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]
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15 Strange attractors formed of flows in a 3D differential equation phase
16 space. Features the popular attractors described by Lorentz, Roessler,
17 Birkhoff and Duffing, and can now discover entirely new attractors by
18 itself.
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21 -visual visual
22 Specify which visual to use. Legal values are the name of a
23 visual class, or the id number (decimal or hex) of a specific
24 visual.
25 -window Draw on a newly-created window. This is the default.
27 -root Draw on the root window.
29 -count number
31 Number of particles in the flow. Default: 3000
32 -size number
34 Length of particle trails. Negative values indicate random‐
35 ness. The computational load of a given flow depends on (par‐
36 ticle count) * (trail length). Default: -10
37 -cycles number
39 Timeout before changing objects. 0 - 800000. Default: 10000.
40 -periodic
42 -no-periodic
44 turn on/off periodic attractors. These are flows in 2 depen‐
45 dent variables, with a periodic dependence on a third indepen‐
46 dent variable (eg time). Flow will sometimes choose to start
47 all the particles in the same phase to illustrate the flow's
48 cross-section. Default: on
49 -search
51 -no-search
53 turn on/off search for new attractors. If this is enabled, a
54 fraction of the computing cycles is directed to searching a
55 60-dimensional parameter space for new strange attractors. If
56 periodic flows are enabled, these can be searched too. Watch
57 carefully - you are quite likely to see mathematical objects
58 that have never been seen before, and since the parameters are
59 not recorded, you'll probably never see them again! Default:
60 on
61 -rotate
63 -no-rotate
65 turn on/off rotating around attractor. Default: on
66 -ride
68 -no-ride
70 turn on/off ride in the flow. Default: on
71 If both -rotate and -ride are enabled the viewpoint will occa‐
73 sionally fly between the two views.
74 -box
76 -no-box turn on/off bounding box. Default: on
78 -dbuf
80 -no-dbuf
82 turn on/off double buffering. If Flow runs slowly in full
83 screen, but fast in a smaller window (eg on old graphics cards
84 with too little memory), try turning this option off. Default:
85 on
86 -ncolors number
88 Number of Colors. Default: 200.
89 -delay number
91 Per-frame delay, in microseconds. Default: 10000 (0.01 sec‐
92 onds.).
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95 DISPLAY to get the default host and display number.
96 XENVIRONMENT
98 to get the name of a resource file that overrides the global
99 resources stored in the RESOURCE_MANAGER property.
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102 X(1), xscreensaver(1)
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105 Copyright (c) 1996 by Tim Auckland <Tim.Auckland@Procket.com> Incorpo‐
106 rating some code from Stephen Davies Copyright (c) 2000
107 Search code based on techniques described in "Strange Attractors: Cre‐
109 ating Patterns in Chaos" by Julien C. Sprott
110 Permission to use, copy, modify, and distribute this software and its
112 documentation for any purpose and without fee is hereby granted, pro‐
113 vided that the above copyright notice appear in all copies and that
114 both that copyright notice and this permission notice appear in sup‐
115 porting documentation.
116 This file is provided AS IS with no warranties of any kind. The author
118 shall have no liability with respect to the infringement of copyrights,
119 trade secrets or any patents by this file or any part thereof. In no
120 event will the author be liable for any lost revenue or profits or
121 other special, indirect and consequential damages.
122 Adapted from swarm.c Copyright (c) 1991 by Patrick J. Naughton.
124 Adapted from xswarm by Jeff Butterworth. (butterwo@ncsc.org).
126
128 Tim Auckland
129X Version 11 5.05-3 (06-Apr-2008) flow(6x)