Data.getBigTileNoFromScreen C# (CSharp) Method

    public int getBigTileNoFromScreen(int[] screenData, int index)
    {
        int w = getScreenWidth();
        int h = getScreenHeight();
        int noY = index / w;
        noY = h - noY - 1;
        int noX = index % w;
        return screenData[noY*w + noX];
    }