1 // Copyright (C) 2007-2022 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_ViscousLayers2D.cxx
21 // Created : 23 Jul 2012
22 // Author : Edward AGAPOV (eap)
24 #include "StdMeshers_ViscousLayers2D.hxx"
26 #include "SMDS_EdgePosition.hxx"
27 #include "SMDS_FaceOfNodes.hxx"
28 #include "SMDS_FacePosition.hxx"
29 #include "SMDS_MeshNode.hxx"
30 #include "SMDS_SetIterator.hxx"
31 #include "SMESHDS_Group.hxx"
32 #include "SMESHDS_Hypothesis.hxx"
33 #include "SMESHDS_Mesh.hxx"
34 #include "SMESH_Algo.hxx"
35 #include "SMESH_ComputeError.hxx"
36 #include "SMESH_ControlsDef.hxx"
37 #include "SMESH_Gen.hxx"
38 #include "SMESH_Group.hxx"
39 #include "SMESH_HypoFilter.hxx"
40 #include "SMESH_Mesh.hxx"
41 #include "SMESH_MeshEditor.hxx"
42 #include "SMESH_MesherHelper.hxx"
43 #include "SMESH_ProxyMesh.hxx"
44 #include "SMESH_Quadtree.hxx"
45 #include "SMESH_subMesh.hxx"
46 #include "SMESH_subMeshEventListener.hxx"
47 #include "StdMeshers_FaceSide.hxx"
49 #include "utilities.h"
51 #include <BRepAdaptor_Curve.hxx>
52 #include <BRepAdaptor_Curve2d.hxx>
53 #include <BRep_Tool.hxx>
54 #include <Bnd_B2d.hxx>
55 #include <Bnd_B3d.hxx>
57 #include <GCPnts_AbscissaPoint.hxx>
58 #include <Geom2dAdaptor_Curve.hxx>
59 #include <Geom2dInt_GInter.hxx>
60 #include <Geom2d_Circle.hxx>
61 #include <Geom2d_Line.hxx>
62 #include <Geom2d_TrimmedCurve.hxx>
63 #include <GeomAdaptor_Curve.hxx>
64 #include <Geom_Circle.hxx>
65 #include <Geom_Curve.hxx>
66 #include <Geom_Line.hxx>
67 #include <Geom_TrimmedCurve.hxx>
68 #include <IntRes2d_IntersectionPoint.hxx>
69 #include <Precision.hxx>
70 #include <Standard_ErrorHandler.hxx>
71 #include <TColStd_Array1OfReal.hxx>
73 #include <TopExp_Explorer.hxx>
74 #include <TopTools_IndexedDataMapOfShapeListOfShape.hxx>
75 #include <TopTools_IndexedMapOfShape.hxx>
76 #include <TopTools_ListIteratorOfListOfShape.hxx>
77 #include <TopTools_ListOfShape.hxx>
78 #include <TopTools_MapOfShape.hxx>
80 #include <TopoDS_Edge.hxx>
81 #include <TopoDS_Face.hxx>
82 #include <TopoDS_Vertex.hxx>
86 #include <smIdType.hxx>
99 //================================================================================
104 //--------------------------------------------------------------------------------
106 * \brief Proxy Mesh of FACE with viscous layers. It's needed only to
107 * redefine newSubmesh().
109 struct _ProxyMeshOfFace : public SMESH_ProxyMesh
111 //---------------------------------------------------
112 // Proxy sub-mesh of an EDGE. It contains nodes in _uvPtStructVec.
113 struct _EdgeSubMesh : public SMESH_ProxyMesh::SubMesh
115 _EdgeSubMesh(const SMDS_Mesh* mesh, int index=0): SubMesh(mesh,index) {}
116 //virtual int NbElements() const { return _elements.size()+1; }
117 virtual smIdType NbNodes() const { return Max( 0, _uvPtStructVec.size()-2 ); }
118 void SetUVPtStructVec(UVPtStructVec& vec) { _uvPtStructVec.swap( vec ); }
119 UVPtStructVec& GetUVPtStructVec() { return _uvPtStructVec; }
121 _ProxyMeshOfFace(const SMESH_Mesh& mesh): SMESH_ProxyMesh(mesh) {}
122 _EdgeSubMesh* GetEdgeSubMesh(int ID) { return (_EdgeSubMesh*) getProxySubMesh(ID); }
123 virtual SubMesh* newSubmesh(int index=0) const { return new _EdgeSubMesh( GetMeshDS(), index); }
125 //--------------------------------------------------------------------------------
127 * \brief SMESH_subMeshEventListener used to store _ProxyMeshOfFace, computed
128 * by _ViscousBuilder2D, in a SMESH_subMesh of the FACE.
129 * This is to delete _ProxyMeshOfFace when StdMeshers_ViscousLayers2D
130 * hypothesis is modified
132 struct _ProxyMeshHolder : public SMESH_subMeshEventListener
134 _ProxyMeshHolder( const TopoDS_Face& face,
135 SMESH_ProxyMesh::Ptr& mesh)
136 : SMESH_subMeshEventListener( /*deletable=*/true, Name() )
138 SMESH_subMesh* faceSM = mesh->GetMesh()->GetSubMesh( face );
139 faceSM->SetEventListener( this, new _Data( mesh ), faceSM );
141 // Finds a proxy mesh of face
142 static SMESH_ProxyMesh::Ptr FindProxyMeshOfFace( const TopoDS_Shape& face,
145 SMESH_ProxyMesh::Ptr proxy;
146 SMESH_subMesh* faceSM = mesh.GetSubMesh( face );
147 if ( EventListenerData* ld = faceSM->GetEventListenerData( Name() ))
148 proxy = static_cast< _Data* >( ld )->_mesh;
152 void ProcessEvent(const int event,
154 SMESH_subMesh* /*subMesh*/,
155 EventListenerData* data,
156 const SMESH_Hypothesis* /*hyp*/)
158 if ( event == SMESH_subMesh::CLEAN && eventType == SMESH_subMesh::COMPUTE_EVENT)
159 ((_Data*) data)->_mesh.reset();
162 // holder of a proxy mesh
163 struct _Data : public SMESH_subMeshEventListenerData
165 SMESH_ProxyMesh::Ptr _mesh;
166 _Data( SMESH_ProxyMesh::Ptr& mesh )
167 :SMESH_subMeshEventListenerData( /*isDeletable=*/true), _mesh( mesh )
170 // Returns identifier string
171 static const char* Name() { return "VISCOUS_2D::_ProxyMeshHolder"; }
175 //--------------------------------------------------------------------------------
177 * \brief Segment connecting inner ends of two _LayerEdge's.
181 const gp_XY* _uv[2]; // pointer to _LayerEdge::_uvIn
182 int _indexInLine; // position in _PolyLine
185 _Segment(const gp_XY& p1, const gp_XY& p2):_indexInLine(-1) { _uv[0] = &p1; _uv[1] = &p2; }
186 const gp_XY& p1() const { return *_uv[0]; }
187 const gp_XY& p2() const { return *_uv[1]; }
189 //--------------------------------------------------------------------------------
191 * \brief Tree of _Segment's used for a faster search of _Segment's.
193 struct _SegmentTree : public SMESH_Quadtree
195 typedef boost::shared_ptr< _SegmentTree > Ptr;
197 _SegmentTree( const vector< _Segment >& segments );
198 void GetSegmentsNear( const _Segment& seg, vector< const _Segment* >& found );
199 void GetSegmentsNear( const gp_Ax2d& ray, vector< const _Segment* >& found );
202 _SegmentTree* newChild() const { return new _SegmentTree; }
203 void buildChildrenData();
204 Bnd_B2d* buildRootBox();
206 static int maxNbSegInLeaf() { return 5; }
209 const _Segment* _seg;
211 void Set( const _Segment& seg )
214 _iMin[0] = ( seg._uv[1]->X() < seg._uv[0]->X() );
215 _iMin[1] = ( seg._uv[1]->Y() < seg._uv[0]->Y() );
217 bool IsOut( const _Segment& seg ) const;
218 bool IsOut( const gp_Ax2d& ray ) const;
220 vector< _SegBox > _segments;
222 //--------------------------------------------------------------------------------
224 * \brief Edge normal to FACE boundary, connecting a point on EDGE (_uvOut)
225 * and a point of a layer internal boundary (_uvIn)
229 gp_XY _uvOut; // UV on the FACE boundary
230 gp_XY _uvIn; // UV inside the FACE
231 double _length2D; // distance between _uvOut and _uvIn
233 bool _isBlocked;// is more inflation possible or not
235 gp_XY _normal2D; // to curve
236 double _len2dTo3dRatio; // to pass 2D <--> 3D
237 gp_Ax2d _ray; // a ray starting at _uvOut
239 vector<gp_XY> _uvRefined; // divisions by layers
241 bool SetNewLength( const double length );
247 //--------------------------------------------------------------------------------
249 * \brief Poly line composed of _Segment's of one EDGE.
250 * It's used to detect intersection of inflated layers by intersecting
255 StdMeshers_FaceSide* _wire;
256 int _edgeInd; // index of my EDGE in _wire
257 bool _advancable; // true if there is a viscous layer on my EDGE
258 bool _isStraight2D;// pcurve type
259 _PolyLine* _leftLine; // lines of neighbour EDGE's
260 _PolyLine* _rightLine;
261 int _firstPntInd; // index in vector<UVPtStruct> of _wire
263 int _index; // index in _ViscousBuilder2D::_polyLineVec
265 vector< _LayerEdge > _lEdges; /* _lEdges[0] is usually is not treated
266 as it is equal to the last one of the _leftLine */
267 vector< _Segment > _segments; // segments connecting _uvIn's of _lEdges
268 _SegmentTree::Ptr _segTree;
270 vector< _PolyLine* > _reachableLines; // lines able to interfere with my layer
272 vector< const SMDS_MeshNode* > _leftNodes; // nodes built from a left VERTEX
273 vector< const SMDS_MeshNode* > _rightNodes; // nodes built from a right VERTEX
275 typedef vector< _Segment >::iterator TSegIterator;
276 typedef vector< _LayerEdge >::iterator TEdgeIterator;
278 TIDSortedElemSet _newFaces; // faces generated from this line
280 bool IsCommonEdgeShared( const _PolyLine& other );
281 size_t FirstLEdge() const
283 return ( _leftLine->_advancable && _lEdges.size() > 2 ) ? 1 : 0;
285 bool IsAdjacent( const _Segment& seg, const _LayerEdge* LE=0 ) const
287 if ( LE /*&& seg._indexInLine < _lEdges.size()*/ )
288 return ( seg._uv[0] == & LE->_uvIn ||
289 seg._uv[1] == & LE->_uvIn );
290 return ( & seg == &_leftLine->_segments.back() ||
291 & seg == &_rightLine->_segments[0] );
293 bool IsConcave() const;
295 //--------------------------------------------------------------------------------
297 * \brief Intersector of _Segment's
299 struct _SegmentIntersection
301 gp_XY _vec1, _vec2; // Vec( _seg.p1(), _seg.p2() )
302 gp_XY _vec21; // Vec( _seg2.p1(), _seg1.p1() )
303 double _D; // _vec1.Crossed( _vec2 )
304 double _param1, _param2; // intersection param on _seg1 and _seg2
306 _SegmentIntersection(): _D(0), _param1(0), _param2(0) {}
308 bool Compute(const _Segment& seg1, const _Segment& seg2, bool seg2IsRay = false )
310 // !!! If seg2IsRay, returns true at any _param2 !!!
311 const double eps = 1e-10;
312 _vec1 = seg1.p2() - seg1.p1();
313 _vec2 = seg2.p2() - seg2.p1();
314 _vec21 = seg1.p1() - seg2.p1();
315 _D = _vec1.Crossed(_vec2);
316 if ( fabs(_D) < std::numeric_limits<double>::min())
318 _param1 = _vec2.Crossed(_vec21) / _D;
319 if (_param1 < -eps || _param1 > 1 + eps )
321 _param2 = _vec1.Crossed(_vec21) / _D;
322 return seg2IsRay || ( _param2 > -eps && _param2 < 1 + eps );
324 bool Compute( const _Segment& seg1, const gp_Ax2d& ray )
326 gp_XY segEnd = ray.Location().XY() + ray.Direction().XY();
327 _Segment seg2( ray.Location().XY(), segEnd );
328 return Compute( seg1, seg2, true );
330 //gp_XY GetPoint() { return _seg1.p1() + _param1 * _vec1; }
332 //--------------------------------------------------------------------------------
334 typedef map< const SMDS_MeshNode*, _LayerEdge*, TIDCompare > TNode2Edge;
335 typedef StdMeshers_ViscousLayers2D THypVL;
337 //--------------------------------------------------------------------------------
339 * \brief Builder of viscous layers
341 class _ViscousBuilder2D
344 _ViscousBuilder2D(SMESH_Mesh& theMesh,
345 const TopoDS_Face& theFace,
346 vector< const THypVL* > & theHyp,
347 vector< TopoDS_Shape > & theHypShapes);
348 SMESH_ComputeErrorPtr GetError() const { return _error; }
350 SMESH_ProxyMesh::Ptr Compute();
354 friend class ::StdMeshers_ViscousLayers2D;
356 bool findEdgesWithLayers();
357 bool makePolyLines();
359 bool fixCollisions();
363 bool toShrinkForAdjacent( const TopoDS_Face& adjFace,
364 const TopoDS_Edge& E,
365 const TopoDS_Vertex& V);
366 void setLenRatio( _LayerEdge& LE, const gp_Pnt& pOut );
367 void setLayerEdgeData( _LayerEdge& lEdge,
369 Handle(Geom2d_Curve)& pcurve,
370 Handle(Geom_Curve)& curve,
373 GeomAPI_ProjectPointOnSurf* faceProj);
374 void adjustCommonEdge( _PolyLine& LL, _PolyLine& LR );
375 void calcLayersHeight(const double totalThick,
376 vector<double>& heights,
378 bool removeMeshFaces(const TopoDS_Shape& face);
380 const THypVL* getLineHypothesis(int iPL);
381 double getLineThickness (int iPL);
383 bool error( const string& text );
384 SMESHDS_Mesh* getMeshDS() { return _mesh->GetMeshDS(); }
385 _ProxyMeshOfFace* getProxyMesh();
388 //void makeGroupOfLE();
395 vector< const THypVL* > _hyps;
396 vector< TopoDS_Shape > _hypShapes;
399 SMESH_ProxyMesh::Ptr _proxyMesh;
400 SMESH_ComputeErrorPtr _error;
403 Handle(Geom_Surface) _surface;
404 SMESH_MesherHelper _helper;
405 TSideVector _faceSideVec; // wires (StdMeshers_FaceSide) of _face
406 vector<_PolyLine> _polyLineVec; // fronts to advance
407 vector< const THypVL* > _hypOfEdge; // a hyp per an EDGE of _faceSideVec
408 bool _is2DIsotropic; // is same U and V resoulution of _face
409 vector<TopoDS_Face> _clearedFaces; // FACEs whose mesh was removed by shrink()
411 //double _fPowN; // to compute thickness of layers
412 double _maxThickness; // max possible layers thickness
414 // sub-shapes of _face
415 set<TGeomID> _ignoreShapeIds; // ids of EDGEs w/o layers
416 set<TGeomID> _noShrinkVert; // ids of VERTEXes that are extremities
417 // of EDGEs along which _LayerEdge can't be inflated because no viscous layers
418 // defined on neighbour FACEs sharing an EDGE. Nonetheless _LayerEdge's
419 // are inflated along such EDGEs but then such _LayerEdge's are turned into
420 // a node on VERTEX, i.e. all nodes on a _LayerEdge are melded into one node.
