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Add External Stylesheets/Pens

Any URL's added here will be added as <link>s in order, and before the CSS in the editor. If you link to another Pen, it will include the CSS from that Pen. If the preprocessor matches, it will attempt to combine them before processing.

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Add External Scripts/Pens

Any URL's added here will be added as <script>s in order, and run before the JavaScript in the editor. You can use the URL of any other Pen and it will include the JavaScript from that Pen.

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Use npm Packages

We can make npm packages available for you to use in your JavaScript. We use webpack to prepare them and make them available to import. We'll also process your JavaScript with Babel.

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Code Indentation


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If enabled, the preview panel updates automatically as you code. If disabled, use the "Run" button to update.

HTML Settings

Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

              <script src=""></script>
<script src=""></script>
              * {
  margin: 0;
  padding: 0;

body {
  height: 100%;
  overflow: hidden;
              function init() {
      // 获取浏览器窗口的宽高,后续会用
      var width = window.innerWidth
      var height = window.innerHeight

      // 创建一个场景
      var scene = new THREE.Scene()

      // 创建一个具有透视效果的摄像机
      var camera = new THREE.PerspectiveCamera(45, width / height, 0.1, 800)

      // 设置摄像机位置,并将其朝向场景中心
      camera.position.x = 0
      camera.position.y = 10
      camera.position.z = 200

      // 创建一个 WebGL 渲染器,Three.js 还提供 <canvas>, <svg>, CSS3D 渲染器。
      var renderer = new THREE.WebGLRenderer({
        antialias: true

      // 设置渲染器的清除颜色(即绘制下一帧前填充的颜色)和输出的 canvas 的尺寸
      renderer.setSize(width, height)

      // 将渲染器的输出(此处是 canvas 元素)插入到 body
      // 初始化摄像机插件(用于拖拽旋转摄像机,产生交互效果)
      var orbitControls = new THREE.OrbitControls(camera)
      orbitControls.autoRotate = true

      var geometry = new THREE.Geometry()
      var material = new THREE.PointsMaterial({
        size: 4,
        vertexColors: true, // 是否为几何体的每个顶点应用颜色,默认值是为所有面应用材质的颜色
        color: 0xffffff

      for (var x = -5; x < 5; x++) {
        for (var y = -5; y < 5; y++) {
          var particle = new THREE.Vector3(x * 10, y * 10, 0)
          geometry.colors.push(new THREE.Color(Math.random() * 0xffffff))
      // 相较于 THREE.Sprite,THREE.Points 更适合粒子数量多的情况。
      var points = new THREE.Points(geometry, material)


      function render() {
        // 渲染,即摄像机拍下此刻的场景
        renderer.render(scene, camera)

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