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 "SMESH_Algo.hxx"
34 #include "SMESH_ComputeError.hxx"
35 #include "SMESH_ControlsDef.hxx"
36 #include "SMESH_Gen.hxx"
37 #include "SMESH_Group.hxx"
38 #include "SMESH_HypoFilter.hxx"
39 #include "SMESH_Mesh.hxx"
40 #include "SMESH_MeshAlgos.hxx"
41 #include "SMESH_MesherHelper.hxx"
42 #include "SMESH_ProxyMesh.hxx"
43 #include "SMESH_subMesh.hxx"
44 #include "SMESH_subMeshEventListener.hxx"
45 #include "StdMeshers_FaceSide.hxx"
46 #include "StdMeshers_ViscousLayers2D.hxx"
48 #include <Adaptor3d_HSurface.hxx>
49 #include <BRepAdaptor_Curve.hxx>
50 #include <BRepAdaptor_Curve2d.hxx>
51 #include <BRepAdaptor_Surface.hxx>
52 #include <BRepLProp_SLProps.hxx>
53 #include <BRepOffsetAPI_MakeOffsetShape.hxx>
54 #include <BRep_Tool.hxx>
55 #include <Bnd_B2d.hxx>
56 #include <Bnd_B3d.hxx>
58 #include <GCPnts_AbscissaPoint.hxx>
59 #include <GCPnts_TangentialDeflection.hxx>
60 #include <Geom2d_Circle.hxx>
61 #include <Geom2d_Line.hxx>
62 #include <Geom2d_TrimmedCurve.hxx>
63 #include <GeomAdaptor_Curve.hxx>
64 #include <GeomLib.hxx>
65 #include <Geom_Circle.hxx>
66 #include <Geom_Curve.hxx>
67 #include <Geom_Line.hxx>
68 #include <Geom_TrimmedCurve.hxx>
69 #include <Precision.hxx>
70 #include <Standard_ErrorHandler.hxx>
71 #include <Standard_Failure.hxx>
72 #include <TColStd_Array1OfReal.hxx>
74 #include <TopExp_Explorer.hxx>
75 #include <TopTools_IndexedMapOfShape.hxx>
76 #include <TopTools_ListOfShape.hxx>
77 #include <TopTools_MapIteratorOfMapOfShape.hxx>
78 #include <TopTools_MapOfShape.hxx>
80 #include <TopoDS_Edge.hxx>
81 #include <TopoDS_Face.hxx>
82 #include <TopoDS_Vertex.hxx>
84 #include <gp_Cone.hxx>
85 #include <gp_Sphere.hxx>
97 //#define __NOT_INVALIDATE_BAD_SMOOTH
100 #define INCREMENTAL_SMOOTH // smooth only if min angle is too small
101 #define BLOCK_INFLATION // of individual _LayerEdge's
102 #define OLD_NEF_POLYGON
106 //================================================================================
111 enum UIndex { U_TGT = 1, U_SRC, LEN_TGT };
113 const double theMinSmoothCosin = 0.1;
114 const double theSmoothThickToElemSizeRatio = 0.3;
115 const double theMinSmoothTriaAngle = 30;
116 const double theMinSmoothQuadAngle = 45;
118 // what part of thickness is allowed till intersection
119 // (defined by SALOME_TESTS/Grids/smesh/viscous_layers_00/A5)
120 const double theThickToIntersection = 1.5;
122 bool needSmoothing( double cosin, double tgtThick, double elemSize )
124 return cosin * tgtThick > theSmoothThickToElemSizeRatio * elemSize;
126 double getSmoothingThickness( double cosin, double elemSize )
128 return theSmoothThickToElemSizeRatio * elemSize / cosin;
132 * \brief SMESH_ProxyMesh computed by _ViscousBuilder for a SOLID.
133 * It is stored in a SMESH_subMesh of the SOLID as SMESH_subMeshEventListenerData
135 struct _MeshOfSolid : public SMESH_ProxyMesh,
136 public SMESH_subMeshEventListenerData
138 bool _n2nMapComputed;
139 SMESH_ComputeErrorPtr _warning;
141 _MeshOfSolid( SMESH_Mesh* mesh)
142 :SMESH_subMeshEventListenerData( /*isDeletable=*/true),_n2nMapComputed(false)
144 SMESH_ProxyMesh::setMesh( *mesh );
147 // returns submesh for a geom face
148 SMESH_ProxyMesh::SubMesh* getFaceSubM(const TopoDS_Face& F, bool create=false)
150 TGeomID i = SMESH_ProxyMesh::shapeIndex(F);
151 return create ? SMESH_ProxyMesh::getProxySubMesh(i) : findProxySubMesh(i);
153 void setNode2Node(const SMDS_MeshNode* srcNode,
154 const SMDS_MeshNode* proxyNode,
155 const SMESH_ProxyMesh::SubMesh* subMesh)
157 SMESH_ProxyMesh::setNode2Node( srcNode,proxyNode,subMesh);
160 //--------------------------------------------------------------------------------
162 * \brief Listener of events of 3D sub-meshes computed with viscous layers.
163 * It is used to clear an inferior dim sub-meshes modified by viscous layers
165 class _ShrinkShapeListener : SMESH_subMeshEventListener
167 _ShrinkShapeListener()
168 : SMESH_subMeshEventListener(/*isDeletable=*/false,
169 "StdMeshers_ViscousLayers::_ShrinkShapeListener") {}
171 static SMESH_subMeshEventListener* Get() { static _ShrinkShapeListener l; return &l; }
172 virtual void ProcessEvent(const int event,
174 SMESH_subMesh* solidSM,
175 SMESH_subMeshEventListenerData* data,
176 const SMESH_Hypothesis* hyp)
178 if ( SMESH_subMesh::COMPUTE_EVENT == eventType && solidSM->IsEmpty() && data )
180 SMESH_subMeshEventListener::ProcessEvent(event,eventType,solidSM,data,hyp);
184 //--------------------------------------------------------------------------------
186 * \brief Listener of events of 3D sub-meshes computed with viscous layers.
187 * It is used to store data computed by _ViscousBuilder for a sub-mesh and to
188 * delete the data as soon as it has been used
190 class _ViscousListener : SMESH_subMeshEventListener
193 SMESH_subMeshEventListener(/*isDeletable=*/false,
194 "StdMeshers_ViscousLayers::_ViscousListener") {}
195 static SMESH_subMeshEventListener* Get() { static _ViscousListener l; return &l; }
197 virtual void ProcessEvent(const int event,
199 SMESH_subMesh* subMesh,
200 SMESH_subMeshEventListenerData* data,
201 const SMESH_Hypothesis* hyp)
203 if (( SMESH_subMesh::COMPUTE_EVENT == eventType ) &&
204 ( SMESH_subMesh::CHECK_COMPUTE_STATE != event &&
205 SMESH_subMesh::SUBMESH_COMPUTED != event ))
207 // delete SMESH_ProxyMesh containing temporary faces
208 subMesh->DeleteEventListener( this );
211 // Finds or creates proxy mesh of the solid
212 static _MeshOfSolid* GetSolidMesh(SMESH_Mesh* mesh,
213 const TopoDS_Shape& solid,
216 if ( !mesh ) return 0;
217 SMESH_subMesh* sm = mesh->GetSubMesh(solid);
218 _MeshOfSolid* data = (_MeshOfSolid*) sm->GetEventListenerData( Get() );
219 if ( !data && toCreate )
221 data = new _MeshOfSolid(mesh);
222 data->mySubMeshes.push_back( sm ); // to find SOLID by _MeshOfSolid
223 sm->SetEventListener( Get(), data, sm );
227 // Removes proxy mesh of the solid
228 static void RemoveSolidMesh(SMESH_Mesh* mesh, const TopoDS_Shape& solid)
230 mesh->GetSubMesh(solid)->DeleteEventListener( _ViscousListener::Get() );
234 //================================================================================
236 * \brief sets a sub-mesh event listener to clear sub-meshes of sub-shapes of
237 * the main shape when sub-mesh of the main shape is cleared,
238 * for example to clear sub-meshes of FACEs when sub-mesh of a SOLID
241 //================================================================================
243 void ToClearSubWithMain( SMESH_subMesh* sub, const TopoDS_Shape& main)
245 SMESH_subMesh* mainSM = sub->GetFather()->GetSubMesh( main );
246 SMESH_subMeshEventListenerData* data =
247 mainSM->GetEventListenerData( _ShrinkShapeListener::Get());
250 if ( find( data->mySubMeshes.begin(), data->mySubMeshes.end(), sub ) ==
251 data->mySubMeshes.end())
252 data->mySubMeshes.push_back( sub );
256 data = SMESH_subMeshEventListenerData::MakeData( /*dependent=*/sub );
257 sub->SetEventListener( _ShrinkShapeListener::Get(), data, /*whereToListenTo=*/mainSM );
261 //--------------------------------------------------------------------------------
263 * \brief Simplex (triangle or tetrahedron) based on 1 (tria) or 2 (tet) nodes of
264 * _LayerEdge and 2 nodes of the mesh surface beening smoothed.
265 * The class is used to check validity of face or volumes around a smoothed node;
266 * it stores only 2 nodes as the other nodes are stored by _LayerEdge.
270 const SMDS_MeshNode *_nPrev, *_nNext; // nodes on a smoothed mesh surface
271 const SMDS_MeshNode *_nOpp; // in 2D case, a node opposite to a smoothed node in QUAD
272 _Simplex(const SMDS_MeshNode* nPrev=0,
273 const SMDS_MeshNode* nNext=0,
274 const SMDS_MeshNode* nOpp=0)
275 : _nPrev(nPrev), _nNext(nNext), _nOpp(nOpp) {}
276 bool IsForward(const gp_XYZ* pntSrc, const gp_XYZ* pntTgt, double& vol) const
278 const double M[3][3] =
279 {{ _nNext->X() - pntSrc->X(), _nNext->Y() - pntSrc->Y(), _nNext->Z() - pntSrc->Z() },
280 { pntTgt->X() - pntSrc->X(), pntTgt->Y() - pntSrc->Y(), pntTgt->Z() - pntSrc->Z() },
281 { _nPrev->X() - pntSrc->X(), _nPrev->Y() - pntSrc->Y(), _nPrev->Z() - pntSrc->Z() }};
282 vol = ( + M[0][0] * M[1][1] * M[2][2]
283 + M[0][1] * M[1][2] * M[2][0]
284 + M[0][2] * M[1][0] * M[2][1]
285 - M[0][0] * M[1][2] * M[2][1]
286 - M[0][1] * M[1][0] * M[2][2]
287 - M[0][2] * M[1][1] * M[2][0]);
290 bool IsForward(const SMDS_MeshNode* nSrc, const gp_XYZ& pTgt, double& vol) const
292 SMESH_TNodeXYZ pSrc( nSrc );
293 return IsForward( &pSrc, &pTgt, vol );
295 bool IsForward(const gp_XY& tgtUV,
296 const SMDS_MeshNode* smoothedNode,
297 const TopoDS_Face& face,
298 SMESH_MesherHelper& helper,
299 const double refSign) const
301 gp_XY prevUV = helper.GetNodeUV( face, _nPrev, smoothedNode );
302 gp_XY nextUV = helper.GetNodeUV( face, _nNext, smoothedNode );
303 gp_Vec2d v1( tgtUV, prevUV ), v2( tgtUV, nextUV );
305 return d*refSign > 1e-100;
307 bool IsMinAngleOK( const gp_XYZ& pTgt, double& minAngle ) const
309 SMESH_TNodeXYZ pPrev( _nPrev ), pNext( _nNext );
310 if ( !_nOpp ) // triangle
312 gp_Vec tp( pPrev - pTgt ), pn( pNext - pPrev ), nt( pTgt - pNext );
313 double tp2 = tp.SquareMagnitude();
314 double pn2 = pn.SquareMagnitude();
315 double nt2 = nt.SquareMagnitude();
317 if ( tp2 < pn2 && tp2 < nt2 )
318 minAngle = ( nt * -pn ) * ( nt * -pn ) / nt2 / pn2;
319 else if ( pn2 < nt2 )
320 minAngle = ( tp * -nt ) * ( tp * -nt ) / tp2 / nt2;
322 minAngle = ( pn * -tp ) * ( pn * -tp ) / pn2 / tp2;
324 static double theMaxCos2 = ( Cos( theMinSmoothTriaAngle * M_PI / 180. ) *
325 Cos( theMinSmoothTriaAngle * M_PI / 180. ));
326 return minAngle < theMaxCos2;
330 SMESH_TNodeXYZ pOpp( _nOpp );
331 gp_Vec tp( pPrev - pTgt ), po( pOpp - pPrev ), on( pNext - pOpp), nt( pTgt - pNext );
332 double tp2 = tp.SquareMagnitude();
333 double po2 = po.SquareMagnitude();
334 double on2 = on.SquareMagnitude();
335 double nt2 = nt.SquareMagnitude();
336 minAngle = Max( Max((( tp * -nt ) * ( tp * -nt ) / tp2 / nt2 ),
337 (( po * -tp ) * ( po * -tp ) / po2 / tp2 )),
338 Max((( on * -po ) * ( on * -po ) / on2 / po2 ),
339 (( nt * -on ) * ( nt * -on ) / nt2 / on2 )));
341 static double theMaxCos2 = ( Cos( theMinSmoothQuadAngle * M_PI / 180. ) *
342 Cos( theMinSmoothQuadAngle * M_PI / 180. ));
343 return minAngle < theMaxCos2;
346 bool IsNeighbour(const _Simplex& other) const
348 return _nPrev == other._nNext || _nNext == other._nPrev;
350 bool Includes( const SMDS_MeshNode* node ) const { return _nPrev == node || _nNext == node; }
351 static void GetSimplices( const SMDS_MeshNode* node,
352 vector<_Simplex>& simplices,
353 const set<TGeomID>& ingnoreShapes,
354 const _SolidData* dataToCheckOri = 0,
355 const bool toSort = false);
356 static void SortSimplices(vector<_Simplex>& simplices);
358 //--------------------------------------------------------------------------------
360 * Structure used to take into account surface curvature while smoothing
365 double _k; // factor to correct node smoothed position
366 double _h2lenRatio; // avgNormProj / (2*avgDist)
367 gp_Pnt2d _uv; // UV used in putOnOffsetSurface()
369 static _Curvature* New( double avgNormProj, double avgDist )
372 if ( fabs( avgNormProj / avgDist ) > 1./200 )
375 c->_r = avgDist * avgDist / avgNormProj;
376 c->_k = avgDist * avgDist / c->_r / c->_r;
377 //c->_k = avgNormProj / c->_r;
378 c->_k *= ( c->_r < 0 ? 1/1.1 : 1.1 ); // not to be too restrictive
379 c->_h2lenRatio = avgNormProj / ( avgDist + avgDist );
381 c->_uv.SetCoord( 0., 0. );
385 double lenDelta(double len) const { return _k * ( _r + len ); }
386 double lenDeltaByDist(double dist) const { return dist * _h2lenRatio; }
388 //--------------------------------------------------------------------------------
392 struct _EdgesOnShape;
394 typedef map< const SMDS_MeshNode*, _LayerEdge*, TIDCompare > TNode2Edge;
396 //--------------------------------------------------------------------------------
398 * \brief Edge normal to surface, connecting a node on solid surface (_nodes[0])
399 * and a node of the most internal layer (_nodes.back())
403 typedef gp_XYZ (_LayerEdge::*PSmooFun)();
405 vector< const SMDS_MeshNode*> _nodes;
407 gp_XYZ _normal; // to boundary of solid
408 vector<gp_XYZ> _pos; // points computed during inflation
409 double _len; // length achived with the last inflation step
410 double _maxLen; // maximal possible length
411 double _cosin; // of angle (_normal ^ surface)
412 double _minAngle; // of _simplices
413 double _lenFactor; // to compute _len taking _cosin into account
416 // simplices connected to the source node (_nodes[0]);
417 // used for smoothing and quality check of _LayerEdge's based on the FACE
418 vector<_Simplex> _simplices;
419 vector<_LayerEdge*> _neibors; // all surrounding _LayerEdge's
420 PSmooFun _smooFunction; // smoothing function
421 _Curvature* _curvature;
422 // data for smoothing of _LayerEdge's based on the EDGE
423 _2NearEdges* _2neibors;
425 enum EFlags { TO_SMOOTH = 1,
426 MOVED = 2, // set by _neibors[i]->SetNewLength()
427 SMOOTHED = 4, // set by this->Smooth()
428 DIFFICULT = 8, // near concave VERTEX
429 ON_CONCAVE_FACE = 16,
430 BLOCKED = 32, // not to inflate any more
431 INTERSECTED = 64, // close intersection with a face found
432 NORMAL_UPDATED = 128,
433 MARKED = 256, // local usage
434 MULTI_NORMAL = 512, // a normal is invisible by some of surrounding faces
435 NEAR_BOUNDARY = 1024,// is near FACE boundary forcing smooth
436 SMOOTHED_C1 = 2048,// is on _eosC1
437 DISTORTED = 4096,// was bad before smoothing
438 RISKY_SWOL = 8192 // SWOL is parallel to a source FACE
440 bool Is ( EFlags f ) const { return _flags & f; }
441 void Set ( EFlags f ) { _flags |= f; }
442 void Unset( EFlags f ) { _flags &= ~f; }
444 void SetNewLength( double len, _EdgesOnShape& eos, SMESH_MesherHelper& helper );
445 bool SetNewLength2d( Handle(Geom_Surface)& surface,
446 const TopoDS_Face& F,
448 SMESH_MesherHelper& helper );
449 void SetDataByNeighbors( const SMDS_MeshNode* n1,
450 const SMDS_MeshNode* n2,
451 const _EdgesOnShape& eos,
452 SMESH_MesherHelper& helper);
453 void Block( _SolidData& data );
454 void InvalidateStep( size_t curStep, const _EdgesOnShape& eos, bool restoreLength=false );
455 void ChooseSmooFunction(const set< TGeomID >& concaveVertices,
456 const TNode2Edge& n2eMap);
457 void SmoothPos( const vector< double >& segLen, const double tol );
458 int Smooth(const int step, const bool isConcaveFace, bool findBest);
459 int Smooth(const int step, bool findBest, vector< _LayerEdge* >& toSmooth );
460 int CheckNeiborsOnBoundary(vector< _LayerEdge* >* badNeibors = 0, bool * needSmooth = 0 );
461 void SmoothWoCheck();
462 bool SmoothOnEdge(Handle(ShapeAnalysis_Surface)& surface,
463 const TopoDS_Face& F,
464 SMESH_MesherHelper& helper);
465 void MoveNearConcaVer( const _EdgesOnShape* eov,
466 const _EdgesOnShape* eos,
468 vector< _LayerEdge* > & badSmooEdges);
469 bool FindIntersection( SMESH_ElementSearcher& searcher,
471 const double& epsilon,
473 const SMDS_MeshElement** face = 0);
474 bool SegTriaInter( const gp_Ax1& lastSegment,
479 const double& epsilon) const;
480 bool SegTriaInter( const gp_Ax1& lastSegment,
481 const SMDS_MeshNode* n0,
482 const SMDS_MeshNode* n1,
483 const SMDS_MeshNode* n2,
485 const double& epsilon) const
486 { return SegTriaInter( lastSegment,
487 SMESH_TNodeXYZ( n0 ), SMESH_TNodeXYZ( n1 ), SMESH_TNodeXYZ( n2 ),
490 const gp_XYZ& PrevPos() const { return _pos[ _pos.size() - 2 ]; }
491 const gp_XYZ& PrevCheckPos() const { return _pos[ Is( NORMAL_UPDATED ) ? _pos.size()-2 : 0 ]; }
492 gp_Ax1 LastSegment(double& segLen, _EdgesOnShape& eos) const;
493 gp_XY LastUV( const TopoDS_Face& F, _EdgesOnShape& eos ) const;
494 bool IsOnEdge() const { return _2neibors; }
495 gp_XYZ Copy( _LayerEdge& other, _EdgesOnShape& eos, SMESH_MesherHelper& helper );
496 void SetCosin( double cosin );
497 void SetNormal( const gp_XYZ& n ) { _normal = n; }
498 int NbSteps() const { return _pos.size() - 1; } // nb inlation steps
499 bool IsNeiborOnEdge( const _LayerEdge* edge ) const;
500 void SetSmooLen( double len ) { // set _len at which smoothing is needed
501 _cosin = len; // as for _LayerEdge's on FACE _cosin is not used
503 double GetSmooLen() { return _cosin; } // for _LayerEdge's on FACE _cosin is not used
505 gp_XYZ smoothLaplacian();
506 gp_XYZ smoothAngular();
507 gp_XYZ smoothLengthWeighted();
508 gp_XYZ smoothCentroidal();
509 gp_XYZ smoothNefPolygon();
511 enum { FUN_LAPLACIAN, FUN_LENWEIGHTED, FUN_CENTROIDAL, FUN_NEFPOLY, FUN_ANGULAR, FUN_NB };
512 static const int theNbSmooFuns = FUN_NB;
513 static PSmooFun _funs[theNbSmooFuns];
514 static const char* _funNames[theNbSmooFuns+1];
515 int smooFunID( PSmooFun fun=0) const;
517 _LayerEdge::PSmooFun _LayerEdge::_funs[theNbSmooFuns] = { &_LayerEdge::smoothLaplacian,
518 &_LayerEdge::smoothLengthWeighted,
519 &_LayerEdge::smoothCentroidal,
520 &_LayerEdge::smoothNefPolygon,
521 &_LayerEdge::smoothAngular };
522 const char* _LayerEdge::_funNames[theNbSmooFuns+1] = { "Laplacian",
530 bool operator () (const _LayerEdge* e1, const _LayerEdge* e2) const
532 const bool cmpNodes = ( e1 && e2 && e1->_nodes.size() && e2->_nodes.size() );
533 return cmpNodes ? ( e1->_nodes[0]->GetID() < e2->_nodes[0]->GetID()) : ( e1 < e2 );
536 //--------------------------------------------------------------------------------
538 * A 2D half plane used by _LayerEdge::smoothNefPolygon()
542 gp_XY _pos, _dir, _inNorm;
543 bool IsOut( const gp_XY p, const double tol ) const
545 return _inNorm * ( p - _pos ) < -tol;
547 bool FindIntersection( const _halfPlane& hp, gp_XY & intPnt )
549 //const double eps = 1e-10;
550 double D = _dir.Crossed( hp._dir );
551 if ( fabs(D) < std::numeric_limits<double>::min())
553 gp_XY vec21 = _pos - hp._pos;
554 double u = hp._dir.Crossed( vec21 ) / D;
555 intPnt = _pos + _dir * u;
559 //--------------------------------------------------------------------------------
561 * Structure used to smooth a _LayerEdge based on an EDGE.
565 double _wgt [2]; // weights of _nodes
566 _LayerEdge* _edges[2];
568 // normal to plane passing through _LayerEdge._normal and tangent of EDGE
571 _2NearEdges() { _edges[0]=_edges[1]=0; _plnNorm = 0; }
572 const SMDS_MeshNode* tgtNode(bool is2nd) {
573 return _edges[is2nd] ? _edges[is2nd]->_nodes.back() : 0;
575 const SMDS_MeshNode* srcNode(bool is2nd) {
576 return _edges[is2nd] ? _edges[is2nd]->_nodes[0] : 0;
579 std::swap( _wgt [0], _wgt [1] );
580 std::swap( _edges[0], _edges[1] );
582 void set( _LayerEdge* e1, _LayerEdge* e2, double w1, double w2 ) {
583 _edges[0] = e1; _edges[1] = e2; _wgt[0] = w1; _wgt[1] = w2;
585 bool include( const _LayerEdge* e ) {
586 return ( _edges[0] == e || _edges[1] == e );
591 //--------------------------------------------------------------------------------
593 * \brief Layers parameters got by averaging several hypotheses
597 AverageHyp( const StdMeshers_ViscousLayers* hyp = 0 )
598 :_nbLayers(0), _nbHyps(0), _method(0), _thickness(0), _stretchFactor(0)
602 void Add( const StdMeshers_ViscousLayers* hyp )
607 _nbLayers = hyp->GetNumberLayers();
608 //_thickness += hyp->GetTotalThickness();
609 _thickness = Max( _thickness, hyp->GetTotalThickness() );
610 _stretchFactor += hyp->GetStretchFactor();
611 _method = hyp->GetMethod();
614 double GetTotalThickness() const { return _thickness; /*_nbHyps ? _thickness / _nbHyps : 0;*/ }
615 double GetStretchFactor() const { return _nbHyps ? _stretchFactor / _nbHyps : 0; }
616 int GetNumberLayers() const { return _nbLayers; }
617 int GetMethod() const { return _method; }
619 bool UseSurfaceNormal() const
620 { return _method == StdMeshers_ViscousLayers::SURF_OFFSET_SMOOTH; }
621 bool ToSmooth() const
622 { return _method == StdMeshers_ViscousLayers::SURF_OFFSET_SMOOTH; }
623 bool IsOffsetMethod() const
624 { return _method == StdMeshers_ViscousLayers::FACE_OFFSET; }
627 int _nbLayers, _nbHyps, _method;
628 double _thickness, _stretchFactor;
631 //--------------------------------------------------------------------------------
633 * \brief _LayerEdge's on a shape and other shape data
637 vector< _LayerEdge* > _edges;
641 SMESH_subMesh * _subMesh;
642 // face or edge w/o layer along or near which _edges are inflated
644 bool _isRegularSWOL; // w/o singularities
645 // averaged StdMeshers_ViscousLayers parameters
648 _Smoother1D* _edgeSmoother;
649 vector< _EdgesOnShape* > _eosConcaVer; // edges at concave VERTEXes of a FACE
650 vector< _EdgesOnShape* > _eosC1; // to smooth together several C1 continues shapes
652 vector< gp_XYZ > _faceNormals; // if _shape is FACE
653 vector< _EdgesOnShape* > _faceEOS; // to get _faceNormals of adjacent FACEs
655 Handle(ShapeAnalysis_Surface) _offsetSurf;
656 _LayerEdge* _edgeForOffset;
658 _SolidData* _data; // parent SOLID
660 TopAbs_ShapeEnum ShapeType() const
661 { return _shape.IsNull() ? TopAbs_SHAPE : _shape.ShapeType(); }
662 TopAbs_ShapeEnum SWOLType() const
663 { return _sWOL.IsNull() ? TopAbs_SHAPE : _sWOL.ShapeType(); }
664 bool HasC1( const _EdgesOnShape* other ) const
665 { return std::find( _eosC1.begin(), _eosC1.end(), other ) != _eosC1.end(); }
666 bool GetNormal( const SMDS_MeshElement* face, gp_Vec& norm );
667 _SolidData& GetData() const { return *_data; }
669 _EdgesOnShape(): _shapeID(-1), _subMesh(0), _toSmooth(false), _edgeSmoother(0) {}
672 //--------------------------------------------------------------------------------
674 * \brief Convex FACE whose radius of curvature is less than the thickness of
675 * layers. It is used to detect distortion of prisms based on a convex
676 * FACE and to update normals to enable further increasing the thickness
682 // edges whose _simplices are used to detect prism distortion
683 vector< _LayerEdge* > _simplexTestEdges;
685 // map a sub-shape to _SolidData::_edgesOnShape
686 map< TGeomID, _EdgesOnShape* > _subIdToEOS;
690 bool GetCenterOfCurvature( _LayerEdge* ledge,
691 BRepLProp_SLProps& surfProp,
692 SMESH_MesherHelper& helper,
693 gp_Pnt & center ) const;
694 bool CheckPrisms() const;
697 //--------------------------------------------------------------------------------
699 * \brief Structure holding _LayerEdge's based on EDGEs that will collide
700 * at inflation up to the full thickness. A detected collision
701 * is fixed in updateNormals()
703 struct _CollisionEdges
706 vector< _LayerEdge* > _intEdges; // each pair forms an intersected quadrangle
707 const SMDS_MeshNode* nSrc(int i) const { return _intEdges[i]->_nodes[0]; }
708 const SMDS_MeshNode* nTgt(int i) const { return _intEdges[i]->_nodes.back(); }
711 //--------------------------------------------------------------------------------
713 * \brief Data of a SOLID
717 typedef const StdMeshers_ViscousLayers* THyp;
719 TGeomID _index; // SOLID id
720 _MeshOfSolid* _proxyMesh;
722 list< TopoDS_Shape > _hypShapes;
723 map< TGeomID, THyp > _face2hyp; // filled if _hyps.size() > 1
724 set< TGeomID > _reversedFaceIds;
725 set< TGeomID > _ignoreFaceIds; // WOL FACEs and FACEs of other SOLIDs
727 double _stepSize, _stepSizeCoeff, _geomSize;
728 const SMDS_MeshNode* _stepSizeNodes[2];
730 TNode2Edge _n2eMap; // nodes and _LayerEdge's based on them
732 // map to find _n2eMap of another _SolidData by a shrink shape shared by two _SolidData's
733 map< TGeomID, TNode2Edge* > _s2neMap;
734 // _LayerEdge's with underlying shapes
735 vector< _EdgesOnShape > _edgesOnShape;
737 // key: an id of shape (EDGE or VERTEX) shared by a FACE with
738 // layers and a FACE w/o layers
739 // value: the shape (FACE or EDGE) to shrink mesh on.
740 // _LayerEdge's basing on nodes on key shape are inflated along the value shape
741 map< TGeomID, TopoDS_Shape > _shrinkShape2Shape;
743 // Convex FACEs whose radius of curvature is less than the thickness of layers
744 map< TGeomID, _ConvexFace > _convexFaces;
746 // shapes (EDGEs and VERTEXes) srink from which is forbidden due to collisions with
747 // the adjacent SOLID
748 set< TGeomID > _noShrinkShapes;
750 int _nbShapesToSmooth;
752 //map< TGeomID,Handle(Geom_Curve)> _edge2curve;
754 vector< _CollisionEdges > _collisionEdges;
755 set< TGeomID > _concaveFaces;
757 double _maxThickness; // of all _hyps
758 double _minThickness; // of all _hyps
760 double _epsilon; // precision for SegTriaInter()
762 SMESH_MesherHelper* _helper;
764 _SolidData(const TopoDS_Shape& s=TopoDS_Shape(),
766 :_solid(s), _proxyMesh(m), _helper(0) {}
769 void SortOnEdge( const TopoDS_Edge& E, vector< _LayerEdge* >& edges);
770 void Sort2NeiborsOnEdge( vector< _LayerEdge* >& edges );
772 _ConvexFace* GetConvexFace( const TGeomID faceID ) {
773 map< TGeomID, _ConvexFace >::iterator id2face = _convexFaces.find( faceID );
774 return id2face == _convexFaces.end() ? 0 : & id2face->second;
776 _EdgesOnShape* GetShapeEdges(const TGeomID shapeID );
777 _EdgesOnShape* GetShapeEdges(const TopoDS_Shape& shape );
778 _EdgesOnShape* GetShapeEdges(const _LayerEdge* edge )
779 { return GetShapeEdges( edge->_nodes[0]->getshapeId() ); }
781 SMESH_MesherHelper& GetHelper() const { return *_helper; }
784 for ( size_t i = 0; i < _edgesOnShape.size(); ++i )
785 for ( size_t j = 0; j < _edgesOnShape[i]._edges.size(); ++j )
786 _edgesOnShape[i]._edges[j]->Unset( _LayerEdge::MARKED );
788 void AddShapesToSmooth( const set< _EdgesOnShape* >& shape,
789 const set< _EdgesOnShape* >* edgesNoAnaSmooth=0 );
791 void PrepareEdgesToSmoothOnFace( _EdgesOnShape* eof, bool substituteSrcNodes );
793 //--------------------------------------------------------------------------------
795 * \brief Offset plane used in getNormalByOffset()
801 int _faceIndexNext[2];
802 gp_Lin _lines[2]; // line of intersection with neighbor _OffsetPlane's
805 _isLineOK[0] = _isLineOK[1] = false; _faceIndexNext[0] = _faceIndexNext[1] = -1;
807 void ComputeIntersectionLine( _OffsetPlane& pln );
808 gp_XYZ GetCommonPoint(bool& isFound) const;
809 int NbLines() const { return _isLineOK[0] + _isLineOK[1]; }
811 //--------------------------------------------------------------------------------
813 * \brief Container of centers of curvature at nodes on an EDGE bounding _ConvexFace
815 struct _CentralCurveOnEdge
818 vector< gp_Pnt > _curvaCenters;
819 vector< _LayerEdge* > _ledges;
820 vector< gp_XYZ > _normals; // new normal for each of _ledges
821 vector< double > _segLength2;
824 TopoDS_Face _adjFace;
825 bool _adjFaceToSmooth;
827 void Append( const gp_Pnt& center, _LayerEdge* ledge )
829 if ( _curvaCenters.size() > 0 )
830 _segLength2.push_back( center.SquareDistance( _curvaCenters.back() ));
831 _curvaCenters.push_back( center );
832 _ledges.push_back( ledge );
833 _normals.push_back( ledge->_normal );
835 bool FindNewNormal( const gp_Pnt& center, gp_XYZ& newNormal );
836 void SetShapes( const TopoDS_Edge& edge,
837 const _ConvexFace& convFace,
839 SMESH_MesherHelper& helper);
841 //--------------------------------------------------------------------------------
843 * \brief Data of node on a shrinked FACE
847 const SMDS_MeshNode* _node;
848 vector<_Simplex> _simplices; // for quality check
850 enum SmoothType { LAPLACIAN, CENTROIDAL, ANGULAR, TFI };
852 bool Smooth(int& badNb,
853 Handle(Geom_Surface)& surface,
854 SMESH_MesherHelper& helper,
855 const double refSign,
859 gp_XY computeAngularPos(vector<gp_XY>& uv,
860 const gp_XY& uvToFix,
861 const double refSign );
863 //--------------------------------------------------------------------------------
865 * \brief Builder of viscous layers
867 class _ViscousBuilder
872 SMESH_ComputeErrorPtr Compute(SMESH_Mesh& mesh,
873 const TopoDS_Shape& shape);
874 // check validity of hypotheses
875 SMESH_ComputeErrorPtr CheckHypotheses( SMESH_Mesh& mesh,
876 const TopoDS_Shape& shape );
878 // restore event listeners used to clear an inferior dim sub-mesh modified by viscous layers
879 void RestoreListeners();
881 // computes SMESH_ProxyMesh::SubMesh::_n2n;
882 bool MakeN2NMap( _MeshOfSolid* pm );
886 bool findSolidsWithLayers();
887 bool findFacesWithLayers(const bool onlyWith=false);
888 void getIgnoreFaces(const TopoDS_Shape& solid,
889 const StdMeshers_ViscousLayers* hyp,
890 const TopoDS_Shape& hypShape,
891 set<TGeomID>& ignoreFaces);
892 bool makeLayer(_SolidData& data);
893 void setShapeData( _EdgesOnShape& eos, SMESH_subMesh* sm, _SolidData& data );
894 bool setEdgeData( _LayerEdge& edge, _EdgesOnShape& eos,
895 SMESH_MesherHelper& helper, _SolidData& data);
896 gp_XYZ getFaceNormal(const SMDS_MeshNode* n,
897 const TopoDS_Face& face,
898 SMESH_MesherHelper& helper,
900 bool shiftInside=false);
901 bool getFaceNormalAtSingularity(const gp_XY& uv,
902 const TopoDS_Face& face,
903 SMESH_MesherHelper& helper,
905 gp_XYZ getWeigthedNormal( const _LayerEdge* edge );
906 gp_XYZ getNormalByOffset( _LayerEdge* edge,
907 std::pair< TopoDS_Face, gp_XYZ > fId2Normal[],
909 bool findNeiborsOnEdge(const _LayerEdge* edge,
910 const SMDS_MeshNode*& n1,
911 const SMDS_MeshNode*& n2,
914 void findSimplexTestEdges( _SolidData& data,
915 vector< vector<_LayerEdge*> >& edgesByGeom);
916 void computeGeomSize( _SolidData& data );
917 bool findShapesToSmooth( _SolidData& data);
918 void limitStepSizeByCurvature( _SolidData& data );
919 void limitStepSize( _SolidData& data,
920 const SMDS_MeshElement* face,
921 const _LayerEdge* maxCosinEdge );
922 void limitStepSize( _SolidData& data, const double minSize);
923 bool inflate(_SolidData& data);
924 bool smoothAndCheck(_SolidData& data, const int nbSteps, double & distToIntersection);
925 int invalidateBadSmooth( _SolidData& data,
926 SMESH_MesherHelper& helper,
927 vector< _LayerEdge* >& badSmooEdges,
928 vector< _EdgesOnShape* >& eosC1,
930 void makeOffsetSurface( _EdgesOnShape& eos, SMESH_MesherHelper& );
931 void putOnOffsetSurface( _EdgesOnShape& eos, int infStep, int smooStep=0, bool moveAll=false );
932 void findCollisionEdges( _SolidData& data, SMESH_MesherHelper& helper );
933 bool updateNormals( _SolidData& data, SMESH_MesherHelper& helper, int stepNb, double stepSize );
934 bool updateNormalsOfConvexFaces( _SolidData& data,
935 SMESH_MesherHelper& helper,
937 void updateNormalsOfC1Vertices( _SolidData& data );
938 bool updateNormalsOfSmoothed( _SolidData& data,
939 SMESH_MesherHelper& helper,
941 const double stepSize );
942 bool isNewNormalOk( _SolidData& data,
944 const gp_XYZ& newNormal);
945 bool refine(_SolidData& data);
947 bool prepareEdgeToShrink( _LayerEdge& edge, _EdgesOnShape& eos,
948 SMESH_MesherHelper& helper,
949 const SMESHDS_SubMesh* faceSubMesh );
950 void restoreNoShrink( _LayerEdge& edge ) const;
951 void fixBadFaces(const TopoDS_Face& F,
952 SMESH_MesherHelper& helper,
955 set<const SMDS_MeshNode*> * involvedNodes=NULL);
956 bool addBoundaryElements();
958 bool error( const string& text, int solidID=-1 );
959 SMESHDS_Mesh* getMeshDS() const { return _mesh->GetMeshDS(); }
962 void makeGroupOfLE();
965 SMESH_ComputeErrorPtr _error;
967 vector< _SolidData > _sdVec;
970 //--------------------------------------------------------------------------------
972 * \brief Shrinker of nodes on the EDGE
976 TopoDS_Edge _geomEdge;
977 vector<double> _initU;
978 vector<double> _normPar;
979 vector<const SMDS_MeshNode*> _nodes;
980 const _LayerEdge* _edges[2];
983 void AddEdge( const _LayerEdge* e, _EdgesOnShape& eos, SMESH_MesherHelper& helper );
984 void Compute(bool set3D, SMESH_MesherHelper& helper);
985 void RestoreParams();
986 void SwapSrcTgtNodes(SMESHDS_Mesh* mesh);
987 const TopoDS_Edge& GeomEdge() const { return _geomEdge; }
988 const SMDS_MeshNode* TgtNode( bool is2nd ) const
989 { return _edges[is2nd] ? _edges[is2nd]->_nodes.back() : 0; }
990 const SMDS_MeshNode* SrcNode( bool is2nd ) const
991 { return _edges[is2nd] ? _edges[is2nd]->_nodes[0] : 0; }
993 //--------------------------------------------------------------------------------
995 * \brief Smoother of _LayerEdge's on EDGE.
999 struct OffPnt // point of the offsetted EDGE
1001 gp_XYZ _xyz; // coord of a point inflated from EDGE w/o smooth
1002 double _len; // length reached at previous inflation step
1003 _2NearEdges _2edges; // 2 neighbor _LayerEdge's
1004 double Distance( const OffPnt& p ) const { return ( _xyz - p._xyz ).Modulus(); }
1006 vector< OffPnt > _offPoints;
1007 vector< double > _leParams; // normalized param of _eos._edges on EDGE
1008 Handle(Geom_Curve) _anaCurve; // for analytic smooth
1009 _LayerEdge _leOnV[2]; // _LayerEdge's holding normal to the EDGE at VERTEXes
1010 size_t _iSeg[2]; // index of segment where extreme tgt node is projected
1011 _EdgesOnShape& _eos;
1013 static Handle(Geom_Curve) CurveForSmooth( const TopoDS_Edge& E,
1015 SMESH_MesherHelper& helper);
1017 _Smoother1D( Handle(Geom_Curve) curveForSmooth,
1018 _EdgesOnShape& eos )
1019 : _anaCurve( curveForSmooth ), _eos( eos )
1022 bool Perform(_SolidData& data,
1023 Handle(ShapeAnalysis_Surface)& surface,
1024 const TopoDS_Face& F,
1025 SMESH_MesherHelper& helper )
1027 if ( _leParams.empty() || ( !isAnalytic() && _offPoints.empty() ))
1031 return smoothAnalyticEdge( data, surface, F, helper );
1033 return smoothComplexEdge ( data, surface, F, helper );
1035 void prepare(_SolidData& data );
1037 bool smoothAnalyticEdge( _SolidData& data,
1038 Handle(ShapeAnalysis_Surface)& surface,
1039 const TopoDS_Face& F,
1040 SMESH_MesherHelper& helper);
1042 bool smoothComplexEdge( _SolidData& data,
1043 Handle(ShapeAnalysis_Surface)& surface,
1044 const TopoDS_Face& F,
1045 SMESH_MesherHelper& helper);
1047 void setNormalOnV( const bool is2nd,
1048 SMESH_MesherHelper& helper);
1050 _LayerEdge* getLEdgeOnV( bool is2nd )
1052 return _eos._edges[ is2nd ? _eos._edges.size()-1 : 0 ]->_2neibors->_edges[ is2nd ];
1054 bool isAnalytic() const { return !_anaCurve.IsNull(); }
1056 //--------------------------------------------------------------------------------
1058 * \brief Class of temporary mesh face.
1059 * We can't use SMDS_FaceOfNodes since it's impossible to set it's ID which is
1060 * needed because SMESH_ElementSearcher internaly uses set of elements sorted by ID
1062 struct _TmpMeshFace : public SMDS_MeshElement
1064 vector<const SMDS_MeshNode* > _nn;
1065 _TmpMeshFace( const vector<const SMDS_MeshNode*>& nodes,
1066 int id, int faceID=-1, int idInFace=-1):
1067 SMDS_MeshElement(id), _nn(nodes) { setShapeId(faceID); setIdInShape(idInFace); }
1068 virtual const SMDS_MeshNode* GetNode(const int ind) const { return _nn[ind]; }
1069 virtual SMDSAbs_ElementType GetType() const { return SMDSAbs_Face; }
1070 virtual vtkIdType GetVtkType() const { return -1; }
1071 virtual SMDSAbs_EntityType GetEntityType() const { return SMDSEntity_Last; }
1072 virtual SMDSAbs_GeometryType GetGeomType() const
1073 { return _nn.size() == 3 ? SMDSGeom_TRIANGLE : SMDSGeom_QUADRANGLE; }
1074 virtual SMDS_ElemIteratorPtr elementsIterator(SMDSAbs_ElementType) const
1075 { return SMDS_ElemIteratorPtr( new SMDS_NodeVectorElemIterator( _nn.begin(), _nn.end()));}
1077 //--------------------------------------------------------------------------------
1079 * \brief Class of temporary mesh face storing _LayerEdge it's based on
1081 struct _TmpMeshFaceOnEdge : public _TmpMeshFace
1083 _LayerEdge *_le1, *_le2;
1084 _TmpMeshFaceOnEdge( _LayerEdge* le1, _LayerEdge* le2, int ID ):
1085 _TmpMeshFace( vector<const SMDS_MeshNode*>(4), ID ), _le1(le1), _le2(le2)
1087 _nn[0]=_le1->_nodes[0];
1088 _nn[1]=_le1->_nodes.back();
1089 _nn[2]=_le2->_nodes.back();
1090 _nn[3]=_le2->_nodes[0];
1092 gp_XYZ GetDir() const // return average direction of _LayerEdge's, normal to EDGE
1094 SMESH_TNodeXYZ p0s( _nn[0] );
1095 SMESH_TNodeXYZ p0t( _nn[1] );
1096 SMESH_TNodeXYZ p1t( _nn[2] );
1097 SMESH_TNodeXYZ p1s( _nn[3] );
1098 gp_XYZ v0 = p0t - p0s;
1099 gp_XYZ v1 = p1t - p1s;
1100 gp_XYZ v01 = p1s - p0s;
1101 gp_XYZ n = ( v0 ^ v01 ) + ( v1 ^ v01 );
1106 gp_XYZ GetDir(_LayerEdge* le1, _LayerEdge* le2) // return average direction of _LayerEdge's
1108 _nn[0]=le1->_nodes[0];
1109 _nn[1]=le1->_nodes.back();
1110 _nn[2]=le2->_nodes.back();
1111 _nn[3]=le2->_nodes[0];
1115 //--------------------------------------------------------------------------------
1117 * \brief Retriever of node coordinates either directly or from a surface by node UV.
1118 * \warning Location of a surface is ignored
1120 struct _NodeCoordHelper
1122 SMESH_MesherHelper& _helper;
1123 const TopoDS_Face& _face;
1124 Handle(Geom_Surface) _surface;
1125 gp_XYZ (_NodeCoordHelper::* _fun)(const SMDS_MeshNode* n) const;
1127 _NodeCoordHelper(const TopoDS_Face& F, SMESH_MesherHelper& helper, bool is2D)
1128 : _helper( helper ), _face( F )
1132 TopLoc_Location loc;
1133 _surface = BRep_Tool::Surface( _face, loc );
1135 if ( _surface.IsNull() )
1136 _fun = & _NodeCoordHelper::direct;
1138 _fun = & _NodeCoordHelper::byUV;
1140 gp_XYZ operator()(const SMDS_MeshNode* n) const { return (this->*_fun)( n ); }
1143 gp_XYZ direct(const SMDS_MeshNode* n) const
1145 return SMESH_TNodeXYZ( n );
1147 gp_XYZ byUV (const SMDS_MeshNode* n) const
1149 gp_XY uv = _helper.GetNodeUV( _face, n );
1150 return _surface->Value( uv.X(), uv.Y() ).XYZ();
1154 //================================================================================
1156 * \brief Check angle between vectors
1158 //================================================================================
1160 inline bool isLessAngle( const gp_Vec& v1, const gp_Vec& v2, const double cos )
1162 double dot = v1 * v2; // cos * |v1| * |v2|
1163 double l1 = v1.SquareMagnitude();
1164 double l2 = v2.SquareMagnitude();
1165 return (( dot * cos >= 0 ) &&
1166 ( dot * dot ) / l1 / l2 >= ( cos * cos ));
1169 } // namespace VISCOUS_3D
1173 //================================================================================
1174 // StdMeshers_ViscousLayers hypothesis
1176 StdMeshers_ViscousLayers::StdMeshers_ViscousLayers(int hypId, int studyId, SMESH_Gen* gen)
1177 :SMESH_Hypothesis(hypId, studyId, gen),
1178 _isToIgnoreShapes(1), _nbLayers(1), _thickness(1), _stretchFactor(1),
1179 _method( SURF_OFFSET_SMOOTH )
1181 _name = StdMeshers_ViscousLayers::GetHypType();
1182 _param_algo_dim = -3; // auxiliary hyp used by 3D algos
1183 } // --------------------------------------------------------------------------------
1184 void StdMeshers_ViscousLayers::SetBndShapes(const std::vector<int>& faceIds, bool toIgnore)
1186 if ( faceIds != _shapeIds )
1187 _shapeIds = faceIds, NotifySubMeshesHypothesisModification();
1188 if ( _isToIgnoreShapes != toIgnore )
1189 _isToIgnoreShapes = toIgnore, NotifySubMeshesHypothesisModification();
1190 } // --------------------------------------------------------------------------------
1191 void StdMeshers_ViscousLayers::SetTotalThickness(double thickness)
1193 if ( thickness != _thickness )
1194 _thickness = thickness, NotifySubMeshesHypothesisModification();
1195 } // --------------------------------------------------------------------------------
1196 void StdMeshers_ViscousLayers::SetNumberLayers(int nb)
1198 if ( _nbLayers != nb )
1199 _nbLayers = nb, NotifySubMeshesHypothesisModification();
1200 } // --------------------------------------------------------------------------------
1201 void StdMeshers_ViscousLayers::SetStretchFactor(double factor)
1203 if ( _stretchFactor != factor )
1204 _stretchFactor = factor, NotifySubMeshesHypothesisModification();
1205 } // --------------------------------------------------------------------------------
1206 void StdMeshers_ViscousLayers::SetMethod( ExtrusionMethod method )
1208 if ( _method != method )
1209 _method = method, NotifySubMeshesHypothesisModification();
1210 } // --------------------------------------------------------------------------------
1211 SMESH_ProxyMesh::Ptr
1212 StdMeshers_ViscousLayers::Compute(SMESH_Mesh& theMesh,
1213 const TopoDS_Shape& theShape,
1214 const bool toMakeN2NMap) const
1216 using namespace VISCOUS_3D;
1217 _ViscousBuilder bulder;
1218 SMESH_ComputeErrorPtr err = bulder.Compute( theMesh, theShape );
1219 if ( err && !err->IsOK() )
1220 return SMESH_ProxyMesh::Ptr();
1222 vector<SMESH_ProxyMesh::Ptr> components;
1223 TopExp_Explorer exp( theShape, TopAbs_SOLID );
1224 for ( ; exp.More(); exp.Next() )
1226 if ( _MeshOfSolid* pm =
1227 _ViscousListener::GetSolidMesh( &theMesh, exp.Current(), /*toCreate=*/false))
1229 if ( toMakeN2NMap && !pm->_n2nMapComputed )
1230 if ( !bulder.MakeN2NMap( pm ))
1231 return SMESH_ProxyMesh::Ptr();
1232 components.push_back( SMESH_ProxyMesh::Ptr( pm ));
1233 pm->myIsDeletable = false; // it will de deleted by boost::shared_ptr
1235 if ( pm->_warning && !pm->_warning->IsOK() )
1237 SMESH_subMesh* sm = theMesh.GetSubMesh( exp.Current() );
1238 SMESH_ComputeErrorPtr& smError = sm->GetComputeError();
1239 if ( !smError || smError->IsOK() )
1240 smError = pm->_warning;
1243 _ViscousListener::RemoveSolidMesh ( &theMesh, exp.Current() );
1245 switch ( components.size() )
1249 case 1: return components[0];
1251 default: return SMESH_ProxyMesh::Ptr( new SMESH_ProxyMesh( components ));
1253 return SMESH_ProxyMesh::Ptr();
1254 } // --------------------------------------------------------------------------------
1255 std::ostream & StdMeshers_ViscousLayers::SaveTo(std::ostream & save)
1257 save << " " << _nbLayers
1258 << " " << _thickness
1259 << " " << _stretchFactor
1260 << " " << _shapeIds.size();
1261 for ( size_t i = 0; i < _shapeIds.size(); ++i )
1262 save << " " << _shapeIds[i];
1263 save << " " << !_isToIgnoreShapes; // negate to keep the behavior in old studies.
