RE: Redirecting Branches in TTree

> As far as I see it your solution also requires that the data members are
> public not private as I would prefer it in oo programming.

Yes, you are correct.

Maybe the following would work better:
  Tree1->SetBranchAddress( "Obj", &Obj );   Tree2->SetBranchAddress( "Obj", &Obj );

  Tree1->GetEntry( i );
  Tree2->GetBranch("obj.data2")->GetEntry( i );

Alternatively, you could simply (when creating Tree2) copy the full object so that you only need Tree2.

Cheers,
Philippe.

-----Original Message-----
From: owner-roottalk_at_pcroot.cern.ch [mailto:owner-roottalk_at_pcroot.cern.ch] On Behalf Of Thomas Lauf
Sent: Friday, April 27, 2007 4:58 AM
To: ROOT Talk
Subject: Re: [ROOT] Redirecting Branches in TTree

Hi Philippe,
> In your simple case, the following might work:
> MyTree2->SetBranchAddress("Obj.data2",&obj->data2);
> And of course, read MyTree first then MyTree2.

Unfortunately your solution did not work.

I found a way to make this work, -- in short I am doing this:

Double_t Array[500];
Tree1->SetBranchAddress( "Obj", &Obj );
Tree2->SetBranchAddress( "m_Array2", &Array );

• but this does not use the data object any more which poses to me the question whether storing data in objects is feasible at all...

As far as I see it your solution also requires that the data members are public not private as I would prefer it in oo programming.

Thanks again for your help!
regards
Thomas

--
Thomas Lauf
MPE - Halbleiterlabor
E-Mail: thl_at_hll.mpg.de