public void Position_and_Direction_with_radius_and_azimuth()
{
var orbitingStand = new OrbitingStand(10, Constants.HALF_PI, 0);
Assert.AreEqual(new Vector3(0, 0, 10), orbitingStand.Position,
new Vector3EqualityComparer());
Assert.AreEqual(new Vector3(0, 0, -1), orbitingStand.Direction,
new Vector3EqualityComparer());
}