1flow(6x) XScreenSaver manual flow(6x)
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6 flow - strange attractors.
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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]
14
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
19 itself.
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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.
26 -window Draw on a newly-created window. This is the default.
28 -root Draw on the root window.
30 -count number
32 Number of particles in the flow. Default: 3000
33 -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
38 -cycles number
40 Timeout before changing objects. 0 - 800000. Default: 10000.
41 -periodic
43 -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
50 -search
52 -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 -rotate
64 -no-rotate
66 turn on/off rotating around attractor. Default: on
67 -ride
69 -no-ride
71 turn on/off ride in the flow. Default: on
72 If both -rotate and -ride are enabled the viewpoint will occa‐
74 sionally fly between the two views.
75 -box
77 -no-box turn on/off bounding box. Default: on
79 -dbuf
81 -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 -ncolors number
89 Number of Colors. Default: 200.
90 -delay number
92 Per-frame delay, in microseconds. Default: 10000 (0.01 sec‐
93 onds.).
94 -fps Display the current frame rate and CPU load.
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98 DISPLAY to get the default host and display number.
99 XENVIRONMENT
101 to get the name of a resource file that overrides the global
102 resources stored in the RESOURCE_MANAGER property.
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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
110 Search code based on techniques described in "Strange Attractors: Cre‐
112 ating Patterns in Chaos" by Julien C. Sprott
113 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 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 Adapted from swarm.c Copyright (c) 1991 by Patrick J. Naughton.
127 Adapted from xswarm by Jeff Butterworth. (butterwo@ncsc.org).
129
131 Tim Auckland
132X Version 11 5.44-2.fc32 (16-Apr-2020) flow(6x)