void findNearestAtomIndex(int x, int y, Closest closest) {
		Atom champion = null;
		for (int i = atomCount; --i >= 0;) {
			Atom contender = atoms[i];
			if (contender.screenZ <= 1)
				continue; // XIE
			if (contender.isClickable() && contender.isCursorOnTopOf(x, y, minimumPixelSelectionRadius, champion)) {
				champion = contender;
			}
		}
		closest.atom = champion;
	}