1twang(6x) XScreenSaver manual twang(6x)
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6 twang - pluck pieces of the screen
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9 twang [--display host:display.screen] [--foreground color] [--back‐
10 ground color] [--window] [--root] [--window-id number] [--mono] [--in‐
11 stall] [--visual visual] [--shm] [--no-shm] [--delay usecs] [--duration
12 secs] [--border-color color] [--border-width integer] [--event-chance
13 fraction] [--friction fraction] [--springiness fraction] [--tile-size
14 integer] [--transference fraction] [--fps]
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17 Twang divides the screen into equal-sized tiles, and then plucks them
18 in various ways. Tiles are affected by their neighbors, so waves of mo‐
19 tion flow through the grid. This manpage describes v1.3 of the program.
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22 twang accepts the following options:
23 --window
25 Draw on a newly-created window. This is the default.
26 --root Draw on the root window.
28 --window-id number
30 Draw on the specified window.
31 --mono If on a color display, pretend we're on a monochrome display.
33 --install
35 Install a private colormap for the window.
36 --visual visual
38 Which visual to use. Legal values are the name of a visual
39 class, or the id number (decimal or hex) of a specific visual.
40 --shm
42 --no-shm
44 Use the shared memory extension (or not, respectively), if
45 available. This may speed things up a bit, but probably won't
46 make that much difference. If available, defaults to true, re‐
47 source useSHM.
48 --delay microseconds
50 The interframe delay, in microseconds. Defaults to 10000, re‐
51 source delay.
52 --duration seconds
54 How long to run before loading a new image. Default 120 sec‐
55 onds.
56 --border-color color
58 Color of the border surrounding each tile. Defaults to blue,
59 resource borderColor.
60 --border-width integer
62 Width of the border surrounding each tile. Defaults to 3, re‐
63 source borderWidth.
64 --event-chance fraction
66 The chance, per iteration, for an event to occur (such as
67 tweaking the orientation of a tile), in the range 0..1. De‐
68 faults to 0.01, resource eventChance.
69 --friction fraction
71 How much friction there is in the system, in the range 0..1.
72 This is the amount by which velocities are damped per itera‐
73 tion. Defaults to 0.05, resource friction.
74 --springiness fraction
76 How springy the tiles are, in the range 0..1. This is the
77 fraction of an orientation that gets turned into a velocity to‐
78 wards the center (resting point). Defaults to 0.1, resource
79 springiness.
80 --tile-size integer
82 Size (width and height) of each tile, not including the outer
83 edge of the border. Defaults to 120, resource tileSize.
84 --transference fraction
86 How much a tile's neighbors affect it, in the range 0..1. This
87 is the fraction of an orientation of a neighbor that gets
88 turned into a velocity in the same direction Defaults to 0.025,
89 resource transference.
90 --fps Display the current frame rate and CPU load.
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94 DISPLAY to get the default host and display number.
95 XENVIRONMENT
97 to get the name of a resource file that overrides the global
98 resources stored in the RESOURCE_MANAGER property.
99 XSCREENSAVER_WINDOW
101 The window ID to use with --root.
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104 There are resource equivalents for each option, noted above.
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107 twang should have more interesting events.
108 Ways of speeding it up need to be investigated. It's kinda sluggish,
110 especially on hugeass displays.
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113 xscreensaver(1)
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116 Copyright © 2002 by Dan Bornstein. All rights reserved.
117 Permission to use, copy, modify, distribute, and sell this software and
119 its documentation for any purpose is hereby granted without fee, pro‐
120 vided that the above copyright notice appear in all copies and that
121 both that copyright notice and this permission notice appear in sup‐
122 porting documentation. No representations are made about the suitabil‐
123 ity of this software for any purpose. It is provided "as is" without
124 express or implied warranty.
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127 Dan Bornstein <danfuzz@milk.com>.
128X Version 11 6.06-1.fc37 (12-Dec-2022) twang(6x)