Bevy Ecs Expert

Bevy ECS Expert

Overview

A guide to building high-performance game logic using Bevy's data-oriented ECS architecture. Learn how to structure systems, optimize queries, manage resources, and leverage parallel execution.

When to Use This Skill

• Use when developing games with the Bevy engine in Rust.
• Use when designing game systems that need to run in parallel.
• Use when optimizing game performance by minimizing cache misses.
• Use when refactoring object-oriented logic into data-oriented ECS patterns.

Step-by-Step Guide

1. Defining Components

Use simple structs for data. Import bevy::prelude::*; add Reflect only when reflection/inspection is needed. The snippets are alternatives and do not duplicate Player/Velocity definitions in one scope.

#[derive(Component, Reflect, Default)]
#[reflect(Component)]
struct Velocity {
    x: f32,
    y: f32,
}

#[derive(Component)]
struct Player;

2. Writing Systems

Systems are regular Rust functions that query components.