badTrias[iTia] );
10873 if ( triaCouples.empty() )
10878 SMESH_MeshEditor editor( helper.GetMesh() );
10879 dumpFunction(SMESH_Comment("beforeSwapDiagonals_F")<<helper.GetSubShapeID()<<"_"<<step);
10880 for ( size_t i = 0; i < triaCouples.size(); ++i )
10882 dumpChangeNodes( triaCouples[i].first );
10883 dumpChangeNodes( triaCouples[i].second );
10884 editor.InverseDiag( triaCouples[i].first, triaCouples[i].second );
10887 if ( involvedNodes )
10888 for ( size_t i = 0; i < triaCouples.size(); ++i )
10890 involvedNodes->insert( triaCouples[i].first->begin_nodes(),
10891 triaCouples[i].first->end_nodes() );
10892 involvedNodes->insert( triaCouples[i].second->begin_nodes(),
10893 triaCouples[i].second->end_nodes() );
10896 // just for debug dump resulting triangles
10897 dumpFunction(SMESH_Comment("swapDiagonals_F")<<helper.GetSubShapeID()<<"_"<<step);
10898 for ( size_t i = 0; i < triaCouples.size(); ++i )
10900 dumpChangeNodes( triaCouples[i].first );
10901 dumpChangeNodes( triaCouples[i].second );
10905 //================================================================================
10907 * \brief Move target node to it's final position on the FACE during shrinking
10909 //================================================================================
10911 bool _LayerEdge::SetNewLength2d( Handle(Geom_Surface)& surface,
10912 const TopoDS_Face& F,
10913 _EdgesOnShape& eos,
10914 SMESH_MesherHelper& helper )
10917 return false; // already at the target position
10919 SMDS_MeshNode* tgtNode = const_cast< SMDS_MeshNode*& >( _nodes.back() );
10921 if ( eos.SWOLType() == TopAbs_FACE )
10923 gp_XY curUV = helper.GetNodeUV( F, tgtNode );
10924 gp_Pnt2d tgtUV( _pos[0].X(), _pos[0].Y() );
10925 gp_Vec2d uvDir( _normal.X(), _normal.Y() );
10926 const double uvLen = tgtUV.Distance( curUV );
10927 const double kSafe = Max( 0.5, 1. - 0.1 * _simplices.size() );
10929 // Select shrinking step such that not to make faces with wrong orientation.
10930 double stepSize = 1e100;
10931 for ( size_t i = 0; i < _simplices.size(); ++i )
10933 if ( !_simplices[i]._nPrev->isMarked() ||
10934 !_simplices[i]._nNext->isMarked() )
10935 continue; // simplex of quadrangle created by addBoundaryElements()
10937 // find intersection of 2 lines: curUV-tgtUV and that connecting simplex nodes
10938 gp_XY uvN1 = helper.GetNodeUV( F, _simplices[i]._nPrev );
10939 gp_XY uvN2 = helper.GetNodeUV( F, _simplices[i]._nNext );
10940 gp_XY dirN = uvN2 - uvN1;
10941 double det = uvDir.Crossed( dirN );
10942 if ( Abs( det ) < std::numeric_limits<double>::min() ) continue;
10943 gp_XY dirN2Cur = curUV - uvN1;
10944 double step = dirN.Crossed( dirN2Cur ) / det;
10946 stepSize = Min( step, stepSize );
10949 if ( uvLen <= stepSize )
10955 else if ( stepSize > 0 )
10957 newUV = curUV + uvDir.XY() * stepSize * kSafe;
10963 SMDS_FacePosition* pos = static_cast<SMDS_FacePosition*>( tgtNode->GetPosition() );
10964 pos->SetUParameter( newUV.X() );
10965 pos->SetVParameter( newUV.Y() );
10968 gp_Pnt p = surface->Value( newUV.X(), newUV.Y() );
10969 tgtNode->setXYZ( p.X(), p.Y(), p.Z() );
10970 dumpMove( tgtNode );
