Function storeyFootprintFaceInStore

storeyFootprintFaceInStore(
    factory: RoomPlateFactory,
    walls: readonly RoomWallRect[],
    weld: number,
): LayoutFace | null
The one face over the storey's whole outline, from its walls (storey-local); null without walls.
Parameters
- factory: RoomPlateFactory
- walls: readonly RoomWallRect[]
- weld: number
Returns LayoutFace | null