rolling_ginkosan.js

var fs = require('fs');
var Canvas = require('canvas');
var GIFEncoder = require('gifencoder');

var w = 142;
var h = 179;

var cvs = new Canvas(w, h);
var ctx = cvs.getContext('2d');

var ginkosan = new Canvas.Image();

ginkosan.src = fs.readFileSync('./ginkosan.png');

var encoder = new GIFEncoder(w, h);

encoder.start();
encoder.setRepeat(0);
encoder.setDelay(5);

ctx.fillStyle = 'white';

for(var i = 0; i < 360; i += 10){

	ctx.fillRect(0, 0, w, h);

	ctx.translate(w / 2, h / 2);
	ctx.rotate(i / 180 * Math.PI);
	ctx.translate(-w / 2, -h / 2);
	
	ctx.drawImage(ginkosan, 0, 0);

	encoder.addFrame(ctx);

}

encoder.finish();

fs.writeFileSync('./anime.gif', encoder.out.getData());