422 int _nbLE; // for DEBUG
425 //================================================================================
427 * \brief Returns StdMeshers_ViscousLayers2D for the FACE
429 bool findHyps(SMESH_Mesh& theMesh,
430 const TopoDS_Face& theFace,
431 vector< const StdMeshers_ViscousLayers2D* > & theHyps,
432 vector< TopoDS_Shape > & theAssignedTo)
435 theAssignedTo.clear();
436 SMESH_HypoFilter hypFilter
437 ( SMESH_HypoFilter::HasName( StdMeshers_ViscousLayers2D::GetHypType() ));
438 list< const SMESHDS_Hypothesis * > hypList;
439 list< TopoDS_Shape > hypShapes;
440 int nbHyps = theMesh.GetHypotheses
441 ( theFace, hypFilter, hypList, /*ancestors=*/true, &hypShapes );
444 theHyps.reserve( nbHyps );
445 theAssignedTo.reserve( nbHyps );
446 list< const SMESHDS_Hypothesis * >::iterator hyp = hypList.begin();
447 list< TopoDS_Shape >::iterator shape = hypShapes.begin();
448 for ( ; hyp != hypList.end(); ++hyp, ++shape )
450 theHyps.push_back( static_cast< const StdMeshers_ViscousLayers2D* > ( *hyp ));
451 theAssignedTo.push_back( *shape );
457 //================================================================================
459 * \brief Returns ids of EDGEs not to create Viscous Layers on
460 * \param [in] theHyp - the hypothesis, holding edges either to ignore or not to.
461 * \param [in] theFace - the FACE whose EDGEs are checked.
462 * \param [in] theMesh - the mesh.
463 * \param [in,out] theEdgeIds - container returning EDGEs to ignore.
464 * \return int - number of found EDGEs of the FACE.
466 //================================================================================
468 int getEdgesToIgnore( const StdMeshers_ViscousLayers2D* theHyp,
469 const TopoDS_Shape& theFace,
470 const SMESHDS_Mesh* theMesh,
471 set< int > & theEdgeIds)
473 int nbEdgesToIgnore = 0;
474 vector<TGeomID> ids = theHyp->GetBndShapes();
475 if ( theHyp->IsToIgnoreShapes() ) // EDGEs to ignore are given
477 for ( size_t i = 0; i < ids.size(); ++i )
479 const TopoDS_Shape& E = theMesh->IndexToShape( ids[i] );
481 E.ShapeType() == TopAbs_EDGE &&
482 SMESH_MesherHelper::IsSubShape( E, theFace ))
484 theEdgeIds.insert( ids[i] );
489 else // EDGEs to make the Viscous Layers on are given
491 TopExp_Explorer E( theFace, TopAbs_EDGE );
492 for ( ; E.More(); E.Next(), ++nbEdgesToIgnore )
493 theEdgeIds.insert( theMesh->ShapeToIndex( E.Current() ));
495 for ( size_t i = 0; i < ids.size(); ++i )
496 nbEdgesToIgnore -= theEdgeIds.erase( ids[i] );
498 return nbEdgesToIgnore;
501 } // namespace VISCOUS_2D
503 //================================================================================
504 // StdMeshers_ViscousLayers hypothesis
506 StdMeshers_ViscousLayers2D::StdMeshers_ViscousLayers2D(int hypId, SMESH_Gen* gen)
507 :StdMeshers_ViscousLayers(hypId, gen)
509 _name = StdMeshers_ViscousLayers2D::GetHypType();
510 _param_algo_dim = -2; // auxiliary hyp used by 2D algos
512 // --------------------------------------------------------------------------------
513 bool StdMeshers_ViscousLayers2D::SetParametersByMesh(const SMESH_Mesh* /*theMesh*/,
514 const TopoDS_Shape& /*theShape*/)
519 // --------------------------------------------------------------------------------
521 StdMeshers_ViscousLayers2D::Compute(SMESH_Mesh& theMesh,
522 const TopoDS_Face& theFace)
524 using namespace VISCOUS_2D;
525 vector< const StdMeshers_ViscousLayers2D* > hyps;
526 vector< TopoDS_Shape > hypShapes;
528 SMESH_ProxyMesh::Ptr pm = _ProxyMeshHolder::FindProxyMeshOfFace( theFace, theMesh );
531 if ( findHyps( theMesh, theFace, hyps, hypShapes ))
533 VISCOUS_2D::_ViscousBuilder2D builder( theMesh, theFace, hyps, hypShapes );
534 pm = builder.Compute();
535 SMESH_ComputeErrorPtr error = builder.GetError();
536 if ( error && !error->IsOK() )
537 theMesh.GetSubMesh( theFace )->GetComputeError() = error;
539 pm.reset( new SMESH_ProxyMesh( theMesh ));
540 if ( getenv("__ONLY__VL2D__"))
545 pm.reset( new SMESH_ProxyMesh( theMesh ));
550 // --------------------------------------------------------------------------------
551 void StdMeshers_ViscousLayers2D::SetProxyMeshOfEdge( const StdMeshers_FaceSide& edgeNodes )
553 using namespace VISCOUS_2D;
554 SMESH_ProxyMesh::Ptr pm =
555 _ProxyMeshHolder::FindProxyMeshOfFace( edgeNodes.Face(), *edgeNodes.GetMesh() );
557 _ProxyMeshOfFace* proxyMeshOfFace = new _ProxyMeshOfFace( *edgeNodes.GetMesh() );
558 pm.reset( proxyMeshOfFace );
559 new _ProxyMeshHolder( edgeNodes.Face(), pm );
561 _ProxyMeshOfFace* proxyMeshOfFace = static_cast<_ProxyMeshOfFace*>( pm.get() );
562 _ProxyMeshOfFace::_EdgeSubMesh* sm = proxyMeshOfFace->GetEdgeSubMesh( edgeNodes.EdgeID(0) );
563 sm->GetUVPtStructVec() = edgeNodes.GetUVPtStruct();
565 // --------------------------------------------------------------------------------
566 bool StdMeshers_ViscousLayers2D::HasProxyMesh( const TopoDS_Face& face, SMESH_Mesh& mesh )
568 return VISCOUS_2D::_ProxyMeshHolder::FindProxyMeshOfFace( face, mesh ).get();
570 // --------------------------------------------------------------------------------
571 SMESH_ComputeErrorPtr
572 StdMeshers_ViscousLayers2D::CheckHypothesis(SMESH_Mesh& theMesh,
573 const TopoDS_Shape& theShape,
574 SMESH_Hypothesis::Hypothesis_Status& theStatus)
576 SMESH_ComputeErrorPtr error = SMESH_ComputeError::New(COMPERR_OK);
577 theStatus = SMESH_Hypothesis::HYP_OK;
579 TopExp_Explorer exp( theShape, TopAbs_FACE );
580 for ( ; exp.More() && theStatus == SMESH_Hypothesis::HYP_OK; exp.Next() )
582 const TopoDS_Face& face = TopoDS::Face( exp.Current() );
583 vector< const StdMeshers_ViscousLayers2D* > hyps;
584 vector< TopoDS_Shape > hypShapes;
585 if ( VISCOUS_2D::findHyps( theMesh, face, hyps, hypShapes ))
587 VISCOUS_2D::_ViscousBuilder2D builder( theMesh, face, hyps, hypShapes );
588 builder._faceSideVec =
589 StdMeshers_FaceSide::GetFaceWires( face, theMesh, true, error,
590 NULL, SMESH_ProxyMesh::Ptr(),
591 /*theCheckVertexNodes=*/false);
592 if ( error->IsOK() && !builder.findEdgesWithLayers())
594 error = builder.GetError();
595 if ( error && !error->IsOK() )
596 theStatus = SMESH_Hypothesis::HYP_INCOMPAT_HYPS;
602 // --------------------------------------------------------------------------------
603 void StdMeshers_ViscousLayers2D::RestoreListeners() const
605 StudyContextStruct* sc = _gen->GetStudyContext();
606 std::map < int, SMESH_Mesh * >::iterator i_smesh = sc->mapMesh.begin();
607 for ( ; i_smesh != sc->mapMesh.end(); ++i_smesh )
609 SMESH_Mesh* smesh = i_smesh->second;
611 !smesh->HasShapeToMesh() ||
612 !smesh->GetMeshDS() ||
613 !smesh->GetMeshDS()->IsUsedHypothesis( this ))
616 // set event listeners to EDGE's of FACE where this hyp is used
617 TopoDS_Shape shape = i_smesh->second->GetShapeToMesh();
618 for ( TopExp_Explorer face( shape, TopAbs_FACE); face.More(); face.Next() )
619 if ( SMESH_Algo* algo = _gen->GetAlgo( *smesh, face.Current() ))
621 const std::list <const SMESHDS_Hypothesis *> & usedHyps =
622 algo->GetUsedHypothesis( *smesh, face.Current(), /*ignoreAuxiliary=*/false );
623 if ( std::find( usedHyps.begin(), usedHyps.end(), this ) != usedHyps.end() )
624 for ( TopExp_Explorer edge( face.Current(), TopAbs_EDGE); edge.More(); edge.Next() )
625 VISCOUS_3D::ToClearSubWithMain( smesh->GetSubMesh( edge.Current() ), face.Current() );
629 // END StdMeshers_ViscousLayers2D hypothesis
630 //================================================================================
632 using namespace VISCOUS_2D;
634 //================================================================================
636 * \brief Constructor of _ViscousBuilder2D
638 //================================================================================
640 _ViscousBuilder2D::_ViscousBuilder2D(SMESH_Mesh& theMesh,
641 const TopoDS_Face& theFace,
642 vector< const THypVL* > & theHyps,
643 vector< TopoDS_Shape > & theAssignedTo):
644 _mesh( &theMesh ), _face( theFace ), _helper( theMesh )
646 _hyps.swap( theHyps );
647 _hypShapes.swap( theAssignedTo );
649 _helper.SetSubShape( _face );
650 _helper.SetElementsOnShape( true );
652 _face.Orientation( TopAbs_FORWARD ); // 2D logic works only in this case
653 _surface = BRep_Tool::Surface( _face );
655 _error = SMESH_ComputeError::New(COMPERR_OK);
660 //================================================================================
662 * \brief Stores error description and returns false
664 //================================================================================
666 bool _ViscousBuilder2D::error(const string& text )
668 _error->myName = COMPERR_ALGO_FAILED;
669 _error->myComment = string("Viscous layers builder 2D: ") + text;
670 if ( SMESH_subMesh* sm = _mesh->GetSubMesh( _face ) )
672 SMESH_ComputeErrorPtr& smError = sm->GetComputeError();
673 if ( smError && smError->myAlgo )
674 _error->myAlgo = smError->myAlgo;
678 cout << "_ViscousBuilder2D::error " << text << endl;
683 //================================================================================
685 * \brief Does its job
687 //================================================================================
689 SMESH_ProxyMesh::Ptr _ViscousBuilder2D::Compute()
691 _faceSideVec = StdMeshers_FaceSide::GetFaceWires( _face, *_mesh, true, _error, &_helper );
693 if ( !_error->IsOK() )
696 if ( !findEdgesWithLayers() ) // analysis of a shape
699 if ( ! makePolyLines() ) // creation of fronts
702 if ( ! inflate() ) // advance fronts
705 // remove elements and nodes from _face
706 removeMeshFaces( _face );
708 if ( !shrink() ) // shrink segments on edges w/o layers
711 if ( ! refine() ) // make faces
719 //================================================================================
721 * \brief Finds EDGE's to make viscous layers on.
