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  • Perspective

    2021-01-09 00:42:15
    get_perspective_transform" function didn't consistent with OpenCV's "getPerspectiveTransform". Is any bug there?</p><p>该提问来源于开源项目:kornia/kornia</p></div>
  • perspective

    千次阅读 2014-03-31 10:08:19
    perspective:表示用户与z=0的水平面之间的距离。0和负值都是无效值。 如果z轴坐标的值大于perspective的值,就不会画出来了。 使用perspective且值不为0 或 none,就会创建一个新的上下文栈(stacking context)。 ...

    perspective:表示用户与z=0的水平面之间的距离。0和负值都是无效值。

    如果z轴坐标的值大于perspective的值,就不会画出来了。

    使用perspective且值不为0 或 none,就会创建一个新的上下文栈(stacking context)。

    perspective值越小,透视图越深。



    参考:  

            https://developer.mozilla.org/en-US/docs/Web/CSS/perspective

    展开全文
  • 全部四级六级考研It's nice to have people agree, but you need conflicting perspectives to...出自-2015年12月阅读原文What I mean by that is the current perspective of the digital textbook is it's an exac...

    全部

    四级

    六级

    考研

    It's nice to have people agree, but you need conflicting perspectives to dig out the truth.

    出自-2015年12月阅读原文

    What I mean by that is the current perspective of the digital textbook is it's an exact copy of the print book.

    出自-2013年6月阅读原文

    Meditation (静思) techniques, in contrast, can teach people to put their shortcomings into a larger, more realistic perspective.

    出自-2010年6月阅读原文

    First,some historical perspective.

    出自-2014年6月阅读原文

    Obama's presidency viewed from a global perspective.

    出自-2010年6月阅读原文

    If someone has a great sense of humor, were a son, it means that they are happy, socially confident and have a healthy perspective on life.

    出自-2013年12月听力原文

    But most of all we need to keep the long-term perspective in mind: that even if computers will outsmart us, we can still be the most creative.

    2019年6月六级真题(第三套)阅读 Section C

    From a political perspective, we need to understand the terms on which major countries like China and the USA might sign up to a global agreement because at the moment we don't have that consensus.

    2016年12月六级真题(第二套)听力 Section A

    From a societal perspective, phone checking is less like belching in public and more like another bad habit.

    2017年12月六级真题(第一套)阅读 Section B

    Getting input from others not only offers a fresh perspective and thought process, it often also includes riskier choices.

    2018年6月六级真题(第三套)阅读 Section C

    One of the things that businesses and indeed government organizations often fail to do is to really see what is happening from the consumer's perspective.

    2017年6月六级真题(第二套)听力 Section C

    Pamela Harris, a lecturer at the University of Texas at Austin, has a similar perspective.

    2018年12月六级真题(第二套)阅读 Section C

    Personally, I do not believe in any of these slimming gadgets and I think I have a very different perspective when it comes to the definition of what is beautiful.

    2019年6月六级真题(第一套)听力 Section C

    Some experts even consider lying a developmental milestone, like crawling and walking, because it requires sophisticated planning, attention and the ability to see a situation from someone else5 s perspective to manipulate them.

    2019年12月六级真题(第一套)阅读 Section C

    This long perspective makes the pessimistic view of our prospects seem more likely to be a passing fad.

    出自-2013年考研阅读原文

    It allows us to have perspective on our lives - the ability to not take ourselves too seriously, to laugh at ourselves, to see the bigger picture, and to see that things will work out.

    出自-2016年考研翻译原文

    "It's already a huge problem from a public expenditure perspective for the whole country," he says.

    2017年考研真题(英语二)阅读理解 Section Ⅱ

    It's just about putting things into perspective.

    2019年考研真题(英语二)阅读理解 Section Ⅱ

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  • Perspective mode

    2020-11-29 02:38:09
    <div><p>First part of changes for perspective mode. <p>Description of changes: After first activation default vanishing points are created. They are placed around point (0, 0) on canvas. Vanishing ...
  • <div><p>Adds a new extension for contributing a <code>Perspective</code>. This is for supporting the developer perspective. <pre><code> export interface Perspective { id: string; name: string; ...
  • Add perspective

    2020-12-25 18:21:04
    <div><p>Add <code>.perspective</code></p>该提问来源于开源项目:jlmakes/rematrix</p></div>
  • Client perspective

    2020-12-30 12:55:03
    <div><p>Does anyone knows if theres a way to compile the otclient using another perspective instead 45º ? </p><p>该提问来源于开源项目:edubart/otclient</p></div>
  • Perspective correction

    2021-01-06 15:38:42
    <div><p>This fixes perspective transforms. Summary: - OpenGL uses homogeneous coordinates; our transforms need to do the same. - Corrected STTransform to work correctly when w != 1 - ...
  • Perspective warp

    2020-12-29 09:13:24
    The function accepts 2 images and 4 pairs of points in order to compute a perspective transformation matrix so the images overlay nicely. I found this works much better than simple scale/rotate/...
  • Clicked Open perspective from the menu <strong>Expected result Only one Vorto perspective is available <strong>Actual result Vorto perspective appears twice</p><p>该提问来源于开源项目:eclipse/...
  • perspective view

