css3简单图形绘制教程

下面就几个小案例来教大家如何用css绘制一些图形：

<style>
    #triangle {        width: 0;        border-style: solid;        border-width: 50px 50px 50px 50px;        border-color: red blue orange gray;
    }</style><div id="triangle"></div>

效果如图：

<style>
    #triangle2 {        width: 0;        border-style: solid;        border-width: 50px 50px 50px 50px;        border-color: red red grey grey;
    }</style><div id="triangle2"></div>

效果如图：

<style>
    #triangle3 {        width: 0;        border-top: 60px solid transparent;        border-right: 100px solid transparent;        border-bottom: 80px solid red;
    }</style><div id="triangle3"></div>

效果如图：

<style>
    #triangle4 {        width: 0;        border-left: 50px solid transparent;        border-right: 50px solid transparent;        border-bottom: 100px solid red;
    }</style><div id="triangle4"></div>

效果如图：

绘制心形

<style>
    #heart {        float: left;        width: 100px;        height: 90px;        position: relative;
    }    #heart:before,#heart:after {        position: absolute;        top: 0;        content: '';        width: 50px;        height: 80px;        background: red;        border-radius: 25px 25px 0 0;
    }    #heart:before {        left: 14px;        transform: rotate(-45deg);
    }    #heart:after {        left: 36px;        transform: rotate(45deg);
    }</style><div id="heart"></div>

效果如图：

绘制箭头

<style>
    #arrow {        margin-top: 105px;        float: left;        width: 0;        border-left: 30px solid transparent;        border-right: 30px solid transparent;        border-top: 60px solid red;        position: relative;
    }    #arrow:before,#arrow:after {        position: absolute;        content: '';
    }    #arrow:before {        border-left: 30px solid transparent;        border-right: 30px solid transparent;        border-top: 20px solid #fff;        left: -30px;        top: -61px;
    }    #arrow:after {        height: 120px;        border-left: 2px solid red;        border-right: 2px solid red;        left: -2px;        top: -161px;
    }</style><div id="arrow"></div>

效果如图：

绘制五角星

<style>
    #star-five {        margin: 75px 0 55px 0;        float: left;        width: 0;        height: 0;        border-top: 66px solid red;        border-left: 100px solid transparent;        border-right: 100px solid transparent;        position: relative;
    }    #star-five:before,#star-five:after {        position: absolute;        content: '';        border-top: 66px solid red;        border-left: 100px solid transparent;        border-right: 100px solid transparent;        top: -66px;        left: -100px;
    }    #star-five:before {        transform: rotate(-72deg);
    }    #star-five:after {        transform: rotate(72deg);
    }</style><div id="star-five"></div>

效果如图：

绘制冒泡框/提示框

<style>
    #prompt {        float: left;        width: 200px;        height: 100px;        margin: 20px 0 40px;        border-radius: 20px;        background: #669;        position: relative;
    }    #prompt:after {        position: absolute;        content: "";        width: 50px;        height: 120px;        border: 0 solid transparent;        border-right: 30px solid #669;        border-radius: 0 0 50px 0;        top: 0;        left: 0;
    }</style><div id="prompt"></div>

效果如图：

绘制气球

<style>
   #balloon {        float: left;        width: 160px;        height: 160px;        background: #faf9f9;      
     border-radius: 160px 160px 64px 160px;        transform: rotate(45deg);      
       box-shadow: 0 0 100px 0 rgba(243,98,122,1) inset, 20px 20px 20px rgba(243,98,122,0.3);        position: relative;
   }    #balloon:after {        position: absolute;        content: '';     
      border: 8px solid transparent;        border-right-color: rgba(243,98,122,0.88);    
          transform: rotate(45deg);        border-radius: 16px;     
             bottom: -2px;        right: -2px;
   }</style><div id="balloon"></div>

效果如图：

绘制阴阳八卦

<style>
    #yin-yang {            float: left;            width: 48px;            height: 96px;            background-color: #fff;            border-style: solid;            border-color: #000;            border-width: 2px 50px 2px 2px;            border-radius: 50%;            -webkit-animation: Rotate 6s linear infinite; /*旋转*/
            position: relative;
        }        #yin-yang:before,#yin-yang:after {            position: absolute;            content: '';
        }        #yin-yang:before {            width: 12px;            height: 12px;            background: #fff;            border: 18px solid #000;            border-radius: 50%;            top: 0;            left: 50%;
        }        #yin-yang:after {            width: 12px;            height: 12px;            background: #000;            border: 18px solid #fff;            border-radius: 50%;            top: 50%;            left: 50%;
        }
        @-webkit-keyframes Rotate {
            0%{transform: rotate(360deg)}
            100%{transform: rotate(0deg)}
        }
        @keyframes Rotate {
            0%{transform: rotate(360deg)}
            100%{transform: rotate(0deg)}
        }</style><div id="yin-yang"></div>

效果如图：

CSS为HTML标记语言提供了一种样式描述，定义了其中元素的显示方式。CSS在Web设计领域是一个突破。利用它可以实现修改一个小的样式更新与之相关的所有页面元素。看到上面绘制的小图形，是不是绝得很神奇？这些教程很简单很适合初学者来学习哦。

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