public void testEquals() {
        LineRenderer3D r1 = new LineRenderer3D();
        LineRenderer3D r2 = new LineRenderer3D();
        assertEquals(r1, r2);

        r1.setXOffset(99.9);
        assertFalse(r1.equals(r2));
        r2.setXOffset(99.9);
        assertTrue(r1.equals(r2));

        r1.setYOffset(111.1);
        assertFalse(r1.equals(r2));
        r2.setYOffset(111.1);
        assertTrue(r1.equals(r2));

        r1.setWallPaint(new GradientPaint(1.0f, 2.0f, Color.red, 3.0f, 4.0f,
                Color.blue));
        assertFalse(r1.equals(r2));
        r2.setWallPaint(new GradientPaint(1.0f, 2.0f, Color.red, 3.0f, 4.0f,
                Color.blue));
        assertTrue(r1.equals(r2));