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# Changelog
The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
### Added
- Add user callbacks on tween started (`Tween::set_started`) and ended (`Tween::set_ended`).
- Implement `Default` for `AnimatorState` as `AnimatorState::Playing`.
- Added `Animator::with_state()` and `AssetAnimator::with_state()`, builder-like functions to override the default `AnimatorState`.
- Added `Tween::is_looping()` returning true for all but `TweeningType::Once`.
- Publicly exposed `Sequence<T>`, a sequence of tweens running one after the other.
- Publicly exposed `Animator<T>::tracks()` and `Animator<T>::tracks_mut()` to access the animation sequences running in parallel on multiple animation tracks.
### Changed
- Moved tween duration out of the `TweeningType` enum, which combined with the removal of the "pause" feature in loops makes it a C-like enum.
- Updated the `sequence` example to add some text showing the current sequence active tween index and its progress.
### Removed
- Removed the "pause" feature in-between loops of `TweeningType::Loop` and `TweeningType::PingPong`, which can be replaced if needed with a sequence including a no-op tween of the desired duration. Removed `Tween::is_paused()`.
### Fixed
- Fix missing public export of `component_animator_system()` and `asset_animator_system()` preventing the animation of all but the built-in items.
- Add `Tween<T>` describing a single tween animation, independently of its target (asset or component).
- Add `Tween<T>::is_paused()` to query when a tweening animation is in its pause phase, if any.
- Add `Tween<T>::direction()` to query the playback direction of a tweening animation (forward or backward).
- Add `Tween<T>::progress()` to query the progres ratio in [0:1] of a tweening animation.
- Enable multiple lenses per animator via "tracks", the ability to add multiple tween animations running in parallel on the same component.
- Enable sequences of tween animations running serially, one after the other, for each track of an animator, allowing to create more complex animations.
### Fixed
- Perform spherical linear interpolation (slerp) for `Quat` rotation of `Transform` animation via `TransformRotationLens`, instead of mere linear interpolation leaving the quaternion non-normalized.
## [0.2.0] - 2022-01-09
### Changed
- Update to Bevy 0.6
- Update to rust edition 2021
- Force Cargo resolver v2
### Added
- Added built-in lens `SpriteColorLens`, since the color of a `Sprite` is now an intrinsic property of the component in Bevy 0.6, and does not use `ColorMaterial` anymore.
## [0.1.0] - 2021-12-24
Initial version for Bevy 0.5