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 this->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 MARKED = 0x0000100, // local usage
437 MULTI_NORMAL = 0x0000200, // a normal is invisible by some of surrounding faces
438 NEAR_BOUNDARY = 0x0000400, // is near FACE boundary forcing smooth
439 SMOOTHED_C1 = 0x0000800, // is on _eosC1
440 DISTORTED = 0x0001000, // was bad before smoothing
441 RISKY_SWOL = 0x0002000, // SWOL is parallel to a source FACE
442 SHRUNK = 0x0004000, // target node reached a tgt position while shrink()
443 UNUSED_FLAG = 0x0100000 // to add use flags after
445 bool Is ( int flag ) const { return _flags & flag; }
446 void Set ( int flag ) { _flags |= flag; }
447 void Unset( int flag ) { _flags &= ~flag; }
448 std::string DumpFlags() const; // debug
450 void SetNewLength( double len, _EdgesOnShape& eos, SMESH_MesherHelper& helper );
451 bool SetNewLength2d( Handle(Geom_Surface)& surface,
452 const TopoDS_Face& F,
454 SMESH_MesherHelper& helper );
455 void SetDataByNeighbors( const SMDS_MeshNode* n1,
456 const SMDS_MeshNode* n2,
457 const _EdgesOnShape& eos,
458 SMESH_MesherHelper& helper);
459 void Block( _SolidData& data );
460 void InvalidateStep( size_t curStep, const _EdgesOnShape& eos, bool restoreLength=false );
461 void ChooseSmooFunction(const set< TGeomID >& concaveVertices,
462 const TNode2Edge& n2eMap);
463 void SmoothPos( const vector< double >& segLen, const double tol );
464 int GetSmoothedPos( const double tol );
465 int Smooth(const int step, const bool isConcaveFace, bool findBest);
466 int Smooth(const int step, bool findBest, vector< _LayerEdge* >& toSmooth );
467 int CheckNeiborsOnBoundary(vector< _LayerEdge* >* badNeibors = 0, bool * needSmooth = 0 );
468 void SmoothWoCheck();
469 bool SmoothOnEdge(Handle(ShapeAnalysis_Surface)& surface,
470 const TopoDS_Face& F,
471 SMESH_MesherHelper& helper);
472 void MoveNearConcaVer( const _EdgesOnShape* eov,
473 const _EdgesOnShape* eos,
475 vector< _LayerEdge* > & badSmooEdges);
476 bool FindIntersection( SMESH_ElementSearcher& searcher,
478 const double& epsilon,
480 const SMDS_MeshElement** face = 0);
481 bool SegTriaInter( const gp_Ax1& lastSegment,
486 const double& epsilon) const;
487 bool SegTriaInter( const gp_Ax1& lastSegment,
488 const SMDS_MeshNode* n0,
489 const SMDS_MeshNode* n1,
490 const SMDS_MeshNode* n2,
492 const double& epsilon) const
493 { return SegTriaInter( lastSegment,
494 SMESH_TNodeXYZ( n0 ), SMESH_TNodeXYZ( n1 ), SMESH_TNodeXYZ( n2 ),
497 const gp_XYZ& PrevPos() const { return _pos[ _pos.size() - 2 ]; }
498 gp_XYZ PrevCheckPos( _EdgesOnShape* eos=0 ) const;
499 gp_Ax1 LastSegment(double& segLen, _EdgesOnShape& eos) const;
500 gp_XY LastUV( const TopoDS_Face& F, _EdgesOnShape& eos ) const;
501 bool IsOnEdge() const { return _2neibors; }
502 gp_XYZ Copy( _LayerEdge& other, _EdgesOnShape& eos, SMESH_MesherHelper& helper );
503 void SetCosin( double cosin );
504 void SetNormal( const gp_XYZ& n ) { _normal = n; }
505 int NbSteps() const { return _pos.size() - 1; } // nb inlation steps
506 bool IsNeiborOnEdge( const _LayerEdge* edge ) const;
507 void SetSmooLen( double len ) { // set _len at which smoothing is needed
508 _cosin = len; // as for _LayerEdge's on FACE _cosin is not used
510 double GetSmooLen() { return _cosin; } // for _LayerEdge's on FACE _cosin is not used
512 gp_XYZ smoothLaplacian();
513 gp_XYZ smoothAngular();
514 gp_XYZ smoothLengthWeighted();
515 gp_XYZ smoothCentroidal();
516 gp_XYZ smoothNefPolygon();
518 enum { FUN_LAPLACIAN, FUN_LENWEIGHTED, FUN_CENTROIDAL, FUN_NEFPOLY, FUN_ANGULAR, FUN_NB };
519 static const int theNbSmooFuns = FUN_NB;
520 static PSmooFun _funs[theNbSmooFuns];
521 static const char* _funNames[theNbSmooFuns+1];
522 int smooFunID( PSmooFun fun=0) const;
524 _LayerEdge::PSmooFun _LayerEdge::_funs[theNbSmooFuns] = { &_LayerEdge::smoothLaplacian,
525 &_LayerEdge::smoothLengthWeighted,
526 &_LayerEdge::smoothCentroidal,
527 &_LayerEdge::smoothNefPolygon,
528 &_LayerEdge::smoothAngular };
529 const char* _LayerEdge::_funNames[theNbSmooFuns+1] = { "Laplacian",
537 bool operator () (const _LayerEdge* e1, const _LayerEdge* e2) const
539 const bool cmpNodes = ( e1 && e2 && e1->_nodes.size() && e2->_nodes.size() );
540 return cmpNodes ? ( e1->_nodes[0]->GetID() < e2->_nodes[0]->GetID()) : ( e1 < e2 );
543 //--------------------------------------------------------------------------------
545 * A 2D half plane used by _LayerEdge::smoothNefPolygon()
549 gp_XY _pos, _dir, _inNorm;
550 bool IsOut( const gp_XY p, const double tol ) const
552 return _inNorm * ( p - _pos ) < -tol;
554 bool FindIntersection( const _halfPlane& hp, gp_XY & intPnt )
556 //const double eps = 1e-10;
557 double D = _dir.Crossed( hp._dir );
558 if ( fabs(D) < std::numeric_limits<double>::min())
560 gp_XY vec21 = _pos - hp._pos;
561 double u = hp._dir.Crossed( vec21 ) / D;
562 intPnt = _pos + _dir * u;
566 //--------------------------------------------------------------------------------
568 * Structure used to smooth a _LayerEdge based on an EDGE.
572 double _wgt [2]; // weights of _nodes
573 _LayerEdge* _edges[2];
575 // normal to plane passing through _LayerEdge._normal and tangent of EDGE
578 _2NearEdges() { _edges[0]=_edges[1]=0; _plnNorm = 0; }
579 const SMDS_MeshNode* tgtNode(bool is2nd) {
580 return _edges[is2nd] ? _edges[is2nd]->_nodes.back() : 0;
582 const SMDS_MeshNode* srcNode(bool is2nd) {
583 return _edges[is2nd] ? _edges[is2nd]->_nodes[0] : 0;
586 std::swap( _wgt [0], _wgt [1] );
587 std::swap( _edges[0], _edges[1] );
589 void set( _LayerEdge* e1, _LayerEdge* e2, double w1, double w2 ) {
590 _edges[0] = e1; _edges[1] = e2; _wgt[0] = w1; _wgt[1] = w2;
592 bool include( const _LayerEdge* e ) {
593 return ( _edges[0] == e || _edges[1] == e );
598 //--------------------------------------------------------------------------------
600 * \brief Layers parameters got by averaging several hypotheses
604 AverageHyp( const StdMeshers_ViscousLayers* hyp = 0 )
605 :_nbLayers(0), _nbHyps(0), _method(0), _thickness(0), _stretchFactor(0)
609 void Add( const StdMeshers_ViscousLayers* hyp )
614 _nbLayers = hyp->GetNumberLayers();
615 //_thickness += hyp->GetTotalThickness();
616 _thickness = Max( _thickness, hyp->GetTotalThickness() );
617 _stretchFactor += hyp->GetStretchFactor();
618 _method = hyp->GetMethod();
621 double GetTotalThickness() const { return _thickness; /*_nbHyps ? _thickness / _nbHyps : 0;*/ }
622 double GetStretchFactor() const { return _nbHyps ? _stretchFactor / _nbHyps : 0; }
623 int GetNumberLayers() const { return _nbLayers; }
624 int GetMethod() const { return _method; }
626 bool UseSurfaceNormal() const
627 { return _method == StdMeshers_ViscousLayers::SURF_OFFSET_SMOOTH; }
628 bool ToSmooth() const
629 { return _method == StdMeshers_ViscousLayers::SURF_OFFSET_SMOOTH; }
630 bool IsOffsetMethod() const
631 { return _method == StdMeshers_ViscousLayers::FACE_OFFSET; }
634 int _nbLayers, _nbHyps, _method;
635 double _thickness, _stretchFactor;
638 //--------------------------------------------------------------------------------
640 * \brief _LayerEdge's on a shape and other shape data
644 vector< _LayerEdge* > _edges;
648 SMESH_subMesh * _subMesh;
649 // face or edge w/o layer along or near which _edges are inflated
651 bool _isRegularSWOL; // w/o singularities
652 // averaged StdMeshers_ViscousLayers parameters
655 _Smoother1D* _edgeSmoother;
656 vector< _EdgesOnShape* > _eosConcaVer; // edges at concave VERTEXes of a FACE
657 vector< _EdgesOnShape* > _eosC1; // to smooth together several C1 continues shapes
659 vector< gp_XYZ > _faceNormals; // if _shape is FACE
660 vector< _EdgesOnShape* > _faceEOS; // to get _faceNormals of adjacent FACEs
662 Handle(ShapeAnalysis_Surface) _offsetSurf;
663 _LayerEdge* _edgeForOffset;
665 _SolidData* _data; // parent SOLID
667 TopAbs_ShapeEnum ShapeType() const
668 { return _shape.IsNull() ? TopAbs_SHAPE : _shape.ShapeType(); }
669 TopAbs_ShapeEnum SWOLType() const
670 { return _sWOL.IsNull() ? TopAbs_SHAPE : _sWOL.ShapeType(); }
671 bool HasC1( const _EdgesOnShape* other ) const
672 { return std::find( _eosC1.begin(), _eosC1.end(), other ) != _eosC1.end(); }
673 bool GetNormal( const SMDS_MeshElement* face, gp_Vec& norm );
674 _SolidData& GetData() const { return *_data; }
676 _EdgesOnShape(): _shapeID(-1), _subMesh(0), _toSmooth(false), _edgeSmoother(0) {}
679 //--------------------------------------------------------------------------------
681 * \brief Convex FACE whose radius of curvature is less than the thickness of
682 * layers. It is used to detect distortion of prisms based on a convex
683 * FACE and to update normals to enable further increasing the thickness
689 // edges whose _simplices are used to detect prism distortion
690 vector< _LayerEdge* > _simplexTestEdges;
692 // map a sub-shape to _SolidData::_edgesOnShape
693 map< TGeomID, _EdgesOnShape* > _subIdToEOS;
697 bool GetCenterOfCurvature( _LayerEdge* ledge,
698 BRepLProp_SLProps& surfProp,
699 SMESH_MesherHelper& helper,
700 gp_Pnt & center ) const;
701 bool CheckPrisms() const;
704 //--------------------------------------------------------------------------------
706 * \brief Structure holding _LayerEdge's based on EDGEs that will collide
707 * at inflation up to the full thickness. A detected collision
708 * is fixed in updateNormals()
710 struct _CollisionEdges
713 vector< _LayerEdge* > _intEdges; // each pair forms an intersected quadrangle
714 const SMDS_MeshNode* nSrc(int i) const { return _intEdges[i]->_nodes[0]; }
715 const SMDS_MeshNode* nTgt(int i) const { return _intEdges[i]->_nodes.back(); }
718 //--------------------------------------------------------------------------------
720 * \brief Data of a SOLID
724 typedef const StdMeshers_ViscousLayers* THyp;
726 TopTools_MapOfShape _before; // SOLIDs to be computed before _solid
727 TGeomID _index; // SOLID id
728 _MeshOfSolid* _proxyMesh;
730 list< TopoDS_Shape > _hypShapes;
731 map< TGeomID, THyp > _face2hyp; // filled if _hyps.size() > 1
732 set< TGeomID > _reversedFaceIds;
733 set< TGeomID > _ignoreFaceIds; // WOL FACEs and FACEs of other SOLIDs
735 double _stepSize, _stepSizeCoeff, _geomSize;
736 const SMDS_MeshNode* _stepSizeNodes[2];
738 TNode2Edge _n2eMap; // nodes and _LayerEdge's based on them
740 // map to find _n2eMap of another _SolidData by a shrink shape shared by two _SolidData's
741 map< TGeomID, TNode2Edge* > _s2neMap;
742 // _LayerEdge's with underlying shapes
743 vector< _EdgesOnShape > _edgesOnShape;
745 // key: an id of shape (EDGE or VERTEX) shared by a FACE with
746 // layers and a FACE w/o layers
747 // value: the shape (FACE or EDGE) to shrink mesh on.
748 // _LayerEdge's basing on nodes on key shape are inflated along the value shape
749 map< TGeomID, TopoDS_Shape > _shrinkShape2Shape;
751 // Convex FACEs whose radius of curvature is less than the thickness of layers
752 map< TGeomID, _ConvexFace > _convexFaces;
754 // shapes (EDGEs and VERTEXes) srink from which is forbidden due to collisions with
755 // the adjacent SOLID
756 set< TGeomID > _noShrinkShapes;
758 int _nbShapesToSmooth;
760 //map< TGeomID,Handle(Geom_Curve)> _edge2curve;
762 vector< _CollisionEdges > _collisionEdges;
763 set< TGeomID > _concaveFaces;
765 double _maxThickness; // of all _hyps
766 double _minThickness; // of all _hyps
768 double _epsilon; // precision for SegTriaInter()
770 SMESH_MesherHelper* _helper;
772 _SolidData(const TopoDS_Shape& s=TopoDS_Shape(),
774 :_solid(s), _proxyMesh(m), _helper(0) {}
777 void SortOnEdge( const TopoDS_Edge& E, vector< _LayerEdge* >& edges);
778 void Sort2NeiborsOnEdge( vector< _LayerEdge* >& edges );
780 _ConvexFace* GetConvexFace( const TGeomID faceID ) {
781 map< TGeomID, _ConvexFace >::iterator id2face = _convexFaces.find( faceID );
782 return id2face == _convexFaces.end() ? 0 : & id2face->second;
784 _EdgesOnShape* GetShapeEdges(const TGeomID shapeID );
785 _EdgesOnShape* GetShapeEdges(const TopoDS_Shape& shape );
786 _EdgesOnShape* GetShapeEdges(const _LayerEdge* edge )
787 { return GetShapeEdges( edge->_nodes[0]->getshapeId() ); }
789 SMESH_MesherHelper& GetHelper() const { return *_helper; }
791 void UnmarkEdges( int flag = _LayerEdge::MARKED ) {
792 for ( size_t i = 0; i < _edgesOnShape.size(); ++i )
793 for ( size_t j = 0; j < _edgesOnShape[i]._edges.size(); ++j )
794 _edgesOnShape[i]._edges[j]->Unset( flag );
796 void AddShapesToSmooth( const set< _EdgesOnShape* >& shape,
797 const set< _EdgesOnShape* >* edgesNoAnaSmooth=0 );
799 void PrepareEdgesToSmoothOnFace( _EdgesOnShape* eof, bool substituteSrcNodes );
801 //--------------------------------------------------------------------------------
803 * \brief Offset plane used in getNormalByOffset()
809 int _faceIndexNext[2];
810 gp_Lin _lines[2]; // line of intersection with neighbor _OffsetPlane's
813 _isLineOK[0] = _isLineOK[1] = false; _faceIndexNext[0] = _faceIndexNext[1] = -1;
815 void ComputeIntersectionLine( _OffsetPlane& pln,
816 const TopoDS_Edge& E,
817 const TopoDS_Vertex& V );
818 gp_XYZ GetCommonPoint(bool& isFound, const TopoDS_Vertex& V) const;
819 int NbLines() const { return _isLineOK[0] + _isLineOK[1]; }
821 //--------------------------------------------------------------------------------
823 * \brief Container of centers of curvature at nodes on an EDGE bounding _ConvexFace
825 struct _CentralCurveOnEdge
828 vector< gp_Pnt > _curvaCenters;
829 vector< _LayerEdge* > _ledges;
830 vector< gp_XYZ > _normals; // new normal for each of _ledges
831 vector< double > _segLength2;
834 TopoDS_Face _adjFace;
835 bool _adjFaceToSmooth;
837 void Append( const gp_Pnt& center, _LayerEdge* ledge )
839 if ( _curvaCenters.size() > 0 )
840 _segLength2.push_back( center.SquareDistance( _curvaCenters.back() ));
841 _curvaCenters.push_back( center );
842 _ledges.push_back( ledge );
843 _normals.push_back( ledge->_normal );
845 bool FindNewNormal( const gp_Pnt& center, gp_XYZ& newNormal );
846 void SetShapes( const TopoDS_Edge& edge,
847 const _ConvexFace& convFace,
849 SMESH_MesherHelper& helper);
851 //--------------------------------------------------------------------------------
853 * \brief Data of node on a shrinked FACE
857 const SMDS_MeshNode* _node;
858 vector<_Simplex> _simplices; // for quality check
860 enum SmoothType { LAPLACIAN, CENTROIDAL, ANGULAR, TFI };
862 bool Smooth(int& badNb,
863 Handle(Geom_Surface)& surface,
864 SMESH_MesherHelper& helper,
865 const double refSign,
869 gp_XY computeAngularPos(vector<gp_XY>& uv,
870 const gp_XY& uvToFix,
871 const double refSign );
873 //--------------------------------------------------------------------------------
875 * \brief Builder of viscous layers
877 class _ViscousBuilder
882 SMESH_ComputeErrorPtr Compute(SMESH_Mesh& mesh,
883 const TopoDS_Shape& shape);
884 // check validity of hypotheses
885 SMESH_ComputeErrorPtr CheckHypotheses( SMESH_Mesh& mesh,
886 const TopoDS_Shape& shape );
888 // restore event listeners used to clear an inferior dim sub-mesh modified by viscous layers
889 void RestoreListeners();
891 // computes SMESH_ProxyMesh::SubMesh::_n2n;
892 bool MakeN2NMap( _MeshOfSolid* pm );
896 bool findSolidsWithLayers();
897 bool setBefore( _SolidData& solidBefore, _SolidData& solidAfter );
898 bool findFacesWithLayers(const bool onlyWith=false);
899 void getIgnoreFaces(const TopoDS_Shape& solid,
900 const StdMeshers_ViscousLayers* hyp,
901 const TopoDS_Shape& hypShape,
902 set<TGeomID>& ignoreFaces);
903 bool makeLayer(_SolidData& data);
904 void setShapeData( _EdgesOnShape& eos, SMESH_subMesh* sm, _SolidData& data );
905 bool setEdgeData( _LayerEdge& edge, _EdgesOnShape& eos,
906 SMESH_MesherHelper& helper, _SolidData& data);
907 gp_XYZ getFaceNormal(const SMDS_MeshNode* n,
908 const TopoDS_Face& face,
909 SMESH_MesherHelper& helper,
911 bool shiftInside=false);
912 bool getFaceNormalAtSingularity(const gp_XY& uv,
913 const TopoDS_Face& face,
914 SMESH_MesherHelper& helper,
916 gp_XYZ getWeigthedNormal( const _LayerEdge* edge );
917 gp_XYZ getNormalByOffset( _LayerEdge* edge,
918 std::pair< TopoDS_Face, gp_XYZ > fId2Normal[],
920 bool lastNoOffset = false);
921 bool findNeiborsOnEdge(const _LayerEdge* edge,
922 const SMDS_MeshNode*& n1,
923 const SMDS_MeshNode*& n2,
926 void findSimplexTestEdges( _SolidData& data,
927 vector< vector<_LayerEdge*> >& edgesByGeom);
928 void computeGeomSize( _SolidData& data );
929 bool findShapesToSmooth( _SolidData& data);
930 void limitStepSizeByCurvature( _SolidData& data );
931 void limitStepSize( _SolidData& data,
932 const SMDS_MeshElement* face,
933 const _LayerEdge* maxCosinEdge );
934 void limitStepSize( _SolidData& data, const double minSize);
935 bool inflate(_SolidData& data);
936 bool smoothAndCheck(_SolidData& data, const int nbSteps, double & distToIntersection);
937 int invalidateBadSmooth( _SolidData& data,
938 SMESH_MesherHelper& helper,
939 vector< _LayerEdge* >& badSmooEdges,
940 vector< _EdgesOnShape* >& eosC1,
942 void makeOffsetSurface( _EdgesOnShape& eos, SMESH_MesherHelper& );
943 void putOnOffsetSurface( _EdgesOnShape& eos, int infStep,
944 vector< _EdgesOnShape* >& eosC1,
945 int smooStep=0, bool moveAll=false );
946 void findCollisionEdges( _SolidData& data, SMESH_MesherHelper& helper );
947 void limitMaxLenByCurvature( _SolidData& data, SMESH_MesherHelper& helper );
948 void limitMaxLenByCurvature( _LayerEdge* e1, _LayerEdge* e2,
949 _EdgesOnShape& eos1, _EdgesOnShape& eos2,
950 SMESH_MesherHelper& helper );
951 bool updateNormals( _SolidData& data, SMESH_MesherHelper& helper, int stepNb, double stepSize );
952 bool updateNormalsOfConvexFaces( _SolidData& data,
953 SMESH_MesherHelper& helper,
955 void updateNormalsOfC1Vertices( _SolidData& data );
956 bool updateNormalsOfSmoothed( _SolidData& data,
957 SMESH_MesherHelper& helper,
959 const double stepSize );
960 bool isNewNormalOk( _SolidData& data,
962 const gp_XYZ& newNormal);
963 bool refine(_SolidData& data);
964 bool shrink(_SolidData& data);
965 bool prepareEdgeToShrink( _LayerEdge& edge, _EdgesOnShape& eos,
966 SMESH_MesherHelper& helper,
967 const SMESHDS_SubMesh* faceSubMesh );
968 void restoreNoShrink( _LayerEdge& edge ) const;
969 void fixBadFaces(const TopoDS_Face& F,
970 SMESH_MesherHelper& helper,
973 set<const SMDS_MeshNode*> * involvedNodes=NULL);
974 bool addBoundaryElements(_SolidData& data);
976 bool error( const string& text, int solidID=-1 );
977 SMESHDS_Mesh* getMeshDS() const { return _mesh->GetMeshDS(); }
980 void makeGroupOfLE();
983 SMESH_ComputeErrorPtr _error;
985 vector< _SolidData > _sdVec;
986 TopTools_IndexedMapOfShape _solids; // to find _SolidData by a solid
987 TopTools_MapOfShape _shrinkedFaces;
991 //--------------------------------------------------------------------------------
993 * \brief Shrinker of nodes on the EDGE
997 TopoDS_Edge _geomEdge;
998 vector<double> _initU;
999 vector<double> _normPar;
1000 vector<const SMDS_MeshNode*> _nodes;
1001 const _LayerEdge* _edges[2];
1004 void AddEdge( const _LayerEdge* e, _EdgesOnShape& eos, SMESH_MesherHelper& helper );
1005 void Compute(bool set3D, SMESH_MesherHelper& helper);
1006 void RestoreParams();
1007 void SwapSrcTgtNodes(SMESHDS_Mesh* mesh);
1008 const TopoDS_Edge& GeomEdge() const { return _geomEdge; }
1009 const SMDS_MeshNode* TgtNode( bool is2nd ) const
1010 { return _edges[is2nd] ? _edges[is2nd]->_nodes.back() : 0; }
1011 const SMDS_MeshNode* SrcNode( bool is2nd ) const
1012 { return _edges[is2nd] ? _edges[is2nd]->_nodes[0] : 0; }
1014 //--------------------------------------------------------------------------------
1016 * \brief Smoother of _LayerEdge's on EDGE.
1020 struct OffPnt // point of the offsetted EDGE
1022 gp_XYZ _xyz; // coord of a point inflated from EDGE w/o smooth
1023 double _len; // length reached at previous inflation step
1024 double _param; // on EDGE
1025 _2NearEdges _2edges; // 2 neighbor _LayerEdge's
1026 gp_XYZ _edgeDir;// EDGE tangent at _param
1027 double Distance( const OffPnt& p ) const { return ( _xyz - p._xyz ).Modulus(); }
1029 vector< OffPnt > _offPoints;
1030 vector< double > _leParams; // normalized param of _eos._edges on EDGE
1031 Handle(Geom_Curve) _anaCurve; // for analytic smooth
1032 _LayerEdge _leOnV[2]; // _LayerEdge's holding normal to the EDGE at VERTEXes
1033 gp_XYZ _edgeDir[2]; // tangent at VERTEXes
1034 size_t _iSeg[2]; // index of segment where extreme tgt node is projected
1035 _EdgesOnShape& _eos;
1036 double _curveLen; // length of the EDGE
1038 static Handle(Geom_Curve) CurveForSmooth( const TopoDS_Edge& E,
1040 SMESH_MesherHelper& helper);
1042 _Smoother1D( Handle(Geom_Curve) curveForSmooth,
1043 _EdgesOnShape& eos )
1044 : _anaCurve( curveForSmooth ), _eos( eos )
1047 bool Perform(_SolidData& data,
1048 Handle(ShapeAnalysis_Surface)& surface,
1049 const TopoDS_Face& F,
1050 SMESH_MesherHelper& helper )
1052 if ( _leParams.empty() || ( !isAnalytic() && _offPoints.empty() ))
1056 return smoothAnalyticEdge( data, surface, F, helper );
1058 return smoothComplexEdge ( data, surface, F, helper );
1060 void prepare(_SolidData& data );
1062 bool smoothAnalyticEdge( _SolidData& data,
1063 Handle(ShapeAnalysis_Surface)& surface,
1064 const TopoDS_Face& F,
1065 SMESH_MesherHelper& helper);
1067 bool smoothComplexEdge( _SolidData& data,
1068 Handle(ShapeAnalysis_Surface)& surface,
1069 const TopoDS_Face& F,
1070 SMESH_MesherHelper& helper);
1072 gp_XYZ getNormalNormal( const gp_XYZ & normal,
1073 const gp_XYZ& edgeDir);
1075 _LayerEdge* getLEdgeOnV( bool is2nd )
1077 return _eos._edges[ is2nd ? _eos._edges.size()-1 : 0 ]->_2neibors->_edges[ is2nd ];
1079 bool isAnalytic() const { return !_anaCurve.IsNull(); }
1081 //--------------------------------------------------------------------------------
1083 * \brief Class of temporary mesh face.
1084 * We can't use SMDS_FaceOfNodes since it's impossible to set it's ID which is
1085 * needed because SMESH_ElementSearcher internaly uses set of elements sorted by ID
1087 struct _TmpMeshFace : public SMDS_MeshElement
1089 vector<const SMDS_MeshNode* > _nn;
1090 _TmpMeshFace( const vector<const SMDS_MeshNode*>& nodes,
1091 int id, int faceID=-1, int idInFace=-1):
1092 SMDS_MeshElement(id), _nn(nodes) { setShapeId(faceID); setIdInShape(idInFace); }
1093 virtual const SMDS_MeshNode* GetNode(const int ind) const { return _nn[ind]; }
1094 virtual SMDSAbs_ElementType GetType() const { return SMDSAbs_Face; }
1095 virtual vtkIdType GetVtkType() const { return -1; }
1096 virtual SMDSAbs_EntityType GetEntityType() const { return SMDSEntity_Last; }
1097 virtual SMDSAbs_GeometryType GetGeomType() const
1098 { return _nn.size() == 3 ? SMDSGeom_TRIANGLE : SMDSGeom_QUADRANGLE; }
1099 virtual SMDS_ElemIteratorPtr elementsIterator(SMDSAbs_ElementType) const
1100 { return SMDS_ElemIteratorPtr( new SMDS_NodeVectorElemIterator( _nn.begin(), _nn.end()));}
1102 //--------------------------------------------------------------------------------
1104 * \brief Class of temporary mesh face storing _LayerEdge it's based on
1106 struct _TmpMeshFaceOnEdge : public _TmpMeshFace
1108 _LayerEdge *_le1, *_le2;
1109 _TmpMeshFaceOnEdge( _LayerEdge* le1, _LayerEdge* le2, int ID ):
1110 _TmpMeshFace( vector<const SMDS_MeshNode*>(4), ID ), _le1(le1), _le2(le2)
1112 _nn[0]=_le1->_nodes[0];
1113 _nn[1]=_le1->_nodes.back();
1114 _nn[2]=_le2->_nodes.back();
1115 _nn[3]=_le2->_nodes[0];
1117 gp_XYZ GetDir() const // return average direction of _LayerEdge's, normal to EDGE
1119 SMESH_TNodeXYZ p0s( _nn[0] );
1120 SMESH_TNodeXYZ p0t( _nn[1] );
1121 SMESH_TNodeXYZ p1t( _nn[2] );
1122 SMESH_TNodeXYZ p1s( _nn[3] );
1123 gp_XYZ v0 = p0t - p0s;
1124 gp_XYZ v1 = p1t - p1s;
1125 gp_XYZ v01 = p1s - p0s;
1126 gp_XYZ n = ( v0 ^ v01 ) + ( v1 ^ v01 );
1131 gp_XYZ GetDir(_LayerEdge* le1, _LayerEdge* le2) // return average direction of _LayerEdge's
1133 _nn[0]=le1->_nodes[0];
1134 _nn[1]=le1->_nodes.back();
1135 _nn[2]=le2->_nodes.back();
1136 _nn[3]=le2->_nodes[0];
1140 //--------------------------------------------------------------------------------
1142 * \brief Retriever of node coordinates either directly or from a surface by node UV.
1143 * \warning Location of a surface is ignored
1145 struct _NodeCoordHelper
1147 SMESH_MesherHelper& _helper;
1148 const TopoDS_Face& _face;
1149 Handle(Geom_Surface) _surface;
1150 gp_XYZ (_NodeCoordHelper::* _fun)(const SMDS_MeshNode* n) const;
1152 _NodeCoordHelper(const TopoDS_Face& F, SMESH_MesherHelper& helper, bool is2D)
1153 : _helper( helper ), _face( F )
1157 TopLoc_Location loc;
1158 _surface = BRep_Tool::Surface( _face, loc );
1160 if ( _surface.IsNull() )
1161 _fun = & _NodeCoordHelper::direct;
1163 _fun = & _NodeCoordHelper::byUV;
1165 gp_XYZ operator()(const SMDS_MeshNode* n) const { return (this->*_fun)( n ); }
1168 gp_XYZ direct(const SMDS_MeshNode* n) const
1170 return SMESH_TNodeXYZ( n );
1172 gp_XYZ byUV (const SMDS_MeshNode* n) const
1174 gp_XY uv = _helper.GetNodeUV( _face, n );
1175 return _surface->Value( uv.X(), uv.Y() ).XYZ();
1179 //================================================================================
1181 * \brief Check angle between vectors
1183 //================================================================================
1185 inline bool isLessAngle( const gp_Vec& v1, const gp_Vec& v2, const double cos )
1187 double dot = v1 * v2; // cos * |v1| * |v2|
1188 double l1 = v1.SquareMagnitude();
1189 double l2 = v2.SquareMagnitude();
1190 return (( dot * cos >= 0 ) &&
1191 ( dot * dot ) / l1 / l2 >= ( cos * cos ));
1194 } // namespace VISCOUS_3D
1198 //================================================================================
1199 // StdMeshers_ViscousLayers hypothesis
1201 StdMeshers_ViscousLayers::StdMeshers_ViscousLayers(int hypId, int studyId, SMESH_Gen* gen)
1202 :SMESH_Hypothesis(hypId, studyId, gen),
1203 _isToIgnoreShapes(1), _nbLayers(1), _thickness(1), _stretchFactor(1),
1204 _method( SURF_OFFSET_SMOOTH )
1206 _name = StdMeshers_ViscousLayers::GetHypType();
1207 _param_algo_dim = -3; // auxiliary hyp used by 3D algos
1208 } // --------------------------------------------------------------------------------
1209 void StdMeshers_ViscousLayers::SetBndShapes(const std::vector<int>& faceIds, bool toIgnore)
1211 if ( faceIds != _shapeIds )
1212 _shapeIds = faceIds, NotifySubMeshesHypothesisModification();
1213 if ( _isToIgnoreShapes != toIgnore )
1214 _isToIgnoreShapes = toIgnore, NotifySubMeshesHypothesisModification();
1215 } // --------------------------------------------------------------------------------
1216 void StdMeshers_ViscousLayers::SetTotalThickness(double thickness)
1218 if ( thickness != _thickness )
1219 _thickness = thickness, NotifySubMeshesHypothesisModification();
1220 } // --------------------------------------------------------------------------------
1221 void StdMeshers_ViscousLayers::SetNumberLayers(int nb)
1223 if ( _nbLayers != nb )
1224 _nbLayers = nb, NotifySubMeshesHypothesisModification();
1225 } // --------------------------------------------------------------------------------
1226 void StdMeshers_ViscousLayers::SetStretchFactor(double factor)
1228 if ( _stretchFactor != factor )
1229 _stretchFactor = factor, NotifySubMeshesHypothesisModification();
1230 } // --------------------------------------------------------------------------------
1231 void StdMeshers_ViscousLayers::SetMethod( ExtrusionMethod method )
1233 if ( _method != method )
1234 _method = method, NotifySubMeshesHypothesisModification();
1235 } // --------------------------------------------------------------------------------
1236 SMESH_ProxyMesh::Ptr
1237 StdMeshers_ViscousLayers::Compute(SMESH_Mesh& theMesh,
1238 const TopoDS_Shape& theShape,
1239 const bool toMakeN2NMap) const
1241 using namespace VISCOUS_3D;
1242 _ViscousBuilder builder;
1243 SMESH_ComputeErrorPtr err = builder.Compute( theMesh, theShape );
1244 if ( err && !err->IsOK() )
1245 return SMESH_ProxyMesh::Ptr();
1247 vector<SMESH_ProxyMesh::Ptr> components;
1248 TopExp_Explorer exp( theShape, TopAbs_SOLID );
1249 for ( ; exp.More(); exp.Next() )
1251 if ( _MeshOfSolid* pm =
1252 _ViscousListener::GetSolidMesh( &theMesh, exp.Current(), /*toCreate=*/false))
1254 if ( toMakeN2NMap && !pm->_n2nMapComputed )
1255 if ( !builder.MakeN2NMap( pm ))
1256 return SMESH_ProxyMesh::Ptr();
1257 components.push_back( SMESH_ProxyMesh::Ptr( pm ));
1258 pm->myIsDeletable = false; // it will de deleted by boost::shared_ptr
1260 if ( pm->_warning && !pm->_warning->IsOK() )
1262 SMESH_subMesh* sm = theMesh.GetSubMesh( exp.Current() );
1263 SMESH_ComputeErrorPtr& smError = sm->GetComputeError();
1264 if ( !smError || smError->IsOK() )
1265 smError = pm->_warning;
1268 _ViscousListener::RemoveSolidMesh ( &theMesh, exp.Current() );
1270 switch ( components.size() )
1274 case 1: return components[0];
1276 default: return SMESH_ProxyMesh::Ptr( new SMESH_ProxyMesh( components ));
1278 return SMESH_ProxyMesh::Ptr();
1279 } // --------------------------------------------------------------------------------
1280 std::ostream & StdMeshers_ViscousLayers::SaveTo(std::ostream & save)
1282 save << " " << _nbLayers
1283 << " " << _thickness
1284 << " " << _stretchFactor
1285 << " " << _shapeIds.size();
1286 for ( size_t i = 0; i < _shapeIds.size(); ++i )
1287 save << " " << _shapeIds[i];
1288 save << " " << !_isToIgnoreShapes; // negate to keep the behavior in old studies.
1289 save << " " << _method;
1291 } // --------------------------------------------------------------------------------
1292 std::istream & StdMeshers_ViscousLayers::LoadFrom(std::istream & load)
1294 int nbFaces, faceID, shapeToTreat, method;
1295 load >> _nbLayers >> _thickness >> _stretchFactor >> nbFaces;
1296 while ( (int) _shapeIds.size() < nbFaces && load >> faceID )
1297 _shapeIds.push_back( faceID );
1298 if ( load >> shapeToTreat ) {
1299 _isToIgnoreShapes = !shapeToTreat;
1300 if ( load >> method )
1301 _method = (ExtrusionMethod) method;
1304 _isToIgnoreShapes = true; // old behavior
1307 } // --------------------------------------------------------------------------------
1308 bool StdMeshers_ViscousLayers::SetParametersByMesh(const SMESH_Mesh* theMesh,
1309 const TopoDS_Shape& theShape)
1313 } // --------------------------------------------------------------------------------
1314 SMESH_ComputeErrorPtr
1315 StdMeshers_ViscousLayers::CheckHypothesis(SMESH_Mesh& theMesh,
1316 const TopoDS_Shape& theShape,
1317 SMESH_Hypothesis::Hypothesis_Status& theStatus)
1319 VISCOUS_3D::_ViscousBuilder builder;
1320 SMESH_ComputeErrorPtr err = builder.CheckHypotheses( theMesh, theShape );
1321 if ( err && !err->IsOK() )
1322 theStatus = SMESH_Hypothesis::HYP_INCOMPAT_HYPS;
1324 theStatus = SMESH_Hypothesis::HYP_OK;
1328 // --------------------------------------------------------------------------------
1329 bool StdMeshers_ViscousLayers::IsShapeWithLayers(int shapeIndex) const
1332 ( std::find( _shapeIds.begin(), _shapeIds.end(), shapeIndex ) != _shapeIds.end() );
1333 return IsToIgnoreShapes() ? !isIn : isIn;
1335 // END StdMeshers_ViscousLayers hypothesis
1336 //================================================================================
1338 namespace VISCOUS_3D
1340 gp_XYZ getEdgeDir( const TopoDS_Edge& E, const TopoDS_Vertex& fromV )
1344 Handle(Geom_Curve) c = BRep_Tool::Curve( E, f, l );
1345 if ( c.IsNull() ) return gp_XYZ( Precision::Infinite(), 1e100, 1e100 );
1346 gp_Pnt p = BRep_Tool::Pnt( fromV );
1347 double distF = p.SquareDistance( c->Value( f ));
1348 double distL = p.SquareDistance( c->Value( l ));
1349 c->D1(( distF < distL ? f : l), p, dir );
1350 if ( distL < distF ) dir.Reverse();
1353 //--------------------------------------------------------------------------------
1354 gp_XYZ getEdgeDir( const TopoDS_Edge& E, const SMDS_MeshNode* atNode,
1355 SMESH_MesherHelper& helper)
1358 double f,l; gp_Pnt p;
1359 Handle(Geom_Curve) c = BRep_Tool::Curve( E, f, l );
1360 if ( c.IsNull() ) return gp_XYZ( Precision::Infinite(), 1e100, 1e100 );
1361 double u = helper.GetNodeU( E, atNode );
1365 //--------------------------------------------------------------------------------
1366 gp_XYZ getFaceDir( const TopoDS_Face& F, const TopoDS_Vertex& fromV,
1367 const SMDS_MeshNode* node, SMESH_MesherHelper& helper, bool& ok,
1369 //--------------------------------------------------------------------------------
1370 gp_XYZ getFaceDir( const TopoDS_Face& F, const TopoDS_Edge& fromE,
1371 const SMDS_MeshNode* node, SMESH_MesherHelper& helper, bool& ok)
1374 Handle(Geom_Curve) c = BRep_Tool::Curve( fromE, f, l );
1377 TopoDS_Vertex v = helper.IthVertex( 0, fromE );
1378 return getFaceDir( F, v, node, helper, ok );
1380 gp_XY uv = helper.GetNodeUV( F, node, 0, &ok );
1381 Handle(Geom_Surface) surface = BRep_Tool::Surface( F );
1382 gp_Pnt p; gp_Vec du, dv, norm;
1383 surface->D1( uv.X(),uv.Y(), p, du,dv );
1386 double u = helper.GetNodeU( fromE, node, 0, &ok );
1388 TopAbs_Orientation o = helper.GetSubShapeOri( F.Oriented(TopAbs_FORWARD), fromE);
1389 if ( o == TopAbs_REVERSED )
1392 gp_Vec dir = norm ^ du;
1394 if ( node->GetPosition()->GetTypeOfPosition() == SMDS_TOP_VERTEX &&
1395 helper.IsClosedEdge( fromE ))
1397 if ( fabs(u-f) < fabs(u-l)) c->D1( l, p, dv );
1398 else c->D1( f, p, dv );
1399 if ( o == TopAbs_REVERSED )
1401 gp_Vec dir2 = norm ^ dv;
1402 dir = dir.Normalized() + dir2.Normalized();
1406 //--------------------------------------------------------------------------------
1407 gp_XYZ getFaceDir( const TopoDS_Face& F, const TopoDS_Vertex& fromV,
1408 const SMDS_MeshNode* node, SMESH_MesherHelper& helper,
1409 bool& ok, double* cosin)
1411 TopoDS_Face faceFrw = F;
1412 faceFrw.Orientation( TopAbs_FORWARD );
1413 //double f,l; TopLoc_Location loc;
1414 TopoDS_Edge edges[2]; // sharing a vertex
1417 TopoDS_Vertex VV[2];
1418 TopExp_Explorer exp( faceFrw, TopAbs_EDGE );
1419 for ( ; exp.More() && nbEdges < 2; exp.Next() )
1421 const TopoDS_Edge& e = TopoDS::Edge( exp.Current() );
1422 if ( SMESH_Algo::isDegenerated( e )) continue;
1423 TopExp::Vertices( e, VV[0], VV[1], /*CumOri=*/true );
1424 if ( VV[1].IsSame( fromV )) {
1425 nbEdges += edges[ 0 ].IsNull();
1428 else if ( VV[0].IsSame( fromV )) {
1429 nbEdges += edges[ 1 ].IsNull();
1434 gp_XYZ dir(0,0,0), edgeDir[2];
1437 // get dirs of edges going fromV
1439 for ( size_t i = 0; i < nbEdges && ok; ++i )
1441 edgeDir[i] = getEdgeDir( edges[i], fromV );
1442 double size2 = edgeDir[i].SquareModulus();
1443 if (( ok = size2 > numeric_limits<double>::min() ))
1444 edgeDir[i] /= sqrt( size2 );
1446 if ( !ok ) return dir;
1448 // get angle between the 2 edges
1450 double angle = helper.GetAngle( edges[0], edges[1], faceFrw, fromV, &faceNormal );
1451 if ( Abs( angle ) < 5 * M_PI/180 )
1453 dir = ( faceNormal.XYZ() ^ edgeDir[0].Reversed()) + ( faceNormal.XYZ() ^ edgeDir[1] );
1457 dir = edgeDir[0] + edgeDir[1];
1462 double angle = gp_Vec( edgeDir[0] ).Angle( dir );
1463 *cosin = Cos( angle );
1466 else if ( nbEdges == 1 )
1468 dir = getFaceDir( faceFrw, edges[ edges[0].IsNull() ], node, helper, ok );
1469 if ( cosin ) *cosin = 1.;
1479 //================================================================================
1481 * \brief Finds concave VERTEXes of a FACE
1483 //================================================================================
1485 bool getConcaveVertices( const TopoDS_Face& F,
1486 SMESH_MesherHelper& helper,
1487 set< TGeomID >* vertices = 0)
1489 // check angles at VERTEXes
1491 TSideVector wires = StdMeshers_FaceSide::GetFaceWires( F, *helper.GetMesh(), 0, error );
1492 for ( size_t iW = 0; iW < wires.size(); ++iW )
1494 const int nbEdges = wires[iW]->NbEdges();
1495 if ( nbEdges < 2 && SMESH_Algo::isDegenerated( wires[iW]->Edge(0)))
1497 for ( int iE1 = 0; iE1 < nbEdges; ++iE1 )
1499 if ( SMESH_Algo::isDegenerated( wires[iW]->Edge( iE1 ))) continue;
1500 int iE2 = ( iE1 + 1 ) % nbEdges;
1501 while ( SMESH_Algo::isDegenerated( wires[iW]->Edge( iE2 )))
1502 iE2 = ( iE2 + 1 ) % nbEdges;
1503 TopoDS_Vertex V = wires[iW]->FirstVertex( iE2 );
1504 double angle = helper.GetAngle( wires[iW]->Edge( iE1 ),
1505 wires[iW]->Edge( iE2 ), F, V );
1506 if ( angle < -5. * M_PI / 180. )
1510 vertices->insert( helper.GetMeshDS()->ShapeToIndex( V ));
1514 return vertices ? !vertices->empty() : false;
1517 //================================================================================
1519 * \brief Returns true if a FACE is bound by a concave EDGE
1521 //================================================================================
1523 bool isConcave( const TopoDS_Face& F,
1524 SMESH_MesherHelper& helper,
1525 set< TGeomID >* vertices = 0 )
1527 bool isConcv = false;
1528 // if ( helper.Count( F, TopAbs_WIRE, /*useMap=*/false) > 1 )
1530 gp_Vec2d drv1, drv2;
1532 TopExp_Explorer eExp( F.Oriented( TopAbs_FORWARD ), TopAbs_EDGE );
1533 for ( ; eExp.More(); eExp.Next() )
1535 const TopoDS_Edge& E = TopoDS::Edge( eExp.Current() );
1536 if ( SMESH_Algo::isDegenerated( E )) continue;
1537 // check if 2D curve is concave
1538 BRepAdaptor_Curve2d curve( E, F );
1539 const int nbIntervals = curve.NbIntervals( GeomAbs_C2 );
1540 TColStd_Array1OfReal intervals(1, nbIntervals + 1 );
1541 curve.Intervals( intervals, GeomAbs_C2 );
1542 bool isConvex = true;
1543 for ( int i = 1; i <= nbIntervals && isConvex; ++i )
1545 double u1 = intervals( i );
1546 double u2 = intervals( i+1 );
1547 curve.D2( 0.5*( u1+u2 ), p, drv1, drv2 );
1548 double cross = drv1 ^ drv2;
1549 if ( E.Orientation() == TopAbs_REVERSED )
1551 isConvex = ( cross > -1e-9 ); // 0.1 );
1555 //cout << "Concave FACE " << helper.GetMeshDS()->ShapeToIndex( F ) << endl;
1564 // check angles at VERTEXes
1565 if ( getConcaveVertices( F, helper, vertices ))
1571 //================================================================================
1573 * \brief Computes mimimal distance of face in-FACE nodes from an EDGE
1574 * \param [in] face - the mesh face to treat
1575 * \param [in] nodeOnEdge - a node on the EDGE
1576 * \param [out] faceSize - the computed distance
1577 * \return bool - true if faceSize computed
1579 //================================================================================
1581 bool getDistFromEdge( const SMDS_MeshElement* face,
1582 const SMDS_MeshNode* nodeOnEdge,
1585 faceSize = Precision::Infinite();
1588 int nbN = face->NbCornerNodes();
1589 int iOnE = face->GetNodeIndex( nodeOnEdge );
1590 int iNext[2] = { SMESH_MesherHelper::WrapIndex( iOnE+1, nbN ),
1591 SMESH_MesherHelper::WrapIndex( iOnE-1, nbN ) };
1592 const SMDS_MeshNode* nNext[2] = { face->GetNode( iNext[0] ),
1593 face->GetNode( iNext[1] ) };
1594 gp_XYZ segVec, segEnd = SMESH_TNodeXYZ( nodeOnEdge ); // segment on EDGE
1595 double segLen = -1.;
1596 // look for two neighbor not in-FACE nodes of face
1597 for ( int i = 0; i < 2; ++i )
1599 if ( nNext[i]->GetPosition()->GetDim() != 2 &&
1600 nNext[i]->GetID() < nodeOnEdge->GetID() )
1602 // look for an in-FACE node
1603 for ( int iN = 0; iN < nbN; ++iN )
1605 if ( iN == iOnE || iN == iNext[i] )
1607 SMESH_TNodeXYZ pInFace = face->GetNode( iN );
1608 gp_XYZ v = pInFace - segEnd;
1611 segVec = SMESH_TNodeXYZ( nNext[i] ) - segEnd;
1612 segLen = segVec.Modulus();
1614 double distToSeg = v.Crossed( segVec ).Modulus() / segLen;
1615 faceSize = Min( faceSize, distToSeg );
1623 //================================================================================
1625 * \brief Return direction of axis or revolution of a surface
1627 //================================================================================
1629 bool getRovolutionAxis( const Adaptor3d_Surface& surface,
1632 switch ( surface.GetType() ) {
1635 gp_Cone cone = surface.Cone();
1636 axis = cone.Axis().Direction();
1639 case GeomAbs_Sphere:
1641 gp_Sphere sphere = surface.Sphere();
1642 axis = sphere.Position().Direction();
1645 case GeomAbs_SurfaceOfRevolution:
1647 axis = surface.AxeOfRevolution().Direction();
1650 //case GeomAbs_SurfaceOfExtrusion:
