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wmdrrg(3NCARG)


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.



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