NAME

       TDGRDS - Draw perimeters, optionally with ticks or grid lines, on the six sides of a box.
       This routine calls TDPARA and will therefore change the definition of the reference
       parallelogram.

SYNOPSIS

       CALL TDGRDS (UMIN, VMIN, WMIN, UMAX, VMAX, WMAX, USTP, VSTP, WSTP, IGRT, IHID)

C-BINDING SYNOPSIS

       #include <ncarg/ncargC.h>

       void c_tdgrds(float umin, float vmin, float wmin, float umax, float vmax, float wmax,
       float ustp, float vstp, float wstp, int igrt, int ihid)

DESCRIPTION

       The arguments of TDGRDS are as follows:

       UMIN, VMIN, WMIN, UMAX, VMAX, WMAX
               (input expressions of type REAL) - coordinate values defining the box in 3-space.
               The names of these should make it clear what they are.

       USTP, VSTP, and WSTP
               (input expressions of type REAL) - specify step sizes between ticks or grid lines
               in the U direction, the V direction, and the W direction, respectively.  If one of
               these values is less than or equal to zero, the ticks or grid lines in the
               associated direction are omitted.

       IGRT    (an input expression of type INTEGER) - of the form 10*IGRN+IGRF, where IGRN is a
               value specifying what to draw on the near sides of the box and IGRF is a value
               specifying what to draw on the far sides of the box, where "near" and "far" are as
               defined by the current line of sight.  Each of IGRN and IGRF can have one of the
               values 0 (draw nothing), 1 (draw just a perimeter), 2 (draw a perimeter with
               inward-pointing ticks), or 3 (draw a perimeter with a grid). For example, to draw
               grids on the far side of the box and just perimeters on the near sides of the box,
               use IGRT = 13.

       IHID    (an input expression of type INTEGER) - set to 0 to draw only those sides of the
               box that cannot be hidden by something inside the box or to 1 to draw only those
               sides of the box that can be hidden by something inside the box.  Standard
               operating procedure is to call TDGRDS before drawing surfaces inside a box, with
               IHID set to 1, and then call it again after drawing surfaces inside a box, with
               IHID set to 0.

C-BINDING DESCRIPTION

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

ACCESS

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

SEE ALSO

       Online: tdclrs, tdctri, tddtri, tdgeti, tdgetr, tdgrid, tdgtrs, tdinit, tditri, tdlbla,
       tdlbls, tdline, tdlnpa, tdmtri, tdotri, tdpack, tdpack_params, tdpara, tdplch, tdprpa,
       tdprpi, tdprpt, tdseti, tdsetr, tdsort, tdstri, tdstrs

COPYRIGHT

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