gistfile1.txt

        void ProcessSetBlockPacket()
        {
            BytesReceived += 9;
            if (World == null || World.Map == null) return;
            ResetIdleTimer();
            short x = IPAddress.NetworkToHostOrder(reader.ReadInt16());
            short z = IPAddress.NetworkToHostOrder(reader.ReadInt16());
            short y = IPAddress.NetworkToHostOrder(reader.ReadInt16());
            ClickAction action = (reader.ReadByte() == 1) ? ClickAction.Build : ClickAction.Delete;
            byte type = reader.ReadByte();

            // if a player is using InDev or SurvivalTest client, they may try to
            // place blocks that are not found in MC Classic. Convert them!
            if (type > 65)
            {
                type = MapDat.MapBlock(type);
            }

            Vector3I coords = new Vector3I(x, y, z);

            // If block is in bounds, count the click.
            // Sometimes MC allows clicking out of bounds,
            // like at map transitions or at the top layer of the world.
            // Those clicks should be simply ignored.
            if (World.Map.InBounds(coords))
            {
                var e = new PlayerClickingEventArgs(this, coords, action, (Block)type);
                if (RaisePlayerClickingEvent(e))
                {
                    RevertBlockNow(coords);
                }
                else
                {
                    RaisePlayerClickedEvent(this, coords, e.Action, e.Block);
                    PlaceBlock(coords, e.Action, e.Block);
                }
            }
        }