1 // Copyright (C) 2007-2019 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 "ObjectPool.hxx"
27 #include "SMDS_EdgePosition.hxx"
28 #include "SMDS_FaceOfNodes.hxx"
29 #include "SMDS_FacePosition.hxx"
30 #include "SMDS_MeshNode.hxx"
31 #include "SMDS_PolygonalFaceOfNodes.hxx"
32 #include "SMDS_SetIterator.hxx"
33 #include "SMESHDS_Group.hxx"
34 #include "SMESHDS_Hypothesis.hxx"
35 #include "SMESHDS_Mesh.hxx"
36 #include "SMESH_Algo.hxx"
37 #include "SMESH_Block.hxx"
38 #include "SMESH_ComputeError.hxx"
39 #include "SMESH_ControlsDef.hxx"
40 #include "SMESH_Gen.hxx"
41 #include "SMESH_Group.hxx"
42 #include "SMESH_HypoFilter.hxx"
43 #include "SMESH_Mesh.hxx"
44 #include "SMESH_MeshAlgos.hxx"
45 #include "SMESH_MeshEditor.hxx"
46 #include "SMESH_MesherHelper.hxx"
47 #include "SMESH_ProxyMesh.hxx"
48 #include "SMESH_subMesh.hxx"
49 #include "SMESH_subMeshEventListener.hxx"
50 #include "StdMeshers_FaceSide.hxx"
51 #include "StdMeshers_ProjectionUtils.hxx"
52 #include "StdMeshers_ViscousLayers2D.hxx"
54 #include <Adaptor3d_HSurface.hxx>
55 #include <BRepAdaptor_Curve.hxx>
56 #include <BRepAdaptor_Curve2d.hxx>
57 #include <BRepAdaptor_Surface.hxx>
58 //#include <BRepLProp_CLProps.hxx>
59 #include <BRepLProp_SLProps.hxx>
60 #include <BRepOffsetAPI_MakeOffsetShape.hxx>
61 #include <BRep_Tool.hxx>
62 #include <Bnd_B2d.hxx>
63 #include <Bnd_B3d.hxx>
65 #include <GCPnts_AbscissaPoint.hxx>
66 #include <GCPnts_TangentialDeflection.hxx>
67 #include <Geom2d_Circle.hxx>
68 #include <Geom2d_Line.hxx>
69 #include <Geom2d_TrimmedCurve.hxx>
70 #include <GeomAdaptor_Curve.hxx>
71 #include <GeomLib.hxx>
72 #include <Geom_Circle.hxx>
73 #include <Geom_Curve.hxx>
74 #include <Geom_Line.hxx>
75 #include <Geom_TrimmedCurve.hxx>
76 #include <Precision.hxx>
77 #include <Standard_ErrorHandler.hxx>
78 #include <Standard_Failure.hxx>
79 #include <TColStd_Array1OfReal.hxx>
81 #include <TopExp_Explorer.hxx>
82 #include <TopTools_IndexedMapOfShape.hxx>
83 #include <TopTools_ListOfShape.hxx>
84 #include <TopTools_MapIteratorOfMapOfShape.hxx>
85 #include <TopTools_MapOfShape.hxx>
87 #include <TopoDS_Edge.hxx>
88 #include <TopoDS_Face.hxx>
89 #include <TopoDS_Vertex.hxx>
91 #include <gp_Cone.hxx>
92 #include <gp_Sphere.hxx>
101 #include <unordered_map>
105 //#define __NOT_INVALIDATE_BAD_SMOOTH
106 //#define __NODES_AT_POS
109 #define INCREMENTAL_SMOOTH // smooth only if min angle is too small
110 #define BLOCK_INFLATION // of individual _LayerEdge's
111 #define OLD_NEF_POLYGON
115 //================================================================================
120 enum UIndex { U_TGT = 1, U_SRC, LEN_TGT };
122 const double theMinSmoothCosin = 0.1;
123 const double theSmoothThickToElemSizeRatio = 0.6;
124 const double theMinSmoothTriaAngle = 30;
125 const double theMinSmoothQuadAngle = 45;
127 // what part of thickness is allowed till intersection
128 // (defined by SALOME_TESTS/Grids/smesh/viscous_layers_00/A5)
129 const double theThickToIntersection = 1.5;
131 bool needSmoothing( double cosin, double tgtThick, double elemSize )
133 return cosin * tgtThick > theSmoothThickToElemSizeRatio * elemSize;
135 double getSmoothingThickness( double cosin, double elemSize )
137 return theSmoothThickToElemSizeRatio * elemSize / cosin;
141 * \brief SMESH_ProxyMesh computed by _ViscousBuilder for a SOLID.
142 * It is stored in a SMESH_subMesh of the SOLID as SMESH_subMeshEventListenerData
144 struct _MeshOfSolid : public SMESH_ProxyMesh,
145 public SMESH_subMeshEventListenerData
147 bool _n2nMapComputed;
148 SMESH_ComputeErrorPtr _warning;
150 _MeshOfSolid( SMESH_Mesh* mesh)
151 :SMESH_subMeshEventListenerData( /*isDeletable=*/true),_n2nMapComputed(false)
153 SMESH_ProxyMesh::setMesh( *mesh );
156 // returns submesh for a geom face
157 SMESH_ProxyMesh::SubMesh* getFaceSubM(const TopoDS_Face& F, bool create=false)
159 TGeomID i = SMESH_ProxyMesh::shapeIndex(F);
160 return create ? SMESH_ProxyMesh::getProxySubMesh(i) : findProxySubMesh(i);
162 void setNode2Node(const SMDS_MeshNode* srcNode,
163 const SMDS_MeshNode* proxyNode,
164 const SMESH_ProxyMesh::SubMesh* subMesh)
166 SMESH_ProxyMesh::setNode2Node( srcNode,proxyNode,subMesh);
169 //--------------------------------------------------------------------------------
171 * \brief Listener of events of 3D sub-meshes computed with viscous layers.
172 * It is used to clear an inferior dim sub-meshes modified by viscous layers
174 class _ShrinkShapeListener : SMESH_subMeshEventListener
176 _ShrinkShapeListener()
177 : SMESH_subMeshEventListener(/*isDeletable=*/false,
178 "StdMeshers_ViscousLayers::_ShrinkShapeListener") {}
180 static SMESH_subMeshEventListener* Get() { static _ShrinkShapeListener l; return &l; }
181 virtual void ProcessEvent(const int event,
183 SMESH_subMesh* solidSM,
184 SMESH_subMeshEventListenerData* data,
185 const SMESH_Hypothesis* hyp)
187 if ( SMESH_subMesh::COMPUTE_EVENT == eventType && solidSM->IsEmpty() && data )
189 SMESH_subMeshEventListener::ProcessEvent(event,eventType,solidSM,data,hyp);
193 //--------------------------------------------------------------------------------
195 * \brief Listener of events of 3D sub-meshes computed with viscous layers.
196 * It is used to store data computed by _ViscousBuilder for a sub-mesh and to
197 * delete the data as soon as it has been used
199 class _ViscousListener : SMESH_subMeshEventListener
202 SMESH_subMeshEventListener(/*isDeletable=*/false,
203 "StdMeshers_ViscousLayers::_ViscousListener") {}
204 static SMESH_subMeshEventListener* Get() { static _ViscousListener l; return &l; }
206 virtual void ProcessEvent(const int event,
208 SMESH_subMesh* subMesh,
209 SMESH_subMeshEventListenerData* data,
210 const SMESH_Hypothesis* hyp)
212 if (( SMESH_subMesh::COMPUTE_EVENT == eventType ) &&
213 ( SMESH_subMesh::CHECK_COMPUTE_STATE != event &&
214 SMESH_subMesh::SUBMESH_COMPUTED != event ))
216 // delete SMESH_ProxyMesh containing temporary faces
217 subMesh->DeleteEventListener( this );
220 // Finds or creates proxy mesh of the solid
221 static _MeshOfSolid* GetSolidMesh(SMESH_Mesh* mesh,
222 const TopoDS_Shape& solid,
225 if ( !mesh ) return 0;
226 SMESH_subMesh* sm = mesh->GetSubMesh(solid);
227 _MeshOfSolid* data = (_MeshOfSolid*) sm->GetEventListenerData( Get() );
228 if ( !data && toCreate )
230 data = new _MeshOfSolid(mesh);
231 data->mySubMeshes.push_back( sm ); // to find SOLID by _MeshOfSolid
232 sm->SetEventListener( Get(), data, sm );
236 // Removes proxy mesh of the solid
237 static void RemoveSolidMesh(SMESH_Mesh* mesh, const TopoDS_Shape& solid)
239 mesh->GetSubMesh(solid)->DeleteEventListener( _ViscousListener::Get() );
243 //================================================================================
245 * \brief sets a sub-mesh event listener to clear sub-meshes of sub-shapes of
246 * the main shape when sub-mesh of the main shape is cleared,
247 * for example to clear sub-meshes of FACEs when sub-mesh of a SOLID
250 //================================================================================
252 void ToClearSubWithMain( SMESH_subMesh* sub, const TopoDS_Shape& main)
254 SMESH_subMesh* mainSM = sub->GetFather()->GetSubMesh( main );
255 SMESH_subMeshEventListenerData* data =
256 mainSM->GetEventListenerData( _ShrinkShapeListener::Get());
259 if ( find( data->mySubMeshes.begin(), data->mySubMeshes.end(), sub ) ==
260 data->mySubMeshes.end())
261 data->mySubMeshes.push_back( sub );
265 data = SMESH_subMeshEventListenerData::MakeData( /*dependent=*/sub );
266 sub->SetEventListener( _ShrinkShapeListener::Get(), data, /*whereToListenTo=*/mainSM );
270 //--------------------------------------------------------------------------------
272 * \brief Simplex (triangle or tetrahedron) based on 1 (tria) or 2 (tet) nodes of
273 * _LayerEdge and 2 nodes of the mesh surface beening smoothed.
274 * The class is used to check validity of face or volumes around a smoothed node;
275 * it stores only 2 nodes as the other nodes are stored by _LayerEdge.
279 const SMDS_MeshNode *_nPrev, *_nNext; // nodes on a smoothed mesh surface
280 const SMDS_MeshNode *_nOpp; // in 2D case, a node opposite to a smoothed node in QUAD
281 _Simplex(const SMDS_MeshNode* nPrev=0,
282 const SMDS_MeshNode* nNext=0,
283 const SMDS_MeshNode* nOpp=0)
284 : _nPrev(nPrev), _nNext(nNext), _nOpp(nOpp) {}
285 bool IsForward(const gp_XYZ* pntSrc, const gp_XYZ* pntTgt, double& vol) const
287 const double M[3][3] =
288 {{ _nNext->X() - pntSrc->X(), _nNext->Y() - pntSrc->Y(), _nNext->Z() - pntSrc->Z() },
289 { pntTgt->X() - pntSrc->X(), pntTgt->Y() - pntSrc->Y(), pntTgt->Z() - pntSrc->Z() },
290 { _nPrev->X() - pntSrc->X(), _nPrev->Y() - pntSrc->Y(), _nPrev->Z() - pntSrc->Z() }};
291 vol = ( + M[0][0] * M[1][1] * M[2][2]
292 + M[0][1] * M[1][2] * M[2][0]
293 + M[0][2] * M[1][0] * M[2][1]
294 - M[0][0] * M[1][2] * M[2][1]
295 - M[0][1] * M[1][0] * M[2][2]
296 - M[0][2] * M[1][1] * M[2][0]);
299 bool IsForward(const SMDS_MeshNode* nSrc, const gp_XYZ& pTgt, double& vol) const
301 SMESH_TNodeXYZ pSrc( nSrc );
302 return IsForward( &pSrc, &pTgt, vol );
304 bool IsForward(const gp_XY& tgtUV,
305 const SMDS_MeshNode* smoothedNode,
306 const TopoDS_Face& face,
307 SMESH_MesherHelper& helper,
308 const double refSign) const
310 gp_XY prevUV = helper.GetNodeUV( face, _nPrev, smoothedNode );
311 gp_XY nextUV = helper.GetNodeUV( face, _nNext, smoothedNode );
312 gp_Vec2d v1( tgtUV, prevUV ), v2( tgtUV, nextUV );
314 return d*refSign > 1e-100;
316 bool IsMinAngleOK( const gp_XYZ& pTgt, double& minAngle ) const
318 SMESH_TNodeXYZ pPrev( _nPrev ), pNext( _nNext );
319 if ( !_nOpp ) // triangle
321 gp_Vec tp( pPrev - pTgt ), pn( pNext - pPrev ), nt( pTgt - pNext );
322 double tp2 = tp.SquareMagnitude();
323 double pn2 = pn.SquareMagnitude();
324 double nt2 = nt.SquareMagnitude();
326 if ( tp2 < pn2 && tp2 < nt2 )
327 minAngle = ( nt * -pn ) * ( nt * -pn ) / nt2 / pn2;
328 else if ( pn2 < nt2 )
329 minAngle = ( tp * -nt ) * ( tp * -nt ) / tp2 / nt2;
331 minAngle = ( pn * -tp ) * ( pn * -tp ) / pn2 / tp2;
333 static double theMaxCos2 = ( Cos( theMinSmoothTriaAngle * M_PI / 180. ) *
334 Cos( theMinSmoothTriaAngle * M_PI / 180. ));
335 return minAngle < theMaxCos2;
339 SMESH_TNodeXYZ pOpp( _nOpp );
340 gp_Vec tp( pPrev - pTgt ), po( pOpp - pPrev ), on( pNext - pOpp), nt( pTgt - pNext );
341 double tp2 = tp.SquareMagnitude();
342 double po2 = po.SquareMagnitude();
343 double on2 = on.SquareMagnitude();
344 double nt2 = nt.SquareMagnitude();
345 minAngle = Max( Max((( tp * -nt ) * ( tp * -nt ) / tp2 / nt2 ),
346 (( po * -tp ) * ( po * -tp ) / po2 / tp2 )),
347 Max((( on * -po ) * ( on * -po ) / on2 / po2 ),
348 (( nt * -on ) * ( nt * -on ) / nt2 / on2 )));
350 static double theMaxCos2 = ( Cos( theMinSmoothQuadAngle * M_PI / 180. ) *
351 Cos( theMinSmoothQuadAngle * M_PI / 180. ));
352 return minAngle < theMaxCos2;
355 bool IsNeighbour(const _Simplex& other) const
357 return _nPrev == other._nNext || _nNext == other._nPrev;
359 bool Includes( const SMDS_MeshNode* node ) const { return _nPrev == node || _nNext == node; }
360 static void GetSimplices( const SMDS_MeshNode* node,
361 vector<_Simplex>& simplices,
362 const set<TGeomID>& ingnoreShapes,
363 const _SolidData* dataToCheckOri = 0,
364 const bool toSort = false);
365 static void SortSimplices(vector<_Simplex>& simplices);
367 //--------------------------------------------------------------------------------
369 * Structure used to take into account surface curvature while smoothing
374 double _k; // factor to correct node smoothed position
375 double _h2lenRatio; // avgNormProj / (2*avgDist)
376 gp_Pnt2d _uv; // UV used in putOnOffsetSurface()
378 static _Curvature* New( double avgNormProj, double avgDist );
379 double lenDelta(double len) const { return _k * ( _r + len ); }
380 double lenDeltaByDist(double dist) const { return dist * _h2lenRatio; }
382 //--------------------------------------------------------------------------------
386 struct _EdgesOnShape;
388 typedef map< const SMDS_MeshNode*, _LayerEdge*, TIDCompare > TNode2Edge;
390 //--------------------------------------------------------------------------------
392 * \brief Edge normal to surface, connecting a node on solid surface (_nodes[0])
393 * and a node of the most internal layer (_nodes.back())
397 typedef gp_XYZ (_LayerEdge::*PSmooFun)();
399 vector< const SMDS_MeshNode*> _nodes;
401 gp_XYZ _normal; // to boundary of solid
402 vector<gp_XYZ> _pos; // points computed during inflation
403 double _len; // length achieved with the last inflation step
404 double _maxLen; // maximal possible length
405 double _cosin; // of angle (_normal ^ surface)
406 double _minAngle; // of _simplices
407 double _lenFactor; // to compute _len taking _cosin into account
410 // simplices connected to the source node (_nodes[0]);
411 // used for smoothing and quality check of _LayerEdge's based on the FACE
412 vector<_Simplex> _simplices;
413 vector<_LayerEdge*> _neibors; // all surrounding _LayerEdge's
414 PSmooFun _smooFunction; // smoothing function
415 _Curvature* _curvature;
416 // data for smoothing of _LayerEdge's based on the EDGE
417 _2NearEdges* _2neibors;
419 enum EFlags { TO_SMOOTH = 0x0000001,
420 MOVED = 0x0000002, // set by _neibors[i]->SetNewLength()
421 SMOOTHED = 0x0000004, // set by _LayerEdge::Smooth()
422 DIFFICULT = 0x0000008, // near concave VERTEX
423 ON_CONCAVE_FACE = 0x0000010,
424 BLOCKED = 0x0000020, // not to inflate any more
425 INTERSECTED = 0x0000040, // close intersection with a face found
426 NORMAL_UPDATED = 0x0000080,
427 UPD_NORMAL_CONV = 0x0000100, // to update normal on boundary of concave FACE
428 MARKED = 0x0000200, // local usage
429 MULTI_NORMAL = 0x0000400, // a normal is invisible by some of surrounding faces
430 NEAR_BOUNDARY = 0x0000800, // is near FACE boundary forcing smooth
431 SMOOTHED_C1 = 0x0001000, // is on _eosC1
432 DISTORTED = 0x0002000, // was bad before smoothing
433 RISKY_SWOL = 0x0004000, // SWOL is parallel to a source FACE
434 SHRUNK = 0x0008000, // target node reached a tgt position while shrink()
435 UNUSED_FLAG = 0x0100000 // to add user flags after
437 bool Is ( int flag ) const { return _flags & flag; }
438 void Set ( int flag ) { _flags |= flag; }
439 void Unset( int flag ) { _flags &= ~flag; }
440 std::string DumpFlags() const; // debug
442 void SetNewLength( double len, _EdgesOnShape& eos, SMESH_MesherHelper& helper );
443 bool SetNewLength2d( Handle(Geom_Surface)& surface,
444 const TopoDS_Face& F,
446 SMESH_MesherHelper& helper );
447 void SetDataByNeighbors( const SMDS_MeshNode* n1,
448 const SMDS_MeshNode* n2,
449 const _EdgesOnShape& eos,
450 SMESH_MesherHelper& helper);
451 void Block( _SolidData& data );
452 void InvalidateStep( size_t curStep, const _EdgesOnShape& eos, bool restoreLength=false );
453 void ChooseSmooFunction(const set< TGeomID >& concaveVertices,
454 const TNode2Edge& n2eMap);
455 void SmoothPos( const vector< double >& segLen, const double tol );
456 int GetSmoothedPos( const double tol );
457 int Smooth(const int step, const bool isConcaveFace, bool findBest);
458 int Smooth(const int step, bool findBest, vector< _LayerEdge* >& toSmooth );
459 int CheckNeiborsOnBoundary(vector< _LayerEdge* >* badNeibors = 0, bool * needSmooth = 0 );
460 void SmoothWoCheck();
461 bool SmoothOnEdge(Handle(ShapeAnalysis_Surface)& surface,
462 const TopoDS_Face& F,
463 SMESH_MesherHelper& helper);
464 void MoveNearConcaVer( const _EdgesOnShape* eov,
465 const _EdgesOnShape* eos,
467 vector< _LayerEdge* > & badSmooEdges);
468 bool FindIntersection( SMESH_ElementSearcher& searcher,
470 const double& epsilon,
472 const SMDS_MeshElement** face = 0);
473 bool SegTriaInter( const gp_Ax1& lastSegment,
478 const double& epsilon) const;
479 bool SegTriaInter( const gp_Ax1& lastSegment,
480 const SMDS_MeshNode* n0,
481 const SMDS_MeshNode* n1,
482 const SMDS_MeshNode* n2,
484 const double& epsilon) const
485 { return SegTriaInter( lastSegment,
486 SMESH_TNodeXYZ( n0 ), SMESH_TNodeXYZ( n1 ), SMESH_TNodeXYZ( n2 ),
489 const gp_XYZ& PrevPos() const { return _pos[ _pos.size() - 2 ]; }
490 gp_XYZ PrevCheckPos( _EdgesOnShape* eos=0 ) const;
491 gp_Ax1 LastSegment(double& segLen, _EdgesOnShape& eos) const;
492 gp_XY LastUV( const TopoDS_Face& F, _EdgesOnShape& eos, int which=-1 ) const;
493 bool IsOnEdge() const { return _2neibors; }
494 bool IsOnFace() const { return ( _nodes[0]->GetPosition()->GetDim() == 2 ); }
495 int BaseShapeDim() const { return _nodes[0]->GetPosition()->GetDim(); }
496 gp_XYZ Copy( _LayerEdge& other, _EdgesOnShape& eos, SMESH_MesherHelper& helper );
497 void SetCosin( double cosin );
498 void SetNormal( const gp_XYZ& n ) { _normal = n; }
499 void SetMaxLen( double l ) { _maxLen = l; }
500 int NbSteps() const { return _pos.size() - 1; } // nb inlation steps
501 bool IsNeiborOnEdge( const _LayerEdge* edge ) const;
502 void SetSmooLen( double len ) { // set _len at which smoothing is needed
503 _cosin = len; // as for _LayerEdge's on FACE _cosin is not used
505 double GetSmooLen() { return _cosin; } // for _LayerEdge's on FACE _cosin is not used
507 gp_XYZ smoothLaplacian();
508 gp_XYZ smoothAngular();
509 gp_XYZ smoothLengthWeighted();
510 gp_XYZ smoothCentroidal();
511 gp_XYZ smoothNefPolygon();
513 enum { FUN_LAPLACIAN, FUN_LENWEIGHTED, FUN_CENTROIDAL, FUN_NEFPOLY, FUN_ANGULAR, FUN_NB };
514 static const int theNbSmooFuns = FUN_NB;
515 static PSmooFun _funs[theNbSmooFuns];
516 static const char* _funNames[theNbSmooFuns+1];
517 int smooFunID( PSmooFun fun=0) const;
519 _LayerEdge::PSmooFun _LayerEdge::_funs[theNbSmooFuns] = { &_LayerEdge::smoothLaplacian,
520 &_LayerEdge::smoothLengthWeighted,
521 &_LayerEdge::smoothCentroidal,
522 &_LayerEdge::smoothNefPolygon,
523 &_LayerEdge::smoothAngular };
524 const char* _LayerEdge::_funNames[theNbSmooFuns+1] = { "Laplacian",
532 bool operator () (const _LayerEdge* e1, const _LayerEdge* e2) const
534 const bool cmpNodes = ( e1 && e2 && e1->_nodes.size() && e2->_nodes.size() );
535 return cmpNodes ? ( e1->_nodes[0]->GetID() < e2->_nodes[0]->GetID()) : ( e1 < e2 );
538 //--------------------------------------------------------------------------------
540 * A 2D half plane used by _LayerEdge::smoothNefPolygon()
544 gp_XY _pos, _dir, _inNorm;
545 bool IsOut( const gp_XY p, const double tol ) const
547 return _inNorm * ( p - _pos ) < -tol;
549 bool FindIntersection( const _halfPlane& hp, gp_XY & intPnt )
551 //const double eps = 1e-10;
552 double D = _dir.Crossed( hp._dir );
553 if ( fabs(D) < std::numeric_limits<double>::min())
555 gp_XY vec21 = _pos - hp._pos;
556 double u = hp._dir.Crossed( vec21 ) / D;
557 intPnt = _pos + _dir * u;
561 //--------------------------------------------------------------------------------
563 * Structure used to smooth a _LayerEdge based on an EDGE.
567 double _wgt [2]; // weights of _nodes
568 _LayerEdge* _edges[2];
570 // normal to plane passing through _LayerEdge._normal and tangent of EDGE
573 _2NearEdges() { _edges[0]=_edges[1]=0; _plnNorm = 0; }
574 ~_2NearEdges(){ delete _plnNorm; }
575 const SMDS_MeshNode* tgtNode(bool is2nd) {
576 return _edges[is2nd] ? _edges[is2nd]->_nodes.back() : 0;
578 const SMDS_MeshNode* srcNode(bool is2nd) {
579 return _edges[is2nd] ? _edges[is2nd]->_nodes[0] : 0;
582 std::swap( _wgt [0], _wgt [1] );
583 std::swap( _edges[0], _edges[1] );
585 void set( _LayerEdge* e1, _LayerEdge* e2, double w1, double w2 ) {
586 _edges[0] = e1; _edges[1] = e2; _wgt[0] = w1; _wgt[1] = w2;
588 bool include( const _LayerEdge* e ) {
589 return ( _edges[0] == e || _edges[1] == e );
594 //--------------------------------------------------------------------------------
596 * \brief Layers parameters got by averaging several hypotheses
600 AverageHyp( const StdMeshers_ViscousLayers* hyp = 0 )
601 :_nbLayers(0), _nbHyps(0), _method(0), _thickness(0), _stretchFactor(0)
605 void Add( const StdMeshers_ViscousLayers* hyp )
610 _nbLayers = hyp->GetNumberLayers();
611 //_thickness += hyp->GetTotalThickness();
612 _thickness = Max( _thickness, hyp->GetTotalThickness() );
613 _stretchFactor += hyp->GetStretchFactor();
614 _method = hyp->GetMethod();
617 double GetTotalThickness() const { return _thickness; /*_nbHyps ? _thickness / _nbHyps : 0;*/ }
618 double GetStretchFactor() const { return _nbHyps ? _stretchFactor / _nbHyps : 0; }
619 int GetNumberLayers() const { return _nbLayers; }
620 int GetMethod() const { return _method; }
622 bool UseSurfaceNormal() const
623 { return _method == StdMeshers_ViscousLayers::SURF_OFFSET_SMOOTH; }
624 bool ToSmooth() const
625 { return _method == StdMeshers_ViscousLayers::SURF_OFFSET_SMOOTH; }
626 bool IsOffsetMethod() const
627 { return _method == StdMeshers_ViscousLayers::FACE_OFFSET; }
629 bool operator==( const AverageHyp& other ) const
631 return ( _nbLayers == other._nbLayers &&
632 _method == other._method &&
633 Equals( GetTotalThickness(), other.GetTotalThickness() ) &&
634 Equals( GetStretchFactor(), other.GetStretchFactor() ));
636 static bool Equals( double v1, double v2 ) { return Abs( v1 - v2 ) < 0.01 * ( v1 + v2 ); }
639 int _nbLayers, _nbHyps, _method;
640 double _thickness, _stretchFactor;
643 //--------------------------------------------------------------------------------
645 * \brief _LayerEdge's on a shape and other shape data
649 vector< _LayerEdge* > _edges;
653 SMESH_subMesh * _subMesh;
654 // face or edge w/o layer along or near which _edges are inflated
656 bool _isRegularSWOL; // w/o singularities
657 // averaged StdMeshers_ViscousLayers parameters
660 _Smoother1D* _edgeSmoother;
661 vector< _EdgesOnShape* > _eosConcaVer; // edges at concave VERTEXes of a FACE
662 vector< _EdgesOnShape* > _eosC1; // to smooth together several C1 continues shapes
664 typedef std::unordered_map< const SMDS_MeshElement*, gp_XYZ > TFace2NormMap;
665 TFace2NormMap _faceNormals; // if _shape is FACE
666 vector< _EdgesOnShape* > _faceEOS; // to get _faceNormals of adjacent FACEs
668 Handle(ShapeAnalysis_Surface) _offsetSurf;
669 _LayerEdge* _edgeForOffset;
671 _SolidData* _data; // parent SOLID
673 _LayerEdge* operator[](size_t i) const { return (_LayerEdge*) _edges[i]; }
674 size_t size() const { return _edges.size(); }
675 TopAbs_ShapeEnum ShapeType() const
676 { return _shape.IsNull() ? TopAbs_SHAPE : _shape.ShapeType(); }
677 TopAbs_ShapeEnum SWOLType() const
678 { return _sWOL.IsNull() ? TopAbs_SHAPE : _sWOL.ShapeType(); }
679 bool HasC1( const _EdgesOnShape* other ) const
680 { return std::find( _eosC1.begin(), _eosC1.end(), other ) != _eosC1.end(); }
681 bool GetNormal( const SMDS_MeshElement* face, gp_Vec& norm );
682 _SolidData& GetData() const { return *_data; }
684 _EdgesOnShape(): _shapeID(-1), _subMesh(0), _toSmooth(false), _edgeSmoother(0) {}
688 //--------------------------------------------------------------------------------
690 * \brief Convex FACE whose radius of curvature is less than the thickness of
691 * layers. It is used to detect distortion of prisms based on a convex
692 * FACE and to update normals to enable further increasing the thickness
698 // edges whose _simplices are used to detect prism distortion
699 vector< _LayerEdge* > _simplexTestEdges;
701 // map a sub-shape to _SolidData::_edgesOnShape
702 map< TGeomID, _EdgesOnShape* > _subIdToEOS;
706 bool _normalsFixedOnBorders; // used in putOnOffsetSurface()
708 double GetMaxCurvature( _SolidData& data,
710 BRepLProp_SLProps& surfProp,
711 SMESH_MesherHelper& helper);
713 bool GetCenterOfCurvature( _LayerEdge* ledge,
714 BRepLProp_SLProps& surfProp,
715 SMESH_MesherHelper& helper,
716 gp_Pnt & center ) const;
717 bool CheckPrisms() const;
720 //--------------------------------------------------------------------------------
722 * \brief Structure holding _LayerEdge's based on EDGEs that will collide
723 * at inflation up to the full thickness. A detected collision
724 * is fixed in updateNormals()
726 struct _CollisionEdges
729 vector< _LayerEdge* > _intEdges; // each pair forms an intersected quadrangle
730 const SMDS_MeshNode* nSrc(int i) const { return _intEdges[i]->_nodes[0]; }
731 const SMDS_MeshNode* nTgt(int i) const { return _intEdges[i]->_nodes.back(); }
734 //--------------------------------------------------------------------------------
736 * \brief Data of a SOLID
740 typedef const StdMeshers_ViscousLayers* THyp;
742 TopTools_MapOfShape _before; // SOLIDs to be computed before _solid
743 TGeomID _index; // SOLID id
744 _MeshOfSolid* _proxyMesh;
747 list< TopoDS_Shape > _hypShapes;
748 map< TGeomID, THyp > _face2hyp; // filled if _hyps.size() > 1
749 set< TGeomID > _reversedFaceIds;
750 set< TGeomID > _ignoreFaceIds; // WOL FACEs and FACEs of other SOLIDs
752 double _stepSize, _stepSizeCoeff, _geomSize;
753 const SMDS_MeshNode* _stepSizeNodes[2];
755 TNode2Edge _n2eMap; // nodes and _LayerEdge's based on them
757 // map to find _n2eMap of another _SolidData by a shrink shape shared by two _SolidData's
758 map< TGeomID, TNode2Edge* > _s2neMap;
759 // _LayerEdge's with underlying shapes
760 vector< _EdgesOnShape > _edgesOnShape;
762 // key: an ID of shape (EDGE or VERTEX) shared by a FACE with
763 // layers and a FACE w/o layers
764 // value: the shape (FACE or EDGE) to shrink mesh on.
765 // _LayerEdge's basing on nodes on key shape are inflated along the value shape
766 map< TGeomID, TopoDS_Shape > _shrinkShape2Shape;
768 // Convex FACEs whose radius of curvature is less than the thickness of layers
769 map< TGeomID, _ConvexFace > _convexFaces;
771 // shapes (EDGEs and VERTEXes) shrink from which is forbidden due to collisions with
772 // the adjacent SOLID
773 set< TGeomID > _noShrinkShapes;
775 int _nbShapesToSmooth;
777 vector< _CollisionEdges > _collisionEdges;
778 set< TGeomID > _concaveFaces;
780 double _maxThickness; // of all _hyps
781 double _minThickness; // of all _hyps
783 double _epsilon; // precision for SegTriaInter()
785 SMESH_MesherHelper* _helper;
787 _SolidData(const TopoDS_Shape& s=TopoDS_Shape(),
789 :_solid(s), _proxyMesh(m), _done(false),_helper(0) {}
790 ~_SolidData() { delete _helper; _helper = 0; }
792 void SortOnEdge( const TopoDS_Edge& E, vector< _LayerEdge* >& edges);
793 void Sort2NeiborsOnEdge( vector< _LayerEdge* >& edges );
795 _ConvexFace* GetConvexFace( const TGeomID faceID ) {
796 map< TGeomID, _ConvexFace >::iterator id2face = _convexFaces.find( faceID );
797 return id2face == _convexFaces.end() ? 0 : & id2face->second;
799 _EdgesOnShape* GetShapeEdges(const TGeomID shapeID );
800 _EdgesOnShape* GetShapeEdges(const TopoDS_Shape& shape );
801 _EdgesOnShape* GetShapeEdges(const _LayerEdge* edge )
802 { return GetShapeEdges( edge->_nodes[0]->getshapeId() ); }
804 SMESH_MesherHelper& GetHelper() const { return *_helper; }
806 void UnmarkEdges( int flag = _LayerEdge::MARKED ) {
807 for ( size_t i = 0; i < _edgesOnShape.size(); ++i )
808 for ( size_t j = 0; j < _edgesOnShape[i]._edges.size(); ++j )
809 _edgesOnShape[i]._edges[j]->Unset( flag );
811 void AddShapesToSmooth( const set< _EdgesOnShape* >& shape,
812 const set< _EdgesOnShape* >* edgesNoAnaSmooth=0 );
814 void PrepareEdgesToSmoothOnFace( _EdgesOnShape* eof, bool substituteSrcNodes );
816 //--------------------------------------------------------------------------------
818 * \brief Offset plane used in getNormalByOffset()
824 int _faceIndexNext[2];
825 gp_Lin _lines[2]; // line of intersection with neighbor _OffsetPlane's
828 _isLineOK[0] = _isLineOK[1] = false; _faceIndexNext[0] = _faceIndexNext[1] = -1;
830 void ComputeIntersectionLine( _OffsetPlane& pln,
831 const TopoDS_Edge& E,
832 const TopoDS_Vertex& V );
833 gp_XYZ GetCommonPoint(bool& isFound, const TopoDS_Vertex& V) const;
834 int NbLines() const { return _isLineOK[0] + _isLineOK[1]; }
836 //--------------------------------------------------------------------------------
838 * \brief Container of centers of curvature at nodes on an EDGE bounding _ConvexFace
840 struct _CentralCurveOnEdge
843 vector< gp_Pnt > _curvaCenters;
844 vector< _LayerEdge* > _ledges;
845 vector< gp_XYZ > _normals; // new normal for each of _ledges
846 vector< double > _segLength2;
849 TopoDS_Face _adjFace;
850 bool _adjFaceToSmooth;
852 void Append( const gp_Pnt& center, _LayerEdge* ledge )
854 if ( ledge->Is( _LayerEdge::MULTI_NORMAL ))
856 if ( _curvaCenters.size() > 0 )
857 _segLength2.push_back( center.SquareDistance( _curvaCenters.back() ));
858 _curvaCenters.push_back( center );
859 _ledges.push_back( ledge );
860 _normals.push_back( ledge->_normal );
862 bool FindNewNormal( const gp_Pnt& center, gp_XYZ& newNormal );
863 void SetShapes( const TopoDS_Edge& edge,
864 const _ConvexFace& convFace,
866 SMESH_MesherHelper& helper);
868 //--------------------------------------------------------------------------------
870 * \brief Data of node on a shrinked FACE
874 const SMDS_MeshNode* _node;
875 vector<_Simplex> _simplices; // for quality check
877 enum SmoothType { LAPLACIAN, CENTROIDAL, ANGULAR, TFI };
879 bool Smooth(int& badNb,
880 Handle(Geom_Surface)& surface,
881 SMESH_MesherHelper& helper,
882 const double refSign,
886 gp_XY computeAngularPos(vector<gp_XY>& uv,
887 const gp_XY& uvToFix,
888 const double refSign );
892 //--------------------------------------------------------------------------------
894 * \brief Builder of viscous layers
896 class _ViscousBuilder
901 SMESH_ComputeErrorPtr Compute(SMESH_Mesh& mesh,
902 const TopoDS_Shape& shape);
903 // check validity of hypotheses
904 SMESH_ComputeErrorPtr CheckHypotheses( SMESH_Mesh& mesh,
905 const TopoDS_Shape& shape );
907 // restore event listeners used to clear an inferior dim sub-mesh modified by viscous layers
908 void RestoreListeners();
910 // computes SMESH_ProxyMesh::SubMesh::_n2n;
911 bool MakeN2NMap( _MeshOfSolid* pm );
915 bool findSolidsWithLayers();
916 bool setBefore( _SolidData& solidBefore, _SolidData& solidAfter );
917 bool findFacesWithLayers(const bool onlyWith=false);
918 void findPeriodicFaces();
919 void getIgnoreFaces(const TopoDS_Shape& solid,
920 const StdMeshers_ViscousLayers* hyp,
921 const TopoDS_Shape& hypShape,
922 set<TGeomID>& ignoreFaces);
923 void makeEdgesOnShape();
924 bool makeLayer(_SolidData& data);
925 void setShapeData( _EdgesOnShape& eos, SMESH_subMesh* sm, _SolidData& data );
926 bool setEdgeData( _LayerEdge& edge, _EdgesOnShape& eos,
927 SMESH_MesherHelper& helper, _SolidData& data);
928 gp_XYZ getFaceNormal(const SMDS_MeshNode* n,
929 const TopoDS_Face& face,
930 SMESH_MesherHelper& helper,
932 bool shiftInside=false);
933 bool getFaceNormalAtSingularity(const gp_XY& uv,
934 const TopoDS_Face& face,
935 SMESH_MesherHelper& helper,
937 gp_XYZ getWeigthedNormal( const _LayerEdge* edge );
938 gp_XYZ getNormalByOffset( _LayerEdge* edge,
939 std::pair< TopoDS_Face, gp_XYZ > fId2Normal[],
941 bool lastNoOffset = false);
942 bool findNeiborsOnEdge(const _LayerEdge* edge,
943 const SMDS_MeshNode*& n1,
944 const SMDS_MeshNode*& n2,
947 void findSimplexTestEdges( _SolidData& data,
948 vector< vector<_LayerEdge*> >& edgesByGeom);
949 void computeGeomSize( _SolidData& data );
950 bool findShapesToSmooth( _SolidData& data);
951 void limitStepSizeByCurvature( _SolidData& data );
952 void limitStepSize( _SolidData& data,
953 const SMDS_MeshElement* face,
954 const _LayerEdge* maxCosinEdge );
955 void limitStepSize( _SolidData& data, const double minSize);
956 bool inflate(_SolidData& data);
957 bool smoothAndCheck(_SolidData& data, const int nbSteps, double & distToIntersection);
958 int invalidateBadSmooth( _SolidData& data,
959 SMESH_MesherHelper& helper,
960 vector< _LayerEdge* >& badSmooEdges,
961 vector< _EdgesOnShape* >& eosC1,
963 void makeOffsetSurface( _EdgesOnShape& eos, SMESH_MesherHelper& );
964 void putOnOffsetSurface( _EdgesOnShape& eos, int infStep,
965 vector< _EdgesOnShape* >& eosC1,
966 int smooStep=0, int moveAll=false );
967 void findCollisionEdges( _SolidData& data, SMESH_MesherHelper& helper );
968 void findEdgesToUpdateNormalNearConvexFace( _ConvexFace & convFace,
970 SMESH_MesherHelper& helper );
971 void limitMaxLenByCurvature( _SolidData& data, SMESH_MesherHelper& helper );
972 void limitMaxLenByCurvature( _LayerEdge* e1, _LayerEdge* e2,
973 _EdgesOnShape& eos1, _EdgesOnShape& eos2,
974 const bool isSmoothable );
975 bool updateNormals( _SolidData& data, SMESH_MesherHelper& helper, int stepNb, double stepSize );
976 bool updateNormalsOfConvexFaces( _SolidData& data,
977 SMESH_MesherHelper& helper,
979 void updateNormalsOfC1Vertices( _SolidData& data );
980 bool updateNormalsOfSmoothed( _SolidData& data,
981 SMESH_MesherHelper& helper,
983 const double stepSize );
984 bool isNewNormalOk( _SolidData& data,
986 const gp_XYZ& newNormal);
987 bool refine(_SolidData& data);
988 bool shrink(_SolidData& data);
989 bool prepareEdgeToShrink( _LayerEdge& edge, _EdgesOnShape& eos,
990 SMESH_MesherHelper& helper,
991 const SMESHDS_SubMesh* faceSubMesh );
992 void restoreNoShrink( _LayerEdge& edge ) const;
993 void fixBadFaces(const TopoDS_Face& F,
994 SMESH_MesherHelper& helper,
997 set<const SMDS_MeshNode*> * involvedNodes=NULL);
998 bool addBoundaryElements(_SolidData& data);
1000 bool error( const string& text, int solidID=-1 );
1001 SMESHDS_Mesh* getMeshDS() const { return _mesh->GetMeshDS(); }
1004 void makeGroupOfLE();
1007 SMESH_ComputeErrorPtr _error;
1009 vector< _SolidData > _sdVec;
1010 TopTools_IndexedMapOfShape _solids; // to find _SolidData by a solid
1011 TopTools_MapOfShape _shrunkFaces;
1012 std::unique_ptr<Periodicity> _periodicity;
1017 //--------------------------------------------------------------------------------
1019 * \brief Shrinker of nodes on the EDGE
1023 TopoDS_Edge _geomEdge;
1024 vector<double> _initU;
1025 vector<double> _normPar;
1026 vector<const SMDS_MeshNode*> _nodes;
1027 const _LayerEdge* _edges[2];
1030 void AddEdge( const _LayerEdge* e, _EdgesOnShape& eos, SMESH_MesherHelper& helper );
1031 void Compute(bool set3D, SMESH_MesherHelper& helper);
1032 void RestoreParams();
1033 void SwapSrcTgtNodes(SMESHDS_Mesh* mesh);
1034 const TopoDS_Edge& GeomEdge() const { return _geomEdge; }
1035 const SMDS_MeshNode* TgtNode( bool is2nd ) const
1036 { return _edges[is2nd] ? _edges[is2nd]->_nodes.back() : 0; }
1037 const SMDS_MeshNode* SrcNode( bool is2nd ) const
1038 { return _edges[is2nd] ? _edges[is2nd]->_nodes[0] : 0; }
1040 //--------------------------------------------------------------------------------
1042 * \brief Smoother of _LayerEdge's on EDGE.
1046 struct OffPnt // point of the offsetted EDGE
1048 gp_XYZ _xyz; // coord of a point inflated from EDGE w/o smooth
1049 double _len; // length reached at previous inflation step
1050 double _param; // on EDGE
1051 _2NearEdges _2edges; // 2 neighbor _LayerEdge's
1052 gp_XYZ _edgeDir;// EDGE tangent at _param
1053 double Distance( const OffPnt& p ) const { return ( _xyz - p._xyz ).Modulus(); }
1055 vector< OffPnt > _offPoints;
1056 vector< double > _leParams; // normalized param of _eos._edges on EDGE
1057 Handle(Geom_Curve) _anaCurve; // for analytic smooth
1058 _LayerEdge _leOnV[2]; // _LayerEdge's holding normal to the EDGE at VERTEXes
1059 gp_XYZ _edgeDir[2]; // tangent at VERTEXes
1060 size_t _iSeg[2]; // index of segment where extreme tgt node is projected
1061 _EdgesOnShape& _eos;
1062 double _curveLen; // length of the EDGE
1063 std::pair<int,int> _eToSmooth[2]; // <from,to> indices of _LayerEdge's in _eos
1065 static Handle(Geom_Curve) CurveForSmooth( const TopoDS_Edge& E,
1067 SMESH_MesherHelper& helper);
1069 _Smoother1D( Handle(Geom_Curve) curveForSmooth,
1070 _EdgesOnShape& eos )
1071 : _anaCurve( curveForSmooth ), _eos( eos )
1074 bool Perform(_SolidData& data,
1075 Handle(ShapeAnalysis_Surface)& surface,
1076 const TopoDS_Face& F,
1077 SMESH_MesherHelper& helper );
1079 void prepare(_SolidData& data );
1081 void findEdgesToSmooth();
1083 bool isToSmooth( int iE );
1085 bool smoothAnalyticEdge( _SolidData& data,
1086 Handle(ShapeAnalysis_Surface)& surface,
1087 const TopoDS_Face& F,
1088 SMESH_MesherHelper& helper);
1089 bool smoothComplexEdge( _SolidData& data,
1090 Handle(ShapeAnalysis_Surface)& surface,
1091 const TopoDS_Face& F,
1092 SMESH_MesherHelper& helper);
1093 gp_XYZ getNormalNormal( const gp_XYZ & normal,
1094 const gp_XYZ& edgeDir);
1095 _LayerEdge* getLEdgeOnV( bool is2nd )
1097 return _eos._edges[ is2nd ? _eos._edges.size()-1 : 0 ]->_2neibors->_edges[ is2nd ];
1099 bool isAnalytic() const { return !_anaCurve.IsNull(); }
1101 void offPointsToPython() const; // debug
1103 //--------------------------------------------------------------------------------
1105 * \brief Class of temporary mesh face.
1106 * We can't use SMDS_FaceOfNodes since it's impossible to set it's ID which is
1107 * needed because SMESH_ElementSearcher internally uses set of elements sorted by ID
1109 struct _TmpMeshFace : public SMDS_PolygonalFaceOfNodes
1111 const SMDS_MeshElement* _srcFace;
1113 _TmpMeshFace( const vector<const SMDS_MeshNode*>& nodes,
1116 const SMDS_MeshElement* srcFace=0 ):
1117 SMDS_PolygonalFaceOfNodes(nodes), _srcFace( srcFace ) { setID( ID ); setShapeID( faceID ); }
1118 virtual SMDSAbs_EntityType GetEntityType() const
1119 { return _srcFace ? _srcFace->GetEntityType() : SMDSEntity_Quadrangle; }
1120 virtual SMDSAbs_GeometryType GetGeomType() const
1121 { return _srcFace ? _srcFace->GetGeomType() : SMDSGeom_QUADRANGLE; }
1123 //--------------------------------------------------------------------------------
1125 * \brief Class of temporary mesh quadrangle face storing _LayerEdge it's based on
1127 struct _TmpMeshFaceOnEdge : public _TmpMeshFace
1129 _LayerEdge *_le1, *_le2;
1130 _TmpMeshFaceOnEdge( _LayerEdge* le1, _LayerEdge* le2, int ID ):
1131 _TmpMeshFace( vector<const SMDS_MeshNode*>(4), ID ), _le1(le1), _le2(le2)
1133 myNodes[0]=_le1->_nodes[0];
1134 myNodes[1]=_le1->_nodes.back();
1135 myNodes[2]=_le2->_nodes.back();
1136 myNodes[3]=_le2->_nodes[0];
1138 const SMDS_MeshNode* n( size_t i ) const
1140 return myNodes[ i ];
1142 gp_XYZ GetDir() const // return average direction of _LayerEdge's, normal to EDGE
1144 SMESH_TNodeXYZ p0s( myNodes[0] );
1145 SMESH_TNodeXYZ p0t( myNodes[1] );
1146 SMESH_TNodeXYZ p1t( myNodes[2] );
1147 SMESH_TNodeXYZ p1s( myNodes[3] );
1148 gp_XYZ v0 = p0t - p0s;
1149 gp_XYZ v1 = p1t - p1s;
1150 gp_XYZ v01 = p1s - p0s;
1151 gp_XYZ n = ( v0 ^ v01 ) + ( v1 ^ v01 );
1156 gp_XYZ GetDir(_LayerEdge* le1, _LayerEdge* le2) // return average direction of _LayerEdge's
1158 myNodes[0]=le1->_nodes[0];
1159 myNodes[1]=le1->_nodes.back();
1160 myNodes[2]=le2->_nodes.back();
1161 myNodes[3]=le2->_nodes[0];
1165 //--------------------------------------------------------------------------------
1167 * \brief Retriever of node coordinates either directly or from a surface by node UV.
1168 * \warning Location of a surface is ignored
1170 struct _NodeCoordHelper
1172 SMESH_MesherHelper& _helper;
1173 const TopoDS_Face& _face;
1174 Handle(Geom_Surface) _surface;
1175 gp_XYZ (_NodeCoordHelper::* _fun)(const SMDS_MeshNode* n) const;
1177 _NodeCoordHelper(const TopoDS_Face& F, SMESH_MesherHelper& helper, bool is2D)
1178 : _helper( helper ), _face( F )
1182 TopLoc_Location loc;
1183 _surface = BRep_Tool::Surface( _face, loc );
1185 if ( _surface.IsNull() )
1186 _fun = & _NodeCoordHelper::direct;
1188 _fun = & _NodeCoordHelper::byUV;
1190 gp_XYZ operator()(const SMDS_MeshNode* n) const { return (this->*_fun)( n ); }
1193 gp_XYZ direct(const SMDS_MeshNode* n) const
1195 return SMESH_TNodeXYZ( n );
1197 gp_XYZ byUV (const SMDS_MeshNode* n) const
1199 gp_XY uv = _helper.GetNodeUV( _face, n );
1200 return _surface->Value( uv.X(), uv.Y() ).XYZ();
1204 //================================================================================
1206 * \brief Check angle between vectors
1208 //================================================================================
1210 inline bool isLessAngle( const gp_Vec& v1, const gp_Vec& v2, const double cos )
1212 double dot = v1 * v2; // cos * |v1| * |v2|
1213 double l1 = v1.SquareMagnitude();
1214 double l2 = v2.SquareMagnitude();
1215 return (( dot * cos >= 0 ) &&
1216 ( dot * dot ) / l1 / l2 >= ( cos * cos ));
1221 ObjectPool< _LayerEdge > _edgePool;
1222 ObjectPool< _Curvature > _curvaturePool;
1223 ObjectPool< _2NearEdges > _nearEdgesPool;
1225 static _Factory* & me()
1227 static _Factory* theFactory = 0;
1232 _Factory() { me() = this; }
1233 ~_Factory() { me() = 0; }
1235 static _LayerEdge* NewLayerEdge() { return me()->_edgePool.getNew(); }
1236 static _Curvature * NewCurvature() { return me()->_curvaturePool.getNew(); }
1237 static _2NearEdges* NewNearEdges() { return me()->_nearEdgesPool.getNew(); }
1240 } // namespace VISCOUS_3D
1244 //================================================================================
1245 // StdMeshers_ViscousLayers hypothesis
1247 StdMeshers_ViscousLayers::StdMeshers_ViscousLayers(int hypId, SMESH_Gen* gen)
1248 :SMESH_Hypothesis(hypId, gen),
1249 _isToIgnoreShapes(1), _nbLayers(1), _thickness(1), _stretchFactor(1),
1250 _method( SURF_OFFSET_SMOOTH )
1252 _name = StdMeshers_ViscousLayers::GetHypType();
1253 _param_algo_dim = -3; // auxiliary hyp used by 3D algos
1254 } // --------------------------------------------------------------------------------
1255 void StdMeshers_ViscousLayers::SetBndShapes(const std::vector<int>& faceIds, bool toIgnore)
1257 if ( faceIds != _shapeIds )
1258 _shapeIds = faceIds, NotifySubMeshesHypothesisModification();
1259 if ( _isToIgnoreShapes != toIgnore )
1260 _isToIgnoreShapes = toIgnore, NotifySubMeshesHypothesisModification();
1261 } // --------------------------------------------------------------------------------
1262 void StdMeshers_ViscousLayers::SetTotalThickness(double thickness)
1264 if ( thickness != _thickness )
1265 _thickness = thickness, NotifySubMeshesHypothesisModification();
1266 } // --------------------------------------------------------------------------------
1267 void StdMeshers_ViscousLayers::SetNumberLayers(int nb)
1269 if ( _nbLayers != nb )
1270 _nbLayers = nb, NotifySubMeshesHypothesisModification();
1271 } // --------------------------------------------------------------------------------
1272 void StdMeshers_ViscousLayers::SetStretchFactor(double factor)
1274 if ( _stretchFactor != factor )
1275 _stretchFactor = factor, NotifySubMeshesHypothesisModification();
1276 } // --------------------------------------------------------------------------------
1277 void StdMeshers_ViscousLayers::SetMethod( ExtrusionMethod method )
1279 if ( _method != method )
1280 _method = method, NotifySubMeshesHypothesisModification();
1281 } // --------------------------------------------------------------------------------
1282 SMESH_ProxyMesh::Ptr
1283 StdMeshers_ViscousLayers::Compute(SMESH_Mesh& theMesh,
1284 const TopoDS_Shape& theShape,
1285 const bool toMakeN2NMap) const
1287 using namespace VISCOUS_3D;
1288 _ViscousBuilder builder;
1289 SMESH_ComputeErrorPtr err = builder.Compute( theMesh, theShape );
1290 if ( err && !err->IsOK() )
1291 return SMESH_ProxyMesh::Ptr();
1293 vector<SMESH_ProxyMesh::Ptr> components;
1294 TopExp_Explorer exp( theShape, TopAbs_SOLID );
1295 for ( ; exp.More(); exp.Next() )
1297 if ( _MeshOfSolid* pm =
1298 _ViscousListener::GetSolidMesh( &theMesh, exp.Current(), /*toCreate=*/false))
1300 if ( toMakeN2NMap && !pm->_n2nMapComputed )
1301 if ( !builder.MakeN2NMap( pm ))
1302 return SMESH_ProxyMesh::Ptr();
1303 components.push_back( SMESH_ProxyMesh::Ptr( pm ));
1304 pm->myIsDeletable = false; // it will de deleted by boost::shared_ptr
1306 if ( pm->_warning && !pm->_warning->IsOK() )
1308 SMESH_subMesh* sm = theMesh.GetSubMesh( exp.Current() );
1309 SMESH_ComputeErrorPtr& smError = sm->GetComputeError();
1310 if ( !smError || smError->IsOK() )
1311 smError = pm->_warning;
1314 _ViscousListener::RemoveSolidMesh ( &theMesh, exp.Current() );
1316 switch ( components.size() )
1320 case 1: return components[0];
1322 default: return SMESH_ProxyMesh::Ptr( new SMESH_ProxyMesh( components ));
1324 return SMESH_ProxyMesh::Ptr();
1325 } // --------------------------------------------------------------------------------
1326 std::ostream & StdMeshers_ViscousLayers::SaveTo(std::ostream & save)
1328 save << " " << _nbLayers
1329 << " " << _thickness
1330 << " " << _stretchFactor
1331 << " " << _shapeIds.size();
1332 for ( size_t i = 0; i < _shapeIds.size(); ++i )
1333 save << " " << _shapeIds[i];
1334 save << " " << !_isToIgnoreShapes; // negate to keep the behavior in old studies.
