Hi Valeri,
Numbering in ROOT and C++ starts at 0, not 1. If you replace the 2
lines:
track1 = (Track*)event->GetTracks()->UncheckedAt(1);
track2 = (Track*)event->GetTracks()->UncheckedAt(2);
by
track1 = (Track*)event->GetTracks()->UncheckedAt(0);
track2 = (Track*)event->GetTracks()->UncheckedAt(1);
Your program will probably work.
Note that you could also replace the 2 lines:
Track *track1 = new Track();
Track *track2 = new Track();
by
Track *track1 = 0;
Track *track2 = 0;
Rene Brun
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
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