@Test
public void intersection2() {

    Tuple2d intersect = VecmathUtil.intersection(new Point2d(6, 1), new Vector2d(-4, -2), new Point2d(1, 6),
            new Vector2d(2, 4));
    assertThat(intersect.x, closeTo(-4, 0.01));
    assertThat(intersect.y, closeTo(-4, 0.01));
}