Bevy tweening

When to use

Load this when a value should ease over time. A tween player is yours to build in ECS from elapsed time.

ECS shape

• Feature: EasingCurve samples an ease between two values. It is not a player that stores entity state.
• Components: a tween you own: start, end, elapsed, and duration.
• Systems: step elapsed time on Update with Time::delta_secs, then write Transform.
• Animation: property animation over a clip is AnimationClip on bevy-animation. That is a clip, not a one-shot UI tween.

[dependencies]
bevy = "0.20"

One system advances elapsed time. The eased t is EasingCurve::sample_clamped. Finished tweens are despawned by the marker, not by a callback type.