This is what STAR collaboration (http://www.star./bnl.gov) has been
using for last 5 years.
STAR Geant3 -> C++ converter (the convertion code, St_geant_Maker
class,is available from the STAR CVS repository) converts "on fly".
(That was published 3-4 times for CHEP's and ACAT's)
In short to represent the geometry information TVolume OO model is used.
The kinematic is represented with TTable model.
I can provide further information later.
Hope this helps,
Valeri
> -----Original Message-----
> From: owner-roottalk@pcroot.cern.ch
[mailto:owner-roottalk@pcroot.cern.ch]
> On Behalf Of Rene Brun
> Sent: Tuesday, August 12, 2003 3:00 AM
> To: Ilektra A Christidi
> Cc: roottalk@pcroot.cern.ch
> Subject: Re: [ROOT] tracks from GEANT3 in ROOT
>
> Hi Ilektra,
>
> the g2root utility convert only the geometry data structures, not the
> kinematics or hits. Although this could be implemented, we have no
plans
> to
> do it in the short/medium term. If somebody succeeds with an
> implementation,
> let us know.
>
> Rene Brun
>
> Ilektra A Christidi wrote:
> >
> > Hello
> > I finally managed to import the whole detector in ROOT and draw it
> > properly (thanks! :o) ). I'm trying to do the same with tracks and
hits,
> > but it doesn't work: I save the JXYZ structure in the same zebra
file as
> > MATE, VOLU, etc. Then I g2root it, which seems to work ok - here is
the
> > output:
> >
> > ************** Directory ===> //LUN1 <===
> > Created 030811/1848 Modified 030811/1849
> > ===> List of objects
> > OBJECT VERSION CYCLE DATE/TIME NDATA
> > MATE 1 1 030811/1848 109567
> > PART 1 1 030811/1848 1745
> > ROTM 1 1 030811/1848 365
> > RUNG 1 1 030811/1848 47
> > SETS 1 1 030811/1848 3403
> > TMED 1 1 030811/1848 8542
> > VOLU 1 1 030811/1848 130410
> > JXYZ 1 1 030811/1849 172486
> > JXYZ 2 1 030811/1849 41854
> > JXYZ 3 1 030811/1849 436224
> > JXYZ 5 1 030811/1849 19991
> > JXYZ 9 1 030811/1849 94382
> > Number of records = 997 Number of megawords = 1 + 20040 words
> > Per cent of directory quota used = 99.700
> > Per cent of file used = 99.700
> > Blocking factor = 99.813
> > In g2rin, iquest(13)= 75
> > after rzink, ikey= 1iquest(1)= 0
> > trying to read:MATE
> > after rzink, ikey= 2iquest(1)= 0
> > trying to read:PART
> > after rzink, ikey= 3iquest(1)= 0
> > trying to read:ROTM
> > after rzink, ikey= 4iquest(1)= 0
> > trying to read:RUNG
> > after rzink, ikey= 5iquest(1)= 0
> > trying to read:SETS
> > after rzink, ikey= 6iquest(1)= 0
> > trying to read:TMED
> > after rzink, ikey= 7iquest(1)= 0
> > trying to read:VOLU
> > after rzink, ikey= 8iquest(1)= 0
> > trying to read:JXYZ
> > after rzink, ikey= 9iquest(1)= 0
> > trying to read:JXYZ
> > after rzink, ikey= 10iquest(1)= 0
> > trying to read:JXYZ
> > after rzink, ikey= 11iquest(1)= 0
> > trying to read:JXYZ
> > after rzink, ikey= 12iquest(1)= 0
> > trying to read:JXYZ
> > after rzink, ikey= 13iquest(1)= 1
> > nkeys= 12 nwkey= 2
> > nvolum= 185 jvolum= 3872631 Division volumePRM1 Division
volumeSCY5
> > Division volumeSCX1
> > Division volumeSCU1
> > Division volumeSCY1
> > Division volumeSCX3
> > Division volumeSCU3
> > Division volumeSCY3
> > Division volumePRM2
> > Division volumeSCY6
> > Division volumeSCX2
> > Division volumeSCU2
> > Division volumeSCY2
> > Division volumeSCX4
> > Division volumeSCU4
> > Division volumeSCY4
> > GEANT file: kopio_mc_19.rz converted to ROOT macro: kopio_mc_19.C
> >
> > but when I display my geometry in the TBrowser, the tracks folder is
> > empty and when I try to draw them there is no response. What am I
doing
> > wrong?
> > I saved the hits separatelly in another zebra file, but this one
core
> > dumped when I tried to g2root it. Is there any tool in ROOT to
handle
> > GEANT3 HITS strucures (without the intermediate step of filling an
> ntuple,
> > converting it into a TTree... etc), or not yet?
> >
> > Thank you
> >
> > Ilektra Christidi
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