1flow(6x)                      XScreenSaver manual                     flow(6x)
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NAME

6       flow - strange attractors.
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SYNOPSIS

9       flow  [-display host:display.screen] [-visual visual] [-window] [-root]
10       [-count    number]    [-cycles     number]     [-periodic|-no-periodic]
11       [-search|-no-search]        [-rotate|-no-rotate]       [-ride|-no-ride]
12       [-box|-no-box]  [-dbuf|-no-dbuf]  [-ncolors  number]  [-delay   number]
13       [-fps]
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DESCRIPTION

16       Strange  attractors formed of flows in a 3D differential equation phase
17       space.  Features the popular attractors described by Lorentz, Roessler,
18       Birkhoff  and  Duffing, and can discover entirely new attractors by it‐
19       self.
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OPTIONS

22       -visual visual
23               Specify which visual to use.  Legal values are the  name  of  a
24               visual  class,  or the id number (decimal or hex) of a specific
25               visual.
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27       -window Draw on a newly-created window.  This is the default.
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29       -root   Draw on the root window.
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31       -count number
32               Number of particles in the flow.  Default: 3000
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34       -size number
35               Length of particle trails.  Negative  values  indicate  random‐
36               ness.   The computational load of a given flow depends on (par‐
37               ticle count) * (trail length).  Default: -10
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39       -cycles number
40               Timeout before changing objects.  0 - 800000.  Default: 10000.
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42       -periodic
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44       -no-periodic
45               turn on/off periodic attractors.  These are flows in  2  depen‐
46               dent  variables, with a periodic dependence on a third indepen‐
47               dent variable (eg time).  Flow will sometimes choose  to  start
48               all  the  particles  in the same phase to illustrate the flow's
49               cross-section.  Default: on
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51       -search
52
53       -no-search
54               turn on/off search for new attractors.  If this is  enabled,  a
55               fraction  of  the  computing  cycles is directed to searching a
56               60-dimensional parameter space for new strange attractors.   If
57               periodic  flows  are enabled, these can be searched too.  Watch
58               carefully - you are quite likely to  see  mathematical  objects
59               that  have never been seen before, and since the parameters are
60               not recorded, you'll probably never see them  again!   Default:
61               on
62
63       -rotate
64
65       -no-rotate
66               turn on/off rotating around attractor.  Default: on
67
68       -ride
69
70       -no-ride
71               turn on/off ride in the flow.  Default: on
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73               If  both -rotate and -ride are enabled the viewpoint will occa‐
74               sionally fly between the two views.
75
76       -box
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78       -no-box turn on/off bounding box.  Default: on
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80       -dbuf
81
82       -no-dbuf
83               turn on/off double buffering.  If  Flow  runs  slowly  in  full
84               screen,  but fast in a smaller window (eg on old graphics cards
85               with too little memory), try turning this option off.  Default:
86               on
87
88       -ncolors number
89               Number of Colors.  Default: 200.
90
91       -delay number
92               Per-frame  delay,  in  microseconds.  Default: 10000 (0.01 sec‐
93               onds.).
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95       -fps    Display the current frame rate and CPU load.
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ENVIRONMENT

98       DISPLAY to get the default host and display number.
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100       XENVIRONMENT
101               to get the name of a resource file that  overrides  the  global
102               resources stored in the RESOURCE_MANAGER property.
103

SEE ALSO

105       X(1), xscreensaver(1)
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108       Copyright  (c) 1996 by Tim Auckland <Tim.Auckland@Procket.com> Incorpo‐
109       rating some code from Stephen Davies Copyright (c) 2000
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111       Search code based on techniques described in "Strange Attractors:  Cre‐
112       ating Patterns in Chaos" by Julien C. Sprott
113
114       Permission  to  use, copy, modify, and distribute this software and its
115       documentation for any purpose and without fee is hereby  granted,  pro‐
116       vided  that  the  above  copyright notice appear in all copies and that
117       both that copyright notice and this permission notice  appear  in  sup‐
118       porting documentation.
119
120       This file is provided AS IS with no warranties of any kind.  The author
121       shall have no liability with respect to the infringement of copyrights,
122       trade  secrets  or any patents by this file or any part thereof.  In no
123       event will the author be liable for any  lost  revenue  or  profits  or
124       other special, indirect and consequential damages.
125
126       Adapted from swarm.c Copyright (c) 1991 by Patrick J. Naughton.
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128       Adapted from xswarm by Jeff Butterworth. (butterwo@ncsc.org).
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AUTHOR

131       Tim Auckland
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135X Version 11               6.00-4.fc34 (05-May-2021)                  flow(6x)
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