Provided by: xscreensaver-data-extra_5.36-1ubuntu1_amd64 
NAME
ifs - draws spinning, colliding iterated-function-system images
SYNOPSIS
ifs [-display host:display.screen] [-visual visual] [-window] [-root] [-no-db] [-delay number] [-detail
number] [-colors number] [-functions number] [-iterate | -recurse] [-no-rotate] [-no-scale]
[-no-translate] [-fps]
DESCRIPTION
The ifs program draws spinning, colliding iterated-function-system images.
OPTIONS
-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.
-window Draw on a newly-created window. This is the default.
-root Draw on the root window.
-no-db Disable double-buffering.
-delay number
Per-frame delay, in microseconds. Default: 20000
-colors number
Number of colours to use. Default: 200
-detail number
In -iterate mode, number of times to randomly iterate the functions, in thousands. In -recurse
mode, number of times to apply functions (recursion depth) before drawing each point. Default: 9
-functions number
Number of functions to be iterated. Default: 3
-iterate
Calculate by iteratively applying the functions in a random order, usually faster than -recurse.
This is the default.
-recurse
Calculate by recursively applying all combinations of the functions. This is the historical
behavior and may produce neater output than -iterate.
-no-rotate
Disable the rotation component of the functions.
-no-scale
Disable the scaling component of the functions.
-no-translate
Disable the varying translation component of the functions.
-no-multi
Turn off multi-coloured mode, only one colour is used to colour the whole set.
-fps Display the current frame rate and CPU load.
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_MANAGER property.
SEE ALSO
X(1), xscreensaver(1), ifs(6x)
COPYRIGHT
Copyright © Chris Le Sueur and Robby Griffin, 2005-2006
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
associated documentation files (the "Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the
following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial
portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT
LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
NO EVENT SHALL THE X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER DEALINGS IN THE SOFTWARE.
AUTHOR
This version by Chris Le Sueur <thefishface@gmail.com>, Feb 2005 Many improvements by Robby Griffin <rmg@terc.edu>, Mar 2006