参考资料:http://blog.****.net/fense_520/article/details/37892507
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准备:
<!DOCTYPE html>
<head>
<meta charset="UTF-8">
<title>- UED - </title>
<style type="text/css" src="css/style.css"></style>
<script type="text/javascript" src="js/ext.js"></script>
</head> <div class="xxx"></div>
xxx按需更改
div { background:black;}
好。我们開始绘图吧!
1. 矩形
.rectangle { width:100px; height:100px;}
2. 圆形
.circle { width:100px; height:100px; border-radius:50px;}

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.cylinder {width:100px; height:100px; border-radius:100px/50px;}

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watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQveHpoX2xvb3A=/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/SouthEast" alt="">
为什么不会是图2-2的样子呢<待解决1>?当我们设置border-radius:100px/100px的时候,你会惊奇地发现,它又变回一个圆形了。你会以为它是图2-3的样子的,但实际上不是。它跟图1的圆形一样大小,这又是为什么呢<待解决2>?
.oval {width:200px; height:100px; border-radius:100px/50px;}
跟圆柱形差点儿相同,把正方形的宽扩张到200px,它正好容纳了那个椭圆。椭圆就是画出来的椭圆啦!
[class^=triangle-] { width:0px; height:0px;}
先以上三角形为例:
.triangle-up { border-left:50px solid transparent; border-right:50px solid transparent; border-bottom:100px solid red;}
这个三角形是怎么来的呢?我细细研究了一下。发现border之间有一条分界,而这条分界是45度倾斜的,如图-3,两border间有明显分界,这就是我们画三角形所要利用到的原理,上面已经设置width和height为0,这时两border交汇处就有一个由两个三角形组成的矩形啦,设置当中一个border为透明,就剩下一个三角形了。对,就是这么简单。那这个上三角形该怎么画?设置左右border和border-bottom,让左右border变透明。这时你们看到的上三角形事实上是由两个三角形组成的,如图-4。
其它种类的三角形类似,你看着哪几个border能组成这个三角形顺便调整一下border-width即可了。以前有一道笔试题——画出一条丝带,如今想想挺简单的,不就是一个黄色左三角形+黄色矩形+白色左三角形定位做成的嘛。例如以下:
div { float:left;}
#test { border-top:100px solid transparent; border-bottom:100px solid transparent; border-right:100px solid yellow;}
#test2 { width:800px; height:200px; background:yellow;}
#test3 { border-top:100px solid transparent; border-bottom:100px solid transparent; border-right:100px solid white; margin-left:-100px;}


.star-six { width:0; height:0; border-left:50px solid transparent; border-right:50px solid transparent; border-bottom:100px solid red; position:relative;}
.star-six:after { width:0; height:0; border-left:50px solid transparent; border-right:50px solid transparent; border-top:100px solid red; position:absolute; content:""; top:30px; left:-50px;}

.star-five { margin:50px 0; position:relative; width:0px; height:0px; border-left:100px solid transparent; border-right:100px solid transparent; border-bottom:70px solid red;
-webkit-transform:rotate(35deg);
-moz-transform:rotate(35deg);
-ms-transform:rotate(35deg);
-o-transform:rotate(35deg); }
.star-five:before { border-bottom:80px solid orange; border-left:30px solid transparent; border-right:30px solid transparent; position:absolute; height:0; width:0; top:-45px; left:-65px; display:block; content:'';
-webkit-transform:rotate(-35deg);
-moz-transform:rotate(-35deg);
-ms-transform:rotate(-35deg);
-o-transform:rotate(-35deg); }
.star-five:after { border-bottom:70px solid green; border-left:100px solid transparent; border-right:100px solid transparent; position:absolute; display:block; color:red; top:3px; left:-105px; width:0px; height:0px; content:'';
-webkit-transform:rotate(-70deg);
-moz-transform:rotate(-70deg);
-ms-transform:rotate(-70deg);
-o-transform:rotate(-70deg); }
使用前面的提到的方法,分别绘制三角形再旋转和定位而成。代码所看到的,:before伪类元素画出的是五角星顶部的小三角形。我们也能够把:before画成跟star-five和:after一样大小的三角形再旋转定位。