1264 save << " " << _method;
1266 } // --------------------------------------------------------------------------------
1267 std::istream & StdMeshers_ViscousLayers::LoadFrom(std::istream & load)
1269 int nbFaces, faceID, shapeToTreat, method;
1270 load >> _nbLayers >> _thickness >> _stretchFactor >> nbFaces;
1271 while ( (int) _shapeIds.size() < nbFaces && load >> faceID )
1272 _shapeIds.push_back( faceID );
1273 if ( load >> shapeToTreat ) {
1274 _isToIgnoreShapes = !shapeToTreat;
1275 if ( load >> method )
1276 _method = (ExtrusionMethod) method;
1279 _isToIgnoreShapes = true; // old behavior
1282 } // --------------------------------------------------------------------------------
1283 bool StdMeshers_ViscousLayers::SetParametersByMesh(const SMESH_Mesh* theMesh,
1284 const TopoDS_Shape& theShape)
1288 } // --------------------------------------------------------------------------------
1289 SMESH_ComputeErrorPtr
1290 StdMeshers_ViscousLayers::CheckHypothesis(SMESH_Mesh& theMesh,
1291 const TopoDS_Shape& theShape,
1292 SMESH_Hypothesis::Hypothesis_Status& theStatus)
1294 VISCOUS_3D::_ViscousBuilder bulder;
1295 SMESH_ComputeErrorPtr err = bulder.CheckHypotheses( theMesh, theShape );
1296 if ( err && !err->IsOK() )
1297 theStatus = SMESH_Hypothesis::HYP_INCOMPAT_HYPS;
1299 theStatus = SMESH_Hypothesis::HYP_OK;
1303 // --------------------------------------------------------------------------------
1304 bool StdMeshers_ViscousLayers::IsShapeWithLayers(int shapeIndex) const
1307 ( std::find( _shapeIds.begin(), _shapeIds.end(), shapeIndex ) != _shapeIds.end() );
1308 return IsToIgnoreShapes() ? !isIn : isIn;
1310 // END StdMeshers_ViscousLayers hypothesis
1311 //================================================================================
1313 namespace VISCOUS_3D
1315 gp_XYZ getEdgeDir( const TopoDS_Edge& E, const TopoDS_Vertex& fromV )
1319 Handle(Geom_Curve) c = BRep_Tool::Curve( E, f, l );
1320 if ( c.IsNull() ) return gp_XYZ( Precision::Infinite(), 1e100, 1e100 );
1321 gp_Pnt p = BRep_Tool::Pnt( fromV );
1322 double distF = p.SquareDistance( c->Value( f ));
1323 double distL = p.SquareDistance( c->Value( l ));
1324 c->D1(( distF < distL ? f : l), p, dir );
1325 if ( distL < distF ) dir.Reverse();
1328 //--------------------------------------------------------------------------------
1329 gp_XYZ getEdgeDir( const TopoDS_Edge& E, const SMDS_MeshNode* atNode,
1330 SMESH_MesherHelper& helper)
1333 double f,l; gp_Pnt p;
1334 Handle(Geom_Curve) c = BRep_Tool::Curve( E, f, l );
1335 if ( c.IsNull() ) return gp_XYZ( Precision::Infinite(), 1e100, 1e100 );
1336 double u = helper.GetNodeU( E, atNode );
1340 //--------------------------------------------------------------------------------
1341 gp_XYZ getFaceDir( const TopoDS_Face& F, const TopoDS_Vertex& fromV,
1342 const SMDS_MeshNode* node, SMESH_MesherHelper& helper, bool& ok,
1344 //--------------------------------------------------------------------------------
1345 gp_XYZ getFaceDir( const TopoDS_Face& F, const TopoDS_Edge& fromE,
1346 const SMDS_MeshNode* node, SMESH_MesherHelper& helper, bool& ok)
1349 Handle(Geom_Curve) c = BRep_Tool::Curve( fromE, f, l );
1352 TopoDS_Vertex v = helper.IthVertex( 0, fromE );
1353 return getFaceDir( F, v, node, helper, ok );
1355 gp_XY uv = helper.GetNodeUV( F, node, 0, &ok );
1356 Handle(Geom_Surface) surface = BRep_Tool::Surface( F );
1357 gp_Pnt p; gp_Vec du, dv, norm;
1358 surface->D1( uv.X(),uv.Y(), p, du,dv );
1361 double u = helper.GetNodeU( fromE, node, 0, &ok );
1363 TopAbs_Orientation o = helper.GetSubShapeOri( F.Oriented(TopAbs_FORWARD), fromE);
1364 if ( o == TopAbs_REVERSED )
1367 gp_Vec dir = norm ^ du;
1369 if ( node->GetPosition()->GetTypeOfPosition() == SMDS_TOP_VERTEX &&
1370 helper.IsClosedEdge( fromE ))
1372 if ( fabs(u-f) < fabs(u-l)) c->D1( l, p, dv );
1373 else c->D1( f, p, dv );
1374 if ( o == TopAbs_REVERSED )
1376 gp_Vec dir2 = norm ^ dv;
1377 dir = dir.Normalized() + dir2.Normalized();
1381 //--------------------------------------------------------------------------------
1382 gp_XYZ getFaceDir( const TopoDS_Face& F, const TopoDS_Vertex& fromV,
1383 const SMDS_MeshNode* node, SMESH_MesherHelper& helper,
1384 bool& ok, double* cosin)
1386 TopoDS_Face faceFrw = F;
1387 faceFrw.Orientation( TopAbs_FORWARD );
1388 //double f,l; TopLoc_Location loc;
1389 TopoDS_Edge edges[2]; // sharing a vertex
1392 TopoDS_Vertex VV[2];
1393 TopExp_Explorer exp( faceFrw, TopAbs_EDGE );
1394 for ( ; exp.More() && nbEdges < 2; exp.Next() )
1396 const TopoDS_Edge& e = TopoDS::Edge( exp.Current() );
1397 if ( SMESH_Algo::isDegenerated( e )) continue;
1398 TopExp::Vertices( e, VV[0], VV[1], /*CumOri=*/true );
1399 if ( VV[1].IsSame( fromV )) {
1400 nbEdges += edges[ 0 ].IsNull();
1403 else if ( VV[0].IsSame( fromV )) {
1404 nbEdges += edges[ 1 ].IsNull();
1409 gp_XYZ dir(0,0,0), edgeDir[2];
1412 // get dirs of edges going fromV
1414 for ( size_t i = 0; i < nbEdges && ok; ++i )
1416 edgeDir[i] = getEdgeDir( edges[i], fromV );
1417 double size2 = edgeDir[i].SquareModulus();
1418 if (( ok = size2 > numeric_limits<double>::min() ))
1419 edgeDir[i] /= sqrt( size2 );
1421 if ( !ok ) return dir;
1423 // get angle between the 2 edges
1425 double angle = helper.GetAngle( edges[0], edges[1], faceFrw, fromV, &faceNormal );
1426 if ( Abs( angle ) < 5 * M_PI/180 )
1428 dir = ( faceNormal.XYZ() ^ edgeDir[0].Reversed()) + ( faceNormal.XYZ() ^ edgeDir[1] );
1432 dir = edgeDir[0] + edgeDir[1];
1437 double angle = gp_Vec( edgeDir[0] ).Angle( dir );
1438 *cosin = Cos( angle );
1441 else if ( nbEdges == 1 )
1443 dir = getFaceDir( faceFrw, edges[ edges[0].IsNull() ], node, helper, ok );
1444 if ( cosin ) *cosin = 1.;
1454 //================================================================================
1456 * \brief Finds concave VERTEXes of a FACE
1458 //================================================================================
1460 bool getConcaveVertices( const TopoDS_Face& F,
1461 SMESH_MesherHelper& helper,
1462 set< TGeomID >* vertices = 0)
1464 // check angles at VERTEXes
1466 TSideVector wires = StdMeshers_FaceSide::GetFaceWires( F, *helper.GetMesh(), 0, error );
1467 for ( size_t iW = 0; iW < wires.size(); ++iW )
1469 const int nbEdges = wires[iW]->NbEdges();
1470 if ( nbEdges < 2 && SMESH_Algo::isDegenerated( wires[iW]->Edge(0)))
1472 for ( int iE1 = 0; iE1 < nbEdges; ++iE1 )
1474 if ( SMESH_Algo::isDegenerated( wires[iW]->Edge( iE1 ))) continue;
1475 int iE2 = ( iE1 + 1 ) % nbEdges;
1476 while ( SMESH_Algo::isDegenerated( wires[iW]->Edge( iE2 )))
1477 iE2 = ( iE2 + 1 ) % nbEdges;
1478 TopoDS_Vertex V = wires[iW]->FirstVertex( iE2 );
1479 double angle = helper.GetAngle( wires[iW]->Edge( iE1 ),
1480 wires[iW]->Edge( iE2 ), F, V );
1481 if ( angle < -5. * M_PI / 180. )
1485 vertices->insert( helper.GetMeshDS()->ShapeToIndex( V ));
1489 return vertices ? !vertices->empty() : false;
1492 //================================================================================
1494 * \brief Returns true if a FACE is bound by a concave EDGE
1496 //================================================================================
1498 bool isConcave( const TopoDS_Face& F,
1499 SMESH_MesherHelper& helper,
1500 set< TGeomID >* vertices = 0 )
1502 bool isConcv = false;
1503 // if ( helper.Count( F, TopAbs_WIRE, /*useMap=*/false) > 1 )
1505 gp_Vec2d drv1, drv2;
1507 TopExp_Explorer eExp( F.Oriented( TopAbs_FORWARD ), TopAbs_EDGE );
1508 for ( ; eExp.More(); eExp.Next() )
1510 const TopoDS_Edge& E = TopoDS::Edge( eExp.Current() );
1511 if ( SMESH_Algo::isDegenerated( E )) continue;
1512 // check if 2D curve is concave
1513 BRepAdaptor_Curve2d curve( E, F );
1514 const int nbIntervals = curve.NbIntervals( GeomAbs_C2 );
1515 TColStd_Array1OfReal intervals(1, nbIntervals + 1 );
1516 curve.Intervals( intervals, GeomAbs_C2 );
1517 bool isConvex = true;
1518 for ( int i = 1; i <= nbIntervals && isConvex; ++i )
1520 double u1 = intervals( i );
1521 double u2 = intervals( i+1 );
1522 curve.D2( 0.5*( u1+u2 ), p, drv1, drv2 );
1523 double cross = drv1 ^ drv2;
1524 if ( E.Orientation() == TopAbs_REVERSED )
1526 isConvex = ( cross > -1e-9 ); // 0.1 );
1530 //cout << "Concave FACE " << helper.GetMeshDS()->ShapeToIndex( F ) << endl;
1539 // check angles at VERTEXes
1540 if ( getConcaveVertices( F, helper, vertices ))
1546 //================================================================================
1548 * \brief Computes mimimal distance of face in-FACE nodes from an EDGE
1549 * \param [in] face - the mesh face to treat
1550 * \param [in] nodeOnEdge - a node on the EDGE
1551 * \param [out] faceSize - the computed distance
1552 * \return bool - true if faceSize computed
1554 //================================================================================
1556 bool getDistFromEdge( const SMDS_MeshElement* face,
1557 const SMDS_MeshNode* nodeOnEdge,
1560 faceSize = Precision::Infinite();
1563 int nbN = face->NbCornerNodes();
1564 int iOnE = face->GetNodeIndex( nodeOnEdge );
1565 int iNext[2] = { SMESH_MesherHelper::WrapIndex( iOnE+1, nbN ),
1566 SMESH_MesherHelper::WrapIndex( iOnE-1, nbN ) };
1567 const SMDS_MeshNode* nNext[2] = { face->GetNode( iNext[0] ),
1568 face->GetNode( iNext[1] ) };
1569 gp_XYZ segVec, segEnd = SMESH_TNodeXYZ( nodeOnEdge ); // segment on EDGE
1570 double segLen = -1.;
1571 // look for two neighbor not in-FACE nodes of face
1572 for ( int i = 0; i < 2; ++i )
1574 if ( nNext[i]->GetPosition()->GetDim() != 2 &&
1575 nNext[i]->GetID() < nodeOnEdge->GetID() )
1577 // look for an in-FACE node
1578 for ( int iN = 0; iN < nbN; ++iN )
1580 if ( iN == iOnE || iN == iNext[i] )
1582 SMESH_TNodeXYZ pInFace = face->GetNode( iN );
1583 gp_XYZ v = pInFace - segEnd;
1586 segVec = SMESH_TNodeXYZ( nNext[i] ) - segEnd;
1587 segLen = segVec.Modulus();
1589 double distToSeg = v.Crossed( segVec ).Modulus() / segLen;
1590 faceSize = Min( faceSize, distToSeg );
1598 //================================================================================
1600 * \brief Return direction of axis or revolution of a surface
1602 //================================================================================
1604 bool getRovolutionAxis( const Adaptor3d_Surface& surface,
1607 switch ( surface.GetType() ) {
1610 gp_Cone cone = surface.Cone();
1611 axis = cone.Axis().Direction();
1614 case GeomAbs_Sphere:
1616 gp_Sphere sphere = surface.Sphere();
1617 axis = sphere.Position().Direction();
1620 case GeomAbs_SurfaceOfRevolution:
1622 axis = surface.AxeOfRevolution().Direction();
1625 //case GeomAbs_SurfaceOfExtrusion:
1626 case GeomAbs_OffsetSurface:
1628 Handle(Adaptor3d_HSurface) base = surface.BasisSurface();
1629 return getRovolutionAxis( base->Surface(), axis );
1631 default: return false;
1636 //--------------------------------------------------------------------------------
1637 // DEBUG. Dump intermediate node positions into a python script
1638 // HOWTO use: run python commands written in a console to see
1639 // construction steps of viscous layers
1644 PyDump(SMESH_Mesh& m) {
1645 int tag = 3 + m.GetId();
1646 const char* fname = "/tmp/viscous.py";
1647 cout << "execfile('"<<fname<<"')"<<endl;
1648 py = new ofstream(fname);
1649 *py << "import SMESH" << endl
1650 << "from salome.smesh import smeshBuilder" << endl
1651 << "smesh = smeshBuilder.New(salome.myStudy)" << endl
1652 << "meshSO = smesh.GetCurrentStudy().FindObjectID('0:1:2:" << tag <<"')" << endl
1653 << "mesh = smesh.Mesh( meshSO.GetObject() )"<<endl;
1658 *py << "mesh.GroupOnFilter(SMESH.VOLUME,'Viscous Prisms',"
1659 "smesh.GetFilter(SMESH.VOLUME,SMESH.FT_ElemGeomType,'=',SMESH.Geom_PENTA))"<<endl;
1660 *py << "mesh.GroupOnFilter(SMESH.VOLUME,'Neg Volumes',"
1661 "smesh.GetFilter(SMESH.VOLUME,SMESH.FT_Volume3D,'<',0))"<<endl;
1665 ~PyDump() { Finish(); cout << "NB FUNCTIONS: " << theNbPyFunc << endl; }
1667 #define dumpFunction(f) { _dumpFunction(f, __LINE__);}
1668 #define dumpMove(n) { _dumpMove(n, __LINE__);}
1669 #define dumpMoveComm(n,txt) { _dumpMove(n, __LINE__, txt);}
1670 #define dumpCmd(txt) { _dumpCmd(txt, __LINE__);}
1671 void _dumpFunction(const string& fun, int ln)
1672 { if (py) *py<< "def "<<fun<<"(): # "<< ln <<endl; cout<<fun<<"()"<<endl; ++theNbPyFunc; }
1673 void _dumpMove(const SMDS_MeshNode* n, int ln, const char* txt="")
1674 { if (py) *py<< " mesh.MoveNode( "<<n->GetID()<< ", "<< n->X()
1675 << ", "<<n->Y()<<", "<< n->Z()<< ")\t\t # "<< ln <<" "<< txt << endl; }
1676 void _dumpCmd(const string& txt, int ln)
1677 { if (py) *py<< " "<<txt<<" # "<< ln <<endl; }
1678 void dumpFunctionEnd()
1679 { if (py) *py<< " return"<< endl; }
1680 void dumpChangeNodes( const SMDS_MeshElement* f )
1681 { if (py) { *py<< " mesh.ChangeElemNodes( " << f->GetID()<<", [";
1682 for ( int i=1; i < f->NbNodes(); ++i ) *py << f->GetNode(i-1)->GetID()<<", ";
1683 *py << f->GetNode( f->NbNodes()-1 )->GetID() << " ])"<< endl; }}
1684 #define debugMsg( txt ) { cout << "# "<< txt << " (line: " << __LINE__ << ")" << endl; }
1688 struct PyDump { PyDump(SMESH_Mesh&) {} void Finish() {} };
1689 #define dumpFunction(f) f
1691 #define dumpMoveComm(n,txt)
1692 #define dumpCmd(txt)
1693 #define dumpFunctionEnd()
1694 #define dumpChangeNodes(f) { if(f) {} } // prevent "unused variable 'f'" warning
1695 #define debugMsg( txt ) {}
1700 using namespace VISCOUS_3D;
1702 //================================================================================
1704 * \brief Constructor of _ViscousBuilder
1706 //================================================================================
1708 _ViscousBuilder::_ViscousBuilder()
1710 _error = SMESH_ComputeError::New(COMPERR_OK);
1714 //================================================================================
1716 * \brief Stores error description and returns false
1718 //================================================================================
1720 bool _ViscousBuilder::error(const string& text, int solidId )
1722 const string prefix = string("Viscous layers builder: ");
1723 _error->myName = COMPERR_ALGO_FAILED;
1724 _error->myComment = prefix + text;
1727 SMESH_subMesh* sm = _mesh->GetSubMeshContaining( solidId );
1728 if ( !sm && !_sdVec.empty() )
1729 sm = _mesh->GetSubMeshContaining( solidId = _sdVec[0]._index );
1730 if ( sm && sm->GetSubShape().ShapeType() == TopAbs_SOLID )
1732 SMESH_ComputeErrorPtr& smError = sm->GetComputeError();
1733 if ( smError && smError->myAlgo )
1734 _error->myAlgo = smError->myAlgo;
1736 sm->ComputeStateEngine( SMESH_subMesh::CHECK_COMPUTE_STATE );
1738 // set KO to all solids
1739 for ( size_t i = 0; i < _sdVec.size(); ++i )
1741 if ( _sdVec[i]._index == solidId )
1743 sm = _mesh->GetSubMesh( _sdVec[i]._solid );
1744 if ( !sm->IsEmpty() )
1746 SMESH_ComputeErrorPtr& smError = sm->GetComputeError();
1747 if ( !smError || smError->IsOK() )
1749 smError = SMESH_ComputeError::New( COMPERR_ALGO_FAILED, prefix + "failed");
1750 sm->ComputeStateEngine( SMESH_subMesh::CHECK_COMPUTE_STATE );
1754 makeGroupOfLE(); // debug
1759 //================================================================================
1761 * \brief At study restoration, restore event listeners used to clear an inferior
1762 * dim sub-mesh modified by viscous layers
1764 //================================================================================
1766 void _ViscousBuilder::RestoreListeners()
1771 //================================================================================
1773 * \brief computes SMESH_ProxyMesh::SubMesh::_n2n
1775 //================================================================================
1777 bool _ViscousBuilder::MakeN2NMap( _MeshOfSolid* pm )
1779 SMESH_subMesh* solidSM = pm->mySubMeshes.front();
1780 TopExp_Explorer fExp( solidSM->GetSubShape(), TopAbs_FACE );
1781 for ( ; fExp.More(); fExp.Next() )
1783 SMESHDS_SubMesh* srcSmDS = pm->GetMeshDS()->MeshElements( fExp.Current() );
1784 const SMESH_ProxyMesh::SubMesh* prxSmDS = pm->GetProxySubMesh( fExp.Current() );
1786 if ( !srcSmDS || !prxSmDS || !srcSmDS->NbElements() || !prxSmDS->NbElements() )
1788 if ( srcSmDS->GetElements()->next() == prxSmDS->GetElements()->next())
1791 if ( srcSmDS->NbElements() != prxSmDS->NbElements() )
1792 return error( "Different nb elements in a source and a proxy sub-mesh", solidSM->GetId());
1794 SMDS_ElemIteratorPtr srcIt = srcSmDS->GetElements();
1795 SMDS_ElemIteratorPtr prxIt = prxSmDS->GetElements();
1796 while( prxIt->more() )
1798 const SMDS_MeshElement* fSrc = srcIt->next();
1799 const SMDS_MeshElement* fPrx = prxIt->next();
1800 if ( fSrc->NbNodes() != fPrx->NbNodes())
1801 return error( "Different elements in a source and a proxy sub-mesh", solidSM->GetId());
1802 for ( int i = 0 ; i < fPrx->NbNodes(); ++i )
1803 pm->setNode2Node( fSrc->GetNode(i), fPrx->GetNode(i), prxSmDS );
1806 pm->_n2nMapComputed = true;
1810 //================================================================================
1812 * \brief Does its job
1814 //================================================================================
1816 SMESH_ComputeErrorPtr _ViscousBuilder::Compute(SMESH_Mesh& theMesh,
1817 const TopoDS_Shape& theShape)
1819 // TODO: set priority of solids during Gen::Compute()
1823 // check if proxy mesh already computed
1824 TopExp_Explorer exp( theShape, TopAbs_SOLID );
1826 return error("No SOLID's in theShape"), _error;
1828 if ( _ViscousListener::GetSolidMesh( _mesh, exp.Current(), /*toCreate=*/false))
1829 return SMESH_ComputeErrorPtr(); // everything already computed
1831 PyDump debugDump( theMesh );
1833 // TODO: ignore already computed SOLIDs
1834 if ( !findSolidsWithLayers())
1837 if ( !findFacesWithLayers() )
1840 for ( size_t i = 0; i < _sdVec.size(); ++i )
1842 if ( ! makeLayer(_sdVec[i]) )
1845 if ( _sdVec[i]._n2eMap.size() == 0 )
1848 if ( ! inflate(_sdVec[i]) )
1851 if ( ! refine(_sdVec[i]) )
1857 addBoundaryElements();
1859 makeGroupOfLE(); // debug
1865 //================================================================================
1867 * \brief Check validity of hypotheses
1869 //================================================================================
1871 SMESH_ComputeErrorPtr _ViscousBuilder::CheckHypotheses( SMESH_Mesh& mesh,
1872 const TopoDS_Shape& shape )
1876 if ( _ViscousListener::GetSolidMesh( _mesh, shape, /*toCreate=*/false))
1877 return SMESH_ComputeErrorPtr(); // everything already computed
1880 findSolidsWithLayers();
1881 bool ok = findFacesWithLayers( true );
1883 // remove _MeshOfSolid's of _SolidData's
1884 for ( size_t i = 0; i < _sdVec.size(); ++i )
1885 _ViscousListener::RemoveSolidMesh( _mesh, _sdVec[i]._solid );
1890 return SMESH_ComputeErrorPtr();
1893 //================================================================================
1895 * \brief Finds SOLIDs to compute using viscous layers. Fills _sdVec
1897 //================================================================================
1899 bool _ViscousBuilder::findSolidsWithLayers()
1902 TopTools_IndexedMapOfShape allSolids;
1903 TopExp::MapShapes( _mesh->GetShapeToMesh(), TopAbs_SOLID, allSolids );
1904 _sdVec.reserve( allSolids.Extent());
1906 SMESH_Gen* gen = _mesh->GetGen();
1907 SMESH_HypoFilter filter;
1908 for ( int i = 1; i <= allSolids.Extent(); ++i )
1910 // find StdMeshers_ViscousLayers hyp assigned to the i-th solid
1911 SMESH_Algo* algo = gen->GetAlgo( *_mesh, allSolids(i) );
1912 if ( !algo ) continue;
1913 // TODO: check if algo is hidden
1914 const list <const SMESHDS_Hypothesis *> & allHyps =
1915 algo->GetUsedHypothesis(*_mesh, allSolids(i), /*ignoreAuxiliary=*/false);
1916 _SolidData* soData = 0;
1917 list< const SMESHDS_Hypothesis *>::const_iterator hyp = allHyps.begin();
1918 const StdMeshers_ViscousLayers* viscHyp = 0;
1919 for ( ; hyp != allHyps.end(); ++hyp )
1920 if (( viscHyp = dynamic_cast<const StdMeshers_ViscousLayers*>( *hyp )))
1922 TopoDS_Shape hypShape;
1923 filter.Init( filter.Is( viscHyp ));
1924 _mesh->GetHypothesis( allSolids(i), filter, true, &hypShape );
1928 _MeshOfSolid* proxyMesh = _ViscousListener::GetSolidMesh( _mesh,
1931 _sdVec.push_back( _SolidData( allSolids(i), proxyMesh ));
1932 soData = & _sdVec.back();
1933 soData->_index = getMeshDS()->ShapeToIndex( allSolids(i));
1934 soData->_helper = new SMESH_MesherHelper( *_mesh );
1935 soData->_helper->SetSubShape( allSolids(i) );
1937 soData->_hyps.push_back( viscHyp );
1938 soData->_hypShapes.push_back( hypShape );
1941 if ( _sdVec.empty() )
1943 ( SMESH_Comment(StdMeshers_ViscousLayers::GetHypType()) << " hypothesis not found",0);
1948 //================================================================================
1952 //================================================================================
1954 bool _ViscousBuilder::findFacesWithLayers(const bool onlyWith)
1956 SMESH_MesherHelper helper( *_mesh );
1957 TopExp_Explorer exp;
1958 TopTools_IndexedMapOfShape solids;
1960 // collect all faces-to-ignore defined by hyp
1961 for ( size_t i = 0; i < _sdVec.size(); ++i )
1963 solids.Add( _sdVec[i]._solid );
1965 // get faces-to-ignore defined by each hyp
1966 typedef const StdMeshers_ViscousLayers* THyp;
1967 typedef std::pair< set<TGeomID>, THyp > TFacesOfHyp;
1968 list< TFacesOfHyp > ignoreFacesOfHyps;
1969 list< THyp >::iterator hyp = _sdVec[i]._hyps.begin();
1970 list< TopoDS_Shape >::iterator hypShape = _sdVec[i]._hypShapes.begin();
1971 for ( ; hyp != _sdVec[i]._hyps.end(); ++hyp, ++hypShape )
1973 ignoreFacesOfHyps.push_back( TFacesOfHyp( set<TGeomID>(), *hyp ));
1974 getIgnoreFaces( _sdVec[i]._solid, *hyp, *hypShape, ignoreFacesOfHyps.back().first );
1977 // fill _SolidData::_face2hyp and check compatibility of hypotheses
1978 const int nbHyps = _sdVec[i]._hyps.size();
1981 // check if two hypotheses define different parameters for the same FACE
1982 list< TFacesOfHyp >::iterator igFacesOfHyp;
1983 for ( exp.Init( _sdVec[i]._solid, TopAbs_FACE ); exp.More(); exp.Next() )
1985 const TGeomID faceID = getMeshDS()->ShapeToIndex( exp.Current() );
1987 igFacesOfHyp = ignoreFacesOfHyps.begin();
1988 for ( ; igFacesOfHyp != ignoreFacesOfHyps.end(); ++igFacesOfHyp )
1989 if ( ! igFacesOfHyp->first.count( faceID ))
1992 return error(SMESH_Comment("Several hypotheses define "
1993 "Viscous Layers on the face #") << faceID );
1994 hyp = igFacesOfHyp->second;
1997 _sdVec[i]._face2hyp.insert( make_pair( faceID, hyp ));
1999 _sdVec[i]._ignoreFaceIds.insert( faceID );
2002 // check if two hypotheses define different number of viscous layers for
2003 // adjacent faces of a solid
2004 set< int > nbLayersSet;
2005 igFacesOfHyp = ignoreFacesOfHyps.begin();
2006 for ( ; igFacesOfHyp != ignoreFacesOfHyps.end(); ++igFacesOfHyp )
2008 nbLayersSet.insert( igFacesOfHyp->second->GetNumberLayers() );
2010 if ( nbLayersSet.size() > 1 )
2012 for ( exp.Init( _sdVec[i]._solid, TopAbs_EDGE ); exp.More(); exp.Next() )
2014 PShapeIteratorPtr fIt = helper.GetAncestors( exp.Current(), *_mesh, TopAbs_FACE );
2015 THyp hyp1 = 0, hyp2 = 0;
2016 while( const TopoDS_Shape* face = fIt->next() )
2018 const TGeomID faceID = getMeshDS()->ShapeToIndex( *face );
2019 map< TGeomID, THyp >::iterator f2h = _sdVec[i]._face2hyp.find( faceID );
2020 if ( f2h != _sdVec[i]._face2hyp.end() )
2022 ( hyp1 ? hyp2 : hyp1 ) = f2h->second;
2025 if ( hyp1 && hyp2 &&
2026 hyp1->GetNumberLayers() != hyp2->GetNumberLayers() )
2028 return error("Two hypotheses define different number of "
2029 "viscous layers on adjacent faces");
2033 } // if ( nbHyps > 1 )
2036 _sdVec[i]._ignoreFaceIds.swap( ignoreFacesOfHyps.back().first );
2040 if ( onlyWith ) // is called to check hypotheses compatibility only
2043 // fill _SolidData::_reversedFaceIds
2044 for ( size_t i = 0; i < _sdVec.size(); ++i )
2046 exp.Init( _sdVec[i]._solid.Oriented( TopAbs_FORWARD ), TopAbs_FACE );
2047 for ( ; exp.More(); exp.Next() )
2049 const TopoDS_Face& face = TopoDS::Face( exp.Current() );
2050 const TGeomID faceID = getMeshDS()->ShapeToIndex( face );
2051 if ( //!sdVec[i]._ignoreFaceIds.count( faceID ) &&
2052 helper.NbAncestors( face, *_mesh, TopAbs_SOLID ) > 1 &&
2053 helper.IsReversedSubMesh( face ))
2055 _sdVec[i]._reversedFaceIds.insert( faceID );
2060 // Find faces to shrink mesh on (solution 2 in issue 0020832);
2061 TopTools_IndexedMapOfShape shapes;
2062 for ( size_t i = 0; i < _sdVec.size(); ++i )
2065 TopExp::MapShapes(_sdVec[i]._solid, TopAbs_EDGE, shapes);
2066 for ( int iE = 1; iE <= shapes.Extent(); ++iE )
2068 const TopoDS_Shape& edge = shapes(iE);
2069 // find 2 faces sharing an edge
2071 PShapeIteratorPtr fIt = helper.GetAncestors(edge, *_mesh, TopAbs_FACE);
2072 while ( fIt->more())
2074 const TopoDS_Shape* f = fIt->next();
2075 if ( helper.IsSubShape( *f, _sdVec[i]._solid))
2076 FF[ int( !FF[0].IsNull()) ] = *f;
2078 if( FF[1].IsNull() ) continue; // seam edge can be shared by 1 FACE only
2079 // check presence of layers on them
2081 for ( int j = 0; j < 2; ++j )
2082 ignore[j] = _sdVec[i]._ignoreFaceIds.count ( getMeshDS()->ShapeToIndex( FF[j] ));
2083 if ( ignore[0] == ignore[1] )
2084 continue; // nothing interesting
2085 TopoDS_Shape fWOL = FF[ ignore[0] ? 0 : 1 ];
2086 // check presence of layers on fWOL within an adjacent SOLID
2087 bool collision = false;
2088 PShapeIteratorPtr sIt = helper.GetAncestors( fWOL, *_mesh, TopAbs_SOLID );
2089 while ( const TopoDS_Shape* solid = sIt->next() )
2090 if ( !solid->IsSame( _sdVec[i]._solid ))
2092 int iSolid = solids.FindIndex( *solid );
2093 int iFace = getMeshDS()->ShapeToIndex( fWOL );
2094 if ( iSolid > 0 && !_sdVec[ iSolid-1 ]._ignoreFaceIds.count( iFace ))
2096 //_sdVec[i]._noShrinkShapes.insert( iFace );
2102 if ( !fWOL.IsNull())
2104 TGeomID edgeInd = getMeshDS()->ShapeToIndex( edge );
2105 _sdVec[i]._shrinkShape2Shape.insert( make_pair( edgeInd, fWOL ));
2108 // _shrinkShape2Shape will be used to temporary inflate _LayerEdge's based
2109 // on the edge but shrink won't be performed
2110 _sdVec[i]._noShrinkShapes.insert( edgeInd );
2115 // Exclude from _shrinkShape2Shape FACE's that can't be shrinked since
2116 // the algo of the SOLID sharing the FACE does not support it
2117 set< string > notSupportAlgos; notSupportAlgos.insert("Hexa_3D");
2118 for ( size_t i = 0; i < _sdVec.size(); ++i )
2120 map< TGeomID, TopoDS_Shape >::iterator e2f = _sdVec[i]._shrinkShape2Shape.begin();
2121 for ( ; e2f != _sdVec[i]._shrinkShape2Shape.end(); ++e2f )
2123 const TopoDS_Shape& fWOL = e2f->second;
2124 const TGeomID edgeID = e2f->first;
2125 bool notShrinkFace = false;
2126 PShapeIteratorPtr soIt = helper.GetAncestors(fWOL, *_mesh, TopAbs_SOLID);
2127 while ( soIt->more() )
2129 const TopoDS_Shape* solid = soIt->next();
2130 if ( _sdVec[i]._solid.IsSame( *solid )) continue;
2131 SMESH_Algo* algo = _mesh->GetGen()->GetAlgo( *_mesh, *solid );
2132 if ( !algo || !notSupportAlgos.count( algo->GetName() )) continue;
2133 notShrinkFace = true;
2135 for ( ; iSolid < _sdVec.size(); ++iSolid )
2137 if ( _sdVec[iSolid]._solid.IsSame( *solid ) ) {
2138 if ( _sdVec[iSolid]._shrinkShape2Shape.count( edgeID ))
2139 notShrinkFace = false;
2143 if ( notShrinkFace )
2145 _sdVec[i]._noShrinkShapes.insert( edgeID );
2147 // add VERTEXes of the edge in _noShrinkShapes
2148 TopoDS_Shape edge = getMeshDS()->IndexToShape( edgeID );
2149 for ( TopoDS_Iterator vIt( edge ); vIt.More(); vIt.Next() )
2150 _sdVec[i]._noShrinkShapes.insert( getMeshDS()->ShapeToIndex( vIt.Value() ));
2152 // check if there is a collision with to-shrink-from EDGEs in iSolid
2153 if ( iSolid == _sdVec.size() )
2154 continue; // no VL in the solid
2156 TopExp::MapShapes( fWOL, TopAbs_EDGE, shapes);
2157 for ( int iE = 1; iE <= shapes.Extent(); ++iE )
2159 const TopoDS_Edge& E = TopoDS::Edge( shapes( iE ));
2160 const TGeomID eID = getMeshDS()->ShapeToIndex( E );
2161 if ( eID == edgeID ||
2162 !_sdVec[iSolid]._shrinkShape2Shape.count( eID ) ||
2163 _sdVec[i]._noShrinkShapes.count( eID ))
2165 for ( int is1st = 0; is1st < 2; ++is1st )
2167 TopoDS_Vertex V = helper.IthVertex( is1st, E );
2168 if ( _sdVec[i]._noShrinkShapes.count( getMeshDS()->ShapeToIndex( V ) ))
2170 // _sdVec[i]._noShrinkShapes.insert( eID );
2171 // V = helper.IthVertex( !is1st, E );
2172 // _sdVec[i]._noShrinkShapes.insert( getMeshDS()->ShapeToIndex( V ));
2173 //iE = 0; // re-start the loop on EDGEs of fWOL
2174 return error("No way to make a conformal mesh with "
2175 "the given set of faces with layers", _sdVec[i]._index);
2181 } // while ( soIt->more() )
2182 } // loop on _sdVec[i]._shrinkShape2Shape
2183 } // loop on _sdVec to fill in _SolidData::_noShrinkShapes
2185 // Find the SHAPE along which to inflate _LayerEdge based on VERTEX
2187 for ( size_t i = 0; i < _sdVec.size(); ++i )
2190 TopExp::MapShapes(_sdVec[i]._solid, TopAbs_VERTEX, shapes);
2191 for ( int iV = 1; iV <= shapes.Extent(); ++iV )
2193 const TopoDS_Shape& vertex = shapes(iV);
2194 // find faces WOL sharing the vertex
2195 vector< TopoDS_Shape > facesWOL;
2196 size_t totalNbFaces = 0;
2197 PShapeIteratorPtr fIt = helper.GetAncestors(vertex, *_mesh, TopAbs_FACE);
2198 while ( fIt->more())
2200 const TopoDS_Shape* f = fIt->next();
2201 if ( helper.IsSubShape( *f, _sdVec[i]._solid ) )
2204 const int fID = getMeshDS()->ShapeToIndex( *f );
2205 if ( _sdVec[i]._ignoreFaceIds.count ( fID ) /*&&
2206 !_sdVec[i]._noShrinkShapes.count( fID )*/)
2207 facesWOL.push_back( *f );
2210 if ( facesWOL.size() == totalNbFaces || facesWOL.empty() )
2211 continue; // no layers at this vertex or no WOL
2212 TGeomID vInd = getMeshDS()->ShapeToIndex( vertex );
2213 switch ( facesWOL.size() )
2217 helper.SetSubShape( facesWOL[0] );
2218 if ( helper.IsRealSeam( vInd )) // inflate along a seam edge?
2220 TopoDS_Shape seamEdge;
2221 PShapeIteratorPtr eIt = helper.GetAncestors(vertex, *_mesh, TopAbs_EDGE);
2222 while ( eIt->more() && seamEdge.IsNull() )
2224 const TopoDS_Shape* e = eIt->next();
2225 if ( helper.IsRealSeam( *e ) )
2228 if ( !seamEdge.IsNull() )
2230 _sdVec[i]._shrinkShape2Shape.insert( make_pair( vInd, seamEdge ));
2234 _sdVec[i]._shrinkShape2Shape.insert( make_pair( vInd, facesWOL[0] ));
2239 // find an edge shared by 2 faces
2240 PShapeIteratorPtr eIt = helper.GetAncestors(vertex, *_mesh, TopAbs_EDGE);
2241 while ( eIt->more())
2243 const TopoDS_Shape* e = eIt->next();
2244 if ( helper.IsSubShape( *e, facesWOL[0]) &&
2245 helper.IsSubShape( *e, facesWOL[1]))
2247 _sdVec[i]._shrinkShape2Shape.insert( make_pair( vInd, *e )); break;
2253 return error("Not yet supported case", _sdVec[i]._index);
2258 // add FACEs of other SOLIDs to _ignoreFaceIds
2259 for ( size_t i = 0; i < _sdVec.size(); ++i )
2262 TopExp::MapShapes(_sdVec[i]._solid, TopAbs_FACE, shapes);
2264 for ( exp.Init( _mesh->GetShapeToMesh(), TopAbs_FACE ); exp.More(); exp.Next() )
2266 if ( !shapes.Contains( exp.Current() ))
2267 _sdVec[i]._ignoreFaceIds.insert( getMeshDS()->ShapeToIndex( exp.Current() ));
2274 //================================================================================
2276 * \brief Finds FACEs w/o layers for a given SOLID by an hypothesis
2278 //================================================================================
2280 void _ViscousBuilder::getIgnoreFaces(const TopoDS_Shape& solid,
2281 const StdMeshers_ViscousLayers* hyp,
2282 const TopoDS_Shape& hypShape,
2283 set<TGeomID>& ignoreFaceIds)
2285 TopExp_Explorer exp;
2287 vector<TGeomID> ids = hyp->GetBndShapes();
2288 if ( hyp->IsToIgnoreShapes() ) // FACEs to ignore are given
2290 for ( size_t ii = 0; ii < ids.size(); ++ii )
2292 const TopoDS_Shape& s = getMeshDS()->IndexToShape( ids[ii] );
2293 if ( !s.IsNull() && s.ShapeType() == TopAbs_FACE )
2294 ignoreFaceIds.insert( ids[ii] );
2297 else // FACEs with layers are given
2299 exp.Init( solid, TopAbs_FACE );
2300 for ( ; exp.More(); exp.Next() )
2302 TGeomID faceInd = getMeshDS()->ShapeToIndex( exp.Current() );
2303 if ( find( ids.begin(), ids.end(), faceInd ) == ids.end() )
2304 ignoreFaceIds.insert( faceInd );
2308 // ignore internal FACEs if inlets and outlets are specified
2309 if ( hyp->IsToIgnoreShapes() )
2311 TopTools_IndexedDataMapOfShapeListOfShape solidsOfFace;
2312 TopExp::MapShapesAndAncestors( hypShape,
2313 TopAbs_FACE, TopAbs_SOLID, solidsOfFace);
2315 for ( exp.Init( solid, TopAbs_FACE ); exp.More(); exp.Next() )
2317 const TopoDS_Face& face = TopoDS::Face( exp.Current() );
2318 if ( SMESH_MesherHelper::NbAncestors( face, *_mesh, TopAbs_SOLID ) < 2 )
2321 int nbSolids = solidsOfFace.FindFromKey( face ).Extent();
2323 ignoreFaceIds.insert( getMeshDS()->ShapeToIndex( face ));
2328 //================================================================================
2330 * \brief Create the inner surface of the viscous layer and prepare data for infation
2332 //================================================================================
2334 bool _ViscousBuilder::makeLayer(_SolidData& data)
2336 // get all sub-shapes to make layers on
2337 set<TGeomID> subIds, faceIds;
2338 subIds = data._noShrinkShapes;
2339 TopExp_Explorer exp( data._solid, TopAbs_FACE );
2340 for ( ; exp.More(); exp.Next() )
2342 SMESH_subMesh* fSubM = _mesh->GetSubMesh( exp.Current() );
2343 if ( ! data._ignoreFaceIds.count( fSubM->GetId() ))
2344 faceIds.insert( fSubM->GetId() );
2347 // make a map to find new nodes on sub-shapes shared with other SOLID
2348 map< TGeomID, TNode2Edge* >::iterator s2ne;
2349 map< TGeomID, TopoDS_Shape >::iterator s2s = data._shrinkShape2Shape.begin();
2350 for (; s2s != data._shrinkShape2Shape.end(); ++s2s )
2352 TGeomID shapeInd = s2s->first;
2353 for ( size_t i = 0; i < _sdVec.size(); ++i )
2355 if ( _sdVec[i]._index == data._index ) continue;
2356 map< TGeomID, TopoDS_Shape >::iterator s2s2 = _sdVec[i]._shrinkShape2Shape.find( shapeInd );
2357 if ( s2s2 != _sdVec[i]._shrinkShape2Shape.end() &&
2358 *s2s == *s2s2 && !_sdVec[i]._n2eMap.empty() )
2360 data._s2neMap.insert( make_pair( shapeInd, &_sdVec[i]._n2eMap ));
2366 // Create temporary faces and _LayerEdge's
2368 dumpFunction(SMESH_Comment("makeLayers_")<<data._index);
2370 data._stepSize = Precision::Infinite();
2371 data._stepSizeNodes[0] = 0;
2373 SMESH_MesherHelper helper( *_mesh );
2374 helper.SetSubShape( data._solid );
2375 helper.SetElementsOnShape( true );
2377 vector< const SMDS_MeshNode*> newNodes; // of a mesh face
2378 TNode2Edge::iterator n2e2;
2380 // collect _LayerEdge's of shapes they are based on
2381 vector< _EdgesOnShape >& edgesByGeom = data._edgesOnShape;
2382 const int nbShapes = getMeshDS()->MaxShapeIndex();
2383 edgesByGeom.resize( nbShapes+1 );
2385 // set data of _EdgesOnShape's
2386 if ( SMESH_subMesh* sm = _mesh->GetSubMesh( data._solid ))
2388 SMESH_subMeshIteratorPtr smIt = sm->getDependsOnIterator(/*includeSelf=*/false);
2389 while ( smIt->more() )
2392 if ( sm->GetSubShape().ShapeType() == TopAbs_FACE &&
2393 !faceIds.count( sm->GetId() ))
2395 setShapeData( edgesByGeom[ sm->GetId() ], sm, data );
2398 // make _LayerEdge's
2399 for ( set<TGeomID>::iterator id = faceIds.begin(); id != faceIds.end(); ++id )
2401 const TopoDS_Face& F = TopoDS::Face( getMeshDS()->IndexToShape( *id ));
2402 SMESH_subMesh* sm = _mesh->GetSubMesh( F );
2403 SMESH_ProxyMesh::SubMesh* proxySub =
2404 data._proxyMesh->getFaceSubM( F, /*create=*/true);
2406 SMESHDS_SubMesh* smDS = sm->GetSubMeshDS();
2407 if ( !smDS ) return error(SMESH_Comment("Not meshed face ") << *id, data._index );
2409 SMDS_ElemIteratorPtr eIt = smDS->GetElements();
2410 while ( eIt->more() )
2412 const SMDS_MeshElement* face = eIt->next();
2413 double faceMaxCosin = -1;
2414 _LayerEdge* maxCosinEdge = 0;
2415 int nbDegenNodes = 0;
2417 newNodes.resize( face->NbCornerNodes() );
2418 for ( size_t i = 0 ; i < newNodes.size(); ++i )
2420 const SMDS_MeshNode* n = face->GetNode( i );
2421 const int shapeID = n->getshapeId();
2422 const bool onDegenShap = helper.IsDegenShape( shapeID );
2423 const bool onDegenEdge = ( onDegenShap && n->GetPosition()->GetDim() == 1 );
2428 // substitute n on a degenerated EDGE with a node on a corresponding VERTEX
2429 const TopoDS_Shape& E = getMeshDS()->IndexToShape( shapeID );
2430 TopoDS_Vertex V = helper.IthVertex( 0, TopoDS::Edge( E ));
2431 if ( const SMDS_MeshNode* vN = SMESH_Algo::VertexNode( V, getMeshDS() )) {
2441 TNode2Edge::iterator n2e = data._n2eMap.insert( make_pair( n, (_LayerEdge*)0 )).first;
2442 if ( !(*n2e).second )
2445 _LayerEdge* edge = new _LayerEdge();
2446 edge->_nodes.push_back( n );
2448 edgesByGeom[ shapeID ]._edges.push_back( edge );
2449 const bool noShrink = data._noShrinkShapes.count( shapeID );
2451 SMESH_TNodeXYZ xyz( n );
2453 // set edge data or find already refined _LayerEdge and get data from it
2454 if (( !noShrink ) &&
2455 ( n->GetPosition()->GetTypeOfPosition() != SMDS_TOP_FACE ) &&
2456 (( s2ne = data._s2neMap.find( shapeID )) != data._s2neMap.end() ) &&
2457 (( n2e2 = (*s2ne).second->find( n )) != s2ne->second->end() ))
2459 _LayerEdge* foundEdge = (*n2e2).second;
2460 gp_XYZ lastPos = edge->Copy( *foundEdge, edgesByGeom[ shapeID ], helper );
2461 foundEdge->_pos.push_back( lastPos );
2462 // location of the last node is modified and we restore it by foundEdge->_pos.back()
2463 const_cast< SMDS_MeshNode* >
2464 ( edge->_nodes.back() )->setXYZ( xyz.X(), xyz.Y(), xyz.Z() );
2470 edge->_nodes.push_back( helper.AddNode( xyz.X(), xyz.Y(), xyz.Z() ));
2472 if ( !setEdgeData( *edge, edgesByGeom[ shapeID ], helper, data ))
2475 if ( edge->_nodes.size() < 2 )
2476 edge->Block( data );
2477 //data._noShrinkShapes.insert( shapeID );
2479 dumpMove(edge->_nodes.back());
2481 if ( edge->_cosin > faceMaxCosin )
2483 faceMaxCosin = edge->_cosin;
2484 maxCosinEdge = edge;
2487 newNodes[ i ] = n2e->second->_nodes.back();
2490 data._n2eMap.insert( make_pair( face->GetNode( i ), n2e->second ));
2492 if ( newNodes.size() - nbDegenNodes < 2 )
2495 // create a temporary face
2496 const SMDS_MeshElement* newFace =
2497 new _TmpMeshFace( newNodes, --_tmpFaceID, face->getshapeId(), face->getIdInShape() );
2498 proxySub->AddElement( newFace );
2500 // compute inflation step size by min size of element on a convex surface
2501 if ( faceMaxCosin > theMinSmoothCosin )
2502 limitStepSize( data, face, maxCosinEdge );
2504 } // loop on 2D elements on a FACE
2505 } // loop on FACEs of a SOLID to create _LayerEdge's
2508 // Set _LayerEdge::_neibors
2509 TNode2Edge::iterator n2e;
2510 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
2512 _EdgesOnShape& eos = data._edgesOnShape[iS];
2513 for ( size_t i = 0; i < eos._edges.size(); ++i )
2515 _LayerEdge* edge = eos._edges[i];
2516 TIDSortedNodeSet nearNodes;
2517 SMDS_ElemIteratorPtr fIt = edge->_nodes[0]->GetInverseElementIterator(SMDSAbs_Face);
2518 while ( fIt->more() )
2520 const SMDS_MeshElement* f = fIt->next();
2521 if ( !data._ignoreFaceIds.count( f->getshapeId() ))
2522 nearNodes.insert( f->begin_nodes(), f->end_nodes() );
2524 nearNodes.erase( edge->_nodes[0] );
2525 edge->_neibors.reserve( nearNodes.size() );
2526 TIDSortedNodeSet::iterator node = nearNodes.begin();
2527 for ( ; node != nearNodes.end(); ++node )
2528 if (( n2e = data._n2eMap.find( *node )) != data._n2eMap.end() )
2529 edge->_neibors.push_back( n2e->second );
2533 data._epsilon = 1e-7;
2534 if ( data._stepSize < 1. )
2535 data._epsilon *= data._stepSize;
2537 if ( !findShapesToSmooth( data ))
2540 // limit data._stepSize depending on surface curvature and fill data._convexFaces
2541 limitStepSizeByCurvature( data ); // !!! it must be before node substitution in _Simplex
2543 // Set target nodes into _Simplex and _LayerEdge's to _2NearEdges
2544 const SMDS_MeshNode* nn[2];
2545 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
2547 _EdgesOnShape& eos = data._edgesOnShape[iS];
2548 for ( size_t i = 0; i < eos._edges.size(); ++i )
2550 _LayerEdge* edge = eos._edges[i];
2551 if ( edge->IsOnEdge() )
2553 // get neighbor nodes
2554 bool hasData = ( edge->_2neibors->_edges[0] );
2555 if ( hasData ) // _LayerEdge is a copy of another one
2557 nn[0] = edge->_2neibors->srcNode(0);
2558 nn[1] = edge->_2neibors->srcNode(1);
2560 else if ( !findNeiborsOnEdge( edge, nn[0],nn[1], eos, data ))
2564 // set neighbor _LayerEdge's
2565 for ( int j = 0; j < 2; ++j )
2567 if (( n2e = data._n2eMap.find( nn[j] )) == data._n2eMap.end() )
2568 return error("_LayerEdge not found by src node", data._index);
2569 edge->_2neibors->_edges[j] = n2e->second;
2572 edge->SetDataByNeighbors( nn[0], nn[1], eos, helper );
2575 for ( size_t j = 0; j < edge->_simplices.size(); ++j )
2577 _Simplex& s = edge->_simplices[j];
2578 s._nNext = data._n2eMap[ s._nNext ]->_nodes.back();
2579 s._nPrev = data._n2eMap[ s._nPrev ]->_nodes.back();
2582 // For an _LayerEdge on a degenerated EDGE, copy some data from
2583 // a corresponding _LayerEdge on a VERTEX
2584 // (issue 52453, pb on a downloaded SampleCase2-Tet-netgen-mephisto.hdf)
2585 if ( helper.IsDegenShape( edge->_nodes[0]->getshapeId() ))
2587 // Generally we should not get here
2588 if ( eos.ShapeType() != TopAbs_EDGE )
2590 TopoDS_Vertex V = helper.IthVertex( 0, TopoDS::Edge( eos._shape ));
2591 const SMDS_MeshNode* vN = SMESH_Algo::VertexNode( V, getMeshDS() );
2592 if (( n2e = data._n2eMap.find( vN )) == data._n2eMap.end() )
2594 const _LayerEdge* vEdge = n2e->second;
2595 edge->_normal = vEdge->_normal;
2596 edge->_lenFactor = vEdge->_lenFactor;
2597 edge->_cosin = vEdge->_cosin;
2600 } // loop on data._edgesOnShape._edges
2601 } // loop on data._edgesOnShape
2603 // fix _LayerEdge::_2neibors on EDGEs to smooth
2604 // map< TGeomID,Handle(Geom_Curve)>::iterator e2c = data._edge2curve.begin();
2605 // for ( ; e2c != data._edge2curve.end(); ++e2c )
2606 // if ( !e2c->second.IsNull() )
2608 // if ( _EdgesOnShape* eos = data.GetShapeEdges( e2c->first ))
2609 // data.Sort2NeiborsOnEdge( eos->_edges );
2616 //================================================================================
2618 * \brief Compute inflation step size by min size of element on a convex surface
2620 //================================================================================
2622 void _ViscousBuilder::limitStepSize( _SolidData& data,
2623 const SMDS_MeshElement* face,
2624 const _LayerEdge* maxCosinEdge )
2627 double minSize = 10 * data._stepSize;
2628 const int nbNodes = face->NbCornerNodes();
2629 for ( int i = 0; i < nbNodes; ++i )
2631 const SMDS_MeshNode* nextN = face->GetNode( SMESH_MesherHelper::WrapIndex( i+1, nbNodes ));
2632 const SMDS_MeshNode* curN = face->GetNode( i );
2633 if ( nextN->GetPosition()->GetTypeOfPosition() == SMDS_TOP_FACE ||
2634 curN-> GetPosition()->GetTypeOfPosition() == SMDS_TOP_FACE )
2636 double dist = SMESH_TNodeXYZ( curN ).Distance( nextN );
2637 if ( dist < minSize )
2638 minSize = dist, iN = i;
2641 double newStep = 0.8 * minSize / maxCosinEdge->_lenFactor;
2642 if ( newStep < data._stepSize )
2644 data._stepSize = newStep;
2645 data._stepSizeCoeff = 0.8 / maxCosinEdge->_lenFactor;
2646 data._stepSizeNodes[0] = face->GetNode( iN );
2647 data._stepSizeNodes[1] = face->GetNode( SMESH_MesherHelper::WrapIndex( iN+1, nbNodes ));
2651 //================================================================================
2653 * \brief Compute inflation step size by min size of element on a convex surface
2655 //================================================================================
2657 void _ViscousBuilder::limitStepSize( _SolidData& data, const double minSize )
2659 if ( minSize < data._stepSize )
2661 data._stepSize = minSize;
2662 if ( data._stepSizeNodes[0] )
2665 SMESH_TNodeXYZ(data._stepSizeNodes[0]).Distance(data._stepSizeNodes[1]);
2666 data._stepSizeCoeff = data._stepSize / dist;
2671 //================================================================================
2673 * \brief Limit data._stepSize by evaluating curvature of shapes and fill data._convexFaces
2675 //================================================================================
2677 void _ViscousBuilder::limitStepSizeByCurvature( _SolidData& data )
2679 const int nbTestPnt = 5; // on a FACE sub-shape
2681 BRepLProp_SLProps surfProp( 2, 1e-6 );
2682 SMESH_MesherHelper helper( *_mesh );
2684 data._convexFaces.clear();
2686 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
2688 _EdgesOnShape& eof = data._edgesOnShape[iS];
2689 if ( eof.ShapeType() != TopAbs_FACE ||
2690 data._ignoreFaceIds.count( eof._shapeID ))
2693 TopoDS_Face F = TopoDS::Face( eof._shape );
2694 SMESH_subMesh * sm = eof._subMesh;
2695 const TGeomID faceID = eof._shapeID;
2697 BRepAdaptor_Surface surface( F, false );
2698 surfProp.SetSurface( surface );
2700 bool isTooCurved = false;
2702 _ConvexFace cnvFace;
2703 const double oriFactor = ( F.Orientation() == TopAbs_REVERSED ? +1. : -1. );
2704 SMESH_subMeshIteratorPtr smIt = sm->getDependsOnIterator(/*includeSelf=*/true);
2705 while ( smIt->more() )
2708 const TGeomID subID = sm->GetId();
2709 // find _LayerEdge's of a sub-shape
2711 if (( eos = data.GetShapeEdges( subID )))
2712 cnvFace._subIdToEOS.insert( make_pair( subID, eos ));
2715 // check concavity and curvature and limit data._stepSize
2716 const double minCurvature =
2717 1. / ( eos->_hyp.GetTotalThickness() * ( 1 + theThickToIntersection ));
2718 size_t iStep = Max( 1, eos->_edges.size() / nbTestPnt );
2719 for ( size_t i = 0; i < eos->_edges.size(); i += iStep )
2721 gp_XY uv = helper.GetNodeUV( F, eos->_edges[ i ]->_nodes[0] );
2722 surfProp.SetParameters( uv.X(), uv.Y() );
2723 if ( !surfProp.IsCurvatureDefined() )
2725 if ( surfProp.MaxCurvature() * oriFactor > minCurvature )
2727 limitStepSize( data, 0.9 / surfProp.MaxCurvature() * oriFactor );
2730 if ( surfProp.MinCurvature() * oriFactor > minCurvature )
2732 limitStepSize( data, 0.9 / surfProp.MinCurvature() * oriFactor );
2736 } // loop on sub-shapes of the FACE
2738 if ( !isTooCurved ) continue;
2740 _ConvexFace & convFace =
2741 data._convexFaces.insert( make_pair( faceID, cnvFace )).first->second;
2744 convFace._normalsFixed = false;
2746 // Fill _ConvexFace::_simplexTestEdges. These _LayerEdge's are used to detect
2747 // prism distortion.
