@Test
public void testCrosses() {

	Square s = new Square(1, 1);
	assertFalse( I3.crosses(s.i, s.j));
	Log.d(tag, ""+L4 );
	assertFalse(L4.crosses(s.i, s.j));
	assertTrue(L4.crosses(-1, -2));
	assertFalse(L4.crosses(-2, -2));
}