From 33058f2b292b3a581333bdfb21b8f671898c5060 Mon Sep 17 00:00:00 2001 From: Peter Bengtsson Date: Tue, 8 Dec 2020 14:40:17 -0500 Subject: initial commit --- files/zh-cn/web/css/perspective-origin/index.html | 382 ++++++++++++++++++++++ 1 file changed, 382 insertions(+) create mode 100644 files/zh-cn/web/css/perspective-origin/index.html (limited to 'files/zh-cn/web/css/perspective-origin') diff --git a/files/zh-cn/web/css/perspective-origin/index.html b/files/zh-cn/web/css/perspective-origin/index.html new file mode 100644 index 0000000000..14843dc64d --- /dev/null +++ b/files/zh-cn/web/css/perspective-origin/index.html @@ -0,0 +1,382 @@ +--- +title: perspective-origin +slug: Web/CSS/perspective-origin +translation_of: Web/CSS/perspective-origin +--- +
{{CSSRef}}
+ +

CSS 属性 perspective-origin 指定了观察者的位置，用作 {{cssxref("perspective")}} 属性的消失点。

+ +
{{EmbedInteractiveExample("pages/css/perspective-origin.html")}}
+ + + +

语法

+ +
/* 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;
+
+ +

值

+ +
+
x-position
+
指定消失点的横坐标，其值有以下形式： +
    +
  • {{cssxref("<length-percentage>")}} 长度值或相对于元素宽度的百分比值，可为负值。
    • +
  • left, 关键字，0值的简记。
    • +
  • center, 关键字，50%的简记。
    • +
  • right, 关键字，100%的简记。
    • +
+
+
y-position
+
指定消失点的纵坐标，其值有以下形式： +
    +
  • {{cssxref("<length-percentage>")}} 长度值或相对于元素高度的百分比值，可为负值。
    • +
  • top, 关键字，0值的简记。
    • +
  • center, 关键字，50%的简记。
    • +
  • bottom, 关键字，100%的简记。
    • +
+
+
+ +

正式语法

+ +
{{csssyntax}}
+ +

举例

+ +

修改 perspective origin

+ +

这个例子展示了带有常用 perspective-origin 值的立方体。

+ +

结果

+ +

{{EmbedLiveSample('Changing_the_perspective_origin', '100%', 700)}}

+ +

HTML

+ +
<table>
+  <tbody>
+    <tr>
+      <th>
+        <code>perspective-origin: top left;</code>
+      </th>
+      <th>
+        <code>perspective-origin: top;</code>
+      </th>
+      <th>
+        <code>perspective-origin: top right;</code>
+      </th>
+    </tr>
+    <tr>
+      <td>
+        <div class="container">
+          <div class="cube potl">
+            <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 potm">
+            <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 potr">
+            <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-origin: left;</code>
+      </th>
+      <th>
+        <code>perspective-origin: 50% 50%;</code>
+      </th>
+      <th>
+        <code>perspective-origin: right;</code>
+      </th>
+    </tr>
+    <tr>
+      <td>
+        <div class="container">
+          <div class="cube poml">
+            <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 pomm">
+            <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 pomr">
+            <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-origin: bottom left;</code>
+      </th>
+      <th>
+        <code>perspective-origin: bottom;</code>
+      </th>
+      <th>
+        <code>perspective-origin: bottom right;</code>
+      </th>
+    </tr>
+    <tr>
+      <td>
+        <div class="container">
+          <div class="cube pobl">
+            <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 pobm">
+            <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 pobr">
+            <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>
+ +

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;
+}
+ +

规范

+ + + + + + + + + + + + + + + + +
SpecificationStatusComment
{{SpecName('CSS Transforms 2', '#perspective-origin-property', 'perspective-origin')}}{{Spec2('CSS Transforms 2')}}Initial definition.
+ +

{{cssinfo}}

+ +

浏览器兼容性

+ +
+ + +

{{Compat("css.properties.perspective-origin")}}

+
+ +

相关连接

+ + -- cgit v1.2.3-54-g00ecf