G4GaussChebyshevQ Class Reference

#include <G4GaussChebyshevQ.hh>

Inheritance diagram for G4GaussChebyshevQ:

Public Member Functions
	G4GaussChebyshevQ (function pFunction, G4int nChebyshev)
	~G4GaussChebyshevQ ()
G4double	Integral (G4double a, G4double b) const

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Detailed Description

Definition at line 63 of file G4GaussChebyshevQ.hh.

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Constructor & Destructor Documentation

G4GaussChebyshevQ::G4GaussChebyshevQ	(	function	pFunction,
		G4int	nChebyshev
	)

Definition at line 36 of file G4GaussChebyshevQ.cc.

References G4VGaussianQuadrature::fAbscissa, G4VGaussianQuadrature::fNumber, G4VGaussianQuadrature::fWeight, and G4INCL::Math::pi.

   : G4VGaussianQuadrature(pFunction)
{
   fNumber = nChebyshev  ;   // Try to reduce fNumber twice ??
   G4double cof = pi/fNumber ;
   fAbscissa = new G4double[fNumber] ;
   fWeight = new G4double[fNumber] ;
   for(G4int i=0;i<fNumber;i++)
   {
      fAbscissa[i] = std::cos(cof*(i + 0.5)) ;
      fWeight[i] = cof*std::sqrt(1 - fAbscissa[i]*fAbscissa[i]) ;
   }
}

G4GaussChebyshevQ::~G4GaussChebyshevQ

(

)

Definition at line 54 of file G4GaussChebyshevQ.cc.

{
}

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Member Function Documentation

G4double G4GaussChebyshevQ::Integral	(	G4double	a,
		G4double	b
	)			const

Definition at line 64 of file G4GaussChebyshevQ.cc.

References G4VGaussianQuadrature::fAbscissa, G4VGaussianQuadrature::fFunction, G4VGaussianQuadrature::fNumber, and G4VGaussianQuadrature::fWeight.

{
   G4double xDiff=0.5*(b - a),
            xMean=0.5*(a + b),
            dx=0.0, integral=0.0 ;
   
   for(G4int i=0;i<fNumber;i++)
   {
      dx = xDiff*fAbscissa[i] ;
      integral += fWeight[i]*fFunction(xMean + dx)  ;
   }
   return integral *= xDiff ;
}

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The documentation for this class was generated from the following files:

• G4GaussChebyshevQ.hh
• G4GaussChebyshevQ.cc

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