crtrdg gameloop

canvas animation using requestAnimationFrame

Goals for the crtrdg gameloop:

• Initialize 2d canvas and animate using requestAnimationFrame.
• Create a gameloop that emits update and draw events.
• Emit pause and resume events.

Install

npm install crtrdg-gameloop

Other crtrdg modules:

• crtrdg-entity
• crtrdg-keyboard
• crtrdg-mouse

Contributing

• Fork this repository.
• Create a branch for you changes.
• Include tests if applicable.
• Add/edit documentation for any changes.
• Submit a pull request.

API

createGame

Create the game

Parameters

• options Object
  • options.canvas [Object] – id or dom node of canvas tag
  • options.fps [Number]

Examples

var createGame = require('crtrdg-gameloop')

var game = createGame({ canvas: 'game' })

game.draw

Draw to the canvas

Parameters

• renderer Object
• context
• delta Number – time elapsed since last update

game.end

End the game. Emits the end event/

Examples

game.end()

game.resume

Resume the game. Emits the resume event.

Examples

game.resume()

game.toggle

Pause or start game depending on game state. Emits either the pause or resume event.

Examples

game.toggle()

game.update

Update the game state. Emits the update event. You'll likely never call this method, but you may need to override it. Make sure to always emit the update event with the delta time.

Parameters

• delta Number – time elapsed since last update

Game#draw

Draw event.

Parameters

• renderer Object
• delta Number

Examples

game.on('draw', function (renderer, dt) {
  console.log(dt)
})

Game#end

End event. Fired when game.end() is called.

Examples

game.on('end', function () {})

Game#pause

Pause event. Fired when game.pause() is called.

Examples

game.on('pause', function () {})

Game#resume

Resume event. Fired when game.resume() is called.

Examples

game.on('resume', function () {})

Game#start

Start event. Fired when game.start() is called.

Examples

game.on('start', function () {})

Game#update

Update event.

Parameters

• delta Number

Examples

game.on('update', function (dt) {
  console.log(dt)
})

License

MIT