TFCS1DFunctionSpline.h

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/*
  Copyright (C) 2002-2022 CERN for the benefit of the ATLAS collaboration
*/
 
#ifndef ISF_FASTCALOSIMEVENT_TFCS1DFunctionSpline_h
#define ISF_FASTCALOSIMEVENT_TFCS1DFunctionSpline_h
 
#include "CxxUtils/checker_macros.h"
 
#include "ISF_FastCaloSimEvent/TFCS1DFunction.h"
#include <TSpline.h>
#include <vector>
 
class TH1;
class TFCS1DFunctionInt32Histogram;
 
class ATLAS_NOT_THREAD_SAFE TFCS1DFunctionSpline : public TFCS1DFunction
//    ^ heavy use of gRandom, but class is not used anywhere
{
public:
  TFCS1DFunctionSpline(TH1 *hist = nullptr, double maxdevgoal = 0.01,
                       double maxeffsiggoal = 3, int maxnp = 20) {
    if (hist)
      Initialize(hist, maxdevgoal, maxeffsiggoal, maxnp);
  };
  ~TFCS1DFunctionSpline(){};
 
  static double get_maxdev(const TH1 *hist, const TSpline3 &sp,
                           double &maxeffsig, double &p_maxdev,
                           double &p_maxeffsig, int ntoy = 10000);
 
  double Initialize(TH1 *hist, double maxdevgoal = 0.01,
                    double maxeffsiggoal = 3, int maxnp = 20);
 
  double InitializeFromSpline(TH1 *hist, const TSpline3 &sp,
                              double maxdevgoal = 0.01,
                              double maxeffsiggoal = 3);
  double InitializeEqualDistance(TH1 *hist, double maxdevgoal = 0.01,
                                 double maxeffsiggoal = 3,
                                 int nsplinepoints = 5);
  double InitializeEqualProbability(TH1 *hist, double maxdevgoal = 0.01,
                                    double maxeffsiggoal = 3,
                                    int nsplinepoints = 5);
 
  using TFCS1DFunction::rnd_to_fct;
 
  virtual double rnd_to_fct(double rnd) const;
 
  const TSpline3 &spline() const { return m_spline; };
  TSpline3 &spline() { return m_spline; };
 
  static void unit_test ATLAS_NOT_THREAD_SAFE(TH1 *hist = nullptr);
 
protected:
  static double optimize(TSpline3 &sp_best, std::vector<double> &nprop,
                         const TH1 *hist,
                         TFCS1DFunctionInt32Histogram &hist_fct,
                         double maxdevgoal = 0.01, double maxeffsiggoal = 3);
 
  TSpline3 m_spline;
 
private:
  ClassDef(TFCS1DFunctionSpline, 1) // TFCS1DFunctionSpline
};
 
#endif