1651 case GeomAbs_OffsetSurface:
1653 Handle(Adaptor3d_HSurface) base = surface.BasisSurface();
1654 return getRovolutionAxis( base->Surface(), axis );
1656 default: return false;
1661 //--------------------------------------------------------------------------------
1662 // DEBUG. Dump intermediate node positions into a python script
1663 // HOWTO use: run python commands written in a console to see
1664 // construction steps of viscous layers
1669 PyDump(SMESH_Mesh& m) {
1670 int tag = 3 + m.GetId();
1671 const char* fname = "/tmp/viscous.py";
1672 cout << "execfile('"<<fname<<"')"<<endl;
1673 py = new ofstream(fname);
1674 *py << "import SMESH" << endl
1675 << "from salome.smesh import smeshBuilder" << endl
1676 << "smesh = smeshBuilder.New(salome.myStudy)" << endl
1677 << "meshSO = smesh.GetCurrentStudy().FindObjectID('0:1:2:" << tag <<"')" << endl
1678 << "mesh = smesh.Mesh( meshSO.GetObject() )"<<endl;
1683 *py << "mesh.GroupOnFilter(SMESH.VOLUME,'Viscous Prisms',"
1684 "smesh.GetFilter(SMESH.VOLUME,SMESH.FT_ElemGeomType,'=',SMESH.Geom_PENTA))"<<endl;
1685 *py << "mesh.GroupOnFilter(SMESH.VOLUME,'Neg Volumes',"
1686 "smesh.GetFilter(SMESH.VOLUME,SMESH.FT_Volume3D,'<',0))"<<endl;
1690 ~PyDump() { Finish(); cout << "NB FUNCTIONS: " << theNbPyFunc << endl; }
1692 #define dumpFunction(f) { _dumpFunction(f, __LINE__);}
1693 #define dumpMove(n) { _dumpMove(n, __LINE__);}
1694 #define dumpMoveComm(n,txt) { _dumpMove(n, __LINE__, txt);}
1695 #define dumpCmd(txt) { _dumpCmd(txt, __LINE__);}
1696 void _dumpFunction(const string& fun, int ln)
1697 { if (py) *py<< "def "<<fun<<"(): # "<< ln <<endl; cout<<fun<<"()"<<endl; ++theNbPyFunc; }
1698 void _dumpMove(const SMDS_MeshNode* n, int ln, const char* txt="")
1699 { if (py) *py<< " mesh.MoveNode( "<<n->GetID()<< ", "<< n->X()
1700 << ", "<<n->Y()<<", "<< n->Z()<< ")\t\t # "<< ln <<" "<< txt << endl; }
1701 void _dumpCmd(const string& txt, int ln)
1702 { if (py) *py<< " "<<txt<<" # "<< ln <<endl; }
1703 void dumpFunctionEnd()
1704 { if (py) *py<< " return"<< endl; }
1705 void dumpChangeNodes( const SMDS_MeshElement* f )
1706 { if (py) { *py<< " mesh.ChangeElemNodes( " << f->GetID()<<", [";
1707 for ( int i=1; i < f->NbNodes(); ++i ) *py << f->GetNode(i-1)->GetID()<<", ";
1708 *py << f->GetNode( f->NbNodes()-1 )->GetID() << " ])"<< endl; }}
1709 #define debugMsg( txt ) { cout << "# "<< txt << " (line: " << __LINE__ << ")" << endl; }
1713 struct PyDump { PyDump(SMESH_Mesh&) {} void Finish() {} };
1714 #define dumpFunction(f) f
1716 #define dumpMoveComm(n,txt)
1717 #define dumpCmd(txt)
1718 #define dumpFunctionEnd()
1719 #define dumpChangeNodes(f) { if(f) {} } // prevent "unused variable 'f'" warning
1720 #define debugMsg( txt ) {}
1725 using namespace VISCOUS_3D;
1727 //================================================================================
1729 * \brief Constructor of _ViscousBuilder
1731 //================================================================================
1733 _ViscousBuilder::_ViscousBuilder()
1735 _error = SMESH_ComputeError::New(COMPERR_OK);
1739 //================================================================================
1741 * \brief Stores error description and returns false
1743 //================================================================================
1745 bool _ViscousBuilder::error(const string& text, int solidId )
1747 const string prefix = string("Viscous layers builder: ");
1748 _error->myName = COMPERR_ALGO_FAILED;
1749 _error->myComment = prefix + text;
1752 SMESH_subMesh* sm = _mesh->GetSubMeshContaining( solidId );
1753 if ( !sm && !_sdVec.empty() )
1754 sm = _mesh->GetSubMeshContaining( solidId = _sdVec[0]._index );
1755 if ( sm && sm->GetSubShape().ShapeType() == TopAbs_SOLID )
1757 SMESH_ComputeErrorPtr& smError = sm->GetComputeError();
1758 if ( smError && smError->myAlgo )
1759 _error->myAlgo = smError->myAlgo;
1761 sm->ComputeStateEngine( SMESH_subMesh::CHECK_COMPUTE_STATE );
1763 // set KO to all solids
1764 for ( size_t i = 0; i < _sdVec.size(); ++i )
1766 if ( _sdVec[i]._index == solidId )
1768 sm = _mesh->GetSubMesh( _sdVec[i]._solid );
1769 if ( !sm->IsEmpty() )
1771 SMESH_ComputeErrorPtr& smError = sm->GetComputeError();
1772 if ( !smError || smError->IsOK() )
1774 smError = SMESH_ComputeError::New( COMPERR_ALGO_FAILED, prefix + "failed");
1775 sm->ComputeStateEngine( SMESH_subMesh::CHECK_COMPUTE_STATE );
1779 makeGroupOfLE(); // debug
1784 //================================================================================
1786 * \brief At study restoration, restore event listeners used to clear an inferior
1787 * dim sub-mesh modified by viscous layers
1789 //================================================================================
1791 void _ViscousBuilder::RestoreListeners()
1796 //================================================================================
1798 * \brief computes SMESH_ProxyMesh::SubMesh::_n2n
1800 //================================================================================
1802 bool _ViscousBuilder::MakeN2NMap( _MeshOfSolid* pm )
1804 SMESH_subMesh* solidSM = pm->mySubMeshes.front();
1805 TopExp_Explorer fExp( solidSM->GetSubShape(), TopAbs_FACE );
1806 for ( ; fExp.More(); fExp.Next() )
1808 SMESHDS_SubMesh* srcSmDS = pm->GetMeshDS()->MeshElements( fExp.Current() );
1809 const SMESH_ProxyMesh::SubMesh* prxSmDS = pm->GetProxySubMesh( fExp.Current() );
1811 if ( !srcSmDS || !prxSmDS || !srcSmDS->NbElements() || !prxSmDS->NbElements() )
1813 if ( srcSmDS->GetElements()->next() == prxSmDS->GetElements()->next())
1816 if ( srcSmDS->NbElements() != prxSmDS->NbElements() )
1817 return error( "Different nb elements in a source and a proxy sub-mesh", solidSM->GetId());
1819 SMDS_ElemIteratorPtr srcIt = srcSmDS->GetElements();
1820 SMDS_ElemIteratorPtr prxIt = prxSmDS->GetElements();
1821 while( prxIt->more() )
1823 const SMDS_MeshElement* fSrc = srcIt->next();
1824 const SMDS_MeshElement* fPrx = prxIt->next();
1825 if ( fSrc->NbNodes() != fPrx->NbNodes())
1826 return error( "Different elements in a source and a proxy sub-mesh", solidSM->GetId());
1827 for ( int i = 0 ; i < fPrx->NbNodes(); ++i )
1828 pm->setNode2Node( fSrc->GetNode(i), fPrx->GetNode(i), prxSmDS );
1831 pm->_n2nMapComputed = true;
1835 //================================================================================
1837 * \brief Does its job
1839 //================================================================================
1841 SMESH_ComputeErrorPtr _ViscousBuilder::Compute(SMESH_Mesh& theMesh,
1842 const TopoDS_Shape& theShape)
1846 // check if proxy mesh already computed
1847 TopExp_Explorer exp( theShape, TopAbs_SOLID );
1849 return error("No SOLID's in theShape"), _error;
1851 if ( _ViscousListener::GetSolidMesh( _mesh, exp.Current(), /*toCreate=*/false))
1852 return SMESH_ComputeErrorPtr(); // everything already computed
1854 PyDump debugDump( theMesh );
1856 // TODO: ignore already computed SOLIDs
1857 if ( !findSolidsWithLayers())
1860 if ( !findFacesWithLayers() )
1863 for ( size_t i = 0; i < _sdVec.size(); ++i )
1866 for ( iSD = 0; iSD < _sdVec.size(); ++iSD ) // find next SOLID to compute
1867 if ( _sdVec[iSD]._before.IsEmpty() &&
1868 !_sdVec[iSD]._solid.IsNull() &&
1869 _sdVec[iSD]._n2eMap.empty() )
1872 if ( ! makeLayer(_sdVec[iSD]) ) // create _LayerEdge's
1875 if ( _sdVec[iSD]._n2eMap.size() == 0 ) // no layers in a SOLID
1877 _sdVec[iSD]._solid.Nullify();
1881 if ( ! inflate(_sdVec[iSD]) ) // increase length of _LayerEdge's
1884 if ( ! refine(_sdVec[iSD]) ) // create nodes and prisms
1887 if ( ! shrink(_sdVec[iSD]) ) // shrink 2D mesh on FACEs w/o layer
1890 addBoundaryElements(_sdVec[iSD]); // create quadrangles on prism bare sides
1892 const TopoDS_Shape& solid = _sdVec[iSD]._solid;
1893 for ( iSD = 0; iSD < _sdVec.size(); ++iSD )
1894 _sdVec[iSD]._before.Remove( solid );
1897 makeGroupOfLE(); // debug
1903 //================================================================================
1905 * \brief Check validity of hypotheses
1907 //================================================================================
1909 SMESH_ComputeErrorPtr _ViscousBuilder::CheckHypotheses( SMESH_Mesh& mesh,
1910 const TopoDS_Shape& shape )
1914 if ( _ViscousListener::GetSolidMesh( _mesh, shape, /*toCreate=*/false))
1915 return SMESH_ComputeErrorPtr(); // everything already computed
1918 findSolidsWithLayers();
1919 bool ok = findFacesWithLayers( true );
1921 // remove _MeshOfSolid's of _SolidData's
1922 for ( size_t i = 0; i < _sdVec.size(); ++i )
1923 _ViscousListener::RemoveSolidMesh( _mesh, _sdVec[i]._solid );
1928 return SMESH_ComputeErrorPtr();
1931 //================================================================================
1933 * \brief Finds SOLIDs to compute using viscous layers. Fills _sdVec
1935 //================================================================================
1937 bool _ViscousBuilder::findSolidsWithLayers()
1940 TopTools_IndexedMapOfShape allSolids;
1941 TopExp::MapShapes( _mesh->GetShapeToMesh(), TopAbs_SOLID, allSolids );
1942 _sdVec.reserve( allSolids.Extent());
1944 SMESH_HypoFilter filter;
1945 for ( int i = 1; i <= allSolids.Extent(); ++i )
1947 // find StdMeshers_ViscousLayers hyp assigned to the i-th solid
1948 SMESH_subMesh* sm = _mesh->GetSubMesh( allSolids(i) );
1949 if ( sm->GetSubMeshDS() && sm->GetSubMeshDS()->NbElements() > 0 )
1950 continue; // solid is already meshed
1951 SMESH_Algo* algo = sm->GetAlgo();
1952 if ( !algo ) continue;
1953 // TODO: check if algo is hidden
1954 const list <const SMESHDS_Hypothesis *> & allHyps =
1955 algo->GetUsedHypothesis(*_mesh, allSolids(i), /*ignoreAuxiliary=*/false);
1956 _SolidData* soData = 0;
1957 list< const SMESHDS_Hypothesis *>::const_iterator hyp = allHyps.begin();
1958 const StdMeshers_ViscousLayers* viscHyp = 0;
1959 for ( ; hyp != allHyps.end(); ++hyp )
1960 if (( viscHyp = dynamic_cast<const StdMeshers_ViscousLayers*>( *hyp )))
1962 TopoDS_Shape hypShape;
1963 filter.Init( filter.Is( viscHyp ));
1964 _mesh->GetHypothesis( allSolids(i), filter, true, &hypShape );
1968 _MeshOfSolid* proxyMesh = _ViscousListener::GetSolidMesh( _mesh,
1971 _sdVec.push_back( _SolidData( allSolids(i), proxyMesh ));
1972 soData = & _sdVec.back();
1973 soData->_index = getMeshDS()->ShapeToIndex( allSolids(i));
1974 soData->_helper = new SMESH_MesherHelper( *_mesh );
1975 soData->_helper->SetSubShape( allSolids(i) );
1976 _solids.Add( allSolids(i) );
1978 soData->_hyps.push_back( viscHyp );
1979 soData->_hypShapes.push_back( hypShape );
1982 if ( _sdVec.empty() )
1984 ( SMESH_Comment(StdMeshers_ViscousLayers::GetHypType()) << " hypothesis not found",0);
1989 //================================================================================
1991 * \brief Set a _SolidData to be computed before another
1993 //================================================================================
1995 bool _ViscousBuilder::setBefore( _SolidData& solidBefore, _SolidData& solidAfter )
1997 // check possibility to set this order; get all solids before solidBefore
1998 TopTools_IndexedMapOfShape allSolidsBefore;
1999 allSolidsBefore.Add( solidBefore._solid );
2000 for ( int i = 1; i <= allSolidsBefore.Extent(); ++i )
2002 int iSD = _solids.FindIndex( allSolidsBefore(i) );
2005 TopTools_MapIteratorOfMapOfShape soIt( _sdVec[ iSD-1 ]._before );
2006 for ( ; soIt.More(); soIt.Next() )
2007 allSolidsBefore.Add( soIt.Value() );
2010 if ( allSolidsBefore.Contains( solidAfter._solid ))
2013 for ( int i = 1; i <= allSolidsBefore.Extent(); ++i )
2014 solidAfter._before.Add( allSolidsBefore(i) );
2019 //================================================================================
2023 //================================================================================
2025 bool _ViscousBuilder::findFacesWithLayers(const bool onlyWith)
2027 SMESH_MesherHelper helper( *_mesh );
2028 TopExp_Explorer exp;
2030 // collect all faces-to-ignore defined by hyp
2031 for ( size_t i = 0; i < _sdVec.size(); ++i )
2033 // get faces-to-ignore defined by each hyp
2034 typedef const StdMeshers_ViscousLayers* THyp;
2035 typedef std::pair< set<TGeomID>, THyp > TFacesOfHyp;
2036 list< TFacesOfHyp > ignoreFacesOfHyps;
2037 list< THyp >::iterator hyp = _sdVec[i]._hyps.begin();
2038 list< TopoDS_Shape >::iterator hypShape = _sdVec[i]._hypShapes.begin();
2039 for ( ; hyp != _sdVec[i]._hyps.end(); ++hyp, ++hypShape )
2041 ignoreFacesOfHyps.push_back( TFacesOfHyp( set<TGeomID>(), *hyp ));
2042 getIgnoreFaces( _sdVec[i]._solid, *hyp, *hypShape, ignoreFacesOfHyps.back().first );
2045 // fill _SolidData::_face2hyp and check compatibility of hypotheses
2046 const int nbHyps = _sdVec[i]._hyps.size();
2049 // check if two hypotheses define different parameters for the same FACE
2050 list< TFacesOfHyp >::iterator igFacesOfHyp;
2051 for ( exp.Init( _sdVec[i]._solid, TopAbs_FACE ); exp.More(); exp.Next() )
2053 const TGeomID faceID = getMeshDS()->ShapeToIndex( exp.Current() );
2055 igFacesOfHyp = ignoreFacesOfHyps.begin();
2056 for ( ; igFacesOfHyp != ignoreFacesOfHyps.end(); ++igFacesOfHyp )
2057 if ( ! igFacesOfHyp->first.count( faceID ))
2060 return error(SMESH_Comment("Several hypotheses define "
2061 "Viscous Layers on the face #") << faceID );
2062 hyp = igFacesOfHyp->second;
2065 _sdVec[i]._face2hyp.insert( make_pair( faceID, hyp ));
2067 _sdVec[i]._ignoreFaceIds.insert( faceID );
2070 // check if two hypotheses define different number of viscous layers for
2071 // adjacent faces of a solid
2072 set< int > nbLayersSet;
2073 igFacesOfHyp = ignoreFacesOfHyps.begin();
2074 for ( ; igFacesOfHyp != ignoreFacesOfHyps.end(); ++igFacesOfHyp )
2076 nbLayersSet.insert( igFacesOfHyp->second->GetNumberLayers() );
2078 if ( nbLayersSet.size() > 1 )
2080 for ( exp.Init( _sdVec[i]._solid, TopAbs_EDGE ); exp.More(); exp.Next() )
2082 PShapeIteratorPtr fIt = helper.GetAncestors( exp.Current(), *_mesh, TopAbs_FACE );
2083 THyp hyp1 = 0, hyp2 = 0;
2084 while( const TopoDS_Shape* face = fIt->next() )
2086 const TGeomID faceID = getMeshDS()->ShapeToIndex( *face );
2087 map< TGeomID, THyp >::iterator f2h = _sdVec[i]._face2hyp.find( faceID );
2088 if ( f2h != _sdVec[i]._face2hyp.end() )
2090 ( hyp1 ? hyp2 : hyp1 ) = f2h->second;
2093 if ( hyp1 && hyp2 &&
2094 hyp1->GetNumberLayers() != hyp2->GetNumberLayers() )
2096 return error("Two hypotheses define different number of "
2097 "viscous layers on adjacent faces");
2101 } // if ( nbHyps > 1 )
2104 _sdVec[i]._ignoreFaceIds.swap( ignoreFacesOfHyps.back().first );
2108 if ( onlyWith ) // is called to check hypotheses compatibility only
2111 // fill _SolidData::_reversedFaceIds
2112 for ( size_t i = 0; i < _sdVec.size(); ++i )
2114 exp.Init( _sdVec[i]._solid.Oriented( TopAbs_FORWARD ), TopAbs_FACE );
2115 for ( ; exp.More(); exp.Next() )
2117 const TopoDS_Face& face = TopoDS::Face( exp.Current() );
2118 const TGeomID faceID = getMeshDS()->ShapeToIndex( face );
2119 if ( //!sdVec[i]._ignoreFaceIds.count( faceID ) &&
2120 helper.NbAncestors( face, *_mesh, TopAbs_SOLID ) > 1 &&
2121 helper.IsReversedSubMesh( face ))
2123 _sdVec[i]._reversedFaceIds.insert( faceID );
2128 // Find FACEs to shrink mesh on (solution 2 in issue 0020832): fill in _shrinkShape2Shape
2129 TopTools_IndexedMapOfShape shapes;
2130 std::string structAlgoName = "Hexa_3D";
2131 for ( size_t i = 0; i < _sdVec.size(); ++i )
2134 TopExp::MapShapes(_sdVec[i]._solid, TopAbs_EDGE, shapes);
2135 for ( int iE = 1; iE <= shapes.Extent(); ++iE )
2137 const TopoDS_Shape& edge = shapes(iE);
2138 // find 2 FACEs sharing an EDGE
2140 PShapeIteratorPtr fIt = helper.GetAncestors(edge, *_mesh, TopAbs_FACE, &_sdVec[i]._solid);
2141 while ( fIt->more())
2143 const TopoDS_Shape* f = fIt->next();
2144 FF[ int( !FF[0].IsNull()) ] = *f;
2146 if( FF[1].IsNull() ) continue; // seam edge can be shared by 1 FACE only
2148 // check presence of layers on them
2150 for ( int j = 0; j < 2; ++j )
2151 ignore[j] = _sdVec[i]._ignoreFaceIds.count( getMeshDS()->ShapeToIndex( FF[j] ));
2152 if ( ignore[0] == ignore[1] )
2153 continue; // nothing interesting
2154 TopoDS_Shape fWOL = FF[ ignore[0] ? 0 : 1 ];
2157 if ( !fWOL.IsNull())
2159 TGeomID edgeInd = getMeshDS()->ShapeToIndex( edge );
2160 _sdVec[i]._shrinkShape2Shape.insert( make_pair( edgeInd, fWOL ));
2165 // Find the SHAPE along which to inflate _LayerEdge based on VERTEX
2167 for ( size_t i = 0; i < _sdVec.size(); ++i )
2170 TopExp::MapShapes(_sdVec[i]._solid, TopAbs_VERTEX, shapes);
2171 for ( int iV = 1; iV <= shapes.Extent(); ++iV )
2173 const TopoDS_Shape& vertex = shapes(iV);
2174 // find faces WOL sharing the vertex
2175 vector< TopoDS_Shape > facesWOL;
2176 size_t totalNbFaces = 0;
2177 PShapeIteratorPtr fIt = helper.GetAncestors(vertex, *_mesh, TopAbs_FACE, &_sdVec[i]._solid );
2178 while ( fIt->more())
2180 const TopoDS_Shape* f = fIt->next();
2182 const int fID = getMeshDS()->ShapeToIndex( *f );
2183 if ( _sdVec[i]._ignoreFaceIds.count ( fID ) /*&& !_sdVec[i]._noShrinkShapes.count( fID )*/)
2184 facesWOL.push_back( *f );
2186 if ( facesWOL.size() == totalNbFaces || facesWOL.empty() )
2187 continue; // no layers at this vertex or no WOL
2188 TGeomID vInd = getMeshDS()->ShapeToIndex( vertex );
2189 switch ( facesWOL.size() )
2193 helper.SetSubShape( facesWOL[0] );
2194 if ( helper.IsRealSeam( vInd )) // inflate along a seam edge?
2196 TopoDS_Shape seamEdge;
2197 PShapeIteratorPtr eIt = helper.GetAncestors(vertex, *_mesh, TopAbs_EDGE);
2198 while ( eIt->more() && seamEdge.IsNull() )
2200 const TopoDS_Shape* e = eIt->next();
2201 if ( helper.IsRealSeam( *e ) )
2204 if ( !seamEdge.IsNull() )
2206 _sdVec[i]._shrinkShape2Shape.insert( make_pair( vInd, seamEdge ));
2210 _sdVec[i]._shrinkShape2Shape.insert( make_pair( vInd, facesWOL[0] ));
2215 // find an edge shared by 2 faces
2216 PShapeIteratorPtr eIt = helper.GetAncestors(vertex, *_mesh, TopAbs_EDGE);
2217 while ( eIt->more())
2219 const TopoDS_Shape* e = eIt->next();
2220 if ( helper.IsSubShape( *e, facesWOL[0]) &&
2221 helper.IsSubShape( *e, facesWOL[1]))
2223 _sdVec[i]._shrinkShape2Shape.insert( make_pair( vInd, *e )); break;
2229 return error("Not yet supported case", _sdVec[i]._index);
2234 // Add to _noShrinkShapes sub-shapes of FACE's that can't be shrinked since
2235 // the algo of the SOLID sharing the FACE does not support it or for other reasons
2236 set< string > notSupportAlgos; notSupportAlgos.insert( structAlgoName );
2237 for ( size_t i = 0; i < _sdVec.size(); ++i )
2239 map< TGeomID, TopoDS_Shape >::iterator e2f = _sdVec[i]._shrinkShape2Shape.begin();
2240 for ( ; e2f != _sdVec[i]._shrinkShape2Shape.end(); ++e2f )
2242 const TopoDS_Shape& fWOL = e2f->second;
2243 const TGeomID edgeID = e2f->first;
2244 TGeomID faceID = getMeshDS()->ShapeToIndex( fWOL );
2245 TopoDS_Shape edge = getMeshDS()->IndexToShape( edgeID );
2246 if ( edge.ShapeType() != TopAbs_EDGE )
2247 continue; // shrink shape is VERTEX
2250 PShapeIteratorPtr soIt = helper.GetAncestors(fWOL, *_mesh, TopAbs_SOLID);
2251 while ( soIt->more() && solid.IsNull() )
2253 const TopoDS_Shape* so = soIt->next();
2254 if ( !so->IsSame( _sdVec[i]._solid ))
2257 if ( solid.IsNull() )
2260 bool noShrinkE = false;
2261 SMESH_Algo* algo = _mesh->GetSubMesh( solid )->GetAlgo();
2262 bool isStructured = ( algo && algo->GetName() == structAlgoName );
2263 size_t iSolid = _solids.FindIndex( solid ) - 1;
2264 if ( iSolid < _sdVec.size() && _sdVec[ iSolid ]._ignoreFaceIds.count( faceID ))
2266 // the adjacent SOLID has NO layers on fWOL;
2267 // shrink allowed if
2268 // - there are layers on the EDGE in the adjacent SOLID
2269 // - there are NO layers in the adjacent SOLID && algo is unstructured and computed later
2270 bool hasWLAdj = (_sdVec[iSolid]._shrinkShape2Shape.count( edgeID ));
2271 bool shrinkAllowed = (( hasWLAdj ) ||
2272 ( !isStructured && setBefore( _sdVec[ i ], _sdVec[ iSolid ] )));
2273 noShrinkE = !shrinkAllowed;
2275 else if ( iSolid < _sdVec.size() )
2277 // the adjacent SOLID has layers on fWOL;
2278 // check if SOLID's mesh is unstructured and then try to set it
2279 // to be computed after the i-th solid
2280 if ( isStructured || !setBefore( _sdVec[ i ], _sdVec[ iSolid ] ))
2281 noShrinkE = true; // don't shrink fWOL
2285 // the adjacent SOLID has NO layers at all
2286 noShrinkE = isStructured;
2291 _sdVec[i]._noShrinkShapes.insert( edgeID );
2293 // check if there is a collision with to-shrink-from EDGEs in iSolid
2294 // if ( iSolid < _sdVec.size() )
2297 // TopExp::MapShapes( fWOL, TopAbs_EDGE, shapes);
2298 // for ( int iE = 1; iE <= shapes.Extent(); ++iE )
2300 // const TopoDS_Edge& E = TopoDS::Edge( shapes( iE ));
2301 // const TGeomID eID = getMeshDS()->ShapeToIndex( E );
2302 // if ( eID == edgeID ||
2303 // !_sdVec[iSolid]._shrinkShape2Shape.count( eID ) ||
2304 // _sdVec[i]._noShrinkShapes.count( eID ))
2306 // for ( int is1st = 0; is1st < 2; ++is1st )
2308 // TopoDS_Vertex V = helper.IthVertex( is1st, E );
2309 // if ( _sdVec[i]._noShrinkShapes.count( getMeshDS()->ShapeToIndex( V ) ))
2311 // return error("No way to make a conformal mesh with "
2312 // "the given set of faces with layers", _sdVec[i]._index);
2319 // add VERTEXes of the edge in _noShrinkShapes, which is necessary if
2320 // _shrinkShape2Shape is different in the adjacent SOLID
2321 for ( TopoDS_Iterator vIt( edge ); vIt.More(); vIt.Next() )
2323 TGeomID vID = getMeshDS()->ShapeToIndex( vIt.Value() );
2324 bool noShrinkV = false;
2326 if ( iSolid < _sdVec.size() )
2328 if ( _sdVec[ iSolid ]._ignoreFaceIds.count( faceID ))
2330 map< TGeomID, TopoDS_Shape >::iterator i2S, i2SAdj;
2331 i2S = _sdVec[i ]._shrinkShape2Shape.find( vID );
2332 i2SAdj = _sdVec[iSolid]._shrinkShape2Shape.find( vID );
2333 if ( i2SAdj == _sdVec[iSolid]._shrinkShape2Shape.end() )
2334 noShrinkV = ( i2S->second.ShapeType() == TopAbs_EDGE || isStructured );
2336 noShrinkV = ( ! i2S->second.IsSame( i2SAdj->second ));
2340 noShrinkV = noShrinkE;
2345 // the adjacent SOLID has NO layers at all
2346 noShrinkV = ( isStructured ||
2347 _sdVec[i]._shrinkShape2Shape[ vID ].ShapeType() == TopAbs_EDGE );
2350 _sdVec[i]._noShrinkShapes.insert( vID );
2353 } // loop on _sdVec[i]._shrinkShape2Shape
2354 } // loop on _sdVec to fill in _SolidData::_noShrinkShapes
2357 // add FACEs of other SOLIDs to _ignoreFaceIds
2358 for ( size_t i = 0; i < _sdVec.size(); ++i )
2361 TopExp::MapShapes(_sdVec[i]._solid, TopAbs_FACE, shapes);
2363 for ( exp.Init( _mesh->GetShapeToMesh(), TopAbs_FACE ); exp.More(); exp.Next() )
2365 if ( !shapes.Contains( exp.Current() ))
2366 _sdVec[i]._ignoreFaceIds.insert( getMeshDS()->ShapeToIndex( exp.Current() ));
2373 //================================================================================
2375 * \brief Finds FACEs w/o layers for a given SOLID by an hypothesis
2377 //================================================================================
2379 void _ViscousBuilder::getIgnoreFaces(const TopoDS_Shape& solid,
2380 const StdMeshers_ViscousLayers* hyp,
2381 const TopoDS_Shape& hypShape,
2382 set<TGeomID>& ignoreFaceIds)
2384 TopExp_Explorer exp;
2386 vector<TGeomID> ids = hyp->GetBndShapes();
2387 if ( hyp->IsToIgnoreShapes() ) // FACEs to ignore are given
2389 for ( size_t ii = 0; ii < ids.size(); ++ii )
2391 const TopoDS_Shape& s = getMeshDS()->IndexToShape( ids[ii] );
2392 if ( !s.IsNull() && s.ShapeType() == TopAbs_FACE )
2393 ignoreFaceIds.insert( ids[ii] );
2396 else // FACEs with layers are given
2398 exp.Init( solid, TopAbs_FACE );
2399 for ( ; exp.More(); exp.Next() )
2401 TGeomID faceInd = getMeshDS()->ShapeToIndex( exp.Current() );
2402 if ( find( ids.begin(), ids.end(), faceInd ) == ids.end() )
2403 ignoreFaceIds.insert( faceInd );
2407 // ignore internal FACEs if inlets and outlets are specified
2408 if ( hyp->IsToIgnoreShapes() )
2410 TopTools_IndexedDataMapOfShapeListOfShape solidsOfFace;
2411 TopExp::MapShapesAndAncestors( hypShape,
2412 TopAbs_FACE, TopAbs_SOLID, solidsOfFace);
2414 for ( exp.Init( solid, TopAbs_FACE ); exp.More(); exp.Next() )
2416 const TopoDS_Face& face = TopoDS::Face( exp.Current() );
2417 if ( SMESH_MesherHelper::NbAncestors( face, *_mesh, TopAbs_SOLID ) < 2 )
2420 int nbSolids = solidsOfFace.FindFromKey( face ).Extent();
2422 ignoreFaceIds.insert( getMeshDS()->ShapeToIndex( face ));
2427 //================================================================================
2429 * \brief Create the inner surface of the viscous layer and prepare data for infation
2431 //================================================================================
2433 bool _ViscousBuilder::makeLayer(_SolidData& data)
2435 // get all sub-shapes to make layers on
2436 set<TGeomID> subIds, faceIds;
2437 subIds = data._noShrinkShapes;
2438 TopExp_Explorer exp( data._solid, TopAbs_FACE );
2439 for ( ; exp.More(); exp.Next() )
2441 SMESH_subMesh* fSubM = _mesh->GetSubMesh( exp.Current() );
2442 if ( ! data._ignoreFaceIds.count( fSubM->GetId() ))
2443 faceIds.insert( fSubM->GetId() );
2446 // make a map to find new nodes on sub-shapes shared with other SOLID
2447 map< TGeomID, TNode2Edge* >::iterator s2ne;
2448 map< TGeomID, TopoDS_Shape >::iterator s2s = data._shrinkShape2Shape.begin();
2449 for (; s2s != data._shrinkShape2Shape.end(); ++s2s )
2451 TGeomID shapeInd = s2s->first;
2452 for ( size_t i = 0; i < _sdVec.size(); ++i )
2454 if ( _sdVec[i]._index == data._index ) continue;
2455 map< TGeomID, TopoDS_Shape >::iterator s2s2 = _sdVec[i]._shrinkShape2Shape.find( shapeInd );
2456 if ( s2s2 != _sdVec[i]._shrinkShape2Shape.end() &&
2457 *s2s == *s2s2 && !_sdVec[i]._n2eMap.empty() )
2459 data._s2neMap.insert( make_pair( shapeInd, &_sdVec[i]._n2eMap ));
2465 // Create temporary faces and _LayerEdge's
2467 dumpFunction(SMESH_Comment("makeLayers_")<<data._index);
2469 data._stepSize = Precision::Infinite();
2470 data._stepSizeNodes[0] = 0;
2472 SMESH_MesherHelper helper( *_mesh );
2473 helper.SetSubShape( data._solid );
2474 helper.SetElementsOnShape( true );
2476 vector< const SMDS_MeshNode*> newNodes; // of a mesh face
2477 TNode2Edge::iterator n2e2;
2479 // collect _LayerEdge's of shapes they are based on
2480 vector< _EdgesOnShape >& edgesByGeom = data._edgesOnShape;
2481 const int nbShapes = getMeshDS()->MaxShapeIndex();
2482 edgesByGeom.resize( nbShapes+1 );
2484 // set data of _EdgesOnShape's
2485 if ( SMESH_subMesh* sm = _mesh->GetSubMesh( data._solid ))
2487 SMESH_subMeshIteratorPtr smIt = sm->getDependsOnIterator(/*includeSelf=*/false);
2488 while ( smIt->more() )
2491 if ( sm->GetSubShape().ShapeType() == TopAbs_FACE &&
2492 !faceIds.count( sm->GetId() ))
2494 setShapeData( edgesByGeom[ sm->GetId() ], sm, data );
2497 // make _LayerEdge's
2498 for ( set<TGeomID>::iterator id = faceIds.begin(); id != faceIds.end(); ++id )
2500 const TopoDS_Face& F = TopoDS::Face( getMeshDS()->IndexToShape( *id ));
2501 SMESH_subMesh* sm = _mesh->GetSubMesh( F );
2502 SMESH_ProxyMesh::SubMesh* proxySub =
2503 data._proxyMesh->getFaceSubM( F, /*create=*/true);
2505 SMESHDS_SubMesh* smDS = sm->GetSubMeshDS();
2506 if ( !smDS ) return error(SMESH_Comment("Not meshed face ") << *id, data._index );
2508 SMDS_ElemIteratorPtr eIt = smDS->GetElements();
2509 while ( eIt->more() )
2511 const SMDS_MeshElement* face = eIt->next();
2512 double faceMaxCosin = -1;
2513 _LayerEdge* maxCosinEdge = 0;
2514 int nbDegenNodes = 0;
2516 newNodes.resize( face->NbCornerNodes() );
2517 for ( size_t i = 0 ; i < newNodes.size(); ++i )
2519 const SMDS_MeshNode* n = face->GetNode( i );
2520 const int shapeID = n->getshapeId();
2521 const bool onDegenShap = helper.IsDegenShape( shapeID );
2522 const bool onDegenEdge = ( onDegenShap && n->GetPosition()->GetDim() == 1 );
2527 // substitute n on a degenerated EDGE with a node on a corresponding VERTEX
2528 const TopoDS_Shape& E = getMeshDS()->IndexToShape( shapeID );
2529 TopoDS_Vertex V = helper.IthVertex( 0, TopoDS::Edge( E ));
2530 if ( const SMDS_MeshNode* vN = SMESH_Algo::VertexNode( V, getMeshDS() )) {
2540 TNode2Edge::iterator n2e = data._n2eMap.insert( make_pair( n, (_LayerEdge*)0 )).first;
2541 if ( !(*n2e).second )
2544 _LayerEdge* edge = new _LayerEdge();
2545 edge->_nodes.push_back( n );
2547 edgesByGeom[ shapeID ]._edges.push_back( edge );
2548 const bool noShrink = data._noShrinkShapes.count( shapeID );
2550 SMESH_TNodeXYZ xyz( n );
2552 // set edge data or find already refined _LayerEdge and get data from it
2553 if (( !noShrink ) &&
2554 ( n->GetPosition()->GetTypeOfPosition() != SMDS_TOP_FACE ) &&
2555 (( s2ne = data._s2neMap.find( shapeID )) != data._s2neMap.end() ) &&
2556 (( n2e2 = (*s2ne).second->find( n )) != s2ne->second->end() ))
2558 _LayerEdge* foundEdge = (*n2e2).second;
2559 gp_XYZ lastPos = edge->Copy( *foundEdge, edgesByGeom[ shapeID ], helper );
2560 foundEdge->_pos.push_back( lastPos );
2561 // location of the last node is modified and we restore it by foundEdge->_pos.back()
2562 const_cast< SMDS_MeshNode* >
2563 ( edge->_nodes.back() )->setXYZ( xyz.X(), xyz.Y(), xyz.Z() );
2569 edge->_nodes.push_back( helper.AddNode( xyz.X(), xyz.Y(), xyz.Z() ));
2571 if ( !setEdgeData( *edge, edgesByGeom[ shapeID ], helper, data ))
2574 if ( edge->_nodes.size() < 2 )
2575 edge->Block( data );
2576 //data._noShrinkShapes.insert( shapeID );
2578 dumpMove(edge->_nodes.back());
2580 if ( edge->_cosin > faceMaxCosin )
2582 faceMaxCosin = edge->_cosin;
2583 maxCosinEdge = edge;
2586 newNodes[ i ] = n2e->second->_nodes.back();
2589 data._n2eMap.insert( make_pair( face->GetNode( i ), n2e->second ));
2591 if ( newNodes.size() - nbDegenNodes < 2 )
2594 // create a temporary face
2595 const SMDS_MeshElement* newFace =
2596 new _TmpMeshFace( newNodes, --_tmpFaceID, face->getshapeId(), face->getIdInShape() );
2597 proxySub->AddElement( newFace );
2599 // compute inflation step size by min size of element on a convex surface
2600 if ( faceMaxCosin > theMinSmoothCosin )
2601 limitStepSize( data, face, maxCosinEdge );
2603 } // loop on 2D elements on a FACE
2604 } // loop on FACEs of a SOLID to create _LayerEdge's
2607 // Set _LayerEdge::_neibors
2608 TNode2Edge::iterator n2e;
2609 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
2611 _EdgesOnShape& eos = data._edgesOnShape[iS];
2612 for ( size_t i = 0; i < eos._edges.size(); ++i )
2614 _LayerEdge* edge = eos._edges[i];
2615 TIDSortedNodeSet nearNodes;
2616 SMDS_ElemIteratorPtr fIt = edge->_nodes[0]->GetInverseElementIterator(SMDSAbs_Face);
2617 while ( fIt->more() )
2619 const SMDS_MeshElement* f = fIt->next();
2620 if ( !data._ignoreFaceIds.count( f->getshapeId() ))
2621 nearNodes.insert( f->begin_nodes(), f->end_nodes() );
2623 nearNodes.erase( edge->_nodes[0] );
2624 edge->_neibors.reserve( nearNodes.size() );
2625 TIDSortedNodeSet::iterator node = nearNodes.begin();
2626 for ( ; node != nearNodes.end(); ++node )
2627 if (( n2e = data._n2eMap.find( *node )) != data._n2eMap.end() )
2628 edge->_neibors.push_back( n2e->second );
2632 data._epsilon = 1e-7;
2633 if ( data._stepSize < 1. )
2634 data._epsilon *= data._stepSize;
2636 if ( !findShapesToSmooth( data )) // _LayerEdge::_maxLen is computed here
2639 // limit data._stepSize depending on surface curvature and fill data._convexFaces
2640 limitStepSizeByCurvature( data ); // !!! it must be before node substitution in _Simplex
2642 // Set target nodes into _Simplex and _LayerEdge's to _2NearEdges
2643 const SMDS_MeshNode* nn[2];
2644 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
2646 _EdgesOnShape& eos = data._edgesOnShape[iS];
2647 for ( size_t i = 0; i < eos._edges.size(); ++i )
2649 _LayerEdge* edge = eos._edges[i];
2650 if ( edge->IsOnEdge() )
2652 // get neighbor nodes
2653 bool hasData = ( edge->_2neibors->_edges[0] );
2654 if ( hasData ) // _LayerEdge is a copy of another one
2656 nn[0] = edge->_2neibors->srcNode(0);
2657 nn[1] = edge->_2neibors->srcNode(1);
2659 else if ( !findNeiborsOnEdge( edge, nn[0],nn[1], eos, data ))
2663 // set neighbor _LayerEdge's
2664 for ( int j = 0; j < 2; ++j )
2666 if (( n2e = data._n2eMap.find( nn[j] )) == data._n2eMap.end() )
2667 return error("_LayerEdge not found by src node", data._index);
2668 edge->_2neibors->_edges[j] = n2e->second;
2671 edge->SetDataByNeighbors( nn[0], nn[1], eos, helper );
2674 for ( size_t j = 0; j < edge->_simplices.size(); ++j )
2676 _Simplex& s = edge->_simplices[j];
2677 s._nNext = data._n2eMap[ s._nNext ]->_nodes.back();
2678 s._nPrev = data._n2eMap[ s._nPrev ]->_nodes.back();
2681 // For an _LayerEdge on a degenerated EDGE, copy some data from
2682 // a corresponding _LayerEdge on a VERTEX
2683 // (issue 52453, pb on a downloaded SampleCase2-Tet-netgen-mephisto.hdf)
2684 if ( helper.IsDegenShape( edge->_nodes[0]->getshapeId() ))
2686 // Generally we should not get here
2687 if ( eos.ShapeType() != TopAbs_EDGE )
2689 TopoDS_Vertex V = helper.IthVertex( 0, TopoDS::Edge( eos._shape ));
2690 const SMDS_MeshNode* vN = SMESH_Algo::VertexNode( V, getMeshDS() );
2691 if (( n2e = data._n2eMap.find( vN )) == data._n2eMap.end() )
2693 const _LayerEdge* vEdge = n2e->second;
2694 edge->_normal = vEdge->_normal;
2695 edge->_lenFactor = vEdge->_lenFactor;
2696 edge->_cosin = vEdge->_cosin;
2699 } // loop on data._edgesOnShape._edges
2700 } // loop on data._edgesOnShape
2702 // fix _LayerEdge::_2neibors on EDGEs to smooth
2703 // map< TGeomID,Handle(Geom_Curve)>::iterator e2c = data._edge2curve.begin();
2704 // for ( ; e2c != data._edge2curve.end(); ++e2c )
2705 // if ( !e2c->second.IsNull() )
2707 // if ( _EdgesOnShape* eos = data.GetShapeEdges( e2c->first ))
2708 // data.Sort2NeiborsOnEdge( eos->_edges );
2715 //================================================================================
2717 * \brief Compute inflation step size by min size of element on a convex surface
2719 //================================================================================
2721 void _ViscousBuilder::limitStepSize( _SolidData& data,
2722 const SMDS_MeshElement* face,
2723 const _LayerEdge* maxCosinEdge )
2726 double minSize = 10 * data._stepSize;
2727 const int nbNodes = face->NbCornerNodes();
2728 for ( int i = 0; i < nbNodes; ++i )
2730 const SMDS_MeshNode* nextN = face->GetNode( SMESH_MesherHelper::WrapIndex( i+1, nbNodes ));
2731 const SMDS_MeshNode* curN = face->GetNode( i );
2732 if ( nextN->GetPosition()->GetTypeOfPosition() == SMDS_TOP_FACE ||
2733 curN-> GetPosition()->GetTypeOfPosition() == SMDS_TOP_FACE )
2735 double dist = SMESH_TNodeXYZ( curN ).Distance( nextN );
2736 if ( dist < minSize )
2737 minSize = dist, iN = i;
2740 double newStep = 0.8 * minSize / maxCosinEdge->_lenFactor;
2741 if ( newStep < data._stepSize )
2743 data._stepSize = newStep;
2744 data._stepSizeCoeff = 0.8 / maxCosinEdge->_lenFactor;
2745 data._stepSizeNodes[0] = face->GetNode( iN );
2746 data._stepSizeNodes[1] = face->GetNode( SMESH_MesherHelper::WrapIndex( iN+1, nbNodes ));
2750 //================================================================================
2752 * \brief Compute inflation step size by min size of element on a convex surface
2754 //================================================================================
2756 void _ViscousBuilder::limitStepSize( _SolidData& data, const double minSize )
2758 if ( minSize < data._stepSize )
2760 data._stepSize = minSize;
2761 if ( data._stepSizeNodes[0] )
2764 SMESH_TNodeXYZ(data._stepSizeNodes[0]).Distance(data._stepSizeNodes[1]);
2765 data._stepSizeCoeff = data._stepSize / dist;
2770 //================================================================================
2772 * \brief Limit data._stepSize by evaluating curvature of shapes and fill data._convexFaces
2774 //================================================================================
2776 void _ViscousBuilder::limitStepSizeByCurvature( _SolidData& data )
2778 SMESH_MesherHelper helper( *_mesh );
2780 const int nbTestPnt = 5; // on a FACE sub-shape
2782 BRepLProp_SLProps surfProp( 2, 1e-6 );
2783 data._convexFaces.clear();
2785 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
2787 _EdgesOnShape& eof = data._edgesOnShape[iS];
2788 if ( eof.ShapeType() != TopAbs_FACE ||
2789 data._ignoreFaceIds.count( eof._shapeID ))
2792 TopoDS_Face F = TopoDS::Face( eof._shape );
2793 SMESH_subMesh * sm = eof._subMesh;
2794 const TGeomID faceID = eof._shapeID;
2796 BRepAdaptor_Surface surface( F, false );
2797 surfProp.SetSurface( surface );
2799 bool isTooCurved = false;
2801 _ConvexFace cnvFace;
2802 const double oriFactor = ( F.Orientation() == TopAbs_REVERSED ? +1. : -1. );
2803 SMESH_subMeshIteratorPtr smIt = sm->getDependsOnIterator(/*includeSelf=*/true);
2804 while ( smIt->more() )
2807 const TGeomID subID = sm->GetId();
2808 // find _LayerEdge's of a sub-shape
2810 if (( eos = data.GetShapeEdges( subID )))
2811 cnvFace._subIdToEOS.insert( make_pair( subID, eos ));
2814 // check concavity and curvature and limit data._stepSize
2815 const double minCurvature =
2816 1. / ( eos->_hyp.GetTotalThickness() * ( 1 + theThickToIntersection ));
2817 size_t iStep = Max( 1, eos->_edges.size() / nbTestPnt );
2818 for ( size_t i = 0; i < eos->_edges.size(); i += iStep )
2820 gp_XY uv = helper.GetNodeUV( F, eos->_edges[ i ]->_nodes[0] );
2821 surfProp.SetParameters( uv.X(), uv.Y() );
2822 if ( !surfProp.IsCurvatureDefined() )
2824 if ( surfProp.MaxCurvature() * oriFactor > minCurvature )
2826 limitStepSize( data, 0.9 / surfProp.MaxCurvature() * oriFactor );
2829 if ( surfProp.MinCurvature() * oriFactor > minCurvature )
2831 limitStepSize( data, 0.9 / surfProp.MinCurvature() * oriFactor );
2835 } // loop on sub-shapes of the FACE
2837 if ( !isTooCurved ) continue;
2839 _ConvexFace & convFace =
2840 data._convexFaces.insert( make_pair( faceID, cnvFace )).first->second;
2843 convFace._normalsFixed = false;
2845 // skip a closed surface (data._convexFaces is useful anyway)
2846 bool isClosedF = false;
2847 helper.SetSubShape( F );
2848 if ( helper.HasRealSeam() )
2850 // in the closed surface there must be a closed EDGE
2851 for ( TopExp_Explorer eIt( F, TopAbs_EDGE ); eIt.More() && !isClosedF; eIt.Next() )
2852 isClosedF = helper.IsClosedEdge( TopoDS::Edge( eIt.Current() ));
2856 // limit _LayerEdge::_maxLen on the FACE
2857 const double minCurvature =
2858 1. / ( eof._hyp.GetTotalThickness() * ( 1 + theThickToIntersection ));
2859 map< TGeomID, _EdgesOnShape* >::iterator id2eos = cnvFace._subIdToEOS.find( faceID );
2860 if ( id2eos != cnvFace._subIdToEOS.end() )
2862 _EdgesOnShape& eos = * id2eos->second;
2863 for ( size_t i = 0; i < eos._edges.size(); ++i )
2865 _LayerEdge* ledge = eos._edges[ i ];
2866 gp_XY uv = helper.GetNodeUV( F, ledge->_nodes[0] );
2867 surfProp.SetParameters( uv.X(), uv.Y() );
2868 if ( !surfProp.IsCurvatureDefined() )
2871 if ( surfProp.MaxCurvature() * oriFactor > minCurvature )
2872 ledge->_maxLen = Min( ledge->_maxLen, 1. / surfProp.MaxCurvature() * oriFactor );
2874 if ( surfProp.MinCurvature() * oriFactor > minCurvature )
2875 ledge->_maxLen = Min( ledge->_maxLen, 1. / surfProp.MinCurvature() * oriFactor );
2881 // Fill _ConvexFace::_simplexTestEdges. These _LayerEdge's are used to detect
2882 // prism distortion.
2883 map< TGeomID, _EdgesOnShape* >::iterator id2eos = convFace._subIdToEOS.find( faceID );
2884 if ( id2eos != convFace._subIdToEOS.end() && !id2eos->second->_edges.empty() )
2886 // there are _LayerEdge's on the FACE it-self;
2887 // select _LayerEdge's near EDGEs
2888 _EdgesOnShape& eos = * id2eos->second;
2889 for ( size_t i = 0; i < eos._edges.size(); ++i )
2891 _LayerEdge* ledge = eos._edges[ i ];
2892 for ( size_t j = 0; j < ledge->_simplices.size(); ++j )
2893 if ( ledge->_simplices[j]._nNext->GetPosition()->GetDim() < 2 )
2895 convFace._simplexTestEdges.push_back( ledge );
2902 // where there are no _LayerEdge's on a _ConvexFace,
2903 // as e.g. on a fillet surface with no internal nodes - issue 22580,
2904 // so that collision of viscous internal faces is not detected by check of
2905 // intersection of _LayerEdge's with the viscous internal faces.
