Package jme3utilities.math.noise

Class Noise

java.lang.Object

jme3utilities.math.noise.Noise

public final class Noise
extends Object

Pseudo-random and noise utility methods. Aside from test cases, all methods should be public and static.

Method Summary

Modifier and Type	Method	Description
static float	fbmNoise(Noise2 noise2, float sampleX, float sampleY, int numOctaves, float fundamental, float gain, float lacunarity)	Sample fractional Brownian motion (FBM) noise in 2 dimensions.
static Generator	getSharedGenerator()	Access the shared generator.
static float	nextFloat()	Obtain the next uniformly distributed, pseudo-random, single-precision value from the shared generator.
static void	reseedGenerator(long newSeed)	Re-seed the shared generator.

Methods inherited from class java.lang.Object

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

Method Details

fbmNoise

public static float fbmNoise(Noise2 noise2,
 float sampleX,
 float sampleY,
 int numOctaves,
 float fundamental,
 float gain,
 float lacunarity)

Sample fractional Brownian motion (FBM) noise in 2 dimensions.

Parameters:

noise2 - base noise noise2 (not null)

sampleX - the first coordinate of the sample point

sampleY - the 2nd coordinate of the sample point

numOctaves - number of noise components (>0)

fundamental - frequency for the first component (>0)

gain - amplitude ratio between octaves (>0, <1)

lacunarity - frequency ratio between octaves (>1)

Returns:

noise value (range depends on parameters)

getSharedGenerator

public static Generator getSharedGenerator()

Access the shared generator.

Returns:

float value (≥0, <1)

nextFloat

public static float nextFloat()

Obtain the next uniformly distributed, pseudo-random, single-precision value from the shared generator.

Returns:

float value (≥0, <1)

See Also:

• FastMath.nextRandomFloat()

reseedGenerator

public static void reseedGenerator(long newSeed)

Re-seed the shared generator.

Parameters:

newSeed - seed for generating pseudo-random numbers