# AnimationView An animation that represents a variation of another animation. ``` struct AnimationView ``` ## Overview This structure creates a variation of an existing animation by overriding its configuration. The term *view* in the name signifies that the variation represents a new visual perspective of the existing animation. ### Create a clip of an animation By supplying a new beginning time ([`trimStart`](/documentation/RealityKit/AnimationView/trimStart)) and ending time ([`trimEnd`](/documentation/RealityKit/AnimationView/trimEnd)), the following code creates a shorter clip of an existing animation. With [`trimStart`](/documentation/RealityKit/AnimationView/trimStart) set to `1.0` and [`trimEnd`](/documentation/RealityKit/AnimationView/trimEnd) at `2.0`, the clip spans a one-second duration. ```swift // Create or access an existing animation. let anim1 = FromToByAnimation(name: "Anim1", from: 100.0, to: 200.0, duration: 10.0) // Use a view to create a clip of the original animation. let view = AnimationView(source: anim1, name: "clip", bindTarget: nil, blendLayer: 0, repeatMode: .autoReverse, fillMode: [], trimStart: 1.0, trimEnd: 2.0, trimDuration: nil, offset: 0, delay: 0, speed: 1.0) // Create an animation resource from the clip. clipResource = try? AnimationResource.generate(with: view) // Play the clip. myModelEntity.playAnimation(clipResource) ``` ### Define a view in relation to the animation source The source animation’s timing properties define a *timeline* on which the [`trimDuration`](/documentation/RealityKit/AnimationView/trimDuration), [`delay`](/documentation/RealityKit/AnimationView/delay), and [`speed`](/documentation/RealityKit/AnimationView/speed) properties operate to derive the view. The [`trimDuration`](/documentation/RealityKit/AnimationView/trimDuration) property specifies which animation data the view displays. If [`trimDuration`](/documentation/RealityKit/AnimationView/trimDuration) exceeds the length of the source animation’s timeline, the animation plays according to the characteristics of [`repeatMode`](/documentation/RealityKit/AnimationView/repeatMode). The [`delay`](/documentation/RealityKit/AnimationView/delay) property defines a waiting period before the animation begins, and the [`speed`](/documentation/RealityKit/AnimationView/speed) determines how fast the view plays in relation to the original pace. ## Topics ### Creating an animation view [`init(source:name:bindTarget:blendLayer:repeatMode:fillMode:trimStart:trimEnd:trimDuration:offset:delay:speed:)`](/documentation/RealityKit/AnimationView/init(source:name:bindTarget:blendLayer:repeatMode:fillMode:trimStart:trimEnd:trimDuration:offset:delay:speed:)) Creates a variation of the given animation by overriding its properties. ### Configuring the animation view [`source`](/documentation/RealityKit/AnimationView/source) The original animation that this structure modifies. [`name`](/documentation/RealityKit/AnimationView/name) A textual name for the animation. [`bindTarget`](/documentation/RealityKit/AnimationView/bindTarget) A textual name that identifies the animated property. [`blendLayer`](/documentation/RealityKit/AnimationView/blendLayer) The order in which the framework composites the animation. ### Timing the animation [`speed`](/documentation/RealityKit/AnimationView/speed) A factor that increases or decreases the animation’s rate of playback. [`delay`](/documentation/RealityKit/AnimationView/delay) An amount of time that lapses before the animation plays. [`duration`](/documentation/RealityKit/AnimationView/duration) The total playback time of the animation. [`offset`](/documentation/RealityKit/AnimationView/offset) The time, in seconds, at which the animation begins within the duration. [`trimDuration`](/documentation/RealityKit/AnimationView/trimDuration) An optional duration that overrides the calculated duration. [`trimStart`](/documentation/RealityKit/AnimationView/trimStart) The time, in seconds, at which the source animation plays. [`trimEnd`](/documentation/RealityKit/AnimationView/trimEnd) The time, in seconds, at which the source animation stops. ### Repeating animation playback [`repeatMode`](/documentation/RealityKit/AnimationView/repeatMode) An option that determines how the animation repeats. [`fillMode`](/documentation/RealityKit/AnimationView/fillMode) An option that determines which data displays outside of the normal duration. --- 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)