# distances The distance from the effect to each rigid body’s center of mass, or nil if distance information was not requested. ``` let distances: UnsafeForceEffectBuffer? ``` --- 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)