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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]

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.

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(6)

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