SYNOPSIS
g2rootd [-f map_name] geant_name macro_nameDESCRIPTION
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.
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 <[email protected]>, for the Debian GNU/Linux system (but may be used by others).