1335 save << " " << _method;
1337 } // --------------------------------------------------------------------------------
1338 std::istream & StdMeshers_ViscousLayers::LoadFrom(std::istream & load)
1340 int nbFaces, faceID, shapeToTreat, method;
1341 load >> _nbLayers >> _thickness >> _stretchFactor >> nbFaces;
1342 while ( (int) _shapeIds.size() < nbFaces && load >> faceID )
1343 _shapeIds.push_back( faceID );
1344 if ( load >> shapeToTreat ) {
1345 _isToIgnoreShapes = !shapeToTreat;
1346 if ( load >> method )
1347 _method = (ExtrusionMethod) method;
1350 _isToIgnoreShapes = true; // old behavior
1353 } // --------------------------------------------------------------------------------
1354 bool StdMeshers_ViscousLayers::SetParametersByMesh(const SMESH_Mesh* theMesh,
1355 const TopoDS_Shape& theShape)
1359 } // --------------------------------------------------------------------------------
1360 SMESH_ComputeErrorPtr
1361 StdMeshers_ViscousLayers::CheckHypothesis(SMESH_Mesh& theMesh,
1362 const TopoDS_Shape& theShape,
1363 SMESH_Hypothesis::Hypothesis_Status& theStatus)
1365 VISCOUS_3D::_ViscousBuilder builder;
1366 SMESH_ComputeErrorPtr err = builder.CheckHypotheses( theMesh, theShape );
1367 if ( err && !err->IsOK() )
1368 theStatus = SMESH_Hypothesis::HYP_INCOMPAT_HYPS;
1370 theStatus = SMESH_Hypothesis::HYP_OK;
1374 // --------------------------------------------------------------------------------
1375 bool StdMeshers_ViscousLayers::IsShapeWithLayers(int shapeIndex) const
1378 ( std::find( _shapeIds.begin(), _shapeIds.end(), shapeIndex ) != _shapeIds.end() );
1379 return IsToIgnoreShapes() ? !isIn : isIn;
1381 // END StdMeshers_ViscousLayers hypothesis
1382 //================================================================================
1384 namespace VISCOUS_3D
1386 gp_XYZ getEdgeDir( const TopoDS_Edge& E, const TopoDS_Vertex& fromV )
1390 Handle(Geom_Curve) c = BRep_Tool::Curve( E, f, l );
1391 if ( c.IsNull() ) return gp_XYZ( Precision::Infinite(), 1e100, 1e100 );
1392 gp_Pnt p = BRep_Tool::Pnt( fromV );
1393 double distF = p.SquareDistance( c->Value( f ));
1394 double distL = p.SquareDistance( c->Value( l ));
1395 c->D1(( distF < distL ? f : l), p, dir );
1396 if ( distL < distF ) dir.Reverse();
1399 //--------------------------------------------------------------------------------
1400 gp_XYZ getEdgeDir( const TopoDS_Edge& E, const SMDS_MeshNode* atNode,
1401 SMESH_MesherHelper& helper)
1404 double f,l; gp_Pnt p;
1405 Handle(Geom_Curve) c = BRep_Tool::Curve( E, f, l );
1406 if ( c.IsNull() ) return gp_XYZ( Precision::Infinite(), 1e100, 1e100 );
1407 double u = helper.GetNodeU( E, atNode );
1411 //--------------------------------------------------------------------------------
1412 gp_XYZ getFaceDir( const TopoDS_Face& F, const TopoDS_Vertex& fromV,
1413 const SMDS_MeshNode* node, SMESH_MesherHelper& helper, bool& ok,
1415 //--------------------------------------------------------------------------------
1416 gp_XYZ getFaceDir( const TopoDS_Face& F, const TopoDS_Edge& fromE,
1417 const SMDS_MeshNode* node, SMESH_MesherHelper& helper, bool& ok)
1420 Handle(Geom_Curve) c = BRep_Tool::Curve( fromE, f, l );
1423 TopoDS_Vertex v = helper.IthVertex( 0, fromE );
1424 return getFaceDir( F, v, node, helper, ok );
1426 gp_XY uv = helper.GetNodeUV( F, node, 0, &ok );
1427 Handle(Geom_Surface) surface = BRep_Tool::Surface( F );
1428 gp_Pnt p; gp_Vec du, dv, norm;
1429 surface->D1( uv.X(),uv.Y(), p, du,dv );
1432 double u = helper.GetNodeU( fromE, node, 0, &ok );
1434 TopAbs_Orientation o = helper.GetSubShapeOri( F.Oriented(TopAbs_FORWARD), fromE);
1435 if ( o == TopAbs_REVERSED )
1438 gp_Vec dir = norm ^ du;
1440 if ( node->GetPosition()->GetTypeOfPosition() == SMDS_TOP_VERTEX &&
1441 helper.IsClosedEdge( fromE ))
1443 if ( fabs(u-f) < fabs(u-l)) c->D1( l, p, dv );
1444 else c->D1( f, p, dv );
1445 if ( o == TopAbs_REVERSED )
1447 gp_Vec dir2 = norm ^ dv;
1448 dir = dir.Normalized() + dir2.Normalized();
1452 //--------------------------------------------------------------------------------
1453 gp_XYZ getFaceDir( const TopoDS_Face& F, const TopoDS_Vertex& fromV,
1454 const SMDS_MeshNode* node, SMESH_MesherHelper& helper,
1455 bool& ok, double* cosin)
1457 TopoDS_Face faceFrw = F;
1458 faceFrw.Orientation( TopAbs_FORWARD );
1459 //double f,l; TopLoc_Location loc;
1460 TopoDS_Edge edges[2]; // sharing a vertex
1463 TopoDS_Vertex VV[2];
1464 TopExp_Explorer exp( faceFrw, TopAbs_EDGE );
1465 for ( ; exp.More() && nbEdges < 2; exp.Next() )
1467 const TopoDS_Edge& e = TopoDS::Edge( exp.Current() );
1468 if ( SMESH_Algo::isDegenerated( e )) continue;
1469 TopExp::Vertices( e, VV[0], VV[1], /*CumOri=*/true );
1470 if ( VV[1].IsSame( fromV )) {
1471 nbEdges += edges[ 0 ].IsNull();
1474 else if ( VV[0].IsSame( fromV )) {
1475 nbEdges += edges[ 1 ].IsNull();
1480 gp_XYZ dir(0,0,0), edgeDir[2];
1483 // get dirs of edges going fromV
1485 for ( size_t i = 0; i < nbEdges && ok; ++i )
1487 edgeDir[i] = getEdgeDir( edges[i], fromV );
1488 double size2 = edgeDir[i].SquareModulus();
1489 if (( ok = size2 > numeric_limits<double>::min() ))
1490 edgeDir[i] /= sqrt( size2 );
1492 if ( !ok ) return dir;
1494 // get angle between the 2 edges
1496 double angle = helper.GetAngle( edges[0], edges[1], faceFrw, fromV, &faceNormal );
1497 if ( Abs( angle ) < 5 * M_PI/180 )
1499 dir = ( faceNormal.XYZ() ^ edgeDir[0].Reversed()) + ( faceNormal.XYZ() ^ edgeDir[1] );
1503 dir = edgeDir[0] + edgeDir[1];
1508 double angle = gp_Vec( edgeDir[0] ).Angle( dir );
1509 *cosin = Cos( angle );
1512 else if ( nbEdges == 1 )
1514 dir = getFaceDir( faceFrw, edges[ edges[0].IsNull() ], node, helper, ok );
1515 if ( cosin ) *cosin = 1.;
1525 //================================================================================
1527 * \brief Finds concave VERTEXes of a FACE
1529 //================================================================================
1531 bool getConcaveVertices( const TopoDS_Face& F,
1532 SMESH_MesherHelper& helper,
1533 set< TGeomID >* vertices = 0)
1535 // check angles at VERTEXes
1537 TSideVector wires = StdMeshers_FaceSide::GetFaceWires( F, *helper.GetMesh(), 0, error );
1538 for ( size_t iW = 0; iW < wires.size(); ++iW )
1540 const int nbEdges = wires[iW]->NbEdges();
1541 if ( nbEdges < 2 && SMESH_Algo::isDegenerated( wires[iW]->Edge(0)))
1543 for ( int iE1 = 0; iE1 < nbEdges; ++iE1 )
1545 if ( SMESH_Algo::isDegenerated( wires[iW]->Edge( iE1 ))) continue;
1546 int iE2 = ( iE1 + 1 ) % nbEdges;
1547 while ( SMESH_Algo::isDegenerated( wires[iW]->Edge( iE2 )))
1548 iE2 = ( iE2 + 1 ) % nbEdges;
1549 TopoDS_Vertex V = wires[iW]->FirstVertex( iE2 );
1550 double angle = helper.GetAngle( wires[iW]->Edge( iE1 ),
1551 wires[iW]->Edge( iE2 ), F, V );
1552 if ( angle < -5. * M_PI / 180. )
1556 vertices->insert( helper.GetMeshDS()->ShapeToIndex( V ));
1560 return vertices ? !vertices->empty() : false;
1563 //================================================================================
1565 * \brief Returns true if a FACE is bound by a concave EDGE
1567 //================================================================================
1569 bool isConcave( const TopoDS_Face& F,
1570 SMESH_MesherHelper& helper,
1571 set< TGeomID >* vertices = 0 )
1573 bool isConcv = false;
1574 // if ( helper.Count( F, TopAbs_WIRE, /*useMap=*/false) > 1 )
1576 gp_Vec2d drv1, drv2;
1578 TopExp_Explorer eExp( F.Oriented( TopAbs_FORWARD ), TopAbs_EDGE );
1579 for ( ; eExp.More(); eExp.Next() )
1581 const TopoDS_Edge& E = TopoDS::Edge( eExp.Current() );
1582 if ( SMESH_Algo::isDegenerated( E )) continue;
1583 // check if 2D curve is concave
1584 BRepAdaptor_Curve2d curve( E, F );
1585 const int nbIntervals = curve.NbIntervals( GeomAbs_C2 );
1586 TColStd_Array1OfReal intervals(1, nbIntervals + 1 );
1587 curve.Intervals( intervals, GeomAbs_C2 );
1588 bool isConvex = true;
1589 for ( int i = 1; i <= nbIntervals && isConvex; ++i )
1591 double u1 = intervals( i );
1592 double u2 = intervals( i+1 );
1593 curve.D2( 0.5*( u1+u2 ), p, drv1, drv2 );
1594 double cross = drv1 ^ drv2;
1595 if ( E.Orientation() == TopAbs_REVERSED )
1597 isConvex = ( cross > -1e-9 ); // 0.1 );
1601 //cout << "Concave FACE " << helper.GetMeshDS()->ShapeToIndex( F ) << endl;
1610 // check angles at VERTEXes
1611 if ( getConcaveVertices( F, helper, vertices ))
1617 //================================================================================
1619 * \brief Computes minimal distance of face in-FACE nodes from an EDGE
1620 * \param [in] face - the mesh face to treat
1621 * \param [in] nodeOnEdge - a node on the EDGE
1622 * \param [out] faceSize - the computed distance
1623 * \return bool - true if faceSize computed
1625 //================================================================================
1627 bool getDistFromEdge( const SMDS_MeshElement* face,
1628 const SMDS_MeshNode* nodeOnEdge,
1631 faceSize = Precision::Infinite();
1634 int nbN = face->NbCornerNodes();
1635 int iOnE = face->GetNodeIndex( nodeOnEdge );
1636 int iNext[2] = { SMESH_MesherHelper::WrapIndex( iOnE+1, nbN ),
1637 SMESH_MesherHelper::WrapIndex( iOnE-1, nbN ) };
1638 const SMDS_MeshNode* nNext[2] = { face->GetNode( iNext[0] ),
1639 face->GetNode( iNext[1] ) };
1640 gp_XYZ segVec, segEnd = SMESH_TNodeXYZ( nodeOnEdge ); // segment on EDGE
1641 double segLen = -1.;
1642 // look for two neighbor not in-FACE nodes of face
1643 for ( int i = 0; i < 2; ++i )
1645 if (( nNext[i]->GetPosition()->GetDim() != 2 ) &&
1646 ( nodeOnEdge->GetPosition()->GetDim() == 0 || nNext[i]->GetID() < nodeOnEdge->GetID() ))
1648 // look for an in-FACE node
1649 for ( int iN = 0; iN < nbN; ++iN )
1651 if ( iN == iOnE || iN == iNext[i] )
1653 SMESH_TNodeXYZ pInFace = face->GetNode( iN );
1654 gp_XYZ v = pInFace - segEnd;
1657 segVec = SMESH_TNodeXYZ( nNext[i] ) - segEnd;
1658 segLen = segVec.Modulus();
1660 double distToSeg = v.Crossed( segVec ).Modulus() / segLen;
1661 faceSize = Min( faceSize, distToSeg );
1669 //================================================================================
1671 * \brief Return direction of axis or revolution of a surface
1673 //================================================================================
1675 bool getRovolutionAxis( const Adaptor3d_Surface& surface,
1678 switch ( surface.GetType() ) {
1681 gp_Cone cone = surface.Cone();
1682 axis = cone.Axis().Direction();
1685 case GeomAbs_Sphere:
1687 gp_Sphere sphere = surface.Sphere();
1688 axis = sphere.Position().Direction();
1691 case GeomAbs_SurfaceOfRevolution:
1693 axis = surface.AxeOfRevolution().Direction();
1696 //case GeomAbs_SurfaceOfExtrusion:
1697 case GeomAbs_OffsetSurface:
1699 Handle(Adaptor3d_HSurface) base = surface.BasisSurface();
1700 return getRovolutionAxis( base->Surface(), axis );
1702 default: return false;
1707 //--------------------------------------------------------------------------------
1708 // DEBUG. Dump intermediate node positions into a python script
1709 // HOWTO use: run python commands written in a console to see
1710 // construction steps of viscous layers
1716 PyDump(SMESH_Mesh& m) {
1717 int tag = 3 + m.GetId();
1718 const char* fname = "/tmp/viscous.py";
1719 cout << "execfile('"<<fname<<"')"<<endl;
1720 py = _pyStream = new ofstream(fname);
1721 *py << "import SMESH" << endl
1722 << "from salome.smesh import smeshBuilder" << endl
1723 << "smesh = smeshBuilder.New()" << endl
1724 << "meshSO = salome.myStudy.FindObjectID('0:1:2:" << tag <<"')" << endl
1725 << "mesh = smesh.Mesh( meshSO.GetObject() )"<<endl;
1730 *py << "mesh.GroupOnFilter(SMESH.VOLUME,'Viscous Prisms',"
1731 "smesh.GetFilter(SMESH.VOLUME,SMESH.FT_ElemGeomType,'=',SMESH.Geom_PENTA))"<<endl;
1732 *py << "mesh.GroupOnFilter(SMESH.VOLUME,'Neg Volumes',"
1733 "smesh.GetFilter(SMESH.VOLUME,SMESH.FT_Volume3D,'<',0))"<<endl;
1737 ~PyDump() { Finish(); cout << "NB FUNCTIONS: " << theNbPyFunc << endl; }
1738 struct MyStream : public ostream
1740 template <class T> ostream & operator<<( const T &anything ) { return *this ; }
1742 void Pause() { py = &_mystream; }
1743 void Resume() { py = _pyStream; }
1747 #define dumpFunction(f) { _dumpFunction(f, __LINE__);}
1748 #define dumpMove(n) { _dumpMove(n, __LINE__);}
1749 #define dumpMoveComm(n,txt) { _dumpMove(n, __LINE__, txt);}
1750 #define dumpCmd(txt) { _dumpCmd(txt, __LINE__);}
1751 void _dumpFunction(const string& fun, int ln)
1752 { if (py) *py<< "def "<<fun<<"(): # "<< ln <<endl; cout<<fun<<"()"<<endl; ++theNbPyFunc; }
1753 void _dumpMove(const SMDS_MeshNode* n, int ln, const char* txt="")
1754 { if (py) *py<< " mesh.MoveNode( "<<n->GetID()<< ", "<< n->X()
1755 << ", "<<n->Y()<<", "<< n->Z()<< ")\t\t # "<< ln <<" "<< txt << endl; }
1756 void _dumpCmd(const string& txt, int ln)
1757 { if (py) *py<< " "<<txt<<" # "<< ln <<endl; }
1758 void dumpFunctionEnd()
1759 { if (py) *py<< " return"<< endl; }
1760 void dumpChangeNodes( const SMDS_MeshElement* f )
1761 { if (py) { *py<< " mesh.ChangeElemNodes( " << f->GetID()<<", [";
1762 for ( int i=1; i < f->NbNodes(); ++i ) *py << f->GetNode(i-1)->GetID()<<", ";
1763 *py << f->GetNode( f->NbNodes()-1 )->GetID() << " ])"<< endl; }}
1764 #define debugMsg( txt ) { cout << "# "<< txt << " (line: " << __LINE__ << ")" << endl; }
1768 struct PyDump { PyDump(SMESH_Mesh&) {} void Finish() {} void Pause() {} void Resume() {} };
1769 #define dumpFunction(f) f
1771 #define dumpMoveComm(n,txt)
1772 #define dumpCmd(txt)
1773 #define dumpFunctionEnd()
1774 #define dumpChangeNodes(f) { if(f) {} } // prevent "unused variable 'f'" warning
1775 #define debugMsg( txt ) {}
1780 using namespace VISCOUS_3D;
1782 //================================================================================
1784 * \brief Constructor of _ViscousBuilder
1786 //================================================================================
1788 _ViscousBuilder::_ViscousBuilder()
1790 _error = SMESH_ComputeError::New(COMPERR_OK);
1794 //================================================================================
1796 * \brief Stores error description and returns false
1798 //================================================================================
1800 bool _ViscousBuilder::error(const string& text, int solidId )
1802 const string prefix = string("Viscous layers builder: ");
1803 _error->myName = COMPERR_ALGO_FAILED;
1804 _error->myComment = prefix + text;
1807 SMESH_subMesh* sm = _mesh->GetSubMeshContaining( solidId );
1808 if ( !sm && !_sdVec.empty() )
1809 sm = _mesh->GetSubMeshContaining( solidId = _sdVec[0]._index );
1810 if ( sm && sm->GetSubShape().ShapeType() == TopAbs_SOLID )
1812 SMESH_ComputeErrorPtr& smError = sm->GetComputeError();
1813 if ( smError && smError->myAlgo )
1814 _error->myAlgo = smError->myAlgo;
1816 sm->ComputeStateEngine( SMESH_subMesh::CHECK_COMPUTE_STATE );
1818 // set KO to all solids
1819 for ( size_t i = 0; i < _sdVec.size(); ++i )
1821 if ( _sdVec[i]._index == solidId )
1823 sm = _mesh->GetSubMesh( _sdVec[i]._solid );
1824 if ( !sm->IsEmpty() )
1826 SMESH_ComputeErrorPtr& smError = sm->GetComputeError();
1827 if ( !smError || smError->IsOK() )
1829 smError = SMESH_ComputeError::New( COMPERR_ALGO_FAILED, prefix + "failed");
1830 sm->ComputeStateEngine( SMESH_subMesh::CHECK_COMPUTE_STATE );
1834 makeGroupOfLE(); // debug
1839 //================================================================================
1841 * \brief At study restoration, restore event listeners used to clear an inferior
1842 * dim sub-mesh modified by viscous layers
1844 //================================================================================
1846 void _ViscousBuilder::RestoreListeners()
1851 //================================================================================
1853 * \brief computes SMESH_ProxyMesh::SubMesh::_n2n
1855 //================================================================================
1857 bool _ViscousBuilder::MakeN2NMap( _MeshOfSolid* pm )
1859 SMESH_subMesh* solidSM = pm->mySubMeshes.front();
1860 TopExp_Explorer fExp( solidSM->GetSubShape(), TopAbs_FACE );
1861 for ( ; fExp.More(); fExp.Next() )
1863 SMESHDS_SubMesh* srcSmDS = pm->GetMeshDS()->MeshElements( fExp.Current() );
1864 const SMESH_ProxyMesh::SubMesh* prxSmDS = pm->GetProxySubMesh( fExp.Current() );
1866 if ( !srcSmDS || !prxSmDS || !srcSmDS->NbElements() || !prxSmDS->NbElements() )
1868 if ( srcSmDS->GetElements()->next() == prxSmDS->GetElements()->next())
1871 if ( srcSmDS->NbElements() != prxSmDS->NbElements() )
1872 return error( "Different nb elements in a source and a proxy sub-mesh", solidSM->GetId());
1874 SMDS_ElemIteratorPtr srcIt = srcSmDS->GetElements();
1875 SMDS_ElemIteratorPtr prxIt = prxSmDS->GetElements();
1876 while( prxIt->more() )
1878 const SMDS_MeshElement* fSrc = srcIt->next();
1879 const SMDS_MeshElement* fPrx = prxIt->next();
1880 if ( fSrc->NbNodes() != fPrx->NbNodes())
1881 return error( "Different elements in a source and a proxy sub-mesh", solidSM->GetId());
1882 for ( int i = 0 ; i < fPrx->NbNodes(); ++i )
1883 pm->setNode2Node( fSrc->GetNode(i), fPrx->GetNode(i), prxSmDS );
1886 pm->_n2nMapComputed = true;
1890 //================================================================================
1892 * \brief Does its job
1894 //================================================================================
1896 SMESH_ComputeErrorPtr _ViscousBuilder::Compute(SMESH_Mesh& theMesh,
1897 const TopoDS_Shape& theShape)
1903 // check if proxy mesh already computed
1904 TopExp_Explorer exp( theShape, TopAbs_SOLID );
1906 return error("No SOLID's in theShape"), _error;
1908 if ( _ViscousListener::GetSolidMesh( _mesh, exp.Current(), /*toCreate=*/false))
1909 return SMESH_ComputeErrorPtr(); // everything already computed
1911 PyDump debugDump( theMesh );
1912 _pyDump = &debugDump;
1914 // TODO: ignore already computed SOLIDs
1915 if ( !findSolidsWithLayers())
1918 if ( !findFacesWithLayers() )
1921 // for ( size_t i = 0; i < _sdVec.size(); ++i )
1923 // if ( ! makeLayer( _sdVec[ i ])) // create _LayerEdge's
1929 findPeriodicFaces();
1931 for ( size_t i = 0; i < _sdVec.size(); ++i )
1934 for ( iSD = 0; iSD < _sdVec.size(); ++iSD ) // find next SOLID to compute
1935 if ( _sdVec[iSD]._before.IsEmpty() &&
1936 !_sdVec[iSD]._solid.IsNull() &&
1937 !_sdVec[iSD]._done )
1940 if ( ! makeLayer(_sdVec[iSD]) ) // create _LayerEdge's
1943 if ( _sdVec[iSD]._n2eMap.size() == 0 ) // no layers in a SOLID
1945 _sdVec[iSD]._solid.Nullify();
1949 if ( ! inflate(_sdVec[iSD]) ) // increase length of _LayerEdge's
1952 if ( ! refine(_sdVec[iSD]) ) // create nodes and prisms
1955 if ( ! shrink(_sdVec[iSD]) ) // shrink 2D mesh on FACEs w/o layer
1958 addBoundaryElements(_sdVec[iSD]); // create quadrangles on prism bare sides
1960 _sdVec[iSD]._done = true;
1962 const TopoDS_Shape& solid = _sdVec[iSD]._solid;
1963 for ( iSD = 0; iSD < _sdVec.size(); ++iSD )
1964 _sdVec[iSD]._before.Remove( solid );
1967 makeGroupOfLE(); // debug
1973 //================================================================================
1975 * \brief Check validity of hypotheses
1977 //================================================================================
1979 SMESH_ComputeErrorPtr _ViscousBuilder::CheckHypotheses( SMESH_Mesh& mesh,
1980 const TopoDS_Shape& shape )
1984 if ( _ViscousListener::GetSolidMesh( _mesh, shape, /*toCreate=*/false))
1985 return SMESH_ComputeErrorPtr(); // everything already computed
1988 findSolidsWithLayers();
1989 bool ok = findFacesWithLayers( true );
1991 // remove _MeshOfSolid's of _SolidData's
1992 for ( size_t i = 0; i < _sdVec.size(); ++i )
1993 _ViscousListener::RemoveSolidMesh( _mesh, _sdVec[i]._solid );
1998 return SMESH_ComputeErrorPtr();
2001 //================================================================================
2003 * \brief Finds SOLIDs to compute using viscous layers. Fills _sdVec
2005 //================================================================================
2007 bool _ViscousBuilder::findSolidsWithLayers()
2010 TopTools_IndexedMapOfShape allSolids;
2011 TopExp::MapShapes( _mesh->GetShapeToMesh(), TopAbs_SOLID, allSolids );
2012 _sdVec.reserve( allSolids.Extent());
2014 SMESH_HypoFilter filter;
2015 for ( int i = 1; i <= allSolids.Extent(); ++i )
2017 // find StdMeshers_ViscousLayers hyp assigned to the i-th solid
2018 SMESH_subMesh* sm = _mesh->GetSubMesh( allSolids(i) );
2019 if ( sm->GetSubMeshDS() && sm->GetSubMeshDS()->NbElements() > 0 )
2020 continue; // solid is already meshed
2021 SMESH_Algo* algo = sm->GetAlgo();
2022 if ( !algo ) continue;
2023 // TODO: check if algo is hidden
2024 const list <const SMESHDS_Hypothesis *> & allHyps =
2025 algo->GetUsedHypothesis(*_mesh, allSolids(i), /*ignoreAuxiliary=*/false);
2026 _SolidData* soData = 0;
2027 list< const SMESHDS_Hypothesis *>::const_iterator hyp = allHyps.begin();
2028 const StdMeshers_ViscousLayers* viscHyp = 0;
2029 for ( ; hyp != allHyps.end(); ++hyp )
2030 if (( viscHyp = dynamic_cast<const StdMeshers_ViscousLayers*>( *hyp )))
2032 TopoDS_Shape hypShape;
2033 filter.Init( filter.Is( viscHyp ));
2034 _mesh->GetHypothesis( allSolids(i), filter, true, &hypShape );
2038 _MeshOfSolid* proxyMesh = _ViscousListener::GetSolidMesh( _mesh,
2041 _sdVec.push_back( _SolidData( allSolids(i), proxyMesh ));
2042 soData = & _sdVec.back();
2043 soData->_index = getMeshDS()->ShapeToIndex( allSolids(i));
2044 soData->_helper = new SMESH_MesherHelper( *_mesh );
2045 soData->_helper->SetSubShape( allSolids(i) );
2046 _solids.Add( allSolids(i) );
2048 soData->_hyps.push_back( viscHyp );
2049 soData->_hypShapes.push_back( hypShape );
2052 if ( _sdVec.empty() )
2054 ( SMESH_Comment(StdMeshers_ViscousLayers::GetHypType()) << " hypothesis not found",0);
2059 //================================================================================
2061 * \brief Set a _SolidData to be computed before another
2063 //================================================================================
2065 bool _ViscousBuilder::setBefore( _SolidData& solidBefore, _SolidData& solidAfter )
2067 // check possibility to set this order; get all solids before solidBefore
2068 TopTools_IndexedMapOfShape allSolidsBefore;
2069 allSolidsBefore.Add( solidBefore._solid );
2070 for ( int i = 1; i <= allSolidsBefore.Extent(); ++i )
2072 int iSD = _solids.FindIndex( allSolidsBefore(i) );
2075 TopTools_MapIteratorOfMapOfShape soIt( _sdVec[ iSD-1 ]._before );
2076 for ( ; soIt.More(); soIt.Next() )
2077 allSolidsBefore.Add( soIt.Value() );
2080 if ( allSolidsBefore.Contains( solidAfter._solid ))
2083 for ( int i = 1; i <= allSolidsBefore.Extent(); ++i )
2084 solidAfter._before.Add( allSolidsBefore(i) );
2089 //================================================================================
2093 //================================================================================
2095 bool _ViscousBuilder::findFacesWithLayers(const bool onlyWith)
2097 SMESH_MesherHelper helper( *_mesh );
2098 TopExp_Explorer exp;
2100 // collect all faces-to-ignore defined by hyp
2101 for ( size_t i = 0; i < _sdVec.size(); ++i )
2103 // get faces-to-ignore defined by each hyp
2104 typedef const StdMeshers_ViscousLayers* THyp;
2105 typedef std::pair< set<TGeomID>, THyp > TFacesOfHyp;
2106 list< TFacesOfHyp > ignoreFacesOfHyps;
2107 list< THyp >::iterator hyp = _sdVec[i]._hyps.begin();
2108 list< TopoDS_Shape >::iterator hypShape = _sdVec[i]._hypShapes.begin();
2109 for ( ; hyp != _sdVec[i]._hyps.end(); ++hyp, ++hypShape )
2111 ignoreFacesOfHyps.push_back( TFacesOfHyp( set<TGeomID>(), *hyp ));
2112 getIgnoreFaces( _sdVec[i]._solid, *hyp, *hypShape, ignoreFacesOfHyps.back().first );
2115 // fill _SolidData::_face2hyp and check compatibility of hypotheses
2116 const int nbHyps = _sdVec[i]._hyps.size();
2119 // check if two hypotheses define different parameters for the same FACE
2120 list< TFacesOfHyp >::iterator igFacesOfHyp;
2121 for ( exp.Init( _sdVec[i]._solid, TopAbs_FACE ); exp.More(); exp.Next() )
2123 const TGeomID faceID = getMeshDS()->ShapeToIndex( exp.Current() );
2125 igFacesOfHyp = ignoreFacesOfHyps.begin();
2126 for ( ; igFacesOfHyp != ignoreFacesOfHyps.end(); ++igFacesOfHyp )
2127 if ( ! igFacesOfHyp->first.count( faceID ))
2130 return error(SMESH_Comment("Several hypotheses define "
2131 "Viscous Layers on the face #") << faceID );
2132 hyp = igFacesOfHyp->second;
2135 _sdVec[i]._face2hyp.insert( make_pair( faceID, hyp ));
2137 _sdVec[i]._ignoreFaceIds.insert( faceID );
2140 // check if two hypotheses define different number of viscous layers for
2141 // adjacent faces of a solid
2142 set< int > nbLayersSet;
2143 igFacesOfHyp = ignoreFacesOfHyps.begin();
2144 for ( ; igFacesOfHyp != ignoreFacesOfHyps.end(); ++igFacesOfHyp )
2146 nbLayersSet.insert( igFacesOfHyp->second->GetNumberLayers() );
2148 if ( nbLayersSet.size() > 1 )
2150 for ( exp.Init( _sdVec[i]._solid, TopAbs_EDGE ); exp.More(); exp.Next() )
2152 PShapeIteratorPtr fIt = helper.GetAncestors( exp.Current(), *_mesh, TopAbs_FACE );
2153 THyp hyp1 = 0, hyp2 = 0;
2154 while( const TopoDS_Shape* face = fIt->next() )
2156 const TGeomID faceID = getMeshDS()->ShapeToIndex( *face );
2157 map< TGeomID, THyp >::iterator f2h = _sdVec[i]._face2hyp.find( faceID );
2158 if ( f2h != _sdVec[i]._face2hyp.end() )
2160 ( hyp1 ? hyp2 : hyp1 ) = f2h->second;
2163 if ( hyp1 && hyp2 &&
2164 hyp1->GetNumberLayers() != hyp2->GetNumberLayers() )
2166 return error("Two hypotheses define different number of "
2167 "viscous layers on adjacent faces");
2171 } // if ( nbHyps > 1 )
2174 _sdVec[i]._ignoreFaceIds.swap( ignoreFacesOfHyps.back().first );
2178 if ( onlyWith ) // is called to check hypotheses compatibility only
2181 // fill _SolidData::_reversedFaceIds
2182 for ( size_t i = 0; i < _sdVec.size(); ++i )
2184 exp.Init( _sdVec[i]._solid.Oriented( TopAbs_FORWARD ), TopAbs_FACE );
2185 for ( ; exp.More(); exp.Next() )
2187 const TopoDS_Face& face = TopoDS::Face( exp.Current() );
2188 const TGeomID faceID = getMeshDS()->ShapeToIndex( face );
2189 if ( //!sdVec[i]._ignoreFaceIds.count( faceID ) &&
2190 helper.NbAncestors( face, *_mesh, TopAbs_SOLID ) > 1 &&
2191 helper.IsReversedSubMesh( face ))
2193 _sdVec[i]._reversedFaceIds.insert( faceID );
2198 // Find FACEs to shrink mesh on (solution 2 in issue 0020832): fill in _shrinkShape2Shape
2199 TopTools_IndexedMapOfShape shapes;
2200 std::string structAlgoName = "Hexa_3D";
2201 for ( size_t i = 0; i < _sdVec.size(); ++i )
2204 TopExp::MapShapes(_sdVec[i]._solid, TopAbs_EDGE, shapes);
2205 for ( int iE = 1; iE <= shapes.Extent(); ++iE )
2207 const TopoDS_Shape& edge = shapes(iE);
2208 // find 2 FACEs sharing an EDGE
2210 PShapeIteratorPtr fIt = helper.GetAncestors(edge, *_mesh, TopAbs_FACE, &_sdVec[i]._solid);
2211 while ( fIt->more())
2213 const TopoDS_Shape* f = fIt->next();
2214 FF[ int( !FF[0].IsNull()) ] = *f;
2216 if( FF[1].IsNull() ) continue; // seam edge can be shared by 1 FACE only
2218 // check presence of layers on them
2220 for ( int j = 0; j < 2; ++j )
2221 ignore[j] = _sdVec[i]._ignoreFaceIds.count( getMeshDS()->ShapeToIndex( FF[j] ));
2222 if ( ignore[0] == ignore[1] )
2223 continue; // nothing interesting
2224 TopoDS_Shape fWOL = FF[ ignore[0] ? 0 : 1 ]; // FACE w/o layers
2227 if ( !fWOL.IsNull())
2229 TGeomID edgeInd = getMeshDS()->ShapeToIndex( edge );
2230 _sdVec[i]._shrinkShape2Shape.insert( make_pair( edgeInd, fWOL ));
2235 // Find the SHAPE along which to inflate _LayerEdge based on VERTEX
2237 for ( size_t i = 0; i < _sdVec.size(); ++i )
2240 TopExp::MapShapes(_sdVec[i]._solid, TopAbs_VERTEX, shapes);
2241 for ( int iV = 1; iV <= shapes.Extent(); ++iV )
2243 const TopoDS_Shape& vertex = shapes(iV);
2244 // find faces WOL sharing the vertex
2245 vector< TopoDS_Shape > facesWOL;
2246 size_t totalNbFaces = 0;
2247 PShapeIteratorPtr fIt = helper.GetAncestors(vertex, *_mesh, TopAbs_FACE, &_sdVec[i]._solid );
2248 while ( fIt->more())
2250 const TopoDS_Shape* f = fIt->next();
2252 const int fID = getMeshDS()->ShapeToIndex( *f );
2253 if ( _sdVec[i]._ignoreFaceIds.count ( fID ) /*&& !_sdVec[i]._noShrinkShapes.count( fID )*/)
2254 facesWOL.push_back( *f );
2256 if ( facesWOL.size() == totalNbFaces || facesWOL.empty() )
2257 continue; // no layers at this vertex or no WOL
2258 TGeomID vInd = getMeshDS()->ShapeToIndex( vertex );
2259 switch ( facesWOL.size() )
2263 helper.SetSubShape( facesWOL[0] );
2264 if ( helper.IsRealSeam( vInd )) // inflate along a seam edge?
2266 TopoDS_Shape seamEdge;
2267 PShapeIteratorPtr eIt = helper.GetAncestors(vertex, *_mesh, TopAbs_EDGE);
2268 while ( eIt->more() && seamEdge.IsNull() )
2270 const TopoDS_Shape* e = eIt->next();
2271 if ( helper.IsRealSeam( *e ) )
2274 if ( !seamEdge.IsNull() )
2276 _sdVec[i]._shrinkShape2Shape.insert( make_pair( vInd, seamEdge ));
2280 _sdVec[i]._shrinkShape2Shape.insert( make_pair( vInd, facesWOL[0] ));
2285 // find an edge shared by 2 faces
2286 PShapeIteratorPtr eIt = helper.GetAncestors(vertex, *_mesh, TopAbs_EDGE);
2287 while ( eIt->more())
2289 const TopoDS_Shape* e = eIt->next();
2290 if ( helper.IsSubShape( *e, facesWOL[0]) &&
2291 helper.IsSubShape( *e, facesWOL[1]))
2293 _sdVec[i]._shrinkShape2Shape.insert( make_pair( vInd, *e )); break;
2299 return error("Not yet supported case", _sdVec[i]._index);
2304 // Add to _noShrinkShapes sub-shapes of FACE's that can't be shrunk since
2305 // the algo of the SOLID sharing the FACE does not support it or for other reasons
2306 set< string > notSupportAlgos; notSupportAlgos.insert( structAlgoName );
2307 for ( size_t i = 0; i < _sdVec.size(); ++i )
2309 map< TGeomID, TopoDS_Shape >::iterator e2f = _sdVec[i]._shrinkShape2Shape.begin();
2310 for ( ; e2f != _sdVec[i]._shrinkShape2Shape.end(); ++e2f )
2312 const TopoDS_Shape& fWOL = e2f->second;
2313 const TGeomID edgeID = e2f->first;
2314 TGeomID faceID = getMeshDS()->ShapeToIndex( fWOL );
2315 TopoDS_Shape edge = getMeshDS()->IndexToShape( edgeID );
2316 if ( edge.ShapeType() != TopAbs_EDGE )
2317 continue; // shrink shape is VERTEX
2320 PShapeIteratorPtr soIt = helper.GetAncestors(fWOL, *_mesh, TopAbs_SOLID);
2321 while ( soIt->more() && solid.IsNull() )
2323 const TopoDS_Shape* so = soIt->next();
2324 if ( !so->IsSame( _sdVec[i]._solid ))
2327 if ( solid.IsNull() )
2330 bool noShrinkE = false;
2331 SMESH_Algo* algo = _mesh->GetSubMesh( solid )->GetAlgo();
2332 bool isStructured = ( algo && algo->GetName() == structAlgoName );
2333 size_t iSolid = _solids.FindIndex( solid ) - 1;
2334 if ( iSolid < _sdVec.size() && _sdVec[ iSolid ]._ignoreFaceIds.count( faceID ))
2336 // the adjacent SOLID has NO layers on fWOL;
2337 // shrink allowed if
2338 // - there are layers on the EDGE in the adjacent SOLID
2339 // - there are NO layers in the adjacent SOLID && algo is unstructured and computed later
2340 bool hasWLAdj = (_sdVec[iSolid]._shrinkShape2Shape.count( edgeID ));
2341 bool shrinkAllowed = (( hasWLAdj ) ||
2342 ( !isStructured && setBefore( _sdVec[ i ], _sdVec[ iSolid ] )));
2343 noShrinkE = !shrinkAllowed;
2345 else if ( iSolid < _sdVec.size() )
2347 // the adjacent SOLID has layers on fWOL;
2348 // check if SOLID's mesh is unstructured and then try to set it
2349 // to be computed after the i-th solid
2350 if ( isStructured || !setBefore( _sdVec[ i ], _sdVec[ iSolid ] ))
2351 noShrinkE = true; // don't shrink fWOL
2355 // the adjacent SOLID has NO layers at all
2356 noShrinkE = isStructured;
2361 _sdVec[i]._noShrinkShapes.insert( edgeID );
2363 // check if there is a collision with to-shrink-from EDGEs in iSolid
2364 // if ( iSolid < _sdVec.size() )
2367 // TopExp::MapShapes( fWOL, TopAbs_EDGE, shapes);
2368 // for ( int iE = 1; iE <= shapes.Extent(); ++iE )
2370 // const TopoDS_Edge& E = TopoDS::Edge( shapes( iE ));
2371 // const TGeomID eID = getMeshDS()->ShapeToIndex( E );
2372 // if ( eID == edgeID ||
2373 // !_sdVec[iSolid]._shrinkShape2Shape.count( eID ) ||
2374 // _sdVec[i]._noShrinkShapes.count( eID ))
2376 // for ( int is1st = 0; is1st < 2; ++is1st )
2378 // TopoDS_Vertex V = helper.IthVertex( is1st, E );
2379 // if ( _sdVec[i]._noShrinkShapes.count( getMeshDS()->ShapeToIndex( V ) ))
2381 // return error("No way to make a conformal mesh with "
2382 // "the given set of faces with layers", _sdVec[i]._index);
2389 // add VERTEXes of the edge in _noShrinkShapes, which is necessary if
2390 // _shrinkShape2Shape is different in the adjacent SOLID
2391 for ( TopoDS_Iterator vIt( edge ); vIt.More(); vIt.Next() )
2393 TGeomID vID = getMeshDS()->ShapeToIndex( vIt.Value() );
2394 bool noShrinkV = false, noShrinkIfAdjMeshed = false;
2396 if ( iSolid < _sdVec.size() )
2398 if ( _sdVec[ iSolid ]._ignoreFaceIds.count( faceID ))
2400 map< TGeomID, TopoDS_Shape >::iterator i2S, i2SAdj;
2401 i2S = _sdVec[i ]._shrinkShape2Shape.find( vID );
2402 i2SAdj = _sdVec[iSolid]._shrinkShape2Shape.find( vID );
2403 if ( i2SAdj == _sdVec[iSolid]._shrinkShape2Shape.end() )
2404 noShrinkV = (( isStructured ) ||
2405 ( noShrinkIfAdjMeshed = i2S->second.ShapeType() == TopAbs_EDGE ));
2407 noShrinkV = ( ! i2S->second.IsSame( i2SAdj->second ));
2411 noShrinkV = noShrinkE;
2416 // the adjacent SOLID has NO layers at all
2423 noShrinkV = noShrinkIfAdjMeshed =
2424 ( _sdVec[i]._shrinkShape2Shape[ vID ].ShapeType() == TopAbs_EDGE );
2428 if ( noShrinkV && noShrinkIfAdjMeshed )
2430 // noShrinkV if FACEs in the adjacent SOLID are meshed
2431 PShapeIteratorPtr fIt = helper.GetAncestors( _sdVec[i]._shrinkShape2Shape[ vID ],
2432 *_mesh, TopAbs_FACE, &solid );
2433 while ( fIt->more() )
2435 const TopoDS_Shape* f = fIt->next();
2436 if ( !f->IsSame( fWOL ))
2438 noShrinkV = ! _mesh->GetSubMesh( *f )->IsEmpty();
2444 _sdVec[i]._noShrinkShapes.insert( vID );
2447 } // loop on _sdVec[i]._shrinkShape2Shape
2448 } // loop on _sdVec to fill in _SolidData::_noShrinkShapes
2451 // add FACEs of other SOLIDs to _ignoreFaceIds
2452 for ( size_t i = 0; i < _sdVec.size(); ++i )
2455 TopExp::MapShapes(_sdVec[i]._solid, TopAbs_FACE, shapes);
2457 for ( exp.Init( _mesh->GetShapeToMesh(), TopAbs_FACE ); exp.More(); exp.Next() )
2459 if ( !shapes.Contains( exp.Current() ))
2460 _sdVec[i]._ignoreFaceIds.insert( getMeshDS()->ShapeToIndex( exp.Current() ));
2467 //================================================================================
2469 * \brief Finds FACEs w/o layers for a given SOLID by an hypothesis
2471 //================================================================================
2473 void _ViscousBuilder::getIgnoreFaces(const TopoDS_Shape& solid,
2474 const StdMeshers_ViscousLayers* hyp,
2475 const TopoDS_Shape& hypShape,
2476 set<TGeomID>& ignoreFaceIds)
2478 TopExp_Explorer exp;
2480 vector<TGeomID> ids = hyp->GetBndShapes();
2481 if ( hyp->IsToIgnoreShapes() ) // FACEs to ignore are given
2483 for ( size_t ii = 0; ii < ids.size(); ++ii )
2485 const TopoDS_Shape& s = getMeshDS()->IndexToShape( ids[ii] );
2486 if ( !s.IsNull() && s.ShapeType() == TopAbs_FACE )
2487 ignoreFaceIds.insert( ids[ii] );
2490 else // FACEs with layers are given
2492 exp.Init( solid, TopAbs_FACE );
2493 for ( ; exp.More(); exp.Next() )
2495 TGeomID faceInd = getMeshDS()->ShapeToIndex( exp.Current() );
2496 if ( find( ids.begin(), ids.end(), faceInd ) == ids.end() )
2497 ignoreFaceIds.insert( faceInd );
2501 // ignore internal FACEs if inlets and outlets are specified
2502 if ( hyp->IsToIgnoreShapes() )
2504 TopTools_IndexedDataMapOfShapeListOfShape solidsOfFace;
2505 TopExp::MapShapesAndAncestors( hypShape,
2506 TopAbs_FACE, TopAbs_SOLID, solidsOfFace);
2508 for ( exp.Init( solid, TopAbs_FACE ); exp.More(); exp.Next() )
2510 const TopoDS_Face& face = TopoDS::Face( exp.Current() );
2511 if ( SMESH_MesherHelper::NbAncestors( face, *_mesh, TopAbs_SOLID ) < 2 )
2514 int nbSolids = solidsOfFace.FindFromKey( face ).Extent();
2516 ignoreFaceIds.insert( getMeshDS()->ShapeToIndex( face ));
2521 //================================================================================
2523 * \brief Create the inner surface of the viscous layer and prepare data for infation
2525 //================================================================================
2527 bool _ViscousBuilder::makeLayer(_SolidData& data)
2529 // make a map to find new nodes on sub-shapes shared with other SOLID
2530 map< TGeomID, TNode2Edge* >::iterator s2ne;
2531 map< TGeomID, TopoDS_Shape >::iterator s2s = data._shrinkShape2Shape.begin();
2532 for (; s2s != data._shrinkShape2Shape.end(); ++s2s )
2534 TGeomID shapeInd = s2s->first;
2535 for ( size_t i = 0; i < _sdVec.size(); ++i )
2537 if ( _sdVec[i]._index == data._index ) continue;
2538 map< TGeomID, TopoDS_Shape >::iterator s2s2 = _sdVec[i]._shrinkShape2Shape.find( shapeInd );
2539 if ( s2s2 != _sdVec[i]._shrinkShape2Shape.end() &&
2540 *s2s == *s2s2 && !_sdVec[i]._n2eMap.empty() )
2542 data._s2neMap.insert( make_pair( shapeInd, &_sdVec[i]._n2eMap ));
2548 // Create temporary faces and _LayerEdge's
2550 dumpFunction(SMESH_Comment("makeLayers_")<<data._index);
2552 vector< _EdgesOnShape >& edgesByGeom = data._edgesOnShape;
2554 data._stepSize = Precision::Infinite();
2555 data._stepSizeNodes[0] = 0;
2557 SMESH_MesherHelper helper( *_mesh );
2558 helper.SetSubShape( data._solid );
2559 helper.SetElementsOnShape( true );
2561 vector< const SMDS_MeshNode*> newNodes; // of a mesh face
2562 TNode2Edge::iterator n2e2;
2564 // make _LayerEdge's
2565 for ( TopExp_Explorer exp( data._solid, TopAbs_FACE ); exp.More(); exp.Next() )
2567 const TopoDS_Face& F = TopoDS::Face( exp.Current() );
2568 SMESH_subMesh* sm = _mesh->GetSubMesh( F );
2569 const TGeomID id = sm->GetId();
2570 if ( edgesByGeom[ id ]._shape.IsNull() )
2571 continue; // no layers
2572 SMESH_ProxyMesh::SubMesh* proxySub =
2573 data._proxyMesh->getFaceSubM( F, /*create=*/true);
2575 SMESHDS_SubMesh* smDS = sm->GetSubMeshDS();
2576 if ( !smDS ) return error(SMESH_Comment("Not meshed face ") << id, data._index );
2578 SMDS_ElemIteratorPtr eIt = smDS->GetElements();
2579 while ( eIt->more() )
2581 const SMDS_MeshElement* face = eIt->next();
2582 double faceMaxCosin = -1;
2583 _LayerEdge* maxCosinEdge = 0;
2584 int nbDegenNodes = 0;
2586 newNodes.resize( face->NbCornerNodes() );
2587 for ( size_t i = 0 ; i < newNodes.size(); ++i )
2589 const SMDS_MeshNode* n = face->GetNode( i );
2590 const int shapeID = n->getshapeId();
2591 const bool onDegenShap = helper.IsDegenShape( shapeID );
2592 const bool onDegenEdge = ( onDegenShap && n->GetPosition()->GetDim() == 1 );
2597 // substitute n on a degenerated EDGE with a node on a corresponding VERTEX
2598 const TopoDS_Shape& E = getMeshDS()->IndexToShape( shapeID );
2599 TopoDS_Vertex V = helper.IthVertex( 0, TopoDS::Edge( E ));
2600 if ( const SMDS_MeshNode* vN = SMESH_Algo::VertexNode( V, getMeshDS() )) {
2610 TNode2Edge::iterator n2e = data._n2eMap.insert( make_pair( n, (_LayerEdge*)0 )).first;
2611 if ( !(*n2e).second )
2614 _LayerEdge* edge = _Factory::NewLayerEdge();
2615 edge->_nodes.push_back( n );
2617 edgesByGeom[ shapeID ]._edges.push_back( edge );
2618 const bool noShrink = data._noShrinkShapes.count( shapeID );
2620 SMESH_TNodeXYZ xyz( n );
2622 // set edge data or find already refined _LayerEdge and get data from it
2623 if (( !noShrink ) &&
2624 ( n->GetPosition()->GetTypeOfPosition() != SMDS_TOP_FACE ) &&
2625 (( s2ne = data._s2neMap.find( shapeID )) != data._s2neMap.end() ) &&
2626 (( n2e2 = (*s2ne).second->find( n )) != s2ne->second->end() ))
2628 _LayerEdge* foundEdge = (*n2e2).second;
2629 gp_XYZ lastPos = edge->Copy( *foundEdge, edgesByGeom[ shapeID ], helper );
2630 foundEdge->_pos.push_back( lastPos );
2631 // location of the last node is modified and we restore it by foundEdge->_pos.back()
2632 const_cast< SMDS_MeshNode* >
2633 ( edge->_nodes.back() )->setXYZ( xyz.X(), xyz.Y(), xyz.Z() );
2639 edge->_nodes.push_back( helper.AddNode( xyz.X(), xyz.Y(), xyz.Z() ));
2641 if ( !setEdgeData( *edge, edgesByGeom[ shapeID ], helper, data ))
2644 if ( edge->_nodes.size() < 2 )
2645 edge->Block( data );
2646 //data._noShrinkShapes.insert( shapeID );
2648 dumpMove(edge->_nodes.back());
2650 if ( edge->_cosin > faceMaxCosin )
2652 faceMaxCosin = edge->_cosin;
2653 maxCosinEdge = edge;
2656 newNodes[ i ] = n2e->second->_nodes.back();
2659 data._n2eMap.insert( make_pair( face->GetNode( i ), n2e->second ));
2661 if ( newNodes.size() - nbDegenNodes < 2 )
2664 // create a temporary face
2665 const SMDS_MeshElement* newFace =
2666 new _TmpMeshFace( newNodes, --_tmpFaceID, face->GetShapeID(), face );
2667 proxySub->AddElement( newFace );
2669 // compute inflation step size by min size of element on a convex surface
2670 if ( faceMaxCosin > theMinSmoothCosin )
2671 limitStepSize( data, face, maxCosinEdge );
2673 } // loop on 2D elements on a FACE
2674 } // loop on FACEs of a SOLID to create _LayerEdge's
2677 // Set _LayerEdge::_neibors
2678 TNode2Edge::iterator n2e;
2679 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
2681 _EdgesOnShape& eos = data._edgesOnShape[iS];
2682 for ( size_t i = 0; i < eos._edges.size(); ++i )
2684 _LayerEdge* edge = eos._edges[i];
2685 TIDSortedNodeSet nearNodes;
2686 SMDS_ElemIteratorPtr fIt = edge->_nodes[0]->GetInverseElementIterator(SMDSAbs_Face);
2687 while ( fIt->more() )
2689 const SMDS_MeshElement* f = fIt->next();
2690 if ( !data._ignoreFaceIds.count( f->getshapeId() ))
2691 nearNodes.insert( f->begin_nodes(), f->end_nodes() );
2693 nearNodes.erase( edge->_nodes[0] );
2694 edge->_neibors.reserve( nearNodes.size() );
2695 TIDSortedNodeSet::iterator node = nearNodes.begin();
2696 for ( ; node != nearNodes.end(); ++node )
2697 if (( n2e = data._n2eMap.find( *node )) != data._n2eMap.end() )
2698 edge->_neibors.push_back( n2e->second );
2702 data._epsilon = 1e-7;
2703 if ( data._stepSize < 1. )
2704 data._epsilon *= data._stepSize;
2706 if ( !findShapesToSmooth( data )) // _LayerEdge::_maxLen is computed here
2709 // limit data._stepSize depending on surface curvature and fill data._convexFaces
2710 limitStepSizeByCurvature( data ); // !!! it must be before node substitution in _Simplex
2712 // Set target nodes into _Simplex and _LayerEdge's to _2NearEdges
2713 const SMDS_MeshNode* nn[2];
2714 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
2716 _EdgesOnShape& eos = data._edgesOnShape[iS];
2717 for ( size_t i = 0; i < eos._edges.size(); ++i )
2719 _LayerEdge* edge = eos._edges[i];
2720 if ( edge->IsOnEdge() )
2722 // get neighbor nodes
2723 bool hasData = ( edge->_2neibors->_edges[0] );
2724 if ( hasData ) // _LayerEdge is a copy of another one
2726 nn[0] = edge->_2neibors->srcNode(0);
2727 nn[1] = edge->_2neibors->srcNode(1);
2729 else if ( !findNeiborsOnEdge( edge, nn[0],nn[1], eos, data ))
2733 // set neighbor _LayerEdge's
2734 for ( int j = 0; j < 2; ++j )
2736 if (( n2e = data._n2eMap.find( nn[j] )) == data._n2eMap.end() )
2737 return error("_LayerEdge not found by src node", data._index);
2738 edge->_2neibors->_edges[j] = n2e->second;
2741 edge->SetDataByNeighbors( nn[0], nn[1], eos, helper );
2744 for ( size_t j = 0; j < edge->_simplices.size(); ++j )
2746 _Simplex& s = edge->_simplices[j];
2747 s._nNext = data._n2eMap[ s._nNext ]->_nodes.back();
2748 s._nPrev = data._n2eMap[ s._nPrev ]->_nodes.back();
2751 // For an _LayerEdge on a degenerated EDGE, copy some data from
2752 // a corresponding _LayerEdge on a VERTEX
2753 // (issue 52453, pb on a downloaded SampleCase2-Tet-netgen-mephisto.hdf)
2754 if ( helper.IsDegenShape( edge->_nodes[0]->getshapeId() ))
2756 // Generally we should not get here
2757 if ( eos.ShapeType() != TopAbs_EDGE )
2759 TopoDS_Vertex V = helper.IthVertex( 0, TopoDS::Edge( eos._shape ));
2760 const SMDS_MeshNode* vN = SMESH_Algo::VertexNode( V, getMeshDS() );
2761 if (( n2e = data._n2eMap.find( vN )) == data._n2eMap.end() )
2763 const _LayerEdge* vEdge = n2e->second;
2764 edge->_normal = vEdge->_normal;
2765 edge->_lenFactor = vEdge->_lenFactor;
2766 edge->_cosin = vEdge->_cosin;
2769 } // loop on data._edgesOnShape._edges
2770 } // loop on data._edgesOnShape
2772 // fix _LayerEdge::_2neibors on EDGEs to smooth
2773 // map< TGeomID,Handle(Geom_Curve)>::iterator e2c = data._edge2curve.begin();
2774 // for ( ; e2c != data._edge2curve.end(); ++e2c )
2775 // if ( !e2c->second.IsNull() )
2777 // if ( _EdgesOnShape* eos = data.GetShapeEdges( e2c->first ))
2778 // data.Sort2NeiborsOnEdge( eos->_edges );
2785 //================================================================================
2787 * \brief Compute inflation step size by min size of element on a convex surface
2789 //================================================================================
2791 void _ViscousBuilder::limitStepSize( _SolidData& data,
2792 const SMDS_MeshElement* face,
2793 const _LayerEdge* maxCosinEdge )
2796 double minSize = 10 * data._stepSize;
2797 const int nbNodes = face->NbCornerNodes();
2798 for ( int i = 0; i < nbNodes; ++i )
2800 const SMDS_MeshNode* nextN = face->GetNode( SMESH_MesherHelper::WrapIndex( i+1, nbNodes ));
2801 const SMDS_MeshNode* curN = face->GetNode( i );
2802 if ( nextN->GetPosition()->GetTypeOfPosition() == SMDS_TOP_FACE ||
2803 curN-> GetPosition()->GetTypeOfPosition() == SMDS_TOP_FACE )
2805 double dist = SMESH_TNodeXYZ( curN ).Distance( nextN );
2806 if ( dist < minSize )
2807 minSize = dist, iN = i;
2810 double newStep = 0.8 * minSize / maxCosinEdge->_lenFactor;
2811 if ( newStep < data._stepSize )
2813 data._stepSize = newStep;
2814 data._stepSizeCoeff = 0.8 / maxCosinEdge->_lenFactor;
2815 data._stepSizeNodes[0] = face->GetNode( iN );
2816 data._stepSizeNodes[1] = face->GetNode( SMESH_MesherHelper::WrapIndex( iN+1, nbNodes ));
2820 //================================================================================
2822 * \brief Compute inflation step size by min size of element on a convex surface
2824 //================================================================================
2826 void _ViscousBuilder::limitStepSize( _SolidData& data, const double minSize )
2828 if ( minSize < data._stepSize )
2830 data._stepSize = minSize;
2831 if ( data._stepSizeNodes[0] )
2834 SMESH_TNodeXYZ(data._stepSizeNodes[0]).Distance(data._stepSizeNodes[1]);
2835 data._stepSizeCoeff = data._stepSize / dist;
2840 //================================================================================
2842 * \brief Limit data._stepSize by evaluating curvature of shapes and fill data._convexFaces
2844 //================================================================================
2846 void _ViscousBuilder::limitStepSizeByCurvature( _SolidData& data )
2848 SMESH_MesherHelper helper( *_mesh );
2850 BRepLProp_SLProps surfProp( 2, 1e-6 );
2851 data._convexFaces.clear();
2853 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
2855 _EdgesOnShape& eof = data._edgesOnShape[iS];
2856 if ( eof.ShapeType() != TopAbs_FACE ||
2857 data._ignoreFaceIds.count( eof._shapeID ))
2860 TopoDS_Face F = TopoDS::Face( eof._shape );
2861 const TGeomID faceID = eof._shapeID;
2863 BRepAdaptor_Surface surface( F, false );
2864 surfProp.SetSurface( surface );
2866 _ConvexFace cnvFace;
2868 cnvFace._normalsFixed = false;
2869 cnvFace._isTooCurved = false;
2871 double maxCurvature = cnvFace.GetMaxCurvature( data, eof, surfProp, helper );
2872 if ( maxCurvature > 0 )
2874 limitStepSize( data, 0.9 / maxCurvature );
2875 findEdgesToUpdateNormalNearConvexFace( cnvFace, data, helper );
2877 if ( !cnvFace._isTooCurved ) continue;
2879 _ConvexFace & convFace =
2880 data._convexFaces.insert( make_pair( faceID, cnvFace )).first->second;
2882 // skip a closed surface (data._convexFaces is useful anyway)
2883 bool isClosedF = false;
2884 helper.SetSubShape( F );
2885 if ( helper.HasRealSeam() )
2887 // in the closed surface there must be a closed EDGE
2888 for ( TopExp_Explorer eIt( F, TopAbs_EDGE ); eIt.More() && !isClosedF; eIt.Next() )
2889 isClosedF = helper.IsClosedEdge( TopoDS::Edge( eIt.Current() ));
2893 // limit _LayerEdge::_maxLen on the FACE
2894 const double oriFactor = ( F.Orientation() == TopAbs_REVERSED ? +1. : -1. );
2895 const double minCurvature =
2896 1. / ( eof._hyp.GetTotalThickness() * ( 1 + theThickToIntersection ));
2897 map< TGeomID, _EdgesOnShape* >::iterator id2eos = cnvFace._subIdToEOS.find( faceID );
2898 if ( id2eos != cnvFace._subIdToEOS.end() )
2900 _EdgesOnShape& eos = * id2eos->second;
2901 for ( size_t i = 0; i < eos._edges.size(); ++i )
2903 _LayerEdge* ledge = eos._edges[ i ];
2904 gp_XY uv = helper.GetNodeUV( F, ledge->_nodes[0] );
2905 surfProp.SetParameters( uv.X(), uv.Y() );
2906 if ( surfProp.IsCurvatureDefined() )
2908 double curvature = Max( surfProp.MaxCurvature() * oriFactor,
2909 surfProp.MinCurvature() * oriFactor );
2910 if ( curvature > minCurvature )
2911 ledge->SetMaxLen( Min( ledge->_maxLen, 1. / curvature ));
2918 // Fill _ConvexFace::_simplexTestEdges. These _LayerEdge's are used to detect
2919 // prism distortion.
2920 map< TGeomID, _EdgesOnShape* >::iterator id2eos = convFace._subIdToEOS.find( faceID );
2921 if ( id2eos != convFace._subIdToEOS.end() && !id2eos->second->_edges.empty() )
2923 // there are _LayerEdge's on the FACE it-self;
2924 // select _LayerEdge's near EDGEs
2925 _EdgesOnShape& eos = * id2eos->second;
2926 for ( size_t i = 0; i < eos._edges.size(); ++i )
2928 _LayerEdge* ledge = eos._edges[ i ];
2929 for ( size_t j = 0; j < ledge->_simplices.size(); ++j )
2930 if ( ledge->_simplices[j]._nNext->GetPosition()->GetDim() < 2 )
2932 // do not select _LayerEdge's neighboring sharp EDGEs
2933 bool sharpNbr = false;
2934 for ( size_t iN = 0; iN < ledge->_neibors.size() && !sharpNbr; ++iN )
2935 sharpNbr = ( ledge->_neibors[iN]->_cosin > theMinSmoothCosin );
2937 convFace._simplexTestEdges.push_back( ledge );
2944 // where there are no _LayerEdge's on a _ConvexFace,
2945 // as e.g. on a fillet surface with no internal nodes - issue 22580,
2946 // so that collision of viscous internal faces is not detected by check of
2947 // intersection of _LayerEdge's with the viscous internal faces.
