Function ForAllStationsNearTown

src/town_cmd.cpp:3748–3760

template <typename Func>
static void ForAllStationsNearTown(Town *t, Func func)
{
	/* Ideally the search radius should be close to the actual town zone 0 radius.
	 * The true radius is not stored or calculated anywhere, only the squared radius. */
	/* The efficiency of this search might be improved for large towns and many stations on the map,
	 * by using an integer square root approximation giving a value not less than the true square root. */
	uint search_radius = t->cache.squared_town_zone_radius[to_underlying(HouseZone::TownEdge)] / 2;
	ForAllStationsRadius(t->xy, search_radius, [&](const Station * st) {
		if (DistanceSquare(st->xy, t->xy) <= t->cache.squared_town_zone_radius[to_underlying(HouseZone::TownEdge)]) {
			func(st);
		}
	});
}

/**
 * Monthly callback to update town and station ratings.