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js实现旋转的3D球体标签云

点击这里查看效果

代码如下:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
<style>
.tagBall{
width: 800px;
height: 800px;
margin:50px auto;
position: relative;
}
.tag{
display: block;
position: absolute;
left: 0px;
top: 0px;
color: #000;
text-decoration: none;
font-size: 15px;
font-family: "微软雅黑";
font-weight: bold;
}
.tag:hover{border:1px solid #666;}
</style>
<title>3D标签-柯乐义</title>
</head>
<body>
<div class="tagBall">
<a class="tag" target="_blank" href="http://keleyi.com">某某某</a>
<a class="tag" target="_blank" href="http://keleyi.com">马到成功</a>
<a class="tag" target="_blank" href="http://keleyi.com">某某某</a>
<a class="tag" target="_blank" href="http://keleyi.com">我喜欢你</a>
<a class="tag" target="_blank" href="http://keleyi.com">某某某</a>
<a class="tag" target="_blank" href="http://keleyi.com/a/bjad/9sgmqsee.htm">新年快乐</a>
<a class="tag" target="_blank" href="http://keleyi.com">某某某</a>
<a class="tag" target="_blank" href="http://keleyi.com">我喜欢你</a>
<a class="tag" target="_blank" href="http://keleyi.com/a/bjad/9sgmqsee.htm">某某某</a>
<a class="tag" target="_blank" href="http://keleyi.com/a/bjad/9sgmqsee.htm">我喜欢你</a>
<a class="tag" target="_blank" href="http://keleyi.com">某某某</a>
<a class="tag" target="_blank" href="http://keleyi.com">我喜欢你</a>
<a class="tag" target="_blank" href="http://keleyi.com">某某某</a>
<a class="tag" target="_blank" href="http://keleyi.com">笑口常开</a>
<a class="tag" target="_blank" href="http://keleyi.com">柯乐义</a>
<a class="tag" target="_blank" href="http://keleyi.com">我喜欢你</a>
<a class="tag" target="_blank" href="http://keleyi.com">某某某</a>
<a class="tag" target="_blank" href="http://keleyi.com">我喜欢你</a>
<a class="tag" target="_blank" href="http://keleyi.com">某某某</a>
<a class="tag" target="_blank" href="http://keleyi.com">我喜欢你</a>
<a class="tag" target="_blank" href="http://keleyi.com">柯乐义</a>
<a class="tag" target="_blank" href="http://keleyi.com">Happy New Year!</a>
<a class="tag" target="_blank" href="http://keleyi.com">某某某</a>
<a class="tag" target="_blank" href="http://keleyi.com">我喜欢你</a>
<a class="tag" target="_blank" href="http://keleyi.com">我喜欢你</a>
<a class="tag" target="_blank" href="http://keleyi.com">某某某</a>
<a class="tag" target="_blank" href="http://keleyi.com">我喜欢你</a>
<a class="tag" target="_blank" href="http://keleyi.com">某某某</a>
<a class="tag" target="_blank" href="http://keleyi.com/a/bjad/9sgmqsee.htm">我喜欢你</a>
<a class="tag" target="_blank" href="http://keleyi.com">柯乐义</a>
<a class="tag" target="_blank" href="http://keleyi.com">我喜欢你</a>
<a class="tag" target="_blank" href="http://keleyi.com">好运连连</a>
<a class="tag" target="_blank" href="http://keleyi.com">某某某</a>
<a class="tag" target="_blank" href="http://keleyi.com">我喜欢你</a>
<a class="tag" target="_blank" href="http://keleyi.com">红澄黄绿青蓝紫</a>
<a class="tag" target="_blank" href="http://keleyi.com">我喜欢你</a>
<a class="tag" target="_blank" href="http://keleyi.com">我喜欢你</a>
<a class="tag" target="_blank" href="http://keleyi.com">某某某</a>
<a class="tag" target="_blank" href="http://keleyi.com">我喜欢你</a>
<a class="tag" target="_blank" href="http://keleyi.com">某某某</a>
<a class="tag" target="_blank" href="http://keleyi.com">我喜欢你</a>
<a class="tag" target="_blank" href="http://keleyi.com">某某某</a>
<a class="tag" target="_blank" href="http://keleyi.com">好运连连</a>
<a class="tag" target="_blank" href="http://keleyi.com">好运连连</a>
<a class="tag" target="_blank" href="http://keleyi.com">某某某</a>
<a class="tag" target="_blank" href="http://keleyi.com">我喜欢你</a>
</div>
<script type="text/javascript">
var tagEle = "querySelectorAll" in document ? document.querySelectorAll(".tag") : getClass("tag"),
paper = "querySelectorAll" in document ? document.querySelector(".tagBall") : getClass("tagBall")[0];
RADIUS = 300,
fallLength = 500,
tags = [],
angleX = Math.PI / 500,
angleY = Math.PI / 500,
CX = paper.offsetWidth / 2,
CY = paper.offsetHeight / 2,
EX = paper.offsetLeft + document.body.scrollLeft + document.documentElement.scrollLeft,
EY = paper.offsetTop + document.body.scrollTop + document.documentElement.scrollTop;