10973 else // _sWOL is TopAbs_EDGE
10975 const TopoDS_Edge& E = TopoDS::Edge( eos._sWOL );
10976 const SMDS_MeshNode* n2 = _simplices[0]._nPrev;
10977 SMDS_EdgePosition* tgtPos = static_cast<SMDS_EdgePosition*>( tgtNode->GetPosition() );
10979 const double u2 = helper.GetNodeU( E, n2, tgtNode );
10980 const double uSrc = _pos[0].Coord( U_SRC );
10981 const double lenTgt = _pos[0].Coord( LEN_TGT );
10983 double newU = _pos[0].Coord( U_TGT );
10984 if ( lenTgt < 0.99 * fabs( uSrc-u2 )) // n2 got out of src-tgt range
10986 Set( _LayerEdge::SHRUNK );
10991 newU = 0.1 * tgtPos->GetUParameter() + 0.9 * u2;
10993 tgtPos->SetUParameter( newU );
10995 gp_XY newUV = helper.GetNodeUV( F, tgtNode, _nodes[0]);
10996 gp_Pnt p = surface->Value( newUV.X(), newUV.Y() );
10997 tgtNode->setXYZ( p.X(), p.Y(), p.Z() );
10998 dumpMove( tgtNode );
11005 //================================================================================
11007 * \brief Perform smooth on the FACE
11008 * \retval bool - true if the node has been moved
11010 //================================================================================
11012 bool _SmoothNode::Smooth(int& nbBad,
11013 Handle(Geom_Surface)& surface,
11014 SMESH_MesherHelper& helper,
11015 const double refSign,
11019 const TopoDS_Face& face = TopoDS::Face( helper.GetSubShape() );
11021 // get uv of surrounding nodes
11022 vector<gp_XY> uv( _simplices.size() );
11023 for ( size_t i = 0; i < _simplices.size(); ++i )
11024 uv[i] = helper.GetNodeUV( face, _simplices[i]._nPrev, _node );
11026 // compute new UV for the node
11027 gp_XY newPos (0,0);
11028 if ( how == TFI && _simplices.size() == 4 )
11031 for ( size_t i = 0; i < _simplices.size(); ++i )
11032 if ( _simplices[i]._nOpp )
11033 corners[i] = helper.GetNodeUV( face, _simplices[i]._nOpp, _node );
11035 throw SALOME_Exception(LOCALIZED("TFI smoothing: _Simplex::_nOpp not set!"));
11037 newPos = helper.calcTFI ( 0.5, 0.5,
11038 corners[0], corners[1], corners[2], corners[3],
11039 uv[1], uv[2], uv[3], uv[0] );
11041 else if ( how == ANGULAR )
11043 newPos = computeAngularPos( uv, helper.GetNodeUV( face, _node ), refSign );
11045 else if ( how == CENTROIDAL && _simplices.size() > 3 )
11047 // average centers of diagonals wieghted with their reciprocal lengths
11048 if ( _simplices.size() == 4 )
11050 double w1 = 1. / ( uv[2]-uv[0] ).SquareModulus();
11051 double w2 = 1. / ( uv[3]-uv[1] ).SquareModulus();
11052 newPos = ( w1 * ( uv[2]+uv[0] ) + w2 * ( uv[3]+uv[1] )) / ( w1+w2 ) / 2;
11056 double sumWeight = 0;
11057 int nb = _simplices.size() == 4 ? 2 : _simplices.size();
11058 for ( int i = 0; i < nb; ++i )
11061 int iTo = i + _simplices.size() - 1;
11062 for ( int j = iFrom; j < iTo; ++j )
11064 int i2 = SMESH_MesherHelper::WrapIndex( j, _simplices.size() );
11065 double w = 1. / ( uv[i]-uv[i2] ).SquareModulus();
11067 newPos += w * ( uv[i]+uv[i2] );
11070 newPos /= 2 * sumWeight; // 2 is to get a middle between uv's
11075 // Laplacian smooth
11076 for ( size_t i = 0; i < _simplices.size(); ++i )
11078 newPos /= _simplices.size();
11081 // count quality metrics (orientation) of triangles around the node
