Emlog非插件实现3D标签云

今天带来一期emlog教程标签美化，Emlog非插件实现3D标签云

Emlog怎么实现3D标签云？

1.module找到你的侧边栏标签 修改侧边栏标签如下

 <?php
 //3D标签云
 function widget_tag($title){
 global $CACHE;
 $tag_cache = $CACHE->readCache('tags');?>
 <div class="side">
 <h3><i class="fa fa-tags mar-r-4"></i><?php echo $title;?></h3>
 <div id="tag_cloud_widget">
 <div class="tagcloud">
 <script type="text/javascript" src="<?php echo TEMPLATE_URL; ?>js/3dtag.js"></script>
 <?php foreach($tag_cache as $value): ?>
 <a href="<?php echo Url::tag($value['tagurl']); ?>" title="<?php echo $value['usenum']; ?> 篇文章"><?php echo $value['tagname']; ?></a>
 <?php endforeach; ?>
 <div class="clear"></div></div></div></div>
 <?php }?>

2.你的公用模板css放如下css

 /*3D标签云*/
 #tag_cloud_widget{position:relative;width:240px;height:240px;margin:10px auto 10px}
 #tag_cloud_widget a{position:absolute;color:#fff;text-align:center;text-overflow:ellipsis;white-space:nowrap;top:0;left:0;padding:3px 5px;border:0}
 #tag_cloud_widget a:hover{background:#d02f53;display:block}
 #tag_cloud_widget a:nth-child(n){background:#666;border-radius:3px;display:inline-block;line-height:18px;margin:0 10px 15px 0}
 #tag_cloud_widget a:nth-child(2n){background:#d1a601}
 #tag_cloud_widget a:nth-child(3n){background:#286c4a}
 #tag_cloud_widget a:nth-child(5n){background:#518ab2}
 #tag_cloud_widget a:nth-child(4n){background:#c91d13}

