flow(6x) XScreenSaver manual flow(6x)
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 vari-
able (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-dimen-
sional 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, 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 copy-
rights, 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 prof-
its 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 5.15 (28-Sep-2011) flow(6x)