Guide

This section explains the current architecture of Arepy from the outside in.

Recommended order

• Engine Lifecycle explains the frame loop and world switching
• Engine Services explains the shared tools you get with the engine
• ECS Basics explains entities, components, systems, and builders
• Queries explains filters and fast iteration APIs
• Resources and Systems explains dependency injection into systems
• Built-in Bundle summarizes the reusable components and systems shipped with the project
• Math Helpers covers the vector primitives used throughout the engine

Design themes you will see repeatedly

• components are data containers
• systems are plain callables grouped by pipeline
• queries are signed from type annotations
• resources are injected by type name at runtime
• examples favor small, direct system code