NAME

       WMDRRG  -  plots  weather  map  regions  (indicating  "snow",  "rain", etc.), or solid regions indicating
       temperature zones.

SYNOPSIS

       CALL WMDRRG(N,X,Y,ITYPE,NC,XC,YC)

C-BINDING SYNOPSIS

       #include <ncarg/gks.h>

       void c_wmdrrg(int n, float *x, float *y, char *itype, int nc, float *xc, float *yc)

DESCRIPTION

       N           (Integer, Input) - The number of points supplied in the second and third arguments.

       X           (Real, Input) - The X coordinates  (specified in world coordinates) of N points that  specify
                   the control points of a spline curve that will be fitted to represent the requested region.

       Y           (Real,  Input) - The Y coordinates  (specified in world coordinates) of N points that specify
                   the control points of a spline curve that will be fitted to represent the requested region.

       ITYPE       (Character, Input) - Indicates the weather type to fill the region with, or a solid color.

                   ITYPE can be one of:

                           'T' for thunderstorms

                           'SH' for showers

                           'R' for rain

                           'F' for flurries

                           'SN' for snow

                           'I' for ice

                           'INDEXnn' where the number "nn" denotes a color index for a solid fill.

       NC          (Integer, input) - If NC is greater than 2, then the region resulting from the spline fit  to
                   ((X(I),Y(I)),I=1,N)  will  be  clipped  against  the  region in ((XC(I),YC(I)),I=1,NC). If no
                   clipping is to be done, then set NC equal to 1.

       XC          (Real, Input) - The X coordinates  (specified in world coordinates) of NC points that specify
                   a clipping polygon for the region resulting from the spline fit to ((X(I),Y(I)),I=1,N), if NC
                   is greater than 2.

       YC          (Real, Input) - The Y coordinates  (specified in world coordinates) of NC points that specify
                   a clipping polygon for the region resulting from the spline fit to ((X(I),Y(I)),I=1,N), if NC
                   is greater than 2.

USAGE

       Set the values for the appropriate internal parameters before  calling  WMDRRG  to  produce  the  desired
       region.  The  internal  parameters that control the appearance of regions are: COL and RHT.  As mentioned
       above, the points specified in the X and Y arrays serve as control points for  a  spline  curve  that  is
       fitted to the input polygon.  X(N) should equal X(1) and Y(N) should equal Y(1).

ACCESS

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

SEE ALSO

       Online: wmap, wmdflt, wmgetc, wmgeti, wmgetr, wmsetc, wmseti, wmsetr, wmap_params

       Hardcopy: WMAP - A Package for Producing Daily Weather Maps and Plotting Station Model Data

COPYRIGHT

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

UNIX                                              January 1995                                    WMDRRG(3NCARG)