2949 set< const SMDS_MeshNode* > usedNodes;
2951 // look for _LayerEdge's with null _sWOL
2952 id2eos = convFace._subIdToEOS.begin();
2953 for ( ; id2eos != convFace._subIdToEOS.end(); ++id2eos )
2955 _EdgesOnShape& eos = * id2eos->second;
2956 if ( !eos._sWOL.IsNull() )
2958 for ( size_t i = 0; i < eos._edges.size(); ++i )
2960 _LayerEdge* ledge = eos._edges[ i ];
2961 const SMDS_MeshNode* srcNode = ledge->_nodes[0];
2962 if ( !usedNodes.insert( srcNode ).second ) continue;
2964 for ( size_t i = 0; i < ledge->_simplices.size(); ++i )
2966 usedNodes.insert( ledge->_simplices[i]._nPrev );
2967 usedNodes.insert( ledge->_simplices[i]._nNext );
2969 convFace._simplexTestEdges.push_back( ledge );
2973 } // loop on FACEs of data._solid
2976 //================================================================================
2978 * \brief Detect shapes (and _LayerEdge's on them) to smooth
2980 //================================================================================
2982 bool _ViscousBuilder::findShapesToSmooth( _SolidData& data )
2984 // define allowed thickness
2985 computeGeomSize( data ); // compute data._geomSize and _LayerEdge::_maxLen
2988 // Find shapes needing smoothing; such a shape has _LayerEdge._normal on it's
2989 // boundary inclined to the shape at a sharp angle
2991 TopTools_MapOfShape edgesOfSmooFaces;
2992 SMESH_MesherHelper helper( *_mesh );
2995 vector< _EdgesOnShape >& edgesByGeom = data._edgesOnShape;
2996 data._nbShapesToSmooth = 0;
2998 for ( size_t iS = 0; iS < edgesByGeom.size(); ++iS ) // check FACEs
3000 _EdgesOnShape& eos = edgesByGeom[iS];
3001 eos._toSmooth = false;
3002 if ( eos._edges.empty() || eos.ShapeType() != TopAbs_FACE )
3005 double tgtThick = eos._hyp.GetTotalThickness();
3006 SMESH_subMeshIteratorPtr subIt = eos._subMesh->getDependsOnIterator(/*includeSelf=*/false );
3007 while ( subIt->more() && !eos._toSmooth )
3009 TGeomID iSub = subIt->next()->GetId();
3010 const vector<_LayerEdge*>& eSub = edgesByGeom[ iSub ]._edges;
3011 if ( eSub.empty() ) continue;
3014 for ( size_t i = 0; i < eSub.size() && !eos._toSmooth; ++i )
3015 if ( eSub[i]->_cosin > theMinSmoothCosin )
3017 SMDS_ElemIteratorPtr fIt = eSub[i]->_nodes[0]->GetInverseElementIterator(SMDSAbs_Face);
3018 while ( fIt->more() && !eos._toSmooth )
3020 const SMDS_MeshElement* face = fIt->next();
3021 if ( face->getshapeId() == eos._shapeID &&
3022 getDistFromEdge( face, eSub[i]->_nodes[0], faceSize ))
3024 eos._toSmooth = needSmoothing( eSub[i]->_cosin,
3025 tgtThick * eSub[i]->_lenFactor,
3031 if ( eos._toSmooth )
3033 for ( TopExp_Explorer eExp( edgesByGeom[iS]._shape, TopAbs_EDGE ); eExp.More(); eExp.Next() )
3034 edgesOfSmooFaces.Add( eExp.Current() );
3036 data.PrepareEdgesToSmoothOnFace( &edgesByGeom[iS], /*substituteSrcNodes=*/false );
3038 data._nbShapesToSmooth += eos._toSmooth;
3042 for ( size_t iS = 0; iS < edgesByGeom.size(); ++iS ) // check EDGEs
3044 _EdgesOnShape& eos = edgesByGeom[iS];
3045 eos._edgeSmoother = NULL;
3046 if ( eos._edges.empty() || eos.ShapeType() != TopAbs_EDGE ) continue;
3047 if ( !eos._hyp.ToSmooth() ) continue;
3049 const TopoDS_Edge& E = TopoDS::Edge( edgesByGeom[iS]._shape );
3050 if ( SMESH_Algo::isDegenerated( E ) || !edgesOfSmooFaces.Contains( E ))
3053 double tgtThick = eos._hyp.GetTotalThickness();
3054 for ( TopoDS_Iterator vIt( E ); vIt.More() && !eos._toSmooth; vIt.Next() )
3056 TGeomID iV = getMeshDS()->ShapeToIndex( vIt.Value() );
3057 vector<_LayerEdge*>& eV = edgesByGeom[ iV ]._edges;
3058 if ( eV.empty() || eV[0]->Is( _LayerEdge::MULTI_NORMAL )) continue;
3059 gp_Vec eDir = getEdgeDir( E, TopoDS::Vertex( vIt.Value() ));
3060 double angle = eDir.Angle( eV[0]->_normal );
3061 double cosin = Cos( angle );
3062 double cosinAbs = Abs( cosin );
3063 if ( cosinAbs > theMinSmoothCosin )
3065 // always smooth analytic EDGEs
3066 Handle(Geom_Curve) curve = _Smoother1D::CurveForSmooth( E, eos, helper );
3067 eos._toSmooth = ! curve.IsNull();
3069 // compare tgtThick with the length of an end segment
3070 SMDS_ElemIteratorPtr eIt = eV[0]->_nodes[0]->GetInverseElementIterator(SMDSAbs_Edge);
3071 while ( eIt->more() && !eos._toSmooth )
3073 const SMDS_MeshElement* endSeg = eIt->next();
3074 if ( endSeg->getshapeId() == (int) iS )
3077 SMESH_TNodeXYZ( endSeg->GetNode( 0 )).Distance( endSeg->GetNode( 1 ));
3078 eos._toSmooth = needSmoothing( cosinAbs, tgtThick * eV[0]->_lenFactor, segLen );
3081 if ( eos._toSmooth )
3083 eos._edgeSmoother = new _Smoother1D( curve, eos );
3085 // for ( size_t i = 0; i < eos._edges.size(); ++i )
3086 // eos._edges[i]->Set( _LayerEdge::TO_SMOOTH );
3090 data._nbShapesToSmooth += eos._toSmooth;
3094 // Reset _cosin if no smooth is allowed by the user
3095 for ( size_t iS = 0; iS < edgesByGeom.size(); ++iS )
3097 _EdgesOnShape& eos = edgesByGeom[iS];
3098 if ( eos._edges.empty() ) continue;
3100 if ( !eos._hyp.ToSmooth() )
3101 for ( size_t i = 0; i < eos._edges.size(); ++i )
3102 //eos._edges[i]->SetCosin( 0 ); // keep _cosin to use in limitMaxLenByCurvature()
3103 eos._edges[i]->_lenFactor = 1;
3107 // Fill _eosC1 to make that C1 FACEs and EDGEs between them to be smoothed as a whole
3109 TopTools_MapOfShape c1VV;
3111 for ( size_t iS = 0; iS < edgesByGeom.size(); ++iS ) // check FACEs
3113 _EdgesOnShape& eos = edgesByGeom[iS];
3114 if ( eos._edges.empty() ||
3115 eos.ShapeType() != TopAbs_FACE ||
3119 // check EDGEs of a FACE
3120 TopTools_MapOfShape checkedEE, allVV;
3121 list< SMESH_subMesh* > smQueue( 1, eos._subMesh ); // sm of FACEs
3122 while ( !smQueue.empty() )
3124 SMESH_subMesh* sm = smQueue.front();
3125 smQueue.pop_front();
3126 SMESH_subMeshIteratorPtr smIt = sm->getDependsOnIterator(/*includeSelf=*/false);
3127 while ( smIt->more() )
3130 if ( sm->GetSubShape().ShapeType() == TopAbs_VERTEX )
3131 allVV.Add( sm->GetSubShape() );
3132 if ( sm->GetSubShape().ShapeType() != TopAbs_EDGE ||
3133 !checkedEE.Add( sm->GetSubShape() ))
3136 _EdgesOnShape* eoe = data.GetShapeEdges( sm->GetId() );
3137 vector<_LayerEdge*>& eE = eoe->_edges;
3138 if ( eE.empty() || !eoe->_sWOL.IsNull() )
3141 bool isC1 = true; // check continuity along an EDGE
3142 for ( size_t i = 0; i < eE.size() && isC1; ++i )
3143 isC1 = ( Abs( eE[i]->_cosin ) < theMinSmoothCosin );
3147 // check that mesh faces are C1 as well
3149 gp_XYZ norm1, norm2;
3150 const SMDS_MeshNode* n = eE[ eE.size() / 2 ]->_nodes[0];
3151 SMDS_ElemIteratorPtr fIt = n->GetInverseElementIterator(SMDSAbs_Face);
3152 if ( !SMESH_MeshAlgos::FaceNormal( fIt->next(), norm1, /*normalized=*/true ))
3154 while ( fIt->more() && isC1 )
3155 isC1 = ( SMESH_MeshAlgos::FaceNormal( fIt->next(), norm2, /*normalized=*/true ) &&
3156 Abs( norm1 * norm2 ) >= ( 1. - theMinSmoothCosin ));
3161 // add the EDGE and an adjacent FACE to _eosC1
3162 PShapeIteratorPtr fIt = helper.GetAncestors( sm->GetSubShape(), *_mesh, TopAbs_FACE );
3163 while ( const TopoDS_Shape* face = fIt->next() )
3165 _EdgesOnShape* eof = data.GetShapeEdges( *face );
3166 if ( !eof ) continue; // other solid
3167 if ( eos._shapeID == eof->_shapeID ) continue;
3168 if ( !eos.HasC1( eof ))
3171 eos._eosC1.push_back( eof );
3172 eof->_toSmooth = false;
3173 data.PrepareEdgesToSmoothOnFace( eof, /*substituteSrcNodes=*/false );
3174 smQueue.push_back( eof->_subMesh );
3176 if ( !eos.HasC1( eoe ))
3178 eos._eosC1.push_back( eoe );
3179 eoe->_toSmooth = false;
3180 data.PrepareEdgesToSmoothOnFace( eoe, /*substituteSrcNodes=*/false );
3185 if ( eos._eosC1.empty() )
3188 // check VERTEXes of C1 FACEs
3189 TopTools_MapIteratorOfMapOfShape vIt( allVV );
3190 for ( ; vIt.More(); vIt.Next() )
3192 _EdgesOnShape* eov = data.GetShapeEdges( vIt.Key() );
3193 if ( !eov || eov->_edges.empty() || !eov->_sWOL.IsNull() )
3196 bool isC1 = true; // check if all adjacent FACEs are in eos._eosC1
3197 PShapeIteratorPtr fIt = helper.GetAncestors( vIt.Key(), *_mesh, TopAbs_FACE );
3198 while ( const TopoDS_Shape* face = fIt->next() )
3200 _EdgesOnShape* eof = data.GetShapeEdges( *face );
3201 if ( !eof ) continue; // other solid
3202 isC1 = ( face->IsSame( eos._shape ) || eos.HasC1( eof ));
3208 eos._eosC1.push_back( eov );
3209 data.PrepareEdgesToSmoothOnFace( eov, /*substituteSrcNodes=*/false );
3210 c1VV.Add( eov->_shape );
3214 } // fill _eosC1 of FACEs
3219 vector< pair< _EdgesOnShape*, gp_XYZ > > dirOfEdges;
3221 for ( size_t iS = 0; iS < edgesByGeom.size(); ++iS ) // check VERTEXes
3223 _EdgesOnShape& eov = edgesByGeom[iS];
3224 if ( eov._edges.empty() ||
3225 eov.ShapeType() != TopAbs_VERTEX ||
3226 c1VV.Contains( eov._shape ))
3228 const TopoDS_Vertex& V = TopoDS::Vertex( eov._shape );
3230 // get directions of surrounding EDGEs
3232 PShapeIteratorPtr fIt = helper.GetAncestors( eov._shape, *_mesh, TopAbs_EDGE );
3233 while ( const TopoDS_Shape* e = fIt->next() )
3235 _EdgesOnShape* eoe = data.GetShapeEdges( *e );
3236 if ( !eoe ) continue; // other solid
3237 gp_XYZ eDir = getEdgeDir( TopoDS::Edge( *e ), V );
3238 if ( !Precision::IsInfinite( eDir.X() ))
3239 dirOfEdges.push_back( make_pair( eoe, eDir.Normalized() ));
3242 // find EDGEs with C1 directions
3243 for ( size_t i = 0; i < dirOfEdges.size(); ++i )
3244 for ( size_t j = i+1; j < dirOfEdges.size(); ++j )
3245 if ( dirOfEdges[i].first && dirOfEdges[j].first )
3247 double dot = dirOfEdges[i].second * dirOfEdges[j].second;
3248 bool isC1 = ( dot < - ( 1. - theMinSmoothCosin ));
3251 double maxEdgeLen = 3 * Min( eov._edges[0]->_maxLen, eov._hyp.GetTotalThickness() );
3252 double eLen1 = SMESH_Algo::EdgeLength( TopoDS::Edge( dirOfEdges[i].first->_shape ));
3253 double eLen2 = SMESH_Algo::EdgeLength( TopoDS::Edge( dirOfEdges[j].first->_shape ));
3254 if ( eLen1 < maxEdgeLen ) eov._eosC1.push_back( dirOfEdges[i].first );
3255 if ( eLen2 < maxEdgeLen ) eov._eosC1.push_back( dirOfEdges[j].first );
3256 dirOfEdges[i].first = 0;
3257 dirOfEdges[j].first = 0;
3260 } // fill _eosC1 of VERTEXes
3267 //================================================================================
3269 * \brief Set up _SolidData::_edgesOnShape
3271 //================================================================================
3273 void _ViscousBuilder::makeEdgesOnShape()
3275 const int nbShapes = getMeshDS()->MaxShapeIndex();
3277 for ( size_t i = 0; i < _sdVec.size(); ++i )
3279 _SolidData& data = _sdVec[ i ];
3280 vector< _EdgesOnShape >& edgesByGeom = data._edgesOnShape;
3281 edgesByGeom.resize( nbShapes+1 );
3283 // set data of _EdgesOnShape's
3284 if ( SMESH_subMesh* sm = _mesh->GetSubMesh( data._solid ))
3286 SMESH_subMeshIteratorPtr smIt = sm->getDependsOnIterator(/*includeSelf=*/false);
3287 while ( smIt->more() )
3290 if ( sm->GetSubShape().ShapeType() == TopAbs_FACE &&
3291 data._ignoreFaceIds.count( sm->GetId() ))
3294 setShapeData( edgesByGeom[ sm->GetId() ], sm, data );
3300 //================================================================================
3302 * \brief initialize data of _EdgesOnShape
3304 //================================================================================
3306 void _ViscousBuilder::setShapeData( _EdgesOnShape& eos,
3310 if ( !eos._shape.IsNull() ||
3311 sm->GetSubShape().ShapeType() == TopAbs_WIRE )
3314 SMESH_MesherHelper helper( *_mesh );
3317 eos._shapeID = sm->GetId();
3318 eos._shape = sm->GetSubShape();
3319 if ( eos.ShapeType() == TopAbs_FACE )
3320 eos._shape.Orientation( helper.GetSubShapeOri( data._solid, eos._shape ));
3321 eos._toSmooth = false;
3325 map< TGeomID, TopoDS_Shape >::const_iterator s2s =
3326 data._shrinkShape2Shape.find( eos._shapeID );
3327 if ( s2s != data._shrinkShape2Shape.end() )
3328 eos._sWOL = s2s->second;
3330 eos._isRegularSWOL = true;
3331 if ( eos.SWOLType() == TopAbs_FACE )
3333 const TopoDS_Face& F = TopoDS::Face( eos._sWOL );
3334 Handle(ShapeAnalysis_Surface) surface = helper.GetSurface( F );
3335 eos._isRegularSWOL = ( ! surface->HasSingularities( 1e-7 ));
3339 if ( data._hyps.size() == 1 )
3341 eos._hyp = data._hyps.back();
3345 // compute average StdMeshers_ViscousLayers parameters
3346 map< TGeomID, const StdMeshers_ViscousLayers* >::iterator f2hyp;
3347 if ( eos.ShapeType() == TopAbs_FACE )
3349 if (( f2hyp = data._face2hyp.find( eos._shapeID )) != data._face2hyp.end() )
3350 eos._hyp = f2hyp->second;
3354 PShapeIteratorPtr fIt = helper.GetAncestors( eos._shape, *_mesh, TopAbs_FACE );
3355 while ( const TopoDS_Shape* face = fIt->next() )
3357 TGeomID faceID = getMeshDS()->ShapeToIndex( *face );
3358 if (( f2hyp = data._face2hyp.find( faceID )) != data._face2hyp.end() )
3359 eos._hyp.Add( f2hyp->second );
3365 if ( ! eos._hyp.UseSurfaceNormal() )
3367 if ( eos.ShapeType() == TopAbs_FACE ) // get normals to elements on a FACE
3369 SMESHDS_SubMesh* smDS = sm->GetSubMeshDS();
3370 if ( !smDS ) return;
3371 eos._faceNormals.reserve( smDS->NbElements() );
3373 double oriFactor = helper.IsReversedSubMesh( TopoDS::Face( eos._shape )) ? 1.: -1.;
3374 SMDS_ElemIteratorPtr eIt = smDS->GetElements();
3375 for ( ; eIt->more(); )
3377 const SMDS_MeshElement* face = eIt->next();
3378 gp_XYZ& norm = eos._faceNormals[face];
3379 if ( !SMESH_MeshAlgos::FaceNormal( face, norm, /*normalized=*/true ))
3380 norm.SetCoord( 0,0,0 );
3384 else // find EOS of adjacent FACEs
3386 PShapeIteratorPtr fIt = helper.GetAncestors( eos._shape, *_mesh, TopAbs_FACE );
3387 while ( const TopoDS_Shape* face = fIt->next() )
3389 TGeomID faceID = getMeshDS()->ShapeToIndex( *face );
3390 eos._faceEOS.push_back( & data._edgesOnShape[ faceID ]);
3391 if ( eos._faceEOS.back()->_shape.IsNull() )
3392 // avoid using uninitialised _shapeID in GetNormal()
3393 eos._faceEOS.back()->_shapeID = faceID;
3399 //================================================================================
3401 * \brief Returns normal of a face
3403 //================================================================================
3405 bool _EdgesOnShape::GetNormal( const SMDS_MeshElement* face, gp_Vec& norm )
3408 _EdgesOnShape* eos = 0;
3410 if ( face->getshapeId() == _shapeID )
3416 for ( size_t iF = 0; iF < _faceEOS.size() && !eos; ++iF )
3417 if ( face->getshapeId() == _faceEOS[ iF ]->_shapeID )
3418 eos = _faceEOS[ iF ];
3422 ( ok = ( eos->_faceNormals.count( face ) )))
3424 norm = eos->_faceNormals[ face ];
3428 debugMsg( "_EdgesOnShape::Normal() failed for face "<<face->GetID()
3429 << " on _shape #" << _shapeID );
3434 //================================================================================
3436 * \brief EdgesOnShape destructor
3438 //================================================================================
3440 _EdgesOnShape::~_EdgesOnShape()
3442 delete _edgeSmoother;
3445 //================================================================================
3447 * \brief Set data of _LayerEdge needed for smoothing
3449 //================================================================================
3451 bool _ViscousBuilder::setEdgeData(_LayerEdge& edge,
3453 SMESH_MesherHelper& helper,
3456 const SMDS_MeshNode* node = edge._nodes[0]; // source node
3459 edge._maxLen = Precision::Infinite();
3462 edge._curvature = 0;
3464 edge._smooFunction = 0;
3466 // --------------------------
3467 // Compute _normal and _cosin
3468 // --------------------------
3471 edge._lenFactor = 1.;
3472 edge._normal.SetCoord(0,0,0);
3473 _Simplex::GetSimplices( node, edge._simplices, data._ignoreFaceIds, &data );
3475 int totalNbFaces = 0;
3477 std::pair< TopoDS_Face, gp_XYZ > face2Norm[20];
3481 const bool onShrinkShape = !eos._sWOL.IsNull();
3482 const bool useGeometry = (( eos._hyp.UseSurfaceNormal() ) ||
3483 ( eos.ShapeType() != TopAbs_FACE /*&& !onShrinkShape*/ ));
3485 // get geom FACEs the node lies on
3486 //if ( useGeometry )
3488 set<TGeomID> faceIds;
3489 if ( eos.ShapeType() == TopAbs_FACE )
3491 faceIds.insert( eos._shapeID );
3495 SMDS_ElemIteratorPtr fIt = node->GetInverseElementIterator(SMDSAbs_Face);
3496 while ( fIt->more() )
3497 faceIds.insert( fIt->next()->getshapeId() );
3499 set<TGeomID>::iterator id = faceIds.begin();
3500 for ( ; id != faceIds.end(); ++id )
3502 const TopoDS_Shape& s = getMeshDS()->IndexToShape( *id );
3503 if ( s.IsNull() || s.ShapeType() != TopAbs_FACE || data._ignoreFaceIds.count( *id ))
3505 F = TopoDS::Face( s );
3506 face2Norm[ totalNbFaces ].first = F;
3512 bool fromVonF = false;
3515 fromVonF = ( eos.ShapeType() == TopAbs_VERTEX &&
3516 eos.SWOLType() == TopAbs_FACE &&
3519 if ( onShrinkShape && !fromVonF ) // one of faces the node is on has no layers
3521 if ( eos.SWOLType() == TopAbs_EDGE )
3523 // inflate from VERTEX along EDGE
3524 edge._normal = getEdgeDir( TopoDS::Edge( eos._sWOL ), TopoDS::Vertex( eos._shape ));
3526 else if ( eos.ShapeType() == TopAbs_VERTEX )
3528 // inflate from VERTEX along FACE
3529 edge._normal = getFaceDir( TopoDS::Face( eos._sWOL ), TopoDS::Vertex( eos._shape ),
3530 node, helper, normOK, &edge._cosin);
3534 // inflate from EDGE along FACE
3535 edge._normal = getFaceDir( TopoDS::Face( eos._sWOL ), TopoDS::Edge( eos._shape ),
3536 node, helper, normOK);
3539 else // layers are on all FACEs of SOLID the node is on (or fromVonF)
3542 face2Norm[ totalNbFaces++ ].first = TopoDS::Face( eos._sWOL );
3545 for ( int iF = totalNbFaces - 1; iF >= 0; --iF )
3547 F = face2Norm[ iF ].first;
3548 geomNorm = getFaceNormal( node, F, helper, normOK );
3549 if ( !normOK ) continue;
3552 if ( helper.GetSubShapeOri( data._solid, F ) != TopAbs_REVERSED )
3554 face2Norm[ iF ].second = geomNorm.XYZ();
3555 edge._normal += geomNorm.XYZ();
3557 if ( nbOkNorms == 0 )
3558 return error(SMESH_Comment("Can't get normal to node ") << node->GetID(), data._index);
3560 if ( totalNbFaces >= 3 )
3562 edge._normal = getNormalByOffset( &edge, face2Norm, totalNbFaces, fromVonF );
3565 if ( edge._normal.Modulus() < 1e-3 && nbOkNorms > 1 )
3567 // opposite normals, re-get normals at shifted positions (IPAL 52426)
3568 edge._normal.SetCoord( 0,0,0 );
3569 for ( int iF = 0; iF < totalNbFaces - fromVonF; ++iF )
3571 const TopoDS_Face& F = face2Norm[iF].first;
3572 geomNorm = getFaceNormal( node, F, helper, normOK, /*shiftInside=*/true );
3573 if ( helper.GetSubShapeOri( data._solid, F ) != TopAbs_REVERSED )
3576 face2Norm[ iF ].second = geomNorm.XYZ();
3577 edge._normal += face2Norm[ iF ].second;
3582 else // !useGeometry - get _normal using surrounding mesh faces
3584 edge._normal = getWeigthedNormal( &edge );
3586 // set<TGeomID> faceIds;
3588 // SMDS_ElemIteratorPtr fIt = node->GetInverseElementIterator(SMDSAbs_Face);
3589 // while ( fIt->more() )
3591 // const SMDS_MeshElement* face = fIt->next();
3592 // if ( eos.GetNormal( face, geomNorm ))
3594 // if ( onShrinkShape && !faceIds.insert( face->getshapeId() ).second )
3595 // continue; // use only one mesh face on FACE
3596 // edge._normal += geomNorm.XYZ();
3603 //if ( eos._hyp.UseSurfaceNormal() )
3605 switch ( eos.ShapeType() )
3612 TopoDS_Edge E = TopoDS::Edge( eos._shape );
3613 gp_Vec inFaceDir = getFaceDir( F, E, node, helper, normOK );
3614 double angle = inFaceDir.Angle( edge._normal ); // [0,PI]
3615 edge._cosin = Cos( angle );
3618 case TopAbs_VERTEX: {
3621 getFaceDir( TopoDS::Face( eos._sWOL ), TopoDS::Vertex( eos._shape ),
3622 node, helper, normOK, &edge._cosin );
3624 else if ( eos.SWOLType() != TopAbs_FACE ) // else _cosin is set by getFaceDir()
3626 TopoDS_Vertex V = TopoDS::Vertex( eos._shape );
3627 gp_Vec inFaceDir = getFaceDir( F, V, node, helper, normOK );
3628 double angle = inFaceDir.Angle( edge._normal ); // [0,PI]
3629 edge._cosin = Cos( angle );
3630 if ( totalNbFaces > 2 || helper.IsSeamShape( node->getshapeId() ))
3631 for ( int iF = 1; iF < totalNbFaces; ++iF )
3633 F = face2Norm[ iF ].first;
3634 inFaceDir = getFaceDir( F, V, node, helper, normOK=true );
3636 double angle = inFaceDir.Angle( edge._normal );
3637 double cosin = Cos( angle );
3638 if ( Abs( cosin ) > Abs( edge._cosin ))
3639 edge._cosin = cosin;
3646 return error(SMESH_Comment("Invalid shape position of node ")<<node, data._index);
3650 double normSize = edge._normal.SquareModulus();
3651 if ( normSize < numeric_limits<double>::min() )
3652 return error(SMESH_Comment("Bad normal at node ")<< node->GetID(), data._index );
3654 edge._normal /= sqrt( normSize );
3656 if ( edge.Is( _LayerEdge::MULTI_NORMAL ) && edge._nodes.size() == 2 )
3658 getMeshDS()->RemoveFreeNode( edge._nodes.back(), 0, /*fromGroups=*/false );
3659 edge._nodes.resize( 1 );
3660 edge._normal.SetCoord( 0,0,0 );
3661 edge.SetMaxLen( 0 );
3664 // Set the rest data
3665 // --------------------
3667 edge.SetCosin( edge._cosin ); // to update edge._lenFactor
3669 if ( onShrinkShape )
3671 const SMDS_MeshNode* tgtNode = edge._nodes.back();
3672 if ( SMESHDS_SubMesh* sm = getMeshDS()->MeshElements( data._solid ))
3673 sm->RemoveNode( tgtNode );
3675 // set initial position which is parameters on _sWOL in this case
3676 if ( eos.SWOLType() == TopAbs_EDGE )
3678 double u = helper.GetNodeU( TopoDS::Edge( eos._sWOL ), node, 0, &normOK );
3679 edge._pos.push_back( gp_XYZ( u, 0, 0 ));
3680 if ( edge._nodes.size() > 1 )
3681 getMeshDS()->SetNodeOnEdge( tgtNode, TopoDS::Edge( eos._sWOL ), u );
3683 else // eos.SWOLType() == TopAbs_FACE
3685 gp_XY uv = helper.GetNodeUV( TopoDS::Face( eos._sWOL ), node, 0, &normOK );
3686 edge._pos.push_back( gp_XYZ( uv.X(), uv.Y(), 0));
3687 if ( edge._nodes.size() > 1 )
3688 getMeshDS()->SetNodeOnFace( tgtNode, TopoDS::Face( eos._sWOL ), uv.X(), uv.Y() );
3691 if ( edge._nodes.size() > 1 )
3693 // check if an angle between a FACE with layers and SWOL is sharp,
3694 // else the edge should not inflate
3696 for ( int iF = 0; iF < totalNbFaces && F.IsNull(); ++iF ) // find a FACE with VL
3697 if ( ! helper.IsSubShape( eos._sWOL, face2Norm[iF].first ))
3698 F = face2Norm[iF].first;
3701 geomNorm = getFaceNormal( node, F, helper, normOK );
3702 if ( helper.GetSubShapeOri( data._solid, F ) != TopAbs_REVERSED )
3703 geomNorm.Reverse(); // inside the SOLID
3704 if ( geomNorm * edge._normal < -0.001 )
3706 getMeshDS()->RemoveFreeNode( tgtNode, 0, /*fromGroups=*/false );
3707 edge._nodes.resize( 1 );
3709 else if ( edge._lenFactor > 3 )
3711 edge._lenFactor = 2;
3712 edge.Set( _LayerEdge::RISKY_SWOL );
3719 edge._pos.push_back( SMESH_TNodeXYZ( node ));
3721 if ( eos.ShapeType() == TopAbs_FACE )
3724 for ( size_t i = 0; i < edge._simplices.size(); ++i )
3726 edge._simplices[i].IsMinAngleOK( edge._pos.back(), angle );
3727 edge._minAngle = Max( edge._minAngle, angle ); // "angle" is actually cosine
3732 // Set neighbor nodes for a _LayerEdge based on EDGE
3734 if ( eos.ShapeType() == TopAbs_EDGE /*||
3735 ( onShrinkShape && posType == SMDS_TOP_VERTEX && fabs( edge._cosin ) < 1e-10 )*/)
3737 edge._2neibors = _Factory::NewNearEdges();
3738 // target nodes instead of source ones will be set later
3744 //================================================================================
3746 * \brief Return normal to a FACE at a node
3747 * \param [in] n - node
3748 * \param [in] face - FACE
3749 * \param [in] helper - helper
3750 * \param [out] isOK - true or false
3751 * \param [in] shiftInside - to find normal at a position shifted inside the face
3752 * \return gp_XYZ - normal
3754 //================================================================================
3756 gp_XYZ _ViscousBuilder::getFaceNormal(const SMDS_MeshNode* node,
3757 const TopoDS_Face& face,
3758 SMESH_MesherHelper& helper,
3765 // get a shifted position
3766 gp_Pnt p = SMESH_TNodeXYZ( node );
3767 gp_XYZ shift( 0,0,0 );
3768 TopoDS_Shape S = helper.GetSubShapeByNode( node, helper.GetMeshDS() );
3769 switch ( S.ShapeType() ) {
3772 shift = getFaceDir( face, TopoDS::Vertex( S ), node, helper, isOK );
3777 shift = getFaceDir( face, TopoDS::Edge( S ), node, helper, isOK );
3785 p.Translate( shift * 1e-5 );
3787 TopLoc_Location loc;
3788 GeomAPI_ProjectPointOnSurf& projector = helper.GetProjector( face, loc, 1e-7 );
3790 if ( !loc.IsIdentity() ) p.Transform( loc.Transformation().Inverted() );
3792 projector.Perform( p );
3793 if ( !projector.IsDone() || projector.NbPoints() < 1 )
3799 projector.LowerDistanceParameters(U,V);
3804 uv = helper.GetNodeUV( face, node, 0, &isOK );
3810 Handle(Geom_Surface) surface = BRep_Tool::Surface( face );
3812 if ( !shiftInside &&
3813 helper.IsDegenShape( node->getshapeId() ) &&
3814 getFaceNormalAtSingularity( uv, face, helper, normal ))
3817 return normal.XYZ();
3820 int pointKind = GeomLib::NormEstim( surface, uv, 1e-5, normal );
3821 enum { REGULAR = 0, QUASYSINGULAR, CONICAL, IMPOSSIBLE };
3823 if ( pointKind == IMPOSSIBLE &&
3824 node->GetPosition()->GetDim() == 2 ) // node inside the FACE
3826 // probably NormEstim() failed due to a too high tolerance
3827 pointKind = GeomLib::NormEstim( surface, uv, 1e-20, normal );
3828 isOK = ( pointKind < IMPOSSIBLE );
3830 if ( pointKind < IMPOSSIBLE )
3832 if ( pointKind != REGULAR &&
3834 node->GetPosition()->GetDim() < 2 ) // FACE boundary
3836 gp_XYZ normShift = getFaceNormal( node, face, helper, isOK, /*shiftInside=*/true );
3837 if ( normShift * normal.XYZ() < 0. )
3843 if ( !isOK ) // hard singularity, to call with shiftInside=true ?
3845 const TGeomID faceID = helper.GetMeshDS()->ShapeToIndex( face );
3847 SMDS_ElemIteratorPtr fIt = node->GetInverseElementIterator(SMDSAbs_Face);
3848 while ( fIt->more() )
3850 const SMDS_MeshElement* f = fIt->next();
3851 if ( f->getshapeId() == faceID )
3853 isOK = SMESH_MeshAlgos::FaceNormal( f, (gp_XYZ&) normal.XYZ(), /*normalized=*/true );
3856 TopoDS_Face ff = face;
3857 ff.Orientation( TopAbs_FORWARD );
3858 if ( helper.IsReversedSubMesh( ff ))
3865 return normal.XYZ();
3868 //================================================================================
3870 * \brief Try to get normal at a singularity of a surface basing on it's nature
3872 //================================================================================
3874 bool _ViscousBuilder::getFaceNormalAtSingularity( const gp_XY& uv,
3875 const TopoDS_Face& face,
3876 SMESH_MesherHelper& helper,
3879 BRepAdaptor_Surface surface( face );
3881 if ( !getRovolutionAxis( surface, axis ))
3884 double f,l, d, du, dv;
3885 f = surface.FirstUParameter();
3886 l = surface.LastUParameter();
3887 d = ( uv.X() - f ) / ( l - f );
3888 du = ( d < 0.5 ? +1. : -1 ) * 1e-5 * ( l - f );
3889 f = surface.FirstVParameter();
3890 l = surface.LastVParameter();
3891 d = ( uv.Y() - f ) / ( l - f );
3892 dv = ( d < 0.5 ? +1. : -1 ) * 1e-5 * ( l - f );
3895 gp_Pnt2d testUV = uv;
3896 enum { REGULAR = 0, QUASYSINGULAR, CONICAL, IMPOSSIBLE };
3898 Handle(Geom_Surface) geomsurf = surface.Surface().Surface();
3899 for ( int iLoop = 0; true ; ++iLoop )
3901 testUV.SetCoord( testUV.X() + du, testUV.Y() + dv );
3902 if ( GeomLib::NormEstim( geomsurf, testUV, tol, refDir ) == REGULAR )
3909 if ( axis * refDir < 0. )
3917 //================================================================================
3919 * \brief Return a normal at a node weighted with angles taken by faces
3921 //================================================================================
3923 gp_XYZ _ViscousBuilder::getWeigthedNormal( const _LayerEdge* edge )
3925 const SMDS_MeshNode* n = edge->_nodes[0];
3927 gp_XYZ resNorm(0,0,0);
3928 SMESH_TNodeXYZ p0( n ), pP, pN;
3929 for ( size_t i = 0; i < edge->_simplices.size(); ++i )
3931 pP.Set( edge->_simplices[i]._nPrev );
3932 pN.Set( edge->_simplices[i]._nNext );
3933 gp_Vec v0P( p0, pP ), v0N( p0, pN ), vPN( pP, pN ), norm = v0P ^ v0N;
3934 double l0P = v0P.SquareMagnitude();
3935 double l0N = v0N.SquareMagnitude();
3936 double lPN = vPN.SquareMagnitude();
3937 if ( l0P < std::numeric_limits<double>::min() ||
3938 l0N < std::numeric_limits<double>::min() ||
3939 lPN < std::numeric_limits<double>::min() )
3941 double lNorm = norm.SquareMagnitude();
3942 double sin2 = lNorm / l0P / l0N;
3943 double angle = ACos(( v0P * v0N ) / Sqrt( l0P ) / Sqrt( l0N ));
3945 double weight = sin2 * angle / lPN;
3946 resNorm += weight * norm.XYZ() / Sqrt( lNorm );
3952 //================================================================================
3954 * \brief Return a normal at a node by getting a common point of offset planes
3955 * defined by the FACE normals
3957 //================================================================================
3959 gp_XYZ _ViscousBuilder::getNormalByOffset( _LayerEdge* edge,
3960 std::pair< TopoDS_Face, gp_XYZ > f2Normal[],
3964 SMESH_TNodeXYZ p0 = edge->_nodes[0];
3966 gp_XYZ resNorm(0,0,0);
3967 TopoDS_Shape V = SMESH_MesherHelper::GetSubShapeByNode( p0._node, getMeshDS() );
3968 if ( V.ShapeType() != TopAbs_VERTEX || nbFaces < 3 )
3970 for ( int i = 0; i < nbFaces; ++i )
3971 resNorm += f2Normal[i].second;
3975 // prepare _OffsetPlane's
3976 vector< _OffsetPlane > pln( nbFaces );
3977 for ( int i = 0; i < nbFaces - lastNoOffset; ++i )
3979 pln[i]._faceIndex = i;
3980 pln[i]._plane = gp_Pln( p0 + f2Normal[i].second, f2Normal[i].second );
3984 pln[ nbFaces - 1 ]._faceIndex = nbFaces - 1;
3985 pln[ nbFaces - 1 ]._plane = gp_Pln( p0, f2Normal[ nbFaces - 1 ].second );
3988 // intersect neighboring OffsetPlane's
3989 PShapeIteratorPtr edgeIt = SMESH_MesherHelper::GetAncestors( V, *_mesh, TopAbs_EDGE );
3990 while ( const TopoDS_Shape* edge = edgeIt->next() )
3992 int f1 = -1, f2 = -1;
3993 for ( int i = 0; i < nbFaces && f2 < 0; ++i )
3994 if ( SMESH_MesherHelper::IsSubShape( *edge, f2Normal[i].first ))
3995 (( f1 < 0 ) ? f1 : f2 ) = i;
3998 pln[ f1 ].ComputeIntersectionLine( pln[ f2 ], TopoDS::Edge( *edge ), TopoDS::Vertex( V ));
4001 // get a common point
4002 gp_XYZ commonPnt( 0, 0, 0 );
4005 for ( int i = 0; i < nbFaces; ++i )
4007 commonPnt += pln[ i ].GetCommonPoint( isPointFound, TopoDS::Vertex( V ));
4008 nbPoints += isPointFound;
4010 gp_XYZ wgtNorm = getWeigthedNormal( edge );
4011 if ( nbPoints == 0 )
4014 commonPnt /= nbPoints;
4015 resNorm = commonPnt - p0;
4019 // choose the best among resNorm and wgtNorm
4020 resNorm.Normalize();
4021 wgtNorm.Normalize();
4022 double resMinDot = std::numeric_limits<double>::max();
4023 double wgtMinDot = std::numeric_limits<double>::max();
4024 for ( int i = 0; i < nbFaces - lastNoOffset; ++i )
4026 resMinDot = Min( resMinDot, resNorm * f2Normal[i].second );
4027 wgtMinDot = Min( wgtMinDot, wgtNorm * f2Normal[i].second );
4030 if ( Max( resMinDot, wgtMinDot ) < theMinSmoothCosin )
4032 edge->Set( _LayerEdge::MULTI_NORMAL );
4035 return ( resMinDot > wgtMinDot ) ? resNorm : wgtNorm;
4038 //================================================================================
4040 * \brief Compute line of intersection of 2 planes
4042 //================================================================================
4044 void _OffsetPlane::ComputeIntersectionLine( _OffsetPlane& pln,
4045 const TopoDS_Edge& E,
4046 const TopoDS_Vertex& V )
4048 int iNext = bool( _faceIndexNext[0] >= 0 );
4049 _faceIndexNext[ iNext ] = pln._faceIndex;
4051 gp_XYZ n1 = _plane.Axis().Direction().XYZ();
4052 gp_XYZ n2 = pln._plane.Axis().Direction().XYZ();
4054 gp_XYZ lineDir = n1 ^ n2;
4056 double x = Abs( lineDir.X() );
4057 double y = Abs( lineDir.Y() );
4058 double z = Abs( lineDir.Z() );
4060 int cooMax; // max coordinate
4062 if (x > z) cooMax = 1;
4066 if (y > z) cooMax = 2;
4071 if ( Abs( lineDir.Coord( cooMax )) < 0.05 )
4073 // parallel planes - intersection is an offset of the common EDGE
4074 gp_Pnt p = BRep_Tool::Pnt( V );
4075 linePos = 0.5 * (( p.XYZ() + n1 ) + ( p.XYZ() + n2 ));
4076 lineDir = getEdgeDir( E, V );
4080 // the constants in the 2 plane equations
4081 double d1 = - ( _plane.Axis().Direction().XYZ() * _plane.Location().XYZ() );
4082 double d2 = - ( pln._plane.Axis().Direction().XYZ() * pln._plane.Location().XYZ() );
4087 linePos.SetY(( d2*n1.Z() - d1*n2.Z()) / lineDir.X() );
4088 linePos.SetZ(( d1*n2.Y() - d2*n1.Y()) / lineDir.X() );
4091 linePos.SetX(( d1*n2.Z() - d2*n1.Z()) / lineDir.Y() );
4093 linePos.SetZ(( d2*n1.X() - d1*n2.X()) / lineDir.Y() );
4096 linePos.SetX(( d2*n1.Y() - d1*n2.Y()) / lineDir.Z() );
4097 linePos.SetY(( d1*n2.X() - d2*n1.X()) / lineDir.Z() );
4101 gp_Lin& line = _lines[ iNext ];
4102 line.SetDirection( lineDir );
4103 line.SetLocation ( linePos );
4105 _isLineOK[ iNext ] = true;
4108 iNext = bool( pln._faceIndexNext[0] >= 0 );
4109 pln._lines [ iNext ] = line;
4110 pln._faceIndexNext[ iNext ] = this->_faceIndex;
4111 pln._isLineOK [ iNext ] = true;
4114 //================================================================================
4116 * \brief Computes intersection point of two _lines
4118 //================================================================================
4120 gp_XYZ _OffsetPlane::GetCommonPoint(bool& isFound,
4121 const TopoDS_Vertex & V) const
4126 if ( NbLines() == 2 )
4128 gp_Vec lPerp0 = _lines[0].Direction().XYZ() ^ _plane.Axis().Direction().XYZ();
4129 double dot01 = lPerp0 * _lines[1].Direction().XYZ();
4130 if ( Abs( dot01 ) > 0.05 )
4132 gp_Vec l0l1 = _lines[1].Location().XYZ() - _lines[0].Location().XYZ();
4133 double u1 = - ( lPerp0 * l0l1 ) / dot01;
4134 p = ( _lines[1].Location().XYZ() + _lines[1].Direction().XYZ() * u1 );
4139 gp_Pnt pV ( BRep_Tool::Pnt( V ));
4140 gp_Vec lv0( _lines[0].Location(), pV ), lv1(_lines[1].Location(), pV );
4141 double dot0( lv0 * _lines[0].Direction() ), dot1( lv1 * _lines[1].Direction() );
4142 p += 0.5 * ( _lines[0].Location().XYZ() + _lines[0].Direction().XYZ() * dot0 );
4143 p += 0.5 * ( _lines[1].Location().XYZ() + _lines[1].Direction().XYZ() * dot1 );
4151 //================================================================================
4153 * \brief Find 2 neighbor nodes of a node on EDGE
4155 //================================================================================
4157 bool _ViscousBuilder::findNeiborsOnEdge(const _LayerEdge* edge,
4158 const SMDS_MeshNode*& n1,
4159 const SMDS_MeshNode*& n2,
4163 const SMDS_MeshNode* node = edge->_nodes[0];
4164 const int shapeInd = eos._shapeID;
4165 SMESHDS_SubMesh* edgeSM = 0;
4166 if ( eos.ShapeType() == TopAbs_EDGE )
4168 edgeSM = eos._subMesh->GetSubMeshDS();
4169 if ( !edgeSM || edgeSM->NbElements() == 0 )
4170 return error(SMESH_Comment("Not meshed EDGE ") << shapeInd, data._index);
4174 SMDS_ElemIteratorPtr eIt = node->GetInverseElementIterator(SMDSAbs_Edge);
4175 while ( eIt->more() && !n2 )
4177 const SMDS_MeshElement* e = eIt->next();
4178 const SMDS_MeshNode* nNeibor = e->GetNode( 0 );
4179 if ( nNeibor == node ) nNeibor = e->GetNode( 1 );
4182 if (!edgeSM->Contains(e)) continue;
4186 TopoDS_Shape s = SMESH_MesherHelper::GetSubShapeByNode( nNeibor, getMeshDS() );
4187 if ( !SMESH_MesherHelper::IsSubShape( s, eos._sWOL )) continue;
4189 ( iN++ ? n2 : n1 ) = nNeibor;
4192 return error(SMESH_Comment("Wrongly meshed EDGE ") << shapeInd, data._index);
4196 //================================================================================
4198 * \brief Create _Curvature
4200 //================================================================================
4202 _Curvature* _Curvature::New( double avgNormProj, double avgDist )
4204 // double _r; // radius
4205 // double _k; // factor to correct node smoothed position
4206 // double _h2lenRatio; // avgNormProj / (2*avgDist)
4207 // gp_Pnt2d _uv; // UV used in putOnOffsetSurface()
4210 if ( fabs( avgNormProj / avgDist ) > 1./200 )
4212 c = _Factory::NewCurvature();
4213 c->_r = avgDist * avgDist / avgNormProj;
4214 c->_k = avgDist * avgDist / c->_r / c->_r;
4215 //c->_k = avgNormProj / c->_r;
4216 c->_k *= ( c->_r < 0 ? 1/1.1 : 1.1 ); // not to be too restrictive
4217 c->_h2lenRatio = avgNormProj / ( avgDist + avgDist );
4219 c->_uv.SetCoord( 0., 0. );
4224 //================================================================================
4226 * \brief Set _curvature and _2neibors->_plnNorm by 2 neighbor nodes residing the same EDGE
4228 //================================================================================
4230 void _LayerEdge::SetDataByNeighbors( const SMDS_MeshNode* n1,
4231 const SMDS_MeshNode* n2,
4232 const _EdgesOnShape& eos,
4233 SMESH_MesherHelper& helper)
4235 if ( eos.ShapeType() != TopAbs_EDGE )
4237 if ( _curvature && Is( SMOOTHED_C1 ))
4240 gp_XYZ pos = SMESH_TNodeXYZ( _nodes[0] );
4241 gp_XYZ vec1 = pos - SMESH_TNodeXYZ( n1 );
4242 gp_XYZ vec2 = pos - SMESH_TNodeXYZ( n2 );
4246 double sumLen = vec1.Modulus() + vec2.Modulus();
4247 _2neibors->_wgt[0] = 1 - vec1.Modulus() / sumLen;
4248 _2neibors->_wgt[1] = 1 - vec2.Modulus() / sumLen;
4249 double avgNormProj = 0.5 * ( _normal * vec1 + _normal * vec2 );
4250 double avgLen = 0.5 * ( vec1.Modulus() + vec2.Modulus() );
4251 _curvature = _Curvature::New( avgNormProj, avgLen );
4252 // if ( _curvature )
4253 // debugMsg( _nodes[0]->GetID()
4254 // << " CURV r,k: " << _curvature->_r<<","<<_curvature->_k
4255 // << " proj = "<<avgNormProj<< " len = " << avgLen << "| lenDelta(0) = "
4256 // << _curvature->lenDelta(0) );
4260 if ( eos._sWOL.IsNull() )
4262 TopoDS_Edge E = TopoDS::Edge( eos._shape );
4263 // if ( SMESH_Algo::isDegenerated( E ))
4265 gp_XYZ dirE = getEdgeDir( E, _nodes[0], helper );
4266 gp_XYZ plnNorm = dirE ^ _normal;
4267 double proj0 = plnNorm * vec1;
4268 double proj1 = plnNorm * vec2;
4269 if ( fabs( proj0 ) > 1e-10 || fabs( proj1 ) > 1e-10 )
4271 if ( _2neibors->_plnNorm ) delete _2neibors->_plnNorm;
4272 _2neibors->_plnNorm = new gp_XYZ( plnNorm.Normalized() );
4277 //================================================================================
4279 * \brief Copy data from a _LayerEdge of other SOLID and based on the same node;
4280 * this and the other _LayerEdge are inflated along a FACE or an EDGE
4282 //================================================================================
4284 gp_XYZ _LayerEdge::Copy( _LayerEdge& other,
4286 SMESH_MesherHelper& helper )
4288 _nodes = other._nodes;
4289 _normal = other._normal;
4291 _lenFactor = other._lenFactor;
4292 _cosin = other._cosin;
4293 _2neibors = other._2neibors;
4294 _curvature = other._curvature;
4295 _2neibors = other._2neibors;
4296 _maxLen = Precision::Infinite();//other._maxLen;
4300 gp_XYZ lastPos( 0,0,0 );
4301 if ( eos.SWOLType() == TopAbs_EDGE )
4303 double u = helper.GetNodeU( TopoDS::Edge( eos._sWOL ), _nodes[0] );
4304 _pos.push_back( gp_XYZ( u, 0, 0));
4306 u = helper.GetNodeU( TopoDS::Edge( eos._sWOL ), _nodes.back() );
4311 gp_XY uv = helper.GetNodeUV( TopoDS::Face( eos._sWOL ), _nodes[0]);
4312 _pos.push_back( gp_XYZ( uv.X(), uv.Y(), 0));
4314 uv = helper.GetNodeUV( TopoDS::Face( eos._sWOL ), _nodes.back() );
4315 lastPos.SetX( uv.X() );
4316 lastPos.SetY( uv.Y() );
4321 //================================================================================
4323 * \brief Set _cosin and _lenFactor
4325 //================================================================================
4327 void _LayerEdge::SetCosin( double cosin )
4330 cosin = Abs( _cosin );
4331 //_lenFactor = ( cosin < 1.-1e-12 ) ? Min( 2., 1./sqrt(1-cosin*cosin )) : 1.0;
4332 _lenFactor = ( cosin < 1.-1e-12 ) ? 1./sqrt(1-cosin*cosin ) : 1.0;
4335 //================================================================================
4337 * \brief Check if another _LayerEdge is a neighbor on EDGE
4339 //================================================================================
4341 bool _LayerEdge::IsNeiborOnEdge( const _LayerEdge* edge ) const
4343 return (( this->_2neibors && this->_2neibors->include( edge )) ||
4344 ( edge->_2neibors && edge->_2neibors->include( this )));
4347 //================================================================================
4349 * \brief Fills a vector<_Simplex >
4351 //================================================================================
4353 void _Simplex::GetSimplices( const SMDS_MeshNode* node,
4354 vector<_Simplex>& simplices,
4355 const set<TGeomID>& ingnoreShapes,
4356 const _SolidData* dataToCheckOri,
4360 SMDS_ElemIteratorPtr fIt = node->GetInverseElementIterator(SMDSAbs_Face);
4361 while ( fIt->more() )
4363 const SMDS_MeshElement* f = fIt->next();
4364 const TGeomID shapeInd = f->getshapeId();
4365 if ( ingnoreShapes.count( shapeInd )) continue;
4366 const int nbNodes = f->NbCornerNodes();
4367 const int srcInd = f->GetNodeIndex( node );
4368 const SMDS_MeshNode* nPrev = f->GetNode( SMESH_MesherHelper::WrapIndex( srcInd-1, nbNodes ));
4369 const SMDS_MeshNode* nNext = f->GetNode( SMESH_MesherHelper::WrapIndex( srcInd+1, nbNodes ));
4370 const SMDS_MeshNode* nOpp = f->GetNode( SMESH_MesherHelper::WrapIndex( srcInd+2, nbNodes ));
4371 if ( dataToCheckOri && dataToCheckOri->_reversedFaceIds.count( shapeInd ))
4372 std::swap( nPrev, nNext );
4373 simplices.push_back( _Simplex( nPrev, nNext, ( nbNodes == 3 ? 0 : nOpp )));
4377 SortSimplices( simplices );
4380 //================================================================================
4382 * \brief Set neighbor simplices side by side
4384 //================================================================================
4386 void _Simplex::SortSimplices(vector<_Simplex>& simplices)
4388 vector<_Simplex> sortedSimplices( simplices.size() );
4389 sortedSimplices[0] = simplices[0];
4391 for ( size_t i = 1; i < simplices.size(); ++i )
4393 for ( size_t j = 1; j < simplices.size(); ++j )
4394 if ( sortedSimplices[i-1]._nNext == simplices[j]._nPrev )
4396 sortedSimplices[i] = simplices[j];
4401 if ( nbFound == simplices.size() - 1 )
4402 simplices.swap( sortedSimplices );
4405 //================================================================================
4407 * \brief DEBUG. Create groups containing temporary data of _LayerEdge's
4409 //================================================================================
4411 void _ViscousBuilder::makeGroupOfLE()
4414 for ( size_t i = 0 ; i < _sdVec.size(); ++i )
4416 if ( _sdVec[i]._n2eMap.empty() ) continue;
4418 dumpFunction( SMESH_Comment("make_LayerEdge_") << i );
4419 TNode2Edge::iterator n2e;
4420 for ( n2e = _sdVec[i]._n2eMap.begin(); n2e != _sdVec[i]._n2eMap.end(); ++n2e )
4422 _LayerEdge* le = n2e->second;
4423 // for ( size_t iN = 1; iN < le->_nodes.size(); ++iN )
4424 // dumpCmd(SMESH_Comment("mesh.AddEdge([ ") <<le->_nodes[iN-1]->GetID()
4425 // << ", " << le->_nodes[iN]->GetID() <<"])");
4427 dumpCmd(SMESH_Comment("mesh.AddEdge([ ") <<le->_nodes[0]->GetID()
4428 << ", " << le->_nodes.back()->GetID() <<"]) # " << le->_flags );
4433 dumpFunction( SMESH_Comment("makeNormals") << i );
4434 for ( n2e = _sdVec[i]._n2eMap.begin(); n2e != _sdVec[i]._n2eMap.end(); ++n2e )
4436 _LayerEdge* edge = n2e->second;
4437 SMESH_TNodeXYZ nXYZ( edge->_nodes[0] );
4438 nXYZ += edge->_normal * _sdVec[i]._stepSize;
4439 dumpCmd(SMESH_Comment("mesh.AddEdge([ ") << edge->_nodes[0]->GetID()
4440 << ", mesh.AddNode( "<< nXYZ.X()<<","<< nXYZ.Y()<<","<< nXYZ.Z()<<")])");
4444 dumpFunction( SMESH_Comment("makeTmpFaces_") << i );
4445 dumpCmd( "faceId1 = mesh.NbElements()" );
4446 TopExp_Explorer fExp( _sdVec[i]._solid, TopAbs_FACE );
4447 for ( ; fExp.More(); fExp.Next() )
4449 if ( const SMESHDS_SubMesh* sm = _sdVec[i]._proxyMesh->GetProxySubMesh( fExp.Current() ))
4451 if ( sm->NbElements() == 0 ) continue;
4452 SMDS_ElemIteratorPtr fIt = sm->GetElements();
4453 while ( fIt->more())
4455 const SMDS_MeshElement* e = fIt->next();
4456 SMESH_Comment cmd("mesh.AddFace([");
4457 for ( int j = 0; j < e->NbCornerNodes(); ++j )
4458 cmd << e->GetNode(j)->GetID() << (j+1 < e->NbCornerNodes() ? ",": "])");
4463 dumpCmd( "faceId2 = mesh.NbElements()" );
4464 dumpCmd( SMESH_Comment( "mesh.MakeGroup( 'tmpFaces_" ) << i << "',"
4465 << "SMESH.FACE, SMESH.FT_RangeOfIds,'=',"
4466 << "'%s-%s' % (faceId1+1, faceId2))");
4472 //================================================================================
4474 * \brief Find maximal _LayerEdge length (layer thickness) limited by geometry
4476 //================================================================================
4478 void _ViscousBuilder::computeGeomSize( _SolidData& data )
4480 data._geomSize = Precision::Infinite();
4481 double intersecDist;
4482 const SMDS_MeshElement* face;
4483 SMESH_MesherHelper helper( *_mesh );
4485 SMESHUtils::Deleter<SMESH_ElementSearcher> searcher
4486 ( SMESH_MeshAlgos::GetElementSearcher( *getMeshDS(),
4487 data._proxyMesh->GetFaces( data._solid )));
4489 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
4491 _EdgesOnShape& eos = data._edgesOnShape[ iS ];
4492 if ( eos._edges.empty() )
4494 // get neighbor faces, intersection with which should not be considered since
4495 // collisions are avoided by means of smoothing
4496 set< TGeomID > neighborFaces;
4497 if ( eos._hyp.ToSmooth() )
4499 SMESH_subMeshIteratorPtr subIt =
4500 eos._subMesh->getDependsOnIterator(/*includeSelf=*/eos.ShapeType() != TopAbs_FACE );
4501 while ( subIt->more() )
4503 SMESH_subMesh* sm = subIt->next();
4504 PShapeIteratorPtr fIt = helper.GetAncestors( sm->GetSubShape(), *_mesh, TopAbs_FACE );
4505 while ( const TopoDS_Shape* face = fIt->next() )
4506 neighborFaces.insert( getMeshDS()->ShapeToIndex( *face ));
4509 // find intersections
4510 double thinkness = eos._hyp.GetTotalThickness();
4511 for ( size_t i = 0; i < eos._edges.size(); ++i )
4513 if ( eos._edges[i]->Is( _LayerEdge::BLOCKED )) continue;
4514 eos._edges[i]->SetMaxLen( thinkness );
4515 eos._edges[i]->FindIntersection( *searcher, intersecDist, data._epsilon, eos, &face );
4516 if ( intersecDist > 0 && face )
4518 data._geomSize = Min( data._geomSize, intersecDist );
4519 if ( !neighborFaces.count( face->getshapeId() ))
4520 eos[i]->SetMaxLen( Min( thinkness, intersecDist / ( face->GetID() < 0 ? 3. : 2. )));
4525 data._maxThickness = 0;
4526 data._minThickness = 1e100;
4527 list< const StdMeshers_ViscousLayers* >::iterator hyp = data._hyps.begin();
4528 for ( ; hyp != data._hyps.end(); ++hyp )
4530 data._maxThickness = Max( data._maxThickness, (*hyp)->GetTotalThickness() );
4531 data._minThickness = Min( data._minThickness, (*hyp)->GetTotalThickness() );
4534 // Limit inflation step size by geometry size found by intersecting
4535 // normals of _LayerEdge's with mesh faces
4536 if ( data._stepSize > 0.3 * data._geomSize )
4537 limitStepSize( data, 0.3 * data._geomSize );
4539 if ( data._stepSize > data._minThickness )
4540 limitStepSize( data, data._minThickness );
4543 // -------------------------------------------------------------------------
4544 // Detect _LayerEdge which can't intersect with opposite or neighbor layer,
4545 // so no need in detecting intersection at each inflation step
4546 // -------------------------------------------------------------------------
4548 int nbSteps = data._maxThickness / data._stepSize;
4549 if ( nbSteps < 3 || nbSteps * data._n2eMap.size() < 100000 )
4552 vector< const SMDS_MeshElement* > closeFaces;
4555 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
4557 _EdgesOnShape& eos = data._edgesOnShape[ iS ];
4558 if ( eos._edges.empty() || eos.ShapeType() != TopAbs_FACE )
4561 for ( size_t i = 0; i < eos.size(); ++i )
4563 SMESH_NodeXYZ p( eos[i]->_nodes[0] );
4564 double radius = data._maxThickness + 2 * eos[i]->_maxLen;
4566 searcher->GetElementsInSphere( p, radius, SMDSAbs_Face, closeFaces );
4568 bool toIgnore = true;
4569 for ( size_t iF = 0; iF < closeFaces.size() && toIgnore; ++iF )
4570 if ( !( toIgnore = ( closeFaces[ iF ]->getshapeId() == eos._shapeID ||
4571 data._ignoreFaceIds.count( closeFaces[ iF ]->getshapeId() ))))
4573 // check if a _LayerEdge will inflate in a direction opposite to a direction
4574 // toward a close face
4575 bool allBehind = true;
4576 for ( int iN = 0; iN < closeFaces[ iF ]->NbCornerNodes() && allBehind; ++iN )
4578 SMESH_NodeXYZ pi( closeFaces[ iF ]->GetNode( iN ));
4579 allBehind = (( pi - p ) * eos[i]->_normal < 0.1 * data._stepSize );
4581 toIgnore = allBehind;
4585 if ( toIgnore ) // no need to detect intersection
4587 eos[i]->Set( _LayerEdge::INTERSECTED );
4593 debugMsg( "Nb LE to intersect " << data._n2eMap.size()-nbDetected << ", ignore " << nbDetected );
4598 //================================================================================
4600 * \brief Increase length of _LayerEdge's to reach the required thickness of layers
4602 //================================================================================
4604 bool _ViscousBuilder::inflate(_SolidData& data)
4606 SMESH_MesherHelper helper( *_mesh );
4608 const double tgtThick = data._maxThickness;
4610 if ( data._stepSize < 1. )
4611 data._epsilon = data._stepSize * 1e-7;
4613 debugMsg( "-- geomSize = " << data._geomSize << ", stepSize = " << data._stepSize );
4616 findCollisionEdges( data, helper );
4618 limitMaxLenByCurvature( data, helper );
4622 // limit length of _LayerEdge's around MULTI_NORMAL _LayerEdge's
4623 for ( size_t i = 0; i < data._edgesOnShape.size(); ++i )
4624 if ( data._edgesOnShape[i].ShapeType() == TopAbs_VERTEX &&
4625 data._edgesOnShape[i]._edges.size() > 0 &&
4626 data._edgesOnShape[i]._edges[0]->Is( _LayerEdge::MULTI_NORMAL ))
4628 data._edgesOnShape[i]._edges[0]->Unset( _LayerEdge::BLOCKED );
4629 data._edgesOnShape[i]._edges[0]->Block( data );
4632 const double safeFactor = ( 2*data._maxThickness < data._geomSize ) ? 1 : theThickToIntersection;
4634 double avgThick = 0, curThick = 0, distToIntersection = Precision::Infinite();
4635 int nbSteps = 0, nbRepeats = 0;
4636 while ( avgThick < 0.99 )
4638 // new target length
4639 double prevThick = curThick;
4640 curThick += data._stepSize;
4641 if ( curThick > tgtThick )
4643 curThick = tgtThick + tgtThick*( 1.-avgThick ) * nbRepeats;
4647 double stepSize = curThick - prevThick;
4648 updateNormalsOfSmoothed( data, helper, nbSteps, stepSize ); // to ease smoothing
4650 // Elongate _LayerEdge's
4651 dumpFunction(SMESH_Comment("inflate")<<data._index<<"_step"<<nbSteps); // debug
4652 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
4654 _EdgesOnShape& eos = data._edgesOnShape[iS];
4655 if ( eos._edges.empty() ) continue;
4657 const double shapeCurThick = Min( curThick, eos._hyp.GetTotalThickness() );
4658 for ( size_t i = 0; i < eos._edges.size(); ++i )
4660 eos._edges[i]->SetNewLength( shapeCurThick, eos, helper );
4665 if ( !updateNormals( data, helper, nbSteps, stepSize )) // to avoid collisions
4668 // Improve and check quality
4669 if ( !smoothAndCheck( data, nbSteps, distToIntersection ))
4673 #ifdef __NOT_INVALIDATE_BAD_SMOOTH
4674 debugMsg("NOT INVALIDATED STEP!");
4675 return error("Smoothing failed", data._index);
4677 dumpFunction(SMESH_Comment("invalidate")<<data._index<<"_step"<<nbSteps); // debug
4678 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
4680 _EdgesOnShape& eos = data._edgesOnShape[iS];
4681 for ( size_t i = 0; i < eos._edges.size(); ++i )
4682 eos._edges[i]->InvalidateStep( nbSteps+1, eos );
4686 break; // no more inflating possible
4690 // Evaluate achieved thickness
4692 int nbActiveEdges = 0;
4693 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
4695 _EdgesOnShape& eos = data._edgesOnShape[iS];
4696 if ( eos._edges.empty() ) continue;
4698 const double shapeTgtThick = eos._hyp.GetTotalThickness();
4699 for ( size_t i = 0; i < eos._edges.size(); ++i )
4701 if ( eos._edges[i]->_nodes.size() > 1 )
4702 avgThick += Min( 1., eos._edges[i]->_len / shapeTgtThick );
4704 avgThick += shapeTgtThick;
4705 nbActiveEdges += ( ! eos._edges[i]->Is( _LayerEdge::BLOCKED ));
4708 avgThick /= data._n2eMap.size();
4709 debugMsg( "-- Thickness " << curThick << " ("<< avgThick*100 << "%) reached" );
4711 #ifdef BLOCK_INFLATION
4712 if ( nbActiveEdges == 0 )
4714 debugMsg( "-- Stop inflation since all _LayerEdge's BLOCKED " );
4718 if ( distToIntersection < tgtThick * avgThick * safeFactor && avgThick < 0.9 )
4720 debugMsg( "-- Stop inflation since "
4721 << " distToIntersection( "<<distToIntersection<<" ) < avgThick( "
4722 << tgtThick * avgThick << " ) * " << safeFactor );
4728 limitStepSize( data, 0.25 * distToIntersection );
4729 if ( data._stepSizeNodes[0] )
4730 data._stepSize = data._stepSizeCoeff *
4731 SMESH_TNodeXYZ(data._stepSizeNodes[0]).Distance(data._stepSizeNodes[1]);
4733 } // while ( avgThick < 0.99 )
4736 return error("failed at the very first inflation step", data._index);
4738 if ( avgThick < 0.99 )
4740 if ( !data._proxyMesh->_warning || data._proxyMesh->_warning->IsOK() )
4742 data._proxyMesh->_warning.reset
4743 ( new SMESH_ComputeError (COMPERR_WARNING,
4744 SMESH_Comment("Thickness ") << tgtThick <<
4745 " of viscous layers not reached,"
4746 " average reached thickness is " << avgThick*tgtThick));
4750 // Restore position of src nodes moved by inflation on _noShrinkShapes
4751 dumpFunction(SMESH_Comment("restoNoShrink_So")<<data._index); // debug
4752 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
4754 _EdgesOnShape& eos = data._edgesOnShape[iS];
4755 if ( !eos._edges.empty() && eos._edges[0]->_nodes.size() == 1 )
4756 for ( size_t i = 0; i < eos._edges.size(); ++i )
4758 restoreNoShrink( *eos._edges[ i ] );
4763 return safeFactor > 0; // == true (avoid warning: unused variable 'safeFactor')
4766 //================================================================================
4768 * \brief Improve quality of layer inner surface and check intersection
4770 //================================================================================
4772 bool _ViscousBuilder::smoothAndCheck(_SolidData& data,
4774 double & distToIntersection)
4776 if ( data._nbShapesToSmooth == 0 )
4777 return true; // no shapes needing smoothing
4779 bool moved, improved;
4781 vector< _LayerEdge* > movedEdges, badEdges;
4782 vector< _EdgesOnShape* > eosC1; // C1 continues shapes
4783 vector< bool > isConcaveFace;
4785 SMESH_MesherHelper helper(*_mesh);
4786 Handle(ShapeAnalysis_Surface) surface;
4789 for ( int isFace = 0; isFace < 2; ++isFace ) // smooth on [ EDGEs, FACEs ]
4791 const TopAbs_ShapeEnum shapeType = isFace ? TopAbs_FACE : TopAbs_EDGE;
4793 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
4795 _EdgesOnShape& eos = data._edgesOnShape[ iS ];
4796 if ( !eos._toSmooth ||
4797 eos.ShapeType() != shapeType ||
4798 eos._edges.empty() )
4801 // already smoothed?
