HTML5模仿逼真地球自转

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查看效果：http://hovertree.com/texiao/html5/8.htm

给我一个支点，我就可以撬动地球阿基米德

下载 http://hovertree.com/down/h/earthhovertree.htm

代码如下：

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">

<head>

<title>html5 canvas让地球转动起来 - 何问起</title><base target="_blank" />

<script type="text/javascript" src="http://hovertree.com/texiao/html5/8/clay.min.js"></script>

<script type="text/javascript">

function Earth() {

var stage = new Clay.Stage(800, 600);

var world = stage.getWorld();

var camera = stage.getCamera();

camera.set(0,0,0);

camera.setResolution(800, 600);

camera.setTarget(new Clay.Vector(-100,0,100));

window.onresize = function() {

stage.resizeTo(

800,600

);

};

window.onresize();

Clay.Collada.load('http://hovertree.com/texiao/html5/8/earth.xml', function (scene) {

scene.init(stage);

var earth = new Clay.Texture('http://hovertree.com/texiao/html5/8/earthmap1k.jpg', stage);

var clouds = new Image();

clouds.src = 'http://hovertree.com/texiao/html5/8/earthclouds1k.png';

var dark = new Image();

dark.src = 'http://hovert'+'ree.com/texiao/html5/8/darkside.png';

var waiting = setInterval(function(){

if (earth.complete && clouds.complete && dark.complete){

clearInterval(waiting);

play();

}

}, 1000);

function play() {

var shape = world.getShapes()[0];

shape.setMaterial(earth);

var x, y, z, t = Math.PI/4, r = 0, tick = 0.01, radius = 200;

var ttx = earth.canvas.getContext('2d');

var base = earth.image;

var wind = 0;

stage.addEvent('enterframe', function(){

ttx.drawImage(base, 0,0);

var pos = (++wind)%1000;

ttx.drawImage(clouds, pos, 0);

ttx.drawImage(clouds, pos-1000, 0);

ttx.drawImage(dark, 0,0);

t += tick;

x = -100 + Math.sin(t) * radius;

z = 100 + Math.cos(t) * radius;

y = Math.cos(t/3) * 50

camera.set(x, y, z);

});

stage.run();

}

});

}

window.addEventListener('load', function(){

new Earth();

}, false);

</script>

<style type="text/css">

html, body {

width: 100%;

height: 100%;

margin: 0;

padding: 0;

position: relative;

background: black;

}

.canvas3D {

background: black;

position: absolute;

left: 0;

top: 0;

}

.earthhovertree{z-index:4321;position:fixed;left:789px;color:white;height:1234px}a{color:white}

</style>

</head>

<body>

<div class="earthhovertree">

<h3>给我一个支点，我就可以撬动地球 阿基米德</h3>

<h3>给我一个HTML5浏览器，我就能转动地球 何问起</h3>

<a href="http://hovertree.com">首页</a>

<a href="http://hovertree.com/texiao/">特效</a>

<a href="http://hovertree.com/hvtart/bjae/dubjwt12.htm">原文</a>

<a href="http://hovertree.com/texiao/html5/7.htm">时钟</a>

<a href="http://hovertree.com/texiao/css/12.htm">登录</a>

<a href="http://hovertree.com/texiao/css/8.htm">打火机</a>

<a href="http://hovertree.com/texiao/html5/6.htm">玫瑰花</a>

<a href="http://hovertree.com/texiao/css/9.htm">3D文字</a>  <a href="http://hovertree.com/texiao/html5/9.htm">太阳系</a>

<br />Clay - A 3D engine on canvas

<br />

<img src="//pic.ikafan.com/imgp/L3Byb3h5L2h0dHAvaG92ZXJ0cmVlLmNvbS9odnRpbWcvMjAxNTEyL3BjbWtqM2liLnBuZw==.jpg" alt="阿基米德" />

</div>

<div>

<div id="canvas">

您的浏览器不支持canvas，请使用支持HTML5的浏览器查看本页。何问起 hovertree.com

</div>

</div>

</body>

</html>