Graph defining a straight beamline geometry.
This can be used as part of transformation graphs that require, e.g., scattering
angles (two_theta) or flight path lengths (L1 and L2).
- Parameters:
scatter (bool) – If True, a graph for scattering from sample_position is
returned, else a graph without scattering.
- Returns:
dict[str, Callable] – A dict defining a coordinate transformation graph.
