rotation

问题 In this question Three.js: chaotic mesh rotation after applyMatrix I asked about an issue. Now I'll try to look at the issue from another end: to describe the desired behaviour of the program. I have an array of rotation matrices for each time point of object's state. Each rotation matrix represents a difference between some initial object state (point zero) and the desired state. User should be able at any time select any desired rotation matrix from the array. How to implement the correct

问题 I am looking to have one view in my app have landscape orientation. I have managed to get the view to stay in landscape when rotated manually, but if the device is already portrait, it stays portrait, regardless of its supported orientation (set using supportedInterfaceOrientations method) . Is there a way to get the view to rotate automatically? I have tried: [[UIApplication sharedApplication] setStatusBarOrientation:UIInterfaceOrientationLandscapeRight animated:NO]; but this doesn't work.

问题 Hi we are using jquery rotatble plugin for rotating a div $( function() { $('.new-multiple').rotatable(); }); .new-multiple{ display:inline-block; } <link rel="stylesheet" href="https://code.jquery.com/ui/1.12.1/themes/base/jquery-ui.css"> <script src="https://code.jquery.com/jquery-1.12.4.js"></script> <script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script> <link rel="stylesheet" href="https://cdn.jsdelivr.net/gh/godswearhats/jquery-ui-rotatable@1.1/jquery.ui.rotatable.css">

问题 Probably an easy fix, but for the life of me I can't figure it out or may be overthinking it. In short I have a div that rotatesY based on mousemove. I have that working, but I also need it to translate across the X axis as well. So I know I have to use transform: translateX(value), but not sure how to apply two transforms the best way in jquery. Thanks for the help. Fiddle link below. Also is there a way to change the rotationY directions? var $window = $(window), $box = $('#box') rotation =

问题 What is the method to use to rotate an image about a point that is not the image's center point using MATLAB? 回答1: Two rotations of the same angle are equal up to a translation. So you can just do rotation around the center, and then translate the image to put your own center of rotation at its old position. 回答2: The help to 'rotate' says: ROTATE Rotate objects about specified origin and direction. ROTATE(H,[THETA PHI],ALPHA) rotates the objects with handles H through angle ALPHA about an

问题 I have a bunch of objects (ActiveRecord) that have x and y coordinates relative to a HTML5 canvas element. I need to rotate sets of them by different number of degrees (in 90 degrees increments) and then store them again for a one time data migration. These objects are all relative to a canvas element so the coordinates start at (0,0) and I would like them to stay in that quadrant (bottom right), if possible. I assume that I need to do a rotation around (0,0) and then a translation down and

问题 I know this has been asked a lot but I'd like to know how to rotate a Tetris piece? I already made a long and bad solution (~170 lines of code) but there should be easier way to do it. My tetris pieces consist of 4 blocks which all know their location (row and column) in the matrix. Matrix itself is char-typed, so 4 blocks are all letters. It looks like this for example: ...... ..T... .TTT.. ...... I tried to simulate my matrix as coordinate system by counting the middle row and column and

问题 I'm processing huge TIFF images (grayscale, 8 or 16 bit, up to 4 GB) to be used as high resolution input data for a machine. Each image needs to be rotated by 90 degrees (clockwise). The input TIFF can be LZW or uncompressed, the output may be uncompressed. So far I implemented my own TIFF reader class in Objective C (including LZW decompression) which is able to handle huge files and does some caching in memory as well. At the moment the TIFF reader class is used for visualization and

问题 I can't understand how scaling and rotation are applied to QGraphicsItem . I need to be able to apply rotation and scaling ( not necessarily keeping aspect ratio ) and I get fully unexpected results. Rotation must be around the item center. I seem to have no problem doing that - yet if I try to debug the bounding rectangle, I get seemingly wrong values. If I don't keep aspect ratio, instead of rotation I get a very weird skew, and I have been struggling for quite a while to find the cause and

问题 I can't understand how scaling and rotation are applied to QGraphicsItem . I need to be able to apply rotation and scaling ( not necessarily keeping aspect ratio ) and I get fully unexpected results. Rotation must be around the item center. I seem to have no problem doing that - yet if I try to debug the bounding rectangle, I get seemingly wrong values. If I don't keep aspect ratio, instead of rotation I get a very weird skew, and I have been struggling for quite a while to find the cause and