private void UnmarkArea()
{
if (!unmarked)
{
unmarked = true;
int num = Grid.PosToCell(base.transform.GetPosition());
BuildingDef def = building.Def;
ObjectLayer layer = (!IsReplacementTile) ? building.Def.ObjectLayer : building.Def.ReplacementLayer;
def.UnmarkArea(num, building.Orientation, layer, base.gameObject);
if (def.IsTilePiece)
{
Grid.IsTileUnderConstruction[num] = false;
}
}
}
