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XScreenSaver(6x)                                              XScreenSaver(6x)



NAME
       flow - strange attractors.

SYNOPSIS
       flow  [-display host:display.screen] [-visual visual] [-window] [-root]
       [-count    number]    [-cycles     number]     [-periodic|-no-periodic]
       [-search|-no-search]        [-rotate|-no-rotate]       [-ride|-no-ride]
       [-box|-no-box] [-dbuf|-no-dbuf] [-ncolors number] [-delay number]

DESCRIPTION
       Strange attractors formed of flows in a 3D differential equation  phase
       space.   Features  the popular attractors described by Lorentz, Rssler,
       Birkhoff and Duffing, and can now discover entirely new  attractors  by
       itself.

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.

       -count number
               Number of particles in the flow.  Default: 3000

       -size number
               Length  of  particle  trails.  Negative values indicate random-
               ness.  The computational load of a given flow depends on  (par-
               ticle count) * (trail length).  Default: -10

       -cycles number
               Timeout before changing objects.  0 - 800000.  Default: 10000.

       -periodic

       -no-periodic
               turn  on/off  periodic attractors.  These are flows in 2 depen-
               dent variables, with a periodic dependence on a third  indepen-
               dent  variable  (eg time).  Flow will sometimes choose to start
               all the particles in the same phase to  illustrate  the  flow's
               cross-section.  Default: on

       -search

       -no-search
               turn  on/off  search for new attractors.  If this is enabled, a
               fraction of the computing cycles is  directed  to  searching  a
               60-dimensional  parameter space for new strange attractors.  If
               periodic flows are enabled, these can be searched  too.   Watch
               carefully  -  you  are quite likely to see mathematical objects
               that have never been seen before, and since the parameters  are
               not  recorded,  you'll probably never see them again!  Default:
               on

       -rotate

       -no-rotate
               turn on/off rotating around attractor.  Default: on

       -ride

       -no-ride
               turn on/off ride in the flow.  Default: on

               If both -rotate and -ride are enabled the viewpoint will  occa-
               sionally fly between the two views.

       -box

       -no-box turn on/off bounding box.  Default: on

       -dbuf

       -no-dbuf
               turn  on/off  double  buffering.   If  Flow runs slowly in full
               screen, but fast in a smaller window (eg on old graphics  cards
               with too little memory), try turning this option off.  Default:
               on

       -ncolors number
               Number of Colors.  Default: 200.

       -delay number
               Per-frame delay, in microseconds.  Default:  10000  (0.01  sec-
               onds.).

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)

COPYRIGHT
       Copyright (c) 1996 by Tim Auckland <Tim.AucklandATProcket.com>  Incorpo-
       rating some code from Stephen Davies Copyright (c) 2000

       Search  code based on techniques described in "Strange Attractors: Cre-
       ating Patterns in Chaos" by Julien C. Sprott

       Permission to use, copy, modify, and distribute this software  and  its
       documentation  for  any purpose and without fee is hereby granted, pro-
       vided that the above copyright notice appear in  all  copies  and  that
       both  that  copyright  notice and this permission notice appear in sup-
       porting documentation.

       This file is provided AS IS with no warranties of any kind.  The author
       shall have no liability with respect to the infringement of copyrights,
       trade secrets or any patents by this file or any part thereof.   In  no
       event  will  the  author  be  liable for any lost revenue or profits or
       other special, indirect and consequential damages.

       Adapted from swarm.c Copyright (c) 1991 by Patrick J. Naughton.

       Adapted from xswarm by Jeff Butterworth. (butterwoATncsc.org).

AUTHOR
       Tim Auckland



X Version 11                  4.21 (01-Mar-2005)              XScreenSaver(6x)