Use Geant4 Trajectories as a source

[DraTeots]

Add class that allows to create EventAction that saves G4 trajectories to convert them to phoenix json later.

[DhanashreePetare]

Greetings @DraTeots ..I am interested to work on the issue. Can you please assign this to me. ThankYou

[DraTeots]

Hello! I already implemented it some time ago:

https://github.com/HSF/phoenix-dd4hep

There is more updated version of the plugin:

https://github.com/eic/firebird/tree/main/dd4hep-plugin

It produces Firebird event display files (which uses true time information and true physical animation) but it also can produce phoenix files with

https://github.com/eic/firebird/blob/main/dd4hep-plugin/text_dump_steering.py

it produces text dump with trajectories and you use a python script to convert it to Phoenix json. Currently phoenix converter is removed from main branch, but you can find it in history OR I believe LLM would easily generate such script given phoenix format description and text file.

[DhanashreePetare]

Okay @DraTeots .I will have a look on it.

[DraTeots]

I just updated my answer

[DraTeots]

Sorry for the mess. Here is clarification

1. https://github.com/HSF/phoenix-dd4hep - uses stepping action to save data and produces phoenix format. Probably what you want.
2. updated https://github.com/eic/firebird/tree/main/dd4hep-plugin - can use also Geant4 trajectories specially designed for displaying them (e.g. in Geant4 display) which kind of more smooth. In reality you can barely see it and it makes difference with bare stepping actions... no it actually doesn't.

But if you want to animate, you need to do your own interpolation between the points.... but you probably not if you are not using Firebird, so just ask me, I'll point you where it is if needed.