three.js(18)-综合案例(地月绕行)

今天我们来做一个综合案例,把前面的知识都串起来。

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <script src="http://www.yanhuangxueyuan.com/versions/threejsR92/build/three.js"></script>
    <script src="http://www.yanhuangxueyuan.com/threejs/examples/js/controls/OrbitControls.js"></script>
    <script src="http://www.yanhuangxueyuan.com/threejs/examples/js/renderers/CSS2DRenderer.js"></script>
    <title>Document</title>
    <style>
        body {
            background: url(https://gimg2.baidu.com/image_search/src=http%3A%2F%2Fpic1.win4000.com%2Fwallpaper%2F1%2F590c2682cc04c.jpg%3Fdown&refer=http%3A%2F%2Fpic1.win4000.com&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=jpeg?sec=1641349822&t=06301990af74d7bde9f5675864375620) no-repeat;
            background-size: cover;
        }

        .label {

            color: #ffffff;

            font-size: 16px;
        }
    </style>
</head>

<body>

</body>

</html>
<script>
    var scene, camera, renderer, labelRenderer;
    var earth, moon;
    let oldtime = 0;
    var clock = new THREE.Clock();

    const textureLoader = new THREE.TextureLoader();

    const EARCH_RADIUS = 2.6;
    const MOON_RADIUS = 0.3;


    init();
    ani();
    //初始化
    function init() {
        //场景初始化
        scene = new THREE.Scene();
        // var axes = new THREE.AxesHelper(50);//添加辅助坐标系
        // scene.add(axes);
        //光源初始化
        const light = new THREE.SpotLight(0xffffff);
        light.position.set(0, 0, 50);//沿着z轴打光

        scene.add(light);
        //物体初始化
        let earthUrl = 'https://gimg2.baidu.com/image_search/src=http%3A%2F%2Fgss0.baidu.com%2F9fo3dSag_xI4khGko9WTAnF6hhy%2Fzhidao%2Fpic%2Fitem%2Fb2de9c82d158ccbf966e26f710d8bc3eb0354129.jpg&refer=http%3A%2F%2Fgss0.baidu.com&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=jpeg?sec=1641350661&t=5fedb443fdc2307ec5fcf6ae7d328883';
        let moonUrl = 'https://img2.baidu.com/it/u=4210058006,2612068669&fm=26&fmt=auto';
        earth = sphereGeomery(earthUrl, EARCH_RADIUS, 16, 16);
        moon = sphereGeomery(moonUrl, MOON_RADIUS, 16, 16);

        createLabel(earth, '地球', EARCH_RADIUS);
        createLabel(moon, '月亮', MOON_RADIUS);
        
        scene.add(earth);
        scene.add(moon);
        //相机初始化
        camera = new THREE.PerspectiveCamera(45, window.innerWidth / window.innerHeight, 0.1, 500);
        camera.position.set(0, 0, 20);
        //渲染器初始化
        renderer = new THREE.WebGLRenderer({
            antialias: true,//消除锯齿
            alpha: true //透明
        });
        renderer.setSize(window.innerWidth, window.innerHeight);
        renderer.setPixelRatio(window.devicePixelRatio);
        document.body.appendChild(renderer.domElement);

        labelRenderer = new THREE.CSS2DRenderer();
        labelRenderer.setSize(window.innerWidth, window.innerHeight);

        labelRenderer.domElement.style.position = 'absolute';
        labelRenderer.domElement.style.top = '0px';

        document.body.appendChild(labelRenderer.domElement);
        //增加鼠标拾取效果
        var controls = new THREE.OrbitControls(camera, renderer.domElement);

    }
    //创建物体
    function sphereGeomery(textureUrl, radius, widthSegments, heightSegments) {
        let geometry = new THREE.SphereGeometry(radius, widthSegments, heightSegments);
        let material = new THREE.MeshPhongMaterial({
            map: textureLoader.load(textureUrl)
        });
        let mesh = new THREE.Mesh(geometry, material);
        return mesh;

