Not possible with CGAffineTransform. An affine transform can always be decomposed into translations, rotations, shearing and scaling. They all map parallelograms into parallelograms, which your transform does not. For your transform, it can be done in two steps. One to convert the square into a trapezoid. p1—–p2 p1—–p2 | | –> | \ p3—–p4 p3——–p4′ … Read more
What problems are you running into with apply? It works for this toy example here and the group lengths are different: In [82]: df Out[82]: X Y 0 0 -0.631214 1 0 0.783142 2 0 0.526045 3 1 -1.750058 4 1 1.163868 5 1 1.625538 6 1 0.076105 7 2 0.183492 8 2 0.541400 9 … Read more
You could check out the answer to the question css transform, jagged edges in chrome Helped me out From the accepted answer: In case anyone’s searching for this later on, a nice trick to get rid of those jagged edges on CSS transformations in Chrome is to add the CSS property -webkit-backface-visibility with a value … Read more
The transformation property mentioned above falls in the 2D Transforms category of CSS properties. Along with the matrix() method mentioned above, there are a few other methods that accompany transform: translate(), rotate(), scale() and skew() To understand the matrix() method, it is best to understand the other four types first. TRANSFORMS: These four methods for … Read more
std::transform(myv1.begin(), myv1.end(), myv1.begin(), [](double d) -> double { return d * 3; });
Yes, the first operation done is the one the most on the right., i.e. here operation2 is done before operation1. This MDN article states indeed: The transform functions are multiplied in order from left to right, meaning that composite transforms are effectively applied in order from right to left. Here is the documentation : http://www.w3.org/TR/css-transforms-1/. … Read more
There are many ways to do this. Your lack of context makes it impossible to elect a “best” way. Here’s a few ayways. Kernel.const_get(:Bob) eval(:Bob.to_s) Kernel.const_get(:bob.to_s.capitalize)
Without any extra assumption on the world scene geometry, you cannot affirm that there is a projective transformation between the two views. This is only true if the scene is planar. A good reference on that topic is the book Multiple View Geometry in Computer Vision by Hartley and Zisserman. If the world scene is … Read more
You can use the same approach with DocumentBuilderFactory: DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance(); factory.setFeature(XMLConstants.FEATURE_SECURE_PROCESSING, true); … To make everyone use this automatically, you need to create your own implementation (by extending the one which you’re currenly using; use your debugger to find out). Set the feature in the constructor. Then you can pass the new factory … Read more
There are two ways to get/set transform values for SVG elements in Chrome, Firefox, IE, or any standards-fearing SVG user agent: Handling Transforms via Attributes // Getting var xforms = myElement.getAttribute(‘transform’); var parts = /translate\(\s*([^\s,)]+)[ ,]([^\s,)]+)/.exec(xforms); var firstX = parts[1], firstY = parts[2]; // Setting myElement.setAttribute(‘transform’,’translate(30,100)’); Pros: Simple to set and understand (same as the … Read more