x = corner[0]
                y = corner[1]
                xm = int(width/2)
                ym = int(height/2)
                a = np.deg2rad(angle)
                xr = (x - xm)*cos(a) + (y - ym)*sin(a)   + xm
                yr = -(x - xm)*sin(a) + (y - ym)*cos(a)   + ym
                new_corners[i][j].append((int(xr), int(yr)))