/// <summary>
        /// Runs a single tick for the world
        /// </summary>
        public override void Tick()
        {
            SetWorldTime(GetWorldTime() + 1L);

            for (int i = 0; i < 10 && EntitySpawnQueue.Count != 0; i++)
            {
                Entity entity = EntitySpawnQueue.GetEnumerator().Current;
                EntitySpawnQueue.Remove(entity);

                if (!LoadedEntityList.Contains(entity))
                {
                    SpawnEntityInWorld(entity);
                }
            }

            SendQueue.ProcessReadPackets();

            for (int j = 0; j < BlocksToReceive.Count; j++)
            {
                WorldBlockPositionType worldblockpositiontype = BlocksToReceive[j];

                if (--worldblockpositiontype.AcceptCountdown == 0)
                {
                    base.SetBlockAndMetadata(worldblockpositiontype.PosX, worldblockpositiontype.PosY, worldblockpositiontype.PosZ, worldblockpositiontype.BlockID, worldblockpositiontype.Metadata);
                    base.MarkBlockNeedsUpdate(worldblockpositiontype.PosX, worldblockpositiontype.PosY, worldblockpositiontype.PosZ);
                    BlocksToReceive.RemoveAt(j--);
                }
            }

            Field_20915_C.Unload100OldestChunks();
            TickBlocksAndAmbiance();
        }
        /// <summary>
        /// Invalidates an AABB region of blocks from the receive queue, in the event that the block has been modified
        /// client-side in the intervening 80 receive ticks.
        /// </summary>
        public virtual void InvalidateBlockReceiveRegion(int par1, int par2, int par3, int par4, int par5, int par6)
        {
            for (int i = 0; i < BlocksToReceive.Count; i++)
            {
                WorldBlockPositionType worldblockpositiontype = BlocksToReceive[i];

                if (worldblockpositiontype.PosX >= par1 && worldblockpositiontype.PosY >= par2 && worldblockpositiontype.PosZ >= par3 && worldblockpositiontype.PosX <= par4 && worldblockpositiontype.PosY <= par5 && worldblockpositiontype.PosZ <= par6)
                {
                    BlocksToReceive.RemoveAt(i--);
                }
            }
        }