dow.innerHeight);
  renderer.autoClear = false;
  canvas = renderer.domElement;
  document.body.appendChild(canvas);
  scene = new THREE.Scene();

  // Creating the ARView, which is the object that handles
  // the rendering of the camera stream behind the three.js
  // scene
  arView = new THREE.ARView(vrDisplay, renderer);

  // The ARPerspectiveCamera is very similar to THREE.PerspectiveCamera,
  // except when using an AR-capable browser, the camera uses
  // the projection matrix provided from the devi