also, for the hallways, i don't actually link the rooms themselves, but the centers of the rooms, which ensures hallways don't end in the corner of a room.
currently, for a given room, the "center" of the room is calculated based on the room's width, height and position in the floor, so it should always be the same for this one room.
this means that, if all rooms were horizontally aligned and all had the same height, all the hallways would also be perfectly aligned, and it would look like a single, very long hallway going through every room in a straight line.