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authorPeter Bengtsson <mail@peterbe.com>2020-12-08 14:40:17 -0500
committerPeter Bengtsson <mail@peterbe.com>2020-12-08 14:40:17 -0500
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+---
+title: perspective-origin
+slug: Web/CSS/perspective-origin
+translation_of: Web/CSS/perspective-origin
+---
+<div>{{CSSRef}}</div>
+
+<p><a href="/en-US/docs/CSS">CSS</a> 属性 <strong><code>perspective-origin</code></strong> 指定了观察者的位置,用作 {{cssxref("perspective")}} 属性的消失点。</p>
+
+<div>{{EmbedInteractiveExample("pages/css/perspective-origin.html")}}</div>
+
+
+
+<h2 id="语法">语法</h2>
+
+<pre class="brush:css no-line-numbers">/* One-value syntax */
+perspective-origin: x-position;
+
+/* Two-value syntax */
+perspective-origin: x-position y-position;
+
+/* When both x-position and y-position are keywords,
+ the following is also valid */
+perspective-origin: y-position x-position;
+
+/* Global values */
+perspective-origin: inherit;
+perspective-origin: initial;
+perspective-origin: unset;
+</pre>
+
+<h3 id="值">值</h3>
+
+<dl>
+ <dt><em>x-position</em></dt>
+ <dd>指定<em>消失点</em>的横坐标,其值有以下形式:
+ <ul>
+ <li>{{cssxref("&lt;length-percentage&gt;")}} 长度值或相对于元素宽度的百分比值,可为负值。</li>
+ <li><code>left</code>, 关键字,0值的简记。</li>
+ <li><code>center</code>, 关键字,50%的简记。</li>
+ <li><code>right</code>, 关键字,100%的简记。</li>
+ </ul>
+ </dd>
+ <dt><em>y-position</em></dt>
+ <dd>指定<em>消失点</em>的纵坐标,其值有以下形式:
+ <ul>
+ <li>{{cssxref("&lt;length-percentage&gt;")}} 长度值或相对于元素高度的百分比值,可为负值。</li>
+ <li><code>top</code>, 关键字,0值的简记。</li>
+ <li><code>center</code>, 关键字,50%的简记。</li>
+ <li><code>bottom</code>, 关键字,100%的简记。</li>
+ </ul>
+ </dd>
+</dl>
+
+<h3 id="正式语法">正式语法</h3>
+
+<pre class="syntaxbox">{{csssyntax}}</pre>
+
+<h2 id="举例">举例</h2>
+
+<h3 id="修改_perspective_origin">修改 perspective origin</h3>
+
+<p>这个例子展示了带有常用 <code>perspective-origin</code> 值的立方体。</p>
+
+<h4 id="结果">结果</h4>
+
+<p>{{EmbedLiveSample('Changing_the_perspective_origin', '100%', 700)}}</p>
+
+<h4 id="HTML">HTML</h4>
+
+<pre class="brush: html">&lt;table&gt;
+ &lt;tbody&gt;
+ &lt;tr&gt;
+ &lt;th&gt;
+ &lt;code&gt;perspective-origin: top left;&lt;/code&gt;
+ &lt;/th&gt;
+ &lt;th&gt;
+ &lt;code&gt;perspective-origin: top;&lt;/code&gt;
+ &lt;/th&gt;
+ &lt;th&gt;
+ &lt;code&gt;perspective-origin: top right;&lt;/code&gt;
+ &lt;/th&gt;
+ &lt;/tr&gt;
+ &lt;tr&gt;
+ &lt;td&gt;
+ &lt;div class="container"&gt;
+ &lt;div class="cube potl"&gt;
+ &lt;div class="face front"&gt;1&lt;/div&gt;
+ &lt;div class="face back"&gt;2&lt;/div&gt;
+ &lt;div class="face right"&gt;3&lt;/div&gt;
+ &lt;div class="face left"&gt;4&lt;/div&gt;
+ &lt;div class="face top"&gt;5&lt;/div&gt;
+ &lt;div class="face bottom"&gt;6&lt;/div&gt;
+ &lt;/div&gt;
+ &lt;/div&gt;
+ &lt;/td&gt;
+ &lt;td&gt;
+ &lt;div class="container"&gt;
+ &lt;div class="cube potm"&gt;
+ &lt;div class="face front"&gt;1&lt;/div&gt;
+ &lt;div class="face back"&gt;2&lt;/div&gt;
+ &lt;div class="face right"&gt;3&lt;/div&gt;
+ &lt;div class="face left"&gt;4&lt;/div&gt;
+ &lt;div class="face top"&gt;5&lt;/div&gt;
+ &lt;div class="face bottom"&gt;6&lt;/div&gt;
+ &lt;/div&gt;
+ &lt;/div&gt;
+ &lt;/td&gt;
+ &lt;td&gt;
+ &lt;div class="container"&gt;
+ &lt;div class="cube potr"&gt;
+ &lt;div class="face front"&gt;1&lt;/div&gt;
