public void UpdatePatch()
        {
            //for each point to change go ahead and update the value in the byte array
            foreach (patchPoint p in toUpdate)
            {
                patchVals[p.y, p.x] = p.val;
            }
            //Update the SubImage
            GL.BindTexture(TextureTarget.Texture2D, patch2D);
            GL.TexSubImage2D(TextureTarget.Texture2D, 0, updateLeft, updateTop, updateRight - updateLeft, updateBottom-updateTop,PixelFormat.Luminance, PixelType.UnsignedByte, patchVals);

            //reset everything
            updateLeft = updateTop = Dimx;
            updateRight = updateBottom = 0;
            toUpdate.Clear();
        }