ForkMaster/smesh
1
0
Fork 0
mirror of https://git.salome-platform.org/gitpub/modules/smesh.git synced 2024-09-29 22:22:51 +05:00
Code Issues Packages Projects Releases Wiki Activity
b8fd583be5
smesh/src/StdMeshers/StdMeshers_ViscousLayers.cxx
eap b8fd583be5 Regression of 21397: EDF SMESH: a quadrangle face mesh can't be projected to a cylinder 
+ 52675: Viscous Layers construction fails with certain hypotheses
    Fix normal to be well visible from all faces -> thickness reaches 0.0007
2015-04-09 21:07:54 +03:00

7798 lines
269 KiB
C++
Raw Blame History

// Copyright (C) 2007-2015 CEA/DEN, EDF R&D, OPEN CASCADE
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
// See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
//
// File : StdMeshers_ViscousLayers.cxx
// Created : Wed Dec 1 15:15:34 2010
// Author : Edward AGAPOV (eap)
#include "StdMeshers_ViscousLayers.hxx"
#include "SMDS_EdgePosition.hxx"
#include "SMDS_FaceOfNodes.hxx"
#include "SMDS_FacePosition.hxx"
#include "SMDS_MeshNode.hxx"
#include "SMDS_SetIterator.hxx"
#include "SMESHDS_Group.hxx"
#include "SMESHDS_Hypothesis.hxx"
#include "SMESH_Algo.hxx"
#include "SMESH_ComputeError.hxx"
#include "SMESH_ControlsDef.hxx"
#include "SMESH_Gen.hxx"
#include "SMESH_Group.hxx"
#include "SMESH_HypoFilter.hxx"
#include "SMESH_Mesh.hxx"
#include "SMESH_MeshAlgos.hxx"
#include "SMESH_MesherHelper.hxx"
#include "SMESH_ProxyMesh.hxx"
#include "SMESH_subMesh.hxx"
#include "SMESH_subMeshEventListener.hxx"
#include "StdMeshers_FaceSide.hxx"
#include <Adaptor3d_HSurface.hxx>
#include <BRepAdaptor_Curve2d.hxx>
#include <BRepAdaptor_Surface.hxx>
#include <BRepLProp_SLProps.hxx>
#include <BRep_Tool.hxx>
#include <Bnd_B2d.hxx>
#include <Bnd_B3d.hxx>
#include <ElCLib.hxx>
#include <GCPnts_AbscissaPoint.hxx>
#include <Geom2d_Circle.hxx>
#include <Geom2d_Line.hxx>
#include <Geom2d_TrimmedCurve.hxx>
#include <GeomAdaptor_Curve.hxx>
#include <GeomLib.hxx>
#include <Geom_Circle.hxx>
#include <Geom_Curve.hxx>
#include <Geom_Line.hxx>
#include <Geom_TrimmedCurve.hxx>
#include <Precision.hxx>
#include <Standard_ErrorHandler.hxx>
#include <Standard_Failure.hxx>
#include <TColStd_Array1OfReal.hxx>
#include <TopExp.hxx>
#include <TopExp_Explorer.hxx>
#include <TopTools_IndexedMapOfShape.hxx>
#include <TopTools_ListOfShape.hxx>
#include <TopTools_MapOfShape.hxx>
#include <TopoDS.hxx>
#include <TopoDS_Edge.hxx>
#include <TopoDS_Face.hxx>
#include <TopoDS_Vertex.hxx>
#include <gp_Ax1.hxx>
#include <gp_Cone.hxx>
#include <gp_Sphere.hxx>
#include <gp_Vec.hxx>
#include <gp_XY.hxx>
#include <list>
#include <string>
#include <cmath>
#include <limits>
#ifdef _DEBUG_
//#define __myDEBUG
//#define __NOT_INVALIDATE_BAD_SMOOTH
#endif
using namespace std;
//================================================================================
namespace VISCOUS_3D
{
typedef int TGeomID;
enum UIndex { U_TGT = 1, U_SRC, LEN_TGT };
const double theMinSmoothCosin = 0.1;
const double theSmoothThickToElemSizeRatio = 0.3;
// what part of thickness is allowed till intersection
// (defined by SALOME_TESTS/Grids/smesh/viscous_layers_00/A5)
const double theThickToIntersection = 1.5;
bool needSmoothing( double cosin, double tgtThick, double elemSize )
{
return cosin * tgtThick > theSmoothThickToElemSizeRatio * elemSize;
}
/*!
* \brief SMESH_ProxyMesh computed by _ViscousBuilder for a SOLID.
* It is stored in a SMESH_subMesh of the SOLID as SMESH_subMeshEventListenerData
*/
struct _MeshOfSolid : public SMESH_ProxyMesh,
public SMESH_subMeshEventListenerData
{
bool _n2nMapComputed;
SMESH_ComputeErrorPtr _warning;
_MeshOfSolid( SMESH_Mesh* mesh)
:SMESH_subMeshEventListenerData( /*isDeletable=*/true),_n2nMapComputed(false)
{
SMESH_ProxyMesh::setMesh( *mesh );
}
// returns submesh for a geom face
SMESH_ProxyMesh::SubMesh* getFaceSubM(const TopoDS_Face& F, bool create=false)
{
TGeomID i = SMESH_ProxyMesh::shapeIndex(F);
return create ? SMESH_ProxyMesh::getProxySubMesh(i) : findProxySubMesh(i);
}
void setNode2Node(const SMDS_MeshNode* srcNode,
const SMDS_MeshNode* proxyNode,
const SMESH_ProxyMesh::SubMesh* subMesh)
{
SMESH_ProxyMesh::setNode2Node( srcNode,proxyNode,subMesh);
}
};
//--------------------------------------------------------------------------------
/*!
* \brief Listener of events of 3D sub-meshes computed with viscous layers.
* It is used to clear an inferior dim sub-meshes modified by viscous layers
*/
class _ShrinkShapeListener : SMESH_subMeshEventListener
{
_ShrinkShapeListener()
: SMESH_subMeshEventListener(/*isDeletable=*/false,
"StdMeshers_ViscousLayers::_ShrinkShapeListener") {}
public:
static SMESH_subMeshEventListener* Get() { static _ShrinkShapeListener l; return &l; }
virtual void ProcessEvent(const int event,
const int eventType,
SMESH_subMesh* solidSM,
SMESH_subMeshEventListenerData* data,
const SMESH_Hypothesis* hyp)
{
if ( SMESH_subMesh::COMPUTE_EVENT == eventType && solidSM->IsEmpty() && data )
{
SMESH_subMeshEventListener::ProcessEvent(event,eventType,solidSM,data,hyp);
}
}
};
//--------------------------------------------------------------------------------
/*!
* \brief Listener of events of 3D sub-meshes computed with viscous layers.
* It is used to store data computed by _ViscousBuilder for a sub-mesh and to
* delete the data as soon as it has been used
*/
class _ViscousListener : SMESH_subMeshEventListener
{
_ViscousListener():
SMESH_subMeshEventListener(/*isDeletable=*/false,
"StdMeshers_ViscousLayers::_ViscousListener") {}
static SMESH_subMeshEventListener* Get() { static _ViscousListener l; return &l; }
public:
virtual void ProcessEvent(const int event,
const int eventType,
SMESH_subMesh* subMesh,
SMESH_subMeshEventListenerData* data,
const SMESH_Hypothesis* hyp)
{
if ( SMESH_subMesh::COMPUTE_EVENT == eventType &&
SMESH_subMesh::CHECK_COMPUTE_STATE != event)
{
// delete SMESH_ProxyMesh containing temporary faces
subMesh->DeleteEventListener( this );
}
}
// Finds or creates proxy mesh of the solid
static _MeshOfSolid* GetSolidMesh(SMESH_Mesh* mesh,
const TopoDS_Shape& solid,
bool toCreate=false)
{
if ( !mesh ) return 0;
SMESH_subMesh* sm = mesh->GetSubMesh(solid);
_MeshOfSolid* data = (_MeshOfSolid*) sm->GetEventListenerData( Get() );
if ( !data && toCreate )
{
data = new _MeshOfSolid(mesh);
data->mySubMeshes.push_back( sm ); // to find SOLID by _MeshOfSolid
sm->SetEventListener( Get(), data, sm );
}
return data;
}
// Removes proxy mesh of the solid
static void RemoveSolidMesh(SMESH_Mesh* mesh, const TopoDS_Shape& solid)
{
mesh->GetSubMesh(solid)->DeleteEventListener( _ViscousListener::Get() );
}
};
//================================================================================
/*!
* \brief sets a sub-mesh event listener to clear sub-meshes of sub-shapes of
* the main shape when sub-mesh of the main shape is cleared,
* for example to clear sub-meshes of FACEs when sub-mesh of a SOLID
* is cleared
*/
//================================================================================
void ToClearSubWithMain( SMESH_subMesh* sub, const TopoDS_Shape& main)
{
SMESH_subMesh* mainSM = sub->GetFather()->GetSubMesh( main );
SMESH_subMeshEventListenerData* data =
mainSM->GetEventListenerData( _ShrinkShapeListener::Get());
if ( data )
{
if ( find( data->mySubMeshes.begin(), data->mySubMeshes.end(), sub ) ==
data->mySubMeshes.end())
data->mySubMeshes.push_back( sub );
}
else
{
data = SMESH_subMeshEventListenerData::MakeData( /*dependent=*/sub );
sub->SetEventListener( _ShrinkShapeListener::Get(), data, /*whereToListenTo=*/mainSM );
}
}
struct _SolidData;
//--------------------------------------------------------------------------------
/*!
* \brief Simplex (triangle or tetrahedron) based on 1 (tria) or 2 (tet) nodes of
* _LayerEdge and 2 nodes of the mesh surface beening smoothed.
* The class is used to check validity of face or volumes around a smoothed node;
* it stores only 2 nodes as the other nodes are stored by _LayerEdge.
*/
struct _Simplex
{
const SMDS_MeshNode *_nPrev, *_nNext; // nodes on a smoothed mesh surface
const SMDS_MeshNode *_nOpp; // in 2D case, a node opposite to a smoothed node in QUAD
_Simplex(const SMDS_MeshNode* nPrev=0,
const SMDS_MeshNode* nNext=0,
const SMDS_MeshNode* nOpp=0)
: _nPrev(nPrev), _nNext(nNext), _nOpp(nOpp) {}
bool IsForward(const SMDS_MeshNode* nSrc, const gp_XYZ* pntTgt, double& vol) const
{
const double M[3][3] =
{{ _nNext->X() - nSrc->X(), _nNext->Y() - nSrc->Y(), _nNext->Z() - nSrc->Z() },
{ pntTgt->X() - nSrc->X(), pntTgt->Y() - nSrc->Y(), pntTgt->Z() - nSrc->Z() },
{ _nPrev->X() - nSrc->X(), _nPrev->Y() - nSrc->Y(), _nPrev->Z() - nSrc->Z() }};
vol = ( + M[0][0]*M[1][1]*M[2][2]
+ M[0][1]*M[1][2]*M[2][0]
+ M[0][2]*M[1][0]*M[2][1]
- M[0][0]*M[1][2]*M[2][1]
- M[0][1]*M[1][0]*M[2][2]
- M[0][2]*M[1][1]*M[2][0]);
return vol > 1e-100;
}
bool IsForward(const gp_XY& tgtUV,
const SMDS_MeshNode* smoothedNode,
const TopoDS_Face& face,
SMESH_MesherHelper& helper,
const double refSign) const
{
gp_XY prevUV = helper.GetNodeUV( face, _nPrev, smoothedNode );
gp_XY nextUV = helper.GetNodeUV( face, _nNext, smoothedNode );
gp_Vec2d v1( tgtUV, prevUV ), v2( tgtUV, nextUV );
double d = v1 ^ v2;
return d*refSign > 1e-100;
}
bool IsNeighbour(const _Simplex& other) const
{
return _nPrev == other._nNext || _nNext == other._nPrev;
}
static void GetSimplices( const SMDS_MeshNode* node,
vector<_Simplex>& simplices,
const set<TGeomID>& ingnoreShapes,
const _SolidData* dataToCheckOri = 0,
const bool toSort = false);
static void SortSimplices(vector<_Simplex>& simplices);
};
//--------------------------------------------------------------------------------
/*!
* Structure used to take into account surface curvature while smoothing
*/
struct _Curvature
{
double _r; // radius
double _k; // factor to correct node smoothed position
double _h2lenRatio; // avgNormProj / (2*avgDist)
public:
static _Curvature* New( double avgNormProj, double avgDist )
{
_Curvature* c = 0;
if ( fabs( avgNormProj / avgDist ) > 1./200 )
{
c = new _Curvature;
c->_r = avgDist * avgDist / avgNormProj;
c->_k = avgDist * avgDist / c->_r / c->_r;
//c->_k = avgNormProj / c->_r;
c->_k *= ( c->_r < 0 ? 1/1.1 : 1.1 ); // not to be too restrictive
c->_h2lenRatio = avgNormProj / ( avgDist + avgDist );
}
return c;
}
double lenDelta(double len) const { return _k * ( _r + len ); }
double lenDeltaByDist(double dist) const { return dist * _h2lenRatio; }
};
//--------------------------------------------------------------------------------
struct _2NearEdges;
struct _LayerEdge;
struct _EdgesOnShape;
typedef map< const SMDS_MeshNode*, _LayerEdge*, TIDCompare > TNode2Edge;
//--------------------------------------------------------------------------------
/*!
* \brief Edge normal to surface, connecting a node on solid surface (_nodes[0])
* and a node of the most internal layer (_nodes.back())
*/
struct _LayerEdge
{
typedef gp_XYZ (_LayerEdge::*PSmooFun)();
vector< const SMDS_MeshNode*> _nodes;
gp_XYZ _normal; // to solid surface
vector<gp_XYZ> _pos; // points computed during inflation
double _len; // length achived with the last inflation step
double _cosin; // of angle (_normal ^ surface)
double _lenFactor; // to compute _len taking _cosin into account
// face or edge w/o layer along or near which _LayerEdge is inflated
//TopoDS_Shape* _sWOL;
// simplices connected to the source node (_nodes[0]);
// used for smoothing and quality check of _LayerEdge's based on the FACE
vector<_Simplex> _simplices;
PSmooFun _smooFunction; // smoothing function
// data for smoothing of _LayerEdge's based on the EDGE
_2NearEdges* _2neibors;
_Curvature* _curvature;
// TODO:: detele _Curvature, _plnNorm
void SetNewLength( double len, _EdgesOnShape& eos, SMESH_MesherHelper& helper );
bool SetNewLength2d( Handle(Geom_Surface)& surface,
const TopoDS_Face& F,
_EdgesOnShape& eos,
SMESH_MesherHelper& helper );
void SetDataByNeighbors( const SMDS_MeshNode* n1,
const SMDS_MeshNode* n2,
const _EdgesOnShape& eos,
SMESH_MesherHelper& helper);
void InvalidateStep( int curStep, const _EdgesOnShape& eos, bool restoreLength=false );
void ChooseSmooFunction(const set< TGeomID >& concaveVertices,
const TNode2Edge& n2eMap);
int Smooth(const int step, const bool isConcaveFace, const bool findBest);
bool SmoothOnEdge(Handle(Geom_Surface)& surface,
const TopoDS_Face& F,
SMESH_MesherHelper& helper);
bool FindIntersection( SMESH_ElementSearcher& searcher,
double & distance,
const double& epsilon,
_EdgesOnShape& eos,
const SMDS_MeshElement** face = 0);
bool SegTriaInter( const gp_Ax1& lastSegment,
const SMDS_MeshNode* n0,
const SMDS_MeshNode* n1,
const SMDS_MeshNode* n2,
double& dist,
const double& epsilon) const;
gp_Ax1 LastSegment(double& segLen, _EdgesOnShape& eos) const;
gp_XY LastUV( const TopoDS_Face& F, _EdgesOnShape& eos ) const;
bool IsOnEdge() const { return _2neibors; }
gp_XYZ Copy( _LayerEdge& other, _EdgesOnShape& eos, SMESH_MesherHelper& helper );
void SetCosin( double cosin );
int NbSteps() const { return _pos.size() - 1; } // nb inlation steps
gp_XYZ smoothLaplacian();
gp_XYZ smoothAngular();
gp_XYZ smoothLengthWeighted();
gp_XYZ smoothCentroidal();
gp_XYZ smoothNefPolygon();
enum { FUN_LAPLACIAN, FUN_LENWEIGHTED, FUN_CENTROIDAL, FUN_NEFPOLY, FUN_ANGULAR, FUN_NB };
static const int theNbSmooFuns = FUN_NB;
static PSmooFun _funs[theNbSmooFuns];
static const char* _funNames[theNbSmooFuns+1];
int smooFunID( PSmooFun fun=0) const;
};
_LayerEdge::PSmooFun _LayerEdge::_funs[theNbSmooFuns] = { &_LayerEdge::smoothLaplacian,
&_LayerEdge::smoothLengthWeighted,
&_LayerEdge::smoothCentroidal,
&_LayerEdge::smoothNefPolygon,
&_LayerEdge::smoothAngular };
const char* _LayerEdge::_funNames[theNbSmooFuns+1] = { "Laplacian",
"LengthWeighted",
"Centroidal",
"NefPolygon",
"Angular",
"None"};
struct _LayerEdgeCmp
{
bool operator () (const _LayerEdge* e1, const _LayerEdge* e2) const
{
const bool cmpNodes = ( e1 && e2 && e1->_nodes.size() && e2->_nodes.size() );
return cmpNodes ? ( e1->_nodes[0]->GetID() < e2->_nodes[0]->GetID()) : ( e1 < e2 );
}
};
//--------------------------------------------------------------------------------
/*!
* A 2D half plane used by _LayerEdge::smoothNefPolygon()
*/
struct _halfPlane
{
gp_XY _pos, _dir, _inNorm;
bool IsOut( const gp_XY p, const double tol ) const
{
return _inNorm * ( p - _pos ) < -tol;
}
bool FindInterestion( const _halfPlane& hp, gp_XY & intPnt )
{
const double eps = 1e-10;
double D = _dir.Crossed( hp._dir );
if ( fabs(D) < std::numeric_limits<double>::min())
return false;
gp_XY vec21 = _pos - hp._pos;
double u = hp._dir.Crossed( vec21 ) / D;
intPnt = _pos + _dir * u;
return true;
}
};
//--------------------------------------------------------------------------------
/*!
* Structure used to smooth a _LayerEdge based on an EDGE.
*/
struct _2NearEdges
{
double _wgt [2]; // weights of _nodes
_LayerEdge* _edges[2];
// normal to plane passing through _LayerEdge._normal and tangent of EDGE
gp_XYZ* _plnNorm;
_2NearEdges() { _edges[0]=_edges[1]=0; _plnNorm = 0; }
const SMDS_MeshNode* tgtNode(bool is2nd) {
return _edges[is2nd] ? _edges[is2nd]->_nodes.back() : 0;
}
const SMDS_MeshNode* srcNode(bool is2nd) {
return _edges[is2nd] ? _edges[is2nd]->_nodes[0] : 0;
}
void reverse() {
std::swap( _wgt [0], _wgt [1] );
std::swap( _edges[0], _edges[1] );
}
};
//--------------------------------------------------------------------------------
/*!
* \brief Layers parameters got by averaging several hypotheses
*/
struct AverageHyp
{
AverageHyp( const StdMeshers_ViscousLayers* hyp = 0 )
:_nbLayers(0), _nbHyps(0), _thickness(0), _stretchFactor(0), _method(0)
{
Add( hyp );
}
void Add( const StdMeshers_ViscousLayers* hyp )
{
if ( hyp )
{
_nbHyps++;
_nbLayers = hyp->GetNumberLayers();
//_thickness += hyp->GetTotalThickness();
_thickness = Max( _thickness, hyp->GetTotalThickness() );
_stretchFactor += hyp->GetStretchFactor();
_method = hyp->GetMethod();
}
}
double GetTotalThickness() const { return _thickness; /*_nbHyps ? _thickness / _nbHyps : 0;*/ }
double GetStretchFactor() const { return _nbHyps ? _stretchFactor / _nbHyps : 0; }
int GetNumberLayers() const { return _nbLayers; }
int GetMethod() const { return _method; }
bool UseSurfaceNormal() const
{ return _method == StdMeshers_ViscousLayers::SURF_OFFSET_SMOOTH; }
bool ToSmooth() const
{ return _method == StdMeshers_ViscousLayers::SURF_OFFSET_SMOOTH; }
bool IsOffsetMethod() const
{ return _method == StdMeshers_ViscousLayers::FACE_OFFSET; }
private:
int _nbLayers, _nbHyps, _method;
double _thickness, _stretchFactor;
};
//--------------------------------------------------------------------------------
/*!
* \brief _LayerEdge's on a shape and other shape data
*/
struct _EdgesOnShape
{
vector< _LayerEdge* > _edges;
TopoDS_Shape _shape;
TGeomID _shapeID;
SMESH_subMesh * _subMesh;
// face or edge w/o layer along or near which _edges are inflated
TopoDS_Shape _sWOL;
// averaged StdMeshers_ViscousLayers parameters
AverageHyp _hyp;
bool _toSmooth;
vector< gp_XYZ > _faceNormals; // if _shape is FACE
vector< _EdgesOnShape* > _faceEOS; // to get _faceNormals of adjacent FACEs
TopAbs_ShapeEnum ShapeType() const
{ return _shape.IsNull() ? TopAbs_SHAPE : _shape.ShapeType(); }
TopAbs_ShapeEnum SWOLType() const
{ return _sWOL.IsNull() ? TopAbs_SHAPE : _sWOL.ShapeType(); }
bool GetNormal( const SMDS_MeshElement* face, gp_Vec& norm );
};
//--------------------------------------------------------------------------------
/*!
* \brief Convex FACE whose radius of curvature is less than the thickness of
* layers. It is used to detect distortion of prisms based on a convex
* FACE and to update normals to enable further increasing the thickness
*/
struct _ConvexFace
{
TopoDS_Face _face;
// edges whose _simplices are used to detect prism destorsion
vector< _LayerEdge* > _simplexTestEdges;
// map a sub-shape to _SolidData::_edgesOnShape
map< TGeomID, _EdgesOnShape* > _subIdToEOS;
bool _normalsFixed;
bool GetCenterOfCurvature( _LayerEdge* ledge,
BRepLProp_SLProps& surfProp,
SMESH_MesherHelper& helper,
gp_Pnt & center ) const;
bool CheckPrisms() const;
};
//--------------------------------------------------------------------------------
/*!
* \brief Data of a SOLID
*/
struct _SolidData
{
typedef const StdMeshers_ViscousLayers* THyp;
TopoDS_Shape _solid;
TGeomID _index; // SOLID id
_MeshOfSolid* _proxyMesh;
list< THyp > _hyps;
list< TopoDS_Shape > _hypShapes;
map< TGeomID, THyp > _face2hyp; // filled if _hyps.size() > 1
set< TGeomID > _reversedFaceIds;
set< TGeomID > _ignoreFaceIds; // WOL FACEs and FACEs of other SOLIDs
double _stepSize, _stepSizeCoeff, _geomSize;
const SMDS_MeshNode* _stepSizeNodes[2];
TNode2Edge _n2eMap; // nodes and _LayerEdge's based on them
// map to find _n2eMap of another _SolidData by a shrink shape shared by two _SolidData's
map< TGeomID, TNode2Edge* > _s2neMap;
// _LayerEdge's with underlying shapes
vector< _EdgesOnShape > _edgesOnShape;
// key: an id of shape (EDGE or VERTEX) shared by a FACE with
// layers and a FACE w/o layers
// value: the shape (FACE or EDGE) to shrink mesh on.
// _LayerEdge's basing on nodes on key shape are inflated along the value shape
map< TGeomID, TopoDS_Shape > _shrinkShape2Shape;
// Convex FACEs whose radius of curvature is less than the thickness of layers
map< TGeomID, _ConvexFace > _convexFaces;
// shapes (EDGEs and VERTEXes) srink from which is forbidden due to collisions with
// the adjacent SOLID
set< TGeomID > _noShrinkShapes;
int _nbShapesToSmooth;
// <EDGE to smooth on> to <it's curve> -- for analytic smooth
map< TGeomID,Handle(Geom_Curve)> _edge2curve;
set< TGeomID > _concaveFaces;
double _maxThickness; // of all _hyps
double _minThickness; // of all _hyps
double _epsilon; // precision for SegTriaInter()
_SolidData(const TopoDS_Shape& s=TopoDS_Shape(),
_MeshOfSolid* m=0)
:_solid(s), _proxyMesh(m) {}
~_SolidData();
Handle(Geom_Curve) CurveForSmooth( const TopoDS_Edge& E,
_EdgesOnShape& eos,
SMESH_MesherHelper& helper);
void SortOnEdge( const TopoDS_Edge& E,
vector< _LayerEdge* >& edges,
SMESH_MesherHelper& helper);
void Sort2NeiborsOnEdge( vector< _LayerEdge* >& edges );
_ConvexFace* GetConvexFace( const TGeomID faceID )
{
map< TGeomID, _ConvexFace >::iterator id2face = _convexFaces.find( faceID );
return id2face == _convexFaces.end() ? 0 : & id2face->second;
}
_EdgesOnShape* GetShapeEdges(const TGeomID shapeID );
_EdgesOnShape* GetShapeEdges(const TopoDS_Shape& shape );
_EdgesOnShape* GetShapeEdges(const _LayerEdge* edge )
{ return GetShapeEdges( edge->_nodes[0]->getshapeId() ); }
void AddShapesToSmooth( const set< _EdgesOnShape* >& shape );
void PrepareEdgesToSmoothOnFace( _EdgesOnShape* eof, bool substituteSrcNodes );
};
//--------------------------------------------------------------------------------
/*!
* \brief Container of centers of curvature at nodes on an EDGE bounding _ConvexFace
*/
struct _CentralCurveOnEdge
{
bool _isDegenerated;
vector< gp_Pnt > _curvaCenters;
vector< _LayerEdge* > _ledges;
vector< gp_XYZ > _normals; // new normal for each of _ledges
vector< double > _segLength2;
TopoDS_Edge _edge;
TopoDS_Face _adjFace;
bool _adjFaceToSmooth;
void Append( const gp_Pnt& center, _LayerEdge* ledge )
{
if ( _curvaCenters.size() > 0 )
_segLength2.push_back( center.SquareDistance( _curvaCenters.back() ));
_curvaCenters.push_back( center );
_ledges.push_back( ledge );
_normals.push_back( ledge->_normal );
}
bool FindNewNormal( const gp_Pnt& center, gp_XYZ& newNormal );
void SetShapes( const TopoDS_Edge& edge,
const _ConvexFace& convFace,
_SolidData& data,
SMESH_MesherHelper& helper);
};
//--------------------------------------------------------------------------------
/*!
* \brief Data of node on a shrinked FACE
*/
struct _SmoothNode
{
const SMDS_MeshNode* _node;
vector<_Simplex> _simplices; // for quality check
enum SmoothType { LAPLACIAN, CENTROIDAL, ANGULAR, TFI };
bool Smooth(int& badNb,
Handle(Geom_Surface)& surface,
SMESH_MesherHelper& helper,
const double refSign,
SmoothType how,
bool set3D);
gp_XY computeAngularPos(vector<gp_XY>& uv,
const gp_XY& uvToFix,
const double refSign );
};
//--------------------------------------------------------------------------------
/*!
* \brief Builder of viscous layers
*/
class _ViscousBuilder
{
public:
_ViscousBuilder();
// does it's job
SMESH_ComputeErrorPtr Compute(SMESH_Mesh& mesh,
const TopoDS_Shape& shape);
// check validity of hypotheses
SMESH_ComputeErrorPtr CheckHypotheses( SMESH_Mesh& mesh,
const TopoDS_Shape& shape );
// restore event listeners used to clear an inferior dim sub-mesh modified by viscous layers
void RestoreListeners();
// computes SMESH_ProxyMesh::SubMesh::_n2n;
bool MakeN2NMap( _MeshOfSolid* pm );
private:
bool findSolidsWithLayers();
bool findFacesWithLayers(const bool onlyWith=false);
void getIgnoreFaces(const TopoDS_Shape& solid,
const StdMeshers_ViscousLayers* hyp,
const TopoDS_Shape& hypShape,
set<TGeomID>& ignoreFaces);
bool makeLayer(_SolidData& data);
void setShapeData( _EdgesOnShape& eos, SMESH_subMesh* sm, _SolidData& data );
bool setEdgeData(_LayerEdge& edge, _EdgesOnShape& eos, const set<TGeomID>& subIds,
SMESH_MesherHelper& helper, _SolidData& data);
gp_XYZ getFaceNormal(const SMDS_MeshNode* n,
const TopoDS_Face& face,
SMESH_MesherHelper& helper,
bool& isOK,
bool shiftInside=false);
bool getFaceNormalAtSingularity(const gp_XY& uv,
const TopoDS_Face& face,
SMESH_MesherHelper& helper,
gp_Dir& normal );
gp_XYZ getWeigthedNormal( const SMDS_MeshNode* n,
std::pair< TopoDS_Face, gp_XYZ > fId2Normal[],
int nbFaces );
bool findNeiborsOnEdge(const _LayerEdge* edge,
const SMDS_MeshNode*& n1,
const SMDS_MeshNode*& n2,
_EdgesOnShape& eos,
_SolidData& data);
void findSimplexTestEdges( _SolidData& data,
vector< vector<_LayerEdge*> >& edgesByGeom);
void computeGeomSize( _SolidData& data );
bool findShapesToSmooth( _SolidData& data);
void limitStepSizeByCurvature( _SolidData& data );
void limitStepSize( _SolidData& data,
const SMDS_MeshElement* face,
const _LayerEdge* maxCosinEdge );
void limitStepSize( _SolidData& data, const double minSize);
bool inflate(_SolidData& data);
bool smoothAndCheck(_SolidData& data, const int nbSteps, double & distToIntersection);
bool smoothAnalyticEdge( _SolidData& data,
_EdgesOnShape& eos,
Handle(Geom_Surface)& surface,
const TopoDS_Face& F,
SMESH_MesherHelper& helper);
bool updateNormals( _SolidData& data, SMESH_MesherHelper& helper, int stepNb );
bool updateNormalsOfConvexFaces( _SolidData& data,
SMESH_MesherHelper& helper,
int stepNb );
bool refine(_SolidData& data);
bool shrink();
bool prepareEdgeToShrink( _LayerEdge& edge, _EdgesOnShape& eos,
SMESH_MesherHelper& helper,
const SMESHDS_SubMesh* faceSubMesh );
void restoreNoShrink( _LayerEdge& edge ) const;
void fixBadFaces(const TopoDS_Face& F,
SMESH_MesherHelper& helper,
const bool is2D,
const int step,
set<const SMDS_MeshNode*> * involvedNodes=NULL);
bool addBoundaryElements();
bool error( const string& text, int solidID=-1 );
SMESHDS_Mesh* getMeshDS() const { return _mesh->GetMeshDS(); }
// debug
void makeGroupOfLE();
SMESH_Mesh* _mesh;
SMESH_ComputeErrorPtr _error;
vector< _SolidData > _sdVec;
int _tmpFaceID;
};
//--------------------------------------------------------------------------------
/*!
* \brief Shrinker of nodes on the EDGE
*/
class _Shrinker1D
{
TopoDS_Edge _geomEdge;
vector<double> _initU;
vector<double> _normPar;
vector<const SMDS_MeshNode*> _nodes;
const _LayerEdge* _edges[2];
bool _done;
public:
void AddEdge( const _LayerEdge* e, _EdgesOnShape& eos, SMESH_MesherHelper& helper );
void Compute(bool set3D, SMESH_MesherHelper& helper);
void RestoreParams();
void SwapSrcTgtNodes(SMESHDS_Mesh* mesh);
};
//--------------------------------------------------------------------------------
/*!
* \brief Class of temporary mesh face.
* We can't use SMDS_FaceOfNodes since it's impossible to set it's ID which is
* needed because SMESH_ElementSearcher internaly uses set of elements sorted by ID
*/
struct _TmpMeshFace : public SMDS_MeshElement
{
vector<const SMDS_MeshNode* > _nn;
_TmpMeshFace( const vector<const SMDS_MeshNode*>& nodes, int id, int faceID=-1):
SMDS_MeshElement(id), _nn(nodes) { setShapeId(faceID); }
virtual const SMDS_MeshNode* GetNode(const int ind) const { return _nn[ind]; }
virtual SMDSAbs_ElementType GetType() const { return SMDSAbs_Face; }
virtual vtkIdType GetVtkType() const { return -1; }
virtual SMDSAbs_EntityType GetEntityType() const { return SMDSEntity_Last; }
virtual SMDSAbs_GeometryType GetGeomType() const
{ return _nn.size() == 3 ? SMDSGeom_TRIANGLE : SMDSGeom_QUADRANGLE; }
virtual SMDS_ElemIteratorPtr elementsIterator(SMDSAbs_ElementType) const
{ return SMDS_ElemIteratorPtr( new SMDS_NodeVectorElemIterator( _nn.begin(), _nn.end()));}
};
//--------------------------------------------------------------------------------
/*!
* \brief Class of temporary mesh face storing _LayerEdge it's based on
*/
struct _TmpMeshFaceOnEdge : public _TmpMeshFace
{
_LayerEdge *_le1, *_le2;
_TmpMeshFaceOnEdge( _LayerEdge* le1, _LayerEdge* le2, int ID ):
_TmpMeshFace( vector<const SMDS_MeshNode*>(4), ID ), _le1(le1), _le2(le2)
{
_nn[0]=_le1->_nodes[0];
_nn[1]=_le1->_nodes.back();
_nn[2]=_le2->_nodes.back();
_nn[3]=_le2->_nodes[0];
}
};
//--------------------------------------------------------------------------------
/*!
* \brief Retriever of node coordinates either directly or from a surface by node UV.
