TEM Simulator docs on Euler angle convention

[geoffwoollard]

Is there any docs in the TEM simulator on what convention is used? It would be really good to show how these angles are applied in the projection. Perhaps it could be illustrated in a notebook.

An idea:

1. Read in angles from the tem simulator output data
2. Make a rotation matrix, according to the right Euler angle convention: e.g. pytorch3d.transforms.euler_angles_to_matrix(..., convention='XZX')
3. Use the linear simulator to rotate and project
4. Show visually/numerically that the projections are identical. Numerically might be a bit tricky if the centring is off somehow in the TEM simulator. If so, visually could suffice.