// Module : SMESH
// $Header$
-using namespace std;
#include "StdMeshers_NumberOfSegments.hxx"
-#include <Standard_ErrorHandler.hxx>
-#include <TCollection_AsciiString.hxx>
+
+#include "StdMeshers_Distribution.hxx"
+#include "SMESHDS_SubMesh.hxx"
+#include "SMESH_Mesh.hxx"
+
+#include "CASCatch.hxx"
+
#include <ExprIntrp_GenExp.hxx>
+#include <Expr_Array1OfNamedUnknown.hxx>
#include <Expr_NamedUnknown.hxx>
+#include <TColStd_Array1OfReal.hxx>
+#include <TCollection_AsciiString.hxx>
+#include <TopExp.hxx>
+#include <TopTools_IndexedMapOfShape.hxx>
+
+using namespace std;
const double PRECISION = 1e-7;
_numberOfSegments(1),
_distrType(DT_Regular),
_scaleFactor(1.),
- _expMode(false)
+ _convMode(1) //cut negative by default
{
_name = "NumberOfSegments";
- _param_algo_dim = 1;
+ _param_algo_dim = 1;
}
//=============================================================================
{
}
+//=============================================================================
+/*!
+ *
+ */
+//=============================================================================
+const std::vector<double>& StdMeshers_NumberOfSegments::BuildDistributionExpr( const char* expr, int nbSeg, int conv )
+throw ( SALOME_Exception )
+{
+ if( !buildDistribution( TCollection_AsciiString( ( Standard_CString )expr ), conv, 0.0, 1.0, nbSeg, _distr, 1E-4 ) )
+ _distr.resize( 0 );
+ return _distr;
+}
+
+const std::vector<double>& StdMeshers_NumberOfSegments::BuildDistributionTab( const std::vector<double>& tab,
+ int nbSeg, int conv )
+throw ( SALOME_Exception )
+{
+ if( !buildDistribution( tab, conv, 0.0, 1.0, nbSeg, _distr, 1E-4 ) )
+ _distr.resize( 0 );
+ return _distr;
+}
+
//=============================================================================
/*!
*
throw SALOME_Exception(LOCALIZED("not a scale distribution"));
if (scaleFactor < PRECISION)
throw SALOME_Exception(LOCALIZED("scale factor must be positive"));
- if (fabs(scaleFactor - 1.0) < PRECISION)
- throw SALOME_Exception(LOCALIZED("scale factor must not be equal to 1"));
+ //if (fabs(scaleFactor - 1.0) < PRECISION)
+ // throw SALOME_Exception(LOCALIZED("scale factor must not be equal to 1"));
if (fabs(_scaleFactor - scaleFactor) > PRECISION)
{
double prev = -PRECISION;
bool isSame = table.size() == _table.size();
+ bool pos = false;
for (i=0; i < table.size()/2; i++) {
double par = table[i*2];
double val = table[i*2+1];
+ if( _convMode==0 )
+ {
+ CASCatch_TRY
+ {
+ val = pow( 10.0, val );
+ }
+ CASCatch_CATCH(Standard_Failure)
+ {
+ Handle(Standard_Failure) aFail = Standard_Failure::Caught();
+ throw SALOME_Exception( LOCALIZED( "invalid value"));
+ return;
+ }
+ }
+ else if( _convMode==1 && val<0.0 )
+ val = 0.0;
+
if ( par<0 || par > 1)
throw SALOME_Exception(LOCALIZED("parameter of table function is out of range [0,1]"));
if ( fabs(par-prev)<PRECISION )
throw SALOME_Exception(LOCALIZED("two parameters are the same"));
- if (val < PRECISION)
+ if ( val < 0 )
throw SALOME_Exception(LOCALIZED("value of table function is not positive"));
+ if( val>PRECISION )
+ pos = true;
if (isSame)
{
double oldpar = _table[i*2];
prev = par;
}
- if (!isSame)
+ if( !pos )
+ throw SALOME_Exception(LOCALIZED("value of table function is not positive"));
+
+ if( pos && !isSame )
{
_table = table;
NotifySubMeshesHypothesisModification();
/*! check if only 't' is unknown variable in expression
*/
//================================================================================
-bool isCorrect( const Handle( Expr_GeneralExpression )& expr )
+bool isCorrectArg( const Handle( Expr_GeneralExpression )& expr )
{
- if( expr.IsNull() )
- return true;
-
+ Handle( Expr_NamedUnknown ) sub = Handle( Expr_NamedUnknown )::DownCast( expr );
+ if( !sub.IsNull() )
+ return sub->GetName()=="t";
+
bool res = true;
for( int i=1, n=expr->NbSubExpressions(); i<=n && res; i++ )
{
- Handle( Expr_GeneralExpression ) subexpr = expr->SubExpression( i );
- Handle( Expr_NamedUnknown ) name = Handle( Expr_NamedUnknown )::DownCast( subexpr );
+ Handle( Expr_GeneralExpression ) sub = expr->SubExpression( i );
+ Handle( Expr_NamedUnknown ) name = Handle( Expr_NamedUnknown )::DownCast( sub );
if( !name.IsNull() )
{
if( name->GetName()!="t" )
- res = false;
+ res = false;
}
else
- res = isCorrect( subexpr );
+ res = isCorrectArg( sub );
}
