rocket.js
A component-entity system with a library of game utilities makes building data-driven games a snap! Game logic is decomposed into simple systems each responsible for one moving piece. Adding or swapping features is a breeze.
Rocket = require 'rocket-engine'
rocket = new Rocket
# 1. define components as functions that assign values...
rocket.component 'position', (cmp, options) ->
cmp = {x: options.x ? 0, y: options.y ? 0}
# ...or as default value objects
rocket.component 'velocity', {x: 0, y: 0}
# 2. define systems that operate on keys with specific components
rocket.systemForEach 'move',
# required components for a key
['position', 'velocity'],
# function to call for each key that has all components
(rocket, key, position, velocity) ->
position.x += velocity.x
position.y += velocity.y
# 3. add keys that contain components
rocket.key {
spaceship : null # label, for filtering
velocity : null # use default component values
position : {x: WIDTH / 2, y: HEIGHT / 2}
}