Gabriele Cosmo
76 lines
3.0 KiB
C++
76 lines
3.0 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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// -------------------------------------------------------------------
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// GEANT4 Class file
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//
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//
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// File name: G4LegendrePolynomial
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//
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// Author: Jason Detwiler (jasondet@gmail.com)
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//
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// Creation date: February 2015
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//
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// Modifications: 29 October 2024 Isaac Kunen
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//
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// Legendre Polynomial
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//
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// -------------------------------------------------------------------
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#ifndef G4LEGENDREPOLYNOMIAL_HH
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#define G4LEGENDREPOLYNOMIAL_HH
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#include "globals.hh"
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#include <vector>
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#include <map>
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class G4LegendrePolynomial
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{
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public:
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// Access to coefficients
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static std::size_t GetNCoefficients(std::size_t order) { return order+1; }
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G4double GetCoefficient(std::size_t i, std::size_t order);
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// Evaluation functions
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G4double EvalLegendrePoly(G4int order, G4double x);
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G4double EvalAssocLegendrePoly(G4int l, G4int m, G4double x);
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// cache is not used; use EvalAssocLegendrePoly(l, m, x) instead.
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G4double EvalAssocLegendrePoly(G4int l, G4int m, G4double x,
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std::map<G4int, std::map<G4int, G4double> >* cache)
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{
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(void) cache; // suppress compiler warning for unused cache
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return EvalAssocLegendrePoly(l, m, x);
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}
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protected: // Cache coefficients for speed
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void BuildUpToOrder(std::size_t order);
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std::vector< std::vector<G4double> > fCoefficients;
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};
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#endif
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