The TraceTree data structure and associated algorithms.
Details on each class, method and function in this sub-module are provided mostly for
developers. Users should refer to Tracing the beam for details on beam tracing,
Model.beam_trace() for the main method through which beam traces can be performed
on a model and
tracing.tools for the various beam propagation tools which the
beam tracing library provides.
A binary tree data structure representing all the beam tracing paths from some root optical node of a model.