function getClass(className) {
var ele = document.getElementsByTagName("*");
var classEle = [];
for (var i = 0; i < ele.length; i++) {
var cn = ele[i].className;
if (cn === className) {
classEle.push(ele[i]);
}
}
return classEle;
}

function innit() {
for (var i = 0; i < tagEle.length; i++) {
var a, b;
var k = (2 * (i + 1) - 1) / tagEle.length - 1;
var a = Math.acos(k);
var b = a * Math.sqrt(tagEle.length * Math.PI);
// var a = Math.random()*2*Math.PI;
// var b = Math.random()*2*Math.PI;
var x = RADIUS * Math.sin(a) * Math.cos(b);
var y = RADIUS * Math.sin(a) * Math.sin(b);
var z = RADIUS * Math.cos(a);
var t = new tag(tagEle[i], x, y, z);
tagEle[i].style.color = "rgb(" + parseInt(Math.random() * 255) + "," + parseInt(Math.random() * 255) + "," + parseInt(Math.random() * 255) + ")";
tags.push(t);
t.move();
}
}

Array.prototype.forEach = function (callback) {
for (var i = 0; i < this.length; i++) {
callback.call(this[i]);
}
}

function animate() {
setInterval(function () {
rotateX();
rotateY();
tags.forEach(function () {
this.move();
})
}, 17)
}

if ("addEventListener" in window) {
paper.addEventListener("mousemove", function (event) {
var x = event.clientX - EX - CX;
var y = event.clientY - EY - CY;
// angleY = -x* (Math.sqrt(Math.pow(x , 2) + Math.pow(y , 2)) > RADIUS/4 ? 0.0002 : 0.0001);
// angleX = -y* (Math.sqrt(Math.pow(x , 2) + Math.pow(y , 2)) > RADIUS/4 ? 0.0002 : 0.0001);
angleY = x * 0.0001;
angleX = y * 0.0001;
});
}
else {
paper.attachEvent("onmousemove", function (event) {
var x = event.clientX - EX - CX;
var y = event.clientY - EY - CY;
angleY = x * 0.0001;
angleX = y * 0.0001;
});
}

function rotateX() {
var cos = Math.cos(angleX);
var sin = Math.sin(angleX);
tags.forEach(function () {
var y1 = this.y * cos - this.z * sin;
var z1 = this.z * cos + this.y * sin;
this.y = y1;
this.z = z1;
})

}

function rotateY() {
var cos = Math.cos(angleY);
var sin = Math.sin(angleY);
tags.forEach(function () {
var x1 = this.x * cos - this.z * sin;
var z1 = this.z * cos + this.x * sin;
this.x = x1;
this.z = z1;
})
}

var tag = function (ele, x, y, z) {
this.ele = ele;
this.x = x;
this.y = y;
this.z = z;
}

tag.prototype = {
move: function () {
var scale = fallLength / (fallLength - this.z);
var alpha = (this.z + RADIUS) / (2 * RADIUS);
this.ele.style.fontSize = 15 * scale + "px";
this.ele.style.opacity = alpha + 0.5;
this.ele.style.filter = "alpha(opacity = " + (alpha + 0.5) * 100 + ")";
this.ele.style.zIndex = parseInt(scale * 100);
this.ele.style.left = this.x + CX - this.ele.offsetWidth / 2 + "px";
this.ele.style.top = this.y + CY - this.ele.offsetHeight / 2 + "px";
}
}
innit();
animate();
</script>
</body>
</html>
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