.pill { width:0px; height:0px; border-right:60px solid transparent; border-top:60px solid red; border-bottom:60px solid red; border-radius:60px;}

div { background:black;}
/*矩形*/
.rectangle { width:100px; height:100px;}
/*圆形*/
.circle { width:100px; height:100px; border-radius:50px;}
/*图柱形*/
.cylinder {width:100px; height:100px; border-radius:100px/50px;}
/*椭圆形*/
.oval {width:200px; height:100px; border-radius:100px/50px;} /*各种三角形*/
[class^=triangle-] { width:0px; height:0px;}
.triangle-up { border-left:50px solid transparent; border-right:50px solid transparent; border-bottom:100px solid red;}
.triangle-down { border-left:50px solid transparent; border-right:50px solid transparent; border-top:100px solid red;}
.triangle-equal { border-left:50px solid transparent; border-right:50px solid transparent; border-bottom:50px solid red;}
.triangle-left { border-top:50px solid transparent; border-right:100px solid red; border-bottom:50px solid transparent;}
.triangle-right { border-top:50px solid transparent; border-left:100px solid red; border-bottom:50px solid transparent;}
.triangle-left-up { border-top:100px solid red; border-right:200px solid transparent;}
.triangle-right-up { border-top:100px solid red; border-left:200px solid transparent;}
.triangle-left-down { border-bottom:100px solid red; border-right:200px solid transparent;}
.triangle-right-down { border-bottom:100px solid red; border-left:200px solid transparent;} /*平行四边形*/
.parallelogram { width:150px; height:100px; margin-left:20px;
-webkit-transform: skew(20deg);
-moz-transform: skew(20deg);
-o-transform: skew(20deg); }
/*梯形*/
.trapezoid { width:100px; height:0px; border-bottom:100px solid red; border-left:50px solid transparent; border-right:50px solid transparent;}
/*六角星*/
.star-six { width:0; height:0; border-left:50px solid transparent; border-right:50px solid transparent; border-bottom:100px solid red; position:relative;}
.star-six:after { width:0; height:0; border-left:50px solid transparent; border-right:50px solid transparent; border-top:100px solid red; position:absolute; content:""; top:30px; left:-50px;}
/*五角星*/
.star-five { margin:50px 0; position:relative; width:0px; height:0px; border-left:100px solid transparent; border-right:100px solid transparent; border-bottom:70px solid red;
-webkit-transform:rotate(35deg);
-moz-transform:rotate(35deg);
-ms-transform:rotate(35deg);
-o-transform:rotate(35deg); }
.star-five:before { border-bottom:80px solid orange; border-left:30px solid transparent; border-right:30px solid transparent; position:absolute; height:0; width:0; top:-45px; left:-65px; display:block; content:'';
-webkit-transform:rotate(-35deg);
-moz-transform:rotate(-35deg);
-ms-transform:rotate(-35deg);
-o-transform:rotate(-35deg); }
.star-five:after { border-bottom:70px solid green; border-left:100px solid transparent; border-right:100px solid transparent; position:absolute; display:block; color:red; top:3px; left:-105px; width:0px; height:0px; content:'';
-webkit-transform:rotate(-70deg);
-moz-transform:rotate(-70deg);
-ms-transform:rotate(-70deg);
-o-transform:rotate(-70deg); }
/*五角大楼*/
.pentagon { position:relative; width:54px; border-width:50px 18px 0; border-style:solid; border-color:red transparent;}
.pentagon:before { content:""; position:absolute; height:0; width:0; top:-85px; left:-18px; border-width:0 45px 35px; border-style:solid; border-color:transparent transparent red;}
/*六边形*/
.hexagon { width:100px; height:55px; background:red; position:relative;}
.hexagon:before { content:""; position:absolute; top:-25px; left:0; width:0; height:0; border-left:50px solid transparent; border-right:50px solid transparent; border-bottom:25px solid red;}
