THE EGS5 CODE SYSTEM

call rluxinit
after specifying LUXLEV and INSEED.
The user may also restart RANLUX at any desired point in a previously used sequence of random
numbers using either of two ways. RANLUX keeps a tally of the number of random numbers delivered
through the variables MKOUNT and KOUNT as MKOUNT*100000000 + KOUNT, and MKOUNT and KOUNT
are accessible at all times through COMMON RLUXDAT . If the user calls RLUXINIT and supplies values
of MKOUNT and KOUNT in addition to LUXLEV and INSEED, the RANLUX will be restarted at exactly
that point in the sequence defined by MKOUNT and KOUNT.
Alternatively, the user may execute the following statement
call rluxout
at any time, at which point integer representations of the current values of the seeds in RANLUX will
be returned via the array ISDEXT of COMMON RLUXDAT . A call to RLUXINIT at any time when the
values of ISDEXT are non-zero will result in a restart of RANLUX based on the seeds in ISDEXT.
Thus the restart options can be summarized as follows:
1. A brute-force method involves calling RLUXINIT with the values of the luxury level, initial
seed, and number of delivered randoms up to the time of the desired restart. The values of
MKOUNT and KOUNT can be obtained at any time directly from COMMON RLUXDAT.
2. A more elegant restart using the actual seeds can be done by passing the integer seeds at the
time of the restart to RLUXINIT via ISDEXT in COMMON RLUXDAT. The seeds in ISDEXT can be
obtained for later restart at any convenient time (such as the end of a shower, or the end of
a batch) by a call to RLUXOUT.
B.4.4 Specification of Incident Particle Parameters (Step 4)
This step required in constructing a MAIN user code is self-explanatory. An example of suitable
coding is given as follows:
iqi=-1
xi=0.0
yi=0.0
zi=0.0
ui=0.0
!Incident particle is an electron
!Particle coordinates
!Direction cosines
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