2748 map< TGeomID, _EdgesOnShape* >::iterator id2eos = convFace._subIdToEOS.find( faceID );
2749 if ( id2eos != convFace._subIdToEOS.end() && !id2eos->second->_edges.empty() )
2751 // there are _LayerEdge's on the FACE it-self;
2752 // select _LayerEdge's near EDGEs
2753 _EdgesOnShape& eos = * id2eos->second;
2754 for ( size_t i = 0; i < eos._edges.size(); ++i )
2756 _LayerEdge* ledge = eos._edges[ i ];
2757 for ( size_t j = 0; j < ledge->_simplices.size(); ++j )
2758 if ( ledge->_simplices[j]._nNext->GetPosition()->GetDim() < 2 )
2760 convFace._simplexTestEdges.push_back( ledge );
2767 // where there are no _LayerEdge's on a _ConvexFace,
2768 // as e.g. on a fillet surface with no internal nodes - issue 22580,
2769 // so that collision of viscous internal faces is not detected by check of
2770 // intersection of _LayerEdge's with the viscous internal faces.
2772 set< const SMDS_MeshNode* > usedNodes;
2774 // look for _LayerEdge's with null _sWOL
2775 id2eos = convFace._subIdToEOS.begin();
2776 for ( ; id2eos != convFace._subIdToEOS.end(); ++id2eos )
2778 _EdgesOnShape& eos = * id2eos->second;
2779 if ( !eos._sWOL.IsNull() )
2781 for ( size_t i = 0; i < eos._edges.size(); ++i )
2783 _LayerEdge* ledge = eos._edges[ i ];
2784 const SMDS_MeshNode* srcNode = ledge->_nodes[0];
2785 if ( !usedNodes.insert( srcNode ).second ) continue;
2787 for ( size_t i = 0; i < ledge->_simplices.size(); ++i )
2789 usedNodes.insert( ledge->_simplices[i]._nPrev );
2790 usedNodes.insert( ledge->_simplices[i]._nNext );
2792 convFace._simplexTestEdges.push_back( ledge );
2796 } // loop on FACEs of data._solid
2799 //================================================================================
2801 * \brief Detect shapes (and _LayerEdge's on them) to smooth
2803 //================================================================================
2805 bool _ViscousBuilder::findShapesToSmooth( _SolidData& data )
2807 // define allowed thickness
2808 computeGeomSize( data ); // compute data._geomSize and _LayerEdge::_maxLen
2810 data._maxThickness = 0;
2811 data._minThickness = 1e100;
2812 list< const StdMeshers_ViscousLayers* >::iterator hyp = data._hyps.begin();
2813 for ( ; hyp != data._hyps.end(); ++hyp )
2815 data._maxThickness = Max( data._maxThickness, (*hyp)->GetTotalThickness() );
2816 data._minThickness = Min( data._minThickness, (*hyp)->GetTotalThickness() );
2818 //const double tgtThick = /*Min( 0.5 * data._geomSize, */data._maxThickness;
2820 // Find shapes needing smoothing; such a shape has _LayerEdge._normal on it's
2821 // boundry inclined to the shape at a sharp angle
2823 //list< TGeomID > shapesToSmooth;
2824 TopTools_MapOfShape edgesOfSmooFaces;
2826 SMESH_MesherHelper helper( *_mesh );
2829 vector< _EdgesOnShape >& edgesByGeom = data._edgesOnShape;
2830 data._nbShapesToSmooth = 0;
2832 for ( size_t iS = 0; iS < edgesByGeom.size(); ++iS ) // check FACEs
2834 _EdgesOnShape& eos = edgesByGeom[iS];
2835 eos._toSmooth = false;
2836 if ( eos._edges.empty() || eos.ShapeType() != TopAbs_FACE )
2839 double tgtThick = eos._hyp.GetTotalThickness();
2840 TopExp_Explorer eExp( edgesByGeom[iS]._shape, TopAbs_EDGE );
2841 for ( ; eExp.More() && !eos._toSmooth; eExp.Next() )
2843 TGeomID iE = getMeshDS()->ShapeToIndex( eExp.Current() );
2844 vector<_LayerEdge*>& eE = edgesByGeom[ iE ]._edges;
2845 if ( eE.empty() ) continue;
2848 for ( size_t i = 0; i < eE.size() && !eos._toSmooth; ++i )
2849 if ( eE[i]->_cosin > theMinSmoothCosin )
2851 SMDS_ElemIteratorPtr fIt = eE[i]->_nodes[0]->GetInverseElementIterator(SMDSAbs_Face);
2852 while ( fIt->more() && !eos._toSmooth )
2854 const SMDS_MeshElement* face = fIt->next();
2855 if ( face->getshapeId() == eos._shapeID &&
2856 getDistFromEdge( face, eE[i]->_nodes[0], faceSize ))
2858 eos._toSmooth = needSmoothing( eE[i]->_cosin, tgtThick, faceSize );
2863 if ( eos._toSmooth )
2865 for ( eExp.ReInit(); eExp.More(); eExp.Next() )
2866 edgesOfSmooFaces.Add( eExp.Current() );
2868 data.PrepareEdgesToSmoothOnFace( &edgesByGeom[iS], /*substituteSrcNodes=*/false );
2870 data._nbShapesToSmooth += eos._toSmooth;
2874 for ( size_t iS = 0; iS < edgesByGeom.size(); ++iS ) // check EDGEs
2876 _EdgesOnShape& eos = edgesByGeom[iS];
2877 eos._edgeSmoother = NULL;
2878 if ( eos._edges.empty() || eos.ShapeType() != TopAbs_EDGE ) continue;
2879 if ( !eos._hyp.ToSmooth() ) continue;
2881 const TopoDS_Edge& E = TopoDS::Edge( edgesByGeom[iS]._shape );
2882 if ( SMESH_Algo::isDegenerated( E ) || !edgesOfSmooFaces.Contains( E ))
2885 double tgtThick = eos._hyp.GetTotalThickness();
2886 for ( TopoDS_Iterator vIt( E ); vIt.More() && !eos._toSmooth; vIt.Next() )
2888 TGeomID iV = getMeshDS()->ShapeToIndex( vIt.Value() );
2889 vector<_LayerEdge*>& eV = edgesByGeom[ iV ]._edges;
2890 if ( eV.empty() ) continue;
2891 gp_Vec eDir = getEdgeDir( E, TopoDS::Vertex( vIt.Value() ));
2892 double angle = eDir.Angle( eV[0]->_normal );
2893 double cosin = Cos( angle );
2894 double cosinAbs = Abs( cosin );
2895 if ( cosinAbs > theMinSmoothCosin )
2897 // always smooth analytic EDGEs
2898 Handle(Geom_Curve) curve = _Smoother1D::CurveForSmooth( E, eos, helper );
2899 eos._toSmooth = ! curve.IsNull();
2901 // compare tgtThick with the length of an end segment
2902 SMDS_ElemIteratorPtr eIt = eV[0]->_nodes[0]->GetInverseElementIterator(SMDSAbs_Edge);
2903 while ( eIt->more() && !eos._toSmooth )
2905 const SMDS_MeshElement* endSeg = eIt->next();
2906 if ( endSeg->getshapeId() == (int) iS )
2909 SMESH_TNodeXYZ( endSeg->GetNode(0) ).Distance( endSeg->GetNode(1 ));
2910 eos._toSmooth = needSmoothing( cosinAbs, tgtThick, segLen );
2913 if ( eos._toSmooth )
2915 eos._edgeSmoother = new _Smoother1D( curve, eos );
2917 for ( size_t i = 0; i < eos._edges.size(); ++i )
2918 eos._edges[i]->Set( _LayerEdge::TO_SMOOTH );
2922 data._nbShapesToSmooth += eos._toSmooth;
2926 // Reset _cosin if no smooth is allowed by the user
2927 for ( size_t iS = 0; iS < edgesByGeom.size(); ++iS )
2929 _EdgesOnShape& eos = edgesByGeom[iS];
2930 if ( eos._edges.empty() ) continue;
2932 if ( !eos._hyp.ToSmooth() )
2933 for ( size_t i = 0; i < eos._edges.size(); ++i )
2934 eos._edges[i]->SetCosin( 0 );
2938 // Fill _eosC1 to make that C1 FACEs and EGDEs between them to be smoothed as a whole
2940 TopTools_MapOfShape c1VV;
2942 for ( size_t iS = 0; iS < edgesByGeom.size(); ++iS ) // check FACEs
2944 _EdgesOnShape& eos = edgesByGeom[iS];
2945 if ( eos._edges.empty() ||
2946 eos.ShapeType() != TopAbs_FACE ||
2950 // check EDGEs of a FACE
2951 TopTools_MapOfShape checkedEE, allVV;
2952 list< SMESH_subMesh* > smQueue( 1, eos._subMesh ); // sm of FACEs
2953 while ( !smQueue.empty() )
2955 SMESH_subMesh* sm = smQueue.front();
2956 smQueue.pop_front();
2957 SMESH_subMeshIteratorPtr smIt = sm->getDependsOnIterator(/*includeSelf=*/false);
2958 while ( smIt->more() )
2961 if ( sm->GetSubShape().ShapeType() == TopAbs_VERTEX )
2962 allVV.Add( sm->GetSubShape() );
2963 if ( sm->GetSubShape().ShapeType() != TopAbs_EDGE ||
2964 !checkedEE.Add( sm->GetSubShape() ))
2967 _EdgesOnShape* eoe = data.GetShapeEdges( sm->GetId() );
2968 vector<_LayerEdge*>& eE = eoe->_edges;
2969 if ( eE.empty() || !eoe->_sWOL.IsNull() )
2972 bool isC1 = true; // check continuity along an EDGE
2973 for ( size_t i = 0; i < eE.size() && isC1; ++i )
2974 isC1 = ( Abs( eE[i]->_cosin ) < theMinSmoothCosin );
2978 // check that mesh faces are C1 as well
2980 gp_XYZ norm1, norm2;
2981 const SMDS_MeshNode* n = eE[ eE.size() / 2 ]->_nodes[0];
2982 SMDS_ElemIteratorPtr fIt = n->GetInverseElementIterator(SMDSAbs_Face);
2983 if ( !SMESH_MeshAlgos::FaceNormal( fIt->next(), norm1, /*normalized=*/true ))
2985 while ( fIt->more() && isC1 )
2986 isC1 = ( SMESH_MeshAlgos::FaceNormal( fIt->next(), norm2, /*normalized=*/true ) &&
2987 Abs( norm1 * norm2 ) >= ( 1. - theMinSmoothCosin ));
2992 // add the EDGE and an adjacent FACE to _eosC1
2993 PShapeIteratorPtr fIt = helper.GetAncestors( sm->GetSubShape(), *_mesh, TopAbs_FACE );
2994 while ( const TopoDS_Shape* face = fIt->next() )
2996 _EdgesOnShape* eof = data.GetShapeEdges( *face );
2997 if ( !eof ) continue; // other solid
2998 if ( !eos.HasC1( eoe ))
3000 eos._eosC1.push_back( eoe );
3001 eoe->_toSmooth = false;
3002 data.PrepareEdgesToSmoothOnFace( eoe, /*substituteSrcNodes=*/false );
3004 if ( eos._shapeID != eof->_shapeID && !eos.HasC1( eof ))
3006 eos._eosC1.push_back( eof );
3007 eof->_toSmooth = false;
3008 data.PrepareEdgesToSmoothOnFace( eof, /*substituteSrcNodes=*/false );
3009 smQueue.push_back( eof->_subMesh );
3014 if ( eos._eosC1.empty() )
3017 // check VERTEXes of C1 FACEs
3018 TopTools_MapIteratorOfMapOfShape vIt( allVV );
3019 for ( ; vIt.More(); vIt.Next() )
3021 _EdgesOnShape* eov = data.GetShapeEdges( vIt.Key() );
3022 if ( !eov || eov->_edges.empty() || !eov->_sWOL.IsNull() )
3025 bool isC1 = true; // check if all adjacent FACEs are in eos._eosC1
3026 PShapeIteratorPtr fIt = helper.GetAncestors( vIt.Key(), *_mesh, TopAbs_FACE );
3027 while ( const TopoDS_Shape* face = fIt->next() )
3029 _EdgesOnShape* eof = data.GetShapeEdges( *face );
3030 if ( !eof ) continue; // other solid
3031 isC1 = ( face->IsSame( eos._shape ) || eos.HasC1( eof ));
3037 eos._eosC1.push_back( eov );
3038 data.PrepareEdgesToSmoothOnFace( eov, /*substituteSrcNodes=*/false );
3039 c1VV.Add( eov->_shape );
3043 } // fill _eosC1 of FACEs
3048 vector< pair< _EdgesOnShape*, gp_XYZ > > dirOfEdges;
3050 for ( size_t iS = 0; iS < edgesByGeom.size(); ++iS ) // check VERTEXes
3052 _EdgesOnShape& eov = edgesByGeom[iS];
3053 if ( eov._edges.empty() ||
3054 eov.ShapeType() != TopAbs_VERTEX ||
3055 c1VV.Contains( eov._shape ))
3057 const TopoDS_Vertex& V = TopoDS::Vertex( eov._shape );
3059 // get directions of surrounding EDGEs
3061 PShapeIteratorPtr fIt = helper.GetAncestors( eov._shape, *_mesh, TopAbs_EDGE );
3062 while ( const TopoDS_Shape* e = fIt->next() )
3064 _EdgesOnShape* eoe = data.GetShapeEdges( *e );
3065 if ( !eoe ) continue; // other solid
3066 gp_XYZ eDir = getEdgeDir( TopoDS::Edge( *e ), V );
3067 if ( !Precision::IsInfinite( eDir.X() ))
3068 dirOfEdges.push_back( make_pair( eoe, eDir.Normalized() ));
3071 // find EDGEs with C1 directions
3072 for ( size_t i = 0; i < dirOfEdges.size(); ++i )
3073 for ( size_t j = i+1; j < dirOfEdges.size(); ++j )
3074 if ( dirOfEdges[i].first && dirOfEdges[j].first )
3076 double dot = dirOfEdges[i].second * dirOfEdges[j].second;
3077 bool isC1 = ( dot < - ( 1. - theMinSmoothCosin ));
3080 double maxEdgeLen = 3 * Min( eov._edges[0]->_maxLen, eov._hyp.GetTotalThickness() );
3081 double eLen1 = SMESH_Algo::EdgeLength( TopoDS::Edge( dirOfEdges[i].first->_shape ));
3082 double eLen2 = SMESH_Algo::EdgeLength( TopoDS::Edge( dirOfEdges[j].first->_shape ));
3083 if ( eLen1 < maxEdgeLen ) eov._eosC1.push_back( dirOfEdges[i].first );
3084 if ( eLen2 < maxEdgeLen ) eov._eosC1.push_back( dirOfEdges[j].first );
3085 dirOfEdges[i].first = 0;
3086 dirOfEdges[j].first = 0;
3089 } // fill _eosC1 of VERTEXes
3096 //================================================================================
3098 * \brief initialize data of _EdgesOnShape
3100 //================================================================================
3102 void _ViscousBuilder::setShapeData( _EdgesOnShape& eos,
3106 if ( !eos._shape.IsNull() ||
3107 sm->GetSubShape().ShapeType() == TopAbs_WIRE )
3110 SMESH_MesherHelper helper( *_mesh );
3113 eos._shapeID = sm->GetId();
3114 eos._shape = sm->GetSubShape();
3115 if ( eos.ShapeType() == TopAbs_FACE )
3116 eos._shape.Orientation( helper.GetSubShapeOri( data._solid, eos._shape ));
3117 eos._toSmooth = false;
3121 map< TGeomID, TopoDS_Shape >::const_iterator s2s =
3122 data._shrinkShape2Shape.find( eos._shapeID );
3123 if ( s2s != data._shrinkShape2Shape.end() )
3124 eos._sWOL = s2s->second;
3126 eos._isRegularSWOL = true;
3127 if ( eos.SWOLType() == TopAbs_FACE )
3129 const TopoDS_Face& F = TopoDS::Face( eos._sWOL );
3130 Handle(ShapeAnalysis_Surface) surface = helper.GetSurface( F );
3131 eos._isRegularSWOL = ( ! surface->HasSingularities( 1e-7 ));
3135 if ( data._hyps.size() == 1 )
3137 eos._hyp = data._hyps.back();
3141 // compute average StdMeshers_ViscousLayers parameters
3142 map< TGeomID, const StdMeshers_ViscousLayers* >::iterator f2hyp;
3143 if ( eos.ShapeType() == TopAbs_FACE )
3145 if (( f2hyp = data._face2hyp.find( eos._shapeID )) != data._face2hyp.end() )
3146 eos._hyp = f2hyp->second;
3150 PShapeIteratorPtr fIt = helper.GetAncestors( eos._shape, *_mesh, TopAbs_FACE );
3151 while ( const TopoDS_Shape* face = fIt->next() )
3153 TGeomID faceID = getMeshDS()->ShapeToIndex( *face );
3154 if (( f2hyp = data._face2hyp.find( faceID )) != data._face2hyp.end() )
3155 eos._hyp.Add( f2hyp->second );
3161 if ( ! eos._hyp.UseSurfaceNormal() )
3163 if ( eos.ShapeType() == TopAbs_FACE ) // get normals to elements on a FACE
3165 SMESHDS_SubMesh* smDS = sm->GetSubMeshDS();
3166 eos._faceNormals.resize( smDS->NbElements() );
3168 SMDS_ElemIteratorPtr eIt = smDS->GetElements();
3169 for ( int iF = 0; eIt->more(); ++iF )
3171 const SMDS_MeshElement* face = eIt->next();
3172 if ( !SMESH_MeshAlgos::FaceNormal( face, eos._faceNormals[iF], /*normalized=*/true ))
3173 eos._faceNormals[iF].SetCoord( 0,0,0 );
3176 if ( !helper.IsReversedSubMesh( TopoDS::Face( eos._shape )))
3177 for ( size_t iF = 0; iF < eos._faceNormals.size(); ++iF )
3178 eos._faceNormals[iF].Reverse();
3180 else // find EOS of adjacent FACEs
3182 PShapeIteratorPtr fIt = helper.GetAncestors( eos._shape, *_mesh, TopAbs_FACE );
3183 while ( const TopoDS_Shape* face = fIt->next() )
3185 TGeomID faceID = getMeshDS()->ShapeToIndex( *face );
3186 eos._faceEOS.push_back( & data._edgesOnShape[ faceID ]);
3187 if ( eos._faceEOS.back()->_shape.IsNull() )
3188 // avoid using uninitialised _shapeID in GetNormal()
3189 eos._faceEOS.back()->_shapeID = faceID;
3195 //================================================================================
3197 * \brief Returns normal of a face
3199 //================================================================================
3201 bool _EdgesOnShape::GetNormal( const SMDS_MeshElement* face, gp_Vec& norm )
3204 const _EdgesOnShape* eos = 0;
3206 if ( face->getshapeId() == _shapeID )
3212 for ( size_t iF = 0; iF < _faceEOS.size() && !eos; ++iF )
3213 if ( face->getshapeId() == _faceEOS[ iF ]->_shapeID )
3214 eos = _faceEOS[ iF ];
3218 ( ok = ( face->getIdInShape() < (int) eos->_faceNormals.size() )))
3220 norm = eos->_faceNormals[ face->getIdInShape() ];
3224 debugMsg( "_EdgesOnShape::Normal() failed for face "<<face->GetID()
3225 << " on _shape #" << _shapeID );
3231 //================================================================================
3233 * \brief Set data of _LayerEdge needed for smoothing
3235 //================================================================================
3237 bool _ViscousBuilder::setEdgeData(_LayerEdge& edge,
3239 SMESH_MesherHelper& helper,
3242 const SMDS_MeshNode* node = edge._nodes[0]; // source node
3245 edge._maxLen = Precision::Infinite();
3248 edge._curvature = 0;
3251 // --------------------------
3252 // Compute _normal and _cosin
3253 // --------------------------
3256 edge._lenFactor = 1.;
3257 edge._normal.SetCoord(0,0,0);
3258 _Simplex::GetSimplices( node, edge._simplices, data._ignoreFaceIds, &data );
3260 int totalNbFaces = 0;
3262 std::pair< TopoDS_Face, gp_XYZ > face2Norm[20];
3266 const bool onShrinkShape = !eos._sWOL.IsNull();
3267 const bool useGeometry = (( eos._hyp.UseSurfaceNormal() ) ||
3268 ( eos.ShapeType() != TopAbs_FACE /*&& !onShrinkShape*/ ));
3270 // get geom FACEs the node lies on
3271 //if ( useGeometry )
3273 set<TGeomID> faceIds;
3274 if ( eos.ShapeType() == TopAbs_FACE )
3276 faceIds.insert( eos._shapeID );
3280 SMDS_ElemIteratorPtr fIt = node->GetInverseElementIterator(SMDSAbs_Face);
3281 while ( fIt->more() )
3282 faceIds.insert( fIt->next()->getshapeId() );
3284 set<TGeomID>::iterator id = faceIds.begin();
3285 for ( ; id != faceIds.end(); ++id )
3287 const TopoDS_Shape& s = getMeshDS()->IndexToShape( *id );
3288 if ( s.IsNull() || s.ShapeType() != TopAbs_FACE || data._ignoreFaceIds.count( *id ))
3290 F = TopoDS::Face( s );
3291 face2Norm[ totalNbFaces ].first = F;
3299 if ( onShrinkShape ) // one of faces the node is on has no layers
3301 if ( eos.SWOLType() == TopAbs_EDGE )
3303 // inflate from VERTEX along EDGE
3304 edge._normal = getEdgeDir( TopoDS::Edge( eos._sWOL ), TopoDS::Vertex( eos._shape ));
3306 else if ( eos.ShapeType() == TopAbs_VERTEX )
3308 // inflate from VERTEX along FACE
3309 edge._normal = getFaceDir( TopoDS::Face( eos._sWOL ), TopoDS::Vertex( eos._shape ),
3310 node, helper, normOK, &edge._cosin);
3314 // inflate from EDGE along FACE
3315 edge._normal = getFaceDir( TopoDS::Face( eos._sWOL ), TopoDS::Edge( eos._shape ),
3316 node, helper, normOK);
3319 else // layers are on all FACEs of SOLID the node is on
3322 for ( int iF = 0; iF < totalNbFaces; ++iF )
3324 F = TopoDS::Face( face2Norm[ iF ].first );
3325 geomNorm = getFaceNormal( node, F, helper, normOK );
3326 if ( !normOK ) continue;
3329 if ( helper.GetSubShapeOri( data._solid, F ) != TopAbs_REVERSED )
3331 face2Norm[ iF ].second = geomNorm.XYZ();
3332 edge._normal += geomNorm.XYZ();
3334 if ( nbOkNorms == 0 )
3335 return error(SMESH_Comment("Can't get normal to node ") << node->GetID(), data._index);
3337 if ( edge._normal.Modulus() < 1e-3 && nbOkNorms > 1 )
3339 // opposite normals, re-get normals at shifted positions (IPAL 52426)
3340 edge._normal.SetCoord( 0,0,0 );
3341 for ( int iF = 0; iF < totalNbFaces; ++iF )
3343 const TopoDS_Face& F = face2Norm[iF].first;
3344 geomNorm = getFaceNormal( node, F, helper, normOK, /*shiftInside=*/true );
3345 if ( helper.GetSubShapeOri( data._solid, F ) != TopAbs_REVERSED )
3348 face2Norm[ iF ].second = geomNorm.XYZ();
3349 edge._normal += face2Norm[ iF ].second;
3353 if ( totalNbFaces >= 3 )
3355 edge._normal = getNormalByOffset( &edge, face2Norm, totalNbFaces );
3359 else // !useGeometry - get _normal using surrounding mesh faces
3361 edge._normal = getWeigthedNormal( &edge );
3363 // set<TGeomID> faceIds;
3365 // SMDS_ElemIteratorPtr fIt = node->GetInverseElementIterator(SMDSAbs_Face);
3366 // while ( fIt->more() )
3368 // const SMDS_MeshElement* face = fIt->next();
3369 // if ( eos.GetNormal( face, geomNorm ))
3371 // if ( onShrinkShape && !faceIds.insert( face->getshapeId() ).second )
3372 // continue; // use only one mesh face on FACE
3373 // edge._normal += geomNorm.XYZ();
3380 //if ( eos._hyp.UseSurfaceNormal() )
3382 switch ( eos.ShapeType() )
3389 TopoDS_Edge E = TopoDS::Edge( eos._shape );
3390 gp_Vec inFaceDir = getFaceDir( F, E, node, helper, normOK );
3391 double angle = inFaceDir.Angle( edge._normal ); // [0,PI]
3392 edge._cosin = Cos( angle );
3395 case TopAbs_VERTEX: {
3396 if ( eos.SWOLType() != TopAbs_FACE ) { // else _cosin is set by getFaceDir()
3397 TopoDS_Vertex V = TopoDS::Vertex( eos._shape );
3398 gp_Vec inFaceDir = getFaceDir( F, V, node, helper, normOK );
3399 double angle = inFaceDir.Angle( edge._normal ); // [0,PI]
3400 edge._cosin = Cos( angle );
3401 if ( totalNbFaces > 2 || helper.IsSeamShape( node->getshapeId() ))
3402 for ( int iF = totalNbFaces-2; iF >=0; --iF )
3404 F = face2Norm[ iF ].first;
3405 inFaceDir = getFaceDir( F, V, node, helper, normOK=true );
3407 double angle = inFaceDir.Angle( edge._normal );
3408 double cosin = Cos( angle );
3409 if ( Abs( cosin ) > edge._cosin )
3410 edge._cosin = cosin;
3417 return error(SMESH_Comment("Invalid shape position of node ")<<node, data._index);
3421 double normSize = edge._normal.SquareModulus();
3422 if ( normSize < numeric_limits<double>::min() )
3423 return error(SMESH_Comment("Bad normal at node ")<< node->GetID(), data._index );
3425 edge._normal /= sqrt( normSize );
3427 if ( edge.Is( _LayerEdge::MULTI_NORMAL ) && edge._nodes.size() == 2 )
3429 getMeshDS()->RemoveFreeNode( edge._nodes.back(), 0, /*fromGroups=*/false );
3430 edge._nodes.resize( 1 );
3431 edge._normal.SetCoord( 0,0,0 );
3435 // Set the rest data
3436 // --------------------
3438 edge.SetCosin( edge._cosin ); // to update edge._lenFactor
3440 if ( onShrinkShape )
3442 const SMDS_MeshNode* tgtNode = edge._nodes.back();
3443 if ( SMESHDS_SubMesh* sm = getMeshDS()->MeshElements( data._solid ))
3444 sm->RemoveNode( tgtNode , /*isNodeDeleted=*/false );
3446 // set initial position which is parameters on _sWOL in this case
3447 if ( eos.SWOLType() == TopAbs_EDGE )
3449 double u = helper.GetNodeU( TopoDS::Edge( eos._sWOL ), node, 0, &normOK );
3450 edge._pos.push_back( gp_XYZ( u, 0, 0 ));
3451 if ( edge._nodes.size() > 1 )
3452 getMeshDS()->SetNodeOnEdge( tgtNode, TopoDS::Edge( eos._sWOL ), u );
3454 else // eos.SWOLType() == TopAbs_FACE
3456 gp_XY uv = helper.GetNodeUV( TopoDS::Face( eos._sWOL ), node, 0, &normOK );
3457 edge._pos.push_back( gp_XYZ( uv.X(), uv.Y(), 0));
3458 if ( edge._nodes.size() > 1 )
3459 getMeshDS()->SetNodeOnFace( tgtNode, TopoDS::Face( eos._sWOL ), uv.X(), uv.Y() );
3462 if ( edge._nodes.size() > 1 )
3464 // check if an angle between a FACE with layers and SWOL is sharp,
3465 // else the edge should not inflate
3467 for ( int iF = 0; iF < totalNbFaces && F.IsNull(); ++iF ) // find a FACE with VL
3468 if ( ! helper.IsSubShape( eos._sWOL, face2Norm[iF].first ))
3469 F = face2Norm[iF].first;
3472 geomNorm = getFaceNormal( node, F, helper, normOK );
3473 if ( helper.GetSubShapeOri( data._solid, F ) != TopAbs_REVERSED )
3474 geomNorm.Reverse(); // inside the SOLID
3475 if ( geomNorm * edge._normal < -0.001 )
3477 getMeshDS()->RemoveFreeNode( tgtNode, 0, /*fromGroups=*/false );
3478 edge._nodes.resize( 1 );
3480 else if ( edge._lenFactor > 3 )
3482 edge._lenFactor = 2;
3483 edge.Set( _LayerEdge::RISKY_SWOL );
3490 edge._pos.push_back( SMESH_TNodeXYZ( node ));
3492 if ( eos.ShapeType() == TopAbs_FACE )
3495 for ( size_t i = 0; i < edge._simplices.size(); ++i )
3497 edge._simplices[i].IsMinAngleOK( edge._pos.back(), angle );
3498 edge._minAngle = Max( edge._minAngle, angle ); // "angle" is actually cosine
3503 // Set neighbor nodes for a _LayerEdge based on EDGE
3505 if ( eos.ShapeType() == TopAbs_EDGE /*||
3506 ( onShrinkShape && posType == SMDS_TOP_VERTEX && fabs( edge._cosin ) < 1e-10 )*/)
3508 edge._2neibors = new _2NearEdges;
3509 // target nodes instead of source ones will be set later
3515 //================================================================================
3517 * \brief Return normal to a FACE at a node
3518 * \param [in] n - node
3519 * \param [in] face - FACE
3520 * \param [in] helper - helper
3521 * \param [out] isOK - true or false
3522 * \param [in] shiftInside - to find normal at a position shifted inside the face
3523 * \return gp_XYZ - normal
3525 //================================================================================
3527 gp_XYZ _ViscousBuilder::getFaceNormal(const SMDS_MeshNode* node,
3528 const TopoDS_Face& face,
3529 SMESH_MesherHelper& helper,
3536 // get a shifted position
3537 gp_Pnt p = SMESH_TNodeXYZ( node );
3538 gp_XYZ shift( 0,0,0 );
3539 TopoDS_Shape S = helper.GetSubShapeByNode( node, helper.GetMeshDS() );
3540 switch ( S.ShapeType() ) {
3543 shift = getFaceDir( face, TopoDS::Vertex( S ), node, helper, isOK );
3548 shift = getFaceDir( face, TopoDS::Edge( S ), node, helper, isOK );
3556 p.Translate( shift * 1e-5 );
3558 TopLoc_Location loc;
3559 GeomAPI_ProjectPointOnSurf& projector = helper.GetProjector( face, loc, 1e-7 );
3561 if ( !loc.IsIdentity() ) p.Transform( loc.Transformation().Inverted() );
3563 projector.Perform( p );
3564 if ( !projector.IsDone() || projector.NbPoints() < 1 )
3569 Quantity_Parameter U,V;
3570 projector.LowerDistanceParameters(U,V);
3575 uv = helper.GetNodeUV( face, node, 0, &isOK );
3581 Handle(Geom_Surface) surface = BRep_Tool::Surface( face );
3583 if ( !shiftInside &&
3584 helper.IsDegenShape( node->getshapeId() ) &&
3585 getFaceNormalAtSingularity( uv, face, helper, normal ))
3588 return normal.XYZ();
3591 int pointKind = GeomLib::NormEstim( surface, uv, 1e-5, normal );
3592 enum { REGULAR = 0, QUASYSINGULAR, CONICAL, IMPOSSIBLE };
3594 if ( pointKind == IMPOSSIBLE &&
3595 node->GetPosition()->GetDim() == 2 ) // node inside the FACE
3597 // probably NormEstim() failed due to a too high tolerance
3598 pointKind = GeomLib::NormEstim( surface, uv, 1e-20, normal );
3599 isOK = ( pointKind < IMPOSSIBLE );
3601 if ( pointKind < IMPOSSIBLE )
3603 if ( pointKind != REGULAR &&
3605 node->GetPosition()->GetDim() < 2 ) // FACE boundary
3607 gp_XYZ normShift = getFaceNormal( node, face, helper, isOK, /*shiftInside=*/true );
3608 if ( normShift * normal.XYZ() < 0. )
3614 if ( !isOK ) // hard singularity, to call with shiftInside=true ?
3616 const TGeomID faceID = helper.GetMeshDS()->ShapeToIndex( face );
3618 SMDS_ElemIteratorPtr fIt = node->GetInverseElementIterator(SMDSAbs_Face);
3619 while ( fIt->more() )
3621 const SMDS_MeshElement* f = fIt->next();
3622 if ( f->getshapeId() == faceID )
3624 isOK = SMESH_MeshAlgos::FaceNormal( f, (gp_XYZ&) normal.XYZ(), /*normalized=*/true );
3627 TopoDS_Face ff = face;
3628 ff.Orientation( TopAbs_FORWARD );
3629 if ( helper.IsReversedSubMesh( ff ))
3636 return normal.XYZ();
3639 //================================================================================
3641 * \brief Try to get normal at a singularity of a surface basing on it's nature
3643 //================================================================================
3645 bool _ViscousBuilder::getFaceNormalAtSingularity( const gp_XY& uv,
3646 const TopoDS_Face& face,
3647 SMESH_MesherHelper& helper,
3650 BRepAdaptor_Surface surface( face );
3652 if ( !getRovolutionAxis( surface, axis ))
3655 double f,l, d, du, dv;
3656 f = surface.FirstUParameter();
3657 l = surface.LastUParameter();
3658 d = ( uv.X() - f ) / ( l - f );
3659 du = ( d < 0.5 ? +1. : -1 ) * 1e-5 * ( l - f );
3660 f = surface.FirstVParameter();
3661 l = surface.LastVParameter();
3662 d = ( uv.Y() - f ) / ( l - f );
3663 dv = ( d < 0.5 ? +1. : -1 ) * 1e-5 * ( l - f );
3666 gp_Pnt2d testUV = uv;
3667 enum { REGULAR = 0, QUASYSINGULAR, CONICAL, IMPOSSIBLE };
3669 Handle(Geom_Surface) geomsurf = surface.Surface().Surface();
3670 for ( int iLoop = 0; true ; ++iLoop )
3672 testUV.SetCoord( testUV.X() + du, testUV.Y() + dv );
3673 if ( GeomLib::NormEstim( geomsurf, testUV, tol, refDir ) == REGULAR )
3680 if ( axis * refDir < 0. )
3688 //================================================================================
3690 * \brief Return a normal at a node weighted with angles taken by faces
3692 //================================================================================
3694 gp_XYZ _ViscousBuilder::getWeigthedNormal( const _LayerEdge* edge )
3696 const SMDS_MeshNode* n = edge->_nodes[0];
3698 gp_XYZ resNorm(0,0,0);
3699 SMESH_TNodeXYZ p0( n ), pP, pN;
3700 for ( size_t i = 0; i < edge->_simplices.size(); ++i )
3702 pP.Set( edge->_simplices[i]._nPrev );
3703 pN.Set( edge->_simplices[i]._nNext );
3704 gp_Vec v0P( p0, pP ), v0N( p0, pN ), vPN( pP, pN ), norm = v0P ^ v0N;
3705 double l0P = v0P.SquareMagnitude();
3706 double l0N = v0N.SquareMagnitude();
3707 double lPN = vPN.SquareMagnitude();
3708 if ( l0P < std::numeric_limits<double>::min() ||
3709 l0N < std::numeric_limits<double>::min() ||
3710 lPN < std::numeric_limits<double>::min() )
3712 double lNorm = norm.SquareMagnitude();
3713 double sin2 = lNorm / l0P / l0N;
3714 double angle = ACos(( v0P * v0N ) / Sqrt( l0P ) / Sqrt( l0N ));
3716 double weight = sin2 * angle / lPN;
3717 resNorm += weight * norm.XYZ() / Sqrt( lNorm );
3723 //================================================================================
3725 * \brief Return a normal at a node by getting a common point of offset planes
3726 * defined by the FACE normals
3728 //================================================================================
3730 gp_XYZ _ViscousBuilder::getNormalByOffset( _LayerEdge* edge,
3731 std::pair< TopoDS_Face, gp_XYZ > f2Normal[],
3734 SMESH_TNodeXYZ p0 = edge->_nodes[0];
3736 gp_XYZ resNorm(0,0,0);
3737 TopoDS_Shape V = SMESH_MesherHelper::GetSubShapeByNode( p0._node, getMeshDS() );
3738 if ( V.ShapeType() != TopAbs_VERTEX || nbFaces < 3 )
3740 for ( int i = 0; i < nbFaces; ++i )
3741 resNorm += f2Normal[i].second;
3745 // prepare _OffsetPlane's
3746 vector< _OffsetPlane > pln( nbFaces );
3747 for ( int i = 0; i < nbFaces; ++i )
3749 pln[i]._faceIndex = i;
3750 pln[i]._plane = gp_Pln( p0 + f2Normal[i].second, f2Normal[i].second );
3753 // intersect neighboring OffsetPlane's
3754 PShapeIteratorPtr edgeIt = SMESH_MesherHelper::GetAncestors( V, *_mesh, TopAbs_EDGE );
3755 while ( const TopoDS_Shape* edge = edgeIt->next() )
3757 int f1 = -1, f2 = -1;
3758 for ( int i = 0; i < nbFaces && f2 < 0; ++i )
3759 if ( SMESH_MesherHelper::IsSubShape( *edge, f2Normal[i].first ))
3760 (( f1 < 0 ) ? f1 : f2 ) = i;
3763 pln[ f1 ].ComputeIntersectionLine( pln[ f2 ]);
3766 // get a common point
3767 gp_XYZ commonPnt( 0, 0, 0 );
3770 for ( int i = 0; i < nbFaces; ++i )
3772 commonPnt += pln[ i ].GetCommonPoint( isPointFound );
3773 nbPoints += isPointFound;
3775 gp_XYZ wgtNorm = getWeigthedNormal( edge );
3776 if ( nbPoints == 0 )
3779 commonPnt /= nbPoints;
3780 resNorm = commonPnt - p0;
3782 // choose the best among resNorm and wgtNorm
3783 resNorm.Normalize();
3784 wgtNorm.Normalize();
3785 double resMinDot = std::numeric_limits<double>::max();
3786 double wgtMinDot = std::numeric_limits<double>::max();
3787 for ( int i = 0; i < nbFaces; ++i )
3789 resMinDot = Min( resMinDot, resNorm * f2Normal[i].second );
3790 wgtMinDot = Min( wgtMinDot, wgtNorm * f2Normal[i].second );
3793 if ( Max( resMinDot, wgtMinDot ) < theMinSmoothCosin )
3795 edge->Set( _LayerEdge::MULTI_NORMAL );
3798 return ( resMinDot > wgtMinDot ) ? resNorm : wgtNorm;
3801 //================================================================================
3803 * \brief Compute line of intersection of 2 planes
3805 //================================================================================
3807 void _OffsetPlane::ComputeIntersectionLine( _OffsetPlane& pln )
3809 int iNext = bool( _faceIndexNext[0] >= 0 );
3810 _faceIndexNext[ iNext ] = pln._faceIndex;
3812 gp_XYZ n1 = _plane.Axis().Direction().XYZ();
3813 gp_XYZ n2 = pln._plane.Axis().Direction().XYZ();
3815 gp_XYZ lineDir = n1 ^ n2;
3817 double x = Abs( lineDir.X() );
3818 double y = Abs( lineDir.Y() );
3819 double z = Abs( lineDir.Z() );
3821 int cooMax; // max coordinate
3823 if (x > z) cooMax = 1;
3827 if (y > z) cooMax = 2;
3831 if ( Abs( lineDir.Coord( cooMax )) < 0.05 )
3835 // the constants in the 2 plane equations
3836 double d1 = - ( _plane.Axis().Direction().XYZ() * _plane.Location().XYZ() );
3837 double d2 = - ( pln._plane.Axis().Direction().XYZ() * pln._plane.Location().XYZ() );
3842 linePos.SetY(( d2*n1.Z() - d1*n2.Z()) / lineDir.X() );
3843 linePos.SetZ(( d1*n2.Y() - d2*n1.Y()) / lineDir.X() );
3846 linePos.SetX(( d1*n2.Z() - d2*n1.Z()) / lineDir.Y() );
3848 linePos.SetZ(( d2*n1.X() - d1*n2.X()) / lineDir.Y() );
3851 linePos.SetX(( d2*n1.Y() - d1*n2.Y()) / lineDir.Z() );
3852 linePos.SetY(( d1*n2.X() - d2*n1.X()) / lineDir.Z() );
3856 gp_Lin& line = _lines[ iNext ];
3857 line.SetDirection( lineDir );
3858 line.SetLocation ( linePos );
3860 _isLineOK[ iNext ] = true;
3863 iNext = bool( pln._faceIndexNext[0] >= 0 );
3864 pln._lines [ iNext ] = line;
3865 pln._faceIndexNext[ iNext ] = this->_faceIndex;
3866 pln._isLineOK [ iNext ] = true;
3869 //================================================================================
3871 * \brief Computes intersection point of two _lines
3873 //================================================================================
3875 gp_XYZ _OffsetPlane::GetCommonPoint(bool& isFound) const
3880 if ( NbLines() == 2 )
3882 gp_Vec lPerp0 = _lines[0].Direction().XYZ() ^ _plane.Axis().Direction().XYZ();
3883 gp_Vec l0l1 = _lines[1].Location().XYZ() - _lines[0].Location().XYZ();
3884 double dot01 = lPerp0 * _lines[1].Direction().XYZ();
3885 if ( Abs( dot01 ) > std::numeric_limits<double>::min() )
3887 double u1 = - ( lPerp0 * l0l1 ) / dot01;
3888 p = ( _lines[1].Location().XYZ() + _lines[1].Direction().XYZ() * u1 );
3896 //================================================================================
3898 * \brief Find 2 neigbor nodes of a node on EDGE
3900 //================================================================================
3902 bool _ViscousBuilder::findNeiborsOnEdge(const _LayerEdge* edge,
3903 const SMDS_MeshNode*& n1,
3904 const SMDS_MeshNode*& n2,
3908 const SMDS_MeshNode* node = edge->_nodes[0];
3909 const int shapeInd = eos._shapeID;
3910 SMESHDS_SubMesh* edgeSM = 0;
3911 if ( eos.ShapeType() == TopAbs_EDGE )
3913 edgeSM = eos._subMesh->GetSubMeshDS();
3914 if ( !edgeSM || edgeSM->NbElements() == 0 )
3915 return error(SMESH_Comment("Not meshed EDGE ") << shapeInd, data._index);
3919 SMDS_ElemIteratorPtr eIt = node->GetInverseElementIterator(SMDSAbs_Edge);
3920 while ( eIt->more() && !n2 )
3922 const SMDS_MeshElement* e = eIt->next();
3923 const SMDS_MeshNode* nNeibor = e->GetNode( 0 );
3924 if ( nNeibor == node ) nNeibor = e->GetNode( 1 );
3927 if (!edgeSM->Contains(e)) continue;
3931 TopoDS_Shape s = SMESH_MesherHelper::GetSubShapeByNode( nNeibor, getMeshDS() );
3932 if ( !SMESH_MesherHelper::IsSubShape( s, eos._sWOL )) continue;
3934 ( iN++ ? n2 : n1 ) = nNeibor;
3937 return error(SMESH_Comment("Wrongly meshed EDGE ") << shapeInd, data._index);
3941 //================================================================================
3943 * \brief Set _curvature and _2neibors->_plnNorm by 2 neigbor nodes residing the same EDGE
3945 //================================================================================
3947 void _LayerEdge::SetDataByNeighbors( const SMDS_MeshNode* n1,
3948 const SMDS_MeshNode* n2,
3949 const _EdgesOnShape& eos,
3950 SMESH_MesherHelper& helper)
3952 if ( eos.ShapeType() != TopAbs_EDGE )
3955 gp_XYZ pos = SMESH_TNodeXYZ( _nodes[0] );
3956 gp_XYZ vec1 = pos - SMESH_TNodeXYZ( n1 );
3957 gp_XYZ vec2 = pos - SMESH_TNodeXYZ( n2 );
3961 double sumLen = vec1.Modulus() + vec2.Modulus();
3962 _2neibors->_wgt[0] = 1 - vec1.Modulus() / sumLen;
3963 _2neibors->_wgt[1] = 1 - vec2.Modulus() / sumLen;
3964 double avgNormProj = 0.5 * ( _normal * vec1 + _normal * vec2 );
3965 double avgLen = 0.5 * ( vec1.Modulus() + vec2.Modulus() );
3966 if ( _curvature ) delete _curvature;
3967 _curvature = _Curvature::New( avgNormProj, avgLen );
3968 // if ( _curvature )
3969 // debugMsg( _nodes[0]->GetID()
3970 // << " CURV r,k: " << _curvature->_r<<","<<_curvature->_k
3971 // << " proj = "<<avgNormProj<< " len = " << avgLen << "| lenDelta(0) = "
3972 // << _curvature->lenDelta(0) );
3976 if ( eos._sWOL.IsNull() )
3978 TopoDS_Edge E = TopoDS::Edge( eos._shape );
3979 // if ( SMESH_Algo::isDegenerated( E ))
3981 gp_XYZ dirE = getEdgeDir( E, _nodes[0], helper );
3982 gp_XYZ plnNorm = dirE ^ _normal;
3983 double proj0 = plnNorm * vec1;
3984 double proj1 = plnNorm * vec2;
3985 if ( fabs( proj0 ) > 1e-10 || fabs( proj1 ) > 1e-10 )
3987 if ( _2neibors->_plnNorm ) delete _2neibors->_plnNorm;
3988 _2neibors->_plnNorm = new gp_XYZ( plnNorm.Normalized() );
3993 //================================================================================
3995 * \brief Copy data from a _LayerEdge of other SOLID and based on the same node;
3996 * this and other _LayerEdge's are inflated along a FACE or an EDGE
3998 //================================================================================
4000 gp_XYZ _LayerEdge::Copy( _LayerEdge& other,
4002 SMESH_MesherHelper& helper )
4004 _nodes = other._nodes;
4005 _normal = other._normal;
4007 _lenFactor = other._lenFactor;
4008 _cosin = other._cosin;
4009 _2neibors = other._2neibors;
4010 _curvature = 0; std::swap( _curvature, other._curvature );
4011 _2neibors = 0; std::swap( _2neibors, other._2neibors );
4013 gp_XYZ lastPos( 0,0,0 );
4014 if ( eos.SWOLType() == TopAbs_EDGE )
4016 double u = helper.GetNodeU( TopoDS::Edge( eos._sWOL ), _nodes[0] );
4017 _pos.push_back( gp_XYZ( u, 0, 0));
4019 u = helper.GetNodeU( TopoDS::Edge( eos._sWOL ), _nodes.back() );
4024 gp_XY uv = helper.GetNodeUV( TopoDS::Face( eos._sWOL ), _nodes[0]);
4025 _pos.push_back( gp_XYZ( uv.X(), uv.Y(), 0));
4027 uv = helper.GetNodeUV( TopoDS::Face( eos._sWOL ), _nodes.back() );
4028 lastPos.SetX( uv.X() );
4029 lastPos.SetY( uv.Y() );
4034 //================================================================================
4036 * \brief Set _cosin and _lenFactor
4038 //================================================================================
4040 void _LayerEdge::SetCosin( double cosin )
4043 cosin = Abs( _cosin );
4044 //_lenFactor = ( cosin < 1.-1e-12 ) ? Min( 2., 1./sqrt(1-cosin*cosin )) : 1.0;
4045 _lenFactor = ( cosin < 1.-1e-12 ) ? 1./sqrt(1-cosin*cosin ) : 1.0;
4048 //================================================================================
4050 * \brief Check if another _LayerEdge is a neighbor on EDGE
4052 //================================================================================
4054 bool _LayerEdge::IsNeiborOnEdge( const _LayerEdge* edge ) const
4056 return (( this->_2neibors && this->_2neibors->include( edge )) ||
4057 ( edge->_2neibors && edge->_2neibors->include( this )));
4060 //================================================================================
4062 * \brief Fills a vector<_Simplex >
4064 //================================================================================
4066 void _Simplex::GetSimplices( const SMDS_MeshNode* node,
4067 vector<_Simplex>& simplices,
4068 const set<TGeomID>& ingnoreShapes,
4069 const _SolidData* dataToCheckOri,
4073 SMDS_ElemIteratorPtr fIt = node->GetInverseElementIterator(SMDSAbs_Face);
4074 while ( fIt->more() )
4076 const SMDS_MeshElement* f = fIt->next();
4077 const TGeomID shapeInd = f->getshapeId();
4078 if ( ingnoreShapes.count( shapeInd )) continue;
4079 const int nbNodes = f->NbCornerNodes();
4080 const int srcInd = f->GetNodeIndex( node );
4081 const SMDS_MeshNode* nPrev = f->GetNode( SMESH_MesherHelper::WrapIndex( srcInd-1, nbNodes ));
4082 const SMDS_MeshNode* nNext = f->GetNode( SMESH_MesherHelper::WrapIndex( srcInd+1, nbNodes ));
4083 const SMDS_MeshNode* nOpp = f->GetNode( SMESH_MesherHelper::WrapIndex( srcInd+2, nbNodes ));
4084 if ( dataToCheckOri && dataToCheckOri->_reversedFaceIds.count( shapeInd ))
4085 std::swap( nPrev, nNext );
4086 simplices.push_back( _Simplex( nPrev, nNext, ( nbNodes == 3 ? 0 : nOpp )));
4090 SortSimplices( simplices );
4093 //================================================================================
4095 * \brief Set neighbor simplices side by side
4097 //================================================================================
4099 void _Simplex::SortSimplices(vector<_Simplex>& simplices)
4101 vector<_Simplex> sortedSimplices( simplices.size() );
4102 sortedSimplices[0] = simplices[0];
4104 for ( size_t i = 1; i < simplices.size(); ++i )
4106 for ( size_t j = 1; j < simplices.size(); ++j )
4107 if ( sortedSimplices[i-1]._nNext == simplices[j]._nPrev )
4109 sortedSimplices[i] = simplices[j];
4114 if ( nbFound == simplices.size() - 1 )
4115 simplices.swap( sortedSimplices );
4118 //================================================================================
4120 * \brief DEBUG. Create groups contating temorary data of _LayerEdge's
4122 //================================================================================
4124 void _ViscousBuilder::makeGroupOfLE()
4127 for ( size_t i = 0 ; i < _sdVec.size(); ++i )
4129 if ( _sdVec[i]._n2eMap.empty() ) continue;
4131 dumpFunction( SMESH_Comment("make_LayerEdge_") << i );
4132 TNode2Edge::iterator n2e;
4133 for ( n2e = _sdVec[i]._n2eMap.begin(); n2e != _sdVec[i]._n2eMap.end(); ++n2e )
4135 _LayerEdge* le = n2e->second;
4136 // for ( size_t iN = 1; iN < le->_nodes.size(); ++iN )
4137 // dumpCmd(SMESH_Comment("mesh.AddEdge([ ") <<le->_nodes[iN-1]->GetID()
4138 // << ", " << le->_nodes[iN]->GetID() <<"])");
4140 dumpCmd(SMESH_Comment("mesh.AddEdge([ ") <<le->_nodes[0]->GetID()
4141 << ", " << le->_nodes.back()->GetID() <<"]) # " << le->_flags );
4146 dumpFunction( SMESH_Comment("makeNormals") << i );
4147 for ( n2e = _sdVec[i]._n2eMap.begin(); n2e != _sdVec[i]._n2eMap.end(); ++n2e )
4149 _LayerEdge* edge = n2e->second;
4150 SMESH_TNodeXYZ nXYZ( edge->_nodes[0] );
4151 nXYZ += edge->_normal * _sdVec[i]._stepSize;
4152 dumpCmd(SMESH_Comment("mesh.AddEdge([ ") << edge->_nodes[0]->GetID()
4153 << ", mesh.AddNode( "<< nXYZ.X()<<","<< nXYZ.Y()<<","<< nXYZ.Z()<<")])");
4157 dumpFunction( SMESH_Comment("makeTmpFaces_") << i );
4158 dumpCmd( "faceId1 = mesh.NbElements()" );
4159 TopExp_Explorer fExp( _sdVec[i]._solid, TopAbs_FACE );
4160 for ( ; fExp.More(); fExp.Next() )
4162 if ( const SMESHDS_SubMesh* sm = _sdVec[i]._proxyMesh->GetProxySubMesh( fExp.Current() ))
4164 if ( sm->NbElements() == 0 ) continue;
4165 SMDS_ElemIteratorPtr fIt = sm->GetElements();
4166 while ( fIt->more())
4168 const SMDS_MeshElement* e = fIt->next();
4169 SMESH_Comment cmd("mesh.AddFace([");
4170 for ( int j = 0; j < e->NbCornerNodes(); ++j )
4171 cmd << e->GetNode(j)->GetID() << (j+1 < e->NbCornerNodes() ? ",": "])");
4176 dumpCmd( "faceId2 = mesh.NbElements()" );
4177 dumpCmd( SMESH_Comment( "mesh.MakeGroup( 'tmpFaces_" ) << i << "',"
4178 << "SMESH.FACE, SMESH.FT_RangeOfIds,'=',"
4179 << "'%s-%s' % (faceId1+1, faceId2))");
4185 //================================================================================
4187 * \brief Find maximal _LayerEdge length (layer thickness) limited by geometry
4189 //================================================================================
4191 void _ViscousBuilder::computeGeomSize( _SolidData& data )
4193 data._geomSize = Precision::Infinite();
4194 double intersecDist;
4195 const SMDS_MeshElement* face;
4196 SMESH_MesherHelper helper( *_mesh );
4198 SMESHUtils::Deleter<SMESH_ElementSearcher> searcher
4199 ( SMESH_MeshAlgos::GetElementSearcher( *getMeshDS(),
4200 data._proxyMesh->GetFaces( data._solid )));
4202 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
4204 _EdgesOnShape& eos = data._edgesOnShape[ iS ];
4205 if ( eos._edges.empty() )
4207 // get neighbor faces intersection with which should not be considered since
4208 // collisions are avoided by means of smoothing
4209 set< TGeomID > neighborFaces;
4210 if ( eos._hyp.ToSmooth() )
4212 SMESH_subMeshIteratorPtr subIt =
4213 eos._subMesh->getDependsOnIterator(/*includeSelf=*/eos.ShapeType() != TopAbs_FACE );
4214 while ( subIt->more() )
4216 SMESH_subMesh* sm = subIt->next();
4217 PShapeIteratorPtr fIt = helper.GetAncestors( sm->GetSubShape(), *_mesh, TopAbs_FACE );
4218 while ( const TopoDS_Shape* face = fIt->next() )
4219 neighborFaces.insert( getMeshDS()->ShapeToIndex( *face ));
4222 // find intersections
4223 double thinkness = eos._hyp.GetTotalThickness();
4224 for ( size_t i = 0; i < eos._edges.size(); ++i )
4226 if ( eos._edges[i]->Is( _LayerEdge::BLOCKED )) continue;
4227 eos._edges[i]->_maxLen = thinkness;
4228 eos._edges[i]->FindIntersection( *searcher, intersecDist, data._epsilon, eos, &face );
4229 if ( intersecDist > 0 && face )
4231 data._geomSize = Min( data._geomSize, intersecDist );
4232 if ( !neighborFaces.count( face->getshapeId() ))
4233 eos._edges[i]->_maxLen = Min( thinkness, intersecDist / ( face->GetID() < 0 ? 3. : 2. ));
4239 //================================================================================
4241 * \brief Increase length of _LayerEdge's to reach the required thickness of layers
4243 //================================================================================
4245 bool _ViscousBuilder::inflate(_SolidData& data)
4247 SMESH_MesherHelper helper( *_mesh );
4249 // Limit inflation step size by geometry size found by itersecting
4250 // normals of _LayerEdge's with mesh faces
4251 if ( data._stepSize > 0.3 * data._geomSize )
4252 limitStepSize( data, 0.3 * data._geomSize );
4254 const double tgtThick = data._maxThickness;
4255 if ( data._stepSize > data._minThickness )
4256 limitStepSize( data, data._minThickness );
4258 if ( data._stepSize < 1. )
4259 data._epsilon = data._stepSize * 1e-7;
4261 debugMsg( "-- geomSize = " << data._geomSize << ", stepSize = " << data._stepSize );
4263 findCollisionEdges( data, helper );
4265 // limit length of _LayerEdge's around MULTI_NORMAL _LayerEdge's
4266 for ( size_t i = 0; i < data._edgesOnShape.size(); ++i )
4267 if ( data._edgesOnShape[i].ShapeType() == TopAbs_VERTEX &&
4268 data._edgesOnShape[i]._edges.size() > 0 &&
4269 data._edgesOnShape[i]._edges[0]->Is( _LayerEdge::MULTI_NORMAL ))
4270 data._edgesOnShape[i]._edges[0]->Block( data );
4272 const double safeFactor = ( 2*data._maxThickness < data._geomSize ) ? 1 : theThickToIntersection;
4274 double avgThick = 0, curThick = 0, distToIntersection = Precision::Infinite();
4275 int nbSteps = 0, nbRepeats = 0;
4276 while ( avgThick < 0.99 )
4278 // new target length
4279 double prevThick = curThick;
4280 curThick += data._stepSize;
4281 if ( curThick > tgtThick )
4283 curThick = tgtThick + tgtThick*( 1.-avgThick ) * nbRepeats;
4287 double stepSize = curThick - prevThick;
4288 updateNormalsOfSmoothed( data, helper, nbSteps, stepSize ); // to ease smoothing
4290 // Elongate _LayerEdge's
4291 dumpFunction(SMESH_Comment("inflate")<<data._index<<"_step"<<nbSteps); // debug
4292 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
4294 _EdgesOnShape& eos = data._edgesOnShape[iS];
4295 if ( eos._edges.empty() ) continue;
4297 const double shapeCurThick = Min( curThick, eos._hyp.GetTotalThickness() );
4298 for ( size_t i = 0; i < eos._edges.size(); ++i )
4300 eos._edges[i]->SetNewLength( shapeCurThick, eos, helper );
4305 if ( !updateNormals( data, helper, nbSteps, stepSize )) // to avoid collisions
4308 // Improve and check quality
4309 if ( !smoothAndCheck( data, nbSteps, distToIntersection ))
4313 #ifdef __NOT_INVALIDATE_BAD_SMOOTH
4314 debugMsg("NOT INVALIDATED STEP!");
4315 return error("Smoothing failed", data._index);
4317 dumpFunction(SMESH_Comment("invalidate")<<data._index<<"_step"<<nbSteps); // debug
4318 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
4320 _EdgesOnShape& eos = data._edgesOnShape[iS];
4321 for ( size_t i = 0; i < eos._edges.size(); ++i )
4322 eos._edges[i]->InvalidateStep( nbSteps+1, eos );
4326 break; // no more inflating possible
4330 // Evaluate achieved thickness
4332 int nbActiveEdges = 0;
4333 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
4335 _EdgesOnShape& eos = data._edgesOnShape[iS];
4336 if ( eos._edges.empty() ) continue;
4338 const double shapeTgtThick = eos._hyp.GetTotalThickness();
4339 for ( size_t i = 0; i < eos._edges.size(); ++i )
4341 avgThick += Min( 1., eos._edges[i]->_len / shapeTgtThick );
4342 nbActiveEdges += ( ! eos._edges[i]->Is( _LayerEdge::BLOCKED ));
4345 avgThick /= data._n2eMap.size();
4346 debugMsg( "-- Thickness " << curThick << " ("<< avgThick*100 << "%) reached" );
4348 #ifdef BLOCK_INFLATION
4349 if ( nbActiveEdges == 0 )
4351 debugMsg( "-- Stop inflation since all _LayerEdge's BLOCKED " );
4355 if ( distToIntersection < tgtThick * avgThick * safeFactor && avgThick < 0.9 )
4357 debugMsg( "-- Stop inflation since "
4358 << " distToIntersection( "<<distToIntersection<<" ) < avgThick( "
4359 << tgtThick * avgThick << " ) * " << safeFactor );
4364 limitStepSize( data, 0.25 * distToIntersection );
4365 if ( data._stepSizeNodes[0] )
4366 data._stepSize = data._stepSizeCoeff *
4367 SMESH_TNodeXYZ(data._stepSizeNodes[0]).Distance(data._stepSizeNodes[1]);
4369 } // while ( avgThick < 0.99 )
4372 return error("failed at the very first inflation step", data._index);
4374 if ( avgThick < 0.99 )
4376 if ( !data._proxyMesh->_warning || data._proxyMesh->_warning->IsOK() )
4378 data._proxyMesh->_warning.reset
4379 ( new SMESH_ComputeError (COMPERR_WARNING,
4380 SMESH_Comment("Thickness ") << tgtThick <<
4381 " of viscous layers not reached,"
4382 " average reached thickness is " << avgThick*tgtThick));
4386 // Restore position of src nodes moved by inflation on _noShrinkShapes
4387 dumpFunction(SMESH_Comment("restoNoShrink_So")<<data._index); // debug
4388 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
4390 _EdgesOnShape& eos = data._edgesOnShape[iS];
4391 if ( !eos._edges.empty() && eos._edges[0]->_nodes.size() == 1 )
4392 for ( size_t i = 0; i < eos._edges.size(); ++i )
4394 restoreNoShrink( *eos._edges[ i ] );
4399 return safeFactor > 0; // == true (avoid warning: unused variable 'safeFactor')
4402 //================================================================================
4404 * \brief Improve quality of layer inner surface and check intersection
4406 //================================================================================
4408 bool _ViscousBuilder::smoothAndCheck(_SolidData& data,
4410 double & distToIntersection)
4412 if ( data._nbShapesToSmooth == 0 )
4413 return true; // no shapes needing smoothing
4415 bool moved, improved;
4417 vector< _LayerEdge* > movedEdges, badSmooEdges;
4418 vector< _EdgesOnShape* > eosC1; // C1 continues shapes
4419 vector< bool > isConcaveFace;
4421 SMESH_MesherHelper helper(*_mesh);
4422 Handle(ShapeAnalysis_Surface) surface;
4425 for ( int isFace = 0; isFace < 2; ++isFace ) // smooth on [ EDGEs, FACEs ]
4427 const TopAbs_ShapeEnum shapeType = isFace ? TopAbs_FACE : TopAbs_EDGE;
4429 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
4431 _EdgesOnShape& eos = data._edgesOnShape[ iS ];
4432 if ( !eos._toSmooth ||
4433 eos.ShapeType() != shapeType ||
4434 eos._edges.empty() )
4437 // already smoothed?