* \warning Location of a surface is ignored
*/
struct _NodeCoordHelper
{
SMESH_MesherHelper& _helper;
const TopoDS_Face& _face;
Handle(Geom_Surface) _surface;
gp_XYZ (_NodeCoordHelper::* _fun)(const SMDS_MeshNode* n) const;
_NodeCoordHelper(const TopoDS_Face& F, SMESH_MesherHelper& helper, bool is2D)
: _helper( helper ), _face( F )
{
if ( is2D )
{
TopLoc_Location loc;
_surface = BRep_Tool::Surface( _face, loc );
}
if ( _surface.IsNull() )
_fun = & _NodeCoordHelper::direct;
else
_fun = & _NodeCoordHelper::byUV;
}
gp_XYZ operator()(const SMDS_MeshNode* n) const { return (this->*_fun)( n ); }
private:
gp_XYZ direct(const SMDS_MeshNode* n) const
{
return SMESH_TNodeXYZ( n );
}
gp_XYZ byUV (const SMDS_MeshNode* n) const
{
gp_XY uv = _helper.GetNodeUV( _face, n );
return _surface->Value( uv.X(), uv.Y() ).XYZ();
}
};
} // namespace VISCOUS_3D
//================================================================================
// StdMeshers_ViscousLayers hypothesis
//
StdMeshers_ViscousLayers::StdMeshers_ViscousLayers(int hypId, int studyId, SMESH_Gen* gen)
:SMESH_Hypothesis(hypId, studyId, gen),
_isToIgnoreShapes(1), _nbLayers(1), _thickness(1), _stretchFactor(1),
_method( SURF_OFFSET_SMOOTH )
{
_name = StdMeshers_ViscousLayers::GetHypType();
_param_algo_dim = -3; // auxiliary hyp used by 3D algos
} // --------------------------------------------------------------------------------
void StdMeshers_ViscousLayers::SetBndShapes(const std::vector<int>& faceIds, bool toIgnore)
{
if ( faceIds != _shapeIds )
_shapeIds = faceIds, NotifySubMeshesHypothesisModification();
if ( _isToIgnoreShapes != toIgnore )
_isToIgnoreShapes = toIgnore, NotifySubMeshesHypothesisModification();
} // --------------------------------------------------------------------------------
void StdMeshers_ViscousLayers::SetTotalThickness(double thickness)
{
if ( thickness != _thickness )
_thickness = thickness, NotifySubMeshesHypothesisModification();
} // --------------------------------------------------------------------------------
void StdMeshers_ViscousLayers::SetNumberLayers(int nb)
{
if ( _nbLayers != nb )
_nbLayers = nb, NotifySubMeshesHypothesisModification();
} // --------------------------------------------------------------------------------
void StdMeshers_ViscousLayers::SetStretchFactor(double factor)
{
if ( _stretchFactor != factor )
_stretchFactor = factor, NotifySubMeshesHypothesisModification();
} // --------------------------------------------------------------------------------
void StdMeshers_ViscousLayers::SetMethod( ExtrusionMethod method )
{
if ( _method != method )
_method = method, NotifySubMeshesHypothesisModification();
} // --------------------------------------------------------------------------------
SMESH_ProxyMesh::Ptr
StdMeshers_ViscousLayers::Compute(SMESH_Mesh& theMesh,
const TopoDS_Shape& theShape,
const bool toMakeN2NMap) const
{
using namespace VISCOUS_3D;
_ViscousBuilder bulder;
SMESH_ComputeErrorPtr err = bulder.Compute( theMesh, theShape );
if ( err && !err->IsOK() )
return SMESH_ProxyMesh::Ptr();
vector<SMESH_ProxyMesh::Ptr> components;
TopExp_Explorer exp( theShape, TopAbs_SOLID );
for ( ; exp.More(); exp.Next() )
{
if ( _MeshOfSolid* pm =
_ViscousListener::GetSolidMesh( &theMesh, exp.Current(), /*toCreate=*/false))
{
if ( toMakeN2NMap && !pm->_n2nMapComputed )
if ( !bulder.MakeN2NMap( pm ))
return SMESH_ProxyMesh::Ptr();
components.push_back( SMESH_ProxyMesh::Ptr( pm ));
pm->myIsDeletable = false; // it will de deleted by boost::shared_ptr
if ( pm->_warning && !pm->_warning->IsOK() )
{
SMESH_subMesh* sm = theMesh.GetSubMesh( exp.Current() );
SMESH_ComputeErrorPtr& smError = sm->GetComputeError();
if ( !smError || smError->IsOK() )
smError = pm->_warning;
}
}
_ViscousListener::RemoveSolidMesh ( &theMesh, exp.Current() );
}
switch ( components.size() )
{
case 0: break;
case 1: return components[0];
default: return SMESH_ProxyMesh::Ptr( new SMESH_ProxyMesh( components ));
}
return SMESH_ProxyMesh::Ptr();
} // --------------------------------------------------------------------------------
std::ostream & StdMeshers_ViscousLayers::SaveTo(std::ostream & save)
{
save << " " << _nbLayers
<< " " << _thickness
<< " " << _stretchFactor
<< " " << _shapeIds.size();
for ( size_t i = 0; i < _shapeIds.size(); ++i )
save << " " << _shapeIds[i];
save << " " << !_isToIgnoreShapes; // negate to keep the behavior in old studies.
save << " " << _method;
return save;
} // --------------------------------------------------------------------------------
std::istream & StdMeshers_ViscousLayers::LoadFrom(std::istream & load)
{
int nbFaces, faceID, shapeToTreat, method;
load >> _nbLayers >> _thickness >> _stretchFactor >> nbFaces;
while ( _shapeIds.size() < nbFaces && load >> faceID )
_shapeIds.push_back( faceID );
if ( load >> shapeToTreat ) {
_isToIgnoreShapes = !shapeToTreat;
if ( load >> method )
_method = (ExtrusionMethod) method;
}
else {
_isToIgnoreShapes = true; // old behavior
}
return load;
} // --------------------------------------------------------------------------------
bool StdMeshers_ViscousLayers::SetParametersByMesh(const SMESH_Mesh* theMesh,
const TopoDS_Shape& theShape)
{
// TODO
return false;
} // --------------------------------------------------------------------------------
SMESH_ComputeErrorPtr
StdMeshers_ViscousLayers::CheckHypothesis(SMESH_Mesh& theMesh,
const TopoDS_Shape& theShape,
SMESH_Hypothesis::Hypothesis_Status& theStatus)
{
VISCOUS_3D::_ViscousBuilder bulder;
SMESH_ComputeErrorPtr err = bulder.CheckHypotheses( theMesh, theShape );
if ( err && !err->IsOK() )
theStatus = SMESH_Hypothesis::HYP_INCOMPAT_HYPS;
else
theStatus = SMESH_Hypothesis::HYP_OK;
return err;
}
// --------------------------------------------------------------------------------
bool StdMeshers_ViscousLayers::IsShapeWithLayers(int shapeIndex) const
{
bool isIn =
( std::find( _shapeIds.begin(), _shapeIds.end(), shapeIndex ) != _shapeIds.end() );
return IsToIgnoreShapes() ? !isIn : isIn;
}
// END StdMeshers_ViscousLayers hypothesis
//================================================================================
namespace VISCOUS_3D
{
gp_XYZ getEdgeDir( const TopoDS_Edge& E, const TopoDS_Vertex& fromV )
{
gp_Vec dir;
double f,l;
Handle(Geom_Curve) c = BRep_Tool::Curve( E, f, l );
gp_Pnt p = BRep_Tool::Pnt( fromV );
double distF = p.SquareDistance( c->Value( f ));
double distL = p.SquareDistance( c->Value( l ));
c->D1(( distF < distL ? f : l), p, dir );
if ( distL < distF ) dir.Reverse();
return dir.XYZ();
}
//--------------------------------------------------------------------------------
gp_XYZ getEdgeDir( const TopoDS_Edge& E, const SMDS_MeshNode* atNode,
SMESH_MesherHelper& helper)
{
gp_Vec dir;
double f,l; gp_Pnt p;
Handle(Geom_Curve) c = BRep_Tool::Curve( E, f, l );
if ( c.IsNull() ) return gp_XYZ( 1e100, 1e100, 1e100 );
double u = helper.GetNodeU( E, atNode );
c->D1( u, p, dir );
return dir.XYZ();
}
//--------------------------------------------------------------------------------
gp_XYZ getFaceDir( const TopoDS_Face& F, const TopoDS_Vertex& fromV,
const SMDS_MeshNode* node, SMESH_MesherHelper& helper, bool& ok,
double* cosin=0);
//--------------------------------------------------------------------------------
gp_XYZ getFaceDir( const TopoDS_Face& F, const TopoDS_Edge& fromE,
const SMDS_MeshNode* node, SMESH_MesherHelper& helper, bool& ok)
{
double f,l;
Handle(Geom_Curve) c = BRep_Tool::Curve( fromE, f, l );
if ( c.IsNull() )
{
TopoDS_Vertex v = helper.IthVertex( 0, fromE );
return getFaceDir( F, v, node, helper, ok );
}
gp_XY uv = helper.GetNodeUV( F, node, 0, &ok );
Handle(Geom_Surface) surface = BRep_Tool::Surface( F );
gp_Pnt p; gp_Vec du, dv, norm;
surface->D1( uv.X(),uv.Y(), p, du,dv );
norm = du ^ dv;
double u = helper.GetNodeU( fromE, node, 0, &ok );
c->D1( u, p, du );
TopAbs_Orientation o = helper.GetSubShapeOri( F.Oriented(TopAbs_FORWARD), fromE);
if ( o == TopAbs_REVERSED )
du.Reverse();
gp_Vec dir = norm ^ du;
if ( node->GetPosition()->GetTypeOfPosition() == SMDS_TOP_VERTEX &&
helper.IsClosedEdge( fromE ))
{
if ( fabs(u-f) < fabs(u-l)) c->D1( l, p, dv );
else c->D1( f, p, dv );
if ( o == TopAbs_REVERSED )
dv.Reverse();
gp_Vec dir2 = norm ^ dv;
dir = dir.Normalized() + dir2.Normalized();
}
return dir.XYZ();
}
//--------------------------------------------------------------------------------
gp_XYZ getFaceDir( const TopoDS_Face& F, const TopoDS_Vertex& fromV,
const SMDS_MeshNode* node, SMESH_MesherHelper& helper,
bool& ok, double* cosin)
{
TopoDS_Face faceFrw = F;
faceFrw.Orientation( TopAbs_FORWARD );
double f,l; TopLoc_Location loc;
TopoDS_Edge edges[2]; // sharing a vertex
int nbEdges = 0;
{
TopoDS_Vertex VV[2];
TopExp_Explorer exp( faceFrw, TopAbs_EDGE );
for ( ; exp.More() && nbEdges < 2; exp.Next() )
{
const TopoDS_Edge& e = TopoDS::Edge( exp.Current() );
if ( SMESH_Algo::isDegenerated( e )) continue;
TopExp::Vertices( e, VV[0], VV[1], /*CumOri=*/true );
if ( VV[1].IsSame( fromV )) {
nbEdges += edges[ 0 ].IsNull();
edges[ 0 ] = e;
}
else if ( VV[0].IsSame( fromV )) {
nbEdges += edges[ 1 ].IsNull();
edges[ 1 ] = e;
}
}
}
gp_XYZ dir(0,0,0), edgeDir[2];
if ( nbEdges == 2 )
{
// get dirs of edges going fromV
ok = true;
for ( size_t i = 0; i < nbEdges && ok; ++i )
{
edgeDir[i] = getEdgeDir( edges[i], fromV );
double size2 = edgeDir[i].SquareModulus();
if (( ok = size2 > numeric_limits<double>::min() ))
edgeDir[i] /= sqrt( size2 );
}
if ( !ok ) return dir;
// get angle between the 2 edges
gp_Vec faceNormal;
double angle = helper.GetAngle( edges[0], edges[1], faceFrw, fromV, &faceNormal );
if ( Abs( angle ) < 5 * M_PI/180 )
{
dir = ( faceNormal.XYZ() ^ edgeDir[0].Reversed()) + ( faceNormal.XYZ() ^ edgeDir[1] );
}
else
{
dir = edgeDir[0] + edgeDir[1];
if ( angle < 0 )
dir.Reverse();
}
if ( cosin ) {
double angle = gp_Vec( edgeDir[0] ).Angle( dir );
*cosin = Cos( angle );
}
}
else if ( nbEdges == 1 )
{
dir = getFaceDir( faceFrw, edges[ edges[0].IsNull() ], node, helper, ok );
if ( cosin ) *cosin = 1.;
}
else
{
ok = false;
}
return dir;
}
//================================================================================
/*!
* \brief Finds concave VERTEXes of a FACE
*/
//================================================================================
bool getConcaveVertices( const TopoDS_Face& F,
SMESH_MesherHelper& helper,
set< TGeomID >* vertices = 0)
{
// check angles at VERTEXes
TError error;
TSideVector wires = StdMeshers_FaceSide::GetFaceWires( F, *helper.GetMesh(), 0, error );
for ( size_t iW = 0; iW < wires.size(); ++iW )
{
const int nbEdges = wires[iW]->NbEdges();
if ( nbEdges < 2 && SMESH_Algo::isDegenerated( wires[iW]->Edge(0)))
continue;
for ( int iE1 = 0; iE1 < nbEdges; ++iE1 )
{
if ( SMESH_Algo::isDegenerated( wires[iW]->Edge( iE1 ))) continue;
int iE2 = ( iE1 + 1 ) % nbEdges;
while ( SMESH_Algo::isDegenerated( wires[iW]->Edge( iE2 )))
iE2 = ( iE2 + 1 ) % nbEdges;
TopoDS_Vertex V = wires[iW]->FirstVertex( iE2 );
double angle = helper.GetAngle( wires[iW]->Edge( iE1 ),
wires[iW]->Edge( iE2 ), F, V );
if ( angle < -5. * M_PI / 180. )
{
if ( !vertices )
return true;
vertices->insert( helper.GetMeshDS()->ShapeToIndex( V ));
}
}
}
return vertices ? !vertices->empty() : false;
}
//================================================================================
/*!
* \brief Returns true if a FACE is bound by a concave EDGE
*/
//================================================================================
bool isConcave( const TopoDS_Face& F,
SMESH_MesherHelper& helper,
set< TGeomID >* vertices = 0 )
{
bool isConcv = false;
// if ( helper.Count( F, TopAbs_WIRE, /*useMap=*/false) > 1 )
// return true;
gp_Vec2d drv1, drv2;
gp_Pnt2d p;
TopExp_Explorer eExp( F.Oriented( TopAbs_FORWARD ), TopAbs_EDGE );
for ( ; eExp.More(); eExp.Next() )
{
const TopoDS_Edge& E = TopoDS::Edge( eExp.Current() );
if ( SMESH_Algo::isDegenerated( E )) continue;
// check if 2D curve is concave
BRepAdaptor_Curve2d curve( E, F );
const int nbIntervals = curve.NbIntervals( GeomAbs_C2 );
TColStd_Array1OfReal intervals(1, nbIntervals + 1 );
curve.Intervals( intervals, GeomAbs_C2 );
bool isConvex = true;
for ( int i = 1; i <= nbIntervals && isConvex; ++i )
{
double u1 = intervals( i );
double u2 = intervals( i+1 );
curve.D2( 0.5*( u1+u2 ), p, drv1, drv2 );
double cross = drv2 ^ drv1;
if ( E.Orientation() == TopAbs_REVERSED )
cross = -cross;
isConvex = ( cross > 0.1 ); //-1e-9 );
}
if ( !isConvex )
{
//cout << "Concave FACE " << helper.GetMeshDS()->ShapeToIndex( F ) << endl;
isConcv = true;
if ( vertices )
break;
else
return true;
}
}
// check angles at VERTEXes
if ( getConcaveVertices( F, helper, vertices ))
isConcv = true;
return isConcv;
}
//================================================================================
/*!
* \brief Computes mimimal distance of face in-FACE nodes from an EDGE
* \param [in] face - the mesh face to treat
* \param [in] nodeOnEdge - a node on the EDGE
* \param [out] faceSize - the computed distance
* \return bool - true if faceSize computed
*/
//================================================================================
bool getDistFromEdge( const SMDS_MeshElement* face,
const SMDS_MeshNode* nodeOnEdge,
double & faceSize )
{
faceSize = Precision::Infinite();
bool done = false;
int nbN = face->NbCornerNodes();
int iOnE = face->GetNodeIndex( nodeOnEdge );
int iNext[2] = { SMESH_MesherHelper::WrapIndex( iOnE+1, nbN ),
SMESH_MesherHelper::WrapIndex( iOnE-1, nbN ) };
const SMDS_MeshNode* nNext[2] = { face->GetNode( iNext[0] ),
face->GetNode( iNext[1] ) };
gp_XYZ segVec, segEnd = SMESH_TNodeXYZ( nodeOnEdge ); // segment on EDGE
double segLen = -1.;
// look for two neighbor not in-FACE nodes of face
for ( int i = 0; i < 2; ++i )
{
if ( nNext[i]->GetPosition()->GetDim() != 2 &&
nNext[i]->GetID() < nodeOnEdge->GetID() )
{
// look for an in-FACE node
for ( int iN = 0; iN < nbN; ++iN )
{
if ( iN == iOnE || iN == iNext[i] )
continue;
SMESH_TNodeXYZ pInFace = face->GetNode( iN );
gp_XYZ v = pInFace - segEnd;
if ( segLen < 0 )
{
segVec = SMESH_TNodeXYZ( nNext[i] ) - segEnd;
segLen = segVec.Modulus();
}
double distToSeg = v.Crossed( segVec ).Modulus() / segLen;
faceSize = Min( faceSize, distToSeg );
done = true;
}
segLen = -1;
}
}
return done;
}
//================================================================================
/*!
* \brief Return direction of axis or revolution of a surface
*/
//================================================================================
bool getRovolutionAxis( const Adaptor3d_Surface& surface,
gp_Dir & axis )
{
switch ( surface.GetType() ) {
case GeomAbs_Cone:
{
gp_Cone cone = surface.Cone();
axis = cone.Axis().Direction();
break;
}
case GeomAbs_Sphere:
{
gp_Sphere sphere = surface.Sphere();
axis = sphere.Position().Direction();
break;
}
case GeomAbs_SurfaceOfRevolution:
{
axis = surface.AxeOfRevolution().Direction();
break;
}
//case GeomAbs_SurfaceOfExtrusion:
case GeomAbs_OffsetSurface:
{
Handle(Adaptor3d_HSurface) base = surface.BasisSurface();
return getRovolutionAxis( base->Surface(), axis );
}
default: return false;
}
return true;
}
//--------------------------------------------------------------------------------
// DEBUG. Dump intermediate node positions into a python script
// HOWTO use: run python commands written in a console to see
// construction steps of viscous layers
#ifdef __myDEBUG
ofstream* py;
int theNbPyFunc;
struct PyDump {
PyDump(SMESH_Mesh& m) {
int tag = 3 + m.GetId();
const char* fname = "/tmp/viscous.py";
cout << "execfile('"<<fname<<"')"<<endl;
py = new ofstream(fname);
*py << "import SMESH" << endl
<< "from salome.smesh import smeshBuilder" << endl
<< "smesh = smeshBuilder.New(salome.myStudy)" << endl
<< "meshSO = smesh.GetCurrentStudy().FindObjectID('0:1:2:" << tag <<"')" << endl
<< "mesh = smesh.Mesh( meshSO.GetObject() )"<<endl;
theNbPyFunc = 0;
}
void Finish() {
if (py) {
*py << "mesh.GroupOnFilter(SMESH.VOLUME,'Viscous Prisms',"
"smesh.GetFilter(SMESH.VOLUME,SMESH.FT_ElemGeomType,'=',SMESH.Geom_PENTA))"<<endl;
*py << "mesh.GroupOnFilter(SMESH.VOLUME,'Neg Volumes',"
"smesh.GetFilter(SMESH.VOLUME,SMESH.FT_Volume3D,'<',0))"<<endl;
}
delete py; py=0;
}
~PyDump() { Finish(); cout << "NB FUNCTIONS: " << theNbPyFunc << endl; }
};
#define dumpFunction(f) { _dumpFunction(f, __LINE__);}
#define dumpMove(n) { _dumpMove(n, __LINE__);}
#define dumpMoveComm(n,txt) { _dumpMove(n, __LINE__, txt);}
#define dumpCmd(txt) { _dumpCmd(txt, __LINE__);}
void _dumpFunction(const string& fun, int ln)
{ if (py) *py<< "def "<<fun<<"(): # "<< ln <<endl; cout<<fun<<"()"<<endl; ++theNbPyFunc; }
void _dumpMove(const SMDS_MeshNode* n, int ln, const char* txt="")
{ if (py) *py<< " mesh.MoveNode( "<<n->GetID()<< ", "<< n->X()
<< ", "<<n->Y()<<", "<< n->Z()<< ")\t\t # "<< ln <<" "<< txt << endl; }
void _dumpCmd(const string& txt, int ln)
{ if (py) *py<< " "<<txt<<" # "<< ln <<endl; }
void dumpFunctionEnd()
{ if (py) *py<< " return"<< endl; }
void dumpChangeNodes( const SMDS_MeshElement* f )
{ if (py) { *py<< " mesh.ChangeElemNodes( " << f->GetID()<<", [";
for ( int i=1; i < f->NbNodes(); ++i ) *py << f->GetNode(i-1)->GetID()<<", ";
*py << f->GetNode( f->NbNodes()-1 )->GetID() << " ])"<< endl; }}
#define debugMsg( txt ) { cout << txt << " (line: " << __LINE__ << ")" << endl; }
#else
struct PyDump { PyDump(SMESH_Mesh&) {} void Finish() {} };
#define dumpFunction(f) f
#define dumpMove(n)
#define dumpMoveComm(n,txt)
#define dumpCmd(txt)
#define dumpFunctionEnd()
#define dumpChangeNodes(f)
#define debugMsg( txt ) {}
#endif
}
using namespace VISCOUS_3D;
//================================================================================
/*!
* \brief Constructor of _ViscousBuilder
*/
//================================================================================
_ViscousBuilder::_ViscousBuilder()
{
_error = SMESH_ComputeError::New(COMPERR_OK);
_tmpFaceID = 0;
}
//================================================================================
/*!
* \brief Stores error description and returns false
*/
//================================================================================
bool _ViscousBuilder::error(const string& text, int solidId )
{
const string prefix = string("Viscous layers builder: ");
_error->myName = COMPERR_ALGO_FAILED;
_error->myComment = prefix + text;
if ( _mesh )
{
SMESH_subMesh* sm = _mesh->GetSubMeshContaining( solidId );
if ( !sm && !_sdVec.empty() )
sm = _mesh->GetSubMeshContaining( solidId = _sdVec[0]._index );
if ( sm && sm->GetSubShape().ShapeType() == TopAbs_SOLID )
{
SMESH_ComputeErrorPtr& smError = sm->GetComputeError();
if ( smError && smError->myAlgo )
_error->myAlgo = smError->myAlgo;
smError = _error;
sm->ComputeStateEngine( SMESH_subMesh::CHECK_COMPUTE_STATE );
}
// set KO to all solids
for ( size_t i = 0; i < _sdVec.size(); ++i )
{
if ( _sdVec[i]._index == solidId )
continue;
sm = _mesh->GetSubMesh( _sdVec[i]._solid );
if ( !sm->IsEmpty() )
continue;
SMESH_ComputeErrorPtr& smError = sm->GetComputeError();
if ( !smError || smError->IsOK() )
{
smError = SMESH_ComputeError::New( COMPERR_ALGO_FAILED, prefix + "failed");
sm->ComputeStateEngine( SMESH_subMesh::CHECK_COMPUTE_STATE );
}
}
}
makeGroupOfLE(); // debug
return false;
}
//================================================================================
/*!
* \brief At study restoration, restore event listeners used to clear an inferior
* dim sub-mesh modified by viscous layers
*/
//================================================================================
void _ViscousBuilder::RestoreListeners()
{
// TODO
}
//================================================================================
/*!
* \brief computes SMESH_ProxyMesh::SubMesh::_n2n
*/
//================================================================================
bool _ViscousBuilder::MakeN2NMap( _MeshOfSolid* pm )
{
SMESH_subMesh* solidSM = pm->mySubMeshes.front();
TopExp_Explorer fExp( solidSM->GetSubShape(), TopAbs_FACE );
for ( ; fExp.More(); fExp.Next() )
{
SMESHDS_SubMesh* srcSmDS = pm->GetMeshDS()->MeshElements( fExp.Current() );
const SMESH_ProxyMesh::SubMesh* prxSmDS = pm->GetProxySubMesh( fExp.Current() );
if ( !srcSmDS || !prxSmDS || !srcSmDS->NbElements() || !prxSmDS->NbElements() )
continue;
if ( srcSmDS->GetElements()->next() == prxSmDS->GetElements()->next())
continue;
if ( srcSmDS->NbElements() != prxSmDS->NbElements() )
return error( "Different nb elements in a source and a proxy sub-mesh", solidSM->GetId());
SMDS_ElemIteratorPtr srcIt = srcSmDS->GetElements();
SMDS_ElemIteratorPtr prxIt = prxSmDS->GetElements();
while( prxIt->more() )
{
const SMDS_MeshElement* fSrc = srcIt->next();
const SMDS_MeshElement* fPrx = prxIt->next();
if ( fSrc->NbNodes() != fPrx->NbNodes())
return error( "Different elements in a source and a proxy sub-mesh", solidSM->GetId());
for ( int i = 0 ; i < fPrx->NbNodes(); ++i )
pm->setNode2Node( fSrc->GetNode(i), fPrx->GetNode(i), prxSmDS );
}
}
pm->_n2nMapComputed = true;
return true;
}
//================================================================================
/*!
* \brief Does its job
*/
//================================================================================
SMESH_ComputeErrorPtr _ViscousBuilder::Compute(SMESH_Mesh& theMesh,
const TopoDS_Shape& theShape)
{
// TODO: set priority of solids during Gen::Compute()
_mesh = & theMesh;
// check if proxy mesh already computed
TopExp_Explorer exp( theShape, TopAbs_SOLID );
if ( !exp.More() )
return error("No SOLID's in theShape"), _error;
if ( _ViscousListener::GetSolidMesh( _mesh, exp.Current(), /*toCreate=*/false))
return SMESH_ComputeErrorPtr(); // everything already computed
PyDump debugDump( theMesh );
// TODO: ignore already computed SOLIDs
if ( !findSolidsWithLayers())
return _error;
if ( !findFacesWithLayers() )
return _error;
for ( size_t i = 0; i < _sdVec.size(); ++i )
{
if ( ! makeLayer(_sdVec[i]) )
return _error;
if ( _sdVec[i]._n2eMap.size() == 0 )
continue;
if ( ! inflate(_sdVec[i]) )
return _error;
if ( ! refine(_sdVec[i]) )
return _error;
}
if ( !shrink() )
return _error;
addBoundaryElements();
makeGroupOfLE(); // debug
debugDump.Finish();
return _error;
}
//================================================================================
/*!
* \brief Check validity of hypotheses
*/
//================================================================================
SMESH_ComputeErrorPtr _ViscousBuilder::CheckHypotheses( SMESH_Mesh& mesh,
const TopoDS_Shape& shape )
{
_mesh = & mesh;
if ( _ViscousListener::GetSolidMesh( _mesh, shape, /*toCreate=*/false))
return SMESH_ComputeErrorPtr(); // everything already computed
findSolidsWithLayers();
bool ok = findFacesWithLayers( true );
// remove _MeshOfSolid's of _SolidData's
for ( size_t i = 0; i < _sdVec.size(); ++i )
_ViscousListener::RemoveSolidMesh( _mesh, _sdVec[i]._solid );
if ( !ok )
return _error;
return SMESH_ComputeErrorPtr();
}
//================================================================================
/*!
* \brief Finds SOLIDs to compute using viscous layers. Fills _sdVec
*/
//================================================================================
bool _ViscousBuilder::findSolidsWithLayers()
{
// get all solids
TopTools_IndexedMapOfShape allSolids;
TopExp::MapShapes( _mesh->GetShapeToMesh(), TopAbs_SOLID, allSolids );
_sdVec.reserve( allSolids.Extent());
SMESH_Gen* gen = _mesh->GetGen();
SMESH_HypoFilter filter;
for ( int i = 1; i <= allSolids.Extent(); ++i )
{
// find StdMeshers_ViscousLayers hyp assigned to the i-th solid
SMESH_Algo* algo = gen->GetAlgo( *_mesh, allSolids(i) );
if ( !algo ) continue;
// TODO: check if algo is hidden
const list <const SMESHDS_Hypothesis *> & allHyps =
algo->GetUsedHypothesis(*_mesh, allSolids(i), /*ignoreAuxiliary=*/false);
_SolidData* soData = 0;
list< const SMESHDS_Hypothesis *>::const_iterator hyp = allHyps.begin();
const StdMeshers_ViscousLayers* viscHyp = 0;
for ( ; hyp != allHyps.end(); ++hyp )
if ( viscHyp = dynamic_cast<const StdMeshers_ViscousLayers*>( *hyp ))
{
TopoDS_Shape hypShape;
filter.Init( filter.Is( viscHyp ));
_mesh->GetHypothesis( allSolids(i), filter, true, &hypShape );
if ( !soData )
{
_MeshOfSolid* proxyMesh = _ViscousListener::GetSolidMesh( _mesh,
allSolids(i),
/*toCreate=*/true);
_sdVec.push_back( _SolidData( allSolids(i), proxyMesh ));
soData = & _sdVec.back();
soData->_index = getMeshDS()->ShapeToIndex( allSolids(i));
}
soData->_hyps.push_back( viscHyp );
soData->_hypShapes.push_back( hypShape );
}
}
if ( _sdVec.empty() )
return error
( SMESH_Comment(StdMeshers_ViscousLayers::GetHypType()) << " hypothesis not found",0);
return true;
}
//================================================================================
/*!
* \brief
*/
//================================================================================
bool _ViscousBuilder::findFacesWithLayers(const bool onlyWith)
{
SMESH_MesherHelper helper( *_mesh );
TopExp_Explorer exp;
TopTools_IndexedMapOfShape solids;
// collect all faces-to-ignore defined by hyp
for ( size_t i = 0; i < _sdVec.size(); ++i )
{
solids.Add( _sdVec[i]._solid );
// get faces-to-ignore defined by each hyp
typedef const StdMeshers_ViscousLayers* THyp;
typedef std::pair< set<TGeomID>, THyp > TFacesOfHyp;
list< TFacesOfHyp > ignoreFacesOfHyps;
list< THyp >::iterator hyp = _sdVec[i]._hyps.begin();
list< TopoDS_Shape >::iterator hypShape = _sdVec[i]._hypShapes.begin();
for ( ; hyp != _sdVec[i]._hyps.end(); ++hyp, ++hypShape )
{
ignoreFacesOfHyps.push_back( TFacesOfHyp( set<TGeomID>(), *hyp ));
getIgnoreFaces( _sdVec[i]._solid, *hyp, *hypShape, ignoreFacesOfHyps.back().first );
}
// fill _SolidData::_face2hyp and check compatibility of hypotheses
const int nbHyps = _sdVec[i]._hyps.size();
if ( nbHyps > 1 )
{
// check if two hypotheses define different parameters for the same FACE
list< TFacesOfHyp >::iterator igFacesOfHyp;
for ( exp.Init( _sdVec[i]._solid, TopAbs_FACE ); exp.More(); exp.Next() )
{
const TGeomID faceID = getMeshDS()->ShapeToIndex( exp.Current() );
THyp hyp = 0;
igFacesOfHyp = ignoreFacesOfHyps.begin();
for ( ; igFacesOfHyp != ignoreFacesOfHyps.end(); ++igFacesOfHyp )
if ( ! igFacesOfHyp->first.count( faceID ))
{
if ( hyp )
return error(SMESH_Comment("Several hypotheses define "
"Viscous Layers on the face #") << faceID );
hyp = igFacesOfHyp->second;
}
if ( hyp )
_sdVec[i]._face2hyp.insert( make_pair( faceID, hyp ));
else
_sdVec[i]._ignoreFaceIds.insert( faceID );
}
// check if two hypotheses define different number of viscous layers for
// adjacent faces of a solid
set< int > nbLayersSet;
igFacesOfHyp = ignoreFacesOfHyps.begin();
for ( ; igFacesOfHyp != ignoreFacesOfHyps.end(); ++igFacesOfHyp )
{
nbLayersSet.insert( igFacesOfHyp->second->GetNumberLayers() );
}
if ( nbLayersSet.size() > 1 )
{
for ( exp.Init( _sdVec[i]._solid, TopAbs_EDGE ); exp.More(); exp.Next() )
{
PShapeIteratorPtr fIt = helper.GetAncestors( exp.Current(), *_mesh, TopAbs_FACE );
THyp hyp1 = 0, hyp2 = 0;
while( const TopoDS_Shape* face = fIt->next() )
{
const TGeomID faceID = getMeshDS()->ShapeToIndex( *face );
map< TGeomID, THyp >::iterator f2h = _sdVec[i]._face2hyp.find( faceID );
if ( f2h != _sdVec[i]._face2hyp.end() )
{
( hyp1 ? hyp2 : hyp1 ) = f2h->second;
}
}
if ( hyp1 && hyp2 &&
hyp1->GetNumberLayers() != hyp2->GetNumberLayers() )
{
return error("Two hypotheses define different number of "
"viscous layers on adjacent faces");
}
}
}
} // if ( nbHyps > 1 )
else
{
_sdVec[i]._ignoreFaceIds.swap( ignoreFacesOfHyps.back().first );
}
} // loop on _sdVec
if ( onlyWith ) // is called to check hypotheses compatibility only
return true;
// fill _SolidData::_reversedFaceIds
for ( size_t i = 0; i < _sdVec.size(); ++i )
{
exp.Init( _sdVec[i]._solid.Oriented( TopAbs_FORWARD ), TopAbs_FACE );
for ( ; exp.More(); exp.Next() )
{
const TopoDS_Face& face = TopoDS::Face( exp.Current() );
const TGeomID faceID = getMeshDS()->ShapeToIndex( face );
if ( //!sdVec[i]._ignoreFaceIds.count( faceID ) &&
helper.NbAncestors( face, *_mesh, TopAbs_SOLID ) > 1 &&
helper.IsReversedSubMesh( face ))
{
_sdVec[i]._reversedFaceIds.insert( faceID );
}
}
}
// Find faces to shrink mesh on (solution 2 in issue 0020832);
TopTools_IndexedMapOfShape shapes;
for ( size_t i = 0; i < _sdVec.size(); ++i )
{
shapes.Clear();
TopExp::MapShapes(_sdVec[i]._solid, TopAbs_EDGE, shapes);
for ( int iE = 1; iE <= shapes.Extent(); ++iE )
{
const TopoDS_Shape& edge = shapes(iE);
// find 2 faces sharing an edge
TopoDS_Shape FF[2];
PShapeIteratorPtr fIt = helper.GetAncestors(edge, *_mesh, TopAbs_FACE);
while ( fIt->more())
{
const TopoDS_Shape* f = fIt->next();
if ( helper.IsSubShape( *f, _sdVec[i]._solid))
FF[ int( !FF[0].IsNull()) ] = *f;
}
if( FF[1].IsNull() ) continue; // seam edge can be shared by 1 FACE only
// check presence of layers on them
int ignore[2];
for ( int j = 0; j < 2; ++j )
ignore[j] = _sdVec[i]._ignoreFaceIds.count ( getMeshDS()->ShapeToIndex( FF[j] ));
if ( ignore[0] == ignore[1] )
continue; // nothing interesting
TopoDS_Shape fWOL = FF[ ignore[0] ? 0 : 1 ];
// check presence of layers on fWOL within an adjacent SOLID
bool collision = false;
PShapeIteratorPtr sIt = helper.GetAncestors( fWOL, *_mesh, TopAbs_SOLID );
while ( const TopoDS_Shape* solid = sIt->next() )
if ( !solid->IsSame( _sdVec[i]._solid ))
{
int iSolid = solids.FindIndex( *solid );
int iFace = getMeshDS()->ShapeToIndex( fWOL );
if ( iSolid > 0 && !_sdVec[ iSolid-1 ]._ignoreFaceIds.count( iFace ))
{
//_sdVec[i]._noShrinkShapes.insert( iFace );
//fWOL.Nullify();
collision = true;
}
}
// add edge to maps
if ( !fWOL.IsNull())
{
TGeomID edgeInd = getMeshDS()->ShapeToIndex( edge );
_sdVec[i]._shrinkShape2Shape.insert( make_pair( edgeInd, fWOL ));
if ( collision )
{
// _shrinkShape2Shape will be used to temporary inflate _LayerEdge's based
// on the edge but shrink won't be performed
_sdVec[i]._noShrinkShapes.insert( edgeInd );
}
}
}
}
// Exclude from _shrinkShape2Shape FACE's that can't be shrinked since
// the algo of the SOLID sharing the FACE does not support it
set< string > notSupportAlgos; notSupportAlgos.insert("Hexa_3D");
for ( size_t i = 0; i < _sdVec.size(); ++i )
{
map< TGeomID, TopoDS_Shape >::iterator e2f = _sdVec[i]._shrinkShape2Shape.begin();
for ( ; e2f != _sdVec[i]._shrinkShape2Shape.end(); ++e2f )
{
const TopoDS_Shape& fWOL = e2f->second;
const TGeomID edgeID = e2f->first;
bool notShrinkFace = false;
PShapeIteratorPtr soIt = helper.GetAncestors(fWOL, *_mesh, TopAbs_SOLID);
while ( soIt->more() )
{
const TopoDS_Shape* solid = soIt->next();
if ( _sdVec[i]._solid.IsSame( *solid )) continue;
SMESH_Algo* algo = _mesh->GetGen()->GetAlgo( *_mesh, *solid );
if ( !algo || !notSupportAlgos.count( algo->GetName() )) continue;
notShrinkFace = true;
size_t iSolid = 0;
for ( ; iSolid < _sdVec.size(); ++iSolid )
{
if ( _sdVec[iSolid]._solid.IsSame( *solid ) ) {
if ( _sdVec[iSolid]._shrinkShape2Shape.count( edgeID ))
notShrinkFace = false;
break;
}
}
if ( notShrinkFace )
{
_sdVec[i]._noShrinkShapes.insert( edgeID );
// add VERTEXes of the edge in _noShrinkShapes
TopoDS_Shape edge = getMeshDS()->IndexToShape( edgeID );
for ( TopoDS_Iterator vIt( edge ); vIt.More(); vIt.Next() )
_sdVec[i]._noShrinkShapes.insert( getMeshDS()->ShapeToIndex( vIt.Value() ));
// check if there is a collision with to-shrink-from EDGEs in iSolid
if ( iSolid == _sdVec.size() )
continue; // no VL in the solid
shapes.Clear();
TopExp::MapShapes( fWOL, TopAbs_EDGE, shapes);
for ( int iE = 1; iE <= shapes.Extent(); ++iE )
{
const TopoDS_Edge& E = TopoDS::Edge( shapes( iE ));
const TGeomID eID = getMeshDS()->ShapeToIndex( E );
if ( eID == edgeID ||
!_sdVec[iSolid]._shrinkShape2Shape.count( eID ) ||
_sdVec[i]._noShrinkShapes.count( eID ))
continue;
for ( int is1st = 0; is1st < 2; ++is1st )
{
TopoDS_Vertex V = helper.IthVertex( is1st, E );
if ( _sdVec[i]._noShrinkShapes.count( getMeshDS()->ShapeToIndex( V ) ))
{
// _sdVec[i]._noShrinkShapes.insert( eID );
// V = helper.IthVertex( !is1st, E );
// _sdVec[i]._noShrinkShapes.insert( getMeshDS()->ShapeToIndex( V ));
//iE = 0; // re-start the loop on EDGEs of fWOL
return error("No way to make a conformal mesh with "
"the given set of faces with layers", _sdVec[i]._index);
}
}
}
}
} // while ( soIt->more() )
} // loop on _sdVec[i]._shrinkShape2Shape
} // loop on _sdVec to fill in _SolidData::_noShrinkShapes
// Find the SHAPE along which to inflate _LayerEdge based on VERTEX
for ( size_t i = 0; i < _sdVec.size(); ++i )
{
shapes.Clear();
TopExp::MapShapes(_sdVec[i]._solid, TopAbs_VERTEX, shapes);
for ( int iV = 1; iV <= shapes.Extent(); ++iV )
{
const TopoDS_Shape& vertex = shapes(iV);
// find faces WOL sharing the vertex
vector< TopoDS_Shape > facesWOL;
int totalNbFaces = 0;
PShapeIteratorPtr fIt = helper.GetAncestors(vertex, *_mesh, TopAbs_FACE);
while ( fIt->more())
{
const TopoDS_Shape* f = fIt->next();
if ( helper.IsSubShape( *f, _sdVec[i]._solid ) )
{
totalNbFaces++;
const int fID = getMeshDS()->ShapeToIndex( *f );
if ( _sdVec[i]._ignoreFaceIds.count ( fID ) /*&&
!_sdVec[i]._noShrinkShapes.count( fID )*/)
facesWOL.push_back( *f );
}
}
if ( facesWOL.size() == totalNbFaces || facesWOL.empty() )
continue; // no layers at this vertex or no WOL
TGeomID vInd = getMeshDS()->ShapeToIndex( vertex );
switch ( facesWOL.size() )
{
case 1:
{
helper.SetSubShape( facesWOL[0] );
if ( helper.IsRealSeam( vInd )) // inflate along a seam edge?
