Bevy - A data-driven game engine built in Rust

A refreshingly simple data-driven game engine built in Rust
Free and Open Source Forever!

Data Driven

All engine and game logic uses Bevy ECS, a custom Entity Component System

Fast: Massively Parallel and Cache-Friendly. The fastest ECS according to some benchmarks
Simple: Components are Rust structs, Systems are Rust functions
Capable: Queries, Global Resources, Local Resources, Change Detection, Lock-Free Parallel Scheduler

2D Renderer

Render real-time 2D graphics for games and apps

Features: sprite sheets, dynamic texture atlases, cameras, textures, and materials
Extensible: custom shaders, materials, and render pipelines
Common Core: builds on top of Bevy's Render Graph

3D Renderer

A modern and flexible 3D renderer

Features: lights, shadows, cameras, meshes, textures, materials, gltf loading
Extensible: custom shaders, materials, and render pipelines
Common Core: built on top of Bevy's Render Graph

Render Graph

Compose custom render pipelines using a graph structure

Parallel: Render Graphs are automatically rendered in parallel
Modular: Build composable and reusable render logic using Render Graph nodes
Backend Agnostic: Not tied to a specific graphics api

Cross Platform

Support for all major platforms:

Windows, MacOS, Linux, Web

With more on the way:

Android, iOS

Bevy UI

A custom ECS-driven UI framework built specifically for Bevy

Built directly on top of Bevy's ECS, Renderer, and Scene plugins
Compose UIs dynamically in code or declaratively using the Bevy Scene format
Use a familiar "flex box" model to layout your UIs

Scenes

Create, save, and load ECS worlds using Bevy's Scene system

Loading: Loading scenes preserves entity IDs (useful for save games)
Instancing: Instancing creates linked duplicates of scenes with new entity IDs
Hot Reloading: Changes to scene files are automatically applied to running apps

2D scene of a square upon grass under the sun

Sound

Load audio files and play them on demand

Load audio files as Assets
Play audio Assets using the Audio resource

Hot Reloading

Get instant feedback on your changes without app restarts or recompiles

Asset changes are immediately reflected in running Bevy apps
You can currently hot-reload scenes, textures, and meshes
Any asset type can be integrated

Productive Compile Times

Game development is an iterative process. You can't afford to wait for compiles

With Bevy you can expect 0.8-3.0 seconds with the "fast compiles" configuration
Compare that to other popular Rust game engines, which can take over 30 seconds to compile a single newline insertion!

Free and Open Source

An engine made by and for the developer community

100% free. Forever and always
Open Source under the permissive MIT or Apache 2.0 licenses
No contracts
No license fees
No sales cuts

Ready to start building Bevy apps? Get started fast with The Bevy Book!