Ultima.Map.GetRenderedBlock C# (CSharp) Method

        private short[] GetRenderedBlock(int x, int y, bool statics)
        {
            TileMatrix matrix = this.Tiles;

            if (x < 0 || y < 0 || x >= matrix.BlockWidth || y >= matrix.BlockHeight)
            {
                if (m_Black == null)
                    m_Black = new short[64];

                return m_Black;
            }

            short[][][] cache;
            if (Map.UseDiff)
                cache = (statics ? m_Cache : m_Cache_NoStatics);
            else
                cache = (statics ? m_Cache_NoPatch : m_Cache_NoStatics_NoPatch);

            if (cache == null)
            {
                if (Map.UseDiff)
                {
                    if (statics)
                        m_Cache = cache = new short[m_Tiles.BlockHeight][][];
                    else
                        m_Cache_NoStatics = cache = new short[m_Tiles.BlockHeight][][];
                }
                else
                {
                    if (statics)
                        m_Cache_NoPatch = cache = new short[m_Tiles.BlockHeight][][];
                    else
                        m_Cache_NoStatics_NoPatch = cache = new short[m_Tiles.BlockHeight][][];
                }
            }

            if (cache[y] == null)
                cache[y] = new short[m_Tiles.BlockWidth][];

            short[] data = cache[y][x];

            if (data == null)
                cache[y][x] = data = RenderBlock(x, y, statics, Map.UseDiff);

            return data;
        }