+ &lt;div class="face back"&gt;2&lt;/div&gt;
+ &lt;div class="face right"&gt;3&lt;/div&gt;
+ &lt;div class="face left"&gt;4&lt;/div&gt;
+ &lt;div class="face top"&gt;5&lt;/div&gt;
+ &lt;div class="face bottom"&gt;6&lt;/div&gt;
+ &lt;/div&gt;
+ &lt;/div&gt;
+ &lt;/td&gt;
+ &lt;/tr&gt;
+ &lt;tr&gt;
+ &lt;th&gt;
+ &lt;code&gt;perspective-origin: left;&lt;/code&gt;
+ &lt;/th&gt;
+ &lt;th&gt;
+ &lt;code&gt;perspective-origin: 50% 50%;&lt;/code&gt;
+ &lt;/th&gt;
+ &lt;th&gt;
+ &lt;code&gt;perspective-origin: right;&lt;/code&gt;
+ &lt;/th&gt;
+ &lt;/tr&gt;
+ &lt;tr&gt;
+ &lt;td&gt;
+ &lt;div class="container"&gt;
+ &lt;div class="cube poml"&gt;
+ &lt;div class="face front"&gt;1&lt;/div&gt;
+ &lt;div class="face back"&gt;2&lt;/div&gt;
+ &lt;div class="face right"&gt;3&lt;/div&gt;
+ &lt;div class="face left"&gt;4&lt;/div&gt;
+ &lt;div class="face top"&gt;5&lt;/div&gt;
+ &lt;div class="face bottom"&gt;6&lt;/div&gt;
+ &lt;/div&gt;
+ &lt;/div&gt;
+ &lt;/td&gt;
+ &lt;td&gt;
+ &lt;div class="container"&gt;
+ &lt;div class="cube pomm"&gt;
+ &lt;div class="face front"&gt;1&lt;/div&gt;
+ &lt;div class="face back"&gt;2&lt;/div&gt;
+ &lt;div class="face right"&gt;3&lt;/div&gt;
+ &lt;div class="face left"&gt;4&lt;/div&gt;
+ &lt;div class="face top"&gt;5&lt;/div&gt;
+ &lt;div class="face bottom"&gt;6&lt;/div&gt;
+ &lt;/div&gt;
+ &lt;/div&gt;
+ &lt;/td&gt;
+ &lt;td&gt;
+ &lt;div class="container"&gt;
+ &lt;div class="cube pomr"&gt;
+ &lt;div class="face front"&gt;1&lt;/div&gt;
+ &lt;div class="face back"&gt;2&lt;/div&gt;
+ &lt;div class="face right"&gt;3&lt;/div&gt;
+ &lt;div class="face left"&gt;4&lt;/div&gt;
+ &lt;div class="face top"&gt;5&lt;/div&gt;
+ &lt;div class="face bottom"&gt;6&lt;/div&gt;
+ &lt;/div&gt;
+ &lt;/div&gt;
+ &lt;/td&gt;
+ &lt;/tr&gt;
+ &lt;tr&gt;
+ &lt;th&gt;
+ &lt;code&gt;perspective-origin: bottom left;&lt;/code&gt;
+ &lt;/th&gt;
+ &lt;th&gt;
+ &lt;code&gt;perspective-origin: bottom;&lt;/code&gt;
+ &lt;/th&gt;
+ &lt;th&gt;
+ &lt;code&gt;perspective-origin: bottom right;&lt;/code&gt;
+ &lt;/th&gt;
+ &lt;/tr&gt;
+ &lt;tr&gt;
+ &lt;td&gt;
+ &lt;div class="container"&gt;
+ &lt;div class="cube pobl"&gt;
+ &lt;div class="face front"&gt;1&lt;/div&gt;
+ &lt;div class="face back"&gt;2&lt;/div&gt;
+ &lt;div class="face right"&gt;3&lt;/div&gt;
+ &lt;div class="face left"&gt;4&lt;/div&gt;
+ &lt;div class="face top"&gt;5&lt;/div&gt;
+ &lt;div class="face bottom"&gt;6&lt;/div&gt;
+ &lt;/div&gt;
+ &lt;/div&gt;
+ &lt;/td&gt;
+ &lt;td&gt;
+ &lt;div class="container"&gt;
+ &lt;div class="cube pobm"&gt;
+ &lt;div class="face front"&gt;1&lt;/div&gt;
+ &lt;div class="face back"&gt;2&lt;/div&gt;
+ &lt;div class="face right"&gt;3&lt;/div&gt;
+ &lt;div class="face left"&gt;4&lt;/div&gt;
+ &lt;div class="face top"&gt;5&lt;/div&gt;
+ &lt;div class="face bottom"&gt;6&lt;/div&gt;
+ &lt;/div&gt;
+ &lt;/div&gt;
+ &lt;/td&gt;
+ &lt;td&gt;
+ &lt;div class="container"&gt;
+ &lt;div class="cube pobr"&gt;
+ &lt;div class="face front"&gt;1&lt;/div&gt;
+ &lt;div class="face back"&gt;2&lt;/div&gt;
+ &lt;div class="face right"&gt;3&lt;/div&gt;
+ &lt;div class="face left"&gt;4&lt;/div&gt;
+ &lt;div class="face top"&gt;5&lt;/div&gt;
+ &lt;div class="face bottom"&gt;6&lt;/div&gt;
+ &lt;/div&gt;
+ &lt;/div&gt;
+ &lt;/td&gt;
+ &lt;/tr&gt;
