盒子
盒子

为博客添加3D标签云

看到别人博客的标签云,羡慕的很啊,必须搞一个。

看到别人博客的标签云,羡慕的很啊,必须搞一个,于是找来了相关代码来修改
核心js代码如下:

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var radius = 90;
var dtr = Math.PI / 180;
var d = 300;

var mcList = [];
var active = false;
var lasta = 1;
var lastb = 1;
var distr = true;
var tspeed = 10;
var size = 250;

var mouseX = 0;
var mouseY = 0;

var howElliptical = 1;

var aA = null;
var oDiv = null;

window.onload = function() {
var i = 0;
var oTag = null;

oDiv = document.getElementById('newstags');

aA = oDiv.getElementsByTagName('a');

for (i = 0; i < aA.length; i++) {
oTag = {};

oTag.offsetWidth = aA[i].offsetWidth;
oTag.offsetHeight = aA[i].offsetHeight;

mcList.push(oTag);
}

sineCosine(0, 0, 0);

positionAll();

oDiv.onmouseover = function() {
active = true;
};

oDiv.onmouseout = function() {
active = false;
};

oDiv.onmousemove = function(ev) {
var oEvent = window.event || ev;

mouseX = oEvent.clientX - (oDiv.offsetLeft + oDiv.offsetWidth / 2);
mouseY = oEvent.clientY - (oDiv.offsetTop + oDiv.offsetHeight / 2);

mouseX /= 5;
mouseY /= 5;
};

setInterval(update, 30);
};

function update() {
var a;
var b;

if (active) {
a = (-Math.min(Math.max(-mouseY, -size), size) / radius) * tspeed;
b = (Math.min(Math.max(-mouseX, -size), size) / radius) * tspeed;
} else {
a = lasta * 0.98;
b = lastb * 0.98;
}

lasta = a;
lastb = b;

if (Math.abs(a) <= 0.01 && Math.abs(b) <= 0.01) {
return;
}

var c = 0;
sineCosine(a, b, c);
for (var j = 0; j < mcList.length; j++) {
var rx1 = mcList[j].cx;
var ry1 = mcList[j].cy * ca + mcList[j].cz * (-sa);
var rz1 = mcList[j].cy * sa + mcList[j].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[j].cx = rx3;
mcList[j].cy = ry3;
mcList[j].cz = rz3;

per = d / (d + rz3);

mcList[j].x = (howElliptical * rx3 * per) - (howElliptical * 2);
mcList[j].y = ry3 * per;
mcList[j].scale = per;
mcList[j].alpha = per;

mcList[j].alpha = (mcList[j].alpha - 0.6) * (10 / 6);
}

doPosition();
depthSort();
}

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;
var i = 0;

var aTmp = [];
var oFragment = document.createDocumentFragment();

//Ëæ»úÅÅÐò
for (i = 0; i < aA.length; i++) {
aTmp.push(aA[i]);
}

aTmp.sort(
function() {
return Math.random() < 0.5 ? 1 : -1;
}
);

for (i = 0; i < aTmp.length; i++) {
oFragment.appendChild(aTmp[i]);
}

oDiv.appendChild(oFragment);

for (var i = 1; i < max + 1; i++) {
if (distr) {
phi = Math.acos(-1 + (2 * i - 1) / max);
theta = Math.sqrt(max * Math.PI) * phi;
} else {
phi = Math.random() * (Math.PI);
theta = Math.random() * (2 * Math.PI);
}
//×ø±ê±ä»»
mcList[i - 1].cx = radius * Math.cos(theta) * Math.sin(phi);
mcList[i - 1].cy = radius * Math.sin(theta) * Math.sin(phi);
mcList[i - 1].cz = radius * Math.cos(phi);

aA[i - 1].style.left = mcList[i - 1].cx + oDiv.offsetWidth / 2 - mcList[i - 1].offsetWidth / 2 + 'px';
aA[i - 1].style.top = mcList[i - 1].cy + oDiv.offsetHeight / 2 - mcList[i - 1].offsetHeight / 2 + 'px';
}
}

function doPosition() {
var l = oDiv.offsetWidth / 2;
var t = oDiv.offsetHeight / 2;
for (var i = 0; i < mcList.length; i++) {
aA[i].style.left = mcList[i].cx + l - mcList[i].offsetWidth / 2 + 'px';
aA[i].style.top = mcList[i].cy + t - mcList[i].offsetHeight / 2 + 'px';

aA[i].style.fontSize = Math.ceil(12 * mcList[i].scale / 2) + 8 + 'px';

aA[i].style.filter = "alpha(opacity=" + 100 * mcList[i].alpha + ")";
aA[i].style.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);
}