4438 // bool toSmooth = ( eos._edges[ 0 ]->NbSteps() >= infStep+1 );
4439 // if ( !toSmooth ) continue;
4441 if ( !eos._hyp.ToSmooth() )
4443 // smooth disabled by the user; check validy only
4444 if ( !isFace ) continue;
4445 for ( size_t i = 0; i < eos._edges.size(); ++i )
4447 _LayerEdge* edge = eos._edges[i];
4448 for ( size_t iF = 0; iF < edge->_simplices.size(); ++iF )
4449 if ( !edge->_simplices[iF].IsForward( edge->_nodes[0], edge->_pos.back(), vol ))
4451 debugMsg( "-- Stop inflation. Bad simplex ("
4452 << " "<< edge->_nodes[0]->GetID()
4453 << " "<< edge->_nodes.back()->GetID()
4454 << " "<< edge->_simplices[iF]._nPrev->GetID()
4455 << " "<< edge->_simplices[iF]._nNext->GetID() << " ) ");
4459 continue; // goto the next EDGE or FACE
4463 if ( eos.SWOLType() == TopAbs_FACE )
4465 if ( !F.IsSame( eos._sWOL )) {
4466 F = TopoDS::Face( eos._sWOL );
4467 helper.SetSubShape( F );
4468 surface = helper.GetSurface( F );
4473 F.Nullify(); surface.Nullify();
4475 const TGeomID sInd = eos._shapeID;
4477 // perform smoothing
4479 if ( eos.ShapeType() == TopAbs_EDGE )
4481 dumpFunction(SMESH_Comment("smooth")<<data._index << "_Ed"<<sInd <<"_InfStep"<<infStep);
4483 if ( !eos._edgeSmoother->Perform( data, surface, F, helper ))
4485 // smooth on EDGE's (normally we should not get here)
4489 for ( size_t i = 0; i < eos._edges.size(); ++i )
4491 moved |= eos._edges[i]->SmoothOnEdge( surface, F, helper );
4493 dumpCmd( SMESH_Comment("# end step ")<<step);
4495 while ( moved && step++ < 5 );
4500 else // smooth on FACE
4503 eosC1.push_back( & eos );
4504 eosC1.insert( eosC1.end(), eos._eosC1.begin(), eos._eosC1.end() );
4507 isConcaveFace.resize( eosC1.size() );
4508 for ( size_t iEOS = 0; iEOS < eosC1.size(); ++iEOS )
4510 isConcaveFace[ iEOS ] = data._concaveFaces.count( eosC1[ iEOS ]->_shapeID );
4511 vector< _LayerEdge* > & edges = eosC1[ iEOS ]->_edges;
4512 for ( size_t i = 0; i < edges.size(); ++i )
4513 if ( edges[i]->Is( _LayerEdge::MOVED ) ||
4514 edges[i]->Is( _LayerEdge::NEAR_BOUNDARY ))
4515 movedEdges.push_back( edges[i] );
4517 makeOffsetSurface( *eosC1[ iEOS ], helper );
4520 int step = 0, stepLimit = 5, badNb = 0;
4521 while (( ++step <= stepLimit ) || improved )
4523 dumpFunction(SMESH_Comment("smooth")<<data._index<<"_Fa"<<sInd
4524 <<"_InfStep"<<infStep<<"_"<<step); // debug
4525 int oldBadNb = badNb;
4526 badSmooEdges.clear();
4528 #ifdef INCREMENTAL_SMOOTH
4529 bool findBest = false; // ( step == stepLimit );
4530 for ( size_t i = 0; i < movedEdges.size(); ++i )
4532 movedEdges[i]->Unset( _LayerEdge::SMOOTHED );
4533 if ( movedEdges[i]->Smooth( step, findBest, movedEdges ) > 0 )
4534 badSmooEdges.push_back( movedEdges[i] );
4537 bool findBest = ( step == stepLimit || isConcaveFace[ iEOS ]);
4538 for ( size_t iEOS = 0; iEOS < eosC1.size(); ++iEOS )
4540 vector< _LayerEdge* > & edges = eosC1[ iEOS ]->_edges;
4541 for ( size_t i = 0; i < edges.size(); ++i )
4543 edges[i]->Unset( _LayerEdge::SMOOTHED );
4544 if ( edges[i]->Smooth( step, findBest, false ) > 0 )
4545 badSmooEdges.push_back( eos._edges[i] );
4549 badNb = badSmooEdges.size();
4552 debugMsg(SMESH_Comment("badNb = ") << badNb );
4554 if ( !badSmooEdges.empty() && step >= stepLimit / 2 )
4556 if ( badSmooEdges[0]->Is( _LayerEdge::ON_CONCAVE_FACE ))
4559 // resolve hard smoothing situation around concave VERTEXes
4560 for ( size_t iEOS = 0; iEOS < eosC1.size(); ++iEOS )
4562 vector< _EdgesOnShape* > & eosCoVe = eosC1[ iEOS ]->_eosConcaVer;
4563 for ( size_t i = 0; i < eosCoVe.size(); ++i )
4564 eosCoVe[i]->_edges[0]->MoveNearConcaVer( eosCoVe[i], eosC1[ iEOS ],
4565 step, badSmooEdges );
4567 // look for the best smooth of _LayerEdge's neighboring badSmooEdges
4569 for ( size_t i = 0; i < badSmooEdges.size(); ++i )
4571 _LayerEdge* ledge = badSmooEdges[i];
4572 for ( size_t iN = 0; iN < ledge->_neibors.size(); ++iN )
4574 ledge->_neibors[iN]->Unset( _LayerEdge::SMOOTHED );
4575 badNb += ledge->_neibors[iN]->Smooth( step, true, /*findBest=*/true );
4577 ledge->Unset( _LayerEdge::SMOOTHED );
4578 badNb += ledge->Smooth( step, true, /*findBest=*/true );
4580 debugMsg(SMESH_Comment("badNb = ") << badNb );
4583 if ( badNb == oldBadNb &&
4585 step < stepLimit ) // smooth w/o chech of validity
4588 dumpFunction(SMESH_Comment("smoothWoCheck")<<data._index<<"_Fa"<<sInd
4589 <<"_InfStep"<<infStep<<"_"<<step); // debug
4590 for ( size_t i = 0; i < movedEdges.size(); ++i )
4592 movedEdges[i]->SmoothWoCheck();
4594 if ( stepLimit < 9 )
4598 improved = ( badNb < oldBadNb );
4602 if (( step % 3 == 1 ) || ( badNb > 0 && step >= stepLimit / 2 ))
4603 for ( size_t iEOS = 0; iEOS < eosC1.size(); ++iEOS )
4605 putOnOffsetSurface( *eosC1[ iEOS ], infStep, step, /*moveAll=*/step == 1 );
4608 } // smoothing steps
4610 // project -- to prevent intersections or fix bad simplices
4611 for ( size_t iEOS = 0; iEOS < eosC1.size(); ++iEOS )
4613 if ( ! eosC1[ iEOS ]->_eosConcaVer.empty() || badNb > 0 )
4614 putOnOffsetSurface( *eosC1[ iEOS ], infStep );
4617 if ( !badSmooEdges.empty() )
4619 badSmooEdges.clear();
4620 for ( size_t iEOS = 0; iEOS < eosC1.size(); ++iEOS )
4622 for ( size_t i = 0; i < eosC1[ iEOS ]->_edges.size(); ++i )
4624 if ( !eosC1[ iEOS ]->_sWOL.IsNull() ) continue;
4626 _LayerEdge* edge = eosC1[ iEOS ]->_edges[i];
4627 edge->CheckNeiborsOnBoundary( & badSmooEdges );
4630 SMESH_TNodeXYZ tgtXYZ = edge->_nodes.back();
4631 const gp_XYZ& prevXYZ = edge->PrevCheckPos();
4632 for ( size_t j = 0; j < edge->_simplices.size(); ++j )
4633 if ( !edge->_simplices[j].IsForward( &prevXYZ, &tgtXYZ, vol ))
4635 debugMsg("Bad simplex ( " << edge->_nodes[0]->GetID()
4636 << " "<< tgtXYZ._node->GetID()
4637 << " "<< edge->_simplices[j]._nPrev->GetID()
4638 << " "<< edge->_simplices[j]._nNext->GetID() << " )" );
4639 badSmooEdges.push_back( edge );
4646 // try to fix bad simplices by removing the last inflation step of some _LayerEdge's
4647 badNb = invalidateBadSmooth( data, helper, badSmooEdges, eosC1, infStep );
4653 } // // smooth on FACE's
4655 } // smooth on [ EDGEs, FACEs ]
4657 // Check orientation of simplices of _LayerEdge's on EDGEs and VERTEXes
4659 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
4661 _EdgesOnShape& eos = data._edgesOnShape[ iS ];
4662 if ( eos.ShapeType() == TopAbs_FACE ||
4663 eos._edges.empty() ||
4664 !eos._sWOL.IsNull() )
4667 badSmooEdges.clear();
4668 for ( size_t i = 0; i < eos._edges.size(); ++i )
4670 _LayerEdge* edge = eos._edges[i];
4671 if ( edge->_nodes.size() < 2 ) continue;
4672 SMESH_TNodeXYZ tgtXYZ = edge->_nodes.back();
4673 const gp_XYZ& prevXYZ = edge->PrevCheckPos();
4674 //const gp_XYZ& prevXYZ = edge->PrevPos();
4675 for ( size_t j = 0; j < edge->_simplices.size(); ++j )
4676 if ( !edge->_simplices[j].IsForward( &prevXYZ, &tgtXYZ, vol ))
4678 debugMsg("Bad simplex on bnd ( " << edge->_nodes[0]->GetID()
4679 << " "<< tgtXYZ._node->GetID()
4680 << " "<< edge->_simplices[j]._nPrev->GetID()
4681 << " "<< edge->_simplices[j]._nNext->GetID() << " )" );
4682 badSmooEdges.push_back( edge );
4687 // try to fix bad simplices by removing the last inflation step of some _LayerEdge's
4689 int badNb = invalidateBadSmooth( data, helper, badSmooEdges, eosC1, infStep );
4695 // Check if the last segments of _LayerEdge intersects 2D elements;
4696 // checked elements are either temporary faces or faces on surfaces w/o the layers
4698 SMESHUtils::Deleter<SMESH_ElementSearcher> searcher
4699 ( SMESH_MeshAlgos::GetElementSearcher( *getMeshDS(),
4700 data._proxyMesh->GetFaces( data._solid )) );
4702 #ifdef BLOCK_INFLATION
4703 const bool toBlockInfaltion = true;
4705 const bool toBlockInfaltion = false;
4707 distToIntersection = Precision::Infinite();
4709 const SMDS_MeshElement* intFace = 0;
4710 const SMDS_MeshElement* closestFace = 0;
4712 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
4714 _EdgesOnShape& eos = data._edgesOnShape[ iS ];
4715 if ( eos._edges.empty() || !eos._sWOL.IsNull() )
4717 for ( size_t i = 0; i < eos._edges.size(); ++i )
4719 if ( eos._edges[i]->Is( _LayerEdge::INTERSECTED ) ||
4720 eos._edges[i]->Is( _LayerEdge::MULTI_NORMAL ))
4722 if ( eos._edges[i]->FindIntersection( *searcher, dist, data._epsilon, eos, &intFace ))
4726 SMESH_Comment msg("Invalid? normal at node "); msg << eos._edges[i]->_nodes[0]->GetID();
4731 const bool isShorterDist = ( distToIntersection > dist );
4732 if ( toBlockInfaltion || isShorterDist )
4734 // ignore intersection of a _LayerEdge based on a _ConvexFace with a face
4735 // lying on this _ConvexFace
4736 if ( _ConvexFace* convFace = data.GetConvexFace( intFace->getshapeId() ))
4737 if ( convFace->_subIdToEOS.count ( eos._shapeID ))
4740 // ignore intersection of a _LayerEdge based on a FACE with an element on this FACE
4741 // ( avoid limiting the thickness on the case of issue 22576)
4742 if ( intFace->getshapeId() == eos._shapeID )
4745 // ignore intersection with intFace of an adjacent FACE
4748 bool toIgnore = false;
4749 if ( eos._edges[i]->Is( _LayerEdge::TO_SMOOTH ))
4751 const TopoDS_Shape& S = getMeshDS()->IndexToShape( intFace->getshapeId() );
4752 if ( !S.IsNull() && S.ShapeType() == TopAbs_FACE )
4754 TopExp_Explorer edge( eos._shape, TopAbs_EDGE );
4755 for ( ; !toIgnore && edge.More(); edge.Next() )
4756 // is adjacent - has a common EDGE
4757 toIgnore = ( helper.IsSubShape( edge.Current(), S ));
4759 if ( toIgnore ) // check angle between normals
4762 if ( SMESH_MeshAlgos::FaceNormal( intFace, normal, /*normalized=*/true ))
4763 toIgnore = ( normal * eos._edges[i]->_normal > -0.5 );
4767 if ( !toIgnore ) // check if the edge is a neighbor of intFace
4769 for ( size_t iN = 0; !toIgnore && iN < eos._edges[i]->_neibors.size(); ++iN )
4771 int nInd = intFace->GetNodeIndex( eos._edges[i]->_neibors[ iN ]->_nodes.back() );
4772 toIgnore = ( nInd >= 0 );
4779 // intersection not ignored
4781 if ( toBlockInfaltion &&
4782 dist < ( eos._edges[i]->_len * theThickToIntersection ))
4784 eos._edges[i]->Set( _LayerEdge::INTERSECTED ); // not to intersect
4785 eos._edges[i]->Block( data ); // not to inflate
4787 if ( _EdgesOnShape* eof = data.GetShapeEdges( intFace->getshapeId() ))
4789 // block _LayerEdge's, on top of which intFace is
4790 if ( const _TmpMeshFace* f = dynamic_cast< const _TmpMeshFace*>( intFace ))
4792 const SMDS_MeshElement* srcFace =
4793 eof->_subMesh->GetSubMeshDS()->GetElement( f->getIdInShape() );
4794 SMDS_ElemIteratorPtr nIt = srcFace->nodesIterator();
4795 while ( nIt->more() )
4797 const SMDS_MeshNode* srcNode = static_cast<const SMDS_MeshNode*>( nIt->next() );
4798 TNode2Edge::iterator n2e = data._n2eMap.find( srcNode );
4799 if ( n2e != data._n2eMap.end() )
4800 n2e->second->Block( data );
4806 if ( isShorterDist )
4808 distToIntersection = dist;
4810 closestFace = intFace;
4813 } // if ( toBlockInfaltion || isShorterDist )
4814 } // loop on eos._edges
4815 } // loop on data._edgesOnShape
4820 SMDS_MeshElement::iterator nIt = closestFace->begin_nodes();
4821 cout << "Shortest distance: _LayerEdge nodes: tgt " << le->_nodes.back()->GetID()
4822 << " src " << le->_nodes[0]->GetID()<< ", intersection with face ("
4823 << (*nIt++)->GetID()<<" "<< (*nIt++)->GetID()<<" "<< (*nIt++)->GetID()
4824 << ") distance = " << distToIntersection<< endl;
4831 //================================================================================
4833 * \brief try to fix bad simplices by removing the last inflation step of some _LayerEdge's
4834 * \param [in,out] badSmooEdges - _LayerEdge's to fix
4835 * \return int - resulting nb of bad _LayerEdge's
4837 //================================================================================
4839 int _ViscousBuilder::invalidateBadSmooth( _SolidData& data,
4840 SMESH_MesherHelper& helper,
4841 vector< _LayerEdge* >& badSmooEdges,
4842 vector< _EdgesOnShape* >& eosC1,
4845 if ( badSmooEdges.empty() || infStep == 0 ) return 0;
4847 dumpFunction(SMESH_Comment("invalidateBadSmooth")<<"_S"<<eosC1[0]->_shapeID<<"_InfStep"<<infStep);
4852 vector< _LayerEdge* > simplexNeibors(2);
4853 for ( size_t i = 0; i < badSmooEdges.size(); ++i )
4855 _LayerEdge* edge = badSmooEdges[i];
4856 if ( edge->Is( _LayerEdge::MARKED ))
4859 // look for _LayerEdge's of bad _simplices
4860 SMESH_TNodeXYZ tgtXYZ = edge->_nodes.back();
4861 const gp_XYZ* prevXYZ = & edge->PrevCheckPos();
4862 for ( size_t j = 0; j < edge->_simplices.size(); ++j )
4864 if ( edge->_simplices[j].IsForward( prevXYZ, &tgtXYZ, vol ))
4866 simplexNeibors.clear();
4867 for ( size_t iN = 0; iN < edge->_neibors.size() && simplexNeibors.size() < 2; ++iN )
4868 if ( edge->_simplices[j].Includes( edge->_neibors[iN]->_nodes.back() ))
4869 simplexNeibors.push_back( edge->_neibors[iN] );
4870 if ( simplexNeibors.size() < 2 ) continue;
4872 // select a _LayerEdge to invalidate
4873 _LayerEdge* invaE = 0;
4875 simplexNeibors.push_back( edge );
4876 for ( int iE = 0; iE < 3; ++iE )
4878 _LayerEdge* e = simplexNeibors[ iE ];
4879 if ( e->Is( _LayerEdge::MARKED ) ||
4880 //e->Is( _LayerEdge::BLOCKED ) ||
4883 _EdgesOnShape* eos = data.GetShapeEdges( e );
4884 double len = e->_len;
4885 e->InvalidateStep( e->NbSteps(), *eos, /*restoreLength=*/true );
4887 tgtXYZ.Set( edge->_nodes.back() );
4888 prevXYZ = & edge->PrevCheckPos();
4890 if ( edge->_simplices[j].IsForward( & edge->PrevCheckPos(), &tgtXYZ, vol ) &&
4896 e->SetNewLength( len, *eos, helper );
4898 tgtXYZ.Set( edge->_nodes.back() );
4899 prevXYZ = & edge->PrevCheckPos();
4906 if ( invaE == edge ) {
4907 tgtXYZ.Set( edge->_nodes.back() );
4908 prevXYZ = & edge->PrevCheckPos();
4910 _EdgesOnShape* eos = data.GetShapeEdges( invaE );
4911 invaE->InvalidateStep( invaE->NbSteps(), *eos, /*updLen=*/true );
4912 invaE->Block( data );
4913 invaE->Set( _LayerEdge::MARKED );
4914 if ( eos->ShapeType() == TopAbs_VERTEX )
4916 // re-smooth on analytical EDGEs
4917 PShapeIteratorPtr eIt = helper.GetAncestors( eos->_shape, *_mesh, TopAbs_EDGE );
4918 while ( const TopoDS_Shape* e = eIt->next() )
4919 if ( _EdgesOnShape* eoe = data.GetShapeEdges( *e ))
4920 if ( eoe->_edgeSmoother && eoe->_edgeSmoother->isAnalytic() )
4922 TopoDS_Face F; Handle(ShapeAnalysis_Surface) surface;
4923 if ( eoe->SWOLType() == TopAbs_FACE ) {
4924 F = TopoDS::Face( eoe->_sWOL );
4925 surface = helper.GetSurface( F );
4927 eoe->_edgeSmoother->Perform( data, surface, F, helper );
4931 } // loop on edge->_simplices
4932 } // loop on badSmooEdges
4935 // check result of invalidation
4938 for ( size_t iEOS = 0; iEOS < eosC1.size(); ++iEOS )
4940 for ( size_t i = 0; i < eosC1[ iEOS ]->_edges.size(); ++i )
4942 if ( !eosC1[ iEOS ]->_sWOL.IsNull() ) continue;
4943 _LayerEdge* edge = eosC1[ iEOS ]->_edges[i];
4944 SMESH_TNodeXYZ tgtXYZ = edge->_nodes.back();
4945 const gp_XYZ& prevXYZ = edge->PrevCheckPos();
4946 for ( size_t j = 0; j < edge->_simplices.size(); ++j )
4947 if ( !edge->_simplices[j].IsForward( &prevXYZ, &tgtXYZ, vol ))
4950 debugMsg("Bad simplex remains ( " << edge->_nodes[0]->GetID()
4951 << " "<< tgtXYZ._node->GetID()
4952 << " "<< edge->_simplices[j]._nPrev->GetID()
4953 << " "<< edge->_simplices[j]._nNext->GetID() << " )" );
4962 //================================================================================
4964 * \brief Create an offset surface
4966 //================================================================================
4968 void _ViscousBuilder::makeOffsetSurface( _EdgesOnShape& eos, SMESH_MesherHelper& helper )
4970 if ( eos._offsetSurf.IsNull() ||
4971 eos._edgeForOffset == 0 ||
4972 eos._edgeForOffset->Is( _LayerEdge::BLOCKED ))
4975 Handle(ShapeAnalysis_Surface) baseSurface = helper.GetSurface( TopoDS::Face( eos._shape ));
4978 gp_Pnt tgtP = SMESH_TNodeXYZ( eos._edgeForOffset->_nodes.back() );
4979 gp_Pnt2d uv = baseSurface->ValueOfUV( tgtP, Precision::Confusion() );
4980 double offset = baseSurface->Gap();
4982 eos._offsetSurf.Nullify();
4986 BRepOffsetAPI_MakeOffsetShape offsetMaker( eos._shape, -offset, Precision::Confusion() );
4987 if ( !offsetMaker.IsDone() ) return;
4989 TopExp_Explorer fExp( offsetMaker.Shape(), TopAbs_FACE );
4990 if ( !fExp.More() ) return;
4992 TopoDS_Face F = TopoDS::Face( fExp.Current() );
4993 Handle(Geom_Surface) surf = BRep_Tool::Surface( F );
4994 if ( surf.IsNull() ) return;
4996 eos._offsetSurf = new ShapeAnalysis_Surface( surf );
4998 catch ( Standard_Failure )
5003 //================================================================================
5005 * \brief Put nodes of a curved FACE to its offset surface
5007 //================================================================================
5009 void _ViscousBuilder::putOnOffsetSurface( _EdgesOnShape& eos,
5014 if ( eos._offsetSurf.IsNull() ||
5015 eos.ShapeType() != TopAbs_FACE ||
5016 eos._edgeForOffset == 0 ||
5017 eos._edgeForOffset->Is( _LayerEdge::BLOCKED ))
5020 double preci = BRep_Tool::Tolerance( TopoDS::Face( eos._shape )), vol;
5021 for ( size_t i = 0; i < eos._edges.size(); ++i )
5023 _LayerEdge* edge = eos._edges[i];
5024 edge->Unset( _LayerEdge::MARKED );
5025 if ( edge->Is( _LayerEdge::BLOCKED ) || !edge->_curvature )
5027 if ( !moveAll && !edge->Is( _LayerEdge::MOVED ))
5030 int nbBlockedAround = 0;
5031 for ( size_t iN = 0; iN < edge->_neibors.size(); ++iN )
5032 nbBlockedAround += edge->_neibors[iN]->Is( _LayerEdge::BLOCKED );
5033 if ( nbBlockedAround > 1 )
5036 gp_Pnt tgtP = SMESH_TNodeXYZ( edge->_nodes.back() );
5037 gp_Pnt2d uv = eos._offsetSurf->NextValueOfUV( edge->_curvature->_uv, tgtP, preci );
5038 if ( eos._offsetSurf->Gap() > edge->_len ) continue; // NextValueOfUV() bug
5039 edge->_curvature->_uv = uv;
5040 if ( eos._offsetSurf->Gap() < 10 * preci ) continue; // same pos
5042 gp_XYZ newP = eos._offsetSurf->Value( uv ).XYZ();
5043 gp_XYZ prevP = edge->PrevCheckPos();
5046 for ( size_t iS = 0; iS < edge->_simplices.size() && ok; ++iS )
5048 ok = edge->_simplices[iS].IsForward( &prevP, &newP, vol );
5052 SMDS_MeshNode* n = const_cast< SMDS_MeshNode* >( edge->_nodes.back() );
5053 n->setXYZ( newP.X(), newP.Y(), newP.Z());
5054 edge->_pos.back() = newP;
5056 edge->Set( _LayerEdge::MARKED );
5061 // dumpMove() for debug
5063 for ( ; i < eos._edges.size(); ++i )
5064 if ( eos._edges[i]->Is( _LayerEdge::MARKED ))
5066 if ( i < eos._edges.size() )
5068 dumpFunction(SMESH_Comment("putOnOffsetSurface_F") << eos._shapeID
5069 << "_InfStep" << infStep << "_" << smooStep );
5070 for ( ; i < eos._edges.size(); ++i )
5072 if ( eos._edges[i]->Is( _LayerEdge::MARKED ))
5073 dumpMove( eos._edges[i]->_nodes.back() );
5080 //================================================================================
5082 * \brief Return a curve of the EDGE to be used for smoothing and arrange
5083 * _LayerEdge's to be in a consequent order
5085 //================================================================================
5087 Handle(Geom_Curve) _Smoother1D::CurveForSmooth( const TopoDS_Edge& E,
5089 SMESH_MesherHelper& helper)
5091 SMESHDS_SubMesh* smDS = eos._subMesh->GetSubMeshDS();
5093 TopLoc_Location loc; double f,l;
5095 Handle(Geom_Line) line;
5096 Handle(Geom_Circle) circle;
5097 bool isLine, isCirc;
5098 if ( eos._sWOL.IsNull() ) /////////////////////////////////////////// 3D case
5100 // check if the EDGE is a line
5101 Handle(Geom_Curve) curve = BRep_Tool::Curve( E, f, l);
5102 if ( curve->IsKind( STANDARD_TYPE( Geom_TrimmedCurve )))
5103 curve = Handle(Geom_TrimmedCurve)::DownCast( curve )->BasisCurve();
5105 line = Handle(Geom_Line)::DownCast( curve );
5106 circle = Handle(Geom_Circle)::DownCast( curve );
5107 isLine = (!line.IsNull());
5108 isCirc = (!circle.IsNull());
5110 if ( !isLine && !isCirc ) // Check if the EDGE is close to a line
5112 isLine = SMESH_Algo::IsStraight( E );
5115 line = new Geom_Line( gp::OX() ); // only type does matter
5117 if ( !isLine && !isCirc && eos._edges.size() > 2) // Check if the EDGE is close to a circle
5122 else //////////////////////////////////////////////////////////////////////// 2D case
5124 if ( !eos._isRegularSWOL ) // 23190
5127 const TopoDS_Face& F = TopoDS::Face( eos._sWOL );
5129 // check if the EDGE is a line
5130 Handle(Geom2d_Curve) curve = BRep_Tool::CurveOnSurface( E, F, f, l );
5131 if ( curve->IsKind( STANDARD_TYPE( Geom2d_TrimmedCurve )))
5132 curve = Handle(Geom2d_TrimmedCurve)::DownCast( curve )->BasisCurve();
5134 Handle(Geom2d_Line) line2d = Handle(Geom2d_Line)::DownCast( curve );
5135 Handle(Geom2d_Circle) circle2d = Handle(Geom2d_Circle)::DownCast( curve );
5136 isLine = (!line2d.IsNull());
5137 isCirc = (!circle2d.IsNull());
5139 if ( !isLine && !isCirc ) // Check if the EDGE is close to a line
5142 SMDS_NodeIteratorPtr nIt = smDS->GetNodes();
5143 while ( nIt->more() )
5144 bndBox.Add( helper.GetNodeUV( F, nIt->next() ));
5145 gp_XY size = bndBox.CornerMax() - bndBox.CornerMin();
5147 const double lineTol = 1e-2 * sqrt( bndBox.SquareExtent() );
5148 for ( int i = 0; i < 2 && !isLine; ++i )
5149 isLine = ( size.Coord( i+1 ) <= lineTol );
5151 if ( !isLine && !isCirc && eos._edges.size() > 2 ) // Check if the EDGE is close to a circle
5157 line = new Geom_Line( gp::OX() ); // only type does matter
5161 gp_Pnt2d p = circle2d->Location();
5162 gp_Ax2 ax( gp_Pnt( p.X(), p.Y(), 0), gp::DX());
5163 circle = new Geom_Circle( ax, 1.); // only center position does matter
5172 return Handle(Geom_Curve)();
5175 //================================================================================
5177 * \brief smooth _LayerEdge's on a staight EDGE or circular EDGE
5179 //================================================================================
5181 bool _Smoother1D::smoothAnalyticEdge( _SolidData& data,
5182 Handle(ShapeAnalysis_Surface)& surface,
5183 const TopoDS_Face& F,
5184 SMESH_MesherHelper& helper)
5186 if ( !isAnalytic() ) return false;
5188 const size_t iFrom = 0, iTo = _eos._edges.size();
5190 if ( _anaCurve->IsKind( STANDARD_TYPE( Geom_Line )))
5192 if ( F.IsNull() ) // 3D
5194 SMESH_TNodeXYZ p0 ( _eos._edges[iFrom]->_2neibors->tgtNode(0) );
5195 SMESH_TNodeXYZ p1 ( _eos._edges[iTo-1]->_2neibors->tgtNode(1) );
5196 SMESH_TNodeXYZ pSrc0( _eos._edges[iFrom]->_2neibors->srcNode(0) );
5197 SMESH_TNodeXYZ pSrc1( _eos._edges[iTo-1]->_2neibors->srcNode(1) );
5199 for ( size_t i = iFrom; i < iTo; ++i )
5201 if ( _eos._edges[i]->Is( _LayerEdge::BLOCKED )) continue;
5203 _LayerEdge* edge = _eos._edges[i];
5204 SMDS_MeshNode* tgtNode = const_cast<SMDS_MeshNode*>( edge->_nodes.back() );
5205 newPos = p0 * ( 1. - _leParams[i] ) + p1 * _leParams[i];
5207 if ( _eos._edges[i]->Is( _LayerEdge::NORMAL_UPDATED ))
5209 gp_XYZ curPos = SMESH_TNodeXYZ ( tgtNode );
5210 gp_XYZ lineDir = pSrc1 - pSrc0;
5211 double shift = ( lineDir * ( newPos - pSrc0 ) -
5212 lineDir * ( curPos - pSrc0 ));
5213 newPos = curPos + lineDir * shift / lineDir.SquareModulus();
5215 edge->_pos.back() = newPos;
5216 tgtNode->setXYZ( newPos.X(), newPos.Y(), newPos.Z() );
5217 dumpMove( tgtNode );
5222 _LayerEdge* e0 = getLEdgeOnV( 0 );
5223 _LayerEdge* e1 = getLEdgeOnV( 1 );
5224 gp_XY uv0 = e0->LastUV( F, *data.GetShapeEdges( e0 ));
5225 gp_XY uv1 = e1->LastUV( F, *data.GetShapeEdges( e1 ));
5226 if ( e0->_nodes.back() == e1->_nodes.back() ) // closed edge
5228 int iPeriodic = helper.GetPeriodicIndex();
5229 if ( iPeriodic == 1 || iPeriodic == 2 )
5231 uv1.SetCoord( iPeriodic, helper.GetOtherParam( uv1.Coord( iPeriodic )));
5232 if ( uv0.Coord( iPeriodic ) > uv1.Coord( iPeriodic ))
5233 std::swap( uv0, uv1 );
5236 const gp_XY rangeUV = uv1 - uv0;
5237 for ( size_t i = iFrom; i < iTo; ++i )
5239 if ( _eos._edges[i]->Is( _LayerEdge::BLOCKED )) continue;
5240 gp_XY newUV = uv0 + _leParams[i] * rangeUV;
5241 _eos._edges[i]->_pos.back().SetCoord( newUV.X(), newUV.Y(), 0 );
5243 gp_Pnt newPos = surface->Value( newUV.X(), newUV.Y() );
5244 SMDS_MeshNode* tgtNode = const_cast<SMDS_MeshNode*>( _eos._edges[i]->_nodes.back() );
5245 tgtNode->setXYZ( newPos.X(), newPos.Y(), newPos.Z() );
5246 dumpMove( tgtNode );
5248 SMDS_FacePosition* pos = static_cast<SMDS_FacePosition*>( tgtNode->GetPosition() );
5249 pos->SetUParameter( newUV.X() );
5250 pos->SetVParameter( newUV.Y() );
5256 if ( _anaCurve->IsKind( STANDARD_TYPE( Geom_Circle )))
5258 Handle(Geom_Circle) circle = Handle(Geom_Circle)::DownCast( _anaCurve );
5259 gp_Pnt center3D = circle->Location();
5261 if ( F.IsNull() ) // 3D
5263 if ( getLEdgeOnV( 0 )->_nodes.back() == getLEdgeOnV( 1 )->_nodes.back() )
5264 return true; // closed EDGE - nothing to do
5266 // circle is a real curve of EDGE
5267 gp_Circ circ = circle->Circ();
5269 // new center is shifted along its axis
5270 const gp_Dir& axis = circ.Axis().Direction();
5271 _LayerEdge* e0 = getLEdgeOnV(0);
5272 _LayerEdge* e1 = getLEdgeOnV(1);
5273 SMESH_TNodeXYZ p0 = e0->_nodes.back();
5274 SMESH_TNodeXYZ p1 = e1->_nodes.back();
5275 double shift1 = axis.XYZ() * ( p0 - center3D.XYZ() );
5276 double shift2 = axis.XYZ() * ( p1 - center3D.XYZ() );
5277 gp_Pnt newCenter = center3D.XYZ() + axis.XYZ() * 0.5 * ( shift1 + shift2 );
5279 double newRadius = 0.5 * ( newCenter.Distance( p0 ) + newCenter.Distance( p1 ));
5281 gp_Ax2 newAxis( newCenter, axis, gp_Vec( newCenter, p0 ));
5282 gp_Circ newCirc( newAxis, newRadius );
5283 gp_Vec vecC1 ( newCenter, p1 );
5285 double uLast = newAxis.XDirection().AngleWithRef( vecC1, newAxis.Direction() ); // -PI - +PI
5289 for ( size_t i = iFrom; i < iTo; ++i )
5291 if ( _eos._edges[i]->Is( _LayerEdge::BLOCKED )) continue;
5292 double u = uLast * _leParams[i];
5293 gp_Pnt p = ElCLib::Value( u, newCirc );
5294 _eos._edges[i]->_pos.back() = p.XYZ();
5296 SMDS_MeshNode* tgtNode = const_cast<SMDS_MeshNode*>( _eos._edges[i]->_nodes.back() );
5297 tgtNode->setXYZ( p.X(), p.Y(), p.Z() );
5298 dumpMove( tgtNode );
5304 const gp_XY center( center3D.X(), center3D.Y() );
5306 _LayerEdge* e0 = getLEdgeOnV(0);
5307 _LayerEdge* eM = _eos._edges[ 0 ];
5308 _LayerEdge* e1 = getLEdgeOnV(1);
5309 gp_XY uv0 = e0->LastUV( F, *data.GetShapeEdges( e0 ) );
5310 gp_XY uvM = eM->LastUV( F, *data.GetShapeEdges( eM ) );
5311 gp_XY uv1 = e1->LastUV( F, *data.GetShapeEdges( e1 ) );
5312 gp_Vec2d vec0( center, uv0 );
5313 gp_Vec2d vecM( center, uvM );
5314 gp_Vec2d vec1( center, uv1 );
5315 double uLast = vec0.Angle( vec1 ); // -PI - +PI
5316 double uMidl = vec0.Angle( vecM );
5317 if ( uLast * uMidl <= 0. )
5318 uLast += ( uMidl > 0 ? +2. : -2. ) * M_PI;
5319 const double radius = 0.5 * ( vec0.Magnitude() + vec1.Magnitude() );
5321 gp_Ax2d axis( center, vec0 );
5322 gp_Circ2d circ( axis, radius );
5323 for ( size_t i = iFrom; i < iTo; ++i )
5325 if ( _eos._edges[i]->Is( _LayerEdge::BLOCKED )) continue;
5326 double newU = uLast * _leParams[i];
5327 gp_Pnt2d newUV = ElCLib::Value( newU, circ );
5328 _eos._edges[i]->_pos.back().SetCoord( newUV.X(), newUV.Y(), 0 );
5330 gp_Pnt newPos = surface->Value( newUV.X(), newUV.Y() );
5331 SMDS_MeshNode* tgtNode = const_cast<SMDS_MeshNode*>( _eos._edges[i]->_nodes.back() );
5332 tgtNode->setXYZ( newPos.X(), newPos.Y(), newPos.Z() );
5333 dumpMove( tgtNode );
5335 SMDS_FacePosition* pos = static_cast<SMDS_FacePosition*>( tgtNode->GetPosition() );
5336 pos->SetUParameter( newUV.X() );
5337 pos->SetVParameter( newUV.Y() );
5346 //================================================================================
5348 * \brief smooth _LayerEdge's on a an EDGE
5350 //================================================================================
5352 bool _Smoother1D::smoothComplexEdge( _SolidData& data,
5353 Handle(ShapeAnalysis_Surface)& surface,
5354 const TopoDS_Face& F,
5355 SMESH_MesherHelper& helper)
5357 if ( _offPoints.empty() )
5360 // move _offPoints to a new position
5362 _LayerEdge* e[2] = { getLEdgeOnV(0), getLEdgeOnV(1) };
5363 if ( e[0]->Is( _LayerEdge::NORMAL_UPDATED )) setNormalOnV( 0, helper );
5364 if ( e[1]->Is( _LayerEdge::NORMAL_UPDATED )) setNormalOnV( 1, helper );
5365 _leOnV[0]._len = e[0]->_len;
5366 _leOnV[1]._len = e[1]->_len;
5367 for ( size_t i = 0; i < _offPoints.size(); i++ )
5369 _LayerEdge* e0 = _offPoints[i]._2edges._edges[0];
5370 _LayerEdge* e1 = _offPoints[i]._2edges._edges[1];
5371 const double w0 = _offPoints[i]._2edges._wgt[0];
5372 const double w1 = _offPoints[i]._2edges._wgt[1];
5373 gp_XYZ avgNorm = ( e0->_normal * w0 + e1->_normal * w1 ).Normalized();
5374 double avgLen = ( e0->_len * w0 + e1->_len * w1 );
5375 double avgFact = ( e0->_lenFactor * w0 + e1->_lenFactor * w1 );
5377 _offPoints[i]._xyz += avgNorm * ( avgLen - _offPoints[i]._len ) * avgFact;
5378 _offPoints[i]._len = avgLen;
5382 if ( !surface.IsNull() ) // project _offPoints to the FACE
5384 fTol = 100 * BRep_Tool::Tolerance( F );
5385 //const double segLen = _offPoints[0].Distance( _offPoints[1] );
5387 gp_Pnt2d uv = surface->ValueOfUV( _offPoints[0]._xyz, fTol );
5388 //if ( surface->Gap() < 0.5 * segLen )
5389 _offPoints[0]._xyz = surface->Value( uv ).XYZ();
5391 for ( size_t i = 1; i < _offPoints.size(); ++i )
5393 uv = surface->NextValueOfUV( uv, _offPoints[i]._xyz, fTol );
5394 //if ( surface->Gap() < 0.5 * segLen )
5395 _offPoints[i]._xyz = surface->Value( uv ).XYZ();
5399 // project tgt nodes of extreme _LayerEdge's to the offset segments
5401 gp_Pnt pExtreme[2], pProj[2];
5402 for ( int is2nd = 0; is2nd < 2; ++is2nd )
5404 pExtreme[ is2nd ] = SMESH_TNodeXYZ( e[is2nd]->_nodes.back() );
5405 int i = _iSeg[ is2nd ];
5406 int di = is2nd ? -1 : +1;
5407 bool projected = false;
5408 double uOnSeg, uOnSegDiff, uOnSegBestDiff = Precision::Infinite();
5410 gp_Vec v0p( _offPoints[i]._xyz, pExtreme[ is2nd ] );
5411 gp_Vec v01( _offPoints[i]._xyz, _offPoints[i+1]._xyz );
5412 uOnSeg = ( v0p * v01 ) / v01.SquareMagnitude();
5413 uOnSegDiff = Abs( uOnSeg - 0.5 );
5414 projected = ( uOnSegDiff <= 0.5 );
5415 if ( uOnSegDiff < uOnSegBestDiff )
5418 pProj[ is2nd ] = _offPoints[i]._xyz + ( v01 * uOnSeg ).XYZ();
5419 uOnSegBestDiff = uOnSegDiff;
5423 while ( !projected &&
5424 i >= 0 && i+1 < (int)_offPoints.size() );
5428 if (( is2nd && _iSeg[1] != _offPoints.size()-2 ) || ( !is2nd && _iSeg[0] != 0 ))
5431 _iSeg[1] = _offPoints.size()-2;
5432 debugMsg( "smoothComplexEdge() failed to project nodes of extreme _LayerEdge's" );
5437 if ( _iSeg[0] > _iSeg[1] )
5439 debugMsg( "smoothComplexEdge() incorrectly projected nodes of extreme _LayerEdge's" );
5443 // compute normalized length of the offset segments located between the projections
5445 size_t iSeg = 0, nbSeg = _iSeg[1] - _iSeg[0] + 1;
5446 vector< double > len( nbSeg + 1 );
5448 len[ iSeg++ ] = pProj[ 0 ].Distance( _offPoints[ _iSeg[0]+1 ]._xyz );
5449 for ( size_t i = _iSeg[0]+1; i <= _iSeg[1]; ++i, ++iSeg )
5451 len[ iSeg ] = len[ iSeg-1 ] + _offPoints[i].Distance( _offPoints[i+1] );
5453 len[ nbSeg ] -= pProj[ 1 ].Distance( _offPoints[ _iSeg[1]+1 ]._xyz );
5455 double d0 = pProj[0].Distance( pExtreme[0]);
5456 double d1 = pProj[1].Distance( pExtreme[1]);
5457 double fullLen = len.back() - d0 - d1;
5458 for ( iSeg = 0; iSeg < len.size(); ++iSeg )
5459 len[iSeg] = ( len[iSeg] - d0 ) / fullLen;
5461 // temporary replace extreme _offPoints by pExtreme
5462 gp_XYZ op[2] = { _offPoints[ _iSeg[0] ]._xyz,
5463 _offPoints[ _iSeg[1]+1 ]._xyz };
5464 _offPoints[ _iSeg[0] ]._xyz = pExtreme[0].XYZ();
5465 _offPoints[ _iSeg[1]+ 1]._xyz = pExtreme[1].XYZ();
5467 // distribute tgt nodes of _LayerEdge's between the projections
5470 for ( size_t i = 0; i < _eos._edges.size(); ++i )
5472 if ( _eos._edges[i]->Is( _LayerEdge::BLOCKED )) continue;
5473 while ( iSeg+2 < len.size() && _leParams[i] > len[ iSeg+1 ] )
5475 double r = ( _leParams[i] - len[ iSeg ]) / ( len[ iSeg+1 ] - len[ iSeg ]);
5476 gp_XYZ p = ( _offPoints[ iSeg + _iSeg[0] ]._xyz * ( 1 - r ) +
5477 _offPoints[ iSeg + _iSeg[0] + 1 ]._xyz * r );
5479 if ( surface.IsNull() )
5481 _eos._edges[i]->_pos.back() = p;
5483 else // project a new node position to a FACE
5485 gp_Pnt2d uv ( _eos._edges[i]->_pos.back().X(), _eos._edges[i]->_pos.back().Y() );
5486 gp_Pnt2d uv2( surface->NextValueOfUV( uv, p, fTol ));
5488 p = surface->Value( uv2 ).XYZ();
5489 _eos._edges[i]->_pos.back().SetCoord( uv2.X(), uv2.Y(), 0 );
5491 SMDS_MeshNode* tgtNode = const_cast<SMDS_MeshNode*>( _eos._edges[i]->_nodes.back() );
5492 tgtNode->setXYZ( p.X(), p.Y(), p.Z() );
5493 dumpMove( tgtNode );
5496 _offPoints[ _iSeg[0] ]._xyz = op[0];
5497 _offPoints[ _iSeg[1]+1 ]._xyz = op[1];
5502 //================================================================================
5504 * \brief Prepare for smoothing
5506 //================================================================================
5508 void _Smoother1D::prepare(_SolidData& data)
5510 // sort _LayerEdge's by position on the EDGE
5511 const TopoDS_Edge& E = TopoDS::Edge( _eos._shape );
5512 data.SortOnEdge( E, _eos._edges );
5514 // compute normalized param of _eos._edges on EDGE
5515 _leParams.resize( _eos._edges.size() + 1 );
5517 double curLen, prevLen = _leParams[0] = 1.0;
5518 gp_Pnt pPrev = SMESH_TNodeXYZ( getLEdgeOnV( 0 )->_nodes[0] );
5520 for ( size_t i = 0; i < _eos._edges.size(); ++i )
5522 gp_Pnt p = SMESH_TNodeXYZ( _eos._edges[i]->_nodes[0] );
5523 //curLen = prevLen * _eos._edges[i]->_2neibors->_wgt[1] / _eos._edges[i]->_2neibors->_wgt[0];
5524 curLen = p.Distance( pPrev );
5525 _leParams[i+1] = _leParams[i] + curLen;
5529 double fullLen = _leParams.back() + pPrev.Distance( SMESH_TNodeXYZ( getLEdgeOnV(1)->_nodes[0]));
5530 for ( size_t i = 0; i < _leParams.size(); ++i )
5531 _leParams[i] = _leParams[i+1] / fullLen;
5537 // divide E to have offset segments with low deflection
5538 BRepAdaptor_Curve c3dAdaptor( E );
5539 const double curDeflect = 0.1; //0.3; // 0.01; // Curvature deflection
5540 const double angDeflect = 0.1; //0.2; // 0.09; // Angular deflection
5541 GCPnts_TangentialDeflection discret(c3dAdaptor, angDeflect, curDeflect);
5542 if ( discret.NbPoints() <= 2 )
5544 _anaCurve = new Geom_Line( gp::OX() ); // only type does matter
5548 const double edgeLen = SMESH_Algo::EdgeLength( E );
5549 const double u0 = c3dAdaptor.FirstParameter();
5550 _offPoints.resize( discret.NbPoints() );
5551 for ( size_t i = 0; i < _offPoints.size(); i++ )
5553 _offPoints[i]._xyz = discret.Value( i+1 ).XYZ();
5554 // use OffPnt::_len to TEMPORARY store normalized param of an offset point
5555 double u = discret.Parameter( i+1 );
5556 _offPoints[i]._len = GCPnts_AbscissaPoint::Length( c3dAdaptor, u0, u ) / edgeLen;
5559 _LayerEdge* leOnV[2] = { getLEdgeOnV(0), getLEdgeOnV(1) };
5562 _offPoints [0]._2edges.set( &_leOnV[0], &_leOnV[0], 0.5, 0.5 );
5563 _offPoints.back()._2edges.set( &_leOnV[1], &_leOnV[1], 0.5, 0.5 );
5564 _2NearEdges tmp2edges;
5565 tmp2edges._edges[1] = _eos._edges[0];
5566 _leOnV[0]._2neibors = & tmp2edges;
5567 _leOnV[0]._nodes = leOnV[0]->_nodes;
5568 _leOnV[1]._nodes = leOnV[1]->_nodes;
5569 _LayerEdge* eNext, *ePrev = & _leOnV[0];
5570 for ( size_t iLE = 0, i = 1; i < _offPoints.size()-1; i++ )
5572 // find _LayerEdge's located before and after an offset point
5573 // (_eos._edges[ iLE ] is next after ePrev)
5574 while ( iLE < _eos._edges.size() && _offPoints[i]._len > _leParams[ iLE ] )
5575 ePrev = _eos._edges[ iLE++ ];
5576 eNext = ePrev->_2neibors->_edges[1];
5578 gp_Pnt p0 = SMESH_TNodeXYZ( ePrev->_nodes[0] );
5579 gp_Pnt p1 = SMESH_TNodeXYZ( eNext->_nodes[0] );
5580 double r = p0.Distance( _offPoints[i]._xyz ) / p0.Distance( p1 );
5581 _offPoints[i]._2edges.set( ePrev, eNext, 1-r, r );
5584 int iLBO = _offPoints.size() - 2; // last but one
5585 _offPoints[iLBO]._2edges._edges[1] = & _leOnV[1];
5588 // TopoDS_Face face[2]; // FACEs sharing the EDGE
5589 // PShapeIteratorPtr fIt = helper.GetAncestors( _eos._shape, *helper.GetMesh(), TopAbs_FACE );
