# SampledAnimation.SkeletalAnimationOperation Operations that can be performed on skeletal animations. ``` struct SkeletalAnimationOperation ``` ## Topics ### Converting to additive animation [`static func convertToAdditive(baseAnimation: AnimationResource) -> SampledAnimation.SkeletalAnimationOperation`](/documentation/RealityKit/SampledAnimation/SkeletalAnimationOperation/convertToAdditive(baseAnimation:)) Converts animation to additive format by subtracting a base animation. [`static func convertToAdditiveUsingRestPose() -> SampledAnimation.SkeletalAnimationOperation`](/documentation/RealityKit/SampledAnimation/SkeletalAnimationOperation/convertToAdditiveUsingRestPose()) Converts animation to additive format by subtracting the skeleton’s rest pose. [`static func convertToAdditiveUsingFirstSample() -> SampledAnimation.SkeletalAnimationOperation`](/documentation/RealityKit/SampledAnimation/SkeletalAnimationOperation/convertToAdditiveUsingFirstSample()) Converts animation to additive format by subtracting the first frame. ### Extracting root motion [`static func extractRootMotion(jointName: String, options: SampledAnimation.SkeletalAnimationOperation.RootMotionOptions, lockPosition: Transform?) -> SampledAnimation.SkeletalAnimationOperation`](/documentation/RealityKit/SampledAnimation/SkeletalAnimationOperation/extractRootMotion(jointName:options:lockPosition:)) Extracts root motion from the specified joint. [`struct RootMotionOptions`](/documentation/RealityKit/SampledAnimation/SkeletalAnimationOperation/RootMotionOptions) Options for controlling root motion extraction. ### Removing animation content [`static func removeAnimation(for: String) -> SampledAnimation.SkeletalAnimationOperation`](/documentation/RealityKit/SampledAnimation/SkeletalAnimationOperation/removeAnimation(for:)) Removes animation for the specified joint. --- 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)