From 218934fa2ed1c702a6d3923d2aa2cc6b43c48684 Mon Sep 17 00:00:00 2001 From: Peter Bengtsson Date: Tue, 8 Dec 2020 14:43:23 -0500 Subject: initial commit --- .../transform-function/perspective()/index.html | 153 +++++++++++++++++++++ 1 file changed, 153 insertions(+) create mode 100644 files/vi/web/css/transform-function/perspective()/index.html (limited to 'files/vi/web/css/transform-function/perspective()/index.html') diff --git a/files/vi/web/css/transform-function/perspective()/index.html b/files/vi/web/css/transform-function/perspective()/index.html new file mode 100644 index 0000000000..a69e46e094 --- /dev/null +++ b/files/vi/web/css/transform-function/perspective()/index.html @@ -0,0 +1,153 @@ +--- +title: perspective() +slug: Web/CSS/transform-function/perspective() +translation_of: Web/CSS/transform-function/perspective() +--- +
{{CSSRef}}
+ +

The perspective() CSS function defines a transformation that sets the distance between the user and the z=0 plane, the perspective from which the viewer would be if the 2-dimensional interface were 3-dimensional. Its result is a {{cssxref("<transform-function>")}} data type.

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

The perspective() transform function is part of the {{cssxref('transform')}} value applied on the element being transformed. This differs from the {{cssxref('perspective')}} and {{cssxref('perspective-origin')}} properties which are attached to the parent of a child transformed in 3-dimensional space.

+ +

Syntax

+ +

The perspective distance used by perspective() is specified by a {{cssxref("<length>")}} value, which represents the distance between the user and the z=0 plane. The z=0 plane is the plane where everything appears in a 2-dimensional view, or the screen. A positive value makes the element appear closer to the user than the rest of the interface, a negative value farther. The greater the value, the further away the perspective of the user is.

+ +
perspective(d)
+
+ +

Values

+ +
+
d
+
Is a {{cssxref("<length>")}} representing the distance from the user to the z=0 plane. If it is 0 or a negative value, no perspective transform is applied.
+
+ + + + + + + + + + + + + + + + + +
Cartesian coordinates on ℝ2Homogeneous coordinates on ℝℙ2Cartesian coordinates on ℝ3Homogeneous coordinates on ℝℙ3
+

This transformation applies to the 3D space and can't be represented on the plane.

+ 		This transformation is not a linear transformation in ℝ3, and can't be represented using a Cartesian-coordinate matrix. 10000100001000−1/d1
+ +

Examples

+ +

HTML

+ +
<p>Without perspective:</p>
+<div class="no-perspective-box">
+  <div class="face front">A</div>
+  <div class="face top">B</div>
+  <div class="face left">C</div>
+</div>
+
+<p>With perspective (9cm):</p>
+<div class="perspective-box-far">
+  <div class="face front">A</div>
+  <div class="face top">B</div>
+  <div class="face left">C</div>
+</div>
+
+<p>With perspective (4cm):</p>
+<div class="perspective-box-closer">
+  <div class="face front">A</div>
+  <div class="face top">B</div>
+  <div class="face left">C</div>
+</div>
+
+ +

CSS

+ +
.face {
+  position: absolute;
+  width: 100px;
+  height: 100px;
+  line-height: 100px;
+  font-size: 100px;
+  text-align: center;
+}
+
+p + div {
+  width: 100px;
+  height: 100px;
+  transform-style: preserve-3d;
+  margin-left: 100px;
+}
+.no-perspective-box {
+  transform: rotateX(-15deg) rotateY(30deg);
+}
+
+.perspective-box-far {
+  transform: perspective(9cm) rotateX(-15deg) rotateY(30deg);
+}
+
+.perspective-box-closer {
+  transform: perspective(4cm) rotateX(-15deg) rotateY(30deg);
+}
+
+.top {
+  background-color: skyblue;
+  transform: rotateX(90deg) translate3d(0, 0, 50px);
+}
+
+.left {
+  background-color: pink;
+  transform: rotateY(-90deg) translate3d(0, 0, 50px);
+}
+
+.front {
+  background-color: limegreen;
+  transform: translate3d(0, 0, 50px);
+}
+
+ +

Result

+ +

{{ EmbedLiveSample('Examples', '250', '350') }}

+ +

Specifications

+ + + + + + + + + + + + + + + + +
SpecificationStatusComment
{{SpecName("CSS Transforms 2", "#funcdef-perspective", "perspective()")}}{{Spec2("CSS Transforms 2")}}Initial definition
+ +

Browser compatibility

+ +

Please see the <transform-function> data type for compatibility info.

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See also

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