5590 // while ( const TopoDS_Shape* F = fIt->next() )
5592 // TGeomID fID = helper.GetMeshDS()->ShapeToIndex( *F );
5593 // if ( ! data._ignoreFaceIds.count( fID ))
5594 // face[ !face[0].IsNull() ] = *F;
5596 // if ( face[0].IsNull() ) return;
5597 // if ( face[1].IsNull() ) face[1] = face[0];
5601 // set _normal of _leOnV[0] and _leOnV[1] to be normal to the EDGE
5603 setNormalOnV( 0, data.GetHelper() );
5604 setNormalOnV( 1, data.GetHelper() );
5605 _leOnV[ 0 ]._len = 0;
5606 _leOnV[ 1 ]._len = 0;
5607 _leOnV[ 0 ]._lenFactor = _offPoints[1 ]._2edges._edges[1]->_lenFactor;
5608 _leOnV[ 1 ]._lenFactor = _offPoints[iLBO]._2edges._edges[0]->_lenFactor;
5611 _iSeg[1] = _offPoints.size()-2;
5613 // initialize OffPnt::_len
5614 for ( size_t i = 0; i < _offPoints.size(); ++i )
5615 _offPoints[i]._len = 0;
5617 if ( _eos._edges[0]->NbSteps() > 1 ) // already inflated several times, init _xyz
5619 _leOnV[0]._len = leOnV[0]->_len;
5620 _leOnV[1]._len = leOnV[1]->_len;
5621 for ( size_t i = 0; i < _offPoints.size(); i++ )
5623 _LayerEdge* e0 = _offPoints[i]._2edges._edges[0];
5624 _LayerEdge* e1 = _offPoints[i]._2edges._edges[1];
5625 const double w0 = _offPoints[i]._2edges._wgt[0];
5626 const double w1 = _offPoints[i]._2edges._wgt[1];
5627 double avgLen = ( e0->_len * w0 + e1->_len * w1 );
5628 gp_XYZ avgXYZ = ( SMESH_TNodeXYZ( e0->_nodes.back() ) * w0 +
5629 SMESH_TNodeXYZ( e1->_nodes.back() ) * w1 );
5630 _offPoints[i]._xyz = avgXYZ;
5631 _offPoints[i]._len = avgLen;
5636 //================================================================================
5638 * \brief set _normal of _leOnV[is2nd] to be normal to the EDGE
5640 //================================================================================
5642 void _Smoother1D::setNormalOnV( const bool is2nd,
5643 SMESH_MesherHelper& helper)
5645 _LayerEdge* leOnV = getLEdgeOnV( is2nd );
5646 const TopoDS_Edge& E = TopoDS::Edge( _eos._shape );
5647 TopoDS_Shape V = helper.GetSubShapeByNode( leOnV->_nodes[0], helper.GetMeshDS() );
5648 gp_XYZ eDir = getEdgeDir( E, TopoDS::Vertex( V ));
5649 gp_XYZ cross = leOnV->_normal ^ eDir;
5650 gp_XYZ norm = eDir ^ cross;
5651 double size = norm.Modulus();
5653 _leOnV[ is2nd ]._normal = norm / size;
5656 //================================================================================
5658 * \brief Sort _LayerEdge's by a parameter on a given EDGE
5660 //================================================================================
5662 void _SolidData::SortOnEdge( const TopoDS_Edge& E,
5663 vector< _LayerEdge* >& edges)
5665 map< double, _LayerEdge* > u2edge;
5666 for ( size_t i = 0; i < edges.size(); ++i )
5667 u2edge.insert( u2edge.end(),
5668 make_pair( _helper->GetNodeU( E, edges[i]->_nodes[0] ), edges[i] ));
5670 ASSERT( u2edge.size() == edges.size() );
5671 map< double, _LayerEdge* >::iterator u2e = u2edge.begin();
5672 for ( size_t i = 0; i < edges.size(); ++i, ++u2e )
5673 edges[i] = u2e->second;
5675 Sort2NeiborsOnEdge( edges );
5678 //================================================================================
5680 * \brief Set _2neibors according to the order of _LayerEdge on EDGE
5682 //================================================================================
5684 void _SolidData::Sort2NeiborsOnEdge( vector< _LayerEdge* >& edges )
5686 if ( edges.size() < 2 || !edges[0]->_2neibors ) return;
5688 for ( size_t i = 0; i < edges.size()-1; ++i )
5689 if ( edges[i]->_2neibors->tgtNode(1) != edges[i+1]->_nodes.back() )
5690 edges[i]->_2neibors->reverse();
5692 const size_t iLast = edges.size() - 1;
5693 if ( edges.size() > 1 &&
5694 edges[iLast]->_2neibors->tgtNode(0) != edges[iLast-1]->_nodes.back() )
5695 edges[iLast]->_2neibors->reverse();
5698 //================================================================================
5700 * \brief Return _EdgesOnShape* corresponding to the shape
5702 //================================================================================
5704 _EdgesOnShape* _SolidData::GetShapeEdges(const TGeomID shapeID )
5706 if ( shapeID < (int)_edgesOnShape.size() &&
5707 _edgesOnShape[ shapeID ]._shapeID == shapeID )
5708 return _edgesOnShape[ shapeID ]._subMesh ? & _edgesOnShape[ shapeID ] : 0;
5710 for ( size_t i = 0; i < _edgesOnShape.size(); ++i )
5711 if ( _edgesOnShape[i]._shapeID == shapeID )
5712 return _edgesOnShape[i]._subMesh ? & _edgesOnShape[i] : 0;
5717 //================================================================================
5719 * \brief Return _EdgesOnShape* corresponding to the shape
5721 //================================================================================
5723 _EdgesOnShape* _SolidData::GetShapeEdges(const TopoDS_Shape& shape )
5725 SMESHDS_Mesh* meshDS = _proxyMesh->GetMesh()->GetMeshDS();
5726 return GetShapeEdges( meshDS->ShapeToIndex( shape ));
5729 //================================================================================
5731 * \brief Prepare data of the _LayerEdge for smoothing on FACE
5733 //================================================================================
5735 void _SolidData::PrepareEdgesToSmoothOnFace( _EdgesOnShape* eos, bool substituteSrcNodes )
5737 SMESH_MesherHelper helper( *_proxyMesh->GetMesh() );
5739 set< TGeomID > vertices;
5741 if ( eos->ShapeType() == TopAbs_FACE )
5743 // check FACE concavity and get concave VERTEXes
5744 F = TopoDS::Face( eos->_shape );
5745 if ( isConcave( F, helper, &vertices ))
5746 _concaveFaces.insert( eos->_shapeID );
5748 // set eos._eosConcaVer
5749 eos->_eosConcaVer.clear();
5750 eos->_eosConcaVer.reserve( vertices.size() );
5751 for ( set< TGeomID >::iterator v = vertices.begin(); v != vertices.end(); ++v )
5753 _EdgesOnShape* eov = GetShapeEdges( *v );
5754 if ( eov && eov->_edges.size() == 1 )
5756 eos->_eosConcaVer.push_back( eov );
5757 for ( size_t i = 0; i < eov->_edges[0]->_neibors.size(); ++i )
5758 eov->_edges[0]->_neibors[i]->Set( _LayerEdge::DIFFICULT );
5762 // SetSmooLen() to _LayerEdge's on FACE
5763 for ( size_t i = 0; i < eos->_edges.size(); ++i )
5765 eos->_edges[i]->SetSmooLen( Precision::Infinite() );
5767 SMESH_subMeshIteratorPtr smIt = eos->_subMesh->getDependsOnIterator(/*includeSelf=*/false);
5768 while ( smIt->more() ) // loop on sub-shapes of the FACE
5770 _EdgesOnShape* eoe = GetShapeEdges( smIt->next()->GetId() );
5771 if ( !eoe ) continue;
5773 vector<_LayerEdge*>& eE = eoe->_edges;
5774 for ( size_t iE = 0; iE < eE.size(); ++iE ) // loop on _LayerEdge's on EDGE or VERTEX
5776 if ( eE[iE]->_cosin <= theMinSmoothCosin )
5779 SMDS_ElemIteratorPtr segIt = eE[iE]->_nodes[0]->GetInverseElementIterator(SMDSAbs_Edge);
5780 while ( segIt->more() )
5782 const SMDS_MeshElement* seg = segIt->next();
5783 if ( !eos->_subMesh->DependsOn( seg->getshapeId() ))
5785 if ( seg->GetNode(0) != eE[iE]->_nodes[0] )
5786 continue; // not to check a seg twice
5787 for ( size_t iN = 0; iN < eE[iE]->_neibors.size(); ++iN )
5789 _LayerEdge* eN = eE[iE]->_neibors[iN];
5790 if ( eN->_nodes[0]->getshapeId() != eos->_shapeID )
5792 double dist = SMESH_MeshAlgos::GetDistance( seg, SMESH_TNodeXYZ( eN->_nodes[0] ));
5793 double smooLen = getSmoothingThickness( eE[iE]->_cosin, dist );
5794 eN->SetSmooLen( Min( smooLen, eN->GetSmooLen() ));
5795 eN->Set( _LayerEdge::NEAR_BOUNDARY );
5800 } // if ( eos->ShapeType() == TopAbs_FACE )
5802 for ( size_t i = 0; i < eos->_edges.size(); ++i )
5804 eos->_edges[i]->_smooFunction = 0;
5805 eos->_edges[i]->Set( _LayerEdge::TO_SMOOTH );
5807 bool isCurved = false;
5808 for ( size_t i = 0; i < eos->_edges.size(); ++i )
5810 _LayerEdge* edge = eos->_edges[i];
5812 // get simplices sorted
5813 _Simplex::SortSimplices( edge->_simplices );
5815 // smoothing function
5816 edge->ChooseSmooFunction( vertices, _n2eMap );
5819 double avgNormProj = 0, avgLen = 0;
5820 for ( size_t iS = 0; iS < edge->_simplices.size(); ++iS )
5822 _Simplex& s = edge->_simplices[iS];
5824 gp_XYZ vec = edge->_pos.back() - SMESH_TNodeXYZ( s._nPrev );
5825 avgNormProj += edge->_normal * vec;
5826 avgLen += vec.Modulus();
5827 if ( substituteSrcNodes )
5829 s._nNext = _n2eMap[ s._nNext ]->_nodes.back();
5830 s._nPrev = _n2eMap[ s._nPrev ]->_nodes.back();
5833 avgNormProj /= edge->_simplices.size();
5834 avgLen /= edge->_simplices.size();
5835 if (( edge->_curvature = _Curvature::New( avgNormProj, avgLen )))
5838 SMDS_FacePosition* fPos = dynamic_cast<SMDS_FacePosition*>( edge->_nodes[0]->GetPosition() );
5840 for ( size_t iS = 0; iS < edge->_simplices.size() && !fPos; ++iS )
5841 fPos = dynamic_cast<SMDS_FacePosition*>( edge->_simplices[iS]._nPrev->GetPosition() );
5843 edge->_curvature->_uv.SetCoord( fPos->GetUParameter(), fPos->GetVParameter() );
5847 // prepare for putOnOffsetSurface()
5848 if (( eos->ShapeType() == TopAbs_FACE ) &&
5849 ( isCurved || !eos->_eosConcaVer.empty() ))
5851 eos->_offsetSurf = helper.GetSurface( TopoDS::Face( eos->_shape ));
5852 eos->_edgeForOffset = 0;
5854 double maxCosin = -1;
5855 for ( TopExp_Explorer eExp( eos->_shape, TopAbs_EDGE ); eExp.More(); eExp.Next() )
5857 _EdgesOnShape* eoe = GetShapeEdges( eExp.Current() );
5858 if ( !eoe || eoe->_edges.empty() ) continue;
5860 vector<_LayerEdge*>& eE = eoe->_edges;
5861 _LayerEdge* e = eE[ eE.size() / 2 ];
5862 if ( e->_cosin > maxCosin )
5864 eos->_edgeForOffset = e;
5865 maxCosin = e->_cosin;
5871 //================================================================================
5873 * \brief Add faces for smoothing
5875 //================================================================================
5877 void _SolidData::AddShapesToSmooth( const set< _EdgesOnShape* >& eosToSmooth,
5878 const set< _EdgesOnShape* >* edgesNoAnaSmooth )
5880 set< _EdgesOnShape * >::const_iterator eos = eosToSmooth.begin();
5881 for ( ; eos != eosToSmooth.end(); ++eos )
5883 if ( !*eos || (*eos)->_toSmooth ) continue;
5885 (*eos)->_toSmooth = true;
5887 if ( (*eos)->ShapeType() == TopAbs_FACE )
5889 PrepareEdgesToSmoothOnFace( *eos, /*substituteSrcNodes=*/false );
5890 (*eos)->_toSmooth = true;
5894 // avoid _Smoother1D::smoothAnalyticEdge() of edgesNoAnaSmooth
5895 if ( edgesNoAnaSmooth )
5896 for ( eos = edgesNoAnaSmooth->begin(); eos != edgesNoAnaSmooth->end(); ++eos )
5898 if ( (*eos)->_edgeSmoother )
5899 (*eos)->_edgeSmoother->_anaCurve.Nullify();
5903 //================================================================================
5905 * \brief Fill data._collisionEdges
5907 //================================================================================
5909 void _ViscousBuilder::findCollisionEdges( _SolidData& data, SMESH_MesherHelper& helper )
5911 data._collisionEdges.clear();
5913 // set the full thickness of the layers to LEs
5914 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
5916 _EdgesOnShape& eos = data._edgesOnShape[iS];
5917 if ( eos._edges.empty() ) continue;
5918 if ( eos.ShapeType() != TopAbs_EDGE && eos.ShapeType() != TopAbs_VERTEX ) continue;
5920 for ( size_t i = 0; i < eos._edges.size(); ++i )
5922 if ( eos._edges[i]->Is( _LayerEdge::BLOCKED )) continue;
5923 double maxLen = eos._edges[i]->_maxLen;
5924 eos._edges[i]->_maxLen = Precision::Infinite(); // avoid blocking
5925 eos._edges[i]->SetNewLength( 1.5 * maxLen, eos, helper );
5926 eos._edges[i]->_maxLen = maxLen;
5930 // make temporary quadrangles got by extrusion of
5931 // mesh edges along _LayerEdge._normal's
5933 vector< const SMDS_MeshElement* > tmpFaces;
5935 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
5937 _EdgesOnShape& eos = data._edgesOnShape[ iS ];
5938 if ( eos.ShapeType() != TopAbs_EDGE )
5940 if ( eos._edges.empty() )
5942 _LayerEdge* edge[2] = { 0, 0 }; // LE of 2 VERTEX'es
5943 SMESH_subMeshIteratorPtr smIt = eos._subMesh->getDependsOnIterator(/*includeSelf=*/false);
5944 while ( smIt->more() )
5945 if ( _EdgesOnShape* eov = data.GetShapeEdges( smIt->next()->GetId() ))
5946 if ( eov->_edges.size() == 1 )
5947 edge[ bool( edge[0]) ] = eov->_edges[0];
5951 _TmpMeshFaceOnEdge* f = new _TmpMeshFaceOnEdge( edge[0], edge[1], --_tmpFaceID );
5952 tmpFaces.push_back( f );
5955 for ( size_t i = 0; i < eos._edges.size(); ++i )
5957 _LayerEdge* edge = eos._edges[i];
5958 for ( int j = 0; j < 2; ++j ) // loop on _2NearEdges
5960 const SMDS_MeshNode* src2 = edge->_2neibors->srcNode(j);
5961 if ( src2->GetPosition()->GetDim() > 0 &&
5962 src2->GetID() < edge->_nodes[0]->GetID() )
5963 continue; // avoid using same segment twice
5965 // a _LayerEdge containg tgt2
5966 _LayerEdge* neiborEdge = edge->_2neibors->_edges[j];
5968 _TmpMeshFaceOnEdge* f = new _TmpMeshFaceOnEdge( edge, neiborEdge, --_tmpFaceID );
5969 tmpFaces.push_back( f );
5974 // Find _LayerEdge's intersecting tmpFaces.
5976 SMDS_ElemIteratorPtr fIt( new SMDS_ElementVectorIterator( tmpFaces.begin(),
5978 SMESHUtils::Deleter<SMESH_ElementSearcher> searcher
5979 ( SMESH_MeshAlgos::GetElementSearcher( *getMeshDS(), fIt ));
5981 double dist1, dist2, segLen, eps;
5982 _CollisionEdges collEdges;
5983 vector< const SMDS_MeshElement* > suspectFaces;
5984 const double angle30 = Cos( 30. * M_PI / 180. );
5986 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
5988 _EdgesOnShape& eos = data._edgesOnShape[ iS ];
5989 if ( eos.ShapeType() == TopAbs_FACE || !eos._sWOL.IsNull() )
5991 // find sub-shapes whose VL can influence VL on eos
5992 set< TGeomID > neighborShapes;
5993 PShapeIteratorPtr fIt = helper.GetAncestors( eos._shape, *_mesh, TopAbs_FACE );
5994 while ( const TopoDS_Shape* face = fIt->next() )
5996 TGeomID faceID = getMeshDS()->ShapeToIndex( *face );
5997 if ( _EdgesOnShape* eof = data.GetShapeEdges( faceID ))
5999 SMESH_subMeshIteratorPtr subIt = eof->_subMesh->getDependsOnIterator(/*includeSelf=*/false);
6000 while ( subIt->more() )
6001 neighborShapes.insert( subIt->next()->GetId() );
6004 if ( eos.ShapeType() == TopAbs_VERTEX )
6006 PShapeIteratorPtr eIt = helper.GetAncestors( eos._shape, *_mesh, TopAbs_EDGE );
6007 while ( const TopoDS_Shape* edge = eIt->next() )
6008 neighborShapes.erase( getMeshDS()->ShapeToIndex( *edge ));
6010 // find intersecting _LayerEdge's
6011 for ( size_t i = 0; i < eos._edges.size(); ++i )
6013 _LayerEdge* edge = eos._edges[i];
6014 gp_Ax1 lastSegment = edge->LastSegment( segLen, eos );
6015 eps = 0.5 * edge->_len;
6018 gp_Vec eSegDir0, eSegDir1;
6019 if ( edge->IsOnEdge() )
6021 SMESH_TNodeXYZ eP( edge->_nodes[0] );
6022 eSegDir0 = SMESH_TNodeXYZ( edge->_2neibors->srcNode(0) ) - eP;
6023 eSegDir1 = SMESH_TNodeXYZ( edge->_2neibors->srcNode(1) ) - eP;
6025 suspectFaces.clear();
6026 searcher->GetElementsInSphere( SMESH_TNodeXYZ( edge->_nodes.back()), edge->_len,
6027 SMDSAbs_Face, suspectFaces );
6028 collEdges._intEdges.clear();
6029 for ( size_t j = 0 ; j < suspectFaces.size(); ++j )
6031 const _TmpMeshFaceOnEdge* f = (const _TmpMeshFaceOnEdge*) suspectFaces[j];
6032 if ( f->_le1 == edge || f->_le2 == edge ) continue;
6033 if ( !neighborShapes.count( f->_le1->_nodes[0]->getshapeId() )) continue;
6034 if ( !neighborShapes.count( f->_le2->_nodes[0]->getshapeId() )) continue;
6035 if ( edge->IsOnEdge() ) {
6036 if ( edge->_2neibors->include( f->_le1 ) ||
6037 edge->_2neibors->include( f->_le2 )) continue;
6040 if (( f->_le1->IsOnEdge() && f->_le1->_2neibors->include( edge )) ||
6041 ( f->_le2->IsOnEdge() && f->_le2->_2neibors->include( edge ))) continue;
6043 dist1 = dist2 = Precision::Infinite();
6044 if ( !edge->SegTriaInter( lastSegment, f->_nn[0], f->_nn[1], f->_nn[2], dist1, eps ))
6045 dist1 = Precision::Infinite();
6046 if ( !edge->SegTriaInter( lastSegment, f->_nn[3], f->_nn[2], f->_nn[0], dist2, eps ))
6047 dist2 = Precision::Infinite();
6048 if (( dist1 > segLen ) && ( dist2 > segLen ))
6051 if ( edge->IsOnEdge() )
6053 // skip perpendicular EDGEs
6054 gp_Vec fSegDir = SMESH_TNodeXYZ( f->_nn[0] ) - SMESH_TNodeXYZ( f->_nn[3] );
6055 bool isParallel = ( isLessAngle( eSegDir0, fSegDir, angle30 ) ||
6056 isLessAngle( eSegDir1, fSegDir, angle30 ) ||
6057 isLessAngle( eSegDir0, fSegDir.Reversed(), angle30 ) ||
6058 isLessAngle( eSegDir1, fSegDir.Reversed(), angle30 ));
6063 // either limit inflation of edges or remember them for updating _normal
6064 // double dot = edge->_normal * f->GetDir();
6067 collEdges._intEdges.push_back( f->_le1 );
6068 collEdges._intEdges.push_back( f->_le2 );
6072 // double shortLen = 0.75 * ( Min( dist1, dist2 ) / edge->_lenFactor );
6073 // edge->_maxLen = Min( shortLen, edge->_maxLen );
6077 if ( !collEdges._intEdges.empty() )
6079 collEdges._edge = edge;
6080 data._collisionEdges.push_back( collEdges );
6085 for ( size_t i = 0 ; i < tmpFaces.size(); ++i )
6088 // restore the zero thickness
6089 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
6091 _EdgesOnShape& eos = data._edgesOnShape[iS];
6092 if ( eos._edges.empty() ) continue;
6093 if ( eos.ShapeType() != TopAbs_EDGE && eos.ShapeType() != TopAbs_VERTEX ) continue;
6095 for ( size_t i = 0; i < eos._edges.size(); ++i )
6097 eos._edges[i]->InvalidateStep( 1, eos );
6098 eos._edges[i]->_len = 0;
6103 //================================================================================
6105 * \brief Modify normals of _LayerEdge's on EDGE's to avoid intersection with
6106 * _LayerEdge's on neighbor EDGE's
6108 //================================================================================
6110 bool _ViscousBuilder::updateNormals( _SolidData& data,
6111 SMESH_MesherHelper& helper,
6115 updateNormalsOfC1Vertices( data );
6117 if ( stepNb > 0 && !updateNormalsOfConvexFaces( data, helper, stepNb ))
6120 // map to store new _normal and _cosin for each intersected edge
6121 map< _LayerEdge*, _LayerEdge, _LayerEdgeCmp > edge2newEdge;
6122 map< _LayerEdge*, _LayerEdge, _LayerEdgeCmp >::iterator e2neIt;
6123 _LayerEdge zeroEdge;
6124 zeroEdge._normal.SetCoord( 0,0,0 );
6125 zeroEdge._maxLen = Precision::Infinite();
6126 zeroEdge._nodes.resize(1); // to init _TmpMeshFaceOnEdge
6128 set< _EdgesOnShape* > shapesToSmooth, edgesNoAnaSmooth;
6130 double segLen, dist1, dist2;
6131 vector< pair< _LayerEdge*, double > > intEdgesDist;
6132 _TmpMeshFaceOnEdge quad( &zeroEdge, &zeroEdge, 0 );
6134 for ( int iter = 0; iter < 5; ++iter )
6136 edge2newEdge.clear();
6138 for ( size_t iE = 0; iE < data._collisionEdges.size(); ++iE )
6140 _CollisionEdges& ce = data._collisionEdges[iE];
6141 _LayerEdge* edge1 = ce._edge;
6142 if ( !edge1 || edge1->Is( _LayerEdge::BLOCKED )) continue;
6143 _EdgesOnShape* eos1 = data.GetShapeEdges( edge1 );
6144 if ( !eos1 ) continue;
6146 // detect intersections
6147 gp_Ax1 lastSeg = edge1->LastSegment( segLen, *eos1 );
6148 double testLen = 1.5 * edge1->_maxLen; //2 + edge1->_len * edge1->_lenFactor;
6149 double eps = 0.5 * edge1->_len;
6150 intEdgesDist.clear();
6151 double minIntDist = Precision::Infinite();
6152 for ( size_t i = 0; i < ce._intEdges.size(); i += 2 )
6154 if ( ce._intEdges[i ]->Is( _LayerEdge::BLOCKED ) ||
6155 ce._intEdges[i+1]->Is( _LayerEdge::BLOCKED ))
6157 double dot = edge1->_normal * quad.GetDir( ce._intEdges[i], ce._intEdges[i+1] );
6158 double fact = ( 1.1 + dot * dot );
6159 SMESH_TNodeXYZ pSrc0( ce.nSrc(i) ), pSrc1( ce.nSrc(i+1) );
6160 SMESH_TNodeXYZ pTgt0( ce.nTgt(i) ), pTgt1( ce.nTgt(i+1) );
6161 gp_XYZ pLast0 = pSrc0 + ( pTgt0 - pSrc0 ) * fact;
6162 gp_XYZ pLast1 = pSrc1 + ( pTgt1 - pSrc1 ) * fact;
6163 dist1 = dist2 = Precision::Infinite();
6164 if ( !edge1->SegTriaInter( lastSeg, pSrc0, pTgt0, pSrc1, dist1, eps ) &&
6165 !edge1->SegTriaInter( lastSeg, pSrc1, pTgt1, pTgt0, dist2, eps ))
6167 if (( dist1 > testLen || dist1 < 0 ) &&
6168 ( dist2 > testLen || dist2 < 0 ))
6171 // choose a closest edge
6172 gp_Pnt intP( lastSeg.Location().XYZ() +
6173 lastSeg.Direction().XYZ() * ( Min( dist1, dist2 ) + segLen ));
6174 double d1 = intP.SquareDistance( pSrc0 );
6175 double d2 = intP.SquareDistance( pSrc1 );
6176 int iClose = i + ( d2 < d1 );
6177 _LayerEdge* edge2 = ce._intEdges[iClose];
6178 edge2->Unset( _LayerEdge::MARKED );
6180 // choose a closest edge among neighbors
6181 gp_Pnt srcP( SMESH_TNodeXYZ( edge1->_nodes[0] ));
6182 d1 = srcP.SquareDistance( SMESH_TNodeXYZ( edge2->_nodes[0] ));
6183 for ( size_t j = 0; j < intEdgesDist.size(); ++j )
6185 _LayerEdge * edgeJ = intEdgesDist[j].first;
6186 if ( edge2->IsNeiborOnEdge( edgeJ ))
6188 d2 = srcP.SquareDistance( SMESH_TNodeXYZ( edgeJ->_nodes[0] ));
6189 ( d1 < d2 ? edgeJ : edge2 )->Set( _LayerEdge::MARKED );
6192 intEdgesDist.push_back( make_pair( edge2, Min( dist1, dist2 )));
6193 // if ( Abs( d2 - d1 ) / Max( d2, d1 ) < 0.5 )
6195 // iClose = i + !( d2 < d1 );
6196 // intEdges.push_back( ce._intEdges[iClose] );
6197 // ce._intEdges[iClose]->Unset( _LayerEdge::MARKED );
6199 minIntDist = Min( edge1->_len * edge1->_lenFactor - segLen + dist1, minIntDist );
6200 minIntDist = Min( edge1->_len * edge1->_lenFactor - segLen + dist2, minIntDist );
6205 // compute new _normals
6206 for ( size_t i = 0; i < intEdgesDist.size(); ++i )
6208 _LayerEdge* edge2 = intEdgesDist[i].first;
6209 double distWgt = edge1->_len / intEdgesDist[i].second;
6210 if ( edge2->Is( _LayerEdge::MARKED )) continue;
6211 edge2->Set( _LayerEdge::MARKED );
6214 gp_XYZ dir1 = edge1->_normal, dir2 = edge2->_normal;
6216 double cos1 = Abs( edge1->_cosin ), cos2 = Abs( edge2->_cosin );
6217 double wgt1 = ( cos1 + 0.001 ) / ( cos1 + cos2 + 0.002 );
6218 double wgt2 = ( cos2 + 0.001 ) / ( cos1 + cos2 + 0.002 );
6219 // double cos1 = Abs( edge1->_cosin ), cos2 = Abs( edge2->_cosin );
6220 // double sgn1 = 0.1 * ( 1 + edge1->_cosin ), sgn2 = 0.1 * ( 1 + edge2->_cosin );
6221 // double wgt1 = ( cos1 + sgn1 ) / ( cos1 + cos2 + sgn1 + sgn2 );
6222 // double wgt2 = ( cos2 + sgn2 ) / ( cos1 + cos2 + sgn1 + sgn2 );
6223 gp_XYZ newNormal = wgt1 * dir1 + wgt2 * dir2;
6224 newNormal.Normalize();
6228 double sgn1 = edge1->_cosin / cos1, sgn2 = edge2->_cosin / cos2;
6229 if ( cos1 < theMinSmoothCosin )
6231 newCos = cos2 * sgn1;
6233 else if ( cos2 > theMinSmoothCosin ) // both cos1 and cos2 > theMinSmoothCosin
6235 newCos = ( wgt1 * cos1 + wgt2 * cos2 ) * edge1->_cosin / cos1;
6239 newCos = edge1->_cosin;
6242 e2neIt = edge2newEdge.insert( make_pair( edge1, zeroEdge )).first;
6243 e2neIt->second._normal += distWgt * newNormal;
6244 e2neIt->second._cosin = newCos;
6245 e2neIt->second._maxLen = 0.7 * minIntDist / edge1->_lenFactor;
6246 if ( iter > 0 && sgn1 * sgn2 < 0 && edge1->_cosin < 0 )
6247 e2neIt->second._normal += dir2;
6248 e2neIt = edge2newEdge.insert( make_pair( edge2, zeroEdge )).first;
6249 e2neIt->second._normal += distWgt * newNormal;
6250 e2neIt->second._cosin = edge2->_cosin;
6251 if ( iter > 0 && sgn1 * sgn2 < 0 && edge2->_cosin < 0 )
6252 e2neIt->second._normal += dir1;
6256 if ( edge2newEdge.empty() )
6257 break; //return true;
6259 dumpFunction(SMESH_Comment("updateNormals")<< data._index << "_" << stepNb << "_it" << iter);
6261 // Update data of edges depending on a new _normal
6264 for ( e2neIt = edge2newEdge.begin(); e2neIt != edge2newEdge.end(); ++e2neIt )
6266 _LayerEdge* edge = e2neIt->first;
6267 _LayerEdge& newEdge = e2neIt->second;
6268 _EdgesOnShape* eos = data.GetShapeEdges( edge );
6270 // Check if a new _normal is OK:
6271 newEdge._normal.Normalize();
6272 if ( !isNewNormalOk( data, *edge, newEdge._normal ))
6274 if ( newEdge._maxLen < edge->_len && iter > 0 ) // limit _maxLen
6276 edge->InvalidateStep( stepNb + 1, *eos, /*restoreLength=*/true );
6277 edge->_maxLen = newEdge._maxLen;
6278 edge->SetNewLength( newEdge._maxLen, *eos, helper );
6280 continue; // the new _normal is bad
6282 // the new _normal is OK
6284 // find shapes that need smoothing due to change of _normal
6285 if ( edge->_cosin < theMinSmoothCosin &&
6286 newEdge._cosin > theMinSmoothCosin )
6288 if ( eos->_sWOL.IsNull() )
6290 SMDS_ElemIteratorPtr fIt = edge->_nodes[0]->GetInverseElementIterator(SMDSAbs_Face);
6291 while ( fIt->more() )
6292 shapesToSmooth.insert( data.GetShapeEdges( fIt->next()->getshapeId() ));
6294 else // edge inflates along a FACE
6296 TopoDS_Shape V = helper.GetSubShapeByNode( edge->_nodes[0], getMeshDS() );
6297 PShapeIteratorPtr eIt = helper.GetAncestors( V, *_mesh, TopAbs_EDGE );
6298 while ( const TopoDS_Shape* E = eIt->next() )
6300 if ( !helper.IsSubShape( *E, /*FACE=*/eos->_sWOL ))
6302 gp_Vec edgeDir = getEdgeDir( TopoDS::Edge( *E ), TopoDS::Vertex( V ));
6303 double angle = edgeDir.Angle( newEdge._normal ); // [0,PI]
6304 if ( angle < M_PI / 2 )
6305 shapesToSmooth.insert( data.GetShapeEdges( *E ));
6310 double len = edge->_len;
6311 edge->InvalidateStep( stepNb + 1, *eos, /*restoreLength=*/true );
6312 edge->SetNormal( newEdge._normal );
6313 edge->SetCosin( newEdge._cosin );
6314 edge->SetNewLength( len, *eos, helper );
6315 edge->Set( _LayerEdge::MARKED );
6316 edge->Set( _LayerEdge::NORMAL_UPDATED );
6317 edgesNoAnaSmooth.insert( eos );
6320 // Update normals and other dependent data of not intersecting _LayerEdge's
6321 // neighboring the intersecting ones
6323 for ( e2neIt = edge2newEdge.begin(); e2neIt != edge2newEdge.end(); ++e2neIt )
6325 _LayerEdge* edge1 = e2neIt->first;
6326 _EdgesOnShape* eos1 = data.GetShapeEdges( edge1 );
6327 if ( !edge1->Is( _LayerEdge::MARKED ))
6330 if ( edge1->IsOnEdge() )
6332 const SMDS_MeshNode * n1 = edge1->_2neibors->srcNode(0);
6333 const SMDS_MeshNode * n2 = edge1->_2neibors->srcNode(1);
6334 edge1->SetDataByNeighbors( n1, n2, *eos1, helper );
6337 if ( !edge1->_2neibors )
6339 for ( int j = 0; j < 2; ++j ) // loop on 2 neighbors
6341 _LayerEdge* neighbor = edge1->_2neibors->_edges[j];
6342 if ( neighbor->Is( _LayerEdge::MARKED ) /*edge2newEdge.count ( neighbor )*/)
6343 continue; // j-th neighbor is also intersected
6344 _LayerEdge* prevEdge = edge1;
6345 const int nbSteps = 10;
6346 for ( int step = nbSteps; step; --step ) // step from edge1 in j-th direction
6348 if ( neighbor->Is( _LayerEdge::BLOCKED ) ||
6349 neighbor->Is( _LayerEdge::MARKED ))
6351 _EdgesOnShape* eos = data.GetShapeEdges( neighbor );
6352 if ( !eos ) continue;
6353 _LayerEdge* nextEdge = neighbor;
6354 if ( neighbor->_2neibors )
6357 nextEdge = neighbor->_2neibors->_edges[iNext];
6358 if ( nextEdge == prevEdge )
6359 nextEdge = neighbor->_2neibors->_edges[ ++iNext ];
6361 double r = double(step-1)/nbSteps;
6362 if ( !nextEdge->_2neibors )
6365 gp_XYZ newNorm = prevEdge->_normal * r + nextEdge->_normal * (1-r);
6366 newNorm.Normalize();
6367 if ( !isNewNormalOk( data, *neighbor, newNorm ))
6370 double len = neighbor->_len;
6371 neighbor->InvalidateStep( stepNb + 1, *eos, /*restoreLength=*/true );
6372 neighbor->SetNormal( newNorm );
6373 neighbor->SetCosin( prevEdge->_cosin * r + nextEdge->_cosin * (1-r) );
6374 if ( neighbor->_2neibors )
6375 neighbor->SetDataByNeighbors( prevEdge->_nodes[0], nextEdge->_nodes[0], *eos, helper );
6376 neighbor->SetNewLength( len, *eos, helper );
6377 neighbor->Set( _LayerEdge::MARKED );
6378 neighbor->Set( _LayerEdge::NORMAL_UPDATED );
6379 edgesNoAnaSmooth.insert( eos );
6381 if ( !neighbor->_2neibors )
6382 break; // neighbor is on VERTEX
6384 // goto the next neighbor
6385 prevEdge = neighbor;
6386 neighbor = nextEdge;
6393 data.AddShapesToSmooth( shapesToSmooth, &edgesNoAnaSmooth );
6398 //================================================================================
6400 * \brief Check if a new normal is OK
6402 //================================================================================
6404 bool _ViscousBuilder::isNewNormalOk( _SolidData& data,
6406 const gp_XYZ& newNormal)
6408 // check a min angle between the newNormal and surrounding faces
6409 vector<_Simplex> simplices;
6410 SMESH_TNodeXYZ n0( edge._nodes[0] ), n1, n2;
6411 _Simplex::GetSimplices( n0._node, simplices, data._ignoreFaceIds, &data );
6412 double newMinDot = 1, curMinDot = 1;
6413 for ( size_t i = 0; i < simplices.size(); ++i )
6415 n1.Set( simplices[i]._nPrev );
6416 n2.Set( simplices[i]._nNext );
6417 gp_XYZ normFace = ( n1 - n0 ) ^ ( n2 - n0 );
6418 double normLen2 = normFace.SquareModulus();
6419 if ( normLen2 < std::numeric_limits<double>::min() )
6421 normFace /= Sqrt( normLen2 );
6422 newMinDot = Min( newNormal * normFace, newMinDot );
6423 curMinDot = Min( edge._normal * normFace, curMinDot );
6425 if ( newMinDot < 0.5 )
6427 return ( newMinDot >= curMinDot * 0.9 );
6428 //return ( newMinDot >= ( curMinDot * ( 0.8 + 0.1 * edge.NbSteps() )));
6429 // double initMinDot2 = 1. - edge._cosin * edge._cosin;
6430 // return ( newMinDot * newMinDot ) >= ( 0.8 * initMinDot2 );
6435 //================================================================================
6437 * \brief Modify normals of _LayerEdge's on FACE to reflex smoothing
6439 //================================================================================
6441 bool _ViscousBuilder::updateNormalsOfSmoothed( _SolidData& data,
6442 SMESH_MesherHelper& helper,
6444 const double stepSize )
6446 if ( data._nbShapesToSmooth == 0 || nbSteps == 0 )
6447 return true; // no shapes needing smoothing
6449 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
6451 _EdgesOnShape& eos = data._edgesOnShape[ iS ];
6452 if ( //!eos._toSmooth || _eosC1 have _toSmooth == false
6453 !eos._hyp.ToSmooth() ||
6454 eos.ShapeType() != TopAbs_FACE ||
6455 eos._edges.empty() )
6458 bool toSmooth = ( eos._edges[ 0 ]->NbSteps() >= nbSteps+1 );
6459 if ( !toSmooth ) continue;
6461 for ( size_t i = 0; i < eos._edges.size(); ++i )
6463 _LayerEdge* edge = eos._edges[i];
6464 if ( !edge->Is( _LayerEdge::SMOOTHED ))
6466 if ( edge->Is( _LayerEdge::DIFFICULT ) && nbSteps != 1 )
6469 const gp_XYZ& pPrev = edge->PrevPos();
6470 const gp_XYZ& pLast = edge->_pos.back();
6471 gp_XYZ stepVec = pLast - pPrev;
6472 double realStepSize = stepVec.Modulus();
6473 if ( realStepSize < numeric_limits<double>::min() )
6476 edge->_lenFactor = realStepSize / stepSize;
6477 edge->_normal = stepVec / realStepSize;
6478 edge->Set( _LayerEdge::NORMAL_UPDATED );
6485 //================================================================================
6487 * \brief Modify normals of _LayerEdge's on C1 VERTEXes
6489 //================================================================================
6491 void _ViscousBuilder::updateNormalsOfC1Vertices( _SolidData& data )
6493 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
6495 _EdgesOnShape& eov = data._edgesOnShape[ iS ];
6496 if ( eov._eosC1.empty() ||
6497 eov.ShapeType() != TopAbs_VERTEX ||
6498 eov._edges.empty() )
6501 gp_XYZ newNorm = eov._edges[0]->_normal;
6502 double curThick = eov._edges[0]->_len * eov._edges[0]->_lenFactor;
6503 bool normChanged = false;
6505 for ( size_t i = 0; i < eov._eosC1.size(); ++i )
6507 _EdgesOnShape* eoe = eov._eosC1[i];
6508 const TopoDS_Edge& e = TopoDS::Edge( eoe->_shape );
6509 const double eLen = SMESH_Algo::EdgeLength( e );
6510 TopoDS_Shape oppV = SMESH_MesherHelper::IthVertex( 0, e );
6511 if ( oppV.IsSame( eov._shape ))
6512 oppV = SMESH_MesherHelper::IthVertex( 1, e );
6513 _EdgesOnShape* eovOpp = data.GetShapeEdges( oppV );
6514 if ( !eovOpp || eovOpp->_edges.empty() ) continue;
6516 double curThickOpp = eovOpp->_edges[0]->_len * eovOpp->_edges[0]->_lenFactor;
6517 if ( curThickOpp + curThick < eLen )
6520 double wgt = 2. * curThick / eLen;
6521 newNorm += wgt * eovOpp->_edges[0]->_normal;
6526 eov._edges[0]->SetNormal( newNorm.Normalized() );
6527 eov._edges[0]->Set( _LayerEdge::NORMAL_UPDATED );
6532 //================================================================================
6534 * \brief Modify normals of _LayerEdge's on _ConvexFace's
6536 //================================================================================
6538 bool _ViscousBuilder::updateNormalsOfConvexFaces( _SolidData& data,
6539 SMESH_MesherHelper& helper,
6542 SMESHDS_Mesh* meshDS = helper.GetMeshDS();
6545 map< TGeomID, _ConvexFace >::iterator id2face = data._convexFaces.begin();
6546 for ( ; id2face != data._convexFaces.end(); ++id2face )
6548 _ConvexFace & convFace = (*id2face).second;
6549 if ( convFace._normalsFixed )
6550 continue; // already fixed
6551 if ( convFace.CheckPrisms() )
6552 continue; // nothing to fix
6554 convFace._normalsFixed = true;
6556 BRepAdaptor_Surface surface ( convFace._face, false );
6557 BRepLProp_SLProps surfProp( surface, 2, 1e-6 );
6559 // check if the convex FACE is of spherical shape
6561 Bnd_B3d centersBox; // bbox of centers of curvature of _LayerEdge's on VERTEXes
6565 map< TGeomID, _EdgesOnShape* >::iterator id2eos = convFace._subIdToEOS.begin();
6566 for ( ; id2eos != convFace._subIdToEOS.end(); ++id2eos )
6568 _EdgesOnShape& eos = *(id2eos->second);
6569 if ( eos.ShapeType() == TopAbs_VERTEX )
6571 _LayerEdge* ledge = eos._edges[ 0 ];
6572 if ( convFace.GetCenterOfCurvature( ledge, surfProp, helper, center ))
6573 centersBox.Add( center );
6575 for ( size_t i = 0; i < eos._edges.size(); ++i )
6576 nodesBox.Add( SMESH_TNodeXYZ( eos._edges[ i ]->_nodes[0] ));
6578 if ( centersBox.IsVoid() )
6580 debugMsg( "Error: centersBox.IsVoid()" );
6583 const bool isSpherical =
6584 ( centersBox.SquareExtent() < 1e-6 * nodesBox.SquareExtent() );
6586 int nbEdges = helper.Count( convFace._face, TopAbs_EDGE, /*ignoreSame=*/false );
6587 vector < _CentralCurveOnEdge > centerCurves( nbEdges );
6591 // set _LayerEdge::_normal as average of all normals
6593 // WARNING: different density of nodes on EDGEs is not taken into account that
6594 // can lead to an improper new normal
6596 gp_XYZ avgNormal( 0,0,0 );
6598 id2eos = convFace._subIdToEOS.begin();
6599 for ( ; id2eos != convFace._subIdToEOS.end(); ++id2eos )
6601 _EdgesOnShape& eos = *(id2eos->second);
6602 // set data of _CentralCurveOnEdge
6603 if ( eos.ShapeType() == TopAbs_EDGE )
6605 _CentralCurveOnEdge& ceCurve = centerCurves[ nbEdges++ ];
6606 ceCurve.SetShapes( TopoDS::Edge( eos._shape ), convFace, data, helper );
6607 if ( !eos._sWOL.IsNull() )
6608 ceCurve._adjFace.Nullify();
6610 ceCurve._ledges.insert( ceCurve._ledges.end(),
6611 eos._edges.begin(), eos._edges.end());
6613 // summarize normals
6614 for ( size_t i = 0; i < eos._edges.size(); ++i )
6615 avgNormal += eos._edges[ i ]->_normal;
6617 double normSize = avgNormal.SquareModulus();
6618 if ( normSize < 1e-200 )
6620 debugMsg( "updateNormalsOfConvexFaces(): zero avgNormal" );
6623 avgNormal /= Sqrt( normSize );
6625 // compute new _LayerEdge::_cosin on EDGEs
6626 double avgCosin = 0;
6629 for ( size_t iE = 0; iE < centerCurves.size(); ++iE )
6631 _CentralCurveOnEdge& ceCurve = centerCurves[ iE ];
6632 if ( ceCurve._adjFace.IsNull() )
6634 for ( size_t iLE = 0; iLE < ceCurve._ledges.size(); ++iLE )
6636 const SMDS_MeshNode* node = ceCurve._ledges[ iLE ]->_nodes[0];
6637 inFaceDir = getFaceDir( ceCurve._adjFace, ceCurve._edge, node, helper, isOK );
6640 double angle = inFaceDir.Angle( avgNormal ); // [0,PI]
6641 ceCurve._ledges[ iLE ]->_cosin = Cos( angle );
6642 avgCosin += ceCurve._ledges[ iLE ]->_cosin;
6648 avgCosin /= nbCosin;
6650 // set _LayerEdge::_normal = avgNormal
6651 id2eos = convFace._subIdToEOS.begin();
6652 for ( ; id2eos != convFace._subIdToEOS.end(); ++id2eos )
6654 _EdgesOnShape& eos = *(id2eos->second);
6655 if ( eos.ShapeType() != TopAbs_EDGE )
6656 for ( size_t i = 0; i < eos._edges.size(); ++i )
6657 eos._edges[ i ]->_cosin = avgCosin;
6659 for ( size_t i = 0; i < eos._edges.size(); ++i )
6661 eos._edges[ i ]->SetNormal( avgNormal );
6662 eos._edges[ i ]->Set( _LayerEdge::NORMAL_UPDATED );
6666 else // if ( isSpherical )
6668 // We suppose that centers of curvature at all points of the FACE
6669 // lie on some curve, let's call it "central curve". For all _LayerEdge's
6670 // having a common center of curvature we define the same new normal
6671 // as a sum of normals of _LayerEdge's on EDGEs among them.
