fn move_inside_heights(
pieces: &mut [FortressPiece],
rng: &mut LegacyRandom,
lowest_allowed: i32,
highest_allowed: i32,
)fn move_inside_heights(
pieces: &mut [FortressPiece],
rng: &mut LegacyRandom,
lowest_allowed: i32,
highest_allowed: i32,
)