[ROOT] 2 copy of TClass in one TTree

From: Elena Vataga (vataga@fnal.gov)
Date: Mon Feb 04 2002 - 11:39:31 MET


	Hello, rooters!

Would be most thankful to you for advice!

I was trying to do the following: save in TTree 2 branches:
	1. all tracks found in event    (~50-60 tracks/event)
	2. tracks with associated hit in EM calorimeter (~1-3 trks/event)

To do it, wrote a class TTracks derived from TObject and
made 2 branches:

  TTrkBlock* Trks;		// TClonesArray of TTracks
  TTrkBlock* EleTrks;
  TTree* _isltup;
....
  Trks    = new TTrkBlock;
  EleTrks = new TTrkBlock;
...
 _isltup->Branch("CDF_TRACKs", "TTrkBlock", &Trks, bufsize,split);
 _isltup->Branch("Ele_TRACKs", "TTrkBlock", &EleTrks, bufsize,split);

The problem I have:
		 each of branches by itself (when I book ONLY
"CDF_TRACKs" or ONLY "Ele_TRACKs") is filled correctly.
When I am trying to book both branches - they are identical
because TTrack class is the same, so variables names are the same..
Is there a way to use the same class to write in 2 different branches
with different selection criteria?

	Thank you in advance,
				Elena



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