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       flow - strange attractors.


       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]


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


       -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

       -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
               randomness.   The computational load of a given flow depends on
               (particle count) * (trail length).  Default: -10

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


               turn  on/off  periodic  attractors.   These  are  flows  in   2
               dependent  variables,  with  a  periodic  dependence on a third
               independent 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


               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:


               turn on/off rotating around attractor.  Default: on


               turn on/off ride in the flow.  Default: on

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


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


               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:

       -ncolors number
               Number of Colors.  Default: 200.

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

       -fps    Display the current frame rate and CPU load.


       DISPLAY to get the default host and display number.

               to get the name of a resource file that  overrides  the  global
               resources stored in the RESOURCE_MANAGER property.


       X(1), xscreensaver(1)


       Copyright   (c)   1996   by   Tim  Auckland  <>
       Incorporating some code from Stephen Davies Copyright (c) 2000

       Search code based  on  techniques  described  in  "Strange  Attractors:
       Creating 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,
       provided  that the above copyright notice appear in all copies and that
       both that  copyright  notice  and  this  permission  notice  appear  in
       supporting 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. (


       Tim Auckland