723 //================================================================================
725 bool _ViscousBuilder2D::findEdgesWithLayers()
727 // collect all EDGEs to ignore defined by _hyps
728 typedef std::pair< set<TGeomID>, const THypVL* > TEdgesOfHyp;
729 vector< TEdgesOfHyp > ignoreEdgesOfHyp( _hyps.size() );
730 for ( size_t i = 0; i < _hyps.size(); ++i )
732 ignoreEdgesOfHyp[i].second = _hyps[i];
733 getEdgesToIgnore( _hyps[i], _face, getMeshDS(), ignoreEdgesOfHyp[i].first );
736 // get all shared EDGEs
737 TopTools_MapOfShape sharedEdges;
738 TopTools_IndexedMapOfShape hypFaces; // faces with VL hyps
739 for ( size_t i = 0; i < _hypShapes.size(); ++i )
740 TopExp::MapShapes( _hypShapes[i], TopAbs_FACE, hypFaces );
741 TopTools_IndexedDataMapOfShapeListOfShape facesOfEdgeMap;
742 for ( int iF = 1; iF <= hypFaces.Extent(); ++iF )
743 TopExp::MapShapesAndAncestors( hypFaces(iF), TopAbs_EDGE, TopAbs_FACE, facesOfEdgeMap);
744 for ( int iE = 1; iE <= facesOfEdgeMap.Extent(); ++iE )
745 if ( facesOfEdgeMap( iE ).Extent() > 1 )
746 sharedEdges.Add( facesOfEdgeMap.FindKey( iE ));
749 if ( _hyps.size() > 1 )
751 // check if two hypotheses define different parameters for the same EDGE
752 for ( size_t iWire = 0; iWire < _faceSideVec.size(); ++iWire )
754 StdMeshers_FaceSidePtr wire = _faceSideVec[ iWire ];
755 for ( int iE = 0; iE < wire->NbEdges(); ++iE )
757 const THypVL* hyp = 0;
758 const TGeomID edgeID = wire->EdgeID( iE );
759 if ( !sharedEdges.Contains( wire->Edge( iE )))
761 for ( size_t i = 0; i < ignoreEdgesOfHyp.size(); ++i )
762 if ( ! ignoreEdgesOfHyp[i].first.count( edgeID ))
765 return error(SMESH_Comment("Several hypotheses define "
766 "Viscous Layers on the edge #") << edgeID );
767 hyp = ignoreEdgesOfHyp[i].second;
770 _hypOfEdge.push_back( hyp );
772 _ignoreShapeIds.insert( edgeID );
774 // check if two hypotheses define different number of viscous layers for
776 const THypVL *hyp, *prevHyp = _hypOfEdge.back();
777 size_t iH = _hypOfEdge.size() - wire->NbEdges();
778 for ( ; iH < _hypOfEdge.size(); ++iH )
780 hyp = _hypOfEdge[ iH ];
781 if ( hyp && prevHyp &&
782 hyp->GetNumberLayers() != prevHyp->GetNumberLayers() )
784 return error("Two hypotheses define different number of "
785 "viscous layers on adjacent edges");
791 else if ( _hyps.size() == 1 )
793 _ignoreShapeIds.swap( ignoreEdgesOfHyp[0].first );
796 // check all EDGEs of the _face to fill _ignoreShapeIds and _noShrinkVert
798 int totalNbEdges = 0;
799 for ( size_t iWire = 0; iWire < _faceSideVec.size(); ++iWire )
801 StdMeshers_FaceSidePtr wire = _faceSideVec[ iWire ];
802 totalNbEdges += wire->NbEdges();
803 for ( int iE = 0; iE < wire->NbEdges(); ++iE )
805 if ( sharedEdges.Contains( wire->Edge( iE )))
807 // ignore internal EDGEs (shared by several FACEs)
808 const TGeomID edgeID = wire->EdgeID( iE );
809 _ignoreShapeIds.insert( edgeID );
811 // check if ends of an EDGE are to be added to _noShrinkVert
812 const TopTools_ListOfShape& faceList = facesOfEdgeMap.FindFromKey( wire->Edge( iE ));
813 TopTools_ListIteratorOfListOfShape faceIt( faceList );
814 for ( ; faceIt.More(); faceIt.Next() )
816 const TopoDS_Shape& neighbourFace = faceIt.Value();
817 if ( neighbourFace.IsSame( _face )) continue;
818 SMESH_Algo* algo = _mesh->GetGen()->GetAlgo( *_mesh, neighbourFace );
819 if ( !algo ) continue;
821 const StdMeshers_ViscousLayers2D* viscHyp = 0;
822 const list <const SMESHDS_Hypothesis *> & allHyps =
823 algo->GetUsedHypothesis(*_mesh, neighbourFace, /*noAuxiliary=*/false);
824 list< const SMESHDS_Hypothesis *>::const_iterator hyp = allHyps.begin();
825 for ( ; hyp != allHyps.end() && !viscHyp; ++hyp )
826 viscHyp = dynamic_cast<const StdMeshers_ViscousLayers2D*>( *hyp );
828 // set<TGeomID> neighbourIgnoreEdges;
830 // getEdgesToIgnore( viscHyp, neighbourFace, getMeshDS(), neighbourIgnoreEdges );
832 for ( int iV = 0; iV < 2; ++iV )
834 TopoDS_Vertex vertex = iV ? wire->LastVertex(iE) : wire->FirstVertex(iE);
836 _noShrinkVert.insert( getMeshDS()->ShapeToIndex( vertex ));
839 PShapeIteratorPtr edgeIt = _helper.GetAncestors( vertex, *_mesh, TopAbs_EDGE );
840 while ( const TopoDS_Shape* edge = edgeIt->next() )
841 if ( !edge->IsSame( wire->Edge( iE )) &&
842 _helper.IsSubShape( *edge, neighbourFace ))
844 const TGeomID neighbourID = getMeshDS()->ShapeToIndex( *edge );
845 bool hasVL = !sharedEdges.Contains( *edge );
849 for ( hyp = allHyps.begin(); hyp != allHyps.end() && !hasVL; ++hyp )
850 if (( viscHyp = dynamic_cast<const THypVL*>( *hyp )))
851 hasVL = viscHyp->IsShapeWithLayers( neighbourID );
855 _noShrinkVert.insert( getMeshDS()->ShapeToIndex( vertex ));
866 int nbMyEdgesIgnored = _ignoreShapeIds.size();
868 // add VERTEXes w/o layers to _ignoreShapeIds (this is used by toShrinkForAdjacent())
869 // for ( size_t iWire = 0; iWire < _faceSideVec.size(); ++iWire )
871 // StdMeshers_FaceSidePtr wire = _faceSideVec[ iWire ];
872 // for ( int iE = 0; iE < wire->NbEdges(); ++iE )
874 // TGeomID edge1 = wire->EdgeID( iE );
875 // TGeomID edge2 = wire->EdgeID( iE+1 );
876 // if ( _ignoreShapeIds.count( edge1 ) && _ignoreShapeIds.count( edge2 ))
877 // _ignoreShapeIds.insert( getMeshDS()->ShapeToIndex( wire->LastVertex( iE )));
881 return ( nbMyEdgesIgnored < totalNbEdges );
884 //================================================================================
886 * \brief Create the inner front of the viscous layers and prepare data for inflation
888 //================================================================================
890 bool _ViscousBuilder2D::makePolyLines()
892 // Create _PolyLines and _LayerEdge's
894 // count total nb of EDGEs to allocate _polyLineVec
896 for ( size_t iWire = 0; iWire < _faceSideVec.size(); ++iWire )
898 StdMeshers_FaceSidePtr wire = _faceSideVec[ iWire ];
899 nbEdges += wire->NbEdges();
900 if ( wire->GetUVPtStruct().empty() && wire->NbPoints() > 0 )
901 return error("Invalid node parameters on some EDGE");
903 _polyLineVec.resize( nbEdges );
905 // check if 2D normal should be computed by 3D one by means of projection
906 GeomAPI_ProjectPointOnSurf* faceProj = 0;
910 const UVPtStruct& uv = _faceSideVec[0]->GetUVPtStruct()[0];
911 gp_Pnt p = SMESH_TNodeXYZ( uv.node );
912 tmpLE._uvOut.SetCoord( uv.u, uv.v );
913 tmpLE._normal2D.SetCoord( 1., 0. );
914 setLenRatio( tmpLE, p );
915 const double r1 = tmpLE._len2dTo3dRatio;
916 tmpLE._normal2D.SetCoord( 0., 1. );
917 setLenRatio( tmpLE, p );
918 const double r2 = tmpLE._len2dTo3dRatio;
919 // projection is needed if two _len2dTo3dRatio's differ too much
920 const double maxR = Max( r2, r1 );
921 if ( Abs( r2-r1 )/maxR > 0.2*maxR )
922 faceProj = & _helper.GetProjector( _face, loc );
924 _is2DIsotropic = !faceProj;
926 // Assign data to _PolyLine's
927 // ---------------------------
930 for ( size_t iWire = 0; iWire < _faceSideVec.size(); ++iWire )
932 StdMeshers_FaceSidePtr wire = _faceSideVec[ iWire ];
933 const vector<UVPtStruct>& points = wire->GetUVPtStruct();
935 for ( int iE = 0; iE < wire->NbEdges(); ++iE )
937 _PolyLine& L = _polyLineVec[ iPoLine++ ];
938 L._index = iPoLine-1;
939 L._wire = wire.get();
941 L._advancable = !_ignoreShapeIds.count( wire->EdgeID( iE ));
943 int iRight = iPoLine - (( iE+1 < wire->NbEdges() ) ? 0 : wire->NbEdges() );
944 L._rightLine = &_polyLineVec[ iRight ];
945 _polyLineVec[ iRight ]._leftLine = &L;
947 L._firstPntInd = iPnt;
948 double lastNormPar = wire->LastParameter( iE ) - 1e-10;
949 while ( points[ iPnt ].normParam < lastNormPar )
951 L._lastPntInd = iPnt;
952 L._lEdges.resize( Max( 3, L._lastPntInd - L._firstPntInd + 1 )); // 3 edges minimum
954 // TODO: add more _LayerEdge's to strongly curved EDGEs
955 // in order not to miss collisions
958 Handle(Geom_Curve) curve = BRep_Tool::Curve( L._wire->Edge( iE ), loc, u, u );
959 Handle(Geom2d_Curve) pcurve = L._wire->Curve2d( L._edgeInd );
960 const bool reverse = (( L._wire->Edge( iE ).Orientation() == TopAbs_REVERSED ) ^
961 (_face.Orientation() == TopAbs_REVERSED ));
962 for ( int i = L._firstPntInd; i <= L._lastPntInd; ++i )
964 _LayerEdge& lEdge = L._lEdges[ i - L._firstPntInd ];
965 u = ( i == L._firstPntInd ? wire->FirstU(iE) : points[ i ].param );
966 p = SMESH_TNodeXYZ( points[ i ].node );
967 setLayerEdgeData( lEdge, u, pcurve, curve, p, reverse, faceProj );
968 setLenRatio( lEdge, p );
970 if ( L._lastPntInd - L._firstPntInd + 1 < 3 ) // add 3-d _LayerEdge in the middle
972 L._lEdges[2] = L._lEdges[1];
973 u = 0.5 * ( wire->FirstU(iE) + wire->LastU(iE) );
974 if ( !curve.IsNull() )
975 p = curve->Value( u );
977 p = 0.5 * ( SMESH_TNodeXYZ( points[ L._firstPntInd ].node ) +
978 SMESH_TNodeXYZ( points[ L._lastPntInd ].node ));
979 setLayerEdgeData( L._lEdges[1], u, pcurve, curve, p, reverse, faceProj );
980 setLenRatio( L._lEdges[1], p );
985 // Fill _PolyLine's with _segments
986 // --------------------------------
988 double maxLen2dTo3dRatio = 0;
989 for ( iPoLine = 0; iPoLine < _polyLineVec.size(); ++iPoLine )
991 _PolyLine& L = _polyLineVec[ iPoLine ];
992 L._segments.resize( L._lEdges.size() - 1 );
993 for ( size_t i = 1; i < L._lEdges.size(); ++i )
995 _Segment & S = L._segments[i-1];
996 S._uv[0] = & L._lEdges[i-1]._uvIn;
997 S._uv[1] = & L._lEdges[i ]._uvIn;
998 S._indexInLine = i-1;
999 if ( maxLen2dTo3dRatio < L._lEdges[i]._len2dTo3dRatio )
1000 maxLen2dTo3dRatio = L._lEdges[i]._len2dTo3dRatio;
1002 // // connect _PolyLine's with segments, the 1st _LayerEdge of every _PolyLine
1003 // // becomes not connected to any segment
1004 // if ( L._leftLine->_advancable )
1005 // L._segments[0]._uv[0] = & L._leftLine->_lEdges.back()._uvIn;
1007 L._segTree.reset( new _SegmentTree( L._segments ));
1010 // Evaluate max possible _thickness if required layers thickness seems too high
1011 // ----------------------------------------------------------------------------
1013 _maxThickness = _hyps[0]->GetTotalThickness();
1014 for ( size_t iH = 1; iH < _hyps.size(); ++iH )
1015 _maxThickness = Max( _maxThickness, _hyps[iH]->GetTotalThickness() );
1017 _SegmentTree::box_type faceBndBox2D;
1018 for ( iPoLine = 0; iPoLine < _polyLineVec.size(); ++iPoLine )
1019 faceBndBox2D.Add( *_polyLineVec[ iPoLine]._segTree->getBox() );
1020 const double boxTol = 1e-3 * sqrt( faceBndBox2D.SquareExtent() );
1022 if ( _maxThickness * maxLen2dTo3dRatio > sqrt( faceBndBox2D.SquareExtent() ) / 10 )
1024 vector< const _Segment* > foundSegs;
1025 double maxPossibleThick = 0;
1026 _SegmentIntersection intersection;
1027 for ( size_t iL1 = 0; iL1 < _polyLineVec.size(); ++iL1 )
1029 _PolyLine& L1 = _polyLineVec[ iL1 ];
1030 _SegmentTree::box_type boxL1 = * L1._segTree->getBox();
1031 boxL1.Enlarge( boxTol );
1032 // consider case of a circle as well!
1033 for ( size_t iL2 = iL1; iL2 < _polyLineVec.size(); ++iL2 )
1035 _PolyLine& L2 = _polyLineVec[ iL2 ];
1036 _SegmentTree::box_type boxL2 = * L2._segTree->getBox();
1037 boxL2.Enlarge( boxTol );
1038 if ( boxL1.IsOut( boxL2 ))
1040 for ( size_t iLE = 1; iLE < L1._lEdges.size(); ++iLE )
1043 L2._segTree->GetSegmentsNear( L1._lEdges[iLE]._ray, foundSegs );
1044 for ( size_t i = 0; i < foundSegs.size(); ++i )
1045 if ( intersection.Compute( *foundSegs[i], L1._lEdges[iLE]._ray ))
1047 double distToL2 = intersection._param2 / L1._lEdges[iLE]._len2dTo3dRatio;
1048 double psblThick = distToL2 / ( 1 + L1._advancable + L2._advancable );
1049 maxPossibleThick = Max( psblThick, maxPossibleThick );
1054 if ( maxPossibleThick > 0. )
1055 _maxThickness = Min( _maxThickness, maxPossibleThick );
1058 // Adjust _LayerEdge's at _PolyLine's extremities
1059 // -----------------------------------------------
1061 for ( iPoLine = 0; iPoLine < _polyLineVec.size(); ++iPoLine )
1063 _PolyLine& LL = _polyLineVec[ iPoLine ];
1064 _PolyLine& LR = *LL._rightLine;
1065 adjustCommonEdge( LL, LR );
1067 // recreate _segments if some _LayerEdge's have been removed by adjustCommonEdge()
1068 for ( iPoLine = 0; iPoLine < _polyLineVec.size(); ++iPoLine )
1070 _PolyLine& L = _polyLineVec[ iPoLine ];
1071 // if ( L._segments.size() == L._lEdges.size() - 1 )
1073 L._segments.resize( L._lEdges.size() - 1 );
1074 for ( size_t i = 1; i < L._lEdges.size(); ++i )
1076 _Segment & S = L._segments[i-1];
1077 S._uv[0] = & L._lEdges[i-1]._uvIn;
1078 S._uv[1] = & L._lEdges[i ]._uvIn;
1079 S._indexInLine = i-1;
1081 L._segTree.reset( new _SegmentTree( L._segments ));
1083 // connect _PolyLine's with segments, the 1st _LayerEdge of every _PolyLine
1084 // becomes not connected to any segment
1085 for ( iPoLine = 0; iPoLine < _polyLineVec.size(); ++iPoLine )
1087 _PolyLine& L = _polyLineVec[ iPoLine ];
1088 if ( L._leftLine->_advancable )
1089 L._segments[0]._uv[0] = & L._leftLine->_lEdges.back()._uvIn;
1092 // Fill _reachableLines.