11082 int nbOkBefore = 0;
11083 gp_XY tgtUV = helper.GetNodeUV( face, _node );
11084 for ( size_t i = 0; i < _simplices.size(); ++i )
11085 nbOkBefore += _simplices[i].IsForward( tgtUV, _node, face, helper, refSign );
11088 for ( size_t i = 0; i < _simplices.size(); ++i )
11089 nbOkAfter += _simplices[i].IsForward( newPos, _node, face, helper, refSign );
11091 if ( nbOkAfter < nbOkBefore )
11093 nbBad += _simplices.size() - nbOkBefore;
11097 SMDS_FacePosition* pos = static_cast<SMDS_FacePosition*>( _node->GetPosition() );
11098 pos->SetUParameter( newPos.X() );
11099 pos->SetVParameter( newPos.Y() );
11106 gp_Pnt p = surface->Value( newPos.X(), newPos.Y() );
11107 const_cast< SMDS_MeshNode* >( _node )->setXYZ( p.X(), p.Y(), p.Z() );
11111 nbBad += _simplices.size() - nbOkAfter;
11112 return ( (tgtUV-newPos).SquareModulus() > 1e-10 );
11115 //================================================================================
11117 * \brief Computes new UV using angle based smoothing technic
11119 //================================================================================
11121 gp_XY _SmoothNode::computeAngularPos(vector<gp_XY>& uv,
11122 const gp_XY& uvToFix,
11123 const double refSign)
11125 uv.push_back( uv.front() );
11127 vector< gp_XY > edgeDir ( uv.size() );
11128 vector< double > edgeSize( uv.size() );
11129 for ( size_t i = 1; i < edgeDir.size(); ++i )
11131 edgeDir [i-1] = uv[i] - uv[i-1];
11132 edgeSize[i-1] = edgeDir[i-1].Modulus();
11133 if ( edgeSize[i-1] < numeric_limits<double>::min() )
11134 edgeDir[i-1].SetX( 100 );
11136 edgeDir[i-1] /= edgeSize[i-1] * refSign;
11138 edgeDir.back() = edgeDir.front();
11139 edgeSize.back() = edgeSize.front();
11143 double sumSize = 0;
11144 for ( size_t i = 1; i < edgeDir.size(); ++i )
11146 if ( edgeDir[i-1].X() > 1. ) continue;
11148 while ( edgeDir[i].X() > 1. && ++i < edgeDir.size() );
11149 if ( i == edgeDir.size() ) break;
11151 gp_XY norm1( -edgeDir[i1].Y(), edgeDir[i1].X() );
11152 gp_XY norm2( -edgeDir[i].Y(), edgeDir[i].X() );
11153 gp_XY bisec = norm1 + norm2;
11154 double bisecSize = bisec.Modulus();
11155 if ( bisecSize < numeric_limits<double>::min() )
11157 bisec = -edgeDir[i1] + edgeDir[i];
11158 bisecSize = bisec.Modulus();
11160 bisec /= bisecSize;
11162 gp_XY dirToN = uvToFix - p;
11163 double distToN = dirToN.Modulus();
11164 if ( bisec * dirToN < 0 )
11165 distToN = -distToN;
11167 newPos += ( p + bisec * distToN ) * ( edgeSize[i1] + edgeSize[i] );
11169 sumSize += edgeSize[i1] + edgeSize[i];
11171 newPos /= /*nbEdges * */sumSize;
11175 //================================================================================
11177 * \brief Delete _SolidData
11179 //================================================================================
11181 _SolidData::~_SolidData()
11183 TNode2Edge::iterator n2e = _n2eMap.begin();
11184 for ( ; n2e != _n2eMap.end(); ++n2e )
11186 _LayerEdge* & e = n2e->second;
11189 delete e->_curvature;
11190 if ( e->_2neibors )
11191 delete e->_2neibors->_plnNorm;
11192 delete e->_2neibors;
11203 //================================================================================
