CERN Program Library Long Writeup W5013 - CERNLIB ...

CALL GDINIT
This routine initialises the GEANT drawing package [DRAW001] and it has to be called before any other
graphic routine. GEANT uses the CERN-developed HIGZ [1] graphic library, and this has to be initialised
before the call to GDINIT. In the example given in [BASE100] the routines IGINIT and IGMETA are used.
Alternatively, the routine HPLINT from HPLOT [7] can be used. This routine calls the appropriate procedures
from HIGZ to initialise the underlaying graphics system. At the moment HIGZ can use several flavours
of GKS [2, 3, 4] and X11 and it is available on all machines where the CERN Program Library has been
installed.
CALL GPHYSI
Completes the data structure JMATE, (see [PHYS100]) calculating the cross-section and stopping power
tables.
CALL GBHSTA
Initialises the standard histograms requested by the user via the data record HSTA. The following histogram
keywords may be used :
TIME
SIZE
MULT
NTRA
STAK
time per event;
size of division IXDIV per event;
total number of tracks per event;
number of long life tracks per event;
maximum stack size per event.
GBHSTA should be called after GFFGO.
CALL GGCLOS
This routine has to be called at the end of the definition of the geometry by the user, after thal all volumes
have been defined and positioned and all detectors defined. Failure to call this routine will prevent the GEANT
system from working correctly. Main tasks of this routine are:
• close the geometry package;
• complete the JVOLUM data structure;
• process the detector definition provided by the user;
• prepare the tables for the tracking speed optimisation requested by the user via the GSORD routine or
the OPTI data record.
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