{
TopoDS_Shape seamEdge;
PShapeIteratorPtr eIt = helper.GetAncestors(vertex, *_mesh, TopAbs_EDGE);
while ( eIt->more() && seamEdge.IsNull() )
{
const TopoDS_Shape* e = eIt->next();
if ( helper.IsRealSeam( *e ) )
seamEdge = *e;
}
if ( !seamEdge.IsNull() )
{
_sdVec[i]._shrinkShape2Shape.insert( make_pair( vInd, seamEdge ));
break;
}
}
_sdVec[i]._shrinkShape2Shape.insert( make_pair( vInd, facesWOL[0] ));
break;
}
case 2:
{
// find an edge shared by 2 faces
PShapeIteratorPtr eIt = helper.GetAncestors(vertex, *_mesh, TopAbs_EDGE);
while ( eIt->more())
{
const TopoDS_Shape* e = eIt->next();
if ( helper.IsSubShape( *e, facesWOL[0]) &&
helper.IsSubShape( *e, facesWOL[1]))
{
_sdVec[i]._shrinkShape2Shape.insert( make_pair( vInd, *e )); break;
}
}
break;
}
default:
return error("Not yet supported case", _sdVec[i]._index);
}
}
}
// add FACEs of other SOLIDs to _ignoreFaceIds
for ( size_t i = 0; i < _sdVec.size(); ++i )
{
shapes.Clear();
TopExp::MapShapes(_sdVec[i]._solid, TopAbs_FACE, shapes);
for ( exp.Init( _mesh->GetShapeToMesh(), TopAbs_FACE ); exp.More(); exp.Next() )
{
if ( !shapes.Contains( exp.Current() ))
_sdVec[i]._ignoreFaceIds.insert( getMeshDS()->ShapeToIndex( exp.Current() ));
}
}
return true;
}
//================================================================================
/*!
* \brief Finds FACEs w/o layers for a given SOLID by an hypothesis
*/
//================================================================================
void _ViscousBuilder::getIgnoreFaces(const TopoDS_Shape& solid,
const StdMeshers_ViscousLayers* hyp,
const TopoDS_Shape& hypShape,
set<TGeomID>& ignoreFaceIds)
{
TopExp_Explorer exp;
vector<TGeomID> ids = hyp->GetBndShapes();
if ( hyp->IsToIgnoreShapes() ) // FACEs to ignore are given
{
for ( size_t ii = 0; ii < ids.size(); ++ii )
{
const TopoDS_Shape& s = getMeshDS()->IndexToShape( ids[ii] );
if ( !s.IsNull() && s.ShapeType() == TopAbs_FACE )
ignoreFaceIds.insert( ids[ii] );
}
}
else // FACEs with layers are given
{
exp.Init( solid, TopAbs_FACE );
for ( ; exp.More(); exp.Next() )
{
TGeomID faceInd = getMeshDS()->ShapeToIndex( exp.Current() );
if ( find( ids.begin(), ids.end(), faceInd ) == ids.end() )
ignoreFaceIds.insert( faceInd );
}
}
// ignore internal FACEs if inlets and outlets are specified
if ( hyp->IsToIgnoreShapes() )
{
TopTools_IndexedDataMapOfShapeListOfShape solidsOfFace;
TopExp::MapShapesAndAncestors( hypShape,
TopAbs_FACE, TopAbs_SOLID, solidsOfFace);
for ( exp.Init( solid, TopAbs_FACE ); exp.More(); exp.Next() )
{
const TopoDS_Face& face = TopoDS::Face( exp.Current() );
if ( SMESH_MesherHelper::NbAncestors( face, *_mesh, TopAbs_SOLID ) < 2 )
continue;
int nbSolids = solidsOfFace.FindFromKey( face ).Extent();
if ( nbSolids > 1 )
ignoreFaceIds.insert( getMeshDS()->ShapeToIndex( face ));
}
}
}
//================================================================================
/*!
* \brief Create the inner surface of the viscous layer and prepare data for infation
*/
//================================================================================
bool _ViscousBuilder::makeLayer(_SolidData& data)
{
// get all sub-shapes to make layers on
set<TGeomID> subIds, faceIds;
subIds = data._noShrinkShapes;
TopExp_Explorer exp( data._solid, TopAbs_FACE );
for ( ; exp.More(); exp.Next() )
{
SMESH_subMesh* fSubM = _mesh->GetSubMesh( exp.Current() );
if ( ! data._ignoreFaceIds.count( fSubM->GetId() ))
{
faceIds.insert( fSubM->GetId() );
SMESH_subMeshIteratorPtr subIt = fSubM->getDependsOnIterator(/*includeSelf=*/true);
while ( subIt->more() )
subIds.insert( subIt->next()->GetId() );
}
}
// make a map to find new nodes on sub-shapes shared with other SOLID
map< TGeomID, TNode2Edge* >::iterator s2ne;
map< TGeomID, TopoDS_Shape >::iterator s2s = data._shrinkShape2Shape.begin();
for (; s2s != data._shrinkShape2Shape.end(); ++s2s )
{
TGeomID shapeInd = s2s->first;
for ( size_t i = 0; i < _sdVec.size(); ++i )
{
if ( _sdVec[i]._index == data._index ) continue;
map< TGeomID, TopoDS_Shape >::iterator s2s2 = _sdVec[i]._shrinkShape2Shape.find( shapeInd );
if ( s2s2 != _sdVec[i]._shrinkShape2Shape.end() &&
*s2s == *s2s2 && !_sdVec[i]._n2eMap.empty() )
{
data._s2neMap.insert( make_pair( shapeInd, &_sdVec[i]._n2eMap ));
break;
}
}
}
// Create temporary faces and _LayerEdge's
dumpFunction(SMESH_Comment("makeLayers_")<<data._index);
data._stepSize = Precision::Infinite();
data._stepSizeNodes[0] = 0;
SMESH_MesherHelper helper( *_mesh );
helper.SetSubShape( data._solid );
helper.SetElementsOnShape( true );
vector< const SMDS_MeshNode*> newNodes; // of a mesh face
TNode2Edge::iterator n2e2;
// collect _LayerEdge's of shapes they are based on
vector< _EdgesOnShape >& edgesByGeom = data._edgesOnShape;
const int nbShapes = getMeshDS()->MaxShapeIndex();
edgesByGeom.resize( nbShapes+1 );
// set data of _EdgesOnShape's
if ( SMESH_subMesh* sm = _mesh->GetSubMesh( data._solid ))
{
SMESH_subMeshIteratorPtr smIt = sm->getDependsOnIterator(/*includeSelf=*/false);
while ( smIt->more() )
{
sm = smIt->next();
if ( sm->GetSubShape().ShapeType() == TopAbs_FACE &&
!faceIds.count( sm->GetId() ))
continue;
setShapeData( edgesByGeom[ sm->GetId() ], sm, data );
}
}
// make _LayerEdge's
for ( set<TGeomID>::iterator id = faceIds.begin(); id != faceIds.end(); ++id )
{
const TopoDS_Face& F = TopoDS::Face( getMeshDS()->IndexToShape( *id ));
SMESH_subMesh* sm = _mesh->GetSubMesh( F );
SMESH_ProxyMesh::SubMesh* proxySub =
data._proxyMesh->getFaceSubM( F, /*create=*/true);
SMESHDS_SubMesh* smDS = sm->GetSubMeshDS();
if ( !smDS ) return error(SMESH_Comment("Not meshed face ") << *id, data._index );
SMDS_ElemIteratorPtr eIt = smDS->GetElements();
while ( eIt->more() )
{
const SMDS_MeshElement* face = eIt->next();
double faceMaxCosin = -1;
_LayerEdge* maxCosinEdge = 0;
int nbDegenNodes = 0;
newNodes.resize( face->NbCornerNodes() );
for ( size_t i = 0 ; i < newNodes.size(); ++i )
{
const SMDS_MeshNode* n = face->GetNode( i );
const int shapeID = n->getshapeId();
const bool onDegenShap = helper.IsDegenShape( shapeID );
const bool onDegenEdge = ( onDegenShap && n->GetPosition()->GetDim() == 1 );
if ( onDegenShap )
{
if ( onDegenEdge )
{
// substitute n on a degenerated EDGE with a node on a corresponding VERTEX
const TopoDS_Shape& E = getMeshDS()->IndexToShape( shapeID );
TopoDS_Vertex V = helper.IthVertex( 0, TopoDS::Edge( E ));
if ( const SMDS_MeshNode* vN = SMESH_Algo::VertexNode( V, getMeshDS() )) {
n = vN;
nbDegenNodes++;
}
}
else
{
nbDegenNodes++;
}
}
TNode2Edge::iterator n2e = data._n2eMap.insert( make_pair( n, (_LayerEdge*)0 )).first;
if ( !(*n2e).second )
{
// add a _LayerEdge
_LayerEdge* edge = new _LayerEdge();
edge->_nodes.push_back( n );
n2e->second = edge;
edgesByGeom[ shapeID ]._edges.push_back( edge );
const bool noShrink = data._noShrinkShapes.count( shapeID );
SMESH_TNodeXYZ xyz( n );
// set edge data or find already refined _LayerEdge and get data from it
if (( !noShrink ) &&
( n->GetPosition()->GetTypeOfPosition() != SMDS_TOP_FACE ) &&
(( s2ne = data._s2neMap.find( shapeID )) != data._s2neMap.end() ) &&
(( n2e2 = (*s2ne).second->find( n )) != s2ne->second->end() ))
{
_LayerEdge* foundEdge = (*n2e2).second;
gp_XYZ lastPos = edge->Copy( *foundEdge, edgesByGeom[ shapeID ], helper );
foundEdge->_pos.push_back( lastPos );
// location of the last node is modified and we restore it by foundEdge->_pos.back()
const_cast< SMDS_MeshNode* >
( edge->_nodes.back() )->setXYZ( xyz.X(), xyz.Y(), xyz.Z() );
}
else
{
if ( !noShrink )
{
edge->_nodes.push_back( helper.AddNode( xyz.X(), xyz.Y(), xyz.Z() ));
}
if ( !setEdgeData( *edge, edgesByGeom[ shapeID ], subIds, helper, data ))
return false;
}
dumpMove(edge->_nodes.back());
if ( edge->_cosin > faceMaxCosin )
{
faceMaxCosin = edge->_cosin;
maxCosinEdge = edge;
}
}
newNodes[ i ] = n2e->second->_nodes.back();
if ( onDegenEdge )
data._n2eMap.insert( make_pair( face->GetNode( i ), n2e->second ));
}
if ( newNodes.size() - nbDegenNodes < 2 )
continue;
// create a temporary face
const SMDS_MeshElement* newFace =
new _TmpMeshFace( newNodes, --_tmpFaceID, face->getshapeId() );
proxySub->AddElement( newFace );
// compute inflation step size by min size of element on a convex surface
if ( faceMaxCosin > theMinSmoothCosin )
limitStepSize( data, face, maxCosinEdge );
} // loop on 2D elements on a FACE
} // loop on FACEs of a SOLID
data._epsilon = 1e-7;
if ( data._stepSize < 1. )
data._epsilon *= data._stepSize;
if ( !findShapesToSmooth( data ))
return false;
// limit data._stepSize depending on surface curvature and fill data._convexFaces
limitStepSizeByCurvature( data ); // !!! it must be before node substitution in _Simplex
// Set target nodes into _Simplex and _LayerEdge's to _2NearEdges
TNode2Edge::iterator n2e;
const SMDS_MeshNode* nn[2];
for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
{
_EdgesOnShape& eos = data._edgesOnShape[iS];
vector< _LayerEdge* >& localEdges = eos._edges;
for ( size_t i = 0; i < localEdges.size(); ++i )
{
_LayerEdge* edge = localEdges[i];
if ( edge->IsOnEdge() )
{
// get neighbor nodes
bool hasData = ( edge->_2neibors->_edges[0] );
if ( hasData ) // _LayerEdge is a copy of another one
{
nn[0] = edge->_2neibors->srcNode(0);
nn[1] = edge->_2neibors->srcNode(1);
}
else if ( !findNeiborsOnEdge( edge, nn[0],nn[1], eos, data ))
{
return false;
}
// set neighbor _LayerEdge's
for ( int j = 0; j < 2; ++j )
{
if (( n2e = data._n2eMap.find( nn[j] )) == data._n2eMap.end() )
return error("_LayerEdge not found by src node", data._index);
edge->_2neibors->_edges[j] = n2e->second;
}
if ( !hasData )
edge->SetDataByNeighbors( nn[0], nn[1], eos, helper );
}
for ( size_t j = 0; j < edge->_simplices.size(); ++j )
{
_Simplex& s = edge->_simplices[j];
s._nNext = data._n2eMap[ s._nNext ]->_nodes.back();
s._nPrev = data._n2eMap[ s._nPrev ]->_nodes.back();
}
// For an _LayerEdge on a degenerated EDGE, copy some data from
// a corresponding _LayerEdge on a VERTEX
// (issue 52453, pb on a downloaded SampleCase2-Tet-netgen-mephisto.hdf)
if ( helper.IsDegenShape( edge->_nodes[0]->getshapeId() ))
{
// Generally we should not get here
if ( eos.ShapeType() != TopAbs_EDGE )
continue;
TopoDS_Vertex V = helper.IthVertex( 0, TopoDS::Edge( eos._shape ));
const SMDS_MeshNode* vN = SMESH_Algo::VertexNode( V, getMeshDS() );
if (( n2e = data._n2eMap.find( vN )) == data._n2eMap.end() )
continue;
const _LayerEdge* vEdge = n2e->second;
edge->_normal = vEdge->_normal;
edge->_lenFactor = vEdge->_lenFactor;
edge->_cosin = vEdge->_cosin;
}
}
}
// fix _LayerEdge::_2neibors on EDGEs to smooth
map< TGeomID,Handle(Geom_Curve)>::iterator e2c = data._edge2curve.begin();
for ( ; e2c != data._edge2curve.end(); ++e2c )
if ( !e2c->second.IsNull() )
{
if ( _EdgesOnShape* eos = data.GetShapeEdges( e2c->first ))
data.Sort2NeiborsOnEdge( eos->_edges );
}
dumpFunctionEnd();
return true;
}
//================================================================================
/*!
* \brief Compute inflation step size by min size of element on a convex surface
*/
//================================================================================
void _ViscousBuilder::limitStepSize( _SolidData& data,
const SMDS_MeshElement* face,
const _LayerEdge* maxCosinEdge )
{
int iN = 0;
double minSize = 10 * data._stepSize;
const int nbNodes = face->NbCornerNodes();
for ( int i = 0; i < nbNodes; ++i )
{
const SMDS_MeshNode* nextN = face->GetNode( SMESH_MesherHelper::WrapIndex( i+1, nbNodes ));
const SMDS_MeshNode* curN = face->GetNode( i );
if ( nextN->GetPosition()->GetTypeOfPosition() == SMDS_TOP_FACE ||
curN-> GetPosition()->GetTypeOfPosition() == SMDS_TOP_FACE )
{
double dist = SMESH_TNodeXYZ( curN ).Distance( nextN );
if ( dist < minSize )
minSize = dist, iN = i;
}
}
double newStep = 0.8 * minSize / maxCosinEdge->_lenFactor;
if ( newStep < data._stepSize )
{
data._stepSize = newStep;
data._stepSizeCoeff = 0.8 / maxCosinEdge->_lenFactor;
data._stepSizeNodes[0] = face->GetNode( iN );
data._stepSizeNodes[1] = face->GetNode( SMESH_MesherHelper::WrapIndex( iN+1, nbNodes ));
}
}
//================================================================================
/*!
* \brief Compute inflation step size by min size of element on a convex surface
*/
//================================================================================
void _ViscousBuilder::limitStepSize( _SolidData& data, const double minSize )
{
if ( minSize < data._stepSize )
{
data._stepSize = minSize;
if ( data._stepSizeNodes[0] )
{
double dist =
SMESH_TNodeXYZ(data._stepSizeNodes[0]).Distance(data._stepSizeNodes[1]);
data._stepSizeCoeff = data._stepSize / dist;
}
}
}
//================================================================================
/*!
* \brief Limit data._stepSize by evaluating curvature of shapes and fill data._convexFaces
*/
//================================================================================
void _ViscousBuilder::limitStepSizeByCurvature( _SolidData& data )
{
const int nbTestPnt = 5; // on a FACE sub-shape
BRepLProp_SLProps surfProp( 2, 1e-6 );
SMESH_MesherHelper helper( *_mesh );
data._convexFaces.clear();
for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
{
_EdgesOnShape& eof = data._edgesOnShape[iS];
if ( eof.ShapeType() != TopAbs_FACE ||
data._ignoreFaceIds.count( eof._shapeID ))
continue;
TopoDS_Face F = TopoDS::Face( eof._shape );
SMESH_subMesh * sm = eof._subMesh;
const TGeomID faceID = eof._shapeID;
BRepAdaptor_Surface surface( F, false );
surfProp.SetSurface( surface );
bool isTooCurved = false;
_ConvexFace cnvFace;
const double oriFactor = ( F.Orientation() == TopAbs_REVERSED ? +1. : -1. );
SMESH_subMeshIteratorPtr smIt = sm->getDependsOnIterator(/*includeSelf=*/true);
while ( smIt->more() )
{
sm = smIt->next();
const TGeomID subID = sm->GetId();
// find _LayerEdge's of a sub-shape
_EdgesOnShape* eos;
if (( eos = data.GetShapeEdges( subID )))
cnvFace._subIdToEOS.insert( make_pair( subID, eos ));
else
continue;
// check concavity and curvature and limit data._stepSize
const double minCurvature =
1. / ( eos->_hyp.GetTotalThickness() * ( 1+theThickToIntersection ));
size_t iStep = Max( 1, eos->_edges.size() / nbTestPnt );
for ( size_t i = 0; i < eos->_edges.size(); i += iStep )
{
gp_XY uv = helper.GetNodeUV( F, eos->_edges[ i ]->_nodes[0] );
surfProp.SetParameters( uv.X(), uv.Y() );
if ( !surfProp.IsCurvatureDefined() )
continue;
if ( surfProp.MaxCurvature() * oriFactor > minCurvature )
{
limitStepSize( data, 0.9 / surfProp.MaxCurvature() * oriFactor );
isTooCurved = true;
}
if ( surfProp.MinCurvature() * oriFactor > minCurvature )
{
limitStepSize( data, 0.9 / surfProp.MinCurvature() * oriFactor );
isTooCurved = true;
}
}
} // loop on sub-shapes of the FACE
if ( !isTooCurved ) continue;
_ConvexFace & convFace =
data._convexFaces.insert( make_pair( faceID, cnvFace )).first->second;
convFace._face = F;
convFace._normalsFixed = false;
// Fill _ConvexFace::_simplexTestEdges. These _LayerEdge's are used to detect
// prism distortion.
map< TGeomID, _EdgesOnShape* >::iterator id2eos = convFace._subIdToEOS.find( faceID );
if ( id2eos != convFace._subIdToEOS.end() && !id2eos->second->_edges.empty() )
{
// there are _LayerEdge's on the FACE it-self;
// select _LayerEdge's near EDGEs
_EdgesOnShape& eos = * id2eos->second;
for ( size_t i = 0; i < eos._edges.size(); ++i )
{
_LayerEdge* ledge = eos._edges[ i ];
for ( size_t j = 0; j < ledge->_simplices.size(); ++j )
if ( ledge->_simplices[j]._nNext->GetPosition()->GetDim() < 2 )
{
convFace._simplexTestEdges.push_back( ledge );
break;
}
}
}
else
{
// where there are no _LayerEdge's on a _ConvexFace,
// as e.g. on a fillet surface with no internal nodes - issue 22580,
// so that collision of viscous internal faces is not detected by check of
// intersection of _LayerEdge's with the viscous internal faces.
set< const SMDS_MeshNode* > usedNodes;
// look for _LayerEdge's with null _sWOL
id2eos = convFace._subIdToEOS.begin();
for ( ; id2eos != convFace._subIdToEOS.end(); ++id2eos )
{
_EdgesOnShape& eos = * id2eos->second;
if ( !eos._sWOL.IsNull() )
continue;
for ( size_t i = 0; i < eos._edges.size(); ++i )
{
_LayerEdge* ledge = eos._edges[ i ];
const SMDS_MeshNode* srcNode = ledge->_nodes[0];
if ( !usedNodes.insert( srcNode ).second ) continue;
_Simplex::GetSimplices( srcNode, ledge->_simplices, data._ignoreFaceIds, &data );
for ( size_t i = 0; i < ledge->_simplices.size(); ++i )
{
usedNodes.insert( ledge->_simplices[i]._nPrev );
usedNodes.insert( ledge->_simplices[i]._nNext );
}
convFace._simplexTestEdges.push_back( ledge );
}
}
}
} // loop on FACEs of data._solid
}
//================================================================================
/*!
* \brief Detect shapes (and _LayerEdge's on them) to smooth
*/
//================================================================================
bool _ViscousBuilder::findShapesToSmooth( _SolidData& data )
{
// define allowed thickness
computeGeomSize( data ); // compute data._geomSize
data._maxThickness = 0;
data._minThickness = 1e100;
list< const StdMeshers_ViscousLayers* >::iterator hyp = data._hyps.begin();
for ( ; hyp != data._hyps.end(); ++hyp )
{
data._maxThickness = Max( data._maxThickness, (*hyp)->GetTotalThickness() );
data._minThickness = Min( data._minThickness, (*hyp)->GetTotalThickness() );
}
const double tgtThick = /*Min( 0.5 * data._geomSize, */data._maxThickness;
// Find shapes needing smoothing; such a shape has _LayerEdge._normal on it's
// boundry inclined to the shape at a sharp angle
//list< TGeomID > shapesToSmooth;
TopTools_MapOfShape edgesOfSmooFaces;
SMESH_MesherHelper helper( *_mesh );
bool ok = true;
vector< _EdgesOnShape >& edgesByGeom = data._edgesOnShape;
data._nbShapesToSmooth = 0;
for ( size_t iS = 0; iS < edgesByGeom.size(); ++iS ) // check FACEs
{
_EdgesOnShape& eos = edgesByGeom[iS];
eos._toSmooth = false;
if ( eos._edges.empty() || eos.ShapeType() != TopAbs_FACE )
continue;
TopExp_Explorer eExp( edgesByGeom[iS]._shape, TopAbs_EDGE );
for ( ; eExp.More() && !eos._toSmooth; eExp.Next() )
{
TGeomID iE = getMeshDS()->ShapeToIndex( eExp.Current() );
vector<_LayerEdge*>& eE = edgesByGeom[ iE ]._edges;
if ( eE.empty() ) continue;
// TopLoc_Location loc;
// Handle(Geom_Surface) surface = BRep_Tool::Surface( TopoDS::Face( S ), loc );
// bool isPlane = GeomLib_IsPlanarSurface( surface ).IsPlanar();
//if ( eE[0]->_sWOL.IsNull() )
{
double faceSize;
for ( size_t i = 0; i < eE.size() && !eos._toSmooth; ++i )
if ( eE[i]->_cosin > theMinSmoothCosin )
{
SMDS_ElemIteratorPtr fIt = eE[i]->_nodes[0]->GetInverseElementIterator(SMDSAbs_Face);
while ( fIt->more() && !eos._toSmooth )
{
const SMDS_MeshElement* face = fIt->next();
if ( getDistFromEdge( face, eE[i]->_nodes[0], faceSize ))
eos._toSmooth = needSmoothing( eE[i]->_cosin, tgtThick, faceSize );
}
}
}
// else
// {
// const TopoDS_Face& F1 = TopoDS::Face( S );
// const TopoDS_Face& F2 = TopoDS::Face( eE[0]->_sWOL );
// const TopoDS_Edge& E = TopoDS::Edge( eExp.Current() );
// for ( size_t i = 0; i < eE.size() && !eos._toSmooth; ++i )
// {
// gp_Vec dir1 = getFaceDir( F1, E, eE[i]->_nodes[0], helper, ok );
// gp_Vec dir2 = getFaceDir( F2, E, eE[i]->_nodes[0], helper, ok );
// double angle = dir1.Angle( );
// double cosin = cos( angle );
// eos._toSmooth = ( cosin > theMinSmoothCosin );
// }
// }
}
if ( eos._toSmooth )
{
for ( eExp.ReInit(); eExp.More(); eExp.Next() )
edgesOfSmooFaces.Add( eExp.Current() );
data.PrepareEdgesToSmoothOnFace( &edgesByGeom[iS], /*substituteSrcNodes=*/false );
}
data._nbShapesToSmooth += eos._toSmooth;
} // check FACEs
for ( size_t iS = 0; iS < edgesByGeom.size(); ++iS ) // check EDGEs
{
_EdgesOnShape& eos = edgesByGeom[iS];
if ( eos._edges.empty() || eos.ShapeType() != TopAbs_EDGE ) continue;
if ( !eos._hyp.ToSmooth() ) continue;
const TopoDS_Edge& E = TopoDS::Edge( edgesByGeom[iS]._shape );
if ( SMESH_Algo::isDegenerated( E ) || !edgesOfSmooFaces.Contains( E ))
continue;
for ( TopoDS_Iterator vIt( E ); vIt.More() && !eos._toSmooth; vIt.Next() )
{
TGeomID iV = getMeshDS()->ShapeToIndex( vIt.Value() );
vector<_LayerEdge*>& eV = edgesByGeom[ iV ]._edges;
if ( eV.empty() ) continue;
gp_Vec eDir = getEdgeDir( E, TopoDS::Vertex( vIt.Value() ));
double angle = eDir.Angle( eV[0]->_normal );
double cosin = Cos( angle );
double cosinAbs = Abs( cosin );
if ( cosinAbs > theMinSmoothCosin )
{
// always smooth analytic EDGEs
eos._toSmooth = ! data.CurveForSmooth( E, eos, helper ).IsNull();
// compare tgtThick with the length of an end segment
SMDS_ElemIteratorPtr eIt = eV[0]->_nodes[0]->GetInverseElementIterator(SMDSAbs_Edge);
while ( eIt->more() && !eos._toSmooth )
{
const SMDS_MeshElement* endSeg = eIt->next();
if ( endSeg->getshapeId() == iS )
{
double segLen =
SMESH_TNodeXYZ( endSeg->GetNode(0) ).Distance( endSeg->GetNode(1 ));
eos._toSmooth = needSmoothing( cosinAbs, tgtThick, segLen );
}
}
}
}
data._nbShapesToSmooth += eos._toSmooth;
} // check EDGEs
// Reset _cosin if no smooth is allowed by the user
for ( size_t iS = 0; iS < edgesByGeom.size(); ++iS )
{
_EdgesOnShape& eos = edgesByGeom[iS];
if ( eos._edges.empty() ) continue;
if ( !eos._hyp.ToSmooth() )
for ( size_t i = 0; i < eos._edges.size(); ++i )
eos._edges[i]->SetCosin( 0 );
}
// int nbShapes = 0;
// for ( size_t iS = 0; iS < edgesByGeom.size(); ++iS )
// {
// nbShapes += ( edgesByGeom[iS]._edges.size() > 0 );
// }
// data._edgesOnShape.reserve( nbShapes );
// // first we put _LayerEdge's on shapes to smooth (EGDEs go first)
// vector< _LayerEdge* > edges;
// list< TGeomID >::iterator gIt = shapesToSmooth.begin();
// for ( ; gIt != shapesToSmooth.end(); ++gIt )
// {
// _EdgesOnShape& eos = edgesByGeom[ *gIt ];
// if ( eos._edges.empty() ) continue;
// eos._edges.swap( edges ); // avoid copying array
// eos._toSmooth = true;
// data._edgesOnShape.push_back( eos );
// data._edgesOnShape.back()._edges.swap( edges );
// }
// // then the rest _LayerEdge's
// for ( size_t iS = 0; iS < edgesByGeom.size(); ++iS )
// {
// _EdgesOnShape& eos = edgesByGeom[ *gIt ];
// if ( eos._edges.empty() ) continue;
// eos._edges.swap( edges ); // avoid copying array
// eos._toSmooth = false;
// data._edgesOnShape.push_back( eos );
// data._edgesOnShape.back()._edges.swap( edges );
// }
return ok;
}
//================================================================================
/*!
* \brief initialize data of _EdgesOnShape
*/
//================================================================================
void _ViscousBuilder::setShapeData( _EdgesOnShape& eos,
SMESH_subMesh* sm,
_SolidData& data )
{
if ( !eos._shape.IsNull() ||
sm->GetSubShape().ShapeType() == TopAbs_WIRE )
return;
SMESH_MesherHelper helper( *_mesh );
eos._subMesh = sm;
eos._shapeID = sm->GetId();
eos._shape = sm->GetSubShape();
if ( eos.ShapeType() == TopAbs_FACE )
eos._shape.Orientation( helper.GetSubShapeOri( data._solid, eos._shape ));
eos._toSmooth = false;
// set _SWOL
map< TGeomID, TopoDS_Shape >::const_iterator s2s =
data._shrinkShape2Shape.find( eos._shapeID );
if ( s2s != data._shrinkShape2Shape.end() )
eos._sWOL = s2s->second;
// set _hyp
if ( data._hyps.size() == 1 )
{
eos._hyp = data._hyps.back();
}
else
{
// compute average StdMeshers_ViscousLayers parameters
map< TGeomID, const StdMeshers_ViscousLayers* >::iterator f2hyp;
if ( eos.ShapeType() == TopAbs_FACE )
{
if (( f2hyp = data._face2hyp.find( eos._shapeID )) != data._face2hyp.end() )
eos._hyp = f2hyp->second;
}
else
{
PShapeIteratorPtr fIt = helper.GetAncestors( eos._shape, *_mesh, TopAbs_FACE );
while ( const TopoDS_Shape* face = fIt->next() )
{
TGeomID faceID = getMeshDS()->ShapeToIndex( *face );
if (( f2hyp = data._face2hyp.find( faceID )) != data._face2hyp.end() )
eos._hyp.Add( f2hyp->second );
}
}
}
// set _faceNormals
if ( ! eos._hyp.UseSurfaceNormal() )
{
if ( eos.ShapeType() == TopAbs_FACE ) // get normals to elements on a FACE
{
SMESHDS_SubMesh* smDS = sm->GetSubMeshDS();
eos._faceNormals.resize( smDS->NbElements() );
SMDS_ElemIteratorPtr eIt = smDS->GetElements();
for ( int iF = 0; eIt->more(); ++iF )
{
const SMDS_MeshElement* face = eIt->next();
if ( !SMESH_MeshAlgos::FaceNormal( face, eos._faceNormals[iF], /*normalized=*/true ))
eos._faceNormals[iF].SetCoord( 0,0,0 );
}
if ( !helper.IsReversedSubMesh( TopoDS::Face( eos._shape )))
for ( size_t iF = 0; iF < eos._faceNormals.size(); ++iF )
eos._faceNormals[iF].Reverse();
}
else // find EOS of adjacent FACEs
{
PShapeIteratorPtr fIt = helper.GetAncestors( eos._shape, *_mesh, TopAbs_FACE );
while ( const TopoDS_Shape* face = fIt->next() )
{
TGeomID faceID = getMeshDS()->ShapeToIndex( *face );
eos._faceEOS.push_back( & data._edgesOnShape[ faceID ]);
if ( eos._faceEOS.back()->_shape.IsNull() )
// avoid using uninitialised _shapeID in GetNormal()
eos._faceEOS.back()->_shapeID = faceID;
}
}
}
}
//================================================================================
/*!
* \brief Returns normal of a face
*/
//================================================================================
bool _EdgesOnShape::GetNormal( const SMDS_MeshElement* face, gp_Vec& norm )
{
bool ok = false;
const _EdgesOnShape* eos = 0;
if ( face->getshapeId() == _shapeID )
{
eos = this;
}
else
{
for ( size_t iF = 0; iF < _faceEOS.size() && !eos; ++iF )
if ( face->getshapeId() == _faceEOS[ iF ]->_shapeID )
eos = _faceEOS[ iF ];
}
if (( eos ) &&
( ok = ( face->getIdInShape() < eos->_faceNormals.size() )))
{
norm = eos->_faceNormals[ face->getIdInShape() ];
}
else if ( !eos )
{
debugMsg( "_EdgesOnShape::Normal() failed for face "<<face->GetID()
<< " on _shape #" << _shapeID );
}
return ok;
}
//================================================================================
/*!
