/* static */ bool ScriptAirport::IsNoiseLevelAllowed(TileIndex tile, AirportType type)
{
	extern Town *AirportGetNearestTown(const AirportSpec *as, const TileIterator &it, uint &mindist);
	extern uint8 GetAirportNoiseLevelForDistance(const AirportSpec *as, uint distance);

	if (!::IsValidTile(tile)) return false;
	if (!IsAirportInformationAvailable(type)) return false;

	const AirportSpec *as = ::AirportSpec::Get(type);
	if (!as->IsWithinMapBounds(0, tile)) return false;

	AirportTileTableIterator it(as->table[0], tile);
	uint dist;
	Town *t = AirportGetNearestTown(as, it, dist);
	if (!::Town::IsValidID(t->index)) return false;

	if (_settings_game.economy.station_noise_level) {
		return GetAirportNoiseLevelForDistance(as, dist) <= t->MaxTownNoise() - t->noise_reached;
	}

	int num = 0;
	const Station *st;
	FOR_ALL_STATIONS(st) {
		if (st->town == t && (st->facilities & FACIL_AIRPORT) && st->airport.type != AT_OILRIG) num++;
	}
	return 1 <= max(0, 2 - num);
}


		for (local type = 0; type <= 8; type++) {
			AILog.Info("type: " + WrightAI.GetAirportTypeName(type));
			local percent = -1;
			for (local tile = 0; tile < alltiles; tile++) {
				local noise = AIAirport.GetNoiseLevelIncrease(tile, type);
				local allowed_noise = AITown.GetAllowedNoise(AIAirport.GetNearestTown(tile, type));
				local old_result = (noise != -1 && allowed_noise != -1 && noise <= allowed_noise);
				assert(old_result == AIAirport.IsNoiseLevelAllowed(tile, type));
				local newpercent = (tile + 1) * 100 / alltiles;
				if (percent != newpercent) AILog.Info(newpercent + "%");
				percent = newpercent;
			}
		}
		AIController.Break("Iterated all types and tiles");