눈누난나

{
window.addEventListener('load', init, false);

  function init() {
      createWorld();
      createLights();
      //createGrid();
      createPrimitive();
      createParticleWord();
      animation();
  }

  var scene, camera, renderer, container;
  var world = new THREE.Object3D();
  var _width, _height;

  function createWorld() {
      _width = window.innerWidth;
      _height = window.innerHeight;

      scene = new THREE.Scene();
      scene.fog = new THREE.Fog(0x000000, 4, 12);

      camera = new THREE.PerspectiveCamera(35, _width / _height, 1, 1000);
      camera.position.set(0, 0, 8);

      renderer = new THREE.WebGLRenderer({
          antialias: true,
          alpha: false
      });
      renderer.setSize(_width, _height);
      renderer.shadowMap.enabled = true;
      document.body.appendChild(renderer.domElement);
      window.addEventListener('resize', onWindowResize, false);
  }

  function onWindowResize() {
      _width = window.innerWidth;
      _height = window.innerHeight;
      renderer.setSize(_width, _height);
      camera.aspect = _width / _height;
      camera.updateProjectionMatrix();
      console.log('- resize -');
  }

  var _ambientLights, _lights;
  function createLights() {
      _ambientLights = new THREE.AmbientLight(0xFFFFFF, 1);
      _ambientLights = new THREE.HemisphereLight(0x111111, 0x000000, 5);
      _lights = new THREE.PointLight(0xF00555, 0.5);
      _lights.position.set(0, 0, 3);
      _lights.castShadow = true;
      scene.add(_ambientLights);
      scene.add(_lights);
  }

  var createParticleWord = function () {
      var geometry = new THREE.IcosahedronGeometry(0.7, 3);
      var circle_start = 10;

      for (var i = 0; i < 120; i++) {
          var material = new THREE.MeshBasicMaterial({
              color: 0xFFFF,
              color: 0xF00000,
              wireframe:false
          });
          var circle = new THREE.Mesh(geometry, material);
          circle.castShadow = true;
          circle.receivedShadow = true;

          circle.position.x = -Math.random() * circle_start + Math.random() * circle_start;
          circle.position.z = -Math.random() * circle_start + Math.random() * circle_start;
          circle.position.y = -Math.random() * circle_start + Math.random() * circle_start;
          var circle_scale = Math.random() * 1;
          var circle_random = Math.random() * 1;
          circle.scale.set(circle_scale, circle_scale, circle_scale);

          var object_pos = world.children[0];
          var object_pos_range = 0;
          setInterval(function () {
              object_pos.position.x = -Math.random() * object_pos_range + Math.random() *
                  object_pos_range;
              object_pos.position.y = -Math.random() * object_pos_range + Math.random() *
                  object_pos_range;
              object_pos.position.z = -Math.random() * object_pos_range + Math.random() *
                  object_pos_range;
          }, 1000);
          world.add(circle);
      }
      scene.add(world);
  }

  var primitiveElement = function () {
      this.mesh = new THREE.Object3D();
      var geo = new THREE.IcosahedronGeometry();
      var mat = new THREE.MeshBasicMaterial({
          color: 0x500000,
          flatShading: false
      });
      var mesh = new THREE.Mesh(geo, mat);
  }
  var _primitive;

  function createPrimitive() {
      _primitive = new primitiveElement();
      _primitive.mesh.scale.set(1, 1, 1);
      scene.add(_primitive.mesh);
  }

  function createGrid() {
      var gridHelper = new THREE.GridHelper(20, 20);
      gridHelper.position.y = -1;
      scene.add(gridHelper);
  }

  var distx, momentumx, momentumy, momentumz;

  function animation() {
      var time = Date.now() * 0.003;
      _primitive.mesh.rotation.y += 0.003;
      world.rotation.y = Math.sin(time) * Math.PI / 180;
      world.rotation.z = Math.cos(time) * Math.PI / 180;
      var object_place = world.children[0];
      object_place.visible = false;

      for (let i = 0, l = world.children.length; i < l; i++) {
          var object = world.children[i];
          var object_left = world.children[i - 1];
          if (i > 1) {
              TweenMax.to(object.position, 2, {
                  x: Math.cos(object_left.position.x * Math.PI) * 1,
                  y: Math.sin(object_left.position.y * Math.PI) * 1,
                  z: Math.cos(object_left.position.z * Math.PI) * 1,
              });
          }
      }

      var object_speed = 0.6;
      var object_guide = world.children[1];
      object_guide.position.x += Math.sin(object_place.position.x) - object_guide.position.x * object_speed;
      object_guide.position.y += Math.cos(object_place.position.y) - object_guide.position.y * object_speed;
      object_guide.position.z += object_place.position.z - object_guide.position.z * object_speed;

      camera.lookAt(scene.position);
      requestAnimationFrame(animation);
      renderer.render(scene, camera);
  }
}