* \brief Set data of _LayerEdge needed for smoothing
* \param subIds - ids of sub-shapes of a SOLID to take into account faces from
*/
//================================================================================
bool _ViscousBuilder::setEdgeData(_LayerEdge& edge,
_EdgesOnShape& eos,
const set<TGeomID>& subIds,
SMESH_MesherHelper& helper,
_SolidData& data)
{
const SMDS_MeshNode* node = edge._nodes[0]; // source node
edge._len = 0;
edge._2neibors = 0;
edge._curvature = 0;
// --------------------------
// Compute _normal and _cosin
// --------------------------
edge._cosin = 0;
edge._normal.SetCoord(0,0,0);
int totalNbFaces = 0;
TopoDS_Face F;
std::pair< TopoDS_Face, gp_XYZ > face2Norm[20];
gp_Vec geomNorm;
bool normOK = true;
const bool onShrinkShape = !eos._sWOL.IsNull();
const bool useGeometry = (( eos._hyp.UseSurfaceNormal() ) ||
( eos.ShapeType() != TopAbs_FACE && !onShrinkShape ));
// get geom FACEs the node lies on
//if ( useGeometry )
{
set<TGeomID> faceIds;
if ( eos.ShapeType() == TopAbs_FACE )
{
faceIds.insert( eos._shapeID );
}
else
{
SMDS_ElemIteratorPtr fIt = node->GetInverseElementIterator(SMDSAbs_Face);
while ( fIt->more() )
faceIds.insert( fIt->next()->getshapeId() );
}
set<TGeomID>::iterator id = faceIds.begin();
for ( ; id != faceIds.end(); ++id )
{
const TopoDS_Shape& s = getMeshDS()->IndexToShape( *id );
if ( s.IsNull() || s.ShapeType() != TopAbs_FACE || !subIds.count( *id ))
continue;
F = TopoDS::Face( s );
face2Norm[ totalNbFaces ].first = F;
totalNbFaces++;
}
}
// find _normal
if ( useGeometry )
{
if ( onShrinkShape ) // one of faces the node is on has no layers
{
if ( eos.SWOLType() == TopAbs_EDGE )
{
// inflate from VERTEX along EDGE
edge._normal = getEdgeDir( TopoDS::Edge( eos._sWOL ), TopoDS::Vertex( eos._shape ));
}
else if ( eos.ShapeType() == TopAbs_VERTEX )
{
// inflate from VERTEX along FACE
edge._normal = getFaceDir( TopoDS::Face( eos._sWOL ), TopoDS::Vertex( eos._shape ),
node, helper, normOK, &edge._cosin);
}
else
{
// inflate from EDGE along FACE
edge._normal = getFaceDir( TopoDS::Face( eos._sWOL ), TopoDS::Edge( eos._shape ),
node, helper, normOK);
}
}
// layers are on all faces of SOLID the node is on
else
{
int nbOkNorms = 0;
for ( int iF = 0; iF < totalNbFaces; ++iF )
{
F = TopoDS::Face( face2Norm[ iF ].first );
geomNorm = getFaceNormal( node, F, helper, normOK );
if ( !normOK ) continue;
nbOkNorms++;
if ( helper.GetSubShapeOri( data._solid, F ) != TopAbs_REVERSED )
geomNorm.Reverse();
face2Norm[ iF ].second = geomNorm.XYZ();
edge._normal += geomNorm.XYZ();
}
if ( nbOkNorms == 0 )
return error(SMESH_Comment("Can't get normal to node ") << node->GetID(), data._index);
if ( edge._normal.Modulus() < 1e-3 && nbOkNorms > 1 )
{
// opposite normals, re-get normals at shifted positions (IPAL 52426)
edge._normal.SetCoord( 0,0,0 );
for ( int iF = 0; iF < totalNbFaces; ++iF )
{
const TopoDS_Face& F = face2Norm[iF].first;
geomNorm = getFaceNormal( node, F, helper, normOK, /*shiftInside=*/true );
if ( helper.GetSubShapeOri( data._solid, F ) != TopAbs_REVERSED )
geomNorm.Reverse();
if ( normOK )
face2Norm[ iF ].second = geomNorm.XYZ();
edge._normal += face2Norm[ iF ].second;
}
}
if ( totalNbFaces < 3 )
{
//edge._normal /= totalNbFaces;
}
else
{
edge._normal = getWeigthedNormal( node, face2Norm, totalNbFaces );
}
}
}
else // !useGeometry - get _normal using surrounding mesh faces
{
set<TGeomID> faceIds;
SMDS_ElemIteratorPtr fIt = node->GetInverseElementIterator(SMDSAbs_Face);
while ( fIt->more() )
{
const SMDS_MeshElement* face = fIt->next();
if ( eos.GetNormal( face, geomNorm ))
{
if ( onShrinkShape && !faceIds.insert( face->getshapeId() ).second )
continue; // use only one mesh face on FACE
edge._normal += geomNorm.XYZ();
totalNbFaces++;
}
}
}
// compute _cosin
//if ( eos._hyp.UseSurfaceNormal() )
{
switch ( eos.ShapeType() )
{
case TopAbs_FACE: {
edge._cosin = 0;
break;
}
case TopAbs_EDGE: {
TopoDS_Edge E = TopoDS::Edge( eos._shape );
gp_Vec inFaceDir = getFaceDir( F, E, node, helper, normOK );
double angle = inFaceDir.Angle( edge._normal ); // [0,PI]
edge._cosin = Cos( angle );
//cout << "Cosin on EDGE " << edge._cosin << " node " << node->GetID() << endl;
break;
}
case TopAbs_VERTEX: {
if ( eos.SWOLType() != TopAbs_FACE ) { // else _cosin is set by getFaceDir()
TopoDS_Vertex V = TopoDS::Vertex( eos._shape );
gp_Vec inFaceDir = getFaceDir( F, V, node, helper, normOK );
double angle = inFaceDir.Angle( edge._normal ); // [0,PI]
edge._cosin = Cos( angle );
if ( totalNbFaces > 2 || helper.IsSeamShape( node->getshapeId() ))
for ( int iF = totalNbFaces-2; iF >=0; --iF )
{
F = face2Norm[ iF ].first;
inFaceDir = getFaceDir( F, V, node, helper, normOK=true );
if ( normOK ) {
double angle = inFaceDir.Angle( edge._normal );
edge._cosin = Max( edge._cosin, Cos( angle ));
}
}
}
//cout << "Cosin on VERTEX " << edge._cosin << " node " << node->GetID() << endl;
break;
}
default:
return error(SMESH_Comment("Invalid shape position of node ")<<node, data._index);
}
}
double normSize = edge._normal.SquareModulus();
if ( normSize < numeric_limits<double>::min() )
return error(SMESH_Comment("Bad normal at node ")<< node->GetID(), data._index );
edge._normal /= sqrt( normSize );
// TODO: if ( !normOK ) then get normal by mesh faces
// Set the rest data
// --------------------
if ( onShrinkShape )
{
SMDS_MeshNode* tgtNode = const_cast<SMDS_MeshNode*>( edge._nodes.back() );
if ( SMESHDS_SubMesh* sm = getMeshDS()->MeshElements( data._solid ))
sm->RemoveNode( tgtNode , /*isNodeDeleted=*/false );
// set initial position which is parameters on _sWOL in this case
if ( eos.SWOLType() == TopAbs_EDGE )
{
double u = helper.GetNodeU( TopoDS::Edge( eos._sWOL ), node, 0, &normOK );
edge._pos.push_back( gp_XYZ( u, 0, 0 ));
if ( edge._nodes.size() > 1 )
getMeshDS()->SetNodeOnEdge( tgtNode, TopoDS::Edge( eos._sWOL ), u );
}
else // TopAbs_FACE
{
gp_XY uv = helper.GetNodeUV( TopoDS::Face( eos._sWOL ), node, 0, &normOK );
edge._pos.push_back( gp_XYZ( uv.X(), uv.Y(), 0));
if ( edge._nodes.size() > 1 )
getMeshDS()->SetNodeOnFace( tgtNode, TopoDS::Face( eos._sWOL ), uv.X(), uv.Y() );
}
}
else
{
edge._pos.push_back( SMESH_TNodeXYZ( node ));
if ( eos.ShapeType() == TopAbs_FACE )
{
_Simplex::GetSimplices( node, edge._simplices, data._ignoreFaceIds, &data );
}
}
// Set neighbour nodes for a _LayerEdge based on EDGE
if ( eos.ShapeType() == TopAbs_EDGE /*||
( onShrinkShape && posType == SMDS_TOP_VERTEX && fabs( edge._cosin ) < 1e-10 )*/)
{
edge._2neibors = new _2NearEdges;
// target node instead of source ones will be set later
// if ( ! findNeiborsOnEdge( &edge,
// edge._2neibors->_nodes[0],
// edge._2neibors->_nodes[1], eos,
// data))
// return false;
// edge.SetDataByNeighbors( edge._2neibors->_nodes[0],
// edge._2neibors->_nodes[1],
// helper);
}
edge.SetCosin( edge._cosin ); // to update edge._lenFactor
return true;
}
//================================================================================
/*!
* \brief Return normal to a FACE at a node
* \param [in] n - node
* \param [in] face - FACE
* \param [in] helper - helper
* \param [out] isOK - true or false
* \param [in] shiftInside - to find normal at a position shifted inside the face
* \return gp_XYZ - normal
*/
//================================================================================
gp_XYZ _ViscousBuilder::getFaceNormal(const SMDS_MeshNode* node,
const TopoDS_Face& face,
SMESH_MesherHelper& helper,
bool& isOK,
bool shiftInside)
{
gp_XY uv;
if ( shiftInside )
{
// get a shifted position
gp_Pnt p = SMESH_TNodeXYZ( node );
gp_XYZ shift( 0,0,0 );
TopoDS_Shape S = helper.GetSubShapeByNode( node, helper.GetMeshDS() );
switch ( S.ShapeType() ) {
case TopAbs_VERTEX:
{
shift = getFaceDir( face, TopoDS::Vertex( S ), node, helper, isOK );
break;
}
case TopAbs_EDGE:
{
shift = getFaceDir( face, TopoDS::Edge( S ), node, helper, isOK );
break;
}
default:
isOK = false;
}
if ( isOK )
shift.Normalize();
p.Translate( shift * 1e-5 );
TopLoc_Location loc;
GeomAPI_ProjectPointOnSurf& projector = helper.GetProjector( face, loc, 1e-7 );
if ( !loc.IsIdentity() ) p.Transform( loc.Transformation().Inverted() );
projector.Perform( p );
if ( !projector.IsDone() || projector.NbPoints() < 1 )
{
isOK = false;
return p.XYZ();
}
Quantity_Parameter U,V;
projector.LowerDistanceParameters(U,V);
uv.SetCoord( U,V );
}
else
{
uv = helper.GetNodeUV( face, node, 0, &isOK );
}
gp_Dir normal;
isOK = false;
Handle(Geom_Surface) surface = BRep_Tool::Surface( face );
if ( !shiftInside &&
helper.IsDegenShape( node->getshapeId() ) &&
getFaceNormalAtSingularity( uv, face, helper, normal ))
{
isOK = true;
return normal.XYZ();
}
int pointKind = GeomLib::NormEstim( surface, uv, 1e-5, normal );
enum { REGULAR = 0, QUASYSINGULAR, CONICAL, IMPOSSIBLE };
if ( pointKind == IMPOSSIBLE &&
node->GetPosition()->GetDim() == 2 ) // node inside the FACE
{
// probably NormEstim() failed due to a too high tolerance
pointKind = GeomLib::NormEstim( surface, uv, 1e-20, normal );
isOK = ( pointKind < IMPOSSIBLE );
}
if ( pointKind < IMPOSSIBLE )
{
if ( pointKind != REGULAR &&
!shiftInside &&
node->GetPosition()->GetDim() < 2 ) // FACE boundary
{
gp_XYZ normShift = getFaceNormal( node, face, helper, isOK, /*shiftInside=*/true );
if ( normShift * normal.XYZ() < 0. )
normal = normShift;
}
isOK = true;
}
if ( !isOK ) // hard singularity, to call with shiftInside=true ?
{
const TGeomID faceID = helper.GetMeshDS()->ShapeToIndex( face );
SMDS_ElemIteratorPtr fIt = node->GetInverseElementIterator(SMDSAbs_Face);
while ( fIt->more() )
{
const SMDS_MeshElement* f = fIt->next();
if ( f->getshapeId() == faceID )
{
isOK = SMESH_MeshAlgos::FaceNormal( f, (gp_XYZ&) normal.XYZ(), /*normalized=*/true );
if ( isOK )
{
TopoDS_Face ff = face;
ff.Orientation( TopAbs_FORWARD );
if ( helper.IsReversedSubMesh( ff ))
normal.Reverse();
break;
}
}
}
}
return normal.XYZ();
}
//================================================================================
/*!
* \brief Try to get normal at a singularity of a surface basing on it's nature
*/
//================================================================================
bool _ViscousBuilder::getFaceNormalAtSingularity( const gp_XY& uv,
const TopoDS_Face& face,
SMESH_MesherHelper& helper,
gp_Dir& normal )
{
BRepAdaptor_Surface surface( face );
gp_Dir axis;
if ( !getRovolutionAxis( surface, axis ))
return false;
double f,l, d, du, dv;
f = surface.FirstUParameter();
l = surface.LastUParameter();
d = ( uv.X() - f ) / ( l - f );
du = ( d < 0.5 ? +1. : -1 ) * 1e-5 * ( l - f );
f = surface.FirstVParameter();
l = surface.LastVParameter();
d = ( uv.Y() - f ) / ( l - f );
dv = ( d < 0.5 ? +1. : -1 ) * 1e-5 * ( l - f );
gp_Dir refDir;
gp_Pnt2d testUV = uv;
enum { REGULAR = 0, QUASYSINGULAR, CONICAL, IMPOSSIBLE };
double tol = 1e-5;
Handle(Geom_Surface) geomsurf = surface.Surface().Surface();
for ( int iLoop = 0; true ; ++iLoop )
{
testUV.SetCoord( testUV.X() + du, testUV.Y() + dv );
if ( GeomLib::NormEstim( geomsurf, testUV, tol, refDir ) == REGULAR )
break;
if ( iLoop > 20 )
return false;
tol /= 10.;
}
if ( axis * refDir < 0. )
axis.Reverse();
normal = axis;
return true;
}
//================================================================================
/*!
* \brief Return a normal at a node weighted with angles taken by FACEs
* \param [in] n - the node
* \param [in] fId2Normal - FACE ids and normals
* \param [in] nbFaces - nb of FACEs meeting at the node
* \return gp_XYZ - computed normal
*/
//================================================================================
gp_XYZ _ViscousBuilder::getWeigthedNormal( const SMDS_MeshNode* n,
std::pair< TopoDS_Face, gp_XYZ > fId2Normal[],
int nbFaces )
{
gp_XYZ resNorm(0,0,0);
TopoDS_Shape V = SMESH_MesherHelper::GetSubShapeByNode( n, getMeshDS() );
if ( V.ShapeType() != TopAbs_VERTEX )
{
for ( int i = 0; i < nbFaces; ++i )
resNorm += fId2Normal[i].second;
return resNorm;
}
// exclude equal normals
int nbUniqNorms = nbFaces;
for ( int i = 0; i < nbFaces; ++i ) {
for ( int j = i+1; j < nbFaces; ++j )
if ( fId2Normal[i].second.IsEqual( fId2Normal[j].second, 0.1 ))
{
fId2Normal[i].second.SetCoord( 0,0,0 );
--nbUniqNorms;
break;
}
}
for ( int i = 0; i < nbFaces; ++i )
resNorm += fId2Normal[i].second;
// assure that resNorm is visible by every FACE (IPAL0052675)
if ( nbUniqNorms > 3 )
{
bool change = false;
for ( int nbAttempts = 0; nbAttempts < nbFaces; ++nbAttempts)
{
for ( int i = 0; i < nbFaces; ++i )
if ( resNorm * fId2Normal[i].second < 0.5 )
{
resNorm += fId2Normal[i].second;
change = true;
}
if ( !change ) break;
}
}
// double angles[30];
// for ( int i = 0; i < nbFaces; ++i )
// {
// const TopoDS_Face& F = fId2Normal[i].first;
// // look for two EDGEs shared by F and other FACEs within fId2Normal
// TopoDS_Edge ee[2];
// int nbE = 0;
// PShapeIteratorPtr eIt = SMESH_MesherHelper::GetAncestors( V, *_mesh, TopAbs_EDGE );
// while ( const TopoDS_Shape* E = eIt->next() )
// {
// if ( !SMESH_MesherHelper::IsSubShape( *E, F ))
// continue;
// bool isSharedEdge = false;
// for ( int j = 0; j < nbFaces && !isSharedEdge; ++j )
// {
// if ( i == j ) continue;
// const TopoDS_Shape& otherF = fId2Normal[j].first;
// isSharedEdge = SMESH_MesherHelper::IsSubShape( *E, otherF );
// }
// if ( !isSharedEdge )
// continue;
// ee[ nbE ] = TopoDS::Edge( *E );
// ee[ nbE ].Orientation( SMESH_MesherHelper::GetSubShapeOri( F, *E ));
// if ( ++nbE == 2 )
// break;
// }
// // get an angle between the two EDGEs
// angles[i] = 0;
// if ( nbE < 1 ) continue;
// if ( nbE == 1 )
// {
// ee[ 1 ] == ee[ 0 ];
// }
// else
// {
// if ( !V.IsSame( SMESH_MesherHelper::IthVertex( 0, ee[ 1 ] )))
// std::swap( ee[0], ee[1] );
// }
// angles[i] = SMESH_MesherHelper::GetAngle( ee[0], ee[1], F, TopoDS::Vertex( V ));
// }
// // compute a weighted normal
// double sumAngle = 0;
// for ( int i = 0; i < nbFaces; ++i )
// {
// angles[i] = ( angles[i] > 2*M_PI ) ? 0 : M_PI - angles[i];
// sumAngle += angles[i];
// }
// for ( int i = 0; i < nbFaces; ++i )
// resNorm += angles[i] / sumAngle * fId2Normal[i].second;
return resNorm;
}
//================================================================================
/*!
* \brief Find 2 neigbor nodes of a node on EDGE
*/
//================================================================================
bool _ViscousBuilder::findNeiborsOnEdge(const _LayerEdge* edge,
const SMDS_MeshNode*& n1,
const SMDS_MeshNode*& n2,
_EdgesOnShape& eos,
_SolidData& data)
{
const SMDS_MeshNode* node = edge->_nodes[0];
const int shapeInd = eos._shapeID;
SMESHDS_SubMesh* edgeSM = 0;
if ( eos.ShapeType() == TopAbs_EDGE )
{
edgeSM = eos._subMesh->GetSubMeshDS();
if ( !edgeSM || edgeSM->NbElements() == 0 )
return error(SMESH_Comment("Not meshed EDGE ") << shapeInd, data._index);
}
int iN = 0;
n2 = 0;
SMDS_ElemIteratorPtr eIt = node->GetInverseElementIterator(SMDSAbs_Edge);
while ( eIt->more() && !n2 )
{
const SMDS_MeshElement* e = eIt->next();
const SMDS_MeshNode* nNeibor = e->GetNode( 0 );
if ( nNeibor == node ) nNeibor = e->GetNode( 1 );
if ( edgeSM )
{
if (!edgeSM->Contains(e)) continue;
}
else
{
TopoDS_Shape s = SMESH_MesherHelper::GetSubShapeByNode( nNeibor, getMeshDS() );
if ( !SMESH_MesherHelper::IsSubShape( s, eos._sWOL )) continue;
}
( iN++ ? n2 : n1 ) = nNeibor;
}
if ( !n2 )
return error(SMESH_Comment("Wrongly meshed EDGE ") << shapeInd, data._index);
return true;
}
//================================================================================
/*!
* \brief Set _curvature and _2neibors->_plnNorm by 2 neigbor nodes residing the same EDGE
*/
//================================================================================
void _LayerEdge::SetDataByNeighbors( const SMDS_MeshNode* n1,
const SMDS_MeshNode* n2,
const _EdgesOnShape& eos,
SMESH_MesherHelper& helper)
{
if ( eos.ShapeType() != TopAbs_EDGE )
return;
gp_XYZ pos = SMESH_TNodeXYZ( _nodes[0] );
gp_XYZ vec1 = pos - SMESH_TNodeXYZ( n1 );
gp_XYZ vec2 = pos - SMESH_TNodeXYZ( n2 );
// Set _curvature
double sumLen = vec1.Modulus() + vec2.Modulus();
_2neibors->_wgt[0] = 1 - vec1.Modulus() / sumLen;
_2neibors->_wgt[1] = 1 - vec2.Modulus() / sumLen;
double avgNormProj = 0.5 * ( _normal * vec1 + _normal * vec2 );
double avgLen = 0.5 * ( vec1.Modulus() + vec2.Modulus() );
if ( _curvature ) delete _curvature;
_curvature = _Curvature::New( avgNormProj, avgLen );
// if ( _curvature )
// debugMsg( _nodes[0]->GetID()
// << " CURV r,k: " << _curvature->_r<<","<<_curvature->_k
// << " proj = "<<avgNormProj<< " len = " << avgLen << "| lenDelta(0) = "
// << _curvature->lenDelta(0) );
// Set _plnNorm
if ( eos._sWOL.IsNull() )
{
TopoDS_Edge E = TopoDS::Edge( eos._shape );
// if ( SMESH_Algo::isDegenerated( E ))
// return;
gp_XYZ dirE = getEdgeDir( E, _nodes[0], helper );
gp_XYZ plnNorm = dirE ^ _normal;
double proj0 = plnNorm * vec1;
double proj1 = plnNorm * vec2;
if ( fabs( proj0 ) > 1e-10 || fabs( proj1 ) > 1e-10 )
{
if ( _2neibors->_plnNorm ) delete _2neibors->_plnNorm;
_2neibors->_plnNorm = new gp_XYZ( plnNorm.Normalized() );
}
}
}
//================================================================================
/*!
* \brief Copy data from a _LayerEdge of other SOLID and based on the same node;
* this and other _LayerEdge's are inflated along a FACE or an EDGE
*/
//================================================================================
gp_XYZ _LayerEdge::Copy( _LayerEdge& other,
_EdgesOnShape& eos,
SMESH_MesherHelper& helper )
{
_nodes = other._nodes;
_normal = other._normal;
_len = 0;
_lenFactor = other._lenFactor;
_cosin = other._cosin;
_2neibors = other._2neibors;
_curvature = 0; std::swap( _curvature, other._curvature );
_2neibors = 0; std::swap( _2neibors, other._2neibors );
gp_XYZ lastPos( 0,0,0 );
if ( eos.SWOLType() == TopAbs_EDGE )
{
double u = helper.GetNodeU( TopoDS::Edge( eos._sWOL ), _nodes[0] );
_pos.push_back( gp_XYZ( u, 0, 0));
u = helper.GetNodeU( TopoDS::Edge( eos._sWOL ), _nodes.back() );
lastPos.SetX( u );
}
else // TopAbs_FACE
{
gp_XY uv = helper.GetNodeUV( TopoDS::Face( eos._sWOL ), _nodes[0]);
_pos.push_back( gp_XYZ( uv.X(), uv.Y(), 0));
uv = helper.GetNodeUV( TopoDS::Face( eos._sWOL ), _nodes.back() );
lastPos.SetX( uv.X() );
lastPos.SetY( uv.Y() );
}
return lastPos;
}
//================================================================================
/*!
* \brief Set _cosin and _lenFactor
*/
//================================================================================
void _LayerEdge::SetCosin( double cosin )
{
_cosin = cosin;
cosin = Abs( _cosin );
_lenFactor = ( /*0.1 < cosin &&*/ cosin < 1-1e-12 ) ? 1./sqrt(1-cosin*cosin) : 1.0;
}
//================================================================================
/*!
* \brief Fills a vector<_Simplex >
*/
//================================================================================
void _Simplex::GetSimplices( const SMDS_MeshNode* node,
vector<_Simplex>& simplices,
const set<TGeomID>& ingnoreShapes,
const _SolidData* dataToCheckOri,
const bool toSort)
{
simplices.clear();
SMDS_ElemIteratorPtr fIt = node->GetInverseElementIterator(SMDSAbs_Face);
while ( fIt->more() )
{
const SMDS_MeshElement* f = fIt->next();
const TGeomID shapeInd = f->getshapeId();
if ( ingnoreShapes.count( shapeInd )) continue;
const int nbNodes = f->NbCornerNodes();
const int srcInd = f->GetNodeIndex( node );
const SMDS_MeshNode* nPrev = f->GetNode( SMESH_MesherHelper::WrapIndex( srcInd-1, nbNodes ));
const SMDS_MeshNode* nNext = f->GetNode( SMESH_MesherHelper::WrapIndex( srcInd+1, nbNodes ));
const SMDS_MeshNode* nOpp = f->GetNode( SMESH_MesherHelper::WrapIndex( srcInd+2, nbNodes ));
if ( dataToCheckOri && dataToCheckOri->_reversedFaceIds.count( shapeInd ))
std::swap( nPrev, nNext );
simplices.push_back( _Simplex( nPrev, nNext, nOpp ));
}
if ( toSort )
SortSimplices( simplices );
}
//================================================================================
/*!
* \brief Set neighbor simplices side by side
*/
//================================================================================
void _Simplex::SortSimplices(vector<_Simplex>& simplices)
{
vector<_Simplex> sortedSimplices( simplices.size() );
sortedSimplices[0] = simplices[0];
int nbFound = 0;
for ( size_t i = 1; i < simplices.size(); ++i )
{
for ( size_t j = 1; j < simplices.size(); ++j )
if ( sortedSimplices[i-1]._nNext == simplices[j]._nPrev )
{
sortedSimplices[i] = simplices[j];
nbFound++;
break;
}
}
if ( nbFound == simplices.size() - 1 )
simplices.swap( sortedSimplices );
}
//================================================================================
/*!
* \brief DEBUG. Create groups contating temorary data of _LayerEdge's
*/
//================================================================================
void _ViscousBuilder::makeGroupOfLE()
{
#ifdef _DEBUG_
for ( size_t i = 0 ; i < _sdVec.size(); ++i )
{
if ( _sdVec[i]._n2eMap.empty() ) continue;
dumpFunction( SMESH_Comment("make_LayerEdge_") << i );
TNode2Edge::iterator n2e;
for ( n2e = _sdVec[i]._n2eMap.begin(); n2e != _sdVec[i]._n2eMap.end(); ++n2e )
{
_LayerEdge* le = n2e->second;
for ( size_t iN = 1; iN < le->_nodes.size(); ++iN )
dumpCmd(SMESH_Comment("mesh.AddEdge([ ") <<le->_nodes[iN-1]->GetID()
<< ", " << le->_nodes[iN]->GetID() <<"])");
}
dumpFunctionEnd();
dumpFunction( SMESH_Comment("makeNormals") << i );
for ( n2e = _sdVec[i]._n2eMap.begin(); n2e != _sdVec[i]._n2eMap.end(); ++n2e )
{
_LayerEdge* edge = n2e->second;
SMESH_TNodeXYZ nXYZ( edge->_nodes[0] );
nXYZ += edge->_normal * _sdVec[i]._stepSize;
dumpCmd(SMESH_Comment("mesh.AddEdge([ ") << edge->_nodes[0]->GetID()
<< ", mesh.AddNode( " << nXYZ.X()<<","<< nXYZ.Y()<<","<< nXYZ.Z()<<")])");
}
dumpFunctionEnd();
dumpFunction( SMESH_Comment("makeTmpFaces_") << i );
dumpCmd( "faceId1 = mesh.NbElements()" );
TopExp_Explorer fExp( _sdVec[i]._solid, TopAbs_FACE );
for ( ; fExp.More(); fExp.Next() )
{
if (const SMESHDS_SubMesh* sm = _sdVec[i]._proxyMesh->GetProxySubMesh( fExp.Current()))
{
if ( sm->NbElements() == 0 ) continue;
SMDS_ElemIteratorPtr fIt = sm->GetElements();
while ( fIt->more())
{
const SMDS_MeshElement* e = fIt->next();
SMESH_Comment cmd("mesh.AddFace([");
for ( int j=0; j < e->NbCornerNodes(); ++j )
cmd << e->GetNode(j)->GetID() << (j+1<e->NbCornerNodes() ? ",": "])");
dumpCmd( cmd );
}
}
}
dumpCmd( "faceId2 = mesh.NbElements()" );
dumpCmd( SMESH_Comment( "mesh.MakeGroup( 'tmpFaces_" ) << i << "',"
<< "SMESH.FACE, SMESH.FT_RangeOfIds,'=',"
<< "'%s-%s' % (faceId1+1, faceId2))");
dumpFunctionEnd();
}
#endif
}
//================================================================================
/*!
* \brief Find maximal _LayerEdge length (layer thickness) limited by geometry
*/
//================================================================================
void _ViscousBuilder::computeGeomSize( _SolidData& data )
{
data._geomSize = Precision::Infinite();
double intersecDist;
auto_ptr<SMESH_ElementSearcher> searcher
( SMESH_MeshAlgos::GetElementSearcher( *getMeshDS(),
data._proxyMesh->GetFaces( data._solid )) );
for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
{
_EdgesOnShape& eos = data._edgesOnShape[ iS ];
if ( eos._edges.empty() || eos.ShapeType() == TopAbs_EDGE )
continue;
for ( size_t i = 0; i < eos._edges.size(); ++i )
{
eos._edges[i]->FindIntersection( *searcher, intersecDist, data._epsilon, eos );
if ( data._geomSize > intersecDist && intersecDist > 0 )
data._geomSize = intersecDist;
}
}
}
//================================================================================
/*!
* \brief Increase length of _LayerEdge's to reach the required thickness of layers
*/
//================================================================================
bool _ViscousBuilder::inflate(_SolidData& data)
{
SMESH_MesherHelper helper( *_mesh );
// Limit inflation step size by geometry size found by itersecting
// normals of _LayerEdge's with mesh faces
if ( data._stepSize > 0.3 * data._geomSize )
limitStepSize( data, 0.3 * data._geomSize );
const double tgtThick = data._maxThickness;
if ( data._stepSize > data._minThickness )
limitStepSize( data, data._minThickness );
if ( data._stepSize < 1. )
data._epsilon = data._stepSize * 1e-7;
debugMsg( "-- geomSize = " << data._geomSize << ", stepSize = " << data._stepSize );
const double safeFactor = ( 2*data._maxThickness < data._geomSize ) ? 1 : theThickToIntersection;
double avgThick = 0, curThick = 0, distToIntersection = Precision::Infinite();
int nbSteps = 0, nbRepeats = 0;
while ( avgThick < 0.99 )
{
// new target length
curThick += data._stepSize;
if ( curThick > tgtThick )
{
curThick = tgtThick + tgtThick*( 1.-avgThick ) * nbRepeats;
nbRepeats++;
}
// Elongate _LayerEdge's
dumpFunction(SMESH_Comment("inflate")<<data._index<<"_step"<<nbSteps); // debug
for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
{
_EdgesOnShape& eos = data._edgesOnShape[iS];
if ( eos._edges.empty() ) continue;
const double shapeCurThick = Min( curThick, eos._hyp.GetTotalThickness() );
for ( size_t i = 0; i < eos._edges.size(); ++i )
{
eos._edges[i]->SetNewLength( shapeCurThick, eos, helper );
}
}
dumpFunctionEnd();
if ( !updateNormals( data, helper, nbSteps ))
return false;
// Improve and check quality
if ( !smoothAndCheck( data, nbSteps, distToIntersection ))
{
if ( nbSteps > 0 )
{
#ifdef __NOT_INVALIDATE_BAD_SMOOTH
debugMsg("NOT INVALIDATED STEP!");
return error("Smoothing failed", data._index);
#endif
dumpFunction(SMESH_Comment("invalidate")<<data._index<<"_step"<<nbSteps); // debug
for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
{
_EdgesOnShape& eos = data._edgesOnShape[iS];
for ( size_t i = 0; i < eos._edges.size(); ++i )
eos._edges[i]->InvalidateStep( nbSteps+1, eos );
}
dumpFunctionEnd();
}
break; // no more inflating possible
}
nbSteps++;
// Evaluate achieved thickness
avgThick = 0;
for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
{
_EdgesOnShape& eos = data._edgesOnShape[iS];
if ( eos._edges.empty() ) continue;
const double shapeTgtThick = eos._hyp.GetTotalThickness();
for ( size_t i = 0; i < eos._edges.size(); ++i )
{
avgThick += Min( 1., eos._edges[i]->_len / shapeTgtThick );
}
}
avgThick /= data._n2eMap.size();
debugMsg( "-- Thickness " << curThick << " ("<< avgThick*100 << "%) reached" );
if ( distToIntersection < tgtThick * avgThick * safeFactor && avgThick < 0.9 )
{
debugMsg( "-- Stop inflation since "
<< " distToIntersection( "<<distToIntersection<<" ) < avgThick( "
<< tgtThick * avgThick << " ) * " << safeFactor );
break;
}
// new step size
limitStepSize( data, 0.25 * distToIntersection );
if ( data._stepSizeNodes[0] )
data._stepSize = data._stepSizeCoeff *
SMESH_TNodeXYZ(data._stepSizeNodes[0]).Distance(data._stepSizeNodes[1]);
} // while ( avgThick < 0.99 )
if (nbSteps == 0 )
return error("failed at the very first inflation step", data._index);
if ( avgThick < 0.99 )
{
if ( !data._proxyMesh->_warning || data._proxyMesh->_warning->IsOK() )
{
data._proxyMesh->_warning.reset
( new SMESH_ComputeError (COMPERR_WARNING,
SMESH_Comment("Thickness ") << tgtThick <<
" of viscous layers not reached,"
" average reached thickness is " << avgThick*tgtThick));
}
}
// Restore position of src nodes moved by infaltion on _noShrinkShapes
dumpFunction(SMESH_Comment("restoNoShrink_So")<<data._index); // debug
for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
{
_EdgesOnShape& eos = data._edgesOnShape[iS];
if ( !eos._edges.empty() && eos._edges[0]->_nodes.size() == 1 )
for ( size_t i = 0; i < eos._edges.size(); ++i )
{
restoreNoShrink( *eos._edges[ i ] );
}
}
dumpFunctionEnd();
return true;
}
//================================================================================
/*!
* \brief Improve quality of layer inner surface and check intersection
*/
//================================================================================
bool _ViscousBuilder::smoothAndCheck(_SolidData& data,
const int nbSteps,
double & distToIntersection)
{
if ( data._nbShapesToSmooth == 0 )
return true; // no shapes needing smoothing
bool moved, improved;
vector< _LayerEdge* > badSmooEdges;
SMESH_MesherHelper helper(*_mesh);
Handle(Geom_Surface) surface;
TopoDS_Face F;
for ( int isFace = 0; isFace < 2; ++isFace ) // smooth on [ EDGEs, FACEs ]
{
const TopAbs_ShapeEnum shapeType = isFace ? TopAbs_FACE : TopAbs_EDGE;
for ( int iS = 0; iS < data._edgesOnShape.size(); ++iS )
{
_EdgesOnShape& eos = data._edgesOnShape[ iS ];
if ( !eos._toSmooth || eos.ShapeType() != shapeType )
continue;
// already smoothed?
bool toSmooth = ( eos._edges[ 0 ]->NbSteps() >= nbSteps+1 );
if ( !toSmooth ) continue;
if ( !eos._hyp.ToSmooth() )
{
// smooth disabled by the user; check validy only
if ( !isFace ) continue;
double vol;
for ( size_t i = 0; i < eos._edges.size(); ++i )
{
_LayerEdge* edge = eos._edges[i];
const gp_XYZ& curPos ( );
for ( size_t iF = 0; iF < edge->_simplices.size(); ++iF )
if ( !edge->_simplices[iF].IsForward( edge->_nodes[0],
&edge->_pos.back(), vol ))
return false;
}
continue; // goto to the next EDGE or FACE
}
// prepare data
if ( eos.SWOLType() == TopAbs_FACE )
{
if ( !F.IsSame( eos._sWOL )) {
F = TopoDS::Face( eos._sWOL );
helper.SetSubShape( F );
surface = BRep_Tool::Surface( F );
}
}
else
{
F.Nullify(); surface.Nullify();
}
const TGeomID sInd = eos._shapeID;
// perform smoothing
if ( eos.ShapeType() == TopAbs_EDGE )
{
dumpFunction(SMESH_Comment("smooth")<<data._index << "_Ed"<<sInd <<"_InfStep"<<nbSteps);
// try a simple solution on an analytic EDGE
if ( !smoothAnalyticEdge( data, eos, surface, F, helper ))
{
// smooth on EDGE's
int step = 0;
do {
moved = false;
for ( size_t i = 0; i < eos._edges.size(); ++i )
{
moved |= eos._edges[i]->SmoothOnEdge( surface, F, helper );
}
dumpCmd( SMESH_Comment("# end step ")<<step);
}
while ( moved && step++ < 5 );
}
dumpFunctionEnd();
}
else
{
// smooth on FACE's
const bool isConcaveFace = data._concaveFaces.count( sInd );
int step = 0, stepLimit = 5, badNb = 0;
while (( ++step <= stepLimit ) || improved )
{
dumpFunction(SMESH_Comment("smooth")<<data._index<<"_Fa"<<sInd
<<"_InfStep"<<nbSteps<<"_"<<step); // debug
int oldBadNb = badNb;
badSmooEdges.clear();
if ( step % 2 ) {
for ( size_t i = 0; i < eos._edges.size(); ++i ) // iterate forward
if ( eos._edges[i]->Smooth( step, isConcaveFace, false ))
badSmooEdges.push_back( eos._edges[i] );
}
else {
for ( int i = eos._edges.size()-1; i >= 0; --i ) // iterate backward
if ( eos._edges[i]->Smooth( step, isConcaveFace, false ))
badSmooEdges.push_back( eos._edges[i] );
}
badNb = badSmooEdges.size();
improved = ( badNb < oldBadNb );
if ( !badSmooEdges.empty() && step >= stepLimit / 2 )
{
// look for the best smooth of _LayerEdge's neighboring badSmooEdges
vector<_Simplex> simplices;
for ( size_t i = 0; i < badSmooEdges.size(); ++i )
{
_LayerEdge* ledge = badSmooEdges[i];
_Simplex::GetSimplices( ledge->_nodes[0], simplices, data._ignoreFaceIds );
for ( size_t iS = 0; iS < simplices.size(); ++iS )
{
TNode2Edge::iterator n2e = data._n2eMap.find( simplices[iS]._nNext );
if ( n2e != data._n2eMap.end()) {
_LayerEdge* ledge2 = n2e->second;
if ( ledge2->_nodes[0]->getshapeId() == sInd )
ledge2->Smooth( step, isConcaveFace, /*findBest=*/true );
}
}
}
}
// issue 22576 -- no bad faces but still there are intersections to fix
// if ( improved && badNb == 0 )
// stepLimit = step + 3;
dumpFunctionEnd();
}
if ( badNb > 0 )
{
#ifdef __myDEBUG
double vol = 0;
for ( int i = 0; i < eos._edges.size(); ++i )
{
_LayerEdge* edge = eos._edges[i];
SMESH_TNodeXYZ tgtXYZ( edge->_nodes.back() );
for ( size_t j = 0; j < edge->_simplices.size(); ++j )
if ( !edge->_simplices[j].IsForward( edge->_nodes[0], &tgtXYZ, vol ))
{
cout << "Bad simplex ( " << edge->_nodes[0]->GetID()<< " "<< tgtXYZ._node->GetID()
<< " "<< edge->_simplices[j]._nPrev->GetID()
<< " "<< edge->_simplices[j]._nNext->GetID() << " )" << endl;
return false;
}
}
#endif
return false;
}
} // // smooth on FACE's
} // loop on shapes
} // smooth on [ EDGEs, FACEs ]
// Check orientation of simplices of _ConvexFace::_simplexTestEdges
map< TGeomID, _ConvexFace >::iterator id2face = data._convexFaces.begin();
for ( ; id2face != data._convexFaces.end(); ++id2face )
{
_ConvexFace & convFace = (*id2face).second;
if ( !convFace._simplexTestEdges.empty() &&
convFace._simplexTestEdges[0]->_nodes[0]->GetPosition()->GetDim() == 2 )
continue; // _simplexTestEdges are based on FACE -- already checked while smoothing
if ( !convFace.CheckPrisms() )
return false;
}
// Check if the last segments of _LayerEdge intersects 2D elements;
// checked elements are either temporary faces or faces on surfaces w/o the layers
auto_ptr<SMESH_ElementSearcher> searcher
( SMESH_MeshAlgos::GetElementSearcher( *getMeshDS(),
data._proxyMesh->GetFaces( data._solid )) );
distToIntersection = Precision::Infinite();
double dist;
const SMDS_MeshElement* intFace = 0;
const SMDS_MeshElement* closestFace = 0;
_LayerEdge* le = 0;
for ( int iS = 0; iS < data._edgesOnShape.size(); ++iS )
{
_EdgesOnShape& eos = data._edgesOnShape[ iS ];
if ( eos._edges.empty() || !eos._sWOL.IsNull() )
continue;
for ( size_t i = 0; i < eos._edges.size(); ++i )
{
if ( eos._edges[i]->FindIntersection( *searcher, dist, data._epsilon, eos, &intFace ))
return false;
if ( distToIntersection > dist )
{
// ignore intersection of a _LayerEdge based on a _ConvexFace with a face
// lying on this _ConvexFace
if ( _ConvexFace* convFace = data.GetConvexFace( intFace->getshapeId() ))
if ( convFace->_subIdToEOS.count ( eos._shapeID ))
continue;
// ignore intersection of a _LayerEdge based on a FACE with an element on this FACE
// ( avoid limiting the thickness on the case of issue 22576)
if ( intFace->getshapeId() == eos._shapeID )
continue;
distToIntersection = dist;
le = eos._edges[i];
closestFace = intFace;
}
}
}
#ifdef __myDEBUG
if ( closestFace )
{
SMDS_MeshElement::iterator nIt = closestFace->begin_nodes();
cout << "Shortest distance: _LayerEdge nodes: tgt " << le->_nodes.back()->GetID()
<< " src " << le->_nodes[0]->GetID()<< ", intersection with face ("
<< (*nIt++)->GetID()<<" "<< (*nIt++)->GetID()<<" "<< (*nIt++)->GetID()
<< ") distance = " << distToIntersection<< endl;
}
#endif
return true;
}
//================================================================================
/*!
