NAME

       ifs - draws spinning, colliding iterated-function-system images

SYNOPSIS

       ifs  [--display  host:display.screen]  [--visual  visual] [--window] [--root] [--window-id
       number] [--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.

       --window-id number
               Draw on the specified 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.

       XSCREENSAVER_WINDOW
               The window ID to use with --root.

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