一款基于jQuery有趣的眼睛随鼠标进行有磁性的旋转

一款基于jQuery有趣的眼睛随鼠标进行有磁性的旋转,鼠标在何方，眼睛就往哪个方向转动，非常的的有趣的jQuery特效。适用浏览器：FireFox、Chrome、Safari、Opera、傲游、搜狗. 不支持IE8、360、世界之窗。

主要代码如下：

<script>
    var getAngle = function(Xc, Yc, Xa, Ya, Xb, Yb) {
        var v1x = Xb - Xc;
        var v1y = Yb - Yc;
        var v2x = Xa - Xc;
        var v2y = Ya - Yc;
        return 180 * (Math.atan2(v1x, v1y) - Math.atan2(v2x, v2y)) / Math.PI
    };
    var left_center_offset = {
        left: 30,
        top: 82
    },
    right_center_offset = {
        left: 96,
        top: 80
    },
    radius = 10;
    var setEyeOffset = function(event) {
        var offset = $(".eye_wrapper").offset();
        var x1 = offset.left + left_center_offset.left;
        var y1 = offset.top + left_center_offset.top;
        var x2 = offset.left + right_center_offset.left;
        var y2 = offset.top + right_center_offset.top;
        var n1 = event.clientX - x1;
        var m1 = -(event.clientY - y1);
        var k1 = Math.atan2(m1, n1);
        var n2 = event.clientX - x2;
        var m2 = -(event.clientY - y2);
        var k2 = Math.atan2(m2, n2);
        var x11 = (Math.cos(k1) * radius + x1).toFixed(0);
        var y11 = (( - Math.sin(k1) * radius) + y1).toFixed(0);
        $(".eye-left").offset({
            left: x11,
            top: y11
        });
        var x22 = (Math.cos(k2) * radius + x2).toFixed(0);
        var y22 = (( - Math.sin(k2) * radius) + y2).toFixed(0);
        $(".eye-right").offset({
            left: x22,
            top: y22
        })
    };
    $(window).mousemove(setEyeOffset);
</script>

浏览的效果图如下：

特效来源地址:http://www.jqshare.com/Jq/fondone/id/89.html

更多特效请关注：jquery特效