Displaced jets

[matiasmantinan]

Hi, Is there a way to create a jet that is not center in the origin? I'm looking at the event data format (https://github.com/HSF/phoenix/blob/main/guides/developers/event_data_format.md) and I don't see any option to record the location of the jets.

[EdwardMoyse]

Sorry - I just saw this! No, we don't support this at the moment but it should be pretty easy to add. Are you still interested?

[matiasmantinan]

Yes, I think it would be a really nice feature to have! I can try to add it myself if you point to the pieces of code I need to modify.

[EdwardMoyse]

Great!

The code that draws the jet is here:

phoenix/packages/phoenix-event-display/src/loaders/objects/phoenix-objects.ts

Line 201 in f58715f

public static getJet(jetParams: any): Object3D {

You can see that it takes jetParams so the first step would be to conditionally handle "origin" coordinates and draw the jet accordingly (i.e. it should check if the x,y,z origin is in the parameters, and only handle a displaced jet if so).

To start with, you could hardcode this, but ultimately it would need to come from the calling code, so e.g.

• cms-loader
• edm4hep-json-loader
• jivexml-loader
• phoenix-loader

Also, the documentation would need updating.