[gradsusr] transparent colours

[Jennifer Adams]

Transparent colors will be available with version 2.1 that will use  
the cairo library for graphics rendering. Until then, you have to make  
do with shaded plots and contour overlays, or a stippling kludge using  
maskout, const, and gxout grid with 'set gridln off'.
--Jennifer


On Jan 10, 2011, at 10:41 AM, Becker, Bernd wrote:

> Hello!
>
> How can I define transparent colours,
> that produce visualy distinguishable hues when overlapped?
>
> I would like to define areas on shaded plot that are,
> say, windy and warm, and where these areas overlap
> I would like to visualize that the ovelap area is windy and warm,
> without
> having to define another colour for that specific region.
>
> Rather than defined colors by RGB, I guess, I am asking if it is
> possible to
> define colours in grads using the HSLA colour model.
>
> best regards,
> Bernd.
>
>
> --
> Bernd Becker   Climate Impacts Product Development
> Met Office Hadley Centre    FitzRoy Road  Exeter   Devon EX1 3PB   
> United
> Kingdom
> Tel.: +44 (0) 1392 884511 Fax: +44 (0)870 900 5050
> E-mail:bernd.becker at metoffice.gov.uk -
> http://www.metoffice.gov.uk/research/our-scientists/seasonal-to-decadal/
> bernd-becker
>
>
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--
Jennifer M. Adams
IGES/COLA
4041 Powder Mill Road, Suite 302
Calverton, MD 20705
jma at cola.iges.org



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