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flow(6)			      XScreenSaver manual		       flow(6)

       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  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.


	       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


	       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 occa‐
	       sionally 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 sec‐

       -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 <Tim.Auckland@Procket.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. (butterwo@ncsc.org).

       Tim Auckland

X Version 11		      5.07 (10-Aug-2008)		       flow(6)

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