rotate matrix 90 degrees

Bitmap convert (Bitmap a, int width, int height) { Int w = a. getWidth (); Int h = a. getHeight (); Bitmap newb = Bitmap. createBitmap (ww, wh, Config. ARGB_8888); // create a new Bitmap with the same length and width as SRC. Canvas cv = new Canvas (newb ); Matrix m = new Matrix (); M. postScale (1,-1); // vertical image flipM. postScale (-1, 1); // The image is flipped horizontally.M. postRotate (

, 0.0)//Shift 50 in the positive direction of X.GLROTATE3F (90,0.0,0.0,1.0)//rotate counterclockwise 90 ° along the x-axis.The matrix is represented as T (50,0,0) *r (1,0,0,90) *x.OpenGL has a matrix stack, which is advanced, and the matrix closest to X is the first to funct

Title: Give a matrix, rotate it clockwise 90 °.Problem Analysis: The Pass method is to transpose the matrix first, then reverse each line, or reverse each column first and then transpose it. I just want to say "It ' s amazing!". (Forgivig my poor english!)The code is as follows (it doesn't matter how the code is writte

Bitmap convert (Bitmap A, int width, int height){Int W = A. getwidth ();Int H = A. getheight ();Bitmap newb = bitmap. createbitmap (WW, wh, config. argb_8888); // create a new bitmap with the same length and width as SRC.Canvas CV = new canvas (NEWB );Matrix M = new matrix ();M. postscale (1,-1); // vertical image flipM. postscale (-1, 1); // The image is flipped horizontally.M. postrotate (-

Bitmap convert (Bitmap A, int width, int height) { Int W = A. getwidth (); Int H = A. getheight (); Bitmap newb = bitmap. createbitmap (WW, wh, config. argb_8888); // create a new bitmap with the same length and width as SRC.Canvas CV = new canvas (NEWB );Matrix M = new matrix (); M. postscale (1,-1); // vertical image flip M. postscale (-1, 1); // The image is flipped horizontally. M. postrotate (-