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Floatbg is a little X-application that slowly modifies the color of
the root-window. You won't be able to see the color change, but after a
quarter of an hour, you'll notice that it did change, however.
The program does have a minimal processor time consumption, as it sleeps
most of the time and its computations are not complicated.
After having run for more than two hours, `ps ux' on my sparc reported the
following:
USER PID %CPU %MEM SZ RSS TT STAT START TIME COMMAND
rekers 849 0.0 0.7 52 80 p3 S 12:14 0:00 floatbg
Floatbg doesn't use any window, button or menu, and it can only be stopped
by killing it. This is a feature I don't like too much, but making a realy
nice user interface is just too much for such a little joke...
Floatbg starts with a random color and changes it deterministicly by moving
through a hsv-model of colors.
In the hsv-model, colors are described by three parameters:
h = hue stands for the tint of a color
(0 degrees is red, 60 = yellow, 120 = green, 180 = aquamarine, etc)
s = saturations stands for the brightness of the color
(0 = white, 1 = bright)
v = value stands for the intensity of the color
(0 = black, 1 = normal)
Every 10 seconds the hue is increased by 1 degree and the saturation is
changed by a sinus over the hue. The value remains fixed.
The default values are chosen such that all pastel tints are visited,
but these can of course be customized:
usage: floatbg [options]
where options are:
-display <display> or -d <display>
-help
-value <float> (default 0.87)
-satmid <float> (default 0.375)
-satvar <float> (default 0.125)
-fase <float> (default 0.25)
value, (satmid-satvar) and (satmid+satvar) must be between 0 and 1
Floatbg is free and yours!
I would like to hear about changes people made on it.
Amsterdam, September 18, 1989.
Jan Rekers (email: rekers@cwi.nl)
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