OpenSimplexNoise

Inherits: Resource < Reference < Object

Noise generator based on Open Simplex.

Description

This resource allows you to configure and sample a fractal noise space. Here is a brief usage example that configures an OpenSimplexNoise and gets samples at various positions and dimensions:

var noise = OpenSimplexNoise.new()

# Configure
noise.seed = randi()
noise.octaves = 4
noise.period = 20.0
noise.persistence = 0.8

# Sample
print("Values:")
print(noise.get_noise_2d(1.0, 1.0))
print(noise.get_noise_3d(0.5, 3.0, 15.0))
print(noise.get_noise_4d(0.5, 1.9, 4.7, 0.0))

Properties

float lacunarity 2.0
int octaves 3
float period 64.0
float persistence 0.5
int seed 0

Methods

Image get_image ( int width, int height )
float get_noise_1d ( float x )
float get_noise_2d ( float x, float y )
float get_noise_2dv ( Vector2 pos )
float get_noise_3d ( float x, float y, float z )
float get_noise_3dv ( Vector3 pos )
float get_noise_4d ( float x, float y, float z, float w )
Image get_seamless_image ( int size )

Property Descriptions

float lacunarity

Default 2.0
Setter set_lacunarity(value)
Getter get_lacunarity()

Difference in period between octaves.

int octaves

Default 3
Setter set_octaves(value)
Getter get_octaves()

Number of OpenSimplex noise layers that are sampled to get the fractal noise. Higher values result in more detailed noise but take more time to generate.

Note: The maximum allowed value is 9.

float period

Default 64.0
Setter set_period(value)
Getter get_period()

Period of the base octave. A lower period results in a higher-frequency noise (more value changes across the same distance).

float persistence

Default 0.5
Setter set_persistence(value)
Getter get_persistence()

Contribution factor of the different octaves. A persistence value of 1 means all the octaves have the same contribution, a value of 0.5 means each octave contributes half as much as the previous one.

int seed

Default 0
Setter set_seed(value)
Getter get_seed()

Seed used to generate random values, different seeds will generate different noise maps.

Method Descriptions

Image get_image ( int width, int height )

Generate a noise image with the requested width and height, based on the current noise parameters.

float get_noise_1d ( float x )

Returns the 1D noise value [-1,1] at the given x-coordinate.

Note: This method actually returns the 2D noise value [-1,1] with fixed y-coordinate value 0.0.

float get_noise_2d ( float x, float y )

Returns the 2D noise value [-1,1] at the given position.

float get_noise_2dv ( Vector2 pos )

Returns the 2D noise value [-1,1] at the given position.

float get_noise_3d ( float x, float y, float z )

Returns the 3D noise value [-1,1] at the given position.

float get_noise_3dv ( Vector3 pos )

Returns the 3D noise value [-1,1] at the given position.

float get_noise_4d ( float x, float y, float z, float w )

Returns the 4D noise value [-1,1] at the given position.

Image get_seamless_image ( int size )

Generate a tileable noise image, based on the current noise parameters. Generated seamless images are always square (size × size).

© 2014–2020 Juan Linietsky, Ariel Manzur, Godot Engine contributors
Licensed under the MIT License.
https://docs.godotengine.org/en/3.2/classes/class_opensimplexnoise.html