0.12 AnimationPlayer updates section (#761)

Co-authored-by: Alice Cecile <[email protected]>
Co-authored-by: Carter Anderson <[email protected]>

content/news/2023-10-21-bevy-0.12/index.md

@@ -19,6 +19,32 @@ Since our last release a few months ago we've added a _ton_ of new features, bug
 
 <div class="release-feature-authors">authors: @author</div>
 
+## `AnimationPlayer` API Improvements
+
+<div class="release-feature-authors">authors: @devinleamy</div>
+
+The `AnimationPlayer` now has new methods for controlling playback, and utilities for checking
+if an animation is playing or completed, and getting its `AnimationClip` handle.
+
+`set_elapsed` and has been removed in favor of `seek_to`. `elapsed` now
+returns the actual elapsed time and is not affected by the animation speed. `stop_repeating` have been removed
+in favor of `set_repeat(RepeatAnimation::Never)`.
+
+```rust
+let mut player = q_animation_player.single_mut();
+// Check if an animation is complete.
+if player.is_finished() {
+    // Set the playback mode.
+    player.set_repeat(RepeatAnimation::Forever);
+    player.set_repeat(RepeatAnimation::Never);
+    player.set_repeat(RepeatAnimation::Count(4));
+}
+// Get a handle to the playing AnimationClip.
+let clip_handle = player.animation_clip();
+// Seek to 1s in the current clip.
+player.seek_to(1.0);
+```
+
 ## Ignore Ambiguous Components and Resources
 
 <div class="release-feature-authors">authors: @hymm</div>