11205 * \brief Keep a _LayerEdge inflated along the EDGE
11207 //================================================================================
11209 void _Shrinker1D::AddEdge( const _LayerEdge* e,
11210 _EdgesOnShape& eos,
11211 SMESH_MesherHelper& helper )
11214 if ( _nodes.empty() )
11216 _edges[0] = _edges[1] = 0;
11219 // check _LayerEdge
11220 if ( e == _edges[0] || e == _edges[1] || e->_nodes.size() < 2 )
11222 if ( eos.SWOLType() != TopAbs_EDGE )
11223 throw SALOME_Exception(LOCALIZED("Wrong _LayerEdge is added"));
11224 if ( _edges[0] && !_geomEdge.IsSame( eos._sWOL ))
11225 throw SALOME_Exception(LOCALIZED("Wrong _LayerEdge is added"));
11227 // store _LayerEdge
11228 _geomEdge = TopoDS::Edge( eos._sWOL );
11230 BRep_Tool::Range( _geomEdge, f,l );
11231 double u = helper.GetNodeU( _geomEdge, e->_nodes[0], e->_nodes.back());
11232 _edges[ u < 0.5*(f+l) ? 0 : 1 ] = e;
11236 const SMDS_MeshNode* tgtNode0 = TgtNode( 0 );
11237 const SMDS_MeshNode* tgtNode1 = TgtNode( 1 );
11239 if ( _nodes.empty() )
11241 SMESHDS_SubMesh * eSubMesh = helper.GetMeshDS()->MeshElements( _geomEdge );
11242 if ( !eSubMesh || eSubMesh->NbNodes() < 1 )
11244 TopLoc_Location loc;
11245 Handle(Geom_Curve) C = BRep_Tool::Curve( _geomEdge, loc, f,l );
11246 GeomAdaptor_Curve aCurve(C, f,l);
11247 const double totLen = GCPnts_AbscissaPoint::Length(aCurve, f, l);
11249 int nbExpectNodes = eSubMesh->NbNodes();
11250 _initU .reserve( nbExpectNodes );
11251 _normPar.reserve( nbExpectNodes );
11252 _nodes .reserve( nbExpectNodes );
11253 SMDS_NodeIteratorPtr nIt = eSubMesh->GetNodes();
11254 while ( nIt->more() )
11256 const SMDS_MeshNode* node = nIt->next();
11258 // skip refinement nodes
11259 if ( node->NbInverseElements(SMDSAbs_Edge) == 0 ||
11260 node == tgtNode0 || node == tgtNode1 )
11262 bool hasMarkedFace = false;
11263 SMDS_ElemIteratorPtr fIt = node->GetInverseElementIterator(SMDSAbs_Face);
11264 while ( fIt->more() && !hasMarkedFace )
11265 hasMarkedFace = fIt->next()->isMarked();
11266 if ( !hasMarkedFace )
11269 _nodes.push_back( node );
11270 _initU.push_back( helper.GetNodeU( _geomEdge, node ));
11271 double len = GCPnts_AbscissaPoint::Length(aCurve, f, _initU.back());
11272 _normPar.push_back( len / totLen );
11277 // remove target node of the _LayerEdge from _nodes
11278 size_t nbFound = 0;
11279 for ( size_t i = 0; i < _nodes.size(); ++i )
11280 if ( !_nodes[i] || _nodes[i] == tgtNode0 || _nodes[i] == tgtNode1 )
11281 _nodes[i] = 0, nbFound++;
11282 if ( nbFound == _nodes.size() )
11287 //================================================================================
11289 * \brief Move nodes on EDGE from ends where _LayerEdge's are inflated
11291 //================================================================================
11293 void _Shrinker1D::Compute(bool set3D, SMESH_MesherHelper& helper)
11295 if ( _done || _nodes.empty())
11297 const _LayerEdge* e = _edges[0];
11298 if ( !e ) e = _edges[1];
11301 _done = (( !_edges[0] || _edges[0]->Is( _LayerEdge::SHRUNK )) &&
11302 ( !_edges[1] || _edges[1]->Is( _LayerEdge::SHRUNK )));
11305 if ( set3D || _done )