4802 // bool toSmooth = ( eos._edges[ 0 ]->NbSteps() >= infStep+1 );
4803 // if ( !toSmooth ) continue;
4805 if ( !eos._hyp.ToSmooth() )
4807 // smooth disabled by the user; check validy only
4808 if ( !isFace ) continue;
4810 for ( size_t i = 0; i < eos._edges.size(); ++i )
4812 _LayerEdge* edge = eos._edges[i];
4813 for ( size_t iF = 0; iF < edge->_simplices.size(); ++iF )
4814 if ( !edge->_simplices[iF].IsForward( edge->_nodes[0], edge->_pos.back(), vol ))
4816 // debugMsg( "-- Stop inflation. Bad simplex ("
4817 // << " "<< edge->_nodes[0]->GetID()
4818 // << " "<< edge->_nodes.back()->GetID()
4819 // << " "<< edge->_simplices[iF]._nPrev->GetID()
4820 // << " "<< edge->_simplices[iF]._nNext->GetID() << " ) ");
4822 badEdges.push_back( edge );
4825 if ( !badEdges.empty() )
4829 int nbBad = invalidateBadSmooth( data, helper, badEdges, eosC1, infStep );
4833 continue; // goto the next EDGE or FACE
4837 if ( eos.SWOLType() == TopAbs_FACE )
4839 if ( !F.IsSame( eos._sWOL )) {
4840 F = TopoDS::Face( eos._sWOL );
4841 helper.SetSubShape( F );
4842 surface = helper.GetSurface( F );
4847 F.Nullify(); surface.Nullify();
4849 const TGeomID sInd = eos._shapeID;
4851 // perform smoothing
4853 if ( eos.ShapeType() == TopAbs_EDGE )
4855 dumpFunction(SMESH_Comment("smooth")<<data._index << "_Ed"<<sInd <<"_InfStep"<<infStep);
4857 if ( !eos._edgeSmoother->Perform( data, surface, F, helper ))
4859 // smooth on EDGE's (normally we should not get here)
4863 for ( size_t i = 0; i < eos._edges.size(); ++i )
4865 moved |= eos._edges[i]->SmoothOnEdge( surface, F, helper );
4867 dumpCmd( SMESH_Comment("# end step ")<<step);
4869 while ( moved && step++ < 5 );
4874 else // smooth on FACE
4877 eosC1.push_back( & eos );
4878 eosC1.insert( eosC1.end(), eos._eosC1.begin(), eos._eosC1.end() );
4881 isConcaveFace.resize( eosC1.size() );
4882 for ( size_t iEOS = 0; iEOS < eosC1.size(); ++iEOS )
4884 isConcaveFace[ iEOS ] = data._concaveFaces.count( eosC1[ iEOS ]->_shapeID );
4885 vector< _LayerEdge* > & edges = eosC1[ iEOS ]->_edges;
4886 for ( size_t i = 0; i < edges.size(); ++i )
4887 if ( edges[i]->Is( _LayerEdge::MOVED ) ||
4888 edges[i]->Is( _LayerEdge::NEAR_BOUNDARY ))
4889 movedEdges.push_back( edges[i] );
4891 makeOffsetSurface( *eosC1[ iEOS ], helper );
4894 int step = 0, stepLimit = 5, nbBad = 0;
4895 while (( ++step <= stepLimit ) || improved )
4897 dumpFunction(SMESH_Comment("smooth")<<data._index<<"_Fa"<<sInd
4898 <<"_InfStep"<<infStep<<"_"<<step); // debug
4899 int oldBadNb = nbBad;
4902 #ifdef INCREMENTAL_SMOOTH
4903 bool findBest = false; // ( step == stepLimit );
4904 for ( size_t i = 0; i < movedEdges.size(); ++i )
4906 movedEdges[i]->Unset( _LayerEdge::SMOOTHED );
4907 if ( movedEdges[i]->Smooth( step, findBest, movedEdges ) > 0 )
4908 badEdges.push_back( movedEdges[i] );
4911 bool findBest = ( step == stepLimit || isConcaveFace[ iEOS ]);
4912 for ( size_t iEOS = 0; iEOS < eosC1.size(); ++iEOS )
4914 vector< _LayerEdge* > & edges = eosC1[ iEOS ]->_edges;
4915 for ( size_t i = 0; i < edges.size(); ++i )
4917 edges[i]->Unset( _LayerEdge::SMOOTHED );
4918 if ( edges[i]->Smooth( step, findBest, false ) > 0 )
4919 badEdges.push_back( eos._edges[i] );
4923 nbBad = badEdges.size();
4926 debugMsg(SMESH_Comment("nbBad = ") << nbBad );
4928 if ( !badEdges.empty() && step >= stepLimit / 2 )
4930 if ( badEdges[0]->Is( _LayerEdge::ON_CONCAVE_FACE ))
4933 // resolve hard smoothing situation around concave VERTEXes
4934 for ( size_t iEOS = 0; iEOS < eosC1.size(); ++iEOS )
4936 vector< _EdgesOnShape* > & eosCoVe = eosC1[ iEOS ]->_eosConcaVer;
4937 for ( size_t i = 0; i < eosCoVe.size(); ++i )
4938 eosCoVe[i]->_edges[0]->MoveNearConcaVer( eosCoVe[i], eosC1[ iEOS ],
4941 // look for the best smooth of _LayerEdge's neighboring badEdges
4943 for ( size_t i = 0; i < badEdges.size(); ++i )
4945 _LayerEdge* ledge = badEdges[i];
4946 for ( size_t iN = 0; iN < ledge->_neibors.size(); ++iN )
4948 ledge->_neibors[iN]->Unset( _LayerEdge::SMOOTHED );
4949 nbBad += ledge->_neibors[iN]->Smooth( step, true, /*findBest=*/true );
4951 ledge->Unset( _LayerEdge::SMOOTHED );
4952 nbBad += ledge->Smooth( step, true, /*findBest=*/true );
4954 debugMsg(SMESH_Comment("nbBad = ") << nbBad );
4957 if ( nbBad == oldBadNb &&
4959 step < stepLimit ) // smooth w/o check of validity
4962 dumpFunction(SMESH_Comment("smoothWoCheck")<<data._index<<"_Fa"<<sInd
4963 <<"_InfStep"<<infStep<<"_"<<step); // debug
4964 for ( size_t i = 0; i < movedEdges.size(); ++i )
4966 movedEdges[i]->SmoothWoCheck();
4968 if ( stepLimit < 9 )
4972 improved = ( nbBad < oldBadNb );
4976 if (( step % 3 == 1 ) || ( nbBad > 0 && step >= stepLimit / 2 ))
4977 for ( size_t iEOS = 0; iEOS < eosC1.size(); ++iEOS )
4979 putOnOffsetSurface( *eosC1[ iEOS ], infStep, eosC1, step, /*moveAll=*/step == 1 );
4982 } // smoothing steps
4984 // project -- to prevent intersections or fix bad simplices
4985 for ( size_t iEOS = 0; iEOS < eosC1.size(); ++iEOS )
4987 if ( ! eosC1[ iEOS ]->_eosConcaVer.empty() || nbBad > 0 )
4988 putOnOffsetSurface( *eosC1[ iEOS ], infStep, eosC1 );
4991 //if ( !badEdges.empty() )
4994 for ( size_t iEOS = 0; iEOS < eosC1.size(); ++iEOS )
4996 for ( size_t i = 0; i < eosC1[ iEOS ]->_edges.size(); ++i )
4998 if ( !eosC1[ iEOS ]->_sWOL.IsNull() ) continue;
5000 _LayerEdge* edge = eosC1[ iEOS ]->_edges[i];
5001 edge->CheckNeiborsOnBoundary( & badEdges );
5002 if (( nbBad > 0 ) ||
5003 ( edge->Is( _LayerEdge::BLOCKED ) && edge->Is( _LayerEdge::NEAR_BOUNDARY )))
5005 SMESH_TNodeXYZ tgtXYZ = edge->_nodes.back();
5006 gp_XYZ prevXYZ = edge->PrevCheckPos();
5007 for ( size_t j = 0; j < edge->_simplices.size(); ++j )
5008 if ( !edge->_simplices[j].IsForward( &prevXYZ, &tgtXYZ, vol ))
5010 debugMsg("Bad simplex ( " << edge->_nodes[0]->GetID()
5011 << " "<< tgtXYZ._node->GetID()
5012 << " "<< edge->_simplices[j]._nPrev->GetID()
5013 << " "<< edge->_simplices[j]._nNext->GetID() << " )" );
5014 badEdges.push_back( edge );
5021 // try to fix bad simplices by removing the last inflation step of some _LayerEdge's
5022 nbBad = invalidateBadSmooth( data, helper, badEdges, eosC1, infStep );
5028 } // // smooth on FACE's
5030 } // smooth on [ EDGEs, FACEs ]
5032 // Check orientation of simplices of _LayerEdge's on EDGEs and VERTEXes
5034 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
5036 _EdgesOnShape& eos = data._edgesOnShape[ iS ];
5037 if ( eos.ShapeType() == TopAbs_FACE ||
5038 eos._edges.empty() ||
5039 !eos._sWOL.IsNull() )
5043 for ( size_t i = 0; i < eos._edges.size(); ++i )
5045 _LayerEdge* edge = eos._edges[i];
5046 if ( edge->_nodes.size() < 2 ) continue;
5047 SMESH_TNodeXYZ tgtXYZ = edge->_nodes.back();
5048 //SMESH_TNodeXYZ prevXYZ = edge->_nodes[0];
5049 gp_XYZ prevXYZ = edge->PrevCheckPos( &eos );
5050 //const gp_XYZ& prevXYZ = edge->PrevPos();
5051 for ( size_t j = 0; j < edge->_simplices.size(); ++j )
5052 if ( !edge->_simplices[j].IsForward( &prevXYZ, &tgtXYZ, vol ))
5054 debugMsg("Bad simplex on bnd ( " << edge->_nodes[0]->GetID()
5055 << " "<< tgtXYZ._node->GetID()
5056 << " "<< edge->_simplices[j]._nPrev->GetID()
5057 << " "<< edge->_simplices[j]._nNext->GetID() << " )" );
5058 badEdges.push_back( edge );
5063 // try to fix bad simplices by removing the last inflation step of some _LayerEdge's
5065 int nbBad = invalidateBadSmooth( data, helper, badEdges, eosC1, infStep );
5071 // Check if the last segments of _LayerEdge intersects 2D elements;
5072 // checked elements are either temporary faces or faces on surfaces w/o the layers
5074 SMESHUtils::Deleter<SMESH_ElementSearcher> searcher
5075 ( SMESH_MeshAlgos::GetElementSearcher( *getMeshDS(),
5076 data._proxyMesh->GetFaces( data._solid )) );
5078 #ifdef BLOCK_INFLATION
5079 const bool toBlockInfaltion = true;
5081 const bool toBlockInfaltion = false;
5083 distToIntersection = Precision::Infinite();
5085 const SMDS_MeshElement* intFace = 0;
5086 const SMDS_MeshElement* closestFace = 0;
5088 bool is1stBlocked = true; // dbg
5089 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
5091 _EdgesOnShape& eos = data._edgesOnShape[ iS ];
5092 if ( eos._edges.empty() || !eos._sWOL.IsNull() )
5094 for ( size_t i = 0; i < eos._edges.size(); ++i )
5096 if ( eos._edges[i]->Is( _LayerEdge::INTERSECTED ) ||
5097 eos._edges[i]->Is( _LayerEdge::MULTI_NORMAL ))
5099 if ( eos._edges[i]->FindIntersection( *searcher, dist, data._epsilon, eos, &intFace ))
5102 // commented due to "Illegal hash-positionPosition" error in NETGEN
5103 // on Debian60 on viscous_layers_01/B2 case
5104 // Collision; try to deflate _LayerEdge's causing it
5105 // badEdges.clear();
5106 // badEdges.push_back( eos._edges[i] );
5107 // eosC1[0] = & eos;
5108 // int nbBad = invalidateBadSmooth( data, helper, badEdges, eosC1, infStep );
5112 // badEdges.clear();
5113 // if ( _EdgesOnShape* eof = data.GetShapeEdges( intFace->getshapeId() ))
5115 // if ( const _TmpMeshFace* f = dynamic_cast< const _TmpMeshFace*>( intFace ))
5117 // const SMDS_MeshElement* srcFace =
5118 // eof->_subMesh->GetSubMeshDS()->GetElement( f->getIdInShape() );
5119 // SMDS_ElemIteratorPtr nIt = srcFace->nodesIterator();
5120 // while ( nIt->more() )
5122 // const SMDS_MeshNode* srcNode = static_cast<const SMDS_MeshNode*>( nIt->next() );
5123 // TNode2Edge::iterator n2e = data._n2eMap.find( srcNode );
5124 // if ( n2e != data._n2eMap.end() )
5125 // badEdges.push_back( n2e->second );
5128 // nbBad = invalidateBadSmooth( data, helper, badEdges, eosC1, infStep );
5133 // if ( eos._edges[i]->FindIntersection( *searcher, dist, data._epsilon, eos, &intFace ))
5140 SMESH_Comment msg("Invalid? normal at node "); msg << eos._edges[i]->_nodes[0]->GetID();
5145 const bool isShorterDist = ( distToIntersection > dist );
5146 if ( toBlockInfaltion || isShorterDist )
5148 // ignore intersection of a _LayerEdge based on a _ConvexFace with a face
5149 // lying on this _ConvexFace
5150 if ( _ConvexFace* convFace = data.GetConvexFace( intFace->getshapeId() ))
5151 if ( convFace->_isTooCurved && convFace->_subIdToEOS.count ( eos._shapeID ))
5154 // ignore intersection of a _LayerEdge based on a FACE with an element on this FACE
5155 // ( avoid limiting the thickness on the case of issue 22576)
5156 if ( intFace->getshapeId() == eos._shapeID )
5159 // ignore intersection with intFace of an adjacent FACE
5160 if ( dist > 0.1 * eos._edges[i]->_len )
5162 bool toIgnore = false;
5163 if ( eos._toSmooth )
5165 const TopoDS_Shape& S = getMeshDS()->IndexToShape( intFace->getshapeId() );
5166 if ( !S.IsNull() && S.ShapeType() == TopAbs_FACE )
5168 TopExp_Explorer sub( eos._shape,
5169 eos.ShapeType() == TopAbs_FACE ? TopAbs_EDGE : TopAbs_VERTEX );
5170 for ( ; !toIgnore && sub.More(); sub.Next() )
5171 // is adjacent - has a common EDGE or VERTEX
5172 toIgnore = ( helper.IsSubShape( sub.Current(), S ));
5174 if ( toIgnore ) // check angle between normals
5177 if ( SMESH_MeshAlgos::FaceNormal( intFace, normal, /*normalized=*/true ))
5178 toIgnore = ( normal * eos._edges[i]->_normal > -0.5 );
5182 if ( !toIgnore ) // check if the edge is a neighbor of intFace
5184 for ( size_t iN = 0; !toIgnore && iN < eos._edges[i]->_neibors.size(); ++iN )
5186 int nInd = intFace->GetNodeIndex( eos._edges[i]->_neibors[ iN ]->_nodes.back() );
5187 toIgnore = ( nInd >= 0 );
5194 // intersection not ignored
5196 if ( toBlockInfaltion &&
5197 dist < ( eos._edges[i]->_len * theThickToIntersection ))
5199 if ( is1stBlocked ) { is1stBlocked = false; // debug
5200 dumpFunction(SMESH_Comment("blockIntersected") <<data._index<<"_InfStep"<<infStep);
5202 eos._edges[i]->Set( _LayerEdge::INTERSECTED ); // not to intersect
5203 eos._edges[i]->Block( data ); // not to inflate
5205 //if ( _EdgesOnShape* eof = data.GetShapeEdges( intFace->getshapeId() ))
5207 // block _LayerEdge's, on top of which intFace is
5208 if ( const _TmpMeshFace* f = dynamic_cast< const _TmpMeshFace*>( intFace ))
5210 const SMDS_MeshElement* srcFace = f->_srcFace;
5211 SMDS_ElemIteratorPtr nIt = srcFace->nodesIterator();
5212 while ( nIt->more() )
5214 const SMDS_MeshNode* srcNode = static_cast<const SMDS_MeshNode*>( nIt->next() );
5215 TNode2Edge::iterator n2e = data._n2eMap.find( srcNode );
5216 if ( n2e != data._n2eMap.end() )
5217 n2e->second->Block( data );
5223 if ( isShorterDist )
5225 distToIntersection = dist;
5227 closestFace = intFace;
5230 } // if ( toBlockInfaltion || isShorterDist )
5231 } // loop on eos._edges
5232 } // loop on data._edgesOnShape
5234 if ( !is1stBlocked )
5237 if ( closestFace && le )
5240 SMDS_MeshElement::iterator nIt = closestFace->begin_nodes();
5241 cout << "#Shortest distance: _LayerEdge nodes: tgt " << le->_nodes.back()->GetID()
5242 << " src " << le->_nodes[0]->GetID()<< ", intersection with face ("
5243 << (*nIt++)->GetID()<<" "<< (*nIt++)->GetID()<<" "<< (*nIt++)->GetID()
5244 << ") distance = " << distToIntersection<< endl;
5251 //================================================================================
5253 * \brief try to fix bad simplices by removing the last inflation step of some _LayerEdge's
5254 * \param [in,out] badSmooEdges - _LayerEdge's to fix
5255 * \return int - resulting nb of bad _LayerEdge's
5257 //================================================================================
5259 int _ViscousBuilder::invalidateBadSmooth( _SolidData& data,
5260 SMESH_MesherHelper& helper,
5261 vector< _LayerEdge* >& badSmooEdges,
5262 vector< _EdgesOnShape* >& eosC1,
5265 if ( badSmooEdges.empty() || infStep == 0 ) return 0;
5267 dumpFunction(SMESH_Comment("invalidateBadSmooth")<<"_S"<<eosC1[0]->_shapeID<<"_InfStep"<<infStep);
5270 INVALIDATED = _LayerEdge::UNUSED_FLAG,
5271 TO_INVALIDATE = _LayerEdge::UNUSED_FLAG * 2,
5272 ADDED = _LayerEdge::UNUSED_FLAG * 4
5274 data.UnmarkEdges( TO_INVALIDATE & INVALIDATED & ADDED );
5277 bool haveInvalidated = true;
5278 while ( haveInvalidated )
5280 haveInvalidated = false;
5281 for ( size_t i = 0; i < badSmooEdges.size(); ++i )
5283 _LayerEdge* edge = badSmooEdges[i];
5284 _EdgesOnShape* eos = data.GetShapeEdges( edge );
5286 bool invalidated = false;
5287 if ( edge->Is( TO_INVALIDATE ) && edge->NbSteps() > 1 )
5289 edge->InvalidateStep( edge->NbSteps(), *eos, /*restoreLength=*/true );
5290 edge->Block( data );
5291 edge->Set( INVALIDATED );
5292 edge->Unset( TO_INVALIDATE );
5294 haveInvalidated = true;
5297 // look for _LayerEdge's of bad _simplices
5299 SMESH_TNodeXYZ tgtXYZ = edge->_nodes.back();
5300 gp_XYZ prevXYZ1 = edge->PrevCheckPos( eos );
5301 //const gp_XYZ& prevXYZ2 = edge->PrevPos();
5302 for ( size_t j = 0; j < edge->_simplices.size(); ++j )
5304 if (( edge->_simplices[j].IsForward( &prevXYZ1, &tgtXYZ, vol ))/* &&
5305 ( &prevXYZ1 == &prevXYZ2 || edge->_simplices[j].IsForward( &prevXYZ2, &tgtXYZ, vol ))*/)
5309 _LayerEdge* ee[2] = { 0,0 };
5310 for ( size_t iN = 0; iN < edge->_neibors.size() && !ee[1] ; ++iN )
5311 if ( edge->_simplices[j].Includes( edge->_neibors[iN]->_nodes.back() ))
5312 ee[ ee[0] != 0 ] = edge->_neibors[iN];
5314 int maxNbSteps = Max( ee[0]->NbSteps(), ee[1]->NbSteps() );
5315 while ( maxNbSteps > edge->NbSteps() && isBad )
5318 for ( int iE = 0; iE < 2; ++iE )
5320 if ( ee[ iE ]->NbSteps() > maxNbSteps &&
5321 ee[ iE ]->NbSteps() > 1 )
5323 _EdgesOnShape* eos = data.GetShapeEdges( ee[ iE ] );
5324 ee[ iE ]->InvalidateStep( ee[ iE ]->NbSteps(), *eos, /*restoreLength=*/true );
5325 ee[ iE ]->Block( data );
5326 ee[ iE ]->Set( INVALIDATED );
5327 haveInvalidated = true;
5330 if (( edge->_simplices[j].IsForward( &prevXYZ1, &tgtXYZ, vol )) /*&&
5331 ( &prevXYZ1 == &prevXYZ2 || edge->_simplices[j].IsForward( &prevXYZ2, &tgtXYZ, vol ))*/)
5335 if ( !ee[0]->Is( ADDED )) badSmooEdges.push_back( ee[0] );
5336 if ( !ee[1]->Is( ADDED )) badSmooEdges.push_back( ee[1] );
5337 ee[0]->Set( ADDED );
5338 ee[1]->Set( ADDED );
5341 ee[0]->Set( TO_INVALIDATE );
5342 ee[1]->Set( TO_INVALIDATE );
5346 if ( !invalidated && nbBad > 0 && edge->NbSteps() > 1 )
5348 _EdgesOnShape* eos = data.GetShapeEdges( edge );
5349 edge->InvalidateStep( edge->NbSteps(), *eos, /*restoreLength=*/true );
5350 edge->Block( data );
5351 edge->Set( INVALIDATED );
5352 edge->Unset( TO_INVALIDATE );
5353 haveInvalidated = true;
5355 } // loop on badSmooEdges
5356 } // while ( haveInvalidated )
5358 // re-smooth on analytical EDGEs
5359 for ( size_t i = 0; i < badSmooEdges.size(); ++i )
5361 _LayerEdge* edge = badSmooEdges[i];
5362 if ( !edge->Is( INVALIDATED )) continue;
5364 _EdgesOnShape* eos = data.GetShapeEdges( edge );
5365 if ( eos->ShapeType() == TopAbs_VERTEX )
5367 PShapeIteratorPtr eIt = helper.GetAncestors( eos->_shape, *_mesh, TopAbs_EDGE );
5368 while ( const TopoDS_Shape* e = eIt->next() )
5369 if ( _EdgesOnShape* eoe = data.GetShapeEdges( *e ))
5370 if ( eoe->_edgeSmoother && eoe->_edgeSmoother->isAnalytic() )
5372 // TopoDS_Face F; Handle(ShapeAnalysis_Surface) surface;
5373 // if ( eoe->SWOLType() == TopAbs_FACE ) {
5374 // F = TopoDS::Face( eoe->_sWOL );
5375 // surface = helper.GetSurface( F );
5377 // eoe->_edgeSmoother->Perform( data, surface, F, helper );
5378 eoe->_edgeSmoother->_anaCurve.Nullify();
5384 // check result of invalidation
5387 for ( size_t iEOS = 0; iEOS < eosC1.size(); ++iEOS )
5389 for ( size_t i = 0; i < eosC1[ iEOS ]->_edges.size(); ++i )
5391 if ( !eosC1[ iEOS ]->_sWOL.IsNull() ) continue;
5392 _LayerEdge* edge = eosC1[ iEOS ]->_edges[i];
5393 SMESH_TNodeXYZ tgtXYZ = edge->_nodes.back();
5394 gp_XYZ prevXYZ = edge->PrevCheckPos( eosC1[ iEOS ]);
5395 for ( size_t j = 0; j < edge->_simplices.size(); ++j )
5396 if ( !edge->_simplices[j].IsForward( &prevXYZ, &tgtXYZ, vol ))
5399 debugMsg("Bad simplex remains ( " << edge->_nodes[0]->GetID()
5400 << " "<< tgtXYZ._node->GetID()
5401 << " "<< edge->_simplices[j]._nPrev->GetID()
5402 << " "<< edge->_simplices[j]._nNext->GetID() << " )" );
5411 //================================================================================
5413 * \brief Create an offset surface
5415 //================================================================================
5417 void _ViscousBuilder::makeOffsetSurface( _EdgesOnShape& eos, SMESH_MesherHelper& helper )
5419 if ( eos._offsetSurf.IsNull() ||
5420 eos._edgeForOffset == 0 ||
5421 eos._edgeForOffset->Is( _LayerEdge::BLOCKED ))
5424 Handle(ShapeAnalysis_Surface) baseSurface = helper.GetSurface( TopoDS::Face( eos._shape ));
5427 gp_Pnt tgtP = SMESH_TNodeXYZ( eos._edgeForOffset->_nodes.back() );
5428 /*gp_Pnt2d uv=*/baseSurface->ValueOfUV( tgtP, Precision::Confusion() );
5429 double offset = baseSurface->Gap();
5431 eos._offsetSurf.Nullify();
5435 BRepOffsetAPI_MakeOffsetShape offsetMaker;
5436 offsetMaker.PerformByJoin( eos._shape, -offset, Precision::Confusion() );
5437 if ( !offsetMaker.IsDone() ) return;
5439 TopExp_Explorer fExp( offsetMaker.Shape(), TopAbs_FACE );
5440 if ( !fExp.More() ) return;
5442 TopoDS_Face F = TopoDS::Face( fExp.Current() );
5443 Handle(Geom_Surface) surf = BRep_Tool::Surface( F );
5444 if ( surf.IsNull() ) return;
5446 eos._offsetSurf = new ShapeAnalysis_Surface( surf );
5448 catch ( Standard_Failure )
5453 //================================================================================
5455 * \brief Put nodes of a curved FACE to its offset surface
5457 //================================================================================
5459 void _ViscousBuilder::putOnOffsetSurface( _EdgesOnShape& eos,
5461 vector< _EdgesOnShape* >& eosC1,
5465 _EdgesOnShape * eof = & eos;
5466 if ( eos.ShapeType() != TopAbs_FACE ) // eos is a boundary of C1 FACE, look for the FACE eos
5469 for ( size_t i = 0; i < eosC1.size() && !eof; ++i )
5471 if ( eosC1[i]->_offsetSurf.IsNull() ||
5472 eosC1[i]->ShapeType() != TopAbs_FACE ||
5473 eosC1[i]->_edgeForOffset == 0 ||
5474 eosC1[i]->_edgeForOffset->Is( _LayerEdge::BLOCKED ))
5476 if ( SMESH_MesherHelper::IsSubShape( eos._shape, eosC1[i]->_shape ))
5481 eof->_offsetSurf.IsNull() ||
5482 eof->ShapeType() != TopAbs_FACE ||
5483 eof->_edgeForOffset == 0 ||
5484 eof->_edgeForOffset->Is( _LayerEdge::BLOCKED ))
5487 double preci = BRep_Tool::Tolerance( TopoDS::Face( eof->_shape )), vol;
5488 for ( size_t i = 0; i < eos._edges.size(); ++i )
5490 _LayerEdge* edge = eos._edges[i];
5491 edge->Unset( _LayerEdge::MARKED );
5492 if ( edge->Is( _LayerEdge::BLOCKED ) || !edge->_curvature )
5494 if ( moveAll == _LayerEdge::UPD_NORMAL_CONV )
5496 if ( !edge->Is( _LayerEdge::UPD_NORMAL_CONV ))
5499 else if ( !moveAll && !edge->Is( _LayerEdge::MOVED ))
5502 int nbBlockedAround = 0;
5503 for ( size_t iN = 0; iN < edge->_neibors.size(); ++iN )
5504 nbBlockedAround += edge->_neibors[iN]->Is( _LayerEdge::BLOCKED );
5505 if ( nbBlockedAround > 1 )
5508 gp_Pnt tgtP = SMESH_TNodeXYZ( edge->_nodes.back() );
5509 gp_Pnt2d uv = eof->_offsetSurf->NextValueOfUV( edge->_curvature->_uv, tgtP, preci );
5510 if ( eof->_offsetSurf->Gap() > edge->_len ) continue; // NextValueOfUV() bug
5511 edge->_curvature->_uv = uv;
5512 if ( eof->_offsetSurf->Gap() < 10 * preci ) continue; // same pos
5514 gp_XYZ newP = eof->_offsetSurf->Value( uv ).XYZ();
5515 gp_XYZ prevP = edge->PrevCheckPos();
5518 for ( size_t iS = 0; iS < edge->_simplices.size() && ok; ++iS )
5520 ok = edge->_simplices[iS].IsForward( &prevP, &newP, vol );
5524 SMDS_MeshNode* n = const_cast< SMDS_MeshNode* >( edge->_nodes.back() );
5525 n->setXYZ( newP.X(), newP.Y(), newP.Z());
5526 edge->_pos.back() = newP;
5528 edge->Set( _LayerEdge::MARKED );
5529 if ( moveAll == _LayerEdge::UPD_NORMAL_CONV )
5531 edge->_normal = ( newP - prevP ).Normalized();
5539 // dumpMove() for debug
5541 for ( ; i < eos._edges.size(); ++i )
5542 if ( eos._edges[i]->Is( _LayerEdge::MARKED ))
5544 if ( i < eos._edges.size() )
5546 dumpFunction(SMESH_Comment("putOnOffsetSurface_S") << eos._shapeID
5547 << "_InfStep" << infStep << "_" << smooStep );
5548 for ( ; i < eos._edges.size(); ++i )
5550 if ( eos._edges[i]->Is( _LayerEdge::MARKED ))
5551 dumpMove( eos._edges[i]->_nodes.back() );
5557 _ConvexFace* cnvFace;
5558 if ( moveAll != _LayerEdge::UPD_NORMAL_CONV &&
5559 eos.ShapeType() == TopAbs_FACE &&
5560 (cnvFace = eos.GetData().GetConvexFace( eos._shapeID )) &&
5561 !cnvFace->_normalsFixedOnBorders )
5563 // put on the surface nodes built on FACE boundaries
5564 SMESH_subMeshIteratorPtr smIt = eos._subMesh->getDependsOnIterator(/*includeSelf=*/false);
5565 while ( smIt->more() )
5567 SMESH_subMesh* sm = smIt->next();
5568 _EdgesOnShape* subEOS = eos.GetData().GetShapeEdges( sm->GetId() );
5569 if ( !subEOS->_sWOL.IsNull() ) continue;
5570 if ( std::find( eosC1.begin(), eosC1.end(), subEOS ) != eosC1.end() ) continue;
5572 putOnOffsetSurface( *subEOS, infStep, eosC1, smooStep, _LayerEdge::UPD_NORMAL_CONV );
5574 cnvFace->_normalsFixedOnBorders = true;
5578 //================================================================================
5580 * \brief Return a curve of the EDGE to be used for smoothing and arrange
5581 * _LayerEdge's to be in a consequent order
5583 //================================================================================
5585 Handle(Geom_Curve) _Smoother1D::CurveForSmooth( const TopoDS_Edge& E,
5587 SMESH_MesherHelper& helper)
5589 SMESHDS_SubMesh* smDS = eos._subMesh->GetSubMeshDS();
5591 TopLoc_Location loc; double f,l;
5593 Handle(Geom_Line) line;
5594 Handle(Geom_Circle) circle;
5595 bool isLine, isCirc;
5596 if ( eos._sWOL.IsNull() ) /////////////////////////////////////////// 3D case
5598 // check if the EDGE is a line
5599 Handle(Geom_Curve) curve = BRep_Tool::Curve( E, f, l);
5600 if ( curve->IsKind( STANDARD_TYPE( Geom_TrimmedCurve )))
5601 curve = Handle(Geom_TrimmedCurve)::DownCast( curve )->BasisCurve();
5603 line = Handle(Geom_Line)::DownCast( curve );
5604 circle = Handle(Geom_Circle)::DownCast( curve );
5605 isLine = (!line.IsNull());
5606 isCirc = (!circle.IsNull());
5608 if ( !isLine && !isCirc ) // Check if the EDGE is close to a line
5610 isLine = SMESH_Algo::IsStraight( E );
5613 line = new Geom_Line( gp::OX() ); // only type does matter
5615 if ( !isLine && !isCirc && eos._edges.size() > 2) // Check if the EDGE is close to a circle
5620 else //////////////////////////////////////////////////////////////////////// 2D case
5622 if ( !eos._isRegularSWOL ) // 23190
5625 const TopoDS_Face& F = TopoDS::Face( eos._sWOL );
5627 // check if the EDGE is a line
5628 Handle(Geom2d_Curve) curve = BRep_Tool::CurveOnSurface( E, F, f, l );
5629 if ( curve->IsKind( STANDARD_TYPE( Geom2d_TrimmedCurve )))
5630 curve = Handle(Geom2d_TrimmedCurve)::DownCast( curve )->BasisCurve();
5632 Handle(Geom2d_Line) line2d = Handle(Geom2d_Line)::DownCast( curve );
5633 Handle(Geom2d_Circle) circle2d = Handle(Geom2d_Circle)::DownCast( curve );
5634 isLine = (!line2d.IsNull());
5635 isCirc = (!circle2d.IsNull());
5637 if ( !isLine && !isCirc ) // Check if the EDGE is close to a line
5640 SMDS_NodeIteratorPtr nIt = smDS->GetNodes();
5641 while ( nIt->more() )
5642 bndBox.Add( helper.GetNodeUV( F, nIt->next() ));
5643 gp_XY size = bndBox.CornerMax() - bndBox.CornerMin();
5645 const double lineTol = 1e-2 * sqrt( bndBox.SquareExtent() );
5646 for ( int i = 0; i < 2 && !isLine; ++i )
5647 isLine = ( size.Coord( i+1 ) <= lineTol );
5649 if ( !isLine && !isCirc && eos._edges.size() > 2 ) // Check if the EDGE is close to a circle
5655 line = new Geom_Line( gp::OX() ); // only type does matter
5659 gp_Pnt2d p = circle2d->Location();
5660 gp_Ax2 ax( gp_Pnt( p.X(), p.Y(), 0), gp::DX());
5661 circle = new Geom_Circle( ax, 1.); // only center position does matter
5670 return Handle(Geom_Curve)();
5673 //================================================================================
5675 * \brief Smooth edges on EDGE
5677 //================================================================================
5679 bool _Smoother1D::Perform(_SolidData& data,
5680 Handle(ShapeAnalysis_Surface)& surface,
5681 const TopoDS_Face& F,
5682 SMESH_MesherHelper& helper )
5684 if ( _leParams.empty() || ( !isAnalytic() && _offPoints.empty() ))
5687 findEdgesToSmooth();
5689 return smoothAnalyticEdge( data, surface, F, helper );
5691 return smoothComplexEdge ( data, surface, F, helper );
5694 //================================================================================
5696 * \brief Find edges to smooth
5698 //================================================================================
5700 void _Smoother1D::findEdgesToSmooth()
5702 _LayerEdge* leOnV[2] = { getLEdgeOnV(0), getLEdgeOnV(1) };
5703 for ( int iEnd = 0; iEnd < 2; ++iEnd )
5704 if ( leOnV[iEnd]->Is( _LayerEdge::NORMAL_UPDATED ))
5705 _leOnV[iEnd]._cosin = Abs( _edgeDir[iEnd].Normalized() * leOnV[iEnd]->_normal );
5707 _eToSmooth[0].first = _eToSmooth[0].second = 0;
5709 for ( size_t i = 0; i < _eos.size(); ++i )
5711 if ( !_eos[i]->Is( _LayerEdge::TO_SMOOTH ))
5713 if ( needSmoothing( _leOnV[0]._cosin,
5714 _eos[i]->_len * leOnV[0]->_lenFactor, _curveLen * _leParams[i] ) ||
5717 _eos[i]->Set( _LayerEdge::TO_SMOOTH );
5721 _eToSmooth[0].second = i+1;
5724 _eToSmooth[1].first = _eToSmooth[1].second = _eos.size();
5726 for ( int i = _eos.size() - 1; i >= _eToSmooth[0].second; --i )
5728 if ( !_eos[i]->Is( _LayerEdge::TO_SMOOTH ))
5730 if ( needSmoothing( _leOnV[1]._cosin,
5731 _eos[i]->_len * leOnV[1]->_lenFactor, _curveLen * ( 1.-_leParams[i] )) ||
5733 _eos[i]->Set( _LayerEdge::TO_SMOOTH );
5737 _eToSmooth[1].first = i;
5741 //================================================================================
5743 * \brief Check if iE-th _LayerEdge needs smoothing
5745 //================================================================================
5747 bool _Smoother1D::isToSmooth( int iE )
5749 SMESH_NodeXYZ pi( _eos[iE]->_nodes[0] );
5750 SMESH_NodeXYZ p0( _eos[iE]->_2neibors->srcNode(0) );
5751 SMESH_NodeXYZ p1( _eos[iE]->_2neibors->srcNode(1) );
5752 gp_XYZ seg0 = pi - p0;
5753 gp_XYZ seg1 = p1 - pi;
5754 gp_XYZ tangent = seg0 + seg1;
5755 double tangentLen = tangent.Modulus();
5756 double segMinLen = Min( seg0.Modulus(), seg1.Modulus() );
5757 if ( tangentLen < std::numeric_limits<double>::min() )
5759 tangent /= tangentLen;
5761 for ( size_t i = 0; i < _eos[iE]->_neibors.size(); ++i )
5763 _LayerEdge* ne = _eos[iE]->_neibors[i];
5764 if ( !ne->Is( _LayerEdge::TO_SMOOTH ) ||
5765 ne->_nodes.size() < 2 ||
5766 ne->_nodes[0]->GetPosition()->GetDim() != 2 )
5768 gp_XYZ edgeVec = SMESH_NodeXYZ( ne->_nodes.back() ) - SMESH_NodeXYZ( ne->_nodes[0] );
5769 double proj = edgeVec * tangent;
5770 if ( needSmoothing( 1., proj, segMinLen ))
5776 //================================================================================
5778 * \brief smooth _LayerEdge's on a staight EDGE or circular EDGE
5780 //================================================================================
5782 bool _Smoother1D::smoothAnalyticEdge( _SolidData& data,
5783 Handle(ShapeAnalysis_Surface)& surface,
5784 const TopoDS_Face& F,
5785 SMESH_MesherHelper& helper)
5787 if ( !isAnalytic() ) return false;
5789 size_t iFrom = 0, iTo = _eos._edges.size();
5791 if ( _anaCurve->IsKind( STANDARD_TYPE( Geom_Line )))
5793 if ( F.IsNull() ) // 3D
5795 SMESH_TNodeXYZ pSrc0( _eos._edges[iFrom]->_2neibors->srcNode(0) );
5796 SMESH_TNodeXYZ pSrc1( _eos._edges[iTo-1]->_2neibors->srcNode(1) );
5797 //const gp_XYZ lineDir = pSrc1 - pSrc0;
5798 //_LayerEdge* vLE0 = getLEdgeOnV( 0 );
5799 //_LayerEdge* vLE1 = getLEdgeOnV( 1 );
5800 // bool shiftOnly = ( vLE0->Is( _LayerEdge::NORMAL_UPDATED ) ||
5801 // vLE0->Is( _LayerEdge::BLOCKED ) ||
5802 // vLE1->Is( _LayerEdge::NORMAL_UPDATED ) ||
5803 // vLE1->Is( _LayerEdge::BLOCKED ));
5804 for ( int iEnd = 0; iEnd < 2; ++iEnd )
5806 iFrom = _eToSmooth[ iEnd ].first, iTo = _eToSmooth[ iEnd ].second;
5807 if ( iFrom >= iTo ) continue;
5808 SMESH_TNodeXYZ p0( _eos[iFrom]->_2neibors->tgtNode(0) );
5809 SMESH_TNodeXYZ p1( _eos[iTo-1]->_2neibors->tgtNode(1) );
5810 double param0 = ( iFrom == 0 ) ? 0. : _leParams[ iFrom-1 ];
5811 double param1 = _leParams[ iTo ];
5812 for ( size_t i = iFrom; i < iTo; ++i )
5814 _LayerEdge* edge = _eos[i];
5815 SMDS_MeshNode* tgtNode = const_cast<SMDS_MeshNode*>( edge->_nodes.back() );
5816 double param = ( _leParams[i] - param0 ) / ( param1 - param0 );
5817 gp_XYZ newPos = p0 * ( 1. - param ) + p1 * param;
5819 // if ( shiftOnly || edge->Is( _LayerEdge::NORMAL_UPDATED ))
5821 // gp_XYZ curPos = SMESH_TNodeXYZ ( tgtNode );
5822 // double shift = ( lineDir * ( newPos - pSrc0 ) -
5823 // lineDir * ( curPos - pSrc0 ));
5824 // newPos = curPos + lineDir * shift / lineDir.SquareModulus();
5826 if ( edge->Is( _LayerEdge::BLOCKED ))
5828 SMESH_TNodeXYZ pSrc( edge->_nodes[0] );
5829 double curThick = pSrc.SquareDistance( tgtNode );
5830 double newThink = ( pSrc - newPos ).SquareModulus();
5831 if ( newThink > curThick )
5834 edge->_pos.back() = newPos;
5835 tgtNode->setXYZ( newPos.X(), newPos.Y(), newPos.Z() );
5836 dumpMove( tgtNode );
5842 _LayerEdge* eV0 = getLEdgeOnV( 0 );
5843 _LayerEdge* eV1 = getLEdgeOnV( 1 );
5844 gp_XY uvV0 = eV0->LastUV( F, *data.GetShapeEdges( eV0 ));
5845 gp_XY uvV1 = eV1->LastUV( F, *data.GetShapeEdges( eV1 ));
5846 if ( eV0->_nodes.back() == eV1->_nodes.back() ) // closed edge
5848 int iPeriodic = helper.GetPeriodicIndex();
5849 if ( iPeriodic == 1 || iPeriodic == 2 )
5851 uvV1.SetCoord( iPeriodic, helper.GetOtherParam( uvV1.Coord( iPeriodic )));
5852 if ( uvV0.Coord( iPeriodic ) > uvV1.Coord( iPeriodic ))
5853 std::swap( uvV0, uvV1 );
5856 for ( int iEnd = 0; iEnd < 2; ++iEnd )
5858 iFrom = _eToSmooth[ iEnd ].first, iTo = _eToSmooth[ iEnd ].second;
5859 if ( iFrom >= iTo ) continue;
5860 _LayerEdge* e0 = _eos[iFrom]->_2neibors->_edges[0];
5861 _LayerEdge* e1 = _eos[iTo-1]->_2neibors->_edges[1];
5862 gp_XY uv0 = ( e0 == eV0 ) ? uvV0 : e0->LastUV( F, _eos );
5863 gp_XY uv1 = ( e1 == eV1 ) ? uvV1 : e1->LastUV( F, _eos );
5864 double param0 = ( iFrom == 0 ) ? 0. : _leParams[ iFrom-1 ];
5865 double param1 = _leParams[ iTo ];
5866 gp_XY rangeUV = uv1 - uv0;
5867 for ( size_t i = iFrom; i < iTo; ++i )
5869 if ( _eos[i]->Is( _LayerEdge::BLOCKED )) continue;
5870 double param = ( _leParams[i] - param0 ) / ( param1 - param0 );
5871 gp_XY newUV = uv0 + param * rangeUV;
5873 gp_Pnt newPos = surface->Value( newUV.X(), newUV.Y() );
5874 SMDS_MeshNode* tgtNode = const_cast<SMDS_MeshNode*>( _eos[i]->_nodes.back() );
5875 tgtNode->setXYZ( newPos.X(), newPos.Y(), newPos.Z() );
5876 dumpMove( tgtNode );
5878 SMDS_FacePositionPtr pos = tgtNode->GetPosition();
5879 pos->SetUParameter( newUV.X() );
5880 pos->SetVParameter( newUV.Y() );
5882 gp_XYZ newUV0( newUV.X(), newUV.Y(), 0 );
5884 if ( !_eos[i]->Is( _LayerEdge::SMOOTHED ))
5886 _eos[i]->Set( _LayerEdge::SMOOTHED ); // to check in refine() (IPAL54237)
5887 if ( _eos[i]->_pos.size() > 2 )
5889 // modify previous positions to make _LayerEdge less sharply bent
5890 vector<gp_XYZ>& uvVec = _eos[i]->_pos;
5891 const gp_XYZ uvShift = newUV0 - uvVec.back();
5892 const double len2 = ( uvVec.back() - uvVec[ 0 ] ).SquareModulus();
5893 int iPrev = uvVec.size() - 2;
5896 double r = ( uvVec[ iPrev ] - uvVec[0] ).SquareModulus() / len2;
5897 uvVec[ iPrev ] += uvShift * r;
5902 _eos[i]->_pos.back() = newUV0;
5909 if ( _anaCurve->IsKind( STANDARD_TYPE( Geom_Circle )))
5911 Handle(Geom_Circle) circle = Handle(Geom_Circle)::DownCast( _anaCurve );
5912 gp_Pnt center3D = circle->Location();
5914 if ( F.IsNull() ) // 3D
5916 if ( getLEdgeOnV( 0 )->_nodes.back() == getLEdgeOnV( 1 )->_nodes.back() )
5917 return true; // closed EDGE - nothing to do
5919 // circle is a real curve of EDGE
5920 gp_Circ circ = circle->Circ();
5922 // new center is shifted along its axis
5923 const gp_Dir& axis = circ.Axis().Direction();
5924 _LayerEdge* e0 = getLEdgeOnV(0);
5925 _LayerEdge* e1 = getLEdgeOnV(1);
5926 SMESH_TNodeXYZ p0 = e0->_nodes.back();
5927 SMESH_TNodeXYZ p1 = e1->_nodes.back();
5928 double shift1 = axis.XYZ() * ( p0 - center3D.XYZ() );
5929 double shift2 = axis.XYZ() * ( p1 - center3D.XYZ() );
5930 gp_Pnt newCenter = center3D.XYZ() + axis.XYZ() * 0.5 * ( shift1 + shift2 );
5932 double newRadius = 0.5 * ( newCenter.Distance( p0 ) + newCenter.Distance( p1 ));
5934 gp_Ax2 newAxis( newCenter, axis, gp_Vec( newCenter, p0 ));
5935 gp_Circ newCirc( newAxis, newRadius );
5936 gp_Vec vecC1 ( newCenter, p1 );
5938 double uLast = newAxis.XDirection().AngleWithRef( vecC1, newAxis.Direction() ); // -PI - +PI
5942 for ( size_t i = 0; i < _eos.size(); ++i )
5944 if ( _eos[i]->Is( _LayerEdge::BLOCKED )) continue;
5945 //if ( !_eos[i]->Is( _LayerEdge::TO_SMOOTH )) continue;
5946 double u = uLast * _leParams[i];
5947 gp_Pnt p = ElCLib::Value( u, newCirc );
5948 _eos._edges[i]->_pos.back() = p.XYZ();
5950 SMDS_MeshNode* tgtNode = const_cast<SMDS_MeshNode*>( _eos._edges[i]->_nodes.back() );
5951 tgtNode->setXYZ( p.X(), p.Y(), p.Z() );
5952 dumpMove( tgtNode );
5958 const gp_XY center( center3D.X(), center3D.Y() );
5960 _LayerEdge* e0 = getLEdgeOnV(0);
5961 _LayerEdge* eM = _eos._edges[ 0 ];
5962 _LayerEdge* e1 = getLEdgeOnV(1);
5963 gp_XY uv0 = e0->LastUV( F, *data.GetShapeEdges( e0 ) );
5964 gp_XY uvM = eM->LastUV( F, *data.GetShapeEdges( eM ) );
5965 gp_XY uv1 = e1->LastUV( F, *data.GetShapeEdges( e1 ) );
5966 gp_Vec2d vec0( center, uv0 );
5967 gp_Vec2d vecM( center, uvM );
5968 gp_Vec2d vec1( center, uv1 );
5969 double uLast = vec0.Angle( vec1 ); // -PI - +PI
5970 double uMidl = vec0.Angle( vecM );
5971 if ( uLast * uMidl <= 0. )
5972 uLast += ( uMidl > 0 ? +2. : -2. ) * M_PI;
5973 const double radius = 0.5 * ( vec0.Magnitude() + vec1.Magnitude() );
5975 gp_Ax2d axis( center, vec0 );
5976 gp_Circ2d circ( axis, radius );
5977 for ( size_t i = 0; i < _eos.size(); ++i )
5979 if ( _eos[i]->Is( _LayerEdge::BLOCKED )) continue;
5980 //if ( !_eos[i]->Is( _LayerEdge::TO_SMOOTH )) continue;
5981 double newU = uLast * _leParams[i];
5982 gp_Pnt2d newUV = ElCLib::Value( newU, circ );
5983 _eos._edges[i]->_pos.back().SetCoord( newUV.X(), newUV.Y(), 0 );
5985 gp_Pnt newPos = surface->Value( newUV.X(), newUV.Y() );
5986 SMDS_MeshNode* tgtNode = const_cast<SMDS_MeshNode*>( _eos._edges[i]->_nodes.back() );
5987 tgtNode->setXYZ( newPos.X(), newPos.Y(), newPos.Z() );
5988 dumpMove( tgtNode );
5990 SMDS_FacePositionPtr pos = tgtNode->GetPosition();
5991 pos->SetUParameter( newUV.X() );
5992 pos->SetVParameter( newUV.Y() );
5994 _eos[i]->Set( _LayerEdge::SMOOTHED ); // to check in refine() (IPAL54237)
6003 //================================================================================
6005 * \brief smooth _LayerEdge's on a an EDGE
6007 //================================================================================
6009 bool _Smoother1D::smoothComplexEdge( _SolidData& data,
6010 Handle(ShapeAnalysis_Surface)& surface,
6011 const TopoDS_Face& F,
6012 SMESH_MesherHelper& helper)
6014 if ( _offPoints.empty() )
6017 // ----------------------------------------------
6018 // move _offPoints along normals of _LayerEdge's
6019 // ----------------------------------------------
6021 _LayerEdge* e[2] = { getLEdgeOnV(0), getLEdgeOnV(1) };
6022 if ( e[0]->Is( _LayerEdge::NORMAL_UPDATED ))
6023 _leOnV[0]._normal = getNormalNormal( e[0]->_normal, _edgeDir[0] );
6024 if ( e[1]->Is( _LayerEdge::NORMAL_UPDATED ))
6025 _leOnV[1]._normal = getNormalNormal( e[1]->_normal, _edgeDir[1] );
6026 _leOnV[0]._len = e[0]->_len;
6027 _leOnV[1]._len = e[1]->_len;
6028 for ( size_t i = 0; i < _offPoints.size(); i++ )
6030 _LayerEdge* e0 = _offPoints[i]._2edges._edges[0];
6031 _LayerEdge* e1 = _offPoints[i]._2edges._edges[1];
6032 const double w0 = _offPoints[i]._2edges._wgt[0];
6033 const double w1 = _offPoints[i]._2edges._wgt[1];
6034 gp_XYZ avgNorm = ( e0->_normal * w0 + e1->_normal * w1 ).Normalized();
6035 double avgLen = ( e0->_len * w0 + e1->_len * w1 );
6036 double avgFact = ( e0->_lenFactor * w0 + e1->_lenFactor * w1 );
6037 if ( e0->Is( _LayerEdge::NORMAL_UPDATED ) ||
6038 e1->Is( _LayerEdge::NORMAL_UPDATED ))
6039 avgNorm = getNormalNormal( avgNorm, _offPoints[i]._edgeDir );
6041 _offPoints[i]._xyz += avgNorm * ( avgLen - _offPoints[i]._len ) * avgFact;
6042 _offPoints[i]._len = avgLen;
6046 if ( !surface.IsNull() ) // project _offPoints to the FACE
6048 fTol = 100 * BRep_Tool::Tolerance( F );
6049 //const double segLen = _offPoints[0].Distance( _offPoints[1] );
6051 gp_Pnt2d uv = surface->ValueOfUV( _offPoints[0]._xyz, fTol );
6052 //if ( surface->Gap() < 0.5 * segLen )
6053 _offPoints[0]._xyz = surface->Value( uv ).XYZ();
6055 for ( size_t i = 1; i < _offPoints.size(); ++i )
6057 uv = surface->NextValueOfUV( uv, _offPoints[i]._xyz, fTol );
6058 //if ( surface->Gap() < 0.5 * segLen )
6059 _offPoints[i]._xyz = surface->Value( uv ).XYZ();
6063 // -----------------------------------------------------------------
6064 // project tgt nodes of extreme _LayerEdge's to the offset segments
6065 // -----------------------------------------------------------------
6067 const int updatedOrBlocked = _LayerEdge::NORMAL_UPDATED | _LayerEdge::BLOCKED;
6068 if ( e[0]->Is( updatedOrBlocked )) _iSeg[0] = 0;
6069 if ( e[1]->Is( updatedOrBlocked )) _iSeg[1] = _offPoints.size()-2;
6071 gp_Pnt pExtreme[2], pProj[2];
6072 bool isProjected[2];
6073 for ( int is2nd = 0; is2nd < 2; ++is2nd )
6075 pExtreme[ is2nd ] = SMESH_TNodeXYZ( e[is2nd]->_nodes.back() );
6076 int i = _iSeg[ is2nd ];
6077 int di = is2nd ? -1 : +1;
6078 bool & projected = isProjected[ is2nd ];
6080 double uOnSeg, distMin = Precision::Infinite(), dist, distPrev = 0;
6083 gp_Vec v0p( _offPoints[i]._xyz, pExtreme[ is2nd ] );
6084 gp_Vec v01( _offPoints[i]._xyz, _offPoints[i+1]._xyz );
6085 uOnSeg = ( v0p * v01 ) / v01.SquareMagnitude(); // param [0,1] along v01
6086 projected = ( Abs( uOnSeg - 0.5 ) <= 0.5 );
6087 dist = pExtreme[ is2nd ].SquareDistance( _offPoints[ i + ( uOnSeg > 0.5 )]._xyz );
6088 if ( dist < distMin || projected )
6091 pProj[ is2nd ] = _offPoints[i]._xyz + ( v01 * uOnSeg ).XYZ();
6094 else if ( dist > distPrev )
6096 if ( ++nbWorse > 3 ) // avoid projection to the middle of a closed EDGE
6102 while ( !projected &&
6103 i >= 0 && i+1 < (int)_offPoints.size() );
6107 if (( is2nd && _iSeg[1] != _offPoints.size()-2 ) || ( !is2nd && _iSeg[0] != 0 ))
6110 _iSeg[1] = _offPoints.size()-2;
6111 debugMsg( "smoothComplexEdge() failed to project nodes of extreme _LayerEdge's" );
6116 if ( _iSeg[0] > _iSeg[1] )
6118 debugMsg( "smoothComplexEdge() incorrectly projected nodes of extreme _LayerEdge's" );
6122 // adjust length of extreme LE (test viscous_layers_01/B7)
6123 gp_Vec vDiv0( pExtreme[0], pProj[0] );
6124 gp_Vec vDiv1( pExtreme[1], pProj[1] );
6125 double d0 = vDiv0.Magnitude();
6126 double d1 = isProjected[1] ? vDiv1.Magnitude() : 0;
6127 if ( e[0]->Is( _LayerEdge::BLOCKED )) {
6128 if ( e[0]->_normal * vDiv0.XYZ() < 0 ) e[0]->_len += d0;
6129 else e[0]->_len -= d0;
6131 if ( e[1]->Is( _LayerEdge::BLOCKED )) {
6132 if ( e[1]->_normal * vDiv1.XYZ() < 0 ) e[1]->_len += d1;
6133 else e[1]->_len -= d1;
6136 // ---------------------------------------------------------------------------------
6137 // compute normalized length of the offset segments located between the projections
6138 // ---------------------------------------------------------------------------------
6140 // temporary replace extreme _offPoints by pExtreme
6141 gp_XYZ opXYZ[2] = { _offPoints[ _iSeg[0] ]._xyz,
6142 _offPoints[ _iSeg[1]+1 ]._xyz };
6143 _offPoints[ _iSeg[0] ]._xyz = pExtreme[0].XYZ();
6144 _offPoints[ _iSeg[1]+ 1]._xyz = pExtreme[1].XYZ();
6146 size_t iSeg = 0, nbSeg = _iSeg[1] - _iSeg[0] + 1;
6147 vector< double > len( nbSeg + 1 );
6149 len[ iSeg++ ] = pProj[ 0 ].Distance( _offPoints[ _iSeg[0]+1 ]._xyz );
6150 for ( size_t i = _iSeg[0]+1; i <= _iSeg[1]; ++i, ++iSeg )
6152 len[ iSeg ] = len[ iSeg-1 ] + _offPoints[i].Distance( _offPoints[i+1] );
6154 // if ( isProjected[ 1 ])
6155 // len[ nbSeg ] -= pProj[ 1 ].Distance( _offPoints[ _iSeg[1]+1 ]._xyz );
6157 // len[ nbSeg ] += pExtreme[ 1 ].Distance( _offPoints[ _iSeg[1]+1 ]._xyz );
6159 double fullLen = len.back() - d0 - d1;
6160 for ( iSeg = 0; iSeg < len.size(); ++iSeg )
6161 len[iSeg] = ( len[iSeg] - d0 ) / fullLen;
6163 // -------------------------------------------------------------
6164 // distribute tgt nodes of _LayerEdge's between the projections
6165 // -------------------------------------------------------------
6168 for ( size_t i = 0; i < _eos.size(); ++i )
6170 if ( _eos[i]->Is( _LayerEdge::BLOCKED )) continue;
6171 //if ( !_eos[i]->Is( _LayerEdge::TO_SMOOTH )) continue;
6172 while ( iSeg+2 < len.size() && _leParams[i] > len[ iSeg+1 ] )
6174 double r = ( _leParams[i] - len[ iSeg ]) / ( len[ iSeg+1 ] - len[ iSeg ]);
6175 gp_XYZ p = ( _offPoints[ iSeg + _iSeg[0] ]._xyz * ( 1 - r ) +
6176 _offPoints[ iSeg + _iSeg[0] + 1 ]._xyz * r );
6178 if ( surface.IsNull() )
6180 _eos[i]->_pos.back() = p;
6182 else // project a new node position to a FACE
6184 gp_Pnt2d uv ( _eos[i]->_pos.back().X(), _eos[i]->_pos.back().Y() );
6185 gp_Pnt2d uv2( surface->NextValueOfUV( uv, p, fTol ));
6187 p = surface->Value( uv2 ).XYZ();
6188 _eos[i]->_pos.back().SetCoord( uv2.X(), uv2.Y(), 0 );
6190 SMDS_MeshNode* tgtNode = const_cast<SMDS_MeshNode*>( _eos[i]->_nodes.back() );
6191 tgtNode->setXYZ( p.X(), p.Y(), p.Z() );
6192 dumpMove( tgtNode );
6195 _offPoints[ _iSeg[0] ]._xyz = opXYZ[0];
6196 _offPoints[ _iSeg[1]+1 ]._xyz = opXYZ[1];
6201 //================================================================================
6203 * \brief Prepare for smoothing
6205 //================================================================================
6207 void _Smoother1D::prepare(_SolidData& data)
6209 const TopoDS_Edge& E = TopoDS::Edge( _eos._shape );
6210 _curveLen = SMESH_Algo::EdgeLength( E );
6212 // sort _LayerEdge's by position on the EDGE
6213 data.SortOnEdge( E, _eos._edges );
6215 // compute normalized param of _eos._edges on EDGE
6216 _leParams.resize( _eos._edges.size() + 1 );
6219 gp_Pnt pPrev = SMESH_TNodeXYZ( getLEdgeOnV( 0 )->_nodes[0] );
6221 for ( size_t i = 0; i < _eos._edges.size(); ++i )
6223 gp_Pnt p = SMESH_TNodeXYZ( _eos._edges[i]->_nodes[0] );
6224 curLen = p.Distance( pPrev );
6225 _leParams[i+1] = _leParams[i] + curLen;
6228 double fullLen = _leParams.back() + pPrev.Distance( SMESH_TNodeXYZ( getLEdgeOnV(1)->_nodes[0]));
6229 for ( size_t i = 0; i < _leParams.size()-1; ++i )
6230 _leParams[i] = _leParams[i+1] / fullLen;
6231 _leParams.back() = 1.;
6234 _LayerEdge* leOnV[2] = { getLEdgeOnV(0), getLEdgeOnV(1) };
6236 // get cosin to use in findEdgesToSmooth()
6237 _edgeDir[0] = getEdgeDir( E, leOnV[0]->_nodes[0], data.GetHelper() );
6238 _edgeDir[1] = getEdgeDir( E, leOnV[1]->_nodes[0], data.GetHelper() );
6239 _leOnV[0]._cosin = Abs( leOnV[0]->_cosin );
6240 _leOnV[1]._cosin = Abs( leOnV[1]->_cosin );
6241 if ( _eos._sWOL.IsNull() ) // 3D
6242 for ( int iEnd = 0; iEnd < 2; ++iEnd )
6243 _leOnV[iEnd]._cosin = Abs( _edgeDir[iEnd].Normalized() * leOnV[iEnd]->_normal );
6248 // divide E to have offset segments with low deflection
6249 BRepAdaptor_Curve c3dAdaptor( E );
6250 const double curDeflect = 0.1; //0.01; // Curvature deflection == |p1p2]*sin(p1p2,p1pM)
6251 const double angDeflect = 0.1; //0.09; // Angular deflection == sin(p1pM,pMp2)
6252 GCPnts_TangentialDeflection discret(c3dAdaptor, angDeflect, curDeflect);
