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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]
       [-fps]

DESCRIPTION

       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.

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
               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.

       -periodic

       -no-periodic
               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

       -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
               occasionally 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
               seconds.).

       -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)

COPYRIGHT

       Copyright  (c)  1996   by   Tim   Auckland   <Tim.Auckland@Procket.com>
       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. (butterwo@ncsc.org).

AUTHOR

       Tim Auckland