1093 // ----------------------
1095 // compute bnd boxes taking into account the layers total thickness
1096 vector< _SegmentTree::box_type > lineBoxes( _polyLineVec.size() );
1097 for ( iPoLine = 0; iPoLine < _polyLineVec.size(); ++iPoLine )
1099 lineBoxes[ iPoLine ] = *_polyLineVec[ iPoLine ]._segTree->getBox();
1100 lineBoxes[ iPoLine ].Enlarge( maxLen2dTo3dRatio * getLineThickness( iPoLine ) *
1101 ( _polyLineVec[ iPoLine ]._advancable ? 2. : 1.2 ));
1104 for ( iPoLine = 0; iPoLine < _polyLineVec.size(); ++iPoLine )
1106 _PolyLine& L1 = _polyLineVec[ iPoLine ];
1107 const double thick1 = getLineThickness( iPoLine );
1108 for ( size_t iL2 = 0; iL2 < _polyLineVec.size(); ++iL2 )
1110 _PolyLine& L2 = _polyLineVec[ iL2 ];
1111 if ( iPoLine == iL2 || lineBoxes[ iPoLine ].IsOut( lineBoxes[ iL2 ]))
1113 if ( !L1._advancable && ( L1._leftLine == &L2 || L1._rightLine == &L2 ))
1115 // check reachability by _LayerEdge's
1116 int iDelta = 1; //Max( 1, L1._lEdges.size() / 100 );
1117 for ( size_t iLE = 1; iLE < L1._lEdges.size(); iLE += iDelta )
1119 _LayerEdge& LE = L1._lEdges[iLE];
1120 if ( !lineBoxes[ iL2 ].IsOut ( LE._uvOut,
1121 LE._uvOut + LE._normal2D * thick1 * LE._len2dTo3dRatio ))
1123 L1._reachableLines.push_back( & L2 );
1128 // add self to _reachableLines
1129 Geom2dAdaptor_Curve pcurve( L1._wire->Curve2d( L1._edgeInd ));
1130 L1._isStraight2D = ( pcurve.GetType() == GeomAbs_Line );
1131 if ( !L1._isStraight2D )
1133 // TODO: check carefully
1134 L1._reachableLines.push_back( & L1 );
1141 //================================================================================
1143 * \brief adjust common _LayerEdge of two adjacent _PolyLine's
1144 * \param LL - left _PolyLine
1145 * \param LR - right _PolyLine
1147 //================================================================================
1149 void _ViscousBuilder2D::adjustCommonEdge( _PolyLine& LL, _PolyLine& LR )
1151 int nbAdvancableL = LL._advancable + LR._advancable;
1152 if ( nbAdvancableL == 0 )
1155 _LayerEdge& EL = LL._lEdges.back();
1156 _LayerEdge& ER = LR._lEdges.front();
1157 gp_XY normL = EL._normal2D;
1158 gp_XY normR = ER._normal2D;
1159 gp_XY tangL ( normL.Y(), -normL.X() );
1161 // set common direction to a VERTEX _LayerEdge shared by two _PolyLine's
1162 gp_XY normCommon = ( normL * int( LL._advancable ) +
1163 normR * int( LR._advancable )).Normalized();
1164 EL._normal2D = normCommon;
1165 EL._ray.SetLocation ( EL._uvOut );
1166 EL._ray.SetDirection( EL._normal2D );
1167 if ( nbAdvancableL == 1 ) { // _normal2D is true normal (not average)
1168 EL._isBlocked = true; // prevent intersecting with _Segments of _advancable line
1171 // update _LayerEdge::_len2dTo3dRatio according to a new direction
1172 const vector<UVPtStruct>& points = LL._wire->GetUVPtStruct();
1173 setLenRatio( EL, SMESH_TNodeXYZ( points[ LL._lastPntInd ].node ));
1177 const double dotNormTang = normR * tangL;
1178 const bool largeAngle = Abs( dotNormTang ) > 0.2;
1179 if ( largeAngle ) // not 180 degrees
1181 // recompute _len2dTo3dRatio to take into account angle between EDGEs
1182 gp_Vec2d oldNorm( LL._advancable ? normL : normR );
1183 double angleFactor = 1. / Max( 0.3, Cos( oldNorm.Angle( normCommon )));
1184 EL._len2dTo3dRatio *= angleFactor;
1185 ER._len2dTo3dRatio = EL._len2dTo3dRatio;
1187 gp_XY normAvg = ( normL + normR ).Normalized(); // average normal at VERTEX
1189 if ( dotNormTang < 0. ) // ---------------------------- CONVEX ANGLE
1191 // Remove _LayerEdge's intersecting the normAvg to avoid collisions
1192 // during inflate().
1194 // find max length of the VERTEX-based _LayerEdge whose direction is normAvg
1195 double maxLen2D = _maxThickness * EL._len2dTo3dRatio;
1196 const gp_XY& pCommOut = ER._uvOut;
1197 gp_XY pCommIn = pCommOut + normAvg * maxLen2D;
1198 _Segment segCommon( pCommOut, pCommIn );
1199 _SegmentIntersection intersection;
1200 vector< const _Segment* > foundSegs;
1201 for ( size_t iL1 = 0; iL1 < _polyLineVec.size(); ++iL1 )
1203 _PolyLine& L1 = _polyLineVec[ iL1 ];
1204 const _SegmentTree::box_type* boxL1 = L1._segTree->getBox();
1205 if ( boxL1->IsOut ( pCommOut, pCommIn ))
1207 for ( size_t iLE = 1; iLE < L1._lEdges.size(); ++iLE )
1210 L1._segTree->GetSegmentsNear( segCommon, foundSegs );
1211 for ( size_t i = 0; i < foundSegs.size(); ++i )
1212 if ( intersection.Compute( *foundSegs[i], segCommon ) &&
1213 intersection._param2 > 1e-10 )
1215 double len2D = intersection._param2 * maxLen2D / ( 2 + L1._advancable );
1216 if ( len2D < maxLen2D ) {
1218 pCommIn = pCommOut + normAvg * maxLen2D; // here length of segCommon changes
1224 // remove _LayerEdge's intersecting segCommon
1225 for ( int isR = 0; isR < 2; ++isR ) // loop on [ LL, LR ]
1227 _PolyLine& L = isR ? LR : LL;
1228 _PolyLine::TEdgeIterator eIt = isR ? L._lEdges.begin()+1 : L._lEdges.end()-2;
1229 int dIt = isR ? +1 : -1;
1230 if ( nbAdvancableL == 1 && L._advancable && normL * normR > -0.01 )
1231 continue; // obtuse internal angle
1232 // at least 3 _LayerEdge's should remain in a _PolyLine
1233 if ( L._lEdges.size() < 4 ) continue;
1235 _SegmentIntersection lastIntersection;
1236 for ( ; iLE < L._lEdges.size(); ++iLE, eIt += dIt )
1238 gp_XY uvIn = eIt->_uvOut + eIt->_normal2D * _maxThickness * eIt->_len2dTo3dRatio;
1239 _Segment segOfEdge( eIt->_uvOut, uvIn );
1240 if ( !intersection.Compute( segCommon, segOfEdge ))
1242 lastIntersection._param1 = intersection._param1;
1243 lastIntersection._param2 = intersection._param2;
1245 if ( iLE >= L._lEdges.size() - 1 )
1247 // all _LayerEdge's intersect the segCommon, limit inflation
1248 // of remaining 3 _LayerEdge's
1249 vector< _LayerEdge > newEdgeVec( Min( 3, L._lEdges.size() ));
1250 newEdgeVec.front() = L._lEdges.front();
1251 newEdgeVec.back() = L._lEdges.back();
1252 if ( newEdgeVec.size() == 3 )
1254 newEdgeVec[1] = L._lEdges[ isR ? (L._lEdges.size() - 2) : 1 ];
1255 newEdgeVec[1]._len2dTo3dRatio *= lastIntersection._param2;
1257 L._lEdges.swap( newEdgeVec );
1258 if ( !isR ) std::swap( lastIntersection._param1 , lastIntersection._param2 );
1259 L._lEdges.front()._len2dTo3dRatio *= lastIntersection._param1; // ??
1260 L._lEdges.back ()._len2dTo3dRatio *= lastIntersection._param2;
1262 else if ( iLE != 1 )
1264 // eIt points to the _LayerEdge not intersecting with segCommon
1266 LR._lEdges.erase( LR._lEdges.begin()+1, eIt );
1268 LL._lEdges.erase( eIt+1, --LL._lEdges.end() );
1269 // eIt = isR ? L._lEdges.begin()+1 : L._lEdges.end()-2;
1270 // for ( size_t i = 1; i < iLE; ++i, eIt += dIt )
1271 // eIt->_isBlocked = true;
1275 else // ------------------------------------------ CONCAVE ANGLE
1277 if ( nbAdvancableL == 1 )
1279 // make that the _LayerEdge at VERTEX is not shared by LL and LR:
1280 // different normals is a sign that they are not shared
1281 _LayerEdge& notSharedEdge = LL._advancable ? LR._lEdges[0] : LL._lEdges.back();
1282 _LayerEdge& sharedEdge = LR._advancable ? LR._lEdges[0] : LL._lEdges.back();
1284 notSharedEdge._normal2D.SetCoord( 0.,0. );
1285 sharedEdge._normal2D = normAvg;
1286 sharedEdge._isBlocked = false;
1287 notSharedEdge._isBlocked = true;
1293 //================================================================================
1295 * \brief initialize data of a _LayerEdge
1297 //================================================================================
1299 void _ViscousBuilder2D::setLayerEdgeData( _LayerEdge& lEdge,
1301 Handle(Geom2d_Curve)& pcurve,
1302 Handle(Geom_Curve)& curve,
1305 GeomAPI_ProjectPointOnSurf* faceProj)
1308 if ( faceProj && !curve.IsNull() )
1310 uv = pcurve->Value( u );
1311 gp_Vec tangent; gp_Pnt p; gp_Vec du, dv;
1312 curve->D1( u, p, tangent );
1315 _surface->D1( uv.X(), uv.Y(), p, du, dv );
1316 gp_Vec faceNorm = du ^ dv;
1317 gp_Vec normal = faceNorm ^ tangent;
1319 p = pOut.XYZ() + normal.XYZ() * /*1e-2 * */_hyps[0]->GetTotalThickness() / _hyps[0]->GetNumberLayers();
1320 faceProj->Perform( p );
1321 if ( !faceProj->IsDone() || faceProj->NbPoints() < 1 )
1322 return setLayerEdgeData( lEdge, u, pcurve, curve, p, reverse, NULL );
1324 faceProj->LowerDistanceParameters(U,V);
1325 lEdge._normal2D.SetCoord( U - uv.X(), V - uv.Y() );
1326 lEdge._normal2D.Normalize();
1331 pcurve->D1( u, uv, tangent );
1332 tangent.Normalize();
1335 lEdge._normal2D.SetCoord( -tangent.Y(), tangent.X() );
1337 lEdge._uvOut = lEdge._uvIn = uv.XY();
1338 lEdge._ray.SetLocation ( lEdge._uvOut );
1339 lEdge._ray.SetDirection( lEdge._normal2D );
1340 lEdge._isBlocked = false;
1341 lEdge._length2D = 0;
1343 lEdge._ID = _nbLE++;
1347 //================================================================================
1349 * \brief Compute and set _LayerEdge::_len2dTo3dRatio
1351 //================================================================================
1353 void _ViscousBuilder2D::setLenRatio( _LayerEdge& LE, const gp_Pnt& pOut )
1355 const double probeLen2d = 1e-3;
1357 gp_Pnt2d p2d = LE._uvOut + LE._normal2D * probeLen2d;
1358 gp_Pnt p3d = _surface->Value( p2d.X(), p2d.Y() );
1359 double len3d = p3d.Distance( pOut );
1360 if ( len3d < std::numeric_limits<double>::min() )
1361 LE._len2dTo3dRatio = std::numeric_limits<double>::min();
1363 LE._len2dTo3dRatio = probeLen2d / len3d;
1366 //================================================================================
1368 * \brief Increase length of _LayerEdge's to reach the required thickness of layers
1370 //================================================================================
1372 bool _ViscousBuilder2D::inflate()
1374 // Limit size of inflation step by geometry size found by
1375 // itersecting _LayerEdge's with _Segment's
1376 double minSize = _maxThickness, maxSize = 0;
1377 vector< const _Segment* > foundSegs;
1378 _SegmentIntersection intersection;
1379 for ( size_t iL1 = 0; iL1 < _polyLineVec.size(); ++iL1 )
1381 _PolyLine& L1 = _polyLineVec[ iL1 ];
1382 for ( size_t iL2 = 0; iL2 < L1._reachableLines.size(); ++iL2 )
1384 _PolyLine& L2 = * L1._reachableLines[ iL2 ];
1385 for ( size_t iLE = 1; iLE < L1._lEdges.size(); ++iLE )
1388 L2._segTree->GetSegmentsNear( L1._lEdges[iLE]._ray, foundSegs );
1389 for ( size_t i = 0; i < foundSegs.size(); ++i )
1390 if ( ! L1.IsAdjacent( *foundSegs[i], & L1._lEdges[iLE] ) &&
1391 intersection.Compute( *foundSegs[i], L1._lEdges[iLE]._ray ))
1393 double distToL2 = intersection._param2 / L1._lEdges[iLE]._len2dTo3dRatio;
1394 double size = distToL2 / ( 1 + L1._advancable + L2._advancable );
1395 if ( 1e-10 < size && size < minSize )
1397 if ( size > maxSize )
1403 if ( minSize > maxSize ) // no collisions possible
1404 maxSize = _maxThickness;
1406 cout << "-- minSize = " << minSize << ", maxSize = " << maxSize << endl;
1409 double curThick = 0, stepSize = minSize;
1411 if ( maxSize > _maxThickness )
1412 maxSize = _maxThickness;
1413 while ( curThick < maxSize )
1415 curThick += stepSize * 1.25;
1416 if ( curThick > _maxThickness )
1417 curThick = _maxThickness;
1419 // Elongate _LayerEdge's
1420 for ( size_t iL = 0; iL < _polyLineVec.size(); ++iL )
1422 _PolyLine& L = _polyLineVec[ iL ];
1423 if ( !L._advancable ) continue;
1424 const double lineThick = Min( curThick, getLineThickness( iL ));
1425 bool lenChange = false;
1426 for ( size_t iLE = L.FirstLEdge(); iLE < L._lEdges.size(); ++iLE )
1427 lenChange |= L._lEdges[iLE].SetNewLength( lineThick );
1428 // for ( int k=0; k<L._segments.size(); ++k)
1429 // cout << "( " << L._segments[k].p1().X() << ", " <<L._segments[k].p1().Y() << " ) "
1430 // << "( " << L._segments[k].p2().X() << ", " <<L._segments[k].p2().Y() << " ) "
1433 L._segTree.reset( new _SegmentTree( L._segments ));
1436 // Avoid intersection of _Segment's
1437 bool allBlocked = fixCollisions();
1440 break; // no more inflating possible
1442 stepSize = Max( stepSize , _maxThickness / 10. );
1446 // if (nbSteps == 0 )
1447 // return error("failed at the very first inflation step");
1450 // remove _LayerEdge's of one line intersecting with each other
1451 for ( size_t iL = 0; iL < _polyLineVec.size(); ++iL )
1453 _PolyLine& L = _polyLineVec[ iL ];
1454 if ( !L._advancable ) continue;
1456 // replace an inactive (1st) _LayerEdge with an active one of a neighbour _PolyLine
1457 if ( /*!L._leftLine->_advancable &&*/ L.IsCommonEdgeShared( *L._leftLine ) ) {
1458 L._lEdges[0] = L._leftLine->_lEdges.back();
1460 if ( !L._rightLine->_advancable && L.IsCommonEdgeShared( *L._rightLine ) ) {
1461 L._lEdges.back() = L._rightLine->_lEdges[0];
1464 _SegmentIntersection intersection;
1465 for ( int isR = 0; ( isR < 2 && L._lEdges.size() > 2 ); ++isR )
1467 int nbRemove = 0, deltaIt = isR ? -1 : +1;
1468 _PolyLine::TEdgeIterator eIt = isR ? L._lEdges.end()-1 : L._lEdges.begin();
1469 if ( eIt->_length2D == 0 ) continue;
1470 _Segment seg1( eIt->_uvOut, eIt->_uvIn );
1471 for ( eIt += deltaIt; nbRemove < (int)L._lEdges.size()-1; eIt += deltaIt )
1473 _Segment seg2( eIt->_uvOut, eIt->_uvIn );
1474 if ( !intersection.Compute( seg1, seg2 ))
1478 if ( nbRemove > 0 ) {
1479 if ( nbRemove == (int)L._lEdges.size()-1 ) // 1st and last _LayerEdge's intersect
1482 _LayerEdge& L0 = L._lEdges.front();
1483 _LayerEdge& L1 = L._lEdges.back();
1484 L0._length2D *= intersection._param1 * 0.5;
1485 L1._length2D *= intersection._param2 * 0.5;
1486 L0._uvIn = L0._uvOut + L0._normal2D * L0._length2D;
1487 L1._uvIn = L1._uvOut + L1._normal2D * L1._length2D;
1488 if ( L.IsCommonEdgeShared( *L._leftLine ))
1489 L._leftLine->_lEdges.back() = L0;
1492 L._lEdges.erase( L._lEdges.end()-nbRemove-1,
1493 L._lEdges.end()-nbRemove );
1495 L._lEdges.erase( L._lEdges.begin()+1,
1496 L._lEdges.begin()+1+nbRemove );
1503 //================================================================================
1505 * \brief Remove intersection of _PolyLine's
1507 //================================================================================
1509 bool _ViscousBuilder2D::fixCollisions()
1511 // look for intersections of _Segment's by intersecting _LayerEdge's with
1513 vector< const _Segment* > foundSegs;
1514 _SegmentIntersection intersection;
1516 list< pair< _LayerEdge*, double > > edgeLenLimitList;
1517 list< _LayerEdge* > blockedEdgesList;
1519 for ( size_t iL1 = 0; iL1 < _polyLineVec.size(); ++iL1 )
1521 _PolyLine& L1 = _polyLineVec[ iL1 ];
1522 //if ( !L1._advancable ) continue;
1523 for ( size_t iL2 = 0; iL2 < L1._reachableLines.size(); ++iL2 )
1525 _PolyLine& L2 = * L1._reachableLines[ iL2 ];
1526 for ( size_t iLE = L1.FirstLEdge(); iLE < L1._lEdges.size(); ++iLE )
1528 _LayerEdge& LE1 = L1._lEdges[iLE];
1529 if ( LE1._isBlocked ) continue;
1531 L2._segTree->GetSegmentsNear( LE1._ray, foundSegs );
1532 for ( size_t i = 0; i < foundSegs.size(); ++i )
1534 if ( ! L1.IsAdjacent( *foundSegs[i], &LE1 ) &&
1535 intersection.Compute( *foundSegs[i], LE1._ray ))
1537 const double dist2DToL2 = intersection._param2;
1538 double newLen2D = dist2DToL2 / 2;
1539 if ( newLen2D < 1.1 * LE1._length2D ) // collision!
