Method CanLandAirship

src/game_map.cpp:943–981

bool Game_Map::CanLandAirship(int x, int y) {
	if (!Game_Map::IsValid(x, y)) return false;

	const auto* terrain = lcf::ReaderUtil::GetElement(lcf::Data::terrains, GetTerrainTag(x, y));
	if (!terrain) {
		Output::Warning("CanLandAirship: Invalid terrain at ({}, {})", x, y);
		return false;
	}
	if (!terrain->airship_land) {
		return false;
	}

	for (auto& ev: events) {
		if (ev.IsInPosition(x, y)
				&& ev.IsActive()
				&& ev.GetActivePage() != nullptr) {
			return false;
		}
	}
	for (auto vid: { Game_Vehicle::Boat, Game_Vehicle::Ship }) {
		auto& vehicle = vehicles[vid - 1];
		if (vehicle.IsInCurrentMap() && vehicle.IsInPosition(x, y)) {
			return false;
		}
	}

	const int bit = Passable::Down | Passable::Right | Passable::Left | Passable::Up;

	int tile_index = x + y * GetTilesX();

	if (!IsPassableLowerTile(bit, tile_index)) {
		return false;
	}

	int tile_id = map->upper_layer[tile_index] - BLOCK_F;
	tile_id = map_info.upper_tiles[tile_id];

	return (passages_up[tile_id] & bit) != 0;
}

bool Game_Map::CanEmbarkShip(Game_Player& player, int x, int y) {
	auto bit = GetPassableMask(player.GetX(), player.GetY(), x, y);