    }
    //创建标签
    function createLabel(mesh, text, radius) {
        const div = document.createElement('div');
        div.className = 'label';
        div.textContent = text;
        const label = new THREE.CSS2DObject(div);//声明html元素
        label.position.set(0, radius + 0.5, 0);
        mesh.add(label);
    }
    //动画
    function ani() {
        const elapsed = clock.getElapsedTime();
        moon.position.set(Math.sin(elapsed) * 5, 0, Math.cos(elapsed) * 5);//月球绕行
        var axis = new THREE.Vector3(0, 1, 0);//Y向量
        earth.rotateOnAxis(axis, (elapsed - oldtime) * Math.PI / 10);//地球沿着Y轴自转

        renderer.render(scene, camera);
        labelRenderer.render(scene, camera);

        oldtime = elapsed;

        requestAnimationFrame(ani);

    }

</script>
earth.gif

结合这个效果,咱们可以轻松做个炫酷的登录页出来:

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <script src="http://www.yanhuangxueyuan.com/versions/threejsR92/build/three.js"></script>
    <script src="http://www.yanhuangxueyuan.com/threejs/examples/js/controls/OrbitControls.js"></script>
    <script src="http://www.yanhuangxueyuan.com/threejs/examples/js/renderers/CSS2DRenderer.js"></script>
    <title>Document</title>
    <style>
        body {
            background: url(https://gimg2.baidu.com/image_search/src=http%3A%2F%2Fpic1.win4000.com%2Fwallpaper%2F1%2F590c2682cc04c.jpg%3Fdown&refer=http%3A%2F%2Fpic1.win4000.com&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=jpeg?sec=1641349822&t=06301990af74d7bde9f5675864375620) no-repeat;
            background-size: cover;
            overflow: hidden;
        }

        .label {

            color: #ffffff;

            font-size: 16px;
        }
        input{
            box-sizing: border-box;
            margin: 0;
            padding: 0;
            position: relative;
            display: inline-block;
            width: 100%;
            min-width: 0;
            padding: 4px 11px;
            color: rgba(255, 255, 255, 0.85);
            font-size: 14px;
            line-height: 1.5715;
            background-color: transparent;
            background-image: none;
            border: 1px solid #165996;
            border-radius: 2px;
            transition: all 0.3s;
        }
        .login{
            display:flex;
            position:absolute;
            top:50%;
            left:50%;
            width:600px;
            height:500px;
            margin-left:-300px;
            margin-top:-250px;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            color:#fff;
            z-index:999;
            border:1px solid #ccc;
            border-radius: 8px;

            box-shadow: 2px  2px 3px #E5E5E5;

        }
        .row{
            display: flex;
            justify-content: center;
            align-items: center;
            margin:20px 0;
        }
        .sub{
            border: 0;
            width: 123px;
            height: 40px;
            background: linear-gradient(
        270deg, #40C4FF 0%, #2979FE 100%);
            border-radius: 20px;
            line-height: 21px;
            color: #FFFFFF;
            transition: all 0.1s ease;
            opacity: 1;
        }
    </style>
</head>

<body>

    <div class="login">
        <h1  class="row">用户登录</h1>
        <div class="row">
            用户名&nbsp;&nbsp;<input type="text"  style="width:300px;"/> 
        </div>
         <div class="row">
            密&nbsp;&nbsp;码&nbsp;&nbsp;<input type="text" style="width:300px;"/>
         </div>
         <div class="row">
             <button class="sub">登录</button>
         </div>
        
