4.4.12 SUBROUTINE ZTREFL(P, THT, OTHSID) : REFLect a track in the x-y plane

If the track points to negative z, reflect it, otherwise don't.

ARGUMENTS:

INPUT :

    P : momentum of track.

OUTPUT :

    THT : reflected theta.
    OTHSID : TRUE if track was reflected.

IMPLICIT INPUTS:

    none.

IMPLICIT OUTPUTS:

    none.

CALLED BY :

ZTTRAK, TRAcK a particle through the detector (see 4.4.1). ZTTCYL, Track intersect with CYLinder (see 4.4.6). ZTTPLA, Track intersect with PLAne (see 4.4.8).

CALLED ROUTINE(S):

none

SIDE EFFECTS:

none.

AUTHORS:

M. Berggren, UFRJ

CREATION DATE:

07-APR-1995