Home Web Front-end H5 Tutorial SVG基础|绘制SVG圆形和椭圆形

SVG基础|绘制SVG圆形和椭圆形

May 17, 2016 am 09:07 AM
round Oval

SVG 元素用于绘制一个圆形。元素则用于绘制椭圆形。我们先从圆形说起,下面是一个绘制SVG圆形的例子。

<svg xmlns="http://www.w3.org/2000/svg">
  <circle cx="40" cy="40" r="24" style="stroke:#006600; fill:#00cc00"/>
</svg>
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上面代码的返回结果如下:

946.png

cx和cy表示圆心的坐标,r属性则是圆的半径。

圆形描边

你可以在样式中使用stroke属性来设置SVG圆形的描边属性。在上面的例子中,圆形的描边被设置为暗绿色。除了描边颜色,你还可以使用stroke-width设置描边的宽度。看下面的例子

<circle cx="40" cy="40" r="24"
    style="stroke:#006600;
           stroke-width: 3;
           fill:#00cc00"/>
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上面代码的返回结果如下:

947.png

注意这个例子中圆的描边宽度要比上面例子的宽。

你还可以使用stroke-dasharray属性来实现圆形的虚线描边效果。

<circle cx="40" cy="40" r="24"
    style="stroke:#006600;
           stroke-width: 3;
           stroke-dasharray: 10 5;
           fill:#00cc00"/>
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上面代码的返回结果如下:

948.png

最后,你也可以将圆形的描边移除,只需要将它设置为none即可。

<circle cx="40" cy="40" r="24"
    style="stroke: none;
           fill:#00cc00"/>
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上面代码的返回结果如下:

949.png

填充圆形

fill属性可以控制SVG圆形的填充色。设置为none则不会填充任何颜色。

<circle cx="40" cy="40" r="24"
    style="stroke: #00600;
           fill:none"/>
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上面代码的返回结果如下:

950.png

下面是一个填充了紫色的圆形。

<circle cx="40" cy="40" r="24"
    style="stroke: #660066;
           fill: #cc3399"/>
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951.png

最后,你可以使用fill-opacity属性来设置填充色的透明度。下面的例子中绘制了两个部分叠加的圆形,上面圆形的填充透明度被设置为50%

<circle cx="40" cy="40" r="24"
    style="stroke: #660000;
           fill: #cc0000" />
<circle cx="64" cy="40" r="24"
    style="stroke: #000066;
           fill: #0000cc;
           fill-opacity: 0.5"/>
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上面代码的返回结果如下:

952.png

SVG椭圆

SVG椭圆和圆形类似,只是它的半径不相等,它的半径用rx和ry属性来表示。看下面的例子。

<svg xmlns="http://www.w3.org/2000/svg"> 
  <ellipse cx="40" cy="40" rx="30" ry="15"
           style="stroke:#006600; fill:#00cc00"/>
</svg>
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上面代码的返回结果如下:

953.png

SVG椭圆的描边

同样,你可以使用stroke-width属性来设置椭圆的描边宽度。

<ellipse cx="50" cy="50" rx="40" ry="30"
         style="stroke: #ff0000;
               stroke-width: 5;
               fill: none;
        "/>
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上面代码的返回结果如下:

954.png

你也可以将椭圆的描边制作为虚线。下面的例子中虚线的长度为10像素,两个虚线之间的间距为5像素。

<ellipse cx="50" cy="50" rx="40" ry="30"
         style="stroke: #ff0000;
               stroke-width: 5;
               stroke-dasharray: 10 5;
               fill: none;
        "/>
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955.png

另外,你还可以使用stroke-opacity来设置描边的透明度。

<ellipse cx="50" cy="50" rx="40" ry="30"
         style="stroke: #ff0000;
               stroke-width: 5;
               fill: none;
        "/>
 
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上面代码的返回结果如下:

956.png

SVG椭圆的填充色

同样还是使用fill属性来设置SVG椭圆的填充色。

<ellipse cx="50" cy="50" rx="40" ry="30"
         style="stroke: #ff0000;
               stroke-width: 5;
               fill: #ff6666;
        "/>
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957.png

和SVG圆形一样,椭圆也可以设置填充的透明度。

<ellipse cx="50" cy="50" rx="40" ry="30"
         style="stroke: #ff0000;
               stroke-width: 5;
               fill: none;
        "/>
 
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958.png

以上就是SVG基础|绘制SVG圆形和椭圆形的内容,更多相关内容请关注PHP中文网(www.php.cn)!


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