The data structure JVOLUM and JGPAR

The meaning of the variables in the data structure JVOLUM shown in fig. is the following:

ISEARC

search flag [GEOM400], [GEOM410]:

=0

volume positioning order or ordering by GSNEXT/GSNEAR;

<0

binary search as defined by GSORD;

>0

user ordering GSUNEA/GUNEAR;

ISHAPE

system shape number (see [GEOM050];

NIN

number of volumes contained in the mother volume -- if negative the volume is divided;

NMED

medium number for the volume;

NPAR

number of shape parameters;

NATT

number of attributes;

PAR

array of shape parameters;

IAT

array of attributes;

IAXIS

direction of the division (see [GEOM130]);

IVO

system volume number;

NDIV

number of divisions ( -NDVMX, if computed dynamically, see [GEOM140]);

C0

coordinate value at which the division starts;

STEP

coordinate step for the division;

NR

user copy number;

IROT

rotation matrix number defining the orientation of the volume with respect to the mother reference system;

X,Y,Z

position of the volume with respect to the mother reference system;

KONLY

ONLY/MANY flag, see [GEOM110] for more information;

Figure: Example of geometrical tree structure

GEOM200