Gabriele Cosmo
137 lines
5.4 KiB
C++
137 lines
5.4 KiB
C++
//
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// ********************************************************************
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// * License and Disclaimer *
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// * *
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// * The Geant4 software is copyright of the Copyright Holders of *
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// * the Geant4 Collaboration. It is provided under the terms and *
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// * conditions of the Geant4 Software License, included in the file *
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// * LICENSE and available at http://cern.ch/geant4/license . These *
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// * include a list of copyright holders. *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. Please see the license in the file LICENSE and URL above *
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// * for the full disclaimer and the limitation of liability. *
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// * *
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// * This code implementation is the result of the scientific and *
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// * technical work of the GEANT4 collaboration. *
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// * By using, copying, modifying or distributing the software (or *
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// * any work based on the software) you agree to acknowledge its *
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// * use in resulting scientific publications, and indicate your *
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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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//
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//
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// $Id: G4Integrator.hh 67970 2013-03-13 10:10:06Z gcosmo $
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//
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// Class description:
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//
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// Template class collecting integrator methods for generic funtions.
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// History:
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//
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// 04.09.99 V.Grichine, first implementation based on G4SimpleIntegration class
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// H.P.Wellisch, G.Cosmo, and E.Cherniaev advises
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// 08.09.99 V.Grichine, methods involving orthogonal polynomials
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//
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#ifndef G4INTEGRATOR_HH
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#define G4INTEGRATOR_HH 1
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#include "G4Types.hh"
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#include <cmath>
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#include <CLHEP/Units/PhysicalConstants.h>
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template <class T, class F>
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class G4Integrator
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{
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public: // with description
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G4Integrator(){;}
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~G4Integrator(){;}
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G4double Simpson( T& typeT, F f, G4double a, G4double b, G4int n ) ;
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G4double Simpson( T* ptrT, F f, G4double a, G4double b, G4int n ) ;
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G4double Simpson( G4double (*f)(G4double),
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G4double a, G4double b, G4int n ) ;
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// Simpson integration method
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G4double AdaptiveGauss( T& typeT, F f, G4double a, G4double b, G4double e ) ;
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G4double AdaptiveGauss( T* ptrT, F f, G4double a, G4double b, G4double e ) ;
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G4double AdaptiveGauss( G4double (*f)(G4double),
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G4double a, G4double b, G4double e ) ;
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// Adaptive Gauss method
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// Integration methods involving orthogohol polynomials
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G4double Legendre( T& typeT, F f, G4double a, G4double b, G4int n) ;
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G4double Legendre( T* ptrT, F f, G4double a, G4double b, G4int n) ;
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G4double Legendre( G4double (*f)(G4double), G4double a, G4double b, G4int n) ;
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//
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// Methods involving Legendre polynomials
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G4double Legendre10( T& typeT, F f,G4double a, G4double b) ;
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G4double Legendre10( T* ptrT, F f,G4double a, G4double b) ;
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G4double Legendre10( G4double (*f)(G4double), G4double a, G4double b) ;
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//
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// Legendre10 is very fast and accurate enough
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G4double Legendre96( T& typeT, F f,G4double a, G4double b) ;
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G4double Legendre96( T* ptrT, F f,G4double a, G4double b) ;
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G4double Legendre96( G4double (*f)(G4double), G4double a, G4double b) ;
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//
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// Legendre96 is very accurate and fast enough
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G4double Chebyshev( T& typeT, F f, G4double a, G4double b, G4int n) ;
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G4double Chebyshev( T* ptrT, F f, G4double a, G4double b, G4int n) ;
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G4double Chebyshev( G4double (*f)(G4double), G4double a, G4double b, G4int n) ;
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//
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// Methods involving Chebyshev polynomials
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G4double Laguerre( T& typeT, F f, G4double alpha, G4int n) ;
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G4double Laguerre( T* ptrT, F f, G4double alpha, G4int n) ;
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G4double Laguerre( G4double (*f)(G4double), G4double alpha, G4int n) ;
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//
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// Method involving Laguerre polynomials
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G4double Hermite( T& typeT, F f, G4int n) ;
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G4double Hermite( T* ptrT, F f, G4int n) ;
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G4double Hermite( G4double (*f)(G4double), G4int n) ;
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//
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// Method involving Hermite polynomials
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G4double Jacobi( T& typeT, F f, G4double alpha, G4double beta, G4int n) ;
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G4double Jacobi( T* ptrT, F f, G4double alpha, G4double beta, G4int n) ;
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G4double Jacobi( G4double (*f)(G4double), G4double alpha,
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G4double beta, G4int n) ;
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// Method involving Jacobi polynomials
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protected:
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// Auxiliary function for adaptive Gauss method
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G4double Gauss( T& typeT, F f, G4double a, G4double b ) ;
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G4double Gauss( T* ptrT, F f, G4double a, G4double b ) ;
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G4double Gauss( G4double (*f)(G4double), G4double a, G4double b) ;
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void AdaptGauss( T& typeT, F f, G4double a, G4double b,
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G4double e, G4double& sum, G4int& n) ;
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void AdaptGauss( T* typeT, F f, G4double a, G4double b,
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G4double e, G4double& sum, G4int& n ) ;
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void AdaptGauss( G4double (*f)(G4double), G4double a, G4double b,
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G4double e, G4double& sum, G4int& n ) ;
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G4double GammaLogarithm(G4double xx) ;
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} ;
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#include "G4Integrator.icc"
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#endif
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