xscreensaver(1)
NAME
whirlygig -- zooming chains of sinusoidal spots
SYNOPSIS
whirlygig [-display host:display.screen] [-window] [-root]
[-mono] [-install] [-noinstall] [-visual arg] [-window-id
arg] [-xspeed arg] [-yspeed arg] [-whirlies arg] [-nlines
arg] [-xmode arg] [-ymode arg] [-speed arg] [-trail 1|0]
[-color_modifier arg] [-start_time arg] [-explain 1|0]
[-wrap 1|0] [-db] [-no-db]
DESCRIPTION
The whirlygig program draws a series of circles on your
screen. They then move about in a cyclic pattern
OPTIONS
whirlygig accepts the following options:
- -window Draw on a newly-created window. This is the
- default.
- -root Draw on the root window.
- -visual visual
- Specify which visual to use. Legal values are the
name of a visual class, or the id number (decimal
or hex) of a specific visual. - -xspeed speed
- Specify how fast the dots should cycle horizon
tally. Try out values from .01 to 4000. Random by
default. - -yspeed speed
- Specify how fast the dots should cycle vertically.
Try out values from .01 to 4000. Random by
default. - -xamplitude factor
- Specify the horizonatal amplitude. Try out values
from .01 to 10. Defaults to 1.0. - -yamplitude factor
- Specify the horizonatal amplitude. Try out values
from .01 to 10. Defaults to 1.0. - -whirlies a number
- Specify how many whirlies you want (per line).
Defaults to a random number. - -nlines number of lines
- Specify how many lines of whirlies you want.
Defaults to a random number. - -xmode mode
- -ymode mode
- Specify which mode to use for calculating the x
and y positions of the whirlies. Can be any of
spin, funky, circle, linear, test, fun, innie or
lissajous. Defaults to 'change' mode, which
randomly selects a new mode for x and y every now
an then. Unrecognized options default to spin. - -explain
- Prints some strings to the window explaining what
the initially selected modes are, before display
ing the whirlies. Off by default. - -trail 1 or 0
- Trail mode fails to erase the whirlies as they
move, so they leave a multicoloured trail behind.
Doesn't work if the doubled buffered mode is using
the X server's double buffer extension, and the
useDBEclear resource is true (which it is by
default). - -speed int
- Specifies how fast to cycle through the internal
time. Values 1,2 and 3 look ok, up to 10 is not
too bad, but beyond ends up flickery. Adjust
xspeed and yspeed instead. - -start_time int
- Where in the internal time cycle to start. Ranges
from 1 to 429496729, Defaults to a random value. - -xoffset factor
- Tell the whirlies to be offset by this factor of a
sin. Defaults to 1.0 - -yoffset factor
- Tell the whirlies to be offset by this factor of a
cos. Defaults to 1.0 - -offset_period factor
- Change the period of an offset cycle Defaults to 1
- -color_modifier int
- How many colors away from the current should the
next whirly be? - -wrap 1|0
- Causes whirlies that fall off the edge of the
screen to wrap over to the other end of the
screen. Otherwise they disappear and new ones to
materialize on the other side of the screen. The
difference is subtle, but it is different. Try it.
On by default. - -db
- -no-db Use double buffering to reduce flicker. This uses
- the double buffering extension if your X server
supports it, otherwise it draws to it's own pixmap
buffer and copies that to the window, which works
almost as well. If the resource 'useDBEClear' is
true, whirlies are not individually erased, so the
-trail option won't work, and running multiple
instances on the root window will flicker.
ENVIRONMENT
DISPLAY to get the default host and display number.
- XENVIRONMENT
- to get the name of a resource file that overrides
the global resources stored in the RESOURCE_MAN
AGER property.
SEE ALSO
COPYRIGHT
Copyright © 2001 by Ashton Trey Belew. Permission to use,
copy, modify, distribute, and sell this software and its
documentation for any purpose is hereby granted without
fee, provided that the above copyright notice appear in
all copies and that both that copyright notice and this
permission notice appear in supporting documentation. No
representations are made about the suitability of this
software for any purpose. It is provided "as is" without
express or implied warranty.
AUTHOR
- Ashton Trey Belew <trey@veggie.wesleyan.edu>, 31-Mar-01