return res;
}
* ( result in 'syntax' ) and if only 't' is unknown variable in expression ( result in 'args' )
*/
//================================================================================
-void casProcess( const TCollection_AsciiString& str, bool& syntax, bool& args )
+bool process( const TCollection_AsciiString& str, int convMode,
+ bool& syntax, bool& args,
+ bool& non_neg, bool& non_zero,
+ bool& singulars, double& sing_point )
{
- // check validity of expression
+ bool parsed_ok = true;
+ Handle( ExprIntrp_GenExp ) myExpr;
+ CASCatch_TRY
+ {
+ myExpr = ExprIntrp_GenExp::Create();
+ myExpr->Process( str.ToCString() );
+ }
+ CASCatch_CATCH(Standard_Failure)
+ {
+ Handle(Standard_Failure) aFail = Standard_Failure::Caught();
+ parsed_ok = false;
+ }
+
syntax = false;
args = false;
- try
+ if( parsed_ok && myExpr->IsDone() )
{
- Handle( ExprIntrp_GenExp ) gen = ExprIntrp_GenExp::Create();
- gen->Process( str );
-
- if( gen->IsDone() )
- {
- syntax = true;
- args = isCorrect( gen->Expression() );
- }
+ syntax = true;
+ args = isCorrectArg( myExpr->Expression() );
}
- catch (Standard_Failure)
+
+ bool res = parsed_ok && syntax && args;
+ if( !res )
+ myExpr.Nullify();
+
+ non_neg = true;
+ singulars = false;
+ non_zero = false;
+
+ if( res )
{
+ FunctionExpr f( str.ToCString(), convMode );
+ const int max = 500;
+ for( int i=0; i<=max; i++ )
+ {
+ double t = double(i)/double(max), val;
+ if( !f.value( t, val ) )
+ {
+ sing_point = t;
+ singulars = true;
+ break;
+ }
+ if( val<0 )
+ {
+ non_neg = false;
+ break;
+ }
+ if( val>PRECISION )
+ non_zero = true;
+ }
}
+ return res && non_neg && non_zero && ( !singulars );
}
//================================================================================
str.RemoveAll('\r');
str.RemoveAll('\n');
- bool syntax, args;
- casProcess( str, syntax, args );
- if( !syntax )
- throw SALOME_Exception(LOCALIZED("invalid expression syntax"));
- if( !args )
- throw SALOME_Exception(LOCALIZED("only 't' may be used as function argument"));
+ bool syntax, args, non_neg, singulars, non_zero;
+ double sing_point;
+ bool res = process( str, _convMode, syntax, args, non_neg, non_zero, singulars, sing_point );
+ if( !res )
+ {
+ if( !syntax )
+ throw SALOME_Exception(LOCALIZED("invalid expression syntax"));
+ if( !args )
+ throw SALOME_Exception(LOCALIZED("only 't' may be used as function argument"));
+ if( !non_neg )
+ throw SALOME_Exception(LOCALIZED("only non-negative function can be used as density"));
+ if( singulars )
+ {
+ char buf[1024];
+ sprintf( buf, "Function has singular point in %.3f", sing_point );
+ throw SALOME_Exception( buf );
+ }
+ if( !non_zero )
+ throw SALOME_Exception(LOCALIZED("f(t)=0 cannot be used as density"));
- string func(str.ToCString());
- if (_func != func)
+ return;
+ }
+
+ std::string func = expr;
+ if( _func != func )
{
_func = func;
NotifySubMeshesHypothesisModification();
*/
//================================================================================
-void StdMeshers_NumberOfSegments::SetExponentMode(bool isExp)
+void StdMeshers_NumberOfSegments::SetConversionMode( int conv )
throw(SALOME_Exception)
{
if (_distrType != DT_TabFunc && _distrType != DT_ExprFunc)
throw SALOME_Exception(LOCALIZED("not a functional distribution"));
- if (isExp != _expMode)
+ if( conv != _convMode )
{
- _expMode = isExp;
+ _convMode = conv;
NotifySubMeshesHypothesisModification();
}
}
*/
//================================================================================
-bool StdMeshers_NumberOfSegments::IsExponentMode() const
+int StdMeshers_NumberOfSegments::ConversionMode() const
throw(SALOME_Exception)
{
if (_distrType != DT_TabFunc && _distrType != DT_ExprFunc)
throw SALOME_Exception(LOCALIZED("not a functional distribution"));
- return _expMode;
+ return _convMode;
}
//=============================================================================
}
if (_distrType == DT_TabFunc || _distrType == DT_ExprFunc)
- save << " " << (int)_expMode;
+ save << " " << _convMode;
return save;
}
else
load.clear(ios::badbit | load.rdstate());
- // read ditribution type
- isOK = (load >> a);
+ // read second stored value. It can be two variants here:
+ // 1. If the hypothesis is stored in old format (nb.segments and scale factor),
+ // we wait here the scale factor, which is double.
