Class NoiseSimplex

java.lang.Object

gaiasky.util.noise.NoiseSimplex

All Implemented Interfaces:

INoise

public class NoiseSimplex
extends Object
implements INoise

Java implementation of the Simplex noise algorithm. This is a port of the GLSL gln_simplex function from assets/shader/lib/noise/simplex.glsl. The algorithm produces identical noise values for the same inputs.

Field Summary

Fields inherited from interface INoise

MAX_FBM_ITERATIONS

Modifier and Type	Field	Description
static final int	MAX_FBM_ITERATIONS

Constructor Summary

Constructors

Constructor	Description
NoiseSimplex()

Method Summary

Modifier and Type	Method	Description
double	evaluate(Vec3 v)	Generates 3D Simplex Noise at the given point.

Methods inherited from class Object

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

Methods inherited from interface INoise

fbm, map, normalize, permute, rand, rand, rand, rand2, rand3, rand4, taylorInvSqrt

Modifier and Type	Method	Description
default double	fbm(Vec3 v, FbmOpts opts)	Generates 3D Fractional Brownian motion (fBm) from the implementing noise.
default double	map(double value, double min1, double max1, double min2, double max2)	Maps a value from one range to another.
default double	normalize(double v)	Normalises a value from [-1,1] to [0,1].
default double	permute(double x)	Permutation function used by the Simplex noise implementation.
default double	rand(double n)	Single float random based on a seed.
default double	rand(Vec2 p)	2‑D random based on a vec2.
default Vec3	rand(Vec3 p)	3‑D random based on a vec3.
default Vec2	rand2(Vec2 p)	2‑D random hash.
default Vec3	rand3(Vec3 p)	3‑D random hash (used by GLSL rand3).
default Vec4	rand4(Vec4 p)	4‑D random hash (mirrors GLSL rand4).
default double	taylorInvSqrt(double r)	Taylor inverse square root approximation used in GLSL.

Constructor Details

NoiseSimplex

public NoiseSimplex()

Method Details

evaluate

public double evaluate(Vec3 v)

Generates 3D Simplex Noise at the given point. Equivalent to GLSL: gln_simplex(v)

Specified by:

evaluate in interface INoise

Parameters:

v - The point at which the noise must be evaluated.

Returns:

The noise value.