Pen Settings

HTML

About HTML Preprocessors

HTML preprocessors can make writing HTML more powerful or convenient. For instance, Markdown is designed to be easier to write and read for text documents and you could write a loop in Pug.

Learn more · Versions

Adding Classes

In CodePen, whatever you write in the HTML editor is what goes within the <body> tags in a basic HTML5 template. So you don't have access to higher-up elements like the <html> tag. If you want to add classes there that can affect the whole document, this is the place to do it.

About the <head>

In CodePen, whatever you write in the HTML editor is what goes within the <body> tags in a basic HTML5 template. If you need things in the <head> of the document, put that code here.

!
Insecure Resource

The resource you are linking to is using the 'http' protocol, which may not work when the browser is using https.

CSS

About CSS Preprocessors

CSS preprocessors help make authoring CSS easier. All of them offer things like variables and mixins to provide convenient abstractions.

Learn more · Versions

CSS Base

About CSS Base

It's a common practice to apply CSS to a page that styles elements such that they are consistent across all browsers. We offer two of the most popular choices: normalize.css and a reset. Or, choose Neither and nothing will be applied.

Vendor Prefixing

About Vendor Prefixing

To get the best cross-browser support, it is a common practice to apply vendor prefixes to CSS properties and values that require them to work. For instance -webkit- or -moz-.

We offer two popular choices: Autoprefixer (which processes your CSS server-side) and -prefix-free (which applies prefixes via a script, client-side).

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.

Powered by Algolia
About External Resources

You can apply CSS to your Pen from any stylesheet on the web. Just put a URL to it here and we'll apply it, in the order you have them, before the CSS in the Pen itself.

If the stylesheet you link to has the file extension of a preprocessor, we'll attempt to process it before applying.

You can also link to another Pen here, and we'll pull the CSS from that Pen and include it. If it's using a matching preprocessor, we'll combine the code before preprocessing, so you can use the linked Pen as a true dependency.

Learn more

+ add another resource

JavaScript

About JavaScript Preprocessors

JavaScript preprocessors can help make authoring JavaScript easier and more convenient. For instance, CoffeeScript can help prevent easy-to-make mistakes and offer a cleaner syntax and Babel can bring ECMAScript 6 features to browsers that only support ECMAScript 5.

Learn more · Versions

Babel is required to process package imports. If you need a different preprocessor remove all packages first.

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.

Powered by Algolia
About External Resources

You can apply a script from anywhere on the web to your Pen. Just put a URL to it here and we'll add it, in the order you have them, before the JavaScript in the Pen itself.

If the script you link to has the file extension of a preprocessor, we'll attempt to process it before applying.

You can also link to another Pen here, and we'll pull the JavaScript from that Pen and include it. If it's using a matching preprocessor, we'll combine the code before preprocessing, so you can use the linked Pen as a true dependency.

Learn more

+ add another resource

Behavior

Save Automatically?

If active, Pens will autosave every 30 seconds after being saved once.

Auto-Updating Preview

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

Format on Save

If enabled, your code will be formatted when you actively save your Pen. Note: your code becomes un-folded during formatting.

Editor Settings

Code Indentation

Want to change your Syntax Highlighting theme, Fonts and more?

Visit your global Editor Settings.

HTML 

              
                <!-- 来自 learning three.js -->
<script src="https://unpkg.com/three@0.111.0/build/three.js"></script>
<script src="https://unpkg.com/stats.js"></script>
<script src="https://cdn.bootcss.com/dat-gui/0.6.5/dat.gui.min.js"></script>

</div>
<!-- Div which will hold the Output -->
<div id="webgl">
</div>
!

CSS 

              
                * {
  margin: 0;
  padding: 0;
}

body {
  overflow: hidden;
}
!

JS 

              
                function init() {
        // 创建一个场景
        var scene = new THREE.Scene();

        // 创建一个摄像机，它定义了我们的观察位置
        var camera = new THREE.PerspectiveCamera(35, window.innerWidth / window.innerHeight, 0.1, 1000);
        camera.position.x = 300;
        camera.position.y = 200;
        camera.position.z = 100;

        // 创建一个渲染器并设置其大小
        var renderer = new THREE.WebGLRenderer();

        renderer.setClearColor(0xffffff);
        renderer.setSize(window.innerWidth, window.innerHeight);
  
        var cubeGeometry = new THREE.CubeGeometry(30,30,30);
        var sphereGeometry = new THREE.SphereGeometry(20, 100, 100);
  
        const mixers = [];
        const clock = new THREE.Clock();
        // 线框
        var cubeWireMaterial = new THREE.MeshBasicMaterial({ wireframe: true, color: 0x666666 });
        var cubeMeshWire = new THREE.Mesh(cubeGeometry, cubeWireMaterial);
        cubeMeshWire.position.set(0, 0, 0);
        scene.add(cubeMeshWire);
  
        // 上下移动动画
        const mixer = new THREE.AnimationMixer(cubeMeshWire);
        const action = mixer.clipAction(getClip());
        action.timeScale = 1;
        action.loop = THREE.LoopPingPong;
        action.play();
        mixers.push(mixer);
  
  
        // 创建一个平行光并设置其位置
        var directionalLight = new THREE.DirectionalLight(0xffffff, 0.7);
        directionalLight.position.set(-20, 40, 60);
        scene.add(directionalLight);

        // 增加一个环境光，提亮整个场景
        var ambientLight = new THREE.AmbientLight(0x292929);
        scene.add(ambientLight);

        // 将渲染器的输入（canvas）插入到特定 DOM 元素下
        document.getElementById("webgl").appendChild(renderer.domElement);

 
        // 确保摄像机第一时刻是看向场景中心（0,0,0）
        camera.lookAt(scene.position);
        render();
  
        function getClip() {
          const times = [0, 1]; // 关键帧时间数组，离散的时间点序列
          const values = [0, 0, 0, 0, 10, 0]; // 与时间点对应的值组成的数组
          // 创建位置关键帧对象：0时刻对应位置0, 0, 0   10时刻对应位置150, 0, 0
          const posTrack = new THREE.VectorKeyframeTrack('stone.position', times, values);
          const duration = 1;
          return new THREE.AnimationClip('stonePosClip', duration, [posTrack]);
        }

        function render() {
            const delta = clock.getDelta();
            mixers.forEach((mixer) => mixer.update(delta))
            // render using requestAnimationFrame
            requestAnimationFrame(render);
            renderer.render(scene, camera);
        }
    }
    window.onload = init
!
999px

Console