rng.h

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#ifndef FCL_MATH_RNG_H
#define FCL_MATH_RNG_H
 
#include <cassert>
#include <random>
#include <iostream>
 
#include "fcl/math/constants.h"
#include "fcl/math/detail/seed.h"
 
namespace fcl
{
 
template <typename S>
class FCL_EXPORT RNG
{
public:
  RNG();
 
  S uniform01();
 
  S uniformReal(S lower_bound, S upper_bound);
 
  int uniformInt(int lower_bound, int upper_bound);
 
  bool uniformBool();
 
  S gaussian01();
 
  S gaussian(S mean, S stddev);
 
  S halfNormalReal(S r_min, S r_max, S focus = 3.0);
 
  int halfNormalInt(int r_min, int r_max, S focus = 3.0);
 
  void quaternion(S value[4]);
 
  void eulerRPY(S value[3]);
 
  void disk(S r_min, S r_max, S& x, S& y);
 
  void ball(S r_min, S r_max, S& x, S& y, S& z);
 
  static void setSeed(std::uint_fast32_t seed);
 
  static std::uint_fast32_t getSeed();
 
private:
 
  std::mt19937                     generator_;
  std::uniform_real_distribution<> uniDist_;
  std::normal_distribution<>       normalDist_;
 
};
 
using RNGf = RNG<float>;
using RNGd = RNG<double>;
 
} // namespace fcl
 
#include "fcl/math/rng-inl.h"
 
#endif