HOWTO Convert a starsim geometry to ROOT

# First create the geometry tag in starsim
$ starsim
starsim > detp geom y2009c
starsim > gexec $STAR_LIB/geometry.so
starsim > ** (Or .$STAR_HOST_SYS/lib/geometry.so if it's something you're working on )
starsim > gclos all
starsim > grfile y2009c.rz
starsim > exit

# Now we have the geometry in a ZERBRA file... to go to ROOT
$ g2root y2009c.rz
$ root y2009c.C