using System;
namespace PixelMath 
{ 
	public class PixelMath 
	{
		public const float MissingValue = -33333F;
		public void Process2dImage(float[,] image, ref float[,] imageOut)
		{
			int offsetY = (int)(imageOut.GetLength(0)/2);
			int offsetX = (int)(imageOut.GetLength(1)/2);

			for (int y=0; y<imageOut.GetLength(0); y++)
				for (int x=0; x<imageOut.GetLength(1); x++)
				{
					try
					{ 
						if (y%2==0)
						{
						 	if (x%2==0) imageOut[y/2,x/2]=image[y,x];
							else imageOut[y/2,x/2+offsetX]=image[y,x];
						}
						else
						{
						 	if (x%2==0) imageOut[y/2+offsetY,x/2]=image[y,x];
							else imageOut[y/2+offsetY,x/2+offsetX]=image[y,x];
						}
					}
					catch {imageOut[y,x]=MissingValue;}
				}
		}
	}
}