OpenMinecraft.InfdevHandler.SetHeightAt C# (CSharp) Method

        public override void SetHeightAt(int x, int z, int h, byte mat)
        {
            int oh=GetHeightAt(x,z);
            // Ignore air/water/lava
            List<byte> excused_blocks=new List<byte>(new byte[]{0,8,9,10,11});
            for (int y = 0; y < ChunkY; y++)
            {
                byte block = GetBlockAt(x,y,z);
                bool excused = excused_blocks.Contains(block);
                if (!excused && h < y) block = 0;   // REMOVE SHIT
                if (excused && h >= y) block = mat; // ADD DERT
                if (block==3 && h == y) block = 2;  // ADD GRASS
                SetBlockAt(x, y, z, block);
            }
            int X = x / ChunkX;
            int Z = z / ChunkZ;

            int _x = x - ((z >> 4) * ChunkX); //(px >> 4) & 0xf;
            int _z = z - ((z >> 4) * ChunkZ); //(py >> 4) & 0xf;

            Chunk c = GetChunk(X, Z);
            c.HeightMap[_x, _z]=h;
            SetChunk(c);
        }