TFCSLateralShapeParametrizationHitNumberFromE.h

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/*
  Copyright (C) 2002-2020 CERN for the benefit of the ATLAS collaboration
*/
 
#ifndef TFCSLateralShapeParametrizationHitNumberFromE_h
#define TFCSLateralShapeParametrizationHitNumberFromE_h
 
#include "ISF_FastCaloSimEvent/TFCSLateralShapeParametrizationHitBase.h"
 
#include "TH2.h"
 
class TFCSLateralShapeParametrizationHitNumberFromE
    : public TFCSLateralShapeParametrizationHitBase {
public:
  TFCSLateralShapeParametrizationHitNumberFromE(const char *name = nullptr,
                                                const char *title = nullptr,
                                                double stochastic = 0.1,
                                                double constant = 0);
 
  TFCSLateralShapeParametrizationHitNumberFromE(const char *name,
                                                const char *title,
                                                double stochastic,
                                                double stochastic_hadron,
                                                double constant);

  double
  get_sigma2_fluctuation(TFCSSimulationState &simulstate,
                         const TFCSTruthState *truth,
                         const TFCSExtrapolationState *extrapol) const override;
 
  int get_number_of_hits(TFCSSimulationState &simulstate,
                         const TFCSTruthState *truth,
                         const TFCSExtrapolationState *extrapol) const override;
 
  virtual bool operator==(const TFCSParametrizationBase &ref) const override;
 
  void Print(Option_t *option = "") const override;
 
protected:
  bool compare(const TFCSParametrizationBase &ref) const;
 
private:
  // Information for the fluctuation terms
  // The variation is calculated as:
  // sigma^2=[m_stochastic/sqrt(E/GeV)]^2 + [m_constant +
  // m_stochastic_hadron/sqrt(E/GeV)]^2
  double m_stochastic;
  double m_stochastic_hadron;
  double m_constant;
 
  ClassDefOverride(TFCSLateralShapeParametrizationHitNumberFromE,
                   2) // TFCSLateralShapeParametrizationHitNumberFromE
};
 
#endif