/* based on https://github.com/jasonmayes/Particle-Engine/blob/master/js/exampleUsage.js */

var img = new Image();
img.src = 'http://digitalsun.pl/chopin.png';

jmParticleEngine.init('canvas', window.innerWidth, window.innerHeight);
jmParticleEngine.setPreDrawCallback(function (ctx) {
	ctx.globalAlpha = 1.0;
	ctx.drawImage(img, window.innerWidth/2 - 220, window.innerHeight - 300);
});

function particleGenerator() {
  var size = jmParticleEngine.randomNumber(128, -64, true);
  return jmParticleEngine.generateParticle(
      this.x ,
      this.y ,
      size,
      size,
      jmParticleEngine.randomNumber(Math.PI * 2, 0, false),
      jmParticleEngine.randomNumber(18, 9, false),
      jmParticleEngine.randomNumber(18, 9, false),
      50,
      0,
      0,
      0,
      0,
      0
  );
}

var chopinEmit = jmParticleEngine.generateEmitter(window.innerWidth/2,
    window.innerHeight - 120, 1000, particleGenerator);
chopinEmit.preloadImage('https://storage.googleapis.com/jm-cors/images/fire2.png');
jmParticleEngine.addEmitter(chopinEmit, true);
chopinEmit.start();