2907 set< const SMDS_MeshNode* > usedNodes;
2909 // look for _LayerEdge's with null _sWOL
2910 id2eos = convFace._subIdToEOS.begin();
2911 for ( ; id2eos != convFace._subIdToEOS.end(); ++id2eos )
2913 _EdgesOnShape& eos = * id2eos->second;
2914 if ( !eos._sWOL.IsNull() )
2916 for ( size_t i = 0; i < eos._edges.size(); ++i )
2918 _LayerEdge* ledge = eos._edges[ i ];
2919 const SMDS_MeshNode* srcNode = ledge->_nodes[0];
2920 if ( !usedNodes.insert( srcNode ).second ) continue;
2922 for ( size_t i = 0; i < ledge->_simplices.size(); ++i )
2924 usedNodes.insert( ledge->_simplices[i]._nPrev );
2925 usedNodes.insert( ledge->_simplices[i]._nNext );
2927 convFace._simplexTestEdges.push_back( ledge );
2931 } // loop on FACEs of data._solid
2934 //================================================================================
2936 * \brief Detect shapes (and _LayerEdge's on them) to smooth
2938 //================================================================================
2940 bool _ViscousBuilder::findShapesToSmooth( _SolidData& data )
2942 // define allowed thickness
2943 computeGeomSize( data ); // compute data._geomSize and _LayerEdge::_maxLen
2945 data._maxThickness = 0;
2946 data._minThickness = 1e100;
2947 list< const StdMeshers_ViscousLayers* >::iterator hyp = data._hyps.begin();
2948 for ( ; hyp != data._hyps.end(); ++hyp )
2950 data._maxThickness = Max( data._maxThickness, (*hyp)->GetTotalThickness() );
2951 data._minThickness = Min( data._minThickness, (*hyp)->GetTotalThickness() );
2953 //const double tgtThick = /*Min( 0.5 * data._geomSize, */data._maxThickness;
2955 // Find shapes needing smoothing; such a shape has _LayerEdge._normal on it's
2956 // boundary inclined to the shape at a sharp angle
2958 //list< TGeomID > shapesToSmooth;
2959 TopTools_MapOfShape edgesOfSmooFaces;
2961 SMESH_MesherHelper helper( *_mesh );
2964 vector< _EdgesOnShape >& edgesByGeom = data._edgesOnShape;
2965 data._nbShapesToSmooth = 0;
2967 for ( size_t iS = 0; iS < edgesByGeom.size(); ++iS ) // check FACEs
2969 _EdgesOnShape& eos = edgesByGeom[iS];
2970 eos._toSmooth = false;
2971 if ( eos._edges.empty() || eos.ShapeType() != TopAbs_FACE )
2974 double tgtThick = eos._hyp.GetTotalThickness();
2975 TopExp_Explorer eExp( edgesByGeom[iS]._shape, TopAbs_EDGE );
2976 for ( ; eExp.More() && !eos._toSmooth; eExp.Next() )
2978 TGeomID iE = getMeshDS()->ShapeToIndex( eExp.Current() );
2979 vector<_LayerEdge*>& eE = edgesByGeom[ iE ]._edges;
2980 if ( eE.empty() ) continue;
2983 for ( size_t i = 0; i < eE.size() && !eos._toSmooth; ++i )
2984 if ( eE[i]->_cosin > theMinSmoothCosin )
2986 SMDS_ElemIteratorPtr fIt = eE[i]->_nodes[0]->GetInverseElementIterator(SMDSAbs_Face);
2987 while ( fIt->more() && !eos._toSmooth )
2989 const SMDS_MeshElement* face = fIt->next();
2990 if ( face->getshapeId() == eos._shapeID &&
2991 getDistFromEdge( face, eE[i]->_nodes[0], faceSize ))
2993 eos._toSmooth = needSmoothing( eE[i]->_cosin, tgtThick, faceSize );
2998 if ( eos._toSmooth )
3000 for ( eExp.ReInit(); eExp.More(); eExp.Next() )
3001 edgesOfSmooFaces.Add( eExp.Current() );
3003 data.PrepareEdgesToSmoothOnFace( &edgesByGeom[iS], /*substituteSrcNodes=*/false );
3005 data._nbShapesToSmooth += eos._toSmooth;
3009 for ( size_t iS = 0; iS < edgesByGeom.size(); ++iS ) // check EDGEs
3011 _EdgesOnShape& eos = edgesByGeom[iS];
3012 eos._edgeSmoother = NULL;
3013 if ( eos._edges.empty() || eos.ShapeType() != TopAbs_EDGE ) continue;
3014 if ( !eos._hyp.ToSmooth() ) continue;
3016 const TopoDS_Edge& E = TopoDS::Edge( edgesByGeom[iS]._shape );
3017 if ( SMESH_Algo::isDegenerated( E ) || !edgesOfSmooFaces.Contains( E ))
3020 double tgtThick = eos._hyp.GetTotalThickness();
3021 for ( TopoDS_Iterator vIt( E ); vIt.More() && !eos._toSmooth; vIt.Next() )
3023 TGeomID iV = getMeshDS()->ShapeToIndex( vIt.Value() );
3024 vector<_LayerEdge*>& eV = edgesByGeom[ iV ]._edges;
3025 if ( eV.empty() || eV[0]->Is( _LayerEdge::MULTI_NORMAL )) continue;
3026 gp_Vec eDir = getEdgeDir( E, TopoDS::Vertex( vIt.Value() ));
3027 double angle = eDir.Angle( eV[0]->_normal );
3028 double cosin = Cos( angle );
3029 double cosinAbs = Abs( cosin );
3030 if ( cosinAbs > theMinSmoothCosin )
3032 // always smooth analytic EDGEs
3033 Handle(Geom_Curve) curve = _Smoother1D::CurveForSmooth( E, eos, helper );
3034 eos._toSmooth = ! curve.IsNull();
3036 // compare tgtThick with the length of an end segment
3037 SMDS_ElemIteratorPtr eIt = eV[0]->_nodes[0]->GetInverseElementIterator(SMDSAbs_Edge);
3038 while ( eIt->more() && !eos._toSmooth )
3040 const SMDS_MeshElement* endSeg = eIt->next();
3041 if ( endSeg->getshapeId() == (int) iS )
3044 SMESH_TNodeXYZ( endSeg->GetNode(0) ).Distance( endSeg->GetNode(1 ));
3045 eos._toSmooth = needSmoothing( cosinAbs, tgtThick, segLen );
3048 if ( eos._toSmooth )
3050 eos._edgeSmoother = new _Smoother1D( curve, eos );
3052 for ( size_t i = 0; i < eos._edges.size(); ++i )
3053 eos._edges[i]->Set( _LayerEdge::TO_SMOOTH );
3057 data._nbShapesToSmooth += eos._toSmooth;
3061 // Reset _cosin if no smooth is allowed by the user
3062 for ( size_t iS = 0; iS < edgesByGeom.size(); ++iS )
3064 _EdgesOnShape& eos = edgesByGeom[iS];
3065 if ( eos._edges.empty() ) continue;
3067 if ( !eos._hyp.ToSmooth() )
3068 for ( size_t i = 0; i < eos._edges.size(); ++i )
3069 eos._edges[i]->SetCosin( 0 );
3073 // Fill _eosC1 to make that C1 FACEs and EGDEs between them to be smoothed as a whole
3075 TopTools_MapOfShape c1VV;
3077 for ( size_t iS = 0; iS < edgesByGeom.size(); ++iS ) // check FACEs
3079 _EdgesOnShape& eos = edgesByGeom[iS];
3080 if ( eos._edges.empty() ||
3081 eos.ShapeType() != TopAbs_FACE ||
3085 // check EDGEs of a FACE
3086 TopTools_MapOfShape checkedEE, allVV;
3087 list< SMESH_subMesh* > smQueue( 1, eos._subMesh ); // sm of FACEs
3088 while ( !smQueue.empty() )
3090 SMESH_subMesh* sm = smQueue.front();
3091 smQueue.pop_front();
3092 SMESH_subMeshIteratorPtr smIt = sm->getDependsOnIterator(/*includeSelf=*/false);
3093 while ( smIt->more() )
3096 if ( sm->GetSubShape().ShapeType() == TopAbs_VERTEX )
3097 allVV.Add( sm->GetSubShape() );
3098 if ( sm->GetSubShape().ShapeType() != TopAbs_EDGE ||
3099 !checkedEE.Add( sm->GetSubShape() ))
3102 _EdgesOnShape* eoe = data.GetShapeEdges( sm->GetId() );
3103 vector<_LayerEdge*>& eE = eoe->_edges;
3104 if ( eE.empty() || !eoe->_sWOL.IsNull() )
3107 bool isC1 = true; // check continuity along an EDGE
3108 for ( size_t i = 0; i < eE.size() && isC1; ++i )
3109 isC1 = ( Abs( eE[i]->_cosin ) < theMinSmoothCosin );
3113 // check that mesh faces are C1 as well
3115 gp_XYZ norm1, norm2;
3116 const SMDS_MeshNode* n = eE[ eE.size() / 2 ]->_nodes[0];
3117 SMDS_ElemIteratorPtr fIt = n->GetInverseElementIterator(SMDSAbs_Face);
3118 if ( !SMESH_MeshAlgos::FaceNormal( fIt->next(), norm1, /*normalized=*/true ))
3120 while ( fIt->more() && isC1 )
3121 isC1 = ( SMESH_MeshAlgos::FaceNormal( fIt->next(), norm2, /*normalized=*/true ) &&
3122 Abs( norm1 * norm2 ) >= ( 1. - theMinSmoothCosin ));
3127 // add the EDGE and an adjacent FACE to _eosC1
3128 PShapeIteratorPtr fIt = helper.GetAncestors( sm->GetSubShape(), *_mesh, TopAbs_FACE );
3129 while ( const TopoDS_Shape* face = fIt->next() )
3131 _EdgesOnShape* eof = data.GetShapeEdges( *face );
3132 if ( !eof ) continue; // other solid
3133 if ( !eos.HasC1( eoe ))
3135 eos._eosC1.push_back( eoe );
3136 eoe->_toSmooth = false;
3137 data.PrepareEdgesToSmoothOnFace( eoe, /*substituteSrcNodes=*/false );
3139 if ( eos._shapeID != eof->_shapeID && !eos.HasC1( eof ))
3141 eos._eosC1.push_back( eof );
3142 eof->_toSmooth = false;
3143 data.PrepareEdgesToSmoothOnFace( eof, /*substituteSrcNodes=*/false );
3144 smQueue.push_back( eof->_subMesh );
3149 if ( eos._eosC1.empty() )
3152 // check VERTEXes of C1 FACEs
3153 TopTools_MapIteratorOfMapOfShape vIt( allVV );
3154 for ( ; vIt.More(); vIt.Next() )
3156 _EdgesOnShape* eov = data.GetShapeEdges( vIt.Key() );
3157 if ( !eov || eov->_edges.empty() || !eov->_sWOL.IsNull() )
3160 bool isC1 = true; // check if all adjacent FACEs are in eos._eosC1
3161 PShapeIteratorPtr fIt = helper.GetAncestors( vIt.Key(), *_mesh, TopAbs_FACE );
3162 while ( const TopoDS_Shape* face = fIt->next() )
3164 _EdgesOnShape* eof = data.GetShapeEdges( *face );
3165 if ( !eof ) continue; // other solid
3166 isC1 = ( face->IsSame( eos._shape ) || eos.HasC1( eof ));
3172 eos._eosC1.push_back( eov );
3173 data.PrepareEdgesToSmoothOnFace( eov, /*substituteSrcNodes=*/false );
3174 c1VV.Add( eov->_shape );
3178 } // fill _eosC1 of FACEs
3183 vector< pair< _EdgesOnShape*, gp_XYZ > > dirOfEdges;
3185 for ( size_t iS = 0; iS < edgesByGeom.size(); ++iS ) // check VERTEXes
3187 _EdgesOnShape& eov = edgesByGeom[iS];
3188 if ( eov._edges.empty() ||
3189 eov.ShapeType() != TopAbs_VERTEX ||
3190 c1VV.Contains( eov._shape ))
3192 const TopoDS_Vertex& V = TopoDS::Vertex( eov._shape );
3194 // get directions of surrounding EDGEs
3196 PShapeIteratorPtr fIt = helper.GetAncestors( eov._shape, *_mesh, TopAbs_EDGE );
3197 while ( const TopoDS_Shape* e = fIt->next() )
3199 _EdgesOnShape* eoe = data.GetShapeEdges( *e );
3200 if ( !eoe ) continue; // other solid
3201 gp_XYZ eDir = getEdgeDir( TopoDS::Edge( *e ), V );
3202 if ( !Precision::IsInfinite( eDir.X() ))
3203 dirOfEdges.push_back( make_pair( eoe, eDir.Normalized() ));
3206 // find EDGEs with C1 directions
3207 for ( size_t i = 0; i < dirOfEdges.size(); ++i )
3208 for ( size_t j = i+1; j < dirOfEdges.size(); ++j )
3209 if ( dirOfEdges[i].first && dirOfEdges[j].first )
3211 double dot = dirOfEdges[i].second * dirOfEdges[j].second;
3212 bool isC1 = ( dot < - ( 1. - theMinSmoothCosin ));
3215 double maxEdgeLen = 3 * Min( eov._edges[0]->_maxLen, eov._hyp.GetTotalThickness() );
3216 double eLen1 = SMESH_Algo::EdgeLength( TopoDS::Edge( dirOfEdges[i].first->_shape ));
3217 double eLen2 = SMESH_Algo::EdgeLength( TopoDS::Edge( dirOfEdges[j].first->_shape ));
3218 if ( eLen1 < maxEdgeLen ) eov._eosC1.push_back( dirOfEdges[i].first );
3219 if ( eLen2 < maxEdgeLen ) eov._eosC1.push_back( dirOfEdges[j].first );
3220 dirOfEdges[i].first = 0;
3221 dirOfEdges[j].first = 0;
3224 } // fill _eosC1 of VERTEXes
3231 //================================================================================
3233 * \brief initialize data of _EdgesOnShape
3235 //================================================================================
3237 void _ViscousBuilder::setShapeData( _EdgesOnShape& eos,
3241 if ( !eos._shape.IsNull() ||
3242 sm->GetSubShape().ShapeType() == TopAbs_WIRE )
3245 SMESH_MesherHelper helper( *_mesh );
3248 eos._shapeID = sm->GetId();
3249 eos._shape = sm->GetSubShape();
3250 if ( eos.ShapeType() == TopAbs_FACE )
3251 eos._shape.Orientation( helper.GetSubShapeOri( data._solid, eos._shape ));
3252 eos._toSmooth = false;
3256 map< TGeomID, TopoDS_Shape >::const_iterator s2s =
3257 data._shrinkShape2Shape.find( eos._shapeID );
3258 if ( s2s != data._shrinkShape2Shape.end() )
3259 eos._sWOL = s2s->second;
3261 eos._isRegularSWOL = true;
3262 if ( eos.SWOLType() == TopAbs_FACE )
3264 const TopoDS_Face& F = TopoDS::Face( eos._sWOL );
3265 Handle(ShapeAnalysis_Surface) surface = helper.GetSurface( F );
3266 eos._isRegularSWOL = ( ! surface->HasSingularities( 1e-7 ));
3270 if ( data._hyps.size() == 1 )
3272 eos._hyp = data._hyps.back();
3276 // compute average StdMeshers_ViscousLayers parameters
3277 map< TGeomID, const StdMeshers_ViscousLayers* >::iterator f2hyp;
3278 if ( eos.ShapeType() == TopAbs_FACE )
3280 if (( f2hyp = data._face2hyp.find( eos._shapeID )) != data._face2hyp.end() )
3281 eos._hyp = f2hyp->second;
3285 PShapeIteratorPtr fIt = helper.GetAncestors( eos._shape, *_mesh, TopAbs_FACE );
3286 while ( const TopoDS_Shape* face = fIt->next() )
3288 TGeomID faceID = getMeshDS()->ShapeToIndex( *face );
3289 if (( f2hyp = data._face2hyp.find( faceID )) != data._face2hyp.end() )
3290 eos._hyp.Add( f2hyp->second );
3296 if ( ! eos._hyp.UseSurfaceNormal() )
3298 if ( eos.ShapeType() == TopAbs_FACE ) // get normals to elements on a FACE
3300 SMESHDS_SubMesh* smDS = sm->GetSubMeshDS();
3301 eos._faceNormals.resize( smDS->NbElements() );
3303 SMDS_ElemIteratorPtr eIt = smDS->GetElements();
3304 for ( int iF = 0; eIt->more(); ++iF )
3306 const SMDS_MeshElement* face = eIt->next();
3307 if ( !SMESH_MeshAlgos::FaceNormal( face, eos._faceNormals[iF], /*normalized=*/true ))
3308 eos._faceNormals[iF].SetCoord( 0,0,0 );
3311 if ( !helper.IsReversedSubMesh( TopoDS::Face( eos._shape )))
3312 for ( size_t iF = 0; iF < eos._faceNormals.size(); ++iF )
3313 eos._faceNormals[iF].Reverse();
3315 else // find EOS of adjacent FACEs
3317 PShapeIteratorPtr fIt = helper.GetAncestors( eos._shape, *_mesh, TopAbs_FACE );
3318 while ( const TopoDS_Shape* face = fIt->next() )
3320 TGeomID faceID = getMeshDS()->ShapeToIndex( *face );
3321 eos._faceEOS.push_back( & data._edgesOnShape[ faceID ]);
3322 if ( eos._faceEOS.back()->_shape.IsNull() )
3323 // avoid using uninitialised _shapeID in GetNormal()
3324 eos._faceEOS.back()->_shapeID = faceID;
3330 //================================================================================
3332 * \brief Returns normal of a face
3334 //================================================================================
3336 bool _EdgesOnShape::GetNormal( const SMDS_MeshElement* face, gp_Vec& norm )
3339 const _EdgesOnShape* eos = 0;
3341 if ( face->getshapeId() == _shapeID )
3347 for ( size_t iF = 0; iF < _faceEOS.size() && !eos; ++iF )
3348 if ( face->getshapeId() == _faceEOS[ iF ]->_shapeID )
3349 eos = _faceEOS[ iF ];
3353 ( ok = ( face->getIdInShape() < (int) eos->_faceNormals.size() )))
3355 norm = eos->_faceNormals[ face->getIdInShape() ];
3359 debugMsg( "_EdgesOnShape::Normal() failed for face "<<face->GetID()
3360 << " on _shape #" << _shapeID );
3366 //================================================================================
3368 * \brief Set data of _LayerEdge needed for smoothing
3370 //================================================================================
3372 bool _ViscousBuilder::setEdgeData(_LayerEdge& edge,
3374 SMESH_MesherHelper& helper,
3377 const SMDS_MeshNode* node = edge._nodes[0]; // source node
3380 edge._maxLen = Precision::Infinite();
3383 edge._curvature = 0;
3386 // --------------------------
3387 // Compute _normal and _cosin
3388 // --------------------------
3391 edge._lenFactor = 1.;
3392 edge._normal.SetCoord(0,0,0);
3393 _Simplex::GetSimplices( node, edge._simplices, data._ignoreFaceIds, &data );
3395 int totalNbFaces = 0;
3397 std::pair< TopoDS_Face, gp_XYZ > face2Norm[20];
3401 const bool onShrinkShape = !eos._sWOL.IsNull();
3402 const bool useGeometry = (( eos._hyp.UseSurfaceNormal() ) ||
3403 ( eos.ShapeType() != TopAbs_FACE /*&& !onShrinkShape*/ ));
3405 // get geom FACEs the node lies on
3406 //if ( useGeometry )
3408 set<TGeomID> faceIds;
3409 if ( eos.ShapeType() == TopAbs_FACE )
3411 faceIds.insert( eos._shapeID );
3415 SMDS_ElemIteratorPtr fIt = node->GetInverseElementIterator(SMDSAbs_Face);
3416 while ( fIt->more() )
3417 faceIds.insert( fIt->next()->getshapeId() );
3419 set<TGeomID>::iterator id = faceIds.begin();
3420 for ( ; id != faceIds.end(); ++id )
3422 const TopoDS_Shape& s = getMeshDS()->IndexToShape( *id );
3423 if ( s.IsNull() || s.ShapeType() != TopAbs_FACE || data._ignoreFaceIds.count( *id ))
3425 F = TopoDS::Face( s );
3426 face2Norm[ totalNbFaces ].first = F;
3434 bool fromVonF = ( eos.ShapeType() == TopAbs_VERTEX &&
3435 eos.SWOLType() == TopAbs_FACE &&
3438 if ( onShrinkShape && !fromVonF ) // one of faces the node is on has no layers
3440 if ( eos.SWOLType() == TopAbs_EDGE )
3442 // inflate from VERTEX along EDGE
3443 edge._normal = getEdgeDir( TopoDS::Edge( eos._sWOL ), TopoDS::Vertex( eos._shape ));
3445 else if ( eos.ShapeType() == TopAbs_VERTEX )
3447 // inflate from VERTEX along FACE
3448 edge._normal = getFaceDir( TopoDS::Face( eos._sWOL ), TopoDS::Vertex( eos._shape ),
3449 node, helper, normOK, &edge._cosin);
3453 // inflate from EDGE along FACE
3454 edge._normal = getFaceDir( TopoDS::Face( eos._sWOL ), TopoDS::Edge( eos._shape ),
3455 node, helper, normOK);
3458 else // layers are on all FACEs of SOLID the node is on (or fromVonF)
3461 face2Norm[ totalNbFaces++ ].first = TopoDS::Face( eos._sWOL );
3464 for ( int iF = totalNbFaces - 1; iF >= 0; --iF )
3466 F = face2Norm[ iF ].first;
3467 geomNorm = getFaceNormal( node, F, helper, normOK );
3468 if ( !normOK ) continue;
3471 if ( helper.GetSubShapeOri( data._solid, F ) != TopAbs_REVERSED )
3473 face2Norm[ iF ].second = geomNorm.XYZ();
3474 edge._normal += geomNorm.XYZ();
3476 if ( nbOkNorms == 0 )
3477 return error(SMESH_Comment("Can't get normal to node ") << node->GetID(), data._index);
3479 if ( totalNbFaces >= 3 )
3481 edge._normal = getNormalByOffset( &edge, face2Norm, totalNbFaces, fromVonF );
3484 if ( edge._normal.Modulus() < 1e-3 && nbOkNorms > 1 )
3486 // opposite normals, re-get normals at shifted positions (IPAL 52426)
3487 edge._normal.SetCoord( 0,0,0 );
3488 for ( int iF = 0; iF < totalNbFaces - fromVonF; ++iF )
3490 const TopoDS_Face& F = face2Norm[iF].first;
3491 geomNorm = getFaceNormal( node, F, helper, normOK, /*shiftInside=*/true );
3492 if ( helper.GetSubShapeOri( data._solid, F ) != TopAbs_REVERSED )
3495 face2Norm[ iF ].second = geomNorm.XYZ();
3496 edge._normal += face2Norm[ iF ].second;
3501 else // !useGeometry - get _normal using surrounding mesh faces
3503 edge._normal = getWeigthedNormal( &edge );
3505 // set<TGeomID> faceIds;
3507 // SMDS_ElemIteratorPtr fIt = node->GetInverseElementIterator(SMDSAbs_Face);
3508 // while ( fIt->more() )
3510 // const SMDS_MeshElement* face = fIt->next();
3511 // if ( eos.GetNormal( face, geomNorm ))
3513 // if ( onShrinkShape && !faceIds.insert( face->getshapeId() ).second )
3514 // continue; // use only one mesh face on FACE
3515 // edge._normal += geomNorm.XYZ();
3522 //if ( eos._hyp.UseSurfaceNormal() )
3524 switch ( eos.ShapeType() )
3531 TopoDS_Edge E = TopoDS::Edge( eos._shape );
3532 gp_Vec inFaceDir = getFaceDir( F, E, node, helper, normOK );
3533 double angle = inFaceDir.Angle( edge._normal ); // [0,PI]
3534 edge._cosin = Cos( angle );
3537 case TopAbs_VERTEX: {
3538 //if ( eos.SWOLType() != TopAbs_FACE ) // else _cosin is set by getFaceDir()
3540 TopoDS_Vertex V = TopoDS::Vertex( eos._shape );
3541 gp_Vec inFaceDir = getFaceDir( F, V, node, helper, normOK );
3542 double angle = inFaceDir.Angle( edge._normal ); // [0,PI]
3543 edge._cosin = Cos( angle );
3544 if ( totalNbFaces > 2 || helper.IsSeamShape( node->getshapeId() ))
3545 for ( int iF = totalNbFaces-2; iF >=0; --iF )
3547 F = face2Norm[ iF ].first;
3548 inFaceDir = getFaceDir( F, V, node, helper, normOK=true );
3550 double angle = inFaceDir.Angle( edge._normal );
3551 double cosin = Cos( angle );
3552 if ( Abs( cosin ) > Abs( edge._cosin ))
3553 edge._cosin = cosin;
3560 return error(SMESH_Comment("Invalid shape position of node ")<<node, data._index);
3564 double normSize = edge._normal.SquareModulus();
3565 if ( normSize < numeric_limits<double>::min() )
3566 return error(SMESH_Comment("Bad normal at node ")<< node->GetID(), data._index );
3568 edge._normal /= sqrt( normSize );
3570 if ( edge.Is( _LayerEdge::MULTI_NORMAL ) && edge._nodes.size() == 2 )
3572 getMeshDS()->RemoveFreeNode( edge._nodes.back(), 0, /*fromGroups=*/false );
3573 edge._nodes.resize( 1 );
3574 edge._normal.SetCoord( 0,0,0 );
3578 // Set the rest data
3579 // --------------------
3581 edge.SetCosin( edge._cosin ); // to update edge._lenFactor
3583 if ( onShrinkShape )
3585 const SMDS_MeshNode* tgtNode = edge._nodes.back();
3586 if ( SMESHDS_SubMesh* sm = getMeshDS()->MeshElements( data._solid ))
3587 sm->RemoveNode( tgtNode , /*isNodeDeleted=*/false );
3589 // set initial position which is parameters on _sWOL in this case
3590 if ( eos.SWOLType() == TopAbs_EDGE )
3592 double u = helper.GetNodeU( TopoDS::Edge( eos._sWOL ), node, 0, &normOK );
3593 edge._pos.push_back( gp_XYZ( u, 0, 0 ));
3594 if ( edge._nodes.size() > 1 )
3595 getMeshDS()->SetNodeOnEdge( tgtNode, TopoDS::Edge( eos._sWOL ), u );
3597 else // eos.SWOLType() == TopAbs_FACE
3599 gp_XY uv = helper.GetNodeUV( TopoDS::Face( eos._sWOL ), node, 0, &normOK );
3600 edge._pos.push_back( gp_XYZ( uv.X(), uv.Y(), 0));
3601 if ( edge._nodes.size() > 1 )
3602 getMeshDS()->SetNodeOnFace( tgtNode, TopoDS::Face( eos._sWOL ), uv.X(), uv.Y() );
3605 if ( edge._nodes.size() > 1 )
3607 // check if an angle between a FACE with layers and SWOL is sharp,
3608 // else the edge should not inflate
3610 for ( int iF = 0; iF < totalNbFaces && F.IsNull(); ++iF ) // find a FACE with VL
3611 if ( ! helper.IsSubShape( eos._sWOL, face2Norm[iF].first ))
3612 F = face2Norm[iF].first;
3615 geomNorm = getFaceNormal( node, F, helper, normOK );
3616 if ( helper.GetSubShapeOri( data._solid, F ) != TopAbs_REVERSED )
3617 geomNorm.Reverse(); // inside the SOLID
3618 if ( geomNorm * edge._normal < -0.001 )
3620 getMeshDS()->RemoveFreeNode( tgtNode, 0, /*fromGroups=*/false );
3621 edge._nodes.resize( 1 );
3623 else if ( edge._lenFactor > 3 )
3625 edge._lenFactor = 2;
3626 edge.Set( _LayerEdge::RISKY_SWOL );
3633 edge._pos.push_back( SMESH_TNodeXYZ( node ));
3635 if ( eos.ShapeType() == TopAbs_FACE )
3638 for ( size_t i = 0; i < edge._simplices.size(); ++i )
3640 edge._simplices[i].IsMinAngleOK( edge._pos.back(), angle );
3641 edge._minAngle = Max( edge._minAngle, angle ); // "angle" is actually cosine
3646 // Set neighbor nodes for a _LayerEdge based on EDGE
3648 if ( eos.ShapeType() == TopAbs_EDGE /*||
3649 ( onShrinkShape && posType == SMDS_TOP_VERTEX && fabs( edge._cosin ) < 1e-10 )*/)
3651 edge._2neibors = new _2NearEdges;
3652 // target nodes instead of source ones will be set later
3658 //================================================================================
3660 * \brief Return normal to a FACE at a node
3661 * \param [in] n - node
3662 * \param [in] face - FACE
3663 * \param [in] helper - helper
3664 * \param [out] isOK - true or false
3665 * \param [in] shiftInside - to find normal at a position shifted inside the face
3666 * \return gp_XYZ - normal
3668 //================================================================================
3670 gp_XYZ _ViscousBuilder::getFaceNormal(const SMDS_MeshNode* node,
3671 const TopoDS_Face& face,
3672 SMESH_MesherHelper& helper,
3679 // get a shifted position
3680 gp_Pnt p = SMESH_TNodeXYZ( node );
3681 gp_XYZ shift( 0,0,0 );
3682 TopoDS_Shape S = helper.GetSubShapeByNode( node, helper.GetMeshDS() );
3683 switch ( S.ShapeType() ) {
3686 shift = getFaceDir( face, TopoDS::Vertex( S ), node, helper, isOK );
3691 shift = getFaceDir( face, TopoDS::Edge( S ), node, helper, isOK );
3699 p.Translate( shift * 1e-5 );
3701 TopLoc_Location loc;
3702 GeomAPI_ProjectPointOnSurf& projector = helper.GetProjector( face, loc, 1e-7 );
3704 if ( !loc.IsIdentity() ) p.Transform( loc.Transformation().Inverted() );
3706 projector.Perform( p );
3707 if ( !projector.IsDone() || projector.NbPoints() < 1 )
3712 Quantity_Parameter U,V;
3713 projector.LowerDistanceParameters(U,V);
3718 uv = helper.GetNodeUV( face, node, 0, &isOK );
3724 Handle(Geom_Surface) surface = BRep_Tool::Surface( face );
3726 if ( !shiftInside &&
3727 helper.IsDegenShape( node->getshapeId() ) &&
3728 getFaceNormalAtSingularity( uv, face, helper, normal ))
3731 return normal.XYZ();
3734 int pointKind = GeomLib::NormEstim( surface, uv, 1e-5, normal );
3735 enum { REGULAR = 0, QUASYSINGULAR, CONICAL, IMPOSSIBLE };
3737 if ( pointKind == IMPOSSIBLE &&
3738 node->GetPosition()->GetDim() == 2 ) // node inside the FACE
3740 // probably NormEstim() failed due to a too high tolerance
3741 pointKind = GeomLib::NormEstim( surface, uv, 1e-20, normal );
3742 isOK = ( pointKind < IMPOSSIBLE );
3744 if ( pointKind < IMPOSSIBLE )
3746 if ( pointKind != REGULAR &&
3748 node->GetPosition()->GetDim() < 2 ) // FACE boundary
3750 gp_XYZ normShift = getFaceNormal( node, face, helper, isOK, /*shiftInside=*/true );
3751 if ( normShift * normal.XYZ() < 0. )
3757 if ( !isOK ) // hard singularity, to call with shiftInside=true ?
3759 const TGeomID faceID = helper.GetMeshDS()->ShapeToIndex( face );
3761 SMDS_ElemIteratorPtr fIt = node->GetInverseElementIterator(SMDSAbs_Face);
3762 while ( fIt->more() )
3764 const SMDS_MeshElement* f = fIt->next();
3765 if ( f->getshapeId() == faceID )
3767 isOK = SMESH_MeshAlgos::FaceNormal( f, (gp_XYZ&) normal.XYZ(), /*normalized=*/true );
3770 TopoDS_Face ff = face;
3771 ff.Orientation( TopAbs_FORWARD );
3772 if ( helper.IsReversedSubMesh( ff ))
3779 return normal.XYZ();
3782 //================================================================================
3784 * \brief Try to get normal at a singularity of a surface basing on it's nature
3786 //================================================================================
3788 bool _ViscousBuilder::getFaceNormalAtSingularity( const gp_XY& uv,
3789 const TopoDS_Face& face,
3790 SMESH_MesherHelper& helper,
3793 BRepAdaptor_Surface surface( face );
3795 if ( !getRovolutionAxis( surface, axis ))
3798 double f,l, d, du, dv;
3799 f = surface.FirstUParameter();
3800 l = surface.LastUParameter();
3801 d = ( uv.X() - f ) / ( l - f );
3802 du = ( d < 0.5 ? +1. : -1 ) * 1e-5 * ( l - f );
3803 f = surface.FirstVParameter();
3804 l = surface.LastVParameter();
3805 d = ( uv.Y() - f ) / ( l - f );
3806 dv = ( d < 0.5 ? +1. : -1 ) * 1e-5 * ( l - f );
3809 gp_Pnt2d testUV = uv;
3810 enum { REGULAR = 0, QUASYSINGULAR, CONICAL, IMPOSSIBLE };
3812 Handle(Geom_Surface) geomsurf = surface.Surface().Surface();
3813 for ( int iLoop = 0; true ; ++iLoop )
3815 testUV.SetCoord( testUV.X() + du, testUV.Y() + dv );
3816 if ( GeomLib::NormEstim( geomsurf, testUV, tol, refDir ) == REGULAR )
3823 if ( axis * refDir < 0. )
3831 //================================================================================
3833 * \brief Return a normal at a node weighted with angles taken by faces
3835 //================================================================================
3837 gp_XYZ _ViscousBuilder::getWeigthedNormal( const _LayerEdge* edge )
3839 const SMDS_MeshNode* n = edge->_nodes[0];
3841 gp_XYZ resNorm(0,0,0);
3842 SMESH_TNodeXYZ p0( n ), pP, pN;
3843 for ( size_t i = 0; i < edge->_simplices.size(); ++i )
3845 pP.Set( edge->_simplices[i]._nPrev );
3846 pN.Set( edge->_simplices[i]._nNext );
3847 gp_Vec v0P( p0, pP ), v0N( p0, pN ), vPN( pP, pN ), norm = v0P ^ v0N;
3848 double l0P = v0P.SquareMagnitude();
3849 double l0N = v0N.SquareMagnitude();
3850 double lPN = vPN.SquareMagnitude();
3851 if ( l0P < std::numeric_limits<double>::min() ||
3852 l0N < std::numeric_limits<double>::min() ||
3853 lPN < std::numeric_limits<double>::min() )
3855 double lNorm = norm.SquareMagnitude();
3856 double sin2 = lNorm / l0P / l0N;
3857 double angle = ACos(( v0P * v0N ) / Sqrt( l0P ) / Sqrt( l0N ));
3859 double weight = sin2 * angle / lPN;
3860 resNorm += weight * norm.XYZ() / Sqrt( lNorm );
3866 //================================================================================
3868 * \brief Return a normal at a node by getting a common point of offset planes
3869 * defined by the FACE normals
3871 //================================================================================
3873 gp_XYZ _ViscousBuilder::getNormalByOffset( _LayerEdge* edge,
3874 std::pair< TopoDS_Face, gp_XYZ > f2Normal[],
3878 SMESH_TNodeXYZ p0 = edge->_nodes[0];
3880 gp_XYZ resNorm(0,0,0);
3881 TopoDS_Shape V = SMESH_MesherHelper::GetSubShapeByNode( p0._node, getMeshDS() );
3882 if ( V.ShapeType() != TopAbs_VERTEX || nbFaces < 3 )
3884 for ( int i = 0; i < nbFaces; ++i )
3885 resNorm += f2Normal[i].second;
3889 // prepare _OffsetPlane's
3890 vector< _OffsetPlane > pln( nbFaces );
3891 for ( int i = 0; i < nbFaces - lastNoOffset; ++i )
3893 pln[i]._faceIndex = i;
3894 pln[i]._plane = gp_Pln( p0 + f2Normal[i].second, f2Normal[i].second );
3898 pln[ nbFaces - 1 ]._faceIndex = nbFaces - 1;
3899 pln[ nbFaces - 1 ]._plane = gp_Pln( p0, f2Normal[ nbFaces - 1 ].second );
3902 // intersect neighboring OffsetPlane's
3903 PShapeIteratorPtr edgeIt = SMESH_MesherHelper::GetAncestors( V, *_mesh, TopAbs_EDGE );
3904 while ( const TopoDS_Shape* edge = edgeIt->next() )
3906 int f1 = -1, f2 = -1;
3907 for ( int i = 0; i < nbFaces && f2 < 0; ++i )
3908 if ( SMESH_MesherHelper::IsSubShape( *edge, f2Normal[i].first ))
3909 (( f1 < 0 ) ? f1 : f2 ) = i;
3912 pln[ f1 ].ComputeIntersectionLine( pln[ f2 ], TopoDS::Edge( *edge ), TopoDS::Vertex( V ));
3915 // get a common point
3916 gp_XYZ commonPnt( 0, 0, 0 );
3919 for ( int i = 0; i < nbFaces; ++i )
3921 commonPnt += pln[ i ].GetCommonPoint( isPointFound, TopoDS::Vertex( V ));
3922 nbPoints += isPointFound;
3924 gp_XYZ wgtNorm = getWeigthedNormal( edge );
3925 if ( nbPoints == 0 )
3928 commonPnt /= nbPoints;
3929 resNorm = commonPnt - p0;
3933 // choose the best among resNorm and wgtNorm
3934 resNorm.Normalize();
3935 wgtNorm.Normalize();
3936 double resMinDot = std::numeric_limits<double>::max();
3937 double wgtMinDot = std::numeric_limits<double>::max();
3938 for ( int i = 0; i < nbFaces - lastNoOffset; ++i )
3940 resMinDot = Min( resMinDot, resNorm * f2Normal[i].second );
3941 wgtMinDot = Min( wgtMinDot, wgtNorm * f2Normal[i].second );
3944 if ( Max( resMinDot, wgtMinDot ) < theMinSmoothCosin )
3946 edge->Set( _LayerEdge::MULTI_NORMAL );
3949 return ( resMinDot > wgtMinDot ) ? resNorm : wgtNorm;
3952 //================================================================================
3954 * \brief Compute line of intersection of 2 planes
3956 //================================================================================
3958 void _OffsetPlane::ComputeIntersectionLine( _OffsetPlane& pln,
3959 const TopoDS_Edge& E,
3960 const TopoDS_Vertex& V )
3962 int iNext = bool( _faceIndexNext[0] >= 0 );
3963 _faceIndexNext[ iNext ] = pln._faceIndex;
3965 gp_XYZ n1 = _plane.Axis().Direction().XYZ();
3966 gp_XYZ n2 = pln._plane.Axis().Direction().XYZ();
3968 gp_XYZ lineDir = n1 ^ n2;
3970 double x = Abs( lineDir.X() );
3971 double y = Abs( lineDir.Y() );
3972 double z = Abs( lineDir.Z() );
3974 int cooMax; // max coordinate
3976 if (x > z) cooMax = 1;
3980 if (y > z) cooMax = 2;
3985 if ( Abs( lineDir.Coord( cooMax )) < 0.05 )
3987 // parallel planes - intersection is an offset of the common EDGE
3988 gp_Pnt p = BRep_Tool::Pnt( V );
3989 linePos = 0.5 * (( p.XYZ() + n1 ) + ( p.XYZ() + n2 ));
3990 lineDir = getEdgeDir( E, V );
3994 // the constants in the 2 plane equations
3995 double d1 = - ( _plane.Axis().Direction().XYZ() * _plane.Location().XYZ() );
3996 double d2 = - ( pln._plane.Axis().Direction().XYZ() * pln._plane.Location().XYZ() );
4001 linePos.SetY(( d2*n1.Z() - d1*n2.Z()) / lineDir.X() );
4002 linePos.SetZ(( d1*n2.Y() - d2*n1.Y()) / lineDir.X() );
4005 linePos.SetX(( d1*n2.Z() - d2*n1.Z()) / lineDir.Y() );
4007 linePos.SetZ(( d2*n1.X() - d1*n2.X()) / lineDir.Y() );
4010 linePos.SetX(( d2*n1.Y() - d1*n2.Y()) / lineDir.Z() );
4011 linePos.SetY(( d1*n2.X() - d2*n1.X()) / lineDir.Z() );
4015 gp_Lin& line = _lines[ iNext ];
4016 line.SetDirection( lineDir );
4017 line.SetLocation ( linePos );
4019 _isLineOK[ iNext ] = true;
4022 iNext = bool( pln._faceIndexNext[0] >= 0 );
4023 pln._lines [ iNext ] = line;
4024 pln._faceIndexNext[ iNext ] = this->_faceIndex;
4025 pln._isLineOK [ iNext ] = true;
4028 //================================================================================
4030 * \brief Computes intersection point of two _lines
4032 //================================================================================
4034 gp_XYZ _OffsetPlane::GetCommonPoint(bool& isFound,
4035 const TopoDS_Vertex & V) const
4040 if ( NbLines() == 2 )
4042 gp_Vec lPerp0 = _lines[0].Direction().XYZ() ^ _plane.Axis().Direction().XYZ();
4043 double dot01 = lPerp0 * _lines[1].Direction().XYZ();
4044 if ( Abs( dot01 ) > 0.05 )
4046 gp_Vec l0l1 = _lines[1].Location().XYZ() - _lines[0].Location().XYZ();
4047 double u1 = - ( lPerp0 * l0l1 ) / dot01;
4048 p = ( _lines[1].Location().XYZ() + _lines[1].Direction().XYZ() * u1 );
4053 gp_Pnt pV ( BRep_Tool::Pnt( V ));
4054 gp_Vec lv0( _lines[0].Location(), pV ), lv1(_lines[1].Location(), pV );
4055 double dot0( lv0 * _lines[0].Direction() ), dot1( lv1 * _lines[1].Direction() );
4056 p += 0.5 * ( _lines[0].Location().XYZ() + _lines[0].Direction().XYZ() * dot0 );
4057 p += 0.5 * ( _lines[1].Location().XYZ() + _lines[1].Direction().XYZ() * dot1 );
4065 //================================================================================
4067 * \brief Find 2 neigbor nodes of a node on EDGE
4069 //================================================================================
4071 bool _ViscousBuilder::findNeiborsOnEdge(const _LayerEdge* edge,
4072 const SMDS_MeshNode*& n1,
4073 const SMDS_MeshNode*& n2,
4077 const SMDS_MeshNode* node = edge->_nodes[0];
4078 const int shapeInd = eos._shapeID;
4079 SMESHDS_SubMesh* edgeSM = 0;
4080 if ( eos.ShapeType() == TopAbs_EDGE )
4082 edgeSM = eos._subMesh->GetSubMeshDS();
4083 if ( !edgeSM || edgeSM->NbElements() == 0 )
4084 return error(SMESH_Comment("Not meshed EDGE ") << shapeInd, data._index);
4088 SMDS_ElemIteratorPtr eIt = node->GetInverseElementIterator(SMDSAbs_Edge);
4089 while ( eIt->more() && !n2 )
4091 const SMDS_MeshElement* e = eIt->next();
4092 const SMDS_MeshNode* nNeibor = e->GetNode( 0 );
4093 if ( nNeibor == node ) nNeibor = e->GetNode( 1 );
4096 if (!edgeSM->Contains(e)) continue;
4100 TopoDS_Shape s = SMESH_MesherHelper::GetSubShapeByNode( nNeibor, getMeshDS() );
4101 if ( !SMESH_MesherHelper::IsSubShape( s, eos._sWOL )) continue;
4103 ( iN++ ? n2 : n1 ) = nNeibor;
4106 return error(SMESH_Comment("Wrongly meshed EDGE ") << shapeInd, data._index);
4110 //================================================================================
4112 * \brief Set _curvature and _2neibors->_plnNorm by 2 neigbor nodes residing the same EDGE
4114 //================================================================================
4116 void _LayerEdge::SetDataByNeighbors( const SMDS_MeshNode* n1,
4117 const SMDS_MeshNode* n2,
4118 const _EdgesOnShape& eos,
4119 SMESH_MesherHelper& helper)
4121 if ( eos.ShapeType() != TopAbs_EDGE )
4124 gp_XYZ pos = SMESH_TNodeXYZ( _nodes[0] );
4125 gp_XYZ vec1 = pos - SMESH_TNodeXYZ( n1 );
4126 gp_XYZ vec2 = pos - SMESH_TNodeXYZ( n2 );
4130 double sumLen = vec1.Modulus() + vec2.Modulus();
4131 _2neibors->_wgt[0] = 1 - vec1.Modulus() / sumLen;
4132 _2neibors->_wgt[1] = 1 - vec2.Modulus() / sumLen;
4133 double avgNormProj = 0.5 * ( _normal * vec1 + _normal * vec2 );
4134 double avgLen = 0.5 * ( vec1.Modulus() + vec2.Modulus() );
4135 if ( _curvature ) delete _curvature;
4136 _curvature = _Curvature::New( avgNormProj, avgLen );
4137 // if ( _curvature )
4138 // debugMsg( _nodes[0]->GetID()
4139 // << " CURV r,k: " << _curvature->_r<<","<<_curvature->_k
4140 // << " proj = "<<avgNormProj<< " len = " << avgLen << "| lenDelta(0) = "
4141 // << _curvature->lenDelta(0) );
4145 if ( eos._sWOL.IsNull() )
4147 TopoDS_Edge E = TopoDS::Edge( eos._shape );
4148 // if ( SMESH_Algo::isDegenerated( E ))
4150 gp_XYZ dirE = getEdgeDir( E, _nodes[0], helper );
4151 gp_XYZ plnNorm = dirE ^ _normal;
4152 double proj0 = plnNorm * vec1;
4153 double proj1 = plnNorm * vec2;
4154 if ( fabs( proj0 ) > 1e-10 || fabs( proj1 ) > 1e-10 )
4156 if ( _2neibors->_plnNorm ) delete _2neibors->_plnNorm;
4157 _2neibors->_plnNorm = new gp_XYZ( plnNorm.Normalized() );
4162 //================================================================================
4164 * \brief Copy data from a _LayerEdge of other SOLID and based on the same node;
4165 * this and the other _LayerEdge are inflated along a FACE or an EDGE
4167 //================================================================================
4169 gp_XYZ _LayerEdge::Copy( _LayerEdge& other,
4171 SMESH_MesherHelper& helper )
4173 _nodes = other._nodes;
4174 _normal = other._normal;
4176 _lenFactor = other._lenFactor;
4177 _cosin = other._cosin;
4178 _2neibors = other._2neibors;
4179 _curvature = 0; std::swap( _curvature, other._curvature );
4180 _2neibors = 0; std::swap( _2neibors, other._2neibors );
4182 gp_XYZ lastPos( 0,0,0 );
4183 if ( eos.SWOLType() == TopAbs_EDGE )
4185 double u = helper.GetNodeU( TopoDS::Edge( eos._sWOL ), _nodes[0] );
4186 _pos.push_back( gp_XYZ( u, 0, 0));
4188 u = helper.GetNodeU( TopoDS::Edge( eos._sWOL ), _nodes.back() );
4193 gp_XY uv = helper.GetNodeUV( TopoDS::Face( eos._sWOL ), _nodes[0]);
4194 _pos.push_back( gp_XYZ( uv.X(), uv.Y(), 0));
4196 uv = helper.GetNodeUV( TopoDS::Face( eos._sWOL ), _nodes.back() );
4197 lastPos.SetX( uv.X() );
4198 lastPos.SetY( uv.Y() );
4203 //================================================================================
4205 * \brief Set _cosin and _lenFactor
4207 //================================================================================
4209 void _LayerEdge::SetCosin( double cosin )
4212 cosin = Abs( _cosin );
4213 //_lenFactor = ( cosin < 1.-1e-12 ) ? Min( 2., 1./sqrt(1-cosin*cosin )) : 1.0;
4214 _lenFactor = ( cosin < 1.-1e-12 ) ? 1./sqrt(1-cosin*cosin ) : 1.0;
4217 //================================================================================
4219 * \brief Check if another _LayerEdge is a neighbor on EDGE
4221 //================================================================================
4223 bool _LayerEdge::IsNeiborOnEdge( const _LayerEdge* edge ) const
4225 return (( this->_2neibors && this->_2neibors->include( edge )) ||
4226 ( edge->_2neibors && edge->_2neibors->include( this )));
4229 //================================================================================
4231 * \brief Fills a vector<_Simplex >
4233 //================================================================================
4235 void _Simplex::GetSimplices( const SMDS_MeshNode* node,
4236 vector<_Simplex>& simplices,
4237 const set<TGeomID>& ingnoreShapes,
4238 const _SolidData* dataToCheckOri,
4242 SMDS_ElemIteratorPtr fIt = node->GetInverseElementIterator(SMDSAbs_Face);
4243 while ( fIt->more() )
4245 const SMDS_MeshElement* f = fIt->next();
4246 const TGeomID shapeInd = f->getshapeId();
4247 if ( ingnoreShapes.count( shapeInd )) continue;
4248 const int nbNodes = f->NbCornerNodes();
4249 const int srcInd = f->GetNodeIndex( node );
4250 const SMDS_MeshNode* nPrev = f->GetNode( SMESH_MesherHelper::WrapIndex( srcInd-1, nbNodes ));
4251 const SMDS_MeshNode* nNext = f->GetNode( SMESH_MesherHelper::WrapIndex( srcInd+1, nbNodes ));
4252 const SMDS_MeshNode* nOpp = f->GetNode( SMESH_MesherHelper::WrapIndex( srcInd+2, nbNodes ));
4253 if ( dataToCheckOri && dataToCheckOri->_reversedFaceIds.count( shapeInd ))
4254 std::swap( nPrev, nNext );
4255 simplices.push_back( _Simplex( nPrev, nNext, ( nbNodes == 3 ? 0 : nOpp )));
4259 SortSimplices( simplices );
4262 //================================================================================
4264 * \brief Set neighbor simplices side by side
4266 //================================================================================
4268 void _Simplex::SortSimplices(vector<_Simplex>& simplices)
4270 vector<_Simplex> sortedSimplices( simplices.size() );
4271 sortedSimplices[0] = simplices[0];
4273 for ( size_t i = 1; i < simplices.size(); ++i )
4275 for ( size_t j = 1; j < simplices.size(); ++j )
4276 if ( sortedSimplices[i-1]._nNext == simplices[j]._nPrev )
4278 sortedSimplices[i] = simplices[j];
4283 if ( nbFound == simplices.size() - 1 )
4284 simplices.swap( sortedSimplices );
4287 //================================================================================
4289 * \brief DEBUG. Create groups contating temorary data of _LayerEdge's
4291 //================================================================================
4293 void _ViscousBuilder::makeGroupOfLE()
4296 for ( size_t i = 0 ; i < _sdVec.size(); ++i )
4298 if ( _sdVec[i]._n2eMap.empty() ) continue;
4300 dumpFunction( SMESH_Comment("make_LayerEdge_") << i );
4301 TNode2Edge::iterator n2e;
4302 for ( n2e = _sdVec[i]._n2eMap.begin(); n2e != _sdVec[i]._n2eMap.end(); ++n2e )
4304 _LayerEdge* le = n2e->second;
4305 // for ( size_t iN = 1; iN < le->_nodes.size(); ++iN )
4306 // dumpCmd(SMESH_Comment("mesh.AddEdge([ ") <<le->_nodes[iN-1]->GetID()
4307 // << ", " << le->_nodes[iN]->GetID() <<"])");
4309 dumpCmd(SMESH_Comment("mesh.AddEdge([ ") <<le->_nodes[0]->GetID()
4310 << ", " << le->_nodes.back()->GetID() <<"]) # " << le->_flags );
4315 dumpFunction( SMESH_Comment("makeNormals") << i );
4316 for ( n2e = _sdVec[i]._n2eMap.begin(); n2e != _sdVec[i]._n2eMap.end(); ++n2e )
4318 _LayerEdge* edge = n2e->second;
4319 SMESH_TNodeXYZ nXYZ( edge->_nodes[0] );
4320 nXYZ += edge->_normal * _sdVec[i]._stepSize;
4321 dumpCmd(SMESH_Comment("mesh.AddEdge([ ") << edge->_nodes[0]->GetID()
4322 << ", mesh.AddNode( "<< nXYZ.X()<<","<< nXYZ.Y()<<","<< nXYZ.Z()<<")])");
4326 dumpFunction( SMESH_Comment("makeTmpFaces_") << i );
4327 dumpCmd( "faceId1 = mesh.NbElements()" );
4328 TopExp_Explorer fExp( _sdVec[i]._solid, TopAbs_FACE );
4329 for ( ; fExp.More(); fExp.Next() )
4331 if ( const SMESHDS_SubMesh* sm = _sdVec[i]._proxyMesh->GetProxySubMesh( fExp.Current() ))
4333 if ( sm->NbElements() == 0 ) continue;
4334 SMDS_ElemIteratorPtr fIt = sm->GetElements();
4335 while ( fIt->more())
4337 const SMDS_MeshElement* e = fIt->next();
4338 SMESH_Comment cmd("mesh.AddFace([");
4339 for ( int j = 0; j < e->NbCornerNodes(); ++j )
4340 cmd << e->GetNode(j)->GetID() << (j+1 < e->NbCornerNodes() ? ",": "])");
4345 dumpCmd( "faceId2 = mesh.NbElements()" );
4346 dumpCmd( SMESH_Comment( "mesh.MakeGroup( 'tmpFaces_" ) << i << "',"
4347 << "SMESH.FACE, SMESH.FT_RangeOfIds,'=',"
4348 << "'%s-%s' % (faceId1+1, faceId2))");
4354 //================================================================================
4356 * \brief Find maximal _LayerEdge length (layer thickness) limited by geometry
4358 //================================================================================
4360 void _ViscousBuilder::computeGeomSize( _SolidData& data )
4362 data._geomSize = Precision::Infinite();
4363 double intersecDist;
4364 const SMDS_MeshElement* face;
4365 SMESH_MesherHelper helper( *_mesh );
4367 SMESHUtils::Deleter<SMESH_ElementSearcher> searcher
4368 ( SMESH_MeshAlgos::GetElementSearcher( *getMeshDS(),
4369 data._proxyMesh->GetFaces( data._solid )));
4371 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
4373 _EdgesOnShape& eos = data._edgesOnShape[ iS ];
4374 if ( eos._edges.empty() )
4376 // get neighbor faces intersection with which should not be considered since
4377 // collisions are avoided by means of smoothing
4378 set< TGeomID > neighborFaces;
4379 if ( eos._hyp.ToSmooth() )
4381 SMESH_subMeshIteratorPtr subIt =
4382 eos._subMesh->getDependsOnIterator(/*includeSelf=*/eos.ShapeType() != TopAbs_FACE );
4383 while ( subIt->more() )
4385 SMESH_subMesh* sm = subIt->next();
4386 PShapeIteratorPtr fIt = helper.GetAncestors( sm->GetSubShape(), *_mesh, TopAbs_FACE );
4387 while ( const TopoDS_Shape* face = fIt->next() )
4388 neighborFaces.insert( getMeshDS()->ShapeToIndex( *face ));
4391 // find intersections
4392 double thinkness = eos._hyp.GetTotalThickness();
4393 for ( size_t i = 0; i < eos._edges.size(); ++i )
4395 if ( eos._edges[i]->Is( _LayerEdge::BLOCKED )) continue;
4396 eos._edges[i]->_maxLen = thinkness;
4397 eos._edges[i]->FindIntersection( *searcher, intersecDist, data._epsilon, eos, &face );
4398 if ( intersecDist > 0 && face )
4400 data._geomSize = Min( data._geomSize, intersecDist );
4401 if ( !neighborFaces.count( face->getshapeId() ))
4402 eos._edges[i]->_maxLen = Min( thinkness, intersecDist / ( face->GetID() < 0 ? 3. : 2. ));
4408 //================================================================================
4410 * \brief Increase length of _LayerEdge's to reach the required thickness of layers
4412 //================================================================================
4414 bool _ViscousBuilder::inflate(_SolidData& data)
4416 SMESH_MesherHelper helper( *_mesh );
4418 // Limit inflation step size by geometry size found by itersecting
4419 // normals of _LayerEdge's with mesh faces
4420 if ( data._stepSize > 0.3 * data._geomSize )
4421 limitStepSize( data, 0.3 * data._geomSize );
4423 const double tgtThick = data._maxThickness;
4424 if ( data._stepSize > data._minThickness )
4425 limitStepSize( data, data._minThickness );
4427 if ( data._stepSize < 1. )
4428 data._epsilon = data._stepSize * 1e-7;
4430 debugMsg( "-- geomSize = " << data._geomSize << ", stepSize = " << data._stepSize );
4432 findCollisionEdges( data, helper );
4434 limitMaxLenByCurvature( data, helper );
4436 // limit length of _LayerEdge's around MULTI_NORMAL _LayerEdge's
4437 for ( size_t i = 0; i < data._edgesOnShape.size(); ++i )
4438 if ( data._edgesOnShape[i].ShapeType() == TopAbs_VERTEX &&
4439 data._edgesOnShape[i]._edges.size() > 0 &&
4440 data._edgesOnShape[i]._edges[0]->Is( _LayerEdge::MULTI_NORMAL ))
4442 data._edgesOnShape[i]._edges[0]->Unset( _LayerEdge::BLOCKED );
4443 data._edgesOnShape[i]._edges[0]->Block( data );
4446 const double safeFactor = ( 2*data._maxThickness < data._geomSize ) ? 1 : theThickToIntersection;
4448 double avgThick = 0, curThick = 0, distToIntersection = Precision::Infinite();
4449 int nbSteps = 0, nbRepeats = 0;
4450 while ( avgThick < 0.99 )
4452 // new target length
4453 double prevThick = curThick;
4454 curThick += data._stepSize;
4455 if ( curThick > tgtThick )
4457 curThick = tgtThick + tgtThick*( 1.-avgThick ) * nbRepeats;
4461 double stepSize = curThick - prevThick;
4462 updateNormalsOfSmoothed( data, helper, nbSteps, stepSize ); // to ease smoothing
4464 // Elongate _LayerEdge's
4465 dumpFunction(SMESH_Comment("inflate")<<data._index<<"_step"<<nbSteps); // debug
4466 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
4468 _EdgesOnShape& eos = data._edgesOnShape[iS];
4469 if ( eos._edges.empty() ) continue;
4471 const double shapeCurThick = Min( curThick, eos._hyp.GetTotalThickness() );
4472 for ( size_t i = 0; i < eos._edges.size(); ++i )
4474 eos._edges[i]->SetNewLength( shapeCurThick, eos, helper );
4479 if ( !updateNormals( data, helper, nbSteps, stepSize )) // to avoid collisions
4482 // Improve and check quality
4483 if ( !smoothAndCheck( data, nbSteps, distToIntersection ))
4487 #ifdef __NOT_INVALIDATE_BAD_SMOOTH
4488 debugMsg("NOT INVALIDATED STEP!");
4489 return error("Smoothing failed", data._index);
4491 dumpFunction(SMESH_Comment("invalidate")<<data._index<<"_step"<<nbSteps); // debug
4492 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
4494 _EdgesOnShape& eos = data._edgesOnShape[iS];
4495 for ( size_t i = 0; i < eos._edges.size(); ++i )
4496 eos._edges[i]->InvalidateStep( nbSteps+1, eos );
4500 break; // no more inflating possible
4504 // Evaluate achieved thickness
4506 int nbActiveEdges = 0;
4507 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
4509 _EdgesOnShape& eos = data._edgesOnShape[iS];
4510 if ( eos._edges.empty() ) continue;
4512 const double shapeTgtThick = eos._hyp.GetTotalThickness();
4513 for ( size_t i = 0; i < eos._edges.size(); ++i )
4515 if ( eos._edges[i]->_nodes.size() > 1 )
4516 avgThick += Min( 1., eos._edges[i]->_len / shapeTgtThick );
4518 avgThick += shapeTgtThick;
4519 nbActiveEdges += ( ! eos._edges[i]->Is( _LayerEdge::BLOCKED ));
4522 avgThick /= data._n2eMap.size();
4523 debugMsg( "-- Thickness " << curThick << " ("<< avgThick*100 << "%) reached" );
4525 #ifdef BLOCK_INFLATION
4526 if ( nbActiveEdges == 0 )
4528 debugMsg( "-- Stop inflation since all _LayerEdge's BLOCKED " );
4532 if ( distToIntersection < tgtThick * avgThick * safeFactor && avgThick < 0.9 )
4534 debugMsg( "-- Stop inflation since "
4535 << " distToIntersection( "<<distToIntersection<<" ) < avgThick( "
4536 << tgtThick * avgThick << " ) * " << safeFactor );
4541 limitStepSize( data, 0.25 * distToIntersection );
4542 if ( data._stepSizeNodes[0] )
4543 data._stepSize = data._stepSizeCoeff *
4544 SMESH_TNodeXYZ(data._stepSizeNodes[0]).Distance(data._stepSizeNodes[1]);
4546 } // while ( avgThick < 0.99 )
4549 return error("failed at the very first inflation step", data._index);
4551 if ( avgThick < 0.99 )
4553 if ( !data._proxyMesh->_warning || data._proxyMesh->_warning->IsOK() )
4555 data._proxyMesh->_warning.reset
4556 ( new SMESH_ComputeError (COMPERR_WARNING,
4557 SMESH_Comment("Thickness ") << tgtThick <<
4558 " of viscous layers not reached,"
4559 " average reached thickness is " << avgThick*tgtThick));
4563 // Restore position of src nodes moved by inflation on _noShrinkShapes
4564 dumpFunction(SMESH_Comment("restoNoShrink_So")<<data._index); // debug
4565 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
4567 _EdgesOnShape& eos = data._edgesOnShape[iS];
4568 if ( !eos._edges.empty() && eos._edges[0]->_nodes.size() == 1 )
4569 for ( size_t i = 0; i < eos._edges.size(); ++i )
4571 restoreNoShrink( *eos._edges[ i ] );
4576 return safeFactor > 0; // == true (avoid warning: unused variable 'safeFactor')
4579 //================================================================================
4581 * \brief Improve quality of layer inner surface and check intersection
4583 //================================================================================
4585 bool _ViscousBuilder::smoothAndCheck(_SolidData& data,
4587 double & distToIntersection)
4589 if ( data._nbShapesToSmooth == 0 )
4590 return true; // no shapes needing smoothing
4592 bool moved, improved;
4594 vector< _LayerEdge* > movedEdges, badEdges;
4595 vector< _EdgesOnShape* > eosC1; // C1 continues shapes
4596 vector< bool > isConcaveFace;
4598 SMESH_MesherHelper helper(*_mesh);
4599 Handle(ShapeAnalysis_Surface) surface;
4602 for ( int isFace = 0; isFace < 2; ++isFace ) // smooth on [ EDGEs, FACEs ]
4604 const TopAbs_ShapeEnum shapeType = isFace ? TopAbs_FACE : TopAbs_EDGE;
4606 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
4608 _EdgesOnShape& eos = data._edgesOnShape[ iS ];
4609 if ( !eos._toSmooth ||
4610 eos.ShapeType() != shapeType ||
4611 eos._edges.empty() )
4614 // already smoothed?
