private static List<Player> getPlayers(Location center, double range) {
		List<Player> players = new ArrayList<Player>();
		String name = center.getWorld().getName();
		double squared = range * range;
		for (Player p : Bukkit.getOnlinePlayers())
			if (p.getWorld().getName().equals(name) && p.getLocation().distanceSquared(center) <= squared)
				players.add(p);
		return players;
	}