[][bevy]

[Bevy][bevy] is a refreshingly simple data-driven game engine built in Rust.

It is [free and open source][bevy-repo] forever!

This month, thanks to 87 contributors, 174 pull requests, and their

[generous sponsors][bevy-sponsors], Bevy 0.2 was released. You can view the

[full Bevy 0.2 announcement here][bevy-0-2]. Here are some highlights:

- Async Task System: Bevy now has a brand new async-friendly task system,

which enables the creation of context-specific task pools. For example, you might

have separate pools for compute, IO, networking, etc. This also provides the

flexibility to load balance work appropriately according to work type and/or priority.

This new task system completely replaces Rayon and the cpu usage wins were huge!

- Initial Web Platform Support: (A subset of) Bevy now runs on the web using

WebAssembly/WASM! Specifically, Bevy apps can run Bevy ECS schedules, react to

input events, create an empty canvas (using winit), and a few other things. This

is a huge first step, but it is important to call out that there are still a

number of missing pieces, such as 2D/3D rendering, multi-threading, and sound.

- Parallel Queries: Systems that use queries already run in parallel,

but before this change the queries themselves could not be iterated in parallel.

Bevy 0.2 adds the ability to easily iterate queries in parallel, which builds on

top of the new Async Task System.

- Transform System Rewrite: Bevy's old transform system used separate

`Translation`, `Rotation`, and `Scale` components as the "source of truth",

which were then synced to a `LocalTransform` component after each update. There

are Good Reasons™ to use this approach, but it created a "lag" between the

calculated LocalTransform and the source components and dataflow between components

is hard to reason about. This problem was resolved by making a newer, simpler

transform system that uses a consolidated `Transform` type.

- Joystick/Gamepad Input: The Bevy Input plugin now has cross-platform support

for most controllers thanks to the gilrs library!

- Bevy ECS Performance Improvements: generational entity IDs,

read-only queries, lock-free world APIs, direct component lookup.

Community plugin updates:

- [bevy_rapier](https://github.com/dimforge/bevy_rapier):

Rapier Physics' official Bevy plugin was updated to support Bevy 0.2.

- [bevy_ninepatch](https://crates.io/crates/bevy_ninepatch):

Display 9-Patch UI elements, where you can specify how

different parts of a PNG should grow.

- [bevy_mod_picking](https://github.com/aevyrie/bevy_mod_picking): 3d cursor

picking and highlighting.

- [bevy_contrib_colors](https://crates.io/crates/bevy_contrib_colors):

A simple color library.

- [bevy_input_map](https://crates.io/crates/bevy_prototype_input_map):

Converts user inputs from different input hardware into game specific actions.

Ex: keyboard "Space" or joystick "A" can be mapped to a "Jump" Action.

- [bevy_prototype_lyon](https://github.com/Nilirad/bevy_prototype_lyon):

Draw 2D shapes, like triangles, circles, and beziers.

- [bevy_contrib_inspector](https://github.com/jakobhellermann/bevy-contrib-inspector):

Visually edit fields of your bevy resources in a browser or native view.

_Discussions:

[/r/rust](https://reddit.com/r/rust/comments/iw1yyp/bevy_02),

[hacker news](https://news.ycombinator.com/item?id=24530698),

[twitter](https://twitter.com/cart_cart/status/1307445918535315456)_

[bevy]: https://bevyengine.org

[bevy-repo]: https://github.com/bevyengine/bevy

[bevy-0-2]: https://bevyengine.org/news/bevy-0-2

[bevy-sponsors]: https://github.com/sponsors/cart