FSO.SimAntics.VM.AddToObjList C# (CSharp) Method

        public static void AddToObjList(List<VMEntity> list, VMEntity entity)
        {
            if (list.Count == 0) { list.Add(entity); return; }
            int id = entity.ObjectID-1;
            int max = list.Count-1;
            int min = 0;
            while (max-1>min)
            {
                int mid = (max+min) / 2;
                int nid = list[mid].ObjectID;
                if (id < nid) max = mid;
                else min = mid;
            }
            list.Insert((list[min].ObjectID>id)?min:((list[max].ObjectID > id)?max:max+1), entity);
        }

        public void RegeneratePortalInfo()
        {
            RoomInfo = new VMRoomInfo[Architecture.RoomData.Count()];
            for (int i = 0; i < RoomInfo.Length; i++)
            {
                RoomInfo[i].Entities = new List <VMEntity>();
                RoomInfo[i].Portals  = new List <VMRoomPortal>();
                RoomInfo[i].Room     = Architecture.RoomData[i];
                RoomInfo[i].Light    = new RoomLighting();
            }

            foreach (var obj in VM.Entities)
            {
                var room = GetObjectRoom(obj);
                VM.AddToObjList(RoomInfo[room].Entities, obj);
                if (obj.EntryPoints[15].ActionFunction != 0)
                { //portal object
                    AddRoomPortal(obj, room);
                }
                obj.SetRoom(room);
            }

            for (ushort i = 0; i < RoomInfo.Length; i++)
            {
                RefreshLighting(i, i == (RoomInfo.Length - 1));
            }
            if (VM.UseWorld)
            {
                World.InvalidateZoom();
            }
        }