rotation

问题 I have a chessboard in two images with some angle of rotation. Lets find the rotation angle of second image with reference of first image. For that I found the Rotation Matrix (3x3) and translation matrix (3x1) of those objects. How can I find the Rotation Angle and Rotation Axis of object using those matrices? 回答1: For every type of conversion between rotation representations you have this website euclidean space. You will find theory and code samples of: Rotation matrix to quaternion: link

问题 The <figure> element should rotate on hover but not its child, the <img> . Using SCSS only. <figure> has a background slightly bigger than <img> so it gives a border effect. .about__image { margin: 4rem; width: 27rem; height: 27rem; float: left; -webkit-shape-outside: circle(50% at 50% 50%); shape-outside: circle(50% at 50% 50%); -webkit-clip-path: circle(50% at 50% 50%); clip-path: circle(50% at 50% 50%); position: relative; background-image: radial-gradient(at left top, red 25%, blue 55%);

问题 The <figure> element should rotate on hover but not its child, the <img> . Using SCSS only. <figure> has a background slightly bigger than <img> so it gives a border effect. .about__image { margin: 4rem; width: 27rem; height: 27rem; float: left; -webkit-shape-outside: circle(50% at 50% 50%); shape-outside: circle(50% at 50% 50%); -webkit-clip-path: circle(50% at 50% 50%); clip-path: circle(50% at 50% 50%); position: relative; background-image: radial-gradient(at left top, red 25%, blue 55%);

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 7 months ago . I’d like to rotate fingerprint image from skew to vertical center By python with opencv I’m beginner. From this To this 回答1: Given an image containing a rotated blob at an unknown angle, the skew can be corrected with this approach Detect blob in the image Compute angle of

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 7 months ago . I’d like to rotate fingerprint image from skew to vertical center By python with opencv I’m beginner. From this To this 回答1: Given an image containing a rotated blob at an unknown angle, the skew can be corrected with this approach Detect blob in the image Compute angle of

问题 I am preparing a map application using OpenLayers. My customer wants to have his position displayed at bottom of the screen and he wants the map to rotate around him. As far as I know, positioning the map is done using ol.View.setCenter(coordinates) and rotation is done using ol.view.setRotation(radians) So, is there a way, how to set center / rotation origin pixel or Mr. Pythagoras calculation has to be done any time the map should be moved / rotated? 回答1: The easiest way would be to use CSS

问题 I'm writing a program in C and I need a M x N matrix to rotate clockwise. I tried some algorithms, but they only work in N x N matrices. The matrix {(1,4), (2,5), (3,6)} should become {(3,2,1), (6,5,4)} : 1 4 2 5 -> 3 2 1 3 6 6 5 4 I wrote this piece of code to transpose the matrix, and now I don't know how to swap the columns: void transpose(int matrix[MAX][MAX], int m, int n) { int transpose[MAX][MAX], d, c; for (c = 0; c < m; c++) for( d = 0 ; d < n ; d++) transpose[d][c] = matrix[c][d];

问题 My view hierarchy looks like this: tab bar -> navigation bar -> table view -> view 1 -> view 2 (UIWebView) How can I rotate view 2 so it can be displayed in both landscape & portrait mode? 回答1: Heres your fix...just solved the same problem. The issue is the tab bar controller is responding no to the shouldRotate method. Ignore the advice in the apple docs and create a subclass for tab view controller. In that subclass handle the shouldRotate -(BOOL)shouldAutorotateToInterfaceOrientation:

问题 I have a 1D array of length size * size , representing a square field of values. My goal is to rotate the array in place (previous question). I currently have issues getting the correct index in the inner rings. What is the mistake in my algorithm? This is my code, skip below for an explanation & examples. Code (Rust 1.41.0) fn rotate_square_slice<T>(slice: &mut [T], size: usize) { for r in 0..(size + 1) / 2 { // current ring side length let l = size - 1 - r; for i in r..l { let a = size * r

问题 Is there a way to rotate the MATLAB legend inside a plot? The image below should clarify my requirement. 回答1: You'll need to play around with the positioning, and need to do more work if you have more than one line plotted, but the following does it for your example. plot(1:10); % create a dummy line ha = legend('Plot'); %create a legend set(ha,'Units','pixels'); % set axes unit to pixels pos = get(ha,'Position'); % get the axes position set(ha,'Position',[pos(1) pos(2)-pos(3) pos(4) pos(3)])