6253 if ( discret.NbPoints() <= 2 )
6255 _anaCurve = new Geom_Line( gp::OX() ); // only type does matter
6259 const double u0 = c3dAdaptor.FirstParameter();
6260 gp_Pnt p; gp_Vec tangent;
6261 if ( discret.NbPoints() >= (int) _eos.size() + 2 )
6263 _offPoints.resize( discret.NbPoints() );
6264 for ( size_t i = 0; i < _offPoints.size(); i++ )
6266 double u = discret.Parameter( i+1 );
6267 c3dAdaptor.D1( u, p, tangent );
6268 _offPoints[i]._xyz = p.XYZ();
6269 _offPoints[i]._edgeDir = tangent.XYZ();
6270 _offPoints[i]._param = GCPnts_AbscissaPoint::Length( c3dAdaptor, u0, u ) / _curveLen;
6275 std::vector< double > params( _eos.size() + 2 );
6277 params[0] = data.GetHelper().GetNodeU( E, leOnV[0]->_nodes[0] );
6278 params.back() = data.GetHelper().GetNodeU( E, leOnV[1]->_nodes[0] );
6279 for ( size_t i = 0; i < _eos.size(); i++ )
6280 params[i+1] = data.GetHelper().GetNodeU( E, _eos[i]->_nodes[0] );
6282 if ( params[1] > params[ _eos.size() ] )
6283 std::reverse( params.begin() + 1, params.end() - 1 );
6285 _offPoints.resize( _eos.size() + 2 );
6286 for ( size_t i = 0; i < _offPoints.size(); i++ )
6288 const double u = params[i];
6289 c3dAdaptor.D1( u, p, tangent );
6290 _offPoints[i]._xyz = p.XYZ();
6291 _offPoints[i]._edgeDir = tangent.XYZ();
6292 _offPoints[i]._param = GCPnts_AbscissaPoint::Length( c3dAdaptor, u0, u ) / _curveLen;
6297 _offPoints [0]._2edges.set( &_leOnV[0], &_leOnV[0], 0.5, 0.5 );
6298 _offPoints.back()._2edges.set( &_leOnV[1], &_leOnV[1], 0.5, 0.5 );
6299 _2NearEdges tmp2edges;
6300 tmp2edges._edges[1] = _eos._edges[0];
6301 _leOnV[0]._2neibors = & tmp2edges;
6302 _leOnV[0]._nodes = leOnV[0]->_nodes;
6303 _leOnV[1]._nodes = leOnV[1]->_nodes;
6304 _LayerEdge* eNext, *ePrev = & _leOnV[0];
6305 for ( size_t iLE = 0, i = 1; i < _offPoints.size()-1; i++ )
6307 // find _LayerEdge's located before and after an offset point
6308 // (_eos._edges[ iLE ] is next after ePrev)
6309 while ( iLE < _eos._edges.size() && _offPoints[i]._param > _leParams[ iLE ] )
6310 ePrev = _eos._edges[ iLE++ ];
6311 eNext = ePrev->_2neibors->_edges[1];
6313 gp_Pnt p0 = SMESH_TNodeXYZ( ePrev->_nodes[0] );
6314 gp_Pnt p1 = SMESH_TNodeXYZ( eNext->_nodes[0] );
6315 double r = p0.Distance( _offPoints[i]._xyz ) / p0.Distance( p1 );
6316 _offPoints[i]._2edges.set( ePrev, eNext, 1-r, r );
6319 // replace _LayerEdge's on VERTEX by _leOnV in _offPoints._2edges
6320 for ( size_t i = 0; i < _offPoints.size(); i++ )
6321 if ( _offPoints[i]._2edges._edges[0] == leOnV[0] )
6322 _offPoints[i]._2edges._edges[0] = & _leOnV[0];
6324 for ( size_t i = _offPoints.size()-1; i > 0; i-- )
6325 if ( _offPoints[i]._2edges._edges[1] == leOnV[1] )
6326 _offPoints[i]._2edges._edges[1] = & _leOnV[1];
6329 // set _normal of _leOnV[0] and _leOnV[1] to be normal to the EDGE
6331 int iLBO = _offPoints.size() - 2; // last but one
6333 if ( leOnV[ 0 ]->Is( _LayerEdge::MULTI_NORMAL ))
6334 _leOnV[ 0 ]._normal = getNormalNormal( _eos._edges[1]->_normal, _edgeDir[0] );
6336 _leOnV[ 0 ]._normal = getNormalNormal( leOnV[0]->_normal, _edgeDir[0] );
6337 if ( leOnV[ 1 ]->Is( _LayerEdge::MULTI_NORMAL ))
6338 _leOnV[ 1 ]._normal = getNormalNormal( _eos._edges.back()->_normal, _edgeDir[1] );
6340 _leOnV[ 1 ]._normal = getNormalNormal( leOnV[1]->_normal, _edgeDir[1] );
6341 _leOnV[ 0 ]._len = 0;
6342 _leOnV[ 1 ]._len = 0;
6343 _leOnV[ 0 ]._lenFactor = _offPoints[1 ]._2edges._edges[1]->_lenFactor;
6344 _leOnV[ 1 ]._lenFactor = _offPoints[iLBO]._2edges._edges[0]->_lenFactor;
6347 _iSeg[1] = _offPoints.size()-2;
6349 // initialize OffPnt::_len
6350 for ( size_t i = 0; i < _offPoints.size(); ++i )
6351 _offPoints[i]._len = 0;
6353 if ( _eos._edges[0]->NbSteps() > 1 ) // already inflated several times, init _xyz
6355 _leOnV[0]._len = leOnV[0]->_len;
6356 _leOnV[1]._len = leOnV[1]->_len;
6357 for ( size_t i = 0; i < _offPoints.size(); i++ )
6359 _LayerEdge* e0 = _offPoints[i]._2edges._edges[0];
6360 _LayerEdge* e1 = _offPoints[i]._2edges._edges[1];
6361 const double w0 = _offPoints[i]._2edges._wgt[0];
6362 const double w1 = _offPoints[i]._2edges._wgt[1];
6363 double avgLen = ( e0->_len * w0 + e1->_len * w1 );
6364 gp_XYZ avgXYZ = ( SMESH_TNodeXYZ( e0->_nodes.back() ) * w0 +
6365 SMESH_TNodeXYZ( e1->_nodes.back() ) * w1 );
6366 _offPoints[i]._xyz = avgXYZ;
6367 _offPoints[i]._len = avgLen;
6372 //================================================================================
6374 * \brief return _normal of _leOnV[is2nd] normal to the EDGE
6376 //================================================================================
6378 gp_XYZ _Smoother1D::getNormalNormal( const gp_XYZ & normal,
6379 const gp_XYZ& edgeDir)
6381 gp_XYZ cross = normal ^ edgeDir;
6382 gp_XYZ norm = edgeDir ^ cross;
6383 double size = norm.Modulus();
6385 // if ( size == 0 ) // MULTI_NORMAL _LayerEdge
6386 // return gp_XYZ( 1e-100, 1e-100, 1e-100 );
6391 //================================================================================
6393 * \brief Writes a script creating a mesh composed of _offPoints
6395 //================================================================================
6397 void _Smoother1D::offPointsToPython() const
6399 const char* fname = "/tmp/offPoints.py";
6400 cout << "execfile('"<<fname<<"')"<<endl;
6402 py << "import SMESH" << endl
6403 << "from salome.smesh import smeshBuilder" << endl
6404 << "smesh = smeshBuilder.New(salome.myStudy)" << endl
6405 << "mesh = smesh.Mesh( 'offPoints' )"<<endl;
6406 for ( size_t i = 0; i < _offPoints.size(); i++ )
6408 py << "mesh.AddNode( "
6409 << _offPoints[i]._xyz.X() << ", "
6410 << _offPoints[i]._xyz.Y() << ", "
6411 << _offPoints[i]._xyz.Z() << " )" << endl;
6415 //================================================================================
6417 * \brief Sort _LayerEdge's by a parameter on a given EDGE
6419 //================================================================================
6421 void _SolidData::SortOnEdge( const TopoDS_Edge& E,
6422 vector< _LayerEdge* >& edges)
6424 map< double, _LayerEdge* > u2edge;
6425 for ( size_t i = 0; i < edges.size(); ++i )
6426 u2edge.insert( u2edge.end(),
6427 make_pair( _helper->GetNodeU( E, edges[i]->_nodes[0] ), edges[i] ));
6429 ASSERT( u2edge.size() == edges.size() );
6430 map< double, _LayerEdge* >::iterator u2e = u2edge.begin();
6431 for ( size_t i = 0; i < edges.size(); ++i, ++u2e )
6432 edges[i] = u2e->second;
6434 Sort2NeiborsOnEdge( edges );
6437 //================================================================================
6439 * \brief Set _2neibors according to the order of _LayerEdge on EDGE
6441 //================================================================================
6443 void _SolidData::Sort2NeiborsOnEdge( vector< _LayerEdge* >& edges )
6445 if ( edges.size() < 2 || !edges[0]->_2neibors ) return;
6447 for ( size_t i = 0; i < edges.size()-1; ++i )
6448 if ( edges[i]->_2neibors->tgtNode(1) != edges[i+1]->_nodes.back() )
6449 edges[i]->_2neibors->reverse();
6451 const size_t iLast = edges.size() - 1;
6452 if ( edges.size() > 1 &&
6453 edges[iLast]->_2neibors->tgtNode(0) != edges[iLast-1]->_nodes.back() )
6454 edges[iLast]->_2neibors->reverse();
6457 //================================================================================
6459 * \brief Return _EdgesOnShape* corresponding to the shape
6461 //================================================================================
6463 _EdgesOnShape* _SolidData::GetShapeEdges(const TGeomID shapeID )
6465 if ( shapeID < (int)_edgesOnShape.size() &&
6466 _edgesOnShape[ shapeID ]._shapeID == shapeID )
6467 return _edgesOnShape[ shapeID ]._subMesh ? & _edgesOnShape[ shapeID ] : 0;
6469 for ( size_t i = 0; i < _edgesOnShape.size(); ++i )
6470 if ( _edgesOnShape[i]._shapeID == shapeID )
6471 return _edgesOnShape[i]._subMesh ? & _edgesOnShape[i] : 0;
6476 //================================================================================
6478 * \brief Return _EdgesOnShape* corresponding to the shape
6480 //================================================================================
6482 _EdgesOnShape* _SolidData::GetShapeEdges(const TopoDS_Shape& shape )
6484 SMESHDS_Mesh* meshDS = _proxyMesh->GetMesh()->GetMeshDS();
6485 return GetShapeEdges( meshDS->ShapeToIndex( shape ));
6488 //================================================================================
6490 * \brief Prepare data of the _LayerEdge for smoothing on FACE
6492 //================================================================================
6494 void _SolidData::PrepareEdgesToSmoothOnFace( _EdgesOnShape* eos, bool substituteSrcNodes )
6496 SMESH_MesherHelper helper( *_proxyMesh->GetMesh() );
6498 set< TGeomID > vertices;
6500 if ( eos->ShapeType() == TopAbs_FACE )
6502 // check FACE concavity and get concave VERTEXes
6503 F = TopoDS::Face( eos->_shape );
6504 if ( isConcave( F, helper, &vertices ))
6505 _concaveFaces.insert( eos->_shapeID );
6507 // set eos._eosConcaVer
6508 eos->_eosConcaVer.clear();
6509 eos->_eosConcaVer.reserve( vertices.size() );
6510 for ( set< TGeomID >::iterator v = vertices.begin(); v != vertices.end(); ++v )
6512 _EdgesOnShape* eov = GetShapeEdges( *v );
6513 if ( eov && eov->_edges.size() == 1 )
6515 eos->_eosConcaVer.push_back( eov );
6516 for ( size_t i = 0; i < eov->_edges[0]->_neibors.size(); ++i )
6517 eov->_edges[0]->_neibors[i]->Set( _LayerEdge::DIFFICULT );
6521 // SetSmooLen() to _LayerEdge's on FACE
6522 // for ( size_t i = 0; i < eos->_edges.size(); ++i )
6524 // eos->_edges[i]->SetSmooLen( Precision::Infinite() );
6526 // SMESH_subMeshIteratorPtr smIt = eos->_subMesh->getDependsOnIterator(/*includeSelf=*/false);
6527 // while ( smIt->more() ) // loop on sub-shapes of the FACE
6529 // _EdgesOnShape* eoe = GetShapeEdges( smIt->next()->GetId() );
6530 // if ( !eoe ) continue;
6532 // vector<_LayerEdge*>& eE = eoe->_edges;
6533 // for ( size_t iE = 0; iE < eE.size(); ++iE ) // loop on _LayerEdge's on EDGE or VERTEX
6535 // if ( eE[iE]->_cosin <= theMinSmoothCosin )
6538 // SMDS_ElemIteratorPtr segIt = eE[iE]->_nodes[0]->GetInverseElementIterator(SMDSAbs_Edge);
6539 // while ( segIt->more() )
6541 // const SMDS_MeshElement* seg = segIt->next();
6542 // if ( !eos->_subMesh->DependsOn( seg->getshapeId() ))
6544 // if ( seg->GetNode(0) != eE[iE]->_nodes[0] )
6545 // continue; // not to check a seg twice
6546 // for ( size_t iN = 0; iN < eE[iE]->_neibors.size(); ++iN )
6548 // _LayerEdge* eN = eE[iE]->_neibors[iN];
6549 // if ( eN->_nodes[0]->getshapeId() != eos->_shapeID )
6551 // double dist = SMESH_MeshAlgos::GetDistance( seg, SMESH_TNodeXYZ( eN->_nodes[0] ));
6552 // double smooLen = getSmoothingThickness( eE[iE]->_cosin, dist );
6553 // eN->SetSmooLen( Min( smooLen, eN->GetSmooLen() ));
6554 // eN->Set( _LayerEdge::NEAR_BOUNDARY );
6559 } // if ( eos->ShapeType() == TopAbs_FACE )
6561 for ( size_t i = 0; i < eos->_edges.size(); ++i )
6563 eos->_edges[i]->_smooFunction = 0;
6564 eos->_edges[i]->Set( _LayerEdge::TO_SMOOTH );
6566 bool isCurved = false;
6567 for ( size_t i = 0; i < eos->_edges.size(); ++i )
6569 _LayerEdge* edge = eos->_edges[i];
6571 // get simplices sorted
6572 _Simplex::SortSimplices( edge->_simplices );
6574 // smoothing function
6575 edge->ChooseSmooFunction( vertices, _n2eMap );
6578 double avgNormProj = 0, avgLen = 0;
6579 for ( size_t iS = 0; iS < edge->_simplices.size(); ++iS )
6581 _Simplex& s = edge->_simplices[iS];
6583 gp_XYZ vec = edge->_pos.back() - SMESH_TNodeXYZ( s._nPrev );
6584 avgNormProj += edge->_normal * vec;
6585 avgLen += vec.Modulus();
6586 if ( substituteSrcNodes )
6588 s._nNext = _n2eMap[ s._nNext ]->_nodes.back();
6589 s._nPrev = _n2eMap[ s._nPrev ]->_nodes.back();
6592 avgNormProj /= edge->_simplices.size();
6593 avgLen /= edge->_simplices.size();
6594 if (( edge->_curvature = _Curvature::New( avgNormProj, avgLen )))
6596 edge->Set( _LayerEdge::SMOOTHED_C1 );
6598 SMDS_FacePositionPtr fPos = edge->_nodes[0]->GetPosition();
6600 for ( size_t iS = 0; iS < edge->_simplices.size() && !fPos; ++iS )
6601 fPos = edge->_simplices[iS]._nPrev->GetPosition();
6603 edge->_curvature->_uv.SetCoord( fPos->GetUParameter(), fPos->GetVParameter() );
6607 // prepare for putOnOffsetSurface()
6608 if (( eos->ShapeType() == TopAbs_FACE ) &&
6609 ( isCurved || !eos->_eosConcaVer.empty() ))
6611 eos->_offsetSurf = helper.GetSurface( TopoDS::Face( eos->_shape ));
6612 eos->_edgeForOffset = 0;
6614 double maxCosin = -1;
6615 for ( TopExp_Explorer eExp( eos->_shape, TopAbs_EDGE ); eExp.More(); eExp.Next() )
6617 _EdgesOnShape* eoe = GetShapeEdges( eExp.Current() );
6618 if ( !eoe || eoe->_edges.empty() ) continue;
6620 vector<_LayerEdge*>& eE = eoe->_edges;
6621 _LayerEdge* e = eE[ eE.size() / 2 ];
6622 if ( e->_cosin > maxCosin )
6624 eos->_edgeForOffset = e;
6625 maxCosin = e->_cosin;
6631 //================================================================================
6633 * \brief Add faces for smoothing
6635 //================================================================================
6637 void _SolidData::AddShapesToSmooth( const set< _EdgesOnShape* >& eosToSmooth,
6638 const set< _EdgesOnShape* >* edgesNoAnaSmooth )
6640 set< _EdgesOnShape * >::const_iterator eos = eosToSmooth.begin();
6641 for ( ; eos != eosToSmooth.end(); ++eos )
6643 if ( !*eos || (*eos)->_toSmooth ) continue;
6645 (*eos)->_toSmooth = true;
6647 if ( (*eos)->ShapeType() == TopAbs_FACE )
6649 PrepareEdgesToSmoothOnFace( *eos, /*substituteSrcNodes=*/false );
6650 (*eos)->_toSmooth = true;
6654 // avoid _Smoother1D::smoothAnalyticEdge() of edgesNoAnaSmooth
6655 if ( edgesNoAnaSmooth )
6656 for ( eos = edgesNoAnaSmooth->begin(); eos != edgesNoAnaSmooth->end(); ++eos )
6658 if ( (*eos)->_edgeSmoother )
6659 (*eos)->_edgeSmoother->_anaCurve.Nullify();
6663 //================================================================================
6665 * \brief Limit _LayerEdge::_maxLen according to local curvature
6667 //================================================================================
6669 void _ViscousBuilder::limitMaxLenByCurvature( _SolidData& data, SMESH_MesherHelper& helper )
6671 // find intersection of neighbor _LayerEdge's to limit _maxLen
6672 // according to local curvature (IPAL52648)
6674 // This method must be called after findCollisionEdges() where _LayerEdge's
6675 // get _lenFactor initialized in the case of eos._hyp.IsOffsetMethod()
6677 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
6679 _EdgesOnShape& eosI = data._edgesOnShape[iS];
6680 if ( eosI._edges.empty() ) continue;
6681 if ( !eosI._hyp.ToSmooth() )
6683 for ( size_t i = 0; i < eosI._edges.size(); ++i )
6685 _LayerEdge* eI = eosI._edges[i];
6686 for ( size_t iN = 0; iN < eI->_neibors.size(); ++iN )
6688 _LayerEdge* eN = eI->_neibors[iN];
6689 if ( eI->_nodes[0]->GetID() < eN->_nodes[0]->GetID() ) // treat this pair once
6691 _EdgesOnShape* eosN = data.GetShapeEdges( eN );
6692 limitMaxLenByCurvature( eI, eN, eosI, *eosN, eosI._hyp.ToSmooth() );
6697 else if ( eosI.ShapeType() == TopAbs_EDGE )
6699 const TopoDS_Edge& E = TopoDS::Edge( eosI._shape );
6700 if ( SMESH_Algo::IsStraight( E, /*degenResult=*/true )) continue;
6702 _LayerEdge* e0 = eosI._edges[0];
6703 for ( size_t i = 1; i < eosI._edges.size(); ++i )
6705 _LayerEdge* eI = eosI._edges[i];
6706 limitMaxLenByCurvature( eI, e0, eosI, eosI, eosI._hyp.ToSmooth() );
6713 //================================================================================
6715 * \brief Limit _LayerEdge::_maxLen according to local curvature
6717 //================================================================================
6719 void _ViscousBuilder::limitMaxLenByCurvature( _LayerEdge* e1,
6721 _EdgesOnShape& eos1,
6722 _EdgesOnShape& eos2,
6723 const bool isSmoothable )
6725 if (( e1->_nodes[0]->GetPosition()->GetDim() !=
6726 e2->_nodes[0]->GetPosition()->GetDim() ) &&
6727 ( e1->_cosin < 0.75 ))
6728 return; // angle > 90 deg at e1
6730 gp_XYZ plnNorm = e1->_normal ^ e2->_normal;
6731 double norSize = plnNorm.SquareModulus();
6732 if ( norSize < std::numeric_limits<double>::min() )
6733 return; // parallel normals
6735 // find closest points of skew _LayerEdge's
6736 SMESH_TNodeXYZ src1( e1->_nodes[0] ), src2( e2->_nodes[0] );
6737 gp_XYZ dir12 = src2 - src1;
6738 gp_XYZ perp1 = e1->_normal ^ plnNorm;
6739 gp_XYZ perp2 = e2->_normal ^ plnNorm;
6740 double dot1 = perp2 * e1->_normal;
6741 double dot2 = perp1 * e2->_normal;
6742 double u1 = ( perp2 * dir12 ) / dot1;
6743 double u2 = - ( perp1 * dir12 ) / dot2;
6744 if ( u1 > 0 && u2 > 0 )
6746 double ovl = ( u1 * e1->_normal * dir12 -
6747 u2 * e2->_normal * dir12 ) / dir12.SquareModulus();
6748 if ( ovl > theSmoothThickToElemSizeRatio )
6750 const double coef = 0.75;
6751 e1->SetMaxLen( Min( e1->_maxLen, coef * u1 / e1->_lenFactor ));
6752 e2->SetMaxLen( Min( e2->_maxLen, coef * u2 / e2->_lenFactor ));
6757 //================================================================================
6759 * \brief Fill data._collisionEdges
6761 //================================================================================
6763 void _ViscousBuilder::findCollisionEdges( _SolidData& data, SMESH_MesherHelper& helper )
6765 data._collisionEdges.clear();
6767 // set the full thickness of the layers to LEs
6768 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
6770 _EdgesOnShape& eos = data._edgesOnShape[iS];
6771 if ( eos._edges.empty() ) continue;
6772 if ( eos.ShapeType() != TopAbs_EDGE && eos.ShapeType() != TopAbs_VERTEX ) continue;
6773 if ( !eos._sWOL.IsNull() ) continue; // PAL23566
6775 for ( size_t i = 0; i < eos._edges.size(); ++i )
6777 if ( eos._edges[i]->Is( _LayerEdge::BLOCKED )) continue;
6778 double maxLen = eos._edges[i]->_maxLen;
6779 eos._edges[i]->_maxLen = Precision::Infinite(); // avoid blocking
6780 eos._edges[i]->SetNewLength( 1.5 * maxLen, eos, helper );
6781 eos._edges[i]->_maxLen = maxLen;
6785 // make temporary quadrangles got by extrusion of
6786 // mesh edges along _LayerEdge._normal's
6788 vector< const SMDS_MeshElement* > tmpFaces;
6790 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
6792 _EdgesOnShape& eos = data._edgesOnShape[ iS ];
6793 if ( eos.ShapeType() != TopAbs_EDGE )
6795 if ( eos._edges.empty() )
6797 _LayerEdge* edge[2] = { 0, 0 }; // LE of 2 VERTEX'es
6798 SMESH_subMeshIteratorPtr smIt = eos._subMesh->getDependsOnIterator(/*includeSelf=*/false);
6799 while ( smIt->more() )
6800 if ( _EdgesOnShape* eov = data.GetShapeEdges( smIt->next()->GetId() ))
6801 if ( eov->_edges.size() == 1 )
6802 edge[ bool( edge[0]) ] = eov->_edges[0];
6806 _TmpMeshFaceOnEdge* f = new _TmpMeshFaceOnEdge( edge[0], edge[1], --_tmpFaceID );
6807 tmpFaces.push_back( f );
6810 for ( size_t i = 0; i < eos._edges.size(); ++i )
6812 _LayerEdge* edge = eos._edges[i];
6813 for ( int j = 0; j < 2; ++j ) // loop on _2NearEdges
6815 const SMDS_MeshNode* src2 = edge->_2neibors->srcNode(j);
6816 if ( src2->GetPosition()->GetDim() > 0 &&
6817 src2->GetID() < edge->_nodes[0]->GetID() )
6818 continue; // avoid using same segment twice
6820 // a _LayerEdge containing tgt2
6821 _LayerEdge* neiborEdge = edge->_2neibors->_edges[j];
6823 _TmpMeshFaceOnEdge* f = new _TmpMeshFaceOnEdge( edge, neiborEdge, --_tmpFaceID );
6824 tmpFaces.push_back( f );
6829 // Find _LayerEdge's intersecting tmpFaces.
6831 SMDS_ElemIteratorPtr fIt( new SMDS_ElementVectorIterator( tmpFaces.begin(),
6833 SMESHUtils::Deleter<SMESH_ElementSearcher> searcher
6834 ( SMESH_MeshAlgos::GetElementSearcher( *getMeshDS(), fIt ));
6836 double dist1, dist2, segLen, eps = 0.5;
6837 _CollisionEdges collEdges;
6838 vector< const SMDS_MeshElement* > suspectFaces;
6839 const double angle45 = Cos( 45. * M_PI / 180. );
6841 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
6843 _EdgesOnShape& eos = data._edgesOnShape[ iS ];
6844 if ( eos.ShapeType() == TopAbs_FACE || !eos._sWOL.IsNull() )
6846 // find sub-shapes whose VL can influence VL on eos
6847 set< TGeomID > neighborShapes;
6848 PShapeIteratorPtr fIt = helper.GetAncestors( eos._shape, *_mesh, TopAbs_FACE );
6849 while ( const TopoDS_Shape* face = fIt->next() )
6851 TGeomID faceID = getMeshDS()->ShapeToIndex( *face );
6852 if ( _EdgesOnShape* eof = data.GetShapeEdges( faceID ))
6854 SMESH_subMeshIteratorPtr subIt = eof->_subMesh->getDependsOnIterator(/*includeSelf=*/false);
6855 while ( subIt->more() )
6856 neighborShapes.insert( subIt->next()->GetId() );
6859 if ( eos.ShapeType() == TopAbs_VERTEX )
6861 PShapeIteratorPtr eIt = helper.GetAncestors( eos._shape, *_mesh, TopAbs_EDGE );
6862 while ( const TopoDS_Shape* edge = eIt->next() )
6863 neighborShapes.erase( getMeshDS()->ShapeToIndex( *edge ));
6865 // find intersecting _LayerEdge's
6866 for ( size_t i = 0; i < eos._edges.size(); ++i )
6868 if ( eos._edges[i]->Is( _LayerEdge::MULTI_NORMAL )) continue;
6869 _LayerEdge* edge = eos._edges[i];
6870 gp_Ax1 lastSegment = edge->LastSegment( segLen, eos );
6873 gp_Vec eSegDir0, eSegDir1;
6874 if ( edge->IsOnEdge() )
6876 SMESH_TNodeXYZ eP( edge->_nodes[0] );
6877 eSegDir0 = SMESH_TNodeXYZ( edge->_2neibors->srcNode(0) ) - eP;
6878 eSegDir1 = SMESH_TNodeXYZ( edge->_2neibors->srcNode(1) ) - eP;
6880 suspectFaces.clear();
6881 searcher->GetElementsInSphere( SMESH_TNodeXYZ( edge->_nodes.back()), edge->_len * 2,
6882 SMDSAbs_Face, suspectFaces );
6883 collEdges._intEdges.clear();
6884 for ( size_t j = 0 ; j < suspectFaces.size(); ++j )
6886 const _TmpMeshFaceOnEdge* f = (const _TmpMeshFaceOnEdge*) suspectFaces[j];
6887 if ( f->_le1 == edge || f->_le2 == edge ) continue;
6888 if ( !neighborShapes.count( f->_le1->_nodes[0]->getshapeId() )) continue;
6889 if ( !neighborShapes.count( f->_le2->_nodes[0]->getshapeId() )) continue;
6890 if ( edge->IsOnEdge() ) {
6891 if ( edge->_2neibors->include( f->_le1 ) ||
6892 edge->_2neibors->include( f->_le2 )) continue;
6895 if (( f->_le1->IsOnEdge() && f->_le1->_2neibors->include( edge )) ||
6896 ( f->_le2->IsOnEdge() && f->_le2->_2neibors->include( edge ))) continue;
6898 dist1 = dist2 = Precision::Infinite();
6899 if ( !edge->SegTriaInter( lastSegment, f->n(0), f->n(1), f->n(2), dist1, eps ))
6900 dist1 = Precision::Infinite();
6901 if ( !edge->SegTriaInter( lastSegment, f->n(3), f->n(2), f->n(0), dist2, eps ))
6902 dist2 = Precision::Infinite();
6903 if (( dist1 > segLen ) && ( dist2 > segLen ))
6906 if ( edge->IsOnEdge() )
6908 // skip perpendicular EDGEs
6909 gp_Vec fSegDir = SMESH_TNodeXYZ( f->n(0) ) - SMESH_TNodeXYZ( f->n(3) );
6910 bool isParallel = ( isLessAngle( eSegDir0, fSegDir, angle45 ) ||
6911 isLessAngle( eSegDir1, fSegDir, angle45 ) ||
6912 isLessAngle( eSegDir0, fSegDir.Reversed(), angle45 ) ||
6913 isLessAngle( eSegDir1, fSegDir.Reversed(), angle45 ));
6918 // either limit inflation of edges or remember them for updating _normal
6919 // double dot = edge->_normal * f->GetDir();
6922 collEdges._intEdges.push_back( f->_le1 );
6923 collEdges._intEdges.push_back( f->_le2 );
6927 // double shortLen = 0.75 * ( Min( dist1, dist2 ) / edge->_lenFactor );
6928 // edge->SetMaxLen( Min( shortLen, edge->_maxLen ));
6932 if ( !collEdges._intEdges.empty() )
6934 collEdges._edge = edge;
6935 data._collisionEdges.push_back( collEdges );
6940 for ( size_t i = 0 ; i < tmpFaces.size(); ++i )
6943 // restore the zero thickness
6944 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
6946 _EdgesOnShape& eos = data._edgesOnShape[iS];
6947 if ( eos._edges.empty() ) continue;
6948 if ( eos.ShapeType() != TopAbs_EDGE && eos.ShapeType() != TopAbs_VERTEX ) continue;
6950 for ( size_t i = 0; i < eos._edges.size(); ++i )
6952 eos._edges[i]->InvalidateStep( 1, eos );
6953 eos._edges[i]->_len = 0;
6958 //================================================================================
6960 * \brief Find _LayerEdge's located on boundary of a convex FACE whose normal
6961 * will be updated at each inflation step
6963 //================================================================================
6965 void _ViscousBuilder::findEdgesToUpdateNormalNearConvexFace( _ConvexFace & convFace,
6967 SMESH_MesherHelper& helper )
6969 const TGeomID convFaceID = getMeshDS()->ShapeToIndex( convFace._face );
6970 const double preci = BRep_Tool::Tolerance( convFace._face );
6971 Handle(ShapeAnalysis_Surface) surface = helper.GetSurface( convFace._face );
6973 bool edgesToUpdateFound = false;
6975 map< TGeomID, _EdgesOnShape* >::iterator id2eos = convFace._subIdToEOS.begin();
6976 for ( ; id2eos != convFace._subIdToEOS.end(); ++id2eos )
6978 _EdgesOnShape& eos = * id2eos->second;
6979 if ( !eos._sWOL.IsNull() ) continue;
6980 if ( !eos._hyp.ToSmooth() ) continue;
6981 for ( size_t i = 0; i < eos._edges.size(); ++i )
6983 _LayerEdge* ledge = eos._edges[ i ];
6984 if ( ledge->Is( _LayerEdge::UPD_NORMAL_CONV )) continue; // already checked
6985 if ( ledge->Is( _LayerEdge::MULTI_NORMAL )) continue; // not inflatable
6987 gp_XYZ tgtPos = ( SMESH_NodeXYZ( ledge->_nodes[0] ) +
6988 ledge->_normal * ledge->_lenFactor * ledge->_maxLen );
6990 // the normal must be updated if distance from tgtPos to surface is less than
6993 // find an initial UV for search of a projection of tgtPos to surface
6994 const SMDS_MeshNode* nodeInFace = 0;
6995 SMDS_ElemIteratorPtr fIt = ledge->_nodes[0]->GetInverseElementIterator(SMDSAbs_Face);
6996 while ( fIt->more() && !nodeInFace )
6998 const SMDS_MeshElement* f = fIt->next();
6999 if ( convFaceID != f->getshapeId() ) continue;
7001 SMDS_ElemIteratorPtr nIt = f->nodesIterator();
7002 while ( nIt->more() && !nodeInFace )
7004 const SMDS_MeshElement* n = nIt->next();
7005 if ( n->getshapeId() == convFaceID )
7006 nodeInFace = static_cast< const SMDS_MeshNode* >( n );
7011 gp_XY uv = helper.GetNodeUV( convFace._face, nodeInFace );
7014 surface->NextValueOfUV( uv, tgtPos, preci );
7015 double dist = surface->Gap();
7016 if ( dist < 0.95 * ledge->_maxLen )
7018 ledge->Set( _LayerEdge::UPD_NORMAL_CONV );
7019 if ( !ledge->_curvature ) ledge->_curvature = _Factory::NewCurvature();
7020 ledge->_curvature->_uv.SetCoord( uv.X(), uv.Y() );
7021 edgesToUpdateFound = true;
7026 if ( !convFace._isTooCurved && edgesToUpdateFound )
7028 data._convexFaces.insert( make_pair( convFaceID, convFace )).first->second;
7032 //================================================================================
7034 * \brief Modify normals of _LayerEdge's on EDGE's to avoid intersection with
7035 * _LayerEdge's on neighbor EDGE's
7037 //================================================================================
7039 bool _ViscousBuilder::updateNormals( _SolidData& data,
7040 SMESH_MesherHelper& helper,
7044 updateNormalsOfC1Vertices( data );
7046 if ( stepNb > 0 && !updateNormalsOfConvexFaces( data, helper, stepNb ))
7049 // map to store new _normal and _cosin for each intersected edge
7050 map< _LayerEdge*, _LayerEdge, _LayerEdgeCmp > edge2newEdge;
7051 map< _LayerEdge*, _LayerEdge, _LayerEdgeCmp >::iterator e2neIt;
7052 _LayerEdge zeroEdge;
7053 zeroEdge._normal.SetCoord( 0,0,0 );
7054 zeroEdge._maxLen = Precision::Infinite();
7055 zeroEdge._nodes.resize(1); // to init _TmpMeshFaceOnEdge
7057 set< _EdgesOnShape* > shapesToSmooth, edgesNoAnaSmooth;
7059 double segLen, dist1, dist2, dist;
7060 vector< pair< _LayerEdge*, double > > intEdgesDist;
7061 _TmpMeshFaceOnEdge quad( &zeroEdge, &zeroEdge, 0 );
7063 for ( int iter = 0; iter < 5; ++iter )
7065 edge2newEdge.clear();
7067 for ( size_t iE = 0; iE < data._collisionEdges.size(); ++iE )
7069 _CollisionEdges& ce = data._collisionEdges[iE];
7070 _LayerEdge* edge1 = ce._edge;
7071 if ( !edge1 /*|| edge1->Is( _LayerEdge::BLOCKED )*/) continue;
7072 _EdgesOnShape* eos1 = data.GetShapeEdges( edge1 );
7073 if ( !eos1 ) continue;
7075 // detect intersections
7076 gp_Ax1 lastSeg = edge1->LastSegment( segLen, *eos1 );
7077 double testLen = 1.5 * edge1->_maxLen * edge1->_lenFactor;
7079 intEdgesDist.clear();
7080 double minIntDist = Precision::Infinite();
7081 for ( size_t i = 0; i < ce._intEdges.size(); i += 2 )
7083 if ( edge1->Is( _LayerEdge::BLOCKED ) &&
7084 ce._intEdges[i ]->Is( _LayerEdge::BLOCKED ) &&
7085 ce._intEdges[i+1]->Is( _LayerEdge::BLOCKED ))
7087 double dot = edge1->_normal * quad.GetDir( ce._intEdges[i], ce._intEdges[i+1] );
7088 double fact = ( 1.1 + dot * dot );
7089 SMESH_TNodeXYZ pSrc0( ce.nSrc(i) ), pSrc1( ce.nSrc(i+1) );
7090 SMESH_TNodeXYZ pTgt0( ce.nTgt(i) ), pTgt1( ce.nTgt(i+1) );
7091 gp_XYZ pLast0 = pSrc0 + ( pTgt0 - pSrc0 ) * fact;
7092 gp_XYZ pLast1 = pSrc1 + ( pTgt1 - pSrc1 ) * fact;
7093 dist1 = dist2 = Precision::Infinite();
7094 if ( !edge1->SegTriaInter( lastSeg, pSrc0, pLast0, pSrc1, dist1, eps ) &&
7095 !edge1->SegTriaInter( lastSeg, pSrc1, pLast1, pLast0, dist2, eps ))
7098 if ( dist > testLen || dist <= 0 )
7101 if ( dist > testLen || dist <= 0 )
7104 // choose a closest edge
7105 gp_Pnt intP( lastSeg.Location().XYZ() + lastSeg.Direction().XYZ() * ( dist + segLen ));
7106 double d1 = intP.SquareDistance( pSrc0 );
7107 double d2 = intP.SquareDistance( pSrc1 );
7108 int iClose = i + ( d2 < d1 );
7109 _LayerEdge* edge2 = ce._intEdges[iClose];
7110 edge2->Unset( _LayerEdge::MARKED );
7112 // choose a closest edge among neighbors
7113 gp_Pnt srcP( SMESH_TNodeXYZ( edge1->_nodes[0] ));
7114 d1 = srcP.SquareDistance( SMESH_TNodeXYZ( edge2->_nodes[0] ));
7115 for ( size_t j = 0; j < intEdgesDist.size(); ++j )
7117 _LayerEdge * edgeJ = intEdgesDist[j].first;
7118 if ( edge2->IsNeiborOnEdge( edgeJ ))
7120 d2 = srcP.SquareDistance( SMESH_TNodeXYZ( edgeJ->_nodes[0] ));
7121 ( d1 < d2 ? edgeJ : edge2 )->Set( _LayerEdge::MARKED );
7124 intEdgesDist.push_back( make_pair( edge2, dist ));
7125 // if ( Abs( d2 - d1 ) / Max( d2, d1 ) < 0.5 )
7127 // iClose = i + !( d2 < d1 );
7128 // intEdges.push_back( ce._intEdges[iClose] );
7129 // ce._intEdges[iClose]->Unset( _LayerEdge::MARKED );
7131 minIntDist = Min( edge1->_len * edge1->_lenFactor - segLen + dist, minIntDist );
7136 // compute new _normals
7137 for ( size_t i = 0; i < intEdgesDist.size(); ++i )
7139 _LayerEdge* edge2 = intEdgesDist[i].first;
7140 double distWgt = edge1->_len / intEdgesDist[i].second;
7141 // if ( edge1->Is( _LayerEdge::BLOCKED ) &&
7142 // edge2->Is( _LayerEdge::BLOCKED )) continue;
7143 if ( edge2->Is( _LayerEdge::MARKED )) continue;
7144 edge2->Set( _LayerEdge::MARKED );
7147 gp_XYZ dir1 = edge1->_normal, dir2 = edge2->_normal;
7149 double cos1 = Abs( edge1->_cosin ), cos2 = Abs( edge2->_cosin );
7150 double wgt1 = ( cos1 + 0.001 ) / ( cos1 + cos2 + 0.002 );
7151 double wgt2 = ( cos2 + 0.001 ) / ( cos1 + cos2 + 0.002 );
7152 // double cos1 = Abs( edge1->_cosin ), cos2 = Abs( edge2->_cosin );
7153 // double sgn1 = 0.1 * ( 1 + edge1->_cosin ), sgn2 = 0.1 * ( 1 + edge2->_cosin );
7154 // double wgt1 = ( cos1 + sgn1 ) / ( cos1 + cos2 + sgn1 + sgn2 );
7155 // double wgt2 = ( cos2 + sgn2 ) / ( cos1 + cos2 + sgn1 + sgn2 );
7156 gp_XYZ newNormal = wgt1 * dir1 + wgt2 * dir2;
7157 newNormal.Normalize();
7161 double sgn1 = edge1->_cosin / cos1, sgn2 = edge2->_cosin / cos2;
7162 if ( cos1 < theMinSmoothCosin )
7164 newCos = cos2 * sgn1;
7166 else if ( cos2 > theMinSmoothCosin ) // both cos1 and cos2 > theMinSmoothCosin
7168 newCos = ( wgt1 * cos1 + wgt2 * cos2 ) * edge1->_cosin / cos1;
7172 newCos = edge1->_cosin;
7175 e2neIt = edge2newEdge.insert( make_pair( edge1, zeroEdge )).first;
7176 e2neIt->second._normal += distWgt * newNormal;
7177 e2neIt->second._cosin = newCos;
7178 e2neIt->second.SetMaxLen( 0.7 * minIntDist / edge1->_lenFactor );
7179 if ( iter > 0 && sgn1 * sgn2 < 0 && edge1->_cosin < 0 )
7180 e2neIt->second._normal += dir2;
7182 e2neIt = edge2newEdge.insert( make_pair( edge2, zeroEdge )).first;
7183 e2neIt->second._normal += distWgt * newNormal;
7184 if ( Precision::IsInfinite( zeroEdge._maxLen ))
7186 e2neIt->second._cosin = edge2->_cosin;
7187 e2neIt->second.SetMaxLen( 1.3 * minIntDist / edge1->_lenFactor );
7189 if ( iter > 0 && sgn1 * sgn2 < 0 && edge2->_cosin < 0 )
7190 e2neIt->second._normal += dir1;
7194 if ( edge2newEdge.empty() )
7195 break; //return true;
7197 dumpFunction(SMESH_Comment("updateNormals")<< data._index << "_" << stepNb << "_it" << iter);
7199 // Update data of edges depending on a new _normal
7202 for ( e2neIt = edge2newEdge.begin(); e2neIt != edge2newEdge.end(); ++e2neIt )
7204 _LayerEdge* edge = e2neIt->first;
7205 _LayerEdge& newEdge = e2neIt->second;
7206 _EdgesOnShape* eos = data.GetShapeEdges( edge );
7207 if ( edge->Is( _LayerEdge::BLOCKED && newEdge._maxLen > edge->_len ))
7210 // Check if a new _normal is OK:
7211 newEdge._normal.Normalize();
7212 if ( !isNewNormalOk( data, *edge, newEdge._normal ))
7214 if ( newEdge._maxLen < edge->_len && iter > 0 ) // limit _maxLen
7216 edge->InvalidateStep( stepNb + 1, *eos, /*restoreLength=*/true );
7217 edge->SetMaxLen( newEdge._maxLen );
7218 edge->SetNewLength( newEdge._maxLen, *eos, helper );
7220 continue; // the new _normal is bad
7222 // the new _normal is OK
7224 // find shapes that need smoothing due to change of _normal
7225 if ( edge->_cosin < theMinSmoothCosin &&
7226 newEdge._cosin > theMinSmoothCosin )
7228 if ( eos->_sWOL.IsNull() )
7230 SMDS_ElemIteratorPtr fIt = edge->_nodes[0]->GetInverseElementIterator(SMDSAbs_Face);
7231 while ( fIt->more() )
7232 shapesToSmooth.insert( data.GetShapeEdges( fIt->next()->getshapeId() ));
7234 else // edge inflates along a FACE
7236 TopoDS_Shape V = helper.GetSubShapeByNode( edge->_nodes[0], getMeshDS() );
7237 PShapeIteratorPtr eIt = helper.GetAncestors( V, *_mesh, TopAbs_EDGE, &eos->_sWOL );
7238 while ( const TopoDS_Shape* E = eIt->next() )
7240 gp_Vec edgeDir = getEdgeDir( TopoDS::Edge( *E ), TopoDS::Vertex( V ));
7241 double angle = edgeDir.Angle( newEdge._normal ); // [0,PI]
7242 if ( angle < M_PI / 2 )
7243 shapesToSmooth.insert( data.GetShapeEdges( *E ));
7248 double len = edge->_len;
7249 edge->InvalidateStep( stepNb + 1, *eos, /*restoreLength=*/true );
7250 edge->SetNormal( newEdge._normal );
7251 edge->SetCosin( newEdge._cosin );
7252 edge->SetNewLength( len, *eos, helper );
7253 edge->Set( _LayerEdge::MARKED );
7254 edge->Set( _LayerEdge::NORMAL_UPDATED );
7255 edgesNoAnaSmooth.insert( eos );
7258 // Update normals and other dependent data of not intersecting _LayerEdge's
7259 // neighboring the intersecting ones
7261 for ( e2neIt = edge2newEdge.begin(); e2neIt != edge2newEdge.end(); ++e2neIt )
7263 _LayerEdge* edge1 = e2neIt->first;
7264 _EdgesOnShape* eos1 = data.GetShapeEdges( edge1 );
7265 if ( !edge1->Is( _LayerEdge::MARKED ))
7268 if ( edge1->IsOnEdge() )
7270 const SMDS_MeshNode * n1 = edge1->_2neibors->srcNode(0);
7271 const SMDS_MeshNode * n2 = edge1->_2neibors->srcNode(1);
7272 edge1->SetDataByNeighbors( n1, n2, *eos1, helper );
7275 if ( !edge1->_2neibors || !eos1->_sWOL.IsNull() )
7277 for ( int j = 0; j < 2; ++j ) // loop on 2 neighbors
7279 _LayerEdge* neighbor = edge1->_2neibors->_edges[j];
7280 if ( neighbor->Is( _LayerEdge::MARKED ) /*edge2newEdge.count ( neighbor )*/)
7281 continue; // j-th neighbor is also intersected
7282 _LayerEdge* prevEdge = edge1;
7283 const int nbSteps = 10;
7284 for ( int step = nbSteps; step; --step ) // step from edge1 in j-th direction
7286 if ( neighbor->Is( _LayerEdge::BLOCKED ) ||
7287 neighbor->Is( _LayerEdge::MARKED ))
7289 _EdgesOnShape* eos = data.GetShapeEdges( neighbor );
7290 if ( !eos ) continue;
7291 _LayerEdge* nextEdge = neighbor;
7292 if ( neighbor->_2neibors )
7295 nextEdge = neighbor->_2neibors->_edges[iNext];
7296 if ( nextEdge == prevEdge )
7297 nextEdge = neighbor->_2neibors->_edges[ ++iNext ];
7299 double r = double(step-1)/nbSteps/(iter+1);
7300 if ( !nextEdge->_2neibors )
7303 gp_XYZ newNorm = prevEdge->_normal * r + nextEdge->_normal * (1-r);
7304 newNorm.Normalize();
7305 if ( !isNewNormalOk( data, *neighbor, newNorm ))
7308 double len = neighbor->_len;
7309 neighbor->InvalidateStep( stepNb + 1, *eos, /*restoreLength=*/true );
7310 neighbor->SetNormal( newNorm );
7311 neighbor->SetCosin( prevEdge->_cosin * r + nextEdge->_cosin * (1-r) );
7312 if ( neighbor->_2neibors )
7313 neighbor->SetDataByNeighbors( prevEdge->_nodes[0], nextEdge->_nodes[0], *eos, helper );
7314 neighbor->SetNewLength( len, *eos, helper );
7315 neighbor->Set( _LayerEdge::MARKED );
7316 neighbor->Set( _LayerEdge::NORMAL_UPDATED );
7317 edgesNoAnaSmooth.insert( eos );
7319 if ( !neighbor->_2neibors )
7320 break; // neighbor is on VERTEX
7322 // goto the next neighbor
7323 prevEdge = neighbor;
7324 neighbor = nextEdge;
7331 data.AddShapesToSmooth( shapesToSmooth, &edgesNoAnaSmooth );
7336 //================================================================================
7338 * \brief Check if a new normal is OK
7340 //================================================================================
7342 bool _ViscousBuilder::isNewNormalOk( _SolidData& data,
7344 const gp_XYZ& newNormal)
7346 // check a min angle between the newNormal and surrounding faces
7347 vector<_Simplex> simplices;
7348 SMESH_TNodeXYZ n0( edge._nodes[0] ), n1, n2;
7349 _Simplex::GetSimplices( n0._node, simplices, data._ignoreFaceIds, &data );
7350 double newMinDot = 1, curMinDot = 1;
7351 for ( size_t i = 0; i < simplices.size(); ++i )
7353 n1.Set( simplices[i]._nPrev );
7354 n2.Set( simplices[i]._nNext );
7355 gp_XYZ normFace = ( n1 - n0 ) ^ ( n2 - n0 );
7356 double normLen2 = normFace.SquareModulus();
7357 if ( normLen2 < std::numeric_limits<double>::min() )
7359 normFace /= Sqrt( normLen2 );
7360 newMinDot = Min( newNormal * normFace, newMinDot );
7361 curMinDot = Min( edge._normal * normFace, curMinDot );
7364 if ( newMinDot < 0.5 )
7366 ok = ( newMinDot >= curMinDot * 0.9 );
7367 //return ( newMinDot >= ( curMinDot * ( 0.8 + 0.1 * edge.NbSteps() )));
7368 // double initMinDot2 = 1. - edge._cosin * edge._cosin;
7369 // return ( newMinDot * newMinDot ) >= ( 0.8 * initMinDot2 );
7375 //================================================================================
7377 * \brief Modify normals of _LayerEdge's on FACE to reflex smoothing
7379 //================================================================================
7381 bool _ViscousBuilder::updateNormalsOfSmoothed( _SolidData& data,
7382 SMESH_MesherHelper& helper,
7384 const double stepSize )
7386 if ( data._nbShapesToSmooth == 0 || nbSteps == 0 )
7387 return true; // no shapes needing smoothing
7389 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
7391 _EdgesOnShape& eos = data._edgesOnShape[ iS ];
7392 if ( //!eos._toSmooth || _eosC1 have _toSmooth == false
7393 !eos._hyp.ToSmooth() ||
7394 eos.ShapeType() != TopAbs_FACE ||
7395 eos._edges.empty() )
7398 bool toSmooth = ( eos._edges[ 0 ]->NbSteps() >= nbSteps+1 );
7399 if ( !toSmooth ) continue;
7401 for ( size_t i = 0; i < eos._edges.size(); ++i )
7403 _LayerEdge* edge = eos._edges[i];
7404 if ( !edge->Is( _LayerEdge::SMOOTHED ))
7406 if ( edge->Is( _LayerEdge::DIFFICULT ) && nbSteps != 1 )
7409 const gp_XYZ& pPrev = edge->PrevPos();
7410 const gp_XYZ& pLast = edge->_pos.back();
7411 gp_XYZ stepVec = pLast - pPrev;
7412 double realStepSize = stepVec.Modulus();
7413 if ( realStepSize < numeric_limits<double>::min() )
7416 edge->_lenFactor = realStepSize / stepSize;
7417 edge->_normal = stepVec / realStepSize;
7418 edge->Set( _LayerEdge::NORMAL_UPDATED );
7425 //================================================================================
7427 * \brief Modify normals of _LayerEdge's on C1 VERTEXes
7429 //================================================================================
7431 void _ViscousBuilder::updateNormalsOfC1Vertices( _SolidData& data )
7433 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
7435 _EdgesOnShape& eov = data._edgesOnShape[ iS ];
7436 if ( eov._eosC1.empty() ||
7437 eov.ShapeType() != TopAbs_VERTEX ||
7438 eov._edges.empty() )
7441 gp_XYZ newNorm = eov._edges[0]->_normal;
7442 double curThick = eov._edges[0]->_len * eov._edges[0]->_lenFactor;
7443 bool normChanged = false;
7445 for ( size_t i = 0; i < eov._eosC1.size(); ++i )
7447 _EdgesOnShape* eoe = eov._eosC1[i];
7448 const TopoDS_Edge& e = TopoDS::Edge( eoe->_shape );
7449 const double eLen = SMESH_Algo::EdgeLength( e );
7450 TopoDS_Shape oppV = SMESH_MesherHelper::IthVertex( 0, e );
7451 if ( oppV.IsSame( eov._shape ))
7452 oppV = SMESH_MesherHelper::IthVertex( 1, e );
7453 _EdgesOnShape* eovOpp = data.GetShapeEdges( oppV );
7454 if ( !eovOpp || eovOpp->_edges.empty() ) continue;
7455 if ( eov._edges[0]->Is( _LayerEdge::BLOCKED )) continue;
7457 double curThickOpp = eovOpp->_edges[0]->_len * eovOpp->_edges[0]->_lenFactor;
7458 if ( curThickOpp + curThick < eLen )
7461 double wgt = 2. * curThick / eLen;
7462 newNorm += wgt * eovOpp->_edges[0]->_normal;
7467 eov._edges[0]->SetNormal( newNorm.Normalized() );
7468 eov._edges[0]->Set( _LayerEdge::NORMAL_UPDATED );
7473 //================================================================================
7475 * \brief Modify normals of _LayerEdge's on _ConvexFace's
7477 //================================================================================
7479 bool _ViscousBuilder::updateNormalsOfConvexFaces( _SolidData& data,
7480 SMESH_MesherHelper& helper,
7483 SMESHDS_Mesh* meshDS = helper.GetMeshDS();
7486 map< TGeomID, _ConvexFace >::iterator id2face = data._convexFaces.begin();
7487 for ( ; id2face != data._convexFaces.end(); ++id2face )
7489 _ConvexFace & convFace = (*id2face).second;
7490 convFace._normalsFixedOnBorders = false; // to update at each inflation step
7492 if ( convFace._normalsFixed )
7493 continue; // already fixed
7494 if ( convFace.CheckPrisms() )
7495 continue; // nothing to fix
7497 convFace._normalsFixed = true;
7499 BRepAdaptor_Surface surface ( convFace._face, false );
7500 BRepLProp_SLProps surfProp( surface, 2, 1e-6 );
7502 // check if the convex FACE is of spherical shape
7504 Bnd_B3d centersBox; // bbox of centers of curvature of _LayerEdge's on VERTEXes
7508 map< TGeomID, _EdgesOnShape* >::iterator id2eos = convFace._subIdToEOS.begin();
7509 for ( ; id2eos != convFace._subIdToEOS.end(); ++id2eos )
7511 _EdgesOnShape& eos = *(id2eos->second);
7512 if ( eos.ShapeType() == TopAbs_VERTEX )
7514 _LayerEdge* ledge = eos._edges[ 0 ];
7515 if ( convFace.GetCenterOfCurvature( ledge, surfProp, helper, center ))
7516 centersBox.Add( center );
7518 for ( size_t i = 0; i < eos._edges.size(); ++i )
7519 nodesBox.Add( SMESH_TNodeXYZ( eos._edges[ i ]->_nodes[0] ));
7521 if ( centersBox.IsVoid() )
7523 debugMsg( "Error: centersBox.IsVoid()" );
7526 const bool isSpherical =
7527 ( centersBox.SquareExtent() < 1e-6 * nodesBox.SquareExtent() );
7529 int nbEdges = helper.Count( convFace._face, TopAbs_EDGE, /*ignoreSame=*/false );
7530 vector < _CentralCurveOnEdge > centerCurves( nbEdges );
7534 // set _LayerEdge::_normal as average of all normals
7536 // WARNING: different density of nodes on EDGEs is not taken into account that
7537 // can lead to an improper new normal
7539 gp_XYZ avgNormal( 0,0,0 );
7541 id2eos = convFace._subIdToEOS.begin();
7542 for ( ; id2eos != convFace._subIdToEOS.end(); ++id2eos )
7544 _EdgesOnShape& eos = *(id2eos->second);
7545 // set data of _CentralCurveOnEdge
7546 if ( eos.ShapeType() == TopAbs_EDGE )
7548 _CentralCurveOnEdge& ceCurve = centerCurves[ nbEdges++ ];
7549 ceCurve.SetShapes( TopoDS::Edge( eos._shape ), convFace, data, helper );
7550 if ( !eos._sWOL.IsNull() )
7551 ceCurve._adjFace.Nullify();
7553 ceCurve._ledges.insert( ceCurve._ledges.end(),
7554 eos._edges.begin(), eos._edges.end());
7556 // summarize normals
7557 for ( size_t i = 0; i < eos._edges.size(); ++i )
7558 avgNormal += eos._edges[ i ]->_normal;
7560 double normSize = avgNormal.SquareModulus();
7561 if ( normSize < 1e-200 )
7563 debugMsg( "updateNormalsOfConvexFaces(): zero avgNormal" );
7566 avgNormal /= Sqrt( normSize );
7568 // compute new _LayerEdge::_cosin on EDGEs
7569 double avgCosin = 0;
7572 for ( size_t iE = 0; iE < centerCurves.size(); ++iE )
7574 _CentralCurveOnEdge& ceCurve = centerCurves[ iE ];
7575 if ( ceCurve._adjFace.IsNull() )
7577 for ( size_t iLE = 0; iLE < ceCurve._ledges.size(); ++iLE )
7579 const SMDS_MeshNode* node = ceCurve._ledges[ iLE ]->_nodes[0];
7580 inFaceDir = getFaceDir( ceCurve._adjFace, ceCurve._edge, node, helper, isOK );
7583 double angle = inFaceDir.Angle( avgNormal ); // [0,PI]
7584 ceCurve._ledges[ iLE ]->_cosin = Cos( angle );
7585 avgCosin += ceCurve._ledges[ iLE ]->_cosin;
7591 avgCosin /= nbCosin;
7593 // set _LayerEdge::_normal = avgNormal
7594 id2eos = convFace._subIdToEOS.begin();
7595 for ( ; id2eos != convFace._subIdToEOS.end(); ++id2eos )
7597 _EdgesOnShape& eos = *(id2eos->second);
7598 if ( eos.ShapeType() != TopAbs_EDGE )
7599 for ( size_t i = 0; i < eos._edges.size(); ++i )
7600 eos._edges[ i ]->_cosin = avgCosin;
7602 for ( size_t i = 0; i < eos._edges.size(); ++i )
7604 eos._edges[ i ]->SetNormal( avgNormal );
7605 eos._edges[ i ]->Set( _LayerEdge::NORMAL_UPDATED );
7609 else // if ( isSpherical )
7611 // We suppose that centers of curvature at all points of the FACE
7612 // lie on some curve, let's call it "central curve". For all _LayerEdge's
7613 // having a common center of curvature we define the same new normal
7614 // as a sum of normals of _LayerEdge's on EDGEs among them.