    2021-01-10 05:50:40
    <div><p>Ports perspective view from -js. fixes https://github.com/mapbox/mapbox-gl-native/issues/1140</p> <p><img width="799" alt="screen shot 2015-08-18 at 8 59 24 am" src=...
  • Adjust camera perspective

    2020-12-01 13:33:29
    <div><p>It is important to be able to adjust the camera perspective. [probably good in both Paraview and tomviz view properties] <p>The best solution would be in the view properties having a ...
  • perspective:大概表现的3d元素的展现出来,没有他,3d效果展现不大出来,他作用的是自己的子3d元素。  perspctive:Z;  perspective-origin:x,y;

         perspective:大概表现的3d元素的展现出来,没有他,3d效果展现不大出来,他作用的是自己的子3d元素。

        perspctive:Z;

       perspective-origin:x,y;

    展开全文
  • css3 perspective属性介绍

    2017-07-17 15:04:31
    perspective
    当你只设置
    
    • rotateX( angle )
    • rotateY( angle )
    • rotateZ( angle )这三个方法的时候,他看上去像2d的,实际上是3D的,

    比如

    <div id="animateTest" >
        <img src="http://imgcache.qq.com/ptlogin/head/1_100.gif" 
             width="100" height="100">
    </div>
    
    <div id="animateTest" 
         style="-webkit-transform: rotateY(40deg);">
        <img src="http://imgcache.qq.com/ptlogin/head/1_100.gif" 
             width="100" height="100">
    </div>
    第一张图是原始状态的DIV,第二张图是旋转后的效果。

    图1:


    现在我们试试perspective属性。我们设置perspect=400px。
    <div id="animateTest" 
         style="-webkit-transform: perspective(400px) rotateY(40deg);">
    <img src="http://imgcache.qq.com/ptlogin/head/1_100.gif" 
         width="100" height="100">
    </div>
    图2:

    可以明显的看出加了perspective,会使元素呈现3D效果。
    其实可以将元素和perspective比作成在照相,元素是拍摄的物体,而perspective是镜头,有近大远小的显示方式,镜头方向只能是垂直于Z轴向屏幕内,也就是从屏幕正前方向里看。
    可以调整镜头与平面位置:
    a) perspective属性设置镜头到元素平面的距离。所有元素都是放置在z=0的平面上。比如perspective(300px)表示,镜头距离元素表面的位置是300像素。
    b) perspective-origin属性规定了镜头在平面上的位置。默认是放在元素的中心。
    当你设置的perspective越大时,就相当于镜头离物体越远,拍摄的旋转程度就越小,当无限大时,就会出现图1中的效果了,当与物体的距离适当时,就能清晰地看出物体的旋转。

    不过在chrome中发现一个问题,那就是perspective一定要在rotateY(或rotateX)的前面。如果代码写成下面的情况,perspective的设置会无效。

    <div id="animateTest" style="-webkit-transform: rotateY(40deg) perspective(400px);">

    在FireFox中也是这种情况。


    perspective的属性值为0或负值或none(none是默认值)时,没有透视效果的。就是2D效果

    perspective有两种写法:
    1).放在应用元素的父元素上 2).放在应用的元素上
    <div class="parent perspective">
        <h1>Using perspective property on parent</h1>
        <div class="child"></div>
        <!--......-->
    </div>
    
    <div class="parent transform">
        <h1>Using transform: perspective() on children</h1>
        <div class="child"></div>
        <!--......-->
    </div>

    .parent.perspective {
      perspective: 50em;
    }
    
    .parent.perspective .child {
      transform: rotateX(50deg);
      background: tomato;
    }
    
    .parent.transform .child {
      transform: perspective(50em) rotateX(50deg);
      background: deepskyblue;
    }

    下图左边为perspective属性的效果,右边为transform:perspective()的效果


    可以明显看出差别,左边那张9个框相当于用一个照相机照下来的,而右边9个框相当于每个框用一台专属照相机拍下来的,这就是区别。


    backface-visibility 属性

    <!DOCTYPE html>
    <html>
    <head>
    <style>
    div
    {
    position:relative;
    height:60px;
    width:60px;
    border:1px solid #000;
    background-color:yellow;
    transform:rotateY(30deg);
    }
    #div1
    {
    backface-visibility:hidden;
    
    }
    #div2
    {
    backface-visibility:visible;
    
    }
    </style>
    </head>
    <body>
    
    <p>本例有两个 div 元素,均旋转 180 度,背向用户。</p>
    
    <p>第一个 div 元素的 backface-visibility 属性设置为 "hidden",所以应该是不可见的。</p>
    
    <div id="div1">DIV 1</div>
    
    <div id="div2">DIV 2</div>
    
    <p><b>注释:</b>本例只在 Internet Explorer 10、Firefox、Chrome 以及 Safari 中有效。</p>
    
    </body>
    </html>



    这个属性指的是当你旋转到元素的正面朝上时,如图



    transform:rotateY(30deg);变成
    transform:rotateY(180deg);
    
