com.alkacon.simapi.filter.math

Class Noise

java.lang.Object

com.alkacon.simapi.filter.math.Noise

All Implemented Interfaces:

Function1D, Function2D, Function3D

public class Noise
extends java.lang.Object
implements Function1D, Function2D, Function3D

Perlin Noise functions

Constructor Summary

Constructors

Constructor and Description
Noise()

Method Summary

Modifier and Type	Method and Description
float	evaluate(float x)
float	evaluate(float x, float y)
float	evaluate(float x, float y, float z)
static float[]	findRange(Function1D f, float[] minmax) Returns the minimum and maximum of a number of random values of the given function.
static float[]	findRange(Function2D f, float[] minmax) Returns the minimum and maximum of a number of random values of the given function.
static float	lerp(float t, float a, float b)
static float	noise1(float x) Compute 1-dimensional Perlin noise.
static float	noise2(float x, float y) Compute 2-dimensional Perlin noise.
static float	noise3(float x, float y, float z) Compute 3-dimensional Perlin noise.
static float	turbulence2(float x, float y, float octaves) Compute turbulence using Perlin noise.

Methods inherited from class java.lang.Object

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

Constructor Detail

Noise

public Noise()

Method Detail

evaluate

public float evaluate(float x)

Specified by:

evaluate in interface Function1D

evaluate

public float evaluate(float x,
                      float y)

Specified by:

evaluate in interface Function2D

evaluate

public float evaluate(float x,
                      float y,
                      float z)

Specified by:

evaluate in interface Function3D

turbulence2

public static float turbulence2(float x,
                                float y,
                                float octaves)

Compute turbulence using Perlin noise.

Parameters:

x - the x value

y - the y value

octaves - number of octaves of turbulence

Returns:

turbulence value at (x,y)

noise1

public static float noise1(float x)

Compute 1-dimensional Perlin noise.

Parameters:

x - the x value

Returns:

noise value at x in the range -1..1

noise2

public static float noise2(float x,
                           float y)

Compute 2-dimensional Perlin noise.

Parameters:

x - the x coordinate

y - the y coordinate

Returns:

noise value at (x,y)

noise3

public static float noise3(float x,
                           float y,
                           float z)

Compute 3-dimensional Perlin noise.

Parameters:

x - the x coordinate

y - the y coordinate

y - the y coordinate

Returns:

noise value at (x,y,z)

lerp

public static float lerp(float t,
                         float a,
                         float b)

findRange

public static float[] findRange(Function1D f,
                                float[] minmax)

Returns the minimum and maximum of a number of random values of the given function. This is useful for making some stab at normalising the function.

findRange

public static float[] findRange(Function2D f,
                                float[] minmax)

Returns the minimum and maximum of a number of random values of the given function. This is useful for making some stab at normalising the function.