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PAL13615 (EDF PAL 315/31 GEOM SMESH : meshing of a "5 edges quadrangle")
add GetLength(const SMESH_Mesh* aMesh, const double edgeLength)
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@ -97,92 +97,133 @@ void StdMeshers_AutomaticLength::SetFineness(double theFineness)
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}
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}
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//================================================================================
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/*!
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* \brief Return pointer to TopoDS_TShape
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* \param theShape - The TopoDS_Shape
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* \retval inline const TopoDS_TShape* - result
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*/
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//================================================================================
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namespace {
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inline const TopoDS_TShape* getTShape(const TopoDS_Shape& theShape)
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{
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return theShape.TShape().operator->();
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//================================================================================
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/*!
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* \brief Return pointer to TopoDS_TShape
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* \param theShape - The TopoDS_Shape
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* \retval inline const TopoDS_TShape* - result
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*/
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//================================================================================
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inline const TopoDS_TShape* getTShape(const TopoDS_Shape& theShape)
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{
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return theShape.TShape().operator->();
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}
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//================================================================================
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/*!
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* \brief computes segment length by S0 and edge length
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*/
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//================================================================================
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const double a14divPI = 14. / PI;
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inline double segLength(double S0, double edgeLen, double minLen )
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{
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// PAL10237
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// S = S0 * f(L/Lmin) where f(x) = 1 + (2/Pi * 7 * atan(x/5) )
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// =>
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// S = S0 * ( 1 + 14/PI * atan( L / ( 5 * Lmin )))
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return S0 * ( 1. + a14divPI * atan( edgeLen / ( 5 * minLen )));
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}
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//================================================================================
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/*!
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* \brief Compute segment length for all edges
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* \param theMesh - The mesh
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* \param theTShapeToLengthMap - The map of edge to segment length
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*/
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//================================================================================
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void computeLengths( SMESHDS_Mesh* aMesh,
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map<const TopoDS_TShape*, double> & theTShapeToLengthMap,
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double & theS0,
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double & theMinLen)
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{
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theTShapeToLengthMap.clear();
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TopoDS_Shape aMainShape = aMesh->ShapeToMesh();
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// Find length of longest and shortest edge
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double Lmin = DBL_MAX, Lmax = -DBL_MAX;
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TopTools_IndexedMapOfShape edgeMap;
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TopExp::MapShapes( aMainShape, TopAbs_EDGE, edgeMap);
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for ( int i = 1; i <= edgeMap.Extent(); ++i )
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{
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TopoDS_Edge edge = TopoDS::Edge( edgeMap(i) );
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//if ( BRep_Tool::Degenerated( edge )) continue;
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Standard_Real L = SMESH_Algo::EdgeLength( edge );
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if ( L < DBL_MIN ) continue;
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if ( L > Lmax ) Lmax = L;
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if ( L < Lmin ) Lmin = L;
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// remember i-th edge length
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theTShapeToLengthMap.insert( make_pair( getTShape( edge ), L ));
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}
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// Compute S0
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// image attached to PAL10237
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// NbSeg
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// ^
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// |
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// 10|\
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// | \
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// | \
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// | \
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// 5| --------
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// |
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// +------------>
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// 1 10 Lmax/Lmin
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const int NbSegMin = 5, NbSegMax = 10; // on axis NbSeg
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const double Lrat1 = 1., Lrat2 = 10.; // on axis Lmax/Lmin
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double Lratio = Lmax/Lmin;
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double NbSeg = NbSegMin;
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if ( Lratio < Lrat2 )
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NbSeg += ( Lrat2 - Lratio ) / ( Lrat2 - Lrat1 ) * ( NbSegMax - NbSegMin );
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double S0 = Lmin / (int) NbSeg;
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MESSAGE( "S0 = " << S0 << ", Lmin = " << Lmin << ", Nbseg = " << (int) NbSeg);
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// Compute segments length for all edges
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map<const TopoDS_TShape*, double>::iterator tshape_length = theTShapeToLengthMap.begin();
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for ( ; tshape_length != theTShapeToLengthMap.end(); ++tshape_length )
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{
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double & L = tshape_length->second;
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L = segLength( S0, L, Lmin );
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}
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theS0 = S0;
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theMinLen = Lmin;
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}
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}
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//================================================================================
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//=============================================================================
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/*!
