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

6       flow - strange attractors.
7

SYNOPSIS

9       flow   [--display  host:display.screen]  [--visual  visual]  [--window]
10       [--root] [--window-id number] [--count number] [--cycles number] [--pe‐
11       riodic|--no-periodic]   [--search|--no-search]   [--rotate|--no-rotate]
12       [--ride|--no-ride] [--box|--no-box] [--dbuf|--no-dbuf] [--ncolors  num‐
13       ber] [--delay number] [--fps]
14

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

103       DISPLAY to get the default host and display number.
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105       XENVIRONMENT
106               to get the name of a resource file that  overrides  the  global
107               resources stored in the RESOURCE_MANAGER property.
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109       XSCREENSAVER_WINDOW
110               The window ID to use with --root.
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SEE ALSO

113       X(1), xscreensaver(1)
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116       Copyright  (c) 1996 by Tim Auckland <Tim.Auckland@Procket.com> Incorpo‐
117       rating some code from Stephen Davies Copyright (c) 2000
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119       Search code based on techniques described in "Strange Attractors:  Cre‐
120       ating Patterns in Chaos" by Julien C. Sprott
121
122       Permission  to  use, copy, modify, and distribute this software and its
123       documentation for any purpose and without fee is hereby  granted,  pro‐
124       vided  that  the  above  copyright notice appear in all copies and that
125       both that copyright notice and this permission notice  appear  in  sup‐
126       porting documentation.
127
128       This file is provided AS IS with no warranties of any kind.  The author
129       shall have no liability with respect to the infringement of copyrights,
130       trade  secrets  or any patents by this file or any part thereof.  In no
131       event will the author be liable for any  lost  revenue  or  profits  or
132       other special, indirect and consequential damages.
133
134       Adapted from swarm.c Copyright (c) 1991 by Patrick J. Naughton.
135
136       Adapted from xswarm by Jeff Butterworth. (butterwo@ncsc.org).
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AUTHOR

139       Tim Auckland
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143X Version 11               6.08-1.fc38 (17-Oct-2023)                  flow(6x)
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