1541 if ( newLen2D > 0 || !L1._advancable )
1543 blockedEdgesList.push_back( &LE1 );
1544 if ( L1._advancable && newLen2D > 0 )
1546 edgeLenLimitList.push_back( make_pair( &LE1, newLen2D ));
1547 blockedEdgesList.push_back( &L2._lEdges[ foundSegs[i]->_indexInLine ]);
1548 blockedEdgesList.push_back( &L2._lEdges[ foundSegs[i]->_indexInLine + 1 ]);
1550 else // here dist2DToL2 < 0 and LE1._length2D == 0
1552 _LayerEdge* LE2[2] = { & L2._lEdges[ foundSegs[i]->_indexInLine ],
1553 & L2._lEdges[ foundSegs[i]->_indexInLine + 1 ] };
1554 _Segment outSeg2( LE2[0]->_uvOut, LE2[1]->_uvOut );
1555 intersection.Compute( outSeg2, LE1._ray );
1556 newLen2D = intersection._param2 / 2;
1559 edgeLenLimitList.push_back( make_pair( LE2[0], newLen2D ));
1560 edgeLenLimitList.push_back( make_pair( LE2[1], newLen2D ));
1571 // limit length of _LayerEdge's that are extrema of _PolyLine's
1572 // to avoid intersection of these _LayerEdge's
1573 for ( size_t iL1 = 0; iL1 < _polyLineVec.size(); ++iL1 )
1575 _PolyLine& L = _polyLineVec[ iL1 ];
1576 if ( L._lEdges.size() < 4 ) // all intermediate _LayerEdge's intersect with extremum ones
1578 _LayerEdge& LEL = L._leftLine->_lEdges.back();
1579 _LayerEdge& LER = L._lEdges.back();
1580 _Segment segL( LEL._uvOut, LEL._uvIn );
1581 _Segment segR( LER._uvOut, LER._uvIn );
1582 double newLen2DL, newLen2DR;
1583 if ( intersection.Compute( segL, LER._ray ))
1585 newLen2DR = intersection._param2 / 2;
1586 newLen2DL = LEL._length2D * intersection._param1 / 2;
1588 else if ( intersection.Compute( segR, LEL._ray ))
1590 newLen2DL = intersection._param2 / 2;
1591 newLen2DR = LER._length2D * intersection._param1 / 2;
1597 if ( newLen2DL > 0 && newLen2DR > 0 )
1599 if ( newLen2DL < 1.1 * LEL._length2D )
1600 edgeLenLimitList.push_back( make_pair( &LEL, newLen2DL ));
1601 if ( newLen2DR < 1.1 * LER._length2D )
1602 edgeLenLimitList.push_back( make_pair( &LER, newLen2DR ));
1607 // set limited length to _LayerEdge's
1608 list< pair< _LayerEdge*, double > >::iterator edge2Len = edgeLenLimitList.begin();
1609 for ( ; edge2Len != edgeLenLimitList.end(); ++edge2Len )
1611 _LayerEdge* LE = edge2Len->first;
1612 if ( LE->_length2D > edge2Len->second )
1614 LE->_isBlocked = false;
1615 LE->SetNewLength( edge2Len->second / LE->_len2dTo3dRatio );
1617 LE->_isBlocked = true;
1620 // block inflation of _LayerEdge's
1621 list< _LayerEdge* >::iterator edge = blockedEdgesList.begin();
1622 for ( ; edge != blockedEdgesList.end(); ++edge )
1623 (*edge)->_isBlocked = true;
1625 // find a not blocked _LayerEdge
1626 for ( size_t iL = 0; iL < _polyLineVec.size(); ++iL )
1628 _PolyLine& L = _polyLineVec[ iL ];
1629 if ( !L._advancable ) continue;
1630 for ( size_t iLE = L.FirstLEdge(); iLE < L._lEdges.size(); ++iLE )
1631 if ( !L._lEdges[ iLE ]._isBlocked )
1638 //================================================================================
1640 * \brief Create new edges and shrink edges existing on a non-advancable _PolyLine
1641 * adjacent to an advancable one.
1643 //================================================================================
1645 bool _ViscousBuilder2D::shrink()
1647 gp_Pnt2d uv; //gp_Vec2d tangent;
1648 _SegmentIntersection intersection;
1651 for ( size_t iL1 = 0; iL1 < _polyLineVec.size(); ++iL1 )
1653 _PolyLine& L = _polyLineVec[ iL1 ]; // line with no layers
1654 if ( L._advancable )
1656 const int nbAdvancable = ( L._rightLine->_advancable + L._leftLine->_advancable );
1657 if ( nbAdvancable == 0 )
1660 const TopoDS_Vertex& V1 = L._wire->FirstVertex( L._edgeInd );
1661 const TopoDS_Vertex& V2 = L._wire->LastVertex ( L._edgeInd );
1662 const int v1ID = getMeshDS()->ShapeToIndex( V1 );
1663 const int v2ID = getMeshDS()->ShapeToIndex( V2 );
1664 const bool isShrinkableL = ! _noShrinkVert.count( v1ID ) && L._leftLine->_advancable;
1665 const bool isShrinkableR = ! _noShrinkVert.count( v2ID ) && L._rightLine->_advancable;
1666 if ( !isShrinkableL && !isShrinkableR )
1669 const TopoDS_Edge& E = L._wire->Edge ( L._edgeInd );
1670 const int edgeID = L._wire->EdgeID ( L._edgeInd );
1671 const double edgeLen = L._wire->EdgeLength ( L._edgeInd );
1672 Handle(Geom2d_Curve) pcurve = L._wire->Curve2d ( L._edgeInd );
1673 const bool edgeReversed = ( E.Orientation() == TopAbs_REVERSED );
1675 SMESH_MesherHelper helper( *_mesh ); // to create nodes and edges on E
1676 helper.SetSubShape( E );
1677 helper.SetElementsOnShape( true );
1679 // Check a FACE adjacent to _face by E
1680 bool existingNodesFound = false;
1681 TopoDS_Face adjFace;
1682 PShapeIteratorPtr faceIt = _helper.GetAncestors( E, *_mesh, TopAbs_FACE );
1683 while ( const TopoDS_Shape* f = faceIt->next() )
1684 if ( !_face.IsSame( *f ))
1686 adjFace = TopoDS::Face( *f );
1687 SMESH_ProxyMesh::Ptr pm = _ProxyMeshHolder::FindProxyMeshOfFace( adjFace, *_mesh );
1688 if ( !pm || pm->NbProxySubMeshes() == 0 /*|| !pm->GetProxySubMesh( E )*/)
1690 // There are no viscous layers on an adjacent FACE, clear it's 2D mesh
1691 removeMeshFaces( adjFace );
1692 // if ( removeMeshFaces( adjFace ))
1693 // _clearedFaces.push_back( adjFace ); // to re-compute after all
1697 // There are viscous layers on the adjacent FACE; shrink must be already done;
1701 const vector<UVPtStruct>& points = L._wire->GetUVPtStruct();
1702 int iPFrom = L._firstPntInd, iPTo = L._lastPntInd;
1703 if ( isShrinkableL )
1705 const THypVL* hyp = getLineHypothesis( L._leftLine->_index );
1706 vector<gp_XY>& uvVec = L._lEdges.front()._uvRefined;
1707 for ( int i = 0; i < hyp->GetNumberLayers(); ++i ) {
1708 const UVPtStruct& uvPt = points[ iPFrom + i + 1 ];
1709 L._leftNodes.push_back( uvPt.node );
1710 uvVec.push_back ( pcurve->Value( uvPt.param ).XY() );
1712 iPFrom += hyp->GetNumberLayers();
1714 if ( isShrinkableR )
1716 const THypVL* hyp = getLineHypothesis( L._rightLine->_index );
1717 vector<gp_XY>& uvVec = L._lEdges.back()._uvRefined;
1718 for ( int i = 0; i < hyp->GetNumberLayers(); ++i ) {
1719 const UVPtStruct& uvPt = points[ iPTo - i - 1 ];
1720 L._rightNodes.push_back( uvPt.node );
1721 uvVec.push_back ( pcurve->Value( uvPt.param ).XY() );
1723 iPTo -= hyp->GetNumberLayers();
1725 // make proxy sub-mesh data of present nodes
1727 UVPtStructVec nodeDataVec( & points[ iPFrom ], & points[ iPTo + 1 ]);
1729 double normSize = nodeDataVec.back().normParam - nodeDataVec.front().normParam;
1730 for ( int iP = nodeDataVec.size()-1; iP >= 0 ; --iP )
1731 nodeDataVec[iP].normParam =
1732 ( nodeDataVec[iP].normParam - nodeDataVec[0].normParam ) / normSize;
1734 const SMDS_MeshNode* n = nodeDataVec.front().node;
1735 if ( n->GetPosition()->GetTypeOfPosition() == SMDS_TOP_VERTEX )
1736 nodeDataVec.front().param = L._wire->FirstU( L._edgeInd );
1737 n = nodeDataVec.back().node;
1738 if ( n->GetPosition()->GetTypeOfPosition() == SMDS_TOP_VERTEX )
1739 nodeDataVec.back().param = L._wire->LastU( L._edgeInd );
1741 _ProxyMeshOfFace::_EdgeSubMesh* myEdgeSM = getProxyMesh()->GetEdgeSubMesh( edgeID );
1742 myEdgeSM->SetUVPtStructVec( nodeDataVec );
1744 existingNodesFound = true;
1747 } // loop on FACEs sharing E
1749 // Check if L is an already shrinked seam
1750 if ( adjFace.IsNull() && _helper.IsRealSeam( edgeID ))
1751 if ( L._wire->Edge( L._edgeInd ).Orientation() == TopAbs_FORWARD )
1753 // Commented as a case with a seam EDGE (issue 0052461) is hard to support
1754 // because SMESH_ProxyMesh can't hold different sub-meshes for two
1755 // 2D representations of the seam. But such a case is not a real practice one.
