@Test
 public void testCreateLineFromPointsHorz() {
   BitMask bm = BitMaskFactory.createLine(Vectors.create(-5, 1), Vectors.create(-1, 1));
   bm.trim();
   assertEquals(new BoundingBox(1, -5, 1, -1), bm.getBounds());
   assertEquals(0xF800000000000000l, bm.getSubmaskElement(0, 0));
 }