7616 // get all centers of curvature for each EDGE
7618 helper.SetSubShape( convFace._face );
7619 _LayerEdge* vertexLEdges[2], **edgeLEdge, **edgeLEdgeEnd;
7621 TopExp_Explorer edgeExp( convFace._face, TopAbs_EDGE );
7622 for ( int iE = 0; edgeExp.More(); edgeExp.Next(), ++iE )
7624 const TopoDS_Edge& edge = TopoDS::Edge( edgeExp.Current() );
7626 // set adjacent FACE
7627 centerCurves[ iE ].SetShapes( edge, convFace, data, helper );
7629 // get _LayerEdge's of the EDGE
7630 TGeomID edgeID = meshDS->ShapeToIndex( edge );
7631 _EdgesOnShape* eos = data.GetShapeEdges( edgeID );
7632 if ( !eos || eos->_edges.empty() )
7634 // no _LayerEdge's on EDGE, use _LayerEdge's on VERTEXes
7635 for ( int iV = 0; iV < 2; ++iV )
7637 TopoDS_Vertex v = helper.IthVertex( iV, edge );
7638 TGeomID vID = meshDS->ShapeToIndex( v );
7639 eos = data.GetShapeEdges( vID );
7640 vertexLEdges[ iV ] = eos->_edges[ 0 ];
7642 edgeLEdge = &vertexLEdges[0];
7643 edgeLEdgeEnd = edgeLEdge + 2;
7645 centerCurves[ iE ]._adjFace.Nullify();
7649 if ( ! eos->_toSmooth )
7650 data.SortOnEdge( edge, eos->_edges );
7651 edgeLEdge = &eos->_edges[ 0 ];
7652 edgeLEdgeEnd = edgeLEdge + eos->_edges.size();
7653 vertexLEdges[0] = eos->_edges.front()->_2neibors->_edges[0];
7654 vertexLEdges[1] = eos->_edges.back() ->_2neibors->_edges[1];
7656 if ( ! eos->_sWOL.IsNull() )
7657 centerCurves[ iE ]._adjFace.Nullify();
7660 // Get curvature centers
7664 if ( edgeLEdge[0]->IsOnEdge() &&
7665 convFace.GetCenterOfCurvature( vertexLEdges[0], surfProp, helper, center ))
7667 centerCurves[ iE ].Append( center, vertexLEdges[0] );
7668 centersBox.Add( center );
7670 for ( ; edgeLEdge < edgeLEdgeEnd; ++edgeLEdge )
7671 if ( convFace.GetCenterOfCurvature( *edgeLEdge, surfProp, helper, center ))
7672 { // EDGE or VERTEXes
7673 centerCurves[ iE ].Append( center, *edgeLEdge );
7674 centersBox.Add( center );
7676 if ( edgeLEdge[-1]->IsOnEdge() &&
7677 convFace.GetCenterOfCurvature( vertexLEdges[1], surfProp, helper, center ))
7679 centerCurves[ iE ].Append( center, vertexLEdges[1] );
7680 centersBox.Add( center );
7682 centerCurves[ iE ]._isDegenerated =
7683 ( centersBox.IsVoid() || centersBox.SquareExtent() < 1e-6 * nodesBox.SquareExtent() );
7685 } // loop on EDGES of convFace._face to set up data of centerCurves
7687 // Compute new normals for _LayerEdge's on EDGEs
7689 double avgCosin = 0;
7692 for ( size_t iE1 = 0; iE1 < centerCurves.size(); ++iE1 )
7694 _CentralCurveOnEdge& ceCurve = centerCurves[ iE1 ];
7695 if ( ceCurve._isDegenerated )
7697 const vector< gp_Pnt >& centers = ceCurve._curvaCenters;
7698 vector< gp_XYZ > & newNormals = ceCurve._normals;
7699 for ( size_t iC1 = 0; iC1 < centers.size(); ++iC1 )
7702 for ( size_t iE2 = 0; iE2 < centerCurves.size() && !isOK; ++iE2 )
7705 isOK = centerCurves[ iE2 ].FindNewNormal( centers[ iC1 ], newNormals[ iC1 ]);
7707 if ( isOK && !ceCurve._adjFace.IsNull() )
7709 // compute new _LayerEdge::_cosin
7710 const SMDS_MeshNode* node = ceCurve._ledges[ iC1 ]->_nodes[0];
7711 inFaceDir = getFaceDir( ceCurve._adjFace, ceCurve._edge, node, helper, isOK );
7714 double angle = inFaceDir.Angle( newNormals[ iC1 ] ); // [0,PI]
7715 ceCurve._ledges[ iC1 ]->_cosin = Cos( angle );
7716 avgCosin += ceCurve._ledges[ iC1 ]->_cosin;
7722 // set new normals to _LayerEdge's of NOT degenerated central curves
7723 for ( size_t iE = 0; iE < centerCurves.size(); ++iE )
7725 if ( centerCurves[ iE ]._isDegenerated )
7727 for ( size_t iLE = 0; iLE < centerCurves[ iE ]._ledges.size(); ++iLE )
7729 centerCurves[ iE ]._ledges[ iLE ]->SetNormal( centerCurves[ iE ]._normals[ iLE ]);
7730 centerCurves[ iE ]._ledges[ iLE ]->Set( _LayerEdge::NORMAL_UPDATED );
7733 // set new normals to _LayerEdge's of degenerated central curves
7734 for ( size_t iE = 0; iE < centerCurves.size(); ++iE )
7736 if ( !centerCurves[ iE ]._isDegenerated ||
7737 centerCurves[ iE ]._ledges.size() < 3 )
7739 // new normal is an average of new normals at VERTEXes that
7740 // was computed on non-degenerated _CentralCurveOnEdge's
7741 gp_XYZ newNorm = ( centerCurves[ iE ]._ledges.front()->_normal +
7742 centerCurves[ iE ]._ledges.back ()->_normal );
7743 double sz = newNorm.Modulus();
7747 double newCosin = ( 0.5 * centerCurves[ iE ]._ledges.front()->_cosin +
7748 0.5 * centerCurves[ iE ]._ledges.back ()->_cosin );
7749 for ( size_t iLE = 1, nb = centerCurves[ iE ]._ledges.size() - 1; iLE < nb; ++iLE )
7751 centerCurves[ iE ]._ledges[ iLE ]->SetNormal( newNorm );
7752 centerCurves[ iE ]._ledges[ iLE ]->_cosin = newCosin;
7753 centerCurves[ iE ]._ledges[ iLE ]->Set( _LayerEdge::NORMAL_UPDATED );
7757 // Find new normals for _LayerEdge's based on FACE
7760 avgCosin /= nbCosin;
7761 const TGeomID faceID = meshDS->ShapeToIndex( convFace._face );
7762 map< TGeomID, _EdgesOnShape* >::iterator id2eos = convFace._subIdToEOS.find( faceID );
7763 if ( id2eos != convFace._subIdToEOS.end() )
7767 _EdgesOnShape& eos = * ( id2eos->second );
7768 for ( size_t i = 0; i < eos._edges.size(); ++i )
7770 _LayerEdge* ledge = eos._edges[ i ];
7771 if ( !convFace.GetCenterOfCurvature( ledge, surfProp, helper, center ))
7773 for ( size_t i = 0; i < centerCurves.size(); ++i, ++iE )
7775 iE = iE % centerCurves.size();
7776 if ( centerCurves[ iE ]._isDegenerated )
7778 newNorm.SetCoord( 0,0,0 );
7779 if ( centerCurves[ iE ].FindNewNormal( center, newNorm ))
7781 ledge->SetNormal( newNorm );
7782 ledge->_cosin = avgCosin;
7783 ledge->Set( _LayerEdge::NORMAL_UPDATED );
7790 } // not a quasi-spherical FACE
7792 // Update _LayerEdge's data according to a new normal
7794 dumpFunction(SMESH_Comment("updateNormalsOfConvexFaces")<<data._index
7795 <<"_F"<<meshDS->ShapeToIndex( convFace._face ));
7797 id2eos = convFace._subIdToEOS.begin();
7798 for ( ; id2eos != convFace._subIdToEOS.end(); ++id2eos )
7800 _EdgesOnShape& eos = * ( id2eos->second );
7801 for ( size_t i = 0; i < eos._edges.size(); ++i )
7803 _LayerEdge* & ledge = eos._edges[ i ];
7804 double len = ledge->_len;
7805 ledge->InvalidateStep( stepNb + 1, eos, /*restoreLength=*/true );
7806 ledge->SetCosin( ledge->_cosin );
7807 ledge->SetNewLength( len, eos, helper );
7809 if ( eos.ShapeType() != TopAbs_FACE )
7810 for ( size_t i = 0; i < eos._edges.size(); ++i )
7812 _LayerEdge* ledge = eos._edges[ i ];
7813 for ( size_t iN = 0; iN < ledge->_neibors.size(); ++iN )
7815 _LayerEdge* neibor = ledge->_neibors[iN];
7816 if ( neibor->_nodes[0]->GetPosition()->GetDim() == 2 )
7818 neibor->Set( _LayerEdge::NEAR_BOUNDARY );
7819 neibor->Set( _LayerEdge::MOVED );
7820 neibor->SetSmooLen( neibor->_len );
7824 } // loop on sub-shapes of convFace._face
7826 // Find FACEs adjacent to convFace._face that got necessity to smooth
7827 // as a result of normals modification
7829 set< _EdgesOnShape* > adjFacesToSmooth;
7830 for ( size_t iE = 0; iE < centerCurves.size(); ++iE )
7832 if ( centerCurves[ iE ]._adjFace.IsNull() ||
7833 centerCurves[ iE ]._adjFaceToSmooth )
7835 for ( size_t iLE = 0; iLE < centerCurves[ iE ]._ledges.size(); ++iLE )
7837 if ( centerCurves[ iE ]._ledges[ iLE ]->_cosin > theMinSmoothCosin )
7839 adjFacesToSmooth.insert( data.GetShapeEdges( centerCurves[ iE ]._adjFace ));
7844 data.AddShapesToSmooth( adjFacesToSmooth );
7849 } // loop on data._convexFaces
7854 //================================================================================
7856 * \brief Return max curvature of a FACE
7858 //================================================================================
7860 double _ConvexFace::GetMaxCurvature( _SolidData& data,
7862 BRepLProp_SLProps& surfProp,
7863 SMESH_MesherHelper& helper)
7865 double maxCurvature = 0;
7867 TopoDS_Face F = TopoDS::Face( eof._shape );
7869 const int nbTestPnt = 5;
7870 const double oriFactor = ( F.Orientation() == TopAbs_REVERSED ? +1. : -1. );
7871 SMESH_subMeshIteratorPtr smIt = eof._subMesh->getDependsOnIterator(/*includeSelf=*/true);
7872 while ( smIt->more() )
7874 SMESH_subMesh* sm = smIt->next();
7875 const TGeomID subID = sm->GetId();
7877 // find _LayerEdge's of a sub-shape
7879 if (( eos = data.GetShapeEdges( subID )))
7880 this->_subIdToEOS.insert( make_pair( subID, eos ));
7884 // check concavity and curvature and limit data._stepSize
7885 const double minCurvature =
7886 1. / ( eos->_hyp.GetTotalThickness() * ( 1 + theThickToIntersection ));
7887 size_t iStep = Max( 1, eos->_edges.size() / nbTestPnt );
7888 for ( size_t i = 0; i < eos->_edges.size(); i += iStep )
7890 gp_XY uv = helper.GetNodeUV( F, eos->_edges[ i ]->_nodes[0] );
7891 surfProp.SetParameters( uv.X(), uv.Y() );
7892 if ( surfProp.IsCurvatureDefined() )
7894 double curvature = Max( surfProp.MaxCurvature() * oriFactor,
7895 surfProp.MinCurvature() * oriFactor );
7896 maxCurvature = Max( maxCurvature, curvature );
7898 if ( curvature > minCurvature )
7899 this->_isTooCurved = true;
7902 } // loop on sub-shapes of the FACE
7904 return maxCurvature;
7907 //================================================================================
7909 * \brief Finds a center of curvature of a surface at a _LayerEdge
7911 //================================================================================
7913 bool _ConvexFace::GetCenterOfCurvature( _LayerEdge* ledge,
7914 BRepLProp_SLProps& surfProp,
7915 SMESH_MesherHelper& helper,
7916 gp_Pnt & center ) const
7918 gp_XY uv = helper.GetNodeUV( _face, ledge->_nodes[0] );
7919 surfProp.SetParameters( uv.X(), uv.Y() );
7920 if ( !surfProp.IsCurvatureDefined() )
7923 const double oriFactor = ( _face.Orientation() == TopAbs_REVERSED ? +1. : -1. );
7924 double surfCurvatureMax = surfProp.MaxCurvature() * oriFactor;
7925 double surfCurvatureMin = surfProp.MinCurvature() * oriFactor;
7926 if ( surfCurvatureMin > surfCurvatureMax )
7927 center = surfProp.Value().Translated( surfProp.Normal().XYZ() / surfCurvatureMin * oriFactor );
7929 center = surfProp.Value().Translated( surfProp.Normal().XYZ() / surfCurvatureMax * oriFactor );
7934 //================================================================================
7936 * \brief Check that prisms are not distorted
7938 //================================================================================
7940 bool _ConvexFace::CheckPrisms() const
7943 for ( size_t i = 0; i < _simplexTestEdges.size(); ++i )
7945 const _LayerEdge* edge = _simplexTestEdges[i];
7946 SMESH_TNodeXYZ tgtXYZ( edge->_nodes.back() );
7947 for ( size_t j = 0; j < edge->_simplices.size(); ++j )
7948 if ( !edge->_simplices[j].IsForward( edge->_nodes[0], tgtXYZ, vol ))
7950 debugMsg( "Bad simplex of _simplexTestEdges ("
7951 << " "<< edge->_nodes[0]->GetID()<< " "<< tgtXYZ._node->GetID()
7952 << " "<< edge->_simplices[j]._nPrev->GetID()
7953 << " "<< edge->_simplices[j]._nNext->GetID() << " )" );
7960 //================================================================================
7962 * \brief Try to compute a new normal by interpolating normals of _LayerEdge's
7963 * stored in this _CentralCurveOnEdge.
7964 * \param [in] center - curvature center of a point of another _CentralCurveOnEdge.
7965 * \param [in,out] newNormal - current normal at this point, to be redefined
7966 * \return bool - true if succeeded.
7968 //================================================================================
7970 bool _CentralCurveOnEdge::FindNewNormal( const gp_Pnt& center, gp_XYZ& newNormal )
7972 if ( this->_isDegenerated )
7975 // find two centers the given one lies between
7977 for ( size_t i = 0, nb = _curvaCenters.size()-1; i < nb; ++i )
7979 double sl2 = 1.001 * _segLength2[ i ];
7981 double d1 = center.SquareDistance( _curvaCenters[ i ]);
7985 double d2 = center.SquareDistance( _curvaCenters[ i+1 ]);
7986 if ( d2 > sl2 || d2 + d1 < 1e-100 )
7991 double r = d1 / ( d1 + d2 );
7992 gp_XYZ norm = (( 1. - r ) * _ledges[ i ]->_normal +
7993 ( r ) * _ledges[ i+1 ]->_normal );
7997 double sz = newNormal.Modulus();
8006 //================================================================================
8008 * \brief Set shape members
8010 //================================================================================
8012 void _CentralCurveOnEdge::SetShapes( const TopoDS_Edge& edge,
8013 const _ConvexFace& convFace,
8015 SMESH_MesherHelper& helper)
8019 PShapeIteratorPtr fIt = helper.GetAncestors( edge, *helper.GetMesh(), TopAbs_FACE );
8020 while ( const TopoDS_Shape* F = fIt->next())
8021 if ( !convFace._face.IsSame( *F ))
8023 _adjFace = TopoDS::Face( *F );
8024 _adjFaceToSmooth = false;
8025 // _adjFace already in a smoothing queue ?
8026 if ( _EdgesOnShape* eos = data.GetShapeEdges( _adjFace ))
8027 _adjFaceToSmooth = eos->_toSmooth;
8032 //================================================================================
8034 * \brief Looks for intersection of it's last segment with faces
8035 * \param distance - returns shortest distance from the last node to intersection
8037 //================================================================================
8039 bool _LayerEdge::FindIntersection( SMESH_ElementSearcher& searcher,
8041 const double& epsilon,
8043 const SMDS_MeshElement** intFace)
8045 vector< const SMDS_MeshElement* > suspectFaces;
8047 gp_Ax1 lastSegment = LastSegment( segLen, eos );
8048 searcher.GetElementsNearLine( lastSegment, SMDSAbs_Face, suspectFaces );
8050 bool segmentIntersected = false;
8051 distance = Precision::Infinite();
8052 int iFace = -1; // intersected face
8053 for ( size_t j = 0 ; j < suspectFaces.size() /*&& !segmentIntersected*/; ++j )
8055 const SMDS_MeshElement* face = suspectFaces[j];
8056 if ( face->GetNodeIndex( _nodes.back() ) >= 0 ||
8057 face->GetNodeIndex( _nodes[0] ) >= 0 )
8058 continue; // face sharing _LayerEdge node
8059 const int nbNodes = face->NbCornerNodes();
8060 bool intFound = false;
8062 SMDS_MeshElement::iterator nIt = face->begin_nodes();
8065 intFound = SegTriaInter( lastSegment, *nIt++, *nIt++, *nIt++, dist, epsilon );
8069 const SMDS_MeshNode* tria[3];
8072 for ( int n2 = 2; n2 < nbNodes && !intFound; ++n2 )
8075 intFound = SegTriaInter(lastSegment, tria[0], tria[1], tria[2], dist, epsilon );
8081 if ( dist < segLen*(1.01) && dist > -(_len*_lenFactor-segLen) )
8082 segmentIntersected = true;
8083 if ( distance > dist )
8084 distance = dist, iFace = j;
8087 if ( intFace ) *intFace = ( iFace != -1 ) ? suspectFaces[iFace] : 0;
8091 if ( segmentIntersected )
8094 SMDS_MeshElement::iterator nIt = suspectFaces[iFace]->begin_nodes();
8095 gp_XYZ intP( lastSegment.Location().XYZ() + lastSegment.Direction().XYZ() * ( distance+segLen ));
8096 cout << "nodes: tgt " << _nodes.back()->GetID() << " src " << _nodes[0]->GetID()
8097 << ", intersection with face ("
8098 << (*nIt++)->GetID()<<" "<< (*nIt++)->GetID()<<" "<< (*nIt++)->GetID()
8099 << ") at point (" << intP.X() << ", " << intP.Y() << ", " << intP.Z()
8100 << ") distance = " << distance << endl;
8104 return segmentIntersected;
8107 //================================================================================
8109 * \brief Returns a point used to check orientation of _simplices
8111 //================================================================================
8113 gp_XYZ _LayerEdge::PrevCheckPos( _EdgesOnShape* eos ) const
8115 size_t i = Is( NORMAL_UPDATED ) && IsOnFace() ? _pos.size()-2 : 0;
8117 if ( !eos || eos->_sWOL.IsNull() )
8120 if ( eos->SWOLType() == TopAbs_EDGE )
8122 return BRepAdaptor_Curve( TopoDS::Edge( eos->_sWOL )).Value( _pos[i].X() ).XYZ();
8124 //else // TopAbs_FACE
8126 return BRepAdaptor_Surface( TopoDS::Face( eos->_sWOL )).Value(_pos[i].X(), _pos[i].Y() ).XYZ();
8129 //================================================================================
8131 * \brief Returns size and direction of the last segment
8133 //================================================================================
8135 gp_Ax1 _LayerEdge::LastSegment(double& segLen, _EdgesOnShape& eos) const
8137 // find two non-coincident positions
8138 gp_XYZ orig = _pos.back();
8140 int iPrev = _pos.size() - 2;
8141 //const double tol = ( _len > 0 ) ? 0.3*_len : 1e-100; // adjusted for IPAL52478 + PAL22576
8142 const double tol = ( _len > 0 ) ? ( 1e-6 * _len ) : 1e-100;
8143 while ( iPrev >= 0 )
8145 vec = orig - _pos[iPrev];
8146 if ( vec.SquareModulus() > tol*tol )
8156 segDir.SetLocation( SMESH_TNodeXYZ( _nodes[0] ));
8157 segDir.SetDirection( _normal );
8162 gp_Pnt pPrev = _pos[ iPrev ];
8163 if ( !eos._sWOL.IsNull() )
8165 TopLoc_Location loc;
8166 if ( eos.SWOLType() == TopAbs_EDGE )
8169 Handle(Geom_Curve) curve = BRep_Tool::Curve( TopoDS::Edge( eos._sWOL ), loc, f,l);
8170 pPrev = curve->Value( pPrev.X() ).Transformed( loc );
8174 Handle(Geom_Surface) surface = BRep_Tool::Surface( TopoDS::Face( eos._sWOL ), loc );
8175 pPrev = surface->Value( pPrev.X(), pPrev.Y() ).Transformed( loc );
8177 vec = SMESH_TNodeXYZ( _nodes.back() ) - pPrev.XYZ();
8179 segDir.SetLocation( pPrev );
8180 segDir.SetDirection( vec );
8181 segLen = vec.Modulus();
8187 //================================================================================
8189 * \brief Return the last (or \a which) position of the target node on a FACE.
8190 * \param [in] F - the FACE this _LayerEdge is inflated along
8191 * \param [in] which - index of position
8192 * \return gp_XY - result UV
8194 //================================================================================
8196 gp_XY _LayerEdge::LastUV( const TopoDS_Face& F, _EdgesOnShape& eos, int which ) const
8198 if ( F.IsSame( eos._sWOL )) // F is my FACE
8199 return gp_XY( _pos.back().X(), _pos.back().Y() );
8201 if ( eos.SWOLType() != TopAbs_EDGE ) // wrong call
8202 return gp_XY( 1e100, 1e100 );
8204 // _sWOL is EDGE of F; _pos.back().X() is the last U on the EDGE
8205 double f, l, u = _pos[ which < 0 ? _pos.size()-1 : which ].X();
8206 Handle(Geom2d_Curve) C2d = BRep_Tool::CurveOnSurface( TopoDS::Edge(eos._sWOL), F, f,l);
8207 if ( !C2d.IsNull() && f <= u && u <= l )
8208 return C2d->Value( u ).XY();
8210 return gp_XY( 1e100, 1e100 );
8213 //================================================================================
8215 * \brief Test intersection of the last segment with a given triangle
8216 * using Moller-Trumbore algorithm
8217 * Intersection is detected if distance to intersection is less than _LayerEdge._len
8219 //================================================================================
8221 bool _LayerEdge::SegTriaInter( const gp_Ax1& lastSegment,
8222 const gp_XYZ& vert0,
8223 const gp_XYZ& vert1,
8224 const gp_XYZ& vert2,
8226 const double& EPSILON) const
8228 const gp_Pnt& orig = lastSegment.Location();
8229 const gp_Dir& dir = lastSegment.Direction();
8231 /* calculate distance from vert0 to ray origin */
8232 //gp_XYZ tvec = orig.XYZ() - vert0;
8234 //if ( tvec * dir > EPSILON )
8235 // intersected face is at back side of the temporary face this _LayerEdge belongs to
8238 gp_XYZ edge1 = vert1 - vert0;
8239 gp_XYZ edge2 = vert2 - vert0;
8241 /* begin calculating determinant - also used to calculate U parameter */
8242 gp_XYZ pvec = dir.XYZ() ^ edge2;
8244 /* if determinant is near zero, ray lies in plane of triangle */
8245 double det = edge1 * pvec;
8247 const double ANGL_EPSILON = 1e-12;
8248 if ( det > -ANGL_EPSILON && det < ANGL_EPSILON )
8251 /* calculate distance from vert0 to ray origin */
8252 gp_XYZ tvec = orig.XYZ() - vert0;
8254 /* calculate U parameter and test bounds */
8255 double u = ( tvec * pvec ) / det;
8256 //if (u < 0.0 || u > 1.0)
8257 if ( u < -EPSILON || u > 1.0 + EPSILON )
8260 /* prepare to test V parameter */
8261 gp_XYZ qvec = tvec ^ edge1;
8263 /* calculate V parameter and test bounds */
8264 double v = (dir.XYZ() * qvec) / det;
8265 //if ( v < 0.0 || u + v > 1.0 )
8266 if ( v < -EPSILON || u + v > 1.0 + EPSILON )
8269 /* calculate t, ray intersects triangle */
8270 t = (edge2 * qvec) / det;
8276 //================================================================================
8278 * \brief _LayerEdge, located at a concave VERTEX of a FACE, moves target nodes of
8279 * neighbor _LayerEdge's by it's own inflation vector.
8280 * \param [in] eov - EOS of the VERTEX
8281 * \param [in] eos - EOS of the FACE
8282 * \param [in] step - inflation step
8283 * \param [in,out] badSmooEdges - tangled _LayerEdge's
8285 //================================================================================
8287 void _LayerEdge::MoveNearConcaVer( const _EdgesOnShape* eov,
8288 const _EdgesOnShape* eos,
8290 vector< _LayerEdge* > & badSmooEdges )
8292 // check if any of _neibors is in badSmooEdges
8293 if ( std::find_first_of( _neibors.begin(), _neibors.end(),
8294 badSmooEdges.begin(), badSmooEdges.end() ) == _neibors.end() )
8297 // get all edges to move
8299 set< _LayerEdge* > edges;
8301 // find a distance between _LayerEdge on VERTEX and its neighbors
8302 gp_XYZ curPosV = SMESH_TNodeXYZ( _nodes.back() );
8304 for ( size_t i = 0; i < _neibors.size(); ++i )
8306 _LayerEdge* nEdge = _neibors[i];
8307 if ( nEdge->_nodes[0]->getshapeId() == eos->_shapeID )
8309 edges.insert( nEdge );
8310 dist2 = Max( dist2, ( curPosV - nEdge->_pos.back() ).SquareModulus() );
8313 // add _LayerEdge's close to curPosV
8317 for ( set< _LayerEdge* >::iterator e = edges.begin(); e != edges.end(); ++e )
8319 _LayerEdge* edgeF = *e;
8320 for ( size_t i = 0; i < edgeF->_neibors.size(); ++i )
8322 _LayerEdge* nEdge = edgeF->_neibors[i];
8323 if ( nEdge->_nodes[0]->getshapeId() == eos->_shapeID &&
8324 dist2 > ( curPosV - nEdge->_pos.back() ).SquareModulus() )
8325 edges.insert( nEdge );
8329 while ( nbE < edges.size() );
8331 // move the target node of the got edges
8333 gp_XYZ prevPosV = PrevPos();
8334 if ( eov->SWOLType() == TopAbs_EDGE )
8336 BRepAdaptor_Curve curve ( TopoDS::Edge( eov->_sWOL ));
8337 prevPosV = curve.Value( prevPosV.X() ).XYZ();
8339 else if ( eov->SWOLType() == TopAbs_FACE )
8341 BRepAdaptor_Surface surface( TopoDS::Face( eov->_sWOL ));
8342 prevPosV = surface.Value( prevPosV.X(), prevPosV.Y() ).XYZ();
8345 SMDS_FacePositionPtr fPos;
8346 //double r = 1. - Min( 0.9, step / 10. );
8347 for ( set< _LayerEdge* >::iterator e = edges.begin(); e != edges.end(); ++e )
8349 _LayerEdge* edgeF = *e;
8350 const gp_XYZ prevVF = edgeF->PrevPos() - prevPosV;
8351 const gp_XYZ newPosF = curPosV + prevVF;
8352 SMDS_MeshNode* tgtNodeF = const_cast<SMDS_MeshNode*>( edgeF->_nodes.back() );
8353 tgtNodeF->setXYZ( newPosF.X(), newPosF.Y(), newPosF.Z() );
8354 edgeF->_pos.back() = newPosF;
8355 dumpMoveComm( tgtNodeF, "MoveNearConcaVer" ); // debug
8357 // set _curvature to make edgeF updated by putOnOffsetSurface()
8358 if ( !edgeF->_curvature )
8359 if (( fPos = edgeF->_nodes[0]->GetPosition() ))
8361 edgeF->_curvature = _Factory::NewCurvature();
8362 edgeF->_curvature->_r = 0;
8363 edgeF->_curvature->_k = 0;
8364 edgeF->_curvature->_h2lenRatio = 0;
8365 edgeF->_curvature->_uv.SetCoord( fPos->GetUParameter(), fPos->GetVParameter() );
8368 // gp_XYZ inflationVec( SMESH_TNodeXYZ( _nodes.back() ) -
8369 // SMESH_TNodeXYZ( _nodes[0] ));
8370 // for ( set< _LayerEdge* >::iterator e = edges.begin(); e != edges.end(); ++e )
8372 // _LayerEdge* edgeF = *e;
8373 // gp_XYZ newPos = SMESH_TNodeXYZ( edgeF->_nodes[0] ) + inflationVec;
8374 // SMDS_MeshNode* tgtNode = const_cast<SMDS_MeshNode*>( edgeF->_nodes.back() );
8375 // tgtNode->setXYZ( newPos.X(), newPos.Y(), newPos.Z() );
8376 // edgeF->_pos.back() = newPosF;
8377 // dumpMoveComm( tgtNode, "MoveNearConcaVer" ); // debug
8380 // smooth _LayerEdge's around moved nodes
8381 //size_t nbBadBefore = badSmooEdges.size();
8382 for ( set< _LayerEdge* >::iterator e = edges.begin(); e != edges.end(); ++e )
8384 _LayerEdge* edgeF = *e;
8385 for ( size_t j = 0; j < edgeF->_neibors.size(); ++j )
8386 if ( edgeF->_neibors[j]->_nodes[0]->getshapeId() == eos->_shapeID )
8387 //&& !edges.count( edgeF->_neibors[j] ))
8389 _LayerEdge* edgeFN = edgeF->_neibors[j];
8390 edgeFN->Unset( SMOOTHED );
8391 int nbBad = edgeFN->Smooth( step, /*isConcaFace=*/true, /*findBest=*/true );
8394 // gp_XYZ newPos = SMESH_TNodeXYZ( edgeFN->_nodes[0] ) + inflationVec;
8395 // const gp_XYZ& prevPos = edgeFN->_pos[ edgeFN->_pos.size()-2 ];
8396 // int nbBadAfter = edgeFN->_simplices.size();
8398 // for ( size_t iS = 0; iS < edgeFN->_simplices.size(); ++iS )
8400 // nbBadAfter -= edgeFN->_simplices[iS].IsForward( &prevPos, &newPos, vol );
8402 // if ( nbBadAfter <= nbBad )
8404 // SMDS_MeshNode* tgtNode = const_cast<SMDS_MeshNode*>( edgeFN->_nodes.back() );
8405 // tgtNode->setXYZ( newPos.X(), newPos.Y(), newPos.Z() );
8406 // edgeF->_pos.back() = newPosF;
8407 // dumpMoveComm( tgtNode, "MoveNearConcaVer 2" ); // debug
8408 // nbBad = nbBadAfter;
8412 badSmooEdges.push_back( edgeFN );
8415 // move a bit not smoothed around moved nodes
8416 // for ( size_t i = nbBadBefore; i < badSmooEdges.size(); ++i )
8418 // _LayerEdge* edgeF = badSmooEdges[i];
8419 // SMDS_MeshNode* tgtNode = const_cast<SMDS_MeshNode*>( edgeF->_nodes.back() );
8420 // gp_XYZ newPos1 = SMESH_TNodeXYZ( edgeF->_nodes[0] ) + inflationVec;
8421 // gp_XYZ newPos2 = 0.5 * ( newPos1 + SMESH_TNodeXYZ( tgtNode ));
8422 // tgtNode->setXYZ( newPos2.X(), newPos2.Y(), newPos2.Z() );
8423 // edgeF->_pos.back() = newPosF;
8424 // dumpMoveComm( tgtNode, "MoveNearConcaVer 2" ); // debug
8428 //================================================================================
8430 * \brief Perform smooth of _LayerEdge's based on EDGE's
8431 * \retval bool - true if node has been moved
8433 //================================================================================
8435 bool _LayerEdge::SmoothOnEdge(Handle(ShapeAnalysis_Surface)& surface,
8436 const TopoDS_Face& F,
8437 SMESH_MesherHelper& helper)
8439 ASSERT( IsOnEdge() );
8441 SMDS_MeshNode* tgtNode = const_cast<SMDS_MeshNode*>( _nodes.back() );
8442 SMESH_TNodeXYZ oldPos( tgtNode );
8443 double dist01, distNewOld;
8445 SMESH_TNodeXYZ p0( _2neibors->tgtNode(0));
8446 SMESH_TNodeXYZ p1( _2neibors->tgtNode(1));
8447 dist01 = p0.Distance( _2neibors->tgtNode(1) );
8449 gp_Pnt newPos = p0 * _2neibors->_wgt[0] + p1 * _2neibors->_wgt[1];
8450 double lenDelta = 0;
8453 //lenDelta = _curvature->lenDelta( _len );
8454 lenDelta = _curvature->lenDeltaByDist( dist01 );
8455 newPos.ChangeCoord() += _normal * lenDelta;
8458 distNewOld = newPos.Distance( oldPos );
8462 if ( _2neibors->_plnNorm )
8464 // put newPos on the plane defined by source node and _plnNorm
8465 gp_XYZ new2src = SMESH_TNodeXYZ( _nodes[0] ) - newPos.XYZ();
8466 double new2srcProj = (*_2neibors->_plnNorm) * new2src;
8467 newPos.ChangeCoord() += (*_2neibors->_plnNorm) * new2srcProj;
8469 tgtNode->setXYZ( newPos.X(), newPos.Y(), newPos.Z() );
8470 _pos.back() = newPos.XYZ();
8474 tgtNode->setXYZ( newPos.X(), newPos.Y(), newPos.Z() );
8475 gp_XY uv( Precision::Infinite(), 0 );
8476 helper.CheckNodeUV( F, tgtNode, uv, 1e-10, /*force=*/true );
8477 _pos.back().SetCoord( uv.X(), uv.Y(), 0 );
8479 newPos = surface->Value( uv );
8480 tgtNode->setXYZ( newPos.X(), newPos.Y(), newPos.Z() );
8483 // commented for IPAL0052478
8484 // if ( _curvature && lenDelta < 0 )
8486 // gp_Pnt prevPos( _pos[ _pos.size()-2 ]);
8487 // _len -= prevPos.Distance( oldPos );
8488 // _len += prevPos.Distance( newPos );
8490 bool moved = distNewOld > dist01/50;
8492 dumpMove( tgtNode ); // debug
8497 //================================================================================
8499 * \brief Perform 3D smooth of nodes inflated from FACE. No check of validity
8501 //================================================================================
8503 void _LayerEdge::SmoothWoCheck()
8505 if ( Is( DIFFICULT ))
8508 bool moved = Is( SMOOTHED );
8509 for ( size_t i = 0; i < _neibors.size() && !moved; ++i )
8510 moved = _neibors[i]->Is( SMOOTHED );
8514 gp_XYZ newPos = (this->*_smooFunction)(); // fun chosen by ChooseSmooFunction()
8516 SMDS_MeshNode* n = const_cast< SMDS_MeshNode* >( _nodes.back() );
8517 n->setXYZ( newPos.X(), newPos.Y(), newPos.Z());
8518 _pos.back() = newPos;
8520 dumpMoveComm( n, SMESH_Comment("No check - ") << _funNames[ smooFunID() ]);
8523 //================================================================================
8525 * \brief Checks validity of _neibors on EDGEs and VERTEXes
8527 //================================================================================
8529 int _LayerEdge::CheckNeiborsOnBoundary( vector< _LayerEdge* >* badNeibors, bool * needSmooth )
8531 if ( ! Is( NEAR_BOUNDARY ))
8536 for ( size_t iN = 0; iN < _neibors.size(); ++iN )
8538 _LayerEdge* eN = _neibors[iN];
8539 if ( eN->_nodes[0]->getshapeId() == _nodes[0]->getshapeId() )
8542 *needSmooth |= ( eN->Is( _LayerEdge::BLOCKED ) ||
8543 eN->Is( _LayerEdge::NORMAL_UPDATED ) ||
8544 eN->_pos.size() != _pos.size() );
8546 SMESH_TNodeXYZ curPosN ( eN->_nodes.back() );
8547 SMESH_TNodeXYZ prevPosN( eN->_nodes[0] );
8548 for ( size_t i = 0; i < eN->_simplices.size(); ++i )
8549 if ( eN->_nodes.size() > 1 &&
8550 eN->_simplices[i].Includes( _nodes.back() ) &&
8551 !eN->_simplices[i].IsForward( &prevPosN, &curPosN, vol ))
8556 badNeibors->push_back( eN );
8557 debugMsg("Bad boundary simplex ( "
8558 << " "<< eN->_nodes[0]->GetID()
8559 << " "<< eN->_nodes.back()->GetID()
8560 << " "<< eN->_simplices[i]._nPrev->GetID()
8561 << " "<< eN->_simplices[i]._nNext->GetID() << " )" );
8572 //================================================================================
8574 * \brief Perform 'smart' 3D smooth of nodes inflated from FACE
8575 * \retval int - nb of bad simplices around this _LayerEdge
8577 //================================================================================
8579 int _LayerEdge::Smooth(const int step, bool findBest, vector< _LayerEdge* >& toSmooth )
8581 if ( !Is( MOVED ) || Is( SMOOTHED ) || Is( BLOCKED ))
8582 return 0; // shape of simplices not changed
8583 if ( _simplices.size() < 2 )
8584 return 0; // _LayerEdge inflated along EDGE or FACE
8586 if ( Is( DIFFICULT )) // || Is( ON_CONCAVE_FACE )
8589 const gp_XYZ& curPos = _pos.back();
8590 const gp_XYZ& prevPos = _pos[0]; //PrevPos();
8592 // quality metrics (orientation) of tetras around _tgtNode
8594 double vol, minVolBefore = 1e100;
8595 for ( size_t i = 0; i < _simplices.size(); ++i )
8597 nbOkBefore += _simplices[i].IsForward( &prevPos, &curPos, vol );
8598 minVolBefore = Min( minVolBefore, vol );
8600 int nbBad = _simplices.size() - nbOkBefore;
8602 bool bndNeedSmooth = false;
8604 nbBad = CheckNeiborsOnBoundary( 0, & bndNeedSmooth );
8608 // evaluate min angle
8609 if ( nbBad == 0 && !findBest && !bndNeedSmooth )
8611 size_t nbGoodAngles = _simplices.size();
8613 for ( size_t i = 0; i < _simplices.size(); ++i )
8615 if ( !_simplices[i].IsMinAngleOK( curPos, angle ) && angle > _minAngle )
8618 if ( nbGoodAngles == _simplices.size() )
8624 if ( Is( ON_CONCAVE_FACE ))
8627 if ( step % 2 == 0 )
8630 if ( Is( ON_CONCAVE_FACE ) && !findBest ) // alternate FUN_CENTROIDAL and FUN_LAPLACIAN
8632 if ( _smooFunction == _funs[ FUN_LAPLACIAN ] )
8633 _smooFunction = _funs[ FUN_CENTROIDAL ];
8635 _smooFunction = _funs[ FUN_LAPLACIAN ];
8638 // compute new position for the last _pos using different _funs
8641 for ( int iFun = -1; iFun < theNbSmooFuns; ++iFun )
8644 newPos = (this->*_smooFunction)(); // fun chosen by ChooseSmooFunction()
8645 else if ( _funs[ iFun ] == _smooFunction )
8646 continue; // _smooFunction again
8647 else if ( step > 1 )
8648 newPos = (this->*_funs[ iFun ])(); // try other smoothing fun
8650 break; // let "easy" functions improve elements around distorted ones
8654 double delta = _curvature->lenDelta( _len );
8656 newPos += _normal * delta;
8659 double segLen = _normal * ( newPos - prevPos );
8660 if ( segLen + delta > 0 )
8661 newPos += _normal * delta;
8663 // double segLenChange = _normal * ( curPos - newPos );
8664 // newPos += 0.5 * _normal * segLenChange;
8668 double minVolAfter = 1e100;
8669 for ( size_t i = 0; i < _simplices.size(); ++i )
8671 nbOkAfter += _simplices[i].IsForward( &prevPos, &newPos, vol );
8672 minVolAfter = Min( minVolAfter, vol );
8675 if ( nbOkAfter < nbOkBefore )
8679 ( nbOkAfter == nbOkBefore ) &&
8680 ( minVolAfter <= minVolBefore ))
8683 nbBad = _simplices.size() - nbOkAfter;
8684 minVolBefore = minVolAfter;
8685 nbOkBefore = nbOkAfter;
8688 SMDS_MeshNode* n = const_cast< SMDS_MeshNode* >( _nodes.back() );
8689 n->setXYZ( newPos.X(), newPos.Y(), newPos.Z());
8690 _pos.back() = newPos;
8692 dumpMoveComm( n, SMESH_Comment( _funNames[ iFun < 0 ? smooFunID() : iFun ] )
8693 << (nbBad ? " --BAD" : ""));
8697 continue; // look for a better function
8703 } // loop on smoothing functions
8705 if ( moved ) // notify _neibors
8708 for ( size_t i = 0; i < _neibors.size(); ++i )
8709 if ( !_neibors[i]->Is( MOVED ))
8711 _neibors[i]->Set( MOVED );
8712 toSmooth.push_back( _neibors[i] );
8719 //================================================================================
8721 * \brief Perform 'smart' 3D smooth of nodes inflated from FACE
8722 * \retval int - nb of bad simplices around this _LayerEdge
8724 //================================================================================
8726 int _LayerEdge::Smooth(const int step, const bool isConcaveFace, bool findBest )
8728 if ( !_smooFunction )
8729 return 0; // _LayerEdge inflated along EDGE or FACE
8731 return 0; // not inflated
8733 const gp_XYZ& curPos = _pos.back();
8734 const gp_XYZ& prevPos = _pos[0]; //PrevCheckPos();
8736 // quality metrics (orientation) of tetras around _tgtNode
8738 double vol, minVolBefore = 1e100;
8739 for ( size_t i = 0; i < _simplices.size(); ++i )
8741 nbOkBefore += _simplices[i].IsForward( &prevPos, &curPos, vol );
8742 minVolBefore = Min( minVolBefore, vol );
8744 int nbBad = _simplices.size() - nbOkBefore;
8746 if ( isConcaveFace ) // alternate FUN_CENTROIDAL and FUN_LAPLACIAN
8748 if ( _smooFunction == _funs[ FUN_CENTROIDAL ] && step % 2 )
8749 _smooFunction = _funs[ FUN_LAPLACIAN ];
8750 else if ( _smooFunction == _funs[ FUN_LAPLACIAN ] && !( step % 2 ))
8751 _smooFunction = _funs[ FUN_CENTROIDAL ];
8754 // compute new position for the last _pos using different _funs
8756 for ( int iFun = -1; iFun < theNbSmooFuns; ++iFun )
8759 newPos = (this->*_smooFunction)(); // fun chosen by ChooseSmooFunction()
8760 else if ( _funs[ iFun ] == _smooFunction )
8761 continue; // _smooFunction again
8762 else if ( step > 1 )
8763 newPos = (this->*_funs[ iFun ])(); // try other smoothing fun
8765 break; // let "easy" functions improve elements around distorted ones
8769 double delta = _curvature->lenDelta( _len );
8771 newPos += _normal * delta;
8774 double segLen = _normal * ( newPos - prevPos );
8775 if ( segLen + delta > 0 )
8776 newPos += _normal * delta;
8778 // double segLenChange = _normal * ( curPos - newPos );
8779 // newPos += 0.5 * _normal * segLenChange;
8783 double minVolAfter = 1e100;
8784 for ( size_t i = 0; i < _simplices.size(); ++i )
8786 nbOkAfter += _simplices[i].IsForward( &prevPos, &newPos, vol );
8787 minVolAfter = Min( minVolAfter, vol );
8790 if ( nbOkAfter < nbOkBefore )
8792 if (( isConcaveFace || findBest ) &&
8793 ( nbOkAfter == nbOkBefore ) &&
8794 ( minVolAfter <= minVolBefore )
8798 nbBad = _simplices.size() - nbOkAfter;
8799 minVolBefore = minVolAfter;
8800 nbOkBefore = nbOkAfter;
8802 SMDS_MeshNode* n = const_cast< SMDS_MeshNode* >( _nodes.back() );
8803 n->setXYZ( newPos.X(), newPos.Y(), newPos.Z());
8804 _pos.back() = newPos;
8806 dumpMoveComm( n, SMESH_Comment( _funNames[ iFun < 0 ? smooFunID() : iFun ] )
8807 << ( nbBad ? "--BAD" : ""));
8809 // commented for IPAL0052478
8810 // _len -= prevPos.Distance(SMESH_TNodeXYZ( n ));
8811 // _len += prevPos.Distance(newPos);
8813 if ( iFun > -1 ) // findBest || the chosen _fun makes worse
8815 //_smooFunction = _funs[ iFun ];
8816 // cout << "# " << _funNames[ iFun ] << "\t N:" << _nodes.back()->GetID()
8817 // << "\t nbBad: " << _simplices.size() - nbOkAfter
8818 // << " minVol: " << minVolAfter
8819 // << " " << newPos.X() << " " << newPos.Y() << " " << newPos.Z()
8821 continue; // look for a better function
8827 } // loop on smoothing functions
8832 //================================================================================
8834 * \brief Chooses a smoothing technique giving a position most close to an initial one.
8835 * For a correct result, _simplices must contain nodes lying on geometry.
8837 //================================================================================
8839 void _LayerEdge::ChooseSmooFunction( const set< TGeomID >& concaveVertices,
8840 const TNode2Edge& n2eMap)
8842 if ( _smooFunction ) return;
8844 // use smoothNefPolygon() near concaveVertices
8845 if ( !concaveVertices.empty() )
8847 _smooFunction = _funs[ FUN_CENTROIDAL ];
8849 Set( ON_CONCAVE_FACE );
8851 for ( size_t i = 0; i < _simplices.size(); ++i )
8853 if ( concaveVertices.count( _simplices[i]._nPrev->getshapeId() ))
8855 _smooFunction = _funs[ FUN_NEFPOLY ];
8857 // set FUN_CENTROIDAL to neighbor edges
8858 for ( i = 0; i < _neibors.size(); ++i )
8860 if ( _neibors[i]->_nodes[0]->GetPosition()->GetDim() == 2 )
8862 _neibors[i]->_smooFunction = _funs[ FUN_CENTROIDAL ];
8869 // // this choice is done only if ( !concaveVertices.empty() ) for Grids/smesh/bugs_19/X1
8870 // // where the nodes are smoothed too far along a sphere thus creating
8871 // // inverted _simplices
8872 // double dist[theNbSmooFuns];
8873 // //double coef[theNbSmooFuns] = { 1., 1.2, 1.4, 1.4 };
8874 // double coef[theNbSmooFuns] = { 1., 1., 1., 1. };
8876 // double minDist = Precision::Infinite();
8877 // gp_Pnt p = SMESH_TNodeXYZ( _nodes[0] );
8878 // for ( int i = 0; i < FUN_NEFPOLY; ++i )
8880 // gp_Pnt newP = (this->*_funs[i])();
8881 // dist[i] = p.SquareDistance( newP );
8882 // if ( dist[i]*coef[i] < minDist )
8884 // _smooFunction = _funs[i];
8885 // minDist = dist[i]*coef[i];
8891 _smooFunction = _funs[ FUN_LAPLACIAN ];
8894 // for ( size_t i = 0; i < _simplices.size(); ++i )
8895 // minDim = Min( minDim, _simplices[i]._nPrev->GetPosition()->GetDim() );
8896 // if ( minDim == 0 )
8897 // _smooFunction = _funs[ FUN_CENTROIDAL ];
8898 // else if ( minDim == 1 )
8899 // _smooFunction = _funs[ FUN_CENTROIDAL ];
8903 // for ( int i = 0; i < FUN_NB; ++i )
8905 // //cout << dist[i] << " ";
8906 // if ( _smooFunction == _funs[i] ) {
8908 // //debugMsg( fNames[i] );
8912 // cout << _funNames[ iMin ] << "\t N:" << _nodes.back()->GetID() << endl;
8915 //================================================================================
8917 * \brief Returns a name of _SmooFunction
8919 //================================================================================
8921 int _LayerEdge::smooFunID( _LayerEdge::PSmooFun fun) const
8924 fun = _smooFunction;
8925 for ( int i = 0; i < theNbSmooFuns; ++i )
8926 if ( fun == _funs[i] )
8929 return theNbSmooFuns;
8932 //================================================================================
8934 * \brief Computes a new node position using Laplacian smoothing
8936 //================================================================================
8938 gp_XYZ _LayerEdge::smoothLaplacian()
8940 gp_XYZ newPos (0,0,0);
8941 for ( size_t i = 0; i < _simplices.size(); ++i )
8942 newPos += SMESH_TNodeXYZ( _simplices[i]._nPrev );
8943 newPos /= _simplices.size();
8948 //================================================================================
8950 * \brief Computes a new node position using angular-based smoothing
8952 //================================================================================
8954 gp_XYZ _LayerEdge::smoothAngular()
8956 vector< gp_Vec > edgeDir; edgeDir. reserve( _simplices.size() + 1 );
8957 vector< double > edgeSize; edgeSize.reserve( _simplices.size() );
8958 vector< gp_XYZ > points; points. reserve( _simplices.size() + 1 );
8960 gp_XYZ pPrev = SMESH_TNodeXYZ( _simplices.back()._nPrev );
8962 for ( size_t i = 0; i < _simplices.size(); ++i )
8964 gp_XYZ p = SMESH_TNodeXYZ( _simplices[i]._nPrev );
8965 edgeDir.push_back( p - pPrev );
8966 edgeSize.push_back( edgeDir.back().Magnitude() );
8967 if ( edgeSize.back() < numeric_limits<double>::min() )
8970 edgeSize.pop_back();
8974 edgeDir.back() /= edgeSize.back();
8975 points.push_back( p );
8980 edgeDir.push_back ( edgeDir[0] );
8981 edgeSize.push_back( edgeSize[0] );
8982 pN /= points.size();
8984 gp_XYZ newPos(0,0,0);
8986 for ( size_t i = 0; i < points.size(); ++i )
8988 gp_Vec toN = pN - points[i];
8989 double toNLen = toN.Magnitude();
8990 if ( toNLen < numeric_limits<double>::min() )
8995 gp_Vec bisec = edgeDir[i] + edgeDir[i+1];
8996 double bisecLen = bisec.SquareMagnitude();
8997 if ( bisecLen < numeric_limits<double>::min() )
8999 gp_Vec norm = edgeDir[i] ^ toN;
9000 bisec = norm ^ edgeDir[i];
9001 bisecLen = bisec.SquareMagnitude();
9003 bisecLen = Sqrt( bisecLen );
9007 gp_XYZ pNew = ( points[i] + bisec.XYZ() * toNLen ) * bisecLen;
9008 sumSize += bisecLen;
9010 gp_XYZ pNew = ( points[i] + bisec.XYZ() * toNLen ) * ( edgeSize[i] + edgeSize[i+1] );
9011 sumSize += ( edgeSize[i] + edgeSize[i+1] );
9017 // project newPos to an average plane
9019 gp_XYZ norm(0,0,0); // plane normal
9020 points.push_back( points[0] );
9021 for ( size_t i = 1; i < points.size(); ++i )
9023 gp_XYZ vec1 = points[ i-1 ] - pN;
9024 gp_XYZ vec2 = points[ i ] - pN;
9025 gp_XYZ cross = vec1 ^ vec2;
9028 if ( cross * norm < numeric_limits<double>::min() )
9029 norm += cross.Reversed();
9033 catch (Standard_Failure) { // if |cross| == 0.
9036 gp_XYZ vec = newPos - pN;
9037 double r = ( norm * vec ) / norm.SquareModulus(); // param [0,1] on norm
9038 newPos = newPos - r * norm;
9043 //================================================================================
9045 * \brief Computes a new node position using weighted node positions
9047 //================================================================================
9049 gp_XYZ _LayerEdge::smoothLengthWeighted()
9051 vector< double > edgeSize; edgeSize.reserve( _simplices.size() + 1);
9052 vector< gp_XYZ > points; points. reserve( _simplices.size() );
9054 gp_XYZ pPrev = SMESH_TNodeXYZ( _simplices.back()._nPrev );
9055 for ( size_t i = 0; i < _simplices.size(); ++i )
9057 gp_XYZ p = SMESH_TNodeXYZ( _simplices[i]._nPrev );
9058 edgeSize.push_back( ( p - pPrev ).Modulus() );
9059 if ( edgeSize.back() < numeric_limits<double>::min() )
9061 edgeSize.pop_back();
9065 points.push_back( p );
9069 edgeSize.push_back( edgeSize[0] );
9071 gp_XYZ newPos(0,0,0);
9073 for ( size_t i = 0; i < points.size(); ++i )
9075 newPos += points[i] * ( edgeSize[i] + edgeSize[i+1] );
9076 sumSize += edgeSize[i] + edgeSize[i+1];
9082 //================================================================================
9084 * \brief Computes a new node position using angular-based smoothing
9086 //================================================================================
9088 gp_XYZ _LayerEdge::smoothCentroidal()
9090 gp_XYZ newPos(0,0,0);
9091 gp_XYZ pN = SMESH_TNodeXYZ( _nodes.back() );
9093 for ( size_t i = 0; i < _simplices.size(); ++i )
9095 gp_XYZ p1 = SMESH_TNodeXYZ( _simplices[i]._nPrev );
9096 gp_XYZ p2 = SMESH_TNodeXYZ( _simplices[i]._nNext );
9097 gp_XYZ gc = ( pN + p1 + p2 ) / 3.;
9098 double size = (( p1 - pN ) ^ ( p2 - pN )).Modulus();
9101 newPos += gc * size;
9108 //================================================================================
9110 * \brief Computes a new node position located inside a Nef polygon
9112 //================================================================================
9114 gp_XYZ _LayerEdge::smoothNefPolygon()
9115 #ifdef OLD_NEF_POLYGON
9117 gp_XYZ newPos(0,0,0);
9119 // get a plane to search a solution on
9121 vector< gp_XYZ > vecs( _simplices.size() + 1 );
9123 const double tol = numeric_limits<double>::min();
9124 gp_XYZ center(0,0,0);
9125 for ( i = 0; i < _simplices.size(); ++i )
9127 vecs[i] = ( SMESH_TNodeXYZ( _simplices[i]._nNext ) -
9128 SMESH_TNodeXYZ( _simplices[i]._nPrev ));
9129 center += SMESH_TNodeXYZ( _simplices[i]._nPrev );
9131 vecs.back() = vecs[0];
9132 center /= _simplices.size();
9134 gp_XYZ zAxis(0,0,0);
9135 for ( i = 0; i < _simplices.size(); ++i )
9136 zAxis += vecs[i] ^ vecs[i+1];
9139 for ( i = 0; i < _simplices.size(); ++i )
9142 if ( yAxis.SquareModulus() > tol )
9145 gp_XYZ xAxis = yAxis ^ zAxis;
9146 // SMESH_TNodeXYZ p0( _simplices[0]._nPrev );
9147 // const double tol = 1e-6 * ( p0.Distance( _simplices[1]._nPrev ) +
9148 // p0.Distance( _simplices[2]._nPrev ));
9149 // gp_XYZ center = smoothLaplacian();
9150 // gp_XYZ xAxis, yAxis, zAxis;
9151 // for ( i = 0; i < _simplices.size(); ++i )
9153 // xAxis = SMESH_TNodeXYZ( _simplices[i]._nPrev ) - center;
9154 // if ( xAxis.SquareModulus() > tol*tol )
9157 // for ( i = 1; i < _simplices.size(); ++i )
9159 // yAxis = SMESH_TNodeXYZ( _simplices[i]._nPrev ) - center;
9160 // zAxis = xAxis ^ yAxis;
9161 // if ( zAxis.SquareModulus() > tol*tol )
9164 // if ( i == _simplices.size() ) return newPos;
9166 yAxis = zAxis ^ xAxis;
9167 xAxis /= xAxis.Modulus();
9168 yAxis /= yAxis.Modulus();
9170 // get half-planes of _simplices
9172 vector< _halfPlane > halfPlns( _simplices.size() );
9174 for ( size_t i = 0; i < _simplices.size(); ++i )
9176 gp_XYZ OP1 = SMESH_TNodeXYZ( _simplices[i]._nPrev ) - center;
9177 gp_XYZ OP2 = SMESH_TNodeXYZ( _simplices[i]._nNext ) - center;
9178 gp_XY p1( OP1 * xAxis, OP1 * yAxis );
9179 gp_XY p2( OP2 * xAxis, OP2 * yAxis );
9180 gp_XY vec12 = p2 - p1;
9181 double dist12 = vec12.Modulus();
9185 halfPlns[ nbHP ]._pos = p1;
9186 halfPlns[ nbHP ]._dir = vec12;
9187 halfPlns[ nbHP ]._inNorm.SetCoord( -vec12.Y(), vec12.X() );
9191 // intersect boundaries of half-planes, define state of intersection points
9192 // in relation to all half-planes and calculate internal point of a 2D polygon
9195 gp_XY newPos2D (0,0);
9197 enum { UNDEF = -1, NOT_OUT, IS_OUT, NO_INT };
9198 typedef std::pair< gp_XY, int > TIntPntState; // coord and isOut state
9199 TIntPntState undefIPS( gp_XY(1e100,1e100), UNDEF );
9201 vector< vector< TIntPntState > > allIntPnts( nbHP );
9202 for ( int iHP1 = 0; iHP1 < nbHP; ++iHP1 )
9204 vector< TIntPntState > & intPnts1 = allIntPnts[ iHP1 ];
9205 if ( intPnts1.empty() ) intPnts1.resize( nbHP, undefIPS );
9207 int iPrev = SMESH_MesherHelper::WrapIndex( iHP1 - 1, nbHP );
9208 int iNext = SMESH_MesherHelper::WrapIndex( iHP1 + 1, nbHP );
9211 const gp_XY* segEnds[2] = { 0, 0 }; // NOT_OUT points
9213 for ( int iHP2 = 0; iHP2 < nbHP; ++iHP2 )
9215 if ( iHP1 == iHP2 ) continue;
9217 TIntPntState & ips1 = intPnts1[ iHP2 ];
9218 if ( ips1.second == UNDEF )
9220 // find an intersection point of boundaries of iHP1 and iHP2
9222 if ( iHP2 == iPrev ) // intersection with neighbors is known
9223 ips1.first = halfPlns[ iHP1 ]._pos;
9224 else if ( iHP2 == iNext )
9225 ips1.first = halfPlns[ iHP2 ]._pos;
9226 else if ( !halfPlns[ iHP1 ].FindIntersection( halfPlns[ iHP2 ], ips1.first ))
9227 ips1.second = NO_INT;
9229 // classify the found intersection point
9230 if ( ips1.second != NO_INT )
9232 ips1.second = NOT_OUT;
9233 for ( int i = 0; i < nbHP && ips1.second == NOT_OUT; ++i )
9234 if ( i != iHP1 && i != iHP2 &&
9235 halfPlns[ i ].IsOut( ips1.first, tol ))
9236 ips1.second = IS_OUT;
9238 vector< TIntPntState > & intPnts2 = allIntPnts[ iHP2 ];
9239 if ( intPnts2.empty() ) intPnts2.resize( nbHP, undefIPS );
9240 TIntPntState & ips2 = intPnts2[ iHP1 ];
9243 if ( ips1.second == NOT_OUT )
9246 segEnds[ bool(segEnds[0]) ] = & ips1.first;
9250 // find a NOT_OUT segment of boundary which is located between
9251 // two NOT_OUT int points
9254 continue; // no such a segment
9258 // sort points along the boundary
9259 map< double, TIntPntState* > ipsByParam;
9260 for ( int iHP2 = 0; iHP2 < nbHP; ++iHP2 )
9262 TIntPntState & ips1 = intPnts1[ iHP2 ];
9263 if ( ips1.second != NO_INT )
9265 gp_XY op = ips1.first - halfPlns[ iHP1 ]._pos;
9266 double param = op * halfPlns[ iHP1 ]._dir;
9267 ipsByParam.insert( make_pair( param, & ips1 ));
9270 // look for two neighboring NOT_OUT points
9272 map< double, TIntPntState* >::iterator u2ips = ipsByParam.begin();
9273 for ( ; u2ips != ipsByParam.end(); ++u2ips )
9275 TIntPntState & ips1 = *(u2ips->second);
9276 if ( ips1.second == NOT_OUT )
9277 segEnds[ bool( nbNotOut++ ) ] = & ips1.first;
9278 else if ( nbNotOut >= 2 )
9285 if ( nbNotOut >= 2 )
9287 double len = ( *segEnds[0] - *segEnds[1] ).Modulus();
9290 newPos2D += 0.5 * len * ( *segEnds[0] + *segEnds[1] );
9297 newPos = center + xAxis * newPos2D.X() + yAxis * newPos2D.Y();
9306 #else // OLD_NEF_POLYGON
9307 { ////////////////////////////////// NEW
9308 gp_XYZ newPos(0,0,0);
9310 // get a plane to search a solution on
9313 gp_XYZ center(0,0,0);
9314 for ( i = 0; i < _simplices.size(); ++i )
9315 center += SMESH_TNodeXYZ( _simplices[i]._nPrev );
9316 center /= _simplices.size();
9318 vector< gp_XYZ > vecs( _simplices.size() + 1 );
9319 for ( i = 0; i < _simplices.size(); ++i )
9320 vecs[i] = SMESH_TNodeXYZ( _simplices[i]._nPrev ) - center;
9321 vecs.back() = vecs[0];
9323 const double tol = numeric_limits<double>::min();
9324 gp_XYZ zAxis(0,0,0);
9325 for ( i = 0; i < _simplices.size(); ++i )
9327 gp_XYZ cross = vecs[i] ^ vecs[i+1];
9330 if ( cross * zAxis < tol )
9331 zAxis += cross.Reversed();
9335 catch (Standard_Failure) { // if |cross| == 0.
