various issues in field_tracer.py

[kostahoraites]

analysator/pyCalculations/fieldtracer.py

Line 30 in a3981d1

def dynamic_field_tracer( vlsvReader_list, x0, max_iterations, dx):

The dynamic field tracer was written for the 2D static_field_tracer, but has not been maintained to talk to static_field_tracer_3d()

Another vg_ grid-based field tracer has been developed in the group, but hasn't been merged into field_tracer.py

[kostahoraites]

@alhom does your latest PR address both of the above points? Perhaps we can close this.

[alhom]

Dynamic tracing hasn't been touched yet at all in my PRs.