com.bonzaiengine.procedural.util

Class Randomizer

java.lang.Object

com.bonzaiengine.procedural.util.Randomizer

public final class Randomizer
extends java.lang.Object

Field Summary

Fields

Modifier and Type	Field and Description
static long	LCG_MODULUS

Method Summary

Modifier and Type	Method and Description
static float	normalizeLCG(int r)
static int	randomLCG(int prevRandomValue) Linear Congruential Generator http://en.wikipedia.org/wiki/Linear_congruential_generator
static float	randomVDC(int n) Van der Corput sequence https://en.wikipedia.org/wiki/Van_der_Corput_sequence http://www.americanscientist.org/libraries/documents/2011631353538566-2011-07CompSciHayes.pdf http://rosettacode.org/wiki/Van_der_Corput_sequence#Java Quasi-random
static float	valueNoise(int x, int y, int z, int seed) Reference: http://freespace.virgin.net/hugo.elias/models/m_perlin.htm

Methods inherited from class java.lang.Object

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

Field Detail

LCG_MODULUS

public static final long LCG_MODULUS

See Also:

Constant Field Values

Method Detail

randomLCG

public static int randomLCG(int prevRandomValue)

Linear Congruential Generator
http://en.wikipedia.org/wiki/Linear_congruential_generator

Returns:

a random predictive number

normalizeLCG

public static float normalizeLCG(int r)

Returns:

a value in range [0;1]

randomVDC

public static float randomVDC(int n)

Van der Corput sequence
https://en.wikipedia.org/wiki/Van_der_Corput_sequence
http://www.americanscientist.org/libraries/documents/2011631353538566-2011-07CompSciHayes.pdf
http://rosettacode.org/wiki/Van_der_Corput_sequence#Java
Quasi-random

valueNoise

public static float valueNoise(int x,
                               int y,
                               int z,
                               int seed)

Reference: http://freespace.virgin.net/hugo.elias/models/m_perlin.htm

Returns:

a value in range [0;1]