canvas animation using requestAnimationFrame
- Initialize 2d canvas and animate using requestAnimationFrame.
- Create a gameloop that emits update and draw events.
- Emit pause and resume events.
- node.js
- browserify / beefy
Try it out on requirebin: http:https://requirebin.com/?gist=5952933
npm install -g browserify beefy
<!DOCTYPE html>
<html>
<head>
<title>crtrdg gameloop test</title>
</head>
<body>
<canvas id="game"></canvas>
<script src="./bundle.js"></script>
</body>
</html>
var Game = require('crtrdg-gameloop');
// initialize the game with the canvas id of your game
// the width, height, and default background color of the canvas
var game = new Game({
canvasId: 'game',
width: '800',
height: '400',
backgroundColor: '#ff1f1f'
});
// every time through the loop, the `update` event will be emitted,
// interval is the amount of time between each loop
// listen for the `update` event like this:
game.on('update', function(interval){
console.log('update', interval);
});
// every time through the loop, the `draw` event will be emitted.
// context is the canvas context, and you can use it to draw on the canvas like usual.
// listen for the `draw` event like this:
game.on('draw', function(context){
console.log('draw', context);
context.fillStyle = '#fff';
context.fillRect(10, 10, 10, 10);
});
// if game.pause() is called somewhere in your code,
// a `pause` event will be emitted
// listen for it like this:
game.on('pause', function(){
console.log('paused');
});
// if game.resume() is called somewhere in your code,
// a `resume` event will be emitted
// listen for it like this:
game.on('resume', function(){
console.log('resumed');
});
Almost every javascript game / animation library I've found bundles things like requestAnimationFrame polyfill, gameloop, entities, abstract drawing methods, keyboard/mouse input, vector math, and more into one entangled library. If I don't like how the library handles just one of those
With inspiration from voxel.js, crtrdg is a collection of javascript modules used for developing 2d games.
As I learned more about node.js, the core events module, and browserify, I realized the ideal api for making simple 2d games could be based on node's events module.
- Fork this repository.
- Create a branch for you changes.
- Include tests if applicable.
- Add/edit documentation for any changes.
- Submit a pull request.
MIT