Release notes for stable interpolation

release-content/0.15/release-notes/13741_Stable_interpolation_and_smooth_following.md

@@ -0,0 +1,12 @@
+When animating cameras or programming unit AI (not that kind of AI!), moving something continuously towards a target is an essential basic operation.
+Simply [lerping] to the target seems easy enough, but as [Freya Holmer explains],
+making sure that this interpolation is timestep independent is both vital and surprisingly tricky.
+
+We've done the math for you; you just need to use the [`StableInterpolate`] trait's `interpolate_stable` and `smooth_nudge` methods
+and tune the `decay_rate` parameter to really optimize your _game feel_.
+Fear not: it even works on quaternions!
+Stable, smooth camera controllers have never been easier.
+
+[lerping]: https://en.wikipedia.org/wiki/Linear_interpolation
+[Freya Holmer explains]: https://www.youtube.com/watch?v=LSNQuFEDOyQ
+[`StableInterpolate`]: https://docs.rs/bevy/0.15.0-rc.3/bevy/math/trait.StableInterpolate.html

release-content/0.15/release-notes/_release-notes.toml

@@ -417,3 +417,10 @@ authors = ["@tychedelia"]
 contributors = ["@IceSentry"]
 prs = [14663]
 file_name = "14663_shader_storage_buffer.md"
+
+[[release_notes]]
+title = "Stable interpolation and smooth following"
+authors = ["@mweatherley"]
+contributors = []
+prs = [13741]
+file_name = "13741_Stable_interpolation_and_smooth_following.md"