|Message: Re: Primary Vertex Information to Track Information, and question about multiple parent tracks||Not Logged In (login)|
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> I see. What about assigning UserTrackInformation to a track based on the > primary's UserPrimaryVertexInformation? Is using PrimaryTransformer the > proper way to do this?
I am using the LXR browser and find that unfortunately none of the G4 examples uses G4VUserPrimaryVertexInformation - presumably in UserPrimaryGeneratorAction.
However, I do not advise modifying core G4 code (PrimaryTransformer) for your purposes. I believe you should be able to extract a primary vertex's information from the G4Track that you have access to in StackingAction::ClassifyNewTrack or TrackingAction::PreUserTrackingAction. In those methods you can then instantiate a UserTrackInformation and shove the information from the vertex to the track.