src/random.h

   1 /*
   2   Copyright (c) 2006 Paolo Capriotti <p.capriotti@gmail.com>
   3             (c) 2006 Maurizio Monge <maurizio.monge@kdemail.net>
   4
   5   This program is free software; you can redistribute it and/or modify
   6   it under the terms of the GNU General Public License as published by
   7   the Free Software Foundation; either version 2 of the License, or
   8   (at your option) any later version.
   9 */
  10
  11 #ifndef RANDOM_H
  12 #define RANDOM_H
  13
  14 #include <boost/random/mersenne_twister.hpp>
  15 #include <boost/random/variate_generator.hpp>
  16 #include <boost/random/uniform_smallint.hpp>
  17 #include <boost/random/uniform_real.hpp>
  18
  19 class Random {
  20 public:
  21   typedef boost::mt19937 RandomGenerator;
  22   typedef boost::uniform_smallint<> IntegerDistribution;
  23   typedef boost::uniform_real<float> RealDistribution;
  24   typedef boost::variate_generator<RandomGenerator*, IntegerDistribution> IntegerGenerator;
  25   typedef boost::variate_generator<RandomGenerator*, RealDistribution> RealGenerator;
  26 private:
  27   RandomGenerator m_generator;
  28
  29   Random(); // singleton
  30   static Random* m_instance;
  31 public:
  32   IntegerGenerator rand(int min, int max);
  33   RealGenerator rand(float min, float max);
  34   RealGenerator rand(double min, double max);
  35
  36   static Random& instance();
  37 };
  38
  39 #endif // RANDOM_H