# remapValues(toCurveWithControlPoints:) Replaces values in the noise field by mapping them to a curve that passes through the specified control points. ``` func remapValues(toCurveWithControlPoints controlPoints: [NSNumber : NSNumber]) ``` ## Parameters `controlPoints` A dictionary whose keys are input values in the existing noise, and whose values are the output values to replace the input values with. ## Discussion When you call this method, the [`GKNoise`](/documentation/GameplayKit/GKNoise) class first interpolates the values specified in the `controlPoints` parameter to create a smooth curve. Then, this method uses the curve to replace values in the noise field. For example, passing the control points `[-1.0: -1.0, -0.5: 0.5, 0.5: -0.5, 1.0: 1.0]` defines an S-shaped curve that leaves the lowest and highest values in the noise field unchanged, but replaces moderately low values with moderately high values and vice versa.  --- 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)