4615 // bool toSmooth = ( eos._edges[ 0 ]->NbSteps() >= infStep+1 );
4616 // if ( !toSmooth ) continue;
4618 if ( !eos._hyp.ToSmooth() )
4620 // smooth disabled by the user; check validy only
4621 if ( !isFace ) continue;
4623 for ( size_t i = 0; i < eos._edges.size(); ++i )
4625 _LayerEdge* edge = eos._edges[i];
4626 for ( size_t iF = 0; iF < edge->_simplices.size(); ++iF )
4627 if ( !edge->_simplices[iF].IsForward( edge->_nodes[0], edge->_pos.back(), vol ))
4629 // debugMsg( "-- Stop inflation. Bad simplex ("
4630 // << " "<< edge->_nodes[0]->GetID()
4631 // << " "<< edge->_nodes.back()->GetID()
4632 // << " "<< edge->_simplices[iF]._nPrev->GetID()
4633 // << " "<< edge->_simplices[iF]._nNext->GetID() << " ) ");
4635 badEdges.push_back( edge );
4638 if ( !badEdges.empty() )
4642 int nbBad = invalidateBadSmooth( data, helper, badEdges, eosC1, infStep );
4646 continue; // goto the next EDGE or FACE
4650 if ( eos.SWOLType() == TopAbs_FACE )
4652 if ( !F.IsSame( eos._sWOL )) {
4653 F = TopoDS::Face( eos._sWOL );
4654 helper.SetSubShape( F );
4655 surface = helper.GetSurface( F );
4660 F.Nullify(); surface.Nullify();
4662 const TGeomID sInd = eos._shapeID;
4664 // perform smoothing
4666 if ( eos.ShapeType() == TopAbs_EDGE )
4668 dumpFunction(SMESH_Comment("smooth")<<data._index << "_Ed"<<sInd <<"_InfStep"<<infStep);
4670 if ( !eos._edgeSmoother->Perform( data, surface, F, helper ))
4672 // smooth on EDGE's (normally we should not get here)
4676 for ( size_t i = 0; i < eos._edges.size(); ++i )
4678 moved |= eos._edges[i]->SmoothOnEdge( surface, F, helper );
4680 dumpCmd( SMESH_Comment("# end step ")<<step);
4682 while ( moved && step++ < 5 );
4687 else // smooth on FACE
4690 eosC1.push_back( & eos );
4691 eosC1.insert( eosC1.end(), eos._eosC1.begin(), eos._eosC1.end() );
4694 isConcaveFace.resize( eosC1.size() );
4695 for ( size_t iEOS = 0; iEOS < eosC1.size(); ++iEOS )
4697 isConcaveFace[ iEOS ] = data._concaveFaces.count( eosC1[ iEOS ]->_shapeID );
4698 vector< _LayerEdge* > & edges = eosC1[ iEOS ]->_edges;
4699 for ( size_t i = 0; i < edges.size(); ++i )
4700 if ( edges[i]->Is( _LayerEdge::MOVED ) ||
4701 edges[i]->Is( _LayerEdge::NEAR_BOUNDARY ))
4702 movedEdges.push_back( edges[i] );
4704 makeOffsetSurface( *eosC1[ iEOS ], helper );
4707 int step = 0, stepLimit = 5, nbBad = 0;
4708 while (( ++step <= stepLimit ) || improved )
4710 dumpFunction(SMESH_Comment("smooth")<<data._index<<"_Fa"<<sInd
4711 <<"_InfStep"<<infStep<<"_"<<step); // debug
4712 int oldBadNb = nbBad;
4715 #ifdef INCREMENTAL_SMOOTH
4716 bool findBest = false; // ( step == stepLimit );
4717 for ( size_t i = 0; i < movedEdges.size(); ++i )
4719 movedEdges[i]->Unset( _LayerEdge::SMOOTHED );
4720 if ( movedEdges[i]->Smooth( step, findBest, movedEdges ) > 0 )
4721 badEdges.push_back( movedEdges[i] );
4724 bool findBest = ( step == stepLimit || isConcaveFace[ iEOS ]);
4725 for ( size_t iEOS = 0; iEOS < eosC1.size(); ++iEOS )
4727 vector< _LayerEdge* > & edges = eosC1[ iEOS ]->_edges;
4728 for ( size_t i = 0; i < edges.size(); ++i )
4730 edges[i]->Unset( _LayerEdge::SMOOTHED );
4731 if ( edges[i]->Smooth( step, findBest, false ) > 0 )
4732 badEdges.push_back( eos._edges[i] );
4736 nbBad = badEdges.size();
4739 debugMsg(SMESH_Comment("nbBad = ") << nbBad );
4741 if ( !badEdges.empty() && step >= stepLimit / 2 )
4743 if ( badEdges[0]->Is( _LayerEdge::ON_CONCAVE_FACE ))
4746 // resolve hard smoothing situation around concave VERTEXes
4747 for ( size_t iEOS = 0; iEOS < eosC1.size(); ++iEOS )
4749 vector< _EdgesOnShape* > & eosCoVe = eosC1[ iEOS ]->_eosConcaVer;
4750 for ( size_t i = 0; i < eosCoVe.size(); ++i )
4751 eosCoVe[i]->_edges[0]->MoveNearConcaVer( eosCoVe[i], eosC1[ iEOS ],
4754 // look for the best smooth of _LayerEdge's neighboring badEdges
4756 for ( size_t i = 0; i < badEdges.size(); ++i )
4758 _LayerEdge* ledge = badEdges[i];
4759 for ( size_t iN = 0; iN < ledge->_neibors.size(); ++iN )
4761 ledge->_neibors[iN]->Unset( _LayerEdge::SMOOTHED );
4762 nbBad += ledge->_neibors[iN]->Smooth( step, true, /*findBest=*/true );
4764 ledge->Unset( _LayerEdge::SMOOTHED );
4765 nbBad += ledge->Smooth( step, true, /*findBest=*/true );
4767 debugMsg(SMESH_Comment("nbBad = ") << nbBad );
4770 if ( nbBad == oldBadNb &&
4772 step < stepLimit ) // smooth w/o chech of validity
4775 dumpFunction(SMESH_Comment("smoothWoCheck")<<data._index<<"_Fa"<<sInd
4776 <<"_InfStep"<<infStep<<"_"<<step); // debug
4777 for ( size_t i = 0; i < movedEdges.size(); ++i )
4779 movedEdges[i]->SmoothWoCheck();
4781 if ( stepLimit < 9 )
4785 improved = ( nbBad < oldBadNb );
4789 if (( step % 3 == 1 ) || ( nbBad > 0 && step >= stepLimit / 2 ))
4790 for ( size_t iEOS = 0; iEOS < eosC1.size(); ++iEOS )
4792 putOnOffsetSurface( *eosC1[ iEOS ], infStep, eosC1, step, /*moveAll=*/step == 1 );
4795 } // smoothing steps
4797 // project -- to prevent intersections or fix bad simplices
4798 for ( size_t iEOS = 0; iEOS < eosC1.size(); ++iEOS )
4800 if ( ! eosC1[ iEOS ]->_eosConcaVer.empty() || nbBad > 0 )
4801 putOnOffsetSurface( *eosC1[ iEOS ], infStep, eosC1 );
4804 //if ( !badEdges.empty() )
4807 for ( size_t iEOS = 0; iEOS < eosC1.size(); ++iEOS )
4809 for ( size_t i = 0; i < eosC1[ iEOS ]->_edges.size(); ++i )
4811 if ( !eosC1[ iEOS ]->_sWOL.IsNull() ) continue;
4813 _LayerEdge* edge = eosC1[ iEOS ]->_edges[i];
4814 edge->CheckNeiborsOnBoundary( & badEdges );
4815 if (( nbBad > 0 ) ||
4816 ( edge->Is( _LayerEdge::BLOCKED ) && edge->Is( _LayerEdge::NEAR_BOUNDARY )))
4818 SMESH_TNodeXYZ tgtXYZ = edge->_nodes.back();
4819 gp_XYZ prevXYZ = edge->PrevCheckPos();
4820 for ( size_t j = 0; j < edge->_simplices.size(); ++j )
4821 if ( !edge->_simplices[j].IsForward( &prevXYZ, &tgtXYZ, vol ))
4823 debugMsg("Bad simplex ( " << edge->_nodes[0]->GetID()
4824 << " "<< tgtXYZ._node->GetID()
4825 << " "<< edge->_simplices[j]._nPrev->GetID()
4826 << " "<< edge->_simplices[j]._nNext->GetID() << " )" );
4827 badEdges.push_back( edge );
4834 // try to fix bad simplices by removing the last inflation step of some _LayerEdge's
4835 nbBad = invalidateBadSmooth( data, helper, badEdges, eosC1, infStep );
4841 } // // smooth on FACE's
4843 } // smooth on [ EDGEs, FACEs ]
4845 // Check orientation of simplices of _LayerEdge's on EDGEs and VERTEXes
4847 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
4849 _EdgesOnShape& eos = data._edgesOnShape[ iS ];
4850 if ( eos.ShapeType() == TopAbs_FACE ||
4851 eos._edges.empty() ||
4852 !eos._sWOL.IsNull() )
4856 for ( size_t i = 0; i < eos._edges.size(); ++i )
4858 _LayerEdge* edge = eos._edges[i];
4859 if ( edge->_nodes.size() < 2 ) continue;
4860 SMESH_TNodeXYZ tgtXYZ = edge->_nodes.back();
4861 gp_XYZ prevXYZ = edge->PrevCheckPos( &eos );
4862 //const gp_XYZ& prevXYZ = edge->PrevPos();
4863 for ( size_t j = 0; j < edge->_simplices.size(); ++j )
4864 if ( !edge->_simplices[j].IsForward( &prevXYZ, &tgtXYZ, vol ))
4866 debugMsg("Bad simplex on bnd ( " << edge->_nodes[0]->GetID()
4867 << " "<< tgtXYZ._node->GetID()
4868 << " "<< edge->_simplices[j]._nPrev->GetID()
4869 << " "<< edge->_simplices[j]._nNext->GetID() << " )" );
4870 badEdges.push_back( edge );
4875 // try to fix bad simplices by removing the last inflation step of some _LayerEdge's
4877 int nbBad = invalidateBadSmooth( data, helper, badEdges, eosC1, infStep );
4883 // Check if the last segments of _LayerEdge intersects 2D elements;
4884 // checked elements are either temporary faces or faces on surfaces w/o the layers
4886 SMESHUtils::Deleter<SMESH_ElementSearcher> searcher
4887 ( SMESH_MeshAlgos::GetElementSearcher( *getMeshDS(),
4888 data._proxyMesh->GetFaces( data._solid )) );
4890 #ifdef BLOCK_INFLATION
4891 const bool toBlockInfaltion = true;
4893 const bool toBlockInfaltion = false;
4895 distToIntersection = Precision::Infinite();
4897 const SMDS_MeshElement* intFace = 0;
4898 const SMDS_MeshElement* closestFace = 0;
4900 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
4902 _EdgesOnShape& eos = data._edgesOnShape[ iS ];
4903 if ( eos._edges.empty() || !eos._sWOL.IsNull() )
4905 for ( size_t i = 0; i < eos._edges.size(); ++i )
4907 if ( eos._edges[i]->Is( _LayerEdge::INTERSECTED ) ||
4908 eos._edges[i]->Is( _LayerEdge::MULTI_NORMAL ))
4910 if ( eos._edges[i]->FindIntersection( *searcher, dist, data._epsilon, eos, &intFace ))
4913 // commented due to "Illegal hash-positionPosition" error in NETGEN
4914 // on Debian60 on viscous_layers_01/B2 case
4915 // Collision; try to deflate _LayerEdge's causing it
4916 // badEdges.clear();
4917 // badEdges.push_back( eos._edges[i] );
4918 // eosC1[0] = & eos;
4919 // int nbBad = invalidateBadSmooth( data, helper, badEdges, eosC1, infStep );
4923 // badEdges.clear();
4924 // if ( _EdgesOnShape* eof = data.GetShapeEdges( intFace->getshapeId() ))
4926 // if ( const _TmpMeshFace* f = dynamic_cast< const _TmpMeshFace*>( intFace ))
4928 // const SMDS_MeshElement* srcFace =
4929 // eof->_subMesh->GetSubMeshDS()->GetElement( f->getIdInShape() );
4930 // SMDS_ElemIteratorPtr nIt = srcFace->nodesIterator();
4931 // while ( nIt->more() )
4933 // const SMDS_MeshNode* srcNode = static_cast<const SMDS_MeshNode*>( nIt->next() );
4934 // TNode2Edge::iterator n2e = data._n2eMap.find( srcNode );
4935 // if ( n2e != data._n2eMap.end() )
4936 // badEdges.push_back( n2e->second );
4939 // nbBad = invalidateBadSmooth( data, helper, badEdges, eosC1, infStep );
4944 // if ( eos._edges[i]->FindIntersection( *searcher, dist, data._epsilon, eos, &intFace ))
4951 SMESH_Comment msg("Invalid? normal at node "); msg << eos._edges[i]->_nodes[0]->GetID();
4956 const bool isShorterDist = ( distToIntersection > dist );
4957 if ( toBlockInfaltion || isShorterDist )
4959 // ignore intersection of a _LayerEdge based on a _ConvexFace with a face
4960 // lying on this _ConvexFace
4961 if ( _ConvexFace* convFace = data.GetConvexFace( intFace->getshapeId() ))
4962 if ( convFace->_subIdToEOS.count ( eos._shapeID ))
4965 // ignore intersection of a _LayerEdge based on a FACE with an element on this FACE
4966 // ( avoid limiting the thickness on the case of issue 22576)
4967 if ( intFace->getshapeId() == eos._shapeID )
4970 // ignore intersection with intFace of an adjacent FACE
4973 bool toIgnore = false;
4974 if ( eos._edges[i]->Is( _LayerEdge::TO_SMOOTH ))
4976 const TopoDS_Shape& S = getMeshDS()->IndexToShape( intFace->getshapeId() );
4977 if ( !S.IsNull() && S.ShapeType() == TopAbs_FACE )
4979 TopExp_Explorer edge( eos._shape, TopAbs_EDGE );
4980 for ( ; !toIgnore && edge.More(); edge.Next() )
4981 // is adjacent - has a common EDGE
4982 toIgnore = ( helper.IsSubShape( edge.Current(), S ));
4984 if ( toIgnore ) // check angle between normals
4987 if ( SMESH_MeshAlgos::FaceNormal( intFace, normal, /*normalized=*/true ))
4988 toIgnore = ( normal * eos._edges[i]->_normal > -0.5 );
4992 if ( !toIgnore ) // check if the edge is a neighbor of intFace
4994 for ( size_t iN = 0; !toIgnore && iN < eos._edges[i]->_neibors.size(); ++iN )
4996 int nInd = intFace->GetNodeIndex( eos._edges[i]->_neibors[ iN ]->_nodes.back() );
4997 toIgnore = ( nInd >= 0 );
5004 // intersection not ignored
5006 if ( toBlockInfaltion &&
5007 dist < ( eos._edges[i]->_len * theThickToIntersection ))
5009 eos._edges[i]->Set( _LayerEdge::INTERSECTED ); // not to intersect
5010 eos._edges[i]->Block( data ); // not to inflate
5012 if ( _EdgesOnShape* eof = data.GetShapeEdges( intFace->getshapeId() ))
5014 // block _LayerEdge's, on top of which intFace is
5015 if ( const _TmpMeshFace* f = dynamic_cast< const _TmpMeshFace*>( intFace ))
5017 const SMDS_MeshElement* srcFace =
5018 eof->_subMesh->GetSubMeshDS()->GetElement( f->getIdInShape() );
5019 SMDS_ElemIteratorPtr nIt = srcFace->nodesIterator();
5020 while ( nIt->more() )
5022 const SMDS_MeshNode* srcNode = static_cast<const SMDS_MeshNode*>( nIt->next() );
5023 TNode2Edge::iterator n2e = data._n2eMap.find( srcNode );
5024 if ( n2e != data._n2eMap.end() )
5025 n2e->second->Block( data );
5031 if ( isShorterDist )
5033 distToIntersection = dist;
5035 closestFace = intFace;
5038 } // if ( toBlockInfaltion || isShorterDist )
5039 } // loop on eos._edges
5040 } // loop on data._edgesOnShape
5042 if ( closestFace && le )
5045 SMDS_MeshElement::iterator nIt = closestFace->begin_nodes();
5046 cout << "Shortest distance: _LayerEdge nodes: tgt " << le->_nodes.back()->GetID()
5047 << " src " << le->_nodes[0]->GetID()<< ", intersection with face ("
5048 << (*nIt++)->GetID()<<" "<< (*nIt++)->GetID()<<" "<< (*nIt++)->GetID()
5049 << ") distance = " << distToIntersection<< endl;
5056 //================================================================================
5058 * \brief try to fix bad simplices by removing the last inflation step of some _LayerEdge's
5059 * \param [in,out] badSmooEdges - _LayerEdge's to fix
5060 * \return int - resulting nb of bad _LayerEdge's
5062 //================================================================================
5064 int _ViscousBuilder::invalidateBadSmooth( _SolidData& data,
5065 SMESH_MesherHelper& helper,
5066 vector< _LayerEdge* >& badSmooEdges,
5067 vector< _EdgesOnShape* >& eosC1,
5070 if ( badSmooEdges.empty() || infStep == 0 ) return 0;
5072 dumpFunction(SMESH_Comment("invalidateBadSmooth")<<"_S"<<eosC1[0]->_shapeID<<"_InfStep"<<infStep);
5075 INVALIDATED = _LayerEdge::UNUSED_FLAG,
5076 TO_INVALIDATE = _LayerEdge::UNUSED_FLAG * 2,
5077 ADDED = _LayerEdge::UNUSED_FLAG * 4
5079 data.UnmarkEdges( TO_INVALIDATE & INVALIDATED & ADDED );
5082 bool haveInvalidated = true;
5083 while ( haveInvalidated )
5085 haveInvalidated = false;
5086 for ( size_t i = 0; i < badSmooEdges.size(); ++i )
5088 _LayerEdge* edge = badSmooEdges[i];
5089 _EdgesOnShape* eos = data.GetShapeEdges( edge );
5091 bool invalidated = false;
5092 if ( edge->Is( TO_INVALIDATE ) && edge->NbSteps() > 1 )
5094 edge->InvalidateStep( edge->NbSteps(), *eos, /*restoreLength=*/true );
5095 edge->Block( data );
5096 edge->Set( INVALIDATED );
5097 edge->Unset( TO_INVALIDATE );
5099 haveInvalidated = true;
5102 // look for _LayerEdge's of bad _simplices
5104 SMESH_TNodeXYZ tgtXYZ = edge->_nodes.back();
5105 gp_XYZ prevXYZ1 = edge->PrevCheckPos( eos );
5106 //const gp_XYZ& prevXYZ2 = edge->PrevPos();
5107 for ( size_t j = 0; j < edge->_simplices.size(); ++j )
5109 if (( edge->_simplices[j].IsForward( &prevXYZ1, &tgtXYZ, vol ))/* &&
5110 ( &prevXYZ1 == &prevXYZ2 || edge->_simplices[j].IsForward( &prevXYZ2, &tgtXYZ, vol ))*/)
5114 _LayerEdge* ee[2] = { 0,0 };
5115 for ( size_t iN = 0; iN < edge->_neibors.size() && !ee[1] ; ++iN )
5116 if ( edge->_simplices[j].Includes( edge->_neibors[iN]->_nodes.back() ))
5117 ee[ ee[0] != 0 ] = edge->_neibors[iN];
5119 int maxNbSteps = Max( ee[0]->NbSteps(), ee[1]->NbSteps() );
5120 while ( maxNbSteps > edge->NbSteps() && isBad )
5123 for ( int iE = 0; iE < 2; ++iE )
5125 if ( ee[ iE ]->NbSteps() > maxNbSteps &&
5126 ee[ iE ]->NbSteps() > 1 )
5128 _EdgesOnShape* eos = data.GetShapeEdges( ee[ iE ] );
5129 ee[ iE ]->InvalidateStep( ee[ iE ]->NbSteps(), *eos, /*restoreLength=*/true );
5130 ee[ iE ]->Block( data );
5131 ee[ iE ]->Set( INVALIDATED );
5132 haveInvalidated = true;
5135 if (( edge->_simplices[j].IsForward( &prevXYZ1, &tgtXYZ, vol )) /*&&
5136 ( &prevXYZ1 == &prevXYZ2 || edge->_simplices[j].IsForward( &prevXYZ2, &tgtXYZ, vol ))*/)
5140 if ( !ee[0]->Is( ADDED )) badSmooEdges.push_back( ee[0] );
5141 if ( !ee[1]->Is( ADDED )) badSmooEdges.push_back( ee[1] );
5142 ee[0]->Set( ADDED );
5143 ee[1]->Set( ADDED );
5146 ee[0]->Set( TO_INVALIDATE );
5147 ee[1]->Set( TO_INVALIDATE );
5151 if ( !invalidated && nbBad > 0 && edge->NbSteps() > 1 )
5153 _EdgesOnShape* eos = data.GetShapeEdges( edge );
5154 edge->InvalidateStep( edge->NbSteps(), *eos, /*restoreLength=*/true );
5155 edge->Block( data );
5156 edge->Set( INVALIDATED );
5157 edge->Unset( TO_INVALIDATE );
5158 haveInvalidated = true;
5160 } // loop on badSmooEdges
5161 } // while ( haveInvalidated )
5163 // re-smooth on analytical EDGEs
5164 for ( size_t i = 0; i < badSmooEdges.size(); ++i )
5166 _LayerEdge* edge = badSmooEdges[i];
5167 if ( !edge->Is( INVALIDATED )) continue;
5169 _EdgesOnShape* eos = data.GetShapeEdges( edge );
5170 if ( eos->ShapeType() == TopAbs_VERTEX )
5172 PShapeIteratorPtr eIt = helper.GetAncestors( eos->_shape, *_mesh, TopAbs_EDGE );
5173 while ( const TopoDS_Shape* e = eIt->next() )
5174 if ( _EdgesOnShape* eoe = data.GetShapeEdges( *e ))
5175 if ( eoe->_edgeSmoother && eoe->_edgeSmoother->isAnalytic() )
5177 // TopoDS_Face F; Handle(ShapeAnalysis_Surface) surface;
5178 // if ( eoe->SWOLType() == TopAbs_FACE ) {
5179 // F = TopoDS::Face( eoe->_sWOL );
5180 // surface = helper.GetSurface( F );
5182 // eoe->_edgeSmoother->Perform( data, surface, F, helper );
5183 eoe->_edgeSmoother->_anaCurve.Nullify();
5189 // check result of invalidation
5192 for ( size_t iEOS = 0; iEOS < eosC1.size(); ++iEOS )
5194 for ( size_t i = 0; i < eosC1[ iEOS ]->_edges.size(); ++i )
5196 if ( !eosC1[ iEOS ]->_sWOL.IsNull() ) continue;
5197 _LayerEdge* edge = eosC1[ iEOS ]->_edges[i];
5198 SMESH_TNodeXYZ tgtXYZ = edge->_nodes.back();
5199 gp_XYZ prevXYZ = edge->PrevCheckPos( eosC1[ iEOS ]);
5200 for ( size_t j = 0; j < edge->_simplices.size(); ++j )
5201 if ( !edge->_simplices[j].IsForward( &prevXYZ, &tgtXYZ, vol ))
5204 debugMsg("Bad simplex remains ( " << edge->_nodes[0]->GetID()
5205 << " "<< tgtXYZ._node->GetID()
5206 << " "<< edge->_simplices[j]._nPrev->GetID()
5207 << " "<< edge->_simplices[j]._nNext->GetID() << " )" );
5216 //================================================================================
5218 * \brief Create an offset surface
5220 //================================================================================
5222 void _ViscousBuilder::makeOffsetSurface( _EdgesOnShape& eos, SMESH_MesherHelper& helper )
5224 if ( eos._offsetSurf.IsNull() ||
5225 eos._edgeForOffset == 0 ||
5226 eos._edgeForOffset->Is( _LayerEdge::BLOCKED ))
5229 Handle(ShapeAnalysis_Surface) baseSurface = helper.GetSurface( TopoDS::Face( eos._shape ));
5232 gp_Pnt tgtP = SMESH_TNodeXYZ( eos._edgeForOffset->_nodes.back() );
5233 /*gp_Pnt2d uv=*/baseSurface->ValueOfUV( tgtP, Precision::Confusion() );
5234 double offset = baseSurface->Gap();
5236 eos._offsetSurf.Nullify();
5240 BRepOffsetAPI_MakeOffsetShape offsetMaker( eos._shape, -offset, Precision::Confusion() );
5241 if ( !offsetMaker.IsDone() ) return;
5243 TopExp_Explorer fExp( offsetMaker.Shape(), TopAbs_FACE );
5244 if ( !fExp.More() ) return;
5246 TopoDS_Face F = TopoDS::Face( fExp.Current() );
5247 Handle(Geom_Surface) surf = BRep_Tool::Surface( F );
5248 if ( surf.IsNull() ) return;
5250 eos._offsetSurf = new ShapeAnalysis_Surface( surf );
5252 catch ( Standard_Failure )
5257 //================================================================================
5259 * \brief Put nodes of a curved FACE to its offset surface
5261 //================================================================================
5263 void _ViscousBuilder::putOnOffsetSurface( _EdgesOnShape& eos,
5265 vector< _EdgesOnShape* >& eosC1,
5269 _EdgesOnShape * eof = & eos;
5270 if ( eos.ShapeType() != TopAbs_FACE ) // eos is a boundary of C1 FACE, look for the FACE eos
5273 for ( size_t i = 0; i < eosC1.size() && !eof; ++i )
5275 if ( eosC1[i]->_offsetSurf.IsNull() ||
5276 eosC1[i]->ShapeType() != TopAbs_FACE ||
5277 eosC1[i]->_edgeForOffset == 0 ||
5278 eosC1[i]->_edgeForOffset->Is( _LayerEdge::BLOCKED ))
5280 if ( SMESH_MesherHelper::IsSubShape( eos._shape, eosC1[i]->_shape ))
5285 eof->_offsetSurf.IsNull() ||
5286 eof->ShapeType() != TopAbs_FACE ||
5287 eof->_edgeForOffset == 0 ||
5288 eof->_edgeForOffset->Is( _LayerEdge::BLOCKED ))
5291 double preci = BRep_Tool::Tolerance( TopoDS::Face( eof->_shape )), vol;
5292 for ( size_t i = 0; i < eos._edges.size(); ++i )
5294 _LayerEdge* edge = eos._edges[i];
5295 edge->Unset( _LayerEdge::MARKED );
5296 if ( edge->Is( _LayerEdge::BLOCKED ) || !edge->_curvature )
5298 if ( !moveAll && !edge->Is( _LayerEdge::MOVED ))
5301 int nbBlockedAround = 0;
5302 for ( size_t iN = 0; iN < edge->_neibors.size(); ++iN )
5303 nbBlockedAround += edge->_neibors[iN]->Is( _LayerEdge::BLOCKED );
5304 if ( nbBlockedAround > 1 )
5307 gp_Pnt tgtP = SMESH_TNodeXYZ( edge->_nodes.back() );
5308 gp_Pnt2d uv = eof->_offsetSurf->NextValueOfUV( edge->_curvature->_uv, tgtP, preci );
5309 if ( eof->_offsetSurf->Gap() > edge->_len ) continue; // NextValueOfUV() bug
5310 edge->_curvature->_uv = uv;
5311 if ( eof->_offsetSurf->Gap() < 10 * preci ) continue; // same pos
5313 gp_XYZ newP = eof->_offsetSurf->Value( uv ).XYZ();
5314 gp_XYZ prevP = edge->PrevCheckPos();
5317 for ( size_t iS = 0; iS < edge->_simplices.size() && ok; ++iS )
5319 ok = edge->_simplices[iS].IsForward( &prevP, &newP, vol );
5323 SMDS_MeshNode* n = const_cast< SMDS_MeshNode* >( edge->_nodes.back() );
5324 n->setXYZ( newP.X(), newP.Y(), newP.Z());
5325 edge->_pos.back() = newP;
5327 edge->Set( _LayerEdge::MARKED );
5332 // dumpMove() for debug
5334 for ( ; i < eos._edges.size(); ++i )
5335 if ( eos._edges[i]->Is( _LayerEdge::MARKED ))
5337 if ( i < eos._edges.size() )
5339 dumpFunction(SMESH_Comment("putOnOffsetSurface_F") << eos._shapeID
5340 << "_InfStep" << infStep << "_" << smooStep );
5341 for ( ; i < eos._edges.size(); ++i )
5343 if ( eos._edges[i]->Is( _LayerEdge::MARKED ))
5344 dumpMove( eos._edges[i]->_nodes.back() );
5351 //================================================================================
5353 * \brief Return a curve of the EDGE to be used for smoothing and arrange
5354 * _LayerEdge's to be in a consequent order
5356 //================================================================================
5358 Handle(Geom_Curve) _Smoother1D::CurveForSmooth( const TopoDS_Edge& E,
5360 SMESH_MesherHelper& helper)
5362 SMESHDS_SubMesh* smDS = eos._subMesh->GetSubMeshDS();
5364 TopLoc_Location loc; double f,l;
5366 Handle(Geom_Line) line;
5367 Handle(Geom_Circle) circle;
5368 bool isLine, isCirc;
5369 if ( eos._sWOL.IsNull() ) /////////////////////////////////////////// 3D case
5371 // check if the EDGE is a line
5372 Handle(Geom_Curve) curve = BRep_Tool::Curve( E, f, l);
5373 if ( curve->IsKind( STANDARD_TYPE( Geom_TrimmedCurve )))
5374 curve = Handle(Geom_TrimmedCurve)::DownCast( curve )->BasisCurve();
5376 line = Handle(Geom_Line)::DownCast( curve );
5377 circle = Handle(Geom_Circle)::DownCast( curve );
5378 isLine = (!line.IsNull());
5379 isCirc = (!circle.IsNull());
5381 if ( !isLine && !isCirc ) // Check if the EDGE is close to a line
5383 isLine = SMESH_Algo::IsStraight( E );
5386 line = new Geom_Line( gp::OX() ); // only type does matter
5388 if ( !isLine && !isCirc && eos._edges.size() > 2) // Check if the EDGE is close to a circle
5393 else //////////////////////////////////////////////////////////////////////// 2D case
5395 if ( !eos._isRegularSWOL ) // 23190
5398 const TopoDS_Face& F = TopoDS::Face( eos._sWOL );
5400 // check if the EDGE is a line
5401 Handle(Geom2d_Curve) curve = BRep_Tool::CurveOnSurface( E, F, f, l );
5402 if ( curve->IsKind( STANDARD_TYPE( Geom2d_TrimmedCurve )))
5403 curve = Handle(Geom2d_TrimmedCurve)::DownCast( curve )->BasisCurve();
5405 Handle(Geom2d_Line) line2d = Handle(Geom2d_Line)::DownCast( curve );
5406 Handle(Geom2d_Circle) circle2d = Handle(Geom2d_Circle)::DownCast( curve );
5407 isLine = (!line2d.IsNull());
5408 isCirc = (!circle2d.IsNull());
5410 if ( !isLine && !isCirc ) // Check if the EDGE is close to a line
5413 SMDS_NodeIteratorPtr nIt = smDS->GetNodes();
5414 while ( nIt->more() )
5415 bndBox.Add( helper.GetNodeUV( F, nIt->next() ));
5416 gp_XY size = bndBox.CornerMax() - bndBox.CornerMin();
5418 const double lineTol = 1e-2 * sqrt( bndBox.SquareExtent() );
5419 for ( int i = 0; i < 2 && !isLine; ++i )
5420 isLine = ( size.Coord( i+1 ) <= lineTol );
5422 if ( !isLine && !isCirc && eos._edges.size() > 2 ) // Check if the EDGE is close to a circle
5428 line = new Geom_Line( gp::OX() ); // only type does matter
5432 gp_Pnt2d p = circle2d->Location();
5433 gp_Ax2 ax( gp_Pnt( p.X(), p.Y(), 0), gp::DX());
5434 circle = new Geom_Circle( ax, 1.); // only center position does matter
5443 return Handle(Geom_Curve)();
5446 //================================================================================
5448 * \brief smooth _LayerEdge's on a staight EDGE or circular EDGE
5450 //================================================================================
5452 bool _Smoother1D::smoothAnalyticEdge( _SolidData& data,
5453 Handle(ShapeAnalysis_Surface)& surface,
5454 const TopoDS_Face& F,
5455 SMESH_MesherHelper& helper)
5457 if ( !isAnalytic() ) return false;
5459 const size_t iFrom = 0, iTo = _eos._edges.size();
5461 if ( _anaCurve->IsKind( STANDARD_TYPE( Geom_Line )))
5463 if ( F.IsNull() ) // 3D
5465 SMESH_TNodeXYZ p0 ( _eos._edges[iFrom]->_2neibors->tgtNode(0) );
5466 SMESH_TNodeXYZ p1 ( _eos._edges[iTo-1]->_2neibors->tgtNode(1) );
5467 SMESH_TNodeXYZ pSrc0( _eos._edges[iFrom]->_2neibors->srcNode(0) );
5468 SMESH_TNodeXYZ pSrc1( _eos._edges[iTo-1]->_2neibors->srcNode(1) );
5469 gp_XYZ newPos, lineDir = pSrc1 - pSrc0;
5470 _LayerEdge* vLE0 = _eos._edges[iFrom]->_2neibors->_edges[0];
5471 _LayerEdge* vLE1 = _eos._edges[iTo-1]->_2neibors->_edges[1];
5472 bool shiftOnly = ( vLE0->Is( _LayerEdge::NORMAL_UPDATED ) ||
5473 vLE0->Is( _LayerEdge::BLOCKED ) ||
5474 vLE1->Is( _LayerEdge::NORMAL_UPDATED ) ||
5475 vLE1->Is( _LayerEdge::BLOCKED ));
5476 for ( size_t i = iFrom; i < iTo; ++i )
5478 _LayerEdge* edge = _eos._edges[i];
5479 SMDS_MeshNode* tgtNode = const_cast<SMDS_MeshNode*>( edge->_nodes.back() );
5480 newPos = p0 * ( 1. - _leParams[i] ) + p1 * _leParams[i];
5482 if ( shiftOnly || edge->Is( _LayerEdge::NORMAL_UPDATED ))
5484 gp_XYZ curPos = SMESH_TNodeXYZ ( tgtNode );
5485 double shift = ( lineDir * ( newPos - pSrc0 ) -
5486 lineDir * ( curPos - pSrc0 ));
5487 newPos = curPos + lineDir * shift / lineDir.SquareModulus();
5489 if ( edge->Is( _LayerEdge::BLOCKED ))
5491 SMESH_TNodeXYZ pSrc( edge->_nodes[0] );
5492 double curThick = pSrc.SquareDistance( tgtNode );
5493 double newThink = ( pSrc - newPos ).SquareModulus();
5494 if ( newThink > curThick )
5497 edge->_pos.back() = newPos;
5498 tgtNode->setXYZ( newPos.X(), newPos.Y(), newPos.Z() );
5499 dumpMove( tgtNode );
5504 _LayerEdge* e0 = getLEdgeOnV( 0 );
5505 _LayerEdge* e1 = getLEdgeOnV( 1 );
5506 gp_XY uv0 = e0->LastUV( F, *data.GetShapeEdges( e0 ));
5507 gp_XY uv1 = e1->LastUV( F, *data.GetShapeEdges( e1 ));
5508 if ( e0->_nodes.back() == e1->_nodes.back() ) // closed edge
5510 int iPeriodic = helper.GetPeriodicIndex();
5511 if ( iPeriodic == 1 || iPeriodic == 2 )
5513 uv1.SetCoord( iPeriodic, helper.GetOtherParam( uv1.Coord( iPeriodic )));
5514 if ( uv0.Coord( iPeriodic ) > uv1.Coord( iPeriodic ))
5515 std::swap( uv0, uv1 );
5518 const gp_XY rangeUV = uv1 - uv0;
5519 for ( size_t i = iFrom; i < iTo; ++i )
5521 if ( _eos._edges[i]->Is( _LayerEdge::BLOCKED )) continue;
5522 gp_XY newUV = uv0 + _leParams[i] * rangeUV;
5523 _eos._edges[i]->_pos.back().SetCoord( newUV.X(), newUV.Y(), 0 );
5525 gp_Pnt newPos = surface->Value( newUV.X(), newUV.Y() );
5526 SMDS_MeshNode* tgtNode = const_cast<SMDS_MeshNode*>( _eos._edges[i]->_nodes.back() );
5527 tgtNode->setXYZ( newPos.X(), newPos.Y(), newPos.Z() );
5528 dumpMove( tgtNode );
5530 SMDS_FacePosition* pos = static_cast<SMDS_FacePosition*>( tgtNode->GetPosition() );
5531 pos->SetUParameter( newUV.X() );
5532 pos->SetVParameter( newUV.Y() );
5538 if ( _anaCurve->IsKind( STANDARD_TYPE( Geom_Circle )))
5540 Handle(Geom_Circle) circle = Handle(Geom_Circle)::DownCast( _anaCurve );
5541 gp_Pnt center3D = circle->Location();
5543 if ( F.IsNull() ) // 3D
5545 if ( getLEdgeOnV( 0 )->_nodes.back() == getLEdgeOnV( 1 )->_nodes.back() )
5546 return true; // closed EDGE - nothing to do
5548 // circle is a real curve of EDGE
5549 gp_Circ circ = circle->Circ();
5551 // new center is shifted along its axis
5552 const gp_Dir& axis = circ.Axis().Direction();
5553 _LayerEdge* e0 = getLEdgeOnV(0);
5554 _LayerEdge* e1 = getLEdgeOnV(1);
5555 SMESH_TNodeXYZ p0 = e0->_nodes.back();
5556 SMESH_TNodeXYZ p1 = e1->_nodes.back();
5557 double shift1 = axis.XYZ() * ( p0 - center3D.XYZ() );
5558 double shift2 = axis.XYZ() * ( p1 - center3D.XYZ() );
5559 gp_Pnt newCenter = center3D.XYZ() + axis.XYZ() * 0.5 * ( shift1 + shift2 );
5561 double newRadius = 0.5 * ( newCenter.Distance( p0 ) + newCenter.Distance( p1 ));
5563 gp_Ax2 newAxis( newCenter, axis, gp_Vec( newCenter, p0 ));
5564 gp_Circ newCirc( newAxis, newRadius );
5565 gp_Vec vecC1 ( newCenter, p1 );
5567 double uLast = newAxis.XDirection().AngleWithRef( vecC1, newAxis.Direction() ); // -PI - +PI
5571 for ( size_t i = iFrom; i < iTo; ++i )
5573 if ( _eos._edges[i]->Is( _LayerEdge::BLOCKED )) continue;
5574 double u = uLast * _leParams[i];
5575 gp_Pnt p = ElCLib::Value( u, newCirc );
5576 _eos._edges[i]->_pos.back() = p.XYZ();
5578 SMDS_MeshNode* tgtNode = const_cast<SMDS_MeshNode*>( _eos._edges[i]->_nodes.back() );
5579 tgtNode->setXYZ( p.X(), p.Y(), p.Z() );
5580 dumpMove( tgtNode );
5586 const gp_XY center( center3D.X(), center3D.Y() );
5588 _LayerEdge* e0 = getLEdgeOnV(0);
5589 _LayerEdge* eM = _eos._edges[ 0 ];
5590 _LayerEdge* e1 = getLEdgeOnV(1);
5591 gp_XY uv0 = e0->LastUV( F, *data.GetShapeEdges( e0 ) );
5592 gp_XY uvM = eM->LastUV( F, *data.GetShapeEdges( eM ) );
5593 gp_XY uv1 = e1->LastUV( F, *data.GetShapeEdges( e1 ) );
5594 gp_Vec2d vec0( center, uv0 );
5595 gp_Vec2d vecM( center, uvM );
5596 gp_Vec2d vec1( center, uv1 );
5597 double uLast = vec0.Angle( vec1 ); // -PI - +PI
5598 double uMidl = vec0.Angle( vecM );
5599 if ( uLast * uMidl <= 0. )
5600 uLast += ( uMidl > 0 ? +2. : -2. ) * M_PI;
5601 const double radius = 0.5 * ( vec0.Magnitude() + vec1.Magnitude() );
5603 gp_Ax2d axis( center, vec0 );
5604 gp_Circ2d circ( axis, radius );
5605 for ( size_t i = iFrom; i < iTo; ++i )
5607 if ( _eos._edges[i]->Is( _LayerEdge::BLOCKED )) continue;
5608 double newU = uLast * _leParams[i];
5609 gp_Pnt2d newUV = ElCLib::Value( newU, circ );
5610 _eos._edges[i]->_pos.back().SetCoord( newUV.X(), newUV.Y(), 0 );
5612 gp_Pnt newPos = surface->Value( newUV.X(), newUV.Y() );
5613 SMDS_MeshNode* tgtNode = const_cast<SMDS_MeshNode*>( _eos._edges[i]->_nodes.back() );
5614 tgtNode->setXYZ( newPos.X(), newPos.Y(), newPos.Z() );
5615 dumpMove( tgtNode );
5617 SMDS_FacePosition* pos = static_cast<SMDS_FacePosition*>( tgtNode->GetPosition() );
5618 pos->SetUParameter( newUV.X() );
5619 pos->SetVParameter( newUV.Y() );
5628 //================================================================================
5630 * \brief smooth _LayerEdge's on a an EDGE
5632 //================================================================================
5634 bool _Smoother1D::smoothComplexEdge( _SolidData& data,
5635 Handle(ShapeAnalysis_Surface)& surface,
5636 const TopoDS_Face& F,
5637 SMESH_MesherHelper& helper)
5639 if ( _offPoints.empty() )
5642 // move _offPoints along normals of _LayerEdge's
5644 _LayerEdge* e[2] = { getLEdgeOnV(0), getLEdgeOnV(1) };
5645 if ( e[0]->Is( _LayerEdge::NORMAL_UPDATED ))
5646 _leOnV[0]._normal = getNormalNormal( e[0]->_normal, _edgeDir[0] );
5647 if ( e[1]->Is( _LayerEdge::NORMAL_UPDATED ))
5648 _leOnV[1]._normal = getNormalNormal( e[1]->_normal, _edgeDir[1] );
5649 _leOnV[0]._len = e[0]->_len;
5650 _leOnV[1]._len = e[1]->_len;
5651 for ( size_t i = 0; i < _offPoints.size(); i++ )
5653 _LayerEdge* e0 = _offPoints[i]._2edges._edges[0];
5654 _LayerEdge* e1 = _offPoints[i]._2edges._edges[1];
5655 const double w0 = _offPoints[i]._2edges._wgt[0];
5656 const double w1 = _offPoints[i]._2edges._wgt[1];
5657 gp_XYZ avgNorm = ( e0->_normal * w0 + e1->_normal * w1 ).Normalized();
5658 double avgLen = ( e0->_len * w0 + e1->_len * w1 );
5659 double avgFact = ( e0->_lenFactor * w0 + e1->_lenFactor * w1 );
5660 if ( e0->Is( _LayerEdge::NORMAL_UPDATED ) ||
5661 e1->Is( _LayerEdge::NORMAL_UPDATED ))
5662 avgNorm = getNormalNormal( avgNorm, _offPoints[i]._edgeDir );
5664 _offPoints[i]._xyz += avgNorm * ( avgLen - _offPoints[i]._len ) * avgFact;
5665 _offPoints[i]._len = avgLen;
5669 if ( !surface.IsNull() ) // project _offPoints to the FACE
5671 fTol = 100 * BRep_Tool::Tolerance( F );
5672 //const double segLen = _offPoints[0].Distance( _offPoints[1] );
5674 gp_Pnt2d uv = surface->ValueOfUV( _offPoints[0]._xyz, fTol );
5675 //if ( surface->Gap() < 0.5 * segLen )
5676 _offPoints[0]._xyz = surface->Value( uv ).XYZ();
5678 for ( size_t i = 1; i < _offPoints.size(); ++i )
5680 uv = surface->NextValueOfUV( uv, _offPoints[i]._xyz, fTol );
5681 //if ( surface->Gap() < 0.5 * segLen )
5682 _offPoints[i]._xyz = surface->Value( uv ).XYZ();
5686 // project tgt nodes of extreme _LayerEdge's to the offset segments
5688 if ( e[0]->Is( _LayerEdge::NORMAL_UPDATED )) _iSeg[0] = 0;
5689 if ( e[1]->Is( _LayerEdge::NORMAL_UPDATED )) _iSeg[1] = _offPoints.size()-2;
5691 gp_Pnt pExtreme[2], pProj[2];
5692 for ( int is2nd = 0; is2nd < 2; ++is2nd )
5694 pExtreme[ is2nd ] = SMESH_TNodeXYZ( e[is2nd]->_nodes.back() );
5695 int i = _iSeg[ is2nd ];
5696 int di = is2nd ? -1 : +1;
5697 bool projected = false;
5698 double uOnSeg, distMin = Precision::Infinite(), dist, distPrev = 0;
5701 gp_Vec v0p( _offPoints[i]._xyz, pExtreme[ is2nd ] );
5702 gp_Vec v01( _offPoints[i]._xyz, _offPoints[i+1]._xyz );
5703 uOnSeg = ( v0p * v01 ) / v01.SquareMagnitude(); // param [0,1] along v01
5704 projected = ( Abs( uOnSeg - 0.5 ) <= 0.5 );
5705 dist = pExtreme[ is2nd ].SquareDistance( _offPoints[ i + ( uOnSeg > 0.5 )]._xyz );
5706 if ( dist < distMin || projected )
5709 pProj[ is2nd ] = _offPoints[i]._xyz + ( v01 * uOnSeg ).XYZ();
5712 else if ( dist > distPrev )
5714 if ( ++nbWorse > 3 ) // avoid projection to the middle of a closed EDGE
5720 while ( !projected &&
5721 i >= 0 && i+1 < (int)_offPoints.size() );
5725 if (( is2nd && _iSeg[1] != _offPoints.size()-2 ) || ( !is2nd && _iSeg[0] != 0 ))
5728 _iSeg[1] = _offPoints.size()-2;
5729 debugMsg( "smoothComplexEdge() failed to project nodes of extreme _LayerEdge's" );
5734 if ( _iSeg[0] > _iSeg[1] )
5736 debugMsg( "smoothComplexEdge() incorrectly projected nodes of extreme _LayerEdge's" );
5740 // adjust length of extreme LE (test viscous_layers_01/B7)
5741 gp_Vec vDiv0( pExtreme[0], pProj[0] );
5742 gp_Vec vDiv1( pExtreme[1], pProj[1] );
5743 double d0 = vDiv0.Magnitude();
5744 double d1 = vDiv1.Magnitude();
5745 if ( e[0]->_normal * vDiv0.XYZ() < 0 ) e[0]->_len += d0;
5746 else e[0]->_len -= d0;
5747 if ( e[1]->_normal * vDiv1.XYZ() < 0 ) e[1]->_len += d1;
5748 else e[1]->_len -= d1;
5750 // compute normalized length of the offset segments located between the projections
5752 size_t iSeg = 0, nbSeg = _iSeg[1] - _iSeg[0] + 1;
5753 vector< double > len( nbSeg + 1 );
5755 len[ iSeg++ ] = pProj[ 0 ].Distance( _offPoints[ _iSeg[0]+1 ]._xyz )/* * e[0]->_lenFactor*/;
5756 for ( size_t i = _iSeg[0]+1; i <= _iSeg[1]; ++i, ++iSeg )
5758 len[ iSeg ] = len[ iSeg-1 ] + _offPoints[i].Distance( _offPoints[i+1] );
5760 len[ nbSeg ] -= pProj[ 1 ].Distance( _offPoints[ _iSeg[1]+1 ]._xyz )/* * e[1]->_lenFactor*/;
5762 // d0 *= e[0]->_lenFactor;
5763 // d1 *= e[1]->_lenFactor;
5764 double fullLen = len.back() - d0 - d1;
5765 for ( iSeg = 0; iSeg < len.size(); ++iSeg )
5766 len[iSeg] = ( len[iSeg] - d0 ) / fullLen;
5768 // temporary replace extreme _offPoints by pExtreme
5769 gp_XYZ op[2] = { _offPoints[ _iSeg[0] ]._xyz,
5770 _offPoints[ _iSeg[1]+1 ]._xyz };
5771 _offPoints[ _iSeg[0] ]._xyz = pExtreme[0].XYZ();
5772 _offPoints[ _iSeg[1]+ 1]._xyz = pExtreme[1].XYZ();
5774 // distribute tgt nodes of _LayerEdge's between the projections
5777 for ( size_t i = 0; i < _eos._edges.size(); ++i )
5779 if ( _eos._edges[i]->Is( _LayerEdge::BLOCKED )) continue;
5780 while ( iSeg+2 < len.size() && _leParams[i] > len[ iSeg+1 ] )
5782 double r = ( _leParams[i] - len[ iSeg ]) / ( len[ iSeg+1 ] - len[ iSeg ]);
5783 gp_XYZ p = ( _offPoints[ iSeg + _iSeg[0] ]._xyz * ( 1 - r ) +
5784 _offPoints[ iSeg + _iSeg[0] + 1 ]._xyz * r );
5786 if ( surface.IsNull() )
5788 _eos._edges[i]->_pos.back() = p;
5790 else // project a new node position to a FACE
5792 gp_Pnt2d uv ( _eos._edges[i]->_pos.back().X(), _eos._edges[i]->_pos.back().Y() );
5793 gp_Pnt2d uv2( surface->NextValueOfUV( uv, p, fTol ));
5795 p = surface->Value( uv2 ).XYZ();
5796 _eos._edges[i]->_pos.back().SetCoord( uv2.X(), uv2.Y(), 0 );
5798 SMDS_MeshNode* tgtNode = const_cast<SMDS_MeshNode*>( _eos._edges[i]->_nodes.back() );
5799 tgtNode->setXYZ( p.X(), p.Y(), p.Z() );
5800 dumpMove( tgtNode );
5803 _offPoints[ _iSeg[0] ]._xyz = op[0];
5804 _offPoints[ _iSeg[1]+1 ]._xyz = op[1];
5809 //================================================================================
5811 * \brief Prepare for smoothing
5813 //================================================================================
5815 void _Smoother1D::prepare(_SolidData& data)
5817 const TopoDS_Edge& E = TopoDS::Edge( _eos._shape );
5818 _curveLen = SMESH_Algo::EdgeLength( E );
5820 // sort _LayerEdge's by position on the EDGE
5821 data.SortOnEdge( E, _eos._edges );
5823 // compute normalized param of _eos._edges on EDGE
5824 _leParams.resize( _eos._edges.size() + 1 );
5827 gp_Pnt pPrev = SMESH_TNodeXYZ( getLEdgeOnV( 0 )->_nodes[0] );
5829 for ( size_t i = 0; i < _eos._edges.size(); ++i )
5831 gp_Pnt p = SMESH_TNodeXYZ( _eos._edges[i]->_nodes[0] );
5832 curLen = p.Distance( pPrev );
5833 _leParams[i+1] = _leParams[i] + curLen;
5836 double fullLen = _leParams.back() + pPrev.Distance( SMESH_TNodeXYZ( getLEdgeOnV(1)->_nodes[0]));
5837 for ( size_t i = 0; i < _leParams.size()-1; ++i )
5838 _leParams[i] = _leParams[i+1] / fullLen;
5844 // divide E to have offset segments with low deflection
5845 BRepAdaptor_Curve c3dAdaptor( E );
5846 const double curDeflect = 0.1; //0.3; // 0.01; // Curvature deflection
5847 const double angDeflect = 0.1; //0.2; // 0.09; // Angular deflection
5848 GCPnts_TangentialDeflection discret(c3dAdaptor, angDeflect, curDeflect);
5849 if ( discret.NbPoints() <= 2 )
5851 _anaCurve = new Geom_Line( gp::OX() ); // only type does matter
5855 const double u0 = c3dAdaptor.FirstParameter();
5856 gp_Pnt p; gp_Vec tangent;
5857 _offPoints.resize( discret.NbPoints() );
5858 for ( size_t i = 0; i < _offPoints.size(); i++ )
5860 double u = discret.Parameter( i+1 );
5861 c3dAdaptor.D1( u, p, tangent );
5862 _offPoints[i]._xyz = p.XYZ();
5863 _offPoints[i]._edgeDir = tangent.XYZ();
5864 _offPoints[i]._param = GCPnts_AbscissaPoint::Length( c3dAdaptor, u0, u ) / _curveLen;
5867 _LayerEdge* leOnV[2] = { getLEdgeOnV(0), getLEdgeOnV(1) };
5870 _offPoints [0]._2edges.set( &_leOnV[0], &_leOnV[0], 0.5, 0.5 );
5871 _offPoints.back()._2edges.set( &_leOnV[1], &_leOnV[1], 0.5, 0.5 );
5872 _2NearEdges tmp2edges;
5873 tmp2edges._edges[1] = _eos._edges[0];
5874 _leOnV[0]._2neibors = & tmp2edges;
5875 _leOnV[0]._nodes = leOnV[0]->_nodes;
5876 _leOnV[1]._nodes = leOnV[1]->_nodes;
5877 _LayerEdge* eNext, *ePrev = & _leOnV[0];
5878 for ( size_t iLE = 0, i = 1; i < _offPoints.size()-1; i++ )
5880 // find _LayerEdge's located before and after an offset point