11307 Handle(Geom_Curve) C = BRep_Tool::Curve(_geomEdge, f,l);
11308 GeomAdaptor_Curve aCurve(C, f,l);
11311 f = helper.GetNodeU( _geomEdge, _edges[0]->_nodes.back(), _nodes[0] );
11313 l = helper.GetNodeU( _geomEdge, _edges[1]->_nodes.back(), _nodes.back() );
11314 double totLen = GCPnts_AbscissaPoint::Length( aCurve, f, l );
11316 for ( size_t i = 0; i < _nodes.size(); ++i )
11318 if ( !_nodes[i] ) continue;
11319 double len = totLen * _normPar[i];
11320 GCPnts_AbscissaPoint discret( aCurve, len, f );
11321 if ( !discret.IsDone() )
11322 return throw SALOME_Exception(LOCALIZED("GCPnts_AbscissaPoint failed"));
11323 double u = discret.Parameter();
11324 SMDS_EdgePosition* pos = static_cast<SMDS_EdgePosition*>( _nodes[i]->GetPosition() );
11325 pos->SetUParameter( u );
11326 gp_Pnt p = C->Value( u );
11327 const_cast< SMDS_MeshNode*>( _nodes[i] )->setXYZ( p.X(), p.Y(), p.Z() );
11332 BRep_Tool::Range( _geomEdge, f,l );
11334 f = helper.GetNodeU( _geomEdge, _edges[0]->_nodes.back(), _nodes[0] );
11336 l = helper.GetNodeU( _geomEdge, _edges[1]->_nodes.back(), _nodes.back() );
11338 for ( size_t i = 0; i < _nodes.size(); ++i )
11340 if ( !_nodes[i] ) continue;
11341 double u = f * ( 1-_normPar[i] ) + l * _normPar[i];
11342 SMDS_EdgePosition* pos = static_cast<SMDS_EdgePosition*>( _nodes[i]->GetPosition() );
11343 pos->SetUParameter( u );
11348 //================================================================================
11350 * \brief Restore initial parameters of nodes on EDGE
11352 //================================================================================
11354 void _Shrinker1D::RestoreParams()
11357 for ( size_t i = 0; i < _nodes.size(); ++i )
11359 if ( !_nodes[i] ) continue;
11360 SMDS_EdgePosition* pos = static_cast<SMDS_EdgePosition*>( _nodes[i]->GetPosition() );
11361 pos->SetUParameter( _initU[i] );
11366 //================================================================================
11368 * \brief Replace source nodes by target nodes in shrinked mesh edges
11370 //================================================================================
11372 void _Shrinker1D::SwapSrcTgtNodes( SMESHDS_Mesh* mesh )
11374 const SMDS_MeshNode* nodes[3];
11375 for ( int i = 0; i < 2; ++i )
11377 if ( !_edges[i] ) continue;
11379 SMESHDS_SubMesh * eSubMesh = mesh->MeshElements( _geomEdge );
11380 if ( !eSubMesh ) return;
11381 const SMDS_MeshNode* srcNode = _edges[i]->_nodes[0];
11382 const SMDS_MeshNode* tgtNode = _edges[i]->_nodes.back();
11383 const SMDS_MeshNode* scdNode = _edges[i]->_nodes[1];
11384 SMDS_ElemIteratorPtr eIt = srcNode->GetInverseElementIterator(SMDSAbs_Edge);
11385 while ( eIt->more() )
11387 const SMDS_MeshElement* e = eIt->next();
11388 if ( !eSubMesh->Contains( e ) || e->GetNodeIndex( scdNode ) >= 0 )
11390 SMDS_ElemIteratorPtr nIt = e->nodesIterator();
11391 for ( int iN = 0; iN < e->NbNodes(); ++iN )
11393 const SMDS_MeshNode* n = static_cast<const SMDS_MeshNode*>( nIt->next() );
11394 nodes[iN] = ( n == srcNode ? tgtNode : n );
11396 mesh->ChangeElementNodes( e, nodes, e->NbNodes() );
11401 //================================================================================