    </div>
</body>

</html>
<script>
    var scene, camera, renderer, labelRenderer;
    var earth, moon;
    let oldtime = 0;
    var clock = new THREE.Clock();

    const textureLoader = new THREE.TextureLoader();

    const EARCH_RADIUS = 2.6;
    const MOON_RADIUS = 0.3;


    init();
    ani();
    //初始化
    function init() {
        //场景初始化
        scene = new THREE.Scene();
        // var axes = new THREE.AxesHelper(50);//添加辅助坐标系
        // scene.add(axes);
        //光源初始化
        const light = new THREE.SpotLight(0xffffff);
        light.position.set(0, 0, 50);//沿着z轴打光

        scene.add(light);
        //物体初始化
        let earthUrl = 'https://gimg2.baidu.com/image_search/src=http%3A%2F%2Fgss0.baidu.com%2F9fo3dSag_xI4khGko9WTAnF6hhy%2Fzhidao%2Fpic%2Fitem%2Fb2de9c82d158ccbf966e26f710d8bc3eb0354129.jpg&refer=http%3A%2F%2Fgss0.baidu.com&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=jpeg?sec=1641350661&t=5fedb443fdc2307ec5fcf6ae7d328883';
        let moonUrl = 'https://img2.baidu.com/it/u=4210058006,2612068669&fm=26&fmt=auto';
        earth = sphereGeomery(earthUrl, EARCH_RADIUS, 16, 16);
        moon = sphereGeomery(moonUrl, MOON_RADIUS, 16, 16);

        // createLabel(earth, '地球', EARCH_RADIUS);
        // createLabel(moon, '月亮', MOON_RADIUS);
        
        scene.add(earth);
        scene.add(moon);
        //相机初始化
        camera = new THREE.PerspectiveCamera(45, window.innerWidth / window.innerHeight, 0.1, 500);
        camera.position.set(0, 0, 20);
        //渲染器初始化
        renderer = new THREE.WebGLRenderer({
            antialias: true,//消除锯齿
            alpha: true //透明
        });
        renderer.setSize(window.innerWidth, window.innerHeight);
        renderer.setPixelRatio(window.devicePixelRatio);
        document.body.appendChild(renderer.domElement);

        labelRenderer = new THREE.CSS2DRenderer();
        labelRenderer.setSize(window.innerWidth, window.innerHeight);

        labelRenderer.domElement.style.position = 'absolute';
        labelRenderer.domElement.style.top = '0px';

        document.body.appendChild(labelRenderer.domElement);
        //增加鼠标拾取效果
        var controls = new THREE.OrbitControls(camera, renderer.domElement);

    }
    //创建物体
    function sphereGeomery(textureUrl, radius, widthSegments, heightSegments) {
        let geometry = new THREE.SphereGeometry(radius, widthSegments, heightSegments);
        let material = new THREE.MeshPhongMaterial({
            map: textureLoader.load(textureUrl)
        });
        let mesh = new THREE.Mesh(geometry, material);
        return mesh;

    }
    //创建标签
    function createLabel(mesh, text, radius) {
        const div = document.createElement('div');
        div.className = 'label';
        div.textContent = text;
        const label = new THREE.CSS2DObject(div);//声明html元素
        label.position.set(0, radius + 0.5, 0);
        mesh.add(label);
    }
    //动画
    function ani() {
        const elapsed = clock.getElapsedTime();
        moon.position.set(Math.sin(elapsed) * 5, 0, Math.cos(elapsed) * 5);//月球绕行
        var axis = new THREE.Vector3(0, 1, 0);//Y向量
        earth.rotateOnAxis(axis, (elapsed - oldtime) * Math.PI / 10);//地球沿着Y轴自转

        renderer.render(scene, camera);
        labelRenderer.render(scene, camera);

        oldtime = elapsed;

        requestAnimationFrame(ani);

