/// <summary>
/// Verifies that the specified 4 points are not rotated - that each point shares either the x or y coordinate with the previous point
/// </summary>
/// <returns></returns>
public static bool IsUnrotated(PointF[] a)
{
PointF lastPoint = a[a.GetUpperBound(0)];
foreach (PointF p in a) {
if (p.X != lastPoint.X && p.Y != lastPoint.Y) return false;
lastPoint = p;
}
return true;
}
/// <summary>
/// Grabs a single-dimension array from a 2 dimensional array, using the specified primary index.
/// </summary>
/// <param name="array"></param>
/// <param name="index"></param>
/// <returns></returns>
public static PointF[] GetSubArray(PointF[,] array, int index)
{
PointF[] sub = new PointF[array.GetUpperBound(1) + 1];
for (int i = 0; i < array.GetUpperBound(1) + 1; i++)
sub[i] = array[index, i];
return sub;
}
