# GKConstantNoiseSource A procedural noise generator that outputs a field of a single constant value. ``` class GKConstantNoiseSource ``` ## Overview Constant noise can be useful as an input to [`GKNoise`](/documentation/GameplayKit/GKNoise) methods that create noise by combining other noise objects through various operations. For example, when using the [`displaceWithNoises(x:y:z:)`](/documentation/GameplayKit/GKNoise/displaceWithNoises(x:y:z:)) method you can pass constant noise for some parameters and non-constant noise for other parameters, resulting in a variable displacement along one axis but constant or no displacement along the others.  Like all [`GKNoiseSource`](/documentation/GameplayKit/GKNoiseSource) subclasses, a constant noise source represents a noise generation algorithm and its parameters. To make use of a noise source, first create [`GKNoise`](/documentation/GameplayKit/GKNoise) object from it (and optionally apply operations to that noise object or combine it with other noise objects). Then create a [`GKNoiseMap`](/documentation/GameplayKit/GKNoiseMap) object from your noise object, generating a concrete field of values that you can sample from directly or visualize using the or `SKTileMap` class. ## Topics ### Creating a Noise Source [`init(value:)`](/documentation/GameplayKit/GKConstantNoiseSource/init(value:)) Initializes a noise source with the specified constant value. [`constantNoise(withValue:)`](/documentation/GameplayKit/GKConstantNoiseSource/constantNoise(withValue:)) Creates a noise source with the specified constant value. ### Managing Noise Generation Parameters [`value`](/documentation/GameplayKit/GKConstantNoiseSource/value) The constant value for the generated noise. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)