+ &lt;/tbody&gt;
+&lt;/table&gt;</pre>
+
+<h4 id="CSS">CSS</h4>
+
+<pre class="brush: css">/* Shorthand classes for perspective-origin values */
+.potl {
+ perspective-origin: top left;
+ -webkit-perspective-origin: top left;
+}
+
+.potm {
+ perspective-origin: top;
+ -webkit-perspective-origin: top;
+}
+
+.potr {
+ perspective-origin: top right;
+ -webkit-perspective-origin: top right;
+}
+
+.poml {
+ perspective-origin: left;
+ -webkit-perspective-origin: left;
+}
+
+.pomm {
+ perspective-origin: 50% 50%;
+ -webkit-perspective-origin: 50% 50%;
+}
+
+.pomr {
+ perspective-origin: right;
+ -webkit-perspective-origin: right;
+}
+
+.pobl {
+ perspective-origin: bottom left;
+ -webkit-perspective-origin: bottom left;
+}
+
+.pobm {
+ perspective-origin: bottom;
+ -webkit-perspective-origin: bottom;
+}
+
+.pobr {
+ perspective-origin: bottom right;
+ -webkit-perspective-origin: bottom right;
+}
+
+/* Define the container div, the cube div, and a generic face */
+.container {
+ width: 100px;
+ height: 100px;
+ margin: 24px;
+ border: none;
+}
+
+.cube {
+ width: 100%;
+ height: 100%;
+ backface-visibility: visible;
+ perspective: 300px;
+ transform-style: preserve-3d;
+ -webkit-backface-visibility: visible;
+ -webkit-perspective: 300px;
+ -webkit-transform-style: preserve-3d;
+}
+
+.face {
+ display: block;
+ position: absolute;
+ width: 100px;
+ height: 100px;
+ border: none;
+ line-height: 100px;
+ font-family: sans-serif;
+ font-size: 60px;
+ color: white;
+ text-align: center;
+}
+
+/* Define each face based on direction */
+.front {
+ background: rgba(0, 0, 0, 0.3);
+ transform: translateZ(50px);
+ -webkit-transform: translateZ(50px);
+}
+
+.back {
+ background: rgba(0, 255, 0, 1);
+ color: black;
+ transform: rotateY(180deg) translateZ(50px);
+ -webkit-transform: rotateY(180deg) translateZ(50px);
+}
+
+.right {
+ background: rgba(196, 0, 0, 0.7);
+ transform: rotateY(90deg) translateZ(50px);
+ -webkit-transform: rotateY(90deg) translateZ(50px);
+}
+
+.left {
+ background: rgba(0, 0, 196, 0.7);
+ transform: rotateY(-90deg) translateZ(50px);
+ -webkit-transform: rotateY(-90deg) translateZ(50px);
+}
+
+.top {
+ background: rgba(196, 196, 0, 0.7);
+ transform: rotateX(90deg) translateZ(50px);
+ -webkit-transform: rotateX(90deg) translateZ(50px)
+}
+
+.bottom {
+ background: rgba(196, 0, 196, 0.7);
+ transform: rotateX(-90deg) translateZ(50px);
+ -webkit-transform: rotateX(-90deg) translateZ(50px);
+}
+
+/* Make the table a little nicer */
+th, p, td {
+ background-color: #EEEEEE;
+ padding: 10px;
+ font-family: sans-serif;
+ text-align: left;
+}</pre>
+
+<h2 id="规范">规范</h2>
+
+<table class="standard-table">
+ <thead>
+ <tr>
+ <th scope="col">Specification</th>
+ <th scope="col">Status</th>
+ <th scope="col">Comment</th>
+ </tr>
+ </thead>
+ <tbody>
+ <tr>
+ <td>{{SpecName('CSS Transforms 2', '#perspective-origin-property', 'perspective-origin')}}</td>
+ <td>{{Spec2('CSS Transforms 2')}}</td>
+ <td>Initial definition.</td>
+ </tr>
+ </tbody>
+</table>
+
+<p>{{cssinfo}}</p>
+
+<h2 id="浏览器兼容性">浏览器兼容性</h2>
+
+<div>
+
+
+<p>{{Compat("css.properties.perspective-origin")}}</p>
+</div>
+
+<h2 id="相关连接">相关连接</h2>
+
+<ul>
+ <li><a href="/en-US/docs/Web/CSS/CSS_Transforms/Using_CSS_transforms">Using CSS Transforms</a></li>
+</ul>