mirror of
https://github.com/bevyengine/bevy
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142 lines
8.5 KiB
Markdown
142 lines
8.5 KiB
Markdown
# [](https://bevyengine.org)
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[](https://crates.io/crates/bevy)
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[](https://github.com/bevyengine/bevy#license)
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[](https://crates.io/crates/bevy)
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[](https://github.com/bevyengine/bevy/actions)
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[](https://discord.gg/bevy)
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## What is Bevy?
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Bevy is a refreshingly simple data-driven game engine built in Rust. It is free and open-source forever!
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## WARNING
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Bevy is still in the early stages of development. Important features are missing. Documentation is sparse. A new version of Bevy containing breaking changes to the API is released [approximately once every 3 months](https://bevyengine.org/news/bevy-0-6/#the-train-release-schedule). We provide [migration guides](https://bevyengine.org/learn/book/migration-guides/), but we can't guarantee migrations will always be easy. Use only if you are willing to work in this environment.
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**MSRV:** Bevy relies heavily on improvements in the Rust language and compiler.
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As a result, the Minimum Supported Rust Version (MSRV) is generally close to "the latest stable release" of Rust.
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## Design Goals
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* **Capable**: Offer a complete 2D and 3D feature set
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* **Simple**: Easy for newbies to pick up, but infinitely flexible for power users
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* **Data Focused**: Data-oriented architecture using the Entity Component System paradigm
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* **Modular**: Use only what you need. Replace what you don't like
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* **Fast**: App logic should run quickly, and when possible, in parallel
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* **Productive**: Changes should compile quickly ... waiting isn't fun
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## About
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* **[Features](https://bevyengine.org):** A quick overview of Bevy's features.
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* **[News](https://bevyengine.org/news/)**: A development blog that covers our progress, plans and shiny new features.
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## Docs
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* **[The Bevy Book](https://bevyengine.org/learn/book/introduction):** Bevy's official documentation. The best place to start learning Bevy.
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* **[Bevy Rust API Docs](https://docs.rs/bevy):** Bevy's Rust API docs, which are automatically generated from the doc comments in this repo.
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* **[Official Examples](https://github.com/bevyengine/bevy/tree/latest/examples):** Bevy's dedicated, runnable examples, which are great for digging into specific concepts.
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* **[Community-Made Learning Resources](https://bevyengine.org/assets/#learning)**: More tutorials, documentation, and examples made by the Bevy community.
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## Community
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Before contributing or participating in discussions with the community, you should familiarize yourself with our [**Code of Conduct**](./CODE_OF_CONDUCT.md).
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* **[Discord](https://discord.gg/bevy):** Bevy's official discord server.
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* **[Reddit](https://reddit.com/r/bevy):** Bevy's official subreddit.
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* **[GitHub Discussions](https://github.com/bevyengine/bevy/discussions):** The best place for questions about Bevy, answered right here!
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* **[Bevy Assets](https://bevyengine.org/assets/):** A collection of awesome Bevy projects, tools, plugins and learning materials.
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If you'd like to help build Bevy, check out the **[Contributor's Guide](https://github.com/bevyengine/bevy/blob/main/CONTRIBUTING.md)**.
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For simple problems, feel free to open an issue or PR and tackle it yourself!
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For more complex architecture decisions and experimental mad science, please open an [RFC](https://github.com/bevyengine/rfcs) (Request For Comments) so we can brainstorm together effectively!
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## Getting Started
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We recommend checking out [The Bevy Book](https://bevyengine.org/learn/book/introduction) for a full tutorial.
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Follow the [Setup guide](https://bevyengine.org/learn/book/getting-started/setup/) to ensure your development environment is set up correctly.
