def get_fundamental_zone_grid(resolution=2,
point_group=None,
space_group=None):
"""
Generates an equispaced grid of rotations within a fundamental zone.
Parameters
----------
resolution : float, optional
The characteristic distance between a rotation and its neighbour (degrees)
point_group : orix.quaternion.symmetry.Symmetry, optional
One of the 11 proper point groups, defaults to None
space_group: int, optional
Between 1 and 231, defaults to None
Returns
-------
rotation_list : list of tuples
Grid of rotations lying within the specified fundamental zone
"""
orix_grid = get_sample_fundamental(resolution=resolution,
space_group=space_group)
rotation_list = get_list_from_orix(orix_grid, rounding=2)
return rotation_list
def test_get_sample_fundamental_space_group(C6_sample):
""" Going via the space_group route """
# assert that space group #3 is has pg C2
assert C2 == get_point_group(3, proper=True)
C2_sample = get_sample_fundamental(4, space_group=3)
ratio = C2_sample.size / C6_sample.size
assert np.isclose(ratio, 3, rtol=0.025)
def test_get_sample_fundamental_zone_order(C6_sample):
""" Cross check point counts to group order terms """
D6_sample = get_sample_fundamental(4, point_group=D6)
ratio = C6_sample.size / D6_sample.size
assert np.isclose(ratio, 2, rtol=0.025)
def C6_sample():
return get_sample_fundamental(4, point_group=C6)