transform | 易学教程

Python - Re-Implementing setattr with super

阅读更多关于 Python - Re-Implementing __setattr__ with super

问题 I know this one has been covered before, and perhaps isn't the most pythonic way of constructing a class, but I have a lot of different maya node classes with a lot @properties for retrieving/setting node data, and I want to see if procedurally building the attributes cuts down on overhead/mantinence. I need to re-implement __setattr__ so that the standard behavior is maintained, but for certain special attributes, the value is get/set to an outside object. I have seen examples of re

CSS3中动画属性transform、transition和animation

阅读更多关于 CSS3中动画属性transform、transition和animation

Transform：变形　　在网页设计中， CSS 被习惯性的理解为擅长表现静态样式，动态的元素必须借助于 javascript 才可以实现，而 CSS3 的出现改变了这一思维方式。 CSS3 除了增加革命性的创新功能外，还提供了对动画的支持，可以用来实现旋转、缩放、平移、扭曲和过渡效果等等，这些功能再一次证明了 CSS3 功能的强大和无限潜能。　　CSS3 实现元素变形的基础来源于新增的 transform 属性，该属性可用于实现元素的旋转、缩放、平移、扭曲等效果。目前 webkit 内核支持 -webkit-transform 私有属性， Mozilla Geckos 内核支持 -moz-transform 私有属性， IE 浏览器支持 -ms-transform 私有属性。　　在部分的 test case 当中，每每演示 transform 属性的，看起来好像都是带动画。这使得小部分直觉化思维的人（包括我）认为 transform 属性是动画属性。而恰恰相反， transform 属性是静态属性，一旦写到 style 里面，将会直接显示作用，无任何变化过程。 transform 的主要用途是用来做元素的特殊变形，对于做设计的人来说并不是很陌生，简单的来说就是 css 的图形变形工具。　　关于图形变形的基础条件当中的原点设定，在 css 里面使用的是 transform

Transforming data.frame in R

阅读更多关于 Transforming data.frame in R

问题 I have the following data frame: foo <- data.frame( abs( cbind(rnorm(3),rnorm(3, mean=.8),rnorm(3, mean=.9),rnorm(3, mean=1)))) colnames(foo) <- c("w","x","y","z") rownames(foo) <- c("n","q","r") foo # w x y z # n 1.51550092 1.4337572 1.2791624 1.1771230 # q 0.09977303 0.8173761 1.6123402 0.1510737 # r 1.17083866 1.2469347 0.8712135 0.8488029 What I want to do is to change it into : newdf # 1 n w 1.51550092 # 2 q w 0.09977303 # 3 r w 1.17083866 # 4 n x 1.43375725 # 5 q x 0.81737606 # 6 r x 1

scikit-learn文本处理时出现：fit_transform() missing 1 required positional argument: 'X'

阅读更多关于 scikit-learn文本处理时出现：fit_transform() missing 1 required positional argument: 'X'

In scikit-learn, everything with a fit_transform is an instance of some type, which is to say that you’ll need to initialize that instance first, where you are calling fit_transform as if it were a staticmethod. So, either create the instance by letting vectorizer = TfidfVectorizer() and use vectorizer.fit_transform(data.status), or just use TfidfVectorizer().fit_transform(data.status) directly. 小结：（1）TfidfVectorizer() TfidfVectorizer()是一个类，使用前需要实例化： vectorizer = TfidfVectorizer()；然后再调用其方法： vectorizer.fit_transform(data.status) 或者是直接调用其方法： TfidfVectorizer().fit_transform(data.status) （2

Clickable link area unexpectedly smaller after CSS transform

阅读更多关于 Clickable link area unexpectedly smaller after CSS transform

问题 I have an unordered list with a few list items that act as flip cards using CSS 3D transforms. I want them to flip via clicks on links/anchor elements inside of the list items, and these links fill up the entire list item as well. The list items look and act fine in their default non-flipped state, but once I click one and it flips, the clickable link area on the back side of it is only on the top half of the list item. When I inspect in Chrome, the link area is still filling up the entire

Chrome messing up images inside a scaled element which has border radius

阅读更多关于 Chrome messing up images inside a scaled element which has border radius

问题 USE CASE I am trying to build a "slide show" type application. Each slide has a fixed aspect ratio, but I want the contents to be rendered with their normal width/height - so I am trying to use the CSS3 "transform:scale" on the contents of the slide, using the viewport width/height I calculate the ideal scale/margins to fit the slide into the viewport. On one particular slide I am showing some "info card" for people and a list of each person's "successors" ISSUE Chrome is showing some very

Chrome messing up images inside a scaled element which has border radius

阅读更多关于 Chrome messing up images inside a scaled element which has border radius

webkit transforms: how to roate on Z axis, but not around center?

阅读更多关于 webkit transforms: how to roate on Z axis, but not around center?

问题 Any idea how to get the webkit transform rotation to rotate around a point different that the center of the element (e.g. around the top right corner)? 回答1: You can use transform-origin to change the position of the origin : .myClass{ -webkit-animation-duration: 1s; -webkit-animation-name: myAnim; -webkit-animation-iteration-count: infinite; -webkit-transform-origin: 275px 150px; -webkit-animation-timing-function: linear; } You just have to use a rotation to see it in action now :) Here is

Get transformed coordinates with canvas

阅读更多关于 Get transformed coordinates with canvas

问题 If I use a transformation function like translate / rotate on a canvas, then all points are transformed when passed to any canvas function. This works like a charm, but is there also a way to simply get the transformed point without actually drawing? This will be extremely helpful when debugging. All I can do now is looking where the point ends up, but I cannot seem to obtain the calculated transformed coordinates. So, say I rotate 90 degrees, is there any function that takes a point (i.e.

CSS 3D transform to make trapezoid of given edge lengths

阅读更多关于 CSS 3D transform to make trapezoid of given edge lengths

问题 I have an element of given dimensions (say, 100x300 px) living in a container of the same height and variable width that I want to transform using rotateX around -webkit-transform-origin: top center; while picking the -webkit-perspective of the container so that it appears that the bottom line of the image stays where it is but only expands to fill the entire container. Wow, that sounds confusing. Here's a picture: So basically, I want to create a trapezoid with a fixed upper width and a