Acceptance.h

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#ifndef ACCEPTANCE_H
#define ACCEPTANCE_H
 
#include "CbmBilinearSplineFunction.h"
#include "TMath.h"
#include <vector>
 
namespace Acceptance {
 
  struct AcceptanceFunction {
    Double_t dy, dpt;
    std::vector<Double_t> ys, pts, probs;
    BilinearSplineFunction sfunc;
    void setSpline() { sfunc.setData(ys, pts, probs); }
    Double_t getAcceptance(const Double_t& y, const Double_t& pt) const;
    AcceptanceFunction() : dy(), dpt(), ys(), pts(), probs(), sfunc() {}
  };
 
  struct ReconstructionEfficiencyFunction {
    Double_t p1, p2, p3;
    ReconstructionEfficiencyFunction(double p1_ = 1.,
                                     double p2_ = 0.,
                                     double p3_ = 1.)
      : p1(p1_), p2(p2_), p3(p3_) {}
    Double_t f(double p) { return p1 - p2 * TMath::Exp(-p * p / 2. / p3 / p3); }
  };
 
  int ReadAcceptanceFunction(AcceptanceFunction& func, TString filename);
}  // namespace Acceptance
 
#endif