trigonometry
2D Euclidean vector rotations
I have a euclidean vector a sitting at the coordinates (0, 1). I want to rotate a by 90 degrees (clockwise) around the origin: (0, 0).[详细]
2023-02-06 21:41 分类:问答How would I change an equation to modulate a number on a line, to one that that modulates on a sine curve?
I\'m trying to modulate an alpha value in a开发者_如何学Go Java application I\'m building on Android. Right now it goes like this:[详细]
2023-02-06 17:11 分类:问答Draw square with polar coordinates
I have a square, where the closest points are 1 unit away from the center. See my ascii diagram below:[详细]
2023-02-06 06:55 分类:问答Cosine Similarity measure applied on images
I am trying to work on a project which requires me to fi开发者_如何学Pythonnd the similarity between two images. Can anyone help me with the matlab code for applying cosine similarity on images or any[详细]
2023-02-05 21:45 分类:问答Raphael SVG VML Implement Multi Pivot Points for Rotation
Over the last two days I\'ve effectively figured out how NOT to rotate Raphael Elements. Basically I am trying to implement a multiple pivot points on element to rotate it by mouse.[详细]
2023-02-04 08:27 分类:问答Decomposing a rotation matrix
I have a rotation matrix. How can I get the rotation around a specified axis contained within this matrix?[详细]
2023-02-03 13:15 分类:问答How to calculate the height and width of an isometric rectangle/square
I\'m writing an isometric tile game.Each tile is twice as wide as it is tall (w:h = 2:1).A开发者_运维百科ll tiles in a map are the same size and their width and heights are known (TileWidth and TileHe[详细]
2023-02-02 14:59 分类:问答How to use the asin() function in objective c
I am trying to use the asin() fu开发者_如何学JAVAnction in an iOS app to calculate an angle from the y axis. I am using trigonometry, but I must be doing something wrong with the asin() function, as w[详细]
2023-02-02 08:18 分类:问答Mysql Recursive Query / Spherical Law of Cosines
I want to search nearest locations from coordinates (lat/lng) into mysql database, I use spherical law of cosines to searching these places :[详细]
2023-02-02 02:34 分类:问答How to represent sinh-1(a) in script?
I\'ve been skipping math clas开发者_JS百科ses, and now I have problems. :) Can you please explain to me how I should write this expression in Javascript?[详细]
2023-02-01 14:07 分类:问答