* \brief Return a curve of the EDGE to be used for smoothing and arrange
* _LayerEdge's to be in a consequent order
*/
//================================================================================
Handle(Geom_Curve) _SolidData::CurveForSmooth( const TopoDS_Edge& E,
_EdgesOnShape& eos,
SMESH_MesherHelper& helper)
{
const TGeomID eIndex = eos._shapeID;
map< TGeomID, Handle(Geom_Curve)>::iterator i2curve = _edge2curve.find( eIndex );
if ( i2curve == _edge2curve.end() )
{
// sort _LayerEdge's by position on the EDGE
SortOnEdge( E, eos._edges, helper );
SMESHDS_SubMesh* smDS = eos._subMesh->GetSubMeshDS();
TopLoc_Location loc; double f,l;
Handle(Geom_Line) line;
Handle(Geom_Circle) circle;
bool isLine, isCirc;
if ( eos._sWOL.IsNull() ) /////////////////////////////////////////// 3D case
{
// check if the EDGE is a line
Handle(Geom_Curve) curve = BRep_Tool::Curve( E, loc, f, l);
if ( curve->IsKind( STANDARD_TYPE( Geom_TrimmedCurve )))
curve = Handle(Geom_TrimmedCurve)::DownCast( curve )->BasisCurve();
line = Handle(Geom_Line)::DownCast( curve );
circle = Handle(Geom_Circle)::DownCast( curve );
isLine = (!line.IsNull());
isCirc = (!circle.IsNull());
if ( !isLine && !isCirc ) // Check if the EDGE is close to a line
{
// Bnd_B3d bndBox;
// SMDS_NodeIteratorPtr nIt = smDS->GetNodes();
// while ( nIt->more() )
// bndBox.Add( SMESH_TNodeXYZ( nIt->next() ));
// gp_XYZ size = bndBox.CornerMax() - bndBox.CornerMin();
// gp_Pnt p0, p1;
// if ( eos._edges.size() > 1 ) {
// p0 = SMESH_TNodeXYZ( eos._edges[0]->_nodes[0] );
// p1 = SMESH_TNodeXYZ( eos._edges[1]->_nodes[0] );
// }
// else {
// p0 = curve->Value( f );
// p1 = curve->Value( l );
// }
// const double lineTol = 1e-2 * p0.Distance( p1 );
// for ( int i = 0; i < 3 && !isLine; ++i )
// isLine = ( size.Coord( i+1 ) <= lineTol ); ////////// <--- WRONG
isLine = SMESH_Algo::IsStraight( E );
if ( isLine )
line = new Geom_Line( gp::OX() ); // only type does matter
}
if ( !isLine && !isCirc && eos._edges.size() > 2) // Check if the EDGE is close to a circle
{
// TODO
}
}
else //////////////////////////////////////////////////////////////////////// 2D case
{
const TopoDS_Face& F = TopoDS::Face( eos._sWOL );
// check if the EDGE is a line
Handle(Geom2d_Curve) curve = BRep_Tool::CurveOnSurface( E, F, f, l);
if ( curve->IsKind( STANDARD_TYPE( Geom2d_TrimmedCurve )))
curve = Handle(Geom2d_TrimmedCurve)::DownCast( curve )->BasisCurve();
Handle(Geom2d_Line) line2d = Handle(Geom2d_Line)::DownCast( curve );
Handle(Geom2d_Circle) circle2d = Handle(Geom2d_Circle)::DownCast( curve );
isLine = (!line2d.IsNull());
isCirc = (!circle2d.IsNull());
if ( !isLine && !isCirc) // Check if the EDGE is close to a line
{
Bnd_B2d bndBox;
SMDS_NodeIteratorPtr nIt = smDS->GetNodes();
while ( nIt->more() )
bndBox.Add( helper.GetNodeUV( F, nIt->next() ));
gp_XY size = bndBox.CornerMax() - bndBox.CornerMin();
const double lineTol = 1e-2 * sqrt( bndBox.SquareExtent() );
for ( int i = 0; i < 2 && !isLine; ++i )
isLine = ( size.Coord( i+1 ) <= lineTol );
}
if ( !isLine && !isCirc && eos._edges.size() > 2) // Check if the EDGE is close to a circle
{
// TODO
}
if ( isLine )
{
line = new Geom_Line( gp::OX() ); // only type does matter
}
else if ( isCirc )
{
gp_Pnt2d p = circle2d->Location();
gp_Ax2 ax( gp_Pnt( p.X(), p.Y(), 0), gp::DX());
circle = new Geom_Circle( ax, 1.); // only center position does matter
}
}
Handle(Geom_Curve)& res = _edge2curve[ eIndex ];
if ( isLine )
res = line;
else if ( isCirc )
res = circle;
return res;
}
return i2curve->second;
}
//================================================================================
/*!
* \brief Sort _LayerEdge's by a parameter on a given EDGE
*/
//================================================================================
void _SolidData::SortOnEdge( const TopoDS_Edge& E,
vector< _LayerEdge* >& edges,
SMESH_MesherHelper& helper)
{
map< double, _LayerEdge* > u2edge;
for ( size_t i = 0; i < edges.size(); ++i )
u2edge.insert( make_pair( helper.GetNodeU( E, edges[i]->_nodes[0] ), edges[i] ));
ASSERT( u2edge.size() == edges.size() );
map< double, _LayerEdge* >::iterator u2e = u2edge.begin();
for ( int i = 0; i < edges.size(); ++i, ++u2e )
edges[i] = u2e->second;
Sort2NeiborsOnEdge( edges );
}
//================================================================================
/*!
* \brief Set _2neibors according to the order of _LayerEdge on EDGE
*/
//================================================================================
void _SolidData::Sort2NeiborsOnEdge( vector< _LayerEdge* >& edges )
{
for ( size_t i = 0; i < edges.size()-1; ++i )
if ( edges[i]->_2neibors->tgtNode(1) != edges[i+1]->_nodes.back() )
edges[i]->_2neibors->reverse();
const size_t iLast = edges.size() - 1;
if ( edges.size() > 1 &&
edges[iLast]->_2neibors->tgtNode(0) != edges[iLast-1]->_nodes.back() )
edges[iLast]->_2neibors->reverse();
}
//================================================================================
/*!
* \brief Return _EdgesOnShape* corresponding to the shape
*/
//================================================================================
_EdgesOnShape* _SolidData::GetShapeEdges(const TGeomID shapeID )
{
if ( shapeID < _edgesOnShape.size() &&
_edgesOnShape[ shapeID ]._shapeID == shapeID )
return & _edgesOnShape[ shapeID ];
for ( size_t i = 0; i < _edgesOnShape.size(); ++i )
if ( _edgesOnShape[i]._shapeID == shapeID )
return & _edgesOnShape[i];
return 0;
}
//================================================================================
/*!
* \brief Return _EdgesOnShape* corresponding to the shape
*/
//================================================================================
_EdgesOnShape* _SolidData::GetShapeEdges(const TopoDS_Shape& shape )
{
SMESHDS_Mesh* meshDS = _proxyMesh->GetMesh()->GetMeshDS();
return GetShapeEdges( meshDS->ShapeToIndex( shape ));
}
//================================================================================
/*!
* \brief Prepare data of the _LayerEdge for smoothing on FACE
*/
//================================================================================
void _SolidData::PrepareEdgesToSmoothOnFace( _EdgesOnShape* eof, bool substituteSrcNodes )
{
set< TGeomID > vertices;
SMESH_MesherHelper helper( *_proxyMesh->GetMesh() );
if ( isConcave( TopoDS::Face( eof->_shape ), helper, &vertices ))
_concaveFaces.insert( eof->_shapeID );
for ( size_t i = 0; i < eof->_edges.size(); ++i )
eof->_edges[i]->_smooFunction = 0;
for ( size_t i = 0; i < eof->_edges.size(); ++i )
{
_LayerEdge* edge = eof->_edges[i];
_Simplex::GetSimplices
( edge->_nodes[0], edge->_simplices, _ignoreFaceIds, this, /*sort=*/true );
edge->ChooseSmooFunction( vertices, _n2eMap );
double avgNormProj = 0, avgLen = 0;
for ( size_t i = 0; i < edge->_simplices.size(); ++i )
{
_Simplex& s = edge->_simplices[i];
gp_XYZ vec = edge->_pos.back() - SMESH_TNodeXYZ( s._nPrev );
avgNormProj += edge->_normal * vec;
avgLen += vec.Modulus();
if ( substituteSrcNodes )
{
s._nNext = _n2eMap[ s._nNext ]->_nodes.back();
s._nPrev = _n2eMap[ s._nPrev ]->_nodes.back();
}
}
avgNormProj /= edge->_simplices.size();
avgLen /= edge->_simplices.size();
edge->_curvature = _Curvature::New( avgNormProj, avgLen );
}
}
//================================================================================
/*!
* \brief Add faces for smoothing
*/
//================================================================================
void _SolidData::AddShapesToSmooth( const set< _EdgesOnShape* >& eosSet )
{
set< _EdgesOnShape * >::const_iterator eos = eosSet.begin();
for ( ; eos != eosSet.end(); ++eos )
{
if ( !*eos || (*eos)->_toSmooth ) continue;
(*eos)->_toSmooth = true;
if ( (*eos)->ShapeType() == TopAbs_FACE )
{
PrepareEdgesToSmoothOnFace( *eos, /*substituteSrcNodes=*/true );
}
}
}
//================================================================================
/*!
* \brief smooth _LayerEdge's on a staight EDGE or circular EDGE
*/
//================================================================================
bool _ViscousBuilder::smoothAnalyticEdge( _SolidData& data,
_EdgesOnShape& eos,
Handle(Geom_Surface)& surface,
const TopoDS_Face& F,
SMESH_MesherHelper& helper)
{
const TopoDS_Edge& E = TopoDS::Edge( eos._shape );
Handle(Geom_Curve) curve = data.CurveForSmooth( E, eos, helper );
if ( curve.IsNull() ) return false;
const size_t iFrom = 0, iTo = eos._edges.size();
// compute a relative length of segments
vector< double > len( iTo-iFrom+1 );
{
double curLen, prevLen = len[0] = 1.0;
for ( int i = iFrom; i < iTo; ++i )
{
curLen = prevLen * eos._edges[i]->_2neibors->_wgt[0] / eos._edges[i]->_2neibors->_wgt[1];
len[i-iFrom+1] = len[i-iFrom] + curLen;
prevLen = curLen;
}
}
if ( curve->IsKind( STANDARD_TYPE( Geom_Line )))
{
if ( F.IsNull() ) // 3D
{
SMESH_TNodeXYZ p0( eos._edges[iFrom]->_2neibors->tgtNode(0));
SMESH_TNodeXYZ p1( eos._edges[iTo-1]->_2neibors->tgtNode(1));
for ( int i = iFrom; i < iTo; ++i )
{
double r = len[i-iFrom] / len.back();
gp_XYZ newPos = p0 * ( 1. - r ) + p1 * r;
eos._edges[i]->_pos.back() = newPos;
SMDS_MeshNode* tgtNode = const_cast<SMDS_MeshNode*>( eos._edges[i]->_nodes.back() );
tgtNode->setXYZ( newPos.X(), newPos.Y(), newPos.Z() );
dumpMove( tgtNode );
}
}
else
{
// gp_XY uv0 = helper.GetNodeUV( F, eos._edges[iFrom]->_2neibors->tgtNode(0));
// gp_XY uv1 = helper.GetNodeUV( F, eos._edges[iTo-1]->_2neibors->tgtNode(1));
_LayerEdge* e0 = eos._edges[iFrom]->_2neibors->_edges[0];
_LayerEdge* e1 = eos._edges[iTo-1]->_2neibors->_edges[1];
gp_XY uv0 = e0->LastUV( F, *data.GetShapeEdges( e0 ));
gp_XY uv1 = e1->LastUV( F, *data.GetShapeEdges( e1 ));
if ( eos._edges[iFrom]->_2neibors->tgtNode(0) ==
eos._edges[iTo-1]->_2neibors->tgtNode(1) ) // closed edge
{
int iPeriodic = helper.GetPeriodicIndex();
if ( iPeriodic == 1 || iPeriodic == 2 )
{
uv1.SetCoord( iPeriodic, helper.GetOtherParam( uv1.Coord( iPeriodic )));
if ( uv0.Coord( iPeriodic ) > uv1.Coord( iPeriodic ))
std::swap( uv0, uv1 );
}
}
const gp_XY rangeUV = uv1 - uv0;
for ( int i = iFrom; i < iTo; ++i )
{
double r = len[i-iFrom] / len.back();
gp_XY newUV = uv0 + r * rangeUV;
eos._edges[i]->_pos.back().SetCoord( newUV.X(), newUV.Y(), 0 );
gp_Pnt newPos = surface->Value( newUV.X(), newUV.Y() );
SMDS_MeshNode* tgtNode = const_cast<SMDS_MeshNode*>( eos._edges[i]->_nodes.back() );
tgtNode->setXYZ( newPos.X(), newPos.Y(), newPos.Z() );
dumpMove( tgtNode );
SMDS_FacePosition* pos = static_cast<SMDS_FacePosition*>( tgtNode->GetPosition() );
pos->SetUParameter( newUV.X() );
pos->SetVParameter( newUV.Y() );
}
}
return true;
}
if ( curve->IsKind( STANDARD_TYPE( Geom_Circle )))
{
Handle(Geom_Circle) circle = Handle(Geom_Circle)::DownCast( curve );
gp_Pnt center3D = circle->Location();
if ( F.IsNull() ) // 3D
{
if ( eos._edges[iFrom]->_2neibors->tgtNode(0) ==
eos._edges[iTo-1]->_2neibors->tgtNode(1) )
return true; // closed EDGE - nothing to do
return false; // TODO ???
}
else // 2D
{
const gp_XY center( center3D.X(), center3D.Y() );
_LayerEdge* e0 = eos._edges[iFrom]->_2neibors->_edges[0];
_LayerEdge* eM = eos._edges[iFrom];
_LayerEdge* e1 = eos._edges[iTo-1]->_2neibors->_edges[1];
gp_XY uv0 = e0->LastUV( F, *data.GetShapeEdges( e0 ) );
gp_XY uvM = eM->LastUV( F, *data.GetShapeEdges( eM ) );
gp_XY uv1 = e1->LastUV( F, *data.GetShapeEdges( e1 ) );
gp_Vec2d vec0( center, uv0 );
gp_Vec2d vecM( center, uvM );
gp_Vec2d vec1( center, uv1 );
double uLast = vec0.Angle( vec1 ); // -PI - +PI
double uMidl = vec0.Angle( vecM );
if ( uLast * uMidl <= 0. )
uLast += ( uMidl > 0 ? +2. : -2. ) * M_PI;
const double radius = 0.5 * ( vec0.Magnitude() + vec1.Magnitude() );
gp_Ax2d axis( center, vec0 );
gp_Circ2d circ( axis, radius );
for ( int i = iFrom; i < iTo; ++i )
{
double newU = uLast * len[i-iFrom] / len.back();
gp_Pnt2d newUV = ElCLib::Value( newU, circ );
eos._edges[i]->_pos.back().SetCoord( newUV.X(), newUV.Y(), 0 );
gp_Pnt newPos = surface->Value( newUV.X(), newUV.Y() );
SMDS_MeshNode* tgtNode = const_cast<SMDS_MeshNode*>( eos._edges[i]->_nodes.back() );
tgtNode->setXYZ( newPos.X(), newPos.Y(), newPos.Z() );
dumpMove( tgtNode );
SMDS_FacePosition* pos = static_cast<SMDS_FacePosition*>( tgtNode->GetPosition() );
pos->SetUParameter( newUV.X() );
pos->SetVParameter( newUV.Y() );
}
}
return true;
}
return false;
}
//================================================================================
/*!
* \brief Modify normals of _LayerEdge's on EDGE's to avoid intersection with
* _LayerEdge's on neighbor EDGE's
*/
//================================================================================
bool _ViscousBuilder::updateNormals( _SolidData& data,
SMESH_MesherHelper& helper,
int stepNb )
{
if ( stepNb > 0 )
return updateNormalsOfConvexFaces( data, helper, stepNb );
// make temporary quadrangles got by extrusion of
// mesh edges along _LayerEdge._normal's
vector< const SMDS_MeshElement* > tmpFaces;
{
set< SMESH_TLink > extrudedLinks; // contains target nodes
vector< const SMDS_MeshNode*> nodes(4); // of a tmp mesh face
dumpFunction(SMESH_Comment("makeTmpFacesOnEdges")<<data._index);
for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
{
_EdgesOnShape& eos = data._edgesOnShape[ iS ];
if ( eos.ShapeType() != TopAbs_EDGE || !eos._sWOL.IsNull() )
continue;
for ( size_t i = 0; i < eos._edges.size(); ++i )
{
_LayerEdge* edge = eos._edges[i];
const SMDS_MeshNode* tgt1 = edge->_nodes.back();
for ( int j = 0; j < 2; ++j ) // loop on _2NearEdges
{
const SMDS_MeshNode* tgt2 = edge->_2neibors->tgtNode(j);
pair< set< SMESH_TLink >::iterator, bool > link_isnew =
extrudedLinks.insert( SMESH_TLink( tgt1, tgt2 ));
if ( !link_isnew.second )
{
extrudedLinks.erase( link_isnew.first );
continue; // already extruded and will no more encounter
}
// a _LayerEdge containg tgt2
_LayerEdge* neiborEdge = edge->_2neibors->_edges[j];
_TmpMeshFaceOnEdge* f = new _TmpMeshFaceOnEdge( edge, neiborEdge, --_tmpFaceID );
tmpFaces.push_back( f );
dumpCmd(SMESH_Comment("mesh.AddFace([ ")
<<f->_nn[0]->GetID()<<", "<<f->_nn[1]->GetID()<<", "
<<f->_nn[2]->GetID()<<", "<<f->_nn[3]->GetID()<<" ])");
}
}
}
dumpFunctionEnd();
}
// Check if _LayerEdge's based on EDGE's intersects tmpFaces.
// Perform two loops on _LayerEdge on EDGE's:
// 1) to find and fix intersection
// 2) to check that no new intersection appears as result of 1)
SMDS_ElemIteratorPtr fIt( new SMDS_ElementVectorIterator( tmpFaces.begin(),
tmpFaces.end()));
auto_ptr<SMESH_ElementSearcher> searcher
( SMESH_MeshAlgos::GetElementSearcher( *getMeshDS(), fIt ));
// 1) Find intersections
double dist;
const SMDS_MeshElement* face;
typedef map< _LayerEdge*, set< _LayerEdge*, _LayerEdgeCmp >, _LayerEdgeCmp > TLEdge2LEdgeSet;
TLEdge2LEdgeSet edge2CloseEdge;
const double eps = data._epsilon * data._epsilon;
for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
{
_EdgesOnShape& eos = data._edgesOnShape[ iS ];
if (( eos.ShapeType() != TopAbs_EDGE ) &&
( eos._sWOL.IsNull() || eos.SWOLType() != TopAbs_FACE ))
continue;
for ( size_t i = 0; i < eos._edges.size(); ++i )
{
_LayerEdge* edge = eos._edges[i];
if ( edge->FindIntersection( *searcher, dist, eps, eos, &face ))
{
const _TmpMeshFaceOnEdge* f = (const _TmpMeshFaceOnEdge*) face;
set< _LayerEdge*, _LayerEdgeCmp > & ee = edge2CloseEdge[ edge ];
ee.insert( f->_le1 );
ee.insert( f->_le2 );
if ( f->_le1->IsOnEdge() && data.GetShapeEdges( f->_le1 )->_sWOL.IsNull() )
edge2CloseEdge[ f->_le1 ].insert( edge );
if ( f->_le2->IsOnEdge() && data.GetShapeEdges( f->_le2 )->_sWOL.IsNull() )
edge2CloseEdge[ f->_le2 ].insert( edge );
}
}
}
// Set _LayerEdge._normal
if ( !edge2CloseEdge.empty() )
{
dumpFunction(SMESH_Comment("updateNormals")<<data._index);
set< _EdgesOnShape* > shapesToSmooth;
// vector to store new _normal and _cosin for each edge in edge2CloseEdge
vector< pair< _LayerEdge*, _LayerEdge > > edge2newEdge( edge2CloseEdge.size() );
TLEdge2LEdgeSet::iterator e2ee = edge2CloseEdge.begin();
for ( size_t iE = 0; e2ee != edge2CloseEdge.end(); ++e2ee, ++iE )
{
_LayerEdge* edge1 = e2ee->first;
_LayerEdge* edge2 = 0;
set< _LayerEdge*, _LayerEdgeCmp >& ee = e2ee->second;
edge2newEdge[ iE ].first = NULL;
_EdgesOnShape* eos1 = data.GetShapeEdges( edge1 );
if ( !eos1 ) continue;
// find EDGEs the edges reside
// TopoDS_Edge E1, E2;
// TopoDS_Shape S = helper.GetSubShapeByNode( edge1->_nodes[0], getMeshDS() );
// if ( S.ShapeType() != TopAbs_EDGE )
// continue; // TODO: find EDGE by VERTEX
// E1 = TopoDS::Edge( S );
set< _LayerEdge*, _LayerEdgeCmp >::iterator eIt = ee.begin();
for ( ; !edge2 && eIt != ee.end(); ++eIt )
{
if ( eos1->_sWOL == data.GetShapeEdges( *eIt )->_sWOL )
edge2 = *eIt;
}
if ( !edge2 ) continue;
edge2newEdge[ iE ].first = edge1;
_LayerEdge& newEdge = edge2newEdge[ iE ].second;
// while ( E2.IsNull() && eIt != ee.end())
// {
// _LayerEdge* e2 = *eIt++;
// TopoDS_Shape S = helper.GetSubShapeByNode( e2->_nodes[0], getMeshDS() );
// if ( S.ShapeType() == TopAbs_EDGE )
// E2 = TopoDS::Edge( S ), edge2 = e2;
// }
// if ( E2.IsNull() ) continue; // TODO: find EDGE by VERTEX
// find 3 FACEs sharing 2 EDGEs
// TopoDS_Face FF1[2], FF2[2];
// PShapeIteratorPtr fIt = helper.GetAncestors(E1, *_mesh, TopAbs_FACE);
// while ( fIt->more() && FF1[1].IsNull() )
// {
// const TopoDS_Face *F = (const TopoDS_Face*) fIt->next();
// if ( helper.IsSubShape( *F, data._solid))
// FF1[ FF1[0].IsNull() ? 0 : 1 ] = *F;
// }
// fIt = helper.GetAncestors(E2, *_mesh, TopAbs_FACE);
// while ( fIt->more() && FF2[1].IsNull())
// {
// const TopoDS_Face *F = (const TopoDS_Face*) fIt->next();
// if ( helper.IsSubShape( *F, data._solid))
// FF2[ FF2[0].IsNull() ? 0 : 1 ] = *F;
// }
// // exclude a FACE common to E1 and E2 (put it to FFn[1] )
// if ( FF1[0].IsSame( FF2[0]) || FF1[0].IsSame( FF2[1]))
// std::swap( FF1[0], FF1[1] );
// if ( FF2[0].IsSame( FF1[0]) )
// std::swap( FF2[0], FF2[1] );
// if ( FF1[0].IsNull() || FF2[0].IsNull() )
// continue;
// get a new normal for edge1
//bool ok;
gp_Vec dir1 = edge1->_normal, dir2 = edge2->_normal;
// if ( edge1->_cosin < 0 )
// dir1 = getFaceDir( FF1[0], E1, edge1->_nodes[0], helper, ok ).Normalized();
// if ( edge2->_cosin < 0 )
// dir2 = getFaceDir( FF2[0], E2, edge2->_nodes[0], helper, ok ).Normalized();
double cos1 = Abs( edge1->_cosin ), cos2 = Abs( edge2->_cosin );
double wgt1 = ( cos1 + 0.001 ) / ( cos1 + cos2 + 0.002 );
double wgt2 = ( cos2 + 0.001 ) / ( cos1 + cos2 + 0.002 );
newEdge._normal = ( wgt1 * dir1 + wgt2 * dir2 ).XYZ();
newEdge._normal.Normalize();
// cout << edge1->_nodes[0]->GetID() << " "
// << edge2->_nodes[0]->GetID() << " NORM: "
// << newEdge._normal.X() << ", " << newEdge._normal.Y() << ", " << newEdge._normal.Z() << endl;
// get new cosin
if ( cos1 < theMinSmoothCosin )
{
newEdge._cosin = edge2->_cosin;
}
else if ( cos2 > theMinSmoothCosin ) // both cos1 and cos2 > theMinSmoothCosin
{
// gp_Vec dirInFace;
// if ( edge1->_cosin < 0 )
// dirInFace = dir1;
// else
// dirInFace = getFaceDir( FF1[0], E1, edge1->_nodes[0], helper, ok );
// double angle = dirInFace.Angle( edge1->_normal ); // [0,PI]
// edge1->SetCosin( Cos( angle ));
//newEdge._cosin = 0; // ???????????
newEdge._cosin = ( wgt1 * cos1 + wgt2 * cos2 ) * edge1->_cosin / cos1;
}
else
{
newEdge._cosin = edge1->_cosin;
}
// find shapes that need smoothing due to change of _normal
if ( edge1->_cosin < theMinSmoothCosin &&
newEdge._cosin > theMinSmoothCosin )
{
if ( eos1->_sWOL.IsNull() )
{
SMDS_ElemIteratorPtr fIt = edge1->_nodes[0]->GetInverseElementIterator(SMDSAbs_Face);
while ( fIt->more() )
shapesToSmooth.insert( data.GetShapeEdges( fIt->next()->getshapeId() ));
//limitStepSize( data, fIt->next(), edge1->_cosin ); // too late
}
else // edge1 inflates along a FACE
{
TopoDS_Shape V = helper.GetSubShapeByNode( edge1->_nodes[0], getMeshDS() );
PShapeIteratorPtr eIt = helper.GetAncestors( V, *_mesh, TopAbs_EDGE );
while ( const TopoDS_Shape* E = eIt->next() )
{
if ( !helper.IsSubShape( *E, /*FACE=*/eos1->_sWOL ))
continue;
gp_Vec edgeDir = getEdgeDir( TopoDS::Edge( *E ), TopoDS::Vertex( V ));
double angle = edgeDir.Angle( newEdge._normal ); // [0,PI]
if ( angle < M_PI / 2 )
shapesToSmooth.insert( data.GetShapeEdges( *E ));
}
}
}
}
data.AddShapesToSmooth( shapesToSmooth );
// Update data of edges depending on a new _normal
for ( size_t iE = 0; iE < edge2newEdge.size(); ++iE )
{
_LayerEdge* edge1 = edge2newEdge[ iE ].first;
_LayerEdge& newEdge = edge2newEdge[ iE ].second;
if ( !edge1 ) continue;
_EdgesOnShape* eos1 = data.GetShapeEdges( edge1 );
if ( !eos1 ) continue;
edge1->_normal = newEdge._normal;
edge1->SetCosin( newEdge._cosin );
edge1->InvalidateStep( 1, *eos1 );
edge1->_len = 0;
edge1->SetNewLength( data._stepSize, *eos1, helper );
if ( edge1->IsOnEdge() )
{
const SMDS_MeshNode * n1 = edge1->_2neibors->srcNode(0);
const SMDS_MeshNode * n2 = edge1->_2neibors->srcNode(1);
edge1->SetDataByNeighbors( n1, n2, *eos1, helper );
}
// Update normals and other dependent data of not intersecting _LayerEdge's
// neighboring the intersecting ones
if ( !edge1->_2neibors )
continue;
for ( int j = 0; j < 2; ++j ) // loop on 2 neighbors
{
_LayerEdge* neighbor = edge1->_2neibors->_edges[j];
if ( edge2CloseEdge.count ( neighbor ))
continue; // j-th neighbor is also intersected
_EdgesOnShape* eos = data.GetShapeEdges( neighbor );
if ( !eos ) continue;
_LayerEdge* prevEdge = edge1;
const int nbSteps = 10;
for ( int step = nbSteps; step; --step ) // step from edge1 in j-th direction
{
if ( !neighbor->_2neibors )
break; // neighbor is on VERTEX
int iNext = 0;
_LayerEdge* nextEdge = neighbor->_2neibors->_edges[iNext];
if ( nextEdge == prevEdge )
nextEdge = neighbor->_2neibors->_edges[ ++iNext ];
double r = double(step-1)/nbSteps;
if ( !nextEdge->_2neibors )
r = 0.5;
gp_XYZ newNorm = prevEdge->_normal * r + nextEdge->_normal * (1-r);
newNorm.Normalize();
neighbor->_normal = newNorm;
neighbor->SetCosin( prevEdge->_cosin * r + nextEdge->_cosin * (1-r) );
neighbor->SetDataByNeighbors( prevEdge->_nodes[0], nextEdge->_nodes[0], *eos, helper );
neighbor->InvalidateStep( 1, *eos );
neighbor->_len = 0;
neighbor->SetNewLength( data._stepSize, *eos, helper );
// goto the next neighbor
prevEdge = neighbor;
neighbor = nextEdge;
}
}
}
dumpFunctionEnd();
}
// 2) Check absence of intersections
// TODO?
for ( size_t i = 0 ; i < tmpFaces.size(); ++i )
delete tmpFaces[i];
return true;
}
//================================================================================
/*!
* \brief Modify normals of _LayerEdge's on _ConvexFace's
*/
//================================================================================
bool _ViscousBuilder::updateNormalsOfConvexFaces( _SolidData& data,
SMESH_MesherHelper& helper,
int stepNb )
{
SMESHDS_Mesh* meshDS = helper.GetMeshDS();
bool isOK;
map< TGeomID, _ConvexFace >::iterator id2face = data._convexFaces.begin();
for ( ; id2face != data._convexFaces.end(); ++id2face )
{
_ConvexFace & convFace = (*id2face).second;
if ( convFace._normalsFixed )
continue; // already fixed
if ( convFace.CheckPrisms() )
continue; // nothing to fix
convFace._normalsFixed = true;
BRepAdaptor_Surface surface ( convFace._face, false );
BRepLProp_SLProps surfProp( surface, 2, 1e-6 );
// check if the convex FACE is of spherical shape
Bnd_B3d centersBox; // bbox of centers of curvature of _LayerEdge's on VERTEXes
Bnd_B3d nodesBox;
gp_Pnt center;
map< TGeomID, _EdgesOnShape* >::iterator id2eos = convFace._subIdToEOS.begin();
for ( ; id2eos != convFace._subIdToEOS.end(); ++id2eos )
{
_EdgesOnShape& eos = *(id2eos->second);
if ( eos.ShapeType() == TopAbs_VERTEX )
{
_LayerEdge* ledge = eos._edges[ 0 ];
if ( convFace.GetCenterOfCurvature( ledge, surfProp, helper, center ))
centersBox.Add( center );
}
for ( size_t i = 0; i < eos._edges.size(); ++i )
nodesBox.Add( SMESH_TNodeXYZ( eos._edges[ i ]->_nodes[0] ));
}
if ( centersBox.IsVoid() )
{
debugMsg( "Error: centersBox.IsVoid()" );
return false;
}
const bool isSpherical =
( centersBox.SquareExtent() < 1e-6 * nodesBox.SquareExtent() );
int nbEdges = helper.Count( convFace._face, TopAbs_EDGE, /*ignoreSame=*/false );
vector < _CentralCurveOnEdge > centerCurves( nbEdges );
if ( isSpherical )
{
// set _LayerEdge::_normal as average of all normals
// WARNING: different density of nodes on EDGEs is not taken into account that
// can lead to an improper new normal
gp_XYZ avgNormal( 0,0,0 );
nbEdges = 0;
id2eos = convFace._subIdToEOS.begin();
for ( ; id2eos != convFace._subIdToEOS.end(); ++id2eos )
{
_EdgesOnShape& eos = *(id2eos->second);
// set data of _CentralCurveOnEdge
if ( eos.ShapeType() == TopAbs_EDGE )
{
_CentralCurveOnEdge& ceCurve = centerCurves[ nbEdges++ ];
ceCurve.SetShapes( TopoDS::Edge( eos._shape ), convFace, data, helper );
if ( !eos._sWOL.IsNull() )
ceCurve._adjFace.Nullify();
else
ceCurve._ledges.insert( ceCurve._ledges.end(),
eos._edges.begin(), eos._edges.end());
}
// summarize normals
for ( size_t i = 0; i < eos._edges.size(); ++i )
avgNormal += eos._edges[ i ]->_normal;
}
double normSize = avgNormal.SquareModulus();
if ( normSize < 1e-200 )
{
debugMsg( "updateNormalsOfConvexFaces(): zero avgNormal" );
return false;
}
avgNormal /= Sqrt( normSize );
// compute new _LayerEdge::_cosin on EDGEs
double avgCosin = 0;
int nbCosin = 0;
gp_Vec inFaceDir;
for ( size_t iE = 0; iE < centerCurves.size(); ++iE )
{
_CentralCurveOnEdge& ceCurve = centerCurves[ iE ];
if ( ceCurve._adjFace.IsNull() )
continue;
for ( size_t iLE = 0; iLE < ceCurve._ledges.size(); ++iLE )
{
const SMDS_MeshNode* node = ceCurve._ledges[ iLE ]->_nodes[0];
inFaceDir = getFaceDir( ceCurve._adjFace, ceCurve._edge, node, helper, isOK );
if ( isOK )
{
double angle = inFaceDir.Angle( avgNormal ); // [0,PI]
ceCurve._ledges[ iLE ]->_cosin = Cos( angle );
avgCosin += ceCurve._ledges[ iLE ]->_cosin;
nbCosin++;
}
}
}
if ( nbCosin > 0 )
avgCosin /= nbCosin;
// set _LayerEdge::_normal = avgNormal
id2eos = convFace._subIdToEOS.begin();
for ( ; id2eos != convFace._subIdToEOS.end(); ++id2eos )
{
_EdgesOnShape& eos = *(id2eos->second);
if ( eos.ShapeType() != TopAbs_EDGE )
for ( size_t i = 0; i < eos._edges.size(); ++i )
eos._edges[ i ]->_cosin = avgCosin;
for ( size_t i = 0; i < eos._edges.size(); ++i )
eos._edges[ i ]->_normal = avgNormal;
}
}
else // if ( isSpherical )
{
// We suppose that centers of curvature at all points of the FACE
// lie on some curve, let's call it "central curve". For all _LayerEdge's
// having a common center of curvature we define the same new normal
// as a sum of normals of _LayerEdge's on EDGEs among them.
