unity-ecs-patterns

# Unity ECS Patterns Production patterns for Unity's Data-Oriented Technology Stack (DOTS) including Entity Component System, Job System, and Burst Compiler. ## When to Use This Skill - Building high-performance Unity games - Managing thousands of entities efficiently - Implementing data-oriented game systems - Optimizing CPU-bound game logic - Converting OOP game code to ECS - Using Jobs and Burst for parallelization ## Core Concepts ### 1. ECS vs OOP | Aspect | Traditional OOP | ECS/DOTS | | ----------- | ----------------- | --------------- | | Data layout | Object-oriented | Data-oriented | | Memory | Scattered | Contiguous | | Processing | Per-object | Batched | | Scaling | Poor with count | Linear scaling | | Best for | Complex behaviors | Mass simulation | ### 2. DOTS Components ``` Entity: Lightweight ID (no data) Component: Pure data (no behavior) System: Logic that processes components World: Container for entities Archetype: Unique combination of components Chunk: Memory block for same-archetype entities ``` ## Patterns ### Pattern 1: Basic ECS Setup ```csharp using Unity.Entities; using Unity.Mathematics; using Unity.Transforms; using Unity.Burst; using Unity.Collections; // Component: Pure data, no methods public struct Speed : IComponentData { public float Value; } public struct Health : IComponentData { public float Current; public float Max; } public struct Target : ICompone...