Implements a random number generator using the Marsaglia method. More...
#include "sst/core/rng/marsaglia.h"
Public Member Functions | |
MarsagliaRNG (unsigned int initial_z, unsigned int initial_w) | |
Creates a new Marsaglia RNG using the initial seeds. | |
MarsagliaRNG () | |
Creates a new Marsaglia RNG using random initial seeds (which are read from the system clock). | |
void | restart (unsigned int new_z, unsigned int new_w) |
Restart the random number generator with new seeds. | |
double | nextUniform () |
Generates the next random number as a double in the range 0 to 1. | |
uint32_t | generateNextUInt32 () |
Generates the next random number as an unsigned 32-bit integer. | |
uint64_t | generateNextUInt64 () |
Generates the next random number as an unsigned 64-bit integer. | |
int64_t | generateNextInt64 () |
Generates the next number as a signed 64-bit integer. | |
int32_t | generateNextInt32 () |
Generates the next number as a signed 32-bit integer. |
Implements a random number generator using the Marsaglia method.
This method is computationally cheap and provides a reasonable distribution of random numbers. If you need additional strength in the random numbers you may want to consider the Mersenne RNG.
For more information see the Multiply-with-carry Random Number Generator article at Wikipedia (http://en.wikipedia.org/wiki/Multiply-with-carry).
MarsagliaRNG::MarsagliaRNG | ( | unsigned int | initial_z, | |
unsigned int | initial_w | |||
) |
Creates a new Marsaglia RNG using the initial seeds.
[in] | initial_z | One of the random seed pairs |
[in] | initial_w | One of the random seed pairs. |
MarsagliaRNG::MarsagliaRNG | ( | ) |
Creates a new Marsaglia RNG using random initial seeds (which are read from the system clock).
Note that these will create variation between runs and between platforms.
void MarsagliaRNG::restart | ( | unsigned int | new_z, | |
unsigned int | new_w | |||
) |
Restart the random number generator with new seeds.
[in] | new_z | A new Z-seed |
[in] | new_w | A new W-seed |