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Re: 20060607: color tables in gdcntr

Megan,

No. Once you run gpend, the device driver is shut down and
any configurations you had sent to it are lost. After you
set the colors in gpcolor, go ahead and run gdcntr.

Steve Chiswell
Unidata User Support


On Wed, 2006-06-07 at 14:52, Megan Gentry wrote:
> Ok, so I modified the script that I described before to use gpcolor to
> modify only colors 1 through 32.  Should I have a gpend after I exit
> gpcolor?  or should I be able to jump right into gdcntr and use the colors
> that I just defined?
> 
> Thanks,
> Megan
> 
> 
> > Megan,
> >
> > The $GEMTBL/luts directory files have a completely different format
> > than the $GEMTBL/colors/coltbl.xwp file so you cannot just copy that.
> > Also, you can only have 32 entries in the coltbl.xwp (eg, you can
> > only define colr indicies 1 through 32 in the COLORS parameters.
> >
> > The file $GEMTBL/colors/coltbl.ptype is an example of an alternative
> > color table where you can copy that to your working directory named
> > coltbl.xwp and have ranges of colors for Rain, Snow, ice and
> > other graphics.
> >
> > Steve Chiswell
> > Unidata User Support
> >
> >
> > On Wed, 2006-06-07 at 13:27, Megan Gentry wrote:
> >> Steve,
> >> I tried just copying ir_upc2.tbl to coltbl.xwp in my local directory
> >> where
> >> I'm running gdcntr and then making it executable.  The colors it
> >> displays
> >> do not correspond to the RGB values in the file... I get pinks, browns
> >> and
> >> greens when the RGB values describe shades of gray.
> >>
> >> Then I tried using gpcolor in a csh script like this...
> >>
> >> COLORS  = 1=0:0:0
> >> DEVICE  = xw
> >> r
> >>
> >> COLORS  = 2=10:10:10
> >> r
> >>
> >> and so on through all the colors in ir_upc2.tbl
> >>
> >> If I enter a "gpend" after this script is done running, then I get
> >> colors
> >> that don't look like the RBG values I entered.  If I do not enter a
> >> gpend
> >> and just go straight into gdcntr, when I try to plot the cloud top
> >> temperatures, the xw window remains blank.  Nothing is plotted and no
> >> error messages show up.
> >>
> >> Thanks,
> >> Megan
> >>
> >>
> >> > Megan,
> >> >
> >> > The graphic programs allocate 32 colors defined in
> >> > $GEMTBL/colors/coltbl.xwp which you reference by index in
> >> > the parameters such as FLINE, COLORS, LINE. The image color tables may
> >> > define up to 95 colors (though many use fewer values) through the
> >> > $GEMTBL/luts tables.
> >> >
> >> > You can modify a copy of coltbl.xwp in a local directory to
> >> > define the color RGB values that your FLINE indicies will
> >> > reference in gdcntr. Alternatively, you could use gpcolor
> >> > to define RGB values for a session.
> >> >
> >> > When a new XW (or GF/GIF) device is started, it will use the
> >> > coltbl.xwp file in the local directory if it exists before looking
> >> > in the $GEMTBL/colors directory. You can approximate the color LUT
> >> > for the grid contour fills though you will have to condense the
> >> > number of color ranges since the ir_upc2.tbl defines 95 color values.
> >> >
> >> > Steve Chiswell
> >> > Unidata User Support
> >> >
> >> >
> >> > On Wed, 2006-06-07 at 10:43, Megan Gentry wrote:
> >> >> I'd like to use an IR color table to display model cloud top
> >> >> temperatures
> >> >> in gdcntr.  I've found the color table that GARP uses to plot IR data
> >> >> with
> >> >> the ir_upc2 enhancement here...
> >> >> gempak/tables/luts/ir_upc2.tbl
> >> >> Is there a way to use this color table to plot model cloud top
> >> >> temperatures in gdcntr?
> >> >>
> >> >> Thanks,
> >> >> Megan Gentry
> >> >>
> >> >> ----------------------------------------------------
> >> >> Megan S. Gentry
> >> >> Graduate Research Assistant, Forecasting Lab
> >> >> Department of Marine, Earth and Atmospheric Sciences
> >> >> North Carolina State University
> >> >>
> >> >> ===============================================================================
> >> >> To unsubscribe gembud, visit:
> >> >> http://www.unidata.ucar.edu/mailing-list-delete-form.html
> >> >> ===============================================================================
> >> >
> >>
> >>
> >> ----------------------------------------------------
> >> Megan S. Gentry
> >> Graduate Research Assistant, Forecasting Lab
> >> Department of Marine, Earth and Atmospheric Sciences
> >> North Carolina State University
> >
> 
> 
> ----------------------------------------------------
> Megan S. Gentry
> Graduate Research Assistant, Forecasting Lab
> Department of Marine, Earth and Atmospheric Sciences
> North Carolina State University