public static T[,] Transform <T>(this T[,] array, FlipRotate2D transformation)
{
if (ReferenceEquals(array, null))
{
return(null);
}
byte t = transformation.Value;
int dim = t >> 2;
int w = array.GetLength(dim);
int h = array.GetLength(dim ^ 1);
int dx = (t >> 1 ^ t) & 1, dy = t & 1;
int ax_init = dx * (w - 1); dx = 1 - (dx << 1);
int ay_init = dy * (h - 1); dy = 1 - (dy << 1);
T[,] result = new T[w, h];
int[] a = new int[2];
a[dim ^ 1] = ax_init;
for (int rx = 0; rx < w; ++rx, a[dim ^ 1] += dx)
{
a[dim] = ay_init;
for (int ry = 0; ry < h; ++ry, a[dim] += dy)
{
result[rx, ry] = array[a[1], a[0]];
}
}
return(result);
}
public static T[,] Transform <T>(this T[,] array, RotateFlipType transformation)
{
return(Transform <T>(array, FlipRotate2D.FromRotateFlipType(transformation)));
}
