FunctionExpr Class Reference

#include <StdMeshers_Distribution.hxx>

Inheritance diagram for FunctionExpr:

Public Member Functions
	FunctionExpr (const char *, const int)
virtual	~FunctionExpr ()
virtual Standard_Boolean	Value (const Standard_Real, Standard_Real &)
virtual bool	value (const double, double &) const
virtual double	integral (const double, const double) const
Private Member Functions
	Handle (ExprIntrp_GenExp) myExpr
Private Attributes
Expr_Array1OfNamedUnknown	myVars
TColStd_Array1OfReal	myValues

---

Detailed Description

Definition at line 89 of file StdMeshers_Distribution.hxx.

---

Constructor & Destructor Documentation

FunctionExpr::FunctionExpr	(	const char *	str,
		const int	conv
	)

Definition at line 185 of file StdMeshers_Distribution.cxx.

References Handle(), and myVars.

: Function( conv ),
  myVars( 1, 1 ),
  myValues( 1, 1 )
{
  bool ok = true;
  try {
#ifdef NO_CAS_CATCH
    OCC_CATCH_SIGNALS;
#endif
    myExpr = ExprIntrp_GenExp::Create();
    myExpr->Process( ( Standard_CString )str );
  } catch(Standard_Failure) {
    Handle(Standard_Failure) aFail = Standard_Failure::Caught();
    ok = false;
  }

  if( !ok || !myExpr->IsDone() )
    myExpr.Nullify();

  myVars.ChangeValue( 1 ) = new Expr_NamedUnknown( "t" );
}

FunctionExpr::~FunctionExpr

(

)

[virtual]

Definition at line 208 of file StdMeshers_Distribution.cxx.

{
}

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Member Function Documentation

FunctionExpr.Handle

(

ExprIntrp_GenExp

)

[private]

Referenced by FunctionExpr(), and value().

double FunctionExpr::integral	(	const double	a,
		const double	b
	)		const [virtual]

Implements Function.

Definition at line 242 of file StdMeshers_Distribution.cxx.

References MESSAGE, and SMESH_AdvancedEditor.res.

{
  double res = 0.0;
  try {
#ifdef NO_CAS_CATCH
    OCC_CATCH_SIGNALS;
#endif
    math_GaussSingleIntegration _int
      ( *static_cast<math_Function*>( const_cast<FunctionExpr*> (this) ), a, b, 20 );
    if( _int.IsDone() )
      res = _int.Value();
  } catch(Standard_Failure) {
    res = 0.0;
    MESSAGE( "Exception in integral calculating" );
  }
  return res;
}

Standard_Boolean FunctionExpr::Value	(	const Standard_Real	T,
		Standard_Real &	F
	)		[virtual]

Definition at line 212 of file StdMeshers_Distribution.cxx.

References SMESH_AdvancedEditor.res, and value().

{
  double f;
  Standard_Boolean res = value( T, f );
  F = f;
  return res;
}

bool FunctionExpr::value	(	const double	t,
		double &	f
	)		const [virtual]

Reimplemented from Function.

Definition at line 220 of file StdMeshers_Distribution.cxx.

References Handle(), myValues, and myVars.

Referenced by Value().

{
  if( myExpr.IsNull() )
    return false;

  ( ( TColStd_Array1OfReal& )myValues ).ChangeValue( 1 ) = t;
  bool ok = true;
  try {
#ifdef NO_CAS_CATCH
    OCC_CATCH_SIGNALS;
#endif
    f = myExpr->Expression()->Evaluate( myVars, myValues );
  } catch(Standard_Failure) {
    Handle(Standard_Failure) aFail = Standard_Failure::Caught();
    f = 0.0;
    ok = false;
  }

  ok = Function::value( t, f ) && ok;
  return ok;
}

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Field Documentation

TColStd_Array1OfReal FunctionExpr.myValues [private]

Definition at line 101 of file StdMeshers_Distribution.hxx.

Referenced by value().

Expr_Array1OfNamedUnknown FunctionExpr.myVars [private]

Definition at line 100 of file StdMeshers_Distribution.hxx.

Referenced by FunctionExpr(), and value().