4.7.2 SUBROUTINE ZUI2PI(PHIIN, PHIOUT) : bring angle Into the interval 0 to 2PI

The angle PHIIN is set to the equivalent angle in 0 to 2pi.

ARGUMENTS:

INPUT :

    PHIIN : input angle.

OUTPUT :

    PHIOUT : output angle = PHIIN, but given in the interval 0-2 pi

IMPLICIT INPUTS:

    none.

IMPLICIT OUTPUTS:

    none.

CALLED BY :

any routine.

CALLED ROUTINE(S):

none

SIDE EFFECTS:

none.

AUTHORS:

K. Hultqvist, Stockholms Universitet

CREATION DATE:

20-APR-2001