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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]
       [-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 (C) 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