    }
    window.onresize =  function(){
        camera.aspect = window.innerWidth /window.innerHeight;
        camera.updateProjectionMatrix();
        renderer.setSize(window.innerWidth, window.innerHeight);
    }
</script>
login.gif
最后编辑于
©著作权归作者所有,转载或内容合作请联系作者
  • 序言:七十年代末,一起剥皮案震惊了整个滨河市,随后出现的几起案子,更是在滨河造成了极大的恐慌,老刑警刘岩,带你破解...
    沈念sama阅读 214,922评论 6 497
  • 序言:滨河连续发生了三起死亡事件,死亡现场离奇诡异,居然都是意外死亡,警方通过查阅死者的电脑和手机,发现死者居然都...
    沈念sama阅读 91,591评论 3 389
  • 文/潘晓璐 我一进店门,熙熙楼的掌柜王于贵愁眉苦脸地迎上来,“玉大人,你说我怎么就摊上这事。” “怎么了?”我有些...
    开封第一讲书人阅读 160,546评论 0 350
  • 文/不坏的土叔 我叫张陵,是天一观的道长。 经常有香客问我,道长,这世上最难降的妖魔是什么? 我笑而不...
    开封第一讲书人阅读 57,467评论 1 288
  • 正文 为了忘掉前任,我火速办了婚礼,结果婚礼上,老公的妹妹穿的比我还像新娘。我一直安慰自己,他们只是感情好,可当我...
    茶点故事阅读 66,553评论 6 386
  • 文/花漫 我一把揭开白布。 她就那样静静地躺着,像睡着了一般。 火红的嫁衣衬着肌肤如雪。 梳的纹丝不乱的头发上,一...
    开封第一讲书人阅读 50,580评论 1 293
  • 那天,我揣着相机与录音,去河边找鬼。 笑死,一个胖子当着我的面吹牛,可吹牛的内容都是我干的。 我是一名探鬼主播,决...
    沈念sama阅读 39,588评论 3 414
  • 文/苍兰香墨 我猛地睁开眼,长吁一口气:“原来是场噩梦啊……” “哼!你这毒妇竟也来了?” 一声冷哼从身侧响起,我...
    开封第一讲书人阅读 38,334评论 0 270
  • 序言:老挝万荣一对情侣失踪,失踪者是张志新(化名)和其女友刘颖,没想到半个月后,有当地人在树林里发现了一具尸体,经...
    沈念sama阅读 44,780评论 1 307
  • 正文 独居荒郊野岭守林人离奇死亡,尸身上长有42处带血的脓包…… 初始之章·张勋 以下内容为张勋视角 年9月15日...
    茶点故事阅读 37,092评论 2 330
  • 正文 我和宋清朗相恋三年,在试婚纱的时候发现自己被绿了。 大学时的朋友给我发了我未婚夫和他白月光在一起吃饭的照片。...
    茶点故事阅读 39,270评论 1 344
  • 序言:一个原本活蹦乱跳的男人离奇死亡,死状恐怖,灵堂内的尸体忽然破棺而出,到底是诈尸还是另有隐情,我是刑警宁泽,带...
    沈念sama阅读 34,925评论 5 338
  • 正文 年R本政府宣布,位于F岛的核电站,受9级特大地震影响,放射性物质发生泄漏。R本人自食恶果不足惜,却给世界环境...
    茶点故事阅读 40,573评论 3 322
  • 文/蒙蒙 一、第九天 我趴在偏房一处隐蔽的房顶上张望。 院中可真热闹,春花似锦、人声如沸。这庄子的主人今日做“春日...
    开封第一讲书人阅读 31,194评论 0 21
  • 文/苍兰香墨 我抬头看了看天上的太阳。三九已至,却和暖如春,着一层夹袄步出监牢的瞬间,已是汗流浃背。 一阵脚步声响...
    开封第一讲书人阅读 32,437评论 1 268
  • 我被黑心中介骗来泰国打工, 没想到刚下飞机就差点儿被人妖公主榨干…… 1. 我叫王不留,地道东北人。 一个月前我还...
    沈念sama阅读 47,154评论 2 366
  • 正文 我出身青楼,却偏偏与公主长得像,于是被迫代替她去往敌国和亲。 传闻我的和亲对象是个残疾皇子,可洞房花烛夜当晚...
    茶点故事阅读 44,127评论 2 352