前几天写了左边这个3D球状导航的文章分类，这里对实现细节做个简单记录。

效果：

分类标题呈现3D球状效果，点击分类标题的时候，会弹出这个分类对应的推荐文章列表。

效果截图：

HTML：

    <div id="mainList">
        <div id="list">
            <ul>
                <li><a class="HTML" onclick="ClickLink(this)" href="#">HTML</a></li>
                <li><a class="CSS" onclick="ClickLink(this)" href="#">CSS</a></li>
                <li><a class="JS" onclick="ClickLink(this)" href="#">JavaScript</a></li>
                <li><a class="AJAX" onclick="ClickLink(this)" href="#">Ajax</a></li>
                <li><a class="ASPNET" onclick="ClickLink(this)" href="#">Asp.net</a></li>
                <li><a class="CSHARP" onclick="ClickLink(this)" href="#">C#</a></li>
                <li><a class="DEBUG" onclick="ClickLink(this)" href="#">Debugging</a></li>
                <li><a class="PERF" onclick="ClickLink(this)" href="#">Performance</a></li>
                <li><a class="ARCHITERT" onclick="ClickLink(this)" href="#">Architect</a></li>
            </ul>
        </div>  

核心JS:动态生成3D球状云+弹出模式窗体-articlemap.js

$(function() {

    var element = $('#list a'); ;
    var offset = 0;
    var stepping = 0.02;
    var list = $('#list');
    var $list = $(list)

    $list.mousemove(function(e) {
        var topOfList = $list.eq(0).offset().top
        var listHeight = $list.height()
        stepping = (e.clientY - topOfList) / listHeight * 0.2 - 0.1;

    });

    for (var i = element.length - 1; i >= 0; i--) {
        element[i].elemAngle = i * Math.PI * 2 / element.length;
    }

    setInterval(render, 50);

    function render() {
        for (var i = element.length - 1; i >= 0; i--) {

            var angle = element[i].elemAngle + offset;

            x = 120 + Math.sin(angle) * 30;
            y = 45 + Math.cos(angle) * 40;
            size = Math.round(15 - Math.sin(angle) * 15);

            var elementCenter = $(element[i]).width() / 2;

            var leftValue = (($list.width() / 2) * x / 100 - elementCenter) + "px"

            $(element[i]).css("fontSize", size + "pt");
            $(element[i]).css("opacity", size / 100);
            $(element[i]).css("zIndex", size);
            $(element[i]).css("left", leftValue);
            $(element[i]).css("top", y + "%");
        }

        offset += stepping;
    }

});

function ClickLink(item) {
    var typName = $(item).text();

    var links = null;

    switch (typName) {
        case "HTML":
            links = TrainLinks(Links.HTML);
            break;
        case "CSS":
            links = TrainLinks(Links.CSS);
            break;
        case "JavaScript":
            links = TrainLinks(Links.JavaScript);
            break;
        case "Ajax":
            links = TrainLinks(Links.Ajax);
            break;
        case "Asp.net":
            links = TrainLinks(Links.Aspnet);
            break;
        case "C#":
            links = TrainLinks(Links.CSharp);
            break;
        case "Debugging":
            links = TrainLinks(Links.Debugging);
            break;
        case "Performance":
            links = TrainLinks(Links.Performance);
            break;
        case "Architect":
            links = TrainLinks(Links.Architect);
            break;
    }

    CommonHelper.showNoBtnAlert(typName, links);
}

function TrainLinks(arr) {
    var links = "这个可以有，暂时还没有！";
    if (arr.length > 0) {
        links = '<div><ul>';
    }
    for (i = 0, j = arr.length; i < j; i++) {
        links += '<li><a target="_blank" href="' + arr[i][0] + '">' + arr[i][1] + '</a></li>';
    }
    if (arr.length > 0) {
        links += '</ul></div>';
    }

    return links;
}

辅助存储推荐文章列表的JS（未来通过修改这个文件来维护推荐文章）:

var Links = {
    HTML: [],
    CSS: [["http://www.cnblogs.com/justinw/archive/2010/06/16/1758922.html", "制作50个超棒动画效果教程"]],
    JavaScript: [
    ["http://www.cnblogs.com/justinw/archive/2009/11/27/1611728.html", "[原创]AjaxControlToolkitTests自动测试框架xx解析之一：架构篇 "],
    ["http://www.cnblogs.com/justinw/archive/2009/11/30/1613391.html", "[原创]AjaxControlToolkitTests自动测试框架xx解析之二：实现篇(1) "],
    ["http://www.cnblogs.com/justinw/archive/2009/12/02/1615382.html", "[JavaScript] 使用document.createDocumentFragment优化性能 "],
    ],
    Ajax: [],
    Aspnet: [],
    CSharp: [],
    ......
    Performance: [
    ["http://www.cnblogs.com/justinw/archive/2009/11/26/1611397.html", "[推荐]前端性能分析工具：dynaTrace Ajax Edition"]
    ]
}

其他：

这里还引用了jQuery UI的Dialog和一些自定义的CSS设置，具体参考实例即可。

下载源代码：