const deadzone = (number, treshold) => {
    let percentage = (Math.abs(number) - treshold) / (1 - treshold);
    if(percentage < 0) percentage = 0;
    return percentage * (number > 0 ? 1 : -1);
  };

  const gameloop = () => {
    let gamepad = navigator.getGamepads()[0];
    if(gamepad){
      let joystickX = deadzone(gamepad.axes[0], 0.25);
      if(Math.abs(joystickX) > 0) {
        moveLeft = true;
      } else {
        moveLeft = false;
      }
    }
    window.requestAnimationFrame(gameloop);
  };

fallback.load({
  THREE: [
    '//cdnjs.cloudflare.com/ajax/libs/three.js/r73/three.min.js',
    'public/js/vendor/three.min.js'
  ]
});