Bevy vs Cocos2d-x

Bevy is a free, open-source game engine built in Rust for 2D and 3D games, visualizations, interfaces, and other graphical applications. It uses a custom Entity Component System, with components represented as Rust structs and systems as Rust functions. The engine includes 2D and 3D rendering, a composable render graph, skeletal and morph-target animation, scene loading, hot reloading, UI, and audio playback. Its 2D renderer supports sprites, texture atlases, cameras, materials, custom shaders, and render pipelines. The 3D renderer includes lights, shadows, meshes, materials, cameras, and glTF loading. The ECS-driven UI framework uses flex-box layout and can be composed in code or scenes. Scene changes can update running applications; hot reloading currently covers scenes, textures, and meshes. Bevy targets Windows, macOS, Linux, web, iOS, and Android, and is available through crates.io with cargo add bevy. Users choose MIT or Apache 2.0 licensing, with no license fees or sales cuts. It remains in development, with possible missing features, sparse documentation, and breaking API changes about every three months.

Cocos2d-x is a free, open-source C++ framework for building games, apps, and other interactive GUI programs. Developers can publish from one codebase to mobile, desktop, web, and console targets, using C++ or JavaScript and Lua bindings. The product page lists OpenGL ES 2.0 and Metal for graphics rendering and says Lua or JavaScript can be used for game hot updates. Its maker describes the C++ core as lightweight and optimized for devices including low-end Android systems. The community maintains the framework under the MIT license. The download page says version 4.0 uses CMake for all platforms, supports Metal on iOS and macOS, and removes the H5 engine and JSB. The product page lists version 3.17 support for iOS 8.0 and later, Android 3.0 and later, Windows 7/8.1/10, macOS 10.9 and later, and standard HTML5 browsers. Developer resources include documentation, tutorials, demos, an API reference, and forums.