hmi.math
Class PerlinNoise

java.lang.Object
  hmi.math.PerlinNoise

public class PerlinNoise
extends Object

Author:

welberge Generates noise fluently interpolated through random points between some uppperlimit and lowerlimit

Field Summary

private static int	DEFAULT_NR_OF_POINTS
private float[]	g
private static int	randoms

Constructor Summary

PerlinNoise(float lowerLimit, float upperLimit)
Constructor, creates DEFAULT_NR_OF_POINTS random points

PerlinNoise(int nr, float lowerLimit, float upperLimit)
Constructor, creates nr random points

Method Summary

private float	getG(int index)
private float	getG(int index, int length)
void	initialize(float lowerLimit, float upperLimit) Initialize random points
float	noise(float t) Get the noise value at time t
float	noise(float t, int l) Get the noise value at time t, loop after l random points

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_NR_OF_POINTS

private static final int DEFAULT_NR_OF_POINTS

See Also:

Constant Field Values

g

private float[] g

randoms

private static int randoms

Constructor Detail

PerlinNoise

public PerlinNoise(int nr,
                   float lowerLimit,
                   float upperLimit)

Constructor, creates nr random points

Parameters:

nr - number of random points to generate

lowerLimit - lowest value for a random point

upperLimit - highest value for a random point

PerlinNoise

public PerlinNoise(float lowerLimit,
                   float upperLimit)

Constructor, creates DEFAULT_NR_OF_POINTS random points

Parameters:

lowerLimit - lowest value for a random point

upperLimit - highest value for a random point

Method Detail

initialize

public void initialize(float lowerLimit,
                       float upperLimit)

Initialize random points

Parameters:

lowerLimit - lowest value for a random point

upperLimit - highest value for a random point

getG

private float getG(int index)

getG

private float getG(int index,
                   int length)

noise

public float noise(float t)

Get the noise value at time t

Parameters:

t - time

Returns:

the noise value

noise

public float noise(float t,
                   int l)

Get the noise value at time t, loop after l random points

Parameters:

t - time

l - length

Returns:

the noise value