NAME

       g2root - convert GEANT geomtry files to ROOT files

SYNOPSIS

       g2rootd [-f map_name] geant_name macro_name

DESCRIPTION

       You  can convert a GEANT (see http://wwwinfo.cern.ch/asd/geant/index.html fore more on GEANT) geometry to
       ROOT geometry with the following steps

       1      Run the interactive version of GEANT and produce a Zebra RZ  file  detector.geom,  by  typing  the
              command:

              Geant > rz/file 21 detector.geom on

       2      Run the g2root program to convert the Zebra RZ file into a ROOT macro detector.C:

              g2root detector.geom detector.C

       3      Run the following ROOT session;

              root [1] .x detector.C
              root [2] detector.Draw()
              root [3] c1.x3d()   // (this invokes the 3-d Root viewver)
              root [4] TFile f("detector.root","NEW") //open a new root file
              root [5] detector.Write() //Write the geometry structure
              root [6] f.Write()

       Note  that  the  TNode  structure currently in ROOT was not designed as a replacement for a true geometry
       package. The idea was mainly to draw simple geometries  in  event  display  programs.  We  are  currently
       investigating several alternatives for a true & efficient geometry package supporting;

       -      a disk data base with storage of multiple geometry versions

       -      an interactive editor and viewer

       -      with 3-d views

       -      but also 2-d cut views

       -      with interfaces to existing or future MC such as GEANT3 or GEANT4

       A  second  program called gh2root (see http://root.cern.ch/root/gh2root.html) generates automatically C++
       code corresponding to the GEANT3 Zebra structures JSET, JVERTX, JKINE, JHITS and JDIGI.

SEE ALSO

              root(1), h2root(1),
       and
              The ROOT Users Guide
       available from the main ROOT website:
              http://root.cern.ch

ORIGINAL AUTHORS

       The ROOT team (see web page above):
              Rene Brun and Fons Rademakers

COPYRIGHT

       This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser
       General Public License as published by the Free Software Foundation; either version 2.1 of  the  License,
       or (at your option) any later version.

       This  library  is  distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
       the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser  General
       Public License for more details.

       You should have received a copy of the GNU Lesser General Public License along with this library; if not,
       write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

AUTHOR

       This  manual  page  was  written  by  Christian Holm Christensen <cholm@nbi.dk>, for the Debian GNU/Linux
       system (but may be used by others).

ROOT                                                Version 3                                          G2ROOT(1)