From 33058f2b292b3a581333bdfb21b8f671898c5060 Mon Sep 17 00:00:00 2001
From: Peter Bengtsson <mail@peterbe.com>
Date: Tue, 8 Dec 2020 14:40:17 -0500
Subject: initial commit

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+---
+title: perspective()
+slug: Web/CSS/transform-function/perspective()
+translation_of: Web/CSS/transform-function/perspective()
+---
+<div>{{CSSRef}}</div>
+
+<div>透视函数定义了到z=0的坐标轴，使用者能够得到3D定位元素的透视，每个3D元素在Z轴的位置大于零意味着离使用者更近，因此会变得更大，同理当元素Z周小于零时会变得ge</div>
+
+<p>T更小，变化的幅度决定于属性值的变化大小 </p>
+
+<h2 id="语法">语法</h2>
+
+<pre class="syntaxbox notranslate">perspective(l)
+</pre>
+
+<h2 id="参数">参数</h2>
+
+<dl>
+ <dt><em>l</em></dt>
+ <dd>这个{{cssxref("&lt;length&gt;")}} 得到的是距离0坐标的距离. 被用作提供一个透视渐变属性给某个元素. 如果这个值是0或者不合法的值，将不会产生透视的变化.</dd>
+</dl>
+
+<table class="standard-table">
+ <thead>
+  <tr>
+   <th scope="col">Cartesian coordinates on ℝ<sup>2</sup></th>
+   <th scope="col">Homogeneous coordinates on ℝℙ<sup>2</sup></th>
+   <th scope="col">Cartesian coordinates on ℝ<sup>3</sup></th>
+   <th scope="col">Homogeneous coordinates on ℝℙ<sup>3</sup></th>
+  </tr>
+ </thead>
+ <tbody>
+  <tr>
+   <td colspan="2" rowspan="2">
+    <p>这个属性变化提供了一个3D空间，并且不会变成平面类型</p>
+   </td>
+   <td colspan="1" rowspan="2">A perspective is not a linear transform in ℝ<sup>3</sup> and cannot be represented using a matrix in the Cartesian coordinates system.</td>
+   <td colspan="1" rowspan="2"><math> <mfenced><mtable><mtr>1<mtd>0</mtd><mtd>0</mtd><mtd>0</mtd></mtr><mtr>0<mtd>1</mtd><mtd>0</mtd><mtd>0</mtd></mtr><mtr><mtd>0</mtd><mtd>0</mtd><mtd>1</mtd><mtd>0</mtd></mtr><mtr><mtd>0</mtd><mtd>0</mtd><mtd><mo>−</mo>1<mo>/</mo>d</mtd><mtd>1</mtd></mtr></mtable> </mfenced> </math></td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="Examples">Examples</h2>
+
+<p>TBD</p>
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