GEANT321/ghits/gfnhit.F

   1 *
   2 * $Id$
   3 *
   4 * $Log$
   5 * Revision 1.1.1.1  1995/10/24 10:21:09  cernlib
   6 * Geant
   7 *
   8 *
   9 #include "geant321/pilot.h"
  10 *CMZ :  3.21/02 29/03/94  15.41.20  by  S.Giani
  11 *-- Author :
  12       SUBROUTINE GFNHIT (IUSET, IUDET, NHITS)
  13 C.
  14 C.    ******************************************************************
  15 C.    *                                                                *
  16 C.    *    SUBR. GFNHIT (IUSET, IUDET, NHITS*)                         *
  17 C.    *                                                                *
  18 C.    *   Returns the number of hits belonging to the detector IUDET   *
  19 C.    *   of set IUSET                                                 *
  20 C.    *                                                                *
  21 C.    *   IUSET    User set identifier                                 *
  22 C.    *   IUDET    User detector identifier (name of the corresponding *
  23 C.    *            sensivitive volume)                                 *
  24 C.    *   NHITS    returns the total number of hits                    *
  25 C.    *                                                                *
  26 C.    *   Called by : <USER>                                           *
  27 C.    *   Author    : S.Banerjee                                       *
  28 C.    *                                                                *
  29 C.    ******************************************************************
  30 C.
  31 #include "geant321/gcbank.inc"
  32       CHARACTER*4     IUSET, IUDET
  33 C.
  34 C.    ------------------------------------------------------------------
  35 *
  36 * *** Find if selected set, detector exists
  37 *
  38       NHITS = 0
  39       IF (JHITS.LE.0)   GO TO 999
  40       NSET  = IQ(JSET-1)
  41       CALL GLOOK (IUSET, IQ(JSET+1), NSET, ISET)
  42       IF (ISET.LE.0)    GO TO 999
  43 *
  44       JS    = LQ(JSET-ISET)
  45       JH    = LQ(JHITS-ISET)
  46       IF (JS.LE.0)      GO TO 999
  47       IF (JH.LE.0)      GO TO 999
  48       NDET  = IQ(JS-1)
  49       CALL GLOOK (IUDET, IQ(JS+1), NDET, IDET)
  50       IF (IDET.LE.0)    GO TO 999
  51 *
  52       JD    = LQ(JS-IDET)
  53       JHD   = LQ(JH-IDET)
  54       IF (JHD.LE.0)     GO TO 999
  55       NFIX  = IQ(JD+1) + IQ(JD+3) + 1
  56       ILAST = IQ(JH+IDET)
  57 *
  58       IF (ILAST.GT.0) NHITS = ILAST / NFIX
  59 *                                                             END GFNHIT
  60   999 END