9340 for ( i = 0; i < _simplices.size(); ++i )
9343 if ( yAxis.SquareModulus() > tol )
9346 gp_XYZ xAxis = yAxis ^ zAxis;
9347 // SMESH_TNodeXYZ p0( _simplices[0]._nPrev );
9348 // const double tol = 1e-6 * ( p0.Distance( _simplices[1]._nPrev ) +
9349 // p0.Distance( _simplices[2]._nPrev ));
9350 // gp_XYZ center = smoothLaplacian();
9351 // gp_XYZ xAxis, yAxis, zAxis;
9352 // for ( i = 0; i < _simplices.size(); ++i )
9354 // xAxis = SMESH_TNodeXYZ( _simplices[i]._nPrev ) - center;
9355 // if ( xAxis.SquareModulus() > tol*tol )
9358 // for ( i = 1; i < _simplices.size(); ++i )
9360 // yAxis = SMESH_TNodeXYZ( _simplices[i]._nPrev ) - center;
9361 // zAxis = xAxis ^ yAxis;
9362 // if ( zAxis.SquareModulus() > tol*tol )
9365 // if ( i == _simplices.size() ) return newPos;
9367 yAxis = zAxis ^ xAxis;
9368 xAxis /= xAxis.Modulus();
9369 yAxis /= yAxis.Modulus();
9371 // get half-planes of _simplices
9373 vector< _halfPlane > halfPlns( _simplices.size() );
9375 for ( size_t i = 0; i < _simplices.size(); ++i )
9377 const gp_XYZ& OP1 = vecs[ i ];
9378 const gp_XYZ& OP2 = vecs[ i+1 ];
9379 gp_XY p1( OP1 * xAxis, OP1 * yAxis );
9380 gp_XY p2( OP2 * xAxis, OP2 * yAxis );
9381 gp_XY vec12 = p2 - p1;
9382 double dist12 = vec12.Modulus();
9386 halfPlns[ nbHP ]._pos = p1;
9387 halfPlns[ nbHP ]._dir = vec12;
9388 halfPlns[ nbHP ]._inNorm.SetCoord( -vec12.Y(), vec12.X() );
9392 // intersect boundaries of half-planes, define state of intersection points
9393 // in relation to all half-planes and calculate internal point of a 2D polygon
9396 gp_XY newPos2D (0,0);
9398 enum { UNDEF = -1, NOT_OUT, IS_OUT, NO_INT };
9399 typedef std::pair< gp_XY, int > TIntPntState; // coord and isOut state
9400 TIntPntState undefIPS( gp_XY(1e100,1e100), UNDEF );
9402 vector< vector< TIntPntState > > allIntPnts( nbHP );
9403 for ( int iHP1 = 0; iHP1 < nbHP; ++iHP1 )
9405 vector< TIntPntState > & intPnts1 = allIntPnts[ iHP1 ];
9406 if ( intPnts1.empty() ) intPnts1.resize( nbHP, undefIPS );
9408 int iPrev = SMESH_MesherHelper::WrapIndex( iHP1 - 1, nbHP );
9409 int iNext = SMESH_MesherHelper::WrapIndex( iHP1 + 1, nbHP );
9412 const gp_XY* segEnds[2] = { 0, 0 }; // NOT_OUT points
9414 for ( int iHP2 = 0; iHP2 < nbHP; ++iHP2 )
9416 if ( iHP1 == iHP2 ) continue;
9418 TIntPntState & ips1 = intPnts1[ iHP2 ];
9419 if ( ips1.second == UNDEF )
9421 // find an intersection point of boundaries of iHP1 and iHP2
9423 if ( iHP2 == iPrev ) // intersection with neighbors is known
9424 ips1.first = halfPlns[ iHP1 ]._pos;
9425 else if ( iHP2 == iNext )
9426 ips1.first = halfPlns[ iHP2 ]._pos;
9427 else if ( !halfPlns[ iHP1 ].FindIntersection( halfPlns[ iHP2 ], ips1.first ))
9428 ips1.second = NO_INT;
9430 // classify the found intersection point
9431 if ( ips1.second != NO_INT )
9433 ips1.second = NOT_OUT;
9434 for ( int i = 0; i < nbHP && ips1.second == NOT_OUT; ++i )
9435 if ( i != iHP1 && i != iHP2 &&
9436 halfPlns[ i ].IsOut( ips1.first, tol ))
9437 ips1.second = IS_OUT;
9439 vector< TIntPntState > & intPnts2 = allIntPnts[ iHP2 ];
9440 if ( intPnts2.empty() ) intPnts2.resize( nbHP, undefIPS );
9441 TIntPntState & ips2 = intPnts2[ iHP1 ];
9444 if ( ips1.second == NOT_OUT )
9447 segEnds[ bool(segEnds[0]) ] = & ips1.first;
9451 // find a NOT_OUT segment of boundary which is located between
9452 // two NOT_OUT int points
9455 continue; // no such a segment
9459 // sort points along the boundary
9460 map< double, TIntPntState* > ipsByParam;
9461 for ( int iHP2 = 0; iHP2 < nbHP; ++iHP2 )
9463 TIntPntState & ips1 = intPnts1[ iHP2 ];
9464 if ( ips1.second != NO_INT )
9466 gp_XY op = ips1.first - halfPlns[ iHP1 ]._pos;
9467 double param = op * halfPlns[ iHP1 ]._dir;
9468 ipsByParam.insert( make_pair( param, & ips1 ));
9471 // look for two neighboring NOT_OUT points
9473 map< double, TIntPntState* >::iterator u2ips = ipsByParam.begin();
9474 for ( ; u2ips != ipsByParam.end(); ++u2ips )
9476 TIntPntState & ips1 = *(u2ips->second);
9477 if ( ips1.second == NOT_OUT )
9478 segEnds[ bool( nbNotOut++ ) ] = & ips1.first;
9479 else if ( nbNotOut >= 2 )
9486 if ( nbNotOut >= 2 )
9488 double len = ( *segEnds[0] - *segEnds[1] ).Modulus();
9491 newPos2D += 0.5 * len * ( *segEnds[0] + *segEnds[1] );
9498 newPos = center + xAxis * newPos2D.X() + yAxis * newPos2D.Y();
9507 #endif // OLD_NEF_POLYGON
9509 //================================================================================
9511 * \brief Add a new segment to _LayerEdge during inflation
9513 //================================================================================
9515 void _LayerEdge::SetNewLength( double len, _EdgesOnShape& eos, SMESH_MesherHelper& helper )
9520 if ( len > _maxLen )
9523 Block( eos.GetData() );
9525 const double lenDelta = len - _len;
9526 if ( lenDelta < len * 1e-3 )
9528 Block( eos.GetData() );
9532 SMDS_MeshNode* n = const_cast< SMDS_MeshNode*>( _nodes.back() );
9533 gp_XYZ oldXYZ = SMESH_TNodeXYZ( n );
9535 if ( eos._hyp.IsOffsetMethod() )
9539 SMDS_ElemIteratorPtr faceIt = _nodes[0]->GetInverseElementIterator( SMDSAbs_Face );
9540 while ( faceIt->more() )
9542 const SMDS_MeshElement* face = faceIt->next();
9543 if ( !eos.GetNormal( face, faceNorm ))
9546 // translate plane of a face
9547 gp_XYZ baryCenter = oldXYZ + faceNorm.XYZ() * lenDelta;
9549 // find point of intersection of the face plane located at baryCenter
9550 // and _normal located at newXYZ
9551 double d = -( faceNorm.XYZ() * baryCenter ); // d of plane equation ax+by+cz+d=0
9552 double dot = ( faceNorm.XYZ() * _normal );
9553 if ( dot < std::numeric_limits<double>::min() )
9554 dot = lenDelta * 1e-3;
9555 double step = -( faceNorm.XYZ() * newXYZ + d ) / dot;
9556 newXYZ += step * _normal;
9558 _lenFactor = _normal * ( newXYZ - oldXYZ ) / lenDelta; // _lenFactor is used in InvalidateStep()
9562 newXYZ = oldXYZ + _normal * lenDelta * _lenFactor;
9565 n->setXYZ( newXYZ.X(), newXYZ.Y(), newXYZ.Z() );
9566 _pos.push_back( newXYZ );
9568 if ( !eos._sWOL.IsNull() )
9572 if ( eos.SWOLType() == TopAbs_EDGE )
9574 double u = Precision::Infinite(); // to force projection w/o distance check
9575 uvOK = helper.CheckNodeU( TopoDS::Edge( eos._sWOL ), n, u,
9576 /*tol=*/2*lenDelta, /*force=*/true, distXYZ );
9577 _pos.back().SetCoord( u, 0, 0 );
9578 if ( _nodes.size() > 1 && uvOK )
9580 SMDS_EdgePositionPtr pos = n->GetPosition();
9581 pos->SetUParameter( u );
9586 gp_XY uv( Precision::Infinite(), 0 );
9587 uvOK = helper.CheckNodeUV( TopoDS::Face( eos._sWOL ), n, uv,
9588 /*tol=*/2*lenDelta, /*force=*/true, distXYZ );
9589 _pos.back().SetCoord( uv.X(), uv.Y(), 0 );
9590 if ( _nodes.size() > 1 && uvOK )
9592 SMDS_FacePositionPtr pos = n->GetPosition();
9593 pos->SetUParameter( uv.X() );
9594 pos->SetVParameter( uv.Y() );
9599 n->setXYZ( distXYZ[1], distXYZ[2], distXYZ[3]);
9603 n->setXYZ( oldXYZ.X(), oldXYZ.Y(), oldXYZ.Z() );
9605 Block( eos.GetData() );
9613 if ( eos.ShapeType() != TopAbs_FACE )
9615 for ( size_t i = 0; i < _neibors.size(); ++i )
9616 //if ( _len > _neibors[i]->GetSmooLen() )
9617 _neibors[i]->Set( MOVED );
9621 dumpMove( n ); //debug
9624 //================================================================================
9626 * \brief Set BLOCKED flag and propagate limited _maxLen to _neibors
9628 //================================================================================
9630 void _LayerEdge::Block( _SolidData& data )
9632 //if ( Is( BLOCKED )) return;
9635 SMESH_Comment msg( "#BLOCK shape=");
9636 msg << data.GetShapeEdges( this )->_shapeID
9637 << ", nodes " << _nodes[0]->GetID() << ", " << _nodes.back()->GetID();
9638 dumpCmd( msg + " -- BEGIN");
9641 std::queue<_LayerEdge*> queue;
9644 gp_Pnt pSrc, pTgt, pSrcN, pTgtN;
9645 while ( !queue.empty() )
9647 _LayerEdge* edge = queue.front(); queue.pop();
9648 pSrc = SMESH_TNodeXYZ( edge->_nodes[0] );
9649 pTgt = SMESH_TNodeXYZ( edge->_nodes.back() );
9650 for ( size_t iN = 0; iN < edge->_neibors.size(); ++iN )
9652 _LayerEdge* neibor = edge->_neibors[iN];
9653 if ( neibor->_maxLen < edge->_maxLen * 1.01 )
9655 pSrcN = SMESH_TNodeXYZ( neibor->_nodes[0] );
9656 pTgtN = SMESH_TNodeXYZ( neibor->_nodes.back() );
9657 double minDist = pSrc.SquareDistance( pSrcN );
9658 minDist = Min( pTgt.SquareDistance( pTgtN ), minDist );
9659 minDist = Min( pSrc.SquareDistance( pTgtN ), minDist );
9660 minDist = Min( pTgt.SquareDistance( pSrcN ), minDist );
9661 double newMaxLen = edge->_maxLen + 0.5 * Sqrt( minDist );
9662 //if ( edge->_nodes[0]->getshapeId() == neibor->_nodes[0]->getshapeId() ) viscous_layers_00/A3
9664 //newMaxLen *= edge->_lenFactor / neibor->_lenFactor;
9665 // newMaxLen *= Min( edge->_lenFactor / neibor->_lenFactor,
9666 // neibor->_lenFactor / edge->_lenFactor );
9668 if ( neibor->_maxLen > newMaxLen )
9670 neibor->SetMaxLen( newMaxLen );
9671 if ( neibor->_maxLen < neibor->_len )
9673 _EdgesOnShape* eos = data.GetShapeEdges( neibor );
9674 int lastStep = neibor->Is( BLOCKED ) ? 1 : 0;
9675 while ( neibor->_len > neibor->_maxLen &&
9676 neibor->NbSteps() > lastStep )
9677 neibor->InvalidateStep( neibor->NbSteps(), *eos, /*restoreLength=*/true );
9678 neibor->SetNewLength( neibor->_maxLen, *eos, data.GetHelper() );
9679 //neibor->Block( data );
9681 queue.push( neibor );
9685 dumpCmd( msg + " -- END");
9688 //================================================================================
9690 * \brief Remove last inflation step
9692 //================================================================================
9694 void _LayerEdge::InvalidateStep( size_t curStep, const _EdgesOnShape& eos, bool restoreLength )
9696 if ( _pos.size() > curStep && _nodes.size() > 1 )
9698 _pos.resize( curStep );
9700 gp_Pnt nXYZ = _pos.back();
9701 SMDS_MeshNode* n = const_cast< SMDS_MeshNode*>( _nodes.back() );
9702 SMESH_TNodeXYZ curXYZ( n );
9703 if ( !eos._sWOL.IsNull() )
9705 TopLoc_Location loc;
9706 if ( eos.SWOLType() == TopAbs_EDGE )
9708 SMDS_EdgePositionPtr pos = n->GetPosition();
9709 pos->SetUParameter( nXYZ.X() );
9711 Handle(Geom_Curve) curve = BRep_Tool::Curve( TopoDS::Edge( eos._sWOL ), loc, f,l);
9712 nXYZ = curve->Value( nXYZ.X() ).Transformed( loc );
9716 SMDS_FacePositionPtr pos = n->GetPosition();
9717 pos->SetUParameter( nXYZ.X() );
9718 pos->SetVParameter( nXYZ.Y() );
9719 Handle(Geom_Surface) surface = BRep_Tool::Surface( TopoDS::Face(eos._sWOL), loc );
9720 nXYZ = surface->Value( nXYZ.X(), nXYZ.Y() ).Transformed( loc );
9723 n->setXYZ( nXYZ.X(), nXYZ.Y(), nXYZ.Z() );
9726 if ( restoreLength )
9728 if ( NbSteps() == 0 )
9730 else if ( IsOnFace() && Is( MOVED ))
9731 _len = ( nXYZ.XYZ() - SMESH_NodeXYZ( _nodes[0] )) * _normal;
9733 _len -= ( nXYZ.XYZ() - curXYZ ).Modulus() / _lenFactor;
9739 //================================================================================
9741 * \brief Return index of a _pos distant from _normal
9743 //================================================================================
9745 int _LayerEdge::GetSmoothedPos( const double tol )
9748 for ( size_t i = 1; i < _pos.size() && !iSmoothed; ++i )
9750 double normDist = ( _pos[i] - _pos[0] ).Crossed( _normal ).SquareModulus();
9751 if ( normDist > tol * tol )
9757 //================================================================================
9759 * \brief Smooth a path formed by _pos of a _LayerEdge smoothed on FACE
9761 //================================================================================
9763 void _LayerEdge::SmoothPos( const vector< double >& segLen, const double tol )
9765 if ( /*Is( NORMAL_UPDATED ) ||*/ _pos.size() <= 2 )
9768 // find the 1st smoothed _pos
9769 int iSmoothed = GetSmoothedPos( tol );
9770 if ( !iSmoothed ) return;
9772 gp_XYZ normal = _normal;
9773 if ( Is( NORMAL_UPDATED ))
9776 for ( size_t i = 0; i < _neibors.size(); ++i )
9778 if ( _neibors[i]->IsOnFace() )
9780 double dot = _normal * _neibors[i]->_normal;
9783 normal = _neibors[i]->_normal;
9789 for ( size_t i = 1; i < _pos.size(); ++i )
9791 normal = _pos[i] - _pos[0];
9792 double size = normal.Modulus();
9793 if ( size > RealSmall() )
9800 const double r = 0.2;
9801 for ( int iter = 0; iter < 50; ++iter )
9804 for ( size_t i = Max( 1, iSmoothed-1-iter ); i < _pos.size()-1; ++i )
9806 gp_XYZ midPos = 0.5 * ( _pos[i-1] + _pos[i+1] );
9807 gp_XYZ newPos = ( 1-r ) * midPos + r * _pos[i];
9809 double midLen = 0.5 * ( segLen[i-1] + segLen[i+1] );
9810 double newLen = ( 1-r ) * midLen + r * segLen[i];
9811 const_cast< double& >( segLen[i] ) = newLen;
9812 // check angle between normal and (_pos[i+1], _pos[i] )
9813 gp_XYZ posDir = _pos[i+1] - _pos[i];
9814 double size = posDir.SquareModulus();
9815 if ( size > RealSmall() )
9816 minDot = Min( minDot, ( normal * posDir ) * ( normal * posDir ) / size );
9818 if ( minDot > 0.5 * 0.5 )
9824 //================================================================================
9826 * \brief Print flags
9828 //================================================================================
9830 std::string _LayerEdge::DumpFlags() const
9833 for ( int flag = 1; flag < 0x1000000; flag *= 2 )
9834 if ( _flags & flag )
9836 EFlags f = (EFlags) flag;
9838 case TO_SMOOTH: dump << "TO_SMOOTH"; break;
9839 case MOVED: dump << "MOVED"; break;
9840 case SMOOTHED: dump << "SMOOTHED"; break;
9841 case DIFFICULT: dump << "DIFFICULT"; break;
9842 case ON_CONCAVE_FACE: dump << "ON_CONCAVE_FACE"; break;
9843 case BLOCKED: dump << "BLOCKED"; break;
9844 case INTERSECTED: dump << "INTERSECTED"; break;
9845 case NORMAL_UPDATED: dump << "NORMAL_UPDATED"; break;
9846 case UPD_NORMAL_CONV: dump << "UPD_NORMAL_CONV"; break;
9847 case MARKED: dump << "MARKED"; break;
9848 case MULTI_NORMAL: dump << "MULTI_NORMAL"; break;
9849 case NEAR_BOUNDARY: dump << "NEAR_BOUNDARY"; break;
9850 case SMOOTHED_C1: dump << "SMOOTHED_C1"; break;
9851 case DISTORTED: dump << "DISTORTED"; break;
9852 case RISKY_SWOL: dump << "RISKY_SWOL"; break;
9853 case SHRUNK: dump << "SHRUNK"; break;
9854 case UNUSED_FLAG: dump << "UNUSED_FLAG"; break;
9858 cout << dump << endl;
9863 //================================================================================
9865 * \brief Create layers of prisms
9867 //================================================================================
9869 bool _ViscousBuilder::refine(_SolidData& data)
9871 SMESH_MesherHelper& helper = data.GetHelper();
9872 helper.SetElementsOnShape(false);
9874 Handle(Geom_Curve) curve;
9875 Handle(ShapeAnalysis_Surface) surface;
9876 TopoDS_Edge geomEdge;
9877 TopoDS_Face geomFace;
9878 TopLoc_Location loc;
9881 vector< gp_XYZ > pos3D;
9882 bool isOnEdge, isTooConvexFace = false;
9883 TGeomID prevBaseId = -1;
9884 TNode2Edge* n2eMap = 0;
9885 TNode2Edge::iterator n2e;
9887 // Create intermediate nodes on each _LayerEdge
9889 for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
9891 _EdgesOnShape& eos = data._edgesOnShape[iS];
9892 if ( eos._edges.empty() ) continue;
9894 if ( eos._edges[0]->_nodes.size() < 2 )
9895 continue; // on _noShrinkShapes
9897 // get data of a shrink shape
9899 geomEdge.Nullify(); geomFace.Nullify();
9900 curve.Nullify(); surface.Nullify();
9901 if ( !eos._sWOL.IsNull() )
9903 isOnEdge = ( eos.SWOLType() == TopAbs_EDGE );
9906 geomEdge = TopoDS::Edge( eos._sWOL );
9907 curve = BRep_Tool::Curve( geomEdge, loc, f,l);
9911 geomFace = TopoDS::Face( eos._sWOL );
9912 surface = helper.GetSurface( geomFace );
9915 else if ( eos.ShapeType() == TopAbs_FACE && eos._toSmooth )
9917 geomFace = TopoDS::Face( eos._shape );
9918 surface = helper.GetSurface( geomFace );
9919 // propagate _toSmooth back to _eosC1, which was unset in findShapesToSmooth()
9920 for ( size_t i = 0; i < eos._eosC1.size(); ++i )
9921 eos._eosC1[ i ]->_toSmooth = true;
9923 isTooConvexFace = false;
9924 if ( _ConvexFace* cf = data.GetConvexFace( eos._shapeID ))
9925 isTooConvexFace = cf->_isTooCurved;
9928 vector< double > segLen;
9929 for ( size_t i = 0; i < eos._edges.size(); ++i )
9931 _LayerEdge& edge = *eos._edges[i];
9932 if ( edge._pos.size() < 2 )
9935 // get accumulated length of segments
9936 segLen.resize( edge._pos.size() );
9938 if ( eos._sWOL.IsNull() )
9940 bool useNormal = true;
9941 bool usePos = false;
9942 bool smoothed = false;
9943 double preci = 0.1 * edge._len;
9944 if ( eos._toSmooth && edge._pos.size() > 2 )
9946 smoothed = edge.GetSmoothedPos( preci );
9950 if ( !surface.IsNull() && !isTooConvexFace ) // edge smoothed on FACE
9952 useNormal = usePos = false;
9953 gp_Pnt2d uv = helper.GetNodeUV( geomFace, edge._nodes[0] );
9954 for ( size_t j = 1; j < edge._pos.size() && !useNormal; ++j )
9956 uv = surface->NextValueOfUV( uv, edge._pos[j], preci );
9957 if ( surface->Gap() < 2. * edge._len )
9958 segLen[j] = surface->Gap();
9964 else if ( !edge.Is( _LayerEdge::NORMAL_UPDATED ))
9966 #ifndef __NODES_AT_POS
9967 useNormal = usePos = false;
9968 edge._pos[1] = edge._pos.back();
9969 edge._pos.resize( 2 );
9971 segLen[ 1 ] = edge._len;
9974 if ( useNormal && edge.Is( _LayerEdge::NORMAL_UPDATED ))
9976 useNormal = usePos = false;
9977 _LayerEdge tmpEdge; // get original _normal
9978 tmpEdge._nodes.push_back( edge._nodes[0] );
9979 if ( !setEdgeData( tmpEdge, eos, helper, data ))
9982 for ( size_t j = 1; j < edge._pos.size(); ++j )
9983 segLen[j] = ( edge._pos[j] - edge._pos[0] ) * tmpEdge._normal;
9987 for ( size_t j = 1; j < edge._pos.size(); ++j )
9988 segLen[j] = ( edge._pos[j] - edge._pos[0] ) * edge._normal;
9992 for ( size_t j = 1; j < edge._pos.size(); ++j )
9993 segLen[j] = segLen[j-1] + ( edge._pos[j-1] - edge._pos[j] ).Modulus();
9997 bool swapped = ( edge._pos.size() > 2 );
10001 for ( size_t j = 1; j < edge._pos.size()-1; ++j )
10002 if ( segLen[j] > segLen.back() )
10004 segLen.erase( segLen.begin() + j );
10005 edge._pos.erase( edge._pos.begin() + j );
10008 else if ( segLen[j] < segLen[j-1] )
10010 std::swap( segLen[j], segLen[j-1] );
10011 std::swap( edge._pos[j], edge._pos[j-1] );
10016 // smooth a path formed by edge._pos
10017 #ifndef __NODES_AT_POS
10018 if (( smoothed ) /*&&
10019 ( eos.ShapeType() == TopAbs_FACE || edge.Is( _LayerEdge::SMOOTHED_C1 ))*/)
10020 edge.SmoothPos( segLen, preci );
10023 else if ( eos._isRegularSWOL ) // usual SWOL
10025 if ( edge.Is( _LayerEdge::SMOOTHED ))
10027 SMESH_NodeXYZ p0( edge._nodes[0] );
10028 for ( size_t j = 1; j < edge._pos.size(); ++j )
10030 gp_XYZ pj = surface->Value( edge._pos[j].X(), edge._pos[j].Y() ).XYZ();
10031 segLen[j] = ( pj - p0 ) * edge._normal;
10036 for ( size_t j = 1; j < edge._pos.size(); ++j )
10037 segLen[j] = segLen[j-1] + (edge._pos[j-1] - edge._pos[j] ).Modulus();
10040 else if ( !surface.IsNull() ) // SWOL surface with singularities
10042 pos3D.resize( edge._pos.size() );
10043 for ( size_t j = 0; j < edge._pos.size(); ++j )
10044 pos3D[j] = surface->Value( edge._pos[j].X(), edge._pos[j].Y() ).XYZ();
10046 for ( size_t j = 1; j < edge._pos.size(); ++j )
10047 segLen[j] = segLen[j-1] + ( pos3D[j-1] - pos3D[j] ).Modulus();
10050 // allocate memory for new nodes if it is not yet refined
10051 const SMDS_MeshNode* tgtNode = edge._nodes.back();
10052 if ( edge._nodes.size() == 2 )
10054 #ifdef __NODES_AT_POS
10055 int nbNodes = edge._pos.size();
10057 int nbNodes = eos._hyp.GetNumberLayers() + 1;
10059 edge._nodes.resize( nbNodes, 0 );
10060 edge._nodes[1] = 0;
10061 edge._nodes.back() = tgtNode;
10063 // restore shapePos of the last node by already treated _LayerEdge of another _SolidData
10064 const TGeomID baseShapeId = edge._nodes[0]->getshapeId();
10065 if ( baseShapeId != prevBaseId )
10067 map< TGeomID, TNode2Edge* >::iterator s2ne = data._s2neMap.find( baseShapeId );
10068 n2eMap = ( s2ne == data._s2neMap.end() ) ? 0 : s2ne->second;
10069 prevBaseId = baseShapeId;
10071 _LayerEdge* edgeOnSameNode = 0;
10072 bool useExistingPos = false;
10073 if ( n2eMap && (( n2e = n2eMap->find( edge._nodes[0] )) != n2eMap->end() ))
10075 edgeOnSameNode = n2e->second;
10076 useExistingPos = ( edgeOnSameNode->_len < edge._len );
10077 const gp_XYZ& otherTgtPos = edgeOnSameNode->_pos.back();
10078 SMDS_PositionPtr lastPos = tgtNode->GetPosition();
10081 SMDS_EdgePositionPtr epos = lastPos;
10082 epos->SetUParameter( otherTgtPos.X() );
10086 SMDS_FacePositionPtr fpos = lastPos;
10087 fpos->SetUParameter( otherTgtPos.X() );
10088 fpos->SetVParameter( otherTgtPos.Y() );
10091 // calculate height of the first layer
10093 const double T = segLen.back(); //data._hyp.GetTotalThickness();
10094 const double f = eos._hyp.GetStretchFactor();
10095 const int N = eos._hyp.GetNumberLayers();
10096 const double fPowN = pow( f, N );
10097 if ( fPowN - 1 <= numeric_limits<double>::min() )
10100 h0 = T * ( f - 1 )/( fPowN - 1 );
10102 const double zeroLen = std::numeric_limits<double>::min();
10104 // create intermediate nodes
10105 double hSum = 0, hi = h0/f;
10107 for ( size_t iStep = 1; iStep < edge._nodes.size(); ++iStep )
10109 // compute an intermediate position
10112 while ( hSum > segLen[iSeg] && iSeg < segLen.size()-1 )
10114 int iPrevSeg = iSeg-1;
10115 while ( fabs( segLen[iPrevSeg] - segLen[iSeg]) <= zeroLen && iPrevSeg > 0 )
10117 double r = ( segLen[iSeg] - hSum ) / ( segLen[iSeg] - segLen[iPrevSeg] );
10118 gp_Pnt pos = r * edge._pos[iPrevSeg] + (1-r) * edge._pos[iSeg];
10119 #ifdef __NODES_AT_POS
10120 pos = edge._pos[ iStep ];
10122 SMDS_MeshNode*& node = const_cast< SMDS_MeshNode*& >( edge._nodes[ iStep ]);
10123 if ( !eos._sWOL.IsNull() )
10125 // compute XYZ by parameters <pos>
10130 pos = curve->Value( u ).Transformed(loc);
10132 else if ( eos._isRegularSWOL )
10134 uv.SetCoord( pos.X(), pos.Y() );
10136 pos = surface->Value( pos.X(), pos.Y() );
10140 uv.SetCoord( pos.X(), pos.Y() );
10141 gp_Pnt p = r * pos3D[ iPrevSeg ] + (1-r) * pos3D[ iSeg ];
10142 uv = surface->NextValueOfUV( uv, p, BRep_Tool::Tolerance( geomFace )).XY();
10144 pos = surface->Value( uv );
10147 // create or update the node
10150 node = helper.AddNode( pos.X(), pos.Y(), pos.Z());
10151 if ( !eos._sWOL.IsNull() )
10154 getMeshDS()->SetNodeOnEdge( node, geomEdge, u );
10156 getMeshDS()->SetNodeOnFace( node, geomFace, uv.X(), uv.Y() );
10160 getMeshDS()->SetNodeInVolume( node, helper.GetSubShapeID() );
10165 if ( !eos._sWOL.IsNull() )
10167 // make average pos from new and current parameters
10170 //u = 0.5 * ( u + helper.GetNodeU( geomEdge, node ));
10171 if ( useExistingPos )
10172 u = helper.GetNodeU( geomEdge, node );
10173 pos = curve->Value( u ).Transformed(loc);
10175 SMDS_EdgePositionPtr epos = node->GetPosition();
10176 epos->SetUParameter( u );
10180 //uv = 0.5 * ( uv + helper.GetNodeUV( geomFace, node ));
10181 if ( useExistingPos )
10182 uv = helper.GetNodeUV( geomFace, node );
10183 pos = surface->Value( uv );
10185 SMDS_FacePositionPtr fpos = node->GetPosition();
10186 fpos->SetUParameter( uv.X() );
10187 fpos->SetVParameter( uv.Y() );
10190 node->setXYZ( pos.X(), pos.Y(), pos.Z() );
10192 } // loop on edge._nodes
10194 if ( !eos._sWOL.IsNull() ) // prepare for shrink()
10197 edge._pos.back().SetCoord( u, 0,0);
10199 edge._pos.back().SetCoord( uv.X(), uv.Y() ,0);
10201 if ( edgeOnSameNode )
10202 edgeOnSameNode->_pos.back() = edge._pos.back();
10205 } // loop on eos._edges to create nodes
10208 if ( !getMeshDS()->IsEmbeddedMode() )
10209 // Log node movement
10210 for ( size_t i = 0; i < eos._edges.size(); ++i )
10212 SMESH_TNodeXYZ p ( eos._edges[i]->_nodes.back() );
10213 getMeshDS()->MoveNode( p._node, p.X(), p.Y(), p.Z() );
10220 helper.SetElementsOnShape(true);
10222 vector< vector<const SMDS_MeshNode*>* > nnVec;
10223 set< vector<const SMDS_MeshNode*>* > nnSet;
10224 set< int > degenEdgeInd;
10225 vector<const SMDS_MeshElement*> degenVols;
10227 TopExp_Explorer exp( data._solid, TopAbs_FACE );
10228 for ( ; exp.More(); exp.Next() )
10230 const TGeomID faceID = getMeshDS()->ShapeToIndex( exp.Current() );
10231 if ( data._ignoreFaceIds.count( faceID ))
10233 const bool isReversedFace = data._reversedFaceIds.count( faceID );
10234 SMESHDS_SubMesh* fSubM = getMeshDS()->MeshElements( exp.Current() );
10235 SMDS_ElemIteratorPtr fIt = fSubM->GetElements();
10236 while ( fIt->more() )
10238 const SMDS_MeshElement* face = fIt->next();
10239 const int nbNodes = face->NbCornerNodes();
10240 nnVec.resize( nbNodes );
10242 degenEdgeInd.clear();
10243 size_t maxZ = 0, minZ = std::numeric_limits<size_t>::max();
10244 SMDS_NodeIteratorPtr nIt = face->nodeIterator();
10245 for ( int iN = 0; iN < nbNodes; ++iN )
10247 const SMDS_MeshNode* n = nIt->next();
10248 _LayerEdge* edge = data._n2eMap[ n ];
10249 const int i = isReversedFace ? nbNodes-1-iN : iN;
10250 nnVec[ i ] = & edge->_nodes;
10251 maxZ = std::max( maxZ, nnVec[ i ]->size() );
10252 minZ = std::min( minZ, nnVec[ i ]->size() );
10254 if ( helper.HasDegeneratedEdges() )
10255 nnSet.insert( nnVec[ i ]);
10260 if ( 0 < nnSet.size() && nnSet.size() < 3 )
10268 for ( size_t iZ = 1; iZ < minZ; ++iZ )
10269 helper.AddVolume( (*nnVec[0])[iZ-1], (*nnVec[1])[iZ-1], (*nnVec[2])[iZ-1],
10270 (*nnVec[0])[iZ], (*nnVec[1])[iZ], (*nnVec[2])[iZ]);
10272 for ( size_t iZ = minZ; iZ < maxZ; ++iZ )
10274 for ( int iN = 0; iN < nbNodes; ++iN )
10275 if ( nnVec[ iN ]->size() < iZ+1 )
10276 degenEdgeInd.insert( iN );
10278 if ( degenEdgeInd.size() == 1 ) // PYRAM
10280 int i2 = *degenEdgeInd.begin();
10281 int i0 = helper.WrapIndex( i2 - 1, nbNodes );
10282 int i1 = helper.WrapIndex( i2 + 1, nbNodes );
10283 helper.AddVolume( (*nnVec[i0])[iZ-1], (*nnVec[i1])[iZ-1],
10284 (*nnVec[i1])[iZ ], (*nnVec[i0])[iZ ], (*nnVec[i2]).back());
10288 int i3 = !degenEdgeInd.count(0) ? 0 : !degenEdgeInd.count(1) ? 1 : 2;
10289 helper.AddVolume( (*nnVec[ 0 ])[ i3 == 0 ? iZ-1 : nnVec[0]->size()-1 ],
10290 (*nnVec[ 1 ])[ i3 == 1 ? iZ-1 : nnVec[1]->size()-1 ],
10291 (*nnVec[ 2 ])[ i3 == 2 ? iZ-1 : nnVec[2]->size()-1 ],
10292 (*nnVec[ i3 ])[ iZ ]);
10300 for ( size_t iZ = 1; iZ < minZ; ++iZ )
10301 helper.AddVolume( (*nnVec[0])[iZ-1], (*nnVec[1])[iZ-1],
10302 (*nnVec[2])[iZ-1], (*nnVec[3])[iZ-1],
10303 (*nnVec[0])[iZ], (*nnVec[1])[iZ],
10304 (*nnVec[2])[iZ], (*nnVec[3])[iZ]);
10306 for ( size_t iZ = minZ; iZ < maxZ; ++iZ )
10308 for ( int iN = 0; iN < nbNodes; ++iN )
10309 if ( nnVec[ iN ]->size() < iZ+1 )
10310 degenEdgeInd.insert( iN );
10312 switch ( degenEdgeInd.size() )
10316 int i2 = *degenEdgeInd.begin();
10317 int i3 = *degenEdgeInd.rbegin();
10318 bool ok = ( i3 - i2 == 1 );
10319 if ( i2 == 0 && i3 == 3 ) { i2 = 3; i3 = 0; ok = true; }
10320 int i0 = helper.WrapIndex( i3 + 1, nbNodes );
10321 int i1 = helper.WrapIndex( i0 + 1, nbNodes );
10323 const SMDS_MeshElement* vol =
10324 helper.AddVolume( nnVec[i3]->back(), (*nnVec[i0])[iZ], (*nnVec[i0])[iZ-1],
10325 nnVec[i2]->back(), (*nnVec[i1])[iZ], (*nnVec[i1])[iZ-1]);
10327 degenVols.push_back( vol );
10331 default: // degen HEX
10333 const SMDS_MeshElement* vol =
10334 helper.AddVolume( nnVec[0]->size() > iZ-1 ? (*nnVec[0])[iZ-1] : nnVec[0]->back(),
10335 nnVec[1]->size() > iZ-1 ? (*nnVec[1])[iZ-1] : nnVec[1]->back(),
10336 nnVec[2]->size() > iZ-1 ? (*nnVec[2])[iZ-1] : nnVec[2]->back(),
10337 nnVec[3]->size() > iZ-1 ? (*nnVec[3])[iZ-1] : nnVec[3]->back(),
10338 nnVec[0]->size() > iZ ? (*nnVec[0])[iZ] : nnVec[0]->back(),
10339 nnVec[1]->size() > iZ ? (*nnVec[1])[iZ] : nnVec[1]->back(),
10340 nnVec[2]->size() > iZ ? (*nnVec[2])[iZ] : nnVec[2]->back(),
10341 nnVec[3]->size() > iZ ? (*nnVec[3])[iZ] : nnVec[3]->back());
10342 degenVols.push_back( vol );
10349 return error("Not supported type of element", data._index);
10351 } // switch ( nbNodes )
10352 } // while ( fIt->more() )
10355 if ( !degenVols.empty() )
10357 SMESH_ComputeErrorPtr& err = _mesh->GetSubMesh( data._solid )->GetComputeError();
10358 if ( !err || err->IsOK() )
10360 SMESH_BadInputElements* badElems =
10361 new SMESH_BadInputElements( getMeshDS(), COMPERR_WARNING, "Bad quality volumes created" );
10362 badElems->myBadElements.insert( badElems->myBadElements.end(),
10363 degenVols.begin(),degenVols.end() );
10364 err.reset( badElems );
10371 namespace VISCOUS_3D
10374 //--------------------------------------------------------------------------------
10376 * \brief Pair of periodic FACEs
10378 struct PeriodicFaces
10380 typedef StdMeshers_ProjectionUtils::TrsfFinder3D Trsf;
10382 ShrinkFace* _shriFace[2];
10383 TNodeNodeMap _nnMap;
10386 PeriodicFaces( ShrinkFace* sf1, ShrinkFace* sf2 ): _shriFace{ sf1, sf2 } {}
10387 bool IncludeShrunk( const TopoDS_Face& face, const TopTools_MapOfShape& shrunkFaces ) const;
10388 bool MoveNodes( const TopoDS_Face& tgtFace );
10391 //--------------------------------------------------------------------------------
10393 * \brief Shrink FACE data used to find periodic FACEs
10397 // ................................................................................
10398 struct BndPart //!< part of FACE boundary, either shrink or no-shrink
10400 bool _isShrink, _isReverse;
10403 std::vector< SMESH_NodeXYZ > _nodes;
10404 TopAbs_ShapeEnum _vertSWOLType[2]; // shrink part includes VERTEXes
10405 AverageHyp* _vertHyp[2];
10408 _isShrink(0), _isReverse(0), _nbSegments(0), _hyp(0),
10409 _vertSWOLType{ TopAbs_WIRE, TopAbs_WIRE }, _vertHyp{ 0, 0 }
10412 bool operator==( const BndPart& other ) const
10414 return ( _isShrink == other._isShrink &&
10415 _nbSegments == other._nbSegments &&
10416 _nodes.size() == other._nodes.size() &&
10417 vertSWOLType1() == other.vertSWOLType1() &&
10418 vertSWOLType2() == other.vertSWOLType2() &&
10420 ( *_hyp == *other._hyp &&
10421 vertHyp1() == other.vertHyp1() &&
10422 vertHyp2() == other.vertHyp2() ))
10425 bool CanAppend( const BndPart& other )
10427 return ( _isShrink == other._isShrink &&
10429 ( *_hyp == *other._hyp &&
10430 *_hyp == vertHyp2() &&
10431 vertHyp2() == other.vertHyp1() ))
10434 void Append( const BndPart& other )
10436 _nbSegments += other._nbSegments;
10437 bool hasCommonNode = ( _nodes.back()->GetID() == other._nodes.front()->GetID() );
10438 _nodes.insert( _nodes.end(), other._nodes.begin() + hasCommonNode, other._nodes.end() );
10439 _vertSWOLType[1] = other._vertSWOLType[1];
10441 _vertHyp[1] = other._vertHyp[1];
10443 const SMDS_MeshNode* Node(size_t i) const
10445 return _nodes[ _isReverse ? ( _nodes.size() - 1 - i ) : i ]._node;
10447 void Reverse() { _isReverse = !_isReverse; }
10448 const TopAbs_ShapeEnum& vertSWOLType1() const { return _vertSWOLType[ _isReverse ]; }
10449 const TopAbs_ShapeEnum& vertSWOLType2() const { return _vertSWOLType[ !_isReverse ]; }
10450 const AverageHyp& vertHyp1() const { return *(_vertHyp[ _isReverse ]); }
10451 const AverageHyp& vertHyp2() const { return *(_vertHyp[ !_isReverse ]); }
10453 // ................................................................................
10455 SMESH_subMesh* _subMesh;
10456 _SolidData* _data1;
10457 _SolidData* _data2;
10458 //bool _isPeriodic;
10460 std::list< BndPart > _boundary;
10461 int _boundarySize, _nbBoundaryParts;
10463 void Init( SMESH_subMesh* sm, _SolidData* sd1, _SolidData* sd2 )
10465 _subMesh = sm; _data1 = sd1; _data2 = sd2; //_isPeriodic = false;
10467 bool IsSame( const TopoDS_Face& face ) const
10469 return _subMesh->GetSubShape().IsSame( face );
10471 bool IsShrunk( const TopTools_MapOfShape& shrunkFaces ) const
10473 return shrunkFaces.Contains( _subMesh->GetSubShape() );
10476 //================================================================================
10478 * Check if meshes on two FACEs are equal
10480 bool IsPeriodic( ShrinkFace& other, PeriodicFaces& periodic )
10482 if ( !IsSameNbElements( other ))
10485 this->SetBoundary();
10486 other.SetBoundary();
10487 if ( this->_boundarySize != other._boundarySize ||
10488 this->_nbBoundaryParts != other._nbBoundaryParts )
10491 for ( int isReverse = 0; isReverse < 2; ++isReverse )
10494 Reverse( _boundary );
10496 // check boundaries
10497 bool equalBoundary = false;
10498 for ( int iP = 0; iP < _nbBoundaryParts && !equalBoundary; ++iP )
10500 if ( ! ( equalBoundary = ( this->_boundary == other._boundary )))
10501 // set first part at end
10502 _boundary.splice( _boundary.end(), _boundary, _boundary.begin() );
10504 if ( !equalBoundary )
10507 // check connectivity
10508 std::set<const SMDS_MeshElement*> elemsThis, elemsOther;
10509 this->GetElements( elemsThis );
10510 other.GetElements( elemsOther );
10511 SMESH_MeshEditor::Sew_Error err =
10512 SMESH_MeshEditor::FindMatchingNodes( elemsThis, elemsOther,
10513 this->_boundary.front().Node(0),
10514 other._boundary.front().Node(0),
10515 this->_boundary.front().Node(1),
10516 other._boundary.front().Node(1),
10518 if ( err != SMESH_MeshEditor::SEW_OK )
10521 // check node positions
10522 std::vector< gp_XYZ > srcPnts, tgtPnts;
10523 this->GetBoundaryPoints( srcPnts );
10524 other.GetBoundaryPoints( tgtPnts );
10525 if ( !periodic._trsf.Solve( srcPnts, tgtPnts )) {
10528 double tol = std::numeric_limits<double>::max();
10529 for ( size_t i = 1; i < srcPnts.size(); ++i ) {
10530 tol = Min( tol, ( srcPnts[i-1] - srcPnts[i] ).SquareModulus() );
10532 tol = 0.01 * Sqrt( tol );
10533 bool nodeCoincide = true;
10534 TNodeNodeMap::iterator n2n = periodic._nnMap.begin();
10535 for ( ; n2n != periodic._nnMap.end() && nodeCoincide; ++n2n )
10537 SMESH_NodeXYZ nSrc = n2n->first;
10538 SMESH_NodeXYZ nTgt = n2n->second;
10539 gp_XYZ pTgt = periodic._trsf.Transform( nSrc );
10540 nodeCoincide = (( pTgt - nTgt ).SquareModulus() < tol );
10542 if ( nodeCoincide )
10548 bool IsSameNbElements( ShrinkFace& other ) // check number of mesh faces
10550 SMESHDS_SubMesh* sm1 = this->_subMesh->GetSubMeshDS();
10551 SMESHDS_SubMesh* sm2 = other._subMesh->GetSubMeshDS();
10552 return ( sm1->NbElements() == sm2->NbElements() &&
10553 sm1->NbNodes() == sm2->NbNodes() );
10556 void Reverse( std::list< BndPart >& boundary )
10558 boundary.reverse();
10559 for ( std::list< BndPart >::iterator part = boundary.begin(); part != boundary.end(); ++part )
10565 if ( !_boundary.empty() )
10568 TopoDS_Face F = TopoDS::Face( _subMesh->GetSubShape() );
10569 if ( F.Orientation() >= TopAbs_INTERNAL ) F.Orientation( TopAbs_FORWARD );
10570 std::list< TopoDS_Edge > edges;
10571 std::list< int > nbEdgesInWire;
10572 /*int nbWires =*/ SMESH_Block::GetOrderedEdges (F, edges, nbEdgesInWire);
10574 // std::list< TopoDS_Edge >::iterator edgesEnd = edges.end();
10575 // if ( nbWires > 1 ) {
10576 // edgesEnd = edges.begin();
10577 // std::advance( edgesEnd, nbEdgesInWire.front() );
10579 StdMeshers_FaceSide fSide( F, edges, _subMesh->GetFather(),
10580 /*fwd=*/true, /*skipMedium=*/true );
10581 _boundarySize = fSide.NbSegments();
10583 //TopoDS_Vertex vv[2];
10584 //std::list< TopoDS_Edge >::iterator edgeIt = edges.begin();
10585 for ( int iE = 0; iE < nbEdgesInWire.front(); ++iE )
10588 _EdgesOnShape* eos = _data1->GetShapeEdges( fSide.EdgeID( iE ));
10590 bndPart._isShrink = ( eos->SWOLType() == TopAbs_FACE );
10591 if ( bndPart._isShrink )
10592 if (( _data1->_noShrinkShapes.count( eos->_shapeID )) ||
10593 ( _data2 && _data2->_noShrinkShapes.count( eos->_shapeID )))
10594 bndPart._isShrink = false;
10596 if ( bndPart._isShrink )
10598 bndPart._hyp = & eos->_hyp;
10599 _EdgesOnShape* eov[2] = { _data1->GetShapeEdges( fSide.FirstVertex( iE )),
10600 _data1->GetShapeEdges( fSide.LastVertex ( iE )) };
10601 for ( int iV = 0; iV < 2; ++iV )
10603 bndPart._vertHyp [iV] = & eov[iV]->_hyp;
10604 bndPart._vertSWOLType[iV] = eov[iV]->SWOLType();
10605 if ( _data1->_noShrinkShapes.count( eov[iV]->_shapeID ))
10606 bndPart._vertSWOLType[iV] = TopAbs_SHAPE;
10607 if ( _data2 && bndPart._vertSWOLType[iV] != TopAbs_SHAPE )
10609 eov[iV] = _data2->GetShapeEdges( iV ? fSide.LastVertex(iE) : fSide.FirstVertex(iE ));
10610 if ( _data2->_noShrinkShapes.count( eov[iV]->_shapeID ))
10611 bndPart._vertSWOLType[iV] = TopAbs_SHAPE;
10612 else if ( eov[iV]->SWOLType() > bndPart._vertSWOLType[iV] )
10613 bndPart._vertSWOLType[iV] = eov[iV]->SWOLType();
10617 std::vector<const SMDS_MeshNode*> nodes = fSide.GetOrderedNodes( iE );
10618 bndPart._nodes.assign( nodes.begin(), nodes.end() );
10619 bndPart._nbSegments = bndPart._nodes.size() - 1;
10621 if ( _boundary.empty() || ! _boundary.back().CanAppend( bndPart ))
10622 _boundary.push_back( bndPart );
10624 _boundary.back().Append( bndPart );
10627 _nbBoundaryParts = _boundary.size();
10628 if ( _nbBoundaryParts > 1 && _boundary.front()._isShrink == _boundary.back()._isShrink )
10630 _boundary.back().Append( _boundary.front() );
10631 _boundary.pop_front();
10632 --_nbBoundaryParts;
10636 void GetElements( std::set<const SMDS_MeshElement*>& theElems)
10638 if ( SMESHDS_SubMesh* sm = _subMesh->GetSubMeshDS() )
10639 for ( SMDS_ElemIteratorPtr fIt = sm->GetElements(); fIt->more(); )
10640 theElems.insert( theElems.end(), fIt->next() );
10645 void GetBoundaryPoints( std::vector< gp_XYZ >& points )
10647 points.reserve( _boundarySize );
10648 size_t nb = _boundary.rbegin()->_nodes.size();
10649 int lastID = _boundary.rbegin()->Node( nb - 1 )->GetID();
10650 std::list< BndPart >::const_iterator part = _boundary.begin();
10651 for ( ; part != _boundary.end(); ++part )
10653 size_t nb = part->_nodes.size();
10655 size_t iR = nb - 1;
10656 size_t* i = part->_isReverse ? &iR : &iF;
10657 if ( part->_nodes[ *i ]->GetID() == lastID )
10659 for ( ; iF < nb; ++iF, --iR )
10660 points.push_back( part->_nodes[ *i ]);
10662 lastID = part->_nodes[ *i ]->GetID();
10665 }; // struct ShrinkFace
10667 //--------------------------------------------------------------------------------
10669 * \brief Periodic FACEs
10673 std::vector< ShrinkFace > _shrinkFaces;
10674 std::vector< PeriodicFaces > _periodicFaces;
10676 PeriodicFaces* GetPeriodic( const TopoDS_Face& face, const TopTools_MapOfShape& shrunkFaces )
10678 for ( size_t i = 0; i < _periodicFaces.size(); ++i )
10679 if ( _periodicFaces[ i ].IncludeShrunk( face, shrunkFaces ))
10680 return & _periodicFaces[ i ];
10685 //================================================================================
10687 * Check if a pair includes the given FACE and the other FACE is already shrunk
10689 bool PeriodicFaces::IncludeShrunk( const TopoDS_Face& face,
10690 const TopTools_MapOfShape& shrunkFaces ) const
10692 return (( _shriFace[0]->IsSame( face ) && _shriFace[1]->IsShrunk( shrunkFaces )) ||
10693 ( _shriFace[1]->IsSame( face ) && _shriFace[0]->IsShrunk( shrunkFaces )));
10696 //================================================================================
10698 * Make equal meshes on periodic faces by moving corresponding nodes
10700 bool PeriodicFaces::MoveNodes( const TopoDS_Face& tgtFace )
10702 int iTgt = _shriFace[1]->IsSame( tgtFace );
10703 int iSrc = 1 - iTgt;
10705 _SolidData* dataSrc = _shriFace[iSrc]->_data1;
10706 _SolidData* dataTgt = _shriFace[iTgt]->_data1;
10708 Trsf * trsf = & _trsf, trsfInverse;
10711 trsfInverse = _trsf;
10712 trsfInverse.Invert();
10713 trsf = &trsfInverse;
10715 SMESHDS_Mesh* meshDS = dataSrc->GetHelper().GetMeshDS();
10717 TNode2Edge::iterator n2e;
10718 TNodeNodeMap::iterator n2n = _nnMap.begin();
10719 for ( ; n2n != _nnMap.end(); ++n2n )
10721 const SMDS_MeshNode* const* nn = & n2n->first;
10722 const SMDS_MeshNode* nSrc = nn[ iSrc ];
10723 const SMDS_MeshNode* nTgt = nn[ iTgt ];
10725 if (( nSrc->GetPosition()->GetDim() == 2 ) ||
10726 (( n2e = dataSrc->_n2eMap.find( nSrc )) == dataSrc->_n2eMap.end() ))
10728 SMESH_NodeXYZ pSrc = nSrc;
10729 gp_XYZ pTgt = trsf->Transform( pSrc );
10730 meshDS->MoveNode( nTgt, pTgt.X(), pTgt.Y(), pTgt.Z() );
10734 _LayerEdge* leSrc = n2e->second;
10735 n2e = dataTgt->_n2eMap.find( nTgt );
10736 if ( n2e == dataTgt->_n2eMap.end() )
10738 _LayerEdge* leTgt = n2e->second;
10739 if ( leSrc->_nodes.size() != leTgt->_nodes.size() )
10741 for ( size_t iN = 1; iN < leSrc->_nodes.size(); ++iN )
10743 SMESH_NodeXYZ pSrc = leSrc->_nodes[ iN ];
10744 gp_XYZ pTgt = trsf->Transform( pSrc );
10745 meshDS->MoveNode( leTgt->_nodes[ iN ], pTgt.X(), pTgt.Y(), pTgt.Z() );
10749 bool done = ( n2n == _nnMap.end() );
10750 // cout << "MMMMMMMOOOOOOOOOOVVVVVVVVVVVEEEEEEEE "
10751 // << _shriFace[iSrc]->_subMesh->GetId() << " -> "
10752 // << _shriFace[iTgt]->_subMesh->GetId() << " -- "
10753 // << ( done ? "DONE" : "FAIL") << endl;
10757 } // namespace VISCOUS_3D; Periodicity part
10760 //================================================================================
10762 * \brief Find FACEs to shrink, that are equally meshed before shrink (i.e. periodic)
10763 * and should remain equal after shrink
10765 //================================================================================
10767 void _ViscousBuilder::findPeriodicFaces()
10769 // make map of (ids of FACEs to shrink mesh on) to (list of _SolidData containing
10770 // _LayerEdge's inflated along FACE or EDGE)
10771 std::map< TGeomID, std::list< _SolidData* > > id2sdMap;
10772 for ( size_t i = 0 ; i < _sdVec.size(); ++i )
10774 _SolidData& data = _sdVec[i];
10775 std::map< TGeomID, TopoDS_Shape >::iterator s2s = data._shrinkShape2Shape.begin();
10776 for (; s2s != data._shrinkShape2Shape.end(); ++s2s )
10777 if ( s2s->second.ShapeType() == TopAbs_FACE )
10778 id2sdMap[ getMeshDS()->ShapeToIndex( s2s->second )].push_back( &data );
10781 _periodicity.reset( new Periodicity );
10782 _periodicity->_shrinkFaces.resize( id2sdMap.size() );
10784 std::map< TGeomID, std::list< _SolidData* > >::iterator id2sdIt = id2sdMap.begin();
10785 for ( size_t i = 0; i < id2sdMap.size(); ++i, ++id2sdIt )
10787 _SolidData* sd1 = id2sdIt->second.front();
10788 _SolidData* sd2 = id2sdIt->second.back();
10789 _periodicity->_shrinkFaces[ i ].Init( _mesh->GetSubMeshContaining( id2sdIt->first ), sd1, sd2 );
10792 for ( size_t i1 = 0; i1 < _periodicity->_shrinkFaces.size(); ++i1 )
10793 for ( size_t i2 = i1 + 1; i2 < _periodicity->_shrinkFaces.size(); ++i2 )
10795 PeriodicFaces pf( & _periodicity->_shrinkFaces[ i1 ],
10796 & _periodicity->_shrinkFaces[ i2 ]);
10797 if ( pf._shriFace[0]->IsPeriodic( *pf._shriFace[1], pf ))
10799 _periodicity->_periodicFaces.push_back( pf );
10805 //================================================================================
10807 * \brief Shrink 2D mesh on faces to let space for inflated layers
10809 //================================================================================
10811 bool _ViscousBuilder::shrink(_SolidData& theData)
10813 // make map of (ids of FACEs to shrink mesh on) to (list of _SolidData containing
10814 // _LayerEdge's inflated along FACE or EDGE)
10815 map< TGeomID, list< _SolidData* > > f2sdMap;
10816 for ( size_t i = 0 ; i < _sdVec.size(); ++i )
10818 _SolidData& data = _sdVec[i];
10819 map< TGeomID, TopoDS_Shape >::iterator s2s = data._shrinkShape2Shape.begin();
10820 for (; s2s != data._shrinkShape2Shape.end(); ++s2s )
10821 if ( s2s->second.ShapeType() == TopAbs_FACE && !_shrunkFaces.Contains( s2s->second ))
10823 f2sdMap[ getMeshDS()->ShapeToIndex( s2s->second )].push_back( &data );
10825 // Put mesh faces on the shrunk FACE to the proxy sub-mesh to avoid
10826 // usage of mesh faces made in addBoundaryElements() by the 3D algo or
10827 // by StdMeshers_QuadToTriaAdaptor
10828 if ( SMESHDS_SubMesh* smDS = getMeshDS()->MeshElements( s2s->second ))
10830 SMESH_ProxyMesh::SubMesh* proxySub =
10831 data._proxyMesh->getFaceSubM( TopoDS::Face( s2s->second ), /*create=*/true);
10832 if ( proxySub->NbElements() == 0 )
10834 SMDS_ElemIteratorPtr fIt = smDS->GetElements();
10835 while ( fIt->more() )
10837 const SMDS_MeshElement* f = fIt->next();
10838 // as a result 3D algo will use elements from proxySub and not from smDS
10839 proxySub->AddElement( f );
10840 f->setIsMarked( true );
10842 // Mark nodes on the FACE to discriminate them from nodes
10843 // added by addBoundaryElements(); marked nodes are to be smoothed while shrink()
10844 for ( int iN = 0, nbN = f->NbNodes(); iN < nbN; ++iN )
10846 const SMDS_MeshNode* n = f->GetNode( iN );
10847 if ( n->GetPosition()->GetDim() == 2 )
10848 n->setIsMarked( true );
10856 SMESH_MesherHelper helper( *_mesh );
10857 helper.ToFixNodeParameters( true );
10860 map< TGeomID, _Shrinker1D > e2shrMap;
10861 vector< _EdgesOnShape* > subEOS;
10862 vector< _LayerEdge* > lEdges;
10864 // loop on FACEs to shrink mesh on
10865 map< TGeomID, list< _SolidData* > >::iterator f2sd = f2sdMap.begin();
10866 for ( ; f2sd != f2sdMap.end(); ++f2sd )
10868 list< _SolidData* > & dataList = f2sd->second;
10869 if ( dataList.front()->_n2eMap.empty() ||
10870 dataList.back() ->_n2eMap.empty() )
10871 continue; // not yet computed
10872 if ( dataList.front() != &theData &&
10873 dataList.back() != &theData )
10876 _SolidData& data = *dataList.front();
10877 _SolidData* data2 = dataList.size() > 1 ? dataList.back() : 0;
10878 const TopoDS_Face& F = TopoDS::Face( getMeshDS()->IndexToShape( f2sd->first ));
10879 SMESH_subMesh* sm = _mesh->GetSubMesh( F );
10880 SMESHDS_SubMesh* smDS = sm->GetSubMeshDS();
10882 Handle(Geom_Surface) surface = BRep_Tool::Surface( F );
10884 _shrunkFaces.Add( F );
10885 helper.SetSubShape( F );
10887 // ==============================
10888 // Use periodicity to move nodes
10889 // ==============================
10891 PeriodicFaces* periodic = _periodicity->GetPeriodic( F, _shrunkFaces );
10892 bool movedByPeriod = ( periodic && periodic->MoveNodes( F ));
10894 // ===========================
10895 // Prepare data for shrinking
10896 // ===========================
10898 // Collect nodes to smooth (they are marked at the beginning of this method)
10899 vector < const SMDS_MeshNode* > smoothNodes;
10901 if ( !movedByPeriod )
10903 SMDS_NodeIteratorPtr nIt = smDS->GetNodes();
10904 while ( nIt->more() )
10906 const SMDS_MeshNode* n = nIt->next();
10907 if ( n->isMarked() )
10908 smoothNodes.push_back( n );
10911 // Find out face orientation
10912 double refSign = 1;
10913 const set<TGeomID> ignoreShapes;
10915 if ( !smoothNodes.empty() )
10917 vector<_Simplex> simplices;
10918 _Simplex::GetSimplices( smoothNodes[0], simplices, ignoreShapes );
10919 helper.GetNodeUV( F, simplices[0]._nPrev, 0, &isOkUV ); // fix UV of simplex nodes
10920 helper.GetNodeUV( F, simplices[0]._nNext, 0, &isOkUV );
10921 gp_XY uv = helper.GetNodeUV( F, smoothNodes[0], 0, &isOkUV );
10922 if ( !simplices[0].IsForward(uv, smoothNodes[0], F, helper, refSign ))
10926 // Find _LayerEdge's inflated along F
10930 SMESH_subMeshIteratorPtr subIt = sm->getDependsOnIterator(/*includeSelf=*/false,
10931 /*complexFirst=*/true); //!!!