5881 // (_eos._edges[ iLE ] is next after ePrev)
5882 while ( iLE < _eos._edges.size() && _offPoints[i]._param > _leParams[ iLE ] )
5883 ePrev = _eos._edges[ iLE++ ];
5884 eNext = ePrev->_2neibors->_edges[1];
5886 gp_Pnt p0 = SMESH_TNodeXYZ( ePrev->_nodes[0] );
5887 gp_Pnt p1 = SMESH_TNodeXYZ( eNext->_nodes[0] );
5888 double r = p0.Distance( _offPoints[i]._xyz ) / p0.Distance( p1 );
5889 _offPoints[i]._2edges.set( ePrev, eNext, 1-r, r );
5892 // replace _LayerEdge's on VERTEX by _leOnV in _offPoints._2edges
5893 for ( size_t i = 0; i < _offPoints.size(); i++ )
5894 if ( _offPoints[i]._2edges._edges[0] == leOnV[0] )
5895 _offPoints[i]._2edges._edges[0] = & _leOnV[0];
5897 for ( size_t i = _offPoints.size()-1; i > 0; i-- )
5898 if ( _offPoints[i]._2edges._edges[1] == leOnV[1] )
5899 _offPoints[i]._2edges._edges[1] = & _leOnV[1];
5902 // set _normal of _leOnV[0] and _leOnV[1] to be normal to the EDGE
5904 int iLBO = _offPoints.size() - 2; // last but one
5906 _edgeDir[0] = getEdgeDir( E, leOnV[0]->_nodes[0], data.GetHelper() );
5907 _edgeDir[1] = getEdgeDir( E, leOnV[1]->_nodes[0], data.GetHelper() );
5909 _leOnV[ 0 ]._normal = getNormalNormal( leOnV[0]->_normal, _edgeDir[0] );
5910 _leOnV[ 1 ]._normal = getNormalNormal( leOnV[1]->_normal, _edgeDir[1] );
5911 _leOnV[ 0 ]._len = 0;
5912 _leOnV[ 1 ]._len = 0;
5913 _leOnV[ 0 ]._lenFactor = _offPoints[1 ]._2edges._edges[1]->_lenFactor;
5914 _leOnV[ 1 ]._lenFactor = _offPoints[iLBO]._2edges._edges[0]->_lenFactor;
5917 _iSeg[1] = _offPoints.size()-2;
5919 // initialize OffPnt::_len
5920 for ( size_t i = 0; i < _offPoints.size(); ++i )
5921 _offPoints[i]._len = 0;
5923 if ( _eos._edges[0]->NbSteps() > 1 ) // already inflated several times, init _xyz
5925 _leOnV[0]._len = leOnV[0]->_len;
5926 _leOnV[1]._len = leOnV[1]->_len;
5927 for ( size_t i = 0; i < _offPoints.size(); i++ )
5929 _LayerEdge* e0 = _offPoints[i]._2edges._edges[0];
5930 _LayerEdge* e1 = _offPoints[i]._2edges._edges[1];
5931 const double w0 = _offPoints[i]._2edges._wgt[0];
5932 const double w1 = _offPoints[i]._2edges._wgt[1];
5933 double avgLen = ( e0->_len * w0 + e1->_len * w1 );
5934 gp_XYZ avgXYZ = ( SMESH_TNodeXYZ( e0->_nodes.back() ) * w0 +
5935 SMESH_TNodeXYZ( e1->_nodes.back() ) * w1 );
5936 _offPoints[i]._xyz = avgXYZ;
5937 _offPoints[i]._len = avgLen;
5942 //================================================================================
5944 * \brief set _normal of _leOnV[is2nd] to be normal to the EDGE
5946 //================================================================================
5948 gp_XYZ _Smoother1D::getNormalNormal( const gp_XYZ & normal,
5949 const gp_XYZ& edgeDir)
5951 gp_XYZ cross = normal ^ edgeDir;
5952 gp_XYZ norm = edgeDir ^ cross;
5953 double size = norm.Modulus();
5958 //================================================================================
5960 * \brief Sort _LayerEdge's by a parameter on a given EDGE
5962 //================================================================================
5964 void _SolidData::SortOnEdge( const TopoDS_Edge& E,
5965 vector< _LayerEdge* >& edges)
5967 map< double, _LayerEdge* > u2edge;
5968 for ( size_t i = 0; i < edges.size(); ++i )
5969 u2edge.insert( u2edge.end(),
5970 make_pair( _helper->GetNodeU( E, edges[i]->_nodes[0] ), edges[i] ));
5972 ASSERT( u2edge.size() == edges.size() );
5973 map< double, _LayerEdge* >::iterator u2e = u2edge.begin();
5974 for ( size_t i = 0; i < edges.size(); ++i, ++u2e )
5975 edges[i] = u2e->second;
5977 Sort2NeiborsOnEdge( edges );
5980 //================================================================================
5982 * \brief Set _2neibors according to the order of _LayerEdge on EDGE
5984 //================================================================================
5986 void _SolidData::Sort2NeiborsOnEdge( vector< _LayerEdge* >& edges )
5988 if ( edges.size() < 2 || !edges[0]->_2neibors ) return;
5990 for ( size_t i = 0; i < edges.size()-1; ++i )
5991 if ( edges[i]->_2neibors->tgtNode(1) != edges[i+1]->_nodes.back() )
5992 edges[i]->_2neibors->reverse();
5994 const size_t iLast = edges.size() - 1;
5995 if ( edges.size() > 1 &&
5996 edges[iLast]->_2neibors->tgtNode(0) != edges[iLast-1]->_nodes.back() )
5997 edges[iLast]->_2neibors->reverse();
6000 //================================================================================
6002 * \brief Return _EdgesOnShape* corresponding to the shape
6004 //================================================================================
6006 _EdgesOnShape* _SolidData::GetShapeEdges(const TGeomID shapeID )
6008 if ( shapeID < (int)_edgesOnShape.size() &&
6009 _edgesOnShape[ shapeID ]._shapeID == shapeID )
6010 return _edgesOnShape[ shapeID ]._subMesh ? & _edgesOnShape[ shapeID ] : 0;
6012 for ( size_t i = 0; i < _edgesOnShape.size(); ++i )
6013 if ( _edgesOnShape[i]._shapeID == shapeID )
6014 return _edgesOnShape[i]._subMesh ? & _edgesOnShape[i] : 0;
6019 //================================================================================
6021 * \brief Return _EdgesOnShape* corresponding to the shape
6023 //================================================================================
6025 _EdgesOnShape* _SolidData::GetShapeEdges(const TopoDS_Shape& shape )
6027 SMESHDS_Mesh* meshDS = _proxyMesh->GetMesh()->GetMeshDS();
6028 return GetShapeEdges( meshDS->ShapeToIndex( shape ));
6031 //================================================================================
6033 * \brief Prepare data of the _LayerEdge for smoothing on FACE
6035 //================================================================================
6037 void _SolidData::PrepareEdgesToSmoothOnFace( _EdgesOnShape* eos, bool substituteSrcNodes )
6039 SMESH_MesherHelper helper( *_proxyMesh->GetMesh() );
6041 set< TGeomID > vertices;
6043 if ( eos->ShapeType() == TopAbs_FACE )
6045 // check FACE concavity and get concave VERTEXes
6046 F = TopoDS::Face( eos->_shape );
6047 if ( isConcave( F, helper, &vertices ))
6048 _concaveFaces.insert( eos->_shapeID );
6050 // set eos._eosConcaVer
6051 eos->_eosConcaVer.clear();
6052 eos->_eosConcaVer.reserve( vertices.size() );
6053 for ( set< TGeomID >::iterator v = vertices.begin(); v != vertices.end(); ++v )
6055 _EdgesOnShape* eov = GetShapeEdges( *v );
6056 if ( eov && eov->_edges.size() == 1 )
6058 eos->_eosConcaVer.push_back( eov );
6059 for ( size_t i = 0; i < eov->_edges[0]->_neibors.size(); ++i )
6060 eov->_edges[0]->_neibors[i]->Set( _LayerEdge::DIFFICULT );
6064 // SetSmooLen() to _LayerEdge's on FACE
6065 for ( size_t i = 0; i < eos->_edges.size(); ++i )
6067 eos->_edges[i]->SetSmooLen( Precision::Infinite() );
6069 SMESH_subMeshIteratorPtr smIt = eos->_subMesh->getDependsOnIterator(/*includeSelf=*/false);
6070 while ( smIt->more() ) // loop on sub-shapes of the FACE
6072 _EdgesOnShape* eoe = GetShapeEdges( smIt->next()->GetId() );
6073 if ( !eoe ) continue;
6075 vector<_LayerEdge*>& eE = eoe->_edges;
6076 for ( size_t iE = 0; iE < eE.size(); ++iE ) // loop on _LayerEdge's on EDGE or VERTEX
6078 if ( eE[iE]->_cosin <= theMinSmoothCosin )
6081 SMDS_ElemIteratorPtr segIt = eE[iE]->_nodes[0]->GetInverseElementIterator(SMDSAbs_Edge);
6082 while ( segIt->more() )
6084 const SMDS_MeshElement* seg = segIt->next();
6085 if ( !eos->_subMesh->DependsOn( seg->getshapeId() ))
6087 if ( seg->GetNode(0) != eE[iE]->_nodes[0] )
6088 continue; // not to check a seg twice
6089 for ( size_t iN = 0; iN < eE[iE]->_neibors.size(); ++iN )
6091 _LayerEdge* eN = eE[iE]->_neibors[iN];
6092 if ( eN->_nodes[0]->getshapeId() != eos->_shapeID )
6094 double dist = SMESH_MeshAlgos::GetDistance( seg, SMESH_TNodeXYZ( eN->_nodes[0] ));
6095 double smooLen = getSmoothingThickness( eE[iE]->_cosin, dist );
6096 eN->SetSmooLen( Min( smooLen, eN->GetSmooLen() ));
6097 eN->Set( _LayerEdge::NEAR_BOUNDARY );
6102 } // if ( eos->ShapeType() == TopAbs_FACE )
6104 for ( size_t i = 0; i < eos->_edges.size(); ++i )
6106 eos->_edges[i]->_smooFunction = 0;
6107 eos->_edges[i]->Set( _LayerEdge::TO_SMOOTH );
6109 bool isCurved = false;
6110 for ( size_t i = 0; i < eos->_edges.size(); ++i )
6112 _LayerEdge* edge = eos->_edges[i];
6114 // get simplices sorted
6115 _Simplex::SortSimplices( edge->_simplices );
6117 // smoothing function
6118 edge->ChooseSmooFunction( vertices, _n2eMap );
6121 double avgNormProj = 0, avgLen = 0;
6122 for ( size_t iS = 0; iS < edge->_simplices.size(); ++iS )
6124 _Simplex& s = edge->_simplices[iS];
6126 gp_XYZ vec = edge->_pos.back() - SMESH_TNodeXYZ( s._nPrev );
6127 avgNormProj += edge->_normal * vec;
6128 avgLen += vec.Modulus();
6129 if ( substituteSrcNodes )
6131 s._nNext = _n2eMap[ s._nNext ]->_nodes.back();
6132 s._nPrev = _n2eMap[ s._nPrev ]->_nodes.back();
6135 avgNormProj /= edge->_simplices.size();
6136 avgLen /= edge->_simplices.size();
6137 if (( edge->_curvature = _Curvature::New( avgNormProj, avgLen )))
6140 SMDS_FacePosition* fPos = dynamic_cast<SMDS_FacePosition*>( edge->_nodes[0]->GetPosition() );
6142 for ( size_t iS = 0; iS < edge->_simplices.size() && !fPos; ++iS )
6143 fPos = dynamic_cast<SMDS_FacePosition*>( edge->_simplices[iS]._nPrev->GetPosition() );
6145 edge->_curvature->_uv.SetCoord( fPos->GetUParameter(), fPos->GetVParameter() );
6149 // prepare for putOnOffsetSurface()
6150 if (( eos->ShapeType() == TopAbs_FACE ) &&
6151 ( isCurved || !eos->_eosConcaVer.empty() ))
6153 eos->_offsetSurf = helper.GetSurface( TopoDS::Face( eos->_shape ));
6154 eos->_edgeForOffset = 0;
6156 double maxCosin = -1;
6157 for ( TopExp_Explorer eExp( eos->_shape, TopAbs_EDGE ); eExp.More(); eExp.Next() )
6159 _EdgesOnShape* eoe = GetShapeEdges( eExp.Current() );
6160 if ( !eoe || eoe->_edges.empty() ) continue;
6162 vector<_LayerEdge*>& eE = eoe->_edges;
6163 _LayerEdge* e = eE[ eE.size() / 2 ];
6164 if ( e->_cosin > maxCosin )
6166 eos->_edgeForOffset = e;
6167 maxCosin = e->_cosin;
6173 //================================================================================
6175 * \brief Add faces for smoothing
6177 //================================================================================
6179 void _SolidData::AddShapesToSmooth( const set< _EdgesOnShape* >& eosToSmooth,
6180 const set< _EdgesOnShape* >* edgesNoAnaSmooth )
6182 set< _EdgesOnShape * >::const_iterator eos = eosToSmooth.begin();
6183 for ( ; eos != eosToSmooth.end(); ++eos )
6185 if ( !*eos || (*eos)->_toSmooth ) continue;
6187 (*eos)->_toSmooth = true;
6189 if ( (*eos)->ShapeType() == TopAbs_FACE )
6191 PrepareEdgesToSmoothOnFace( *eos, /*substituteSrcNodes=*/false );
6192 (*eos)->_toSmooth = true;
6196 // avoid _Smoother1D::smoothAnalyticEdge() of edgesNoAnaSmooth
6197 if ( edgesNoAnaSmooth )
6198 for ( eos = edgesNoAnaSmooth->begin(); eos != edgesNoAnaSmooth->end(); ++eos )
6200 if ( (*eos)->_edgeSmoother )
6201 (*eos)->_edgeSmoother->_anaCurve.Nullify();
6205 //================================================================================
6207 * \brief Limit _LayerEdge::_maxLen according to local curvature
6209 //================================================================================
6211 void _ViscousBuilder::limitMaxLenByCurvature( _SolidData& data, SMESH_MesherHelper& helper )
6213 // find intersection of neighbor _LayerEdge's to limit _maxLen
6214 // according to local curvature (IPAL52648)
6216 // This method must be called after findCollisionEdges() where _LayerEdge's
6217 // get _lenFactor initialized in the case of eos._hyp.IsOffsetMethod()
6219 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
6221 _EdgesOnShape& eosI = data._edgesOnShape[iS];
6222 if ( eosI._edges.empty() ) continue;
6223 if ( !eosI._hyp.ToSmooth() )
6225 for ( size_t i = 0; i < eosI._edges.size(); ++i )
6227 _LayerEdge* eI = eosI._edges[i];
6228 for ( size_t iN = 0; iN < eI->_neibors.size(); ++iN )
6230 _LayerEdge* eN = eI->_neibors[iN];
6231 if ( eI->_nodes[0]->GetID() < eN->_nodes[0]->GetID() ) // treat this pair once
6233 _EdgesOnShape* eosN = data.GetShapeEdges( eN );
6234 limitMaxLenByCurvature( eI, eN, eosI, *eosN, helper );
6239 else if ( eosI.ShapeType() == TopAbs_EDGE )
6241 const TopoDS_Edge& E = TopoDS::Edge( eosI._shape );
6242 if ( SMESH_Algo::IsStraight( E, /*degenResult=*/true )) continue;
6244 _LayerEdge* e0 = eosI._edges[0];
6245 for ( size_t i = 1; i < eosI._edges.size(); ++i )
6247 _LayerEdge* eI = eosI._edges[i];
6248 limitMaxLenByCurvature( eI, e0, eosI, eosI, helper );
6255 //================================================================================
6257 * \brief Limit _LayerEdge::_maxLen according to local curvature
6259 //================================================================================
6261 void _ViscousBuilder::limitMaxLenByCurvature( _LayerEdge* e1,
6263 _EdgesOnShape& eos1,
6264 _EdgesOnShape& eos2,
6265 SMESH_MesherHelper& helper )
6267 gp_XYZ plnNorm = e1->_normal ^ e2->_normal;
6268 double norSize = plnNorm.SquareModulus();
6269 if ( norSize < std::numeric_limits<double>::min() )
6270 return; // parallel normals
6272 // find closest points of skew _LayerEdge's
6273 SMESH_TNodeXYZ src1( e1->_nodes[0] ), src2( e2->_nodes[0] );
6274 gp_XYZ dir12 = src2 - src1;
6275 gp_XYZ perp1 = e1->_normal ^ plnNorm;
6276 gp_XYZ perp2 = e2->_normal ^ plnNorm;
6277 double dot1 = perp2 * e1->_normal;
6278 double dot2 = perp1 * e2->_normal;
6279 double u1 = ( perp2 * dir12 ) / dot1;
6280 double u2 = - ( perp1 * dir12 ) / dot2;
6281 if ( u1 > 0 && u2 > 0 )
6283 double ovl = ( u1 * e1->_normal * dir12 -
6284 u2 * e2->_normal * dir12 ) / dir12.SquareModulus();
6285 if ( ovl > theSmoothThickToElemSizeRatio )
6287 e1->_maxLen = Min( e1->_maxLen, 0.75 * u1 / e1->_lenFactor );
6288 e2->_maxLen = Min( e2->_maxLen, 0.75 * u2 / e2->_lenFactor );
6293 //================================================================================
6295 * \brief Fill data._collisionEdges
6297 //================================================================================
6299 void _ViscousBuilder::findCollisionEdges( _SolidData& data, SMESH_MesherHelper& helper )
6301 data._collisionEdges.clear();
6303 // set the full thickness of the layers to LEs
6304 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
6306 _EdgesOnShape& eos = data._edgesOnShape[iS];
6307 if ( eos._edges.empty() ) continue;
6308 if ( eos.ShapeType() != TopAbs_EDGE && eos.ShapeType() != TopAbs_VERTEX ) continue;
6310 for ( size_t i = 0; i < eos._edges.size(); ++i )
6312 if ( eos._edges[i]->Is( _LayerEdge::BLOCKED )) continue;
6313 double maxLen = eos._edges[i]->_maxLen;
6314 eos._edges[i]->_maxLen = Precision::Infinite(); // avoid blocking
6315 eos._edges[i]->SetNewLength( 1.5 * maxLen, eos, helper );
6316 eos._edges[i]->_maxLen = maxLen;
6320 // make temporary quadrangles got by extrusion of
6321 // mesh edges along _LayerEdge._normal's
6323 vector< const SMDS_MeshElement* > tmpFaces;
6325 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
6327 _EdgesOnShape& eos = data._edgesOnShape[ iS ];
6328 if ( eos.ShapeType() != TopAbs_EDGE )
6330 if ( eos._edges.empty() )
6332 _LayerEdge* edge[2] = { 0, 0 }; // LE of 2 VERTEX'es
6333 SMESH_subMeshIteratorPtr smIt = eos._subMesh->getDependsOnIterator(/*includeSelf=*/false);
6334 while ( smIt->more() )
6335 if ( _EdgesOnShape* eov = data.GetShapeEdges( smIt->next()->GetId() ))
6336 if ( eov->_edges.size() == 1 )
6337 edge[ bool( edge[0]) ] = eov->_edges[0];
6341 _TmpMeshFaceOnEdge* f = new _TmpMeshFaceOnEdge( edge[0], edge[1], --_tmpFaceID );
6342 tmpFaces.push_back( f );
6345 for ( size_t i = 0; i < eos._edges.size(); ++i )
6347 _LayerEdge* edge = eos._edges[i];
6348 for ( int j = 0; j < 2; ++j ) // loop on _2NearEdges
6350 const SMDS_MeshNode* src2 = edge->_2neibors->srcNode(j);
6351 if ( src2->GetPosition()->GetDim() > 0 &&
6352 src2->GetID() < edge->_nodes[0]->GetID() )
6353 continue; // avoid using same segment twice
6355 // a _LayerEdge containg tgt2
6356 _LayerEdge* neiborEdge = edge->_2neibors->_edges[j];
6358 _TmpMeshFaceOnEdge* f = new _TmpMeshFaceOnEdge( edge, neiborEdge, --_tmpFaceID );
6359 tmpFaces.push_back( f );
6364 // Find _LayerEdge's intersecting tmpFaces.
6366 SMDS_ElemIteratorPtr fIt( new SMDS_ElementVectorIterator( tmpFaces.begin(),
6368 SMESHUtils::Deleter<SMESH_ElementSearcher> searcher
6369 ( SMESH_MeshAlgos::GetElementSearcher( *getMeshDS(), fIt ));
6371 double dist1, dist2, segLen, eps = 0.5;
6372 _CollisionEdges collEdges;
6373 vector< const SMDS_MeshElement* > suspectFaces;
6374 const double angle45 = Cos( 45. * M_PI / 180. );
6376 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
6378 _EdgesOnShape& eos = data._edgesOnShape[ iS ];
6379 if ( eos.ShapeType() == TopAbs_FACE || !eos._sWOL.IsNull() )
6381 // find sub-shapes whose VL can influence VL on eos
6382 set< TGeomID > neighborShapes;
6383 PShapeIteratorPtr fIt = helper.GetAncestors( eos._shape, *_mesh, TopAbs_FACE );
6384 while ( const TopoDS_Shape* face = fIt->next() )
6386 TGeomID faceID = getMeshDS()->ShapeToIndex( *face );
6387 if ( _EdgesOnShape* eof = data.GetShapeEdges( faceID ))
6389 SMESH_subMeshIteratorPtr subIt = eof->_subMesh->getDependsOnIterator(/*includeSelf=*/false);
6390 while ( subIt->more() )
6391 neighborShapes.insert( subIt->next()->GetId() );
6394 if ( eos.ShapeType() == TopAbs_VERTEX )
6396 PShapeIteratorPtr eIt = helper.GetAncestors( eos._shape, *_mesh, TopAbs_EDGE );
6397 while ( const TopoDS_Shape* edge = eIt->next() )
6398 neighborShapes.erase( getMeshDS()->ShapeToIndex( *edge ));
6400 // find intersecting _LayerEdge's
6401 for ( size_t i = 0; i < eos._edges.size(); ++i )
6403 if ( eos._edges[i]->Is( _LayerEdge::MULTI_NORMAL )) continue;
6404 _LayerEdge* edge = eos._edges[i];
6405 gp_Ax1 lastSegment = edge->LastSegment( segLen, eos );
6408 gp_Vec eSegDir0, eSegDir1;
6409 if ( edge->IsOnEdge() )
6411 SMESH_TNodeXYZ eP( edge->_nodes[0] );
6412 eSegDir0 = SMESH_TNodeXYZ( edge->_2neibors->srcNode(0) ) - eP;
6413 eSegDir1 = SMESH_TNodeXYZ( edge->_2neibors->srcNode(1) ) - eP;
6415 suspectFaces.clear();
6416 searcher->GetElementsInSphere( SMESH_TNodeXYZ( edge->_nodes.back()), edge->_len * 2,
6417 SMDSAbs_Face, suspectFaces );
6418 collEdges._intEdges.clear();
6419 for ( size_t j = 0 ; j < suspectFaces.size(); ++j )
6421 const _TmpMeshFaceOnEdge* f = (const _TmpMeshFaceOnEdge*) suspectFaces[j];
6422 if ( f->_le1 == edge || f->_le2 == edge ) continue;
6423 if ( !neighborShapes.count( f->_le1->_nodes[0]->getshapeId() )) continue;
6424 if ( !neighborShapes.count( f->_le2->_nodes[0]->getshapeId() )) continue;
6425 if ( edge->IsOnEdge() ) {
6426 if ( edge->_2neibors->include( f->_le1 ) ||
6427 edge->_2neibors->include( f->_le2 )) continue;
6430 if (( f->_le1->IsOnEdge() && f->_le1->_2neibors->include( edge )) ||
6431 ( f->_le2->IsOnEdge() && f->_le2->_2neibors->include( edge ))) continue;
6433 dist1 = dist2 = Precision::Infinite();
6434 if ( !edge->SegTriaInter( lastSegment, f->_nn[0], f->_nn[1], f->_nn[2], dist1, eps ))
6435 dist1 = Precision::Infinite();
6436 if ( !edge->SegTriaInter( lastSegment, f->_nn[3], f->_nn[2], f->_nn[0], dist2, eps ))
6437 dist2 = Precision::Infinite();
6438 if (( dist1 > segLen ) && ( dist2 > segLen ))
6441 if ( edge->IsOnEdge() )
6443 // skip perpendicular EDGEs
6444 gp_Vec fSegDir = SMESH_TNodeXYZ( f->_nn[0] ) - SMESH_TNodeXYZ( f->_nn[3] );
6445 bool isParallel = ( isLessAngle( eSegDir0, fSegDir, angle45 ) ||
6446 isLessAngle( eSegDir1, fSegDir, angle45 ) ||
6447 isLessAngle( eSegDir0, fSegDir.Reversed(), angle45 ) ||
6448 isLessAngle( eSegDir1, fSegDir.Reversed(), angle45 ));
6453 // either limit inflation of edges or remember them for updating _normal
6454 // double dot = edge->_normal * f->GetDir();
6457 collEdges._intEdges.push_back( f->_le1 );
6458 collEdges._intEdges.push_back( f->_le2 );
6462 // double shortLen = 0.75 * ( Min( dist1, dist2 ) / edge->_lenFactor );
6463 // edge->_maxLen = Min( shortLen, edge->_maxLen );
6467 if ( !collEdges._intEdges.empty() )
6469 collEdges._edge = edge;
6470 data._collisionEdges.push_back( collEdges );
6475 for ( size_t i = 0 ; i < tmpFaces.size(); ++i )
6478 // restore the zero thickness
6479 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
6481 _EdgesOnShape& eos = data._edgesOnShape[iS];
6482 if ( eos._edges.empty() ) continue;
6483 if ( eos.ShapeType() != TopAbs_EDGE && eos.ShapeType() != TopAbs_VERTEX ) continue;
6485 for ( size_t i = 0; i < eos._edges.size(); ++i )
6487 eos._edges[i]->InvalidateStep( 1, eos );
6488 eos._edges[i]->_len = 0;
6493 //================================================================================
6495 * \brief Modify normals of _LayerEdge's on EDGE's to avoid intersection with
6496 * _LayerEdge's on neighbor EDGE's
6498 //================================================================================
6500 bool _ViscousBuilder::updateNormals( _SolidData& data,
6501 SMESH_MesherHelper& helper,
6505 updateNormalsOfC1Vertices( data );
6507 if ( stepNb > 0 && !updateNormalsOfConvexFaces( data, helper, stepNb ))
6510 // map to store new _normal and _cosin for each intersected edge
6511 map< _LayerEdge*, _LayerEdge, _LayerEdgeCmp > edge2newEdge;
6512 map< _LayerEdge*, _LayerEdge, _LayerEdgeCmp >::iterator e2neIt;
6513 _LayerEdge zeroEdge;
6514 zeroEdge._normal.SetCoord( 0,0,0 );
6515 zeroEdge._maxLen = Precision::Infinite();
6516 zeroEdge._nodes.resize(1); // to init _TmpMeshFaceOnEdge
6518 set< _EdgesOnShape* > shapesToSmooth, edgesNoAnaSmooth;
6520 double segLen, dist1, dist2, dist;
6521 vector< pair< _LayerEdge*, double > > intEdgesDist;
6522 _TmpMeshFaceOnEdge quad( &zeroEdge, &zeroEdge, 0 );
6524 for ( int iter = 0; iter < 5; ++iter )
6526 edge2newEdge.clear();
6528 for ( size_t iE = 0; iE < data._collisionEdges.size(); ++iE )
6530 _CollisionEdges& ce = data._collisionEdges[iE];
6531 _LayerEdge* edge1 = ce._edge;
6532 if ( !edge1 /*|| edge1->Is( _LayerEdge::BLOCKED )*/) continue;
6533 _EdgesOnShape* eos1 = data.GetShapeEdges( edge1 );
6534 if ( !eos1 ) continue;
6536 // detect intersections
6537 gp_Ax1 lastSeg = edge1->LastSegment( segLen, *eos1 );
6538 double testLen = 1.5 * edge1->_maxLen * edge1->_lenFactor;
6540 intEdgesDist.clear();
6541 double minIntDist = Precision::Infinite();
6542 for ( size_t i = 0; i < ce._intEdges.size(); i += 2 )
6544 if ( edge1->Is( _LayerEdge::BLOCKED ) &&
6545 ce._intEdges[i ]->Is( _LayerEdge::BLOCKED ) &&
6546 ce._intEdges[i+1]->Is( _LayerEdge::BLOCKED ))
6548 double dot = edge1->_normal * quad.GetDir( ce._intEdges[i], ce._intEdges[i+1] );
6549 double fact = ( 1.1 + dot * dot );
6550 SMESH_TNodeXYZ pSrc0( ce.nSrc(i) ), pSrc1( ce.nSrc(i+1) );
6551 SMESH_TNodeXYZ pTgt0( ce.nTgt(i) ), pTgt1( ce.nTgt(i+1) );
6552 gp_XYZ pLast0 = pSrc0 + ( pTgt0 - pSrc0 ) * fact;
6553 gp_XYZ pLast1 = pSrc1 + ( pTgt1 - pSrc1 ) * fact;
6554 dist1 = dist2 = Precision::Infinite();
6555 if ( !edge1->SegTriaInter( lastSeg, pSrc0, pLast0, pSrc1, dist1, eps ) &&
6556 !edge1->SegTriaInter( lastSeg, pSrc1, pLast1, pLast0, dist2, eps ))
6559 if ( dist > testLen || dist <= 0 )
6562 if ( dist > testLen || dist <= 0 )
6565 // choose a closest edge
6566 gp_Pnt intP( lastSeg.Location().XYZ() + lastSeg.Direction().XYZ() * ( dist + segLen ));
6567 double d1 = intP.SquareDistance( pSrc0 );
6568 double d2 = intP.SquareDistance( pSrc1 );
6569 int iClose = i + ( d2 < d1 );
6570 _LayerEdge* edge2 = ce._intEdges[iClose];
6571 edge2->Unset( _LayerEdge::MARKED );
6573 // choose a closest edge among neighbors
6574 gp_Pnt srcP( SMESH_TNodeXYZ( edge1->_nodes[0] ));
6575 d1 = srcP.SquareDistance( SMESH_TNodeXYZ( edge2->_nodes[0] ));
6576 for ( size_t j = 0; j < intEdgesDist.size(); ++j )
6578 _LayerEdge * edgeJ = intEdgesDist[j].first;
6579 if ( edge2->IsNeiborOnEdge( edgeJ ))
6581 d2 = srcP.SquareDistance( SMESH_TNodeXYZ( edgeJ->_nodes[0] ));
6582 ( d1 < d2 ? edgeJ : edge2 )->Set( _LayerEdge::MARKED );
6585 intEdgesDist.push_back( make_pair( edge2, dist ));
6586 // if ( Abs( d2 - d1 ) / Max( d2, d1 ) < 0.5 )
6588 // iClose = i + !( d2 < d1 );
6589 // intEdges.push_back( ce._intEdges[iClose] );
6590 // ce._intEdges[iClose]->Unset( _LayerEdge::MARKED );
6592 minIntDist = Min( edge1->_len * edge1->_lenFactor - segLen + dist, minIntDist );
6597 // compute new _normals
6598 for ( size_t i = 0; i < intEdgesDist.size(); ++i )
6600 _LayerEdge* edge2 = intEdgesDist[i].first;
6601 double distWgt = edge1->_len / intEdgesDist[i].second;
6602 // if ( edge1->Is( _LayerEdge::BLOCKED ) &&
6603 // edge2->Is( _LayerEdge::BLOCKED )) continue;
6604 if ( edge2->Is( _LayerEdge::MARKED )) continue;
6605 edge2->Set( _LayerEdge::MARKED );
6608 gp_XYZ dir1 = edge1->_normal, dir2 = edge2->_normal;
6610 double cos1 = Abs( edge1->_cosin ), cos2 = Abs( edge2->_cosin );
6611 double wgt1 = ( cos1 + 0.001 ) / ( cos1 + cos2 + 0.002 );
6612 double wgt2 = ( cos2 + 0.001 ) / ( cos1 + cos2 + 0.002 );
6613 // double cos1 = Abs( edge1->_cosin ), cos2 = Abs( edge2->_cosin );
6614 // double sgn1 = 0.1 * ( 1 + edge1->_cosin ), sgn2 = 0.1 * ( 1 + edge2->_cosin );
6615 // double wgt1 = ( cos1 + sgn1 ) / ( cos1 + cos2 + sgn1 + sgn2 );
6616 // double wgt2 = ( cos2 + sgn2 ) / ( cos1 + cos2 + sgn1 + sgn2 );
6617 gp_XYZ newNormal = wgt1 * dir1 + wgt2 * dir2;
6618 newNormal.Normalize();
6622 double sgn1 = edge1->_cosin / cos1, sgn2 = edge2->_cosin / cos2;
6623 if ( cos1 < theMinSmoothCosin )
6625 newCos = cos2 * sgn1;
6627 else if ( cos2 > theMinSmoothCosin ) // both cos1 and cos2 > theMinSmoothCosin
6629 newCos = ( wgt1 * cos1 + wgt2 * cos2 ) * edge1->_cosin / cos1;
6633 newCos = edge1->_cosin;
6636 e2neIt = edge2newEdge.insert( make_pair( edge1, zeroEdge )).first;
6637 e2neIt->second._normal += distWgt * newNormal;
6638 e2neIt->second._cosin = newCos;
6639 e2neIt->second._maxLen = 0.7 * minIntDist / edge1->_lenFactor;
6640 if ( iter > 0 && sgn1 * sgn2 < 0 && edge1->_cosin < 0 )
6641 e2neIt->second._normal += dir2;
6642 e2neIt = edge2newEdge.insert( make_pair( edge2, zeroEdge )).first;
6643 e2neIt->second._normal += distWgt * newNormal;
6644 e2neIt->second._cosin = edge2->_cosin;
6645 if ( iter > 0 && sgn1 * sgn2 < 0 && edge2->_cosin < 0 )
6646 e2neIt->second._normal += dir1;
6650 if ( edge2newEdge.empty() )
6651 break; //return true;
6653 dumpFunction(SMESH_Comment("updateNormals")<< data._index << "_" << stepNb << "_it" << iter);
6655 // Update data of edges depending on a new _normal
6658 for ( e2neIt = edge2newEdge.begin(); e2neIt != edge2newEdge.end(); ++e2neIt )
6660 _LayerEdge* edge = e2neIt->first;
6661 if ( edge->Is( _LayerEdge::BLOCKED )) continue;
6662 _LayerEdge& newEdge = e2neIt->second;
6663 _EdgesOnShape* eos = data.GetShapeEdges( edge );
6665 // Check if a new _normal is OK:
6666 newEdge._normal.Normalize();
6667 if ( !isNewNormalOk( data, *edge, newEdge._normal ))
6669 if ( newEdge._maxLen < edge->_len && iter > 0 ) // limit _maxLen
6671 edge->InvalidateStep( stepNb + 1, *eos, /*restoreLength=*/true );
6672 edge->_maxLen = newEdge._maxLen;
6673 edge->SetNewLength( newEdge._maxLen, *eos, helper );
6675 continue; // the new _normal is bad
6677 // the new _normal is OK
6679 // find shapes that need smoothing due to change of _normal
6680 if ( edge->_cosin < theMinSmoothCosin &&
6681 newEdge._cosin > theMinSmoothCosin )
6683 if ( eos->_sWOL.IsNull() )
6685 SMDS_ElemIteratorPtr fIt = edge->_nodes[0]->GetInverseElementIterator(SMDSAbs_Face);
6686 while ( fIt->more() )
6687 shapesToSmooth.insert( data.GetShapeEdges( fIt->next()->getshapeId() ));
6689 else // edge inflates along a FACE
6691 TopoDS_Shape V = helper.GetSubShapeByNode( edge->_nodes[0], getMeshDS() );
6692 PShapeIteratorPtr eIt = helper.GetAncestors( V, *_mesh, TopAbs_EDGE, &eos->_sWOL );
6693 while ( const TopoDS_Shape* E = eIt->next() )
6695 gp_Vec edgeDir = getEdgeDir( TopoDS::Edge( *E ), TopoDS::Vertex( V ));
6696 double angle = edgeDir.Angle( newEdge._normal ); // [0,PI]
6697 if ( angle < M_PI / 2 )
6698 shapesToSmooth.insert( data.GetShapeEdges( *E ));
6703 double len = edge->_len;
6704 edge->InvalidateStep( stepNb + 1, *eos, /*restoreLength=*/true );
6705 edge->SetNormal( newEdge._normal );
6706 edge->SetCosin( newEdge._cosin );
6707 edge->SetNewLength( len, *eos, helper );
6708 edge->Set( _LayerEdge::MARKED );
6709 edge->Set( _LayerEdge::NORMAL_UPDATED );
6710 edgesNoAnaSmooth.insert( eos );
6713 // Update normals and other dependent data of not intersecting _LayerEdge's
6714 // neighboring the intersecting ones
6716 for ( e2neIt = edge2newEdge.begin(); e2neIt != edge2newEdge.end(); ++e2neIt )
6718 _LayerEdge* edge1 = e2neIt->first;
6719 _EdgesOnShape* eos1 = data.GetShapeEdges( edge1 );
6720 if ( !edge1->Is( _LayerEdge::MARKED ))
6723 if ( edge1->IsOnEdge() )
6725 const SMDS_MeshNode * n1 = edge1->_2neibors->srcNode(0);
6726 const SMDS_MeshNode * n2 = edge1->_2neibors->srcNode(1);
6727 edge1->SetDataByNeighbors( n1, n2, *eos1, helper );
6730 if ( !edge1->_2neibors || !eos1->_sWOL.IsNull() )
6732 for ( int j = 0; j < 2; ++j ) // loop on 2 neighbors
6734 _LayerEdge* neighbor = edge1->_2neibors->_edges[j];
6735 if ( neighbor->Is( _LayerEdge::MARKED ) /*edge2newEdge.count ( neighbor )*/)
6736 continue; // j-th neighbor is also intersected
6737 _LayerEdge* prevEdge = edge1;
6738 const int nbSteps = 10;
6739 for ( int step = nbSteps; step; --step ) // step from edge1 in j-th direction
6741 if ( neighbor->Is( _LayerEdge::BLOCKED ) ||
6742 neighbor->Is( _LayerEdge::MARKED ))
6744 _EdgesOnShape* eos = data.GetShapeEdges( neighbor );
6745 if ( !eos ) continue;
6746 _LayerEdge* nextEdge = neighbor;
6747 if ( neighbor->_2neibors )
6750 nextEdge = neighbor->_2neibors->_edges[iNext];
6751 if ( nextEdge == prevEdge )
6752 nextEdge = neighbor->_2neibors->_edges[ ++iNext ];
6754 double r = double(step-1)/nbSteps/(iter+1);
6755 if ( !nextEdge->_2neibors )
6758 gp_XYZ newNorm = prevEdge->_normal * r + nextEdge->_normal * (1-r);
6759 newNorm.Normalize();
6760 if ( !isNewNormalOk( data, *neighbor, newNorm ))
6763 double len = neighbor->_len;
6764 neighbor->InvalidateStep( stepNb + 1, *eos, /*restoreLength=*/true );
6765 neighbor->SetNormal( newNorm );
6766 neighbor->SetCosin( prevEdge->_cosin * r + nextEdge->_cosin * (1-r) );
6767 if ( neighbor->_2neibors )
6768 neighbor->SetDataByNeighbors( prevEdge->_nodes[0], nextEdge->_nodes[0], *eos, helper );
6769 neighbor->SetNewLength( len, *eos, helper );
6770 neighbor->Set( _LayerEdge::MARKED );
6771 neighbor->Set( _LayerEdge::NORMAL_UPDATED );
6772 edgesNoAnaSmooth.insert( eos );
6774 if ( !neighbor->_2neibors )
6775 break; // neighbor is on VERTEX
6777 // goto the next neighbor
6778 prevEdge = neighbor;
6779 neighbor = nextEdge;
6786 data.AddShapesToSmooth( shapesToSmooth, &edgesNoAnaSmooth );
6791 //================================================================================
6793 * \brief Check if a new normal is OK
6795 //================================================================================
6797 bool _ViscousBuilder::isNewNormalOk( _SolidData& data,
6799 const gp_XYZ& newNormal)
6801 // check a min angle between the newNormal and surrounding faces
6802 vector<_Simplex> simplices;
6803 SMESH_TNodeXYZ n0( edge._nodes[0] ), n1, n2;
6804 _Simplex::GetSimplices( n0._node, simplices, data._ignoreFaceIds, &data );
6805 double newMinDot = 1, curMinDot = 1;
6806 for ( size_t i = 0; i < simplices.size(); ++i )
6808 n1.Set( simplices[i]._nPrev );
6809 n2.Set( simplices[i]._nNext );
6810 gp_XYZ normFace = ( n1 - n0 ) ^ ( n2 - n0 );
6811 double normLen2 = normFace.SquareModulus();
6812 if ( normLen2 < std::numeric_limits<double>::min() )
6814 normFace /= Sqrt( normLen2 );
6815 newMinDot = Min( newNormal * normFace, newMinDot );
6816 curMinDot = Min( edge._normal * normFace, curMinDot );
6819 if ( newMinDot < 0.5 )
6821 ok = ( newMinDot >= curMinDot * 0.9 );
6822 //return ( newMinDot >= ( curMinDot * ( 0.8 + 0.1 * edge.NbSteps() )));
6823 // double initMinDot2 = 1. - edge._cosin * edge._cosin;
6824 // return ( newMinDot * newMinDot ) >= ( 0.8 * initMinDot2 );
6830 //================================================================================
6832 * \brief Modify normals of _LayerEdge's on FACE to reflex smoothing
6834 //================================================================================
6836 bool _ViscousBuilder::updateNormalsOfSmoothed( _SolidData& data,
6837 SMESH_MesherHelper& helper,
6839 const double stepSize )
6841 if ( data._nbShapesToSmooth == 0 || nbSteps == 0 )
6842 return true; // no shapes needing smoothing
6844 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
6846 _EdgesOnShape& eos = data._edgesOnShape[ iS ];
6847 if ( //!eos._toSmooth || _eosC1 have _toSmooth == false
6848 !eos._hyp.ToSmooth() ||
6849 eos.ShapeType() != TopAbs_FACE ||
6850 eos._edges.empty() )
6853 bool toSmooth = ( eos._edges[ 0 ]->NbSteps() >= nbSteps+1 );
6854 if ( !toSmooth ) continue;
6856 for ( size_t i = 0; i < eos._edges.size(); ++i )
6858 _LayerEdge* edge = eos._edges[i];
6859 if ( !edge->Is( _LayerEdge::SMOOTHED ))
6861 if ( edge->Is( _LayerEdge::DIFFICULT ) && nbSteps != 1 )
6864 const gp_XYZ& pPrev = edge->PrevPos();
6865 const gp_XYZ& pLast = edge->_pos.back();
6866 gp_XYZ stepVec = pLast - pPrev;
6867 double realStepSize = stepVec.Modulus();
6868 if ( realStepSize < numeric_limits<double>::min() )
6871 edge->_lenFactor = realStepSize / stepSize;
6872 edge->_normal = stepVec / realStepSize;
6873 edge->Set( _LayerEdge::NORMAL_UPDATED );
6880 //================================================================================
6882 * \brief Modify normals of _LayerEdge's on C1 VERTEXes
6884 //================================================================================
6886 void _ViscousBuilder::updateNormalsOfC1Vertices( _SolidData& data )
6888 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
6890 _EdgesOnShape& eov = data._edgesOnShape[ iS ];
6891 if ( eov._eosC1.empty() ||
6892 eov.ShapeType() != TopAbs_VERTEX ||
6893 eov._edges.empty() )
6896 gp_XYZ newNorm = eov._edges[0]->_normal;
6897 double curThick = eov._edges[0]->_len * eov._edges[0]->_lenFactor;
6898 bool normChanged = false;
6900 for ( size_t i = 0; i < eov._eosC1.size(); ++i )
6902 _EdgesOnShape* eoe = eov._eosC1[i];
6903 const TopoDS_Edge& e = TopoDS::Edge( eoe->_shape );
6904 const double eLen = SMESH_Algo::EdgeLength( e );
6905 TopoDS_Shape oppV = SMESH_MesherHelper::IthVertex( 0, e );
6906 if ( oppV.IsSame( eov._shape ))
6907 oppV = SMESH_MesherHelper::IthVertex( 1, e );
6908 _EdgesOnShape* eovOpp = data.GetShapeEdges( oppV );
6909 if ( !eovOpp || eovOpp->_edges.empty() ) continue;
6910 if ( eov._edges[0]->Is( _LayerEdge::BLOCKED )) continue;
6912 double curThickOpp = eovOpp->_edges[0]->_len * eovOpp->_edges[0]->_lenFactor;
6913 if ( curThickOpp + curThick < eLen )
6916 double wgt = 2. * curThick / eLen;
6917 newNorm += wgt * eovOpp->_edges[0]->_normal;
6922 eov._edges[0]->SetNormal( newNorm.Normalized() );
6923 eov._edges[0]->Set( _LayerEdge::NORMAL_UPDATED );
6928 //================================================================================
6930 * \brief Modify normals of _LayerEdge's on _ConvexFace's
6932 //================================================================================
6934 bool _ViscousBuilder::updateNormalsOfConvexFaces( _SolidData& data,
6935 SMESH_MesherHelper& helper,
6938 SMESHDS_Mesh* meshDS = helper.GetMeshDS();
6941 map< TGeomID, _ConvexFace >::iterator id2face = data._convexFaces.begin();
6942 for ( ; id2face != data._convexFaces.end(); ++id2face )
6944 _ConvexFace & convFace = (*id2face).second;
6945 if ( convFace._normalsFixed )
6946 continue; // already fixed
6947 if ( convFace.CheckPrisms() )
6948 continue; // nothing to fix
6950 convFace._normalsFixed = true;
6952 BRepAdaptor_Surface surface ( convFace._face, false );
6953 BRepLProp_SLProps surfProp( surface, 2, 1e-6 );
6955 // check if the convex FACE is of spherical shape
6957 Bnd_B3d centersBox; // bbox of centers of curvature of _LayerEdge's on VERTEXes
6961 map< TGeomID, _EdgesOnShape* >::iterator id2eos = convFace._subIdToEOS.begin();
6962 for ( ; id2eos != convFace._subIdToEOS.end(); ++id2eos )
6964 _EdgesOnShape& eos = *(id2eos->second);
6965 if ( eos.ShapeType() == TopAbs_VERTEX )
6967 _LayerEdge* ledge = eos._edges[ 0 ];
6968 if ( convFace.GetCenterOfCurvature( ledge, surfProp, helper, center ))
6969 centersBox.Add( center );
6971 for ( size_t i = 0; i < eos._edges.size(); ++i )
6972 nodesBox.Add( SMESH_TNodeXYZ( eos._edges[ i ]->_nodes[0] ));
6974 if ( centersBox.IsVoid() )
6976 debugMsg( "Error: centersBox.IsVoid()" );
6979 const bool isSpherical =
6980 ( centersBox.SquareExtent() < 1e-6 * nodesBox.SquareExtent() );
6982 int nbEdges = helper.Count( convFace._face, TopAbs_EDGE, /*ignoreSame=*/false );
6983 vector < _CentralCurveOnEdge > centerCurves( nbEdges );
6987 // set _LayerEdge::_normal as average of all normals
6989 // WARNING: different density of nodes on EDGEs is not taken into account that
6990 // can lead to an improper new normal
6992 gp_XYZ avgNormal( 0,0,0 );
6994 id2eos = convFace._subIdToEOS.begin();
6995 for ( ; id2eos != convFace._subIdToEOS.end(); ++id2eos )
6997 _EdgesOnShape& eos = *(id2eos->second);
6998 // set data of _CentralCurveOnEdge
6999 if ( eos.ShapeType() == TopAbs_EDGE )
7001 _CentralCurveOnEdge& ceCurve = centerCurves[ nbEdges++ ];
7002 ceCurve.SetShapes( TopoDS::Edge( eos._shape ), convFace, data, helper );
7003 if ( !eos._sWOL.IsNull() )
7004 ceCurve._adjFace.Nullify();
7006 ceCurve._ledges.insert( ceCurve._ledges.end(),
7007 eos._edges.begin(), eos._edges.end());
7009 // summarize normals
7010 for ( size_t i = 0; i < eos._edges.size(); ++i )
7011 avgNormal += eos._edges[ i ]->_normal;
7013 double normSize = avgNormal.SquareModulus();
7014 if ( normSize < 1e-200 )
7016 debugMsg( "updateNormalsOfConvexFaces(): zero avgNormal" );
7019 avgNormal /= Sqrt( normSize );
7021 // compute new _LayerEdge::_cosin on EDGEs
7022 double avgCosin = 0;
7025 for ( size_t iE = 0; iE < centerCurves.size(); ++iE )
7027 _CentralCurveOnEdge& ceCurve = centerCurves[ iE ];
7028 if ( ceCurve._adjFace.IsNull() )
7030 for ( size_t iLE = 0; iLE < ceCurve._ledges.size(); ++iLE )
7032 const SMDS_MeshNode* node = ceCurve._ledges[ iLE ]->_nodes[0];
7033 inFaceDir = getFaceDir( ceCurve._adjFace, ceCurve._edge, node, helper, isOK );
7036 double angle = inFaceDir.Angle( avgNormal ); // [0,PI]
7037 ceCurve._ledges[ iLE ]->_cosin = Cos( angle );
7038 avgCosin += ceCurve._ledges[ iLE ]->_cosin;
7044 avgCosin /= nbCosin;
7046 // set _LayerEdge::_normal = avgNormal
7047 id2eos = convFace._subIdToEOS.begin();
7048 for ( ; id2eos != convFace._subIdToEOS.end(); ++id2eos )
7050 _EdgesOnShape& eos = *(id2eos->second);
7051 if ( eos.ShapeType() != TopAbs_EDGE )
7052 for ( size_t i = 0; i < eos._edges.size(); ++i )
7053 eos._edges[ i ]->_cosin = avgCosin;
7055 for ( size_t i = 0; i < eos._edges.size(); ++i )
7057 eos._edges[ i ]->SetNormal( avgNormal );
7058 eos._edges[ i ]->Set( _LayerEdge::NORMAL_UPDATED );
7062 else // if ( isSpherical )
7064 // We suppose that centers of curvature at all points of the FACE
7065 // lie on some curve, let's call it "central curve". For all _LayerEdge's
7066 // having a common center of curvature we define the same new normal
7067 // as a sum of normals of _LayerEdge's on EDGEs among them.
