var raycast = raycast || {};

window.requestAnimFrame = (function(){
  return window.requestAnimationFrame       ||
  window.webkitRequestAnimationFrame ||
  window.mozRequestAnimationFrame    ||
  window.oRequestAnimationFrame      ||
  window.msRequestAnimationFrame     ||
  function(callback, element){
    window.setTimeout(callback, 1000 / 60);
  };
})();

function start() {
  document.onkeyup = raycast.keyhandler.onKeyup;
  document.onkeydown = raycast.keyhandler.onKeydown;
  var textureFiles = ["img/brick.png", "img/ground.png", "img/sky.png"];
  raycast.texture.initiateLoad(textureFiles, raycast.engine.start);
};

window.onload = start;