def norm(self):
"""Return norm of this quaternion
Returns
-------
quaternion_norm(self.q) : float
norm of this quaternion
Examples
--------
>>> from skrobot.coordinates.quaternion import Quaternion
>>> q = Quaternion()
>>> q.norm
1.0
>>> q = Quaternion([1, 2, 3, 4])
>>> q.norm
5.477225575051661
>>> q.normalized.norm
0.9999999999999999
"""
return quaternion_norm(self.q)
def test_random_quaternion(self):
testing.assert_almost_equal(quaternion_norm(random_quaternion()), 1.0)
def test_quaternion_norm(self):
q = np.array([1, 0, 0, 0])
self.assertEqual(quaternion_norm(q), 1.0)
q = np.array([0, 0, 0, 0])
self.assertEqual(quaternion_norm(q), 0.0)