1757 // for ( int iL2 = iL1-1; iL2 > -1; --iL2 )
1759 // _PolyLine& L2 = _polyLineVec[ iL2 ];
1760 // if ( edgeID == L2._wire->EdgeID( L2._edgeInd ))
1762 // // copy layer nodes
1763 // const int seamPar = _helper.GetPeriodicIndex();
1764 // vector<gp_XY>& uvVec = L._lEdges.front()._uvRefined;
1765 // if ( isShrinkableL )
1767 // L._leftNodes = L2._rightNodes;
1768 // uvVec = L2._lEdges.back()._uvRefined;
1770 // if ( isShrinkableR )
1772 // L._rightNodes = L2._leftNodes;
1773 // uvVec = L2._lEdges.front()._uvRefined;
1775 // for ( size_t i = 0; i < uvVec.size(); ++i )
1777 // gp_XY & uv = uvVec[i];
1778 // uv.SetCoord( seamPar, _helper.GetOtherParam( uv.Coord( seamPar )));
1781 // existingNodesFound = true;
1787 if ( existingNodesFound )
1788 continue; // nothing more to do in this case
1790 double u1 = L._wire->FirstU( L._edgeInd ), uf = u1;
1791 double u2 = L._wire->LastU ( L._edgeInd ), ul = u2;
1793 // a ratio to pass 2D <--> 1D
1794 const double len1D = 1e-3;
1795 const double len2D = pcurve->Value(uf).Distance( pcurve->Value(uf+len1D));
1796 double len1dTo2dRatio = len1D / len2D;
1798 // create a vector of proxy nodes
1799 const vector<UVPtStruct>& points = L._wire->GetUVPtStruct();
1800 UVPtStructVec nodeDataVec( & points[ L._firstPntInd ],
1801 & points[ L._lastPntInd + 1 ]);
1802 nodeDataVec.front().param = u1; // U on vertex is correct on only one of shared edges
1803 nodeDataVec.back ().param = u2;
1804 nodeDataVec.front().normParam = 0;
1805 nodeDataVec.back ().normParam = 1;
1807 // Get length of existing segments (from an edge start to a node) and their nodes
1808 vector< double > segLengths( nodeDataVec.size() - 1 );
1809 BRepAdaptor_Curve curve( E );
1810 for ( size_t iP = 1; iP < nodeDataVec.size(); ++iP )
1812 const double len = GCPnts_AbscissaPoint::Length( curve, uf, nodeDataVec[iP].param );
1813 segLengths[ iP-1 ] = len;
1816 // Move first and last parameters on EDGE (U of n1) according to layers' thickness
1817 // and create nodes of layers on EDGE ( -x-x-x )
1821 // x-----x-----x-----x-----
1826 // x-x-x-x-----x-----x----
1829 int isRShrinkedForAdjacent = 0;
1830 UVPtStructVec nodeDataForAdjacent;
1831 for ( int isR = 0; isR < 2; ++isR )
1833 _PolyLine* L2 = isR ? L._rightLine : L._leftLine; // line with layers
1834 if ( !L2->_advancable &&
1835 !toShrinkForAdjacent( adjFace, E, L._wire->FirstVertex( L._edgeInd + isR )))
1837 if ( isR ? !isShrinkableR : !isShrinkableL )
1840 double & u = isR ? u2 : u1; // param to move
1841 double u0 = isR ? ul : uf; // init value of the param to move
1842 int iPEnd = isR ? nodeDataVec.size() - 1 : 0;
1844 _LayerEdge& nearLE = isR ? L._lEdges.back() : L._lEdges.front();
1845 _LayerEdge& farLE = isR ? L._lEdges.front() : L._lEdges.back();
1847 // try to find length of advancement along L by intersecting L with
1848 // an adjacent _Segment of L2
1850 double& length2D = nearLE._length2D;
1851 double length1D = 0;
1852 sign = ( isR ^ edgeReversed ) ? -1. : 1.;
1854 bool isConvex = false;
1855 if ( L2->_advancable )
1857 const uvPtStruct& tang2P1 = points[ isR ? L2->_firstPntInd : L2->_lastPntInd ];
1858 const uvPtStruct& tang2P2 = points[ isR ? L2->_firstPntInd+1 : L2->_lastPntInd-1 ];
1859 gp_XY seg2Dir( tang2P2.u - tang2P1.u,
1860 tang2P2.v - tang2P1.v );
1861 int iFSeg2 = isR ? 0 : L2->_segments.size() - 1;
1862 int iLSeg2 = isR ? 1 : L2->_segments.size() - 2;
1863 gp_XY uvLSeg2In = L2->_lEdges[ iLSeg2 ]._uvIn;
1864 Handle(Geom2d_Line) seg2Line = new Geom2d_Line( uvLSeg2In, seg2Dir );
1866 Geom2dAdaptor_Curve edgeCurve( pcurve, Min( uf, ul ), Max( uf, ul ));
1867 Geom2dAdaptor_Curve seg2Curve( seg2Line );
1868 Geom2dInt_GInter curveInt( edgeCurve, seg2Curve, 1e-7, 1e-7 );
1869 isConvex = ( curveInt.IsDone() && !curveInt.IsEmpty() );
1872 length1D = Abs( u - curveInt.Point( 1 ).ParamOnFirst() );
1873 double maxDist2d = 2 * L2->_lEdges[ iLSeg2 ]._length2D;
1874 isConvex = ( length1D < maxDist2d * len1dTo2dRatio );
1881 if ( !isConvex ) { /* concave VERTEX */ /* o-----o---
1887 length2D = L2->_lEdges[ iFSeg2 ]._length2D;
1888 //if ( L2->_advancable ) continue;
1891 else // L2 is advancable but in the face adjacent by L
1893 length2D = farLE._length2D;
1894 if ( length2D == 0 ) {
1895 _LayerEdge& neighborLE =
1896 ( isR ? L._leftLine->_lEdges.back() : L._rightLine->_lEdges.front() );
1897 length2D = neighborLE._length2D;
1898 if ( length2D == 0 )
1899 length2D = _maxThickness * nearLE._len2dTo3dRatio;
1903 // move u to the internal boundary of layers
1905 // x-x-x-x-----x-----x----
1906 double maxLen3D = Min( _maxThickness, edgeLen / ( 1 + nbAdvancable ));
1907 double maxLen2D = maxLen3D * nearLE._len2dTo3dRatio;
1908 if ( !length2D ) length2D = length1D / len1dTo2dRatio;
1909 if ( Abs( length2D ) > maxLen2D )
1910 length2D = maxLen2D;
1911 nearLE._uvIn = nearLE._uvOut + nearLE._normal2D * length2D;
1913 u += length2D * len1dTo2dRatio * sign;
1914 nodeDataVec[ iPEnd ].param = u;
1916 gp_Pnt2d newUV = pcurve->Value( u );
1917 nodeDataVec[ iPEnd ].u = newUV.X();
1918 nodeDataVec[ iPEnd ].v = newUV.Y();
1920 // compute params of layers on L
1921 vector<double> heights;
1922 const THypVL* hyp = getLineHypothesis( L2->_index );
1923 calcLayersHeight( u - u0, heights, hyp );
1925 vector< double > params( heights.size() );
1926 for ( size_t i = 0; i < params.size(); ++i )
1927 params[ i ] = u0 + heights[ i ];
1929 // create nodes of layers and edges between them
1931 vector< const SMDS_MeshNode* >& layersNode = isR ? L._rightNodes : L._leftNodes;
1932 vector<gp_XY>& nodeUV = ( isR ? L._lEdges.back() : L._lEdges[0] )._uvRefined;
1933 nodeUV.resize ( hyp->GetNumberLayers() );
1934 layersNode.resize( hyp->GetNumberLayers() );
1935 const SMDS_MeshNode* vertexNode = nodeDataVec[ iPEnd ].node;
1936 const SMDS_MeshNode * prevNode = vertexNode;
1937 for ( size_t i = 0; i < params.size(); ++i )
1939 const gp_Pnt p = curve.Value( params[i] );
1940 layersNode[ i ] = helper.AddNode( p.X(), p.Y(), p.Z(), /*id=*/0, params[i] );
1941 nodeUV [ i ] = pcurve->Value( params[i] ).XY();
1942 helper.AddEdge( prevNode, layersNode[ i ] );
1943 prevNode = layersNode[ i ];
1946 // store data of layer nodes made for adjacent FACE
1947 if ( !L2->_advancable )
1949 isRShrinkedForAdjacent = isR;
1950 nodeDataForAdjacent.resize( hyp->GetNumberLayers() );
1952 size_t iFrw = 0, iRev = nodeDataForAdjacent.size()-1, *i = isR ? &iRev : &iFrw;
1953 nodeDataForAdjacent[ *i ] = points[ isR ? L._lastPntInd : L._firstPntInd ];
1954 nodeDataForAdjacent[ *i ].param = u0;
1955 nodeDataForAdjacent[ *i ].normParam = isR;
1956 for ( ++iFrw, --iRev; iFrw < layersNode.size(); ++iFrw, --iRev )
1958 nodeDataForAdjacent[ *i ].node = layersNode[ iFrw - 1 ];
1959 nodeDataForAdjacent[ *i ].u = nodeUV [ iFrw - 1 ].X();
1960 nodeDataForAdjacent[ *i ].v = nodeUV [ iFrw - 1 ].Y();
1961 nodeDataForAdjacent[ *i ].param = params [ iFrw - 1 ];
1964 // replace a node on vertex by a node of last (most internal) layer
1965 // in a segment on E
1966 SMDS_ElemIteratorPtr segIt = vertexNode->GetInverseElementIterator( SMDSAbs_Edge );
1967 const SMDS_MeshNode* segNodes[3];
1968 while ( segIt->more() )
1970 const SMDS_MeshElement* segment = segIt->next();
1971 if ( segment->getshapeId() != edgeID ) continue;
1973 const int nbNodes = segment->NbNodes();
1974 for ( int i = 0; i < nbNodes; ++i )
1976 const SMDS_MeshNode* n = segment->GetNode( i );
1977 segNodes[ i ] = ( n == vertexNode ? layersNode.back() : n );
1979 getMeshDS()->ChangeElementNodes( segment, segNodes, nbNodes );
1982 nodeDataVec[ iPEnd ].node = layersNode.back();
1984 } // loop on the extremities of L
1986 // Shrink edges to fit in between the layers at EDGE ends
1988 double newLength = GCPnts_AbscissaPoint::Length( curve, u1, u2 );
1989 double lenRatio = newLength / edgeLen * ( edgeReversed ? -1. : 1. );
1990 for ( size_t iP = 1; iP < nodeDataVec.size()-1; ++iP )
1992 const SMDS_MeshNode* oldNode = nodeDataVec[iP].node;
1994 GCPnts_AbscissaPoint discret( curve, segLengths[iP-1] * lenRatio, u1 );
1995 if ( !discret.IsDone() )
1996 throw SALOME_Exception(LOCALIZED("GCPnts_AbscissaPoint failed"));
1998 nodeDataVec[iP].param = discret.Parameter();
1999 if ( oldNode->GetPosition()->GetTypeOfPosition() != SMDS_TOP_EDGE )
2000 throw SALOME_Exception(SMESH_Comment("ViscousBuilder2D: not SMDS_TOP_EDGE node position: ")
2001 << oldNode->GetPosition()->GetTypeOfPosition()
2002 << " of node " << oldNode->GetID());
2003 SMDS_EdgePositionPtr pos = oldNode->GetPosition();
2004 pos->SetUParameter( nodeDataVec[iP].param );
2006 gp_Pnt newP = curve.Value( nodeDataVec[iP].param );
2007 getMeshDS()->MoveNode( oldNode, newP.X(), newP.Y(), newP.Z() );
2009 gp_Pnt2d newUV = pcurve->Value( nodeDataVec[iP].param ).XY();
2010 nodeDataVec[iP].u = newUV.X();
2011 nodeDataVec[iP].v = newUV.Y();
2012 nodeDataVec[iP].normParam = segLengths[iP-1] / edgeLen;
2013 // nodeDataVec[iP].x = segLengths[iP-1] / edgeLen;
2014 // nodeDataVec[iP].y = segLengths[iP-1] / edgeLen;
2017 // Add nodeDataForAdjacent to nodeDataVec
2019 if ( !nodeDataForAdjacent.empty() )
2021 const double par1 = isRShrinkedForAdjacent ? u2 : uf;
2022 const double par2 = isRShrinkedForAdjacent ? ul : u1;
2023 const double shrinkLen = GCPnts_AbscissaPoint::Length( curve, par1, par2 );
2025 // compute new normParam for nodeDataVec
2026 for ( size_t iP = 0; iP < nodeDataVec.size()-1; ++iP )
2027 nodeDataVec[iP+1].normParam = segLengths[iP] / ( edgeLen + shrinkLen );
2028 double normDelta = 1 - nodeDataVec.back().normParam;
2029 if ( !isRShrinkedForAdjacent )
2030 for ( size_t iP = 0; iP < nodeDataVec.size(); ++iP )
2031 nodeDataVec[iP].normParam += normDelta;
2033 // compute new normParam for nodeDataForAdjacent
2034 const double deltaR = isRShrinkedForAdjacent ? nodeDataVec.back().normParam : 0;
2035 for ( size_t iP = !isRShrinkedForAdjacent; iP < nodeDataForAdjacent.size(); ++iP )
2037 double lenFromPar1 =
2038 GCPnts_AbscissaPoint::Length( curve, par1, nodeDataForAdjacent[iP].param );
2039 nodeDataForAdjacent[iP].normParam = deltaR + normDelta * lenFromPar1 / shrinkLen;
2041 // concatenate nodeDataVec and nodeDataForAdjacent
2042 nodeDataVec.insert(( isRShrinkedForAdjacent ? nodeDataVec.end() : nodeDataVec.begin() ),
2043 nodeDataForAdjacent.begin(), nodeDataForAdjacent.end() );
2046 // Extend nodeDataVec by a node located at the end of not shared _LayerEdge
2047 /* n - to add to nodeDataVec
2056 for ( int isR = 0; isR < 2; ++isR )
2058 _PolyLine& L2 = *( isR ? L._rightLine : L._leftLine ); // line with layers
2059 if ( ! L2._advancable || L.IsCommonEdgeShared( L2 ) )
2061 vector< const SMDS_MeshNode* >& layerNodes2 = isR ? L2._leftNodes : L2._rightNodes;
2062 _LayerEdge& LE2 = isR ? L2._lEdges.front() : L2._lEdges.back();
2063 if ( layerNodes2.empty() )
2065 // refine the not shared _LayerEdge
2066 vector<double> layersHeight;
2067 calcLayersHeight( LE2._length2D, layersHeight, getLineHypothesis( L2._index ));
2069 vector<gp_XY>& nodeUV2 = LE2._uvRefined;
2070 nodeUV2.resize ( layersHeight.size() );
2071 layerNodes2.resize( layersHeight.size() );
2072 for ( size_t i = 0; i < layersHeight.size(); ++i )
2074 gp_XY uv = LE2._uvOut + LE2._normal2D * layersHeight[i];
2075 gp_Pnt p = _surface->Value( uv.X(), uv.Y() );
2077 layerNodes2[ i ] = _helper.AddNode( p.X(), p.Y(), p.Z(), /*id=*/0, uv.X(), uv.Y() );
2080 UVPtStruct ptOfNode;
2081 ptOfNode.u = LE2._uvRefined.back().X();
2082 ptOfNode.v = LE2._uvRefined.back().Y();
2083 ptOfNode.node = layerNodes2.back();
2084 ptOfNode.param = isR ? ul : uf;
2085 ptOfNode.normParam = isR ? 1 : 0;
2087 nodeDataVec.insert(( isR ? nodeDataVec.end() : nodeDataVec.begin() ), ptOfNode );
2089 // recompute normParam of nodes in nodeDataVec
2090 newLength = GCPnts_AbscissaPoint::Length( curve,
2091 nodeDataVec.front().param,
2092 nodeDataVec.back().param);
2093 for ( size_t iP = 1; iP < nodeDataVec.size(); ++iP )
2095 const double len = GCPnts_AbscissaPoint::Length( curve,
2096 nodeDataVec.front().param,
2097 nodeDataVec[iP].param );
2098 nodeDataVec[iP].normParam = len / newLength;
2102 // create a proxy sub-mesh containing the moved nodes
2103 _ProxyMeshOfFace::_EdgeSubMesh* edgeSM = getProxyMesh()->GetEdgeSubMesh( edgeID );
2104 edgeSM->SetUVPtStructVec( nodeDataVec );
2106 // set a sub-mesh event listener to remove just created edges when
