CERN Program Library Long Writeup W5013 - CERNLIB ...

5 GEANT/GEOMETRY
Geometry commands.
5.1 OPTI iopti
IOPTI C “GSORD optimisation level” D=’0’ Minus
Possible IOPTI values are:
-1
2
This flag controls the tracking optimisation performed via the GSORD routine:
1 no optimisation at all; GSORD calls disabled;
0 no optimisation; only user calls to GSORD kept;
1 all non-GSORDered volumes are ordered along the best axis;
2 all volumes are ordered along the best axis.
5.2 SVOLU name shape numed npar par
NAME C “Volume name”
SHAPE C “Volume type”
NUMED I “Tracking medium number”
NPAR I “Number of shape parameters”
PAR C “Vector containing shape parameters”
CALL GSVOLU(name,shape,numed,par,npar,ivolu)
where par is a KUIP vector. It creates a new volume in the JVOLUM data structure.
5.3 SPOS name number mother x0 y0 z0 irot only
NAME C “Volume name”
NUMBER I “Copy number of the volume”
MOTHER C “Mother volume name”
X0 R “X coord. of the volume in mother ref. sys.”
Y0 R “Y coord. of the volume in mother ref. sys.”
Z0 R “Z coord. of the volume in mother ref. sys.”
IROT I “Rotation matrix number w.r.t. mother ref. sys.”
ONLY C “ONLY/MANY flag”
CALL GSPOS(name,number,mother,x0,y0,z0,irot,only)
It positions a previously defined volume in the mother.
5.4 SDVN name mother ndiv caxis
379 XINT002 – 23