+ // 2. If the hypothesis is stored in new format
+ // (nb.segments, distr.type, some other params.),
+ // we wait here the ditribution type, which is integer
+ double scale_factor;
+ isOK = (load >> scale_factor);
+ a = (int)scale_factor;
+
+ // try to interprete ditribution type,
+ // supposing that this hypothesis was written in the new format
if (isOK)
{
if (a < DT_Regular || a > DT_ExprFunc)
if (isOK)
_scaleFactor = b;
else
+ {
load.clear(ios::badbit | load.rdstate());
+ // this can mean, that the hypothesis is stored in old format
+ _distrType = DT_Regular;
+ _scaleFactor = scale_factor;
+ }
}
break;
case DT_TabFunc:
{
isOK = (load >> a);
if (isOK)
+ {
_table.resize(a, 0.);
+ int i;
+ for (i=0; i < _table.size(); i++)
+ {
+ isOK = (load >> b);
+ if (isOK)
+ _table[i] = b;
+ else
+ load.clear(ios::badbit | load.rdstate());
+ }
+ }
else
- load.clear(ios::badbit | load.rdstate());
- int i;
- for (i=0; i < _table.size(); i++)
{
- isOK = (load >> b);
- if (isOK)
- _table[i] = b;
- else
- load.clear(ios::badbit | load.rdstate());
+ load.clear(ios::badbit | load.rdstate());
+ // this can mean, that the hypothesis is stored in old format
+ _distrType = DT_Regular;
+ _scaleFactor = scale_factor;
}
}
break;
if (isOK)
_func = str;
else
+ {
load.clear(ios::badbit | load.rdstate());
+ // this can mean, that the hypothesis is stored in old format
+ _distrType = DT_Regular;
+ _scaleFactor = scale_factor;
+ }
}
break;
case DT_Regular:
{
isOK = (load >> a);
if (isOK)
- _expMode = (bool) a;
+ _convMode = a;
else
load.clear(ios::badbit | load.rdstate());
}
{
return hyp.LoadFrom( load );
}
+
+//================================================================================
+/*!
+ * \brief Initialize number of segments by the mesh built on the geometry
+ * \param theMesh - the built mesh
+ * \param theShape - the geometry of interest
+ * \retval bool - true if parameter values have been successfully defined
+ */
+//================================================================================
+
+bool StdMeshers_NumberOfSegments::SetParametersByMesh(const SMESH_Mesh* theMesh,
+ const TopoDS_Shape& theShape)
+{
+ if ( !theMesh || theShape.IsNull() )
+ return false;
+
+ _numberOfSegments = 0;
+ _distrType = DT_Regular;
+
+ int nbEdges = 0;
+ TopTools_IndexedMapOfShape edgeMap;
+ TopExp::MapShapes( theShape, TopAbs_EDGE, edgeMap );
+ for ( int i = 1; i <= edgeMap.Extent(); ++i )
+ {
+ // get current segment length
+ SMESHDS_Mesh* aMeshDS = const_cast< SMESH_Mesh* >( theMesh )->GetMeshDS();
+ SMESHDS_SubMesh * eSubMesh = aMeshDS->MeshElements( edgeMap( i ));
+ if ( eSubMesh && eSubMesh->NbElements())
+ _numberOfSegments += eSubMesh->NbElements();
+
+ ++nbEdges;
+ }
+ if ( nbEdges )
+ _numberOfSegments /= nbEdges;
+
+ return nbEdges;
+}
