FastSimulation/Utilities/interface/GaussianTail.h - master - githubmirror/cmssw

FastSimulation/Utilities/interface/GaussianTail.h

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24 май 2019, 00:14

24 май 2019, 00:14740c44a

#ifndef FastSimulation_Utilities_GaussianTail_H
#define FastSimulation_Utilities_GaussianTail_H

// Florian Beaudette (LLR).
// 11/09/06
// Gaussian tail generator. Copied from the GNU Scientific library

class RandomEngineAndDistribution;

class GaussianTail {
public:
  GaussianTail(double sigma = 1., double threshold = 2.);
  ~GaussianTail();
  inline void setParameters(double sigma, double threshold) {
    sigma_ = sigma;
    threshold_ = threshold;
    s_ = threshold_ / sigma_;
    ssquare_ = s_ * s_;
  };
  double shoot(RandomEngineAndDistribution const*) const;

private:
  double sigma_;
  double threshold_;
  double s_;
  double ssquare_;
};

#endif