get_beam_directions_grid

diffsims.generators.rotation_list_generators.get_beam_directions_grid(crystal_system, resolution, mesh='spherified_cube_edge')

Produces an array of beam directions, within the stereographic triangle of the relevant crystal system. The way the array is constructed is based on different methods of meshing the sphere [Cajaravelli2015] and can be specified through the mesh argument.

Parameters:

crystal_systemstr

Allowed are: ‘cubic’,’hexagonal’,’trigonal’,’tetragonal’, ‘orthorhombic’,’monoclinic’,’triclinic’

resolutionfloat

An angle in degrees representing the worst-case angular distance to a first nearest neighbor grid point.

meshstr

Type of meshing of the sphere that defines how the grid is created. Options are: uv_sphere, normalized_cube, spherified_cube_corner (default), spherified_cube_edge, icosahedral, random.

Returns:

rotation_listlist of tuples