rng::basic_rng_t< Engine > Struct Template Reference

Random number generator wrapper around an rng engine. More...

#include <rng.hpp>

Public Member Functions
	basic_rng_t (const basic_rng_t &)=delete
basic_rng_t &	operator= (const basic_rng_t &)=delete
const char *	name () const
	Return engine name.
void	seed (uint64_t s)
	Seed rng engine.
uint64_t	reseed ()
	Reseed using current state.
void	reset ()
	Reset any state. More...
double	real ()
	Uniform distribution in range [0..1) More...
bool	roll (double chance)
	Bernoulli Distribution.
double	range (double min, double max)
	Uniform distribution in the range [min..max)
template<typename T , typename = std::enable_if_t<std::is_integral<T>::value>>
T	range (T min, T max)
	Uniform distribution in the range [min..max)
template<typename T , typename = std::enable_if_t<std::is_integral<T>::value>>
T	range (T max)
	Uniform distribution in the range [0..max)
double	gauss (double mean, double stddev, bool truncate_low_end=false)
	Gaussian Distribution. More...
double	exponential (double nu)
	Exponential Distribution.
double	exgauss (double gauss_mean, double gauss_stddev, double exp_nu)
	Exponentially Modified Gaussian Distribution.
timespan_t	range (timespan_t min, timespan_t max)
	Timespan uniform distribution in the range [min..max)
timespan_t	gauss (timespan_t mean, timespan_t stddev)
	Timespan Gaussian Distribution.
timespan_t	exgauss (timespan_t mean, timespan_t stddev, timespan_t nu)
	Timespan exponentially Modified Gaussian Distribution.

Detailed Description

template<typename Engine>
struct rng::basic_rng_t< Engine >

Random number generator wrapper around an rng engine.

Implements different distribution outputs ( uniform, gauss, etc. )

Member Function Documentation

gauss()

template<typename Engine >

double rng::basic_rng_t< Engine >::gauss	(	double	mean,
		double	stddev,
		bool	truncate_low_end = false
	)

Gaussian Distribution.

This code adapted from ftp://ftp.taygeta.com/pub/c/boxmuller.c Implements the Polar form of the Box-Muller Transformation

(c) Copyright 1994, Everett F. Carter Jr. Permission is granted by the author to use this software for any application provided this copyright notice is preserved.

real()

template<typename Engine >

double rng::basic_rng_t< Engine >::real ( )

inline

Uniform distribution in range [0..1)

MAGIC! http://en.wikipedia.org/wiki/Double-precision_floating-point_format

reset()

template<typename Engine >

void rng::basic_rng_t< Engine >::reset

(

)

Reset any state.

Reset state.