7069 // get all centers of curvature for each EDGE
7071 helper.SetSubShape( convFace._face );
7072 _LayerEdge* vertexLEdges[2], **edgeLEdge, **edgeLEdgeEnd;
7074 TopExp_Explorer edgeExp( convFace._face, TopAbs_EDGE );
7075 for ( int iE = 0; edgeExp.More(); edgeExp.Next(), ++iE )
7077 const TopoDS_Edge& edge = TopoDS::Edge( edgeExp.Current() );
7079 // set adjacent FACE
7080 centerCurves[ iE ].SetShapes( edge, convFace, data, helper );
7082 // get _LayerEdge's of the EDGE
7083 TGeomID edgeID = meshDS->ShapeToIndex( edge );
7084 _EdgesOnShape* eos = data.GetShapeEdges( edgeID );
7085 if ( !eos || eos->_edges.empty() )
7087 // no _LayerEdge's on EDGE, use _LayerEdge's on VERTEXes
7088 for ( int iV = 0; iV < 2; ++iV )
7090 TopoDS_Vertex v = helper.IthVertex( iV, edge );
7091 TGeomID vID = meshDS->ShapeToIndex( v );
7092 eos = data.GetShapeEdges( vID );
7093 vertexLEdges[ iV ] = eos->_edges[ 0 ];
7095 edgeLEdge = &vertexLEdges[0];
7096 edgeLEdgeEnd = edgeLEdge + 2;
7098 centerCurves[ iE ]._adjFace.Nullify();
7102 if ( ! eos->_toSmooth )
7103 data.SortOnEdge( edge, eos->_edges );
7104 edgeLEdge = &eos->_edges[ 0 ];
7105 edgeLEdgeEnd = edgeLEdge + eos->_edges.size();
7106 vertexLEdges[0] = eos->_edges.front()->_2neibors->_edges[0];
7107 vertexLEdges[1] = eos->_edges.back() ->_2neibors->_edges[1];
7109 if ( ! eos->_sWOL.IsNull() )
7110 centerCurves[ iE ]._adjFace.Nullify();
7113 // Get curvature centers
7117 if ( edgeLEdge[0]->IsOnEdge() &&
7118 convFace.GetCenterOfCurvature( vertexLEdges[0], surfProp, helper, center ))
7120 centerCurves[ iE ].Append( center, vertexLEdges[0] );
7121 centersBox.Add( center );
7123 for ( ; edgeLEdge < edgeLEdgeEnd; ++edgeLEdge )
7124 if ( convFace.GetCenterOfCurvature( *edgeLEdge, surfProp, helper, center ))
7125 { // EDGE or VERTEXes
7126 centerCurves[ iE ].Append( center, *edgeLEdge );
7127 centersBox.Add( center );
7129 if ( edgeLEdge[-1]->IsOnEdge() &&
7130 convFace.GetCenterOfCurvature( vertexLEdges[1], surfProp, helper, center ))
7132 centerCurves[ iE ].Append( center, vertexLEdges[1] );
7133 centersBox.Add( center );
7135 centerCurves[ iE ]._isDegenerated =
7136 ( centersBox.IsVoid() || centersBox.SquareExtent() < 1e-6 * nodesBox.SquareExtent() );
7138 } // loop on EDGES of convFace._face to set up data of centerCurves
7140 // Compute new normals for _LayerEdge's on EDGEs
7142 double avgCosin = 0;
7145 for ( size_t iE1 = 0; iE1 < centerCurves.size(); ++iE1 )
7147 _CentralCurveOnEdge& ceCurve = centerCurves[ iE1 ];
7148 if ( ceCurve._isDegenerated )
7150 const vector< gp_Pnt >& centers = ceCurve._curvaCenters;
7151 vector< gp_XYZ > & newNormals = ceCurve._normals;
7152 for ( size_t iC1 = 0; iC1 < centers.size(); ++iC1 )
7155 for ( size_t iE2 = 0; iE2 < centerCurves.size() && !isOK; ++iE2 )
7158 isOK = centerCurves[ iE2 ].FindNewNormal( centers[ iC1 ], newNormals[ iC1 ]);
7160 if ( isOK && !ceCurve._adjFace.IsNull() )
7162 // compute new _LayerEdge::_cosin
7163 const SMDS_MeshNode* node = ceCurve._ledges[ iC1 ]->_nodes[0];
7164 inFaceDir = getFaceDir( ceCurve._adjFace, ceCurve._edge, node, helper, isOK );
7167 double angle = inFaceDir.Angle( newNormals[ iC1 ] ); // [0,PI]
7168 ceCurve._ledges[ iC1 ]->_cosin = Cos( angle );
7169 avgCosin += ceCurve._ledges[ iC1 ]->_cosin;
7175 // set new normals to _LayerEdge's of NOT degenerated central curves
7176 for ( size_t iE = 0; iE < centerCurves.size(); ++iE )
7178 if ( centerCurves[ iE ]._isDegenerated )
7180 for ( size_t iLE = 0; iLE < centerCurves[ iE ]._ledges.size(); ++iLE )
7182 centerCurves[ iE ]._ledges[ iLE ]->SetNormal( centerCurves[ iE ]._normals[ iLE ]);
7183 centerCurves[ iE ]._ledges[ iLE ]->Set( _LayerEdge::NORMAL_UPDATED );
7186 // set new normals to _LayerEdge's of degenerated central curves
7187 for ( size_t iE = 0; iE < centerCurves.size(); ++iE )
7189 if ( !centerCurves[ iE ]._isDegenerated ||
7190 centerCurves[ iE ]._ledges.size() < 3 )
7192 // new normal is an average of new normals at VERTEXes that
7193 // was computed on non-degenerated _CentralCurveOnEdge's
7194 gp_XYZ newNorm = ( centerCurves[ iE ]._ledges.front()->_normal +
7195 centerCurves[ iE ]._ledges.back ()->_normal );
7196 double sz = newNorm.Modulus();
7200 double newCosin = ( 0.5 * centerCurves[ iE ]._ledges.front()->_cosin +
7201 0.5 * centerCurves[ iE ]._ledges.back ()->_cosin );
7202 for ( size_t iLE = 1, nb = centerCurves[ iE ]._ledges.size() - 1; iLE < nb; ++iLE )
7204 centerCurves[ iE ]._ledges[ iLE ]->SetNormal( newNorm );
7205 centerCurves[ iE ]._ledges[ iLE ]->_cosin = newCosin;
7206 centerCurves[ iE ]._ledges[ iLE ]->Set( _LayerEdge::NORMAL_UPDATED );
7210 // Find new normals for _LayerEdge's based on FACE
7213 avgCosin /= nbCosin;
7214 const TGeomID faceID = meshDS->ShapeToIndex( convFace._face );
7215 map< TGeomID, _EdgesOnShape* >::iterator id2eos = convFace._subIdToEOS.find( faceID );
7216 if ( id2eos != convFace._subIdToEOS.end() )
7220 _EdgesOnShape& eos = * ( id2eos->second );
7221 for ( size_t i = 0; i < eos._edges.size(); ++i )
7223 _LayerEdge* ledge = eos._edges[ i ];
7224 if ( !convFace.GetCenterOfCurvature( ledge, surfProp, helper, center ))
7226 for ( size_t i = 0; i < centerCurves.size(); ++i, ++iE )
7228 iE = iE % centerCurves.size();
7229 if ( centerCurves[ iE ]._isDegenerated )
7231 newNorm.SetCoord( 0,0,0 );
7232 if ( centerCurves[ iE ].FindNewNormal( center, newNorm ))
7234 ledge->SetNormal( newNorm );
7235 ledge->_cosin = avgCosin;
7236 ledge->Set( _LayerEdge::NORMAL_UPDATED );
7243 } // not a quasi-spherical FACE
7245 // Update _LayerEdge's data according to a new normal
7247 dumpFunction(SMESH_Comment("updateNormalsOfConvexFaces")<<data._index
7248 <<"_F"<<meshDS->ShapeToIndex( convFace._face ));
7250 id2eos = convFace._subIdToEOS.begin();
7251 for ( ; id2eos != convFace._subIdToEOS.end(); ++id2eos )
7253 _EdgesOnShape& eos = * ( id2eos->second );
7254 for ( size_t i = 0; i < eos._edges.size(); ++i )
7256 _LayerEdge* & ledge = eos._edges[ i ];
7257 double len = ledge->_len;
7258 ledge->InvalidateStep( stepNb + 1, eos, /*restoreLength=*/true );
7259 ledge->SetCosin( ledge->_cosin );
7260 ledge->SetNewLength( len, eos, helper );
7262 if ( eos.ShapeType() != TopAbs_FACE )
7263 for ( size_t i = 0; i < eos._edges.size(); ++i )
7265 _LayerEdge* ledge = eos._edges[ i ];
7266 for ( size_t iN = 0; iN < ledge->_neibors.size(); ++iN )
7268 _LayerEdge* neibor = ledge->_neibors[iN];
7269 if ( neibor->_nodes[0]->GetPosition()->GetDim() == 2 )
7271 neibor->Set( _LayerEdge::NEAR_BOUNDARY );
7272 neibor->Set( _LayerEdge::MOVED );
7273 neibor->SetSmooLen( neibor->_len );
7277 } // loop on sub-shapes of convFace._face
7279 // Find FACEs adjacent to convFace._face that got necessity to smooth
7280 // as a result of normals modification
7282 set< _EdgesOnShape* > adjFacesToSmooth;
7283 for ( size_t iE = 0; iE < centerCurves.size(); ++iE )
7285 if ( centerCurves[ iE ]._adjFace.IsNull() ||
7286 centerCurves[ iE ]._adjFaceToSmooth )
7288 for ( size_t iLE = 0; iLE < centerCurves[ iE ]._ledges.size(); ++iLE )
7290 if ( centerCurves[ iE ]._ledges[ iLE ]->_cosin > theMinSmoothCosin )
7292 adjFacesToSmooth.insert( data.GetShapeEdges( centerCurves[ iE ]._adjFace ));
7297 data.AddShapesToSmooth( adjFacesToSmooth );
7302 } // loop on data._convexFaces
7307 //================================================================================
7309 * \brief Finds a center of curvature of a surface at a _LayerEdge
7311 //================================================================================
7313 bool _ConvexFace::GetCenterOfCurvature( _LayerEdge* ledge,
7314 BRepLProp_SLProps& surfProp,
7315 SMESH_MesherHelper& helper,
7316 gp_Pnt & center ) const
7318 gp_XY uv = helper.GetNodeUV( _face, ledge->_nodes[0] );
7319 surfProp.SetParameters( uv.X(), uv.Y() );
7320 if ( !surfProp.IsCurvatureDefined() )
7323 const double oriFactor = ( _face.Orientation() == TopAbs_REVERSED ? +1. : -1. );
7324 double surfCurvatureMax = surfProp.MaxCurvature() * oriFactor;
7325 double surfCurvatureMin = surfProp.MinCurvature() * oriFactor;
7326 if ( surfCurvatureMin > surfCurvatureMax )
7327 center = surfProp.Value().Translated( surfProp.Normal().XYZ() / surfCurvatureMin * oriFactor );
7329 center = surfProp.Value().Translated( surfProp.Normal().XYZ() / surfCurvatureMax * oriFactor );
7334 //================================================================================
7336 * \brief Check that prisms are not distorted
7338 //================================================================================
7340 bool _ConvexFace::CheckPrisms() const
7343 for ( size_t i = 0; i < _simplexTestEdges.size(); ++i )
7345 const _LayerEdge* edge = _simplexTestEdges[i];
7346 SMESH_TNodeXYZ tgtXYZ( edge->_nodes.back() );
7347 for ( size_t j = 0; j < edge->_simplices.size(); ++j )
7348 if ( !edge->_simplices[j].IsForward( edge->_nodes[0], tgtXYZ, vol ))
7350 debugMsg( "Bad simplex of _simplexTestEdges ("
7351 << " "<< edge->_nodes[0]->GetID()<< " "<< tgtXYZ._node->GetID()
7352 << " "<< edge->_simplices[j]._nPrev->GetID()
7353 << " "<< edge->_simplices[j]._nNext->GetID() << " )" );
7360 //================================================================================
7362 * \brief Try to compute a new normal by interpolating normals of _LayerEdge's
7363 * stored in this _CentralCurveOnEdge.
7364 * \param [in] center - curvature center of a point of another _CentralCurveOnEdge.
7365 * \param [in,out] newNormal - current normal at this point, to be redefined
7366 * \return bool - true if succeeded.
7368 //================================================================================
7370 bool _CentralCurveOnEdge::FindNewNormal( const gp_Pnt& center, gp_XYZ& newNormal )
7372 if ( this->_isDegenerated )
7375 // find two centers the given one lies between
7377 for ( size_t i = 0, nb = _curvaCenters.size()-1; i < nb; ++i )
7379 double sl2 = 1.001 * _segLength2[ i ];
7381 double d1 = center.SquareDistance( _curvaCenters[ i ]);
7385 double d2 = center.SquareDistance( _curvaCenters[ i+1 ]);
7386 if ( d2 > sl2 || d2 + d1 < 1e-100 )
7391 double r = d1 / ( d1 + d2 );
7392 gp_XYZ norm = (( 1. - r ) * _ledges[ i ]->_normal +
7393 ( r ) * _ledges[ i+1 ]->_normal );
7397 double sz = newNormal.Modulus();
7406 //================================================================================
7408 * \brief Set shape members
7410 //================================================================================
7412 void _CentralCurveOnEdge::SetShapes( const TopoDS_Edge& edge,
7413 const _ConvexFace& convFace,
7415 SMESH_MesherHelper& helper)
7419 PShapeIteratorPtr fIt = helper.GetAncestors( edge, *helper.GetMesh(), TopAbs_FACE );
7420 while ( const TopoDS_Shape* F = fIt->next())
7421 if ( !convFace._face.IsSame( *F ))
7423 _adjFace = TopoDS::Face( *F );
7424 _adjFaceToSmooth = false;
7425 // _adjFace already in a smoothing queue ?
7426 if ( _EdgesOnShape* eos = data.GetShapeEdges( _adjFace ))
7427 _adjFaceToSmooth = eos->_toSmooth;
7432 //================================================================================
7434 * \brief Looks for intersection of it's last segment with faces
7435 * \param distance - returns shortest distance from the last node to intersection
7437 //================================================================================
7439 bool _LayerEdge::FindIntersection( SMESH_ElementSearcher& searcher,
7441 const double& epsilon,
7443 const SMDS_MeshElement** intFace)
7445 vector< const SMDS_MeshElement* > suspectFaces;
7447 gp_Ax1 lastSegment = LastSegment( segLen, eos );
7448 searcher.GetElementsNearLine( lastSegment, SMDSAbs_Face, suspectFaces );
7450 bool segmentIntersected = false;
7451 distance = Precision::Infinite();
7452 int iFace = -1; // intersected face
7453 for ( size_t j = 0 ; j < suspectFaces.size() /*&& !segmentIntersected*/; ++j )
7455 const SMDS_MeshElement* face = suspectFaces[j];
7456 if ( face->GetNodeIndex( _nodes.back() ) >= 0 ||
7457 face->GetNodeIndex( _nodes[0] ) >= 0 )
7458 continue; // face sharing _LayerEdge node
7459 const int nbNodes = face->NbCornerNodes();
7460 bool intFound = false;
7462 SMDS_MeshElement::iterator nIt = face->begin_nodes();
7465 intFound = SegTriaInter( lastSegment, *nIt++, *nIt++, *nIt++, dist, epsilon );
7469 const SMDS_MeshNode* tria[3];
7472 for ( int n2 = 2; n2 < nbNodes && !intFound; ++n2 )
7475 intFound = SegTriaInter(lastSegment, tria[0], tria[1], tria[2], dist, epsilon );
7481 if ( dist < segLen*(1.01) && dist > -(_len*_lenFactor-segLen) )
7482 segmentIntersected = true;
7483 if ( distance > dist )
7484 distance = dist, iFace = j;
7487 if ( intFace ) *intFace = ( iFace != -1 ) ? suspectFaces[iFace] : 0;
7491 if ( segmentIntersected )
7494 SMDS_MeshElement::iterator nIt = suspectFaces[iFace]->begin_nodes();
7495 gp_XYZ intP( lastSegment.Location().XYZ() + lastSegment.Direction().XYZ() * ( distance+segLen ));
7496 cout << "nodes: tgt " << _nodes.back()->GetID() << " src " << _nodes[0]->GetID()
7497 << ", intersection with face ("
7498 << (*nIt++)->GetID()<<" "<< (*nIt++)->GetID()<<" "<< (*nIt++)->GetID()
7499 << ") at point (" << intP.X() << ", " << intP.Y() << ", " << intP.Z()
7500 << ") distance = " << distance << endl;
7504 return segmentIntersected;
7507 //================================================================================
7509 * \brief Returns a point used to check orientation of _simplices
7511 //================================================================================
7513 gp_XYZ _LayerEdge::PrevCheckPos( _EdgesOnShape* eos ) const
7515 size_t i = Is( NORMAL_UPDATED ) ? _pos.size()-2 : 0;
7517 if ( !eos || eos->_sWOL.IsNull() )
7520 if ( eos->SWOLType() == TopAbs_EDGE )
7522 return BRepAdaptor_Curve( TopoDS::Edge( eos->_sWOL )).Value( _pos[i].X() ).XYZ();
7524 //else // TopAbs_FACE
7526 return BRepAdaptor_Surface( TopoDS::Face( eos->_sWOL )).Value(_pos[i].X(), _pos[i].Y() ).XYZ();
7529 //================================================================================
7531 * \brief Returns size and direction of the last segment
7533 //================================================================================
7535 gp_Ax1 _LayerEdge::LastSegment(double& segLen, _EdgesOnShape& eos) const
7537 // find two non-coincident positions
7538 gp_XYZ orig = _pos.back();
7540 int iPrev = _pos.size() - 2;
7541 //const double tol = ( _len > 0 ) ? 0.3*_len : 1e-100; // adjusted for IPAL52478 + PAL22576
7542 const double tol = ( _len > 0 ) ? ( 1e-6 * _len ) : 1e-100;
7543 while ( iPrev >= 0 )
7545 vec = orig - _pos[iPrev];
7546 if ( vec.SquareModulus() > tol*tol )
7556 segDir.SetLocation( SMESH_TNodeXYZ( _nodes[0] ));
7557 segDir.SetDirection( _normal );
7562 gp_Pnt pPrev = _pos[ iPrev ];
7563 if ( !eos._sWOL.IsNull() )
7565 TopLoc_Location loc;
7566 if ( eos.SWOLType() == TopAbs_EDGE )
7569 Handle(Geom_Curve) curve = BRep_Tool::Curve( TopoDS::Edge( eos._sWOL ), loc, f,l);
7570 pPrev = curve->Value( pPrev.X() ).Transformed( loc );
7574 Handle(Geom_Surface) surface = BRep_Tool::Surface( TopoDS::Face( eos._sWOL ), loc );
7575 pPrev = surface->Value( pPrev.X(), pPrev.Y() ).Transformed( loc );
7577 vec = SMESH_TNodeXYZ( _nodes.back() ) - pPrev.XYZ();
7579 segDir.SetLocation( pPrev );
7580 segDir.SetDirection( vec );
7581 segLen = vec.Modulus();
7587 //================================================================================
7589 * \brief Return the last position of the target node on a FACE.
7590 * \param [in] F - the FACE this _LayerEdge is inflated along
7591 * \return gp_XY - result UV
7593 //================================================================================
7595 gp_XY _LayerEdge::LastUV( const TopoDS_Face& F, _EdgesOnShape& eos ) const
7597 if ( F.IsSame( eos._sWOL )) // F is my FACE
7598 return gp_XY( _pos.back().X(), _pos.back().Y() );
7600 if ( eos.SWOLType() != TopAbs_EDGE ) // wrong call
7601 return gp_XY( 1e100, 1e100 );
7603 // _sWOL is EDGE of F; _pos.back().X() is the last U on the EDGE
7604 double f, l, u = _pos.back().X();
7605 Handle(Geom2d_Curve) C2d = BRep_Tool::CurveOnSurface( TopoDS::Edge(eos._sWOL), F, f,l);
7606 if ( !C2d.IsNull() && f <= u && u <= l )
7607 return C2d->Value( u ).XY();
7609 return gp_XY( 1e100, 1e100 );
7612 //================================================================================
7614 * \brief Test intersection of the last segment with a given triangle
7615 * using Moller-Trumbore algorithm
7616 * Intersection is detected if distance to intersection is less than _LayerEdge._len
7618 //================================================================================
7620 bool _LayerEdge::SegTriaInter( const gp_Ax1& lastSegment,
7621 const gp_XYZ& vert0,
7622 const gp_XYZ& vert1,
7623 const gp_XYZ& vert2,
7625 const double& EPSILON) const
7627 const gp_Pnt& orig = lastSegment.Location();
7628 const gp_Dir& dir = lastSegment.Direction();
7630 /* calculate distance from vert0 to ray origin */
7631 //gp_XYZ tvec = orig.XYZ() - vert0;
7633 //if ( tvec * dir > EPSILON )
7634 // intersected face is at back side of the temporary face this _LayerEdge belongs to
7637 gp_XYZ edge1 = vert1 - vert0;
7638 gp_XYZ edge2 = vert2 - vert0;
7640 /* begin calculating determinant - also used to calculate U parameter */
7641 gp_XYZ pvec = dir.XYZ() ^ edge2;
7643 /* if determinant is near zero, ray lies in plane of triangle */
7644 double det = edge1 * pvec;
7646 const double ANGL_EPSILON = 1e-12;
7647 if ( det > -ANGL_EPSILON && det < ANGL_EPSILON )
7650 /* calculate distance from vert0 to ray origin */
7651 gp_XYZ tvec = orig.XYZ() - vert0;
7653 /* calculate U parameter and test bounds */
7654 double u = ( tvec * pvec ) / det;
7655 //if (u < 0.0 || u > 1.0)
7656 if ( u < -EPSILON || u > 1.0 + EPSILON )
7659 /* prepare to test V parameter */
7660 gp_XYZ qvec = tvec ^ edge1;
7662 /* calculate V parameter and test bounds */
7663 double v = (dir.XYZ() * qvec) / det;
7664 //if ( v < 0.0 || u + v > 1.0 )
7665 if ( v < -EPSILON || u + v > 1.0 + EPSILON )
7668 /* calculate t, ray intersects triangle */
7669 t = (edge2 * qvec) / det;
7675 //================================================================================
7677 * \brief _LayerEdge, located at a concave VERTEX of a FACE, moves target nodes of
7678 * neighbor _LayerEdge's by it's own inflation vector.
7679 * \param [in] eov - EOS of the VERTEX
7680 * \param [in] eos - EOS of the FACE
7681 * \param [in] step - inflation step
7682 * \param [in,out] badSmooEdges - not untangled _LayerEdge's
7684 //================================================================================
7686 void _LayerEdge::MoveNearConcaVer( const _EdgesOnShape* eov,
7687 const _EdgesOnShape* eos,
7689 vector< _LayerEdge* > & badSmooEdges )
7691 // check if any of _neibors is in badSmooEdges
7692 if ( std::find_first_of( _neibors.begin(), _neibors.end(),
7693 badSmooEdges.begin(), badSmooEdges.end() ) == _neibors.end() )
7696 // get all edges to move
7698 set< _LayerEdge* > edges;
7700 // find a distance between _LayerEdge on VERTEX and its neighbors
7701 gp_XYZ curPosV = SMESH_TNodeXYZ( _nodes.back() );
7703 for ( size_t i = 0; i < _neibors.size(); ++i )
7705 _LayerEdge* nEdge = _neibors[i];
7706 if ( nEdge->_nodes[0]->getshapeId() == eos->_shapeID )
7708 edges.insert( nEdge );
7709 dist2 = Max( dist2, ( curPosV - nEdge->_pos.back() ).SquareModulus() );
7712 // add _LayerEdge's close to curPosV
7716 for ( set< _LayerEdge* >::iterator e = edges.begin(); e != edges.end(); ++e )
7718 _LayerEdge* edgeF = *e;
7719 for ( size_t i = 0; i < edgeF->_neibors.size(); ++i )
7721 _LayerEdge* nEdge = edgeF->_neibors[i];
7722 if ( nEdge->_nodes[0]->getshapeId() == eos->_shapeID &&
7723 dist2 > ( curPosV - nEdge->_pos.back() ).SquareModulus() )
7724 edges.insert( nEdge );
7728 while ( nbE < edges.size() );
7730 // move the target node of the got edges
7732 gp_XYZ prevPosV = PrevPos();
7733 if ( eov->SWOLType() == TopAbs_EDGE )
7735 BRepAdaptor_Curve curve ( TopoDS::Edge( eov->_sWOL ));
7736 prevPosV = curve.Value( prevPosV.X() ).XYZ();
7738 else if ( eov->SWOLType() == TopAbs_FACE )
7740 BRepAdaptor_Surface surface( TopoDS::Face( eov->_sWOL ));
7741 prevPosV = surface.Value( prevPosV.X(), prevPosV.Y() ).XYZ();
7744 SMDS_FacePosition* fPos;
7745 //double r = 1. - Min( 0.9, step / 10. );
7746 for ( set< _LayerEdge* >::iterator e = edges.begin(); e != edges.end(); ++e )
7748 _LayerEdge* edgeF = *e;
7749 const gp_XYZ prevVF = edgeF->PrevPos() - prevPosV;
7750 const gp_XYZ newPosF = curPosV + prevVF;
7751 SMDS_MeshNode* tgtNodeF = const_cast<SMDS_MeshNode*>( edgeF->_nodes.back() );
7752 tgtNodeF->setXYZ( newPosF.X(), newPosF.Y(), newPosF.Z() );
7753 edgeF->_pos.back() = newPosF;
7754 dumpMoveComm( tgtNodeF, "MoveNearConcaVer" ); // debug
7756 // set _curvature to make edgeF updated by putOnOffsetSurface()
7757 if ( !edgeF->_curvature )
7758 if (( fPos = dynamic_cast<SMDS_FacePosition*>( edgeF->_nodes[0]->GetPosition() )))
7760 edgeF->_curvature = new _Curvature;
7761 edgeF->_curvature->_r = 0;
7762 edgeF->_curvature->_k = 0;
7763 edgeF->_curvature->_h2lenRatio = 0;
7764 edgeF->_curvature->_uv.SetCoord( fPos->GetUParameter(), fPos->GetVParameter() );
7767 // gp_XYZ inflationVec( SMESH_TNodeXYZ( _nodes.back() ) -
7768 // SMESH_TNodeXYZ( _nodes[0] ));
7769 // for ( set< _LayerEdge* >::iterator e = edges.begin(); e != edges.end(); ++e )
7771 // _LayerEdge* edgeF = *e;
7772 // gp_XYZ newPos = SMESH_TNodeXYZ( edgeF->_nodes[0] ) + inflationVec;
7773 // SMDS_MeshNode* tgtNode = const_cast<SMDS_MeshNode*>( edgeF->_nodes.back() );
7774 // tgtNode->setXYZ( newPos.X(), newPos.Y(), newPos.Z() );
7775 // edgeF->_pos.back() = newPosF;
7776 // dumpMoveComm( tgtNode, "MoveNearConcaVer" ); // debug
7779 // smooth _LayerEdge's around moved nodes
7780 //size_t nbBadBefore = badSmooEdges.size();
7781 for ( set< _LayerEdge* >::iterator e = edges.begin(); e != edges.end(); ++e )
7783 _LayerEdge* edgeF = *e;
7784 for ( size_t j = 0; j < edgeF->_neibors.size(); ++j )
7785 if ( edgeF->_neibors[j]->_nodes[0]->getshapeId() == eos->_shapeID )
7786 //&& !edges.count( edgeF->_neibors[j] ))
7788 _LayerEdge* edgeFN = edgeF->_neibors[j];
7789 edgeFN->Unset( SMOOTHED );
7790 int nbBad = edgeFN->Smooth( step, /*isConcaFace=*/true, /*findBest=*/true );
7793 // gp_XYZ newPos = SMESH_TNodeXYZ( edgeFN->_nodes[0] ) + inflationVec;
7794 // const gp_XYZ& prevPos = edgeFN->_pos[ edgeFN->_pos.size()-2 ];
7795 // int nbBadAfter = edgeFN->_simplices.size();
7797 // for ( size_t iS = 0; iS < edgeFN->_simplices.size(); ++iS )
7799 // nbBadAfter -= edgeFN->_simplices[iS].IsForward( &prevPos, &newPos, vol );
7801 // if ( nbBadAfter <= nbBad )
7803 // SMDS_MeshNode* tgtNode = const_cast<SMDS_MeshNode*>( edgeFN->_nodes.back() );
7804 // tgtNode->setXYZ( newPos.X(), newPos.Y(), newPos.Z() );
7805 // edgeF->_pos.back() = newPosF;
7806 // dumpMoveComm( tgtNode, "MoveNearConcaVer 2" ); // debug
7807 // nbBad = nbBadAfter;
7811 badSmooEdges.push_back( edgeFN );
7814 // move a bit not smoothed around moved nodes
7815 // for ( size_t i = nbBadBefore; i < badSmooEdges.size(); ++i )
7817 // _LayerEdge* edgeF = badSmooEdges[i];
7818 // SMDS_MeshNode* tgtNode = const_cast<SMDS_MeshNode*>( edgeF->_nodes.back() );
7819 // gp_XYZ newPos1 = SMESH_TNodeXYZ( edgeF->_nodes[0] ) + inflationVec;
7820 // gp_XYZ newPos2 = 0.5 * ( newPos1 + SMESH_TNodeXYZ( tgtNode ));
7821 // tgtNode->setXYZ( newPos2.X(), newPos2.Y(), newPos2.Z() );
7822 // edgeF->_pos.back() = newPosF;
7823 // dumpMoveComm( tgtNode, "MoveNearConcaVer 2" ); // debug
7827 //================================================================================
7829 * \brief Perform smooth of _LayerEdge's based on EDGE's
7830 * \retval bool - true if node has been moved
7832 //================================================================================
7834 bool _LayerEdge::SmoothOnEdge(Handle(ShapeAnalysis_Surface)& surface,
7835 const TopoDS_Face& F,
7836 SMESH_MesherHelper& helper)
7838 ASSERT( IsOnEdge() );
7840 SMDS_MeshNode* tgtNode = const_cast<SMDS_MeshNode*>( _nodes.back() );
7841 SMESH_TNodeXYZ oldPos( tgtNode );
7842 double dist01, distNewOld;
7844 SMESH_TNodeXYZ p0( _2neibors->tgtNode(0));
7845 SMESH_TNodeXYZ p1( _2neibors->tgtNode(1));
7846 dist01 = p0.Distance( _2neibors->tgtNode(1) );
7848 gp_Pnt newPos = p0 * _2neibors->_wgt[0] + p1 * _2neibors->_wgt[1];
7849 double lenDelta = 0;
7852 //lenDelta = _curvature->lenDelta( _len );
7853 lenDelta = _curvature->lenDeltaByDist( dist01 );
7854 newPos.ChangeCoord() += _normal * lenDelta;
7857 distNewOld = newPos.Distance( oldPos );
7861 if ( _2neibors->_plnNorm )
7863 // put newPos on the plane defined by source node and _plnNorm
7864 gp_XYZ new2src = SMESH_TNodeXYZ( _nodes[0] ) - newPos.XYZ();
7865 double new2srcProj = (*_2neibors->_plnNorm) * new2src;
7866 newPos.ChangeCoord() += (*_2neibors->_plnNorm) * new2srcProj;
7868 tgtNode->setXYZ( newPos.X(), newPos.Y(), newPos.Z() );
7869 _pos.back() = newPos.XYZ();
7873 tgtNode->setXYZ( newPos.X(), newPos.Y(), newPos.Z() );
7874 gp_XY uv( Precision::Infinite(), 0 );
7875 helper.CheckNodeUV( F, tgtNode, uv, 1e-10, /*force=*/true );
7876 _pos.back().SetCoord( uv.X(), uv.Y(), 0 );
7878 newPos = surface->Value( uv );
7879 tgtNode->setXYZ( newPos.X(), newPos.Y(), newPos.Z() );
7882 // commented for IPAL0052478
7883 // if ( _curvature && lenDelta < 0 )
7885 // gp_Pnt prevPos( _pos[ _pos.size()-2 ]);
7886 // _len -= prevPos.Distance( oldPos );
7887 // _len += prevPos.Distance( newPos );
7889 bool moved = distNewOld > dist01/50;
7891 dumpMove( tgtNode ); // debug
7896 //================================================================================
7898 * \brief Perform 3D smooth of nodes inflated from FACE. No check of validity
7900 //================================================================================
7902 void _LayerEdge::SmoothWoCheck()
7904 if ( Is( DIFFICULT ))
7907 bool moved = Is( SMOOTHED );
7908 for ( size_t i = 0; i < _neibors.size() && !moved; ++i )
7909 moved = _neibors[i]->Is( SMOOTHED );
7913 gp_XYZ newPos = (this->*_smooFunction)(); // fun chosen by ChooseSmooFunction()
7915 SMDS_MeshNode* n = const_cast< SMDS_MeshNode* >( _nodes.back() );
7916 n->setXYZ( newPos.X(), newPos.Y(), newPos.Z());
7917 _pos.back() = newPos;
7919 dumpMoveComm( n, SMESH_Comment("No check - ") << _funNames[ smooFunID() ]);
7922 //================================================================================
7924 * \brief Checks validity of _neibors on EDGEs and VERTEXes
7926 //================================================================================
7928 int _LayerEdge::CheckNeiborsOnBoundary( vector< _LayerEdge* >* badNeibors, bool * needSmooth )
7930 if ( ! Is( NEAR_BOUNDARY ))
7935 for ( size_t iN = 0; iN < _neibors.size(); ++iN )
7937 _LayerEdge* eN = _neibors[iN];
7938 if ( eN->_nodes[0]->getshapeId() == _nodes[0]->getshapeId() )
7941 *needSmooth |= ( eN->Is( _LayerEdge::BLOCKED ) ||
7942 eN->Is( _LayerEdge::NORMAL_UPDATED ) ||
7943 eN->_pos.size() != _pos.size() );
7945 SMESH_TNodeXYZ curPosN ( eN->_nodes.back() );
7946 SMESH_TNodeXYZ prevPosN( eN->_nodes[0] );
7947 for ( size_t i = 0; i < eN->_simplices.size(); ++i )
7948 if ( eN->_nodes.size() > 1 &&
7949 eN->_simplices[i].Includes( _nodes.back() ) &&
7950 !eN->_simplices[i].IsForward( &prevPosN, &curPosN, vol ))
7955 badNeibors->push_back( eN );
7956 debugMsg("Bad boundary simplex ( "
7957 << " "<< eN->_nodes[0]->GetID()
7958 << " "<< eN->_nodes.back()->GetID()
7959 << " "<< eN->_simplices[i]._nPrev->GetID()
7960 << " "<< eN->_simplices[i]._nNext->GetID() << " )" );
7971 //================================================================================
7973 * \brief Perform 'smart' 3D smooth of nodes inflated from FACE
7974 * \retval int - nb of bad simplices around this _LayerEdge
7976 //================================================================================
7978 int _LayerEdge::Smooth(const int step, bool findBest, vector< _LayerEdge* >& toSmooth )
7980 if ( !Is( MOVED ) || Is( SMOOTHED ) || Is( BLOCKED ))
7981 return 0; // shape of simplices not changed
7982 if ( _simplices.size() < 2 )
7983 return 0; // _LayerEdge inflated along EDGE or FACE
7985 if ( Is( DIFFICULT )) // || Is( ON_CONCAVE_FACE )
7988 const gp_XYZ& curPos = _pos.back();
7989 const gp_XYZ& prevPos = _pos[0]; //PrevPos();
7991 // quality metrics (orientation) of tetras around _tgtNode
7993 double vol, minVolBefore = 1e100;
7994 for ( size_t i = 0; i < _simplices.size(); ++i )
7996 nbOkBefore += _simplices[i].IsForward( &prevPos, &curPos, vol );
7997 minVolBefore = Min( minVolBefore, vol );
7999 int nbBad = _simplices.size() - nbOkBefore;
8001 bool bndNeedSmooth = false;
8003 nbBad = CheckNeiborsOnBoundary( 0, & bndNeedSmooth );
8007 // evaluate min angle
8008 if ( nbBad == 0 && !findBest && !bndNeedSmooth )
8010 size_t nbGoodAngles = _simplices.size();
8012 for ( size_t i = 0; i < _simplices.size(); ++i )
8014 if ( !_simplices[i].IsMinAngleOK( curPos, angle ) && angle > _minAngle )
8017 if ( nbGoodAngles == _simplices.size() )
8023 if ( Is( ON_CONCAVE_FACE ))
8026 if ( step % 2 == 0 )
8029 if ( Is( ON_CONCAVE_FACE ) && !findBest ) // alternate FUN_CENTROIDAL and FUN_LAPLACIAN
8031 if ( _smooFunction == _funs[ FUN_LAPLACIAN ] )
8032 _smooFunction = _funs[ FUN_CENTROIDAL ];
8034 _smooFunction = _funs[ FUN_LAPLACIAN ];
8037 // compute new position for the last _pos using different _funs
8040 for ( int iFun = -1; iFun < theNbSmooFuns; ++iFun )
8043 newPos = (this->*_smooFunction)(); // fun chosen by ChooseSmooFunction()
8044 else if ( _funs[ iFun ] == _smooFunction )
8045 continue; // _smooFunction again
8046 else if ( step > 1 )
8047 newPos = (this->*_funs[ iFun ])(); // try other smoothing fun
8049 break; // let "easy" functions improve elements around distorted ones
8053 double delta = _curvature->lenDelta( _len );
8055 newPos += _normal * delta;
8058 double segLen = _normal * ( newPos - prevPos );
8059 if ( segLen + delta > 0 )
8060 newPos += _normal * delta;
8062 // double segLenChange = _normal * ( curPos - newPos );
8063 // newPos += 0.5 * _normal * segLenChange;
8067 double minVolAfter = 1e100;
8068 for ( size_t i = 0; i < _simplices.size(); ++i )
8070 nbOkAfter += _simplices[i].IsForward( &prevPos, &newPos, vol );
8071 minVolAfter = Min( minVolAfter, vol );
8074 if ( nbOkAfter < nbOkBefore )
8078 ( nbOkAfter == nbOkBefore ) &&
8079 ( minVolAfter <= minVolBefore ))
8082 nbBad = _simplices.size() - nbOkAfter;
8083 minVolBefore = minVolAfter;
8084 nbOkBefore = nbOkAfter;
8087 SMDS_MeshNode* n = const_cast< SMDS_MeshNode* >( _nodes.back() );
8088 n->setXYZ( newPos.X(), newPos.Y(), newPos.Z());
8089 _pos.back() = newPos;
8091 dumpMoveComm( n, SMESH_Comment( _funNames[ iFun < 0 ? smooFunID() : iFun ] )
8092 << (nbBad ? " --BAD" : ""));
8096 continue; // look for a better function
8102 } // loop on smoothing functions
8104 if ( moved ) // notify _neibors
8107 for ( size_t i = 0; i < _neibors.size(); ++i )
8108 if ( !_neibors[i]->Is( MOVED ))
8110 _neibors[i]->Set( MOVED );
8111 toSmooth.push_back( _neibors[i] );
8118 //================================================================================
8120 * \brief Perform 'smart' 3D smooth of nodes inflated from FACE
8121 * \retval int - nb of bad simplices around this _LayerEdge
8123 //================================================================================
8125 int _LayerEdge::Smooth(const int step, const bool isConcaveFace, bool findBest )
8127 if ( !_smooFunction )
8128 return 0; // _LayerEdge inflated along EDGE or FACE
8130 return 0; // not inflated
8132 const gp_XYZ& curPos = _pos.back();
8133 const gp_XYZ& prevPos = _pos[0]; //PrevCheckPos();
8135 // quality metrics (orientation) of tetras around _tgtNode
8137 double vol, minVolBefore = 1e100;
8138 for ( size_t i = 0; i < _simplices.size(); ++i )
8140 nbOkBefore += _simplices[i].IsForward( &prevPos, &curPos, vol );
8141 minVolBefore = Min( minVolBefore, vol );
8143 int nbBad = _simplices.size() - nbOkBefore;
8145 if ( isConcaveFace ) // alternate FUN_CENTROIDAL and FUN_LAPLACIAN
8147 if ( _smooFunction == _funs[ FUN_CENTROIDAL ] && step % 2 )
8148 _smooFunction = _funs[ FUN_LAPLACIAN ];
8149 else if ( _smooFunction == _funs[ FUN_LAPLACIAN ] && !( step % 2 ))
8150 _smooFunction = _funs[ FUN_CENTROIDAL ];
8153 // compute new position for the last _pos using different _funs
8155 for ( int iFun = -1; iFun < theNbSmooFuns; ++iFun )
8158 newPos = (this->*_smooFunction)(); // fun chosen by ChooseSmooFunction()
8159 else if ( _funs[ iFun ] == _smooFunction )
8160 continue; // _smooFunction again
8161 else if ( step > 1 )
8162 newPos = (this->*_funs[ iFun ])(); // try other smoothing fun
8164 break; // let "easy" functions improve elements around distorted ones
8168 double delta = _curvature->lenDelta( _len );
8170 newPos += _normal * delta;
8173 double segLen = _normal * ( newPos - prevPos );
8174 if ( segLen + delta > 0 )
8175 newPos += _normal * delta;
8177 // double segLenChange = _normal * ( curPos - newPos );
8178 // newPos += 0.5 * _normal * segLenChange;
8182 double minVolAfter = 1e100;
8183 for ( size_t i = 0; i < _simplices.size(); ++i )
8185 nbOkAfter += _simplices[i].IsForward( &prevPos, &newPos, vol );
8186 minVolAfter = Min( minVolAfter, vol );
8189 if ( nbOkAfter < nbOkBefore )
8191 if (( isConcaveFace || findBest ) &&
8192 ( nbOkAfter == nbOkBefore ) &&
8193 ( minVolAfter <= minVolBefore )
8197 nbBad = _simplices.size() - nbOkAfter;
8198 minVolBefore = minVolAfter;
8199 nbOkBefore = nbOkAfter;
8201 SMDS_MeshNode* n = const_cast< SMDS_MeshNode* >( _nodes.back() );
8202 n->setXYZ( newPos.X(), newPos.Y(), newPos.Z());
8203 _pos.back() = newPos;
8205 dumpMoveComm( n, SMESH_Comment( _funNames[ iFun < 0 ? smooFunID() : iFun ] )
8206 << ( nbBad ? "--BAD" : ""));
8208 // commented for IPAL0052478
8209 // _len -= prevPos.Distance(SMESH_TNodeXYZ( n ));
8210 // _len += prevPos.Distance(newPos);
8212 if ( iFun > -1 ) // findBest || the chosen _fun makes worse
8214 //_smooFunction = _funs[ iFun ];
8215 // cout << "# " << _funNames[ iFun ] << "\t N:" << _nodes.back()->GetID()
8216 // << "\t nbBad: " << _simplices.size() - nbOkAfter
8217 // << " minVol: " << minVolAfter
8218 // << " " << newPos.X() << " " << newPos.Y() << " " << newPos.Z()
8220 continue; // look for a better function
8226 } // loop on smoothing functions
8231 //================================================================================
8233 * \brief Chooses a smoothing technic giving a position most close to an initial one.
8234 * For a correct result, _simplices must contain nodes lying on geometry.
8236 //================================================================================
8238 void _LayerEdge::ChooseSmooFunction( const set< TGeomID >& concaveVertices,
8239 const TNode2Edge& n2eMap)
8241 if ( _smooFunction ) return;
8243 // use smoothNefPolygon() near concaveVertices
8244 if ( !concaveVertices.empty() )
8246 _smooFunction = _funs[ FUN_CENTROIDAL ];
8248 Set( ON_CONCAVE_FACE );
8250 for ( size_t i = 0; i < _simplices.size(); ++i )
8252 if ( concaveVertices.count( _simplices[i]._nPrev->getshapeId() ))
8254 _smooFunction = _funs[ FUN_NEFPOLY ];
8256 // set FUN_CENTROIDAL to neighbor edges
8257 for ( i = 0; i < _neibors.size(); ++i )
8259 if ( _neibors[i]->_nodes[0]->GetPosition()->GetDim() == 2 )
8261 _neibors[i]->_smooFunction = _funs[ FUN_CENTROIDAL ];
8268 // // this coice is done only if ( !concaveVertices.empty() ) for Grids/smesh/bugs_19/X1
8269 // // where the nodes are smoothed too far along a sphere thus creating
8270 // // inverted _simplices
8271 // double dist[theNbSmooFuns];
8272 // //double coef[theNbSmooFuns] = { 1., 1.2, 1.4, 1.4 };
8273 // double coef[theNbSmooFuns] = { 1., 1., 1., 1. };
8275 // double minDist = Precision::Infinite();
8276 // gp_Pnt p = SMESH_TNodeXYZ( _nodes[0] );
8277 // for ( int i = 0; i < FUN_NEFPOLY; ++i )
8279 // gp_Pnt newP = (this->*_funs[i])();
8280 // dist[i] = p.SquareDistance( newP );
8281 // if ( dist[i]*coef[i] < minDist )
8283 // _smooFunction = _funs[i];
8284 // minDist = dist[i]*coef[i];
8290 _smooFunction = _funs[ FUN_LAPLACIAN ];
8293 // for ( size_t i = 0; i < _simplices.size(); ++i )
8294 // minDim = Min( minDim, _simplices[i]._nPrev->GetPosition()->GetDim() );
8295 // if ( minDim == 0 )
8296 // _smooFunction = _funs[ FUN_CENTROIDAL ];
8297 // else if ( minDim == 1 )
8298 // _smooFunction = _funs[ FUN_CENTROIDAL ];
8302 // for ( int i = 0; i < FUN_NB; ++i )
8304 // //cout << dist[i] << " ";
8305 // if ( _smooFunction == _funs[i] ) {
8307 // //debugMsg( fNames[i] );
8311 // cout << _funNames[ iMin ] << "\t N:" << _nodes.back()->GetID() << endl;
8314 //================================================================================
8316 * \brief Returns a name of _SmooFunction
8318 //================================================================================
8320 int _LayerEdge::smooFunID( _LayerEdge::PSmooFun fun) const
8323 fun = _smooFunction;
8324 for ( int i = 0; i < theNbSmooFuns; ++i )
8325 if ( fun == _funs[i] )
8328 return theNbSmooFuns;
8331 //================================================================================
8333 * \brief Computes a new node position using Laplacian smoothing
8335 //================================================================================
8337 gp_XYZ _LayerEdge::smoothLaplacian()
8339 gp_XYZ newPos (0,0,0);
8340 for ( size_t i = 0; i < _simplices.size(); ++i )
8341 newPos += SMESH_TNodeXYZ( _simplices[i]._nPrev );
8342 newPos /= _simplices.size();
8347 //================================================================================
8349 * \brief Computes a new node position using angular-based smoothing
8351 //================================================================================
8353 gp_XYZ _LayerEdge::smoothAngular()
8355 vector< gp_Vec > edgeDir; edgeDir. reserve( _simplices.size() + 1 );
8356 vector< double > edgeSize; edgeSize.reserve( _simplices.size() );
8357 vector< gp_XYZ > points; points. reserve( _simplices.size() + 1 );
8359 gp_XYZ pPrev = SMESH_TNodeXYZ( _simplices.back()._nPrev );
8361 for ( size_t i = 0; i < _simplices.size(); ++i )
8363 gp_XYZ p = SMESH_TNodeXYZ( _simplices[i]._nPrev );
8364 edgeDir.push_back( p - pPrev );
8365 edgeSize.push_back( edgeDir.back().Magnitude() );
8366 if ( edgeSize.back() < numeric_limits<double>::min() )
8369 edgeSize.pop_back();
8373 edgeDir.back() /= edgeSize.back();
8374 points.push_back( p );
8379 edgeDir.push_back ( edgeDir[0] );
8380 edgeSize.push_back( edgeSize[0] );
8381 pN /= points.size();
8383 gp_XYZ newPos(0,0,0);
8385 for ( size_t i = 0; i < points.size(); ++i )
8387 gp_Vec toN = pN - points[i];
8388 double toNLen = toN.Magnitude();
8389 if ( toNLen < numeric_limits<double>::min() )
8394 gp_Vec bisec = edgeDir[i] + edgeDir[i+1];
8395 double bisecLen = bisec.SquareMagnitude();
8396 if ( bisecLen < numeric_limits<double>::min() )
8398 gp_Vec norm = edgeDir[i] ^ toN;
8399 bisec = norm ^ edgeDir[i];
8400 bisecLen = bisec.SquareMagnitude();
8402 bisecLen = Sqrt( bisecLen );
8406 gp_XYZ pNew = ( points[i] + bisec.XYZ() * toNLen ) * bisecLen;
8407 sumSize += bisecLen;
8409 gp_XYZ pNew = ( points[i] + bisec.XYZ() * toNLen ) * ( edgeSize[i] + edgeSize[i+1] );
8410 sumSize += ( edgeSize[i] + edgeSize[i+1] );
8416 // project newPos to an average plane
8418 gp_XYZ norm(0,0,0); // plane normal
8419 points.push_back( points[0] );
8420 for ( size_t i = 1; i < points.size(); ++i )
8422 gp_XYZ vec1 = points[ i-1 ] - pN;
8423 gp_XYZ vec2 = points[ i ] - pN;
8424 gp_XYZ cross = vec1 ^ vec2;
8427 if ( cross * norm < numeric_limits<double>::min() )
8428 norm += cross.Reversed();
8432 catch (Standard_Failure) { // if |cross| == 0.