11403 * \brief Creates 2D and 1D elements on boundaries of new prisms
11405 //================================================================================
11407 bool _ViscousBuilder::addBoundaryElements(_SolidData& data)
11409 SMESH_MesherHelper helper( *_mesh );
11411 vector< const SMDS_MeshNode* > faceNodes;
11413 //for ( size_t i = 0; i < _sdVec.size(); ++i )
11415 //_SolidData& data = _sdVec[i];
11416 TopTools_IndexedMapOfShape geomEdges;
11417 TopExp::MapShapes( data._solid, TopAbs_EDGE, geomEdges );
11418 for ( int iE = 1; iE <= geomEdges.Extent(); ++iE )
11420 const TopoDS_Edge& E = TopoDS::Edge( geomEdges(iE));
11421 const TGeomID edgeID = getMeshDS()->ShapeToIndex( E );
11422 if ( data._noShrinkShapes.count( edgeID ))
11425 // Get _LayerEdge's based on E
11427 map< double, const SMDS_MeshNode* > u2nodes;
11428 if ( !SMESH_Algo::GetSortedNodesOnEdge( getMeshDS(), E, /*ignoreMedium=*/false, u2nodes))
11431 vector< _LayerEdge* > ledges; ledges.reserve( u2nodes.size() );
11432 TNode2Edge & n2eMap = data._n2eMap;
11433 map< double, const SMDS_MeshNode* >::iterator u2n = u2nodes.begin();
11435 //check if 2D elements are needed on E
11436 TNode2Edge::iterator n2e = n2eMap.find( u2n->second );
11437 if ( n2e == n2eMap.end() ) continue; // no layers on vertex
11438 ledges.push_back( n2e->second );
11440 if (( n2e = n2eMap.find( u2n->second )) == n2eMap.end() )
11441 continue; // no layers on E
11442 ledges.push_back( n2eMap[ u2n->second ]);
11444 const SMDS_MeshNode* tgtN0 = ledges[0]->_nodes.back();
11445 const SMDS_MeshNode* tgtN1 = ledges[1]->_nodes.back();
11446 int nbSharedPyram = 0;
11447 SMDS_ElemIteratorPtr vIt = tgtN0->GetInverseElementIterator(SMDSAbs_Volume);
11448 while ( vIt->more() )
11450 const SMDS_MeshElement* v = vIt->next();
11451 nbSharedPyram += int( v->GetNodeIndex( tgtN1 ) >= 0 );
11453 if ( nbSharedPyram > 1 )
11454 continue; // not free border of the pyramid
11457 faceNodes.push_back( ledges[0]->_nodes[0] );
11458 faceNodes.push_back( ledges[1]->_nodes[0] );
11459 if ( ledges[0]->_nodes.size() > 1 ) faceNodes.push_back( ledges[0]->_nodes[1] );
11460 if ( ledges[1]->_nodes.size() > 1 ) faceNodes.push_back( ledges[1]->_nodes[1] );
11462 if ( getMeshDS()->FindElement( faceNodes, SMDSAbs_Face, /*noMedium=*/true))
11463 continue; // faces already created
11465 for ( ++u2n; u2n != u2nodes.end(); ++u2n )
11466 ledges.push_back( n2eMap[ u2n->second ]);
11468 // Find out orientation and type of face to create
11470 bool reverse = false, isOnFace;
11473 map< TGeomID, TopoDS_Shape >::iterator e2f = data._shrinkShape2Shape.find( edgeID );
11474 if (( isOnFace = ( e2f != data._shrinkShape2Shape.end() )))
11476 F = e2f->second.Oriented( TopAbs_FORWARD );
11477 reverse = ( helper.GetSubShapeOri( F, E ) == TopAbs_REVERSED );
11478 if ( helper.GetSubShapeOri( data._solid, F ) == TopAbs_REVERSED )
11479 reverse = !reverse, F.Reverse();
11480 if ( helper.IsReversedSubMesh( TopoDS::Face(F) ))
11481 reverse = !reverse;
11483 else if ( !data._ignoreFaceIds.count( e2f->first ))
11485 // find FACE with layers sharing E
