/***************************************************************************** * Project: RooFit * * Package: RooFitModels * * File: $Id$ * Authors: * * GR, Gerhard Raven, Nikhef & VU, Gerhard.Raven@nikhef.nl * * * Copyright (c) 2010, Nikhef & VU. All rights reserved. * * * Redistribution and use in source and binary forms, * * with or without modification, are permitted according to the terms * * listed in LICENSE (http://roofit.sourceforge.net/license.txt) * *****************************************************************************/ #ifndef ROO_LEGENDRE #define ROO_LEGENDRE #include "RooAbsReal.h" #include "RooRealProxy.h" class RooLegendre : public RooAbsReal { public: RooLegendre() ; // an (associated) Legendre polynomial, P_l^m(x) // note: P_l(x) == P_l^0(x) RooLegendre(const char *name, const char *title, RooAbsReal& ctheta, int l, int m=0); // product of two associated Legendre polynomials, P_l1^m1(ctheta) * P_l2^m2(ctheta) RooLegendre(const char *name, const char *title, RooAbsReal& ctheta, int l1, int m1, int l2, int m2); RooLegendre(const RooLegendre& other, const char *name = nullptr); TObject* clone(const char* newname) const override { return new RooLegendre(*this, newname); } Int_t getAnalyticalIntegral(RooArgSet& allVars, RooArgSet& analVars, const char* rangeName=nullptr) const override ; double analyticalIntegral(Int_t code, const char* rangeName=nullptr) const override ; Int_t getMaxVal( const RooArgSet& vars) const override; double maxVal( Int_t code) const override; protected: // allow RooSpHarmonic access... RooRealProxy _ctheta; int _l1,_m1; int _l2,_m2; double evaluate() const override; void computeBatch(double* output, size_t size, RooFit::Detail::DataMap const&) const override; ClassDefOverride(RooLegendre,1) // Legendre polynomial }; #endif