Thanks Jan-Marek and everyone else who replied. The
suggestions have been really helpful. I'm making some
progress. But I didn't know I had to deal with
hue/saturation/intensity stuff for this.
I searched but couldn't find any documentation for
gtk_hsv_to_rgb()?? One website (pretty old one) said
it was a private function. Can anyone point me to the
function's documentation if there's any?
Thank you!
Lola
--- Jan-Marek Glogowski <[EMAIL PROTECTED]> wrote:
> FYI - I just came up with the this example to
> illustrate a way to change
> the colors in a loop - it doesn't represent the
> solution!
>
> Algo is still:
> r = max, g = 0, b = 0
> r = max , g = max, b = 0
> r = 0, g = max, b = 0
> r = 0, g = max, b = max
> r = 0, g = 0, b = max
> r = max, g = 0, b = max
> back to step 1
>
> Quickest solution: Get yourself the latest source of
> gtk+, there is the
> file gtk/gtkhsv.c, which has the function
> hsv_to_rgb.
>
> Ranges from 0.0 - 1.0.
> hue = step * (i/max_step);
> saturation = 1.0;
> value = 1.0;
> hsv_to_rgb(&hue, &saturation, &value);
>
> Now they contain the rgb - values
>
> r = hue * G_MAXUINT16;
> g = saturation * G_MAXUINT16;
> b = value * G_MAXUINT16;
>
> or use gtk_hsv_to_rgb...
>
> ...
>
> JMG
>
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