Forward and reverse animations with RealityKit on Vision Pro

Hello!

I'm trying to play an animation with a toggle button. When the button is toggled the animation either plays forward from the first frame (.speed = 1) OR plays backward from the last frame (.speed = -1), so if the button is toggled when the animation is only halfway through, it 'jumps' to the first or last frame. The animation is 120 frames, and I want the position in playback to be preserved when the button is toggled - so the animation reverses or continues forward from whatever frame the animation was currently on.

Any tips on implementation? Thanks!

import RealityKit
import RealityKitContent
 
struct ModelView: View {
    var isPlaying: Bool
    
    @State private var scene: Entity? = nil
    @State private var unboxAnimationResource: AnimationResource? = nil
    
    var body: some View {
        RealityView { content in
            // Specify the name of the Entity you want
            scene = try? await Entity(named: "TestAsset", in: realityKitContentBundle)
            scene!.generateCollisionShapes(recursive: true)
            scene!.components.set(InputTargetComponent())
            content.add(scene!)
        
        } .installGestures()
            .onChange(of: isPlaying) {
                if (isPlaying){
                    var playerDefinition = scene!.availableAnimations[0].definition
                    playerDefinition.speed = 1
                    playerDefinition.repeatMode = .none
                    playerDefinition.trimDuration = 0
                    let playerAnimation = try! AnimationResource.generate(with: playerDefinition)
                    
                    scene!.playAnimation(playerAnimation)
                    
                } else {
                    var playerDefinition = scene!.availableAnimations[0].definition
                    playerDefinition.speed = -1
                    playerDefinition.repeatMode = .none
                    playerDefinition.trimDuration = 0
                    let playerAnimation = try! AnimationResource.generate(with: playerDefinition)
                    
                    scene!.playAnimation(playerAnimation)
 
                }
                
 
            }
    }
}

Thanks!