Re: [ROOT] HEPEVT.h: choosing the right dimensions of /HEPEVT/

From: Rene Brun (Rene.Brun@cern.ch)
Date: Sat Jan 13 2001 - 17:00:40 MET


Dear Pasha,
Correct. However, note that both TPythia::ImportParticles (Pythia5)
and TPythia6::ImportParticles do not use /hepevt/, but /lujets/
Thse commons are respectively dimensionned to 2000 (Pythia5)
and 4000 (Pythia6).

Rene Brun

On Sat, 13 Jan 2001, Pasha Murat (630)840-8237 FNAL (630)859-3463 home wrote:

> Dear ROOTers,
> 
> I'd like to point out that ROOT is being distributed with the definition
> of /HEPEVT/ corresponding to old Pythia version 5, accomodating for 2000
> particles. New Pythia and the present "standard" (-:) definition of 
> /HEPEVT/ defines the particle list in there to be 4000 particles long. 
> After several times of spending an hour on learning this again an again,
> I think that it makes a lot of sense to have a preprocessor 
> conditional flag in Hepevt.h, such that it would be possible to 
> choose the right dimensions in this interface include file when
> building the ROOT libraries.
> 					best, Pasha
> 



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