.hexagon:after { content:""; position:absolute; bottom:-25px; left:0; width:0; height:0; border-left:50px solid transparent; border-right:50px solid transparent; border-top:25px solid red;}
/*八边形*/
.octagon { width:100px; height:100px; background:red; position:relative;}
.octagon:before { content:""; position:absolute; top:0; left:0; border-bottom:29px solid red; border-left:29px solid #eee; border-right:29px solid #eee; width:42px; height:0;}
.octagon:after { content:""; position:absolute; bottom:0; left:0; border-top:29px solid red; border-left:29px solid #eee; border-right:29px solid #eee; width:42px; height:0;}
/*爱心*/
.heart { position:relative; width:100px; height:90px;}
.heart:before { position:absolute; content:""; left:50px; top:0; width:50px; height:80px; background:red;
-moz-border-radius:50px 50px 0 0;
border-radius:50px 50px 0 0;
-webkit-transform: rotate(-45deg);
-moz-transform: rotate(-45deg);
-ms-transform: rotate(-45deg);
-o-transform: rotate(-45deg);
transform: rotate(-45deg);
-webkit-transform-origin:0 100%;
-moz-transform-origin:0 100%;
-ms-transform-origin:0 100%;
-o-transform-origin:0 100%;
transform-origin:0 100%; }
.heart:after { left:0; content:""; position:absolute; width:50px; height:80px;
background:red;
-moz-border-radius:50px 50px 0 0;
border-radius:50px 50px 0 0;
-webkit-transform: rotate(45deg);
-moz-transform: rotate(45deg);
-ms-transform: rotate(45deg);
-o-transform: rotate(45deg);
transform: rotate(45deg);
-webkit-transform-origin:100% 100%;
-moz-transform-origin:100% 100%;
-ms-transform-origin:100% 100%;
-o-transform-origin:100% 100%;
transform-origin :100% 100%; }
/*无穷大符号*/
.infinity { position:relative; width:212px; height:100px; }
.infinity:before { width:60px; height:60px; border:20px solid red; content:""; position:absolute;
-moz-border-radius:50px 50px 0 50px;
border-radius:50px 50px 0 50px;
-webkit-transform: rotate(-45deg);
-moz-transform: rotate(-45deg);
-ms-transform: rotate(-45deg);
-o-transform: rotate(-45deg);
transform: rotate(-45deg); }
.infinity:after { right:auto; width:60px; height:60px; border:20px solid red; content:""; position:absolute;
-moz-border-radius:50px 50px 50px 0;
border-radius:50px 50px 50px 0;
-webkit-transform: rotate(45deg);
-moz-transform: rotate(45deg);
-ms-transform: rotate(45deg);
-o-transform: rotate(45deg);
transform: rotate(45deg); }
/*鸡蛋*/
.egg { width:126px; height:180px; background-color:red;
-webkit-border-radius:63px 63px 63px 63px/108px 108px 72px72px;
border-radius:50% 50% 50% 50%/60% 60% 40% 40%; }
/*药丸*/
.pill { width:0px; height:0px; border-right:60px solid transparent; border-top:60px solid red; border-bottom:60px solid red;
border-top-left-radius:60px;
border-top-right-radius:60px;
border-bottom-left-radius:60px;
border-bottom-right-radius:60px; }
/*对话框*/
.talkbubble { width:120px; height:80px; background:red; position:relative;
-webkit-border-radius:10px;
-moz-border-radius:10px;
border-radius:10px;}
.talkbubble:before { content:""; position:absolute; right:100%; top:26px; width:0; height:0; border-top:13px solid transparent; border-right:26px solid red; border-bottom:13px solid transparent;}
/*钻石*/
.cut-diamond { border-style:solid; border-color:transparent transparent red transparent; border-width:0 25px 25px 25px; height:0; width:50px; position:relative; margin:20px 0 50px 0;}
.cut-diamond:after { content:""; position:absolute; top:25px; left:-25px; width:0; height:0; border-style:solid; border-color:red transparent transparent transparent; border-width:70px 50px 0 50px;}
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