files/zh-cn/web/svg/element/mpath/index.html


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---
title: mpath
slug: Web/SVG/Element/mpath
tags:
  - SVG
  - SVG动画
  - 元素
  - 参考
  - 需要兼容性表
  - 需要示例
translation_of: Web/SVG/Element/mpath
---
<div>{{SVGRef}}</div>

<p>{{ SVGElement("animateMotion") }} 元素的<code>mpath</code>子元素使{{ SVGElement("animateMotion") }} 元素能够引用一个外部的{{ SVGElement("path") }}元素作为运动路径的定义。</p>

<h2 id="用法">用法</h2>

<p>{{svginfo}}</p>

<h2 id="示例">示例</h2>

<pre class="brush: html">&lt;svg width="100%" height="100%"  viewBox="0 0 500 300"
     xmlns="http://www.w3.org/2000/svg"
     xmlns:xlink="http://www.w3.org/1999/xlink" &gt;

  &lt;rect x="1" y="1" width="498" height="298"
        fill="none" stroke="blue" stroke-width="2" /&gt;

  &lt;!-- Draw the outline of the motion path in blue, along
          with three small circles at the start, middle and end. --&gt;
  &lt;path id="path1" d="M100,250 C 100,50 400,50 400,250"
        fill="none" stroke="blue" stroke-width="7.06"  /&gt;
  &lt;circle cx="100" cy="250" r="17.64" fill="blue"  /&gt;
  &lt;circle cx="250" cy="100" r="17.64" fill="blue"  /&gt;
  &lt;circle cx="400" cy="250" r="17.64" fill="blue"  /&gt;

  &lt;!-- Here is a triangle which will be moved about the motion path.
       It is defined with an upright orientation with the base of
       the triangle centered horizontally just above the origin. --&gt;
  &lt;path d="M-25,-12.5 L25,-12.5 L 0,-87.5 z"
        fill="yellow" stroke="red" stroke-width="7.06"  &gt;
    &lt;!-- Define the motion path animation --&gt;
    &lt;animateMotion dur="6s" repeatCount="indefinite" rotate="auto" &gt;
       &lt;mpath xlink:href="#path1"/&gt;
    &lt;/animateMotion&gt;
  &lt;/path&gt;
&lt;/svg&gt;
</pre>

<p>实时输出：</p>

<p>{{EmbedLiveSample("Example",250,165)}}</p>

<h2 id="属性">属性</h2>

<h3 id="全局属性">全局属性</h3>

<ul>
 <li><a href="/en/SVG/Attribute#Core" title="en/SVG/Attribute#Core">核心属性</a> »</li>
 <li><a href="/en/SVG/Attribute#XLink" title="en/SVG/Attribute#XLink">Xlink属性</a> »</li>
 <li>{{ SVGAttr("externalResourcesRequired") }}</li>
</ul>

<h3 id="专有属性">专有属性</h3>

<ul>
 <li>{{ SVGAttr("xlink:href") }}</li>
</ul>

<h2 id="DOM_接口">DOM 接口</h2>

<p>该元素实现了<code><a href="/en/DOM/SVGMPathElement" title="en/DOM/SVGMPathElement">SVGMPathElement</a></code>接口。</p>

<h2 id="相关的内容">相关的内容</h2>

<ul>
 <li>{{ SVGElement("animateMotion") }}</li>
</ul>