# velocity(in:) The velocity of the translation gesture in the space of the specified entity. ``` @MainActor @preconcurrency func velocity(in entity: Entity?) -> SIMD3 ``` ## Parameters `entity` The entity in whose space the velocity of the translation gesture is computed. A `nil` entity will result in world space. ## Return Value The velocity of the translation gesture, in the space of the specified entity, in meters per second. --- 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)