// get all centers of curvature for each EDGE
helper.SetSubShape( convFace._face );
_LayerEdge* vertexLEdges[2], **edgeLEdge, **edgeLEdgeEnd;
TopExp_Explorer edgeExp( convFace._face, TopAbs_EDGE );
for ( int iE = 0; edgeExp.More(); edgeExp.Next(), ++iE )
{
const TopoDS_Edge& edge = TopoDS::Edge( edgeExp.Current() );
// set adjacent FACE
centerCurves[ iE ].SetShapes( edge, convFace, data, helper );
// get _LayerEdge's of the EDGE
TGeomID edgeID = meshDS->ShapeToIndex( edge );
_EdgesOnShape* eos = data.GetShapeEdges( edgeID );
if ( !eos || eos->_edges.empty() )
{
// no _LayerEdge's on EDGE, use _LayerEdge's on VERTEXes
for ( int iV = 0; iV < 2; ++iV )
{
TopoDS_Vertex v = helper.IthVertex( iV, edge );
TGeomID vID = meshDS->ShapeToIndex( v );
eos = data.GetShapeEdges( vID );
vertexLEdges[ iV ] = eos->_edges[ 0 ];
}
edgeLEdge = &vertexLEdges[0];
edgeLEdgeEnd = edgeLEdge + 2;
centerCurves[ iE ]._adjFace.Nullify();
}
else
{
if ( ! eos->_toSmooth )
data.SortOnEdge( edge, eos->_edges, helper );
edgeLEdge = &eos->_edges[ 0 ];
edgeLEdgeEnd = edgeLEdge + eos->_edges.size();
vertexLEdges[0] = eos->_edges.front()->_2neibors->_edges[0];
vertexLEdges[1] = eos->_edges.back() ->_2neibors->_edges[1];
if ( ! eos->_sWOL.IsNull() )
centerCurves[ iE ]._adjFace.Nullify();
}
// Get curvature centers
centersBox.Clear();
if ( edgeLEdge[0]->IsOnEdge() &&
convFace.GetCenterOfCurvature( vertexLEdges[0], surfProp, helper, center ))
{ // 1st VERTEX
centerCurves[ iE ].Append( center, vertexLEdges[0] );
centersBox.Add( center );
}
for ( ; edgeLEdge < edgeLEdgeEnd; ++edgeLEdge )
if ( convFace.GetCenterOfCurvature( *edgeLEdge, surfProp, helper, center ))
{ // EDGE or VERTEXes
centerCurves[ iE ].Append( center, *edgeLEdge );
centersBox.Add( center );
}
if ( edgeLEdge[-1]->IsOnEdge() &&
convFace.GetCenterOfCurvature( vertexLEdges[1], surfProp, helper, center ))
{ // 2nd VERTEX
centerCurves[ iE ].Append( center, vertexLEdges[1] );
centersBox.Add( center );
}
centerCurves[ iE ]._isDegenerated =
( centersBox.IsVoid() || centersBox.SquareExtent() < 1e-6 * nodesBox.SquareExtent() );
} // loop on EDGES of convFace._face to set up data of centerCurves
// Compute new normals for _LayerEdge's on EDGEs
double avgCosin = 0;
int nbCosin = 0;
gp_Vec inFaceDir;
for ( size_t iE1 = 0; iE1 < centerCurves.size(); ++iE1 )
{
_CentralCurveOnEdge& ceCurve = centerCurves[ iE1 ];
if ( ceCurve._isDegenerated )
continue;
const vector< gp_Pnt >& centers = ceCurve._curvaCenters;
vector< gp_XYZ > & newNormals = ceCurve._normals;
for ( size_t iC1 = 0; iC1 < centers.size(); ++iC1 )
{
isOK = false;
for ( size_t iE2 = 0; iE2 < centerCurves.size() && !isOK; ++iE2 )
{
if ( iE1 != iE2 )
isOK = centerCurves[ iE2 ].FindNewNormal( centers[ iC1 ], newNormals[ iC1 ]);
}
if ( isOK && !ceCurve._adjFace.IsNull() )
{
// compute new _LayerEdge::_cosin
const SMDS_MeshNode* node = ceCurve._ledges[ iC1 ]->_nodes[0];
inFaceDir = getFaceDir( ceCurve._adjFace, ceCurve._edge, node, helper, isOK );
if ( isOK )
{
double angle = inFaceDir.Angle( newNormals[ iC1 ] ); // [0,PI]
ceCurve._ledges[ iC1 ]->_cosin = Cos( angle );
avgCosin += ceCurve._ledges[ iC1 ]->_cosin;
nbCosin++;
}
}
}
}
// set new normals to _LayerEdge's of NOT degenerated central curves
for ( size_t iE = 0; iE < centerCurves.size(); ++iE )
{
if ( centerCurves[ iE ]._isDegenerated )
continue;
for ( size_t iLE = 0; iLE < centerCurves[ iE ]._ledges.size(); ++iLE )
centerCurves[ iE ]._ledges[ iLE ]->_normal = centerCurves[ iE ]._normals[ iLE ];
}
// set new normals to _LayerEdge's of degenerated central curves
for ( size_t iE = 0; iE < centerCurves.size(); ++iE )
{
if ( !centerCurves[ iE ]._isDegenerated ||
centerCurves[ iE ]._ledges.size() < 3 )
continue;
// new normal is an average of new normals at VERTEXes that
// was computed on non-degenerated _CentralCurveOnEdge's
gp_XYZ newNorm = ( centerCurves[ iE ]._ledges.front()->_normal +
centerCurves[ iE ]._ledges.back ()->_normal );
double sz = newNorm.Modulus();
if ( sz < 1e-200 )
continue;
newNorm /= sz;
double newCosin = ( 0.5 * centerCurves[ iE ]._ledges.front()->_cosin +
0.5 * centerCurves[ iE ]._ledges.back ()->_cosin );
for ( size_t iLE = 1, nb = centerCurves[ iE ]._ledges.size() - 1; iLE < nb; ++iLE )
{
centerCurves[ iE ]._ledges[ iLE ]->_normal = newNorm;
centerCurves[ iE ]._ledges[ iLE ]->_cosin = newCosin;
}
}
// Find new normals for _LayerEdge's based on FACE
if ( nbCosin > 0 )
avgCosin /= nbCosin;
const TGeomID faceID = meshDS->ShapeToIndex( convFace._face );
map< TGeomID, _EdgesOnShape* >::iterator id2eos = convFace._subIdToEOS.find( faceID );
if ( id2eos != convFace._subIdToEOS.end() )
{
int iE = 0;
gp_XYZ newNorm;
_EdgesOnShape& eos = * ( id2eos->second );
for ( size_t i = 0; i < eos._edges.size(); ++i )
{
_LayerEdge* ledge = eos._edges[ i ];
if ( !convFace.GetCenterOfCurvature( ledge, surfProp, helper, center ))
continue;
for ( size_t i = 0; i < centerCurves.size(); ++i, ++iE )
{
iE = iE % centerCurves.size();
if ( centerCurves[ iE ]._isDegenerated )
continue;
newNorm.SetCoord( 0,0,0 );
if ( centerCurves[ iE ].FindNewNormal( center, newNorm ))
{
ledge->_normal = newNorm;
ledge->_cosin = avgCosin;
break;
}
}
}
}
} // not a quasi-spherical FACE
// Update _LayerEdge's data according to a new normal
dumpFunction(SMESH_Comment("updateNormalsOfConvexFaces")<<data._index
<<"_F"<<meshDS->ShapeToIndex( convFace._face ));
id2eos = convFace._subIdToEOS.begin();
for ( ; id2eos != convFace._subIdToEOS.end(); ++id2eos )
{
_EdgesOnShape& eos = * ( id2eos->second );
for ( size_t i = 0; i < eos._edges.size(); ++i )
{
_LayerEdge* & ledge = eos._edges[ i ];
double len = ledge->_len;
ledge->InvalidateStep( stepNb + 1, eos, /*restoreLength=*/true );
ledge->SetCosin( ledge->_cosin );
ledge->SetNewLength( len, eos, helper );
}
} // loop on sub-shapes of convFace._face
// Find FACEs adjacent to convFace._face that got necessity to smooth
// as a result of normals modification
set< _EdgesOnShape* > adjFacesToSmooth;
for ( size_t iE = 0; iE < centerCurves.size(); ++iE )
{
if ( centerCurves[ iE ]._adjFace.IsNull() ||
centerCurves[ iE ]._adjFaceToSmooth )
continue;
for ( size_t iLE = 0; iLE < centerCurves[ iE ]._ledges.size(); ++iLE )
{
if ( centerCurves[ iE ]._ledges[ iLE ]->_cosin > theMinSmoothCosin )
{
adjFacesToSmooth.insert( data.GetShapeEdges( centerCurves[ iE ]._adjFace ));
break;
}
}
}
data.AddShapesToSmooth( adjFacesToSmooth );
dumpFunctionEnd();
} // loop on data._convexFaces
return true;
}
//================================================================================
/*!
* \brief Finds a center of curvature of a surface at a _LayerEdge
*/
//================================================================================
bool _ConvexFace::GetCenterOfCurvature( _LayerEdge* ledge,
BRepLProp_SLProps& surfProp,
SMESH_MesherHelper& helper,
gp_Pnt & center ) const
{
gp_XY uv = helper.GetNodeUV( _face, ledge->_nodes[0] );
surfProp.SetParameters( uv.X(), uv.Y() );
if ( !surfProp.IsCurvatureDefined() )
return false;
const double oriFactor = ( _face.Orientation() == TopAbs_REVERSED ? +1. : -1. );
double surfCurvatureMax = surfProp.MaxCurvature() * oriFactor;
double surfCurvatureMin = surfProp.MinCurvature() * oriFactor;
if ( surfCurvatureMin > surfCurvatureMax )
center = surfProp.Value().Translated( surfProp.Normal().XYZ() / surfCurvatureMin * oriFactor );
else
center = surfProp.Value().Translated( surfProp.Normal().XYZ() / surfCurvatureMax * oriFactor );
return true;
}
//================================================================================
/*!
* \brief Check that prisms are not distorted
*/
//================================================================================
bool _ConvexFace::CheckPrisms() const
{
double vol = 0;
for ( size_t i = 0; i < _simplexTestEdges.size(); ++i )
{
const _LayerEdge* edge = _simplexTestEdges[i];
SMESH_TNodeXYZ tgtXYZ( edge->_nodes.back() );
for ( size_t j = 0; j < edge->_simplices.size(); ++j )
if ( !edge->_simplices[j].IsForward( edge->_nodes[0], &tgtXYZ, vol ))
{
debugMsg( "Bad simplex of _simplexTestEdges ("
<< " "<< edge->_nodes[0]->GetID()<< " "<< tgtXYZ._node->GetID()
<< " "<< edge->_simplices[j]._nPrev->GetID()
<< " "<< edge->_simplices[j]._nNext->GetID() << " )" );
return false;
}
}
return true;
}
//================================================================================
/*!
* \brief Try to compute a new normal by interpolating normals of _LayerEdge's
* stored in this _CentralCurveOnEdge.
* \param [in] center - curvature center of a point of another _CentralCurveOnEdge.
* \param [in,out] newNormal - current normal at this point, to be redefined
* \return bool - true if succeeded.
*/
//================================================================================
bool _CentralCurveOnEdge::FindNewNormal( const gp_Pnt& center, gp_XYZ& newNormal )
{
if ( this->_isDegenerated )
return false;
// find two centers the given one lies between
for ( size_t i = 0, nb = _curvaCenters.size()-1; i < nb; ++i )
{
double sl2 = 1.001 * _segLength2[ i ];
double d1 = center.SquareDistance( _curvaCenters[ i ]);
if ( d1 > sl2 )
continue;
double d2 = center.SquareDistance( _curvaCenters[ i+1 ]);
if ( d2 > sl2 || d2 + d1 < 1e-100 )
continue;
d1 = Sqrt( d1 );
d2 = Sqrt( d2 );
double r = d1 / ( d1 + d2 );
gp_XYZ norm = (( 1. - r ) * _ledges[ i ]->_normal +
( r ) * _ledges[ i+1 ]->_normal );
norm.Normalize();
newNormal += norm;
double sz = newNormal.Modulus();
if ( sz < 1e-200 )
break;
newNormal /= sz;
return true;
}
return false;
}
//================================================================================
/*!
* \brief Set shape members
*/
//================================================================================
void _CentralCurveOnEdge::SetShapes( const TopoDS_Edge& edge,
const _ConvexFace& convFace,
_SolidData& data,
SMESH_MesherHelper& helper)
{
_edge = edge;
PShapeIteratorPtr fIt = helper.GetAncestors( edge, *helper.GetMesh(), TopAbs_FACE );
while ( const TopoDS_Shape* F = fIt->next())
if ( !convFace._face.IsSame( *F ))
{
_adjFace = TopoDS::Face( *F );
_adjFaceToSmooth = false;
// _adjFace already in a smoothing queue ?
if ( _EdgesOnShape* eos = data.GetShapeEdges( _adjFace ))
_adjFaceToSmooth = eos->_toSmooth;
break;
}
}
//================================================================================
/*!
* \brief Looks for intersection of it's last segment with faces
* \param distance - returns shortest distance from the last node to intersection
*/
//================================================================================
bool _LayerEdge::FindIntersection( SMESH_ElementSearcher& searcher,
double & distance,
const double& epsilon,
_EdgesOnShape& eos,
const SMDS_MeshElement** face)
{
vector< const SMDS_MeshElement* > suspectFaces;
double segLen;
gp_Ax1 lastSegment = LastSegment( segLen, eos );
searcher.GetElementsNearLine( lastSegment, SMDSAbs_Face, suspectFaces );
bool segmentIntersected = false;
distance = Precision::Infinite();
int iFace = -1; // intersected face
for ( size_t j = 0 ; j < suspectFaces.size() /*&& !segmentIntersected*/; ++j )
{
const SMDS_MeshElement* face = suspectFaces[j];
if ( face->GetNodeIndex( _nodes.back() ) >= 0 ||
face->GetNodeIndex( _nodes[0] ) >= 0 )
continue; // face sharing _LayerEdge node
const int nbNodes = face->NbCornerNodes();
bool intFound = false;
double dist;
SMDS_MeshElement::iterator nIt = face->begin_nodes();
if ( nbNodes == 3 )
{
intFound = SegTriaInter( lastSegment, *nIt++, *nIt++, *nIt++, dist, epsilon );
}
else
{
const SMDS_MeshNode* tria[3];
tria[0] = *nIt++;
tria[1] = *nIt++;
for ( int n2 = 2; n2 < nbNodes && !intFound; ++n2 )
{
tria[2] = *nIt++;
intFound = SegTriaInter(lastSegment, tria[0], tria[1], tria[2], dist, epsilon );
tria[1] = tria[2];
}
}
if ( intFound )
{
if ( dist < segLen*(1.01) && dist > -(_len*_lenFactor-segLen) )
segmentIntersected = true;
if ( distance > dist )
distance = dist, iFace = j;
}
}
if ( iFace != -1 && face ) *face = suspectFaces[iFace];
if ( segmentIntersected )
{
#ifdef __myDEBUG
SMDS_MeshElement::iterator nIt = suspectFaces[iFace]->begin_nodes();
gp_XYZ intP( lastSegment.Location().XYZ() + lastSegment.Direction().XYZ() * distance );
cout << "nodes: tgt " << _nodes.back()->GetID() << " src " << _nodes[0]->GetID()
<< ", intersection with face ("
<< (*nIt++)->GetID()<<" "<< (*nIt++)->GetID()<<" "<< (*nIt++)->GetID()
<< ") at point (" << intP.X() << ", " << intP.Y() << ", " << intP.Z()
<< ") distance = " << distance - segLen<< endl;
#endif
}
distance -= segLen;
return segmentIntersected;
}
//================================================================================
/*!
* \brief Returns size and direction of the last segment
*/
//================================================================================
gp_Ax1 _LayerEdge::LastSegment(double& segLen, _EdgesOnShape& eos) const
{
// find two non-coincident positions
gp_XYZ orig = _pos.back();
gp_XYZ dir;
int iPrev = _pos.size() - 2;
const double tol = ( _len > 0 ) ? 0.3*_len : 1e-100; // adjusted for IPAL52478 + PAL22576
while ( iPrev >= 0 )
{
dir = orig - _pos[iPrev];
if ( dir.SquareModulus() > tol*tol )
break;
else
iPrev--;
}
// make gp_Ax1
gp_Ax1 segDir;
if ( iPrev < 0 )
{
segDir.SetLocation( SMESH_TNodeXYZ( _nodes[0] ));
segDir.SetDirection( _normal );
segLen = 0;
}
else
{
gp_Pnt pPrev = _pos[ iPrev ];
if ( !eos._sWOL.IsNull() )
{
TopLoc_Location loc;
if ( eos.SWOLType() == TopAbs_EDGE )
{
double f,l;
Handle(Geom_Curve) curve = BRep_Tool::Curve( TopoDS::Edge( eos._sWOL ), loc, f,l);
pPrev = curve->Value( pPrev.X() ).Transformed( loc );
}
else
{
Handle(Geom_Surface) surface = BRep_Tool::Surface( TopoDS::Face( eos._sWOL ), loc );
pPrev = surface->Value( pPrev.X(), pPrev.Y() ).Transformed( loc );
}
dir = SMESH_TNodeXYZ( _nodes.back() ) - pPrev.XYZ();
}
segDir.SetLocation( pPrev );
segDir.SetDirection( dir );
segLen = dir.Modulus();
}
return segDir;
}
//================================================================================
/*!
* \brief Return the last position of the target node on a FACE.
* \param [in] F - the FACE this _LayerEdge is inflated along
* \return gp_XY - result UV
*/
//================================================================================
gp_XY _LayerEdge::LastUV( const TopoDS_Face& F, _EdgesOnShape& eos ) const
{
if ( F.IsSame( eos._sWOL )) // F is my FACE
return gp_XY( _pos.back().X(), _pos.back().Y() );
if ( eos.SWOLType() != TopAbs_EDGE ) // wrong call
return gp_XY( 1e100, 1e100 );
// _sWOL is EDGE of F; _pos.back().X() is the last U on the EDGE
double f, l, u = _pos.back().X();
Handle(Geom2d_Curve) C2d = BRep_Tool::CurveOnSurface( TopoDS::Edge(eos._sWOL), F, f,l);
if ( !C2d.IsNull() && f <= u && u <= l )
return C2d->Value( u ).XY();
return gp_XY( 1e100, 1e100 );
}
//================================================================================
/*!
* \brief Test intersection of the last segment with a given triangle
* using Moller-Trumbore algorithm
* Intersection is detected if distance to intersection is less than _LayerEdge._len
*/
//================================================================================
bool _LayerEdge::SegTriaInter( const gp_Ax1& lastSegment,
const SMDS_MeshNode* n0,
const SMDS_MeshNode* n1,
const SMDS_MeshNode* n2,
double& t,
const double& EPSILON) const
{
//const double EPSILON = 1e-6;
const gp_Pnt& orig = lastSegment.Location();
const gp_Dir& dir = lastSegment.Direction();
SMESH_TNodeXYZ vert0( n0 );
SMESH_TNodeXYZ vert1( n1 );
SMESH_TNodeXYZ vert2( n2 );
/* calculate distance from vert0 to ray origin */
gp_XYZ tvec = orig.XYZ() - vert0;
//if ( tvec * dir > EPSILON )
// intersected face is at back side of the temporary face this _LayerEdge belongs to
//return false;
gp_XYZ edge1 = vert1 - vert0;
gp_XYZ edge2 = vert2 - vert0;
/* begin calculating determinant - also used to calculate U parameter */
gp_XYZ pvec = dir.XYZ() ^ edge2;
/* if determinant is near zero, ray lies in plane of triangle */
double det = edge1 * pvec;
if (det > -EPSILON && det < EPSILON)
return false;
/* calculate U parameter and test bounds */
double u = ( tvec * pvec ) / det;
//if (u < 0.0 || u > 1.0)
if (u < -EPSILON || u > 1.0 + EPSILON)
return false;
/* prepare to test V parameter */
gp_XYZ qvec = tvec ^ edge1;
/* calculate V parameter and test bounds */
double v = (dir.XYZ() * qvec) / det;
//if ( v < 0.0 || u + v > 1.0 )
if ( v < -EPSILON || u + v > 1.0 + EPSILON)
return false;
/* calculate t, ray intersects triangle */
t = (edge2 * qvec) / det;
//return true;
return t > 0.;
}
//================================================================================
/*!
* \brief Perform smooth of _LayerEdge's based on EDGE's
* \retval bool - true if node has been moved
*/
//================================================================================
bool _LayerEdge::SmoothOnEdge(Handle(Geom_Surface)& surface,
const TopoDS_Face& F,
SMESH_MesherHelper& helper)
{
ASSERT( IsOnEdge() );
SMDS_MeshNode* tgtNode = const_cast<SMDS_MeshNode*>( _nodes.back() );
SMESH_TNodeXYZ oldPos( tgtNode );
double dist01, distNewOld;
SMESH_TNodeXYZ p0( _2neibors->tgtNode(0));
SMESH_TNodeXYZ p1( _2neibors->tgtNode(1));
dist01 = p0.Distance( _2neibors->tgtNode(1) );
gp_Pnt newPos = p0 * _2neibors->_wgt[0] + p1 * _2neibors->_wgt[1];
double lenDelta = 0;
if ( _curvature )
{
//lenDelta = _curvature->lenDelta( _len );
lenDelta = _curvature->lenDeltaByDist( dist01 );
newPos.ChangeCoord() += _normal * lenDelta;
}
distNewOld = newPos.Distance( oldPos );
if ( F.IsNull() )
{
if ( _2neibors->_plnNorm )
{
// put newPos on the plane defined by source node and _plnNorm
gp_XYZ new2src = SMESH_TNodeXYZ( _nodes[0] ) - newPos.XYZ();
double new2srcProj = (*_2neibors->_plnNorm) * new2src;
newPos.ChangeCoord() += (*_2neibors->_plnNorm) * new2srcProj;
}
tgtNode->setXYZ( newPos.X(), newPos.Y(), newPos.Z() );
_pos.back() = newPos.XYZ();
}
else
{
tgtNode->setXYZ( newPos.X(), newPos.Y(), newPos.Z() );
gp_XY uv( Precision::Infinite(), 0 );
helper.CheckNodeUV( F, tgtNode, uv, 1e-10, /*force=*/true );
_pos.back().SetCoord( uv.X(), uv.Y(), 0 );
newPos = surface->Value( uv.X(), uv.Y() );
tgtNode->setXYZ( newPos.X(), newPos.Y(), newPos.Z() );
}
// commented for IPAL0052478
// if ( _curvature && lenDelta < 0 )
// {
// gp_Pnt prevPos( _pos[ _pos.size()-2 ]);
// _len -= prevPos.Distance( oldPos );
// _len += prevPos.Distance( newPos );
// }
bool moved = distNewOld > dist01/50;
//if ( moved )
dumpMove( tgtNode ); // debug
return moved;
}
//================================================================================
/*!
* \brief Perform laplacian smooth in 3D of nodes inflated from FACE
* \retval bool - true if _tgtNode has been moved
*/
//================================================================================
int _LayerEdge::Smooth(const int step, const bool isConcaveFace, const bool findBest )
{
if ( _simplices.size() < 2 )
return 0; // _LayerEdge inflated along EDGE or FACE
const gp_XYZ& curPos ( _pos.back() );
const gp_XYZ& prevPos( _pos[ _pos.size()-2 ]);
// quality metrics (orientation) of tetras around _tgtNode
int nbOkBefore = 0;
double vol, minVolBefore = 1e100;
for ( size_t i = 0; i < _simplices.size(); ++i )
{
nbOkBefore += _simplices[i].IsForward( _nodes[0], &curPos, vol );
minVolBefore = Min( minVolBefore, vol );
}
int nbBad = _simplices.size() - nbOkBefore;
// compute new position for the last _pos using different _funs
gp_XYZ newPos;
for ( int iFun = -1; iFun < theNbSmooFuns; ++iFun )
{
if ( iFun < 0 )
newPos = (this->*_smooFunction)(); // fun chosen by ChooseSmooFunction()
else if ( _funs[ iFun ] == _smooFunction )
continue; // _smooFunction again
else if ( step > 0 )
newPos = (this->*_funs[ iFun ])(); // try other smoothing fun
else
break; // let "easy" functions improve elements around distorted ones
if ( _curvature )
{
double delta = _curvature->lenDelta( _len );
if ( delta > 0 )
newPos += _normal * delta;
else
{
double segLen = _normal * ( newPos - prevPos );
if ( segLen + delta > 0 )
newPos += _normal * delta;
}
// double segLenChange = _normal * ( curPos - newPos );
// newPos += 0.5 * _normal * segLenChange;
}
int nbOkAfter = 0;
double minVolAfter = 1e100;
for ( size_t i = 0; i < _simplices.size(); ++i )
{
nbOkAfter += _simplices[i].IsForward( _nodes[0], &newPos, vol );
minVolAfter = Min( minVolAfter, vol );
}
// get worse?
if ( nbOkAfter < nbOkBefore )
continue;
if (( isConcaveFace || findBest ) &&
( nbOkAfter == nbOkBefore ) &&
//( iFun > -1 || nbOkAfter < _simplices.size() ) &&
( minVolAfter <= minVolBefore ))
continue;
SMDS_MeshNode* n = const_cast< SMDS_MeshNode* >( _nodes.back() );
// commented for IPAL0052478
// _len -= prevPos.Distance(SMESH_TNodeXYZ( n ));
// _len += prevPos.Distance(newPos);
n->setXYZ( newPos.X(), newPos.Y(), newPos.Z());
_pos.back() = newPos;
dumpMoveComm( n, _funNames[ iFun < 0 ? smooFunID() : iFun ]);
nbBad = _simplices.size() - nbOkAfter;
if ( iFun > -1 )
{
//_smooFunction = _funs[ iFun ];
// cout << "# " << _funNames[ iFun ] << "\t N:" << _nodes.back()->GetID()
// << "\t nbBad: " << _simplices.size() - nbOkAfter
// << " minVol: " << minVolAfter
// << " " << newPos.X() << " " << newPos.Y() << " " << newPos.Z()
// << endl;
minVolBefore = minVolAfter;
nbOkBefore = nbOkAfter;
continue; // look for a better function
}
if ( !findBest )
break;
} // loop on smoothing functions
return nbBad;
}
//================================================================================
/*!
* \brief Chooses a smoothing technic giving a position most close to an initial one.
* For a correct result, _simplices must contain nodes lying on geometry.
*/
//================================================================================
void _LayerEdge::ChooseSmooFunction( const set< TGeomID >& concaveVertices,
const TNode2Edge& n2eMap)
{
if ( _smooFunction ) return;
// use smoothNefPolygon() near concaveVertices
if ( !concaveVertices.empty() )
{
for ( size_t i = 0; i < _simplices.size(); ++i )
{
if ( concaveVertices.count( _simplices[i]._nPrev->getshapeId() ))
{
_smooFunction = _funs[ FUN_NEFPOLY ];
// set FUN_CENTROIDAL to neighbor edges
TNode2Edge::const_iterator n2e;
for ( i = 0; i < _simplices.size(); ++i )
{
if (( _simplices[i]._nPrev->GetPosition()->GetDim() == 2 ) &&
(( n2e = n2eMap.find( _simplices[i]._nPrev )) != n2eMap.end() ))
{
n2e->second->_smooFunction = _funs[ FUN_CENTROIDAL ];
}
}
return;
}
}
//}
// this coice is done only if ( !concaveVertices.empty() ) for Grids/smesh/bugs_19/X1
// where the nodes are smoothed too far along a sphere thus creating
// inverted _simplices
double dist[theNbSmooFuns];
//double coef[theNbSmooFuns] = { 1., 1.2, 1.4, 1.4 };
double coef[theNbSmooFuns] = { 1., 1., 1., 1. };
double minDist = Precision::Infinite();
gp_Pnt p = SMESH_TNodeXYZ( _nodes[0] );
for ( int i = 0; i < FUN_NEFPOLY; ++i )
{
gp_Pnt newP = (this->*_funs[i])();
dist[i] = p.SquareDistance( newP );
if ( dist[i]*coef[i] < minDist )
{
_smooFunction = _funs[i];
minDist = dist[i]*coef[i];
}
}
}
else
{
_smooFunction = _funs[ FUN_LAPLACIAN ];
}
// int minDim = 3;
// for ( size_t i = 0; i < _simplices.size(); ++i )
// minDim = Min( minDim, _simplices[i]._nPrev->GetPosition()->GetDim() );
// if ( minDim == 0 )
// _smooFunction = _funs[ FUN_CENTROIDAL ];
// else if ( minDim == 1 )
// _smooFunction = _funs[ FUN_CENTROIDAL ];
// int iMin;
// for ( int i = 0; i < FUN_NB; ++i )
// {
// //cout << dist[i] << " ";
// if ( _smooFunction == _funs[i] ) {
// iMin = i;
// //debugMsg( fNames[i] );
// break;
// }
// }
// cout << _funNames[ iMin ] << "\t N:" << _nodes.back()->GetID() << endl;
}
//================================================================================
/*!
* \brief Returns a name of _SmooFunction
*/
//================================================================================
int _LayerEdge::smooFunID( _LayerEdge::PSmooFun fun) const
{
if ( !fun )
fun = _smooFunction;
for ( int i = 0; i < theNbSmooFuns; ++i )
if ( fun == _funs[i] )
return i;
return theNbSmooFuns;
}
//================================================================================
/*!
* \brief Computes a new node position using Laplacian smoothing
*/
//================================================================================
gp_XYZ _LayerEdge::smoothLaplacian()
{
gp_XYZ newPos (0,0,0);
for ( size_t i = 0; i < _simplices.size(); ++i )
newPos += SMESH_TNodeXYZ( _simplices[i]._nPrev );
newPos /= _simplices.size();
return newPos;
}
//================================================================================
/*!
* \brief Computes a new node position using angular-based smoothing
*/
//================================================================================
gp_XYZ _LayerEdge::smoothAngular()
{
vector< gp_Vec > edgeDir; edgeDir. reserve( _simplices.size() + 1);
vector< double > edgeSize; edgeSize.reserve( _simplices.size() );
vector< gp_XYZ > points; points. reserve( _simplices.size() );
gp_XYZ pPrev = SMESH_TNodeXYZ( _simplices.back()._nPrev );
gp_XYZ pN( 0,0,0 );
for ( size_t i = 0; i < _simplices.size(); ++i )
{
gp_XYZ p = SMESH_TNodeXYZ( _simplices[i]._nPrev );
edgeDir.push_back( p - pPrev );
edgeSize.push_back( edgeDir.back().Magnitude() );
//double edgeSize = edgeDir.back().Magnitude();
if ( edgeSize.back() < numeric_limits<double>::min() )
{
edgeDir.pop_back();
edgeSize.pop_back();
}
else
{
edgeDir.back() /= edgeSize.back();
points.push_back( p );
pN += p;
}
pPrev = p;
}
edgeDir.push_back ( edgeDir[0] );
edgeSize.push_back( edgeSize[0] );
pN /= points.size();
gp_XYZ newPos(0,0,0);
//gp_XYZ pN = SMESH_TNodeXYZ( _nodes.back() );
double sumSize = 0;
for ( size_t i = 0; i < points.size(); ++i )
{
gp_Vec toN( pN - points[i]);
double toNLen = toN.Magnitude();
if ( toNLen < numeric_limits<double>::min() )
{
newPos += pN;
continue;
}
gp_Vec bisec = edgeDir[i] + edgeDir[i+1];
double bisecLen = bisec.SquareMagnitude();
if ( bisecLen < numeric_limits<double>::min() )
{
gp_Vec norm = edgeDir[i] ^ toN;
bisec = norm ^ edgeDir[i];
bisecLen = bisec.SquareMagnitude();
}
bisecLen = Sqrt( bisecLen );
bisec /= bisecLen;
#if 1
//bisecLen = 1.;
gp_XYZ pNew = ( points[i] + bisec.XYZ() * toNLen ) * bisecLen;
sumSize += bisecLen;
#else
gp_XYZ pNew = ( points[i] + bisec.XYZ() * toNLen ) * ( edgeSize[i] + edgeSize[i+1] );
sumSize += ( edgeSize[i] + edgeSize[i+1] );
#endif
newPos += pNew;
}
newPos /= sumSize;
return newPos;
}
//================================================================================
/*!
* \brief Computes a new node position using weigthed node positions
*/
//================================================================================
gp_XYZ _LayerEdge::smoothLengthWeighted()
{
vector< double > edgeSize; edgeSize.reserve( _simplices.size() + 1);
vector< gp_XYZ > points; points. reserve( _simplices.size() );
gp_XYZ pPrev = SMESH_TNodeXYZ( _simplices.back()._nPrev );
for ( size_t i = 0; i < _simplices.size(); ++i )
{
gp_XYZ p = SMESH_TNodeXYZ( _simplices[i]._nPrev );
edgeSize.push_back( ( p - pPrev ).Modulus() );
if ( edgeSize.back() < numeric_limits<double>::min() )
{
edgeSize.pop_back();
}
else
{
points.push_back( p );
}
pPrev = p;
}
edgeSize.push_back( edgeSize[0] );
gp_XYZ newPos(0,0,0);
double sumSize = 0;
for ( size_t i = 0; i < points.size(); ++i )
{
newPos += points[i] * ( edgeSize[i] + edgeSize[i+1] );
sumSize += edgeSize[i] + edgeSize[i+1];
}
newPos /= sumSize;
return newPos;
}
//================================================================================
/*!
* \brief Computes a new node position using angular-based smoothing
*/
//================================================================================
gp_XYZ _LayerEdge::smoothCentroidal()
{
gp_XYZ newPos(0,0,0);
gp_XYZ pN = SMESH_TNodeXYZ( _nodes.back() );
double sumSize = 0;
for ( size_t i = 0; i < _simplices.size(); ++i )
{
gp_XYZ p1 = SMESH_TNodeXYZ( _simplices[i]._nPrev );
gp_XYZ p2 = SMESH_TNodeXYZ( _simplices[i]._nNext );
gp_XYZ gc = ( pN + p1 + p2 ) / 3.;
double size = (( p1 - pN ) ^ ( p2 - pN )).Modulus();
sumSize += size;
newPos += gc * size;
}
newPos /= sumSize;
return newPos;
}
//================================================================================
/*!
