@Test
public void testComputeNormal() {

    final Vector3f v1 = new Vector3f(1.1f, 9.5f, -7.2f);
    final Vector3f v2 = new Vector3f(Float.NaN, -0.2f, 6.1f);
    final Vector3f v3 = new Vector3f(-0.5f, -0.14f, -1.8f);
    final Vector3f retval = FastMath.computeNormal(v1, v2, v3);
    assertNotNull(retval);
    assertEquals(Float.NaN, retval.getX(), 0.0f);
    assertEquals(Float.NaN, retval.getY(), 0.0f);
    assertEquals(Float.NaN, retval.getZ(), 0.0f);
}