8435 gp_XYZ vec = newPos - pN;
8436 double r = ( norm * vec ) / norm.SquareModulus(); // param [0,1] on norm
8437 newPos = newPos - r * norm;
8442 //================================================================================
8444 * \brief Computes a new node position using weigthed node positions
8446 //================================================================================
8448 gp_XYZ _LayerEdge::smoothLengthWeighted()
8450 vector< double > edgeSize; edgeSize.reserve( _simplices.size() + 1);
8451 vector< gp_XYZ > points; points. reserve( _simplices.size() );
8453 gp_XYZ pPrev = SMESH_TNodeXYZ( _simplices.back()._nPrev );
8454 for ( size_t i = 0; i < _simplices.size(); ++i )
8456 gp_XYZ p = SMESH_TNodeXYZ( _simplices[i]._nPrev );
8457 edgeSize.push_back( ( p - pPrev ).Modulus() );
8458 if ( edgeSize.back() < numeric_limits<double>::min() )
8460 edgeSize.pop_back();
8464 points.push_back( p );
8468 edgeSize.push_back( edgeSize[0] );
8470 gp_XYZ newPos(0,0,0);
8472 for ( size_t i = 0; i < points.size(); ++i )
8474 newPos += points[i] * ( edgeSize[i] + edgeSize[i+1] );
8475 sumSize += edgeSize[i] + edgeSize[i+1];
8481 //================================================================================
8483 * \brief Computes a new node position using angular-based smoothing
8485 //================================================================================
8487 gp_XYZ _LayerEdge::smoothCentroidal()
8489 gp_XYZ newPos(0,0,0);
8490 gp_XYZ pN = SMESH_TNodeXYZ( _nodes.back() );
8492 for ( size_t i = 0; i < _simplices.size(); ++i )
8494 gp_XYZ p1 = SMESH_TNodeXYZ( _simplices[i]._nPrev );
8495 gp_XYZ p2 = SMESH_TNodeXYZ( _simplices[i]._nNext );
8496 gp_XYZ gc = ( pN + p1 + p2 ) / 3.;
8497 double size = (( p1 - pN ) ^ ( p2 - pN )).Modulus();
8500 newPos += gc * size;
8507 //================================================================================
8509 * \brief Computes a new node position located inside a Nef polygon
8511 //================================================================================
8513 gp_XYZ _LayerEdge::smoothNefPolygon()
8514 #ifdef OLD_NEF_POLYGON
8516 gp_XYZ newPos(0,0,0);
8518 // get a plane to search a solution on
8520 vector< gp_XYZ > vecs( _simplices.size() + 1 );
8522 const double tol = numeric_limits<double>::min();
8523 gp_XYZ center(0,0,0);
8524 for ( i = 0; i < _simplices.size(); ++i )
8526 vecs[i] = ( SMESH_TNodeXYZ( _simplices[i]._nNext ) -
8527 SMESH_TNodeXYZ( _simplices[i]._nPrev ));
8528 center += SMESH_TNodeXYZ( _simplices[i]._nPrev );
8530 vecs.back() = vecs[0];
8531 center /= _simplices.size();
8533 gp_XYZ zAxis(0,0,0);
8534 for ( i = 0; i < _simplices.size(); ++i )
8535 zAxis += vecs[i] ^ vecs[i+1];
8538 for ( i = 0; i < _simplices.size(); ++i )
8541 if ( yAxis.SquareModulus() > tol )
8544 gp_XYZ xAxis = yAxis ^ zAxis;
8545 // SMESH_TNodeXYZ p0( _simplices[0]._nPrev );
8546 // const double tol = 1e-6 * ( p0.Distance( _simplices[1]._nPrev ) +
8547 // p0.Distance( _simplices[2]._nPrev ));
8548 // gp_XYZ center = smoothLaplacian();
8549 // gp_XYZ xAxis, yAxis, zAxis;
8550 // for ( i = 0; i < _simplices.size(); ++i )
8552 // xAxis = SMESH_TNodeXYZ( _simplices[i]._nPrev ) - center;
8553 // if ( xAxis.SquareModulus() > tol*tol )
8556 // for ( i = 1; i < _simplices.size(); ++i )
8558 // yAxis = SMESH_TNodeXYZ( _simplices[i]._nPrev ) - center;
8559 // zAxis = xAxis ^ yAxis;
8560 // if ( zAxis.SquareModulus() > tol*tol )
8563 // if ( i == _simplices.size() ) return newPos;
8565 yAxis = zAxis ^ xAxis;
8566 xAxis /= xAxis.Modulus();
8567 yAxis /= yAxis.Modulus();
8569 // get half-planes of _simplices
8571 vector< _halfPlane > halfPlns( _simplices.size() );
8573 for ( size_t i = 0; i < _simplices.size(); ++i )
8575 gp_XYZ OP1 = SMESH_TNodeXYZ( _simplices[i]._nPrev ) - center;
8576 gp_XYZ OP2 = SMESH_TNodeXYZ( _simplices[i]._nNext ) - center;
8577 gp_XY p1( OP1 * xAxis, OP1 * yAxis );
8578 gp_XY p2( OP2 * xAxis, OP2 * yAxis );
8579 gp_XY vec12 = p2 - p1;
8580 double dist12 = vec12.Modulus();
8584 halfPlns[ nbHP ]._pos = p1;
8585 halfPlns[ nbHP ]._dir = vec12;
8586 halfPlns[ nbHP ]._inNorm.SetCoord( -vec12.Y(), vec12.X() );
8590 // intersect boundaries of half-planes, define state of intersection points
8591 // in relation to all half-planes and calculate internal point of a 2D polygon
8594 gp_XY newPos2D (0,0);
8596 enum { UNDEF = -1, NOT_OUT, IS_OUT, NO_INT };
8597 typedef std::pair< gp_XY, int > TIntPntState; // coord and isOut state
8598 TIntPntState undefIPS( gp_XY(1e100,1e100), UNDEF );
8600 vector< vector< TIntPntState > > allIntPnts( nbHP );
8601 for ( int iHP1 = 0; iHP1 < nbHP; ++iHP1 )
8603 vector< TIntPntState > & intPnts1 = allIntPnts[ iHP1 ];
8604 if ( intPnts1.empty() ) intPnts1.resize( nbHP, undefIPS );
8606 int iPrev = SMESH_MesherHelper::WrapIndex( iHP1 - 1, nbHP );
8607 int iNext = SMESH_MesherHelper::WrapIndex( iHP1 + 1, nbHP );
8610 const gp_XY* segEnds[2] = { 0, 0 }; // NOT_OUT points
8612 for ( int iHP2 = 0; iHP2 < nbHP; ++iHP2 )
8614 if ( iHP1 == iHP2 ) continue;
8616 TIntPntState & ips1 = intPnts1[ iHP2 ];
8617 if ( ips1.second == UNDEF )
8619 // find an intersection point of boundaries of iHP1 and iHP2
8621 if ( iHP2 == iPrev ) // intersection with neighbors is known
8622 ips1.first = halfPlns[ iHP1 ]._pos;
8623 else if ( iHP2 == iNext )
8624 ips1.first = halfPlns[ iHP2 ]._pos;
8625 else if ( !halfPlns[ iHP1 ].FindIntersection( halfPlns[ iHP2 ], ips1.first ))
8626 ips1.second = NO_INT;
8628 // classify the found intersection point
8629 if ( ips1.second != NO_INT )
8631 ips1.second = NOT_OUT;
8632 for ( int i = 0; i < nbHP && ips1.second == NOT_OUT; ++i )
8633 if ( i != iHP1 && i != iHP2 &&
8634 halfPlns[ i ].IsOut( ips1.first, tol ))
8635 ips1.second = IS_OUT;
8637 vector< TIntPntState > & intPnts2 = allIntPnts[ iHP2 ];
8638 if ( intPnts2.empty() ) intPnts2.resize( nbHP, undefIPS );
8639 TIntPntState & ips2 = intPnts2[ iHP1 ];
8642 if ( ips1.second == NOT_OUT )
8645 segEnds[ bool(segEnds[0]) ] = & ips1.first;
8649 // find a NOT_OUT segment of boundary which is located between
8650 // two NOT_OUT int points
8653 continue; // no such a segment
8657 // sort points along the boundary
8658 map< double, TIntPntState* > ipsByParam;
8659 for ( int iHP2 = 0; iHP2 < nbHP; ++iHP2 )
8661 TIntPntState & ips1 = intPnts1[ iHP2 ];
8662 if ( ips1.second != NO_INT )
8664 gp_XY op = ips1.first - halfPlns[ iHP1 ]._pos;
8665 double param = op * halfPlns[ iHP1 ]._dir;
8666 ipsByParam.insert( make_pair( param, & ips1 ));
8669 // look for two neighboring NOT_OUT points
8671 map< double, TIntPntState* >::iterator u2ips = ipsByParam.begin();
8672 for ( ; u2ips != ipsByParam.end(); ++u2ips )
8674 TIntPntState & ips1 = *(u2ips->second);
8675 if ( ips1.second == NOT_OUT )
8676 segEnds[ bool( nbNotOut++ ) ] = & ips1.first;
8677 else if ( nbNotOut >= 2 )
8684 if ( nbNotOut >= 2 )
8686 double len = ( *segEnds[0] - *segEnds[1] ).Modulus();
8689 newPos2D += 0.5 * len * ( *segEnds[0] + *segEnds[1] );
8696 newPos = center + xAxis * newPos2D.X() + yAxis * newPos2D.Y();
8705 #else // OLD_NEF_POLYGON
8706 { ////////////////////////////////// NEW
8707 gp_XYZ newPos(0,0,0);
8709 // get a plane to search a solution on
8712 gp_XYZ center(0,0,0);
8713 for ( i = 0; i < _simplices.size(); ++i )
8714 center += SMESH_TNodeXYZ( _simplices[i]._nPrev );
8715 center /= _simplices.size();
8717 vector< gp_XYZ > vecs( _simplices.size() + 1 );
8718 for ( i = 0; i < _simplices.size(); ++i )
8719 vecs[i] = SMESH_TNodeXYZ( _simplices[i]._nPrev ) - center;
8720 vecs.back() = vecs[0];
8722 const double tol = numeric_limits<double>::min();
8723 gp_XYZ zAxis(0,0,0);
8724 for ( i = 0; i < _simplices.size(); ++i )
8726 gp_XYZ cross = vecs[i] ^ vecs[i+1];
8729 if ( cross * zAxis < tol )
8730 zAxis += cross.Reversed();
8734 catch (Standard_Failure) { // if |cross| == 0.
8739 for ( i = 0; i < _simplices.size(); ++i )
8742 if ( yAxis.SquareModulus() > tol )
8745 gp_XYZ xAxis = yAxis ^ zAxis;
8746 // SMESH_TNodeXYZ p0( _simplices[0]._nPrev );
8747 // const double tol = 1e-6 * ( p0.Distance( _simplices[1]._nPrev ) +
8748 // p0.Distance( _simplices[2]._nPrev ));
8749 // gp_XYZ center = smoothLaplacian();
8750 // gp_XYZ xAxis, yAxis, zAxis;
8751 // for ( i = 0; i < _simplices.size(); ++i )
8753 // xAxis = SMESH_TNodeXYZ( _simplices[i]._nPrev ) - center;
8754 // if ( xAxis.SquareModulus() > tol*tol )
8757 // for ( i = 1; i < _simplices.size(); ++i )
8759 // yAxis = SMESH_TNodeXYZ( _simplices[i]._nPrev ) - center;
8760 // zAxis = xAxis ^ yAxis;
8761 // if ( zAxis.SquareModulus() > tol*tol )
8764 // if ( i == _simplices.size() ) return newPos;
8766 yAxis = zAxis ^ xAxis;
8767 xAxis /= xAxis.Modulus();
8768 yAxis /= yAxis.Modulus();
8770 // get half-planes of _simplices
8772 vector< _halfPlane > halfPlns( _simplices.size() );
8774 for ( size_t i = 0; i < _simplices.size(); ++i )
8776 const gp_XYZ& OP1 = vecs[ i ];
8777 const gp_XYZ& OP2 = vecs[ i+1 ];
8778 gp_XY p1( OP1 * xAxis, OP1 * yAxis );
8779 gp_XY p2( OP2 * xAxis, OP2 * yAxis );
8780 gp_XY vec12 = p2 - p1;
8781 double dist12 = vec12.Modulus();
8785 halfPlns[ nbHP ]._pos = p1;
8786 halfPlns[ nbHP ]._dir = vec12;
8787 halfPlns[ nbHP ]._inNorm.SetCoord( -vec12.Y(), vec12.X() );
8791 // intersect boundaries of half-planes, define state of intersection points
8792 // in relation to all half-planes and calculate internal point of a 2D polygon
8795 gp_XY newPos2D (0,0);
8797 enum { UNDEF = -1, NOT_OUT, IS_OUT, NO_INT };
8798 typedef std::pair< gp_XY, int > TIntPntState; // coord and isOut state
8799 TIntPntState undefIPS( gp_XY(1e100,1e100), UNDEF );
8801 vector< vector< TIntPntState > > allIntPnts( nbHP );
8802 for ( int iHP1 = 0; iHP1 < nbHP; ++iHP1 )
8804 vector< TIntPntState > & intPnts1 = allIntPnts[ iHP1 ];
8805 if ( intPnts1.empty() ) intPnts1.resize( nbHP, undefIPS );
8807 int iPrev = SMESH_MesherHelper::WrapIndex( iHP1 - 1, nbHP );
8808 int iNext = SMESH_MesherHelper::WrapIndex( iHP1 + 1, nbHP );
8811 const gp_XY* segEnds[2] = { 0, 0 }; // NOT_OUT points
8813 for ( int iHP2 = 0; iHP2 < nbHP; ++iHP2 )
8815 if ( iHP1 == iHP2 ) continue;
8817 TIntPntState & ips1 = intPnts1[ iHP2 ];
8818 if ( ips1.second == UNDEF )
8820 // find an intersection point of boundaries of iHP1 and iHP2
8822 if ( iHP2 == iPrev ) // intersection with neighbors is known
8823 ips1.first = halfPlns[ iHP1 ]._pos;
8824 else if ( iHP2 == iNext )
8825 ips1.first = halfPlns[ iHP2 ]._pos;
8826 else if ( !halfPlns[ iHP1 ].FindIntersection( halfPlns[ iHP2 ], ips1.first ))
8827 ips1.second = NO_INT;
8829 // classify the found intersection point
8830 if ( ips1.second != NO_INT )
8832 ips1.second = NOT_OUT;
8833 for ( int i = 0; i < nbHP && ips1.second == NOT_OUT; ++i )
8834 if ( i != iHP1 && i != iHP2 &&
8835 halfPlns[ i ].IsOut( ips1.first, tol ))
8836 ips1.second = IS_OUT;
8838 vector< TIntPntState > & intPnts2 = allIntPnts[ iHP2 ];
8839 if ( intPnts2.empty() ) intPnts2.resize( nbHP, undefIPS );
8840 TIntPntState & ips2 = intPnts2[ iHP1 ];
8843 if ( ips1.second == NOT_OUT )
8846 segEnds[ bool(segEnds[0]) ] = & ips1.first;
8850 // find a NOT_OUT segment of boundary which is located between
8851 // two NOT_OUT int points
8854 continue; // no such a segment
8858 // sort points along the boundary
8859 map< double, TIntPntState* > ipsByParam;
8860 for ( int iHP2 = 0; iHP2 < nbHP; ++iHP2 )
8862 TIntPntState & ips1 = intPnts1[ iHP2 ];
8863 if ( ips1.second != NO_INT )
8865 gp_XY op = ips1.first - halfPlns[ iHP1 ]._pos;
8866 double param = op * halfPlns[ iHP1 ]._dir;
8867 ipsByParam.insert( make_pair( param, & ips1 ));
8870 // look for two neighboring NOT_OUT points
8872 map< double, TIntPntState* >::iterator u2ips = ipsByParam.begin();
8873 for ( ; u2ips != ipsByParam.end(); ++u2ips )
8875 TIntPntState & ips1 = *(u2ips->second);
8876 if ( ips1.second == NOT_OUT )
8877 segEnds[ bool( nbNotOut++ ) ] = & ips1.first;
8878 else if ( nbNotOut >= 2 )
8885 if ( nbNotOut >= 2 )
8887 double len = ( *segEnds[0] - *segEnds[1] ).Modulus();
8890 newPos2D += 0.5 * len * ( *segEnds[0] + *segEnds[1] );
8897 newPos = center + xAxis * newPos2D.X() + yAxis * newPos2D.Y();
8906 #endif // OLD_NEF_POLYGON
8908 //================================================================================
8910 * \brief Add a new segment to _LayerEdge during inflation
8912 //================================================================================
8914 void _LayerEdge::SetNewLength( double len, _EdgesOnShape& eos, SMESH_MesherHelper& helper )
8919 if ( len > _maxLen )
8922 Block( eos.GetData() );
8924 const double lenDelta = len - _len;
8925 if ( lenDelta < len * 1e-3 )
8927 Block( eos.GetData() );
8931 SMDS_MeshNode* n = const_cast< SMDS_MeshNode*>( _nodes.back() );
8932 gp_XYZ oldXYZ = SMESH_TNodeXYZ( n );
8934 if ( eos._hyp.IsOffsetMethod() )
8938 SMDS_ElemIteratorPtr faceIt = _nodes[0]->GetInverseElementIterator( SMDSAbs_Face );
8939 while ( faceIt->more() )
8941 const SMDS_MeshElement* face = faceIt->next();
8942 if ( !eos.GetNormal( face, faceNorm ))
8945 // translate plane of a face
8946 gp_XYZ baryCenter = oldXYZ + faceNorm.XYZ() * lenDelta;
8948 // find point of intersection of the face plane located at baryCenter
8949 // and _normal located at newXYZ
8950 double d = -( faceNorm.XYZ() * baryCenter ); // d of plane equation ax+by+cz+d=0
8951 double dot = ( faceNorm.XYZ() * _normal );
8952 if ( dot < std::numeric_limits<double>::min() )
8953 dot = lenDelta * 1e-3;
8954 double step = -( faceNorm.XYZ() * newXYZ + d ) / dot;
8955 newXYZ += step * _normal;
8957 _lenFactor = _normal * ( newXYZ - oldXYZ ) / lenDelta; // _lenFactor is used in InvalidateStep()
8961 newXYZ = oldXYZ + _normal * lenDelta * _lenFactor;
8964 n->setXYZ( newXYZ.X(), newXYZ.Y(), newXYZ.Z() );
8965 _pos.push_back( newXYZ );
8967 if ( !eos._sWOL.IsNull() )
8971 if ( eos.SWOLType() == TopAbs_EDGE )
8973 double u = Precision::Infinite(); // to force projection w/o distance check
8974 uvOK = helper.CheckNodeU( TopoDS::Edge( eos._sWOL ), n, u,
8975 /*tol=*/2*lenDelta, /*force=*/true, distXYZ );
8976 _pos.back().SetCoord( u, 0, 0 );
8977 if ( _nodes.size() > 1 && uvOK )
8979 SMDS_EdgePosition* pos = static_cast<SMDS_EdgePosition*>( n->GetPosition() );
8980 pos->SetUParameter( u );
8985 gp_XY uv( Precision::Infinite(), 0 );
8986 uvOK = helper.CheckNodeUV( TopoDS::Face( eos._sWOL ), n, uv,
8987 /*tol=*/2*lenDelta, /*force=*/true, distXYZ );
8988 _pos.back().SetCoord( uv.X(), uv.Y(), 0 );
8989 if ( _nodes.size() > 1 && uvOK )
8991 SMDS_FacePosition* pos = static_cast<SMDS_FacePosition*>( n->GetPosition() );
8992 pos->SetUParameter( uv.X() );
8993 pos->SetVParameter( uv.Y() );
8998 n->setXYZ( distXYZ[1], distXYZ[2], distXYZ[3]);
9002 n->setXYZ( oldXYZ.X(), oldXYZ.Y(), oldXYZ.Z() );
9004 Block( eos.GetData() );
9012 if ( eos.ShapeType() != TopAbs_FACE )
9014 for ( size_t i = 0; i < _neibors.size(); ++i )
9015 //if ( _len > _neibors[i]->GetSmooLen() )
9016 _neibors[i]->Set( MOVED );
9020 dumpMove( n ); //debug
9023 //================================================================================
9025 * \brief Set BLOCKED flag and propagate limited _maxLen to _neibors
9027 //================================================================================
9029 void _LayerEdge::Block( _SolidData& data )
9031 //if ( Is( BLOCKED )) return;
9035 std::queue<_LayerEdge*> queue;
9038 gp_Pnt pSrc, pTgt, pSrcN, pTgtN;
9039 while ( !queue.empty() )
9041 _LayerEdge* edge = queue.front(); queue.pop();
9042 pSrc = SMESH_TNodeXYZ( edge->_nodes[0] );
9043 pTgt = SMESH_TNodeXYZ( edge->_nodes.back() );
9044 for ( size_t iN = 0; iN < edge->_neibors.size(); ++iN )
9046 _LayerEdge* neibor = edge->_neibors[iN];
9047 if ( neibor->_maxLen < edge->_maxLen * 1.01 )
9049 pSrcN = SMESH_TNodeXYZ( neibor->_nodes[0] );
9050 pTgtN = SMESH_TNodeXYZ( neibor->_nodes.back() );
9051 double minDist = pSrc.SquareDistance( pSrcN );
9052 minDist = Min( pTgt.SquareDistance( pTgtN ), minDist );
9053 minDist = Min( pSrc.SquareDistance( pTgtN ), minDist );
9054 minDist = Min( pTgt.SquareDistance( pSrcN ), minDist );
9055 double newMaxLen = edge->_maxLen + 0.5 * Sqrt( minDist );
9056 //if ( edge->_nodes[0]->getshapeId() == neibor->_nodes[0]->getshapeId() ) viscous_layers_00/A3
9058 newMaxLen *= edge->_lenFactor / neibor->_lenFactor;
9060 if ( neibor->_maxLen > newMaxLen )
9062 neibor->_maxLen = newMaxLen;
9063 if ( neibor->_maxLen < neibor->_len )
9065 _EdgesOnShape* eos = data.GetShapeEdges( neibor );
9066 while ( neibor->_len > neibor->_maxLen &&
9067 neibor->NbSteps() > 1 )
9068 neibor->InvalidateStep( neibor->NbSteps(), *eos, /*restoreLength=*/true );
9069 neibor->SetNewLength( neibor->_maxLen, *eos, data.GetHelper() );
9070 //neibor->Block( data );
9072 queue.push( neibor );
9078 //================================================================================
9080 * \brief Remove last inflation step
9082 //================================================================================
9084 void _LayerEdge::InvalidateStep( size_t curStep, const _EdgesOnShape& eos, bool restoreLength )
9086 if ( _pos.size() > curStep && _nodes.size() > 1 )
9088 _pos.resize( curStep );
9090 gp_Pnt nXYZ = _pos.back();
9091 SMDS_MeshNode* n = const_cast< SMDS_MeshNode*>( _nodes.back() );
9092 SMESH_TNodeXYZ curXYZ( n );
9093 if ( !eos._sWOL.IsNull() )
9095 TopLoc_Location loc;
9096 if ( eos.SWOLType() == TopAbs_EDGE )
9098 SMDS_EdgePosition* pos = static_cast<SMDS_EdgePosition*>( n->GetPosition() );
9099 pos->SetUParameter( nXYZ.X() );
9101 Handle(Geom_Curve) curve = BRep_Tool::Curve( TopoDS::Edge( eos._sWOL ), loc, f,l);
9102 nXYZ = curve->Value( nXYZ.X() ).Transformed( loc );
9106 SMDS_FacePosition* pos = static_cast<SMDS_FacePosition*>( n->GetPosition() );
9107 pos->SetUParameter( nXYZ.X() );
9108 pos->SetVParameter( nXYZ.Y() );
9109 Handle(Geom_Surface) surface = BRep_Tool::Surface( TopoDS::Face(eos._sWOL), loc );
9110 nXYZ = surface->Value( nXYZ.X(), nXYZ.Y() ).Transformed( loc );
9113 n->setXYZ( nXYZ.X(), nXYZ.Y(), nXYZ.Z() );
9116 if ( restoreLength )
9118 _len -= ( nXYZ.XYZ() - curXYZ ).Modulus() / _lenFactor;
9123 //================================================================================
9125 * \brief Return index of a _pos distant from _normal
9127 //================================================================================
9129 int _LayerEdge::GetSmoothedPos( const double tol )
9132 for ( size_t i = 1; i < _pos.size() && !iSmoothed; ++i )
9134 double normDist = ( _pos[i] - _pos[0] ).Crossed( _normal ).SquareModulus();
9135 if ( normDist > tol * tol )
9141 //================================================================================
9143 * \brief Smooth a path formed by _pos of a _LayerEdge smoothed on FACE
9145 //================================================================================
9147 void _LayerEdge::SmoothPos( const vector< double >& segLen, const double tol )
9149 if ( /*Is( NORMAL_UPDATED ) ||*/ _pos.size() <= 2 )
9152 // find the 1st smoothed _pos
9153 int iSmoothed = GetSmoothedPos( tol );
9154 if ( !iSmoothed ) return;
9156 //if ( 1 || Is( DISTORTED ))
9158 gp_XYZ normal = _normal;
9159 if ( Is( NORMAL_UPDATED ))
9160 for ( size_t i = 1; i < _pos.size(); ++i )
9162 normal = _pos[i] - _pos[0];
9163 double size = normal.Modulus();
9164 if ( size > RealSmall() )
9170 const double r = 0.2;
9171 for ( int iter = 0; iter < 50; ++iter )
9174 for ( size_t i = Max( 1, iSmoothed-1-iter ); i < _pos.size()-1; ++i )
9176 gp_XYZ midPos = 0.5 * ( _pos[i-1] + _pos[i+1] );
9177 gp_XYZ newPos = ( 1-r ) * midPos + r * _pos[i];
9179 double midLen = 0.5 * ( segLen[i-1] + segLen[i+1] );
9180 double newLen = ( 1-r ) * midLen + r * segLen[i];
9181 const_cast< double& >( segLen[i] ) = newLen;
9182 // check angle between normal and (_pos[i+1], _pos[i] )
9183 gp_XYZ posDir = _pos[i+1] - _pos[i];
9184 double size = posDir.SquareModulus();
9185 if ( size > RealSmall() )
9186 minDot = Min( minDot, ( normal * posDir ) * ( normal * posDir ) / size );
9188 if ( minDot > 0.5 * 0.5 )
9194 // for ( size_t i = 1; i < _pos.size()-1; ++i )
9196 // if ((int) i < iSmoothed && ( segLen[i] / segLen.back() < 0.5 ))
9199 // double wgt = segLen[i] / segLen.back();
9200 // gp_XYZ normPos = _pos[0] + _normal * wgt * _len;
9201 // gp_XYZ tgtPos = ( 1 - wgt ) * _pos[0] + wgt * _pos.back();
9202 // gp_XYZ newPos = ( 1 - wgt ) * normPos + wgt * tgtPos;
9203 // _pos[i] = newPos;
9208 //================================================================================
9210 * \brief Print flags
9212 //================================================================================
9214 std::string _LayerEdge::DumpFlags() const
9217 for ( int flag = 1; flag < 0x1000000; flag *= 2 )
9218 if ( _flags & flag )
9220 EFlags f = (EFlags) flag;
9222 case TO_SMOOTH: dump << "TO_SMOOTH"; break;
9223 case MOVED: dump << "MOVED"; break;
9224 case SMOOTHED: dump << "SMOOTHED"; break;
9225 case DIFFICULT: dump << "DIFFICULT"; break;
9226 case ON_CONCAVE_FACE: dump << "ON_CONCAVE_FACE"; break;
9227 case BLOCKED: dump << "BLOCKED"; break;
9228 case INTERSECTED: dump << "INTERSECTED"; break;
9229 case NORMAL_UPDATED: dump << "NORMAL_UPDATED"; break;
9230 case MARKED: dump << "MARKED"; break;
9231 case MULTI_NORMAL: dump << "MULTI_NORMAL"; break;
9232 case NEAR_BOUNDARY: dump << "NEAR_BOUNDARY"; break;
9233 case SMOOTHED_C1: dump << "SMOOTHED_C1"; break;
9234 case DISTORTED: dump << "DISTORTED"; break;
9235 case RISKY_SWOL: dump << "RISKY_SWOL"; break;
9236 case SHRUNK: dump << "SHRUNK"; break;
9237 case UNUSED_FLAG: dump << "UNUSED_FLAG"; break;
9241 cout << dump << endl;
9245 //================================================================================
9250 //================================================================================
9252 bool _ViscousBuilder::refine(_SolidData& data)
9254 SMESH_MesherHelper& helper = data.GetHelper();
9255 helper.SetElementsOnShape(false);
9257 Handle(Geom_Curve) curve;
9258 Handle(ShapeAnalysis_Surface) surface;
9259 TopoDS_Edge geomEdge;
9260 TopoDS_Face geomFace;
9261 TopLoc_Location loc;
9264 vector< gp_XYZ > pos3D;
9266 TGeomID prevBaseId = -1;
9267 TNode2Edge* n2eMap = 0;
9268 TNode2Edge::iterator n2e;
9270 // Create intermediate nodes on each _LayerEdge
9272 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
9274 _EdgesOnShape& eos = data._edgesOnShape[iS];
9275 if ( eos._edges.empty() ) continue;
9277 if ( eos._edges[0]->_nodes.size() < 2 )
9278 continue; // on _noShrinkShapes
9280 // get data of a shrink shape
9282 geomEdge.Nullify(); geomFace.Nullify();
9283 curve.Nullify(); surface.Nullify();
9284 if ( !eos._sWOL.IsNull() )
9286 isOnEdge = ( eos.SWOLType() == TopAbs_EDGE );
9289 geomEdge = TopoDS::Edge( eos._sWOL );
9290 curve = BRep_Tool::Curve( geomEdge, loc, f,l);
9294 geomFace = TopoDS::Face( eos._sWOL );
9295 surface = helper.GetSurface( geomFace );
9298 else if ( eos.ShapeType() == TopAbs_FACE && eos._toSmooth )
9300 geomFace = TopoDS::Face( eos._shape );
9301 surface = helper.GetSurface( geomFace );
9302 // propagate _toSmooth back to _eosC1, which was unset in findShapesToSmooth()
9303 for ( size_t i = 0; i < eos._eosC1.size(); ++i )
9305 eos._eosC1[ i ]->_toSmooth = true;
9306 for ( size_t j = 0; j < eos._eosC1[i]->_edges.size(); ++j )
9307 eos._eosC1[i]->_edges[j]->Set( _LayerEdge::SMOOTHED_C1 );
9311 vector< double > segLen;
9312 for ( size_t i = 0; i < eos._edges.size(); ++i )
9314 _LayerEdge& edge = *eos._edges[i];
9315 if ( edge._pos.size() < 2 )
9318 // get accumulated length of segments
9319 segLen.resize( edge._pos.size() );
9321 if ( eos._sWOL.IsNull() )
9323 bool useNormal = true;
9324 bool usePos = false;
9325 bool smoothed = false;
9326 double preci = 0.1 * edge._len;
9327 if ( eos._toSmooth && edge._pos.size() > 2 )
9329 smoothed = edge.GetSmoothedPos( preci );
9333 if ( !surface.IsNull() &&
9334 !data._convexFaces.count( eos._shapeID )) // edge smoothed on FACE
9336 useNormal = usePos = false;
9337 gp_Pnt2d uv = helper.GetNodeUV( geomFace, edge._nodes[0] );
9338 for ( size_t j = 1; j < edge._pos.size() && !useNormal; ++j )
9340 uv = surface->NextValueOfUV( uv, edge._pos[j], preci );
9341 if ( surface->Gap() < 2. * edge._len )
9342 segLen[j] = surface->Gap();
9348 else if ( !edge.Is( _LayerEdge::NORMAL_UPDATED ))
9350 #ifndef __NODES_AT_POS
9351 useNormal = usePos = false;
9352 edge._pos[1] = edge._pos.back();
9353 edge._pos.resize( 2 );
9355 segLen[ 1 ] = edge._len;
9358 if ( useNormal && edge.Is( _LayerEdge::NORMAL_UPDATED ))
9360 useNormal = usePos = false;
9361 _LayerEdge tmpEdge; // get original _normal
9362 tmpEdge._nodes.push_back( edge._nodes[0] );
9363 if ( !setEdgeData( tmpEdge, eos, helper, data ))
9366 for ( size_t j = 1; j < edge._pos.size(); ++j )
9367 segLen[j] = ( edge._pos[j] - edge._pos[0] ) * tmpEdge._normal;
9371 for ( size_t j = 1; j < edge._pos.size(); ++j )
9372 segLen[j] = ( edge._pos[j] - edge._pos[0] ) * edge._normal;
9376 for ( size_t j = 1; j < edge._pos.size(); ++j )
9377 segLen[j] = segLen[j-1] + ( edge._pos[j-1] - edge._pos[j] ).Modulus();
9381 bool swapped = ( edge._pos.size() > 2 );
9385 for ( size_t j = 1; j < edge._pos.size()-1; ++j )
9386 if ( segLen[j] > segLen.back() )
9388 segLen.erase( segLen.begin() + j );
9389 edge._pos.erase( edge._pos.begin() + j );
9392 else if ( segLen[j] < segLen[j-1] )
9394 std::swap( segLen[j], segLen[j-1] );
9395 std::swap( edge._pos[j], edge._pos[j-1] );
9400 // smooth a path formed by edge._pos
9401 #ifndef __NODES_AT_POS
9402 if (( smoothed ) /*&&
9403 ( eos.ShapeType() == TopAbs_FACE || edge.Is( _LayerEdge::SMOOTHED_C1 ))*/)
9404 edge.SmoothPos( segLen, preci );
9407 else if ( eos._isRegularSWOL ) // usual SWOL
9409 for ( size_t j = 1; j < edge._pos.size(); ++j )
9410 segLen[j] = segLen[j-1] + (edge._pos[j-1] - edge._pos[j] ).Modulus();
9412 else if ( !surface.IsNull() ) // SWOL surface with singularities
9414 pos3D.resize( edge._pos.size() );
9415 for ( size_t j = 0; j < edge._pos.size(); ++j )
9416 pos3D[j] = surface->Value( edge._pos[j].X(), edge._pos[j].Y() ).XYZ();
9418 for ( size_t j = 1; j < edge._pos.size(); ++j )
9419 segLen[j] = segLen[j-1] + ( pos3D[j-1] - pos3D[j] ).Modulus();
9422 // allocate memory for new nodes if it is not yet refined
9423 const SMDS_MeshNode* tgtNode = edge._nodes.back();
9424 if ( edge._nodes.size() == 2 )
9426 #ifdef __NODES_AT_POS
9427 int nbNodes = edge._pos.size();
9429 int nbNodes = eos._hyp.GetNumberLayers() + 1;
9431 edge._nodes.resize( nbNodes, 0 );
9433 edge._nodes.back() = tgtNode;
9435 // restore shapePos of the last node by already treated _LayerEdge of another _SolidData
9436 const TGeomID baseShapeId = edge._nodes[0]->getshapeId();
9437 if ( baseShapeId != prevBaseId )
9439 map< TGeomID, TNode2Edge* >::iterator s2ne = data._s2neMap.find( baseShapeId );
9440 n2eMap = ( s2ne == data._s2neMap.end() ) ? 0 : s2ne->second;
9441 prevBaseId = baseShapeId;
9443 _LayerEdge* edgeOnSameNode = 0;
9444 bool useExistingPos = false;
9445 if ( n2eMap && (( n2e = n2eMap->find( edge._nodes[0] )) != n2eMap->end() ))
9447 edgeOnSameNode = n2e->second;
9448 useExistingPos = ( edgeOnSameNode->_len < edge._len );
9449 const gp_XYZ& otherTgtPos = edgeOnSameNode->_pos.back();
9450 SMDS_PositionPtr lastPos = tgtNode->GetPosition();
9453 SMDS_EdgePosition* epos = static_cast<SMDS_EdgePosition*>( lastPos );
9454 epos->SetUParameter( otherTgtPos.X() );
9458 SMDS_FacePosition* fpos = static_cast<SMDS_FacePosition*>( lastPos );
9459 fpos->SetUParameter( otherTgtPos.X() );
9460 fpos->SetVParameter( otherTgtPos.Y() );
9463 // calculate height of the first layer
9465 const double T = segLen.back(); //data._hyp.GetTotalThickness();
9466 const double f = eos._hyp.GetStretchFactor();
9467 const int N = eos._hyp.GetNumberLayers();
9468 const double fPowN = pow( f, N );
9469 if ( fPowN - 1 <= numeric_limits<double>::min() )
9472 h0 = T * ( f - 1 )/( fPowN - 1 );
9474 const double zeroLen = std::numeric_limits<double>::min();
9476 // create intermediate nodes
9477 double hSum = 0, hi = h0/f;
9479 for ( size_t iStep = 1; iStep < edge._nodes.size(); ++iStep )
9481 // compute an intermediate position
9484 while ( hSum > segLen[iSeg] && iSeg < segLen.size()-1 )
9486 int iPrevSeg = iSeg-1;
9487 while ( fabs( segLen[iPrevSeg] - segLen[iSeg]) <= zeroLen && iPrevSeg > 0 )
9489 double r = ( segLen[iSeg] - hSum ) / ( segLen[iSeg] - segLen[iPrevSeg] );
9490 gp_Pnt pos = r * edge._pos[iPrevSeg] + (1-r) * edge._pos[iSeg];
9491 #ifdef __NODES_AT_POS
9492 pos = edge._pos[ iStep ];
9494 SMDS_MeshNode*& node = const_cast< SMDS_MeshNode*& >( edge._nodes[ iStep ]);
9495 if ( !eos._sWOL.IsNull() )
9497 // compute XYZ by parameters <pos>
9502 pos = curve->Value( u ).Transformed(loc);
9504 else if ( eos._isRegularSWOL )
9506 uv.SetCoord( pos.X(), pos.Y() );
9508 pos = surface->Value( pos.X(), pos.Y() );
9512 uv.SetCoord( pos.X(), pos.Y() );
9513 gp_Pnt p = r * pos3D[ iPrevSeg ] + (1-r) * pos3D[ iSeg ];
9514 uv = surface->NextValueOfUV( uv, p, BRep_Tool::Tolerance( geomFace )).XY();
9516 pos = surface->Value( uv );
9519 // create or update the node
9522 node = helper.AddNode( pos.X(), pos.Y(), pos.Z());
9523 if ( !eos._sWOL.IsNull() )
9526 getMeshDS()->SetNodeOnEdge( node, geomEdge, u );
9528 getMeshDS()->SetNodeOnFace( node, geomFace, uv.X(), uv.Y() );
9532 getMeshDS()->SetNodeInVolume( node, helper.GetSubShapeID() );
9537 if ( !eos._sWOL.IsNull() )
9539 // make average pos from new and current parameters
9542 //u = 0.5 * ( u + helper.GetNodeU( geomEdge, node ));
9543 if ( useExistingPos )
9544 u = helper.GetNodeU( geomEdge, node );
9545 pos = curve->Value( u ).Transformed(loc);
9547 SMDS_EdgePosition* epos = static_cast<SMDS_EdgePosition*>( node->GetPosition() );
9548 epos->SetUParameter( u );
9552 //uv = 0.5 * ( uv + helper.GetNodeUV( geomFace, node ));
9553 if ( useExistingPos )
9554 uv = helper.GetNodeUV( geomFace, node );
9555 pos = surface->Value( uv );
9557 SMDS_FacePosition* fpos = static_cast<SMDS_FacePosition*>( node->GetPosition() );
9558 fpos->SetUParameter( uv.X() );
9559 fpos->SetVParameter( uv.Y() );
9562 node->setXYZ( pos.X(), pos.Y(), pos.Z() );
9564 } // loop on edge._nodes
9566 if ( !eos._sWOL.IsNull() ) // prepare for shrink()
9569 edge._pos.back().SetCoord( u, 0,0);
9571 edge._pos.back().SetCoord( uv.X(), uv.Y() ,0);
9573 if ( edgeOnSameNode )
9574 edgeOnSameNode->_pos.back() = edge._pos.back();
9577 } // loop on eos._edges to create nodes
9580 if ( !getMeshDS()->IsEmbeddedMode() )
9581 // Log node movement
9582 for ( size_t i = 0; i < eos._edges.size(); ++i )
9584 SMESH_TNodeXYZ p ( eos._edges[i]->_nodes.back() );
9585 getMeshDS()->MoveNode( p._node, p.X(), p.Y(), p.Z() );
9592 helper.SetElementsOnShape(true);
9594 vector< vector<const SMDS_MeshNode*>* > nnVec;
9595 set< vector<const SMDS_MeshNode*>* > nnSet;
9596 set< int > degenEdgeInd;
9597 vector<const SMDS_MeshElement*> degenVols;
9599 TopExp_Explorer exp( data._solid, TopAbs_FACE );
9600 for ( ; exp.More(); exp.Next() )
9602 const TGeomID faceID = getMeshDS()->ShapeToIndex( exp.Current() );
9603 if ( data._ignoreFaceIds.count( faceID ))
9605 const bool isReversedFace = data._reversedFaceIds.count( faceID );
9606 SMESHDS_SubMesh* fSubM = getMeshDS()->MeshElements( exp.Current() );
9607 SMDS_ElemIteratorPtr fIt = fSubM->GetElements();
9608 while ( fIt->more() )
9610 const SMDS_MeshElement* face = fIt->next();
9611 const int nbNodes = face->NbCornerNodes();
9612 nnVec.resize( nbNodes );
9614 degenEdgeInd.clear();
9615 size_t maxZ = 0, minZ = std::numeric_limits<size_t>::max();
9616 SMDS_NodeIteratorPtr nIt = face->nodeIterator();
9617 for ( int iN = 0; iN < nbNodes; ++iN )
9619 const SMDS_MeshNode* n = nIt->next();
9620 _LayerEdge* edge = data._n2eMap[ n ];
9621 const int i = isReversedFace ? nbNodes-1-iN : iN;
9622 nnVec[ i ] = & edge->_nodes;
9623 maxZ = std::max( maxZ, nnVec[ i ]->size() );
9624 minZ = std::min( minZ, nnVec[ i ]->size() );
9626 if ( helper.HasDegeneratedEdges() )
9627 nnSet.insert( nnVec[ i ]);
9632 if ( 0 < nnSet.size() && nnSet.size() < 3 )
9640 for ( size_t iZ = 1; iZ < minZ; ++iZ )
9641 helper.AddVolume( (*nnVec[0])[iZ-1], (*nnVec[1])[iZ-1], (*nnVec[2])[iZ-1],
9642 (*nnVec[0])[iZ], (*nnVec[1])[iZ], (*nnVec[2])[iZ]);
9644 for ( size_t iZ = minZ; iZ < maxZ; ++iZ )
9646 for ( int iN = 0; iN < nbNodes; ++iN )
9647 if ( nnVec[ iN ]->size() < iZ+1 )
9648 degenEdgeInd.insert( iN );
9650 if ( degenEdgeInd.size() == 1 ) // PYRAM
9652 int i2 = *degenEdgeInd.begin();
9653 int i0 = helper.WrapIndex( i2 - 1, nbNodes );
9654 int i1 = helper.WrapIndex( i2 + 1, nbNodes );
9655 helper.AddVolume( (*nnVec[i0])[iZ-1], (*nnVec[i1])[iZ-1],
9656 (*nnVec[i1])[iZ ], (*nnVec[i0])[iZ ], (*nnVec[i2]).back());
9660 int i3 = !degenEdgeInd.count(0) ? 0 : !degenEdgeInd.count(1) ? 1 : 2;
9661 helper.AddVolume( (*nnVec[ 0 ])[ i3 == 0 ? iZ-1 : nnVec[0]->size()-1 ],
9662 (*nnVec[ 1 ])[ i3 == 1 ? iZ-1 : nnVec[1]->size()-1 ],
9663 (*nnVec[ 2 ])[ i3 == 2 ? iZ-1 : nnVec[2]->size()-1 ],
9664 (*nnVec[ i3 ])[ iZ ]);
9672 for ( size_t iZ = 1; iZ < minZ; ++iZ )
9673 helper.AddVolume( (*nnVec[0])[iZ-1], (*nnVec[1])[iZ-1],
9674 (*nnVec[2])[iZ-1], (*nnVec[3])[iZ-1],
9675 (*nnVec[0])[iZ], (*nnVec[1])[iZ],
9676 (*nnVec[2])[iZ], (*nnVec[3])[iZ]);
9678 for ( size_t iZ = minZ; iZ < maxZ; ++iZ )
9680 for ( int iN = 0; iN < nbNodes; ++iN )
9681 if ( nnVec[ iN ]->size() < iZ+1 )
9682 degenEdgeInd.insert( iN );
9684 switch ( degenEdgeInd.size() )
9688 int i2 = *degenEdgeInd.begin();
9689 int i3 = *degenEdgeInd.rbegin();
9690 bool ok = ( i3 - i2 == 1 );
9691 if ( i2 == 0 && i3 == 3 ) { i2 = 3; i3 = 0; ok = true; }
9692 int i0 = helper.WrapIndex( i3 + 1, nbNodes );
9693 int i1 = helper.WrapIndex( i0 + 1, nbNodes );
9695 const SMDS_MeshElement* vol =
9696 helper.AddVolume( nnVec[i3]->back(), (*nnVec[i0])[iZ], (*nnVec[i0])[iZ-1],
9697 nnVec[i2]->back(), (*nnVec[i1])[iZ], (*nnVec[i1])[iZ-1]);
9699 degenVols.push_back( vol );
9703 default: // degen HEX
9705 const SMDS_MeshElement* vol =
9706 helper.AddVolume( nnVec[0]->size() > iZ-1 ? (*nnVec[0])[iZ-1] : nnVec[0]->back(),
9707 nnVec[1]->size() > iZ-1 ? (*nnVec[1])[iZ-1] : nnVec[1]->back(),
9708 nnVec[2]->size() > iZ-1 ? (*nnVec[2])[iZ-1] : nnVec[2]->back(),
9709 nnVec[3]->size() > iZ-1 ? (*nnVec[3])[iZ-1] : nnVec[3]->back(),
9710 nnVec[0]->size() > iZ ? (*nnVec[0])[iZ] : nnVec[0]->back(),
9711 nnVec[1]->size() > iZ ? (*nnVec[1])[iZ] : nnVec[1]->back(),
9712 nnVec[2]->size() > iZ ? (*nnVec[2])[iZ] : nnVec[2]->back(),
9713 nnVec[3]->size() > iZ ? (*nnVec[3])[iZ] : nnVec[3]->back());
9714 degenVols.push_back( vol );
9721 return error("Not supported type of element", data._index);
9723 } // switch ( nbNodes )
9724 } // while ( fIt->more() )
9727 if ( !degenVols.empty() )
9729 SMESH_ComputeErrorPtr& err = _mesh->GetSubMesh( data._solid )->GetComputeError();
9730 if ( !err || err->IsOK() )
9732 err.reset( new SMESH_ComputeError( COMPERR_WARNING,
9733 "Bad quality volumes created" ));
9734 err->myBadElements.insert( err->myBadElements.end(),
9735 degenVols.begin(),degenVols.end() );
9742 //================================================================================
9744 * \brief Shrink 2D mesh on faces to let space for inflated layers
9746 //================================================================================
9748 bool _ViscousBuilder::shrink(_SolidData& theData)
9750 // make map of (ids of FACEs to shrink mesh on) to (list of _SolidData containing
9751 // _LayerEdge's inflated along FACE or EDGE)
9752 map< TGeomID, list< _SolidData* > > f2sdMap;
9753 for ( size_t i = 0 ; i < _sdVec.size(); ++i )
9755 _SolidData& data = _sdVec[i];
9756 map< TGeomID, TopoDS_Shape >::iterator s2s = data._shrinkShape2Shape.begin();
9757 for (; s2s != data._shrinkShape2Shape.end(); ++s2s )
9758 if ( s2s->second.ShapeType() == TopAbs_FACE && !_shrinkedFaces.Contains( s2s->second ))
9760 f2sdMap[ getMeshDS()->ShapeToIndex( s2s->second )].push_back( &data );
9762 // Put mesh faces on the shrinked FACE to the proxy sub-mesh to avoid
9763 // usage of mesh faces made in addBoundaryElements() by the 3D algo or
9764 // by StdMeshers_QuadToTriaAdaptor
9765 if ( SMESHDS_SubMesh* smDS = getMeshDS()->MeshElements( s2s->second ))
9767 SMESH_ProxyMesh::SubMesh* proxySub =
9768 data._proxyMesh->getFaceSubM( TopoDS::Face( s2s->second ), /*create=*/true);
9769 if ( proxySub->NbElements() == 0 )
9771 SMDS_ElemIteratorPtr fIt = smDS->GetElements();
9772 while ( fIt->more() )
9774 const SMDS_MeshElement* f = fIt->next();
9775 // as a result 3D algo will use elements from proxySub and not from smDS
9776 proxySub->AddElement( f );
9777 f->setIsMarked( true );
9779 // Mark nodes on the FACE to discriminate them from nodes
9780 // added by addBoundaryElements(); marked nodes are to be smoothed while shrink()
9781 for ( int iN = 0, nbN = f->NbNodes(); iN < nbN; ++iN )
9783 const SMDS_MeshNode* n = f->GetNode( iN );
9784 if ( n->GetPosition()->GetDim() == 2 )
9785 n->setIsMarked( true );
9793 SMESH_MesherHelper helper( *_mesh );
9794 helper.ToFixNodeParameters( true );
9797 map< TGeomID, _Shrinker1D > e2shrMap;
9798 vector< _EdgesOnShape* > subEOS;
9799 vector< _LayerEdge* > lEdges;
9801 // loop on FACEs to srink mesh on
9802 map< TGeomID, list< _SolidData* > >::iterator f2sd = f2sdMap.begin();
9803 for ( ; f2sd != f2sdMap.end(); ++f2sd )
9805 list< _SolidData* > & dataList = f2sd->second;
9806 if ( dataList.front()->_n2eMap.empty() ||
9807 dataList.back() ->_n2eMap.empty() )
9808 continue; // not yet computed
9809 if ( dataList.front() != &theData &&
9810 dataList.back() != &theData )
9813 _SolidData& data = *dataList.front();
9814 _SolidData* data2 = dataList.size() > 1 ? dataList.back() : 0;
9815 const TopoDS_Face& F = TopoDS::Face( getMeshDS()->IndexToShape( f2sd->first ));
9816 SMESH_subMesh* sm = _mesh->GetSubMesh( F );
9817 SMESHDS_SubMesh* smDS = sm->GetSubMeshDS();
9819 Handle(Geom_Surface) surface = BRep_Tool::Surface( F );
9821 _shrinkedFaces.Add( F );
9822 helper.SetSubShape( F );
9824 // ===========================
9825 // Prepare data for shrinking
9826 // ===========================
9828 // Collect nodes to smooth (they are marked at the beginning of this method)
9829 vector < const SMDS_MeshNode* > smoothNodes;
9831 SMDS_NodeIteratorPtr nIt = smDS->GetNodes();
9832 while ( nIt->more() )
9834 const SMDS_MeshNode* n = nIt->next();
9835 if ( n->isMarked() )
9836 smoothNodes.push_back( n );
9839 // Find out face orientation
9841 const set<TGeomID> ignoreShapes;
9843 if ( !smoothNodes.empty() )
9845 vector<_Simplex> simplices;
9846 _Simplex::GetSimplices( smoothNodes[0], simplices, ignoreShapes );
9847 helper.GetNodeUV( F, simplices[0]._nPrev, 0, &isOkUV ); // fix UV of simplex nodes
9848 helper.GetNodeUV( F, simplices[0]._nNext, 0, &isOkUV );
9849 gp_XY uv = helper.GetNodeUV( F, smoothNodes[0], 0, &isOkUV );
9850 if ( !simplices[0].IsForward(uv, smoothNodes[0], F, helper, refSign ))
9854 // Find _LayerEdge's inflated along F
9858 SMESH_subMeshIteratorPtr subIt = sm->getDependsOnIterator(/*includeSelf=*/false,
9859 /*complexFirst=*/true); //!!!