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* \brief Compute segment length for all edges
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* \param theMesh - The mesh
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* \param theTShapeToLengthMap - The map of edge to segment length
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* \brief Computes segment length for an edge of given length
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*/
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//================================================================================
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//=============================================================================
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static void computeLengths( SMESHDS_Mesh* aMesh,
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map<const TopoDS_TShape*, double> & theTShapeToLengthMap)
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double StdMeshers_AutomaticLength::GetLength(const SMESH_Mesh* theMesh,
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const double theEdgeLength)
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throw(SALOME_Exception)
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{
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theTShapeToLengthMap.clear();
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if ( !theMesh ) throw SALOME_Exception(LOCALIZED("NULL Mesh"));
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TopoDS_Shape aMainShape = aMesh->ShapeToMesh();
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// Find length of longest and shortest edge
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double Lmin = DBL_MAX, Lmax = -DBL_MAX;
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TopTools_IndexedMapOfShape edgeMap;
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TopExp::MapShapes( aMainShape, TopAbs_EDGE, edgeMap);
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for ( int i = 1; i <= edgeMap.Extent(); ++i )
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SMESHDS_Mesh* aMeshDS = const_cast< SMESH_Mesh* > ( theMesh )->GetMeshDS();
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if ( theMesh != _mesh )
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{
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TopoDS_Edge edge = TopoDS::Edge( edgeMap(i) );
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//if ( BRep_Tool::Degenerated( edge )) continue;
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Standard_Real L = SMESH_Algo::EdgeLength( edge );
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if ( L < DBL_MIN ) continue;
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if ( L > Lmax ) Lmax = L;
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if ( L < Lmin ) Lmin = L;
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// remember i-th edge length
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theTShapeToLengthMap.insert( make_pair( getTShape( edge ), L ));
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}
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// Compute S0
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// image attached to PAL10237
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// NbSeg
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// ^
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// |
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// 10|\
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// | \
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// | \
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// | \
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// 5| --------
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// |
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// +------------>
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// 1 10 Lmax/Lmin
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const int NbSegMin = 5, NbSegMax = 10; // on axis NbSeg
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const double Lrat1 = 1., Lrat2 = 10.; // on axis Lmax/Lmin
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double Lratio = Lmax/Lmin;
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double NbSeg = NbSegMin;
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if ( Lratio < Lrat2 )
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NbSeg += ( Lrat2 - Lratio ) / ( Lrat2 - Lrat1 ) * ( NbSegMax - NbSegMin );
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double S0 = Lmin / (int) NbSeg;
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MESSAGE( "S0 = " << S0 << ", Lmin = " << Lmin << ", Nbseg = " << (int) NbSeg);
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// Compute segments length for all edges
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// S = S0 * f(L/Lmin) where f(x) = 1 + (2/Pi * 7 * atan(x/5) )
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// =>
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// S = S0 * ( 1 + 14/PI * atan( L / ( 5 * Lmin )))
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const double a14divPI = 14. / PI, a5xLmin = 5 * Lmin;
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map<const TopoDS_TShape*, double>::iterator tshape_length = theTShapeToLengthMap.begin();
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for ( ; tshape_length != theTShapeToLengthMap.end(); ++tshape_length )
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{
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double & L = tshape_length->second;
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L = S0 * ( 1. + a14divPI * atan( L / a5xLmin ));
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computeLengths( aMeshDS, _TShapeToLength, _S0, _minLen );
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_mesh = theMesh;
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}
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double L = segLength( _S0, theEdgeLength, _minLen );
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return L / (theCoarseConst + theFineConst * _fineness);
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}
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//=============================================================================
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@ -203,7 +244,7 @@ double StdMeshers_AutomaticLength::GetLength(const SMESH_Mesh* theMesh,
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if ( theMesh != _mesh )
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{
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SMESHDS_Mesh* aMeshDS = const_cast< SMESH_Mesh* > ( theMesh )->GetMeshDS();
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computeLengths( aMeshDS, _TShapeToLength );
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computeLengths( aMeshDS, _TShapeToLength, _S0, _minLen );
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_mesh = theMesh;
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}
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@ -51,9 +51,18 @@ public:
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StdMeshers_AutomaticLength(int hypId, int studyId, SMESH_Gen * gen);
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virtual ~ StdMeshers_AutomaticLength();
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/*!
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* \brief Computes segment for a given edge
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*/
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double GetLength(const SMESH_Mesh* aMesh, const TopoDS_Shape& anEdge)
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throw(SALOME_Exception);
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/*!
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* \brief Computes segment length for an edge of given length
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*/
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double GetLength(const SMESH_Mesh* aMesh, const double edgeLength)
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throw(SALOME_Exception);
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/*!
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* \brief Set Fineness
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* \param theFineness - The Fineness value [0.0-1.0],
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@ -89,7 +98,7 @@ public:
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protected:
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std::map<const TopoDS_TShape*, double> _TShapeToLength;
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const SMESH_Mesh* _mesh;
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double _fineness;
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double _fineness, _S0, _minLen;
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};
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#endif
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