random.h File Reference

Random number library. More...

#include "mdapi/mdtypes.h"

Go to the source code of this file.

Classes
struct	Random_tag
	Random number class. More...
Typedefs
typedef long long	int64
typedef Random_tag	Random
	Random number class.
Functions
void	random_init (Random *r)
	Constructor.
void	random_initseed (Random *r, unsigned long seed)
	Constructor.
void	random_split (Random *r, int iStream, int numStreams)
	Split streams.
double	random_uniform (Random *r)
	Uniform distribution.
double	random_gaussian (Random *r)
	Gaussian distribution.
MD_Dvec	random_gaussian_vector (Random *r)
	Vector of Gaussian random numbers.
long	random_integer (Random *r)
	Random integer.

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Detailed Description

Random number library.

Author:

Martin Birgmeier

Date:

1993

The Random_tag class is a linear congruential generator for a pseudo-random number stream. The functional portion of the code, originally by Martin Birgmeier, is taken from NAMD. It has been turned into a class to provide thread-safe use.

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Typedef Documentation

typedef struct Random_tag Random

Random number class. Members should be treated as private. Stores random sequence state.

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Function Documentation

double random_gaussian (  Random *  r  )

Gaussian distribution. Determine a random number from a standard Gaussian distribution. Returns: the random number.

MD_Dvec random_gaussian_vector (  Random *  r  )

Vector of Gaussian random numbers. Generate a 3-vector of Gaussian random numbers. Returns: the random vector.

void random_init (  Random *  r  )

Constructor. Initializes random sequence using a seed of 0.

void random_initseed (  Random *  r, unsigned long  seed )

Constructor. Parameters: [in]  seed  Seeds random sequence. Initializes random sequence using specified seed.

long random_integer (  Random *  r  )

Random integer. Generate a random integer. Returns: the random integer.

void random_split (  Random *  r, int  iStream, int  numStreams )

Split streams. Parameters: [in]  iStream  Identifies stream to take. [in]  numStreams  Indicates number of streams. Split into numStreams number of streams and take stream numbered iStream.

double random_uniform (  Random *  r  )

Uniform distribution. Determine a random number uniformly distributed between 0 and 1. Returns: the random number.

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