# ClothColliderEvents.NewBodyCollisions.Collision A collision with a cloth body. ``` struct Collision ``` ## Topics ### Identifying the collider [`let bodyEntity: Entity`](/documentation/RealityKit/ClothColliderEvents/NewBodyCollisions/Collision/bodyEntity) The entity of the body that collided with the collider. [`var bodyComponent: ClothBodyComponent?`](/documentation/RealityKit/ClothColliderEvents/NewBodyCollisions/Collision/bodyComponent) The [`ClothBodyComponent`](/documentation/RealityKit/ClothBodyComponent) of the colliding body, if still present on the entity. ### Accessing affected particles [`func withParticleIndices((Span) -> Result) -> Result`](/documentation/RealityKit/ClothColliderEvents/NewBodyCollisions/Collision/withParticleIndices(_:)) Provides access to the indices of particles that collided with the collider. ## Relationships ### Conforms To [`Sendable`](/documentation/Swift/Sendable) [`SendableMetatype`](/documentation/Swift/SendableMetatype) --- 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)