11486 PShapeIteratorPtr fIt = helper.GetAncestors( E, *_mesh, TopAbs_FACE, &data._solid );
11488 F = *( fIt->next() );
11490 // Find the sub-mesh to add new faces
11491 SMESHDS_SubMesh* sm = 0;
11493 sm = getMeshDS()->MeshElements( F );
11495 sm = data._proxyMesh->getFaceSubM( TopoDS::Face(F), /*create=*/true );
11497 return error("error in addBoundaryElements()", data._index);
11499 // Find a proxy sub-mesh of the FACE of an adjacent SOLID, which will use the new boundary
11500 // faces for 3D meshing (PAL23414)
11501 SMESHDS_SubMesh* adjSM = 0;
11504 const TGeomID faceID = sm->GetID();
11505 PShapeIteratorPtr soIt = helper.GetAncestors( F, *_mesh, TopAbs_SOLID );
11506 while ( const TopoDS_Shape* solid = soIt->next() )
11507 if ( !solid->IsSame( data._solid ))
11509 size_t iData = _solids.FindIndex( *solid ) - 1;
11510 if ( iData < _sdVec.size() &&
11511 _sdVec[ iData ]._ignoreFaceIds.count( faceID ) &&
11512 _sdVec[ iData ]._shrinkShape2Shape.count( edgeID ) == 0 )
11514 SMESH_ProxyMesh::SubMesh* proxySub =
11515 _sdVec[ iData ]._proxyMesh->getFaceSubM( TopoDS::Face( F ), /*create=*/false);
11516 if ( proxySub && proxySub->NbElements() > 0 )
11523 const int dj1 = reverse ? 0 : 1;
11524 const int dj2 = reverse ? 1 : 0;
11525 vector< const SMDS_MeshElement*> ff; // new faces row
11526 SMESHDS_Mesh* m = getMeshDS();
11527 for ( size_t j = 1; j < ledges.size(); ++j )
11529 vector< const SMDS_MeshNode*>& nn1 = ledges[j-dj1]->_nodes;
11530 vector< const SMDS_MeshNode*>& nn2 = ledges[j-dj2]->_nodes;
11531 ff.resize( std::max( nn1.size(), nn2.size() ), NULL );
11532 if ( nn1.size() == nn2.size() )
11535 for ( size_t z = 1; z < nn1.size(); ++z )
11536 sm->AddElement( ff[z-1] = m->AddFace( nn1[z-1], nn2[z-1], nn2[z], nn1[z] ));
11538 for ( size_t z = 1; z < nn1.size(); ++z )
11539 sm->AddElement( new SMDS_FaceOfNodes( nn1[z-1], nn2[z-1], nn2[z], nn1[z] ));
11541 else if ( nn1.size() == 1 )
11544 for ( size_t z = 1; z < nn2.size(); ++z )
11545 sm->AddElement( ff[z-1] = m->AddFace( nn1[0], nn2[z-1], nn2[z] ));
11547 for ( size_t z = 1; z < nn2.size(); ++z )
11548 sm->AddElement( new SMDS_FaceOfNodes( nn1[0], nn2[z-1], nn2[z] ));
11553 for ( size_t z = 1; z < nn1.size(); ++z )
11554 sm->AddElement( ff[z-1] = m->AddFace( nn1[z-1], nn2[0], nn1[z] ));
11556 for ( size_t z = 1; z < nn1.size(); ++z )
11557 sm->AddElement( new SMDS_FaceOfNodes( nn1[z-1], nn2[0], nn2[z] ));
11560 if ( adjSM ) // add faces to a proxy SM of the adjacent SOLID
11562 for ( size_t z = 0; z < ff.size(); ++z )
11564 adjSM->AddElement( ff[ z ]);
11570 for ( int isFirst = 0; isFirst < 2; ++isFirst )
11572 _LayerEdge* edge = isFirst ? ledges.front() : ledges.back();
11573 _EdgesOnShape* eos = data.GetShapeEdges( edge );
11574 if ( eos && eos->SWOLType() == TopAbs_EDGE )
11576 vector< const SMDS_MeshNode*>& nn = edge->_nodes;
11577 if ( nn.size() < 2 || nn[1]->NbInverseElements( SMDSAbs_Edge ) >= 2 )
11579 helper.SetSubShape( eos->_sWOL );
11580 helper.SetElementsOnShape( true );
11581 for ( size_t z = 1; z < nn.size(); ++z )
11582 helper.AddEdge( nn[z-1], nn[z] );
11586 } // loop on EDGE's
11587 } // loop on _SolidData's