Class

GKPerlinNoiseSource

A procedural noise generator whose output is a type of fractal coherent noise resembling natural phenomena such as clouds and terrain.

Declaration

class GKPerlinNoiseSource : GKCoherentNoiseSource

Overview

Like all GKNoiseSource subclasses, a Perlin noise source represents a noise generation algorithm and its parameters. To make use of a noise source, first create GKNoise object from it (and optionally apply operations to that noise object or combine it with other noise objects). Then create a GKNoiseMap object from your noise object, generating a concrete field of values that you can sample from directly or visualize using the SKTexture or SKTileMap class.

Topics

Creating a Noise Source

init(frequency: Double, octaveCount: Int, persistence: Double, lacunarity: Double, seed: Int32)

Initializes a Perlin noise source with the specified parameters.

Managing Noise Generation Parameters

var persistence: Double

The rate at which successive octaves of the noise function decrease in amplitude.

Relationships

Conforms To

See Also

Procedural Noise

class GKNoiseSource

The abstract superclass for procedural noise generators.

class GKNoise

A representation of procedural noise, generated by a noise source, that you can use to process, transform, or combine noise.

class GKNoiseMap

A sample of procedural noise data from which you can read noise values directly or create noise textures.

class GKCoherentNoiseSource

The abstract superclass for procedural noise generators that create coherent noise.

class GKBillowNoiseSource

A procedural noise generator whose output is a type of fractal coherent noise with smooth features.

class GKRidgedNoiseSource

A procedural noise generator whose output is a type of multifractal coherent noise with sharply defined features.

class GKVoronoiNoiseSource

A procedural noise generator whose output (also called Worley noise or cellular noise) divides space into discrete cells surrounding random seed points.

class GKCylindersNoiseSource

A procedural noise generator whose output is a 3D field of concentric cylindrical shells.

class GKSpheresNoiseSource

A procedural noise generator whose output is a 3D field of concentric spherical shells.

class GKCheckerboardNoiseSource

A procedural noise generator whose output is an alternating square pattern.

class GKConstantNoiseSource

A procedural noise generator that outputs a field of a single constant value.