# settlingDuration(target:initialVelocity:epsilon:) The estimated duration required for the spring system to be considered at rest. ``` func settlingDuration(target: V, initialVelocity: V = .zero, epsilon: Double) -> TimeInterval where V : VectorArithmetic ``` ## Discussion The epsilon value specifies the threshold for how small all subsequent values need to be before the spring is considered to have settled. --- 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)