3.保存下面js为3dtag.js 放到你的模板js目录里面

 var radius = 100;
 var d = 200;
 var dtr = Math.PI / 180;
 var mcList = [];
 var lasta = 1;
 var lastb = 1;
 var distr = true;
 var tspeed = 11;
 var size = 200;
 var mouseX = 0;
 var mouseY = 10;
 var howElliptical = 1;
 var aA = null;
 var oDiv = null;
 window.onload = function() {
 var i = 0;
 var oTag = null;
 oDiv = document.getElementById('tag_cloud_widget');
 aA = oDiv.getElementsByTagName('a');
 for (i = 0; i < aA.length; i++) {
 oTag = {};
 aA[i].onmouseover = (function(obj) {
 return function() {
 obj.on = true;
 this.style.zIndex = 9999;
 this.style.color = '#fff';
 this.style.background = '#0099ff';
 this.style.padding = '5px 5px';
 this.style.filter = "alpha(opacity=100)";
 this.style.opacity = 1
 }
 })(oTag) aA[i].onmouseout = (function(obj) {
 return function() {
 obj.on = false;
 this.style.zIndex = obj.zIndex;
 this.style.color = '#fff';
 this.style.background = '#30899B';
 this.style.padding = '5px';
 this.style.filter = "alpha(opacity=" + 100 * obj.alpha + ")";
 this.style.opacity = obj.alpha;
 this.style.zIndex = obj.zIndex
 }
 })(oTag) oTag.offsetWidth = aA[i].offsetWidth;
 oTag.offsetHeight = aA[i].offsetHeight;
 mcList.push(oTag)
 }
 sineCosine(0, 0, 0);
 positionAll(); (function() {
 update();
 setTimeout(arguments.callee, 40)
 })()
 };
 function update() {
 var a, b, c = 0;
 a = (Math.min(Math.max( - mouseY, -size), size) / radius) * tspeed;
 b = ( - Math.min(Math.max( - mouseX, -size), size) / radius) * tspeed;
 lasta = a;
 lastb = b;
 if (Math.abs(a) <= 0.01 && Math.abs(b) <= 0.01) {
 return
 }
 sineCosine(a, b, c);
 for (var i = 0; i < mcList.length; i++) {
 if (mcList[i].on) {
 continue
 }
 var rx1 = mcList[i].cx;
 var ry1 = mcList[i].cy * ca + mcList[i].cz * ( - sa);
 var rz1 = mcList[i].cy * sa + mcList[i].cz * ca;
 var rx2 = rx1 * cb + rz1 * sb;
 var ry2 = ry1;
 var rz2 = rx1 * ( - sb) + rz1 * cb;
 var rx3 = rx2 * cc + ry2 * ( - sc);
 var ry3 = rx2 * sc + ry2 * cc;
 var rz3 = rz2;
 mcList[i].cx = rx3;
 mcList[i].cy = ry3;
 mcList[i].cz = rz3;
 per = d / (d + rz3);
 mcList[i].x = (howElliptical * rx3 * per) - (howElliptical * 2);
 mcList[i].y = ry3 * per;
 mcList[i].scale = per;
 var alpha = per;
 alpha = (alpha - 0.6) * (10 / 6);
 mcList[i].alpha = alpha * alpha * alpha - 0.2;
 mcList[i].zIndex = Math.ceil(100 - Math.floor(mcList[i].cz))
 }
 doPosition()
 }
 function depthSort() {
 var i = 0;
 var aTmp = [];
 for (i = 0; i < aA.length; i++) {
 aTmp.push(aA[i])
 }
 aTmp.sort(function(vItem1, vItem2) {
 if (vItem1.cz > vItem2.cz) {
 return - 1
 } else if (vItem1.cz < vItem2.cz) {
 return 1
 } else {
 return 0
 }
 });
 for (i = 0; i < aTmp.length; i++) {
 aTmp[i].style.zIndex = i
 }
 }
 function positionAll() {
 var phi = 0;
 var theta = 0;
 var max = mcList.length;
 for (var i = 0; i < max; i++) {
 if (distr) {
 phi = Math.acos( - 1 + (2 * (i + 1) - 1) / max);
 theta = Math.sqrt(max * Math.PI) * phi
 } else {
 phi = Math.random() * (Math.PI);
 theta = Math.random() * (2 * Math.PI)
 }
 mcList[i].cx = radius * Math.cos(theta) * Math.sin(phi);
 mcList[i].cy = radius * Math.sin(theta) * Math.sin(phi);
 mcList[i].cz = radius * Math.cos(phi);
 aA[i].style.left = mcList[i].cx + oDiv.offsetWidth / 2 - mcList[i].offsetWidth / 2 + 'px';
 aA[i].style.top = mcList[i].cy + oDiv.offsetHeight / 2 - mcList[i].offsetHeight / 2 + 'px'
 }
 }
 function doPosition() {
 var l = oDiv.offsetWidth / 2;
 var t = oDiv.offsetHeight / 2;
 for (var i = 0; i < mcList.length; i++) {
 if (mcList[i].on) {
 continue
 }
 var aAs = aA[i].style;
 if (mcList[i].alpha > 0.1) {
 if (aAs.display != '') aAs.display = ''
 } else {
 if (aAs.display != 'none') aAs.display = 'none';
 continue
 }
 aAs.left = mcList[i].cx + l - mcList[i].offsetWidth / 2 + 'px';
 aAs.top = mcList[i].cy + t - mcList[i].offsetHeight / 2 + 'px';
 aAs.filter = "alpha(opacity=" + 100 * mcList[i].alpha + ")";
 aAs.zIndex = mcList[i].zIndex;
 aAs.opacity = mcList[i].alpha
 }
 }
 function sineCosine(a, b, c) {
 sa = Math.sin(a * dtr);
 ca = Math.cos(a * dtr);
 sb = Math.sin(b * dtr);
 cb = Math.cos(b * dtr);
 sc = Math.sin(c * dtr);
 cc = Math.cos(c * dtr)
 }