jecs/README.md

Jecs - Just a Stupidly Fast ECS

A high-performance Entity Component System (ECS) for Roblox games, supporting both Luau and TypeScript.

Features

• Blazing Fast: Iterate over hundreds of thousands of entities at 60 frames per second. Benchmark results are available in the documentation.
• Entity Relationships: First-class support for defining and querying relationships between entities.
• Type Safety: Fully typed API for both Luau and TypeScript, enhancing code maintainability and reducing errors.
• Zero Dependencies: No external dependencies required, simplifying integration into your project.
• Optimized Storage: Cache-friendly archetype/SoA (Structure of Arrays) storage for optimal performance.
• Battle-tested: Rigorously unit tested for stability and reliability.
• Comprehensive Documentation: Detailed documentation guides you through installation, usage, and advanced concepts.

Documentation

• Getting Started
• API Reference (Note: This link may need updating to reflect the actual location of the API docs if they are generated separately)
• Concepts
  • Entities and Components
  • Queries
  • Relationships
  • Component Traits
  • Addons
• Examples
• FAQ
• Contributing

Quick Example (Luau)

local world = jecs.World.new()
local Position = world:component() :: jecs.Entity<Vector3>
local Velocity = world:component() :: jecs.Entity<Vector3>

local entity = world:entity()
world:set(entity, Position, Vector3.new(0, 0, 0))
world:set(entity, Velocity, Vector3.new(1, 0, 0))

-- Update system (example)
for id, position, velocity in world:query(Position, Velocity) do
    world:set(id, Position, position + velocity)
end

Quick Example (TypeScript)

import { World } from "@rbxts/jecs";

const world = new World();
const Position = world.component<Vector3>();
const Velocity = world.component<Vector3>();

const entity = world.entity();
world.set(entity, Position, new Vector3(0, 0, 0));
world.set(entity, Velocity, new Vector3(1, 0, 0));

// Update system (example)
for (const [id, position, velocity] of world.query(Position, Velocity)) {
    world.set(id, Position, position.add(velocity));
}

Performance

Benchmark results demonstrating Jecs' performance are available in the documentation. These include query and insertion performance tests.

Installation

Using Wally (Luau)

Add Jecs to your wally.toml:

[dependencies]
jecs = "ukendio/jecs@0.2.3"

Then run:

wally install

Using npm (Roblox-ts)

npm install @rbxts/jecs

Standalone Installation

1. Download jecs.rbxm from the releases page.
2. Import it into your Roblox project.

Contributing

We welcome contributions! Please see our contribution guidelines for details.

Community & Support

• Discord Community
• GitHub Issues
• API Documentation (Note: This link may need updating)

License

Jecs is MIT licensed.