From my algo dev stuff I realize it would be useful to define an arbitrary basis and create axes based on that. We would basically need set the rotation quaternion.

Maybe an API like:

ruler_other_basis = Ruler(basis_vector=(0.5, 0.5))  # define basis in 

For example, to display the axes for the othogonal basis represented by the two white points here:

@BalzaniEdoardo I think you might have ideas on how to do this 😄