    
    
    

    div1和div2都背部朝上时,


    transform-style 属性

    transform-style属性是3D空间一个重要属性,指定嵌套元素如何在3D空间中呈现。他主要有两个属性值:flatpreserve-3d

    transform-style属性的使用语法非常简单:

    transform-style: flat | preserve-3d
    

    其中flat值为默认值,表示所有子元素在2D平面呈现。preserve-3d表示所有子元素在3D空间中呈现。

    也就是说,如果对一个元素设置了transform-style的值为flat,他的所有子元素在旋转时,都是以网页平面的x轴,y轴,z轴进行变换的,但是如果该元素设置成了preserve-3d,那么他的所有子元素在进行变换时,都是以父元素旋转以后的父元素平面为准线进行变形的

    transform-style属性需要设置在父元素中,并且高于任何嵌套的变形元素。

    <!DOCTYPE html>
    <html>
    <head>
    <meta charset="utf-8"> 
    <title>菜鸟教程(runoob.com)</title> 
    <style>
    	
    		#div1
    		{
    		position: relative;
    		height: 200px;
    		width: 200px;
    		margin: 100px;
    		padding:10px;
    		border: 1px solid black;
    		}
    		
    		#div2
    		{
    		padding:50px;
    		position: absolute;
    		border: 1px solid black;
    		background-color: red;
    		transform: rotateY(60deg);
    		
    		}
    		
    		#div3
    		{
    		padding:40px;
    		position: absolute;
    		border: 1px solid black;
    		background-color: yellow;
    		transform: rotateY(90deg);
    		
    		}
    </style>
    </head>
    
    <body>
    <div id="div1">
      <div id="div2">HELLO
      	<div id="div3">YELLOW</div>
      </div>
    </div>
    
    </body>
    </html>

    上例中,父元素没有设置preserve-3d,子元素旋转90度


    子元素消失了,所有可以说明是以页面为轴线

    给父元素加上preserve-3d,再将子元素旋转的角度变成30度,变成如图


    子元素旋转的角度加上父元素旋转的角度是90度,上图正好显示出子元素旋转的正是90度,所以加上preserve-3d,是以父元素旋转之后父元素的页面为轴线


    有一点需要特别提醒大家,如果你的元素设置了transform-style值为preserve-3d,就不能为了防止子元素溢出容器而设置overflow值为hidden,如果设置了overflow:hidden同样可以迫死子元素出现在同一平面(和元素设置了transform-styleflat一样的效果)

    展开全文
  • The Perspective screen is white/empty. The location bar above as well as the folder selector on the left panel both display the right folder. When I click on the Perspective selector (top right-hand ...
  • 单词 perspective 由词根 spect 扩展而来,这个词根很有眼力劲儿,能看到很多有深度的东西,一起来学学吧 ~词根介绍词根是spect,来源于拉丁语specere,意为 to look,to see,也就是“看”的意思。单词 aspect(n....
  • transform:perspective 和 perspective的区别 我们平时给元素设置视距,增加其3D效果。但是给父元素设置perspective属性和给自身直接设置transform:perspective属性有时候效果一样,有时候效果差别却很大。下面...
  • 181 remove perspective

    2020-12-09 08:52:31
    <div><p>Removed rust perspective definition from plugin.xml Provided perspective switching to finalPerspective attribute; Disable TestPespective class; <p>Signed-off-by: Sergei Kovalchuk </p><p>该提问...
  • If I am not mistaken, the current 3D map view is rendered in an isometric perspective, which is not what our (my?) brain would naturally expect from a realistic depiction of a 3D object. <p>Is it ...
  • Refactor perspective app

    2021-01-03 08:19:18
    <div><ul><li>subject tags should show up</li><li>streamline GET requests</li><li>remove load lens with unnamed perspective: redirect to named perspective instead</li></ul>该提问来源于开源项目:...
  • Add perspective widget

    2020-12-02 06:47:07
    <div><p>I discussed with that we should add support for <a href="https://perspective.finos.org/">Perspective</a></p> <p>Perspective is a nice and very performent (I believe) widget for exploring large...
  • <p>Add a Perspective widget to Panel or alternatively add support for Panel to Perspective. <h4>Additional info <ul><li>Panel normally runs on top of the Bokeh Server but can also run on top of other ...
  • perspective-fix

    2020-12-26 10:51:54
    <p>The invertible scroll view does not work on Android 7.0.0 because of scaleY/scaleX not working without a perspective transform. This fix adds the perspective transform, only on Android. More ...
  • Image perspective distortion

    2020-12-01 12:25:46
    <div><p>Hey, very nice library. Wondering if there's any way to do perspective distortion with this lib.</p><p>该提问来源于开源项目:h2non/bimg</p></div>
  • Remove Rust perspective

    2020-12-31 14:37:28
    <div><p>The Rust perspective seems to bring nothing over default Resources and Debug ones. It would probably be better to remove it if it doesn't add value.</p><p>该提问来源于开源项目:...

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