Rust Bevy Entity Component System

Bevy is a Rust-based game engine that utilizes an ergonomic Entity Component System (ECS) pattern, allowing developers to create game elements by combining entities and components. It features a user-friendly API where regular Rust functions can be added as systems, which Bevy dispatches based on their type signatures. The article delves into implementing the ECS pattern in Bevy by building a simplified Bevy-like API from scratch that can accept arbitrary system functions, highlighting its generic nature and applicability in other Rust projects. It also explores how the Axum web framework employs a similar pattern for route handler methods, allowing functions with parameters that implement certain traits to be used seamlessly. The discussion underscores the flexibility and extensibility of Rust's type system and traits in building scalable and efficient systems, both in game development and web frameworks like Axum.