9860 while ( subIt->more() )
9862 const TGeomID subID = subIt->next()->GetId();
9863 if ( data._noShrinkShapes.count( subID ))
9865 _EdgesOnShape* eos = data.GetShapeEdges( subID );
9866 if ( !eos || eos->_sWOL.IsNull() )
9867 if ( data2 ) // check in adjacent SOLID
9869 eos = data2->GetShapeEdges( subID );
9870 if ( !eos || eos->_sWOL.IsNull() )
9873 subEOS.push_back( eos );
9875 for ( size_t i = 0; i < eos->_edges.size(); ++i )
9877 lEdges.push_back( eos->_edges[ i ] );
9878 prepareEdgeToShrink( *eos->_edges[ i ], *eos, helper, smDS );
9883 dumpFunction(SMESH_Comment("beforeShrinkFace")<<f2sd->first); // debug
9884 SMDS_ElemIteratorPtr fIt = smDS->GetElements();
9885 while ( fIt->more() )
9886 if ( const SMDS_MeshElement* f = fIt->next() )
9887 dumpChangeNodes( f );
9890 // Replace source nodes by target nodes in mesh faces to shrink
9891 dumpFunction(SMESH_Comment("replNodesOnFace")<<f2sd->first); // debug
9892 const SMDS_MeshNode* nodes[20];
9893 for ( size_t iS = 0; iS < subEOS.size(); ++iS )
9895 _EdgesOnShape& eos = * subEOS[ iS ];
9896 for ( size_t i = 0; i < eos._edges.size(); ++i )
9898 _LayerEdge& edge = *eos._edges[i];
9899 const SMDS_MeshNode* srcNode = edge._nodes[0];
9900 const SMDS_MeshNode* tgtNode = edge._nodes.back();
9901 SMDS_ElemIteratorPtr fIt = srcNode->GetInverseElementIterator(SMDSAbs_Face);
9902 while ( fIt->more() )
9904 const SMDS_MeshElement* f = fIt->next();
9905 if ( !smDS->Contains( f ) || !f->isMarked() )
9907 SMDS_NodeIteratorPtr nIt = f->nodeIterator();
9908 for ( int iN = 0; nIt->more(); ++iN )
9910 const SMDS_MeshNode* n = nIt->next();
9911 nodes[iN] = ( n == srcNode ? tgtNode : n );
9913 helper.GetMeshDS()->ChangeElementNodes( f, nodes, f->NbNodes() );
9914 dumpChangeNodes( f );
9920 // find out if a FACE is concave
9921 const bool isConcaveFace = isConcave( F, helper );
9923 // Create _SmoothNode's on face F
9924 vector< _SmoothNode > nodesToSmooth( smoothNodes.size() );
9926 dumpFunction(SMESH_Comment("fixUVOnFace")<<f2sd->first); // debug
9927 const bool sortSimplices = isConcaveFace;
9928 for ( size_t i = 0; i < smoothNodes.size(); ++i )
9930 const SMDS_MeshNode* n = smoothNodes[i];
9931 nodesToSmooth[ i ]._node = n;
9932 // src nodes must be already replaced by tgt nodes to have tgt nodes in _simplices
9933 _Simplex::GetSimplices( n, nodesToSmooth[ i ]._simplices, ignoreShapes, 0, sortSimplices);
9934 // fix up incorrect uv of nodes on the FACE
9935 helper.GetNodeUV( F, n, 0, &isOkUV);
9940 //if ( nodesToSmooth.empty() ) continue;
9942 // Find EDGE's to shrink and set simpices to LayerEdge's
9943 set< _Shrinker1D* > eShri1D;
9945 for ( size_t iS = 0; iS < subEOS.size(); ++iS )
9947 _EdgesOnShape& eos = * subEOS[ iS ];
9948 if ( eos.SWOLType() == TopAbs_EDGE )
9950 SMESH_subMesh* edgeSM = _mesh->GetSubMesh( eos._sWOL );
9951 _Shrinker1D& srinker = e2shrMap[ edgeSM->GetId() ];
9952 eShri1D.insert( & srinker );
9953 srinker.AddEdge( eos._edges[0], eos, helper );
9954 VISCOUS_3D::ToClearSubWithMain( edgeSM, data._solid );
9955 // restore params of nodes on EGDE if the EDGE has been already
9956 // srinked while srinking other FACE
9957 srinker.RestoreParams();
9959 for ( size_t i = 0; i < eos._edges.size(); ++i )
9961 _LayerEdge& edge = * eos._edges[i];
9962 _Simplex::GetSimplices( /*tgtNode=*/edge._nodes.back(), edge._simplices, ignoreShapes );
9964 // additionally mark tgt node; only marked nodes will be used in SetNewLength2d()
9965 // not-marked nodes are those added by refine()
9966 edge._nodes.back()->setIsMarked( true );
9971 bool toFixTria = false; // to improve quality of trias by diagonal swap
9972 if ( isConcaveFace )
9974 const bool hasTria = _mesh->NbTriangles(), hasQuad = _mesh->NbQuadrangles();
9975 if ( hasTria != hasQuad ) {
9976 toFixTria = hasTria;
9979 set<int> nbNodesSet;
9980 SMDS_ElemIteratorPtr fIt = smDS->GetElements();
9981 while ( fIt->more() && nbNodesSet.size() < 2 )
9982 nbNodesSet.insert( fIt->next()->NbCornerNodes() );
9983 toFixTria = ( *nbNodesSet.begin() == 3 );
9987 // ==================
9988 // Perform shrinking
9989 // ==================
9991 bool shrinked = true;
9992 int nbBad, shriStep=0, smooStep=0;
9993 _SmoothNode::SmoothType smoothType
9994 = isConcaveFace ? _SmoothNode::ANGULAR : _SmoothNode::LAPLACIAN;
9995 SMESH_Comment errMsg;
9999 // Move boundary nodes (actually just set new UV)
10000 // -----------------------------------------------
10001 dumpFunction(SMESH_Comment("moveBoundaryOnF")<<f2sd->first<<"_st"<<shriStep ); // debug
10003 for ( size_t iS = 0; iS < subEOS.size(); ++iS )
10005 _EdgesOnShape& eos = * subEOS[ iS ];
10006 for ( size_t i = 0; i < eos._edges.size(); ++i )
10008 shrinked |= eos._edges[i]->SetNewLength2d( surface, F, eos, helper );
10013 // Move nodes on EDGE's
10014 // (XYZ is set as soon as a needed length reached in SetNewLength2d())
10015 set< _Shrinker1D* >::iterator shr = eShri1D.begin();
10016 for ( ; shr != eShri1D.end(); ++shr )
10017 (*shr)->Compute( /*set3D=*/false, helper );
10020 // -----------------
10021 int nbNoImpSteps = 0;
10024 while (( nbNoImpSteps < 5 && nbBad > 0) && moved)
10026 dumpFunction(SMESH_Comment("shrinkFace")<<f2sd->first<<"_st"<<++smooStep); // debug
10028 int oldBadNb = nbBad;
10031 // '% 5' minimizes NB FUNCTIONS on viscous_layers_00/B2 case
10032 _SmoothNode::SmoothType smooTy = ( smooStep % 5 ) ? smoothType : _SmoothNode::LAPLACIAN;
10033 for ( size_t i = 0; i < nodesToSmooth.size(); ++i )
10035 moved |= nodesToSmooth[i].Smooth( nbBad, surface, helper, refSign,
10036 smooTy, /*set3D=*/isConcaveFace);
10038 if ( nbBad < oldBadNb )
10048 errMsg << "Can't shrink 2D mesh on face " << f2sd->first;
10049 if ( shriStep > 200 )
10050 errMsg << "Infinite loop at shrinking 2D mesh on face " << f2sd->first;
10051 if ( !errMsg.empty() )
10054 // Fix narrow triangles by swapping diagonals
10055 // ---------------------------------------
10058 set<const SMDS_MeshNode*> usedNodes;
10059 fixBadFaces( F, helper, /*is2D=*/true, shriStep, & usedNodes); // swap diagonals
10061 // update working data
10062 set<const SMDS_MeshNode*>::iterator n;
10063 for ( size_t i = 0; i < nodesToSmooth.size() && !usedNodes.empty(); ++i )
10065 n = usedNodes.find( nodesToSmooth[ i ]._node );
10066 if ( n != usedNodes.end())
10068 _Simplex::GetSimplices( nodesToSmooth[ i ]._node,
10069 nodesToSmooth[ i ]._simplices,
10070 ignoreShapes, NULL,
10071 /*sortSimplices=*/ smoothType == _SmoothNode::ANGULAR );
10072 usedNodes.erase( n );
10075 for ( size_t i = 0; i < lEdges.size() && !usedNodes.empty(); ++i )
10077 n = usedNodes.find( /*tgtNode=*/ lEdges[i]->_nodes.back() );
10078 if ( n != usedNodes.end())
10080 _Simplex::GetSimplices( lEdges[i]->_nodes.back(),
10081 lEdges[i]->_simplices,
10083 usedNodes.erase( n );
10087 // TODO: check effect of this additional smooth
10088 // additional laplacian smooth to increase allowed shrink step
10089 // for ( int st = 1; st; --st )
10091 // dumpFunction(SMESH_Comment("shrinkFace")<<f2sd->first<<"_st"<<++smooStep); // debug
10092 // for ( size_t i = 0; i < nodesToSmooth.size(); ++i )
10094 // nodesToSmooth[i].Smooth( nbBad,surface,helper,refSign,
10095 // _SmoothNode::LAPLACIAN,/*set3D=*/false);
10099 } // while ( shrinked )
10101 if ( !errMsg.empty() ) // Try to re-compute the shrink FACE
10103 debugMsg( "Re-compute FACE " << f2sd->first << " because " << errMsg );
10106 SMESHDS_SubMesh* psm = data._proxyMesh->getFaceSubM( F );
10108 vector< const SMDS_MeshElement* > facesToRm;
10111 facesToRm.reserve( psm->NbElements() );
10112 for ( SMDS_ElemIteratorPtr ite = psm->GetElements(); ite->more(); )
10113 facesToRm.push_back( ite->next() );
10115 for ( size_t i = 0 ; i < _sdVec.size(); ++i )
10116 if (( psm = _sdVec[i]._proxyMesh->getFaceSubM( F )))
10119 for ( size_t i = 0; i < facesToRm.size(); ++i )
10120 getMeshDS()->RemoveFreeElement( facesToRm[i], smDS, /*fromGroups=*/false );
10124 TIDSortedNodeSet nodesToKeep; // nodes of _LayerEdge to keep
10125 for ( size_t iS = 0; iS < subEOS.size(); ++iS ) {
10126 for ( size_t i = 0; i < subEOS[iS]->_edges.size(); ++i )
10127 nodesToKeep.insert( ++( subEOS[iS]->_edges[i]->_nodes.begin() ),
10128 subEOS[iS]->_edges[i]->_nodes.end() );
10130 SMDS_NodeIteratorPtr itn = smDS->GetNodes();
10131 while ( itn->more() ) {
10132 const SMDS_MeshNode* n = itn->next();
10133 if ( !nodesToKeep.count( n ))
10134 getMeshDS()->RemoveFreeNode( n, smDS, /*fromGroups=*/false );
10137 // restore position and UV of target nodes
10139 for ( size_t iS = 0; iS < subEOS.size(); ++iS )
10140 for ( size_t i = 0; i < subEOS[iS]->_edges.size(); ++i )
10142 _LayerEdge* edge = subEOS[iS]->_edges[i];
10143 SMDS_MeshNode* tgtNode = const_cast< SMDS_MeshNode*& >( edge->_nodes.back() );
10144 if ( edge->_pos.empty() ||
10145 edge->Is( _LayerEdge::SHRUNK )) continue;
10146 if ( subEOS[iS]->SWOLType() == TopAbs_FACE )
10148 SMDS_FacePosition* pos = static_cast<SMDS_FacePosition*>( tgtNode->GetPosition() );
10149 pos->SetUParameter( edge->_pos[0].X() );
10150 pos->SetVParameter( edge->_pos[0].Y() );
10151 p = surface->Value( edge->_pos[0].X(), edge->_pos[0].Y() );
10155 SMDS_EdgePosition* pos = static_cast<SMDS_EdgePosition*>( tgtNode->GetPosition() );
10156 pos->SetUParameter( edge->_pos[0].Coord( U_TGT ));
10157 p = BRepAdaptor_Curve( TopoDS::Edge( subEOS[iS]->_sWOL )).Value( pos->GetUParameter() );
10159 tgtNode->setXYZ( p.X(), p.Y(), p.Z() );
10160 dumpMove( tgtNode );
10162 // shrink EDGE sub-meshes and set proxy sub-meshes
10163 UVPtStructVec uvPtVec;
10164 set< _Shrinker1D* >::iterator shrIt = eShri1D.begin();
10165 for ( shrIt = eShri1D.begin(); shrIt != eShri1D.end(); ++shrIt )
10167 _Shrinker1D* shr = (*shrIt);
10168 shr->Compute( /*set3D=*/true, helper );
10170 // set proxy mesh of EDGEs w/o layers
10171 map< double, const SMDS_MeshNode* > nodes;
10172 SMESH_Algo::GetSortedNodesOnEdge( getMeshDS(), shr->GeomEdge(),/*skipMedium=*/true, nodes);
10173 // remove refinement nodes
10174 const SMDS_MeshNode* sn0 = shr->SrcNode(0), *sn1 = shr->SrcNode(1);
10175 const SMDS_MeshNode* tn0 = shr->TgtNode(0), *tn1 = shr->TgtNode(1);
10176 map< double, const SMDS_MeshNode* >::iterator u2n = nodes.begin();
10177 if ( u2n->second == sn0 || u2n->second == sn1 )
10179 while ( u2n->second != tn0 && u2n->second != tn1 )
10181 nodes.erase( nodes.begin(), u2n );
10183 u2n = --nodes.end();
10184 if ( u2n->second == sn0 || u2n->second == sn1 )
10186 while ( u2n->second != tn0 && u2n->second != tn1 )
10188 nodes.erase( ++u2n, nodes.end() );
10190 // set proxy sub-mesh
10191 uvPtVec.resize( nodes.size() );
10192 u2n = nodes.begin();
10193 BRepAdaptor_Curve2d curve( shr->GeomEdge(), F );
10194 for ( size_t i = 0; i < nodes.size(); ++i, ++u2n )
10196 uvPtVec[ i ].node = u2n->second;
10197 uvPtVec[ i ].param = u2n->first;
10198 uvPtVec[ i ].SetUV( curve.Value( u2n->first ).XY() );
10200 StdMeshers_FaceSide fSide( uvPtVec, F, shr->GeomEdge(), _mesh );
10201 StdMeshers_ViscousLayers2D::SetProxyMeshOfEdge( fSide );
10204 // set proxy mesh of EDGEs with layers
10205 vector< _LayerEdge* > edges;
10206 for ( size_t iS = 0; iS < subEOS.size(); ++iS )
10208 _EdgesOnShape& eos = * subEOS[ iS ];
10209 if ( eos.ShapeType() != TopAbs_EDGE ) continue;
10211 const TopoDS_Edge& E = TopoDS::Edge( eos._shape );
10212 data.SortOnEdge( E, eos._edges );
10215 if ( _EdgesOnShape* eov = data.GetShapeEdges( helper.IthVertex( 0, E, /*CumOri=*/false )))
10216 if ( !eov->_edges.empty() )
10217 edges.push_back( eov->_edges[0] ); // on 1st VERTEX
10219 edges.insert( edges.end(), eos._edges.begin(), eos._edges.end() );
10221 if ( _EdgesOnShape* eov = data.GetShapeEdges( helper.IthVertex( 1, E, /*CumOri=*/false )))
10222 if ( !eov->_edges.empty() )
10223 edges.push_back( eov->_edges[0] ); // on last VERTEX
10225 uvPtVec.resize( edges.size() );
10226 for ( size_t i = 0; i < edges.size(); ++i )
10228 uvPtVec[ i ].node = edges[i]->_nodes.back();
10229 uvPtVec[ i ].param = helper.GetNodeU( E, edges[i]->_nodes[0] );
10230 uvPtVec[ i ].SetUV( helper.GetNodeUV( F, edges[i]->_nodes.back() ));
10232 BRep_Tool::Range( E, uvPtVec[0].param, uvPtVec.back().param );
10233 StdMeshers_FaceSide fSide( uvPtVec, F, E, _mesh );
10234 StdMeshers_ViscousLayers2D::SetProxyMeshOfEdge( fSide );
10236 // temporary clear the FACE sub-mesh from faces made by refine()
10237 vector< const SMDS_MeshElement* > elems;
10238 elems.reserve( smDS->NbElements() + smDS->NbNodes() );
10239 for ( SMDS_ElemIteratorPtr ite = smDS->GetElements(); ite->more(); )
10240 elems.push_back( ite->next() );
10241 for ( SMDS_NodeIteratorPtr ite = smDS->GetNodes(); ite->more(); )
10242 elems.push_back( ite->next() );
10245 // compute the mesh on the FACE
10246 sm->ComputeStateEngine( SMESH_subMesh::CHECK_COMPUTE_STATE );
10247 sm->ComputeStateEngine( SMESH_subMesh::COMPUTE_SUBMESH );
10249 // re-fill proxy sub-meshes of the FACE
10250 for ( size_t i = 0 ; i < _sdVec.size(); ++i )
10251 if (( psm = _sdVec[i]._proxyMesh->getFaceSubM( F )))
10252 for ( SMDS_ElemIteratorPtr ite = smDS->GetElements(); ite->more(); )
10253 psm->AddElement( ite->next() );
10256 for ( size_t i = 0; i < elems.size(); ++i )
10257 smDS->AddElement( elems[i] );
10259 if ( sm->GetComputeState() != SMESH_subMesh::COMPUTE_OK )
10260 return error( errMsg );
10262 } // end of re-meshing in case of failed smoothing
10265 // No wrongly shaped faces remain; final smooth. Set node XYZ.
10266 bool isStructuredFixed = false;
10267 if ( SMESH_2D_Algo* algo = dynamic_cast<SMESH_2D_Algo*>( sm->GetAlgo() ))
10268 isStructuredFixed = algo->FixInternalNodes( *data._proxyMesh, F );
10269 if ( !isStructuredFixed )
10271 if ( isConcaveFace ) // fix narrow faces by swapping diagonals
10272 fixBadFaces( F, helper, /*is2D=*/false, ++shriStep );
10274 for ( int st = 3; st; --st )
10277 case 1: smoothType = _SmoothNode::LAPLACIAN; break;
10278 case 2: smoothType = _SmoothNode::LAPLACIAN; break;
10279 case 3: smoothType = _SmoothNode::ANGULAR; break;
10281 dumpFunction(SMESH_Comment("shrinkFace")<<f2sd->first<<"_st"<<++smooStep); // debug
10282 for ( size_t i = 0; i < nodesToSmooth.size(); ++i )
10284 nodesToSmooth[i].Smooth( nbBad,surface,helper,refSign,
10285 smoothType,/*set3D=*/st==1 );
10290 if ( !getMeshDS()->IsEmbeddedMode() )
10291 // Log node movement
10292 for ( size_t i = 0; i < nodesToSmooth.size(); ++i )
10294 SMESH_TNodeXYZ p ( nodesToSmooth[i]._node );
10295 getMeshDS()->MoveNode( nodesToSmooth[i]._node, p.X(), p.Y(), p.Z() );
10299 // Set an event listener to clear FACE sub-mesh together with SOLID sub-mesh
10300 VISCOUS_3D::ToClearSubWithMain( sm, data._solid );
10302 VISCOUS_3D::ToClearSubWithMain( sm, data2->_solid );
10304 } // loop on FACES to srink mesh on
10307 // Replace source nodes by target nodes in shrinked mesh edges
10309 map< int, _Shrinker1D >::iterator e2shr = e2shrMap.begin();
10310 for ( ; e2shr != e2shrMap.end(); ++e2shr )
10311 e2shr->second.SwapSrcTgtNodes( getMeshDS() );
10316 //================================================================================
10318 * \brief Computes 2d shrink direction and finds nodes limiting shrinking
10320 //================================================================================
10322 bool _ViscousBuilder::prepareEdgeToShrink( _LayerEdge& edge,
10323 _EdgesOnShape& eos,
10324 SMESH_MesherHelper& helper,
10325 const SMESHDS_SubMesh* faceSubMesh)
10327 const SMDS_MeshNode* srcNode = edge._nodes[0];
10328 const SMDS_MeshNode* tgtNode = edge._nodes.back();
10330 if ( eos.SWOLType() == TopAbs_FACE )
10332 if ( tgtNode->GetPosition()->GetDim() != 2 ) // not inflated edge
10335 edge.Set( _LayerEdge::SHRUNK );
10336 return srcNode == tgtNode;
10338 gp_XY srcUV ( edge._pos[0].X(), edge._pos[0].Y() ); //helper.GetNodeUV( F, srcNode );
10339 gp_XY tgtUV = edge.LastUV( TopoDS::Face( eos._sWOL ), eos ); //helper.GetNodeUV( F, tgtNode );
10340 gp_Vec2d uvDir( srcUV, tgtUV );
10341 double uvLen = uvDir.Magnitude();
10343 edge._normal.SetCoord( uvDir.X(),uvDir.Y(), 0 );
10346 //edge._pos.resize(1);
10347 edge._pos[0].SetCoord( tgtUV.X(), tgtUV.Y(), 0 );
10349 // set UV of source node to target node
10350 SMDS_FacePosition* pos = static_cast<SMDS_FacePosition*>( tgtNode->GetPosition() );
10351 pos->SetUParameter( srcUV.X() );
10352 pos->SetVParameter( srcUV.Y() );
10354 else // _sWOL is TopAbs_EDGE
10356 if ( tgtNode->GetPosition()->GetDim() != 1 ) // not inflated edge
10359 edge.Set( _LayerEdge::SHRUNK );
10360 return srcNode == tgtNode;
10362 const TopoDS_Edge& E = TopoDS::Edge( eos._sWOL );
10363 SMESHDS_SubMesh* edgeSM = getMeshDS()->MeshElements( E );
10364 if ( !edgeSM || edgeSM->NbElements() == 0 )
10365 return error(SMESH_Comment("Not meshed EDGE ") << getMeshDS()->ShapeToIndex( E ));
10367 const SMDS_MeshNode* n2 = 0;
10368 SMDS_ElemIteratorPtr eIt = srcNode->GetInverseElementIterator(SMDSAbs_Edge);
10369 while ( eIt->more() && !n2 )
10371 const SMDS_MeshElement* e = eIt->next();
10372 if ( !edgeSM->Contains(e)) continue;
10373 n2 = e->GetNode( 0 );
10374 if ( n2 == srcNode ) n2 = e->GetNode( 1 );
10377 return error(SMESH_Comment("Wrongly meshed EDGE ") << getMeshDS()->ShapeToIndex( E ));
10379 double uSrc = helper.GetNodeU( E, srcNode, n2 );
10380 double uTgt = helper.GetNodeU( E, tgtNode, srcNode );
10381 double u2 = helper.GetNodeU( E, n2, srcNode );
10383 //edge._pos.clear();
10385 if ( fabs( uSrc-uTgt ) < 0.99 * fabs( uSrc-u2 ))
10387 // tgtNode is located so that it does not make faces with wrong orientation
10388 edge.Set( _LayerEdge::SHRUNK );
10391 //edge._pos.resize(1);
10392 edge._pos[0].SetCoord( U_TGT, uTgt );
10393 edge._pos[0].SetCoord( U_SRC, uSrc );
10394 edge._pos[0].SetCoord( LEN_TGT, fabs( uSrc-uTgt ));
10396 edge._simplices.resize( 1 );
10397 edge._simplices[0]._nPrev = n2;
10399 // set U of source node to the target node
10400 SMDS_EdgePosition* pos = static_cast<SMDS_EdgePosition*>( tgtNode->GetPosition() );
10401 pos->SetUParameter( uSrc );
10406 //================================================================================
10408 * \brief Restore position of a sole node of a _LayerEdge based on _noShrinkShapes
10410 //================================================================================
10412 void _ViscousBuilder::restoreNoShrink( _LayerEdge& edge ) const
10414 if ( edge._nodes.size() == 1 )
10419 const SMDS_MeshNode* srcNode = edge._nodes[0];
10420 TopoDS_Shape S = SMESH_MesherHelper::GetSubShapeByNode( srcNode, getMeshDS() );
10421 if ( S.IsNull() ) return;
10425 switch ( S.ShapeType() )
10430 TopLoc_Location loc;
10431 Handle(Geom_Curve) curve = BRep_Tool::Curve( TopoDS::Edge( S ), loc, f, l );
10432 if ( curve.IsNull() ) return;
10433 SMDS_EdgePosition* ePos = static_cast<SMDS_EdgePosition*>( srcNode->GetPosition() );
10434 p = curve->Value( ePos->GetUParameter() );
10437 case TopAbs_VERTEX:
10439 p = BRep_Tool::Pnt( TopoDS::Vertex( S ));
10444 getMeshDS()->MoveNode( srcNode, p.X(), p.Y(), p.Z() );
10445 dumpMove( srcNode );
10449 //================================================================================
10451 * \brief Try to fix triangles with high aspect ratio by swaping diagonals
10453 //================================================================================
10455 void _ViscousBuilder::fixBadFaces(const TopoDS_Face& F,
10456 SMESH_MesherHelper& helper,
10459 set<const SMDS_MeshNode*> * involvedNodes)
10461 SMESH::Controls::AspectRatio qualifier;
10462 SMESH::Controls::TSequenceOfXYZ points(3), points1(3), points2(3);
10463 const double maxAspectRatio = is2D ? 4. : 2;
10464 _NodeCoordHelper xyz( F, helper, is2D );
10466 // find bad triangles
10468 vector< const SMDS_MeshElement* > badTrias;
10469 vector< double > badAspects;
10470 SMESHDS_SubMesh* sm = helper.GetMeshDS()->MeshElements( F );
10471 SMDS_ElemIteratorPtr fIt = sm->GetElements();
10472 while ( fIt->more() )
10474 const SMDS_MeshElement * f = fIt->next();
10475 if ( f->NbCornerNodes() != 3 ) continue;
10476 for ( int iP = 0; iP < 3; ++iP ) points(iP+1) = xyz( f->GetNode(iP));
10477 double aspect = qualifier.GetValue( points );
10478 if ( aspect > maxAspectRatio )
10480 badTrias.push_back( f );
10481 badAspects.push_back( aspect );
10486 dumpFunction(SMESH_Comment("beforeSwapDiagonals_F")<<helper.GetSubShapeID());
10487 SMDS_ElemIteratorPtr fIt = sm->GetElements();
10488 while ( fIt->more() )
10490 const SMDS_MeshElement * f = fIt->next();
10491 if ( f->NbCornerNodes() == 3 )
10492 dumpChangeNodes( f );
10496 if ( badTrias.empty() )
10499 // find couples of faces to swap diagonal
10501 typedef pair < const SMDS_MeshElement* , const SMDS_MeshElement* > T2Trias;
10502 vector< T2Trias > triaCouples;
10504 TIDSortedElemSet involvedFaces, emptySet;
10505 for ( size_t iTia = 0; iTia < badTrias.size(); ++iTia )
10508 double aspRatio [3];
10511 if ( !involvedFaces.insert( badTrias[iTia] ).second )
10513 for ( int iP = 0; iP < 3; ++iP )
10514 points(iP+1) = xyz( badTrias[iTia]->GetNode(iP));
10516 // find triangles adjacent to badTrias[iTia] with better aspect ratio after diag-swaping
10517 int bestCouple = -1;
10518 for ( int iSide = 0; iSide < 3; ++iSide )
10520 const SMDS_MeshNode* n1 = badTrias[iTia]->GetNode( iSide );
10521 const SMDS_MeshNode* n2 = badTrias[iTia]->GetNode(( iSide+1 ) % 3 );
10522 trias [iSide].first = badTrias[iTia];
10523 trias [iSide].second = SMESH_MeshAlgos::FindFaceInSet( n1, n2, emptySet, involvedFaces,
10525 if (( ! trias[iSide].second ) ||
10526 ( trias[iSide].second->NbCornerNodes() != 3 ) ||
10527 ( ! sm->Contains( trias[iSide].second )))
10530 // aspect ratio of an adjacent tria
10531 for ( int iP = 0; iP < 3; ++iP )
10532 points2(iP+1) = xyz( trias[iSide].second->GetNode(iP));
10533 double aspectInit = qualifier.GetValue( points2 );
10535 // arrange nodes as after diag-swaping
10536 if ( helper.WrapIndex( i1+1, 3 ) == i2 )
10537 i3 = helper.WrapIndex( i1-1, 3 );
10539 i3 = helper.WrapIndex( i1+1, 3 );
10541 points1( 1+ iSide ) = points2( 1+ i3 );
10542 points2( 1+ i2 ) = points1( 1+ ( iSide+2 ) % 3 );
10544 // aspect ratio after diag-swaping
10545 aspRatio[ iSide ] = qualifier.GetValue( points1 ) + qualifier.GetValue( points2 );
10546 if ( aspRatio[ iSide ] > aspectInit + badAspects[ iTia ] )
10549 // prevent inversion of a triangle
10550 gp_Vec norm1 = gp_Vec( points1(1), points1(3) ) ^ gp_Vec( points1(1), points1(2) );
10551 gp_Vec norm2 = gp_Vec( points2(1), points2(3) ) ^ gp_Vec( points2(1), points2(2) );
10552 if ( norm1 * norm2 < 0. && norm1.Angle( norm2 ) > 70./180.*M_PI )
10555 if ( bestCouple < 0 || aspRatio[ bestCouple ] > aspRatio[ iSide ] )
10556 bestCouple = iSide;
10559 if ( bestCouple >= 0 )
10561 triaCouples.push_back( trias[bestCouple] );
10562 involvedFaces.insert ( trias[bestCouple].second );
10566 involvedFaces.erase( badTrias[iTia] );
10569 if ( triaCouples.empty() )
10574 SMESH_MeshEditor editor( helper.GetMesh() );
10575 dumpFunction(SMESH_Comment("beforeSwapDiagonals_F")<<helper.GetSubShapeID()<<"_"<<step);
10576 for ( size_t i = 0; i < triaCouples.size(); ++i )
10578 dumpChangeNodes( triaCouples[i].first );
10579 dumpChangeNodes( triaCouples[i].second );
10580 editor.InverseDiag( triaCouples[i].first, triaCouples[i].second );
10583 if ( involvedNodes )
10584 for ( size_t i = 0; i < triaCouples.size(); ++i )
10586 involvedNodes->insert( triaCouples[i].first->begin_nodes(),
10587 triaCouples[i].first->end_nodes() );
10588 involvedNodes->insert( triaCouples[i].second->begin_nodes(),
10589 triaCouples[i].second->end_nodes() );
10592 // just for debug dump resulting triangles
10593 dumpFunction(SMESH_Comment("swapDiagonals_F")<<helper.GetSubShapeID()<<"_"<<step);
10594 for ( size_t i = 0; i < triaCouples.size(); ++i )
10596 dumpChangeNodes( triaCouples[i].first );
10597 dumpChangeNodes( triaCouples[i].second );
10601 //================================================================================
10603 * \brief Move target node to it's final position on the FACE during shrinking
10605 //================================================================================
10607 bool _LayerEdge::SetNewLength2d( Handle(Geom_Surface)& surface,
10608 const TopoDS_Face& F,
10609 _EdgesOnShape& eos,
10610 SMESH_MesherHelper& helper )
10613 return false; // already at the target position
10615 SMDS_MeshNode* tgtNode = const_cast< SMDS_MeshNode*& >( _nodes.back() );
10617 if ( eos.SWOLType() == TopAbs_FACE )
10619 gp_XY curUV = helper.GetNodeUV( F, tgtNode );
10620 gp_Pnt2d tgtUV( _pos[0].X(), _pos[0].Y() );
10621 gp_Vec2d uvDir( _normal.X(), _normal.Y() );
10622 const double uvLen = tgtUV.Distance( curUV );
10623 const double kSafe = Max( 0.5, 1. - 0.1 * _simplices.size() );
10625 // Select shrinking step such that not to make faces with wrong orientation.
10626 double stepSize = 1e100;
10627 for ( size_t i = 0; i < _simplices.size(); ++i )
10629 if ( !_simplices[i]._nPrev->isMarked() ||
10630 !_simplices[i]._nNext->isMarked() )
10631 continue; // simplex of quadrangle created by addBoundaryElements()
10633 // find intersection of 2 lines: curUV-tgtUV and that connecting simplex nodes
10634 gp_XY uvN1 = helper.GetNodeUV( F, _simplices[i]._nPrev );
10635 gp_XY uvN2 = helper.GetNodeUV( F, _simplices[i]._nNext );
10636 gp_XY dirN = uvN2 - uvN1;
10637 double det = uvDir.Crossed( dirN );
10638 if ( Abs( det ) < std::numeric_limits<double>::min() ) continue;
10639 gp_XY dirN2Cur = curUV - uvN1;
10640 double step = dirN.Crossed( dirN2Cur ) / det;
10642 stepSize = Min( step, stepSize );
10645 if ( uvLen <= stepSize )
10651 else if ( stepSize > 0 )
10653 newUV = curUV + uvDir.XY() * stepSize * kSafe;
10659 SMDS_FacePosition* pos = static_cast<SMDS_FacePosition*>( tgtNode->GetPosition() );
10660 pos->SetUParameter( newUV.X() );
10661 pos->SetVParameter( newUV.Y() );
10664 gp_Pnt p = surface->Value( newUV.X(), newUV.Y() );
10665 tgtNode->setXYZ( p.X(), p.Y(), p.Z() );
10666 dumpMove( tgtNode );
10669 else // _sWOL is TopAbs_EDGE
10671 const TopoDS_Edge& E = TopoDS::Edge( eos._sWOL );
10672 const SMDS_MeshNode* n2 = _simplices[0]._nPrev;
10673 SMDS_EdgePosition* tgtPos = static_cast<SMDS_EdgePosition*>( tgtNode->GetPosition() );
10675 const double u2 = helper.GetNodeU( E, n2, tgtNode );
10676 const double uSrc = _pos[0].Coord( U_SRC );
10677 const double lenTgt = _pos[0].Coord( LEN_TGT );
10679 double newU = _pos[0].Coord( U_TGT );
10680 if ( lenTgt < 0.99 * fabs( uSrc-u2 )) // n2 got out of src-tgt range
10682 Set( _LayerEdge::SHRUNK );
10687 newU = 0.1 * tgtPos->GetUParameter() + 0.9 * u2;
10689 tgtPos->SetUParameter( newU );
10691 gp_XY newUV = helper.GetNodeUV( F, tgtNode, _nodes[0]);
10692 gp_Pnt p = surface->Value( newUV.X(), newUV.Y() );
10693 tgtNode->setXYZ( p.X(), p.Y(), p.Z() );
10694 dumpMove( tgtNode );
10701 //================================================================================
10703 * \brief Perform smooth on the FACE
10704 * \retval bool - true if the node has been moved
10706 //================================================================================
10708 bool _SmoothNode::Smooth(int& nbBad,
10709 Handle(Geom_Surface)& surface,
10710 SMESH_MesherHelper& helper,
10711 const double refSign,
10715 const TopoDS_Face& face = TopoDS::Face( helper.GetSubShape() );
10717 // get uv of surrounding nodes
10718 vector<gp_XY> uv( _simplices.size() );
10719 for ( size_t i = 0; i < _simplices.size(); ++i )
10720 uv[i] = helper.GetNodeUV( face, _simplices[i]._nPrev, _node );
10722 // compute new UV for the node
10723 gp_XY newPos (0,0);
10724 if ( how == TFI && _simplices.size() == 4 )
10727 for ( size_t i = 0; i < _simplices.size(); ++i )
10728 if ( _simplices[i]._nOpp )
10729 corners[i] = helper.GetNodeUV( face, _simplices[i]._nOpp, _node );
10731 throw SALOME_Exception(LOCALIZED("TFI smoothing: _Simplex::_nOpp not set!"));
10733 newPos = helper.calcTFI ( 0.5, 0.5,
10734 corners[0], corners[1], corners[2], corners[3],
10735 uv[1], uv[2], uv[3], uv[0] );
10737 else if ( how == ANGULAR )
10739 newPos = computeAngularPos( uv, helper.GetNodeUV( face, _node ), refSign );
10741 else if ( how == CENTROIDAL && _simplices.size() > 3 )
10743 // average centers of diagonals wieghted with their reciprocal lengths
10744 if ( _simplices.size() == 4 )
10746 double w1 = 1. / ( uv[2]-uv[0] ).SquareModulus();
10747 double w2 = 1. / ( uv[3]-uv[1] ).SquareModulus();
10748 newPos = ( w1 * ( uv[2]+uv[0] ) + w2 * ( uv[3]+uv[1] )) / ( w1+w2 ) / 2;
10752 double sumWeight = 0;
10753 int nb = _simplices.size() == 4 ? 2 : _simplices.size();
10754 for ( int i = 0; i < nb; ++i )
10757 int iTo = i + _simplices.size() - 1;
10758 for ( int j = iFrom; j < iTo; ++j )
10760 int i2 = SMESH_MesherHelper::WrapIndex( j, _simplices.size() );
10761 double w = 1. / ( uv[i]-uv[i2] ).SquareModulus();
10763 newPos += w * ( uv[i]+uv[i2] );
10766 newPos /= 2 * sumWeight; // 2 is to get a middle between uv's
10771 // Laplacian smooth
10772 for ( size_t i = 0; i < _simplices.size(); ++i )
10774 newPos /= _simplices.size();
10777 // count quality metrics (orientation) of triangles around the node
10778 int nbOkBefore = 0;
10779 gp_XY tgtUV = helper.GetNodeUV( face, _node );
10780 for ( size_t i = 0; i < _simplices.size(); ++i )
10781 nbOkBefore += _simplices[i].IsForward( tgtUV, _node, face, helper, refSign );
10784 for ( size_t i = 0; i < _simplices.size(); ++i )
10785 nbOkAfter += _simplices[i].IsForward( newPos, _node, face, helper, refSign );
10787 if ( nbOkAfter < nbOkBefore )
10789 nbBad += _simplices.size() - nbOkBefore;
10793 SMDS_FacePosition* pos = static_cast<SMDS_FacePosition*>( _node->GetPosition() );
10794 pos->SetUParameter( newPos.X() );
10795 pos->SetVParameter( newPos.Y() );
10802 gp_Pnt p = surface->Value( newPos.X(), newPos.Y() );
10803 const_cast< SMDS_MeshNode* >( _node )->setXYZ( p.X(), p.Y(), p.Z() );
10807 nbBad += _simplices.size() - nbOkAfter;
10808 return ( (tgtUV-newPos).SquareModulus() > 1e-10 );
10811 //================================================================================
10813 * \brief Computes new UV using angle based smoothing technic
10815 //================================================================================
10817 gp_XY _SmoothNode::computeAngularPos(vector<gp_XY>& uv,
10818 const gp_XY& uvToFix,
10819 const double refSign)
10821 uv.push_back( uv.front() );
10823 vector< gp_XY > edgeDir ( uv.size() );
10824 vector< double > edgeSize( uv.size() );
10825 for ( size_t i = 1; i < edgeDir.size(); ++i )
10827 edgeDir [i-1] = uv[i] - uv[i-1];
10828 edgeSize[i-1] = edgeDir[i-1].Modulus();
10829 if ( edgeSize[i-1] < numeric_limits<double>::min() )
10830 edgeDir[i-1].SetX( 100 );
10832 edgeDir[i-1] /= edgeSize[i-1] * refSign;
10834 edgeDir.back() = edgeDir.front();
10835 edgeSize.back() = edgeSize.front();
10839 double sumSize = 0;
10840 for ( size_t i = 1; i < edgeDir.size(); ++i )
10842 if ( edgeDir[i-1].X() > 1. ) continue;
10844 while ( edgeDir[i].X() > 1. && ++i < edgeDir.size() );
10845 if ( i == edgeDir.size() ) break;
10847 gp_XY norm1( -edgeDir[i1].Y(), edgeDir[i1].X() );
10848 gp_XY norm2( -edgeDir[i].Y(), edgeDir[i].X() );
10849 gp_XY bisec = norm1 + norm2;
10850 double bisecSize = bisec.Modulus();
10851 if ( bisecSize < numeric_limits<double>::min() )
10853 bisec = -edgeDir[i1] + edgeDir[i];
10854 bisecSize = bisec.Modulus();
10856 bisec /= bisecSize;
10858 gp_XY dirToN = uvToFix - p;
10859 double distToN = dirToN.Modulus();
10860 if ( bisec * dirToN < 0 )
10861 distToN = -distToN;
10863 newPos += ( p + bisec * distToN ) * ( edgeSize[i1] + edgeSize[i] );
10865 sumSize += edgeSize[i1] + edgeSize[i];
10867 newPos /= /*nbEdges * */sumSize;
10871 //================================================================================
10873 * \brief Delete _SolidData
10875 //================================================================================
10877 _SolidData::~_SolidData()
10879 TNode2Edge::iterator n2e = _n2eMap.begin();
10880 for ( ; n2e != _n2eMap.end(); ++n2e )
10882 _LayerEdge* & e = n2e->second;
10885 delete e->_curvature;
10886 if ( e->_2neibors )
10887 delete e->_2neibors->_plnNorm;
10888 delete e->_2neibors;
10899 //================================================================================
10901 * \brief Keep a _LayerEdge inflated along the EDGE
10903 //================================================================================
10905 void _Shrinker1D::AddEdge( const _LayerEdge* e,
10906 _EdgesOnShape& eos,
10907 SMESH_MesherHelper& helper )
10910 if ( _nodes.empty() )
10912 _edges[0] = _edges[1] = 0;
10915 // check _LayerEdge
10916 if ( e == _edges[0] || e == _edges[1] || e->_nodes.size() < 2 )
10918 if ( eos.SWOLType() != TopAbs_EDGE )
10919 throw SALOME_Exception(LOCALIZED("Wrong _LayerEdge is added"));
10920 if ( _edges[0] && !_geomEdge.IsSame( eos._sWOL ))
10921 throw SALOME_Exception(LOCALIZED("Wrong _LayerEdge is added"));
10923 // store _LayerEdge
10924 _geomEdge = TopoDS::Edge( eos._sWOL );
10926 BRep_Tool::Range( _geomEdge, f,l );
10927 double u = helper.GetNodeU( _geomEdge, e->_nodes[0], e->_nodes.back());
10928 _edges[ u < 0.5*(f+l) ? 0 : 1 ] = e;
10932 const SMDS_MeshNode* tgtNode0 = TgtNode( 0 );
10933 const SMDS_MeshNode* tgtNode1 = TgtNode( 1 );
10935 if ( _nodes.empty() )
10937 SMESHDS_SubMesh * eSubMesh = helper.GetMeshDS()->MeshElements( _geomEdge );
10938 if ( !eSubMesh || eSubMesh->NbNodes() < 1 )
10940 TopLoc_Location loc;
10941 Handle(Geom_Curve) C = BRep_Tool::Curve( _geomEdge, loc, f,l );
10942 GeomAdaptor_Curve aCurve(C, f,l);
10943 const double totLen = GCPnts_AbscissaPoint::Length(aCurve, f, l);
10945 int nbExpectNodes = eSubMesh->NbNodes();
10946 _initU .reserve( nbExpectNodes );
10947 _normPar.reserve( nbExpectNodes );
10948 _nodes .reserve( nbExpectNodes );
10949 SMDS_NodeIteratorPtr nIt = eSubMesh->GetNodes();
10950 while ( nIt->more() )
10952 const SMDS_MeshNode* node = nIt->next();
10954 // skip refinement nodes
10955 if ( node->NbInverseElements(SMDSAbs_Edge) == 0 ||
10956 node == tgtNode0 || node == tgtNode1 )
10958 bool hasMarkedFace = false;
10959 SMDS_ElemIteratorPtr fIt = node->GetInverseElementIterator(SMDSAbs_Face);
10960 while ( fIt->more() && !hasMarkedFace )
10961 hasMarkedFace = fIt->next()->isMarked();
10962 if ( !hasMarkedFace )
10965 _nodes.push_back( node );
10966 _initU.push_back( helper.GetNodeU( _geomEdge, node ));
10967 double len = GCPnts_AbscissaPoint::Length(aCurve, f, _initU.back());
10968 _normPar.push_back( len / totLen );
10973 // remove target node of the _LayerEdge from _nodes
10974 size_t nbFound = 0;
10975 for ( size_t i = 0; i < _nodes.size(); ++i )
10976 if ( !_nodes[i] || _nodes[i] == tgtNode0 || _nodes[i] == tgtNode1 )
10977 _nodes[i] = 0, nbFound++;
10978 if ( nbFound == _nodes.size() )
10983 //================================================================================
10985 * \brief Move nodes on EDGE from ends where _LayerEdge's are inflated
10987 //================================================================================
10989 void _Shrinker1D::Compute(bool set3D, SMESH_MesherHelper& helper)
10991 if ( _done || _nodes.empty())
10993 const _LayerEdge* e = _edges[0];
10994 if ( !e ) e = _edges[1];
10997 _done = (( !_edges[0] || _edges[0]->Is( _LayerEdge::SHRUNK )) &&
10998 ( !_edges[1] || _edges[1]->Is( _LayerEdge::SHRUNK )));
11001 if ( set3D || _done )
11003 Handle(Geom_Curve) C = BRep_Tool::Curve(_geomEdge, f,l);
11004 GeomAdaptor_Curve aCurve(C, f,l);
11007 f = helper.GetNodeU( _geomEdge, _edges[0]->_nodes.back(), _nodes[0] );
11009 l = helper.GetNodeU( _geomEdge, _edges[1]->_nodes.back(), _nodes.back() );
11010 double totLen = GCPnts_AbscissaPoint::Length( aCurve, f, l );
11012 for ( size_t i = 0; i < _nodes.size(); ++i )
11014 if ( !_nodes[i] ) continue;
11015 double len = totLen * _normPar[i];
11016 GCPnts_AbscissaPoint discret( aCurve, len, f );
11017 if ( !discret.IsDone() )
11018 return throw SALOME_Exception(LOCALIZED("GCPnts_AbscissaPoint failed"));
11019 double u = discret.Parameter();
11020 SMDS_EdgePosition* pos = static_cast<SMDS_EdgePosition*>( _nodes[i]->GetPosition() );
11021 pos->SetUParameter( u );
11022 gp_Pnt p = C->Value( u );
11023 const_cast< SMDS_MeshNode*>( _nodes[i] )->setXYZ( p.X(), p.Y(), p.Z() );
11028 BRep_Tool::Range( _geomEdge, f,l );
11030 f = helper.GetNodeU( _geomEdge, _edges[0]->_nodes.back(), _nodes[0] );
11032 l = helper.GetNodeU( _geomEdge, _edges[1]->_nodes.back(), _nodes.back() );
11034 for ( size_t i = 0; i < _nodes.size(); ++i )
11036 if ( !_nodes[i] ) continue;
11037 double u = f * ( 1-_normPar[i] ) + l * _normPar[i];
11038 SMDS_EdgePosition* pos = static_cast<SMDS_EdgePosition*>( _nodes[i]->GetPosition() );
11039 pos->SetUParameter( u );
11044 //================================================================================
11046 * \brief Restore initial parameters of nodes on EDGE
11048 //================================================================================
11050 void _Shrinker1D::RestoreParams()
11053 for ( size_t i = 0; i < _nodes.size(); ++i )
11055 if ( !_nodes[i] ) continue;
11056 SMDS_EdgePosition* pos = static_cast<SMDS_EdgePosition*>( _nodes[i]->GetPosition() );
11057 pos->SetUParameter( _initU[i] );
11062 //================================================================================
11064 * \brief Replace source nodes by target nodes in shrinked mesh edges
11066 //================================================================================
11068 void _Shrinker1D::SwapSrcTgtNodes( SMESHDS_Mesh* mesh )
11070 const SMDS_MeshNode* nodes[3];
11071 for ( int i = 0; i < 2; ++i )
11073 if ( !_edges[i] ) continue;
11075 SMESHDS_SubMesh * eSubMesh = mesh->MeshElements( _geomEdge );
11076 if ( !eSubMesh ) return;
11077 const SMDS_MeshNode* srcNode = _edges[i]->_nodes[0];
11078 const SMDS_MeshNode* tgtNode = _edges[i]->_nodes.back();
11079 const SMDS_MeshNode* scdNode = _edges[i]->_nodes[1];
11080 SMDS_ElemIteratorPtr eIt = srcNode->GetInverseElementIterator(SMDSAbs_Edge);
11081 while ( eIt->more() )
11083 const SMDS_MeshElement* e = eIt->next();
11084 if ( !eSubMesh->Contains( e ) || e->GetNodeIndex( scdNode ) >= 0 )
11086 SMDS_ElemIteratorPtr nIt = e->nodesIterator();
11087 for ( int iN = 0; iN < e->NbNodes(); ++iN )
11089 const SMDS_MeshNode* n = static_cast<const SMDS_MeshNode*>( nIt->next() );
11090 nodes[iN] = ( n == srcNode ? tgtNode : n );
11092 mesh->ChangeElementNodes( e, nodes, e->NbNodes() );
11097 //================================================================================
11099 * \brief Creates 2D and 1D elements on boundaries of new prisms
11101 //================================================================================
11103 bool _ViscousBuilder::addBoundaryElements(_SolidData& data)
11105 SMESH_MesherHelper helper( *_mesh );
11107 vector< const SMDS_MeshNode* > faceNodes;
11109 //for ( size_t i = 0; i < _sdVec.size(); ++i )
11111 //_SolidData& data = _sdVec[i];
11112 TopTools_IndexedMapOfShape geomEdges;
11113 TopExp::MapShapes( data._solid, TopAbs_EDGE, geomEdges );
11114 for ( int iE = 1; iE <= geomEdges.Extent(); ++iE )
11116 const TopoDS_Edge& E = TopoDS::Edge( geomEdges(iE));
11117 const TGeomID edgeID = getMeshDS()->ShapeToIndex( E );
11118 if ( data._noShrinkShapes.count( edgeID ))
11121 // Get _LayerEdge's based on E
11123 map< double, const SMDS_MeshNode* > u2nodes;
11124 if ( !SMESH_Algo::GetSortedNodesOnEdge( getMeshDS(), E, /*ignoreMedium=*/false, u2nodes))
11127 vector< _LayerEdge* > ledges; ledges.reserve( u2nodes.size() );
11128 TNode2Edge & n2eMap = data._n2eMap;
11129 map< double, const SMDS_MeshNode* >::iterator u2n = u2nodes.begin();
11131 //check if 2D elements are needed on E
11132 TNode2Edge::iterator n2e = n2eMap.find( u2n->second );
11133 if ( n2e == n2eMap.end() ) continue; // no layers on vertex
11134 ledges.push_back( n2e->second );
11136 if (( n2e = n2eMap.find( u2n->second )) == n2eMap.end() )
11137 continue; // no layers on E
11138 ledges.push_back( n2eMap[ u2n->second ]);
11140 const SMDS_MeshNode* tgtN0 = ledges[0]->_nodes.back();
11141 const SMDS_MeshNode* tgtN1 = ledges[1]->_nodes.back();
11142 int nbSharedPyram = 0;
11143 SMDS_ElemIteratorPtr vIt = tgtN0->GetInverseElementIterator(SMDSAbs_Volume);
11144 while ( vIt->more() )
11146 const SMDS_MeshElement* v = vIt->next();
11147 nbSharedPyram += int( v->GetNodeIndex( tgtN1 ) >= 0 );
11149 if ( nbSharedPyram > 1 )
11150 continue; // not free border of the pyramid
11153 faceNodes.push_back( ledges[0]->_nodes[0] );
11154 faceNodes.push_back( ledges[1]->_nodes[0] );
11155 if ( ledges[0]->_nodes.size() > 1 ) faceNodes.push_back( ledges[0]->_nodes[1] );
11156 if ( ledges[1]->_nodes.size() > 1 ) faceNodes.push_back( ledges[1]->_nodes[1] );
11158 if ( getMeshDS()->FindElement( faceNodes, SMDSAbs_Face, /*noMedium=*/true))
11159 continue; // faces already created
11161 for ( ++u2n; u2n != u2nodes.end(); ++u2n )
11162 ledges.push_back( n2eMap[ u2n->second ]);
11164 // Find out orientation and type of face to create
11166 bool reverse = false, isOnFace;
11169 map< TGeomID, TopoDS_Shape >::iterator e2f = data._shrinkShape2Shape.find( edgeID );
11170 if (( isOnFace = ( e2f != data._shrinkShape2Shape.end() )))
11172 F = e2f->second.Oriented( TopAbs_FORWARD );
11173 reverse = ( helper.GetSubShapeOri( F, E ) == TopAbs_REVERSED );
11174 if ( helper.GetSubShapeOri( data._solid, F ) == TopAbs_REVERSED )
11175 reverse = !reverse, F.Reverse();
11176 if ( helper.IsReversedSubMesh( TopoDS::Face(F) ))
11177 reverse = !reverse;
11179 else if ( !data._ignoreFaceIds.count( e2f->first ))
11181 // find FACE with layers sharing E
11182 PShapeIteratorPtr fIt = helper.GetAncestors( E, *_mesh, TopAbs_FACE, &data._solid );
11184 F = *( fIt->next() );
11186 // Find the sub-mesh to add new faces
11187 SMESHDS_SubMesh* sm = 0;
11189 sm = getMeshDS()->MeshElements( F );
11191 sm = data._proxyMesh->getFaceSubM( TopoDS::Face(F), /*create=*/true );
11193 return error("error in addBoundaryElements()", data._index);
11195 // Find a proxy sub-mesh of the FACE of an adjacent SOLID, which will use the new boundary
11196 // faces for 3D meshing (PAL23414)
11197 SMESHDS_SubMesh* adjSM = 0;
11200 const TGeomID faceID = sm->GetID();
11201 PShapeIteratorPtr soIt = helper.GetAncestors( F, *_mesh, TopAbs_SOLID );
11202 while ( const TopoDS_Shape* solid = soIt->next() )
11203 if ( !solid->IsSame( data._solid ))
11205 size_t iData = _solids.FindIndex( *solid ) - 1;
11206 if ( iData < _sdVec.size() &&
11207 _sdVec[ iData ]._ignoreFaceIds.count( faceID ) &&
11208 _sdVec[ iData ]._shrinkShape2Shape.count( edgeID ) == 0 )
11210 SMESH_ProxyMesh::SubMesh* proxySub =
11211 _sdVec[ iData ]._proxyMesh->getFaceSubM( TopoDS::Face( F ), /*create=*/false);
11212 if ( proxySub && proxySub->NbElements() > 0 )
11219 const int dj1 = reverse ? 0 : 1;
11220 const int dj2 = reverse ? 1 : 0;
11221 vector< const SMDS_MeshElement*> ff; // new faces row
11222 SMESHDS_Mesh* m = getMeshDS();
11223 for ( size_t j = 1; j < ledges.size(); ++j )
11225 vector< const SMDS_MeshNode*>& nn1 = ledges[j-dj1]->_nodes;
11226 vector< const SMDS_MeshNode*>& nn2 = ledges[j-dj2]->_nodes;
11227 ff.resize( std::max( nn1.size(), nn2.size() ), NULL );
11228 if ( nn1.size() == nn2.size() )
11231 for ( size_t z = 1; z < nn1.size(); ++z )
11232 sm->AddElement( ff[z-1] = m->AddFace( nn1[z-1], nn2[z-1], nn2[z], nn1[z] ));
11234 for ( size_t z = 1; z < nn1.size(); ++z )
11235 sm->AddElement( new SMDS_FaceOfNodes( nn1[z-1], nn2[z-1], nn2[z], nn1[z] ));
11237 else if ( nn1.size() == 1 )
11240 for ( size_t z = 1; z < nn2.size(); ++z )
11241 sm->AddElement( ff[z-1] = m->AddFace( nn1[0], nn2[z-1], nn2[z] ));
11243 for ( size_t z = 1; z < nn2.size(); ++z )
11244 sm->AddElement( new SMDS_FaceOfNodes( nn1[0], nn2[z-1], nn2[z] ));
11249 for ( size_t z = 1; z < nn1.size(); ++z )
11250 sm->AddElement( ff[z-1] = m->AddFace( nn1[z-1], nn2[0], nn1[z] ));
11252 for ( size_t z = 1; z < nn1.size(); ++z )
11253 sm->AddElement( new SMDS_FaceOfNodes( nn1[z-1], nn2[0], nn2[z] ));
11256 if ( adjSM ) // add faces to a proxy SM of the adjacent SOLID
11258 for ( size_t z = 0; z < ff.size(); ++z )
11260 adjSM->AddElement( ff[ z ]);
11266 for ( int isFirst = 0; isFirst < 2; ++isFirst )
11268 _LayerEdge* edge = isFirst ? ledges.front() : ledges.back();
11269 _EdgesOnShape* eos = data.GetShapeEdges( edge );
11270 if ( eos && eos->SWOLType() == TopAbs_EDGE )
11272 vector< const SMDS_MeshNode*>& nn = edge->_nodes;
11273 if ( nn.size() < 2 || nn[1]->NbInverseElements( SMDSAbs_Edge ) >= 2 )
11275 helper.SetSubShape( eos->_sWOL );
11276 helper.SetElementsOnShape( true );
11277 for ( size_t z = 1; z < nn.size(); ++z )
11278 helper.AddEdge( nn[z-1], nn[z] );
11282 } // loop on EDGE's
11283 } // loop on _SolidData's