@Before
    public void setUp() throws Exception {
        objects = new java.util.ArrayList<Sphere>();
        for (float x = LOWER_BOUND; x <= UPPER_BOUND; x += INCREMENT)
            for (float y = LOWER_BOUND; y <= UPPER_BOUND; y += INCREMENT)
                for (float z = LOWER_BOUND; z <= UPPER_BOUND; z += INCREMENT)
                    objects.add(new math.Sphere(new math.Vector3f(x, y, z),
                            RADIUS));
        //System.out.println(objects.size());
    }