* \brief Computes a new node position located inside a Nef polygon
*/
//================================================================================
gp_XYZ _LayerEdge::smoothNefPolygon()
{
gp_XYZ newPos(0,0,0);
// get a plane to seach a solution on
vector< gp_XYZ > vecs( _simplices.size() + 1 );
size_t i;
const double tol = numeric_limits<double>::min();
gp_XYZ center(0,0,0);
for ( i = 0; i < _simplices.size(); ++i )
{
vecs[i] = ( SMESH_TNodeXYZ( _simplices[i]._nNext ) -
SMESH_TNodeXYZ( _simplices[i]._nPrev ));
center += SMESH_TNodeXYZ( _simplices[i]._nPrev );
}
vecs.back() = vecs[0];
center /= _simplices.size();
gp_XYZ zAxis(0,0,0);
for ( i = 0; i < _simplices.size(); ++i )
zAxis += vecs[i] ^ vecs[i+1];
gp_XYZ yAxis;
for ( i = 0; i < _simplices.size(); ++i )
{
yAxis = vecs[i];
if ( yAxis.SquareModulus() > tol )
break;
}
gp_XYZ xAxis = yAxis ^ zAxis;
// SMESH_TNodeXYZ p0( _simplices[0]._nPrev );
// const double tol = 1e-6 * ( p0.Distance( _simplices[1]._nPrev ) +
// p0.Distance( _simplices[2]._nPrev ));
// gp_XYZ center = smoothLaplacian();
// gp_XYZ xAxis, yAxis, zAxis;
// for ( i = 0; i < _simplices.size(); ++i )
// {
// xAxis = SMESH_TNodeXYZ( _simplices[i]._nPrev ) - center;
// if ( xAxis.SquareModulus() > tol*tol )
// break;
// }
// for ( i = 1; i < _simplices.size(); ++i )
// {
// yAxis = SMESH_TNodeXYZ( _simplices[i]._nPrev ) - center;
// zAxis = xAxis ^ yAxis;
// if ( zAxis.SquareModulus() > tol*tol )
// break;
// }
// if ( i == _simplices.size() ) return newPos;
yAxis = zAxis ^ xAxis;
xAxis /= xAxis.Modulus();
yAxis /= yAxis.Modulus();
// get half-planes of _simplices
vector< _halfPlane > halfPlns( _simplices.size() );
int nbHP = 0;
for ( size_t i = 0; i < _simplices.size(); ++i )
{
gp_XYZ OP1 = SMESH_TNodeXYZ( _simplices[i]._nPrev ) - center;
gp_XYZ OP2 = SMESH_TNodeXYZ( _simplices[i]._nNext ) - center;
gp_XY p1( OP1 * xAxis, OP1 * yAxis );
gp_XY p2( OP2 * xAxis, OP2 * yAxis );
gp_XY vec12 = p2 - p1;
double dist12 = vec12.Modulus();
if ( dist12 < tol )
continue;
vec12 /= dist12;
halfPlns[ nbHP ]._pos = p1;
halfPlns[ nbHP ]._dir = vec12;
halfPlns[ nbHP ]._inNorm.SetCoord( -vec12.Y(), vec12.X() );
++nbHP;
}
// intersect boundaries of half-planes, define state of intersection points
// in relation to all half-planes and calculate internal point of a 2D polygon
double sumLen = 0;
gp_XY newPos2D (0,0);
enum { UNDEF = -1, NOT_OUT, IS_OUT, NO_INT };
typedef std::pair< gp_XY, int > TIntPntState; // coord and isOut state
TIntPntState undefIPS( gp_XY(1e100,1e100), UNDEF );
vector< vector< TIntPntState > > allIntPnts( nbHP );
for ( int iHP1 = 0; iHP1 < nbHP; ++iHP1 )
{
vector< TIntPntState > & intPnts1 = allIntPnts[ iHP1 ];
if ( intPnts1.empty() ) intPnts1.resize( nbHP, undefIPS );
int iPrev = SMESH_MesherHelper::WrapIndex( iHP1 - 1, nbHP );
int iNext = SMESH_MesherHelper::WrapIndex( iHP1 + 1, nbHP );
int nbNotOut = 0;
const gp_XY* segEnds[2] = { 0, 0 }; // NOT_OUT points
for ( int iHP2 = 0; iHP2 < nbHP; ++iHP2 )
{
if ( iHP1 == iHP2 ) continue;
TIntPntState & ips1 = intPnts1[ iHP2 ];
if ( ips1.second == UNDEF )
{
// find an intersection point of boundaries of iHP1 and iHP2
if ( iHP2 == iPrev ) // intersection with neighbors is known
ips1.first = halfPlns[ iHP1 ]._pos;
else if ( iHP2 == iNext )
ips1.first = halfPlns[ iHP2 ]._pos;
else if ( !halfPlns[ iHP1 ].FindInterestion( halfPlns[ iHP2 ], ips1.first ))
ips1.second = NO_INT;
// classify the found intersection point
if ( ips1.second != NO_INT )
{
ips1.second = NOT_OUT;
for ( int i = 0; i < nbHP && ips1.second == NOT_OUT; ++i )
if ( i != iHP1 && i != iHP2 &&
halfPlns[ i ].IsOut( ips1.first, tol ))
ips1.second = IS_OUT;
}
vector< TIntPntState > & intPnts2 = allIntPnts[ iHP2 ];
if ( intPnts2.empty() ) intPnts2.resize( nbHP, undefIPS );
TIntPntState & ips2 = intPnts2[ iHP1 ];
ips2 = ips1;
}
if ( ips1.second == NOT_OUT )
{
++nbNotOut;
segEnds[ bool(segEnds[0]) ] = & ips1.first;
}
}
// find a NOT_OUT segment of boundary which is located between
// two NOT_OUT int points
if ( nbNotOut < 2 )
continue; // no such a segment
if ( nbNotOut > 2 )
{
// sort points along the boundary
map< double, TIntPntState* > ipsByParam;
for ( int iHP2 = 0; iHP2 < nbHP; ++iHP2 )
{
TIntPntState & ips1 = intPnts1[ iHP2 ];
if ( ips1.second != NO_INT )
{
gp_XY op = ips1.first - halfPlns[ iHP1 ]._pos;
double param = op * halfPlns[ iHP1 ]._dir;
ipsByParam.insert( make_pair( param, & ips1 ));
}
}
// look for two neighboring NOT_OUT points
nbNotOut = 0;
map< double, TIntPntState* >::iterator u2ips = ipsByParam.begin();
for ( ; u2ips != ipsByParam.end(); ++u2ips )
{
TIntPntState & ips1 = *(u2ips->second);
if ( ips1.second == NOT_OUT )
segEnds[ bool( nbNotOut++ ) ] = & ips1.first;
else if ( nbNotOut >= 2 )
break;
else
nbNotOut = 0;
}
}
if ( nbNotOut >= 2 )
{
double len = ( *segEnds[0] - *segEnds[1] ).Modulus();
sumLen += len;
newPos2D += 0.5 * len * ( *segEnds[0] + *segEnds[1] );
}
}
if ( sumLen > 0 )
{
newPos2D /= sumLen;
newPos = center + xAxis * newPos2D.X() + yAxis * newPos2D.Y();
}
else
{
newPos = center;
}
return newPos;
}
//================================================================================
/*!
* \brief Add a new segment to _LayerEdge during inflation
*/
//================================================================================
void _LayerEdge::SetNewLength( double len, _EdgesOnShape& eos, SMESH_MesherHelper& helper )
{
if ( _len - len > -1e-6 )
{
//_pos.push_back( _pos.back() );
return;
}
SMDS_MeshNode* n = const_cast< SMDS_MeshNode*>( _nodes.back() );
gp_XYZ oldXYZ = SMESH_TNodeXYZ( n );
gp_XYZ newXYZ;
if ( eos._hyp.IsOffsetMethod() )
{
newXYZ = oldXYZ;
gp_Vec faceNorm;
SMDS_ElemIteratorPtr faceIt = _nodes[0]->GetInverseElementIterator( SMDSAbs_Face );
while ( faceIt->more() )
{
const SMDS_MeshElement* face = faceIt->next();
if ( !eos.GetNormal( face, faceNorm ))
continue;
// translate plane of a face
gp_XYZ baryCenter = oldXYZ + faceNorm.XYZ() * ( len - _len );
// find point of intersection of the face plane located at baryCenter
// and _normal located at newXYZ
double d = -( faceNorm.XYZ() * baryCenter ); // d of plane equation ax+by+cz+d=0
double dot = ( faceNorm.XYZ() * _normal );
if ( dot < std::numeric_limits<double>::min() )
dot = ( len - _len ) * 1e-3;
double step = -( faceNorm.XYZ() * newXYZ + d ) / dot;
newXYZ += step * _normal;
}
}
else
{
newXYZ = oldXYZ + _normal * ( len - _len ) * _lenFactor;
}
n->setXYZ( newXYZ.X(), newXYZ.Y(), newXYZ.Z() );
_pos.push_back( newXYZ );
_len = len;
if ( !eos._sWOL.IsNull() )
{
double distXYZ[4];
if ( eos.SWOLType() == TopAbs_EDGE )
{
double u = Precision::Infinite(); // to force projection w/o distance check
helper.CheckNodeU( TopoDS::Edge( eos._sWOL ), n, u, 1e-10, /*force=*/true, distXYZ );
_pos.back().SetCoord( u, 0, 0 );
if ( _nodes.size() > 1 )
{
SMDS_EdgePosition* pos = static_cast<SMDS_EdgePosition*>( n->GetPosition() );
pos->SetUParameter( u );
}
}
else // TopAbs_FACE
{
gp_XY uv( Precision::Infinite(), 0 );
helper.CheckNodeUV( TopoDS::Face( eos._sWOL ), n, uv, 1e-10, /*force=*/true, distXYZ );
_pos.back().SetCoord( uv.X(), uv.Y(), 0 );
if ( _nodes.size() > 1 )
{
SMDS_FacePosition* pos = static_cast<SMDS_FacePosition*>( n->GetPosition() );
pos->SetUParameter( uv.X() );
pos->SetVParameter( uv.Y() );
}
}
n->setXYZ( distXYZ[1], distXYZ[2], distXYZ[3]);
}
dumpMove( n ); //debug
}
//================================================================================
/*!
* \brief Remove last inflation step
*/
//================================================================================
void _LayerEdge::InvalidateStep( int curStep, const _EdgesOnShape& eos, bool restoreLength )
{
if ( _pos.size() > curStep )
{
if ( restoreLength )
_len -= ( _pos[ curStep-1 ] - _pos.back() ).Modulus();
_pos.resize( curStep );
gp_Pnt nXYZ = _pos.back();
SMDS_MeshNode* n = const_cast< SMDS_MeshNode*>( _nodes.back() );
if ( !eos._sWOL.IsNull() )
{
TopLoc_Location loc;
if ( eos.SWOLType() == TopAbs_EDGE )
{
SMDS_EdgePosition* pos = static_cast<SMDS_EdgePosition*>( n->GetPosition() );
pos->SetUParameter( nXYZ.X() );
double f,l;
Handle(Geom_Curve) curve = BRep_Tool::Curve( TopoDS::Edge( eos._sWOL ), loc, f,l);
nXYZ = curve->Value( nXYZ.X() ).Transformed( loc );
}
else
{
SMDS_FacePosition* pos = static_cast<SMDS_FacePosition*>( n->GetPosition() );
pos->SetUParameter( nXYZ.X() );
pos->SetVParameter( nXYZ.Y() );
Handle(Geom_Surface) surface = BRep_Tool::Surface( TopoDS::Face(eos._sWOL), loc );
nXYZ = surface->Value( nXYZ.X(), nXYZ.Y() ).Transformed( loc );
}
}
n->setXYZ( nXYZ.X(), nXYZ.Y(), nXYZ.Z() );
dumpMove( n );
}
}
//================================================================================
/*!
* \brief Create layers of prisms
*/
//================================================================================
bool _ViscousBuilder::refine(_SolidData& data)
{
SMESH_MesherHelper helper( *_mesh );
helper.SetSubShape( data._solid );
helper.SetElementsOnShape(false);
Handle(Geom_Curve) curve;
Handle(Geom_Surface) surface;
TopoDS_Edge geomEdge;
TopoDS_Face geomFace;
TopoDS_Shape prevSWOL;
TopLoc_Location loc;
double f,l, u;
gp_XY uv;
bool isOnEdge;
TGeomID prevBaseId = -1;
TNode2Edge* n2eMap = 0;
TNode2Edge::iterator n2e;
// Create intermediate nodes on each _LayerEdge
for ( size_t iS = 0; iS < data._edgesOnShape.size(); ++iS )
{
_EdgesOnShape& eos = data._edgesOnShape[iS];
if ( eos._edges.empty() ) continue;
if ( eos._edges[0]->_nodes.size() < 2 )
continue; // on _noShrinkShapes
for ( size_t i = 0; i < eos._edges.size(); ++i )
{
_LayerEdge& edge = *eos._edges[i];
// get accumulated length of segments
vector< double > segLen( edge._pos.size() );
segLen[0] = 0.0;
for ( size_t j = 1; j < edge._pos.size(); ++j )
segLen[j] = segLen[j-1] + (edge._pos[j-1] - edge._pos[j] ).Modulus();
// allocate memory for new nodes if it is not yet refined
const SMDS_MeshNode* tgtNode = edge._nodes.back();
if ( edge._nodes.size() == 2 )
{
edge._nodes.resize( eos._hyp.GetNumberLayers() + 1, 0 );
edge._nodes[1] = 0;
edge._nodes.back() = tgtNode;
}
// get data of a shrink shape
if ( !eos._sWOL.IsNull() && eos._sWOL != prevSWOL )
{
isOnEdge = ( eos.SWOLType() == TopAbs_EDGE );
if ( isOnEdge )
{
geomEdge = TopoDS::Edge( eos._sWOL );
curve = BRep_Tool::Curve( geomEdge, loc, f,l);
}
else
{
geomFace = TopoDS::Face( eos._sWOL );
surface = BRep_Tool::Surface( geomFace, loc );
}
prevSWOL = eos._sWOL;
}
// restore shapePos of the last node by already treated _LayerEdge of another _SolidData
const TGeomID baseShapeId = edge._nodes[0]->getshapeId();
if ( baseShapeId != prevBaseId )
{
map< TGeomID, TNode2Edge* >::iterator s2ne = data._s2neMap.find( baseShapeId );
n2eMap = ( s2ne == data._s2neMap.end() ) ? 0 : n2eMap = s2ne->second;
prevBaseId = baseShapeId;
}
_LayerEdge* edgeOnSameNode = 0;
if ( n2eMap && (( n2e = n2eMap->find( edge._nodes[0] )) != n2eMap->end() ))
{
edgeOnSameNode = n2e->second;
const gp_XYZ& otherTgtPos = edgeOnSameNode->_pos.back();
SMDS_PositionPtr lastPos = tgtNode->GetPosition();
if ( isOnEdge )
{
SMDS_EdgePosition* epos = static_cast<SMDS_EdgePosition*>( lastPos );
epos->SetUParameter( otherTgtPos.X() );
}
else
{
SMDS_FacePosition* fpos = static_cast<SMDS_FacePosition*>( lastPos );
fpos->SetUParameter( otherTgtPos.X() );
fpos->SetVParameter( otherTgtPos.Y() );
}
}
// calculate height of the first layer
double h0;
const double T = segLen.back(); //data._hyp.GetTotalThickness();
const double f = eos._hyp.GetStretchFactor();
const int N = eos._hyp.GetNumberLayers();
const double fPowN = pow( f, N );
if ( fPowN - 1 <= numeric_limits<double>::min() )
h0 = T / N;
else
h0 = T * ( f - 1 )/( fPowN - 1 );
const double zeroLen = std::numeric_limits<double>::min();
// create intermediate nodes
double hSum = 0, hi = h0/f;
size_t iSeg = 1;
for ( size_t iStep = 1; iStep < edge._nodes.size(); ++iStep )
{
// compute an intermediate position
hi *= f;
hSum += hi;
while ( hSum > segLen[iSeg] && iSeg < segLen.size()-1)
++iSeg;
int iPrevSeg = iSeg-1;
while ( fabs( segLen[iPrevSeg] - segLen[iSeg]) <= zeroLen && iPrevSeg > 0 )
--iPrevSeg;
double r = ( segLen[iSeg] - hSum ) / ( segLen[iSeg] - segLen[iPrevSeg] );
gp_Pnt pos = r * edge._pos[iPrevSeg] + (1-r) * edge._pos[iSeg];
SMDS_MeshNode*& node = const_cast< SMDS_MeshNode*& >( edge._nodes[ iStep ]);
if ( !eos._sWOL.IsNull() )
{
// compute XYZ by parameters <pos>
if ( isOnEdge )
{
u = pos.X();
if ( !node )
pos = curve->Value( u ).Transformed(loc);
}
else
{
uv.SetCoord( pos.X(), pos.Y() );
if ( !node )
pos = surface->Value( pos.X(), pos.Y() ).Transformed(loc);
}
}
// create or update the node
if ( !node )
{
node = helper.AddNode( pos.X(), pos.Y(), pos.Z());
if ( !eos._sWOL.IsNull() )
{
if ( isOnEdge )
getMeshDS()->SetNodeOnEdge( node, geomEdge, u );
else
getMeshDS()->SetNodeOnFace( node, geomFace, uv.X(), uv.Y() );
}
else
{
getMeshDS()->SetNodeInVolume( node, helper.GetSubShapeID() );
}
}
else
{
if ( !eos._sWOL.IsNull() )
{
// make average pos from new and current parameters
if ( isOnEdge )
{
u = 0.5 * ( u + helper.GetNodeU( geomEdge, node ));
pos = curve->Value( u ).Transformed(loc);
SMDS_EdgePosition* epos = static_cast<SMDS_EdgePosition*>( node->GetPosition() );
epos->SetUParameter( u );
}
else
{
uv = 0.5 * ( uv + helper.GetNodeUV( geomFace, node ));
pos = surface->Value( uv.X(), uv.Y()).Transformed(loc);
SMDS_FacePosition* fpos = static_cast<SMDS_FacePosition*>( node->GetPosition() );
fpos->SetUParameter( uv.X() );
fpos->SetVParameter( uv.Y() );
}
}
node->setXYZ( pos.X(), pos.Y(), pos.Z() );
}
} // loop on edge._nodes
if ( !eos._sWOL.IsNull() ) // prepare for shrink()
{
if ( isOnEdge )
edge._pos.back().SetCoord( u, 0,0);
else
edge._pos.back().SetCoord( uv.X(), uv.Y() ,0);
if ( edgeOnSameNode )
edgeOnSameNode->_pos.back() = edge._pos.back();
}
} // loop on eos._edges to create nodes
if ( !getMeshDS()->IsEmbeddedMode() )
// Log node movement
for ( size_t i = 0; i < eos._edges.size(); ++i )
{
SMESH_TNodeXYZ p ( eos._edges[i]->_nodes.back() );
getMeshDS()->MoveNode( p._node, p.X(), p.Y(), p.Z() );
}
}
// Create volumes
helper.SetElementsOnShape(true);
vector< vector<const SMDS_MeshNode*>* > nnVec;
set< vector<const SMDS_MeshNode*>* > nnSet;
set< int > degenEdgeInd;
vector<const SMDS_MeshElement*> degenVols;
TopExp_Explorer exp( data._solid, TopAbs_FACE );
for ( ; exp.More(); exp.Next() )
{
const TGeomID faceID = getMeshDS()->ShapeToIndex( exp.Current() );
if ( data._ignoreFaceIds.count( faceID ))
continue;
const bool isReversedFace = data._reversedFaceIds.count( faceID );
SMESHDS_SubMesh* fSubM = getMeshDS()->MeshElements( exp.Current() );
SMDS_ElemIteratorPtr fIt = fSubM->GetElements();
while ( fIt->more() )
{
const SMDS_MeshElement* face = fIt->next();
const int nbNodes = face->NbCornerNodes();
nnVec.resize( nbNodes );
nnSet.clear();
degenEdgeInd.clear();
int nbZ = 0;
SMDS_NodeIteratorPtr nIt = face->nodeIterator();
for ( int iN = 0; iN < nbNodes; ++iN )
{
const SMDS_MeshNode* n = nIt->next();
const int i = isReversedFace ? nbNodes-1-iN : iN;
nnVec[ i ] = & data._n2eMap[ n ]->_nodes;
if ( nnVec[ i ]->size() < 2 )
degenEdgeInd.insert( iN );
else
nbZ = nnVec[ i ]->size();
if ( helper.HasDegeneratedEdges() )
nnSet.insert( nnVec[ i ]);
}
if ( nbZ == 0 )
continue;
if ( 0 < nnSet.size() && nnSet.size() < 3 )
continue;
switch ( nbNodes )
{
case 3:
switch ( degenEdgeInd.size() )
{
case 0: // PENTA
{
for ( int iZ = 1; iZ < nbZ; ++iZ )
helper.AddVolume( (*nnVec[0])[iZ-1], (*nnVec[1])[iZ-1], (*nnVec[2])[iZ-1],
(*nnVec[0])[iZ], (*nnVec[1])[iZ], (*nnVec[2])[iZ]);
break;
}
case 1: // PYRAM
{
int i2 = *degenEdgeInd.begin();
int i0 = helper.WrapIndex( i2 - 1, nbNodes );
int i1 = helper.WrapIndex( i2 + 1, nbNodes );
for ( int iZ = 1; iZ < nbZ; ++iZ )
helper.AddVolume( (*nnVec[i0])[iZ-1], (*nnVec[i1])[iZ-1],
(*nnVec[i1])[iZ], (*nnVec[i0])[iZ], (*nnVec[i2])[0]);
break;
}
case 2: // TETRA
{
int i3 = !degenEdgeInd.count(0) ? 0 : !degenEdgeInd.count(1) ? 1 : 2;
for ( int iZ = 1; iZ < nbZ; ++iZ )
helper.AddVolume( (*nnVec[0])[iZ-1], (*nnVec[1])[iZ-1], (*nnVec[2])[iZ-1],
(*nnVec[i3])[iZ]);
break;
}
}
break;
case 4:
switch ( degenEdgeInd.size() )
{
case 0: // HEX
{
for ( int iZ = 1; iZ < nbZ; ++iZ )
helper.AddVolume( (*nnVec[0])[iZ-1], (*nnVec[1])[iZ-1],
(*nnVec[2])[iZ-1], (*nnVec[3])[iZ-1],
(*nnVec[0])[iZ], (*nnVec[1])[iZ],
(*nnVec[2])[iZ], (*nnVec[3])[iZ]);
break;
}
case 2: // PENTA?
{
int i2 = *degenEdgeInd.begin();
int i3 = *degenEdgeInd.rbegin();
bool ok = ( i3 - i2 == 1 );
if ( i2 == 0 && i3 == 3 ) { i2 = 3; i3 = 0; ok = true; }
int i0 = helper.WrapIndex( i3 + 1, nbNodes );
int i1 = helper.WrapIndex( i0 + 1, nbNodes );
for ( int iZ = 1; iZ < nbZ; ++iZ )
{
const SMDS_MeshElement* vol =
helper.AddVolume( (*nnVec[i3])[0], (*nnVec[i0])[iZ], (*nnVec[i0])[iZ-1],
(*nnVec[i2])[0], (*nnVec[i1])[iZ], (*nnVec[i1])[iZ-1]);
if ( !ok && vol )
degenVols.push_back( vol );
}
break;
}
case 3: // degen HEX
{
const SMDS_MeshNode* nn[8];
for ( int iZ = 1; iZ < nbZ; ++iZ )
{
const SMDS_MeshElement* vol =
helper.AddVolume( nnVec[0]->size() > 1 ? (*nnVec[0])[iZ-1] : (*nnVec[0])[0],
nnVec[1]->size() > 1 ? (*nnVec[1])[iZ-1] : (*nnVec[1])[0],
nnVec[2]->size() > 1 ? (*nnVec[2])[iZ-1] : (*nnVec[2])[0],
nnVec[3]->size() > 1 ? (*nnVec[3])[iZ-1] : (*nnVec[3])[0],
nnVec[0]->size() > 1 ? (*nnVec[0])[iZ] : (*nnVec[0])[0],
nnVec[1]->size() > 1 ? (*nnVec[1])[iZ] : (*nnVec[1])[0],
nnVec[2]->size() > 1 ? (*nnVec[2])[iZ] : (*nnVec[2])[0],
nnVec[3]->size() > 1 ? (*nnVec[3])[iZ] : (*nnVec[3])[0]);
degenVols.push_back( vol );
}
}
break;
}
break;
default:
return error("Not supported type of element", data._index);
} // switch ( nbNodes )
} // while ( fIt->more() )
} // loop on FACEs
if ( !degenVols.empty() )
{
SMESH_ComputeErrorPtr& err = _mesh->GetSubMesh( data._solid )->GetComputeError();
if ( !err || err->IsOK() )
{
err.reset( new SMESH_ComputeError( COMPERR_WARNING,
"Degenerated volumes created" ));
err->myBadElements.insert( err->myBadElements.end(),
degenVols.begin(),degenVols.end() );
}
}
return true;
}
//================================================================================
/*!
* \brief Shrink 2D mesh on faces to let space for inflated layers
*/
//================================================================================
bool _ViscousBuilder::shrink()
{
// make map of (ids of FACEs to shrink mesh on) to (_SolidData containing _LayerEdge's
// inflated along FACE or EDGE)
map< TGeomID, _SolidData* > f2sdMap;
for ( size_t i = 0 ; i < _sdVec.size(); ++i )
{
_SolidData& data = _sdVec[i];
TopTools_MapOfShape FFMap;
map< TGeomID, TopoDS_Shape >::iterator s2s = data._shrinkShape2Shape.begin();
for (; s2s != data._shrinkShape2Shape.end(); ++s2s )
if ( s2s->second.ShapeType() == TopAbs_FACE )
{
f2sdMap.insert( make_pair( getMeshDS()->ShapeToIndex( s2s->second ), &data ));
if ( FFMap.Add( (*s2s).second ))
// Put mesh faces on the shrinked FACE to the proxy sub-mesh to avoid
// usage of mesh faces made in addBoundaryElements() by the 3D algo or
// by StdMeshers_QuadToTriaAdaptor
if ( SMESHDS_SubMesh* smDS = getMeshDS()->MeshElements( s2s->second ))
{
SMESH_ProxyMesh::SubMesh* proxySub =
data._proxyMesh->getFaceSubM( TopoDS::Face( s2s->second ), /*create=*/true);
SMDS_ElemIteratorPtr fIt = smDS->GetElements();
while ( fIt->more() )
proxySub->AddElement( fIt->next() );
// as a result 3D algo will use elements from proxySub and not from smDS
}
}
}
SMESH_MesherHelper helper( *_mesh );
helper.ToFixNodeParameters( true );
// EDGE's to shrink
map< TGeomID, _Shrinker1D > e2shrMap;
vector< _EdgesOnShape* > subEOS;
vector< _LayerEdge* > lEdges;
// loop on FACES to srink mesh on
map< TGeomID, _SolidData* >::iterator f2sd = f2sdMap.begin();
for ( ; f2sd != f2sdMap.end(); ++f2sd )
{
_SolidData& data = *f2sd->second;
const TopoDS_Face& F = TopoDS::Face( getMeshDS()->IndexToShape( f2sd->first ));
SMESH_subMesh* sm = _mesh->GetSubMesh( F );
SMESHDS_SubMesh* smDS = sm->GetSubMeshDS();
Handle(Geom_Surface) surface = BRep_Tool::Surface(F);
helper.SetSubShape(F);
// ===========================
// Prepare data for shrinking
// ===========================
// Collect nodes to smooth, as src nodes are not yet replaced by tgt ones
// and thus all nodes on a FACE connected to 2d elements are to be smoothed
vector < const SMDS_MeshNode* > smoothNodes;
{
SMDS_NodeIteratorPtr nIt = smDS->GetNodes();
while ( nIt->more() )
{
const SMDS_MeshNode* n = nIt->next();
if ( n->NbInverseElements( SMDSAbs_Face ) > 0 )
smoothNodes.push_back( n );
}
}
// Find out face orientation
double refSign = 1;
const set<TGeomID> ignoreShapes;
bool isOkUV;
if ( !smoothNodes.empty() )
{
vector<_Simplex> simplices;
_Simplex::GetSimplices( smoothNodes[0], simplices, ignoreShapes );
helper.GetNodeUV( F, simplices[0]._nPrev, 0, &isOkUV ); // fix UV of silpmex nodes
helper.GetNodeUV( F, simplices[0]._nNext, 0, &isOkUV );
gp_XY uv = helper.GetNodeUV( F, smoothNodes[0], 0, &isOkUV );
if ( !simplices[0].IsForward(uv, smoothNodes[0], F, helper,refSign) )
refSign = -1;
}
// Find _LayerEdge's inflated along F
subEOS.clear();
lEdges.clear();
{
SMESH_subMeshIteratorPtr subIt = sm->getDependsOnIterator(/*includeSelf=*/false,
/*complexFirst=*/true); //!!!
while ( subIt->more() )
{
const TGeomID subID = subIt->next()->GetId();
if ( data._noShrinkShapes.count( subID ))
continue;
_EdgesOnShape* eos = data.GetShapeEdges( subID );
if ( !eos || eos->_sWOL.IsNull() ) continue;
subEOS.push_back( eos );
for ( size_t i = 0; i < eos->_edges.size(); ++i )
{
lEdges.push_back( eos->_edges[ i ] );
prepareEdgeToShrink( *eos->_edges[ i ], *eos, helper, smDS );
}
}
}
dumpFunction(SMESH_Comment("beforeShrinkFace")<<f2sd->first); // debug
SMDS_ElemIteratorPtr fIt = smDS->GetElements();
while ( fIt->more() )
if ( const SMDS_MeshElement* f = fIt->next() )
dumpChangeNodes( f );
dumpFunctionEnd();
// Replace source nodes by target nodes in mesh faces to shrink
dumpFunction(SMESH_Comment("replNodesOnFace")<<f2sd->first); // debug
const SMDS_MeshNode* nodes[20];
for ( size_t iS = 0; iS < subEOS.size(); ++iS )
{
_EdgesOnShape& eos = * subEOS[ iS ];
for ( size_t i = 0; i < eos._edges.size(); ++i )
{
_LayerEdge& edge = *eos._edges[i];
const SMDS_MeshNode* srcNode = edge._nodes[0];
const SMDS_MeshNode* tgtNode = edge._nodes.back();
SMDS_ElemIteratorPtr fIt = srcNode->GetInverseElementIterator(SMDSAbs_Face);
while ( fIt->more() )
{
const SMDS_MeshElement* f = fIt->next();
if ( !smDS->Contains( f ))
continue;
SMDS_NodeIteratorPtr nIt = f->nodeIterator();
for ( int iN = 0; nIt->more(); ++iN )
{
const SMDS_MeshNode* n = nIt->next();
nodes[iN] = ( n == srcNode ? tgtNode : n );
}
helper.GetMeshDS()->ChangeElementNodes( f, nodes, f->NbNodes() );
dumpChangeNodes( f );
}
}
}
dumpFunctionEnd();
// find out if a FACE is concave
const bool isConcaveFace = isConcave( F, helper );
// Create _SmoothNode's on face F
vector< _SmoothNode > nodesToSmooth( smoothNodes.size() );
{
dumpFunction(SMESH_Comment("fixUVOnFace")<<f2sd->first); // debug
const bool sortSimplices = isConcaveFace;
for ( size_t i = 0; i < smoothNodes.size(); ++i )
{
const SMDS_MeshNode* n = smoothNodes[i];
nodesToSmooth[ i ]._node = n;
// src nodes must be replaced by tgt nodes to have tgt nodes in _simplices
_Simplex::GetSimplices( n, nodesToSmooth[ i ]._simplices, ignoreShapes, 0, sortSimplices);
// fix up incorrect uv of nodes on the FACE
helper.GetNodeUV( F, n, 0, &isOkUV);
dumpMove( n );
}
dumpFunctionEnd();
}
//if ( nodesToSmooth.empty() ) continue;
// Find EDGE's to shrink and set simpices to LayerEdge's
set< _Shrinker1D* > eShri1D;
{
for ( size_t iS = 0; iS < subEOS.size(); ++iS )
{
_EdgesOnShape& eos = * subEOS[ iS ];
if ( eos.SWOLType() == TopAbs_EDGE )
{
SMESH_subMesh* edgeSM = _mesh->GetSubMesh( eos._sWOL );
_Shrinker1D& srinker = e2shrMap[ edgeSM->GetId() ];
eShri1D.insert( & srinker );
srinker.AddEdge( eos._edges[0], eos, helper );
VISCOUS_3D::ToClearSubWithMain( edgeSM, data._solid );
// restore params of nodes on EGDE if the EDGE has been already
// srinked while srinking other FACE
srinker.RestoreParams();
}
for ( size_t i = 0; i < eos._edges.size(); ++i )
{
_LayerEdge& edge = * eos._edges[i];
_Simplex::GetSimplices( /*tgtNode=*/edge._nodes.back(), edge._simplices, ignoreShapes );
}
}
}
bool toFixTria = false; // to improve quality of trias by diagonal swap
if ( isConcaveFace )
{
const bool hasTria = _mesh->NbTriangles(), hasQuad = _mesh->NbQuadrangles();
if ( hasTria != hasQuad ) {
toFixTria = hasTria;
}
else {
set<int> nbNodesSet;
SMDS_ElemIteratorPtr fIt = smDS->GetElements();
while ( fIt->more() && nbNodesSet.size() < 2 )
nbNodesSet.insert( fIt->next()->NbCornerNodes() );
toFixTria = ( *nbNodesSet.begin() == 3 );
}
}
// ==================
// Perform shrinking
// ==================
bool shrinked = true;
int badNb, shriStep=0, smooStep=0;
_SmoothNode::SmoothType smoothType
= isConcaveFace ? _SmoothNode::ANGULAR : _SmoothNode::LAPLACIAN;
while ( shrinked )
{
shriStep++;
// Move boundary nodes (actually just set new UV)
// -----------------------------------------------
dumpFunction(SMESH_Comment("moveBoundaryOnF")<<f2sd->first<<"_st"<<shriStep ); // debug
shrinked = false;
for ( size_t iS = 0; iS < subEOS.size(); ++iS )
{
_EdgesOnShape& eos = * subEOS[ iS ];
for ( size_t i = 0; i < eos._edges.size(); ++i )
{
shrinked |= eos._edges[i]->SetNewLength2d( surface, F, eos, helper );
}
}
dumpFunctionEnd();
// Move nodes on EDGE's
// (XYZ is set as soon as a needed length reached in SetNewLength2d())
set< _Shrinker1D* >::iterator shr = eShri1D.begin();
for ( ; shr != eShri1D.end(); ++shr )
(*shr)->Compute( /*set3D=*/false, helper );
// Smoothing in 2D
// -----------------
int nbNoImpSteps = 0;
bool moved = true;
badNb = 1;
while (( nbNoImpSteps < 5 && badNb > 0) && moved)
{
dumpFunction(SMESH_Comment("shrinkFace")<<f2sd->first<<"_st"<<++smooStep); // debug
int oldBadNb = badNb;
badNb = 0;
moved = false;
// '% 5' minimizes NB FUNCTIONS on viscous_layers_00/B2 case
_SmoothNode::SmoothType smooTy = ( smooStep % 5 ) ? smoothType : _SmoothNode::LAPLACIAN;
for ( size_t i = 0; i < nodesToSmooth.size(); ++i )
{
moved |= nodesToSmooth[i].Smooth( badNb, surface, helper, refSign,
smooTy, /*set3D=*/isConcaveFace);
}
if ( badNb < oldBadNb )
nbNoImpSteps = 0;
else
nbNoImpSteps++;
dumpFunctionEnd();
}
if ( badNb > 0 )
return error(SMESH_Comment("Can't shrink 2D mesh on face ") << f2sd->first );
if ( shriStep > 200 )
return error(SMESH_Comment("Infinite loop at shrinking 2D mesh on face ") << f2sd->first );
// Fix narrow triangles by swapping diagonals
// ---------------------------------------
if ( toFixTria )
{
set<const SMDS_MeshNode*> usedNodes;
fixBadFaces( F, helper, /*is2D=*/true, shriStep, & usedNodes); // swap diagonals
// update working data
set<const SMDS_MeshNode*>::iterator n;
for ( size_t i = 0; i < nodesToSmooth.size() && !usedNodes.empty(); ++i )
{
n = usedNodes.find( nodesToSmooth[ i ]._node );
if ( n != usedNodes.end())
{
_Simplex::GetSimplices( nodesToSmooth[ i ]._node,
nodesToSmooth[ i ]._simplices,
ignoreShapes, NULL,
/*sortSimplices=*/ smoothType == _SmoothNode::ANGULAR );
usedNodes.erase( n );
}
}
for ( size_t i = 0; i < lEdges.size() && !usedNodes.empty(); ++i )
{
n = usedNodes.find( /*tgtNode=*/ lEdges[i]->_nodes.back() );
if ( n != usedNodes.end())
{
_Simplex::GetSimplices( lEdges[i]->_nodes.back(),
lEdges[i]->_simplices,
ignoreShapes );
usedNodes.erase( n );
}
}
}
// TODO: check effect of this additional smooth
// additional laplacian smooth to increase allowed shrink step
// for ( int st = 1; st; --st )
// {
// dumpFunction(SMESH_Comment("shrinkFace")<<f2sd->first<<"_st"<<++smooStep); // debug
// for ( size_t i = 0; i < nodesToSmooth.size(); ++i )
// {
// nodesToSmooth[i].Smooth( badNb,surface,helper,refSign,
// _SmoothNode::LAPLACIAN,/*set3D=*/false);
// }
// }
} // while ( shrinked )
// No wrongly shaped faces remain; final smooth. Set node XYZ.
bool isStructuredFixed = false;
if ( SMESH_2D_Algo* algo = dynamic_cast<SMESH_2D_Algo*>( sm->GetAlgo() ))
isStructuredFixed = algo->FixInternalNodes( *data._proxyMesh, F );
if ( !isStructuredFixed )
{
if ( isConcaveFace ) // fix narrow faces by swapping diagonals
fixBadFaces( F, helper, /*is2D=*/false, ++shriStep );
for ( int st = 3; st; --st )
{
switch( st ) {
case 1: smoothType = _SmoothNode::LAPLACIAN; break;
case 2: smoothType = _SmoothNode::LAPLACIAN; break;
case 3: smoothType = _SmoothNode::ANGULAR; break;
}
dumpFunction(SMESH_Comment("shrinkFace")<<f2sd->first<<"_st"<<++smooStep); // debug
for ( size_t i = 0; i < nodesToSmooth.size(); ++i )
{
nodesToSmooth[i].Smooth( badNb,surface,helper,refSign,
smoothType,/*set3D=*/st==1 );
}
dumpFunctionEnd();
}
}
// Set an event listener to clear FACE sub-mesh together with SOLID sub-mesh
VISCOUS_3D::ToClearSubWithMain( sm, data._solid );
if ( !getMeshDS()->IsEmbeddedMode() )
// Log node movement
for ( size_t i = 0; i < nodesToSmooth.size(); ++i )
{
SMESH_TNodeXYZ p ( nodesToSmooth[i]._node );
getMeshDS()->MoveNode( nodesToSmooth[i]._node, p.X(), p.Y(), p.Z() );
}
} // loop on FACES to srink mesh on
// Replace source nodes by target nodes in shrinked mesh edges
map< int, _Shrinker1D >::iterator e2shr = e2shrMap.begin();
for ( ; e2shr != e2shrMap.end(); ++e2shr )
e2shr->second.SwapSrcTgtNodes( getMeshDS() );
return true;
}
//================================================================================
/*!
