Room

Vanilla game class representing an enclosed interior volume. Holds the list of interior cells forming the sealed space.

Room.Grids and walls on boundary

Source: F0029.

RoomController.World.GetRoom(gridPosition) returns the Room a cell belongs to. room.Grids lists the room's interior cells. Walls sit on the boundary (one layer outside room.Grids), which is why the wall-painting code expands one neighbor layer outward.

Wall-scan expansion comment (F0351)

Source comment from NetworkPainterPatch.cs:212-215:

The room's interior cells are in room.Grids; walls sit on the boundary, so expand one layer to cover both sides.

Room class and fields

Room : IEvaluable in Assets.Scripts.GridSystem. Field cluster:

public static List<Room> AllRooms = new List<Room>();

public List<WorldGrid> Grids = new List<WorldGrid>();

public long RoomId;

[XmlIgnore]
public bool IsDeletionCandidate;

public bool WillSave = true;

public GasMixture FrozenContents = GasMixtureHelper.Create();

[XmlIgnore]
public List<DynamicThing> DynamicContents = new List<DynamicThing>();

[XmlIgnore]
public RoomType RoomType;

public GasMixture GasMixture;

Grids is the list of interior cells (the enclosed volume, not the boundary). AllRooms is the global list of every room. RoomId is the stable identifier persisted in saves. GasMixture is the room's current gas state; RoomType is the classified room category.

Grid membership: AddGrid / RemoveGrid

public bool AddGrid(WorldGrid grid)
{
    if (Grids.Contains(grid))
    {
        return false;
    }
    Grids.Add(grid);
    RoomController.World.AddOrUpdateRoomLookup(grid, this);
    Atmosphere atmosphereLocal = GridController.World.AtmosphericsController.GetAtmosphereLocal(grid);
    if (atmosphereLocal != null)
    {
        atmosphereLocal.Room = this;
    }
    RoomManager.EvaluateRoomTypeRules(this);
    return true;
}

AddGrid is the single place that keeps three structures in sync: the room's own Grids list, the RoomController.RoomLookup cell -> room map, and the cell Atmosphere.Room back-reference. RemoveGrid(WorldGrid grid) reverses it. See ./RoomController.md and ./Atmosphere.md.

CacheRoomData: gas/data refresh

CacheRoomData() recomputes the room's cached gas snapshot; RunCacheRoomDataJobs() is the static driver that runs the CacheRoomData job on the atmospherics worker (AtmosphericsWorker.Execute(AtmosphericsWorker.Job.CacheRoomData)). This refresh is independent of the RoomController.GetRoom cell-lookup path; reading room membership does not trigger it.

Verification history

• 2026-04-20: page created from the Research migration; verbatim content lifted from F0029, F0351. No conflicts.
• 2026-05-22: added "Room class and fields", "Grid membership: AddGrid / RemoveGrid", and "CacheRoomData: gas/data refresh" sections from a room/grid/atmospherics decompile pass. Additive; existing sections unchanged. Source: Assets.Scripts.GridSystem.Room in Assembly-CSharp, game version 0.2.6228.27061. Added related links to RoomController, GridController, Atmosphere.

Open questions

None at creation.