public List<Integer> get() {
		try {
			// get objects in range of center
			double [] lo = {kd_gsize/2 - kd_xrad, kd_gsize/2 - kd_yrad};
			double [] hi = {kd_gsize/2 + kd_xrad, kd_gsize/2 + kd_yrad};
			o = kd.range(lo, hi);

			// dump them to stdout (for debugging, comment this out)
			for (int i : o) {
				System.out.println(i);
			}
		}
		catch (Exception e) {
			System.err.println(e);
		}
		return o;
	}