NAME

       PERIM3 - Draws the projection of a rectangular perimeter in a plane parallel to one of the
       three coordinate planes, with inward-pointing tick marks at specified intervals.

SYNOPSIS

       CALL PERIM3 (MAJOR1,MINOR1,MAJOR2,MINOR2,IAXIS,VALUE)

C-BINDING SYNOPSIS

       #include <ncarg/ncargC.h>

       void c_perim3 (int major1, int minor1, int major2, int minor2,
       int iaxis, float value)

DESCRIPTION

       MAJOR1      (an input expression of type INTEGER) specifies the number of major divisions
                   of those sides of the perimeter parallel to direction 1.  (Directions 1 and 2
                   are defined by the value of IAXIS.)  Major divisions are indicated by tick
                   marks.

       MINOR1      (an input expression of type INTEGER) specifies the number of minor divisions
                   per major division along those sides of the perimeter parallel to direction 1.
                   (Directions 1 and 2 are defined by the value of IAXIS.)  Minor divisions are
                   indicated by tick marks that, by default, are smaller than the tick marks
                   indicating major divisions.

       MAJOR2      (an input expression of type INTEGER) specifies the number of major divisions
                   of those sides of the perimeter parallel to direction 2.  (Directions 1 and 2
                   are defined by the value of IAXIS.)  Major divisions are indicated by tick
                   marks.

       MINOR2      (an input expression of type INTEGER) specifies the number of minor divisions
                   per major division along those sides of the perimeter parallel to direction 2.
                   (Directions 1 and 2 are defined by the value of IAXIS.)  Minor divisions are
                   indicated by tick marks that, by default, are smaller than the tick marks
                   indicating major divisions.

       IAXIS       (an input expression of type INTEGER) specifies which of the three axes the
                   perimeter is to be perpendicular to and identifies directions 1 and 2:

                   1  The perimeter is to be perpendicular to the U axis.  Direction 1 is
                      parallel to the V axis and direction 2 is parallel to the W axis.

                   2  The perimeter is to be perpendicular to the V axis.  Direction 1 is
                      parallel to the U axis and direction 2 is parallel to the W axis.

                   3  The perimeter is to be perpendicular to the W axis.  Direction 1 is
                      parallel to the U axis and direction 2 is parallel to the V axis.

       VALUE       (an input expression of type REAL)  is the value at which the plane of the
                   perimeter is to intersect the axis specified by IAXIS.  If IAXIS is a 1, VALUE
                   is a U coordinate; if IAXIS is a 2, VALUE is a V coordinate; and, if IAXIS is
                   a 3, VALUE is a W coordinate.

       Each call to PERIM3 draws a perimeter: a rectangle representing the intersection of a
       plane perpendicular to one of the three axes with the box specified by the arguments UMIN,
       UMAX, VMIN, VMAX, WMIN, and WMAX in the last call to SET3.  The perimeter can be placed at
       any desired position along the axis to which it is perpendicular; it can have inward-
       pointing major and minor tick marks along its edges, spaced as specified by the user.
       Tick marks along two parallel edges of the perimeter are controlled by one pair of
       arguments, and tick marks along the other two parallel edges are controlled by the other
       pair of arguments.

       Each of the arguments MAJOR1 and MAJOR2 refers to the number of major divisions (spaces
       between ticks) rather than to the number of major ticks; counting those at the ends, there
       will be one more major tick than there are major divisions.

       Each of the arguments MINOR1 and MINOR2 refers to the number of minor divisions (spaces
       between ticks) rather than to the number of minor ticks; in a given major interval, there
       will be one fewer minor tick than there are minor divisions.

       The rectangle itself is drawn in the current polyline color, as determined by the last
       call to the GKS routine GSPLCI; by default, color index 1 is used.  Major ticks and minor
       ticks are drawn in the colors implied by the values of the variables ITHRMJ and ITHRMN in
       the Threed COMMON block

             COMMON /THRINT/ ITHRMJ,ITHRMN,ITHRTX

       The default value of both ITHRMJ and ITHRMN is 1; user code may change these values.

       All lines are drawn using the current GKS line width scale factor, as set by the last call
       to the GKS routine GSLWSC.

C-BINDING DESCRIPTION

       The C-binding argument descriptions are the same as the FORTRAN argument descriptions.

EXAMPLES

       Use the ncargex command to see the following relevant examples: tthree, fthex01, fthex02,
       fthex03, fthex04, fthex05.

ACCESS

       To use PERIM3 or c_perim3, load the NCAR Graphics libraries ncarg, ncarg_gks, and ncarg_c,
       preferably in that order.

SEE ALSO

       Online: threed, curve3, fence3, frst3, line3, point3, psym3, pwrz, pwrzt, set3, threed,
       tick3, tick43, vect3, ncarg_cbind.

       Hardcopy: NCAR Graphics Fundamentals, UNIX Version

COPYRIGHT

       Copyright (C) 1987-2009
       University Corporation for Atmospheric Research
       The use of this Software is governed by a License Agreement.