[ROOT] TTree, TLorentzVector and splitting

From: Volker Hejny (V.Hejny@fz-juelich.de)
Date: Sat Jun 23 2001 - 14:39:29 MEST


Hi all,

I´m currently using version 3.01 and observed the following behaviour
when upgrading from previous versions. I store a class A in a tree,
which contains a TClonesArray of class B. Two member variables of
class B are of type TLorentzVector. The branch has been set using
tree->Branch("name","A",&pA).

When reading data written with this code, the 3-vector component
of TLorentzVector is always zero. Setting the split level explicitly
to 1, the data are valid again. 

Is this a wanted "feature"?

Best regards,
Volker

-- 
Dr. Volker Hejny                Tel: 02461/616853                      ** 
Institut f. Kernphysik          Fax: 02461/613930                     **
---------------------------------------------------------------- **  ** ---  
Forschungszentrum Juelich GmbH, D-52425 Juelich                    **



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