6673 // get all centers of curvature for each EDGE
6675 helper.SetSubShape( convFace._face );
6676 _LayerEdge* vertexLEdges[2], **edgeLEdge, **edgeLEdgeEnd;
6678 TopExp_Explorer edgeExp( convFace._face, TopAbs_EDGE );
6679 for ( int iE = 0; edgeExp.More(); edgeExp.Next(), ++iE )
6681 const TopoDS_Edge& edge = TopoDS::Edge( edgeExp.Current() );
6683 // set adjacent FACE
6684 centerCurves[ iE ].SetShapes( edge, convFace, data, helper );
6686 // get _LayerEdge's of the EDGE
6687 TGeomID edgeID = meshDS->ShapeToIndex( edge );
6688 _EdgesOnShape* eos = data.GetShapeEdges( edgeID );
6689 if ( !eos || eos->_edges.empty() )
6691 // no _LayerEdge's on EDGE, use _LayerEdge's on VERTEXes
6692 for ( int iV = 0; iV < 2; ++iV )
6694 TopoDS_Vertex v = helper.IthVertex( iV, edge );
6695 TGeomID vID = meshDS->ShapeToIndex( v );
6696 eos = data.GetShapeEdges( vID );
6697 vertexLEdges[ iV ] = eos->_edges[ 0 ];
6699 edgeLEdge = &vertexLEdges[0];
6700 edgeLEdgeEnd = edgeLEdge + 2;
6702 centerCurves[ iE ]._adjFace.Nullify();
6706 if ( ! eos->_toSmooth )
6707 data.SortOnEdge( edge, eos->_edges );
6708 edgeLEdge = &eos->_edges[ 0 ];
6709 edgeLEdgeEnd = edgeLEdge + eos->_edges.size();
6710 vertexLEdges[0] = eos->_edges.front()->_2neibors->_edges[0];
6711 vertexLEdges[1] = eos->_edges.back() ->_2neibors->_edges[1];
6713 if ( ! eos->_sWOL.IsNull() )
6714 centerCurves[ iE ]._adjFace.Nullify();
6717 // Get curvature centers
6721 if ( edgeLEdge[0]->IsOnEdge() &&
6722 convFace.GetCenterOfCurvature( vertexLEdges[0], surfProp, helper, center ))
6724 centerCurves[ iE ].Append( center, vertexLEdges[0] );
6725 centersBox.Add( center );
6727 for ( ; edgeLEdge < edgeLEdgeEnd; ++edgeLEdge )
6728 if ( convFace.GetCenterOfCurvature( *edgeLEdge, surfProp, helper, center ))
6729 { // EDGE or VERTEXes
6730 centerCurves[ iE ].Append( center, *edgeLEdge );
6731 centersBox.Add( center );
6733 if ( edgeLEdge[-1]->IsOnEdge() &&
6734 convFace.GetCenterOfCurvature( vertexLEdges[1], surfProp, helper, center ))
6736 centerCurves[ iE ].Append( center, vertexLEdges[1] );
6737 centersBox.Add( center );
6739 centerCurves[ iE ]._isDegenerated =
6740 ( centersBox.IsVoid() || centersBox.SquareExtent() < 1e-6 * nodesBox.SquareExtent() );
6742 } // loop on EDGES of convFace._face to set up data of centerCurves
6744 // Compute new normals for _LayerEdge's on EDGEs
6746 double avgCosin = 0;
6749 for ( size_t iE1 = 0; iE1 < centerCurves.size(); ++iE1 )
6751 _CentralCurveOnEdge& ceCurve = centerCurves[ iE1 ];
6752 if ( ceCurve._isDegenerated )
6754 const vector< gp_Pnt >& centers = ceCurve._curvaCenters;
6755 vector< gp_XYZ > & newNormals = ceCurve._normals;
6756 for ( size_t iC1 = 0; iC1 < centers.size(); ++iC1 )
6759 for ( size_t iE2 = 0; iE2 < centerCurves.size() && !isOK; ++iE2 )
6762 isOK = centerCurves[ iE2 ].FindNewNormal( centers[ iC1 ], newNormals[ iC1 ]);
6764 if ( isOK && !ceCurve._adjFace.IsNull() )
6766 // compute new _LayerEdge::_cosin
6767 const SMDS_MeshNode* node = ceCurve._ledges[ iC1 ]->_nodes[0];
6768 inFaceDir = getFaceDir( ceCurve._adjFace, ceCurve._edge, node, helper, isOK );
6771 double angle = inFaceDir.Angle( newNormals[ iC1 ] ); // [0,PI]
6772 ceCurve._ledges[ iC1 ]->_cosin = Cos( angle );
6773 avgCosin += ceCurve._ledges[ iC1 ]->_cosin;
6779 // set new normals to _LayerEdge's of NOT degenerated central curves
6780 for ( size_t iE = 0; iE < centerCurves.size(); ++iE )
6782 if ( centerCurves[ iE ]._isDegenerated )
6784 for ( size_t iLE = 0; iLE < centerCurves[ iE ]._ledges.size(); ++iLE )
6786 centerCurves[ iE ]._ledges[ iLE ]->SetNormal( centerCurves[ iE ]._normals[ iLE ]);
6787 centerCurves[ iE ]._ledges[ iLE ]->Set( _LayerEdge::NORMAL_UPDATED );
6790 // set new normals to _LayerEdge's of degenerated central curves
6791 for ( size_t iE = 0; iE < centerCurves.size(); ++iE )
6793 if ( !centerCurves[ iE ]._isDegenerated ||
6794 centerCurves[ iE ]._ledges.size() < 3 )
6796 // new normal is an average of new normals at VERTEXes that
6797 // was computed on non-degenerated _CentralCurveOnEdge's
6798 gp_XYZ newNorm = ( centerCurves[ iE ]._ledges.front()->_normal +
6799 centerCurves[ iE ]._ledges.back ()->_normal );
6800 double sz = newNorm.Modulus();
6804 double newCosin = ( 0.5 * centerCurves[ iE ]._ledges.front()->_cosin +
6805 0.5 * centerCurves[ iE ]._ledges.back ()->_cosin );
6806 for ( size_t iLE = 1, nb = centerCurves[ iE ]._ledges.size() - 1; iLE < nb; ++iLE )
6808 centerCurves[ iE ]._ledges[ iLE ]->SetNormal( newNorm );
6809 centerCurves[ iE ]._ledges[ iLE ]->_cosin = newCosin;
6810 centerCurves[ iE ]._ledges[ iLE ]->Set( _LayerEdge::NORMAL_UPDATED );
6814 // Find new normals for _LayerEdge's based on FACE
6817 avgCosin /= nbCosin;
6818 const TGeomID faceID = meshDS->ShapeToIndex( convFace._face );
6819 map< TGeomID, _EdgesOnShape* >::iterator id2eos = convFace._subIdToEOS.find( faceID );
6820 if ( id2eos != convFace._subIdToEOS.end() )
6824 _EdgesOnShape& eos = * ( id2eos->second );
6825 for ( size_t i = 0; i < eos._edges.size(); ++i )
6827 _LayerEdge* ledge = eos._edges[ i ];
6828 if ( !convFace.GetCenterOfCurvature( ledge, surfProp, helper, center ))
6830 for ( size_t i = 0; i < centerCurves.size(); ++i, ++iE )
6832 iE = iE % centerCurves.size();
6833 if ( centerCurves[ iE ]._isDegenerated )
6835 newNorm.SetCoord( 0,0,0 );
6836 if ( centerCurves[ iE ].FindNewNormal( center, newNorm ))
6838 ledge->SetNormal( newNorm );
6839 ledge->_cosin = avgCosin;
6840 ledge->Set( _LayerEdge::NORMAL_UPDATED );
6847 } // not a quasi-spherical FACE
6849 // Update _LayerEdge's data according to a new normal
6851 dumpFunction(SMESH_Comment("updateNormalsOfConvexFaces")<<data._index
6852 <<"_F"<<meshDS->ShapeToIndex( convFace._face ));
6854 id2eos = convFace._subIdToEOS.begin();
6855 for ( ; id2eos != convFace._subIdToEOS.end(); ++id2eos )
6857 _EdgesOnShape& eos = * ( id2eos->second );
6858 for ( size_t i = 0; i < eos._edges.size(); ++i )
6860 _LayerEdge* & ledge = eos._edges[ i ];
6861 double len = ledge->_len;
6862 ledge->InvalidateStep( stepNb + 1, eos, /*restoreLength=*/true );
6863 ledge->SetCosin( ledge->_cosin );
6864 ledge->SetNewLength( len, eos, helper );
6866 if ( eos.ShapeType() != TopAbs_FACE )
6867 for ( size_t i = 0; i < eos._edges.size(); ++i )
6869 _LayerEdge* ledge = eos._edges[ i ];
6870 for ( size_t iN = 0; iN < ledge->_neibors.size(); ++iN )
6872 _LayerEdge* neibor = ledge->_neibors[iN];
6873 if ( neibor->_nodes[0]->GetPosition()->GetDim() == 2 )
6875 neibor->Set( _LayerEdge::NEAR_BOUNDARY );
6876 neibor->Set( _LayerEdge::MOVED );
6877 neibor->SetSmooLen( neibor->_len );
6881 } // loop on sub-shapes of convFace._face
6883 // Find FACEs adjacent to convFace._face that got necessity to smooth
6884 // as a result of normals modification
6886 set< _EdgesOnShape* > adjFacesToSmooth;
6887 for ( size_t iE = 0; iE < centerCurves.size(); ++iE )
6889 if ( centerCurves[ iE ]._adjFace.IsNull() ||
6890 centerCurves[ iE ]._adjFaceToSmooth )
6892 for ( size_t iLE = 0; iLE < centerCurves[ iE ]._ledges.size(); ++iLE )
6894 if ( centerCurves[ iE ]._ledges[ iLE ]->_cosin > theMinSmoothCosin )
6896 adjFacesToSmooth.insert( data.GetShapeEdges( centerCurves[ iE ]._adjFace ));
6901 data.AddShapesToSmooth( adjFacesToSmooth );
6906 } // loop on data._convexFaces
6911 //================================================================================
6913 * \brief Finds a center of curvature of a surface at a _LayerEdge
6915 //================================================================================
6917 bool _ConvexFace::GetCenterOfCurvature( _LayerEdge* ledge,
6918 BRepLProp_SLProps& surfProp,
6919 SMESH_MesherHelper& helper,
6920 gp_Pnt & center ) const
6922 gp_XY uv = helper.GetNodeUV( _face, ledge->_nodes[0] );
6923 surfProp.SetParameters( uv.X(), uv.Y() );
6924 if ( !surfProp.IsCurvatureDefined() )
6927 const double oriFactor = ( _face.Orientation() == TopAbs_REVERSED ? +1. : -1. );
6928 double surfCurvatureMax = surfProp.MaxCurvature() * oriFactor;
6929 double surfCurvatureMin = surfProp.MinCurvature() * oriFactor;
6930 if ( surfCurvatureMin > surfCurvatureMax )
6931 center = surfProp.Value().Translated( surfProp.Normal().XYZ() / surfCurvatureMin * oriFactor );
6933 center = surfProp.Value().Translated( surfProp.Normal().XYZ() / surfCurvatureMax * oriFactor );
6938 //================================================================================
6940 * \brief Check that prisms are not distorted
6942 //================================================================================
6944 bool _ConvexFace::CheckPrisms() const
6947 for ( size_t i = 0; i < _simplexTestEdges.size(); ++i )
6949 const _LayerEdge* edge = _simplexTestEdges[i];
6950 SMESH_TNodeXYZ tgtXYZ( edge->_nodes.back() );
6951 for ( size_t j = 0; j < edge->_simplices.size(); ++j )
6952 if ( !edge->_simplices[j].IsForward( edge->_nodes[0], tgtXYZ, vol ))
6954 debugMsg( "Bad simplex of _simplexTestEdges ("
6955 << " "<< edge->_nodes[0]->GetID()<< " "<< tgtXYZ._node->GetID()
6956 << " "<< edge->_simplices[j]._nPrev->GetID()
6957 << " "<< edge->_simplices[j]._nNext->GetID() << " )" );
6964 //================================================================================
6966 * \brief Try to compute a new normal by interpolating normals of _LayerEdge's
6967 * stored in this _CentralCurveOnEdge.
6968 * \param [in] center - curvature center of a point of another _CentralCurveOnEdge.
6969 * \param [in,out] newNormal - current normal at this point, to be redefined
6970 * \return bool - true if succeeded.
6972 //================================================================================
6974 bool _CentralCurveOnEdge::FindNewNormal( const gp_Pnt& center, gp_XYZ& newNormal )
6976 if ( this->_isDegenerated )
6979 // find two centers the given one lies between
6981 for ( size_t i = 0, nb = _curvaCenters.size()-1; i < nb; ++i )
6983 double sl2 = 1.001 * _segLength2[ i ];
6985 double d1 = center.SquareDistance( _curvaCenters[ i ]);
6989 double d2 = center.SquareDistance( _curvaCenters[ i+1 ]);
6990 if ( d2 > sl2 || d2 + d1 < 1e-100 )
6995 double r = d1 / ( d1 + d2 );
6996 gp_XYZ norm = (( 1. - r ) * _ledges[ i ]->_normal +
6997 ( r ) * _ledges[ i+1 ]->_normal );
7001 double sz = newNormal.Modulus();
7010 //================================================================================
7012 * \brief Set shape members
7014 //================================================================================
7016 void _CentralCurveOnEdge::SetShapes( const TopoDS_Edge& edge,
7017 const _ConvexFace& convFace,
7019 SMESH_MesherHelper& helper)
7023 PShapeIteratorPtr fIt = helper.GetAncestors( edge, *helper.GetMesh(), TopAbs_FACE );
7024 while ( const TopoDS_Shape* F = fIt->next())
7025 if ( !convFace._face.IsSame( *F ))
7027 _adjFace = TopoDS::Face( *F );
7028 _adjFaceToSmooth = false;
7029 // _adjFace already in a smoothing queue ?
7030 if ( _EdgesOnShape* eos = data.GetShapeEdges( _adjFace ))
7031 _adjFaceToSmooth = eos->_toSmooth;
7036 //================================================================================
7038 * \brief Looks for intersection of it's last segment with faces
7039 * \param distance - returns shortest distance from the last node to intersection
7041 //================================================================================
7043 bool _LayerEdge::FindIntersection( SMESH_ElementSearcher& searcher,
7045 const double& epsilon,
7047 const SMDS_MeshElement** intFace)
7049 vector< const SMDS_MeshElement* > suspectFaces;
7051 gp_Ax1 lastSegment = LastSegment( segLen, eos );
7052 searcher.GetElementsNearLine( lastSegment, SMDSAbs_Face, suspectFaces );
7054 bool segmentIntersected = false;
7055 distance = Precision::Infinite();
7056 int iFace = -1; // intersected face
7057 for ( size_t j = 0 ; j < suspectFaces.size() /*&& !segmentIntersected*/; ++j )
7059 const SMDS_MeshElement* face = suspectFaces[j];
7060 if ( face->GetNodeIndex( _nodes.back() ) >= 0 ||
7061 face->GetNodeIndex( _nodes[0] ) >= 0 )
7062 continue; // face sharing _LayerEdge node
7063 const int nbNodes = face->NbCornerNodes();
7064 bool intFound = false;
7066 SMDS_MeshElement::iterator nIt = face->begin_nodes();
7069 intFound = SegTriaInter( lastSegment, *nIt++, *nIt++, *nIt++, dist, epsilon );
7073 const SMDS_MeshNode* tria[3];
7076 for ( int n2 = 2; n2 < nbNodes && !intFound; ++n2 )
7079 intFound = SegTriaInter(lastSegment, tria[0], tria[1], tria[2], dist, epsilon );
7085 if ( dist < segLen*(1.01) && dist > -(_len*_lenFactor-segLen) )
7086 segmentIntersected = true;
7087 if ( distance > dist )
7088 distance = dist, iFace = j;
7091 if ( intFace ) *intFace = ( iFace != -1 ) ? suspectFaces[iFace] : 0;
7095 if ( segmentIntersected )
7098 SMDS_MeshElement::iterator nIt = suspectFaces[iFace]->begin_nodes();
7099 gp_XYZ intP( lastSegment.Location().XYZ() + lastSegment.Direction().XYZ() * ( distance+segLen ));
7100 cout << "nodes: tgt " << _nodes.back()->GetID() << " src " << _nodes[0]->GetID()
7101 << ", intersection with face ("
7102 << (*nIt++)->GetID()<<" "<< (*nIt++)->GetID()<<" "<< (*nIt++)->GetID()
7103 << ") at point (" << intP.X() << ", " << intP.Y() << ", " << intP.Z()
7104 << ") distance = " << distance << endl;
7108 return segmentIntersected;
7111 //================================================================================
7113 * \brief Returns size and direction of the last segment
7115 //================================================================================
7117 gp_Ax1 _LayerEdge::LastSegment(double& segLen, _EdgesOnShape& eos) const
7119 // find two non-coincident positions
7120 gp_XYZ orig = _pos.back();
7122 int iPrev = _pos.size() - 2;
7123 //const double tol = ( _len > 0 ) ? 0.3*_len : 1e-100; // adjusted for IPAL52478 + PAL22576
7124 const double tol = ( _len > 0 ) ? ( 1e-6 * _len ) : 1e-100;
7125 while ( iPrev >= 0 )
7127 vec = orig - _pos[iPrev];
7128 if ( vec.SquareModulus() > tol*tol )
7138 segDir.SetLocation( SMESH_TNodeXYZ( _nodes[0] ));
7139 segDir.SetDirection( _normal );
7144 gp_Pnt pPrev = _pos[ iPrev ];
7145 if ( !eos._sWOL.IsNull() )
7147 TopLoc_Location loc;
7148 if ( eos.SWOLType() == TopAbs_EDGE )
7151 Handle(Geom_Curve) curve = BRep_Tool::Curve( TopoDS::Edge( eos._sWOL ), loc, f,l);
7152 pPrev = curve->Value( pPrev.X() ).Transformed( loc );
7156 Handle(Geom_Surface) surface = BRep_Tool::Surface( TopoDS::Face( eos._sWOL ), loc );
7157 pPrev = surface->Value( pPrev.X(), pPrev.Y() ).Transformed( loc );
7159 vec = SMESH_TNodeXYZ( _nodes.back() ) - pPrev.XYZ();
7161 segDir.SetLocation( pPrev );
7162 segDir.SetDirection( vec );
7163 segLen = vec.Modulus();
7169 //================================================================================
7171 * \brief Return the last position of the target node on a FACE.
7172 * \param [in] F - the FACE this _LayerEdge is inflated along
7173 * \return gp_XY - result UV
7175 //================================================================================
7177 gp_XY _LayerEdge::LastUV( const TopoDS_Face& F, _EdgesOnShape& eos ) const
7179 if ( F.IsSame( eos._sWOL )) // F is my FACE
7180 return gp_XY( _pos.back().X(), _pos.back().Y() );
7182 if ( eos.SWOLType() != TopAbs_EDGE ) // wrong call
7183 return gp_XY( 1e100, 1e100 );
7185 // _sWOL is EDGE of F; _pos.back().X() is the last U on the EDGE
7186 double f, l, u = _pos.back().X();
7187 Handle(Geom2d_Curve) C2d = BRep_Tool::CurveOnSurface( TopoDS::Edge(eos._sWOL), F, f,l);
7188 if ( !C2d.IsNull() && f <= u && u <= l )
7189 return C2d->Value( u ).XY();
7191 return gp_XY( 1e100, 1e100 );
7194 //================================================================================
7196 * \brief Test intersection of the last segment with a given triangle
7197 * using Moller-Trumbore algorithm
7198 * Intersection is detected if distance to intersection is less than _LayerEdge._len
7200 //================================================================================
7202 bool _LayerEdge::SegTriaInter( const gp_Ax1& lastSegment,
7203 const gp_XYZ& vert0,
7204 const gp_XYZ& vert1,
7205 const gp_XYZ& vert2,
7207 const double& EPSILON) const
7209 const gp_Pnt& orig = lastSegment.Location();
7210 const gp_Dir& dir = lastSegment.Direction();
7212 /* calculate distance from vert0 to ray origin */
7213 gp_XYZ tvec = orig.XYZ() - vert0;
7215 //if ( tvec * dir > EPSILON )
7216 // intersected face is at back side of the temporary face this _LayerEdge belongs to
7219 gp_XYZ edge1 = vert1 - vert0;
7220 gp_XYZ edge2 = vert2 - vert0;
7222 /* begin calculating determinant - also used to calculate U parameter */
7223 gp_XYZ pvec = dir.XYZ() ^ edge2;
7225 /* if determinant is near zero, ray lies in plane of triangle */
7226 double det = edge1 * pvec;
7228 const double ANGL_EPSILON = 1e-12;
7229 if ( det > -ANGL_EPSILON && det < ANGL_EPSILON )
7232 /* calculate U parameter and test bounds */
7233 double u = ( tvec * pvec ) / det;
7234 //if (u < 0.0 || u > 1.0)
7235 if ( u < -EPSILON || u > 1.0 + EPSILON )
7238 /* prepare to test V parameter */
7239 gp_XYZ qvec = tvec ^ edge1;
7241 /* calculate V parameter and test bounds */
7242 double v = (dir.XYZ() * qvec) / det;
7243 //if ( v < 0.0 || u + v > 1.0 )
7244 if ( v < -EPSILON || u + v > 1.0 + EPSILON )
7247 /* calculate t, ray intersects triangle */
7248 t = (edge2 * qvec) / det;
7254 //================================================================================
7256 * \brief _LayerEdge, located at a concave VERTEX of a FACE, moves target nodes of
7257 * neighbor _LayerEdge's by it's own inflation vector.
7258 * \param [in] eov - EOS of the VERTEX
7259 * \param [in] eos - EOS of the FACE
7260 * \param [in] step - inflation step
7261 * \param [in,out] badSmooEdges - not untangled _LayerEdge's
7263 //================================================================================
7265 void _LayerEdge::MoveNearConcaVer( const _EdgesOnShape* eov,
7266 const _EdgesOnShape* eos,
7268 vector< _LayerEdge* > & badSmooEdges )
7270 // check if any of _neibors is in badSmooEdges
7271 if ( std::find_first_of( _neibors.begin(), _neibors.end(),
7272 badSmooEdges.begin(), badSmooEdges.end() ) == _neibors.end() )
7275 // get all edges to move
7277 set< _LayerEdge* > edges;
7279 // find a distance between _LayerEdge on VERTEX and its neighbors
7280 gp_XYZ curPosV = SMESH_TNodeXYZ( _nodes.back() );
7282 for ( size_t i = 0; i < _neibors.size(); ++i )
7284 _LayerEdge* nEdge = _neibors[i];
7285 if ( nEdge->_nodes[0]->getshapeId() == eos->_shapeID )
7287 edges.insert( nEdge );
7288 dist2 = Max( dist2, ( curPosV - nEdge->_pos.back() ).SquareModulus() );
7291 // add _LayerEdge's close to curPosV
7295 for ( set< _LayerEdge* >::iterator e = edges.begin(); e != edges.end(); ++e )
7297 _LayerEdge* edgeF = *e;
7298 for ( size_t i = 0; i < edgeF->_neibors.size(); ++i )
7300 _LayerEdge* nEdge = edgeF->_neibors[i];
7301 if ( nEdge->_nodes[0]->getshapeId() == eos->_shapeID &&
7302 dist2 > ( curPosV - nEdge->_pos.back() ).SquareModulus() )
7303 edges.insert( nEdge );
7307 while ( nbE < edges.size() );
7309 // move the target node of the got edges
7311 gp_XYZ prevPosV = PrevPos();
7312 if ( eov->SWOLType() == TopAbs_EDGE )
7314 BRepAdaptor_Curve curve ( TopoDS::Edge( eov->_sWOL ));
7315 prevPosV = curve.Value( prevPosV.X() ).XYZ();
7317 else if ( eov->SWOLType() == TopAbs_FACE )
7319 BRepAdaptor_Surface surface( TopoDS::Face( eov->_sWOL ));
7320 prevPosV = surface.Value( prevPosV.X(), prevPosV.Y() ).XYZ();
7323 SMDS_FacePosition* fPos;
7324 //double r = 1. - Min( 0.9, step / 10. );
7325 for ( set< _LayerEdge* >::iterator e = edges.begin(); e != edges.end(); ++e )
7327 _LayerEdge* edgeF = *e;
7328 const gp_XYZ prevVF = edgeF->PrevPos() - prevPosV;
7329 const gp_XYZ newPosF = curPosV + prevVF;
7330 SMDS_MeshNode* tgtNodeF = const_cast<SMDS_MeshNode*>( edgeF->_nodes.back() );
7331 tgtNodeF->setXYZ( newPosF.X(), newPosF.Y(), newPosF.Z() );
7332 edgeF->_pos.back() = newPosF;
7333 dumpMoveComm( tgtNodeF, "MoveNearConcaVer" ); // debug
7335 // set _curvature to make edgeF updated by putOnOffsetSurface()
7336 if ( !edgeF->_curvature )
7337 if (( fPos = dynamic_cast<SMDS_FacePosition*>( edgeF->_nodes[0]->GetPosition() )))
7339 edgeF->_curvature = new _Curvature;
7340 edgeF->_curvature->_r = 0;
7341 edgeF->_curvature->_k = 0;
7342 edgeF->_curvature->_h2lenRatio = 0;
7343 edgeF->_curvature->_uv.SetCoord( fPos->GetUParameter(), fPos->GetVParameter() );
7346 // gp_XYZ inflationVec( SMESH_TNodeXYZ( _nodes.back() ) -
7347 // SMESH_TNodeXYZ( _nodes[0] ));
7348 // for ( set< _LayerEdge* >::iterator e = edges.begin(); e != edges.end(); ++e )
7350 // _LayerEdge* edgeF = *e;
7351 // gp_XYZ newPos = SMESH_TNodeXYZ( edgeF->_nodes[0] ) + inflationVec;
7352 // SMDS_MeshNode* tgtNode = const_cast<SMDS_MeshNode*>( edgeF->_nodes.back() );
7353 // tgtNode->setXYZ( newPos.X(), newPos.Y(), newPos.Z() );
7354 // edgeF->_pos.back() = newPosF;
7355 // dumpMoveComm( tgtNode, "MoveNearConcaVer" ); // debug
7358 // smooth _LayerEdge's around moved nodes
7359 //size_t nbBadBefore = badSmooEdges.size();
7360 for ( set< _LayerEdge* >::iterator e = edges.begin(); e != edges.end(); ++e )
7362 _LayerEdge* edgeF = *e;
7363 for ( size_t j = 0; j < edgeF->_neibors.size(); ++j )
7364 if ( edgeF->_neibors[j]->_nodes[0]->getshapeId() == eos->_shapeID )
7365 //&& !edges.count( edgeF->_neibors[j] ))
7367 _LayerEdge* edgeFN = edgeF->_neibors[j];
7368 edgeFN->Unset( SMOOTHED );
7369 int nbBad = edgeFN->Smooth( step, /*isConcaFace=*/true, /*findBest=*/true );
7372 // gp_XYZ newPos = SMESH_TNodeXYZ( edgeFN->_nodes[0] ) + inflationVec;
7373 // const gp_XYZ& prevPos = edgeFN->_pos[ edgeFN->_pos.size()-2 ];
7374 // int nbBadAfter = edgeFN->_simplices.size();
7376 // for ( size_t iS = 0; iS < edgeFN->_simplices.size(); ++iS )
7378 // nbBadAfter -= edgeFN->_simplices[iS].IsForward( &prevPos, &newPos, vol );
7380 // if ( nbBadAfter <= nbBad )
7382 // SMDS_MeshNode* tgtNode = const_cast<SMDS_MeshNode*>( edgeFN->_nodes.back() );
7383 // tgtNode->setXYZ( newPos.X(), newPos.Y(), newPos.Z() );
7384 // edgeF->_pos.back() = newPosF;
7385 // dumpMoveComm( tgtNode, "MoveNearConcaVer 2" ); // debug
7386 // nbBad = nbBadAfter;
7390 badSmooEdges.push_back( edgeFN );
7393 // move a bit not smoothed around moved nodes
7394 // for ( size_t i = nbBadBefore; i < badSmooEdges.size(); ++i )
7396 // _LayerEdge* edgeF = badSmooEdges[i];
7397 // SMDS_MeshNode* tgtNode = const_cast<SMDS_MeshNode*>( edgeF->_nodes.back() );
7398 // gp_XYZ newPos1 = SMESH_TNodeXYZ( edgeF->_nodes[0] ) + inflationVec;
7399 // gp_XYZ newPos2 = 0.5 * ( newPos1 + SMESH_TNodeXYZ( tgtNode ));
7400 // tgtNode->setXYZ( newPos2.X(), newPos2.Y(), newPos2.Z() );
7401 // edgeF->_pos.back() = newPosF;
7402 // dumpMoveComm( tgtNode, "MoveNearConcaVer 2" ); // debug
7406 //================================================================================
7408 * \brief Perform smooth of _LayerEdge's based on EDGE's
7409 * \retval bool - true if node has been moved
7411 //================================================================================
7413 bool _LayerEdge::SmoothOnEdge(Handle(ShapeAnalysis_Surface)& surface,
7414 const TopoDS_Face& F,
7415 SMESH_MesherHelper& helper)
7417 ASSERT( IsOnEdge() );
7419 SMDS_MeshNode* tgtNode = const_cast<SMDS_MeshNode*>( _nodes.back() );
7420 SMESH_TNodeXYZ oldPos( tgtNode );
7421 double dist01, distNewOld;
7423 SMESH_TNodeXYZ p0( _2neibors->tgtNode(0));
7424 SMESH_TNodeXYZ p1( _2neibors->tgtNode(1));
7425 dist01 = p0.Distance( _2neibors->tgtNode(1) );
7427 gp_Pnt newPos = p0 * _2neibors->_wgt[0] + p1 * _2neibors->_wgt[1];
7428 double lenDelta = 0;
7431 //lenDelta = _curvature->lenDelta( _len );
7432 lenDelta = _curvature->lenDeltaByDist( dist01 );
7433 newPos.ChangeCoord() += _normal * lenDelta;
7436 distNewOld = newPos.Distance( oldPos );
7440 if ( _2neibors->_plnNorm )
7442 // put newPos on the plane defined by source node and _plnNorm
7443 gp_XYZ new2src = SMESH_TNodeXYZ( _nodes[0] ) - newPos.XYZ();
7444 double new2srcProj = (*_2neibors->_plnNorm) * new2src;
7445 newPos.ChangeCoord() += (*_2neibors->_plnNorm) * new2srcProj;
7447 tgtNode->setXYZ( newPos.X(), newPos.Y(), newPos.Z() );
7448 _pos.back() = newPos.XYZ();
7452 tgtNode->setXYZ( newPos.X(), newPos.Y(), newPos.Z() );
7453 gp_XY uv( Precision::Infinite(), 0 );
7454 helper.CheckNodeUV( F, tgtNode, uv, 1e-10, /*force=*/true );
7455 _pos.back().SetCoord( uv.X(), uv.Y(), 0 );
7457 newPos = surface->Value( uv );
7458 tgtNode->setXYZ( newPos.X(), newPos.Y(), newPos.Z() );
7461 // commented for IPAL0052478
7462 // if ( _curvature && lenDelta < 0 )
7464 // gp_Pnt prevPos( _pos[ _pos.size()-2 ]);
7465 // _len -= prevPos.Distance( oldPos );
7466 // _len += prevPos.Distance( newPos );
7468 bool moved = distNewOld > dist01/50;
7470 dumpMove( tgtNode ); // debug
7475 //================================================================================
7477 * \brief Perform 3D smooth of nodes inflated from FACE. No check of validity
7479 //================================================================================
7481 void _LayerEdge::SmoothWoCheck()
7483 if ( Is( DIFFICULT ))
7486 bool moved = Is( SMOOTHED );
7487 for ( size_t i = 0; i < _neibors.size() && !moved; ++i )
7488 moved = _neibors[i]->Is( SMOOTHED );
7492 gp_XYZ newPos = (this->*_smooFunction)(); // fun chosen by ChooseSmooFunction()
7494 SMDS_MeshNode* n = const_cast< SMDS_MeshNode* >( _nodes.back() );
7495 n->setXYZ( newPos.X(), newPos.Y(), newPos.Z());
7496 _pos.back() = newPos;
7498 dumpMoveComm( n, SMESH_Comment("No check - ") << _funNames[ smooFunID() ]);
7501 //================================================================================
7503 * \brief Checks validity of _neibors on EDGEs and VERTEXes
7505 //================================================================================
7507 int _LayerEdge::CheckNeiborsOnBoundary( vector< _LayerEdge* >* badNeibors, bool * needSmooth )
7509 if ( ! Is( NEAR_BOUNDARY ))
7514 for ( size_t iN = 0; iN < _neibors.size(); ++iN )
7516 _LayerEdge* eN = _neibors[iN];
7517 if ( eN->_nodes[0]->getshapeId() == _nodes[0]->getshapeId() )
7520 *needSmooth |= ( eN->Is( _LayerEdge::BLOCKED ) || eN->Is( _LayerEdge::NORMAL_UPDATED ));
7522 SMESH_TNodeXYZ curPosN ( eN->_nodes.back() );
7523 SMESH_TNodeXYZ prevPosN( eN->_nodes[0] );
7524 for ( size_t i = 0; i < eN->_simplices.size(); ++i )
7525 if ( eN->_nodes.size() > 1 &&
7526 eN->_simplices[i].Includes( _nodes.back() ) &&
7527 !eN->_simplices[i].IsForward( &prevPosN, &curPosN, vol ))
7532 badNeibors->push_back( eN );
7533 debugMsg("Bad boundary simplex ( "
7534 << " "<< eN->_nodes[0]->GetID()
7535 << " "<< eN->_nodes.back()->GetID()
7536 << " "<< eN->_simplices[i]._nPrev->GetID()
7537 << " "<< eN->_simplices[i]._nNext->GetID() << " )" );
7548 //================================================================================
7550 * \brief Perform 'smart' 3D smooth of nodes inflated from FACE
7551 * \retval int - nb of bad simplices around this _LayerEdge
7553 //================================================================================
7555 int _LayerEdge::Smooth(const int step, bool findBest, vector< _LayerEdge* >& toSmooth )
7557 if ( !Is( MOVED ) || Is( SMOOTHED ))
7558 return 0; // shape of simplices not changed
7559 if ( _simplices.size() < 2 )
7560 return 0; // _LayerEdge inflated along EDGE or FACE
7562 if ( Is( DIFFICULT )) // || Is( ON_CONCAVE_FACE )
7565 const gp_XYZ& curPos = _pos.back();
7566 const gp_XYZ& prevPos = PrevCheckPos();
7568 // quality metrics (orientation) of tetras around _tgtNode
7570 double vol, minVolBefore = 1e100;
7571 for ( size_t i = 0; i < _simplices.size(); ++i )
7573 nbOkBefore += _simplices[i].IsForward( &prevPos, &curPos, vol );
7574 minVolBefore = Min( minVolBefore, vol );
7576 int nbBad = _simplices.size() - nbOkBefore;
7578 bool bndNeedSmooth = false;
7580 nbBad = CheckNeiborsOnBoundary( 0, & bndNeedSmooth );
7584 // evaluate min angle
7585 if ( nbBad == 0 && !findBest && !bndNeedSmooth )
7587 size_t nbGoodAngles = _simplices.size();
7589 for ( size_t i = 0; i < _simplices.size(); ++i )
7591 if ( !_simplices[i].IsMinAngleOK( curPos, angle ) && angle > _minAngle )
7594 if ( nbGoodAngles == _simplices.size() )
7600 if ( Is( ON_CONCAVE_FACE ))
7603 if ( step % 2 == 0 )
7606 if ( Is( ON_CONCAVE_FACE ) && !findBest ) // alternate FUN_CENTROIDAL and FUN_LAPLACIAN
7608 if ( _smooFunction == _funs[ FUN_LAPLACIAN ] )
7609 _smooFunction = _funs[ FUN_CENTROIDAL ];
7611 _smooFunction = _funs[ FUN_LAPLACIAN ];
7614 // compute new position for the last _pos using different _funs
7617 for ( int iFun = -1; iFun < theNbSmooFuns; ++iFun )
7620 newPos = (this->*_smooFunction)(); // fun chosen by ChooseSmooFunction()
7621 else if ( _funs[ iFun ] == _smooFunction )
7622 continue; // _smooFunction again
7623 else if ( step > 1 )
7624 newPos = (this->*_funs[ iFun ])(); // try other smoothing fun
7626 break; // let "easy" functions improve elements around distorted ones
7630 double delta = _curvature->lenDelta( _len );
7632 newPos += _normal * delta;
7635 double segLen = _normal * ( newPos - prevPos );
7636 if ( segLen + delta > 0 )
7637 newPos += _normal * delta;
7639 // double segLenChange = _normal * ( curPos - newPos );
7640 // newPos += 0.5 * _normal * segLenChange;
7644 double minVolAfter = 1e100;
7645 for ( size_t i = 0; i < _simplices.size(); ++i )
7647 nbOkAfter += _simplices[i].IsForward( &prevPos, &newPos, vol );
7648 minVolAfter = Min( minVolAfter, vol );
7651 if ( nbOkAfter < nbOkBefore )
7655 ( nbOkAfter == nbOkBefore ) &&
7656 ( minVolAfter <= minVolBefore ))
7659 nbBad = _simplices.size() - nbOkAfter;
7660 minVolBefore = minVolAfter;
7661 nbOkBefore = nbOkAfter;
7664 SMDS_MeshNode* n = const_cast< SMDS_MeshNode* >( _nodes.back() );
7665 n->setXYZ( newPos.X(), newPos.Y(), newPos.Z());
7666 _pos.back() = newPos;
7668 dumpMoveComm( n, SMESH_Comment( _funNames[ iFun < 0 ? smooFunID() : iFun ] )
7669 << (nbBad ? " --BAD" : ""));
7673 continue; // look for a better function
7679 } // loop on smoothing functions
7681 if ( moved ) // notify _neibors
7684 for ( size_t i = 0; i < _neibors.size(); ++i )
7685 if ( !_neibors[i]->Is( MOVED ))
7687 _neibors[i]->Set( MOVED );
7688 toSmooth.push_back( _neibors[i] );
7695 //================================================================================
7697 * \brief Perform 'smart' 3D smooth of nodes inflated from FACE
7698 * \retval int - nb of bad simplices around this _LayerEdge
7700 //================================================================================
7702 int _LayerEdge::Smooth(const int step, const bool isConcaveFace, bool findBest )
7704 if ( !_smooFunction )
7705 return 0; // _LayerEdge inflated along EDGE or FACE
7707 return 0; // not inflated
7709 const gp_XYZ& curPos = _pos.back();
7710 const gp_XYZ& prevPos = PrevCheckPos();
7712 // quality metrics (orientation) of tetras around _tgtNode
7714 double vol, minVolBefore = 1e100;
7715 for ( size_t i = 0; i < _simplices.size(); ++i )
7717 nbOkBefore += _simplices[i].IsForward( &prevPos, &curPos, vol );
7718 minVolBefore = Min( minVolBefore, vol );
7720 int nbBad = _simplices.size() - nbOkBefore;
7722 if ( isConcaveFace ) // alternate FUN_CENTROIDAL and FUN_LAPLACIAN
7724 if ( _smooFunction == _funs[ FUN_CENTROIDAL ] && step % 2 )
7725 _smooFunction = _funs[ FUN_LAPLACIAN ];
7726 else if ( _smooFunction == _funs[ FUN_LAPLACIAN ] && !( step % 2 ))
7727 _smooFunction = _funs[ FUN_CENTROIDAL ];
7730 // compute new position for the last _pos using different _funs
7732 for ( int iFun = -1; iFun < theNbSmooFuns; ++iFun )
7735 newPos = (this->*_smooFunction)(); // fun chosen by ChooseSmooFunction()
7736 else if ( _funs[ iFun ] == _smooFunction )
7737 continue; // _smooFunction again
7738 else if ( step > 1 )
7739 newPos = (this->*_funs[ iFun ])(); // try other smoothing fun
7741 break; // let "easy" functions improve elements around distorted ones
7745 double delta = _curvature->lenDelta( _len );
7747 newPos += _normal * delta;
7750 double segLen = _normal * ( newPos - prevPos );
7751 if ( segLen + delta > 0 )
7752 newPos += _normal * delta;
7754 // double segLenChange = _normal * ( curPos - newPos );
7755 // newPos += 0.5 * _normal * segLenChange;
7759 double minVolAfter = 1e100;
7760 for ( size_t i = 0; i < _simplices.size(); ++i )
7762 nbOkAfter += _simplices[i].IsForward( &prevPos, &newPos, vol );
7763 minVolAfter = Min( minVolAfter, vol );
7766 if ( nbOkAfter < nbOkBefore )
7768 if (( isConcaveFace || findBest ) &&
7769 ( nbOkAfter == nbOkBefore ) &&
7770 ( minVolAfter <= minVolBefore )
7774 nbBad = _simplices.size() - nbOkAfter;
7775 minVolBefore = minVolAfter;
7776 nbOkBefore = nbOkAfter;
7778 SMDS_MeshNode* n = const_cast< SMDS_MeshNode* >( _nodes.back() );
7779 n->setXYZ( newPos.X(), newPos.Y(), newPos.Z());
7780 _pos.back() = newPos;
7782 dumpMoveComm( n, SMESH_Comment( _funNames[ iFun < 0 ? smooFunID() : iFun ] )
7783 << ( nbBad ? "--BAD" : ""));
7785 // commented for IPAL0052478
7786 // _len -= prevPos.Distance(SMESH_TNodeXYZ( n ));
7787 // _len += prevPos.Distance(newPos);
7789 if ( iFun > -1 ) // findBest || the chosen _fun makes worse
7791 //_smooFunction = _funs[ iFun ];
7792 // cout << "# " << _funNames[ iFun ] << "\t N:" << _nodes.back()->GetID()
7793 // << "\t nbBad: " << _simplices.size() - nbOkAfter
7794 // << " minVol: " << minVolAfter
7795 // << " " << newPos.X() << " " << newPos.Y() << " " << newPos.Z()
7797 continue; // look for a better function
7803 } // loop on smoothing functions
7808 //================================================================================
7810 * \brief Chooses a smoothing technic giving a position most close to an initial one.
7811 * For a correct result, _simplices must contain nodes lying on geometry.
7813 //================================================================================
7815 void _LayerEdge::ChooseSmooFunction( const set< TGeomID >& concaveVertices,
7816 const TNode2Edge& n2eMap)
7818 if ( _smooFunction ) return;
7820 // use smoothNefPolygon() near concaveVertices
7821 if ( !concaveVertices.empty() )
7823 _smooFunction = _funs[ FUN_CENTROIDAL ];
7825 Set( ON_CONCAVE_FACE );
7827 for ( size_t i = 0; i < _simplices.size(); ++i )
7829 if ( concaveVertices.count( _simplices[i]._nPrev->getshapeId() ))
7831 _smooFunction = _funs[ FUN_NEFPOLY ];
7833 // set FUN_CENTROIDAL to neighbor edges
7834 for ( i = 0; i < _neibors.size(); ++i )
7836 if ( _neibors[i]->_nodes[0]->GetPosition()->GetDim() == 2 )
7838 _neibors[i]->_smooFunction = _funs[ FUN_CENTROIDAL ];
7845 // // this coice is done only if ( !concaveVertices.empty() ) for Grids/smesh/bugs_19/X1
7846 // // where the nodes are smoothed too far along a sphere thus creating
7847 // // inverted _simplices
7848 // double dist[theNbSmooFuns];
7849 // //double coef[theNbSmooFuns] = { 1., 1.2, 1.4, 1.4 };
7850 // double coef[theNbSmooFuns] = { 1., 1., 1., 1. };
7852 // double minDist = Precision::Infinite();
7853 // gp_Pnt p = SMESH_TNodeXYZ( _nodes[0] );
7854 // for ( int i = 0; i < FUN_NEFPOLY; ++i )
7856 // gp_Pnt newP = (this->*_funs[i])();
7857 // dist[i] = p.SquareDistance( newP );
7858 // if ( dist[i]*coef[i] < minDist )
7860 // _smooFunction = _funs[i];
7861 // minDist = dist[i]*coef[i];
7867 _smooFunction = _funs[ FUN_LAPLACIAN ];
7870 // for ( size_t i = 0; i < _simplices.size(); ++i )
7871 // minDim = Min( minDim, _simplices[i]._nPrev->GetPosition()->GetDim() );
7872 // if ( minDim == 0 )
7873 // _smooFunction = _funs[ FUN_CENTROIDAL ];
7874 // else if ( minDim == 1 )
7875 // _smooFunction = _funs[ FUN_CENTROIDAL ];
7879 // for ( int i = 0; i < FUN_NB; ++i )
7881 // //cout << dist[i] << " ";
7882 // if ( _smooFunction == _funs[i] ) {
7884 // //debugMsg( fNames[i] );
7888 // cout << _funNames[ iMin ] << "\t N:" << _nodes.back()->GetID() << endl;
7891 //================================================================================
7893 * \brief Returns a name of _SmooFunction
7895 //================================================================================
7897 int _LayerEdge::smooFunID( _LayerEdge::PSmooFun fun) const
7900 fun = _smooFunction;
7901 for ( int i = 0; i < theNbSmooFuns; ++i )
7902 if ( fun == _funs[i] )
7905 return theNbSmooFuns;
7908 //================================================================================
7910 * \brief Computes a new node position using Laplacian smoothing
7912 //================================================================================
7914 gp_XYZ _LayerEdge::smoothLaplacian()
7916 gp_XYZ newPos (0,0,0);
7917 for ( size_t i = 0; i < _simplices.size(); ++i )
7918 newPos += SMESH_TNodeXYZ( _simplices[i]._nPrev );
7919 newPos /= _simplices.size();
7924 //================================================================================
7926 * \brief Computes a new node position using angular-based smoothing
7928 //================================================================================
7930 gp_XYZ _LayerEdge::smoothAngular()
7932 vector< gp_Vec > edgeDir; edgeDir. reserve( _simplices.size() + 1 );
7933 vector< double > edgeSize; edgeSize.reserve( _simplices.size() );
7934 vector< gp_XYZ > points; points. reserve( _simplices.size() + 1 );
7936 gp_XYZ pPrev = SMESH_TNodeXYZ( _simplices.back()._nPrev );
7938 for ( size_t i = 0; i < _simplices.size(); ++i )
7940 gp_XYZ p = SMESH_TNodeXYZ( _simplices[i]._nPrev );
7941 edgeDir.push_back( p - pPrev );
7942 edgeSize.push_back( edgeDir.back().Magnitude() );
7943 if ( edgeSize.back() < numeric_limits<double>::min() )
7946 edgeSize.pop_back();
7950 edgeDir.back() /= edgeSize.back();
7951 points.push_back( p );
7956 edgeDir.push_back ( edgeDir[0] );
7957 edgeSize.push_back( edgeSize[0] );
7958 pN /= points.size();
7960 gp_XYZ newPos(0,0,0);
7962 for ( size_t i = 0; i < points.size(); ++i )
7964 gp_Vec toN = pN - points[i];
7965 double toNLen = toN.Magnitude();
7966 if ( toNLen < numeric_limits<double>::min() )
7971 gp_Vec bisec = edgeDir[i] + edgeDir[i+1];
7972 double bisecLen = bisec.SquareMagnitude();
7973 if ( bisecLen < numeric_limits<double>::min() )
7975 gp_Vec norm = edgeDir[i] ^ toN;
7976 bisec = norm ^ edgeDir[i];
7977 bisecLen = bisec.SquareMagnitude();
7979 bisecLen = Sqrt( bisecLen );
7983 gp_XYZ pNew = ( points[i] + bisec.XYZ() * toNLen ) * bisecLen;
7984 sumSize += bisecLen;
7986 gp_XYZ pNew = ( points[i] + bisec.XYZ() * toNLen ) * ( edgeSize[i] + edgeSize[i+1] );
7987 sumSize += ( edgeSize[i] + edgeSize[i+1] );
7993 // project newPos to an average plane
7995 gp_XYZ norm(0,0,0); // plane normal
7996 points.push_back( points[0] );
7997 for ( size_t i = 1; i < points.size(); ++i )
7999 gp_XYZ vec1 = points[ i-1 ] - pN;
8000 gp_XYZ vec2 = points[ i ] - pN;
8001 gp_XYZ cross = vec1 ^ vec2;
8004 if ( cross * norm < numeric_limits<double>::min() )
8005 norm += cross.Reversed();
8009 catch (Standard_Failure) { // if |cross| == 0.
