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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] [-fps]


       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 itself.


       -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   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: on


               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: on

       -ncolors number
               Number of Colors.  Default: 200.

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

       -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