@Test
public void largestGapSouthWest() {

    Vector2d vector = VecmathUtil.newVectorInLargestGap(Arrays.asList(new Vector2d(0, 1), new Vector2d(1, 0)));
    assertThat(vector.x, closeTo(-0.707d, 0.01));
    assertThat(vector.y, closeTo(-0.707d, 0.01));
    assertThat(vector.length(), closeTo(1d, 0.01));
}