8012 gp_XYZ vec = newPos - pN;
8013 double r = ( norm * vec ) / norm.SquareModulus(); // param [0,1] on norm
8014 newPos = newPos - r * norm;
8019 //================================================================================
8021 * \brief Computes a new node position using weigthed node positions
8023 //================================================================================
8025 gp_XYZ _LayerEdge::smoothLengthWeighted()
8027 vector< double > edgeSize; edgeSize.reserve( _simplices.size() + 1);
8028 vector< gp_XYZ > points; points. reserve( _simplices.size() );
8030 gp_XYZ pPrev = SMESH_TNodeXYZ( _simplices.back()._nPrev );
8031 for ( size_t i = 0; i < _simplices.size(); ++i )
8033 gp_XYZ p = SMESH_TNodeXYZ( _simplices[i]._nPrev );
8034 edgeSize.push_back( ( p - pPrev ).Modulus() );
8035 if ( edgeSize.back() < numeric_limits<double>::min() )
8037 edgeSize.pop_back();
8041 points.push_back( p );
8045 edgeSize.push_back( edgeSize[0] );
8047 gp_XYZ newPos(0,0,0);
8049 for ( size_t i = 0; i < points.size(); ++i )
8051 newPos += points[i] * ( edgeSize[i] + edgeSize[i+1] );
8052 sumSize += edgeSize[i] + edgeSize[i+1];
8058 //================================================================================
8060 * \brief Computes a new node position using angular-based smoothing
8062 //================================================================================
8064 gp_XYZ _LayerEdge::smoothCentroidal()
8066 gp_XYZ newPos(0,0,0);
8067 gp_XYZ pN = SMESH_TNodeXYZ( _nodes.back() );
8069 for ( size_t i = 0; i < _simplices.size(); ++i )
8071 gp_XYZ p1 = SMESH_TNodeXYZ( _simplices[i]._nPrev );
8072 gp_XYZ p2 = SMESH_TNodeXYZ( _simplices[i]._nNext );
8073 gp_XYZ gc = ( pN + p1 + p2 ) / 3.;
8074 double size = (( p1 - pN ) ^ ( p2 - pN )).Modulus();
8077 newPos += gc * size;
8084 //================================================================================
8086 * \brief Computes a new node position located inside a Nef polygon
8088 //================================================================================
8090 gp_XYZ _LayerEdge::smoothNefPolygon()
8091 #ifdef OLD_NEF_POLYGON
8093 gp_XYZ newPos(0,0,0);
8095 // get a plane to seach a solution on
8097 vector< gp_XYZ > vecs( _simplices.size() + 1 );
8099 const double tol = numeric_limits<double>::min();
8100 gp_XYZ center(0,0,0);
8101 for ( i = 0; i < _simplices.size(); ++i )
8103 vecs[i] = ( SMESH_TNodeXYZ( _simplices[i]._nNext ) -
8104 SMESH_TNodeXYZ( _simplices[i]._nPrev ));
8105 center += SMESH_TNodeXYZ( _simplices[i]._nPrev );
8107 vecs.back() = vecs[0];
8108 center /= _simplices.size();
8110 gp_XYZ zAxis(0,0,0);
8111 for ( i = 0; i < _simplices.size(); ++i )
8112 zAxis += vecs[i] ^ vecs[i+1];
8115 for ( i = 0; i < _simplices.size(); ++i )
8118 if ( yAxis.SquareModulus() > tol )
8121 gp_XYZ xAxis = yAxis ^ zAxis;
8122 // SMESH_TNodeXYZ p0( _simplices[0]._nPrev );
8123 // const double tol = 1e-6 * ( p0.Distance( _simplices[1]._nPrev ) +
8124 // p0.Distance( _simplices[2]._nPrev ));
8125 // gp_XYZ center = smoothLaplacian();
8126 // gp_XYZ xAxis, yAxis, zAxis;
8127 // for ( i = 0; i < _simplices.size(); ++i )
8129 // xAxis = SMESH_TNodeXYZ( _simplices[i]._nPrev ) - center;
8130 // if ( xAxis.SquareModulus() > tol*tol )
8133 // for ( i = 1; i < _simplices.size(); ++i )
8135 // yAxis = SMESH_TNodeXYZ( _simplices[i]._nPrev ) - center;
8136 // zAxis = xAxis ^ yAxis;
8137 // if ( zAxis.SquareModulus() > tol*tol )
8140 // if ( i == _simplices.size() ) return newPos;
8142 yAxis = zAxis ^ xAxis;
8143 xAxis /= xAxis.Modulus();
8144 yAxis /= yAxis.Modulus();
8146 // get half-planes of _simplices
8148 vector< _halfPlane > halfPlns( _simplices.size() );
8150 for ( size_t i = 0; i < _simplices.size(); ++i )
8152 gp_XYZ OP1 = SMESH_TNodeXYZ( _simplices[i]._nPrev ) - center;
8153 gp_XYZ OP2 = SMESH_TNodeXYZ( _simplices[i]._nNext ) - center;
8154 gp_XY p1( OP1 * xAxis, OP1 * yAxis );
8155 gp_XY p2( OP2 * xAxis, OP2 * yAxis );
8156 gp_XY vec12 = p2 - p1;
8157 double dist12 = vec12.Modulus();
8161 halfPlns[ nbHP ]._pos = p1;
8162 halfPlns[ nbHP ]._dir = vec12;
8163 halfPlns[ nbHP ]._inNorm.SetCoord( -vec12.Y(), vec12.X() );
8167 // intersect boundaries of half-planes, define state of intersection points
8168 // in relation to all half-planes and calculate internal point of a 2D polygon
8171 gp_XY newPos2D (0,0);
8173 enum { UNDEF = -1, NOT_OUT, IS_OUT, NO_INT };
8174 typedef std::pair< gp_XY, int > TIntPntState; // coord and isOut state
8175 TIntPntState undefIPS( gp_XY(1e100,1e100), UNDEF );
8177 vector< vector< TIntPntState > > allIntPnts( nbHP );
8178 for ( int iHP1 = 0; iHP1 < nbHP; ++iHP1 )
8180 vector< TIntPntState > & intPnts1 = allIntPnts[ iHP1 ];
8181 if ( intPnts1.empty() ) intPnts1.resize( nbHP, undefIPS );
8183 int iPrev = SMESH_MesherHelper::WrapIndex( iHP1 - 1, nbHP );
8184 int iNext = SMESH_MesherHelper::WrapIndex( iHP1 + 1, nbHP );
8187 const gp_XY* segEnds[2] = { 0, 0 }; // NOT_OUT points
8189 for ( int iHP2 = 0; iHP2 < nbHP; ++iHP2 )
8191 if ( iHP1 == iHP2 ) continue;
8193 TIntPntState & ips1 = intPnts1[ iHP2 ];
8194 if ( ips1.second == UNDEF )
8196 // find an intersection point of boundaries of iHP1 and iHP2
8198 if ( iHP2 == iPrev ) // intersection with neighbors is known
8199 ips1.first = halfPlns[ iHP1 ]._pos;
8200 else if ( iHP2 == iNext )
8201 ips1.first = halfPlns[ iHP2 ]._pos;
8202 else if ( !halfPlns[ iHP1 ].FindIntersection( halfPlns[ iHP2 ], ips1.first ))
8203 ips1.second = NO_INT;
8205 // classify the found intersection point
8206 if ( ips1.second != NO_INT )
8208 ips1.second = NOT_OUT;
8209 for ( int i = 0; i < nbHP && ips1.second == NOT_OUT; ++i )
8210 if ( i != iHP1 && i != iHP2 &&
8211 halfPlns[ i ].IsOut( ips1.first, tol ))
8212 ips1.second = IS_OUT;
8214 vector< TIntPntState > & intPnts2 = allIntPnts[ iHP2 ];
8215 if ( intPnts2.empty() ) intPnts2.resize( nbHP, undefIPS );
8216 TIntPntState & ips2 = intPnts2[ iHP1 ];
8219 if ( ips1.second == NOT_OUT )
8222 segEnds[ bool(segEnds[0]) ] = & ips1.first;
8226 // find a NOT_OUT segment of boundary which is located between
8227 // two NOT_OUT int points
8230 continue; // no such a segment
8234 // sort points along the boundary
8235 map< double, TIntPntState* > ipsByParam;
8236 for ( int iHP2 = 0; iHP2 < nbHP; ++iHP2 )
8238 TIntPntState & ips1 = intPnts1[ iHP2 ];
8239 if ( ips1.second != NO_INT )
8241 gp_XY op = ips1.first - halfPlns[ iHP1 ]._pos;
8242 double param = op * halfPlns[ iHP1 ]._dir;
8243 ipsByParam.insert( make_pair( param, & ips1 ));
8246 // look for two neighboring NOT_OUT points
8248 map< double, TIntPntState* >::iterator u2ips = ipsByParam.begin();
8249 for ( ; u2ips != ipsByParam.end(); ++u2ips )
8251 TIntPntState & ips1 = *(u2ips->second);
8252 if ( ips1.second == NOT_OUT )
8253 segEnds[ bool( nbNotOut++ ) ] = & ips1.first;
8254 else if ( nbNotOut >= 2 )
8261 if ( nbNotOut >= 2 )
8263 double len = ( *segEnds[0] - *segEnds[1] ).Modulus();
8266 newPos2D += 0.5 * len * ( *segEnds[0] + *segEnds[1] );
8273 newPos = center + xAxis * newPos2D.X() + yAxis * newPos2D.Y();
8282 #else // OLD_NEF_POLYGON
8283 { ////////////////////////////////// NEW
8284 gp_XYZ newPos(0,0,0);
8286 // get a plane to seach a solution on
8289 gp_XYZ center(0,0,0);
8290 for ( i = 0; i < _simplices.size(); ++i )
8291 center += SMESH_TNodeXYZ( _simplices[i]._nPrev );
8292 center /= _simplices.size();
8294 vector< gp_XYZ > vecs( _simplices.size() + 1 );
8295 for ( i = 0; i < _simplices.size(); ++i )
8296 vecs[i] = SMESH_TNodeXYZ( _simplices[i]._nPrev ) - center;
8297 vecs.back() = vecs[0];
8299 const double tol = numeric_limits<double>::min();
8300 gp_XYZ zAxis(0,0,0);
8301 for ( i = 0; i < _simplices.size(); ++i )
8303 gp_XYZ cross = vecs[i] ^ vecs[i+1];
8306 if ( cross * zAxis < tol )
8307 zAxis += cross.Reversed();
8311 catch (Standard_Failure) { // if |cross| == 0.
8316 for ( i = 0; i < _simplices.size(); ++i )
8319 if ( yAxis.SquareModulus() > tol )
8322 gp_XYZ xAxis = yAxis ^ zAxis;
8323 // SMESH_TNodeXYZ p0( _simplices[0]._nPrev );
8324 // const double tol = 1e-6 * ( p0.Distance( _simplices[1]._nPrev ) +
8325 // p0.Distance( _simplices[2]._nPrev ));
8326 // gp_XYZ center = smoothLaplacian();
8327 // gp_XYZ xAxis, yAxis, zAxis;
8328 // for ( i = 0; i < _simplices.size(); ++i )
8330 // xAxis = SMESH_TNodeXYZ( _simplices[i]._nPrev ) - center;
8331 // if ( xAxis.SquareModulus() > tol*tol )
8334 // for ( i = 1; i < _simplices.size(); ++i )
8336 // yAxis = SMESH_TNodeXYZ( _simplices[i]._nPrev ) - center;
8337 // zAxis = xAxis ^ yAxis;
8338 // if ( zAxis.SquareModulus() > tol*tol )
8341 // if ( i == _simplices.size() ) return newPos;
8343 yAxis = zAxis ^ xAxis;
8344 xAxis /= xAxis.Modulus();
8345 yAxis /= yAxis.Modulus();
8347 // get half-planes of _simplices
8349 vector< _halfPlane > halfPlns( _simplices.size() );
8351 for ( size_t i = 0; i < _simplices.size(); ++i )
8353 const gp_XYZ& OP1 = vecs[ i ];
8354 const gp_XYZ& OP2 = vecs[ i+1 ];
8355 gp_XY p1( OP1 * xAxis, OP1 * yAxis );
8356 gp_XY p2( OP2 * xAxis, OP2 * yAxis );
8357 gp_XY vec12 = p2 - p1;
8358 double dist12 = vec12.Modulus();
8362 halfPlns[ nbHP ]._pos = p1;
8363 halfPlns[ nbHP ]._dir = vec12;
8364 halfPlns[ nbHP ]._inNorm.SetCoord( -vec12.Y(), vec12.X() );
8368 // intersect boundaries of half-planes, define state of intersection points
8369 // in relation to all half-planes and calculate internal point of a 2D polygon
8372 gp_XY newPos2D (0,0);
8374 enum { UNDEF = -1, NOT_OUT, IS_OUT, NO_INT };
8375 typedef std::pair< gp_XY, int > TIntPntState; // coord and isOut state
8376 TIntPntState undefIPS( gp_XY(1e100,1e100), UNDEF );
8378 vector< vector< TIntPntState > > allIntPnts( nbHP );
8379 for ( int iHP1 = 0; iHP1 < nbHP; ++iHP1 )
8381 vector< TIntPntState > & intPnts1 = allIntPnts[ iHP1 ];
8382 if ( intPnts1.empty() ) intPnts1.resize( nbHP, undefIPS );
8384 int iPrev = SMESH_MesherHelper::WrapIndex( iHP1 - 1, nbHP );
8385 int iNext = SMESH_MesherHelper::WrapIndex( iHP1 + 1, nbHP );
8388 const gp_XY* segEnds[2] = { 0, 0 }; // NOT_OUT points
8390 for ( int iHP2 = 0; iHP2 < nbHP; ++iHP2 )
8392 if ( iHP1 == iHP2 ) continue;
8394 TIntPntState & ips1 = intPnts1[ iHP2 ];
8395 if ( ips1.second == UNDEF )
8397 // find an intersection point of boundaries of iHP1 and iHP2
8399 if ( iHP2 == iPrev ) // intersection with neighbors is known
8400 ips1.first = halfPlns[ iHP1 ]._pos;
8401 else if ( iHP2 == iNext )
8402 ips1.first = halfPlns[ iHP2 ]._pos;
8403 else if ( !halfPlns[ iHP1 ].FindIntersection( halfPlns[ iHP2 ], ips1.first ))
8404 ips1.second = NO_INT;
8406 // classify the found intersection point
8407 if ( ips1.second != NO_INT )
8409 ips1.second = NOT_OUT;
8410 for ( int i = 0; i < nbHP && ips1.second == NOT_OUT; ++i )
8411 if ( i != iHP1 && i != iHP2 &&
8412 halfPlns[ i ].IsOut( ips1.first, tol ))
8413 ips1.second = IS_OUT;
8415 vector< TIntPntState > & intPnts2 = allIntPnts[ iHP2 ];
8416 if ( intPnts2.empty() ) intPnts2.resize( nbHP, undefIPS );
8417 TIntPntState & ips2 = intPnts2[ iHP1 ];
8420 if ( ips1.second == NOT_OUT )
8423 segEnds[ bool(segEnds[0]) ] = & ips1.first;
8427 // find a NOT_OUT segment of boundary which is located between
8428 // two NOT_OUT int points
8431 continue; // no such a segment
8435 // sort points along the boundary
8436 map< double, TIntPntState* > ipsByParam;
8437 for ( int iHP2 = 0; iHP2 < nbHP; ++iHP2 )
8439 TIntPntState & ips1 = intPnts1[ iHP2 ];
8440 if ( ips1.second != NO_INT )
8442 gp_XY op = ips1.first - halfPlns[ iHP1 ]._pos;
8443 double param = op * halfPlns[ iHP1 ]._dir;
8444 ipsByParam.insert( make_pair( param, & ips1 ));
8447 // look for two neighboring NOT_OUT points
8449 map< double, TIntPntState* >::iterator u2ips = ipsByParam.begin();
8450 for ( ; u2ips != ipsByParam.end(); ++u2ips )
8452 TIntPntState & ips1 = *(u2ips->second);
8453 if ( ips1.second == NOT_OUT )
8454 segEnds[ bool( nbNotOut++ ) ] = & ips1.first;
8455 else if ( nbNotOut >= 2 )
8462 if ( nbNotOut >= 2 )
8464 double len = ( *segEnds[0] - *segEnds[1] ).Modulus();
8467 newPos2D += 0.5 * len * ( *segEnds[0] + *segEnds[1] );
8474 newPos = center + xAxis * newPos2D.X() + yAxis * newPos2D.Y();
8483 #endif // OLD_NEF_POLYGON
8485 //================================================================================
8487 * \brief Add a new segment to _LayerEdge during inflation
8489 //================================================================================
8491 void _LayerEdge::SetNewLength( double len, _EdgesOnShape& eos, SMESH_MesherHelper& helper )
8496 if ( len > _maxLen )
8499 Block( eos.GetData() );
8501 const double lenDelta = len - _len;
8502 if ( lenDelta < len * 1e-3 )
8504 Block( eos.GetData() );
8508 SMDS_MeshNode* n = const_cast< SMDS_MeshNode*>( _nodes.back() );
8509 gp_XYZ oldXYZ = SMESH_TNodeXYZ( n );
8511 if ( eos._hyp.IsOffsetMethod() )
8515 SMDS_ElemIteratorPtr faceIt = _nodes[0]->GetInverseElementIterator( SMDSAbs_Face );
8516 while ( faceIt->more() )
8518 const SMDS_MeshElement* face = faceIt->next();
8519 if ( !eos.GetNormal( face, faceNorm ))
8522 // translate plane of a face
8523 gp_XYZ baryCenter = oldXYZ + faceNorm.XYZ() * lenDelta;
8525 // find point of intersection of the face plane located at baryCenter
8526 // and _normal located at newXYZ
8527 double d = -( faceNorm.XYZ() * baryCenter ); // d of plane equation ax+by+cz+d=0
8528 double dot = ( faceNorm.XYZ() * _normal );
8529 if ( dot < std::numeric_limits<double>::min() )
8530 dot = lenDelta * 1e-3;
8531 double step = -( faceNorm.XYZ() * newXYZ + d ) / dot;
8532 newXYZ += step * _normal;
8537 newXYZ = oldXYZ + _normal * lenDelta * _lenFactor;
8540 n->setXYZ( newXYZ.X(), newXYZ.Y(), newXYZ.Z() );
8541 _pos.push_back( newXYZ );
8543 if ( !eos._sWOL.IsNull() )
8547 if ( eos.SWOLType() == TopAbs_EDGE )
8549 double u = Precision::Infinite(); // to force projection w/o distance check
8550 uvOK = helper.CheckNodeU( TopoDS::Edge( eos._sWOL ), n, u,
8551 /*tol=*/2*lenDelta, /*force=*/true, distXYZ );
8552 _pos.back().SetCoord( u, 0, 0 );
8553 if ( _nodes.size() > 1 && uvOK )
8555 SMDS_EdgePosition* pos = static_cast<SMDS_EdgePosition*>( n->GetPosition() );
8556 pos->SetUParameter( u );
8561 gp_XY uv( Precision::Infinite(), 0 );
8562 uvOK = helper.CheckNodeUV( TopoDS::Face( eos._sWOL ), n, uv,
8563 /*tol=*/2*lenDelta, /*force=*/true, distXYZ );
8564 _pos.back().SetCoord( uv.X(), uv.Y(), 0 );
8565 if ( _nodes.size() > 1 && uvOK )
8567 SMDS_FacePosition* pos = static_cast<SMDS_FacePosition*>( n->GetPosition() );
8568 pos->SetUParameter( uv.X() );
8569 pos->SetVParameter( uv.Y() );
8574 n->setXYZ( distXYZ[1], distXYZ[2], distXYZ[3]);
8578 n->setXYZ( oldXYZ.X(), oldXYZ.Y(), oldXYZ.Z() );
8580 Block( eos.GetData() );
8588 if ( eos.ShapeType() != TopAbs_FACE )
8590 for ( size_t i = 0; i < _neibors.size(); ++i )
8591 //if ( _len > _neibors[i]->GetSmooLen() )
8592 _neibors[i]->Set( MOVED );
8596 dumpMove( n ); //debug
8599 //================================================================================
8601 * \brief Set BLOCKED flag and propagate limited _maxLen to _neibors
8603 //================================================================================
8605 void _LayerEdge::Block( _SolidData& data )
8607 if ( Is( BLOCKED )) return;
8611 std::queue<_LayerEdge*> queue;
8614 gp_Pnt pSrc, pTgt, pSrcN, pTgtN;
8615 while ( !queue.empty() )
8617 _LayerEdge* edge = queue.front(); queue.pop();
8618 pSrc = SMESH_TNodeXYZ( edge->_nodes[0] );
8619 pTgt = SMESH_TNodeXYZ( edge->_nodes.back() );
8620 for ( size_t iN = 0; iN < edge->_neibors.size(); ++iN )
8622 _LayerEdge* neibor = edge->_neibors[iN];
8623 if ( neibor->Is( BLOCKED ) ||
8624 neibor->_maxLen < edge->_maxLen )
8626 pSrcN = SMESH_TNodeXYZ( neibor->_nodes[0] );
8627 pTgtN = SMESH_TNodeXYZ( neibor->_nodes.back() );
8628 double minDist = pSrc.SquareDistance( pSrcN );
8629 minDist = Min( pTgt.SquareDistance( pTgtN ), minDist );
8630 minDist = Min( pSrc.SquareDistance( pTgtN ), minDist );
8631 minDist = Min( pTgt.SquareDistance( pSrcN ), minDist );
8632 double newMaxLen = edge->_maxLen + 0.5 * Sqrt( minDist );
8633 if ( neibor->_maxLen > newMaxLen )
8635 neibor->_maxLen = newMaxLen;
8636 if ( neibor->_maxLen < neibor->_len )
8638 _EdgesOnShape* eos = data.GetShapeEdges( neibor );
8639 neibor->InvalidateStep( neibor->NbSteps(), *eos, /*restoreLength=*/true );
8640 neibor->SetNewLength( neibor->_maxLen, *eos, data.GetHelper() );
8642 queue.push( neibor );
8648 //================================================================================
8650 * \brief Remove last inflation step
8652 //================================================================================
8654 void _LayerEdge::InvalidateStep( size_t curStep, const _EdgesOnShape& eos, bool restoreLength )
8656 if ( _pos.size() > curStep && _nodes.size() > 1 )
8658 _pos.resize( curStep );
8660 gp_Pnt nXYZ = _pos.back();
8661 SMDS_MeshNode* n = const_cast< SMDS_MeshNode*>( _nodes.back() );
8662 SMESH_TNodeXYZ curXYZ( n );
8663 if ( !eos._sWOL.IsNull() )
8665 TopLoc_Location loc;
8666 if ( eos.SWOLType() == TopAbs_EDGE )
8668 SMDS_EdgePosition* pos = static_cast<SMDS_EdgePosition*>( n->GetPosition() );
8669 pos->SetUParameter( nXYZ.X() );
8671 Handle(Geom_Curve) curve = BRep_Tool::Curve( TopoDS::Edge( eos._sWOL ), loc, f,l);
8672 nXYZ = curve->Value( nXYZ.X() ).Transformed( loc );
8676 SMDS_FacePosition* pos = static_cast<SMDS_FacePosition*>( n->GetPosition() );
8677 pos->SetUParameter( nXYZ.X() );
8678 pos->SetVParameter( nXYZ.Y() );
8679 Handle(Geom_Surface) surface = BRep_Tool::Surface( TopoDS::Face(eos._sWOL), loc );
8680 nXYZ = surface->Value( nXYZ.X(), nXYZ.Y() ).Transformed( loc );
8683 n->setXYZ( nXYZ.X(), nXYZ.Y(), nXYZ.Z() );
8686 if ( restoreLength )
8688 _len -= ( nXYZ.XYZ() - curXYZ ).Modulus() / _lenFactor;
8693 //================================================================================
8695 * \brief Smooth a path formed by _pos of a _LayerEdge smoothed on FACE
8697 //================================================================================
8699 void _LayerEdge::SmoothPos( const vector< double >& segLen, const double tol )
8702 if ( Is( NORMAL_UPDATED ) || _pos.size() <= 2 )
8705 // find the 1st smoothed _pos
8707 for ( size_t i = 1; i < _pos.size() && !iSmoothed; ++i )
8709 double normDist = ( _pos[i] - _pos[0] ).Crossed( _normal ).SquareModulus();
8710 if ( normDist > tol * tol )
8713 if ( !iSmoothed ) return;
8715 if ( 1 || Is( DISTORTED ))
8717 // if ( segLen[ iSmoothed ] / segLen.back() < 0.5 )
8719 for ( size_t i = Max( 1, iSmoothed-1 ); i < _pos.size()-1; ++i )
8721 gp_XYZ midPos = 0.5 * ( _pos[i-1] + _pos[i+1] );
8722 gp_XYZ newPos = 0.5 * ( midPos + _pos[i] );
8724 double midLen = 0.5 * ( segLen[i-1] + segLen[i+1] );
8725 double newLen = 0.5 * ( midLen + segLen[i] );
8726 const_cast< double& >( segLen[i] ) = newLen;
8731 for ( size_t i = 1; i < _pos.size()-1; ++i )
8733 if ((int) i < iSmoothed && ( segLen[i] / segLen.back() < 0.5 ))
8736 double wgt = segLen[i] / segLen.back();
8737 gp_XYZ normPos = _pos[0] + _normal * wgt * _len;
8738 gp_XYZ tgtPos = ( 1 - wgt ) * _pos[0] + wgt * _pos.back();
8739 gp_XYZ newPos = ( 1 - wgt ) * normPos + wgt * tgtPos;
8745 //================================================================================
8747 * \brief Create layers of prisms
8749 //================================================================================
8751 bool _ViscousBuilder::refine(_SolidData& data)
8753 SMESH_MesherHelper& helper = data.GetHelper();
8754 helper.SetElementsOnShape(false);
8756 Handle(Geom_Curve) curve;
8757 Handle(ShapeAnalysis_Surface) surface;
8758 TopoDS_Edge geomEdge;
8759 TopoDS_Face geomFace;
8760 TopLoc_Location loc;
8763 vector< gp_XYZ > pos3D;
8765 TGeomID prevBaseId = -1;
8766 TNode2Edge* n2eMap = 0;
8767 TNode2Edge::iterator n2e;
8769 // Create intermediate nodes on each _LayerEdge
8771 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
8773 _EdgesOnShape& eos = data._edgesOnShape[iS];
8774 if ( eos._edges.empty() ) continue;
8776 if ( eos._edges[0]->_nodes.size() < 2 )
8777 continue; // on _noShrinkShapes
8779 // get data of a shrink shape
8781 geomEdge.Nullify(); geomFace.Nullify();
8782 curve.Nullify(); surface.Nullify();
8783 if ( !eos._sWOL.IsNull() )
8785 isOnEdge = ( eos.SWOLType() == TopAbs_EDGE );
8788 geomEdge = TopoDS::Edge( eos._sWOL );
8789 curve = BRep_Tool::Curve( geomEdge, loc, f,l);
8793 geomFace = TopoDS::Face( eos._sWOL );
8794 surface = helper.GetSurface( geomFace );
8797 else if ( eos.ShapeType() == TopAbs_FACE && eos._toSmooth )
8799 geomFace = TopoDS::Face( eos._shape );
8800 surface = helper.GetSurface( geomFace );
8801 // propagate _toSmooth back to _eosC1, which was unset in findShapesToSmooth()
8802 for ( size_t i = 0; i < eos._eosC1.size(); ++i )
8804 eos._eosC1[ i ]->_toSmooth = true;
8805 for ( size_t j = 0; j < eos._eosC1[i]->_edges.size(); ++j )
8806 eos._eosC1[i]->_edges[j]->Set( _LayerEdge::SMOOTHED_C1 );
8810 vector< double > segLen;
8811 for ( size_t i = 0; i < eos._edges.size(); ++i )
8813 _LayerEdge& edge = *eos._edges[i];
8814 if ( edge._pos.size() < 2 )
8817 // get accumulated length of segments
8818 segLen.resize( edge._pos.size() );
8820 if ( eos._sWOL.IsNull() )
8822 bool useNormal = true;
8823 bool usePos = false;
8824 bool smoothed = false;
8825 const double preci = 0.1 * edge._len;
8826 if ( eos._toSmooth )
8828 gp_Pnt tgtExpected = edge._pos[0] + edge._normal * edge._len;
8829 smoothed = tgtExpected.SquareDistance( edge._pos.back() ) > preci * preci;
8833 if ( !surface.IsNull() &&
8834 !data._convexFaces.count( eos._shapeID )) // edge smoothed on FACE
8836 useNormal = usePos = false;
8837 gp_Pnt2d uv = helper.GetNodeUV( geomFace, edge._nodes[0] );
8838 for ( size_t j = 1; j < edge._pos.size() && !useNormal; ++j )
8840 uv = surface->NextValueOfUV( uv, edge._pos[j], preci );
8841 if ( surface->Gap() < 2. * edge._len )
8842 segLen[j] = surface->Gap();
8850 useNormal = usePos = false;
8851 edge._pos[1] = edge._pos.back();
8852 edge._pos.resize( 2 );
8854 segLen[ 1 ] = edge._len;
8856 if ( useNormal && edge.Is( _LayerEdge::NORMAL_UPDATED ))
8858 useNormal = usePos = false;
8859 _LayerEdge tmpEdge; // get original _normal
8860 tmpEdge._nodes.push_back( edge._nodes[0] );
8861 if ( !setEdgeData( tmpEdge, eos, helper, data ))
8864 for ( size_t j = 1; j < edge._pos.size(); ++j )
8865 segLen[j] = ( edge._pos[j] - edge._pos[0] ) * tmpEdge._normal;
8869 for ( size_t j = 1; j < edge._pos.size(); ++j )
8870 segLen[j] = ( edge._pos[j] - edge._pos[0] ) * edge._normal;
8874 for ( size_t j = 1; j < edge._pos.size(); ++j )
8875 segLen[j] = segLen[j-1] + ( edge._pos[j-1] - edge._pos[j] ).Modulus();
8879 bool swapped = ( edge._pos.size() > 2 );
8883 for ( size_t j = 1; j < edge._pos.size(); ++j )
8884 if ( segLen[j] < segLen[j-1] )
8886 std::swap( segLen[j], segLen[j-1] );
8887 std::swap( edge._pos[j], edge._pos[j-1] );
8892 // smooth a path formed by edge._pos
8894 ( eos.ShapeType() == TopAbs_FACE || edge.Is( _LayerEdge::SMOOTHED_C1 )))
8895 edge.SmoothPos( segLen, preci );
8897 else if ( eos._isRegularSWOL ) // usual SWOL
8899 for ( size_t j = 1; j < edge._pos.size(); ++j )
8900 segLen[j] = segLen[j-1] + (edge._pos[j-1] - edge._pos[j] ).Modulus();
8902 else if ( !surface.IsNull() ) // SWOL surface with singularities
8904 pos3D.resize( edge._pos.size() );
8905 for ( size_t j = 0; j < edge._pos.size(); ++j )
8906 pos3D[j] = surface->Value( edge._pos[j].X(), edge._pos[j].Y() ).XYZ();
8908 for ( size_t j = 1; j < edge._pos.size(); ++j )
8909 segLen[j] = segLen[j-1] + ( pos3D[j-1] - pos3D[j] ).Modulus();
8912 // allocate memory for new nodes if it is not yet refined
8913 const SMDS_MeshNode* tgtNode = edge._nodes.back();
8914 if ( edge._nodes.size() == 2 )
8916 edge._nodes.resize( eos._hyp.GetNumberLayers() + 1, 0 );
8918 edge._nodes.back() = tgtNode;
8920 // restore shapePos of the last node by already treated _LayerEdge of another _SolidData
8921 const TGeomID baseShapeId = edge._nodes[0]->getshapeId();
8922 if ( baseShapeId != prevBaseId )
8924 map< TGeomID, TNode2Edge* >::iterator s2ne = data._s2neMap.find( baseShapeId );
8925 n2eMap = ( s2ne == data._s2neMap.end() ) ? 0 : s2ne->second;
8926 prevBaseId = baseShapeId;
8928 _LayerEdge* edgeOnSameNode = 0;
8929 bool useExistingPos = false;
8930 if ( n2eMap && (( n2e = n2eMap->find( edge._nodes[0] )) != n2eMap->end() ))
8932 edgeOnSameNode = n2e->second;
8933 useExistingPos = ( edgeOnSameNode->_len < edge._len );
8934 const gp_XYZ& otherTgtPos = edgeOnSameNode->_pos.back();
8935 SMDS_PositionPtr lastPos = tgtNode->GetPosition();
8938 SMDS_EdgePosition* epos = static_cast<SMDS_EdgePosition*>( lastPos );
8939 epos->SetUParameter( otherTgtPos.X() );
8943 SMDS_FacePosition* fpos = static_cast<SMDS_FacePosition*>( lastPos );
8944 fpos->SetUParameter( otherTgtPos.X() );
8945 fpos->SetVParameter( otherTgtPos.Y() );
8948 // calculate height of the first layer
8950 const double T = segLen.back(); //data._hyp.GetTotalThickness();
8951 const double f = eos._hyp.GetStretchFactor();
8952 const int N = eos._hyp.GetNumberLayers();
8953 const double fPowN = pow( f, N );
8954 if ( fPowN - 1 <= numeric_limits<double>::min() )
8957 h0 = T * ( f - 1 )/( fPowN - 1 );
8959 const double zeroLen = std::numeric_limits<double>::min();
8961 // create intermediate nodes
8962 double hSum = 0, hi = h0/f;
8964 for ( size_t iStep = 1; iStep < edge._nodes.size(); ++iStep )
8966 // compute an intermediate position
8969 while ( hSum > segLen[iSeg] && iSeg < segLen.size()-1 )
8971 int iPrevSeg = iSeg-1;
8972 while ( fabs( segLen[iPrevSeg] - segLen[iSeg]) <= zeroLen && iPrevSeg > 0 )
8974 double r = ( segLen[iSeg] - hSum ) / ( segLen[iSeg] - segLen[iPrevSeg] );
8975 gp_Pnt pos = r * edge._pos[iPrevSeg] + (1-r) * edge._pos[iSeg];
8977 SMDS_MeshNode*& node = const_cast< SMDS_MeshNode*& >( edge._nodes[ iStep ]);
8978 if ( !eos._sWOL.IsNull() )
8980 // compute XYZ by parameters <pos>
8985 pos = curve->Value( u ).Transformed(loc);
8987 else if ( eos._isRegularSWOL )
8989 uv.SetCoord( pos.X(), pos.Y() );
8991 pos = surface->Value( pos.X(), pos.Y() );
8995 uv.SetCoord( pos.X(), pos.Y() );
8996 gp_Pnt p = r * pos3D[ iPrevSeg ] + (1-r) * pos3D[ iSeg ];
8997 uv = surface->NextValueOfUV( uv, p, BRep_Tool::Tolerance( geomFace )).XY();
8999 pos = surface->Value( uv );
9002 // create or update the node
9005 node = helper.AddNode( pos.X(), pos.Y(), pos.Z());
9006 if ( !eos._sWOL.IsNull() )
9009 getMeshDS()->SetNodeOnEdge( node, geomEdge, u );
9011 getMeshDS()->SetNodeOnFace( node, geomFace, uv.X(), uv.Y() );
9015 getMeshDS()->SetNodeInVolume( node, helper.GetSubShapeID() );
9020 if ( !eos._sWOL.IsNull() )
9022 // make average pos from new and current parameters
9025 //u = 0.5 * ( u + helper.GetNodeU( geomEdge, node ));
9026 if ( useExistingPos )
9027 u = helper.GetNodeU( geomEdge, node );
9028 pos = curve->Value( u ).Transformed(loc);
9030 SMDS_EdgePosition* epos = static_cast<SMDS_EdgePosition*>( node->GetPosition() );
9031 epos->SetUParameter( u );
9035 //uv = 0.5 * ( uv + helper.GetNodeUV( geomFace, node ));
9036 if ( useExistingPos )
9037 uv = helper.GetNodeUV( geomFace, node );
9038 pos = surface->Value( uv );
9040 SMDS_FacePosition* fpos = static_cast<SMDS_FacePosition*>( node->GetPosition() );
9041 fpos->SetUParameter( uv.X() );
9042 fpos->SetVParameter( uv.Y() );
9045 node->setXYZ( pos.X(), pos.Y(), pos.Z() );
9047 } // loop on edge._nodes
9049 if ( !eos._sWOL.IsNull() ) // prepare for shrink()
9052 edge._pos.back().SetCoord( u, 0,0);
9054 edge._pos.back().SetCoord( uv.X(), uv.Y() ,0);
9056 if ( edgeOnSameNode )
9057 edgeOnSameNode->_pos.back() = edge._pos.back();
9060 } // loop on eos._edges to create nodes
9063 if ( !getMeshDS()->IsEmbeddedMode() )
9064 // Log node movement
9065 for ( size_t i = 0; i < eos._edges.size(); ++i )
9067 SMESH_TNodeXYZ p ( eos._edges[i]->_nodes.back() );
9068 getMeshDS()->MoveNode( p._node, p.X(), p.Y(), p.Z() );
9075 helper.SetElementsOnShape(true);
9077 vector< vector<const SMDS_MeshNode*>* > nnVec;
9078 set< vector<const SMDS_MeshNode*>* > nnSet;
9079 set< int > degenEdgeInd;
9080 vector<const SMDS_MeshElement*> degenVols;
9081 vector<int> isRiskySWOL;
9083 TopExp_Explorer exp( data._solid, TopAbs_FACE );
9084 for ( ; exp.More(); exp.Next() )
9086 const TGeomID faceID = getMeshDS()->ShapeToIndex( exp.Current() );
9087 if ( data._ignoreFaceIds.count( faceID ))
9089 const bool isReversedFace = data._reversedFaceIds.count( faceID );
9090 SMESHDS_SubMesh* fSubM = getMeshDS()->MeshElements( exp.Current() );
9091 SMDS_ElemIteratorPtr fIt = fSubM->GetElements();
9092 while ( fIt->more() )
9094 const SMDS_MeshElement* face = fIt->next();
9095 const int nbNodes = face->NbCornerNodes();
9096 nnVec.resize( nbNodes );
9098 degenEdgeInd.clear();
9099 isRiskySWOL.resize( nbNodes );
9100 size_t maxZ = 0, minZ = std::numeric_limits<size_t>::max();
9101 SMDS_NodeIteratorPtr nIt = face->nodeIterator();
9102 for ( int iN = 0; iN < nbNodes; ++iN )
9104 const SMDS_MeshNode* n = nIt->next();
9105 _LayerEdge* edge = data._n2eMap[ n ];
9106 const int i = isReversedFace ? nbNodes-1-iN : iN;
9107 nnVec[ i ] = & edge->_nodes;
9108 maxZ = std::max( maxZ, nnVec[ i ]->size() );
9109 minZ = std::min( minZ, nnVec[ i ]->size() );
9110 //isRiskySWOL[ i ] = edge->Is( _LayerEdge::RISKY_SWOL );
9112 if ( helper.HasDegeneratedEdges() )
9113 nnSet.insert( nnVec[ i ]);
9118 if ( 0 < nnSet.size() && nnSet.size() < 3 )
9126 for ( size_t iZ = 1; iZ < minZ; ++iZ )
9127 helper.AddVolume( (*nnVec[0])[iZ-1], (*nnVec[1])[iZ-1], (*nnVec[2])[iZ-1],
9128 (*nnVec[0])[iZ], (*nnVec[1])[iZ], (*nnVec[2])[iZ]);
9130 for ( size_t iZ = minZ; iZ < maxZ; ++iZ )
9132 for ( int iN = 0; iN < nbNodes; ++iN )
9133 if ( nnVec[ iN ]->size() < iZ+1 )
9134 degenEdgeInd.insert( iN );
9136 if ( degenEdgeInd.size() == 1 ) // PYRAM
9138 int i2 = *degenEdgeInd.begin();
9139 int i0 = helper.WrapIndex( i2 - 1, nbNodes );
9140 int i1 = helper.WrapIndex( i2 + 1, nbNodes );
9141 helper.AddVolume( (*nnVec[i0])[iZ-1], (*nnVec[i1])[iZ-1],
9142 (*nnVec[i1])[iZ ], (*nnVec[i0])[iZ ], (*nnVec[i2]).back());
9146 int i3 = !degenEdgeInd.count(0) ? 0 : !degenEdgeInd.count(1) ? 1 : 2;
9147 helper.AddVolume( (*nnVec[ 0 ])[ i3 == 0 ? iZ-1 : nnVec[0]->size()-1 ],
9148 (*nnVec[ 1 ])[ i3 == 1 ? iZ-1 : nnVec[1]->size()-1 ],
9149 (*nnVec[ 2 ])[ i3 == 2 ? iZ-1 : nnVec[2]->size()-1 ],
9150 (*nnVec[ i3 ])[ iZ ]);
9158 for ( size_t iZ = 1; iZ < minZ; ++iZ )
9159 helper.AddVolume( (*nnVec[0])[iZ-1], (*nnVec[1])[iZ-1],
9160 (*nnVec[2])[iZ-1], (*nnVec[3])[iZ-1],
9161 (*nnVec[0])[iZ], (*nnVec[1])[iZ],
9162 (*nnVec[2])[iZ], (*nnVec[3])[iZ]);
9164 for ( size_t iZ = minZ; iZ < maxZ; ++iZ )
9166 for ( int iN = 0; iN < nbNodes; ++iN )
9167 if ( nnVec[ iN ]->size() < iZ+1 )
9168 degenEdgeInd.insert( iN );
9170 switch ( degenEdgeInd.size() )
9174 int i2 = *degenEdgeInd.begin();
9175 int i3 = *degenEdgeInd.rbegin();
9176 bool ok = ( i3 - i2 == 1 );
9177 if ( i2 == 0 && i3 == 3 ) { i2 = 3; i3 = 0; ok = true; }
9178 int i0 = helper.WrapIndex( i3 + 1, nbNodes );
9179 int i1 = helper.WrapIndex( i0 + 1, nbNodes );
9181 const SMDS_MeshElement* vol =
9182 helper.AddVolume( nnVec[i3]->back(), (*nnVec[i0])[iZ], (*nnVec[i0])[iZ-1],
9183 nnVec[i2]->back(), (*nnVec[i1])[iZ], (*nnVec[i1])[iZ-1]);
9185 degenVols.push_back( vol );
9189 default: // degen HEX
9191 const SMDS_MeshElement* vol =
9192 helper.AddVolume( nnVec[0]->size() > iZ-1 ? (*nnVec[0])[iZ-1] : nnVec[0]->back(),
9193 nnVec[1]->size() > iZ-1 ? (*nnVec[1])[iZ-1] : nnVec[1]->back(),
9194 nnVec[2]->size() > iZ-1 ? (*nnVec[2])[iZ-1] : nnVec[2]->back(),
9195 nnVec[3]->size() > iZ-1 ? (*nnVec[3])[iZ-1] : nnVec[3]->back(),
9196 nnVec[0]->size() > iZ ? (*nnVec[0])[iZ] : nnVec[0]->back(),
9197 nnVec[1]->size() > iZ ? (*nnVec[1])[iZ] : nnVec[1]->back(),
9198 nnVec[2]->size() > iZ ? (*nnVec[2])[iZ] : nnVec[2]->back(),
9199 nnVec[3]->size() > iZ ? (*nnVec[3])[iZ] : nnVec[3]->back());
9200 degenVols.push_back( vol );
9207 return error("Not supported type of element", data._index);
9209 } // switch ( nbNodes )
9210 } // while ( fIt->more() )
9213 if ( !degenVols.empty() )
9215 SMESH_ComputeErrorPtr& err = _mesh->GetSubMesh( data._solid )->GetComputeError();
9216 if ( !err || err->IsOK() )
9218 err.reset( new SMESH_ComputeError( COMPERR_WARNING,
9219 "Degenerated volumes created" ));
9220 err->myBadElements.insert( err->myBadElements.end(),
9221 degenVols.begin(),degenVols.end() );
9228 //================================================================================
9230 * \brief Shrink 2D mesh on faces to let space for inflated layers
9232 //================================================================================
9234 bool _ViscousBuilder::shrink()
9236 // make map of (ids of FACEs to shrink mesh on) to (_SolidData containing _LayerEdge's
9237 // inflated along FACE or EDGE)
9238 map< TGeomID, _SolidData* > f2sdMap;
9239 for ( size_t i = 0 ; i < _sdVec.size(); ++i )
9241 _SolidData& data = _sdVec[i];
9242 TopTools_MapOfShape FFMap;
9243 map< TGeomID, TopoDS_Shape >::iterator s2s = data._shrinkShape2Shape.begin();
9244 for (; s2s != data._shrinkShape2Shape.end(); ++s2s )
9245 if ( s2s->second.ShapeType() == TopAbs_FACE )
9247 f2sdMap.insert( make_pair( getMeshDS()->ShapeToIndex( s2s->second ), &data ));
9249 if ( FFMap.Add( (*s2s).second ))
9250 // Put mesh faces on the shrinked FACE to the proxy sub-mesh to avoid
9251 // usage of mesh faces made in addBoundaryElements() by the 3D algo or
9252 // by StdMeshers_QuadToTriaAdaptor
9253 if ( SMESHDS_SubMesh* smDS = getMeshDS()->MeshElements( s2s->second ))
9255 SMESH_ProxyMesh::SubMesh* proxySub =
9256 data._proxyMesh->getFaceSubM( TopoDS::Face( s2s->second ), /*create=*/true);
9257 SMDS_ElemIteratorPtr fIt = smDS->GetElements();
9258 while ( fIt->more() )
9259 proxySub->AddElement( fIt->next() );
9260 // as a result 3D algo will use elements from proxySub and not from smDS
9265 SMESH_MesherHelper helper( *_mesh );
9266 helper.ToFixNodeParameters( true );
9269 map< TGeomID, _Shrinker1D > e2shrMap;
9270 vector< _EdgesOnShape* > subEOS;
9271 vector< _LayerEdge* > lEdges;
9273 // loop on FACES to srink mesh on
9274 map< TGeomID, _SolidData* >::iterator f2sd = f2sdMap.begin();
9275 for ( ; f2sd != f2sdMap.end(); ++f2sd )
9277 _SolidData& data = *f2sd->second;
9278 const TopoDS_Face& F = TopoDS::Face( getMeshDS()->IndexToShape( f2sd->first ));
9279 SMESH_subMesh* sm = _mesh->GetSubMesh( F );
9280 SMESHDS_SubMesh* smDS = sm->GetSubMeshDS();
9282 Handle(Geom_Surface) surface = BRep_Tool::Surface(F);
9284 helper.SetSubShape(F);
9286 // ===========================
9287 // Prepare data for shrinking
9288 // ===========================
9290 // Collect nodes to smooth, as src nodes are not yet replaced by tgt ones
9291 // and hence all nodes on a FACE connected to 2d elements are to be smoothed
9292 vector < const SMDS_MeshNode* > smoothNodes;
9294 SMDS_NodeIteratorPtr nIt = smDS->GetNodes();
9295 while ( nIt->more() )
9297 const SMDS_MeshNode* n = nIt->next();
9298 if ( n->NbInverseElements( SMDSAbs_Face ) > 0 )
9299 smoothNodes.push_back( n );
9302 // Find out face orientation
9304 const set<TGeomID> ignoreShapes;
9306 if ( !smoothNodes.empty() )
9308 vector<_Simplex> simplices;
9309 _Simplex::GetSimplices( smoothNodes[0], simplices, ignoreShapes );
9310 helper.GetNodeUV( F, simplices[0]._nPrev, 0, &isOkUV ); // fix UV of silpmex nodes
9311 helper.GetNodeUV( F, simplices[0]._nNext, 0, &isOkUV );
9312 gp_XY uv = helper.GetNodeUV( F, smoothNodes[0], 0, &isOkUV );
9313 if ( !simplices[0].IsForward(uv, smoothNodes[0], F, helper,refSign) )
9317 // Find _LayerEdge's inflated along F
9321 SMESH_subMeshIteratorPtr subIt = sm->getDependsOnIterator(/*includeSelf=*/false,
9322 /*complexFirst=*/true); //!!!
