code: function init() {
      /**
     * Rendering loop
     */
      function animate() {
          // render
          controls.update();
  
          if (ready) {
              renderer.render(scene, camera);
          }
  
          stats.update();
  
          // request new frame
          requestAnimationFrame(function() {
              animate();
          });
      }
  
      // renderer
      threeD = document.getElementById('r3d');
      renderer = new THREE.WebGLRenderer({
          alpha: true
      });
      renderer.setSize(threeD.offsetWidth, threeD.offsetHeight);
      threeD.appendChild(renderer.domElement);
  
      // stats
      stats = new Stats();
      threeD.appendChild(stats.domElement);
  
      // scene
      scene = new THREE.Scene();
  
      // camera
      camera = new THREE.PerspectiveCamera(45, threeD.offsetWidth / threeD.offsetHeight, 0.1, 100000);
      camera.position.x = 150;
      camera.position.y = 400;
      camera.position.z = -350;
      camera.up.set(-0.42, 0.86, 0.26);
  
      // controls
      controls = new AMI.TrackballControl(camera, threeD);
      controls.rotateSpeed = 5.5;
      controls.zoomSpeed = 1.2;
      controls.panSpeed = 0.8;
      controls.staticMoving = true;
      controls.dynamicDampingFactor = 0.3;
  
      threeD.addEventListener('mousedown', onMouseDown, false);
      threeD.addEventListener('mouseup', onMouseUp, false);
      window.addEventListener('resize', onWindowResize, false);
  
      // start rendering loop
      animate();
  }
docs: Init the scene