A procedural noise generator whose output is an alternating square pattern.
Checkerboard noise can be useful as an input to GKNoise methods that create noise by combining other noise objects through various operations.
Like all GKNoiseSource subclasses, a checkerboard 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.