Zustand Entities

Use Zustand as a simple state store for entity management.

Technique

Store entities in a Zustand store array. Systems read from the store directly (non-reactively) in useFrame, while React components subscribe to the store for re-rendering when entities are added or removed.

Key Concepts

• Not a true ECS, but simple and effective for many cases
• Store entities in an array with create()
• Use getState() in systems for non-reactive access (no re-renders)
• Use useStore(selector) in components for reactive updates
• Memoize entity components to prevent unnecessary re-renders
• Re-renders happen when entities are added/removed from the array

Usage