G2ROOT(1)

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
avaliable from the main ROOT website:
    http://root.cern.ch

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

COPYRIGHT
ROOT Software Terms and Conditions

The authors hereby grant permission to use, copy, and distribute this software and its documentation for any purpose, provided that existing copyright notices are retained in all copies and that this notice is included verbatim in any distributions. Additionally, the authors grant permission to modify this software and its documentation for any purpose, provided that such modifications are not distributed without the explicit consent of the authors and that existing copyright notices are retained in all copies. Users of the software are asked to feed back problems, benefits, and/or suggestions about the software to the ROOT Development Team (rootdev@root.cern.ch). Support for this software - fixing of bugs, incorporation of new features - is done on a best effort basis. All bug fixes and enhancements will be made available under the same terms and conditions as the original software,

IN NO EVENT SHALL THE AUTHORS OR DISTRIBUTORS BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OF THIS SOFTWARE, ITS DOCUMENTATION, OR ANY DERIVATIVES THEREOF, EVEN IF THE AUTHORS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

THE AUTHORS AND DISTRIBUTORS SPECIFICALLY DISCLAIM ANY WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT. THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, AND THE AUTHORS AND DISTRIBUTORS HAVE NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.

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).