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Once set up, you can quickly try out the [examples](https://github.com/bevyengine/bevy/tree/latest/examples) by cloning this repo and running the following commands:
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```sh
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# Switch to the correct version (latest release, default is main development branch)
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git checkout latest
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# Runs the "breakout" example
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cargo run --example breakout
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```
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To draw a window with standard functionality enabled, use:
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```rust
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use bevy::prelude::*;
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fn main(){
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App::new()
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.add_plugins(DefaultPlugins)
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.run();
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}
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```
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### Fast Compiles
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Bevy can be built just fine using default configuration on stable Rust. However for really fast iterative compiles, you should enable the "fast compiles" setup by [following the instructions here](http://bevyengine.org/learn/book/getting-started/setup/).
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## Libraries Used
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Bevy is only possible because of the hard work put into these foundational technologies:
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* [wgpu](https://wgpu.rs/): modern / low-level / cross-platform graphics library inspired by Vulkan
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* [glam-rs](https://github.com/bitshifter/glam-rs): a simple and fast 3D math library for games and graphics
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* [winit](https://github.com/rust-windowing/winit): cross-platform window creation and management in Rust
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## [Bevy Cargo Features][cargo_features]
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This [list][cargo_features] outlines the different cargo features supported by Bevy. These allow you to customize the Bevy feature set for your use-case.
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[cargo_features]: docs/cargo_features.md
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## [Third Party Plugins][plugin_guidelines]
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Plugins are very welcome to extend Bevy's features. [Guidelines][plugin_guidelines] are available to help integration and usage.
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[plugin_guidelines]: docs/plugins_guidelines.md
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## Thanks and Alternatives
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Additionally, we would like to thank the [Amethyst](https://github.com/amethyst/amethyst), [macroquad](https://github.com/not-fl3/macroquad), [coffee](https://github.com/hecrj/coffee), [ggez](https://github.com/ggez/ggez), [Fyrox](https://github.com/FyroxEngine/Fyrox), and [Piston](https://github.com/PistonDevelopers/piston) projects for providing solid examples of game engine development in Rust. If you are looking for a Rust game engine, it is worth considering all of your options. Each engine has different design goals, and some will likely resonate with you more than others.
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<!-- This next line need to stay exactly as is. It is required for BrowserStack sponsorship. -->
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This project is tested with BrowserStack.
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## License
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Bevy is free, open source and permissively licensed!
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Except where noted (below and/or in individual files), all code in this repository is dual-licensed under either:
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* MIT License ([LICENSE-MIT](LICENSE-MIT) or [http://opensource.org/licenses/MIT](http://opensource.org/licenses/MIT))
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* Apache License, Version 2.0 ([LICENSE-APACHE](LICENSE-APACHE) or [http://www.apache.org/licenses/LICENSE-2.0](http://www.apache.org/licenses/LICENSE-2.0))
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at your option.
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This means you can select the license you prefer!
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This dual-licensing approach is the de-facto standard in the Rust ecosystem and there are [very good reasons](https://github.com/bevyengine/bevy/issues/2373) to include both.
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Some of the engine's code carries additional copyright notices and license terms due to their external origins.
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These are generally BSD-like, but exact details vary by crate:
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If the README of a crate contains a 'License' header (or similar), the additional copyright notices and license terms applicable to that crate will be listed.
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The above licensing requirement still applies to contributions to those crates, and sections of those crates will carry those license terms.
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The [license](https://doc.rust-lang.org/cargo/reference/manifest.html#the-license-and-license-file-fields) field of each crate will also reflect this.
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For example, [`bevy_mikktspace`](./crates/bevy_mikktspace/README.md#license-agreement) has code under the Zlib license (as well as a copyright notice when choosing the MIT license).
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The [assets](assets) included in this repository (for our [examples](./examples/README.md)) typically fall under different open licenses.
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These will not be included in your game (unless copied in by you), and they are not distributed in the published bevy crates.
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See [CREDITS.md](CREDITS.md) for the details of the licenses of those files.
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### Your contributions
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Unless you explicitly state otherwise,
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any contribution intentionally submitted for inclusion in the work by you,
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as defined in the Apache-2.0 license,
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shall be dual licensed as above,
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without any additional terms or conditions.
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