cn.apiclub.captcha.filter.math

类 Noise

java.lang.Object

cn.apiclub.captcha.filter.math.Noise

所有已实现的接口:

Function1D, Function2D, Function3D

public class Noise
extends Object
implements Function1D, Function2D, Function3D

Perlin Noise functions

构造器概要

构造器

构造器和说明
Noise()

方法概要

方法

限定符和类型	方法和说明
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.
static float	turbulence3(float x, float y, float z, float octaves) Compute turbulence using Perlin noise.

从类继承的方法 java.lang.Object

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

构造器详细资料

Noise

public Noise()

方法详细资料

evaluate

public float evaluate(float x)

指定者:

evaluate 在接口中 Function1D

evaluate

public float evaluate(float x,
             float y)

指定者:

evaluate 在接口中 Function2D

evaluate

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

指定者:

evaluate 在接口中 Function3D

turbulence2

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

Compute turbulence using Perlin noise.

参数:

x - the x value

y - the y value

octaves - number of octaves of turbulence

返回:

turbulence value at (x,y)

turbulence3

public static float turbulence3(float x,
                float y,
                float z,
                float octaves)

Compute turbulence using Perlin noise.

参数:

x - the x value

y - the y value

octaves - number of octaves of turbulence

返回:

turbulence value at (x,y)

noise1

public static float noise1(float x)

Compute 1-dimensional Perlin noise.

参数:

x - the x value

返回:

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

noise2

public static float noise2(float x,
           float y)

Compute 2-dimensional Perlin noise.

参数:

x - the x coordinate

y - the y coordinate

返回:

noise value at (x,y)

noise3

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

Compute 3-dimensional Perlin noise.

参数:

x - the x coordinate

y - the y coordinate

y - the y coordinate

返回:

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.