9323 while ( subIt->more() )
9325 const TGeomID subID = subIt->next()->GetId();
9326 if ( data._noShrinkShapes.count( subID ))
9328 _EdgesOnShape* eos = data.GetShapeEdges( subID );
9329 if ( !eos || eos->_sWOL.IsNull() ) continue;
9331 subEOS.push_back( eos );
9333 for ( size_t i = 0; i < eos->_edges.size(); ++i )
9335 lEdges.push_back( eos->_edges[ i ] );
9336 prepareEdgeToShrink( *eos->_edges[ i ], *eos, helper, smDS );
9341 dumpFunction(SMESH_Comment("beforeShrinkFace")<<f2sd->first); // debug
9342 SMDS_ElemIteratorPtr fIt = smDS->GetElements();
9343 while ( fIt->more() )
9344 if ( const SMDS_MeshElement* f = fIt->next() )
9345 dumpChangeNodes( f );
9348 // Replace source nodes by target nodes in mesh faces to shrink
9349 dumpFunction(SMESH_Comment("replNodesOnFace")<<f2sd->first); // debug
9350 const SMDS_MeshNode* nodes[20];
9351 for ( size_t iS = 0; iS < subEOS.size(); ++iS )
9353 _EdgesOnShape& eos = * subEOS[ iS ];
9354 for ( size_t i = 0; i < eos._edges.size(); ++i )
9356 _LayerEdge& edge = *eos._edges[i];
9357 const SMDS_MeshNode* srcNode = edge._nodes[0];
9358 const SMDS_MeshNode* tgtNode = edge._nodes.back();
9359 SMDS_ElemIteratorPtr fIt = srcNode->GetInverseElementIterator(SMDSAbs_Face);
9360 while ( fIt->more() )
9362 const SMDS_MeshElement* f = fIt->next();
9363 if ( !smDS->Contains( f ))
9365 SMDS_NodeIteratorPtr nIt = f->nodeIterator();
9366 for ( int iN = 0; nIt->more(); ++iN )
9368 const SMDS_MeshNode* n = nIt->next();
9369 nodes[iN] = ( n == srcNode ? tgtNode : n );
9371 helper.GetMeshDS()->ChangeElementNodes( f, nodes, f->NbNodes() );
9372 dumpChangeNodes( f );
9378 // find out if a FACE is concave
9379 const bool isConcaveFace = isConcave( F, helper );
9381 // Create _SmoothNode's on face F
9382 vector< _SmoothNode > nodesToSmooth( smoothNodes.size() );
9384 dumpFunction(SMESH_Comment("fixUVOnFace")<<f2sd->first); // debug
9385 const bool sortSimplices = isConcaveFace;
9386 for ( size_t i = 0; i < smoothNodes.size(); ++i )
9388 const SMDS_MeshNode* n = smoothNodes[i];
9389 nodesToSmooth[ i ]._node = n;
9390 // src nodes must be replaced by tgt nodes to have tgt nodes in _simplices
9391 _Simplex::GetSimplices( n, nodesToSmooth[ i ]._simplices, ignoreShapes, 0, sortSimplices);
9392 // fix up incorrect uv of nodes on the FACE
9393 helper.GetNodeUV( F, n, 0, &isOkUV);
9398 //if ( nodesToSmooth.empty() ) continue;
9400 // Find EDGE's to shrink and set simpices to LayerEdge's
9401 set< _Shrinker1D* > eShri1D;
9403 for ( size_t iS = 0; iS < subEOS.size(); ++iS )
9405 _EdgesOnShape& eos = * subEOS[ iS ];
9406 if ( eos.SWOLType() == TopAbs_EDGE )
9408 SMESH_subMesh* edgeSM = _mesh->GetSubMesh( eos._sWOL );
9409 _Shrinker1D& srinker = e2shrMap[ edgeSM->GetId() ];
9410 eShri1D.insert( & srinker );
9411 srinker.AddEdge( eos._edges[0], eos, helper );
9412 VISCOUS_3D::ToClearSubWithMain( edgeSM, data._solid );
9413 // restore params of nodes on EGDE if the EDGE has been already
9414 // srinked while srinking other FACE
9415 srinker.RestoreParams();
9417 for ( size_t i = 0; i < eos._edges.size(); ++i )
9419 _LayerEdge& edge = * eos._edges[i];
9420 _Simplex::GetSimplices( /*tgtNode=*/edge._nodes.back(), edge._simplices, ignoreShapes );
9425 bool toFixTria = false; // to improve quality of trias by diagonal swap
9426 if ( isConcaveFace )
9428 const bool hasTria = _mesh->NbTriangles(), hasQuad = _mesh->NbQuadrangles();
9429 if ( hasTria != hasQuad ) {
9430 toFixTria = hasTria;
9433 set<int> nbNodesSet;
9434 SMDS_ElemIteratorPtr fIt = smDS->GetElements();
9435 while ( fIt->more() && nbNodesSet.size() < 2 )
9436 nbNodesSet.insert( fIt->next()->NbCornerNodes() );
9437 toFixTria = ( *nbNodesSet.begin() == 3 );
9441 // ==================
9442 // Perform shrinking
9443 // ==================
9445 bool shrinked = true;
9446 int badNb, shriStep=0, smooStep=0;
9447 _SmoothNode::SmoothType smoothType
9448 = isConcaveFace ? _SmoothNode::ANGULAR : _SmoothNode::LAPLACIAN;
9449 SMESH_Comment errMsg;
9453 // Move boundary nodes (actually just set new UV)
9454 // -----------------------------------------------
9455 dumpFunction(SMESH_Comment("moveBoundaryOnF")<<f2sd->first<<"_st"<<shriStep ); // debug
9457 for ( size_t iS = 0; iS < subEOS.size(); ++iS )
9459 _EdgesOnShape& eos = * subEOS[ iS ];
9460 for ( size_t i = 0; i < eos._edges.size(); ++i )
9462 shrinked |= eos._edges[i]->SetNewLength2d( surface, F, eos, helper );
9467 // Move nodes on EDGE's
9468 // (XYZ is set as soon as a needed length reached in SetNewLength2d())
9469 set< _Shrinker1D* >::iterator shr = eShri1D.begin();
9470 for ( ; shr != eShri1D.end(); ++shr )
9471 (*shr)->Compute( /*set3D=*/false, helper );
9474 // -----------------
9475 int nbNoImpSteps = 0;
9478 while (( nbNoImpSteps < 5 && badNb > 0) && moved)
9480 dumpFunction(SMESH_Comment("shrinkFace")<<f2sd->first<<"_st"<<++smooStep); // debug
9482 int oldBadNb = badNb;
9485 // '% 5' minimizes NB FUNCTIONS on viscous_layers_00/B2 case
9486 _SmoothNode::SmoothType smooTy = ( smooStep % 5 ) ? smoothType : _SmoothNode::LAPLACIAN;
9487 for ( size_t i = 0; i < nodesToSmooth.size(); ++i )
9489 moved |= nodesToSmooth[i].Smooth( badNb, surface, helper, refSign,
9490 smooTy, /*set3D=*/isConcaveFace);
9492 if ( badNb < oldBadNb )
9502 errMsg << "Can't shrink 2D mesh on face " << f2sd->first;
9503 if ( shriStep > 200 )
9504 errMsg << "Infinite loop at shrinking 2D mesh on face " << f2sd->first;
9505 if ( !errMsg.empty() )
9508 // Fix narrow triangles by swapping diagonals
9509 // ---------------------------------------
9512 set<const SMDS_MeshNode*> usedNodes;
9513 fixBadFaces( F, helper, /*is2D=*/true, shriStep, & usedNodes); // swap diagonals
9515 // update working data
9516 set<const SMDS_MeshNode*>::iterator n;
9517 for ( size_t i = 0; i < nodesToSmooth.size() && !usedNodes.empty(); ++i )
9519 n = usedNodes.find( nodesToSmooth[ i ]._node );
9520 if ( n != usedNodes.end())
9522 _Simplex::GetSimplices( nodesToSmooth[ i ]._node,
9523 nodesToSmooth[ i ]._simplices,
9525 /*sortSimplices=*/ smoothType == _SmoothNode::ANGULAR );
9526 usedNodes.erase( n );
9529 for ( size_t i = 0; i < lEdges.size() && !usedNodes.empty(); ++i )
9531 n = usedNodes.find( /*tgtNode=*/ lEdges[i]->_nodes.back() );
9532 if ( n != usedNodes.end())
9534 _Simplex::GetSimplices( lEdges[i]->_nodes.back(),
9535 lEdges[i]->_simplices,
9537 usedNodes.erase( n );
9541 // TODO: check effect of this additional smooth
9542 // additional laplacian smooth to increase allowed shrink step
9543 // for ( int st = 1; st; --st )
9545 // dumpFunction(SMESH_Comment("shrinkFace")<<f2sd->first<<"_st"<<++smooStep); // debug
9546 // for ( size_t i = 0; i < nodesToSmooth.size(); ++i )
9548 // nodesToSmooth[i].Smooth( badNb,surface,helper,refSign,
9549 // _SmoothNode::LAPLACIAN,/*set3D=*/false);
9553 } // while ( shrinked )
9555 if ( !errMsg.empty() ) // Try to re-compute the shrink FACE
9558 SMESHDS_SubMesh* psm = data._proxyMesh->getFaceSubM( F );
9560 vector< const SMDS_MeshElement* > facesToRm;
9563 facesToRm.reserve( psm->NbElements() );
9564 for ( SMDS_ElemIteratorPtr ite = psm->GetElements(); ite->more(); )
9565 facesToRm.push_back( ite->next() );
9567 for ( size_t i = 0 ; i < _sdVec.size(); ++i )
9568 if (( psm = _sdVec[i]._proxyMesh->getFaceSubM( F )))
9571 for ( size_t i = 0; i < facesToRm.size(); ++i )
9572 getMeshDS()->RemoveFreeElement( facesToRm[i], smDS, /*fromGroups=*/false );
9576 TIDSortedNodeSet nodesToKeep; // nodes of _LayerEdge to keep
9577 for ( size_t iS = 0; iS < subEOS.size(); ++iS ) {
9578 for ( size_t i = 0; i < subEOS[iS]->_edges.size(); ++i )
9579 nodesToKeep.insert( ++( subEOS[iS]->_edges[i]->_nodes.begin() ),
9580 subEOS[iS]->_edges[i]->_nodes.end() );
9582 SMDS_NodeIteratorPtr itn = smDS->GetNodes();
9583 while ( itn->more() ) {
9584 const SMDS_MeshNode* n = itn->next();
9585 if ( !nodesToKeep.count( n ))
9586 getMeshDS()->RemoveFreeNode( n, smDS, /*fromGroups=*/false );
9589 // restore position and UV of target nodes
9591 for ( size_t iS = 0; iS < subEOS.size(); ++iS )
9592 for ( size_t i = 0; i < subEOS[iS]->_edges.size(); ++i )
9594 _LayerEdge* edge = subEOS[iS]->_edges[i];
9595 SMDS_MeshNode* tgtNode = const_cast< SMDS_MeshNode*& >( edge->_nodes.back() );
9596 if ( edge->_pos.empty() ) continue;
9597 if ( subEOS[iS]->SWOLType() == TopAbs_FACE )
9599 SMDS_FacePosition* pos = static_cast<SMDS_FacePosition*>( tgtNode->GetPosition() );
9600 pos->SetUParameter( edge->_pos[0].X() );
9601 pos->SetVParameter( edge->_pos[0].Y() );
9602 p = surface->Value( edge->_pos[0].X(), edge->_pos[0].Y() );
9606 SMDS_EdgePosition* pos = static_cast<SMDS_EdgePosition*>( tgtNode->GetPosition() );
9607 pos->SetUParameter( edge->_pos[0].Coord( U_TGT ));
9608 p = BRepAdaptor_Curve( TopoDS::Edge( subEOS[iS]->_sWOL )).Value( pos->GetUParameter() );
9610 tgtNode->setXYZ( p.X(), p.Y(), p.Z() );
9611 dumpMove( tgtNode );
9613 // shrink EDGE sub-meshes and set proxy sub-meshes
9614 UVPtStructVec uvPtVec;
9615 set< _Shrinker1D* >::iterator shrIt = eShri1D.begin();
9616 for ( shrIt = eShri1D.begin(); shrIt != eShri1D.end(); ++shrIt )
9618 _Shrinker1D* shr = (*shrIt);
9619 shr->Compute( /*set3D=*/true, helper );
9621 // set proxy mesh of EDGEs w/o layers
9622 map< double, const SMDS_MeshNode* > nodes;
9623 SMESH_Algo::GetSortedNodesOnEdge( getMeshDS(), shr->GeomEdge(),/*skipMedium=*/true, nodes);
9624 // remove refinement nodes
9625 const SMDS_MeshNode* sn0 = shr->SrcNode(0), *sn1 = shr->SrcNode(1);
9626 const SMDS_MeshNode* tn0 = shr->TgtNode(0), *tn1 = shr->TgtNode(1);
9627 map< double, const SMDS_MeshNode* >::iterator u2n = nodes.begin();
9628 if ( u2n->second == sn0 || u2n->second == sn1 )
9630 while ( u2n->second != tn0 && u2n->second != tn1 )
9632 nodes.erase( nodes.begin(), u2n );
9634 u2n = --nodes.end();
9635 if ( u2n->second == sn0 || u2n->second == sn1 )
9637 while ( u2n->second != tn0 && u2n->second != tn1 )
9639 nodes.erase( ++u2n, nodes.end() );
9641 // set proxy sub-mesh
9642 uvPtVec.resize( nodes.size() );
9643 u2n = nodes.begin();
9644 BRepAdaptor_Curve2d curve( shr->GeomEdge(), F );
9645 for ( size_t i = 0; i < nodes.size(); ++i, ++u2n )
9647 uvPtVec[ i ].node = u2n->second;
9648 uvPtVec[ i ].param = u2n->first;
9649 uvPtVec[ i ].SetUV( curve.Value( u2n->first ).XY() );
9651 StdMeshers_FaceSide fSide( uvPtVec, F, shr->GeomEdge(), _mesh );
9652 StdMeshers_ViscousLayers2D::SetProxyMeshOfEdge( fSide );
9655 // set proxy mesh of EDGEs with layers
9656 vector< _LayerEdge* > edges;
9657 for ( size_t iS = 0; iS < subEOS.size(); ++iS )
9659 _EdgesOnShape& eos = * subEOS[ iS ];
9660 if ( eos.ShapeType() != TopAbs_EDGE ) continue;
9662 const TopoDS_Edge& E = TopoDS::Edge( eos._shape );
9663 data.SortOnEdge( E, eos._edges );
9666 if ( _EdgesOnShape* eov = data.GetShapeEdges( helper.IthVertex( 0, E, /*CumOri=*/false )))
9667 if ( !eov->_edges.empty() )
9668 edges.push_back( eov->_edges[0] ); // on 1st VERTEX
9670 edges.insert( edges.end(), eos._edges.begin(), eos._edges.end() );
9672 if ( _EdgesOnShape* eov = data.GetShapeEdges( helper.IthVertex( 1, E, /*CumOri=*/false )))
9673 if ( !eov->_edges.empty() )
9674 edges.push_back( eov->_edges[0] ); // on last VERTEX
9676 uvPtVec.resize( edges.size() );
9677 for ( size_t i = 0; i < edges.size(); ++i )
9679 uvPtVec[ i ].node = edges[i]->_nodes.back();
9680 uvPtVec[ i ].param = helper.GetNodeU( E, edges[i]->_nodes[0] );
9681 uvPtVec[ i ].SetUV( helper.GetNodeUV( F, edges[i]->_nodes.back() ));
9683 BRep_Tool::Range( E, uvPtVec[0].param, uvPtVec.back().param );
9684 StdMeshers_FaceSide fSide( uvPtVec, F, E, _mesh );
9685 StdMeshers_ViscousLayers2D::SetProxyMeshOfEdge( fSide );
9687 // temporary clear the FACE sub-mesh from faces made by refine()
9688 vector< const SMDS_MeshElement* > elems;
9689 elems.reserve( smDS->NbElements() + smDS->NbNodes() );
9690 for ( SMDS_ElemIteratorPtr ite = smDS->GetElements(); ite->more(); )
9691 elems.push_back( ite->next() );
9692 for ( SMDS_NodeIteratorPtr ite = smDS->GetNodes(); ite->more(); )
9693 elems.push_back( ite->next() );
9696 // compute the mesh on the FACE
9697 sm->ComputeStateEngine( SMESH_subMesh::CHECK_COMPUTE_STATE );
9698 sm->ComputeStateEngine( SMESH_subMesh::COMPUTE_SUBMESH );
9700 // re-fill proxy sub-meshes of the FACE
9701 for ( size_t i = 0 ; i < _sdVec.size(); ++i )
9702 if (( psm = _sdVec[i]._proxyMesh->getFaceSubM( F )))
9703 for ( SMDS_ElemIteratorPtr ite = smDS->GetElements(); ite->more(); )
9704 psm->AddElement( ite->next() );
9707 for ( size_t i = 0; i < elems.size(); ++i )
9708 smDS->AddElement( elems[i] );
9710 if ( sm->GetComputeState() != SMESH_subMesh::COMPUTE_OK )
9711 return error( errMsg );
9713 } // end of re-meshing in case of failed smoothing
9716 // No wrongly shaped faces remain; final smooth. Set node XYZ.
9717 bool isStructuredFixed = false;
9718 if ( SMESH_2D_Algo* algo = dynamic_cast<SMESH_2D_Algo*>( sm->GetAlgo() ))
9719 isStructuredFixed = algo->FixInternalNodes( *data._proxyMesh, F );
9720 if ( !isStructuredFixed )
9722 if ( isConcaveFace ) // fix narrow faces by swapping diagonals
9723 fixBadFaces( F, helper, /*is2D=*/false, ++shriStep );
9725 for ( int st = 3; st; --st )
9728 case 1: smoothType = _SmoothNode::LAPLACIAN; break;
9729 case 2: smoothType = _SmoothNode::LAPLACIAN; break;
9730 case 3: smoothType = _SmoothNode::ANGULAR; break;
9732 dumpFunction(SMESH_Comment("shrinkFace")<<f2sd->first<<"_st"<<++smooStep); // debug
9733 for ( size_t i = 0; i < nodesToSmooth.size(); ++i )
9735 nodesToSmooth[i].Smooth( badNb,surface,helper,refSign,
9736 smoothType,/*set3D=*/st==1 );
9741 if ( !getMeshDS()->IsEmbeddedMode() )
9742 // Log node movement
9743 for ( size_t i = 0; i < nodesToSmooth.size(); ++i )
9745 SMESH_TNodeXYZ p ( nodesToSmooth[i]._node );
9746 getMeshDS()->MoveNode( nodesToSmooth[i]._node, p.X(), p.Y(), p.Z() );
9750 // Set an event listener to clear FACE sub-mesh together with SOLID sub-mesh
9751 VISCOUS_3D::ToClearSubWithMain( sm, data._solid );
9753 } // loop on FACES to srink mesh on
9756 // Replace source nodes by target nodes in shrinked mesh edges
9758 map< int, _Shrinker1D >::iterator e2shr = e2shrMap.begin();
9759 for ( ; e2shr != e2shrMap.end(); ++e2shr )
9760 e2shr->second.SwapSrcTgtNodes( getMeshDS() );
9765 //================================================================================
9767 * \brief Computes 2d shrink direction and finds nodes limiting shrinking
9769 //================================================================================
9771 bool _ViscousBuilder::prepareEdgeToShrink( _LayerEdge& edge,
9773 SMESH_MesherHelper& helper,
9774 const SMESHDS_SubMesh* faceSubMesh)
9776 const SMDS_MeshNode* srcNode = edge._nodes[0];
9777 const SMDS_MeshNode* tgtNode = edge._nodes.back();
9779 if ( eos.SWOLType() == TopAbs_FACE )
9781 if ( tgtNode->GetPosition()->GetDim() != 2 ) // not inflated edge
9784 return srcNode == tgtNode;
9786 gp_XY srcUV ( edge._pos[0].X(), edge._pos[0].Y() ); //helper.GetNodeUV( F, srcNode );
9787 gp_XY tgtUV = edge.LastUV( TopoDS::Face( eos._sWOL ), eos ); //helper.GetNodeUV( F, tgtNode );
9788 gp_Vec2d uvDir( srcUV, tgtUV );
9789 double uvLen = uvDir.Magnitude();
9791 edge._normal.SetCoord( uvDir.X(),uvDir.Y(), 0 );
9794 edge._pos.resize(1);
9795 edge._pos[0].SetCoord( tgtUV.X(), tgtUV.Y(), 0 );
9797 // set UV of source node to target node
9798 SMDS_FacePosition* pos = static_cast<SMDS_FacePosition*>( tgtNode->GetPosition() );
9799 pos->SetUParameter( srcUV.X() );
9800 pos->SetVParameter( srcUV.Y() );
9802 else // _sWOL is TopAbs_EDGE
9804 if ( tgtNode->GetPosition()->GetDim() != 1 ) // not inflated edge
9807 return srcNode == tgtNode;
9809 const TopoDS_Edge& E = TopoDS::Edge( eos._sWOL );
9810 SMESHDS_SubMesh* edgeSM = getMeshDS()->MeshElements( E );
9811 if ( !edgeSM || edgeSM->NbElements() == 0 )
9812 return error(SMESH_Comment("Not meshed EDGE ") << getMeshDS()->ShapeToIndex( E ));
9814 const SMDS_MeshNode* n2 = 0;
9815 SMDS_ElemIteratorPtr eIt = srcNode->GetInverseElementIterator(SMDSAbs_Edge);
9816 while ( eIt->more() && !n2 )
9818 const SMDS_MeshElement* e = eIt->next();
9819 if ( !edgeSM->Contains(e)) continue;
9820 n2 = e->GetNode( 0 );
9821 if ( n2 == srcNode ) n2 = e->GetNode( 1 );
9824 return error(SMESH_Comment("Wrongly meshed EDGE ") << getMeshDS()->ShapeToIndex( E ));
9826 double uSrc = helper.GetNodeU( E, srcNode, n2 );
9827 double uTgt = helper.GetNodeU( E, tgtNode, srcNode );
9828 double u2 = helper.GetNodeU( E, n2, srcNode );
9832 if ( fabs( uSrc-uTgt ) < 0.99 * fabs( uSrc-u2 ))
9834 // tgtNode is located so that it does not make faces with wrong orientation
9837 edge._pos.resize(1);
9838 edge._pos[0].SetCoord( U_TGT, uTgt );
9839 edge._pos[0].SetCoord( U_SRC, uSrc );
9840 edge._pos[0].SetCoord( LEN_TGT, fabs( uSrc-uTgt ));
9842 edge._simplices.resize( 1 );
9843 edge._simplices[0]._nPrev = n2;
9845 // set U of source node to the target node
9846 SMDS_EdgePosition* pos = static_cast<SMDS_EdgePosition*>( tgtNode->GetPosition() );
9847 pos->SetUParameter( uSrc );
9852 //================================================================================
9854 * \brief Restore position of a sole node of a _LayerEdge based on _noShrinkShapes
9856 //================================================================================
9858 void _ViscousBuilder::restoreNoShrink( _LayerEdge& edge ) const
9860 if ( edge._nodes.size() == 1 )
9865 const SMDS_MeshNode* srcNode = edge._nodes[0];
9866 TopoDS_Shape S = SMESH_MesherHelper::GetSubShapeByNode( srcNode, getMeshDS() );
9867 if ( S.IsNull() ) return;
9871 switch ( S.ShapeType() )
9876 TopLoc_Location loc;
9877 Handle(Geom_Curve) curve = BRep_Tool::Curve( TopoDS::Edge( S ), loc, f, l );
9878 if ( curve.IsNull() ) return;
9879 SMDS_EdgePosition* ePos = static_cast<SMDS_EdgePosition*>( srcNode->GetPosition() );
9880 p = curve->Value( ePos->GetUParameter() );
9885 p = BRep_Tool::Pnt( TopoDS::Vertex( S ));
9890 getMeshDS()->MoveNode( srcNode, p.X(), p.Y(), p.Z() );
9891 dumpMove( srcNode );
9895 //================================================================================
9897 * \brief Try to fix triangles with high aspect ratio by swaping diagonals
9899 //================================================================================
9901 void _ViscousBuilder::fixBadFaces(const TopoDS_Face& F,
9902 SMESH_MesherHelper& helper,
9905 set<const SMDS_MeshNode*> * involvedNodes)
9907 SMESH::Controls::AspectRatio qualifier;
9908 SMESH::Controls::TSequenceOfXYZ points(3), points1(3), points2(3);
9909 const double maxAspectRatio = is2D ? 4. : 2;
9910 _NodeCoordHelper xyz( F, helper, is2D );
9912 // find bad triangles
9914 vector< const SMDS_MeshElement* > badTrias;
9915 vector< double > badAspects;
9916 SMESHDS_SubMesh* sm = helper.GetMeshDS()->MeshElements( F );
9917 SMDS_ElemIteratorPtr fIt = sm->GetElements();
9918 while ( fIt->more() )
9920 const SMDS_MeshElement * f = fIt->next();
9921 if ( f->NbCornerNodes() != 3 ) continue;
9922 for ( int iP = 0; iP < 3; ++iP ) points(iP+1) = xyz( f->GetNode(iP));
9923 double aspect = qualifier.GetValue( points );
9924 if ( aspect > maxAspectRatio )
9926 badTrias.push_back( f );
9927 badAspects.push_back( aspect );
9932 dumpFunction(SMESH_Comment("beforeSwapDiagonals_F")<<helper.GetSubShapeID());
9933 SMDS_ElemIteratorPtr fIt = sm->GetElements();
9934 while ( fIt->more() )
9936 const SMDS_MeshElement * f = fIt->next();
9937 if ( f->NbCornerNodes() == 3 )
9938 dumpChangeNodes( f );
9942 if ( badTrias.empty() )
9945 // find couples of faces to swap diagonal
9947 typedef pair < const SMDS_MeshElement* , const SMDS_MeshElement* > T2Trias;
9948 vector< T2Trias > triaCouples;
9950 TIDSortedElemSet involvedFaces, emptySet;
9951 for ( size_t iTia = 0; iTia < badTrias.size(); ++iTia )
9954 double aspRatio [3];
9957 if ( !involvedFaces.insert( badTrias[iTia] ).second )
9959 for ( int iP = 0; iP < 3; ++iP )
9960 points(iP+1) = xyz( badTrias[iTia]->GetNode(iP));
9962 // find triangles adjacent to badTrias[iTia] with better aspect ratio after diag-swaping
9963 int bestCouple = -1;
9964 for ( int iSide = 0; iSide < 3; ++iSide )
9966 const SMDS_MeshNode* n1 = badTrias[iTia]->GetNode( iSide );
9967 const SMDS_MeshNode* n2 = badTrias[iTia]->GetNode(( iSide+1 ) % 3 );
9968 trias [iSide].first = badTrias[iTia];
9969 trias [iSide].second = SMESH_MeshAlgos::FindFaceInSet( n1, n2, emptySet, involvedFaces,
9971 if (( ! trias[iSide].second ) ||
9972 ( trias[iSide].second->NbCornerNodes() != 3 ) ||
9973 ( ! sm->Contains( trias[iSide].second )))
9976 // aspect ratio of an adjacent tria
9977 for ( int iP = 0; iP < 3; ++iP )
9978 points2(iP+1) = xyz( trias[iSide].second->GetNode(iP));
9979 double aspectInit = qualifier.GetValue( points2 );
9981 // arrange nodes as after diag-swaping
9982 if ( helper.WrapIndex( i1+1, 3 ) == i2 )
9983 i3 = helper.WrapIndex( i1-1, 3 );
9985 i3 = helper.WrapIndex( i1+1, 3 );
9987 points1( 1+ iSide ) = points2( 1+ i3 );
9988 points2( 1+ i2 ) = points1( 1+ ( iSide+2 ) % 3 );
9990 // aspect ratio after diag-swaping
9991 aspRatio[ iSide ] = qualifier.GetValue( points1 ) + qualifier.GetValue( points2 );
9992 if ( aspRatio[ iSide ] > aspectInit + badAspects[ iTia ] )
9995 // prevent inversion of a triangle
9996 gp_Vec norm1 = gp_Vec( points1(1), points1(3) ) ^ gp_Vec( points1(1), points1(2) );
9997 gp_Vec norm2 = gp_Vec( points2(1), points2(3) ) ^ gp_Vec( points2(1), points2(2) );
9998 if ( norm1 * norm2 < 0. && norm1.Angle( norm2 ) > 70./180.*M_PI )
10001 if ( bestCouple < 0 || aspRatio[ bestCouple ] > aspRatio[ iSide ] )
10002 bestCouple = iSide;
10005 if ( bestCouple >= 0 )
10007 triaCouples.push_back( trias[bestCouple] );
10008 involvedFaces.insert ( trias[bestCouple].second );
10012 involvedFaces.erase( badTrias[iTia] );
10015 if ( triaCouples.empty() )
10020 SMESH_MeshEditor editor( helper.GetMesh() );
10021 dumpFunction(SMESH_Comment("beforeSwapDiagonals_F")<<helper.GetSubShapeID()<<"_"<<step);
10022 for ( size_t i = 0; i < triaCouples.size(); ++i )
10024 dumpChangeNodes( triaCouples[i].first );
10025 dumpChangeNodes( triaCouples[i].second );
10026 editor.InverseDiag( triaCouples[i].first, triaCouples[i].second );
10029 if ( involvedNodes )
10030 for ( size_t i = 0; i < triaCouples.size(); ++i )
10032 involvedNodes->insert( triaCouples[i].first->begin_nodes(),
10033 triaCouples[i].first->end_nodes() );
10034 involvedNodes->insert( triaCouples[i].second->begin_nodes(),
10035 triaCouples[i].second->end_nodes() );
10038 // just for debug dump resulting triangles
10039 dumpFunction(SMESH_Comment("swapDiagonals_F")<<helper.GetSubShapeID()<<"_"<<step);
10040 for ( size_t i = 0; i < triaCouples.size(); ++i )
10042 dumpChangeNodes( triaCouples[i].first );
10043 dumpChangeNodes( triaCouples[i].second );
10047 //================================================================================
10049 * \brief Move target node to it's final position on the FACE during shrinking
10051 //================================================================================
10053 bool _LayerEdge::SetNewLength2d( Handle(Geom_Surface)& surface,
10054 const TopoDS_Face& F,
10055 _EdgesOnShape& eos,
10056 SMESH_MesherHelper& helper )
10058 if ( _pos.empty() )
10059 return false; // already at the target position
10061 SMDS_MeshNode* tgtNode = const_cast< SMDS_MeshNode*& >( _nodes.back() );
10063 if ( eos.SWOLType() == TopAbs_FACE )
10065 gp_XY curUV = helper.GetNodeUV( F, tgtNode );
10066 gp_Pnt2d tgtUV( _pos[0].X(), _pos[0].Y() );
10067 gp_Vec2d uvDir( _normal.X(), _normal.Y() );
10068 const double uvLen = tgtUV.Distance( curUV );
10069 const double kSafe = Max( 0.5, 1. - 0.1 * _simplices.size() );
10071 // Select shrinking step such that not to make faces with wrong orientation.
10072 double stepSize = 1e100;
10073 for ( size_t i = 0; i < _simplices.size(); ++i )
10075 // find intersection of 2 lines: curUV-tgtUV and that connecting simplex nodes
10076 gp_XY uvN1 = helper.GetNodeUV( F, _simplices[i]._nPrev );
10077 gp_XY uvN2 = helper.GetNodeUV( F, _simplices[i]._nNext );
10078 gp_XY dirN = uvN2 - uvN1;
10079 double det = uvDir.Crossed( dirN );
10080 if ( Abs( det ) < std::numeric_limits<double>::min() ) continue;
10081 gp_XY dirN2Cur = curUV - uvN1;
10082 double step = dirN.Crossed( dirN2Cur ) / det;
10084 stepSize = Min( step, stepSize );
10087 if ( uvLen <= stepSize )
10092 else if ( stepSize > 0 )
10094 newUV = curUV + uvDir.XY() * stepSize * kSafe;
10100 SMDS_FacePosition* pos = static_cast<SMDS_FacePosition*>( tgtNode->GetPosition() );
10101 pos->SetUParameter( newUV.X() );
10102 pos->SetVParameter( newUV.Y() );
10105 gp_Pnt p = surface->Value( newUV.X(), newUV.Y() );
10106 tgtNode->setXYZ( p.X(), p.Y(), p.Z() );
10107 dumpMove( tgtNode );
10110 else // _sWOL is TopAbs_EDGE
10112 const TopoDS_Edge& E = TopoDS::Edge( eos._sWOL );
10113 const SMDS_MeshNode* n2 = _simplices[0]._nPrev;
10114 SMDS_EdgePosition* tgtPos = static_cast<SMDS_EdgePosition*>( tgtNode->GetPosition() );
10116 const double u2 = helper.GetNodeU( E, n2, tgtNode );
10117 const double uSrc = _pos[0].Coord( U_SRC );
10118 const double lenTgt = _pos[0].Coord( LEN_TGT );
10120 double newU = _pos[0].Coord( U_TGT );
10121 if ( lenTgt < 0.99 * fabs( uSrc-u2 )) // n2 got out of src-tgt range
10127 newU = 0.1 * tgtPos->GetUParameter() + 0.9 * u2;
10129 tgtPos->SetUParameter( newU );
10131 gp_XY newUV = helper.GetNodeUV( F, tgtNode, _nodes[0]);
10132 gp_Pnt p = surface->Value( newUV.X(), newUV.Y() );
10133 tgtNode->setXYZ( p.X(), p.Y(), p.Z() );
10134 dumpMove( tgtNode );
10141 //================================================================================
10143 * \brief Perform smooth on the FACE
10144 * \retval bool - true if the node has been moved
10146 //================================================================================
10148 bool _SmoothNode::Smooth(int& badNb,
10149 Handle(Geom_Surface)& surface,
10150 SMESH_MesherHelper& helper,
10151 const double refSign,
10155 const TopoDS_Face& face = TopoDS::Face( helper.GetSubShape() );
10157 // get uv of surrounding nodes
10158 vector<gp_XY> uv( _simplices.size() );
10159 for ( size_t i = 0; i < _simplices.size(); ++i )
10160 uv[i] = helper.GetNodeUV( face, _simplices[i]._nPrev, _node );
10162 // compute new UV for the node
10163 gp_XY newPos (0,0);
10164 if ( how == TFI && _simplices.size() == 4 )
10167 for ( size_t i = 0; i < _simplices.size(); ++i )
10168 if ( _simplices[i]._nOpp )
10169 corners[i] = helper.GetNodeUV( face, _simplices[i]._nOpp, _node );
10171 throw SALOME_Exception(LOCALIZED("TFI smoothing: _Simplex::_nOpp not set!"));
10173 newPos = helper.calcTFI ( 0.5, 0.5,
10174 corners[0], corners[1], corners[2], corners[3],
10175 uv[1], uv[2], uv[3], uv[0] );
10177 else if ( how == ANGULAR )
10179 newPos = computeAngularPos( uv, helper.GetNodeUV( face, _node ), refSign );
10181 else if ( how == CENTROIDAL && _simplices.size() > 3 )
10183 // average centers of diagonals wieghted with their reciprocal lengths
10184 if ( _simplices.size() == 4 )
10186 double w1 = 1. / ( uv[2]-uv[0] ).SquareModulus();
10187 double w2 = 1. / ( uv[3]-uv[1] ).SquareModulus();
10188 newPos = ( w1 * ( uv[2]+uv[0] ) + w2 * ( uv[3]+uv[1] )) / ( w1+w2 ) / 2;
10192 double sumWeight = 0;
10193 int nb = _simplices.size() == 4 ? 2 : _simplices.size();
10194 for ( int i = 0; i < nb; ++i )
10197 int iTo = i + _simplices.size() - 1;
10198 for ( int j = iFrom; j < iTo; ++j )
10200 int i2 = SMESH_MesherHelper::WrapIndex( j, _simplices.size() );
10201 double w = 1. / ( uv[i]-uv[i2] ).SquareModulus();
10203 newPos += w * ( uv[i]+uv[i2] );
10206 newPos /= 2 * sumWeight; // 2 is to get a middle between uv's
10211 // Laplacian smooth
10212 for ( size_t i = 0; i < _simplices.size(); ++i )
10214 newPos /= _simplices.size();
10217 // count quality metrics (orientation) of triangles around the node
10218 int nbOkBefore = 0;
10219 gp_XY tgtUV = helper.GetNodeUV( face, _node );
10220 for ( size_t i = 0; i < _simplices.size(); ++i )
10221 nbOkBefore += _simplices[i].IsForward( tgtUV, _node, face, helper, refSign );
10224 for ( size_t i = 0; i < _simplices.size(); ++i )
10225 nbOkAfter += _simplices[i].IsForward( newPos, _node, face, helper, refSign );
10227 if ( nbOkAfter < nbOkBefore )
10229 badNb += _simplices.size() - nbOkBefore;
10233 SMDS_FacePosition* pos = static_cast<SMDS_FacePosition*>( _node->GetPosition() );
10234 pos->SetUParameter( newPos.X() );
10235 pos->SetVParameter( newPos.Y() );
10242 gp_Pnt p = surface->Value( newPos.X(), newPos.Y() );
10243 const_cast< SMDS_MeshNode* >( _node )->setXYZ( p.X(), p.Y(), p.Z() );
10247 badNb += _simplices.size() - nbOkAfter;
10248 return ( (tgtUV-newPos).SquareModulus() > 1e-10 );
10251 //================================================================================
10253 * \brief Computes new UV using angle based smoothing technic
10255 //================================================================================
10257 gp_XY _SmoothNode::computeAngularPos(vector<gp_XY>& uv,
10258 const gp_XY& uvToFix,
10259 const double refSign)
10261 uv.push_back( uv.front() );
10263 vector< gp_XY > edgeDir ( uv.size() );
10264 vector< double > edgeSize( uv.size() );
10265 for ( size_t i = 1; i < edgeDir.size(); ++i )
10267 edgeDir [i-1] = uv[i] - uv[i-1];
10268 edgeSize[i-1] = edgeDir[i-1].Modulus();
10269 if ( edgeSize[i-1] < numeric_limits<double>::min() )
10270 edgeDir[i-1].SetX( 100 );
10272 edgeDir[i-1] /= edgeSize[i-1] * refSign;
10274 edgeDir.back() = edgeDir.front();
10275 edgeSize.back() = edgeSize.front();
10279 double sumSize = 0;
10280 for ( size_t i = 1; i < edgeDir.size(); ++i )
10282 if ( edgeDir[i-1].X() > 1. ) continue;
10284 while ( edgeDir[i].X() > 1. && ++i < edgeDir.size() );
10285 if ( i == edgeDir.size() ) break;
10287 gp_XY norm1( -edgeDir[i1].Y(), edgeDir[i1].X() );
10288 gp_XY norm2( -edgeDir[i].Y(), edgeDir[i].X() );
10289 gp_XY bisec = norm1 + norm2;
10290 double bisecSize = bisec.Modulus();
10291 if ( bisecSize < numeric_limits<double>::min() )
10293 bisec = -edgeDir[i1] + edgeDir[i];
10294 bisecSize = bisec.Modulus();
10296 bisec /= bisecSize;
10298 gp_XY dirToN = uvToFix - p;
10299 double distToN = dirToN.Modulus();
10300 if ( bisec * dirToN < 0 )
10301 distToN = -distToN;
10303 newPos += ( p + bisec * distToN ) * ( edgeSize[i1] + edgeSize[i] );
10305 sumSize += edgeSize[i1] + edgeSize[i];
10307 newPos /= /*nbEdges * */sumSize;
10311 //================================================================================
10313 * \brief Delete _SolidData
10315 //================================================================================
10317 _SolidData::~_SolidData()
10319 TNode2Edge::iterator n2e = _n2eMap.begin();
10320 for ( ; n2e != _n2eMap.end(); ++n2e )
10322 _LayerEdge* & e = n2e->second;
10325 delete e->_curvature;
10326 if ( e->_2neibors )
10327 delete e->_2neibors->_plnNorm;
10328 delete e->_2neibors;
10339 //================================================================================
10341 * \brief Keep a _LayerEdge inflated along the EDGE
10343 //================================================================================
10345 void _Shrinker1D::AddEdge( const _LayerEdge* e,
10346 _EdgesOnShape& eos,
10347 SMESH_MesherHelper& helper )
10350 if ( _nodes.empty() )
10352 _edges[0] = _edges[1] = 0;
10355 // check _LayerEdge
10356 if ( e == _edges[0] || e == _edges[1] )
10358 if ( eos.SWOLType() != TopAbs_EDGE )
10359 throw SALOME_Exception(LOCALIZED("Wrong _LayerEdge is added"));
10360 if ( _edges[0] && !_geomEdge.IsSame( eos._sWOL ))
10361 throw SALOME_Exception(LOCALIZED("Wrong _LayerEdge is added"));
10363 // store _LayerEdge
10364 _geomEdge = TopoDS::Edge( eos._sWOL );
10366 BRep_Tool::Range( _geomEdge, f,l );
10367 double u = helper.GetNodeU( _geomEdge, e->_nodes[0], e->_nodes.back());
10368 _edges[ u < 0.5*(f+l) ? 0 : 1 ] = e;
10372 const SMDS_MeshNode* tgtNode0 = TgtNode( 0 );
10373 const SMDS_MeshNode* tgtNode1 = TgtNode( 1 );
10375 if ( _nodes.empty() )
10377 SMESHDS_SubMesh * eSubMesh = helper.GetMeshDS()->MeshElements( _geomEdge );
10378 if ( !eSubMesh || eSubMesh->NbNodes() < 1 )
10380 TopLoc_Location loc;
10381 Handle(Geom_Curve) C = BRep_Tool::Curve( _geomEdge, loc, f,l );
10382 GeomAdaptor_Curve aCurve(C, f,l);
10383 const double totLen = GCPnts_AbscissaPoint::Length(aCurve, f, l);
10385 int nbExpectNodes = eSubMesh->NbNodes();
10386 _initU .reserve( nbExpectNodes );
10387 _normPar.reserve( nbExpectNodes );
10388 _nodes .reserve( nbExpectNodes );
10389 SMDS_NodeIteratorPtr nIt = eSubMesh->GetNodes();
10390 while ( nIt->more() )
10392 const SMDS_MeshNode* node = nIt->next();
10393 if ( node->NbInverseElements(SMDSAbs_Edge) == 0 ||
10394 node == tgtNode0 || node == tgtNode1 )
10395 continue; // refinement nodes
10396 _nodes.push_back( node );
10397 _initU.push_back( helper.GetNodeU( _geomEdge, node ));
10398 double len = GCPnts_AbscissaPoint::Length(aCurve, f, _initU.back());
10399 _normPar.push_back( len / totLen );
10404 // remove target node of the _LayerEdge from _nodes
10405 size_t nbFound = 0;
10406 for ( size_t i = 0; i < _nodes.size(); ++i )
10407 if ( !_nodes[i] || _nodes[i] == tgtNode0 || _nodes[i] == tgtNode1 )
10408 _nodes[i] = 0, nbFound++;
10409 if ( nbFound == _nodes.size() )
10414 //================================================================================
10416 * \brief Move nodes on EDGE from ends where _LayerEdge's are inflated
10418 //================================================================================
10420 void _Shrinker1D::Compute(bool set3D, SMESH_MesherHelper& helper)
10422 if ( _done || _nodes.empty())
10424 const _LayerEdge* e = _edges[0];
10425 if ( !e ) e = _edges[1];
10428 _done = (( !_edges[0] || _edges[0]->_pos.empty() ) &&
10429 ( !_edges[1] || _edges[1]->_pos.empty() ));
10432 if ( set3D || _done )
10434 Handle(Geom_Curve) C = BRep_Tool::Curve(_geomEdge, f,l);
10435 GeomAdaptor_Curve aCurve(C, f,l);
10438 f = helper.GetNodeU( _geomEdge, _edges[0]->_nodes.back(), _nodes[0] );
10440 l = helper.GetNodeU( _geomEdge, _edges[1]->_nodes.back(), _nodes.back() );
10441 double totLen = GCPnts_AbscissaPoint::Length( aCurve, f, l );
10443 for ( size_t i = 0; i < _nodes.size(); ++i )
10445 if ( !_nodes[i] ) continue;
10446 double len = totLen * _normPar[i];
10447 GCPnts_AbscissaPoint discret( aCurve, len, f );
10448 if ( !discret.IsDone() )
10449 return throw SALOME_Exception(LOCALIZED("GCPnts_AbscissaPoint failed"));
10450 double u = discret.Parameter();
10451 SMDS_EdgePosition* pos = static_cast<SMDS_EdgePosition*>( _nodes[i]->GetPosition() );
10452 pos->SetUParameter( u );
10453 gp_Pnt p = C->Value( u );
10454 const_cast< SMDS_MeshNode*>( _nodes[i] )->setXYZ( p.X(), p.Y(), p.Z() );
10459 BRep_Tool::Range( _geomEdge, f,l );
10461 f = helper.GetNodeU( _geomEdge, _edges[0]->_nodes.back(), _nodes[0] );
10463 l = helper.GetNodeU( _geomEdge, _edges[1]->_nodes.back(), _nodes.back() );
10465 for ( size_t i = 0; i < _nodes.size(); ++i )
10467 if ( !_nodes[i] ) continue;
10468 double u = f * ( 1-_normPar[i] ) + l * _normPar[i];
10469 SMDS_EdgePosition* pos = static_cast<SMDS_EdgePosition*>( _nodes[i]->GetPosition() );
10470 pos->SetUParameter( u );
10475 //================================================================================
10477 * \brief Restore initial parameters of nodes on EDGE
10479 //================================================================================
10481 void _Shrinker1D::RestoreParams()
10484 for ( size_t i = 0; i < _nodes.size(); ++i )
10486 if ( !_nodes[i] ) continue;
10487 SMDS_EdgePosition* pos = static_cast<SMDS_EdgePosition*>( _nodes[i]->GetPosition() );
10488 pos->SetUParameter( _initU[i] );
10493 //================================================================================
10495 * \brief Replace source nodes by target nodes in shrinked mesh edges
10497 //================================================================================
10499 void _Shrinker1D::SwapSrcTgtNodes( SMESHDS_Mesh* mesh )
10501 const SMDS_MeshNode* nodes[3];
10502 for ( int i = 0; i < 2; ++i )
10504 if ( !_edges[i] ) continue;
10506 SMESHDS_SubMesh * eSubMesh = mesh->MeshElements( _geomEdge );
10507 if ( !eSubMesh ) return;
10508 const SMDS_MeshNode* srcNode = _edges[i]->_nodes[0];
10509 const SMDS_MeshNode* tgtNode = _edges[i]->_nodes.back();
10510 SMDS_ElemIteratorPtr eIt = srcNode->GetInverseElementIterator(SMDSAbs_Edge);
10511 while ( eIt->more() )
10513 const SMDS_MeshElement* e = eIt->next();
10514 if ( !eSubMesh->Contains( e ))
10516 SMDS_ElemIteratorPtr nIt = e->nodesIterator();
10517 for ( int iN = 0; iN < e->NbNodes(); ++iN )
10519 const SMDS_MeshNode* n = static_cast<const SMDS_MeshNode*>( nIt->next() );
10520 nodes[iN] = ( n == srcNode ? tgtNode : n );
10522 mesh->ChangeElementNodes( e, nodes, e->NbNodes() );
10527 //================================================================================
10529 * \brief Creates 2D and 1D elements on boundaries of new prisms
10531 //================================================================================
10533 bool _ViscousBuilder::addBoundaryElements()
10535 SMESH_MesherHelper helper( *_mesh );
10537 vector< const SMDS_MeshNode* > faceNodes;
10539 for ( size_t i = 0; i < _sdVec.size(); ++i )
10541 _SolidData& data = _sdVec[i];
10542 TopTools_IndexedMapOfShape geomEdges;
10543 TopExp::MapShapes( data._solid, TopAbs_EDGE, geomEdges );
10544 for ( int iE = 1; iE <= geomEdges.Extent(); ++iE )
10546 const TopoDS_Edge& E = TopoDS::Edge( geomEdges(iE));
10547 if ( data._noShrinkShapes.count( getMeshDS()->ShapeToIndex( E )))
10550 // Get _LayerEdge's based on E
10552 map< double, const SMDS_MeshNode* > u2nodes;
10553 if ( !SMESH_Algo::GetSortedNodesOnEdge( getMeshDS(), E, /*ignoreMedium=*/false, u2nodes))
10556 vector< _LayerEdge* > ledges; ledges.reserve( u2nodes.size() );
10557 TNode2Edge & n2eMap = data._n2eMap;
10558 map< double, const SMDS_MeshNode* >::iterator u2n = u2nodes.begin();
10560 //check if 2D elements are needed on E
10561 TNode2Edge::iterator n2e = n2eMap.find( u2n->second );
10562 if ( n2e == n2eMap.end() ) continue; // no layers on vertex
10563 ledges.push_back( n2e->second );
10565 if (( n2e = n2eMap.find( u2n->second )) == n2eMap.end() )
10566 continue; // no layers on E
10567 ledges.push_back( n2eMap[ u2n->second ]);
10569 const SMDS_MeshNode* tgtN0 = ledges[0]->_nodes.back();
10570 const SMDS_MeshNode* tgtN1 = ledges[1]->_nodes.back();
10571 int nbSharedPyram = 0;
10572 SMDS_ElemIteratorPtr vIt = tgtN0->GetInverseElementIterator(SMDSAbs_Volume);
10573 while ( vIt->more() )
10575 const SMDS_MeshElement* v = vIt->next();
10576 nbSharedPyram += int( v->GetNodeIndex( tgtN1 ) >= 0 );
10578 if ( nbSharedPyram > 1 )
10579 continue; // not free border of the pyramid
10582 faceNodes.push_back( ledges[0]->_nodes[0] );
10583 faceNodes.push_back( ledges[1]->_nodes[0] );
10584 if ( ledges[0]->_nodes.size() > 1 ) faceNodes.push_back( ledges[0]->_nodes[1] );
10585 if ( ledges[1]->_nodes.size() > 1 ) faceNodes.push_back( ledges[1]->_nodes[1] );
10587 if ( getMeshDS()->FindElement( faceNodes, SMDSAbs_Face, /*noMedium=*/true))
10588 continue; // faces already created
10590 for ( ++u2n; u2n != u2nodes.end(); ++u2n )
10591 ledges.push_back( n2eMap[ u2n->second ]);
10593 // Find out orientation and type of face to create
10595 bool reverse = false, isOnFace;
10597 map< TGeomID, TopoDS_Shape >::iterator e2f =
10598 data._shrinkShape2Shape.find( getMeshDS()->ShapeToIndex( E ));
10600 if (( isOnFace = ( e2f != data._shrinkShape2Shape.end() )))
10602 F = e2f->second.Oriented( TopAbs_FORWARD );
10603 reverse = ( helper.GetSubShapeOri( F, E ) == TopAbs_REVERSED );
10604 if ( helper.GetSubShapeOri( data._solid, F ) == TopAbs_REVERSED )
10605 reverse = !reverse, F.Reverse();
10606 if ( helper.IsReversedSubMesh( TopoDS::Face(F) ))
10607 reverse = !reverse;
10611 // find FACE with layers sharing E
10612 PShapeIteratorPtr fIt = helper.GetAncestors( E, *_mesh, TopAbs_FACE );
10613 while ( fIt->more() && F.IsNull() )
10615 const TopoDS_Shape* pF = fIt->next();
10616 if ( helper.IsSubShape( *pF, data._solid) &&
10617 !data._ignoreFaceIds.count( e2f->first ))
10621 // Find the sub-mesh to add new faces
10622 SMESHDS_SubMesh* sm = 0;
10624 sm = getMeshDS()->MeshElements( F );
10626 sm = data._proxyMesh->getFaceSubM( TopoDS::Face(F), /*create=*/true );
10628 return error("error in addBoundaryElements()", data._index);
10631 const int dj1 = reverse ? 0 : 1;
10632 const int dj2 = reverse ? 1 : 0;
10633 for ( size_t j = 1; j < ledges.size(); ++j )
10635 vector< const SMDS_MeshNode*>& nn1 = ledges[j-dj1]->_nodes;
10636 vector< const SMDS_MeshNode*>& nn2 = ledges[j-dj2]->_nodes;
10637 if ( nn1.size() == nn2.size() )
10640 for ( size_t z = 1; z < nn1.size(); ++z )
10641 sm->AddElement( getMeshDS()->AddFace( nn1[z-1], nn2[z-1], nn2[z], nn1[z] ));
10643 for ( size_t z = 1; z < nn1.size(); ++z )
10644 sm->AddElement( new SMDS_FaceOfNodes( nn1[z-1], nn2[z-1], nn2[z], nn1[z] ));
10646 else if ( nn1.size() == 1 )
10649 for ( size_t z = 1; z < nn2.size(); ++z )
10650 sm->AddElement( getMeshDS()->AddFace( nn1[0], nn2[z-1], nn2[z] ));
10652 for ( size_t z = 1; z < nn2.size(); ++z )
10653 sm->AddElement( new SMDS_FaceOfNodes( nn1[0], nn2[z-1], nn2[z] ));
10658 for ( size_t z = 1; z < nn1.size(); ++z )
10659 sm->AddElement( getMeshDS()->AddFace( nn1[z-1], nn2[0], nn1[z] ));
10661 for ( size_t z = 1; z < nn1.size(); ++z )
10662 sm->AddElement( new SMDS_FaceOfNodes( nn1[z-1], nn2[0], nn2[z] ));
10667 for ( int isFirst = 0; isFirst < 2; ++isFirst )
10669 _LayerEdge* edge = isFirst ? ledges.front() : ledges.back();
10670 _EdgesOnShape* eos = data.GetShapeEdges( edge );
10671 if ( eos && eos->SWOLType() == TopAbs_EDGE )
10673 vector< const SMDS_MeshNode*>& nn = edge->_nodes;
10674 if ( nn.size() < 2 || nn[1]->GetInverseElementIterator( SMDSAbs_Edge )->more() )
10676 helper.SetSubShape( eos->_sWOL );
10677 helper.SetElementsOnShape( true );
10678 for ( size_t z = 1; z < nn.size(); ++z )
10679 helper.AddEdge( nn[z-1], nn[z] );
10683 } // loop on EDGE's
10684 } // loop on _SolidData's