2107 // "ViscousLayers2D" hypothesis is modified
2108 VISCOUS_3D::ToClearSubWithMain( _mesh->GetSubMesh( E ), _face );
2110 } // loop on _polyLineVec
2115 //================================================================================
2117 * \brief Returns true if there will be a shrinked mesh on EDGE E of FACE adjFace
2120 //================================================================================
2122 bool _ViscousBuilder2D::toShrinkForAdjacent( const TopoDS_Face& adjFace,
2123 const TopoDS_Edge& E,
2124 const TopoDS_Vertex& V)
2126 if ( _noShrinkVert.count( getMeshDS()->ShapeToIndex( V )) || adjFace.IsNull() )
2129 vector< const StdMeshers_ViscousLayers2D* > hyps;
2130 vector< TopoDS_Shape > hypShapes;
2131 if ( VISCOUS_2D::findHyps( *_mesh, adjFace, hyps, hypShapes ))
2133 VISCOUS_2D::_ViscousBuilder2D builder( *_mesh, adjFace, hyps, hypShapes );
2134 builder._faceSideVec = StdMeshers_FaceSide::GetFaceWires( adjFace, *_mesh, true, _error );
2135 builder.findEdgesWithLayers();
2137 PShapeIteratorPtr edgeIt = _helper.GetAncestors( V, *_mesh, TopAbs_EDGE );
2138 while ( const TopoDS_Shape* edgeAtV = edgeIt->next() )
2140 if ( !edgeAtV->IsSame( E ) &&
2141 _helper.IsSubShape( *edgeAtV, adjFace ) &&
2142 !builder._ignoreShapeIds.count( getMeshDS()->ShapeToIndex( *edgeAtV )))
2151 //================================================================================
2155 //================================================================================
2157 bool _ViscousBuilder2D::refine()
2159 // find out orientation of faces to create
2161 ( _helper.GetSubShapeOri( _mesh->GetShapeToMesh(), _face ) == TopAbs_REVERSED );
2163 // store a proxyMesh in a sub-mesh
2164 // make faces on each _PolyLine
2165 vector< double > layersHeight;
2166 //double prevLen2D = -1;
2167 for ( size_t iL = 0; iL < _polyLineVec.size(); ++iL )
2169 _PolyLine& L = _polyLineVec[ iL ];
2170 if ( !L._advancable ) continue;
2172 // replace an inactive (1st) _LayerEdge with an active one of a neighbour _PolyLine
2173 //size_t iLE = 0, nbLE = L._lEdges.size();
2174 const bool leftEdgeShared = L.IsCommonEdgeShared( *L._leftLine );
2175 const bool rightEdgeShared = L.IsCommonEdgeShared( *L._rightLine );
2176 if ( /*!L._leftLine->_advancable &&*/ leftEdgeShared )
2178 L._lEdges[0] = L._leftLine->_lEdges.back();
2179 //iLE += int( !L._leftLine->_advancable );
2181 if ( !L._rightLine->_advancable && rightEdgeShared )
2183 L._lEdges.back() = L._rightLine->_lEdges[0];
2187 // limit length of neighbour _LayerEdge's to avoid sharp change of layers thickness
2189 vector< double > segLen( L._lEdges.size() );
2192 // check if length modification is useful: look for _LayerEdge's
2193 // with length limited due to collisions
2194 bool lenLimited = false;
2195 for ( size_t iLE = 1; ( iLE < L._lEdges.size()-1 && !lenLimited ); ++iLE )
2196 lenLimited = L._lEdges[ iLE ]._isBlocked;
2200 for ( size_t i = 1; i < segLen.size(); ++i )
2202 // accumulate length of segments
2203 double sLen = (L._lEdges[i-1]._uvOut - L._lEdges[i]._uvOut ).Modulus();
2204 segLen[i] = segLen[i-1] + sLen;
2206 const double totSegLen = segLen.back();
2207 // normalize the accumulated length
2208 for ( size_t iS = 1; iS < segLen.size(); ++iS )
2209 segLen[iS] /= totSegLen;
2211 for ( int isR = 0; isR < 2; ++isR )
2213 size_t iF = 0, iL = L._lEdges.size()-1;
2214 size_t *i = isR ? &iL : &iF;
2215 _LayerEdge* prevLE = & L._lEdges[ *i ];
2217 for ( ++iF, --iL; iF < L._lEdges.size()-1; ++iF, --iL )
2219 _LayerEdge& LE = L._lEdges[*i];
2220 if ( prevLE->_length2D > 0 )
2222 gp_XY tangent ( LE._normal2D.Y(), -LE._normal2D.X() );
2223 weight += Abs( tangent * ( prevLE->_uvIn - LE._uvIn )) / totSegLen;
2224 // gp_XY prevTang( LE._uvOut - prevLE->_uvOut );
2225 // gp_XY prevNorm( -prevTang.Y(), prevTang.X() );
2226 gp_XY prevNorm = LE._normal2D;
2227 double prevProj = prevNorm * ( prevLE->_uvIn - prevLE->_uvOut );
2228 if ( prevProj > 0 ) {
2229 prevProj /= prevNorm.Modulus();
2230 if ( LE._length2D < prevProj )
2231 weight += 0.75 * ( 1 - weight ); // length decrease is more preferable
2232 LE._length2D = weight * LE._length2D + ( 1 - weight ) * prevProj;
2233 LE._uvIn = LE._uvOut + LE._normal2D * LE._length2D;
2240 // DEBUG: to see _uvRefined. cout can be redirected to hide NETGEN output
2241 // cerr << "import smesh" << endl << "mesh = smesh.Mesh()"<< endl;
2243 const vector<UVPtStruct>& points = L._wire->GetUVPtStruct();
2245 // analyse extremities of the _PolyLine to find existing nodes
2246 const TopoDS_Vertex& V1 = L._wire->FirstVertex( L._edgeInd );
2247 const TopoDS_Vertex& V2 = L._wire->LastVertex ( L._edgeInd );
2248 const int v1ID = getMeshDS()->ShapeToIndex( V1 );
2249 const int v2ID = getMeshDS()->ShapeToIndex( V2 );
2250 const bool isShrinkableL = ! _noShrinkVert.count( v1ID );
2251 const bool isShrinkableR = ! _noShrinkVert.count( v2ID );
2253 bool hasLeftNode = ( !L._leftLine->_rightNodes.empty() && leftEdgeShared );
2254 bool hasRightNode = ( !L._rightLine->_leftNodes.empty() && rightEdgeShared );
2255 bool hasOwnLeftNode = ( !L._leftNodes.empty() );
2256 bool hasOwnRightNode = ( !L._rightNodes.empty() );
2257 bool isClosedEdge = ( points[ L._firstPntInd ].node == points[ L._lastPntInd ].node );
2259 nbN = L._lastPntInd - L._firstPntInd + 1,
2260 iN0 = ( hasLeftNode || hasOwnLeftNode || isClosedEdge || !isShrinkableL ),
2261 iNE = nbN - ( hasRightNode || hasOwnRightNode || !isShrinkableR );
2263 // update _uvIn of end _LayerEdge's by existing nodes
2264 const SMDS_MeshNode *nL = 0, *nR = 0;
2265 if ( hasOwnLeftNode ) nL = L._leftNodes.back();
2266 else if ( hasLeftNode ) nL = L._leftLine->_rightNodes.back();
2267 if ( hasOwnRightNode ) nR = L._rightNodes.back();
2268 else if ( hasRightNode ) nR = L._rightLine->_leftNodes.back();
2270 L._lEdges[0]._uvIn = _helper.GetNodeUV( _face, nL, points[ L._firstPntInd + 1 ].node );
2272 L._lEdges.back()._uvIn = _helper.GetNodeUV( _face, nR, points[ L._lastPntInd - 1 ].node );
2274 // compute normalized [0;1] node parameters of nodes on a _PolyLine
2275 vector< double > normPar( nbN );
2277 normF = L._wire->FirstParameter( L._edgeInd ),
2278 normL = L._wire->LastParameter ( L._edgeInd ),
2279 normDist = normL - normF;
2280 for ( int i = L._firstPntInd; i <= L._lastPntInd; ++i )
2281 normPar[ i - L._firstPntInd ] = ( points[i].normParam - normF ) / normDist;
2283 // Calculate UV of most inner nodes
2285 vector< gp_XY > innerUV( nbN );
2287 // check if innerUV should be interpolated between _LayerEdge::_uvIn's
2288 const size_t nbLE = L._lEdges.size();
2289 bool needInterpol = ( nbN != nbLE );
2290 if ( !needInterpol )
2292 // more check: compare length of inner and outer end segments
2293 double lenIn, lenOut;
2294 for ( int isR = 0; isR < 2 && !needInterpol; ++isR )
2296 const _Segment& segIn = isR ? L._segments.back() : L._segments[0];
2297 const gp_XY& uvIn1 = segIn.p1();
2298 const gp_XY& uvIn2 = segIn.p2();
2299 const gp_XY& uvOut1 = L._lEdges[ isR ? nbLE-1 : 0 ]._uvOut;
2300 const gp_XY& uvOut2 = L._lEdges[ isR ? nbLE-2 : 1 ]._uvOut;
2301 if ( _is2DIsotropic )
2303 lenIn = ( uvIn1 - uvIn2 ).Modulus();
2304 lenOut = ( uvOut1 - uvOut2 ).Modulus();
2308 lenIn = _surface->Value( uvIn1.X(), uvIn1.Y() )
2309 .Distance( _surface->Value( uvIn2.X(), uvIn2.Y() ));
2310 lenOut = _surface->Value( uvOut1.X(), uvOut1.Y() )
2311 .Distance( _surface->Value( uvOut2.X(), uvOut2.Y() ));
2313 needInterpol = ( lenIn < 0.66 * lenOut );
2319 // compute normalized accumulated length of inner segments
2321 if ( _is2DIsotropic )
2322 for ( iS = 1; iS < segLen.size(); ++iS )
2324 double sLen = ( L._lEdges[iS-1]._uvIn - L._lEdges[iS]._uvIn ).Modulus();
2325 segLen[iS] = segLen[iS-1] + sLen;
2328 for ( iS = 1; iS < segLen.size(); ++iS )
2330 const gp_XY& uv1 = L._lEdges[iS-1]._uvIn;
2331 const gp_XY& uv2 = L._lEdges[iS ]._uvIn;
2332 gp_Pnt p1 = _surface->Value( uv1.X(), uv1.Y() );
2333 gp_Pnt p2 = _surface->Value( uv2.X(), uv2.Y() );
2334 double sLen = p1.Distance( p2 );
2335 segLen[iS] = segLen[iS-1] + sLen;
2337 // normalize the accumulated length
2338 for ( iS = 1; iS < segLen.size(); ++iS )
2339 segLen[iS] /= segLen.back();
2341 // calculate UV of most inner nodes according to the normalized node parameters
2343 for ( size_t i = 0; i < innerUV.size(); ++i )
2345 while ( normPar[i] > segLen[iS+1] )
2347 double r = ( normPar[i] - segLen[iS] ) / ( segLen[iS+1] - segLen[iS] );
2348 innerUV[ i ] = r * L._lEdges[iS+1]._uvIn + (1-r) * L._lEdges[iS]._uvIn;
2351 else // ! needInterpol
2353 for ( size_t i = 0; i < nbLE; ++i )
2354 innerUV[ i ] = L._lEdges[i]._uvIn;
2357 // normalized height of layers
2358 const THypVL* hyp = getLineHypothesis( iL );
2359 calcLayersHeight( 1., layersHeight, hyp);
2361 // Create layers of faces
2363 // nodes to create 1 layer of faces
2364 vector< const SMDS_MeshNode* > outerNodes( nbN );
2365 vector< const SMDS_MeshNode* > innerNodes( nbN );
2367 // initialize outerNodes by nodes of the L._wire
2368 for ( int i = L._firstPntInd; i <= L._lastPntInd; ++i )
2369 outerNodes[ i-L._firstPntInd ] = points[i].node;
2371 L._leftNodes .reserve( hyp->GetNumberLayers() );
2372 L._rightNodes.reserve( hyp->GetNumberLayers() );
2373 int cur = 0, prev = -1; // to take into account orientation of _face
2374 if ( isReverse ) std::swap( cur, prev );
2375 for ( int iF = 0; iF < hyp->GetNumberLayers(); ++iF ) // loop on layers of faces
2377 // create innerNodes of a current layer
2378 for ( size_t i = iN0; i < iNE; ++i )
2380 gp_XY uvOut = points[ L._firstPntInd + i ].UV();
2381 gp_XY& uvIn = innerUV[ i ];
2382 gp_XY uv = layersHeight[ iF ] * uvIn + ( 1.-layersHeight[ iF ]) * uvOut;
2383 gp_Pnt p = _surface->Value( uv.X(), uv.Y() );
2384 innerNodes[i] = _helper.AddNode( p.X(), p.Y(), p.Z(), /*id=*/0, uv.X(), uv.Y() );
2386 // use nodes created for adjacent _PolyLine's
2387 if ( hasOwnLeftNode ) innerNodes.front() = L._leftNodes [ iF ];
2388 else if ( hasLeftNode ) innerNodes.front() = L._leftLine->_rightNodes[ iF ];
2389 if ( hasOwnRightNode ) innerNodes.back() = L._rightNodes[ iF ];
2390 else if ( hasRightNode ) innerNodes.back() = L._rightLine->_leftNodes[ iF ];
2391 if ( isClosedEdge ) innerNodes.front() = innerNodes.back(); // circle
2392 if ( !isShrinkableL ) innerNodes.front() = outerNodes.front();
2393 if ( !isShrinkableR ) innerNodes.back() = outerNodes.back();
2394 if ( !hasOwnLeftNode ) L._leftNodes.push_back( innerNodes.front() );
2395 if ( !hasOwnRightNode ) L._rightNodes.push_back( innerNodes.back() );
2398 for ( size_t i = 1; i < innerNodes.size(); ++i )
2399 if ( SMDS_MeshElement* f = _helper.AddFace( outerNodes[ i+prev ], outerNodes[ i+cur ],
2400 innerNodes[ i+cur ], innerNodes[ i+prev ]))
2401 L._newFaces.insert( L._newFaces.end(), f );
2403 outerNodes.swap( innerNodes );
2406 // Add faces to a group
2407 SMDS_MeshGroup* group = StdMeshers_ViscousLayers::CreateGroup( hyp->GetGroupName(),
2412 TIDSortedElemSet::iterator fIt = L._newFaces.begin();
2413 for ( ; fIt != L._newFaces.end(); ++fIt )
2417 // faces between not shared _LayerEdge's (at concave VERTEX)
2418 for ( int isR = 0; isR < 2; ++isR )
2420 if ( isR ? rightEdgeShared : leftEdgeShared )
2422 vector< const SMDS_MeshNode* > &
2423 lNodes = (isR ? L._rightNodes : L._leftLine->_rightNodes ),
2424 rNodes = (isR ? L._rightLine->_leftNodes : L._leftNodes );
2425 if ( lNodes.empty() || rNodes.empty() || lNodes.size() != rNodes.size() )
2428 const SMDS_MeshElement* face = 0;
2429 for ( size_t i = 1; i < lNodes.size(); ++i )
2431 face = _helper.AddFace( lNodes[ i+prev ], rNodes[ i+prev ],
2432 rNodes[ i+cur ], lNodes[ i+cur ]);
2437 const UVPtStruct& ptOnVertex = points[ isR ? L._lastPntInd : L._firstPntInd ];
2439 face = _helper.AddFace( ptOnVertex.node, lNodes[ 0 ], rNodes[ 0 ]);
2441 face = _helper.AddFace( ptOnVertex.node, rNodes[ 0 ], lNodes[ 0 ]);
2446 // Fill the _ProxyMeshOfFace
2448 UVPtStructVec nodeDataVec( outerNodes.size() ); // outerNodes swapped with innerNodes
2449 for ( size_t i = 0; i < outerNodes.size(); ++i )
2451 gp_XY uv = _helper.GetNodeUV( _face, outerNodes[i] );
2452 nodeDataVec[i].u = uv.X();
2453 nodeDataVec[i].v = uv.Y();
2454 nodeDataVec[i].node = outerNodes[i];
2455 nodeDataVec[i].param = points [i + L._firstPntInd].param;
2456 nodeDataVec[i].normParam = normPar[i];
