Re: The second branch

From: Tioukov Valeri (valeri@d500na1.na.infn.it)
Date: Wed Mar 03 1999 - 12:23:38 MET


Dear Rene,

I applied the proposed corrections but they seems have no effect at all.

> Numbering in ROOT and C++ starts at 0, not 1. If you replace the 2
> lines:

It is correct of cause but nor 1 nor 0 newer happend in this example
in fact the lowest tracks number  was around 500 in MainEvent.

I made available the code of the example at:
http://chorusdq.na.infn.it/r/MainEvent.cxx
all my lines are marked as //VT

http://chorusdq.na.infn.it/r/branch1.root  - the result with 1 branch
http://chorusdq.na.infn.it/r/branch2.root  - the result with 2 branches

Thank you for your help
Valeri

> 
> Tioukov Valeri wrote:
> > 
> > Dear rooters,
> > 
> > I have 2 TObjArrays and after some selections I need to store objects
> > from them into the different branches of the tree.
> > 
> > When I have just one branch it works fine. If I add the second all tree
> > leaves are filled by zeros.
> > 
> > To illustrate a problem I added the following lines into
> > test/MainEvent.cxx:
> > 
> >      // Create one event
> > ....
> >      Track *track1 = new Track();
> >      Track *track2 = new Track();
> > ....
> >      TTree *tree2 = new TTree("T2","My example of a ROOT tree");
> >      tree2->Branch("track1", "Track", &track1, bufsize,split);  //1-st branch
> >      tree2->Branch("track2", "Track", &track2, bufsize,split);  //2-d branch
> > ....
> > 
> > // inside the event cycle:
> > 
> >          if( event->GetNtrack()>1) {
> >            track1 = (Track*)event->GetTracks()->UncheckedAt(1);
> >            track2 = (Track*)event->GetTracks()->UncheckedAt(2);
> >            if (write) tree2->Fill();
> >          }
> > 
> > ....
> > 
> > If I just comment the line belongs to one branch  the tree filling
> > correctly.
> > 
> > What is wrong here?
> > 
> > Best regards
> > Valeri Tioukov
> 



This archive was generated by hypermail 2b29 : Tue Jan 04 2000 - 00:43:29 MET