DragonFly On-Line Manual Pages

flow(6)                       XScreenSaver manual                      flow(6)

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

X Version 11                  5.34 (24-Oct-2015)                       flow(6)