/data/refman/pasoursint/CMSSW_5_3_0/src/FastSimulation/Utilities/interface/BaseNumericalRandomGenerator.h

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#ifndef BaseNumericalRandomGenerator_H
#define BaseNumericalRandomGenerator_H

#include <vector>

class RandomEngine;

class BaseNumericalRandomGenerator
{
 public:

  BaseNumericalRandomGenerator(const RandomEngine* engine,
                               double xmin=0., 
                               double xmax=1., 
                               int n=1000, 
                               int iter=6);

  virtual ~BaseNumericalRandomGenerator() {}

  void initialize();

  double generate() const;

  double generateExp() const;

  double generateLin() const;

  // The probability density function, to be implemented in the real class
  virtual double function(double x)=0;

  bool setSubInterval(double x1,double x2);

 protected:

  const RandomEngine* random;

  std::vector<double> sampling;
  std::vector<double> f;
  double xmin, xmax;
  int n, iter;
  double rmin, deltar;
  
 private:

  int m;

};
#endif