4.5.2 SUBROUTINE ZAORD(MODE, STEER) : Analysis ORDers

Example of a routine to define and read user steerings for the detector simulation. If MODE = 0, then the routine defines keys for FFREAD, if it is $\neq$ 0 then the routine reacts on the values read be FFREAD. So, the calling routine must do something like

          CALL ZAORD(0,STEER)
                .
                .
            (other key definitions)
                .
                .
                .
          CALL FFGO
          CALL ZAORD(1,STEER)
                .

This is what ZXRUIN does. Note that the variables read in by FFREAD must be in a common, even if SGV uses them only in this routine !

ARGUMENTS:

INPUT :

    MODE : 0 -> routine should define key-words, and
                default values.
           <> 0 -> load values of keys read from the steering file
                to the right common-blocks, do initialisation etc.

OUTPUT :

    STEER : Steering info. The analysis uses row 4:
                  STEER(4,1)   : How to use the detector hits. In the
                                 example :
                                   1 -> Use perigee parameters (ie. don't
                                        use hits at all)
                                   2 -> Fit track using the right hits.
                                   3 -> Run code to associate hits with
                                        tracks (met 1)
                                   4 -> ditto, met 2.
                         ,2)   : Minimum number of jets to use event
                         ,3)   : 1 -> Make event ntuple
                         ,4)   : 1 -> Make jet ntuple
                         ,5)   : Vertex fit method :
                                   0 -> Start with all tracks, then
                                        exclude tracks until a good vertex
                                        can be made.
                                   1 -> Start with two tracks, then include
                                        tracks until vertex becomes bad.
             In addition STEER(1,0) is an error flag:
                     0 : no error
                     1 : error, but go on
                     -2 : error, stop this run
                 All other position of the row are free to use.

IMPLICIT INPUTS:

    From /AINVAR/ : local variables used for clarity

IMPLICIT OUTPUTS:

    To /AINVAR/ : local variables used for clarity, after their values
      have been set by FFREAD.

CALLED BY :

ZXRUIN, RUn Initialisation (see 4.1.6).

CALLED ROUTINE(S):

FFKEY

(CERNLIB FFREAD routine.)

SIDE EFFECTS:

none.

AUTHORS:

M. Berggren, UFRJ

CREATION DATE:

07-APR-1995