de.grogra.blocks.arrangeBlock
Class RandomGenerator

java.lang.Object
  de.grogra.blocks.arrangeBlock.RandomGenerator

All Implemented Interfaces:

ContinuousGenerator, Seedable

public class RandomGenerator
extends java.lang.Object
implements ContinuousGenerator

A random number generator producing pseudorandom numbers based on the value of a specific seed. The generator is a multiplicative linear congruential generator. It generates numbers through the following structure:

Y[1] = (742938285*Y[0]) mod (231-1)

The seed (Y[0]) provided is used to generate a sequence of pseudorandom numbers uniformly distributed between 0 and 1. The cycle of the generator is 231-2.

Author:

F.Mallet from Costas Simatos original

Constructor Summary

RandomGenerator()

RandomGenerator(long seed)

Method Summary

long	getSeed() Get the random number generator's seed.
long	nextLong()
void	reseed() Get another seed well-spaced (from the default SeedGenerator)
double	sample()
void	setSeed(long seed) Set the random number generator's seed.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

RandomGenerator

public RandomGenerator()

RandomGenerator

public RandomGenerator(long seed)

Method Detail

getSeed

public long getSeed()

Description copied from interface: Seedable

Get the random number generator's seed.

Specified by:

getSeed in interface Seedable

Returns:

The generator's seed

nextLong

public long nextLong()

Returns:

The next long random number in the sequence

reseed

public void reseed()

Description copied from interface: Seedable

Get another seed well-spaced (from the default SeedGenerator)

Specified by:

reseed in interface Seedable

sample

public double sample()

Specified by:

sample in interface ContinuousGenerator

setSeed

public void setSeed(long seed)

Description copied from interface: Seedable

Set the random number generator's seed.

Specified by:

setSeed in interface Seedable

Parameters:

seed - The new seed for the generator