* \brief Computes 2d shrink direction and finds nodes limiting shrinking
*/
//================================================================================
bool _ViscousBuilder::prepareEdgeToShrink( _LayerEdge& edge,
_EdgesOnShape& eos,
SMESH_MesherHelper& helper,
const SMESHDS_SubMesh* faceSubMesh)
{
const SMDS_MeshNode* srcNode = edge._nodes[0];
const SMDS_MeshNode* tgtNode = edge._nodes.back();
if ( eos.SWOLType() == TopAbs_FACE )
{
gp_XY srcUV ( edge._pos[0].X(), edge._pos[0].Y() ); //helper.GetNodeUV( F, srcNode );
gp_XY tgtUV = edge.LastUV( TopoDS::Face( eos._sWOL ), eos ); //helper.GetNodeUV( F, tgtNode );
gp_Vec2d uvDir( srcUV, tgtUV );
double uvLen = uvDir.Magnitude();
uvDir /= uvLen;
edge._normal.SetCoord( uvDir.X(),uvDir.Y(), 0 );
edge._len = uvLen;
edge._pos.resize(1);
edge._pos[0].SetCoord( tgtUV.X(), tgtUV.Y(), 0 );
// set UV of source node to target node
SMDS_FacePosition* pos = static_cast<SMDS_FacePosition*>( tgtNode->GetPosition() );
pos->SetUParameter( srcUV.X() );
pos->SetVParameter( srcUV.Y() );
}
else // _sWOL is TopAbs_EDGE
{
const TopoDS_Edge& E = TopoDS::Edge( eos._sWOL );
SMESHDS_SubMesh* edgeSM = getMeshDS()->MeshElements( E );
if ( !edgeSM || edgeSM->NbElements() == 0 )
return error(SMESH_Comment("Not meshed EDGE ") << getMeshDS()->ShapeToIndex( E ));
const SMDS_MeshNode* n2 = 0;
SMDS_ElemIteratorPtr eIt = srcNode->GetInverseElementIterator(SMDSAbs_Edge);
while ( eIt->more() && !n2 )
{
const SMDS_MeshElement* e = eIt->next();
if ( !edgeSM->Contains(e)) continue;
n2 = e->GetNode( 0 );
if ( n2 == srcNode ) n2 = e->GetNode( 1 );
}
if ( !n2 )
return error(SMESH_Comment("Wrongly meshed EDGE ") << getMeshDS()->ShapeToIndex( E ));
double uSrc = helper.GetNodeU( E, srcNode, n2 );
double uTgt = helper.GetNodeU( E, tgtNode, srcNode );
double u2 = helper.GetNodeU( E, n2, srcNode );
edge._pos.clear();
if ( fabs( uSrc-uTgt ) < 0.99 * fabs( uSrc-u2 ))
{
// tgtNode is located so that it does not make faces with wrong orientation
return true;
}
edge._pos.resize(1);
edge._pos[0].SetCoord( U_TGT, uTgt );
edge._pos[0].SetCoord( U_SRC, uSrc );
edge._pos[0].SetCoord( LEN_TGT, fabs( uSrc-uTgt ));
edge._simplices.resize( 1 );
edge._simplices[0]._nPrev = n2;
// set U of source node to the target node
SMDS_EdgePosition* pos = static_cast<SMDS_EdgePosition*>( tgtNode->GetPosition() );
pos->SetUParameter( uSrc );
}
return true;
}
//================================================================================
/*!
* \brief Restore position of a sole node of a _LayerEdge based on _noShrinkShapes
*/
//================================================================================
void _ViscousBuilder::restoreNoShrink( _LayerEdge& edge ) const
{
if ( edge._nodes.size() == 1 )
{
edge._pos.clear();
edge._len = 0;
const SMDS_MeshNode* srcNode = edge._nodes[0];
TopoDS_Shape S = SMESH_MesherHelper::GetSubShapeByNode( srcNode, getMeshDS() );
if ( S.IsNull() ) return;
gp_Pnt p;
switch ( S.ShapeType() )
{
case TopAbs_EDGE:
{
double f,l;
TopLoc_Location loc;
Handle(Geom_Curve) curve = BRep_Tool::Curve( TopoDS::Edge( S ), loc, f, l );
if ( curve.IsNull() ) return;
SMDS_EdgePosition* ePos = static_cast<SMDS_EdgePosition*>( srcNode->GetPosition() );
p = curve->Value( ePos->GetUParameter() );
break;
}
case TopAbs_VERTEX:
{
p = BRep_Tool::Pnt( TopoDS::Vertex( S ));
break;
}
default: return;
}
getMeshDS()->MoveNode( srcNode, p.X(), p.Y(), p.Z() );
dumpMove( srcNode );
}
}
//================================================================================
/*!
* \brief Try to fix triangles with high aspect ratio by swaping diagonals
*/
//================================================================================
void _ViscousBuilder::fixBadFaces(const TopoDS_Face& F,
SMESH_MesherHelper& helper,
const bool is2D,
const int step,
set<const SMDS_MeshNode*> * involvedNodes)
{
SMESH::Controls::AspectRatio qualifier;
SMESH::Controls::TSequenceOfXYZ points(3), points1(3), points2(3);
const double maxAspectRatio = is2D ? 4. : 2;
_NodeCoordHelper xyz( F, helper, is2D );
// find bad triangles
vector< const SMDS_MeshElement* > badTrias;
vector< double > badAspects;
SMESHDS_SubMesh* sm = helper.GetMeshDS()->MeshElements( F );
SMDS_ElemIteratorPtr fIt = sm->GetElements();
while ( fIt->more() )
{
const SMDS_MeshElement * f = fIt->next();
if ( f->NbCornerNodes() != 3 ) continue;
for ( int iP = 0; iP < 3; ++iP ) points(iP+1) = xyz( f->GetNode(iP));
double aspect = qualifier.GetValue( points );
if ( aspect > maxAspectRatio )
{
badTrias.push_back( f );
badAspects.push_back( aspect );
}
}
if ( step == 1 )
{
dumpFunction(SMESH_Comment("beforeSwapDiagonals_F")<<helper.GetSubShapeID());
SMDS_ElemIteratorPtr fIt = sm->GetElements();
while ( fIt->more() )
{
const SMDS_MeshElement * f = fIt->next();
if ( f->NbCornerNodes() == 3 )
dumpChangeNodes( f );
}
dumpFunctionEnd();
}
if ( badTrias.empty() )
return;
// find couples of faces to swap diagonal
typedef pair < const SMDS_MeshElement* , const SMDS_MeshElement* > T2Trias;
vector< T2Trias > triaCouples;
TIDSortedElemSet involvedFaces, emptySet;
for ( size_t iTia = 0; iTia < badTrias.size(); ++iTia )
{
T2Trias trias [3];
double aspRatio [3];
int i1, i2, i3;
if ( !involvedFaces.insert( badTrias[iTia] ).second )
continue;
for ( int iP = 0; iP < 3; ++iP )
points(iP+1) = xyz( badTrias[iTia]->GetNode(iP));
// find triangles adjacent to badTrias[iTia] with better aspect ratio after diag-swaping
int bestCouple = -1;
for ( int iSide = 0; iSide < 3; ++iSide )
{
const SMDS_MeshNode* n1 = badTrias[iTia]->GetNode( iSide );
const SMDS_MeshNode* n2 = badTrias[iTia]->GetNode(( iSide+1 ) % 3 );
trias [iSide].first = badTrias[iTia];
trias [iSide].second = SMESH_MeshAlgos::FindFaceInSet( n1, n2, emptySet, involvedFaces,
& i1, & i2 );
if (( ! trias[iSide].second ) ||
( trias[iSide].second->NbCornerNodes() != 3 ) ||
( ! sm->Contains( trias[iSide].second )))
continue;
// aspect ratio of an adjacent tria
for ( int iP = 0; iP < 3; ++iP )
points2(iP+1) = xyz( trias[iSide].second->GetNode(iP));
double aspectInit = qualifier.GetValue( points2 );
// arrange nodes as after diag-swaping
if ( helper.WrapIndex( i1+1, 3 ) == i2 )
i3 = helper.WrapIndex( i1-1, 3 );
else
i3 = helper.WrapIndex( i1+1, 3 );
points1 = points;
points1( 1+ iSide ) = points2( 1+ i3 );
points2( 1+ i2 ) = points1( 1+ ( iSide+2 ) % 3 );
// aspect ratio after diag-swaping
aspRatio[ iSide ] = qualifier.GetValue( points1 ) + qualifier.GetValue( points2 );
if ( aspRatio[ iSide ] > aspectInit + badAspects[ iTia ] )
continue;
// prevent inversion of a triangle
gp_Vec norm1 = gp_Vec( points1(1), points1(3) ) ^ gp_Vec( points1(1), points1(2) );
gp_Vec norm2 = gp_Vec( points2(1), points2(3) ) ^ gp_Vec( points2(1), points2(2) );
if ( norm1 * norm2 < 0. && norm1.Angle( norm2 ) > 70./180.*M_PI )
continue;
if ( bestCouple < 0 || aspRatio[ bestCouple ] > aspRatio[ iSide ] )
bestCouple = iSide;
}
if ( bestCouple >= 0 )
{
triaCouples.push_back( trias[bestCouple] );
involvedFaces.insert ( trias[bestCouple].second );
}
else
{
involvedFaces.erase( badTrias[iTia] );
}
}
if ( triaCouples.empty() )
return;
// swap diagonals
SMESH_MeshEditor editor( helper.GetMesh() );
dumpFunction(SMESH_Comment("beforeSwapDiagonals_F")<<helper.GetSubShapeID()<<"_"<<step);
for ( size_t i = 0; i < triaCouples.size(); ++i )
{
dumpChangeNodes( triaCouples[i].first );
dumpChangeNodes( triaCouples[i].second );
editor.InverseDiag( triaCouples[i].first, triaCouples[i].second );
}
if ( involvedNodes )
for ( size_t i = 0; i < triaCouples.size(); ++i )
{
involvedNodes->insert( triaCouples[i].first->begin_nodes(),
triaCouples[i].first->end_nodes() );
involvedNodes->insert( triaCouples[i].second->begin_nodes(),
triaCouples[i].second->end_nodes() );
}
// just for debug dump resulting triangles
dumpFunction(SMESH_Comment("swapDiagonals_F")<<helper.GetSubShapeID()<<"_"<<step);
for ( size_t i = 0; i < triaCouples.size(); ++i )
{
dumpChangeNodes( triaCouples[i].first );
dumpChangeNodes( triaCouples[i].second );
}
}
//================================================================================
/*!
* \brief Move target node to it's final position on the FACE during shrinking
*/
//================================================================================
bool _LayerEdge::SetNewLength2d( Handle(Geom_Surface)& surface,
const TopoDS_Face& F,
_EdgesOnShape& eos,
SMESH_MesherHelper& helper )
{
if ( _pos.empty() )
return false; // already at the target position
SMDS_MeshNode* tgtNode = const_cast< SMDS_MeshNode*& >( _nodes.back() );
if ( eos.SWOLType() == TopAbs_FACE )
{
gp_XY curUV = helper.GetNodeUV( F, tgtNode );
gp_Pnt2d tgtUV( _pos[0].X(), _pos[0].Y() );
gp_Vec2d uvDir( _normal.X(), _normal.Y() );
const double uvLen = tgtUV.Distance( curUV );
const double kSafe = Max( 0.5, 1. - 0.1 * _simplices.size() );
// Select shrinking step such that not to make faces with wrong orientation.
double stepSize = 1e100;
for ( size_t i = 0; i < _simplices.size(); ++i )
{
// find intersection of 2 lines: curUV-tgtUV and that connecting simplex nodes
gp_XY uvN1 = helper.GetNodeUV( F, _simplices[i]._nPrev );
gp_XY uvN2 = helper.GetNodeUV( F, _simplices[i]._nNext );
gp_XY dirN = uvN2 - uvN1;
double det = uvDir.Crossed( dirN );
if ( Abs( det ) < std::numeric_limits<double>::min() ) continue;
gp_XY dirN2Cur = curUV - uvN1;
double step = dirN.Crossed( dirN2Cur ) / det;
if ( step > 0 )
stepSize = Min( step, stepSize );
}
gp_Pnt2d newUV;
if ( uvLen <= stepSize )
{
newUV = tgtUV;
_pos.clear();
}
else if ( stepSize > 0 )
{
newUV = curUV + uvDir.XY() * stepSize * kSafe;
}
else
{
return true;
}
SMDS_FacePosition* pos = static_cast<SMDS_FacePosition*>( tgtNode->GetPosition() );
pos->SetUParameter( newUV.X() );
pos->SetVParameter( newUV.Y() );
#ifdef __myDEBUG
gp_Pnt p = surface->Value( newUV.X(), newUV.Y() );
tgtNode->setXYZ( p.X(), p.Y(), p.Z() );
dumpMove( tgtNode );
#endif
}
else // _sWOL is TopAbs_EDGE
{
const TopoDS_Edge& E = TopoDS::Edge( eos._sWOL );
const SMDS_MeshNode* n2 = _simplices[0]._nPrev;
SMDS_EdgePosition* tgtPos = static_cast<SMDS_EdgePosition*>( tgtNode->GetPosition() );
const double u2 = helper.GetNodeU( E, n2, tgtNode );
const double uSrc = _pos[0].Coord( U_SRC );
const double lenTgt = _pos[0].Coord( LEN_TGT );
double newU = _pos[0].Coord( U_TGT );
if ( lenTgt < 0.99 * fabs( uSrc-u2 )) // n2 got out of src-tgt range
{
_pos.clear();
}
else
{
newU = 0.1 * tgtPos->GetUParameter() + 0.9 * u2;
}
tgtPos->SetUParameter( newU );
#ifdef __myDEBUG
gp_XY newUV = helper.GetNodeUV( F, tgtNode, _nodes[0]);
gp_Pnt p = surface->Value( newUV.X(), newUV.Y() );
tgtNode->setXYZ( p.X(), p.Y(), p.Z() );
dumpMove( tgtNode );
#endif
}
return true;
}
//================================================================================
/*!
* \brief Perform smooth on the FACE
* \retval bool - true if the node has been moved
*/
//================================================================================
bool _SmoothNode::Smooth(int& badNb,
Handle(Geom_Surface)& surface,
SMESH_MesherHelper& helper,
const double refSign,
SmoothType how,
bool set3D)
{
const TopoDS_Face& face = TopoDS::Face( helper.GetSubShape() );
// get uv of surrounding nodes
vector<gp_XY> uv( _simplices.size() );
for ( size_t i = 0; i < _simplices.size(); ++i )
uv[i] = helper.GetNodeUV( face, _simplices[i]._nPrev, _node );
// compute new UV for the node
gp_XY newPos (0,0);
if ( how == TFI && _simplices.size() == 4 )
{
gp_XY corners[4];
for ( size_t i = 0; i < _simplices.size(); ++i )
if ( _simplices[i]._nOpp )
corners[i] = helper.GetNodeUV( face, _simplices[i]._nOpp, _node );
else
throw SALOME_Exception(LOCALIZED("TFI smoothing: _Simplex::_nOpp not set!"));
newPos = helper.calcTFI ( 0.5, 0.5,
corners[0], corners[1], corners[2], corners[3],
uv[1], uv[2], uv[3], uv[0] );
}
else if ( how == ANGULAR )
{
newPos = computeAngularPos( uv, helper.GetNodeUV( face, _node ), refSign );
}
else if ( how == CENTROIDAL && _simplices.size() > 3 )
{
// average centers of diagonals wieghted with their reciprocal lengths
if ( _simplices.size() == 4 )
{
double w1 = 1. / ( uv[2]-uv[0] ).SquareModulus();
double w2 = 1. / ( uv[3]-uv[1] ).SquareModulus();
newPos = ( w1 * ( uv[2]+uv[0] ) + w2 * ( uv[3]+uv[1] )) / ( w1+w2 ) / 2;
}
else
{
double sumWeight = 0;
int nb = _simplices.size() == 4 ? 2 : _simplices.size();
for ( int i = 0; i < nb; ++i )
{
int iFrom = i + 2;
int iTo = i + _simplices.size() - 1;
for ( int j = iFrom; j < iTo; ++j )
{
int i2 = SMESH_MesherHelper::WrapIndex( j, _simplices.size() );
double w = 1. / ( uv[i]-uv[i2] ).SquareModulus();
sumWeight += w;
newPos += w * ( uv[i]+uv[i2] );
}
}
newPos /= 2 * sumWeight; // 2 is to get a middle between uv's
}
}
else
{
// Laplacian smooth
for ( size_t i = 0; i < _simplices.size(); ++i )
newPos += uv[i];
newPos /= _simplices.size();
}
// count quality metrics (orientation) of triangles around the node
int nbOkBefore = 0;
gp_XY tgtUV = helper.GetNodeUV( face, _node );
for ( size_t i = 0; i < _simplices.size(); ++i )
nbOkBefore += _simplices[i].IsForward( tgtUV, _node, face, helper, refSign );
int nbOkAfter = 0;
for ( size_t i = 0; i < _simplices.size(); ++i )
nbOkAfter += _simplices[i].IsForward( newPos, _node, face, helper, refSign );
if ( nbOkAfter < nbOkBefore )
{
badNb += _simplices.size() - nbOkBefore;
return false;
}
SMDS_FacePosition* pos = static_cast<SMDS_FacePosition*>( _node->GetPosition() );
pos->SetUParameter( newPos.X() );
pos->SetVParameter( newPos.Y() );
#ifdef __myDEBUG
set3D = true;
#endif
if ( set3D )
{
gp_Pnt p = surface->Value( newPos.X(), newPos.Y() );
const_cast< SMDS_MeshNode* >( _node )->setXYZ( p.X(), p.Y(), p.Z() );
dumpMove( _node );
}
badNb += _simplices.size() - nbOkAfter;
return ( (tgtUV-newPos).SquareModulus() > 1e-10 );
}
//================================================================================
/*!
* \brief Computes new UV using angle based smoothing technic
*/
//================================================================================
gp_XY _SmoothNode::computeAngularPos(vector<gp_XY>& uv,
const gp_XY& uvToFix,
const double refSign)
{
uv.push_back( uv.front() );
vector< gp_XY > edgeDir ( uv.size() );
vector< double > edgeSize( uv.size() );
for ( size_t i = 1; i < edgeDir.size(); ++i )
{
edgeDir [i-1] = uv[i] - uv[i-1];
edgeSize[i-1] = edgeDir[i-1].Modulus();
if ( edgeSize[i-1] < numeric_limits<double>::min() )
edgeDir[i-1].SetX( 100 );
else
edgeDir[i-1] /= edgeSize[i-1] * refSign;
}
edgeDir.back() = edgeDir.front();
edgeSize.back() = edgeSize.front();
gp_XY newPos(0,0);
//int nbEdges = 0;
double sumSize = 0;
for ( size_t i = 1; i < edgeDir.size(); ++i )
{
if ( edgeDir[i-1].X() > 1. ) continue;
int i1 = i-1;
while ( edgeDir[i].X() > 1. && ++i < edgeDir.size() );
if ( i == edgeDir.size() ) break;
gp_XY p = uv[i];
gp_XY norm1( -edgeDir[i1].Y(), edgeDir[i1].X() );
gp_XY norm2( -edgeDir[i].Y(), edgeDir[i].X() );
gp_XY bisec = norm1 + norm2;
double bisecSize = bisec.Modulus();
if ( bisecSize < numeric_limits<double>::min() )
{
bisec = -edgeDir[i1] + edgeDir[i];
bisecSize = bisec.Modulus();
}
bisec /= bisecSize;
gp_XY dirToN = uvToFix - p;
double distToN = dirToN.Modulus();
if ( bisec * dirToN < 0 )
distToN = -distToN;
newPos += ( p + bisec * distToN ) * ( edgeSize[i1] + edgeSize[i] );
//++nbEdges;
sumSize += edgeSize[i1] + edgeSize[i];
}
newPos /= /*nbEdges * */sumSize;
return newPos;
}
//================================================================================
/*!
* \brief Delete _SolidData
*/
//================================================================================
_SolidData::~_SolidData()
{
TNode2Edge::iterator n2e = _n2eMap.begin();
for ( ; n2e != _n2eMap.end(); ++n2e )
{
_LayerEdge* & e = n2e->second;
if ( e && e->_2neibors )
delete e->_2neibors;
delete e;
e = NULL;
}
_n2eMap.clear();
}
//================================================================================
/*!
* \brief Keep a _LayerEdge inflated along the EDGE
*/
//================================================================================
void _Shrinker1D::AddEdge( const _LayerEdge* e,
_EdgesOnShape& eos,
SMESH_MesherHelper& helper )
{
// init
if ( _nodes.empty() )
{
_edges[0] = _edges[1] = 0;
_done = false;
}
// check _LayerEdge
if ( e == _edges[0] || e == _edges[1] )
return;
if ( eos.SWOLType() != TopAbs_EDGE )
throw SALOME_Exception(LOCALIZED("Wrong _LayerEdge is added"));
if ( _edges[0] && !_geomEdge.IsSame( eos._sWOL ))
throw SALOME_Exception(LOCALIZED("Wrong _LayerEdge is added"));
// store _LayerEdge
_geomEdge = TopoDS::Edge( eos._sWOL );
double f,l;
BRep_Tool::Range( _geomEdge, f,l );
double u = helper.GetNodeU( _geomEdge, e->_nodes[0], e->_nodes.back());
_edges[ u < 0.5*(f+l) ? 0 : 1 ] = e;
// Update _nodes
const SMDS_MeshNode* tgtNode0 = _edges[0] ? _edges[0]->_nodes.back() : 0;
const SMDS_MeshNode* tgtNode1 = _edges[1] ? _edges[1]->_nodes.back() : 0;
if ( _nodes.empty() )
{
SMESHDS_SubMesh * eSubMesh = helper.GetMeshDS()->MeshElements( _geomEdge );
if ( !eSubMesh || eSubMesh->NbNodes() < 1 )
return;
TopLoc_Location loc;
Handle(Geom_Curve) C = BRep_Tool::Curve( _geomEdge, loc, f,l );
GeomAdaptor_Curve aCurve(C, f,l);
const double totLen = GCPnts_AbscissaPoint::Length(aCurve, f, l);
int nbExpectNodes = eSubMesh->NbNodes();
_initU .reserve( nbExpectNodes );
_normPar.reserve( nbExpectNodes );
_nodes .reserve( nbExpectNodes );
SMDS_NodeIteratorPtr nIt = eSubMesh->GetNodes();
while ( nIt->more() )
{
const SMDS_MeshNode* node = nIt->next();
if ( node->NbInverseElements(SMDSAbs_Edge) == 0 ||
node == tgtNode0 || node == tgtNode1 )
continue; // refinement nodes
_nodes.push_back( node );
_initU.push_back( helper.GetNodeU( _geomEdge, node ));
double len = GCPnts_AbscissaPoint::Length(aCurve, f, _initU.back());
_normPar.push_back( len / totLen );
}
}
else
{
// remove target node of the _LayerEdge from _nodes
int nbFound = 0;
for ( size_t i = 0; i < _nodes.size(); ++i )
if ( !_nodes[i] || _nodes[i] == tgtNode0 || _nodes[i] == tgtNode1 )
_nodes[i] = 0, nbFound++;
if ( nbFound == _nodes.size() )
_nodes.clear();
}
}
//================================================================================
/*!
* \brief Move nodes on EDGE from ends where _LayerEdge's are inflated
*/
//================================================================================
void _Shrinker1D::Compute(bool set3D, SMESH_MesherHelper& helper)
{
if ( _done || _nodes.empty())
return;
const _LayerEdge* e = _edges[0];
if ( !e ) e = _edges[1];
if ( !e ) return;
_done = (( !_edges[0] || _edges[0]->_pos.empty() ) &&
( !_edges[1] || _edges[1]->_pos.empty() ));
double f,l;
if ( set3D || _done )
{
Handle(Geom_Curve) C = BRep_Tool::Curve(_geomEdge, f,l);
GeomAdaptor_Curve aCurve(C, f,l);
if ( _edges[0] )
f = helper.GetNodeU( _geomEdge, _edges[0]->_nodes.back(), _nodes[0] );
if ( _edges[1] )
l = helper.GetNodeU( _geomEdge, _edges[1]->_nodes.back(), _nodes.back() );
double totLen = GCPnts_AbscissaPoint::Length( aCurve, f, l );
for ( size_t i = 0; i < _nodes.size(); ++i )
{
if ( !_nodes[i] ) continue;
double len = totLen * _normPar[i];
GCPnts_AbscissaPoint discret( aCurve, len, f );
if ( !discret.IsDone() )
return throw SALOME_Exception(LOCALIZED("GCPnts_AbscissaPoint failed"));
double u = discret.Parameter();
SMDS_EdgePosition* pos = static_cast<SMDS_EdgePosition*>( _nodes[i]->GetPosition() );
pos->SetUParameter( u );
gp_Pnt p = C->Value( u );
const_cast< SMDS_MeshNode*>( _nodes[i] )->setXYZ( p.X(), p.Y(), p.Z() );
}
}
else
{
BRep_Tool::Range( _geomEdge, f,l );
if ( _edges[0] )
f = helper.GetNodeU( _geomEdge, _edges[0]->_nodes.back(), _nodes[0] );
if ( _edges[1] )
l = helper.GetNodeU( _geomEdge, _edges[1]->_nodes.back(), _nodes.back() );
for ( size_t i = 0; i < _nodes.size(); ++i )
{
if ( !_nodes[i] ) continue;
double u = f * ( 1-_normPar[i] ) + l * _normPar[i];
SMDS_EdgePosition* pos = static_cast<SMDS_EdgePosition*>( _nodes[i]->GetPosition() );
pos->SetUParameter( u );
}
}
}
//================================================================================
/*!
* \brief Restore initial parameters of nodes on EDGE
*/
//================================================================================
void _Shrinker1D::RestoreParams()
{
if ( _done )
for ( size_t i = 0; i < _nodes.size(); ++i )
{
if ( !_nodes[i] ) continue;
SMDS_EdgePosition* pos = static_cast<SMDS_EdgePosition*>( _nodes[i]->GetPosition() );
pos->SetUParameter( _initU[i] );
}
_done = false;
}
//================================================================================
/*!
* \brief Replace source nodes by target nodes in shrinked mesh edges
*/
//================================================================================
void _Shrinker1D::SwapSrcTgtNodes( SMESHDS_Mesh* mesh )
{
const SMDS_MeshNode* nodes[3];
for ( int i = 0; i < 2; ++i )
{
if ( !_edges[i] ) continue;
SMESHDS_SubMesh * eSubMesh = mesh->MeshElements( _geomEdge );
if ( !eSubMesh ) return;
const SMDS_MeshNode* srcNode = _edges[i]->_nodes[0];
const SMDS_MeshNode* tgtNode = _edges[i]->_nodes.back();
SMDS_ElemIteratorPtr eIt = srcNode->GetInverseElementIterator(SMDSAbs_Edge);
while ( eIt->more() )
{
const SMDS_MeshElement* e = eIt->next();
if ( !eSubMesh->Contains( e ))
continue;
SMDS_ElemIteratorPtr nIt = e->nodesIterator();
for ( int iN = 0; iN < e->NbNodes(); ++iN )
{
const SMDS_MeshNode* n = static_cast<const SMDS_MeshNode*>( nIt->next() );
nodes[iN] = ( n == srcNode ? tgtNode : n );
}
mesh->ChangeElementNodes( e, nodes, e->NbNodes() );
}
}
}
//================================================================================
/*!
* \brief Creates 2D and 1D elements on boundaries of new prisms
*/
//================================================================================
bool _ViscousBuilder::addBoundaryElements()
{
SMESH_MesherHelper helper( *_mesh );
vector< const SMDS_MeshNode* > faceNodes;
for ( size_t i = 0; i < _sdVec.size(); ++i )
{
_SolidData& data = _sdVec[i];
TopTools_IndexedMapOfShape geomEdges;
TopExp::MapShapes( data._solid, TopAbs_EDGE, geomEdges );
for ( int iE = 1; iE <= geomEdges.Extent(); ++iE )
{
const TopoDS_Edge& E = TopoDS::Edge( geomEdges(iE));
if ( data._noShrinkShapes.count( getMeshDS()->ShapeToIndex( E )))
continue;
// Get _LayerEdge's based on E
map< double, const SMDS_MeshNode* > u2nodes;
if ( !SMESH_Algo::GetSortedNodesOnEdge( getMeshDS(), E, /*ignoreMedium=*/false, u2nodes))
continue;
vector< _LayerEdge* > ledges; ledges.reserve( u2nodes.size() );
TNode2Edge & n2eMap = data._n2eMap;
map< double, const SMDS_MeshNode* >::iterator u2n = u2nodes.begin();
{
//check if 2D elements are needed on E
TNode2Edge::iterator n2e = n2eMap.find( u2n->second );
if ( n2e == n2eMap.end() ) continue; // no layers on vertex
ledges.push_back( n2e->second );
u2n++;
if (( n2e = n2eMap.find( u2n->second )) == n2eMap.end() )
continue; // no layers on E
ledges.push_back( n2eMap[ u2n->second ]);
const SMDS_MeshNode* tgtN0 = ledges[0]->_nodes.back();
const SMDS_MeshNode* tgtN1 = ledges[1]->_nodes.back();
int nbSharedPyram = 0;
SMDS_ElemIteratorPtr vIt = tgtN0->GetInverseElementIterator(SMDSAbs_Volume);
while ( vIt->more() )
{
const SMDS_MeshElement* v = vIt->next();
nbSharedPyram += int( v->GetNodeIndex( tgtN1 ) >= 0 );
}
if ( nbSharedPyram > 1 )
continue; // not free border of the pyramid
faceNodes.clear();
faceNodes.push_back( ledges[0]->_nodes[0] );
faceNodes.push_back( ledges[1]->_nodes[0] );
if ( ledges[0]->_nodes.size() > 1 ) faceNodes.push_back( ledges[0]->_nodes[1] );
if ( ledges[1]->_nodes.size() > 1 ) faceNodes.push_back( ledges[1]->_nodes[1] );
if ( getMeshDS()->FindElement( faceNodes, SMDSAbs_Face, /*noMedium=*/true))
continue; // faces already created
}
for ( ++u2n; u2n != u2nodes.end(); ++u2n )
ledges.push_back( n2eMap[ u2n->second ]);
// Find out orientation and type of face to create
bool reverse = false, isOnFace;
map< TGeomID, TopoDS_Shape >::iterator e2f =
data._shrinkShape2Shape.find( getMeshDS()->ShapeToIndex( E ));
TopoDS_Shape F;
if (( isOnFace = ( e2f != data._shrinkShape2Shape.end() )))
{
F = e2f->second.Oriented( TopAbs_FORWARD );
reverse = ( helper.GetSubShapeOri( F, E ) == TopAbs_REVERSED );
if ( helper.GetSubShapeOri( data._solid, F ) == TopAbs_REVERSED )
reverse = !reverse, F.Reverse();
if ( helper.IsReversedSubMesh( TopoDS::Face(F) ))
reverse = !reverse;
}
else
{
// find FACE with layers sharing E
PShapeIteratorPtr fIt = helper.GetAncestors( E, *_mesh, TopAbs_FACE );
while ( fIt->more() && F.IsNull() )
{
const TopoDS_Shape* pF = fIt->next();
if ( helper.IsSubShape( *pF, data._solid) &&
!data._ignoreFaceIds.count( e2f->first ))
F = *pF;
}
}
// Find the sub-mesh to add new faces
SMESHDS_SubMesh* sm = 0;
if ( isOnFace )
sm = getMeshDS()->MeshElements( F );
else
sm = data._proxyMesh->getFaceSubM( TopoDS::Face(F), /*create=*/true );
if ( !sm )
return error("error in addBoundaryElements()", data._index);
// Make faces
const int dj1 = reverse ? 0 : 1;
const int dj2 = reverse ? 1 : 0;
for ( size_t j = 1; j < ledges.size(); ++j )
{
vector< const SMDS_MeshNode*>& nn1 = ledges[j-dj1]->_nodes;
vector< const SMDS_MeshNode*>& nn2 = ledges[j-dj2]->_nodes;
if ( nn1.size() == nn2.size() )
{
if ( isOnFace )
for ( size_t z = 1; z < nn1.size(); ++z )
sm->AddElement( getMeshDS()->AddFace( nn1[z-1], nn2[z-1], nn2[z], nn1[z] ));
else
for ( size_t z = 1; z < nn1.size(); ++z )
sm->AddElement( new SMDS_FaceOfNodes( nn1[z-1], nn2[z-1], nn2[z], nn1[z] ));
}
else if ( nn1.size() == 1 )
{
if ( isOnFace )
for ( size_t z = 1; z < nn2.size(); ++z )
sm->AddElement( getMeshDS()->AddFace( nn1[0], nn2[z-1], nn2[z] ));
else
for ( size_t z = 1; z < nn2.size(); ++z )
sm->AddElement( new SMDS_FaceOfNodes( nn1[0], nn2[z-1], nn2[z] ));
}
else
{
if ( isOnFace )
for ( size_t z = 1; z < nn1.size(); ++z )
sm->AddElement( getMeshDS()->AddFace( nn1[z-1], nn2[0], nn1[z] ));
else
for ( size_t z = 1; z < nn1.size(); ++z )
sm->AddElement( new SMDS_FaceOfNodes( nn1[z-1], nn2[0], nn2[z] ));
}
}
// Make edges
for ( int isFirst = 0; isFirst < 2; ++isFirst )
{
_LayerEdge* edge = isFirst ? ledges.front() : ledges.back();
_EdgesOnShape* eos = data.GetShapeEdges( edge );
if ( eos && eos->SWOLType() == TopAbs_EDGE )
{
vector< const SMDS_MeshNode*>& nn = edge->_nodes;
if ( nn.size() < 2 || nn[1]->GetInverseElementIterator( SMDSAbs_Edge )->more() )
continue;
helper.SetSubShape( eos->_sWOL );
helper.SetElementsOnShape( true );
for ( size_t z = 1; z < nn.size(); ++z )
helper.AddEdge( nn[z-1], nn[z] );
}
}
} // loop on EDGE's
} // loop on _SolidData's
return true;
}
Reference in New Issue View Git Blame Copy Permalink