10932 while ( subIt->more() )
10934 const TGeomID subID = subIt->next()->GetId();
10935 if ( data._noShrinkShapes.count( subID ))
10937 _EdgesOnShape* eos = data.GetShapeEdges( subID );
10938 if ( !eos || eos->_sWOL.IsNull() )
10939 if ( data2 ) // check in adjacent SOLID
10941 eos = data2->GetShapeEdges( subID );
10942 if ( !eos || eos->_sWOL.IsNull() )
10945 subEOS.push_back( eos );
10947 if ( !movedByPeriod )
10948 for ( size_t i = 0; i < eos->_edges.size(); ++i )
10950 lEdges.push_back( eos->_edges[ i ] );
10951 prepareEdgeToShrink( *eos->_edges[ i ], *eos, helper, smDS );
10956 dumpFunction(SMESH_Comment("beforeShrinkFace")<<f2sd->first); // debug
10957 SMDS_ElemIteratorPtr fIt = smDS->GetElements();
10958 while ( fIt->more() )
10959 if ( const SMDS_MeshElement* f = fIt->next() )
10960 dumpChangeNodes( f );
10963 // Replace source nodes by target nodes in mesh faces to shrink
10964 dumpFunction(SMESH_Comment("replNodesOnFace")<<f2sd->first); // debug
10965 const SMDS_MeshNode* nodes[20];
10966 for ( size_t iS = 0; iS < subEOS.size(); ++iS )
10968 _EdgesOnShape& eos = * subEOS[ iS ];
10969 for ( size_t i = 0; i < eos._edges.size(); ++i )
10971 _LayerEdge& edge = *eos._edges[i];
10972 const SMDS_MeshNode* srcNode = edge._nodes[0];
10973 const SMDS_MeshNode* tgtNode = edge._nodes.back();
10974 SMDS_ElemIteratorPtr fIt = srcNode->GetInverseElementIterator(SMDSAbs_Face);
10975 while ( fIt->more() )
10977 const SMDS_MeshElement* f = fIt->next();
10978 if ( !smDS->Contains( f ) || !f->isMarked() )
10980 SMDS_NodeIteratorPtr nIt = f->nodeIterator();
10981 for ( int iN = 0; nIt->more(); ++iN )
10983 const SMDS_MeshNode* n = nIt->next();
10984 nodes[iN] = ( n == srcNode ? tgtNode : n );
10986 helper.GetMeshDS()->ChangeElementNodes( f, nodes, f->NbNodes() );
10987 dumpChangeNodes( f );
10993 // find out if a FACE is concave
10994 const bool isConcaveFace = isConcave( F, helper );
10996 // Create _SmoothNode's on face F
10997 vector< _SmoothNode > nodesToSmooth( smoothNodes.size() );
10999 dumpFunction(SMESH_Comment("fixUVOnFace")<<f2sd->first); // debug
11000 const bool sortSimplices = isConcaveFace;
11001 for ( size_t i = 0; i < smoothNodes.size(); ++i )
11003 const SMDS_MeshNode* n = smoothNodes[i];
11004 nodesToSmooth[ i ]._node = n;
11005 // src nodes must be already replaced by tgt nodes to have tgt nodes in _simplices
11006 _Simplex::GetSimplices( n, nodesToSmooth[ i ]._simplices, ignoreShapes, 0, sortSimplices);
11007 // fix up incorrect uv of nodes on the FACE
11008 helper.GetNodeUV( F, n, 0, &isOkUV);
11013 //if ( nodesToSmooth.empty() ) continue;
11015 // Find EDGE's to shrink and set simpices to LayerEdge's
11016 set< _Shrinker1D* > eShri1D;
11018 for ( size_t iS = 0; iS < subEOS.size(); ++iS )
11020 _EdgesOnShape& eos = * subEOS[ iS ];
11021 if ( eos.SWOLType() == TopAbs_EDGE )
11023 SMESH_subMesh* edgeSM = _mesh->GetSubMesh( eos._sWOL );
11024 VISCOUS_3D::ToClearSubWithMain( edgeSM, data._solid );
11025 if ( !movedByPeriod )
11027 _Shrinker1D& shrinker = e2shrMap[ edgeSM->GetId() ];
11028 eShri1D.insert( & shrinker );
11029 shrinker.AddEdge( eos._edges[0], eos, helper );
11030 // restore params of nodes on EDGE if the EDGE has been already
11031 // shrunk while shrinking other FACE
11032 shrinker.RestoreParams();
11035 for ( size_t i = 0; i < eos._edges.size(); ++i )
11037 _LayerEdge& edge = * eos._edges[i];
11038 _Simplex::GetSimplices( /*tgtNode=*/edge._nodes.back(), edge._simplices, ignoreShapes );
11040 // additionally mark tgt node; only marked nodes will be used in SetNewLength2d()
11041 // not-marked nodes are those added by refine()
11042 edge._nodes.back()->setIsMarked( true );
11047 bool toFixTria = false; // to improve quality of trias by diagonal swap
11048 if ( isConcaveFace && !movedByPeriod )
11050 const bool hasTria = _mesh->NbTriangles(), hasQuad = _mesh->NbQuadrangles();
11051 if ( hasTria != hasQuad ) {
11052 toFixTria = hasTria;
11055 set<int> nbNodesSet;
11056 SMDS_ElemIteratorPtr fIt = smDS->GetElements();
11057 while ( fIt->more() && nbNodesSet.size() < 2 )
11058 nbNodesSet.insert( fIt->next()->NbCornerNodes() );
11059 toFixTria = ( *nbNodesSet.begin() == 3 );
11063 // ==================
11064 // Perform shrinking
11065 // ==================
11067 bool shrunk = !movedByPeriod;
11068 int nbBad, shriStep=0, smooStep=0;
11069 _SmoothNode::SmoothType smoothType
11070 = isConcaveFace ? _SmoothNode::ANGULAR : _SmoothNode::LAPLACIAN;
11071 SMESH_Comment errMsg;
11075 // Move boundary nodes (actually just set new UV)
11076 // -----------------------------------------------
11077 dumpFunction(SMESH_Comment("moveBoundaryOnF")<<f2sd->first<<"_st"<<shriStep ); // debug
11079 for ( size_t iS = 0; iS < subEOS.size(); ++iS )
11081 _EdgesOnShape& eos = * subEOS[ iS ];
11082 for ( size_t i = 0; i < eos._edges.size(); ++i )
11084 shrunk |= eos._edges[i]->SetNewLength2d( surface, F, eos, helper );
11089 // Move nodes on EDGE's
11090 // (XYZ is set as soon as a needed length reached in SetNewLength2d())
11091 set< _Shrinker1D* >::iterator shr = eShri1D.begin();
11092 for ( ; shr != eShri1D.end(); ++shr )
11093 (*shr)->Compute( /*set3D=*/false, helper );
11096 // -----------------
11097 int nbNoImpSteps = 0;
11100 while (( nbNoImpSteps < 5 && nbBad > 0) && moved)
11102 dumpFunction(SMESH_Comment("shrinkFace")<<f2sd->first<<"_st"<<++smooStep); // debug
11104 int oldBadNb = nbBad;
11107 // '% 5' minimizes NB FUNCTIONS on viscous_layers_00/B2 case
11108 _SmoothNode::SmoothType smooTy = ( smooStep % 5 ) ? smoothType : _SmoothNode::LAPLACIAN;
11109 for ( size_t i = 0; i < nodesToSmooth.size(); ++i )
11111 moved |= nodesToSmooth[i].Smooth( nbBad, surface, helper, refSign,
11112 smooTy, /*set3D=*/isConcaveFace);
11114 if ( nbBad < oldBadNb )
11124 errMsg << "Can't shrink 2D mesh on face " << f2sd->first;
11125 if ( shriStep > 200 )
11126 errMsg << "Infinite loop at shrinking 2D mesh on face " << f2sd->first;
11127 if ( !errMsg.empty() )
11130 // Fix narrow triangles by swapping diagonals
11131 // ---------------------------------------
11134 set<const SMDS_MeshNode*> usedNodes;
11135 fixBadFaces( F, helper, /*is2D=*/true, shriStep, & usedNodes); // swap diagonals
11137 // update working data
11138 set<const SMDS_MeshNode*>::iterator n;
11139 for ( size_t i = 0; i < nodesToSmooth.size() && !usedNodes.empty(); ++i )
11141 n = usedNodes.find( nodesToSmooth[ i ]._node );
11142 if ( n != usedNodes.end())
11144 _Simplex::GetSimplices( nodesToSmooth[ i ]._node,
11145 nodesToSmooth[ i ]._simplices,
11146 ignoreShapes, NULL,
11147 /*sortSimplices=*/ smoothType == _SmoothNode::ANGULAR );
11148 usedNodes.erase( n );
11151 for ( size_t i = 0; i < lEdges.size() && !usedNodes.empty(); ++i )
11153 n = usedNodes.find( /*tgtNode=*/ lEdges[i]->_nodes.back() );
11154 if ( n != usedNodes.end())
11156 _Simplex::GetSimplices( lEdges[i]->_nodes.back(),
11157 lEdges[i]->_simplices,
11159 usedNodes.erase( n );
11163 // TODO: check effect of this additional smooth
11164 // additional laplacian smooth to increase allowed shrink step
11165 // for ( int st = 1; st; --st )
11167 // dumpFunction(SMESH_Comment("shrinkFace")<<f2sd->first<<"_st"<<++smooStep); // debug
11168 // for ( size_t i = 0; i < nodesToSmooth.size(); ++i )
11170 // nodesToSmooth[i].Smooth( nbBad,surface,helper,refSign,
11171 // _SmoothNode::LAPLACIAN,/*set3D=*/false);
11175 } // while ( shrunk )
11177 if ( !errMsg.empty() ) // Try to re-compute the shrink FACE
11179 debugMsg( "Re-compute FACE " << f2sd->first << " because " << errMsg );
11182 SMESHDS_SubMesh* psm = data._proxyMesh->getFaceSubM( F );
11184 vector< const SMDS_MeshElement* > facesToRm;
11187 facesToRm.reserve( psm->NbElements() );
11188 for ( SMDS_ElemIteratorPtr ite = psm->GetElements(); ite->more(); )
11189 facesToRm.push_back( ite->next() );
11191 for ( size_t i = 0 ; i < _sdVec.size(); ++i )
11192 if (( psm = _sdVec[i]._proxyMesh->getFaceSubM( F )))
11195 for ( size_t i = 0; i < facesToRm.size(); ++i )
11196 getMeshDS()->RemoveFreeElement( facesToRm[i], smDS, /*fromGroups=*/false );
11200 TIDSortedNodeSet nodesToKeep; // nodes of _LayerEdge to keep
11201 for ( size_t iS = 0; iS < subEOS.size(); ++iS ) {
11202 for ( size_t i = 0; i < subEOS[iS]->_edges.size(); ++i )
11203 nodesToKeep.insert( ++( subEOS[iS]->_edges[i]->_nodes.begin() ),
11204 subEOS[iS]->_edges[i]->_nodes.end() );
11206 SMDS_NodeIteratorPtr itn = smDS->GetNodes();
11207 while ( itn->more() ) {
11208 const SMDS_MeshNode* n = itn->next();
11209 if ( !nodesToKeep.count( n ))
11210 getMeshDS()->RemoveFreeNode( n, smDS, /*fromGroups=*/false );
11213 // restore position and UV of target nodes
11215 for ( size_t iS = 0; iS < subEOS.size(); ++iS )
11216 for ( size_t i = 0; i < subEOS[iS]->_edges.size(); ++i )
11218 _LayerEdge* edge = subEOS[iS]->_edges[i];
11219 SMDS_MeshNode* tgtNode = const_cast< SMDS_MeshNode*& >( edge->_nodes.back() );
11220 if ( edge->_pos.empty() ||
11221 edge->Is( _LayerEdge::SHRUNK )) continue;
11222 if ( subEOS[iS]->SWOLType() == TopAbs_FACE )
11224 SMDS_FacePositionPtr pos = tgtNode->GetPosition();
11225 pos->SetUParameter( edge->_pos[0].X() );
11226 pos->SetVParameter( edge->_pos[0].Y() );
11227 p = surface->Value( edge->_pos[0].X(), edge->_pos[0].Y() );
11231 SMDS_EdgePositionPtr pos = tgtNode->GetPosition();
11232 pos->SetUParameter( edge->_pos[0].Coord( U_TGT ));
11233 p = BRepAdaptor_Curve( TopoDS::Edge( subEOS[iS]->_sWOL )).Value( pos->GetUParameter() );
11235 tgtNode->setXYZ( p.X(), p.Y(), p.Z() );
11236 dumpMove( tgtNode );
11238 // shrink EDGE sub-meshes and set proxy sub-meshes
11239 UVPtStructVec uvPtVec;
11240 set< _Shrinker1D* >::iterator shrIt = eShri1D.begin();
11241 for ( shrIt = eShri1D.begin(); shrIt != eShri1D.end(); ++shrIt )
11243 _Shrinker1D* shr = (*shrIt);
11244 shr->Compute( /*set3D=*/true, helper );
11246 // set proxy mesh of EDGEs w/o layers
11247 map< double, const SMDS_MeshNode* > nodes;
11248 SMESH_Algo::GetSortedNodesOnEdge( getMeshDS(), shr->GeomEdge(),/*skipMedium=*/true, nodes);
11249 // remove refinement nodes
11250 const SMDS_MeshNode* sn0 = shr->SrcNode(0), *sn1 = shr->SrcNode(1);
11251 const SMDS_MeshNode* tn0 = shr->TgtNode(0), *tn1 = shr->TgtNode(1);
11252 map< double, const SMDS_MeshNode* >::iterator u2n = nodes.begin();
11253 if ( u2n->second == sn0 || u2n->second == sn1 )
11255 while ( u2n->second != tn0 && u2n->second != tn1 )
11257 nodes.erase( nodes.begin(), u2n );
11259 u2n = --nodes.end();
11260 if ( u2n->second == sn0 || u2n->second == sn1 )
11262 while ( u2n->second != tn0 && u2n->second != tn1 )
11264 nodes.erase( ++u2n, nodes.end() );
11266 // set proxy sub-mesh
11267 uvPtVec.resize( nodes.size() );
11268 u2n = nodes.begin();
11269 BRepAdaptor_Curve2d curve( shr->GeomEdge(), F );
11270 for ( size_t i = 0; i < nodes.size(); ++i, ++u2n )
11272 uvPtVec[ i ].node = u2n->second;
11273 uvPtVec[ i ].param = u2n->first;
11274 uvPtVec[ i ].SetUV( curve.Value( u2n->first ).XY() );
11276 StdMeshers_FaceSide fSide( uvPtVec, F, shr->GeomEdge(), _mesh );
11277 StdMeshers_ViscousLayers2D::SetProxyMeshOfEdge( fSide );
11280 // set proxy mesh of EDGEs with layers
11281 vector< _LayerEdge* > edges;
11282 for ( size_t iS = 0; iS < subEOS.size(); ++iS )
11284 _EdgesOnShape& eos = * subEOS[ iS ];
11285 if ( eos.ShapeType() != TopAbs_EDGE ) continue;
11287 const TopoDS_Edge& E = TopoDS::Edge( eos._shape );
11288 data.SortOnEdge( E, eos._edges );
11291 if ( _EdgesOnShape* eov = data.GetShapeEdges( helper.IthVertex( 0, E, /*CumOri=*/false )))
11292 if ( !eov->_edges.empty() )
11293 edges.push_back( eov->_edges[0] ); // on 1st VERTEX
11295 edges.insert( edges.end(), eos._edges.begin(), eos._edges.end() );
11297 if ( _EdgesOnShape* eov = data.GetShapeEdges( helper.IthVertex( 1, E, /*CumOri=*/false )))
11298 if ( !eov->_edges.empty() )
11299 edges.push_back( eov->_edges[0] ); // on last VERTEX
11301 uvPtVec.resize( edges.size() );
11302 for ( size_t i = 0; i < edges.size(); ++i )
11304 uvPtVec[ i ].node = edges[i]->_nodes.back();
11305 uvPtVec[ i ].param = helper.GetNodeU( E, edges[i]->_nodes[0] );
11306 uvPtVec[ i ].SetUV( helper.GetNodeUV( F, edges[i]->_nodes.back() ));
11308 BRep_Tool::Range( E, uvPtVec[0].param, uvPtVec.back().param );
11309 StdMeshers_FaceSide fSide( uvPtVec, F, E, _mesh );
11310 StdMeshers_ViscousLayers2D::SetProxyMeshOfEdge( fSide );
11312 // temporary clear the FACE sub-mesh from faces made by refine()
11313 vector< const SMDS_MeshElement* > elems;
11314 elems.reserve( smDS->NbElements() + smDS->NbNodes() );
11315 for ( SMDS_ElemIteratorPtr ite = smDS->GetElements(); ite->more(); )
11316 elems.push_back( ite->next() );
11317 for ( SMDS_NodeIteratorPtr ite = smDS->GetNodes(); ite->more(); )
11318 elems.push_back( ite->next() );
11321 // compute the mesh on the FACE
11322 sm->ComputeStateEngine( SMESH_subMesh::CHECK_COMPUTE_STATE );
11323 sm->ComputeStateEngine( SMESH_subMesh::COMPUTE_SUBMESH );
11325 // re-fill proxy sub-meshes of the FACE
11326 for ( size_t i = 0 ; i < _sdVec.size(); ++i )
11327 if (( psm = _sdVec[i]._proxyMesh->getFaceSubM( F )))
11328 for ( SMDS_ElemIteratorPtr ite = smDS->GetElements(); ite->more(); )
11329 psm->AddElement( ite->next() );
11332 for ( size_t i = 0; i < elems.size(); ++i )
11333 smDS->AddElement( elems[i] );
11335 if ( sm->GetComputeState() != SMESH_subMesh::COMPUTE_OK )
11336 return error( errMsg );
11338 } // end of re-meshing in case of failed smoothing
11339 else if ( !movedByPeriod )
11341 // No wrongly shaped faces remain; final smooth. Set node XYZ.
11342 bool isStructuredFixed = false;
11343 if ( SMESH_2D_Algo* algo = dynamic_cast<SMESH_2D_Algo*>( sm->GetAlgo() ))
11344 isStructuredFixed = algo->FixInternalNodes( *data._proxyMesh, F );
11345 if ( !isStructuredFixed )
11347 if ( isConcaveFace ) // fix narrow faces by swapping diagonals
11348 fixBadFaces( F, helper, /*is2D=*/false, ++shriStep );
11350 for ( int st = 3; st; --st )
11353 case 1: smoothType = _SmoothNode::LAPLACIAN; break;
11354 case 2: smoothType = _SmoothNode::LAPLACIAN; break;
11355 case 3: smoothType = _SmoothNode::ANGULAR; break;
11357 dumpFunction(SMESH_Comment("shrinkFace")<<f2sd->first<<"_st"<<++smooStep); // debug
11358 for ( size_t i = 0; i < nodesToSmooth.size(); ++i )
11360 nodesToSmooth[i].Smooth( nbBad,surface,helper,refSign,
11361 smoothType,/*set3D=*/st==1 );
11366 if ( !getMeshDS()->IsEmbeddedMode() )
11367 // Log node movement
11368 for ( size_t i = 0; i < nodesToSmooth.size(); ++i )
11370 SMESH_TNodeXYZ p ( nodesToSmooth[i]._node );
11371 getMeshDS()->MoveNode( nodesToSmooth[i]._node, p.X(), p.Y(), p.Z() );
11375 // Set an event listener to clear FACE sub-mesh together with SOLID sub-mesh
11376 VISCOUS_3D::ToClearSubWithMain( sm, data._solid );
11378 VISCOUS_3D::ToClearSubWithMain( sm, data2->_solid );
11380 } // loop on FACES to shrink mesh on
11383 // Replace source nodes by target nodes in shrunk mesh edges
11385 map< int, _Shrinker1D >::iterator e2shr = e2shrMap.begin();
11386 for ( ; e2shr != e2shrMap.end(); ++e2shr )
11387 e2shr->second.SwapSrcTgtNodes( getMeshDS() );
11392 //================================================================================
11394 * \brief Computes 2d shrink direction and finds nodes limiting shrinking
11396 //================================================================================
11398 bool _ViscousBuilder::prepareEdgeToShrink( _LayerEdge& edge,
11399 _EdgesOnShape& eos,
11400 SMESH_MesherHelper& helper,
11401 const SMESHDS_SubMesh* faceSubMesh)
11403 const SMDS_MeshNode* srcNode = edge._nodes[0];
11404 const SMDS_MeshNode* tgtNode = edge._nodes.back();
11406 if ( eos.SWOLType() == TopAbs_FACE )
11408 if ( tgtNode->GetPosition()->GetDim() != 2 ) // not inflated edge
11411 edge.Set( _LayerEdge::SHRUNK );
11412 return srcNode == tgtNode;
11414 gp_XY srcUV ( edge._pos[0].X(), edge._pos[0].Y() ); //helper.GetNodeUV( F, srcNode );
11415 gp_XY tgtUV = edge.LastUV( TopoDS::Face( eos._sWOL ), eos ); //helper.GetNodeUV( F, tgtNode );
11416 gp_Vec2d uvDir( srcUV, tgtUV );
11417 double uvLen = uvDir.Magnitude();
11419 edge._normal.SetCoord( uvDir.X(),uvDir.Y(), 0 );
11422 //edge._pos.resize(1);
11423 edge._pos[0].SetCoord( tgtUV.X(), tgtUV.Y(), 0 );
11425 // set UV of source node to target node
11426 SMDS_FacePositionPtr pos = tgtNode->GetPosition();
11427 pos->SetUParameter( srcUV.X() );
11428 pos->SetVParameter( srcUV.Y() );
11430 else // _sWOL is TopAbs_EDGE
11432 if ( tgtNode->GetPosition()->GetDim() != 1 ) // not inflated edge
11435 edge.Set( _LayerEdge::SHRUNK );
11436 return srcNode == tgtNode;
11438 const TopoDS_Edge& E = TopoDS::Edge( eos._sWOL );
11439 SMESHDS_SubMesh* edgeSM = getMeshDS()->MeshElements( E );
11440 if ( !edgeSM || edgeSM->NbElements() == 0 )
11441 return error(SMESH_Comment("Not meshed EDGE ") << getMeshDS()->ShapeToIndex( E ));
11443 const SMDS_MeshNode* n2 = 0;
11444 SMDS_ElemIteratorPtr eIt = srcNode->GetInverseElementIterator(SMDSAbs_Edge);
11445 while ( eIt->more() && !n2 )
11447 const SMDS_MeshElement* e = eIt->next();
11448 if ( !edgeSM->Contains(e)) continue;
11449 n2 = e->GetNode( 0 );
11450 if ( n2 == srcNode ) n2 = e->GetNode( 1 );
11453 return error(SMESH_Comment("Wrongly meshed EDGE ") << getMeshDS()->ShapeToIndex( E ));
11455 double uSrc = helper.GetNodeU( E, srcNode, n2 );
11456 double uTgt = helper.GetNodeU( E, tgtNode, srcNode );
11457 double u2 = helper.GetNodeU( E, n2, srcNode );
11459 //edge._pos.clear();
11461 if ( fabs( uSrc-uTgt ) < 0.99 * fabs( uSrc-u2 ))
11463 // tgtNode is located so that it does not make faces with wrong orientation
11464 edge.Set( _LayerEdge::SHRUNK );
11467 //edge._pos.resize(1);
11468 edge._pos[0].SetCoord( U_TGT, uTgt );
11469 edge._pos[0].SetCoord( U_SRC, uSrc );
11470 edge._pos[0].SetCoord( LEN_TGT, fabs( uSrc-uTgt ));
11472 edge._simplices.resize( 1 );
11473 edge._simplices[0]._nPrev = n2;
11475 // set U of source node to the target node
11476 SMDS_EdgePositionPtr pos = tgtNode->GetPosition();
11477 pos->SetUParameter( uSrc );
11482 //================================================================================
11484 * \brief Restore position of a sole node of a _LayerEdge based on _noShrinkShapes
11486 //================================================================================
11488 void _ViscousBuilder::restoreNoShrink( _LayerEdge& edge ) const
11490 if ( edge._nodes.size() == 1 )
11495 const SMDS_MeshNode* srcNode = edge._nodes[0];
11496 TopoDS_Shape S = SMESH_MesherHelper::GetSubShapeByNode( srcNode, getMeshDS() );
11497 if ( S.IsNull() ) return;
11501 switch ( S.ShapeType() )
11506 TopLoc_Location loc;
11507 Handle(Geom_Curve) curve = BRep_Tool::Curve( TopoDS::Edge( S ), loc, f, l );
11508 if ( curve.IsNull() ) return;
11509 SMDS_EdgePositionPtr ePos = srcNode->GetPosition();
11510 p = curve->Value( ePos->GetUParameter() );
11513 case TopAbs_VERTEX:
11515 p = BRep_Tool::Pnt( TopoDS::Vertex( S ));
11520 getMeshDS()->MoveNode( srcNode, p.X(), p.Y(), p.Z() );
11521 dumpMove( srcNode );
11525 //================================================================================
11527 * \brief Try to fix triangles with high aspect ratio by swapping diagonals
11529 //================================================================================
11531 void _ViscousBuilder::fixBadFaces(const TopoDS_Face& F,
11532 SMESH_MesherHelper& helper,
11535 set<const SMDS_MeshNode*> * involvedNodes)
11537 SMESH::Controls::AspectRatio qualifier;
11538 SMESH::Controls::TSequenceOfXYZ points(3), points1(3), points2(3);
11539 const double maxAspectRatio = is2D ? 4. : 2;
11540 _NodeCoordHelper xyz( F, helper, is2D );
11542 // find bad triangles
11544 vector< const SMDS_MeshElement* > badTrias;
11545 vector< double > badAspects;
11546 SMESHDS_SubMesh* sm = helper.GetMeshDS()->MeshElements( F );
11547 SMDS_ElemIteratorPtr fIt = sm->GetElements();
11548 while ( fIt->more() )
11550 const SMDS_MeshElement * f = fIt->next();
11551 if ( f->NbCornerNodes() != 3 ) continue;
11552 for ( int iP = 0; iP < 3; ++iP ) points(iP+1) = xyz( f->GetNode(iP));
11553 double aspect = qualifier.GetValue( points );
11554 if ( aspect > maxAspectRatio )
11556 badTrias.push_back( f );
11557 badAspects.push_back( aspect );
11562 dumpFunction(SMESH_Comment("beforeSwapDiagonals_F")<<helper.GetSubShapeID());
11563 SMDS_ElemIteratorPtr fIt = sm->GetElements();
11564 while ( fIt->more() )
11566 const SMDS_MeshElement * f = fIt->next();
11567 if ( f->NbCornerNodes() == 3 )
11568 dumpChangeNodes( f );
11572 if ( badTrias.empty() )
11575 // find couples of faces to swap diagonal
11577 typedef pair < const SMDS_MeshElement* , const SMDS_MeshElement* > T2Trias;
11578 vector< T2Trias > triaCouples;
11580 TIDSortedElemSet involvedFaces, emptySet;
11581 for ( size_t iTia = 0; iTia < badTrias.size(); ++iTia )
11584 double aspRatio [3];
11587 if ( !involvedFaces.insert( badTrias[iTia] ).second )
11589 for ( int iP = 0; iP < 3; ++iP )
11590 points(iP+1) = xyz( badTrias[iTia]->GetNode(iP));
11592 // find triangles adjacent to badTrias[iTia] with better aspect ratio after diag-swaping
11593 int bestCouple = -1;
11594 for ( int iSide = 0; iSide < 3; ++iSide )
11596 const SMDS_MeshNode* n1 = badTrias[iTia]->GetNode( iSide );
11597 const SMDS_MeshNode* n2 = badTrias[iTia]->GetNode(( iSide+1 ) % 3 );
11598 trias [iSide].first = badTrias[iTia];
11599 trias [iSide].second = SMESH_MeshAlgos::FindFaceInSet( n1, n2, emptySet, involvedFaces,
11601 if (( ! trias[iSide].second ) ||
11602 ( trias[iSide].second->NbCornerNodes() != 3 ) ||
11603 ( ! sm->Contains( trias[iSide].second )))
11606 // aspect ratio of an adjacent tria
11607 for ( int iP = 0; iP < 3; ++iP )
11608 points2(iP+1) = xyz( trias[iSide].second->GetNode(iP));
11609 double aspectInit = qualifier.GetValue( points2 );
11611 // arrange nodes as after diag-swaping
11612 if ( helper.WrapIndex( i1+1, 3 ) == i2 )
11613 i3 = helper.WrapIndex( i1-1, 3 );
11615 i3 = helper.WrapIndex( i1+1, 3 );
11617 points1( 1+ iSide ) = points2( 1+ i3 );
11618 points2( 1+ i2 ) = points1( 1+ ( iSide+2 ) % 3 );
11620 // aspect ratio after diag-swaping
11621 aspRatio[ iSide ] = qualifier.GetValue( points1 ) + qualifier.GetValue( points2 );
11622 if ( aspRatio[ iSide ] > aspectInit + badAspects[ iTia ] )
11625 // prevent inversion of a triangle
11626 gp_Vec norm1 = gp_Vec( points1(1), points1(3) ) ^ gp_Vec( points1(1), points1(2) );
11627 gp_Vec norm2 = gp_Vec( points2(1), points2(3) ) ^ gp_Vec( points2(1), points2(2) );
11628 if ( norm1 * norm2 < 0. && norm1.Angle( norm2 ) > 70./180.*M_PI )
11631 if ( bestCouple < 0 || aspRatio[ bestCouple ] > aspRatio[ iSide ] )
11632 bestCouple = iSide;
11635 if ( bestCouple >= 0 )
11637 triaCouples.push_back( trias[bestCouple] );
11638 involvedFaces.insert ( trias[bestCouple].second );
11642 involvedFaces.erase( badTrias[iTia] );
11645 if ( triaCouples.empty() )
11650 SMESH_MeshEditor editor( helper.GetMesh() );
11651 dumpFunction(SMESH_Comment("beforeSwapDiagonals_F")<<helper.GetSubShapeID()<<"_"<<step);
11652 for ( size_t i = 0; i < triaCouples.size(); ++i )
11654 dumpChangeNodes( triaCouples[i].first );
11655 dumpChangeNodes( triaCouples[i].second );
11656 editor.InverseDiag( triaCouples[i].first, triaCouples[i].second );
11659 if ( involvedNodes )
11660 for ( size_t i = 0; i < triaCouples.size(); ++i )
11662 involvedNodes->insert( triaCouples[i].first->begin_nodes(),
11663 triaCouples[i].first->end_nodes() );
11664 involvedNodes->insert( triaCouples[i].second->begin_nodes(),
11665 triaCouples[i].second->end_nodes() );
11668 // just for debug dump resulting triangles
11669 dumpFunction(SMESH_Comment("swapDiagonals_F")<<helper.GetSubShapeID()<<"_"<<step);
11670 for ( size_t i = 0; i < triaCouples.size(); ++i )
11672 dumpChangeNodes( triaCouples[i].first );
11673 dumpChangeNodes( triaCouples[i].second );
11677 //================================================================================
11679 * \brief Move target node to it's final position on the FACE during shrinking
11681 //================================================================================
11683 bool _LayerEdge::SetNewLength2d( Handle(Geom_Surface)& surface,
11684 const TopoDS_Face& F,
11685 _EdgesOnShape& eos,
11686 SMESH_MesherHelper& helper )
11689 return false; // already at the target position
11691 SMDS_MeshNode* tgtNode = const_cast< SMDS_MeshNode*& >( _nodes.back() );
11693 if ( eos.SWOLType() == TopAbs_FACE )
11695 gp_XY curUV = helper.GetNodeUV( F, tgtNode );
11696 gp_Pnt2d tgtUV( _pos[0].X(), _pos[0].Y() );
11697 gp_Vec2d uvDir( _normal.X(), _normal.Y() );
11698 const double uvLen = tgtUV.Distance( curUV );
11699 const double kSafe = Max( 0.5, 1. - 0.1 * _simplices.size() );
11701 // Select shrinking step such that not to make faces with wrong orientation.
11702 double stepSize = 1e100;
11703 for ( size_t i = 0; i < _simplices.size(); ++i )
11705 if ( !_simplices[i]._nPrev->isMarked() ||
11706 !_simplices[i]._nNext->isMarked() )
11707 continue; // simplex of quadrangle created by addBoundaryElements()
11709 // find intersection of 2 lines: curUV-tgtUV and that connecting simplex nodes
11710 gp_XY uvN1 = helper.GetNodeUV( F, _simplices[i]._nPrev );
11711 gp_XY uvN2 = helper.GetNodeUV( F, _simplices[i]._nNext );
11712 gp_XY dirN = uvN2 - uvN1;
11713 double det = uvDir.Crossed( dirN );
11714 if ( Abs( det ) < std::numeric_limits<double>::min() ) continue;
11715 gp_XY dirN2Cur = curUV - uvN1;
11716 double step = dirN.Crossed( dirN2Cur ) / det;
11718 stepSize = Min( step, stepSize );
11721 if ( uvLen <= stepSize )
11727 else if ( stepSize > 0 )
11729 newUV = curUV + uvDir.XY() * stepSize * kSafe;
11735 SMDS_FacePositionPtr pos = tgtNode->GetPosition();
11736 pos->SetUParameter( newUV.X() );
11737 pos->SetVParameter( newUV.Y() );
11740 gp_Pnt p = surface->Value( newUV.X(), newUV.Y() );
11741 tgtNode->setXYZ( p.X(), p.Y(), p.Z() );
11742 dumpMove( tgtNode );
11745 else // _sWOL is TopAbs_EDGE
11747 const TopoDS_Edge& E = TopoDS::Edge( eos._sWOL );
11748 const SMDS_MeshNode* n2 = _simplices[0]._nPrev;
11749 SMDS_EdgePositionPtr tgtPos = tgtNode->GetPosition();
11751 const double u2 = helper.GetNodeU( E, n2, tgtNode );
11752 const double uSrc = _pos[0].Coord( U_SRC );
11753 const double lenTgt = _pos[0].Coord( LEN_TGT );
11755 double newU = _pos[0].Coord( U_TGT );
11756 if ( lenTgt < 0.99 * fabs( uSrc-u2 )) // n2 got out of src-tgt range
11758 Set( _LayerEdge::SHRUNK );
11763 newU = 0.1 * tgtPos->GetUParameter() + 0.9 * u2;
11765 tgtPos->SetUParameter( newU );
11767 gp_XY newUV = helper.GetNodeUV( F, tgtNode, _nodes[0]);
11768 gp_Pnt p = surface->Value( newUV.X(), newUV.Y() );
11769 tgtNode->setXYZ( p.X(), p.Y(), p.Z() );
11770 dumpMove( tgtNode );
11777 //================================================================================
11779 * \brief Perform smooth on the FACE
11780 * \retval bool - true if the node has been moved
11782 //================================================================================
11784 bool _SmoothNode::Smooth(int& nbBad,
11785 Handle(Geom_Surface)& surface,
11786 SMESH_MesherHelper& helper,
11787 const double refSign,
11791 const TopoDS_Face& face = TopoDS::Face( helper.GetSubShape() );
11793 // get uv of surrounding nodes
11794 vector<gp_XY> uv( _simplices.size() );
11795 for ( size_t i = 0; i < _simplices.size(); ++i )
11796 uv[i] = helper.GetNodeUV( face, _simplices[i]._nPrev, _node );
11798 // compute new UV for the node
11799 gp_XY newPos (0,0);
11800 if ( how == TFI && _simplices.size() == 4 )
11803 for ( size_t i = 0; i < _simplices.size(); ++i )
11804 if ( _simplices[i]._nOpp )
11805 corners[i] = helper.GetNodeUV( face, _simplices[i]._nOpp, _node );
11807 throw SALOME_Exception(LOCALIZED("TFI smoothing: _Simplex::_nOpp not set!"));
11809 newPos = helper.calcTFI ( 0.5, 0.5,
11810 corners[0], corners[1], corners[2], corners[3],
11811 uv[1], uv[2], uv[3], uv[0] );
11813 else if ( how == ANGULAR )
11815 newPos = computeAngularPos( uv, helper.GetNodeUV( face, _node ), refSign );
11817 else if ( how == CENTROIDAL && _simplices.size() > 3 )
11819 // average centers of diagonals wieghted with their reciprocal lengths
11820 if ( _simplices.size() == 4 )
11822 double w1 = 1. / ( uv[2]-uv[0] ).SquareModulus();
11823 double w2 = 1. / ( uv[3]-uv[1] ).SquareModulus();
11824 newPos = ( w1 * ( uv[2]+uv[0] ) + w2 * ( uv[3]+uv[1] )) / ( w1+w2 ) / 2;
11828 double sumWeight = 0;
11829 int nb = _simplices.size() == 4 ? 2 : _simplices.size();
11830 for ( int i = 0; i < nb; ++i )
11833 int iTo = i + _simplices.size() - 1;
11834 for ( int j = iFrom; j < iTo; ++j )
11836 int i2 = SMESH_MesherHelper::WrapIndex( j, _simplices.size() );
11837 double w = 1. / ( uv[i]-uv[i2] ).SquareModulus();
11839 newPos += w * ( uv[i]+uv[i2] );
11842 newPos /= 2 * sumWeight; // 2 is to get a middle between uv's
11847 // Laplacian smooth
11848 for ( size_t i = 0; i < _simplices.size(); ++i )
11850 newPos /= _simplices.size();
11853 // count quality metrics (orientation) of triangles around the node
11854 int nbOkBefore = 0;
11855 gp_XY tgtUV = helper.GetNodeUV( face, _node );
11856 for ( size_t i = 0; i < _simplices.size(); ++i )
11857 nbOkBefore += _simplices[i].IsForward( tgtUV, _node, face, helper, refSign );
11860 for ( size_t i = 0; i < _simplices.size(); ++i )
11861 nbOkAfter += _simplices[i].IsForward( newPos, _node, face, helper, refSign );
11863 if ( nbOkAfter < nbOkBefore )
11865 nbBad += _simplices.size() - nbOkBefore;
11869 SMDS_FacePositionPtr pos = _node->GetPosition();
11870 pos->SetUParameter( newPos.X() );
11871 pos->SetVParameter( newPos.Y() );
11878 gp_Pnt p = surface->Value( newPos.X(), newPos.Y() );
11879 const_cast< SMDS_MeshNode* >( _node )->setXYZ( p.X(), p.Y(), p.Z() );
11883 nbBad += _simplices.size() - nbOkAfter;
11884 return ( (tgtUV-newPos).SquareModulus() > 1e-10 );
11887 //================================================================================
11889 * \brief Computes new UV using angle based smoothing technique
11891 //================================================================================
11893 gp_XY _SmoothNode::computeAngularPos(vector<gp_XY>& uv,
11894 const gp_XY& uvToFix,
11895 const double refSign)
11897 uv.push_back( uv.front() );
11899 vector< gp_XY > edgeDir ( uv.size() );
11900 vector< double > edgeSize( uv.size() );
11901 for ( size_t i = 1; i < edgeDir.size(); ++i )
11903 edgeDir [i-1] = uv[i] - uv[i-1];
11904 edgeSize[i-1] = edgeDir[i-1].Modulus();
11905 if ( edgeSize[i-1] < numeric_limits<double>::min() )
11906 edgeDir[i-1].SetX( 100 );
11908 edgeDir[i-1] /= edgeSize[i-1] * refSign;
11910 edgeDir.back() = edgeDir.front();
11911 edgeSize.back() = edgeSize.front();
11915 double sumSize = 0;
11916 for ( size_t i = 1; i < edgeDir.size(); ++i )
11918 if ( edgeDir[i-1].X() > 1. ) continue;
11920 while ( edgeDir[i].X() > 1. && ++i < edgeDir.size() );
11921 if ( i == edgeDir.size() ) break;
11923 gp_XY norm1( -edgeDir[i1].Y(), edgeDir[i1].X() );
11924 gp_XY norm2( -edgeDir[i].Y(), edgeDir[i].X() );
11925 gp_XY bisec = norm1 + norm2;
11926 double bisecSize = bisec.Modulus();
11927 if ( bisecSize < numeric_limits<double>::min() )
11929 bisec = -edgeDir[i1] + edgeDir[i];
11930 bisecSize = bisec.Modulus();
11932 bisec /= bisecSize;
11934 gp_XY dirToN = uvToFix - p;
11935 double distToN = dirToN.Modulus();
11936 if ( bisec * dirToN < 0 )
11937 distToN = -distToN;
11939 newPos += ( p + bisec * distToN ) * ( edgeSize[i1] + edgeSize[i] );
11941 sumSize += edgeSize[i1] + edgeSize[i];
11943 newPos /= /*nbEdges * */sumSize;
11947 //================================================================================
11949 * \brief Keep a _LayerEdge inflated along the EDGE
11951 //================================================================================
11953 void _Shrinker1D::AddEdge( const _LayerEdge* e,
11954 _EdgesOnShape& eos,
11955 SMESH_MesherHelper& helper )
11958 if ( _nodes.empty() )
11960 _edges[0] = _edges[1] = 0;
11963 // check _LayerEdge
11964 if ( e == _edges[0] || e == _edges[1] || e->_nodes.size() < 2 )
11966 if ( eos.SWOLType() != TopAbs_EDGE )
11967 throw SALOME_Exception(LOCALIZED("Wrong _LayerEdge is added"));
11968 if ( _edges[0] && !_geomEdge.IsSame( eos._sWOL ))
11969 throw SALOME_Exception(LOCALIZED("Wrong _LayerEdge is added"));
11971 // store _LayerEdge
11972 _geomEdge = TopoDS::Edge( eos._sWOL );
11974 BRep_Tool::Range( _geomEdge, f,l );
11975 double u = helper.GetNodeU( _geomEdge, e->_nodes[0], e->_nodes.back());
11976 _edges[ u < 0.5*(f+l) ? 0 : 1 ] = e;
11980 const SMDS_MeshNode* tgtNode0 = TgtNode( 0 );
11981 const SMDS_MeshNode* tgtNode1 = TgtNode( 1 );
11983 if ( _nodes.empty() )
11985 SMESHDS_SubMesh * eSubMesh = helper.GetMeshDS()->MeshElements( _geomEdge );
11986 if ( !eSubMesh || eSubMesh->NbNodes() < 1 )
11988 TopLoc_Location loc;
11989 Handle(Geom_Curve) C = BRep_Tool::Curve( _geomEdge, loc, f,l );
11990 GeomAdaptor_Curve aCurve(C, f,l);
11991 const double totLen = GCPnts_AbscissaPoint::Length(aCurve, f, l);
11993 int nbExpectNodes = eSubMesh->NbNodes();
11994 _initU .reserve( nbExpectNodes );
11995 _normPar.reserve( nbExpectNodes );
11996 _nodes .reserve( nbExpectNodes );
11997 SMDS_NodeIteratorPtr nIt = eSubMesh->GetNodes();
11998 while ( nIt->more() )
12000 const SMDS_MeshNode* node = nIt->next();
12002 // skip refinement nodes
12003 if ( node->NbInverseElements(SMDSAbs_Edge) == 0 ||
12004 node == tgtNode0 || node == tgtNode1 )
12006 bool hasMarkedFace = false;
12007 SMDS_ElemIteratorPtr fIt = node->GetInverseElementIterator(SMDSAbs_Face);
12008 while ( fIt->more() && !hasMarkedFace )
12009 hasMarkedFace = fIt->next()->isMarked();
12010 if ( !hasMarkedFace )
12013 _nodes.push_back( node );
12014 _initU.push_back( helper.GetNodeU( _geomEdge, node ));
12015 double len = GCPnts_AbscissaPoint::Length(aCurve, f, _initU.back());
12016 _normPar.push_back( len / totLen );
12021 // remove target node of the _LayerEdge from _nodes
12022 size_t nbFound = 0;
12023 for ( size_t i = 0; i < _nodes.size(); ++i )
12024 if ( !_nodes[i] || _nodes[i] == tgtNode0 || _nodes[i] == tgtNode1 )
12025 _nodes[i] = 0, nbFound++;
12026 if ( nbFound == _nodes.size() )
12031 //================================================================================
12033 * \brief Move nodes on EDGE from ends where _LayerEdge's are inflated
12035 //================================================================================
12037 void _Shrinker1D::Compute(bool set3D, SMESH_MesherHelper& helper)
12039 if ( _done || _nodes.empty())
12041 const _LayerEdge* e = _edges[0];
12042 if ( !e ) e = _edges[1];
12045 _done = (( !_edges[0] || _edges[0]->Is( _LayerEdge::SHRUNK )) &&
12046 ( !_edges[1] || _edges[1]->Is( _LayerEdge::SHRUNK )));
12049 if ( set3D || _done )
12051 Handle(Geom_Curve) C = BRep_Tool::Curve(_geomEdge, f,l);
12052 GeomAdaptor_Curve aCurve(C, f,l);
12055 f = helper.GetNodeU( _geomEdge, _edges[0]->_nodes.back(), _nodes[0] );
12057 l = helper.GetNodeU( _geomEdge, _edges[1]->_nodes.back(), _nodes.back() );
12058 double totLen = GCPnts_AbscissaPoint::Length( aCurve, f, l );
12060 for ( size_t i = 0; i < _nodes.size(); ++i )
12062 if ( !_nodes[i] ) continue;
12063 double len = totLen * _normPar[i];
12064 GCPnts_AbscissaPoint discret( aCurve, len, f );
12065 if ( !discret.IsDone() )
12066 return throw SALOME_Exception(LOCALIZED("GCPnts_AbscissaPoint failed"));
12067 double u = discret.Parameter();
12068 SMDS_EdgePositionPtr pos = _nodes[i]->GetPosition();
12069 pos->SetUParameter( u );
12070 gp_Pnt p = C->Value( u );
12071 const_cast< SMDS_MeshNode*>( _nodes[i] )->setXYZ( p.X(), p.Y(), p.Z() );
12076 BRep_Tool::Range( _geomEdge, f,l );
12078 f = helper.GetNodeU( _geomEdge, _edges[0]->_nodes.back(), _nodes[0] );
12080 l = helper.GetNodeU( _geomEdge, _edges[1]->_nodes.back(), _nodes.back() );
12082 for ( size_t i = 0; i < _nodes.size(); ++i )
12084 if ( !_nodes[i] ) continue;
12085 double u = f * ( 1-_normPar[i] ) + l * _normPar[i];
12086 SMDS_EdgePositionPtr pos = _nodes[i]->GetPosition();
12087 pos->SetUParameter( u );
12092 //================================================================================
12094 * \brief Restore initial parameters of nodes on EDGE
12096 //================================================================================
12098 void _Shrinker1D::RestoreParams()
12101 for ( size_t i = 0; i < _nodes.size(); ++i )
12103 if ( !_nodes[i] ) continue;
12104 SMDS_EdgePositionPtr pos = _nodes[i]->GetPosition();
12105 pos->SetUParameter( _initU[i] );
12110 //================================================================================
12112 * \brief Replace source nodes by target nodes in shrunk mesh edges
12114 //================================================================================
12116 void _Shrinker1D::SwapSrcTgtNodes( SMESHDS_Mesh* mesh )
12118 const SMDS_MeshNode* nodes[3];
12119 for ( int i = 0; i < 2; ++i )
12121 if ( !_edges[i] ) continue;
12123 SMESHDS_SubMesh * eSubMesh = mesh->MeshElements( _geomEdge );
12124 if ( !eSubMesh ) return;
12125 const SMDS_MeshNode* srcNode = _edges[i]->_nodes[0];
12126 const SMDS_MeshNode* tgtNode = _edges[i]->_nodes.back();
12127 const SMDS_MeshNode* scdNode = _edges[i]->_nodes[1];
12128 SMDS_ElemIteratorPtr eIt = srcNode->GetInverseElementIterator(SMDSAbs_Edge);
12129 while ( eIt->more() )
12131 const SMDS_MeshElement* e = eIt->next();
12132 if ( !eSubMesh->Contains( e ) || e->GetNodeIndex( scdNode ) >= 0 )
12134 SMDS_ElemIteratorPtr nIt = e->nodesIterator();
12135 for ( int iN = 0; iN < e->NbNodes(); ++iN )
12137 const SMDS_MeshNode* n = static_cast<const SMDS_MeshNode*>( nIt->next() );
12138 nodes[iN] = ( n == srcNode ? tgtNode : n );
12140 mesh->ChangeElementNodes( e, nodes, e->NbNodes() );
12145 //================================================================================
12147 * \brief Creates 2D and 1D elements on boundaries of new prisms
12149 //================================================================================
12151 bool _ViscousBuilder::addBoundaryElements(_SolidData& data)
12153 SMESH_MesherHelper helper( *_mesh );
12155 vector< const SMDS_MeshNode* > faceNodes;
12157 //for ( size_t i = 0; i < _sdVec.size(); ++i )
12159 //_SolidData& data = _sdVec[i];
12160 TopTools_IndexedMapOfShape geomEdges;
12161 TopExp::MapShapes( data._solid, TopAbs_EDGE, geomEdges );
12162 for ( int iE = 1; iE <= geomEdges.Extent(); ++iE )
12164 const TopoDS_Edge& E = TopoDS::Edge( geomEdges(iE));
12165 const TGeomID edgeID = getMeshDS()->ShapeToIndex( E );
12166 if ( data._noShrinkShapes.count( edgeID ))
12169 // Get _LayerEdge's based on E
12171 map< double, const SMDS_MeshNode* > u2nodes;
12172 if ( !SMESH_Algo::GetSortedNodesOnEdge( getMeshDS(), E, /*ignoreMedium=*/false, u2nodes))
12175 vector< _LayerEdge* > ledges; ledges.reserve( u2nodes.size() );
12176 TNode2Edge & n2eMap = data._n2eMap;
12177 map< double, const SMDS_MeshNode* >::iterator u2n = u2nodes.begin();
12179 //check if 2D elements are needed on E
12180 TNode2Edge::iterator n2e = n2eMap.find( u2n->second );
12181 if ( n2e == n2eMap.end() ) continue; // no layers on vertex
12182 ledges.push_back( n2e->second );
12184 if (( n2e = n2eMap.find( u2n->second )) == n2eMap.end() )
12185 continue; // no layers on E
12186 ledges.push_back( n2eMap[ u2n->second ]);
12188 const SMDS_MeshNode* tgtN0 = ledges[0]->_nodes.back();
12189 const SMDS_MeshNode* tgtN1 = ledges[1]->_nodes.back();
12190 int nbSharedPyram = 0;
12191 SMDS_ElemIteratorPtr vIt = tgtN1->GetInverseElementIterator(SMDSAbs_Volume);
12192 while ( vIt->more() )
12194 const SMDS_MeshElement* v = vIt->next();
12195 nbSharedPyram += int( v->GetNodeIndex( tgtN0 ) >= 0 );
12197 if ( nbSharedPyram > 1 )
12198 continue; // not free border of the pyramid
12201 faceNodes.push_back( ledges[0]->_nodes[0] );
12202 faceNodes.push_back( ledges[1]->_nodes[0] );
12203 if ( ledges[0]->_nodes.size() > 1 ) faceNodes.push_back( ledges[0]->_nodes[1] );
12204 if ( ledges[1]->_nodes.size() > 1 ) faceNodes.push_back( ledges[1]->_nodes[1] );
12206 if ( getMeshDS()->FindElement( faceNodes, SMDSAbs_Face, /*noMedium=*/true))
12207 continue; // faces already created
12209 for ( ++u2n; u2n != u2nodes.end(); ++u2n )
12210 ledges.push_back( n2eMap[ u2n->second ]);
12212 // Find out orientation and type of face to create
12214 bool reverse = false, isOnFace;
12217 map< TGeomID, TopoDS_Shape >::iterator e2f = data._shrinkShape2Shape.find( edgeID );
12218 if (( isOnFace = ( e2f != data._shrinkShape2Shape.end() )))
12220 F = e2f->second.Oriented( TopAbs_FORWARD );
12221 reverse = ( helper.GetSubShapeOri( F, E ) == TopAbs_REVERSED );
12222 if ( helper.GetSubShapeOri( data._solid, F ) == TopAbs_REVERSED )
12223 reverse = !reverse, F.Reverse();
12224 if ( helper.IsReversedSubMesh( TopoDS::Face(F) ))
12225 reverse = !reverse;
12227 else if ( !data._ignoreFaceIds.count( e2f->first ))
12229 // find FACE with layers sharing E
12230 PShapeIteratorPtr fIt = helper.GetAncestors( E, *_mesh, TopAbs_FACE, &data._solid );
12232 F = *( fIt->next() );
12234 // Find the sub-mesh to add new faces
12235 SMESHDS_SubMesh* sm = 0;
12237 sm = getMeshDS()->MeshElements( F );
12239 sm = data._proxyMesh->getFaceSubM( TopoDS::Face(F), /*create=*/true );
12241 return error("error in addBoundaryElements()", data._index);
12243 // Find a proxy sub-mesh of the FACE of an adjacent SOLID, which will use the new boundary
12244 // faces for 3D meshing (PAL23414)
12245 SMESHDS_SubMesh* adjSM = 0;
12248 const TGeomID faceID = sm->GetID();
12249 PShapeIteratorPtr soIt = helper.GetAncestors( F, *_mesh, TopAbs_SOLID );
12250 while ( const TopoDS_Shape* solid = soIt->next() )
12251 if ( !solid->IsSame( data._solid ))
12253 size_t iData = _solids.FindIndex( *solid ) - 1;
12254 if ( iData < _sdVec.size() &&
12255 _sdVec[ iData ]._ignoreFaceIds.count( faceID ) &&
12256 _sdVec[ iData ]._shrinkShape2Shape.count( edgeID ) == 0 )
12258 SMESH_ProxyMesh::SubMesh* proxySub =
12259 _sdVec[ iData ]._proxyMesh->getFaceSubM( TopoDS::Face( F ), /*create=*/false);
12260 if ( proxySub && proxySub->NbElements() > 0 )
12267 const int dj1 = reverse ? 0 : 1;
12268 const int dj2 = reverse ? 1 : 0;
12269 vector< const SMDS_MeshElement*> ff; // new faces row
12270 SMESHDS_Mesh* m = getMeshDS();
12271 for ( size_t j = 1; j < ledges.size(); ++j )
12273 vector< const SMDS_MeshNode*>& nn1 = ledges[j-dj1]->_nodes;
12274 vector< const SMDS_MeshNode*>& nn2 = ledges[j-dj2]->_nodes;
12275 ff.resize( std::max( nn1.size(), nn2.size() ), NULL );
12276 if ( nn1.size() == nn2.size() )
12279 for ( size_t z = 1; z < nn1.size(); ++z )
12280 sm->AddElement( ff[z-1] = m->AddFace( nn1[z-1], nn2[z-1], nn2[z], nn1[z] ));
12282 for ( size_t z = 1; z < nn1.size(); ++z )
12283 sm->AddElement( new SMDS_FaceOfNodes( nn1[z-1], nn2[z-1], nn2[z], nn1[z] ));
12285 else if ( nn1.size() == 1 )
12288 for ( size_t z = 1; z < nn2.size(); ++z )
12289 sm->AddElement( ff[z-1] = m->AddFace( nn1[0], nn2[z-1], nn2[z] ));
12291 for ( size_t z = 1; z < nn2.size(); ++z )
12292 sm->AddElement( new SMDS_FaceOfNodes( nn1[0], nn2[z-1], nn2[z] ));
12297 for ( size_t z = 1; z < nn1.size(); ++z )
12298 sm->AddElement( ff[z-1] = m->AddFace( nn1[z-1], nn2[0], nn1[z] ));
12300 for ( size_t z = 1; z < nn1.size(); ++z )
12301 sm->AddElement( new SMDS_FaceOfNodes( nn1[z-1], nn2[0], nn2[z] ));
12304 if ( adjSM ) // add faces to a proxy SM of the adjacent SOLID
12306 for ( size_t z = 0; z < ff.size(); ++z )
12308 adjSM->AddElement( ff[ z ]);
12314 for ( int isFirst = 0; isFirst < 2; ++isFirst )
12316 _LayerEdge* edge = isFirst ? ledges.front() : ledges.back();
12317 _EdgesOnShape* eos = data.GetShapeEdges( edge );
12318 if ( eos && eos->SWOLType() == TopAbs_EDGE )
12320 vector< const SMDS_MeshNode*>& nn = edge->_nodes;
12321 if ( nn.size() < 2 || nn[1]->NbInverseElements( SMDSAbs_Edge ) >= 2 )
12323 helper.SetSubShape( eos->_sWOL );
12324 helper.SetElementsOnShape( true );
12325 for ( size_t z = 1; z < nn.size(); ++z )
12326 helper.AddEdge( nn[z-1], nn[z] );
12330 } // loop on EDGE's
12331 } // loop on _SolidData's