<!doctype html>
<html lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
<style>
.tagBall {
width: 500px;
height: 500px;
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;
will-change: transform;
}
.tag:hover {
border: 1px solid #666;
}
</style>
<title>3D标签云</title>
</head>
<body>
<div class="tagBall">
<a class="tag" href="#">WAXES</a>
<a class="tag" href="#">3D标签云</a>
<a class="tag" href="#">WAXES</a>
<a class="tag" href="#">3D标签云</a>
<a class="tag" href="#">WAXES</a>
<a class="tag" href="#">3D标签云</a>
<a class="tag" href="#">WAXES</a>
<a class="tag" href="#">3D标签云</a>
<a class="tag" href="#">WAXES</a>
<a class="tag" href="#">3D标签云</a>
<a class="tag" href="#">WAXES</a>
<a class="tag" href="#">3D标签云</a>
<a class="tag" href="#">WAXES</a>
<a class="tag" href="#">3D标签云</a>
<a class="tag" href="#">WAXES</a>
<a class="tag" href="#">3D标签云</a>
<a class="tag" href="#">WAXES</a>
<a class="tag" href="#">3D标签云</a>
<a class="tag" href="#">WAXES</a>
<a class="tag" href="#">3D标签云</a>
<a class="tag" href="#">WAXES</a>
<a class="tag" href="#">3D标签云</a>
<a class="tag" href="#">WAXES</a>
<a class="tag" href="#">3D标签云</a>
<a class="tag" href="#">3D标签云</a>
<a class="tag" href="#">WAXES</a>
<a class="tag" href="#">3D标签云</a>
<a class="tag" href="#">WAXES</a>
<a class="tag" href="#">3D标签云</a>
<a class="tag" href="#">WAXES</a>
<a class="tag" href="#">3D标签云</a>
<a class="tag" href="#">3D标签云</a>
<a class="tag" href="#">WAXES</a>
<a class="tag" href="#">3D标签云</a>
</div>
<script>
var tagEle = "querySelectorAll" in document ? document.querySelectorAll(".tag") : getClass("tag"),
paper = "querySelectorAll" in document ? document.querySelector(".tagBall") : getClass("tagBall")[0];
RADIUS = 220,
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 = -1 + (2 * (i + 1) - 1) / tagEle.length;
var a = Math.acos(k);
var b = a * Math.sqrt(tagEle.length * 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() {
rotateX();
rotateY();
tags.forEach(function() {
this.move();
});
requestAnimationFrame(animate);
}
if ("addEventListener" in window) {
paper.addEventListener("mousemove", function(event) {
var x = event.clientX - EX - CX;
var y = event.clientY - EY - CY;
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);
var left = this.x + CX - this.ele.offsetWidth / 2 + "px";
var top = this.y + CY - this.ele.offsetHeight / 2 + "px";
var transform = 'translate(' + left + ', ' + top + ') scale(' + scale + ')';
this.ele.style.opacity = alpha + 0.5;
this.ele.style.zIndex = parseInt(scale * 100);
this.ele.style.transform = transform;
this.ele.style.webkitTransform = transform;
}
}
innit();
animate();
</script>
</body>
</html>
