random.hpp

/*
    Random functions.
    Copyright (C) 2015 Denis BOURGE

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.

    This library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
    USA
*/

#ifndef HX3D_MATH_RANDOM
#define HX3D_MATH_RANDOM

#include <functional>
#include <vector>
#include <map>

namespace hx3d {
namespace math {

class WeightedRandom {
public:
  WeightedRandom();

  void define(int i, int weight, std::function<void()> f);

  int random();

private:
  std::vector<int> _vec;
  std::map<int, int> _weights;
  std::map<int, std::function<void()>> _map;

  int get_number(int gen);
  int total_count();
};

float randfloat();

int random(int min, int max);

bool flip_coin();

} /* math */
} /* hx3d */

#endif