public void translateSelectedAtomsTo(BitSet bs, Point3f p) {
		if (iAtom <= 0 || bs.cardinality() <= 0)
			return;
		Point3f center = getCenterOfSelectedAtoms(bs);
		for (int i = 0; i < iAtom; i++) {
			if (bs.get(i)) {
				atom[i].rx += p.x - center.x;
				atom[i].ry += p.y - center.y;
				atom[i].rz += p.z - center.z;
			}
		}
	}