random.h File Reference

Pseudo random number generator. More...

#include <lescegra/util/object.h>

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Data Structures

struct LsgRandom

Pseudo random number generator class using the Mersenne Twister algorithm. More...

Defines

#define LSG_RANDOM_H 1

#define LSG_RANDOM_STATE_SIZE 624

Functions

LsgRandom * LsgRandom_create (unsigned long int seed)

void LsgRandom_init (LsgRandom *self, unsigned long int seed)

unsigned long int LsgRandom_generate (LsgRandom *self)

float LsgRandom_random (LsgRandom *self)

float LsgRandom_randomMax (LsgRandom *self, float limit)

float LsgRandom_randomError (LsgRandom *self)

float LsgRandom_randomRange (LsgRandom *self, float base, float error)

void random_seed (unsigned long int seed)

float random (void)

float random_max (float max)

float random_error (void)

float random_range (float base, float error)

Detailed Description

Pseudo random number generator.

Function Documentation

void random_seed ( unsigned long int seed )

Seed the random number generator.
Parameters:

seed The new seed

float random ( void )

Compute a pseudo random float between 0.0 and 1.0 exclusive.
Returns:
A random float in the range [0.0, 1.0]

float random_max ( float max )

Compute a pseudo random number between 0.0 and a given maximum.
Parameters:

max The upper limit for the generated random number

Returns:
A random number in the range [0.0, max]

float random_error ( void )

Compute a pseudo random number between -1.0 and +1.0.
Parameters:

A random number in the range [-1.0, +1.0]

float random_range ( float base,

float error

)

Compute a pseudo random number in a range defined by its center and extent.
Parameters:

base The center of the range

error The extent of the range in each direction

Returns:
A random number in the range [base - error, base + error]


Data Structures
struct	LsgRandom
	Pseudo random number generator class using the Mersenne Twister algorithm. More...
Defines
#define	LSG_RANDOM_H 1
#define	LSG_RANDOM_STATE_SIZE 624
Functions
LsgRandom *	LsgRandom_create (unsigned long int seed)
void	LsgRandom_init (LsgRandom *self, unsigned long int seed)
unsigned long int	LsgRandom_generate (LsgRandom *self)
float	LsgRandom_random (LsgRandom *self)
float	LsgRandom_randomMax (LsgRandom *self, float limit)
float	LsgRandom_randomError (LsgRandom *self)
float	LsgRandom_randomRange (LsgRandom *self, float base, float error)
void	random_seed (unsigned long int seed)
float	random (void)
float	random_max (float max)
float	random_error (void)
float	random_range (float base, float error)