Animate pileup interactions?

Hello!

First of all, Phoenix is fantastic - thanks a lot for developing it!

I have an idea for a feature request, and if we can develop a plan for how it can be implemented, I could possibly try to find some person-power to implement it.

At the HL-LHC we'll have precision-timing detectors in ATLAS and CMS that will help to separate the particles produced in up to 200 pp collisions that happen in a single bunch-crossing. It would be really fantastic to be able to animate this, just like the animate function now does. It's really not that much missing:

• Functionality to animate several pp interactions instead of just one (incoming bunches might be needed, but not exact proton pairs matching to create the collisions, I think - it will be quite crowded anyway)
• If a comprehensive truth-record is fed in (we would have ~1000 particles), the interactions would be created at the time stored for each primary vertex, and the particles from each interaction would come out of that point.

Does this sound like an interesting feature? And would it be feasible to implement? If there are some pointers to the relevant parts of the code and a brief set of steps the experts foresee are needed, I could try to find a willing student, perhaps :)

Best,
Christian

Start from the existing animate function and review how a comprehensive truth-record and primary-vertex times are currently represented. Define a plan for animating several pp interactions, with particles originating from their stored vertices; done means the event display can show multiple interactions in one bunch-crossing.