GSI Forum
GSI Helmholtzzentrum für Schwerionenforschung

Home » PANDA » PandaRoot » Bugs, Fixes, Releases » FairMCPoint trackID vs FairLink trackID.
FairMCPoint trackID vs FairLink trackID. [message #11110] Wed, 20 October 2010 19:17 Go to previous message
Lia Lavezzi
Messages: 291
Registered: May 2007
Location: Torino
first-grade participant

From: *pv.infn.it
Hi Tobias,
I have a question on FairLink.
I tried to get the trackID from the simulated STTPoints, both with the fTrackID variable of FairMCPoint and from the FairLink, by doing:

cbmsim.Scan("STTPoint.fLinks.fType:STTPoint.fLinks.fIndex:STTPoint.fTrackID ")

I expected to find STTPoint.fLinks.fIndex always equal to STTPoint.fTrackID but I see that sometimes they are are different.

How is it possible? In PndSttPoint there is:
PndSttPoint::PndSttPoint(Int_t trackID, Int_t detID, TVector3 pos,
                         TVector3 posInLocal, TVector3 posOutLocal,
                         TVector3 momIn, TVector3 momOut,
                         Double_t tof, Double_t length, Double_t eLoss,
Double_t mass)
  : FairMCPoint(trackID, detID, pos, momIn, tof, length, eLoss)
{
   ...
  SetLink(FairLink("MCTrack", trackID));
}

...so trackID is the same in FairMCPoint and in FairLink. Confused

I also printed the trackID during the simulation, in ProcessHits, to see whether it was equal to STTPoint.fLinks.fIndex or STTPoint.fTrackID and it is equal to STTPoint.fLinks.fIndex.

Another test I did: I tried the command line I wrote above (with the equivalent points) for MVD, GEM and MDT and I see differences between *Point.fLinks.fIndex and *Point.fTrackID there too.

The main question is: am I reading the link in the wrong way or is there some real problem? Do you have any suggestion?

Thank you in advance,
Lia.

 
Read Message
Read Message
Read Message
Previous Topic: Problems with TPC and genfit
Next Topic: Memory leaks in digitization (TPC!)
Goto Forum:
  


Current Time: Mon Nov 29 14:50:18 CET 2021

Total time taken to generate the page: 0.02286 seconds