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author | Peter Bengtsson <mail@peterbe.com> | 2020-12-08 14:40:17 -0500 |
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committer | Peter Bengtsson <mail@peterbe.com> | 2020-12-08 14:40:17 -0500 |
commit | 33058f2b292b3a581333bdfb21b8f671898c5060 (patch) | |
tree | 51c3e392513ec574331b2d3f85c394445ea803c6 /files/zh-cn/web/css/perspective | |
parent | 8b66d724f7caf0157093fb09cfec8fbd0c6ad50a (diff) | |
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diff --git a/files/zh-cn/web/css/perspective/index.html b/files/zh-cn/web/css/perspective/index.html new file mode 100644 index 0000000000..9a34e9d980 --- /dev/null +++ b/files/zh-cn/web/css/perspective/index.html @@ -0,0 +1,253 @@ +--- +title: perspective +slug: Web/CSS/perspective +translation_of: Web/CSS/perspective +--- +<div>{{CSSRef}}</div> + +<p><span class="seoSummary"><a href="/en-US/docs/Web/CSS">CSS</a> 属性 <strong><code>perspective</code></strong>指定了观察者与 z=0 平面的距离,使具有三维位置变换的元素产生透视效果。</span> z>0 的三维元素比正常大,而 z<0 时则比正常小,大小程度由该属性的值决定。</p> + +<div>{{EmbedInteractiveExample("pages/css/perspective.html")}}</div> + + + +<p>三维元素在观察者后面的部分不会绘制出来,即 z 轴坐标值大于 <code>perspective</code> 属性值的部分。</p> + +<p>默认情况下,<em>消失点</em>位于元素的中心,但是可以通过设置 {{cssxref("perspective-origin")}} 属性来改变其位置。</p> + +<p>当该属性值不为 <code>0</code> 和 <code>none</code> 时,会创建新的 <a href="/en-US/docs/Web/CSS/CSS_Positioning/Understanding_z_index/The_stacking_context">层叠上下文</a>。在这种情况下,容器内元素的层叠关系像是使用了 <code>position: fixed</code> 一样。</p> + +<h2 id="语法">语法</h2> + +<pre class="brush: css">/* Keyword value */ +perspective: none; + +/* <length> values */ +perspective: 20px; +perspective: 3.5em; + +/* Global values */ +perspective: inherit; +perspective: initial; +perspective: unset; +</pre> + +<h3 id="值">值</h3> + +<dl> + <dt><code>none</code></dt> + <dd>没有应用 perspective 样式时的默认值.</dd> + <dt><code><length></code></dt> + <dd>{{cssxref("<length>")}} 指定观察者距离 z=0 平面的距离,为元素及其内容应用透视变换。当值为0或负值时,无透视变换。</dd> +</dl> + +<h3 id="标准语法">标准语法</h3> + +<pre class="syntaxbox">{{csssyntax}}</pre> + +<h2 id="举例">举例</h2> + +<h3 id="设置视角">设置视角</h3> + +<p>此示例显示了一个立方体,其 perspective 设置为不同的值。立方体的收缩由 {{ cssxref("perspective") }} 属性定义。它的值越小,视角越深。</p> + +<h4 id="Result">Result</h4> + +<p>{{EmbedLiveSample('设置视角', 660, 700)}}</p> + +<h4 id="HTML">HTML</h4> + +<p>下面的 HTML 创建了同一个立方体的四个副本,perspective 设置为不同的值。</p> + +<pre class="brush: html"><table> + <tbody> + <tr> + <th><code>perspective: 250px;</code> + </th> + <th><code>perspective: 350px;</code> + </th> + </tr> + <tr> + <td> + <div class="container"> + <div class="cube pers250"> + <div class="face front">1</div> + <div class="face back">2</div> + <div class="face right">3</div> + <div class="face left">4</div> + <div class="face top">5</div> + <div class="face bottom">6</div> + </div> + </div> + </td> + <td> + <div class="container"> + <div class="cube pers350"> + <div class="face front">1</div> + <div class="face back">2</div> + <div class="face right">3</div> + <div class="face left">4</div> + <div class="face top">5</div> + <div class="face bottom">6</div> + </div> + </div> + </td> + </tr> + <tr> + <th><code>perspective: 500px;</code> + </th> + <th><code>perspective: 650px;</code> + </th> + </tr> + <tr> + <td> + <div class="container"> + <div class="cube pers500"> + <div class="face front">1</div> + <div class="face back">2</div> + <div class="face right">3</div> + <div class="face left">4</div> + <div class="face top">5</div> + <div class="face bottom">6</div> + </div> + </div> + </td> + <td> + <div class="container"> + <div class="cube pers650"> + <div class="face front">1</div> + <div class="face back">2</div> + <div class="face right">3</div> + <div class="face left">4</div> + <div class="face top">5</div> + <div class="face bottom">6</div> + </div> + </div> + </td> + </tr> + </tbody> +</table> +</pre> + +<h4 id="CSS">CSS</h4> + +<p>CSS 建立了不同透视距离的 class,还包括容器盒、立方体本身以及它的每个面的 class。</p> + +<pre class="brush: css">/* Shorthand classes for different perspective values */ +.pers250 { + perspective: 250px; +} + +.pers350 { + perspective: 350px; +} + +.pers500 { + perspective: 500px; +} + +.pers650 { + perspective: 650px; +} + +/* Define the container div, the cube div, and a generic face */ +.container { + width: 200px; + height: 200px; + margin: 75px 0 0 75px; + border: none; +} + +.cube { + width: 100%; + height: 100%; + backface-visibility: visible; + perspective-origin: 150% 150%; + 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); +} + +.back { + background: rgba(0, 255, 0, 1); + color: black; + transform: rotateY(180deg) translateZ(50px); +} + +.right { + background: rgba(196, 0, 0, 0.7); + transform: rotateY(90deg) translateZ(50px); +} + +.left { + background: rgba(0, 0, 196, 0.7); + transform: rotateY(-90deg) translateZ(50px); +} + +.top { + background: rgba(196, 196, 0, 0.7); + transform: rotateX(90deg) translateZ(50px); +} + +.bottom { + background: rgba(196, 0, 196, 0.7); + 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', '#propdef-perspective', 'perspective')}}</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> + + + +<p>{{Compat("css.properties.perspective")}}</p> + +<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> |