FoxWolfram.h

/**************************************************************************
 * basf2 (Belle II Analysis Software Framework)                           *
 * Author: The Belle II Collaboration                                     *
 *                                                                        *
 * See git log for contributors and copyright holders.                    *
 * This file is licensed under LGPL-3.0, see LICENSE.md.                  *
 **************************************************************************/
#pragma once
#include <Math/Vector3D.h>
#include <vector>
 
 
namespace Belle2 {
  class FoxWolfram {
  public:
 
    FoxWolfram();
 
 
    explicit FoxWolfram(const std::vector<ROOT::Math::XYZVector>& momenta)
    {
      m_momenta.clear();
      m_momenta = momenta;
    };
 
 
    ~FoxWolfram() {};
 
 
    void calculateBasicMoments();
 
 
    void calculateAllMoments();
 
 
    void setMomenta(const std::vector<ROOT::Math::XYZVector>& 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<ROOT::Math::XYZVector> m_momenta; 
  };
 
} // Belle2 namespace