visionos-animations

Use ProgressView for determinate or indeterminate 2D progress, add symbol effects like .variableColor for an animated status icon, and optionally spin a lightweight placeholder entity in RealityKit with a repeating FromToByAnimation while the job runs.

Create a FromToByAnimation targeting .transform with a rotation from 0 to pi around the Y axis, generate an AnimationResource, and call entity.playAnimation with res.repeat(). Retain the returned AnimationPlaybackController so you can stop the spin later.

Use SwiftUI for 2D UI in windows, ornaments, and overlays such as progress bars and symbol effects. Use RealityKit for 3D entity motion inside volumes and immersive spaces, such as spinning placeholders or playing baked USDZ animations.

Yes, models exported with animation expose clips through entity.availableAnimations. Play one with entity.playAnimation using a transitionDuration to crossfade, and call repeat() to loop it.

The AnimationPlaybackController returned by playAnimation was not retained, so stop() cannot be called later. Keep a reference to the controller and stop it when the job completes or in onDisappear.

Read the accessibilityReduceMotion environment value and substitute a calm fallback such as a static state or cross-fade instead of springs and spinning. Keep spatial motion small and slow to avoid discomfort.