bevy/assets
Patrick Walton dfdf2b9ea4
Implement the AnimationGraph, allowing for multiple animations to be blended together. (#11989)
This is an implementation of RFC #51:
https://github.com/bevyengine/rfcs/blob/main/rfcs/51-animation-composition.md

Note that the implementation strategy is different from the one outlined
in that RFC, because two-phase animation has now landed.

# Objective

Bevy needs animation blending. The RFC for this is [RFC 51].

## Solution

This is an implementation of the RFC. Note that the implementation
strategy is different from the one outlined there, because two-phase
animation has now landed.

This is just a draft to get the conversation started. Currently we're
missing a few things:

- [x] A fully-fleshed-out mechanism for transitions
- [x] A serialization format for `AnimationGraph`s
- [x] Examples are broken, other than `animated_fox`
- [x] Documentation

---

## Changelog

### Added

* The `AnimationPlayer` has been reworked to support blending multiple
animations together through an `AnimationGraph`, and as such will no
longer function unless a `Handle<AnimationGraph>` has been added to the
entity containing the player. See [RFC 51] for more details.

* Transition functionality has moved from the `AnimationPlayer` to a new
component, `AnimationTransitions`, which works in tandem with the
`AnimationGraph`.

## Migration Guide

* `AnimationPlayer`s can no longer play animations by themselves and
need to be paired with a `Handle<AnimationGraph>`. Code that was using
`AnimationPlayer` to play animations will need to create an
`AnimationGraph` asset first, add a node for the clip (or clips) you
want to play, and then supply the index of that node to the
`AnimationPlayer`'s `play` method.

* The `AnimationPlayer::play_with_transition()` method has been removed
and replaced with the `AnimationTransitions` component. If you were
previously using `AnimationPlayer::play_with_transition()`, add all
animations that you were playing to the `AnimationGraph`, and create an
`AnimationTransitions` component to manage the blending between them.

[RFC 51]:
https://github.com/bevyengine/rfcs/blob/main/rfcs/51-animation-composition.md

---------

Co-authored-by: Rob Parrett <robparrett@gmail.com>
2024-03-07 20:22:42 +00:00
..
android-res/mipmap-mdpi android example polish (#845) 2020-11-11 16:31:16 -08:00
animation_graphs Implement the AnimationGraph, allowing for multiple animations to be blended together. (#11989) 2024-03-07 20:22:42 +00:00
branding Remove unused namespace declarations (#10965) 2023-12-13 22:29:16 +00:00
data Added Support for Extension-less Assets (#10153) 2024-01-31 14:58:08 +00:00
docs Improve Mesh documentation (#9061) 2023-07-31 18:55:42 +00:00
environment_maps Implement minimal reflection probes (fixed macOS, iOS, and Android). (#11366) 2024-01-19 07:33:52 +00:00
fonts Add the license for the FiraMono font (#3589) 2022-05-06 19:29:43 +00:00
irradiance_volumes Implement irradiance volumes. (#10268) 2024-02-06 23:23:20 +00:00
lightmaps Implement lightmaps. (#10231) 2024-01-02 20:38:47 +00:00
models Implement irradiance volumes. (#10268) 2024-02-06 23:23:20 +00:00
pixel Add example for pixel-perfect grid snapping in 2D (#8112) 2023-12-26 17:15:50 +00:00
scenes Fix scene example (#11289) 2024-01-22 15:14:41 +00:00
shaders compute shader game of life example: use R32Float instead of Rgba8Unorm (#12155) 2024-02-27 13:57:41 +00:00
sounds Add simple collision sound to breakout (#4331) 2022-04-14 20:20:38 +00:00
textures Slicing support for texture atlas (#12059) 2024-03-05 16:05:39 +00:00