FoxWolfram.h

/**************************************************************************
 * BASF2 (Belle Analysis Framework 2)                                     *
 * Copyright(C) 2010 - Belle II Collaboration                             *
 *                                                                        *
 * Author: The Belle II Collaboration                                     *
 * Contributors:  Mikihiko Nakao (KEK), Pablo Goldenzweig (KIT),          *
 *                Umberto Tamponi (tamponi@to.infn.it)                    *
 *                                                                        *
 * Original module writen by M. Nakao for Belle                           *
 * Ported to Belle II by P. Goldenzweig                                   *
 * Modified by U. Tamponi                                                 *
 *                                                                        *
 * This software is provided "as is" without any warranty.                *
 **************************************************************************/
#pragma once
#include <TVector3.h>
#include <vector>
 
 
namespace Belle2 {
  class FoxWolfram {
  public:
 
    FoxWolfram();
 
 
    explicit FoxWolfram(const std::vector<TVector3>& momenta)
    {
      m_momenta.clear();
      m_momenta = momenta;
    };
 
 
    ~FoxWolfram() {};
 
 
    void calculateBasicMoments();
 
 
    void calculateAllMoments();
 
 
    void setMomenta(const std::vector<TVector3>& momenta)
    {
      m_momenta.clear();
      m_momenta = momenta;
      return;
    };
 
    double getH(int i) const { return (i < 0 || i > 8) ? NAN : m_moment[i]; }
 
    double getR(int i) const { return (i < 0 || i > 8 || m_moment[0] == 0) ? NAN : m_moment[i] / m_moment[0]; }
 
 
  private:
    double m_moment[9] = {0.}; 
    std::vector<TVector3> m_momenta; 
  };
 
} // Belle2 namespace