2457 nodeDataVec[i].x = normPar[i];
2458 nodeDataVec[i].y = normPar[i];
2460 nodeDataVec.front().param = L._wire->FirstU( L._edgeInd );
2461 nodeDataVec.back() .param = L._wire->LastU ( L._edgeInd );
2463 if (( nodeDataVec[0].node == nodeDataVec.back().node ) &&
2464 ( _helper.GetPeriodicIndex() == 1 || _helper.GetPeriodicIndex() == 2 )) // closed EDGE
2466 const int iCoord = _helper.GetPeriodicIndex();
2467 gp_XY uv = nodeDataVec[0].UV();
2468 uv.SetCoord( iCoord, L._lEdges[0]._uvOut.Coord( iCoord ));
2469 nodeDataVec[0].SetUV( uv );
2471 uv = nodeDataVec.back().UV();
2472 uv.SetCoord( iCoord, L._lEdges.back()._uvOut.Coord( iCoord ));
2473 nodeDataVec.back().SetUV( uv );
2476 _ProxyMeshOfFace::_EdgeSubMesh* edgeSM
2477 = getProxyMesh()->GetEdgeSubMesh( L._wire->EdgeID( L._edgeInd ));
2478 edgeSM->SetUVPtStructVec( nodeDataVec );
2480 } // loop on _PolyLine's
2482 // re-compute FACEs whose mesh was removed by shrink()
2483 for ( size_t i = 0; i < _clearedFaces.size(); ++i )
2485 SMESH_subMesh* sm = _mesh->GetSubMesh( _clearedFaces[i] );
2486 if ( sm->GetComputeState() == SMESH_subMesh::READY_TO_COMPUTE )
2487 sm->ComputeStateEngine( SMESH_subMesh::COMPUTE );
2493 //================================================================================
2495 * \brief Improve quality of the created mesh elements
2497 //================================================================================
2499 bool _ViscousBuilder2D::improve()
2504 // fixed nodes on EDGE's
2505 std::set<const SMDS_MeshNode*> fixedNodes;
2506 for ( size_t iWire = 0; iWire < _faceSideVec.size(); ++iWire )
2508 StdMeshers_FaceSidePtr wire = _faceSideVec[ iWire ];
2509 const vector<UVPtStruct>& points = wire->GetUVPtStruct();
2510 for ( size_t i = 0; i < points.size(); ++i )
2511 fixedNodes.insert( fixedNodes.end(), points[i].node );
2513 // fixed proxy nodes
2514 for ( size_t iL = 0; iL < _polyLineVec.size(); ++iL )
2516 _PolyLine& L = _polyLineVec[ iL ];
2517 const TopoDS_Edge& E = L._wire->Edge( L._edgeInd );
2518 if ( const SMESH_ProxyMesh::SubMesh* sm = _proxyMesh->GetProxySubMesh( E ))
2520 const UVPtStructVec& points = sm->GetUVPtStructVec();
2521 for ( size_t i = 0; i < points.size(); ++i )
2522 fixedNodes.insert( fixedNodes.end(), points[i].node );
2524 for ( size_t i = 0; i < L._rightNodes.size(); ++i )
2525 fixedNodes.insert( fixedNodes.end(), L._rightNodes[i] );
2529 SMESH_MeshEditor editor( _mesh );
2530 for ( size_t iL = 0; iL < _polyLineVec.size(); ++iL )
2532 _PolyLine& L = _polyLineVec[ iL ];
2533 if ( L._isStraight2D ) continue;
2534 // SMESH_MeshEditor::SmoothMethod how =
2535 // L._isStraight2D ? SMESH_MeshEditor::LAPLACIAN : SMESH_MeshEditor::CENTROIDAL;
2536 //editor.Smooth( L._newFaces, fixedNodes, how, /*nbIt = */3 );
2537 //editor.Smooth( L._newFaces, fixedNodes, SMESH_MeshEditor::LAPLACIAN, /*nbIt = */1 );
2538 editor.Smooth( L._newFaces, fixedNodes, SMESH_MeshEditor::CENTROIDAL, /*nbIt = */3 );
2543 //================================================================================
2545 * \brief Remove elements and nodes from a face
2547 //================================================================================
2549 bool _ViscousBuilder2D::removeMeshFaces(const TopoDS_Shape& face)
2551 // we don't use SMESH_subMesh::ComputeStateEngine() because of a listener
2552 // which clears EDGEs together with _face.
2553 bool thereWereElems = false;
2554 SMESH_subMesh* sm = _mesh->GetSubMesh( face );
2555 if ( SMESHDS_SubMesh* smDS = sm->GetSubMeshDS() )
2557 SMDS_ElemIteratorPtr eIt = smDS->GetElements();
2558 thereWereElems = eIt->more();
2559 while ( eIt->more() ) getMeshDS()->RemoveFreeElement( eIt->next(), smDS );
2560 SMDS_NodeIteratorPtr nIt = smDS->GetNodes();
2561 while ( nIt->more() ) getMeshDS()->RemoveFreeNode( nIt->next(), smDS );
2563 sm->ComputeStateEngine( SMESH_subMesh::CHECK_COMPUTE_STATE );
2565 return thereWereElems;
2568 //================================================================================
2570 * \brief Returns a hypothesis for a _PolyLine
2572 //================================================================================
2574 const StdMeshers_ViscousLayers2D* _ViscousBuilder2D::getLineHypothesis(int iPL)
2576 return iPL < (int)_hypOfEdge.size() ? _hypOfEdge[ iPL ] : _hyps[0];
2579 //================================================================================
2581 * \brief Returns a layers thickness for a _PolyLine
2583 //================================================================================
2585 double _ViscousBuilder2D::getLineThickness(int iPL)
2587 if ( const StdMeshers_ViscousLayers2D* h = getLineHypothesis( iPL ))
2588 return Min( _maxThickness, h->GetTotalThickness() );
2589 return _maxThickness;
2592 //================================================================================
2594 * \brief Creates a _ProxyMeshOfFace and store it in a sub-mesh of FACE
2596 //================================================================================
2598 _ProxyMeshOfFace* _ViscousBuilder2D::getProxyMesh()
2600 if ( _proxyMesh.get() )
2601 return (_ProxyMeshOfFace*) _proxyMesh.get();
2603 _ProxyMeshOfFace* proxyMeshOfFace = new _ProxyMeshOfFace( *_mesh );
2604 _proxyMesh.reset( proxyMeshOfFace );
2605 new _ProxyMeshHolder( _face, _proxyMesh );
2607 return proxyMeshOfFace;
2610 //================================================================================
2612 * \brief Calculate height of layers for the given thickness. Height is measured
2613 * from the outer boundary
2615 //================================================================================
2617 void _ViscousBuilder2D::calcLayersHeight(const double totalThick,
2618 vector<double>& heights,
2621 const double fPowN = pow( hyp->GetStretchFactor(), hyp->GetNumberLayers() );
2622 heights.resize( hyp->GetNumberLayers() );
2624 if ( fPowN - 1 <= numeric_limits<double>::min() )
2625 h0 = totalThick / hyp->GetNumberLayers();
2627 h0 = totalThick * ( hyp->GetStretchFactor() - 1 )/( fPowN - 1 );
2629 double hSum = 0, hi = h0;
2630 for ( int i = 0; i < hyp->GetNumberLayers(); ++i )
2633 heights[ i ] = hSum;
2634 hi *= hyp->GetStretchFactor();
2638 //================================================================================
2640 * \brief Elongate this _LayerEdge
2642 //================================================================================
2644 bool _LayerEdge::SetNewLength( const double length3D )
2646 if ( _isBlocked ) return false;
2648 //_uvInPrev = _uvIn;
2649 _length2D = length3D * _len2dTo3dRatio;
2650 _uvIn = _uvOut + _normal2D * _length2D;
2654 //================================================================================
2656 * \brief Return true if _LayerEdge at a common VERTEX between EDGEs with
2657 * and w/o layer is common to the both _PolyLine's. If this is true, nodes
2658 * of this _LayerEdge are inflated along a _PolyLine w/o layer, else the nodes
2659 * are inflated along _normal2D of _LayerEdge of EDGE with layer
2661 //================================================================================
2663 bool _PolyLine::IsCommonEdgeShared( const _PolyLine& other )
2665 const double tol = 1e-30;
2667 if ( & other == _leftLine )
2668 return _lEdges[0]._normal2D.IsEqual( _leftLine->_lEdges.back()._normal2D, tol );
2670 if ( & other == _rightLine )
2671 return _lEdges.back()._normal2D.IsEqual( _rightLine->_lEdges[0]._normal2D, tol );
2676 //================================================================================
2678 * \brief Return \c true if the EDGE of this _PolyLine is concave
2680 //================================================================================
2682 bool _PolyLine::IsConcave() const
2684 if ( _lEdges.size() < 2 )
2687 gp_Vec2d v1( _lEdges[0]._uvOut, _lEdges[1]._uvOut );
2688 gp_Vec2d v2( _lEdges[0]._uvOut, _lEdges[2]._uvOut );
2689 const double size2 = v2.Magnitude();
2691 return ( v1 ^ v2 ) / size2 < -1e-3 * size2;
2694 //================================================================================
2696 * \brief Constructor of SegmentTree
2698 //================================================================================
2700 _SegmentTree::_SegmentTree( const vector< _Segment >& segments ):
2703 _segments.resize( segments.size() );
2704 for ( size_t i = 0; i < segments.size(); ++i )
2705 _segments[i].Set( segments[i] );
2710 //================================================================================
2712 * \brief Return the maximal bnd box
2714 //================================================================================
2716 _SegmentTree::box_type* _SegmentTree::buildRootBox()
2718 _SegmentTree::box_type* box = new _SegmentTree::box_type;
2719 for ( size_t i = 0; i < _segments.size(); ++i )
2721 box->Add( *_segments[i]._seg->_uv[0] );
2722 box->Add( *_segments[i]._seg->_uv[1] );
2727 //================================================================================
2729 * \brief Redistrubute _segments among children
2731 //================================================================================
2733 void _SegmentTree::buildChildrenData()
2735 for ( size_t i = 0; i < _segments.size(); ++i )
2736 for (int j = 0; j < nbChildren(); j++)
2737 if ( !myChildren[j]->getBox()->IsOut( *_segments[i]._seg->_uv[0],
2738 *_segments[i]._seg->_uv[1] ))
2739 ((_SegmentTree*)myChildren[j])->_segments.push_back( _segments[i]);
2741 SMESHUtils::FreeVector( _segments ); // = _elements.clear() + free memory
2743 for (int j = 0; j < nbChildren(); j++)
2745 _SegmentTree* child = static_cast<_SegmentTree*>( myChildren[j]);
2746 child->myIsLeaf = ((int) child->_segments.size() <= maxNbSegInLeaf() );
2750 //================================================================================
2752 * \brief Return elements which can include the point
2754 //================================================================================
2756 void _SegmentTree::GetSegmentsNear( const _Segment& seg,
2757 vector< const _Segment* >& found )
2759 if ( getBox()->IsOut( *seg._uv[0], *seg._uv[1] ))
2764 for ( size_t i = 0; i < _segments.size(); ++i )
2765 if ( !_segments[i].IsOut( seg ))
2766 found.push_back( _segments[i]._seg );
2770 for (int i = 0; i < nbChildren(); i++)
2771 ((_SegmentTree*) myChildren[i])->GetSegmentsNear( seg, found );
2776 //================================================================================
2778 * \brief Return segments intersecting a ray
2780 //================================================================================
2782 void _SegmentTree::GetSegmentsNear( const gp_Ax2d& ray,
2783 vector< const _Segment* >& found )
2785 if ( getBox()->IsOut( ray ))
2790 for ( size_t i = 0; i < _segments.size(); ++i )
2791 if ( !_segments[i].IsOut( ray ))
2792 found.push_back( _segments[i]._seg );
2796 for (int i = 0; i < nbChildren(); i++)
2797 ((_SegmentTree*) myChildren[i])->GetSegmentsNear( ray, found );
2801 //================================================================================
2803 * \brief Classify a _Segment
2805 //================================================================================
2807 bool _SegmentTree::_SegBox::IsOut( const _Segment& seg ) const
2809 const double eps = std::numeric_limits<double>::min();
2810 for ( int iC = 0; iC < 2; ++iC )
2812 if ( seg._uv[0]->Coord(iC+1) < _seg->_uv[ _iMin[iC]]->Coord(iC+1)+eps &&
2813 seg._uv[1]->Coord(iC+1) < _seg->_uv[ _iMin[iC]]->Coord(iC+1)+eps )
2815 if ( seg._uv[0]->Coord(iC+1) > _seg->_uv[ 1-_iMin[iC]]->Coord(iC+1)-eps &&
2816 seg._uv[1]->Coord(iC+1) > _seg->_uv[ 1-_iMin[iC]]->Coord(iC+1)-eps )
2822 //================================================================================
2824 * \brief Classify a ray
2826 //================================================================================
2828 bool _SegmentTree::_SegBox::IsOut( const gp_Ax2d& ray ) const
2830 double distBoxCenter2Ray =
2831 ray.Direction().XY() ^ ( ray.Location().XY() - 0.5 * (*_seg->_uv[0] + *_seg->_uv[1]));
2833 double boxSectionDiam =
2834 Abs( ray.Direction().X() ) * ( _seg->_uv[1-_iMin[1]]->Y() - _seg->_uv[_iMin[1]]->Y() ) +
2835 Abs( ray.Direction().Y() ) * ( _seg->_uv[1-_iMin[0]]->X() - _seg->_uv[_iMin[0]]->X() );
2837 return Abs( distBoxCenter2Ray ) > 0.5 * boxSectionDiam;