# init(weight:boneAxis:minimumAngles:maximumAngles:) Creates a joint limits definition. ``` init(weight: Float = 1.0, boneAxis: IKRig.Joint.LimitsDefinition.Axis = .x, minimumAngles: SIMD3 = [-2.0 * .pi, -2.0 * .pi, -2.0 * .pi], maximumAngles: SIMD3 = [2.0 * .pi, 2.0 * .pi, 2.0 * .pi]) ``` ## Parameters `weight` The weight of the joint rotation limit demand. `boneAxis` The axis around which the bone twists. `minimumAngles` The negative delta from the rest pose per-axis in radians. `maximumAngles` The positive delta from the rest pose per-axis in radians. ## Discussion> Important: The minimum angles need to be less than the maximum angles. --- 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)