Class

GKCylindersNoiseSource

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

Declaration

@interface GKCylindersNoiseSource : GKNoiseSource

Overview

All noise sources generate infinite 3D fields of noise values, but this fact is especially relevant to cylinder noise: by rotating a noise object in 3D, you can sample the noise in ways that “slice” across or along the cylinders. Use this technique (combined with other noise sources and noise processing operations) to create effects such as wood-grain textures.

Figure 1

Example output from a cylinder noise source

Like all GKNoiseSource subclasses, a cylinder 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

- initWithFrequency:

Initializes a cylinder noise source with the specified frequency.

+ cylindersNoiseWithFrequency:

Creates a cylinder noise source with the specified frequency.

Managing Noise Generation Parameters

frequency

A value that determines the size and spacing of concentric cylinders.

Relationships

Inherits From

See Also

Procedural Noise

GKNoiseSource

The abstract superclass for procedural noise generators.

GKNoise

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

GKNoiseMap

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

GKCoherentNoiseSource

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

GKBillowNoiseSource

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

GKPerlinNoiseSource

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

GKRidgedNoiseSource

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

GKVoronoiNoiseSource

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

GKSpheresNoiseSource

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

GKCheckerboardNoiseSource

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

GKConstantNoiseSource

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